发明授权
- 专利标题: Thermally stable polyimide and preparation process of polyimide
- 专利标题(中): 聚酰亚胺热稳定剂及其制备方法
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申请号: US795750申请日: 1991-11-21
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公开(公告)号: US5286840A公开(公告)日: 1994-02-15
- 发明人: Hideaki Oikawa , Nobuhito Koga , Akihiro Yamaguchi , Shoji Tamai
- 申请人: Hideaki Oikawa , Nobuhito Koga , Akihiro Yamaguchi , Shoji Tamai
- 申请人地址: JPX Tokyo
- 专利权人: Mitsui Toatsu Chemicals, Inc.
- 当前专利权人: Mitsui Toatsu Chemicals, Inc.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX2-323074 19901128
- 主分类号: C08G73/10
- IPC分类号: C08G73/10 ; C08G69/26
摘要:
A thermally stable polyimide which is blocked at the polymer terminal with a dicarboxylic acid anhydride represented by the formula (III): ##STR1## wherein Z is a divalent radical selected from the group consisting of a monoaromatic radical which is substantially unsubstituted or substituted with a radical having no reactivity with amine or dicarboxylic acid anhydride and has from 6 to 15 carbon atoms, a condensed polyaromatic radical or a noncondensed aromatic radical connected each other with a direct bond or a bridge member, and has a fundamental skeleton represented by recurring structural units of the formula (IV): ##STR2## and a process of preparing the polyimide.
公开/授权文献
- US5868381A Adjustable angle logging block 公开/授权日:1999-02-09