JPH06135162A - Image receiving material of sublimation type thermal transfer recording device - Google Patents

Abstract

PURPOSE:To obtain the receiving material forming a recording image excellent in light fastness and reduced in fading and discoloration due to light by forming an image receiving layer composed of a resin compsn. containing a phosphite oxidation inhibitor represented by a specific formula and a compd. represented by a specific formula on the surface of a base material. CONSTITUTION:An image receiving material of a sublimation type thermal transfer recording system is obtained by forming an image receiving layer composed of a resin compsn. containing at least one kind of a phosphite oxidation inhibitor represented by one of formulae I, II (wherein R1 and R2 are H or a 1-20C alkyl group, R3 and R4 are a 1-20C alkyl group, A and B are H or an atomic group containing 1-10 carbon atoms as a main skeleton and n is 1, 2, 3 or 4) and at least one kind of a compd. represented by formula III (wherein R5 is a 1-20C alkyl group and Z is a substituted or non-substituted phenylene or naphthylene group) on the surface of a base material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sublimation type thermal transfer recording type recording medium capable of forming a recorded image having excellent light resistance.

[0002]

2. Description of the Related Art The sublimation type thermal transfer recording system is characterized in that the sound at the time of recording is quiet, the apparatus is small and inexpensive, the maintenance is easy, and the output time is short. further,
Since a sublimation dye is used, it is possible to easily perform recording with a high gradation by continuously changing the amount of heat generation energy, and it has characteristics such as high density and high resolution. Therefore, it is particularly advantageous in obtaining a full-color hard copy as compared with other recording systems, and is widely used as a recording system for color printers, video printers, and the like.

However, since an image recorded by the sublimation type thermal transfer system is formed of a sublimable dye, it generally has poor light resistance and is easily discolored or discolored by sunlight or fluorescent light. There is a drawback that. For the purpose of solving this drawback, an ultraviolet absorber or a light stabilizer is generally added to the image-receiving layer of the recording medium, and the light resistance is improved to some extent by this, but it cannot be said to be sufficient. Further, as described in JP-A-1-127387, a method of adding a specific phenolic antioxidant to the image-receiving layer and JP-A-3-19893 and JP-A-61-229594 are described. As described above, a method of adding a specific phosphorus-based antioxidant to the image-receiving layer has been proposed, and a slight light resistance improving effect is recognized, but the degree of fading or discoloration due to light is still large.

[0004]

SUMMARY OF THE INVENTION Therefore, the object of the present invention is to improve the above-mentioned drawbacks of the prior art, to obtain excellent light resistance of a recorded image, and to prevent the fading and discoloration due to light in the sublimation type thermal transfer recording method. To get a record.

[0005]

This problem is solved by incorporating a plurality of compounds having a specific structure in the image receiving layer.

That is, according to the present invention, (a) at least one of the phosphite-based antioxidants represented by the following general formula (1) or (2), and (b) the following general formula (3) are provided on the surface of the substrate.
A sublimation-type heat-sensitive transfer recording system recording medium having an image receiving layer formed of a resin composition containing at least one compound represented by

[0007]

[Chemical 3]

(However, in the general formulas (1) and (2), R ₁ and R ₂ are H, an alkyl group having 1 to 20 carbon atoms, and R _1
3 , R ₄ is an alkyl group having 1 to 20 carbon atoms, A and B are H,
An atomic group having 1 to 10 carbons as a main skeleton, and n = 1, 2, 3, 4. )

[0009]

[Chemical 4]

(Wherein R _{5 is} an alkyl group having 1 to 20 carbon atoms, Z is a substituted or unsubstituted phenylene group or naphthylene group.) The present invention is described in detail below.

Films or papers are suitable as the substrate constituting the recording medium of the present invention, and for example, various plastics such as polyester film, polyethylene film, polypropylene film, polystyrene film, nylon film, vinyl chloride film and the like can be used. Films and white films obtained by adding white pigments and fillers to these; papers mainly composed of cellulose fibers such as printing paper, art paper and coated paper; papers mainly composed of plastic fibers such as acrylic paper, polypropylene paper and polyester paper Etc.

