发明授权
- 专利标题: Method of making a gypsum slurry with modifiers and dispersants
- 专利标题(中): 用改性剂和分散剂制备石膏浆料的方法
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申请号: US11450086申请日: 2006-06-09
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公开(公告)号: US07572329B2公开(公告)日: 2009-08-11
- 发明人: Qingxia Liu , David R. Blackburn , Michael P. Shake , Brian Randall , John W. Wilson , Dennis M. Lettkeman
- 申请人: Qingxia Liu , David R. Blackburn , Michael P. Shake , Brian Randall , John W. Wilson , Dennis M. Lettkeman
- 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:
In a method of making a gypsum slurry, a polycarboxylate dispersant, a modifier and a hydraulic material comprising stucco are selected for use in the slurry. These components are then combined with water to form a slurry, where the modifier is added to the slurry prior to formation of a slurry phase by the water, the stucco and the dispersant. The modifier has been shown to be less effective when added after the dispersant and stucco have been contacted in an aqueous slurry. In a preferred embodiment, an amount of stucco is obtained and the modifier and dispersant are selected. A predissolved solution of a dispersant and modifier is prepared in water to form a solution prior to the addition of the stucco. After mixing the solution, the stucco is added to form the slurry. Optionally, the slurry is then shaped into a product and allowed to set.