Polyimide precursors and method for preparing crosslinked polyim

Details Polyimide precursors and method for preparing crosslinked polyim Polyimide precursors and method for preparing crosslinked polyim

1989-01-03

1990-09-04

Welsh, Maurice J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C08G 1880, C08G 7306, C08G 7310

Patent

active

049546015

ABSTRACT:
Curable precursors yielding crosslinked, thermally stable polyimides upon heating comprise (1) at least one anhydride-terminated polyamic acid oligomer obtained by reacting an aromatic tetracarboxylic acid dianhydride with an aromatic diamine and (2) a blocked polyfunctional organic isocyanate that reacts to liberate the free isocyanate at a temperature above the imidization temperature of said oligomer. The molar concentration of isocyanate groups in said composition is substantially equal to the molar concentration of terminal anhydride groups in the oligomer.

REFERENCES:
patent: 3847867 (1974-11-01), Heath et al.
patent: 3857820 (1974-12-01), Kojima et al.
patent: 3896089 (1975-07-01), Noda et al.
patent: 3997513 (1976-12-01), Noda et al.
patent: 4313999 (1982-02-01), Hughes
patent: 4322332 (1982-03-01), Hughes
patent: 4429073 (1984-01-01), Pauze et al.
patent: 4742153 (1988-05-01), Sutton, Jr.

Affiliated with

Also associated with

Rating

Polyimide precursors and method for preparing crosslinked polyim does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polyimide precursors and method for preparing crosslinked polyim, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polyimide precursors and method for preparing crosslinked polyim will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-443104