发明授权
- 专利标题： Process for coagulation and washing of polybenzazole fibers
- 专利标题（中）： 凝固和洗涤聚吲哚纤维的方法
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申请号： US110149申请日： 1993-08-20
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公开(公告)号： US5393478A公开(公告)日： 1995-02-28
- 发明人: Ashish Sen , Katsuya Tani , Kazunori Katoh
- 申请人： Ashish Sen , Katsuya Tani , Kazunori Katoh
- 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： D01F6/74
- IPC分类号： D01F6/74 ; D01F6/00
摘要：
Fibers spun from polybenzazole dopes can quickly be washed to remove polyphosphoric acid by a combination of initially washing with an acidic liquid and second washing with a hot leaching fluid at at least about 60. The process can reach acceptable residual phosphorous levels (1500-2000 ppm) in as little as about 2 or 3 minutes.
公开/授权文献
- USD433712S Sorter 公开/授权日：2000-11-14
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