JP4587945B2 - Thermal transfer image-receiving sheet and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thermosensitive transfer image receiving sheet, which has high transfer density and is excellent in image stability such as image fastness, light-resistance, resistance to ozone or the like. <P>SOLUTION: This thermosensitive transfer image receiving sheet has an accepting layer, which is set to contain (i) at least one kind of dyeing and coloring accepting polymers selected from the group consisting of a polymer having a vinyl chloride skeleton and a polymer having a polyester skeleton and (ii) at least one kind of image receiving function improvers. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a heat-sensitive transfer image-receiving sheet that is used by being superimposed on a heat-sensitive transfer sheet (ink sheet) containing a dye, and particularly relates to a heat-sensitive transfer image-receiving sheet having a high transfer density and excellent image stability and a method for producing the same.

  Conventionally, various thermal transfer recording methods are known, and among them, the dye diffusion transfer recording method is attracting attention as a process capable of producing a color hard copy closest to the image quality of a silver salt photograph (for example, Non-Patent Document 1 and 2). In addition, it has the advantages of being dry, being able to visualize directly from digital data, and being easy to duplicate, compared to silver salt photography.

  In this dye diffusion transfer recording system, a thermal transfer sheet containing a pigment (hereinafter also referred to as an ink sheet) and a thermal transfer image receiving sheet (hereinafter also referred to as an image receiving sheet) are superposed, and then heat is generated by an electrical signal. By heating the ink sheet with a controlled thermal head, the dye in the ink sheet is transferred to the image receiving sheet to record image information. By recording three colors of cyan, magenta, and yellow in an overlapping manner, A color image having a continuous change in color shading can be transferred and recorded.

  The conventional heat-sensitive transfer image-receiving sheet has poor light resistance of the transferred image, and the clarity of the transferred image is lowered during storage, so that a beautiful image cannot be maintained for a long time. This is because a relatively large amount of the transferred dye is present in the vicinity of the surface of the receiving layer and thus is susceptible to light. In order to solve such a problem, for example, in Patent Document 1 or 2, a release agent layer containing a stabilizer such as an ultraviolet absorber or an antioxidant is formed on the surface of the dye receiving layer of the image receiving sheet. Etc. are disclosed. However, when the UV absorber is simply added to the dye-receiving layer, the stabilizer disappears by bleeding out, transferred to the ink sheet during dye transfer, or volatilized or decomposed by heat. The effect of the agent decreases with time. Further, Patent Document 3 discloses additives for silver halide color photographic light-sensitive materials, but there is no disclosure of heat-sensitive recording materials.

In conventional heat-sensitive transfer image-receiving sheets, a polyester resin with good dyeability is used for the dye-receiving layer. However, so-called fusion occurs in which the ink sheet sticks to the image-receiving sheet during heat transfer by a thermal head, or the ink sheet becomes the image-receiving sheet. When peeling off the ink sheet due to sticking, problems such as streaking on the surface of the image receiving sheet (sticking) occur, and color blurring of the image may occur if stored under high temperature and humidity conditions. It was. In order to solve such a problem, for example, Patent Document 4 or 5 uses a dyeing resin comprising a certain ratio of a polyester resin and a vinyl chloride-vinyl acetate copolymer, or a vinyl chloride styrene copolymer. It is disclosed. However, the image-receiving sheet disclosed in Patent Document 4 or 5 has not been able to solve the above light fastness problem.
JP-A-2-141287 Japanese Patent No. 3325613 JP 2004-361936 A JP-A-6-166272 Japanese Patent Laid-Open No. 7-40670 “New development of information recording (hard copy) and its materials”, published by Toray Research Center, Inc., 1993, p. 241-285 “Development of printer materials”, issued by CMC Co., Ltd., 1995, p. 180

  It is an object of the present invention to provide a heat-sensitive transfer image-receiving sheet having a high transfer density and excellent image stability such as image fastness, light resistance and ozone resistance.

The above problems have been achieved by the following means.
(1) A heat-sensitive transfer image-receiving sheet having a receiving layer, wherein (i) at least one dyeable receiving polymer selected from a polymer having a vinyl chloride skeleton and a polymer having a polyester skeleton in the receiving layer; and (ii) Contains at least one image receiving function improver which is a compound represented by any one of the following general formulas (Ph-1) ′, (TS-ID) , ( TS-IIIB), or (TS-IIIC) A heat-sensitive transfer image-receiving sheet.

［一般式（Ｐｈ−１）’中、Ｒ_ｂ1はメチル基を表し、Ｒ_ｂ６は脂肪族基を表す。
一般式（ＴＳ−ＩＤ）中、Ｒ_５１は脂肪族基を表す。Ｒ _５２、Ｒ_５３、Ｒ_５５およびＲ_５６は各々独立に、水素原子または置換基を表す。Ｒ_５７はＲ_５１と同義である。但し、化合物の総炭素数は１０以上である。
一般式（ＴＳ−IIIＢ）中、Ｒ _６５ は水素原子を表し、Ｒ _ｃ３ はアリール基を表す。Ｘ _６３ は−Ｎ−Ｎ−とともにピラゾリジン環を形成するに必要な非金属原子群を表す。
一般式（ＴＳ−IIIＣ）中、Ｒ _６５ ’およびＲ _６６ は各々独立に脂肪族基を表し、Ｒ _ｃ３ ’は脂肪族基を表す。］
（２）受容層を有する感熱転写受像シートであって、前記受容層に（ｉ）塩化ビニル骨格を有するポリマーおよびポリエステル骨格を有するポリマーから選ばれる少なくとも１種の染色性受容ポリマー、ならびに（ｉｉ）下記一般式（ＴＳ−ＩＤ）、（ＴＳ−IIIＢ）、または（ＴＳ−IIIＣ）のいずれかで表される化合物である画像受像機能向上剤の少なくとも１種を含有することを特徴とする感熱転写受像シート。

[In General Formula (Ph-1) ′, R _b1 represents a methyl group, and R _b6 represents an aliphatic group .
In the general formula (TS-ID), R ₅₁ represents an aliphatic group . R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ each independently represent a hydrogen atom or a substituent. R ₅₇ has the same meaning as R ₅₁ . However, the total carbon number of the compound is 10 or more.
In General Formula (TS-III B ) , R ₆₅ represents a hydrogen atom, and R _c3 represents an aryl group. X ₆₃ represents a nonmetallic atom group necessary for forming a pyrazolidine ring together with —N—N—.
In general formula (TS-IIIC), R ₆₅ ′ and R ₆₆ each independently represent an aliphatic group, and R _c3 ′ represents an aliphatic group. ]
(2) a heat-sensitive transfer image-receiving sheet having a receiving layer, wherein (i) at least one dyeable receiving polymer selected from a polymer having a vinyl chloride skeleton and a polymer having a polyester skeleton in the receiving layer; and (ii) Thermal transfer characterized in that it contains at least one image receiving function improver that is a compound represented by any one of the following general formulas (TS-ID) , ( TS-IIIB), or (TS-IIIC). Image receiving sheet.

［一般式（ＴＳ−ＩＤ）中、Ｒ_５１は脂肪族基を表す。Ｒ _５２、Ｒ_５３、Ｒ_５５およびＲ_５６は各々独立に、水素原子または置換基を表す。Ｒ_５７はＲ_５１と同義である。但し、化合物の総炭素数は１０以上である。
一般式（ＴＳ−IIIＢ）中、Ｒ _６５ は水素原子を表し、Ｒ _ｃ３ はアリール基を表す。Ｘ _６３ は−Ｎ−Ｎ−とともにピラゾリジン環を形成するに必要な非金属原子群を表す。
一般式（ＴＳ−IIIＣ）中、Ｒ _６５ ’およびＲ _６６ は各々独立に脂肪族基を表し、Ｒ _ｃ３ ’は脂肪族基を表す。］

[In the general formula (TS-ID), R ₅₁ represents an aliphatic group . R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ each independently represent a hydrogen atom or a substituent. R ₅₇ has the same meaning as R ₅₁ . However, the total carbon number of the compound is 10 or more.
In General Formula (TS-III B ) , R ₆₅ represents a hydrogen atom, and R _c3 represents an aryl group. X ₆₃ represents a nonmetallic atom group necessary for forming a pyrazolidine ring together with —N—N—.
In general formula (TS-IIIC), R ₆₅ ′ and R ₆₆ each independently represent an aliphatic group, and R _c3 ′ represents an aliphatic group. ]

(3) The thermal transfer image-receiving sheet as described in the item (2), wherein the image-receiving function improver is a compound represented by the general formula (TS-ID).
(4) The heat-sensitive transfer image-receiving sheet according to item (2), wherein the image-receiving function improver is a compound represented by the general formula ( TS-IIIB) or (TS-IIIC ) .
(5) The heat-sensitive transfer image-receiving sheet as described in item (2), wherein the image-receiving function improver is a compound represented by the general formula (TS-IIIB).
(6) A thermal transfer image receiving image, wherein the dyeable receiving polymer according to any one of items (1) to (5) and the image receiving function improving agent are mixed at least to form a receiving layer. Sheet manufacturing method.

  The heat-sensitive transfer image-receiving sheet of the present invention can form high-quality images and has high image fastness, light resistance and ozone resistance, and can exhibit excellent image stability.

Hereinafter, the present invention will be described in detail.
The heat-sensitive transfer image-receiving sheet of the present invention has a receiving layer and contains a dyeable receiving polymer and an image-receiving function improving agent in the receiving layer (in the present invention, the “agent” is an “agent consisting of a single compound” In addition to “,” it is used to mean “agent” as a mixture or composition of a plurality of compounds, and it may be solid or liquid.) The receiving layer is usually provided on a support, and a base layer is preferably formed between them. For example, a white background adjusting layer, a charge adjusting layer, an adhesive layer, and a primer layer are formed. Moreover, it is preferable that the heat insulation layer is formed between the base layer and the support body. Furthermore, a curl adjusting layer, a writing layer, and a charge adjusting layer are preferably formed on the back side of the support. Each layer is applied by a general method such as roll coating, bar coating, gravure coating, or gravure reverse coating.

(Receptive layer)
<Dye-receiving polymer>
In the heat-sensitive transfer image-receiving sheet of the present invention, the receiving layer serves to receive the dye transferred from the ink sheet and maintain the formed image. For the receiving layer, a resin (dyeable receiving polymer) that is easily dyed is used, and a polymer having a vinyl chloride skeleton or a polymer having a polyester skeleton is used as the dyeable receiving polymer. For example, polyolefin resins such as polyethylene and polypropylene, halogenated resins such as polyvinyl chloride and polyvinylidene chloride, vinyl resins such as polyvinyl acetate and polyacrylate, and copolymers thereof, polyethylene terephthalate, polybutylene terephthalate, etc. Polyester resins, polystyrene resins, polyvinyl alcohol, copolymers of olefins such as ethylene and propylene and other vinyl monomers, vinyl chloride vinyl acetate copolymers, styrene acrylic copolymers, etc. Can be mentioned. Among these, polyvinyl chloride, vinyl chloride vinyl acetate copolymer, and polyester resin are preferable.
The heat-sensitive transfer image-receiving sheet of the present invention that the content of the receiving layer of the dye soluble receptor polymer is preferably 1.0~7.0g / ^{m 2,} a 2.5~5.5g / ^{m 2} (The content or coating amount of each component in the present invention is a numerical value in terms of a solid component at the time of drying unless otherwise specified, and “g / m ² ” is per unit area of the thermal transfer image-receiving sheet. Represents mass).
The molecular weight of the dyeable accepting polymer is not particularly limited, but is preferably 10,000 to 100,000, more preferably 20,000 to 50,000 in terms of number average molecular weight.

  The degree of dyeing property is defined as follows. Output four colors of yellow, magenta, cyan, and black to the image receiving sheet so as to form a solid image of 256 gradations, and measure the reflection density of the obtained image. Define a good receptive polymer. Note that the dyeing property of the receiving polymer may differ depending on the printer and the ink sheet.

<Image receiving function improver>
In the heat-sensitive transfer image-receiving sheet of the present invention, the receptor layer is represented by any one of the aforementioned general formula (Ph-1) ′, (TS-ID) , ( TS-IIIB), or (TS-IIIC). At least one image receiving function improver (hereinafter referred to as an image receiving function improving agent of the present invention) is included.
The image receiving function improver containing the compound of the present invention will be described in detail below.

[High boiling point solvent]
In the heat-sensitive transfer image-receiving sheet of the present invention, a high boiling point solvent can be used as an image-receiving function improver. As the high boiling point solvent, a high boiling point organic solvent is preferable, and phthalic acid ester compounds (dibutyl phthalate, dioctyl phthalate, di-2-ethylhexyl phthalate, etc.), phosphoric acid or phosphonic acid ester compounds (triphenyl phosphate, phosphorus Tricresyl acid, tri-2-ethylhexyl phosphate, etc.), fatty acid ester compounds (di-2-ethylhexyl succinate, tributyl citrate, etc.), benzoic acid ester compounds (2-ethylhexyl benzoate, dodecyl benzoate, etc.), amide compounds (N, N-diethyldodecanamide, N, N-dimethyloleamide, etc.), alcohol or phenol compound (isostearyl alcohol, 2,4-di-tert-amylphenol, etc.), aniline compound (N, N-dibutyl- 2-Butoxy-5-tert-octyl Nilin, etc.), chlorinated paraffin compounds, hydrocarbon compounds (dodecylbenzene, diisopropylnaphthalene, etc.), carboxylic acid compounds (2- (2,4-di-tert-amylphenoxy), butyric acid, etc.). An organic solvent having a boiling point of 30 ° C. or higher and 160 ° C. or lower (such as ethyl acetate, butyl acetate, methyl ethyl ketone, cyclohexanone, methyl cellosolve acetate, dimethylformamide) may be used in combination.
The content of the high boiling point solvent in the receiving layer is preferably 1 to 20 parts by mass and more preferably 2 to 10 parts by mass with respect to 100 parts by mass of the dyeable receiving polymer.

[Compound represented by formula (Ph)]
In the heat-sensitive transfer image-receiving sheet of the present invention, a compound represented by the following general formula (Ph) can be used as an image-receiving function improver.

In the general formula (Ph), R _b1 represents an aliphatic group, an aryl group, a carbamoyl group, an acylamino group, a carbonyl group, or a sulfonyl group, and R _{b2 to} R _b5 each independently represent a hydrogen atom, a halogen atom, or a hydroxy group. , Aliphatic group, aryl group, heterocyclic group, alkyloxy group, aryloxy group, heterocyclic oxy group, oxycarbonyl group, acyl group, acyloxy group, oxycarbonyloxy group, carbamoyl group, acylamino group, sulfonyl group, sulfinyl Represents a group, a sulfamoyl group, an alkylthio group, or an arylthio group.

The compound represented by general formula (Ph) is demonstrated in detail below.
R _b1 represents an aliphatic group, an aryl group, a carbamoyl group, an acylamino group, a carbonyl group, or a sulfonyl group. In addition, these substituents can be further substituted with other substituents. Examples of the aliphatic group include a methyl group, an ethyl group, an i-propyl group, a t-butyl group, a t-octyl group, and a cyclohexyl group. Examples of the aryl group include a phenyl group and a naphthyl group. Examples of the carbamoyl group include an N, N-diethylcarbamoyl group, an N, N-dibutylcarbamoyl group, a hexylcarbamoyl group, and an N, N-diphenylcarbamoyl group. Examples of the acylamino group include a butylamide group, a hexylamide group, an octylamide group, and a benzamide. Examples of the carbonyl group include a hexyloxycarbonyl group, an octyloxycarbonyl group, and a dodecyloxycarbonyl group. Examples of the sulfonyl group include a butylsulfonyl group, an octylsulfonyl group, and a dodecylsulfonyl group.

R _{b2 to} R _b5 are each independently a hydrogen atom, a halogen atom (eg, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, etc.), a hydroxy group, an alkyl group (eg, methyl, ethyl, butyl, allyl, etc.), an aryl group (Eg phenyl, naphthyl etc.), heterocyclic group (eg piperidyl group, pyrrolyl group, indolyl group etc.), aliphatic oxy group (eg methoxy, octyloxy, cyclohexyloxy etc.), aryloxy group (eg phenoxy, naphthoxy etc.) , Heterocyclic oxy groups (eg piperidyloxy, pyrrolyloxy, indolyloxy etc.), oxycarbonyl groups (eg methoxycarbonyl, hexadecyloxycarbonyl, phenoxycarbonyl, p-chlorophenoxycarbonyl), acyl groups (eg acetyl, pivaloyl, methacryloyl) etc , Acyloxy groups (eg acetoxy, benzoyloxy etc.), oxycarbonyloxy groups (eg methoxycarbonyloxy, octyloxycarbonyloxy, phenoxycarbonyloxy), carbamoyl groups (eg N, N-dimethylcarbamoyl, N, N-diethylcarbamoyl) , Diphenylcarbamoyl, hexylcarbamoyl, etc.), acylamide groups (for example, heptylamide, undecylamide, pentadecylamide, 1-hexylnonylamide, etc.), sulfonyl groups (including aliphatic sulfonyl groups and arylsulfonyl groups such as methanesulfonyl, Butanesulfonyl, octanesulfonyl, benzenesulfonyl, p-toluenesulfonyl, etc.), sulfinyl groups (eg methanesulfinyl, octanesulphinyl, benzene) Rufiniru, p- toluene-sulfinyl, etc.), a sulfamoyl group (e.g., dimethylsulfamoyl, etc.), an alkylthio group (e.g., methylthio, octylthio, dodecylthio, etc.) or an arylthio group (such as phenylthio). R _{b1 to} R _b5 may each be a linking group to link two or more phenol mother nuclei.
Preferred groups as R _b1 are an alkyl group, a carbamoyl group, and an acylamide group. Among them, an alkyl group is preferred, and a methyl group is particularly preferred. R _b2 is preferably an amide group, an aliphatic oxy group, or an alkylene linking group. In the case of an alkylene linking group, it is preferable that two phenol mother nuclei are linked.

