| 摘要 |
PURPOSE:To obtain a thermal recording material having sufficient color density and good ink absorbability as well as having white ground and color-forming portion excellent in chemical resistance by including a specific compound as a precursor for colorless or light-color electron donative dye and an other specific compound as an electron acceptor substance to react with a precursor for an electrone donative dye for coloration in a thermal recording layer. CONSTITUTION:A precursor for a colorless or light-color electron donative dye, as represented by the general formula (I), where R1 and R2 are each a C1-C10 alkyl, R3 is aryl, and X is a C1-C10 alkyl or a halogen, is used solely or in combination with an intention of regulating color tones. As an electron acceptor compound as represented by the general formula (II), 1,4-bis(p- hydroxycumyl) benzene for example may be used. In preparing a coating liquid for thermal recording papers, base paper material is dispersed with a water-solu ble high polymer in water as a dispersion medium to obtain a dispersion. The dispersion is mixed with an oil-absorptive pigment a wax, a metallic soap, etc., as needed to form a coating liquid for thermal recording papers. The coating liquid is coated on a supporter (e.g., paper, plastics, etc.) to obtain a recording paper. |
