Phenylazonaphtholsulfonic acids having a substituted anilino group in the 6-position of the naphthalane ring
US3948879A · kind A · utility
3Cited by
4References
3Claims
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Key dates
| Filing date | Jul 11, 1973 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Jul 11, 1993 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/046
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula ##SPC1## Wherein EACH OF R and R.sub.1 independently is halo, R.sub.2 is hydrogen or halo, R.sub.3 is halo or --OR.sub.4, and R.sub.4 is alkyl or substituted alkyl, And chromium complexes thereof. The monoazo compounds are particularly useful for dyeing natural and synthetic polyamide fibers by producing a chromium complex thereof on the fiber by treating the fiber with 2 moles of the monoazo compound and simultaneously or subsequently treating the fiber with 1 to 2 moles of a chromium-donating compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.