UV curable composition and scratch resistant film using same
专利摘要:
The present invention relates to an ultraviolet curable composition and a scratch resistant film using the same. In an ultraviolet curable composition comprising an oligomer, an ultraviolet reactive diluent, an adhesion promoter, a photopolymerization initiator, an antiblocking agent, and an additive, the oligomer is an aliphatic urethane acrylate having a content of 40 to 70% by weight based on the total composition and six functional groups. The UV reactive diluent is a content of 1 to 30% by weight based on the total composition, a mixture of two or more kinds of mono / polyfunctional acrylate monomers, and the adhesion promoter is 1 to 30% by weight based on the total composition , At least one selected from the group consisting of hydroxy ethyl acrylate and methylacrylic acid, the photopolymerization initiator is 0.1 to 10% by weight based on the total composition, 1-hydroxy-cyclohexyl-phenyl ketone and consisting of α, α-dimethoxy-α-hydroxyacetophenone The antiblocking agent is at least any one selected from the present invention, characterized in that the content of 0.005 to 0.5% by weight based on the total composition, silica or organic fine particles having a particle size of 0.1 to 10㎛ and the additive is silicone diacrylate The film produced using the UV curable composition is excellent in solvent resistance, chemical resistance and blocking resistance, and does not exhibit yellowing, as well as excellent adhesion despite the absence of a primer layer, and surface hardness. As high as 2H level, it is suitable for use in various fields where scratch resistance is required. 公开号:KR19990070964A 申请号:KR1019980006142 申请日:1998-02-26 公开日:1999-09-15 发明作者:안철흥;이종호 申请人:장용균;에스케이씨 주식회사; IPC主号:
专利说明:
UV curable composition and scratch resistant film using same The present invention relates to an ultraviolet curable composition and a scratch resistant film using the same, and more particularly, an ultraviolet curable composition and a scratch resistant film suitable for a hard coating layer formed on the surface of a polyester film to improve the surface hardness of the polyester film. It is about. Polyester materials, including polyethylene terephthalate films, have excellent features that are not found in other materials, such as light weight, but they have a number of advantages that are hard and easy to process, so they can be widely used by meeting social demands such as streamlining production and saving energy. It is becoming. However, it is recognized that such polyester products are susceptible to low surface hardness and are difficult to use in fields requiring scratch resistance. Accordingly, there is an increasing demand for a scratch resistant film having improved surface hardness by hard coating the surface of the product in order to compensate for the disadvantage of the polyester product. Conventionally, many methods for improving the surface hardness of a polyester film and providing scratch resistance have been proposed. Examples thereof include a method of applying a thermosetting silicone resin having a polysiloxane structure by applying a melamine resin, a urethane resin, an acrylic resin, an alkyd resin, or the like, and a thermosetting silicone resin, a method of applying an inorganic silicon oxide, or a polyfunctional acrylic resin. The method of hardening by irradiating an ultraviolet-ray using resin as a main binder is known. However, the thermal curing method of the above method has the following disadvantages. That is, it is hardly used at high temperatures, so it cannot be used for materials that are weak to heat, and because of the use of solvents, environmental problems such as air pollution occur, energy is consumed to cure, and a large area for installing curing devices. This takes a long time for curing, there is a problem such as productivity is lowered. On the contrary, the ultraviolet curing method can overcome the disadvantages of the above-mentioned thermosetting method, and has excellent storage stability and can be cured in a few seconds at room temperature compared to the thermosetting method, so that the productivity is high and the change of the cured film is small. In the case of the film produced through the wear resistance, water resistance, solvent resistance, heat resistance, weather resistance and the like has an advantage. However, in spite of the above advantages, the UV curing method cannot avoid the disadvantage that the adhesion between the composition