Process for the manufacture of vat dyes

Details Process for the manufacture of vat dyes Process for the manufacture of vat dyes

1979-01-15

1981-05-05

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

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

Sulfur dye or vat dye

544189, 544194, C09B 6728, C07D25100

Patent

active

042656338

ABSTRACT:
The invention provides a process for the manufacture of vat dyes of the formula ##STR1## wherein R is alkyl of 1 to 4 carbon atoms and X is an acyl radical, which comprises condensing a diaminoanthraquinone of the formula ##STR2## or mixtures of diaminoanthraquinones of the formula (2), with a 2,4-dihalogeno-6-alkylthio-s-triazine of the formula ##STR3## wherein Y is halogen and R is as defined for formula (1), in the molar ratio 2:1, and condensing the resulting intermediate of the formula ##STR4## with an acylating agent containing the acyl radical X which is as defined for formula (1), in the molar ratio 1:2.

REFERENCES:
patent: 3972881 (1976-08-01), Altermatt

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