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. 22, 1988
Filed:
Dec. 21, 1981
Manfred Pesenacker, Kelkheim, DE;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
Compounds of the general formula ##STR1## in which R.sup.1 and R.sup.2 are identical or different and denote hydrogen, chlorine or bromine, methyl, ethyl, methoxy, ethoxy or nitro and K denotes identical or different radicals of enolizable ketomethylene compounds which do not contain groups imparting solubility in water, are obtained by coupling one equivalent of the bisdiazonium compound obtained by bisdiazotizing the diamine of the formula ##STR2## in which R.sup.1 and R.sup.2 have the meaning mentioned above, with 2 equivalents of one or more compounds of the formula KH in which K has the meaning mentioned above. These disazo compounds are pigments which have a high tinctorial strength and good fastness to migration, light, heat and chemicals.