Cathodic electrodeposition paint forming films having improved s

Details Cathodic electrodeposition paint forming films having improved s Cathodic electrodeposition paint forming films having improved s

1994-11-04

1996-02-13

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

204504, 523410, 524901, C08K 320, C08L 6302, C08L 6304

Patent

active

054911834

ABSTRACT:
A cathodic electrodeposition paint containing a cationically modified epoxy resin and a crosslinker dispersed in an acidic aqueous medium is disclosed which contains an auxiliary resin component which is capable of improving the surface smoothness of the cured paint films and which is a reaction product produced by reacting a t-alkylphenol novolac epoxy resin with an amount of an active hydrogen compound sufficient to open all epoxy rings. When the thus produced auxiliary resin has a hydroxyl group, reaction thereof with a lactone or alkylene oxide, to graft a soft segment to the auxiliary resin improves not only the surface smoothness but also the impact strength of the paint films.

REFERENCES:
patent: 4192929 (1980-03-01), Wingfield, Jr.
patent: 4738995 (1988-04-01), Kooijmans et al.

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