Metallized bis-formazans

Details Metallized bis-formazans Metallized bis-formazans

1976-11-11

1979-06-12

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260145C, 260146R, 260146D, 260147, 260148, 260149, 260193, C09B 4548

Patent

active

041580036

ABSTRACT:
Heavy-metal-containing bisformazan dyestuffs of the formula ##STR1## WHEREIN A.sub.1, A.sub.2, B.sub.1 and B.sub.2 are the same or different and each represents an unsubstituted or substituted o-phenylene radical or an o-naphthylene radical,
R.sub.1 and R.sub.2 are the same or different and each represent a monovalent organic radical,
Me.sub.1 and Me.sub.2 each represent nickel or copper,
X.sub.1 and X.sub.2 are the same or different and each represents a metal-binding substituent connected to A.sub.1, B.sub.1, A.sub.2 or B.sub.2 in a position ortho to that to which the nitrogen is linked,
Y represents the radical of a dibasic carboxylic acid or a radical which is derived from an, at least, bifunctional heterocyclic compound,
Z represents a salt-forming water-solubilizing group, dissociating acid in water, selected from --SO.sub.3.sup..crclbar. M.sym. and --COO.sup..crclbar. M.sup..sym.
wherein M.sup..sym. represents a cation,
N represents a number from 2 to 6, and
Wherein aromatic radicals present may contain further substituents known per se for use in azo dyestuffs, and wherein the grouping --NH--Y--HN-- is bound directly or via a bridging member to a ring carbon atom of A.sub.1, A.sub.2, B.sub.1, B.sub.2, R.sub.1 or R.sub.2 ,
which bis-formazans are substantive dyestuffs suitable for the dyeing or printing of textile material made from natural or regenerated cellulose. The aforesaid bis-formazan dyestuffs are distinguished by high coloring strength and substantivity to cellulose textile material. The dyeings obtained therewith are of a pure shade of color and have good fastness properties, especially to light and wet.

REFERENCES:
patent: 3068219 (1962-12-01), Beffa et al.
patent: 3244690 (1966-04-01), Steinemann
patent: 3547901 (1970-12-01), Lienhard et al.

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