Heat-sensitive record material

Abstract

The heat-sensitive record material according to this invention has a heat-sensitive recording layer on a base sheet, which comprises a colorless or pale colored basic chromogenic material and a phenolic compound developing a color by contacting with the chromogenic material. The recording layer comprises, as the basic chromogenic material, at least one fluoran derivative represented by the following formula [I] and at least one phthalide derivative represented by the following formula [II] in a weight ratio of 100:1.about.20; ##STR1## wherein each R.sub.1, R.sub.2 represents alkyl, unsaturated alkyl, cycloalkyl, aryl, aralkyl or tetrahydrofurfuryl, each of which may have at least one substituent selected from the group consisting of halogen, alkyl and alkoxyl, R.sub.1 may cooperate with R.sub.2 to form a ring, each R.sub.3, R.sub.4 represents hydrogen, alkyl, halogen or alkoxyl, P represents hydrogen, halogen, alkyl, alkoxyl, halogenated alkyl, alkoxycarbonyl or dialkylamino, T represents hydrogen, alkyl or halogen, and n represents an integer of 1 to 4, ##STR2## wherein each R.sub.5 .about.R.sub.10 represents hydrogen, C.sub.1 .about.C.sub.6 alkyl, C.sub.3 .about.C.sub.6 unsaturated alkyl, C.sub.5 .about.C.sub.6 cycloalkyl, phenyl, C.sub.7 .about.C.sub.9 aralkyl or tetrahydrofurfuryl, each of which may have at least one substituent selected from the group consisting of halogen, C.sub.1 .about.C.sub.2 alkyl and C.sub.1 .about.C.sub.3 alkoxyl, each pair of R.sub.5 and R.sub.6, R.sub.7 and R.sub.8, and R.sub.9 and R.sub.10 may cooperate to form pyrrolidino ring, piperidino ring, morpholino ring or hexamethyleneimino ring, and Y represents halogen, C.sub.1 .about.C.sub.2 alkyl, C.sub.1 .about.C.sub.2 alkoxyl or C.sub.2 .about.C.sub.3 acyloxy.