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Применить Всего найдено 3665. Отображено 100.
16-07-1997 дата публикации

УСТРОЙСТВО ТЕРМИЧЕСКОЙ ОБРАБОТКИ ГИПСОВОГО СЫРЬЯ ВО ВРАЩАЮЩЕЙСЯ ПЕЧИ ОБЖИГА ИЗВЕСТИ

Номер: RU0000004530U1
Автор: Глушаков Борис Артемович, Саможенков Владимир Михайлович, Храмов Валентин Александрович, Шаповал Евгений Михайлович
Принадлежит: Глушаков Борис Артемович, Саможенков Владимир Михайлович, Храмов Валентин Александрович, Шаповал Евгений Михайлович

1. Устройство термической обработки гипсового сырья во вращающейся печи обжига извести, состоящее из форсунки сжигания топлива, камеры сгорания, камеры смешения топочных газов с воздухом и вращающейся печи, пространства которых соединены между собой, отличающееся тем, что форсунка сжигания топлива, камера сгорания и камера смешения топочных газов с воздухом расположены в пространстве вращающейся печи до окон выгрузки термически обработанного материала в рекуператор, который является трубопроводом подачи воздуха в камеру смешения топочных газов. 2. Устройство по п.1, отличающееся тем, что форсунка сжигания топлива смонтирована с возможностью осевого перемещения и может занимать положение как до окон выгрузки, так и после окон. (19) RU (11) (13) 4 530 U1 (51) МПК C04B 11/036 (1995.01) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К СВИДЕТЕЛЬСТВУ (21), (22) Заявка: 96110685/20, 10.06.1996 (46) Опубликовано: 16.07.1997 (71) Заявитель(и): Храмов Валентин Александрович, Глушаков Борис Артемович, Саможенков Владимир Михайлович, Шаповал Евгений Михайлович U 1 4 5 3 0 R U (57) Формула полезной модели 1. Устройство термической обработки гипсового сырья во вращающейся печи обжига извести, состоящее из форсунки сжигания топлива, камеры сгорания, камеры смешения топочных газов с воздухом и вращающейся печи, пространства которых соединены между собой, отличающееся тем, что форсунка сжигания топлива, камера сгорания и камера смешения топочных газов с воздухом расположены в пространстве вращающейся печи до окон выгрузки термически обработанного материала в рекуператор, который является трубопроводом подачи воздуха в камеру смешения топочных газов. 2. Устройство по п.1, отличающееся тем, что форсунка сжигания топлива смонтирована с возможностью осевого перемещения и может занимать положение как до окон выгрузки, так и после окон. Ñòðàíèöà: 1 U 1 (54) УСТРОЙСТВО ТЕРМИЧЕСКОЙ ОБРАБОТКИ ГИПСОВОГО СЫРЬЯ ВО ВРАЩАЮЩЕЙСЯ ПЕЧИ ОБЖИГА ИЗВЕСТИ 4 5 3 0 (73) ...

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10-09-2006 дата публикации

УСТРОЙСТВО ОБЕСПЫЛИВАНИЯ ГИПСОВАРОЧНОГО КОТЛА

Номер: RU0000056378U1
Автор: Азаров Валерий Николаевич, Боглаев Василий Ильич, Гробов Алексей Борисович, Тетерев Максим Владимирович
Принадлежит: ООО "ПТБ ПСО Волгоградгражданстрой"

Устройство обеспыливания гипсоварочного котла, содержащее гипсоварочный котел непрерывного действия, пылеосадительное оборудование и вентилятор для отвода очищенных газов, отличающееся тем, что пылеосадительное оборудование выполнено в виде последовательно соединенных разделителя-концентратора и вихревого инерционного пылеуловителя с двумя входами очищаемого газа, верхний осевой выход которого подключен к входу первого вентилятора, при этом входы вихревого инерционного пылеуловителя подключены к осевому выходу разделителя-концентратора, боковой тангенциальный выход которого подсоединен к входу второго вентилятора, осуществляющего подачу воздуха для аэрации в гипсоварочном котле. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 56 378 (13) U1 (51) МПК C04B 11/028 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ Адрес для переписки: 400087, г.Волгоград, ул. Новороссийская, 10, В.Н. Азарову (73) Патентообладатель(и): ООО "ПТБ ПСО Волгоградгражданстрой" (RU) (24) Дата начала отсчета срока действия патента: 09.12.2005 U 1 5 6 3 7 8 R U Ñòðàíèöà: 1 U 1 Формула полезной модели Устройство обеспыливания гипсоварочного котла, содержащее гипсоварочный котел непрерывного действия, пылеосадительное оборудование и вентилятор для отвода очищенных газов, отличающееся тем, что пылеосадительное оборудование выполнено в виде последовательно соединенных разделителя-концентратора и вихревого инерционного пылеуловителя с двумя входами очищаемого газа, верхний осевой выход которого подключен к входу первого вентилятора, при этом входы вихревого инерционного пылеуловителя подключены к осевому выходу разделителя-концентратора, боковой тангенциальный выход которого подсоединен к входу второго вентилятора, осуществляющего подачу воздуха для аэрации в гипсоварочном котле. 5 6 3 7 8 (54) УСТРОЙСТВО ОБЕСПЫЛИВАНИЯ ГИПСОВАРОЧНОГО КОТЛА R U (45) Опубликовано: 10.09.2006 (72) Автор(ы): Азаров Валерий Николаевич (RU), Боглаев Василий ...

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Номер записи: 2
20-10-2011 дата публикации

УСТАНОВКА ДЛЯ ПРОИЗВОДСТВА α-ГИПСА

Номер: RU0000109460U1
Автор: Бочавер Кирилл Зыськович, Сегеда Александр Владимирович
Принадлежит: Бочавер Кирилл Зыськович

1. Установка для производства α-гипса, состоящая из агрегатов измельчения сырья, реактора дегидрирования CaSO·2HO, фильтра и транспортера-осушителя, отличающаяся тем, что в качестве реактора-дегидратора, нагревателя, осушителя и охладителя используются спиральные транспортеры. 2. Установка по п.1, отличающаяся тем, что между реактором-нагревателем и дегидратором и спиральным транспортером-осушителем и охладителем продукта установлен фильтр для отвода парогазового потока из них. 3. Установка по п.1, отличающаяся тем, что в качестве пылегазового фильтра используется рукавный фильтр из нержавеющей сетки с обратной продувкой воздухом. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C04B 11/02 (13) 109 460 U1 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ (21)(22) Заявка: ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2011119227/03, 13.05.2011 (24) Дата начала отсчета срока действия патента: 13.05.2011 (72) Автор(ы): Бочавер Кирилл Зыськович (RU), Сегеда Александр Владимирович (RU) (45) Опубликовано: 20.10.2011 Бюл. № 29 1 0 9 4 6 0 R U Формула полезной модели 1. Установка для производства α-гипса, состоящая из агрегатов измельчения сырья, реактора дегидрирования CaSO4·2H2O, фильтра и транспортера-осушителя, отличающаяся тем, что в качестве реактора-дегидратора, нагревателя, осушителя и охладителя используются спиральные транспортеры. 2. Установка по п.1, отличающаяся тем, что между реактором-нагревателем и дегидратором и спиральным транспортером-осушителем и охладителем продукта установлен фильтр для отвода парогазового потока из них. 3. Установка по п.1, отличающаяся тем, что в качестве пылегазового фильтра используется рукавный фильтр из нержавеющей сетки с обратной продувкой воздухом. Стр.: 1 U 1 U 1 (54) УСТАНОВКА ДЛЯ ПРОИЗВОДСТВА α-ГИПСА 1 0 9 4 6 0 Адрес для переписки: 111250, Москва, ул. Красноказарменная, 3, кв.287, К.З. Бочаверу R U (73) Патентообладатель(и): Бочавер Кирилл Зыськович (RU) Приоритет(ы): (22) Дата подачи заявки: 13 ...

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10-05-2013 дата публикации

УСТРОЙСТВО ПРИГОТОВЛЕНИЯ МИНЕРАЛЬНЫХ СМЕСЕЙ

Номер: RU0000127744U1
Автор: Батуков Вадим Владимирович, Голубев Владимир Олегович, Горин Сергей Валентинович, Никольский Владимир Евгеньевич, Савин Андрей Валерьевич, Фриц Юрий Александрович
Принадлежит: Закрытое акционерное общество "Концерн "Струйные технологии", Общество с ограниченной ответственностью "Алтайский гипсовый комбинат"

1. Устройство приготовления минеральных смесей, содержащее дымосос, рукавный фильтр со сборным конвейером, бункер сырья, первый разветвитель, многостадийный циклонный холодильник, напорный вентилятор и накопительный бункер, причем входной патрубок дымососа соединен с выходом газовой фазы рукавного фильтра, под выходами твердой фазы которого установлен сборный конвейер, второй выход первого разветвителя соединен со входом твердой фазы многостадийного циклонного холодильника, и второй выход напорного вентилятора соединен со входом газовой фазы многостадийного циклонного холодильника, а выход твердой фазы многостадийного циклонного холодильника соединен течкой с накопительным бункером, отличающееся тем, что в него включены первый и второй циклоны грубой очистки, накопительный бункер осушенного сырья, второй разветвитель, мельница-сушилка, циклон-осадитель, аэрофонтанный подогреватель и аэрофонтанная печь кальцинации, причем вход пылегазовой смеси рукавного фильтра соединен трубопроводом с выходом газовой фазы второго циклона грубой очистки, вход пылегазовой смеси второго циклона грубой очистки соединен трубопроводом с выходом газовой фазы первого циклона грубой очистки, вход пылегазовой смеси первого циклона грубой очистки соединен трубопроводом с выходом газовой фазы мельницы-сушилки, сборный конвейер и выходы твердой фазы первого и второго циклонов грубой очистки течками соединены с накопителем осушенного сырья, выход накопителя сырья соединен течкой со входом твердой фазы мельницы-сушилки, вход газовой фазы которой соединен трубопроводом с выходом газовой фазы циклона-осадителя, вход пылегазовой смеси циклона-осадителя соединен трубопроводом с выходом аэрофонтанного подогревателя, вход твердой фазы которого соединен механическим питателем со вторым выходом второго разветвителя, причем первый выход второго разветвителя соединен течкой с накопительным бункером, а вход второго разветвителя соединен течкой с выходом накопителя осушенного сырья, вход пылегазовой смеси ...

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Номер записи: 4
20-09-2014 дата публикации

УСТРОЙСТВО ДЛЯ ПЕРЕРАБОТКИ ФОСФОГИПСА

Номер: RU0000145344U1
Автор: Ефимов Юрий Семенович, Ким Владимир, Костинец Александр Михайлович
Принадлежит: ООО "ГК Юнисхим"

Устройство для извлечения редкоземельных элементов при переработке фосфогипса, характеризующееся тем, что включает емкость для выщелачивания, оборудованную дренажным днищем и фильтрующей подложкой, связанную с по меньшей мере четырьмя последовательно установленными сорбционными колонками, заполненными катионитом, каждая из которых включает запорную арматуру в виде клапанов, выполненных с возможностью независимого циклического переключения работы каждой колонки с режима сорбции на режим десорбции. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 145 344 U1 (51) МПК C01F 17/00 (2006.01) C04B 11/26 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2014114440/05, 14.04.2014 (24) Дата начала отсчета срока действия патента: 14.04.2014 (73) Патентообладатель(и): ООО "ГК Юнисхим" (RU) (45) Опубликовано: 20.09.2014 Бюл. № 26 R U 1 4 5 3 4 4 Формула полезной модели Устройство для извлечения редкоземельных элементов при переработке фосфогипса, характеризующееся тем, что включает емкость для выщелачивания, оборудованную дренажным днищем и фильтрующей подложкой, связанную с по меньшей мере четырьмя последовательно установленными сорбционными колонками, заполненными катионитом, каждая из которых включает запорную арматуру в виде клапанов, выполненных с возможностью независимого циклического переключения работы каждой колонки с режима сорбции на режим десорбции. Стр.: 1 U 1 U 1 (54) УСТРОЙСТВО ДЛЯ ПЕРЕРАБОТКИ ФОСФОГИПСА 1 4 5 3 4 4 Адрес для переписки: 117647, Москва, ул. Профсоюзная, 111, корп. 1, кв. 259, Ким В. R U Приоритет(ы): (22) Дата подачи заявки: 14.04.2014 (72) Автор(ы): Ким Владимир (RU), Костинец Александр Михайлович (RU), Ефимов Юрий Семенович (RU) U 1 U 1 1 4 5 3 4 4 1 4 5 3 4 4 R U R U Стр.: 2 RU 5 10 15 20 25 30 35 40 45 145 344 U1 Область техники Полезная модель относится к технологии комплексной переработки фосфогипса и может быть использовано для утилизации отходов сернокислотного производства ...

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Номер записи: 5
27-03-2016 дата публикации

ЗАЗЕМЛИТЕЛЬ

Номер: RU0000160657U1
Автор: Алаев Евгений Георгиевич, Власов Илья Леонидович, Герасименко Андрей Сергеевич, Демин Юрий Васильевич, Иванов Геннадий Викторович, Ивашкин Сергей Владимирович, Плотников Дмитрий Николаевич, Скотников Дмитрий Сергеевич
Принадлежит: ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ БЮДЖЕТНОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ "СИБИРСКИЙ ГОСУДАРСТВЕННЫЙ УНИВЕРСИТЕТ ВОДНОГО ТРАНСПОРТА" (ФГБОУ ВО "СГУВТ")

Заземлитель, содержащий составную железобетонную опору, вертикально установленную своей нижней частью, выполненной из строительного бетона, в грунте, расположенную своей нижней поверхностью своей средней части на верхней поверхности нижней части составной железобетонной опоры и расположенную нижней поверхностью своей верхней части, выполненной из строительного бетона, на верхней поверхности средней части составной железобетонной опоры, отличающийся тем, что средняя часть составной железобетонной опоры выполнена из композиции при следующем соотношении компонентов, мас. %: РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК E04H 12/12 H01R 4/66 H02B 1/16 C04B 28/04 C04B 111/90 (13) 160 657 U1 (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2015112758/03, 07.04.2015 (24) Дата начала отсчета срока действия патента: 07.04.2015 (45) Опубликовано: 27.03.2016 Бюл. № 9 (73) Патентообладатель(и): ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ БЮДЖЕТНОЕ ОБРАЗОВАТЕЛЬНОЕ УЧРЕЖДЕНИЕ ВЫСШЕГО ОБРАЗОВАНИЯ "СИБИРСКИЙ ГОСУДАРСТВЕННЫЙ УНИВЕРСИТЕТ ВОДНОГО ТРАНСПОРТА" (ФГБОУ ВО "СГУВТ") (RU) 1 6 0 6 5 7 Адрес для переписки: 630099, г. Новосибирск, ул. Щетинкина, 33, СГУВТ R U Приоритет(ы): (22) Дата подачи заявки: 07.04.2015 (72) Автор(ы): Алаев Евгений Георгиевич (RU), Власов Илья Леонидович (RU), Герасименко Андрей Сергеевич (RU), Дёмин Юрий Васильевич (RU), Иванов Геннадий Викторович (RU), Ивашкин Сергей Владимирович (RU), Плотников Дмитрий Николаевич (RU), Скотников Дмитрий Сергеевич (RU) измельченный портландцемент крупностью 0,1- 0,2 мкм измельченный песок крупностью 0,1-0,2 мкм 18-26 9-13 песок 45-59 вода 10-20 R U 1 6 0 6 5 7 Формула полезной модели Заземлитель, содержащий составную железобетонную опору, вертикально установленную своей нижней частью, выполненной из строительного бетона, в грунте, расположенную своей нижней поверхностью своей средней части на верхней поверхности нижней части ...

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Номер записи: 6
29-05-2017 дата публикации

СТЕНОВАЯ ПАНЕЛЬ

Номер: RU0000171306U1
Автор: Лысков Владимир Михайлович, Репин Александр Анатольевич
Принадлежит: Лысков Владимир Михайлович, Репин Александр Анатольевич

Предложена стеновая панель, в которой стальная арматура диаметром 3-6 мм выполнена в виде плоских каркасов, установленных в параллельных плоскостях, перпендикулярных наибольшим внешним плоскостям панели, с шагом, равным 4-20 толщины стеновой панели, и по краям стеновой панели. В устройстве используется легкий бетон, состав которого содержит следующие компоненты, мас.%: полуводный гипс 62-72, портландцемент 18-25, отход целлюлозно-бумажного производства (скоп) (в пересчете на сухое вещество) 0,5-12, лигносульфонаты технические (в пересчете на сухое вещество) 0,15-1,5, сода кальцинированная 0,05-0,2, песок кварцевый - остальное до 100%, при водоцементном отношении 2,0-3,5. И 1 171306 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ ВУ” 174 306” 44 ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ИЗВЕЩЕНИЯ К ПАТЕНТУ НА ПОЛЕЗНУЮ МОДЕЛЬ ММ9К Досрочное прекращение действия патента из-за неуплаты в установленный срок пошлины за поддержание патента в силе Дата прекращения действия патента: 21.02.2021 Дата внесения записи в Государственный реестр: 22.10.2021 Дата публикации и номер бюллетеня: 22.10.2021 Бюл. №30 Стр.: 1 па ЭД ЕП

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Номер записи: 7
14-06-2012 дата публикации

Cementitious compositions

Номер: US20120145044A1
Автор: Peter Shelley Mills, Robert Benjamin Jewell, Robert F. Rathbone, Thomas L. Robl
Принадлежит: Minova International Ltd, UNIVERSITY OF KENTUCKY

The invention provides a cementitious composition comprising a cement component comprising (i) an accelerant, (ii) a calcium sulphate source and (iii) an ettringite forming cement; an aggregate; and optionally water; wherein the cement has a minimum unconfined compressive strength of 1500 psi when tested in accordance with ASTM C1140 and/or C1604 at 15 minutes after placement; methods for its use and concrete formed from it.

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Номер записи: 8
28-03-2013 дата публикации

POLYMERIC CONSTRUCTION MATERIAL ON THE BASIS OF FLOTATION WASTE FROM COPPER ORE FLOTATION AND WASTE SULFUR

Номер: US20130074738A1
Автор: Janiczek Andrzej, Myslowski Wlodzimierz
Принадлежит:

The method of production of polymeric construction material from flotation waste originating from copper ore flotation and waste sulfur is described. The method includes mixing of 20-50% by weight of waste sulfur which is combined with 10-50% by weight of flotation waste from flotation of copper ore and 3-25% by weight of waste phosphogypsum as pH regulator. Finally, 10-40% by weight of mineral filler is added. The mixing occurs at a temperature of 130-150 degrees Celsius and the mixing lasts for about 30 minutes with rotational speed of an agitator of 20 rpm. 1. The method of production of polymeric construction material from flotation waste originating from copper ore flotation and waste sulfur , said method comprisingmixing of 20-50% by weight of waste sulfur, 10-50% by weight of flotation waste from flotation of copper ore, 3-25% by weight of waste phosphogypsum as pH regulator, 10-40% by weight of mineral filler;wherein said mixing occurs at a temperature of 130-150 degrees Celsius and wherein said mixing lasts for about 30 minutes with rotational speed of an agitator of 20 rpm.2. The method of wherein said copper ore comprises copper ore having granulation of 0.06 mm.3. The method of wherein said polymeric construction material further comprises waste sulfur with metals contained in flotation waste from copper ore flotation claim 1 , wherein said metals include copper claim 1 , lead claim 1 , zinc claim 1 , nickel in the form of simple or mixed sulfides.4. The method of wherein said polymeric construction material further comprises amount of trace elements such as copper claim 3 , lead claim 3 , iron claim 3 , arsenic claim 3 , cadmium claim 3 , zinc claim 3 , nickel claim 3 , molybdenum claim 3 , vanadium claim 3 , cobalt.5. The method of production of polymeric construction material from flotation waste originating from copper ore flotation and waste sulfur claim 3 , said method comprisingmixing of 30% by weight of waste sulfur, 35% by weight of flotation ...

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Номер записи: 9
02-05-2013 дата публикации

Cementitious Compositions and Related Systems and Methods

Номер: US20130104778A1
Автор: Lisowski David A., Miglautsch John R.
Принадлежит: Reco Cement Products, LLC

Provided are cementitious compositions and related systems and methods. The cementitious compositions, or admixtures, according to the present invention generally comprise gypsum, a first alkaline component and glass. The admixture may further comprise fly ash, which is preferably obtained as a waste by-product from a coal-burning power plant. A method according to the present invention comprises an initial step of analyzing or receiving an analysis of a fly ash sample. Based at least in part on the analysis of the fly ash sample, a mix rate may be selected and an initial admixture can be formulated, which, when added to the fly ash sample, creates an alternative or additive to Portland cement for use in concrete, for example. 1. A method of forming a cementitious composition , said method comprising the steps of:determining an ash weight of a fly ash sample;selecting a mix strength of greater than or equal to 0.15 and less than or equal to 0.50;calculating an ash rate by subtracting said mix rate from 1.00;calculating a first intermediate factor by dividing said mix rate by said ash rate;calculating an admixture total weight by dividing said ash weight by said ash rate;calculating a mix weight by multiplying said total weight by said mix rate;calculating a rate adjustment factor by dividing a first ash factor less than one by the sum of one plus said intermediate factor;calculating a mix factor by subtracting said rate adjustment factor from said mix rate; andbased on said mix factor, selecting a first weight of gypsum, a second weight of a first alkaline component and a third weight of glass, wherein the sum of said first weight, said second weight, and said third weight equals said mix weight.2. A method according to claim 1 , wherein said first ash factor was formed by summing a first number and a second number claim 1 , whereinsaid first number is a measured percent by weight of calcium oxide contained in said sample of fly ash, andsaid second number is a ...

