JPH10105335A - Transparent touch panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a problem accompanying the use of a glass substrate by turning the transparent substrate of at least one transparent electrode plate to the resin sheet of specified thickness and light transmittance obtained by turning a photosetting composition to a sheet shape and photosetting it. SOLUTION: The resin sheet whose thickness is more than 100μm and light transmittance in 550nm is more than 80% obtained by turning the photosetting composition to the sheet shape and photosetting it is used as the transparent substrate. Since the transparent resin sheet is the hardened object of the photosetting composition and bridged, it is generally full of rigidity compared to the thermoplastic resin of the same thickness, however, in the one thinner than 100μm, the rigidity becomes insufficient in the case of being assembled into this transparent touch panel and it is difficult to secure desired flatness. Also, when the light transmittance is less than 80%, lightness becomes insufficient in the case of being assembled into the transparent touch panel. Further, the visibility of display on a display element is deteriorated. Also, the transparent resin sheet is manufactured by irradiating the photosetting composition with light by a normal method and hardening it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent touch panel. More specifically, the present invention relates to a transparent touch panel using a transparent synthetic resin sheet as a substrate. The transparent touch panel according to the present invention is suitably used for, for example, an electronic organizer, a personal computer, a word processor, a copying machine, a telephone, and the like.

[0002]

2. Description of the Related Art As is well known, a transparent touch panel is widely used for an input device of an electronic organizer and other various devices. The transparent touch panel has a structure in which two transparent electrode plates each having a transparent conductive film on a transparent substrate are arranged with the transparent conductive films facing each other and an appropriate gap is provided therebetween. Normally, a transparent conductive film mainly composed of tin oxide is formed on a transparent glass substrate and used as one transparent electrode plate, and a transparent conductive film mainly composed of tin oxide is also formed on a transparent synthetic resin film. A transparent touch panel is used in which the resulting transparent electrode plate is the other.

[0003]

The glass substrate forming one of the transparent electrode plates of the transparent touch panel has a high rigidity, a surface property represented by optical properties represented by light transmittance and retardation value, and a surface represented by surface roughness. However, it has a problem that it has high specific gravity and is weak against impact. To eliminate these disadvantages of a glass substrate, the use of a transparent synthetic resin sheet as a transparent substrate has been studied. However, resin sheets obtained by extruding the most common thermoplastic resins generally have problems in surface properties and optical properties. Further, the film thickness is thinner than the glass substrate and the rigidity is poor, and it is difficult to secure flatness when assembled on a transparent touch panel. The desired rigidity can be ensured by laminating even thin resin sheets, but it is difficult to obtain a resin sheet having excellent optical characteristics by this method. As a method for obtaining a resin sheet having excellent optical properties and surface properties, a melt casting method is known. However, in this method, when a film is thickened to provide rigidity, defects such as foaming are likely to occur, and productivity is increased. Is greatly reduced.

[0004]

According to the present invention, according to the present invention, a photocurable composition is formed into a sheet and photocured.
And the light transmittance at 550 nm is 8
By using 0% or more of the resin sheet as the transparent substrate, it is possible to manufacture a transparent touch panel that avoids the above-mentioned problems associated with the use of a conventional glass substrate.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail. The transparent resin sheet used as a substitute for the conventional glass substrate in the present invention needs to have a thickness of 100 μm or more. Since the transparent resin sheet used in the present invention is a cured product of the photocurable composition and is crosslinked, it is generally richer in rigidity than a thermoplastic resin having the same thickness, but 100 μm.
If the thickness is smaller than m, the rigidity is insufficient when assembled into a transparent touch panel, and it is difficult to secure desired flatness. Usually 1
Those having a thickness of 50 μm or more, preferably 200 μm or more are used. The upper limit of the thickness of the transparent resin sheet is arbitrary, but is usually 2000 μm. That is, it is necessary to avoid setting the film thickness to a thickness equal to or more than the thickness required for securing desired flatness, because it increases the amount of resin, and thus increases the weight and cost of the transparent touch panel. Generally, 500 μm
It is most preferred to use one having a thickness of 1500 μm. The light transmittance of the transparent resin sheet needs to be 80% or more at 550 nm. 80% light transmittance
If it is less than 1, the brightness is insufficient when assembled on a transparent touch panel. Further, the visibility of the display on the display element is deteriorated.

