Soft segment-containing modified epoxy resin and cathodic electr

Details Soft segment-containing modified epoxy resin and cathodic electr Soft segment-containing modified epoxy resin and cathodic electr

1994-05-16

1995-09-05

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

525528, 528110, C08K 320, C08L 6302

Patent

active

054479738

ABSTRACT:
Diglycidyl ether epoxy resins are reacted with a prepolymer produced from an organic diisocyanate and a bifunctional active hydrogen compound having a soft segment whose terminal isocyanate groups have been blocked to chain-extend the epoxy resin with the prepolymer. The chain-extended epoxy resin is then reacted with a cationic active hydrogen compound alone or incombination with an aliphatic monoalcohol, alkylphenol, glycol monoether or bisphenol to open the terminal epoxy rings of the chain extended epoxy resin. The modified epoxy resin thus produced is dispersed in an aqueous medium containing a neutralizing agent together with a crosslinker to give a cathodic electrodeposition paint having improved impact strength and other properties.

REFERENCES:
patent: 5276072 (1994-01-01), Ishii et al.

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