| 摘要 |
PURPOSE:To provide a heat-sensitive recording body enhanced in stability of a colored image against a plasticizer, by incorporating a polyamine-sulfone into a heat-sensitive layer consisting of a color forming agent, an acidic substance and a binder. CONSTITUTION:A system (A) consisting of a colorless or light-colored color forming substance and a binder, etc. and a system (B) consisting of an acidic substance, 5-80wt% (based on the amount of the acidic substance) of a polyamine-sulfone containing repeating units of the formula (where each of R1, R2 is H, allyl, 1-16C alkyl or the like) as a binder, etc. are separately pulverized in an aqueous medium containing a binder and are mixed with each other to obtain a heat-sensitive coating material. In this case, the polyamine-sulfone may be incorporated in the system (A). The coating material thus obtained is applied on or made to impregnate a substrate and is dried. |
