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公开(公告)号:US20060281837A1
公开(公告)日:2006-12-14
申请号:US11152661
申请日:2005-06-14
申请人: Dennis Lettkeman , Qingxia Liu , John Wilson , Brian Randall , David Blackburn , Michael Shake
发明人: Dennis Lettkeman , Qingxia Liu , John Wilson , Brian Randall , David Blackburn , Michael Shake
CPC分类号: C04B28/145 , C04B24/2647 , C04B2111/0062 , C04B7/02 , C04B12/04 , C04B22/064 , C04B22/10 , C04B22/143 , C04B22/16
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.