JP2018010086A - Method for producing transfer film, transfer film, transfer film roll and curable resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simpler method for producing a transfer film having a retardation layer having an excellent orientated state; and to provide a transfer film, a transfer film roll and a curable resin composition.SOLUTION: A method for producing a transfer film includes: a step a of applying a curable resin composition onto one surface of a temporary support body to form a curable resin composition layer; a step b of curing the curable resin composition layer to form a hard coat layer; and a step c of forming a retardation layer on the surface of the hard coat layer, where the curable resin composition contains at least one polymerizable compound selected from the group consisting of a monomer and an oligomer and a polymer containing a polymerizable group.SELECTED DRAWING: None

Description

  The present invention relates to a transfer film manufacturing method, a transfer film, a transfer film roll, and a curable resin composition.

  The retardation layer is applied to various uses. Examples of the retardation layer include a layer in which a rod-like liquid crystal compound is homogeneously aligned and the alignment state is fixed. An alignment film may be used for alignment formation of the liquid crystal compound.

On the other hand, when the retardation layer is applied to each application, a hard coat layer is disposed on the retardation layer so that the surface of the retardation layer is not damaged.
For example, Patent Document 1 discloses an optical anisotropic hard coat transfer having at least one hard coat layer and at least one optical anisotropic layer (retardation layer) on one surface of a temporary support. A film is described. More specifically, for example, a transfer film formed by laminating a temporary support, a hard coat layer, an alignment layer, and an optically anisotropic layer adjacent to each other in this order, and one surface of the temporary support Describes a transfer film in which a hard coat layer and an optically anisotropic layer are laminated adjacent to each other. In addition, referring to the Example column of Patent Document 1, the composition used for forming the hard coat layer contained Acrybase MH-101-5.

JP2015-184410A

On the other hand, when the productivity of the transfer film is taken into consideration, an embodiment in which no alignment film is used is preferable. That is, for example, when producing a transfer film in which the above-mentioned temporary support, hard coat layer, alignment layer, and retardation layer are laminated adjacent to each other in this order, the composition for the alignment film is formed on the hard coat layer. A process of applying an object and further curing it to form an alignment film is necessary, and the process becomes complicated.
In recent years, further improvement in the orientation of components constituting the retardation layer has been demanded with various demands for improvement in performance. The present inventors have prepared a transfer film in which a hard coat layer and a retardation layer are laminated adjacently on one surface of a temporary support described in Patent Document 1 (in the Examples section of Patent Document 1). As a result, the inventors found that further improvement is necessary in the alignment state of the retardation layer.

  Then, this invention makes it a subject to provide the more simple manufacturing method of the transfer film provided with the phase difference layer which has the outstanding orientation state. Another object of the present invention is to provide a transfer film, a transfer film roll, and a curable resin composition.

As a result of intensive studies to achieve the above-mentioned problems, the present inventors apply a curable resin composition on one surface of a temporary support to form a curable resin composition layer, which will be described later. A method for producing a transfer film, comprising a step b and a step c described later, wherein the curable resin composition contains a polymerizable compound described later and a polymer containing a polymerizable group described later. The present inventors have found that the problems can be solved and completed the present invention.
That is, it has been found that the above-described problem can be achieved by the following configuration.

[1] Step a of applying a curable resin composition to form a curable resin composition layer on one surface of a temporary support, and curing the curable resin composition layer to form a hard coat layer At least one selected from the group consisting of a monomer and an oligomer, comprising a step b and a step c of forming a retardation layer on the surface of the hard coat layer. A method for producing a transfer film, comprising a polymerizable compound and a polymer containing a polymerizable group.
[2] The method for producing a transfer film according to [1], wherein the polymerizable compound is non-liquid crystalline and contains 3 or more polymerizable groups in one molecule.
[3] The polymerizable compound contains 4 or more polymerizable groups in one molecule, has a weight average molecular weight of 10,000 or less, and the polymerizable group is composed of an acryloyl group and a methacryloyl group. The method for producing a transfer film according to [2], which is at least one selected.
[4] The method for producing a transfer film according to any one of [1] to [3], wherein the polymer contains a repeating unit represented by the formula (1).
[5] In the repeating unit represented by the formula (1), R ₁ is a hydrogen atom or a methyl group, and P ₁ is selected from the group consisting of an acryloyl group, a methacryloyl group, a maleimide group, and a styryl group. A monovalent group containing a group, and L ₁ is —O—, an alkylene group, an arylene group, * —C (═O) O—, * —C (═O) NH—, * —OC (═O )-, * -NHC (= O)-, and a method for producing a transfer film according to [4], which is a group obtained by combining these. In addition, * represents the position connected to the main chain.
[6] The method for producing a transfer film according to any one of [1] to [5], wherein the polymer has a weight average molecular weight of more than 20000.
[7] The method for producing a transfer film according to any one of [1] to [6], wherein ΔSP obtained by the formula (2) is more than 1.3.
[8] The method for producing a transfer film according to any one of [1] to [7], further comprising a step d of rubbing the surface of the hard coat layer between the step b and the step c.
[9] Step c is a step of coating the retardation layer composition on the surface of the hard coat layer to form the retardation layer composition layer, and curing the retardation layer composition layer. And a step of forming a retardation layer. The method for producing a transfer film according to any one of [1] to [8], wherein the composition for retardation layer contains a polymerizable liquid crystal compound 1.
[10] The transfer film according to [9], wherein the polymerizable liquid crystal compound 1 contains at least one group selected from the group consisting of an acryloyl group and a methacryloyl group in one molecule. Production method.
[11] The method for producing a transfer film according to any one of [1] to [10], further including a step e of forming a circularly polarized light reflecting layer on the surface of the retardation layer.
[12] Step e is a step of forming a circularly polarized reflective layer by applying the circularly polarized reflective layer composition to form a circularly polarized reflective layer composition layer and curing the circularly polarized reflective layer composition layer. The composition for a circularly polarized light reflecting layer contains a polymerizable liquid crystal compound 2 and a chiral agent, and the polymerizable liquid crystal compound 2 is selected from the group consisting of an acryloyl group and a methacryloyl group in one molecule. The method for producing a transfer film according to [11], comprising at least one kind of group to be used.
[13] The method for producing a transfer film according to any one of [1] to [10], further comprising a step f of winding the transfer film into a roll after the step c.
[14] The method for producing a transfer film according to [11] or [12], further comprising a step f of winding the transfer film into a roll after the step e.
[15] A temporary support, a hard coat layer provided on one surface of the temporary support, and a retardation layer provided on the surface of the hard coat layer in this order, A hard coat layer obtained by curing a curable resin composition containing at least one polymerizable compound selected from the group consisting of a monomer and an oligomer, and a polymer containing a polymerizable group. , Transfer film.
[16] The transfer film according to [15], wherein the polymerizable compound is non-liquid crystalline and contains 3 or more polymerizable groups in one molecule.
[17] The polymerizable compound contains 4 or more polymerizable groups in one molecule, has a weight average molecular weight of 10,000 or less, and the polymerizable group is composed of an acryloyl group and a methacryloyl group. The transfer film according to [16], which is at least one selected.
[18] The transfer film according to any one of [15] to [17], wherein the polymer contains a repeating unit represented by the formula (1).
[19] In the repeating unit represented by the formula (1), R ₁ is a hydrogen atom or a methyl group, and P ₁ is selected from the group consisting of an acryloyl group, a methacryloyl group, a maleimide group, and a styryl group. A monovalent group containing a group, and L ₁ is —O—, an alkylene group, an arylene group, * —C (═O) O—, * —C (═O) NH—, * —OC (═O) The transfer film according to [18], which is-, * -NHC (= O)-, and a group obtained by combining these.
In addition, * represents the position connected to the main chain.
[20] The transfer film according to any one of [15] to [19], wherein the polymer has a weight average molecular weight of more than 20000.
[21] The transfer film according to any one of [15] to [20], wherein ΔSP obtained by the formula (2) is greater than 1.3.
[22] The retardation layer is a retardation layer obtained by curing the composition for retardation layer containing the polymerizable liquid crystal compound 1, and the polymerizable liquid crystal compound 1 includes an acryloyl group and a methacryloyl group. The transfer film according to any one of [15] to [21], which contains at least one group selected from the group consisting of 2 or more per molecule.
[23] The transfer film according to any one of [15] to [22], comprising a circularly polarized light reflection layer on the surface of the retardation layer.
[24] A circularly polarized light reflecting layer is obtained by curing a composition for a circularly polarized light reflecting layer, and the composition for a circularly polarized light reflecting layer contains a polymerizable liquid crystal compound 2 and a chiral agent, and contains a polymerizable liquid crystal. The transfer film according to [23], wherein the compound 2 contains at least one group selected from the group consisting of an acryloyl group and a methacryloyl group in one molecule.
[25] A transfer film roll comprising a core and the transfer film according to any one of [15] to [24] wound around the core in a roll shape.
[26] containing at least one polymerizable compound selected from the group consisting of a monomer and an oligomer, and a polymer containing a polymerizable group, the polymerizable compound being non-liquid crystalline, and A curable resin composition containing three or more polymerizable groups in one molecule.

  ADVANTAGE OF THE INVENTION According to this invention, the simpler manufacturing method of the transfer film provided with the phase difference layer which has the outstanding orientation state can be provided. Moreover, according to this invention, a transfer film, a transfer film roll, and a curable resin composition can be provided.

Hereinafter, the present invention will be described in detail.
The description of the constituent elements described below may be made based on typical embodiments of the present invention, but the present invention is not limited to such embodiments.
In the present specification, a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
Moreover, in the description of group (atomic group) in this specification, the description which does not describe substitution and non-substitution includes what does not contain a substituent and what contains a substituent. For example, the “alkyl group” includes not only an alkyl group not containing a substituent (unsubstituted alkyl group) but also an alkyl group containing a substituent (substituted alkyl group).
Moreover, in this specification, "(meth) acrylate" represents an acrylate and a methacrylate. In the present specification, “(meth) acryl” represents acryl and methacryl. In the present specification, “(meth) acryloyl” represents acryloyl and methacryloyl.
Moreover, in this specification, a monomer is distinguished from an oligomer and a polymer, and the molecule | numerator whose weight average molecular weight is 2000 or less is intended.
In the present specification, an oligomer means a molecule having a weight average molecular weight of more than 2000 and 10,000 or less.
Moreover, in this specification, a polymer intends the molecule | numerator whose weight average molecular weight exceeds 10,000. In the above, the weight average molecular weight means a weight average molecular weight measured by the method described later in the case where the molecule has a molecular weight distribution, and in the case of a compound having no molecular weight distribution (monodispersed), Contemplates molecular weight calculated from chemical structure.
In the present specification, the term “polymerizable compound” means a monomer and / or oligomer unless otherwise specified. The polymerizable group refers to a group involved in the polymerization reaction.

