Sulfonic-acid substituted disazo dyestuffs

Details Sulfonic-acid substituted disazo dyestuffs Sulfonic-acid substituted disazo dyestuffs

1974-10-09

1977-02-15

Wyman, Daniel E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260180, 260182, 260184, 260186, C09B 3508, C09B 3302, C09B 3102, D06P 306

Patent

active

040082156

ABSTRACT:
Dyestuffs of the formula: ##STR1## are described, wherein K denotes the radical of a coupling component KH which can belong to the benzene, naphthalene or heterocyclic series. The dyestuffs are prepared by one-sided coupling of tetrazotized 4,4'-diamino-2,2'-dimethyldiphenyl with 2-hydroxynaphthalene-8-sulphonic acid in an alkaline medium, and reaction of the intermediate stage with the coupling component KH. The dyestuffs are useful for dyeing natural and synthetic, especially nitrogen containing fibre, materials such as wool and polyamides, including poly-.epsilon.-caprolactam or condensation products of adipic acid and hexamethylene diamine.

REFERENCES:
patent: 521095 (1894-06-01), Bernthsen et al.
patent: 534573 (1895-02-01), Paganini
patent: 1071832 (1913-09-01), Wagner et al.
patent: 1071833 (1913-09-01), Wagner et al.
patent: 1904821 (1933-04-01), Brightman
patent: 2021917 (1935-11-01), Mendoza
Colour Index, Third Edition, vol. 4, 1971, p. 4186 (23,255 and 23,260).
Colour Index, Third Edition, vol. 4, 1971, p. 4187 (23,280), p. 4194 (23,685) and p. 4195 (23,720).
Colour Index, Third Edition, vol. 4, 1971, p. 4195 (23,715).

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