Clariant Finance (Bvi) Limited

Jose Rocas

Manuel Jose Domingo

Jordi Berenguer

Azo dyes containing sulphur dye entities as a constitutional component are dyes of valuable properties, in particular for the dyeing of leather.

Azo dyes, their production and use

A cationic dye (S.sub.K) comprising at least one quaternary ammonium group or protonated or protonizable tertiary amino group and at least one chromophoric radical, wherein the chromophoric radical is the radical of an optionally (pre)reduced sulphur dye, its precursor (S.sub.K1) containing a cationic group which is a secondary amino group of basic character, which is optionally protonated but does not contain an acid group in a substituent of this cationic group, or a mixture thereof and desolubilized derivatives thereof or of their non-quaternized and non-tertiary precursors, which in standardized form are usable as pigments.

Growing community of inventors

Reutlingen, Spain

Jose Rocas