JP2014203265A - Manufacturing method for image display device and image display device manufactured by manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method for an image display device having a polymer layer between an image display part and a light transmissive protective part or a touch sensor part, the method being able to cope with a case where a bonding machine has no portion having light transmissivity equal to or higher than that of the entire surface of the light transmissive protective part or touch sensor, and being able to provide a beautiful image.SOLUTION: A polymerizable composition is interposed between an image display part 2 and a light transmissive protective part 3 or touch sensor part, the polymerizable composition containing a compound having a (meta) acryloyl group and α- hydroxy alkylphenone photoinitiator and having 500 to 5,000 mPa-s viscosity at 25°C. Light is emitted to part of the light transmissive protective part or touch sensor part beyond a bonding machine. Part of the polymerizable composition is polymerized (temporarily polymerized), and then taken out from the bonding machine. Using an exposure machine, light is emitted to the entire surface of the light transmissive protective part or touch sensor part, thereby performing polymerization (main polymerization).

Description

  The present invention relates to a method for manufacturing an image display device such as a liquid crystal display device used in, for example, a smartphone or a tablet PC, and an image display device manufactured by the method.

Conventionally, as this type of image display device, for example, a liquid crystal display device 101 shown in FIG. 9 is known.
As shown in FIG. 9, the liquid crystal display device 101 has a transparent protective part 103 made of, for example, glass or plastic on a liquid crystal display panel 102.
In this case, in order to protect the surface of the liquid crystal display panel 102 and a polarizing plate (not shown), a gap 104 is provided between the liquid crystal display panel 102 and the protective portion 103 by interposing a spacer 104 between the protective portion 103. Is provided.
However, the presence of the gap 105 between the liquid crystal display panel 102 and the protection unit 103 causes light scattering, resulting in a decrease in contrast and brightness, and the presence of the gap 105 hinders thinning of the panel. It has become.
In view of such a problem, it has also been proposed to fill a gap between the liquid crystal display panel and the protective portion (see FIG. 1) (for example, Patent Document 1).

  In recent years, smartphones are becoming mainstream in mobile phones, and devices called tablet PCs are rapidly spreading. Such devices are generally equipped with a capacitive touch panel. As an example of a capacitive touch panel, a polymer (layer) filled between the touch sensor 7 and the protection unit 3 in the out-cell capacitive touch panel display shown in FIG. 2 or FIG. 2 and the polymer 5a shown in FIG. 3 (layer)), the polymer (layer) filled between the display unit 2 and the touch sensor 7 (the polymer 5b shown in FIGS. 2 and 3 (layer) )), A polymer (layer) filled between the display unit 2 and the touch center integrated protection unit 3 in the cover glass-touch center integrated type capacitive touch panel display (FIGS. 4 and 5). 5b polymer (layer)), a polymer (layer) filled between the display unit 2 having the touch center on the surface and the protective unit 3 in the on-cell capacitive touch panel display device (layer) ( Polymer (layer) 5a described in FIG. And a polymer (layer) filled between the display unit 2 having the touch center on the surface and the protection unit 3 in the in-cell capacitive touch panel display device (polymerization of 5a described in FIGS. 7 and 8) Product (layer)).

  The production method of these polymers (layers) can be broadly divided into, for example, a display between a touch sensor and a protection unit in an out-cell capacitive touch panel display device as described in Patent Document 2. Between the touch panel and the touch sensor, between the display unit in the cover glass-touch center integrated type capacitive touch panel display and the touch center integrated protection unit, in the on-cell type capacitive touch panel display A polymerizable composition is provided between the display unit having the touch center on the surface and the protection unit, or between the display unit having the touch center in the in-cell capacitive touch panel display device and the protection unit. A method of manufacturing an image display device comprising a step of interposing, irradiating ultraviolet rays, and polymerizing the polymerizable composition to form a polymer layer; Between the touch sensor and the protection unit in the display device equipped with a touch panel, between the display unit and the touch sensor, and between the display unit and the touch center in the capacitive touch panel display device integrated with the cover glass-touch center. Between the protective part, between the display part having the touch center in the on-cell capacitive touch panel display device and the protective part, or in the in-cell capacitive touch panel display device. For example, there is a method for manufacturing an image display device including a step of bonding between the display unit and the protection unit included in the optical unit using an optical adhesive sheet as described in Patent Document 3, for example.

  In the former method, between the base having the image display unit of the image display device and the translucent protection unit, between the base having the image display unit of the image display device and the translucent touch sensor unit, or transparent. A polymerizable composition is interposed between the light-sensitive touch sensor portion and the light-transmitting protective portion, and the light-sensitive protective portion and / or light-transmitting property is obtained by using a bonding machine or the like to obtain a predetermined thickness. A method for manufacturing an image display device has a process in which an entire surface of the touch sensor unit is irradiated with light using an exposure device to polymerize a polymerizable composition to form a polymer layer.

However, when a predetermined thickness is obtained using a bonding machine, it is desirable to irradiate the entire surface of the translucent protective part and / or the translucent touch sensor part through the bonding machine. However, in that case, it is necessary to use a laminating machine having a translucent part equal to or greater than the entire surface of the translucent protective part or translucent touch sensor part in the laminating machine. As the size increases, the design of the laminating machine becomes difficult. If the laminating machine does not have a translucent part equal to or greater than the entire surface of the translucent protective part or translucent touch sensor part, the translucent protection is passed through the laminating machine. Since it becomes difficult to irradiate the entire surface of the part and / or the translucent touch sensor part with light, the pre-polymerized article with the polymerizable composition interposed is taken out from the laminating machine and used with an exposure machine. Then, light is applied to the entire surface of the translucent protective part or the translucent touch sensor part. However, in order to take out the article interposing the polymerizable composition before polymerization from the laminating machine, there is a drawback that the polymerizable composition before polymerization leaks from the article or the thickness accuracy is impaired. It was.
The above problems of the prior art will be described in more detail with reference to FIG. A laminating machine 12 is superposed on the article 11 with the polymerizable composition before polymerization interposed therebetween, so that the article 11 has a predetermined thickness (step b). In addition, 12 is the figure which looked at the bonding machine from the upper part, and means the upper surface of the bonding part of a bonding machine. 13 is a translucent part. The article 11 having a predetermined thickness using the laminator 12 is released from the superposition and taken out from the laminator 12 (step d). The article 11 taken out from the bonding machine 12 is irradiated with light on the entire surface of the translucent protective part or translucent touch sensor part of the article 11 using the lamp 14 of the exposure machine (step e). . By this light irradiation, the polymerizable composition is polymerized, and the image display device 1 in which the polymer layer is interposed is obtained. In the image display device 1 shown in (f), a portion with a dot pattern indicates a portion where the polymerizable composition is polymerized. The problem with this prior art is that the polymerizable composition is still liquid after the article 11 is removed from the laminating machine 12 in step d and before the light irradiation is performed in step e. Leaks, or the thickness changes and the thickness accuracy is impaired.

JP 2005-55641 A JP 2009-186958 A JP 2012-2333060 A

The present invention has been made in view of the above-mentioned problems of the prior art, and the laminating machine has a translucent part equivalent to or more than the entire surface of the translucent protective part or translucent touch sensor part. It is an object of the present invention to provide a novel method for manufacturing an image display device that can provide a beautiful image even if it does not have the function.
Furthermore, an object of this invention is to provide the image display apparatus manufactured by this image display apparatus manufacturing method.

  As a result of repeated research to solve the above-mentioned problems, the inventors of the present invention have a base portion having an image display portion of an image display device and a base portion having an image display portion of the image display device. A laminating machine in which a polymerizable composition is interposed in at least one location selected from among a translucent touch sensor unit and between a translucent touch sensor unit and a translucent protective unit Then, a part of the translucent protective part and / or the translucent touch sensor part is irradiated with light, and the part irradiated with the light of the interposed polymerizable composition is polymerized (temporary polymerization). Thereafter, the test sample before polymerization with the polymerizable composition interposed is taken out from the laminating machine, and light is applied to the entire surface of the translucent protective part and / or translucent touch sensor part using an exposure machine. By performing polymerization (main polymerization) by irradiation, the laminating machine Even if it does not have a light-transmitting part equivalent to or more than the entire surface of the light-sensitive protective part or the light-transmitting touch sensor part, it can be applied. Furthermore, as the photopolymerizable composition, a specific compound can be used. In the polymer after the main polymerization, a boundary line (generated by a difference in refractive index is formed in the vicinity of the boundary between the place where the pre-polymerization is performed and the place where the pre-polymerization is not performed. As a result, it has been found that a beautiful image can be provided without generating a line, and the present invention has been completed.

That is, the present invention (I) is provided between the base having the image display unit of the image display device and the translucent protection unit, and between the base having the image display unit of the image display device and the translucent touch sensor unit. And a step of interposing the polymerizable composition in at least one location selected from between the translucent touch sensor part and the translucent protective part,
The polymerizable composition is partially irradiated by irradiating a part of the polymerizable composition with light through at least one translucent part selected from the translucent protective part and the translucent touch sensor part. Partially polymerized by irradiating light on the entire surface of at least one translucent part selected from the translucent protective part and the translucent touch sensor part A method for producing an image display device comprising a step of polymerizing a polymerizable composition comprising: a polymerizable composition comprising:
(Component 1) A polymerizable composition comprising at least one compound selected from the group consisting of a compound having an acryloyl group and a compound having a methacryloyl group, and (Component 2) an α-hydroxyalkylphenone photopolymerization initiator. The present invention relates to a method for producing an image display device, wherein the viscosity at 25 ° C. is 500 to 5000 mPa · s.
The present invention (II) relates to an image display device that can be manufactured by the method for manufacturing an image display device of the present invention (I).

Furthermore, the present invention relates to the following [1] to [14].
[1] Between the base having the image display unit of the image display device and the translucent protective unit, between the base having the image display unit of the image display device and the translucent touch sensor unit, and translucent A step of interposing the polymerizable composition in at least one location selected from between the touch sensor portion and the translucent protective portion,
The polymerizable composition is partially irradiated by irradiating a part of the polymerizable composition with light through at least one translucent part selected from the translucent protective part and the translucent touch sensor part. Partially polymerized by irradiating light on the entire surface of at least one translucent part selected from the translucent protective part and the translucent touch sensor part A method for producing an image display device comprising a step of polymerizing a polymerizable composition comprising: a polymerizable composition comprising:
(Component 1) containing at least one compound selected from the group consisting of a compound having an acryloyl group and a compound having a methacryloyl group, and (Component 2) an α-hydroxyalkylphenone photopolymerization initiator and having a polymerizable composition The manufacturing method of the image display apparatus characterized by the viscosity of 25 degreeC of a thing being 500-5000 mPa * s.
[2] Polymerizing composition by irradiating a part of polymerizable composition with light through at least one translucent part selected from translucent protective part and translucent touch sensor part In the step of partially polymerizing the product, the amount of light irradiation is 10 to 1000 mJ / cm ² in terms of the integrated light amount measured using an ultraviolet integrated light meter that detects 365 nm. [1] A method for manufacturing an image display device according to item 1.
[3] The polymerizable composition further comprises:
(Component 3) The method for producing an image display device according to [1] or [2], comprising an acylphosphine oxide photopolymerization initiator.
[4] The method for manufacturing an image display device according to [3], wherein the ratio of the component 2 and the component 3 is 50:50 to 95: 5 by mass ratio.
[5] Component 1 is
At least one polymer compound selected from the group consisting of a acryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000 and a methacryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000; and a molecular weight of 500 or less The image display device according to any one of [1] to [4], comprising at least one compound selected from the group consisting of a acryloyl group-containing compound and a methacryloyl group-containing compound having a molecular weight of 500 or less. Production method.
[6] Component 1 is
From urethane acrylate, urethane methacrylate, polyisoprene acrylate, polyisoprene methacrylate, polybutadiene acrylate, polybutadiene methacrylate, hydrogenated polyisoprene acrylate, hydrogenated polyisoprene methacrylate, hydrogenated polybutadiene acrylate and hydrogenated polybutadiene methacrylate And at least one polymer selected from the group consisting of, and at least one compound selected from the group consisting of an acryloyl group-containing compound having a molecular weight of 500 or less and a methacryloyl group-containing compound having a molecular weight of 500 or less. The method for manufacturing an image display device according to any one of [1] to [4].
[7] At least one compound selected from the group consisting of an acryloyl group-containing compound having a molecular weight of 500 or less and a methacryloyl group-containing compound having a molecular weight of 500 or less,
An acrylate having a hydrocarbon group having 8 to 18 carbon atoms, a methacrylate having a hydrocarbon group having 8 to 18 carbon atoms, a compound selected from the group consisting of an acrylate having an ether bond and a methacrylate having an ether bond, and an acrylamide compound The method for producing an image display device according to [5] or [6], further comprising a compound selected from the group consisting of: a methacrylamide compound, an alcoholic hydroxyl group-containing acrylate, and an alcoholic hydroxyl group-containing methacrylate.
[8] The polymerizable composition further comprises:
(Component 4) An acryloyl group, a methacryloyl group, a function of inhibiting radical polymerization, a compound composed of carbon atoms and hydrogen atoms having neither a function of inhibiting radical polymerization nor a function of initiating photopolymerization, and an acryloyl group, methacryloyl At least one compound selected from the group consisting of a compound composed of a carbon atom, a hydrogen atom, and an oxygen atom, which does not have any of a group, a function of inhibiting radical polymerization, a function of inhibiting radical polymerization, and a function of initiating photopolymerization The method for manufacturing an image display device according to any one of [1] to [7], comprising:
[9] Component 4 is
The method for producing an image display device according to [8], comprising at least one compound selected from the group consisting of a compound that is liquid at 25 ° C and a compound that is solid at 25 ° C.
[10] Component 4 includes a compound that is liquid at 25 ° C.
The compound that is liquid at 25 ° C.
Poly (α-olefin) liquid, ethylene-propylene copolymer liquid, ethylene-α-olefin copolymer liquid, propylene-α-olefin copolymer liquid, liquid polybutene, liquid hydrogenated polybutene, liquid polybutadiene At least one compound selected from the group consisting of liquid hydrogenated polybutadiene, liquid polyisoprene, liquid hydrogenated polyisoprene, liquid polybutadiene polyol, liquid hydrogenated polybutadiene polyol, liquid polyisoprene polyol and liquid hydrogenated polyisoprene polyol. [9] The method for manufacturing an image display device according to [9].
[11] Component 4 includes a compound that is liquid at 25 ° C.
The compound that is liquid at 25 ° C.
The method for producing an image display device according to [9], comprising at least one compound selected from the group consisting of polyether polyol, polyester polyol and polycarbonate polyol.
[12] Component 4 includes a compound that is liquid at 25 ° C.
The compound that is liquid at 25 ° C. is liquid poly (α-olefin) liquid, ethylene-propylene copolymer liquid, ethylene-α-olefin copolymer liquid, propylene-α-olefin copolymer liquid. And at least one compound selected from the group consisting of liquid polybutene, liquid hydrogenated polybutene, liquid hydrogenated polybutadiene, liquid hydrogenated polyisoprene, liquid hydrogenated polybutadiene polyol and liquid hydrogenated polyisoprene polyol. The method for manufacturing an image display device according to [9].
[13] Component 4 comprises a compound that is solid at 25 ° C.
The compound that is solid at 25 ° C. includes at least one compound selected from the group consisting of hydrogenated petroleum resins, terpene-based hydrogenated resins, and hydrogenated rosin esters. Manufacturing method of image display apparatus.
[14] An image display device that can be manufactured by the method for manufacturing an image display device according to any one of [1] to [13].

