发明授权
- 专利标题： Clay-free ready-mixed setting-type joint compound
- 专利标题（中）： 无粘土预拌混合型联合化合物
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申请号： US09474485申请日： 1999-12-29
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公开(公告)号： US06228163B1公开(公告)日： 2001-05-08
- 发明人: Therese A. Espinoza , Charles J. Miller , Richard B. Stevens
- 申请人： Therese A. Espinoza , Charles J. Miller , Richard B. Stevens
- 主分类号： C04B2814
- IPC分类号： C04B2814
摘要：
A two part joint compound which sets by hydration of calcium sulfate hemihydrate to gypsum and is clay-free. One part includes an in-situ acidic acrylate copolymer thickener (i.e., an associative thickener) with the calcium sulfate hemihydrate, along with a non-calcium bearing phosphate set preventer. The first part contains water, but remains unset for at least 175 days. The second part includes a set initiator compound having a cation with a log K value greater than calcium ions. The second part is mixed with the first part when setting is desired.