Further, the retardation value (R value) of the transparent resin sheet used in the present invention is preferably 20 nm or less. When the retardation value is large, when the transparent touch panel according to the present invention is incorporated in a liquid crystal display device or the like,
This is not preferable because it causes display unevenness. The surface roughness (Ra) of the transparent resin sheet is preferably 0.05 μm or less. If the surface roughness is large, the interface with the transparent conductive film formed on the transparent resin sheet is disturbed, and the display quality is reduced. In particular, when integrated or combined with an STN display element that requires uniformity of fine surface properties, this decrease in surface properties hinders the liquid crystal layer from having a uniform thickness, and significantly lowers display quality. Let it. According to the method in which the photocurable composition is formed into a sheet and photocured, it is easy to obtain a resin sheet having the above-described retardation value and surface roughness.

The transparent resin sheet used in the present invention is produced by irradiating the photocurable composition with light by a conventional method to cure the composition. As the photocurable composition, a composition mainly composed of a polymerizable component having an ethylenically unsaturated bond and further added with a polymerization initiator and other commonly used auxiliary components is used.
In order to cause a cross-linking reaction during polymerization, the polymerizable component having an ethylenically unsaturated bond must include one having at least two ethylenically unsaturated bonds. Preferably, a photocurable composition mainly containing a compound having at least two ethylenically unsaturated bonds as a polymerizable component is used. Particularly preferred are those having a compound having at least two (meth) acrylate groups as a main component of the polymerizable component. For example, those mainly containing bis (meth) acrylate represented by the following formula (1) or (2) are preferably used.

[0008]

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In the formula, R ¹ and R ² may be different from each other and represent a hydrogen atom or a methyl group. R ³ represents a hydrocarbon group having 1 to 6 carbon atoms which may have an oxygen atom and / or a sulfur atom in a carbon chain, preferably an alkylene group having 2 to 4 carbon atoms. R ⁴ is a hydrocarbon group having 1 to 6 carbon atoms which may have an oxygen atom and / or a sulfur atom in a carbon chain;
It preferably represents an alkylene group having 1 to 3 carbon atoms. X represents a halogen atom, an alkyl group having 1 to 6 carbon atoms or 1 to 6 carbon atoms.
6 represents an alkoxy group, and a represents an integer of 0 to 4. However, when a is an integer of 2 or more, a plurality of Xs may be different from each other.

Some examples of the compound represented by the formula (1) are as follows. p-bis (β-methacryloyloxyethylthiomethyl) benzene, p-bis (β
-Acryloyloxyethylthiomethyl) benzene, m
-Bis (β-methacryloyloxyethylthiomethyl)
Benzene, m-bis (β-acryloyloxyethylthiomethyl) benzene, p-bis (β-methacryloyloxyethyloxyethylthiomethyl) benzene, p-bis (β-methacryloyloxyethylthioethylthiomethyl) benzene, p- Bis (β-methacryloyloxyethylthiomethyl) tetrabromobenzene, m-bis (β-methacryloyloxyethylthiomethyl) tetrachlorobenzene. These compounds are disclosed, for example, in
The compound can be synthesized by the method disclosed in JP-A-195357.

[0011]

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In the formula, R ⁵ and R ⁶ may be different from each other and represent a hydrogen atom or a methyl group. b represents 1 or 2, and c represents 0 or 1. Some examples of the compound represented by the formula (2) are as follows. Bis (oxymethyl) tricyclo [5.2.1.0 ^2.6 ] decane = diacrylate, bis (oxymethyl) tricyclo [5.
2.1.0 ^2.6 ] decane = dimethacrylate, bis (oxymethyl) tricyclo [5.2.1.0 ^2.6 ] decane = acrylate methacrylate, bis (oxymethyl)
Pentacyclo [6.5.1.1 ^3.6 0 ^{2.7. 09.13} ] pentadecane diacrylate, bis (oxymethyl) pentacyclo [6.5.1.1. ^3.6 0 ^2.7 . 0 ^9.13 ] pentadecane dimethacrylate, bis (oxymethyl)
Pentacyclo [6.5.1.1. ^3.6 0 ^2.7 . 0 ^9.13 ]
Pentadecane acrylate methacrylate. These compounds can be synthesized, for example, by the method disclosed in JP-A-62-225508.

