Process for dyeing natural protein fibres with metallic azo dyes
US4105400A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1976 |
| Grant date | Aug 8, 1978 |
| Priority date | — |
| Expiry date | Mar 29, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P5/006
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for dyeing or printing natural protein fibres in deep, black, brown, and navy blue shades, wherein protein fibres are dyed from an aqueous liquor, in the presence of a levelling agent, with a metal complex of the formula ##STR1## wherein R.sub.1 represents hydrogen, an alkyl, aralkyl or aryl radical, R.sub.2 represents an acryloyl, acetyl or a propionyl radical which is substituted by one or two halogen atoms, Me represents a chromium-III or cobalt-III ion and X represents hydrogen, nitro, chlorine, methyl, methoxy, acetylamino, chloroacetylamino or propionylamino, or the dyestuff is transferred from a support by transfer printing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.