JP2641196B2 - Sublimation type thermal transfer recording system - Google Patents

Description

The present invention relates to a recording medium in a sublimation type thermal transfer recording system.

[Prior art] With the rapid spread of office automation in recent years, the color display of personal computers, word processors, office computers, etc., which are at the core, has increased rapidly, and the demand for practical use of a recording method from color signals has been rapidly increasing. There is also a strong demand for colorization in the field of dry copying machines.

Conventional color recording methods include a light pen method, a wire dot method, an ink jet method, and the like. However, these methods have disadvantages such as low recording speed, noise, and clogging of small nozzles from which ink is ejected. On the other hand, the sublimation type thermal transfer recording method is characterized in that no sound is generated, and the handling, maintenance and management of the copying machine are easy. In addition, since this method is a method in which a transfer sheet coated with a sublimable dye is heated by a thermal recording head to sublimate and transfer the dye to a recording medium to obtain color recording, the energy applied to the thermal head must be adjusted. This makes it possible to control the amount of dye sublimation, thereby facilitating gradation expression, and is particularly advantageous in obtaining a full-color hard copy as compared with other recording methods.

For this reason, JP-A-60-81359, JP-A-60-112493 and the like have proposed recording media which can be used in a sublimation type thermal transfer recording method, but these are articles which can be dyed with a sublimable cationic dye. And lacks stability to light.
For this reason, there has been a demand for the development of a recording medium that can be dyed with a sublimable disperse dye having good light resistance.

[Problems to be Solved by the Invention] An object of the present invention is to provide a dye sublimation type thermal transfer recording system which is easily dyed with a disperse dye under low energy conditions, and has excellent color developability and sharpness. It is to provide a recording medium.

As a result of intensive studies, the present inventors obtained a composition obtained by mixing a specific amount of a specific surfactant and a polyoxyalkylene resin in a specific ratio with a polyester resin and a crosslinking agent in a specific ratio and curing with an active energy ray. It has been found that the recording medium to be obtained is easily dyed with a sublimable disperse dye under low energy conditions and is dyed at a high density, thereby completing the present invention.

[Means for Solving the Problems] That is, the present invention relates to a method in which a polyester resin 40
~ 95% by weight and a crosslinking agent 60 curable by active energy rays
100 parts by weight of a mixture composed of a polyoxyalkylene derivative of polydimethylsiloxane, 0.01 to 10 parts by weight of a silicone surfactant having a polymerization degree of 5 to 5% by weight.
The above polyoxyalkylene derivatives 0.1 to 3 solid at room temperature
This is a sublimation type thermal transfer recording type recording medium obtained by coating a composition containing 0 parts by weight and curing with an active energy ray.

 Hereinafter, the present invention will be described in detail.

According to the present invention, the polyester resin used in the composition applied to the substrate surface is well dyed with a sublimable disperse dye, and has a function as a binder of the composition. belongs to.

As the polyester resin, a linear thermoplastic polyester resin obtained by polycondensation of a dicarboxylic acid and a diol or / and a polycondensation of an unsaturated polybasic acid having a reactive double bond with a polyhydric alcohol can be used. Unsaturated polyester resins are preferred. Above all, a linear thermoplastic polyester resin having a molecular weight of 2,000 to 40,000 obtained by condensation polymerization of two or more dicarboxylic acids and two or more diols and having a crystallinity of 1% or less is an organic solvent. It is more preferable from the viewpoints of solubility in water, ease of dyeing, and good light fastness.

The compounding amount of the polyester resin in the compounding amount with the crosslinking agent is 40
Preferably it is ~ 95% by weight. When the amount is less than 40% by weight, the dyeing concentration of the sublimable disperse dye does not become high under low energy conditions. Conversely, when the amount of the polyester resin exceeds 95% by weight, the amount of the crosslinking agent decreases, and the sublimable disperse dye is applied. As the non-blocking property with the color sheet (transfer paper) becomes poor, the article and the color sheet coated with the sublimable disperse dye easily dyeable composition and cured with active energy rays cause blocking (sticking) during thermal transfer. Become. More preferably, it is in the range of 55% by weight to 93% by weight.

