Aminosulfonylphenyl-azo-indolyl dyestuffs

Details Aminosulfonylphenyl-azo-indolyl dyestuffs Aminosulfonylphenyl-azo-indolyl dyestuffs

1975-02-03

1976-12-28

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260156, 26032612R, C09B 2936, D06P 324

Patent

active

040001237

ABSTRACT:
Monoazo dyestuffs which in the form of the free acid correspond to the general formula ##STR1## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 have the meaning given in the description and their use for the dyeing of natural and synthetic fibre materials, especially for dyeing polyamide fibres. Dyeings obtained distinguish themselves by very good fastness to light. Dyestuffs are absorbed well on polyamide fibres already in a neutral to weakly acid dye bath. By polyamide fibres there are here especially understood those from synthetic polyamides such as .EPSILON.-polycaprolactam, or condensation products of adipic acid and hexamethylenediamine.

REFERENCES:
patent: 978439 (1910-12-01), Dresse et al.
patent: 1113622 (1914-10-01), Hauptmann et al.
patent: 1835393 (1931-12-01), Hentrich et al.
patent: 3883502 (1975-05-01), Sommer et al.
United States Published Patent Application, B327,109, 1-28-1975, Wolfrum et al. 260-265.

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