  According to the method for producing an image display device of the present invention, the light-transmitting protective part and / or part of the light-transmitting touch sensor part is irradiated with light through a bonding machine, and The part irradiated with light is polymerized (preliminary polymerization), and then the article interposing the partially polymerized polymerizable composition is taken out from the laminating machine, and the light-transmitting protective part is used using an exposure machine. Alternatively, when polymerization is performed by irradiating light on the entire surface of the translucent touch sensor part (main polymerization), in the polymer after the main polymerization, a place where the pre-polymerization is performed and a place where the pre-polymerization is not performed are performed. A boundary line (a line generated due to a difference in refractive index) is not generated in the vicinity of the boundary, and as a result, a beautiful and uniform image display device can be produced.

FIG. 1 is a cross-sectional view showing a main part of an embodiment of a display device according to the present invention. FIG. 2 is a cross-sectional view showing a main part of an embodiment of the display device according to the present invention. FIG. 3 is a cross-sectional view showing a main part of an embodiment of the display device according to the present invention. FIG. 4 is a cross-sectional view showing a main part of an embodiment of the display device according to the present invention. FIG. 5 is a cross-sectional view showing a main part of an embodiment of the display device according to the present invention. FIG. 6 is a cross-sectional view showing a main part of an embodiment of the display device according to the present invention. FIG. 7 is a cross-sectional view showing a main part of an embodiment of a display device according to the present invention. FIG. 8 is a cross-sectional view showing a main part of an embodiment of a display device according to the present invention. FIG. 9 is a cross-sectional view showing a main part of a display device according to the prior art. FIG. 10 is a diagram showing an outline of the manufacturing process of the display device according to the prior art. FIG. 11 is a diagram showing an outline of the manufacturing process of the display device according to the present invention.

First, an outline of a method for manufacturing an image display device of the present invention will be described with reference to FIG. However, the present invention is not limited to the one shown in FIG. FIG. 11 is a diagram showing an outline of the manufacturing process of the display device according to the present invention.
First, between the base having the image display unit of the image display device and the translucent protection unit, between the base having the image display unit of the image display device and the translucent touch sensor unit, and translucent An article 11 is produced in which a polymerizable composition is interposed in at least one location selected from between the touch sensor portion and the translucent protective portion, and the polymerizable composition before polymerization is interposed. A laminating machine 12 having a translucent portion 13 is superposed on an article 11 having a polymerizable composition before polymerization interposed therebetween, so that the article 11 has a predetermined thickness (step b). In addition, 12 is the figure which looked at the bonding machine from the upper part, and means the upper surface of the bonding part of a bonding machine. Next, light is irradiated to a part of the translucent protective part and / or the translucent touch sensor part through the laminating machine 12 using the provisional exposure lamp 15, and the polymerizable composition is partially applied. Is polymerized (preliminary polymerization) (step c). The article 11 having a predetermined thickness using the laminating machine 12 and interposing the polymerizable composition including a partially polymerized portion is released from the superposition and taken out from the laminating machine 12 (step d). ). In the article 11 shown in the step d, a portion with a dot pattern indicates a portion where the polymerizable composition is polymerized. The article 11 taken out from the bonding machine 12 is then applied to the entire surface of the translucent protective part and / or the translucent touch sensor part of the article 11 using a lamp 14 in a conveyor type or other large exposure machine. Light is irradiated (step e). By this light irradiation, the entire surface of the polymerizable composition is polymerized, and the image display device 1 in which the polymer layer is interposed is obtained.

Hereinafter, the present invention will be specifically described.
First, the present invention (I) will be described.
The present invention (I) is between the base having the image display unit of the image display device and the translucent protection unit, between the base having the image display unit of the image display device and the translucent touch sensor unit, And a step of interposing a polymerizable composition in at least one location selected from between the translucent touch sensor part and the translucent protective part,
The polymerizable composition is partially irradiated by irradiating a part of the polymerizable composition with light through at least one translucent part selected from the translucent protective part and the translucent touch sensor part. Partially polymerized by irradiating light on the entire surface of at least one translucent part selected from the translucent protective part and the translucent touch sensor part A method for producing an image display device comprising a step of polymerizing a polymerizable composition comprising: a polymerizable composition comprising:
(Component 1) A polymerizable composition comprising at least one compound selected from the group consisting of a compound having an acryloyl group and a compound having a methacryloyl group, and (Component 2) an α-hydroxyalkylphenone photopolymerization initiator. The viscosity of 25 ° C. is 500 to 5000 mPa · s.

First, between the base having the image display unit of the image display device and the translucent protection unit, between the base having the image display unit of the image display device and the translucent touch sensor unit, and translucent The process of interposing a polymerizable composition in at least one location selected from between the touch sensor portion and the translucent protective portion will be described.
Note that “between the base portion having the image display portion of the image display device and the translucent protective portion” described in this specification refers to, for example, the portion 5b in FIGS. 1, 4, and 5, or FIG. This means the part 5a in FIG. Further, “between the base having the image display unit of the image display device and the translucent touch sensor unit” described in the present specification means, for example, the 5b unit in FIGS. 2 and 3. “Between the translucent touch sensor unit and the translucent protective unit” described in the document means, for example, the portion 5a in FIGS.

Between the base having the image display unit of the image display device and the translucent protection unit, between the base having the image display unit of the image display device and the translucent touch sensor unit, and the translucent touch sensor There is no particular limitation on the method of interposing the polymerizable composition in at least one place selected from between the part and the translucent protective part.
When the polymerizable composition is interposed between the base having the image display unit of the image display device and the translucent protective unit, the polymerizable composition is placed on the base having the image display unit of the image display device. Even if it is applied and then the base polymerizable composition coating surface having the image display part of the image display device is brought into contact with the bonding surface of the translucent protective part via the polymerizable composition, the light transmitting property The polymerizable composition is applied onto the bonding surface of the protective part, and then the polymerizable composition application surface of the translucent protective part and the base bonding surface having the image display part of the image display device are provided. There is no particular limitation even if the contact is made via the polymerizable composition.
In addition, the polymerizable composition-coated surface of the base having the image display portion of the image display device and the bonding surface of the light-transmitting protective portion, or the polymerization of the light-transmitting protective portion are interposed via the polymerizable composition. The polymerizable composition is applied even when the polymerizable composition-coated surface is brought into contact with the surface of the image display device having the image display portion of the image display device in contact. There is no particular limitation even if the contacted portion is made to be the lower surface, and there is no particular limitation.
Further, after the contact, the polymerizable composition between the base portion having the image display portion of the image display device and the translucent protective portion is spread to adjust the thickness of the polymerizable composition to a desired thickness. However, there is no particular limitation, even if it is expanded only by its own weight placed on the upper surface, or may be expanded by applying pressure from the outside.
In the case where a polymerizable composition is interposed between the base having the image display unit of the image display device and the translucent touch sensor unit, or between the translucent touch sensor unit and the translucent protective unit. This is the same as the case where the polymerizable composition is interposed between the base portion having the image display portion of the image display device and the translucent protective portion, and there is no particular limitation.
In addition, a bonding machine is generally used for the bonding. However, in the present invention, it is not essential to use a bonding machine, and it does not matter if this step is performed without using a bonding machine.

Next, the polymerizable composition is irradiated by irradiating a part of the polymerizable composition with light through at least one translucent part selected from the translucent protective part and the translucent touch sensor part. The process of partially polymerizing the product will be described.
The lamp used in this step is not particularly limited as long as component 2 and component 3 described below contain a component 3, and the component 2 and component 3 can emit light capable of being exposed to light. For example, a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure UV lamp, a deep UV lamp, a xenon lamp, or the like can be used.

  Further, in this step, a part of the polymerizable composition is irradiated with light through at least one translucent part selected from the translucent protective part and the translucent touch sensor part. . "Part" here is less than the total area of the filled polymerizable composition and the time from the start of the next process described later after this process, the bonded protective part, touch sensor part, This means that the area of the image display device having an image display unit may be an area that does not shift. In this step, generally, it is preferable to irradiate 3 to 70% with respect to the total area of the filled polymerizable composition, more preferably 4 to 65%, and still more preferably 5 to 60%. It is. When only 3% of the total area of the filled polymerizable composition is irradiated with light, a protective part and a touch sensor part bonded together in the time from the start of the next process described later after this process. However, it is preferable that the base portion having the image display portion of the image display device may be displaced or the polymerizable composition in the portion not irradiated with light may flow and flow out from the edge of the bonded surface. Absent. In addition, it is possible to irradiate 70% or more of light with respect to the total area of the filled polymerizable composition when the bonding area is small, but when the bonding area is large, bonding is performed. It will be a major restriction in the design of the machine, or irradiating such a large area through the lid of the laminating machine will also require a large-scale exposure machine, which is practical I can't say that.

In addition, the light irradiation amount used in this step is a value of integrated light amount measured using an ultraviolet integrated light meter that detects 365 nm, and is preferably 10 to 1000 mJ / cm ² , more preferably 100. It is -900 mJ / cm < ² >, More preferably, it is 130-800 mJ / cm < ² >. The amount of light irradiation in this step is a value of the integrated light amount measured using an ultraviolet integrated light meter that detects 365 nm. When the amount is less than 10 mJ / cm ² , provisional polymerization does not proceed as much as necessary. Sometimes it is not preferable. In addition, when the integrated light quantity value measured using an ultraviolet integrated light meter that detects 365 nm is more than 1000 mJ / cm ² , depending on the composition of the polymerizable composition, the position at which provisional polymerization is performed and the provisional light quantity A boundary line (a line generated by a difference in refractive index) may be generated in the vicinity of the boundary where the polymerization is not performed, which is not preferable.
In addition, “the value of the integrated light amount measured using an ultraviolet integrated light meter that detects 365 nm” described in this specification refers to the integrated value measured using an ultraviolet integrated light meter UIT-250 manufactured by USHIO INC. It is the value of the amount of light.

In addition, the illuminance of light used in this step is an illuminance value measured using an ultraviolet integrated photometer that detects 365 nm, and is preferably 10 to 400 mW / cm ² , more preferably 30 to 300 mW. / Cm ² , more preferably 50 to 200 mW / cm ² . When it is less than 10 mW / cm ² , the illuminance is insufficient, and depending on the type of the polymerizable composition, the illuminance necessary for polymerization may be insufficient, which is not preferable. The illuminance of light used in this step is energy observed using an illuminometer that detects 365 nm. When the illuminance is greater than 400 mW / cm ² , the reaction rate is 90 depending on the type of the polymerizable composition. May be less than%, which is not preferable.
As used herein, “the value of illuminance measured using an ultraviolet integrated light meter that detects 365 nm” refers to the illuminance measured using an ultraviolet integrated light meter UIT-250 manufactured by USHIO INC. Value.

