JP2007145965A - Resin composition for hardcoat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a resin composition for hardcoat which has a markedly improved stain resistance (fingerprint removability) while maintaining sufficient transparency, surface hardness and wear resistance. <P>SOLUTION: The composition is obtained by blending 3-60 pts.wt. of (B) colloidal silica surface-treated with a silane coupling agent having a reactive (meth)acrylate group in the molecule, 0.05-2.0 pts.wt. of (C) a surfactant having one or more perfluoroalkyl groups in the molecule, 0.05-1.2 pts.wt. of (D) a reactive silicone surfactant having one or more (meth)acrylate groups in the molecule and (E) a polymerization initiator with 100 pts.wt. of (A) a (meth)acrylate monomer and/or oligomer and/or polymer. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is used for the surface protection of a transparent plastic substrate represented by polycarbonate and acrylic, in particular, the surface protection of an optical disk recording medium for recording and reproducing optical signals at high speed and high density, or the surface of a substrate having a metallic luster, In particular, the present invention relates to a composition for a hard coat excellent in removal of attached fingerprints.

  For optical disks such as compact disks and magneto-optical disks, transparent substrates such as polycarbonate and polymethacrylate are used, and in particular, polycarbonate which is excellent in terms of workability, handleability and cost is used. However, it has advantages such as light weight and excellent impact resistance, but it has insufficient hardness and scratch resistance and is easily scratched. In particular, it can read information due to scratches and scratches on the reading surface. There was a problem of disappearing. In next-generation DVDs such as DVD, Blu-ray, and HDDVD, polycarbonate increases because the amount of recorded information per unit area increases, and fine scratches on the reading surface are more easily connected to reading defects. It is necessary to further provide a hard coat layer on the transparent plastic protective base material. As the performance required for such a hard coating film, sufficient surface hardness, abrasion resistance, scratch resistance, transparency and the like can be mentioned. In order to meet such demands, Patent Document 1 proposes an acrylate-based composition containing colloidal silica treated with a specific silane coupling agent.

  On the other hand, as a further performance required for the hard coating film of a hard coat agent, there is an increasing field in which surface contamination resistance, in particular, human-derived sebum components (such as fingerprints) can be easily removed. For example, in a personal computer, a mobile phone, a portable game machine, a digital camera liquid crystal screen, a display for in-vehicle navigation, etc., the visibility is remarkably lowered if the fingerprint remains attached. Further, in the above-described optical disc, particularly a next-generation DVD represented by Blu-ray, even a fingerprint on the reading surface is easily directly connected to a reading defect as the amount of recorded information per unit area increases. In addition, in an article having a design property such as an accessory, if the fingerprint is attached, the design property is impaired. Particularly, when the base has a metallic luster, the attachment of the fingerprint becomes remarkable and particularly conspicuous. Therefore, a hard coat layer that can easily remove the attached fingerprint is required.

Conventionally, the stain resistance (fingerprint removability) of the hard coat layer has attracted attention in Patent Document 2. Patent Document 3 contains a non-crosslinked fluorosurfactant, and Patent Document 4 has a non-crosslinked fluorocarbon. Although the combined use of a surfactant and a cross-linkable fluorosurfactant has been proposed, none of them has been sufficiently effective.
JP-A-57-13214 JP 2000-289172 A JP-A-10-110118 JP-A-11-293159

  The present invention solves the above-mentioned problems of the prior art, and provides a hard coat composition with significantly improved stain resistance (fingerprint removability) while maintaining sufficient transparency, surface hardness, and wear resistance. The purpose is to provide.

  As a result of diligent studies to achieve the above object, the present inventor has determined that the surface hardness and abrasion resistance can be obtained by combining two specific surfactants together with the curable acrylate component and the surface-treated colloidal silica. It has been found that the stain resistance (fingerprint removability) can be remarkably improved without lowering the thickness, and the present invention has been completed.

