KR101469257B1 - Resin composition for optical film, optical film using the same and method for preparing thereof - Google Patents
Resin composition for optical film, optical film using the same and method for preparing thereof Download PDFInfo
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Abstract
The resin composition for an optical film of the present invention comprises an ultraviolet curable unsaturated compound, an antistatic agent, a silicone additive and an initiator, and the ultraviolet curable unsaturated compound includes a novolac acrylate derivative. The composition has excellent adhesion even in the wet state with the substrate film after the formation of the prism thin film and has excellent scratch resistance and abrasion resistance to minimize the assembly failure rate in the backlight unit assembly process and has a viscosity characteristic suitable for the sheet production process conditions Fairness.
Description
The present invention relates to a resin composition for an optical film, an optical film using the same, and a method for producing the same. More specifically, the present invention has an excellent adhesion force even in the wet state with the substrate film after the formation of the prism thin film, and has excellent scratch resistance and abrasion resistance, minimizing the assembly defect rate in the backlight unit assembling process, And having excellent processability, an optical film using the same, and a process for producing the same.
As a general image display means, there is a liquid crystal display (LCD) which allows a user to recognize information processed in an information processing apparatus using transmittance obtained by precisely controlling the orientation of the liquid crystal using the electro-optic characteristics of the liquid crystal .
On the other hand, the performance of the image display means using the optical film is greatly influenced by the performance of the back-light unit. This is based on a method of adjusting the amount of light by reflecting or transmitting light through an optical film. Therefore, various optical films having excellent optical performance have been proposed in order to effectively apply thin film optical films to image display means.
In the structure of such an optical film, the prism sheet is a film for improving the brightness of a liquid crystal display (LCD). Since a liquid crystal display (LCD) can not emit light by itself, it obtains light using a light source (CCFL or LED), distributes the light through the light guide plate as a whole area, Transform it into a light source. In this process, the efficiency of the light emitted from the initial light source is gradually decreased. When the prism sheet is used, the side light can be changed to the front light and the reflected light can be collected to increase the brightness.
The prism sheet used as the light collecting sheet is an optical film having thin film flexibility and serves to increase the brightness by forming a surface structured with a linear array of prisms on one side.
The pattern portion of the prism sheet is composed of a peak region, a valley region, and a joint region connecting the acid region and the bony region according to the height of the height, and the acid region and the joint region are formed of concavo- The irregularities are irregularly arranged, thereby improving the viewing angle and acid strength characteristics. However, the above method has the disadvantage that when the backlight unit is assembled in the assembling process, defective scratches are caused due to lack of the shape and uniformity characteristic, the backlight unit and the white wire are defective.
Among the optical films, prism sheets which are most important among the required properties of prism sheets in recent years have excellent reliability and require a prism film which minimizes the abrasion resistance or the defect rate due to foreign substances in backlight assembly. However, in order to increase abrasion resistance, it is necessary to have ductility and to have a technically opposing characteristic to have elasticity, and to reduce the foreign matter defect rate due to static electricity, it should be charged.
An object of the present invention is to provide a resin composition for an optical film having excellent adhesion with a substrate film after the formation of a prism thin film.
Another object of the present invention is to provide a resin composition for an optical film having a viscosity characteristic suitable for an optical film production process condition including a prism film and the like.
It is still another object of the present invention to provide a resin composition for an optical film having excellent elasticity, scratch resistance and abrasion resistance.
It is still another object of the present invention to provide a resin composition for an optical film having excellent antistatic properties.
It is still another object of the present invention to provide a resin composition for an optical film which not only has excellent releasability from a pull roll, but also has excellent adhesion reliability.
Another object of the present invention is to provide a resin composition for an optical film which does not cause yellowing and is excellent in thermal stability.
It is still another object of the present invention to provide an optical film having excellent reliability using the resin composition for an optical film and minimizing the abrasion resistance or the defect rate due to foreign matter during backlight assembly.
One aspect of the present invention relates to a resin composition for an optical film. The resin composition for an optical film includes an ultraviolet curable unsaturated compound, an antistatic agent, a silicone additive and an initiator, and the ultraviolet curable unsaturated compound comprises a novolak acrylate derivative.
