Disazo dyes containing two carbonylamino groups processes for their preparation and their use
US5691459A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1996 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Jul 15, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/924
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Azo dyes of the formula ##STR1## in which R.sub.1 and R.sub.2 independently of one another are unsubstituted or hydroxy-, C.sub.1 -C4-alkoxy- or halogen-substituted C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy; PA1 unsubstituted or C.sub.1 -C4-alkyl-, C.sub.1 -C4-alkoxy- or halogen-substituted phenyl or phenoxy; or PA1 a radical of the formula --N(R.sub.3)R.sub.4, in which R.sub.3 und R.sub.4 independently of one another are hydrogen, C.sub.1 -C.sub.4 -alkyl, or C.sub.2 -C.sub.4 -alkanoyl which is unsubstituted or further substituted in the alkyl part by hydroxyl or C.sub.1 -C.sub.4 -alkoxy, with the proviso that R.sub.1 and R.sub.2 are not simultaneously methyl, produce dyeings with good fastnesses on fibre materials containing nitrogen or containing hydroxyl groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.