Dyestuffs
US3996221A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1975 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | Jan 9, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B19/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Dyestuffs of the formula ##STR1## WHEREIN (R).sub.n represents n substituents R each of which may be independently halogen, lower alkyl, lower alkoxy or COOH PA1 R.sup.1 is H, optionally substituted lower alkyl, optionally substituted aryl or optionally substituted aralkyl, PA1 n is 0-3, PA1 (a+b) is 0-4, PA1 X is O, S or NR.sup.2, where R.sup.2 is H or optionally substituted lower alkyl, PA1 Y is an optionally substituted aliphatic or optionally substituted araliphatic linking group, and PA1 Each Z is independently a H or a cellulose-reactive group, and when (a+b) is O there is at least one SO.sub.3 H group as substituent on the groups R.sup.1, X or Y. The dyestuffs when both Z are H are valuable acid dyes, e.g. for wool, and when one or both Z are reactive groups the dyestuffs are valuable reactive dyestuff especially for cellulose fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.