公开(公告)号：WO2021148365A1

公开(公告)日：2021-07-29

申请号：PCT/EP2021/050979

申请日：2021-01-19

Applicant: SIKA TECHNOLOGY AG

Inventor： MUTHS-KERN, Denise ,  SAHINAGIC, Rasid ,  HAMPEL, Christina ,  ZIMMERMANN, Jörg ,  JAGIELSKI, Nicole

IPC: C04B28/04 ,  C04B28/06 ,  C04B28/10 ,  C04B28/14 ,  C04B28/16 ,  C04B40/00 ,  C04B103/40 ,  C04B2103/0058 ,  C04B2103/408 ,  C04B28/065 ,  C04B28/145 ,  C04B40/0042

Abstract: Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Herstellung von pulverförmigen Dispergiermitteln umfassend mindestens 90 Gew.-% mindestens eines Copolymeren CP vom Typ Polycarboxylatether. Die pulverförmigen Dispergiermittel können in Wasser einfach dispergiert werden. Die vorliegende Erfindung bezieht sich auch auf die Verwendung solcher pulverförmigen Dispergiermittel in mineralischen Bindemittelzusammensetzungen, insbesondere Trockenmörteln, Beton oder Gipsformulierungen.

公开(公告)号：WO2021197866A1

公开(公告)日：2021-10-07

申请号：PCT/EP2021/056978

申请日：2021-03-18

Applicant: SIKA TECHNOLOGY AG

Inventor： SOUDIER, Jerome ,  BEN HARRATH, Alexandre

IPC: C04B28/08 ,  C04B2103/0042 ,  C04B2111/00637 ,  C04B2111/00646 ,  C04B2111/00663 ,  C04B2111/00715 ,  C04B2111/27 ,  C04B2111/34 ,  C04B2111/60 ,  C04B2111/62 ,  C04B2111/70 ,  C04B2111/72 ,  C04B28/145 ,  C04B28/16 ,  C04B28/26

Abstract: The present invention belongs to the field of hydraulically setting compositions comprising steel making slag. Specifically, the present invention provides a method for controlling the volume expansion of a hydraulically setting composition comprising steel making slag, said method including a step of adding a silica source to said composition. Furthermore, the present invention also provides hydraulically setting compositions obtained by such methods and their uses.

公开(公告)号：WO2021133463A1

公开(公告)日：2021-07-01

申请号：PCT/US2020/058100

申请日：2020-10-30

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： LI, Qinghua ,  HEMPHILL, Mark K. ,  CHRIST, Brian J. ,  LORING, Curtis B.

IPC: B32B3/26 ,  B32B5/14 ,  B32B5/20 ,  B32B13/08 ,  B32B29/00 ,  D21H19/54 ,  E04C2/04 ,  C04B24/38 ,  B32B2038/166 ,  B32B2250/02 ,  B32B2250/03 ,  B32B2250/26 ,  B32B2255/12 ,  B32B2255/20 ,  B32B2260/044 ,  B32B2307/536 ,  B32B2307/546 ,  B32B2307/72 ,  B32B2307/722 ,  B32B2607/00 ,  B32B29/002 ,  B32B29/005 ,  B32B3/266 ,  B32B38/0036 ,  B32B43/003 ,  B32B5/145 ,  C04B2111/0062 ,  C04B28/14 ,  C04B28/145 ,  D21H17/28 ,  D21H27/30 ,  E04C2/043

Abstract: Disclosed are a composite gypsum board and a method of preparing gypsum board. The board contains at least one set gypsum layer sandwiched between face and back cover sheets. The set gypsum layer is formed from at least stucco and water. The stucco material generally includes a high salt impurity content, for example, when the stucco is calcined from certain sources of low-quality synthetic gypsum. For example, in some embodiments, the salts are chloride salts, e.g., sodium chloride (NaCl), potassium chloride (KCl), magnesium chloride (MgCl2), and/or calcium chloride (CaCl2). The board and methods improve the bond between the gypsum layer(s) and at least one of the cover sheets (e.g., the back cover sheet). Also provided are methods and systems relating to drying gypsum board.

公开(公告)号：WO2023044382A1

公开(公告)日：2023-03-23

申请号：PCT/US2022/076483

申请日：2022-09-15

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： NIESSNER, Karl Glenn ,  LETTKEMAN, Dennis Mark ,  WILSON, John Wesley ,  BEDWELL, William Kelly

IPC: C04B28/14 ,  C04B111/60 ,  C04B2103/0082 ,  C04B2111/60 ,  C04B28/145

Abstract: This disclosure provides gypsum cement compositions which comprise an aggregate stabilizing mixture containing a combination of a polysaccharide gum and a polyacrylamide-gelatin blend, and methods for making and using these compositions, including pourable/pumpable floor underlayment slurries and methods for forming high strength underlayment on different substrates.

公开(公告)号：WO2021221866A2

公开(公告)日：2021-11-04

申请号：PCT/US2021/026145

申请日：2021-04-07

Applicant: UNITED STATES GYPSUM COMPANY

Inventor： VILINSKA, Annamaria ,  LI, Alfred ,  WALKER, Blair C. ,  LAU, Te Hua ,  SCHERMANN, Rudy A. ,  ERICKSON, Stephen P. ,  CARRAZCO, Jose Luis ,  RUEDA, Angel Arturo

IPC: C04B28/14 ,  C04B11/005 ,  C04B18/167 ,  C04B2111/0062 ,  C04B24/42 ,  C04B28/145 ,  C04B38/10

Abstract: A method for making a gypsum board including: combining a first plurality of particles including at least about 50 wt. % calcium sulfate dihydrate and about 0.05 wt. % to about 10 wt. % hydrophobic material and having a D50 particle size of about 200 µm to about 800 µm with a second plurality of particles including calcium sulfate hemihydrate to form a combined mixture of calcium sulfate; adding water to the combined mixture of calcium sulfate to make an aqueous gypsum slurry; depositing a core layer including the aqueous gypsum slurry over a forming surface; and allowing the core layer to set, thereby forming a set gypsum core.