These papers or films may be used as they are, and those that have been subjected to pretreatments such as cleaning, etching, corona discharge, irradiation with active energy rays, dyeing and printing as needed. You may. Also, a laminated base material obtained by laminating two or more of the above base materials can be used.

The thickness of the substrate is not particularly limited, but is 20
It is preferably about 500 μm.

An image receiving layer is formed on at least one surface of the base material, and the image receiving layer is a layer which develops a color by receiving a sublimable dye transferred from the transfer sheet, and constitutes this image receiving layer. The material is not particularly limited as long as it dyes well with a sublimable dye and does not cause blocking with a transfer sheet at the time of recording, for example, methyl cellulose, ethyl cellulose, ethyl hydroxy cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose,
Cellulose resins such as cellulose acetate; polyvinyl alcohol, polyvinyl butyral, polyvinyl acetal, polyvinyl acetate, polyvinyl chloride, polyvinyl pyrrolidone, styrene and other vinyl resins; polymethyl (meth) acrylate, polybutyl (meth) acrylate,
Acrylate resins such as polyacrylamide and polyacrylonitrile; polyester resins, polycarbonate resins, polyurethane resins, polyamide resins, urea resins, polycaprolactone resins, polyarylate resins, polysulfone resins, etc., and copolymers or mixtures of these dye-staining resins. Can be used as

Of these, the polyester resin is preferably contained as at least one component of the dyeing resin because it dyes well with a sublimable dye and also has good storage stability of the obtained image.

The image-receiving layer of the present invention preferably contains a crosslinkable component for the purpose of further improving the releasability between the image-receiving layer and the transfer sheet. For example, a thermosetting component such as isocyanate and polyol may be contained and thermally crosslinked after the image-receiving layer is formed, or as disclosed in JP-A-62-46689 and JP-A-63-67188. In addition, a cross-linking agent curable with active energy rays, for example, a resin composition containing a monomer and an oligomer having an acryloyloxy group or a methacryloyloxy group is applied on a substrate, and then cured with active energy rays to obtain an image receiving layer. be able to.

In particular, a method of blending a component capable of crosslinking with an active energy ray and curing with an active energy ray to obtain an image receiving layer is a method in which productivity and gloss of the obtained image receiving layer are high, and a recorded image is preserved against heat. It is more preferable because it has high stability.

The amount of the dyeing resin and the crosslinking agent used is not particularly limited, but the total amount of the dyeing resin and the crosslinking component is 1
It is preferable to add 40 to 95% by weight of the dyeing resin and 60 to 5% by weight of the crosslinkable component to 100 parts by weight.

The resin composition containing a crosslinking agent which can be cured with active energy rays is cured with active energy rays such as electron rays and ultraviolet rays. When ultraviolet rays are used as the active energy rays, it is well known. It is desirable to include a photopolymerization initiator.

The amount of the photopolymerization initiator used is not particularly limited, but it should be contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total of the above-mentioned dyeing resin and crosslinkable component forming the image receiving layer. Is preferred.

In the present invention, the above general formula (1) or (2) is used for the purpose of improving the light fastness of the image recorded on the image receiving layer.
In the image-receiving layer, at least one of the phosphite-based antioxidants represented by and at least one of the compounds represented by the general formula (3) are contained.

Specific examples of the phosphite type antioxidant represented by the general formula (1) or (2) include compounds represented by the following structural formulas.

[0023]

[Chemical 5]

These antioxidants can be used alone or in admixture of two or more.

The amount of these antioxidants used is not particularly limited, but is 0.5 to 20 parts by weight, preferably 0.5 to 20 parts by weight, based on 100 parts by weight of the total of the dyeing resin and the crosslinkable component forming the image receiving layer. 2 to 15 parts by weight is desirable.

If the amount used is too small, the excellent light resistance intended by the present invention cannot be obtained. On the contrary, if the amount used is too large, the antioxidant may bleed out to the surface of the image receiving layer,
The recorded image may be blurred over time.

Specific examples of the compound represented by the general formula (3) include compounds represented by the following structural formulas.

[0028]

[Chemical 6]

These compounds can be used alone or in admixture of two or more.

The amount of these compounds used is not particularly limited, but is 0.1 to 10 parts by weight per 100 parts by weight of the total of the dyeing resin and the crosslinkable component forming the image receiving layer.
It is preferable to contain 0.3 to 5 parts by weight.

