Back to results
US 4,519,802 AGranted
Use of 1:2 cobalt complex dyes for dyeing leather or furs
AssigneeCiba-Geigy Corporation
InventorAlois Puntener
Life of this patent
Estimating the term…
Abstract
The dyes of the formula I indicated in patent claim 1 are suitable for dyeing furs and especially leather. They are preferably used as a mixture with a blue dye and a red dye for dyeing leather by the trichromatic process.
Claims5
A method of dyeing leather or furs, comprising the step of applying thereto a dye composition whose active dyeing ingredient consists essentially of a dye of the formula ##STR21## in which Ka.sup..sym. is a cation and Y is methyl, --CONH.sub.2 or --CO--NH--R, R being an alkyl group having 1-4 carbon atoms, wherein at least one of the sulfo groups is located in a diazo component.
Dependencies are inferred from the claim text.