Tetrapolyimide film containing oxydipthalic dianhydride

Details Tetrapolyimide film containing oxydipthalic dianhydride Tetrapolyimide film containing oxydipthalic dianhydride

1992-07-30

1993-06-15

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

4284735, 528126, 528128, 528170, 528172, 528173, 528176, 528179, 528220, 528229, 528350, 528353, C08G 7310, C08G 6926

Patent

active

052199770

ABSTRACT:
Tetrapolyimide films derived from oxydiphthalic dianhydride, pyromellitic acid dianhydride, p-phenylene diamine and 4,4'-diaminodiphenyl ether, and their preparation are described. The tetrapolymer films have low water absorption, low coefficients of thermal and hygroscopic expansion, high modulus and are caustic etchable and can be used in flexible printed circuit and tape automated bonding applications.

REFERENCES:
patent: 4535105 (1985-08-01), Inaike et al.
patent: 4590258 (1986-05-01), Linde et al.
patent: 4677186 (1987-06-01), Pfeifer
patent: 4778872 (1988-10-01), Sasaki et al.
patent: 4855391 (1989-08-01), Berdahl et al.
patent: 4892896 (1990-01-01), Wright
patent: 4914182 (1990-04-01), Pfeifer et al.
patent: 5004627 (1991-04-01), Presswood et al.

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