Trisazo dyes containing two different aminonaphtholsulphonic aci

Details Trisazo dyes containing two different aminonaphtholsulphonic aci Trisazo dyes containing two different aminonaphtholsulphonic aci

1975-04-11

1977-10-04

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260149, 260159, 260166, C09B 3504

Patent

active

040523802

ABSTRACT:
New direct dyes which can be diazotized on fibers and have the general formula ##STR1## are disclosed. In the formula, A and B, which are different from each other, are amino-naphtholsulphonic acids. A process for making the new dyes by coupling one mole of a tetrazo derivative of 4,4-diamino-azobenzol with a mixture containing substantially one mole of the amino-naphtholsulphonic acid A and one mole of the different amino-naphtholsulphonic acid B, in an alkaline medium, is also enclosed.

REFERENCES:
patent: 2021917 (1935-11-01), Mendoza
patent: 2203196 (1940-06-01), Hanhart
patent: 2286714 (1942-06-01), Chechak

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