| 摘要 |
PURPOSE:To provide a thermal recording material having excellent light resistance, that is, showing extremely little image fading or ground decoloration when being exposed to fluorescent light or solar rays for a long time and having excellent moisture resistance and heat resistance, by incorporating a specified phenol antioxidant into a thermal color forming layer comprising a light-colored leuco dye and a color developer, and providing a UV-absorbing layer comprising a UV-absorbing benzotriazole compound on the color forming layer. CONSTITUTION:A phenol antioxidant of general formula (I), wherein each of R1, R2 and R3 is independently 1-5C alkyl, is incorporated in a thermal color forming layer, and a UV-absorbing layer comprising a UV-absorbing benzotriazole compound as a main constituent is provided on the color forming layer, in a thermal recording material which comprises a thermal color forming layer comprising a leuco dye and a color developer on a base. A particularly preferable leuco dye is a fluoran compound of general formula (II). The color developer is preferably a phenylthiourea compound of general formula (III). |