[Transfer Film Manufacturing Method]
The manufacturing method of the transfer film which concerns on 1st embodiment of this invention contains the following process a, process b, and process c.
Step a: Step of forming a curable resin composition layer by applying a curable resin composition on one surface of the temporary support. Step b: Hardening the curable resin composition layer to form a hard coat layer Step / step c: forming a retardation layer on the surface of the hard coat layer

Moreover, the manufacturing method of the transfer film which concerns on the 2nd embodiment of this invention contains the following processes d between the process b and the process c.
Step d: Step of rubbing the surface of the hard coat layer

Moreover, the manufacturing method of the transfer film which concerns on 3rd embodiment of this invention contains the following processes e after the process c.
Step e: Step of further forming a circularly polarized light reflecting layer on the surface of the retardation layer

Moreover, the manufacturing method of the transfer film which concerns on the 4th embodiment of this invention contains the following processes f after the process c or the process e.
Step f: Step of winding the transfer film into a roll

  In the following description, the transfer film manufacturing methods according to the first to fourth embodiments are collectively referred to as a transfer film manufacturing method according to an embodiment of the present invention.

The mechanism by which the effect of the present invention can be obtained by the method for producing a transfer film containing the above configuration is not necessarily clear, but the present inventors presume as follows.
One of the features of the method for producing a transfer film according to the above embodiment is that a curable resin composition containing a polymerizable compound and a polymer containing a polymerizable group is provided on one surface of the temporary support. And a hard coat layer formed by curing.
That is, in the step of forming the hard coat layer, the polymerizable compound and the polymer are phase-separated in the curable resin composition layer, and the polymer is separated from the upper layer region of the curable resin composition layer (with the temporary support). It is presumed that a concentrated layer of polymer is formed in the upper layer region. The polymer layer concentrated in the upper layer region is presumed to form an alignment film region having a function as an alignment film in a hard coat layer obtained by curing the curable resin composition layer.
On the other hand, it is presumed that the monomer tends to be unevenly distributed in the lower layer region (intended in the vicinity of the interface with the temporary support) and has an action of curing to form a strong hard coat layer.
As mentioned above, since the manufacturing method of the transfer film which concerns on the said embodiment forms a hard-coat layer using a predetermined | prescribed curable resin composition, an alignment film area | region is formed in the upper layer area | region. For this reason, according to the manufacturing method of the transfer film which concerns on the said embodiment, the process of forming alignment film on a hard-coat layer is not required. Therefore, a transfer film can be manufactured more easily.

Furthermore, as described above, even when a retardation film is directly formed on the hard coat layer described in Patent Document 1 to obtain a transfer film, the retardation layer may not be uniformly oriented. The present inventors know.
Regarding the above phenomenon, the present inventors have intensively studied. When the composition for retardation layer is applied on the surface of the hard coat layer, the polymer (acrylic base MH-101- 5) was found to be caused by dissolution.
On the other hand, in the method for producing a transfer film according to the above embodiment, the polymer forming the alignment film region contains a polymerizable group. Therefore, the obtained alignment film region has excellent solvent resistance. Accordingly, even when the retardation layer is formed by applying the composition for a retardation layer on the surface of the hard coat layer having the alignment film region, the retardation layer has a more uniform alignment state.

As described above, in the method for producing a transfer film according to an embodiment of the present invention, a curable resin composition containing a polymerizable compound and a polymer containing a polymerizable group is placed on one surface of the temporary support. By applying and curing to form a hard coat layer, a synergistic effect due to the formation of the alignment film region and the solvent resistance imparted by the polymerizable group was obtained, and the effects of the present invention were obtained. Presumed to be.
Hereinafter, the aspect is demonstrated for every process.

[Step a]
Step a is a step of forming a curable resin composition layer by applying a curable resin composition on one surface of the temporary support.
The method for applying the curable resin composition is not particularly limited, and a known application method can be used. Examples of known coating methods 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.

  Although it does not restrict | limit especially as a film thickness of a curable resin composition layer, 2-10 micrometers is preferable as a dry film thickness, 3-6 micrometers is more preferable.

  Moreover, after apply | coating curable resin composition, in order to remove a solvent, you may heat-process. The heat treatment conditions in that case are not particularly limited. For example, the heating temperature is preferably 20 to 200 ° C., more preferably 40 to 160 ° C., and the heating time is preferably 10 to 600 seconds, 30 to 300 seconds is more preferable.

<Temporary support>
In the above transfer film, the temporary support has a function as a support for forming the hard coat layer and the retardation layer, and the hard coat layer and the retardation layer are formed into desired devices (touch panel and liquid crystal). When transferred to a display device or the like, the temporary support is peeled off from the hard coat layer and removed. (That is, when the temporary support is peeled off after transfer, a laminate having a retardation layer and a hard coat layer in this order from the device side is obtained.)

  The temporary support may be transparent or opaque, and the material is not particularly limited. The temporary support may be composed of a polymer. Examples of the polymer constituting the temporary support include cellulose esters (eg, cellulose acetate, cellulose propionate, and cellulose butyrate), and polyolefin (polyethylene). And polypropylene), cyclic olefins (such as norbornene-based polymers), poly (meth) acrylic acid esters (eg, polymethyl methacrylate), polycarbonates, polyesters, and polysulfones.

The temporary support is preferably transparent to visible light, and is transparent and has a low compounding property in that the optical properties of the retardation layer and / or hard coat layer can be easily inspected during and / or after the manufacturing process. More preferably, it is refraction. From the viewpoint of low birefringence, the material of the temporary support is preferably cellulose ester or cyclic olefin. Examples of commercially available norbornene-based polymers include Arton (manufactured by JSR Co., Ltd.), Zeonex, Zeonore (manufactured by Nippon Zeon Co., Ltd.), and TOPAS (manufactured by Polyplastics Co., Ltd.). In addition, inexpensive polycarbonate and / or polyethylene terephthalate are also preferably used.
The thickness of the temporary support is not particularly limited, but is generally preferably 10 to 1000 μm, more preferably 10 to 200 μm.

<Curable resin composition>
The curable resin composition contains at least the following components (I) and (II).
(I) A monomer and at least one polymerizable compound selected from the group consisting of oligomers (II) a polymer containing a polymerizable group, and the curable resin composition,
(III) Other components may be contained.
The curable resin composition has a function of curing to form a hard coat layer and forming an alignment film region in the upper layer region of the hard coat layer (near the interface opposite to the interface with the temporary support).

(II) Polymer containing a polymerizable group The polymer containing a polymerizable group is not particularly limited, and a known polymer can be used. As the polymer, a polymer having no liquid crystallinity (hereinafter referred to as “amorphous polymer”) is preferable.
As the polymerizable group, a reactive group that can be cross-linked by irradiation with ultraviolet rays is preferable in terms of more excellent reactivity.
As the polymerizable group, an ethylenically unsaturated group such as an acryloyl group, a methacryloyl group, a styryl group, and a maleimide group; a cationic polymerizable group such as an epoxy group and an oxetane group is more preferable, and an ethylenically unsaturated group Is more preferable.

  In the present specification, the maleimide group means an unsubstituted or substituted maleimide group. The substituted maleimide group means a group containing a substituent on the maleimide ring as represented by the following formula. In the following formulae, R each independently represents an organic group, preferably an alkyl group. Two Rs may be bonded to each other to form a ring. Examples of the maleimide having such a ring include 2- (1,2-cyclohex-1-enedicarboximide). In the formula, * indicates a bonding position.

  The form of the polymerization reaction of the polymer is not particularly limited, but a radical polymerization reaction is the simplest and preferable.

  The polymer preferably contains a repeating unit represented by the formula (1) (hereinafter also referred to as “polymerizable group unit”).

In formula (1), R ₁ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, preferably a hydrogen atom or a methyl group.
L ₁ represents a single bond or a divalent linking group, and examples of the divalent linking group include —O—, an alkylene group, an arylene group, * —C (═O) O—, * —C ( ═O) NH—, * —OC (═O) —, * —NHC (═O) —, and combinations thereof. In addition, * represents the position connected to the main chain. In other words, it is intended to be connected to the main chain on the * side.
L ₁ is more preferably an arylene group, * —C (═O) O—, * —C (═O) NH—, or * —OC (═O) —.

P ₁ represents a monovalent group containing an ethylenically unsaturated group, and among them, a monovalent group containing a group selected from the group consisting of an acryloyl group, a methacryloyl group, a maleimide group, and a styryl group is preferable. A monovalent group including a group selected from the group consisting of an acryloyl group, a methacryloyl group, and a maleimide group is more preferable.
In formula (1), as a preferable combination, R ₁ is a hydrogen atom or a methyl group; L ₁ is an alkylene group, an arylene group, * —C (═O) O—, * —C (═O) NH -, * -OC (= O)-, or a group obtained by combining these; a monovalent group including a group in which P ₁ is selected from the group consisting of an acryloyl group, a methacryloyl group, and a styryl group.

The polymer is presumed to form a concentrated layer (alignment film region) in the upper layer region of the curable resin composition layer. In order to make it easy to form a concentrated polymer layer in the upper layer region of the curable resin composition layer, it is preferable that it is less compatible with the polymerizable compound described later.
In other words, it is preferable that δa (P) representing the non-dispersing force component of the polymer in the three-dimensional solubility parameter representing the compatibility scale does not coincide with δa (M) of the polymerizable compound, and δa (M) is Larger is preferred.
Among these, ΔSP (ΔSP value) represented by the following formula (2) is preferably more than 0, more preferably more than 0.3, and more than 0.5 in that a more excellent effect of the present invention can be obtained. Is more preferable, less than 20, preferably less than 10, more preferably less than 5.0. Among them, when the ΔSP is greater than 1.3, a further excellent effect of the present invention can be obtained.
Formula (2) ΔSP = δa (M) −δa (P)

The values of δa (P) and δa (M) described above are SP (Solubility Parameter) values calculated by the method of Hoy et al. (VAN KREVElen, D.W., “PROPERTIES OF POLYMERS (ED.3)). "See ELSEVIER publication (1990)). That is, the δa value can be calculated by the following equation (X) using the three-dimensional solubility parameters (δd, δp, δh) calculated by the method of Hoy et al. According to the method of Hoy et al., Each value of δd, δp, and δh can be calculated from the chemical structural formula of the desired compound. In the case of an oligomer or polymer composed of a plurality of repeating units, the square value (δd ² , δp ² , δh ² ) of the three-dimensional solubility parameter for each repeating unit is multiplied by the volume fraction for each repeating unit. The square value (δd ² , δp ² , δh ² ) of the three-dimensional solubility parameter of the oligomer or polymer is calculated by obtaining the sum, and the δa value of the oligomer or polymer is obtained by substituting this into formula (X). be able to.
δa = (δp ² + δh ² ) ^0.5 formula (X)
The unit of δa is MPa ^0.5 .

