WO2020067291A1 - Transfer film, polarizing plate, image display device, and method for producing polarizing plate - Google Patents

Abstract

The present invention addresses the problem of providing: a transfer film that has excellent processing suitability as well as favorable transfer performance of a phase difference film; and a polarizing plate, an image display device, and a method for producing a polarizing plate. This transfer film has a provisional support, and a phase difference film provided on the provisional support so as to be separable, wherein: the phase difference film comprises a phase difference layer that is arranged, either directly or with an alignment film therebetween, on the provisional support; the phase difference layer is obtained by polymerizing a composition containing a liquid crystalline compound having a polymerizable group; and the phase difference layer meets both requirement 1 and requirement 2 if the phase difference layer is arranged directly on the provisional support, and the alignment film meets both requirement 1 and requirement 2 if the phase difference layer is arranged with the alignment film therebetween on the provisional support. Requirement 1: Layer obtained by polymerizing a composition containing a non-liquid crystalline compound that has a trifunctional or higher polymerizable group Requirement 2: Layer having a breakage/peeling load 0.4 N/25 mm or higher

Description

Transfer film, polarizing plate, image display device, and method of manufacturing polarizing plate

The present invention relates to a transfer film, a polarizing plate, an image display device, and a method for manufacturing a polarizing plate.

The retardation film is generally used as a viewing angle compensation film of a liquid crystal display device or an antireflection film of an organic electroluminescence (hereinafter abbreviated as “EL”) display device.
In recent years, with the spread of display devices, a retardation film used for the display device has been required to be thinner and more efficient in the manufacturing process.

In response to such a request, Patent Document 1 discloses a transfer film including a peelable support and an optical film releasably laminated on the peelable support, wherein the optical film is An optically anisotropic layer containing a liquid crystal compound, and comprising a non-thermoplastic acrylic resin layer adjacent to the optically anisotropic layer, the acrylic resin in the non-thermoplastic acrylic resin layer has a polyoxyalkylene chain The content of the polyoxyalkylene chain is 8 to 60% by mass relative to the total mass of the non-thermoplastic acrylic resin layer, and the thickness of the non-thermoplastic acrylic resin layer is 5 to 25 μm; A transfer film, wherein the thickness of the optically anisotropic layer is 0.1 to 10 μm, and the thickness of the non-thermoplastic acrylic resin layer is larger than the thickness of the optically anisotropic layer. " Item 1]).

International Publication No. WO 2014/178395

The present inventors examined Patent Document 1, and found that it was easy to peel off the temporary support (peelable support) and transfer the retardation film (optical film), but transfer the retardation film. It was clarified that there was a problem that the retardation film was peeled off from the temporary support when the transfer film itself was processed (for example, laminated on another film) in a pre-stage.

Accordingly, an object of the present invention is to provide a transfer film having excellent processability and good transferability of a retardation film, and a method for manufacturing a polarizing plate, an image display device, and a polarizing plate.

The present inventors have conducted intensive studies to achieve the above object, and as a result, in a transfer film having a temporary support and a retardation film, a retardation layer or an alignment film adjacent to the temporary support satisfies predetermined requirements. It has been found that a layer having excellent processability and a good transferability of the retardation film can be obtained as a transfer film, thereby completing the present invention.
That is, it has been found that the above-described object can be achieved by the following configuration.

[1] A transfer film having a temporary support and a phase difference film removably provided on the temporary support, wherein the phase difference film is disposed directly on the temporary support or via an alignment film. A retardation layer, the retardation layer is a layer obtained by polymerizing a composition containing a liquid crystalline compound having a polymerizable group,
When the retardation layer is disposed directly on the temporary support, the retardation layer satisfies both the following requirements 1 and 2,
When the retardation layer is disposed on the temporary support via an alignment film, the transfer film satisfies both of the following requirements 1 and 2.
Requirement 1: A layer obtained by polymerizing a composition containing a non-liquid crystalline compound having a polymerizable group having three or more functional groups Requirement 2: A layer having a breaking peel load of 0.4 N / 25 mm or more

[2] The transfer film according to [1], wherein the non-liquid crystal compound has a molecular weight of 150 or less per polymerizable group.
[3] The transfer film according to [1] or [2], wherein the non-liquid crystalline compound has a urethane bond in the molecule.
[4] The transfer film according to any one of [1] to [3], wherein a peel strength between the temporary support and the retardation film is 0.05 to 0.60 N / 25 mm.

[5] The retardation layer is directly disposed on the temporary support, and the retardation layer contains a liquid crystal compound having a polymerizable group and a non-liquid crystal compound having a tri- or more functional polymerizable group. The transfer film according to any one of [1] to [4], which is a layer obtained by polymerizing the composition to be formed.
[6] The transfer film according to [5], wherein the content of the non-liquid crystal compound is 6 parts by mass or more based on 100 parts by mass of the liquid crystal compound.
[7] The transfer film according to [5], wherein the content of the non-liquid crystal compound is more than 10 parts by mass and less than 30 parts by mass based on 100 parts by mass of the liquid crystal compound.
[8] The transfer film according to any one of [5] to [7], wherein the retardation layer has a structure in which a liquid crystalline compound and a non-liquid crystalline compound are copolymerized.
[9] The transfer film according to any one of [5] to [8], wherein the retardation layer satisfies the following requirement 3:
Requirement 3: The concentration of the liquid crystal compound at the interface between the retardation layer and the temporary support is 50% or less with respect to the concentration of the liquid crystal compound at the center in the thickness direction of the retardation layer. The transfer film according to any one of [1] to [4], wherein the transfer film is disposed on the temporary support via an alignment film, and the alignment film satisfies the following requirement 4.
Requirement 4: A layer obtained by polymerizing a composition containing a non-liquid crystal compound having a polymerizable group having three or more functional groups in an amount of 80% by mass or more based on the total mass of the solid content of the non-liquid crystal compound.

[11] [1] to [1] which further have another film, and the other film is bonded to the surface of the retardation film on the side opposite to the temporary support via an adhesive or an adhesive. 10] The transfer film according to any one of the above.

[12] A retardation film obtained by removing the temporary support from the transfer film according to any one of [1] to [10], and a polarizer, and the polarizer is provided on the surface of the retardation film with an adhesive. Or, a polarizing plate which is bonded via an adhesive.
[13] A laminate comprising a retardation film and another film obtained by removing the temporary support from the transfer film according to [11], and a polarizer, and the polarizer is provided with an adhesive on the surface of the other film. Or, a polarizing plate which is bonded via an adhesive.
[14] An image display device comprising the polarizing plate according to [12] or [13].

