| 摘要 |
PURPOSE:To obtain a cyan color naphthoquinone dye for thermal transfer recording having a favorable hue in view of color reproduction without being pyrolyzed under the operating conditions of a thermal recording head and being resistant to light, moisture, chemicals or the like, by using a compound of a specified structural formula. CONSTITUTION:A compound of the formula, wherein each of R<1> and R<2> is alkyl, aralkyl, alkenyl, cyclohexyl, haloalkyl, alkoxyalkyl, alkoxyalkoxyalkyl, hydroxyalkyl, hydroxyalkoxyalkyl, hydroxyalkylthioalkyl, cyanoalkyl, tetrahydrofurfuryl, aralkyloxyalkyl, aryloxyalkyl, alkenyloxyalkyl, tetrahydrofurfuryloxyalkyl, alkoxycarbonylakyl, alkylcarbonyloxyalkyl or alkoxycarbonyloxyalkyl, with the proviso that both of R<1> and R<2> are not simultaneously 1-4C alkyl, is used. Accordingly, a stable and clear cyan color can be obtained. |