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Номер записи: 10
06-06-2013 дата публикации

CEMENT AND CONCRETE WITH REINFORCED MATERIAL

Номер: US20130139727A1
Автор: Chen Irvin, Constantz Brent R., Monteiro Paulo J.M., Self Kyle
Принадлежит:

Provided are compositions, methods and systems including cementitious compositions and reinforcing materials wherein the cementitious composition comprises a metastable component. 1. A composition comprising:a cementitious composition wherein the cementitious composition comprises a metastable component selected from the group consisting of vaterite, amorphous calcium carbonate, and combination thereof, anda reinforcing material.2. The composition of claim 1 , wherein the cementitious composition has a wet paste pH of less than 12.3. The composition of claim 1 , wherein the cementitious composition has a δC value less than −12.0‰.4. The composition of claim 1 , wherein the cementitious composition comprises at least 50 wt % vaterite.5. The composition of claim 1 , wherein the composition comprises more than 0.15% water-soluble chloride ion by weight of cement in the composition.6. The composition of claim 1 , wherein the reinforcing material does not exhibit changes in mechanical properties selected from the group consisting of elastic modulus claim 1 , tensile strength claim 1 , and yield strength claim 1 , when exposed to water soluble chloride repeatedly or for an extended period of time.7. The composition of claim 1 , wherein the reinforcing material is selected from the group consisting of aluminum claim 1 , glass fiber claim 1 , carbon fiber claim 1 , ceramics claim 1 , polymer claim 1 , grass claim 1 , grass product claim 1 , wood product claim 1 , and combination thereof.8. The composition of claim 1 , wherein the reinforcing material comprises stainless steel cladding treated rebar claim 1 , galvanized rebar claim 1 , stainless steel rebar claim 1 , fiber-reinforced plastic claim 1 , epoxy coated rebar claim 1 , titanium cladding treated rebar claim 1 , chrome plated/coated rebar claim 1 , nickel plated/coated rebar claim 1 , cobalt-chromium coated rebar claim 1 , or any combination thereof.9. The composition of claim 7 , wherein the reinforcing material ...

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Номер записи: 11
26-09-2013 дата публикации

SLURRIES AND METHODS OF MAKING LIGHT WEIGHT GYPSUM BOARD

Номер: US20130248078A1
Автор: LYNN Michael R., SONG Weixin D., YU Qiang
Принадлежит: UNITED STATES GYPSUM COMPANY

The invention generally provides gypsum-containing slurries including stucco, naphthalenesulfonate dispersant, and pregelatinized starch. The naphthalenesulfonate dispersant is present in an amount of about 0.1%-3.0% by weight based on the weight of dry stucco. The pregelatinized starch is present in an amount of at least about 0.5% by weight up to about 10% by weight of pregelatinized starch by weight based on the weight of dry stucco in the formulation. Other slurry additives can include trimetaphosphate salts, accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, gypsum wallboard, and a method of making gypsum wallboard. 130-. (canceled)31. A slurry comprising water , stucco , starch , and foaming agent;the starch is in an amount from about 0.5% to about 10% by weight based on the weight of the stucco;the foaming agent comprises a major weight portion of unstable component and a minor weight portion of stable component, the amount of foaming agent and the weight ratio of said unstable component to stable component effective to form a void distribution within a set gypsum composition formed from said slurry;when the slurry is cast and dried as a board comprising said set gypsum composition, the set gypsum composition comprises a continuous crystalline matrix substantially of calcium sulfate dihydrate, the board having a density of about 34 pcf or less and a core hardness of at least about 11 lb, the core hardness determined according to ASTM standard C473.32. The slurry of claim 31 , wherein the foaming agent comprises a blend of the unstable and stable components.33. The slurry of claim 31 , wherein the foaming agent comprises at least about 65% by weight of unstable component.34. The slurry of claim 31 , wherein the foaming agent is in an amount of about 0.1% or less by weight based on the weight of the stucco.35. The slurry of claim 31 , ...

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Номер записи: 12
17-10-2013 дата публикации

ULTRA-RAPID HARDENING HYDRAULIC BINDER USING REDUCED SLAG POWDER, AND METHOD OF PREPARING THE SAME

Номер: US20130269573A1
Автор: Heo Dong-Cheol, Kang Ki-Woong, Kim Chang-Hak, Kim Jin-man, Kwak Eun-Gu, Oh Sang-Yoon
Принадлежит: ECOMAISTER CO., LTD

Provided are an ultra-rapid hardening hydraulic binder including reduced slag powder and a method of preparing the same. The reduced slag powder is prepared by rapidly cooling molten electric arc furnace reduced slag, among by-products generated during an iron refinement process in a steel mill, to room temperature not to have free-calcium oxide by scattering the molten electric arc furnace reduced slag into the air using high-pressure gas by dropping the molten electric arc furnace reduced slag through a tundish. 1. An ultra-rapid hardening hydraulic binder comprising reduced slag powder ,wherein the reduced slag powder is prepared by rapidly cooling molten electric arc furnace reduced slag, among by-products generated during an iron refinement process in a steel mill, to room temperature not to have free-calcium oxide by scattering the molten electric arc furnace reduced slag into the air using high-pressure gas by dropping the molten electric arc furnace reduced slag through a tundish.2. The ultra-rapid hardening hydraulic binder according to claim 1 , wherein the reduced slag powder has a fineness of 3 claim 1 ,000 to 12 claim 1 ,000/g.3. The ultra-rapid hardening hydraulic binder according to claim 1 , wherein the ultra-rapid hardening hydraulic binder further comprises gypsum selected from the group consisting of anhydrous gypsum claim 1 , natural gypsum claim 1 , and hemihydrated gypsum to control reaction rate of rapid hardening.4. The ultra-rapid hardening hydraulic binder according to claim 1 ,wherein the reduced slag powder comprises 40 to 60% by weight of CaO, 5 to 15% by weight of SiO2, and 15 to 25% by weight of Al2O3 and does not have free-calcium oxide (free-CaO),wherein a content of alumina (Al2O3) of the reduced slag powder improving rapid hardening, early strengthening, corrosion resistance, and fire resistance is twice to seven times greater than that of ordinary Portland cement or ultra-rapid hardening cement, anda content of magnesia (MgO, ...

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Номер записи: 13
31-10-2013 дата публикации

DIMENSIONALLY STABLE GEOPOLYMER COMPOSITION AND METHOD

Номер: US20130284070A1
Автор: DUBEY Ashish
Принадлежит:

A method for making geopolymer cementitious binder compositions for cementitious products such as concrete, precast construction elements and panels, mortar, patching materials for road repairs and other repair materials, and the like is disclosed. The geopolymer cementitious compositions of some embodiments are made by mixing a synergistic mixture of thermally activated aluminosilicate mineral, calcium sulfoaluminate cement, a calcium sulfate and a chemical activator with water. 1. An aluminosilicate geopolymer composition comprising the reaction product of a thermally activated aluminosilicate mineral; a calcium sulfoaluminate cement; a calcium sulfate selected from the group consisting of calcium sulfate dihydrate , calcium sulfate hemihydrate , anhydrous calcium sulfate and mixtures thereof; a chemical activator selected from the group consisting of an alkali metal salt and an alkali metal base and mixtures thereof , and water.2. The aluminosilicate geopolymer composition of comprising the reaction product of about 33 to about 97% by weight of the thermally activated aluminosilicate mineral claim 1 , about 1 to about 40% by weight of the calcium sulfoaluminate cement claim 1 , about 1 to about 40% by weight of the calcium sulfate claim 1 , about 1.0 to about 6.0% by weight of the chemical activator selected from the group consisting of an alkali metal salt and an alkali metal base claim 1 , and water.3. The composition of claim 1 , wherein the chemical activator comprises an alkali metal citrate claim 1 , and the thermally activated aluminosilicate mineral comprises Class C fly ash.4. The composition of claim 1 , comprising a reaction product of amounts of the chemical activator and calcium sulfate relative to the amounts of the thermally activated aluminosilicate mineral and calcium sulfoaluminate cement effective to cause the reaction product to set in a predetermined time after mixing with water.5. The composition of claim 4 , wherein the amounts of the ...

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Номер записи: 14
26-12-2013 дата публикации

CEMENT CLINKER, METHOD OF MANUFACTURING THE SAME AND CEMENT COMPOSITION

Номер: US20130340652A1
Автор: CHABAYASHI Takashi, KATO Hiroyoshi, Kitayama Daihachi, Nagata Hiroshi, Nakamura Akinori
Принадлежит: TOKUYAMA CORPORATION

A cement clinker which can be sintered at 1,300 to 1,400° C. which is lower than the conventional sintering temperature and develops excellent strength characteristics such as mortar compression strength. 1. A cement clinker having a total content of tricalcium aluminate (3CaO.AlO:CA) and tetracalcium aluminoferrite (4CaO.AlO.FeO:CAF) calculated by Bogue's formulas of 22 mass % or more , a tricalcium silicate (3CaO.SiO:CS) calculated by Bogue's formula of 60 mass % or more and an iron modulus (I.M.) of 1.3 or less.2. The cement clinker according to which has a CAF content of 15 mass % or more.3. The cement clinker according to which has a total content of CS and dicalcium silicate (2CaO.SiO:CS) of 69 mass % or more.4. A cement composition comprising the cement clinker of and gypsum.5. The cement composition according to which further comprises at least one admixture selected from the group consisting of blast furnace slag claim 4 , siliceous admixture claim 4 , fly ash and limestone.6. A method of manufacturing a cement clinker claim 4 , comprising the steps of:{'sub': 3', '4', '3, "preparing raw materials to achieve a total content of CA and CAF calculated by Bogue's formulas of 22 mass % or more and a CS content calculated by Bogue's formula of 60 mass % or more and an iron modulus (I.M.) of 1.3 or less; and"}sintering the raw materials at 1,300 to 1,400° C.7. The cement clinker according to which has a total content of CS and dicalcium silicate (2CaO.SiO:CS) of 69 mass % or more.8. A cement composition comprising the cement clinker of and gypsum.9. A cement composition comprising the cement clinker of and gypsum.10. The cement composition according to which further comprises at least one admixture selected from the group consisting of blast furnace slag claim 8 , siliceous admixture claim 8 , fly ash and limestone.11. The cement composition according to which further comprises at least one admixture selected from the group consisting of blast furnace slag claim 9 ...

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Номер записи: 15
06-03-2014 дата публикации

SHRINKAGE-COMPENSATING CONCRETE

Номер: US20140060391A1
Автор: Rice Edward K.
Принадлежит:

A shrinkage compensating concrete does not require restraint. The expansive forces developed during hydration compensate for concrete shrinkage, obviating the need for any added internal or external restraint element. Using this new shrinkage compensating concrete, substantially crack-free slabs may be built without using restraining steel bars, fibers, or other separate restraining element. The shrinkage compensating concrete includes a cement that develops internal expansive forces that never exceed the tensile strength of the concrete, such that the internal expansion compensates for the concrete shrinkage. The expansive cement may be an ASTMS, M or S cement, or other expansive cements may also be used. 1. A shrinkage-compensating concrete material , comprising:a hydraulic cement;an expansive additive;aggregate;water; andsubstantially no internal restraint in the material.2. A shrinkage-compensating concrete structure , comprising:a hydraulic cement;an expansive additive;aggregate;water; andwith the structure having substantially no internal restraint.3. The concrete structure of wherein the structure comprises a slab.4. The concrete structure of wherein expansive forces developed during hydration compensate for concrete shrinkage claim 2 , obviating the need for internal or external restraint.5. The concrete structure of wherein the concrete develops internal expansive forces which at all times are lower than its tensile strength claim 2 , such that the internal expansion compensates concrete shrinkage claim 2 , resulting in a shrinkage-compensation without the need for reinforcement.6. The concrete structure of wherein the expansive cement is an ASTM Type K cement.7. The concrete structure of wherein the expansive additive comprises an expansive cement.8. The concrete structure of wherein the expansive cement comprises an oxide or sulfate that expands upon hydration.9. The concrete structure of wherein the expansive cement comprises calcium sulfoaluminate.10. ...

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Номер записи: 16
07-01-2021 дата публикации

METHOD OF PROCESSING PLASTERBOARDS

Номер: US20210002172A1
Автор: DAGGE Ludger, Kruspan Peter, LANGANKE Melanie, STEMMLER Konrad
Принадлежит:

A method of processing plasterboards or plasterboard for recover a calcium sulphate source for producing a hydraulic binder, includes comminuting plasterboards or a gypsum fraction thereof so as to obtain plasterboard particles and, thereafter, subjecting the plasterboard particles to a heat treatment at an elevated temperature so as to volatilize and/or decompose organic components present in the plasterboard particles. 1. A method of processing plasterboards for recovering a calcium sulphate source for producing a hydraulic binder , comprising the steps ofa) comminuting plasterboards or a gypsum fraction thereof so as to obtain plasterboard particles,b) subjecting the plasterboard particles to a heat treatment at an elevated temperature so as to volatilize and/or decompose organic components present in the plasterboard particles, wherein the heat treatment is carried out for a time period of less than 10 min.2. The method according to claim 1 , wherein the heat treatment comprises subjecting the plasterboard particles to a temperature in the range of 300° C. 550° C.3. The method according to claim 1 , wherein the heat treatment comprises subjecting the plasterboard particles or the gypsum fraction thereof to a temperature of 300° C.-390° C.4. The method according to claim 1 , wherein the heat treatment is carried out for a time period of 3-5 min.5. (canceled)6. The method according to claim 1 , wherein the heat treatment is carried out for a time period of ≥4 min.7. The method according to claim 1 , wherein claim 1 , before or after step a) claim 1 , a front and a back layer fraction is separated from a gypsum fraction of the plasterboard material.8. The method according to claim 1 , wherein step b) is carried out in an atmosphere that has an O-content of greater than 10 vol. %.9. A method comprising utilizing a calcium sulphate source obtained by a method according to as a component in the production of a hydraulic binder.10. The method according to claim 9 , ...

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Номер записи: 17
07-01-2016 дата публикации

LOWER HEAT PROCESSED CALCIUM SULPHATES FOR EARLY STRENGTH CEMENTS AND GENERAL USE

Номер: US20160002106A1
Автор: ÖZSÜT Mustafa
Принадлежит:

The Invention is related to increasing of early strength and final strengths of cements classified under EN and ASTM as Portland or CEM cements and also related to all clinker employing cements and to any kinds which employ calcium sulphates for set optimization and is for composing of new cements by only assessing new methods for production and is for composing of new cements by only assessing new methods to formation and inclusion of calcium sulphate resources which are used for set optimization. A new calcium sulphate resource is obtained by employing lower heats and this input is arranged to different dehydration levels at which they can be most efficient for the selected use. These different dehydration levels are called intermediate phases of dehydrate or hemihydrates or called as monohydrate. 1. As the prevailing method of inclusion of gypsum stones to the clinker at its grinding phase while it is cooling also , gypsum enters into a complex dehydration sequence where a preassumed ratio of it converts to hemihydrates and soluble anhydrites , it is cements that shall yield higher early and final strengths by inclusion of calcium sulphate resources which have a specific dehydration level and method and it consists of a new method of calcium sulphate inclusion to other cement components by inclusion of gypsum stones whom are dehydrated at planned rates by employing a specific heat level in range of 90-145° c. and inclusion at an optimum rate to clinker and other components as the sole or main calcium sulphate resource.2. As per claim 1 , it is dehydration of gypsum stones at lower heats compared to known gypsum calcinations (Dehydration) at 90° c.-120° c. and more efficiently at 105° c.-120° c. and to 135° c.-145° c. for more rapid processes and use these products which gain different characteristics than the known calcium sulphate resources as the main calcium sulphate resource in cements production.3. For obtaining the gypsums as per and claim 1 , instead of ...

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Номер записи: 18
08-01-2015 дата публикации

Chemical additive for gypsum products

Номер: US20150007753A1
Автор: Dongxiao Shao, Hao SONG, Huifen Li, Ke Zhang, Xiaotong Gao
Принадлежит: Saint Gobain Placo Sas

The present invention provides a gypsum composition, a gypsum board and their preparation method and the use of DHA as an anti-sagging additive in a gypsum product. Said gypsum board comprises set gypsum prepared from the composition; while said composition comprises gypsum, and an anti-deformation additive, wherein the anti-deformation additive comprises at least one selected from a group consisting of dehydroascorbic acid, dehydroascorbate and semidehydroascorbic acid. The set gypsum prepared from the said composition shows better anti-sagging or deformation resisting property. The gypsum product of the present invention is hardly distorted and has stronger stability even in the condition of high humidity, thus improve the quality of the gypsum product to meet the demands of the customer.

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Номер записи: 19
12-01-2017 дата публикации

Struvite-K and Syngenite Composition for Use in Building Materials

Номер: US20170008804A1
Автор: Anirban Ghosh, Gaurav V. Pattarkine, Gerald D. Boydston, Isaac K. Cherian, Nathan Frailey, Robert J. Hauber, Sergio Centurione, Séverine LAMBERET
Принадлежит: Certainteed Gypsum Inc

A composition and process for the manufacture thereof for use in a hybrid building material comprising at least in part Syngenite (K 2 Ca(SO 4 ) 2 .H 2 O) and Struvite-K (KMgPO 4 .6H 2 O). Specified constituents, including magnesium oxide (MgO), monopotassium phosphate (MKP) and stucco (calcium sulfate hemihydrate) are mixed in predetermined ratios and the reaction proceeds through multiple phases reactions which at times are proceeding simultaneously and in parallel and reaction may even compete with each other for reagents if the Struvite-K reaction is not buffered to slow down the reaction rate). A number of variable factors, such as water temperature, pH mixing times and rates, have been found to affect resultant reaction products. Preferred ratios of chemical constituents and manufacturing parameters, including predetermined and specified ratios of Struvite-K and Syngenite may be provided for specified purposes, optimized in respect of stoichiometry to reduce the combined heat of formation to non-destructive levels.

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Номер записи: 20
14-01-2016 дата публикации

SYSTEMS AND METHODS FOR AFFECTING A WALL REPAIR

Номер: US20160009595A1
Автор: Horton Walter, Quinn Chris, Quinn Reed
Принадлежит: FIBER FIX USA, LLC

A repair plaster powder for repairing drywall. The repair plaster powder includes gypsum plaster and crystalline silica. The repair plaster powder also includes calcium carbonate and calcium hydroxide. 1. A repair plaster powder for repairing drywall , the repair plaster powder comprising:gypsum plaster;crystalline silica;calcium carbonate; andcalcium hydroxide.2. The repair plaster powder of claim 1 , wherein the gypsum plaster is approximately 75 percent of the repair plaster powder by weight.3. The repair plaster powder of claim 1 , wherein the crystalline silica is approximately 10 percent of the repair plaster powder by weight.4. The repair plaster powder of claim 1 , wherein the calcium carbonate is approximately 10 percent of the repair plaster powder by weight.5. The repair plaster powder of claim 1 , wherein the calcium hydroxide is approximately 5 percent of the repair plaster powder by weight.6. The system of claim 1 , wherein the repair plaster powder further includes:kaolin.7. The repair plaster powder of claim 6 , wherein the kaolin is approximately 0.5 percent of the repair plaster powder by weight.8. The system of claim 1 , wherein the repair plaster powder further includes:hydroxypropyl methyl cellulose.9. The repair plaster powder of claim 6 , wherein the hydroxypropyl methyl cellulose is approximately 0.02 percent of the repair plaster powder by weight.10. The system of claim 1 , wherein the repair plaster powder further includes:ethylene vinyl acetate.11. The repair plaster powder of claim 6 , wherein the ethylene vinyl acetate is approximately 0.04 percent of the repair plaster powder by weight.12. The system of claim 1 , wherein the repair plaster powder further includes:carboxymethylcellulose.13. The repair plaster powder of claim 6 , wherein the carboxymethylcellulose is approximately 0.5 percent of the repair plaster powder by weight.14. The system of claim 1 , wherein the repair plaster powder further includes:stabilizing agents.15. A kit ...

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Номер записи: 21
15-01-2015 дата публикации

CONSTRUCTION MATERIAL CONTAINING MICROENCAPSULATED PHASE CHANGE MATERIAL, AND PREPARATION METHOD THEREOF

Номер: US20150017422A1
Автор: Lee Won-mok
Принадлежит:

Disclosed is a construction & engineering material containing a microencapsulated phase change material, wherein one or more components of construction & engineering materials are selected from a group of construction & engineering materials such as sand, cement, gravel, admixture, gypsum, aggregate, plaster, fiber, and magnesium, and the PCM microcapsules are attached to outer surfaces of the selected one or more components of construction & engineering materials. 1. Construction & engineering material containing microencapsulated phase change material , wherein one or more components of construction & engineering materials are selected from a group of construction & engineering materials such as sand , cement , gravel , admixture , additive , gypsum , aggregate , plaster , fiber , and magnesium , and the PCM microcapsules are attached to outer surfaces of the selected one or more components of construction & engineering materials.2. The construction & engineering material of claim 1 , wherein the PCM microcapsules are provided in a slurry state to be uniformly distributed and mixed with the construction & engineering materials and is put into a drying chamber operating in a temperature range of 30° C. to 500° C. to be dried.3. The construction & engineering material of claim 1 , wherein the PCM microcapsules are provided in a slurry state to be uniformly distributed and mixed with the construction & engineering materials claim 1 , is put into a drying chamber operating in a temperature range of 30° C. to 500° C. claim 1 , and is attached to the outer surfaces of the construction & engineering materials under a circulating condition.4. The construction & engineering material of claim 1 , wherein one or more components of the construction & engineering materials are selected from the group of the construction & engineering materials such as sand claim 1 , cement claim 1 , gravel claim 1 , admixture claim 1 , additive claim 1 , gypsum claim 1 , aggregate claim 1 , ...

