Process for the preparation of 1-aminobenzene-5-.beta.-sulfatoethylsulfone-2,4-disulfonic acid, the 5-vinylsulfone compound and the alkali salts thereof
US4372892A · kind A · utility
3Cited by
2References
2Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 24, 1981 |
| Grant date | Feb 8, 1983 |
| Priority date | — |
| Expiry date | Jun 24, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B62/503
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New compounds had been found which correspond to the formula ##STR1## as well as processes for preparing them by sulfonation of 3.beta.-sulfato- or 3-.beta.-hydroxyethylsulfonyl - aminobenzene. The novel compounds are valuable intermediary products for the preparation of azo fibre-reactive dyestuffs which have very good dyeing properties and a high fibre-reactivity yielding dyeings of excellent fastnesses, especially to light and wet processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.