Patent ID: 6720287
Filing Date: 2004-04-13
Classification: B41M

Abstract:
A heat-sensitive recording material comprising:a substrate; a thermal recording layer disposed on said substrate, which thermal recording layer contains a diazonium salt compound and a coupler that has a coupling reaction with the diazonium salt compound to develop a color; an aromatic carboxylate represented by the following general formula (I); and an aromatic carboxylate represented by the following general formula (II); wherein the diazonium salt compound is encapsulated in microcapsules together with the aromatic carboxylate represented by the general formula (I) and the aromatic carboxylate represented by the general formula (II); â€ƒin which R1 represents one of a halogen atom, an alkyl groups having 1 to 20 carbon atoms, an alkenyl groups having 2 to 20 carbon atoms, an aralkyl groups having 7 to 20 carbon atoms, an alkoxy groups having 1 to 20 carbon atoms, an alkylcarbonyl groups having 2 to 20 carbon atoms, an alkylcarbonyloxy groups having 2 to 20 carbon atoms, an alkyloxycarbonyl groups having 2 to 20 carbon atoms, a cycloalkyl groups having 5 to 20 carbon atoms and an aryl groups having 6 to 20 carbon atoms; each of R2, R3, R4, R5 and R6 independently represents one of a hydrogen atom, a halogen atom, an alkyl groups having 1 to 20 carbon atoms, an alkenyl groups having 2 to 20 carbon atoms, an aralkyl groups having 7 to 20 carbon atoms, an alkoxy groups having 1 to 20 carbon atoms, an alkylcarbonyl groups having 2 to 20 carbon atoms, an alkylcarbonyloxy groups having 2 to 20 carbon atoms, a cycloalkyl groups having 5 to 20 carbon atoms, and an aryl groups having 6 to 20 carbon atoms; and n represents an integer of 0 to 4; â€ƒin which R1 represents one of a halogen atom, an alkyl groups having 1 to 20 carbon atoms, an alkenyl groups having 2 to 20 carbon atoms, an aralkyl groups having 7 to 20 carbon atoms, an alkoxy groups having 1 to 20 carbon atoms, an alkylcarbonyl groups having 2 to 20 carbon atoms, an alkylcarbonyloxy groups having 2 to 20 carbon atoms, an alkyloxycarbonyl groups having 2 to 20 carbon atoms, a cycloalkyl groups having 5 to 20 carbon atoms and an aryl groups having 6 to 20 carbon atoms; each of R2, R3, R4, R5 and R6 independently represents one of a hydrogen atom, a halogen atom, an alkyl groups having 1 to 20 carbon atoms, an alkenyl groups having 2 to 20 carbon atoms, an aralkyl groups having 7 to 20 carbon atoms, an alkoxy groups having 1 to 20 carbon atoms, an alkylcarbonyl groups having 2 to 20 carbon atoms, an alkylcarbonyloxy groups having 2 to 20 carbon atoms, a cycloalkyl groups having 5 to 20 carbon atoms, and an aryl groups having 6 to 20 carbon atoms; and n represents an integer of 0 to 4.