JP2009235271A - Scratch resistant resin panel and protective panel for portable information terminal display window using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scratch resistant resin panel excellent in metallization properties having a cured coating with high scratch resistance formed thereon; and a protective panel for a portable information terminal display window using the same. <P>SOLUTION: A cured coating is formed by curing a curable paint composition containing 95.0 to 99.5 wts.pt. of a compound having at least four (meth)acryloyl groups in its molecule and 0.5 to 5.0 pts.wt. of a compound represented by general formula (I). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a scratch-resistant resin plate suitable as a display window protection plate for a portable information terminal, and a display window protection plate for a portable information terminal using the same.

  Recently, mobile phones such as mobile phones and PHS (Personal Handy-phone System) have become popular with the Internet, and in addition to simple voice transmission functions, mobile information has a function to display text information and image information. Widely used as a terminal. In addition to such portable telephones, PDAs (Personal Digital Assistants) that have Internet functions and e-mail functions in addition to functions such as address books are also widely used.

  These portable information terminals display character information and image information by a method such as liquid crystal or EL (electroluminescence), but the display window is made of a transparent resin as a protective plate. In general, methacrylic resin plates are preferably used from the viewpoint of transparency (see, for example, Patent Documents 1 to 3). In order to prevent the surface from being scratched, this protective plate has been proposed to be provided with a cured film having scratch resistance (hard coat property) with a curable coating. A compound having at least two (meth) acryloyloxy groups therein, that is, a compound containing a polyfunctional (meth) acrylate has been mainly studied (see the patent document).

  On the other hand, a cured film may be provided on the back surface (liquid crystal side) of the protective plate, and various decorations may be applied to the cured film by printing or metal vapor deposition. When decorating the back surface, the decorating part is seen through from the surface of the transparent protective plate, so that the decorative property of the protective plate surface is enhanced. In particular, when metal deposition is performed on the back surface, a metallic decoration is visible from the surface of the protective plate, so that a high-class feeling is enhanced.

Thus, the cured film on the front surface is required to have scratch resistance, and the cured film on the back surface is required to have printability and metal vapor deposition.
However, a cured film composed only of a general polyfunctional (meth) acrylate has a problem of being inferior in metal vapor deposition, although it has scratch resistance.

Japanese Patent Laid-Open No. 2002-6676 JP 2004-143365 A JP 2004-299199 A

  An object of the present invention is to provide a scratch-resistant resin plate on which a cured film having excellent metal vapor deposition properties and high scratch resistance is formed, and a display window protection plate of a portable information terminal using the same. .

  As a result of diligent research, the present inventor has a specific ratio of a compound having at least four (meth) acryloyl groups in the molecule on at least one surface of the resin substrate and a specific compound containing an isocyanuric ring skeleton. In the case of forming a cured film by curing the curable coating composition to be formed, it is suitable for a display window protection plate of a portable information terminal having a cured film having excellent metal deposition properties and high scratch resistance. The present inventors have found a new fact that a scratch-resistant resin plate can be obtained and completed the present invention.

［式中、Ｘ₁，Ｘ₂およびＸ₃は、（メタ）アクリロイル基を示す。Ｙ₁，Ｙ₂およびＹ₃は、それぞれ同一または異なる基であって、基：−ＣＯＣ_ZＨ_2ZＯ−（式中、ｚは４〜６の整数を示す。）を示し、イソシアヌル環１分子に対してｌ＋ｍ＋ｎ＝０〜３分子である。Ｒ₁，Ｒ₂およびＲ₃は、炭素数１〜４のオキシアルキレン基を示す。］ That is, the scratch-resistant resin plate of the present invention comprises a resin substrate and a cured film formed on at least one surface of the resin substrate, and the cured film has at least four (meth) acryloyl groups in the molecule. It is formed by curing a curable coating composition containing 95.0 to 99.5 parts by weight of a compound having 0.5 to 5.0 parts by weight of a compound represented by the following general formula (I) It is characterized by that.

