Process for producing microcapsule containing diazonium salt compound and photo- and heat-sensitive recording material produced using the same
US5547806A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Dec 21, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/52
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention is directed to a process for producing microcapsules containing a diazonium salt compound by the steps of (i) adding a dialkyl sulfate compound represented by the formula: RO--SO.sub.2 --OR, where R is an alkyl or cycloalkyl group having up to 24 carbon atoms, to an organic solvent solution containing a diazonium salt compound and a polyfunctional isocyanate compound, (ii) emulsifying the resulting organic solvent solution into an aqueous solution of ,a water-soluble polymer, and then (iii) polymerizing the polyfunctional isocyanate compound to form microcapsule walls. The invention also discloses the recording material produced by the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.