Specific examples of the linear thermoplastic polyester resin obtained by condensation polymerization of two or more dicarboxylic acids and two or more diols include polyester resins obtained from terephthalic acid / isophthalic acid / ethylene glycol / neopentyl glycol. , Other terephthalic acid / isophthalic acid /
Ethylene glycol / bisphenol A-ethylene oxide adduct, terephthalic acid / isophthalic acid / ethylene glycol / 1,6-hexanediol, terephthalic acid / isophthalic acid / sebacic acid / ethylene glycol / neopentyl glycol, terephthalic acid / sebacic acid / ethylene glycol / Neopentyl glycol, terephthalic acid /
Examples include polyester resins obtained from isophthalic acid / adipic acid / ethylene glycol / neopentyl glycol. Two or more polyester resins can be used in combination. It should be noted that esterified dimethyl terephthalate, dimethyl isophthalate, or the like can be used as a raw material for polycondensation instead of terephthalic acid, isophthalic acid, or the like.

Unsaturated polyester resins obtained by polycondensation of an unsaturated polybasic acid having a reactive double bond with a polyhydric alcohol include maleic anhydride / phthalic anhydride / propylene glycol, maleic anhydride / isophthalic acid / Propylene glycol, maleic acid / fumaric acid / isophthalic acid / 1,3-butanediol, maleic acid / isophthalic acid /
Examples include resins obtained from neopentyl glycol, maleic anhydride / tetrahydrophthalic anhydride / dipropylene glycol, and the like.

The crosslinking agent is necessary for curing the composition to be coated with active energy rays and for obtaining the blocking resistance of the composition, and the preferred compounding amount is in the range of 5 to 60% by weight of the total amount with the polyester resin. And more preferably 7 to 45% by weight. If the amount of the cross-linking agent is less than 5% by weight, blocking tends to occur. Conversely, if the amount exceeds 60% by weight, the blocking resistance becomes poor, but the ratio of the polyester resin decreases, and a sufficient dyeing concentration is obtained. It becomes difficult.

Considering the curing of the composition by the cross-linking agent and the blocking resistance of the composition, the cross-linking agent preferably has at least one kind of polyfunctional monomer, and when ultraviolet rays which are easy to handle are used as active energy rays. Preferably, the polymerizable group of these crosslinking agents is a monomer having an acryloyloxy group or a methacryloyloxy group.

Examples of the monomer having a (meth) acryloyloxy group include polyether acrylate or polyether methacrylate (hereinafter, “acrylate or methacrylate” is simply abbreviated to “(meth) acrylate”), polyester (meth) acrylate, Polyol (meth) acrylate, epoxy (meth) acrylate, amidourethane (meth) acrylate,
Examples include monomers and oligomers such as urethane (meth) acrylate, spiroacetal (meth) acrylate, and polybutadiene (meth) acrylate.

Specific examples of such a monomer or oligomer include polyether (meth) acrylate synthesized from 1,2,6-hexanetriol / propylene oxide / acrylic acid, trimethylolpropane / propylene oxide / acrylic acid; adipic acid / 1 Polyester (meth) acrylate synthesized from 1,6-hexanediol / acrylic acid, succinic acid / trimethylolethane / acrylic acid; triethylene glycol diacrylate, hexapropylene glycol diacrylate, neopentyl glycol diacrylate, 1,4 -Butanediol dimethacrylate, 2-ethylhexyl acrylate, tetrahydrofurfuryl acrylate, 2-hydroxyethyl methacrylate, ethyl carbitol acrylate, trimethylolpropane tria Lylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, 2,2-bis (4-acryloyloxydiethoxyphenyl) propane, 2,2-bis (4-acryloyloxypropoxyphenyl) propane, etc. (Meta)
Acrylate or polyol (meth) acrylate; epoxy (meth) acrylate such as diglycidyl etherified bisphenol A / acrylic acid, diglycidyl etherified polybisphenol A / acrylic acid, triglycidyl etherified glycerin / acrylic acid; γ-butyrolactone / N -Methylethanolamine / bis (4-isocyanatocyclohexyl) methane / 2-hydroxyethyl acrylate, γ-butyrolactone / N-methylethanolamine / 2,6-tolylenediisocyanate / tetraethylene glycol / 2-hydroxyethyl acrylate, etc. Amido urethane (meth) acrylates; urethane acrylates such as 2,6-tolylene diisocyanate diacrylate, isophorone diisocyanate diacrylate, and hexamethylene diisocyanate diacrylate Spiro acetal acrylate synthesized from diarylidenepentaerythritol / 2-hydroxyethyl acrylate; acrylated polybutadiene synthesized from epoxidized butadiene / 2-hydroxyethyl acrylate; and these monomers and oligomers may be used alone or Used in a mixture of two or more.

