Azo dyestuffs containing -SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H and -N(CH.sub.2 CH.sub.2 OSO.sub.3 H).sub.2 groups
US4271072A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Aug 13, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/0803
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Water-soluble dyestuffs are disclosed which, in the form of the free acid, have the formula ##STR1## wherein R.sub.1 is selected from the group consisting of H, alkyl having 1-4carbon atoms, cyanoalkyl having 2-4 carbon atoms, hydroxy alkyl having 2-4 carbon atoms or a sulfuric acid ester of a hydroxy alkyl having 2-4 carbon atoms; R.sub.2 is selected from the group consisting of H, methyl, ethyl, methoxy or ethoxy; R.sub.3 is selected from the group consisting of H, halogen, methyl, ethyl, methoxy, ethoxy, or carbonamido having 1-4 carbon atoms; PA1 R.sub.4 is selected from the group consisting of H, methyl, ethyl, methoxy or ethoxy; and PA1 R.sub.5 is selected from the group consisting of H, methyl, ethyl, methoxy or ethoxy. These dyestuffs are suitable for dyeing and printing cellulose fiber materials and polyamide fibers according to known methods of applying and fixing fiber-reactive dyestuffs and are distinguished by outstanding fastness properties such as fastness to light, wet processing and acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.