Patent ID: 8058209

Claim:
A heat-sensitive recording material comprising: a substrate; a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developinglayer containing a leuco dye and a developer; a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment, wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and maleic acid copolymer resin, and wherein the maleic acid copolymer resin in the second protective layer is a water-soluble salt of a diisobutylene-maleic acid anhydride copolymer.