THERMAL RECORDING MEDIUM

摘要

A thermal recording medium comprising a support and a thermal recording layer formed thereon containing as the main components a colorless or light-colored basic leuco dye and a developer, wherein the thermal recording layer comprises an acrylic emulsion and colloidal silica and contains as the developer at least one diphenyl sulfone crosslinking-type compound represented by the general formula (A): (A) wherein X and Y are each independently a linear or branched hydrocarbon group which has 1 to 12 carbon atoms and may have an unsaturated bond or an ether linkage, or a group represented by the general formula (B) or (C): (B) (C) (wherein R is methylene or ethylene; and T is hydrogen or alkyl having 1 to 4 carbon atoms); R1 to R6 are each independently halogeno, alkyl having 1 to 6 carbon atoms, or alkenyl; m, n, p, q, r, and t are each an integer of 0 to 4, with the proviso that when m, n, p, q and/or t is 2 or above, the plural corresponding substituents may be different from each other; and a is an integer of 0 to 10.