[Wherein, X ₁ , X ₂ and X ₃ represent a (meth) acryloyl group. Y ₁ , Y ₂ and Y ₃ are the same or different groups, each representing a group: —COC _Z H _2Z O— (wherein z represents an integer of 4 to 6), and one molecule of an isocyanuric ring L + m + n = 0 to 3 molecules. R ₁ , R ₂ and R ₃ represent an oxyalkylene group having 1 to 4 carbon atoms. ]

The display window protective plate of the portable information terminal of the present invention is made of the scratch-resistant resin plate.
The “portable information terminal” in the present invention means a generic name of a device that has a window (display) for displaying character information, image information, and the like that is large enough to be carried by a person. For example, the mobile phone, PHS, PDA, etc. exemplified above are mentioned.

  The scratch-resistant resin plate of the present invention has a cured film having excellent metal vapor deposition properties and high scratch resistance. By using this scratch-resistant resin plate as a display window protective plate for a portable information terminal, The display window can be effectively protected.

  The scratch-resistant resin plate of the present invention comprises a resin substrate and a cured film formed on at least one surface of the resin substrate. Examples of the resin constituting the resin substrate include acrylic resins such as methacrylic resins, polycarbonate resins, polystyrene resins, styrene-acrylonitrile copolymers, and triacetyl cellulose resins. In particular, a methacrylic resin is suitable as a resin constituting a substrate because it has excellent transparency and high rigidity.

  The resin substrate is not limited to a single layer, and may be formed by laminating resin substrates having different compositions. Thereby, the rigidity of the resin substrate can be improved. The number of stacked layers is 2 or more, preferably about 2 to 4 layers.

  The resin substrate may have a flat surface such as a normal plate (sheet) or film, or may have a curved surface such as a convex lens or a concave lens. Further, a fine structure such as fine irregularities may be provided on the surface.

  The resin substrate may be colored with a dye, a pigment, or the like as necessary, or may contain an antioxidant, an ultraviolet absorber, rubber particles, or the like. The thickness of the resin substrate is usually about 0.1 to 3.0 mm.

  The cured film is formed by curing a curable coating composition containing a compound having at least four (meth) acryloyl groups in the molecule and the compound represented by the general formula (I).

  The compound having at least four (meth) acryloyl groups in the molecule is a curable compound having a property of being cured by irradiation with an activation energy ray such as an electron beam or ultraviolet ray. For example, pentaerythritol tetra ( (Meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and the like. These may be used alone or in combination of two or more. Good.

  Further, a urethane (meth) acrylate compound obtained by a reaction between a compound having M isocyanato groups in the molecule and a compound having hydroxyl groups and N (meth) acryloyloxy groups in the molecule, or M in the molecule An ester (meth) acrylate compound obtained by reacting a compound having one halocarbonyl group with a compound having a hydroxyl group and N (meth) acryloyloxy groups in the molecule is converted into M × N ( Examples of the compound having a (meth) acryloyl group can be given. In the present specification, the (meth) acryloyl group means an acryloyl group or a methacryloyl group, and “(meth)” in the case of (meth) acrylate, (meth) acrylic acid, etc. has the same meaning. .

In the general formula (I), X ₁ , X ₂ and X ₃ represent a (meth) acryloyl group, and the (meth) acryloyl group includes an acryloyl group or a methacryloyl group as described above. It is done.

Y ₁ , Y ₂ and Y ₃ are the same or different groups, and represent a group: —COC _Z H _2Z O— (wherein z represents an integer of 4 to 6), L + m + n = 0 to 3 molecules per molecule of isocyanuric ring. Specifically, the group in the case where z is an integer of ₅ : —COC ₅ H ₁₀ O— represents a ring-opening addition structure of ε-caprolactone, and l + m + n = 0 to 3 with respect to one molecule of isocyanuric ring. It becomes a structure in which the molecule is ring-opened.

［式中、Ｘ₁〜Ｘ₃およびＲ₁〜Ｒ₃は、前記と同じである。］ In addition, when 1 + m + n = 0 molecule per molecule of isocyanuric ring, the compound represented by the general formula (I) is a compound represented by the following general formula (II).

[Wherein, X _{1 to} X ₃ and R _{1 to} R ₃ are the same as described above. ]

R ₁ , R ₂ and R ₃ represent an oxyalkylene group having 1 to 4 carbon atoms, and examples of the oxyalkylene group having 1 to 4 carbon atoms include an oxymethylene group, an oxyethylene group and an oxypropylene group. And oxybutylene group.