Among the above monomers and oligomers, the following general formula (I) [In the formula, n is an integer of 1 to 4, and X is at least three general formulas: CH ₂ CHCH—COO—R ₈ — (wherein R ₈ is a single bond, having 1 to 8 carbon atoms. An alkylene group or a polyoxyalkylene group having an alkylene group having 1 to 8 carbon atoms), the remainder being 1 to 8 carbon atoms.
An alkyl group, a hydroxyl group, an amino group of the formula: — (OR ₉ ) _m −
A group represented by H (wherein R ₉ represents an alkylene group having 1 to 8 carbon atoms and m is a positive integer) or a formula represented by the formula:
(OR ₉ ) _m —OH (wherein R ₉ and m are as defined above). A compound represented by the following general formula (for example, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, tripentaerythritol pentaacrylate, tripentaerythritol hexaacrylate, tripentaerythritol heptaacrylate, etc.) II) (Wherein, n is a positive integer of 1 to 10, X is arbitrarily -OH or -OC
It is a OCH = CH _2. ) A polyacrylate of the polybisphenol A type, for example, diglycidyl etherified bisphenol A
Or diacrylate of Epicoat # 1001 (n = 3, manufactured by Shell Co.), or the following general formula (III) (Wherein, X ₁ , X ₂ ,..., X _n are the same or different alkylene groups having 6 or less carbon atoms or a structure in which one hydrogen atom is substituted with a hydroxyl group, and n is an integer of 0 to 5) For example, 2,2-bis (4-acryloyloxydiethoxyphenyl) propane, 2,2- (4-
Acryloyloxytriethoxyphenyl) propane,
2,2-bis (4-acryloyloxydipropoxyphenyl) propane and the like are particularly preferable crosslinking agents because they have a very good quick drying property in the air when ultraviolet rays are used as active energy rays.

The silicone-based surfactant and the fluorine-based surfactant are essential components to prevent blocking with a color sheet (transfer paper) when performing thermal transfer with low energy. That is, the result that the amount of the cross-linking agent of the present invention may be reduced in order to obtain the coloring by the sublimable disperse dye at a high concentration at a low energy has been obtained, but the blocking has come to appear remarkably. . However, it has been found that by adding a small amount of at least one selected from a specific silicone-based surfactant and a fluorine-based surfactant to this, the blocking is remarkably eliminated even if the amount of the crosslinking agent is small.

Among the silicone-based surfactants, compounds in which polydimethylsiloxane and polyoxyalkylene are blocked (may be slightly modified with other functional groups) are effective. In particular, CH ₃ − in the silicone-based surfactant is effective. (SiO)
The proportion of _{1 / 2} -group and -OR- group (R: alkylene residue) is CH ₃
-(SiO) _1/2 -/-OR- = 1/10 to 1 / 0.1 is preferable because it is excellent in blocking improving property and leveling improving property when the composition is used as a coating agent. In particular, it has been found that these silicone surfactants are also effective in improving the dyeing concentration and the transparency of the cured composition. When no silicone surfactant is added, the dyeing density is poor or the cured composition becomes cloudy white. Their preferred range is from 1/5 to 1 / 0.2.

Specific examples of the silicone surfactant include compounds represented by formulas (IV) and (V) (Where P is And m and n are positive integers of 1,2,3, ..., and x and y are
Represents the number 0,1,2,3,… Take a value that satisfies R ₁ represents —H, an alkyl group, an acyl group or an aryl group, an acetoxy group or the like. ) (Where Q is M and n are positive integers of 1,2,3, ..., x and y are numbers of 0,1,2,3, ..., z is 0 or an integer of 1 to 5, formula To be satisfied.

R ₂ -H, represents an alkyl group, an acyl group or an aryl group,
R ₃ represents —H, an alkyl group, an acyl group or an aryl group, an acetoxy group, or the like. ), And these can be used in combination of two or more.

By coating the composition described above on the basic surface and curing, it is possible to easily dye with a sublimable disperse dye, but in order to dye at a higher concentration, It has been found that 0.1 to 30 parts by weight of the polyoxyalkylene derivative (based on a total of 100 parts by weight of the polyester resin and the crosslinking agent) may be blended.

