发明授权
- 专利标题： Process for coagulating and washing lyotropic polybenzazole films
- 专利标题（中）： 易溶性聚吲哚膜的凝固和洗涤方法
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申请号： US887443申请日： 1992-05-21
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公开(公告)号： US5302334A公开(公告)日： 1994-04-12
- 发明人: Peter E. Pierini , Reid H. Bowman , Willie E. Rochefort , Ming-Biann Liu
- 申请人： Peter E. Pierini , Reid H. Bowman , Willie E. Rochefort , Ming-Biann Liu
- 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： B29C41/24
- IPC分类号： B29C41/24 ; B29C55/00 ; B29C67/06 ; B29D7/01 ; B29K81/00 ; B29L7/00 ; C08J5/18 ; B29C55/12
摘要：
A process for coagulating a polybenzazole film which includes contacting a lyotropic polybenzazole dope film that is constrained in at least two directions with a coagulant under conditions such that the polybenzazole polymer separates as a gelled moiety with the structure set such that further removal of solvent will result in no more than a 5% increase in the force necessary to constrain the film.
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