TWI634174B - Light curable resin composition for donor film and donor film - Google Patents

Abstract

The present invention provides a photocurable resin composition for a donor film, the glass transition temperature of the cured product is about 40 ° C to about 180 ° C, and the storage modulus at a temperature of about 25 ° C is about 3.5GPa to About 5.5GPa.

Description

Photocurable resin composition for donor film and donor film

The present invention relates to a photocurable resin composition for a donor film and a donor film.

At present, the development trend of display device technology is to develop a technology that uses less energy and has outstanding visibility. As a result, display devices utilizing organic light-emitting display devices (OLEDs) that are known to have less energy consumption than conventional light-emitting methods are being developed.

In order to realize a full color of a display device using such an organic light emitting display device, a method of patterning colors is particularly important for light emitting devices. As a result, the effect of determining the color of the light emitting device according to the formation is achieved. The method of the organic film layer of the organic light emitting display device varies. Methods for forming an organic film layer on an organic light-emitting display device include a vapor deposition method, an inkjet method, and a laser thermal transfer method (LITI).

In the case where an organic film layer composition containing an additive or a surfactant is applied to a substrate having a relatively low surface energy in order to form an organic film layer in an organic light-emitting display device, the wettability is not good, so there is a problem The problem is that the applicability becomes low. In addition, when a conventional thermal curing method is used in order to form an organic film layer in an organic light-emitting display device, there is a possibility that the organic film layer may be thermally damaged, and a phase difference of the organic film layer due to curing may occur later. The problem.

An embodiment of the present invention provides a photocurable resin composition for a donor film that is excellent in patterning reliability and transfer quality.

Another embodiment of the present invention provides a donor film including an intermediate layer formed of a photocurable resin composition for a donor film that is excellent in patterning reliability and transfer quality.

An embodiment of the present invention is to provide a photocurable resin for a donor film. The glass transition temperature of the cured product of the photocurable resin composition for a donor film may be about 40 ° C to about 180 ° C, and the storage modulus at a temperature of 25 ° C may be about 3.5GPa to about 5.5GPa.

In an embodiment of the present invention, the photocurable resin composition for a donor film may include: a photocurable compound including a material selected from the group consisting of urethane acrylate and epoxy acrylic acid. At least one of acrylate monomers and acrylates in the group consisting of epoxy acrylates, ester acrylates, cardo-based acrylates, and combinations thereof Oligomer-based, acrylate-based prepolymer, or a combination thereof; a crosslinkable acrylate-based monomer; and a photoinitiator.

In an embodiment of the present invention, an isocyanate monomer and a polyol are polymerized to form the urethane acrylate. The isocyanate compound may include an aliphatic isocyanate compound and an aromatic isocyanate compound. And at least one of them, the polyol may be a methacryl acid hydroxyalkyl ester compound.

In one embodiment of the present invention, the epoxy acrylate can include bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, and phenol novolac. At least one of a (meth) acrylic acid adduct of phenolnovolac epoxy resin and a combination thereof.

In one embodiment of the present invention, the ester acrylate can include a polyfunctional polyester acrylate-based compound of a polyol.

In an embodiment of the present invention, the shaft-joint acrylate may be a shaft-joint compound of the following Chemical Formula 1 and selected from the group consisting of a dianhydride compound, a diol compound, a diacrylic acid, and the like. At least one of the groups consisting of a combination of reacts to give a compound capable of photocuring an acrylate.

In the above chemical formula, R ¹ and R ^{2 are} each independently -OH, -NH ₂ , -O-CH ₂ -CH ₂ -OH, or -COOH.

In one embodiment of the present invention, the present invention may include about 30 to about 70 weight percent of the photocurable compound.

In one embodiment of the present invention, the present invention may include about 20 to about 60 weight percent of the crosslinkable acrylate monomer.

In an embodiment of the present invention, the crosslinkable acrylate monomer may be a monomer containing 2 to 4 acrylate functional groups.

