发明授权
- 专利标题： Fabrication of benzbisazole polymers into monolithic articles
- 专利标题（中）： 苯并二唑聚合物制成单片制品
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申请号： US134194申请日： 1993-10-07
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公开(公告)号： US5326509A公开(公告)日： 1994-07-05
- 发明人: Hoe H. Chuah , Ivan J. Goldfarb
- 申请人： Hoe H. Chuah , Ivan J. Goldfarb
- 申请人地址： DC Washington
- 专利权人： The United States of America as represented by the Secretary of the Air Force
- 当前专利权人： The United States of America as represented by the Secretary of the Air Force
- 当前专利权人地址： DC Washington
- 主分类号： B29C67/24
- IPC分类号： B29C67/24 ; C08G73/18 ; C08G73/22 ; C08G75/32 ; C08J5/00 ; B29C39/02
摘要：
A method for fabricating a monolithic polybenzbisazole article including the steps of:(a) dissolving at least one benzbisazole polymer in a strong acid at an elevated temperature;(b) transferring the resulting solution to a mold;(c) cooling the solution in the mold to a temperature below the gelation temperature of the acid-polymer mixture, thus providing a polymer-acid gel;(d) ageing the gel for about 0.25 to 10 days;(e) replacing the acid in the gel with water;(f) replacing the water in the gel with a lower aliphatic alcohol; and(g) densifying the gel.
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