Polyimide foam

Details Polyimide foam Polyimide foam

1990-05-08

1990-12-18

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521184, 521189, 528185, 528353, C08J 900

Patent

active

049786920

ABSTRACT:
Thermoplastic polyimide foams are provided which essentially consist of recurring units represented by the formula (I): ##STR1## wherein X is a bond, divalent hydrocarbon radical having from 1 to 10 carbon atoms etc. and R is an aliphatic radical having 2 or more carbon atoms, cycloaliphatic radical etc.
The foams have an apparent density of from 0.02 to 0.2 g/cc, average cell diameter of 0.1 to 1 mm and a closed cell content of 50% or more.

REFERENCES:
patent: 4696994 (1987-09-01), Nakajima et al.
patent: 4795798 (1989-01-01), Tamai et al.
patent: 4847349 (1989-07-01), Ohta et al.

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