Process for the preparation of aromatic polyimide film

Details Process for the preparation of aromatic polyimide film Process for the preparation of aromatic polyimide film

1991-11-26

1994-05-03

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

By casting liquids on a solid supporting or shaping surface

264204, 264236, 26433121, 264347, 26433119, 528188, 528353, B29C 3914

Patent

active

053085698

ABSTRACT:
A process for the preparation of an aromatic polyimide film includes the steps of casting a polyamide acid solution containing an imidization agent on a support in the form of a film, heating the filmy cast solution on the support at a temperature of 80.degree. to 200.degree. C. to obtain a self-supportable film; peeling the self-supportable film from the support; and further heating the film at a temperature of not lower than 300.degree. C. The polyamide acid solution includes a polyamide acid obtained by polymerization reaction of 3,4,3',4'-biphenyltetracarboxylic dianhydride and p-phenylenediamine in a mixture of a polar organic solvent and a small amount of an imidization agent selected from imidazole, a substituted imidazole, benzimidazole, a substituted benzimidazole, isoquinoline, and a substituted pyridine.

REFERENCES:
patent: 3862897 (1975-01-01), Gattus et al.
patent: 4358581 (1982-11-01), Sutton, Jr.
patent: 4470944 (1984-09-01), Asakura et al.
patent: 4473523 (1984-09-01), Sasaki et al.
patent: 4687611 (1987-08-01), Sroog
patent: 4797307 (1989-01-01), Kunimoto et al.
patent: 5037587 (1991-08-01), Saruwatari et al.

Affiliated with

Also associated with

Rating

Process for the preparation of aromatic polyimide film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the preparation of aromatic polyimide film, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of aromatic polyimide film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2113003