NEW DEVELOPER COMPRESSING ORGANIC PHOSPHORUS DERIVATIVE, AND HEAT SENSITIVE RECORDING MATERIAL CONTAINING ORGANIC PHOSPHORUS DERIVATIVE

摘要

PROBLEM TO BE SOLVED: To provide a heat sensitive recording material which is excellent in stock stability of a color developed image and has sufficient color developed density, and a new color developing agent used therefor. ;SOLUTION: A heat-sensitive recording material comprises organic phosphorus derivative represented by the formula (1) [in the formula, R¹ and R² are, for example, an alkyl group, R³ is a hydrogen atom, Ar is a group selected from a group composed of an aromatic residue represented by the formula (2) (in the formula, R⁴, R⁵, R⁶ are, for example, an alkyl group.)].;COPYRIGHT: (C)1998,JPO