That is, the present invention
(A) (Meth) acrylate monomer and / or oligomer and / or polymer; 100 parts by weight
(B) Colloidal silica surface-treated with a silane coupling agent having a reactive (meth) acrylate group in the molecule; 3 to 60 parts by weight
(C) a surfactant having one or more perfluoroalkyl groups in the molecule; 0.05 to 2.0 parts by weight
(D) Reactive silicone surfactant having one or more (meth) acrylate groups in the molecule; 0.05 to 1.2 parts by weight
(E) A hard coat composition containing a polymerization initiator.

  Hereinafter, the present invention will be described in detail. The component (A) used in the present invention is a (meth) acrylate monomer and / or oligomer and / or polymer, which is a bifunctional (meth) acrylate or trifunctional conventionally used as an acrylic resin raw material for hard coat. It is appropriately selected from polyfunctional (meth) acrylates having higher properties than the above.

  Examples of the bifunctional (meth) acrylate include ethylene oxide-modified diacrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and 1,9-nonanediol di (meth). Acrylate, bisphenol A ethylene oxide modified diacrylate, dimethylol-tricyclodecane di (meth) acrylate, tripropylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, epoxy (meth) diacrylate, urethane (meth) Examples of polyfunctional (meth) acrylates having a difunctionality of 3 or more are pentaerythritol hexaacrylate, ditrimethylolpropane tetraacrylate, pentaerythritol ethoxytetraacrylate , Trimethylolpropane tri (meth) acrylate, trimethylolpropane triethoxy (meth) acrylate, urethane tri (meth) acrylate, urethane tetra (meth) acrylate, urethane hexa (meth) acrylate, polyester tetra (meth) acrylate, polyester hexa (Meth) acrylate etc. are mentioned.

  Although it does not contribute to the hardness in the hard coat, monofunctional (meth) acrylate can be added in a timely manner for the purpose of adjusting the curing shrinkage and viscosity, and improving the solubility of a small amount of additives. Monofunctional (meth) acrylates include methyl (meth) acrylate, ethyl (meth) acrylate, tert-butyl (meth) acrylate, isobornyl (meth) acrylate, octyl (meth) acrylate, isodecyl (meth) acrylate, methoxypolyethylene (Meth) acrylate, cyclohexyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, phenoxyethyl (meth) acrylate, etc. are mentioned.

  In the (meth) acrylate component used as described above, it is desirable that at least one compounded in the hard coat has a structure having one or more ether bonds in the molecule. By having an ether bond, the affinity with a reactive silicone surfactant and a perfluoroalkyl surfactant, which will be described later, is moderately improved, turbidity of the film can be suppressed, and good leveling properties are exhibited.

  The component (B) surface-treated silica used in the present invention is colloidal silica surface-treated with a silane coupling agent having a reactive (meth) acrylate group in the molecule. As described in Japanese Patent Laid-Open No. 2000-289172, etc., the scratch resistance of the film can be greatly improved as compared with the case where it is not added.

  (B) The compounding quantity of a component is 3-60 weight part with respect to 100 weight part of (A) component, More desirably, it is 5-40 weight part. When the amount of the component (B) is small, the scratch resistance is remarkably lowered, and when it is increased, the film becomes brittle.

