| 摘要 |
PURPOSE:To obtain a heat reversible recording material having a wide temperature range capable of being brought to a transparent state and a large contrast by incorporating a matrix material composed of a styrene-butadiene copolymer and saturated carboxylic acid. CONSTITUTION:Carpric acid, lauric acid, myristic acid, etc., are proper as saturated carboxylic acid, and corresponds to 10-24C saturated carboxylic acid, and it is preferable that saturated carboxylic acid is kept within a range of (1:1)-(20:1) at a mixing ratio with a matrix material. When the coating fluid of a heat reversible recording material is adjusted for being applied to a substrate, etc., on usage, the matrix material and saturated carboxylic acid are dissolved into a solvent and the coating fluid may be acquired, and one kind selected from tetrahydrofuran, methyl ethyl ketone, methyl isobutyl ketone, etc., may be used or two kinds or more are mixed and may be employed as the solvent. Accordingly, the heat reversible recording material, a temperature range of which capable of being brought to a transparent state can be enlarged and a contrast of which can also be improved, is obtained. |
