Polyimide foam

Details Polyimide foam Polyimide foam

1989-12-19

1990-07-24

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

264 54, 521180, C08J 906, C08J 914

Patent

active

049435949

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: 4795798 (1989-01-01), Tamai et al.
patent: 4797466 (1989-01-01), Oikawa et al.
patent: 4847349 (1989-07-01), Ohta et al.
patent: 4868272 (1989-09-01), Finke et al.
patent: 4874836 (1989-10-01), Wakabayashi et al.

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