发明授权
US5519084A Redispersible acrylic polymer powder for cementitious compositions
失效
用于水泥组合物的可再分散丙烯酸聚合物粉末
- 专利标题： Redispersible acrylic polymer powder for cementitious compositions
- 专利标题（中）： 用于水泥组合物的可再分散丙烯酸聚合物粉末
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申请号： US173251申请日： 1993-12-23
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公开(公告)号： US5519084A公开(公告)日： 1996-05-21
- 发明人: Helen Pak-Harvey , Chung-Ling Mao
- 申请人： Helen Pak-Harvey , Chung-Ling Mao
- 申请人地址： PA Allentown
- 专利权人： Air Products and Chemicals, Inc.
- 当前专利权人： Air Products and Chemicals, Inc.
- 当前专利权人地址： PA Allentown
- 主分类号： C04B24/18
- IPC分类号： C04B24/18 ; C04B24/24 ; C04B24/26 ; C04B24/38 ; C04B40/00 ; C08J3/12 ; C08L29/04 ; C09D133/06
摘要：
A method for preparing an acrylic polymer powder which is redispersible in water by atomizing an aqueous polymer dispersion containing a dispersing aid, the improvement which comprises employing an acrylic polymer containing 1-15 wt % olefinically unsaturated carboxylic acid comonomer and an effective amount of a dispersing aid consisting essentially of polyvinyl alcohol.
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