公开(公告)号：WO2012087608A1

公开(公告)日：2012-06-28

申请号：PCT/US2011/064118

申请日：2011-12-09

Applicant: UNITED STATES GYPSUM COMPANY ,  VEERAMASUNENI, Srinivas ,  YU, Qiang

Inventor： VEERAMASUNENI, Srinivas ,  YU, Qiang

IPC: C04B28/14

CPC classification number: C04B28/145 ,  C04B2103/12 ,  C04B22/16

Abstract: In a first embodiment of the invention, aged brushite is combined with calcium sulfate hemihydrate and water to make a gypsum slurry. Aged brushite slurry behaves similarly to calcium sulfate dihydrate to act as a seed crystal and rapidly initiate crystallization. The brushite slurry does not require the addition of a coating to maintain its activity over time compared to calcium sulfate dihydrate set accelerators. A gypsum-based product made using brushite slurry as the set accelerator is a second embodiment. The product has the brushite molecules integrated as part of the calcium sulfate dihydrate matrix and is distributed throughout the matrix.

Abstract translation: 在本发明的第一个实施方案中，将老化的白泥与半水合硫酸钙和水混合以制备石膏浆料。 老化的水泥浆浆体的作用类似于硫酸钙二水合物作为晶种，并迅速引发结晶。 与硫酸钙二水合物凝固加速器相比，该悬浮液不需要添加涂层以保持其随时间的活性。 作为第二实施方式的使用石灰浆作为凝固加速剂的石膏制品是第二实施方式。 该产品具有整合作为硫酸钙二水合物基质的一部分的分散在整个基质中的白云石分子。

公开(公告)号：WO2008154082A1

公开(公告)日：2008-12-18

申请号：PCT/US2008/061978

申请日：2008-04-30

Applicant: UNITED STATES GYPSUM COMPANY ,  MILLER, David, Paul ,  LIU, Qingxia ,  YU, Qiang

Inventor： MILLER, David, Paul ,  LIU, Qingxia ,  YU, Qiang

IPC: B32B13/00

CPC classification number: C04B28/14 ,  B28B5/027 ,  B28B17/0081 ,  B28B17/023 ,  C04B24/383 ,  C04B2111/0062 ,  C04B38/106

Abstract: A method for forming a gypsum slurry comprises the steps of combining gypsum and water to form a slurry, combining cellulose ether with at least a second material configured to delay solubilization of the cellulose ether, and adding the combined cellulose ether and at least a second material to the slurry.

Abstract translation: 用于形成石膏浆料的方法包括以下步骤：将石膏和水混合以形成浆料，将纤维素醚与配置成延迟纤维素醚溶解度的至少第二材料结合，并加入组合的纤维素醚和至少第二种材料 到浆料。

公开(公告)号：WO2006135613A2

公开(公告)日：2006-12-21

申请号：PCT/US2006/022014

申请日：2006-06-07

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： YU, Qiang ,  LYNN, Michael, R. ,  SONG, Weixin, D. ,  LIU, Qingxia ,  SHAKE, Michael, P. ,  JONES, Frederick, T.

IPC: C04B28/14 ,  C04B11/00

CPC classification number: C04B28/14 ,  C04B2111/0062 ,  Y02W30/97 ,  C04B22/16 ,  C04B24/226 ,  C04B14/42 ,  C04B18/241 ,  C04B2103/408

Abstract: The invention generally provides gypsum-containing slurries including stucco, trimetaphosphate salt, and naphthalenesulfonate dispersant, wherein the trimetaphosphate salt is present in an amount of at least about 0.12% by weight based on the weight of stucco. Other slurry additives can include accelerators, binders, starch, and 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.