The compound represented by the formula (1) and the compound represented by the formula (2) exemplified above may be used alone or as a mixture. When used as a mixture, the compounds represented by the formula (1) or the compounds represented by the formula (2) may be mixed, and if desired, the compound represented by the formula (1) and the compound represented by the formula (2) ) Can also be used as a mixture. The compound represented by the formula (1) gives a resin sheet having a relatively high refractive index of 1.54 to 1.65 at room temperature with respect to the D line of sodium (589.3 nm). The compound represented by the formula (2) gives a resin sheet exhibiting a relatively low refractive index of 1.47 to 1.51 under the same conditions. Therefore, when both are mixed and used, a resin sheet having an arbitrary refractive index between 1.47 and 1.65 can be obtained.

The compound having an ethylenically unsaturated bond represented by the above formula (1) or (2) may be used in combination with another compound having an ethylenically unsaturated bond, if desired. However, the amount of the compound represented by the formula (1) and the formula (2) is not more than 10% with respect to the compound represented by the formula (1) and the formula (2) so as not to impair the properties of the resin sheet formed from the compound represented by the formula (1) and the formula (2). It is preferred to keep it below weight%.
Such compounds include, for example, methyl (meth) acrylate, phenyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, methacryloyloxymethyltetracyclododecane, methacryloyloxymethyltetracyclododecene, ethylene glycol di ( (Meth) acrylate, diethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 2,2-bis [4- (β-methacryloyloxyethoxy) phenyl] propane, 2,2 ′
(Meth) acrylate compounds such as -bis [4- (β-methacryloyloxyethoxy) cyclohexyl] propane, 1,4-bis (methacryloyloxymethyl) cyclohexane, trimethylolpropane tri (meth) acrylate, styrene, chlorostyrene, and divinyl Examples include styrene such as benzene and α-methylstyrene, which may have a substituent on the nucleus or side chain. Of these, methacryloyloxymethylcyclododecane, 2,2
-Bis [4- (β-methacryloyloxyethoxy) phenyl] propane, 2,2-bis [4- (β-methacryloyloxyethoxy) cyclohexyl] propane,
1,4-bis (methacryloyloxymethyl) cyclohexane and mixtures thereof are particularly preferred.

The photocurable composition preferably contains a mercapto compound. Since the mercapto compound acts as a chain transfer agent, polymerization proceeds uniformly and gently, and a resin sheet having a small retardation value is generated. As the mercapto compound, a compound having two or more mercapto groups is preferably used. When using such a mercapto compound, without significantly impairing the heat resistance,
A resin sheet having a small retardation value and appropriate toughness can be obtained. Mercapto compounds are
It is used usually in an amount of 25% by weight or less, preferably 1 to 10% by weight, based on the polymerizable component having an ethylenically unsaturated bond. When the ratio of the mercapto compound is too large, the heat resistance of the obtained resin sheet is reduced. As the mercapto compound to be contained in the photocurable composition, those represented by the following formulas (3) to (5) are preferable.

[0016]

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In the formula, a plurality of R ⁷ may be different from each other and each represents a methylene group or an ethylene group. R ⁸ is 2 to 15 carbon atoms which may contain an oxygen atom and / or sulfur atom in the carbon chain, preferably a hydrocarbon residue of 2-6. d shows the integer of 2-6. That is, the compound represented by the formula (3) is a diester to hexaester of thioglycolic acid or thiopropionic acid and a polyol. Some examples are pentaerythritol tetrakis (β-thiopropionate), pentaerythritol tetrakis (thioglycolate), trimethylolpropane tris (β-thiopropionate), and trimethylolpropane tris (thioglycolate). , Diethylene glycol bis (β-thiopropionate), diethylene glycol bis (thioglycolate), triethylene glycol bis (β-thiopropionate), triethylene glycol bis (thioglycolate), dipentaerythritol hexakis (β -Thiopropionate), dipentaerythritol hexakis (thioglycolate) and the like.