Is not particularly restricted but includes .delta.a (P) is a non-dispersion force component of the three-dimensional solubility parameters of the polymer, the lower limit value is preferably ^{8 MPa 0.5} or more, ^{10 MPa 0.5} or more is more preferable. The upper limit value is preferably ^{18 MPa 0.5} or less, ^{15 MPa 0.5} or less is more preferable.
When two or more kinds of polymers are used, the product of each polymer δa (P) and the volume fraction of each polymer in the polymer mixture is obtained, and the sum of them is calculated as “three-dimensional polymer This value is preferably within the above range as δa (P) which is a non-dispersing force component of the solubility parameter. For example, when the polymer P ₁ and the polymer P ₂ are used in combination, the δa (P) value of the mixture of the polymers P ₁ and P ₂ calculated by the following method (represented as δa (P _1,2 ) in this paragraph) ) Is preferably within the above range.
Note that δa (P _1,2 ) can be calculated by the following equation.
Formula: δa (P _1,2 ) = δa (P ₁ ) β + δa (P ₂ ) (1-β)
In the above formula, β means the volume fraction of the polymer P ₁ in the polymer mixture.

The polymer may contain another repeating unit (unit) (copolymerization unit) other than the polymerizable group unit. For example, a repeating unit not containing a polymerizable group (non-polymerizable group unit) and the like can be mentioned.
Incidentally, .delta.a value calculated from the three-dimensional solubility parameters of other repeating units is not particularly limited, in terms of the effect of the present invention is more excellent, it is preferably 7.5 MPa ^0.5 or more, 10 MPa ⁰ More preferably, it is ⁵ or more. The upper limit is not particularly limited, it is preferably ^{18 MPa 0.5} or less, and more preferably ^{16 MPa 0.5} or less.
Further, the difference between the δa value of the polymerizable group unit and the δa value of other repeating units is not particularly limited, but is preferably 0 to ⁵ MPa ^0.5 in terms of more excellent effects of the present invention. more preferably ~2.5MPa ^0.5.

  As a suitable aspect of said other repeating unit, the repeating unit represented by the following formula | equation (3) is mentioned.

In formula (3), R ₂₁ represents a hydrogen atom or a methyl group. R ₂₂ represents an alkyl group which may have a hydroxy group.

The weight average molecular weight of the polymer is not particularly limited, but is preferably more than 20,000, more preferably 30,000 or more, from the viewpoint that the effect of the present invention is more excellent. The upper limit is not particularly limited, but generally 300,000 or less is preferable.
In addition, the said weight average molecular weight can be calculated | required as a polystyrene conversion value measured by GPC (Gel Permeation Chromatography) method. GPC measurement is, for example, apparatus: “Alliance GPC2000 (manufactured by Waters)”, column: TSKgel GMH ₆ -HT × 2 + TSKgel GMH ₆ -HTL × 2 (both 7.5 mm ID × 30 cm, manufactured by Tosoh Corporation), Column temperature: 140 ° C., detector: differential refractometer, mobile phase: solvent (for example, o-dichlorobenzene, etc.) and conditions, and molecular weight can be determined using standard polystyrene and weight average molecular weight. Can be sought.

  The method for synthesizing the polymer is not particularly limited, and can be synthesized by combining known methods. For example, it may be synthesized by (a) a method in which a corresponding monomer is polymerized to directly introduce an ethylenically unsaturated group, and (b) a polymer obtained by polymerizing a monomer having an arbitrary functional group. You may synthesize | combine by the method of introduce | transducing an ethylenically unsaturated group by reaction. Details of the method for synthesizing the non-liquid crystalline polymer are described in, for example, paragraphs 0068 to 0077 of Japanese Patent No. 4184818, the contents of which are incorporated herein by reference.

Although the preferable specific example of the repeating unit represented by Formula (1) below is shown, this invention is not limited to these.

  The polymer containing the repeating unit represented by the formula (1) preferably contains 0.5% by mass or more and 100% by mass or less of the repeating unit represented by the formula (1). % Or less, more preferably 5% by mass or more and 100% by mass or less.

  Although the specific example of the polymer containing the repeating unit represented by Formula (1) is shown in Table 1, a polymer is not restrict | limited to the following specific example. The repeating unit represented by the formula (1) and the other repeating units are represented by the numbers in the above specific examples, and the repeating unit derived from the copolymerizable monomer describes the monomer name. The polymerization composition ratio is indicated by mass%.

In the above table, the repeating unit (N-2) is represented by the following formula.

Moreover, in the said table | surface, a repeating unit (L-1) and a repeating unit (L-3) are respectively represented by the following formula | equation. In addition, the polymer (for example, P-17 and P-18) containing a repeating unit (L-1) and / or a repeating unit (L-3) has liquid crystallinity.

The content of the polymer in the curable resin composition is not particularly limited, but is 0.001 to 50% by mass with respect to the total solid content of the curable resin composition in terms of ensuring sufficient hard coat performance. Preferably, 0.01-10 mass% is more preferable.
In addition, as a polymer, 1 type may be used independently or 2 or more types may be used together. When two or more kinds of polymers are used in combination, the total content is preferably within the above range.

(I) Polymerizable compound The curable resin composition contains at least one polymerizable compound selected from the group consisting of monomers and oligomers. The polymerizable compound has an action of polymerizing to form a hard coat layer.
It does not restrict | limit as a polymeric compound, A well-known polymeric compound can be used.
The polymerizable compound only needs to contain one or more polymerizable groups in one molecule. For example, ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, 2-hydroxy-3- Acryloyloxypropyl methacrylate, polyethylene glycol # 200 diacrylate, polyethylene glycol # 400 diacrylate, polyethylene glycol # 600 diacrylate, polyethylene glycol # 1000 diacrylate, propoxylated ethoxylated bisphenol A diacrylate, ethoxylated bisphenol A diacrylate, 9,9-bis [4- (2-acryloyloxyethoxy) phenyl] fluorene, tricyclodecane dimethanol diacrylate, 1,10-decandiol diacrylate 1,6-hexanediol diacrylate, 1,9-nonanediol diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, 2-methacryloyloxyethylphthalic acid, methoxypolyethylene glycol # 400 methacrylate, 2-methacryloyl Examples thereof include oxyethyl succinate, phenoxyethylene glycol methacrylate, ethylene glycol dimethacrylate, tricyclodecane dimethanol dimethacrylate, and N-vinylpyrrolidone.

  It does not restrict | limit especially as a polymeric group, For example, the functional group etc. which were mentioned as said polymeric group are mentioned. Among these, the polymerizable group is preferably a group containing an ethylenically unsaturated group, and more preferably at least one selected from the group consisting of an acryloyl group and a methacryloyl group. When the polymerizable group is a (meth) acryloyl group, the adhesion between the hard coat layer obtained by curing the curable resin composition and the retardation layer described later is improved.

  Among these, the polymerizable compound is preferably non-liquid crystalline and contains three or more polymerizable groups in one molecule (also referred to as “a tri-functional or higher functional non-liquid crystalline polymerizable compound”). It is more preferable that four or more polymerizable groups are contained in one molecule. The upper limit of the number of polymerizable groups is not particularly limited, but is generally preferably 6 or less.

  Although it does not restrict | limit especially as a weight average molecular weight of a polymeric compound, 10,000 or less are preferable and 2000 or less are more preferable at the point from which the more excellent effect of this invention is acquired.

  The polymerizable compound contains 4 or more polymerizable groups in one molecule, has a weight average molecular weight of 10,000 or less, and the polymerizable group is composed of an acryloyl group and a methacryloyl group. More preferably, it is at least one selected from.

  Specific examples of the polymerizable compound containing three polymerizable groups in one molecule include, for example, ethoxylated isocyanuric acid triacrylate, ε-caprolactone-modified tris- (2-acryloxyethyl) isocyanurate, trimethylolpropane. Examples include triacrylate, pentaerythritol triacrylate, polyester polyfunctional acrylate oligomer (trifunctional), trimethylolpropane trimethacrylate, and urethane polyfunctional acrylate oligomer (trifunctional).

  Moreover, at least 1 sort (s) selected from the group which contains 4 or more polymeric groups in 1 molecule, and a weight average molecular weight is 10,000 or less, and a polymeric group consists of an acryloyl group and a methacryloyl group. Examples of the polymerizable compound include ditrimethylolpropane tetraacrylate (molecular weight 466), pentaerythritol tetraacrylate (molecular weight 352), ethoxylated pentaerythritol tetraacrylate (molecular weight 1892), polyester polyfunctional acrylate oligomer (functional 4-15), Weight average molecular weight 10,000 or less), dipentaerythritol hexaacrylate (molecular weight 578), and urethane polyfunctional acrylate oligomer (4 to 15 functional, weight average molecular weight 10,000 or less).

  Examples of commercially available products include A-DPH (dipentaerythritol hexaacrylate), A-TMMT (pentaerythritol tetraacrylate) (manufactured by Shin-Nakamura Chemical Co., Ltd.); UA-306T (pentaerythritol triacrylate toluene diisocyanate urethane prepolymer), UA-306I (pentaerythritol triacrylate isophorone diisocyanate urethane prepolymer), UA-510H (dipentaerythritol pentaacrylate hexamethylene diisocyanate urethane prepolymer) (manufactured by Kyoeisha); U-6LPA, U-10HA, U-10PA, And urethane acrylates (manufactured by Shin-Nakamura Chemical Co., Ltd.) such as UA-1100H, U-15HA, UA-53H, and UA-33H.

Although it does not restrict | limit especially as content of the polymeric compound in curable resin composition, 50-99.999 mass% with respect to the total solid of a curable resin composition at the point which provides sufficient hard-coat performance. Is preferable, and 90 to 99.999 mass% is more preferable.
In addition, a polymeric compound may be used individually by 1 type, or may use 2 or more types together. When using 2 or more types of polymeric compounds together, it is preferable that total content is in the said range.

Is not particularly restricted but includes .delta.a (M) is a non-dispersion force component of the three-dimensional solubility parameter of the polymerizable compound, the lower limit value is preferably ^{10 MPa 0.5} or more, ^{13 MPa 0.5} or more is more preferable. The upper limit value is preferably ^{24 MPa 0.5} or less, ^{22 MPa 0.5} or less is more preferable.
When two or more kinds of polymerizable compounds are used in combination, the product of δa (M) of each polymerizable compound and the volume fraction of each polymerizable compound in the polymerizable compound mixture are respectively obtained, The value obtained by adding the values is “δa (M) which is a non-dispersing force component of the three-dimensional solubility parameter of the polymerizable compound”, and this value is preferably within the above range. For example, when the polymerizable compound M ₁ and the polymerizable compound M ₂ are used in combination, the δa (M) value of the mixture of the polymerizable compound M ₁ and the polymerizable compound M ₂ calculated by the following method (in this paragraph) δa (represented as M _1,2 ) is preferably within the above range.
Note that δa (M _1,2 ) can be calculated by the following equation.
Formula: δa (M _1,2 ) = δa (M ₁ ) β + δa (M ₂ ) (1-β)
In the above formula, β means the volume fraction of the polymerizable compound P ₁ in the polymerizable compound mixture.

The content ratio of the content of the polymer containing a polymerizable group to the content of the polymerizable compound in the curable resin composition (content of polymer containing a polymerizable group / content of polymerizable compound, below) In this paragraph, it is simply referred to as “mass ratio”.) Is not particularly limited, but is preferably 0.0001 to 2.5.
Especially, the transfer film obtained by the manufacturing method of the said transfer film has more excellent hard coat property (pencil hardness) as mass ratio is 0.001 or more and less than 1.0.