Next, the polymerizability including a partially polymerized portion by irradiating the entire surface of at least one translucent part selected from the translucent protective part and the translucent touch sensor part The process of polymerizing the composition will be described.
The lamp used in this step is not particularly limited as long as component 2 and component 3 described below contain a component 3, and the component 2 and component 3 can emit light capable of being exposed to light. For example, a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure UV lamp, a deep UV lamp, a xenon lamp, or the like can be used. In addition, the irradiation area of the lamp is larger than the entire surface of the translucent protective part or translucent touch sensor part, or the translucent protective part or translucent touch such as a conveyor type exposure machine. It is preferable to use an apparatus that can irradiate light on the entire surface of the sensor unit in a short time.

The irradiation amount of light in this step, the energy observed by using an ultraviolet integration actinometer for detecting the 365 nm, is preferably 1000~10000mJ / cm ^2, more preferably 1500~9000mJ / cm ² More preferably, it is 2000-8000 mJ / cm < ² >. As such an ultraviolet integrated light meter that detects 365 nm, for example, an ultraviolet integrated light meter UIT-250 manufactured by USHIO INC. Can be cited.

Next, the polymerizable composition used in the method for producing the image display device of the present invention (I) will be described.
The polymerizable composition used in the method for producing an image display device of the present invention (I) has a viscosity at 25 ° C. of 500 to 5000 mPa · s, preferably 650 to 4700 mPa · s, more preferably 800 to 4500 mPa · s. s. When the viscosity of the polymerizable composition at 25 ° C. is less than 500 mPa · s, the polymerizable composition is applied to the upper surface of the base portion having the protective part, the touch sensor part or the image display part, and the coated surface is applied. In the case of adopting a method of reversing and making it the lower surface and pasting with the other part used for pasting, the liquid may flow down from the coated surface when it is reversed. In addition, when the polymerizable composition is applied to the base having the protective part, the touch sensor part or the image display part and the other part used for bonding is pressed from above, the applied polymerizable composition is used. Will flow due to the weight of the polymerizable composition, and when the other part used for bonding is pressed from above, air is entrained and bubbles remain in the bonded one. . In the case where the viscosity of the polymerizable composition at 25 ° C. is higher than 5000 mPa · s, the flowability of the polymerizable composition after the two parts used for bonding are overlapped with each other via the polymerizable composition In particular, when the bonding area is large, it takes a long time to spread the polymerizable composition over the entire bonding surface, which is not preferable.
The viscosity described in the present specification is a viscosity measured using a cone / plate viscometer (manufactured by Brookfield, model: DV-II + Pro, spindle model number: CPE-42) at a rotation speed of 5 rpm. Is the value of

Next, component 1 which is a component of the polymerizable composition used in the method for producing the image display device of the present invention (I) will be described.
Component 1 is at least one compound selected from the group consisting of a compound having an acryloyl group and a compound having a methacryloyl group.
Component 1 is a compound having either or both of an acryloyl group and a methacryloyl group in the molecule.
However, the viscosity at 25 ° C. of the polymerizable composition containing Component 1 as described above must be 500 to 5000 mPa · s. Therefore, in order to satisfy these conditions easily, Component 1 is made up of a group consisting of an acryloyl group-containing polymer compound having a number average molecular weight of 1000 to 40000 and a methacryloyl group-containing polymer compound having a number average molecular weight of 1000 to 40000. It is preferable to use at least one selected from the group consisting of at least one polymer compound selected and an acryloyl group-containing compound having a molecular weight of 500 or less and a methacryloyl group-containing compound having a molecular weight of 500 or less.
At least one polymer compound selected from the group consisting of an acryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000 and a methacryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000 is 25 ° C. The viscosity of is often much greater than 500 mPa · s. By using these polymer compounds in combination with at least one compound selected from the group consisting of acryloyl group-containing compounds having a molecular weight of 500 or less and methacryloyl group-containing compounds having a molecular weight of 500 or less, The viscosity at 25 ° C. of the polymerizable composition used in the method for producing an image display device can be adjusted to 500 to 5000 mPa · s.

  In terms of materials, urethane acrylate, urethane methacrylate, polyisoprene acrylate, polyisoprene methacrylate, polybutadiene acrylate, polybutadiene methacrylate, hydrogenated polyisoprene acrylate, hydrogenated polyisoprene methacrylate, hydrogenated polybutadiene At least one polymer compound selected from the group consisting of acrylates and hydrogenated polybutadiene methacrylates, and at least one selected from the group consisting of acryloyl group-containing compounds having a molecular weight of 500 or less and methacryloyl group-containing compounds having a molecular weight of 500 or less. It is preferable to use a combination of seed compounds.

Urethane acrylate is a compound having one or more urethane bonds and having one or more acrylate groups.
As the urethane acrylate, polyester polyol urethane acrylate, polyisoprene urethane acrylate, polybutadiene urethane acrylate and hydrogenated polyisoprene urethane acrylate are preferable.

Urethane methacrylate is a compound having one or more urethane bonds and having one or more methacrylate groups.
As the urethane methacrylate, polyester polyol urethane methacrylate, polyisoprene urethane methacrylate, polybutadiene urethane methacrylate and hydrogenated polyisoprene urethane methacrylate are preferably used.

The polyisoprene acrylate is a compound having a polyisoprene structure and an acrylate group in the molecule.
As the polyisoprene-based acrylate, a hydroxyl group-containing acrylate adduct of isoprene-maleic anhydride copolymer, an esterified product of polyisoprene polyol and acrylic acid, a transesterification product of polyisoprene polyol and acrylic acid ester, etc. are preferably used. Is done.

The polyisoprene methacrylate is a compound having a polyisoprene structure and a methacrylate group in the molecule.
As the polyisoprene methacrylate, a hydroxyl group-containing methacrylate adduct of isoprene-maleic anhydride copolymer, an esterified product of polyisoprene polyol and methacrylic acid, a transesterification product of polyisoprene polyol and methacrylic acid ester, etc. are preferably used. Is done. Commercially available products include Claprene UC-102 and UC-203 (manufactured by Kuraray Co., Ltd.), which are methacryloyl group-containing compounds having a polyisoprene structural unit.

The polybutadiene acrylate is a compound having a polybutadiene structure and an acrylate group in the molecule.
As the polybutadiene acrylate, a hydroxyl group-containing acrylate adduct of a butadiene-maleic anhydride copolymer, an esterified product of polybutadiene polyol and acrylic acid, a transesterification product of polybutadiene polyol and acrylic ester, and the like are preferably used. Examples of commercially available products include NISSO-PB TEA-1000 (manufactured by Nippon Soda Co., Ltd.), which is an acrylate having a polybutadiene structural unit.

The polybutadiene-based methacrylate is a compound having a polybutadiene structure and a methacrylate group in the molecule.
As the polybutadiene-based methacrylate, a hydroxyl group-containing methacrylate adduct of a butadiene-maleic anhydride copolymer, an esterified product of polybutadiene polyol and methacrylic acid, a transesterification product of polybutadiene polyol and methacrylic ester, and the like are preferably used. Examples of commercially available products include NISSO-PB TE-2000 (manufactured by Nippon Soda Co., Ltd.), which is a methacrylate having a polybutadiene structural unit.

A hydrogenated polyisoprene acrylate is a compound having a hydrogenated polyisoprene structure and an acrylate group in the molecule.
Esterification product of hydrogenated polyisoprene polyol and acrylic acid, transesterification product of hydrogenated polyisoprene polyol and acrylic acid ester, addition product of hydrogenated polyisoprene polyol and isocyanato group-containing acrylate, hydrogenated polyisoprene polyol, polyisocyanate An adduct of an alcoholic hydroxyl group-containing acrylate is preferably used.

The hydrogenated polyisoprene methacrylate is a compound having a hydrogenated polyisoprene structure and a methacrylate group in the molecule.
Hydrogenated polyisoprene polyol and esterification product of methacrylic acid, transesterification reaction product of hydrogenated polyisoprene polyol and methacrylic acid ester, addition product of hydrogenated polyisoprene polyol and isocyanato group-containing methacrylate, hydrogenated polyisoprene polyol, polyisocyanate An adduct of an alcoholic hydroxyl group-containing methacrylate is preferably used.

The hydrogenated polybutadiene acrylate is a compound having a hydrogenated polybutadiene structure and an acrylate group in the molecule.
Hydrogenated polybutadiene polyol and esterification product of acrylic acid, transesterification product of hydrogenated polybutadiene polyol and acrylic acid ester, addition product of hydrogenated polybutadiene polyol and isocyanato group-containing acrylate, hydrogenated polybutadiene polyol, polyisocyanate and alcoholic hydroxyl group Adducts of containing acrylates are preferably used. Examples of commercially available products include NISSO-PB TEAI-1000 (manufactured by Nippon Soda Co., Ltd.), which is an acrylate having a polybutadiene structural unit.

The hydrogenated polybutadiene methacrylate is a compound having a hydrogenated polybutadiene structure and a methacrylate group in the molecule.
Hydrogenated polybutadiene polyol and esterification product of methacrylic acid, transesterification product of hydrogenated polybutadiene polyol and methacrylate ester, addition product of hydrogenated polybutadiene polyol and isocyanate group-containing methacrylate, hydrogenated polybutadiene polyol, polyisocyanate and alcoholic hydroxyl group An adduct of the containing methacrylate is preferably used.

The acryloyl group-containing compound having a molecular weight of 500 or less is a compound having an acryloyl group in one molecule and having a molecular weight of 500 or less.
Examples of the acryloyl group-containing compound having a molecular weight of 500 or less include cyclohexyl acrylate, isobornyl acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyethyl acrylate, dicyclopentanyl acrylate, dicyclopentanyl ethyl acrylate, 4-tert- Acrylates having a cyclic aliphatic group such as butylcyclohexyl acrylate and isobornyl methacrylate, hexyl acrylate, lauryl acrylate, isononyl acrylate, 2-propylheptyl acrylate, 4-methyl-2-propylhexyl acrylate, isooctadecyl acrylate, 2- Acrylate having chain aliphatic group such as heptyl undecyl acrylate, methoxyethyl acrylate, diethyleneglycol Rumonoethyl ether acrylate, phenoxyethyl acrylate, 3-methyl-3-oxetanylmethyl acrylate, 1,4-dioxaspiro [4.5] dec-2-ylmethyl acrylate, (2-methyl-2-ethyl-1,3- Dioxolan-4-yl) methyl acrylate and other acrylates having an ether bond in the molecule, α-acryloxy-γ-butyrolactone and other cyclic ester-containing compounds, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 3 -Hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 4-hydroxybutyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3- (o-phenylphenoxy) propyl Acrylate, 2-hydroxyethylacrylamide, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, 4-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 2- Alcohol-containing hydroxyl group-containing acrylate such as hydroxy-3- (o-phenylphenoxy) propyl methacrylate, N, N-dimethylacrylamide, N, N-diethylacrylamide, N-acryloylmorpholine, N-isopropylacrylamide, N-tert-butyl Acrylamide, N-methoxymethylacrylamide, N-ethoxymethylacrylamide, Nn-butoxymethylacrylamide, N- And the like acrylamide compounds such as Su Wu butoxy methyl acrylamide.
The lower limit of the molecular weight of the acryloyl group-containing compound is not limited, but the molecular weight of the acryloyl group-containing compound is preferably 86 or more.

The methacryloyl group-containing compound having a molecular weight of 500 or less is a compound having a molecular weight of 500 or less having a methacryloyl group in one molecule.
Examples of the methacryloyl group-containing compound having a molecular weight of 500 or less include isobornyl methacrylate, dicyclopentenyl methacrylate, dicyclopentenyloxyethyl methacrylate, dicyclopentanyl methacrylate, dicyclopentanyl ethyl methacrylate, and 4-tert-butylcyclohexyl methacrylate. Chain aliphatic groups such as methacrylate, lauryl methacrylate, isononyl methacrylate, 2-propylheptyl methacrylate, 4-methyl-2-propylhexyl methacrylate, isooctadecyl methacrylate, 2-heptylundecyl methacrylate, etc. Methacrylate, methoxyethyl methacrylate, diethylene glycol monoethyl ether methacrylate, phenoxy Ethyl methacrylate, 3-methyl-3-oxetanylmethyl methacrylate, 1,4-dioxaspiro [4.5] dec-2-ylmethyl methacrylate, (2-methyl-2-ethyl-1,3-dioxolan-4-yl) Methacryloyl group-containing compounds having a cyclic ester such as methacrylate having an ether bond in the molecule such as methyl methacrylate, α-methacryloxy-γ-butyrolactone, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl methacrylate, 2 -Hydroxybutyl methacrylate, 4-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 2-hydroxy-3- (o-phenylphenoxy) propyl methacrylate, etc. Lucol hydroxyl group-containing methacrylate, N, N-dimethylmethacrylamide, N, N-diethylmethacrylamide, N-methacryloylmorpholine, N-isopropylmethacrylamide, N-tert-butylmethacrylamide, N-methoxymethylmethacrylamide, N Examples thereof include methacrylamide compounds such as -ethoxymethyl methacrylamide, Nn-butoxymethyl methacrylamide, N-isobutoxymethyl methacrylamide, and the like.
The lower limit of the molecular weight of the methacryloyl group-containing compound is not limited, but the molecular weight of the methacryloyl group-containing compound is preferably 100 or more.

