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EP0368590A3 Production process for polyimide fibers 失效
聚酰亚胺纤维的生产工艺

Production process for polyimide fibers
摘要:
The process includes thermal or chemical imidation of a polyamic acid which has been obtained by reacting a specific diamine and a particular tetracarboxylic dianhydride in the presence of a dicarboxylic anhydride represented by the following formula:
wherein Z represents a divalent group selected from monocyclic aromatic groups, fused polycyclic aromatic groups and non-fused polycyclic aromatic groups with aromatic rings bonded together directly or via a crosslinking member. The basic skeletal structure is
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