[0018]

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In the formula, Y may be different from each other, and HS-
_{(CH 2) e - (CO} ) (OCH 2 -CH 2) f - (C
H ₂ ) _g −. Where e is an integer of 1 to 4, f is 1 to 4
And g represents an integer of 0 to 2, respectively. That is, the compound of the formula (4) is a ω-SH group-containing triisocyanurate. Some examples are Tris [2- (β
-Thiopropionyloxy) ethyl] isocyanurate, tris (2-thioglyconyloxyethyl) isocyanurate, tris [2- (β-thiopropionyloxyethoxy) ethyl] isocyanurate, tris (2-
Thioglyconyloxyethoxyethyl) isocyanurate, tris [3- (β-thiopropionyloxy) propyl] isocyanurate, tris (3-thioglyconyloxypropyl) isocyanurate, and the like.

[0020]

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In the formula, R ⁹ and R ¹⁰ may be different from each other and represent a hydrocarbon group having 1 to 3 carbon atoms. m and n each represent 0 or 1. p represents 1 or 2. That is, the compound of the formula (5) is an α, ω-SH group-containing compound.
Some examples are benzenedimercaptan,
Xylylene dimercaptan, 4,4'-dimercaptodiphenyl sulfide, and the like.

The photocurable composition usually contains a photopolymerization initiator which generates radicals by active energy rays such as ultraviolet rays. As a commonly used photopolymerization initiator,
For example, benzophenone, benzoin methyl ether, benzoin isopropyl ether, diethoxyacetophenone, 1-hydroxycyclohexyl phenyl ketone,
Examples thereof include 2,6-dimethylbenzoyldiphenylphosphine oxide and 2,4,6-trimethylbenzoyldiphenylphosphine oxide. Preferably, 2,
4,6-trimethylbenzoyldiphenylphosphine oxide or benzophenone is used. These photopolymerization initiators may be used alone or in combination of two or more. The photopolymerization initiator is used in an amount of usually 0.01 to 1% by weight, preferably 0.02 to 0.3% by weight, based on the compound having an ethylenically unsaturated bond.
If the amount of the polymerization initiator is too large, the polymerization proceeds rapidly,
Often, a resin sheet having a large retardation value is provided.

The photocurable composition may further contain conventional additives such as antioxidants, ultraviolet absorbers, dyes and pigments, and fillers. Preparation of the resin sheet from the photocurable composition can be performed according to a conventional method. Usually, a photocurable composition is injected into a mold having a flat cavity formed by facing two flat plates, at least one surface of which is capable of transmitting active energy rays, and is irradiated with active energy rays to polymerize. Just do it. The depth of the cavity may be equal to the thickness required for the resin sheet. The mold is preferably made of polished glass which has sufficient permeability to active energy rays, is hardly thermally deformed, and gives a resin sheet having good surface properties, but is preferably made of an acrylic plate, etc. You can also. It is also preferable that the mold is subjected to a process of applying a release agent or depositing a release layer to facilitate the removal of the formed resin sheet from the mold.

As the active energy ray to be irradiated, ultraviolet rays, particularly, ultraviolet rays of 200 to 400 nm are used. Irradiation amount, the type of polymerizable component in the photocurable composition,
What is necessary is just to adjust suitably according to the kind and quantity of a photoinitiator. Further, thermal polymerization may be used in combination to quickly complete the curing. In this case, the photocurable composition is heated to 30 to 300 ° C. simultaneously with light irradiation. In addition, benzoyl peroxide, diisopropyl peroxycarbonate, t-butyl peroxy (2-
A thermal polymerization initiator such as ethylhexanoate) may be added. The amount is preferably 1% by weight or less based on the polymerizable component. If the amount is too large, the retardation value of the resulting resin sheet becomes large. Furthermore, the resin sheet generated by the irradiation of the active energy ray can be heated to complete the polymerization reaction and reduce internal strain generated during the polymerization. The heating temperature is appropriately selected depending on the composition of the photocurable composition and the glass transition temperature of the formed resin sheet, but is usually preferably around the glass transition temperature or lower.

On the transparent resin sheet thus obtained, a transparent conductive film is formed by a conventional method to obtain a transparent electrode plate. Normally, transparent conductive materials such as indium oxide, tin oxide, indium tin oxide, gold, silver, palladium,
What is necessary is just to vapor-deposit on one surface of a resin sheet by sputtering, vacuum vapor deposition, ion plating, etc. Preferably, the transparent resin sheet is provided with a gas barrier layer that blocks oxygen and water vapor. The gas barrier layer may be provided on the surface of the resin sheet on which the transparent conductive film is formed, or may be provided on the opposite side. That is, a transparent conductive film may be formed on the gas barrier layer. By providing the gas barrier layer, when the touch panel is integrated with the liquid crystal display element or used in combination with the liquid crystal display element, generation of bubbles in the liquid crystal portion and deterioration of the liquid crystal can be prevented.

