China Technical Consultants, Inc.

Hung-Chung Hsia

Chen-Chi Martin Ma

Der-Shyang Chen

Wang-Nang Wang

A two-part adhesive composition having superior adhesive strength at cryogenic temperatures contains a urethane resin composition part and a hardener part. The urethane resin composition part comprises 50 to 99% by weight of a modified polyurethane prepolymer having an epoxy group at each of its respective ends and 1 to 50% by weight of a modified urethane compound having substantially no ether cyanate (NCO) groups and at least two epoxy groups per molecule and a molecular weight of less than 800 daltons. The hardener part is a polyamine containing primary or secondary amine groups. The equivalent ratio of the amine groups of the polyamine to the epoxy groups of the urethane resin composition part is 0.5 to 2.0.

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Tao-Yuan Hsien, Taiwan

Hung-Chung Hsia