Heat-sensitive recording material
US5866293A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1997 |
| Grant date | Feb 2, 1999 |
| Priority date | — |
| Expiry date | May 21, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/54
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A heat-sensitive recording material having excellent light-fastness and raw stock storability is disclosed. The material includes a support and a heat-sensitive recording layer provided on the support, and the heat-sensitive recording layer contains a diazo compound and a coupler. The coupler contains at least one species of pyrazolone compounds represented by the following formula (1): ##STR1## wherein Ar represents a phenyl group, a naphthyl group, or an aromatic heterocyclic group, any one of which may have a substituent bonded to the nucleus, said substituent may be a halogen atom, a cyano group, a trifluoromethyl group, an alkyl group, an aryl group, an alkoxycarbonyl group, a carbamoyl group, or a sulfamoyl group; R.sup.1 and R.sup.2 independently represent an alkyl group, an alkenyl group, or an aryl group, or R.sup.1 and R.sup.2 may be linked to each other so as to form a heterocycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.