Compositions for forming epoxy adhesive containing acrylate rubb

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525107, C08L 1300, C08L 5108, C08L 6300

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active

045658536

ABSTRACT:
Reaction mixtures for forming curable epoxy resin compositions comprise an epoxy resin, a monoethylenically unsaturated monomer capable of forming polyacrylate rubber, a chain transfer agent to allow for higher levels of rubber in the curable epoxy resin without undesired viscosity increase and/or gellation, and a monomer soluble initiator. Optional ingredients include a crosslinking agent for the rubber-forming monomer, a grafting agent for rubber and epoxy resin, and an epoxy curing agent, preferably having activation conditions which are not satisfied when the initiator is activated. Heating the reaction mixture gives epoxy resin compositions containing polyacrylate rubber, the latter being optionally crosslinked and/or grafted to the epoxy resin. Activation of the curing agent, e.g., by heating, when such curing agent is present, yields cured adhesive compositions.

REFERENCES:
patent: 4028432 (1977-06-01), Dawans et al.
patent: 4051193 (1977-09-01), McWhorter
patent: 4119592 (1978-10-01), Murphy
patent: 4129670 (1978-12-01), Riew
patent: 4146452 (1979-03-01), Weber et al.
patent: 4308185 (1981-12-01), Evans et al.
Chemical Abstracts: 64497x, "Radioselling Epoxy Resins", (1973).
Mark et al., "Elastomers and Rubber Elasticity", ACS Symposium Series, pp. 10-12, Aug. 1981.

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