ЭЛАСТОМЕРНАЯ ПОЛИМЕРНАЯ КОМПОЗИЦИЯ ДЛЯ ПОЛУЧЕНИЯ ФОРМОВАННЫХ ИЗДЕЛИЙ, ИЗОЛИРУЮЩЕГО СЛОЯ КОНДЕНСАТОРА, МЕДИЦИНСКОГО УСТРОЙСТВА И УПЛОТНЕНИЯ ДЛЯ ТОПЛИВНОГО ЭЛЕМЕНТА, ИЗГОТОВЛЕННЫХ ИЗ УКАЗАННОЙ КОМПОЗИЦИИ

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Настоящее изобретение относится к составу резины на основе ЭПДМ (этилен-пропилен-диен-мономера), содержащего высокодисперсный ускоренный кварц (осажденный диоксид кремния), и к окрашенному экструдированному полимерному профилю, содержащему упомянутый состав, который предназначен, в частности, для использования в стройиндустрии и автомобильной промышленности. Настоящее изобретение также относится к способу получения вышеуказанного состава. Технический результат при использовании заявленных изобретений позволяет производить полимерный профиль с низкой стоимостью и подходящими механическими свойствами. 5 н. и 9 з.п. ф-лы, 3 табл.

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Изобретение относится к способу получения сшитого изделия. Способ включает стадию полимеризации этилена, необязательно, с одним или более альфа-олефиновым(и) сомономером(ами) в присутствии катализатора Циглера-Натта, формование из указанного полимера изделия и его последующее сшивание. При этом полученный на стадии полимеризации полимер этилена содержит двойные связи углерод-углерод/1000 атомов углерода в диапазоне от более чем 0,2 до менее 5,0 двойных связей, характеризуется молекулярно-массовым распределением (MWD) в диапазоне от 3,3 до 15 и не содержит длинноцепочечных разветвлений. Указанный полимер выбирают из каучуков (РОЕ), термопластов (POP) или сополимеров этилена очень низкой плотности (VLDPE), которые имеют диапазон плотности от 855 до 909 кг/м, или линейных сополимеров этилена низкой плотности (LLDPE) с плотностью от 910 до 930 кг/м, или сополимеров этилена средней плотности (MDPE) с плотностью от 931 до 945 кг/м. Полученные сшитые изделия имеют хорошие механические свойства ...

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Группа изобретений относится к способу гемостаза и заживлению ран. Раскрыт способ получения сухой композиции для изготовления гемостатической пасты, включающий этапы смешивания желатина в порошкообразной форме, водной среды и щелочного/кислотного соединения с получением пасты и сублимационной сушки пасты, причем щелочное/кислотное соединение способно реагировать с кислотным/щелочным соединением в водной среде с высвобождением газа CO. Также раскрыты способ восстановления сухой композиции с получением гемостатической пасты, паста для гемостатического применения, сухая композиция для получения гемостатической пасты, контейнер для хранения сухой композиции и гемостатический набор. Группа изобретений обеспечивает сухую композицию, которая восстанавливается без механического смешивания с образованием текучей пасты, имеющей мягкую и маловязкую консистенцию. 9 н. и 54 з.п. ф-лы, 34 ил., 19 табл., 8 пр.

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ОКИСЛИТЕЛЬНО ОТВЕРЖДАЕМАЯ КОМПОЗИЦИЯ ПОКРЫТИЯ

Изобретение относится к окислительно отверждаемым составам для нанесения покрытия. Предложен состав для нанесения покрытия, включающий окислительно отверждаемую смолу на алкидной основе и хелант, способный хелатировать по меньшей мере один ион переходного металла тремя или четырьмя атомами азота, причем указанный состав содержит комплекс, включающий хелант и ион переходного металла Mn, и этот комплекс является неопределенным, т.е. полученным без выделения из среды, в которой его получили. Предложен также способ получения указанного состава для нанесения покрытия и покрытие, полученное в результате отверждения состава. Технический результат – предложенный состав улучшает проблему образования поверхностной пленки при хранении составов, включающих сиккативы на основе металлов, и одновременно требует меньшей доработки изготовителями окислительно отверждаемых композиций покрытий, пригодных для нанесения, чем существующие окислительно отверждаемые составы на алкидной основе, которые по существу ...

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Изобретение относится к химии биополимеров. Предложенный способ для по меньшей мере частичного деацетилирования гликозаминогликана, содержащего ацетильные группы, включает обеспечение гликозаминогликана, содержащего ацетильные группы и имеющего средневесовую молекулярную массу в диапазоне от 1 до 5 МДа. Затем проводят реакцию гликозаминогликана, содержащего ацетильные группы, с гидроксиламином (NH2OH) или его солью при температуре 10-90°C в течение 2-200 ч с образованием по меньшей мере частично деацетилированного гликозаминогликана. После чего выделяют по меньшей мере частично деацетилированный гликозаминогликан. Полученный указанным способом гликозаминогликан характеризуется степенью ацетилирования 99% или менее и средневесовой молекулярной массой 0,5 МДа или более. Также предложены применение гидроксиламина или его соли для по меньшей мере частичного деацетилирования гликозаминогликана и способ получения гидрогелевого продукта. Изобретение направлено на деацетилирование биополимеров, ...

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Изобретение относится к способу получения продукта в виде наночастиц из биополимера. В данном способе биополимерное исходное сырье и пластификатор подают в зону подачи экструдера, имеющего шнековую конфигурацию, такую что биополимерное исходное сырье, в частности крахмал, в экструдере подвергается переработке при использовании сдвиговых усилий, и сшивающий агент добавляют в экструдер на технологической схеме ниже по потоку зоны подачи. Способ характеризуется производительностью, большей или равной 1,0 метрической тонны продукта в час. Биополимерное исходное сырье и пластификатор в зону подачи предпочтительно добавляют раздельно. Экструдер в зоне подачи может иметь одновитковые элементы. Температуры в промежуточной секции экструдера составляет более 100°С. Конфигурация шнека может включать две и более секции уплотнения для водяного пара. Сдвиговые усилия в первой секции экструдера могут быть большими, чем сдвиговые усилия в соседней второй секции экструдера, расположенной на технологической ...

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Изобретение относится к способу вулканизации полимерных композиций и может быть использовано для изготовления варочных камер, диафрагм и уплотнительных герметичных соединений в вулканизационном оборудовании для шин и РТИ: автоклавах, форматорах-вулканизаторах, вертикальных этажных прессах, эксплуатирующихся продолжительное время во влажной паровоздушной среде с высокой температурой и большим давлением. Способ включает в себя вулканизацию изделия в начале при температуре пара 165-170°С в течение 50-45 мин, а затем при температуре 195-205°С в течение 10-5 мин. Техническим результатом изобретения является повышение прочности, твердости, сопротивления раздиру изделия. 4 табл., 2 пр.

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 ...

УЛУЧШЕННЫЙ СПОСОБ ПОЛУЧЕНИЯ ПОЛИЭТИЛЕНА, СШИТОГО СИЛАНОМ

... 1. Способ получения полиэтилена, сшитого (вулканизованного) силаном, в котором на полиэтилен прививают силан, содержащий, по меньшей мере, одну этиленовую двойную связь, с получением полиэтилена, сшивающегося силаном, который затем подвергают стадии сшивания (вулканизации), отличающийся тем, что способ содержит следующие стадии: а) из полиэтилена, сшивающегося силаном, перед стадией вулканизации отбирается образец; b) образец перерабатывается в пленку; с) пленка анализируется инфракрасной спектроскопией; d) определяется предопределенная площадь ИК-спектра; и е) площадь, определенная на стадии d), коррелируется с содержанием геля в полиэтилене, сшитом силаном, после стадии вулканизации с использованием предопределенной кривой регрессии. 2. Способ по п.1, в котором полиэтиленом является полиэтиленовый гомополимер или сополимер этилена и, по меньшей мере, одного другого олефина. 3. Способ по п.2, в котором другой олефин выбран из пропилена, бутена, октена, винилацетата, метакрилата и их смесей ...

НЕПРЕРЫВНЫЙ СПОСОБ ПОЛУЧЕНИЯ ВОДОАБСОРБИРУЮЩИХ ПОЛИМЕРОВ

... 1. Способ получения частиц абсорбирующего воду полимера, включающий в себя стадии(i) получения водного раствора мономера, содержащего по меньшей мере частично нейтрализованные моноэтиленненасыщенные мономеры, несущие группы (α1) карбоновой кислоты, и по меньшей мере один сшивающий агент (α3);(ii) необязательного добавления мелких частиц водоабсорбирующего полимера или водных растворов солей к водному раствору мономера;(iii) добавления к водному раствору мономеров инициатора полимеризации или по меньшей мере одного компонента системы инициаторов полимеризации, которая содержит два или более компонента;(iv) понижения содержания кислорода водного раствора мономеров;(v) загрузки водного раствора мономеров в реактор-полимеризатор;(vi) полимеризации мономеров в водном растворе мономеров в реакторе-полимеризаторе;(vii) выгрузки стренги полимерного геля из реактора-полимеризатора и необязательного измельчения полимерного геля с получением таким образом частиц полимерного геля;(viii) высушивания ...

ОТВЕРЖДАЕМЫЕ ПЛЕНКООБРАЗУЮЩИЕ КОМПОЗИЦИИ, СОДЕРЖАЩИЕ РЕАКТИВНЫЕ ФУНКЦИОНАЛЬНЫЕ ПОЛИМЕРЫ И ПОЛИСИЛОКСАНОВЫЕ СМОЛЫ, МНОГОСЛОЙНЫЕ КОМПОЗИЦИОННЫЕ ПОКРЫТИЯ И СПОСОБЫ ИХ ИСПОЛЬЗОВАНИЯ

БИОРАЗЛАГАЕМЫЕ ЧАСТИЦЫ, МАТЕРИАЛ ДЛЯ ОККЛЮЗИИ СОСУДОВ И СПОСОБ ПОЛУЧЕНИЯ БИОРАЗЛАГАЕМЫХ ЧАСТИЦ

... 1. Биоразлагаемые частицы, содержащие синтетический полимер, химически сшитый с полиосновной карбоновой кислотой, причем указанные биоразлагаемые частицы имеют содержание воды от 20 до 90% в водонасыщенном состоянии.2. Биоразлагаемые частицы по п. 1, степень сжатия которых составляет 15-60% и коэффициент восстановления в водонасыщенном состоянии не ниже 15%.3. Биоразлагаемые частицы по п. 1 или 2, причем указанный синтетический полимер является: гомополимером или блок-сополимером водорастворимого полимера(ов), выбранного(ых) из группы, состоящей из полиэтиленгликоля, полипропиленгликоля, поливинилового спирта, полиакриловой кислоты, полигидроксиэтилакрилата, полигидроксиэтилметакрилата, поливинилпирролидона, карбоксиметилцеллюлозы, гидроксиметилцеллюлозы и гидроксиэтилцеллюлозы; или блок-сополимером указанного водорастворимого полимера или полимеров и мономера(ов), выбранного(ых) из группы, состоящей из α-гидроксикислот, циклических димеров α-гидроксикислот, гидроксидикарбоновых кислот ...

Способ получения термопластичного эластомера на основе натурального каучука и поливинилхлорида

Изобретение относится к полимерной промышленности и может быть использовано для изготовления изделий с повышенным уровнем бензомаслостойкости - уплотнителей, ремней, конвейерных лент, шлангов, и деталей с повышенной озоно- и атмосферостойкостью. Осуществляют коагуляцию смеси латекса натурального каучука и нестабилизированного латекса поливинилхлорида под действием 1% водного раствора полидиаллилдиметиламмоний хлорида. Вводят в полученную основу вулканизующую систему при температуре 50°С с последующей вулканизацией образованной композиции. Обеспечивается повышение стойкости термопластичного эластомера к воздействию органических жидкостей и агрессивных сред при сохранении его деформационно-прочностных свойств. 1 табл., 1 пр., 5 ил.

НОВОЕ СШИВАЮЩЕЕ СРЕДСТВО ДЛЯ ГЕТЕРО-РЕАКЦИИ ДИЛЬСА-АЛЬДЕРА И ЕГО ПРИМЕНЕНИЕ В ПОЛИМЕРНЫХ СИСТЕМАХ, ОБЛАДАЮЩИХ СПОСОБНОСТЬЮ ОБРАТИМОГО СШИВАНИЯ

УГЛЕВОДНЫЙ СШИВАЮЩИЙ АГЕНТ

СПОСОБЫ, СИСТЕМЫ И УСТРОЙСТВО ДЛЯ ОТВЕРЖДЕНИЯ КОМПОЗИЦИОННОГО БЛОКА ЭПОКСИСОДЕРЖАЩЕГО ПРЕПРЕГА

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

СШИВАЕМАЯ КОМПОЗИЦИЯ, СПОСОБНАЯ К СШИВАНИЮ ПО РЕАКЦИИ ПРИСОЕДИНЕНИЯ МИХАЭЛЯ (RMA)

... 1. Сшиваемая композиция, содержащая:a. компонент А с по меньшей мере 2 кислотными протонами С-Н в активированных метиленовых или метановых группах (RMA-донорная группа), иb. компонент В с по меньшей мере 2 активированными ненасыщенными группами (RMA-акцепторная группа), иc. каталитическую систему С, содержащую или способную вырабатывать основный катализатор, способный активировать реакцию RMA между компонентами А и В,характеризующаяся тем, что данная сшиваемая композиция дополнительно содержит содержащий Х-Н группу компонент D, который также выступает донором в реакции присоединения Михаэля, способным вступать в реакцию с компонентом В под воздействием катализатора С, где X представляет собой N, Р, О, S, или где X представляет собой С как часть кислотной метильной группы (СН).2. Сшиваемая композиция по п. 1, отличающаяся тем, что RMA-акцепторные группы в компоненте В представляют собой акрилоиловые группы.3. Сшиваемая композиция по п. 1, отличающаяся тем, что RMA-донорные группы в компоненте ...

СОПОЛИМЕРНЫЙ КАУЧУК, СОДЕРЖАЩИЙ НИТРИЛЬНЫЕ ГРУППЫ, КОМПОЗИЦИЯ СШИВАЕМОГО КАУЧУКА И СШИТЫЙ КАУЧУК

ПРОИЗВОДНЫЕ СУЛЬФАТИРОВАННЫХ ПОЛИСАХАРИДОВ, ИХ СПОСОБ ПОЛУЧЕНИЯ, МОДИФИКАЦИЯ И ПРИМЕНЕНИЕ

СПОСОБ ПОЛУЧЕНИЯ СШИТОГО ГЕЛЯ

... 1. Способ получения сшитого геля из по меньшей мере одного полимера или одной из его солей, включающий по меньшей мере стадии, заключающиеся в:a) получении водной среды, содержащей указанный полимер,b) образовании гомогенного геля из среды, полученной на стадии (а),c) приведении геля, полученного на стадии (b), в контакт с эффективным количеством по меньшей мере одного сшивающего агента;d) сшивании указанной смеси, образованной на стадии (с); иe) извлечении указанного сшитого гидрогеля, при этом по меньшей мере указанные стадии от (а) до (d) осуществляют в герметичной полости, ограниченной по меньшей мере частично деформируемой стенкой, причем указанную смесь, присутствующую в полости, подвергают на стадии (d) условиям, способствующим сшиванию.2. Способ по п.1, дополнительно включающий стадию (f) прекращения сшивания, где указанную стадию (f) осуществляют до, совместно с или после стадии извлечения (е).3. Способ по п.2, в котором стадию сшивания (f) осуществляют до стадии извлечения (е) ...

НОВЫЕ ПОЛИМЕРНЫЕ ФОТОИНИЦИАТОРЫ

... 1. Полимерный фотоинициатор, являющийся сополимером по меньшей мере одного мономера (A) с по меньшей мере одним мономером (B), где:- мономер (A) является мономером-фотоинициатором (A) формулы (I):в которой:Pi представляет собой фотоинициирующий фрагмент;Z представляет собой линкерный фрагмент;Xи Xнезависимо выбраны из необязательно замещенного C-Cалкилена, необязательно замещенного C-Cалкенилена, необязательно замещенного гетероциклила, -O-, -S-, -NR-, -C(=O)-, C(=NR)-, -Si(R)-O-, необязательно замещенного арила и их комбинаций, где Rпредставляет собой H или необязательно замещенный C-Cалкил;где Xи Xили их часть могут быть связаны друг с другом или с Z с образованием одной или нескольких кольцевых структур;где Z, Xи Xвыбраны так, что N является третичным амином;Wи Wявляются функциональными группами, независимо выбранными из спиртовых групп, первичных аминогрупп, вторичных аминогрупп, тиоловых групп, алкоксисилановых групп, групп сложных силановых эфиров карбоновых кислот, изоцианатных групп ...

