(3,5-diaminophenyl)(2,4-dihydroxyphenyl)methanone and the acid adducts thereof, method for their preparation and use of these compounds for dyeing fibers
US7455697B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Dec 2, 2004 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Jun 3, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The object of the present invention are (3,5-diaminophenyl)(2,4-dihydroxyphenyl)methanone and the acid adducts thereof of formula (I), with 0≦n≧2 and HX denoting an inor-ganic or organic acid,the colorant containing these compounds and a method for producing the compounds of formula (I).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.