Waterborne basecoat with copolymer dispersant composition for in

Details Waterborne basecoat with copolymer dispersant composition for in Waterborne basecoat with copolymer dispersant composition for in

1995-05-23

1998-01-13

Buffalow, E. Rollins

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

4284231, 428403, 428407, 428689, 525131, 525222, 525440, C08F 830

Patent

active

057080860

ABSTRACT:
The present invention is directed to a pigment dispersant composition for use with inorganic pigments in coating compositions. The dispersant composition includes a vinyl or acrylic copolymer and a transition metal or rare earth metal salt. The metal salt in combination with the copolymer is useful with inorganic pigment as it lowers the viscosity of the pigment dispersions, thus allowing a higher concentration of pigment in the dispersion and consequently providing dispersions with higher non-volatile content and higher pigment to binder ratios. The presence of the metal salts in the dispersant composition when used with surface coated metal flake pigment provides excellent corrosion reduction of the metal pigment, indicated by the reduction or elimination of hydrogen gassing by the pigment in a coating composition.

REFERENCES:
patent: 4385097 (1983-05-01), Isozaki et al.

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