ПОЛИМЕРНЫЕ ГИДРОГЕЛИ И СПОСОБЫ ИХ ПРИГОТОВЛЕНИЯ

... 1. Полимерный гидрогель, включающий карбоксиметилцеллюлозу и лимонную кислоту, причем указанная лимонная кислота участвует в образовании поперечных связей в карбоксиметилцеллюлозе, при этом указанный полимерный гидрогель имеет коэффициент набухания по меньшей мере 50.2. Полимерный гидрогель по п.1, дополнительно включающий неионный полимер.3. Полимерный гидрогель по п.2, в котором неионный полимер представляет собой гидроксиэтилцеллюлозу.4. Полимерный гидрогель по п.3, в котором массовое отношение карбоксиметилцеллюлозы к гидроксиэтилцеллюлозе превышает 1:1.5. Полимерный гидрогель по п.4, в котором массовое отношение карбоксиметилцеллюлозы к гидроксиэтилцеллюлозе составляет от 2:1 до 5:1.6. Полимерный гидрогель по п.1, который состоит из возможно гидратированной карбоксиметилцеллюлозы, сшитой лимонной кислотой.7. Полимерный гидрогель по п.1, имеющий коэффициент набухания по меньшей мере 70, 80, 90 или 100.8. Полимерный гидрогель по п.1, имеющий коэффициент набухания от 50 до 350.9. Полимерный ...

СПОСОБ ПРИМЕНЕНИЯ S-(3-АМИНОПРОПИЛ)ТИОСЕРНОЙ КИСЛОТЫ И/ИЛИ ЕЕ МЕТАЛЛИЧЕСКОЙ СОЛИ

... 1. Способ применения S-(3-аминопропил)тиосерной кислоты и/или ее металлической соли, добавляемой к каучуковому компоненту в качестве исходного материала для вулканизованной резиновой смеси, включающий:стадию предварительного смешения А для смешивания каучукового компонента, наполнителя и S-(3-аминопропил)тиосерной кислоты и/или ее металлической соли,стадию последующего смешения В для смешивания смешанного вещества А, полученного на стадии предварительного смешения А, серного компонента и ускорителя вулканизации, имеющего массу выше массы вышеуказанного серного компонента, истадию термообработки С для термообработки смешанного вещества В, полученного на стадии последующего смешения В, для получения вулканизованной резиновой смеси, где придается прочность вулканизованной резиновой смеси.2. Способ применения по п. 1, где масса S-(3-аминопропил)тиосерной кислоты и/или ее металлической соли, в расчете на 1 масс.ч. серного компонента, составляет 0,05 масс. ч. или более и 2,5 масс.ч. или менее ...

ЭЛАСТОМЕРНЫЕ КОМПОЗИЦИИ И ИХ ПРИМЕНЕНИЕ В ИЗДЕЛИЯХ

МИКРОСТРУКТУРА, ВКЛЮЧАЮЩАЯ ПОПЕРЕЧНО-СШИТЫЙ ГИДРОГЕЛЬ ГИАЛУРОНОВОЙ КИСЛОТЫ, И СПОСОБ ЕЕ ПОЛУЧЕНИЯ

АЛЬГИНАТНОЕ ПОКРЫТИЕ ДЛЯ ОБРАБОТКИ СЕМЯН

СОПОЛИМЕРНЫЙ КАУЧУК, СОДЕРЖАЩИЙ НИТРИЛЬНЫЕ ГРУППЫ

ФУНКЦИОНАЛИЗИРОВАННЫЕ ПОЛИМЕРНЫЕ КОМПОЗИЦИИ

КОМПОЗИЦИИ СИЛИЛИРОВАННЫХ ТЕРМОПЛАСТИЧНЫХ ВУЛКАНИЗАТОВ

... 1. Способ изготовления термопластичного вулканизата, включающий: ! смешение первого термопластичного полимера, второго эластомерного полимера, ангидрида карбоновой кислоты, источника свободных радикалов и усилителя клейкости с образованием клейкой первой смеси, содержащей первый термопластичный полимер и привитый второй эластомерный полимер с диспергированным в нем усилителем клейкости; затем ! реакцию первой смеси с силаном с образованием неклейкого термопластичного вулканизата. ! 2. Способ по п.1, в котором первый термопластичный полимер включает один или более полимеров, выбранных из группы, состоящей из гомополимеров и сополимеров полипропилена, полиэтилена, полистирола, акрилонитрил-бутадиен-стирола, стирол-акрилонитрила, полиметилметакрилата, термопластичных полиэфиров, поликарбоната, полиамида, полифениленового эфира, полифениленоксида и их комбинаций. ! 3. Способ по п.1, в котором второй эластомерный полимер включает один или более полимеров, выбранных из группы, состоящей из сополимера ...

БЛАГОПРИЯТНЫЕ ДЛЯ КОЖИ АДГЕЗИВЫ ИЗ ФОТОИНИЦИАТОРОВ НА ОСНОВЕ ПОЛИАЛКИЛОВЫХ ЭФИРОВ

... 1. Способ получения благоприятной для кожи, чувствительной к давлению адгезивной композиции, включающий стадииа. предоставления матричной композиции, включающей полимерный фотоинициатор общей формулы (I):где Rи Rнезависимо являются в каждом случае идентичными или различными, линейными или разветвленными алкиленовыми или циклоалкиленовыми группами; где Rи Rмогут быть замещены одним или несколькими заместителями, выбранными из CN; азидов; сложных эфиров; эфиров; амидов; атомов галогена; сульфонов; сульфоновых производных; NHили Nalk, где alk представляет собой любую C-Cалкильную группу с прямой цепью, C-Cразветвленную или циклическую алкильную группу;Rи Rнезависимо являются в каждом случае идентичными или различными линейными или разветвленными алкильными или циклоалкильными группами или арильными группами или независимо являются в каждом случае выбранными из Н, OH, CN, галогенов, аминов, амидов, спиртов, эфиров, тиоэфиров, сульфонов и их производных, сульфоновой кислоты и ее производных, ...

ГИДРОФИЛЬНЫЕ ГЕЛИ ИЗ ФОТОИНИЦИАТОРОВ НА ОСНОВЕ ПОЛИУРЕТАНА

... 1. Способ получения геля, включающий стадииа. предоставления матричной композиции, включающей полимерный фотоинициатор общей формулы I:где каждый из R, Rи Rможно независимо выбрать из С1-С25 линейного алкила, C3-C25 разветвленного алкила, C3-C25 циклоалкила, арильных и гетероарильных групп, таких как любой ароматический углеводород, имеющий до 20 атомов углерода;каждый из Rи Rнезависимо выбирают из С1-С25 линейного алкила, С3-С25 разветвленного алкила, С3-С25 циклоалкила, арила, гетероарила, водорода, -OH, -CN, галогенов, аминов, амидов, спиртов, эфиров, тиоэфиров, сульфонов и их производных, сульфоновой кислоты и ее производных, сульфоксидов и их производных, карбонатов, изоцианатов, нитратов, акрилатов, гидразина, азинов, гидразидов, полиэтиленов, полипропиленов, сложных полиэфиров, полиамидов, полиакрилатов, полистиролов и полиуретанов; и если Rи Rявляются алкильными и арильными группами, они могут быть замещены одним или несколькими заместителями, выбранными из CN; OH; азидов; сложных ...

СПОСОБ МОДИФИЦИРОВАНИЯ ПОЛИМЕРОВ

ПОЛИМЕР С УЛУЧШЕННЫМИ ХАРАКТЕРИСТИКАМИ И СПОСОБ ЕГО ПОЛУЧЕНИЯ

... 1. Способ обработки полимерного материала, включающий:временное увеличение подвижности в полимере с обеспечением конкретной ориентации цепей полимера.2. Способ по п. 1, отличающийся тем, что указанный полимер включает термореактивный материал.3. Способ по п. 1, отличающийся тем, что увеличенную подвижность обеспечивают посредством введения пластификатора.4. Способ по п. 3, отличающийся тем, что указанный пластификатор содержит HO.5. Способ по п. 3, отличающийся тем, что указанный пластификатор содержит CO.6. Способ по п. 3, отличающийся тем, что указанный пластификатор удаляют до завершения цикла отверждения.7. Способ по п. 1, отличающийся тем, что увеличенную подвижность обеспечивают посредством импульсного электрического поля.8. Способ по п. 1, отличающийся тем, что увеличенную подвижность обеспечивают посредством ультразвукового облучения.9. Способ обработки полимерного материала, включающий:инициирование цикла отверждения полимера;увеличение подвижности в полимере во время указанного ...

VERNETZTE HYDROGELE UND VERFAHREN ZU DEREN HERSTELLUNG

Verfahren zur Herstellung absorbierender Polymere

Verfahren zur Herstellung absorbierender Polymere

Verfahren zur Herstellung einer Kautschukmischung

Die Erfindung betrifft ein Verfahren zur Herstellung einer Kautschukmischung, welche wenigstens einen Dienkautschuk enthält und welches durch folgende Verfahrensschritte gekennzeichnet ist: Homogenes Vermischen wenigstens eines Polymers mit einer Glasübergangstemperatur Tg von größer +50°C (hoch-Tg-Polymer) mit wenigstens einem Öl in einer ersten Mischstufe; Hinzufügen des homogenen Gemischs aus hoch-Tg-Polymer und Öl zu einem oder mehreren Dienkautschuken und einem oder mehreren Füllstoffen und einem oder mehreren Alterungsschutzmitteln und einem oder mehreren Ozonschutzwachsen und einem oder mehreren Weichmachern und einem oder mehreren anorganischen Aktivatoren und einem oder mehreren Vulkanisationsbeschleunigern und einem Vulkanisationssystem und weiteren Prozesshilfsmitteln in wenigstens einer weiteren Mischstufe in einem Mischer; anschließende Vulkanisation der Kautschukfertigmischung. Die erfindungsgemäß hergestellte Kautschukmischung kann zur Herstellung von Reifen und weiteren ...

Alkoxyvernetzende RTVl-Siliconkautschuk-Mischungen

VERFAHREN ZUR HERSTELLUNG VON ELASTOMEREN FORMKOERPERN AUF DIEN-BASIS

Montageklebstoff.

PARTIKEL FÜR ARZNEISTOFFABGABE

Verfahren zum Devulkanisieren von vulkanisierten Fluorelastomeren, Fluorelastomere davon und ihre Verwendung

Verfahren zum Devulkanisieren von vulkanisierten Fluorelastomeren, mit einem Fluorgehalt zwischen 62 Gew.-% und 74 Gew.-% und vulkanisiert mit ionischen Systemen, wobei diese ionischen Systeme vorzugsweise aus Bisphenol A und Bisphenol AF, d. h. 2,2-Bis(4-hydroxyphenyl)hexafluorpropan, ausgewählt sind, wobei das Verfahren einen Schritt des Erhitzens dieser vulkanisierten Fluorelastomere in Gegenwart einer Hydrolysezusammensetzung umfasst, wobei die Hydrolysezusammensetzung aus einer oder mehreren Chemikalien, ausgewählt aus Wasser, wasserlöslichen Alkoholen, wasserlöslichen Glykolen und Gemischen davon, besteht, bei einer Temperatur von 350°C bis 430°C. Fluorelastomere, die durch das Verfahren erhalten werden, und deren Verwendung zur Herstellung von Verbindungen und vulkanisierten Zusammensetzungen sind ebenfalls beschrieben.

VERNETZUNG VON HARZEN

WÄSSRIGES GEL UND HERSTELLUNGSVERFAHREN UND VERWENDUNG DES WÄSSRIGEN GELS

Verfahren zum Herstellen geformter Gegenstände aus vernetzten Polyolefinen.

Verfahren zum Herstellen von Formkoerpern aus Vinylchlorid- und bzw. oder Vinylidenchloridpolymerisaten

Vernetztes Kohlehydratpolymer, insbesondere auf Basis von Polysacchariden und/oder Oligosacchariden und/oder Polyolen

Kosmetische Zusammensetzung, bestehend aus einer wäßrigen Lösung eines vernetzten Polymers und weiteren in der Kosmetik üblichen Zusatzstoffen, wobei das vernetzte Polymer wenigstens einem Typ eines Kohlehydrats oder Kohlehydratderivats entspricht, umfassend wenigstens eine primäre Alkoholfunktion, wobei das vernetzte Polymer erhältlich ist durch eine Vernetzungsreaktion in homogener wässriger Phase zwischen der primären Alkoholfunktion des Kohlehydrats, das in wäßriger alkalischer Phase gelöst ist, und einer reaktiven Funktion eines Vernetzungsmittels, wobei das Vernetzungsmittel einen nicht reaktiven Teil umfaßt, der für die Haut nach Neutralisation der Vernetzungsreaktion verträglich ist.

KAUTSCHUKZUSAMMENSETZUNG AUF BASIS VON CHLOROPREN

Formprodukt aus vulkanisiertem Kautschuk, Verfahren zu seiner Herstellung und Verwendung des Formprodukts

Die vorliegende Erfindung stellt ein Formprodukt aus vulkanisiertem geschäumtem Kautschuk, welches eine Oberflächenglätte besitzt, die derjenigen eines ungeschäumten Formprodukts aus vulkanisiertem Kautschuk gleicht oder höher ist, ausgezeichnete mechanische Festigkeitseigenschaften, Widerstandsfähigkeit gegen bleibende Druckverformung und Abriebfestigkeit besitzt, und ein ungeschäumtes Formprodukt aus vulkanisiertem Kautschuk, welches hinsichtlich seiner Oberflächenglätte einem herkömmlichen ungeschäumten Formprodukt aus vulkanisiertem Kautschuk überlegen ist und ausgezeichnete Widerstandsfähigkeit gegen bleibende Druckverformung, mechanische Festigkeitseigenschaften und Abriebsfestigkeit besitzt, sowie ein Verfahren zu deren Herstellung zur Verfügung. Das erfindungsgemäße Formprodukt ist dadurch gekennzeichnet, dass die Zahl von Schwefelatomen, die an seiner Oberfläche vorliegen, mindestens 1,2 mal so hoch ist wie die Zahl von Schwefelatomen, die in einer Schnittfläche vorliegen, die ...

DURCH STRAHLUNG POLYMERISIERBARES GEMISCH UND DARAUS HERGESTELLTES KOPIERMATERIAL

Polybutadien-gepfropfter Isoprenkautschuk, Herstellungsverfahren hierfür und Vulkanisat und gemischte Verbindung davon

Polybutadien-gepfropfter Isoprenkautschuk, wobei, berechnet auf der Basis des Gesamtgewichtes des Polybutadien-gepfropften Isoprenkautschuks, der Gehalt der strukturellen Butadieneinheiten 0,5-8 Gew.-% und der Gehalt der strukturellen Isopreneinheiten 92-99,5 Gew.-% ist; das Molekulargewicht im Zahlenmittel des Polybutadien-gepfropften Isoprenkautschuks 2 × 10-5 × 10, die Polydispersität 3-4, der Verzweigungsfaktor 0,5-0,98 und der Gehalt des Polybutadien-gepfropften Isoprenkautschuks mit cis-1,4-Struktur 95-99 Gew.-% ist.

Verfahren zur Herstellung oxidativ vernetzter Polyarylensulfide

EPOXY RESIN-CURABLE COMPOSITIONS

Verfahren zur Herstellung frei tragender duennwandiger Gebilde, wie Faeden, Baender,Filme, Scheiben, aus Naturkautschuk

Verfahren zur Herstellung von Siliconformkörpern aus durch Licht vernetzbaren Siliconmischungen

Gegenstand der Erfindung ist ein Verfahren zur Herstellung von Siliconformkörpern, bei dem 1) eine durch Licht vernetzbare Siliconmischung geformt wird, 2) danach die geformte Siliconmischung mit Licht von 200 bis 500 nm bestrahlt wird, um diese so vorzuvernetzen, dass diese ihre Form bei einer Temperatur T beibehält und 3) danach die geformte und bestrahlte Siliconmischung bei der Temperatur T thermisch zu Formkörpern ausgehärtet wird.

Process for the production of polymeric materials

Cross-linked polymeric material is produced by subjecting a high polymer or mixture of high polymers to shearing forces, which are sufficient to rupture the polymer(s) with the formation of polymeric ions or free radicals, in the presence of a cross-linking agent having a functionality of at least 3, and at a temperature below the decomposition temperature of the polymer(s). Cross-linking agents specified are: (A) compounds of the general formula MXn where M is an atom of valency 3 or more, X is an organic or inorganic radical and n is an integer equal to or greater than 3, e.g. the halides, isopropoxides and sec.-butoxides of aluminium, iron, tin, boron, chromium, manganese, silicon, titanium or tungsten; (B) substituted aromatic compounds and organic resinous materials, including intermediates from which resinous materials can be prepared, which contain per molecule at least 3 of the groups: hydroxy, carboxyl, methylol, hydrogen sulphate, primary and secondary amine, methylolamine sulphonamide ...

Anerobically curable compositions

Powder coating compositions and process for the manufacture thereof

Improvements relating to resin curing systems

To control when a phenolic resin system will cure, the acid catalyst is chemically blocked so that at ambient conditions, although the catalyst is mixed in the resin matrix, it will not cure. Cure can be initiated by the application of heat which "unblocks" the catalyst to enable it to commence the cure. The invention has particular application to the placement of tubular liners impregnated with the resin in pipes or passageways where the liner is inflated into the pipe or passageway before curing of the resin and then curing can be effected at the installers convenience, which is of considerable advantage.

