1:2-cobalt-complex azo dyestuffs, process for their...

Details 1:2-cobalt-complex azo dyestuffs, process for their... 1:2-cobalt-complex azo dyestuffs, process for their...

C - Chemistry, Metallurgy

09

B

8/21.4, 260/167.

C09B 45/20 (2006.01) D06P 1/10 (2006.01)

Patent

CA 1075681

Abstract of the disclosure: Novel, valuable 1:2-cobalt-complex dyestuffs of the monoazo compound of formula (1) Image (1) had been found, in which R1 is halogen, nitro, lower alkyl, a sulfonamide radical or a carbonamide radical, and R2 and R3 are alternatively a nitro and sulfo group. These novel dye- stuffs are well suitable for the dyeing of natural and syn- thetic polyamide fibers, especially in admixture with hydro- phobic 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.

276069

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