(III) Other components The said curable resin composition may contain the other component, as long as there exists an effect of this invention. Examples of other components include a polymerization initiator, a solvent, a thermoplastic resin containing no polymerizable group, fine particles, and a surfactant. Below, each said component is demonstrated.

-Polymerization initiator It is preferable that the said curable resin composition contains a polymerization initiator.
The polymerization initiator is not particularly limited and can be appropriately selected from known polymerization initiators. For example, those having photosensitivity (so-called photopolymerization initiator) are preferable. In addition to the photopolymerization initiator, a thermal polymerization initiator can be used, and these can be used in combination.
The photopolymerization initiator is not particularly limited as long as it has the ability to initiate polymerization of a polymerizable compound, and a known photopolymerization initiator can be used.
As the photopolymerization initiator, for example, those having photosensitivity from the ultraviolet region to the visible light region are preferable. Further, it may be an activator that generates an active radical by causing some action with a photoexcited sensitizer, and may be an initiator that initiates cationic polymerization according to the type of the polymerizable compound.

Examples of the photopolymerization initiator include acetophenones, benzophenones, Michler benzoyl benzoate, α-amyloxime esters, phosphine oxides, ketals, anthraquinones, thioxanthones, propiophenones, azo compounds, peroxides , 2,3-dialkyldione compounds, disulfide compounds, fluoroamine compounds, benzyls, benzoins, aromatic diazonium salts, aromatic sulfonium salts, aromatic iodonium salts, metallocene compounds, benzoin sulfonate esters, lophine Examples include dimers, onium salts, borate salts, active esters, active halogens, inorganic complexes, coumarins, and acylphosphine oxides.
Specific examples of the photopolymerization initiator, preferred embodiments, commercial products, and the like are described in paragraphs 0133 to 0151 of JP-A-2009-098658, and the above contents are incorporated herein.
Examples of commercially available photopolymerization initiators include IRGACURE 819 (bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, manufactured by BASF).

  Further, the photopolymerization initiator may be used by mixing a photosensitizer. Examples of the photosensitizer include n-butylamine, triethylamine, and poly-n-butylphosphine.

Although it does not restrict | limit especially as content of the polymerization initiator in the said curable resin composition, 0.5-10 mass with respect to the total solid of a curable resin composition at the point which provides sufficient sclerosis | hardenability. % Is preferable, and 1 to 5% by mass is more preferable.
In addition, 1 type may be used independently or 2 or more types may be used together. When two or more polymerization initiators are used in combination, the total content is preferably within the above range.

-Solvent It is preferable that the said curable resin composition contains a solvent.
The solvent is not particularly limited as long as each component of the curable resin composition can be dissolved or dispersed, and a known solvent can be used. Examples of the solvent include water and / or an organic solvent, and preferably contains an organic solvent.
Examples of the organic solvent include butyl ether, dimethoxyethane, diethoxyethane, propylene oxide, 1,4-dioxane, 1,3-dioxolane, 1,3,5-trioxane, tetrahydrofuran, anisole, phenetole, dimethyl carbonate, and methyl carbonate. Ethyl, diethyl carbonate, acetone, methyl ethyl ketone (MEK), diethyl ketone, dipropyl ketone, diisobutyl ketone, cyclopentanone, cyclohexanone, methylcyclohexanone, ethyl formate, propyl formate, pentyl formate, methyl acetate, ethyl acetate, propyl acetate, propion Acid methyl, ethyl propionate, γ-ptyrolactone, methyl 2-methoxyacetate, methyl 2-ethoxyacetate, ethyl 2-ethoxyacetate, ethyl 2-ethoxypropionate, 2-methoxy Tanol, 2-propoxyethanol, 2-butoxyethanol, 1,2-diacetoxyacetone, acetylacetone, diacetone alcohol, methyl acetoacetate, methyl acetoacetate and other methyl alcohol, ethyl alcohol, isopropyl alcohol, n-butyl alcohol, cyclohexyl alcohol , Isobutyl acetate, methyl isobutyl ketone (MIBK), 2-octanone, 2-pentanone, 2-hexanone, ethylene glycol ethyl ether, ethylene glycol isopropyl ether, ethylene glycol butyl ether, propylene glycol methyl ether, ethyl carbitol, butyl carbitol, Hexane, heptane, octane, cyclohexane, methylcyclohexane, ethylcyclohexane, benzene, toluene And xylene.

The content of the solvent in the curable resin composition is not particularly limited, but the curable resin composition has a solid content of 20 to 80% by mass in terms of achieving both sufficient film thickness and uniform coating properties. It is preferable to contain a solvent, and it is more preferable to contain a solvent so that the solid content is 40 to 60% by mass.
In addition, a solvent may be used individually by 1 type, or may use 2 or more types together. When two or more solvents are used in combination, the total content is preferably within the above range.

-Thermoplastic resin which does not contain a polymeric group The said curable resin composition may contain the thermoplastic resin which does not contain a polymeric group.
The thermoplastic resin containing no polymerizable group (hereinafter also simply referred to as “thermoplastic resin”) is a component different from the polymer containing the above-mentioned (II) polymerizable group.
The thermoplastic resin is not particularly limited, and a known resin can be used.
Examples of the thermoplastic resin include styrene resins; (meth) acrylic resins; vinyl acetate resins; polyether resins such as polyethylene glycol; vinyl ether resins; halogen-containing resins; alicyclic olefin resins; Resins; Polyester resins such as polyethylene terephthalate; Polyamide resins such as nylon 6 and 6; Cellulose derivatives; Silicone resins;
The thermoplastic resin is preferably soluble in an organic solvent.
In particular, from the viewpoints of film forming properties, transparency and weather resistance, styrene resins; (meth) acrylic resins; polyether resins such as polyethylene glycol; polyester resins such as alicyclic olefin resins and polyethylene terephthalate; Polyamide resins such as nylon 6,6; cellulose derivatives (cellulose esters, etc.) are preferable, and nylon 6,6, polyethylene terephthalate, or polyethylene glycol is more preferable.
Examples of commercially available products include Acrybase MH-101-5 (acrylic resin, manufactured by Fujikura Kasei Co., Ltd.).

Although it does not restrict | limit especially as content of the thermoplastic resin in a curable resin composition, 0-10 mass% is with respect to the total solid of a curable resin composition at the point which ensures sufficient hard-coat property. Preferably, 0 to 5% by mass is more preferable.
In addition, 1 type may be used independently or 2 or more types may be used together. When using 2 or more types of thermoplastic resins together, it is preferable that total content is in the said range.

Fine particles Examples of the fine particles include inorganic fine particles such as silica particles, alumina particles, zirconia particles, and TiO ₂ particles; acrylic particles, crosslinked acrylic particles, polystyrene particles, crosslinked styrene particles, melamine resin particles, and benzoguanamine resin particles. Resin fine particles; and the like.

The average particle diameter of the fine particles is not particularly limited, but is preferably 10 μm or less. A hard coat layer obtained from a curable resin composition containing fine particles having an average particle size of 0.2 to 10 μm has an antiglare function (antiglare function).
Here, the average particle diameter can be determined from a photograph obtained by observing dispersed particles with a transmission electron microscope. The projected area of the particles is obtained, and the equivalent circle diameter is obtained therefrom, which is taken as the average particle size (average primary particle size). The average particle diameter in this specification can be calculated by measuring the projected area of 300 or more particles and obtaining the equivalent circle diameter.

As the inorganic fine particles, silica fine particles are preferably used because of easy modification.
As the silica fine particles, dry powdery silica produced by combustion of silicon tetrachloride can be used, but colloidal silica in which silicon dioxide is dispersed in a solvent is more preferably used. Specific examples include, but are not limited to, Snowtex series manufactured by Nissan Chemical Industries, Ltd. such as MEK-ST, MEK-ST-L, and MEK-ST-XL.

Although it does not restrict | limit especially as content of the microparticles | fine-particles in curable resin composition, 0-5 mass with respect to the total solid of a curable resin composition by the point which ensures the transparency of a curable resin composition layer. % Is preferable, and 0 to 1% by mass is more preferable.
In addition, 1 type may be used independently or 2 or more types may be used together. When two or more kinds of fine particles are used in combination, the total content is preferably within the above range.

-Surfactant It does not restrict | limit especially as surfactant, A well-known surfactant can be used.
Examples of the surfactant include a fluorine-based surfactant, a nonionic surfactant, a cationic surfactant, an anionic surfactant, and a silicone-based surfactant. Surfactant has the effect | action which improves the applicability | paintability of curable resin composition.

Examples of the fluorosurfactant include surfactants described in paragraph 0033 of JP-A No. 2015-184410, and the above contents are incorporated herein.
Examples of the nonionic surfactant include surfactants described in paragraph 0034 of JP-A No. 2015-184410, and the above contents are incorporated in the present specification.
Examples of the cationic surfactant include surfactants described in paragraph 0035 of JP-A No. 2015-184410, and the above contents are incorporated herein.
Examples of the anionic surfactant include surfactants described in paragraph 0036 of JP-A-2015-184410, and the above contents are incorporated in the present specification.
Examples of the silicone-based surfactant include surfactants described in paragraph 0037 of JP-A-2015-184410, and the above contents are incorporated herein.

The content of the surfactant in the curable resin composition is not particularly limited, but is 0 to 10% by mass with respect to the total solid content of the curable resin composition in terms of ensuring sufficient hard coat properties. Preferably, 0 to 5% by mass is more preferable.
In addition, 1 type may be used independently or 2 or more types may be used together. When using 2 or more types of surfactant together, it is preferable that total content is in the said range.

  In addition to the above, the curable resin composition may contain other components as long as the effects of the present invention are exhibited. Examples of the other components include a polymerization inhibitor, an ultraviolet absorber, and an antioxidant.

  The curable resin composition can be prepared by mixing the above components. The mixing method and the order thereof are not particularly limited. For example, it can adjust with the method of dissolving each component with respect to the said solvent.

[Step b]
Step b is a step of curing the curable resin composition layer to form a hard coat layer.
Although it does not restrict | limit especially as a method of hardening a curable resin composition layer, For example, heat processing and / or exposure processing are mentioned.
Although it does not restrict | limit especially as an exposure process, For example, the aspect which irradiates the ultraviolet-ray of the irradiation amount of 10-1000 mJ / cm < ² > with an ultraviolet lamp, and hardens a coating film is mentioned.
In the case of ultraviolet irradiation, ultraviolet rays emitted from light rays such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp can be used.
Although it does not restrict | limit especially as temperature of heat processing, For example, 20-100 degreeC is preferable and 30-80 degreeC is more preferable.

[Step c]
Step c is a step of forming a retardation layer on the surface of the hard coat layer. The method of forming the retardation layer is not particularly limited, but the retardation layer composition layer is formed by coating the retardation layer composition on the surface of the hard coat layer, and the retardation layer composition layer is formed. It is preferable that it is process c1 which cures and forms a phase difference layer.
The method for applying the retardation layer composition on the surface of the hard coat layer is not particularly limited, and the method described above as the method for applying the curable resin composition can be used.

