Back to results
US 4,507,125 AGranted
Use of 1:2 chrome complex dyes for dyeing leather and furs
AssigneeCiba-Geigy Corporation
InventorsAlois Puntener, Josef Koller
Life of this patent
Estimating the term…
Abstract
The dyes of the formula I given in claim 1 are suitable for dyeing furs and especially leather. They are preferably used in admixture with one or more suitable yellow, blue or red dyes for dyeing leather in dark shades.
Claims10
A process for dyeing leather or furs, comprising the step of applying thereto a 1:2 chrome complex dye of the formula ##STR14## wherein X is chlorine or nitro, and wherein the sulfo group in the pyrazolone dye is in ring A or B, and the nitro group is in ring A at the 4-, 5- or 6-position of the 1-hydroxy-2-aminobenzene.
Dependencies are inferred from the claim text.