Azo dye mixtures and their use for dyeing natural and synthetic polyamide fibers
US5234467A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jul 14, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/924
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a dye mixture comprising at least one dye of the formula ##STR1## in which R.sub.1 and R.sub.2, independently of one another, are hydrogen or substituted or unsubstituted C.sub.1 -C.sub.8 alkyl or phenyl, R.sub.3 is hydrogen or substituted or unsubstituted C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.7 cycloalkyl or phenyl, R.sub.4 is hydrogen or a radical of the formula ##STR2## R.sub.5 is hydrogen or substituted or unsubstituted C.sub.1 -C.sub.8 alkyl or phenyl, and benzene rings I and II may be further substituted, together with at least one dye of the formulae (2) to (6) given in the description. The dye mixtures are suitable for the dyeing or printing of natural and synthetic polyamide fibre materials, in particular in combination with other dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.