发明授权
- 专利标题： Fast drying gypsum products
- 专利标题（中）： 快干石膏制品
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申请号： US11152661申请日： 2005-06-14
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公开(公告)号： US07572328B2公开(公告)日： 2009-08-11
- 发明人: Dennis M. Lettkeman , Qingxia Liu , John W. Wilson , Brian S. Randall , David R. Blackburn , Michael P. Shake
- 申请人： Dennis M. Lettkeman , Qingxia Liu , John W. Wilson , Brian S. Randall , David R. Blackburn , Michael P. Shake
- 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： Greer, Burns & Crain, Ltd.
- 代理商 David F. Janci, Esq.; Pradip Sahu, Esq.
- 主分类号： C04B11/00
- IPC分类号： C04B11/00
摘要：
A slurry is made including water, at least 50% by weight calcium sulfate hemihydrate, and a specific polycarboxylate dispersant prepared using at least three repeating units. A first repeating unit is a vinyl ether-type repeating unit. A second repeating unit includes a maleic acid-type repeating unit. A third repeating unit includes an acrylic acid-type repeating unit. The polymer dispersant has a molecular weight of from about 20,000 to about 80,000 Daltons. The slurry made from this composition can be made at reduced water levels to speed drying and reduce drying costs.
公开/授权文献
- US20060281837A1 Fast drying gypsum products 公开/授权日：2006-12-14