ВЗАИМОПРОНИКАЮЩАЯ 'ЭЛАСТОМЕРНАЯ СЕТКА, ПОЛУЧЕННАЯ ИЗ ЧАСТИЦ ИЗМЕЛЬЧЕННОЙ ШИННОЙ РЕЗИНЫ

Изобретение относится к способам переработки шинной резины. Предложена гетерогенная матрица на основе резины для производства резиносодержащих продуктов, содержащая взаимопроникающую сетку из двух или более эластомеров, при этом указанная сетка содержит сшитые серными мостиками, перегруппированные переплетенные слоистые структуры, среднее расстояние между которыми составляет от 10 нм до 5 мкм, при этом каждая слоистая структура содержит один из двух или более эластомеров, выбранных из группы, состоящей из исходного натурального каучука, стирол-бутадиенового каучука, изобутилен-изопренового каучука и эластомера, полученного из измельченной шинной резины. Предложены также листы, содержащие указанную матрицу, и слоистые структуры из них. Предложенная гетерогенная матрица пригодна для создания листов и слоистых структур из них, применимых в различных коммерческих резиносодержащих продуктах. 3 н. и 9 з.п. ф-лы, 8 ил., 2 табл.

КОМПОЗИЦИЯ РЕЗИНОВОЙ СМЕСИ И ПНЕВМАТИЧЕСКАЯ ШИНА, ИЗГОТАВЛИВАЕМАЯ С ЕЕ ПРИМЕНЕНИЕМ

Изобретение относится к композиции резиновой смеси и шине. Резиновую смесь получают смешением 1-60 мас.ч. низкомолекулярного полимера на основе сопряженных диенов (В), имеющего среднемассовую молекулярную массу, измеренную по данным гельпроникающей хроматографии в пересчете на молекулярную массу полистирола от более чем 30000 до не более чем 200000, и содержание винильных связей на участке диенового соединения с сопряженными двойными связями не менее 40%, из расчета на 100 мас.ч. каучукового компонента (А), который смешивают с (В). Каучуковый компонент (А) содержит натуральный каучук и/или полиизопреновый каучук и, при необходимости, по меньшей мере, один каучук, выбранный из группы, состоящей из каучука на основе сополимера бутадиена и стирола, полибутадиенового каучука и изобутиленизопренового каучука. Причем низкомполекулярный полимер на основе сопряженных диенов (В) получен анионной полимеризацией, и общая доля содержания стирольных звеньев в низкомолекулярном полимере на основе сопряженных ...

РЕЗИНОВАЯ СМЕСЬ И ШИНА, ИЗГОТОВЛЕННАЯ С ЕЁ ИСПОЛЬЗОВАНИЕМ

Изобретение относится к резиновой смеси и шине, изготовленной с ее использованием. Резиновую смесь получают смешиванием, по меньшей мере, одного каучукового компонента, выбранного из натурального каучука и/или диенового синтетического каучука с диоксидом кремния и композицией эфира глицерина и жирной кислоты, в которой количество композиции эфира глицерина и жирной кислоты составляет 0,5-15 мас.ч. на 100 мас.ч. каучукового компонента; жирная кислота имеет 8-28 атомов углерода; композиция эфира глицерина и жирной кислоты включает моноэфир глицерина и жирной кислоты и диэфир глицерина и жирной кислоты; и содержание моноэфира глицерина и жирной кислоты в композиции эфира глицерина и жирной кислоты составляет 85 мас.% или менее и содержание диэфира глицерина и жирной кислоты в композиции эфира глицерина и жирной кислоты составляет 10-65 мас.%. Резиновая смесь улучшает диспергируемость диоксида кремния в резиновой смеси и технологичность путем уменьшения вязкости невулканизированной резины, ...

НАПОЛЬНОЕ ПОКРЫТИЕ, СОДЕРЖАЩЕЕ ТЕРМОПЛАСТИЧНЫЙ ЭЛАСТОМЕР, И СПОСОБ ЕГО ИЗГОТОВЛЕНИЯ

Настоящее изобретение относится к напольному покрытию и способу изготовления напольного покрытия. Данное напольное покрытие содержит полимерную композицию, включающую смесь компонента А, компонента В и компонента С. Компонент А включает полимер на основе олефина. Компонент В включает полимер, выбранный из полиэтилена (ПЭ), этилен винилацетата (ЭВА) или блок-сополимера стирол-этилен-бутилен-стирол (СЭБС). Полимер компонента В включает группы ангидрида малеиновой кислоты или группы акриловой кислоты, которые привиты к полимеру и составляют 1 мас.% или более компонента В. Компонент С включает термопластичный эластомер на основе стирола. Способ изготовления напольного покрытия включает стадии: обеспечение компонентов А, В и С; изготовление полимерной композиции посредством смешивания компонентов А, В и С в смесителе; формирование полимерной композиции в полотно. Технический результат – изготовление надежным и экономичным способом высококачественного напольного покрытия, имеющего хорошие адгезивные ...

ЗВУКОПОГЛОЩАЮЩАЯ САМОГЕРМЕТИЗИРУЮЩАЯСЯ ШИНА ДЛЯ КОЛЕС ТРАНСПОРТНЫХ СРЕДСТВ

Настоящее изобретение относится к звукопоглощающим самогерметизирующимся шинам для колес транспортных средств и к способу их производства. Звукопоглощающие самогерметизирующиеся шины содержат закрытоячеистые вспененные полиолефиновые материалы, предпочтительно с закрытыми макроячейками, необязательно перфорированные. Технический результат – улучшение технических характеристик, касающихся самогерметизации и шумопоглощения. 3 н. и 11 з.п. ф-лы, 9 ил., 8 табл.

ШИНЫ И ПРОТЕКТОРЫ, ИЗГОТОВЛЕННЫЕ ИЗ СМОЛЫ, ПОЛУЧЕННОЙ ПОЛИМЕРИЗАЦИЕЙ ФЕНОЛЬНЫХ, АРОМАТИЧЕСКИХ И ТЕРПЕНОВЫХ СОЕДИНЕНИЙ

Изобретение относится к композиции для протекторов шин, добавке для протекторов шин и способу приготовления композиции для протекторов шин. Композиция включает каучуковый компонент, выбранный из группы, состоящей из синтетического диенового каучука и природного каучука, и олигомерную смолу, полученную из компонента а), включающего по меньшей мере один мономер, представляющий собой терпен, выбранный из группы, состоящей из α-пинена, β-пинена, δ-3-карена, 3-карена, D-лимонена и дипентена, компонента b), включающего по меньшей мере один мономер, выбранный из группы, состоящей из стирола и α-метилстирола, и компонента с), включающего мономер, представляющий собой фенол. Технический результат - получение добавок для изготовления шин, улучшающих их свойства. 3 н.п. ф-лы, 6 табл.

ШИНА ДЛЯ КОЛЕС ТРАНСПОРТНЫХ СРЕДСТВ

Изобретение относится к шинам для колес транспортных средств, в частности, шины с высокими и сверхвысокими эксплуатационными характеристиками наряду с технологическим процессом их изготовления. Шина для колес транспортных средств, в которой, по меньшей мере, один компонент указанной шины содержит вулканизированную эластомерную композицию, полученную вулканизацией поддающейся вулканизации эластомерной композиции, содержащей, по меньшей мере, один эластомерный полимер P, по меньшей мере, один активный наполнитель а), по меньшей мере, одно вулканизирующее средство b) и по меньшей мере, одну совулканизирующую композицию с), полученную посредством смешивания c1) по меньшей мере, одного эластомерного полимера Р, с2) по меньшей мере, одного цинкового комплекса, полученного за счет взаимодействия между с3) от 20 до 80 массовыми частями, по меньшей мере, одного соединения цинка на 100 массовых частей Ри с4) от 20 до 80 массовыми частями - на 100 массовых частей Р, - по меньшей мере, одной низшей ...

СТАБИЛИЗАЦИЯ ПОЛИМЕРОВ, СОДЕРЖАЩИХ ГИДРОЛИЗУЕМЫЕ ФУНКЦИОНАЛЬНЫЕ ГРУППЫ

Изобретение относится к способу стабилизации полимера при возрастании вязкости по Муни. Способ включает полимеризацию сопряженного диенового мономера, необязательно с мономером, сополимеризуемым с ним, с литийорганическим инициатором для получения полимерного «клея», имеющего «живой» в нем полимер, реагирование «живого»полимера с функционализирующим агентом, содержащим гидролизуемую функциональную группу. Способ включает введение стабилизатора в указанный полимер, где стабилизатор определен формулой,в которой χ представляет собой гидролизуемую группу, из которой в результате гидролиза образуется фрагмент кислотного остатка, а каждый R, Rи Rнезависимо представляет собой атом галогена, гидрокарбильную группу, гидрокарбоксилатную группу или гидрокарбилоксигруппу. Выделяют функционализированный полимер. Изобретение позволяет повысить устойчивость к возрастанию вязкости по Муни. 8 з.п. ф-лы,4 табл., 7 пр.

ТЕХНОЛОГИЧЕСКОЕ МАСЛО С ВЫСОКИМИ ЭКСПЛУАТАЦИОННЫМИ ХАРАКТЕРИСТИКАМИ НА ОСНОВЕ ДИСТИЛЛИРОВАННЫХ АРОМАТИЧЕСКИХ ЭКСТРАКТОВ

Изобретение относится к вариантам способа получения нафтеновых технологических масел. Один из вариантов включает: a) вакуумную перегонку мазута из установки атмосферной перегонки нафтенового сырья с получением одного или более нафтеновых вакуумных газойлей в одном или более диапазонов вязкости; b) смешивание по меньшей мере одного такого нафтенового вакуумного газойля с сырьем в виде дистиллированных ароматических экстрактов с высоким содержанием углерода ароматических соединений (С) с получением по меньшей мере одного смешанного масла, при этом указанный нафтеновый вакуумный газойль содержит по меньшей мере 30% углерода нафтеновых соединений (C), по меньшей мере 10% и менее 24% углерода ароматических соединений (С) и менее 70% суммарного содержания углерода парафиновых соединений (С) плюс С, измеренного в соответствии с ASTM D2140, при этом по меньшей мере один указанный нафтеновый вакуумный газойль имеет вязкостно-весовую константу (ВВК) в диапазоне от 0,855 до 0,895, и при этом указанное ...

СМЕСЬ ФУНКЦИОНАЛИЗИРОВАННЫХ ПОЛИМЕРОВ ДЛЯ ШИН

Изобретение относится к смеси полимеров. Описана смесь полимеров, приемлемая для получения шины, протектора шины, боковой стенки шины, ленты конвейера, уплотнителя или рукава, состоящая из (a) от 60 до 96% мас. первого эластомерного полимера, (b) от 4 до 35% мас. второго полимера и, необязательно, (c) от 0 до 13% мас. одного или более масла-наполнителя(лей); причем первый эластомерный полимер может быть получен (I) анионной полимеризацией по меньшей мере одного мономера конъюгированного диена и, необязательно, одного или более α-олефинового мономера(ов) в присутствии инициатора полимеризации в органическом растворителе и, необязательно, (II) модификацией концов цепи полимера, полученного на этапе (I), путем добавления и проведения реакции по меньшей мере одного соединения, представленного любой из формул от (1) до (3) или от (11) до (15), как определено ниже; причем второй эластомерный полимер может быть получен (i) анионной полимеризацией в присутствии инициатора полимеризации в органическом ...

СТАБИЛИЗАЦИЯ ПОЛИМЕРОВ СТИРОЛПРОИЗВОДНЫМИ П-КРЕЗОЛАМИ

Изобретение относится к композиции для стабилизации термопластичных и/или эластомерных полимерных композиций. Композиция содержит смесь стиролпроизводных п-крезола и необязательно состабилизатор. Композиция является жидкой при комнатной температуре, имеет вязкость менее 40 Па·с (40000 сП) при 25°С, демонстрирует кислотное число, меньшее 0,1 мг КОН/г, и содержит 2,6-дистиролпроизводное п-крезола, определяемое на уровне не менее 70% по ГХ-площади. Смесь также содержит моностиролпроизводное п-крезола и тристиролпроизводное п-крезола, каждое из которых присутствует в концентрации, находящейся в диапазоне от примерно 1 до примерно 15% по ГХ-площади, в расчете на общую площадь стиролпроизводных п-крезола. Смесь стиролпроизводных п-крезола получают реакцией стирола с п-крезолом при молярном отношении от 1,85 до 2,1:1 соответственно. Реакцию проводят в присутствии кислотного катализатора при температуре от 40 до 150°С. Указанную стабилизирующую композицию вводят в эффективном количестве в полимерные ...

СПОСОБ ПОЛУЧЕНИЯ ФУНКЦИОНАЛИЗИРОВАННЫХ И РАЗВЕТВЛЕННЫХ ЭЛАСТОМЕРНЫХ СОПОЛИМЕРОВ И ИХ ПРИМЕНЕНИЕ В ВУЛКАНИЗИРУЕМЫХ ЭЛАСТОМЕРНЫХ КОМПОЗИЦИЯХ

Изобретение относится к способу получения функционализированных и разветвленных эластомерных сополимеров. Способ получения функционализированного и разветвленного эластомерного сополимера включает следующие этапы: (a) анионную сополимеризацию, по меньшей мере, одного конъюгированного диенового мономера и, по меньшей мере, одного виниларена в присутствии, по меньшей мере, одного углеводородного растворителя, по меньшей мере, одного литиевого инициатора и, по меньшей мере, одного полярного модификатора с получением содержащего эластомерный сополимер раствора; (b) взаимодействие, по меньшей мере, 10 мас.% полимерных цепей эластомерного сополимера, полученного на этапе (а), по меньшей мере, с одним соединением, содержащим хотя бы одну функциональную группу, выбранную из эпоксидов, кетонов, сложных эфиров, альдегидов, с получением раствора, содержащего функционализированный эластомерный сополимер; (c) добавление к полученному на этапе (b) раствору литиевого инициатора в количестве, от 1 до 4 ...

ПОЛИМЕРЫ, МОДИФИЦИРОВАННЫЕ АМИНОСИЛАНОМ

Изобретение относится к модифицированным макромолекулярным соединениям, которые могут быть получены путем использования определенных соединений аминосилановых инициаторов полимеризации и, необязательно, соединений, модифицирующих концы цепей. Изобретение также относится к полимерным композициям, содержащим такие модифицированные макромолекулярные соединения, и к использованию таких композиций в получении вулканизированных (сшитых) эластомерных полимерных композиций и изделий. Техническим результатом является улучшение эксплуатационных характеристик получаемых изделий. 10 н. и 36 з.п. ф-лы, 11 табл.

СОДЕРЖАЩИЙ ГИДРОКСИЛЬНЫЕ ГРУППЫ МЕТИЛСТИРОЛ И ПОЛИМЕРЫ НА ЕГО ОСНОВЕ

Изобретение относится к эластомерным композициям, содержащим один или более армирующих наполнителей. Описан способ получения соединения полимера, содержащего мономерное звено полиена, включающий а) анионное инициирование полимеризации по меньшей мере одного типа полиена и соединения, имеющего общую формулугде m означает целое число от 2 до 5, и каждая группа Gнезависимым образом является защитной группой, причем указанный, по меньшей мере, один тип полиена полимеризуют до полимеризации указанного соединения, и где число звеньев, получаемых из указанного соединения, равно от 1 до 10, с получением, таким образом, полимера, и b) одно из тушения полимера, реакции полимера с соединением, обрывающим рост цепи, или полимеризации дополнительных количеств указанного по меньшей мере одного типа полиена. Технический результат: улучшение параметров сцепления с дорогой и сопротивление качению. 11 з.п. ф-лы, 7 табл.

МЕТАЛЛОКОМПЛЕКСНЫЙ КАТАЛИЗАТОР И СПОСОБЫ ПОЛИМЕРИЗАЦИИ С ЕГО ИСПОЛЬЗОВАНИЕМ

Изобретение относится к способу получения полимера, который содержит беспорядочно распределенные полиеновые и α-олефиновые звенья. Указанный способ включает a) приведение этиленненасыщенных углеводородов, которые содержат по меньшей мере один полиен и по меньшей мере один α-олефин, в контакт с каталитической композицией, которая содержит активатор катализатора и комплекс, определяемый общей формулой,где М представляет собой атом металла группы III; L представляет собой нейтральное основание Льюиса; z представляет собой целое число от 0 до 3 включительно; m представляет собой целое число от 1 до 5 включительно; n равно 1 или 2; каждый Rпредставляет собой электроноакцепторную группу или атом или электронодонорную группу или атом; и Rпредставляет собой моноанионный лиганд Х-типа, при условии что R-содержащая фенильная группа прикреплена в 2-м или 3-м положении инденильного лиганда; и b) создание условий для образования указанного полимера из указанных этиленненасыщенных углеводородов. Изобретение ...

СМЕСИ СИЛАНОВ И СПОСОБ ПРИГОТОВЛЕНИЯ ТАКИХ СМЕСЕЙ СИЛАНОВ

Изобретение относится к смесям силанов, применяемых при изготовлении резиновых смесей. Предложена смесь силанов, содержащих силан формулы I и силан формулы II, где R1 имеют одинаковые или разные значения и представляют собой С1-С10алкоксигруппы, R2 отсутствуют, R3 и R4 имеют одинаковые или разные значения и представляют собой неразветвленную, насыщенную алифатическую двухвалентную углеводородную группу с С1-С30, х обозначает целое число от 1 до 2, при этом в том случае, когда х обозначает 1, R5 представляет собой водород или группу -C(=O)-R8, где R8 представляет собой С1-С20алкильную группу и n обозначает 1, а в том случае, когда х обозначает 2, R5 представляет собой -(R4-S)n-R3-Si(R1)y(R2)3-y и n обозначает 0 или 1, и у представляют собой 3, при этом молярное соотношение между силаном формулы I и силаном формулы II составляет от 15:85 до 90:10. Предлагаемую в изобретении смесь силанов можно приготавливать путем смешения силанов формулы I и силанов формулы II. Технический результат – предложенные ...

НОВЫЙ СПОСОБ ПОЛУЧЕНИЯ ОСАЖДЕННЫХ ДИОКСИДОВ КРЕМНИЯ, НОВЫЕ ОСАЖДЕННЫЕ ДИОКСИДЫ КРЕМНИЯ И ИХ ПРИМЕНЕНИЯ, В ЧАСТНОСТИ, ДЛЯ АРМИРОВАНИЯ ПОЛИМЕРОВ

Изобретение может быть использовано в производстве изделий на основе полимерных композиций, таких как шины. Осажденный диоксид кремния имеет удельную поверхность БЭТ от 45 до 550 м/г. Содержание поликарбоновой кислоты в осажденном диоксиде кремния наряду с соответствующим карбоксилатом, выраженное в пересчете на общий углерод, составляет, по меньшей мере, 0,15% по массе, а содержание алюминия составляет, по меньшей мере, 0,20% по массе. Осажденный диоксид кремния имеет на своей поверхности молекулы смеси поликарбоновых кислот, выбираемых из адипиновой кислоты, янтарной кислоты, этилянтарной кислоты, глутаровой кислоты, метилглутаровой кислоты, щавелевой кислоты или лимонной кислоты. Изобретение позволяет снизить вязкость полимерных композиций, содержащих армирующий наполнитель, при одновременном сохранении их механических свойств. 7 н. и 27 з.п. ф-лы, 15 табл., 6 пр.

МОДИФИЦИРОВАННЫЕ ЭЛАСТОМЕРНЫЕ СОПОЛИМЕРЫ С НИЗКИМ СОДЕРЖАНИЕМ ВИНИЛОВЫХ СВЯЗЕЙ

Изобретение относится к модифицированному эластомерному полимеру. Модифицированный эластомерный полимер получают посредством приведения в контакт живого анионного эластомерного полимера с конкретным модифицирующим концевую группу цепи соединением, причем живой анионный эластомерный полимер содержит по меньшей мере 75 и менее чем 99 мас.% бутадиеновых элементарных звеньев и более чем 1 и менее чем 25 мас.% стирольных элементарных звеньев и характеризуется содержанием виниловых связей от 2 до менее чем 10% исходя из полибутадиеновой фракции живого анионного эластомерного полимера. Изобретение позволяет улучшить сцепление шины при применении вулканизированного модифицированного полимера с мокрым дорожным покрытием, повысить устойчивость к истиранию, улучшить устойчивость к качению. 4 н. и 21 з.п. ф-лы, 4 табл.

КАУЧУКОВАЯ КОМПОЗИЦИЯ, ВКЛЮЧАЮЩАЯ КРЕМНИЙОРГАНИЧЕСКИЙ СВЯЗУЮЩИЙ АГЕНТ

Изобретение относится к диеновым каучуковым композициям, усиленным неорганическим наполнителем, которые можно использовать, в частности, для производства шин или полуфабрикатов для шин, в том числе протекторов. Основу композиции составляют, по меньшей мере: один диеновый эластомер, одна сшивающая система на основе серы, один неорганический наполнитель в качестве усиливающего наполнителя, один связующий агент, имеющий общую формулу: (HO)R Si-Z-S-R,в которой каждая из групп R, которые являются одинаковыми или различными, представляет собой одновалентную группу на углеводородной основе, выбранную из алкильных групп, которые являются линейными или разветвленными, циклоалкильных или арильных групп, содержащих от 1 до 18 атомов углерода; Rпредставляет собой одновалентную группу на углеводородной основе, выбранную из алкильных групп, которые являются линейными или разветвленными, циклоалкильных или арильных групп, содержащих от 1 до 30 атомов углерода; Z представляет собой двухвалентную соединительную ...

РЕЗИНОВАЯ КОМПОЗИЦИЯ, ВУЛКАНИЗИРОВАННАЯ РЕЗИНА И ШИНА

Изобретение относится к резиновым композициям для получения шин. Предложена резиновая композиция, включающая каучуковый компонент, содержащий натуральный каучук, полибутадиеновый каучук и стирол-бутадиеновый сополимерный каучук, и от 50 до 90 частей по массе наполнителя, содержащего диоксид кремния в расчете на 100 частей по массе каучукового компонента, в котором масса n натурального каучука в каучуковом компоненте составляет 40% по массе или больше, масса n, масса b полибутадиенового каучука и масса s стирол-бутадиенового сополимерного каучука удовлетворяют соотношению: s ≤ b ≤ n при условии, что, когда n = b, s < b, и 50% по массе или больше диоксида кремния содержатся в фазе, включающей полибутадиеновый каучук и стирол-бутадиеновый сополимерный каучук, причем либо один, либо оба из полибутадиенового каучука и стирол-бутадиенового сополимерного каучука модифицированы модифицирующей функциональной группой, которая содержит по меньшей мере один атом, выбранный из группы, состоящей из атома ...

ПРОЗРАЧНАЯ, УДАРНОВЯЗКАЯ И ТЕПЛОСТОЙКАЯ КАУЧУКОВАЯ КОМПОЗИЦИЯ, СОДЕРЖАЩАЯ КАТАЛИЗИРОВАННЫЙ НЕОДИМОМ ИЗОПРЕНОВЫЙ КОМПОНЕНТ, И СПОСОБ ЕЕ ИЗГОТОВЛЕНИЯ

Изобретение относится к получению каучуковой композиции, характеризующейся высокими прозрачностью, ударной вязкостью и теплостойкостью. Композиция содержит катализированный неодимом изопреновый каучуковый (IR) компонент в количестве от 5 до 95 массовых частей и каучуковый полимерный компонент (RB), выбранный из группы: бутадиеновый каучук (BR), 1,2-полибутадиенового каучука, стирол-бутадиеновый каучук (SBR), при условии, что совокупное количество полимеров IR и RB составляет 100 массовых частей. При этом композиция является свободной от диоксида кремния и характеризуется мутностью, меньшей чем 20% в отношении листа с толщиной 2 мм, а твердостью по дюрометру типа А (0 сек), составляющей приблизительно 30 и более. При этом неодимкатализированный изопреновый каучук имеет уровень содержания цис-изомера 95% или более и включает приблизительно 10000 ч./млн или менее железа или лития. Композиция обеспечивает превосходную прозрачность, прочность и теплостойкость. 3 н. и 12 з.п. ф-лы, 5 табл., 9 ...

НЕ СОДЕРЖАЩИЕ ДИФЕНИЛГУАНИДИНА СМЕСИ КАУЧУКОВ, СОДЕРЖАЩИЕ КОРОТКОЦЕПНЫЕ АЛКИЛОВЫЕ СЛОЖНЫЕ ЭФИРЫ ГЛИЦЕРИНА

Изобретение относится к по существу не содержащим дифенилгуанидин смесям каучуков. Смесь каучуков содержит неполярный каучук, выбранный из группы NR, SBR, BR, IR, IIR, ENR и EPDM, предпочтительно NR, SBR, BR, IR, IIR и EPDM, основанный на кремниевой кислоте наполнитель и/или сажу и короткоцепной алкиловый сложный эфир глицерина указанной формулы. Изобретение позволяет улучшить диспергирование, увеличить время подвулканизации смеси и уменьшить ее вязкость, а также увеличить стойкость к износу, прочность при растяжении, твердость и снизить показатели коэффициента потерь вулканизатов. 8 н. и 12 з.п. ф-лы, 2 табл.

ПНЕВМАТИЧЕСКАЯ ШИНА

Изобретение относится к автомобильной промышленности. Пневматическая шина имеет протектор, в котором содержится вулканизируемая каучуковая композиция, содержащая в расчете на 100 массовых частей эластомера (phr) (мас. ч. на 100 мас. ч. эластомера): (A) от приблизительно 50 до приблизительно 90 phr полимеризованного в растворе стирол-бутадиенового каучука, у которого температура стеклования (Tg) составляет от -65°C до -55°C; (B) от приблизительно 50 до приблизительно 10 phr полибутадиена, у которого цис-1,4 содержание составляет более чем 95 процентов и Tg составляет от -80 до -110°C; и (C) от 30 до 80 phr сочетания масла и терпен-фенольной смолы, у которой Tg составляет более чем 100°C. Технический результат – улучшение характеристик износостойкости, сопротивления качению и проскальзывания шин на мокрой дороге. 9 з.п. ф-лы, 3 табл.

СПОСОБ ПОЛУЧЕНИЯ РАЗВЕТВЛЕННЫХ ФУНКЦИОНАЛИЗИРОВАННЫХ ДИЕНОВЫХ (СО)ПОЛИМЕРОВ

Изобретение относится к области получения синтетических каучуков, в частности диеновых (со)полимеров, таких как полибутадиен, полиизопрен и бутадиен-стирольный каучук (БСК), применяемых при производстве шин, резинотехнических изделий, модификации битумов, в электротехнической и других областях. Описан способ получения (со)полимеров, который осуществляют в двух параллельных реакторах, в каждом из которых проводят полимеризацию диенов или сополимеризацию их между собой и/или с арилвинильными соединениями. При этом в первый реактор подают литийорганический инициатор, электронодонорную добавку и разветвляющий агент, во второй реактор подают литийорганический инициатор, электронодонорную добавку и функционализирующий агент. Полученные в первом и втором реакторах полимеризационные смеси смешивают друг с другом, затем осуществляют реакцию обрыва цепи. Технический результат - получение разветвленных функционализированных (со)полимеров диенов, характеризующихся статистическим распределением мономерных ...