[15] A method for producing a polarizing plate for producing the polarizing plate according to [12], wherein the side opposite to the temporary support in the retardation film of the transfer film according to any one of [1] to [10]. The surface of the, a laminating step of laminating a polarizer via an adhesive or an adhesive, after the laminating step, peeling the temporary support, and a peeling step of producing a polarizing plate, Production method.
[16] A method for producing a polarizing plate according to [13], wherein the transfer film according to [11] has an adhesive or a pressure-sensitive adhesive on the surface of the transfer film opposite to the retardation film. A method for producing a polarizing plate, comprising: a laminating step of laminating a polarizer via an adhesive; and, after the laminating step, a peeling step of peeling a temporary support of the transfer film to produce a polarizing plate.

According to the present invention, it is possible to provide a transfer film having excellent processability and excellent transferability of a retardation film, and a method for manufacturing a polarizing plate, an image display device, and a polarizing plate.

FIG. 1A is a schematic sectional view showing an example of an embodiment of the transfer film of the present invention. FIG. 1B is a schematic sectional view showing an example of an embodiment of the transfer film of the present invention. FIG. 1C is a schematic sectional view showing an example of the embodiment of the transfer film of the present invention. FIG. 2 is a schematic sectional view showing an example of the embodiment of the transfer film of the present invention. FIG. 3 is a schematic sectional view showing an example of the embodiment of the polarizing plate of the present invention. FIG. 4 is a schematic sectional view showing an example of an embodiment of the polarizing plate of the present invention. FIG. 5 is a schematic cross-sectional view for explaining a method for measuring a breaking peeling load.

Hereinafter, the present invention will be described in detail.
The description of the components described below may be made based on typical embodiments of the present invention, but the present invention is not limited to such embodiments.
In addition, in this specification, a numerical range represented by using “to” means a range including numerical values described before and after “to” as a lower limit and an upper limit.
Further, in this specification, the terms parallel and orthogonal do not mean strictly parallel and orthogonal, but each mean a range of ± 5 ° from parallel or orthogonal.
Further, in the present specification, each component may use a substance corresponding to each component alone or in combination of two or more. Here, when two or more substances are used in combination for each component, the content of that component refers to the total content of the substances used in combination unless otherwise specified.
Further, in the present specification, “(meth) acrylate” is a notation meaning one of acrylate and methacrylate, and “(meth) acryl” is a notation meaning one of acryl and methacryl. "(Meth) acryloyl" is a notation meaning either acryloyl or methacryloyl.

[Transfer film]
The transfer film of the present invention is a transfer film having a temporary support and a retardation film removably provided on the temporary support.
Further, the transfer film of the present invention, the retardation film includes a retardation layer disposed directly on the temporary support or via an alignment film, and the retardation layer is a liquid crystal compound having a polymerizable group Is a layer obtained by polymerizing a composition containing
Further, in the transfer film of the present invention, when the retardation layer is directly disposed on the temporary support, that is, when the temporary support and the retardation layer are adjacent to each other, the retardation layer may have the following requirements 1 and In the case where the retardation layer is disposed on the temporary support via the alignment film, that is, when the temporary support and the alignment film are adjacent to each other, the alignment film must satisfy the following requirement 1. And a layer satisfying both requirements 2. In the present invention, when the retardation layer is disposed on the temporary support via an orientation film, the orientation film is included in the retardation film together with the retardation layer.
Requirement 1: A layer obtained by polymerizing a composition containing a non-liquid crystalline compound having a polymerizable group having three or more functional groups Requirement 2: A layer having a breaking peel load of 0.4 N / 25 mm or more

In the present invention, as described above, in a transfer film having a temporary support and a retardation film, a retardation layer adjacent to the temporary support (or an alignment film when the retardation film has an alignment film) [hereinafter, Also referred to as “adjacent layer”. However, if the layer satisfies both the above requirements 1 and 2, the transfer film has excellent processability and good transferability of the retardation film.
Although this is not clear in detail, the present inventors speculate as follows.
First, the present inventors examined the cause of poor processing suitability.If the transfer film was processed before the phase difference film was transferred, the transfer film was flawed in the transport process and the like, which triggered the flaw. It was thought that the cause was that unintended peeling proceeded.
Therefore, in the present invention, by causing the adjacent layer adjacent to the temporary support to be a layer that satisfies both the requirements 1 and 2 described above, scratches that cause peeling, that is, breakage are suppressed, and intentional It is considered that the processability before peeling (transferring) to the surface was improved.

1A to 1C show an example of an embodiment of the transfer film of the present invention.
A transfer film 10 shown in FIG. 1A includes a temporary support 1 and a retardation film 2 including a retardation layer (not shown).
Further, the transfer film 10 a shown in FIG. 1B has a temporary support 1 and a retardation layer 2 a as a retardation film 2.
Further, a transfer film 10b shown in FIG. 1C has a temporary support 1, an alignment film 2b as a retardation film 2, and a retardation layer 2a.
Hereinafter, requirements 1 and 2 that the transfer film of the present invention satisfies, and various members used for the transfer film of the present invention will be described in detail.

[Requirement 1]
In the transfer film of the invention, the adjacent layer adjacent to the temporary support is a layer obtained by polymerizing a composition containing a non-liquid crystalline compound having a polymerizable group having three or more functional groups.
Here, specific examples of the polymerizable group include a (meth) acryloyl group, a vinyl group, a styryl group, and an allyl group, and among them, a (meth) acryloyl group is preferable.

Examples of the non-liquid crystalline compound having a polymerizable group having three or more functional groups include a polyfunctional monomer having three or more polymerizable groups. Specifically, a polyhydric alcohol having three or more hydroxyl groups and (meth) ) Esters with acrylic acid, urethane (meth) acrylates and the like.

Specific examples of the esters include pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, and EO (ethylene oxide) -modified trimethylolpropane tri (meth) acrylate. ) Acrylate, PO (propylene oxide) -modified trimethylolpropane tri (meth) acrylate, EO-modified tri (meth) acrylate phosphate, trimethylolethanetri (meth) acrylate, ditrimethylolpropanetetra (meth) acrylate, dipentaerythritol tetra (Meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, pentaerythritol hexa (meth) Acrylate, caprolactone-modified dipentaerythritol preparative hexa (meth) acrylate, 1,2,3-cyclohexane tetramethacrylate, polyurethane polyacrylate, polyester polyacrylate, and caprolactone-modified tris (acryloyloxyethyl) isocyanurate.

As the esters, commercially available products can be used. Specific examples thereof include A-DPH (dipentaerythritol hexaacrylate) and A-TMMT (pentaerythritol tetraacrylate) (manufactured by Shin-Nakamura Chemical Co., Ltd.); SP327 (Manufactured by Osaka Organic Chemical Industry Co., Ltd.).

On the other hand, as the urethane (meth) acrylates, specifically, for example, a compound obtained by an addition reaction using a polyisocyanate compound and a hydroxyl group-containing (meth) acrylate compound; a polyalcohol compound and an isocyanate group-containing (meth) compound A compound obtained by an addition reaction using an acrylate compound; and the like.

