发明申请
US20100291305A1 DECREASED EVAPORATION WITH RETARDER FOR A HIGH WATER TO STUCCO RADIO LIGHTWEIGHT BOARD
审中-公开
降低对STUCCO无线电轻便板的高耗水量的延迟
- 专利标题： DECREASED EVAPORATION WITH RETARDER FOR A HIGH WATER TO STUCCO RADIO LIGHTWEIGHT BOARD
- 专利标题（中）： 降低对STUCCO无线电轻便板的高耗水量的延迟
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申请号： US12681681申请日： 2008-12-23
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公开(公告)号： US20100291305A1公开(公告)日： 2010-11-18
- 发明人: James R. Wittbold , Bruce Lynn Petersen , Alfred Li
- 申请人： James R. Wittbold , Bruce Lynn Petersen , Alfred Li
- 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
- 国际申请： PCT/US08/88185 WO 20081223
- 主分类号： C04B28/14
- IPC分类号： C04B28/14 ; C04B24/16 ; B05D3/02
摘要：
A gypsum slurry includes calcium sulfate hemihydrate, a set retarder in amounts of at least 0.15 lb/MSF, a set accelerator, water and aqueous foam. The set accelerator is selected to provide nucleation sites for crystallization of calcium sulfate dihydrate and is present in amounts of at least 5 Ib/MSF. The water to calcium sulfate hemihydrate ratio is at least 0.95. Further, aqueous foam is added in amounts sufficient to create a gypsum board having a dry density of about 29 to about 35 lbs/ft3.
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