Unsymmetrical mono sulfo containing 1:2 azo, azo chromium complex dyes
US4083839A · kind A · utility
3Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 6, 1976 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | Aug 6, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Chromium complex dyes of the formula ##STR1## wherein Z is a nitro group or a chlorine atom, each of R and R.sub.1 is a phenyl radical which is optionally substituted by halogen, low molecular alkoxy, low molecular alkyl or nitro, one of the symbols X.sub.1, X.sub.2 and X.sub.3 is hydrogen and each of the others is hydrogen, a halogen atom, a nitro, methyl or methoxy group and Me.sup.+ is a cation. The dyes are suitable for dyeing and printing natural and synthetic polyamides to produce dyeings which are level and have good fastness to light, washing, fulling, decatizing and carbonizing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.