In one embodiment of the present invention, the glass transition temperature (Tg) of the photocurable compound can be about -50 ° C to about 60 ° C.

In an embodiment of the present invention, after forming a polymer network structure cured by a photoinitiator, the glass transition temperature of the cured product is prepared from about 40 ° C to about 180 ° C.

In one embodiment of the present invention, the photocurable resin composition for a donor film may include an oligomer and a monomer having a weight average molecular weight of about 500 to about 20,000 and a content ratio of about 1: 4 to about 4: 1 photocurable compound.

In an embodiment of the present invention, the monomer may be a monomer containing an aliphatic group, and the oligomer may be an oligomer containing an aromatic group.

Another embodiment of the present invention is to provide a donor film including a substrate layer, a light-to-heat conversion layer, and an intermediate layer; the intermediate layer is a photo-curable resin for the donor film. A layer formed by curing the composition.

In one embodiment of the present invention, a transfer layer may be laminated on the upper portion of the intermediate layer.

In one embodiment of the present invention, the substrate film may include glass or be selected from polyester, polycarbonate, polyolefin, At least one transparent film in the group consisting of polyvinyl and combinations thereof.

In an embodiment of the present invention, the present invention may further include a primer layer formed on the substrate film.

In one embodiment of the present invention, the intermediate layer may have a surface energy of about 11 mN / m to about 21 mN / m.

This photocurable resin composition for a donor film is excellent in patterning reliability and transfer quality. As one of the factors determining the transfer quality of the patterning, the modulus of the intermediate layer is adjusted to cause thermal expansion to occur normally, and the glass transition temperature is adjusted to optimize the deformation and bulging of the intermediate layer under the condition of the thermal expansion temperature.

10‧‧‧ donor membrane

11‧‧‧ substrate layer

12‧‧‧ Light-to-heat conversion layer

13‧‧‧ middle layer

14‧‧‧ transfer layer

FIG. 1 is a schematic cross-sectional view of a donor film according to an embodiment of the present invention.

Hereinafter, examples of the present invention will be described in detail. However, this is only proposed as an example, and the present invention is not limited thereto, and the present invention is defined only according to the scope of patent application described later.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same or similar structural elements are marked with the same reference signs throughout the specification.

In the figure, in order to clearly express the plurality of layers and regions, the thickness is shown in an enlarged manner. In addition, in the drawings, for convenience of explanation, the thicknesses of some layers and regions are shown in an enlarged manner.

In the following, forming an arbitrary structure on the "upper (or lower)" or "upper (or lower)" of a substrate means that any structure is in contact with the upper surface (or lower surface) of the substrate The method is not limited to the case where other structures are not included between the above-mentioned substrate and any structure formed on (or below) the substrate.

In the photocurable resin composition for a donor film according to an embodiment of the present invention, the glass transition temperature of a cured product formed from the photocurable resin composition for a donor film The curing modulus of the photocurable resin composition for a donor film at a temperature of about 40 ° C. to about 180 ° C. at a temperature of about 25 ° C. may be about 3.5 GPa to about 5.5 GPa.

The photocurable resin composition for a donor film is a composition for forming an intermediate layer between a light-to-heat conversion layer and a transfer layer of the donor film, and the intermediate layer has a glass transition temperature and Store modulus characteristics.

Using a donor film including an intermediate layer formed from the photocurable resin composition for a donor film, when patterning is performed by laser thermal transfer, the transfer of organic substances on the transfer layer can be improved. performance.

In the donor film, after the organic substance is vapor-deposited to form a transfer layer, the vapor-deposited organic substance is transferred to a substrate to be transferred by laser patterning.

If the intermediate layer formed from the photocurable resin composition for a donor film has a glass transition temperature of less than about 40 ° C, there may be a problem that the stability of the film and the storage property are reduced under normal temperature conditions. The intermediate layer formed of the photocurable resin composition for a donor film has a glass transition temperature of greater than about 180 ° C. When laser thermal transfer is performed, the intermediate layer maintains a glassy state, so that A problem may arise in that the transfer performance is deteriorated.

