Patent ID: 8415270
Filing Date: 2013-04-09
Classification: B41M

Abstract:
1. A heat-sensitive recording material, comprising: a support; a heat-sensitive recording layer comprising a leuco dye and a developer; and a protective layer comprising a pigment and a binder that comprises urethane ionomer, where the heat-sensitive recording layer is located between the protective layer and the support, where the pigment comprises secondary articles with an average particle diameter of 30 to 900 nm formed by aggregation of amorphous silica primary particles with a particle diameter of 3 to 70 nm, and the secondary particles are present in a proportion of about 5 to 35 mass % relative to total solids of the protective layer and the colloidal silica is present in a proportion of about 1 to 25 mass % relative to total solids of the protective layer.