Abstract translation: 本发明通常提供包括灰泥，三偏磷酸盐和萘磺酸盐分散剂的含石膏的浆料，其中三偏磷酸盐的存在量为灰泥重量的至少约0.12重量％。 其它浆料添加剂可包括促进剂，粘合剂，淀粉和纸纤维，玻璃纤维和其它已知成分。 本发明还包括用这种浆料制成的含石膏的产品，例如石膏墙板，以及制造石膏墙板的方法。

公开(公告)号：WO2012116325A1

公开(公告)日：2012-08-30

申请号：PCT/US2012/026613

申请日：2012-02-24

Applicant: UNITED STATES GYPSUM COMPANY ,  YU, Qiang ,  LUAN, Wenqi ,  SONG, Weixin D. ,  VEERAMASUNENI, Srinivas ,  LI, Alfred

Inventor： YU, Qiang ,  LUAN, Wenqi ,  SONG, Weixin D. ,  VEERAMASUNENI, Srinivas ,  LI, Alfred

IPC: C04B20/06 ,  C04B28/14

CPC classification number: E04C2/04 ,  B28B1/50 ,  B28B11/12 ,  B28B11/243 ,  B32B5/16 ,  B32B9/005 ,  B32B38/164 ,  B32B2307/3065 ,  B32B2607/00 ,  C04B20/06 ,  C04B28/14 ,  C04B28/145 ,  C04B2111/0062 ,  C04B2111/28 ,  C04B2201/30 ,  E04B1/942 ,  Y10T428/249968 ,  Y10T428/249979 ,  Y10T428/26 ,  Y10T428/31971 ,  C04B14/386 ,  C04B14/42 ,  C04B14/46 ,  C04B20/0024 ,  C04B22/16 ,  C04B24/38 ,  C04B38/0054 ,  C04B38/106 ,  C04B2103/408 ,  C04B14/202

Abstract: A reduced weight, reduced density gypsum panel that includes high expansion vermiculite with fire resistance capabilities that are at least comparable to (if not better than) commercial fire rated gypsum panels with a much greater gypsum content, weight and density.

Abstract translation: 减重密度石膏板，包括具有耐火能力的高膨胀蛭石，其至少与具有更大石膏含量，重量和密度的商业防火石膏板相当（如果不是更好）。

公开(公告)号：WO2010027920A3

公开(公告)日：2010-03-11

申请号：PCT/US2009/055383

申请日：2009-08-28

Applicant: UNITED STATES GYPSUM COMPANY ,  YU, Qiang ,  SCHENCK, Ron ,  DIGENNARO, Salvatore ,  FOLSON, Stephen ,  HENRY, Kevin ,  GUINED, Tim

Inventor： YU, Qiang ,  SCHENCK, Ron ,  DIGENNARO, Salvatore ,  FOLSON, Stephen ,  HENRY, Kevin ,  GUINED, Tim

IPC: B28C7/04 ,  B01F3/12 ,  B28C1/02 ,  E04C2/26 ,  C04B28/16

Abstract: The present invention provides a wet starch preparation system for gypsum wallboard comprising a loss-in-weight starch feeder, a venturi mixer, a vacuum pick-up unit for supplying the dry starch from the feeder at an adjustable rate to the venturi mixer, a first water pump for supplying water at an adjustable rate to the venturi mixer to form a starch pre-dispersion of from about 2% to about 10% by weight starch and a second water pump for supplying gauging water to the starch pre-dispersion, the system equipped with appropriate system controls. The present system provides more efficient use of starch such that the amount of pregelatinized starch is at least about 10% less than a system in which the starch is not pre-dispersed in water prior to the board mixer. The system can be used to make gypsum-containing products including gypsum wallboard having increased board strength and reduced board weight.

