公开(公告)号：US20170334778A1

公开(公告)日：2017-11-23

申请号：US15588756

申请日：2017-05-08

Applicant: United States Gypsum Company

Inventor： Annamaria Vilinska ,  Alfred C. Li ,  Mario Dupuis ,  Iordana Triantafillu ,  Francis Loiseau

IPC: C04B24/26 ,  C04B28/14 ,  C04B24/38 ,  C04B14/10 ,  B32B13/08 ,  C04B103/40

Abstract: A gypsum slurry includes water, a hydraulic component including calcium sulfate hemihydrate and a linear polycarboxylate dispersant. The linear polycarboxylate anionic dispersant includes a first monomeric repeating unit and a second monomeric repeating unit. The first repeating unit of the linear polycarboxylate dispersant is an olefinic unsaturated carboxylic acid repeating unit or salt thereof. The second repeating unit of the linear polycarboxylate dispersant is a vinyl sulfonate. The slurry can be made into a gypsum panel. Methods of making gypsum slurry and a gypsum panel are also disclosed.

公开(公告)号：US20170152177A1

公开(公告)日：2017-06-01

申请号：US15431444

申请日：2017-02-13

Applicant: United States Gypsum Company

Inventor： Annamaria Vilinska ,  Alfred C. LI ,  Weixin D. SONG

IPC: C04B24/16 ,  C04B24/32 ,  B28B17/00 ,  C04B38/10 ,  C04B24/38 ,  B28B1/50 ,  C04B28/14 ,  C04B24/02

CPC classification number: C04B28/14 ,  B28B19/0092 ,  B28C5/06 ,  B28C5/1269 ,  B28C7/0413 ,  B28C7/0418 ,  B32B3/26 ,  B32B5/20 ,  B32B5/245 ,  B32B13/02 ,  B32B13/04 ,  B32B13/08 ,  B32B13/14 ,  B32B2250/03 ,  B32B2250/40 ,  B32B2262/101 ,  B32B2262/105 ,  B32B2264/10 ,  B32B2264/102 ,  B32B2266/049 ,  B32B2307/304 ,  B32B2307/3065 ,  B32B2307/536 ,  B32B2307/546 ,  B32B2307/7145 ,  B32B2307/718 ,  B32B2307/72 ,  B32B2307/728 ,  B32B2307/732 ,  B32B2607/02 ,  C04B28/02 ,  C04B38/106 ,  C04B2103/48 ,  C04B2111/0062 ,  E04C2/049 ,  C04B24/026 ,  C04B24/16 ,  C04B38/0054 ,  C04B38/0067 ,  C04B38/007 ,  C04B24/383 ,  C04B14/42 ,  C04B2103/20 ,  C04B2103/40 ,  C04B24/2647

Abstract: Disclosed is a method and system for blending a foam modifier with foaming agent online, e.g., as may be particularly useful for gypsum or cement slurries. The foam modifier comprises a fatty alcohol that is added to a gypsum or cement slurry that includes foaming agent, such as an alkyl sulfate surfactant. The fatty alcohol can be a C6-C16 fatty alcohol in some embodiments. The use of such a foam modifier can be used, for example, to stabilize the foam, reduce waste of foaming agent, improve void size control in the final product, and improve the gypsum board manufacturing process.

公开(公告)号：US20160375656A1

公开(公告)日：2016-12-29

申请号：US15186212

申请日：2016-06-17

Applicant: United States Gypsum Company

Inventor： Alfred C. Li ,  Weixin D. Song ,  Yijun Sang ,  Gregg G. Diefenbacher ,  Annamaria Vilinska ,  Brian J. Christ ,  Fredrick T. Jones ,  Bradley W. Todd

IPC: B32B13/02 ,  C04B24/38 ,  B32B13/08 ,  C04B11/00 ,  B32B13/04 ,  B32B7/02

Abstract: 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.