Two-color heat-sensitive recording material

Abstract

Abstract PURPOSE:To enhance a color separating property, by successively laminating a high temp. color forming layer containing a leuco dye and a phenolic compound, an intermediate layer containing an aliphatic amine color erasing agent and a low temp. color forming layer containing the leuco dye and a thiourea derivative onto a support. CONSTITUTION:A high temp. color forming layer containing a leuco dye and a phenolic compound is formed onto a support and an intermediate layer containing thermoplastic aliphatic amine as a color erasing agent is provided thereon. Further, a low temp. color forming layer containing a thiourea derivative represented by formula (wherein R1 and R2 are hydrogen, halogen a trifluoromethyl group and an 1-4C alkyl group) is laminated onto the intermediate layer to form a two-color thermal recording material. As the aforementioned leuco dye, a leuco compound of a dye belonging to a trifluoromethane type, a fluorane type, a phenothiazine type, an auramine type and a spiropyran type is pref.

Inventors

• 👤 Kazumi Otaki
• 👤 一実 大滝
• 👤 Hiroshi Sakamoto
• 👤 洋 坂本

Bibliographic Details