for the hard coating layer and the polyester film cannot be maintained at a desirable level. Typically this problem has been solved by subjecting the film surface to a primer. However, the addition of the primer layer forming process inevitably leads to a decrease in productivity and an increase in production cost. On the other hand, the film produced by applying the UV curing method is not so high surface hardness is somewhat insufficient to be used as a surface protection film is a situation that needs to be solved. In addition, if the slip property of the film is not secured when the polyester film is produced, problems occur in various processes including the unwinding process. The technical problem to be achieved by the present invention is a UV curable composition suitable for a hard coating layer formed on the surface of the film to improve the surface hardness and slip properties of the polyester film as well as excellent adhesion to the polyester base film without a primer layer and It is to provide a scratch resistant film using the same. In order to achieve the above technical problem, in the present invention, in the UV curable composition comprising an oligomer, UV reactive diluent, adhesion promoter, photopolymerization initiator, antiblocking agent and additives, the oligomer is 40 to 70% by weight based on the total composition And an aliphatic urethane acrylate having 6 functional groups, the ultraviolet reactive diluent is 1 to 30% by weight based on the total composition, a mixture of two or more kinds of mono / polyfunctional acrylate monomers, and the adhesion promoter is 1 to 30% by weight based on the total composition, and at least one selected from the group consisting of hydroxy ethyl acrylate and Methacrylated Acidic Compound, the photopolymerization initiator content is 0.1 based on the total composition To 10% by weight, 1-hydroxy- At least one selected from the group consisting of 1-Hydroxy-cyclohexyl-phenyl Ketone and α, α-dimethoxy-α-hydroxyacetophenone (α, α-Dimethoxy-α-hydroxyacetophenone), The antiblocking agent is provided with an ultraviolet curable composition, characterized in that the content of 0.005 to 0.5% by weight based on the total composition, silica or organic fine particles having a particle diameter of 0.1 to 10㎛ and the additive is silicone diacrylate. In order to achieve the above another technical problem, the present invention provides a scratch resistant film using the composition. In the scratch resistant film of the present invention, the hard coat layer formed of the ultraviolet curable composition preferably has a thickness of 1 to 10 µm. Hereinafter, the present invention will be described in more detail. In general, the oligomer is a compound having a molecular weight of 500 to 5000 may be diluted with each monomer according to the viscosity and physical properties, it is also a component that determines the main characteristics of the final product. The oligomers contained in the ultraviolet curable composition according to the present invention are composed of acrylates or methacrylates at the ends thereof, and urethane acrylate, epoxy acrylate, polyester acrylate, acrylic acrylate, and silicone acrylate depending on the structure of the main chain. Or amino acrylates and the like. Specifically, the characteristics of each oligomer are as follows. Urethane acrylates include urethane bonds as repeating units and typically have flexible physical properties. There are many different types, and depending on the type of isocyanate, it is divided into aliphatic urethane acrylate and aromatic urethane acrylate. Aliphatic urethane acrylates are of the yellowing type and have 2 to 6 functional groups. Aromatic urethane acrylates are yellowing type and have fast reactivity. Epoxy acrylate contains an epoxy bond in the main chain and causes yellowing, but has excellent hardness, solvent resistance and curability. Polyester acrylate is low in viscosity and excellent in weather resistance. Acrylic acrylate has good weather resistance and water resistance, in particular good adhesion to all materials. Amino acrylate is used as a curing accelerator to improve the surface hardening and has the disadvantage of causing yellowing. Silicone acrylates are used as wetting agents, slip agents or release agents. According to a preferred embodiment of the present invention, a six-functional aliphatic urethane acrylate is selected in order to maximize the surface hardness by improving the crosslinking density within the range of no