  Below, the preferable structure of the compound represented by general formula (Ph) is shown.

The compound represented by formula (Ph-1) will be described in detail.
R _b6 represents an aliphatic group, an aryl group, an amino group, or an acyl group, and R _b1 has the same meaning as that defined in formula (Ph), and the preferred range is also the same. R _b7 , R _b8 , and R _b9 are each independently synonymous with R _{b2 to} R _b5 defined in the general formula (Ph), and the preferred ranges are also the same. R _b6 is preferably an aliphatic group, more preferably an unsubstituted aliphatic group, and particularly preferably a branched aliphatic group. Further, the total number of carbon atoms of R _b6 is preferably 8 or more and 25 or less, and particularly preferably 12 or more and 20 or less. R _b1 is preferably an aliphatic group, an aryl group, a carbamoyl group, or an oxycarbonyl group, more preferably an aliphatic group, and particularly preferably a methyl group. R _b7 , R _b8 and R _b9 are preferably a hydrogen atom or an aliphatic group, and particularly preferably a hydrogen atom.
In the general formula (Ph-1) 'of the present _{invention, R b1} is a methyl _group, R also b7 _{to R b9} are all Ri Oh a hydrogen _{atom, R b6} is an aliphatic group.

The compound represented by formula (Ph-2) will be described in detail.
R _b1 has the same definition as that defined in formula (Ph), and the preferred range is also the same. R _b10 represents a hydrogen atom, an aliphatic group (eg, butyl, benzyl, etc.), an acyl group (eg, acryloyl, 1-methylacryloyl, 2-methylacryloyl, etc.), an oxycarbonyl group (eg, methoxycarbonyl, butoxycarbonyl, phenoxycarbonyl, etc.) Represents a silyl group or a phosphoryl group. _Xb is an alkylene group (for example, methylene, ethylene, propylene, isopropylmethylene, pentylmethylene, etc.), a phenylene group (phenylene, etc.), -O-, -S-. R _{b11 to} R _b16 are each independently synonymous with R _{b2 to} R _b5 defined by the general formula (Ph), and the preferred range is also the same.

From the viewpoint of improving light fastness, preferred groups for R _b10 are a hydrogen atom, an acyl group, and an alkyl group, and a hydrogen atom and an acyl group are more preferred. From the viewpoint of improving light fastness, a hydrogen atom is particularly preferable. However, when _Rb10 is a hydrogen atom, the compound represented by the general formula (Ph-2) reacts with the oxidized paraphenylenediamine to produce cyan color. This is not preferable because the color is obscured. X _b is preferably an alkylene linking group, more preferably —CHR _b21 — (R _b21 represents a hydrogen atom, an aliphatic group or an aryl group), and R _b21 is particularly preferably an aliphatic group. R _b11 and R _b14 are preferably aliphatic groups, more preferably aliphatic groups having 6 or less carbon atoms, and particularly preferably methyl groups.
R _b1 is preferably an aliphatic group, an aryl group, a carbamoyl group, or an oxycarbonyl group, more preferably an aliphatic group, and particularly preferably a methyl group. R _b12 , R _b13 , R _b15 and R _b16 are preferably a hydrogen atom or an aliphatic group, and particularly preferably a hydrogen atom.

The compound represented by formula (Ph-3) will be described in detail.
R _b17 and R _b18 each independently represents an aliphatic group or an aryl group. R _b1 has the same definition as that defined in formula (Ph), and the preferred range is also the same. R _b19 and R _b20 have the same meanings as R _{b2 to} R _b5 defined in the general formula (Ph), and preferred ranges are also the same. R _b17 and R _b18 are preferably aliphatic groups. R _b19 and R _b20 are preferably a hydrogen atom or an aliphatic group, and particularly preferably a hydrogen atom. R _b1 is preferably a carbamoyl group, an oxycarbonyl group or an aliphatic group, particularly preferably a carbamoyl group or an oxycarbonyl group.

Below, the preferable specific example of a compound represented by general formula (Ph) is shown below .
Of the following, (A-1) to (A-40) are image receiving function improvers of the present invention. The image receiving function improver of the present invention is not limited by these.

The compound represented by general formula (Ph) may be used alone or in combination of several kinds.
The content of the compound represented by the general formula (Ph) in the receptor layer is preferably 1 to 20 parts by mass and preferably 2 to 10 parts by mass with respect to 100 parts by mass of the dyeable receptor polymer. More preferred.

The compound represented by the general formula (Ph) can be synthesized, for example, as follows.
Synthesis of Synthesis Example (A-22): 126 mL of acetonitrile was added to 28.7 g (0.233 mol) of 2-amino-p-cresol and 38.6 g (0.460 mol) of sodium bicarbonate, and isopalmitic acid was heated and stirred. 63.2 g (0.23 mol) of chloride are added dropwise over 30 minutes. The mixture is further heated and stirred for 1 hour, 100 mL of methanol is added, the insoluble matter is filtered off, and the insoluble matter is washed with 100 mL of methanol. The resulting solution is crystallized by dropwise addition of 50 mL of water over 25 minutes while stirring at room temperature. Cool with water and stir for another 2 hours. The precipitated crystals are filtered, washed with 250 mL of methanol / water = 5/1, and further washed with 250 mL of water. The obtained crystals are dried in a 45 ° C. blower dryer for one day to obtain 80.5 g of white crystals (yield 96.8%, melting point 82-84 ° C.). Other compounds can be synthesized in the same manner.

[Compound represented by any one of general formulas (E-1) to (E-3)]
In the heat-sensitive transfer image-receiving sheet of the present invention, a compound represented by any one of the following general formulas (E-1) to (E-3) can be used as the image-receiving function improver.

R ₄₁ represents an aliphatic group, aryl group, heterocyclic group, acyl group, aliphatic oxycarbonyl group, aryloxycarbonyl group, aliphatic sulfonyl group, arylsulfonyl group, phosphoryl group, or —Si (R ₄₇ ) (R ₄₈ ) (R ₄₉ ). Here, R ₄₇ , R ₄₈ , and R ₄₉ each independently represents an aliphatic group, an aryl group, an aliphatic oxy group, or an aryloxy group. R ₄₂ , R ₄₃ , R ₄₅ , and R ₄₆ represent a hydrogen atom or a substituent. R _{a1 to} R _a4 each independently represents a hydrogen atom or an aliphatic group (for example, methyl, ethyl). (A) R ₄₁ is an aliphatic group, acyl group, aliphatic oxycarbonyl group, aryloxycarbonyl group, or phosphoryl group, and R ₄₂ , R ₄₃ , R ₄₅ , and R ₄₆ are each independently It is preferably a hydrogen atom, an aliphatic group, an aliphatic oxy group, or an acylamino group, (b) R ₄₁ is an aliphatic group, and R ₄₂ , R ₄₃ , R ₄₅ , and R ₄₆ are each independently More preferably, it is a hydrogen atom or an aliphatic group.
Although the preferable specific example of the compound represented by either of general formula (E-1)-(E-3) below is shown, this invention is not limited by these.

The compounds represented by any one of the general formulas (E-1) to (E-3) may be used alone or in combination.
The content of the compound represented by any one of the general formulas (E-1) to (E-3) in the receiving layer is 1 to 20 parts by mass with respect to 100 parts by mass of the dyeable receiving polymer. Preferably, it is 2-10 mass parts.

[Compound represented by formula (B)]
In the heat-sensitive transfer image-receiving sheet of the present invention, a compound represented by the following general formula (B) can be used as an image-receiving function improver.

In the formula, each of R ₁ , R ₂ , and R ₃ is independently a hydrogen atom, an aliphatic group (preferably an alkyl group having 1 to 24 carbon atoms which may have a substituent, Methyl, ethyl, isopropyl, dodecyl, hexadecyl, methoxyethyl) or an aryl group (preferably an aryl group having 6 to 30 carbon atoms which may have a substituent, such as phenyl, 4-methylphenyl R _b represents an n1-valent aliphatic group (preferably an n1-valent alkyl group having 1 to 24 carbon atoms which may have a substituent, for example, methyl, ethyl, isopropyl, dodecyl , Hexadecyl, methoxyethyl, methylene, methylidene, 1,2,3-propanetriyl), aryl group (preferably n having 6 to 30 carbon atoms which may have a substituent) A valent aryl group, for example, phenyl, 4-methylphenyl, phenylene) or a heterocyclic group (preferably having at least one nitrogen, oxygen or sulfur atom which may have a substituent) 2 to 30 heterocycles, for example, the heterocycle represents pyridine, triazine, morpholine, or thiophene), and X ₂ represents a divalent organic group. Here when n2 is 2 or more, a plurality of X ₂ may be the same or different from each other. The divalent organic group is an organic group having two bonds (two positions) of a single bond, for example, the exemplified substituent (monovalent group) described in the above-mentioned explanation of the substituent. Thus, an organic group (a divalent group) having two bonds generated by the separation of an arbitrary hydrogen atom. For example, groups such as described below, -O -, - S -, - SO -, - SO 2 -, - NR X - (R X represents a hydrogen atom, an aliphatic group, a heterocyclic group). However, the compound represented by the general formula (B) has a molecular weight of 200 or more.

In the present invention, R ₁ , R ₂ and R ₃ are preferably a hydrogen atom or an aliphatic group, more preferably a hydrogen atom or an alkyl group, and particularly preferably a hydrogen atom. In the present invention, R _b is preferably an n1-valent aliphatic group or a heterocyclic ring, and more preferably an n1-valent alkyl group. In this invention, the case where n1 is 1-6 is preferable, and the case where it is 2-4 is more preferable. X ₂ is preferably a divalent group shown below, ((1)) to ((10)), ((14)) to ((17)), ((20)), ((23) ) Is more preferable, and ((1)) to ((4)), ((6)) to ((8)), ((20)), and ((23)) are particularly preferable. The compound represented by the general formula (B) has a molecular weight of 200 or more (preferably 200 to 3000), but in the present invention, the molecular weight is preferably 350 or more (preferably 350 to 2000), more preferably 350 to 1000. The case of is particularly preferable.

In the present invention, when n1 is 1, n1 is 2, and n1 is 3, respectively. When n1 is 3, _Rb is preferably a heterocyclic group.
Further, X ₂ is preferably a group represented by the following general formula (C), and particularly preferably n1 is 3.

In the formula, R _c represents an alkylene group [preferably an alkylene group having 1 to 24 carbon atoms (preferably 1 to 12, more preferably 1 to 6) which may have a substituent, for example, methylene, ethylene, propylene. , 2-methyl-1,3-propylene, 1,6-hexylene]. When n2 is 2 or more, the plurality of —R _c O— may be the same or different.

In the present invention, R ₁ is a hydrogen atom or a methyl group, R ₂ and R ₃ are hydrogen atoms, n1 is 2, 3, or 4, n2 is 1 or 2, X ₂ is ((1)) to ((4)), ((6)) to ((8)), ((20)), or ((23)), and R _b is an n1-valent alkyl. Group is preferable, R ₁ , R ₂ , R ₃ are all hydrogen atoms, n1 is 3 or 4, and X ₂ is ((1)) to ((4)), ((6 )) To ((8)), ((20)), or ((23)), and _Rb is more preferably an n1-valent alkyl group.

  Although the preferable specific example of a compound represented by general formula (B) below is shown, this invention is not limited by these.

The compound represented by the general formula (B) may be used alone or as a mixture of a plurality of compounds. In addition, many of these compounds are commercially available. For example, a product marketed under the trade name NK ester AMP-60G from Shin-Nakamura Chemical Co., Ltd. is a product containing exemplary compound (B-1). . Similarly, the product marketed by Nippon Kayaku Co., Ltd. under the trade name KAYARAD HDDA is an exemplary compound (B-24), and the product marketed by Nippon Kayaku Co., Ltd. under the trade name KAYARAD DPCA-30 is also exemplified. The compound (B-47), a product commercially available from Toagosei Chemical Co., Ltd. under the trade name Aronix M315, is a product containing (B-38) and is readily available. Further, these compounds can be synthesized by, for example, starting compounds such as pentaerythritol, esterification, amidation, reaction of alkylating agents and lactones with some compounds, and subsequent reaction with derivatives such as acrylic acid. it can. Other compounds can also be easily synthesized by ordinary reactions such as esterification and amidation.
The content of the compound represented by the general formula (B) in the receptor layer is preferably 1 to 20 parts by mass and preferably 2 to 10 parts by mass with respect to 100 parts by mass of the dyeable receptor polymer. More preferred.
[Compound represented by any one of formulas (TS-I) to (TS-VII)]
In the heat-sensitive transfer image-receiving sheet of the present invention, a compound represented by any one of the following general formulas (TS-I) to (TS-VII) can be used as the image-receiving function improver.

The compound represented by formula (TS-I) will be described in more detail.
In general formula (TS-I), R ₅₁ represents a hydrogen atom, an aliphatic group (for example, methyl, i-propyl, s-butyl, dodecyl, methoxyethoxy, allyl, benzyl), an aryl group (for example, phenyl, p- Methoxyphenyl), heterocyclic groups (eg 2-tetrahydrofuryl, pyranyl), acyl groups (eg acetyl, pivaloyl, benzoyl, acryloyl), aliphatic oxycarbonyl groups (eg methoxycarbonyl, hexadecyloxycarbonyl), aryloxycarbonyl groups (For example, phenoxycarbonyl, p-methoxyphenoxycarbonyl), aliphatic sulfonyl group (for example, methanesulfonyl, butanesulfonyl), arylsulfonyl group (for example, benzenesulfonyl, p-toluenesulfonyl), phosphoryl group (for example, diethylphosphoryl group) Represents Lil, diphenylphosphoryl Hori Le, diphenoxylate phosphate Hori le), _{or, -Si (R 58) (R} 59) a _{(R 60).} Here, R ₅₈ , R ₅₉ and R ₆₀ may be the same or different, and each independently represents an aliphatic group (for example, methyl, ethyl, t-butyl, benzyl, allyl), an aryl group (for example, phenyl), It represents an aliphatic oxy group (eg methoxy, butoxy) or an aryloxy group (eg phenoxy).

X ₅₁ represents —O— or —N (R ₅₇ ) —. Here, R ₅₇ has the same meaning as R ₅₁ .
_X55 represents -N = or -C ( _R52 ) =, _X56 represents -N = or -C ( _R54 ) =, and _X57 represents -N = or -C ( _R56 ) =. R ₅₂ , R ₅₃ , R ₅₄ , R ₅₅ and R ₅₆ each independently represent a hydrogen atom or a substituent, and preferred substituents include aliphatic groups (eg, methyl, t-butyl, t-hexyl, benzyl), An aryl group (eg phenyl), an aliphatic oxycarbonyl group (eg methoxycarbonyl, dodecyloxycarbonyl), an aryloxycarbonyl group (eg phenoxycarbonyl), an aliphatic sulfonyl group (eg methanesulfonyl, butanesulfonyl), an arylsulfonyl group ( For example, benzenesulfonyl, a p- hydroxybenzene sulfonyl) or _-X 51 _{-R 51.}

However, all of R _{51 to} R ₅₇ are not hydrogen atoms, and the total number of carbon atoms is 10 or more (preferably 10 to 50), preferably 16 or more (preferably 16 to 40). It is. Further, the compound represented by the general formula (TS-I) does not become a compound represented by the general formula (Ph) or any one of the general formulas (E-1) to (E-3) (that is, Except for the case where the compound is represented by the general formula (Ph) or any one of the general formulas (E-1) to (E-3).

The compounds represented by the general formula (TS-I) are represented by the general formula (I) described in JP-B-63-50691, and the general formulas (IIIa), (IIIb), (IIIc) described in JP-B-2-37575. ), General formula described in JP-A-2-50457, general formula described in JP-A-5-67220, general formula (IX) described in JP-A-5-70809, general formula described in JP-A-6-19534, General formula (I) described in JP-A-62-227889, general formulas (I) and (II) described in JP-A-62-244046, and general formulas (I) and (II described in JP-A-2-66541 ), General formulas (II) and (III) described in JP-A-2-139544, general formula (I) described in JP-A-2-19462, and general formulas (B) and (C ), (D), JP-A-3-200788 General formulas (III), general formulas (II) and (III) described in JP-A-3-48845, and general formulas (B), (C), (D) and 3 described in JP-A-3-266836 General formula (I) described in JP-A-969440, general formula (I) described in JP-A-4-330440, general formula (I) described in JP-A-5-297541, and general formula described in JP-A-6-130602 , General formula (1), (2), (3) described in pamphlet of International Publication No. WO91 / 11749, general formula (I) described in German Patent Application Publication No. 4008785A1, described in US Pat. No. 4,931,382 General formula (II), general formula (a) described in European Patent No. 203746B1, general formula (I) described in US Pat. No. 264730B1, and general formula (III) described in JP-A-62-289962. ) Etc. Encompasses that compound, the method described in these specifications, Shin Jikken Kagaku Koza, Vol. 14 (Maruzen Co., Ltd., 1977, 1978) can be synthesized according to the general method described in.
In the present invention, the compound represented by formula (TS-I) is preferably a compound represented by any one of formulas (TS-ID) to (TS-IH).

