Polyimide copolymer, polyimide copolymer resin molded products a

Details Polyimide copolymer, polyimide copolymer resin molded products a Polyimide copolymer, polyimide copolymer resin molded products a

1997-05-21

1999-01-12

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528185, 528187, C08G 6302

Patent

active

058591710

ABSTRACT:
A polyimide copolymer containing a block polyimide polymer component composed of a rigid aromatic diamine compound and an aromatic tetracarboxylic acid compound and a random polyimide copolymer component composed of a flexible aromatic diamine compound and at least two types of aromatic tetracarboxylic acid compounds is prepared by a two-stage polymerization process. Resin molded products prepared from the polyimide copolymer have high modulus, low thermal expansion and low water absorption and can be used as TAB base films that require higher processability and precision.

REFERENCES:
patent: 4535105 (1985-08-01), Inaike et al.
patent: 4779872 (1988-10-01), Sasaki et al.
Patent Abstracts of Japan, vol. 014, No. 446, 25 Sep. 1990 & JP 02 175772 A (Sumitomo Bakelite Co Ltd), 9 Jul. 1990, Abstract.
Patent Abstracts of Japan, vol. 016, No. 144, 10 Apr. 1992 & JP 04 004231 A (Sumitomo Bakelite Co Ltd), 8 Jan. 1992, Abstract.
Database WPI, Section CH, Week 9516, Derwent Publications Ltd., London, GB; Class A26, AN 95-118748 -XP002047778 & JP 07 041 558 A (Kanebuchi Kagaku Kogyo KK), 10 Feb. 1995.

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