  Specific examples of the compound represented by the general formula (I) include ethoxylated isocyanuric acid triacrylate, ε-caprolactone-modified tris- (2-acryloxyethyl) isocyanurate, and the like. As the ethoxylated isocyanuric acid triacrylate, the trade name “NK Ester A-9300” sold by Shin-Nakamura Chemical Co., Ltd. is used as the ε-caprolactone-modified tris- (2-acryloxyethyl) isocyanurate. The product name “NK Ester A-9300-1CL” sold by Shin-Nakamura Chemical Co., Ltd. can be preferably used. These may be used as a mixture.

  The curable coating composition contains 95.0 to 99.5 parts by weight of a compound having at least four (meth) acryloyl groups in the molecule, and 0 of the compound represented by the general formula (I). 0.5 to 5.0 parts by weight. Thereby, the cured film formed by curing the curable coating composition has excellent metal vapor deposition properties and high scratch resistance. That is, in the present invention, the reactivity of the curable compound is increased by setting the number of (meth) acryloyl groups of the curable compound to at least four, thereby obtaining high scratch resistance. Furthermore, metal vapor deposition property is improved by containing the compound represented by the said general formula (I) containing an isocyanuric ring skeleton in a specific ratio.

  On the other hand, when the amount of the compound having at least 4 (meth) acryloyl groups in the molecule is less than 95.0 parts by weight and the amount of the compound represented by the general formula (I) is more than 5.0 parts by weight, Abrasion is reduced. Further, when the compound having at least four (meth) acryloyl groups in the molecule is more than 99.5 parts by weight and the compound represented by the general formula (I) is less than 0.5 parts by weight, The vapor deposition performance is reduced.

  The curable coating composition may contain conductive fine particles as necessary. Thereby, a cured film having antistatic performance and antistatic performance can be formed. Examples of the conductive fine particles include metal oxides such as antimony oxide, indium / tin composite oxide (ITO), tin / antimony composite oxide (ATO), antimony / zinc composite oxide, and phosphorus. And fine particles of tin oxide and tin oxide doped with antimony.

  The conductive fine particles preferably have a particle size of 0.001 to 0.5 μm. When the particle size is too small, industrial production is difficult, and when the particle size is too large, the transparency of the cured film is lowered, which is not preferable. Moreover, it is preferable that the usage-amount of electroconductive fine particles is 1-100 weight part with respect to 100 weight part of sclerosing | hardenable compounds (compound which has at least 4 (meth) acryloyl group in a molecule | numerator). If the amount used is too small, a sufficient antistatic effect cannot be obtained, and if it is too large, the scratch resistance of the cured film is lowered or the film formability is lowered.

  The curable coating composition may contain a solvent in order to adjust the viscosity, the thickness of the cured film, and the like. Examples of the solvent include methanol, ethanol, 1-propanol, 2-propanol (isopropyl alcohol), 1-butanol, 2-butanol (sec-butyl alcohol), 2-methyl-1-propanol (isobutyl alcohol), 2- Alcohols such as methyl-2-propanol (tert-butyl alcohol), 2-ethoxyethanol, 2-butoxyethanol, 3-methoxy-1-propanol, 1-methoxy-2-propanol, 1-ethoxy-2-propanol Alkoxy alcohols such as ketols such as diacetone alcohol, ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone, aromatic hydrocarbons such as toluene and xylene, and esters such as ethyl acetate and butyl acetate. Le, and the like can be mentioned. These solvents are used alone or in combination of two or more. The amount of the solvent used is appropriately adjusted according to the substrate material, shape, coating method, desired thickness of the cured film, etc., but usually the total amount of the curable compound and the conductive fine particles used as necessary. The amount is about 20 to 10,000 parts by weight with respect to 100 parts by weight.

  The curable coating composition may contain additives such as a stabilizer, an antioxidant, a colorant, and a leveling agent as necessary. In particular, when a leveling agent is contained, the smoothness and scratch resistance of the cured film can be improved.

  As the leveling agent, silicone oil is preferably used. Examples thereof include dimethyl silicone oil, phenylmethyl silicone oil, alkyl / aralkyl-modified silicone oil, fluorosilicone oil, polyether-modified silicone oil, fatty acid ester-modified silicone oil, Methyl hydrogen silicone oil, silanol group-containing silicone oil, alkoxy group-containing silicone oil, phenol group-containing silicone oil, methacryl-modified silicone oil, amino-modified silicone oil, carboxylic acid-modified silicone oil, carbinol-modified silicone oil, epoxy-modified silicone oil, Examples include mercapto-modified silicone oil, fluorine-modified silicone oil, and polyether-modified silicone oil.These silicone oils may be used alone or in combination of two or more.