Specific examples of the polyisocyanate compound include toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, tolylene diisocyanate, and 1,3-bis (isocyanatomethyl) cyclohexane.
In addition, specific examples of the hydroxyl group-containing (meth) acrylate compound include pentaerythritol triacrylate, dipentaerythritol pentaacrylate, 2-hydroxyethyl acrylate, and 2-hydroxyethyl methacrylate.

Specific examples of the polyalcohol compound include ethylene glycol, propylene glycol, glycerin, pentaerythritol, dipentaerythritol, trimethylolethane, and trimethylolpropane.
Further, specific examples of the isocyanate group-containing (meth) acrylate compound include 2-isocyanatoethyl acrylate and 2-isocyanatoethyl methacrylate.

As the urethane (meth) acrylate compound, commercially available products can be used, and specific examples thereof include Art Resin UN-3320HA, Art Resin UN-3320HC, Art Resin UN-3320HS, Art Resin manufactured by Negami Kogyo Co., Ltd. UN-904, purple light UV-1700B, purple light UV-7605B, purple light UV-7610B, purple light UV-7630B, purple light UV-7640B, manufactured by Nippon Synthetic Chemical Co., Ltd., NK Oligo U-, manufactured by Shin-Nakamura Chemical Co., Ltd. 6PA, NK Oligo U-10HA, NK Oligo U-10PA, NK Oligo U-1100H, NK Oligo U-15HA, NK Oligo U-53H, NK Oligo U-33H, KRM8452, EBECRYL1290 (manufactured by Daicel Ornex) Hereinafter, it is abbreviated as “EB1290”.), KRM82 0, EBECRYL5129, KRM8904, mention may be made of the UX-5000, etc. manufactured by Nippon Kayaku Co., Ltd..

In the present invention, the molecular weight per polymerizable group of the non-liquid crystalline compound is preferably 150 or less.
Here, when the polymerizable group is a (meth) acryloyl group, the “molecular weight per polymerizable group” means a so-called acrylic equivalent.

In the present invention, the non-liquid crystalline compound preferably has a urethane bond in the molecule, and more preferably the urethane (meth) acrylates described above.

[Requirement 2]
In the transfer film of the present invention, the adjacent layer adjacent to the temporary support is a layer having a breaking peel load of 0.4 N / 25 mm or more.
In the present specification, the breaking peeling load refers to a load (unit: N / 25 mm) measured by the following procedure.
As shown in FIG. 5, a transfer film 10 having a temporary support 1 and a retardation film 2 and triacetyl cellulose (corresponding to a corona treatment (output: 15 W · min / m ² , conveyance speed: 10 m / min) previously) ( TAC) substrate 8 and a roller laminating machine (laminating speed: 150 rpm / min, laminating pressure: 0.4 MPa) via an ultraviolet (UV) curable resin composition 7 prepared with the following composition. And paste.
Next, ultraviolet irradiation (150 mJ / cm ² ) is performed at room temperature (23 ° C.) to cure the UV-curable resin composition 7 to prepare a bonded film.
Next, the produced bonding film is cut into a width of 25 mm, and bonded to a glass substrate 6 with an adhesive (SK1478, manufactured by Soken Chemical Company) 5 interposed therebetween.
Next, when the TAC substrate 8 is pulled up at 10 mm / min in the 90 ° direction indicated by the arrow in FIG. 5, the load applied when the adjacent layer adjacent to the temporary support 1 breaks or peels off at the same time as the breakage, It is measured with a Tensilon universal material testing machine (manufactured by Orientec Co., Ltd.), and this is defined as a breaking peel load.
―――――――――――――――――――――――――――――――――
UV-curable resin composition ――――――――――――――――――――――――――――――――
・ 168 parts by mass of CEL2021P (manufactured by Daicel) ・ 11 parts by mass of CPI-100P (manufactured by San Apro) ・ 24 parts by mass of 2-ethylhexyl glycidyl ether ・ 1,4-cyclohexanedimethanol diglycidyl ether (DME-100, Shin Nihon) 48 parts by mass ――――――――――――――――――――――――――――――――

CEL2021P

CPI-100P

に お い て In the present invention, the adjacent layer adjacent to the temporary support is preferably a layer having a breaking peeling load of 0.4 to 1.5 N / 25 mm.

(Temporary support)
The temporary support of the transfer film of the present invention has a function as a support when forming a retardation layer or an alignment film, and is provided after the transfer film of the present invention is transferred (laminated) to a polarizer or the like. The temporary support is peeled off and removed.

The temporary support may be transparent or opaque, and its material is not particularly limited.
The temporary support may be a polymer film composed of a polymer. Examples of the polymer constituting the polymer film include cellulose polymers such as triacetyl cellulose (TAC), diacetyl cellulose, and cellulose acetate propionate; Acrylic polymer having an acrylate polymer such as methacrylate or lactone ring-containing polymer; thermoplastic norbornene-based polymer; polycarbonate-based polymer; polyester-based polymer such as polyethylene terephthalate or polyethylene naphthalate; polystyrene, acrylonitrile-styrene copolymer Styrene-based polymers such as (AS resin); polyolefin-based polymers such as polyethylene, polypropylene and ethylene-propylene copolymer; vinyl chloride-based polymers; Amide polymers such as styrene and aromatic polyamides; imide polymers; sulfone polymers; polyethersulfone polymers; polyetheretherketone polymers; polyphenylene sulfide polymers; vinylidene chloride polymers; vinyl alcohol polymers; Polymers; arylate polymers; polyoxymethylene polymers; epoxy polymers; and polymers obtained by mixing these polymers.
Among these, a cellulose-based polymer or a polyester-based polymer is preferable from the viewpoint of excellent releasability.

(4) The thickness of the temporary support is not particularly limited, but is preferably from 10 to 150 μm, more preferably from 20 to 100 μm, because the handleability of the transfer film is excellent.

(Retardation film)
The retardation film of the transfer film of the invention includes a retardation layer disposed directly on the temporary support or via an alignment film.

<Retardation layer>
The retardation layer is a layer obtained by polymerizing a composition containing a liquid crystal compound having a polymerizable group (hereinafter, also formally referred to as “the liquid crystal composition of the present invention”).

(Liquid crystal compound)
The liquid crystal compound contained in the liquid crystal composition of the present invention is not particularly limited as long as it has a polymerizable group, and a conventionally known liquid crystal compound can be used.
Here, specific examples of the polymerizable group include a (meth) acryloyl group, a vinyl group, a styryl group, and an allyl group, and among them, a (meth) acryloyl group is preferable.

