1:2-cobalt-complex azo dyestuffs, their preparation and...

Details 1:2-cobalt-complex azo dyestuffs, their preparation and... 1:2-cobalt-complex azo dyestuffs, their preparation and...

C - Chemistry, Metallurgy

09

B

8/21.4, 260/167.

C09B 45/34 (2006.01) C09B 45/20 (2006.01) D06P 1/39 (2006.01) D06P 3/24 (2006.01)

Patent

CA 1073450

Abstract of the Disclosure: Water-soluble cobalt complex azc dyestuffs of the formula Image in which R1 is chlorine or nitro, R2 is methyl, ethyl, methoxy or ethoxy and R3 is methoxy or ethoxy, had been found, as well as a process by preparing them by diazotization, coupling and cobalting, which are very valuable for the dyeing of poly- urethane, natural and synthetic polyamide fibers, dyeing them level, constant shades of good fastnesses to wet processing and to light.

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