Diazo heat-sensitive recording material comprising hydroxy coumarin as a coupler
US5683850A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1996 |
| Grant date | Nov 4, 1997 |
| Priority date | — |
| Expiry date | Dec 2, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diazo heat-sensitive recording material having excellent raw stock storability and image storage characteristics, which comprises a support having thereon a recording layer comprising a diazo compound, a coupling component and an organic base. The diazo compound is a 4-disubstituted amino-2-alkoxybenzenediazonium salt and the coupling component is a compound represented by the following general formula: ##STR1## wherein R.sub.4, R.sub.5, R.sub.6 and R.sub.7 each represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkyloxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, an alkoxycarbonyl group, an acyloxy group, a carbamoyl group, a sulfamoyl group, a halogen atom, a cyano group or a nitro group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.