[0026] As the gas barrier layer, an ethylene - vinyl alcohol copolymer and vinylidene chloride may be formed by coating a resin sheet but, SiO _x (x
= 1.5 to 2), a deposited film of an inorganic oxide such as silicon oxide or aluminum oxide, or a mixture thereof is preferable. These deposited films can be easily formed by a conventionally used method such as a vacuum deposition method, a sputtering method, an ion plating method, and a CVD method. Note that a conventionally used coating layer such as an undercoat agent or a top coat agent may be provided between the resin sheet, the gas barrier layer, and the transparent conductive film in order to improve mutual adhesion.

In the transparent touch panel according to the present invention,
As the electrode plate facing the electrode plate using the resin sheet obtained from the photocurable composition obtained above as a substrate, a commonly used electrode plate can be used. Although its thickness depends on the input method, it is usually 100 to 700 μm, preferably 150 to 3 μm.
00 μm. If desired, those obtained above can be used. Hereinafter, the present invention will be described more specifically with reference to Examples, but the present invention is not limited to these Examples. In addition, the evaluation method of each item in an Example is as follows.

(1) Surface roughness (Ra) Surface roughness measuring device (Surfcom 575 manufactured by Tokyo Seimitsu Co., Ltd.)
Using A), the surface roughness (Ra, unit: μm) was measured using a diamond needle (1 μmR, 90 ° cone), measurement length 0.5 m.
m, cutoff value 0.16mm, measurement speed 0.06mm
/ Sec, measured under the condition of linear correction. (2) Retardation value (R value) Automatic birefringence measuring device (ADR-1 manufactured by Oak Manufacturing Co., Ltd.)
50N) and the retardation value (R value, unit: nm) was measured by perpendicular incidence. (3) Sheet thickness The thickness of the sheet was measured using a thickness gauge. unit:
μm (4) Light transmittance Using a spectrophotometer (manufactured by Hitachi, Ltd.), wavelength 550
The transmittance in nm was measured. (5) Weight The weight of the resin sheet (without formation of an undercoat layer, a conductive film, etc.) was measured using a precision precision balance.

Example 1 Two optically polished glass plates (310 × 410 × 5 m) sandwiching a silicon rubber spacer having a width of 5 mm and a thickness of 1 mm
m) were opposed to each other, and the peripheral portion was sealed with an adhesive tape to form a molding die. Bis (oxymethyl) tricyclo [5.
2.1.0 ^2.6 ] decane dimethacrylate 94 parts by weight,
6 parts by weight of pentaerythritol tetrakis (β-thiopropionate), 0.06 parts by weight of 2,4,6-trimethylbenzoyldiphenylphosphine oxide [manufactured by BASF (luciline TPO)], and 0.0 of benzophenone
4 parts by weight were mixed, stirred to make uniform, and then defoamed to prepare a photocurable composition.

The photocurable composition was poured into the above mold, and irradiated with ultraviolet rays for 30 minutes from two 80 W / cm metal halide lamps placed 400 mm apart from the respective glass surfaces of the mold to carry out the polymerization reaction. Was performed. The obtained resin sheet was 300 × 400 × 1.0 mm, the surface roughness (Ra) was 0.004 μm, and the retardation value was 8
nm, light transmittance 90%, sufficient rigidity, and good flatness. When the density of a commercially available optical glass for a touch panel is about 2.5 g / cm ³ , it is about 150 g lighter than a glass substrate for a touch panel having the same shape and thickness. Indium-tin oxide was deposited on the resin sheet by sputtering so as to have a thickness of about 1000 ° to obtain a transparent electrode plate. This transparent electrode plate was used as a lower electrode plate, and a common upper electrode plate was arranged opposite to this at an interval of 200 μm to produce a transparent touch panel. This had the same performance as a touch panel using a glass substrate.