ПЛАСТИФИКАТОР ДЛЯ РЕЗИН И КАУЧУКОВ

Изобретение относится к резиновой промышленности, конкретно к пластификатору для резиновых смесей на основе бутадиен-метилстирольного каучука и может быть использовано в производстве резины различного назначения. Пластификатор представляет собой симметричный или несимметричный эфир дикарбоновой алифатической или циклоалифатической кислоты С2-С10, соответствующий общей формуле R1O-C(=O)-B-C(=O)-OR2, где В - алкилен C1-C8 циклического или нециклического строения либо его отсутствие, в случае симметричных эфиров дикарбоновых кислот: R1=R2=[CH(R)-CH2-O]n-R3, где R=Н или СН3, R3=Alk или Ar, n=1,0…4,0; Alk - радикал С4-С10, Аr - радикал С6-С13, в случае несимметричных эфиров дикарбоновых кислот: R1=[CH(R)-CH2-O]n-R3, где R=Н или СН3, R3=Alk или Ar; n=1,0…4,0; R2=Alk, Аr, [CH(R)-CH2-O]x-R4, где R=Н или СН3, R4=Alk или Ar, х=1,0…4,0; Alk - радикал С4-С10, Аr - радикал С6-С13. Техническим результатом изобретения является расширение спектра экологически безопасных добавок для резин на основе бутадиен-метилстирольного ...

ДИНАМИЧЕСКИ ВУЛКАНИЗИРОВАННЫЕ РАСПЛАВЫ

Изобретение относится к динамически вулканизированным расплавам, содержащим эластомер и термопластичные смолы, и может найти применение для изготовления герметизирующего слоя покрышки, камеры покрышки, надувной камеры, рукава, ленты, пневматической рессоры или подложки для кузова машины. Динамически вулканизированный расплав содержит по меньшей мере один эластомер, по меньшей мере одну термопластичную смолу, обладающую температурой плавления в диапазоне от 170 до 260°С, графен и смолу, содержащую сополимер этилена с виниловым спиртом, где эластомер содержится в виде фазы частиц, диспергированных в непрерывной фазе термопластичной смолы. Изобретение обеспечивает снижение газопроницаемости. 3 н. и 17 з.п. ф-лы, 2 табл., 2 ил.

ВСТРЕЧНО СУЖАЮЩИЕСЯ ТЕРМОПЛАСТИЧНЫЕ ЭЛАСТОМЕРЫ

Композиция встречно сужающихся термопластичных эластомеров, содержащая: (а) встречно сужающийся диблочный сополимер А-[А/В] с пиковой молекулярной массой от 20000 до 250000, который включает моновинилароматический гомополимерный блок А с пиковой молекулярной массой по меньшей мере 8000 и встречно сужающийся сополимерный блок [А/В] с содержанием винила по меньшей мере 15 мас. % в расчете на количество звеньев сопряженного диена в диблочном сополимере; и (b) блок-сополимер, выбранный из группы, состоящей из линейных триблок-сополимеров, имеющих пиковую молекулярную массу, которая по меньшей мере примерно в 1,5 раза больше пиковой молекулярной массы встречно сужающегося диблочного сополимера А-[А/В], описанного в (а), многолучевых связанных блок-сополимеров, имеющих пиковую молекулярную массу, которая по меньшей мере примерно в 2,5 раза больше пиковой молекулярной массы встречно сужающегося диблочного сополимера А-[А/В], описанного в (а), и их смесей; и (с) причем отношение (а) к (b) в композиции ...

Озоностойкая эластомерная композиция на основе бутадиен-стирольного каучука

Изобретение относится к области создания эластомерных композиций на основе бутадиен-стирольного каучука, которые можно использовать для изготовления резинотехнических изделий, обладающих стойкостью к действию износа, в шинной промышленности и других отраслях, где необходима озоностойкость. Эластомерная композиция содержит бутадиен-стирольный каучук, изопреновый каучук, ускоритель вулканизации тиурам Д, оксид цинка, стеариновую кислоту, технический углерод и модифицированный сополимером этилена с винилацетатом регенерат. Техническим результатом предлагаемого решения является повышение озоностойкости. 2 пр., 2 табл.

Резиновая смесь

Изобретение относится к резиновой промышленности, в частности к производству резиновых смесей, используемых для изготовления изделий различного целевого назначения, в том числе для прокладок рельсовых скреплений железнодорожного пути. Резиновая смесь содержит изопреновый каучук СКИ-3, бутадиен-метилстирольный каучук с содержанием α-метилстирола 22-25 мас.%, бутадиен-нитрильный каучук с содержанием нитрила акриловой кислоты 27-29 мас.%, серу, N,N'-дитиодиморфолин, тетраметилтиурамдисульфид, N-циклогексил-2-бензтиазолилсульфенамид, оксид цинка, стеариновую кислоту, N-изопропил-N'-фенил-п-фенилендиамин, ацетонанил Н, воск ЗВ-П, технический углерод N 220, технический углерод П 514, диоксид кремния Zeosil 1165 MP, гепсол ХКП, канифоль, N-нитрозодифениламин, масло индустриальное И-12А, транс-полинорборнен и диатомит NDP-D-400. Предложенное изобретение позволяет уменьшить изменение массы после суточного воздействия масла индустриального И-20А, уменьшить изменение условной прочности при растяжении ...

СТАБИЛИЗИРОВАННЫЕ МНОГОВАЛЕНТНЫЕ ИНИЦИАТОРЫ АНИОННОЙ ПОЛИМЕРИЗАЦИИ И СПОСОБЫ ПОЛУЧЕНИЯ УКАЗАННЫХ ИНИЦИАТОРОВ

... 1. Композиция стабилизированного раствора инициатора, содержащего:i. инициатор с удлиненной цепью, определенный формулой I:где SOL представляет собой двухвалентный солюбилизирующий компонент, х представляет собой целое число от 1 или более, Q представляет собой (a) элемент, выбранный из группы, состоящей из О, S, N, Р и Si, или (b) многовалентную органическую группу, и R, R, Rи Rнезависимо представляют собой одновалентную органическую группу, или Rсоединяется с Rс образованием трехвалентной органической группы и/или Rсоединяется с Rс образованием трехвалентной органической группы, или инициатор с удлиненной цепью, определенный формулой VI:где каждый SOL независимо представляет собой двухвалентный солюбилизирующий компонент, x представляет собой целое число от 1 или более, и R, Rи Rкаждый независимо представляют собой двухвалентную органическую группу; иii. алифатический растворитель, циклоалифатический растворитель или смесь указанных растворителей.2. Композиция по п. 1, отличающаяся тем ...

СШИВАЕМЫЕ ПОЛИМЕРЫ ВИНИЛИДЕНФТОРИДА И ТРИФТОРЭТИЛЕНА

... 1. Полукристаллический фторполимер [полимер (F)], содержащий:- повторяющиеся звенья, получаемые из винилиденфторида (VDF);- от 10% до 50 мол.% [относительно общего мольного количества повторяющихся звеньев полимера (F)] повторяющихся звеньев, получаемых из трифторэтилена (TrFE); и- от 0,01% до 10 мол.% [относительно общего мольного количества повторяющихся звеньев полимера (F)] повторяющихся звеньев, получаемых, по меньшей мере, из одного мономера, содержащего азидную группу [мономер (Az)].2. Полимер (F) по п. 1, где мономер (Az) соответствует формуле (I), приведенной ниже:CXX=CX-(O)-R-(CH)-[S(O)]N, формула (I),где X, Xи X, одинаковые или отличные друг от друга, независимо обозначают H или F, p равно 0 или 1, n равно от 0 до 4, s равно 0 или 1, q равно 1 или 2, Rобозначает двухвалентную (гидро)фторуглеродную группу, возможно, прерываемую одним или несколькими эфирными атомами кислорода.3. Полимер (F) по п. 2, где мономер (Az) соответствует формуле (II):CXX=CX-O-R-(CH)-[S(O)]Nформула (II ...

СПОСОБ ПОЛУЧЕНИЯ ФУНКЦИОНАЛИЗИРОВАННЫХ И РАЗВЕТВЛЕННЫХ ЭЛАСТОМЕРНЫХ СОПОЛИМЕРОВ И ИХ ПРИМЕНЕНИЕ В ВУЛКАНИЗИРУЕМЫХ ЭЛАСТОМЕРНЫХ КОМПОЗИЦИЯХ

... 1. Способ получения функционализированного и разветвленного эластомерного сополимера, включающий следующие этапы:(a) анионную сополимеризацию, по меньшей мере, одного конъюгированного диенового мономера и, по меньшей мере, одного виниларена в присутствии, по меньшей мере, одного углеводородного растворителя, по меньшей мере, одного литиевого инициатора и, по меньшей мере, одного полярного модификатора с получением содержащего эластомерный сополимер раствора;(b) взаимодействие, по меньшей мере, 10 мас.% полимерных цепей эластомерного сополимера, полученного на этапе (а), по меньшей мере, с одним соединением, содержащим хотя бы одну функциональную группу, выбранную из эпоксидов, кетонов, сложных эфиров, альдегидов, с получением раствора, содержащего функционализированный эластомерный сополимер.(c) добавление к полученному на этапе (b) раствору литиевого инициатора в количестве, от 1 до 4 раз превышающем молярное количество инициатора, использованного на этапе (а), а также соединения брома ...

КОМПОЗИЦИИ ДЛЯ ГЕРМЕТИЧНЫХ ЗАТВОРОВ И ГЕРМЕТИЧНЫЕ ЗАТВОРЫ, КОТОРЫЕ ВКЛЮЧАЮТ УКАЗАННЫЕ КОМПОЗИЦИИ

... 1. Композиция для затворов из крончатых колпачков, которая содержит от 20 до 70 мас.% термопластичного каучука, являющегося линейным термопластичным сополимером 70/30 бутадиена и стирола, полимеризованным в растворе, и от 80 до 30 мас.% термопластичного полимера, выбранного из группы, состоящей из полипропилена и полиэтилена, модифицированного этилвинилацетатом (EVA).2. Композиция по п.1, в которой термопластичный каучук имеет индекс текучести расплава приблизительно 5 г/10 мин (190°С и 5 кг) и твердость по Шору А приблизительно 68.3. Композиция по п.1 или 2, в которой термопластичным полимером является полипропилен с индексом текучести расплава приблизительно 14 г/10 мин (230°С и 2,16 кг) и твердость по Шору D приблизительно 30.4. Композиция по п.1 или 2, дополнительно содержащая смазку или углеводородное масло.5. Композиция по п.4, в которой смазкой является эрукамид с концентрацией от 1 до 5 мас.%.6. Композиция по п.4, в которой углеводородным маслом является углеводородное масло от ...

СПОСОБ ПОЛУЧЕНИЯ ДИЕНОВЫХ ПОЛИМЕРОВ ИЛИ СТАТИСТИЧЕСКИХ ВИНИЛАРЕН-ДИЕНОВЫХ СОПОЛИМЕРОВ

... 1. Способ получения диеновых полимеров или статистических виниларен-диеновых сополимеров, включающий анионную (со)полимеризацию в присутствии, по меньшей мере, одного углеводородного растворителя, по меньшей мере, одного конъюгированного диенового мономера и, возможно, по меньшей мере, одного виниларена, в присутствии, по меньшей мере, одного литиевого инициатора, по меньшей мере, одного апротонного полярного соединения и, по меньшей мере, одного соединения, содержащего одну или более функциональную группу ацетиленового типа.2. Способ получения диеновых полимеров или статистических виниларен-диеновых сополимеров по п. 1, где указанный углеводородный растворитель выбран из алифатических или ароматических углеводородных растворителей, таких как н-пентан, н-гексан, н-гептан, циклогексан или их смеси.3. Способ получения диеновых полимеров или статистических виниларен-диеновых сополимеров по пп. 1 или 2, где указанный конъюгированный диеновый мономер выбран из конъюгированных диеновых мономеров ...

СТАБИЛЬНАЯ ПРИ ХРАНЕНИИ, СШИВАЕМАЯ ПОЛИМЕРНАЯ СМЕСЬ НА ОСНОВЕ ХЛОРИРОВАННОГО ПОЛИМЕРА

... 1. Сшиваемая полимерная смесь для применения в качестве смеси для изготовления оболочки электрических и/или оптических кабелей и проводов, которая содержит полихлоропрен и следующие компоненты:100 м.ч. полихлоропрена в качестве полимера, который содержит натуральный каучук (NR) и/или бутадиенстирольный каучук (SBR) в количестве от 0 до 40 м.ч./100 м.ч. каучука;минеральный наполнитель в количестве от 20 до 100 м.ч./100 м.ч. каучука;необязательно краситель;по меньшей мере один пластификатор;противостаритель;технологическую добавку в количестве от 3 до 16 м.ч./100 м.ч. каучука;необязательно связующий агент в количестве от 0,5 до 4,0 м.ч./100 м.ч. каучука;сшивающую систему, которая содержит метил-2-меркаптобензимидазол в количестве от 0,3 до 2,0 м.ч./100 м.ч. каучука, силан в количестве от 0,5 до 4,0 м.ч./100 м.ч. каучука, 3-метил-2-тиазолидинтион в количестве от 0,5 до 4,0 м.ч./100 м.ч. каучука и дисульфид 2-меркаптобензотиазола в количестве от 0,3 до 2 м.ч./100 м.ч. каучука;стабилизатор в ...

ОБРАБОТАННЫЕ НАПОЛНИТЕЛИ, КОМПОЗИЦИИ, СОДЕРЖАЩИЕ ИХ, И ИЗДЕЛИЯ, ИЗГОТОВЛЕННЫЕ ИЗ НИХ

СПОСОБ ИЗГОТОВЛЕНИЯ ПЕРЧАТОК, ПЕРЧАТКА И ЭМУЛЬСИОННАЯ КОМПОЗИЦИЯ ДЛЯ ИЗГОТОВЛЕНИЯ ПЕРЧАТОК

Изобретение относится к способу изготовления перчатки, причем указанный способ содержит: (1) этап, на котором погружают перчаточную форму в жидкий коагулянт, содержащий ионы кальция, таким образом, чтобы указанный коагулянт мог прилипать к указанной перчаточной форме; (2) этап, на котором регулируют pH до 9 или выше с использованием аммониевого соединения или аминного соединения и оставляют эмульсионную композицию для изготовления перчаток, которая имеет описанный ниже состав, при перемешивании; (3) этап окунания, на котором погружают указанную перчаточную форму, к которой на указанном этапе (1) прилип указанный коагулянт, в указанную эмульсионную композицию для изготовления перчаток; (4) этап гелеобразования, на котором оставляют указанную перчаточную форму, к которой прилипла указанная эмульсионная композиция для изготовления перчаток, при такой температуре в течение такого периода, которые удовлетворяют следующим условиям: условия: температура и период, которые позволяют указанным ионам ...

РЕЗИНОВАЯ СМЕСЬ ДЛЯ ИЗГОТОВЛЕНИЯ ШУМОПОГЛОЩАЮЩИХ ПОКРЫТИЙ

Изобретение относится к резиновой промышленности и может быть использовано в производстве акустических материалов для снижения шумовых уровней акустических полей защищаемого объекта, находящегося под водой, в частности для объектов судостроения. Резиновая смесь для изготовления шумопоглощающих покрытий на основе бутадиен-метилстирольного каучука СКМС-30АРК включает, мас.ч.: серу - 2,8-3,2, тиазол 2МБС - 1,8-2,2, гуанид Ф - 0,5-1,5, оксид цинка - 3,0, стеариновую кислоту - 1,0-1,5, нафтам-2 - 1,0, канифоль - 1,0-1,5, технический углерод П514 - 20,0-25,0, технический углерод N220 - 40,0-45,0, корундовые микросферы HCM-L - 3,0-5,0, СЭВА 11808-3400 - 10,0-15,0, транс-полинорборнен - 20,0-30,0, дибутилфталат - 5,0-10,0, масло индустриальное И-12А - 25,0-30,0, гепсол ХПК - 1,0-1,5, N-нитрозодифениламин - 1,0. Изобретение обеспечивает улучшение технологических свойств при формовании полимерного материала для изготовления акустических пластин с улучшенными гидроакустическими показателями и улучшение ...

ШИПОВАННАЯ ШИНА

Изобретение относится к автомобильной промышленности. Шипованная шина изобретения содержит шиповые шпильки (шипы противоскольжения) (20), устанавливаемые в поверхность участка (1) протектора, контактирующую с дорожным покрытием. Участок (1) протектора образован из каучуковой композиции, содержащей диеновый каучук, который содержит по меньшей мере один каучук, который выбирают из натурального каучука, бутадиен-стирольного каучука и бутадиенового каучука, от 5 до 50 весовых частей углеродной сажи и от 5 до 70 весовых частей кремнезема на 100 весовых частей диенового каучука. Температура стеклования диенового каучука не превышает -60 °C. Удельная площадь поверхности по адсорбции азота углеродной сажи составляет от 50 до 120 м/г. Удельная площадь поверхности по ЦТАБ кремнезема составляет от 80 до 190 м/г. Твердость каучука для каучуковой композиции не превышает 60. Произведение (S × A) напряжения S (МПа) в момент 400% удлинения и площади нижней поверхности A (мм), расположенной внизу фланцевой ...

ФУНКЦИОНАЛИЗИРОВАННЫЙ ИНИЦИАТОР АНИОННОЙ СОПОЛИМЕРИЗАЦИИ И СПОСОБ ЕГО ПОЛУЧЕНИЯ, СОПОЛИМЕРЫ, ПОЛУЧЕННЫЕ С ПРИМЕНЕНИЕМ ДАННОГО ИНИЦИАТОРА, И РЕЗИНОВЫЕ СМЕСИ НА ОСНОВЕ УКАЗАННЫХ СОПОЛИМЕРОВ

Изобретение относится к способу получения функционализированного, азотсодержащего литийорганического инициатора анионной сополимеризации. Способ включает следующие стадии: (1) взаимодействие в среде углеводородного растворителя при непрерывном перемешивании литийорганического соединения, вторичного амина, представленного общей формулой (I),где R, R- одинаковые или различные, ароматические или алифатические заместители, представляющие собой углеводородную группу, содержащую от 1 до 20 атомов углерода, причем Rможет содержать одну вторичную аминогруппу, и азотсодержащей электронодонорной добавки; и (2) добавление при постоянном перемешивании единовременно или порционно в две или более подачи к полученному на стадии (1) амиду лития сопряженного диена в молярном соотношении от 1 до 4 на 1 моль лития. Также предложены вариант способа получения функционализированного азотсодержащего литийорганического инициатора анионной сополимеризации, функционализированный азотсодержащий литийорганический ...

СПОСОБ ИЗГОТОВЛЕНИЯ КАУЧУКОВОЙ КОМПОЗИЦИИ, КАУЧУКОВАЯ КОМПОЗИЦИЯ И ПОКРЫШКА

Изобретение относится к способу изготовления каучуковой композиции. Описан способ изготовления каучуковой композиции для покрышек, содержащей 100 мас.ч. каучукового компонента (А), включающего по меньшей мере 80 мас.% стирол-бутадиенового сополимерного каучука; наполнитель (В), включающий от 80 до 130 мас.ч. диоксида кремния, характеризующегося площадью удельной поверхности по адсорбированию азота в диапазоне от по меньшей мере 85 до менее чем 120 м/г; от 5 до 15 мас.ч. силанового аппрета (С); по меньшей мере один компонент (D), выбираемый из тиомочевины и диэтилтиомочевины; и вулканизатор (Е), при этом способ включает замешивание каучуковой композиции на множестве ступеней, где замешивание включает ступень первого замешивания путем замешивания 100 мас.ч. каучукового компонента (А), наполнителя (В), включающего по меньшей мере 80 мас.ч. диоксида кремния, по меньшей мере 2 мас.ч. силанового аппрета (С) и всего или некоторого количества по меньшей мере одного компонента (D), выбираемого из ...

Смеси силанов и способ приготовления таких смесей силанов

КОМПОЗИЦИЯ НА ОСНОВЕ ТЕРМОПЛАСТИЧНОЙ СМОЛЫ И ИЗДЕЛИЕ, ОТФОРМОВАННОЕ ИЗ ЭТОЙ КОМПОЗИЦИИ

НЕ СОДЕРЖАЩИЕ ДИФЕНИЛГУАНИДИНА СМЕСИ КАУЧУКОВ, СОДЕРЖАЩИЕ КОРОТКОЦЕПНЫЕ АЛКИЛОВЫЕ СЛОЖНЫЕ ЭФИРЫ ГЛИЦЕРИНА

НАБУХАЮЩИЕ ЭЛАСТОМЕРНЫЕ ПОЛИМЕРНЫЕ МАТЕРИАЛЫ

... 1. Эластомерная композиция, содержащая эластомерную матрицу и смешанный с ней прекурсор набухающего соединения, при этом прекурсор имеет ограниченную растворимость в жидкости, такой как вода, и прекурсор может быть превращен в соединение, которое растворимо в указанной жидкости, такой как вода.2. Композиция по п. 1, в которой указанный прекурсор является солью, имеющей низкую растворимость в воде, которая может быть превращена в соль, имеющую более высокую растворимость в воде.3. Композиция по п. 1 или 2, в которой указанный прекурсор может быть превращен путем контактирования с кислым или основным раствором.4. Композиция по п. 1 или 2, в которой указанный прекурсор выбран из группы, состоящей из Ca(PO), BaCO, MgO, ZnS, Fe(OH), BaSOи их комбинаций.5. Композиция по п. 1 или 2, в которой указанная эластомерная матрица включает эластомер, выбранный из группы, состоящей из: каучуковых материалов, которые помимо набухания в воде, также набухают в сырой нефти; каучуковых материалов, которые не ...

КАУЧУКОВАЯ КОМПОЗИЦИЯ И ШИНА

... 1. Каучуковая композиция, включающая (А) по меньшей мере один каучуковый компонент, выбранный из группы, состоящей из синтетического каучука и природного каучука; (В) полимер фарнезена; и (С) сажу, имеющую средний размер частиц от 5 до 100 нм, где содержание сажи (С) в каучуковой композиции составляет от 20 до 100 частей по массе в расчете на 100 частей по массе каучукового компонента (А).2. Каучуковая композиция по п. 1, где полимер (В) представляет собой гомополимер β-фарнезена.3. Каучуковая композиция по п. 1, где полимер (В) имеет вязкость расплава от 0,1 до 3000 Па·с, которая измерена при 38°С.4. Каучуковая композиция по п. 1, где полимер (В) имеет среднемассовую молекулярную массу, составляющую от 25000 до 500000.5. Каучуковая композиция по п. 1, где содержание полимера (В) в каучуковой композиции составляет от 0,1 до 100 частей по массе в расчете на 100 частей по массе каучукового компонента (А).6. Каучуковая композиция по п. 1, где синтетический каучук представляет собой по меньшей ...

КАРБАМИДСОДЕРЖАЩИЕ СИЛАНЫ, СПОСОБ ИХ ПОЛУЧЕНИЯ И ИХ ПРИМЕНЕНИЕ

СМЕСЬ НА ОСНОВЕ КАУЧУКА И АВТОМОБИЛЬНАЯ ШИНА

СТИРОЛ-БУТАДИЕНОВЫЙ КАУЧУК С ВЫСОКИМ СОДЕРЖАНИЕМ ЗВЕНЬЕВ СТИРОЛА И ВИНИЛА И УЗКИМ РАСПРЕДЕЛЕНИЕМ МОЛЕКУЛЯРНОГО ВЕСА И СПОСОБЫ ЕГО ПРИГОТОВЛЕНИЯ

... 1. Полимер, имеющий, по меньшей мере, следующие характеристики:(a) содержание блокового стирола, с количеством последовательных звеньев стирола более 4, от приблизительно 40 до приблизительно 70 весовых процентов от общего содержания стирола в полимере;(б) содержание винила от приблизительно 25 до приблизительно 80 весовых процентов от общего количества полимеризованного 1,3-диена;(в) содержание стирола от приблизительно 20 до приблизительно 75 весовых процентов от общего веса полимера; и(г) распределение молекулярного веса (Mw/Mn), равное или меньше 1,5.2. Полимер по п. 1, отличающийся тем, что имеет содержание блокового стирола, содержащего более 6 последовательных звеньев стирола, от приблизительно 5 до приблизительно 30 весовых процентов от общего содержания стирола в полимере, предпочтительно полимер имеет содержание блокового стирола, содержащего более 6 последовательных звеньев стирола, от приблизительно 19 до приблизительно 26 весовых процентов от общего содержания стирола в полимере ...

ОТВЕРЖДАЕМАЯ ПРОЗРАЧНАЯ КАУЧУКОВАЯ КОМПОЗИЦИЯ, ОТВЕРЖДЕННАЯ ПРОЗРАЧНАЯ КАУЧУКОВАЯ КОМПОЗИЦИЯ, ИЗГОТОВЛЕННАЯ ИЗ НЕЕ, И СПОСОБ ПРОИЗВОДСТВА

МОДИФИЦИРОВАННЫЕ ПОЛИМЕРНЫЕ КОМПОЗИЦИИ

... 1. Композиция, содержащая модифицированный полимер, включающая:по меньшей мере одну разветвленную модифицированную полимерную макромолекулу, содержащую по меньшей мере одну из структур (ib1), (ib2), (ib3) или (ib4); ипо меньшей мере одну линейную модифицированную полимерную макромолекулу, содержащую по меньшей мере одну из структур (iib1) или (iib2);где по меньшей мере одна разветвленная модифицированная полимерная макромолекула и по меньшей мере одна линейная модифицированная полимерная макромолекула каждая, независимо, дополнительно включает по меньшей мере одну аминогруппу, выбранную из группы, состоящей из:и их комбинаций;гдеN обозначает атом азота;С обозначает атом углерода;Н обозначает атом водорода;Е является по меньшей мере двухвалентным и выбран из группы, состоящей из: a) (C-C)-алкила, который может быть замещен одной или несколькими из следующих групп: аминогруппы, RRRSi- или RRRSi-аминогруппы; (С-C)-арила; (C-C)-аралкила; b) атома кислорода (О); c) атома серы (S); d) N-CHR-CR ...