As for the polyoxyalkylene derivative, the degree of polymerization of the polyoxyalkylene group of the polyoxyalkylene derivative is 5 or more in consideration of prevention of bleed-out from the composition cured with active energy rays, and the polyoxyalkylene derivative is at room temperature. It is preferably a solid. For example, ethylene oxide adduct of bisphenol A, triester of ethylene oxide adduct of castor oil, triester of propylene oxide adduct of castor oil, triester of ethylene oxide adduct of trimethylolpropane, diester of polyethylene glycol, curing Solid products such as an ethylene oxide adduct of castor oil, a triester of a random adduct of ethylene oxide and propylene oxide of castor oil, and a diester of a propylene oxide adduct of adipic acid can be used.

Further, a compound having a degree of polymerization of a polyoxyalkylene group of the polyoxyalkylene derivative of 5 or more and having a polymerizable acryloyloxy group and / or methacryloyloxy group in a polyoxyalkylene derivative residue has a polymerization activity by ultraviolet rays. And is more preferable in that the polyoxyalkylene derivative is fixed in the composition to prevent bleeding. Examples of these compounds include polyethylene glycol monoacrylate, polyethylene glycol monomethacrylate, polyethylene glycol diacrylate, polypropylene glycol monoacrylate, polyethylene glycol dimethacrylate, and phenoxypolyethylene glycol acrylate.

These polyoxyalkylene derivatives can be used in combination of two or more, and the mixing ratio is as described above.
A range of 0.1 to 30 parts by weight is suitable, but preferably 0.2 to 30 parts by weight.
It is in the range of 20 parts by weight. If the amount is less than 0.1 part by weight, the effect of improving the dyeing density is small, and if it exceeds 30 parts by weight, these compounds may bleed on the surface or, on the contrary, lower the dyeing concentration.

When the composition of the present invention composed of the above components is used as a component of the cross-linking agent, such as tetrahydrofurfuryl acrylate, which has a high polymer solubility and a low viscosity, it can be used as a coating such as a roll coat, a bar coat, and a blade coat. Although it is possible, in order to improve the coating workability, these compositions in the solvent, for example, ethyl alcohol, methyl ethyl ketone, toluene, ethyl acetate,
It is better to mix dimethylformamide or the like and adjust the coating viscosity to an appropriate value. Thereby, curtain coating, flow coating, dip coating, and the like can be easily performed.

Further, depending on the purpose of using the above composition, fine inorganic fine particles of several μm or less, for example, silica, alumina, talc, titanium oxide and the like may be further blended.

The composition of the present invention is carried by an active energy ray such as an electron beam or an ultraviolet ray, but it is preferable to use an ultraviolet ray in consideration of the management of the radiation source. When ultraviolet rays are used as the active energy rays, the photopolymerization initiator is used in an amount of 0.1 to 100 parts by weight of the polyester resin and the crosslinking agent in the composition of the present invention in total.
It is preferable to add 10.0 parts by weight. Specific examples of the photopolymerization initiator include benzoin, benzoin isobutyl ether, benzyldimethyl ketal, ethylphenylglyoxylate, diethoxyacetophenone, 1,1-dichloroacetophenone, and 4'-isopropyl-2-hydroxy-2-methylpropio. Phenone, 1-hydroxycyclohexylphenyl ketone, benzophenone, benzophenone / diethanolamine, 4,4'-bisdimethylaminobenzophenone, 2-methylthioxanthone, te
carbonyl compounds such as rt-butylanthraquinone and benzyl; sulfur compounds such as tetramethylthiuram monosulfide and tetramethylthiuram disulfide; azo compounds such as azobisisobutyronitonyl and azobis-2,4-dimethylvaleronitrile; benzoyl peroxide And peroxide compounds such as di-tert-butyl peroxide. These compounds are used alone or in a mixture of two or more.

As a substrate for applying the above composition and irradiating an active energy ray to obtain a recording medium, a substrate in the form of a film or paper is suitable, and a polyester film, a polypropylene film, a nylon film, a vinyl chloride film, etc. Plastic film film; coated paper, baryta paper, art paper mainly made of wood fiber; paper-shaped paper such as acrylic paper, PP paper, polyester paper mainly made of plastic fiber, and transparency In consideration of polyester film, PP paper is suitable in consideration of good image quality.

