1:2 chromium or cobalt metal complex dyes and use thereof for dyeing leather
US4710198A · kind A · utility
7Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Dec 1, 1987 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/924
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process of dyeing polyamide-containing material is disclosed using dyes of the following formula: ##STR1## wherein Me is cobalt or chromium, PA0 Ka.sup..sym. is a cation, PA0 p is 0 or 1, PA0 R and R' are each independently of the other hydrogen or a group of the formula --CO--(O).sub.n --Y, where PA1 n is 0 or 1, and PA1 Y is C.sub.1 -C.sub.5 alkyl, or phenyl which may be substituted by nitro, halogen, C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 alkoxy, PA0 with the proviso that R and R' may not both be hydrogen if p is 1. Novel dyes within this class are also disclosed. The process is especially useful for dyeing leather.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.