Diazo-type recording material comprising a 1-phenyl-3-pyrazolidone(phenidone) as an anti-oxidant
US5407777A · kind A · utility
4Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 1992 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Nov 17, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A diazo-type recording material comprising a support having thereon a recording layer comprising a photosensitive diazo compound enclosed in microcapsules, a coupling component which reacts with said diazo compound by heating at a basic pH to develop a color, and a 1-phenyl-3-pyrazolidone compound represented by the formula: ##STR1## wherein the substituents X, and R.sub.1 -R.sub.4 are defined in the specification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.