Process for dyeing leather with dye mixtures

Details Process for dyeing leather with dye mixtures Process for dyeing leather with dye mixtures

1993-03-26

1994-10-11

Klemanski, Helene

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Leather dyeing

8436, 8639, 8641, 8643, D06P 332, C09B 6700

Patent

active

053543416

ABSTRACT:
Leather is dyed using dye mixtures comprising at least two metal-free dyes each carrying a single sulfo or carboxyl group and having a molecular weight in the range from 450 to 700.
It is preferred to use a trichromatic dyeing formulation comprising at least one yellow dye of formula (1), at least one red dye of formula (2) and at least one blue dye of formula (3) according to claim 2.
Leather is dyed in brilliant shades with these dye mixtures.

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Chem. Abst. 102: 8244C, 1985.
Textiles vol. 90, 88722d (1979).
The Chemistry of Synthetic dyes K. Venkataraman, vol. I pp. 405-408, 1952.

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