Patent ID: 6890636

Claim:
A thermally stable, non-woven, fibrous paper, comprising: at least one polymer represented by structural formula I: wherein R 1-6 are the same or different and comprise H, a hydroxyl group, a straight or branched alkyl, cycloalkyl, polycycloalkyl, heterocycloalkyl, alkaryl, alkoxy, aryl, aralkyl, alkenyl, or alkynyl group containing approximately 1 to approximately 50 carbon atom(s), carbonyls, esters, carbonates, amides, ketenes, epoxides, a silyl or siloxyl group containing approximately 1 to approximately 50 silicon atom(s), and combinations thereof; wherein X 1-4 are the same or different and comprise N, O, S or Se; wherein n is an integer ranging in value from 1 to approximately 10,000; wherein the thermally stable, non-woven, fibrous paper is thermally stable to at least 650 degrees centigrade; and wherein the thermally stable, non-woven, fibrous paper further comprises at least one additive selected from the group consisting of polyimide friable balloons, polyimide powders, and polyimide microspheres.