In an embodiment, the novolac acrylate derivative may be represented by the following Formula 1:
[Chemical Formula 1]
Wherein R 1 is H, CH 3 or C 6 H 5 , and R 1 , R 2 and R 3 are selected from the group consisting of ethylene oxide, a linear alkylene group having 1 to 20 carbon atoms or a branched alkylene group having 4 to 20 carbon atoms And n is an integer of 0 to 5).
In an embodiment, the novolak acrylate derivative may have a weight average molecular weight of 100 to 3000 g / mol.
The ultraviolet curable unsaturated compound may further include at least one of an ethoxylated bisphenyl diacrylate derivative, a monofunctional ultraviolet curable monomer, and a polyfunctional ultraviolet curable monomer.
In an embodiment, the ethoxylated bisphenyl diacrylate derivative may be represented by the following formula:
(2)
Wherein X is a linear alkylene group having 1 to 10 carbon atoms or a branched alkylene group having 4 to 10 carbon atoms and n is an integer of 1 to 50,
In one embodiment, the monofunctional UV curable monomer or polyfunctional UV curable monomer is selected from the group consisting of aromatic (meth) acrylates, alicyclic (meth) acrylates, hydroxyl group containing (meth) acrylates, fluorene , Di (meth) acrylate, tri (meth) acrylate, and tetra (meth) acrylate.
In an embodiment, the resin composition for an optical film may contain 70 to 99% by weight of an ultraviolet curing type unsaturated compound, 0.01 to 10% by weight of an antistatic agent, 0.01 to 10% by weight of a silicone additive and 0.1 to 10% by weight of an initiator.
In one embodiment, the resin composition for an optical film has a refractive index of 1.56 or more, a viscosity of 800 to 1200 cp at 25 캜, and a brightness of 2100 cd / m 2 or more.
Another aspect of the present invention provides an optical film using the resin composition for an optical film.
Wherein the optical film is formed by applying the resin composition for an optical film to a mold crushing roll to form a coating layer; Bringing one side of the transparent substrate film into contact with the coating layer; Irradiating the transparent base film with ultraviolet rays to cure the coating layer; And separating the cured coating layer from the pulling roll by adhering to the transparent base film.
The thickness of the coating layer is preferably 10-50 mu m.
Disclosed is a film having excellent adhesion with a substrate film after the formation of a prism thin film, having a viscosity characteristic appropriate to optical film manufacturing process conditions, excellent elasticity, scratch resistance, abrasion resistance and antistatic properties, In addition, the resin composition for an optical film and the resin composition for an optical film, which have excellent adhesion reliability, are free from yellowing and have excellent thermal stability, have excellent reliability and minimize a defect rate due to abrasion resistance or foreign matter during backlight assembly The present invention has the effect of providing an optical film that can be used as an optical film.
The resin composition for an optical film of the present invention may contain an ultraviolet curable unsaturated compound, an antistatic agent, a silicone additive and an initiator.
UV-curable unsaturated compounds
In the resin composition of the present invention, the ultraviolet curing type unsaturated compound comprises a novolak acrylate derivative.
In an embodiment, the novolac acrylate derivative may be represented by the following Formula 1:
[Chemical Formula 1]
Wherein R 1 is H, CH 3 or C 6 H 5 , and R 1 , R 2 and R 3 are selected from the group consisting of ethylene oxide, a linear alkylene group having 1 to 20 carbon atoms or a branched alkylene group having 4 to 20 carbon atoms And n is an integer of 0 to 5).
Preferably R is C 6 H 5 and R 1 , R 2 and R 3 are - (CH 2 ) 3 -.
In an embodiment, the novolak acrylate derivative may have a weight average molecular weight of 100 to 3000 g / mol. Within this range, viscosity and productivity are advantageous.
In the present invention, the novolak acrylate derivative is 5 to 80% by weight, preferably 10 to 30% by weight, of the ultraviolet curing type unsaturated compound. In the above range, there is an advantage of excellent scratch resistance and adhesion. More preferably 15 to 25% by weight.
The ultraviolet curable unsaturated compound may further include at least one of an ethoxylated bisphenyl diacrylate derivative, a monofunctional ultraviolet curable monomer, and a polyfunctional ultraviolet curable monomer.