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Номер записи: 22
17-01-2019 дата публикации

CALCINED GYPSUM TREATMENT DEVICE AND CALCINED GYPSUM TREATMENT METHOD

Номер: US20190016633A1
Автор: HAYASE Ken
Принадлежит: YOSHINO GYPSUM CO., LTD.

A calcined gypsum treatment apparatus has an agitating type of cooler provided with a cooling region for cooling the calcined gypsum, and a moisture supplying device for incorporating moisture into the calcined gypsum. The moisture supplying device includes a humid gas-feeding port which introduces humid gas including moisture or steam, directly into the cooling region. The calcined gypsum is introduced through a calcined gypsum introduction port into the cooling region, and the moisture is incorporated into the calcined gypsum to modify the calcined gypsum. The humid gas-feeding port is positioned in vicinity to the calcined gypsum introduction port so as to allow the spouted or delivered flow of the humid gas to be brought into contact with the calcined gypsum immediately after introduced into the cooling region. 1. A calcined gypsum treatment apparatus , which has a moisture supplying device for incorporating moisture into calcined gypsum and an agitating type of cooler provided with a cooling region for cooling the calcined gypsum;wherein said moisture supplying device includes a humid gas-feeding port which introduces a spouted flow or delivered flow of the humid gas, including moisture or steam, directly into the cooling region;wherein said cooler is provided with a calcined gypsum introduction port for introducing the calcined gypsum into said cooling region; andwherein said humid gas-feeding port is positioned in vicinity to said calcined gypsum introduction port so as to cause said spouted or delivered flow of the humid gas to be brought into contact with said calcined gypsum immediately after being introduced into said cooling region.2. The apparatus as defined in claim 1 , wherein said humid gas is a high temperature and high humidity gas produced in a calciner for calcination of said calcined gypsum and separated from the calcined gypsum; said cooler has a calcined gypsum supply device including the calcined gypsum introduction port; a calcined gypsum ...

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Номер записи: 23
26-01-2017 дата публикации

APPARATUS AND METHODS FOR PRODUCING GYPSUM WALLBOARD

Номер: US20170022104A1
Автор: DellAngelo Scott, Eversole Leslie, Lash Jason
Принадлежит:

An apparatus for production of a gypsum product is provided which comprises a conveyer comprising a conveyer belt and means for rotating the conveyer belt; means for forming a gypsum product; and at least one laser scanner positioned over the conveyer belt at the location where the scanner scans at least one edge of the gypsum product which is at least partially set; and the laser scanner is in communication with a processor. Methods for forming a gypsum product with the apparatus are provided as well. 1. An apparatus for production of a gypsum product , the apparatus comprising:a conveyer comprising a conveyer belt and means for rotating the conveyer belt;means for forming a gypsum product; andat least one laser scanner, wherein the laser scanner is positioned over the conveyer belt at the location where the scanner scans at least one edge of the gypsum product which is at least partially set; andwherein the laser scanner is in communication with a processor.2. The apparatus of claim 1 , wherein the laser scanner is a three-dimensional laser scanner.3. The apparatus of claim 1 , wherein the processor is equipped with a software which calculates an edge angle of the gypsum product and a deviation in the value of the edge angle from a pre-specified value for the edge angle.4. The apparatus of claim 3 , wherein the software produces at least one signal which is triggered by the deviation of higher than 2%.5. The apparatus of claim 4 , wherein the signal is a sound signal claim 4 , a visual signal claim 4 , or a combination of the two signals.6. The apparatus of claim 1 , wherein the means for forming a gypsum product comprise means for feeding a first sheet of paper on the conveyer belt claim 1 , a mixer and means for feeding a second sheet of paper on the conveyer belt.7. The apparatus of claim 1 , wherein the apparatus comprises two laser scanners; a first laser scanner positioned such that the first scanner can scan the left edge of the gypsum product as the gypsum ...

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Номер записи: 24
23-01-2020 дата публикации

PREGELATINIZED STARCH WITH MID-RANGE VISCOSITY, AND PRODUCT, SLURRY AND METHODS RELATED THERETO

Номер: US20200024190A1
Автор: SANG Yijun, SONG Weixin D.
Принадлежит: UNITED STATES GYPSUM COMPANY

Disclosed are product (e.g., panels), slurry, and methods relating to a pregelatinized starch having a mid-range viscosity (i.e., from about 20 centipoise to about 700 centipoise). 1. A board comprising:a set gypsum core disposed between two cover sheets, the core formed from a slurry comprising stucco, water and at least one pregelatinized starch, wherein the starch has a characteristic of a viscosity from about 35 centipoise to about 425 centipoise when the viscosity is measured while the starch is subjected to the conditions according to the VMA method,wherein the pregelatinized starch is in an amount from about 0.5% to about 5% by weight of the stucco,wherein the pregelatinized starch requires an increase in the amount of excess water needed to be added to the slurry to maintain the slurry fluidity at the same level it would be without the pregelatinized starch, that is less than the increase in the amount of excess water needed by a starch having a viscosity characteristic greater than 425 centipoise according to the VMA method, the board having a core hardness of at least about 11 lb, as determined according to ASTM C473.2. The board according to claim 1 , wherein the viscosity characteristic of the pregelatinized starch is from about 35 centipoise to about 200 centipoise according to the VMA method.3. The board according to claim 1 , wherein the water/stucco ratio is from about 0.55 to about 0.8.4. The board according to claim 1 , wherein the board has a density from about 24 pcf to about 35 pcf.5. The board according to claim 1 , wherein the slurry comprises a second type of starch that is (a) not gelatinized claim 1 , (b) is a pregelatinized starch having the characteristic of a viscosity below 35 centipoise according to the VMA method claim 1 , and/or (c) is a pregelatinized starch having the characteristic of viscosity above 425 centipoise according to the VMA method.6. The board according to wherein the second type of starch comprises alkylated starch.7. ...

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Номер записи: 25
23-01-2020 дата публикации

SILOXANE POLYMERIZATION IN GYPSUM WALLBOARD

Номер: US20200024191A1
Автор: HEMPHILL Mark K., Li Qinghua, RISCHE Trevor S.
Принадлежит: UNITED STATES GYPSUM COMPANY

A method of making a gypsum board including: preparing an aqueous slurry including a mixture of: calcium sulfate hemihydrate, water at a weight ratio of water to calcium sulfate hemihydrate of 0.2:1 to 1.2:1, and on a dry basis per 100 parts by weight (pbw) calcium sulfate hemihydrate: 0.2 to 2 pbw siloxane, 0.01 to 2 pbw siloxane polymerization catalyst including magnesium oxide and optionally fly ash, and 0.01 to 0.2 pbw triethanolamine (TEOA); allowing the siloxane to polymerize to polysiloxane; and depositing the slurry on a first cover sheet and covering the slurry with a second cover sheet to shape the slurry, and allowing the shaped slurry to set to form the gypsum board. Also, disclosed is the gypsum board resulting from the method. 1. A method of making a gypsum board comprising: calcium sulfate hemihydrate,', 'water at a weight ratio of water to calcium sulfate hemihydrate of 0.2:1 to 1.2:1, and', 0.2 to 2 pbw siloxane,', '0.01 to 2 pbw siloxane polymerization catalyst comprising magnesium oxide and optionally fly ash, and', '0.01 to 0.2 pbw triethanolamine (TEOA);, 'on a dry basis per 100 parts by weight (pbw) said calcium sulfate hemihydrate], 'preparing an aqueous slurry comprising a mixture ofallowing the siloxane to polymerize to polysiloxane; anddepositing the slurry on a first cover sheet and covering the slurry with a second cover sheet to shape the slurry, andallowing the shaped slurry to set to form the gypsum board.2. The method of claim 1 ,wherein the siloxane polymerization catalyst is mixed with the calcium sulfate hemihydrate,wherein the siloxane is mixed with a first portion of the water to be used to prepare the aqueous slurry to form a siloxane/water emulsion,wherein the siloxane/water emulsion is mixed with a second portion of the water used to prepare the aqueous slurry, andwherein the calcium sulfate hemihydrate/magnesium oxide mixture is mixed with the siloxane emulsion, the triethanolamine and a remainder of the water for the aqueous ...

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Номер записи: 26
24-04-2014 дата публикации

PREGELATINIZED STARCH WITH MID-RANGE VISCOSITY, AND PRODUCT, SLURRY AND METHODS RELATED THERETO

Номер: US20140113124A1
Автор: SANG Yijun, SONG Weixin D.
Принадлежит: UNITED STATES GYPSUM COMPANY

Disclosed are product (e.g., panels), slurry, and methods relating to a pregelatinized starch having a mid-range viscosity (i.e., from about 20 centipoise to about 700 centipoise). 1. Board comprising:a set gypsum core disposed between two cover sheets, the core formed from a slurry comprising stucco, water and at least one pregelatinized starch, wherein the starch has a characteristic of a viscosity from about 20 centipoise to about 700 centipoise when the viscosity is measured while the starch is subjected to the conditions according to the VMA method.2. Board according to claim 1 , wherein the viscosity characteristic of the starch is from about 30 centipoise to about 200 centipoise according to the VMA method.3. Board according to claim 1 , wherein the starch is effective to increase the core hardness of the set gypsum core relative to the set gypsum core without the starch.4. Board according to claim 1 , wherein the starch requires an increase in the amount of excess water needed to be added to the slurry to maintain the slurry fluidity at the same level it would be without the starch claim 1 , that is less than the increase in the amount of excess water needed by a starch having a viscosity characteristic greater than 700 centipoise (e.g. claim 1 , 773 centipoise) according to the VMA method.5. Board according to claim 1 , wherein the starch is in an amount from about 0.5% to about 3% by weight of the stucco.6. Board according to claim 1 , wherein the starch is acid-modified starch.7. Board according to claim 6 , wherein the acid-modified starch is acid-modified by sulfuric acid.8. Board according to claim 1 , wherein the water/stucco ratio is from about 0.55 to about 0.8.9. Board according to claim 1 , wherein the board has a density from about 24 pcf to about 35 pcf.10. Board according to claim 1 , wherein the slurry comprises a second type of starch that is (a) not gelatinized claim 1 , (b) is a pregelatinized starch having the characteristic of a viscosity ...

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Номер записи: 27
08-02-2018 дата публикации

APPARATUS AND METHOD FOR CALCINATION OF GYPSUM

Номер: US20180036697A1
Автор: ENDO Kazumi, NIIMI Katsumi, NITOH Kouji, TAKENAKA Takeshi
Принадлежит: YOSHINO GYPSUM CO., LTD.

An apparatus for calcination of gypsum includes a gypsum calciner having an interior wall surface with a circular or annular configuration as seen in its plan view, and a tubular combustor positioned at a center part of a body of the calciner. Raw gypsum is calcined or dehydrated by a high temperature gas spouting flow (Hg) ejected from a lower portion of the combustor. The calciner has a stationary-vane-type or movable-vane-type auxiliary device, which circumferentially energizes the raw gypsum in the vicinity of the interior wall surface toward a circumferential direction of the calciner. The auxiliary device has a plurality of stationary vanes circumferentially arranged in an outer peripheral zone of a lower portion of the combustor and spaced apart from each other at an angular interval, or an agitator extending through a conical or inner circumferential surface defined by the interior wall surface. 1. An apparatus for calcination of gypsum , which includes a gypsum calciner having an interior wall surface with a circular or annular horizontal cross-section or profile , and a tubular combustor located at a center part of the calciner and generating a high temperature gas , wherein a spouting flow of the high temperature gas is ejected to an interior area of the calciner through a high temperature gas outlet provided at a lower part of the combustor , so that raw gypsum fed to the interior area continuously or intermittently is calcined or dehydrated by the high temperature gas , and the calcined or dehydrated gypsum is discharged out of the calciner , comprising:an auxiliary device energizing the raw gypsum in vicinity of the interior wall surface toward a circumferential direction of said calciner, or augmenting a movement of the raw gypsum in the vicinity of the interior wall surface toward the circumferential direction,wherein the auxiliary device has a plurality of stationary vanes circumferentially arranged in an outer peripheral zone of said combustor and ...

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Номер записи: 28
08-02-2018 дата публикации

The usage of fly ash from flue gas desulfurization to make compositions for building

Номер: US20180037499A1
Автор: Chien-Fan Lien, Chin-Tien Lien
Принадлежит: Individual

Composition for building materials comprises of fly ash from flue gas desulfurization. The fly ash (βCaSO 4 anhydrite), obtained from circulating fluidized bed flue gas desulfurization, is mixed with binder reactants at a ratio of 9:1. It's mainly used for non-structural cement mortar, bricks for paving walkways, brick wall decors, fire-resistant walls for interior partitions, plasterboards and so on. The binder reactants compose of 70% CaSO 4 .½H 2 O, 10% Na 2 SO 4 , 10% CaO, 5% NaOH, 0˜5% cement and 0˜5% starch. When the binder reactants are mixed with fly ash and water (30% to 40% of the above total weight), the hydration process of CaSO 4 anhydrite is accelerated.

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Номер записи: 29
14-02-2019 дата публикации

Calcium Sulphate-Based Products

Номер: US20190047912A1
Автор: Fisher Robin
Принадлежит:

This invention relates to improved high temperature resistant calcium sulphate-based products e.g. gypsum wallboard products and, in particular, to products having reduced shrinkage at high temperatures. The invention provides calcium sulphate-based product comprising gypsum and a shrinkage resistance additive. The shrinkage resistance additive is melamine polyphosphate or melamine pyrophosphate. 121-. (canceled)22. A gypsum product in the form of a composite wallboard comprising:a first liner and a second liner; anda core sandwiched between the first liner and the second liner, the core comprising a set gypsum composition comprising gypsum and a shrinkage resistance additive, wherein the shrinkage resistance additive is melamine polyphosphate, melamine pyrophosphate or a combination thereof.23. The gypsum product according to claim 22 , wherein the shrinkage resistance additive is melamine polyphosphate.24. The gypsum product according to claim 22 , wherein the shrinkage resistance additive is melamine pyrophosphate.25. The gypsum product according to claim 22 , wherein the shrinkage resistance additive is present in the set gypsum composition in an amount from 0.1-20 wt %.26. The gypsum product according to claim 22 , wherein the shrinkage resistance additive is present in the set gypsum composition an amount from 1-10 wt %.27. The gypsum product according to claim 22 , wherein the shrinkage resistance additive is present in the set gypsum composition an amount from 1-5 wt %.28. The gypsum product according to claim 22 , wherein the shrinkage resistance additive is present in the set gypsum composition an amount from 2-5 wt %.29. The gypsum product according to claim 22 , wherein the core does not include inorganic fibers.30. The gypsum product according to claim 22 , wherein the core does not include glass fibers.31. The gypsum product according to claim 22 , made by a process comprising: forming an aqueous slurry comprising stucco and the shrinkage resistance ...

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Номер записи: 30
05-03-2015 дата публикации

Struvite-K and Syngenite Composition for Use in Building Materials

Номер: US20150059621A1
Автор: Boydston Gerald D., Centurione Sergio, Cherian Isaac K., Frailey Nathan, Ghosh Anirban, Hauber Robert J., Lamberet Severine, Pattarkine Gaurav V.
Принадлежит: CERTAINTEED GYPSUM, INC.

A composition and process for the manufacture thereof for use in a hybrid building material comprising at least in part Syngenite (KCa(SO).HO) and Struvite-K (KMgPO.6HO). Specified constituents, including magnesium oxide (MgO), monopotassium phosphate (MKP) and stucco (calcium sulfate hemihydrate) are mixed in predetermined ratios and the reaction proceeds through multiple phases reactions which at times are proceeding simultaneously and in parallel and reaction may even compete with each other for reagents if the Struvite-K reaction is not buffered to slow down the reaction rate). A number of variable factors, such as water temperature, pH mixing times and rates, have been found to affect resultant reaction products. Preferred ratios of chemical constituents and manufacturing parameters, including predetermined and specified ratios of Struvite-K and Syngenite may be provided for specified purposes, optimized in respect of stoichiometry to reduce the combined heat of formation to non-destructive levels. 3. The process for the continuous manufacture of a composition according to wherein the specified ranges of said predetermined solid constituent materials further comprise a ratio of the MgO to the KHPObetween 1:1.0 and 1:3.0.4. The process for the continuous manufacture of a composition according to wherein the specified ranges of said predetermined solid constituent materials further comprise a ratio of MgO to KHPObetween 1:1.9 and 1:2.2.5. The process for the continuous manufacture of a composition according to wherein the specified ranges of said predetermined constituent materials further comprises a defoamer.6. The process for the continuous manufacture of a composition according to wherein the specified ranges of said predetermined constituent materials further comprises a dispersant.7. The process for the continuous manufacture of a composition according to wherein the specified ranges of said predetermined constituent materials further comprises HSO.8. The ...

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Номер записи: 31
03-03-2016 дата публикации

GYPSUM WALLBOARD AND METHOD OF MAKING SAME

Номер: US20160060168A1
Автор: Bailey Joseph, Fey Karen, Miatudila Ma-ikay, Robertson Craig, Sethuraman Gopalakrishnan, Stav Eli
Принадлежит:

Compositions for gypsum board are disclosed, comprising a mixture of a gypsum slurry and a pre-generated foam and a coalescing agent. The coalescing agent comprises one or more coalescing agents that are added to the composition singly, separately or in combination to change the size and distribution of the air bubbles in the foamed gypsum slurry. The resulting gypsum cores have increased nail pull resistance and an improved facer/gypsum core bond. 1. A foamed gypsum slurry composition , comprising:stucco;gauging water;a foam comprising foaming water, a foaming agent and air;a first coalescing agent having a first cloud point temperature; anda second coalescing agent having a second cloud point temperature that is different from the first cloud point temperature;wherein the foamed gypsum slurry composition has a mix temperature, and the first and second coalescing agents have a blended cloud point temperature that is lower than the mix temperature.2. The foamed gypsum slurry composition of claim 1 , wherein the blended cloud point temperature is lower than the mix temperature by about 5° F. to about 30° F.3. The foamed gypsum slurry composition of claim 1 , wherein the blended cloud point temperature is lower than the mix temperature by about 5° F. to about 10° F.4. The foamed gypsum slurry of claim 1 , wherein the first coalescing agent has a cloud point temperature of about 68° F. claim 1 , and the second coalescing agent has a cloud point temperature of about 110° F.5. The foamed gypsum slurry of claim 1 , wherein the first or second coalescing agent is a polyether block copolymer surfactant.6. The foamed gypsum slurry of claim 5 , wherein the polyether block copolymer surfactant is an ethylene oxide-propylene oxide block copolymer and/or reverse block copolymer.7. The foamed gypsum slurry of claim 1 , wherein the first or second coalescing agent is an alkoxylated alcohol surfactant.8. The foamed gypsum slurry of claim 7 , wherein the alkoxylated alcohol ...

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Номер записи: 32
28-02-2019 дата публикации

Lightweight Gypsum Products Having Enhanced Water Resistance

Номер: US20190062216A1
Автор: Robin Daniel Fisher
Принадлежит: BPB Ltd

The product is produced from a settable aqueous calcium sulphate dispersion which has a water to solids ratio of less than 0.4 to 1, and has distributed therethrough lightweight hollow bodies having water-impervious surfaces (such as expanded polystyrene beads). The dispersion contains a hydratable cement (such as calcium sulpho aluminate) which is capable of hydration in the presence of the calcium sulphate dispersion. The hydratable cement is such that it reacts with excess water in the dispersion thereby enhancing the water resistance of the resulting product.

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Номер записи: 33
10-03-2016 дата публикации

COMPOSITIONS AND METHODS FOR REDUCING LIME BUCKING IN PLASTER PRODUCTS

Номер: US20160068434A1
Автор: EMAMI Samar, GRUSSING Jeffrey F., RISCHE Trevor S.
Принадлежит:

Methods of treating lime bucking in a plaster slurry are described. The method involves providing a slurry exhibiting lime bucking having a cone penetration of less than 10 mm at a consistency of 60 cc, comprising: water; calcium sulfate hemihydrate; and hydrated lime; and mixing an effective amount of a dispersant comprising a low intensity dispersant into the slurry so that the cone penetration increases and wherein the cone penetration is 10 mm or more at 10 minutes after addition of the dispersant at a consistency of 60 cc; and applying the plaster slurry containing the dispersant to a substrate. Veneer plaster dry component mixtures having reduced lime bucking when made into a slurry containing a low intensity dispersant, or hydrated lime coated with wax or a dibenzoate plasticizer are also described. 1. A method of treating lime bucking in a plaster slurry comprising: water;', 'calcium sulfate hemihydrate; and', 'hydrated lime;, 'providing a slurry exhibiting lime bucking having a cone penetration of less than 10 mm at a consistency of 60 cc, the slurry comprisingmixing an effective amount of a dispersant comprising a low intensity dispersant into the slurry so that the cone penetration increases and wherein the cone penetration is 10 mm or more at 10 minutes after addition of the dispersant at a consistency of 60 cc; andapplying the plaster slurry containing the dispersant to a substrate.2. The method of wherein the effective amount of the dispersant is in a range of about 0.05 wt % to about 0.6 wt % based on total weight of solids in the slurry.3. The method of wherein the dispersant is a polymethacrylate dispersant.4. The method of wherein the polymethacrylate dispersant has an anionic group attached to the polymethacrylate backbone.5. The method of wherein the polymethacrylate dispersant comprises a sodium polymethacrylate dispersant.6. The method of further comprising mixing the dispersant with accelerator before mixing the dispersant into the slurry.7. ...