On the other hand, if the intermediate layer cured by an ultraviolet (UV) curable resin composition for a donor film (that is, a photocurable resin composition for a donor film) has a storage mode of less than about 3.5 GPa When performing laser thermal transfer, organic matter transfer occurs even in areas that should not be patterned, so there may be a problem that the reliability of patterning is reduced. If the intermediate layer has a thickness greater than about 5.5 GPa When the modulus is stored, there may be a problem that it is difficult for the intermediate layer to thermally expand with the laser when the laser thermal transfer is performed.

Specifically, the photocurable resin composition for a donor film includes a photocurable compound including a photocurable compound selected from urethane acrylates, epoxy acrylates, and ester acrylates. , At least one of acrylate monomers, acrylate oligomers, acrylate prepolymers, or combinations thereof in the group consisting of shaft joint acrylates and combinations thereof, and The photocurable resin composition of the donor film may further contain additives such as a crosslinkable acrylate monomer and a photoinitiator.

The weight average molecular weight of the acrylate oligomer of the photocurable compound may be It is about 500 to about 20,000.

For example, in the photocurable resin composition for a donor film, as the photocurable compound, about 20 to about 60 weight percent of the acrylate-based oligomer as described above may be contained.

This urethane acrylate is a general term for a compound having a urethane bond and an acrylate group, which can be cured by ultraviolet rays by imparting an acrylate group to a urethane compound. The urethane bond can be formed by polymerization of an isocyanate monomer and a polyol. For example, the urethane acrylate photocurable oligomer includes an isocyanate compound and a hydroxyalkyl (meth) acrylate. The urethane bond formed by the reaction of the compound-like compound may be an oligomer formed by polymerization such that the weight average molecular weight is about 500 to about 20,000.

Specific examples of the isocyanate compound include aliphatic isocyanate compounds such as hexamethylene diisocyanate (HMDI, Hexamethylene diisocyanate), isophorone diisocyanate (IPDI, Isophorone diisocyanate), and toluene diisocyanate (TDI, Toluene). aromatic isocyanate compounds such as diisocyanate) and methylene diphenyl diisocyanate (MDI). These compounds can be used alone or in combination of two or more.

Specific examples of the hydroxyalkyl (meth) acrylate compound include 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate (2 -hydroxypropyl methacrylate), 4-hydroxybutyl methacrylate, 6-hydroxyhexyl methacrylate, 8-hydroxyoctyl (meth) acrylate Ester (8-hydroxyoctyl methacrylate), 2-hydroxyethylene glycol (meth) acrylate (2-hydroxy ethylene glycol methacrylate) or 2-hydroxy propylene glycol (meth) acrylate (2-hydroxy propylene glycol methacrylate), etc. Use a combination of these.

The epoxy acrylate is a compound that imparts an acrylate group to an epoxy-containing epoxy compound as a photocurable compound. Specific examples include bisphenol A diglycidyl ether and hydrogenated bisphenol A diglycidyl ether. Or an epoxy acrylate-based compound as a (meth) acrylic adduct of a phenol novolac epoxy resin.

The ester acrylate is a compound that imparts an acrylate group to the ester compound as a photocurable compound. As specific examples, it can be trimethylolpropane triacrylate, pentaerythritol tetraacrylate, or dipentaerythritol. Multifunctional polyester acrylates of polyhydric alcohols such as dipentaerythritol hexaacrylate.

The shaft-joint acrylate (or fluorene-based acrylate) as the photocurable compound may specifically be a shaft-joint compound of the following Chemical Formula 1 and selected from the group consisting of a diacid anhydride compound, a diol compound, a diacrylic acid, and the like. At least one of the group consisting of a combination of reacts to give a photocurable acrylate compound.

In the above chemical formula, R ¹ and R ^{2 are} each independently -OH, -NH ₂ , -O-CH ₂ -CH ₂ -OH, or -COOH.

The photocurable composition for a donor film may include about 30 to about 70 weight percent of the photocurable compound.

