| 摘要 |
PURPOSE:To improve heat resistance and coloring image stability by using as electron acceptance compound the alkylene-bis compound as bis-phenol compound. CONSTITUTION:The alkylene-bis compound of bis-phenol compound is represented by a formula, where R2 is 2-valency group, R1, R2, X1, X2 and X3 are one or more substitutes of halogen atom, hydroxy group, alkoxy group, thioether bond, alkoxy group, alkoxycarbonyl group, substituted amino group, acyloxy group, cyano group, nitro group, acyl group, carbamoyl group, sulfurmoyl group or substituents thereof, carbonyl group, carboxy group, nitro group, sulfo group, one or more substituents. When it is used for thermosensitive sheet, electron donative colorless dye and electron acceptance compound are pulverized and dispersed to particle size of 10mum or less. Dispersion medium uses aqueous soluble polymer solution having 0.25-10% concentration. The ratio of the used dye to the acceptance compound is preferably 1:10 to 1:0.1 by weight. |
