| 摘要 |
PURPOSE:To obtain the titled recording material excellent in developed color density and color forming sensitivity and suitable for high speed recording, in a thermal recording material utilizing color forming reaction of a leuco dye and a developer, by together using a compound represented by a specific formula as an auxiliary component. CONSTITUTION:A compound represented by general formula [I] (wherein R1 and R2 are respectively independently a 1-18C alkyl group, a cycloalkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group) together used as an auxiliary component has high capacity dissolving a phenolic compound being a developer (electron acceptive compound) used in a wide range and a leuco dye (electron donating leuco dye) at the time of heating and, by regulating the m.p. of the compound represented by the general formula [I] used together, a thermal recording layer having arbitrary sensitivity can be obtained. The compound to be used represented by the general formula [I] pref. has m.p. of 40-150 deg.C and especially pref. has m.p. of 50-120 deg.C from the aspect of storage stability and sensitivity as the thermal recording material. |