If the amount used is too small, the excellent light resistance aimed at by the present invention cannot be obtained. On the contrary, if the amount used is too large, the compound bleeds out to the surface of the image receiving layer or the recorded image is aged over time. You may seep into your eyes.

When the phosphite antioxidant represented by the general formula (1) or (2) and the compound represented by the general formula (3) are used in combination in the image-receiving layer, the light resistance of a recorded image is reduced. It has been found that the properties are greatly improved, which was not expected from the conventional technology, and the fading and discoloration due to light are extremely reduced.

In the present invention, for the purpose of further improving the light resistance of the image receiving layer, an ultraviolet absorber may be contained in addition to the above-mentioned plurality of compounds.

As the ultraviolet absorber, a known benzotriazole-based or benzophenone-based ultraviolet absorber can be used. For example, a specific example of the benzotriazole-based ultraviolet absorber is 2- (5-methyl-2-). Hydroxyphenyl) benzotriazole (manufactured by Ciba Geigy: TI
NUVIN P), 2- [2-hydroxy-3,5-bis (α, α-dimethyl-benzyl) phenyl] -2H-
Benzotriazole (Ciba Geigy: TINUVIN
234), 2- (5-t-butyl-2-hydroxyphenyl) benzotriazole (manufactured by Ciba-Geigy: TIN
UVIN PS), 2- (3,5-di-t-butyl-2)
-Hydroxyphenyl) benzotriazole (manufactured by Ciba-Geigy: TINUVIN 320), 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole (manufactured by Ciba-Geigy: TINUV)
IN 326), 2- (3,5-di-t-butyl-2-
Hydroxyphenyl) -5-chlorobenzotriazole (manufactured by Ciba-Geigy: TINUVIN 327), 2-
(3,5-di-t-amyl-2-hydroxyphenyl)
Benzotriazole (Ciba Geigy: TINUVIN
328), 2- [2-hydroxy-3- (3,4,
5,6-Tetrahydrophthalimidomethyl) -5-methylphenyl] benzotriazole (Sumitomo Chemical Industries: S
UMISORB250), 2- (4-octoxy-2-)
Hydroxyphenyl) benzotriazole and the like can be mentioned.

Specific examples of the benzophenone type ultraviolet absorber include 2,4-dihydroxybenzophenone,
2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-dodecyloxybenzophenone, 2-hydroxy-4-benzyloxybenzophenone, 2,2'-
Dihydroxy-4-methoxybenzophenone, 2,
2 ', 4,4'-tetrahydroxybenzophenone,
2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2'-dihydroxy-4,4'-dioctoxybenzophenone, 2,2'-dihydroxy-4,
4'-didodecyloxybenzophenone, 2-hydroxy-4-methoxy-5-sulfobenzophenone and the like can be mentioned.

These ultraviolet absorbers can be used alone or in admixture of two or more.

The amount used is not particularly limited, but is 1 to 10 relative to 100 parts by weight of the total of the dyeable resin and the crosslinkable component.
It is desirable to include the amount by weight. If the amount used is too small, the effect of improving light resistance is not sufficient, and if the amount is too large, the ultraviolet absorbent may bleed out to the surface of the image receiving layer,
The recorded image may be blurred over time.

Further, for the purpose of further improving the light resistance of the image receiving layer, a hindered amine light stabilizer may be contained.