Резиновая смесь и пневматическая шина

КАУЧУКОВАЯ КОМПОЗИЦИЯ, ВКЛЮЧАЮЩАЯ КРЕМНИЙОРГАНИЧЕСКИЙ СВЯЗУЮЩИЙ АГЕНТ

... 1. Каучуковая композиция, которую можно использовать для производства шин, основу которой составляют, по меньшей мере:- один диеновый эластомер;- одна сшивающая система на основе серы;- один неорганический наполнитель в качестве усиливающего наполнителя;- один связующий агент, имеющий приведенную ниже общую формулу I: в которой:- каждая из групп R, которые являются одинаковыми или различными, представляет собой одновалентную группу на углеводородной основе, выбранную из алкильных групп, которые являются линейными или разветвленными, циклоалкильных или арильных групп, содержащих от 1 до 18 атомов углерода;- Rпредставляет собой одновалентную группу на углеводородной основе, выбранную из алкильных групп, которые являются линейными или разветвленными, циклоалкильных или арильных групп, содержащих от 1 до 30 атомов углерода;- Z представляет собой двухвалентную соединительную группу, содержащую от 1 до 18 атомов углерода;- n представляет собой целое число, равное 0, 1 или 2; и- m представляет ...

ФУНКЦИОНАЛИЗИРОВАННЫЕ ПОЛИМЕРНЫЕ КОМПОЗИЦИИ

СТИРОЛ-БУТАДИЕНОВЫЙ КАУЧУК, ХАРАКТЕРИЗУЮЩИЙСЯ НОВЫМ ВКЛЮЧЕНИЕМ СТИРОЛА

... 1. Композиция, содержащая стирол-бутадиеновый каучук, где стирол-бутадиеновый каучук до какой-либо вулканизации характеризуется одним или несколькими критериями из следующих далее:(а) две и более части в одной полимерной цепи, которые несовместимы друг с другом; или(b) две и более температуры стеклования, которые разнятся, по меньшей мере, приблизительно на 6°С; или(с) два и более значения δ(СБК), которые различаются, по меньшей мере, более, чем приблизительно на 0,65 (Дж/см); или(d) две и более части, которые разнятся по уровню содержания стирола, по меньшей мере, приблизительно на 20 мас.% процентов в расчете на совокупную массу каждой части;где стирол-бутадиеновый каучук содержит, по меньшей мере, часть, которая совместима со вторым каучуком, и часть, которая несовместима с упомянутым тем же самым вторым каучуком.2. Композиция по п. 1, где стирол-бутадиеновый каучук характеризуется критерием (а) две и более части, которые несовместимы друг с другом.3. Композиция по п. 1, где стирол-бутадиеновый ...

СОДЕРЖАЩИЕ КРЕМНИЕВУЮ КИСЛОТУ РЕЗИНОВЫЕ СМЕСИ С СЕРОСОДЕРЖАЩИМИ ДОБАВКАМИ

... 1. Содержащая кремниевую кислоту резиновая смесь, получаемая по меньшей мере из одного каучука, серосодержащего алкоксисилана, сшивающего агента, наполнителя, при необходимости других вспомогательных ингредиентов резиновых смесей, отличающаяся тем, что она содержит от 0,1 до 15 масс.ч. в пересчете на 100 масс.ч. используемого каучука не содержащей кремния полисульфидной добавки формулы (I):в которой x означает 0, 1,2,3 или 4,остатки от Rдо Rодинаковые или разные и означают водород, алкил с 1-6 атомами углерода, циклоалкил с 5-6 атомами углерода, арил с 6-10 атомами углерода или группу -CH-OR, -CH-CH-OR, -NHR, -COR, -COOR, -CHCOORс R, означающим водород, алкил с 1-6 атомами углерода, циклоалкил с 5-6 атомами углерода, арил с 6-10 атомами углерода или ацил с 1-6 атомами углерода, остатки Rи Rодинаковые или разные и означают водород, алкил с 1-6 атомами углерода, циклоалкил с 5-6 атомами углерода, арил с 6-10 атомами углерода или группу -CH-OR, -CH-CH-OR, -NHR, -COR, -COOR, -CHCOORс R, означающим ...

РЕЗИНОВАЯ СМЕСЬ

... 1. Резиновая смесь, содержащая: (А) каучуковый компонент, содержащий 10% по массе или более по меньшей мере одного типа каучука, выбранного из синтезированного эмульсионной полимеризацией диенового каучука и натурального каучука, и 90% по массе или менее другого типа диенового каучука; (В) диоксид кремния, имеющий удельную площадь поверхности по адсорбции н-гексадецилтриметиламмоний бромида (СТАВ) составляющую не менее 180 м/г при определении методом, описанным в ASTM D3765-92; (С) по меньшей мере один силановый связывающий агент, выбранный из полисульфидного соединения и сложного тиоэфирного соединения; и (D) ускоритель вулканизации, причем резиновая смесь после вулканизации имеет среднюю площадь агрегированных агрегатов (нм) диоксида кремния, составляющую 1900 или менее, при этом метод измерения средней площади агрегированных агрегатов является следующим:верхнюю поверхность образца резиновой смеси после вулканизации разрезают сфокусированным ионным пучком в направлении, составляющем угол ...

РЕЗИНОВАЯ СМЕСЬ, СПОСОБ ЕЕ ПОЛУЧЕНИЯ И ВУЛКАНИЗИРОВАННАЯ РЕЗИНА, ПОЛУЧЕННАЯ ИЗ НЕЕ

... 1. Резиновая смесь, содержащая несшитый каучук и частицы каучука, имеющие сшитую структуру, диспергированные в нем, в которой частицы каучука, имеющие сшитую структуру, представляют собой частицы синтетического каучука и/или частицы натурального каучука со средним размером частиц от 20 до 500 нм и содержанием геля по меньшей мере 60% масс., а несшитый каучук представляет собой бутадиен-стирольный каучук, при этом массовое отношение частиц каучука, имеющих сшитую структуру, к несшитому каучуку составляет от 1:99 до 20:80.2. Резиновая смесь по п. 1, характеризующаяся тем, что частицы каучука, имеющие сшитую структуру, представляют собой одни или несколько из частиц каучука, выбранных из группы, состоящей из частиц натурального каучука, частиц стирол-бутадиенового каучука, частиц карбоксилированного стирол-бутадиенового каучука, частиц бутадиен-нитрильного каучука, частиц карбоксилированного бутадиен-нитрильного каучука, частиц хлоропренового каучука, частиц полибутадиенового каучука, частиц ...

РЕЗИНОВАЯ СМЕСЬ ДЛЯ ШИНЫ И ПНЕВМАТИЧЕСКАЯ ШИНА

... 1. Резиновая смесь для шины, включающая: ! каучуковый компонент, содержащий по меньшей мере один каучук, выбранный из группы, состоящей из натурального каучука, эпоксидированного натурального каучука и депротеинизированного натурального каучука; ! диоксид кремния; и ! силановое соединение, представленное общей формулой (1) ! ! где X представляет собой метокси- или этоксигруппу, Y представляет собой фенильную группу или линейную или разветвленную алкильную группу, а n является целым числом от 1 до 3. ! 2. Резиновая смесь для шины по п.1, применяемая для изготовления резины наполнителя борта шины, которая содержит: ! 60 или более мас.ч. диоксида кремния на 100 мас.ч. указанного каучукового компонента и ! от 4 до 16 мас.ч. силанового соединения, представленного вышеуказанной формулой (1), на 100 мас.ч. указанного каучукового компонента. ! 3. Резиновая смесь для шины по п.2, дополнительно включающая 5 мас.ч. или менее сажи на 100 мас.ч. указанного каучукового компонента. ! 4. Резиновая смесь ...

СПОСОБ ПОЛУЧЕНИЯ ПОЛИДИЕНОВ

... 1. Способ получения полидиена, включающий следующие стадии в указанном порядке:i) полимеризация одного или нескольких диеновых мономеров в присутствии каталитической композиции для получения реакционной смеси; причем каталитическая композиция содержит один или несколько из карбоксилата, алкилфосфата, алкилфосфита, алкоголята, амида и нециклического углеводородного соединения редкоземельного элемента с атомным номером от 57 до 71 в периодической таблице, и по крайней мере одно соединение-активатор или продукт реакции по меньшей мере одного активирующего соединения и карбоксилата, алкилфосфата, алкилфосфита, алкоголята, амида и/или нециклического углеводородного соединения редкоземельного элемента;ii) добавление к реакционной смеси одного или нескольких алкоксисилановых соединений, выбранных из соединений, представленных следующими формулами (A1), (A2), (А3), (А4) и (А5):((RO)(R)Si)(A1),где в формуле (A1): Si представляет собой кремний и O представляет собой кислород;s представляет собой ...

Полимерная композиция

Kautschukmischung für Laufflächen

KAUTSCHUKMISCHUNG

"WAERMEISOLIERMATERIAL UND VERFAHREN ZU SEINER HERSTELLUNG"

Kautschukmischung und Fahrzeugreifen

Die Erfindung betrifft eine schwefelvernetzbare Kautschukmischung, insbesondere für Laufstreifen von Fahrzeugreifen, und einen Fahrzeugreifen und ein Verfahren zur Herstellung der Kautschukmischung. Die Kautschukmischung enthält: – wenigstens einen Dienkautschuk und – 5,5 phr oder mehr eines oder mehrerer Prozesshilfsmittel A, wobei das Prozesshilfsmittel A ein Gemisch aus Zinkseifen von Fettsäuren ist.

Luftreifen mit einer Karkasse, einer elastomeren Innenschicht und einer elastomeren Verstärkungsschicht zwischen Karkasse und Innenschicht

Reifen mit einer Lauffläche aus einer cis 1,4-Polybutadienreichen Kautschukzusammensetzung, die ein funktionalisiertes Styren/Butadien Elastomer, Silica und ein Kupplungsmittel aufweist

REIFEN

Reifenkautschukzusammensetzung, vulkanisiertes Produkt und Verwendung des vulkanisierten Produkts in einem Luftreifen

Reifenkautschukzusammensetzung, umfassend 40 bis 180 Gewichtsteile Ruß mit einer spezifischen Stickstoffadsorptionsoberfläche von 80 bis 400 m/g und 1 bis 100 Gewichtsteile von aromatischem Copolymer vermischt mit 100 Gewichtsteilen Dien-Kautschuk,wobei der Dien-Kautschuk ein Styrol-Butadien-Kautschuk mit einem Gehalt an Styrol von 25 bis 50 Gew.-% und einem Vinylgehalt von 10 bis 75 Gew.-% ist,wobei das aromatische Copolymer ein Copolymer eines a-Methylstyrolderivats, dargestellt durch die allgemeine Formel (I) und Inden ist:, wobei in der Formel R eine Alkylgruppe mit 1 bis 3 Kohlenstoffen ist.

PNEUMATISCHER REIFEN MIT EINER LAUFFLAECHE AUS EINER MISCHUNG VON MEDIUM-VINYL-POLYBUTADIENKAUTSCHUK.

Reifenbauteil, das Styrol-Butadien-Kautschuk mit hohem Trans-Gehalt enthält

VERFAHREN ZUR HERSTELLUNG VON HOMOGENEN KAUTSCHUK/PVC-BELAEGEN IN FORM VON FLAECHENGEBILDEN

Durch Hitze vulkanisierbare Masse zur Herstellung elastischer Formkoerper und UEberzuege

OPAKES HOCHSCHLAGFESTES METHYLMETHACRYLAT-BUTADIEN-STYROL-POLYMER ZUR VERBESSERUNG DER SCHLAGFESTIGKEIT VON POLYVINYLCHLORID UND VERFAHREN ZU DESSEN HERSTELLUNG

Die vorliegende Erfindung gibt ein opakes hochschlagfestes Methylmethacrylat-Butadien-Styrol(MBS)-Polymer zur Verbesserung der Schlagfestigkeit von Polyvinylchlorid (PVC) und ein Herstellungsverfahren dafür an und gehört zum technischen Gebiet der Herstellung von PVC-Zusätzen. Das durch die vorliegende Erfindung angegebene MBS schließt, bezogen auf Masse, die folgenden Komponenten ein: 80-95 % Kernschicht;, 4-20 % Schalenschicht und 0,001-0,05 % Schutzkolloid, wobei die Kernschicht ein Polymer aus Butadien (B) und Styrol (S) ist; die Schalenschicht eines oder ein Copolymer aus zwei oder drei von S, Acrylat und Methylmethacrylat (MMA) ist; das Schutzkolloid eines oder eine Verbindung aus zwei oder drei von Polyvinylalkohol (PVA), Gelatine und Hydroxypropylmethylcellulose (HPMC) einschließt. Die vorliegende Erfindung löst die Probleme der geringen Schlagfestigkeit in dem heutigen MBS-Produkt und der schwierigen Koagulation oder Versprühung im Nachbehandlungsprozess.

Verbesserte Kautschukzusammensetzung

Kautschukmasse auf der Basis einer Mischung von Elastomeren

Thermoplastische Formmassen verbesserter mechanischer Eigenschaften und Flammwidrigkeit

Kautschukmischung

Die Erfindung betrifft eine Kautschukmischung, insbesondere für Fahrzeugluftreifen, Gurte, Riemen und Schläuche, die sich durch ein verbessertes Nassbremsverhalten, bei gleichzeitig ausreichendem Rollwiderstandsverhalten auszeichnet. Dazu ist die Kautschukmischung durch folgende Zusammensetzung gekennzeichnet: wenigstens einen Dienkautschuk und wenigstens einen mit OH-Gruppen modifizierten Polyether und wenigstens einen Füllstoff und weitere Zusatzstoffe.

GUMMIWERKSTOFF ZUR SCHALLISOLATION

Kieselgelhaltige Kautschukcompounds mit Organosilciumverbindungen als Compoundiermittel

Reifenlauffläche die Harze mit verschiedenen, definierten Erweichungspunkten enthält

THERMOPLASTISCHE MASSEN AUF BASIS VON POLYPHENYLENETHERN UND STYROL-BUTADIEN-EMULSIONSPOLYMERISATEN

ESTER FUNKTIONALISIERTE ELASTOMERE INTERPOLYMERE AUF BASIS VON C4-C7 ISOMONOOLEFINEN UND PARA-ALKYLSTYROL

Verfahren zum Vulkanisieren von russhaltigen Verschnittmischungen aus Naturkautschuk und Butylkautschuk

Kautschukzusammensetzung

Kautschukmischung für Lauffläche und Luftreifen mit dieser Mischung

Kieselsäuregefüllte Kautschukzusammensetzungen und ihre Herstellung

Laufflächenmasse

GUMMIVERBUNDSTOFF UND VERWENDUNGEN DAVON

Kautschuk-Zusammensetzung und deren Verwendung in Reifen

Reifenlauffläche enthaltend Kern-Hülle-Teilchen

POLYMERISATIONSVERFAHREN ZUR HERSTELLUNG VON BUTYLKAUTSCHUK-NANOVERBUNDWERKSTOFFEN

Method for producing modified conjugated diene based (co)polymer, modified conjugated diene based (co)polymer, and rubber composition

The method for producing a modified conjugated diene based (co)polymer, according to the present invention comprises a step of reacting a conjugated diene based (co)polymer with a metal halide compound to obtain a modified conjugated diene based (co)polymer, the conjugated diene based (co)polymer having a weight-average molecular weight of 150,000 to 2,000,000 and being obtained by bonding, to a polymer having at least a conjugated diene unit, an alkoxysilyl group and an optionally protected primary amino group. The method can satisfactorily produce a conjugated diene based (co)polymer which has a high Mooney viscosity, excellent shape stability and good processability.

Pneumatic tire

The invention is directed to a pneumatic tire having a rubber tread of a cap/base construction comprising an outer rubber tread cap layer containing an outer running surface and an underlying rubber tread base layer; wherein said tread cap layer comprises at least two circumferential, longitudinal rubber tread cap zones; wherein said tread cap zones individually extend from said tread cap running surface radially inward to said tread base layer; wherein said at least two tread cap zones comprises a first tread cap zone and a second tread cap zone adjacent to the first tread cap zone; the first tread cap zone and the second tread cap zone each independently comprising a vulcanizable rubber composition.

Elastomer composite blends, method and apparatus for producing same

A wet mix elastomer composite comprising carbon black dispersed in an elastomer including a blend of a natural rubber and styrene-butadiene rubber. When the wet mix elastomer composite is processed with CTV Method 1, the vulcanized wet mix elastomer composite exhibits a resistivity that A) has a natural logarithm satisfying the equation ln(resistivity)≧−0.1(loading)+x, where x is 14, or B) is at least 2.9 times greater than the resistivity of a vulcanized dry mix elastomer composite having the same composition and prepared using Comparative CTV Method 1.

Rubber composition for pneumatic tire tread for heavy load, and pneumatic tire for heavy load

A rubber composition for a pneumatic tire tread for heavy load, comprising a rubber component, and a carbon black, the carbon black satisfies (1) the carbon black has a dibutyl phthalate (DBP) absorption number of 90 to 180 mL/100 g, (2) the difference between the BET specific surface area (BET5) [unit: m 2 /g] of the carbon black and the external specific surface area (STSA) [unit: m 2 /g] thereof satisfies the following: 5<BET5−STSA<12, (3) the ratio between the Stokes diameter (Dst) of the carbon black and the Stokes diameter distribution (ΔD-50 (half band width)) thereof satisfies the following: 0.70<(ΔD-50)/Dst<1.10, and (4) the ratio between the BET specific surface area (BET5) [unit: m 2 /g] of the carbon black and the iodine adsorption number (IA) [unit: mg/g] thereof satisfies the following: 1.05<BET5/IA<1.35.

Process for producing modified conjugated diene-based polymer, modified conjugated diene-based polymer, and polymer composition

An object of the present invention is to provide a process for producing a modified conjugated diene-based polymer suitable for preparing a polymer composition excellent in the fuel cost saving effect. The present invention provides a process for producing a modified conjugated diene-based polymer, comprising reacting a conjugated diene-based polymer having a monomer unit based on a conjugated diene compound and a monomer unit based on a compound represented by the following formula (1), with an organometallic compound, and reacting the resulting reaction product with a hydrocarbyloxysilane compound: wherein R 11 , R 12 , R 13 , R 14 and R 15 each represent a hydrogen atom or an alkyl group, at least one of R 11 , R 12 , R 13 , R 14 and R 15 is an alkyl group, R 16 , R 17 and R 18 each represent a hydrogen atom or a hydrocarbyl group, R 19 represents a hydrocarbylene group, and k represents 0 or 1.

Mixtures composed of functionalized diene rubbers with trimethylolpropane and fatty acid, a process for production thereof and use thereof

The invention relates to functionalized diene rubbers with trimethylolpropane and fatty acid, to a process for production there of and use thereof for the production of wet-skid-resistant and low-rolling-resistance motor-vehicle tire treads with high abrasion resistance.

Method of producing modified conjugated diene rubber, modified conjugated diene rubber, and rubber composition

There is provided a method of producing a conjugated diene rubber capable of being used as a starting material for a crosslinked rubber that can be used in applications such as tire treads and can raise the fuel efficiency. This method of producing a conjugated diene rubber comprises (a) a step of reacting a first alkoxysilane compound having in a molecule at least one group convertible to onium by an onium generator and at least one alkoxysilyl group that has at least two alkoxy groups, with a conjugated diene polymer having an alkali metal or alkaline-earth metal active terminal and obtained by polymerizing a conjugated diene compound and an aromatic vinyl compound, thereby to obtain a modified conjugated diene polymer that has the group convertible to onium and the alkoxysilyl group, and (b) a step of mixing the resulting modified conjugated diene polymer with the onium generator and a second alkoxysilane compound having in a molecule at least one alkoxysilyl group and at least one group convertible to onium by the onium generator.

Elastomeric Compositions Comprising Reclaimed Vulcanized Elastomer Particles of Broad Size Distribution and Chemically Modified Vulcanized Elastomer Particles

Elastomer compositions comprising uncured elastomer and reclaimed elastomer are described. In one embodiment, the compositions comprise reclaimed elastomer material (micronized rubber powder) of broad particle size distribution, which is less expensive than traditional reclaimed elastomer material with narrow particle size distribution. Further, compositions comprising reclaimed elastomer materials with broad particle size distribution perform comparably to those comprising reclaimed elastomer materials with narrow particle size distribution. In other embodiments, the compositions comprise both vulcanized and devulcanized elastomer materials. Advantageously, by using a combination of vulcanized and devulcanized material, it is possible to incorporate a greater percentage by weight of reclaimed material in to an elastomer composition, thus providing additional cost savings while maintaining high levels of mechanical properties. Further, the use of the reclaimed material reduces landfill waste resulting in a more environmentally friendly product.

RUBBER COMPOSITION AND PNEUMATIC TIRE

The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): 2. The rubber composition according to claim 1 ,{'sup': 1', '2, 'sub': '1-6', 'wherein the Rand Rin the formula (Ia) are Chydrocarbyl groups.'}3. The rubber composition according to claim 1 ,{'sup': 1', '2', '3, 'wherein two of the X, X, and Xin the formula (I) are selected from the group consisting of a group represented by the formula (Ia) and a hydroxyl group.'}5. The rubber composition according to claim 1 ,wherein the conjugated diene polymer has a vinyl bond content of at least 10 mol % but not more than 80 mol %, based on 100 mol % of the constituent unit derived from a conjugated diene.6. The rubber composition according to claim 1 , comprising at least one of natural rubber and butadiene rubber.7. The rubber composition according to claim 1 ,{'sup': '2', 'wherein the silica has a nitrogen adsorption specific surface area of 40 to 400 m/g.'}8. The rubber composition according to claim 1 , which is for use as a rubber composition for a tread.9. A pneumatic tire claim 1 , formed from the rubber composition according to . The present invention relates to a rubber composition and a pneumatic tire formed from the rubber composition.The demands on automobiles for better fuel economy have been increasing in recent years as concern with environmental issues has been rising. Hence, better fuel economy is also required of rubber compositions used for automotive tires. For ...

MODIFIED CONJUGATED DIENE RUBBER, METHOD FOR PRODUCING SAME, AND RUBBER COMPOSITION

By a method comprising a process including (a) producing a modified conjugated diene polymer through reaction of a conjugated diene polymer having an alkali metal or alkaline-earth metal active terminal with a first alkoxysilane compound which has both an alkoxysilyl group and at least one group convertible into an onium, and (b) mixing the modified conjugated diene polymer, an agent for producing onium, a second alkoxysilane compound having an alkoxysilyl group and at least one group convertible into an onium and a condensation catalyst containing metal element(s) for alkoxysilane compounds, conjugated diene rubber usable as a starting material of cross-linked rubber which is used for a tire tread or the like and allows enhancement of low fuel consumption property can be obtained. 1. A method of producing a modified conjugated diene rubber , the method comprising:mixing i) a modified conjugated diene polymer comprising a group convertible into an onium and an alkoxysilyl group, ii) an agent that produces onium, iii) a second alkoxysilane compound comprising an alkoxysilyl group and at a group which is convertible into an onium with the agent for per molecule, and iv) a condensation catalyst comprising a metal element for alkoxysilane compounds, to obtain a mixture.2. The method of claim 1 , wherein the modified conjugated diene polymer is produced by reacting:a conjugated diene polymer comprising an alkali metal or alkaline-earth metal active terminal, which is a polymer produced by polymerizing a conjugated diene compound or a conjugated diene compound with an aromatic vinyl compound; anda first alkoxysilane compound comprising both of an alkoxysilyl group comprising two or more alkoxy groups and a group which is convertible into an onium with the agent per molecule.3. The method of claim 2 , wherein the group convertible into an onium in the first alkoxysilane compound is at least one group selected from the group consisting of a nitrogen-comprising group formed ...

Rubber composition and pneumatic tire

The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound containing a group represented by the following formula (II): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.

Rubber composition and pneumatic tire

The present invention provides a rubber composition that achieves a well-balanced improvement in fuel economy, wet-grip performance, and abrasion resistance, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition, including a rubber component and silica, wherein the rubber component contains not less than 5% by mass of a conjugated diene polymer, based on 100% by mass of the rubber component, the conjugated diene polymer containing a constituent unit derived from a conjugated diene and a constituent unit represented by the following formula (I): at least one terminal of the conjugated diene polymer being modified by a compound containing a group represented by the following formula (II): and wherein the silica is contained in an amount of 5 to 150 parts by mass per 100 parts by mass of the rubber component.

HYDROXYL GROUP-CONTAINING METHYLSTYRENE AND POLYMERS INCORPORATING SAME

Vulcanizates with desirable properties can be obtained from compounds incorporating polymers that include hydroxyl group-containing α-methylstyrene functionalities. The functionalities can be incorporated by using any or all of appropriate initiators, monomers and optional terminating compounds. Such polymers exhibit excellent interactivity with both conventional and non-conventional fillers. 2. A method of using the compound of comprising incorporating said compound into a carbanionic polymer.3. (canceled)4. The method of wherein said polymer comprises polyene mer.5. (canceled)8. The process of wherein said at least one type of polyene is polymerized before said compound is polymerized.9. The process of further comprising hydrolyzing each of said protecting groups so as to provide hydroxyl groups.11. A rubber composition comprising at least one type of particulate filler and the functionalized polymer of .12. The rubber composition of further comprising a vulcanizing agent.13. (canceled)14. A vulcanizate provided from the rubber composition of .15. (canceled)16. The compound of wherein m is 2.17. The method of wherein m is 2.18. The method of wherein m is 2.19. The functionalized polymer of wherein m is 2.20. The process of wherein m is 2.21. The process of further comprising hydrolyzing each of said protecting groups so as to provide hydroxyl groups.22. The process of wherein m is 2.23. The rubber composition of wherein said at least one type of particulate filler comprises carbon black and claim 11 , optionally claim 11 , silica.24. A vulcanizate provided from the rubber composition of . This international application claims the benefit of U.S. provisional patent application No. 61/349,947, filed 31 May 2010.Rubber goods such as tire treads often are made from elastomeric compositions that contain one or more reinforcing materials such as, for example, particulate carbon black and silica; see, e.g., 13th ed. (1990), pp. 603-04.Good traction and resistance to ...

TIRE TREAD FOR HIGH PERFORMANCE TIRES

Tires having treads constructed of a material that is based upon a cross-linkable rubber composition, the rubber composition in some embodiments including between 25 phr and 5.0 phr of a butadiene rubber and between 50 phr and 75 phr of a styrene-butadiene rubber (SBR). wherein the butadiene portion of the SBR has at least 50% vinyl content. The rubber composition may further include between 25 phr and 60 phr of a plasticizing resin having a glass transition temperature Tg of between 30° C. and 120° C. and between 25 phr 60 phr of a vegetable oil. The ratio of the vegetable oil phr to the high Tg resin phr may, in some embodiments, be between 0.75 and 3. Further, such rubber compositions may also be reinforced with between 100 phr and 200 phr of a silica filler. 1. A tire , the tire comprising a tread constructed of a material that is based upon a cross-linkable rubber composition , the cross-linkable rubber composition comprising , per 100 parts by weight of rubber (phr):between 25 phr and 50 phr of a butadiene rubber;between 50 phr and 75 phr of a styrene-butadiene rubber (SBR), wherein a butadiene portion of the SBR has at least 50% vinyl content;25 phr and 60 phr of a plasticizing resin having a glass transition temperature Tg of between 30° C. and 120° C.;between 25 phr 60 phr of a vegetable oil; andbetween 100 phr and 200 phr of a silica filler.2. The tire of claim 1 , wherein the butadiene portion of the SBR has between 55% and 65% vinyl content.3. The tire of claim 1 , wherein the rubber composition comprises between 30 phr and 45 phr of the butadiene rubber and between 55 phr and 70 phr of the SBR.4. The tire of claim 3 , wherein the butadiene portion of the SBR has between 55% and 65% vinyl content.5. The tire of claim 1 , wherein the resin has a number average molecular weight of between 400 and 2000 g/mol and a polydispersity index of less than 3.6. The tire of claim 1 , wherein the resin has a Tg of between 45° C. and 85° C.7. The tire of claim 1 , ...

