发明授权
- 专利标题: Modified landplaster as a wallboard filler
- 专利标题(中): 修改后的平地机作为墙板填料
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申请号: US11490150申请日: 2006-07-20
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公开(公告)号: US07601214B2公开(公告)日: 2009-10-13
- 发明人: David R. Blackburn , Qingxia Liu , Michael P. Shake
- 申请人: David R. Blackburn , Qingxia Liu , Michael P. Shake
- 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:
A gypsum slurry includes calcium sulfate hemihydrate, water and calcium sulfate dihydrate is coated with a hydrophilic, dispersible coating. The coating is less soluble than the calcium sulfate hemihydrate to delay exposure of the landplaster to the remainder of the slurry, preventing premature crystallization and the early stiffening that accompanies it.Another embodiment is a gypsum slurry that includes calcium sulfate hemihydrate, a polycarboxylate dispersant, water and coated calcium sulfate dihydrate. In this case, the hydrophilic, dispersible coating is selected to serve as a modifier to enhance the ability of the dispersant to fluidize the gypsum slurry.
公开/授权文献
- US20070044688A1 Modified landplaster as a wallboard filler 公开/授权日:2007-03-01