Preferred combinations among these acryloyl group-containing compounds having a molecular weight of 500 or less and methacryloyl group-containing compounds having a molecular weight of 500 or less are:
(A) Cyclohexyl acrylate, isobornyl acrylate, dicyclopentenyl acrylate, dicyclopentenyl oxyethyl acrylate, dicyclopentanyl acrylate, dicyclopentanyl ethyl acrylate, 4-tert-butylcyclohexyl acrylate, isobornyl methacrylate, hexyl It has a C8-C18 hydrocarbon group such as acrylate, lauryl acrylate, isononyl acrylate, 2-propylheptyl acrylate, 4-methyl-2-propylhexyl acrylate, isooctadecyl acrylate, 2-heptylundecyl acrylate, etc. Acrylate, isobornyl methacrylate, dicyclopentenyl methacrylate, dicyclopentenyloxyethyl methacrylate, dicyclo Pentanyl methacrylate, dicyclopentanylethyl methacrylate, 4-tert-butylcyclohexyl methacrylate, lauryl methacrylate, isononyl methacrylate, 2-propylheptyl methacrylate, 4-methyl-2-propylhexyl methacrylate, isooctadecyl methacrylate, 2-heptylun Methacrylate having 8 to 18 carbon atoms such as decyl methacrylate, methoxyethyl acrylate, diethylene glycol monoethyl ether acrylate, phenoxyethyl acrylate, 3-methyl-3-oxetanylmethyl acrylate, 1,4-dioxaspiro [4 .5] dec-2-ylmethyl acrylate, (2-methyl-2-ethyl-1,3-dioxolan-4-yl) methyl Acrylate having ether bond such as acrylate and methoxyethyl methacrylate, diethylene glycol monoethyl ether methacrylate, phenoxyethyl methacrylate, 3-methyl-3-oxetanylmethyl methacrylate, 1,4-dioxaspiro [4.5] dec-2-ylmethyl methacrylate A compound selected from the group consisting of methacrylates having an ether bond, such as (2-methyl-2-ethyl-1,3-dioxolan-4-yl) methyl methacrylate;
(B) N, N-dimethylacrylamide, N, N-diethylacrylamide, N-acryloylmorpholine, N-isopropylacrylamide, N-tert-butylacrylamide, N-methoxymethylacrylamide, N-ethoxymethylacrylamide, Nn Acrylamide compounds such as butoxymethylacrylamide and N-isobutoxymethylacrylamide, N, N-dimethylmethacrylamide, N, N-diethylmethacrylamide, N-methacryloylmorpholine, N-isopropylmethacrylamide, N-tert-butyl Such as methacrylamide, N-methoxymethyl methacrylamide, N-ethoxymethyl methacrylamide, Nn-butoxymethyl methacrylamide, N-isobutoxymethyl methacrylamide Luamide compounds, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 3-hydroxypropyl acrylate, 2-hydroxybutyl acrylate, 4-hydroxybutyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 2-hydroxy-3- (O-phenylphenoxy) propyl acrylate, 2-hydroxyethyl acrylamide, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, 4-hydroxybutyl methacrylate, 2-hydroxy-3 Alcohols such as phenoxypropyl methacrylate and 2-hydroxy-3- (o-phenylphenoxy) propyl methacrylate Hydroxyl group-containing acrylate, and 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, 4-hydroxybutyl methacrylate, 2-hydroxy-3-phenoxypropyl methacrylate, 2-hydroxy It is preferable to use in combination a compound selected from the group consisting of alcoholic hydroxyl group-containing methacrylates such as -3- (o-phenylphenoxy) propyl methacrylate.
By using the above-mentioned compounds in combination, coloring of the polymer in the image display device of the present invention (II) described later can be suppressed and polymerization in the image display device of the present invention (II) described later can be suppressed. The whitening phenomenon under high temperature and high humidity can be suppressed.

  From the acrylate having the hydrocarbon group having 8 to 18 carbon atoms, the methacrylate having the hydrocarbon group having 8 to 18 carbon atoms, the acrylate having the ether bond, and the methacrylate having the ether bond. A preferred use ratio of the compound selected from the group consisting of the compound selected from the group consisting of the acrylamide compound, the methacrylamide compound, the alcoholic hydroxyl group-containing acrylate and the alcoholic hydroxyl group-containing methacrylate is a mass ratio. 40:60 to 90:10, more preferably 45:55 to 85:15, and particularly preferably 50:50 to 80:20. From the acrylate having the hydrocarbon group having 8 to 18 carbon atoms, the methacrylate having the hydrocarbon group having 8 to 18 carbon atoms, the acrylate having the ether bond, and the methacrylate having the ether bond. The use ratio of the compound selected from the group consisting of the compound selected from the group consisting of the acrylamide compound, the methacrylamide compound, the alcoholic hydroxyl group-containing acrylate and the alcoholic hydroxyl group-containing methacrylate from 40:60 If it is small, the water resistance of the polymer may deteriorate. In addition, the acrylate having the hydrocarbon group having 8 to 18 carbon atoms, the methacrylate having the hydrocarbon group having 8 to 18 carbon atoms, the acrylate having the ether bond, and the ether bond. The use ratio of the compound selected from the group consisting of methacrylate and the compound selected from the group consisting of the acrylamide compound, the methacrylamide compound, the alcoholic hydroxyl group-containing acrylate and the alcoholic hydroxyl group-containing methacrylate is 90: If it is greater than 10, whitening of the polymer under high temperature and high humidity may occur, which is not preferable.

  The usage-amount of the component 1 in the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I) is 25-75 mass% with respect to the total amount which combined the component 1 and the below-mentioned component 4 Is more preferable, 30 to 70% by mass is more preferable, and 35 to 65% by mass is particularly preferable. When the amount of component 1 used is less than 25% by mass based on the total amount of component 1 and component 4 described below, the coating strength of the polymer obtained by polymerizing the polymerizable composition is insufficient. This is not preferable. When the amount of component 1 used is more than 75% by mass with respect to the total amount of component 1 and component 4 described later, the volume shrinkage during polymerization becomes too large, and the polarizing plate is distorted, or A large stress is generated at the interface between the bonded portion and the polymer, and as a result, the adhesion strength between the bonded portion and the polymer may be lowered, which is not preferable.

  In addition, in Component 1, a polymer compound selected from the group consisting of an acryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000 and a methacryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000, The use ratio of the compound selected from the group consisting of an acryloyl group-containing compound having a molecular weight of 500 or less and a methacryloyl group-containing compound having a molecular weight of 500 or less is preferably 45:55 to 85:15, and more preferably. The mass ratio is 50:50 to 80:20. A polymer compound selected from the group consisting of an acryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000 and a methacryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000, and an acryloyl group containing a molecular weight of 500 or less When the use ratio of the compound selected from the group consisting of the compound and the methacryloyl group-containing compound having a molecular weight of 500 or less is less than 45:55 in terms of mass ratio, the volume shrinkage during polymerization becomes too large, or the polymerization It may not be preferable because the coating strength of the product may be insufficient. A polymer compound selected from the group consisting of an acryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000 and a methacryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000; and an acryloyl compound having a molecular weight of 500 or less. When the use ratio of the compound selected from the group consisting of a group-containing compound and a methacryloyl group-containing compound having a molecular weight of 500 or less is greater than 80:20 by mass ratio, the viscosity of the polymerizable composition becomes too high This is not preferable.

  Further, in component 1, urethane acrylate, urethane methacrylate, polyisoprene acrylate, polyisoprene methacrylate, polybutadiene acrylate, polybutadiene methacrylate, hydrogenated polyisoprene acrylate, hydrogenated polyisoprene methacrylate, hydrogenated polybutadiene acrylate And a polymer compound selected from the group consisting of hydrogenated polybutadiene-based methacrylates, and a use ratio of a compound selected from the group consisting of an acryloyl group-containing compound having a molecular weight of 500 or less and a methacryloyl group-containing compound having a molecular weight of 500 or less, The mass ratio is preferably 45:55 to 85:15, and more preferably, the mass ratio is 50:50 to 80:20. From urethane acrylate, urethane methacrylate, polyisoprene acrylate, polyisoprene methacrylate, polybutadiene acrylate, polybutadiene methacrylate, hydrogenated polyisoprene acrylate, hydrogenated polyisoprene methacrylate, hydrogenated polybutadiene acrylate and hydrogenated polybutadiene methacrylate The use ratio of the polymer compound selected from the group consisting of the compound selected from the group consisting of the acryloyl group-containing compound having a molecular weight of 500 or less and the methacryloyl group-containing compound having a molecular weight of 500 or less in mass ratio is more than 45:55 If it is small, the volume shrinkage during polymerization may become too large, or the coating film strength of the polymer may be insufficient, which is not preferable. Also, urethane acrylate, urethane methacrylate, polyisoprene acrylate, polyisoprene methacrylate, polybutadiene acrylate, polybutadiene methacrylate, hydrogenated polyisoprene acrylate, hydrogenated polyisoprene methacrylate, hydrogenated polybutadiene acrylate and hydrogenated polybutadiene The use ratio of the polymer selected from the group consisting of methacrylate and the compound selected from the group consisting of the acryloyl group-containing compound having a molecular weight of 500 or less and the methacryloyl group-containing compound having a molecular weight of 500 or less is 80:20 by mass ratio. If it is larger than 1, the viscosity of the polymerizable composition may become too high, which is not preferable.

Next, component 2 which is a component of the polymerizable composition used in the method for producing the image display device of the present invention (I) will be described.
Component 2 is an α-hydroxyalkylphenone photopolymerization initiator.
Examples of the α-hydroxyalkylphenone photopolymerization initiator include 1-hydroxy-cyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, and 1- [4- (2-hydroxyethoxy). ) -Phenyl] -2-hydroxy-2-methyl-1-propan-1-one, 2-hydroxy-1- {4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] phenyl}- 2-methyl-propan-1-one and the like can be mentioned. These compounds may be used alone or in combination of two or more.

Moreover, the following component 3 can be used for the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I), and it is preferable to use it.
Component 3 is an acylphosphine oxide photopolymerization initiator.
Acylphosphine oxide photopolymerization initiators include 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 2,6-dimethoxybenzoyldiphenylphosphine oxide, 2,6-dichlorobenzoyldiphenylphosphine oxide, 2,4,6-trimethyl Benzoylmethoxyphenylphosphine oxide, 2,4,6-trimethylbenzoylethoxyphenylphosphine oxide, 2,3,5,6-tetramethylbenzoyldiphenylphosphine oxide, bis- (2,6-dichlorobenzoyl) phenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -2,5-dimethylphenylphosphine oxide, bis- (2,6-dichlorobenzoyl) -4-propylphenylphosphine oxide, bis- (2,6 Dichlorobenzoyl) -1-naphthylphosphine oxide, bis- (2,6-dimethoxybenzoyl) phenylphosphine oxide, bis- (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide, bis- (2 , 6-Dimethoxybenzoyl) -2,5-dimethylphenylphosphine oxide, bis- (2,4,6-trimethylbenzoyl) phenylphosphine oxide, (2,5,6-trimethylbenzoyl) -2,4,4-trimethyl A pentyl phosphine oxide etc. can be mentioned.

  The use ratio of the α-hydroxyalkylphenone photopolymerization initiator component 2 and the acylphosphine oxide photopolymerization initiator component 3 is preferably 50:50 to 95: 5, more preferably. Is 55:45 to 93: 7, more preferably 58:42 to 90:10. When the use ratio of the α-hydroxyalkylphenone photopolymerization initiator component 2 and the acylphosphine oxide photopolymerization initiator component 3 is greater than 95: 5, the addition effect of the acylphosphine oxide photopolymerization initiator May not be seen. In addition, when the use ratio of the α-hydroxyalkylphenone photopolymerization initiator component 2 and the acylphosphine oxide photopolymerization initiator component 3 is less than 50:50, in the polymer after the main polymerization, temporary polymerization is performed. Since a boundary line (a line generated by a difference in refractive index) may be generated in the vicinity of the boundary between the portion where the polymerization is performed and the portion where the temporary polymerization is not performed, it is not preferable.