  The amount of the leveling agent used is usually 0.01 to 20 parts by weight with respect to 100 parts by weight of the total amount of the curable compound and conductive fine particles used as necessary. If the amount used is too small, it is difficult to obtain the intended effect, and if it is too large, the strength of the cured film is lowered, which is not preferable.

  The curable coating composition described above is applied to at least one surface of the resin substrate, and then dried as necessary. Then, the formed coating film is cured, whereby at least one surface of the resin substrate is scratch-resistant cured. A film can be formed.

  The curable coating composition can be applied by a method such as a micro gravure coating method, a roll coating method, a dipping coating method, a spin coating method, a die coating method, a cast transfer method, a flow coating method, or a spray coating method.

  The coating film is suitably cured by irradiating with an activation energy ray. Examples of the activation energy rays include electron beams, ultraviolet rays, and visible rays, and are appropriately selected according to the type of curable compound. In the case where ultraviolet rays or visible rays are used as the activation energy rays, a photopolymerization initiator is usually used.

  Examples of the photopolymerization initiator include acetophenone, acetophenone benzyl ketal, anthraquinone, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, carbazole, xanthone, 4-chlorobenzophenone, 4, 4'-diaminobenzophenone, 1,1-dimethoxydeoxybenzoin, 3,3'-dimethyl-4-methoxybenzophenone, thioxanthone, 2,2-dimethoxy-2-phenylacetophenone, 1- (4-dodecylphenyl) -2- Hydroxy-2-methylpropan-1-one, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, triphenylamine, 2,4,6-trimethylbenzoyldiphenylphosphine Oxide, 1-hydro Cycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, fluorenone, fluorene, benzaldehyde, benzoin ethyl ether, benzoisopropyl ether, benzophenone, Michler's ketone, 3-methylacetophenone, 3,3 ′, 4,4′-tetra-tert-butylperoxycarbonylbenzophenone (BTTB), 2- (dimethylamino) -1- [4- (morpholinyl) phenyl] -2- (phenylmethyl) -1-butanone, 4-benzoyl -4'-methyldiphenyl sulfide, benzyl and the like.

  The photopolymerization initiator may be used in combination with a dye sensitizer. Examples of the dye sensitizer include xanthene, thioxanthene, coumarin, and ketocoumarin. Examples of the combination of the photopolymerization initiator and the dye sensitizer include a combination of BTTB and xanthene, a combination of BTTB and thioxanthene, a combination of BTTB and coumarin, and a combination of BTTB and ketocoumarin.

  Since said photoinitiator is marketed, such a commercial item can be used. Examples of commercially available photopolymerization initiators include “IRGACURE 651”, “IRGACURE 184”, “IRGACURE 500”, “IRGACURE 1000”, “IRGACURE 2959”, sold by Ciba Specialty Chemicals, Inc., respectively. “DAROCUR 1173”, “IRGACURE 907”, “IRGACURE 369”, “IRGACURE 1700”, “IRGACURE 1800”, “IRGACURE 819”, and “IRGACURE 784”, respectively, “KAYACURE” sold by Nippon Kayaku Co., Ltd. "ITX", "KAYACURE DETX-S", "KAYACURE BP-100", "KAYACURE BMS", and "KAYACURE 2-E" AQ "and the like.

  When using a photoinitiator, the usage-amount is normally 0.1 weight part or more with respect to 100 weight part of curable compounds. If the amount used is too small, the curing rate tends not to increase as compared with the case where no photopolymerization initiator is used. In addition, the upper limit of the usage-amount of a photoinitiator is about 10 weight part normally with respect to 100 weight part of curable compounds.

  Moreover, the intensity | strength and irradiation time of an activation energy ray are suitably adjusted according to the kind of curable compound, the thickness of the coating film, etc. The activation energy ray may be irradiated in an inert gas atmosphere, and as this inert gas, nitrogen gas, argon gas, or the like can be used.