Known hindered amine light stabilizers can be used. Specifically, for example, bis (2,2
2,6,6-Tetramethyl-4-piperidyl) sebacate (Sankyo SANOL LS770), bis (1,
2,2,6,6-pentamethyl-4-piperidyl) sebacate (Sankyo LS765), 1- {2
-[3- (3,5-Di-t-butyl-4-hydroxyphenyl) propionyloxy] ethyl} -4- [3-
(3,5-di-t-butyl-4-hydroxyphenyl)
Propionyloxy] -2,2,6,6-tetramethylpiperidine (Sankyo: SANOL LS2626), 4
-Benzoyloxy-2,2,6,6-tetramethylpiperidine (Sankyo: SANOL LS744), 8-acetyl-3-dodecyl-7,7,9,9-tetramethyl-1,3,8-triazaspiro [ 4, 5] Decane-2,
4-dione (manufactured by Sankyo: SANOL LS440), 2-
(3,5-di-t-butyl-4-hydroxybenzyl)
-2-n-butylmalonate bis (1,2,2,6,6-
Pentamethyl-4-piperidyl) (manufactured by Ciba Geigy: T
INUVIN 144), bis succinate (2, 2, 6,
6-Tetramethyl-4-piperidinyl) ester (manufactured by Ciba-Geigy: TINUVIN 780FF), polycondensate of dimethyl succinate and 1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-tetramethylpiperidine (Made by Ciba Geigy: TINUVIN 622L
D), poly {[6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl] [(2,2,6,6-tetramethyl- 4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]} (manufactured by Ciba Geigy: CHIMASSORB 944LD), N, N'-
Bis (3-aminopropyl) ethylenediamine and 2,4
-Bis [N-butyl-N- (1,2,2,6,6-pentamethyl-4-piperidyl) amino] -6-chloro-
Polycondensate of 1,3,5-triazine (Ciba Geigy:
CHIMASSORB 119FL), HA-70G
(Made by Sankyo), ADEKA STAB LA-52, ADEKA STAB
LA-57, ADEKA STAB LA-62, ADEKA STAB LA-67, ADEKA STAB LA-63, ADEKA STAB LA-68, ADEKA STAB LA-82, ADEKA STAB LA-87 (all manufactured by Asahi Denka Co., Ltd.) and the like can be mentioned.

These hindered amine light stabilizers are
Although they can be used alone or in combination of two or more, in consideration of the effect of improving light resistance, it is preferable to use them in combination with the above-mentioned ultraviolet absorber.

The amount of the hindered amine-based light stabilizer used is not particularly limited, but it is preferably contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the total of the dyeing resin and the crosslinkable component. If the amount used is too small, the light resistance improving effect is not sufficient, and conversely if the amount is too large, the hindered amine light stabilizer may bleed out to the surface of the image receiving layer, or the recorded image may be blurred over time. .

Further, the image receiving layer of the present invention preferably contains a releasing agent for the purpose of improving the releasability of the image receiving layer and the transfer sheet.

As the release agent, a silicone type surfactant,
Fluorine-based surfactants, graft polymers having a polyorganosiloxane as a trunk or a branch, compounds capable of forming a silicon-based or fluorine-containing crosslinked structure, such as a combination of amino-modified silicone and epoxy-modified silicone, and the like. The release agent can be used alone or in combination.

The amount of the release agent used is not particularly limited,
To 100 parts by weight of the total of the dyeable resin and the crosslinkable component,
It is desirable to contain 0.01 to 30 parts by weight.

Furthermore, the above resin composition may contain an inorganic filler such as silica, calcium carbonate, titanium oxide or zinc oxide depending on the purpose of use.

To produce the recording medium of the present invention, the resin composition is directly applied to the surface of the substrate by a coating method such as roll coating, bar coating or blade coating,
It is possible to form an image receiving layer.

Further, in order to improve the workability of the coating operation, a solvent capable of dissolving the resin composition, for example, a solvent such as ethyl alcohol, methyl ethyl ketone, toluene, ethyl acetate, dimethylformamide, tetrahydrofuran or the like is blended and suitable. It is preferable to adjust the coating viscosity.
Thereby, spray coating, curtain coating, flow coating, dip coating and the like can be easily performed.

When blending these solvents, it is necessary to volatilize and dry the solvent after coating the resin composition.

It is desirable that the image receiving layer is formed to have a film thickness of 0.5 to 100 μm, preferably 1 to 50 μm. If it is less than 0.5 μm, a high recording density cannot be obtained.

In the recording medium of the present invention, a layer such as an easily adhesive layer, an antistatic layer, a whiteness improving layer, or a composite layer combining these functions is provided between the image receiving layer and the substrate. May be.

Further, the recording medium of the present invention may be subjected to a treatment such as antistatic, contamination prevention, lubricity imparting, writing property imparting on the surface opposite to the image receiving layer.

[0052]

EXAMPLES The present invention will be described in more detail below with reference to examples.