<Phase difference layer composition>
The composition for retardation layer contains a polymerizable liquid crystal compound 1.
The composition for retardation layer may contain a solvent, a polymerization initiator, a crosslinking agent, an alignment controller, a chiral agent, and the like as components other than the polymerizable liquid crystal compound 1. Below, each component which the composition for phase difference layers contains is demonstrated.

(Polymerizable liquid crystal compound 1)
The polymerizable liquid crystal compound 1 is not particularly limited as long as it is a liquid crystal compound containing a polymerizable group, and a known polymerizable liquid crystal compound can be used.
Examples of the polymerizable group include those described as the polymerizable group contained in the polymerizable compound.
Examples of the polymerizable group include an epoxy group, an aziridinyl group, and an ethylenically unsaturated group, and an ethylenically unsaturated group is more preferable.

  Among these, the polymerizable liquid crystal compound 1 preferably contains at least one group (polymerizable group) selected from the group consisting of an acryloyl group and a methacryloyl group in one molecule. The upper limit of the number of polymerizable groups is not particularly limited, but generally 6 or less is preferable.

  As the polymerizable liquid crystal compound 1, for example, Makromol. Chem. 190, 2255 (1989), Advanced Materials 5, 107 (1993), U.S. Pat. Nos. 4,683,327, 5,622,648, and 5,770,107, International Publication WO95 / 22586, WO95. / 24455, WO 97/00600, WO 98/23580, WO 98/52905, JP-A-1-272551, JP-A-6-16616, JP-A-7-110469, JP-A-11-80081, and JP Examples thereof include compounds described in JP-A No. 2001-328773.

As the polymerizable liquid crystal compound 1, a rod-like nematic liquid crystal compound can also be used.
Examples of rod-like nematic liquid crystal compounds include azomethines, azoxys, cyanobiphenyls, cyanophenyl esters, benzoic acid esters, cyclohexanecarboxylic acid phenyl esters, cyanophenylcyclohexanes, cyano-substituted phenylpyrimidines, alkoxy-substituted phenylpyrimidines. , Phenyldioxanes, tolanes, alkenylcyclohexylbenzonitriles and the like.

  Although it does not restrict | limit especially as molecular weight of the polymeric liquid crystal compound 1, Generally 500-1500 are preferable. The molecular weight is intended to be a molecular weight that can be calculated from the chemical structural formula.

Specific examples of the polymerizable liquid crystal compound 1 include the following compounds, but the polymerizable liquid crystal compound 1 is not limited to the following specific examples.

Moreover, the following compounds are mentioned as another specific example of a polymeric liquid crystal compound.

Although it does not restrict | limit especially as content of the polymeric liquid crystal compound 1 in the composition for phase difference layers, 80-99.9 mass% is preferable with respect to the total solid of the composition for phase difference layers, and 85-99. More preferable is 5% by mass.
In addition, the polymeric liquid crystal compound 1 may be used individually by 1 type, or may use 2 or more types together. When using 2 or more types of polymeric liquid crystal compound 1 together, it is preferable that total content is in the said range. In addition, when two or more kinds of polymerizable liquid crystal compounds 1 are used in combination, the alignment temperature described later can be lowered.

(Polymerization initiator)
It is preferable that the composition for retardation layers contains a polymerization initiator.
The polymerization initiator is not particularly limited, and a known polymerization initiator can be used.
As a polymerization initiator, the same polymerization initiator as what was demonstrated as a polymerization initiator which the said curable resin composition contains is mentioned.
Examples of the polymerization initiator include α-carbonyl compounds (described in US Pat. Nos. 2,367,661 and 2,367,670), acyloin ether (described in US Pat. No. 2,448,828), α-hydrocarbon substituted aromatics. An acyloin compound (described in US Pat. No. 2,722,512), a polynuclear quinone compound (described in US Pat. Nos. 3,046,127 and 2,951,758), a combination of a triarylimidazole dimer and p-aminophenyl ketone (US Pat. No. 3549367), acridine and phenazine compounds (JP-A-60-105667, US Pat. No. 4,239,850), oxadiazole compounds (US Pat. No. 4,221,970) and the like.

  Although it does not restrict | limit especially as content of the polymerization initiator in the composition for phase difference layers, When content of the polymeric liquid crystal compound 1 in the composition for phase difference layers is 100 mass parts, it is 0.1-10. Part by mass is preferred.

(Crosslinking agent)
The composition for retardation layer may contain a crosslinking agent. The crosslinking agent is a component different from the polymerization initiator.
A crosslinking agent has the effect | action which improves the mechanical strength of a phase difference layer obtained using the composition for phase difference layers, and durability.
The crosslinking agent is not particularly limited, and a known crosslinking agent can be used.
Examples of the crosslinking agent include polyfunctional acrylate compounds such as trimethylolpropane tri (meth) acrylate and pentaerythritol tri (meth) acrylate; epoxy compounds such as glycidyl (meth) acrylate and ethylene glycol diglycidyl ether; 2,2-bis Aziridine compounds such as hydroxymethylbutanol-tris [3- (1-aziridinyl) propionate] and 4,4-bis (ethyleneiminocarbonylamino) diphenylmethane; isocyanate compounds such as hexamethylene diisocyanate and biuret type isocyanate; side chain of oxazoline group A polyoxazoline compound having an alkoxysilane compound such as vinyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropyltrimethoxysilane, etc. That. Moreover, a well-known catalyst can be used according to the reactivity of a crosslinking agent.

  Although it does not restrict | limit especially as content of the crosslinking agent in the composition for phase difference layers, 0.001-20 when content of the polymeric liquid crystal compound 1 in the composition for phase difference layers is 100 mass parts. Part by mass is preferred.

(Orientation control agent)
It is preferable that the composition for retardation layers contains an orientation control agent.
The alignment controller is not particularly limited, and a known alignment controller can be used.
Examples of the orientation control agent include fluorine (meth) acrylate polymers described in paragraphs 0018 to 0043 of JP-A-2007-272185, and formulas (I) described in paragraphs 0031 to 0034 of JP-A-2012-203237. The compound etc. which are represented by-(IV) are mentioned.

Specific examples of the orientation control agent are shown below. However, the alignment control agent is not limited to the following specific examples.
Orientation control agent (1):

Orientation control agent (2):

  The content of the alignment control agent in the retardation layer composition is not particularly limited, but is 0.1 when the content of the polymerizable liquid crystal compound 1 in the retardation layer composition is 100 parts by mass. -5 mass parts is preferable. In addition, an orientation control agent may be used individually by 1 type, or may use 2 or more types together. When using 2 or more types of orientation control agents together, it is preferable that total content is in the said range.

<Method for forming retardation layer>
The retardation layer can be formed by coating the retardation layer composition on the surface of the hard coat layer to form a retardation layer composition layer and curing it.
The composition layer for retardation layers contains a polymerizable liquid crystal compound as described above. The retardation layer can be obtained by aligning the polymerizable liquid crystal compound in the composition layer for the retardation layer, then polymerizing the polymerizable liquid crystal compound, and fixing the alignment state.

The method for aligning the polymerizable liquid crystal compound is not particularly limited, and a known method can be used. Examples of the method for aligning the polymerizable liquid crystal compound include a method in which the retardation layer composition layer applied on the hard coat layer is heated and held for a certain period of time (hereinafter also referred to as “aging”). .
When aligning the polymerizable liquid crystal compound, the aging temperature is preferably 50 to 150 ° C., and the aging time is preferably 0.5 to 3 minutes.
When the polymerizable liquid crystal compound is cholesterically aligned, the aging temperature is preferably 50 to 150 ° C., and the aging time is preferably 0.5 to 3 minutes.

  By polymerizing the polymerizable liquid crystal compound aligned as described above, an alignment state can be fixed and a retardation layer having optical anisotropy can be obtained. As the polymerization method, the method described as the polymerization method of the curable resin composition can be used.

[Step d]
Step d is a step of rubbing the surface of the hard coat layer.
The rubbing treatment method is not limited, and a known rubbing treatment method can be used.
Examples of the rubbing treatment method include a method using a rubbing roller. As a rubbing method using a rubbing roller, for example, the method described in paragraph 0161 of JP-A-2006-085424 can be mentioned, and the above contents are incorporated in the present specification.

  The hard coat layer formed using the curable resin composition includes an alignment film region on the surface (interface opposite to the interface between the temporary support and the hard coat layer). Therefore, by rubbing the hard coat layer, the polymerizable liquid crystal compound can be easily oriented (for example, homogeneous orientation) in the phase difference layer composition layer formed in step c. In the present specification, homogeneous alignment means that the major axis of the polymerizable liquid crystal compound molecule and the film surface (film surface of the phase difference layer composition) are horizontal, but are strictly horizontal. In the present specification, it is assumed that the inclination angle with the horizontal plane is less than 30 degrees.

[Process e]
Step e is a step of forming a circularly polarized light reflecting layer on the surface of the retardation layer. As the step e, for example, a step of applying a composition for a circularly polarized light reflecting layer to form a composition layer for a circularly polarized light reflecting layer, curing the composition layer for a circularly polarized light reflecting layer, and forming a circularly polarized light reflecting layer Although e1 and the process e2 which laminates | stacks the circularly polarized light reflection layer produced separately on the surface of a phase difference layer are mentioned, the process e1 is preferable.
Hereinafter, step e1 will be described in detail.

It is preferable that the composition for circularly polarized light reflection layers contains the polymerizable liquid crystal compound 2 and a chiral agent.
The definition of the polymerizable liquid crystal compound 2 is synonymous with the polymerizable liquid crystal compound 1 described above.

(Chiral agent (optically active compound))
The composition for a circularly polarized light reflecting layer may contain a chiral agent. When the composition for a circularly polarized light reflecting layer contains a chiral agent, a helical structure of the cholesteric liquid crystal phase is induced and a cholesteric liquid crystal phase is easily obtained.
It does not restrict | limit especially as a chiral agent, A well-known chiral agent can be used.
As known chiral agents, for example, Liquid Crystal Device Handbook, Chapter 3-4-3, TN (Twisted Nematic), STN (Super-twisted nematic display) chiral agent, 199 pages, Japan Society for the Promotion of Science, 142nd Committee Hen, 1989, compounds such as isosorbide and isomannide derivatives can be used.

A chiral agent generally contains an asymmetric carbon atom, but an axially asymmetric compound or a planar asymmetric compound that does not contain an asymmetric carbon atom can also be used as the chiral agent. Examples of the axially asymmetric compound and the planar asymmetric compound include binaphthyl, helicene, paracyclophane, and derivatives thereof.
The chiral agent may have a polymerizable group. When the chiral agent has a polymerizable group, a polymer having a repeating unit derived from the polymerizable liquid crystal compound and a repeating unit derived from the chiral agent by a polymerization reaction between the polymerizable chiral agent and the polymerizable liquid crystal compound. Can be formed. In this aspect, the polymerizable group possessed by the polymerizable chiral agent is preferably the same group as the polymerizable group possessed by the polymerizable liquid crystal compound. Therefore, the polymerizable group of the chiral agent is also preferably an ethylenically unsaturated group, an epoxy group, or an aziridinyl group, and more preferably an ethylenically unsaturated group. The chiral agent may be a liquid crystal compound.