For example, in one embodiment, the ultraviolet curable unsaturated compound may comprise a novolac acrylate derivative, an ethoxylated bisphenyl diacrylate derivative, and a monofunctional UV curable monomer.
In another embodiment, the ultraviolet curable unsaturated compound may comprise a novolak acrylate derivative, an ethoxylated bisphenyl diacrylate derivative, and a multifunctional ultraviolet curable monomer.
In another embodiment, the ultraviolet curable unsaturated compound may include a novolak acrylate derivative, an ethoxylated bisphenyl diacrylate derivative, a monofunctional ultraviolet curable monomer, and a multifunctional ultraviolet curable monomer.
The ethoxylated bisphenyl diacrylate derivative may be represented by the following formula (2): < EMI ID =
(2)
Wherein X is a linear alkylene group having 1 to 10 carbon atoms or a branched alkylene group having 4 to 10 carbon atoms and n is an integer of 1 to 50,
Preferably, X is -C (CH 3) 2 - or -CH 2 - may be a, n can be 1-15.
The ethoxylated bisphenyl diacrylate derivative significantly improves the elasticity of the prism layer after curing, thereby exhibiting excellent resilience and exhibiting excellent scratch resistance, thereby minimizing the defective rate during assembly of the backlight unit. Preferably, it may contain 10 to 50 mol% of ethylene oxide groups.
The ethoxylated bisphenyl diacrylate derivative may be used in an amount of 0 to 60% by weight, preferably 5 to 55% by weight, of the ultraviolet curing type unsaturated compound. There is an advantage of excellent scratch resistance in the above range. More preferably 10 to 50% by weight, and most preferably 15 to 45% by weight.
The ultraviolet curable unsaturated compound may include monofunctional ultraviolet curable monomers or polyfunctional ultraviolet curable monomers.
The monofunctional or multifunctional ultraviolet ray curable monomer improves the releasability of the soft mold or nickel-plated metal mold with the pull roll in the process of the final ultraviolet curable high refractive index resin. When the mold is cured at room temperature or at high temperature / The adhesive strength can be improved and the surface hardness of the prism shape can be improved.
The polyfunctional ultraviolet curable monomer may have a bifunctionality or more, preferably 2-4 or more.
The monofunctional or multifunctional UV-curable monomer can be used without limitation with at least one monomer selected from the known (meth) acrylate-based monomer groups. Specific examples thereof include aromatic (meth) acrylate, alicyclic (meth) acrylate, hydroxyl group-containing (meth) acrylate, fluorene (meth) acrylate, di (meth) , Tetra (meth) acrylate, and the like, but are not limited thereto.
(Meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (Meth) acrylate, 4-hydroxycyclohexyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, Acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, trimethylolpropane tri (Meth) acrylate, pentaerythritol hexa (meth) acrylate, dipentaerythritol hexa (metha) acrylate, glycerin di (meth) acrylate, t- Acrylate, 2-phenoxyethyl (meth) acrylate, stearyl (meth) acrylate, lauryl (meth) acrylate, Acrylate, triethylene glycol di (meth) acrylate, tridecyl (meth) acrylate, ethoxy adduct nonylphenol (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di diethylene glycol di (meth) acrylate, t-ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, (Meth) acrylate, 2-methacryloyloxyethyl phosphate, dimethylol tricyclodecane di (meta) acrylate, di (meth) acrylate, cyclohexanedimethanol di )Ah (Meth) acrylate, phenoxybenzyl acrylate, bisphenol F type acrylate, bisphenol A type epoxy acrylate, novolac type epoxy acrylate, phenyl phenoxy ethyl acrylate, Acrylate, ethoxylated thiodiphenyl diacrylate, phenylthioethyl acrylate, and the like.
Preferred examples thereof include phenoxybenzyl acrylate, bisphenol F-based acrylate, novolac-based epoxy acrylate, phenylphenoxyethyl acrylate, bisphenol A-based epoxy acrylate, ethoxylated thiodiphenyl diacrylate, Ethyl acrylate and the like.
