JP2010222495A - Scratch resistance resin plate and display window protective plate of personal digital assistant using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scratch resistance resin plate excellent in impact resistance and having a charge protective performance, and to provide a display window protective plate of a personal digital assistant using the same. <P>SOLUTION: The scratch resistance resin plate is formed by forming a cured coating on one surface of a resin substrate. The cured coating is formed by curing a curable coating composition comprising: a compound (A) having at least one group represented by general formula (I) in the molecule; a compound (B) having at least two (meth)acryloyloxy groups in the molecule; and a conductive microparticle. The display window protective plate of a personal digital assistant is composed of the scratch resistance resin plate. In the general formula, R<SB>1</SB>and R<SB>2</SB>are each the same group or a different group from each other, and denote a hydrogen atom, or 1-4C linear or branched alkyl group; R<SB>3</SB>denotes a hydrogen atom or a methyl group; and n denotes an integer of 1 to 10. <P>COPYRIGHT: (C)2011,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 (for example, see 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).

  However, the conventional cured coating has a problem that the impact resistance is not sufficient. Moreover, the antistatic performance is not positively imparted to the conventional cured film. For this reason, when a cured coating is provided on the back surface (liquid crystal side) of the protective plate and various processing is performed on the cured coating by printing or metal vapor deposition, there is a problem that impurities such as cutting chips are likely to adhere during processing. It was.

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 having excellent impact resistance and antistatic performance, and a display window protection plate for a portable information terminal using the same.

［式中、Ｒ₁およびＲ₂は、それぞれ同一または異なる基であって、水素原子、炭素数１〜４の直鎖または分岐したアルキル基を示す。Ｒ₃は、水素原子またはメチル基を示す。ｎは１〜１０の整数を示す。］ The scratch-resistant resin plate of the present invention has a cured film formed on at least one surface of a resin substrate, and the cured film has at least one compound represented by the following general formula (I) in the molecule. It is formed by curing a curable coating composition containing (A), a compound (B) having at least two (meth) acryloyloxy groups in the molecule, and conductive fine particles. And

[Wherein, R ₁ and R ₂ are the same or different groups, and each represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms. R ₃ represents a hydrogen atom or a methyl group. n shows the integer of 1-10. ]

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.

  Since the scratch-resistant resin plate of the present invention is excellent in impact resistance and has antistatic performance, the display window can be effectively used by using this scratch-resistant resin plate as a display window protective plate of a portable information terminal. Can be protected.

  The scratch-resistant resin plate of the present invention is formed by forming a cured film on at least one surface of a 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 body, and may be a layered body in which resin substrates having different compositions are stacked. When the resin substrate is made of a laminate, 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 formed on at least one surface of the resin substrate includes at least one compound (A) having a group represented by the general formula (I) in the molecule and at least two (metabolites in the molecule). It is formed by curing a curable coating composition containing a compound (B) having an acryloyloxy group and conductive fine particles. As a result, the cured film has excellent impact resistance and scratch resistance, and has antistatic performance.

That is, when the curable coating composition contains at least one compound (A) having a group represented by the general formula (I) in the molecule, the formed cured film seems to have appropriate flexibility. As a result, excellent impact resistance is exhibited. In the general formula (I), R ₁ and R ₂ are the same or different groups, and each represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms. Examples of the linear or branched alkyl group having 1 to 4 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group. Is mentioned. R ₃ represents a hydrogen atom or a methyl group. Said n shows the integer of 1-10.

  The compound (A) has at least one group represented by the general formula (I) in the molecule, usually about 2 to 6. As said compound (A), a commercially available thing can be used, and as a specific example, all are brand name "ATM-35E" represented by following formula (1) by Shin-Nakamura Chemical Co., Ltd. Examples include the trade name “A-BPE-4” represented by the formula (2). “ATM-35E” has four groups represented by the general formula (I), and “A-BPE-4” has two groups represented by the general formula (I). “ATM-35E” and “A-BPE-4” can also be used as a mixture.

［式中、ｘは、４ｘ＝３５の関係式を満たす。］

[Wherein x satisfies the relational expression of 4x = 35. ]

［式中、ｙおよびｚは、ｙ＋ｚ＝４の関係式を満たす。］

[Wherein y and z satisfy the relational expression y + z = 4. ]

  Moreover, when the curable coating composition contains the compound (B) having at least two (meth) acryloyloxy groups in the molecule, the formed cured film has excellent scratch resistance. The compound (B) is a polyfunctional (meth) acrylate compound and has a property of being cured when irradiated with an activation energy ray such as an electron beam or ultraviolet rays. In this specification, the (meth) acryloyloxy group means an acryloyloxy group or a methacryloyloxy group, and “(meth)” in the case of (meth) acrylate, (meth) acrylic acid, etc. is the same. Meaning.

