Unsymmetrical azomethine 1:2-chromium complex dyes

Details Unsymmetrical azomethine 1:2-chromium complex dyes Unsymmetrical azomethine 1:2-chromium complex dyes

1975-12-29

1978-07-25

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260145C, 260151, 260206, 260207, 260429C, 2604385R, 260507R, 260509, C09B 4516, C09B 5500, C07F 1100

Patent

active

041028791

ABSTRACT:
Compounds of which the anion corresponds to the formula ##STR1## where A is the radical of a carbocyclic amine component containing sulfonic acid groups and having a complex-forming hydroxyl group or carboxyl group in the position adjacent to the azo bridge, B and D are the radical of a carbocyclic aldehyde having a complex-forming hydroxyl group in the position adjacent to the azomethine bond, E is an aliphatic radical or a carbocyclic radical having a complex-forming hydroxyl group or carboxyl group in the position adjacent to the azomethine group and n is the number of carboxyl groups not participating in complex formation and of the sulfonic acid groups. The compounds are outstandingly suitable for dyeing natural and synthetic nitrogenous materials, especially wool and nylons, giving dyeings with excellent light fastness and wet fastness properties, eg. fastness to perspiration, water, sea water and washing.

REFERENCES:
patent: 2116913 (1938-05-01), Schmidt et al.
patent: 2345485 (1944-03-01), Krzikalla et al.
A.P.C. Application of Mueller et al, Ser. No. 391,542, Published Apr. 27, 1943.
Pfeiffer et al, Chem. Ber., vol. 74, pp. 935 to 941 (1941).
Vinkataraman, "The Chemistry of Synthetic Dyes", vol. 1, p. 270 (1952).

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