Polyimides-amides and copolyimides-polyamides from tetramethylcyclobutane-1,2,3,4-tetracarboxylic dianhydride, dicarboxylic acids and a mixture of diamines
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United States of America Patent
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Oct 18, 1983
Issued Date -
N/A
app pub date -
Sep 29, 1982
filing date -
Jul 24, 1981
priority date (Note) -
Expired
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Abstract
Novel polyimide-amide polymers and copolymers and molding compositions are prepared from tetramethylcyclobutane-1,2,3,4-tetracarboxylic dianhydride, dicarboxylic acids and mixtures of diamines. Also glass and graphite filled polymers are prepared. The polyimide-polyamide polymers and copolymers are useful as engineering plastics.
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