Benzisothiazole and indazole azo compounds
US3985726A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1973 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Nov 21, 1993 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B29/3634
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An azo compound free of sulphonic acid groups, of the formula ##SPC1## Wherein B is the radical of a coupling component of the phenol or naphthol, pyrazolone, pyridone, aminopyrazole, enolisable keto compound or alkylaniline series and Y is a sulphur atom or a nitrogen atom, R represents a hydrocarbon radical or a hydrogen atom, and n =1 or 2, n being 1 if Y= --S-- and n being 2 if Y= --N=, and wherein the ring D can carry yet further substituents and the dyestuff molecule contains at least one carboxyl group, and useful in dyeing and printing leather, wool, silk and synthetic fibers such as acrylic, acrylonitrile, polyamide and especially aromatic polyester fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.