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公开(公告)号：US20200262180A1
公开(公告)日：2020-08-20
申请号：US16581070
申请日：2019-09-24
Applicant: United States Gypsum Company
Inventor： Mark Hemphill , Yijun Sang
Abstract: Disclosed is a composite gypsum board comprising a board core comprising set gypsum sandwiched between face and back cover sheets. The composite gypsum board also comprises an intermediate sheet between the board core and the face cover sheet, with a thin, dense gypsum layer disposed between the intermediate sheet and the face cover sheet. Optionally, a second dense gypsum layer can be disposed between a first major side of the board core and the back cover sheet. Also disclosed is a method of preparing a composite gypsum board in which an intermediate sheet is applied over a dense gypsum layer disposed on a face cover sheet. A back cover sheet is applied to the other major side of the board core, with a second dense gypsum layer optionally disposed therebetween.
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公开(公告)号：US11999658B2
公开(公告)日：2024-06-04
申请号：US17851709
申请日：2022-06-28
Applicant: UNITED STATES GYPSUM COMPANY
Inventor： Qinghua Li , Mark Hemphill
IPC: C04B28/14 , B28B19/00 , B32B5/02 , B32B5/18 , B32B5/24 , B32B7/02 , B32B13/04 , B32B13/08 , B32B29/00 , B32B37/15 , B32B38/00 , C04B11/26 , C04B14/04 , C04B18/04 , C04B18/06 , C04B22/00 , C04B22/06 , C04B22/10 , C04B22/16 , C04B103/00 , C04B111/00
CPC classification number: C04B28/14 , B28B19/0092 , B32B5/022 , B32B5/18 , B32B5/245 , B32B7/02 , B32B13/045 , B32B13/08 , B32B29/007 , B32B37/15 , B32B38/0004 , B32B38/164 , C04B11/266 , C04B14/047 , C04B18/0445 , C04B18/064 , C04B18/065 , C04B22/0093 , C04B22/064 , C04B22/10 , C04B22/16 , B32B2038/0084 , B32B2250/40 , B32B2262/101 , B32B2264/10 , B32B2264/30 , B32B2266/049 , B32B2305/022 , B32B2307/72 , B32B2307/732 , B32B2309/02 , B32B2315/00 , B32B2315/085 , B32B2317/12 , B32B2607/00 , C04B2103/0078 , C04B2111/00629
Abstract: A gypsum wallboard having a core with a central core layer and one or more densified layers is disclosed. At least one densified layer contains salt absorbent particles of zeolite and/or hydrotalcite to improve adhesion of the gypsum core to a cover sheet. Also, methods of making the gypsum wallboard and a wall system for employing the gypsum wallboard are disclosed.
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公开(公告)号：US11702373B2
公开(公告)日：2023-07-18
申请号：US16804936
申请日：2020-02-28
Applicant: United States Gypsum Company
Inventor： Qinghua Li , Naser Aldabaibeh , Mark Hemphill , Trevor Rische , Suman Sinha Ray
IPC: C04B41/50 , B28B19/00 , C04B28/14 , E04C2/04 , E04B1/94 , C04B41/45 , B28B11/14 , B28B11/04 , B28B11/24 , B32B13/08 , C04B18/08 , C04B111/00 , C04B111/28
CPC classification number: C04B41/5024 , B28B11/04 , B28B11/14 , B28B11/243 , B28B19/0092 , B32B13/08 , C04B28/14 , C04B41/4535 , E04B1/942 , E04C2/043 , C04B18/08 , C04B2111/0062 , C04B2111/28
Abstract: Disclosed are an organic binder-based coating; a composite gypsum board containing face and back cover sheets, an outside surface of the back cover sheet bearing the coating; and a method of preparing composite board where the back cover sheet contains the coating on its outer surface. The coating is formed from a composition comprising an alkaline silicate, a solid filler, and optionally, a borate. An enhancing layer can also be applied to the back cover sheet.
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公开(公告)号：US11186066B2
公开(公告)日：2021-11-30
申请号：US16401675
申请日：2019-05-02
Applicant: UNITED STATES GYPSUM COMPANY
Inventor： Mark Hemphill , Qinghua Li , Charles W. Cochran
Abstract: Gypsum boards formed from synthetic gypsum and other gypsum sources having high chloride salt concentrations. The gypsum boards may include a set gypsum board core layer between a front and back paper cover sheets. The back paper cover sheet has a plurality of perforations extending therethrough. Methods of making the gypsum boards, and a wall system for employing the gypsum boards, are also provided. The concentration of the chloride anion in aqueous gypsum slurry used to make the set gypsum board core layer and to perform the methods of the invention may range from about 500 ppm to about 3000 ppm, typically from about 500 ppm to about 2000 ppm per 1,000,000 parts by weight calcium sulfate hemihydrate, more typically from about 500 ppm to about 1500 ppm per 1,000,000 parts by weight calcium sulfate hemihydrate.