Cross-linked polymer of carbohydrate, notably based on polysaccharides, and/or on oligosaccharides and/or on polyols

The invention relates to a cross-linked polymer of at least one type of carbohydrate or carbohydrate derivative comprising at least one primary alcohol function. This cross-linked polymer is particularly useful for the manufacture of a composition which is intended to be applied onto a tissue of a subject to obtain a tensing and/or toning effect on this tissue.

Crosslinking of diene-type polymers

Compositions capable of being cured and imparting durability, in the absence or without the use of conventional sulfur-based cure systems, include a carboxylated base polymer and an aluminum compound, wherein the aluminum compound comprises a retarding anion (especially aluminium lactate). The compositions can be used to form elastomeric articles of manufacture such as gloves, condoms, and finger cots, and as binders and coatings. Retarding anions are those which require time to dissociate from the aluminum ion, thereby delaying the crosslinking of the carboxylated polymer. The aluminum compounds can be used to manufacture gloves from aqueous dispersions of the carboxylated polymers, including, for example, carboxylated nitrile latexes, in a coagulant dip process.

Composition comprising at least one viscoelastic polymer

A composition comprising at least one viscoelastic polymer, wherein the at least one viscoelastic polymer backbone is covalently cross-linked by means of at least one radical scavenger. Also disclosed is a method for producing a composition comprising at least one viscoelastic polymer crosslinked in the manner defined above. The compositions have use as synthetic synovial fluid and in the treatment of arthritis. Typical examples of viscoelastic polymer include hyaluronic acid. Examples of radical savengers include hydroxylflavones.

Process for producing highly water absorptive polymer

A highly water absorbent polymer having high resistance to salt solution is prepared by crosslinking a hyrophilic polymer or copolymer having carboxyl and/or carboxylate groups and water content of 10 to 40 wt. % with a crosslinking agent having at least two functional groups capable of reaction with said carboxyl and carboxylate group. An improved hydrophilic polymer is produced by polymerizing a monomer with a persulfate and a hydroperoxide as combined initiators. Another improved hydrophilic polymer is prepared by polymerizing a monomer with a persulfate and adding a hydroperoxide to the resulting polymer.

Method and composition for the in isitu formation of a water barrier

Improvements in or relating to the vulcanization of rubber

... 330,981. Rubber Service Laboratories Co., (Assignees of Moore, W. A.). Nov. 12, 1928, [Convention date]. Vulcanizing.-A rubber sulphur mix is vulcanized by heating it in water in which an insoluble ultra-accelerator is suspended. According to an example, rubber goods are immersed in a suspension in water of 10 parts of the carbon disulphide derivative of the reaction product of piperidine and formaldehyde, 1 part of oleic acid, and 0.2 parts of sodium hydroxide per thousand, heated to 200-210‹ F. The proportion of accelerator may be varied according to the thickness of the article, the time of heating, and the conductivity of the mould when employed. Other suitable accelerators specified include the carbon disulphide derivatives of aliphatic aldehydes with secondary aliphatic amines, alkyl derivatives of piperidine, pyrollidine, dialkylamines, dibenzylamine: while as protective colloid may be employed sodium or potassium salts of fatty acids as stearic or palmitic acids, gum arabic, paponin ...

Improvements in or relating to processes for facilitating the treatment of fibrous threads impregnated with rubber

... 405,032. Treating yarns. BONGRAND, J. E. C., 95, Rue de Monceau, Paris, and LEJEUNE, L. S. M., 1, Place Gambetta, Wasquehal, Nord, both in France. July 29, 1932, No. 2870/33. Divided on 405,312. [Class 120 (iii).] Rubber-impregnated yarns or threads are coated with a powder to facilitate after treatment such as vulcanizing or weaving. The powder may be sulphur, zinc carbonate, zinc oxide, zinc salts of fatty acids, and the like. Zinc stearate with or without zinc oxide is preferred. This produces a slippery surface, and enables the threads to be woven, after which the rubber can be vulcanized if sulphur has been added to the impregnating solution, or the fibre has been mordanted with a vulcanizing agent prior to the impregnation. A thread 2 is passed from a bobbin 14 over a roll 15 which dips into powder in a trough 17. From there it is led to a bobbin 21 mounted on a bell-crank 22. When full, the bobbin 21 is released by operating a handle 25. The shaft 16 of the roll 15 may carry a cam ...

SHEET MATERIAL SHOWING HIGH INFRARED TRANSMITTANCY

... 1377664 Producing cross-linked polyethylene sheets N LAING 8 June 1972 [15 June 1971] 26842/72 Heading B5A [Also in Division C3] A process for the production of cross linked polyethylene sheet material which is transparen to infra red radiation and resistant to ultra violet radiation comprises extruding a polyethylene tube, heating the tube in an inert gas to cross link it (without the use of means such as irradiation or radical initiators) and cutting the tube to form a sheet. The heating effect may be provided either by subjecting the tube to a pressure of 3000 to 15000 atmos. or by blowing the tube against a mould which has been inductively heated to 450‹ C. The sheet is suitable for use as a roofing material.

Fiberglass nonwoven catalyst

Encapsulated cure systems

Encapsulated cure systems are provided wherein a curative is incorporated into a solid or semi-solid carrier material whereby mere fracturing or failure of the capsule wall encapsulating such cure systems will not provide for or allow sufficient release of the curative. Also provided are adhesive systems incorporating said encapsulated cure systems.

Method for manufacturing cured product of thermosetting resin composition and cured product obtained thereby

The present invention relates to a method for producing a cured product of a thermosetting resin composition, the method including: heating a thermosetting resin composition including the following ingredients (A) to (C) at a temperature of 100 to 200° C. for 1 to 60 minutes; and then further heating the thermosetting resin composition at a temperature of 220 to 350° C. for 10 to 6,000 minutes, thereby curing the thermosetting resin composition: (A) an allyletherified phenol resin; (B) an epoxy resin; and (C) a curing accelerator.

Emissive semi-interpenetrating polymer networks

An emissive semi-interpenetrating polymer network (E-semi-IPN) includes a semi-interpenetrating polymer network and an emissive material interlaced in the polymer network. The semi-interpenetrating polymer network includes in a crosslinked state one or more of a polymerized organic monomer and a polymerized organic oligomer, polymerized water soluble polymerizable agent, and one or more polymerized polyfunctional cross-linking agents. The E-semi-IPN may be employed as an E-semi-IPN layer ( 16, 36, 56 ) in organic light emitting devices ( 10, 20, 30, 40 ).

Sequentially cross-linked polyethylene

A method of producing an improved polyethylene, especially an ultra-high molecular weight polyethylene utilizes a sequential irradiation and annealing process to form a highly cross-linked polyethylene material. The use of sequential irradiation followed by sequential annealing after each irradiation allows each dose of irradiation in the series of doses to be relatively low while achieving a total dose which is sufficiently high to cross-link the material. The process may either be applied to a preformed material such as a rod or bar or sheet made from polyethylene resin or may be applied to a finished polyethylene part.

Anion exchange membrane and method for producing same

There is provided an anion exchange membrane comprising, as a main element, a block copolymer having a vinyl alcohol polymer block and a cationic-group containing polymer block as components and which is subjected to a crosslinking treatment. An anion exchange membrane is produced by heating a film obtained from a solution of the block copolymer at a temperature of 100° C. or more, crosslinking the film with a dialdehyde compound in water, an alcohol or a mixture of these under an acidic condition and then washing the film with water. Thus, there can be provided an anion exchange membrane in which organic fouling can be prevented and which exhibiting excellent basic properties such as a membrane resistance and an ionic transport number and excellent membrane strength.

Water absorbent resin production method, water absorbent resin, and usage thereof

A method for producing a water absorbent resin by (i) polymerizing a monomer including an unsaturated monomer containing a carboxyl group, in the presence of an internal cross-linking agent (A) having two or more radical polymerizable unsaturated groups and in the presence of a non-polymeric internal cross-linking agent (B) having two or more functional groups each allowing formation of an ester bond or an amide bond by reacting with a carboxyl group, while crushing a cross-linked polymer hydrogel; and (ii) drying the cross-linked polymer hydrogel of step (i), wherein: an amount of the internal cross-linking agent (A) is 0.01 mol % or more and 0.2 mol % or less relative to an amount of the unsaturated monomer containing a carboxyl group, and a molar ratio (B)/(A) of the internal cross-linking agent (A) and the non-polymeric internal cross-linking agent (B) is 0.01 or more and 1.8 or less.

Methods to produce polymer nanoparticles and formulations of active ingredients

The present invention provides a composition including a polymer nanoparticle and at least one agricultural active compound incorporated with the nanoparticle, wherein the nanoparticle are less than 100 nm in diameter, and the polymer includes a polyelectrolyte.

Resin composition for laser engraving, relief printing plate precursor for laser engraving and process for producing same, and relief printing plate and process for making same

A resin composition is provided that includes (Component A) a filler having an ethylenically unsaturated group, (Component B) a polymerizable compound having an ethylenically unsaturated group, and (Component C) a polymerization initiator. There are also provided a relief printing plate precursor, a process for producing a relief printing plate precursor that includes a layer formation step of forming a relief-forming layer and a crosslinking step of thermally crosslinking the relief-forming layer, and a process for making a relief printing plate that includes an engraving step of laser-engraving the crosslinked relief-forming layer so as to form a relief layer.

Crosslinked Polyolefin Polymer Blends

Crosslinked polyolefin blends, methods for their production, and articles made of the same are provided. In at least one specific embodiment, the polyolefin blends comprise a first polymer formed in a first reactor and a second polymer formed in a second reactor. The first and second polymers, as well as the resulting blend, may comprise units derived from propylene, ethylene, and a diene. The blended composition can then be compounded with one or more coagents, antioxidants, UV sensitizers, and/or other additives and crosslinked, preferably by exposure to UV radiation and/or energetic photons. The crosslinked polymers are particularly useful for making fibers, films, and nonwovens.

Crosslinked Flame Retardant Thermoplastic Elastomer Gels

Crosslinked flame retardant thermoplastic elastomer gels are provided. The crosslinked flame retardant thermoplastic elastomer gels comprise a char catalyst, a char former, a maleic anhydride-modified styrene ethylene/butylene styrene polymer, and a softener oil. Methods are provided of making crosslinked flame retardant thermoplastic elastomer gels.

Isocyanate-free silane-crosslinking compounds

The invention relates to compounds (K) comprising A) 100 parts by weight of a pre-polymer (P) comprising units (E) in the backbone thereof that are selected from polyether and polyester units, wherein the pre-polymer (P) comprises at least one end group of the general formula (1) -L 1 -(CH 2 ) y —SiR 2 3-x (OR 1 ) x (1), B) 1 to 100 parts by weight of silane (S) of the general formula (2) R 4 SiR 2 3-Z (OR 1 ) z (2), (G) 0 to 10 parts by weight of a curing catalyst (HK) that accelerates the curing of the compounds (K) in the presence of humidity, wherein L 1 represents a divalent linking group selected from —O—, —S—, —(R 3 )N—, —O—CO—N(R 3 )—, —N(R 3 )—CO—O—, —N(R 3 )—CO—NH—, —NH—CO—N(R 3 )—, —N(R 3 )—CO—N(R 3 ) and R 1 , R 2 , R 3 , x, y and z have the meanings cited in claim 1. R 4 are hydrocarbon radicals having at least 7 hydrogen atoms. According to the invention, after hardening, the compounds (K) have high shear strength and are used as adhesives (K).

Particulate water absorbent and process for production thereof

A particulate water absorbing agent of the present invention is a water absorbing agent containing a water absorbing resin as a main component, the particulate water absorbing agent containing a polyvalent metal cation and satisfying: (1) the polyvalent metal cation is contained in an amount between 0.001 wt % and 5 wt % relative to the amount of the water absorbing agent; (2) an absorbency without pressure (CRC) is not less than 28 (g/g) and an absorbency against pressure (AAP 4.83 kPa) is not less than 10 (g/g); (3) the absorbency against pressure and the absorbency without pressure satisfy 77≦AAP (4.83 kPa)+1.8×CRC≦100; and (4) a moisture content of the water absorbing agent is between 5 wt % and 20 wt %. This provides a water absorbing agent which has blocking resistance after moisture absorption, is excellent in stability to shock and suppresses Re-Wet when used in a diaper.

Viscoelastic gels as novel fillers

Biomaterials obtainable by mixing the autocrosslinked derivative of hyaluronic acid (ACP) with the derivative (HBC) of hyaluronic acid crosslinked with 1,4-butanediol diglycidyl ether (BDDE) in the weight ratio of between 10:90 and 90:10 as novel fillers.

Stabilized humidity-curable polymers having 2-phase curing kinetics

The invention relates to stabilized mixtures (M) comprising a polymer (P) that can be humidity-cured into a cured polymer (PV), wherein the polymer (P) comprises hydrolysable silane groups at least one location not corresponding to the two ends of the main polymer chain, and silane (W) having at least one hydrolysable group as a water catcher, reacting faster with water at 25° C. and 1 bar than the humidity-curing polymer (P), and to a method for curing polymers (P) in mixtures (M) by means of water and particular silanes (W).

Method for re-wetting surface post-cross-linked, water-absorbent polymer particles

A process for producing water-absorbing polymer particles, wherein surface postcrosslinked water-absorbing polymer particles are remoisturized and classified, and wherein the time between remoisturization and classification is at least 15 minutes.

Crosslinkable fluororubber composition and crosslinked rubber article

Obtaining a crosslinked rubber with high flexibility at low temperature includes crosslinking a fluororubber composition. The fluororubber composition includes a fluororubber and a compound of formula (X—) x (Z—) z Y. In the formula, X is U—(CF 2 ) a O(CF 2 CF 2 O) b —; Z is R F O(CF 2 CF 2 O) c —; Y is a (x+z) valent perfluoro saturated hydrocarbon group, optionally interrupted by an etheric oxygen atom; x is an integer of at least 3; z is an integer of at least 0; U is a monovalent group with an unsaturated hydrocarbon, a bromine atom, an iodine atom, or a combination thereof; R F is a C 1-20 linear perfluoroalkyl group, optionally interrupted by an etheric oxygen atom; a is an integer of from 0 to 20; b is an integer of from 1 to 200; and c is an integer of from 3 to 200.

Preparation of polyphosphazene microspheres

Methods of producing polyphosphazene microspheres comprising admixing aqueous solutions of a water-soluble polyphosphazene and an organic amine, or salt thereof, are disclosed.

Activated resol cure rubber composition

The invention is related to a vulcanizable rubber composition comprising an elastomeric polymer, a phenol formaldehyde resin cross-linker, and an activator package characterized in that the vulcanizable rubber composition comprises an activated zeolite. The invention also relates to a process for the manufacture of a vulcanized article comprising the steps of preparing a vulcanizable rubber composition, shaping the vulcanizable rubber composition and vulcanizing the shaped rubber composition. The invention further relates to a vulcanized article.

Synthetic turf having cooling layer

The present invention describes a synthetic turf having super absorbent materials in order to keep the synthetic turf cooler than conventional synthetic turfs. The present invention also provides for synthetic turf infill cooling particles comprising a layer of water-absorbing material coating a foundation comprising a core substrate. In one embodiment, the cooling particle is comprised of a core particle or substrate, which is coated with a water-absorbing material. In one embodiment, the water-absorbing material is a super absorbent polymer.

EPDM foam and adhesive sealing material

An EPDM foam contains an ethylene-propylene-diene rubber, in which the EPDM foam has water stopping performance lasting for 1 hour or more according to 50% waterstop test and metal corrosion is not observed according to metal corrosion test.

Method for producing silicone rubber compound and silicone rubber composition

A method for producing a silicone rubber compound in a reduced blending time and which imparts excellent resistance to plasticity reversion, and the cured silicone rubber prepared without heat treatment has excellent resistance to compression set. The method comprises mixing components: (A) an organopolysiloxane having a polymerization degree of at least 100 represented by the following average compositional formula (I): R 1 a SiO (4−a)/2   (I) wherein R 1 is independently a substituted or unsubstituted monovalent hydrocarbon group, and a is 1.95 to 2.05; (B) a reinforcing silica having a specific surface area as measured by BET absorption method of at least 50 m 2 /g, (C) an alkoxysilane represented by the following formula (II): R 2 m Si(OR 3 ) 4−m   (II) wherein R 2 is independently hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group, R 3 is independently a substituted or unsubstituted alkyl group, and m is 0, 1, 2, or 3, and (D) water, and the heat treatment.

Reactive mixture for coating molded objects by means of reaction injection molding and coated molded object

The invention relates to an injection moulding machine containing a reactive mixture including at least 40% by weight of (meth)acrylates having at least two double bonds, at least one photoinitiator, and at least one thermal initiator.

Crosslinked Hydrogels and Related Method of Preparation

The present invention provides a method of manufacturing a hydrogel comprising the step of crosslinking a biopolymer using a carbodiimide crosslinker of Formula I wherein at least one of R 1 and R 2 is a functional group that is a bulky organic functional group. R 1 and R 2 can each independently be an optionally substituted saturated or unsaturated functional group selected from the group consisting of an alkyl, a cycloalkyl, a heterocyclic, and an aryl. The bulky organic functional group will slow down the crosslinking reaction of carbodiimide due to the steric effects and/or electronic effects, in comparison to a crosslinking reaction using EDC. Also provided are the hydrogels and ophthalmic devices prepared using the method of the invention and uses thereof.