  The compound (B) has at least two (meth) acryloyloxy groups, usually about 2 to 10 in the molecule. Examples of the compound (B) include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane tri ( (Meth) acrylate, trimethylolethane tri (meth) acrylate, pentaglycerol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, glycerin tri (meth) acrylate, dipentaerythritol tri (meth) ) Acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) a Relate, tris [(meth) acryloyloxyethyl] isocyanurate, tripentaerythritol octa (meth) acrylate.

  A phosphazene-based (meth) acrylate compound in which at least two (meth) acryloyloxy groups are introduced into the phosphazene ring of the phosphazene compound; a polyisocyanate having at least two isocyanate groups in the molecule; and at least 2 in the molecule Urethane (meth) acrylate compound obtained by reaction with a polyol compound having one (meth) acryloyloxy group and a hydroxyl group; a compound having at least two carboxylic acid halide groups in the molecule; and at least two in the molecule Polyester (meth) acrylate compounds obtained by a reaction with a (meth) acryloyloxy group and a polyol compound having a hydroxyl group; oligomers such as dimers and trimers of the above-mentioned compounds can also be used. These compounds are used alone or in admixture of two or more.

  In particular, among the compounds (B) exemplified above, those having at least 4 (meth) acryloyloxy groups in the molecule are preferable. Thereby, since the reactivity of a compound (B) increases, the abrasion resistance of the cured film formed can be improved.

  The curable coating composition may contain the compound (A) and the compound (B) in a weight ratio of 20:80 to 80:20, preferably 30:70 to 70:30. If the ratio of the compound (A) is too small and the ratio of the compound (B) is too large, the impact resistance of the cured film may be lowered. Moreover, when the ratio of the said compound (A) is too much and the ratio of the said compound (B) is too small, there exists a possibility that the abrasion resistance of a cured film may fall.

  When the curable coating composition contains the conductive fine particles, the formed cured film has antistatic performance and antistatic performance. 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 0.8 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 1-150 weight part with respect to 100 weight part of total amounts of the said compounds (A) and (B). If the amount used is too small, a sufficient antistatic effect cannot be obtained. If the amount used is too large, the impact resistance and scratch resistance of the cured film will be lowered, and the film formability will be 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 material, shape, coating method, thickness of the target cured film, etc., but is usually the sum of compounds (A), (B) and conductive fine particles. 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 compounds (A) and (B) and the conductive fine particles. 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 0.1 weight part or more normally with respect to 100 weight part of total amounts of the said compound (A) and (B). 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 total amounts of the said compound (A) and (B).

  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. As this inert gas, for example, nitrogen gas or argon gas can be used.

  The thickness of the formed cured film is preferably 1 to 10 μm, more preferably 2 to 6 μm. If the thickness is too small, impact resistance and scratch resistance may be insufficient. If the thickness is too large, cracks are likely to occur when exposed to high temperature 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 scratch-resistant resin plate of the present invention is suitably used as a protective plate for a display because a cured film having excellent impact resistance and scratch resistance and antistatic performance is formed on at least one surface of the resin substrate. It is done. Examples of the display include a CRT display, a liquid crystal display, a plasma display, and an EL display. In particular, the scratch-resistant resin plate of the present invention can be suitably used as a display window protection plate for portable information terminals represented by mobile phones and the like. Further, it can be used as various members in fields requiring impact resistance, scratch resistance and antistatic performance, such as a finder portion of a digital camera or a handheld video camera, a display window protection plate of a portable game machine, and 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, the cut and scratch-resistant resin plate is set on the display window of the portable information terminal. Thereby, it can be set as the display window which is excellent in impact resistance and abrasion resistance, and has antistatic performance.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited by these Examples. In the following examples, the parts 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.].

(Falling ball strength)
When a test piece is placed in a metal cylindrical frame having an outer diameter of 60 mmφ, an inner diameter of 50 mmφ, and a depth of 5 mm, a metal ball having a weight of 36 g and a diameter of 20 mmφ is dropped from the height of 15 cm to the center of the test piece. Whether or not the piece was broken was evaluated by visual observation. The test piece was obtained by cutting out the obtained scratch-resistant resin plate into a shape of 60 mm × 60 mm. This test piece was placed in a cylindrical frame so that the cured film side hit the metal sphere. The following criteria were used.
○: Not destroyed.
X: It was destroyed.

(Abrasion resistance)
The surface of the cured film of the obtained scratch-resistant resin plate was subjected to 20 reciprocations with a load of 500 g / cm ² using steel wool # 0000 [manufactured by Nippon Steel Wool Co., Ltd.] to check whether there was any damage. Evaluation was made by visual observation. The following criteria were used.
○: No scratch was found.
X: Scratched.

