Heat-sensitive recording material
US4514745A · kind A · utility
3Cited by
2References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 30, 1984 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Jul 30, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/3335
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a heat-sensitive recording material incorporating a colorless or pale-colored basic dye and a color acceptor which is reactive with the dye to form a color when contacted therewith, the recording material characterized in that the color acceptor comprises at least one compound represented by the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each a hydrogen atom, alkyl having 1 to 8 carbon atoms, aryl or aralkyl, provided that R.sub.1 and R.sub.2, as well as R.sub.3 and R.sub.4, are not hydrogen at the same time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.