| 摘要 |
PURPOSE:To ensure the stability of an image by providing a thermal recording sheet having high sensitivity and excellent in heat resistance, water resistance and oil resistance by adding at least one kind of a dimerized thiourea compd. represented by a specific general formula to a thermal color forming layer as a stabilizer. CONSTITUTION:A thermal recording sheet is obtained by providing a thermal color forming layer containing a colorless or light colored basic leuco dye and an org. coupler on a support. In this case, at least one kind of a dimerized thiourea compd. represented by general formula (wherein R1-R8 are respectively independently a hydrogen atom, a lower alkyl group or a halogen atom, A is a substituted or non-substituted 1-18C alkyl group or an aryl group and X is S or SO2) is added to the thermal color forming layer as a stabilizer. As the stabilizer, there is 4,4'-(N,N''-diphenylcarbamoyl)aminodiphenyl sulfide or 4,4'-(N,N'-diphenylcarbamoyl)aminodiphenylsulfone. |