In the general formulas (TS-ID) to (TS-IH), R _{51 to} R ₅₇ and X ₅₁ are the same as those defined in the general formula (TS-I). However, general formula (TS-ID) is an image receiving function improver of the present invention, and in this general formula (TS-ID), R ₅₁ represents an aliphatic group, and R _{52 to} R ₅₆ are each independently R represents a hydrogen atom or a substituent, and R ₅₇ represents an aliphatic group . X ₅₂ and X ₅₃ each independently represent a divalent linking group. Examples of the divalent linking group include an alkylene group, an oxy group, and a sulfonyl group. In the formula, the same symbols in the same molecule may be the same or different.
The compound represented by any one of the general formulas (TS-ID) to (TS-IG) is a compound represented by any one of the general formula (Ph) and the general formulas (E-1) to (E-3). Never become.

With respect to the compound represented by any one of formulas (TS-ID) to (TS-IH), preferred substituents in the present invention will be described.
In (TS-ID), R ₅₁ represents a hydrogen atom, an aliphatic group, an acyl group, an aliphatic oxycarbonyl group, an aryloxycarbonyl group or a phosphoryl group, and R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ each represents Independently, it is preferably a hydrogen atom, an aliphatic group, an aliphatic oxy group or an acylamino group, R ₅₁ is an aliphatic group, and R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ are each independently hydrogen. More preferred is an atom or an aliphatic group. In the general formulas (TS-IE), (TS-IF), and (TS-IG), R ₅₁ represents a hydrogen atom, an aliphatic group, an acyl group, an aliphatic oxycarbonyl group, an aryloxycarbonyl group, or a phosphoryl group. , R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ are each independently a hydrogen atom, aliphatic group, aliphatic oxy group or acylamino group, and R ₅₄ is an aliphatic group, carbamoyl group or acylamino group, , X ₅₂ and X ₅₃ are preferably an alkylene group or an oxy group, R ₅₁ is a hydrogen atom, an aliphatic group, an acyl group or a phosphoryl group, and R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ are each independently represent a hydrogen atom, an aliphatic group, an aliphatic oxy group or an acylamino group, R ₅₄ is an aliphatic group or a carbamoyl group, X ₅₂ Contact And X ₅₃ is more preferably —CHR ₅₈ — (R ₅₈ is an alkyl group). In the general formula (TS-IH), R ₅₁ is an aliphatic group, an aryl group or a heterocyclic group, and R ₅₃ and R ₅₅ are each independently an aliphatic oxy group, an aryloxy group or a heterocyclic oxy group. It is preferable that R ₅₁ is an aryl group or a heterocyclic group, and R ₅₃ and R ₅₅ are each independently an aryloxy group or a heterocyclic oxy group.
In the present invention, the compound represented by the general formula (TS-I) is preferably a compound represented by either (TS-IE) or (TS-IG).

The compound represented by formula (TS-II) will be described in more detail.
In the general formula (TS-II), R ₆₁ , R ₆₂ , R ₆₃ and R ₆₄ each independently represent a hydrogen atom or an aliphatic group (eg, methyl, ethyl, preferably an alkyl group), and X ₆₁ is Hydrogen atom, aliphatic group (eg, methyl, ethyl, allyl), aliphatic oxy group (eg, methoxy, octyloxy, cyclohexyloxy), aliphatic oxycarbonyl group (eg, methoxycarbonyl, hexadecyloxycarbonyl), aryloxycarbonyl group (Eg phenoxycarbonyl, p-chlorophenoxycarbonyl), acyl group (eg acetyl, pivaloyl, methacryloyl), acyloxy group (eg acetoxy, benzoyloxy), aliphatic oxycarbonyloxy group (eg methoxycarbonyloxy, octyloxycarbonyloxy) ), Aryloxycarbonyloxy group (for example, phenoxycarbonyloxy), aliphatic sulfonyl group (for example, methanesulfonyl, butanesulfonyl), arylsulfonyl group (for example, benzenesulfonyl, p-toluenesulfonyl), aliphatic sulfinyl group (for example, methanesulfinyl) , Octanesulphinyl), arylsulfinyl group (for example, benzenesulfinyl, p-toluenesulfinyl), sulfamoyl group (for example, dimethylsulfamoyl), carbamoyl group (for example, dimethylcarbamoyl, diethylcarbamoyl), hydroxy group or oxy radical group. X ₆₂ is _{-C (R 61) (R 62} ) -N (X 61) -C (R 63) (R 64) - required to form together with 5- to 7-membered ring (e.g. a piperidine ring, piperazine ring) Represents a nonmetallic atom group. The total carbon number of the compound represented by the general formula (TS-II) is 8 or more (preferably 8 to 60).

  The compound represented by the general formula (TS-II) includes the general formula (I) described in JP-B-2-32298, the general formula (I) described in JP-A-3-39296, and described in JP-A-3-40373. General formula (I) described in JP-A-2-49762, general formula (II) described in JP-A-2-208653, general formula (III) described in JP-A-2-217845, US Pat. 4906555, the general formula described in European Patent Application 309400A2, the general formula described in 309401A1, the general formula described in 309402A1, and the like. Can be synthesized according to the general methods described in the methods described in these specifications, New Experimental Science Vol. 14 (Maruzen Co., Ltd., 1977, 1978).

With respect to the compound represented by formula (TS-II), preferred substituents in the present invention will be described. In the present invention, R ₆₁ , R ₆₂ , R ₆₃ and R ₆₄ are preferably an aliphatic group, and more preferably a methyl group. In the present invention, X ₆₁ is preferably a hydrogen atom, an aliphatic group, an aliphatic oxy group, an acyl group, an acyloxy group or an oxy radical group, and a hydrogen atom, an aliphatic group, an aliphatic oxy group, an acyl group, Or it is more preferable when it is an oxy radical group, and it is most preferable when it is an aliphatic group or an aliphatic oxy group. In the present _{invention, X 62} is _{-C (R 61) (R 62} ) -N (X 61) -C (R 63) (R 64) - with the preferred case of forming a 6-membered ring, form a piperidine ring If so, it is more preferable. In the present invention, the compound represented by formula _{(TS-II), R61,} R 62, R 63 and _{R 64} is a methyl _{group, X 61} is a hydrogen atom, an aliphatic group, an aliphatic oxy group, It is preferably an acyl group or an oxy radical group, and X ₆₂ forms a 6-membered ring with —C (R ₆₁ ) (R ₆₂ ) —N (X ₆₁ ) —C (R ₆₃ ) (R ₆₄ ) —. R ₆₁ , R ₆₂ , R ₆₃ and R ₆₄ are more preferably a methyl group, X ₆₁ is an aliphatic group or an aliphatic oxy group, and X ₆₂ forms a piperidine ring.

The compound represented by formula (TS-III) will be described in more detail.
In general formula (TS-III), R ₆₅ and R ₆₆ are each independently a hydrogen atom, an aliphatic group (eg, methyl, ethyl, t-butyl, octyl, methoxyethoxy), an aryl group (eg, phenyl, 4-methoxyphenyl). ), Acyl groups (eg acetyl, pivaloyl, methacryloyl), aliphatic oxycarbonyl groups (eg methoxycarbonyl, hexadecyloxycarbonyl), aryloxycarbonyl groups (eg phenoxycarbonyl), carbamoyl groups (eg dimethylcarbamoyl, phenylcarbamoyl), aliphatic sulfonyl group (e.g. methanesulfonyl, butanesulfonyl), an arylsulfonyl group (e.g., benzenesulfonyl), R ₆₇ is a hydrogen atom, an aliphatic group (e.g. methyl, ethyl, t- butyl, octyl, methoxy ethoxy An aliphatic oxy group (for example, methoxy, octyloxy), an aryloxy group (for example, phenoxy, p-methoxyphenoxy), an aliphatic thio group (for example, methylthio, octylthio), an arylthio group (for example, phenylthio, p-methoxyphenylthio), An acyloxy group (for example, acetoxy, pivaloyloxy), an aliphatic oxycarbonyloxy group (for example, methoxycarbonyloxy, octyloxycarbonyloxy), an aryloxycarbonyloxy group (for example, phenoxycarbonyloxy), a substituted amino group (if the substituent can be substituted) For example, a substituted amino group such as an aliphatic group, aryl group, acyl group, aliphatic sulfonyl group, arylsulfonyl group, etc.), heterocyclic group (eg piperidine ring, thiomorpholine ring) or hydroxy group It represents, where possible _{R 65} and _{R 66, R 66} and _{R 67, R 65} and _{R 67} are bonded to each other 5- to 7-membered ring (e.g. morpholine ring, pyrazolidine ring). However, R ₆₅ and R ₆₆ are not hydrogen atoms at the same time, and the total number of carbon atoms of the compound represented by the general formula (TS-III) is 7 or more (preferably 7 to 50).

The compound represented by the general formula (TS-III) includes a general formula (I) described in JP-B-6-97332, a general formula (I) described in JP-B-6-97334, and JP-A-2-148037. The general formula (I) described in the publication, the general formula (I) described in the publication 2-150841, the general formula (I) described in the publication 2-181145, and the general formula (I) described in the publication 3-266836 And the compounds represented by the general formula (IV) described in JP-A-4-350854, the general formula (I) described in JP-A-5-61166, etc. It can be synthesized according to the general method described in Experimental Science Vol. 14 (Maruzen Co., Ltd., 1977, 1978).
In the present invention, the compound represented by the general formula (TS-III) is preferably a compound represented by any one of the general formulas (TS-IIIA) to (TS-IIID), and among these, the image reception of the present invention. The function improver is a compound represented by either general formula (TS-IIIB) or (TS-IIIC).

In the general formulas (TS-IIIA) and (TS-IIID), R _{65 to} R ₆₆ are the same as those defined in the general formula (TS-III). _{R c1,} R _c2 and R _c5 is Ru synonymous der and _{R 65.} R _c4 is a hydrogen atom, an aliphatic group (for example, octyl, dodecyl, 3-phenoxypropyl) or an aryl group (for example, phenyl, 4-dodecyloxyphenyl). In the general formulas (TS-IIIB) and (TS-IIIC) which are image receiving function improvers of the present invention, R ₆₅ represents a hydrogen atom, and R _c3 represents an aryl group. X ₆₃ represents a nonmetallic atom group necessary for forming a pyrazolidine ring together with —N—N—, R ₆₅ ′ and R ₆₆ each independently represents an aliphatic group, and R _c3 ′ represents an aliphatic group.

With respect to the compound represented by any one of the general formulas (TS-IIIA) and (TS-IIID), preferred substituents in the present invention will be described. In the general formula (TS-IIIA), R ₆₅ and R _c1 are each independently a hydrogen atom, an aliphatic group or an aryl group, and R ₆₆ and R _c2 are each independently an aliphatic group, an aryl group or an acyl group. It is preferable that R ₆₅ and R _c1 are each independently an aliphatic group, and R ₆₆ and R _c2 are each independently an aliphatic group, an aryl group, or an acyl group . In one general formula _{(TS-IIID), R 65} is a hydrogen atom, an aliphatic group, an aryl group, an acyl group, or a carbamoyl _group, a _{R c5} is an aliphatic group or an aryl _{group, R c4} fat It is preferable that R ₆₅ is an aliphatic group, an aryl group, an acyl group or a carbamoyl group, R _c5 is an aliphatic group or an aryl group, and R _c4 is an aliphatic group or an aryl group or an aryl group. The aryl group is more preferable.
In the present invention, the compound represented by the general formula (TS-III) is more preferably a compound represented by the general formula (TS-IIIB), (TS-IIIC) or (TS-IIID). IIIB) or a compound represented by (TS-IIIC) is the most preferred rather, the image reception function improver of the present invention.

The compound represented by formula (TS-IV) will be described in more detail.
In the general formula (TS-IV), R ₇₁ and R ₇₂ are each independently an aliphatic group (eg, methyl, methoxycarbonylethyl, dodecyloxycarbonylethyl, benzyl), an aryl group (eg, phenyl, 4-octyloxyphenyl, 2-butoxy-5-(t) octylphenyl) or a Hajime Tamaki (e.g., 2-pyridyl, 2-pyrimidyl), _{further, R 71} represents a hydrogen atom, lithium, sodium or _{potassium,, R 71} and _{R 72} is They may be bonded to each other to form a 5- to 7-membered ring (for example, a tetrahydrothiophene ring or a thiomorpholine ring). q represents 0, 1 or 2. However, the total number of carbon atoms of R ₇₁ and R ₇₂ is 10 or more (preferably 10 to 60).

  The compound represented by the general formula (TS-IV) includes a general formula (I) described in JP-B-2-44052, a general formula (T) described in JP-A-3-48242, and 3-266636. General formula (A) described, general formula (I), (II), (III) described in JP-A-5-323545, general formula (I) described in JP-A-6-148837, US Pat. No. 4,933,271 Including the compounds represented by the general formula (I) described in the description, the general formula (1) described in the specification of No. 4770987, etc., and the methods described in these specifications, New Experimental Science Vol. 14 (Maruzen Co., Ltd., 1977, 1978) can be synthesized according to the general method described.

In the present invention, in general formula (TS-IV), q is preferably 0 or 2, and when q is 0, R ₇₁ and R ₇₂ are each independently an aliphatic group or an aryl group. Or when R ₇₁ and R ₇₂ are combined to form a 6-membered ring, and when q is 2, R ₇₁ is a hydrogen atom, sodium, potassium, an aliphatic group or an aryl group, R ₇₂ is preferably an aliphatic group or an aryl group, more preferably R ₇₁ is a hydrogen atom, sodium or potassium, and R ₇₂ is an aryl group.

The compound represented by formula (TS-V) will be described in more detail.
In the general formula (TS-V), R ₈₁ , R ₈₂ and R ₈₃ are each independently an aliphatic group (eg, methyl, ethyl, t-octyl, allyl), an aryl group (eg, phenyl, 4-t-butylphenyl). 4-vinylphenyl), aliphatic oxy groups (eg methoxy, t-octyloxy), aryloxy groups (eg phenoxy, 2,4-di-t-butylphenoxy), aliphatic amino groups (eg butylamino, dibutyl) Amino) or an arylamino group (for example, anilino, 4-methoxyanilino, N-methylanilino), and t represents 0 or 1. R ₈₁ and R ₈₂ , R ₈₁ and R ₈₃ may be bonded to each other to form a 5- to 8-membered ring. However, the total number of carbon atoms of R ₈₁ , R ₈₂ , and R ₈₃ is 10 or more (preferably 10 to 50).

  The compound represented by the general formula (TS-V) includes general formula (I) described in JP-A-3-25437, general formula (I) described in JP-A-3-142444, US Pat. No. 4,749, Including compounds represented by the general formula described in the '645 specification, the general formula described in the' 4,980,275 specification, etc., the methods described in these specifications, New Experimental Science Course No. 14 It can be synthesized according to the general method described in the volume (Maruzen Co., Ltd., 1977, 1978).

In the present invention, in general formula (TS-V), t is 1, and R ₈₁ , R ₈₂ and R ₈₃ are each independently an aliphatic group, an aryl group, an aliphatic oxy group, an aryloxy group or It is preferably an arylamino group (preferably when at least one of R ₈₁ , R ₈₂ and R ₈₃ is an aliphatic group, an aryl group, an aliphatic oxy group or an aryloxy group), and R ₈₁ and R ₈₂ are Even when bonded to form an 8-membered ring, t is 1 and R ₈₁ , R ₈₂ and R ₈₃ are each independently an aryl group, aliphatic oxy group or aryloxy group (preferably Is more preferred when at least one of R ₈₁ , R ₈₂ and R ₈₃ is an aryl group or an aryloxy group.

The compound represented by formula (TS-VI) will be described in more detail.
In the general formula (TS-VI), R ₈₅ , R ₈₆ , R ₈₇ and R ₈₈ each independently represent a hydrogen atom or a substituent other than a carbonyl group (for example, aliphatic, aryl, acylamino). However, not all of R ₈₅ , R ₈₆ , R ₈₇ and R ₈₈ are hydrogen atoms, and any two of R ₈₅ , R ₈₆ , R ₈₇ and R ₈₈ are bonded to each other, and a 5- to 7-membered ring (for example, (Cyclohexene ring, cyclohexane ring) may be formed, but an aromatic ring having only carbon atoms is not formed. The total number of carbon atoms of the compound represented by the general formula (TS-VI) is 10 or more (preferably 10 to 50). Moreover, the compound represented by general formula (TS-VI) does not turn into the alkenylcarbonyl type compound represented by general formula (B).

  The compound represented by the general formula (TS-VI) is represented by the general formula (I) described in US Pat. No. 4,713,317, the general formula (I) described in JP-A-8-44017, and 8-44018. General formula (I) described, General formula (I) described in JP-A-8-44019, General formula (I), (II) described in JP-A-8-44020, General formula described in JP-A-8-44021 (I), including the compounds represented by the general formulas (I), (II) and the like described in JP-A-8-44022, methods described in these specifications, New Experimental Science Vol. 14 ( Can be synthesized according to the general method described in Maruzen Co., Ltd., 1977, 1978).

  In the present invention, the compound represented by the general formula (TS-VI) is preferably a compound represented by any one of the general formula (TS-VIB) and (TS-VIC).