In general, liquid crystal compounds can be classified into rod-shaped types and disc-shaped types based on their shapes. Furthermore, there are low molecular and high molecular types, respectively. A polymer generally refers to a polymer having a degree of polymerization of 100 or more (polymer physics / phase transition dynamics, Masao Doi, page 2, Iwanami Shoten, 1992).
In the present invention, any liquid crystal compound can be used, but it is preferable to use a rod-shaped liquid crystal compound or a discotic liquid crystal compound (a discotic liquid crystal compound). Two or more rod-shaped liquid crystal compounds, two or more disc-shaped liquid crystal compounds, or a mixture of a rod-shaped liquid crystal compound and a disc-shaped liquid crystal compound may be used.
Further, from the viewpoint of fixing the alignment, the liquid crystal compound preferably has two or more polymerizable groups described above. When the liquid crystal compound is a mixture of two or more kinds, it is preferable that at least one kind of the liquid crystal compound has two or more polymerizable groups in one molecule.
As the rod-like liquid crystalline compound, for example, those described in claim 1 of Japanese Patent Application Laid-Open No. 11-513019 or paragraphs [0026] to [0098] of JP-A-2005-289980 can be preferably used. As the tick liquid crystalline compound, for example, those described in paragraphs [0020] to [0067] of JP-A-2007-108732 and paragraphs [0013] to [0108] of JP-A-2010-244038 are preferably used. But not limited to these.

In the present invention, it is preferable to use a rod-shaped liquid crystal compound as the liquid crystal compound, for example, azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic esters, cyclohexanecarboxylic acid phenyl esters, cyano Phenylcyclohexanes, cyano-substituted phenylpyrimidines, alkoxy-substituted phenylpyrimidines, phenyldioxane, tolanes and alkenylcyclohexylbenzonitrile are preferably used.

<Onium salt compound>
The liquid crystal composition of the present invention preferably contains an onium salt compound.
As the onium salt compound, an onium compound known as a vertical alignment agent can be used. Specific examples include the compounds described in paragraphs [0042] to [0052] of JP-A-2016-105127.
When the onium salt compound is contained, the content is preferably 0.5 to 5 parts by mass, more preferably 1 to 3 parts by mass, per 100 parts by mass of the above-mentioned liquid crystalline compound.

<Polymerization initiator>
The liquid crystal composition of the present invention preferably contains a polymerization initiator.
The polymerization initiator used is preferably a photopolymerization initiator capable of initiating a polymerization reaction by ultraviolet irradiation.
Examples of the photopolymerization initiator include α-carbonyl compounds (described in US Pat. Nos. 2,367,661 and 2,367,670), acyloin ethers (described in US Pat. No. 2,448,828), and α-hydrocarbon-substituted aromatics Group acyloin compounds (described in US Pat. No. 2,722,512), polynuclear quinone compounds (described in US Pat. Nos. 3,046,127 and 2,951,758), and a combination of triarylimidazole dimer and p-aminophenyl ketone (US Pat. No. 3549367), acridine and phenazine compounds (JP-A-60-105667, US Pat. No. 4,239,850) and oxadiazole compounds (US Pat. No. 4,221,970), acylphosphines Oxide compounds JP-A-3-40799, JP-B-5-29234, JP-A-10-95788, JP-A-10-29997) and the like.

<Surfactant>
The liquid crystal composition of the present invention may contain a surfactant in view of the uniformity of the coating film and the strength of the retardation layer.
Examples of the surfactant include conventionally known compounds, and a fluorine compound is particularly preferable. Specifically, for example, compounds described in paragraphs [0028] to [0056] of JP-A-2001-330725 and paragraphs [0069] to [0126] of Japanese Patent Application No. 2003-295212 are described. Described compounds.

<Solvent>
The liquid crystal composition of the present invention preferably contains a solvent from the viewpoint of workability for forming a retardation layer and the like.
As the solvent, specifically, for example, ketones (eg, acetone, 2-butanone, methyl isobutyl ketone, cyclohexanone, etc.), ethers (eg, dioxane, tetrahydrofuran, etc.), aliphatic hydrocarbons (eg, hexane) ), Alicyclic hydrocarbons (eg, cyclohexane, etc.), aromatic hydrocarbons (eg, toluene, xylene, trimethylbenzene, etc.), halogenated carbons (eg, dichloromethane, dichloroethane, dichlorobenzene, chlorotoluene, etc.) ), Esters (eg, methyl acetate, ethyl acetate, butyl acetate, etc.), water, alcohols (eg, ethanol, isopropanol, butanol, cyclohexanol, etc.), cellosolves (eg, methyl cellosolve, ethyl cellosolve, etc.), cello Examples include rubuacetates, sulfoxides (eg, dimethylsulfoxide), amides (eg, dimethylformamide, dimethylacetamide, etc.), and these may be used alone or in combination of two or more. Good.

In the present invention, it is preferable that the retardation layer is directly disposed on the temporary support.
Therefore, the liquid crystal composition of the present invention is preferably a composition containing a liquid crystal compound having a polymerizable group and the above-mentioned non-liquid crystal compound having a polymerizable group having three or more functional groups.
In this case, the content of the above-described non-liquid crystalline compound having a polymerizable group having three or more functional groups is preferably 6 parts by weight or more, and more preferably 10 parts by weight with respect to 100 parts by weight of the liquid crystalline compound having a polymerizable group. More preferably, it is less than 30 parts by mass.
Further, the retardation layer preferably has a structure in which a liquid crystal compound having a polymerizable group and the above-mentioned non-liquid crystal compound having a polymerizable group having three or more functional groups are copolymerized.

When the retardation layer is directly disposed on the temporary support, the retardation layer preferably satisfies the following requirement 3.
Requirement 3: The concentration of the liquid crystal compound at the interface between the retardation layer and the temporary support is 50% or less of the concentration of the liquid crystal compound at the center of the retardation layer in the thickness direction.

In this specification, the concentration of the liquid crystal compound in the requirement 3 means a value calculated by the following method.
After peeling the retardation layer from the temporary support, the phase difference facing the temporary support was measured using Time-of-Flight Secondary Ion Mass Spectrometry (TOF-SIMS). The secondary ion intensity of the surface of the layer is measured, and then the surface of the measurement surface is etched using a sputter gun, and the secondary ion intensity of the etched surface is measured.
Thereafter, a cycle of etching and measurement of the secondary ion intensity is repeated until the phase difference layer disappears, and a distribution (mapping) of the secondary ion intensity is created.
The secondary ion intensity on the surface of the retardation layer facing the temporary support is defined as the concentration of the liquid crystal compound at the interface between the retardation layer and the temporary support, and is half the number of times of sputtering required until the retardation layer disappeared. Is the concentration of the liquid crystal compound at the center of the retardation layer in the thickness direction.
Then, the ratio of the concentration of the liquid crystal compound at the interface between the phase difference layer and the temporary support to the concentration of the liquid crystal compound at the center in the thickness direction of the phase difference layer is calculated.
The TOF-SIMS measurement is carried out in a high-mass resolution mode, a measurement range of 100 mm ² , and a total of 5 times / cycle, using a TRIF V nanoTOF (trade name) manufactured by ULVAC-PHI. A low-speed electron gun is used for charge correction, and Ar-GCIB (Ar 2500+, 20 kV, ² nA) is used for etching at 500 mm ² , 5 s / cycle.

