Patent ID: 6348433
Filing Date: 2002-02-19
Classification: B41M,G03C

Abstract:
A heat-sensitive recording material, comprising:a substrate; and a heat-sensitive recording layer provided on said substrate; said heat-sensitive recording layer including at least:a diazo compound; and a coupler to react with said diazo compound to color said diazo compound, said diazo compound being at least one compound of the compounds represented by the following general formulae (I)-(III): wherein, in general formula (I), each of R1, R2, R3 and R4 independently represents a group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an aryl group, â€”OR10, â€”SR10, â€”COOR10, â€”CONR10R11, â€”SO2R10, â€”SO2NR10R11, â€”COR10, a nitro group and a cyano group; each of R5, R6, R7, R8 and R9 independently represents a group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, an aryl group, â€”OR12, â€”COOR12, â€”CONR12R13, â€”SO2R12, â€”SO2NR12R13, â€”COR12, a nitro group and a cyano group; each of R10, R11, R12 and R13 independently represents a group selected from the group consisting of a hydrogen atom, an alkyl group and an aryl group; further wherein, at least one of the R1, R2, R3 and R4 represents a group selected from the group consisting of â€”COOR10, â€”CONR10R11, â€”SO2R10, â€”SO2NR10R11, a nitro group and a cyano group; and at least one of the R5, R6, R7, R8 and R9 represents a group selected from the group consisting of â€”COOR12, â€”CONR12R13, â€”SO2R12, â€”SO2NR12R13, a nitro group and a cyano group; wherein, in general formula (II), each of R21, R22, R23 and R24 independently represents a group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, â€”OR30, â€”COOR30, â€”SO2R30, a nitro group, a cyano group and â€”CONR30R31; each of R25, R26, R27, R28 and R29 independently represents a group selected from the group consisting of a hydrogen atom, a halogen atom, â€”OR32, â€”COOR32, â€”CONR32R33, â€”SO2NR32R33, a nitro group and a cyano group; each of R30, R31, R32, and R33 independently represents a group selected from the group consisting of a hydrogen atom, an alkyl group and an aryl group; further wherein, at least one of the R21, R22, R23 and R24 represents a group selected from the group consisting of â€”CONR30R31, â€”COOR30, â€”SO2R30, a nitro group and a cyano group; and at least one of the R25, R26, R27, R28, and R29 represents a group selected from the group consisting of â€”COOR32, â€”CONR32R33, â€”SO2NR32R33, a nitro group and a cyano group; and wherein, in general formula (III), each of R21, R22, R23 and R24 independently represents a group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, â€”OR30, â€”COOR30, â€”SO2R30, a nitro group, a cyano group and â€”CONR30R31 each of R30 and R31 independently represents a group selected from the group consisting of a hydrogen atom, an alkyl group and an aryl group; further wherein, at least one of R21, R22, R23 and R24 represents a group selected from the group consisting of â€”CONR30R31, â€”COOR30, â€”SO2R30, a nitro group and a cyano group, and R34 represents a group selected from the group consisting of the following monovalent groups wherein each of R35 and R36 independently represents a group selected from the group consisting of an alkyl group and an aryl group.