Resin suitable for construction purposes comprising norbornene functional groups and thiols

The present invention relates to a thermosetting resin composition suitable for construction purposes comprising (i) a thiol, (ii) a resin containing at least one norbornene group and having a molecular weight Mn of at least 500 Dalton, and (iii) a methacrylate containing compound whereby the resin composition comprises methacrylate containing compound in an amount of at least 5 wt % and at most 75 wt %, whereby 100 wt. % is the sum of methacrylate containing compound and resin containing at least one norbornene group. The present invention further relates to a two-component resin system consisting of component A and component B, wherein one of the components (A) comprises a resin containing at least one norbornene group and a methacrylate containing compound, whereby component (A) contains methacrylate containing compound in an amount of at least 5 wt % and at most 75 wt %, whereby 100 wt. % is the sum of methacrylate containing compound and resin containing at least one norbornene group; and the other component (B) comprises a thiol and a peroxide.

Transparent bacterial cellulose nanocomposite hydrogels

A transparent polymeric nanocomposite hydrogel is provided, wherein the polymeric nanocomposite hydrogel is made from a water insoluble polymer, i.e. poly(2-hydroxyethyl methacrylate) (PHEMA) or/and crosslinked PHEMA and a water insoluble nanofiber, i.e., bacterial cellulose (BC). Disclosed is a synthetic route for polymeric nanocomposites hydrogels. The preferred polymeric nanocompositions are produced through free radical polymerization of HEMA monomer in the presence of bacterial cellulose with an assistance of ultrasound to enhance the mixing of bacterial cellulose, initiator, and the monomers. The polymeric nanocomposite hydrogel is then formed by immersion of the dry polymeric nanocomposite in water. Disclosed is a high transmittance polymer nanocomposite hydrogel with a preferred BC loading less than 0.1%, water content of about 40% in weight, good mechanical integrity and strength. The disclosed polymer nanocomposite hydrogel and compositions pertain to hydrogel applications, particularly contact lenses and optic components for biosensor.

Method for synthesizing calixarene and/or cyclodextrin copolymers, terpolymers and tetrapolymers, and uses thereof

The present invention relates to a novel method for synthesizing a composition of polymers, copolymers, terpolymers and tetrapolymers, and to the use thereof, said composition being made from: cyclodextrins, in particular α-cyclodextrin, β-cyclodextrin, γ-cyclodextrin, the derivatives thereof or the corresponding mixtures thereof; and/or calix[n]arene(s) and/or calix[n]arene derivative(s) and/or a mixture of two or more different calix[n]arenes selected from calix[n]arenes (n=4-20) and/or the derivatives thereof, and to the uses thereof. A method was developed on the basis of bulk polycondensation by heating. The invention can be used in the pharmaceutical, human medicine, veterinary medicine, chemistry, separation chemistry, environmental, electronics, biology, diagnostics, phytosanitation, medicinal food, agri-food, and cosmetics fields, and in the nutraceutical field and in the field of molecular imprints (MIP).

Phase separated composite

A composite is disclosed. The composite comprises a first conjugate of a polymer and a first phenol-containing moiety, and a second conjugate of a gelatin or collagen and a second phenol-containing moiety, wherein the polymer is selected so that the first conjugate is less cell-adhesive than the second conjugate, at least one of the first and second conjugates is crosslinked to form a matrix, and the composite comprises discrete regions that are rich in one of said first and second conjugates. A method of forming such composite is also disclosed. The method comprises mixing precursors for the first and second conjugates in a solution for forming said composite, and dispersing a catalyst in the solution to catalyze crosslinking of at least one of the first and second conjugates to form the matrix. The composite may be used to grow cells.

Polysaccharide Based Hydrogels

Polysaccharide based hydrogel compositions and methods of making and using the same are provided. The subject polysaccharide based hydrogel compositions are prepared by combining a polysaccharide component with a hydrophilic polymer and a cross-linking agent. Also provided are kits and systems for use in preparing the subject compositions.

Sequentially cross-linked polyethylene

A method of producing an improved polyethylene, especially an ultra-high molecular weight polyethylene utilizes a sequential irradiation and annealing process to form a highly cross-linked polyethylene material. The use of sequential irradiation followed by sequential annealing after each irradiation allows each dose of irradiation in the series of doses to be relatively low while achieving a total dose which is sufficiently high to cross-link the material. The process may either be applied to a preformed material such as a rod or bar or sheet made from polyethylene resin or may be applied to a finished polyethylene part.

Coated wire and method of manufacturing the same

A coated wire includes a core wire, one or more grooved insulation layer coating the core wire, the grooved insulation layer including a silane-crosslinked insulating resin composition and a groove on an outer surface thereof, and a sheath layer coating an outermost layer of the grooved insulation layer.

Using the light adjustable lens (lal) to increase the depth of focus by inducing targeted amounts of asphericity

In general, the present invention relates to optical elements, which can be modified post-manufacture such that different versions of the element will have different optical properties. In particular, the present invention relates to lenses, such as intraocular lenses, which can be converted into aspheric lenses post-fabrication. Also, the present invention relates to a method for forming aspheric lenses post-fabrication.

Hydrophilic gels from polyurethane-based photoinitiators

The present invention relates to the use of polymeric photoinitiators based on polyalkyletherurethane backbones in the production of hydrophilic gels, in particular hydrogels. The invention relates to methods for manufacturing hydrophilic gels using said polymeric photoinitiators, and the hydrophilic gels thus obtained.

COMPOSITE MATERIALS

A process for the manufacture of a cured composite material, the process comprising the steps of blending together a liquid curable resin and a curing agent having a melting point greater than 100° C. to form a liquid blend of curable resin and curing agent, at least partially impregnating a structural fibre arrangement with the blended curable resin and curing agent to form a curable composite material, followed by curing the composite material by exposure to elevated temperature and at a pressure of no greater than 3 bar absolute to form a cured composite material. 1. A process for preparing a reinforcement resin comprising the steps of:a. providing a liquid curable resin;b. providing a curing agent as a solid;c. continuous blending of said curing agent with said liquid curable resin to dissolve the curing agent within said liquid curable resin to form a liquid blend, wherein said continuous blending comprises passing said curable resin and said curing agent through a blender that comprises an entrance, a blending zone and an exit and wherein said liquid blend that flows from said exit is at a temperature of from 70° C. to 150° C.; andd. cooling said liquid blend 7 said liquid blend flows from the exit of said blender to form the reinforcement resin.2. The process of claim 1 , wherein the residence time of said curing agent and liquid curable resin as they pass through said blender ranges from 1 second to 10 minutes.3. The process of claim 1 , wherein said cooling is conducted by increasing the surface area of said liquid blend that is exposed to a cooling medium.4. The process of claim 1 , wherein said liquid blend is cooled by casting of the liquid blend or by impregnation of a structural fibre component with said liquid blend.5. The process according to claim 1 , wherein said liquid curable resin comprises a toughener.6. The process of which includes the additional step of partially impregnating a structural fibre arrangement with said reinforcement resin to ...

Water-repellent fine particles and making method

Silicone elastomer spherical particles having a volume mean particle size of 0.1-100 μm are coated with a polyorganosilsesquioxane and washed with alcohol or a mixture of alcohol and water. The coated fine particles are water repellent so that they are non-dispersible in water and float on water.

Methods and compositions for textile layers and coatings

A method for preparing a solid composite material comprising a structural polymer matrix and a thermo-responsive hydrogel involves forming a substantially homogeneous blend of a cross-linkable compound and monomer, oligomer or polymer particles in a blended aqueous liquid, inducing the cross-linkable compound to cross-link to form the thermo-responsive hydrogel and forming the structural polymer matrix from the structural polymer by a further induction means.

Thermoplastic composition, method of producing the same, and articles made therefrom

The instant invention provides a thermoplastic composition, method of producing the same, and articles made therefrom. The thermoplastic composition according to present invention comprises the melt blending product of: (a) from 10 to 75 percent by weight of a continuous phase, based on the total weight of the thermoplastic composition, wherein said continuous phase comprises one or more thermoplastic polymers; and (b) from 25 to 90 percent by weight of a dispersed phase comprising one or more core/shell polymer particles, based on the total weight of the thermoplastic composition, wherein said one or more core/shell polymer particles comprise a crosslinked elastomer core and a thermoplastic shell and wherein said core/shell polymer has an average particle size diameter in the range of from 70 to 10,000 nm.

Surface modification to improve lubricity, abrasion resistance and temperature resilience of leads

A medical electrical lead body having an outer surface and including at least one lumen having an inner surface treated with a silane surface modifying agent to form a three-dimensional, densely cross-linked lubricious coating over at least a portion of the inner surface of the lumen. The outer surface of the lead body also may be similarly treated. The lubricious silane coating may reduce the coefficient of friction of the coated surface of the lead body by as much as 80% when compared to an uncoated surface. A reduction in the coefficient of friction may enhance the stringing efficiency of a conductor through the lead body lumen and may enhance its abrasion resistance.

Method for Preparing a Degradable Polymer Network

The present invention relates to methods for preparing a degradable polymer network. The methods for preparing a degradable polymer network comprise a) preparing a polymer composition comprising monomers of cyclic carbonates and/or cyclic esters and/or linear carbonates and/or linear esters and/or cyclic ethers and/or linear hydroxycarboxylic acids at a temperature between 20° C. and 200° C.; b) adding a cross-linking reagent comprising at least one double or triple C—C bond and/or a cross-linking radical initiator; c) processing the polymer composition (that contains the crosslinking reagentj into a desired shape; d) Crosslinking by irradiating the mixture. Further, the present invention relates to a degradable polymer network. Furthermore, the present invention relates to the use of the degradable polymer network.

METHOD OF PRODUCING ABSORBENT RESIN

Provided is a method which does not require alteration of the raw materials or high capital investment, and improves and stabilizes the physical property (for example, liquid permeability) of a water absorbent resin by means of a simple technique. A method for producing a water absorbent resin is disclosed, which method includes a polymerization step of polymerizing an aqueous solution of acrylic acid (salt) to obtain a water-containing gel-like crosslinked polymer; a drying step of drying the water-containing gel-like crosslinked polymer to obtain a water absorbent resin powder; a classification step of classifying the water absorbent resin powder; and a surface crosslinking step of surface crosslinking the water absorbent resin powder, wherein in the classification steps that are carried before the surface crosslinking step and/or after the surface crosslinking step, the stretch tension (tension) of the metal sieve mesh used in the classification step is from 35 [N/cm] to 100 [N/cm]. 129-. (canceled)30. A method for producing a water absorbent resin comprising:a polymerization step of polymerizing an aqueous solution of acrylic acid (salt) to obtain a water-containing gel-like crosslinked polymer;a drying step of drying the water-containing gel-like crosslinked polymer to obtain a water absorbent resin powder;a classification step of classifying the water absorbent resin powder; anda surface crosslinking step of surface crosslinking the water absorbent resin powder,wherein in the classification step that is carried before the surface crosslinking step and/or after the surface crosslinking step, the tension (tension) of a metal sieve mesh used in the classification step is from 35 [N/cm] to 100 [N/cm].31. A method for producing a water absorbent resin comprising:a polymerization step of polymerizing an aqueous solution of acrylic acid (salt) to obtain a water-containing gel-like crosslinked polymer;a drying step of drying the water-containing gel-like crosslinked ...

Crosslinked blends of polyphenylene sulfide and polyphenylsulfone for downhole applications, methods of manufacture, and uses thereof

A composition includes a crosslinked product of a polyphenylene sulfide and a polyphenylsulfone. A method for the manufacture of the crosslinked product of a polyphenylene sulfide and a polyphenylsulfone includes heating the polyphenylene sulfide and the polyphenylsulfone in presence of a crosslinking agent at a temperature and for a time effective to form the crosslinked product of polyphenylene sulfide and polyphenylsulfone.

Process for superabsorbent polymer and crosslinker composition

The present invention further relates to a process to make a superabsorbent polymer comprising the steps of a) preparing a neutralized monomer solution comprising a polymerizable monomer selected from unsaturated acid groups-containing monomers, ethylenically unsaturated carboxylic acid anhydride, salts, or derivatives thereof and a caustic agent selection from an alkali agent, wherein the polymerizable monomer is neutralized to from about 50 mol % to about 85 mol %; b) forming a crosslinker monomer mixture by adding an internal crosslinker composition to the neutralized monomer solution wherein the internal crosslinking composition is the reaction product of a stoichiometric excess of amine with a glycidyl compound, wherein the internal crosslinker composition has a residual amount of glycidyl compounds of less than about 500 ppm based on the mass of the internal crosslinker composition; and c) polymerizing the crosslinker monomer mixture to make a superabsorbent polymer.

Rubber mixtures

The invention relates to rubber mixtures comprising (A) at least one polyacrylate rubber, (B) at least one silicatic or oxidic filler or carbon black and (C) at least one epoxysilane. The rubber mixtures can be used to produce mouldings.

Pressure-sensitive adhesives with onium-epoxy crosslinking system

A pre-adhesive composition is described comprising an acid- and epoxy-functional (meth)acryloyl copolymer, which when crosslinked with or without using an ionic photoacid generator (PAG) provides a pressure-sensitive adhesive and pressure-sensitive adhesive articles having desirable properties.

HIGHLY CRYSTALLINE POLYETHYLENE

The present invention relates to methods for making highly crystalline polymeric material, for example, highly crystalline cross-linked and not cross-linked ultra-high molecular weight polyethylene (UHMWPE). The invention also provides methods of making additive-doped highly crystalline polymeric material using high pressure and high temperature crystallization processes, medical implants made thereof, and materials used therein. 1. A method of making a cross-linked and interlocked hybrid material for a medical device or implant , wherein the method comprises:a) mixing a polymeric material with an antioxidant to form a polymeric blend;b) compression molding of the polymeric blend to the counterface of second material, thereby forming an interlocked hybrid material having an interface between the polymeric blend and the second material; andc) irradiating the interlocked hybrid material by electron beam radiation at an elevated temperature that is between about 80° C. and below the melting point of the polymeric blend, thereby forming cross-links in the polymeric blend and yielding a cross-linked and interlocked hybrid material for a medical device or implant, wherein: (i) the cross-linking strengthens the polymeric blend to minimize separation at the interface, (ii) the antioxidant provides resistance to post-irradiation oxidation, and (iii) the irradiation sterilizes the interface.2. The method according to claim 1 , wherein the second material is porous so as to permit bony in-growth into the medical device or implant.3. The method according to claim 2 , wherein the second material is metallic.4. The method according to claim 2 , wherein the second material is non-metallic.5. The method according to claim 1 , wherein the polymeric material is ultrahigh molecular weight polyethylene.6. The method according to claim 1 , wherein the anti-oxidant is an α-tocopherol.7. A method of making a medical device or implant comprising a cross-linked and interlocked hybrid ...

Process for producing vulcanized rubber composition

A process for producing a vulcanized rubber composition that includes S-(3-aminopropyl)thiosulfuric acid, a rubber component, a filler, a sulfur component, and a vulcanization accelerator, the process comprising the following Steps (A), (B) and (C); (A): a step of kneading S-(3-aminopropyl)thiosulfuric acid having a median diameter (50% D) of 10 μm to 100 μm, a rubber component and a filler, (B): a step of kneading the kneaded mixture obtained in Step (A), a sulfur component and a vulcanization accelerator, and (C): a step of subjecting the kneaded mixture obtained in Step (B) to thermal treatment.

Crosslinked polymer compound, resin compound and resin molded product

There is provided a crosslinked polymer compound, including: a crosslinked structure formed by reaction of a carboxyl group of polylactic acid having at least a carboxyl group at an end of a polymer chain of the polylactic acid with a hydroxyl group of a lignophenol derivative having at least a hydroxyl group in a molecular structure of the lignophenol derivative, wherein the compound comprises a high-molecular weight component insoluble in hexafluoroisopropanol and a low-molecular weight component soluble in hexafluoroisopropanol, a content ratio of the high-molecular weight component is from 2% by mass to 75% by mass based on the total amount of the high-molecular weight component and the low-molecular weight component, and the low-molecular weight component has a weight average molecular weight of 100,000 or more.

Process for Producing Surface Postcrosslinked Water-Absorbing Polymer Particles

A process for producing surface postcrosslinked water-absorbing polymer particles, wherein the water-absorbing polymer particles are coated, before, during or after the surface postcrosslinking, with at least one salt of a trivalent metal cation and a glycinate anion.

Reinforced fluoropolymer composites comprising surface functionalized nanocrystalline cellulose

A reinforced fluoropolymer composite is presented, which includes a fluoropolymer and a fluoro-functionalized nanocrystalline cellulose in which the outer circumference of the nanocrystalline cellulose has been functionalized with fluorinated substrates. The fluoro-functionalized nanocrystalline cellulose may be used to produce stable dispersions with fluoropolymers exhibiting enhanced adhesion between the nanocrystalline particles and fluoropolymer in a composite material, and decreased surface free energy of the cellulose surface.

Method for the Continuous Production of Water Absorbent Polymer Particles

A process for continuously preparing water-absorbing polymer beads, comprising the drying of a polymer gel on a forced-air belt dryer, the water content of the polymer gel being used to control the forced-air belt dryer during or after the drying.