  It is preferable that the chiral agent has a photoisomerizable group because a pattern having a desired reflection wavelength corresponding to the emission wavelength can be formed by irradiation with a photomask such as actinic rays after coating and orientation. As the photoisomerization group, an isomerization site of a compound exhibiting photochromic properties, an azo group, an azoxy group, or a cinnamoyl group is preferable. Specific examples of the compound include JP 2002-80478, JP 2002-80851, JP 2002-179668, JP 2002-179669, JP 2002-179670, and JP 2002-2002. Use the compounds described in JP-A No. 179681, JP-A No. 2002-179682, JP-A No. 2002-338575, JP-A No. 2002-338668, JP-A No. 2003-313189, and JP-A No. 2003-313292. Can do. Moreover, as a commercial item, Paliocolor LC-756 (made by BASF Corporation) etc. are mentioned.

Although it does not restrict | limit especially as content of the chiral agent in the composition for circularly polarized light reflection layers, When content of the polymeric liquid crystal compound 2 in the composition for circularly polarized light reflection layers is 100 mass parts, it is 1-15. Part by mass is preferred.
A chiral agent may be used individually by 1 type, or may use 2 or more types together. When two or more kinds of chiral agents are used in combination, the total content is preferably within the above range.

  The aspect of the polymerizable compound 2 is the same as the aspect of the polymerizable compound 1 described above. The polymerizable compound 2 may be the same as or different from the polymerizable compound 1.

  When the production method of the transfer film includes step e, in step c, the aging temperature for forming the retardation layer is preferably 30 to 150 ° C., and the aging time is preferably 0.5 to 3 minutes. In this case, the aging temperature for forming the circularly polarized light reflecting layer is preferably 30 to 150 ° C., and preferably 0.5 to 3 minutes.

  Moreover, the formation method of the composition layer for circularly polarized light reflection layers and the aspect of the hardening method are the same as the aspect of the formation method of the composition layer for retardation layers.

  When the method for producing a transfer film includes step e, the retardation layer composition preferably contains the polymerizable liquid crystal compound 1 and does not contain a chiral agent. As, it is preferable to contain the polymerizable liquid crystal compound 2 and a chiral agent.

According to the above preferred embodiment, the retardation layer is likely to be a layer in which a liquid crystal phase obtained by homogenous alignment (for example, nematic alignment) of the polymerizable liquid crystal compound is fixed, and the circularly polarized reflective layer is formed of the polymerizable liquid crystal compound. Tends to be a layer in which a liquid crystal phase obtained by cholesteric alignment is fixed.
According to said suitable aspect, a circularly-polarized-light reflection layer has a function as a selective reflection layer mentioned later.

  In addition, in the manufacturing method of the said transfer film, the aspect which repeats the process e in multiple times is also preferable. In the embodiment in which the step e is repeated a plurality of times, the compositions for circularly polarized light reflecting layers used for forming each circularly polarized light reflecting layer may be the same or different.

Step f is a step of winding the transfer film into a roll.
Although it does not restrict | limit especially as a method to wind up a transfer film in roll shape, The aspect which winds a elongate transfer film around a cylindrical core is mentioned. The core is not particularly limited, and a known core can be used. Examples of the core include, for example, the cores described in paragraphs 0025 to 0039 of JP 2008-127191 A, paragraphs 0012 to 0021 of JP 2006-029503 A, etc. Incorporated in the description.
Moreover, as a method of winding a transfer film around a winding core, for example, the method described in paragraphs 0616 to 0036 of JP 2010-150041 A and the like are mentioned, and the above internal use is incorporated in the present specification.

  The transfer film manufacturing method according to the above embodiment may include other steps in addition to the above steps within the scope of the effects of the present invention. Examples of other steps include an adhesive layer forming step.

(Adhesive layer forming process)
The adhesive layer forming step is a step of forming an adhesive layer on the surface of the retardation layer or the circularly polarized light reflecting layer, and examples thereof include the following modes.
A step of forming an adhesive layer on the surface of the retardation layer or the circularly polarized light reflecting layer after the step c or step e and before the step f (step AD1)
-Step (step AD2) of forming an adhesive layer on the surface of the phase difference layer of the transfer film unwound from the core or the circularly polarized light reflection layer after step f

In the step AD1 and the step AD2, the method for forming the adhesive layer is not particularly limited. For example, the composition for the adhesive layer is applied on the surface of the retardation layer or the circularly polarized reflective layer (at least one). And may be applied to the entire surface, and may be applied to the entire surface). In addition, as a formation method of an adhesive bond layer, the aspect demonstrated as a formation method of curable resin composition layer is mentioned. Note that a release material may be further bonded to the surface of the adhesive layer formed by the above method. Although it does not restrict | limit especially as a peeling material, As the aspect, the aspect demonstrated as a temporary support body is mentioned.
Moreover, as a method of forming the adhesive layer, there is also a method in which an adhesive layer of an adhesive film provided with a release material and an adhesive layer in this order is bonded to the surface of the retardation layer or the circularly polarized reflective layer. Can be mentioned.

  Although it does not restrict | limit especially as a film thickness of the said adhesive bond layer, Generally 1-10 micrometers is preferable.

  The adhesive layer contains an adhesive. Adhesives include hot-melt type, thermosetting type, photo-curing type, reaction-curing type, and pressure-sensitive adhesive type that does not require curing from the viewpoint of curing method, and acrylate-based, urethane-based, urethane acrylate as materials, respectively. , Epoxy, epoxy acrylate, polyolefin, modified olefin, polypropylene, ethylene vinyl alcohol, vinyl chloride, chloroprene rubber, cyanoacrylate, polyamide, polyimide, polystyrene, and polyvinyl butyral Etc. can be used. From the viewpoint of workability and productivity, the photocuring type is preferable as the curing method, and from the viewpoint of optical transparency and heat resistance, it is preferable to use an acrylate, urethane acrylate, epoxy acrylate, or the like material.

-Adhesive layer composition The adhesive layer composition is not particularly limited, and a known adhesive layer composition can be used. Examples of the adhesive layer composition include an embodiment containing an adhesive layer compound containing a polymerizable group, a solvent, a polymerization initiator, and an alignment controller.
Although it does not restrict | limit especially as a compound for adhesive bond layers containing a polymeric group, From an optical transparency viewpoint, an acrylate type, a urethane acrylate type, or an epoxy acrylate type compound is preferable.
About a polymerization initiator, a solvent, and an orientation control agent, it is the same as that of the aspect already demonstrated.

[Transfer film]
The transfer film according to another embodiment of the present invention includes the following layers (1) to (3) in this order.
(1) Temporary support (2) Hard coat layer provided on one surface of the temporary support (3) Retardation layer provided on the surface of the hard coat layer Further, the hard coat layer comprises a monomer, and A hard coat layer obtained by curing a curable resin composition containing at least one selected from the group consisting of oligomers and a polymer containing a polymerizable group. Hereinafter, (2) and (3) are collectively referred to as an optical laminate.
Note that a plurality of retardation layers may be arranged.

(Preferred embodiment)
Moreover, the transfer film provided with the layer of the following (1)-(4) in this order as a preferable aspect of the said transfer film is mentioned.
(1) Temporary support (2) Hard coat layer provided on at least one surface of the temporary support (3) Retardation layer provided on the surface of the hard coat layer (4) On the surface of the retardation layer (4) A transfer film in which a plurality of circularly polarized reflective layers are further laminated on the surface of the retardation layer may be used.
An adhesive layer may be provided between (3) and (4) and between (4) and (4).

The transfer film may be further provided with an adhesive layer, or an adhesive layer and a release material on the outermost circularly polarizing reflection layer.
That is, the following aspects are mentioned as a specific structure of a transfer film. In addition, as a transfer film, it is not limited to the following aspects. In this paragraph, “/” represents a layer boundary, and the layers before and after the “/” are in direct contact with each other.
Temporary support / hard coat layer / retardation layer Temporary support / hard coat layer / retardation layer / adhesive layer Temporary support / hard coat layer / retardation layer / adhesive layer / release material / temporary support Body / hard coat layer / retardation layer / circularly polarizing reflection layer / temporary support / hard coat layer / retardation layer / circular polarization reflection layer / adhesive layer / temporary support / hard coat layer / retardation layer / circular polarization Reflective layer / adhesive layer / release material / temporary support / hard coat layer / retardation layer / circularly polarized reflective layer / circularly polarized reflective layer (may be a laminate of a plurality of circularly polarized reflective layers)
Temporary support / hard coat layer / retardation layer / circular polarization reflection layer / circular polarization reflection layer (may be a laminate of a plurality of circular polarization reflection layers) / adhesive layer / temporary support / hard coat layer / Retardation layer / circularly polarized light reflecting layer / circularly polarized light reflecting layer (may be a laminate of a plurality of circularly polarized light reflecting layers) / adhesive layer / release material

  The manufacturing method of the temporary support, the hard coat layer, the retardation layer, and the circularly polarized light reflection layer is as described above.

<Hard coat layer>
The material for forming the hard coat layer (curable resin composition) is the same as described above, and the method for forming the hard coat layer is also the same as described above.
Although it does not restrict | limit especially as a film thickness of a hard-coat layer, 2-10 micrometers is preferable at the point which ensures sufficient hard-coat performance.
The hard coat layer preferably has scratch resistance, and the hardness is not particularly limited, but is preferably H or higher in a pencil hardness test in accordance with JIS (Japanese Industrial Standards) K-5400. The above is preferable.

<Phase difference layer>
The retardation Re in the in-plane direction at a wavelength of 550 nm of the retardation layer is preferably 40 to 280 nm in terms of ensuring sufficient visible light transparency.
Here, the retardation Re in the in-plane direction at a wavelength of 550 nm can be obtained by an expression represented by Re = (nx−ny) × d. nx represents the refractive index in the in-plane slow axis direction of the optical anisotropic layer, ny represents the refractive index in the in-plane fast axis direction, nz represents the refractive index in the thickness direction, and d represents the film thickness.
In addition, as film thickness d of a phase difference layer, 100 nm-7 micrometers are preferable.

Examples of the retardation layer include a ¼ wavelength layer that functions as a ¼ wavelength plate (hereinafter, also simply referred to as “¼ wavelength plate”).
Examples of the quarter wavelength plate include a single layer type quarter wavelength plate, a broadband quarter wavelength plate in which a quarter wavelength plate and a half wavelength plate are laminated, and the like.
The front phase difference of the former ¼ wavelength plate may be a length that is ¼ of the emission wavelength of the image display device (when the optical laminate is attached to the image display device). Therefore, for example, when the emission wavelength of the image display device is 450 nm, 530 nm, and 640 nm, the wavelength of 450 nm is 112.5 nm ± 10 nm, preferably 112.5 nm ± 5 nm, more preferably 112.5 nm, and 530 nm. Reverse dispersion such that the phase difference is 160 nm ± 10 nm, preferably 160 nm ± 5 nm, more preferably 160 nm at a wavelength of 5 nm ± 10 nm, preferably 132.5 nm ± 5 nm, more preferably 132.5 nm, 640 nm Although the retardation layer is most preferable as a quarter wavelength plate, a retardation plate having a small retardation wavelength dispersion and / or a forward dispersion retardation plate can also be used. The reverse dispersion means a property that the absolute value of the phase difference becomes larger as the wavelength becomes longer, and the forward dispersion means a property that the absolute value of the phase difference becomes larger as the wavelength becomes shorter.