In the general formulas (TS-VIB) and (TS-VIC), R ₈₅ is the same as defined in the general formula (TS-VI). R _d2 and R _d3 each independently represents an alkenyl group (eg, vinyl, allyl, oleyl), and R _d4 represents a hydrogen atom, an aliphatic group (eg, methyl, allyl, vinyl, octyl) or an aryl group (eg, phenyl, naphthyl) , 4-vinylphenyl). u and v each independently represent 1, 2 or 3.
With respect to the compound represented by any one of formulas (TS-VIB) and (TS-VIC), preferred substituents in the present invention will be described. In the general formula (TS-VIB), it is preferable that R ₈₅ is an aliphatic group or an aryl group, R _d2 is an alkenyl group, and u is 1, 2 or 3, and R ₈₅ is aliphatic. More preferably, it is a group or an aryl group, R _d2 is an alkenyl group, and u is 2 or 3. In the general formula (TS-VIC), R ₈₅ is an aliphatic group or an aryl group, R _d3 is an alkenyl group, R _d4 is a hydrogen atom or an aliphatic group, u is 1, 2 or preferably represents 3, R ₈₅ is an aliphatic group or an aryl group, an R _d3 is an alkenyl group and R _d4 is a hydrogen atom, an alkenyl group, u is 2 or 3 Is more preferable.
In the present invention, a compound represented by (TS-VIB) in general formula (TS-VI) is preferable.

Next, the compound represented by general formula (TS-VII) is demonstrated.
R ₉₁ represents an aliphatic or aromatic hydrophobic group having a total number of carbon atoms of 10 or more (preferably 10 to 50, more preferably 10 to 32), preferably an alkyl group having 1 to 32 carbon atoms. Alkenyl group having 2 to 32 carbon atoms, alkynyl group having 2 to 32 carbon atoms, cycloalkyl group having 3 to 32 carbon atoms, cycloalkenyl group having 3 to 32 carbon atoms, and the like. The alkyl group, alkenyl group and alkynyl group may be linear or branched. These aliphatic hydrophobic groups include those having a substituent.

  Examples of the aromatic hydrophobic group include an aryl group (for example, a phenyl group) and an aromatic heterocyclic group (for example, a pyridyl group, a furyl group). These aromatic groups include those having a substituent.

R ₉₁ is preferably an alkyl group or an aryl group, respectively. The substituent of the aliphatic group or aromatic group represented by R ₉₁ is not particularly limited, but is preferably an alkoxy group, aryloxy group, acyl group, acyloxy group, alkoxycarbonyl group, aryloxycarbonyl group, carbamoyl group. , Sulfamoyl group, acylamino group, amino group and the like. More preferred is an aliphatic group.

Y ₉₁ represents a monovalent organic group containing an alcoholic hydroxyl group. Y ₉₁ is preferably a monovalent organic group represented by the following general formula [AL].
Formula [AL] Y _92- (L ₉₂ ) m _92-
In the formula, Y ₉₂ represents a compound residue obtained by removing a hydrogen atom from one of a plurality of hydroxyl groups contained in a polyhydric alcohol, and L ₉₂ represents a divalent linking group. m ₉₂ represents 0 or 1.
Glycerin as the polyhydric alcohol which is a group represented by Y ₉₂ except wherein the hydrogen atom, polyglycerol, pentaerythritol, trimethylolpropane, neopentyl glycol, sorbitan, sorbide, sorbitol, sugars and the like are preferable. The divalent linking group represented by L ₉₂ is preferably —C (═O) — or —SO ₂ —.

In addition, as a preferable compound in another form of the compound represented by the general formula (TS-VII), R ₉₁ is an aliphatic group having 12 or more carbon atoms (preferably an alkyl group or alkenyl having 12 to 32 carbon atoms). And Y ₉₁ is an OH group.

[Metal complex]
In the heat-sensitive transfer image-receiving sheet of the present invention, a metal complex can be used as an image-receiving function improver.
The metal complex preferably has a central metal of copper (Cu), cobalt (Co), nickel (Ni), palladium (Pd), or platinum (Pt), more preferably nickel (Ni). Further, the solubility in water is preferably low (preferably the solubility at room temperature is 50% or less, more preferably 25% or less, and further preferably 10% or less). Preferred compounds can also be defined by the number of carbon atoms in the whole compound, preferably 15 to 65, more preferably 20 to 60, still more preferably 25 to 55, and particularly preferably 30 to 50. In the present invention, the metal complex may have any ligand. A dithiolate complex or a salicylaldoxime complex is preferable, and a salicylaldoxime complex is more preferable.

As metal complexes, many are known and effective, such as dithiolate-based nickel complexes and salicylaldoxime-based nickel complexes, but the general formula (I) described in JP-B-61-13736 and described in JP-A-61-13737 General formula (I), general formula (I) described in JP-A-61-13738, general formula (I) described in JP-A-61-13739, general formula (I) described in JP-A-61-13740, General formula (I) described in JP-A-61-13742, general formula (I) described in JP-A-61-13743, general formula (I) described in JP-A-61-13744, and JP-B-5-69212 General formulas (I) and (II) described in JP-A-5-88809, general formulas described in JP-A-63-199248, and general formulas (I) and (II described in JP-A-64-75568 ), JP General formulas (I) and (II) described in JP-A-182749, and general formulas (II), (III), (IV) and (V) described in US Pat. No. 4,590,153 described in US Pat. No. 4,912,027 The compounds described in the general formulas (II), (III), (IV) and the like are preferable.
As the metal complex that can be used in the present invention, a compound represented by the general formula (TS-VIIIA) is preferable.

In the general formula (TS-VIIIA), R ₁₀₁ , R ₁₀₂ , R ₁₀₃ and R ₁₀₄ are each independently a hydrogen atom or a substituent (for example, an aliphatic group, an aliphatic oxy group, an aliphatic sulfonyl group, an arylsulfonyl group, R ₁₀₅ represents a hydrogen atom, an aliphatic group (eg, methyl, ethyl, vinyl, undecyl) or an aryl group (eg, phenyl, naphthyl), and R ₁₀₆ represents a hydrogen atom, an aliphatic group (eg, methyl, Ethyl), an aryl group (for example, phenyl, 4-methylphenyl) or a hydroxy group. M represents copper (Cu), cobalt (Co), nickel (Ni), palladium (Pd), or platinum (Pt). Two R ₁₀₆ may be bonded to each other to form a 5- to 7-membered ring, and adjacent R ₁₀₁ and R ₁₀₂ , R ₁₀₂ and R ₁₀₃ , R ₁₀₃ and R ₁₀₄ , R ₁₀₄ and R ₁₀₅ are bonded to each other. , 5-6 membered rings may be formed.
In the present invention, in the general formula (TS-VIIIA), R ₁₀₁ , R ₁₀₂ , R ₁₀₃ and R ₁₀₄ are a hydrogen atom, an aliphatic group or an aliphatic oxy group, R ₁₀₅ is a hydrogen atom, and R ₁₀₆ is It is preferably a hydrogen atom, an aliphatic group or a hydroxy group, and M is preferably nickel (Ni), and R ₁₀₁ , R ₁₀₂ , R ₁₀₃ and R ₁₀₄ are a hydrogen atom or an aliphatic oxy group, and R ₁₀₅ More preferably, is a hydrogen atom, R ₁₀₆ is a hydroxy group, and M is nickel (Ni).

[Ultraviolet absorber]
In the heat-sensitive transfer image-receiving sheet of the present invention, an ultraviolet absorber can be used as an image-receiving function improving agent.
The ultraviolet absorber preferably used in the present invention may be any compound as long as it has a maximum absorption wavelength (λmax) at 400 nm or less, but preferably the following general formulas (UA), (UB), (UC), ( UD) and (UE).

In the formula, R ₂₁ represents a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, and R ₂₂ and R ₂₃ may be the same or different, and each independently represents a hydrogen atom, a substituted or unsubstituted alkyl group, Represents a substituted or unsubstituted aryl group.

More specifically, in the formula, R ₂₁ represents a hydrogen atom, a halogen atom (eg, Cl, Br), an alkyl group having 1 to 5 carbon atoms (eg, methyl, ethyl, butyl, etc.), or an alkoxy group having 1 to 4 carbon atoms. (For example, methoxy, butoxy, etc.), R ₂₂ and R ₂₃ may be the same or different, and each may be a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms (for example, methyl, ethyl, secbutyl). , Tertbutyl, tertoctyl, dodecyl, carboxyethyl, n-octyloxycarbonylethyl, etc.) or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms (eg phenyl, p-chlorophenyl, p-methoxyphenyl, etc.) Represents.

In the formula, R ₂₄ , R ₂₅ , and R ₂₆ may be the same or different, and each independently represents a hydrogen atom, an alkoxy group having 1 to 12 carbon atoms (for example, methoxy, ethoxy, dodecyloxy, etc.) or a hydroxyl group. Represent.

In the formula, R ₂₇ represents a hydroxyl group, an alkoxy group or an alkyl group. R ₂₈ and R ₂₉ each independently represent a hydrogen atom, a hydroxyl group, an alkoxy group or an alkyl group, and R ₂₈ and R ₂₇ or R ₂₉ and R ₂₇ are adjacent to each other to form a 5- to 6-membered ring. May be. Xa and Ya each independently represent —CN, —COR ₄₀ , —COOR ₄₀ , —SO ₂ R ₄₀ , —CON (R ₄₀ ) (R ₄₁ ) or —COOH, and Xa and Ya are the same or different from each other. It may be. R ₄₀ and R ₄₁ each independently represents an alkyl group or an aryl group, and R ₄₁ may be a hydrogen atom.

More specifically, R ₂₇ is a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms (eg, methoxy, ethoxy, n-butoxy, etc.), an alkyl group having 1 to 6 carbon atoms (eg, methyl, ethyl, t-butyl, R ₂₈ and R ₂₉ represent a hydrogen atom, hydroxy, an alkoxy group having the same meaning as R _27, and an alkyl group, and are located next to R ₂₈ and R ₂₇ , R ₂₉ and R _27. You may form a 5-6 membered ring (for example, a methylenedioxy ring). _{Xa, Ya} are _{-CN, -COR 40, -COOR 40,} -SO 2 R 40, -CON (R 40) (R 41), - represents COOH, Xa, Ya may be the same or different from each other . R ₄₀ and R ₄₁ are substituted or unsubstituted alkyl groups having 1 to 16 carbon atoms (eg, methyl, ethyl, methoxyethyl, n-hexyl, phenoxyethyl, etc.), substituted or unsubstituted groups having 6 to 12 carbon atoms. Represents an aryl group (for example, phenyl, p-chlorophenyl, p-methylphenyl, p-tertbutylphenyl, etc.), and R ₄₁ may be a hydrogen atom.

In the formula, R ₃₀ and R ₃₁ each independently represent a hydrogen atom, an alkyl group, an alkenyl group or an aryl group, and R ₃₀ and R ₃₁ may be the same or different from each other, but are not simultaneously hydrogen atoms. . Moreover, you may form a 5-6 membered ring with N. Xa and Ya have the same meaning as described for the general formula (UC).

More specifically, R ₃₀ and R ₃₁ are a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms (for example, methyl, ethyl, t-butyl, n-dodecyl, methoxyethyl, ethoxyethyl, etc.), carbon atom Represents an alkenyl group of 3 to 6 or an aryl group (for example, phenyl, tolyl, p-chlorophenyl, p-methoxyphenyl, etc.), and R ₃₀ and R ₃₁ may be the same as or different from each other, but are simultaneously hydrogen atoms. There is nothing. Moreover, you may form 5-6 membered ring (for example, a piperidine ring, a morpholine ring, etc.) with N. Xa and Ya have the same meaning as described for the general formula (UC).

In the formula, R ₃₂ , R ₃₃ and R ₃₄ each independently represents a substituted or unsubstituted alkyl group, aryl group, alkoxy group, aryloxy group or heterocyclic group. However, at least one of R ₃₂ , R ₃₃ , and R ₃₄ represents the following general formula (UF).

In the formula, each of R ₃₅ and R ₃₆ independently represents a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, or an aryloxy group.
Specific examples of the compounds represented by formulas (TS-I) to (TS-VII), metal complexes, and ultraviolet absorbers are shown below.
Among these, the compounds represented by any one of the general formulas (TS-ID), (TS-IIIB) or (TS-IIIC) of the present invention are (TI-5), (TI-8), (TI-10). ), (TII-6), (TII-9), (TII-12), (TII-13), (TIII-4), (TIII-6), (TIII-8), and (TIII-9) However, the present invention is not limited to these.

[Water-insoluble and organic solvent-soluble homopolymer or copolymer]
In the heat-sensitive transfer image-receiving sheet of the present invention, a water-insoluble and organic solvent-soluble homopolymer or copolymer can be used as the image-receiving function improver.
Various types of water-insoluble and organic solvent-soluble homopolymers or copolymers (hereinafter referred to as copolymers used in the present invention) can be used. For example, those shown below can be preferably used. In addition, although there are some which overlap with the dyeable accepting polymer described above, it means that a different one from that used as the dyeable accepting polymer is used in combination.

(1) Vinyl polymer and copolymer Acrylic acid ester: For example, methyl acrylate, ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, tert-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, amyl Acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, tert-octyl acrylate, 2-chloroethyl acrylate, 2-bromoethyl acrylate, 4-chlorobutyl acrylate, cyanoethyl acrylate, 2-acetoxyethyl acrylate, dimethylaminoethyl acrylate, Benzyl acrylate, methoxybenzyl acrylate, 2-chlorocyclohexyl acrylate, cyclo Hexyl acrylate, furfuryl acrylate, tetrahydrofurfuryl acrylate, phenyl acrylate, 5-hydroxypentyl acrylate, 2,2-dimethyl-3-hydroxypropyl acrylate, 2-methoxyethyl acrylate, 3-methoxybutyl acrylate, 2-ethoxyethyl acrylate 2-iso-propoxyethyl acrylate, 2-butoxyethyl acrylate, 2- (2-methoxyethoxy) ethyl acrylate, 2- (2-butoxyethoxy) ethyl acrylate, ω-methoxypolyethylene glycol acrylate (addition mole number n = 9) ), 1-bromo-2-methoxyethyl acrylate, 1,1-dichloro-2-ethoxyethyl acrylate;

Methacrylic acid ester: for example, methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, tert-butyl methacrylate, isobutyl methacrylate, sec-butyl methacrylate, amyl methacrylate, hexyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, Chlorobenzyl methacrylate, octyl methacrylate, sulfopropyl methacrylate, N-ethyl-N-phenylaminoethyl methacrylate, 2- (3-phenylpropyloxy) ethyl methacrylate, dimethylaminophenoxyethyl methacrylate, furfuryl methacrylate, tetrahydrofurfuryl methacrylate, phenyl Meta relay , Cresyl methacrylate, naphthyl methacrylate, 2-hydroxyethyl methacrylate, 4-hydroxybutyl methacrylate, triethylene glycol monomethacrylate, dipropylene glycol monomethacrylate, 2-methoxyethyl methacrylate, 3-methoxybutyl methacrylate, 2-acetoxyethyl methacrylate, 2-acetoacetoxyethyl methacrylate, 2-ethoxyethyl methacrylate, 2-iso-propoxyethyl methacrylate, 2-butoxyethyl methacrylate, 2- (2-methoxyethoxy) ethyl methacrylate, 2- (2-ethoxyethoxy) ethyl methacrylate, 2 -(2-butoxyethoxy) ethyl methacrylate, ω-methoxypolyethylene glycol methacrylate (with Mol number n = 6);

Vinyl esters: for example, vinyl acetate, vinyl propionate, vinyl butyrate, vinyl isobutyrate, vinyl caproate, vinyl chloroacetate, vinyl methoxy acetate, vinyl phenyl acetate, vinyl benzoate, vinyl salicylate; acrylamide: for example Acrylamide, methylacrylamide, ethylacrylamide, propylacrylamide, butylacrylamide, tert-butylacrylamide, cyclohexylacrylamide, benzylacrylamide, hydroxymethylacrylamide, methoxyethylacrylamide, dimethylaminoethylacrylamide, phenylacrylamide, dimethylacrylamide, diethylacrylamide, β- Cyanoethylacrylamide, N- (2-a DOO acetoxyethyl) acrylamide, diacetone acrylamide;

Methacrylamide: for example, methacrylamide, methyl methacrylamide, ethyl methacrylamide, propyl methacrylamide, butyl methacrylamide, tert-butyl methacrylamide, cyclohexyl methacrylamide, benzyl methacrylamide, hydroxymethyl methacrylamide, methoxyethyl methacrylamide, dimethyl Aminoethylmethacrylamide, phenylmethacrylamide, dimethylmethacrylamide, diethylmethacrylamide, β-cyanoethylmethacrylamide, N- (2-acetoacetoxyethyl) methacrylamide;

Olefins: for example, dicyclopentadiene, ethylene, propylene, 1-butene, 1-pentene, vinyl chloride, vinylidene chloride, isoprene, chloroprene, butadiene, 2,3-dimethylbutadiene; styrenes: for example, styrene, methylstyrene, Dimethyl styrene, trimethyl styrene, ethyl styrene, isopropyl styrene, chloromethyl styrene, methoxy styrene, chloro styrene, dichloro styrene, bromo styrene, vinyl benzoic acid methyl ester;

Crotonic acid esters: for example butyl crotonate, hexyl crotonic acid; itaconic acid diesters: for example dimethyl itaconate, diethyl itaconate, dibutyl itaconate; maleic acid diesters: for example diethyl maleate, dimethyl maleate, maleic acid Dibutyl; fumaric acid diesters: for example, diethyl fumarate, dimethyl fumarate, dibutyl fumarate;

Examples of other monomers include the following.
Allyl compounds: for example allyl acetate, allyl caproate, allyl laurate, allyl benzoate; vinyl ethers: for example methyl vinyl ether, butyl vinyl ether, hexyl vinyl ether, methoxyethyl vinyl ether, dimethylaminoethyl vinyl ether; vinyl ketones: for example methyl vinyl Ketone, phenyl vinyl ketone, methoxyethyl vinyl ketone; vinyl heterocycle: for example, vinylpyridine, N-vinylimidazole, N-vinyloxazolidone, N-vinyltriazole, N-vinylpyrrolidone;
Glycidyl esters: for example, glycidyl acrylate, glycidyl methacrylate;
Unsaturated nitriles: For example, acrylonitrile, methacrylonitrile;

  The polymer preferably used in the present invention may be a homopolymer of the above-mentioned monomer, or may be a copolymer composed of two or more kinds of monomers as required. Furthermore, the polymer used in the present invention may contain a monomer having an acid group to such an extent that it does not become water-soluble (preferably 20% or less), but preferably does not contain at all. However, this is not the case when the monomer is a compound represented by the general formula (B) used in the present invention. Examples of the monomer having an acid group include acrylic acid; methacrylic acid; itaconic acid; maleic acid; monoalkyl itaconic acid (for example, monomethyl itaconic acid); monoalkyl maleate (for example, monomethyl maleate); citraconic acid; Acid; vinyl benzyl sulfonic acid; vinyl benzene sulfonic acid; acryloyloxyalkyl sulfonic acid (for example, acryloyloxymethyl sulfonic acid); methacryloyloxyalkyl sulfonic acid (for example, methacryloyloxymethyl sulfonic acid, methacryloyloxyethyl sulfonic acid, methacryloyloxypropyl) Sulfonic acid); acrylamide alkylsulfonic acid (for example, 2-acrylamido-2-methylethanesulfonic acid, 2-acrylamido-2-methylpropanesulfone) Acid, 2-acrylamido-2-methylbutanesulfonic acid); methacrylamide alkylsulfonic acid (for example, 2-methacrylamide-2-methylethanesulfonic acid, 2-methacrylamide-2-methylpropanesulfonic acid, 2-methacrylamide) -2-methylbutanesulfonic acid); acryloyloxyalkyl phosphate (eg, acryloyloxyethyl phosphate, 3-acryloyloxypropyl-2-phosphate); methacryloyloxyalkyl phosphate (eg, methacryloyloxyethyl phosphate, 3-methacryloyloxypropyl- 2-phosphate) and the like.