These papers or films may be used as they are, and if necessary, may be used those subjected to pretreatment such as cleaning, etching, corona discharge, irradiation of active energy rays, dyeing, printing and the like. Good.

By the above-described coating method of the sublimable disperse dye dyeable composition on these substrates, the film thickness after curing is 0.5 to 100 μm.
m, preferably 1 to 50 μm.

If the film thickness is less than 0.5 μm, the diffusion of the dye reaches saturation on the way and it cannot be dyed dark. On the other hand,
If it exceeds 100 μm, blocking tends to occur during heating.

In addition, when stacking a dyed film or paper, it is better to apply the composition to only one side of the base material in order to prevent migration of the disperse dye, but to positively prevent migration of this dye It is more preferable to provide a non-migrating layer on the surface opposite to the coated surface of the dyeable dye sublimable dye composition.

As the composition for forming the non-migration layer, the above-mentioned polyfunctional monomer or / and a monomer comprising a monofunctional monomer, 100 parts by weight of an oligomer mixture and, if necessary, 0.1 to 100 parts by weight of the above-mentioned photopolymerization initiator. However, in order to sufficiently prevent transfer by a disperse dye, it is necessary that the polymerizable group of the monomer / oligomer mixture has an average of 1.5 or more polymerizable groups per molecule. These coating agents can also adjust the viscosity with a solvent, apply to a substrate, and cure as in the case of the dyeable sublimable disperse dye composition.

[Example] Hereinafter, an example of the present invention will be described in more detail. In the examples and comparative examples, all “parts” represent parts by weight.

Reference Example 1. Preparation of transfer sheet Kayaset Blue 136 on commercially available transfer paper with a thickness of 60 μm
A transfer sheet was prepared by uniformly applying a 5% trichloroethylene solution (manufactured by Nippon Kayaku).

REFERENCE EXAMPLE 2 Dry Heat Transfer Method Paper is spread on an ironing board, a recording medium is placed on the paper, and the transfer sheet created in Reference Example 1 is overlaid. Further, a commercially available paper having a thickness of 85 μm is placed thereon, and then heated at 145 ° C. × 10 seconds on a hot plate under a pressure of 1 kg / cm ² .

Reference Example 3. Evaluation of blocking resistance After the dry heat transfer of Reference Example 2, when the dyed article and the transfer sheet were peeled off, those that could be easily peeled off were expressed with a blocking resistance of "good", Those which were tacky and required some effort were designated as "poor".

Reference Example 4. Staining concentration measurement method A color analyzer (Hitachi 307
), The light transmittance T was measured for a transparent recording medium and calculated as -logT, and the reflectance R was measured for an opaque recording medium and calculated as -logR.

Examples 1 and 2; Comparative Examples 1 to 8 After mixing and adjusting the compositions shown in Table 1,
Thick transparent polyester film (Toray Le Miller part number
100, type S10) was uniformly coated by a flow coating method, and further irradiated with ultraviolet light from a 2 kW high-pressure mercury lamp in air to obtain a sublimable disperse dye-dyed recording material having a film thickness of 4 μm. Table I shows the results of evaluation of these articles according to Reference Examples 1 to 4. The adhesiveness of the cured composition to the polyester film was subjected to a peel test with a cellophane tape. As a result, the article of the present invention was good and did not peel.

PEO-DMA: polyethylene glycol (degree of polymerization: about 23) dimethacrylate 2P6A: dipentaerythritol hexaacrylate 2P5A: dipentaerythritol pentaacrylate 2P4A: dipentaerythritol tetraacrylate A-DEP: 2,2-bis (4-acryloyloxydiene) Ethoxyphenyl) propane Polyester resin A: Resin consisting of terephthalic acid / isophthalic acid / ethylene glycol / neopentyl glycol (molecular weight: 15,000 to 20000, Tg65 ° C) Silicone surfactant A: Example 3. 75 parts of polyester resin B, acrylic acid-added diacrylate of diglycidyl etherified bisphenol A 10
Parts, 2P6A 5 parts, 2P5A 5 parts, 2P4A 5 parts, castor oil ethylene oxide adduct triethyl ester 7 parts, silicone-based surfactant B 5 parts, photopolymerization initiator 2-hydroxy-2-methylpropiophenone 6 Parts, toluene 30
0 parts, a composition comprising 100 parts of methyl ethyl ketone is uniformly flow-coated on one side of PP paper, and then irradiated with ultraviolet light from a 2 kW high-pressure mercury lamp in air to obtain a recording medium having a composition layer of the present invention with a film thickness of 5 μm. I got When this was subjected to an experiment according to Reference Examples 1 to 4, dyeing was performed well without blocking, and a reflection optical density-logR = 0.85 was exhibited.