As the crosslinkable acrylate monomer, various monomers capable of photocuring can be used, and for example, a monomer containing 2 to 4 acrylate functional groups can be used. Specific examples of the crosslinkable acrylate monomer include 1,2-ethylene glycol diacrylate and 1,12-dodecanediol acrylate (1,12 -dodecanediol acrylate), 1,4-butanediol dimethacrylate (1,4-butanediol dimethacrylate), 1,6-hexandiol dimethacrylate (1,6-hexandiol dimethacrylate) , Neoopentyl glycol dimethacrylate, polyethylene glycol dimethacrylate, neopentyl glycol dimethacrylate (adipic acid) neopentylglycol adipate dimethacrylate), hydroxypivalate dimethacrylate Hydroxypivalate neopentylglycol dimethacrylate, dicyclopentenyl di (meth) acrylate, caprolactone modified dicyclopentenyl dimethacrylate , Ethylene oxide modified dimethacrylate, ethylene oxide modified dimethacrylate, dimethacryloxy ethyl isocyanurate, allyl cyclohexyl di (meth) acrylate (allylated cyclohexyl dimethacrylate), tricyclodecanedimethanol (meth) acrylate (tricyclodecanedimethanol methacrylate), dimethylol dicyclopentane di (meth) acrylate (dimethylol dicyclopentane dimethacrylate), ethylene oxide modified six Ethylene oxide modified hexahydrophthalic acid dimethacrylate, neoopentylglycol modified trimethylpropane dimethacrylate, adamantane di (meth) ) Adamantane dimethacrylate or 9,9-bis (4- (2-acrylic acid) Ethoxy) phenyl] fluorine (9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorine) and other difunctional acrylates; trimethylolpropane trimethacrylate, di Pentaerythritol tri (meth) acrylate (dipentaerythritol trimethacrylate), propionic acid modified dipentaerythritol tri (meth) acrylate (propionic acid modified dipentaerythritol trimethacrylate), pentaerythritol tri (meth) acrylate (pentaerythritol trimethacrylate), propylene oxide Modified trimethylolpropane tri (meth) acrylate, propylene oxide modified trimethylolpropane trimethacrylate, trifunctional urethane (meth) acrylate or trismethacryloxy ethyl isocyanurate ) And other trifunctional acrylates; diglycerin tetramethacrylate or pentaerythritol tetramethacrylate and other tetrafunctional acrylates; propionic acid-modified dipentaerythritol penta (meth) Acrylate (propionic acid modified dipentaerythritol pentamethacrylate) Pentafunctional acrylate; and dipentaerythritol hexamethacrylate, caprolactone modified dipentaerythritol hexamethacrylate, or urethane (meth) acrylate Esters (eg: isocyanate monomers and trimethylolpropane (Meth) acrylic ester reactant) and the like, but the present invention is not limited to this.

The photocurable resin composition for a donor film may include about 20 to about 60 weight percent of the crosslinkable acrylate monomer.

As an example of the photoinitiator, a material selected from the group consisting of benzoin methyl ether and 2,4,6-trimethylbenzoyldiphenylphosphine oxide (2,4,6-trimethyl benzoyl) diphenyl phosphine oxide), bis (2,4,6-trimethyl benzoyl) phenyl phosphine oxide, α, α-methoxy- α-Hydroxyacetophenone (α, α-methoxy-α-hydroxyacetophenone), 2-benzylmethyl-2- (dimethylamino) -1- [4- (4-morpholinyl) phenyl] -1 -Butanone (2-benzoyl-2- (dimethylamino) -1- [4- (4-morpholinyl) phenyl] -1-butanone), 2,2-dimethoxy-2-phenylacetophenone (2 , 2-dimethoxy-2-phenyl acetophenone), oxime esters and the like. The ultraviolet (UV) curable resin composition for a donor film may include about 0.1 to about 10 weight percent of the photoinitiator.

