The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 02, 1991
Filed:
Oct. 31, 1990
BASF Lacke & Farben AG, Munster, DE;
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.