Reactive dyes containing a linkage
US6359121B1 · kind B1 · utility
3Cited by
0References
9Claims
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Assignee
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Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Mar 19, 2002 |
| Priority date | — |
| Expiry date | Jan 31, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B62/043
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A reactive disazo dye of the formula (I) D1—Y—D2 wherein each of D1 and D2 is a chromophore of the formula (II) in which X is fluorine, chlorine or optionally substituted pyridinium, an SO3H is present in the 5-or 6-position of the naphthalene nucleus, n is 0 or 1, and Y is a bridging group or a sulphonic acid salt of the dye of formula (I). The dyes may be used for dyeing, printing or ink-jet printing, for example, of textile materials and paper and are particularly valuable for coloring cellulosic textile materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.