PHENOLSULFONIC ACID ARYL ESTER DEVELOPING AGENT AND HEAT SENSITIVE RECORDING MATERIAL

摘要

The present invention provides a compound represented by formula (1). The compound represented by formula (1) is a developing agent having both excellent color developing sensitivity at a low energy and excellent image stability [in the formula R represents a hydrogen atom an alkyl group an alkenyl group an aryl group or an aralkyl group; m R s independently represent an alkyl group an alkenyl group an aryl group an aralkyl group an alkoxy group a halogen atom a hydroxy group a cyano group a nitro group a carboxy group or an amino group; n R s independently represent an alkyl group an alkenyl group an aryl group an aralkyl group an alkoxy group a halogen atom a hydroxy group a cyano group a nitro group a carboxy group or an amino group; and m and n independently represent an integer of 0 to 4].