yellowing of the above-mentioned oligomers and does not adversely affect the flexibility . The content is preferably 40 to 70% by weight based on the total composition. If the content is less than 40% by weight it is not preferable because the surface hardness is not sufficient and exceeds 70% by weight because viscosity problems and coating adhesion decreases occur. In the present invention, the ultraviolet reactive diluent is a monomer having a molecular weight of 500 or less, and is mainly used for the purpose of lowering the viscosity of the ultraviolet curable composition. These monomers exhibit the following characteristics depending on the number of functional groups. First, while monofunctional (monofunctional) monomers have excellent adhesion and flexibility to the substrate, they have disadvantages of low reactivity and stickiness when used in excess. In addition, bifunctional monomers are most commonly used because of their proper viscosity, reactivity and flexibility, and trifunctional monomers have advantages of high hardness and reactivity. In addition, the 4 to 6 functional monomers have excellent reactivity and high crosslinking density, and thus have excellent hardness, but have disadvantages of low flexibility. According to the present invention, it is preferable to mix and use two or more acrylate monomers among the various monomers in order to improve the crosslinking density and the curing rate within a range that does not impair flexibility. For example, trifunctional pentaerythritol triacrylate and tetrafunctional pentaerythritol tetraacrylate are mixed, or trifunctional trimethylol propane triacrylate is added to the mixture and used. By using such a mixture of mono / polyfunctional monomers, the crosslinking density and curing rate can be preferably maintained in hard coating. At this time, the mono / polyfunctional acrylate monomer is preferably in the content of 1 to 30% by weight based on the total composition. If the content is less than 1% by weight, there is almost no dilution effect, resulting in a problem of high viscosity. When the content is more than 30% by weight, flexibility decreases, shrinkage of the cured layer occurs, and adhesion to the substrate decreases. In addition, according to the present invention, a so-called adhesion enhancer is used to enhance the adhesion of the composition for a hard coat layer to the base film. Due to the addition of the adhesion promoter, the composition according to the present invention exhibits excellent adhesion to the base film without forming a primer layer. As the adhesion promoter, one or both of hydroxy ethyl acrylate having excellent curability in the monofunctional monomer or Methacrylated Acidic Compound having an acid value of 270 to 330 mgKOH / g is preferable. The content of both materials is preferably 1 to 30% by weight. In the case of hydroxyethyl acrylate, when the content exceeds 30% by weight, the volatilization is relatively high, and the toxicity of the UV-curable composition is increased. If the acidified acidic compound is added in excess of 30% by weight, the surface may be sticky. The photopolymerization initiator acts to initiate the reaction by absorbing ultraviolet light to generate free radicals. The wavelength range of absorption varies depending on the type of initiator, and most of them do not participate in the reaction. There are yellow type and low yellow type. Generally, a wavelength of 300 to 360 nm is absorbed, and two or more kinds of initiators are used together to absorb various wavelengths and promote reactivity. In addition, when the coating thickness is thin, the higher the content, the better the reactivity, and when the coating thickness is thick, the total curing rate increases as the content decreases. In the present invention, an α-hydroxyalkylphenone-based material is selected for improving reactivity among the commonly used low-yellowing type initiators. Specifically, 1-Hydroxy-cyclohexyl-phenyl Ketone or α, α-dimethoxy-α-hydroxyacetophenone (α, α-Dimethoxy-α-hydroxyacetophenone) Preference is given to mixtures of one or two substances. The content of the photopolymerization initiator is preferably 0.1 to 10% by weight based on the total composition, but in the case where the content is less than 0.1% by weight, the reactivity is slow. On the other hand, when the content exceeds 10% by weight, the reactivity is increased but the surface hardness is decreased. there is a problem. According to one embodiment of the ultraviolet curable composition