A thermally sensitive recording medium

摘要

A thermally sensitive recording medium comprising, on a substrate, one or more layers including a thermally sensitive color developing layer which comprises a colorless or pale colored basic leuco dye and an organic color developer wherein at least one of said one or more layers comprises, as an ultraviolet ray absorbent, an aqueous emulsion type polymer which is an emulsion copolymer comprising (a) an ultraviolet ray absorbing monomer, (b) a vinyl compound monomer that can copolymerize with said monomer (a), (c) a hydrophilic monomer, and (d) a reactive emulsifier.