The monofunctional or multifunctional ultraviolet curable monomer may be used in an amount of 0 to 30% by weight, preferably 5 to 25% by weight, of the ultraviolet curing type unsaturated compound. In the above range, wettability to the base film is good, the adhesive strength is not lowered, flexibility of the polymer main chain is not degraded, and the possibility of occurrence of cracks after production of the prism film is low. More preferably 7 to 20% by weight, and most preferably 7 to 15% by weight.
The ultraviolet curable unsaturated compound of the present invention may be contained in an amount of 80 to 99% by weight based on the solid content of the resin composition for an optical film. Since the photocurable process can be used in the above range without any additional process, it is easy to produce and process. Preferably 85 to 98% by weight, more preferably 95 to 96% by weight.
In one embodiment, the ultraviolet curable unsaturated compound comprises 40 to 95% by weight of a novolak acrylate derivative, 5 to 45% by weight of an ethoxylated bisphenyl diacrylate derivative and 0 to 25% by weight of a monofunctional UV curable monomer Lt; / RTI >
In another embodiment, the ultraviolet curable unsaturated compound comprises 40 to 95% by weight of a novolac acrylate derivative, 5 to 45% by weight of an ethoxylated bisphenyl diacrylate derivative and 0 to 25% by weight of a multifunctional ultraviolet curable monomer Lt; / RTI >
In another embodiment, the ultraviolet curable unsaturated compound comprises 45 to 80% by weight of a novolac acrylate derivative, 5 to 45% by weight of an ethoxylated bisphenyl diacrylate derivative, 0 to 20% by weight of a monofunctional ultraviolet curable monomer, And 0 to 20% by weight of a functional UV-curable monomer.
Antistatic agent
The antistatic agent can prevent the electrification property in the manufacturing or assembling process of the final prism film. By adding the antistatic agent, dust in the air is prevented from adhering to the optical member due to static electricity.
The antistatic agent according to the present invention may be an ionic compound. The ionic compound preferably has compatibility with an ultraviolet curable unsaturated compound, has compatibility with an organic solvent used in preparing the composition, and is capable of maintaining transparency of the composition.
As the ionic compound suitable for the present invention, a nitrogen-containing onium salt, a sulfur-containing onium salt or a phosphorus-containing onium salt can be preferably used. Specific examples thereof include 1-butylpyridinium tetrafluoroborate, 1-butylpyridinium hexafluorophosphate, 1-butyl-3-methylpyridinium tetrafluoroborate, 1-butyl-3-methylpyridinium trifluoromethane 1-butyl-3-methylpyridinium bis (trifluoromethanesulfonyl) imide, 1-butyl-3-methylpyridinium bis (pentafluoroethanesulfonyl) imide, 1- Methyl-1-pyrrolin tetrafluoroborate, 1-ethyl-2-phenylindole tetrafluoroborate, 1,2-dimethylindole tetrafluoroborate, 1-ethylcarbazole Ethyl-3-methylimidazolium trifluoroacetate, 1-ethyl-3-methylimidazolium acetate, 1-ethyl-3-methylimidazolium trifluoroacetate, -3-methylimidazolium heptafluorobutyrate, 1- Methylimidazolium trifluoromethanesulfonate, 1-ethyl-3-methylimidazolium perfluorobutanesulfonate, 1-ethyl-3-methylimidazolium dicyanamide, 1- Ethyl-3-methylimidazolium bis (pentafluoroethanesulfonyl) imide, 1-ethyl-3-methylimidazolium iodide, Imidazolium tris (trifluoromethanesulfonyl) imide, 1-butyl-3-methylimidazolium tetrafluoroborate, 1-butyl-3-methylimidazolium hexafluorophosphate,
