Catalysis of polyimide curing
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United States of America Patent
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Issued Date -
Sep 20, 2007
app pub date -
Mar 16, 2006
filing date -
Mar 16, 2006
priority date (Note) -
Abandoned
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Abstract
Polyimide oligomers and polymers are cured with the assistance of a phosphorus based catalyst, such as an aryl, alkyl or arylalkyl phosphite. The resulting material has the desirable high thermal properties of condensation polyimides, but with minimal outgassing of water during cure. Novel properties obtained include an increase in glass transition, crosslink density, lower temperature cure, and improved film formation. These properties are important in applications including solvent based coatings, films, powder coatings, pre-impregnated (prepreg) coatings, laminates, compression molding, and thermosetting resin extrusions.
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