JP2013223945A - Vinyl chloride resin latex for thermal sublimation transfer image-receiving sheet, and thermal sublimation transfer image-receiving sheet using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vinyl chloride resin latex for thermal sublimation transfer image-receiving sheet having excellent storage stability, and to provide a thermal sublimation transfer image-receiving sheet that can form a superior image.SOLUTION: There are provided a vinyl chloride resin latex for thermal sublimation transfer image-receiving sheet characterized by containing alkylbenzene sulfonates of >1 to ≤5 pts.wt. based on vinyl chloride homopolymer of 100 pts.wt. and having the average particle size of ≤0.15 μm, and the thermal sublimation transfer image-receiving sheet using the latex.

Description

  TECHNICAL FIELD The present invention relates to a vinyl chloride resin latex for a heat-sensitive sublimation transfer image-receiving sheet and a heat-sensitive sublimation-type transfer image-receiving sheet using the same, and more specifically, a chloride for a heat-sensitive sublimation-type transfer image-receiving sheet capable of forming an excellent image. The present invention relates to a vinyl resin latex and a heat-sensitive sublimation transfer image-receiving sheet capable of excellent image formation.

  2. Description of the Related Art Conventionally, characters and images are formed on a transfer object using a thermal transfer method. As the thermal transfer method, a thermal sublimation transfer method and a thermal fusion transfer method are widely used. Among these, the heat-sensitive sublimation transfer method uses a sublimation dye as a color material, and uses a heating device such as a thermal head or laser light whose heat is controlled according to image information, in the sublimation dye layer on the thermal transfer sheet. This dye is transferred to a transfer medium such as a thermal transfer image-receiving sheet to form an image. This heat-sensitive sublimation transfer method can control the amount of dye transfer in dot units by overheating for a very short time. The image formed in this way is very clear because the colorant used is a dye and is excellent in transparency, so the resulting image is excellent in halftone reproducibility and gradation, An extremely high-definition image can be obtained. For this reason, a high quality image comparable to a full-color silver salt photograph can be obtained. 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.

  Generally, a heat-sensitive transfer image-receiving sheet has at least a dye image-receiving layer (receiving layer) and a heat insulating layer formed on a support. As the resin for forming the receiving layer, vinyl chloride resin is used because it is excellent in dyeing and releasing properties, and abnormal transfer such as fusion does not occur between the thermal transfer sheet and the thermal transfer image-receiving sheet during thermal transfer. Has been. A vinyl chloride resin has been conventionally used by being dissolved in an organic solvent when applied to a base sheet for forming a receiving layer.

  However, there is a concern about the deterioration of the working environment due to the use of organic solvents.

  Therefore, a method of forming a receiving layer using vinyl chloride resin latex without using an organic solvent has been widely studied (Patent Documents 1 and 2).

  However, the storage stability of the PVC latex was inferior, and a satisfactory image could not be obtained with the heat-sensitive sublimation transfer image-receiving sheet using the vinyl chloride resin latex.

  As described above, there has been no vinyl chloride resin latex capable of obtaining a heat-sensitive sublimation type transfer image-receiving sheet which is excellent in latex storage stability and capable of excellent image formation.

JP 2006-264087 A JP 2008-6752 A

  An object of the present invention is to provide a vinyl chloride resin latex for a heat-sensitive sublimation transfer image-receiving sheet and a heat-sublimation image-receiving sheet that are excellent in latex storage stability and capable of excellent image formation.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors contained 1 part by weight of alkylbenzene sulfonate and 5 parts by weight or less with respect to 100 parts by weight of the vinyl chloride homopolymer, and the average particle size was 0. The vinyl chloride resin latex having a thickness of 15 μm or less has excellent latex storage stability, and the heat-sensitive sublimation transfer image-receiving sheet produced using this latex has found that excellent image formation is possible, leading to the present invention. It was. That is, the present invention comprises a heat-sensitive heat-sensitive material containing not less than 1 part by weight of alkylbenzene sulfonate and not more than 5 parts by weight and an average particle size of not more than 0.15 μm with respect to 100 parts by weight of vinyl chloride homopolymer. A vinyl chloride resin latex for a sublimation type transfer image receiving sheet and a heat-sensitive sublimation type transfer image receiving sheet using the same.

