Water-soluble disazo dyestuffs and process for coloring synthetic polyamide fibres with them
US4194883A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1978 |
| Grant date | Mar 25, 1980 |
| Priority date | — |
| Expiry date | Aug 23, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B43/132
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-soluble disazodyestuffs of the formula ##STR1## in which R.sub.1 and R.sub.2 are identical or different and each is hydrogen, methyl, ethyl or methoxy, and R.sub.3 is hydrogen, chlorine, nitro or alkyl of 1 to 4 carbon atoms, and their salts have been found which possess very good dyeing characteristics and are very well suitable for dyeing of synthetic polyamides and yield dyeings on these fibers with good to very good wet fastnesses and fastnesses to processing and to use. In accordance with this, an improved process had been found for coloring synthetic polyamide fibres by applying the above dyestuffs of the invention on said fibres in usual dyeing and printing methods and fixing them on the fibre by methods as usual in the art.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.