CROSS-LINKING METHOD AND ARTICLES PRODUCED THEREBY

A method for cross-linking a styrenic polymer, the method comprising providing a partly sulphonated styrenic polymer and cross-linking the partly sulphonated styrenic polymer in the presence of a polyphosphoric acid. 1. A method for cross-linking a styrenic polymer , the method comprising:providing a partly sulphonated styrenic polymer; andcross-linking the partly sulphonated styrenic polymer in the presence of a polyphosphoric acid.2. The method of claim 1 , wherein the styrenic polymer is selected from a group consisting of a homopolymer of a styrenic monomer claim 1 , a copolymer of a styrenic monomer with one or more comonomers claim 1 , and a combination thereof.3. The method of claim 1 , wherein the cross-linking is carried out at a temperature of about 100° C. or greater.4. The method of claim 1 , wherein the cross-linking is carried out at a temperature in the range from about 120° C. to about 200° C.5. The method of claim 1 , wherein the partly sulphonated styrenic polymer has a degree of sulfonation of about 10%-80%.6. The method of claim 1 , wherein the partly sulphonated styrenic polymer has a degree of sulfonation of about 20%-70%.7. The method of claim 1 , wherein the cross-linking is carried out by forming a composition comprising the partly sulphonated styrenic polymer to obtain a molding claim 1 , and immersing the molding into the polyphosphoric acid.8. The method of claim 1 , wherein the molding is selected from a group consisting of a film claim 1 , an ion exchange resin and a hollow fiber.9. The method of claim 1 , wherein the providing the partly sulphonated styrenic polymer comprises the steps of:providing a styrenic polymer;contacting acetic anhydride with concentrated sulfuric acid to form acetyl sulfate; andreacting the acetyl sulfate with the styrenic polymer to obtain the partly sulphonated styrenic polymer.10. An article comprising at least one component comprising a cross-linked polystyrene produced by the a method of . for cross- ...

Cross-linking method and associated device

The invention relates to a method for cross-linking a cross-linkable adhesive composition without solvent on a film, comprising driving and/or guiding said film in a climatic chamber, by a Caroll-type drive or guide. The invention also relates to a climatic chamber comprising a Caroll-type drive or guide. The invention also relates to a process for manufacturing a self-adhesive article comprising at least a substrate and an adhesive layer, said process comprising the steps of: a) conditioning an adhesive composition at a temperature of between 20 and 160° C.; b) coating the adhesive composition b1) onto at least a part of the substrate or b2) onto a non-sticking support; submitting the article obtained at step b) to a controlled atmosphere. The invention also relates to self-adhesive articles having high coating weights and to processes for bonding them.

Process For Producing Thermally Surface Postcrosslinked Water-Absorbing Polymer Particles

A process for producing thermally surface postcrosslinked water-absorbing polymer particles, wherein the water-absorbing polymer particles are coated before, during or after the thermal surface postcrosslinking with at least one complex consisting of a polyvalent metal salt and a 2-hydroxycarboxamide.

Cross-linked polymers and implants derived from electrophilically activated polyoxazoline

One aspect of the invention relates to a biocompatible, covalently cross-linked, polymer that is obtained by reacting an electrophilically activated polyoxazoline (EL-POX) with a nucleophilic cross-linking agent, said electrophilically activated POX comprising m electrophilic groups; and said nucleophilic cross-linking agent comprising n nucleophilic groups, wherein the m electrophilic groups are capable of reaction with the n nucleophilic groups to form covalent bonds; wherein m≧2, n≧2 and m+n≧5; wherein at least one of the m electrophilic groups is a pendant electrophilic group and/or wherein m≧3; and wherein the EL-POX comprises an excess amount of electrophilic groups relative to the amount of nucleophilic groups contained in the nucleophilic cross-linking agent. The invention further relates to biocompatible medical products comprising such a cross-linked POX-polymer. Also provided is a kit for producing a biocompatible, cross-linked POX-polymer. The invention further provides a tissue adhesive medical product comprising at least 1% by weight of dry matter of EL-POX, said EL-POX comprising at least 2 electrophilic groups, including at least one pendant electrophilic group. The polymers according to the invention have excellent implant and/or sealing characteristics.

Accelerator for curing resins

Accelerator solution suitable for forming a redox system with peroxides, comprising a Cu(I) compound, a transition metal selected from cobalt and titanium, a phosphorous-containing compound, a nitrogen-containing base, and a hydroxy-functional solvent.

Rubber Composition Based on a Silicone Elastomer and on a PCM, Process for the Preparation Thereof, Flexible Element and Thermal Control/Regulating System Incorporating Same

A crosslinked rubber composition, process for preparing same, and a flexible component based on at least one room-temperature vulcanizing “RTV” silicone elastomer and including at least one phase change material (PCM) is provided. The flexible element includes at least one elastomer layer capable of storing thermal energy and of releasing it which includes the crosslinked rubber composition. Also provided is a thermal control or regulating system incorporating the flexible element. The composition is such that the silicone elastomer has a viscosity measured at 23° C. according to the ISO 3219 standard which is less than or equal to 5000 mPa.s. The silicone elastomer inlcudes two components A and B and is crosslinked by polyaddition or polycondensation, and the composition includes the PCM, which is not encapsulated and is in the micronized state, in an amount of greater than 50 phr (phr: parts by weight per hundred parts per elastomer(s)).

HIGH PERMEABILITY SUPERABSORBENT POLYMER COMPOSITIONS

The invention relates to absorptive, crosslinked polymeric composition that are based on partly neutralized, monoethylenically unsaturated monomer carrying acid groups wherein the absorptive crosslinked polymer may be coated with a polymeric coating, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which have a high capacity and a high gel bed permeability. 161-. (canceled)62. A process of treating superabsorbent polymer particles with finely-divided , water-insoluble inorganic metal salt comprising the steps of:supplying superabsorbent polymer particles comprisinga) from about 55% to about 99.9% by weight of polymerizable unsaturated acid group containing monomer, based on the superabsorbent polymer; andb) from about 0.001% to about 5% by weight of internal crosslinking agent based on the polymerizable unsaturated acid group containing monomer; wherein the superabsorbent polymer has a degree of neutralization of greater than about 25%; wherein elements a) and b) are polymerized and prepared into superabsorbent polymer particles and further comprising the following surface additives to form surface treated superabsorbent polymer particlesi) from about 0.001% to about 5% by weight of surface crosslinking agent based on the superabsorbent polymer composition;preparing a first solution of a first inorganic metal salt comprising aluminum sulfate;adding to and mixing with the first solution of b) a second solution of a second inorganic metal salt comprising trisodium phosphate, wherein the first solution and second solution react on mixing to precipitate a third water-insoluble metal salt form a water-insoluble metal salt slurry;optionally oxidizing the metal of the water-insoluble metal salt slurry to a higher valence state; andapplying the water-insoluble metal salt slurry to the superabsorbent polymer particles without isolation and drying of the water-insoluble metal salt slurry, and ...

Preparation of Polyphosphazene Microspheres

Methods of producing polyphosphazene microspheres comprising admixing aqueous solutions of a water-soluble polyphosphazene and an organic amine, or salt thereof, are disclosed. 1. A method of producing polyphosphazene microspheres comprising: contacting an aqueous solution containing a water-soluble polyphosphazene with an aqueous solution containing an organic amine or salt thereof , said organic amine crosslinking said polyphosphazene to produce polyphosphazene microspheres.2. The method of claim 1 , wherein said aqueous solution containing a water-soluble polyphosphazene is admixed with said aqueous solution containing an organic amine or salt thereof claim 1 , over an extended period of time.3. The method of claim 1 , further comprising adding water or aqueous buffer solution to stabilize the microspheres.4. The method of claim 1 , further comprising recovering said polyphosphazene microspheres.5. The method of wherein said organic amine is spermine.6. The method of wherein said polyphosphazene is poly[di(carboxylatophenoxy)phosphazene].7. The method of wherein said microspheres have diameters of from about 1 μm to about 10 μm. This application is a continuation of U.S. application Ser. No. 11/982,028, filed Oct. 31, 2007; which is a continuation of U.S. application Ser. No. 10/715,787, filed Nov. 18, 2003; which claims priority to U.S. Provisional Application Ser. No. 60/428,310, filed Nov. 22, 2002; the disclosures of each of which are hereby incorporated by reference in their entireties.Polymer microspheres find numerous uses both in the life sciences and in industrial applications. Kawaguchi, H., 25, pp. 1171-1210, 2000. Medical and biochemical applications include their use as pharmaceutical carriers for a variety of prophylactic and/or therapeutic agents; their use in biospecific separation, immunoassay and affinity diagnosis; and their use as immunoadjuvants. Microspheres also attract attention as materials for optical, opto-electrical, and rheological ...

OLEFIN METATHESIS FOR EFFECTIVE POLYMER HEALING VIA DYNAMIC EXCHANGE OF STRONG CARBON-CARBON BONDS

A method of preparing a malleable and/or self-healing polymeric or composite material is provided. The method includes providing a polymeric or composite material comprising at least one alkene-containing polymer, combining the polymer with at least one homogeneous or heterogeneous transition metal olefin metathesis catalyst to form a polymeric or composite material, and performing an olefin metathesis reaction on the polymer so as to form reversible carbon-carbon double bonds in the polymer. Also provided is a method of healing a fractured surface of a polymeric material. The method includes bringing a fractured surface of a first polymeric material into contact with a second polymeric material, and performing an olefin metathesis reaction in the presence of a transition metal olefin metathesis catalyst such that the first polymeric material forms reversible carbon-carbon double bonds with the second polymeric material. Compositions comprising malleable and/or self-healing polymeric or composite material are also provided. 1. A method of preparing a malleable and/or self-healing polymeric or composite material , comprisingproviding at least one alkene-containing polymer,combining the polymer with at least one homogeneous or heterogeneous transition metal olefin metathesis catalyst to form a polymeric or composite material, andperforming an olefin metathesis reaction on the polymer so as to form reversible carbon-carbon double bonds in the polymer.2. The method of claim 1 , wherein the polymer is polybutadiene claim 1 , polyisoprene claim 1 , butyl rubber claim 1 , polynorbornene claim 1 , polycyclooctene claim 1 , polycyclooctadiene claim 1 , unsaturated polyester claim 1 , polystyrene-b-polybutadiene claim 1 , polystyrene-b-polybutadiene-b-polystyrene claim 1 , a random/block/graft copolymer containing alkene functionality on either polymer backbone or side chain claim 1 , a modification thereof claim 1 , or a combination thereof.3. The method of claim 1 , wherein ...

PHOSPHONIUM IONOMERS COMPRISING PENDANT VINYL GROUPS AND PROCESSES FOR PREPARING SAME

The present invention relates to ionomers comprising a reaction product of the reaction between a halogenated isoolefin copolymer and at least one phosphorus based nucleophile comprising at least one pendant vinyl group. The present invention also relates to a method of preparing and curing these ionomers. 1. An ionomer comprising a reaction product of the reaction between a halogenated isoolefin copolymer and at least one phosphorus based nucleophile comprising at least one pendant vinyl group.2. The ionomer of claim 1 , wherein a halogenated isoolefin copolymer comprises repeating units derived from at least one isoolefin monomer claim 1 , and repeating units derived from one or more multiolefin monomers claim 1 , one or more alkyl substituted aromatic vinyl monomers or a mixture thereof.3. The ionomer of claim 2 , wherein said halogenated copolymer comprises at least one allylic halogen moiety claim 2 , or at least one halo alkyl moiety or both.4. The ionomer of claim 2 , wherein said halogenated copolymer comprises repeating units derived from said at least one isoolefin and repeating units derived from said one or more multiolefin monomers.5. The ionomer of claim 2 , wherein one or more of said repeating units derived from said multiolefin monomers comprise an allylic halogen moiety.6. The ionomer of claim 5 , wherein said one or more multiolefin monomers are selected from C4-C16 conjugated diolefins.7. The ionomer of claim 6 , wherein said conjugated diolefin is isoprene.8. The ionomer of claim 2 , wherein said halogenated copolymer comprises repeating units derived from said at least one isoolefin and repeating units derived from said one or more alkyl substituted aromatic vinyl monomers.9. The ionomer of claim 8 , wherein one or more of said repeating units derived from said aromatic vinyl monomers comprise a halo alkyl moiety10. The ionomer of claim 2 , wherein said halogenated copolymer comprises repeating units derived from said at least one isoolefin ...

Polybutadiene grafted isoprene rubber, processes for preparing polybutadiene grafted isoprene rubber, mixed compositions and vulcanized forms thereof

Disclosed herein are polybutadiene grafted isoprene rubber, processes for preparing polybutadiene grafted isoprene rubber, mixed compositions and vulcanized forms thereof.

Preparation method of superabsorbent polymer

The present invention relates to a method of preparing a superabsorbent polymer, including the steps of: preparing a hydrous gel phase polymer by thermal polymerizing or photo-polymerizing a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying the hydrous gel phase polymer; milling the dried polymer; adding a surface cross-linking agent to the milled polymer; and elevating the temperature of the polymer including the surface cross-linking agent at a speed of 3° C./min to 15° C./min, and carrying out a surface cross-linking reaction at 100° C. to 250° C.

Process for producing water-absorbing polymer particles

The invention relates to a process for producing water-absorbing polymer particles, comprising polymerization, drying the resulting polymer gel on a through circulation belt dryer, crushing the dried polymer gel, pre-grinding, separating of incompletely dried particles with a perforated plate, grinding and classifying the resulting polymer particles.

Anti-vibration rubber composition and anti-vibration rubber

The purpose of the present invention is to provide: an anti-vibration rubber composition which enables the production of a hardened rubber article having excellent heat resistance, compression set, low dynamic magnification, tensile properties (elongation, strength), low-temperature properties and workability (scorch resistance); and an anti-vibration rubber which is produced by hardening the rubber composition. The anti-vibration rubber composition is characterized by comprising a rubber component mainly composed of a diene rubber, a bismaleimide compound as a vulcanizing agent, and N-phenyl-N-(trichloromethylthio)benzenesulfoneamide.

Electret sheet

Provided is an electret having high piezoelectric properties. An electret sheet of the invention is characterized in that it comprises a synthetic resin sheet is electrified by injecting electric charges thereinto, that the synthetic resin sheet comprises two types of synthetic resins incompatible with each other, and that these synthetic resins form a phase separated structure and are cross-linked through a polyfunctional monomer. Therefore, positive and negative charges in an apparently polarized state are present in the interfacial portions between the two types of synthetic resins incompatible with each other. By applying an external force to the electret sheet to deform it, the relative positions of these positive and negative charges are changed, and these changes cause a favorable electrical response. Therefore, the electret sheet has high piezoelectric properties.

SUGAR CHAIN-CAPTURING SUBSTANCE AND USE THEREOF

The present invention provides a method for preparing a sample characterized by binding a substance A containing a hydrazide group to a sugar chain and/or a sugar derivative via hydrazone formation between the hydrazide group of the substance A and the reducing end of the sugar chain and/or the sugar derivative thereby to enable the separation and purification of the sugar chain and/or the sugar derivative for an analytical sample from a biological sample containing the sugar chain and/or the sugar derivative by a simple operation. 154-. (canceled)58. The particle according to claim 55 , wherein the particle has an average particle diameter of equal to or more than 0.1 and equal to or less than 500 μm.59. The particle according to claim 55 , wherein the particle has a hydrazide group of a dry weight of not less than 100 nmol per 1 mg.60. The particle according to claim 55 , wherein the particle is stable at a pH of 3 to 8.61. The particle according to claim 55 , wherein the particle is stable under pressure of not more than 1 MPa.66. A method for preparing a sample claim 55 , wherein the particle according to is bonded to a sugar chain and/or a sugar derivative via a hydrazone bond between the hydrazide group of the particle and the reducing end of the sugar chain and/or the sugar derivative.67. A method for preparing a sample claim 55 , wherein a hydrazone bond is dissociated and a sugar chain and/or a sugar derivative is released by treating the particle according to bonded to the sugar chain and/or the sugar derivative under acidic conditions. The present invention relates to a method for preparing a sample using a prescribed sugar chain-capturing substance, and an analytical sample obtained by the method. The present invention relates to a method for preparing a sugar chain-capturing substance, a compound used for the method and a polymer obtained by polymerizing the compound. Further, the present invention relates to the use of the sugar chain-capturing ...

High hydrocarbon resistant chemically cross-linked aromatic polyimide membrane for separations

This invention relates to high hydrocarbon resistant chemically cross-linked aromatic polyimide polymers, membranes and methods for making and using these polymers and membranes. The high hydrocarbon resistant chemically cross-linked aromatic polyimide membrane described in the present invention comprises a plurality of repeating units of a first aromatic polyimide comprising hydroxyl groups cross-linked with a second aromatic polyimide comprising carboxylic acid groups via covalent ester bonds. These membranes exhibit high permeability and selectivity in separation of mixtures of gases and liquids.

Bioadhesive for Soft Tissue Repair

The present invention provides compositions and methods for repair and reconstruction of defects and injuries to soft tissues. Some aspects of the invention provide tissue adhesives comprising a hybrid hydrogel by using a naturally derived polymer, gelatin and a synthetic polymer, polyethylene glycol, wherein the hydrogel is biocompatible, biodegradable, transparent, strongly adhesive to corneal tissue, and have a smooth surface and biomechanical properties similar to the cornea.