  The component (C) used in the present invention is a surfactant having one or more perfluoroalkyl groups in the molecule, and the perfluoroalkyl groups contained are preferably those having 4 or more carbon atoms. Examples thereof include a fluorobutyl group, a perfluoropentyl group, a perfluoronepentyl group, a perfluorohexyl group, a perfluoroheptyl group, a perfluorooctyl group, a perfluorononyl group, and a perfluorodecyl group. The surfactant structure includes perfluoroalkyl ethylene oxide adduct, perfluoroalkyl propylene oxide adduct, perfluoroalkyl ethylene propylene oxide adduct, perfluorosulfonyl perfluoroalkyl group-modified silicone oil, perfluoroalkyl group-modified poly Ether-modified silicone oil, perfluoroalkyl carboxylate, perfluoroalkyl sulfonate, perfluoroalkyl phosphate ester, perfluoroalkyl ammonium salt, perfluoroalkyl (meth) acrylate, perfluoroalkyl group-containing (meth) acrylate-poly Examples include ether-containing (meth) acrylate copolymers. Especially perfluoroalkylethylene oxide adducts, perfluoroalkylpropylene oxide adducts, perfluoroalkylethylene propylene oxide adducts, perfluoroalkylethylene propylene oxide adducts, perfluoroalkyl group-containing (meth) acrylate-polyether-containing (meth) An acrylate copolymer is preferably used from the viewpoint of compatibility. F-443, F-444, F-445, F-446, F470, etc. manufactured by Ink Chemical Co., Ltd. are available.

  The component (D) used in the present invention is a reactive silicone surfactant having one or more (meth) acrylate groups in the molecule, specifically, having a polydialkylsiloxane main chain, Those having (meth) acrylate at both ends, having a polydialkylsiloxane main chain, having polyether groups at both ends, and (meth) acrylate groups at one or both ends of the whole polymer Having a (meth) acrylate at one or both ends of a copolymer of polydialkylsiloxane and polyether-substituted alkylsiloxane, polydialkylsiloxane and polyether-substituted alkylsiloxane, and (meta ) Copolymers with acrylate-modified siloxane. As the dialkylsiloxane, dimethylsiloxane is generally used. In addition, since the effect of reducing the friction coefficient of the film is large and the compatibility with the resin is excellent, it has a polydialkylsiloxane main chain, has polyether groups at both ends thereof, and further has one end of the whole polymer or Those having (meth) acrylate groups at both ends are desirable. As such reactive silicone surfactants, CoatOSil 3503 and CoatOSil 3509 manufactured by GE Silicone, Ebecryl 350 manufactured by Daicel-Cytec Co., Ltd., TEGO RAD2250 and TEGO RAD2300 manufactured by Degussa are available.

  Conventionally, a silicone-based surfactant may be blended in the hard coat layer, but this does not contribute to the improvement of the sebum wiping property on the surface. On the other hand, as described above, in Patent Document 3 (Japanese Patent Laid-Open No. 10-110118), blending of a non-crosslinked fluorine-based surfactant is used, and in Patent Document 4 (Japanese Patent Laid-Open No. 11-293159), a non-crosslinked fluorine-based surfactant is used. A combined use of a surfactant and a cross-linked fluorosurfactant has been proposed to increase the contact angle of sebum and facilitate separation from the surface, but this alone is insufficient to improve the wiping property. The component (C) is highly effective in repelling sebum dirt due to its excellent water and oil repellency, making it difficult to adhere dirt, but once attached dirt does not easily fall off, and a small amount of sebum ingredient remains even after wiping. As a result of remaining as droplets in the micron unit on the film, light scattering occurs and haze increases, so that a white cloudy mark is visually observed. Also, from the viewpoint of improving surface slipperiness, the effect is less than that of silicone surfactants. The component (D) has a certain level of water and oil repellency as a characteristic of silicone, but does not contribute to wiping off sebum dirt. In particular, in the case where the surface slipperiness is improved and the touch is improved, the phenomenon that the dirt spreads thinly when wiping off becomes prominent. The present inventor has now combined (C) a surfactant having a perfluoroalkyl group and (D) a reactive silicone surfactant to improve the contact angle by component (C) and decrease the dynamic friction coefficient by component (D). Due to the synergistic effect, the sebum wiping property is remarkably improved.

  In (C) component, the surface energy of a membrane | film | coat is reduced as much as possible, and what has a high contact angle with respect to sebum is selected. Especially when (D) component is not used, the contact angle (at 25 ° C) to jojoba oil, triolein, which is said that the film containing 0.5% by weight of component (C) is close to human sebum component It is desirable that the angle can be 60 ° or more.

