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. 14, 1987
Filed:
Nov. 15, 1985
Applicant:
Inventor:
Joachim Kranz, Ludwigshafen, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C09B / ;
U.S. Cl.
CPC ...
540136 ; 540137 ; 540138 ;
Abstract
Finely divided, agglomerated crude polyhalo-copper phthalocyanine is recrystallized (conditioned) by heating the crude pigment with benzoic acid, toluic acid, ethylbenzoic acid or a mixture of these, in the presence of water, at from 80.degree. to 130.degree. C. The resulting polyhalo-copper phthalocyanine pigments are readily dispersible and of high color strength, and pigmentary forms ranging from transparent to high-hiding can be obtained in a selective manner. The carboxylic acids used as conditioning media can readily be recovered by acidifying the mother liquor.