  The monomer having an acid group may be an alkali metal (for example, sodium, potassium, etc.) or a salt of ammonium ion.

As the monomer for forming the polymer used in the present invention, acrylate, methacrylate, acrylamide and methacrylamide are preferable.
The polymer formed from the monomer is obtained by a solution polymerization method, a bulk polymerization method, a suspension polymerization method and a latex polymerization method. As the initiator used for these polymerizations, a water-soluble polymerization initiator and a lipophilic polymerization initiator are used.

  Examples of the water-soluble polymerization initiator include persulfates such as potassium persulfate, ammonium persulfate, and sodium persulfate, sodium 4,4′-azobis-4-cyanovalerate, 2,2′-azobis (2-amidino Water-soluble azo compounds such as propane) hydrochloride and hydrogen peroxide can be used.

  Examples of the lipophilic polymerization initiator include azobisisobutyronitrile, 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (4-methoxy-2,4-dimethylvalero). Nitrile), 1,1′-azobis (cyclohexanone-1-carbonitrile), dimethyl 2,2′-azobisisobutyrate, diethyl 2,2′-azobisisobutyrate, benzoyl peroxide, lauryl peroxide, Examples include diisopropyl peroxydicarbonate and di-tert-butyl peroxide.

(2) Polyester resin obtained by condensation of polyhydric alcohol and polybasic acid Polyhydric alcohol includes HO-Ra-OH (Ra is a hydrocarbon having 2 to about 12 carbon atoms, particularly aliphatic hydrocarbons. ) Or a polyalkylene glycol is effective, and as the polybasic acid, HOOC-Rb-COOH (Rb represents a simple bond or a hydrocarbon having 1 to 12 carbon atoms). What you have is effective.

  Specific examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, trimethylolpropane, 1,4-butanediol, isobutylenediol, 1,5- Pentanediol, neopentyl glycol, 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, 1,11-undecanediol, 1 , 12-dodecanediol, 1,13-tridecanediol, 1,14-tetradecanediol, glycerin, diglycerin, triglycerin, 1-methylglycerin, erythrite, mannitol, sorbit and the like.

  Specific examples of the polybasic acid include oxalic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, corkic acid, azelaic acid, sebacic acid, nonanedicarboxylic acid, decanedicarboxylic acid, undecanedicarboxylic acid, dodecanedicarboxylic acid, fumaric acid. Acid, maleic acid, itaconic acid, citraconic acid, phthalic acid, isophthalic acid, terephthalic acid, tetrachlorophthalic acid, methaconic acid, isohymelic acid, cyclopentadiene-maleic anhydride adduct, rosin-maleic anhydride adduct .

(3) Polyesters obtained by ring-opening polymerization method These polyesters are obtained from β-propiolactone, ε-caprolactone, dimethylpropiolactone and the like.
(4) Others Polycarbonate resin obtained by polycondensation of glycol or dihydric phenol with carbonate ester or phosgene, polyurethane resin obtained by polyaddition of polyhydric alcohol and polyisocyanate, polyhydric amine and polybasic acid Polyamide resin etc. which are obtained more are mentioned.

  The number average molecular weight of the polymer used in the present invention is not particularly limited, but is preferably 200,000 or less, more preferably 800 or more and 100,000 or less.

Although the specific example of the polymer used for this invention is shown below, it is not limited to these. (The composition of the copolymer is expressed by mass ratio.)
P-1) Poly (N-sec-butylacrylamide)
P-2) Poly (N-tert-butylacrylamide)
P-3) Diacetone acrylamide-methyl methacrylate copolymer (25:75)
P-4) Polycyclohexyl methacrylate P-5) N-tert-butylacrylamide-methyl methacrylate copolymer (60:40)
P-6) Poly (N, N-dimethylacrylamide)
P-7) Poly (tert-butyl methacrylate)
P-8) Polyvinyl acetate P-9) Polyvinyl propionate P-10) Polymethyl methacrylate

P-11) Polyethyl methacrylate P-12) Polyethyl acrylate P-13) Vinyl acetate-vinyl alcohol copolymer (90:10)
P-14) Poly-n-butyl acrylate P-15) Poly-n-butyl methacrylate P-16) Polyisobutyl methacrylate P-17) Polyisopropyl methacrylate P-18) Polyoctyl acrylate P-19) n-butyl acrylate Acrylamide copolymer (95: 5)
P-20) Stearyl methacrylate-acrylic acid copolymer (90:10)

P-21) Methyl methacrylate-vinyl chloride copolymer (70:30)
P-22) Methyl methacrylate-styrene copolymer (90:10)
P-23) Methyl methacrylate-ethyl acrylate copolymer (50:50)
P-24) n-butyl methacrylate-methyl methacrylate-styrene copolymer (50:20:30)
P-25) Vinyl acetate-acrylamide copolymer (85:15)
P-26) Vinyl chloride-vinyl acetate copolymer (65:35)
P-27) Methyl methacrylate-acrylonitrile copolymer (65:35)
P-28) n-butyl methacrylate-pentyl methacrylate-N-vinyl-2-pyrrolidone copolymer (38:38:24)
P-29) Methyl methacrylate-n-butyl methacrylate-isobutyl-methacrylate-acrylic acid copolymer (37: 29: 25: 9)
P-30) n-butyl methacrylate-acrylic acid (95: 5)

P-31) Methyl methacrylate-acrylic acid copolymer (95: 5)
P-32) Benzyl methacrylate-acrylic acid copolymer (93: 7)
P-33) n-butyl methacrylate-methyl methacrylate-benzyl methacrylate-acrylic acid copolymer (35: 35: 25: 5)
P-34) n-butyl methacrylate-methyl methacrylate-benzyl methacrylate copolymer (40:30:30)
P-35) Diacetone acrylamide-methyl methacrylate copolymer (50:50)
P-36) Methyl vinyl ketone-isobutyl methacrylate copolymer (55:45)
P-37) Ethyl methacrylate-n-butyl acrylate copolymer (70:30)
P-38) Diacetone acrylamide-n-butyl acrylate copolymer (60:40)
P-39) Methyl methacrylate-stearyl methacrylate-diacetone acrylamide copolymer (40:40:20)
P-40) n-butyl acrylate-stearyl methacrylate-diacetone acrylamide copolymer (70:20:10)

P-41) Stearyl methacrylate-methyl methacrylate-acrylic acid copolymer (50:40:10)
P-42) Methyl methacrylate-styrene-vinylsulfonamide copolymer (70:20:10)
P-43) Methyl methacrylate-phenyl vinyl ketone copolymer (70:30)
P-44) n-butyl acrylate-methyl methacrylate-n-butyl methacrylate copolymer (35:35:30)
P-45) n-butyl methacrylate-N-vinyl-2-pyrrolidone copolymer (90:10)
P-46) Polypentyl acrylate P-47) Cyclohexyl methacrylate-methyl methacrylate-n-propyl methacrylate copolymer (37:29:34)
P-48) Polypentyl methacrylate P-49) Methyl methacrylate-n-butyl methacrylate copolymer (65:35)
P-50) Vinyl acetate-vinyl propionate copolymer (75:25)

P-51) Sodium n-butyl methacrylate-3-acryloxybutane-1-sulfonate (97: 3)
P-52) n-butyl methacrylate-methyl methacrylate-acrylamide copolymer (35:35:30)
P-53) n-butyl methacrylate-methyl methacrylate-vinyl chloride copolymer (37:36:27)
P-54) n-butyl methacrylate-styrene copolymer (82:18)
P-55) tert-butyl methacrylate-methyl methacrylate copolymer (70:30)
P-56) Poly (N-tert-butylmethacrylamide)
P-57) N-tert-butylacrylamide-methylphenyl methacrylate copolymer (60:40)
P-58) Methyl methacrylate-acrylonitrile copolymer (70:30)
P-59) Methyl methacrylate-methyl vinyl ketone copolymer (28:72)
P-60) Methyl methacrylate-styrene copolymer (75:25)

P-61) Methyl methacrylate-hexyl methacrylate copolymer (70:30)
P-62) Butyl methacrylate-acrylic acid copolymer (85:15)
P-63) Methyl methacrylate-acrylic acid copolymer (80:20)
P-64) Methyl methacrylate-acrylic acid copolymer (98: 2)
P-65) Methyl methacrylate-N-vinyl-2-pyrrolidone copolymer (90:10)
P-66) n-butyl methacrylate-vinyl chloride copolymer (90:10)
P-67) n-butyl methacrylate-styrene copolymer (70:30)
P-68) 1,4-butanediol-adipic acid polyester P-69) ethylene glycol-sebacate polyester P-70) polycaprolactam

P-71) Polypropiolactam P-72) Polydimethylpropiolactone P-73) N-tert-butylacrylamide-dimethylaminoethylaramide copolymer (85:15)
P-74) N-tert-butylmethacrylamide-vinylpyridine copolymer (95: 5)
P-75) Diethyl maleenate-n-butyl acrylate copolymer (65:35)
P-76) N-tert-butylacrylamide-2-methoxyethyl acrylate copolymer (55:45)

  Another preferred embodiment of the polymer that can be preferably used in the present invention is a substantially water-insoluble polymer containing a monomer unit having at least one aromatic group as a constituent element. The average molecular weight is less than 2000. The number average molecular weight is preferably 200 or more and less than 2000, more preferably 200 or more and 1000 or less. The polymer used in the present invention may be a so-called homopolymer composed of one type of monomer, or may be a copolymer composed of two or more types of monomers. In the case of a copolymer, it is preferable that the monomer having an aromatic group according to the present invention is contained in an amount of 20% or more by weight. The structure of the polymer is not particularly limited as long as the above conditions are satisfied, but preferred structures include styrene, α-methylstyrene, β-methylstyrene, or monomers having substituents on these benzene rings as constituent elements. And polymers containing aromatic acrylamide, aromatic methacrylamide, aromatic acrylic acid ester, and aromatic methacrylic acid ester as constituent elements. Here, examples of the aromatic group include a phenyl group, a naphthyl group, a benzyl group, and a biphenyl group. These aromatic groups may be substituted with an alkyl group, a halogen atom or the like. In addition, as a comonomer in the case of a copolymer, for example, compounds described in JP-A-63-264748 can be preferably used. A polymer derived from styrene, α-methylstyrene or β-methylstyrene is preferred from the viewpoint of availability of raw materials and stability of the emulsion over time.

  In the present invention, among the general formulas (TS-I) to (TS-VII), metal complexes, ultraviolet absorbers, and water-insoluble homopolymers or copolymers, the general formulas (TS-I), ( TS-II), (TS-IV), (TS-V), (TS-VI), or a compound represented by (TS-VII), an ultraviolet absorber, or a water-insoluble homopolymer or copolymer The compound represented by the general formula (TS-I), (TS-II), (TS-V), (TS-VI), or (TS-VII), an ultraviolet absorber, or water is preferable. More preferably, it is an insoluble homopolymer or copolymer.

The compound represented by any one of the general formulas (TS-I) to (TS-VII) used in the present invention, or a metal complex, an ultraviolet absorber, a water-insoluble homopolymer or a copolymer is at least one kind. , Several types may be used in combination.
The addition amount of the compound represented by any one of the general formulas (TS-I) to (TS-VII), the metal complex, the ultraviolet absorber, and the water-insoluble homopolymer or copolymer is each a dyeable receiving polymer. The amount is preferably 1 to 20 parts by mass, more preferably 2 to 10 parts by mass with respect to 100 parts by mass.

  In addition to the compounds described above, the alkenylcarbonyl compound represented by the general formula (B) in the present invention may be used in combination with other compounds. These compounds that may be used in combination include boron compounds represented by general formula (I) described in JP-A-4-174430, general formula (II) described in US Pat. No. 5,183,731, or An epoxy compound represented by the general formula (S1) described in JP-A-8-53431, a general formula described in European Patent No. 271322B1, or a general formula (I) or (II) described in JP-A-4-19736 , (III), (IV), a disulfide compound represented by any one of the general formulas (I), (II), (III), (IV) described in US Pat. No. 5,242,785. Reactive compounds, cyclic phosphorus compounds represented by general formula (1) described in JP-A-8-283279, general formula (SO) described in JP-A-7-84350, 9-114061 General formula (G) described in JP-A-9-146242, general formula (II) described in JP-A-9-146242, general formula (A) described in JP-A-9-329876, or general formula described in JP-A-62-175748 An alcoholic compound represented by (VII) is mentioned. In addition, when the above publications include examples of compounds included in any of the general formulas (TS-I) to (TS-VII) used in the present invention, these are also exemplified as exemplary compounds included in the present invention. Can do.

An alkenylcarbonyl compound represented by the general formula (B), a compound represented by the general formula (Ph), a compound represented by any one of the general formulas (E-1) to (E-3), a general formula ( Additives such as compounds represented by any one of TS-I) to (TS-VII), metal complexes, ultraviolet absorbers, and / or water-insoluble homopolymers or copolymers can be sensitized by an ordinary dispersion method. Although it can be introduced into the material, an oil-in-water dispersion method in which it is dissolved in a high boiling point organic solvent (a low boiling point organic solvent can be used in combination), emulsified and dispersed in an aqueous gelatin solution and added to the silver halide emulsion is preferably used. The metal complex used in the present invention is preferably dispersed in a high boiling point organic solvent.
Examples of the high boiling point organic solvent used in the oil-in-water dispersion method are described in US Pat. No. 2,322,027. Specific examples of the latex dispersion method as one of the polymer dispersion methods include US Patent No. 4,199,363, West German Patent (OLS) No. 2,541,274, Japanese Patent Publication No. 53-41091, and European Patent Application Publication. Nos. 0,727,703A1 and 0,727,704A1 and the like. Further, a dispersion method using an organic solvent-soluble polymer is described in PCT International Publication WO 88/723 pamphlet. In addition, as a high boiling point organic solvent which can be used for the oil-in-water dispersion method mentioned above, a high boiling point organic solvent preferable as the image receiving function improving agent described above can also be used.

  Among the image receiving function improvers used in the present invention, alkenylcarbonyl compounds represented by general formula (B), compounds represented by general formula (Ph), and general formulas (E-1) to (E-3). Any one of the compounds represented by any one of the compounds represented by any one of formulas (TS-I) to (TS-VII) may be used in combination, and the general formula (E-1) A combination of the compound represented by any one of (E-3) and the alkenylcarbonyl compound represented by the general formula (B) is preferable.

