| 摘要 |
PURPOSE:To obtain a recording superior in preservation characteristic and enhanced in color depth, by using a specific compound as a Cyan dye for sublimation transfer recording. CONSTITUTION:An anthraquinone dye for sublimation transfer recording is shown by a formula (I). In the formula, X represents -CSO- or -COS-, R represents lower alkyl, cycloalkyl, alkenyl, aryl, or aralkyl, which can be either straight-chain or branched. The dye shown by the formula (I) can be easily produced by using the following two methods before reduction: 1-amino-4- nitroanthraquinone-2-carboxylic acid as a material is caused to directly react with a mercaptan through an acid chloride, or alternatively to react with an alcohol, a phenol, etc., to be turned into an ester once, and then an oxygen atom in the ester is substituted with a sulfur atom by a hydrogen sulfide. A thermal transfer recording ink is produced using the dye by mixing the dye with appropriate resin, solvent, etc. As a heat transfer method, the obtained ink is applied to an appropriate base to produce a transfer sheet. |