(Antistatic performance)
Based on JIS K6911, it evaluated using Hirestar UP [made by Mitsubishi Chemical Corporation]. The following criteria were used.
○: Surface resistivity is 1 × 10 ⁹ to 1 × 10 ¹³ Ω / □
×: Surface resistivity is 1 × 10 ¹⁴ Ω / □ or more

  7.25 parts trade name “ATM-35E” manufactured by Shin-Nakamura Chemical Co., Ltd. represented by the above formula (1) as compound (A), 7.25 parts dipentaerythritol hexaacrylate as compound (B), conductive 15 parts of tin oxide doped with phosphorus as a fine particle (particle size 0.05 to 0.5 μm), 0.8 part of photopolymerization initiator [“IRGACURE 184” manufactured by Ciba Specialty Chemicals Co., Ltd.] Then, 69.7 parts of 1-methoxy-2-propanol was mixed as a solvent to prepare a curable coating material. In this curable coating, the ratio of the compound (A) to the compound (B) is 50:50 by weight, and the amount of the conductive fine particles used is the amount of the compounds (A) and (B). The total amount is 103 parts by weight with respect to 100 parts by weight.

  This curable coating was applied to both sides of a methacrylic resin plate ("SUMIPEX E" manufactured by Sumitomo Chemical Co., Ltd.) having a thickness of 1 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 is cured by irradiating ultraviolet rays of 0.5 J / cm ² using a 120 W high-pressure mercury lamp, and a scratch-resistant resin plate having a thickness of 2.5 μm on each side of the cured film is obtained. Obtained. The falling ball strength, scratch resistance and antistatic performance of this scratch-resistant resin plate 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 ×.

  Product made by Shin-Nakamura Chemical Co., Ltd. represented by the above formula (2) instead of 7.25 parts of the trade name “ATM-35E” made by Shin-Nakamura Chemical Co., Ltd. represented by the above formula (1) A curable paint was prepared in the same manner as in Example 1 except that 5 parts of the name “A-BPE-4” was used as the compound (A) and 9.5 parts of dipentaerythritol hexaacrylate was used as the compound (B). Prepared. Using this curable paint, a scratch-resistant resin plate having a 2.5 μm-thick cured film formed on both sides was obtained in the same manner as in Example 1. With respect to this scratch-resistant resin plate, the falling ball strength, scratch resistance and antistatic performance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 1]
A curable coating material was prepared in the same manner as in Example 1, except that 14.5 parts of the compound (B) was used and no compound (A) was used. Using this curable paint, a scratch-resistant resin plate having a 2.5 μm-thick cured film formed on both sides was obtained in the same manner as in Example 1. With respect to this scratch-resistant resin plate, the falling ball strength, scratch resistance and antistatic performance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 2]
A curable coating material was prepared in the same manner as in Example 1 except that 14.5 parts of the compound (A) was used in Example 1 and the compound (B) was not used. Using this curable paint, a scratch-resistant resin plate having a 2.5 μm-thick cured film formed on both sides was obtained in the same manner as in Example 1. With respect to this scratch-resistant resin plate, the falling ball strength, scratch resistance and antistatic performance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 3]
A curable coating was prepared in the same manner as in Example 1 except that the conductive fine particles were not used. Using this curable paint, a scratch-resistant resin plate having a 2.5 μm-thick cured film formed on both sides was obtained in the same manner as in Example 1. With respect to this scratch-resistant resin plate, the falling ball strength, scratch resistance and antistatic performance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

[Comparative Example 4]
A curable coating material was prepared in the same manner as in Example 1 except that 14.5 parts of the compound (A) was used and no compound (B) and the conductive fine particles were used. did. Using this curable paint, a scratch-resistant resin plate having a 2.5 μm-thick cured film formed on both sides was obtained in the same manner as in Example 1. With respect to this scratch-resistant resin plate, the falling ball strength, scratch resistance and antistatic performance were evaluated in the same manner as in Example 1. The results are shown in Table 1.

  As is clear from Table 1, Examples 1 and 2 in which a curable coating containing the compounds (A) and (B) and conductive fine particles was cured to form a cured film had a falling ball strength (impact resistance) and It can be seen that it has excellent scratch resistance and antistatic properties.

  On the other hand, the comparative example 1 which hardened the curable coating material which does not contain a compound (A) and formed the cured film showed the result inferior to falling ball strength. Moreover, the comparative example 2 which hardened the curable coating material which does not contain a compound (B), and formed the cured film showed the result inferior to abrasion resistance. Comparative Example 3 in which a curable coating containing no conductive fine particles was cured to form a cured film showed a result that the antistatic performance was not obtained. Comparative Example 4 in which a curable coating containing no compound (B) and conductive fine particles was cured to form a cured coating film showed inferior scratch resistance and a result that antistatic performance was not obtained.

Claims (2)

A cured film is formed on at least one surface of the resin substrate, and the cured film has at least one compound (A) having a group represented by the following general formula (I) in the molecule and at least 2 in the molecule. A scratch-resistant resin plate, which is formed by curing a curable coating composition containing a compound (B) having one (meth) acryloyloxy group and conductive fine particles.

[Wherein, R ₁ and R ₂ are the same or different groups, and each represents a hydrogen atom or a linear or branched alkyl group having 1 to 4 carbon atoms. R ₃ represents a hydrogen atom or a methyl group. n shows the integer of 1-10. ]   A display window protection plate for a portable information terminal comprising the scratch-resistant resin plate according to claim 1.