<Polymer latex>
Further, the polymer latex will be described in detail.
In the heat-sensitive transfer image-receiving sheet of the present invention, the dyeable receiving polymer or UV absorber polymer used in the receiving layer is dispersed as a polymer latex, that is, a water-insoluble hydrophobic polymer is dispersed as fine particles in a water-soluble dispersion medium. Preferably. As the dispersion state, the polymer is emulsified in a dispersion medium, the emulsion is polymerized, the micelle is dispersed, or the polymer molecule has a partially hydrophilic structure and the molecular chain itself is molecularly dispersed. Anything may be used. For polymer latex, Tadashi Okuda, Hiroshi Inagaki, “Synthetic Resin Emulsion”, published by Kobunshi Publishing (1978), Takaaki Sugimura, Ikuo Kataoka, Junichi Suzuki, Keiji Kasahara, “Application of Synthetic Latex”, Takashi Published by Molecular Publications (1993), Soichi Muroi, “Synthetic Latex Chemistry”, published by High Polymers Publications (1970), supervised by Yoshiaki Mitsuzawa, “Development and Application of Aqueous Coating Materials”, CMC Publishing ( 2004) and JP-A-64-538. The average particle size of the dispersed particles is preferably 1 to 50000 nm, more preferably about 5 to 1000 nm. The particle size distribution of the dispersed particles is not particularly limited, and may have a wide particle size distribution or a monodispersed particle size distribution.

  The polymer latex may be a so-called core / shell type latex in addition to a normal uniform polymer latex. In this case, it may be preferable to change the glass transition temperature between the core and the shell. The glass transition temperature of the polymer latex is preferably −30 ° C. to 130 ° C., more preferably 0 ° C. to 100 ° C., and further preferably 10 ° C. to 80 ° C.

  Preferred embodiments of the polymer latex include hydrophobic polymers such as acrylic polymers, polyesters, rubbers (for example, SBR resin), polyurethanes, polyvinyl chlorides, polyvinyl acetates, polyvinylidene chlorides, polyolefins, and the like. Can be used. These polymers may be linear polymers, branched polymers, crosslinked polymers, so-called homopolymers obtained by polymerizing a single monomer, or copolymers obtained by polymerizing two or more types of monomers. In the case of a copolymer, it may be a random copolymer or a block copolymer. These polymers have a number average molecular weight of 5,000 to 1,000,000, preferably 10,000 to 500,000. If the molecular weight is too small, the mechanical strength of the layer containing the latex is insufficient, and if it is too large, the film formability is poor and this is not preferred. A crosslinkable polymer latex is also preferably used.

  The monomer used for the synthesis of the polymer latex used in the present invention is not particularly limited, and monomers that can be polymerized by a normal radical polymerization or ionic polymerization method are preferably the following monomer groups (a) to (j). Can be used. Polymer monomers can be synthesized by selecting these monomers independently and freely in combination.

(A) Conjugated dienes: 1,3-pentadiene, isoprene, 1-phenyl-1,3-butadiene, 1-α-naphthyl-1,3-butadiene, 1-β-naphthyl-1,3-butadiene, cyclo Pentadiene and the like.
(B) Olefins: ethylene, propylene, vinyl chloride, vinylidene chloride, 6-hydroxy-1-hexene, 4-pentenoic acid, methyl 8-nonenoate, vinylsulfonic acid, trimethylvinylsilane, trimethoxyvinylsilane, 1,4- Divinylcyclohexane, 1,2,5-trivinylcyclohexane, etc.

  (C) α, β-unsaturated carboxylic acid esters: alkyl acrylate (eg, methyl acrylate, ethyl acrylate, butyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, dodecyl acrylate, etc.), substituted alkyl acrylate (eg, 2-chloro Ethyl acrylate, benzyl acrylate, 2-cyanoethyl acrylate, etc.), alkyl methacrylate (eg, methyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, dodecyl methacrylate, etc.), substituted alkyl methacrylate (eg, 2-hydroxyethyl methacrylate, glycidyl methacrylate) Glycerin monomethacrylate, 2-acetoxyethyl methacrylate, tetrahydrofurfurylme Chryrate, 2-methoxyethyl methacrylate, polypropylene glycol monomethacrylate (polyoxypropylene added mole number = 2 to 100), 3-N, N-dimethylaminopropyl methacrylate, chloro-3-N, N, N-trimethyl Ammoniopropyl methacrylate, 2-carboxyethyl methacrylate, 3-sulfopropyl methacrylate, 4-oxysulfobutyl methacrylate, 3-trimethoxysilylpropyl methacrylate, allyl methacrylate, 2-isocyanatoethyl methacrylate, etc.), unsaturated dicarboxylic acid derivatives (Eg, monobutyl maleate, dimethyl maleate, monomethyl itaconate, dibutyl itaconate, etc.), polyfunctional esters (eg, ethylene glycol diacrylate) Ethylene glycol dimethacrylate, 1,4-cyclohexanediacrylate, pentaerythritol tetramethacrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, trimethylolethane triacrylate, dipentaerythritol pentamethacrylate, pentaerythritol hexaacrylate, 1,2, 4-cyclohexanetetramethacrylate and the like.

(D) Amides of α, β-unsaturated carboxylic acids: for example, acrylamide, methacrylamide, N-methylacrylamide, N, N-dimethylacrylamide, N-methyl-N-hydroxyethylmethacrylamide, N-tertbutylacrylamide, N-tert octyl methacrylamide, N-cyclohexyl acrylamide, N-phenyl acrylamide, N- (2-acetoacetoxyethyl) acrylamide, N-acryloylmorpholine, diacetone acrylamide, itaconic acid diamide, N-methylmaleimide, 2-acrylamide -Methylpropanesulfonic acid, methylenebisacrylamide, dimethacryloylpiperazine and the like .

  Polymer latex is also commercially available, and the following polymers can be used. Examples of acrylic polymers include Sebian A-4635, 4718, 4601 manufactured by Daicel Chemical Industries, Ltd., Nipol Lx811, 814, 821, 820, 855 manufactured by Nippon Zeon Co., Ltd. (P-17: Tg 36 ° C.). 857 × 2 (P-18: Tg 43 ° C.), Voncoat R3370 (P-19: Tg 25 ° C.), 4280 (P-20: Tg 15 ° C.), manufactured by Dainippon Ink & Chemicals, Jurimer manufactured by Nippon Pure Chemical Co., Ltd. ET-410 (P-21: Tg 44 ° C.), AE116 (P-22: Tg 50 ° C.), AE119 (P-23: Tg 55 ° C.), AE121 (P-24: Tg 58 ° C.), AE125 (P -25: Tg 60 ° C), AE134 (P-26: Tg48 ° C), AE137 (P-27: Tg48 ° C), AE140 (P-28: T) g53 ° C.), AE173 (P-29: Tg 60 ° C.), Toagosei Co., Ltd. Aron A-104 (P-30: Tg 45 ° C.), Takamatsu Yushi Co., Ltd. NS-600X, NS-620X, Japan Examples include Vinibrand 2580, 2583, 2641, 2770, 2770H, 2635, 2886, 5202C, and 2706 manufactured by Shin Chemical Co., Ltd. (all are trade names).

  Examples of the polyesters include: FINETEX ES650, 611, 675, and 850 manufactured by Dainippon Ink Chemical Co., Ltd., WD-size and WMS manufactured by Eastman Chemical Co., Ltd., A-110 and A-115GE manufactured by Takamatsu Yushi A-120, A-121, A-124GP, A-124S, A-160P, A-210, A-215GE, A-510, A-513E, A-515GE, A-520, A-610, A -613, A-615GE, A-620, WAC-10, WAC-15, WAC-17XC, WAC-20, S-110, S-110EA, S-111SL, S-120, S-140, S-140A , S-250, S-252G, S-250S, S-320, S-680, DNS-63P, NS-122L, NS-122LX, NS-2 4LX, NS-140L, NS-141LX, NS-282LX, Aronmelt PES-1000 series, PES-2000 series manufactured by Toagosei Co., Ltd., Baironal MD-1100, MD-1200, MD-1220 manufactured by Toyobo , MD-1245, MD-1250, MD-1335, MD-1400, MD-1480, MD-1500, MD-1930, MD-1985, Sephorjon ES manufactured by Sumitomo Seika Co., Ltd. Product name).

  Examples of polyurethanes include HYDRAN AP10, AP20, AP30, AP40, 101H, Vonic 1320NS, 1610NS, manufactured by Dainippon Ink and Chemicals, Inc., D-1000, D-2000, D- 6000, D-4000, D-9000, Takamatsu Yushi Co., Ltd. NS-155X, NS-310A, NS-310X, NS-311X, Daiichi Kogyo Seiyaku Co., Ltd. Product name).

  Examples of rubbers are LACSTAR 7310K, 3307B, 4700H, 7132C (manufactured by Dainippon Ink and Chemicals, Inc.), Nipol Lx416, LX410, LX430, LX435, LX110, LX415A, LX438C, 2507H, LX303A, LX407BP series , V1004, MH5055 (manufactured by Nippon Zeon Co., Ltd.), etc. (all are trade names).

  Examples of polyvinyl chlorides include G351 and G576 manufactured by Nippon Zeon Co., Ltd., and Vinibrand 240, 270, 277, 375, manufactured by Nissin Chemical Industry Co., Ltd., 386, 609, 550, 601, 602, 630, and 660. 671, 683, 680, 680S, 681N, 685R, 277, 380, 381, 410, 430, 432, 860, 863, 865, 867, 900, 900GT, 938, 950, etc. (all are trade names). . Examples of polyvinylidene chlorides include L502 and L513 manufactured by Asahi Kasei Kogyo Co., Ltd., D-5071 manufactured by Dainippon Ink and Chemicals, Inc. (all are trade names). Examples of polyolefins include Chemipearl S120, SA100, V300 (P-40: Tg 80 ° C.) manufactured by Mitsui Petrochemical Co., Ltd., Voncoat 2830, 2210, 2960 manufactured by Dainippon Ink and Chemicals, Sumitomo Seika ( Examples of Saixen, Sepoljon G, and copolymer nylons manufactured by Sumitomo Seika Co., Ltd. include Sepoljon PA manufactured by Sumitomo Seika Co., Ltd. (all are trade names).

  Examples of the polyvinyl acetates include Vinibrand 1080, 1082, 1085W, 1108W, 1108S, 1563S, 1563M, 1566, 1570, 1588C, A22J7-F2, 1128C, 1137, 1138, A20J2, A23J1 manufactured by Nissin Chemical Industry Co., Ltd. , A23J1, A23K1, A23P2E, A68J1N, 1086A, 1086, 1086D, 1108S, 1187, 1241LT, 1580N, 1083, 1571, 1572, 1581, 4465, 4466, 4468W, 4468S, 4470, 4485LL, 4423, 1060 1060S, 1080M, 1084W, 1084S, 1096, 1570K, 1050, 1050S, 3290, 1017AD, 1002, 1006, 1008 1107L, 1225,1245L, GV-6170, GV-6181,4468W, such as 4468S, and the like (all trade names).

  These polymer latexes may be used alone or in combination of two or more as required.

  In the heat-sensitive transfer image-receiving sheet of the present invention, the receptor layer is preferably prepared by applying an aqueous coating solution and then drying. However, “aqueous” as used herein means that 60% by mass or more of the solvent (dispersion medium) of the coating solution is water. Components other than water in the coating solution include methyl alcohol, ethyl alcohol, isopropyl alcohol, methyl cellosolve, ethyl cellosolve, dimethylformamide, ethyl acetate, diacetone alcohol, furfuryl alcohol, benzyl alcohol, diethylene glycol monoethyl ether, oxyethyl phenyl ether A water miscible organic solvent such as can be used.

The minimum film-forming temperature (MFT) of the polymer latex is preferably −30 ° C. to 90 ° C., more preferably about 0 ° C. to 70 ° C. A film-forming auxiliary may be added to control the minimum film-forming temperature. A film-forming aid, also called a temporary plasticizer, is an organic compound (usually an organic solvent) that lowers the minimum film-forming temperature of polymer latex. For example, Soichi Muroi, “Synthetic Latex Chemistry”, published by Kobunshi Publishing Co. )It is described in. Preferred film-forming aids are the following compounds, but the compounds that can be used in the present invention are not limited to the following specific examples.
Z-1: benzyl alcohol Z-2: 2,2,4-trimethylpentanediol-1,3-monoisobutyrate Z-3: 2-dimethylaminoethanol Z-4: diethylene glycol

  Preferable examples of the polymer latex include polylactic acid ester compounds, polyurethane compounds, polycarbonate compounds, polyester compounds, polyacetal compounds, SBR compounds, and polyvinyl chloride compounds. Among these, polyester compounds, polycarbonate compounds, and polyvinyl chloride compounds. It is preferable to include a compound.

  Any polymer may be used in combination with the polymer latex. The polymer that can be used in combination is preferably transparent or translucent and colorless. Natural resins, polymers and copolymers, synthetic resins, polymers and copolymers, and other media for forming films such as gelatins and polyvinyl alcohol Compound, hydroxyethyl cellulose compound, cellulose acetate compound, cellulose acetate butyrate compound, polyvinylpyrrolidone compound, casein, starch, polyacrylic acid compound, polymethylmethacrylic acid compound, polyvinyl chloride compound, polymethacrylic acid compound, styrene-maleic anhydride Copolymer compound, styrene-acrylonitrile copolymer compound, styrene-butadiene copolymer compound, polyvinyl acetal compound (for example, polyvinyl formal and polyvinyl butyrate) Lumpur), polyester compound, polyurethane compound, a phenoxy resin, polyvinylidene chloride compounds, polyepoxide compounds, polycarbonate compounds, polyvinyl acetate compounds, polyolefin compounds, polyamide compounds. The binder may be coated from water or an organic solvent or emulsion.

  In the heat-sensitive transfer image-receiving sheet of the present invention, a binder may be used for the receiving layer, and the binder has a glass transition temperature (Tg) in the range of -30 ° C to 70 ° C in terms of processing brittleness and image storage stability. More preferably, it is in the range of −10 ° C. to 50 ° C., particularly preferably in the range of 0 ° C. to 40 ° C. It is also possible to use a blend of two or more polymers as the binder, and in this case, it is preferable that the weighted average Tg in consideration of the composition falls within the above range. Moreover, when phase-separating or having a core-shell structure, the weighted average Tg is preferably within the above range.

This glass transition temperature (Tg) can be calculated by the following formula.
1 / Tg = Σ (Xi / Tgi)
Here, it is assumed that n monomer components from i = 1 to n are copolymerized in the polymer. Xi is the weight fraction of the i-th monomer (ΣXi = 1), and Tgi is the glass transition temperature (absolute temperature) of the homopolymer of the i-th monomer. However, Σ is the sum from i = 1 to n. The homopolymer glass transition temperature value (Tgi) of each monomer may be the value of “Polymer Handbook (3rd Edition)” (by J. Brandrup, EH Immergut (Wiley-Interscience, 1989)).

  The polymer used for the binder can be easily obtained by a solution polymerization method, a suspension polymerization method, an emulsion polymerization method, a dispersion polymerization method, an anionic polymerization method, a cationic polymerization or the like, but an emulsion polymerization method obtained as a latex is preferred. Also preferred is a method of preparing a polymer in a solution and neutralizing or adding an emulsifier and then adding water and forcibly stirring to prepare an aqueous dispersion. In the emulsion polymerization method, for example, water or a mixed solvent of water and an organic solvent miscible with water (for example, methanol, ethanol, acetone, etc.) is used as a dispersion medium, and the monomer is 5 to 150% by mass with respect to the dispersion medium. Using the mixture and the total amount of monomers, an emulsifier and a polymerization initiator are used, and polymerization is carried out with stirring at about 30 to 100 ° C., preferably 60 to 90 ° C. for 3 to 24 hours. Various conditions such as the dispersion medium, the monomer concentration, the initiator amount, the emulsifier amount, the dispersant amount, the reaction temperature, and the monomer addition method are appropriately set in consideration of the type of monomer used. Moreover, it is preferable to use a dispersing agent as needed.

  The emulsion polymerization method can be generally performed according to the following literature. Tadashi Okuda, Hiroshi Inagaki, “Synthetic Resin Emulsion”, published by Polymer Publishing Association (1978), Takaaki Sugimura, Akio Kataoka, Junichi Suzuki, Keiji Kasahara, “Application of Synthetic Latex”, Published by Polymer Publishing Society (1993) 1), Soichi Muroi, “Chemistry of Synthetic Latex”, published by Kobunshi Shuppankai (1970). In the emulsion polymerization method for synthesizing the polymer latex used in the present invention, a batch polymerization method, a monomer (continuous / divided) addition method, an emulsion addition method, a seed polymerization method, etc. can be selected from the viewpoint of latex productivity. A batch polymerization method, a monomer (continuous / divided) addition method, and an emulsion addition method are preferred.

  The polymerization initiator only needs to have radical generating ability, such as inorganic peroxides such as persulfate and hydrogen peroxide, peroxides described in the organic peroxide catalog manufactured by NOF Corporation, and Wako Pure. The azo compounds described in the azo polymerization initiator catalog manufactured by Yakuhin Co., Ltd. can be used. Among them, water-soluble peroxides such as persulfate and water-soluble azo compounds described in Wako Pure Chemical Industries, Ltd. azo polymerization initiator catalog are preferable, such as ammonium persulfate, sodium persulfate, potassium persulfate, Azobis (2-methylpropionamidine) hydrochloride, azobis (2-methyl-N- (2-hydroxyethyl) propionamide), azobiscyanovaleric acid is more preferable, and in particular, ammonium persulfate, sodium persulfate, potassium persulfate, etc. Peroxides are preferred from the viewpoints of image storability, solubility, and cost.

  As the addition amount of the polymerization initiator, the polymerization initiator is preferably 0.3% by mass to 2.0% by mass, and 0.4% by mass to 1.75% by mass with respect to the total amount of monomers. Is more preferable, and 0.5% by mass to 1.5% by mass is particularly preferable.