RUBBER COMPOSITION COMPRISING A THERMOPLASTIC FILLER AND COMPATIBILIZER

A rubber composition, which can be used for manufacturing tyres, is based on one or more diene elastomers, on one or more reinforcing fillers, and on a crosslinking system. The rubber composition includes particles of one or more thermoplastic materials chosen from thermoplastic materials with melting or softening points varying from 80° C. to 300° C. The rubber composition also includes one or more compatibilizing agents chosen from block copolymers that includes at least one diene elastomer block and at least one thermoplastic block compatible with the one or more thermoplastic materials. 125-. (canceled)26. A rubber composition used in manufacturing tyres , the rubber composition comprising:one or more diene elastomers;one or more reinforcing fillers;a crosslinking system;particles of one or more thermoplastic materials chosen from thermoplastic materials with melting or softening points varying from 80° C. to 300° C.; andone or more compatibilizing agents chosen from block copolymers that include at least one diene elastomer block and at least one thermoplastic block compatible with the one or more thermoplastic materials.27. The rubber composition according to claim 26 , wherein the one or more thermoplastic materials is or are chosen from a group that includes: polypropylenes claim 26 , polyethylenes claim 26 , polystyrenes claim 26 , acrylonitrile/butadiene/styrene copolymers claim 26 , polyacrylates claim 26 , polyamides claim 26 , polyphenylene ethers claim 26 , polycarbonates claim 26 , polyacetals claim 26 , thermoplastic polyurethanes claim 26 , thermoplastic fluoropolymers claim 26 , and polyesters.28. The rubber composition according to claim 27 , wherein the polyesters are chosen from a group that includes: polyethylene terephthalates claim 27 , polybutylene terephthalates claim 27 , and polyethylene naphthoates.29. The rubber composition according to claim 27 , wherein the fluoropolymers are chosen from a group that includes: copolymers of ...

Rubber composition containing a modifed elastomer, method for preparing same, and tire containing same

The invention relates to a rubber composition based on at least one diene elastomer, a reinforcing filler, a chemical crosslinker and a modifier selected from compounds comprising at least one group Q, and at least one group A, which are joined to one another by at least one and preferably one spacer group Sp, wherein: Q comprises a dipole containing at least one and preferably one nitrogen atom, A comprises an associative group comprising at least one nitrogen atom, Sp is an atom or group of atoms forming a bond between Q and A. This composition has an improved balance between stiffness under moderate deformations/elongation at break and improved hysteresis properties and is therefore especially suited to the manufacture of tyres for enhancing the trade off between rolling resistance and resistance to large deformations.

Surface protection film

A surface protection film has moderate adhesive properties for bonding to adherend bodies with a rough surface, a rear surface with good slipping properties, and blocking resistance and good unwinding properties. The surface protection film has a laminated structure formed at least of an adhesive layer and a back layer, wherein the adhesive layer is formed mainly of a styrene-based elastomer while the back layer is formed mainly of a propylene-based resin containing 0.5 wt % to 10 wt % of a fluorine-containing compound having a polyfluorohydrocarbon group and a polyoxy ethylene group.

RUBBER COMPOSITION FOR BAND TOPPING, RUBBER COMPOSITION FOR BREAKER EDGE STRIP, AND PNEUMATIC TIRE

Rubber compositions excellent in durability are disclosed, as well as a pneumatic tire including a band and/or a breaker edge strip formed from the rubber compositions. A rubber composition for a band topping includes, per 100 parts by mass a rubber component containing not less than 50% by mass of an isoprene-based rubber, predetermined amounts of sulfur, a compound such as resorcinol resins, a compound such as partial condensates of hexamethoxymethylol melamine, silica, and a carbon black having a nitrogen adsorption specific surface area of 38 to 125 m/g. A rubber composition for a breaker edge strip includes, per 100 parts by mass of a rubber component containing not less than 50% by mass of an isoprene-based rubber, predetermined amounts of sulfur, a compound such as resorcinol resins, a compound such as partial condensates of hexamethoxymethylol melamine, and a cobalt salt of an organic acid. 1. A rubber composition for a band topping , comprising , per 100 parts by mass of a rubber component containing not less than 50% by mass of an isoprene-based rubber ,1.5 to 2.9 parts by mass of sulfur,1 to 3 parts by mass of at least one first compound selected from the group consisting of resorcinol resins, modified resorcinol resins, cresol resins, modified cresol resins, phenolic resins, and modified phenolic resins,0.7 to 3 parts by mass of at least one second compound selected from the group consisting of partial condensates of hexamethoxymethylol melamine and partial condensates of hexamethylol melamine pentamethyl ether,5 to 17 parts by mass of silica, and{'sup': '2', '10 to 55 parts by mass of a carbon black having a nitrogen adsorption specific surface area of 38 to 125 m/g.'}2. The rubber composition for a band topping according to claim 1 ,wherein the rubber component contains styrene-butadiene rubber.3. A rubber composition for a breaker edge strip claim 1 , comprising claim 1 , per 100 parts by mass of a rubber component containing not less than 50% by mass ...

RESIN BLEND

Provided are a resin blend for melt processing, a pellet and a method of preparing a resin article using the same. The resin blend may include a first resin, and a second resin having a difference in melt viscosity from the first resin of 0.1 to 3000 pa*s at a shear rate of 100 to 1000 sand a processing temperature of the resin blend. The resin blend can improve mechanical and surface characteristics of a resin article. Further, since coating or plating is not required for manufacturing a resin article, a manufacturing time and/or cost can be reduced, and productivity can be increased. 1. A resin blend for melt processing , comprising:a first resin; and{'sup': '−1', 'a second resin having a difference in melt viscosity from the first resin of 0.1 to 3000 pa*s at a shear rate of 100 to 1000 sand a processing temperature of the resin blend.'}2. The resin blend according to claim 1 , wherein the second resin has a molecular weight distribution of 1 to 2.5.3. The resin blend according to claim 1 , wherein the second resin has a weight average molecular weight of 30 claim 1 ,000 to 200 claim 1 ,000.4. The resin blend according to claim 1 , wherein the first resin includes at least one selected from the group consisting of a styrene-based resin claim 1 , a polyolefin-based resin claim 1 , a thermoplastic elastomer claim 1 , a polyoxyalkylene-based resin claim 1 , a polyester-based resin claim 1 , a polyvinyl chloride-based resin claim 1 , a polycarbonate-based resin claim 1 , a polyphenylene sulfide-based resin claim 1 , a vinyl alcohol-based resin claim 1 , an acrylate-based resin claim 1 , engineering plastics and a copolymer thereof.5. The resin blend according to claim 1 , wherein the second resin includes at least one selected from the group consisting of an anti-wear resin claim 1 , an anti-contamination resin claim 1 , an anti-fingerprint resin claim 1 , a colored resin claim 1 , a pearl resin claim 1 , a high-gloss resin claim 1 , a non-gloss resin and a barrier ...

Tire of which the Tread Comprises a Thermoplastic Vulcanizate (TPV) Elastomer

A tire, the tread of which comprises a rubber composition comprising at least a diene elastomer, such as, for example, an SBR or BR elastomer, a thermoplastic elastomer vulcanizate of EPDM and polypropylene, at a content preferably of greater than 5 phr, and a reinforcing filler, such as silica and/or carbon black. Such a composition confers, on the tire, an improvement in the wet grip.

LOW ROLLING RESISTANCE TREAD FOR CARS AND LIGHT TRUCKS

Tires, especially tires for passenger and light track vehicles, that have treads constructed of a silica reinforced material that is based upon a cross-linkable rubber composition that includes, per hundred parts by weight of rubber (phr), between 50 phr and 90 phr of natural rubber and between 10 phr and 50 phr of a silanol end-functionalized styrene-butadiene rubber and may include between 5 phr and 40 phr of a plasticizing resin. The plasticizing resin may be characterized as having a glass transition temperature Tg of between 30° C. and 120° C. or alternatively, between 45° C. and 85° C. The plasticizing resin may be a polylimonene resin. Tires manufactured with such treads may be characterized as having improved rolling resistance with no loss in wet or dry grip properties. 1. A tire , the tire comprising a tread constructed of a material that is based upon a cross-linkable rubber composition , the cross-linkable rubber composition comprising , per 100 parts by weight of rubber (phr);between 50 phr and 90 phr; of natural rubber;between 10 phr and 50 phr; of a silanol end-functionalized styrene-butadiene rubber;between 5 phr and 40 phr; of a plasticizing resin having a glass transition temperature Tg of between 30° C. and 120° C.; andbetween 40 phr and 75 phr of a silica filler.2. The tire of claim 1 , wherein the rubber composition comprises between 65 phr and 85 phr of the natural rubber and between 15 phr and 35 phr of the silanol end-functionalized styrene butadiene rubber.3. The tire of claim 1 , wherein the styrene-butadiene rubber has a glass transition temperature of between −50° C. and −10° C.4. The tire of claim 1 , wherein the styrene-butadiene rubber has a glass transition temperature of between −30° C. and −20° C.5. The tire of claim 1 , wherein the styrene-butadiene rubber has a vinyl content of the butadiene part of between 25% and 70%.6. The tire of claim 1 , wherein the resin has a number average molecular weight of between 400 and 2000 g/mol ...

RUBBER COMPOSITION FOR TIRES AND PNEUMATIC TIRE

A rubber composition for tires contains a diene rubber, silica, a sulfur-containing silane coupling agent and a triethoxysilane containing an alkyl group having a prescribed number of carbon atoms, wherein 50 mass % or more of the aforementioned diene rubber is a styrene-butadiene copolymer rubber, the aforementioned sulfur-containing silane coupling agent has a mercapto group, the content of the aforementioned silica is from 5 to 150 parts by mass per 100 parts by mass of the aforementioned diene rubber, the content of the aforementioned sulfur-containing silane coupling agent is from 3 to 15 mass % relative to the content of the aforementioned silica, and the content of the aforementioned alkyltriethoxysilane is from 0.1 to 20 mass % relative to the content of the aforementioned silica. 2. The rubber composition for tires according to claim 1 , wherein a CTAB adsorption specific surface area of the silica is greater than 160 m/g.3. The rubber composition for tires according to claim 1 , wherein a weight-average molecular weight of the styrene-butadiene rubber is from 900 claim 1 ,000 to 2 claim 1 ,000 claim 1 ,000.4. A pneumatic tire that uses the rubber composition according to .5. The rubber composition for tires according to claim 2 , wherein a weight-average molecular weight of the styrene-butadiene rubber is from 900 claim 2 ,000 to 2 claim 2 ,000 claim 2 ,000.6. A pneumatic tire that uses the rubber composition according to .7. A pneumatic tire that uses the rubber composition according to .8. A pneumatic tire that uses the rubber composition according to .9. The rubber composition for tires according to claim 1 , wherein the styrene-butadiene rubber contains from 30 to 50 mass % of an aromatic vinyl and has a vinyl bond content in a conjugated diene of from 30 to 65 mass %.10. The rubber composition for tires according to claim 1 , wherein the alkyl group having 7 to 20 carbon atoms is an octyl group or a nonyl group.11. A pneumatic tire that uses the ...

RUBBER COMPOSITION, METHOD FOR PREVENTING DISCOLORATION OF RUBBER COMPOSITION, AND TIRE

Provided is a rubber composition capable of preventing discoloration due to an amine-based antiaging agent and wax without deteriorating the ozone resistance not only in cases where the rubber composition is used in side wall portions of tires but also in cases where the rubber composition is used in tread portions of tires. The rubber composition comprises at least one rubber component selected from a dienic synthetic rubber and a natural rubber and, as incorporated therein, at least one nonionic surfactant selected from specific compounds. 1. A rubber composition comprising at least one rubber component selected from a dienic synthetic rubber and a natural rubber and , as incorporated therein , at least one nonionic surfactant selected from the compounds represented by the following formula (I):{'br': None, '[Chem. 1]'}{'br': None, 'sup': 2', '1, 'sub': 'n', 'RO(RO)H \u2003\u2003(I)'}{'sup': 2', '1, '[in the formula (I), Rrepresents an alkyl group or an alkenyl group having from 1 to 15 carbon atoms, and the alkyl group and the alkenyl group may be any of linear chain-like, branched chain-like or cyclic ones; Rrepresents an alkylene group having from 2 to 4 carbon atoms; n indicates a mean addition molar number, and is from 16 to 30].'}2. The rubber composition according to claim 1 , which contains wax as incorporated therein.3. The rubber composition according to claim 1 , which contains an antiaging agent as incorporated therein.4. The rubber composition according to claim 3 , wherein the antiaging agent is an amine-based antiaging agent.5. The rubber composition according to claim 1 , wherein the nonionic surfactant is incorporated in an amount of from 0.1 to 10 parts by mass relative to 100 parts by mass of the rubber component therein.6. The rubber composition according to claim 1 , which contains claim 1 , as the rubber component claim 1 , at least one selected from a natural rubber claim 1 , an isoprene rubber claim 1 , a styrene-butadiene copolymer rubber ...

MODIFIED POLYMER COMPOSITIONS

The invention provides a first composition comprising at least the following: i) a modified polymer comprising at least one branched modified polymer macromolecule (b1) and at least one linear modified polymer macromolecule (a1), and wherein the at least one branched modified polymer macromolecule and the at least one linear modified polymer macromolecule each, independently, comprises at least one amine group selected from the group consisting of formulas (1A-1F), each as described above: and combinations thereof; and wherein the at least one branched modified polymer macromolecule further comprises one of the structures (ib1-ib4) as described above, and the at least one linear modified polymer macromolecule further comprises one of the structures (iib1) as described above (see Formula 3A) 2. The composition of claim 1 , wherein the amine group is selected from the group consisting of Formula 1D claim 1 , Formula 1E claim 1 , and Formula 1F.3. The composition of claim 2 , wherein E is selected from the group consisting of (i) a (C-C) alkyl which is substituted with an amine group which is a tertiary amine claim 2 , RRRSi— or RRRSi-amine group claim 2 , (C-C) aryl claim 2 , (C-C) aralkyl; (ii) tertiary amine group; (iii)RRRSiN group; (iv) an oxygen atom (O); (v) a sulfur atom (S); (vi) N—CHR—CR═CR; (vii) N—CHR—C═CHR; (viii) N—CR—CR═CHR; (ix) N—CHR—CR═CHR; and (x) H—N group.4. The composition of claim 2 , wherein E is a (C-C) alkyl which is substituted with a tertiary amine group or a RRRSiN group.5. The composition of claim 2 , wherein E is an oxygen atom (O) or a sulfur atom (S).6. The composition of claim 2 , wherein E is N—CHR—CR═CR claim 2 , N—CHR—C═CHR claim 2 , N—CR—CR═CHRor N—CHR—CR═CHR.7. The composition of claim 2 , wherein E is an H—N group or a RRRSiN group.8. The composition of claim 1 , wherein the amine group is selected from the group consisting of Formula 1A claim 1 , Formula 1B claim 1 , or Formula 1C;a is 2;b is 0; and{'sup': 6', '45', '46', '47, ' ...

Tire the Tread of which Comprises a Thermoplastic Elastomer

A tire whose tread comprises a rubber composition comprising at least one diene elastomer, for instance an SBR, a reinforcing filler, for instance a silica, and a polyether block amide (PEBA) thermoplastic elastomer. Such a composition has a reduced raw-state viscosity, thus promoting the processability of the treads, while at the same time conserving a good level of dry road holding and of rolling resistance. 1. A tire having a tread that comprises a rubber composition comprising at least one diene elastomer , a reinforcing filler and a polyether block amide thermoplastic elastomer.2. The tire according to claim 1 , wherein the diene elastomer is chosen from the group consisting of polybutadienes claim 1 , synthetic polyisoprenes claim 1 , natural rubber claim 1 , butadiene copolymers claim 1 , isoprene copolymers and mixtures of these elastomers.3. The tire according to claim 1 , wherein the content of polyether block amide thermoplastic elastomer is greater than 5 pce and more preferentially in a range from 10 to 50 pce.4. The tire according to claim 1 , further comprising a plasticizer.5. The tire according to claim 4 , wherein the plasticizer content is greater than 10 pce.6. The tire according to claim 4 , wherein the plasticizer is a thermoplastic hydrocarbon-based resin that has a glass transition temperature greater than 0° C.7. The tire according to claim 6 , wherein the thermoplastic hydrocarbon-based resin is chosen from the group consisting of cyclopentadiene (abbreviated as CPD) or dicyclopentadiene (abbreviated as DPCD) homopolymer or copolymer resins claim 6 , terpene homopolymer or copolymer resins claim 6 , terpene phenol homopolymer or copolymer resins claim 6 , CS fraction homopolymer or copolymer resins claim 6 , C9 fraction homopolymer or copolymer resins claim 6 , α-methylstyrene homopolymer or copolymer resins claim 6 , and mixtures of these resins.8. The tire according to claim 4 , wherein the plasticizer is liquid at 20° C. and has a glass ...

TIRE, THE TREAD OF WHICH COMPRISES A RUBBER COMPOSITION A POLYVINYL ESTER RESIN

A tire, the tread of which comprises a rubber composition comprising a diene elastomer, such as, for example, an SBR or BR elastomer, a poly(vinyl ester) resin, at a content preferably of between 5 and 50 phr, and a reinforcing filler, such as silica and/or carbon black. The poly(vinyl ester) resin is in particular a vinyl ester homopolymer or copolymer of foimula R—C(═O)O—CH═CH2, at least one of the vinyl ester monomers of which comprises a radical R having more than 2 carbon atoms, preferably from 4 to 20 carbon atoms. Such a composition makes it possible to improve the wet grip of the treads of the tire and also the processability of such a composition. 1. A tire the tread of which comprises a rubber composition comprising at least a diene elastomer , a poly(vinyl ester) resin , the glass transition temperature of which is less than 0° C. , and a reinforcing filler.2. The tire according to claim 1 , wherein the diene elastomer is chosen from the group consisting of polybutadienes claim 1 , synthetic polyisoprenes claim 1 , natural rubber claim 1 , butadiene copolymers claim 1 , isoprene copolymers and the mixtures of these elastomers.3. The tire according to claim 1 , wherein the content of poly(vinyl ester) resin is between 5 and 50 phr.4. The tire according to claim 3 , wherein the content of poly(vinyl ester) resin is between 10 and 40 phr.5. The tire according to claim 1 , wherein the poly(vinyl ester) resin is a homopolymer of a vinyl ester monomer of formula R—C(═O)O—CH═CH2 claim 1 , where R is an alkyl radical having more than 3 carbon atoms.6. The tire according to claim 5 , wherein R is an alkyl radical having from 4 to 20 carbon atoms.7. The tire according to claim 5 , wherein the poly(vinyl ester) resin is a homopolymer chosen from the group consisting of poly(vinyl butyrate) claim 5 , poly(vinyl pentanoate) claim 5 , poly(vinyl hexanoate) claim 5 , poly(vinyl 2-ethylhexanoate) claim 5 , poly(vinyl decanoate) claim 5 , poly(vinyl laurate) claim 5 , ...

METHOD FOR MANUFACTURING RUBBER COMPOSITION

A method for producing a rubber composition containing a rubber component (A) of at least one selected from natural rubbers and synthetic dienic rubbers, a filler containing an inorganic filler (B), and a silane coupling agent (C) of a compound having a mercapto group, wherein the rubber composition is kneaded in multiple stages, in the first stage of kneading, the rubber component (A), all or a part of the inorganic filler (B), and all or a part of the silane coupling agent (C) are kneaded, then in the first stage or in the subsequent kneading stage, at least one compound selected from an acidic compound (D) and a basic compound (E) is added, and the highest temperature of the rubber composition in the final stage of kneading is from 60 to 120° C. 1. A method for producing a rubber composition containing a rubber component (A) of at least one selected from natural rubbers and synthetic dienic rubbers , a filler containing an inorganic filler (B) , and a silane coupling agent (C) of a compound having a mercapto group , wherein the rubber composition is kneaded in multiple stages , in the first stage of kneading , the rubber component (A) , all or a part of the inorganic filler (B) , and all or a part of the silane coupling agent (C) are kneaded , then in the first stage or in the subsequent kneading stage , at least one compound selected from an acidic compound (D) and a basic compound (E) is added , and the highest temperature of the rubber composition in the final stage of kneading is from 60 to 120° C.3. The method for producing a rubber composition according to claim 1 , wherein the acidic compound (D) is added in the kneading stage after the first stage of kneading.4. The method for producing a rubber composition according to claim 1 , wherein the basic compound (E) is added in the kneading stage after the first stage of kneading.5. The method for producing a rubber composition according to claim 1 , wherein the acidic compound (D) and the basic compound (E) ...

RUBBER COMPOSITION THAT CAN BE USED FOR MANUFACTURING A TYRE OF WHICH THE COMPOSITION COMPRISES A STARCH AND AN AQUEOUS OR WATER-SOLUBLE PLASTICIZER

A rubber composition based on a diene elastomer, a crosslinking system, and a reinforcing filler is provided, as well as a process for obtaining the composition. The composition includes a starch in a proportion of from 10 to 50 phr (parts by weight per hundred parts of elastomer) and an aqueous or water-soluble plasticizer in a proportion of from 3 to 30 phr. The aqueous or water-soluble plasticizer is water or a mixture of water and glycerol, in which the water is predominant by weight in the aqueous or water-soluble plasticizer. The composition can be used for preparing calendered or profiled tyre-related products, such as a tyre tread, for example. 119-. (canceled)20. A rubber composition comprising:a diene elastomer;a crosslinking system;a reinforcing filler;a starch in a proportion of from 10 to 50 phr (parts by weight per hundred parts of elastomer); andan aqueous or water-soluble plasticizer in a proportion of from 3 to 30 phr,wherein the aqueous or water-soluble plasticizer is water or a mixture of water and glycerol, in which the water in the mixture is predominant by weight in the aqueous or water-soluble plasticizer.21. The rubber composition according to claim 20 , wherein the proportion of the starch ranges from 15 to 40 phr.22. The rubber composition according to claim 20 , wherein the proportion of the aqueous or water-soluble plasticizer ranges from 7 to 28 phr.23. The rubber composition according to claim 20 , wherein the starch includes a minimum of 10% of amylose.24. The rubber composition according to claim 23 , wherein the starch includes a minimum of 15% of amylose.25. The rubber composition according to claim 24 , wherein the starch includes a minimum of 20% of amylose.26. The rubber composition according to claim 20 , wherein the aqueous or water-soluble plasticizer is water.27. The rubber composition according to claim 20 , wherein reinforcing filler includes predominantly carbon black.28. The rubber composition according to claim 20 , ...

RUBBER COMPOSITIONS INCLUDING A FUNCTIONALIZED WAX

Disclosed herein are rubber compositions suitable for use in tire treads comprising (a) at least one conjugated diene polymer or copolymer; (b) at least one filler; (c) a curative package; and (d) at least one of: (i) from 0.2 to 10 phr of at least one halogenated hydrocarbon wax, or (ii) from 0.2 to 10 phr of at least one silicone-containing wax comprising a functionalized polyalkylsiloxane, a functionalized polyalkylsilsesquioxane resin, or combinations thereof. In certain embodiments, the at least one halogenated hydrocarbon wax is a chlorinated hydrocarbon or a fluorinated hydrocarbon wax. 1. A rubber composition suitable for use in a tire tread , comprising:(a) at least one conjugated diene-containing polymer or copolymer comprising at least one conjugated diene monomer and optionally at least one vinyl-containing monomer;(b) at least one filler in an amount of 5 to 200 phr wherein at least a majority of the filler is carbon black or silica;(c) a curative package; and (i) from 0.2 to 10 phr of at least one halogenated hydrocarbon wax, or', '(ii) from 0.2 to 10 phr of at least one silicone-containing wax comprising a functionalized polyalkylsiloxane, a functionalized polyalkylsilsesquioxane resin, or combinations thereof., '(d) at least one of2. The composition of claim 1 , wherein the at least one halogenated hydrocarbon wax of (d) is at least one fluorinated hydrocarbon wax in an amount of 0.5 to 5 phr.3. The composition of claim 1 , wherein (d) is at least one silicone-containing wax in an amount of 0.5 to 5 phr.4. The composition of claim 1 , wherein the at least one halogenated hydrocarbon wax of (d) is at least one chlorinated hydrocarbon wax in an amount of 0.5 to 5 phr.5. The composition of claim 1 , wherein the at least one halogenated hydrocarbon wax of (d) is at least one fluorinated hydrocarbon wax comprising 0.2% to 70% by weight fluorine based on the total weight of the wax.6. The composition of claim 1 , wherein the at least one halogenated ...

RUBBER COMPOSITION FOR TIRE TREAD

A rubber composition for a tire tread contains styrene-butadiene rubber in a compounding amount of 100 parts by weight, silica in a compounding amount of 90 to 170 parts by weight, and an aromatic modified terpene resin in a compounding amount of 10 to 30 parts by weight. The styrene-butadiene rubber contains 40 to 100% by weight of solution-polymerized styrene-butadiene rubber (S-SBR1) and 60 to 0% by weight of solution-polymerized styrene-butadiene rubber (S-SBR2), the total content thereof being 100% by weight. The S-SBR1 has a styrene content of 30 to 38% by weight and a vinyl content of 60 to 80% by weight, the total content thereof being 100% by weight, a glass transition temperature of −20 to −5° C., and a weight average molecular weight of 1,000,000 to 1,800,000. 1. A rubber composition for a tire tread comprising:styrene-butadiene rubber in a compounding amount of 100 parts by weight,silica in a compounding amount of 90 to 170 parts by weight, andan aromatic modified terpene resin in a compounding amount of 10 to 30 parts by weight,wherein the styrene-butadiene rubber contains 40 to 100% by weight of solution-polymerized styrene-butadiene rubber (S-SBR1) and 60 to 0% by weight of solution-polymerized styrene-butadiene rubber (S-SBR2), the total content thereof being 100% by weight,the S-SBR1 has a styrene content of 30 to 38% by weight and a vinyl content of 60 to 80% by weight, the total content thereof being 100% by weight, a glass transition temperature of −20 to −5° C., and a weight average molecular weight of 1,000,000 to 1,800,000, andthe S-SBR2 has a glass transition temperature of −30° C. or higher and lower than −20° C., and a weight average molecular weight of 1,000,000 to 1,800,000.2. The rubber composition for a tire tread according to claim 1 , wherein the aromatic modified terpene resin has a softening point of 80° C. or higher and lower than 100° C.3. The rubber composition for a tire tread according to claim 1 , wherein the aromatic modified ...

