Chromium containing azo dyes
US4029643A · kind A · utility
2Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1972 |
| Grant date | Jun 14, 1977 |
| Priority date | — |
| Expiry date | May 19, 1992 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B45/16
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Chromium containing azo dyes of the general formula (1): ##STR1## wherein one of the phenyl nuclei A, B, D and E is substituted by sulfonic acid group, the nuclei A, B, C, D and E may be substituted by one or more substituents selected from the group consisting of chlorine atom, bromine atom, nitro group, lower alkoxy group and lower alkyl group and M is an alkali metal, possess excellent fastness and give dyeings of unique bright yellow tint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.