  As the polymerization emulsifier, any of an anionic surfactant, a nonionic surfactant, a cationic surfactant, and an amphoteric surfactant can be used, but the anionic surfactant has dispersibility and image storability. From the viewpoint, it is preferable to use a sulfonic acid type anionic surfactant because the polymerization stability can be ensured in a small amount and it has hydrolysis resistance, and a long chain alkyl represented by Perex SS-H (manufactured by Kao Corporation). Diphenyl ether disulfonate is more preferable, and a low electrolyte type such as Pionein A-43-S (manufactured by Takemoto Yushi Co., Ltd.) is particularly preferable.

  As the polymerization emulsifier, a sulfonic acid type anionic surfactant is preferably used in an amount of 0.1% by mass to 10.0% by mass with respect to the total amount of monomers, and 0.2% by mass to 7.5% by mass is used. It is more preferable that 0.3% by mass to 5.0% by mass is used.

  A chelating agent is preferably used for the synthesis of the polymer latex. A chelating agent is a compound capable of coordinating (chelating) multivalent ions such as metal ions such as iron ions and alkaline earth metal ions such as calcium ions. Japanese Patent Publication No. 6-8956, US Pat. JP-A-73645, JP-A-4-127145, JP-A-4-247703, JP-A-4-305572, JP-A-6-11805, JP-A-5-173712, JP-A-5-66527, JP-A-5-66527. 158195, JP-A-6-118580, JP-A-6-110168, JP-A-6-161054, JP-A-6-175299, JP-A-6-214352, JP-A-7-114161, JP-A-7-114154 JP-A-7-120894, JP-A-7-199433, JP-A-7-306504, JP-A-9-43792 , JP-A-8-314090, JP-A-10-182571, JP-A-10-182570, can be employed compounds described in JP-A-11-190892.

  Examples of the chelating agent include inorganic chelate compounds (sodium tripolyphosphate, sodium hexametaphosphate, sodium tetrapolyphosphate, etc.), aminopolycarboxylic acid chelate compounds (nitrilotritriacetic acid, ethylenediaminetetraacetic acid, etc.), organic phosphonic acid chelate compounds ( Research Disclosure 18170, JP-A-52-102726, 53-42730, 56-97347, 54-121127, 55-4024, 55-4025, 55-29883, 55 -126241, 55-65955, 55-65956, 57-17943, 54-61125, and West German Patent No. 1045373), polyphenol-based chelating agents, polyamine-based chelates Preferably such DOO compounds, with aminopolycarboxylic acid derivatives being particularly preferred.

  Preferable examples of the aminopolycarboxylic acid derivatives include the compounds listed in the appendix of “EDTA (-Complexane Chemistry)” (Nanedo, 1977), and some of the carboxyl groups of these compounds are sodium or potassium. Alkali metal salts and ammonium salts such as may be substituted. Particularly preferred aminocarboxylic acid derivatives include iminodiacetic acid, N-methyliminodiacetic acid, N- (2-aminoethyl) iminodiacetic acid, N- (carbamoylmethyl) iminodiacetic acid, nitrilotriacetic acid, ethylenediamine-N, N '-Diacetic acid, ethylenediamine-N, N'-di-α-propionic acid, ethylenediamine-N, N'-di-β-propionic acid, N, N'-ethylene-bis (α-o-hydroxyphenyl) glycine N, N′-di (2-hydroxybenzyl) ethylenediamine-N, N′-diacetic acid, ethylenediamine-N, N′-diacetic acid-N, N′-diacethydroxamic acid, N-hydroxyethylethylenediamine-N , N ′, N′-triacetic acid, ethylenediamine-N, N, N ′, N′-tetraacetic acid, 1,2-propylenediamine-N, N, N ′ N′-tetraacetic acid, d, l-2,3-diaminobutane-N, N, N ′, N′-tetraacetic acid, meso-2,3-diaminobutane-N, N, N ′, N′-four Acetic acid, 1-phenylethylenediamine-N, N, N ′, N′-tetraacetic acid, d, l-1,2-diphenylethylenediamine-N, N, N ′, N′-tetraacetic acid, 1,4-diaminobutane -N, N, N ', N'-tetraacetic acid, trans-cyclobutane-1,2-diamine-N, N, N', N'-tetraacetic acid, trans-cyclopentane-1,2-diamine-N, N, N ′, N′-tetraacetic acid, trans-cyclohexane-1,2-diamine-N, N, N ′, N′-tetraacetic acid, cis-cyclohexane-1,2-diamine-N, N, N ′ , N′-tetraacetic acid, cyclohexane-1,3-diamine-N, N, N ′, N′-four Acid, cyclohexane-1,4-diamine-N, N, N ′, N′-tetraacetic acid, o-phenylenediamine-N, N, N ′, N′-tetraacetic acid, cis-1,4-diaminobutene- N, N, N ′, N′-tetraacetic acid, trans-1,4-diaminobutene-N, N, N ′, N′-tetraacetic acid, α, α′-diamino-o-xylene-N, N, N ′, N′-tetraacetic acid, 2-hydroxy-1,3-propanediamine-N, N, N ′, N′-tetraacetic acid, 2,2′-oxy-bis (ethyliminodiacetic acid), 2,2 '-Ethylenedioxy-bis (ethyliminodiacetic acid), ethylenediamine-N, N'-diacetic acid-N, N'-di-α-propionic acid, ethylenediamine-N, N'-diacetic acid-N, N'- Di-β-propionic acid, ethylenediamine-N, N, N ′, N′-tetrapropionic acid Diethylenetriamine-N, N, N ′, N ″, N ″ -pentaacetic acid, triethylenetetramine-N, N, N ′, N ″, N ′ ″, N ′ ″-hexaacetic acid, 1, 2,3-triaminopropane-N, N, N ′, N ″, N ′ ″, N ′ ″-hexaacetic acid, and some of the carboxyl groups of these compounds include sodium and potassium. Substituted ones such as alkali metal salts and ammonium salts can also be mentioned.

  The addition amount of the chelating agent is preferably 0.01% by mass to 0.4% by mass, more preferably 0.02% by mass to 0.3% by mass with respect to the total amount of monomers. It is especially preferable that it is 03 mass%-0.15 mass%. When the amount of the chelating agent is less than 0.01% by mass, capture of metal ions mixed in the production process of the polymer latex becomes insufficient, stability against aggregation of the latex is lowered, and applicability is deteriorated. On the other hand, if it exceeds 0.4%, the viscosity of the latex increases and the coatability is lowered.

  A chain transfer agent is preferably used for the synthesis of the polymer latex. As the chain transfer agent, those described in “Polymer Handbook, 3rd edition” (Wiley-Interscience, 1989) are preferable. Sulfur compounds are more preferred because they have high chain transfer ability and can be used in small amounts. Hydrophobic mercaptan-based chain transfer agents such as tert-dodecyl mercaptan and n-dodecyl mercaptan are particularly preferred.

  The amount of the chain transfer agent is preferably 0.2% by mass to 2.0% by mass, more preferably 0.3% by mass to 1.8% by mass, and 0.4% by mass to 1.6% by mass with respect to the total amount of monomers. Mass% is particularly preferred.

  In emulsion polymerization, in addition to the above compounds, electrolytes, stabilizers, thickeners, antifoaming agents, antioxidants, vulcanizing agents, antifreezing agents, gelling agents, vulcanization accelerators, etc. are described in synthetic rubber handbooks, etc. These additives may be used.

  As the polymer latex, an aqueous solvent can be used as a solvent in the coating solution, but a water-miscible organic solvent may be used in combination. Examples of the water-miscible organic solvent include alcohols such as methyl alcohol, ethyl alcohol and propyl alcohol, cellosolves such as methyl cellosolve, ethyl cellosolve and butyl cellosolve, ethyl acetate and dimethylformamide. The amount of these organic solvents added is preferably 50% or less, more preferably 30% or less of the solvent.

  The polymer latex preferably has a polymer concentration of 10 to 70% by mass, more preferably 20 to 60% by mass, and particularly preferably 30 to 55% by mass with respect to the latex liquid. The addition amount of the polymer latex is preferably 50 to 95% by mass, more preferably 70 to 90% by mass, based on the total polymer content in the receptor layer. In addition, the polymer latex in the image receiving sheet of the present invention includes a gel or a dried film state formed by drying a part of the solvent after coating.

<Release agent>
In addition, a release agent may be added to the receiving layer in order to prevent thermal fusion with the thermal transfer sheet during image formation. As the release agent, silicone oil and phosphoric ester plasticizer fluorine compound can be used, and silicone oil is particularly preferably used. As the silicone oil, modified silicone oils such as epoxy modification, alkyl modification, amino modification, carboxyl modification, alcohol modification, fluorine modification, alkylaralkyl polyether modification, epoxy / polyether modification, and polyether modification are preferably used. The reaction product of vinyl modified silicone oil and hydrogen modified silicone oil is good. The addition amount of the release agent is preferably 0.2 to 30 parts by mass with respect to the receiving polymer.
The coating amount of the receiving layer, 0.5 to 10 g / ^{m 2} is preferred.

(Underlayer)
A base layer is preferably formed between the receptor layer and the support. For example, a white background adjustment layer, a charge adjustment layer, an adhesive layer, and a primer layer are formed. These layers can be formed in the same manner as described in, for example, Japanese Patent No. 3585599 and Japanese Patent No. 2925244.

(Insulation layer)
The heat insulating layer (foamed layer) plays a role of protecting the support from heat during heat transfer using a thermal head. Moreover, since it has high cushioning properties, a thermal transfer image-receiving sheet with high printing sensitivity can be obtained even when paper is used as the substrate.
The heat insulating layer is formed from a resin and a foaming agent. As the resin for the heat insulating layer, a known resin such as urethane resin, acrylic resin, methacrylic resin, modified olefin resin, or a blend thereof can be used. A heat insulating layer is formed by coating a resin obtained by dissolving and / or dispersing these resins in an organic solvent or water. The heat insulating layer coating liquid is an aqueous coating liquid that does not affect the foaming agent. For example, water-soluble, water-dispersible, or SBR latex, urethane emulsion, polyester emulsion, emulsion of vinyl acetate and its copolymer, emulsion of acrylic copolymer such as acrylic and acrylic styrene, vinyl chloride Emulsions such as emulsions, or dispersions thereof can be used. However, in the case where microspheres described later are used as the foaming agent, an emulsion of vinyl acetate and its copolymer, acrylic and Emulsion of acrylic copolymer such as acrylic styrene It is preferable to use.

  Since these resins can easily control the glass transition point, flexibility, and film-forming property by changing the type of monomer to be copolymerized and their blending ratio, plasticizers and film-forming aids are added. Even if it is not, it is suitable in that the desired physical properties can be obtained, the color change is small during storage in various environments after film formation, and the physical properties change little over time. Of the above-mentioned resins, SBR latex is not preferred because it generally has a low glass transition point and is likely to cause blocking, and yellowing is likely to occur after film formation or during storage. Many urethane-based emulsions contain solvents such as NMP and DMF, and are not preferable because they easily affect the foaming agent. Polyester emulsions, dispersions, and vinyl chloride emulsions are generally not preferred because of their high glass transition points and poor microsphere foaming properties. Although some of them are soft, they are preferably not used because they are given flexibility by adding a plasticizer.

  The foaming performance of the foaming agent is greatly influenced by the hardness of the resin. In order for the foaming agent to expand to a desirable expansion ratio, a glass transition point of −30 to 20 ° C. or a film forming temperature of 20 ° C. or lower is desirable. When the glass transition point is 20 ° C. or higher, the flexibility is insufficient and the foaming performance of the foaming agent is reduced. In addition, those having a glass transition point of −30 ° C. or lower may cause blocking (generated at the foam layer and the back surface of the base material when the base material after the foam layer is wound) or thermal transfer. When the image receiving sheet is cut, a defect (such as when the image receiving sheet is cut, the resin of the foam layer is stuck to the blade of the cutter, the appearance is deteriorated, and the size of the cutting is confounded). Sometimes. Moreover, when the minimum film-forming temperature is 20 ° C. or higher, film-forming defects occur during coating and drying, and defects such as surface cracks occur.

  Defoaming agents such as dinitropentamethylenetetramene, diazoaminobenzene, azobisisobutyronitrile, azodicarboxamide, etc. that decompose when heated to generate gases such as oxygen, carbon dioxide, and nitrogen Examples thereof include known foaming agents such as microspheres in which a low boiling point liquid such as butane or pentane is covered with a resin such as polyvinylidene chloride or polyacrylonitrile to form microcapsules. Among these, microspheres in which a low-boiling liquid such as butane and pentane is covered with a resin such as polyvinylidene chloride and polyacrylonitrile to form microcapsules are preferably used. These foaming agents are foamed by heating after forming the foamed layer, and have high cushioning properties and heat insulation properties after foaming. The amount of the foaming agent used is preferably in the range of 0.5 to 100 parts by mass per 100 parts by mass of the resin forming the foamed layer. If it is 0.5 parts by mass or less, the cushioning property of the foam layer is low, and the effect of forming the foam layer cannot be obtained. If it is 100 parts by mass or more, the hollow ratio after foaming becomes too large, the mechanical strength of the foamed layer is lowered, and it becomes impossible to withstand normal handling. In addition, the foam layer surface loses smoothness and adversely affects the appearance and print quality. The total thickness of the foam layer is preferably 30 to 100 μm. When it is 30 μm or less, cushioning properties and heat insulation are insufficient, and when it is 100 μm or more, the effect of the foamed layer is not improved and the strength is lowered. Moreover, as a particle size of a foaming agent, that whose volume average particle diameter before foaming is about 5-15 micrometers and whose particle diameter after foaming is 20-50 micrometers is preferable. When the volume average particle size before foaming is 5 μm or less and the particle size after foaming is 20 μm or less, the cushion effect is low, the volume average particle size before foaming is 15 μm or more, and the particle size after foaming is 20 to 50 μm or more. In this case, the surface of the foam layer is made uneven, which adversely affects the image quality of the formed image.

  Particularly preferred among the foaming agents are low-temperature foaming type microspheres having a partition wall softening temperature and foaming start temperature of 100 ° C. or lower and an optimal foaming temperature (the temperature at which the foaming ratio becomes the highest with a heating time of 1 minute) of 140 ° C. or lower. It is preferable that the heating conditions during foaming be as low as possible. By using microspheres having a low foaming temperature, thermal wrinkles and curling of the base material during foaming can be prevented. The microsphere having a low foaming temperature can be obtained by adjusting the blending amount of a thermoplastic resin such as polyvinylidene chloride or polyacrylonitrile that forms the partition walls. The volume average particle size is 5 to 15 μm. The foam layer using this microsphere is such that the bubbles obtained by foaming are closed cells, foamed by a simple process of heating alone, the thickness of the foam layer can be easily controlled by the amount of microspheres, etc. There are advantages.

  However, this microsphere is weak against an organic solvent, and when a coating solution using an organic solvent is used as the foam layer, the partition walls of the microsphere are eroded and the foamability is lowered. Therefore, when microspheres such as those described above are used, organic solvents that attack the partition walls, for example, ketones such as acetone and methyl ethyl ketone, ester solvents such as ethyl acetate, and organic solvents such as lower alcohols such as methanol and ethanol It is better to use a water-based coating solution that does not contain water. Accordingly, an aqueous coating solution, specifically, a resin using a water-soluble or water-dispersible resin, or a resin emulsion, preferably an acrylic styrene emulsion or a modified vinyl acetate emulsion may be used. In addition, even if the foamed layer is formed with an aqueous coating solution, the addition of high-boiling and highly polar solvents such as NMP, DMF, and cellosolve as co-solvents, film-forming aids, and plasticizers will affect the microspheres. Therefore, it is necessary to pay attention to the composition of the aqueous resin to be used, the amount of the high-boiling solvent added, and to confirm whether the microcapsules are adversely affected.

(Support)
As the support, coated paper, WP paper (double-sided laminated paper), or the like can be used.

<Coated paper>
The coated paper is a paper obtained by coating various sheets of resin, rubber latex, or polymer material on one side or both sides of a sheet such as a base paper, and the coating amount varies depending on the application. Examples of such coated paper include art paper, cast coated paper, Yankee paper, and the like.

  As the resin applied to the surface of the base paper or the like, it is appropriate to use a thermoplastic resin. Examples of such a thermoplastic resin include the following thermoplastic resins (a) to (h).

(A) Polyolefin resins such as polyethylene resins and polypropylene resins, copolymer resins of olefins such as ethylene and propylene and other vinyl monomers, acrylic resins, and the like.
(B) A thermoplastic resin having an ester bond. For example, a dicarboxylic acid component (these dicarboxylic acid components may be substituted with a sulfonic acid group, a carboxyl group, etc.) and an alcohol component (these alcohol components may be substituted with a hydroxyl group, etc.) Polyester resin, polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polybutyl acrylate and other polyacrylic acid ester resins or polymethacrylic acid ester resins, polycarbonate resins, polyvinyl acetate resins, styrene acrylate resins, styrene -Methacrylic acid ester copolymer resin, vinyl toluene acrylate resin, etc. are mentioned.
Specific examples include those described in JP-A Nos. 59-101395, 63-7971, 63-7972, 63-7773, and 60-294862. it can.
Commercially available products include Byron 290, Byron 200, Byron 280, Byron 300, Byron 103, Byron GK-140, Byron GK-130 manufactured by Toyobo; Kao-made Tufton NE-382, Tufton U-5, ATR- 2009, ATR-2010; Unitika's Elitel UE3500, UE3210, XA-8153, KZA-7049, KZA-1449; Nippon Synthetic Chemical Polyester TP-220, R-188; And various thermoplastic resins (all are trade names).