Butyl-3-methylimidazolium trifluoroacetate, 1-butyl-3-methylimidazolium heptafluorobutyrate, 1-butyl-3-methylimidazolium trifluoromethanesulfonate, 1- Butyl-3-methylimidazolium perfluorobutanesulfonate, 1-butyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide, 1-hexyl-3-methylimidazolium bromide, Hexyl-3-methylimidazolium chloride, 1-hexyl-3-methylimidazolium tetrafluoroborate, 1-hexyl-3-methylimidazolium hexafluorophosphate, 1-hexyl- 1-octyl-3-methylimidazolium tetrafluoroborate, 1-octyl-3-methylimidazolium hexafluorophosphate, 1-hexyl-2,3-dimethyl Imidazolium tetrafluoroborate, 1,2-dimethyl-3-propylimidazolium bis (trifluoromethanesulfonyl) ) Imide, 1-methylpyrazolium tetrafluoroborate, 3-methylpyrazolium tetrafluoroborate, tetrahexylammonium bis (trifluoromethanesulfonyl) imide, diallyldimethylammonium tetrafluoroborate, Allyldimethylammonium trifluoromethanesulfonate, diallyldimethylammonium bis (trifluoromethanesulfonyl) imide, diallyldimethylammonium bis (pentafluoroethanesulfonyl) imide, N, N- N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium trifluoromethanesulfonate N, N-diethyl-N-methyl-N- (2-methoxyethyl) ammonium bis (trifluoromethanesulfonyl) imide, Methoxyethyl) ammonium bis (pentafluoroethanesulfonyl) imide, glycidyl trimethylammonium (Triflouromethanesulfonyl) imide, glycidyl trimethylammonium bis (pentafluoroethanesulfonyl) imide, 1-butylpyridinium (trifluormethanesulfonyl) imide, glycidyltrimethylammonium bis Butyl-3-methylpyridinium (trifluoromethanesulfonyl) trifluoroacetamide, 1-ethyl-3-methylimidazolium (trifluoromethanesulfonyl) trifluoroacetamide, (Methanesulfonyl) trifluoroacetamide, diallyldimethylammonium (trifluoromethanesulfonyl) trifluoroacetamide, glycidyl trimethylammonium (trifluoromethanesulfonyl) trifluoroacetamide, N , N, N-dimethyl-N-ethyl-N-propylammonium bis (trifluoromethanesulfonyl) imide, N-dimethyl-N-ethyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, N, (Trifluoromethanesulfonyl) imide, N, N-dimethyl-N-ethyl-N-heptylammonium bis (trifluoromethanesulfonyl) (Trifluoromethanesulfonyl) imide, N, N-dimethyl-N, N-dipropylammonium bis (trifluoromethanesulfonyl) imide, N, (Trifluoromethanesulfonyl) imide, N, N-dimethyl-N-propyl-N-pentylammonium bis (trifluoromethanesulfonyl) (Trifluoromethanesulfonyl) imide, N, N-dimethyl-N-propyl-N-heptylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-butyl-N-hexyl N, N-dimethyl-N-heptylammonium bis (trifluoromethanesulfonyl) imide, N, N-dimethyl-N-pentyl (Trifluoromethanesulfonyl) imide, N, N-dimethyl-N, N-dihexylammonium bis (trifluoromethanesulfonyl) imide, trimethylheptylammonium bis N, N-diethyl-N-methyl-N-propylammonium bis (trifluoromethanesulfonyl) imide, N, N, N-diethyl-N-methyl-N-heptylammonium bis (trifluoromethanesulfonyl) imide, N-pentylammonium bis (trifluoromethanesulfonyl) imide, triethylpropylammonium bis (trifluoromethanesulfonyl) imide, triethylpentylammonium N, N-dimethyl-N-ethylammonium bis (trifluoromethanesulfonyl) imide, triethylheptylammonium bis (trifluoromethanesulfonyl) imide, (Trifluoromethanesulfonyl) imide, N, N-dipropyl-N-butyl-N-hexylammonium bis (triphenylmethanesulfonyl) imide, (Trifluoromethanesulfonyl) imide, N, N-dipropyl-N, N-dihexylammonium bis (trifluoromethanesulfonyl) imide,
N, N-dibutyl-N-methyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, N, N-dibutyl- N-methyl-N-ethyl-N-propyl-N-pentylammonium bis (trifluoromethanesulfonyl) imide, and the like can be used as the imide, trioctylmethylammonium bis (trifluoromethanesulfonyl) .
The antistatic agent may be produced by synthesis or a commercially available antistatic agent may be used. Commercially available products include 1-hexyl-3-methylimidazolium hexafluorophosphate (manufactured by Tokyo Kasei Kogyo Co., Ltd.), N-methyl-N-propylpiperidinium bis (trifluoromethanesulfonyl) imide (Manufactured by Kanto Kagaku Co., Ltd.), 1-ethylpyridinium bromide (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 1-butyl-3-methylpyridinium trifluoromethanesulfonate Products).