In order to make the cured product of the photocurable resin composition for a donor film have a glass transition temperature in the above-mentioned ranges and a storage modulus under normal temperature conditions, if a method is exemplarily proposed, it can be regarded as The glass transition temperature of the oligomer raw material prepared by the photocurable compound is limited to a range of about -50 ° C to about 60 ° C. After forming a polymer network structure cured by a photoinitiator, the cured product is cured. The glass transition temperature is from about 40 ° C to about 180 ° C.

In order to limit the glass transition temperature of the oligomer raw material, for example, in the case of a urethane acrylate oligomer, an isocyanate and a hydroxyalkyl (meth) acrylate can be made to contain an aromatic group to obtain a hard (hard) repeating unit, thereby increasing the glass transition temperature of the cured product.

In addition, in order for the photocurable resin composition for a donor film to have a storage modulus in the numerical range as described above, the type of the monomer constituting the repeat unit of the photocurable compound can be changed. , Molecular weight, content and so on. For example, if the repeating unit is composed of an aromatic which is a hard type, the storage modulus is increased. On the other hand, it is also possible to adjust the storage modulus by molecular weight. The longer the interval between the sites, the lower the crosslinking density, which results in a decrease in the storage modulus. In addition, by adjusting the content of an aliphatic group-containing monomer and an aromatic group-containing monomer, and adjusting the content of a structural element having a large molecular weight and a structural element having a small molecular weight, the photocuring for a donor film can be performed. The cured product of the curable resin composition achieves a storage modulus within the range described above.

In one embodiment, in the photocurable resin composition for a donor film, the content ratio of the oligomer and the monomer having a weight average molecular weight of about 500 to about 20,000 may be about 1: 4 to about 4 : 1. Specifically, the monomer may be an aliphatic group-containing monomer, and the oligomer may be an aromatic group-containing oligomer.

In another embodiment, an aliphatic-based monomer and an aromatic-based monomer can not be included at the same time.

In addition, the photocurable resin composition for a donor film may further be selected from the group consisting mainly of a crosslinking agent, an ultraviolet stabilizer, an antioxidant, a toner, and a reinforcing agent within a range that does not affect the effect of the invention. At least one additive in the group consisting of, filler, defoamer, surfactant, plasticizer, and combinations thereof.

In another embodiment of the present invention, a donor film including a substrate layer, a light-to-heat conversion layer, an intermediate layer, and a transfer layer is provided. The intermediate layer is formed by curing the photocurable resin composition for a donor film as described above.

When patterned by laser thermal transfer, the donor film can improve the performance of transferring the organic substance of the transfer layer.

Patterning is one of the factors that determines the quality of transfer. By adjusting the storage modulus of the intermediate layer formed from the photocurable resin composition for a donor film as described above, thermal expansion occurs normally, and vitrification is adjusted. The transition temperature is used to optimize the deformation and swelling of the intermediate layer under the conditions of thermal expansion temperature.

This donor film can be usefully used in the manufacture of display devices such as organic light-emitting display devices.

FIG. 1 is a cross-sectional view of the donor film 10. In FIG. 1, the donor film 10 includes a substrate layer 11, a light-to-heat conversion layer 12 formed on an upper portion of the substrate layer 11, and an intermediate layer 13 formed on an upper portion of the light-to-heat conversion layer 12.

As shown in FIG. 1, a transfer layer 14 can be formed on the intermediate layer 13.

The substrate film 11 may be glass or at least one transparent film selected from the group consisting of polyester, polycarbonate, polyolefin, polyethylene, and combinations thereof.

The base film 11 is specifically a polyethylene terephthalate (PET) film or a polyethylene naphthalate (PEN) film. Thermal stability and transparency are preferable.

In addition, the surface of the substrate film 11 is modified by using surface treatments such as corona, plasma, and the like that are well known to those skilled in the art to which the present invention pertains. In the case of the layer 12, the adhesion, the surface tension, and the like of the surface of the base film 11 can also be adjusted.

The donor film 10 may further include a primer layer (not shown) formed on the base film 11. For example, a primer layer can be formed between the base film 11 and the light-to-heat conversion layer 12.

