Thermally reversible color forming composition and thermally reversible recording medium using the thermally reversible color forming composition
US5868821A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 30, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jan 30, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41M5/305
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A thermally reversible color forming composition which includes an electron-donating chromophoric compound and an electron-accepting compound, by which formation and deletion of a color image may be carried out by adjusting thermal energy applied to the composition, wherein the electron-accepting compound is a carboxylic acid compound having the following general formula (1): EQU R.sub.1 --X--R.sub.2 --COOH (1) in which, X represents a divalent group having at least one hetero atom, R.sub.1 represents a hydrocarbon group having at least one hetero atom, R.sub.2 represents an aliphatic hydrocarbon group, which may be substituted and whose principle chain contains less than 6 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.