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    • 1. 发明授权
    • Wholly aromatic polyamic acid solution composition
    • 全芳香族聚酰胺酸溶液组成
    • US4535105A
    • 1985-08-13
    • US587177
    • 1984-03-07
    • Toshihiro InaikeShuji YamamotoShunji OheKazunori Otsuka
    • Toshihiro InaikeShuji YamamotoShunji OheKazunori Otsuka
    • C08J3/09C08K5/34C08K5/20C08K5/41C08L79/08
    • C08J3/091C08J2379/08
    • An aromatic polyamic acid solution composition useful as an electrically insulating varnish, comprises (1) an aromatic polyamic acid which is a polymerization product of (A) a tetracarboxylic acid component containing at least 80 molar % of the sum of (a) a first acid ingredient consisting of 3,3',4,4'-biphenyltetracarboxylic dianhydride and (b) a second acid ingredient consisting of at least one member selected from the group consisting of pyromellitic dianhydride, and 3,3'4,4'-benzophenone tetracarboxylic dianhydride, the molar ratio of the first acid ingredient to the second acid ingredient being in the range of from 30:70 to 75:25, with (B) an amine component consisting of at least one aromatic amine in a molar ratio of the tetracarboxylic acid component to the amine component of from 97:100 to 103:100, and which polymeric acid has a logarithmic viscosity number of from 0.1 to 1.5 determined in a concentration of 0.5 g/100 ml in N-methyl-2-pyrrolidone at a temperature of 30.degree. C., and dissolved in a concentration of from 5% to 40% by weight in (2) an organic polar solvent.
    • 可用作电绝缘漆的芳族聚酰胺酸溶液组合物包括(1)芳族聚酰胺酸,其是(A)含有(a)第一酸的总量的至少80摩尔%的四羧酸组分的聚合产物 由3,3',4,4'-联苯四羧酸二酐组成的成分和(b)由至少一种选自均苯四酸二酐和3,3'4,4'-二苯甲酮四羧酸组成的第二酸成分 二酸酐,第一酸成分与第二酸成分的摩尔比在30:70至75:25的范围内,(B)由至少一种芳族胺组成的胺组分,四羧酸的摩尔比 酸组分为97:100至103:100,并且该聚合酸的浓度为0.5g / 100ml,在N-甲基-2-吡咯烷酮中的对数粘度为0.1至1.5, 温度30℃, 并且在(2)有机极性溶剂中以5重量%至40重量%的浓度溶解。