公开(公告)号：US10781139B2

公开(公告)日：2020-09-22

申请号：US15914633

申请日：2018-03-07

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Renee J. Weinberger ,  Runhai Lu ,  Yijun Sang ,  Guy L. Rosenthal

IPC: C04B26/00 ,  C04B26/28 ,  C04B14/28 ,  C08B31/06 ,  C08L3/14 ,  C08L1/28 ,  C09J103/08 ,  C08L3/08 ,  C08B31/12 ,  C04B22/00 ,  C04B103/44 ,  C04B111/00

Abstract: Provided herein is a joint compound having a composition to allow tools to easily clean up, comprising water, at least one inert filler, and a binder comprising a sulfonated starch, and a method of preparing the joint compound.

公开(公告)号：US11186067B2

公开(公告)日：2021-11-30

申请号：US16401719

申请日：2019-05-02

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Qinghua Li ,  Runhai Lu ,  Charles W. Cochran ,  Mark Hemphill

IPC: B32B13/08 ,  B32B29/06 ,  B32B29/00 ,  B32B3/26 ,  C04B28/14 ,  C04B111/00

Abstract: Gypsum boards formed from synthetic gypsum and other gypsum sources having high chloride salt concentrations. Gypsum boards may include a board core including set gypsum. A total concentration of the chloride anion in the board core ranges from about 500 ppm to about 3000 ppm, typically about 1000 ppm to about 3000 ppm, based on weight of the calcium sulfate hemihydrate. An inner surface of a front paper cover sheet contacts a first face of the board core. An inner surface of a back paper cover sheet contacts a second face of the board core. A starch layer coats the inner surface of at least one of the front and back cover sheet. Methods of making the gypsum board, and a wall system for employing the gypsum boards, are also provided.

公开(公告)号：US10737979B2

公开(公告)日：2020-08-11

申请号：US15918449

申请日：2018-03-12

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Runhai Lu ,  Yijun Sang ,  Weixin D. Song

IPC: C04B22/14 ,  C04B28/14 ,  C04B24/22 ,  C04B22/16 ,  C04B18/24 ,  C04B24/38 ,  C04B20/02 ,  C04B40/00 ,  C04B111/00 ,  C04B103/12 ,  C04B103/52

Abstract: A modified gypsum set accelerator and a method of preparing the same is provided, which includes dry loose finely ground particles of a mixture of ground dry calcium sulfate dihydrate and a grinding aid selected from one or more of beta-naphthalene sulfonate formaldehyde condensate, trimetaphosphate phosphate salt, tripolyphosphate salt, tetra-pyrophosphate salt, and pregelatinized starch.

公开(公告)号：US20190062215A1

公开(公告)日：2019-02-28

申请号：US15971766

申请日：2018-05-04

Applicant: United States Gypsum Company

Inventor： Runhai Lu ,  Yijun Sang ,  Kyle Lucas

IPC: C04B28/14 ,  C04B24/26 ,  C04B24/38 ,  B32B13/08

Abstract: Disclosed is gypsum board with good strength, as well as gypsum slurries, methods, and cover sheets. Board is formed using one or more of starch, electrolyte, and/or hydrophilic material. These strength ingredients can be applied onto a cover sheet before contacting a gypsum slurry used in forming a gypsum layer in the board, and/or can be incorporated into the gypsum slurry used for forming one or more gypsum layers in the board, e.g., the board core and/or a concentrated gypsum layer between the core and one or both cover sheets.