The dyeing of leather with mixtures of trisazo and tetrakisazo c

Details The dyeing of leather with mixtures of trisazo and tetrakisazo c The dyeing of leather with mixtures of trisazo and tetrakisazo c

1985-10-04

1987-05-26

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

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

Leather dyeing

8641, 8681, 8687, C09B 6722, C09B 3322, D06P 106, D06P 332

Patent

active

046682384

ABSTRACT:
A process of dyeing a leather substrate comprising applying to the leather substrate a mixture of at least one compound of the formula ##STR1## and at least one compound of the formula ##STR2## wherein each R is independently ##STR3## wherein: R.sub.3 is hydrogen, --SO.sub.3 M or --COOM, and

REFERENCES:
patent: 3927963 (1975-12-01), Papa et al.
patent: 4468348 (1984-08-01), Wicki

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