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公开(公告)号：US20230250019A1
公开(公告)日：2023-08-10
申请号：US17948710
申请日：2022-09-20
Applicant: United States Gypsum Company
Inventor： Qinghua Li , Mark Hemphill
IPC: C04B11/28
CPC classification number: C04B11/28 , C04B2111/0062
Abstract: This disclosure provides products useful as construction materials and containing set gypsum and ammonium-exchanged vermiculite, including a gypsum panel having a gypsum core comprising set gypsum and ammonium-exchanged vermiculite and characterized by decreased heat shrinkage and increased resistance to fire damage in comparison to the gypsum panel that comprises vermiculite that has not been ammonium-exchanged. The disclosure further relates to methods for producing the gypsum panel and constructing building assemblies with the gypsum panels, including walls and ceilings.
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Patent Agency Ranking
公开(公告)号：US20230339811A1
公开(公告)日：2023-10-26
申请号：US17978406
申请日：2022-11-01
Applicant: United States Gypsum Company
Inventor： Naser Aldabaibeh , Mark Antosh , Mark Hemphill
CPC classification number: C04B24/267 , C04B11/007 , C04B28/141 , C04B2103/12
Abstract: Provided are a gypsum set accelerator wherein the gypsum set accelerator is a dry-milled mixture comprising calcium sulfate dihydrate co-ground with one or more of the following: a polycarboxylic ether (PCE) and/or a sulfonated melamine polycondensate (SMP), gypsum slurries formulated with the gypsum set accelerator and methods for producing the gypsum set accelerator and manufacturing gypsum products with the gypsum set accelerator.
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公开(公告)号：US11787739B2
公开(公告)日：2023-10-17
申请号：US17025003
申请日：2020-09-18
Applicant: United States Gypsum Company
Inventor： Yijun Sang , Mark Hemphill
IPC: C04B24/38 , C04B28/14 , B32B13/04 , B32B13/08 , E04C2/04 , B32B37/00 , C09J103/02 , B32B37/15 , B32B38/00 , C04B111/00 , B32B38/16
CPC classification number: C04B24/383 , B32B13/04 , B32B13/08 , B32B37/0038 , B32B37/15 , B32B38/0036 , B32B38/164 , C04B28/14 , C09J103/02 , E04C2/043 , E04C2/049 , B32B38/0004 , B32B2038/166 , B32B2309/02 , B32B2315/18 , B32B2317/20 , C04B2111/0062 , C04B2201/50
Abstract: Disclosed is an acid-modified flour and a method of making the acid-modified flour. The acid-modified flour is desirably prepared using a dry milling process. A starting flour is combined with a strong acid to form a mixture. The mixture is heated. A neutralizer is added to increase the pH of the mixture. If desired, the mixture can be dried and any agglomerates can be removed. The acid-modified flour can be used as a binder in a slurry for preparing one or more gypsum layers in a gypsum board.
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8.发明申请公开(公告)号：US20190338516A1
公开(公告)日：2019-11-07
申请号：US16356303
申请日：2019-03-18
Applicant: United States Gypsum Company
Inventor： Suman Sinha Ray , Mark Antosh , Mark Hemphill , Yijun SANG
Abstract: A layered gypsum wallboard can include: a gypsum board having opposing front and back faces, wherein the gypsum board comprises a first cover sheet material at the front face, a second cover sheet material at the back face, and a gypsum core layer comprising gypsum; an adhesive layer on the second cover sheet material of the gypsum board, the adhesive including a polymer having a glass transition temperature (Tg) of −10° C. to 30° C.; an intermediate gypsum layer including gypsum on the adhesive layer such that the adhesive layer is between the second cover sheet material and the intermediate gypsum layer, wherein the adhesive layer and the intermediate gypsum layer have a combined thickness of 0.09 inches to 0.25 inches; and a third cover sheet material, wherein the intermediate gypsum layer is between and in contact with the adhesive layer and the third cover sheet material.
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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
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.
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公开(公告)号：US11046053B2
公开(公告)日：2021-06-29
申请号：US16581070
申请日：2019-09-24
Applicant: United States Gypsum Company
Inventor： Mark Hemphill , Yijun Sang
Abstract: Disclosed is a composite gypsum board comprising a board core comprising set gypsum sandwiched between face and back cover sheets. The composite gypsum board also comprises an intermediate sheet between the board core and the face cover sheet, with a thin, dense gypsum layer disposed between the intermediate sheet and the face cover sheet. Optionally, a second dense gypsum layer can be disposed between a first major side of the board core and the back cover sheet. Also disclosed is a method of preparing a composite gypsum board in which an intermediate sheet is applied over a dense gypsum layer disposed on a face cover sheet. A back cover sheet is applied to the other major side of the board core, with a second dense gypsum layer optionally disposed therebetween.
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