In the present invention, the concentration of the liquid crystal compound at the temporary support interface of the retardation layer is more preferably 30% or less with respect to the concentration of the liquid crystal compound at the center in the thickness direction of the retardation layer. %, More preferably 15% or less.

In the present invention, as a method of forming a retardation layer, for example, after applying the liquid crystal composition of the present invention on the temporary support or an alignment film described below to obtain a desired alignment state, by polymerization An immobilization method and the like can be mentioned.
Examples of the method for applying the liquid crystal composition include a wire bar coating method, an extrusion coating method, a direct gravure coating method, a reverse gravure coating method, and a die coating method.
The polymerization conditions are not particularly limited, but it is preferable to use ultraviolet rays in the polymerization by light irradiation. The irradiation amount is preferably from 10 mJ / cm ² to 50 J / cm ² , more preferably from 20 mJ / cm ² to 5 J / cm ² , even more preferably from 30 mJ / cm ² to 3 J / cm ^2. , 50 to 1000 mJ / cm ² . Further, in order to accelerate the polymerization reaction, the reaction may be carried out under heating conditions.

厚 The thickness (film thickness) of the retardation layer is not particularly limited, but is preferably from 0.1 to 10 µm, more preferably from 0.5 to 5 µm.

<Orientation film>
The alignment film is a layer arbitrarily disposed on the temporary support described above, and in the present invention, is a layer obtained by polymerizing a composition containing a non-liquid crystal compound having a polymerizable group having three or more functional groups. is there.
Here, as a component other than the non-liquid crystalline compound having a polymerizable group having three or more functional groups contained in the composition, a polymer material known as a general alignment film material may be mentioned, and specifically, Examples thereof include polyvinyl alcohol, polyimide, and derivatives thereof.
As the components other than the non-liquid crystal compound having a polymerizable group having three or more functional groups contained in the composition, the polymerization initiator, the solvent, and the like described in the above-described liquid crystal composition of the present invention can be used.
Further, examples of a method for forming an alignment film include a method in which the crystal composition is applied to the temporary support described above and fixed by polymerization.
Examples of the method for applying the composition include a wire bar coating method, an extrusion coating method, a direct gravure coating method, a reverse gravure coating method, and a die coating method.

The thickness of the alignment film is not particularly limited, but is preferably from 0.01 to 10 μm from the viewpoint of relaxing a surface unevenness that may be present on the temporary support and forming a retardation layer having a uniform thickness. The thickness is more preferably from 0.5 to 5 μm, even more preferably from 1.5 to 3 μm.

In the present invention, the alignment film preferably satisfies the following requirement 4.
Requirement 4: A layer obtained by polymerizing a composition containing a non-liquid crystal compound having a polymerizable group having three or more functional groups in an amount of 80% by mass or more based on the total mass of the solid content of the non-liquid crystal compound.

The non-liquid crystalline compound having a polymerizable group having three or more functional groups is more preferably 90% by mass or more, and more preferably 95% by mass or more based on the total mass of the solid content of the non-liquid crystalline compound contained in the composition. It is even more preferred.

In the present invention, the peel strength between the temporary support and the retardation film is preferably 0.05 to 0.60 N / 25 mm, and 0.10 to 0. More preferably, it is 20 N / 25 mm.
In this specification, the peel strength refers to a load value (unit: N / 25 mm) measured by the following procedure.
First, after the transfer film is cut into 150 mm × 25 mm, the surface of the retardation film opposite to the temporary support is bonded to a glass substrate via an adhesive (SK1478, manufactured by Soken Chemical Co., Ltd.). At this time, only the 80 mm × 25 mm portion is bonded to the glass substrate.
Next, a portion of the transfer film that is not bonded to the glass substrate and the glass substrate are gripped, and a load value when the temporary support is peeled off by applying a force in a 180 ° direction to these portions is used to measure the load value when using a Tensilon Universal Material Testing Machine (Oriental Corporation). (Manufactured by KK).

[Other films]
In the transfer film of the present invention, another film may be bonded to the surface of the retardation film on the side opposite to the temporary support via an adhesive or an adhesive.
FIG. 2 shows an example of an embodiment of the transfer film of the present invention having another film.
The transfer film 20 shown in FIG. 2 has a temporary support 1, a retardation film 2, and another film 3.

The other films are not particularly limited, and include, for example, the polymer films exemplified as the temporary support described above and films in which a liquid crystal compound is horizontally aligned, and these may be used alone. More than one kind may be used together (laminated).
In particular, a film in which a liquid crystal compound is horizontally aligned preferably has a λ / 4 function.
Here, the “λ / 4 function” refers to a function of converting linearly polarized light having a specific wavelength into circularly polarized light (or converting circularly polarized light into linearly polarized light).

The thickness of the other film is not particularly limited, but is preferably 5 to 60 μm, more preferably 5 to 30 μm.

The pressure-sensitive adhesive or adhesive used for lamination with another film is not particularly limited, but after lamination, the change in the adhesive force (adhesive force) is small even after a certain period of time, and can be peeled off as necessary. For this reason, it is preferable to use an adhesive for bonding.
Examples of the adhesive include a rubber-based adhesive, a (meth) acrylic-based adhesive, a silicone-based adhesive, a urethane-based adhesive, a vinylalkyl ether-based adhesive, a polyvinyl alcohol-based adhesive, a polyvinylpyrrolidone-based adhesive, and a poly (adhesive). An acrylamide-based pressure-sensitive adhesive, a cellulose-based pressure-sensitive adhesive, and the like can be given.
Among these, an acrylic pressure-sensitive adhesive (pressure-sensitive pressure-sensitive adhesive) is preferable from the viewpoints of transparency, weather resistance, heat resistance and the like.

[Polarizer]
The polarizing plate of the present invention has a retardation film obtained by peeling the temporary support from the above-described transfer film of the present invention, and a polarizer, and the polarizer has a pressure-sensitive adhesive or an adhesive on the surface of the retardation film. It is a polarizing plate that is bonded through the intermediary.
Further, the polarizing plate of the present invention, when the above-described transfer film of the present invention has another film, a laminate of a retardation film and another film obtained by peeling the temporary support from the transfer film, and a polarizer And a polarizing plate comprising a polarizer bonded to the surface of another film via an adhesive or an adhesive.
3 and 4 show an example of an embodiment of the polarizing plate of the present invention.
The polarizing plate 30 illustrated in FIG. 3 includes the retardation film 2 and the polarizer 4.
The polarizing plate 40 shown in FIG. 4 includes the retardation film 2, another film 3, and the polarizer 4.

