Water-soluble tetrakisazo dyestuffs derived from 4,4'-diaminoazo

Details Water-soluble tetrakisazo dyestuffs derived from 4,4'-diaminoazo Water-soluble tetrakisazo dyestuffs derived from 4,4'-diaminoazo

1977-11-14

1979-10-02

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260166, 260169, 260173, C09B 3124, C09B 3126, C09B 3130, D06P 332

Patent

active

041698312

ABSTRACT:
Dyestuffs of the formula: ##STR1## in which C.sub.2 represents the radical of the formula: ##STR2## where X is NH.sub.2 or OH, C.sub.1 and C.sub.3 are different residues of molecules C.sub.1 H and C.sub.3 H free from azo groups and selected from the group consisting of acetylacetic derivatives, pyrazolonic derivatives, benzenic derivatives, and naphthalenic derivatives, only one of the molecules C.sub.1 H and C.sub.3 H being a naphthalenic derivative, one at least of the residues C.sub.1 and C.sub.3 having at least one and at most two sulphonic acid groups, and n having the value 0 or 1 and leather colored with such dyestuffs.

REFERENCES:
patent: 2018764 (1935-10-01), Paine
patent: 2027206 (1936-01-01), Smith et al.
patent: 2106876 (1938-02-01), Schubert
patent: 2116206 (1938-05-01), Krzikalla et al.
patent: 2259735 (1941-10-01), Crossley et al.
patent: 3634390 (1972-01-01), Sommer et al.
patent: 3917887 (1975-11-01), Stiller

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