SENSITIZER FINE PARTICLE DISPERSION FOR THERMAL RECORDING BODY CONTAINING STEARIC ACID AMIDE AS MAIN COMPONENT, METHOD FOR PRODUCING THE SAME, MIXED DISPERSION COMPOSITION FOR THERMAL RECORDING LAYER, AND THERMAL RECORDING BODY

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a sensitizer fine particle dispersion which can be performed safely under an atmospheric pressure even when stearic acid amide is used as a sensitizer, and does not accompany a legal obligation of maintenance; a sensitizer fine particle dispersion obtained by the production method; a mixed dispersion composition for a thermal recording layer using the sensitizer fine particle dispersion; and a thermal recording body using the mixed dispersion composition.SOLUTION: Provided is a method for producing a sensitizer fine particle dispersion for a thermal recording body comprising the steps of: mixing stearic acid amide and a sensitizer other than the stearic acid amide in a mass part ratio of 95:5 to 51:49; heating and melting the obtained mixture in emulsifier-dispersed water to integrate and atomize by emulsification the stearic acid amide and the sensitizer, or heating and melting the mixture to atomize by emulsification a melted mixture, in which the stearic acid amide and the sensitizer are integrated, in the emulsifier-dispersed water; and crystallizing sensitizer particles from the emulsified fine particles by quick chilling of the obtained emulsified dispersion.