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Номер записи: 34
11-03-2021 дата публикации

PROCESS TO MAKE CALCIUM OXIDE OR ORDINARY PORTLAND CEMENT FROM CALCIUM BEARING ROCKS AND MINERALS

Номер: US20210070656A1
Автор: Finke Cody E., LEANDRI Hugo F.
Принадлежит:

Aspects of the invention include a method of producing a cement material comprising step of: first reacting a calcium-bearing starting material with a first acid to produce an aqueous first calcium salt; second reacting the aqueous first calcium salt with a second acid to produce a solid second calcium salt; wherein the second acid is different from the first acid and the second calcium salt is different from the first calcium salt; and thermally treating the second calcium salt to produce a first cement material. Preferably, but not necessarily, during the second reacting step, reaction between the first calcium salt and the second acid regenerates the first acid. 1. A method of producing a cement material , the method comprising steps of:first reacting a calcium-bearing starting material with a first acid to produce an aqueous first calcium salt;second reacting the aqueous first calcium salt with a second acid to produce a solid second calcium salt; wherein the second acid is different from the first acid and the second calcium salt is different from the first calcium salt; andthermally treating one or more calcium salts to produce a first cement material.2. The method of claim 1 , wherein the one or more calcium salts comprises the second calcium salt.3. The method of claim 1 , wherein claim 1 , during the second reacting step claim 1 , reaction between the first calcium salt and the second acid regenerates the first acid.45-. (canceled)6. The method of comprising a first separating step after the first reacting step and before the second reacting step; the first separating step comprising separating a first aqueous fraction from a first solid fraction; wherein the first aqueous fraction comprises the aqueous first calcium salt and the first solid fraction comprises one or more solid byproducts formed during the first reacting step.78-. (canceled)9. The method of comprising a second acid regeneration step; wherein the second acid regeneration step comprises ...

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Номер записи: 35
05-06-2014 дата публикации

SURFACTANT-COATED HEMIHYDRATE GYPSUM AND PRODUCTION METHOD THEREOF

Номер: US20140150693A1
Автор: Hiranaka Shingo, KATO Hiroyoshi
Принадлежит: TOKUYAMA CORPORATION

Surfactant-coated hemihydrate gypsum which is coated with 0.01 to 1 part by weight of a surfactant based on 100 parts by weight of hemihydrate gypsum, wherein 1. Surfactant-coated hemihydrate gypsum which is coated with 0.01 to 1 part by weight of a surfactant based on 100 parts by weight of hemihydrate gypsum , whereinthe residual rate of the surfactant when the surfactant-coated hemihydrate gypsum is heated up to 300° C. is not less than 40 wt % of the amount of the surfactant before heating.2. The surfactant-coated hemihydrate gypsum according to claim 1 , wherein the coating amount of the surfactant is 0.1 to 0.6 part by weight based on 100 parts by weight of hemihydrate gypsum.3. The surfactant-coated hemihydrate gypsum according to claim 1 , wherein the surfactant is at least one selected from the group consisting of sulfates of a polyoxyalkylene claim 1 , alkali metal salts of a higher fatty acid claim 1 , fatty acid esters of glycerin and polyoxyalkylene-based nonionic surfactants.4. The surfactant-coated hemihydrate gypsum according to which has a cumulative pore volume of not more than 0.5 mL/g.5. A method of producing the surfactant-coated hemihydrate gypsum of claim 1 , comprising the step of heating a composition containing at least dihydrate gypsum and a surfactant at 110 to 200° C.6. The method according to claim 5 , wherein the dihydrate gypsum is at least one selected from the group consisting of natural gypsum claim 5 , flue-gas desulfurized gypsum and recovered dihydrate gypsum which has undergone a crystallization step.7. The surfactant-coated hemihydrate gypsum according to claim 2 , wherein the surfactant is at least one selected from the group consisting of sulfates of a polyoxyalkylene claim 2 , alkali metal salts of a higher fatty acid claim 2 , fatty acid esters of glycerin and polyoxyalkylene-based nonionic surfactants.8. The surfactant-coated hemihydrate gypsum according to which has a cumulative pore volume of not more than 0.5 mL/g. The ...

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Номер записи: 36
24-03-2022 дата публикации

Method of Mineral Recovery

Номер: US20220090231A1
Автор: DI CESARE Enrico
Принадлежит: St-Georges Eco-Mining Corp.

A process for the selective recovery of lithium values from feedstock is provided. The process includes concentration by one or more of air classification and flotation; selective leaching to remove Mg, Ca or Na formations; and leaching/sonication with an acid. Further, a method of beneficiating a lithium-containing ore is provided treating an aqueous pulp of the lithium-containing ore with a conditioning reagent; and floating, lithium values fraction of the lithium-containing ore from gangue slimes, wherein the treating improves the selectivity of an anionic collector to one or more of spodumene and said lithium values. Further, a process for the selective recovery of lithium from lithium ion batteries is provided. 1. A process for the selective recovery of lithium values from feedstock , the process comprising:(a) concentration by one or more of air classification and flotation;(b) selective leaching to remove one or more of Mg, Ca and Na formations; and(c) leaching/sonication with an acid.2. The process of claim 1 , wherein said Mg and Ca formations are MgO and CaO respectively.3. The process of claim 1 , further comprising providing an added substance to enhance leaching.4. The process of claim 3 , wherein the substance comprises HSO.5. The process of claim 1 , wherein said selective leaching comprises using Nitric acid.6. The process of claim 5 , wherein the nitric acid is used in concentrations from 10% to 90%.7. The process of claim 1 , wherein the acid is sulfuric acid.8. The process of claim 7 , wherein the acid is said nitric acid and the leaching/sonication is performed over a period ranging from about 5 minutes up to about 120 minutes.9. The process of claim 8 , wherein the feedstock is ultra fine clay and said period is closer to said 5 minutes.10. The process of claim 1 , wherein said step of concentration by air classification approximately doubles the concentration of said lithium values.11. The process of claim 1 , wherein said step of concentration ...

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Номер записи: 37
26-03-2015 дата публикации

INSULATING MINERAL FOAM

Номер: US20150083958A1
Автор: Bernardi Sébastien, DUCHAND Sylvain, Javierre Isabelle, ROY Cedric, Sabio Serge
Принадлежит:

A process for producing a mineral foam includes (i) separately preparing one or more slurries of cement, and an aqueous foam for which a D50 of bubbles is less than or equal to 400 μm; (ii) homogenizing the one or more slurries of cement with the aqueous foam to obtain a slurry of foamed cement; (iii) casting the slurry of foamed cement and leaving the cast slurry of foamed cement to set. 1. A process for production of a mineral foam comprising:(i) separately preparing one or more slurries of cement, and an aqueous foam for which a D50 of bubbles is less than or equal to 400 μm;(ii) homogenizing the one or more slurries of cement with the aqueous foam to obtain a slurry of foamed cement;(iii) casting the slurry of foamed cement and leaving the cast slurry of foamed cement to set.2. The process for production of a mineral foam according to claim 1 , wherein step (i) comprises the preparation of two slurries of cement claim 1 , one of which is a slurry of calcium aluminate cement.3. The process for production of a mineral foam according to claim 1 , wherein step (ii) comprises the introduction of the slurry or slurries of cement and the aqueous foam into a static mixer to obtain a slurry of foamed cement.4. A mineral foam obtainable according to the process of .5. The mineral foam obtainable according to having a density of 100 to 600 kg/m.7. The mineral foam according to claim 6 , wherein the slurry of foamed cement comprises 15 to 50% of mineral particles.8. The mineral foam according to claim 7 , wherein the mineral particles are selected from the group consisting of calcium carbonate claim 7 , silica claim 7 , ground glass claim 7 , solid or hollow glass beads claim 7 , glass granules claim 7 , expanded glass powders claim 7 , silica aerogels claim 7 , silica fume claim 7 , slags claim 7 , ground sedimentary siliceous sands claim 7 , fly ash or pozzolanic materials and mixtures thereof.9. The mineral foam according to claim 6 , wherein the calcium aluminate cement ...

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Номер записи: 38
22-03-2018 дата публикации

GYPSUM BOARDS WITH POLYMER COATING AND METHODS FOR MAKING SAME

Номер: US20180080226A1
Автор: Lu Runhai, ROHLF Evan V.
Принадлежит:

A gypsum board provided with a foamed gypsum core layer, a facing sheet over the foamed gypsum core, and a latex polymer coating layer on an outer surface of the facing sheet. The latex polymer having a glass transition temperature (Tg) of 0 to 35° F. Methods for making the board are also disclosed. 1. A gypsum board comprising:a face paper sheet having an inner bond surface and an outer surface, the face paper sheet inner bond surface opposed to the face paper sheet outer surface, the face paper sheet treated with a polymer coating composition disposed on the entire outer surface of the face paper sheet to have a polymer coating, 0.05 to 0.25 wt. % 2-amino-2-methyl-1-propanol,', '0 to 0.5 wt. % dispersant selected from at least one member of the group consisting of polycarboxylate dispersant, polyphosphate dispersant, and naphthalene dispersant,', 'preferably the polycarboxylate dispersant comprises a polycarboxylic ether dispersant,', 'preferably the naphthalene dispersant is selected from at least one of beta-naphthalene sulfonate, naphthalene sulfonate formaldehyde condensate and sodium naphthalene sulfate formaldehyde condensate,', 'preferably the polyphosphate dispersant is selected from at least one member of the group consisting of sodium trimetaphosphate (STMP), sodium tripolyphosphate (STPP), potassium tripolyphosphate (KTPP), tetrasodium pyrophosphate tetrapotassium pyrophosphate, and tetrapotassium pyrophosphate (TKPP), more preferably the polyphosphate is tetrapotassium pyrophosphate (TKPP),', '0.02 to 0.5 wt. % thickener selected from at least one member of the group consisting of a cellulose thickener and an acrylate thickener,', '0.01 to 0.5 wt. % silicon based defoamer,', '4.5 to 15 wt. %, preferably 4.8 to 6.5 wt. %, more preferably 4.8 to 5.2 wt. %, latex comprising latex polymer having a glass transition temperature (Tg) of 0 to 35° F., preferably 25 to 32° F., the latex polymer having a weight average molecular weight of 40,000 to 500,000, the ...

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Номер записи: 39
12-03-2020 дата публикации

Struvite-K and Syngenite Composition for Use in Building Materials

Номер: US20200079691A1
Автор: Boydston Gerald D., Centurione Sergio, Cherian Isaac K., Frailey Nathan, Ghosh Anirban, Hauber Robert J., Lamberet Severine, Pattarkine Gaurav V.
Принадлежит:

A composition and process for manufacture thereof used in hybrid inventive building materials comprising Syngenite (KCa(SO).HO) and Struvite-K (KMgPO.6HO). Starting constituents include magnesium oxide (MgO), monopotassium phosphate (MKP) and stucco (calcium sulfate hemihydrate), mixed in predetermined ratios, cause reactions to proceed through multiple phases, which reactions variously are proceeding simultaneously and in parallel. Variables, e.g., water temperature, pH, mixing times and rates, have been found to affect resultant reaction products. Preferred ratios of chemical constituents and manufacturing parameters, including predetermined weight percent and specified ratios of Struvite-K and Syngenite are provided for building products used for specified purposes. Reactions are optimized in stoichiometry and additives to reduce the combined heat of formation to non-destructive levels. Various additives help control and guide reactions. Building products, such as board panels, include the resultant composition. A significant amount of the composition is disposed adjacent a building panel face. 1. A process for the continuous manufacture of a composition for use in a building product comprising:a) providing a mixer reaction chamber;b) continuously feeding predetermined constituent materials into the mixer reaction chamber;c) continuously mixing the predetermined constituent materials within said mixing reaction chamber to produce a slurry;d) withdrawing the slurry from the mixer reaction chamber; and wherein said predetermined solid constituent materials comprise the following in specified ranges by weight percent:', 'MgO 3.33 to 70.00%', {'sub': 2', '4, 'KHPO: 4.67 to 70.00%'}, {'sub': 4', '2, 'stucco hemihydrate CaSO.½HO: 10.5 to 90.0%'}, 'and addition of water: 15 to 60% of the constituent solid materials., 'e) utilizing said slurry in the manufacture of a building product;'}2. The process for the continuous manufacture of a composition according to wherein ...

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Номер записи: 40
31-03-2022 дата публикации

SYSTEM FOR CONDITIONING STUCCO IN A DUST COLLECTOR

Номер: US20220099372A1
Автор: Chen Michael M.
Принадлежит: Schenck Process LLC

A system for conditioning stucco particulate material includes a vessel having separation chamber in communication with a holding chamber having a holding volume therein. The conditioning system includes the holding volume sufficient to condition the stucco particulate material therein and/or a control system configured to delay discharge of the stucco particulate material from the holding chamber. The system for conditioning stucco particulate material is configured to increase residence time of the stucco particulate material in the holding chamber to promote calcining conditioning therein. 1. A system for conditioning stucco particulate material , the system comprising:a vessel having separation chamber in communication with a holding chamber;the separation chamber having an inlet for supplying the stucco particulate material entrained in a gas, the separation chamber having a collector system configured for separating the stucco particulate material from the gas, the separation chamber having a gas outlet for discharging the gas from the separation chamber, the collector system having a discharge capacity for discharging the stucco particulate material therefrom and into the holding chamber;{'claim-text': ['(a) the holding volume is of a predetermined magnitude sufficient to condition the stucco particulate material in the holding chamber, before being discharged through the stucco outlet; and', '(b) a control unit in communication with a drive unit connected to the conveyor, a sensor in communication with the holding chamber and the control unit, the sensor being configured to generate control signals at a setpoint and transmitting the control signals to the control unit, the control unit being configured to control the drive unit based upon the control signals, to accumulate and retain the stucco particulate material in the holding chamber for conditioning, before being discharged through the stucco outlet.'], '#text': 'the holding chamber defining a holding ...

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Номер записи: 41
19-03-2020 дата публикации

CONCRETE PRODUCT AND METHODS OF PREPARING THE SAME

Номер: US20200087202A1
Автор: Adams Jason S.
Принадлежит: S3 Concrete Technologies, Inc.

A jointless concrete slab set by pouring a concrete slurry includes a) a concrete mixture; b) a colloidal silica admixture; and c) at least one reinforcing fiber selected from the group of fibers. As the poured concrete slurry cures, the poured slurry hardens into a composite material slab, and the jointless concrete slab defines capillary structures that at least in part fill with silica particles and lime, to produce a gel structure of calcium silicate hydrate. In another exemplary embodiment, the present invention is directed to a process for placing a jointless fiberless slab. The process comprises the steps of a) preparing a concrete slurry; b) pouring the concrete slurry onto the substrate; and c) allowing the concrete slurry to cure. In another exemplary embodiment, the present invention is directed to the product itself; namely, a jointless and/or fiberless concrete slab. 1. A jointless concrete slab set by pouring a concrete slurry onto a substrate , the poured concrete slurry comprising:a) a concrete mixture;b) a colloidal silica admixture; andc) at least one fiber selected from the group of fibers consisting of steel fibers and synthetic fibers;wherein, as the poured concrete slurry cures, the poured slurry hardens into a composite material taking the form of a jointless concrete slab, the jointless concrete slab defining capillary structures that at least in part fill with silica particles and lime, and wherein the silica particles and lime react to produce a gel structure of calcium silicate hydrate that at least partially fill the capillary structures;whereby the calcium silicate hydrate reduces internal tensile forces acting on the jointless concrete slab.2. The jointless concrete slab of claim 1 , wherein the colloidal silica admixture is an amorphous colloidal silica in an aqueous solution claim 1 , and wherein silica particles have a size ranging from between about 10.0 nanometers (nm) to about 100.0 nm.3. The jointless concrete slab of claim 1 , ...

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Номер записи: 42
07-04-2016 дата публикации

Construction Panel Having Improved Fixing Strength and Method for the Manufacture Thereof

Номер: US20160096772A1
Автор: HOTCHIN Glen, Jones Nicholas, Richardson Adam
Принадлежит:

A plasterboard comprises a gypsum matrix having fibres embedded therein. The plasterboard optionally has a backing lamina attached to one of the faces thereof. The gypsum matrix of the plasterboard optionally comprises a polymeric additive. 1. A panel comprising a plasterboard , the plasterboard having a backing lamina attached to one of the faces thereof , the plasterboard comprising a gypsum matrix having fibres embedded therein in an amount of at least 1 wt % relative to the gypsum.2. A panel according to claim 1 , wherein the gypsum matrix further comprises a starch additive claim 1 , the starch additive being present in an amount of at least 1 wt % relative to the gypsum.3. A panel according to claim 2 , wherein the starch additive is present in the gypsum matrix of the plasterboard in an amount of at least 2 wt % relative to the gypsum.4. A panel according to claim 1 , wherein the fibres are present in the gypsum matrix of the plasterboard in an amount of at least 2 wt % relative to the gypsum.5. A panel according to claim 1 , in which the fibres are selected from a group comprising glass fibres claim 1 , wood fibres claim 1 , fibres derived from wood (such as regenerated cellulose fibres) claim 1 , and mixtures thereof.6. A panel according to claim 5 , wherein the fibres are regenerated cellulose fibres and further wherein the average length of the fibres lies in the range 0.1-0.5 mm and/or the average diameter of the fibres is below 20 micron.7. A panel according to claim 1 , wherein the fibres are present within the board in the form of particles of agglomerated fibres claim 1 , such as paper particles or wood particles.8. A panel according to claim 7 , wherein the maximum dimension of the particles is in the range 0.5-3 mm and/or the average length of the fibres within the particles is in the range 1-15 mm and/or the average diameter of the fibres within the particles is in the range 1-50 micron.9. A panel according to claim 5 , wherein the fibres are ...

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Номер записи: 43
06-04-2017 дата публикации

THREE COMPONENT COMPOSITION FOR THE MANUFACTURE OF POLYURETHANE CEMENTITIOUS HYBRID FLOORING OR COATING WITH IMPROVED SURFACE GLOSS

Номер: US20170096368A1
Автор: GANTNER Hans, GIMENO Patricia, GRÖTZINGER Jochen, KADDATZ Carola
Принадлежит:

The present invention relates to a three component composition consisting of a polyol component (A) comprising at least two polyols, one with high and one with low molecular weight, and water, a polyisocyanate component (B) comprising a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2.5, or a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2 and at least one further polyol with an amount of between 1% and 30% based on the weight of said polyisocyanate component (B), wherein said MDI product and said polyol have reacted at least partially, and a powder component (C) comprising at least one hydraulic binder, preferably cement and/or calcined paper sludge, preferably a calcium compound selected from calcium hydroxide and/or calcium oxide, and optionally one or more aggregates. Polyurethane cementitious hybrid flooring or coating systems having glossy/semiglossy surfaces, good workability and outstanding mechanical properties can be achieved. Blister formation can be avoided. 1. Three component composition consisting of at least one polyol P1a with an average molecular weight of 800 to 30′000 g/mol, preferably 850 to 20′000 g/mol, more preferably 900 to 10′000 g/mol, and', 'at least one polyol P1b with an average molecular weight of 48 to 800 g/mol, preferably 60 to 600 g/mol, more preferably 60 to 400 g/mol, most preferably 60 to 300 g/mol, and', 'water, and, 'a) a polyol component (A) comprising'} a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2.5, or', 'a methylene diphenyl diisocyanate (MDI) product with an average NCO functionality of at least 2 and at least one polyol P2 with an amount of between 1 and 30%, preferably between 5 and 25%, more preferably between 10 and 20% by weight, based on the weight of said polyisocyanate component (B), wherein said MDI product and said polyol P2 have reacted at least partially, and, 'b) a ...

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Номер записи: 44
26-06-2014 дата публикации

BASE-MEDIATED HYDROPHOBING COMPOSITIONS AND PROCESSES

Номер: US20140178624A1
Автор: Tilford Robert William
Принадлежит: Georgia-Pacific Gypsum LLC

Water-resistant gypsum boards and compositions and methods for their manufacture are provided. The methods include forming a mixture of water, hydroxide, and siliconate, adding siloxane to the mixture, adding calcium sulfate hemi-hydrate to the mixture to form an aqueous slurry, curing the aqueous slurry under heat, drying the aqueous slurry, and forming a water-resistant gypsum board. 1. A method for making a water-resistant gypsum board , comprising:forming a mixture of water and hydroxide;adding siloxane to the mixture;adding calcium sulfate hemi-hydrate to the mixture to form an aqueous slurry;curing the aqueous slurry under heat;drying the aqueous slurry; andforming a water-resistant gypsum board.2. The method of claim 1 , wherein the mixture further comprises siliconate.4. The method of claim 1 , wherein the pH of the aqueous slurry is above 9.5. The method of claim 1 , wherein the hydroxide is selected from the group consisting of sodium hydroxide claim 1 , potassium hydroxide claim 1 , lithium hydroxide claim 1 , rubidium hydroxide claim 1 , caesium hydroxide claim 1 , francium hydroxide claim 1 , calcium dihydroxide claim 1 , magnesium dihydroxide claim 1 , beryllium dihydroxide claim 1 , strontium dihydroxide claim 1 , barium dihydroxide claim 1 , radium dihydroxide claim 1 , and combinations thereof.6. The method of claim 1 , wherein curing the aqueous slurry comprises heating the aqueous slurry at a temperature of about 35° C. to about 300° C.8. The method of claim 1 , further comprising adding an accelerator to the mixture claim 1 , the accelerator comprises calcium sulfate dihydrate claim 1 , potassium sulfate claim 1 , or a combination thereof.9. The method of claim 1 , further comprising adding a dispersant to the mixture claim 1 , the dispersant comprising polynaphthalene sulfonate claim 1 , polycarboxylate claim 1 , or a combination thereof.10. The method of claim 1 , further comprising adding a foaming agent to the mixture claim 1 , the foaming ...