  The present invention is described in detail below.

  The vinyl chloride resin latex for heat-sensitive sublimation type transfer image-receiving sheet of the present invention (hereinafter sometimes abbreviated as vinyl chloride resin latex) exceeds 5 parts by weight of alkylbenzene sulfonate with respect to 100 parts by weight of vinyl chloride homopolymer. It contains no more than parts by weight.

  The vinyl chloride homopolymer is obtained by polymerizing a vinyl chloride monomer alone.

  Examples of the alkyl benzene sulfonate include sodium dodecyl benzene sulfonate, potassium dodecyl benzene sulfonate, and ammonium dodecyl benzene sulfonate. Further, the structure of the alkyl group may be either linear or branched. Sodium dodecylbenzenesulfonate is preferred because it is readily available. When the alkylbenzene sulfonate is 1 part by weight or less, the latex aggregates during the storage of the latex and precipitates are generated, resulting in poor storage stability. When the amount exceeds 5 parts by weight, the image is blurred and a good image cannot be obtained. In order to further improve the storage stability, the amount is preferably 1.5 to 5 parts by weight.

  The average particle diameter of the vinyl chloride homopolymer in the vinyl chloride resin latex is 0.15 μm or less. When the average particle size exceeds 0.15 μm, there is a problem that precipitates are generated after long-term storage. The average particle diameter is preferably 0.12 μm or less, more preferably 0.10 μm or less.

The vinyl chloride resin latex of the present invention may contain a chain transfer agent, a reducing agent, a buffering agent, an emulsifier other than alkylbenzene sulfonate, and the like.
Here, the chain transfer agent may be any one that can adjust the degree of polymerization of the vinyl chloride polymer. For example, halogenated hydrocarbons such as trichloroethylene and carbon tetrachloride; 2-mercaptoethanol, 3-mercaptopropion Examples include mercaptans such as octyl acid and dodecyl mercaptan; aldehydes such as acetone and n-butyraldehyde. Examples of the reducing agent include sodium sulfite, ammonium sulfite, sodium hydrogen sulfite, ammonium hydrogen sulfite, ammonium thiosulfate, potassium metabisulfite, sodium dithionite, sodium formaldehyde sulfoxylate, L-ascorbic acid, dextrose, Examples thereof include ferrous sulfate and copper sulfate. Examples of the buffer include mono- or dihydrogen alkali metal phosphates, potassium hydrogen phthalate, sodium hydrogen carbonate, and the like. Examples of emulsifiers other than alkylbenzene sulfonate include alkyl sulfate salts such as sodium lauryl sulfate and myristyl sulfate; sulfosuccinates such as sodium dioctyl sulfosuccinate and sodium dihexyl sulfosuccinate; polyoxyethylene alkyl sulfate salts; Polyoxyethylene alkylaryl sulfate salts; anionic surfactants such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and higher fatty acid salts such as sodium, potassium, ammonia, triethanolamine; sorbitan monooleate Sorbitan esters such as polyoxyethylene sorbitan monostearate; polyoxyethylene alkylphenyl ethers, polyoxyethylene alcohol Glycol ester, polyalkylene glycols, polyvinyl alcohol, partially saponified polyvinyl alcohol, partially saponified polymethyl methacrylate, nonionic surfactants such as polyacrylic acid and salts thereof. These may be used alone or in combination of two or more. The emulsifiers other than these alkylbenzene sulfonates preferably contain 3.0 parts by weight or less of higher fatty acid salts with respect to 100 parts by weight of vinyl chloride homopolymer.

  In the vinyl chloride resin latex of the present invention, the vinyl chloride monomer is present in an amount of 0.08 to 5 parts by weight, preferably 0.2 to 5 parts by weight, more preferably 0.5 to 5 parts by weight, of alkylbenzene sulfonate. Below, it is obtained by emulsion polymerization.

