公开(公告)号：US20230357085A1

公开(公告)日：2023-11-09

申请号：US18158088

申请日：2023-01-23

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Qinghua LI ,  Rafael BURY

IPC: C04B28/14 ,  C04B22/12 ,  C04B24/38 ,  C04B22/16 ,  D21H19/12 ,  E04C2/04 ,  B32B13/08 ,  B32B37/15 ,  B32B37/24

CPC classification number: C04B28/14 ,  C04B22/124 ,  C04B24/38 ,  C04B22/16 ,  D21H19/12 ,  E04C2/043 ,  B32B13/08 ,  B32B37/15 ,  B32B37/24 ,  C04B2111/0062

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 between a front cover sheet and a back cover sheet. A total concentration of the chloride anion in the board core ranges from about 150 to 4000 parts by weight (pbw) chloride, typically about 300 to about 3000 pbw, more typically from about 400 to about 2000 pbw, further typically from about 1000 to about 2000 pbw, and further typically from about 600 to about 1000 pbw, per 1,000,000 pbw calcium sulfate dihydrate. A polymer layer contacts an inner surface of the back cover sheet. A densified gypsum layer contacts an inner surface of the front 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：US20190010713A1

公开(公告)日：2019-01-10

申请号：US15642985

申请日：2017-07-06

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Robert H. NEGRI ,  Aaron ST. JAMES ,  Elliott ST. JAMES ,  Bernie ST. JAMES ,  David J. PEKARCIK ,  Jeffrey Samuel ZUNK ,  Rafael BURY ,  Pamela HARGROVE

IPC: E04F21/165

Abstract: A prefill tool for finishing wallboard joints is provided for finishing a wallboard joint, and includes a box assembly defining a hopper, having a top wall and a front wall constructed and arranged for engaging the wallboard joint. The front wall partially defines a gate dimensioned for dispensing joint compound stored in the hopper. Also, the gate is located on a skid plate mounted on the front wall, the skid plate having a main portion, and a gate portion partially defining the gate being displaced from a plane defined by the main portion.

公开(公告)号：US20190330846A1

公开(公告)日：2019-10-31

申请号：US16371722

申请日：2019-04-01

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： Yanfei PENG ,  Rafael BURY ,  Jeffrey W. DONELAN

IPC: E04C2/04 ,  B32B13/12 ,  B32B27/20 ,  C04B28/04 ,  C04B28/14

Abstract: Mat-faced cementitious board including: (a) a cementitious core; (b) a fibrous mat having an inner first surface facing at least one face of the cementitious core, and an outer second surface, wherein the inner first surface and the outer second surface are opposed; (c) a hydrophobic, non-setting coating resulting from applying to the outer second surface of the fibrous mat a layer of hydrophobic finish composition including: (i) about 50 to about 80 weight % non-setting, inorganic filler having a mean particle diameter of about 12 microns to about 35 microns, (ii) about 20% to about 50 weight % an aqueous dispersion of a film-forming polymer, (iii) 0% to about 30 weight % additional water; (iv) an absence of fly ash, (v) an absence of pozzolanic material, (vi) an absence of hydraulic cement, (vii) an absence of calcium sulfate hemihydrate, and (viii) an absence of calcium sulfate anhydrite.