The laminated quarter-wave plate is bonded so that the angle between the slow axis of the quarter-wave plate and the slow axis of the half-wave plate is 60 °, and the half-wave plate side is It is arranged on the incident side of linearly polarized light, and the slow axis of the half-wave plate is used so as to intersect 15 ° or 75 ° with respect to the polarization plane of the incident linearly polarized light. Can be suitably used because of its good resistance.
In the present specification, the phase difference means frontal retardation. The phase difference can be measured using a polarization phase difference analyzer AxoScan manufactured by AXOMETRICS.

<Circularly polarized reflective layer>
The circularly polarized light reflection layer preferably includes at least one cholesteric liquid crystal layer exhibiting selective reflection in the visible light region. In the present specification, the cholesteric liquid crystal layer means a layer in which a cholesteric liquid crystal phase is fixed.
The circularly polarized light reflecting layer may include two or more cholesteric liquid crystal layers, and may include other layers such as an alignment layer. The circularly polarized light reflecting layer is preferably composed only of a cholesteric liquid crystal layer. Further, when the circularly polarized light reflection layer includes a plurality of cholesteric liquid crystal layers, it is preferable that they are in direct contact with adjacent cholesteric liquid crystal layers. The circularly polarized light reflection layer preferably includes three or more cholesteric liquid crystal layers such as three layers and four layers.
The thickness of the circularly polarized light reflection layer is preferably 2.0 to 300 μm, and more preferably 8.0 to 200 μm.

  The cholesteric liquid crystal phase selectively reflects the circularly polarized light of either the right circularly polarized light or the left circularly polarized light in a specific wavelength range and exhibits circularly polarized light selective reflection that transmits the circularly polarized light of the other sense. Are known. In this specification, the circularly polarized light selective reflection is sometimes simply referred to as selective reflection.

  In this specification, “sense” for circularly polarized light means right circularly polarized light or left circularly polarized light. The sense of circularly polarized light is right-handed circularly polarized light when the electric field vector tip turns clockwise as time increases when viewed as the light travels toward you, and left when it turns counterclockwise. Defined as being circularly polarized.

  In this specification, the term “sense” may be used for the twist direction of the spiral of the cholesteric liquid crystal. The selective reflection by the cholesteric liquid crystal reflects right circularly polarized light when the twist direction (sense) of the cholesteric liquid crystal spiral is right, transmits left circularly polarized light, and reflects left circularly polarized light when the sense is left, Transmits circularly polarized light.

  The cholesteric liquid crystal layer may be a layer in which the orientation of the liquid crystal compound in the cholesteric liquid crystal phase is maintained. Typically, the polymerizable liquid crystal compound is placed in the orientation state of the cholesteric liquid crystal phase and then irradiated with ultraviolet rays. Any layer may be used as long as it is polymerized and cured by heating or the like to form a layer having no fluidity and simultaneously changed to a state in which the orientation is not changed by an external field or an external force. In the cholesteric liquid crystal layer, it is sufficient that the optical properties of the cholesteric liquid crystal phase are maintained in the layer, and the liquid crystalline compound in the layer may no longer exhibit liquid crystallinity. For example, the polymerizable liquid crystal compound may have a high molecular weight due to a curing reaction and may no longer have liquid crystallinity.

The central wavelength λ of selective reflection of the cholesteric liquid crystal layer depends on the pitch P (= spiral period) of the helical structure in the cholesteric liquid crystal phase, and follows the relationship between the average refractive index n of the cholesteric liquid crystal layer and λ = n × P. In this specification, the central wavelength λ of selective reflection of the cholesteric liquid crystal layer means a wavelength at the center of gravity of the reflection peak of the circularly polarized reflection spectrum measured from the normal direction of the cholesteric liquid crystal layer. In the present specification, the center wavelength of selective reflection means the center wavelength when measured from the normal direction of the cholesteric liquid crystal layer.
As can be seen from the above equation, the center wavelength of selective reflection can be adjusted by adjusting the pitch of the helical structure. The center wavelength λ can be adjusted in order to selectively reflect either the right circularly polarized light or the left circularly polarized light with respect to light having a desired wavelength by adjusting the n value and the P value.

  Since the pitch of the cholesteric liquid crystal phase depends on the kind of chiral agent used together with the polymerizable liquid crystal compound or the concentration of the chiral agent, the desired pitch can be obtained by adjusting these. For the method of measuring spiral sense and pitch, use the methods described in “Introduction to Liquid Crystal Chemistry Experiments”, edited by the Japanese Liquid Crystal Society, Sigma Publishing 2007, page 46, and “Liquid Crystal Handbook”, Liquid Crystal Handbook Editorial Committee page 196. be able to.

The full width at half maximum Δλ (nm) of the selective reflection band showing selective reflection depends on the relationship of Δλ = Δn × P, where Δλ depends on the birefringence Δn of the liquid crystal compound and the pitch P. Therefore, the width of the selective reflection band can be controlled by adjusting Δn. Δn can be adjusted by adjusting the kind of the polymerizable liquid crystal compound and the mixing ratio thereof, or by controlling the temperature at the time of fixing the alignment.
In order to form one type of cholesteric liquid crystal layer having the same central wavelength of selective reflection, a plurality of cholesteric liquid crystal layers having the same period P and the same spiral sense may be stacked. By laminating cholesteric liquid crystal layers having the same period P and the same spiral sense, the circularly polarized light selectivity can be increased at a specific wavelength.

  Hereinafter, the present invention will be described in more detail based on examples. The materials, amounts used, ratios, processing details, processing procedures, and the like shown in the following examples can be changed as appropriate 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 following examples.

[Preparation of temporary support]
A PET (polyethylene terephthalate) film having a thickness of 50 μm was prepared and used as a temporary support.

[Preparation of Curable Resin Composition HC-1]
Curable resin composition HC-1 (corresponding to curable resin composition) was obtained by mixing the components shown in Table 2. In addition, it diluted with MEK (methyl ethyl ketone) / cyclohexanone = 95/5 (mass / mass) solution so that solid content concentration of curable resin composition HC-1 might be 50 mass%.
The symbol (P-3) in the polymer column in Table 2 corresponds to P-3 in the examples of polymers shown in Table 1 above.

[Preparation of composition R-1 for retardation layer]
The retardation layer composition R-1 (corresponding to the retardation layer composition) was obtained by mixing the components shown in Table 3. In addition, it diluted with MEK / cyclohexanone = 95/5 solution so that solid content concentration of composition R-1 for phase difference layers might be 21 mass%.
The symbols in the column 1 of the polymerizable liquid crystal compound in Table 3 correspond to the symbols in the examples of the polymerizable liquid crystal compound described above.

[Preparation of circularly polarizing reflective layer composition CP-1]
The composition for circularly polarized light reflection layer CP-1 (corresponding to the composition for a circularly polarized light reflective layer) was obtained by mixing the components shown in Table 4. In addition, it diluted with MEK / cyclohexanone = 95/5 solution so that solid content concentration of composition CP-1 for circularly polarized light reflection layers might be 28 mass%.

[Preparation of Adhesive Layer Composition AD-1]
Adhesive layer composition AD-1 (corresponding to the adhesive layer composition) was obtained by mixing the components shown in Table 5. In addition, it diluted with MEK / cyclohexanone = 95/5 solution so that solid content concentration of composition AD-1 for adhesive layers might be 30 mass%.

In addition, each abbreviation in a table | surface represents the following components.
・ A-TMPT (manufactured by Shin-Nakamura Chemical Co., Ltd., trimethylolpropane triacrylate)
・ GH-1203 (made by Shin-Nakamura Chemical Co., Ltd., acrylate polymer)

[Example 1]
[Formation of hard coat layer]
A temporary support (PET film) is fixed to a glass substrate, and using a spin coater, the curable resin composition HC-1 is applied on the temporary support at 800 rpm for 10 seconds, and a curable resin composition layer is provided. A temporary support was obtained. Subsequently, the temporary support with the curable resin composition layer was dried on a hot plate at 70 ° C. for 30 seconds, and then irradiated with UV (ultraviolet) at a light amount of 30 mJ / cm ² using a high-pressure mercury lamp under air. A hard coat layer having a thickness of 5.1 μm was obtained. Subsequently, the obtained hard coat layer was rubbed with a rubbing apparatus to obtain a rubbed hard coat layer HC-1 formed on the surface of the temporary support.

[Retardation layer R-1: Formation of retardation layer]
The hard coat layer HC-1 obtained above is fixed to a glass substrate together with the temporary support, and the retardation layer composition R-1 is applied on the hard coat layer HC-1 at 4000 rpm for 10 seconds using a spin coater. The composition layer R-1 for retardation layer was formed on the surface of the hard coat layer HC-1 (hereinafter referred to as “laminated body” in this paragraph). Subsequently, the above laminate was dried on a hot plate at 80 ° C. for 30 seconds, and then irradiated with UV (ultraviolet) at a light intensity of 300 mJ / cm ² using a high-pressure mercury lamp in a nitrogen atmosphere with an oxygen concentration of 300 ppm or less. And the transfer film 1 provided with the temporary support body, hard-coat layer HC-1, and retardation layer R-1 in this order was obtained.

[Circularly Polarized Reflective Layer CP-1: Formation of Circularly Polarized Reflective Layer]
The transfer film 1 obtained above was fixed to a glass substrate, and using a spin coater, the composition CP-1 for circularly polarized light reflecting layer was applied on the retardation layer R-1 at 500 rpm for 10 seconds to obtain the retardation. A composition layer CP-1 for circularly polarized light reflecting layer was formed on the surface of the layer R-1 (hereinafter referred to as “laminate” in this paragraph). Subsequently, the laminate was dried on a hot plate at 85 ° C. for 60 seconds, and then irradiated with UV (ultraviolet) at a light amount of 300 mJ / cm ² using a high-pressure mercury lamp in the air. A transfer film 2 provided with a coat layer HC-1, a retardation layer R-1, and a circularly polarizing reflection layer CP-1 in this order was obtained.

<Transfer of transfer film 2 to acrylic plate>
The transfer film 2 obtained above was fixed to a glass substrate, and using a spin coater, the adhesive layer composition AD-1 was applied on the circularly polarizing reflective layer CP-1 at 1000 rpm for 10 seconds. Moreover, composition AD-1 for adhesive bond layers was apply | coated for 10 second at 1000 rpm on the acrylic board of thickness 1mm.
The transfer film 2 coated with the adhesive layer composition AD-1 and the acrylic plate coated with the adhesive layer composition AD-1 were both dried on a hot plate at 60 ° C. for 60 seconds, Both adhesive layer composition AD-1 application surfaces were overlapped and bonded using a roller to obtain a bonded body. This bonded body was heated on a hot plate at 85 ° C. for 30 seconds, and then irradiated with UV at a light amount of 300 mJ / cm ² using a high-pressure mercury lamp in a nitrogen atmosphere with an oxygen concentration of 300 ppm or less. After cooling a sample to room temperature, the temporary support body of the outermost surface was peeled off using tweezers, and the transfer body to the acrylic board of the transfer film 2 was obtained.

