Thermosensitive coloring composition and reversible thermosensitive recording medium using same

摘要

A thermosensitive coloring composition is disclosed which includes a coloring agent and a color developer of the formula: <IMAGE> wherein R1 represents hydrogen, a halogen, a hydroxyl group, an alkyl group or an alkoxy group, R2 represents a C1-8 aliphatic hydrocarbon group, A represents a divalent aliphatic hydrocarbon group, B represents a substituted or non-substituted aromatic or aliphatic divalent group, Y and Z each represent a hetero atom-containing divalent group, n is an integer of 1-3 and p and q are each an integer of 0 or 1. A reversible thermosensitive recording medium includes a support and a thermosensitive layer of the above coloring composition formed thereon.