  In the emulsion polymerization, water is used as a dispersion medium, and a vinyl chloride monomer in an amount of 5 to 150% by weight based on the dispersion medium is used at a temperature of about 30 to 100 ° C. using a polymerization initiator in the presence of an alkylbenzene sulfonate. The polymerization is carried out at 40 to 80 ° C. for 3 to 24 hours with stirring.

  The polymerization initiator is a water-soluble initiator such as potassium persulfate or ammonium persulfate, an azo compound typified by tyronitrile, lauroyl peroxide, or t-butylperoxypivalate, a diacyl peroxide, a peroxyester, or a peroxydicarbonate. And oil-soluble initiators such as

  The polymerization rate of the vinyl chloride monomer is preferably 80 to 97% by weight based on the total monomers.

  The polymerization is terminated by recovering the monomer by reducing the pressure in the vessel to normal pressure and further reducing the pressure. A polymerization inhibitor may be added to terminate the polymerization.

  If necessary, alkylbenzene sulfonic acid sulfonate can be additionally added to the latex after the polymerization so as to contain more than 1 part by weight and 5 parts by weight or less with respect to 100 parts by weight of the vinyl chloride homopolymer. .

  Furthermore, when producing the vinyl chloride resin latex of the present invention, a chain transfer agent, a reducing agent, a buffering agent, an emulsifier other than an alkylbenzene sulfonate is added for the purpose of stabilizing the polymerization and reducing the amount of scale generated. You can also.

  The vinyl chloride resin latex for a heat-sensitive sublimation type transfer image-receiving sheet of the present invention can form a receiving layer of a heat-sublimation type transfer image-receiving sheet by coating and drying on the sheet. Here, the heat-sensitive sublimation type transfer image-receiving sheet is, for example, one having a structure of an underlayer, a heat insulating layer, and a receiving layer on a support.

  Since the vinyl chloride resin latex of the present invention is excellent in storage stability, a heat-sensitive sublimation transfer image-receiving sheet capable of excellent image formation can be provided.

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

  Various evaluation methods for latex, methods for producing a heat-sensitive sublimation transfer image-receiving sheet, and image formation test methods are as follows.

<Storage stability of latex>
The vinyl chloride resin latex was diluted with water to adjust the solid content to 30% by weight. 500 g of vinyl chloride resin latex was placed in a transparent glass bottle and allowed to stand at room temperature for 1 month. The presence or absence of precipitates in the latex was visually confirmed and evaluated as follows.

    ○: No sediment is generated.

    Δ: Slight occurrence was observed.

    X: A large amount of sediment was observed.

<Average particle diameter of vinyl chloride homopolymer>
A measurement sample prepared by adding water to a vinyl chloride resin latex so that the laser transmittance is 84 to 86% and adjusting the concentration is used as a laser diffraction / scattering particle size measuring device (trade name LA-920, HORIBA, Ltd.). Was used to measure the median diameter, and the average particle diameter was determined.

<Method for producing heat-sensitive sublimation transfer image-receiving sheet>
The vinyl chloride resin latex was diluted with water to adjust the solid content to 30% by weight. Next, PPC paper (Mitsubishi Paper Co., Ltd. Mitsubishi PPC paper A4 (neutral paper)) was fixed on a flat metal plate. A latex having a solid content adjusted to 30% by weight was poured onto the upper surface of the PPC paper, and coating was performed with a doctor blade to a thickness of about 0.25 mm. After coating, the PPC paper was dried at room temperature for 72 hours to produce a heat-sensitive sublimation transfer image-receiving sheet.

<Image formation test method>
After confirming that the heat-sensitive sublimation transfer image-receiving sheet prepared using PPC paper was dry, cut the PPC paper to the same size as paper KL-361P (color ink / paper set manufactured by Canon Inc.) and print KL-361P. The cut PPC paper was stuck on the surface with double-sided tape.

