Mixtures of oil-soluble phenyl- and naphthyl-azo-phenyl dyestuff

Details Mixtures of oil-soluble phenyl- and naphthyl-azo-phenyl dyestuff Mixtures of oil-soluble phenyl- and naphthyl-azo-phenyl dyestuff

1972-11-20

1978-04-04

Higel, Floyd D.

Bleaching and dyeing; fluid treatment and chemical modification

Treatment of hides, skins, feathers and animal tissues

Tanning

44 59, 208 12, 260196, 260197, 260205, C10L 110, D06P 100, D06P 300

Patent

active

040825019

ABSTRACT:
Mixtures of dyestuffs of the formula ##STR1## wherein R.sub.1 and R.sub.2 are hydrogen, lower alkyl or lower alkoxy and A is hydroxy phenyl or .beta.-hydroxy naphthyl. These dyestuff mixtures are prepared in usual manner by diazotizing and coupling. They allow to prepare highly concentrated mother solutions in hydrocarbons which are useful for coloring hydrocarbons, oils, fuels.

REFERENCES:
patent: 211671 (1867-01-01), Roussin et al.
patent: 1590728 (1926-06-01), Dorrer
patent: 2087282 (1937-07-01), Friedrich et al.
patent: 2156446 (1939-05-01), Bock
patent: 2173920 (1939-09-01), Siegel
patent: 2174501 (1939-09-01), Reich
patent: 2224574 (1940-12-01), Martone
patent: 2224904 (1940-12-01), Elley et al.
patent: 2237772 (1941-04-01), Twitchett
patent: 3049533 (1962-08-01), Spitzer et al.
patent: 3356443 (1967-12-01), Dziomba
patent: 3476500 (1969-11-01), Litke

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