| 摘要 |
PURPOSE:To obtain dyestuffs and an ink composition for thermal transfer recording having high sublimating speed and excellent image stability after transfer by using dyestuffs being shown in specific chemical formula and having superior solubility to an ink solvent and the low melting point as the sublimating dyestuffs for thermal transfer recording. CONSTITUTION:In a thermal transfer recording system using sublimating dyestuffs, a transfer sheet, in which condenser paper, a PET film, etc., are coated with sublimating dyestuffs changed into ink, is employed, and the transfer sheet is heated selectively by a thermal head, thus conducting transfer to recording paper. Dyestuffs shown in general formula mentioned on the right are used as the sublimating dyestuffs at that time. In formula, R<1> represents an alkyl sulfonyl group, an alkylamino carbonyl group, etc., R<2>-R<4> a hydrogen atom, 1-4C alkyl groups, etc., R<5>, R<6> the hydrogen atom, the 1-4C alkyl groups, etc., and R<7>, <8> the hydrogen atom, a substituted or non-substituted alkyl group, etc. The dyestuffs are kneaded with a binder resin, an organic solvent, etc., thus acquiring an ink composition for thermal transfer recording. |