The antistatic agent may be contained in an amount of 0.01-10% by weight based on the solid content of the resin composition for an optical film. Within this range, an antistatic effect may be exhibited, and the ionic component may not float significantly on the surface in a high temperature / high humidity environment, so that the adhesion between the interfaces and the mechanical and optical properties of the prism may not be deteriorated. Preferably 0.1 to 5% by weight, more preferably 0.3 to 3% by weight.
Silicone additive
The silicone additive can increase the releasability between the composition and the mold in the resin composition for an optical film.
The silicone additive is not particularly limited, but polyether-modified acrylic functional polydimethylsiloxane and the like can be used.
The silicone additive may be contained in an amount of 0.01-10% by weight based on the solid content of the resin composition for an optical film. Within this range, the releasability from the mold mold may be improved, and the adhesion between the interfaces at high temperature and high humidity and the mechanical and optical properties of the prism may not be deteriorated. Preferably 0.1 to 2% by weight.
Initiator
The initiator is used for curing by ultraviolet rays in the resin composition for an optical film. As the initiator, a photopolymerization initiator, a radical initiator, and the like can be used. For example, benzene ether, benzyl ketal, alpha hydroxyalkylphenate, aminoalkylphenone, phosphine oxide and the like can be used.
Examples of such photo initiators include commercially available products such as Darocure 1173, Irgacure 184, Irgacure 127, and Darocure TPO manufactured by CIBA.
The initiator may be contained in an amount of 0.1-10% by weight based on the solid content of the resin composition for an optical film. Within the above range, the photoreactivity is high, so that the mechanical strength of the prism is not lowered, and the optical properties such as sulfur-denaturation of the prism layer may not be deteriorated. Preferably 0.5 to 6% by weight.
In addition to the resin composition, additives commonly used in the art may be added, and silicon or fluorine-modified additives may be added to impart the releasability to the metal and the polymer mold. Such additives are commercially available products such as BYK-323, BYK-331, BYK-333, BYK-337, BYK-373, BYK-375, BYK-377, BYK- TEGO Glide 411, TEGO Glide 415, TEGO Glide 420, TEGO Glide 432, TEGO Glide 435, TEGO Glide 440, TEGO Glide 450, TEGO Glide 455, TEGO Rad 2100, TEGO Rad 2200N, TEGO Rad 2250, TEGO Glide 410, Rad 2300, TEGO Rad 2500, or the like.
The resin composition for an optical film has a refractive index of 1.56 or more, a viscosity of 800 to 1200 cp at 25 캜, and a luminance of 2100 cd / m 2 or more.
The present invention provides a method for producing an optical film using the resin composition for an optical film. The method comprises: applying a resin composition for an optical film to a mold-crushing roll to form a coating layer; Bringing one side of the transparent substrate film into contact with the coating layer; Irradiating the transparent base film with ultraviolet rays to cure the coating layer; And separating the cured coating layer from the pulling roll by adhering to the transparent base film.
A prism layer is stamped on the mold depression roll. As a method of applying the resin composition for an optical film to a mold-engraving roll imprinted with a prism layer, a common application method can be used.
The base film is made of a transparent material, and examples of the base material include glass, transparent synthetic resin, and the like. Generally, a polyethylene terephthalate material can be used.
The ultraviolet rays are irradiated at a wavelength of 190 to 450 nm, preferably 250 to 430 nm, and a D-type bulb (Type-D bulb) is attached to an electromotive ultraviolet irradiator (600 W / inch) at a dose of 400 to 1500 mJ / Can be irradiated with an energy of 500 to 900 mJ / cm 2, but is not limited thereto.
The height of the prism layer of the resulting optical film may be 10-50 占 퐉.
Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.
The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.
Example
Specific specifications of the components used in the following examples and comparative examples are as follows.
