Water-soluble dyestuffs, processes for their manufacture, their use as fiber-reactive dyestuffs for dyeing and printing fiber materials and the fiber materials dyed with these dyestuffs
US4242258A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1979 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | Feb 21, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B62/513
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-soluble dyestuffs are described which in the acid form possess the formula ##STR1## wherein D is a benzene or naphthalene nucleus, R.sub.1 is linked to D in ortho-position to the azo group and means hydrogen, halogen, lower alkoxy, lower alkyl, carboxy or sulfo, R.sub.2 is hydrogen, halogen, lower alkyl, lower alkoxy or sulfo and X is the vinyl group or a sulfato-, chloro- or thiosulfatoethyl group, A is a bridging member preferably selected from the diphenylene, diphenylsulfone and diphenylamine series, Z and Z.sup.1 each represent a hydroxy or amino group with the proviso that each Z and each Z.sup.1 have the same meaning. These novel dyestuffs are prepared by diazotization and coupling of the corresponding diazo and coupling components in usual manner known in the art. The novel dyestuffs possess a very valuable fiber-reactivity and are suitable for dyeing natural and regenerated cellulose or natural, regenerated or synthetic polyamide fiber materials. They can easily be applied and fixed by application methods usual and known in the art, and yield on these fiber materials dyeings and prints which possess good fastnesses, especially fastnesses to light, to washing, to pers…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.