Stable aqueous liquid composition of reactive dyes containing .beta.-sulfatoethylsulfonyl groups
US4448583A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 22, 1983 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | Feb 22, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0073
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous, liquid fiber-reactive dye composition which is stable to decomposition is disclosed. The composition consists essentially of 5 to 45% by weight of a water-soluble, fiber-reactive dyestuff having from 1 to 3 .beta.-sulfatoethylsulfonyl (--SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H) groups, or a mixture of such dyestuffs; 0 to 10% by weight of water-soluble inert inorganic salt; and 45 to 95% by weight of water. Said liquid dye composition must have a pH of about 2.5 to about 4.5 and must be substantially free of buffer substances. The liquid dye composition may be stored for long periods of time at 0.degree. to 50.degree. C. with substantially reduced decomposition to the vinylsulfonyl dye form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.