公开(公告)号：US4520075A

公开(公告)日：1985-05-28

申请号：US654517

申请日：1984-09-25

申请人： Kazumasa Igarashi ,  Katsuhiko Yamaguchi ,  Kazuo Iko ,  Kazuyuki Miki

发明人： Kazumasa Igarashi ,  Katsuhiko Yamaguchi ,  Kazuo Iko ,  Kazuyuki Miki

IPC分类号： C08G73/10

CPC分类号： C08G73/106 ,  Y10T428/31623 ,  Y10T428/31663 ,  Y10T428/31721 ,  Y10T428/31725

摘要： A siloxane-modified polyimide precursor which can be converted into a polyimide having excellent adhesion and moisture resistance is produced by simultaneously polymerizing a diaminosiloxane and a diamine containing no silicon atoms in its molecule with 3,3',4,4'-biphenyltetracarboxylic dianhydride, wherein the diaminosiloxane is used in an amount of 1 to 4 mole % per mole of the total diamino compounds and such that the silicon content in the final reaction product is 0.5 wt % or less. The thus obtained precursor solution is further heat aged to reduce the molecular weight of the precursor so that solution viscosity is decreased to a proper level suitable for coating operation.

摘要翻译： 通过在其分子中同时聚合二氨基硅氧烷和不含硅原子的二胺与3,3'，4,4'-联苯四羧酸二酐同时聚合可以转化为具有优异的粘合性和耐湿性的聚酰亚胺的硅氧烷改性的聚酰亚胺前体， 其中所述二氨基硅氧烷的用量为每摩尔全部二氨基化合物1至4摩尔％，并且使得最终反应产物中的硅含量为0.5重量％或更少。 由此获得的前体溶液进一步加热老化以降低前体的分子量，使得溶液粘度降低到适合于涂覆操作的适当水平。