METHOD FOR PRODUCING MODIFIED CONJUGATED DIENE RUBBER, MODIFIED CONJUGATED DIENE RUBBER, AND RUBBER COMPOSITION

This invention relates to a method for producing a modified conjugated diene rubber wherein the method involves: (a) a step in which a conjugated diene polymer having an alkali metal or alkaline earth metal active end and obtained by polymerizing a conjugated diene compound or by polymerizing a conjugated diene compound with an aromatic vinyl compounds is reacted with a first alkoxysilane compound which has an alkoxysilyl group having two or more alkoxy groups and has a group protected by a protecting group wherein deprotection is possible to obtain a modified conjugated-diene polymer having an alkoxysilyl group; and (b) a step in which the modified conjugated-diene polymer is reacted with a second alkoxysilane compound which has an alkoxysilyl group. 1. A method for producing a modified conjugated diene rubber , the method comprising:(a) reacting a conjugated diene polymer comprising an alkali metal or alkaline earth metal active end with a first alkoxysilane compound comprising an alkoxysilyl group comprising two or more alkoxy groups and a group protected by a protecting group, followed by deprotection to obtain a modified conjugated-diene polymer comprising a first alkoxysilyl group; and(b) reacting the modified conjugated-diene polymer comprising the first alkoxysilyl group with a second alkoxysilane compound comprising a second alkoxysilyl group,to form a modified conjugated-diene rubber,wherein the conjugated diene polymer is obtained by polymerizing a conjugated diene compound or by polymerizing a conjugated diene compound with an aromatic vinyl compound.2. The method according to claim 1 , wherein the group protected by a protecting group is at least one selected from the group consisting ofa nitrogen-containing group in which two hydrogen atoms of a primary amine have been replaced by two protecting groups,a nitrogen-containing group in which one hydrogen atom of a secondary amine has been replaced by one protecting group,a sulfur-containing group in which ...

Functionalized elastomer

The present invention is directed to a functionalized elastomer comprising: a polymeric backbone chain derived from a monomer comprising at least one conjugated diene monomer and optionally at least one vinyl aromatic monomer; and a functional group bonded to the backbone chain, the functional group comprising an oligopeptide or modified oligopeptide.

Disk-Like Nanoparticles

A disk-like nanoparticle includes a core layer that comprises a cross-linked multi-vinyl substituted aromatic hydrocarbon and a shell layer that comprises tri-block copolymer chains, each having a first, a second, and a third block. The first and third blocks of the tri-block copolymer chains comprise vinyl aromatic monomer units and are crosslinked with the core. The second block comprises conjugated diene monomer units and comprises a top and bottom axial surface of the disk-like nanoparticle. In the case of a nanoparticle having A-B-C tri-block copolymer chains, the third block comprises a top and bottom axial surface of the disk-like nanoparticle. 1. A method for making a disk-like nanoparticles in a liquid hydrocarbon medium , the nanoparticles having a core layer and a shell layer , the shell layer comprising tri-block copolymer chains having a first block , a second block , and a third block , the method comprising the steps of:polymerizing a conjugated diene monomer with a multi-functional initiator;copolymerizing a vinyl aromatic monomer to form the first and third blocks, thereby producing the tri-block copolymer chains;assembling the tri-block copolymer chains in the liquid hydrocarbon medium to form micelle structures; andcrosslinking a multiple-vinyl-substituted aromatic hydrocarbon with the tri-block copolymer chains in the micelle structures to form a cross-linked core and to form polymer nanoparticles.3. The method of claim 1 , wherein the initiator is dilithio N claim 1 ,N′-diethyl-1 claim 1 ,3-propanediamine (Li-DEPDA-Li) claim 1 , dilithio N claim 1 ,N′-diisopropyl-1 claim 1 ,3-propanediamine (Li-DPPDA-Li) claim 1 , dilithio N claim 1 ,N′-diethyl-2-butene-1 claim 1 ,4-diamine (Li-DEBDA-Li) claim 1 , trilithio tris[2-(methylamino)ethyl]amine (Tri-Li-TMAEA) claim 1 , trilithio tris[2-(isopropylamino)ethyl]amine (Tri-Li-TPAEA) claim 1 , or trilithio-1 claim 1 ,5 claim 1 ,9-triazacyclododecane (Tri-Li-TACD).4. The method of claim 1 , wherein the ...

Poly(arylene ether) - polyolefin composition and its use in wire and cable insulation and sheathing

A composition includes specific amounts of a poly(arylene ether), an unfunctionalized hydrogenated triblock copolymer, an unfunctionalized polyolefin, and magnesium dihydroxide. The composition is useful for forming insulation and sheath layers of wire and cable.

Method for manufacturing rubber composition

The present invention is a method for producing a rubber composition containing a rubber component (A) of at least one selected from natural rubbers and synthetic dienic rubbers, a filler containing an inorganic filler (B), a silane coupling agent (C), at least one vulcanization accelerator (D) selected from guanidines, sulfenamides and thiazoles, and an organic acid compound (E), wherein the rubber composition is kneaded in plural stages, the rubber component (A), all or a part of the inorganic filler (B), all or a part of the silane coupling agent (C), the vulcanization accelerator (D) and the organic acid compound (E) are kneaded in the first stage of kneading, and the number of molecules X of the organic acid compound (E) in the rubber composition in the first stage is in a relation of the following formula [1] relative to the number of molecules Y of the vulcanization accelerator (D) therein. The production method enables production of a rubber composition having a low-heat-generation property while successfully preventing the coupling function activity of the silane coupling agent from lowering. 0≦ X ≦1.5× Y   [1]

SNOW TYRE TREAD

A snow tyre with an improved grip on wet ground includes a tread formed of a rubber composition. The rubber composition includes: 20 to 100 phr of a first diene elastomer bearing at least one SiOR function, with R being hydrogen or a hydrocarbon radical, and with phr referring to parts by weight per hunder parts of elastomer; 100 to 160 phr of a reinforcing inorganic filler; and a plasticizing system. The plasticizing system includes: a content A of between 10 and 60 phr of a hydrocarbon resin having a Tg above 20° C.; and a content B of between 10 and 60 phr of a liquid plasticizing agent. A total content A+B is greater than 50 phr. Optionally, the rubber composition also includes 0 to 80 phr of a second diene elastomer. 121-. (canceled)22. A snow tire comprising a tread formed of at least a rubber composition , wherein the rubber composition includes:20 to 100 phr of a first diene elastomer bearing at least one SiOR function, R being hydrogen or a hydrocarbon radical;100 to 160 phr of a reinforcing inorganic filler; and a content A of between 10 and 60 phr of a hydrocarbon resin having a Tg above 20° C., and', 'a content B of between 10 and 60 phr of a liquid plasticizing agent,', 'wherein a total content A+B is greater than 50 phr., 'a plasticizing system that includes23. The tire according to claim 22 , wherein the rubber composition further includes:0 to 80 phr of a second diene elastomer;24. The tire according to claim 22 , wherein the first elastomer includes vinylaromatic units.25. The tire according to claim 24 , wherein the vinylaromatic units are styrene units.26. The tire according to claim 22 , wherein the first elastomer includes butadiene units.27. The tire according to claim 22 , wherein the first elastomer is an SBR.28. The tire according to claim 22 , wherein R is hydrogen.29. The tire according to claim 22 , wherein R is an alkyl.30. The tire according to claim 22 , wherein the first diene elastomer also bears at least one amine function.31. The ...

RUBBER COMPOSITION FOR TIRE TREAD AND PNEUMATIC TIRE USING THE SAME

A rubber composition for tire tread contains a diene-based rubber including 30 wt % or more of a terminal modifying group-containing conjugated diene-based copolymer, silica, carbon black, and at least one of silane coupling agents represented by specified formulae. The total amount of silica and carbon black in the composition is 35 to 140 parts by weight relative to 100 parts by weight of the diene-based rubber, while the silane coupling agent content is 4 to 18 wt % on the silica content. The copolymer is produced by a specified method such that the aromatic vinyl monomer content in the copolymer is 38 to 48 wt %, the vinyl unit content in all the conjugated diene-based monomers is 20 to 35 mol %, the weight average molecular weight of the copolymer is 600,000 to 1,000,000, and the terminal modifying group in the copolymer contains a functional group which interacts with the silica. 2. The rubber composition for tire tread according to claim 1 , wherein the amount of the silica is 20 parts to 120 parts by weight relative to 100 parts by weight of the diene-based rubber.4. The rubber composition for tire tread according to claim 1 , wherein the functional group which interacts with the silica is at least one selected from the group consisting of an alkoxysilyl group claim 1 , a hydroxyl group claim 1 , an aldehyde group claim 1 , a carboxyl group claim 1 , an amino group claim 1 , an imino group claim 1 , an epoxy group claim 1 , an amido group claim 1 , a thiol group claim 1 , and an ether group.5. The rubber composition for tire tread according to claim 1 , wherein the terminal modifying group-containing conjugated diene-based copolymer has claim 1 , as the functional group which interacts with the silica claim 1 , a hydroxyl group and at least one selected from the group consisting of an alkoxysilyl group claim 1 , an aldehyde group claim 1 , a carboxyl group claim 1 , an amino group claim 1 , an imino group claim 1 , an epoxy group claim 1 , an amido group ...

ACTIVATED RESOL CURE RUBBER COMPOSITION

The invention is related to a process for preparing a vulcanizable rubber composition comprising at least one elastomeric polymer, at least one phenol formaldehyde resin cross-linker, an activator package, and at least one activated zeolite, and a vulcanizable rubber composition prepared by said process.

RUBBER COMPOSITIONS CONTAINING NON-SULFUR SILICA COUPLING AGENTS BOUND TO DIENE RUBBERS

The invention provides vulcanizable rubber compound having improved tensile mechanical and dynamic viscoelastic properties. The compounds are formed by mixing an elastomer, containing unsaturated carbon-carbon bonds in its molecular structure, with a reinforcing inorganic filler silica in the presence of an alkyl alkoxysilane and a non-sulfur coupling agent that binds to the rubber backbone with an “ene” linkage or a 1,3 dipolar addition linkage. In particular, the coupling agent and the alkyl alkoxysilane are present in the compound in a weight ratio of about 0.0001:1 to about 1:1. 2. The method of claim 1 , wherein the weight ratio of the coupling agent to the alkyl alkoxysilane is about 0.001:1 to about 0.80:1.3. The method of claim 1 , wherein the coupling agent is present in an amount of about 0.0001% to about 3% by weight claim 1 , based on the weight of the silica.4. The method of claim 3 , wherein the alkyl alkoxysilane is present in an amount of about 0.1% to about 20% by weight claim 3 , based on the silica.5. The method of claim 1 , wherein the non-sulfur moiety of the coupling agent consists essentially of an eneophile.6. The method of claim 5 , wherein the coupling agent comprises an imidoalkoxysilane claim 5 , an azo-bis-carbonyl-alkoxysilane claim 5 , or mixtures thereof.7. The method of claim 1 , wherein the inorganic filler is selected from the group consisting of silicates claim 1 , talc claim 1 , kaolin claim 1 , clay claim 1 , metal oxides claim 1 , aluminum hydrate claim 1 , mica claim 1 , and mixtures thereof.8. The method of claim 1 , wherein the elastomer is selected from the group consisting of homopolymers of a conjugated diene monomer claim 1 , and copolymers and terpolymers of the conjugated diene monomers with monovinyl aromatic monomers and trienes.9. The method of claim 1 , wherein the elastomer is selected from the group consisting of natural rubber claim 1 , polyisoprene claim 1 , styrene/butadiene rubber claim 1 , polybutadiene ...

TREAD OF A TYRE WITH IMPROVED GRIP ON WET GROUND

A tyre, which has an improved grip on wet ground, includes a tread formed of at least a rubber composition. The rubber composition includes: from 50 to 100 phr of a copolymer based on styrene and butadiene, e.g., a styrene/butadiene copolymer (SBR), with phr referring to parts by weight per hundred parts of elastomer; from 100 to 150 phr of a reinforcing inorganic filler, e.g., silica; and a plasticizing system. The plasticizing system includes: a content A of between 10 and 60 phr of a thermoplastic hydrocarbon resin exhibiting a Tg of greater than 20° C.; and a content B of between 10 and 60 phr of a liquid plasticizing agent. A total content A+B is greater than 50 phr. Optionally, the rubber composition includes from 0 to 50 phr of another copolymer, e.g., a diene elastomer such as a polybutadiene or natural rubber. 115-. (canceled)16. A tire comprising a tread formed of at least a rubber composition , wherein the rubber composition includes:from 50 to 100 phr of a copolymer elastomer based on styrene and butadiene;from 100 to 150 phr of a reinforcing inorganic filler; and a content A of between 10 and 60 phr of a thermoplastic hydrocarbon resin exhibiting a Tg of greater than 20° C., and', 'a content B of between 10 and 60 phr of a liquid plasticizing agent,', 'wherein a total content A+B is greater than 50 phr., 'a plasticizing system that includes17. The tire according to claim 16 , wherein the rubber composition further includes:from 0 to 50 phr of a second elastomer that includes a diene elastomer.18. The tire according to claim 16 , wherein the copolymer elastomer is a styrene/butadiene copolymer elastomer.19. The tire according to claim 17 , wherein the second elastomer is selected from a group that includes: polybutadienes claim 17 , natural rubber claim 17 , synthetic polyisoprenes claim 17 , butadiene copolymers claim 17 , isoprene copolymers claim 17 , and mixtures thereof.20. The tire according to claim 19 , wherein the second elastomer is a ...

RUBBER BLEND WITH AN ENVIRONMENTALLY-FRIENDLY PLASTICISER

A rubber blend, particularly for pneumatic vehicle tires, harnesses, straps and hoses. The rubber blend has the following composition: at least one polar or nonpolar rubber, at least one light and/or dark filler, at least one plasticizer which is free from polycyclic aromatic compounds and which has been produced based on waste materials containing carbon that result from the production of tires and additional technical rubber articles, as well as further additives. 1. A rubber mixture comprising:at least one rubber, the rubber being selected from the group consisting of a polar rubber and a nonpolar rubber or a mixture thereof;at least one filler, the filler being selected from the group consisting of a pale filler and a dark filler or a mixture thereof;a plasticizer, the plasticizer being free from polycyclic aromatics, and the plasticizer having been produced on the basis of carbon-containing wastes from the production of tires and other industrial rubber products; andfurther additives.2. The rubber mixture of claim 1 , wherein the at least one rubber is selected from the group consisting of a natural polyisoprene claim 1 , a synthetic polyisoprene claim 1 , a butadiene rubber claim 1 , and a styrene-butadiene rubber claim 1 , or a mixture thereof.3. The rubber mixture of claim 1 , wherein the at least one filler is a pale filler and is silica.4. The rubber mixture of claim 1 , wherein the at least one filler is a dark filler and is carbon black.5. The rubber mixture of claim 1 , wherein the plasticizer has been produced by direct catalytic liquefaction.6. The rubber mixture of claim 1 , wherein an amount of the plasticizer is of from 0.1 to 150 phr.7. A method of producing a tire comprising preparing the rubber mixture of .8. The method as claimed in for producing the tread or a body mixture of a tire.9. A method of producing a belt claim 1 , drive-belt or hose comprising preparing the rubber mixture of . This application is a continuation application of ...

Functional diene elastomer with a low pi and improved cold flow, and rubber composition containing same

The invention relates to a functionalized diene elastomer composed: a) of a diene elastomer functionalized, at the chain end or in the middle of the chain, by a tin functional group, exhibiting a monomodal distribution of molecular weights before functionalization and a polydispersity index before functionalization of less than or equal to 1.3, b) of a diene elastomer star-branched with a tin compound, exhibiting a monomodal distribution of molecular weights before star-branching and a polydispersity index before star-branching of less than or equal to 1.3, and c) of a content of less than 15% by weight, with respect to the total weight of the functionalized diene elastomer, of a non-tin-functional diene elastomer, the said diene elastomers a), b) and c) being, before optional functionalization or optional star-branching, the same in nature.

Non-carboxylated styrene-butadiene copolymers, preparation method and use thereof

A non-carboxylated styrene-butadiene copolymer, preparation method and use thereof are provided. The non-carboxylated styrene-butadiene copolymer is prepared by hot polymerization in the absence of acid monomers and is used in asphalt-based systems such as asphalt emulsions.

Vegetable oil derivatives as extender oils for elastomer compositions

Elastomer composition comprising at least one elastomer and at least one vegetable oil derivative selected from one or more of: a. mixture of triglycerides comprising one or more of the following oligomeric structures: R4[OC(O)R 1 C(O)OCH 2 CH(OR 2 )CH 2] n OR 3 wherein R 1 is selected from C2-C22 alkylenes, R 2 is selected from one or more of the following groups consisting of C6-C24 dicarboxylic acid residues and C6-C24 monocarboxylic acid residues, R 3 is selected from one or more of the following groups consisting of H, C 6 -C 24 dicarboxylic acid residues and C 6 -C 24 monocarboxylic acid residues, R 4 is an alkyl group, n is an integer greater than or equal to 2, said C 6 -C 24 dicarboxylic acid residues of R 2 and R 3 being esterified with monoalcohols and said mixture of triglycerides having a Numerical Average Molecular Weight (Mn) of between 800 and 10.000. b. triglycerides of one or more long chain carboxylic acids including at least one carboxylic acid containing adjacent hydroxyl groups, c. esters of polyols with at least a monocarboxylic acid and at least a dicarboxylic acid, the said esters being other than triglycerides.

RUBBER BLEND WITH IMPROVED ROLLING RESISTANCE BEHAVIOR

A rubber blend, particularly for pneumatic vehicle tires, harnesses, straps and hoses. The rubber blend includes at least one rubber blend A of a solid styrene-butadiene rubber with an average molecular weight Mof 100,000 to 5,000,000 g/mol and a liquid butadiene rubber with an average molecular weight Mof 500 to 9000 g/mol, wherein the styrene-butadiene rubber is solution-polymerized or emulsion-polymerized, as well as 30 to 300 phr of at least one silicic acid and further blend components. 1. A rubber mixture comprising:{'sub': n', 'n, 'at least one rubber blend A which is composed of a solid styrene-butadiene rubber with an average molar mass Mof from 100 000 to 5 000 000 g/mol, wherein the styrene-butadiene rubber has been solution-polymerized or emulsion-polymerized, and of a liquid butadiene rubber with an average molar mass Mof from 500 to 9000 g/mol;'}from 30 to 300 phr of at least one silica; andfurther mixture constituents.2. The rubber mixture as claimed in claim 1 , wherein a proportion of the solid rubber of the rubber blend A claim 1 , based on a total amount of the solid rubber in the rubber mixture claim 1 , is at least 50 phr.3. The rubber mixture as claimed in claim 1 , wherein the rubber mixture also comprises at least one further liquid butadiene rubber with average molar mass Mof from 500 to 9000 g/mol as plasticizer.4. The rubber mixture as claimed in claim 1 , further comprising at least one mineral oil.5. The rubber mixture as claimed in claim 1 , wherein an amount of the at least one silica is from 50 to 300 phr.6. The rubber mixture as claimed in claim 1 , further comprising from 0.1 to 20 phr of carbon black.7. The rubber mixture as claimed in claim 1 , further comprising at least one solid butadiene rubber having an average molar mass Mof from 200 000 to 3 000 000 g/mol and a cis-content of at least 80% by weight.8. A method of producing a tire comprising preparing the rubber mixture as claimed in .9. The method as claimed in for ...

TYRE TREAD

A tyre, which has an improved grip on wet ground, includes a tread formed of at least a rubber composition. The rubber composition includes: 20 to 100 phr of a first diene elastomer bearing at least one SiOR function, with R being hydrogen or a hydrocarbon radical, and with phr referring to parts by weight per hundred parts of elastomer; 100 to 160 phr of a reinforcing inorganic filler; and a plasticizing system. The plasticizing system includes: a content A of between 5 and 60 phr of a hydrocarbon resin having a Tg above 20° C.; and a content B of between 5 and 60 phr of a liquid plasticizing agent. A total content A+B is greater than 45 phr. The rubber composition optionally includes 0 to 80 phr of a second diene elastomer. 121-. (canceled)22. A tire comprising a tread formed of at least a rubber composition , wherein the rubber composition includes:20 to 100 phr of a first diene elastomer bearing at least one SiOR function, R being hydrogen or a hydrocarbon radical;100 to 160 phr of a reinforcing inorganic filler; a content A of between 5 and 60 phr of a hydrocarbon resin having a Tg above 20° C., and', 'a content B of between 5 and 60 phr of a liquid plasticizing agent,', 'wherein a total content A+B is greater than 45 phr., 'a plasticizing system that includes23. The tire according to claim 22 , wherein the rubber composition further includes:0 to 80 phr of a second diene elastomer.24. A tire according to claim 22 , wherein the first diene elastomer includes vinylaromatic units.25. The tire according to claim 24 , wherein the vinylaromatic units are styrene units.26. The tire according to claim 22 , wherein the first diene elastomer includes butadiene units.27. The tire according to claim 22 , wherein the first diene elastomer is an SBR.28. The tire according to claim 22 , wherein R is hydrogen.29. The tire according to claim 22 , wherein R is an alkyl.30. The tire according to claim 22 , wherein the first diene elastomer also bears at least one amine function. ...

Rubber composition including a functionalized thermoplastic polymer

The present invention relates to a diene rubber composition reinforced with an inorganic filler comprising a thermoplastic polymer bearing, at at least one end, a silanol or silyl ether functional group. The presence of the functional thermoplastic polymer makes it possible to improve the compromise of performances, which are the handling and the grip, of a tyre having a tread that is based on such a composition.

RUBBER COMPOSITION FOR USE IN TIRES, AND PNEUMATIC TIRE

The present invention provides a rubber composition for a tire, which results in both excellent fuel economy and high wet grip performance as well as good abrasion resistance; and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for a tire, the rubber composition containing a modified styrene butadiene rubber formed using a specific nitrogen-containing compound as a monomer, silica, and a specific amount of a diene rubber gel. 2. The rubber composition for a tire according to claim 1 ,wherein the modified styrene butadiene rubber is contained in an amount of 5% by mass or more based on 100% by mass of the rubber component, andthe silica is contained in an amount of 10 to 150 parts by mass per 100 parts by mass of the rubber component.3. The rubber composition for a tire according to claim 1 , which is for use as a rubber composition for a tread.4. A pneumatic tire claim 3 , comprising a tread formed from the rubber composition according to . The present invention relates to a rubber composition for a tire, and a pneumatic tire using the same.The fuel economy of vehicles has been improved by decreasing the rolling resistance (or improving the performance in terms of rolling resistance) of tires. These days, better fuel economy is increasingly required of vehicles, and very low heat build-up (excellent fuel economy) is required of rubber compositions for producing tires.As the method for improving the fuel economy of a rubber composition, a method of reducing the amount of reinforcing filler is known. However, in this method, the hardness and strength of the rubber composition may be decreased, causing a decrease in handling performance (handling stability), wet grip performance, durability, and abrasion resistance.Another known method for improving the fuel economy is a method of replacing carbon black used as a reinforcing filler by silica. However, because silica contains a hydrophilic silanol group on its ...

METHOD OF PRODUCING A TREAD COMPOUND

A method of producing a rubber compound, which includes mixing at least one cross-linkable unsaturated-chain polymer base, silica, a first type of silane coupling agent, and a second type of silane coupling agent. The second type of silane coupling agent is added to the mix after the first type of silane coupling agent has reacted with the silica. The first type of silane coupling agent is a trialkoxymercaptoalkyl-silane, and the second type of silane coupling agent is a mercaptosilane protected in the form of thioester. 1. A method of producing a rubber compound , comprising mixing at least one cross-linkable unsaturated-chain polymer base , silica , a first type of silane coupling agent , and a second type of silane coupling agent; said method being characterized in that said second type of silane coupling agent is added to the mix after said first type of silane coupling agent has reacted with said silica.2. A method of producing a rubber compound claim 1 , as claimed in claim 1 , characterized in that said first type of silane coupling agent is a trialkoxymercaptoalkyl-silane claim 1 , and said second type of silane coupling agent is a mercaptosilane protected in the form of thioester.3. A method of producing a rubber compound claim 2 , as claimed in claim 2 , characterized by comprising a first mixing step of mixing at least said cross-linkable unsaturated-chain polymer base claim 2 , 50 to 250 phr of said silica claim 2 , and 2 to 30 phr of said trialkoxymercaptoalkyl-silane; a second mixing step claim 2 , in which 2 to 15 phr of said mercaptosilane protected in the form of thioester is added to the mix from said first mixing step; and a final mixing step claim 2 , in which curing agents are added.4. A method of producing a rubber compound claim 3 , as claimed in claim 3 , characterized in that said cross-linkable unsaturated-chain polymer base comprises 20 to 60 phr of an S-SBR polymer mix containing 25-45% styrene and 20-70% vinyl claim 3 , and comprising 20 ...

RUBBER COMPOSITION, METHOD FOR PRODUCING SAME, AND TIRE

Objects of the present invention are to provide a rubber composition that can obtain a rubber elastic body having small rolling resistance and excellent impact resilience and a method for producing the same, and to provide a tire having small rolling resistance and excellent impact resilience. 1. A method for producing a rubber composition , comprising kneading a rubber component comprisingof from 30 to 95% by mass of a conjugated diene polymer (A) comprising a hydrocarbyloxysilyl group, andof from 5 to 70% by mass of cross-linked rubber particles (B),with of from 20 to 100 parts by mass of silica (C), based on 100 parts by mass of the rubber component.2. The method according to claim 1 , wherein the conjugated diene polymer (A) comprises at least one functional group selected from the group consisting of a primary amino group claim 1 , a secondary amino group claim 1 , a tertiary amino group claim 1 , a thiol group claim 1 , an epoxy group claim 1 , a thioepoxy group claim 1 , an oxetane group and a hydrocarbylthio group.3. The method according to claim 1 , wherein a cross-linked rubber constituting the cross-linked rubber particles (B) comprises at least one rubber polymer selected from the group consisting of isoprene rubber claim 1 , butadiene rubber claim 1 , styrene-butadiene copolymerized rubber claim 1 , styrene-isoprene copolymerized rubber claim 1 , butadiene-isoprene copolymerized rubber claim 1 , styrene-butadiene-isoprene copolymerized rubber claim 1 , styrene-acrylonitrile-butadiene copolymerized rubber claim 1 , acrylonitrile-butadiene copolymerized rubber claim 1 , ethylene-α-olefin copolymerized rubber claim 1 , ethylene-α-olefin-diene copolymerized rubber claim 1 , chloroprene rubber claim 1 , halogenated butyl rubber and polysiloxane rubber claim 1 , anda graft polymer obtained by graft polymerizing a conjugated diene compound, a styrene compound, or both, to the rubber polymer.4. The method according to claim 3 , wherein the cross-linked rubber ...

