Epoxy resin modified with alkanol-blocked prepolymer and bisuret

Details Epoxy resin modified with alkanol-blocked prepolymer and bisuret Epoxy resin modified with alkanol-blocked prepolymer and bisuret

1995-11-09

1997-10-07

Sellers, Robert E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523404, 525453, 525454, C08K 504, C08L 6302, C08L 7508

Patent

active

056749252

ABSTRACT:
A diglycidyl ether epoxy resin is reacted with a blocked prepolymer having a soft segment and an asymmetric bisurethane having a first urethane group with a lower alkanol and a second urethane group with a monohydroxyl compound capable of enhancing thermoflowability. The product is then reacted with a cationic active hydrogen compound such as amines to open the remaining epoxy rings. The modified epoxy resin thus produced is dispersed in an aqueous medium containing a neutralizing agent together with a blocked polyisocyanate crosslinker to give a cathodic electrodeposition paint having improved impact strength and thermoflowability.

REFERENCES:
patent: 3886228 (1975-05-01), Bolger
patent: 4296167 (1981-10-01), Ceintrey
patent: 4435558 (1984-03-01), Burba et al.
patent: 4496672 (1985-01-01), Batzill et al.
patent: 4803257 (1989-02-01), Goel
patent: 5138011 (1992-08-01), Markusch et al.
patent: 5447973 (1995-09-01), Yamada et al.

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