Polyimide foam precursor

Details Polyimide foam precursor Polyimide foam precursor

1991-02-08

1992-06-16

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521117, 521183, 521184, 521185, 521189, C08J 914

Patent

active

051225468

ABSTRACT:
A slurry is produced by adding to a polyimide precursor comprising carboxylic and diamine components at least one foam-enhancing polar, protic additive of the formula ROH, where R is hydrogen, or C.sub.1 to C.sub.12 linear or branched alkyl or cycloalkyl, affording a slurry. The slurry is then brought to a temperature in the range of about 40.degree. C. to about 105.degree. C., producing a homogeneous, transparent solution, opaque suspension, or melt. When heated to a higher temperature the melt foams and cures.

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