| 摘要 |
PURPOSE:To obtain thermal recording paper excellent not only in color forming sensitivity but also in preservability such as humidity resistance, oil resistance and plasticizer resistance, by using a fluorance compound and a strong anion modified polyvinyl alcohol as the binder and/or dispersant of the fluorane compound. CONSTITUTION:A recording material is prepared by forming a thermal layer on a support sheet by applying a mixture of a color former and a coupler to said sheet. In the wt. ratio of the electron donating leuco dye, acidic substance and strong anion modified polyvinyl alcohol as a dispersant in a recording layer at the time of the preparation of a thermal recording layer, on the basis of the electron donating leuco dye represented by general formula, the quantity of the acidic substance is 1-10 times, pref., 1-3 times and the dispersant is 0.3-3 times. The thermal recording paper thus obtained is excellent in a thermal characteristic, heat resistance and water resistance and especially markedly excellent in color forming sensitivity. |
