Polyimide film-forming polyamide acid solution

Details Polyimide film-forming polyamide acid solution Polyimide film-forming polyamide acid solution

1987-03-31

1989-11-14

Kight, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528126, 528128, 528172, 528176, 528188, 528208, 528229, 528353, C08G 802

Patent

active

048808954

ABSTRACT:
A polyamide acid solution is disclosed, comprising a polyamide acid comprising as main components at least one recurring unit selected from the recurring units of the formulae (I) to (IV) and a recurring unit of formula (V), dissolved in an organic solvent comprising as a main component an amide type polar solvent having a boiling point of 170.degree. C. or less. The solution is capable of forming a polyimide film which has colorless transparency free from coloration and strong adhesion to a substrate for liquid crystal cell enough to prevent penetration of water into interface between the substrate and film. The solution is particularly useful for forming a liquid crystal oriented film.

REFERENCES:
patent: 3234181 (1966-02-01), Olivier
patent: 4520075 (1985-05-01), Igarashi et al.
Synthesis and Characterization of Essentially Colorless Polyimide Films: Anne K. St. Clair et al.
Patent Abstracts of Japan, vol. 7, No. 268, (C-197)(1413), Nov. 30, 1983.
Patent Abstracts of Japan, vol. 10, No. 13, (C-323)(2070) Jan. 18, 1986.

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