RUBBER COMPOSITION, PRODUCTION METHOD THEREFOR AND TIRE

Objects of the present invention are to provide a rubber composition that can obtain a rubber elastic body having small rolling resistance and excellent impact resilience and a method for producing the same, and to provide a tire having small rolling resistance and excellent impact resilience. The rubber composition of the present invention is obtained by kneading a conjugated diene polymer (A) having a group with bonding reactivity to silica only at one site of one molecule of the polymer, a polymer (B) having groups with bonding reactivity to silica at a plurality of sites of one molecule of the polymer, and a filler (C) containing silica. 1. A method for producing a rubber composition the method comprising kneading:a conjugated diene polymer (A) having a group with bonding reactivity to silica only at one site of one molecule of the polymer,a polymer (B) having groups with bonding reactivity to silica at a plurality of sites of one molecule of the polymer anda filler (C) comprising silica.2. The method of claim 1 , comprising first kneading the conjugated diene polymer (A) and the filler (C) to obtain a kneaded mixture claim 1 , then kneading the kneaded mixture and the polymer (B).3. The method of claim 1 , wherein a mass ratio of the conjugated diene polymer (A) to the polymer (B) is in a range from 97/3 to 60/40.4. The method claim 1 , wherein the polymer (B) comprises a structural unit derived from a conjugated diene compound.5. The method of claim 1 , wherein:the group with bonding reactivity to silica at one site of one molecule of the conjugated diene polymer (A) is at least one functional group selected from the group consisting of a hydrocarbyloxysilyl group, a primary amino group, a secondary amino group, a tertiary amino group, a thiol group, an epoxy group, a thioepoxy group, an oxetane group and a hydrocarbylthio group, andthe groups with bonding reactivity to silica at a plurality of sites of one molecule of the polymer (B) are each independently at ...

Tire, the tread of which comprises a thermoplastic polyurethane block copolymer

A tire, the tread of which comprises a rubber composition comprising at least: as first elastomer, a diene elastomer; as second elastomer, a thermoplastic polyurethane block copolymer with polyurethane blocks and polydiene blocks; 70 to 150 pce of an inorganic reinforcing filler; a plasticizing system comprising: with a content A of 5 to 60 pce, a hydrocarbon resin, the Tg of which is higher than 20° C.; with a content B of 5 to 60 pce, a plasticizer which is liquid at 20° C., and the Tg of which is lower than −20° C.; it being understood that A+B is higher than 30 pce. The use of a thermoplastic polyurethane block copolymer with polyurethane blocks and polydiene blocks, in particular in the presence of high filler and plasticizer contents, in the composition of a tire tread as per the present invention enables tires having improved grip on wet ground to be obtained.

RUBBER COMPOSITION AND PNEUMATIC TIRE

The present invention provides a rubber composition that can enhance the fuel economy, wet-grip performance, abrasion resistance, and kneading processability in a balanced manner, and a pneumatic tire using this rubber composition. The present invention relates to a rubber composition that contains a rubber component and silica, wherein the rubber component contains, based on 100% by mass of the rubber component, 10 to 70% by mass of a high-cis polybutadiene having a cis content of 95% by mass or more and satisfying the following requirements (A) to (C): (A) a Mooney viscosity (ML) of 40 to 49; (B) a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 3.0 to 3.9; and (C) an index (n-value in Expression (1) below) of velocity dependence of Mooney viscosity of 2.3 to 3.0, and 30 to 90% by mass of a conjugated diene polymer containing a constituent unit based on a conjugated diene and a constituent unit represented by formula (I) below, and an amount of the silica is 5 to 150 parts by mass per 100 parts by mass of the rubber component, 2. The rubber composition according to claim 1 ,{'sup': 1', '2, 'sub': '1-6', 'wherein Rand Rin formula (Ia) are Chydrocarbyl groups.'}3. The rubber composition according to claim 1 ,{'sup': 1', '2', '3, 'wherein two of X, X, and Xin formula (I) are selected from a group represented by formula (Ia) and a hydroxyl group.'}7. The rubber composition according to claim 6 ,{'sup': 34', '35, 'wherein one of Rand Rin formula (IVa) is a hydrogen atom.'}8. The rubber composition according to claim 1 ,wherein the conjugated diene polymer has a vinyl bond content of at least 10 mol % but not more than 80 mol % per 100 mol % of the constituent unit based on a conjugated diene.9. The rubber composition according to claim 1 ,wherein the high-cis polybutadiene has a ratio (Tcp/ML) of a 5% by mass toluene solution viscosity (Tcp) to the Mooney viscosity (ML) of 2.5 to 3.5.10. The rubber ...

RUBBER COMPOSITION FOR TREAD, AND PNEUMATIC TIRE

The present invention provides a rubber composition for a tread which enables not only to improve handling stability, abrasion resistance, and fuel economy in a balanced manner, but also to improve wet grip performance and processability in a balanced manner, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for a tread, comprising a terminally-modified solution-polymerized styrene-butadiene rubber, a butadiene rubber synthesized in the presence of a rare earth catalyst, and a reinforcing agent. 17.-. (canceled)9. The rubber composition according to claim 8 ,wherein a rubber component of the rubber composition contains, based on 100% by mass of the rubber component, 10 to 70% by mass of the terminally-modified solution-polymerized styrene-butadiene rubber and 5 to 30% by mass of the butadiene rubber synthesized in the presence of a rare earth catalyst.10. The rubber composition according to claim 8 ,wherein the reinforcing agent comprises 3 to 20 parts by mass of carbon black and 30 to 100 parts by mass of silica, each per 100 parts by mass of the rubber component.11. The rubber composition according to claim 8 ,wherein the rubber component contains, based on 100% by mass of the rubber component, 10 to 40% by mass of a styrene-butadiene rubber having a styrene content of 20% by mass or more, a weight average molecular weight (Mw) of 800,000 or more, and a ratio of weight average molecular weight to number average molecular weight (Mw/Mn) of 0.9 to 2.5.12. The rubber composition according to claim 8 , comprising claim 8 , per 100 parts by mass of the rubber component claim 8 ,1 to 8 parts by mass of an aromatic vinyl polymer polymerized from at least one of α-methylstyrene and styrene.13. The rubber composition according to claim 8 , {'br': None, '3.0≦[(the amount of the reinforcing agent)/(the acetone-extractable content)]≦10.0.'}, 'wherein an amount of the reinforcing agent and an acetone-extractable ...

Porous material for ink stamps, production method therefor, and self-inking stamp

A porous stamp material allows only resin in a region thereof irradiated with a laser beam during laser engraving in a production process of an ink stamp to be burnt and vaporized while preventing melting in any other unwanted region. The porous material for ink stamps comprises: at least one thermoplastic resin selected from the group consisting of low-density polyethylene, linear low-density polyethylene, high-density polyethylene, ethylene-alpha-olefin copolymer, ethylene-vinyl acetate copolymer, and ethylene-acrylic copolymer; at least one thermoplastic elastomer selected from a plurality of different hydrogenated styrene based thermoplastic elastomers; and at least one filler selected from a plurality of different inorganic compounds, wherein the thermoplastic resin and/or the thermoplastic elastomer are cross-linked, and formed in a continuous pore structure. 1. A porous material for ink stamps , comprising:at least one thermoplastic resin selected from the group consisting of low-density polyethylene, linear low-density polyethylene, high-density polyethylene, ethylene-alpha-olefin copolymer, ethylene-vinyl acetate copolymer, and ethylene-acrylic copolymer;at least one thermoplastic elastomer selected from a plurality of different hydrogenated styrene based thermoplastic elastomers; andat least one filler selected from a plurality of different inorganic compounds,wherein the thermoplastic resin and/or the thermoplastic elastomer are cross-linked, and formed in a continuous pore structure.2. The porous material as defined in claim 1 , wherein the at least one thermoplastic resin is contained at a mixing ratio of 2 to 30 with respect to the at least one thermoplastic elastomer.3. The porous material as defined in claim 1 , wherein the at least one thermoplastic resin has a glass-transition temperature of 0° C. or less.4. The porous material as defined in claim 1 , wherein the at least one filler is selected from a plurality of different silicates.5. The porous ...

RUBBER COMPOSITION AND MANUFACTURING PROCESS THEREFOR, AND TIRE

A rubber composition that can obtain a rubber elastic body having small rolling resistance and excellent impact resilience and a method for producing the same, and a tire having small rolling resistance and excellent impact resilience are provided. 1. A method for producing a rubber composition , the method comprising kneading a rubber component containing a conjugated diene polymer (A) having at least one functional group selected from a tertiary amino group , a thiol group , a hydroxyl group , an epoxy group , a carboxylic acid group , a thioepoxy group , a hydrocarbylthio group and a hydrocarbylsilyl group and a conjugated diene polymer (B) having no functional group chemically bondable to silica , silica (C) and a dispersing agent (D) comprising an organic compound having at least one element selected from the group consisting of nitrogen , carbonyl oxygen and ether oxygen.3. The method for according to claim 1 , wherein the conjugated diene polymer (B) claim 1 , the silica (C) and the dispersing agent (D) are kneaded claim 1 , and thereafter claim 1 , the conjugated diene polymer (A) is added thereto claim 1 , followed by kneading.4. The method according to claim 1 , wherein the conjugated diene polymer (A) claim 1 , the conjugated diene polymer (B) and the silica (C) are kneaded claim 1 , and thereafter claim 1 , the dispersing agent (D) is added thereto claim 1 , followed by kneading.5. A rubber composition obtained by the process of .6. The rubber composition according to claim 5 , wherein the dispersing agent (D) comprises an organic compound represented by formula (1) or formula (2):{'br': None, 'A—X—H; \u2003\u2003Formula (1)'}{'br': None, 'sub': 'n', 'M(A′—X—H),\u2003\u2003Formula (2)'}wherein:A represents a group comprising nitrogen and/or oxygen;A′ represents a group comprising nitrogen and/or oxygen;X represents a hydrocarbylene group or a polyoxyalkylene chain each having 1 to 20 carbon atoms, which may be straight-chain or branched;H represents ...

TYRE, THE TREAD OF WHICH COMPRISES A POLY(ALKYLENE ESTER) RESIN

A tyre, the tread of which comprises a rubber composition comprising at least: a diene elastomer; from 100 to 150 phr of a reinforcing inorganic filler; a poly(alkylene ester) thermoplastic resin; a plasticizing system comprising: according to a content A of between 5 and 60 phr, a hydrocarbon resin exhibiting a Tg of greater than 20° C.; according to a content B of between 5 and 60 phr, a plasticizer which is liquid at 20° C., the Tg of which is less than −20° C.; and it being understood that A+B is greater than 40 phr. The use of a poly(alkylene ester) resin, combined in particular with high contents of filler and plasticizers, makes it possible to improve the stiffness of the tread and thus the road behaviour of the tyre, without affecting the hysteresis and thus the rolling resistance. 1. A tire , the tread of which comprises a rubber composition comprising at least:a diene elastomer;from 100 to 150 phr of a reinforcing inorganic filler;a poly(alkylene ester) thermoplastic resin; according to a content A of between 5 and 60 phr, a hydrocarbon resin exhibiting a Tg of greater than 20° C.;', 'according to a content B of between 5 and 60 phr, a plasticizer which is liquid at 20° C., the Tg of which is less than −20° C.;', 'wherein A+B is greater than 40 phr., 'a plasticizing system comprising2. The tire according to claim 1 , wherein the diene elastomer is selected from the group consisting of polybutadienes (BRs) claim 1 , synthetic polyisoprenes (IRs) claim 1 , natural rubber (NR) claim 1 , butadiene copolymers claim 1 , isoprene copolymers and mixtures of these elastomers.3. The tire according to claim 2 , wherein the diene elastomer is selected from the group consisting of polybutadienes claim 2 , butadiene copolymers and the mixtures of these elastomers.4. The tire according to claim 3 , wherein the diene elastomer is a styrene/butadiene copolymer (SBR).5. The tire according to claim 4 , wherein the SBR content is within a range from 50 to 100 phr.6. The tire ...

TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE

The present invention provides a tire rubber composition that makes it possible to suppress discoloration of tires, and a pneumatic tire formed from the rubber composition. The present invention relates to a tire rubber composition containing a bluing agent. 1. A tire rubber composition , comprising a bluing agent.2. The tire rubber composition according to claim 1 ,wherein the bluing agent is a pigment or a dye.3. The tire rubber composition according to claim 1 ,wherein the bluing agent is present in an amount of 0.2 to 50 parts by mass per 100 parts by mass of a rubber component in the tire rubber composition.4. The tire rubber composition according to claim 1 ,wherein the tire rubber composition is for use as a sidewall rubber composition.5. A pneumatic tire claim 1 , formed from the tire rubber composition according to . The present invention relates to a tire rubber composition, and a pneumatic tire formed from the same.Sidewall rubber compositions for tires contain antioxidants for preventing cracks from developing in sidewalls. However, such an antioxidant in a sidewall rubber migrates to the sidewall surface over time, and thus the antioxidant is oxidized at the surface, which causes the sidewall to turn yellow. Moreover, tire component rubbers, which contain many double bonds, have poor weather resistance, and therefore may turn yellow over time. Such sidewall yellowing causes an undesired appearance since tires are originally black due to carbon black. This problem should be overcome to maintain the commercial value of tires.Patent Literature 1 discloses a method for suppressing migration of an antioxidant to the sidewall surface by using polyethylene glycol having a specific molecular weight. Still, there is a demand for other techniques.Patent Literature 1: JP-A H05-179067The present invention aims to solve the above problem and to provide a tire rubber composition that makes it possible to suppress discoloration of tires, and a pneumatic tire formed ...

NOVEL COMPOSITION FOR THE PRODUCTION OF VINYLAROMATIC MATERIALS WITH IMPACT STRENGTH IMPROVED BY A STRUCTURE-MODIFYING ADDITIVE

The present invention refers to an improved composition for the production of vinyl aromatic polymers modified with rubber, in which a substantial impact resistance improvement of the final product is produced by the incorporation of a structure modifying additive in different steps of the polymerization, preferably during the process of co-continuity of phases and specially, during the inversion of phases interval. The additive is an insaturated compound of formula: 2. A composition according to wherein the structure modifying additive is added without mixing with vehicles.3. A composition according to wherein the structure modifying additive is added as a mixture of polymers comprising the family of vinyl aromatic compounds comprising the family of the ethers claim 1 , esters claim 1 , amines and amides.4. A mixture of the additive according to wherein the additive is found in a ratio from 5/1 to 1/5 in weight.5. A composition according to wherein the structure modifying additive is added during the interval of inversion of phases of the reaction.6. A composition according to wherein the structure modifying additive is added once.7. A composition according to wherein the structure modifying additive is added on intermittent dosages.8. A composition according to wherein the conjugated diene is selected form the group comprising: 1 claim 1 ,3-butadiene claim 1 , isoprene claim 1 , 2 claim 1 ,3-dimethyl-1 claim 1 ,3-butadiene claim 1 , copolymers in linear or radial blocks claim 1 , in perfect or partially randomized blocks from the type of SB claim 1 ,SBR claim 1 ,SBS claim 1 ,BSB or multiple blocks (SB)n claim 1 , wherein S is a vinyl aromatic polymer claim 1 , B is a conjugated diene and n is an integer number claim 1 , and wherein a elastomeric part can be partially or totally hydrogenated.9. A composition according to claim 1 , wherein the composition of the copolymers in blocks can be varied between 5/95 to 80/20 in weight and mixtures therebetween claim 1 , ...

MULTIPLE-ACID-DERIVED METAL SOAPS INCORPORATED IN RUBBER COMPOSITIONS AND METHOD FOR INCORPORATING SUCH SOAPS IN RUBBER COMPOSITIONS

A composition includes a polymer matrix, a multiple-acid-derived metal soap, wherein the metal has an oxidation state of +3 or +4. An associated method for making a rubber composition includes the steps of: combining a solvent and a multiple carboxylic, phosphonic, phosphoric, sulfuric, or sulfonic acid, or mixtures thereof, and mixing to form solution A; adding a source of metal ions to solution A and mixing to form a product A, the metal being selected from the metals having an oxidation state of +3 or +4, whereby product A includes a multiple-acid-derived metal soap; and combining the multiple-acid-derived metal soap with a diene rubber. A method of making a tire component includes the steps of: combining a solvent and a multiple carboxylic, phosphonic, phosphoric, sulfuric, or sulfonic acid, or mixtures thereof, and mixing to form solution A; adding a source of metal ions to solution A and mixing to form a product A, the metal being selected from the metals having an oxidation state of +3 or +4, whereby product A includes a multiple-acid-derived metal soap; combining the multiple-acid-derived metal soap with a diene rubber; and molding and vulcanizing the rubber composition into a tire component. 2. The method of claim 1 , wherein the solvent is a polar solvent claim 1 , and a base is added to the polar solvent.3. The method of claim 1 , wherein the source of metal ions is added in solution.4. The method of claim 1 , wherein the metal is aluminum claim 1 , iron claim 1 , titanium claim 1 , or cobalt.5. The method of claim 1 , wherein the multiple-acid-derived metal soap contains an alkyl R group between acid-derived groups claim 1 , wherein the R group contains about twelve to about fifty carbon atoms.6. The method of claim 1 , wherein the diene rubber is selected from the group consisting of styrene-butadiene rubber claim 1 , natural rubber claim 1 , butadiene rubber claim 1 , polyisoprene rubber claim 1 , and combinations thereof.7. The method of claim 1 , ...

RUBBER COMPOSITION

The present invention provides a rubber composition containing: (A) a rubber component containing 10% by mass or more of at least one kind of rubber selected from diene rubber synthesized by emulsion polymerization and natural rubber and 90% by mass or less of another kind of diene rubber; (B) silica having a n-hexadecyltrimethylammonium bromide (CTAB) adsorption specific surface area of not less than 180 m/g measured according to a method described in ASTM D3765-92; (C) at least one silane coupling agent selected from a polysulfide compound and a thioester compound; and (D) a vulcanization accelerator, the rubber composition after vulcanization having an average aggregated aggregate area (nm) of the silica of 1,900 or less, and thus provides a rubber composition that is improved in low-heat-generation property. 1. A rubber composition comprising: (A) a rubber component containing 10% by mass or more of at least one kind of rubber selected from diene rubber synthesized by emulsion polymerization and natural rubber and 90% by mass or less of another kind of diene rubber; (B) a silica having a n-hexadecyltrimethylammonium bromide (CTAB) adsorption specific surface area of not less than 180 m/g measured according to a method described in ASTM D3765-92; (C) at least one silane coupling agent selected from a polysulfide compound and a thioester compound; and (D) a vulcanization accelerator , the rubber composition after vulcanization having an average aggregated aggregate area (nm) of the silica of 1 ,900 or less , measurement method of average aggregated aggregate area:an upper surface of a specimen of the rubber composition after vulcanization is cut in a direction making an angle of 38° with respect to the upper surface of the specimen with a focused ion beam; then a smooth surface of the specimen formed by cutting is imaged with a scanning electron microscope at an acceleration voltage of 5 kV in a direction perpendicular to the smooth surface; the resulting image is ...

RUBBER COMPOSITION

The present invention provides a rubber composition containing: (A) a rubber component containing 10% by mass or more of at least one kind of rubber selected from diene rubber synthesized by emulsion polymerization and natural rubber and 90% by mass or less of another kind of diene rubber; (B) silica having a n-hexadecyltrimethylammonium bromide (CTAB) adsorption specific surface area of less than 140 m/g measured according to a method described in ASTM D3765-92; (C) at least one silane coupling agent selected from a polysulfide compound and a thioester compound; and (D) a vulcanization accelerator, the rubber composition after vulcanization having an average aggregated aggregate area (nm) of the silica of 3,300 or less, and thus provides a rubber composition that is improved in low-heat-generation property. 1. A rubber composition comprising: (A) a rubber component containing 10% by mass or more of at least one kind of rubber selected from diene rubber synthesized by emulsion polymerization and natural rubber and 90% by mass or less of another kind of diene rubber; (B) a silica having a n-hexadecyltrimethylammonium bromide (CTAB) adsorption specific surface area of less than 140 m/g measured according to a method described in ASTM D3765-92; (C) at least one silane coupling agent selected from a polysulfide compound and a thioester compound; and (D) a vulcanization accelerator , the rubber composition after vulcanization having an average aggregated aggregate area (nm) of the silica of 3 ,300 or less , measurement method of average aggregated aggregate area:an upper surface of a specimen of the rubber composition after vulcanization is cut in a direction making an angle of 38° with respect to the upper surface of the specimen with a focused ion beam; then a smooth surface of the specimen formed by cutting is imaged with a scanning electron microscope at an acceleration voltage of 5 kV in a direction perpendicular to the smooth surface; the resulting image is ...

Polymer-modified asphalt compositions

A modified-asphalt composition prepared by introducing a diene end-capped block copolymer with a molten asphalt composition, where the block copolymer is defined by the formula α-(D-V-d) x where each D is independently a polydiene block, each V is independently a vinyl aromatic block, each d is a polydiene end cap, α is a coupling moiety, and x is an integer from 2 to 10.

CYCLIC DIOL-DERIVED BLOCKED MERCAPTOFUNCTIONAL SILANE COMPOSITIONS

Diol derived blocked mercaptofunctional silane compositions in which the silanes comprise cyclic and bridged alkoxy groups derived from hydrocarbon-based diols and processes for their preparation are provided. Also provided are rubber compositions comprising the cyclic diol-derived blocked mercaptofunctional silanes, processes for their preparation and articles of manufacture comprising the rubber compositions, in particular, automotive tires and components thereof. 119-. (canceled)21. (canceled)23. (canceled)24. (canceled)25. The process of claim 20 , wherein the reaction temperature is about 40 to about 85° C. and the pressure is ambient.27. (canceled)28. (canceled)29. The process of claim 26 , wherein the phase transfer catalyst is selected from the group consisting of tetramethylammonium chloride claim 26 , tetramethylammonium bromide claim 26 , tetramethylammonium iodide claim 26 , tetramethylammonium hydroxide claim 26 , tetraethylammonium chloride claim 26 , tetraethylammonium bromide claim 26 , tetraethylammonium iodide claim 26 , tetraethylammonium hydroxide claim 26 , tetrabutylammonium chloride claim 26 , tetrabutylammonium bromide claim 26 , tetrabutylammonium iodide claim 26 , tetrabutylammonium hydroxide claim 26 , methyltributylammonium chloride claim 26 , methyltributylammonium bromide claim 26 , methyltributylammonium iodide claim 26 , methyltributylammonium hydroxide claim 26 , tetraoctylammonium chloride claim 26 , tetraoctylammonium bromide claim 26 , tetraoctylammonium iodide claim 26 , tetraoctylammonium hydroxide claim 26 , methyltrioctylammonium chloride claim 26 , methyltrioctylammonium bromide claim 26 , methyltrioctylammonium iodide claim 26 , methyltrioctylammonium hydroxide claim 26 , benzyltrimethylammonium chloride claim 26 , benzyltrimethylammonium bromide claim 26 , benzyltriethylammonium chloride claim 26 , benzyltributylammonium chloride claim 26 , dibenzyldimethylammonium chloride claim 26 , dibenzyldimethylammonium bromide claim ...

RUBBER COMPOSITION AND TIRE USING THE SAME

The invention relates to a rubber composition having better workability and fracture resistance than the prior art, and more specifically, to a rubber composition containing a polymer (B) obtained from an emulsion-polymerized polymer latex (A) having a number average molecular weight in the range of 1,000-130,000. 1. A rubber composition comprising a polymer (B) obtained from an emulsion-polymerized polymer latex (A) with a number average molecular weight in the range of 1 ,000 to 130 ,000.2. The rubber composition according to claim 1 , further comprising a polymer (D) obtained from an emulsion-polymerized polymer latex (C) with a number average molecular weight exceeding 130 claim 1 ,000.3. The rubber composition according to claim 2 , comprising a polymer (E) obtained by mixing the emulsion-polymerized polymer latex (A) with the emulsion-polymerized polymer latex (C) and then coagulating and drying the mixture.4. The rubber composition according to claim 3 , wherein the polymer (E) has a Mooney viscosity within the range of 10 to 200.5. The rubber composition according to claim 3 , wherein the polymer (E) has a molecular weight distribution (Mw/Mn) within the range of 3.0 to 7.0.6. The rubber composition according to claim 2 , wherein at least one of the emulsion-polymerized polymer latex (A) and the emulsion-polymerized polymer latex (C) is a latex of a diene-based polymer.7. The rubber composition according to claim 6 , wherein at least one of the emulsion-polymerized polymer latex (A) and the emulsion-polymerized polymer latex (C) is a latex of a copolymer of a diene compound and an aromatic vinyl compound.8. The rubber composition according to claim 7 , wherein a difference between a content of aromatic vinyl compound of the polymer (B) obtained from the emulsion-polymerized polymer latex (A) and a content of aromatic vinyl compound of the polymer (D) obtained from the emulsion-polymerized polymer latex (C) is 10 mass % or less.9. The rubber composition ...

TIRE WITH TREAD COMPRISED OF FUNCTIONALIZED ELASTOMER AND PRE-TREATED SILICA

The invention relates to a tire with tread of a rubber composition containing a functionalized elastomer and pre-hydrophobated precipitated silica reinforcement. 1. A rubber composition comprised of , based upon parts by weight per 100 parts by weight of rubber (phr): (1) at least one functionalized diene-based elastomer, or', '(2) combination of at least one functionalized diene-based elastomer and at least one non-functionalized diene-based elastomer where said combination contains greater than 50 percent (by weight) of said functionalized diene-based elastomer(s), and, '(A) 100 phr of at least one diene-based elastomer comprised of (1) precipitated silica, or', '(2) a combination of precipitated silica and rubber reinforcing carbon black containing up to about 65 phr of rubber reinforcing carbon black;', (a) pre-hydrophobated precipitated silica (precipitated silica hydrophobated prior to its addition to the rubber composition) and, optionally, a silica coupling agent added to said rubber composition, or', '(b) combination of pre-hydrophobated precipitated silica and hydropohilic precipitated silica and, optionally, a silica coupling agent added to said rubber composition,', (i) at least one of alkylsilane and alkoxysilane, or', '(ii) a combination of at least one of alkylsilane and alkoxysilane together with at least one of an organoalkoxysilyl polysulfide and organomercaptoalkoxysilane, or', '(iii) at least one of an organoalkoxysilyl polysulfide and organomercaptoalkoxysilane,, 'wherein said pre-hydrophobated precipitated silica is hydrophobated prior to its addition to the rubber composition by treatment with, (iv) at least one of alkylsilane and alkoxysilane, or', '(v) a combination of at least one of alkylsilane and alkoxysilane together with at least one of an organoalkoxysilyl polysulfide and organomercaptoalkoxysilane, or', '(vi) at least one of an organoalkoxysilyl polysulfide and organomercaptoalkoxysilane, and, 'wherein said precipitated silica ...

