Trisazo compounds containing a diphenyl-tetrazinyl component
US3951941A · kind A · utility
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3Claims
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Assignee
Inventors
Key dates
| Filing date | Mar 13, 1974 |
| Grant date | Apr 20, 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 aromatic ring having or not having a substituent, B is an aromatic ring having at least one substituent selected from the group consisting of amino, substituted amino and hydroxyl, Y is hydrogen, alkali metal, --NH.sub.4 or an amine salt residue, n is 1 or 2, and each of R.sup.1 and R.sup.2 is hydroxyl or amino, R.sup.1 being amino when R.sup.2 is hydroxyl and hydroxyl when R.sup.2 is amino. The polyazo dye has outstanding utility in the dyeing of fibers having hydroxyl and/or amide groups and are not carcinogenic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.