- 专利标题: Effective use of dispersants in wallboard containing foam
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申请号: US11152404申请日: 2005-06-14
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公开(公告)号: US20060278128A1公开(公告)日: 2006-12-14
- 发明人: Qingxia Liu , Michael Shake , David Blackburn , Stewart Hinshaw
- 申请人: Qingxia Liu , Michael Shake , David Blackburn , Stewart Hinshaw
- 专利权人: United States Gypsum Company
- 当前专利权人: United States Gypsum Company
- 主分类号: C04B16/08
- IPC分类号: C04B16/08 ; C04B20/00 ; C04B16/00 ; C04B24/08 ; C04B24/36 ; C04B28/14 ; C04B11/00
摘要:
Effective use of dispersants in wallboard containing foam results from a method where stucco is mixed with a first dispersant and a first quantity of water to form a gypsum slurry. A soap is blended with a second dispersant and a second quantity of water to make a foam. Subsequently, the foam is combined with the slurry. Choice of different first and second dispersants and their relative amounts allows control of the size distribution of the foam bubbles in the slurry and the resulting voids in the gypsum core. Use of the same dispersant in both the mixer and the foam water provides a boost in efficacy of the dispersant.