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    Aluminate-enhanced type I Portland cements with short setting times and cement boards produced therefrom
    1.
    发明授权
    Aluminate-enhanced type I Portland cements with short setting times and cement boards produced therefrom 有权

    公开(公告)号：US11180412B2

    公开(公告)日：2021-11-23

    申请号：US16801083

    申请日：2020-02-25

    申请人： UNITED STATES GYPSUM COMPANY

    发明人： Qinghua Li ,  Yanfei Peng

    IPC分类号： C04B7/19 ,  C04B7/42 ,  C04B14/06 ,  C04B14/10 ,  C04B14/20 ,  C04B14/28 ,  C04B14/36 ,  C04B18/08

    摘要： Aqueous cementitious slurries including predominantly Type I Portland cement containing an aluminate additive. The aluminate additive is an aluminate salt other than calcium aluminate or calcium sulfoaluminate, preferably sodium aluminate. Cementitious reactive powders of the slurry include the Type I Portland cement and 0.1-10 wt. % of the aluminate additive as an accelerator. The slurries may have a set time of about 10 minutes or less. Due to the short set time, the cementitious reactive powders may facilitate cement board fabrication by continuous manufacturing processes. Methods for making cement boards may include disposing the aqueous cementitious slurry including the cementitious reactive powders in a continuous layer, preferably upon a porous support, and setting the aqueous cementitious slurry with a set time of about 10 minutes or less.

    Cementitious article comprising hydrophobic finish
    3.
    发明授权
    Cementitious article comprising hydrophobic finish 有权

    公开(公告)号：US10336036B2

    公开(公告)日：2019-07-02

    申请号：US13834556

    申请日：2013-03-15

    申请人： United States Gypsum Company

    发明人： Ashish Dubey ,  Yanfei Peng

    IPC分类号： B32B13/14 ,  C04B26/04 ,  C04B26/06 ,  C04B26/08 ,  C04B111/00 ,  C04B111/27 ,  C04B111/30

    摘要： Disclosed are cementitious articles with hydrophobic finish. In some embodiments, the article is a waterproof gypsum panel that is surface reinforced with inorganic mineral fibers that face a flexible and hydrophobic cementitious finish possessing beneficial waterproofing properties. The waterproof gypsum panels of the invention are useful in many applications, such as, for example, tilebacker board in wet or dry areas of buildings, exterior weather barrier panel for use as exterior sheathing, and roof cover board having superior water durability and extremely low surface absorption. The flexible and hydrophobic cementitious finish of the invention can include Class C fly ash, film-forming polymer, silane compound (e.g., alkyl alkoxysilane), and other optional additives.

    Fly ash-free coating formulation for fibrous mat tile backerboard
    7.
    发明授权
    Fly ash-free coating formulation for fibrous mat tile backerboard 有权

    公开(公告)号：US11225793B2

    公开(公告)日：2022-01-18

    申请号：US16371722

    申请日：2019-04-01

    申请人： UNITED STATES GYPSUM COMPANY

    发明人： Yanfei Peng ,  Rafael Bury ,  Jeffrey W. Donelan

    IPC分类号： E04C2/04 ,  B32B13/12 ,  B23B27/20 ,  C04B28/04 ,  C04B28/14 ,  B32B27/20 ,  C04B111/00

    摘要： 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.

    ALUMINATE-ENHANCED TYPE I PORTLAND CEMENTS WITH SHORT SETTING TIMES AND CEMENT BOARDS PRODUCED THEREFROM
    10.
    发明申请
    ALUMINATE-ENHANCED TYPE I PORTLAND CEMENTS WITH SHORT SETTING TIMES AND CEMENT BOARDS PRODUCED THEREFROM 审中-公开

    公开(公告)号：US20200331802A1

    公开(公告)日：2020-10-22

    申请号：US16801083

    申请日：2020-02-25

    申请人： UNITED STATES GYPSUM COMPANY

    发明人： Qinghua LI ,  Yanfei Peng

    IPC分类号： C04B7/19 ,  C04B7/42 ,  C04B18/08 ,  C04B14/06 ,  C04B14/20 ,  C04B14/10 ,  C04B14/28 ,  C04B14/36

    摘要： Aqueous cementitious slurries including predominantly Type I Portland cement containing an aluminate additive. The aluminate additive is an aluminate salt other than calcium aluminate or calcium sulfoaluminate, preferably sodium aluminate. Cementitious reactive powders of the slurry include the Type I Portland cement and 0.1-10 wt. % of the aluminate additive as an accelerator. The slurries may have a set time of about 10 minutes or less. Due to the short set time, the cementitious reactive powders may facilitate cement board fabrication by continuous manufacturing processes. Methods for making cement boards may include disposing the aqueous cementitious slurry including the cementitious reactive powders in a continuous layer, preferably upon a porous support, and setting the aqueous cementitious slurry with a set time of about 10 minutes or less.