Amine terminated tougheners for epoxy resin based adhesives and materials
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United States of America Patent
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Issued Date -
Apr 16, 2009
app pub date -
Oct 15, 2007
filing date -
Oct 15, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An uncured liquid epoxy composition comprises a liquid epoxy resin and a) a tri-amine terminated polyether toughener optionally adducted with an epoxy resin, or a mixture of said tri-amine terminated polyether toughener optionally have an epoxy adduct thereon with a core-shell copolymer or with an epoxidized carboxyl terminated butadiene-acrylonitrile copolymer; or b) an amine terminated tri-block polyether toughener optionally adducted with an epoxy resin, or a mixture of said amine terminated tri-block polyether toughener optionally having an epoxy adducted thereon with a core-shell copolymer or with an epoxidized carboxyl terminated butadiene-acrylonitrile copolymer. The uncured toughener composition need not contain any high molecular weight polymers or material and is utilized as a low viscosity paste adhesive having good storage stability, and when cured has very good low temperature peel strength at minus 40° C. along with very good ambient temperature toughness which correlates with improved higher speed impact resistance. The epoxy compositions are suitable for use as an adhesive in the aerospace or automotive fields wherein good low temperature performance properties and improved resistance to impact are desired.
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