Unsymmetrical mono-sulfo containing chromium complexes of azo dyes
US3970615A · kind A · utility
2Cited by
0References
5Claims
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Key dates
| Filing date | Dec 24, 1974 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Dec 24, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Chromium complex dyes of the formula ##SPC1## Wherein 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 group, a methyl or a methoxy group, R is a phenyl radical which is optionally substituted by halogen, low molecular alkoxy, alkyl or nitro and Me.sup.+ is a cation are disclosed; said dyes being useful in dyeing synthetic and natural 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.