Trisazo dye containing a diphenylenesulfone structure
US3965087A · kind A · utility
2Cited by
5References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1974 |
| Grant date | Jun 22, 1976 |
| Priority date | — |
| Expiry date | Mar 13, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B35/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A polyazo dye represented by the formula ##SPC1## Wherein A is an optionally substituted aromatic ring; B is an aromatic ring having at least one substituent selected from the group consisting of amino, substituted amino and hydroxy; Y is hydrogen, alkali metal, --NH.sub.4 or amine salt residue; n is 1 or 2; and one of R.sup.1 and R.sup.2 is hydroxy and the other is amino.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.