MODIFIED FILLER PARTICLES AND SILICONE COMPOSITIONS COMPRISING THE SAME

Composition of comprising nano metal oxide/hydroxide particles and a polyorganosiloxane having increased refractive index, processes to cure these compositions for making transparent coats, shaped articles by an extrusion or molding process having a refractive index above the refractive index of the polyorganosiloxane. Use of the cured polyorganosiloxane compositions as optical devices, coats, lenses or light guides. 129-. (canceled)32. The composition of claim 31 , wherein L1 is a bond claim 31 , L2 is a C1-C12 alkylene claim 31 , Ris a C1-C22 alkyl claim 31 , and R* is (RO)RSi—.33. The composition of claim 32 , wherein x in R* is 3 claim 32 , and Ris methyl.34. The composition of claim 32 , wherein Ris a C1-C4 alkyl.35. The composition of claim 32 , wherein Ris n-butyl.36. The composition of claim 32 , wherein p is 4 to 9.37. The composition of claim 30 , wherein p is 4 to 9.38. The composition of claim 30 , wherein p is 4 or 9.39. The composition of claim 32 , wherein Ris a C1-C4 alkyl claim 32 , m is 1 claim 32 , and p is 4 to 9.40. The composition of claim 30 , wherein the composition further comprises a crosslinker (C) selected from the group which consists of silanes and siloxanes having reactive groups towards the reactive groups of component (B) claim 30 , whereby the reactive substituents of the crosslinker component (C) are selected from the group which consists of SiH claim 30 , alkenyl claim 30 , alkoxy claim 30 , amino claim 30 , carboxy claim 30 , epoxy claim 30 , and thiol groups.41. The composition of claim 30 , wherein the composition further comprises a crosslinker (C) selected from the group of hydrocarbons without silicon atoms.42. The composition of claim 30 , wherein the metal in the metal oxide or metal hydroxide component (A) is selected from the group of Ti claim 30 , Zr claim 30 , Hf claim 30 , Sn claim 30 , Ce claim 30 , Al claim 30 , As claim 30 , In claim 30 , Zn claim 30 , Ge claim 30 , Sb claim 30 , Cr claim 30 , Cd claim 30 , W claim ...

WEAR-RESISTANT UNISOLE HAVING IMPROVED TRACTION

In one embodiment, a composition comprising the reaction product of an olefin block copolymer, a silicone polymer, a blowing agent, and a crosslinking agent. Also, a unisole for an article of footwear comprising the foamed composition and having ground-engaging protrusions. The composition provides an optimized balance between coefficient of traction and durability. 1. A composition comprising the reaction product of:an olefin block copolymer;a silicone polymer;a blowing agent; anda crosslinking agent.2. The composition of claim 1 , further comprising an ionic conductor anti-static agent.3. The composition of claim 2 , wherein the ionic conductor anti-static agent comprises an octane-1-sulfonate.4. The composition of claim 1 , wherein the olefin block copolymer is an ethylene/olefin block polymer.5. The composition of claim 4 , wherein the olefin is an α-olefin having between 3 and about 30 carbon atoms.6. The composition of claim 1 , wherein the composition comprises about 75 phr olefin block copolymer.7. The composition of wherein the silicone polymer is present in an amount of 25 phr.8. The composition of claim 1 , wherein the composition is a foam having a density of between about 0.2 and about 0.3 g/cc.9. A unisole for an article of footwear claim 1 , the unisole comprising a foamed olefin block copolymer/silicone polymer blend; the unisole comprising:a plurality of ground-engaging protrusions having a length and recessed portions between them;the ground-engaging protrusions having a first total area;the recessed portions having a second total area;wherein the ratio of the first total area to the second total area is between about 45:55 to about 65:35.10. The unisole of claim 9 , wherein the ration of the first total area to the second total area is between about 50:50 to about 60:40.11. The unisole of claim 9 , wherein the length of the protrusions is between about 0.5 mm and about 8 mm.12. The unisole of wherein the length of the protrusions is between about ...

INTERPENETRATING NETWORKS WITH COVALENT AND IONIC CROSSLINKS

The invention features a composition comprising a self-healing interpenetrating network hydrogel comprising a first network and a second network. The first network comprises covalent crosslinks and the second network comprises ionic or physical crosslinks. For example, the first network comprises a polyacrylamide polymer and second network comprises an alginate polymer. 136.-. (canceled)37. An interpenetrating networks hydrogel comprising a first network and a second network , wherein:the first network comprises a covalently crosslinked polymer selected from the group consisting of polyacrylamide, poly(vinyl alcohol), poly(ethylene oxide) and its copolymers, polyethylene glycol (PEG), methacrylated PEG, and polyphosphazene; andthe second network comprises an ionically crosslinked polymer selected from the group consisting of alginate, chitosan, and agarose; andthe covalently crosslinked polymer has a crosslinking density that is derived from a weight ratio between a covalent crosslinking agent and a monomer of the covalently crosslinked polymer of between about 0.031 wt. % and 0.124 wt. % based on the monomer weight.38. The hydrogel of claim 37 , wherein the first network and the second network are covalently coupled.39. The hydrogel of claim 37 , wherein the first network comprises polyacrylamide or polyethylene glycol (PEG) and wherein the second network comprises alginate.40. The hydrogel of claim 37 , wherein the covalent crosslinking agent is selected from the group consisting of N claim 37 ,N-methylenebisacrylamide (MBAA) claim 37 , a methacrylate crosslinker claim 37 , N claim 37 ,N′-dicyclohexylcarbodiimide (DCC) claim 37 , 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (ECC) claim 37 , N-hydroxysuccinimide claim 37 , N-hydroxysulfosuccinimide claim 37 , glutaraldehyde claim 37 , and a transglutaminase.41. The hydrogel of claim 37 , wherein the covalently crosslinked polymer has a crosslinking density that is derived from a weight ratio between a covalent ...

COLLAGEN BASED MATERIALS AND METHODS OF USING THEM

Certain configurations of adhesive materials are described which comprise a crosslinked derivatized atelocollagen. In some configurations, the crosslinked, derivatized atelocollagen is cured to provide a burst strength of at least 55 kPa or 60 kPa (or more) as tested by ASTM F2392-04. In some instances, the crosslinked derivatized atelocollagen comprises a methylated atelocollagen that is crosslinked using one or more functionalized crosslinking agents. 1100-. (canceled)101. A method of repairing a tissue defect comprising:disposing a composition at a defect site of the tissue, the composition comprising a derivatized atelocollagen comprising a number average molecular weight of less than or equal to 300 kDa, a first crosslinking agent and a second crosslinking agent different than the first crosslinking agent;adding a curing agent to the disposed composition; andpermitting the curing agent to remain on a surface of the disposed composition for a curing period.102. The method of claim 101 , further comprising rinsing any excess curing agent from the disposed composition after the curing period.103. The method of claim 101 , further comprising adding the curing agent as a solid to the disposed composition.104. The method of claim 101 , further comprising adding the curing agent as a liquid to the disposed composition.105. The method of claim 101 , further comprising configuring the derivatized atelocollagen as methylated atelocollagen.106. The method of claim 105 , configuring one of the first and second crosslinking agents to comprise a succinimidyl group.107. The method of claim 105 , configuring one of the first and second crosslinking agents to comprise a sulfhydryl group.108. The method of claim 101 , further comprising configuring the composition to comprise an acidic pH.109. The method of claim 101 , further comprising layering the composition over the defect site prior to curing the composition.110. The method of claim 101 , further comprising configuring the ...

METHOD FOR PRODUCING RUBBER PARTICLES WITH REDUCED COAGULATION TENDENCY, METHOD FOR PRODUCING PNEUMATIC TIRE, AND METHOD FOR PRODUCING RUBBER PRODUCT

Provided is a method for producing rubber particles with a reduced coagulation tendency. The present invention relates to a method for producing rubber particles with a reduced coagulation tendency, the method including a step of performing protein synthesis in the presence of both rubber particles and a cell-free protein synthesis solution containing an mRNA coding for a rubber elongation factor (REF) family protein to bind the REF family protein to the rubber particles. 1. A method for producing rubber particles with a reduced coagulation tendency , the method comprisinga step of performing protein synthesis in the presence of both rubber particles and a cell-free protein synthesis solution containing an mRNA coding for a rubber elongation factor (REF) family protein to bind the REF family protein to the rubber particles.2. The method for producing rubber particles with a reduced coagulation tendency according to claim 1 ,{'i': 'Hevea brasiliensis.', 'wherein the REF family protein is derived from'}3. The method for producing rubber particles with a reduced coagulation tendency according to claim 1 ,wherein the cell-free protein synthesis solution contains a germ extract.4. The method for producing rubber particles with a reduced coagulation tendency according to claim 3 ,wherein the germ extract is derived from wheat.5. The method for producing rubber particles with a reduced coagulation tendency according to claim 1 ,wherein the rubber particles are present in the cell-free protein synthesis solution at a concentration of 5 to 50 g/L.6. A method for producing a pneumatic tire claim 1 , the method comprising the steps of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'synthesizing rubber from the rubber particles obtained by the method according to ;'}kneading the rubber with an additive to obtain a kneaded mixture;building a green tire from the kneaded mixture; andvulcanizing the green tire.7. A method for producing a rubber product claim 1 , the method ...

FLUORINE RUBBER COMPOSITION, CROSSLINKED RUBBER MOLDED BODY AND METHOD FOR PRODUCING SAME

Provided are: a fluorine rubber composition which contains a hydrogen atom-containing fluorine rubber and a hydrogen atom-containing fluororesin; a crosslinked rubber molded body which uses this fluorine rubber composition; and a method for producing this crosslinked rubber molded body. It is preferable that the hydrogen atom-containing fluororesin is composed of at least one compound that is selected from the group consisting of polyvinylidene fluorides, vinylidene fluoride-hexafluoropropylene copolymers, tetrafluoroethylene-ethylene copolymers and vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene copolymers. 1. A fluorine rubber composition comprising a hydrogen atom-containing fluorine rubber and a hydrogen atom-containing fluororesin.2. The fluorine rubber composition according to claim 1 , wherein a content of said hydrogen atom-containing fluororesin is 1 to 50 parts by weight relative to 100 parts by weight of said hydrogen atom-containing fluorine rubber.3. The fluorine rubber composition according to claim 1 , wherein the fluorine rubber composition further comprises an organic peroxide and a co-crosslinking agent.4. The fluorine rubber composition according to claim 1 , wherein said hydrogen atom-containing fluororesin is at least one compound selected from the group consisting of polyvinylidene fluoride claim 1 , a vinylidene fluoride-hexafluoropropylene copolymer claim 1 , a tetrafluoroethylene-ethylene copolymer and a vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene copolymer.5. The fluorine rubber composition according to claim 1 , wherein the fluorine rubber composition contains no inorganic filler.6. A crosslinked rubber molded body comprising a crosslinked product of the fluorine rubber composition according to .7. The crosslinked rubber molded body according to claim 6 , wherein the crosslinked rubber molded body is a sealing material for semiconductor manufacturing devices.8. A method for producing a crosslinked rubber molded ...

COMPOSITIONS PREPARED USING AN IONIC CROSSLINKING AGENT AND METHODS OF MAKING THE SAME

Disclosed herein are compositions comprising an ionic crosslinking agent (e.g., compositions comprising crosslinked products prepared by ionically crosslinking a polymer derived from styrene and optionally butadiene using an ionic crosslinking agent). The present disclosure also relates to methods of making the disclosed compositions. The compositions disclosed herein can be used in a variety of applications including, but not limited to, asphalt compositions, paints, coatings, carpet compositions, paper binding and coating compositions, foams, or adhesives. 1. A composition comprising:a crosslinked product prepared by ionically crosslinking a polymer derived from styrene and optionally butadiene using an ionic crosslinking agent.2. The composition according to claim 1 , wherein the polymer is polystyrene.3. The composition according to claim 1 , wherein the polymer is derived from styrene and butadiene.4. The composition according to claim 3 , wherein the polymer is a carboxylated styrene-butadiene copolymer.5. The composition according to claim 3 , wherein the polymer is a non-carboxylated styrene-butadiene copolymer.6. The composition according to claim 1 , wherein the polymer is further derived from glycidyl methacrylate or N-methylolacrylamide.7. The composition according to claim 1 , wherein the ionic cross-linking agent has a valency of at least 2.8. The composition according to claim 1 , wherein the ionic cross-linking agent has a valency of at least 3.9. The composition according to claim 1 , wherein the ionic crosslinking agent includes zirconium.10. The composition according to claim 1 , wherein the crosslinked product is free of sulfur.11. A paint claim 1 , a paper binding or paper coating composition claim 1 , an adhesive claim 1 , a foam claim 1 , a powder claim 1 , or a carpet composition comprising the composition according to .12. An asphalt composition comprising the composition according to .13. The asphalt composition according to claim 12 , ...

Gelatin particles, method for producing gelatin particles, gelatin particle-containing cell, and method for producing gelatin particle-containing cell

Disclosed herein are gelatin particles including gelatin, wherein when a major-axis length of dried gelatin particles is defined as a and a major-axis length of gelatin particles after swelling treatment obtained by immersing the dried gelatin particles in water at 40° C. under an atmospheric pressure for 60 minutes is defined as b, swelling degree represented by b/a is 1.0 or more but 10.0 or less, and wherein the gelatin particles after swelling treatment have a particle diameter of 1.0 nm or more but 5.0 μm or less. The gelatin particles are easily taken up by cells themselves.

REACTIVE SILICA IN EPOXIDIZED POLYBUTADIENER

A rubber composition that is based upon a cross-linkable elastomer composition comprising, per 100 parts by weight of rubber (phr) between 70 phr and 100 phr of an epoxidized rubber component selected from an epoxidized polybutadiene rubber (eBR), an epoxidized styrene-butadiene rubber (eSBR), or combinations thereof, wherein the epoxidized rubber component has a Tg of between −80° C. and −110° C. and an epoxy-function content of between 1 mol % and 25 mol %; between 30 phr and 150 phr of a plasticizing resin; and a quickly reactive silica that provides a macro dispersion Z-value of at least 50 in a defined rubber composition; and a non-silol coupling agent. 2. The rubber composition of claim 1 , wherein the quickly reactive silica that provides a macro dispersion Z-value of at least 60.3. The rubber composition of claim 2 , wherein the quickly reactive silica that provides a macro dispersion Z-value of at least 654. The rubber composition of claim 1 , wherein the coupling agent is selected from bis-(triethoxysilylpropyl) tetrasulfide claim 1 , bis-(triethoxysilylpropyl) disulfide or combinations thereof.5. The rubber composition of claim 1 , wherein the epoxidized rubber component is the eBR.6. The rubber composition of claim 1 , wherein the epoxidized rubber component is the eSBR.7. The rubber composition of claim 1 , wherein the quickly reactive silica has a BET surface area of between 140 m/g and 180 m/g as determined by ASTM 5604.8. The rubber composition of claim 1 , wherein the rubber composition comprises between 40 phr and 180 phr of the quickly reactive silica.9. The rubber composition of claim 1 , wherein the rubber composition includes less than 15 phr of carbon black.10. The rubber composition of claim 1 , wherein the plasticizing resin is an efficient plasticizing resin such that when included in a mixture consisting of the epoxidized rubber component and 67 phr of the efficient plasticizing resin claim 1 , causes a Tg of the mixture to be at least 14° ...

Polymer foam and preparation method thereof

The present disclosure relates to a polymer foam and a preparation method thereof. The polymer foam is obtained by physically foaming a thermoplastic elastomer or a polyolefin material, and has an apparent density of 0.30 g/cm3 or less and a rebound degree of 50% or more as measured according to ASTM D2632.

METHOD FOR PHYSICALLY FOAMING A POLYMER MATERIAL AND FOAMED ARTICLE

The present disclosure relates to a method for physically foaming a polymer material and a foamed article. The method for physically foaming a polymer material comprises: (1) making a thermoplastic elastomer or a polyolefin material into a blank with an injector, an extruder, or a molding press; (2) subjecting the polyolefin blank to a crosslinking reaction to obtain a crosslinked polyolefin blank; (3) subjecting the thermoplastic elastomer blank or the crosslinked polyolefin blank to a high pressure impregnation with a supercritical fluid in an autoclave, then releasing the pressure to a normal pressure to obtain a supercritical fluid-impregnated blank; and (4) placing the supercritical fluid-impregnated blank into an end-product mold to perform an 1:1 in-mold foaming to obtain a finished foam article. 1. A method for physically foaming a polymer material , comprising:(1) making a thermoplastic elastomer or a polyolefin material into a thermoplastic elastomer blank or a polyolefin blank with an injector, an extruder, or a molding press;(2) subjecting the polyolefin blank to a crosslinking reaction to obtain a crosslinked polyolefin blank;(3) subjecting the thermoplastic elastomer blank or the crosslinked polyolefin blank to a high pressure impregnation with a supercritical fluid at a pressure of 10-50 MPa in an autoclave, then releasing the pressure to a normal pressure to obtain a supercritical fluid-impregnated blank; and(4) placing the supercritical fluid-impregnated blank into an end-product mold to perform an 1:1 in-mold foaming to obtain a finished foam article.2. The method according to claim 1 , wherein claim 1 , the thermoplastic elastomer comprises at least one of a thermoplastic polyurethane (TPU) claim 1 , a thermoplastic polyester elastomer (TPEE) claim 1 , and a polyether block amide elastomer (Pebax) claim 1 , or a mixture thereof.3. The method according to claim 1 , wherein claim 1 , the polyolefin material comprises at least one of poly(ethylene-co ...