  The thickness of the formed cured film is preferably 1 to 10 μm, more preferably 2 to 6 μm. If this thickness is too small, the scratch resistance may be insufficient. If it is too large, cracks are likely to occur when exposed to high temperatures and high humidity. The thickness of the cured coating can be arbitrarily adjusted by adjusting the amount per area of the curable coating composition applied to the surface of the resin substrate and the concentration of solids contained in the curable coating composition. .

  The cured film of the present invention is excellent in metal vapor deposition and has high scratch resistance. When this cured film is formed on the surface of the resin substrate, it is possible to exhibit excellent characteristics in surface hardness required for a display window protection plate of a portable information terminal such as a cellular phone. Further, when the cured film is formed on the back surface of the resin substrate and metal deposition is performed, the metallic decoration can be seen through from the surface of the resin substrate, so that a high-class feeling can be enhanced. Therefore, the scratch-resistant resin plate of the present invention can be suitably used as a display window protection plate for portable information terminals typified by mobile phones. Further, it can also be used as various members in fields requiring scratch resistance, such as a finder portion of a digital camera or a handheld video camera, a display window protection plate of a portable game machine, or the like.

  In order to produce a display window protection plate for a portable information terminal from the scratch-resistant resin plate of the present invention, first, processing such as printing and drilling is performed as necessary, and cutting processing is performed to a required size. Next, if the cut-resistant scratch-resistant resin plate is set on the display window of the portable information terminal, it is possible to obtain a display window with excellent metal vapor deposition and high scratch resistance.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited by these Examples. In the following examples, “%” and “part” representing the content or amount used are based on weight unless otherwise specified. Moreover, the measuring method and evaluation method of each physical property are as follows.

(Thickness of cured film)
The thickness of the cured film of the obtained scratch-resistant resin plate was measured using a film thickness measuring device [“F-20” manufactured by Filmmetrics Co., Ltd.].

(Metal vapor deposition)
Metal deposition is performed using a high-speed vacuum deposition apparatus (“VPC-410” manufactured by ULVAC, Inc.) on a tungsten boat on which aluminum particles (2 particles) having a particle size of about 2 mm are placed at an electric resistance of 70 mm. Then, after aluminum was dissolved, it was vacuum-deposited on the cured film of the scratch-resistant resin plate for 2 minutes.

The scratch-resistant resin plate on which the aluminum was deposited was allowed to stand in an environment of 65 ° C.-95% RH for 24 hours, and then the peeled state of the deposited aluminum film was visually observed and evaluated. The following criteria were used.
(Circle): The vapor deposition aluminum film did not peel.
X: The deposited aluminum film was peeled off.

(Abrasion resistance)
The surface of the cured film of the obtained scratch-resistant resin plate was reciprocated 20 times with steel wool # 0000 (manufactured by Nippon Steel Wool Co., Ltd.) under a load of 500 g / cm ² , and visually checked for damage. Observed and evaluated. The following criteria were used.
○: No scratch was found.
X: Scratched.

  15 parts of tin oxide doped with phosphorus (particle size 0.05-0.5 μm), 7.25 parts of dipentaerythritol hexaacrylate and 7.25 parts of pentaerythritol tetraacrylate as curable compounds, ethoxylated isocyanuric acid triacrylate ["NK ester A-9300" manufactured by Shin-Nakamura Chemical Co., Ltd.] 0.5 part, photopolymerization initiator ["IRGACURE 184" manufactured by Ciba Specialty Chemicals Co., Ltd.] 0.8 part, and A curable coating material was prepared by mixing 69 parts of 1-methoxy-2-propanol as a solvent.

  This curable coating was applied to both surfaces of a methacrylic resin plate ("SUMIPEX E" manufactured by Sumitomo Chemical Co., Ltd.) having a thickness of 2 mm and a size of 100 mm x 60 mm by a dipping coating method, followed by drying at room temperature for 5 minutes. Furthermore, it dried at 50 degreeC for 10 minute (s), and the coating film was formed on both surfaces of the methacrylic resin board.