  Paper is set in a paper cassette of SELPHY CP-800 (manufactured by Canon Inc., sublimation type thermal transfer printer) so that the surface coated with the test latex becomes the printing surface, and printing is performed with SELPHY CP-800. The image formability was determined as follows based on the sharpness of printing and the degree of bleeding.

    5: Printing is clear and no bleeding is observed.

    4: Slight bleeding is observed.

    3: The print contents can be understood but the color is light.

    2: The color is thin and the printed content is unknown.

    1: Not printed.

Example 1
In a 2.5 L autoclave, 830 g of deionized water, 750 g of vinyl chloride monomer, 6.8 g of 3% by weight potassium persulfate and 75 g of 5% by weight aqueous sodium dodecylbenzenesulfonate solution (0.50 parts by weight based on the monomer) ) And the temperature was raised to 66 ° C. to initiate emulsion polymerization. The temperature was kept at 66 ° C., and 60 minutes after the start of polymerization, 270 g of a 5 wt% aqueous sodium dodecylbenzenesulfonate solution (1.80 parts by weight with respect to the monomer) was continuously added over 360 minutes. After the pressure in the autoclave at 66 ° C. dropped to 0.7 MPa, unreacted vinyl chloride monomer was recovered to obtain a vinyl chloride resin latex (of sodium dodecylbenzenesulfonate with respect to 100 parts by weight of vinyl chloride homopolymer). (Amount: 2.56 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. When an image formation test was carried out, printing was clear and no bleeding was observed, and the result was good (score 5).

Example 2
In a 2.5 L autoclave, 830 g of deionized water, 750 g of vinyl chloride monomer, 6.8 g of 3% by weight potassium persulfate and 105 g of 5% by weight aqueous sodium dodecylbenzenesulfonate (0.70 parts by weight based on the monomer) ) And the temperature was raised to 66 ° C. to initiate emulsion polymerization. The temperature was kept at 66 ° C., and 60 minutes after the start of polymerization, 240 g of a 5 wt% aqueous sodium dodecylbenzenesulfonate solution (1.60 parts by weight with respect to the monomer) was continuously added over 360 minutes. After the pressure in the autoclave at 66 ° C. dropped to 0.7 MPa, unreacted vinyl chloride monomer was recovered to obtain a vinyl chloride resin latex (of sodium dodecylbenzenesulfonate with respect to 100 parts by weight of vinyl chloride homopolymer). (Amount: 2.56 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. When an image formation test was carried out, printing was clear and no bleeding was observed, and the result was good (score 5).

Example 3
In a 2.5 L autoclave, 830 g of deionized water, 750 g of vinyl chloride monomer, 6.8 g of 3% by weight potassium persulfate and 135 g of 5% by weight sodium dodecylbenzenesulfonate aqueous solution (0.90 parts by weight based on the monomer) ) And the temperature was raised to 66 ° C. to initiate emulsion polymerization. The temperature was kept at 66 ° C., and after 60 minutes from the start of polymerization, 210 g of a 5 wt% aqueous sodium dodecylbenzenesulfonate solution (1.40 parts by weight with respect to the monomer) was continuously added over 360 minutes. After the pressure in the autoclave at 66 ° C. dropped to 0.7 MPa, unreacted vinyl chloride monomer was recovered to obtain a vinyl chloride resin latex (of sodium dodecylbenzenesulfonate with respect to 100 parts by weight of vinyl chloride homopolymer). (Amount: 2.56 parts by weight). When an average particle diameter was measured, it was 0.09 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. When an image formation test was carried out, printing was clear and no bleeding was observed, and the result was good (score 5).

Example 4
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 5 g of 3% by weight potassium persulfate and 75 g of 5% by weight sodium dodecylbenzenesulfonate aqueous solution (0.50 parts by weight based on the monomer) The emulsion polymerization was advanced by charging and raising the temperature to 66 ° C. After the saturated vapor pressure of vinyl chloride at 66 ° C. decreased to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this was added 87 g of sodium dodecylbenzenesulfonate having a concentration of 5% by weight (0.58 parts by weight based on the monomer) to obtain a vinyl chloride resin latex (dodecylbenzenesulfone with respect to 100 parts by weight of vinyl chloride homopolymer). Amount of sodium acid: 1.20 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, the generation of sediment was slight (Δ), and the result was good. When an image formation test was carried out, printing was clear and no bleeding was observed, and the result was good (score 5).