CROSSLINKED POLYVINYL MATRIX FOR WATER TREATMENT

Cross-linked polyvinyl polymers comprising charged groups and methods of making are disclosed. The polymers are effective and durable adsorbent of dyes from aqueous solutions. Also, a method of removal of dyes from contaminated water is disclosed. 2. The cross linked polyvinyl polymer of claim 1 , wherein the vinyl compound of formula I is at least one selected from the group consisting of vinylphosphonic acid (VPA) claim 1 , and vinylsulfonic acid.3. The cross linked polyvinyl polymer of claim 1 , wherein the vinyl compound of formula I is VPA.4. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is at least one selected from the group consisting of bis[2-(methyacryloyloxy)ethyl] phosphate (BMEP) and bis[2-(methyacryloyloxy)ethyl] sulfate.5. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is BMEP.6. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is present in the crosslinked polyvinyl polymer in an amount in the range of 10 mole % to 50 mole % based on the total molar amount of the vinyl compound of formula I and the cross-linking compound of formula II.7. The cross linked polyvinyl polymer of claim 1 , wherein the cross linking compound of formula II is present in the crosslinked polyvinyl polymer in an amount of about 40 mol. % based on the total molar amount of the vinyl compound of formula I and the cross-linking compound of formula II.8. The cross linked polyvinyl polymer of claim 1 , wherein the vinyl compound of formula I is VPA and the cross linking compound of formula II is BMEP.9. The cross linked polyvinyl polymer of claim 8 , wherein the cross linking compound of BMEP is present in the crosslinked polyvinyl polymer in an amount in the range of 10 mole % to 50 mol. % of the total molar amount of VPA and BMEP.10. The cross linked polyvinyl polymer of claim 8 , wherein the cross linking compound of BMEP is present ...

SUBTERRANEAN FLUIDS CONTAINING SUSPENDED POLYMER BODIES

An aqueous suspension of polymer bodies is made by coalescing polymer from a flowing aqueous solution. These suspended bodies may be fibrous in appearance. However, the coalescence of the polymer bodies may be controlled to produce shapes. The coalesced polymer bodies are used for treating a downhole location within or accessed by a borehole. The bodies may be formed by coalescence at the surface and then pumped downhole or may be formed by coalescence downhole. Coalescence of polymer may result from crosslinking, complexing with material of opposite charge, or change in the polymer solution temperature, pH, solute concentration or solvent. The coalesced polymer bodies are maintained in aqueous solution after coalescence, and are not removed from solution for strengthening. 1. A method of treating a downhole location within or accessed by a borehole , the method comprising:coalescing polymer from a flowing aqueous polymer solution to generate an aqueous suspension of coalesced bodies of polymer, andproviding the aqueous suspension of coalesced bodies at the downhole location.2. The method according to claim 1 , wherein the coalesced polymer bodies are formed by coalescence of polymer at the surface and the aqueous suspension of bodies of polymer is delivered through at least one pump into the borehole claim 1 , wherein the pump is configured to convey the aqueous suspension of bodies of polymer downhole.3. The method according to claim 1 , wherein the aqueous polymer solution is delivered through at least one pump into the borehole and the coalesced polymer bodies of polymer are formed by coalescence of the polymer underground.4. The method according to claim 1 , wherein the coalescing the polymer is brought about by crosslinking polymer molecules to form the coalesced polymer bodies in the aqueous suspension of bodies of polymer.5. The method according to claim 1 , wherein the polymer comprises an ionic charge and the coalescing the polymer is brought about by ...

BIOCOMPATIBLE HYDROGEL CAPSULES AND PROCESS FOR PREPARING SAME

Described herein are compositions and methods for preparing hydrogel capsules using a cross-linking solution comprising a process additive. The process additive improves the quality of the resulting hydrogel capsules, such as increasing the number of defect-free capsules. 117-. (canceled)18. A process for preparing a hydrogel capsule composition from a polymer solution which comprises at least one afibrotic hydrogel-forming polymer and optionally an unmodified hydrogel-forming polymer , the process comprising contacting a plurality of droplets of the polymer solution with an aqueous cross-linking solution for a period of time sufficient to produce hydrogel capsules , wherein the cross-linking solution comprises a cross-linking agent , a buffer , an osmolarity-adjusting agent and a process additive , wherein the process additive is an amphiphilic compound.19. The process of claim 18 , wherein the polymer solution further comprises a cell suspension comprising a plurality of cells.20. The process of claim 19 , wherein the process additive reduces the surface tension of the cross-linking solution by about 1% claim 19 , about 2% claim 19 , about 5% claim 19 , about 10% claim 19 , about 15% claim 19 , about 20% claim 19 , about 25% claim 19 , about 30% claim 19 , about 35% claim 19 , about 40% claim 19 , about 45% claim 19 , about 50% claim 19 , or more.21. The process of claim 19 , wherein at least 95% of the hydrogel capsules in the hydrogel capsule composition are spherical capsules.22. The process of claim 19 , wherein the process additive is a surfactant or a non-ionic surfactant claim 19 , and the process additive is present in the cross-linking solution at a concentration of 0.001% to about 0.1% claim 19 , about 0.005% to about 0.05% claim 19 , about 0.005% to about 0.01% claim 19 , or about 0.01% to about 0.05%.23. The process of claim 22 , wherein the process additive is a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) triblock ...

LIQUID COMPOSITION FOR A WATERPROOFING MEMBRANE

The invention relates to a liquid bi-component composition comprising a silylated polymer having alkoxysilane functions, an epoxy resin, an amine catalyst for the epoxy and a catalyst for silanol condensation, and an adhesion promoter or a coupling agent. After crosslinking, the liquid composition according to the invention makes it possible to obtain a waterproofing membrane suitable for pedestrian and/or vehicle traffic. 3. The liquid composition as claimed in claim 1 , wherein the catalyst (A2-1) comprises at least one phenolic ring substituted by at least two —(CH)—N(CH)functions claim 1 , these two —(CH)—N(CH)functions preferably being in the ortho position to the OH group.5. The liquid composition as claimed in claim 1 , wherein the catalyst (A2-2) different from the catalyst (A2-1) is chosen from the aromatic compounds comprising at least one hydroxyl function or at least one —(CH)—N(CH)function.7. The liquid composition as claimed in claim 1 , wherein the catalyst (A2) comprises a mixture of 2 claim 1 ,4 claim 1 ,6-tri(dimethylaminomethyl)phenol as catalyst (A2-1) and of dimethylbenzylamine as catalyst (A2-2).9. The liquid composition as claimed in claim 1 , wherein the epoxy resin (B1) is derived from diglycidyl ether claim 1 , preferably a derivative of bisphenol A diglycidyl ether.10. The liquid composition as claimed in claim 1 , wherein the coupling agent (A3) is a bifunctional compound comprising at least one first function capable of reacting with the silylated polymer (A1) and one second function capable of reacting with the epoxy resin (B1).11. A ready-to-use kit comprising the liquid composition as claimed in claim 1 , the compositions A and B being packaged in two separate compartments.12. The use of the liquid composition as claimed in claim 1 , or of the kit as claimed in for the formation of a waterproofing membrane.13. A waterproofing membrane obtained by crosslinking the liquid composition as claimed in .14. A process for waterproofing a ...

CROSSLINKING MATERIALS FROM BIORENEWABLE ACONITIC ACID

A process includes forming a bio-derived crosslinking material from biorenewable aconitic acid. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups. 120.-. (canceled)21. A process comprising forming a tri-alcohol compound from an aconitic acid compound. This application is a continuation application of and claims priority from U.S. patent application Ser. No. 15/470,279, filed Mar. 27, 2017.Polydimethylsiloxane (PDMS) is among the most widely used silicon-based polymers, and the most widely used organic silicon-based polymer. PDMS materials have a wide range of applications including contact lenses, medical devices, soft lithography processes, shampoos, caulking, and lubricants (among other alternatives). One reason for the wide-ranging applications for PDMS materials is the variety of ways in which the properties of PDMS may be controlled through polymer crosslinking. By employing PDMS and small organic molecules with different organic functional groups, many possibilities exist for different PDMS materials to be crosslinked in different ways.According to an embodiment, a process of forming a bio-derived crosslinking material from biorenewable aconitic acid is disclosed. The process includes initiating a chemical reaction to form a bio-derived crosslinking material that includes multiple functional groups. The chemical reaction includes converting each carboxylic acid group of a biorenewable aconitic acid molecule to one of the multiple functional groups.According to another embodiment, a process of forming a crosslinked polymeric material is disclosed. The process includes utilizing a material derived from a biorenewable aconitic acid molecule as a bio-derived crosslinking material to form the crosslinked polymeric material. ...

PROCESSES FOR FORMING VULCANIZABLE ELASTOMERIC FORMULATIONS AND VULCANIZED ELASTOMERIC ARTICLES

Processes for forming a vulcanizable elastomeric formulation are disclosed. The processes include the steps of mixing an elastomer with a vulcanizing agent to form a vulcanizable elastomeric formulation that includes the vulcanizing agent dispersed in the elastomeric compound, wherein the vulcanizing agent includes a cyclododecasulfur compound. A process for forming a vulcanized elastomeric article is also described. 1. A process for forming a vulcanized elastomeric article , said process comprising (a) mixing an elastomer with a vulcanizing agent to form a vulcanizable elastomeric formulation that includes said vulcanizing agent dispersed in said elastomer; (b) forming the vulcanizable elastomeric formulation into a formed shape; and (c) vulcanizing the formed shape to form said vulcanized elastomeric article; wherein at least one of said mixing and forming steps comprises increasing the bulk average processing temperature of said vulcanizable elastomeric formulation to greater than 125° C. for at least a portion of said step.2. The process of claim 1 , wherein at least one of said mixing and forming steps comprises increasing the bulk average processing temperature of said vulcanizable elastomeric formulation to greater than 128° C. for at least a portion of said step.3. The process of claim 1 , wherein at least one of said mixing and forming steps comprises increasing the bulk average processing temperature of said vulcanizable elastomeric formulation to greater than 130° C. for at least a portion of said step.4. The process of claim 14 , wherein at least one of said mixing and forming steps comprises increasing the bulk average processing temperature of said vulcanizable elastomeric formulation to greater than 135° C. for at least a portion of said step.5. The process of claim 1 , wherein the vulcanizing agent comprises a cyclododecasulfur compound characterized by a DSC melt point onset of from about 155° C. to about 167° C. when measured at a DSC heat rate of ...

PARTIALLY-CROSSLINKED POLYETHYLENE FORMULATIONS AND METHODS OF MAKING SAME

Embodiments of polyethylene formulations comprise a partially cross-linked multimodal polyethylene composition having a the first molecular weight ethylene-based polymer component and a second molecular weight ethylene-based polymer component, wherein the partially cross-linked multimodal polyethylene composition comprises a density from 0.930 g/cc to 0.943 g/cc measured according to ASTM D792, a melt index (I) from 0.01 g/10 min to 5 g/10 min, when measured according to ASTM D1238 at 190° C. and a 2.16 kg load, a molecular weight distribution (MWD) from 5 to 10, wherein MWD is defined as Mw/Mn with Mw being a weight average molecular weight and Mn being a number average molecular weight, and a complex viscosity ratio from 250 to 450, wherein the complex viscosity ratio is defined as the complex viscosity at a shear rate of 0.01 rad/s divided by the complex viscosity at a shear rate of at a shear rate of 100 rad/s. 1. A polyethylene formulation comprising a partially cross-linked multimodal polyethylene composition having a first molecular weight ethylene-based polymer component and a second molecular weight ethylene-based polymer component , wherein the partially cross-linked multimodal polyethylene composition comprises:a density from 0.930 g/cc to 0.943 g/cc measured according to ASTM D792;{'sub': '2', 'a melt index (I) from 0.01 g/10 min to 5 g/10 min, when measured according to ASTM D1238 at 190° C. and a 2.16 kg load;'}{'sub': w', 'n', 'w', 'n, 'a molecular weight distribution (MWD) from 5 to 10, wherein MWD is defined as M/Mwith Mbeing a weight average molecular weight and Mbeing a number average molecular weight; and'}a complex viscosity ratio from 250 to 450, wherein the complex viscosity ratio is defined as the complex viscosity at a shear rate of 0.01 rad/s divided by the complex viscosity at a shear rate of at a shear rate of 100 rad/s.2. The polyethylene formulation of claim 1 , wherein the partially cross-linked multimodal polyethylene composition has ...

Absorbent cores having material free areas

An absorbent core, for use in an absorbent article, including a core wrap enclosing an absorbent material and including superabsorbent polymer particles. The core wrap includes a top side and a bottom side, and the absorbent core includes one or more area(s) substantially free of absorbent material through which the top side of the core wrap is attached to the bottom side of the core wrap, so that when the absorbent material swells the core wrap forms one or more channel(s) along the area(s) substantially free of absorbent material. The superabsorbent polymer particles have a time to reach an uptake of 20 g/g (T20) of less than 240 s as measured according to the K(t) test method.

Yeast strains and methods for producing collagen

Strains of yeast genetically engineered to produce increased amounts of non-hydroxylated collagen or hydroxylated collagen are described. An all-in-one vector including the DNA necessary to produce collagen, promotors, and hydroxylating enzymes is also described. Methods for producing non-hydroxylated or hydroxylated collagen are also provided.

COMPOSITION AND METHOD OF MAKING SHAPE MEMORY POLYMER FOR BIOMEDICAL APPLICATIONS

Shape memory polymers (SMP) based on poly vinyl alcohol (PVA) in the presence of 2-carboxyethyl acrylate oligomers (CEA), multi-wall carbon nanotubes (MWCNTs) and cross linked by ionizing radiation were investigated. Chemical crosslinking by glutaraldehyde for PVA in the presence of CEA and MWCNTs was also studied. Radiation cross linked SMP exhibits good temperature responsive shape memory behavior as demonstrated by thermal properties of radiation investigated by dynamic mechanical analysis. Transition temperature at Tan δ of radiation cross linked SMP decreased significantly by 6 and 13° C. due to addition of MWCNTs. The developed SMP exhibited promising shape memory behavior of radiation cross linked SMP for biomedical applications between temperatures range of Tan δ. Results on the gel fraction revealed significant reduction in swelling and increase in gelation due to chemical cross linking with glutaraldehyde. The radiation cross linked SMP reached 100% gelation at an irradiation dose of 50 kGy. 1. A method of making a shape memory polymer , comprising:mixing a poly vinyl alcohol solution and a 2-carboxyethyl acrylate oligomer at a specific ratio to make solution 1;adding a carbon nano tube having a specific measurement dispersed in a specific concentration with a sodium dodecyl sulfate surfactant to the solution 1 to make solution 2; andirradiating the solution 2 using a gamma ray source in the range of 5-100 kGy to make the shape memory polymer.2. The method of making the shape memory polymer of claim 1 , further comprising:mixing a chemical crosslinking agent to solution 2 before irradiation at a certain concentration.3. The method of making the shape memory polymer of claim 2 , wherein the chemical crosslinking agent is glutaraldehyde.4. The method of making the shape memory polymer of claim 2 , wherein the certain concentration is 4 ml (25%) crosslinking agent was added to 100 ml aqueous PVA solution.5. The method of making the shape memory polymer of ...

CROSSLINKABLE VINYLIDENE FLUORIDE AND TRIFLUOROETHYLENE POLYMERS

The present invention pertains to semi-crystalline fluoropolymer [polymer (F)] comprising: —recurring units derived from vinylidene fluoride (VDF); —from 10% to 50% by moles [with respect to the total moles of recurring units of polymer (F)] of recurring units derived from trifluoroethylene (TrFE); and—from 0.01% to 10% by moles [with respect to the total moles of recurring units of polymer (F)] of recurring units derived from at least one monomer comprising an azide group [monomer (Az)], to a process for its manufacture, to a crosslinkable composition comprising the same, to a process for crosslinking the same and to a method for manufacturing one of electrical and electronic devices using the same. 1. A semi-crystalline fluoropolymer (F) comprising:recurring units derived from vinylidene fluoride (VDF);from 10% to 50% by moles with respect to the total moles of recurring units of fluoropolymer (F) of recurring units derived from trifluoroethylene (TrFE); andfrom 0.01% to 10% by moles with respect to the total moles of recurring units of fluoropolymer (F) of recurring units derived from at least one monomer (Az) comprising an azide group.2. The fluoropolymer (F) of claim 1 , wherein monomer (Az) is selected from monomers of formula (I):{'br': None, 'sub': 1', '2', 'p', 'f', '2', 'n', 'q', 's', '3, 'CXX═CX—(O)—R—(CH)[S(O)]N\u2003\u2003(I)'}{'sub': 1', '2', 'f, 'wherein: X, Xand X, equal to or different from each other, are independently H or F, p is 0 or 1, n is 0 to 4, s is 0 or 1, q is 1 or 2, Ris a divalent (hydro)fluorocarbon group, optionally interrupted by one or more ethereal oxygen atoms.'}3. The fluoropolymer (F) of claim 2 , wherein the monomer (Az) is selected from monomers of formula (II):{'br': None, 'sub': 1', '2', 'f', '2', 'n', 'q', 's', '3, 'CXX═CX—O—R—(CH)—[S(O)]N\u2003\u2003formula (II)'}{'sub': i', '2', 'f, 'wherein: X, Xand X, equal to or different from each other, are independently H or F, n is 0 to 4, s is 0 or 1, q is 1 or 2, Ris a divalent ( ...