  As the component (D), one that reduces the coefficient of friction of the surface and enhances the feel during wiping, and that can easily wipe off sebum effectively repelled by the component (C) is selected. In particular, when considering the friction coefficient, those having a hydrophilic group at the (both) ends of a linear silicone and further having a reactive (meth) acrylate group at the ends are preferably used. A silicone surfactant that does not have a reactive group can also impart surface slipperiness, but there is a problem that the amount of addition increases and the effect of the component (C) cannot be exhibited.

  From the above, the blending amounts of the components (C) and (D) are 0.05 to 2.0 parts by weight for the component (C) and 0.1 parts by weight for the component (D) with respect to 100 parts by weight of the component (A). 05 to 1.2 parts by weight are desirable.

  The weight ratio of (C) perfluoroalkyl group-containing surfactant to (D) reactive silicone surfactant is preferably in the range of (C) / (D) = 1.0 to 10.0, more preferably (C) / (D) = 1.2 to 4.0. If it is less than this, the oil repellency derived from the perfluoro group on the surface is lost, and if it is more than this, the coefficient of friction increases and the wiping performance decreases. The amount of the component (C) + (D) is preferably 0.1 to 3.2 parts by weight, more preferably 0.2 to 2.0 parts by weight, more preferably 100 parts by weight of the component (A). 0.3 to 1.2 parts by weight. Below this, the dirt wiping property does not appear, and above this, the hardness of the film decreases significantly.

  As the (E) polymerization initiator used in the present invention, a photopolymerization initiator is generally used, and any known publicly available one can be used, but particularly in order to ensure transparency in the visible region. It is desirable that the maximum wavelength peak of light absorption is 400 nm or less, or that the absorption intensity is rapidly attenuated by light irradiation. As such a polymerization initiator, acetophenone-based 1-hydroxy-cyclohexyl-phenyl ketone, 2,2-dimethoxy-1,2-diphenylethane-1-one, 2-hydroxy-2-methyl-1-phenyl-propane -1-one, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone -1-one, phosphine oxide-based 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, benzophenone and polymerization accelerators ethyl-4-dimethylaminobenzoate, 2-ethylhexyl-4-dimethylaminobenzoate Combinations such as these can also be used. These may be used singly or a plurality of them may be combined to optimize the curing conditions according to the light source during photocuring. In particular, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, which is liquid and easy to handle, is desirable because it is liquid and easy to handle, and is used by previously dissolving other polymerization initiators as described above. You can also The blending amount is an amount necessary for the initiation of photopolymerization and is not particularly limited, but generally 1 to 10 parts by weight is desirable with respect to 100 parts by weight of the total amount of components (A) to (D), and the curing rate 3 to 8 parts by weight is more desirable in view of the balance with the stability over time.

  In the case of a thermosetting system, a thermally decomposable radical generator such as benzoyl peroxide or azobisisobutyronitrile can be used, and it can be used in combination with a photopolymerization initiator to form a combined photo and thermosetting system. it can. In the case of using EB curing, the (E) polymerization initiator component is unnecessary, but a large-scale facility is required as compared with the light and / or thermosetting system.

  The hard coat film of the present invention may contain an antistatic agent, a matting agent, an ultraviolet stabilizer and a dye as desired. Any of these compounds can be used as long as it does not adversely affect the photocuring of the hard coating agent and does not adversely affect the transparency or translucency. Furthermore, in order to maintain hardness, the addition amount is desirably 0.1 to 10 parts by weight with respect to 100 parts by weight of the hard coating agent. When the amount is less than this, the antistatic effect and the ultraviolet ray absorbing effect cannot be expected, and when the amount is larger, the decrease in hardness and scratch resistance becomes remarkable. Especially for antistatic agents, matting agents, UV stabilizers and dyes that do not have a structure with a chemical bond with a binder resin such as an acrylic functional group, since the decrease in hardness becomes more remarkable, the amount added is a hard coating agent. 5 parts by weight or less is desirable with respect to 100 parts by weight.

