Heat-sensitive recording material
US5925489A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1998 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Feb 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed is a heat-sensitive recording material comprising a substrate having thereon a heat-sensitive recording layer containing a diazonium salt compound and a coupler, pyrrolo1,2-a! pyrimidine compound, as the coupler, being represented by the following general formula (1): ##STR1## wherein R.sup.1 to R.sup.4 each represents a hydrogen atom, a halogen atom, an aryl group, an alkyl group, a cyano group, an acyl group, a substituted carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an alkoxy group, an aryloxy group, an alkylthio group, or an arylthio group. The diazo-type heat-sensitive recording material, which develops a violet to cyan color, has excellent image stability and image fixing characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.