This primer layer controls the temperature transfer between the layers adjacent to the substrate film, improves the adhesion between the layers adjacent to the substrate film 11, and controls the image transmission to the light-to-heat conversion layer 12 to form radiation. In the case where the primer layer is not formed, in the transfer process using a laser, the base film 11 and the light-to-heat conversion layer 12 may separate.

As a material suitable for such a primer layer, at least one selected from the group consisting of an acrylic resin, a urethane resin, a polyester resin, and a combination thereof can be used.

If the heat-resistant adhesion between the primer layer and the substrate film 11 or between the primer layer and the light-to-heat conversion layer 12 is poor, in a transfer process using laser, the substrate film 11 and the light-to-heat conversion layer 12 It is possible to separate.

The light-to-heat conversion layer 12 is a layer that absorbs light in the infrared-visible range and converts a part of the light into heat, and is composed of a resin composition containing a thermosetting resin and a light-to-heat conversion material.

The intermediate layer 13 can be coated with the photocurable resin composition for a donor film as described above, and is formed by thermal curing or photocuring. When the transfer layer is transferred by the heat generated by the light-to-heat conversion layer 12, the transfer layer is transferred. In this case, the intermediate layer 13 can be prevented from existing in the light-to-heat conversion layer 12 Part of the light-to-heat conversion substance is transferred together, and the phenomenon that the heat generated by the light-to-heat conversion layer 12 is transferred to the transfer layer and is thermally burnt is prevented. At the same time, as described above, the patterning reliability of the intermediate layer 13 is excellent.

Preferably, the intermediate layer 13 has a low surface energy. Since this intermediate layer 13 has a low surface energy, it has an advantage that it is easy to transfer an organic substance even if a small thermal expansion occurs.

Specifically, the surface energy of the intermediate layer 13 may be about 11 mN / m to about 21 mN / m.

For example, the intermediate layer 13 can be formed in a thickness of about 1 micrometer (μm) to about 5 μm. When the thickness of the intermediate layer 13 is less than about 1 μm, the heat generated by the light-to-heat conversion layer may damage the organic matter of the transfer layer. When the thickness of the intermediate layer 13 is more than about 5 μm, it may be insufficiently bulged, which may cause the The transfer performance deteriorates.

Typically, the transfer layer 14 includes one or more layers for transferring to a receptor. For example, it may be formed using organic, inorganic, organometallic, and other materials including an electroluminescent material or an electroactive material. Specifically, poly (phenylene vinylene), poly (p-phenylene), polyfluorene, polydialkylfluorene ( poly dialkyl fluorene, polythiophene, poly (9-vinylcarbazole), poly (N-vinylcarbazole) -vinyl alcohol) copolymer, triarylamine, polynorbonene, polyaniline, polyaryl polyamine, triphenylamine-polyetherketone, and the like.

In addition, the transfer layer 14 may further include at least one substance selected from a well-known light-emitting substance, a hole-transporting organic substance, and an electron-transporting organic substance so as to conform to the characteristics of the organic light-emitting device to be manufactured, and may further include A compound containing at least one of a non-luminescent low-molecular substance, a non-luminescent light-transporting polymer substance, and a curable organic binder substance.

Hereinafter, examples and comparative examples of the present invention will be described. The following embodiments belong to only one embodiment of the present invention, and the present invention is not limited by the following embodiments.

(Example)

Example 1

A photo-curable compound (weight-average molecular weight: 3000) of 50% by weight of a shaft-type acrylate having an aromatic group, 45% by weight of a difunctional acrylate monomer having an aliphatic group, and 5% by weight of a photoinitiator were prepared by mixing. Curable resin composition.

The measurement result of the glass transition temperature of this photocurable resin composition was 80 ° C.

A light-to-heat conversion layer containing a carbon black light-to-heat conversion material was formed on the polyester film base material layer to a thickness of 3 μm, and the prepared photocurable resin composition was applied to the upper part of the light-to-heat conversion layer with a thickness of 3 μm. A UV lamp was used to irradiate and cure the ultraviolet rays, thereby producing an intermediate layer and preparing a donor film.

