Filament of polyimide from pyromellitic acid dianhydride and 3,4

Details Filament of polyimide from pyromellitic acid dianhydride and 3,4 Filament of polyimide from pyromellitic acid dianhydride and 3,4

1985-11-15

1987-02-03

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528184, 528327, 5283291, 528331, 528353, C08G 7310

Patent

active

046409726

ABSTRACT:
Polypyromellitimide filaments having high strength and high modulus are obtained by dry-spinning a solution of polyamide-acid of polypyromellitic dianhydride, 3,4'-oxydianiline and paraphenylenediamine, substituted derivatives thereof or 4,4'-diaminobiphenyl or 4,4'-diaminobenzanilide, then converting the polyamide-acid to the polyimide and drawing.

REFERENCES:
patent: 3415782 (1968-12-01), Irwin et al.
patent: 4290936 (1981-09-01), Sasaki et al.
patent: 4311615 (1982-01-01), Frosch et al.
patent: 4358581 (1982-11-01), Sutton, Jr.
patent: 4376195 (1983-03-01), Lee
patent: 4438256 (1984-03-01), Ohta et al.
patent: 4454276 (1984-06-01), Uda et al.
patent: 4524171 (1985-06-01), Bakshi et al.

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