Azo compounds, containing a 1,2,4-thiadiazole moiety
US4259236A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1979 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Feb 26, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/0092
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An azo dyestuff which is free from groups conferring solubility in water and has the general formula I ##STR1## in which R denotes hydrogen, halogen, a hydrocarbon radical with up to 18 carbon atoms which is bonded by means of a direct bond or a sulphur or oxygen atom and can be substituted, trifluoromethyl, cyano, dichlorocyanomethyl, chlorodicyanomethyl, tribromomethyl or trichloromethyl or denotes a heterocyclic radical containing nitrogen, Hal is a halogen atom, R.sub.1 is an optionally substituted alkyl group and "acyl" denotes the acyl radical of an organic carboxylic acid, carbamic acid, carbonic acid or sulphonic acid with, preferably up to 0.18 carbon atoms. The new dyestuffs dye polyester fibers in fast red shades.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.