(Polarizer)
The polarizer included in the polarizing plate of the present invention is not particularly limited as long as it has a function of converting light into specific linearly polarized light, and a conventionally known absorption polarizer and reflection polarizer can be used. .
As the absorption polarizer, an iodine-based polarizer, a dye-based polarizer using a dichroic dye, a polyene-based polarizer, and the like are used. Iodine-based polarizers and dye-based polarizers include coating polarizers and stretched polarizers, both of which can be applied.Polarized light produced by adsorbing iodine or a dichroic dye on polyvinyl alcohol and stretching. Children are preferred.
Further, as a method of obtaining a polarizer by performing stretching and dyeing in a state of a laminated film having a polyvinyl alcohol layer formed on a substrate, Japanese Patent No. 5048120, Japanese Patent No. 5143918, Japanese Patent No. 5048120, Japanese Patent No. 4691205, Japanese Patent No. 4751481, and Japanese Patent No. 4751486 can be cited, and known techniques relating to these polarizers can also be preferably used.
As the reflective polarizer, a polarizer obtained by laminating thin films having different birefringence, a wire grid polarizer, a polarizer combining a cholesteric liquid crystal having a selective reflection region and a λ / 4 plate, and the like are used.
Among them, polyvinyl alcohol-based resins (polymers containing —CH ₂ —CHOH— as a repeating unit. In particular, at least one selected from the group consisting of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, in terms of better adhesion. Is preferable.

厚 み The thickness of the polarizer is not particularly limited, but is preferably 3 to 60 μm, more preferably 5 to 30 μm, and still more preferably 5 to 15 μm.

粘着 Examples of the pressure-sensitive adhesive or adhesive used for laminating the polarizer include the same as those described for laminating other films described above.

The method for producing the polarizing plate of the present invention is not particularly limited. For example, in the case of producing the polarizing plate of the embodiment shown in FIG. 3, the surface on the side opposite to the temporary support in the retardation film of the transfer film is formed. A method including a bonding step of bonding a polarizer via a pressure-sensitive adhesive or an adhesive, and a peeling step of peeling a temporary support after the bonding step to produce a polarizing plate is preferably exemplified.
In the case where the polarizing plate of the embodiment shown in FIG. 4 is manufactured, a polarizer is bonded to the surface of the other film of the transfer film on the side opposite to the retardation film via an adhesive or an adhesive. A method including a bonding step and a peeling step of peeling the temporary support of the transfer film after the bonding step to produce a polarizing plate is preferably exemplified.

[Image display device]
The image display device of the present invention is an image display device having the above-described polarizing plate of the present invention.
The display element used in the image display device of the present invention is not particularly limited, and examples thereof include a liquid crystal cell, an organic EL display panel, and a plasma display panel.
Among them, a liquid crystal cell and an organic EL display panel are preferable. That is, the image display device of the present invention is preferably a liquid crystal display device using a liquid crystal cell as a display element, or an organic EL display device using an organic EL display panel as a display element.

(Liquid crystal display)
A liquid crystal display device as an example of the image display device of the present invention is a liquid crystal display device including the above-described polarizing plate of the present invention and a liquid crystal cell.
In the present invention, among the polarizing plates provided on both sides of the liquid crystal cell, it is preferable to use the polarizing plate of the present invention as the front polarizing plate, and the polarizing plate of the present invention as the front and rear polarizing plates. It is more preferable to use
Hereinafter, the liquid crystal cell constituting the liquid crystal display device will be described in detail.

<Liquid crystal cell>
The liquid crystal cell used in the liquid crystal display device is preferably a VA (Vertical Alignment) mode, an OCB (Optically Compensated Bend) mode, an IPS (In-Plane-Switching) mode, or a TN (Twisted Nematic). However, the present invention is not limited to this.
In the TN mode liquid crystal cell, the rod-like liquid crystalline molecules are substantially horizontally aligned when no voltage is applied, and further twist-aligned at 60 to 120 °. TN mode liquid crystal cells are most frequently used as color TFT liquid crystal display devices, and are described in many documents.
In a VA mode liquid crystal cell, rod-like liquid crystalline molecules are substantially vertically aligned when no voltage is applied. The VA mode liquid crystal cell includes (1) a VA mode liquid crystal cell in a narrow sense in which rod-like liquid crystal molecules are aligned substantially vertically when no voltage is applied and substantially horizontally when a voltage is applied. 176625), (2) a liquid crystal cell (SID97, Digest of tech. Papers (preliminary collection) 28 (1997) 845) in which the VA mode is multi-domain (for MVA mode) in order to enlarge the viewing angle. ), (3) a liquid crystal cell (n-ASM mode) in which rod-like liquid crystal molecules are substantially vertically aligned when no voltage is applied, and twisted multi-domain alignment when a voltage is applied (Preprints 58 to 59 of the Japanese Liquid Crystal Symposium). (1998)) and (4) SURVIVAL mode liquid crystal cell (presented at LCD International 98). Further, any of a PVA (Patterned Vertical Alignment) type, a photo alignment type (Optical Alignment), and a PSA (Polymer-Sustained Alignment) may be used. Details of these modes are described in JP-A-2006-215326 and JP-T-2008-538819.
In the IPS mode liquid crystal cell, rod-shaped liquid crystal molecules are oriented substantially parallel to the substrate, and the liquid crystal molecules respond planarly when an electric field parallel to the substrate surface is applied. In the IPS mode, black display is performed when no electric field is applied, and the absorption axes of a pair of upper and lower polarizing plates are orthogonal to each other. Japanese Patent Application Laid-Open Nos. H10-54982, H11-202323, and H9-292522 disclose a method of using an optical compensatory sheet to reduce leakage light during black display in an oblique direction and improve the viewing angle. And JP-A-11-133408, JP-A-11-305217, and JP-A-10-307291.

[Organic EL display]
As an organic EL display device which is an example of the image display device of the present invention, for example, an embodiment having the polarizing plate of the present invention and the organic EL display panel in this order from the viewing side is preferable.
Here, the polarizing plate of the present invention in the organic EL display device is preferably arranged in the order of a polarizer, any other film, and a retardation film from the viewing side, and a retardation film, or another retardation film. More preferably, either the film or the retardation film has a λ / 4 function.
The organic EL display panel is a display panel configured using an organic EL element having an organic light-emitting layer (organic electroluminescent layer) sandwiched between electrodes (between a cathode and an anode). The configuration of the organic EL display panel is not particularly limited, and a known configuration is employed.

