发明授权
- 专利标题: Gypsum-containing composition having enhanced resistance to permanent deformation
- 专利标题(中): 具有增强的耐永久变形性的含石膏的组合物
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申请号: US10015066申请日: 2001-12-11
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公开(公告)号: US06815049B2公开(公告)日: 2004-11-09
- 发明人: Srinivas Veeramasuneni , Qiang Yu , William A. Frank
- 申请人: Srinivas Veeramasuneni , Qiang Yu , William A. Frank
- 主分类号: B32B522
- IPC分类号: B32B522
摘要:
A composition including, but not limited to, a mixture of a calcium sulfate material, water, and a tetrametaphosphate compound is disclosed. Desirably, the inclusion of the tetrametaphosphate compound (e.g., salt or ion) in a pre-set treatment of a calcium sulfate material enhances the resistance to permanent deformation (e.g., sag), dimensional stability, and/or compressive strength of the composition while also preferably avoiding any significant retardive effect on the rate of hydration of calcined gypsum to calcium sulfate dihydrate. A set gypsum-containing product and a method for producing a set gypsum-containing product having increased resistance to permanent deformation are also disclosed.