Water dilutable coating compositions

Details Water dilutable coating compositions Water dilutable coating compositions

1990-10-31

1991-07-02

Jacobs, Lewis T.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

106404, 524441, C08K 902, C08K 308

Patent

active

050286390

ABSTRACT:
The invention relates to water-dilutable coating compositions which contain a binder, an aluminum pigment and an aqueous diluent. The water-dilutable coating compositions according to the invention are distinguished in that they contain, as the aluminum pigment, a pigment which has been obtained by passivating a lubricant-containing aluminum pigment in an aqueous passivating solution which contains chromic acid and a water-soluble glycol ether of the general formula R.sup.1 --(--O--CHR.sup.2 --CH.sub.2 --).sub.n --OH (R.sup.1 represents a lower alkyl radical, R.sup.2 represents either an H atom or a lower alkyl radical, preferably a --CH.sub.3 group, and n represents a number from 1 to 5) and/or a water-soluble glycol of the general formula HO--(CHR.sup.3 --CH.sub.2 --O--).sub.n H (R.sup.3 represents either an H atom or a lower alkyl radical, preferably a --CH.sub.3 group, and n represents a number from 1 to 5), at not less than 50.degree. C., preferably 60.degree. to 90.degree. C., particularly preferably about 80.degree. C.

REFERENCES:
patent: 2522538 (1950-09-01), Rethwisch et al.
patent: 3085890 (1963-04-01), Rolles
patent: 4490499 (1984-12-01), Huybrechts
patent: 4693754 (1987-09-01), Kondis

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