  The usage-amount of the photoinitiator in the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I) is 0.1 with respect to the total amount of 100 mass parts which combined the component 1 and the component 4 mentioned later. It is preferable that it is-10.0 mass parts, More preferably, it is 0.2-7.0 mass parts, More preferably, it is 0.3-5.0 mass parts. When the amount of the photopolymerization initiator used is less than 0.1 parts by mass with respect to 100 parts by mass of the total amount of component 1 and component 4 described later, the photopolymerization initiator is insufficient and the polymerization is insufficient. It may be possible and not preferred. Moreover, when the usage-amount of a photoinitiator is more than 10.0 mass parts with respect to the total amount of 100 mass parts which combined the component 1 and the below-mentioned component 4, the molecular weight of polymer becomes too small, and a polymer is obtained. It is not preferable because the strength may be insufficient.

In the polymerizable composition used in the method for producing an image display device of the present invention (I), the following component 4 can be used and is preferably used.
Component 4 includes an acryloyl group, a methacryloyl group, a compound composed of a carbon atom and a hydrogen atom having no function of inhibiting radical polymerization, a function of inhibiting radical polymerization, and a function of initiating photopolymerization, and an acryloyl group, At least one selected from the group consisting of a methacryloyl group, a carbon atom, a hydrogen atom, and an oxygen atom having no function of radical polymerization, a function of inhibiting radical polymerization, and a function of initiating photopolymerization A kind of compound.
Component 4 is used for the purpose of keeping the volumetric shrinkage during polymerization low. In addition to suppressing the volume shrinkage during polymerization, it may be used for the purpose of increasing the adhesion of the polymer to an adherend such as glass or acrylic resin.

  As the component 4, a compound that is liquid at 25 ° C. or a compound that is solid at 25 ° C. can be used.

  Examples of the compound used as Component 4 that is liquid at 25 ° C. include poly (α-olefin) liquid, ethylene-propylene copolymer liquid, propylene-α-olefin copolymer liquid, and ethylene-α. -Olefin copolymer liquid, liquid polybutene, liquid hydrogenated polybutene, liquid polybutadiene, liquid hydrogenated polybutadiene, liquid polyisoprene, liquid hydrogenated polyisoprene, liquid polybutadiene polyol, liquid hydrogenated polybutadiene polyol, liquid polyisoprene polyol, liquid Examples thereof include hydrogenated polyisoprene polyol, hydrogenated dimer diol, polyether polyol, polyester polyol, and polycarbonate polyol.

  The poly (α-olefin) liquid is a liquid produced by polymerization of α-olefin, and the α-olefin is a hydrocarbon compound having one carbon-carbon double bond at the molecular end. 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene and the like.

  The ethylene-α-olefin copolymer liquid material is a liquid polymer produced by copolymerizing ethylene and an α-olefin. An α-olefin is a hydrocarbon compound having one carbon-carbon double bond at the molecular end, for example, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, Examples thereof include 1-tetradecene, 1-hexadecene, 1-octadecene and the like.

  The liquid propylene-α-olefin copolymer is a liquid polymer produced by copolymerizing propylene and α-olefin. An α-olefin is a hydrocarbon compound having one carbon-carbon double bond at the molecular end, for example, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene, Examples thereof include 1-tetradecene, 1-hexadecene, 1-octadecene and the like.

  Liquid polybutene is a liquid polymer containing isobutene or n-butene as a (co) polymerization component, such as homopolymerization of isobutene, homopolymerization of n-butene, and copolymerization of isobutene and n-butene. It is a compound having a carbon-carbon unsaturated bond. As a commercial product of liquid polybutene, for example, Nisseki Polybutene LV-7, LV-50, LV-100, HV-15, HV-35, HV-50, HV-100, manufactured by JX Nippon Mining & Energy Corporation, HV-300 etc. can be mentioned.

  The liquid hydrogenated polybutene is a liquid material having a side chain obtained by hydrogenating the liquid polybutene. For example, palm reel 4, palm reel 6, palm reel 18, palm reel 24 manufactured by NOF Corporation. And palm reel EX.

  Liquid polybutadiene is a butadiene polymer that is liquid at room temperature. For example, POLYVEST110, POLYVEST130 manufactured by Evonik Degussa, NISSO-PB B-1000, NISSO-PB B-2000, NISSO-PB B- manufactured by Nippon Soda Co., Ltd. 3000 etc. can be mentioned.

  The liquid hydrogenated polyptadiene is a liquid material obtained at the normal temperature obtained by reductive hydrogenation of a butadiene polymer. Examples thereof include NISSO-PB BI-2000, NISSO-PB B-3000 manufactured by Nippon Soda Co., Ltd. Can do.

  The liquid polyisoprene is a liquid isoprene polymer at room temperature, and examples thereof include Kuraray LIR-30 manufactured by Kuraray Co., Ltd.

  Liquid hydrogenated polyisoprene is a compound that is liquid at room temperature obtained by reductive hydrogenation of an isoprene polymer, and examples thereof include LIR-200 manufactured by Kuraray Co., Ltd.

  The liquid polybutadiene polyol is a polymer that is liquid at room temperature and has two or more hydroxyl groups at the molecular terminals and has a polybutadiene structural unit. For example, NISSO-PB G-1000, NISSO-PB manufactured by Nippon Soda Co., Ltd. Examples thereof include G-2000, NISSO-PB G-3000, and Poly bd manufactured by Idemitsu Kosan Co., Ltd.

  The liquid hydrogenated polybutadiene polyol is a liquid polyol having a structure obtained by reductive hydrogenation of polybutadiene polyol or polybutadiene polycarboxylic acid. And NISSO-PB GI-3000.

  The liquid polyisoprene polyol is a polymer that is liquid at room temperature and has two or more hydroxyl groups at the molecular terminals and has a polyisoprene structural unit, and examples thereof include poly ip manufactured by Idemitsu Kosan Co., Ltd. .

  The liquid hydrogenated polyisoprene polyol is a liquid polyol having a structure obtained by reductive hydrogenation of polyisoprene polyol or polyisoprene polycarboxylic acid, and examples thereof include Epolle manufactured by Idemitsu Kosan Co., Ltd.

Hydrogenated dimer diol is a dimer acid, hydrogenated dimer acid, and lower alcohol ester thereof reduced in the presence of a catalyst to convert the carboxylic acid or carboxylate part of dimer acid to alcohol, and carbon-carbon as a raw material. In the case of having a double bond, the main component is a diol obtained by hydrogenating the double bond.
For example, when a hydrogenated dimer diol is produced by reducing a hydrogenated dimer acid, the structure of the main component of the hydrogenated dimer diol is a structure represented by the following formulas (1) and (2). .

(In the formula, R ⁸ and R ⁹ are both alkyl groups, and the total number of carbon atoms contained in R ⁸ and R ⁹ , e and f is 30 (that is, the number of carbon atoms contained in R ⁸ + R ⁹ The number of carbons included + e + f = 30).)

(In the formula, R ¹⁰ and R ¹¹ are both alkyl groups, and the total number of carbon atoms contained in R ¹⁰ and R ¹¹ , g and h is 34 (that is, the number of carbon atoms contained in R ¹⁰ + R ¹¹ The number of carbons included + g + h = 34).)
Examples of the commercially available hydrogenated dimer diol include PRIPOL (registered trademark) 2033 and the like (manufactured by Croda) and Sovermol (registered trademark) 908 (manufactured by BASF).

  Examples of polyether polyols include polypropylene glycol, polytetramethylene glycol, and propylene oxide-tetrahydrofuran copolymer.

  Examples of the polyester polyol include a polycondensate of a polyol and a polycarboxylic acid, a transesterification product of an ester of a polyol and a polycarboxylic acid, a ring-opening polymer of a cyclic ester into a polyol, and the like.

  Examples of the polycarbonate polyol include a polycondensate of polyol and phosgene, or a transesterification product of a polyol with an organic carbonate such as dimethyl carbonate, diethyl carbonate, or ethylene carbonate.

  The polymer obtained by polymerizing the polymerizable composition used in the manufacturing method of the image display device of the present invention (I) is used at the site of use (that is, at site 5a or at site 5b. )), The required dielectric constant varies. For example, when it is used in the portion 5b in FIGS. 2 to 5, it is preferable that the dielectric constant of the polymer is low. Moreover, when it is used for the site | part 5a of FIG.2, FIG.3 and FIGS. 6-8, it is desirable for the dielectric constant of a polymer to be high.

In the case of increasing the dielectric constant of the polymer, as the compound that is used as component 4 and is liquid at 25 ° C. for that purpose, polyether polyol, polyester polyol, and polycarbonate polyol are preferable, and more preferable. Are polyester polyols and polycarbonate polyols.
A preferred polyether polyol is polytetramethylene glycol.

  Specific examples of the polyol used as a raw material for the polyester polyol include 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, 3-methyl-1,5- Pentanediol, 1.8-octanediol, 1,9-nonanediol, 2-methyl-1,8-octanediol, 2-butyl-2-ethyl-1,3-propanediol, 2,4-diethyl-1 , 5-pentanediol, trimethylolethane, trimethylolpropane and the like, and these can be used alone or in combination of two or more. Among these, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, and 3-methyl-1,5-pentanediol are more preferable. Examples include 1,5-pentanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, and the most preferable is 3-methyl-1,5-pentanediol.

Specific examples of the polycarboxylic acid used as a raw material for polyester polyol include succinic acid, glutaric acid, methyl succinic acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, terephthalic acid, and isophthalic acid. Phthalic acid, 1,1-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, 2-cyclohexane-1,1-dicarboxylic acid, and the like. More than one type can be used in combination. Among these, glutaric acid, methylsuccinic acid, adipic acid, pimelic acid, suberic acid, 1,1-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 2-cyclohexane-1,1-dicarboxylic acid are preferable. , Terephthalic acid, isophthalic acid, and phthalic acid, more preferably glutaric acid, methylsuccinic acid, adipic acid, pimelic acid, suberic acid, terephthalic acid, isophthalic acid, and phthalic acid. Particularly preferred are glutaric acid, methyl succinic acid, adipic acid and pimelic acid.
As the ester of polycarboxylic acid used as a raw material for the polyester polyol, the lower alkyl ester of the polycarboxylic acid is generally used.

  Moreover, you may use the ring-opening polymer of a cyclic ester as polyester polyol. In the case of using a ring-opening polymer of a cyclic ester, γ-butyrolactone, ε-caprolactone and the like can be mentioned, and a polyester polyol which is a ring-opening polymer of ε-caprolactone is preferable.

  Examples of the polyol used as a raw material for the polycarbonate polyol include 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, 1.8 -Octanediol, 1,9-nonanediol, 2-methyl-1,8-octanediol, 2-butyl-2-ethyl-1,3-propanediol, 2,4-diethyl-1,5-pentanediol, Examples thereof include trimethylolethane and trimethylolpropane. These can be used alone or in combination of two or more. Among these, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, and 3-methyl-1,5-pentanediol are more preferable. Examples include 1,5-pentanediol, neopentyl glycol, 3-methyl-1,5-pentanediol, and the most preferable is 3-methyl-1,5-pentanediol.

  When the dielectric constant of the polymer is lowered, a liquid poly (α-olefin), a liquid ethylene-propylene copolymer, a liquid ethylene-α-olefin copolymer, a liquid propylene-α-olefin copolymer Liquid polybutene, liquid hydrogenated polybutene, liquid polybutadiene, liquid hydrogenated polybutadiene, liquid polyisoprene, liquid hydrogenated polyisoprene, liquid polybutadiene polyol, liquid hydrogenated polybutadiene polyol, liquid polyisoprene polyol and liquid hydrogenated polyisoprene polyol. When it is preferably used and heat resistance is taken into consideration, liquid poly (α-olefin) liquid, ethylene-propylene copolymer liquid, ethylene-α-olefin copolymer liquid, propylene-α-olefin Copolymer liquid, liquid polybutene, liquid hydrogenated poly Ten, liquid hydrogenated polybutadiene, liquid hydrogenated polyisoprene, liquid hydrogenated polybutadiene polyol and liquid hydrogenated polyisoprene polyol are preferred.

Moreover, the compound which is a solid at 25 degreeC can also be used as the component 4.
The compound that is used as component 4 and is solid at 25 ° C. is preferably a compound having no carbon-carbon unsaturated bond in the molecule.
Such compounds include epoxy resins that are solid at 25 ° C., polyester resins that are solid at 25 ° C., polyol resins that are solid at 25 ° C., hydrogenated petroleum resins that are solid at 25 ° C., terpene hydrogenated resins, hydrogenated Examples thereof include rosin esters.
Among these, hydrogenated rosin esters are particularly preferred when used in polymerizable compositions intended for high dielectric constant polymers.
Among these, hydrogenated petroleum resins and terpene-based hydrogenated resins are particularly preferable when used in a polymerizable composition intended for a polymer having a low dielectric constant.

