Polyimide copolymers containing 3,3',4,4'-tetracarboxybiphenyl d

Details Polyimide copolymers containing 3,3',4,4'-tetracarboxybiphenyl d Polyimide copolymers containing 3,3',4,4'-tetracarboxybiphenyl d

1991-09-13

1994-04-19

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

528 33, 528125, 528128, 528170, 528171, 528172, 528173, 528174, 528175, 528176, 528183, 528185, 528188, 528189, 528220, 528226, 528229, 528350, 528352, C08C 6926, C08C 7310

Patent

active

053046269

ABSTRACT:
A chemical resistant copolymer useful in electronic applications, said copolymer is a polyimide containing a 3,3',4,4'-tetracarboxybiphenyl dianhydride (BPDA) moiety, at least one other dianhydride moiety, and at least one diamine.

REFERENCES:
patent: 4477648 (1984-10-01), Jones
patent: 4535101 (1985-08-01), Lee
patent: 4568715 (1986-02-01), Itatani et al.
patent: 4886874 (1989-12-01), Nagano
patent: 4923968 (1990-05-01), Kunimune
patent: 5089593 (1992-02-01), Fjare et al.
"Annex to the International Search Report on International Patent Application No. US 9207703, SA 65350".

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