发明授权
- 专利标题: Light weight gypsum board
- 专利标题(中): 轻质石膏板
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申请号: US13493941申请日: 2012-06-11
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公开(公告)号: US08470461B2公开(公告)日: 2013-06-25
- 发明人: Qiang Yu , Weixin D. Song , Michael R. Lynn
- 申请人: Qiang Yu , Weixin D. Song , Michael R. Lynn
- 申请人地址: US IL Chicago
- 专利权人: United States Gypsum Company
- 当前专利权人: United States Gypsum Company
- 当前专利权人地址: US IL Chicago
- 代理机构: Leydig Voit & Mayer, Ltd.
- 代理商 Philip T. Petti; Pradip K. Sahu
- 主分类号: B52B13/00
- IPC分类号: B52B13/00 ; C04B11/00
摘要:
The invention generally provides gypsum-containing slurries including stucco, naphthalenesulfonate dispersant, and pregelatinized starch. The naphthalenesulfonate dispersant is present in an amount of about 0.1%-3.0% by weight based on the weight of dry stucco. The pregelatinized starch is present in an amount of at least about 0.5% by weight up to about 10% by weight of pregelatinized starch by weight based on the weight of dry stucco in the formulation. Other slurry additives can include trimetaphosphate salts, accelerators, binders, paper fiber, glass fiber, and other known ingredients. The invention also comprises the gypsum-containing products made with such slurries, for example, gypsum wallboard, and a method of making gypsum wallboard.
公开/授权文献
- US20120251813A1 LIGHT WEIGHT GYPSUM BOARD 公开/授权日:2012-10-04