Abstract: A recording material having, on a support, a recording layer containing an azolinyl acetic acid derivative and a diazo compound. The azolinyl acetic acid derivative is preferably is a compound represented by the following general formula (1): wherein X represents an oxygen atom or a sulfur atom; R11 represents an alkyl group, an aryl group, a heterocyclic group, —OR13 or —NR14R15; R12 represents a substituent; R13 represents an alkyl group, an aryl group or a heterocyclic group; R14 and R15 each independently represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; n represents an integer from 0 to 4; and, when n is an integer of 2 or greater, two or more R12s may be linked with each other to form a ring.

Abstract: An azo compound or a tautomer thereof, wherein the azo compound is represented by the following Formula (1). In Formula (1), R1 represents a hydrogen atom, alkyl group, aryl group, acyl group, carbamoyl group, alkylsulfonyl group, arylsulfonyl group, or heterocyclic group; R2 represents —NR5R6 or —OR7; R5 and R6 each independently represent a hydrogen atom, alkyl group, aryl group, acyl group, carbamoyl group, alkylsulfonyl group, or arylsulfonyl group; R7 represents an alkyl group or aryl group; R3 represents a hydrogen atom, alkyl group, aryl group, alkoxy group, aryloxy group, acylamino group, carbamoylamino group, alkylsulfonylamino group, or arylsulfonylamino group; n is an integer of 3 to 5; and each R4, of which there are n in number, independently represents an alkyl group, aryl group, alkoxy group, aryloxy group, amino group, alkylthio group, arylthio group, acylamino group, alkylsulfonylamino group, or arylsulfonylamino group, and one R4 may bind to another R4 forming a ring.

Abstract: A diazonium salt represented by the following general formula (1) and a thermal recording material using the diazonium salt: General Formula (1) wherein R1 and R2 each independently represents an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group or a carbamoyl group, and R1 and R2 may be linked each other to form a ring; and R3 to R6 each independently represents a hydrogen atom, a hydroxyl group, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkylthio group, an arylthio group, an alkylsulfonyl group, an arylsulfonyl group or a diazonio group, and at least one of R3, R4, R5 and R6 represents the diazonio group.

Abstract: An azo compound or a tautomer thereof, wherein the azo compound is represented by the following Formula (1). In Formula (1), R1 represents a hydrogen atom, alkyl group, aryl group, acyl group, carbamoyl group, alkylsulfonyl group, arylsulfonyl group, or heterocyclic group; R2 represents —NR5R6 or —OR7; R5 and R6 each independently represent a hydrogen atom, alkyl group, aryl group, acyl group, carbamoyl group, alkylsulfonyl group, or arylsulfonyl group; R7 represents an alkyl group or aryl group; R3 represents a hydrogen atom, alkyl group, aryl group, alkoxy group, aryloxy group, acylamino group, carbamoylamino group, alkylsulfonylamino group, or arylsulfonylamino group; n is an integer of 3 to 5; and each R4, of which there are n in number, independently represents an alkyl group, aryl group, alkoxy group, aryloxy group, amino group, alkylthio group, arylthio group, acylamino group, alkylsulfonylamino group, or arylsulfonylamino group, and one R4 may bind to another R4 forming a ring.

Abstract: A heat-sensitive recording material including a substrate having disposed thereon a heat-sensitive recording layer containing a diazo compound and a coupler compound capable of reacting with the diazo compound to develop color, wherein the coupler compound includes at least one of anilide derivatives represented by the following formula (1) or tautomers thereof: wherein R1 represents an alkyl group or an aryl group; R2, R3 and R4 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an acyl group, an alkoxy group, an alkoxycarbonyl group, a hydroxycarbonyl group, an aminocarbonyl group, an acylamino group, a cyano group, a nitro group, an arylthio group or an alkylthio group; L represents a group which can leave upon coupling with the diazo compound; m represents 1 or 2; and n represents 1 or 2.

Abstract: A high-molecular weight gel having a leuco dye represented by the formula (L-1) as defined herein, connected thereto by covalent bond or single bond, and a high-molecular weight gel represented by the formula (R-1) as defined herein.

Abstract: The present invention provides a recording material including a support having disposed thereon a recording layer that contains a diazo compound and a compound represented by formula (1): 1

Abstract: A recording material having, on a support, a recording layer containing an azolinyl acetic acid derivative and a diazo compound.

Abstract: A heat-sensitive recording material including a substrate having disposed thereon a heat-sensitive recording layer containing a diazo compound and a coupler compound capable of reacting with the diazo compound to develop color,

Abstract: Phenylurethane compounds of the following general formula (1); asymmetric urea compounds of the following general formula (10) obtained from the phenylurethane compounds; barbituric acid derivatives of general formula (18) produced from the asymmetric urea compounds, which have specific substituents and are useful in diazo thermal recording materials; and diazo thermal recording materials containing the barbituric acid derivative.

Abstract: A diazonium salt represented by the following general formula (1) and a thermal recording material using the diazonium salt: 1

Abstract: A process for an azo coupling reaction is provided that has a large coupling reaction rate and an excellent coloring density and exerts high coupling activity using a stable coupler, and a recording material containing the coupler is provided. The process for an azo coupling reaction comprises carrying out a coupling reaction of a diazonium salt and a coupler to make the diazonium salt form color, and the coupler has certain specified structures.

Abstract: A high-molecular weight gel having a leuco dye represented by the formula (L-1) as defined herein, connected thereto by covalent bond or single bond, and a high-molecular weight gel represented by the formula (R-1) as defined herein.

Abstract: Phenylurethane compounds of the following general formula (1); asymmetric urea compounds of the following general formula (10) obtained from the phenylurethane compounds; barbituric acid derivatives of general formula (18) produced from the asymmetric urea compounds, which have specific substituents and are useful in diazo thermal recording materials; and diazo thermal recording materials containing the barbituric acid derivative.

Abstract: Phenylurethane compounds of the following general formula (1); asymmetric urea compounds of the following general formula (10) obtained from the phenylurethane compounds; barbituric acid derivatives of general formula (18) produced from the asymmetric urea compounds, which have specific substituents and are useful in diazo thermal recording materials; and diazo thermal recording materials containing the barbituric acid derivative.

Abstract: A process for an azo coupling reaction is provided that has a large coupling reaction rate and an excellent coloring density and exerts high coupling activity using a stable coupler, and a recording material containing the coupler is provided. The process for an azo coupling reaction comprises carrying out a coupling reaction of a diazonium salt and a coupler to make the diazonium salt form color, and the coupler has certain specified structures.