(C) Polyurethane resin etc. are mentioned.
(D) Polyamide resin, urea resin, etc. are mentioned.
(E) Polysulfone resin and the like.
(F) Polyvinyl chloride resin, polyvinylidene chloride resin, vinyl chloride-vinyl acetate copolymer resin, vinyl chloride-vinyl propionate copolymer resin, and the like.
(G) Cellulose resins such as polyol resins, ethyl cellulose resins, and cellulose acetate resins, such as polyvinyl butyral.
(H) Polycaprolactone resin, styrene-maleic anhydride resin, polyacrylonitrile resin, polyether resin, epoxy resin, phenol resin and the like.
In addition, the said thermoplastic resin may be used individually by 1 type, and may use 2 or more types together.

  The thermoplastic resin may contain a brightening agent, a conductive agent, a filler, a pigment such as titanium oxide, ultramarine blue, and carbon black, a dye, and the like as necessary.

<Laminated paper>
The laminated paper is a paper obtained by laminating various resins, rubber or polymer sheets or films on a sheet such as a base paper. Examples of the laminate material include polyolefin, polyvinyl chloride, polyethylene terephthalate, polystyrene, polymethacrylate, polycarbonate, polyimide, triacetyl cellulose, and the like. These resins may be used alone or in combination of two or more.

  In general, the polyolefin is often formed using low density polyethylene, but in order to improve the heat resistance of the support, polypropylene, a blend of polypropylene and polyethylene, high density polyethylene, high density polyethylene and low density polyethylene, It is preferable to use a blend of In particular, it is most preferable to use a blend of high-density polyethylene and low-density polyethylene from the viewpoint of cost, suitability for lamination, and the like.

The blend of the high density polyethylene and the low density polyethylene is used, for example, in a blend ratio (mass ratio) of 1/9 to 9/1. The blend ratio is preferably 2/8 to 8/2, and more preferably 3/7 to 7/3. When forming a thermoplastic resin layer on both surfaces of the support, the back surface of the support is preferably formed using, for example, high-density polyethylene or a blend of high-density polyethylene and low-density polyethylene. The molecular weight of polyethylene is not particularly limited, but the melt index is 1.0 to 40 g / 10 min for both high-density polyethylene and low-density polyethylene and has extrudability. preferable.
In addition, you may perform the process which gives white reflectivity to these sheets or films. Examples of such a treatment method include a method of blending a pigment such as titanium oxide in these sheets or films.

  The thickness of the support is preferably 25 μm to 300 μm, more preferably 50 μm to 260 μm, and still more preferably 75 μm to 220 μm. Various stiffnesses can be used according to the purpose, and the support for a photographic image receiving sheet for electrophotography is close to a support for color silver halide photography. Those are preferred.

(Curl adjustment layer)
If the support is exposed as it is, the heat-sensitive transfer image-receiving sheet may be curled due to the humidity and temperature in the environment. Therefore, it is preferable to form a curl adjusting layer on the back side of the support. The curl adjusting layer not only prevents the image receiving sheet from curling but also serves as a waterproof. For the curl adjusting layer, polyethylene laminate, polypropylene laminate, or the like is used. Specifically, it can be formed in the same manner as described in, for example, JP-A-61-110135 and JP-A-6-202295.

(Writing layer / Charge adjustment layer)
An inorganic oxide colloid, an ionic polymer, or the like can be used for the writing layer and the charge adjusting layer. As the antistatic agent, for example, a cationic antistatic agent such as a quaternary ammonium salt or a polyamine derivative, an anionic antistatic agent such as an alkyl phosphate, or a nonionic antistatic agent such as a fatty acid ester can be used. . Specifically, it can be formed in the same manner as that described in, for example, Japanese Patent No. 3585585.

The thermal transfer sheet (ink sheet) used in combination with the above-described thermal transfer image-receiving sheet of the present invention at the time of thermal transfer image formation is provided with a pigment layer containing a diffusion transfer dye on a support. Ink sheets can be used. As the means for applying thermal energy at the time of thermal transfer, any conventionally known means for applying can be used. For example, recording is performed by a recording device such as a thermal printer (for example, product name, video printer VY-100, manufactured by Hitachi, Ltd.). By controlling the time, the intended purpose can be sufficiently achieved by applying thermal energy of about 5 to 100 mJ / mm ² .
The heat-sensitive transfer image-receiving sheet of the present invention can be applied to various uses such as a sheet- or roll-shaped heat-sensitive transfer image-receiving sheet, cards, and transmission-type manuscript preparation sheets capable of thermal transfer recording by appropriately selecting a support. You can also

  EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited by these.

<Reference example>
(Preparation of ink sheet)
A polyester film having a thickness of 6.0 μm (Lumirror, trade name, manufactured by Toray Industries, Inc.) was used as a base film. A heat resistant slip layer (thickness 1 μm) was formed on the back side of the film, and yellow, magenta and cyan compositions having the following compositions were applied to the surface side in a single color (coating amount 1 g / m ² during dry film formation).
Yellow Ink Dye (Macrolex Yellow 6G, trade name, manufactured by Bayer) 5.5 parts by weight Polyvinyl butyral resin 4.5 parts by weight (ESREC BX-1, trade name, manufactured by Sekisui Chemical Co., Ltd.)
Methyl ethyl ketone / toluene (mass ratio 1/1) 90 parts by mass Magenta Magenta dye 5.5 parts by mass (Disperse Red 60)
Polyvinyl butyral resin 4.5 parts by mass (ESREC BX-1, trade name, manufactured by Sekisui Chemical Co., Ltd.)
Methyl ethyl ketone / toluene (mass ratio 1/1) 90 parts by mass Cyan Cyan dye 5.5 parts by mass (solvent blue 63)
Polyvinyl butyral resin 4.5 parts by mass (ESREC BX-1, trade name, manufactured by Sekisui Chemical Co., Ltd.)
90 parts by mass of methyl ethyl ketone / toluene (mass ratio 1/1)

< Reference Example 1 / Comparative Example 1>
(Production of image receiving sheet)
Preparation of Sample 101 (Comparative Example) Synthetic paper (Yupo FPG200, thickness 200 μm, trade name, manufactured by YUPO Corporation) was used as a support, and a receiving layer having the following composition was applied to one surface thereof. Coating was performed so that the receiving layer was 4.0 g / m ^2, and drying was performed at 50 ° C. for 30 seconds.
Receiving layer 100 parts by mass of vinyl chloride-vinyl acetate resin (Solvine A ^* , trade name, manufactured by Nissin Chemical Industry Co., Ltd.)
Amino-modified silicone 5 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., trade name, X22-3050C)
Epoxy-modified silicone 5 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., trade name, X22-300E)
Methyl ethyl ketone / toluene (mass ratio 1/1) 400 parts by mass * Number average molecular weight 30,000, copolymerization ratio (mass ratio) 96: 4

Preparation of Sample 102 (Comparative Example) Only the receiving layer had the following composition, and the others were prepared in the same manner as Sample 101.
Receiving layer 100 parts by mass of polyester resin (Byron 200 ^** , trade name, manufactured by Toyobo Co., Ltd.)
Amino-modified silicone 5 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., trade name, X22-3050C)
Epoxy-modified silicone 5 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., trade name, X22-300E)
Methyl ethyl ketone / toluene (mass ratio 1/1) 400 parts by mass ** Number average molecular weight 17,000

Only Preparation receiving layer of Sample 103 (reference example) to form the following composition, and otherwise in the same manner as Sample 101, prepared to that heat-sensitive transfer image-receiving sheet containing a dye acceptors polymer and the image receiving function improving agent in the receiving layer did.
Receiving layer 100 parts by mass of vinyl chloride-vinyl acetate resin (Solvine A, trade name, manufactured by Nissin Chemical Industry Co., Ltd.)
Amino-modified silicone 5 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., trade name, X22-3050C)
Epoxy-modified silicone 5 parts by mass (manufactured by Shin-Etsu Chemical Co., Ltd., trade name, X22-300E)
High boiling point solvent (Solv-1) 5 parts by mass Methyl ethyl ketone / toluene (mass ratio 1/1) 400 parts by mass

Samples 104 to 111 ( reference examples ) were prepared in the same manner as in sample 103 except that the high-boiling solvent used in Table 1 was used instead of Solv-1.

(Image formation)
The ink sheet obtained in the reference example and the image receiving sheets of the samples 101 to 111 were overlapped so that the former ink layer and the latter receiving layer were in contact with each other, and a thermal transfer printer (manufactured by Nidec Copal, DPB- (1500, product name). The output image used gradations that give each sample a gray, yellow single color, magenta single color, and cyan single color, respectively.
In addition, before performing image output, the samples 101-111 were preserve | saved for 10 days by temperature 50 degreeC humidity 80% atmosphere.

(Image evaluation)
In the image evaluation, both the maximum reflection density (Dmax) and the change with time of the fine line that output various gray line widths with a reflection density of 1.0 (aging condition: 60 ° C./Dry, 2 weeks) were observed. For the maximum reflection density, a spectrophotometer (manufactured by Gretag Macbeth, SpectroEye, trade name) was used for the maximum reflection density, and the change with time of the thin line was evaluated by distinguishing as follows by observation measurement of five observers.
[Change with time of fine line] 1: Almost no change is observed, and there is substantially no problem.
2: A slight change is observed, and a reduction in image quality can be recognized.
3: A change is observed and color bleeding occurs.

From the comparison between the samples 101 and 102 and the samples 103 to 120, the image receiving sheet of the reference example containing the dyeable receiving polymer and the image receiving function improving agent is compared with the sample of the comparative example not containing the image receiving function improving agent. It can be seen that the transfer density is greatly improved.

< Reference Example 2>
Samples 203 to 211 ( reference examples ) were prepared using Byron 200 (manufactured by Toyobo Co., Ltd.) instead of sorbine A in samples 103 to 111. In addition, the usage-amount was made to become the same mass part by solid content of a polymer. When the obtained samples 203 to 211 were subjected to the same image evaluation test as in Reference Example 1 and Comparative Example 1, an effect of improving the transfer density and an effect of suppressing the change with time of the fine line were obtained.

<Example 1 >
As shown in Table 2, with respect to Sample 103 and Sample 107, any one of compounds (A-6), (A-10), and (A-50) among the compounds represented by Formula (Ph) is further added. Samples 301 to 318 were produced in the same manner except that the addition was performed. In addition, the addition amount of the compound added additionally was shown in Table 2 as a mass part.

(Light fastness evaluation)
The concentration was measured before and after exposure to 100,000 lux Xe light for 14 days. The relative residual ratio of each hue after storage at a reflection density of 1.0 for yellow, magenta, and cyan was calculated by averaging.

  From the results shown in Table 2, it can be seen that the image fastness is improved by adding the compound represented by the general formula (Ph). Further, by further increasing the addition amount, a further effect of improving the image fastness was obtained.

<Example 2 >
Samples 301 to 318, samples 401 to 418 (Sample 401～406,410～415 is a is the invention) was prepared using Byron 200 (manufactured by Toyobo) instead of SOLBIN A. In addition, the usage-amount was made to become the same mass part by solid content of a polymer. When the same light fastness evaluation test as in Example 1 was performed, the effect of improving the image fastness was also obtained for Samples 401 to 418.

< Reference Example 3 >
As shown in Table 3 with respect to Sample 103 and Sample 107, the sample was prepared in the same manner except that any one of the compounds represented by any of the general formulas (E-1) to (E-3) was further added. 501-515 were produced. In addition, the addition amount of the compound represented by any of general formula (E-1)-(E-3) was shown as a mass part in Table 3.

Images were formed in the same manner as in Reference Example 1 and Comparative Example 1, and light fastness was evaluated in the same manner as in Example 1 . Further, an ozone resistance test was performed in an atmosphere of ozone gas of 5 ppm, and the relative residual ratio of each hue after storage at a reflection density of 1.0 for yellow, magenta, and cyan was calculated by averaging.
A: The average relative residual rate of each hue is 90% or more. ○: The average relative residual rate of each hue is 80% or more. Δ: The average relative residual rate of each hue is 70% or more. From the results shown in Table 3, the general formula (E It can be seen that the light fastness of the image is improved by adding the compounds represented by -1) to (E-3).
Furthermore, as a surprising effect, the samples 501 to 518 to which the compounds represented by the general formulas (E-1) to (E-3) were added had improved resistance to ozone.

< Reference Example 4 >
Samples 601 to 618 ( reference examples ) were prepared using Byron 200 (manufactured by Toyobo) instead of sorbine A for samples 501 to 518. In addition, the usage-amount was made to become the same mass part by solid content of a polymer. When an evaluation test of light fastness and ozone resistance was conducted in the same manner as in Reference Example 3 , the effect of improving image fastness and the effect of improving ozone resistance were also obtained for samples 501 to 518.

< Reference Example 5 >
Samples 701 to 713 were produced in the same manner except that any of the compounds represented by the general formula (B) shown in Table 4 was further added to the sample 512. The addition amount of the compound represented by the general formula (B) was set to 10 parts by mass.

Images were formed in the same manner as in Reference Example 1 and Comparative Example 1, and light fastness and ozone resistance were evaluated in the same manner as in Example 5.
From the results shown in Table 4, it can be seen that the image fastness and ozone resistance are further improved by adding the alkenylcarbonyl compound represented by the general formula (B).

< Reference Example 6 >
Samples 801 to 713 ( reference examples ) were prepared using Byron 200 (manufactured by Toyobo) instead of sorbine A for samples 701 to 713. In addition, the usage-amount was made to become the same mass part by solid content of a polymer. When the light fastness evaluation test and the ozone resistance evaluation test were performed in the same manner as in Reference Example 5 , the effect of improving the image fastness and ozone resistance was also obtained for samples 801 to 813.

<Example 3 >
As shown in Table 5, samples 901 to 926 ( samples 901 to 903, 913 to 916, and 926) were similarly added to sample 103 and sample 107 as shown in Table 5, except that any one of the image receiving function improvers other than those described above was further added. There was prepared a is) present invention. The amount of other image receiving function improver added was 10 parts by mass.

Images were formed in the same manner as in Reference Example 1 and Comparative Example 1, and light fastness was evaluated in the same manner as in Example 1 . From the results shown in Table 5, it can be seen that the image fastness is improved by adding the image receiving function improving agent.

<Example 4 >
Samples 901 to 926, the sample 1001 to 1026 (Sample 1001～1003,1013～1016 and 1026 are the present invention) using Byron 200 (manufactured by Toyobo) instead of SOLBIN A was produced present invention). In addition, the usage-amount was made to become the same mass part by solid content of a polymer. When the same light fastness evaluation test as in Example 3 was performed, the effect of improving the image fastness was also obtained for Samples 1001 to 1026.

Claims (6)

A heat-sensitive transfer image-receiving sheet having a receiving layer, wherein (i) at least one dyeable receiving polymer selected from a polymer having a vinyl chloride skeleton and a polymer having a polyester skeleton, and (ii) the following general formula: (Ph-1) ′, (TS-ID) 2 , ( TS-IIIB), or (TS-IIIC) Thermal transfer image receiving sheet.

[In General Formula (Ph-1) ′, R _b1 represents a methyl group, and R _b6 represents an aliphatic group .
In the general formula (TS-ID), R ₅₁ represents an aliphatic group . R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ each independently represent a hydrogen atom or a substituent. R ₅₇ has the same meaning as R ₅₁ . However, the total carbon number of the compound is 10 or more.
In General Formula (TS-III B ) , R ₆₅ represents a hydrogen atom, and R _c3 represents an aryl group. X ₆₃ represents a nonmetallic atom group necessary for forming a pyrazolidine ring together with —N—N—.
In general formula (TS-IIIC), R ₆₅ ′ and R ₆₆ each independently represent an aliphatic group, and R _c3 ′ represents an aliphatic group. ] A heat-sensitive transfer image-receiving sheet having a receiving layer, wherein (i) at least one dyeable receiving polymer selected from a polymer having a vinyl chloride skeleton and a polymer having a polyester skeleton, and (ii) the following general formula: (TS-ID), (TS -IIIB), or (TS-IIIC) heat-sensitive transfer image-receiving sheet, characterized in that it contains at least one image receiving function enhancing agent is a compound represented by any one of the.

[In the general formula (TS-ID), R ₅₁ represents an aliphatic group . R ₅₂ , R ₅₃ , R ₅₅ and R ₅₆ each independently represent a hydrogen atom or a substituent. R ₅₇ has the same meaning as R ₅₁ . However, the total carbon number of the compound is 10 or more.
In General Formula (TS-III B ) , R ₆₅ represents a hydrogen atom, and R _c3 represents an aryl group. X ₆₃ represents a nonmetallic atom group necessary for forming a pyrazolidine ring together with —N—N—.
In general formula (TS-IIIC), R ₆₅ ′ and R ₆₆ each independently represent an aliphatic group, and R _c3 ′ represents an aliphatic group. ]   The thermal transfer image-receiving sheet according to claim 2, wherein the image-receiving function improver is a compound represented by the general formula (TS-ID). The thermal transfer image-receiving sheet according to claim 2, wherein the image-receiving function improver is a compound represented by the general formula ( TS-IIIB) or (TS-IIIC ) .   The thermal transfer image-receiving sheet according to claim 2, wherein the image-receiving function improver is a compound represented by the general formula (TS-IIIB). A method for producing a thermal transfer image-receiving sheet, comprising: forming a receiving layer by mixing at least the dyeable receiving polymer according to any one of claims 1 to 5 and the image-receiving function improving agent.