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    • 8. 发明授权
    • Process for preparing polyimide solution
    • 制备聚酰亚胺溶液的方法
    • US4290936A
    • 1981-09-22
    • US092508
    • 1979-11-08
    • Yoshikazu SasakiHiroshi InoueIchiro SasakiHiroshi ItataniMikito Kashima
    • Yoshikazu SasakiHiroshi InoueIchiro SasakiHiroshi ItataniMikito Kashima
    • C08G73/10C08K5/13
    • C08G73/1028
    • A polyimide solution is prepared by a process wherein a tetracarboxylic acid ingredient containing at least about 80% by mole of 3,3',4,4'-biphenyltetracarboxylic acid or its functional derivative and an aromatic diamine ingredient containing at least about 50% by mole of 4,4'-diaminodiphenyl ether are polymerized at from about 100.degree. to 300.degree. C. in phenol or a halogenated phenolic compound; the amount of the acid and diamine ingredients being approximately equimolar to each other; whereby polymerization of the tetracarboxylic acid ingredient and the aromatic diamine ingredient is effected while being accompanied by imidation. Preferably, the polymerization accompanied by imidation is effected in a manner such that at least a second half of the polymerization is carried out in a closed reaction system. The resulting polyimide solution is suitable for making therefrom shaped articles, such as films, possessing excellent mechanical properties.
    • 通过以下方法制备聚酰亚胺溶液,其中含有至少约80摩尔%的3,3',4,4'-联苯四羧酸或其官能衍生物的四羧酸成分和包含至少约50%的芳族二胺成分 摩尔的4,4'-二氨基二苯醚在苯酚或卤化酚类化合物中在约100-300℃下聚合; 酸和二胺成分的量彼此近似等摩尔数; 从而在伴随着酰亚胺化的同时进行四羧酸成分和芳香族二胺成分的聚合。 优选地,伴随着酰亚胺化的聚合以这样的方式进行,使得聚合的至少一半在闭合反应体系中进行。 所得到的聚酰亚胺溶液适用于具有优异机械性能的成型制品如膜。