according to the present invention, the antiblocking agent is included to reduce the friction between the films to improve sliding properties. The antiblocking agent can be used without particular limitation as long as it is a conventional one known in the art, but it is particularly preferable to adjust the dynamic friction coefficient of the film to 0.4 or less by adding silica or organic fine particles having a particle diameter of 0.1 to 10 μm. In the present invention, the content of the antiblocking agent is preferably adjusted to 0.005 to 0.5% by weight, if the content is less than 0.005% by weight, the blocking resistance is insufficient, if the content exceeds 0.5% by weight the transparency of the cured layer is lowered do. On the other hand, the ultraviolet curable composition may optionally include an additive component. For example, it may include a leveling agent to increase the smoothness of the paint, a wettting agent to reduce the surface tension of the paint to improve the wettability to the base film, UV stabilizers or other materials. In the ultraviolet curable composition of this invention, silicone diacrylate is contained as an additive. This material does not migrate to the film surface due to the property of causing a direct curing reaction with the oligomer backbone, and serves to give the film excellent wettability and leveling property. The content of the silicone diacrylate is preferably 0.1 to 5% by weight, and the side effect of clouding of the surface occurs when used in excess. Hereinafter, the manufacturing method of the scratch resistant film using the ultraviolet curable composition by this invention is demonstrated. The method for applying the prepared composition to the base film is not particularly limited as long as it is a method commonly known in the art and may be adopted. For example, the shape of the base film in an air knife method, gravure method, reverse roll method, kiss roll method, spray method or blade method And can be used arbitrarily selected according to the material. As for application thickness, about 1-10 micrometers is suitable. If the coating thickness is less than 1 µm, it is difficult to obtain a sufficient cured coating film. If the coating thickness is more than 10 µm, the coating film is difficult to be used due to the disadvantage that the coating film has a low flexibility. After applying the ultraviolet curable composition to the base film using the method described above, the cured coating film is formed by irradiating ultraviolet rays after heating and drying by irradiating hot air, infrared rays, far infrared rays, or the like, or irradiating ultraviolet rays immediately without such a drying process. . The type of ultraviolet lamp used for ultraviolet irradiation is also not particularly limited as long as it is commonly used. For example, a high pressure mercury lamp, an ultra high pressure mercury lamp, an electrodeless lamp, a metahalide lamp and the like can be used. Cured coating film is formed by irradiating an ultraviolet-ray, moving the lamp whose output is 60-240W / cm by the belt conveyor type. The ultraviolet curable composition according to the present invention is hardly affected by oxygen, and thus can be cured in air without the need for an inert environment such as nitrogen. The distance between the ultraviolet lamp and the base film is maintained at about 30 to 300 mm. Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the following examples are merely examples given to show the effects of the present invention, and the scope of the present invention is not limited by the following examples. In the following Examples and Comparative Examples, the physical properties of the prepared scratch-resistant film was evaluated by the following method. (1) adhesion After cross hatching the coating film at 1 mm intervals, the number remaining without peeling when the cellophane tape is attached and peeled off is grasped and evaluated as defective or good. (2) pencil hardness Under the conditions of Japanese Industrial Standards (JIS) JIS-K5400, evaluation was made using a pencil made by Steadler with a pencil hardness meter of Sheen. The pencils used were 6B, 5B, 4B, 3B, 2B, B, HB, F, H, 2H, 3H, 4H, 5H, 6H, 7H, 8H, 9H. (3) scratch resistance The coating film was rubbed with a steel batter having a diameter of 10 µm to visually observe the occurrence of scratches and evaluated as defective or good. (4) chemical resistance After immersion in a 5% aqueous sodium hydroxide solution and a 5% aqueous