Thermoresponsive microcapsule, heat sensitive recording material and multicolor heat sensitive recording material
US5916680A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Oct 6, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2987
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermo-responsive microcapsule containing a diazo compound or an electron donative dye precursor, wherein the capsule wall of the microcapsule is composed of at least one polymer obtained by polymerization of an isocyanate compound containing an adduct of (A) a compound having one active hydrogen in the molecule and having an average molecular weight from 500 to 20000 and (B) a multifunctional isocyanate having two or more isocyanate groups in the molecule, and a heat-sensitive recording material and a multicolor heat-sensitive recording material comprising a heat-sensitive recording layer containing the microcapsule are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.