1-Hydroxy-2-arylazo-8-hydrocarbyloxycarbonylaminonaphthalenedisulfonic acids
US4080322A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1976 |
| Grant date | Mar 21, 1978 |
| Priority date | — |
| Expiry date | Jun 18, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula ##STR1## in which R.sub.1 signifies an optionally substituted hydrocarbon radical, PA1 R.sub.2 signifies hydrogen, halogen, nitro, a linear or branched optionally substituted alkyl radical such as haloalkyl, an optionally substituted cycloalkyl radical, alkoxy, alkylthio, an optionally substituted aryl radical, an acyl radical of an aliphatic or aromatic sulphonic or carboxylic acid, an ester or amide group of a sulphonic acid, an ester or amide group of a carboxylic acid, an ester group of a carbamic acid, unsubstituted or mono- or disubstituted amino or an acylamino group, PA1 The ring A may be further substituted, and may as R.sub.2 bear a condensed cycloalkyl radical, but ring A and any substituent on it is free from carboxylic or sulphonic acid groups and from groups in the ortho-position to the azo group which are capable of the formation of metal complexes, Provided that the total number of carbon atoms in R.sub.1 and in the substituent(s) on ring A is from 12 to 30, preferably 12 to 18, in free acid or water-soluble salt form, are useful water-soluble dyes for acid-dyeable non-wovens and textile fibres, leather and paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.