Azo dyes, their preparation and the use thereof
US5196520A · kind A · utility
1Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1991 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | Jan 18, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/241
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to azo dyes of formula ##STR1## wherein R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl, R.sub.2 is C.sub.2 -C.sub.4 alkyl, R.sub.3 is hydrogen, C.sub.1 -C.sub.4 alkyl or unsubstituted or substituted C.sub.5 -C.sub.7 cycloalkyl or phenyl, and the benzene rings I and II are unsubstituted or substituted. The azo dyes are suitable for dyeing or printing synthetic polyamide materials, especially in conjunction with other dyes and, preferably, from short liquors. The azo dyes have good allround properties, in particular good affinity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.