发明授权
- 专利标题： HIGH MOLECULAR WEIGHT ADDITIVES FOR CALCINED GYPSUM AND CEMENTITIOUS COMPOSITIONS
- 专利标题（中）： 高分子量配件为烧毁，石膏和水泥组合物
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申请号： EP03718076.7申请日： 2003-03-27
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公开(公告)号： EP1487756B1公开(公告)日： 2009-08-05
- 发明人: LETTKEMAN, Dennis, Mark , WHITESIDE, Eldon, L. , BEDWELL, William, K. , KALIGIAN, Raymond, A., II
- 申请人： UNITED STATES GYPSUM COMPANY
- 申请人地址： 125 South Franklin Street Chicago, Illinois 60606 US
- 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： 125 South Franklin Street Chicago, Illinois 60606 US
- 代理机构： Pontet, Bernard
- 优先权： US367920P 20020327
- 国际公布： WO2003082765 20031009
- 主分类号： C04B28/14
- IPC分类号： C04B28/14 ; C04B24/26
摘要：
A mixture is used in conjunction with water is used for preparing a slurry that hydrates to form an exterior gypsum cement. The mixture includes 30-70 % by weight hydraulic cement, 30-70 % by weight calcined gypsum and 0.05-2.5 % polycarboxylate. When the mixture is added to water less than 40 weight % based on the weight of the mixture, a slurry is formed that expands very little while it cures.
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