Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1993-07-28
1996-01-16
Buttner, David
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525458, 525524, 525526, 525528, 528 73, C08F28304
Patent
active
054848539
ABSTRACT:
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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"Selecting Structural Adhesives for Temperature Extremes", Materials Engineering May 1978, pp. 45-47, 1980.
"Polyurethanes as Cryogenic Adhesives", Journal of Applied Polymer Science, vol. 9, pp. 3909-3916, 1965.
Chen Der-Shyang
Hsia Hung-Chung
Ma Chen-Chi M.
Wang Wang-Nang
Buttner David
China Technical Consultants Inc.
Gulakowski Randy
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