Vat dyes

Details Vat dyes Vat dyes

1994-10-21

1996-04-09

Einsmann, Margaret

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Sulfur dye or vat dye

546 27, 548417, 8921, 8918, C09B 6728, C07D48700

Patent

active

055057438

ABSTRACT:
Vat dyes obtainable by
a) halogenation of dibenzanthrone with bromine in the presence of chlorosulfonic acid and of a halogenation catalyst to a bromine content from 26 to 32% by weight and a chlorine content from 1 to 5% by weight, and
b) condensation of the isolated halogenation product with 1-aminoanthraquinone in a molar ratio from 1:2 to 1:2.5 in the presence of an inert solvent, the concentration of halogenated dibenzanthrone and 1-aminoanthraquinone together being at least 200 g/l of solvent
are useful for dyeing or printing cellulose-containing textile material.

REFERENCES:
patent: 1856203 (1932-05-01), Wolff
patent: 2232700 (1941-02-01), Fleysher
patent: 2677693 (1954-05-01), Nawiasky et al.
patent: 4547575 (1985-10-01), Tzikas

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