Substituted 1,2,4-triazoles as DIR compounds and their use in photographic materials
US4362878A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 1980 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Jun 12, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/158
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Development inhibitor releasing compounds of the formula: ##STR1## are provided wherein R.sub.1 is hydrogen or a substituent which may contain a long chain ballasting group and n is 1 or 2, or R.sub.1 may form an annelated ring, R.sub.2 is hydrogen or alkyl having 1 to 4 carbon atoms, R.sub.3 is alkyl, aryl or aralkyl, Y is hydrogen, halogen, optionally substituted phenyl, --COOR.sub.4, --COR.sub.4, ##STR2## or --OR.sub.4 where R.sub.4 is alkyl or aryl or a group ##STR3## where Z represents the atoms necessary to complete an optionally substituted 5- or 6-membered heterocyclic ring which optionally may be benzannelated. The new DIR-compounds form colorless compounds when reacted with the oxidation products of the color developing agent. They have an extremely high reactivity with the oxidation products of the color developing agent so that only small quantities of the DIR-compounds are required to produce excellent intra-image and inter-image effects of excellent speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.