A) an ultraviolet curable unsaturated compound
a1) Novolak diacrylate derivative: OPP novolac epoxy acrylate was used.
a2) ethoxylated bisphenyl diacrylate derivative:
a21) ethoxylated bisphenyl diacrylate was used.
a22) ethoxylated bisphenol A diacrylate was used.
a3) Monofunctional or multifunctional UV curable monomer:
a31) phenoxybenzyl acrylate was used.
a32) bisphenol A diacrylate was used.
B) Antistatic agent: An ammonium salt system was used.
C) Silicone Additive: BYK-3530 from BYK, a polyether-modified acrylic functional polydimethylsiloxane, was used.
D) Initiator:
d1) 2,4,6-trimethylbenzoylphosphine oxide manufactured by CIBA was used.
d2) 1-hydroxycyclohexyl phenyl ketone manufactured by CIBA was used.
Example 1-4 and Comparative Example 1: Preparation of resin composition for optical film
The components shown in the following Table 1 were mixed in the stated amounts to prepare a resin composition for an optical film.
Experimental Example: Evaluation of Physical Properties of Prism Film Prepared by Resin Composition for Optical Film
The resin composition for an optical film prepared in the above Examples and Comparative Examples was coated on a metal plate having a prism layer formed thereon, and a surface of a transparent PET base film (Kolon H32P 125 占 퐉) was brought into contact with a coating surface coated on the metal plate Was irradiated with ultraviolet rays toward the transparent base film to photo-cure the coated composition. The cured coating layer was separated from the engraved metal plate to form a prism layer, which was a three-dimensional structure, on one side of the transparent PET base film to a thickness of 26 mu m. The ultraviolet ray was irradiated with a wavelength of 190 to 460 nm, and the ultraviolet ray system used for photocuring was irradiated with energy of 300 mJ / cm 2 using a non-electromotive ultraviolet irradiation apparatus (600 W / inch) Type-D bulb manufactured by Fusion Corporation of USA.
The prepared prism films were evaluated for their physical properties by the following methods, and the results are shown in Table 2 below.
≪ Property evaluation method &
1) Refractive index
In order to measure the refractive index of the resin composition for an optical film, the refractive index was measured using a refractometer (model name: 4T, Japan ATAGO ABBE). The light source for the measurement was a 589.3 nm D light sodium lamp.
2) Adhesion (residual number / 100)
The number of prism layer regions remaining when a prism layer alone was cut out in a matrix structure of 1 cm x 1 cm in a prism layer with a NITTO tape adhered thereon and vertically released was displayed.
3) Flexibility
After the prism layer was formed on the transparent PET base film, when the half of the prism layer was folded with the prism layer facing outward, the state of adhesion between the base film and the coating was visually determined.
A: very good, good: good, poor: poor
4) Ultraviolet yellowing (△ YI)
After leaving for 200 hours at 50 ° C and 0.34 W / m 2 Weather-O-meter, the color coordinates were measured in the same manner as in the luminance evaluation method.
5) Brightness (Cd / m2)
The prepared prism film was fixed to a backlight unit for a 15.4-inch liquid crystal display panel, and the brightness was measured at 25 points and 13 points using a luminance meter (Model: BM-7, TOPCON Japan).
6) Antistatic property (surface resistance) (? / C㎡)
The surface resistance was measured by applying a constant voltage using DSM-8103 manufactured by Dong-A Battery Industry Co., Japan.
7) Viscosity (CPS)
The resin viscosity at 25 占 폚 was measured using a Brookfield viscometer (DV-II + Pro).
8) Wear resistance
After placing the prism layer of the prepared prism film and the AG coated portion of the liquid crystal display panel layer in contact with each other, 200 g, 100 g, and 50 g weight were placed at intervals of about 3 cm, and then the prism film was moved upward and downward After 5 repetitions, the degree of abrasion was visually identified.
?: Very good,?: Good,?: Fair, X: bad
9) Elasticity: It was measured by Microindenta WIN-HCU of fischer and evaluated by the restoration ratio. The prepared prism film was cut into a size of about 10 * 10 cm and then placed on a fischer WIN-HCU microindentation measuring cell. The resultant was pressed with a Vickers type tip for 10 seconds at a force of 10 N / cm & To come up. The restoration rate was calculated by dividing the depth of the remaining surface from the depth of the first press.
