NOVEL ZINC SALT OF PHTHALIMIDE DERIVATIVE

摘要

PROBLEM TO BE SOLVED: To provide a heat sensitive recording material having a storage stability of a developed color image. SOLUTION: The novel zinc salt of a phthalimide derivative represented by general formula (1) is employed, in which R represents an aralkyl group or an aryl group, X1 and X2 respectively represent a hydrogen atom, an alkyl group, an alkoxy group or a halogen atom.