Example 2 A molding die was formed in the same manner as in Example 1 except that a Teflon spacer having a width of 5 mm and a thickness of 0.5 mm was used.
A resin sheet was manufactured in exactly the same manner as in Example 1 except that this mold was used. The obtained resin sheet is 300 ×
400 × 0.5mm, surface roughness (Ra) 0.004μ
m, the retardation value was 5 nm, the light transmittance was 91%, and the rigidity and flatness were good. Its weight is about 76g than the glass substrate for touch panel of the same shape and thickness
Lightweight. A transparent conductive film having a thickness of 1000 mm was formed on this resin sheet in exactly the same manner as in Example 1, and a transparent touch panel similar to that of Example 1 was manufactured using this. This had the same performance as a touch panel using a glass substrate.

Example 3 A resin sheet obtained in exactly the same manner as in Example 1
Under a vacuum of 10 ^-5 Torr, SiO (manufactured by Sumitomo Citix Co., Ltd.) was deposited by a high-frequency induction heating method to form a gas barrier layer made of silicon oxide with a thickness of 350 °. On this gas barrier layer, a thickness of about 100
A 0 ° indium-tin oxide thin film was formed, and a touch pawl similar to that of Example 1 was manufactured using the thin film. This had the same performance as a touch panel using a glass substrate.

Claims (8)

[Claims] 1. A transparent touch panel in which two transparent electrode plates having a transparent conductive film on a transparent substrate are arranged with their transparent electrode films facing each other, wherein at least one of the transparent electrode plates has a transparent substrate, The photocurable composition was sheet-shaped and photocured, the thickness was 100 μm or more, and the thickness was 550 n
A transparent touch panel comprising a resin sheet having a light transmittance of 80% or more at m. 2. A resin sheet having a retardation value of 20.
2. The transparent touch panel according to claim 1, wherein the thickness is equal to or less than nm. 3. The resin sheet having a surface roughness (Ra) of 0.0
The transparent touch panel according to claim 1, wherein the thickness is 5 μm or less. 4. The photocurable composition according to claim 1, wherein the polymerizable component is mainly composed of a compound having at least two ethylenically unsaturated bonds. The transparent touch panel as described. 5. A photocurable composition comprising a compound having at least two (meth) acrylate groups as a main component of a polymerizable component and a mercapto compound. 4. The transparent touch panel according to any one of 1 to 3. 6. A photocurable composition comprising a compound selected from bis (meth) acrylate represented by the following formula (1) or (2) as a main component of a polymerizable component, and 25% based on the polymerizable component. The transparent touch panel according to claim 5, wherein the transparent touch panel contains a chain transfer agent selected from mercapto compounds represented by the following formulas (3), (4) or (5) by weight% or less. Embedded image In the formula, R ¹ and R ² may be different from each other and represent a hydrogen atom or a methyl group. R ³ and R ⁴ may be different from each other and represent a hydrocarbon group having 1 to 6 carbon atoms which may have an oxygen atom and / or a sulfur atom in a carbon chain. X represents a halogen atom, an alkyl group having 1 to 6 carbon atoms and 1 carbon atom.
And 6 represents a substituent selected from alkoxy groups;
Shows an integer of ~ 4. However, when a is an integer of 2 or more,
A plurality of Xs may be different from each other. Embedded image In the formula, R ⁵ and R ⁶ may be different from each other and represent a hydrogen atom or a methyl group. b represents 1 or 2, and c represents 0 or 1. Embedded image In the formula, a plurality of R ⁷ may be different from each other and each represents a methylene group or an ethylene group. R ⁸ has 2 to 2 carbon atoms which may contain an oxygen atom and / or a sulfur atom in the carbon chain.
Shows 15 hydrocarbon residues. d shows the integer of 2-6. Embedded image In the formula, Y may be different from each other, and HS- (CH ₂ ) <sub>e
- (CO) (OCH 2 -CH</sub> 2) f - (CH 2) g - shows a. Here, e represents an integer of 1 to 4, f represents an integer of 1 to 4, and g represents an integer of 0 to 2, respectively. Embedded image In the formula, R ⁹ and R ¹⁰ may be different from each other and represent a hydrocarbon group having 1 to 3 carbon atoms. m and n each represent 0 or 1. p represents 1 or 2. 7. The resin sheet according to claim 1, wherein the resin sheet has a gas barrier layer on at least one surface thereof.
7. The transparent touch panel according to any one of items 1 to 6. 8. The transparent touch panel according to claim 7, wherein the gas barrier layer is a deposited film made of silicon oxide, aluminum oxide, or a mixture thereof.