Thermal transfer recording medium
AssigneeKao Corporation
InventorsKouichi Sakai, Sadashi Ueda, Keizou Takahashi, Hiroshi Shibano
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Abstract
A thermal transfer recording medium comprising a support and a heat-fusible ink layer, coated on the support, which comprises a colorant and a binder. The binder comprises a polyurethane having bisphenol units or a polyether having bisphenol units and an hydroxyl group at the terminals. The thermal transfer recording medium provides a transferred image with a high quality regardless of the transferring paper.
Claims11
A thermal transfer recording medium, comprising a support and a heat-fusible ink layer, which is coated on said support, comprising a colorant and a binder, said binder comprising a polyurethane having bisphenol units and a glass transition temperature, determined by the differential thermobalance method, of 40 to 90 degree C. or a polyether having bisphenol units and a hydroxyl group at the terminals and a glass transition temperature, determined by the differential thermobalance method, of 40 to 90 degree C., wherein at least 30% by volume of said binder consists of said polyrethane or said polyether.
Dependencies are inferred from the claim text.