hydrochloric acid solution at room temperature for 4 hours, respectively, it is evaluated as poor or good depending on whether or not the physical properties of the coating film change. (5) solvent resistance After immersion for 48 hours in toluene, acetone, methyl ethyl ketone, methanol, isopropyl alcohol, butyl acetate and the like at room temperature, it is evaluated as poor or good according to the change of physical properties of the coating film. (6) yellowness Evaluation is carried out using HunterLab's ColorQUEST II under the conditions of ASTM D1925. (7) coefficient of friction Measurements were made at 23 ± 2 ° C. and relative humidity 55 ± 5% using HEIDON-14DR under the conditions of ASTM D 1894-78. (8) haze Measurement was performed using a HunterLab colorimeter (model name: ColorQUEST II) under the conditions defined in ASTM D 1003. (9) blocking resistance Four 5-cm square samples are made of the film on which the ultraviolet curable layer is formed, and two sheets are overlapped so that the cured layer abuts. It is placed between glass plates and heated at 80 ° C. for 30 minutes with a load of 5 kg. After cooling for 5 minutes, the sample is observed while separating the overlapping sample. If sticking or blocking does not occur between the mutually bonded square samples, it is determined that the blocking resistance is good. Example 1 The UV curable composition having the composition described below was applied onto an untreated polyethylene terephthalate film having a thickness of 100 μm using a Mayer bar of 0.05 mm, dried at 50 ° C. for 20 seconds, and then irradiated with an ultraviolet irradiation device (F450, manufactured by Fusion, USA) and an ultraviolet lamp ( Ultraviolet rays were irradiated on the surface of the coated film by using an electrodeless type H-bulb) manufactured by Fusion, USA. The ultraviolet irradiation distance was 50 mm, and the belt speed was adjusted so that accumulated light amount might be 200 mJ / sq.cm. The coating film thickness of the ultraviolet curable resin layer formed in this way was 3 micrometers. The physical properties of the film produced as described above are measured and shown in Table 1. 69.96 parts by weight of a 6 functional aliphatic urethane acrylate oligomer (Ebecryl 1290, manufactured by UCB Chemicals) 5.0 parts by weight of trimethylolpropane triacrylate (SR 350, product of Sartomer) 10.0 parts by weight of pentaerythritol tri / tetra acrylate mixture (PETA, manufactured by UCB Chemicals) 3.0 parts by weight of methacrylated acidic compound (Ebecryl 169, manufactured by UCB Chemicals) 5.0 parts by weight of hydroxyethyl acrylate (HEA, manufactured by UCB Chemicals) 6.0 parts by weight of α-hydroxy ketone (Irgacure 184, manufactured by Ciba-geigy) 1.0 part by weight of leveling agent (Silwet L7602, manufactured by Union Carbide) 0.04 part by weight of melamine-formaldehyde condensate (Epostar S12, product of Japan Catalyst) 50.0 parts by weight of isopropyl alcohol Example 2 The UV curable composition having the following composition was applied onto an untreated polyethylene terephthalate film having a thickness of 25 μm using a 200-mesh gravure roll and dried at 50 ° C. for 20 seconds, followed by an ultraviolet irradiation device (F450, manufactured by Fusion, USA), and output 80 W / Ultraviolet rays were irradiated onto the surface of the coated film using an ultraviolet lamp composed of 4 cm high-pressure mercury lamps. The ultraviolet irradiation distance was 150 mm, and the belt speed was adjusted so that accumulated light amount might be 200 mJ / sq.cm. The coating film thickness of the ultraviolet curable resin layer formed in this way was 2 micrometers. The physical properties of the film produced as described above are measured and shown in Table 1. 69.97 parts by weight of a 6 functional aliphatic urethane acrylate oligomer (Ebecryl 1290, manufactured by UCB Chemicals) 5.0 parts by weight of trimethylolpropane triacrylate (TMPTA, manufactured by UCB Chemicals) 10.0 parts by weight of pentaerythritol tri / tetra acrylate mixture (PETA, manufactured by UCB Chemicals) 3.0 parts by weight of methacrylated acidic compound (Ebecryl 169, manufactured by UCB Chemicals) 5.0 parts by weight of hydroxyethyl acrylate (HEA, manufactured by UCB Chemicals) 6.0 parts by weight of α-hydroxyalkyl phenone (Darocure 1173, manufactured by Ciba-geigy) 1.0 part by weight of leveling agent (Fluorad FC430, product of 3M company) 0.04 parts by weight of benzoguanamine-formaldehyde condensate (Epostar MS, product