Next, the coating film was cured by irradiating with an ultraviolet ray of 0.5 J / cm ² using a 120 W high-pressure mercury lamp to obtain a scratch-resistant resin plate having a cured coating thickness of 2.5 μm. . With respect to this scratch-resistant resin plate, metal vapor deposition and scratch resistance were evaluated according to the methods described above. The results are shown in Table 1. Each evaluation is performed on both sides of the scratch-resistant resin plate. If the evaluation on both sides is ○, the evaluation result is ○, and if the evaluation on either side is ×, the evaluation on the other side is Even if it is ○, the evaluation result is ×. In Table 1, the “ratio between the curable compound and the compound represented by the general formula (I)” is the sum of the amount of the curable compound and the amount of the compound represented by the general formula (I). It is the ratio of both when converted to be parts by weight.

  In place of 0.5 part of ethoxylated isocyanuric acid triacrylate, ε-caprolactone-modified tris- (2-acryloxyethyl) isocyanurate [“NK Ester A-9300-1CL” manufactured by Shin-Nakamura Chemical Co., Ltd.] A scratch-resistant resin plate having a cured coating thickness of 2.5 μm was obtained in the same manner as in Example 1 except that 0.5 part was used. With respect to this scratch-resistant resin plate, metal vapor deposition and scratch resistance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 1]
A cured coating film was prepared in the same manner as in Example 1 except that 7.5 parts of dipentaerythritol hexaacrylate and 7.5 parts of pentaerythritol tetraacrylate were used as the curable compound, and no ethoxylated isocyanuric acid triacrylate was used. A scratch-resistant resin plate having a thickness of 2.5 μm was obtained. With respect to this scratch-resistant resin plate, metal vapor deposition and scratch resistance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 2]
A scratch-resistant resin plate having a cured coating thickness of 2.5 μm in the same manner as in Example 1 except that the addition amount of ethoxylated isocyanuric acid triacrylate was changed to 0.045 parts instead of 0.5 parts. Got. With respect to this scratch-resistant resin plate, metal vapor deposition and scratch resistance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 3]
Except that 6.75 parts of dipentaerythritol hexaacrylate and 6.75 parts of pentaerythritol tetraacrylate were used as the curable compounds, and the addition amount of ethoxylated isocyanuric acid triacrylate was changed to 1.5 parts instead of 0.5 parts. Obtained a scratch-resistant resin plate having a cured coating thickness of 2.5 μm in the same manner as in Example 1. With respect to this scratch-resistant resin plate, metal vapor deposition and scratch resistance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

  In Examples 1 and 2 and Comparative Examples 1 to 3, a compound having 6 acryloyl groups in the molecule (dipentaerythritol hexaacrylate) and a compound having 4 acryloyl groups in the molecule (pentaerythritol tetraacrylate) Were used as curable compounds. A curable coating containing 95.0 to 99.5 parts by weight of the curable compound and 0.5 to 5.0 parts by weight of the compound represented by the general formula (I) is cured to form a cured film. As can be seen from Table 1, in Examples 1 and 2, it can be seen that the metal vapor deposition and scratch resistance are excellent.

  On the other hand, in Comparative Example 1 which does not contain the compound represented by the general formula (I), a result inferior in metal vapor deposition was shown. In Comparative Example 2 where the amount of the curable compound was more than 99.5 parts by weight and the amount of the compound represented by the general formula (I) was less than 0.5 parts by weight, the result of inferior metal deposition was shown. .

  In Comparative Example 3 where the curable compound is less than 95.0 parts by weight and the compound represented by the general formula (I) is more than 5.0 parts by weight, the metal vapor deposition property is excellent, but the scratch resistance is poor. Results are shown.

Claims (2)

It consists of a resin substrate and a cured film formed on at least one side of this resin substrate,
The cured coating comprises 95.0 to 99.5 parts by weight of a compound having at least four (meth) acryloyl groups in the molecule, and 0.5 to 5.0% by weight of a compound represented by the following general formula (I). A scratch-resistant resin plate, which is formed by curing a curable coating composition containing a part.

[Wherein, X ₁ , X ₂ and X ₃ represent a (meth) acryloyl group. Y ₁ , Y ₂ and Y ₃ are the same or different groups, each representing a group: —COC _Z H _2Z O— (wherein z represents an integer of 4 to 6), and one molecule of an isocyanuric ring L + m + n = 0 to 3 molecules. R ₁ , R ₂ and R ₃ represent an oxyalkylene group having 1 to 4 carbon atoms. ]   A display window protection plate for a portable information terminal comprising the scratch-resistant resin plate according to claim 1.