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Номер записи: 45
21-04-2016 дата публикации

COMPOSITIONS WITH SYNTHETIC GYPSUM AND METHODS

Номер: US20160107931A1
Автор: Ball Brian K., Blackburn Doug, Cloud Mike L., Kaligian Raymond A., Lettkeman Dennis Mark, Wilson John Wesley
Принадлежит:

DTPA-coated synthetic calcined gypsum is provided with alpha-like properties and obtained by spray-coating the synthetic caclined gypsum with DTPA. Cementitious compositions comprising DTPA-coated synthetic calcined gypsum and low water demand are provided as well. Methods for controlling an open time of a cementitious slurry by increasing or decreasing the amount of DTPA-coated synthetic calcined gypsum in the slurry are provided as well. 1. Synthetic calcined gypsum coated with diethylene-triamine-pentaacetic acid (DTPA) , wherein the synthetic calcined gypsum is obtained by spray-coating the synthetic calcined gypsum with DTPA in a fluidized bed chamber at a temperature in the range from 190 degrees Fahrenheit to 340 degrees Fahrenheit.2. The synthetic calcined gypsum coated with DTPA of claim 1 , wherein the setting time of the DTPA-coated synthetic calcined gypsum is from 150 to 300 minutes.3. The synthetic calcined gypsum coated with DTPA of claim 1 , wherein the temperature is in the range from 212 degrees Fahrenheit to 300 degrees Fahrenheit.4. The synthetic calcined gypsum coated with DTPA of claim 1 , wherein DTPA is used at 0.1 to 1.0 lbs/min for spray coating of the synthetic calcined gypsum in the fluidized bed chamber.5. The synthetic calcined gypsum coated with DTPA of claim 1 , wherein the DTPA-coated calcined gypsum is obtained without drying the DTPA-coated calcined gypsum after it exits from the fluidized bed chamber.6. The synthetic calcined gypsum coated with DTPA of claim 1 , wherein the dosage rate of spray coating with the DTPA is in the range of 0.1 to 40 lb/min of the DTPA liquid onto the synthetic calcined gypsum with a flow rate of approximately 9-11 tons/hour.7. The synthetic calcined gypsum coated with DTPA of claim 1 , wherein the DTPA-coated synthetic calcined gypsum is obtained by spray-coating the synthetic calcined gypsum with DTPA and additionally by spray-coating with a second compound selected from the group consisting of ...

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Номер записи: 46
30-04-2015 дата публикации

Gypsum-Based Building Products and Method for the Manufacture Thereof

Номер: US20150114264A1
Автор: Houga Clement, Taboulot Elodie
Принадлежит: SAINT-GOBAIN PLACO SAS

A building product comprises calcium sulphate dihydrate particles bound by an organic binder. The calcium sulphate dihydrate particles each have a longest dimension and a lateral dimension, wherein the lateral dimension corresponds to the maximum breadth of the particle about the axis defined by the longest dimension. The calcium sulphate dihydrate particles have a low aspect ratio such that for at least 75% of the calcium sulphate dihydrate particles, the value of the lateral dimension is at least 20% of the value of the longest dimension. 1. A building product comprising calcium sulphate dihydrate particles bound by an organic binder ,the calcium sulphate dihydrate particles each having a longest dimension and a lateral dimension, the lateral dimension corresponding to the maximum breadth of the particle about the axis defined by the longest dimension,the calcium sulphate dihydrate particles having a low aspect ratio such that for at least 75% of the calcium sulphate dihydrate particles, the value of the lateral dimension is at least 20% of the value of the longest dimension.2. A building product according to claim 1 , wherein the value of the lateral dimension is at least 40% of the value of the longest dimension.3. A building product comprising calcium sulphate dihydrate particles bound by an organic binder claim 1 , wherein 90 wt % of the calcium sulphate dihydrate particles have a particle size in the range of 1 μm to 3 mm.4. A building product according to claim 1 , wherein the building product is a self-supporting body.5. A building product according to claim 1 , wherein the binder is a vegetable-derived organic binder that is optionally modified through cross-linking.6. A building product according to claim 5 , wherein the binder comprises one or more of the following:soy and/or a derivative of soy;starch and/or a starch derivative.7. A building product according to claim 1 , wherein the binder is present in an amount of 0.5-30 wt % of the product.8. A ...

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Номер записи: 47
09-06-2022 дата публикации

METHOD FOR DRYING SLAB-SHAPED MATERIALS AND DRYING DEVICE

Номер: US20220177367A1
Автор: Straetmans Christoph
Принадлежит:

A method for drying building material slabs, in particular slabs containing gypsum, which are guided in floors () through an device divided into a drying pre-zone () and drying chambers and in which the slabs are brought into contact with drying air, characterized in that drying air is applied from the drying pre-zone () to the slabs in an area () arranged upstream of the pre-zone () and enclosed at least, with respect to the conveying direction of the boards, on both longitudinal sides and on the upper side. 115.-. (canceled)16. A method for drying building material slabs , wherein the method comprises guiding the slabs in floors through a device divided into a preliminary drying zone and drying chambers and in which the slabs are brought into contact with drying air , the drying air being applied from the preliminary drying zone to the slabs in an enclosed area which is arranged upstream of the preliminary drying zone and is enclosed , with respect to a conveying direction of the slabs , at least on both longitudinal sides and on an upper side thereof.17. The method of claim 16 , wherein the slabs comprise gypsum.18. The method of claim 16 , wherein exhaust air from the preliminary drying zone flows as drying air along the slabs in the enclosed area counter to a conveying direction of the slabs.19. The method of claim 16 , wherein the drying air from the enclosed area is fed to a chimney via a pipe.20. The method of claim 19 , wherein the drying air is withdrawn from the enclosed area by a fan inserted in the pipe.21. The method of claim 16 , wherein a supply of drying air into the enclosed area is controlled or regulated by temperature and/or humidity sensors.22. The method of claim 16 , wherein a slight negative pressure of 50 Pa or less claim 16 , is generated in the enclosed area.23. The method of claim 22 , wherein the negative pressure is 25 Pa or less.24. The method of claim 16 , wherein a moisture content of air in the enclosed area is controlled to a ...

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Номер записи: 48
07-05-2015 дата публикации

METHOD FOR REDUCING AGGLOMERATION IN GYPSUM PLASTER OR FILLING COMPOSITIONS COMPRISING CELLULOSE ETHER

Номер: US20150122152A1
Автор: Neubauer Joerg, Scharlemann Sonja
Принадлежит: Dow Global Technologies LLC

The present invention relates to a method for providing modified gypsum plaster or filling compositions having reduced agglomeration in comparison to gypsum plaster or filling compositions comprising cellulose ether in a specific amount from 0.1 to 1.0 weight percent, based on the total dry weight of said composition. Also provided are dry mortars comprising cellulose ether, gelatin and gypsum for use in such methods, and gypsum-free mixtures comprising cellulose ether and gelatin which may be added to gypsum binder for use a for use in such methods. 1. A method for providing a modified gypsum plaster or filling composition having reduced agglomeration in comparison to a gypsum plaster or filling composition comprising a water soluble cellulose ether in a specified amount X , where the specified amount is from 0.1 to 1.0 weight percent based on the total dry weight of said composition components , said method comprising:a) forming a dry mortar comprising gypsum binder; water soluble cellulose ether in an amount of X minus Y; and gelatin in an amount Y, wherein Y is from 0.02X to 0.30X; andb) combining said dry mortar with water to form a modified gypsum plaster or filling composition.2. The method according to claim 1 , wherein said cellulose ether is an alkylhydroxyalkylcellulose claim 1 , a hydroxyalkyl cellulose claim 1 , an alkyl cellulose or a mixture thereof.3. The method according to claim 2 , wherein said alkylhydroxyalkylcellulose is selected from a methylhydroxyethylcellulose (MHEC) claim 2 , an ethylhydroxyethylcellulose (EHEC) claim 2 , a methyl hydroxypropylcellulose (MHPC) claim 2 , a methylethylhydroxyethylcellulose (MEHEC) claim 2 , a methylhydroxy-ethylhydroxypropylcellulose (MHEHPC) and mixtures thereof.4. The method according to claim 2 , wherein claim 2 , when said cellulose ether is an alkylhydroxyalkylcellulose claim 2 , said alkylhydroxyalkylcellulose has a DS(alkyl) of from >1 to 1.99 and an MS (hydroxyalkyl) of from 0.01 to <1 claim 2 , ...

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Номер записи: 49
05-05-2016 дата публикации

POLYMERIC DISPERSANT

Номер: US20160122243A1
Автор: GAEDT Torben, Grafetstetter Antonia, GRASSL Harald, HILLESHEIM Nina Susanne, Schinabeck Michael, Winklbauer Martin
Принадлежит:

The invention relates to a dispersant comprising a polymer obtainable by copolymerization of monomers including 5 to 80 mol % of a hydroxyalkyl acrylate phosphate and/or hydroxyalkylacrylamide phosphate (monomer 1), 0 to 20 mol % of a di(hydroxyalkyl acrylate) phosphate and/or di(hydroxyalkylacrylamide) phosphate (monomer 2) and 1 to 80 mol % of a polyalkylene glycol-containing macromonomer comprising an alkene group (monomer 3). Further disclosed is a process for preparing the polymers of the invention and the use thereof as dispersants in calcium sulphate-containing compositions. A further aspect of the invention is a process for producing shaped gypsum bodies, and also shaped gypsum bodies, more particularly gypsum plasterboards and self-levelling screeds, comprising the dispersant of the invention. 113.-. (canceled)15. A dispersant according to claim 14 , wherein the polymer consists of monomer 1.16. A dispersant according to claim 14 , wherein the group Rboth in monomer 1 and in monomer 2 is an ethylene group.17. A dispersant according to claim 14 , wherein the group Rin monomer 1 is an ethylene group.18. A dispersant according to claim 14 , wherein the polymer consists of monomer 1 and monomer 2.19. A dispersant according to claim 18 , wherein the group Rboth in monomer 1 and monomer 2 is an ethylene group.20. A dispersant according to claim 14 , wherein the polymer has an average molecular weight of between 15 claim 14 ,000 and 60 claim 14 ,000 g/mol claim 14 , the molecular weight being measured by gel permeation chromatography against a PEG standard.21. A process for preparing a polymer according to claim 14 , comprising:copolymerizing in an aqueous solution at least one monomer 1 of the formula (1), optionally at least one monomer 2 of the formula (2), and at least one monomer 3 of the formula (3).22. A process according to claim 21 , wherein the temperature of the reaction solution is set between 5 and 100° C. and the pH between 0.5 and 8.23. A calcium ...

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Номер записи: 50
04-05-2017 дата публикации

Method For Reducing Elemental Sulfur In Gypsum Products

Номер: US20170121183A1
Автор: Choung-Houng Lai, Chris Hilton, George Glavin, Helen ILYASHENKO, John W. College, Sang-Ho Lee, Yu-Zhi Kiang
Принадлежит: Certainteed Gypsum Inc

Disclosed are various methods for reducing levels of elemental sulfur within gypsum products such as wall board. Gypsum sometimes includes increased levels of elemental sulfur. Such sulfur can be corrosive and otherwise harmful at elevated levels. The disclosure contemplates reacting the elemental sulfur with copper to copper sulfide. This reaction has the benefit of reducing the levels of elemental sulfur present within the final gypsum product. The copper can be added at any of a variety of locations in the manufacturing process. This is a very efficient method for reducing elemental sulfur in the production of gypsum products.

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Номер записи: 51
23-04-2020 дата публикации

Recycling method of dihydrate gypsum from waste gypsum boards

Номер: US20200123055A1
Автор: Kentaro Matsuo, Makoto Kataoka, Shingo Hiranaka
Принадлежит: Tokuyama Corp

Gypsum derived from waste gypsum boards is calcined and converted into gypsum granules including hemihydrate and/or anhydrous type III gypsum. The calcined gypsum granules are dropped into water to prepare a gypsum slurry. Then, dihydrate gypsum particles are crystalized in the slurry. The temperature of the gypsum granules just before being dropped into the water is 90° C. or higher.

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Номер записи: 52
11-05-2017 дата публикации

SYSTEM AND METHOD FOR MANUFACTURING CEMENTITIOUS BOARDS WITH ON-LINE BOARD MEASUREMENT

Номер: US20170131701A1
Автор: Nelson Robert, Pauly Christopher Mark, Rowe Andrew, Whittington Charles
Принадлежит:

Embodiments of a system and a method for continuously measuring cementitious board during the continuous manufacture thereof can be used in connection with the manufacture of various cementitious products, including gypsum wallboard, for example. Embodiments of a system and a method for continuously measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. A height measuring system can be used to determine the relative amount the cementitious board sags as it passes over an unsupported span disposed between the forming station and the cutting station and to correlate the measured sag distance with a value of percent hydration of the cementitious slurry of that particular portion of the cementitious board. 1. A system for manufacturing a cementitious board , the cementitious board having a cementitious core interposed between a pair of cover sheets , the cementitious core formed from an aqueous cementitious slurry , the system comprising:a forming station, the forming station configured to form the cementitious board such that the cementitious board is within a predetermined thickness range;a conveyor, the conveyor configured to convey the cementitious board along a machine direction away from the forming station, the conveyor including an upstream support surface and a downstream support surface, the upstream support surface and the downstream support surface both extending along the machine direction and a cross-machine direction, the cross-machine direction being perpendicular to the machine direction, the upstream support surface and the downstream support surface in discontinuous relationship with respect to each other such that an unsupported span is defined therebetween along the machine direction over which the ...

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Номер записи: 53
11-06-2015 дата публикации

GYPSUM COMPOSITES CONTAINING CEMENTITIOUS MATERIALS AND METHODS

Номер: US20150158766A1
Автор: Fields Jeffrey T., Leavitt Mark Alexander, Teng Yi-Hsien Harry, Thomas Vincent B.
Принадлежит: Georgia-Pacific Gypsum LLC

Gypsum composites containing cementitious materials and methods of making the same are provided. Gypsum composites include gypsum and a cementitious material. Methods of making gypsum composites include combining gypsum stucco, water, and a cementitious material to form a slurry, and setting and drying the slurry to form a gypsum composite. 1. A method of making a gypsum composite , comprising:combining gypsum stucco, water, and a cementitious material to form a slurry; andsetting and drying the slurry to form a gypsum composite.2. The method of claim 1 , wherein the gypsum stucco comprises alpha hemihydrate gypsum claim 1 , beta hemihydrate gypsum claim 1 , or a combination thereof3. The method of claim 1 , wherein the cementitious material is selected from the group consisting of: calcium silicate cements claim 1 , calcium aluminate cements claim 1 , calcium sulfoaluminate cements claim 1 , phosphate cements claim 1 , magnesium oxychloride cements claim 1 , magnesium oxysulfate cements claim 1 , magnesium phosphate cements claim 1 , quick set cements claim 1 , and combinations thereof4. The method of claim 1 , wherein the cementitious material comprises Portland cement Type III.5. The method of claim 1 , wherein the cementitious material comprises quick lime or hydrated lime.6. The method of claim 1 , wherein combining gypsum stucco claim 1 , water claim 1 , and cementitious material comprises first combining the cementitious material and the gypsum stucco to form a dry mix and subsequently combining the dry mix with the water.7. The method of claim 6 , wherein the dry mix comprises the cementitious material in an amount from 0.1 percent to 10 percent by weight of the dry mix.8. The method of claim 6 , wherein the dry mix comprises the cementitious material in an amount from about 0.5 percent to about 3 percent by weight of the dry mix.9. The method of claim 1 , wherein the slurry comprises water in an amount from about 50 percent to about 100 percent by weight of ...

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Номер записи: 54
09-06-2016 дата публикации

Production of pellets

Номер: US20160159691A1
Автор: Edwin C. Kercher, Joshua S. Long, Michael A. DiNovo
Принадлежит: Kercher Industries Inc

A process for manufacturing pellets includes providing a first supply of a first material and a second supply of a binder including a second material in respective storage units. The first supply of the first material is mixed in a counter-current mixer with the second supply of the binder and water to produce a plurality of pellets. The mixing occurs simultaneously with pelletizing in the mixer. The plurality of pellets are discharged from the mixer.

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Номер записи: 55
22-09-2022 дата публикации

STABILIZED GYPSUM PARTICLES

Номер: US20220298069A1
Автор: DIETZSCH Michael, GAEDT Torben, Gehrig Uwe, Hesse Christoph, NIEDERMAIR Fabian, SCHLESINGER Maik
Принадлежит:

The present invention is directed to a construction chemical composition for the preparation of gypsum articles, said construction chemical composition comprising fine calcium sulfate and a dispersant being a polyarylether. Further the present invention is directed to a process for preparing said construction chemical composition as well as an article comprising said construction chemical composition. 116.-. (canceled)17. A construction chemical composition , comprisingi) fine calcium sulfate particles having a D (0.63) particle size of less than 10.0 μm determined with laser diffraction according to Mie Theory, andii) a dispersant being a polyarylether,wherein the weight ratio between the fine calcium sulfate particles and the dispersant is in the range of 0.1:99.9 to 99.9:0.1.18. A construction chemical composition according to claim 17 , wherein the fine calcium sulfate particles are present in the form of calcium sulfate hemihydrate claim 17 , calcium sulfate dihydrate claim 17 , anhydrous calcium sulfate or mixtures thereof.19. A construction chemical composition according to claim 17 , wherein the polyarylether is a polycondensation product comprisingi) at least one aromatic or heteroaromatic structural unit comprising a polyether side chain, andii) at least one phosphated aromatic or heteroaromatic structural unit.21. A process for the preparation of a construction chemical composition comprising fine calcium sulfate having a D (0.63) particle size of less than 10.0 um determined with laser diffraction according to Mie Theory and a dispersant being a polyarylether claim 17 , said process comprising the steps ofaa) providing a suspension comprising calcium sulfate particles having a D (0.63) particle size equal or above 10.0 um determined with laser diffraction according to Mie Theory, water and a dispersant being a polyarylether, andab) wet-grinding of the slurry obtained in step aa), thereby obtaining the construction chemical composition,wherein the weight ...

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Номер записи: 56
30-05-2019 дата публикации

Sizing composition for wet use chopped strand glass fibers

Номер: US20190161405A1
Автор: Helen Huang, Mohammed Tazi
Принадлежит: OCV Intellectual Capital LLC

A sizing composition including water, a polyvinylpyrrolidone film former, a silane coupling agent, a lubricant, and a surfactant is provided. The polyvinylpyrrolidone film former constitutes from 30 wt. % to 50 wt. % of the dry solids of the sizing composition. Wet use chopped strand glass fibers for use in reinforcing gypsum board are also provided. The wet use chopped strand glass fibers include chopped glass fibers having the sizing composition applied thereto. The sizing composition improves fiber bundle integrity, fiber flow rate, fiber flow rate consistency, and dispersibility of the wet use chopped strand glass fibers in a gypsum matrix or slurry.

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Номер записи: 57
25-06-2015 дата публикации

GYPSUM BOARD WITH IMPROVED STARCH BINDER

Номер: US20150175482A1
Автор: Miatudila Ma-ikay, Stav Eli, Wiggins Susan
Принадлежит:

Gypsum board having improved performance is obtained by controlling the distribution of starch in the gypsum core of the board and the gelling temperature of the starch. Starch migration in the board is controlled by the degree of acid-modification, to adjust the starch viscosity profile. The starch gelling temperature is controlled by chemical modification of the starch —OH groups. 1. A gypsum board formed from a gypsum slurry having a composition comprising:stucco; andan acid modified starch having a peak viscosity of between about 200 BU to about 2000 BU.2. The gypsum board of claim 1 , wherein the acid modified starch has a peak viscosity of between about 800 BU to about 2000 BU.3. The gypsum board of claim 1 , wherein the acid modified starch has a peak viscosity of between about 200 BU to about 800 BU.4. The gypsum board of claim 1 , wherein the acid modified starch is chemically modified to reduce the peak gelling temperature.5. The gypsum board of claim 1 , wherein the acid modified starch is chemically modified to reduce hydrogen bonding between starch molecules.6. The gypsum board of claim 1 , wherein acid modified starch has —OH groups that are modified by ethoxylation.7. The gypsum board of claim 6 , wherein the acid modified starch has a peak gelling temperature of about 180° F. or less.8. The gypsum board of claim 6 , wherein the acid modified starch has a peak gelling temperature of about 170° F. or less.9. The gypsum board of claim 6 , wherein the acid modified starch has a peak gelling temperature of about 165° F. or less.10. The gypsum board of claim 6 , wherein the acid modified starch has a peak gelling temperature of between about 150° F. to about 165° F.11. A gypsum board claim 6 , comprising:a gypsum core formed from a gypsum slurry comprising stucco and an acid modified starch, the gypsum core having a front side, a back side, and a center core between the front and back sides; anda facing material disposed at the front and back sides of the ...