Example 5
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 5 g of 3% by weight potassium persulfate and 75 g of 5% by weight sodium dodecylbenzenesulfonate aqueous solution (0.50 parts by weight based on the monomer) The emulsion polymerization was advanced by charging and raising the temperature to 66 ° C. After the saturated vapor pressure of vinyl chloride at 66 ° C. decreased to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this, 195 g of sodium dodecylbenzenesulfonate having a concentration of 5% by weight (1.30 parts by weight with respect to the monomer) was further added to obtain a vinyl chloride resin latex (dodecylbenzenesulfone with respect to 100 parts by weight of vinyl chloride homopolymer). Amount of sodium acid: 2.00 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. When an image formation test was carried out, printing was clear and no bleeding was observed, and the result was good (score 5).

Example 6
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 5 g of 3% by weight potassium persulfate and 75 g of 5% by weight sodium dodecylbenzenesulfonate aqueous solution (0.50 parts by weight based on the monomer) The emulsion polymerization was advanced by charging and raising the temperature to 66 ° C. After the saturated vapor pressure of vinyl chloride at 66 ° C. decreased to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this was further added 235 g of sodium dodecylbenzenesulfonate having a concentration of 5% by weight (1.57 parts by weight based on the monomer) to obtain a vinyl chloride resin latex (dodecylbenzenesulfone with respect to 100 parts by weight of vinyl chloride homopolymer). Amount of sodium acid: 2.30 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. When an image formation test was carried out, printing was clear and no bleeding was observed, and the result was good (score 5).

Comparative Example 1
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 6.8 g of 3% by weight potassium persulfate were charged, the temperature was raised to 66 ° C., and emulsion polymerization was started. The temperature was maintained at 66 ° C., and from 60 minutes after the start of polymerization, 117 g of a 5% by weight aqueous sodium dodecylbenzenesulfonate solution (0.78 parts by weight with respect to the monomer) was continuously added over 360 minutes. After the pressure in the autoclave at 66 ° C. dropped to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this, 345 g of sodium dodecylbenzenesulfonate having a concentration of 5% by weight (2.30 parts by weight with respect to the monomer) was further added to obtain a vinyl chloride resin latex (dodecylbenzenesulfone with respect to 100 parts by weight of the vinyl chloride homopolymer). Amount of sodium acid: 2.56 parts by weight). When an average particle diameter was measured, it was 0.38 μm.

  When the storage stability of the latex was evaluated, a large amount of sediment was observed (x), which was an inferior result. When an image formation test was performed, the printed contents were understood, but the color was thin and inferior (score 3).

Comparative Example 2
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 6.8 g of 3% by weight potassium persulfate and 8 g of 5% by weight aqueous sodium dodecylbenzenesulfonate solution (0.05 parts by weight based on the monomer) ) And the temperature was raised to 66 ° C. to initiate emulsion polymerization. The temperature was maintained at 66 ° C., and from 60 minutes after the start of polymerization, 117 g of a 5% by weight aqueous sodium dodecylbenzenesulfonate solution (0.78 parts by weight with respect to the monomer) was continuously added over 360 minutes. After the pressure in the autoclave at 66 ° C. dropped to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this, 337 g of sodium dodecylbenzenesulfonate having a concentration of 5% by weight (2.25 parts by weight with respect to the monomer) was added to obtain a vinyl chloride resin latex (dodecylbenzenesulfone with respect to 100 parts by weight of vinyl chloride homopolymer). Amount of sodium acid: 2.56 parts by weight). The average particle size was measured and found to be 0.19 μm.

  When the storage stability of the latex was evaluated, the generation of sediment was slight (Δ), and when an image formation test was carried out, the printed content was found but the color was thin and inferior (score 3).

