Azo(hydrazo)-anthraquinone compounds
US4216146A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1979 |
| Grant date | Aug 5, 1980 |
| Priority date | — |
| Expiry date | Feb 23, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C8/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Novel azo(hydrazo)-anthraquinone compounds and their preparation are provided. These compounds are of the general formula ##STR1## where R is hydrogen or at least one substituent, T.sub.1 is hydrogen, an hydroxy or alkoxy group or an amino or substituted amino group, R.sub.1 is hydrogen or halogen, an alkoxy, an amino or substituted amino group, an aryl or substituted aryl group, or a group conferring solubility in water and R.sub.2 is a group which comprises an azo linkage and a ballasting group or is a group which completes the hydrazo link and which comprises a ballasting group. The new compounds are useful in the photographic field, especially in the photographic dye diffusion transfer process for the production of photographic images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.