Structured nanoporous materials, manufacture of structured nanoporous materials and applications of structured nanoporous materials

A method is disclosed for manufacturing a structured polymeric material. In the method, a body is provided comprising a substantially homogenous precursor polymeric material. An interference pattern of electromagnetic radiation is set up within the body to form a partially cross-linked polymeric material, the interference pattern comprising maxima and minima of intensity of the electromagnetic radiation, the interference pattern thereby causing spatially differential cross linking of the precursor polymeric material to form crosslinked regions having relatively high cross linking density and non-crosslinked regions having relatively low cross linking density, the crosslinked regions and non-crosslinked regions corresponding to the maxima and minima of intensity of the electromagnetic radiation, respectively. The partially cross-linked polymeric material is then contacted with a solvent to cause expansion and crazing of at least some of the non-crosslinked regions to form a structured polymeric material containing pores. 132-. (canceled)33. A polymeric structure having a plurality of lamellae , adjacent lamellae being spaced apart by an intervening spacing layer wherein the spacing layer comprises an array of spacing elements integrally formed with and extending between the adjacent lamellae , the spacing layer having interconnected porosity extending within the spacing layer.34. The polymeric structure according to wherein the lamellae are substantially non-porous.35. The polymeric structure according to and having a first region and a second region claim 33 , adjacent the first region claim 33 , wherein the first region differs from the second region in that the first region is a nanoporous material having the plurality of lamellae claim 33 , adjacent lamellae being spaced apart by the intervening spacing layer.36. The polymeric structure according to and having a first region and a second region claim 33 , each having the plurality of lamellae claim 33 , adjacent ...

Epoxidised natural rubber based blend for antistatic footwear application

Electrically conductive vulcanised epoxidised natural rubber [ENR]-carbon black blends can be produced by using either internal mechanical mixing method or open milling method. These two methods are commercially friendly due to their practicability and high production rate. The addition of vulcanisation system, either sulfur or peroxide type does not affect the electrical properties of the vulcanised blends. All vulcanized blends prepared in this innovation show useful electrical properties with electrical volume resistances as low as the order of 10 1 ohms. All these vulcanised blends also exhibit good mechanical properties with tensile strengths up to 26.0 MPa and Dunlop rebound resiliencies of 14.0% (i.e. high damping property). The black colour level of all these vulcanised blends is adjustable. As a result of good electrical and mechanical properties (especially high damping property), they have good potential to be used for antistatic footwear manufacturing and application.

SUPER ABSORBENT POLYMER AND METHOD FOR PREPARING THE SAME

The present invention relates to a super absorbent polymer and a method for preparing the same. The present invention has features that it is possible to prepare a super absorbent resin that can have an improved centrifuge retention capacity (CRC) and a high absorbency under load (AUL) by controlling the shape and size of the chopper die holes during coarse pulverization of a hydrous gel phase polymer. 1. A super absorbent polymer comprising a crosslinked polymer , the crosslinked polymer being obtained by surface-crosslinking a base polymer prepared by polymerizing a water-soluble ethylene-based unsaturated monomer including an acidic group in which at least a part of the acidic group is neutralized , wherein the super absorbent polymer hasa centrifuge retention capacity (CRC) of more than 20 g/g,an absorbency under 0.9 psi load (AUL) of more than 18 g/g, and {'br': None, 'ARUL=0.3AUL(5 min)/0.3AUL(60 min)\u2003\u2003[Equation 1]'}, 'ARUL shown in the following Equation 1 of 60% to 85%in Equation 1, {'br': None, 'i': Wb', 'Wa, '0.3AUL(g/g)=[(g)−(g)]/weight(g) of the absorbent polymer\u2003\u2003[Equation 2]'}, '0.3AUL (5 min) and 0.3AUL (60 min) are the values of absorbency under load (AUL) at 5 minutes and 60 minutes shown in the following Equation 2, respectively,'}in Equation 2,Wa(g) is the sum of the weight of the absorbent polymer and the weight of the device capable of providing a load for the absorbent polymer, andWb(g) is the sum of the weight of the absorbent polymer in which moisture is absorbed after supplying water for the absorbent polymer under a load (0.3 psi) for 5 minutes or 60 minutes, and the weight of the device capable of providing a load for the absorbent polymer.2. The super absorbent polymer according to wherein {'br': None, 'sub': '1', 'sup': '1', 'R-COOM\u2003\u2003[Chemical Formula 1]'}, 'the water-soluble ethylene-based unsaturated monomer is a compound represented by the following Chemical Formula 1in Chemical Formula 1,{'sub': 1', '1', ...

EPOXIDISED NATURAL RUBBER-BASED BLEND WITH REVERSIBLE ELECTRICAL BEHAVIOUR

Epoxidised natural rubber [ENR] based vulcanised-blends with two different types of electrical conductive filler (i.e. conductive grade-carbon black and intrinsically electrical conductive polymer) may be produced respectively by using either internal mechanical mixing method or open milling method or the combination of the two methods. All these ENR based vulcanised-blends show high consistent reversible electrical behaviour under the tensile straining process. They also exhibit useful mechanical properties with tensile strengths up to 28.0 MPa, elongations at break up to 800.0% and Dunlop rebound resiliencies up to 55.0%. The lower the rebound resilience, the better the damping property and shock absorption ability for the ENR based vulcanised-blends. As a result, these ENR based vulcanised-blends are ideal to be used for manufacturing flexible sensors that may correspond to the tensile straining process. 1. An epoxidised natural rubber (ENR) based vulcanised blend for flexible sensor manufacturing or application comprising; ENR , electrically conductive fillers and vulcanisation agents.2. The ENR based blend according to claim 1 , wherein the blend composition ranges from;50.0 to 99.0 p.p.h.r. of ENR;1.0 to 50.0 p.p.h.r. of electrically conductive fillers;0.1 to 10.0 p.p.h.r. of vulcanisation agent with a purity level up to 100.0 wt %.3. The ENR based blend according to claim 1 , wherein the blend selectively comprising:0 to 10.0 p.p.h.r. of vulcanisation accelerators with a purity level up to 100.0 wt %;0 to 12.5 p.p.h.r. of vulcanisation activators with a purity level up to 100.0 wt %;0 to 20.0 p.p.h.r. of vulcanisation coagents with a purity level up to 100.0 wt %;0 to 20.0 p.p.h.r. of antioxidants with a purity level up to 100.0 wt %;0 to 20.0 p.p.h.r. of processing waxes;0 to 100.0 p.p.h.r. of dispersing agents; and0 to 35.0 p.p.h.r. of colouring agents with a purity level up to 100.0 wt %.4. The ENR based blend according to claim 1 , wherein the blend ...

Crosslinkable polymeric compositions with diallyl isocyanurate crosslinking coagents, methods for making the same, and articles made therefrom

Crosslinkable polymeric compositions comprising an ethylene-based polymer, an organic peroxide, and a diallyl isocyanurate crosslinking coagent. Such crosslinkable polymeric compositions and their crosslinked forms can be employed as polymeric layers in wire and cable applications, such as insulation in power cables.

METHOD FOR PRODUCING MODIFIED POLYMER, AND RUBBER COMPOSITION

Acido-basic properties of a system containing a polymer obtained by decomposing by oxidative cleavage of a carbon-carbon double bond, and a trifunctional molecule having an alkoxysilyl group in the structure as represented by the formula (A) are changed such that the system is changed into a basic system when the system is acidic and the system is changed into an acidic system when the system is basic to combine the decomposed polymer and the trifunctional molecule, thereby introducing the alkoxysilyl group into the main chain. Furthermore, acido-basic properties of a system containing a polymer obtained by decomposing by oxidative cleavage of a carbon-carbon double bond to decrease the molecular weight, and a functional molecule having an alkoxysilyl group as represented by the formula (a) are changed in the same manner as above to combine the decomposed polymer and the functional molecule, thereby introducing the alkoxysilyl group in a molecular terminal. 1. A method for producing a modified polymer , comprising changing acido-basic properties of a system containing a polymer obtained by decomposing a polymer having a carbon-carbon double bond in a main chain by oxidative cleavage of the carbon-carbon double bond to decrease the molecular weight , and a functional molecule having an alkoxysilyl group in the structure such that the system is changed into a basic system when the system is acidic and the system is changed into an acidic system when the system is basic to combine the decomposed polymer and the functional molecule , thereby obtaining a modified polymer having an alkoxysilyl group introduced in a main chain or at least one molecular terminal.4. The method for producing a modified polymer according to claim 2 , wherein the trifunctional molecule having the alkoxysilyl group in the structure as represented by the formula (A) is obtained by oxidative cleavage of a carbon-carbon double bond in the trifunctional molecule having at least one vinyl group.8. ...

ENCAPSULATION BY CROSS-LINKING OF ANIONIC POLYMERS BY PH INDUCED DISSOCIATION OF CATION-CHELATE COMPLEXES

Microencapsulation methods are provided using encapsulant, fiber or film forming compositions of a cross-linkable anionic polymer, a multivalent cation salt, a chelating agent, and a volatile base. During the formation of this composition, the generally acidic chelating agent is titrated with a volatile base to an elevated pH to improve ion-binding capability. Multivalent cations are sequestered in cation-chelate complexes. Cross-linkable polymers in this solution will remain freely dissolved until some disruption of equilibrium induces the release of the free multivalent cations from the cation-chelate complex. Vaporization of the volatile base drops the pH of the solution causing the cation-chelate complexes to dissociate and liberate multivalent cations that associate with the anionic polymer to form a cross-linked matrix. During spray-drying, the formation of a wet particle, polymer cross-linking, and particle drying occur nearly simultaneously. 1. A method of cross-linking polymer molecules , the method comprising:(a) providing a solution of an acidic chelating agent with a volatile base;(b) adding at least one source of multivalent cations to form cation-chelate complexes in the solution;(c) mixing molecules of at least one anionic polymer with the solution of cation-chelate complexes and volatile base; and(d) vaporizing the volatile base of the solution, thereby disassociating the cation-chelate complexes and releasing multivalent cations and cross-linking the polymer molecules with said multivalent cations.2. The method of claim 1 , said acidic chelating agent solution further comprising a weak acid buffer.3. The method of claim 2 , wherein said weak acid is an acid selected from the group consisting of benzoic acid claim 2 , lactic acid claim 2 , ascorbic acid claim 2 , adipic acid claim 2 , acrylic acid claim 2 , glutaric acid claim 2 , ascorbic acid claim 2 , gallic acid claim 2 , caffeic acid claim 2 , L-Tartaric acid claim 2 , D-Tartaric acid claim 2 , ...

MODIFIED CONJUGATED DIENE POLYMER AND METHOD FOR PRODUCING SAME, POLYMER COMPOSITION, CROSSLINKED POLYMER, AND TIRE

The invention provides a rubber composition which can improve low fuel consumption performance, workability, and abrasion resistance at the same time in uses of automobile tires and the like. A modified conjugated diene polymer is produced by a method comprising: a polymerization step of polymerizing a conjugated diene compound or polymerizing a conjugated diene compound and an aromatic vinyl compound to obtain a conjugated diene polymer having an active end in the presence of a metal amide compound obtained by mixing an alkali metal compound or an alkaline earth metal compound with a secondary amine compound and a first modification step of reacting the active end with a compound (C1) having a functional group (a) that interacts with silica, having one or more linear structures where three or more groups or atoms in total derived from at least either of a methylene group and a divalent atom are linearly connected, and capable of binding to a plurality of the active ends. 1. A method for producing a modified conjugated diene polymer , comprising:a polymerization step of polymerizing a conjugated diene compound or polymerizing a conjugated diene compound and an aromatic vinyl compound to obtain a conjugated diene polymer having an active end, in the presence of a metal amide compound obtained by mixing an alkali metal compound or an alkaline earth metal compound with a secondary amine compound anda first modification step of reacting the active end with the following compound (C1):(C1) a compound having a functional group (a) that interacts with silica, having one or more linear structures where three or more groups or atoms in total derived from at least either of a methylene group and a divalent atom are linearly connected, and capable of binding to a plurality of the active ends.2. The method for producing a modified conjugated diene polymer according to claim 1 , wherein (C1) is the following compound (C1′):(C1′) a compound having a functional group (a) that ...

Transparent And Tough Rubber Composition And Manufacturing Process For The Same

In order to provide a rubber composition having high transparency and toughness, the present invention can provide a crosslinked rubber composition, being substantially free of silica, comprising a first olefin polymer having refractive index of between 1.500 to 1.525 at 23 degree C.; and a second olefin polymer which is different from the first olefin polymer, wherein the composition has haze of 20% or less on 2 mm thick sheet, measured according to JIS K7136, and wherein the composition has Type A Durometer hardness (0 sec) of 35 or more, measured according to JIS K6253.

SUPER ABSORBENT POLYMER AND METHOD FOR PRODUCING SAME

The present invention relates to an olefin polymer and a method for producing the same. The super absorbent polymer can exhibit excellent absorbent properties even in a swollen state and thus exhibit excellent anti-rewetting effects. Accordingly, when the super absorbent polymer is used, it is possible to provide a sanitary material such as a diaper or a sanitary napkin which can give a smooth touch feeling even after the body fluid is discharged. 2. The super absorbent polymer of claim 1 , wherein it has a centrifuge retention capacity for a physiological saline solution of 30 to 40 g/g.3. The super absorbent polymer of claim 1 , wherein it has an absorbency under load under 0.9 psi for a physiological saline solution of 19 to 25 g/g.4. The super absorbent polymer of claim 1 , wherein it has a free swell gel bed permeability for a physiological saline solution of about 50 darcy to about 100 darcy.7. The method for producing a super absorbent polymer of claim 6 , wherein the epoxy-based surface crosslinking agent include at least one polyglycidyl ether selected from the group consisting of ethylene glycol diglycidyl ether claim 6 , propylene glycol diglycidyl ether claim 6 , butanediol diglycidyl ether claim 6 , hexanediol diglycidyl ether claim 6 , diethylene glycol diglycidyl ether claim 6 , triethylene glycol diglycidyl ether claim 6 , polyethylene glycol diglycidyl ether claim 6 , dipropylene glycol diglycidyl ether claim 6 , tripropylene glycol diglycidyl ether claim 6 , polypropylene glycol diglycidyl ether claim 6 , and glycerol triglycidyl ether.8. The method for producing a super absorbent polymer of claim 6 , wherein claim 6 , in the step of forming the surface crosslinked layer claim 6 , the surface of the base polymer powder is subjected to a first surface crosslinking at a temperature of 120 to 160° C. for 5 to 40 minutes using an epoxy-based surface crosslinking agent.9. The method for producing a super absorbent polymer of claim 6 , wherein the non- ...

Super Absorbent Polymer And Method For Producing Same

The super absorbent polymer comprises: a base polymer powder including a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface crosslinked layer formed on the base polymer powder and including a second crosslinked polymer in which the first crosslinked polymer is further crosslinked via a surface crosslinking agent, wherein the super absorbent polymer has: a fixed height absorption (FHA) of 22.5 g/g to 29 g/g, a saline flow conductivity (SFC) of 35(·10cm·s/g) or more, and T-20 of 180 seconds or less. 1. A super absorbent polymer comprising:a base polymer powder including a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; anda surface crosslinked layer formed on the base polymer powder and including a second crosslinked polymer in which the first crosslinked polymer is further crosslinked via a surface crosslinking agent,wherein the super absorbent polymer has the following features:a fixed height absorption (FHA) (20 cm) for a physiological saline solution (0.9 wt % aqueous sodium chloride solution) of 22.5 g/g to 29 g/g,{'sup': −7', '3, 'a saline flow conductivity (SFC) for a physiological saline solution (0.685 wt % aqueous sodium chloride solution) of 35(·10cm·s/g) or more, and'}T-20 of 180 seconds or less which indicates the time required for absorbing 1 g of the super absorbent polymer to 20 g of aqueous solution of 0.9 wt % sodium chloride and 0.01 wt % alcohol ethoxylate having 12 to 14 carbon atoms under pressure of 0.3 psi.2. The super absorbent polymer according to claim 1 , wherein the super absorbent polymer has a centrifuge retention capacity (CRC) for a physiological saline solution (0.9 wt % aqueous sodium chloride solution) for 30 minutes of 26 g/g to 34 g/g.3. The super absorbent polymer according to claim 1 , wherein the super absorbent polymer has a free swell rate (FSR) of 0 ...