The shaft-link type acrylate is a hard-type oligomer (molecular weight of 3000) having a hard structure in which aromatic five-membered rings and six-membered rings intersect. The composition containing the difunctional monomer in the above content ratio can achieve Storage modulus within the required range. The glass transition temperature and storage modulus of the manufactured intermediate layer were measured.

Example 2

The photocurable resin composition was produced by including 60% by weight of a urethane acrylate (weight average molecular weight: 5000) having an aromatic structure, 35% by weight of a difunctional acrylate monomer, and 5% by weight of a photoinitiator. Except for this, a donor film was prepared in the same manner as in Example 1.

Example 3

The photocurable resin composition was prepared by including 75% by weight of a urethane acrylate (weight average molecular weight: 6000) having an aromatic structure, 20% by weight of a difunctional acrylate monomer, and 5% by weight of a photoinitiator. Otherwise, a donor film was prepared in the same manner as in Example 1.

Comparative Example 1

The photocurable resin composition was prepared by including 80% by weight of a urethane acrylate (weight average molecular weight: 5000) having an aromatic structure, 15% by weight of a difunctional acrylate monomer, and 5% by weight of a photoinitiator. Otherwise, a donor film was prepared in the same manner as in Example 1.

Comparative Example 2

The photocurable resin composition was prepared by including 30% by weight of a urethane acrylate (weight average molecular weight: 5000) having an aromatic structure, 65% by weight of a difunctional acrylate monomer, and 5% by weight of a photoinitiator. Otherwise, a donor film was prepared in the same manner as in Example 1.

Comparative Example 3

The photocurable resin composition was produced by including 50% by weight of an epoxy acrylate (weight average molecular weight: 3000) having an aliphatic structure, 45% by weight of a trifunctional acrylate monomer, and 5% by weight of a photoinitiator. In addition, a donor film was prepared in the same manner as in Example 1.

Evaluation

The glass transition temperature and storage modulus of the intermediate layer of the donor film of Examples 1 to 3 and Comparative Examples 1 to 3 were evaluated as follows, and the results are shown in Table 1. In addition, the transfer characteristics of the donor films of Examples 1 to 3 and Comparative Examples 1 to 3 were evaluated as follows, and the evaluation results are shown in Table 1.

<Evaluation glass transition temperature>

Differential scanning calorimetry (Perkin Elmer DSC8000): The temperature was increased from 20 ° C to 200 ° C at a rate of 10 ° C / min.

<Evaluation storage modulus>

Nanoindentation: Hysitron TI750: Under normal temperature conditions, the nano-scale dynamic mechanical analysis mode (nanoDMA mode) was used to measure, and the storage modulus values were obtained.

<Evaluation of transfer quality>

The transfer quality was evaluated by the following methods:

1) Preparing a test pattern substrate: Prepare a test pattern substrate having a bank structure thickness of 0.5 μm or less and a taper angle of 15 ° or less. An organic substance DNTPD (N, N'-diphenyl-N, N'-bis- [4- (phenyl-m-) was deposited on a test pattern substrate with a pixel size of 11 × 78 μm in a thickness of 100Å. Tolyl-amino) -phenyl] -biphenyl-4,4'-diamine) (N, N'- diphenyl-N, N'-bis- [4- (phenyl-m-tolyl-amino) -phenyl] -biphenyl-4,4'-diamine).

2) TCTA ((N-oxazolyl) -triphenylamine, (N-carbazolyl)-) was deposited on the film surfaces prepared in Examples 1 to 3 and Comparative Examples 1 to 3 to a thickness of 500 Å. triphenylamine).

3) The DNTPD surface of the test pattern substrate and the TCTA surface of the films of Examples 1 to 3 and Comparative Examples 1 to 3 are fixed on a laser equipment stage by suction.

4) A mask is attached to the end of the laser equipment so that it can be imaged in alignment with the primitive area of the substrate.

