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:
Mar. 10, 1981
Filed:
Jan. 29, 1980
Joachim Kranz, Ludwigshafen, DE;
Reinhard Sappok, Heidelberg, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A pigment formulation which comprises (a) a finely divided organic pigment and (b) one or more urea derivatives of the formula K--(NH--CO--NH--R).sub.2, where R is C.sub.12 -C.sub.18 -alkyl, C.sub.12 -C.sub.18 -alkenyl, C.sub.8 -C.sub.18 -alkoxypropyl or --(CH.sub.2).sub.3 --O--(C.sub.2 H.sub.4 O).sub.n --R.sup.1, R.sup.1 is C.sub.2 -C.sub.8 -alkyl or phenyl, n is 1, 2, 3 or 4 and K is 1,5-naphthylene or 4,4'-diphenylenemethane, with or without (c) up to 5% by weight, based on (a and b), of agents conventionally present in pigment formulations. In binder solutions, the pigment formulations give printing inks and paints possessing excellent tinctorial properties. Some of the compounds (b) prevent the conversion of .alpha.-copper phthalocyanine to the .beta.-modification.