(Evaluation of orientation state)
<Orientation state: retardation layer>
The surface of the transfer film 1 produced above was confirmed with a polarizing microscope, and it was examined whether nematic orientation was observed in the retardation layer R-1. The results were evaluated according to the following criteria, and the evaluation results are shown in Table 6. In practice, B or higher is preferable.

A: Uniform nematic orientation was observed.
B: Generation of defects was observed during nematic alignment.
C: A non-oriented state.

<Orientation state: circularly polarized light reflection layer>
The surface of the transfer film 2 produced above was confirmed with a polarizing microscope, and it was examined whether cholesteric orientation was observed in the circularly polarized light reflecting layer CP-1. The results were evaluated according to the following criteria, and the evaluation results are shown in Table 6. In practice, B or higher is preferable.

A: Uniform cholesteric orientation was observed.
B: Generation of defects was observed during cholesteric alignment.
C: A non-oriented state. (Circularly polarized reflection could not be confirmed.)

〔Pencil hardness〕
About the transfer body to the acrylic board of the transfer film 2, the pencil hardness test according to JISK-5400 was done. The results are shown in Table 6.

Except having used the component shown in Table 6, it is the same as that of Example 1, and the transfer film 1, the transfer film 2, and the transfer body to the acrylic board of the transfer film 2 which concern on each Example shown in Table 6 were used. Obtained. The results of the same evaluation as in Example 1 are shown in Table 6.
In addition, the symbol of the polymer column in Table 6 mentioned later respond | corresponds to the symbol in the illustration of the polymer shown in Table 1 mentioned above.

[Comparative Example 1]
Transfer film 1 and transfer film in the same manner as in Example 1 except that the alignment film component in the hard coat layer of Example 1 was changed to a homopolymer of n-butyl methacrylate (P-20, Mw = 25,000). 2. A transfer body of transfer film 2 to an acrylic plate was obtained. The results of the same evaluation as in Example 1 are shown in Table 6.

[Comparative Example 2]
Transfer film 1 and transfer film in the same manner as in Example 1 except that the alignment film component in the hard coat layer of Example 1 was changed to a homopolymer of n-butyl acrylate (P-21, Mw = 25,000). 2. A transfer body of transfer film 2 to an acrylic plate was obtained. The results of the same evaluation as in Example 1 are shown in Table 6.

[Comparative Example 3]
Transfer film 1 and transfer film in the same manner as in Example 1, except that the alignment film component in the hard coat layer of Example 1 was changed to Acrybase MH-101-5 (Fujikura Kasei Co., Ltd., Mw = 200,000). The transfer body to the acrylic board of the film 2 and the transfer film 2 was obtained. The results of the same evaluation as in Example 1 are shown in Table 6.
Acrybase MH-101-5 does not contain a polymerizable group.

From the results shown in Table 6, the curable resin composition contains at least one polymerizable compound selected from the group consisting of a monomer and an oligomer, and a polymer containing a polymerizable group. The transfer films obtained by the method for producing transfer films of Examples 1 to 7 were provided with a retardation layer having an excellent orientation state. On the other hand, the transfer film obtained by the manufacturing method of the transfer film of Comparative Examples 1-3 did not have a desired effect.
The transfer film obtained by the production method of the transfer film of Example 4 in which the weight average molecular weight of the polymer is more than 20000 is more excellent than the transfer film obtained by the production method of the transfer film of Example 5. A retardation layer having a different orientation state was provided.
The transfer film obtained by the production method of the transfer film of Example 2 having a ΔSP value exceeding 1.3 has a molecular weight of the polymer as compared with the transfer film obtained by the production method of the transfer film of Example 6. In the same case, a retardation layer having a better orientation state was provided. This is presumably because when the ΔSP value exceeds 1.3, the polymer containing a polymerizable group is likely to be unevenly distributed in the upper region of the curable resin composition layer.

Claims (26)

A step a of applying a curable resin composition on one surface of the temporary support to form a curable resin composition layer; and
A step b of curing the curable resin composition layer to form a hard coat layer;
A step c of forming a retardation layer on the surface of the hard coat layer,
The curable resin composition is
At least one polymerizable compound selected from the group consisting of monomers and oligomers;
A polymer containing a polymerizable group;
The manufacturing method of the transfer film containing this.   The method for producing a transfer film according to claim 1, wherein the polymerizable compound is non-liquid crystalline and contains three or more polymerizable groups in one molecule. The polymerizable compound contains 4 or more polymerizable groups in one molecule, and the weight average molecular weight is 10,000 or less,
The method for producing a transfer film according to claim 2, wherein the polymerizable group is at least one selected from the group consisting of an acryloyl group and a methacryloyl group. The manufacturing method of the transfer film as described in any one of Claims 1-3 in which the said polymer contains the repeating unit represented by Formula (1).

In formula (1), R ₁ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, P ₁ represents a monovalent group containing an ethylenically unsaturated group, L ₁ represents a single bond, Or a bivalent coupling group is represented. In the repeating unit represented by the formula (1), R ₁ is a hydrogen atom or a methyl group,
P ₁ is a monovalent group containing a group selected from the group consisting of an acryloyl group, a methacryloyl group, a maleimide group, and a styryl group,
L ₁ is —O—, an alkylene group, an arylene group, * —C (═O) O—, * —C (═O) NH—, * —OC (═O) —, * —NHC (═O) — And the manufacturing method of the transfer film of Claim 4 which is group which combined these.
In addition, * represents the position connected to the main chain.   The manufacturing method of the transfer film as described in any one of Claims 1-5 whose weight average molecular weights of the said polymer are more than 20000. The manufacturing method of the transfer film as described in any one of Claims 1-6 whose (DELTA) SP calculated | required by Formula (2) is more than 1.3.
Formula (2) ΔSP = δa (M) −δa (P)
In formula (2), δa (M) represents a non-dispersing force component in the three-dimensional solubility parameter of the polymerizable compound,
In formula (2), δa (P) represents a non-dispersing force component in the three-dimensional solubility parameter of the polymer.   The method for producing a transfer film according to any one of claims 1 to 7, further comprising a step d of rubbing the surface of the hard coat layer between the step b and the step c. Step c is
On the surface of the hard coat layer, applying a retardation layer composition to form a retardation layer composition layer;
Curing the retardation layer composition layer to form a retardation layer;
Containing
The method for producing a transfer film according to claim 1, wherein the composition for retardation layer contains a polymerizable liquid crystal compound 1.   The method for producing a transfer film according to claim 9, wherein the polymerizable liquid crystal compound 1 contains at least one group selected from the group consisting of an acryloyl group and a methacryloyl group in one molecule. .   The manufacturing method of the transfer film as described in any one of Claims 1-10 which further contains the process e of forming a circularly-polarized-light reflection layer on the surface of the said phase difference layer. The step e is a step of forming a circularly polarized reflective layer by applying a circularly polarized reflective layer composition to form a circularly polarized reflective layer composition layer, curing the circularly polarized reflective layer composition layer, and forming a circularly polarized reflective layer. Yes,
The circularly polarizing reflective layer composition contains a polymerizable liquid crystal compound 2 and a chiral agent,
The method for producing a transfer film according to claim 11, wherein the polymerizable liquid crystal compound 2 contains two or more groups selected from the group consisting of an acryloyl group and a methacryloyl group in one molecule. .   Furthermore, the manufacturing method of the transfer film as described in any one of Claims 1-10 containing the process f which winds up the said transfer film in roll shape after the said process c.   Furthermore, the manufacturing method of the transfer film of Claim 11 or 12 containing the process f which winds up the said transfer film in roll shape after the said process e. A temporary support;
A hard coat layer provided on one surface of the temporary support;
The retardation layer provided on the surface of the hard coat layer, and in this order,
The hard coat layer is
At least one polymerizable compound selected from the group consisting of monomers and oligomers;
A transfer film, which is a hard coat layer obtained by curing a curable resin composition containing a polymer containing a polymerizable group.   The transfer film according to claim 15, wherein the polymerizable compound is non-liquid crystalline and contains 3 or more polymerizable groups in one molecule. The polymerizable compound contains 4 or more polymerizable groups in one molecule, and the weight average molecular weight is 10,000 or less,
The transfer film according to claim 16, wherein the polymerizable group is at least one selected from the group consisting of an acryloyl group and a methacryloyl group. The transfer film according to claim 15, wherein the polymer contains a repeating unit represented by the formula (1).

In formula (1), R ₁ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, P ₁ represents a monovalent group containing an ethylenically unsaturated group, L ₁ represents a single bond, Or a bivalent coupling group is represented. In the repeating unit represented by the formula (1), R ₁ is a hydrogen atom or a methyl group,
P ₁ is a monovalent group containing a group selected from the group consisting of an acryloyl group, a methacryloyl group, a maleimide group, and a styryl group,
L ₁ is —O—, an alkylene group, an arylene group, * —C (═O) O—, * —C (═O) NH—, * —OC (═O) —, * —NHC (═O) — The transfer film according to claim 18, which is a group obtained by combining these.
In addition, * represents the position connected to the main chain.   The transfer film according to any one of claims 15 to 19, wherein the polymer has a weight average molecular weight of more than 20000. The transfer film according to any one of claims 15 to 20, wherein ΔSP obtained by the formula (2) is more than 1.3.
Formula (2) ΔSP = δa (M) −δa (P)
In formula (2), δa (M) represents a non-dispersing force component in the three-dimensional solubility parameter of the polymerizable compound,
In formula (2), δa (P) represents a non-dispersing force component in the three-dimensional solubility parameter of the polymer. The retardation layer is a retardation layer obtained by curing a composition for a retardation layer containing the polymerizable liquid crystal compound 1,
The said polymerizable liquid crystal compound 1 contains at least one group selected from the group consisting of an acryloyl group and a methacryloyl group in two or more groups in one molecule. The transfer film as described.   The transfer film as described in any one of Claims 15-22 provided with a circularly-polarized-light reflective layer on the surface of the said phase difference layer. The circularly polarized light reflecting layer is obtained by curing the composition for a circularly polarized light reflecting layer,
The circularly polarizing reflective layer composition contains a polymerizable liquid crystal compound 2 and a chiral agent,
The transfer film according to claim 23, wherein the polymerizable liquid crystal compound 2 contains at least one group selected from the group consisting of an acryloyl group and a methacryloyl group in one molecule.   The transfer film roll containing a winding core and the transfer film as described in any one of Claims 15-24 wound up by the said winding core in roll shape. Containing at least one polymerizable compound selected from the group consisting of a monomer and an oligomer, and a polymer containing a polymerizable group,
The polymerizable compound is a curable resin composition that is non-liquid crystalline and contains three or more polymerizable groups in one molecule.