Aromatic polyimide compositions of high solubility and their use

Details Aromatic polyimide compositions of high solubility and their use Aromatic polyimide compositions of high solubility and their use

1982-10-19

1988-04-05

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

528125, 528128, 528188, 528185, 528220, 528228, 528229, 528352, C08G 6926

Patent

active

047360151

ABSTRACT:
Aromatic polyimide compositions, useful in particular for manufacturing adhesive materials, varnishes and films withstanding high temperatures, having a high solubility in organic solvents, particularly polar solvents and which are manufactured by reacting, in such a solvent, a tetraester or diacid-diester of benzhydrol 3,3', 4, 4' tetracarboxylic acid with an aromatic diamine for a sufficient time to obtain a polycondensation reaction product having an inherent viscosity at 30.degree. C., at a concentration of 5 g/liter in N-methyl pyrrolidone, ranging from 0.1 to 2 dl/g.

REFERENCES:
patent: 3609123 (1971-09-01), Rabilloud et al.
patent: 3793291 (1974-02-01), Cohen et al.
patent: 3933745 (1976-01-01), Bargain et al.
patent: 3939109 (1976-02-01), Barie et al.
patent: 4489185 (1984-12-01), Schoenberg

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