Fuji Photo Film Company, Limited

Kimiatsu Nomura

Tatsuo Kawabuchi

Hiroshi Sato

Hisato Nagase

Yoshihiro Jimbo

Tetsunori Matsushita

Naoto Yanagihara

Mitsuyuki Tsurumi

Yasuhiro Mitamura

Yohsuke Takeuchi

Ken Iwakura

Masanobu Takashima

Yoshimitsu Arai

Sadao Ishige

Shojiro Sano

Toshihide Aoshima

Akinori Fujita

Kimi Ikeda

Masatoshi Yumoto

Hisao Yamada

Tetunori Matushita

Tomohiro Kodama

Satoshi Higuchi

Kazunori Nigorikawa

Yoshihiro Jinbo

A diazonium salt represented by the following general formula (1) and a thermal recording material using the diazonium salt: General Formula (1) wherein Rand Reach independently represents an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group or a carbamoyl group, and Rand Rmay be linked each other to form a ring; and Rto Reach 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 R, R, Rand Rrepresents the diazonio group.

Diazonium salt and thermal recording material using the same

The present invention relates to a diazonium salt represented by the following general formula (1) and a synthesizing method thereof, as well as a recording material using the diazonium salt. In general formula (1), Rrepresents a hydrogen atom, an alkyl group or an aryl group. Rrepresents an alkyl group or an aryl group. Each of R, R, Rand Rindependently represents a hydrogen atom or a monovalent substituent. Here, at least one of R, R, Rand Rrepresents &#x2014;NX. Xrepresents an anion.

Diazonium salt, its synthesizing method and recording material

Diazonium salt and heat-sensitive recording material

An object of the present invention is to provide a pyrrolo&lsqb;1,2-a&rsqb;pyrimidine compound that is useful as a coupler providing excellent hue of a cyan system and sufficient density of formed color. The pyrrolo&lsqb;1,2-a&rsqb;pyrimidine compound of the present invention for achieving the object is represented by one of following general formulae (1), (2) and (3).

Pyrrolo&lsqb;1,2-a&rsqb;pyrimidine compound and heat-sensitive recording material using the same

A hydrazone dye is provided which forms cyan color having an excellent hue. The hydrazone dye is expressed by the following general formula (I):

Hydrazone dye

The present invention provides a photo-sensitive and heat-sensitive recording material comprising a substrate supporting thereon a photo-sensitive and heat-sensitive recording layer containing a diazo compound and a coupler, wherein the diazo compound is a compound represented by the following general formula (1) and the diazo compound is enclosed in a microcapsule:

Photo-sensitive and heat-sensitive recording material

A heat-sensitive recording material having formed on a support a heat-sensitive recording layer containing a diazonium salt and a coupling component, wherein the diazonium salt is a compound represented by the following formula (1): ##STR1## wherein R.sup.1 represents an alkyl group or an aryl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 each independently represents a hydrogen atom or an alkyl group, at least one of R.sup.2, R.sup.3, R.sup.4, and R.sup.5 represents an alkyl group, and R.sup.2 and R.sup.3, or R.sup.4 and R.sup.5, or R.sup.1 and R.sup.3, or R.sup.1 and R.sup.4, may combine with each other to form a ring; and X.sup.- represents an anion.

Heat-sensitive recording material

Disclosed is a heat-sensitive recording material comprising a substrate having thereon a heat-sensitive recording layer containing a diazonium salt compound and a coupler, pyrrolo�1,2-a! pyrimidine compound, as the coupler, being represented by the following general formula (1): ##STR1## wherein R.sup.1 to R.sup.4 each represents a hydrogen atom, a halogen atom, an aryl group, an alkyl group, a cyano group, an acyl group, a substituted carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyloxy group, an alkoxy group, an aryloxy group, an alkylthio group, or an arylthio group. The diazo-type heat-sensitive recording material, which develops a violet to cyan color, has excellent image stability and image fixing characteristics.

A heat-sensitive recording material having excellent light-fastness and raw stock storability is disclosed. The material includes a support and a heat-sensitive recording layer provided on the support, and the heat-sensitive recording layer contains a diazo compound and a coupler. The coupler contains at least one species of pyrazolone compounds represented by the following formula (1): ##STR1## wherein Ar represents a phenyl group, a naphthyl group, or an aromatic heterocyclic group, any one of which may have a substituent bonded to the nucleus, said substituent may be a halogen atom, a cyano group, a trifluoromethyl group, an alkyl group, an aryl group, an alkoxycarbonyl group, a carbamoyl group, or a sulfamoyl group; R.sup.1 and R.sup.2 independently represent an alkyl group, an alkenyl group, or an aryl group, or R.sup.1 and R.sup.2 may be linked to each other so as to form a heterocycle.

A diazo heat-sensitive recording material having excellent raw stock storability and image storage characteristics, which comprises a support having thereon a recording layer comprising a diazo compound, a coupling component and an organic base. The diazo compound is a 4-disubstituted amino-2-alkoxybenzenediazonium salt and the coupling component is a compound represented by the following general formula: ##STR1## wherein R.sub.4, R.sub.5, R.sub.6 and R.sub.7 each represents a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkyloxy group, an aryloxy group, an alkylthio group, an arylthio group, an acyl group, an alkoxycarbonyl group, an acyloxy group, a carbamoyl group, a sulfamoyl group, a halogen atom, a cyano group or a nitro group.

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Shizuoka-ken, Japan

Kimiatsu Nomura