Polyetherimide foam procursors and foams having improved...

Details Polyetherimide foam procursors and foams having improved... Polyetherimide foam procursors and foams having improved...

C - Chemistry, Metallurgy

07

D

403/58, 260/306.

C07D 209/48 (2006.01) C08G 73/10 (2006.01) C08J 9/00 (2006.01)

Patent

CA 2039562

ABSTRACT OF THE DISCLOSURE A method of making polyetherimide foam precursors and flexible polyetherimide foams having improved specific tensile strength, resistance to high temperatures and flame, low density and flexibility at both high and cryogenic temperatures. 4,4'-oxydiphthalic anhydride (ODPA) is reacted with an alcohol to produce a diester, which is then reacted with a suitable monomeric polyamine such as meta phenylene diamine to produce a precursor. This material is dried to a solid block or powder. Upon heatinq, foaming occurs, resulting in a fine celled white friable mass. The foam is cured by heating for a suitable period and is ready for use.

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