NOVEL DEVELOPER OF ORGANIC PHOSPHORUS DERIVATIVE AND THERMAL RECORDING MATERIAL CONTAINING ORGANIC PHOSPHORUS DERIVATIVE

摘要

PROBLEM TO BE SOLVED: To provide excellent preservation stability of a color developed image and to incorporate sufficient color developing density by forming a developer for color developable dye of organic phosphorus derivative represented by a formula. ;SOLUTION: The developer for color developable dye such as leuco dye comprises organic phosphorus derivative represented by a formula I (where R¹, R² indicate group independently selected from a group consisting of alkyl group, alkoxy group and halogen, (m) and (n) indicate numbers independently selected from integers of 0 to 4, Ar indicates a group selected from a group consisting of aromatic residues represented by formulae II, III (where R³, R⁴, R⁵ indicate independently selected group from a group consisting of alkyl group, alkenyl group, cycloalkyl group, halogen, aralkyl group, hydroxy group, hydroxy group-containing alkyl group, alkoxy group, alkoxyalkyl group, carboxyalkoxy group, alkoxycarbonylalkoxy group, cycloalkoxycarbonylalkyl group, alkoxycarbonyl group, (p) in an integer of 0-3, (q) is an integer of 0-2, (r) is an integer of 0-4).;COPYRIGHT: (C)1998,JPO