Reactive water-soluble azo dyes containing carboxy- or carbamoyl-pydridinium groups for dyeing textiles
US4861344A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1987 |
| Grant date | Aug 29, 1989 |
| Priority date | — |
| Expiry date | Oct 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/922
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-soluble azo compounds having useful fiber-reactive dye properties conforming to the general formula ##STR1## in which: A is phenylene which may be substituted or unsubstituted, or is a radical of the formula ##STR2## in which W is a direct bond or a radical of the formula --CH.dbd.CH-- or --NH--CO--NH-- and R* denotes hydrogen, nitro, sulfo, carboxy, methyl, ethyl, methoxy or ethoxy; PA0 n is the number zero or 1; PA0 B is a radical of the formula ##STR3## where R is equal to carboxy or carbamoyl; M is hydrogen or an alkali metal; and PA0 K is one of five radicals described in the specification, each of which contains a fiber-reactive group. These azo compounds produce fast dyeings on carboxamido- and/or hydroxy-containing materials, in particular cellulose fibers. On cellulose, fast dyeings are also obtained in a weakly acid to neutral medium, for example together with disperse dyes for dyeing a polyester fiber portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.