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:
Sep. 12, 1978
Filed:
Feb. 02, 1977
Hermann Fuchs, Kelkheim, Taunus, DE;
Klaus Filzinger, Hofheim, Taunus, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Novel, valuable 1:2-cobalt-complex dyestuffs of the monoazo compound of formula ##STR1## had been found, in which R.sub.1 is halogen, nitro, lower alkyl, a sulfonamide radical or a carbonamide radical, and R.sub.2 and R.sub.3 are alternatively a nitro and sulfo group. These novel dyestuffs are well suitable for the dyeing of natural and synthetic polyamide fibers, especially in admixture with hydrophobic fibers, and also especially advantageously with other 1:2-chromium or 1:2-cobalt-complex dyestuffs containing one or two sulfonic acid groups per dyestuff molecule, yielding even, strong dyeings of high fastnesses to wet processing and to use as well as to light. -- The novel cobalt complex dyestuffs can be prepared by cobalting the above monoazo compound (1) by means of a cobalt yielding agent.