Example 1 On one side of art paper (thickness 85 μm), a white polyester film (W900, thickness 38 μm, manufactured by Diafoil Co., Ltd.) was used, and on the other side, white polypropylene paper (made by Oji Yuka) : Yupo FPG, thickness 6
0 μm) was laminated to obtain a base material. As the adhesive, Toyo Morton AD-577-1 and CAT-52 were used.

On the white polyester film surface of the obtained base material, the following coating solution for image receiving layer was uniformly applied by a dipping method, the solvent was volatilized, and then ultraviolet rays were irradiated by a high pressure mercury lamp to give a film thickness of 5 An image receiving layer having a thickness of ˜6 μm was formed to obtain a recording medium.

Coating liquid for image-receiving layer Polyester resin obtained by polycondensation of terephthalic acid / isophthalic acid / ethylene glycol / neopentyl glycol (molecular weight 15,000 to 20,000, glass transition temperature 67 ° C.) 20 parts by weight terephthalic acid / isophthalic acid / sebacine Polyester resin obtained by polycondensing acid / ethylene glycol / neopentyl glycol / 1,4-butanediol (molecular weight 18,000 to 20,000, glass transition temperature 47 ° C.) 50 parts by weight Kayarad DPHA (manufactured by Nippon Kayaku) 15 parts by weight 2,2 -Bis (4-acryloyloxydiethoxyphenyl) propane 15 parts by weight 1-hydroxycyclohexylphenyl ketone 3 parts by weight Antioxidant represented by the structural formula (Asahi Denka Kogyo: Adekastab 517) 4.8 parts by weight Expression Compound (p-acetamidophenol) 1.3 parts by weight 2-hydroxy-4-octoxybenzophenone 4.8 parts by weight Bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate 4.8 parts by weight Parts Silicone surfactant represented by the following structural formula (4) 0.5 parts by weight Methyl ethyl ketone 500 parts by weight Toluene 100 parts by weight

[0056]

[Chemical 7]

However, (2l + m + 1) /mx=1.3 The obtained recording medium is a video printer NV manufactured by Matsushita Electric Industrial Co., Ltd.
-Kyocera thermal head (950Ω, 6 dots /
mm), recording voltage 13 V, pulse width 10 mse
Printing was performed under the condition of c. Then, the recorded image is a xenon long life fade meter (made by Suga Test Instruments: FAL
-25AX type) and exposed for 72 hours, and the color difference (ΔE) before and after the exposure was measured. The results are shown in Table 1.

Example 2 The same as Example 1 except that the amount of the phosphite antioxidant used was 6.5 parts by weight and the amount of the compound used was 1.6 parts by weight. A recording medium was obtained. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

Example 3 The same as Example 1 except that the amount of the phosphite antioxidant used was 8.0 parts by weight and the amount of the compound used was 2.0 parts by weight. A recording medium was obtained. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

(Example 4) In Example 1, instead of the phosphite-based antioxidant, the phosphite-based antioxidant represented by the above structural formula (JPP-manufactured by Johoku Chemical Industry Co., Ltd.)
613M) 6.8 parts by weight was used, and a recording medium was obtained in the same manner as in Example 1 except that the amount of the compound used was 0.6 parts by weight. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 1) A recording medium was obtained in the same manner as in Example 1 except that the phosphite antioxidant and the compound were not used. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 2) A recording medium was obtained in the same manner as in Example 1 except that the amount of the phosphite antioxidant used was 8.0 parts by weight and no compound was used. . ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 3) In Example 1, the phosphite-based antioxidant was not used and the amount of the compound used was 2.
A recording medium was obtained in the same manner as in Example 1 except that the amount was 0 parts by weight. The obtained recording medium was subjected to ΔE in the same manner as in Example 1.
Was measured. The results are shown in Table 1.

(Comparative Example 4) In Example 1, instead of the phosphite-based antioxidant, a phosphite-based antioxidant represented by the structural formula (JPP-61 manufactured by Johoku Chemical Industry Co., Ltd.).
A recording medium was obtained in the same manner as in Example 1 except that 8.0 parts by weight of 3M) was used and no compound was used. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

(Comparative Example 5) In Example 1, instead of the phosphite-based antioxidant, a phosphite-based antioxidant represented by the following structural formula (made by Sakai Chemical Industry: Chelex) was used.
-PC) 6.8 parts by weight, and the amount of the compound used was 0.
A recording medium was obtained in the same manner as in Example 1 except that 6 parts by weight was used. The obtained recording medium was subjected to ΔE in the same manner as in Example 1.
Was measured. The results are shown in Table 1.

