Hydroxydiphenyl sulfone derivative and heat-sensitive recording material using the derivative
US4612557A · kind A · utility
3Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1985 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Nov 22, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C317/00
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A hydroxydiphenyl sulfone derivative represented by the formula (I) is a novel compound and a heat-sensitive recording material which comprises at least one of the derivatives as a color acceptor not only has an excellent recording sensitivity, resistances to plasticizer and diazo developer but also suits to high-speed recording, has an excellent storage stability of record images and does not decrease in whiteness of the background, ##STR1## wherein R.sup.1 and R.sup.2 are each hydrogen, halogen, lower alkyl, lower alkoxyl or hydroxyl and n is an integer of 3 or 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.