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Номер записи: 58
29-06-2017 дата публикации

RAPID-SETTING HYDRAULIC BINDER COMPOSITION

Номер: US20170181931A1
Автор: CHO Jin Sang, Cho Kye Hong, CHOI Moon Kwan, Jang Sung Wook, MOON Ki Yeon
Принадлежит: Maruchi

The present invention relates to a rapid-setting hydraulic binder composition and, more specifically, to a hydraulic binder composition, which contains tricalcium aluminate (C3A) and dodecacalcium heptaaluminate (C12A7), and thus is rapidly set, has an easily adjustable setting time, and is bio-friendly. 1. A rapid-setting hydraulic binder composition , comprising:tricalcium aluminate (C3A);dodecacalcium heptaaluminate (C12A7); andcalcium hydroxide.2. A rapid-setting hydraulic binder composition as claimed in claim 1 , wherein content of the C12A7 is equal to or less than 1.5 times that of the C3A by weight.4. A rapid-setting hydraulic binder composition as clamed in claim 3 , further comprising calcium hydroxide.5. A rapid-setting hydraulic binder composition as claimed in claim 1 , wherein an average particle size of the calcium hydroxide is 15 micron or less.6. A rapid-setting hydraulic binder composition as claimed in claim 4 , wherein an average particle size of the calcium hydroxide is 15 micron or less claim 4 , and the calcium hydroxide is contained at 3 to 7% of the Portland cement by weight.7. A rapid-setting hydraulic binder composition as claimed in claim 1 , further comprising anhydride or hydrate of calcium sulfate.8. A rapid-setting hydraulic binder composition as claimed in claim 7 , wherein the hydrate of the calcium sulfate is calcium sulfate semi-hydrate or calcium sulfate dihydrate.9. A rapid-setting hydraulic binder composition as claimed in claim 3 , further comprising calcium sulfate semi-hydrate eluted from the Portland cement.10. A rapid-setting hydraulic binder composition as claimed in claim 1 , further comprising a pozzolanic substance.11. A rapid-setting hydraulic binder composition as claimed in claim 10 , wherein the pozzolanic substance includes at least one of volcanic glass claim 10 , a clayish pozzolanic substance claim 10 , a siliceous pozzolanic substance claim 10 , nano-alumina particles claim 10 , and nano-silica particles.12. ...

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Номер записи: 59
06-07-2017 дата публикации

Constrictor valve with webbing, cementitious slurry mixing and dispensing assembly, and method for making cementitious product

Номер: US20170189872A1
Автор: Ronald E. Schenck
Принадлежит: United States Gypsum Co

A constrictor valve can be associated with a conduit in fluid communication with a mixer to control a flow of cementitious slurry discharged from the mixer through the conduit. The constrictor valve can include a constrictor housing, a webbing constriction assembly, and a drive mechanism. The webbing constriction assembly includes a pair of rotatable members rotatably mounted to the constrictor housing and a plurality of webbing straps connected to the rotatable members and wrapped around the conduit. The drive mechanism includes a drive shaft and a gear assembly configured to rotate the rotatable members in opposing winding directions in response to the drive shaft rotating in a tighten direction to wrap the webbing straps tighter around the conduit to compress it and to rotate in opposing unwinding directions in response to the drive shaft rotating in a loosen direction to loosen the grip of the webbing straps on the conduit.

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Номер записи: 60
11-06-2020 дата публикации

GYPSUM FIBER BOARD AND METHOD FOR PRODUCING GYPSUM FIBER BOARDS

Номер: US20200181022A1
Автор: Burczeck Jürgen, Ivanova-Tsaneva Vanya, Scheller Lothar, Tsvetanov Vladimir, VOIGT Wolfgang
Принадлежит:

A gypsum fiber board produced in a Siempelkamp dry-process, comprising 75 wt % to 90 wt % (relative to the total dry mix) of calcium sulfate hemi-hydrate and 10 wt % to 25 wt % (relative to the total dry mix) paper fibers, wherein the calcium sulfate hemi-hydrate is a mixture of α-calcium sulfate hemi-hydrate and β-calcium sulfate hemi-hydrate, wherein the content of α-calcium sulfate hemi-hydrate in the mixture is at least 5 wt % (relative to the total calcium sulfate hemi-hydrate) is disclosed. Also disclosed is a method for producing a gypsum fiber board of a thickness of 23 mm in a Siempelkamp dry-process. 1. Gypsum fiber board produced in a Siempelkamp process , comprising 75 wt % to 90 wt % , relative to the total dry mix , of calcium sulfate hemi-hydrate and 10 wt % to 25 wt % , relative to the total dry mix , paper fibers , wherein the calcium sulfate hemi-hydrate is a mixture of α-calcium sulfate hemi-hydrate and β-calcium sulfate hemi-hydrate , wherein the content of α-calcium sulfate hemi-hydrate is at least 5 wt % , relative to the total calcium sulfate hemi-hydrate.2. Gypsum fiber board according to claim 1 , wherein the content of α-calcium sulfate hemi-hydrate is at least 20 wt % claim 1 , relative to the total calcium sulfate hemi-hydrate claim 1 , in particular claim 1 , about 30 wt % claim 1 , relative to the total calcium sulfate hemi-hydrate.3. Gypsum fiber board according to claim 1 , wherein the content of β-calcium sulfate hemi-hydrate is at least 50 wt % claim 1 , relative to the total calcium sulfate hemi-hydrate claim 1 , in particular claim 1 , about 60 wt % claim 1 , relative to the total calcium sulfate hemi-hydrate.4. Gypsum fiber board according to claim 1 , further comprising retardant claim 1 , in particular claim 1 , citric acid.5. Gypsum fiber board according to claim 1 , further comprising an accelerator claim 1 , in particular claim 1 , dihydrate.6. Gypsum fiber board according to claim 1 , wherein the board has a thickness ...

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Номер записи: 61
30-07-2015 дата публикации

METHOD FOR PRODUCING AGGREGATE AND CALCIUM CARBONATE FROM CONCRETE COMPOSITE MATERIALS, AND A DEVICE FOR CARRYING OUT SAID METHOD

Номер: US20150210594A1
Автор: Achenbach Gunther
Принадлежит: CEMEX RESEARCH GROUP AG

The invention relates to a method for producing aggregate and calcium carbonate from concrete aggregate, and a device for carrying out said method. 1. A method for producing aggregate materials and calcium carbonate from concrete aggregate , said method comprising the following steps:introducing bulk material comprising concrete aggregate into a reaction chamber;feeding a gas comprising carbon dioxide into the reaction chamber;comminuting the bulk material in the reaction chamber;allowing the concrete aggregate and the gas comprising carbon dioxide to react with one another to form reaction products in the reaction chamber;moving the bulk material through a water bath during the comminution and the reaction period; andremoving the reaction products from the reaction chamber.2. The method according to claim 1 , wherein the bulk material and the gas comprising carbon dioxide are conducted through the reaction chamber in opposite directions.3. The method according to claim 1 , wherein the concrete aggregate of the bulk material and the gas comprising carbon dioxide are left to react with one another so as to form reaction products at a temperature in a temperature range from 60 to less than 90° C.4. The method according to claim 1 , wherein a combustion gas comprising carbon dioxide is fed to the reaction chamber.5. The method according to claim 1 , wherein the bulk material is saturated with water during the comminution and the reaction period claim 1 , such that the concrete aggregate is saturated with water to an extent of at least 90% in relation to the mass of water necessary for complete saturation of the concrete aggregate with water.6. The method according to claim 1 , wherein the bulk material comprises concrete aggregate to an extent of at least 90 mass % in relation to the mass of the bulk material.7. The method according to claim 1 , wherein the concrete aggregate is formed from hardened cement paste and aggregate.8. The method according to claim 1 , ...

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Номер записи: 62
13-08-2015 дата публикации

Gypsum composition, gypsum slurry, gypsum hardened body, gypsum-based building material, gypsum board, and manufacturing method for a gypsum-based building material

Номер: US20150225293A1
Автор: Yosuke Sato, Yuji Ataka
Принадлежит: Yoshino Gypsum Co Ltd

A gypsum composition includes a calcined gypsum and a starch urea phosphate.

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Номер записи: 63
04-08-2016 дата публикации

GYPSUM PANELS, SYSTEMS, AND METHODS

Номер: US20160222647A1
Автор: Bradford Rochelle, Sanders Christopher J., Teng Yi-Hsien Harry, Thomas Vincent B.
Принадлежит: Georgia-Pacific Gypsum LLC

Gypsum panels, sheathing systems, and methods of making and using the same are provided. A gypsum panel includes a gypsum core associated with a first fiberglass mat having a continuous barrier coating, the coating penetrating a portion of the first fiberglass mat opposite the gypsum core, wherein gypsum penetrates a remaining fibrous portion of the first fiberglass mat such that voids in the first fiberglass mat are substantially eliminated. A building sheathing system includes at least two gypsum panels and a seaming component to provide a seam at an interface between the gypsum panels. 1. A building sheathing system , comprising:at least two gypsum panels; anda seaming component configured to provide a seam at an interface between at least two of the gypsum panels, the system passes a hydrostatic head test against water leakage, as measured by AATCC 127-2008,', 'the system displays no water leaks when measured according to ICC Evaluation Service Acceptance Criteria 212,', 'the system passes ICC Evaluation Service Acceptance Criteria 310, and/or', 'the system displays no water leaks when measured according to ASTM E331 wall assembly test., 'wherein2. The building sheathing system of claim 1 , wherein each gypsum panel comprises a gypsum core associated with a first fiberglass mat having a continuous barrier coating claim 1 , the coating penetrating a portion of the first fiberglass mat opposite the gypsum core claim 1 ,wherein gypsum of the gypsum core penetrates a remaining fibrous portion of the first fiberglass mat such that voids in the first fiberglass mat are substantially eliminated.3. The building sheathing system of claim 1 , wherein the seaming component comprises tape or a bonding material.4. The building sheathing system of claim 3 , wherein the seaming component comprises a bonding material selected from the group consisting of synthetic stucco plasters claim 3 , cement plasters claim 3 , synthetic acrylics claim 3 , sand-filled acrylics claim 3 , ...

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Номер записи: 64
04-08-2016 дата публикации

GYPSUM PANELS, SYSTEMS, AND METHODS

Номер: US20160222656A1
Автор: Bradford Rochelle, Sanders Christopher J., Teng Yi-Hsien Harry, Thomas Vincent B., Tricker Andrew W.
Принадлежит: Georgia-Pacific Gypsum LLC

Gypsum panels and methods for their manufacture are provided herein. The gypsum panels include a gypsum core having a first surface and a second opposed surface and a first fiberglass mat associated with the first surface of the gypsum core, such that gypsum from the gypsum core penetrates at least a portion of the first fiberglass mat. 1. A method of making a gypsum panel , comprising:depositing a first gypsum slurry onto a first surface of a first fiberglass mat, such that the first gypsum slurry penetrates at least a portion of the first fiberglass mat; andallowing the first gypsum slurry to set to form at least a portion of a gypsum core,wherein the first gypsum slurry comprises a wetting agent in an amount effective to reduce a surface tension of the first gypsum slurry.2. The method of claim 1 , wherein the first gypsum slurry comprises the wetting agent in an amount effective to bring a slurry surface tension of the first gypsum slurry to from about 30 dyne/cm to about 60 dyne/cm.3. The method of claim 1 , wherein the wetting agent comprises a surfactant having a boiling point of 200° C. or lower.4. The method of claim 3 , wherein the surfactant comprises a multifunctional agent based on acetylenic chemistry or an ethoxylated low-foam agent.5. The method of claim 3 , wherein the surfactant is present in the first gypsum slurry in an amount of about 0.01 percent to about 1 percent claim 3 , by weight.6. The method of claim 1 , wherein the first gypsum slurry is deposited in an amount of from about 5 percent to about 20 percent claim 1 , by weight claim 1 , of the gypsum core.7. The method of claim 1 , further comprising applying a continuous barrier coating to a second surface of the first fiberglass mat opposite the gypsum core claim 1 , the continuous barrier coating penetrating a portion of the first fiberglass mat claim 1 , to define a remaining portion of the first fiberglass mat claim 1 , wherein gypsum from the gypsum core penetrates the remaining ...

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Номер записи: 65
27-08-2015 дата публикации

Gypsum Based Formulations

Номер: US20150239779A1
Автор: Chotard Thierry, Dupas Cyrielle S., Smith Agnes, Wilkes Ian Paul
Принадлежит:

The formulation for making plasterboard with paper cover sheets comprises finely divided gypsum, a minor amount by weight of starch and, as crosslinking agent for the starch, a tri-functional reactive s-triazine having substituents at positions 2, 4 and 6 of the triazine ring which are reactive with the starch. A preferred crosslinking agent is 2,4,6-trichloro-s-triazine, which is preferably partially reacted with the starch before further reaction with the paper cover sheets for the plaster board. 1. A gypsum formulation , which comprises finely divided gypsum , a minor amount by weight of starch and , as crosslinking agent for the starch , a trifunctional reactive s-triazine having substituents at positions 2 , 4 and 6 of the triazine ring which are reactive with the starch , wherein the crosslinking agent is partially reacted with the starch prior to mixing with the gypsum.2. A method of producing plaster , which comprises mixing in water a finely divided gypsum , starch in a minor amount relative to the gypsum , and , as crosslinking agent for the starch , a tri-functional reactive s-triazine having substituents at positions 2 , 4 and 6 of the triazine ring which are reactive with the starch , so as to form a slurry , and allowing the slurry to set.3. A method according to claim 2 , wherein the crosslinking agent is 2 claim 2 ,4 claim 2 ,6-trichloro-s-triazine.4. A method according to claim 2 , wherein the slurry is fed between spaced surface reinforcements so as to form a sandwich structure and the slurry is allowed to set between the surface reinforcements.5. A method according to claim 4 , wherein the surface reinforcements are of paper.6. A method according to claim 2 , wherein the slurry is allowed to set at a temperature of at least 50° C.7. A plaster board claim 2 , comprising: a first cover sheet; a second cover sheet; and a core disposed between the first and second cover sheets claim 2 , the core comprising calcium sulphate dihydrate claim 2 , and a ...

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Номер записи: 66
27-08-2015 дата публикации

FIRE CORE COMPOSITIONS AND METHODS

Номер: US20150240163A1
Автор: Welker Charles D.
Принадлежит:

The present invention describes an improved building material composition, useful for example as a fire door core and the improved methods of making this composition. More particularly, the building material of the present invention is prepared from hollow microspheres and an aqueous mixture of a cementitious composition containing at least one of the following: a hydraulic cement, an accelerant, or a refractory binder, which composition can be molded and shaped into a fire door core. 1. A composition useful for producing a fire door core comprising a mixture of:(a) a hollow microsphere and (i) a hydraulic cement,', '(ii) an accelerant, or', '(iii) a binder;, '(b) a cementitious composition comprising at least one of the followingwherein the composition can be molded or shaped into a fire door core.2. The composition of claim 1 , wherein the hollow microspheres are selected from the group consisting of: glass claim 1 , ceramic claim 1 , metals claim 1 , plastic claim 1 , and composites.3. The composition of claim 1 , wherein the cementitious composition includes the hydraulic cement claim 1 , and the hydraulic cement is selected from the group consisting of: refractory cement claim 1 , calcium aluminate cement claim 1 , CIMENT FONDU cement claim 1 , Portland cement claim 1 , magnesium based cement claim 1 , gypsum cement claim 1 , cements with a mixture of silicates claim 1 , oxides claim 1 , perlite claim 1 , clay claim 1 , bentonite clay claim 1 , or fire clay claim 1 , and combinations thereof.4. The composition of claim 1 , wherein the cementitious composition includes the accelerant claim 1 , and the accelerant is selected from the group consisting of: alkali metal halides claim 1 , alkali metal nitrites claim 1 , alkali metal nitrates claim 1 , alkali metal formates claim 1 , alkali metal thiocyanates claim 1 , calcium chloride claim 1 , non-calcium chloride claim 1 , calcium carbonate claim 1 , calcium hydroxide claim 1 , triethanol amine claim 1 , sodium ...

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Номер записи: 67
18-08-2016 дата публикации

Method for producing a gypsum plasterboard

Номер: US20160236978A1
Автор: Jackek Piwowarski
Принадлежит: KNAUF GIPS KG

A method for producing a gypsum plasterboard comprising the steps of providing bundler dust obtained from gypsum plasterboard leftovers of a plasterboard trimming process by a trimming device, in particular by a bundler saw; and adding at least a part of the bundler dust to a gypsum slurry for producing the gypsum plasterboard.

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Номер записи: 68
18-08-2016 дата публикации

Struvite-K and Syngenite Composition for Use in Building Materials

Номер: US20160236979A1
Автор: Boydston Gerald D., Centurione Sergio, Cherian Isaac K., Frailey Nathan, Ghosh Anirban, Hauber Robert J., Lamberet Severine, Pattarkine Gaurav V.
Принадлежит: CERTAINTEED GYPSUM, INC.

A composition and process for manufacture thereof used in hybrid inventive building materials comprising Syngenite (KCa(SO).HO) and Struvite-K (KMgPO.6HO). Starting constituents include magnesium oxide (MgO), monopotassium phosphate (MKP) and stucco (calcium sulfate hemihydrate), mixed in predetermined ratios, cause reactions to proceed through multiple phases, which reactions variously are proceeding simultaneously and in parallel. Variables, e.g., water temperature, pH, mixing times and rates, have been found to affect resultant reaction products. Preferred ratios of chemical constituents and manufacturing parameters, including predetermined weight percent and specified ratios of Struvite-K and Syngenite are provided for building products used for specified purposes. Reactions are optimized in stoichiometry and additives to reduce the combined heat of formation to non-destructive levels. Various additives help control and guide reactions. Building products, such as board panels, include the resultant composition. A significant amount of the composition is disposed adjacent a building panel face. 1. A process for the continuous manufacture of a building product composition for use in a building product comprising:a) providing a mixer reaction chamber;b) continuously feeding predetermined constituent materials into the mixer reaction chamber;c) continuously mixing the predetermined constituent materials within said mixing reaction chamber for a length of time sufficient to produce a slurry;d) withdrawing the slurry from the mixer reaction chamber; and wherein said predetermined solid constituent materials comprise the following in specified ranges by weight percent:', 'MgO 3.33 to 70.00%', {'sub': 2', '4, 'KHPO: 4.67 to 70.00%'}, {'sub': 4', '2, 'stucco hemihydrate CaSO.1/2HO: 10.5 to 90.0%'}, 'and addition of water: 15 to 60% of the constituent solid materials., 'e) utilizing said slurry in the manufacture of a lightweight building product;'}2. The process for the ...

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Номер записи: 69
26-08-2021 дата публикации

Processes for the Production of Citric Acid

Номер: US20210261489A1
Автор: Ethan NOVEK
Принадлежит: Innovator Energy LLC

The present application pertains to methods for making metal oxides and/or citric acid. In one embodiment, the application pertains to a process for producing calcium oxide, magnesium oxide, or both from a material comprising calcium and magnesium. The process may include reacting a material comprising calcium carbonate and magnesium carbonate. Separating, concentrating, and calcining may lead to the production of oxides such as calcium oxide or magnesium oxide. In other embodiments the application pertains to methods for producing an alkaline-earth oxide and a carboxylic acid from an alkaline earth cation—carboxylic acid anion salt. Such processes may include, for example, reacting an alkaline-earth cation—carboxylic acid anion salt with aqueous sulfur dioxide to produce aqueous alkaline-earth—bisulfite and aqueous carboxylic acid solution. Other useful steps may include desorbing, separating, and/or calcining.

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Номер записи: 70
07-09-2017 дата публикации

METHOD OF PRODUCING GYPSUM BINDER

Номер: US20170253525A1
Автор: KORNIENKO IGOR IVANOVICH
Принадлежит:

A method of producing a gypsum binder, the method including dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages, wherein the heating gypsum raw material lumps is performed either by: (i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation of gypsum α-hemihydrate occurs; and/or (ii) placing the lumps in a heating medium having a high rate of temperature increase such that a temperature higher than the temperature under which dehydration and formation of gypsum α-hemihydrate occurs is reached; wherein a heating time is selected sufficient for completion of the process of gypsum α-modification formation within the gypsum lumps, and wherein the heating is performed under atmospheric pressure through lump surface. 1. A method of producing a gypsum binder , the method comprising:dehydrating of gypsum raw material lumps by heating in a gaseous medium with further drying, cooling, and milling stages,wherein the heating gypsum raw material lumps is performed either by:(i) placing the lumps in a heating medium set to a temperature exceeding the temperature under which dehydration and formation of gypsum α-hemihydrate occurs; or(ii) placing the lumps in a heating medium having a high rate of temperature increase such that a temperature higher than the temperature under which dehydration and formation of gypsum α-hemihydrate occurs is reached;wherein a heating time is selected sufficient for completion of gypsum α-modification formation within the gypsum lumps, andwherein the heating is performed under atmospheric pressure through lump surface.2. The method of claim 1 , wherein natural gypsum stone and/or synthetic gypsum claim 1 , and/or recycled gypsum are used as gypsum raw materials.3. The method of claim 2 , wherein the lumps of gypsum raw material are formed by crushing and/or agglomerating.4. The method of claim 1 , wherein the ...

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Номер записи: 71
06-08-2020 дата публикации

Asymmetrical Laminate Panel and Method of Manufacture

Номер: US20200247091A1
Автор: EVANS Phillip, Glean Aldo
Принадлежит:

The present disclosure relates generally to plaster wall panels, for example, suitable for covering interior wall frames. The present disclosure relates more particularly to a plaster wall panel including a first plaster layer, a second plaster layer, and a damping layer disposed between the first and second plaster layers. The first plaster layer has a first thickness and is composed of a first plaster material that has a first material property. The second plaster layer has a second thickness and is composed of a second plaster material that has a second material property. The first thickness is smaller than the second thickness, and the first and second material properties are different. 1. A plaster wall panel comprising:a first plaster layer having a first thickness and being composed of a first plaster material having a first material property;a second plaster layer having a second thickness and being composed of a second plaster material having a second material property, wherein the first thickness is smaller than the second thickness and wherein the first and second material properties are different; anda damping layer disposed between the first plaster layer and the second plaster layer.2. The plaster wall panel according to claim 1 , wherein at least one of the first plaster material and second plaster material comprises a base material that is a gypsum material.3. The plaster wall panel according to claim 1 , wherein at least one of the first plaster material and second plaster material comprises a base material that is lime or a cement.4. The plaster wall panel according to claim 1 , wherein the first thickness is in a range from 3% to 75% of the second thickness.5. The plaster wall panel according to claim 1 , wherein the elastic modulus of the first plaster material is in a range from 150% to 1000% of the elastic modulus of the second plaster material.6. The plaster wall panel according to claim 1 , wherein the density of the first plaster material is ...