of Japan Catalyst) 50.0 parts by weight of isopropyl alcohol Example 3 The UV curable composition having the composition shown below was applied onto an untreated polyethylene terephthalate film having a thickness of 100 μm using three reverse rolls and dried at 50 ° C. for 20 seconds, followed by an ultraviolet irradiation device (F450, manufactured by Fusion, USA), and output 120 W / Ultraviolet rays were irradiated onto the surface of the coated film using an ultraviolet lamp composed of 4 cm high-pressure mercury lamps. The ultraviolet irradiation distance was 150 mm, and the belt speed was adjusted so that accumulated light amount might be 200 mJ / sq.cm. The coating film thickness of the ultraviolet curable resin layer formed in this way was 3 micrometers. The physical properties of the film produced as described above are measured and shown in Table 1. 70 parts by weight of a 6 functional aliphatic urethane acrylate oligomer (Ebecryl 1290, manufactured by UCB Chemicals) 5.0 parts by weight of trimethylolpropane triacrylate (TMPTA, manufactured by UCB Chemicals) 10.0 parts by weight of pentaerythritol tri / tetra acrylate mixture (PETA, manufactured by UCB Chemicals) 3.0 parts by weight of methacrylated acidic compound (Ebecryl 169, manufactured by UCB Chemicals) 5.0 parts by weight of hydroxyethyl acrylate (HEA, manufactured by UCB Chemicals) α-hydroxy-ketone 3.0 parts by weight (Irgacure 184, manufactured by Ciba-geigy) α-hydroxy-alkyl phenone 3.0 parts by weight (Darocure 1173, manufactured by Ciba-geigy) 1.0 part by weight of leveling agent (HS-300, manufactured by UCB Chemicals) 0.01 parts by weight of silica (Gasil 23DP, Crossfield company) 50.0 parts by weight of isopropyl alcohol Example 4 The UV curable composition having the composition shown below was applied onto an untreated polyethylene terephthalate film having a thickness of 100 μm using a Mayer bar of 0.05 mm and dried at 50 ° C. for 20 seconds, followed by an ultraviolet irradiation device (F450, manufactured by Fusion, USA) and output 120 W / Ultraviolet rays were irradiated onto the surface of the coated film using an ultraviolet lamp composed of 4 cm high-pressure mercury lamps. The ultraviolet irradiation distance was 150 mm, and the belt speed was adjusted so that accumulated light amount might be 200 mJ / sq.cm. The coating film thickness of the ultraviolet curable resin layer formed in this way was 3 micrometers. The physical properties of the film produced as described above are measured and shown in Table 1. 6 functional aliphatic urethane acrylate oligomer 53.0 parts by weight (Ebecryl 1290, manufactured by UCB Chemicals) 10.0 parts by weight of trimethylolpropane triacrylate (TMPTA, manufactured by UCB Chemicals) 10.0 parts by weight of pentaerythritol tri / tetra acrylate mixture (PETA, manufactured by UCB Chemicals) 3.0 parts by weight of methacrylated acidic compound (Ebecryl 169, manufactured by UCB Chemicals) 10.0 parts by weight of hydroxyethyl acrylate (HEA, manufactured by UCB Chemicals) α-hydroxy-ketone 3.0 parts by weight (Irgacure 184, manufactured by Ciba-geigy) α-hydroxy-alkyl phenone 3.0 parts by weight (Darocure 1173, manufactured by Ciba-geigy) 1.0 part by weight of leveling agent (HS-300, manufactured by UCB Chemicals) 0.02 parts by weight of silica (MX 150, product made by Soken) 50.0 parts by weight of isopropyl alcohol Comparative Example 1 An ultraviolet curable composition having the composition described below was applied onto an untreated polyethylene terephthalate film (Skyrol, SKC, Inc.) having a thickness of 100 μm using a Mayer bar of 0.05 mm, and cured at 160 ° C. for 1 minute to form a 3 μm thick coating film. . The physical properties of the prepared film were measured and shown in Table 1. Solvent 79.7 wt% Thermosetting Acrylic Resin 15% by weight 5% by weight of melamine curing agent 0.3% by weight of acid catalyst Comparative Example 2 The physical properties of the films prepared in the same manner as in Comparative Example 1 were measured except that 15 wt% of the thermosetting urethane resin and 0.04 wt% of the melamine-formaldehyde condensate were added instead of the thermosetting acrylic resin. It is shown in Table 1. Comparative Example 3 The UV curable composition having the composition shown below was coated on a 100 μm thick untreated polyethylene terephthalate film (Skyrol, SKC Co., Ltd.) using a 0.05 mm Meyer Bar, dried at 50 ° C. for 20 seconds, and then irradiated with an ultraviolet ray irradiation device (manufactured by Fusion, USA). , F450) and an ultraviolet lamp composed of four high-pressure mercury lamps having an output power of 120 W / cm were irradiated with ultraviolet rays. The ultraviolet irradiation distance was 50 mm, and the belt speed was adjusted so that accumulated light amount might be 200 mJ / sq.cm. The coating film thickness of the ultraviolet curable resin layer formed in this way was 5 micrometers. The physical properties of the film produced as described above are measured and shown in Table 1. 