Anodic electrocoating of aluminum to obtain improved corrosion r

Details Anodic electrocoating of aluminum to obtain improved corrosion r Anodic electrocoating of aluminum to obtain improved corrosion r

1978-07-14

1982-01-26

Michl, Paul R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

204181R, 260 296H, C08K 310

Patent

active

043128009

ABSTRACT:
There is disclosed an aqueous anodic electrodeposition bath adapted to electrodeposit substantially clear coatings possessing superior corrosion resistance on aluminum substrates in which water has dispersed therein a carboxy-functional polymer at least partially neutralized with a volatile base together with from 0.08 to 0.5 part, per 1000 parts of the bath, of finely divided particles of pigment grade. The carboxyl-functional polymer preferably comprises a copolymer formed by polymerization in aqueous dispersion of the monomers in solution in an appropriate polyhydric alcohol. The pigment is preferably suspended in a carboxyl-functional resin which dissolves in water with the aid of a base. The preferred soluble resin is a copolymer with an oleyl alcohol ether of a polyepoxide and the preferred pigment is barium chromate.

REFERENCES:
patent: 2954358 (1960-09-01), Hurwitz
patent: 3862075 (1975-01-01), Sekmakas
patent: 3953391 (1976-04-01), Dowbenko
patent: 4065415 (1977-12-01), Christenson

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