[0066]

[Chemical 8]

(Comparative Example 6) In Example 1, instead of the phosphite-based antioxidant, a phosphite-based antioxidant represented by the following structural formula (Asahi Denka Kogyo: ADK STAB PEP-4C) 6.1 A recording medium was obtained in the same manner as in Example 1 except that the amount of the compound used was 0.6 part by weight. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

[0068]

[Chemical 9]

(Comparative Example 7) In Example 1, 9.7 parts by weight of a phosphite antioxidant represented by the following structural formula (Asahi Denka Kogyo: Adeka Stab 3010) was used instead of the phosphite antioxidant. A recording medium was obtained in the same manner as in Example 1 except that the amount of the compound used was 0.6 part by weight. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

[0070]

[Chemical 10]

(Comparative Example 8) In Example 1, instead of the phosphite-based antioxidant, a phosphite-based antioxidant represented by the following structural formula (made by Sakai Chemical Industry: Chelex) was used.
Recording medium was obtained in the same manner as in Example 1 except that 15.8 parts by weight of -OL) was used and the amount of the compound used was 0.6 parts by weight. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

[0072]

[Chemical 11]

(Comparative Example 9) In Example 1, instead of the phosphite-based antioxidant, a phosphite-based antioxidant represented by the following structural formula (made by Sakai Chemical Industry: Chelex) was used.
LT-3) was used in an amount of 11.9 and a recording medium was obtained in the same manner as in Example 1 except that the amount of the compound used was changed to 0.6 part by weight. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

[0074]

[Chemical 12]

Comparative Example 10 In Example 1, the amount of the phosphite-based antioxidant used was 8.0 parts by weight, and instead of the compound, a phenol-based antioxidant represented by the following structural formula (Asahi Denka Co., Ltd.) was used. Industrial: ADEKA STAB AO-50) 1
A recording medium was obtained in the same manner as in Example 1 except that 0.0 part by weight was used. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

[0076]

[Chemical 13]

Comparative Example 11 In Example 1, the amount of the phosphite-based antioxidant used was 8.0 parts by weight, and instead of the compound, a phenol-based antioxidant represented by the following structural formula (Sumitomo Chemical Industrial: Sumilizer GM-S)
A recording medium was obtained in the same manner as in Example 1 except that 7.4 parts by weight was used. ΔE of the obtained recording medium was measured in the same manner as in Example 1. The results are shown in Table 1.

[0078]

[Chemical 14]

[0079]

[Table 1]

[0080]

As described in detail above, according to the present invention,
By containing a plurality of compounds having a specific structure in the image-receiving layer, a sublimation-type thermal transfer recording system recording medium having excellent light resistance can be obtained. The image recorded on this recording medium has very little fading or discoloration due to light,
It will greatly contribute to the spread of video printers.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 25, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

[0023]

[Chemical 5]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiko Sukufu 20-1 Miyuki-cho, Otake-shi, Hiroshima Mitsubishi Rayon Co., Ltd. Central Research Laboratory (72) Inventor Akifumi Ueda 20-1 Miyuki-cho, Otake-shi, Hiroshima Mitsubishi Rayon Co., Ltd. Central Research Laboratory

Claims (1)

[Claims] 1. On the surface of a substrate, (a) at least one of phosphite antioxidants represented by the following general formula (1) or (2), and (b) a compound represented by the following general formula (3). An image-receiving layer made of a resin composition containing at least one of the above items, and a sublimation-type thermal transfer recording system recording medium. [Chemical 1] (However, in the general formulas (1) and (2), R ₁ and R ₂ are H, an alkyl group having 1 to 20 carbon atoms, R ₃ and R ₄ are alkyl groups having 1 to 20 carbon atoms, and A and B are H, an atomic group having 1 to 10 carbons as a main skeleton, and n = 1, 2, 3, and 4.) (However, R ₅ = alkyl group having 1 to 20 carbon atoms Z = substituted or unsubstituted phenylene group or naphthylene group.)