| 摘要 |
PURPOSE:To obtain a thermal recording body enhanced in water resistance, oil resistance, plasticizer resistance and alcohol resistance and improved in image stability, by using an aqueous ultraviolet or electron beam curable resin as a binder and/or a surface protective layer. CONSTITUTION:This thermal recording body contains an aqueous ultraviolet or electron beam curable resin used as a binder and/or a surface protective layer. As the aqueous ultraviolet or electron beam curable resin, a water-soluble or water-dispersible polymer containing a group active to ultraviolet rays or electron beam such as an acryloyl group, a maleimidyl group, a styryl group, a cynnamoyl group and an azido group etc. in the side chain thereof is designated. As the solvent or dispersing medium of said polymer, only, water is used in usual. When the aqueous resin is used as the binder, a color-forming substance such as a leuco compound and an acidic substance are separately mixed with the aqueous resin, that is, the binder to obtain the color forming substance and the acidic substance both of which were coated with the aqueous resin in a finely dispersed state and both coated substances are mixed to obtain a coating solution for a thermal color-forming layer. When the aqueous resin is used as the surface protective layer, said resin is applied to the thermal recording medium obtained by using the aqueous resin as the binder and irradiated with ultraviolet rays or electron beam before drying. |