Rubber composition for tread, and pneumatic tire

The present invention provides a rubber composition for a tread, having improved abrasion resistance, heat aging resistance, processability, and fuel economy in a balanced manner, and a pneumatic tire formed therefrom. The present invention relates to a rubber composition for a tread, comprising a rubber component, silica, a silane coupling agent, a sulfur vulcanizing agent, a sulfenamide or thiazole vulcanization accelerator 1, and a thiuram vulcanization accelerator 2.

Rubber composition including a 1,2,4-triazine derivative

A rubber composition for manufacturing tyres is based on one or more diene elastomers, one or more reinforcing fillers, and a vulcanization system. The vulcanization system includes one or more 1,2,4-triazine compounds chosen from compounds of formula I and compounds of formula II: Certain specific 1,2,4-triazine derivatives are described.

TRIAZINANES AND METHODS OF MAKING THEM

The present invention is directed to compounds represented by the formula: Formula (i) wherein Rcomprises a hydrogen atom or an alkyl group having 1 to 2 carbon atoms; wherein Rcomprises an alkylene group, an arylene group, or a heterocyclic group; and wherein M comprises a monovalent metallic cation such as sodium, lithium, or potassium; or a multivalent metallic cation such as zinc, nickel, iron, titanium, or cobalt; or an ammonium or alkyl ammonium cation derived by addition of proton (s) to a nitrogenous base. 2. The compound of claim 1 , wherein R1 comprises a hydrogen atom;wherein R2 comprises an alkylene group having from 1 to 5 carbon atoms; andwherein M comprises a monovalent metallic cation.3. The compound of claim 1 , wherein R1 comprises hydrogen;wherein R2 comprises an alkylene group having from 1 to 3 carbon atoms; andwherein M comprises a monovalent metallic cation or an ammonium or alkyl ammonium cation derived by addition of one or more protons to a nitrogenous base.4. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(ethane-2 claim 1 ,1-diyl)) tris(sulfurothioate).5. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(propane-3 claim 1 ,1-diyl)) tris(sulfurothioate).6. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(butane-4 claim 1 ,1-diyl)) tris(sulfurothioate).7. Sodium S claim 1 ,S′ claim 1 ,S″-((1 claim 1 ,3 claim 1 ,5-triazinane-1 claim 1 ,3 claim 1 ,5-triyl)tris(pentane-5 claim 1 ,1-diyl)) tris(sulfurothioate).8. A method of making the compound of claim 1 , comprising:reacting a haloalkylamine hydrohalide with a metal thiosulfate to obtain an alkylammonium halide thiosulfate metal salt;deprotonating the alkylammonium halide thiosulfate metal salt to obtain an alkylammonium thiosulfate metal salt; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'reacting the alkylammonium ...

METHOD TO PREPARE TREADS FOR TYRES, RUBBER COMPOUND, TREAD PORTION AND WINTER TYRE

A method of producing a rubber compound for a tread portion designed to assume, with use, a porous surface with a 75 to 800 μm pore area. The method includes a first mixing step, in which a polymer base, recycled rubber, and silica are mixed together; and a second mixing step, in which a curing system is added and mixed to the compound from the first mixing step. 5 to 20 phr of recycled rubber is added at the first mixing step. The recycled rubber is 75 to 800 um in size, and is treated beforehand cryogenically. And the polymer base is selected from SBR, BR, NR and mixtures thereof. The invention also relates to a rubber compound for producing a tread portion, a tread portion and a winter tyre comprising said tread portion. 1. A method for obtaining a tread portion that during its use assumes a porous surface with a 75 to 800 μmpore area; said method comprising a preparation phase of a rubber compound , wherein:in a first mixing step a polymer base selected from SBR, BR, NR and mixtures thereof, 5 to 20 phr of recycled rubber having 75 to 800 μm in size, and silica are mixed together; andin a second mixing step a curing system is added and mixed to the compound from the first mixing step;said method being characterized by the fact that said recycled rubber is treated beforehand cryogenically and is added to said first mixing step without being beforehand pre-mixed with any polymer base.2. A method as claimed in claim 1 , characterized in that said recycled rubber is 100 to 200 μm in size.3. A method of producing tread compounds claim 1 , as claimed in claim 1 , characterized in that said recycled rubber is tyre rubber.45-. (canceled) The present invention relates to a tyre tread production method.One long-used method of improving tyre grip in wet-road and winter conditions is to form a porous surface on the tread. The pores increase the tread-road contact area, as well as allowing run-off of the water layer that forms between the tread and the road surface.To obtain ...

A TIRE COMPRISING A RUBBER COMPOSITION

A tire comprises a rubber composition based on at least an elastomer matrix comprising 20 to 70 phr of a first diene elastomer bearing at least one SiOR function, R being a hydrogen atom or a hydrocarbon radical, the SiOR function not located at the chain ends of the first diene elastomer, 20 to 70 phr of a second diene elastomer which is a polyisoprene, and optionally, 0 to 20 phr of a third diene elastomer; and a reinforcing filler comprising a reinforcing inorganic filler. 117.-. (canceled)18. A tire comprising a rubber composition based on at least:an elastomer matrix comprising 20 to 70 phr of a first diene elastomer bearing at least one SiOR function, R being a hydrogen atom or a hydrocarbon radical, the SiOR function not located at the chain ends of the first diene elastomer, 20 to 70 phr of a second diene elastomer which is a polyisoprene, and optionally, 0 to 20 phr of a third diene elastomer; anda reinforcing filler predominantly comprising a reinforcing inorganic filler.19. The tire according to claim 18 , wherein the first diene elastomer is a styrene-butadiene copolymer.20. The tire according to claim 18 , wherein the first diene elastomer further bears at least one amine function.21. The tire according to claim 20 , wherein the SiOR function bears the amine function.22. The tire according to claim 18 , wherein R of the SiOR function is a hydrocarbon radical.23. The tire according to claim 18 , wherein the first diene elastomer has a glass transition temperature of lower than −40° C.24. The tire according to claim 18 , wherein the elastomer matrix comprises 30 to 60 phr of the first diene elastomer.25. The tire according to claim 18 , wherein the elastomer matrix comprises 30 to 60 phr of the second diene elastomer.26. The tire according to claim 18 , wherein the second diene elastomer comprises more than 50% by weight of natural rubber per 100% by weight of the second diene elastomer.27. The tire according to claim 18 , wherein the elastomer matrix ...

TIRE TREAD COMPRISING AT LEAST ONE METAL CHELATE AND/OR A PIGMENT

A tire tread is based on one or more diene elastomers, on one or more reinforcing fillers, on a crosslinking system, and on at least one compound (A) selected from a metal chelate comprising at least one ligand and at least one metal, a pigment and their mixture. 115.-. (canceled)16. A tire tread based on:one or more diene elastomers;one or more reinforcing fillers;a crosslinking system; andat least one compound A selected from the group consisting of a metal chelate comprising at least one ligand and at least one metal, a pigment and the mixture thereof.17. The tread according to claim 16 , wherein the at least one ligand is selected from cyclic tetrapyrrole derivatives selected from the group consisting of chlorins claim 16 , bacteriochlorins claim 16 , porphyrins claim 16 , hemins and phthalocyanines.18. The tread according to claim 17 , wherein the at least one ligand is selected from the group consisting of porphyrins and phthalocyanines.19. The tread according to claim 16 , wherein the at least one metal is selected from the group consisting of copper claim 16 , cobalt and iron.20. The tread according to claim 19 , wherein the at least one metal is iron.21. The tread according to claim 16 , wherein the metal chelate is selected from the group consisting of iron porphyrins claim 16 , iron hemiporphyrazine claim 16 , iron hemin claim 16 , iron phthalocyanines and copper phthalocyanines.22. The tread according to claim 21 , wherein the metal chelate is iron porphines.24. The tread according to claim 16 , wherein the pigment is selected from the group consisting of diketopyrrolopyrroles claim 16 , anthraquinones claim 16 , quinacridones claim 16 , perylenes and pyrazolo-quinazolones.25. The tread according to claim 24 , wherein the pigment is a diketopyrrolopyrrole.26. The tread according to claim 16 , wherein the pigment is selected from the group consisting of Red 254 claim 16 , Red 255 claim 16 , Red 257 and Red 264.27. The tread according to claim 26 , wherein ...

Rubber composition, modified polymer, and tire

An object of the present invention is to provide a modified polymer that can realize a rubber composition having excellent low heat build-up and that has excellent productivity, a rubber composition containing the modified polymer, and a tire produced using the rubber composition. The modified polymer of the present invention is obtained by reacting a modifier having a nitrone group and a carboxy group with a conjugated diene polymer not containing a tetrasubstituted olefin and/or a trisubstituted olefin.

POLYMERS INCORPORATING HYDROXYL GROUP-CONTAINING METHYLSTYRENE

Vulcanizates with desirable properties can be obtained from compounds incorporating polymers that include hydroxyl group-containing α-methylstyrene functionalities. The functionalities can be incorporated by using any or all of appropriate initiators, monomers and optional terminating compounds. Such polymers exhibit excellent interactivity with both conventional and non-conventional fillers. 2. The process of wherein said at least one type of polyene is polymerized before said compound is polymerized.3. The process of further comprising hydrolyzing each of said protecting groups so as to provide hydroxyl groups.4. The process of wherein m is 2.5. The process of wherein the two OGgroups are bonded to adjacent ring C atoms of the phenyl group.6. The process of wherein m is 2.7. The process of wherein the two OGgroups are bonded to adjacent ring C atoms of the phenyl group.8. The process of further comprising hydrolyzing each of said protecting groups so as to provide hydroxyl groups.9. The process of wherein m is 2.10. The process of wherein the two OGgroups are bonded to adjacent ring C atoms of the phenyl group.11. The process of wherein m is 2.12. The process of wherein the two OGgroups are bonded to adjacent ring C atoms of the phenyl group.13. The process of wherein each Gis a trialkylsilyl halide.14. The process of further comprising recovering and isolating and blending said polymer with ingredients that comprise at least one particulate filler so as to provide a rubber composition.15. The process of wherein said at least one particulate filler comprises carbon black.16. The process of wherein said rubber composition further comprises a vulcanizing agent.17. The process of further comprising vulcanizing said rubber composition so as to provide a vulcanizate claim 16 , said vulcanizate optionally being a tire component.18. The process of wherein said at least one particulate filler further comprises silica.19. The process of wherein said rubber composition ...

Functionalized elastomer, method of making, and uses thereof

A method of preparing functionalized elastomers, including epoxy ring-opening an epoxidized elastomer with a C 1 -C 32 hydrocarbyl-substituted thiol to provide a functionalized elastomer comprising an epoxy functional group, a hydroxy functional group, and a C 1 -C 32 hydrocarbyl-substituted thio functional group. The hydroxy functional group and the C 1 -C 32 hydrocarbyl-substituted thio functional group are vicinal functional groups.

ELASTOMERIC COMPOSITIONS COMPRISING VINYL ACETAL POLYMERS

An elastomeric composition is provided comprising at least one vulcanizable unsaturated hydrocarbon elastomeric compound, at least one non-fibril, water insoluble vinyl acetal polymer, at least one filler, and optionally at least one coupling agent. A process of making the elastomeric composition is also provided as well as articles comprising the elastomeric composition. In particular, tires comprising the elastomeric composition are provided wherein the handling and processing characteristics are improved while other performance characteristics are retained. 1. A process for producing an elastomeric composition , said process comprising mixing at least one vulcanizable unsaturated hydrocarbon elastomer , at least one non-fibril , water insoluble vinyl acetal polymer , at least one filler , and optionally at least one coupling agent.2. The process according to wherein said elastomer is selected from the group consisting of natural rubber (NR) claim 1 , styrene-butadiene rubber (SBR) claim 1 , butadiene rubber (BR) claim 1 , nitrile rubber (NBR) claim 1 , 1 claim 1 ,4-cis polybutadiene claim 1 , polychloroprene claim 1 , 1 claim 1 ,4-cis polyisoprene claim 1 , halogenated or non-halogenated isoprene-isobutene copolymers claim 1 , butadiene-acrylonitrile claim 1 , styrene-butadiene-isoprene terpolymers and derivatives and mixtures thereof.4. The process according to wherein said non-fibril claim 3 , water insoluble vinyl acetal polymer has about 25 wt % to about 95 wt % of vinyl acetal monomer units claim 3 , from about 2 wt % to about 40 wt % vinyl alcohol monomer units claim 3 , and 0 wt % to 40 wt % vinyl acetate monomer units.5. The process according to wherein said non-fibril claim 1 , water insoluble vinyl acetal polymer is polyvinyl formal and wherein said polyvinyl formal has about 25 wt % to about 95 wt % of vinyl acetal monomer units claim 1 , from about 2 wt % to about 40 wt % vinyl alcohol monomer units claim 1 , and 0 wt % to 40 wt % vinyl acetate ...

PNEUMATIC TIRE

A pneumatic tire comprising a tread composed of a rubber composition, the rubber composition containing 30 to 120 parts by mass of silica having a BET specific surface area of 180 to 280 m/g based on 100 parts by mass of a rubber component, wherein, under a normal state with no load where the pneumatic tire is mounted with a normal rim and filled with a normal internal pressure, a grounding surface shape in which a normal load is applied and the tread is pressed against a plane surface satisfies the following equation (1): 0.95≤SL0/SL80≤1.6 (wherein, SL0 is a ground contact length in a circumferential direction of the tire on a tire equator, and SL80 is a ground contact length in a circumferential direction of the tire on a position away from the tire equator by a distance in a tire axial direction of 80% of a tread grounding half width.) 2. The pneumatic tire of claim 1 , wherein the rubber composition further contains carbon black.3. The pneumatic tire of or claim 1 , wherein the rubber composition further contains a silane coupling agent.4. The pneumatic tire of claim 1 , wherein the tread has a JIS A hardness of 55 to 80. The present invention relates to a pneumatic tire comprising a tread composed of a rubber composition containing a rubber component and a predetermined amount of a fine particle silica.In recent years, as market demands have increased, it has been required for a longer service life of and a higher durability of a tire and for improvement in abrasion resistance of a tread rubber.On the other hand, at the same time, it has also been required for reduction in rolling resistance of a tire due to demand for a low fuel consumption, and silica is generally used as a reinforcing filler for a high-performance tire for a passenger car.Further, Patent Document 1 discloses that a high-performance studless tire can be provided which has both a good braking force and steering stability on ice and snow by using a rubber composition containing 0.5 to 5.0 parts ...

Tire Compositions and Methods for Making Thereof

A tire composition is disclosed. The composition comprises a rubber component and based on 100 parts by weight (phr) of the rubber component, 50-200 phr of covered silica, with the covered silica comprising silica core and a first resin covering the silica core, wherein the first resin is not chemically bonded to the silica core. The silica core is covered with the first resin by mixing a slurry comprising silica core with a mixture containing the first resin as a solution, an aqueous dispersion; or a solution by dissolving the first resin in a solvent. 1. A tire composition comprising a blend of:a rubber component and based on 100 parts by weight (phr) of the rubber component;from 50 phr to 200 phr of a resin-covered silica having an average primary particle size of <1000 μm,from 50 phr to 200 phr of at least one filler;from 0 phr to 50 phr of a plasticizer; andfrom 0 to 50 phr of a second resin,wherein the resin-covered silica is formed in a process consisting essentially of coating finely divided silica with a composition consisting essentially of a first resin to coat at least a surface of the finely divided silica forming the resin-covered silica as separate silica particles coated with the first resin,wherein the first resin is not chemically bonded to the finely divided silica, andwherein the first resin and the second resin are the same or different, and selected from the group consisting of:a coumarone-indene resin consisting of coumarone and indene repeat units,a petroleum hydrocarbon resin, consisting of petroleum hydrocarbon repeat units, and optionally, aliphatic olefin units, phenol units, or cresol units;a terpene-based resin selected from the group consisting of a polyterpene resin and a terpene phenol resin, wherein the polyterpene resin consists of terpene repeat units; and the terpene phenol resin consists of terpene and phenol repeat units;a styrene-alpha-methylstyrene resins consisting of styrene and alpha-methylstyrene repeat units,rosin ...

TIRE TREAD WITH LOW TG RUBBER

Rubber compositions and articles made such rubber compositions having at least 80 phr of a styrene-butadiene elastomer modified with a functional group that is capable of interacting with a silica reinforcing filler and having a glass transition temperature of between −60° C. and less than −40° C. The rubber compositions may also include an effective amount of a plasticizing system having a plasticizing resin and a plasticizing liquid, wherein the effective amount of the plasticizing system provides the rubber composition with a shear modulus G* measured at 60° C. of between 0.9 MPa and 1.5 MPa and a Tg of between −35° C. and −15°. The filler for the rubber compositions is silica and there is further a curing system. 1. A tread for a tire , the tread comprising a rubber composition that is based upon a cross-linkable elastomer composition , the cross-linkable elastomer composition comprising , per 100 parts by weight of rubber (phr):greater than 85 phr of a styrene-butadiene elastomer modified with a functional group that is capable of interacting with a silica reinforcing filler and having a glass transition temperature of between −60° C. and less than −40° C.;between 0 phr and less than 15 phr of an additional highly unsaturated diene elastomer;an effective amount of a plasticizing system that includes 3 phr and 40 phr of a plasticizing resin having a glass transition temperature (Tg) of at least 25° C. and a plasticizing liquid, wherein the effective amount of the plasticizing system provides the rubber composition with a shear modulus G* measured at 60° C. of between 0.9 MPa and 1.5 MPa and a Tg of between −35° C. and −15°;between 45 phr and 95 phr of a silica reinforcing filler; anda curing system.2. The tread of claim 1 , wherein the cross-linkable elastomer composition comprises 100 phr of the styrene-butadiene elastomer.3. The tread of claim 1 , wherein the butadiene portion of the styrene-butadiene elastomer has a vinyl-1 claim 1 ,2 content of less than 35 ...

Rubber Composition and Pneumatic Tire Using Same

A rubber composition contains a diene rubber including a styrene-butadiene copolymer component including a styrene-butadiene copolymer and a reinforcing filler. (1) The bonded styrene content is from 5 to 50 wt. %. (2) The total amount of styrene of an ozone decomposed component S1 including one styrene-derived unit and an ozone decomposed component S1V1 including one styrene-derived unit and one 1,2-bonded butadiene-derived unit is less than 80 wt. % of the amount of bonded styrene. The total amount of styrene of the decomposed component S1V1 is less than 10 wt. % of the amount of bonded styrene. (3) The integrated intensity of an ozone decomposed component S1V2 including one styrene-derived unit and two 1,2-bonded butadiene-derived units is less than 15% of the integrated intensity of all decomposed components including styrene-derived units. (4) The vinyl content of a butadiene portion is not less than 20% and less than 50%. 1. A rubber composition comprising a diene rubber containing at least one type of styrene-butadiene copolymer and a reinforcing filler , a styrene-butadiene copolymer component including the at least one type of styrene-butadiene copolymer having the characteristics of (1) to (4):(1) a bonded styrene content is from 5 to 50 wt. %;(2) when a decomposed component S1 including one styrene-derived unit and a decomposed component S1V1 including one styrene-derived unit and one 1,2-bonded butadiene-derived unit are measured by gel permeation chromatography as decomposed components obtained by ozone decomposition, a total amount of styrene of the decomposed component S1 and the decomposed component S1V1 is less than 80 wt. % of the amount of bonded styrene, and a total amount of styrene of the decomposed component S1V1 is less than 10 wt. % of the amount of bonded styrene;(3) when the decomposed components obtained by ozone decomposition are measured by a liquid chromatography-mass spectrometer, an integrated intensity of a decomposed component S1V2 ...

RUBBER COMPOSITION AND PNEUMATIC TIRE

The present invention provides a rubber composition which provides a balanced improvement of initial wet grip performance, wet grip performance after aging, fuel economy, and abrasion resistance. Also provided is a pneumatic tire formed from the rubber composition. The rubber composition contains: a rubber component including a diene rubber; and a glycerol fatty acid triester of plant origin. The glycerol fatty acid triester has a content of saturated fatty acids of 10 to 25% by mass and a content of monovalent unsaturated fatty acids having one unsaturated bond of less than 50% by mass, each based on 100% by mass of the constituent fatty acids of the triester. 1. A rubber composition , comprising:a rubber component including a diene rubber; anda glycerol fatty acid triester of plant origin,the glycerol fatty acid triester having a content of saturated fatty acids of 10 to 25% by mass and a content of monovalent unsaturated fatty acids having one unsaturated bond of less than 50% by mass, each based on 100% by mass of constituent fatty acids of the triester.2. The rubber composition according to claim 1 ,wherein the glycerol fatty acid triester has a content of polyvalent unsaturated fatty acids having two or more unsaturated bonds of 50% by mass or more based on 100% by mass of the constituent fatty acids.3. The rubber composition according to claim 1 , {'br': None, '80≤the content (% by mass) of monovalent unsaturated fatty acids having one unsaturated bond based on 100% by mass of the constituent fatty acids×1 (the number of unsaturated bonds)+the content (% by mass) of divalent unsaturated fatty acids having two unsaturated bonds based on 100% by mass of the constituent fatty acids×2 (the number of unsaturated bonds)+the content (% by mass) of trivalent unsaturated fatty acids having three unsaturated bonds based on 100% by mass of the constituent fatty acids×3 (the number of unsaturated bonds)≤200.'}, 'wherein the glycerol fatty acid triester satisfies the ...

Strip for reinforcement of a hose and a method of manufacture thereof

A strip (100) intended for the reinforcement of the wall of high pressure hoses or flexible pipes is presented. The strip (100) comprises multiple wires (102) arranged side-by-side and held together by means of a hardened adhesive (104) originating from a waterborne dispersion. Different embodiments are presented wherein the wires (102) are embedded in the hardened adhesive (104), or wherein only one side of the strip (100) is covered with hardened adhesive (104) or wherein the hardened adhesive (104) is present only between the wires (102) and not on the surfaces (S1, S2) delineating the strip (100). In one preferred embodiment the wires (102) are flattened with the flats being parallel to the surfaces (S1, S2) of the strips (100).

FUNCTIONALIZED PROCESSING AID, PREPARATION METHOD THEREOF, AND RUBBER COMPOSITION INCLUDING THE SAME

Embodiments of the present invention provide a functionalized processing aid represented by the following Chemical Formula 1 in which a silane-based compound and a cardanol-derived structure are combined, a preparation method thereof, and a rubber composition including the same: 2. The functionalized processing aid of claim 1 , wherein a molar ratio of the silane-based compound and the cardanol-derived structure is 1:2 to 8.3. The functionalized processing aid of claim 1 , wherein the silane-based compound is at least one selected from the group consisting of 1-(trimethoxysilyl)methanamine claim 1 , 1-(triethoxysilyl)methanamine claim 1 , 2-(trimethoxysilyl)ethanamine claim 1 , 2-(triethoxysilyl)ethanamine claim 1 , 3-aminopropyltrimethoxysilane claim 1 , 3-aminopropyltriethoxysilane claim 1 , 4-aminobutyltrimethoxysilane claim 1 , 4-aminobutyltriethoxysilane claim 1 , 3-aminopropylmethyldimethoxysilane claim 1 , 3-aminopropylmethyldiethoxysilane claim 1 , 3-aminopropylethyldimethoxysilane claim 1 , 3-aminopropylethyldiethoxysilane claim 1 , 3-aminopropyldimethylmethoxysilane claim 1 , 3-aminopropyldimethylethoxysilane claim 1 , 3-aminopropyldiethylmethoxysilane claim 1 , 3-aminopropyldiethylethoxysilane claim 1 , N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane claim 1 , N-2-(aminoethyl)-3-aminopropylmethyldimethoxysilane claim 1 , N-2-(aminoethyl)-3-aminopropyltrimethoxysilane claim 1 , N-(3-(trimethoxysilyl] propyl)butylamine claim 1 , diethylenetriaminepropyltrimethoxysilane claim 1 , diethylaminomethyltriethoxysilane claim 1 , N-phenyl-3-aminopropyltrimethoxysilane claim 1 , (N-phenylamino)methyltriethoxysilane claim 1 , and N-(3-aminopropyl)cyclohexaneamine.4. The functionalized processing aid of claim 1 , wherein the silane-based compound is at least one selected from the group consisting of 1-(trimethoxysilyl)methanethiol claim 1 , 1-(triethoxysilyl)methanethiol claim 1 , 2-(trimethoxysilyl)ethanethiol claim 1 , 2-(triethoxysilyl)ethanethiol claim 1 , 3- ...

RUBBER COMPOSITION FOR CONVEYOR BELTS, RUBBER FOR CONVEYOR BELT COVERS, AND CONVEYOR BELT

Rubber composition for conveyor belts containing (A) a rubber component that contains a styrene-butadiene rubber mixture having a mean styrene content of from 28 to 35% by mass, which contains one or more types of styrene-butadiene rubber having a styrene content of from 20 to 25% by mass and one or more types of styrene-butadiene rubber having a styrene content of from more than 25 to 50% by mass, and at least one selected from butadiene rubber and natural rubber in a specific ratio, (B) silica, (C) resin, and (D) specific carbon black in a specific ratio; a rubber for conveyor belt covers, formed by using the rubber composition; and a conveyor belt cover provided by using the rubber composition. 1. A rubber composition for conveyor belts , which contains , relative to (A) 100 parts by mass of a rubber component therein containing from 100 to 70 parts by mass of styrene-butadiene rubber and from 0 to 30 parts by mass of at least one selected from butadiene rubber and natural rubber , (B) from 5 to 20 parts by mass of silica , (C) from 10 to 30 parts by mass of resin , and (D) from 40 to 70 parts by mass of carbon black having a nitrogen adsorption specific surface area , which is measured according to JIS K 6217-2:2001 , of 100 m/g or more , and wherein the styrene-butadiene rubber is a styrene-butadiene rubber mixture having a mean styrene content of from 28 to 35% by mass , which contains one or more types of styrene-butadiene rubber having a styrene content of from 20 to 25% by mass and one or more types of styrene-butadiene rubber having a styrene content of from more than 25 to 50% by mass.2. The rubber composition for conveyor belts according to claim 1 , wherein the styrene-butadiene rubber mixture contains from 40 to 70% by mass of styrene-butadiene rubber having a styrene content of from 20 to 25% by mass and from 30 to 60% by mass of styrene-butadiene rubber having a styrene content of from more than 25 to 50% by mass.3. A rubber for conveyor belt covers ...

