Pigment grinding resin composition for electrodeposition paint a

Details Pigment grinding resin composition for electrodeposition paint a Pigment grinding resin composition for electrodeposition paint a

1995-01-09

1997-03-18

Marquis, Melvyn I.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

C08K 320, C08L 6302

Patent

active

056123957

ABSTRACT:
A pigment grinding resin composition for an electrodeposition paint comprising a cationic pigment grinding resin obtained by reacting a modified epoxy resin with sulfide in the presence of a monobasic acid and a hydroxyl group-containing dibasic acid, wherein said modified epoxy resin is obtained by reacting at least one epoxy resin having an epoxy equivalent of 150 to 2000 selected from the group consisting of bisphenol A, F and S type epoxy resins with a half-blocked diisocyanate, and wherein said sulfide is selected from the group consisting of 1-(2-hydroxyethylthio)-2-propanol, 1-(2-hydroxyethylthio)-2-butanol and 1-(2-hydroxyethylthio)-3-butoxy-1-propanol. By introducing the acid group into the epoxy resin, the dispersibility of the pigment and the compatibility with the main binder, etc., is improved. By using this pigment grinding resin, a pigment paste, as well as an electrodeposition paint can be produced having excellent storage stability and excellent corrosion resistance in respect to films produced therefrom.

REFERENCES:
patent: 5401782 (1995-03-01), Kawakami et al.

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