As shown in Table 2, the prism films made of the resin composition for an optical film of the present invention exhibited uniformly all the physical properties such as refractive index, adhesive force, flexibility, ultraviolet yellowing, brightness, antistatic property and abrasion resistance, And the viscosity characteristics appropriate to the conditions were shown.
While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Such changes and modifications are intended to fall within the scope of the present invention unless they depart from the scope of the present invention. Accordingly, the scope of the present invention should be determined by the following claims.
Claims (11)
The resin composition for an optical film has a refractive index of 1.56 or more,
Wherein the film made of the resin composition for an optical film has a luminance of 2100 cd / m 2 or more and a surface resistance of 1.5 × 10 11 to 5.4 × 10 11 Ω / cm 2.
[Chemical Formula 1]
Wherein R 1 is H, CH 3 or C 6 H 5 , and R 1 , R 2 and R 3 are selected from the group consisting of ethylene oxide, a linear alkylene group having 1 to 20 carbon atoms or a branched alkylene group having 4 to 20 carbon atoms And n is an integer of 0 to 5).
Wherein the ethoxylated bisphenyl diacrylate derivative is represented by the following formula (2): < EMI ID =
(2)
(Wherein X is a linear alkylene group having 1 to 10 carbon atoms or a branched alkylene group having 4 to 10 carbon atoms, and n is an integer of 1 to 50,
Wherein the multifunctional ultraviolet curable monomer comprises at least one of di (meth) acrylate, tri (meth) acrylate or tetra (meth) acrylate.
Bringing one side of the transparent substrate film into contact with the coating layer;
Irradiating the transparent base film with ultraviolet rays to cure the coating layer; And
Adhering to the transparent substrate film to separate the cured coating layer from the pull roll;
≪ / RTI > comprising the steps of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100138327A KR101469257B1 (en) | 2010-12-29 | 2010-12-29 | Resin composition for optical film, optical film using the same and method for preparing thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020100138327A KR101469257B1 (en) | 2010-12-29 | 2010-12-29 | Resin composition for optical film, optical film using the same and method for preparing thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20120076254A KR20120076254A (en) | 2012-07-09 |
| KR101469257B1 true KR101469257B1 (en) | 2014-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020100138327A KR101469257B1 (en) | 2010-12-29 | 2010-12-29 | Resin composition for optical film, optical film using the same and method for preparing thereof |
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| KR (1) | KR101469257B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024010189A1 (en) * | 2022-07-07 | 2024-01-11 | 주식회사 엘지화학 | (meth)acrylate-based resin, and dry film solder resist comprising same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100853311B1 (en) * | 2007-07-03 | 2008-08-20 | 김인열 | A light and insect proof coating composition, a coated layer using the same and a preparation method thereof |
| US20080305301A1 (en) * | 2007-06-08 | 2008-12-11 | Eternal Chemical Co., Ltd. | Optical film containing organic particles having narrow particle size distribution |
| KR20100069988A (en) * | 2008-12-17 | 2010-06-25 | 제일모직주식회사 | Resin composition for optical film and method for fabricating optical film using the same |
| KR20110137958A (en) * | 2010-06-18 | 2011-12-26 | 주식회사 블루폴리텍 | High refractive ultraviolet cured resin composition for optical film |
-
2010
- 2010-12-29 KR KR1020100138327A patent/KR101469257B1/en not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080305301A1 (en) * | 2007-06-08 | 2008-12-11 | Eternal Chemical Co., Ltd. | Optical film containing organic particles having narrow particle size distribution |
| KR100853311B1 (en) * | 2007-07-03 | 2008-08-20 | 김인열 | A light and insect proof coating composition, a coated layer using the same and a preparation method thereof |
| KR20100069988A (en) * | 2008-12-17 | 2010-06-25 | 제일모직주식회사 | Resin composition for optical film and method for fabricating optical film using the same |
| KR20110137958A (en) * | 2010-06-18 | 2011-12-26 | 주식회사 블루폴리텍 | High refractive ultraviolet cured resin composition for optical film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024010189A1 (en) * | 2022-07-07 | 2024-01-11 | 주식회사 엘지화학 | (meth)acrylate-based resin, and dry film solder resist comprising same |
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| KR20120076254A (en) | 2012-07-09 |
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