  A hydrogenated petroleum resin is a resin obtained by hydrogen reduction of a petroleum resin. Examples of petroleum resins that are raw materials for hydrogenated petroleum resins include aliphatic petroleum resins, aromatic petroleum resins, aliphatic-aromatic copolymer petroleum resins, alicyclic petroleum resins, dicyclopentadiene resins, and the like. Modified products such as hydrogenated products of The synthetic petroleum resin may be C5 or C9.

  A terpene-based hydrogenated resin is a resin obtained by reductive hydrogenation of a terpene-based resin. The terpene resin that is a raw material of the terpene hydrogenated resin includes β-pinene resin, α-pinene resin, β-limonene resin, α-limonene resin, pinene-limonene copolymer resin, pinene-limonene-styrene copolymer resin. Terpene-phenol resin, aromatic modified terpene resin and the like. Many of these terpene resins are resins having no polar group.

The hydrogenated rosin ester is a resin obtained by hydrogenating a rosin ester obtained by esterifying a hydrogenated rosin obtained by hydrogenating a rosin resin or esterifying a rosin. Examples of the rosin resin tackifier include modified rosins such as gum rosin, tall oil rosin, wood rosin, disproportionated rosin, polymerized rosin and maleated rosin.
In this specification, a compound in which some alcoholic hydroxyl groups of polyhydric alcohol are esterified with hydrogenated rosin, and a compound in which all alcoholic hydroxyl groups of polyhydric alcohol are esterified with hydrogenated rosin Both are defined as being included in the hydrogenated rosin ester.

In order to balance the polymerizable composition used in the method for producing an image display device of the present invention (I) with the viscosity and the adhesion of the polymer to the adherend, the compound of component 4 is 25 ° C. It is possible and preferable to use a compound which is liquid and a compound which is solid at 25 ° C.
In Component 4, a preferred combination ratio when using a compound that is liquid at 25 ° C. and a compound that is solid at 25 ° C. in terms of mass ratio is 90:10 to 10:90, more preferably 80: 20-20: 80.

  It is preferable that the usage-amount of the component 4 in the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I) is 25-75 mass% with respect to the total amount which combined the component 1 and the component 4. More preferably, it is 30-70 mass%, Most preferably, it is 35-65 mass%. When the usage-amount of the component 4 in the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I) is less than 25 mass% with respect to the total amount which put the component 1 and the component 4 together, the component 4 The effect of adding (that is, the effect of reducing the volumetric shrinkage during polymerization) may not be obtained, which is not preferable. Moreover, when the usage-amount of the component 4 in the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I) exceeds 75 mass% with respect to the total amount which combined the component 1 and the component 4, it will superpose | polymerize. The film strength of the polymer obtained by polymerizing the adhesive composition may be too low, which is not preferable.

  The polymerization composition used in the method for producing an image display device of the present invention (I) can optionally contain a polymerization inhibitor, an antioxidant, a modifier, and the like, as necessary.

The polymerization inhibitor is not particularly limited. For example, phenothiazine, hydroquinone, p-methoxyphenol, p-benzoquinone, naphthoquinone, phenanthraquinone, tolquinone, 2,5-diacetoxy-p-benzoquinone, 2 , 5-dicaproxy-p-benzoquinone, 2,5-acyloxy-p-benzoquinone, pt-butylcatechol, 2,5-di-t-butylhydroquinone, p-tert-butylcatechol, mono-t-butylhydroquinone 2,5-di-t-amylhydroquinone, di-t-butyl paracresol hydroquinone monomethyl ether, alpha naphthol, acetamidine acetate, acetamidine sulfate, phenylhydrazine hydrochloride, hydrazine hydrochloride, trimethylbenzylammonium chloride Ride, laurylpyridinium chloride, cetyltrimethylammonium chloride, phenyltrimethylammonium chloride, trimethylbenzylammonium oxalate, di (trimethylbenzylammonium) oxalate, trimethylbenzylammonium malate, trimethylbenzylammonium tartrate, trimethylbenzylammonium glycolate, phenyl -Β-naphthylamine, parabenzylaminophenol, di-β-naphthylparaphenylenediamine, dinitrobenzene, trinitrotoluene, picric acid, cyclohexanone oxime, pyrogallol, tannic acid, resorcin, triethylamine hydrochloride, dimethylaniline hydrochloride and dibutylamine hydrochloride Examples include salts.
These may be used alone or in combination of two or more.
Among these, hydroquinone, p-methoxyphenol, p-benzoquinone, naphthoquinone, phenanthraquinone, 2,5-diacetoxy-p-benzoquinone, 2,5-dicaproxy-p-benzoquinone, 2,5-acyloxy-p- Benzoquinone, pt-butylcatechol, 2,5-di-t-butylhydroquinone, p-tert-butylcatechol, mono-t-butylhydroquinone, 2,5-di-t-amylhydroquinone, di-t-butyl -Paracresol hydroquinone monomethyl ether and phenothiazine are preferably used.
Usually, a polymerization inhibitor can be adjusted so that it may become the addition amount of 0.01-5 mass% with respect to the total amount of the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I). However, the amount of the polymerization inhibitor is a value in consideration of the polymerization inhibitor previously contained in Component 1. That is, in general, a polymerization inhibitor is contained in Component 1 in advance, but the total amount of this polymerization inhibitor and a newly added polymerization inhibitor is the amount of the production of the image display device of the present invention (I). It means that the addition amount is 0.01 to 5% by mass with respect to the total amount of the polymerizable composition used in the method.

The antioxidant is not particularly limited. For example, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5 -Di-tert-butyl-4-hydroxyphenyl) propionate, thiodiethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 3,5-di-tert-butyl-4 7-C9 alkyl ester of hydroxybenzenepropanoic acid, 4,6-bis (octylthiomethyl) -o-cresol, 3,9-bis [2- [3- (3-tert-butyl-4- Hydroxy-5-methylphenyl) propionyloxy] -1,1-dimethylethyl] -2,4,8,10-tetraoxa Pyro [5,5] -undecane, 2,2'-methylenebis (6-tert-butyl-4-methylphenol), 4,4'-butylidenebis (6-tert-butyl-3-methylphenol), 4,4 '-Thiobis (2-tert-butyl-5-methylphenol), N, N', N "-tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1,1,3- Examples thereof include tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,1-bis (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, and the like. Among them, preferred is pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], oct Decyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, most preferred is pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl). ) Propionate].
Usually, antioxidant can be adjusted so that it may become the addition amount of 0.01-5 mass% with respect to the total amount of the polymerizable composition used for the manufacturing method of the image display apparatus of this invention (I). However, the amount of the polymerization inhibitor is a value in consideration of the antioxidant contained in other components such as Component 4 in advance. That is, in general, an antioxidant may be included in the component 4 or the like in advance, but the total amount of this antioxidant and the newly added antioxidant is the image of the present invention (I). It means that the added amount is 0.01 to 5% by mass with respect to the total amount of the polymerizable composition used in the method for producing the display device.

  Examples of the modifier include a leveling agent for improving leveling properties. Examples of leveling agents include polyether-modified dimethylpolysiloxane copolymers, polyester-modified dimethylpolysiloxane copolymers, polyether-modified methylalkylpolysiloxane copolymers, aralkyl-modified methylalkylpolysiloxane copolymers, and acrylic ester copolymers. Polymers can be used. These may be used alone or in combination of two or more. 0.01-5 mass% can be added with respect to the total amount of the polymerizable composition used for the manufacturing method of the image display apparatus of this invention (I). If it is less than 0.01% by mass, the effect of adding the leveling agent may not be exhibited. Moreover, when more than 5 mass%, turbidity may arise in the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I), and it cannot be said that it is preferable.

  As for the refractive index of the polymer obtained by superposing | polymerizing the polymeric composition used for the manufacturing method of the image display apparatus of this invention (I) in 25 degreeC, 1.48-1.52 are preferable. When the refractive index at 25 ° C. is less than 1.48 or larger than 1.52, the refractive difference is too large compared to the refractive index of the acrylic resin such as optical glass or polymethyl methacrylate which is the material of the protective part. The difference in refractive index at the interface between the display unit and the protection unit becomes slightly large, and the scattering and attenuation of image light from the display unit become slightly large, which is not preferable.

Finally, the present invention (II) will be described.
The present invention (II) is an image display device that can be manufactured by the method for manufacturing an image display device of the present invention (I).
The image display device of the present invention (II) generally has a refractive index (n _D ) of 1.49 to 1.52 when the main body of the display device is made of optical glass. There is also a tempered glass having a refractive index (n _D ) of about 1.55.
For example, in the case of FIG. 1, the protection unit 3 is formed of a plate-like, sheet-like, or film-like translucent member having the same size as the display unit 2. As this translucent member, for example, optical glass or plastic (acrylic resin such as polymethyl methacrylate) can be suitably used. An optical layer such as an antireflection film, a light shielding film, or a viewing angle control film may be formed on the front surface or the back surface of the protection unit 3.
When the protection part 3 is formed from an acrylic resin, its refractive index (n _D ) is generally 1.49 to 1.51.
The protection unit 3 is provided on the display unit 2 via a spacer 4 provided on the peripheral edge of the display unit 2. The spacer 4 has a thickness of about 0.05 to 1.5 mm, whereby the distance between the surfaces of the image display unit 2 and the protection unit 3 is maintained at about 1 mm.
In addition, a frame-shaped light shielding portion (not shown) is provided at the peripheral portion of the protection portion 3 in order to improve luminance and contrast.
Further, for example, in the case of FIGS. 2 and 3, polymer layers 5 a and 5 b are interposed between the display unit 2 and the protection unit 3. In the case of an image display device manufactured by the method for manufacturing an image display device according to the present invention (I), the polymer layer 5a and the polymer layer 5b are used in the method for manufacturing an image display device according to the present invention (I). Since a polymer obtained by polymerizing the polymerizable composition to be used is interposed, the transmittance in the visible light region is 90% or more. Here, the thickness of the polymer layer 5a or the polymer layer 5b is preferably 10 to 500 μm. More preferably, it is 10-350 micrometers, More preferably, it is 10-300 micrometers. In addition, since the polymer is present in the polymer layer 5a and the polymer layer 5b, the refractive index (n _D ) at 25 ° C. is 1.45 to 1.55, preferably 1.48 to 1.5. 52, which is preferable because it is almost equal to the refractive index of the display unit 2 and the protection unit 3. Thereby, the brightness | luminance and contrast of the image light from the image display part 2 can be raised, and visibility can be improved.

When an image display device is manufactured by the method for manufacturing an image display device of the present invention (I), the polymer is present in the polymer layer 5a and the polymer layer 5b. × 10 ⁷ Pa or less, preferably 1 × 10 ³ to 1 × 10 ⁶ Pa. Therefore, it is possible to prevent the display portion and the protective portion from being distorted due to the influence of stress caused by volume shrinkage during polymerization of the polymerizable composition.

  When an image display device is manufactured by the method for manufacturing an image display device of the present invention (I), since the polymer is present in the polymer layer 5a and the polymer layer 5b, the volume at the time of polymerization of the polymerizable composition. The shrinkage ratio is 4.0% or less, preferably 3.5% or less, and more preferably 2.7% or less. Thereby, the internal stress accumulated in the polymer layer when the polymerizable composition is polymerized can be reduced, and the interface between the polymer layer 5a and the touch panel 7 or the protective part 3, or the polymer layer 5b and the touch panel. 7. It is possible to prevent the interface with the display unit 2 or the protection unit 3 from being distorted. Therefore, the polymerizable composition is interposed between the touch sensor 7 and the protection unit 3, between the touch sensor 7 and the display unit 2, or between the display unit 2 and the protection unit 3, and the polymerizable composition. , The scattering of light generated at the interface between the polymer layer 5a or 5b, the display unit 2, the protection unit 3, and the touch panel 7 can be reduced, and the brightness of the display image is increased and the visibility is improved. Can be improved.

  Moreover, when using the said polymer for the polymer layer 5b, since the dielectric constant of these polymers is low, the thickness of the polymer layer 5b can be made thin.

  As the optical glass plate used in the image display device of the present invention (II), those used as a glass plate for sandwiching the liquid crystal of the liquid crystal cell or a protective plate for the liquid crystal cell can be preferably used. Moreover, as an acrylic resin board used, what is used as a protective plate of a liquid crystal cell can be used preferably. The average surface roughness of these optical glass plates and acrylic resin plates is usually 1.0 nm or less.

The image display device of the present invention (II) is resistant to impact because the polymer layers 5a and 5b made of the polymer are filled between the display unit 2 and the protection unit 3.
In addition, it can be formed thinner than the conventional example in which a gap is provided between the display unit 2 and the protection unit 3.

Further, the image display device of the present invention (II) can take various forms. For example, as shown in FIGS. 3, 5, and 8, the spacer 4 may be omitted and the image display device 1 may be manufactured. In the case of the polymer layer 5b of FIG. 3, for example, a polymerizable composition is applied on the polarizing plate 6a on the display unit 2, and the touch sensor 7 is stacked thereon, and photopolymerization is performed in the same manner as described above. Can be obtained.
In the case of the polymer layer 5b of FIG. 5, for example, a polymerizable composition is applied on the polarizing plate 6a on the display unit 2, and the touch sensor integrated protection unit 3 is stacked thereon, Similarly, it can be obtained by photopolymerization.
Furthermore, in the case of the polymer layer 5a of FIG. 8, for example, it is obtained by applying a polymerizable composition, overlaying the protective portion 3 thereon, and performing photopolymerization in the same manner as described above.