  To produce the hardcoat agent used in the present invention, aqueous colloidal silica (colloidal silica aqueous dispersion), silyl (meth) acrylate, polyfunctional acrylic monomer or mixture thereof, photoinitiator and other as described above as desired Any of these additives is added. Colloidal silica can be used in the same manner even if it is preliminarily dispersed in an alcohol solvent or a ketone solvent. Examples of the alcohol include methanol, ethanol, isopropyl alcohol, 1-methoxy-2-propanol, and the like. Examples thereof include methyl ethyl ketone and methyl isobutyl ketone. The colloidal silica preferably has a primary particle size of 30 nm or less, particularly 25 nm or less in order to ensure film transparency.

  In the first step, silyl acrylate is hydrolyzed in the presence of aqueous colloidal silica and water miscible alcohol. Suitable alcohols include, for example, water miscible alcohols, specifically t-butanol, methanol, ethanol, propanol, butanol and the like, or ether alcohols such as ethoxyethanol, butoxyethanol, methoxypropanol and the like. The aqueous colloidal silica and silyl acrylate are heated and stirred until hydrolysis is completed. Hydrolysis of silyl acrylate can be carried out under atmospheric conditions or by heating and refluxing the hydrolysis mixture.

  In the second step, an acrylic resin is added to the above solution 1, and water and solvent used in the reaction are distilled off.

  Further, in the third blending step, a desired surfactant, photoinitiator, photosensitizer and the like are added to the acrylic resin in which the colloidal silica in the second step is dispersed.

  The order of addition of the above-described components to the hard coat agent used in the present invention is not important, but it is preferable to add a polyfunctional acrylic monomer or a mixture thereof to the above-mentioned mixture of hydrolyzed silyl acrylate and colloidal silica. Preferably, the polyfunctional acrylic monomer or mixture thereof is added to the mixture while stirring the mixture of silyl acrylate and colloidal silica in a suitable hydrolysis medium such as an aqueous solution of a water miscible alcohol as described above.

  When producing the hard coat agent used in the present invention, an azeotropic mixture of water and alcohol is distilled off from the above blend. If no alcohol is used in the initial hydrolysis mixture, a sufficient amount of alcohol can be added to facilitate removal of water by distillation. Other solvents such as toluene or other aromatic hydrocarbons can be added to facilitate water removal.

  The hard coat agent used in the present invention is preferably filtered before use. The material of the filter is preferably PTFE, polypropylene or the like that is not easily eroded by an acrylic compound, and the filter diameter during filtration is preferably about 0.2 to 10 microns because it is easily available. In particular, the filter diameter is divided into two stages, with the passage of 2 to 10 microns in the initial stage and 0.2 to 1 micron in the latter stage, so that colloidal silica aggregates and gels derived from acrylic resin and dust mixed in from the air are more efficient. It can be removed well and the final appearance of the film can be kept good.

  By applying the hard coat solution described above to the surface of the substrate by dipping, spinning, coater, flow, spraying, brushing, etc., and selecting a photopolymerization initiator as appropriate, a commercially available light irradiation device can be used. It can be cured. It is also possible to dilute with a volatile solvent in a timely manner, and alcohol-based methanol, ethanol, propanol, butanol, ethoxyethanol, butoxyethanol, methoxypropanol, ketone-based methyl ethyl ketone, methyl isobutyl ketone, ester-based solvents can be used. Ethyl acetate, butyl acetate, aromatic toluene, xylene and the like are used, and these can be used alone or in combination of two or more. When used as a protective layer of an optical disk, spin coating is preferably used as a coating method without diluting with a solvent.

  In the present invention, the hard coat agent is formed with a thickness of 1 to 200 μm, preferably 3 to 100 μm. When the film thickness decreases, the influence of polymerization inhibition by oxygen during photocuring increases, and a curing system under an inert gas such as nitrogen is required. When the film thickness becomes extremely large, deformation of the molded product or deterioration of the deep part curability occurs due to the effect of curing shrinkage.

