Reactive azo dyes
US6762288B2 · kind B2 · utility
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2References
28Claims
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Assignee
Inventor
Key dates
| Filing date | Nov 15, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Nov 15, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B62/4415
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to reactive azo dyes of the formula (I) or an alkali metal salt thereof, wherein A is formula (i) or (ii) C is an optionally substituted aromatic or heteroaromatic residue; and R1, R2, B, D, Y, a, b, c, d and n are defined as given in claim 1, a process for preparing said dyes and a process for colouring fibre material, which comprises applying thereto said dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.