  The present invention can be applied not only to the liquid crystal display device described above but also to various panel displays such as an organic EL and a plasma display device.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further more concretely, this invention is not restrict | limited only to a following example.

<Measurement of viscosity>
The viscosity was measured by the following method.
Using 1 mL of sample, viscosity was measured under the conditions of a temperature of 25.0 ° C. and a rotation speed of 5 rpm using a cone / plate viscometer (manufactured by Brookfield, model: DV-II + Pro, spindle model number: CPE-42). The value when it became almost constant was measured.

<Measurement of hydroxyl value>
The measurement was performed according to JIS K 0070.

<Number average molecular weight>
The number average molecular weight is a value in terms of polystyrene measured by GPC under the following conditions.
Device name: HPLC unit HSS-2000 manufactured by JASCO Corporation
Column: Shodex column LF-804
Mobile phase: Tetrahydrofuran Flow rate: 1.0 mL / min
Detector: RI-2031Plus manufactured by JASCO Corporation
Temperature: 40.0 ° C
Sample volume: Sample loop 100 μL
Sample concentration: prepared at around 0.5% by mass

<UV light intensity>
This is the value of the integrated light amount measured using an ultraviolet integrated light meter “UIT-250” (manufactured by USHIO INC.).

<Illuminance>
It is the value of illuminance measured using an ultraviolet integrated light meter “UIT-250” (manufactured by USHIO INC.).

(Execution synthesis example 1)
Pripol (registered trademark) 2033 (clad hydrogenated dimer diol, hydroxyl value 202 mgKOH / g) 322.2 g, dimethyl sebacate (produced by Tokyo Chemical Industry Co., Ltd.) 87 in a 500 mL reaction vessel equipped with a stirrer and a distillation apparatus .5 g and dioctyltin oxide (trade name: DOTO, manufactured by Hokuko Chemical Co., Ltd.) 0.18 g were charged, and the transesterification reaction was carried out while reducing pressure while flowing methanol at about 170 ° C. under normal pressure. The total amount of distilled methanol was 24.4 g. A polyester polyol having a hydroxyl value of 58.1 mgKOH / g (hereinafter referred to as polyester polyol A) was obtained.

(Execution synthesis example 2)
In a 100 mL reaction vessel equipped with a stirrer, thermometer, dropping funnel and condenser, a mixture of 2,2,4-trimethylhexamethylene diisocyanate and 2,4,4-trimethylhexamethylene diisocyanate (trade name: VESTANAT (registered trademark) ) TMDI, manufactured by Evonik Degussa) 21.89 g, dioctyltin dilaurate 12 mg and p-methoxyphenol 24 mg were charged into a reaction vessel, and 4-hydroxybutyl acrylate 15.16 g was added dropwise using a dropping funnel. During the dropping, the temperature in the reaction vessel was adjusted to 70 ° C. or lower. Stirring was continued for 2 hours while maintaining the temperature in the reactor at 65 to 70 ° C. for 2 hours to obtain a reaction product (hereinafter referred to as reaction product α).
In a 300 mL reaction vessel equipped with a stirrer, a thermometer and a condenser, 178.9 g of the aforementioned polyester polyol A, Pripol (registered trademark) 2033 (clad hydrogenated dimer diol, hydroxyl value 202 mgKOH / g) 1.1 g and dioctyl 12 mg of tin dilaurate was added and stirring was started. Thereafter, 33.7 g of the reaction product α maintained at a temperature of 60 ° C. was introduced into the reaction vessel in several portions. Meanwhile, the temperature in the reactor was not allowed to rise above 70 ° C. Thereafter, the temperature in the reactor was maintained at 65 to 70 ° C., and stirring was continued. The reaction was terminated after confirming that absorption of C═O stretching vibration of the isocyanato group disappeared by IR, and urethane acrylate having a number average molecular weight of 2300 (hereinafter referred to as “urethane acrylate 1”) was obtained.

(Execution synthesis example 3)
In a 1-liter four-necked flask equipped with a stirrer and a distillation apparatus, hydrogenated polybutadiene polyol (manufactured by Nippon Soda Co., Ltd., trade name: NISSO-PB GI-3000, hydroxyl value 31.9 mgKOH / g) 540.0 g, acrylic acid 2. n-butyl 162.0 g, dioctyltin dilaurate 0.81 g and pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (manufactured by BASF, trade name: IRGANOX 1010) 51 g was added and heated to 130 ° C. in an air stream, and the resulting mixture of n-butanol and n-butyl acrylate was gradually distilled out of the reaction system over 10 hours while refluxing. did. After n-butanol and n-butyl acrylate disappeared, the pressure in the reaction system was reduced to 10 kPa using a vacuum pump, and n-butanol and n-butyl acrylate were again distilled out of the system. After holding at 50 Pa for about 1.5 hours, the reactor was cooled to obtain hydrogenated polybutadiene acrylate having a number average molecular weight of 3625 (hereinafter referred to as “hydrogenated polybutadiene acrylate 1”).

(Execution synthesis example 4)
In a 1-liter four-necked flask equipped with a stirrer and a distillation apparatus, hydrogenated polyisoprene polyol (manufactured by Idemitsu Kosan Co., Ltd., trade name: Epaul, hydroxyl value 49.9) 540.0 g, n-butyl acrylate 162.0 g , 0.81 g of dioctyltin dilaurate and 3.51 g of pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] (manufactured by BASF, trade name: IRGANOX (registered trademark) 1010) The mixture of n-butanol and n-butyl acrylate generated by heating to 130 ° C. under an air stream was gradually distilled out of the reaction system over 10 hours while refluxing. . After n-butanol and n-butyl acrylate disappeared, the pressure in the reaction system was reduced to 10 kPa using a vacuum pump, and n-butanol and n-butyl acrylate were again distilled out of the system. After holding at 50 Pa for about 1.5 hours, the reactor was cooled to obtain hydrogenated polyisoprene acrylate having a number average molecular weight of 2357 (hereinafter referred to as “hydrogenated polyisoprene acrylate 1”).

(Execution synthesis example 5)
In a 300 mL separable flask equipped with a condenser, dropping funnel, thermometer and stirrer, 180 g of polybutadiene polyol (hydroxyl value 47.1 mg KOH / g, trade name: NISSO-PB G-2000, manufactured by Nippon Soda Co., Ltd.) and dioctyltin dilaurate 20 mg was added, and the internal temperature was raised to 50 ° C. using an oil bath. Thereafter, 22.86 g of 2-isocyanatoethyl methacrylate (trade name: Karenz MOI, manufactured by Showa Denko KK) was dropped from the dropping funnel over 15 minutes. During the dropwise addition, the internal temperature was not allowed to exceed 70 ° C. After completion of the dropping, the internal temperature of 70 ± 2 ° C. was controlled and stirring was continued. Absorption of C = O stretching vibration of the isocyanate group is no longer observed in the infrared absorption spectrum, so the agitation was stopped and the reaction was terminated to obtain polybutadiene urethane methacrylate having a number average molecular weight of 2560 (hereinafter referred to as “urethane methacrylate 1”). It was.

(Example synthesis 6)
In a 5 L reaction vessel equipped with a stirrer and a distillation apparatus, Pripol (registered trademark) 2033 (clad hydrogenated dimer diol, hydroxyl value 202 mgKOH / g), 3200 g, Pripol (registered trademark) 1009 (clad hydrogenated dimer acid, Acid value 194 mg KOH / g) 1018 g, heated to 200 ° C. while passing nitrogen under normal pressure, and subjected to a condensation reaction while distilling off water produced by the reaction. When the acid value of the product became 20 or less, 0.08 g of tetraisopropyl titanate was added, and the reaction was carried out by gradually increasing the degree of vacuum with a vacuum pump to obtain a polyester polyol having a number average molecular weight of 1055 (hereinafter referred to as polyester). This is referred to as polyol B.).

(Example synthesis 7)
A 300 mL separable flask equipped with a condenser, a dropping funnel, a thermometer and a stirrer was charged with 180 g of polyester polyol B and 20 mg of dioctyltin dilaurate, and the internal temperature was raised to 50 ° C. using an oil bath. Then, 24 g of 2-isocyanatoethyl acrylate (trade name ;: Karenz AOI, manufactured by Showa Denko KK) was dropped over 15 minutes from the dropping funnel. During the dropwise addition, the internal temperature was not allowed to exceed 70 ° C. After completion of the dropping, the internal temperature of 70 ± 2 ° C. was controlled and stirring was continued. Absorption of C = O stretching vibration of isocyanate groups was not observed in the infrared absorption spectrum, so stirring was stopped and the reaction was terminated to obtain polyurethane acrylate having a number average molecular weight of 1196 (hereinafter referred to as “urethane acrylate 2”). .

(Example formulation 1)
14.5 parts by mass of lauryl acrylate (trade name: Bremer LA, manufactured by NOF Corporation), terpene-based hydrogenated resin (trade name: CLEARON (registered trademark) K100, manufactured by Yasuhara Chemical Co., Ltd.), 24.0 parts by mass, condenser, It put in the 200 mL four neck separable round bottom flask with a thermometer and a stirrer, and raised the temperature in a 200 mL four neck separable round bottom flask to 90 degreeC using the oil bath, stirring. After confirming that the terpene hydrogenated resin was completely dissolved in lauryl acrylate, the temperature was cooled to 50 ° C. or lower.
Thereafter, 20.0 parts by mass of the hydrogenated polyisoprene acrylate 1, 3.5 parts by mass of 2-hydroxypropyl methacrylate (manufactured by Nippon Shokubai Co., Ltd.), hydrogenated polybutadiene polyol (trade name: NISSO-PB GI-1000, Nippon Soda) 20 parts by mass, hydrogenated dimer diol (trade name: Pripol 2033, manufactured by Croda) 17.0 parts by mass, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) Propionate] (trade name: IRGANOX (registered trademark) 1010, manufactured by BASF) 1.0 part by mass, 1-hydroxycyclohexyl phenyl ketone (trade name: Irgacure (registered trademark) 184, manufactured by BASF) 0.8 part by mass and 2,4,6-trimethylbenzoyldiphenylphos 0.4 parts by mass of tin oxide (trade name: SpeedCure TPO, manufactured by Lambson) was put into the 200 mL four-necked round bottom flask, heated to 73 ° C. using an oil bath with stirring, and the solution was homogeneous. Stirring was continued until a yellowish homogeneous solution having a viscosity at 25 ° C. of 3500 mPa · s was obtained.

(Example Formulation Example 2 to Example Formulation Example 14 and Comparative Formulation Example 1 to Comparative Formulation Example 5)
In the same manner as in Example 1 of blending, blending was performed according to the blending composition shown in Table 1 and Table 2. The formulations prepared in Example Formulation Example 2 to Example Formulation Example 14 were designated as Polymerizable Composition A2 to Polymerizable Composition A14, respectively, and the formulations prepared in Comparative Formulation Example 1 to Comparative Formulation Example 5 were respectively polymerizable. Composition B1 to polymerizable composition B5 were designated.
The numbers in Tables 1 and 2 mean “parts by mass” unless otherwise specified.

