- 专利标题: Fast drying gypsum products
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申请号: US11152661申请日: 2005-06-14
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公开(公告)号: US20060281837A1公开(公告)日: 2006-12-14
- 发明人: Dennis Lettkeman , Qingxia Liu , John Wilson , Brian Randall , David Blackburn , Michael Shake
- 申请人: Dennis Lettkeman , Qingxia Liu , John Wilson , Brian Randall , David Blackburn , Michael Shake
- 专利权人: United States Gypsum Company
- 当前专利权人: United States Gypsum Company
- 主分类号: C04B28/14
- IPC分类号: C04B28/14 ; C04B24/26
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
- US07572328B2 Fast drying gypsum products 公开/授权日:2009-08-11