Polyimide compositions

Details Polyimide compositions Polyimide compositions

1984-05-04

1986-05-13

Lee, Lester L.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528126, 528128, 528172, 528185, 528188, 528189, 528208, 528220, 528229, 528352, 528353, C08G 7310

Patent

active

045888043

ABSTRACT:
A soluble polyimide derived from dehydration of a polyamic acid which is the liquid phase condensation reaction product of a solution in aprotic solvent of approximately equimolar amounts of aromatic dianhydride and aromatic diamine. At least 50 mole % of the dianhydride must have ring linkages which prevent conjugation between the rings and at least 20 mole % of the diamine must contain electron withdrawing groups.

REFERENCES:
patent: 3356648 (1967-12-01), Rogers
patent: 3649601 (1972-03-01), Critchley et al.
patent: 3666709 (1972-05-01), Suzuki et al.
patent: 3817927 (1974-06-01), Kovacs et al.
patent: 3959350 (1976-05-01), Rogers
patent: 4111906 (1978-09-01), Jones et al.
patent: 4336175 (1982-06-01), Gibbs

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