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    Cementitious article comprising hydrophobic finish
    5.
    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.

    Self-consolidating geopolymer compositions and methods for making same
    7.
    发明授权
    Self-consolidating geopolymer compositions and methods for making same 有权

    公开(公告)号：US11021399B2

    公开(公告)日：2021-06-01

    申请号：US16445940

    申请日：2019-06-19

    申请人： UNITED STATES GYPSUM COMPANY

    发明人： Ashish Dubey ,  Sundararaman Chithiraputhiran

    IPC分类号： C04B28/14 ,  C04B24/32 ,  C04B24/06 ,  C04B103/22 ,  C04B103/40 ,  C04B103/60 ,  C04B103/30 ,  C04B103/50 ,  C04B103/12

    摘要： Self-consolidating geopolymer compositions utilizing fly ash and inorganic mineral including alkaline earth metal oxide as cementitious reactive components and include cement set retarder. The alkaline earth metal oxide is preferably calcium oxide (also known as lime or quicklime) and/or magnesium oxide. The inorganic minerals including alkaline earth metal oxide have an alkaline earth metal oxide content preferably greater than 50 wt. %, more preferably greater than 60 wt. %, even more preferably greater than 70 wt. %, and most preferably greater than 80 wt. %, for example greater than 90 wt. %. The cementitious reactive powder may optionally also include one or more aluminous cements and one or more source of calcium sulfates. The cementitious reactive powders are activated with an alkali metal chemical activator selected from alkali metal salt and/or alkali metal base. Methods for making the compositions are also disclosed.

    GEOPOLYMER COMPOSITIONS AND METHODS FOR MAKING SAME
    9.
    发明申请
    GEOPOLYMER COMPOSITIONS AND METHODS FOR MAKING SAME 审中-公开

    公开(公告)号：US20200039884A1

    公开(公告)日：2020-02-06

    申请号：US16446047

    申请日：2019-06-19

    申请人： UNITED STATES GYPSUM COMPANY

    发明人： Ashish Dubey

    IPC分类号： C04B28/14 ,  C04B28/10 ,  C04B14/06 ,  C04B24/04 ,  C04B24/26 ,  C04B24/38 ,  C04B24/32

    摘要： Geopolymer compositions utilizing fly ash and an inorganic mineral including alkaline earth metal oxide as cementitious reactive components. The inorganic mineral includes alkaline earth metal oxide preferably calcium oxide (also known as lime or quicklime) or magnesium oxide, or combinations thereof. The cementitious reactive powder may also optionally include one or more aluminous cements and one or more source of calcium sulfates. The cementitious reactive powders are activated with an alkali metal chemical activator selected from at least one member of the group consisting of an alkali metal salt and an alkali metal base. The inorganic minerals including alkaline earth metal oxide preferred in this invention have an alkaline earth metal oxide content preferably greater than 50 wt %, more preferably greater than 60 wt %, even more preferably greater than 70 wt %, and most preferably greater than 80 wt %, for example greater than 90 wt %. Methods for making the compositions are also disclosed.