公开(公告)号：WO2008036160A3

公开(公告)日：2008-03-27

申请号：PCT/US2007/018558

申请日：2007-08-22

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： YU, Qiang

IPC: C01F11/46

Abstract: A process is disclosed for making a blend of alpha- and beta-stucco including a slurry calcination step to produce alpha calcium sulfate hemihydrate followed by a fluidized bed calcination step to produce beta calcium sulfate hemihydrate. The process starts with 50-75% gypsum-containing solids slurry, and then steam calcines the slurry in a first reactor to form partially calcined gypsum slurry which contains calcium sulfate dihydrate and alpha calcium sulfate hemihydrate. The partially calcined slurry is then dewatered. Then the filter cake is fed into a kettle to complete the calcination process by converting the calcium sulfate dihydrate of the filter cake material into beta calcium sulfate hemihydrate.

公开(公告)号：WO2004087604A3

公开(公告)日：2004-10-14

申请号：PCT/US2004/008927

申请日：2004-03-24

Applicant: UNITED STATES GYPSUM COMPANY ,  LIU, Qingxia ,  NATESAIYER, Kumar ,  YU, Qiang

Inventor： LIU, Qingxia ,  NATESAIYER, Kumar ,  YU, Qiang

IPC: C04B28/14

Abstract: A ready-mixed composition, which sets when mixed with an activator for the reaction of calcined gypsum with water to form set gypsum, is disclosed. The composition comprises water and calcined gypsum in a weight ratio of water to calcined gypsum of from about 0.15 to about 0.5, as well as a set preventer comprising a polyacrylic acid and/or a salt thereof. The composition has a viscosity of from about 5,000 centipoise to about 48,000 centipoise. Also disclosed is a kit that comprises separately packaged components. One of the components is a composition comprising calcined gypsum and a polyacrylic acid and/or a salt thereof, and, optionally, water. Another component of the kit comprises an activator which, when mixed with the composition, permits the composition to set.

公开(公告)号：WO2009058558A1

公开(公告)日：2009-05-07

申请号：PCT/US2008/079903

申请日：2008-10-15

Applicant: UNITED STATES GYPSUM COMPANY ,  YU, Qiang ,  TRACY, Sharon, L.

Inventor： YU, Qiang ,  TRACY, Sharon, L.

IPC: B32B3/00 ,  C04B9/00

CPC classification number: C04B28/14 ,  B32B13/08 ,  B32B17/02 ,  B32B27/02 ,  B32B29/00 ,  C04B2111/0062 ,  C04B2111/40 ,  Y10T428/249968 ,  C04B22/16 ,  C04B24/226 ,  C04B24/383 ,  C04B2103/408

Abstract: The invention generally provides gypsum-containing slurries including stucco, a hydroxyethylated starch, naphthalenesulfonate dispersant, and sodium trimetaphosphate. The naphthalenesulfonate dispersant is present in an amount of about 0.1 % - 3.0% by weight based on the weight of dry stucco. The hydroxyethylated starch is present in an amount of from about 0.5% by weight to about 10% by weight based on the weight of dry stucco in the formulation. The sodium trimetaphosphate is present in an amount of about 0.1 % - 0.4% by weight based on the weight of dry stucco. Other slurry additives can include accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, lightweight gypsum wallboard, and a method of making lightweight gypsum wallboard.

Abstract translation: 本发明通常提供含石灰的浆料，羟乙基化淀粉，萘磺酸盐分散剂和三偏磷酸钠。 萘磺酸盐分散剂的存在量为干灰泥重量的约0.1％-3.0％（重量）。 羟乙基化淀粉的存在量为制剂中干灰泥重量的约0.5重量％至约10重量％。 基于干灰泥的重量，三偏磷酸钠的存在量为约0.1重量％至0.4重量％。 其它浆料添加剂可以包括促进剂，粘合剂，纸纤维，玻璃纤维和其它已知成分。 本发明还包括用这种浆料制成的含石膏的产品，例如轻质石膏墙板，以及制造轻质石膏墙板的方法。

公开(公告)号：WO2008105994A1

公开(公告)日：2008-09-04

申请号：PCT/US2008/001545

申请日：2008-02-06

Applicant: UNITED STATES GYPSUM COMPANY ,  MILLER, David, Paul ,  LIU, Qingxia ,  YU, Qiang

