Water-soluble 1:2-cobalt complex dyestuffs, process for...

Details Water-soluble 1:2-cobalt complex dyestuffs, process for... Water-soluble 1:2-cobalt complex dyestuffs, process for...

C - Chemistry, Metallurgy

09

B

260/161.3, 260/1

C09B 45/10 (2006.01) C09B 55/00 (2006.01)

Patent

CA 1076105

Abstract of Disclosure Novel, valuable unsymmetrical 1:2-cobalt complex dye- stuffs on an azo and an azomethine compound have been found which are well suitable for the dyeing of natural and synthe- tic polyamide fibres yielding even dyeings of high fast- nesses to wet processing and use as well as to light. The novel dyestuffs can be prepared either by cobalting the equi- molar mixture of the metalfree azo and azomethine dyestuffs with a cobalt-yielding compound at a pH of 5 to 10 at 60 to 150°C, or by first cobalting the azomethine compound and them reacting it with the equimolar amount of the metal free azo compound.

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