Conjugated diene polymer production method, and conjugated diene polymer composition production method

A method for producing a conjugated diene-based polymer is provided, in which compounds of formulas (2) and (3) and a conjugated diene compound are polymerized using a compound of formula (1), and then a compound containing a nitrogen atom and/or a silicon atom is reacted with an active end of the polymer formed via the polymerization, R 11 represents a hydrocarbylene group, R 12 and R 13 each represent an optionally substituted hydrocarbyl group or a trihydrocarbylsilyl group, or R 12 is bonded to R 3 and the group in which R 12 is bonded to R 13 represents a hydrocarbylene group optionally having a nitrogen and/or oxygen atom, —Si(R 14 ) 2 —(CH 2 ) x —Si(R 14 ) 2 —, or —Si(R 15 ) 2 —(CH 2 ) y − , and M represents an alkali metal atom, E 2 -A 2   (2) E 3 -A 3   (3) E 2 and E 3 each represent a hydrocarbyl group having a polymerizable carbon-carbon double bond, A 2 represents a substituted amino group or a nitrogen-containing heterocyclic group, and A 3 represents a substituted silyl group.

BLOCKED MERCAPTOSILANE COUPLING AGENT

A blocked mercaptosilane of following general formula (I): 2. The mercaptosilane according to claim 1 , wherein Z comprises one or more heteroatoms selected from the group consisting of O claim 1 , S and N.3. The mercaptosilane according to claim 1 , wherein:{'sup': '1', 'Ris selected from the group consisting of methyl, ethyl, n-propyl and isopropyl;'}A is chosen from alkyls having from 1 to 18 carbon atoms and the phenyl radical;{'sub': 1', '18', '6', '12, 'sup': '-', 'Z is chosen from C-Calkylenes and CCarylenes.'}4. The mercaptosilane according to claim 3 , wherein Z is chosen from C-Calkylenes.5. The mercaptosilane according to claim 4 , wherein Z is chosen from C-Calkylenes.6. The mercaptosilane according to claim 3 , wherein Ris a methyl.7. The mercaptosilane according to claim 3 , wherein A is chosen from alkyls having from 1 to 7 carbon atoms and the phenyl radical.8. The mercaptosilane according to any one claim 3 , wherein Ris methyl claim 3 , Z is a propylene and A is a heptyl.9. A process for producing a mercaptosilane according to claim 1 , comprising: {'br': None, 'sup': 2', '1, 'sub': '2', '(RO) RSi—Z—S—C (═O)—A'}, 'providing a starting material that is a blocked mercaptosilane (hereinafter product B) of formula (B)wherein:{'sup': '1', 'R, A and Z have the same meanings as in the formula (I);'}{'sup': '2', 'R, which are identical or different, represent a monovalent hydrocarbon group chosen from alkyls having from 1 to 6;'}hydrolyzing product B in an acidic medium, thereby producing the targeted blocked mercaptosilane of formula (I).10. A method of coupling an inorganic filler to a diene elastomer comprising introducing a coupling agent comprising a mercaptosilane according to any one of .11. The method according to claim 11 , wherein the inorganic filler claim 11 , the diene elastomer claim 11 , and the coupling agent form a rubber composition.12. A rubber composition based on components comprising a diene elastomer claim 1 , a reinforcing inorganic ...

RUBBER COMPOSITIONS

[Object] 1: A rubber composition , comprising100 parts by mass of a solid rubber (A),0.1 to 10 parts by mass of a modified liquid diene rubber (B) that is obtained by adding a modifying agent to an unmodified liquid diene rubber (B′) and has functional groups derived from the modifying agent, and20 to 150 parts by mass of a filler (C),wherein the modified liquid dime rubber (B) satisfies the following conditions (i) to (iv):(i) the modified liquid diene rubber (B) has a content of isoprene units of not less than 50 mass % relative to a total of all monomer units,(ii) the modified liquid diene rubber (B) has a weight average molecular weight (Mw) of 25,000 to 120,000,(iii) an amount of the modifying agent added is 3 to 40 parts by mass per 100 parts by mass of the unmodified diene rubber (B′), and(iv) an average number of functional groups per molecule of the modified liquid diene rubber (B) is 15 to 80.2: The rubber composition according to claim 1 , wherein the functional groups in the modified diene rubber (B) are at least one selected from the group consisting of a carboxylic anhydride group claim 1 , a dicarboxylic acid monoester group claim 1 , and a dicarboxylic acid monoamide group.3: The rubber composition according to claim 2 , wherein the functional groups in the modified liquid diene rubber (B) are at least one selected from the group consisting of a maleic anhydride group claim 2 , a succinic anhydride group claim 2 , a maleic acid monoester group claim 2 , a succinic acid monoester group claim 2 , a maleic acid monoamide group claim 2 , and a succinic acid monoamide group.4: The rubber composition according to claim 1 , wherein the modified liquid diene rubber (B) has a functional group equivalent weight of 200 to 5 claim 1 ,500 g/eq.5: The rubber composition according to claim 1 , wherein the filler (C) is at least one filler selected from the group consisting of a carbon black and a silica.6: A crosslinked product claim 1 , obtained by a process ...

RUBBER COMPOSITION AND PNEUMATIC TIRE

A rubber composition contains 100 parts by mass of a rubber component comprising diene rubber, and from 1 to 100 parts by mass of a (meth)acrylate polymer having a weight average molecular weight of from 5,000 to 1,000,000 and a glass transition point of from −70 to 0° C. A pneumatic tire is obtained using the rubber composition. 1. A rubber composition comprising: 100 parts by mass of a rubber component comprising diene rubber , and from 1 to 100 parts by mass of a (meth)acrylate polymer having a weight average molecular weight of from 5 ,000 to 1 ,000 ,000 and a glass transition point of from −70 to 0° C.5. The rubber composition according to claim 3 , wherein Z in the general formula (2) is an alkylene group having from 5 to 15 carbon atoms.6. The rubber composition according to claim 1 , wherein the (meth)acrylate polymer is a (meth)acrylate polymer that does not have a reactive silyl group at the end thereof.8. The rubber composition according to claim 1 , wherein the (meth)acrylate polymer is a (meth)acrylate polymer synthesized by radical polymerization using an initiator comprising an azo compound.9. The rubber composition according to claim 1 , wherein the (meth)acrylate polymer is a star polymer synthesized using a polyfunctional initiator.10. The rubber composition according to claim 1 , wherein the (meth)acrylate polymer is a polymer of a monomer comprising isodecyl methacrylate.11. A pneumatic tire using the rubber composition according to . The present invention relates to a rubber composition and a pneumatic tire using the same.Conventionally, for example, it is required in a rubber composition used in a tire to balance grip performance on a wet road surface (wet grip performance) and rolling resistance performance contributing to low fuel consumption in high dimension. However, those performances are conflicting characteristics, and it is not easy to simultaneously improve those characteristics.Patent Document 1 proposes to add a copolymer resin of a ...

RUBBER COMPOSITION, INNER LINER MATERIAL, AND PNEUMATIC TIRE

Provided is a rubber composition having superior gas-barrier properties. More specifically, the rubber composition contains a layered compound and a modified conjugated diene-based polymer having a functional group that interacts with the layered compound. 1. A rubber composition comprising a layered compound , and a modified conjugated diene-based polymer having a functional group that interacts with the layered compound.2. The rubber composition according to claim 1 , wherein the functional group that interacts with the layered compound is at least one of a nitrogen-containing functional group or an oxygen-containing functional group.3. The rubber composition according to claim 2 , wherein the nitrogen-containing functional group is at least one selected from a group composed of a substituted or unsubstituted amino group claim 2 , a substituted or unsubstituted amide group claim 2 , and a substituted or unsubstituted imino group claim 2 , and the oxygen-containing functional group is a substituted or unsubstituted alkoxy silyl group.4. The rubber composition according to claim 1 , further comprising a butyl-based rubber.5. The rubber composition according to claim 4 , wherein the butyl-based rubber is selected from 1) butyl rubber claim 4 , 2) halogenated butyl rubber claim 4 , and 3) a copolymer obtained by polymerizing (a) isobutylene and (b) a vinyl compound containing a halogen group with a cationic polymerization initiator claim 4 , or a copolymer obtained by polymerizing (a) isobutylene claim 4 , (b) the vinyl compound containing the halogen group or (a) isobutylene claim 4 , (c) an aromatic vinyl compound containing the halogen group claim 4 , and (d) a vinyl compound having no halogen group with a cationic polymerization initiator.6. The rubber composition according to claim 5 , wherein a blend ratio (Y/X) of the modified conjugated diene-based polymer (X) and the butyl-based rubber (Y) is 99.5/0.5 to 40/60.7. The rubber composition according to claim 1 , ...

RUBBER COMPOSITION FOR TIRE TREAD, AND PNEUMATIC TIRE USING SAME

A rubber composition for a tire tread comprising: a diene rubber; a silica having an NSA of from 194 to 225 m/g and a CTAB of from 180 to 210 m/g; and a polysiloxane represented by the average composition formula of formula (1) and contained in an amount of from 1 to 20 mass % with respect to the quantity of silica. (A)(B)(C)(D)(R)SiO. Also provided is a pneumatic tire having tire treads formed using the rubber composition. 1. A rubber composition for a tire tread comprising a diene rubber , silica , and a sulfur-containing silane coupling agent;{'sup': 2', '2, 'a nitrogen adsorption specific surface area of the silica being from 194 to 240 m/g; a CTAB specific surface area of the silica being from 180 to 215 m/g; a content of the silica being from 60 to 200 parts by mass per 100 parts by mass of the diene rubber;'} {'br': None, 'sub': a', 'b', 'c', 'd', 'e', '(4-2a-b-c-d-e)/2, 'sup': '1', '(A)(B)(C)(D)(R)SiO\u2003\u2003(1)'}, 'the sulfur-containing silane coupling agent being a polysiloxane represented by the following formula (1); and a content of the sulfur-containing silane coupling agent being from 1 to 20 mass % with respect to the content of the silica;'}{'sup': '1', 'formula (1) being an average composition formula, wherein A is a divalent organic group containing a sulfide group; B is a monovalent hydrocarbon group having from 5 to 10 carbon atoms; C is a hydrolyzable group; D is an organic group containing a mercapto group; Ris a monovalent hydrocarbon group having from 1 to 4 carbon atoms; and a to e satisfy the relational expressions 0≦a<1, 0≦b<1, 0 Подробнее

POLYBUTENE DERIVATIVE FOR RUBBER COMPOUNDING AND RUBBER COMPOSITION INCLUDING SAME

Disclosed is a polybutene derivative for rubber compounding. The polybutene derivative includes 30% to 98% by weight of polyisobutylene, 1% to 35% by weight of unsaturated dicarboxylic anhydride, and 1% to 50% by weight of at least one selected from among alkanolamines, amine-based compounds, and polyhydric alcohols. When the polybutene derivative is added as an additive for rubber, the polybutene derivative dramatically improves the dispersibility of a filler and improves both the grip performance and the rolling resistance at the same time. 1. A polybutene derivative for rubber compounding , the polybutene derivative comprising:30% to 98% by weight of polyisobutylene;1% to 35% by weight of unsaturated dicarboxylic anhydride; and1% to 50% by weight of at least one selected from among alkanolamines, amine-based compounds, and polyhydric alcohols.2. The polybutene derivative of claim 1 , wherein the polyisobutylene has a number average molecular weight of 300 to 10 claim 1 ,000 g/mol.3. The polybutene derivative of claim 1 , wherein the polyisobutylene has a polydispersity of 1 to 6.4. The polybutene derivative of claim 1 , wherein the unsaturated dicarboxylic anhydride comprises at least one selected from among maleic anhydride claim 1 , itaconic anhydride claim 1 , citraconic anhydride claim 1 , propenyl succinic anhydride claim 1 , and 2-pentendioic anhydride.5. The polybutene derivative of claim 1 , wherein the alkanolamine includes an amino group and a hydroxy group claim 1 , the amine-based compound includes two or more amino groups claim 1 , and the polyhydric alcohol includes two or more hydroxy groups.7. The polybutene derivative of claim 5 , wherein the alkanolamine compound is at least one selected from among ethanolamine claim 5 , diethanolamine claim 5 , triethanolamine claim 5 , amino methanol claim 5 , normal-propanolamine claim 5 , isopropanol amine claim 5 , diisopropanolamine claim 5 , triisopropanolamine claim 5 , butanolamine claim 5 , ...

POLYMER COMPOSITION, CROSSLINKED POLYMER, TIRE, AND POLYMER

Provided is a polymer composition for use in the production of a crosslinked polymer having excellent tensile strength and abrasion resistance. A polymer composition comprising a polymer having multiple anionic functional groups and a polymer having multiple nitrogenated functional groups each represented by formula (1). The anionic functional groups are at least one group selected from a carboxy group, a sulfo group and a phosphate group. In one embodiment, each of the nitrogenated functional groups represented by formula (1) is bound to a structure derived from a conjugated diene compound or a structure derived from an aromatic vinyl compound. 2. The polymer composition according to claim 1 , wherein the plurality of anionic functional groups are one or more anionic functional groups selected from the group consisting of a carboxyl group claim 1 , a sulfo group claim 1 , and a phosphoric acid group.3. The polymer composition according to claim 1 , wherein the polymer (A) that comprises the plurality of anionic functional groups is a polymer comprising a structural unit derived from a conjugated diene compound.4. The polymer composition according to claim 1 , wherein the polymer (B) that comprises the plurality of structures represented by the formula (1) is a polymer comprising a structural unit derived from a conjugated diene compound.5. The polymer composition according to claim 4 , wherein the polymer (B) that comprises the plurality of structures represented by the formula (1) has a structure in which the structure represented by the formula (1) is bonded to a vinyl group comprised in the structural unit derived from the conjugated diene compound.6. The polymer composition according to claim 4 , wherein the polymer (B) that comprises the plurality of structures represented by the formula (1) comprises a structural unit derived from an aromatic vinyl compound claim 4 , and has a structure in which the structure represented by the formula (1) is bonded to a ...

RUBBER COMPOSITION FOR TIRE AND PNEUMATIC TIRE

A rubber composition for a tire includes a rubber component, aluminum hydroxide particles having an average particle diameter in a range of 1.5 μm or smaller and a nitrogen adsorption specific surface area of 3˜60 m/g, and wet silica. The aluminum hydroxide particles are in an amount of 1˜60 parts by mass relative to 100 parts by mass of the rubber component, and the rubber composition is obtained by a process including kneading at least the rubber component and the aluminum hydroxide particles at a discharge temperature in a range of 150° C. or higher. 1. A rubber composition for a tire , comprising:a rubber component;{'sup': '2', 'a plurality of aluminum hydroxide particles having an average particle diameter in a range of 1.5 μm or smaller and a nitrogen adsorption specific surface area in a range of 3 to 60 m/g; and'}a wet silica,wherein the aluminum hydroxide particles are in an amount in a range of 1 to 60 parts by mass relative to 100 parts by mass of the rubber component, and the rubber composition is obtained by a process including kneading at least the rubber component and the aluminum hydroxide particles at a discharge temperature in a range of 150° C. or higher.2. A rubber composition for a tire according to claim 1 , wherein the aluminum hydroxide particles have an average particle diameter in a range of 0.69 μm or smaller and a nitrogen adsorption specific surface area in a range of 3 to 50 m/g claim 1 , and the wet silica has a nitrogen adsorption specific surface area in a range of 80 to 300 m/g claim 1 , and is in an amount set in a range of 15 to 130 parts by mass relative to 100 parts by mass of the rubber component.3. A rubber composition for a tire according to claim 1 , wherein the rubber composition satisfies an equation claim 1 , 1.0×(an amount of a process oil in liquid phase at room temperature)+0.6×(an amount of resin having a softening point of lower than 51° C.)+0.4×(an amount of resin having a softening point in a range of 51 to 140° C ...

Keratin in Rubber Applications

A rubber composition includes an elastomer having an elongation at break (Eb) of about 50% or more according to ASTM-D 412 at 25° C., a water-insoluble keratin, and a reinforcing filler. A tire component including the composition and a method for making the composition are also disclosed. 1. A method comprising: mixing together(a) an elastomer having an elongation at break (Eb) of about 50% or more according to ASTM-D 412 at 25° C. and(b) keratin, wherein the keratin is substantially water insoluble.2. The method of claim 1 , wherein the keratin is in the form of feather meal.3. The method of claim 1 , further comprising: processing the mixture comprising the elastomer and the keratin into a tire component.4. The method of claim 1 , further comprising mixing a coupling agent to couple the keratin to the elastomer.5. The method of claim 1 , further comprising chemically binding the keratin to the rubber with a coupling agent.6. The method of claim 1 , further comprising coupling the elastomer and the keratin with a glycidal silane coupling agent.7. The method of claim 1 , further comprising mixing a reinforcing filler comprising carbon black.8. The method of claim 1 , further comprising mixing a processing aid and wherein the keratin is feather meal.9. The method of claim 8 , wherein the feather meal includes the processing aid.10. The method of claim 1 , wherein the keratin is β keratin.11. The method of claim 1 , wherein the amount of keratin is from about 4 to about 50 phr.12. The method of claim 1 , wherein the keratin is in the form of particles or fibers claim 1 , and wherein the keratin has a diameter of from about 1 μm to about 500 μm claim 1 , and a length of from about 0.05 mm to about 10 mm.13. The method of claim 1 , further comprising a coupling agent that is an organosilane polysulfide.14. The method of claim 1 , further comprising 3-glycidoxy-propyl-trimethoxy silane.15. The method of claim 8 , wherein said processing aid includes glycerol.16. The ...

Modified Conjugated Diene-Based Polymer and Rubber Composition Including the Same

A modified conjugated diene-based polymer and a rubber composition including the same are disclosed herein. In some embodiments, a modified conjugated diene-based polymer includes a 1,2-vinyl bond content of 30.0 wt % or less with respect to a total weight of the modified conjugated diene-based polymer, wherein the polymer has a glass transition temperature of −90° C. to −50° C., a mooney viscosity of 50 to 100 measured by ASTM D1646, polydispersity index (PDI) of 1.5 to 3.5, and a mooney relaxation ratio of 0.7 or less when measured at 110° C.

ETHYLENE/alpha-OLEFIN/NON-CONJUGATED POLYENE COPOLYMER, METHOD FOR PRODUCING THE SAME, AND USE THEREOF

An object of the present invention is to provide a novel ethylene/α-olefin/non-conjugated polyene copolymer containing a certain non-conjugated polyene such as VNB as a copolymerization component, having a low long-chain branching content, excellent in cure characteristics in the case of crosslinking by using peroxide, and having good processability. The ethylene/α-olefin/non-conjugated polyene copolymer according to the present invention has constitutional units derived from ethylene (A), an α-olefin (B) having 3 to 20 carbon atoms, and a non-conjugated polyene (C) having a total of two or more partial structures selected from the group consisting of the following general formulas (I) and (II) in a molecule, and satisfies certain requirements. 2. The ethylene/α-olefin/non-conjugated polyene copolymer according to claim 1 , wherein the intrinsic viscosity [η] is 0.1 to 5 dL/g and the weight average molecular weight (Mw) is 10 claim 1 ,000 to 600 claim 1 ,000.3. The ethylene/α-olefin/non-conjugated polyene copolymer according to claim 1 , wherein the non-conjugated polyene (C) is 5-vinyl-2-norbornene (VNB).4. The ethylene/α-olefin/non-conjugated polyene copolymer according to claim 1 , further comprising a constitutional unit derived from a non-conjugated polyene (D) having only one partial structure selected from the group consisting of the general formulas (I) and (II) in a molecule in a weight fraction of 0 to 20 wt % (provided that the sum of the weight fractions of (A) claim 1 , (B) claim 1 , (C) claim 1 , and (D) is 100 wt %) claim 1 , and satisfying the following requirement (viii): {'br': None, 'i': C', 'C', 'D', 'D, '4.5≤Mw×{(Weight fraction of()/100/Molecular weight of())+(Weight fraction of ()/100/Molecular weight of())}≤45\u2003\u2003Expression (4)'}, '(viii) the weight average molecular weight (Mw), the weight fraction of the constitutional unit derived from the non-conjugated polyene (C) (weight fraction of (C) (wt %)), the weight fraction of the ...

PNEUMATIC TIRE

Provided is a pneumatic tire achieving a balanced improvement of steering stability, fuel economy, and processability. The pneumatic tire is formed from a rubber composition which includes: a rubber component; a plasticizer component; and a filler component. The rubber component includes: a diene rubber; and a copolymer containing an aromatic moiety as a structural unit derived from an aromatic vinyl compound and an ethylene moiety as a structural unit derived from ethylene. The ethylene moiety is present in an amount of 15 to 70% by mass based on 100% by mass of the total structural units of the copolymer excluding the aromatic moiety. The copolymer is present in an amount of 5 to 60% by mass based on 100% by mass of the rubber component. The rubber composition satisfies the following relationship: B/A=0.45 to 0.65. 1. A pneumatic tire , formed from a rubber composition ,the rubber composition comprising:a rubber component;a plasticizer component; anda filler component,the rubber component comprising:a diene rubber; anda copolymer containing an aromatic moiety as a structural unit derived from an aromatic vinyl compound and an ethylene moiety as a structural unit derived from ethylene,the ethylene moiety being present in an amount of 15 to 70% by mass based on 100% by mass of total structural units of the copolymer excluding the aromatic moiety,the copolymer being present in an amount of 5 to 60% by mass based on 100% by mass of the rubber component,the rubber composition satisfying the following relationship: B/A=0.45 to 0.65 wherein A represents an amount of the filler component measured by thermogravimetry in accordance with JIS K6226-1:2003, and B represents an amount of the plasticizer component measured by acetone extraction in accordance with JIS K6229:2015.2. The pneumatic tire according to claim 1 ,wherein the copolymer is a hydrogenated copolymer obtained by hydrogenation of a copolymer containing the aromatic moiety and a conjugated diene moiety as a ...

Polar Functionalized Hydrocarbon Resin Via Post-Reactor Modification

This invention relates to a process for the preparation of a polar-functionalized resin composition comprising the steps of (A) contacting a polymer backbone with a reactive moiety to produce a polar-functionalized resin composition wherein the polymer backbone is derived from a feed comprising less than or equal to about 35 wt % components derived from piperylene; less than or equal to about 10 wt % components derived from amylene; less than or equal to about 10 wt % components derived from isoprene; less than or equal to about 55 wt % unreactive paraffins; and C9 homopolymer or copolymer resins, in the presence of a Friedel-Crafts or Lewis acid catalyst; and (B) recovering a polar-functionalized resin composition. 1. A process for the preparation of a polar-functionalized resin composition comprising the steps of: (i) less than or equal to about 35 wt % components derived from piperylene;', '(ii) less than or equal to about 10 wt % components derived from amylene;', '(iii) less than or equal to about 10 wt % components derived from isoprene;', '(iv) less than or equal to about 55 wt % unreactive paraffins; and', '(v) C9 homopolymer or copolymer resins in the presence of a Friedel-Crafts or Lewis acid catalyst; and, '(A) contacting a polymer backbone with a reactive moiety to produce a polar-functionalized resin composition, wherein the polymer backbone is derived from a feed comprising(B) recovering a polar-functionalized resin composition.2. The process of claim 1 , wherein the percent of polar units in the polar-functionalized resin composition is in the amount of about 10 to about 15 mol % based on the composition.3. The process of claim 1 , wherein the reactive moiety is selected from one or more pero-oxy acids claim 1 , hydroboration agents claim 1 , acetylation agents claim 1 , thiols claim 1 , and combinations thereof.4. The process of claim 1 , wherein the Friedel-Crafts catalyst is aluminum chloride.5. The process of claim 1 , wherein the Lewis acid ...

THERMOPLASTIC ELASTOMER FOR CARBON FIBER REINFORCED PLASTIC BONDING LAMINATION

The present invention relates to a thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination, which is contained in a layer to be laminated on a layer composed of a carbon-fiber reinforced plastic, wherein the thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination contains a styrene-based thermoplastic elastomer and a polymer modified by an α,β-unsaturated carboxylic acid, the styrene-based thermoplastic elastomer contains components (a) to (d), and a concentration of an α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid is 0.01 to 10% by mass. 1. A thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination , which is contained in a layer to be laminated on a layer composed of a carbon-fiber reinforced plastic ,wherein the thermoplastic elastomer for carbon fiber reinforced plastic bonding lamination contains a styrene-based thermoplastic elastomer and a polymer modified by an α,β-unsaturated carboxylic acid,the styrene-based thermoplastic elastomer contains the following components (a) to (d), anda concentration of an α,β-unsaturated carboxylic acid derived from the polymer modified by the α,β-unsaturated carboxylic acid is 0.01 to 10% by mass:component (a): a hydrogenated block copolymer which is a hydrogenated product of an (A)-(B) block copolymer and/or an (A)-(B)-(A) block copolymer composed of a vinyl aromatic compound polymer block (A) and a conjugated diene polymer block (B), wherein at least 80% of double bonds of the conjugated diene moiety of the conjugated diene polymer block (B) is saturated through hydrogenation, and a weight average molecular weight thereof is 80,000 to 1,000,000;component (b): a softening agent for hydrocarbon-based rubber;component (c): a hydrogenated block copolymer composed of an (A)-(C)-(A) triblock copolymer which is composed of a vinyl aromatic compound polymer block (A) and a conjugated diene polymer block (C ...

Curable Rubber Compositions Containing Styrene/Alpha-Methyl Styrene Co-Oligomers

A low molecular weight co-oligomer containing styrene and α-methyl styrene in bound form and having a ring and ball softening point not greater than 50° C. is useful in modifying the properties of a diene elastomer-based curable rubber composition capable of being used to manufacture tire treads. 119.-. (canceled)20. A method of decreasing the rolling resistance of a tire having a tread , wherein the tread is obtained by curing a curable rubber composition comprised of at least one diene elastomer , at least one reinforcing filler and a curative system , wherein the method comprises additionally including in the curable rubber composition an effective amount of at least one styrene/α-methyl styrene co-oligomer having a number average molecular weight of from about 300 to about 600 g/mol and a ring and ball softening point of not greater than 50° C.21. The method of claim 20 , wherein the at least one diene elastomer is selected from the group consisting of polybutadienes claim 20 , polyisoprenes claim 20 , copolymers of butadiene and vinyl aromatic monomers claim 20 , copolymers of isoprene and vinyl aromatic monomers claim 20 , and combinations thereof.22. The method of claim 20 , wherein the at least one reinforcing filler includes at least one of silica and carbon black.23. The method of claim 20 , additionally comprising at least one silane.24. The method of claim 20 , wherein the ring and ball softening point of the at least one styrene/α-methyl styrene co-oligomer is at least 25° C.25. The method of claim 20 , wherein the curative system is comprised of at least one of elemental sulfur claim 20 , organosulfur compounds and combinations thereof.26. The method of claim 25 , wherein the curative system is additionally comprised of an accelerator claim 25 , curing aid or activator or a combination thereof.27. The method of claim 20 , wherein the curable rubber composition is comprised of from 5 to 50 parts by weight of the at least one styrene/α-methyl styrene co- ...