  The hard coat agent of the present invention can be applied to a plastic substrate, particularly polycarbonate, acrylic, ABS, PET, TAC and the like. Also, it can be applied to a metal-deposited plastic by adding an adhesion improver and providing a primer layer in a timely manner.

Examples of the present invention will be described below, but the present invention is not limited to the following examples. Moreover, a part shows a weight part in an Example.
Examples 1-2 and Comparative Examples 1-5
A mixture of 120 parts of IPA, 60.6 parts of Nalcoag 1034A (35% colloidal silica aqueous dispersion) and 5.4 parts of γ-methacryloxypropyltrimethoxysilane was heated to 80 ° C. and refluxed for 3 hours. After cooling, 26.0 parts of 1,6-hexanediol diacrylate was added, and the solvent was distilled off under reduced pressure. When about half of the solvent had been distilled, 120 parts of methoxypropanol was added and then all of the solvent was distilled to give a clear solution.

  Next, 13.0 parts of PEG 400 # diacrylate, 13.0 parts of dimethylol tricyclodecane diacrylate, 52.0 of trimethylol propane triethoxy triacrylate were added to the surface-treated colloidal silica-dispersed 1,6-hexanediol diacrylate. In addition to 7.8 parts of photopolymerization initiator 2-hydroxy-2-methyl-1-phenyl-propan-1-one, the types and amounts of interfaces shown in Table 1 were added. An activator was added to obtain a hard coat agent.

  The hard coat solution thus obtained was applied to a disk-shaped transparent polycarbonate (GEQ Plastics OQ1030) having a diameter of 12 cm and a thickness of 0.6 mm by spin coating, and light was applied with a X-type Xenon flash lamp manufactured by Xenon. Cured to obtain a test piece on which a hard coat film was formed.

  Various physical properties of this test piece were examined. The results are shown in Table 1.

The surfactant used and the evaluation method are as follows.
(Surfactant)
・ Silicone surfactant 1 (reactive type); Daibe Cytec Ebecryl 350
・ Silicone surfactant 2 (reactive type); Degussa TEGO RAD 2250
・ Silicone surfactant 3 (non-reactive type); CoatOSil 3500 manufactured by GE Silicone
Perfluoroalkyl surfactant 1; FC-4432 manufactured by Sumitomo 3M
(Contact angle)
The contact angle was measured using a contact angle meter manufactured by Kyowa Interface Science Co., Ltd. The measurement solution used was jojoba oil, triolein, which is considered to be close to human sebum. The higher the contact angle, the better the release from the surface.
(Dynamic friction coefficient)
Using a Slip / Peer Tester manufactured by Instrumentors. Inc., a dynamic friction coefficient was measured when a 200 g load paper (contact surface length 4 cm × width 2 cm) was slid on the test piece. The lower the dynamic friction coefficient, the better the slipperiness.
(Taber wear)
Wear wheel CS10F, using two wheels with a load of 250 g on one wheel, the haze was evaluated by subtracting the haze at the time of 100 rotations from the initial haze. The lower the value, the better the wear resistance.
(Dirt wiping property)
A solution obtained by adding 9 g of methoxypropanol to 1 g of jojoba oil was spin-coated on a polycarbonate disc having a diameter of 12 cm under the condition of 3000 rpm / 2 seconds and dried to prepare a jojoba oil-attached disc. A 10 mm diameter silicone stopper (rubber hardness 40) is pressed against this disk with a force of 1 kg for 10 seconds to transfer the oil to the silicone stopper, and then the silicone stopper is pressed against the evaluation piece with a force of 1 kg for 10 seconds. Was adhered to the surface of the test piece. This test piece is a Kimwipe (one sheet is diffracted 3 times and stacked 8 times) strongly (6-8 kg weight with thumb), and visual appearance when rubbed once is evaluated in the following 3 levels did.

