| abstract |
A heat sensitive recording material comprising a substrate and a heat sensitive recording layer thereon incorporating a colorless or light-colored basic dye and a color acceptor reactive with the dye to form a color when contacted therewith, the recording material being characterized in that, as the color acceptor is used at least one compound of the formula [I]n wherein R is an alkylene group having at least one bond selected from the group consisting of ester bond and amido bond in the main chain, R 1 and R 2 are each hydrogen atom, alkyl, cycloalkyl, alkenyl, alkoxyl, hydroxyl or halogen atom. |