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Номер записи: 72
14-10-2021 дата публикации

Mineral Recovery Enhanced Desalination (MRED) Process for Desalination and Recovery of Commodity Minerals

Номер: US20210317026A1
Автор: Howe Kerry, Thomson Bruce
Принадлежит: UNM Rainforest Innovations

A novel process for treatment of low quality or brackish water that allows increased recovery of high quality water, recovers commodity minerals and reduces the volume of water and mass of solids that are disposed from the process.

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Номер записи: 73
13-08-2020 дата публикации

COMPOSITE STRUCTURE FOR APPLYING TILES TO A SURFACE, AND SYSTEMS AND METHODS OF USING SAME

Номер: US20200254727A1
Автор: Burns James, ODUM THOMAS
Принадлежит:

A composite structure for use in tiling surfaces is disclosed. The composite structure can include a fiber matrix impregnated with a water-activated setting material. The composite structure can be wet and then compressed between a tile and an application surface. The composite structure can cure to provide a support surface for the tile. 1. A composite structure having respective upper and lower surfaces , the composite structure comprising:a fiber matrix; anda water-activated setting material, wherein the fiber matrix is impregnated with the water-activated setting material,wherein the composite structure is deformable prior to setting of the water-activated setting material so that the bottom surface of the composite structure conforms to an underlying application surface.2. The composite structure of claim 1 , wherein the composite structure has an uncompressed thickness between two millimeters and twenty millimeters.3. The composite structure of claim 1 , wherein the fiber matrix comprises a nonwoven material.4. The composite structure of claim 3 , wherein the nonwoven material comprises a nonwoven batt comprising fibers having a denier ranging from 4 to 150 claim 3 , wherein the fibers are positioned in an open pattern.5. The composite structure of claim 3 , wherein the fiber matrix comprises fibers in a velour pattern.6. The composite structure of claim 3 , wherein the fiber matrix comprises at least one of a melamine sponge claim 3 , a three-dimensional spunbond claim 3 , a three-dimensional woven fabric claim 3 , or a three-dimensional knitted fabric.7. The composite structure of claim 1 , wherein the water-activated setting material comprises Portland cement or gypsum.8. The composite structure of claim 1 , wherein the water-activated setting material is configured to set within five to ninety minutes of application of water to the water-activated setting material.9. The composite structure of claim 1 , wherein the composite structure has an uncompressed ...

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Номер записи: 74
13-08-2020 дата публикации

LIGNIN DERIVATIVE COMPOUND AND USE THEREOF

Номер: US20200255465A1
Автор: NAKAMURA Akihiko, Nakamura Takuma, NISHIMORI Yoshito, TAKAHASHI Kanae, TAMURA Sumio
Принадлежит: NIPPON PAPER INDUSTRIES CO., LTD.

From the viewpoint of a decrease in environmental impact in recent years, an object of the present invention is to effectively utilize lignin as a circulative biomass resource having high effect of reducing environmental impact. Specifically, the object is to provide a lignin derivative that can improve the dispersibility of various substances to be dispersed regardless of uses of cements, dyes, oil field drilling mud, and the like. The present invention provides a lignin derivative compound that is a reaction product of a lignin sulfonic acid-based compound with an aromatic water-soluble compound, and a dispersant containing the same. The lignin derivative compound preferably has an anionic functional group and/or a polyalkylene oxide chain. 1. A lignin derivative compound that is a reaction product of a lignin sulfonic acid-based compound with an aromatic water-soluble compound.2. The lignin derivative compound according to claim 1 , having an anionic functional group.3. The lignin derivative compound according to claim 1 , having a polyalkylene oxide chain with an average addition molar number of an alkylene oxide of 25 or more.4. The lignin derivative compound according to claim 1 , wherein a reaction weight ratio ([L]/[M]) of the lignin sulfonic acid-based compound [L] and the aromatic water-soluble compound [M] is 1 to 99/99 to 1.5. The lignin derivative compound according to claim 1 , wherein the aromatic water-soluble compound comprises at least one selected from the group consisting of an aromatic compound having a polyalkyleneoxide chain claim 1 , an aromatic compound having a carboxyl group claim 1 , and an aromatic compound having a sulfo group.6. The lignin derivative compound according to claim 1 , wherein the aromatic water-soluble compound has a reaction rate of 50% or more.7. A dispersant comprising the lignin derivative compound according to .8. The dispersant according to claim 7 , which is a hydraulic composition dispersant.9. The dispersant ...

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Номер записи: 75
20-08-2020 дата публикации

Method for the Production of Gypsum-Based Boards and Stucco Slurry Comprising Non-Pregelatinized Migratory Starch for Use Therewith

Номер: US20200262756A1
Автор: Fletcher James, Kamler Radomir, Morlat Richard
Принадлежит:

A method for continuously forming gypsum-based panels of high fixing strength comprises the steps of: •forming a mixture comprising stucco, non-pregelatinized migratory starch, glass fibre, fluidizer and water; •casting the mixture in a continuous band; •maintaining the band under conditions sufficient for the stucco to form an interlocking matrix of set gypsum; •cutting the band to form one or more wet panel precursors; and •drying the wet panel precursor to form one or more gypsum-based panels. •The weight ratio of water to stucco in the mixture is less than 0.7; •the stucco is present in the mixture in an amount of over 60 wt % relative to the total solids content of the mixture; •the starch is present in the mixture in an amount of over 3 wt % relative to the the stucco; •the glass fibre is present in the mixture in an amount of over 1 wt % relative to the stucco; •the fluidizer is is present in the mixture in an amount of at least 0.1 wt % relative to the stucco; and the density of the gypsum-based panel is greater than 700 kg/m. 112-. (canceled)13. A panel having a gypsum-based core that comprises a gypsum matrix having embedded therein a migratory starch in an amount of at least 3 wt % relative to the gypsum and glass fibre in an amount of at least 1 wt % relative to the gypsum , the panel having a maximum dimension greater than 1 m , wherein the density of the gypsum-based core is greater than 700 kg/m , and the amount of gypsum in the gypsum-based core is greater than 60 wt % , and further wherein the total volume of water voids in the gypsum-based core is less than the total volume of the gypsum in the panel core.14. The panel according to claim 13 , formed by a continuous method comprising:forming a mixture comprising stucco, migratory starch, glass fibre and water;casting the mixture in a continuous band;maintaining the band under conditions sufficient for the stucco to form an interlocking matrix of set gypsum;cutting the band to form one or more wet ...

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Номер записи: 76
20-10-2016 дата публикации

LIGHT WEIGHT GYPSUM WALLBOARD

Номер: US20160304397A1
Автор: LYNN Michael R., SONG Weixin D., YU Qiang
Принадлежит:

The invention generally provides gypsum-containing slurries including stucco, naphthalenesulfonate dispersant, and pregelatinized starch. The naphthalenesulfonate dispersant is present in an amount of about 0.1% -3.0% by weight based on the weight of dry stucco. The pregelatinized starch present in an amount of at least about 0.5% by weight up to about 10% by weight of pregelatinized starch by weight based on the weight of dry stucco in the formulation. Other slurry additives can include trimetaphosphate salts, accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, gypsum wallboard, and a method of making gypsum wallboard. 130-. (canceled)31. A light weight gypsum board comprising:a set gypsum composition disposed between two cover sheets, the set gypsum composition formed from at least water, stucco, pregelatinized starch, and foaming agent;the pregelatinized starch is in an amount from about 0.5% to about 10% by weight based on the weight of the stucco;the foaming agent comprises a major weight portion of unstable component and a minor weight portion of stable component, the amount of foaming agent and the weight ratio of said unstable component to stable component effective to form a void distribution within the set gypsum composition; andthe set gypsum composition comprises a continuous crystalline matrix substantially of calcium sulfate dihydrate, the board having a density of about 34 pcf or less, the pregelatinized starch is effective to increase the core hardness of the board relative to the board without the pregelatinized starch, and the board having a core hardness of at least about 11 lb, the core hardness determined according to ASTM standard C473.32. A light weight gypsum board comprising:a set gypsum composition disposed between two cover sheets, the set gypsum composition formed from at least water, stucco, pregelatinized starch, ...

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Номер записи: 77
29-10-2015 дата публикации

Composition for plasterboards and products obtained

Номер: US20150307397A1
Автор: Bernard Bouteiller, Sylvain Petigny, Yves Boussant-Roux
Принадлежит: Saint Gobain Placo Sas

The invention relates to a plaster-based composition comprising nanometric boehmite and/or nanometric aluminium trihydroxide, this composition making it possible to obtain products having better dimensional stability at high and in particular at very high temperature. The invention also relates to the method of obtaining the products, and the products produced.

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Номер записи: 78
05-11-2015 дата публикации

MIXING AND STIRRING DEVICE, MIXING AND STIRRING METHOD, AND METHOD FOR MANUFACTURING LIGHTWEIGHT GYPSUM BOARD

Номер: US20150315074A1
Автор: INENAGA Hitoshi, MATSUZAKI Yutaka, Ueno Yasutoshi
Принадлежит: YOSHINO GYPSUM CO., LTD.

Turning motion of gypsum slurry spouting onto a sheet of paper for a gypsum board liner is restricted for preventing maldistribution, deviation or irregular dispersion from occurring in the density distribution of the slurry on the sheet of paper. A mixing and stirring device for gypsum slurry has a circular casing forming a mixing area, a rotary disc positioned in the casing, and a tubular passage for feeding the slurry onto the sheet of paper for gypsum board liner. A chute has a fluid passage portion with its cross section being non-axisymmetric with respect to a center axis of the tubular passage, or a fluid passage portion varying a position of the center axis of the tubular passage by means of change or lateralization of the cross section of fluid passage. 123-. (canceled)24. A mixing and stirring device for gypsum slurry , which has a circular casing forming a mixing area for mixing of the gypsum slurry , a rotary disc positioned in the casing and rotated in a predetermined rotational direction , and a tubular passage for delivery of the gypsum slurry , which is provided outside of the casing in order to feed the slurry of the mixing area onto a sheet of paper for gypsum board liner , and which generates an intratubular swirling flow for mixing the gypsum slurry with foam or foaming agent for adjustment of a specific gravity ,wherein said tubular passage includes a chute which receives the gypsum slurry effluent from the casing through a slurry outlet port provided on the casing and which allows the slurry to flow down gravitationally therein, and a discharge pipe portion connected with an outlet part of said chute for spouting the slurry onto said sheet of paper;wherein said chute has an orifice passage which locally constricts a cross section of an intratubular area of the chute for causing the gypsum slurry and the foam or foaming agent to revolve in the intratubular area; andwherein a centroid of a figure of a cross section of the orifice passage is ...

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Номер записи: 79
25-10-2018 дата публикации

SHRINKAGE-COMPENSATING CONCRETE

Номер: US20180305256A1
Автор: Rice Edward K.
Принадлежит:

A shrinkage compensating concrete does not require restraint. The expansive forces developed during hydration compensate for concrete shrinkage, obviating the need for any added internal or external restraint element. Using this new shrinkage compensating concrete, substantially crack-free slabs may be built without using restraining steel bars, fibers, or other separate restraining element. The shrinkage compensating concrete includes a cement that develops internal expansive forces that never exceed the tensile strength of the concrete, such that the internal expansion compensates for the concrete shrinkage. The expansive cement may be an ASTMS, M or S cement, or other expansive cements may also be used. 1. A method of using a shrinkage-compensating mortar , comprising:making a shrinkage-compensating mortar by combining a hydraulic cement, an expansive additive, sand and water;forming the shrinkage-compensating mortar into a mortar structure, with substantially no internal restraint in the mortar structure and with no external restraint acting on the mortar structure.2. The method of wherein expansive forces developed during hydration compensate for shrinkage.3. The method of wherein internal expansive forces are at all times lower than its tensile strength claim 2 , such that internal expansion compensates for shrinkage claim 2 , resulting in shrinkage-compensation without the need for reinforcement.4. The method of wherein the expansive additive comprises an ASTM Type K cement.5. The method of wherein the expansive additive comprises an expansive cement.6. The method of wherein the expansive cement comprises an oxide or sulfate that expands upon hydration.7. The method of wherein the expansive cement comprises calcium sulfoaluminate.8. The method of having an expansion exceeding the limits of ASTM C 845.9. The method of wherein the hydraulic cement comprises Portland cement.10. A shrinkage-compensating mortar claim 7 , comprising:mixing hydraulic cement, an ...

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Номер записи: 80
24-09-2020 дата публикации

Granulated Blast-furnace Slag Activator, Its Manufacturing Method Thereof, and Manufacturing Method of Cement

Номер: US20200299194A1
Автор: Chen Qiao, Chen Zhifeng, GE Zhongxi, LIU Chengjian, Zhang Shujuan, Zhang Zhenqiu, Zhou Jian
Принадлежит: Tangshan Polar Bear Building Materials Co., Ltd.

Provided are a granulated blast-furnace slag activator and a method of manufacturing the same. The granulated blast-furnace slag activator includes, in percent by weight, the following raw materials: 62% to 95% of gypsum and 5% to 38% of high belite sulfoaluminate cement clinker. Also provided is a method of manufacturing cement by mixing the granulated blast-furnace slag activator with granulated blast-furnace slag at a certain ratio. 1. A granulated blast-furnace slag activator , comprising , in percent by weight , following raw materials: 62% to 95% of gypsum and 5% to 38% of high belite sulfoaluminate cement clinker.2. The granulated blast-furnace slag activator according to claim 1 , comprising claim 1 , in percent by weight claim 1 , following raw materials: 65% to 90% of gypsum and 10% to 35% of high belite sulfoaluminate cement clinker.3. The granulated blast-furnace slag activator according to claim 1 , wherein the high belite sulfoaluminate cement clinker comprises following chemical compositions in percent by weight: 49% to 54% of calcium oxide claim 1 , 12.9% to 17% of silicon dioxide claim 1 , 12% to 19% of aluminum oxide claim 1 , 0.15% to 3% of ferric oxide claim 1 , and 12% to 18.5% of sulfur trioxide.4. The granulated blast-furnace slag activator according to claim 2 , wherein the high belite sulfoaluminate cement clinker comprises following chemical compositions in percent by weight: 49% to 54% of calcium oxide claim 2 , 12.9% to 17% of silicon dioxide claim 2 , 12% to 19% of aluminum oxide claim 2 , 0.15% to 3% of ferric oxide claim 2 , and 12% to 18.5% of sulfur trioxide.5. The granulated blast-furnace slag activator according to claim 1 , wherein the high belite sulfoaluminate cement clinker comprises following mineral constituents: belite claim 1 , calcium sulfoaluminate claim 1 , tetracalcium aluminoferrite claim 1 , calcium sulfate claim 1 , and free lime.6. The granulated blast-furnace slag activator according to claim 2 , wherein the high ...

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Номер записи: 81
03-10-2019 дата публикации

GYPSUM ADDITIVE TO CONTROL MERCURY

Номер: US20190300429A1
Автор: Carlson Wayne M., Chen Tommy Hung-Ting, Denny Nicholas R., Keiser Bruce A., Yuan Jianwei
Принадлежит: ECOLAB USA INC.

Additives including sulfur-containing compounds are used in methods of treating synthetic gypsum. The additives can thermally stabilize heavy metals, such as mercury. This thermal stabilization reduces mercury release from the synthetic gypsum. Illustrative, non-limiting examples of sulfur-containing compounds include inorganic sulfides, organic sulfides, organic compounds containing nitrogen and sulfur, organic compounds containing oxygen and sulfur, and polymers containing sulfur. 1. A method of treating synthetic gypsum , comprising:transporting the synthetic gypsum from a wet flue gas desulfurizer; andcontacting the synthetic gypsum with an additive, the additive comprising a sulfur-containing compound, wherein the sulfur-containing compound is a polymer comprising sulfur that is modified to contain at least one of a sulfide and a dithiocarbamate salt group.2. The method of claim 1 , wherein the polymer comprising sulfur comprises about 5 mole % to about 100 mole % of dithiocarbamate salt groups.4. The method of claim 1 , wherein the polymer comprising sulfur is formulated with a sulfide precipitant.5. The method of claim 1 , wherein the polymer comprising sulfur is formed by reacting glycidyl (meth)acrylate claim 1 , allyl glycidyl ether or [(vinyloxy)methyl]oxirane with ammonia or a primary amine to form a first product claim 1 , reacting the first product with one or more of acrylic acid claim 1 , vinyl alcohol claim 1 , vinyl acetate claim 1 , acrylamide claim 1 , methylacrylic acid claim 1 , and methylacrylamide to form a second product claim 1 , and reacting the second product with a dithiocarbamic acid salt.6. The method of claim 1 , wherein the additive comprises water.7. The method of claim 1 , wherein the synthetic gypsum is contacted by the additive in a conduit leading to a kiln.8. A method of treating synthetic gypsum claim 1 , comprising:transporting the synthetic gypsum from a wet flue gas desulfurizer; andcontacting the synthetic gypsum with an ...

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Номер записи: 82
24-09-2020 дата публикации

PENETRATION PART FIREPROOF COATING MATERIAL

Номер: US20200299956A1
Автор: CHATANI Yukiko, HEBIISHI Takahiro, KURODA Eiichi, Ohuchi Wataru, SEKI Mariko, YAMAKATA Kouji, Yamashita Takuji
Принадлежит: YOSHINO GYPSUM CO., LTD.

A penetration part fireproof covering material used when a penetration part covered for fireproof is formed in a fireproof beam that is a fireproof constructional member that constitutes a wooden building, wherein the penetration part fireproof covering material is formed to have a tubular shape by stacking a plurality of gypsum board pieces () formed from gypsum boards in a thickness direction and unitarily connecting the plurality of gypsum board pieces. The penetration part fireproof covering material is formed to have the tubular shape by stacking the plurality of gypsum board pieces that preferably have an annular shape and are cut out from commercially available gypsum boards having thicknesses of 9.5 mm to 25.5 mm while fixing the plurality of gypsum board pieces to each other preferably using metal fasteners such as staples, and unitarily connecting the plurality of gypsum board pieces. 1. A penetration part fireproof covering material used when a penetration part covered for fireproofing is formed in a wooden building , wherein the fireproof covering material is formed to have a tubular shape by stacking a plurality of gypsum board pieces in a thickness direction and unitarily connecting the plurality of gypsum board pieces.2. The penetration part fireproof covering material according to claim 1 , wherein the plurality of gypsum board pieces are annular gypsum board pieces.3. The penetration part fireproof covering material according to claim 2 , wherein the plurality of gypsum board pieces are cut out from gypsum boards of thicknesses of 9.5 mm to 25.5 mm.4. The penetration part fireproof covering material according to claim 3 , wherein the plurality of gypsum board pieces are stacked and unitarily connected in such a manner that sheets of paper are attached to both sides of each gypsum board piece.5. The penetration part fireproof covering material according to claim 4 , wherein the plurality of gypsum board pieces are stacked and unitarily connected to ...

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Номер записи: 83
19-11-2015 дата публикации

CALCIUM SULPHATE-BASED PRODUCTS

Номер: US20150329423A1
Автор: Fisher Robin
Принадлежит:

This invention relates to improved high temperature resistant calcium sulphate-based products e.g. gypsum wallboard products and, in particular, to products having reduced shrinkage at high temperatures. The invention provides calcium sulphate-based product comprising gypsum and a shrinkage resistance additive. The shrinkage resistance additive is melamine polyphosphate or melamine pyrophosphate.

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Номер записи: 84
10-10-2019 дата публикации

Calcining kettle, calcining system, and method

Номер: US20190308906A1
Автор: Brock D. White, Jeffery C. White
Принадлежит: Tru-Flow Systems Inc

A calcining kettle includes an outer kettle shell, an inner kettle shell, an interior heat exchanger assembly defining at least one tortuous path inside a volume defined by the inner kettle shell, and an agitator within the inner kettle shell. The inner kettle shell is disposed within the outer kettle shell such that the inner kettle shell and the outer kettle shell together at least partially define a jacket adjacent the inner kettle shell. The inner kettle shell and the interior heat exchanger assembly at least partially define a processing volume. The agitator is configured to rotate at least one paddle to cause movement of a feedstock material within the processing volume. A heating device may be structured and adapted to circulate a heat transfer fluid in the at least one tortuous path and the jacket. Calcining methods are also disclosed.