A: Residual oil is not visually recognized B: Residual oil is slightly recognized C: Residual oil is clearly recognizable Example 3
In Example 1 for a disc having a metallic luster inside, in which silver is vapor-deposited on a transparent polycarbonate (GE Plastics OQ1030) having a diameter of 12 cm and a thickness of 0.6 mm, and 0.6 mm-thick polycarbonate is laminated. The prepared hard coat solution was applied by spin coating and photocured with a D-type xenon flash lamp manufactured by Xenon to obtain a test piece on which a hard coat film was formed. When the stain wiping property of this test piece was evaluated in the same manner, the residual oil was not recognized visually and was good.
Example 4
The surface-treated colloidal silica-dispersed 1,6-hexanediol diacrylate prepared in Example 1 was added to 32.0 parts by weight of a hexafunctional urethane acrylate Ebecryl 1290 manufactured by Daicel-Cytec, Inc., and the solvent 1-methoxy-2-propanol 285 A solution containing 1 part by weight of a photopolymerization initiator, 6.6 parts by weight of 1-hydroxy-cyclohexyl phenyl ketone and 1.6 parts by weight of 2,4,6-trimethylbenzoyldiphenphosphine oxide was prepared, and the silicone surfactant Ebecryl was further prepared. A hard coat solution diluted with 0.3 parts by weight of 350 and 0.8 parts by weight of perfluorosurfactant FC-4432 was obtained. This solution was flow-coated onto a polycarbonate (Lexan LS2 manufactured by GE Plastics), dried at 50 ° C. for 3 minutes, and then cured using a light curing system (light source H lamp) manufactured by Fusion. When the stain wiping property of this test piece was evaluated in the same manner, the residual oil was not recognized visually and was good.

Claims (9)

(A) (Meth) acrylate monomer and / or oligomer and / or polymer; 100 parts by weight
(B) Colloidal silica surface-treated with a silane coupling agent having a reactive (meth) acrylate group in the molecule; 3 to 60 parts by weight
(C) a surfactant having one or more perfluoroalkyl groups in the molecule; 0.05 to 2.0 parts by weight
(D) Reactive silicone surfactant having one or more (meth) acrylate groups in the molecule; 0.05 to 1.2 parts by weight
(E) A composition for hard coat containing a polymerization initiator.   The weight ratio of (C) perfluoroalkyl group-containing surfactant to (D) reactive silicone surfactant is in the range of (C) / (D) = 1.0 to 10.0 and (A) to 100 parts by weight of component The composition for hard coat according to claim 1, wherein the total blending amount is 0.1 to 2.0 parts by weight.   The hard coat composition according to claim 1 or 2, wherein the component (A) comprises a compound having one or more ether bond units in the molecule.   The composition for hard coat according to any one of claims 1 to 3, wherein a viscosity (25 ° C) in a rotational viscometer is 60 cP or less.   The composition for hard-coats which diluted the composition for hard-coats in any one of Claims 1-4 with the volatile solvent.   A laminate having a hard coat layer having a thickness of 1 to 100 µm formed by applying the composition for hard coat according to any one of claims 1 to 5 on a transparent support substrate and then curing the composition with light and / or heat. .   A hard coat layer having a thickness of 1 to 100 µm formed by applying the hard coat composition according to any one of claims 1 to 5 on a substrate having a metallic luster and then curing with light and / or heat. Laminate having.   A transparent support substrate is present on a substrate having a metallic luster, and the hard coat composition according to any one of claims 1 to 5 is applied thereon and then cured with light and / or heat. A laminate having a hard coat layer having a thickness of 1 to 100 μm.   A hard coat layer having a thickness of 1 to 100 µm formed by applying the spin coat method without diluting the hard coat composition according to any one of claims 1 to 4 with a volatile solvent and then curing with light. An optical recording medium having: