Unsymmetrical phenyl azo naphthyl chromium complex dyes
US4053462A · kind A · utility
6Cited by
8References
1Claims
0Family size
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Key dates
| Filing date | Aug 4, 1976 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | Aug 4, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Chromium complex dyes which, in the form of their free acid, have the formula ##STR1## wherein one X represents the sulphonic acid group and the other X represents the nitro group, Y is a sulfone or sulfonamide group and Z is an acyl group. The dyes are suitable for dyeing natural and synthetic polyamides to produce dyeings which are level and have good fastness to light, perspiration, fulling, decatizing and carbonizing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.