特 徴 The features of the present invention will be more specifically described below with reference to examples and comparative examples. Materials, usage amounts, ratios, processing contents, processing procedures, and the like shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the specific examples described below.

[Example 1]
<Preparation of transfer film>
A liquid crystal composition 1 prepared with the following composition was applied on a cellulose-based polymer film (TG40, manufactured by FUJIFILM Corporation) using a # 3.5 wire bar.
Next, the composition was heated with warm air at 40 ° C. for 60 seconds for drying the solvent of the composition and ripening the alignment of the liquid crystal compound.
Next, ultraviolet irradiation (300 mJ / cm ² ) was performed at 40 ° C. at an oxygen concentration of 100 ppm under a nitrogen purge to fix the orientation of the liquid crystalline compound to form a retardation layer, thereby producing a transfer film of Example 1.

―――――――――――――――――――――――――――――――――
Liquid crystal composition 1
―――――――――――――――――――――――――――――――――
83 parts by weight of the following rod-shaped liquid crystal compound (M-1) 15 parts by weight of the following rod-shaped liquid crystal compound (M-2) 2 parts by weight of the following rod-shaped liquid crystal compound (M-3) ・ The following urethane monomer (EB1290,
10 parts by mass of the following polymerization initiator (IrgacureOXE01,
4 parts by mass, 3 parts by mass of the following fluorine-based polymer (M-5), 0.3 parts by mass of the following fluorine-based polymer (M-6), 1.5 parts by mass of the following onium compound S01, 552 parts by mass of toluene・ 138 parts by mass of methyl ethyl ketone (MEK) ――――――――――――――――――――――――――――――――

Rod-like liquid crystalline compound (M-1)

Rod-like liquid crystalline compound (M-2)

Rod-like liquid crystalline compound (M-3)

Urethane monomer

Polymerization initiator

Fluoropolymer (M-5)

Fluoropolymer (M-6)

Onium salt compound S01

[Examples 2 to 8]
A transfer film was produced in the same manner as in Example 1, except that the conditions for the amount of monomer added, the type of initiator, the type of solvent, and the amount of exposure were changed to those shown in Table 1 below.
In addition, in Table 1 below, the initiator used in Example 6 is IrgacureOXE02 (manufactured by BASF) represented by the following formula.

[Example 9]
A transfer film was produced in the same manner as in Example 1 except that the monomer was changed to A-TMMT (pentaerythritol tetraacrylate) (manufactured by Shin-Nakamura Chemical Co., Ltd.).

[Example 10]
A transfer film was prepared in the same manner as in Example 1 except that the monomer was changed to SP327 described below (manufactured by Osaka Organic Chemical Industry Co., Ltd.).

[Example 11]
A transfer film was produced in the same manner as in Example 1 except that a PET (polyethylene terephthalate) film was used instead of the cellulose-based polymer film (TG40, manufactured by Fuji Film Co., Ltd.).

[Example 12]
A transfer film was prepared in the same manner as in Example 11, except that an alignment film shown below was formed on the PET film, and the liquid crystal composition 1 was applied on the alignment film subjected to the corona treatment shown below. .
<Orientation film>
The non-liquid crystal composition 1 prepared with the following composition was applied on a PET film using a # 8 wire bar.
Next, for drying the solvent of the composition, the composition was heated with warm air at 40 ° C. for 60 seconds to form a coating film having a film thickness of 2.8 μm. Subsequently, ultraviolet irradiation (300 mJ / cm ² ) was performed at 40 ° C. at an oxygen concentration of 100 ppm under a nitrogen purge to form an alignment film.
Next, a corona treatment (output: 15 W · min / m ² , conveyance speed: 10 m / min) was performed.

―――――――――――――――――――――――――――――――――
Non-liquid crystal composition 1
―――――――――――――――――――――――――――――――――
・ Urethane monomer (EB1290,
100 parts by weight, polymerization initiator (IrgacureOXE01, manufactured by BASF) 4 parts by weight, toluene 242 parts by weight ―――――――――――――――――――――― ―――――――――――

Example 13
A transfer film was produced in the same manner as in Example 12, except that the thickness of the alignment film was changed to 2.0 μm.

[Example 14]
A transfer film was produced in the same manner as in Example 12, except that the non-liquid crystal composition 1 was changed to a non-liquid crystal composition 2 prepared with the following composition.
―――――――――――――――――――――――――――――――――
Non-liquid crystal composition 2
―――――――――――――――――――――――――――――――――
100 parts by mass of pentaerythritol tetraacrylate (A-TMMT, manufactured by Shin-Nakamura Chemical Co., Ltd.) 4 parts by mass of polymerization initiator (IrgacureOXE01, manufactured by BASF) 4 parts by mass of toluene 242 parts by mass ――――――――――――――――――――――

[Example 15]
A transfer film was produced in the same manner as in Example 12, except that Liquid Crystal Composition 2 having the following composition was used instead of Liquid Crystal Composition 1.
―――――――――――――――――――――――――――――――――
Liquid crystal composition 2
―――――――――――――――――――――――――――――――――
83 parts by weight of the rod-shaped liquid crystal compound (M-1) 15 parts by weight of the rod-shaped liquid crystal compound (M-2) 2 parts by weight of the rod-shaped liquid crystal compound (M-3) ・ Polyfunctional monomer (A-400) 2 parts by weight of the polymerization initiator (IrgacureOXE01,
4 parts by weight, 3 parts by weight of the fluoropolymer (M-5), 0.3 parts by weight of the fluoropolymer (M-6), 1.5 parts by weight of the onium compound S01, 552 parts by weight of toluene・ 138 parts by mass of methyl ethyl ketone (MEK) ――――――――――――――――――――――――――――――――

[Example 16]
A transfer film was produced in the same manner as in Example 12, except that the non-liquid crystal composition 1 was changed to a non-liquid crystal composition 3 prepared with the following composition.
―――――――――――――――――――――――――――――――――
Non-liquid crystal composition 3
―――――――――――――――――――――――――――――――――
・ 100 parts by mass of SP327 (manufactured by Osaka Organic Chemical Industry) ・ 4 parts by mass of polymerization initiator (IrgacureOXE01, manufactured by BASF) ・ 242 parts by mass of toluene ―――――――――――――――――― ――――――――――――――――

[Example 17]
A transfer film was produced in the same manner as in Example 15 except that the non-liquid crystal composition 1 was changed to the above-described non-liquid crystal composition 2.

[Comparative Examples 1 to 6]
A transfer film was prepared in the same manner as in Example 1, except that the conditions for the amount of monomer added, the amount of exposure, and the thickness of the retardation layer were changed to those shown in Table 2 below.

[Comparative Example 7]
A transfer film was produced in the same manner as in Example 15, except that the orientation film was not provided and the amount of the monomer was changed to 20 parts by mass.

