| 摘要 |
PURPOSE:To ensure a favorable developed color density and make it possible to obtain a stable developed color image, by using a specified compound as an electron-acceptive compound in a recording material using an electron- donative colorless dye and the electron-acceptive compound. CONSTITUTION:A compound of the formula, wherein Ar represents an aryl substd. by an alkoxyl, and Y represents hydrogen, a halogen, alkyl or alkoxyl, is used as an electron-acceptive compound in a recording material using an electron-donative colorless dye and the electron-acceptive compound. The electron-acceptive compound may be, for example, beta-p-methoxyphenyldiethyl 4-hydroxybenzoate or beta-p-ethoxyphenoxyethyl 4-hydroxybenzoate. When the electron-acceptive compound is used for a thermal recording material, it preferably has a melting point of not lower than 60 deg.C. The electron-acceptive compound, when being combined with the electron-donative colorless dye, gives a developed color image with high density. Further, the developed color image thus formed has an extremely high stability. |