(Note) Polyester resin B: Resin consisting of terephthalic acid / sebacic acid / ethylene glycol / neopentyl glycol (molecular weight: 20,000-25,000, Tg 10 ° C) Silicone surfactant B: Example 4. Coated paper on one side of polyester resin C60, 2P6A5
Parts, 5 parts of 2P5A, 5 parts of 2P4A, 25 parts of 2,2-bis (4-acryloyloxydipropoxyphenyl) -propane,
8 parts of methoxypolyethylene glycol (degree of polymerization: about 20) acrylate, 4 parts of silicone surfactant C, 5 parts of 2-hydroxy-2-methylpropiophenone, 25 parts of ethyl acetate
A composition comprising 0 parts, 250 parts of methyl ethyl ketone, and 50 parts of silica (Aerosil R-972, manufactured by Nippon Aerosil) is uniformly coated by a blade coating method so as to have a thickness of 10 μm, and irradiated with ultraviolet rays in the air. It was cured. When this was subjected to dry heat transfer according to Reference Examples 1 to 4, the dye was well dyed without blocking, and the reflection optical density -lo
gR = 0.64 was shown.

(Note) Polyester resin C: resin consisting of terephthalic acid / isophthalic acid / sebacic acid / ethylene glycol / neopentyl glycol (molecular weight: 20,000 to 25,000, Tg 10 ° C) Silicone surfactant C: [Effect of the Invention] The recording medium for disperse dye dry transfer color formation of the present invention is easily dyed at a high concentration with a sublimable disperse dye, and has much better color developability and sharpness than conventional ones. In addition, it has excellent blocking resistance and high heat resistance, and can carry out dry transfer of a disperse dye under low energy of low temperature and short time. Therefore, the recording medium of the present invention is extremely useful, for example, as a material for dry transfer color development for color copying, electrophotography or information recording. In particular, the recording medium of the present invention using a transparent substrate is transparent. OH
For P, its industrial value is great.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-244696 (JP, A) JP-A-61-244589 (JP, A) JP-A-61-199997 (JP, A) JP-A-62-244 33684 (JP, A)

Claims (8)

(57) [Claims] 1. 100 parts by weight of a mixture comprising 40 to 95% by weight of a polyester resin and 60 to 5% by weight of a crosslinking agent curable by an active energy ray, and polyoxyalkylene-modified polydimethylsiloxane as a main component. A composition comprising 0.01 to 10 parts by weight of a silicone surfactant, which is a product, and 0.1 to 30 parts by weight of a polyoxyalkylene derivative fixed at room temperature having a degree of polymerization of 5 or more, and cured with active energy rays Sublimation type thermal transfer recording type recording medium obtained by 2. The recording medium according to claim 1, wherein the polyester resin is a linear thermoplastic polyester resin obtained by polycondensation of a dicarboxylic acid and a diol. 3. The recording medium according to claim 1, wherein the polyester resin is an unsaturated polyester resin obtained by polycondensation of an unsaturated polybasic acid having a reactive double bond with a polyhydric alcohol. body. 4. A patent wherein the linear thermoplastic polyester resin is a resin obtained by polycondensation of two or more dicarboxylic acids and two or more diols, and has a crystallinity of 1% or less. The recording medium according to claim 2. 5. The recording medium according to claim 1, wherein the crosslinking agent has at least one polyfunctional monomer. 6. The recording medium according to claim 1, wherein the polymerizable group of the crosslinking agent is a (meth) acryloyloxy group. The main component of 7. A silicone surfactant is a polyoxyalkylene-modified product of _{polydimethylsiloxane, CH 3 - (SiO) 1/2} - the ratio of the -OR- is CH ₃ - (SiO) _{1 / 2}
2. The recording medium according to claim 1, wherein-/-OR- = 1/10 to 1 / 0.1. 8. The recording medium according to claim 1, wherein the polyoxyalkylene derivative has at least one group selected from an acryloyloxy group and a methacryloyloxy group in the residue.