5) The base material (polyethylene terephthalate surface) of the prepared sample was irradiated with a laser beam at an energy of 1.5 J / cm ² and scanned.

6) After scanning, after removing the donor film in Examples 1 to 3 and Comparative Examples 1 to 3, the organic substance transfer marks on the substrate surface were observed with an optical microscope and evaluated.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains may make various changes and modifications without departing from the spirit and scope of the present invention. Retouching, so the scope of protection of the present invention shall be determined by the scope of the attached patent application.

Claims (14)

A photocurable resin composition for a donor film, comprising: 30 to 70% by weight of an aromatic group-containing photocurable compound; 20 to 60% by weight of a crosslinkable acrylate monomer; and a photoinitiator Wherein: the glass transition temperature of the cured product of the photocurable resin composition is 40 ° C to 180 ° C; and the storage modulus of the cured product of the photocurable resin composition at 25 ° C is 3.5GPa to 5.5 GPa. The photocurable resin composition for a donor film according to item 1 of the patent application scope, wherein the photocurable compound comprises: selected from the group consisting mainly of urethane acrylates, epoxy acrylates, and esters At least one of an acrylate and a shaft joint acrylate, and the acrylate includes at least one of an acrylate monomer, an acrylate oligomer, and an acrylate prepolymer. The photocurable resin composition for a donor film according to item 2 of the patent application scope, wherein an isocyanate compound and a polyol are polymerized to form the urethane acrylate, and the isocyanate compound includes an aromatic compound. An isocyanate compound, and the polyol is a hydroxyalkyl (meth) acrylate compound. The photocurable resin composition for a donor film according to item 2 of the patent application range, wherein the epoxy acrylate comprises a (meth) acrylic acid adduct selected from bisphenol A diglycidyl ether, hydrogenated At least one of a (meth) acrylic adduct of bisphenol A diglycidyl ether and a (meth) acrylic adduct of a phenol novolac epoxy resin. The photocurable resin composition for a donor film according to item 2 of the scope of patent application, wherein the shaft joint acrylate is a shaft joint compound of the following Chemical Formula 1 and is selected from the group consisting of a diacid anhydride compound, At least one of the group consisting of an alcohol compound and diacrylic acid reacts to give a photocurable acrylate compound, In the above chemical formula, R ¹ and R ^{2 are} each independently -OH, -NH ₂ , -O-CH ₂ -CH ₂ -OH, or -COOH. The photocurable resin composition for a donor film according to item 1 of the scope of the patent application, wherein the crosslinkable acrylate monomer is a monomer containing 2 to 4 acrylate functional groups. The photocurable resin composition for a donor film according to item 1 of the patent application scope, wherein the photocurable compound has a glass transition temperature (Tg) of -50 ° C to 60 ° C. The photocurable resin composition for a donor film according to item 1 of the patent application range, wherein the photocurable compound includes a monomer and an oligomer having a weight average molecular weight of 500 to 20,000, and the oligomer The content ratio of this monomer is 1: 4 to 4: 1. The photocurable resin composition for a donor film according to item 8 of the scope of patent application, wherein the monomer is an aliphatic group-containing monomer, and the oligomer is an aromatic group-containing oligomer. A donor film includes: a substrate layer, a light-to-heat conversion layer, and an intermediate layer. The intermediate layer is a photocurable film for a donor film according to any one of claims 1 to 9 of the scope of patent application. A layer formed by curing a resin composition. The donor film according to claim 10, wherein a transfer layer is laminated on the upper portion of the intermediate layer. The donor film according to item 10 of the patent application scope, wherein the substrate layer comprises glass or is selected from the group consisting mainly of polyester, polycarbonate, polyolefin, polyethylene, and combinations thereof. At least one transparent film. The donor film according to item 10 of the patent application scope, further comprising a primer layer formed on the substrate layer. The donor film according to item 10 of the patent application scope, wherein the intermediate layer has a surface energy of 11 mN / m to 21 mN / m.