* 1 Claprene (registered trademark) UC-203 (maleic anhydride adduct of polyisoprene polymer and esterified product of 2-hydroxyethyl methacrylate, manufactured by Kuraray Co., Ltd., number average molecular weight 25,000)
* 2 Ebecryl (registered trademark) 230 (urethane acrylate, Daicel Cytec Co., Ltd., number average molecular weight 5000)
* 3 Dicyclopentenyloxyethyl methacrylate (trade name: FA-512M, manufactured by Hitachi Chemical Co., Ltd., molecular weight 262.35)
* 4 Lauryl acrylate (Brand name: BLEMMER LA, NOF Corporation, molecular weight 240.38)
* 5 2-hydroxypropyl methacrylate (manufactured by Nippon Shokubai Co., Ltd., molecular weight 144.17)
* 6 2-hydroxybutyl methacrylate (trade name: Light Ester HOB (N), manufactured by Kyoeisha Chemical Co., Ltd., molecular weight 158.20)
* 7 4-hydroxybutyl acrylate (trade name: 4HBA, manufactured by Osaka Organic Chemical Industry Co., Ltd., molecular weight 144.17)
* 8 N-acryloylmorpholine (trade name: ACMO, manufactured by Kojin Co., Ltd., molecular weight 141.17)
※ 9 tricyclo [5,2,1,0 ^2,6] decane diacrylate (trade name: DCP-A, manufactured by Kyoeisha Chemical Co., Ltd., molecular weight 304.39)
* 10 Terpene hydrogenated resin CLEARON (registered trademark) P85 (manufactured by Yasuhara Chemical Co., Ltd.)
* 11 Terpene-based hydrogenated resin CLEARON (registered trademark) K100 (manufactured by Yasuhara Chemical Co., Ltd.)
* 12 Hydrogenated polybutadiene polyol NISSO-PB GI-1000 (Nippon Soda Co., Ltd.)
* 13 Hydrogenated polybutadiene polyol NISSO-PB GI-2000 (Nippon Soda Co., Ltd.)
* 14 Poly (α-olefin) liquid Spectrasyn40 (manufactured by ExxonMobil Corporation)
* 15 Hydrogenated dimer diol (trade name: Pripol 2033, manufactured by Croda)
* 16 Liquid polybutadiene POLYVEST 110 (Evonik Degussa)
* 17 IRGANOX (registered trademark) 1010 (Compound name: Pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], manufactured by BASF)
* 18 Photopolymerization initiator SpeedCure TPO (Compound name: 2,4,6-trimethylbenzoyldiphenylphosphine oxide, manufactured by Lambson)
* 19 Photopolymerization initiator IRGACURE 184 (Compound name: 1-hydroxycyclohexyl phenyl ketone, manufactured by BASF)

<Method for producing polymer film for refractive index measurement>
Using a PET film coated with two silicones, the polymerizable composition A1 to the polymerizable composition A14 and the polymerizable composition B1 to the polymerizable composition B5 have a film thickness of 1.2 mm between them. Using a conveyor type ultraviolet irradiation device (manufactured by GS Yuasa Lighting Co., Ltd., trade name: GSN2-40) using a metal halide lamp, the irradiation intensity is 190 mW / cm ² (through a PET film coated with silicone) 365 nm value) and an irradiation amount of 5000 mJ / cm ² (365 nm value) for polymerization by irradiation with ultraviolet rays, and the thickness of the film sandwiched between PET films coated with silicone is about 1.2 mm. A polymer film was obtained.
The polymer films obtained from the polymerizable composition A1 to the polymerizable composition A14, the polymerizable composition B1 to the polymerizable composition B5 are respectively referred to as the polymer film A1 to the polymer film A14 and the polymer film B1. The polymer film B5 is used.

<Measurement of refractive index of polymer film>
Using the polymer film A1 to the polymer film A14 and the polymer film B1 to the polymer film B5 having a film thickness of about 1.2 mm, the refractive index at 25 ° C. was measured according to JIS K 7105. . The results are shown in Table 3.

<Measurement of volumetric shrinkage during polymerization>
Polymerizable composition A1 to polymerizable composition A14, polymerizable composition B1 to polymerizable composition B5, and the same method as described in the above section <Method for producing polymer film for refractive index measurement>. The density of the polymer film A1 to the polymer film A14 and the polymer film B1 to the polymer film B5 having a film thickness of about 2 mm, in which only the film thickness is replaced with 2 mm, is determined by an automatic hydrometer (model: DMA-220H, Shinko Electronics) The volume shrinkage at the time of polymerization was determined from the following formula.
Volume shrinkage during polymerization (%) = (density of polymer film−density of polymerizable composition) / (density of polymer) × 100
The results are shown in Table 3.

<Measurement of tensile modulus>
The polymer film A1 to the polymer composition A14 and the polymer film B1 to the polymer film B5 having a film thickness of about 1.2 mm manufactured by the above method are fixed to a tensile tester (EZ Test / CE, manufactured by Shimadzu Corporation). The test was conducted at 23 ° C. with a pulling speed of 500 mm / min to obtain the tensile elastic modulus. The results are shown in Table 3.

<Production method of polymer film for confirmation of presence / absence of boundary line and evaluation of presence / absence of boundary line of polymer film>
The polymerizable composition A1 to the polymerizable composition A14 and the polymerizable composition B1 to the polymerizable composition B5 are each made of glass plates (10 mm × 10 mm) using a dispenser (model number: ML-5000XII, manufactured by Musashi Engineering Co., Ltd.). 10 mm × 0.7 mm, glass type Product name: EAGLE XG (registered trademark), manufactured by CORNING), using a semi-automatic bonding device (model number: JE1010B-D4, manufactured by Joyo Engineering Co., Ltd.) It sandwiched between the same kind and the same shape glass plate, and adjusted so that the film thickness of polymeric composition might be set to 200 micrometers (refer FIG. 11). Thereafter, a part of the polymerizable resin composition having a film thickness of 200 μm sandwiched between the glasses was used with a metal halide spot lamp (model number: RIGHTINGCURE LC5, manufactured by Hamamatsu Photonics Co., Ltd.) 15 and the semi-automatic bonding apparatus 12 A part of the polymerizable composition is polymerized by irradiating ultraviolet rays through the transparent plate and the glass plate under the conditions of an illuminance of 190 mW / cm ² (365 nm illuminance) and an irradiation amount of 500 mJ / cm ² (365 nm integrated light amount). Polymerization). Thereafter, the two glass plates sandwiched with the partially polymerized polymerizable composition are taken out from the semi-automatic laminating apparatus (model number: JE1010B-D4, manufactured by Joyo Engineering Co., Ltd.) 12, and the metal halide lamp 14 is removed. Using a mounted conveyor type ultraviolet irradiation device (product name: GSN2-40, manufactured by GS Yuasa Lighting Co., Ltd.), an irradiation intensity of 190 mW / cm ² (illuminance of 365 nm) and an irradiation amount of 3000 mJ / cm ² ( The whole surface of the glass was irradiated with ultraviolet rays under the condition of 365 nm integrated light amount) and polymerized (main polymerization) to obtain a polymer film having a thickness of about 200 μm sandwiched between glass plates.
Whether or not a line is generated in the vicinity of the interface between the part of the polymer film having a film thickness of about 200 μm sandwiched between these glass plates and the part of the polymer film that has undergone only the main polymerization without provisional polymerization. It was observed visually.
The results are shown in Table 3.
(Circle): A (boundary) line | wire does not generate | occur | produce in the vicinity of the interface of the part which carried out the superposition | polymerization of the polymer film | membrane, and the part which only superposed | polymerized without pre-polymerization.
X: A (boundary) line is generated in the vicinity of the interface between the part of the polymer film that has been pre-polymerized and the part of the polymer film that has undergone only main polymerization without pre-polymerization.

As described above, by using the manufacturing method of the present invention, the laminating machine does not have a translucent part equal to or more than the entire surface of the translucent protective part or translucent touch sensor part. Even in this case, the photopolymerizable composition containing the specific compound can be used as the photopolymerizable composition, and in the polymer after the main polymerization, the position where the prepolymerization is performed and the temporary polymerization are performed. As a result, it is possible to provide a beautiful display image without generating a boundary line (a line generated by a difference in refractive index) in the vicinity of the boundary of the part where the process is not performed.
Therefore, it is useful to use the manufacturing method of the present invention for the manufacturing method of an image display device.

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Display part 3 Protection part 4 Spacer 5a, 5b Polymer or polymer layer 6a, 6b Polarizing plate 7 Touch sensor

Claims (14)

Between the base having the image display unit of the image display device and the translucent protection unit, between the base having the image display unit of the image display device and the translucent touch sensor unit, and the translucent touch sensor A step of interposing the polymerizable composition in at least one place selected from between the part and the translucent protective part,
The polymerizable composition is partially irradiated by irradiating a part of the polymerizable composition with light through at least one translucent part selected from the translucent protective part and the translucent touch sensor part. Partially polymerized by irradiating light on the entire surface of at least one translucent part selected from the translucent protective part and the translucent touch sensor part A method for producing an image display device comprising a step of polymerizing a polymerizable composition comprising: a polymerizable composition comprising:
(Component 1) containing at least one compound selected from the group consisting of a compound having an acryloyl group and a compound having a methacryloyl group, and (Component 2) an α-hydroxyalkylphenone photopolymerization initiator and having a polymerizable composition The manufacturing method of the image display apparatus characterized by the viscosity of 25 degreeC of a thing being 500-5000 mPa * s. The polymerizable composition is partially irradiated by irradiating a part of the polymerizable composition with light through at least one translucent part selected from the translucent protective part and the translucent touch sensor part. In the polymerization step, the light irradiation amount is 10 to 1000 mJ / cm ² in terms of the integrated light amount measured using an ultraviolet integrated light meter that detects 365 nm. The manufacturing method of the image display apparatus of description. The polymerizable composition further comprises:
3. The method for producing an image display device according to claim 1, further comprising (Component 3) an acylphosphine oxide photopolymerization initiator.   The method for manufacturing an image display device according to claim 3, wherein a ratio of the component 2 and the component 3 is 50:50 to 95: 5 by mass ratio. Ingredient 1 is
At least one polymer compound selected from the group consisting of a acryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000 and a methacryloyl group-containing polymer compound having a number average molecular weight of 1,000 to 40,000; and a molecular weight of 500 or less 5. The image display device according to claim 1, comprising at least one compound selected from the group consisting of a acryloyl group-containing compound and a methacryloyl group-containing compound having a molecular weight of 500 or less. Production method. Ingredient 1 is
From urethane acrylate, urethane methacrylate, polyisoprene acrylate, polyisoprene methacrylate, polybutadiene acrylate, polybutadiene methacrylate, hydrogenated polyisoprene acrylate, hydrogenated polyisoprene methacrylate, hydrogenated polybutadiene acrylate and hydrogenated polybutadiene methacrylate And at least one polymer selected from the group consisting of, and at least one compound selected from the group consisting of an acryloyl group-containing compound having a molecular weight of 500 or less and a methacryloyl group-containing compound having a molecular weight of 500 or less. The manufacturing method of the image display apparatus of any one of Claims 1-4. At least one compound selected from the group consisting of an acryloyl group-containing compound having a molecular weight of 500 or less and a methacryloyl group-containing compound having a molecular weight of 500 or less,
An acrylate having a hydrocarbon group having 8 to 18 carbon atoms, a methacrylate having a hydrocarbon group having 8 to 18 carbon atoms, a compound selected from the group consisting of an acrylate having an ether bond and a methacrylate having an ether bond, and an acrylamide compound The method for producing an image display device according to claim 5, further comprising a compound selected from the group consisting of: a methacrylamide-based compound, an alcoholic hydroxyl group-containing acrylate, and an alcoholic hydroxyl group-containing methacrylate. The polymerizable composition further comprises:
(Component 4) An acryloyl group, a methacryloyl group, a function of inhibiting radical polymerization, a compound composed of carbon atoms and hydrogen atoms having neither a function of inhibiting radical polymerization nor a function of initiating photopolymerization, and an acryloyl group, methacryloyl At least one compound selected from the group consisting of a compound composed of a carbon atom, a hydrogen atom, and an oxygen atom, which does not have any of a group, a function of inhibiting radical polymerization, a function of inhibiting radical polymerization, and a function of initiating photopolymerization The manufacturing method of the image display apparatus of any one of Claims 1-7 characterized by the above-mentioned. Component 4 is
The method for producing an image display device according to claim 8, comprising at least one compound selected from the group consisting of a compound that is liquid at 25 ° C. and a compound that is solid at 25 ° C. Component 4 comprises a compound that is liquid at 25 ° C.
The compound that is liquid at 25 ° C.
Poly (α-olefin) liquid, ethylene-propylene copolymer liquid, ethylene-α-olefin copolymer liquid, propylene-α-olefin copolymer liquid, liquid polybutene, liquid hydrogenated polybutene, liquid polybutadiene At least one compound selected from the group consisting of liquid hydrogenated polybutadiene, liquid polyisoprene, liquid hydrogenated polyisoprene, liquid polybutadiene polyol, liquid hydrogenated polybutadiene polyol, liquid polyisoprene polyol and liquid hydrogenated polyisoprene polyol. The manufacturing method of the image display apparatus of Claim 9 characterized by the above-mentioned. Component 4 includes a compound that is liquid at 25 ° C.
The compound that is liquid at 25 ° C.
The method for manufacturing an image display device according to claim 9, comprising at least one compound selected from the group consisting of polyether polyol, polyester polyol, and polycarbonate polyol. Component 4 comprises a compound that is liquid at 25 ° C.
The compound that is liquid at 25 ° C. is liquid poly (α-olefin) liquid, ethylene-propylene copolymer liquid, ethylene-α-olefin copolymer liquid, propylene-α-olefin copolymer liquid. And at least one compound selected from the group consisting of liquid polybutene, liquid hydrogenated polybutene, liquid hydrogenated polybutadiene, liquid hydrogenated polyisoprene, liquid hydrogenated polybutadiene polyol and liquid hydrogenated polyisoprene polyol. The manufacturing method of the image display apparatus of Claim 9. Component 4 comprises a compound that is solid at 25 ° C.
The compound that is solid at 25 ° C includes at least one compound selected from the group consisting of hydrogenated petroleum resins, terpene hydrogenated resins, and hydrogenated rosin esters. Manufacturing method of image display apparatus.   The image display apparatus which can be manufactured with the manufacturing method of the image display apparatus of any one of Claims 1-13.

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