Heat-sensitive record material
US5091359A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1990 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Feb 5, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/333
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The heat-sensitive record material, in which color images are produced by a color-forming reaction between a colorless or pale colored basic chromogenic material and a color developer, comprises a novolac-type epoxy resin or a diphenyl sulfone derivative represented by the formula (III) in the color forming reaction system. In the former case, it is preferable to use a novolac-type epoxy resin represented by the formula (I) together witha a compound represented by the formula (II) and, in the latter case, the desired effects can be obtained by using 3-dibutylamino-6-methyl-7-phenylaminofluoran as the basic chromogenic material. ##STR1## wherein X is halogen or alkyl having C.sub.1 to C.sub.5, and a is an integer of 0 to 4; and n is an integer of 0 to 20, each of R.sub.1 .about.R.sub.6 is hydrogen, halogen, C.sub.1-5 alkyl or C.sub.1-5 alkoxyl, R.sub.7 is ##STR2## R.sub.10 is hydrogen or alkyl; each of p and q is 0 or an integer of 1 to 5; each of r and s is an integer of 1 to 5; each R.sub.8 and R.sub.9 is halogen, alkyl or alkoxyl; l is 0 or 1; u is 0 or an integer of 1 to 5; and t is 0 or an integer of 1 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.