Comparative Example 3
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 5 g of 3% by weight potassium persulfate and 75 g of 5% by weight sodium dodecylbenzenesulfonate aqueous solution (0.50 parts by weight based on the monomer) The emulsion polymerization was advanced by charging and raising the temperature to 66 ° C. After the saturated vapor pressure of vinyl chloride at 66 ° C. decreased to 0.7 MPa, unreacted vinyl chloride monomer was recovered to obtain a vinyl chloride resin latex (sodium dodecylbenzenesulfonate based on 100 parts by weight of vinyl chloride homopolymer). Amount of 0.56 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, a large amount of sediment was observed (x), which was an inferior result. However, when an image formation test was performed, the printing was clear and no blur was observed, and the result was good (score 5).

Comparative Example 4
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 5 g of 3% by weight potassium persulfate and 75 g of 5% by weight sodium dodecylbenzenesulfonate aqueous solution (0.50 parts by weight based on the monomer) The emulsion polymerization was advanced by charging and raising the temperature to 66 ° C. After the saturated vapor pressure of vinyl chloride at 66 ° C. decreased to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this, 245 g of sodium dodecylbenzenesulfonate having a concentration of 15% by weight (4.90 parts by weight with respect to the monomer) was added to obtain a vinyl chloride resin latex (dodecylbenzenesulfone with respect to 100 parts by weight of vinyl chloride homopolymer). Amount of sodium acid: 6.00 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. However, when an image formation test was performed, the printed content was understood, but the color was thin and inferior (score 3).

Comparative Example 5
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 5 g of 3% by weight potassium persulfate and 75 g of 5% by weight aqueous sodium alkyldiphenyl ether disulfonate (0.50 parts by weight based on the monomer) And the temperature was raised to 66 ° C. to proceed the emulsion polymerization. After the saturated vapor pressure of vinyl chloride at 66 ° C. decreased to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this was further added 393 g of sodium alkyldiphenyl ether disulfonate having a concentration of 5% by weight (2.62 parts by weight based on the monomer) to obtain a vinyl chloride resin latex (alkyl diphenyl ether based on 100 parts by weight of vinyl chloride homopolymer). Amount of sodium disulfonate: 3.47 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. However, when an image formation test was performed, the printed content was understood, but the color was thin and inferior (score 3).

Comparative Example 6
In a 2.5 L autoclave, 900 g of deionized water, 750 g of vinyl chloride monomer, 5 g of 3 wt% potassium persulfate and 75 g of 5 wt% sodium lauryl sulfate aqueous solution (0.50 parts by weight with respect to the monomer) were charged. The temperature was raised to 66 ° C. to proceed with emulsion polymerization. After the saturated vapor pressure of vinyl chloride at 66 ° C. decreased to 0.7 MPa, unreacted vinyl chloride monomer was recovered. To this was added 393 g of sodium lauryl sulfate at a concentration of 5% by weight (2.62 parts by weight based on the monomer) to obtain a vinyl chloride resin latex (amount of sodium lauryl sulfate relative to 100 parts by weight of vinyl chloride homopolymer). : 3.47 parts by weight). The average particle diameter was measured and found to be 0.10 μm.

  When the storage stability of the latex was evaluated, no precipitate was observed (O), and the result was good. However, when an image formation test was performed, the printed content was understood, but the color was thin and inferior (score 3).

Claims (3)

For heat-sensitive sublimation type transfer image-receiving sheet, comprising more than 1 part by weight of alkylbenzenesulfonate and 5 parts by weight or less with respect to 100 parts by weight of vinyl chloride homopolymer, and having an average particle size of 0.15 μm or less Vinyl chloride resin latex. 2. The vinyl chloride resin latex for heat-sensitive sublimation type transfer image-receiving sheet according to claim 1, wherein the alkylbenzene sulfonate is sodium dodecylbenzenesulfonate. A heat-sensitive sublimation transfer image-receiving sheet, wherein a receiving layer is formed using the vinyl chloride resin latex according to claim 1.