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Номер записи: 85
24-11-2016 дата публикации

Method of Curing A Gypsum Calcination Product

Номер: US20160340244A1
Автор: Biguenet Cedric
Принадлежит:

A method of conditioning stucco comprises the steps of supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate hemihydrate and/or calcium sulphate anhydrite, as well as calcium sulphate dihydrate; and conditioning the stucco particles at a temperature of at least 100° C. and a humidity of at least 70%. During the step of conditioning the stucco particles, the bulk density of the stucco particles within the reaction vessel is at least 1 g/cm. 1. A method of conditioning stucco comprising the steps of:supplying a quantity of stucco particles to a reaction vessel, the stucco particles comprising calcium sulphate hemihydrate and/or calcium sulphate anhydrite, as well as calcium sulphate dihydrate; and {'sup': '3', 'wherein during the step of conditioning the stucco particles, the bulk density of the stucco particles within the reaction vessel is at least 1 g/cm.'}, 'conditioning the stucco particles at a temperature of at least 100° C. and a humidity of at least 70%,'}2. A method according to claim 1 , wherein the bulk density of the stucco particles within the reaction vessel is at least 1.5 g/cm.3. A method according to claim 1 , wherein the conditioning time of the stucco particles is at least 30 minutes claim 1 , preferably at least one hour.4. A method according to claim 1 , wherein the conditioning temperature is at least 130° C.5. A method according to claim 1 , wherein the pressure inside the reaction vessel during the step of conditioning the stucco particles is less than 2 bar.6. A method according to claim 1 , wherein the stucco particles supplied to the reaction vessel comprise calcium sulphate anhydrite.7. A method according to claim 6 , wherein the stucco particles supplied to the reaction vessel comprise calcium sulphate anhydrite III.8. A method according to claim 7 , wherein the stucco particles supplied to the reaction vessel comprise calcium sulphate anhydrite III in an amount of up to 70 wt %.9. ...

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Номер записи: 86
24-10-2019 дата публикации

METHOD FOR PRODUCING CALCIUM SULFATE

Номер: US20190322540A1
Автор: HENRY Thomas, THEYS Tibaut
Принадлежит: PRAYON TECHNOLOGIES

A method for preparing calcium sulphate comprising a production of DCP by the attack of a source of phosphate by an acid, a digestion of the isolated DCP by the sulphuric acid under conditions giving rise to the formation of a first slurry of gypsum suspended in an acidic aqueous phase having a content of free SOequal to or less than 1.5% and a content of free PO, a conversion of at least part of said first slurry by heating to a temperature greater than 80° C. and potentially by adding sulphuric acid, with solubilisation of the gypsum crystals and recrystallisation of the solubilised calcium sulphate in a second slurry of α-calcium sulphate hemihydrate crystals suspended in an aqueous phase based-on phosphoric acid, wherein the content of free SOis less than 10% by weight, and a separation between said aqueous phase and a filter cake based on particularly pure α-calcium sulphate hemihydrate. 1. A method for preparing calcium sulphate comprising the steps of: attack in an aqueous medium of a source of phosphate by an acid with the formation of a pulp comprising an aqueous phase containing water-soluble calcium phosphate and a solid phase containing impurities,', 'separation of the aqueous phase,', 'neutralisation neutralization of the latter by a neutralizing calcium compound with precipitation of said calcium monohydrogen phosphate in an aqueous solution, and', 'isolation of the precipitated calcium monohydrogen phosphate from said aqueous solution, and, 'producing calcium monohydrogen phosphate by{'sub': 2', '5, 'digesting the isolated calcium monohydrogen phosphate in an aqueous medium by sulphuric acid under conditions giving rise to the formation of a first slurry of calcium sulphate dihydrate crystals suspended in an acidic aqueous phase having a content of free PO,'}{'sub': '3', 'wherein digestion is carried out in order to obtain, in the first slurry, a content of free SOequal to or less than 1.5% by weight of the first slurry, and'} {'sub': '3', 'converting ...

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Номер записи: 87
24-10-2019 дата публикации

ACCELERATOR COMPRISING STARCH, AND RELATED BOARD, SLURRIES, AND METHODS

Номер: US20190322584A1
Автор: Barber James W., HEMPHILL Mark K., KIM Yongman, SANG Yijun
Принадлежит: UNITED STATES GYPSUM COMPANY

An accelerator for accelerating the rate of hydration of calcined gypsum is disclosed. The accelerator comprises calcium sulfate dihydrate particles and a starch. The starch has a cold water solubility of at least about 25% (e.g., at least about 35%) and a viscosity of about 25 Brabender Units (BU) or less when the starch is in a 30% aqueous slurry at 92° C. Also disclosed are a method of preparing an accelerator, method of hydrating stucco to form set gypsum, slurry, and method of making gypsum board. 1. An accelerator comprising particles of calcium sulfate dihydrate , and starch having a cold water solubility of at least about 25% and a viscosity of about 25 Brabender Units (BU) or less when the starch is in a 30% aqueous slurry at 92° C.2. The accelerator of claim 1 , wherein the particles of calcium sulfate dihydrate have an average particle size of from about 20 μm to about 50 μm.3. The accelerator of claim 1 , wherein the starch has a cold water solubility of at least about 35%.4. The accelerator of claim 3 , wherein the accelerator is prepared by co-grinding the calcium sulfate dihydrate in the presence of the starch.5. The accelerator of claim 4 , wherein the starch has an average particle size of from about 20 μm to about 100 μm prior to co-grinding.6. The accelerator of claim 4 , wherein the starch is present in an amount from about 1% to about 10% by weight of the accelerator.7. The accelerator of claim 4 , wherein the co-grinding occurs in a ball mill.8. The accelerator of claim 4 , wherein the co-grinding occurs for a period of from about 10 minutes to about 90 minutes.9. A method of preparing gypsum board comprising:(a) providing a first cover sheet;(b) mixing a slurry comprising stucco, water, and an accelerator comprising calcium sulfate dihydrate particles and starch having a cold water solubility of at least about 25% (e.g., at least about 35%), and a viscosity of about 25 Brabender Units (BU) or less when the starch is in a 30% aqueous starch ...

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Номер записи: 88
31-10-2019 дата публикации

PROCESS AND APPARATUS FOR CALCINATION OF GYPSUM

Номер: US20190330106A1
Автор: JOHANNSMANN Olaf, RUIZ Juan Jose, SCHULTE Rainer
Принадлежит: KNAUF GIPS KG

The invention pertains to a process for modifying gypsum, wherein

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Номер записи: 89
07-12-2017 дата публикации

POURABLE COMPOSITIONS

Номер: US20170349492A1
Автор: Intorcia Michael, Lettkeman Dennis
Принадлежит: UNITED STATES GYPSUM COMPANY

The invention provides a pourable composition comprising calcium sulfate hemihydrate; optionally, cement; one or more anionic surfactants selected from alkyl anionic surfactants, alkyl ether anionic surfactants, alkyl aryl anionic surfactants, and combinations thereof; one or more set accelerator additives; and water. 1. A pourable composition comprising calcium sulfate hemihydrate; optionally , cement; one or more anionic surfactants selected from alkyl anionic surfactants , alkyl ether anionic surfactants , alkyl aryl anionic surfactants , and combinations thereof; one or more set accelerator additives; and water.2. A pourable composition comprising between about 30 weight percent (wt. %) to about 65 wt. % calcium sulfate hemihydrate; optionally , between about 0 wt. % to about 10.0 wt. % cement; between about 0.025 wt. % to about 0.65 wt. % of one or more anionic surfactants selected from alkyl anionic surfactants , alkyl ether anionic surfactants , alkyl aryl anionic surfactants , and combinations thereof; and between about 0.1 wt. % to about 1.0 wt. % of one or more set accelerator additives; with the balance of the composition being water.3. The pourable composition according to wherein the calcium sulfate hemihydrate comprises calcium sulfate hemihydrate obtained by calcining calcium sulfate dehydrate claim 1 , synthetic calcium sulfate hemihydrate claim 1 , chemically modified calcium sulfate hemihydrate claim 1 , calcium sulfate α-hemihydrate claim 1 , calcium sulfate β-hemihydrate claim 1 , or a combination thereof.4. The pourable composition according to wherein the cement comprises Portland cement.5. The pourable composition according to wherein the Portland cement is Class C Portland cement claim 4 , Class B Portland cement claim 4 , or Type V Portland cement.6. The pourable composition according to wherein the Portland cement is Class C Portland cement.7. The pourable composition according to wherein the cement comprises Portland cement claim 1 , ...

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Номер записи: 90
06-12-2018 дата публикации

Air and Water Barrier Building Panels

Номер: US20180345532A1
Автор: Bailey Joseph J., Bland Brian, Iyer R. G., Randall Brian G., Stav Eli, Whittington Gene
Принадлежит:

A method for improving the air and/or water barrier performance of a building panel is disclosed. The building panel may be a gypsum board or cement board. In particular, the board may have improved resistance to bulk water penetration or permeation while maintaining breathability with respect to water vapor. 1. A method for improving the air and water barrier performance of a building panel , the method comprising:providing a first facing material,providing a board slurry on the first facing material,providing a second facing material on the board slurry, andproviding a hydrophobic material to the first facing material, the second facing material, or both.2. The method of claim 1 , wherein the hydrophobic material is applied to the second facing material after being placed on the board slurry wherein the hydrophobic material is applied on a side of the second facing material opposite a side adjacent the board slurry.3. The method of claim 1 , wherein the hydrophobic material is applied to the first facing material prior to providing the first facing material wherein the hydrophobic material is applied on a side of the first facing material opposite a side adjacent the board slurry.4. The method of claim 1 , wherein the hydrophobic material is provided in the board slurry which then migrates to the first facing material claim 1 , the second facing material claim 1 , or both.5. The method of claim 1 , wherein the hydrophobic material includes a polysiloxane.6. The method of claim 1 , wherein the hydrophobic material comprises a polymer coating.7. The method of claim 6 , wherein the polymer includes polytetrafluoroethylene or a polyolefin.8. The method of claim 1 , wherein the first facing material claim 1 , the second facing material claim 1 , or both have hydrophobic properties and further wherein a hydrophilic facing material is positioned between the first facing material claim 1 , the second facing material claim 1 , or both and the board slurry.9. A method for ...

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Номер записи: 91
29-12-2016 дата публикации

COMPOSITE GYPSUM BOARD AND METHODS RELATED THERETO

Номер: US20160375655A1
Автор: CHRIST Brian J., Diefenbacher Gregg G., Jones Fredrick T., LI Alfred C., SANG Yijun, SONG Weixin D., Todd Bradley W., Vilinska Annamaria
Принадлежит:

Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the board core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board. 1. A composite gypsum board comprising:(a) a board core comprising set gypsum formed from at least water, stucco, and optionally, an enhancing additive, the core having a dry density and dry thickness, the core defining first and second core faces in opposing relation; and (i) when the enhancing additive is present in forming the core, the enhancing additive is included in a higher concentration in forming the concentrated layer than in forming the board core, and', '(ii) the board core dry thickness is greater than a dry thickness of the concentrated layer., '(b) a concentrated layer formed from at least water, stucco, and the enhancing additive, the concentrated layer disposed in bonding relation to the first core face, the concentrated layer having a dry density of at least about 1.1 times higher than the dry density of the board core; wherein2. The composite gypsum board of claim 1 , wherein:the concentrated layer defines first and second concentrated layer faces,the board further comprises a top cover sheet, the first concentrated layer face facing the top cover sheet, andthe second concentrated layer face faces the first core face.3. The composite gypsum board of claim 1 , wherein the board further comprises a bottom cover sheet claim 1 , the second core face facing the bottom cover sheet.4. The composite gypsum board of claim 3 , wherein the top and/or bottom cover sheet has a thickness of at least about 0 ...

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Номер записи: 92
29-12-2016 дата публикации

COMPOSITE GYPSUM BOARD AND METHODS RELATED THERETO

Номер: US20160375656A1
Автор: CHRIST Brian J., Diefenbacher Gregg G., Jones Fredrick T., LI Alfred C., SANG Yijun, SONG Weixin D., Todd Bradley W., Vilinska Annamaria
Принадлежит:

Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the board core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board. 1. A method of making composite gypsum board , the method comprising:(a) preparing a first slurry comprising stucco, water and enhancing additive;(b) applying the first slurry in a bonding relation to a first cover sheet to form a concentrated layer, the concentrated layer having a first face and a second face, wherein the first concentrated layer face faces the first cover sheet;(c) mixing at least water, stucco, and optionally the enhancing additive to form a second slurry;(d) applying the second slurry in a bonding relation to the concentrated layer to form a board core having a first face and a second face, the first board core face facing the second concentrated layer face;(e) applying a second cover sheet in bonding relation to the second board core face to form a board precursor, and i. when the second slurry contains the enhancing additive, the enhancing additive is more concentrated in the first slurry than the second slurry, and', 'ii. when dried, the board core has a thickness greater than the thickness of the concentrated layer., '(f) drying the board precursor to form a board; wherein2. The method of claim 1 , wherein claim 1 , when dried claim 1 , the concentrated layer has a density of at least about 1.1 times higher than a density of the board core.3. The method of claim 2 , wherein a density differential between the concentrated layer and the board core is at least about 8 pcf (about 130 kg/m).4. ...

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Номер записи: 93
29-12-2016 дата публикации

COMPOSITE GYPSUM BOARD AND METHODS RELATED THERETO

Номер: US20160376191A1
Автор: CHRIST Brian J., Diefenbacher Gregg G., Jones Fredrick T., LI Alfred C., SANG Yijun, SONG Weixin D., Todd Bradley W., Vilinska Annamaria
Принадлежит:

Disclosed is a composite gypsum board comprising a board core and a concentrated layer of substantial thickness (e.g., at least about 0.02 inches). The concentrated layer includes a higher weight percentage of an enhancing additive than the hoard core. The board core has a thickness greater than the thickness of the concentrated layer and forms the bulk of the board volume. The concentrated layer has a higher density (e.g., at least about 1.1 times greater) than the density of the board core. Also disclosed is a method of preparing a composite gypsum board. 1. A composite gypsum board comprising:(a) a board core comprising set gypsum formed from at least water, stucco, and optionally, an enhancing additive, the core defining a first core face; and (i) when the enhancing additive is included in forming the board core, the enhancing additive is included in a higher concentration in forming the concentrated layer than in forming the board core,', '(ii) the board core has a thickness greater than the thickness of the concentrated layer, and', '(iii) the concentrated layer has an average core hardness that is at least about 1.5 times greater than the average core hardness of the board core., '(b) a concentrated layer thrilled from at least water, stucco, and the enhancing additive, the concentrated layer disposed in bonding relation to the first core face; wherein2. The composite gypsum board of claim 1 , wherein the concentrated layer is formed from at least about 1.2 times the enhancing additive used in forming the board core.3. The composite gypsum board of claim 1 , wherein the board has a density of about 33 pcf (about 530 kg/m) or less claim 1 , and the board has a nail pull resistance according to ASTM C473-10 claim 1 , Method B of at least about 68 lbs of force.4. The composite gypsum board of claim 1 , wherein the enhancing additive comprises starch.5. The composite gypsum board of claim 4 , wherein the starch comprises a pregelatinized starch having a viscosity ...

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Номер записи: 94
12-12-2019 дата публикации

Process To Convert Reduced Sulfur Species And Water Into Hydrogen And Sulfuric Acid

Номер: US20190376191A1
Автор: Cody E. FINKE
Принадлежит: California Institute of Technology CalTech

In an aspect, provided herein are methods for producing sulfuric acid and hydrogen gas, the methods comprising steps of: providing sulfur dioxide formed by thermal conversion of a sulfur-containing species; electrochemically oxidizing said sulfur dioxide to sulfuric acid in the presence of water; and electrochemically forming hydrogen gas via a reduction reaction. In some embodiments, the methods comprise a step of thermally converting said sulfur-containing species to said sulfur dioxide. Systems configured to perform these methods are also disclosed herein. Also provided herein are methods and systems for producing sulfuric acid and hydrogen gas by electrochemically forming the sulfuric acid and the hydrogen gas in a mixture comprising a sulfur material, a supporting acid, and water. Also provided herein are methods and systems for producing a cement material.

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Номер записи: 95
12-12-2019 дата публикации

Gypsum Panels, Systems, and Methods

Номер: US20190376286A1
Автор: Bradford Rochelle, Sanders Christopher J., Teng Yi-Hsien Harry, Thomas Vincent B.
Принадлежит:

Gypsum panels, sheathing systems, and methods of making and using the same are provided. A gypsum panel includes a gypsum core associated with a first fiberglass mat having a continuous barrier coating, the coating penetrating a portion of the first fiberglass mat opposite the gypsum core, wherein gypsum penetrates a remaining fibrous portion of the first fiberglass mat such that voids in the first fiberglass mat are substantially eliminated. A building sheathing system includes at least two gypsum panels and a seaming component to provide a seam at an interface between the gypsum panels. 1. A method of making a gypsum panel , comprising:depositing a gypsum slurry onto a surface of a first fiberglass mat opposite a continuous barrier coating that penetrates a portion of the first fiberglass mat; andallowing the gypsum slurry to set to form a gypsum core,wherein the gypsum slurry penetrates a remaining fibrous portion of the first fiberglass mat such that voids in substantially all of an interstitial volume of the first fiberglass mat that is not filled by the coating are substantially eliminated, andwherein the gypsum panel passes a hydrostatic head test against water leakage, as measured by AATCC 127-2008.2. The method of claim 1 , wherein:depositing the gypsum slurry comprises depositing a first gypsum slurry onto the surface of the first fiberglass mat, the first gypsum slurry having a density of from about 88 pcf to about 98 pcf, andallowing the gypsum slurry to set comprises allowing the first gypsum slurry to set to form at least a portion of the gypsum core.3. The method of claim 2 , wherein the first gypsum slurry comprises a wetting agent in an amount effective to reduce a surface tension of the first gypsum slurry to from about 30 dyne/cm to about 55 dyne/cm.4. The method of claim 3 , wherein the wetting agent is selected from a group consisting of surfactants claim 3 , superplasticisers claim 3 , dispersants claim 3 , agents containing surfactants claim 3 ...

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Номер записи: 96
10-12-2020 дата публикации

IMPROVEMENT OF STUCCO PROPERTIES THROUGH AGING AT ELEVATED TEMPERATURES AND HIGH HUMIDITY LEVEL

Номер: US20200385309A1
Автор: Baier Manfred, Dietz Stephan, Förthner Sebastian, Fraser Thomas, Hartmann Alexander, Karakoussis Stergios, Paraskov Georgi, Schneiderbanger Reiner
Принадлежит:

The invention pertains to a method for stabilizing stucco wherein 1. Method for stabilizing stucco whereina fresh stucco is provided;water is added to the fresh stucco to obtain moistened stucco, andthe moistened stucco is maintained at a temperature of at least 30° C. for a time interval of at least 30 min to obtain a stabilized stucco.2. Method according to claim 1 , wherein water is added to the fresh stucco in an amount such that the stabilized stucco contains free moisture in an amount of 0.2 to 5 wt. % claim 1 , preferably of 0.5 to 1.5 wt. % based on the weight of the stabilized stucco.3. Method according to claim 1 , wherein the water is provided in vapor form.4. Method according to claim 1 , wherein the fresh stucco is provided at room temperature.5. Method according to claim 1 , wherein the fresh stucco is heated to a temperature of at least 30° C. before addition of water.6. Method according to claim 1 , wherein the moistened stucco is maintained under an atmosphere of at least 50% rel. humidity.7. Method according to claim 1 , wherein the moistened stucco is maintained at a temperature of at least 40° C. for a time period of less than 48 hours.8. Method according to claim 1 , wherein a particle size D98 of the stabilized stucco is adjusted to less than 1 mm.9. Method according to claim 1 , wherein the stabilized stucco is ground.10. Method according to claim 1 , wherein the stabilized stucco is mixed with fresh stucco.11. Method for producing gypsum plasterboards claim 1 , at least comprising the following steps:providing a stabilized stucco;preparing a stucco slurry by addition of water to the stabilized stucco;forming the stucco slurry to obtain a gypsum plasterboard.12. Method according to claim 11 , wherein a foam is added to the stucco slurry.13. Method according to claim 12 , wherein the foam is unstable foam.14. Method according to claim 12 , wherein the foam is stable foam and a defoamer is added to the stucco slurry.15. Use of stabilized stucco ...

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Номер записи: 97
24-12-2020 дата публикации

Construction Panel Having Improved Fixing Strength and Method for the Manufacture Thereof

Номер: US20200399176A1
Автор: Adam Richardson, Glen Hotchin, Nicholas Jones
Принадлежит: Saint Gobain Placo Sas

A plasterboard comprises a gypsum matrix having fibres embedded therein. The plasterboard optionally has a backing lamina attached to one of the faces thereof. The gypsum matrix of the plasterboard optionally comprises a polymeric additive.

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Номер записи: 98
26-10-1971 дата публикации

Batch-continuous reactor

Номер: US3615253A
Автор: Fred M Warzel
Принадлежит: Phillips Petroleum Co

Material increases in throughput and output of batch-type reactors are obtained by avoiding operational time losses in dumping and filling and startup. The improvements are achieved by a flexible divider which extends upwards from the bottom of the unit and which moves from one side of the reactor to the other to increase and decrease, respectively, the volumes of the sections of the reactor. One section can be functional while the other section is being emptied and refilled. The combined output of the sections approaches the output of a continuous reactor.

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Номер записи: 99
12-11-2009 дата публикации

Calcination method and system

Номер: WO2009135688A1
Автор: Peter Hilgraf, Volker GÖCKE
Принадлежит: Claudius Peters Technologies Gmbh

The invention relates to a method for the calcination of powdery or fine-particled plaster, comprising two steps: the plaster is subjected to a flash-calcination in a calcinator (3) and the hot plaster is post-calcinated in a reaction vessel (6). According to the invention, post-calcination is carried out in the reaction vessel (6) by adding humid gas, said reaction vessel (6) not being heated. Said post-calcination takes place over a long period of time, that is at least 10 times, preferably 50 - 100 times longer than the amount of time taken for flash calcination. Said invention enables complete calcination to take place without expending additional energy, and the remaining dihydrate produced during the flash calcination is also transformed into semi-hydrate and undesired anhydrite fractions are reduced. Said method ensures consistency in the product quality and also increases product quality. The temperature in the upstream calcinator (3) can be lowered thus saving more energy. Said invention can also be used to accelerate the ageing of calcinated plaster.

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Номер записи: 100