60 parts by weight of bifunctional aliphatic urethane acrylate oligomer (Ebecryl 254, manufactured by UCB Chemicals) 20 parts by weight of trimethylolpropane triacrylate (SR 350, product of Sartomer) 15 parts by weight of n-vinylpyrrolidone (NVP, ISP company product) α-hydroxy-ketone 5.0 parts by weight (Irgacure 184, manufactured by Ciba-geigy) Isopropyl alcohol 30.0 parts by weight Comparative Example 4 The physical properties of the films prepared in the same manner as in Example 1 were measured except that no melamine-formaldehyde condensate was added, and the results are shown in Table 1. Comparative Example 5 The physical properties of the 100 μm polyethylene terephthalate film (Skyrol, SKC Co., Ltd.) without hard coating were measured, and the results are shown in Table 1. AdhesionPencil hardnessScratch resistanceYellow roadChemical resistanceSolvent resistanceHaze (%)Dynamic friction coefficientBlocking resistance Example 1Good2HGood2.4GoodGood1.60.2Good Example 2Good2HGood1.6GoodGood1.00.15Good Example 3Good2HGood2.3GoodGood1.70.3Good Example 4Good2HGood2.4GoodGood1.60.21Good Comparative Example 1GoodFBad2.2BadBad1.61.0 or higherBad Comparative Example 2GoodFBad2.2BadBad1.70.21Good Comparative Example 3BadFBad2.3GoodGood1.61.0 or higherBad Comparative Example 4Good2HGood2.3GoodGood1.51.0 or higherBad Comparative Example 5-HBBad2.1--1.50.6Good As can be seen from the above, the film produced by applying the ultraviolet curable composition according to the present invention to a polyester film using a conventional coating method and then irradiating with ultraviolet rays to cure is excellent in solvent resistance, chemical resistance and the like. Not only does not appear yellowing, it is not only excellent adhesion even in the absence of a primer layer, the surface hardness is high to 2H level is suitable for use in various fields of film that requires scratch resistance. Moreover, it has the advantage of favorable blocking resistance, without affecting the transparency of a hardened layer.
权利要求:
Claims (3) [1" claim-type="Currently amended] In the ultraviolet curable composition comprising an oligomer, ultraviolet reactive diluent, adhesion promoter, photopolymerization initiator, antiblocking agent and additives, The oligomer is an aliphatic urethane acrylate having a content of 40 to 70% by weight based on the total composition and 6 functional groups, The UV reactive diluent is 1 to 30% by weight based on the total composition, a mixture of two or more of the mono / polyfunctional acrylate monomer, The adhesion promoter is an amount of 1 to 30% by weight based on the total composition, at least one selected from the group consisting of hydroxy ethyl acrylate and Methacrylated Acidic Compound, The photoinitiator has a content of 0.1 to 10% by weight based on the total composition, 1-Hydroxy-cyclohexyl-phenyl Ketone and α, α-dimethoxy-α-hydroxyaceto At least one selected from the group consisting of phenones (α, α-Dimethoxy-α-hydroxyacetophenone), The antiblocking agent is silica or organic fine particles having a content of 0.005 to 0.5% by weight based on the total composition, and a particle size of 0.1 to 10㎛ The additive is UV curable composition, characterized in that the silicone diacrylate. [2" claim-type="Currently amended] A scratch resistant film comprising a polyester base film and a coating layer made of the ultraviolet curable composition of claim 1 formed on at least one surface of the base film. [3" claim-type="Currently amended] The scratch resistant film of claim 2, wherein the UV curable coating layer has a thickness of 1 to 10 μm.
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公开号 | 公开日 KR100252030B1|2000-04-15|
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公开号 | 申请日 | 公开日 | 申请人 | 专利标题
法律状态:
1998-02-26|Application filed by 장용균, 에스케이씨 주식회사 1998-02-26|Priority to KR1019980006142A 1999-09-15|Publication of KR19990070964A 2000-04-15|Application granted 2000-04-15|Publication of KR100252030B1
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