Heat-sensitive recording material

Abstract

A heat-sensitive recording material formed of a support having disposed thereon a heat-sensitive color-forming layer that includes an electron-donating leuco-dye and an electron-receiving compound, with the heat-sensitive color-forming layer including, N-(4-hydroxyphenyl)-p-toluenesulfonamide as the electron-donating leuco-dye. The heat-sensitive color-forming layer may include 2-benzyloxynaphthalene or a combination of 2-benzyloxynaphthalene and methylolstearic acid amide as a sensitizer, calcite-type precipitated calcium carbonate light and/or aluminium hydroxide as an inorganic pigment, polyvinyl alcohol having a degree of saponification of 85 to 99 mol % and a degree of polymerization of from 200 to 2000 as an adhesive, and 1,1,3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane and/or 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane as an image stabilizer. When the layer includes 2-benzyloxynaphthalene and methylolstearic acid amide, a ratio (x/y) of 2-benzyloxynaphthalene (x) to methylolstearic acid amide (y) is preferably 95/5 to 40/60. The support can be essentially waste pulp. The heat-sensitive recording material of the present invention may additionally include a protective layer including an inorganic pigment and a water-soluble polymer.

Dependencies are inferred from the claim text.