| 摘要 |
PURPOSE:To provide a thermographic sheet with an improved heat response by arranging an aromatic isocyanate compound and an imino compound as coupler and ester hydroxybenzoate with a specified melting point as sensitizer separately. CONSTITUTION:A color forming layer containing (1) an aromatic isocyanate compound (e.g. 2,5-demethoxybenzene-1,4-diisocyanate compound) and (2) an imino compound (e.g. 1,3-diimino-4,5,6,7-tetrachloroisoindoline) having one or more >C=NH groups forming a color in reaction with the (1) component as coupler (A) and ester hydroxybenzoate (e.g. p-benzyl hydroxybenzoate) with the melting point of 40-200 deg.C as sensitizer (B) separately is provided on a support to obtain an intended recording sheet. |
