Heat-sensitive recording materials

Claim 1

A heat-sensitive recording material, comprising: a support; a heat-sensitive recording layer positioned on the support, wherein the heat-sensitive recording layer comprises a colorless or pale-colored basic dye and a color developing material that, when heated, reacts with the basic dye to form a color, the color developing material being comprised of a compound having the general formula (I): ##STR6## wherein R 1 , R 2 and R 3 independently represent hydrogen or a hydroxyl group; and a heat-fusible material selected from the group consisting of: (a) a compound having the general formula (II): ##STR7## wherein the substituents are positioned at the ortho- or para- position; and R 4 and R 5 independently represent an alkyl group having 1 to 6 carbon atoms, a phenyl group or a cyclohexyl group; (b) a compound having the general formula (III): ##STR8## wherein R 6 and R 7 independently represent hydrogen or an alkyl group having 1 to 8 carbon atoms; and X represents hydrogen or a halogen atom; and (c) a compound having the general formula (IV): ##STR9## wherein R 8 represents an alkyl group having 1 to 12 carbon atoms or a benzyl group.