发明授权
- 专利标题： Preparation of asymmetric membranes by the solvent extraction of polymer components from polymer blends
- 专利标题（中）： 通过聚合物共混物溶剂萃取聚合物组分制备不对称膜
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申请号： US67321申请日： 1987-06-29
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公开(公告)号： US4868222A公开(公告)日： 1989-09-19
- 发明人: Chieh-Chun Chau , Ritchie A. Wessling
- 申请人： Chieh-Chun Chau , Ritchie A. Wessling
- 申请人地址： MI Midland
- 专利权人： The Dow Chemical Company
- 当前专利权人： The Dow Chemical Company
- 当前专利权人地址： MI Midland
- 主分类号： B01D67/00
- IPC分类号： B01D67/00 ; C08J9/00 ; C08J9/26
摘要：
Asymmetric membranes are prepared by selectively treating a major surface of an incompatible polymer blend prepared by melt blending having at least one extractable polymer component and then contacting the polymer blend with a solvent to extract the extractable polymer component. The treated surface becomes the dense layer of the membrane. The major surface is treated by crosslinking, by contacting the surface with a crosslinking agent which is subsequently cured, or by contacting the surface with an agent which reacts with groups on the surface and imparts a polar character to it.
公开/授权文献
- US5385456A Pump for hot chamber die casting of corrosive light alloys 公开/授权日：1995-01-31
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