1:2-Cobalt-complex azo dyestuffs having an acetoacetylamino diph

Details 1:2-Cobalt-complex azo dyestuffs having an acetoacetylamino diph 1:2-Cobalt-complex azo dyestuffs having an acetoacetylamino diph

1977-02-02

1978-09-12

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260193, C09B 4520

Patent

active

041137191

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.

REFERENCES:
patent: 1844398 (1932-02-01), Kammerer et al.

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