[Comparative Example 8]
A transfer film was produced in the same manner as in Example 10, except that the amount of the monomer was changed to 8 parts by mass.

[Evaluation]
About the produced transfer film, the breaking peeling load, the peel strength, the concentration of the liquid crystalline compound, the processability, and the transferability of the retardation film were evaluated.

(Break peeling load)
About the produced transfer film, the breaking peeling load was measured by the above-mentioned method. The results are shown in Tables 1 and 2 below.

(Peel strength)
About the produced transfer film, the peeling strength between the temporary support and the retardation film was measured by the method described above. The results are shown in Tables 1 and 2 below.

(Concentration of liquid crystal compound)
When the concentration of the liquid crystal compound was measured by the method described above for the prepared transfer film, the liquid crystallinity at the interface between the phase difference layer and the temporary support relative to the concentration of the liquid crystal compound at the center in the thickness direction of the phase difference layer was measured. The concentration ratios of the compounds were all 10%.

[Workability]
After pressing the prepared transfer film against a roller and rubbing it a predetermined number of times, the surface state was determined according to the following criteria. The results are shown in Table 1 below.
A: Rubbed 100 times, no scratches and peeling B: Rubbed 60 times, no scratches and peeling C: Rubbed 30 times, no scratches and peeling D: Rubbed 30 times, scratched but peeled No occurrence E: Scratches, scratches and peeling occurred 30 times

(Transferability)
The prepared transfer film is bonded to the pressure-sensitive adhesive layer of a polarizer to which a pressure-sensitive adhesive (SK1478, manufactured by Soken Chemical Co., Ltd.) is bonded, and then the phase difference film is bonded thereto. The temporary support was peeled off.
As a result, the transferability of the produced transfer film was good without any zipping phenomenon and no trace of peeling.

From the results shown in Tables 1 and 2, it was found that if the peeling load at break of the retardation layer adjacent to the temporary support was less than 0.4 N / 25 mm, workability was poor (Comparative Examples 1 to 8). From the results of Comparative Examples 1 to 6, even if the retardation layer is a layer obtained by polymerizing a composition containing a non-liquid crystalline compound having a polymerizable group having three or more functional groups, It is understood that the breaking peeling load is less than 0.4 N / 25 mm depending on the blending amount of the (monomer), the exposure amount, and the film thickness of the retardation layer.
On the other hand, when the retardation layer or the alignment film adjacent to the temporary support satisfies both the requirement 1 and the requirement 2, it has excellent workability and good transferability of the retardation film. (Examples 1 to 17)

DESCRIPTION OF SYMBOLS 1 Temporary support 2 Retardation film 2a Retardation layer 2b Orientation film 3 Other film 4 Polarizer 5 Adhesive 6 Glass substrate 7 UV curable resin composition 8 TAC substrate 10, 10a, 10b, 20 Transfer film 30, 40 Polarizer

Claims (16)

Temporary support, a transfer film having a retardation film provided releasably on the temporary support,
The retardation film includes a retardation layer disposed directly or via an alignment film on the temporary support,
The retardation layer is a layer obtained by polymerizing a composition containing a liquid crystal compound having a polymerizable group,
When the retardation layer is disposed directly on the temporary support, the retardation layer satisfies both the following requirements 1 and 2,
In the case where the retardation layer is disposed on the temporary support via the alignment film, the transfer film satisfies both the following requirements 1 and 2.
Requirement 1: A layer obtained by polymerizing a composition containing a non-liquid crystalline compound having a polymerizable group having three or more functional groups Requirement 2: A layer having a breaking peel load of 0.4 N / 25 mm or more The transfer film according to claim 1, wherein the non-liquid crystal compound has a molecular weight of 150 or less per polymerizable group. The transfer film according to claim 1 or 2, wherein the non-liquid crystalline compound has a urethane bond in a molecule. (4) The transfer film according to any one of (1) to (3), wherein the peel strength between the temporary support and the retardation film is 0.05 to 0.60 N / 25 mm. The retardation layer is disposed directly on the temporary support,
5. The phase difference layer according to claim 1, wherein the retardation layer is a layer obtained by polymerizing a composition containing a liquid crystal compound having a polymerizable group and a non-liquid crystal compound having a tri- or more functional polymerizable group. The transfer film according to any one of the above. The transfer film according to claim 5, wherein the content of the non-liquid crystal compound is 6 parts by mass or more based on 100 parts by mass of the liquid crystal compound. The transfer film according to claim 5, wherein the content of the non-liquid crystal compound is more than 10 parts by mass and less than 30 parts by mass based on 100 parts by mass of the liquid crystal compound. 8. The transfer film according to claim 5, wherein the retardation layer has a structure in which the liquid crystal compound and the non-liquid crystal compound are copolymerized. The transfer film according to claim 5, wherein the retardation layer satisfies the following requirement 3:
Requirement 3: The concentration of the liquid crystalline compound at the interface of the retardation layer with the temporary support is 50% or less with respect to the concentration of the liquid crystalline compound at the center in the thickness direction of the retardation layer. The transfer film according to any one of claims 1 to 4, wherein the retardation layer is disposed on the temporary support via the alignment film, and the alignment film satisfies the following requirement 4.
Requirement 4: Layer obtained by polymerizing a composition containing a non-liquid crystalline compound having a polymerizable group having three or more functional groups in an amount of 80% by mass or more based on the total mass of the solid content of the non-liquid crystalline compound. In addition, having another film,
The transfer according to any one of claims 1 to 10, wherein the other film is bonded to a surface of the retardation film on a side opposite to the temporary support via an adhesive or an adhesive. the film. A retardation film obtained by removing a temporary support from the transfer film according to any one of claims 1 to 10, and a polarizer,
A polarizing plate, wherein the polarizer is bonded to a surface of the retardation film via an adhesive or an adhesive. A laminate of a retardation film and another film obtained by removing the temporary support from the transfer film according to claim 11, and a polarizer,
A polarizing plate, wherein the polarizer is bonded to a surface of the other film via an adhesive or an adhesive. 画像 An image display device comprising the polarizing plate according to claim 12. It is a manufacturing method of the polarizing plate which manufactures the polarizing plate of Claim 12, Comprising:
A bonding step of bonding a polarizer to the surface of the retardation film of the transfer film according to any one of claims 1 to 10 opposite to the temporary support with an adhesive or an adhesive.
A method for manufacturing a polarizing plate, comprising: a step of peeling off the temporary support after the laminating step to produce the polarizing plate. It is a manufacturing method of the polarizing plate which produces the polarizing plate of Claim 13, Comprising:
A laminating step of laminating a polarizer via a pressure-sensitive adhesive or an adhesive on the surface of the other film having the transfer film according to claim 11, the surface being opposite to the retardation film,
A step of peeling off the temporary support of the transfer film after the laminating step to produce the polarizing plate.

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