Cationic dyes, their production and use

Details Cationic dyes, their production and use Cationic dyes, their production and use

1996-03-11

1998-06-16

Einsmann, Margaret

Bleaching and dyeing; fluid treatment and chemical modification

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

Sulfur dye or vat dye

8436, 8919, 8606, D06P 130

Patent

active

057662690

ABSTRACT:
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.

REFERENCES:
patent: 4801303 (1989-01-01), Carlough et al.
patent: 4941923 (1990-07-01), Sotogoshi et al.
patent: 5300148 (1994-04-01), Domingo et al.
Schreiner, "Post-Alkylation of Sulfur Dyes in the Continuous dyeing process," Textiltechnik 25 (1), pp. 47-57 (1975).
"The Modification of Sulphur Dyes". Part II, H. Rath and W. Wagner, Palette, (ed. Sandoz AG) (1959), vol. 2, pp. 23-27.

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