Reactive dye compounds
US6716969B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2001 |
| Grant date | Apr 6, 2004 |
| Priority date | — |
| Expiry date | Nov 8, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B62/513
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A reactive dye compound comprising:(a) at least one chromophore moiety(b) at last one SO2C2H4 group which is attached to the chromophore moiety either direcly via the sulphur atom of the SO2C2H4 group or a linking group L;characterized in that at least one SO2C2H4 group is substituted on its terminal carbon atom with at least one Y group wherein Y is —A(CO)R* wherein A is selected from O or S and wherin R′ contains at least one terminal nucleophilic group, such as OH, NH2, SH, COOH, N, NHR1 and NR1R2 wherein R1 and R2 may be the same of different and may be selected from C1-C4 alkyl; and salts therof. Also claimed is a process of manufacture of the compounds herein and products obtainable by the process.The compounds herein have high Exhaustion Values (E), high Fixation Values (F) and high Efficiency Values (T) and show significant improvements in terms of reducing spent dyestuff in effluent increasing dye affinity to the substrate, increasing the dye-substrate covalent bonding, increasing the ability to dye substrates at room temperature, decreasing the amount of dye that is removed during the post dyeing “soaping off process” and therefore simplifying the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.