Inventor： MILLER, David, Paul ,  LIU, Qingxia ,  YU, Qiang

IPC: B32B13/00

CPC classification number: B28C7/024 ,  B01F3/1221 ,  B01F3/1228 ,  B01F7/00766 ,  B28B19/0092 ,  B28C5/381 ,  B28C7/0418 ,  C04B28/14 ,  C04B2111/0062 ,  C04B24/383 ,  C04B38/10 ,  C04B40/0032 ,  C04B40/006

Abstract: An example system for making a gypsum board product comprises a container for containing a gypsum slurry, a moving receiver in communication with the container, wherein the container substantially continuously deposits the gypsum slurry on the moving receiver. A first and at least a second cellulose ether supply containing a first cellulose ether communicate with the container. The first and second supplies contain cellulose ethers having different physical or chemical properties. A controller is configured to change the amount of the first and second cellulose ethers delivered to the container in response to a change in at least one slurry physical property.

Abstract translation: 用于制造石膏板产品的示例性系统包括用于容纳石膏浆料的容器，与容器连通的移动接收器，其中容器基本上将石膏浆料沉积在移动的接收器上。 含有第一纤维素醚的第一和至少第二纤维素醚供应源与容器连通。 第一和第二供应品含有具有不同物理或化学性质的纤维素醚。 控制器被配置为响应于至少一种浆料物理性质的变化而改变输送到容器中的第一和第二纤维素醚的量。

公开(公告)号：WO2008045217A2

公开(公告)日：2008-04-17

申请号：PCT/US2007/020906

申请日：2007-09-28

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： YU, Qiang ,  JONES, Frederick, T. ,  LIU, Qingxia

IPC: B32B37/00

CPC classification number: E04C2/043 ,  C04B28/14 ,  C04B2111/0062 ,  C04B2111/28 ,  C04B2111/285 ,  C04B2111/34 ,  E04F13/04 ,  Y02W30/94 ,  Y10T428/23 ,  Y10T428/231 ,  Y10T428/232 ,  Y10T428/233 ,  Y10T428/234 ,  Y10T428/236 ,  Y10T428/237 ,  C04B14/024 ,  C04B14/043 ,  C04B14/08 ,  C04B14/10 ,  C04B14/20 ,  C04B14/202 ,  C04B14/42 ,  C04B18/146 ,  C04B22/143 ,  C04B40/0028

Abstract: A method of continuously forming a multilayer panel includes making a gypsum slurry, then dividing the gypsum slurry into at least a primary gypsum slurry and a secondary gypsum slurry. An additive slurry having water and an intumescent material is created, then added to the secondary gypsum slurry to make an expandable layer slurry that is spread over at least a portion of a facing material. The primary gypsum slurry is distributed over the secondary gypsum slurry over the facing material and the expanding layer slurry to form a core. Optionally, another layer, an edge coating, is applied to the expanding layer for additional fire protection. The edge coating includes a second intumescent material. During a fire, the expanding layer expands to increase the thickness of the fire exposed gypsum panel and the edge coating expands to seal the gap between adjoining gypsum panels.

Abstract translation: 连续地形成多层板的方法包括制备石膏浆料，然后将石膏浆料分成至少一种初级石膏浆料和二级石膏浆料。 产生具有水和膨胀材料的添加剂浆料，然后加入到二次石膏浆料中以制成分散在至少一部分面向材料上的可膨胀层浆料。 主要石膏浆料分布在面向材料和膨胀层浆料上的次级石膏浆料上以形成核心。 可选地，将另一层，边缘涂层施加到扩展层以用于额外的防火。 边缘涂层包括第二膨胀材料。 在火灾期间，膨胀层膨胀以增加防火露石膏板的厚度，并且边缘涂层膨胀以密封相邻的石膏板之间的间隙。