WO2016060476A1 - 광학 필름 코팅용 조성물 및 이를 포함하는 광학 필름 - Google Patents
광학 필름 코팅용 조성물 및 이를 포함하는 광학 필름 Download PDFInfo
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- WO2016060476A1 WO2016060476A1 PCT/KR2015/010850 KR2015010850W WO2016060476A1 WO 2016060476 A1 WO2016060476 A1 WO 2016060476A1 KR 2015010850 W KR2015010850 W KR 2015010850W WO 2016060476 A1 WO2016060476 A1 WO 2016060476A1
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
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- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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Definitions
- the present invention relates to an optical film coating composition and an optical film comprising the same.
- optical film for display has a direct influence on the visibility of the user in the electronic device, and the optical performance of the film becomes an important factor.
- the optical film used in the OLED or touch screen panel or the like uses a polarizing film to secure optical properties such as visibility, which is effective for improving the visibility by external light.
- optical properties such as visibility
- the present invention is ultraviolet curable acrylate resin; Mixed particles comprising inorganic nanoparticles and carbon black; And photoinitiators; To provide a composition for coating an optical film comprising a.
- the present invention is ultraviolet curable acrylate resin; Mixed particles comprising inorganic nanoparticles and carbon black; It provides a composition for optical film coating comprising; and a photoinitiator.
- the inorganic nanoparticles are BaTiO 3 , PbZrO 3 , PbTiO 3 , ZnO, ZrO 2 , HfO 2 , SrTiO 3 , SnO 2 , CeO 2 , MgO, NiO, CaO, Y 2 O 3 , TiO 2 , SiO 2 , SiC and It is possible to provide an optical film coating composition comprising at least one selected from the group consisting of a combination thereof.
- the average particle diameter of the inorganic nanoparticles may provide a composition for optical film coating that is 10nm to 100nm.
- the carbon black may provide a composition for coating an optical film having a particle diameter of 5 ⁇ m to 25 ⁇ m.
- the weight ratio of the inorganic nanoparticles and the carbon black may provide a composition for coating an optical film that is 85:15 to 90:10.
- the photoinitiator is benzoin methyl ether, 2,4,6-trimethylbenzoyl diphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, ⁇ , ⁇ -methoxy- ⁇ -hydroxyaceto Phenone, 2-benzoyl-2- (dimethylamino) -1- [4- (4-morphonyl) phenyl] -1-butanone, 2,2-dimethoxy-2-phenylacetophenone, 2, 2-dimeth Oxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenylketone, 2-benzyl-2- (dimethylamino) -1- [4- (4-morpholinyl) phenyl] It is possible to provide an optical film coating composition comprising at least one selected from the group consisting of -1-butanone and combinations thereof.
- the ultraviolet curable acrylate resin With respect to 100 parts by weight of the ultraviolet curable acrylate resin, it is possible to provide a composition for coating an optical film comprising 10 to 30 parts by weight of the mixed particles, 1 to 5 parts by weight of the photoinitiator.
- the present invention is an adhesive layer; A base layer formed on the adhesive layer; And a coating layer formed on the base layer, wherein the coating layer provides an optical film formed by curing the composition for coating an optical film according to any one of claims 1 to 7.
- the adhesive layer may provide an optical film including at least one selected from the group consisting of urethane binders, polyesters, polyolefins, acrylic binders, and combinations thereof.
- the base layer may be polyethylene terephthalate (PET), polyethylene naphthalate (PEN; polyethylene naphthalate), polycarbonate (PC), cyclic olefin polymer or copolymer (Cyclic olefin polymer or copolymer) or methylene diphenyl
- PET polyethylene terephthalate
- PEN polyethylene naphthalate
- PC polycarbonate
- Cyclic olefin polymer or copolymer Cyclic olefin polymer or copolymer
- MDI diisocyanate
- the coating layer may provide an optical film having a thickness of 0.5 ⁇ m to 1 ⁇ m.
- the coating layer may provide an optical film having a color difference L * of 95 to 99.
- the coating layer may provide an optical film having a color difference a * of ⁇ 0.16 to ⁇ 0.01.
- the coating layer may provide an optical film having a color difference b * of 0.5 to 1.
- the coating layer may provide an optical film having a light transmittance of 90% to 98%.
- the coating layer may provide an optical film having a refractive index of 1.4 to 1.5.
- the optical film coating composition according to the present invention comprises a mixed particle consisting of inorganic nanoparticles and carbon black by adjusting the transmittance according to the weight ratio of the inorganic nanoparticles and carbon black and by maintaining the thickness of the coating layer from 0.5 ⁇ m to 1 ⁇ m You can adjust the color difference.
- the optical film including the optical film coating composition may be applied to an OLED or a touch panel to implement not only excellent visibility but also excellent optical properties such as high brightness.
- FIG. 1 schematically shows a cross section of an optical film according to an embodiment of the present invention.
- the present inventors while studying the optical film for display, by adjusting the weight ratio of the inorganic nanoparticles and carbon black, it was confirmed that the transmittance of the optical film, the color difference can be adjusted for each thickness of the coating layer, and completed the present invention. .
- any configuration is formed on the “top (or bottom)" of the substrate or “top (or bottom)” of the substrate means that any configuration is formed in contact with the top (or bottom) of the substrate.
- it is not limited to not including other configurations between the substrate and any configuration formed on (or under) the substrate.
- composition for optical film coating Composition for optical film coating
- the present invention is ultraviolet curable acrylate resin; Mixed particles comprising inorganic nanoparticles and carbon black; And photoinitiators; It provides a composition for coating an optical film comprising a.
- the optical film coating composition may be used for applications such as an OLED or a touch screen panel, and at this time, it should increase the brightness and have excellent visibility.
- the composition for coating an optical film includes mixed particles having specific content ratios of specific types of inorganic nanoparticles and specific types of carbon black, thereby realizing optical properties such as high brightness and excellent visibility by controlling transmittance and color difference. have.
- the optical film coating composition according to the present invention comprises an ultraviolet curable acrylate resin, which serves as a binder to hold the nanoparticles in the coating layer, it may be an acrylate monomer or oligomer.
- an acrylate monomer or oligomer may be used as the acrylate monomer.
- acrylate oligomer various photocurable epoxy acrylate oligomers, ester acrylate oligomers, cardo acrylate oligomers, and the like may be used, and urethane acrylate oligomers are more preferable.
- the urethane acrylate oligomer is formed by polymerizing an isocyanate monomer and a polyol, and the isocyanate compound includes at least one or more selected from aliphatic isocyanate compounds, aromatic isocyanate compounds, and combinations thereof, and the polyol ( Meta) acrylic acid hydroxyalkyl ester compound.
- the epoxy acrylate may include at least one or more selected from bisphenol A diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, (meth) acrylic acid adducts of phenol novolac epoxy resins, and combinations thereof. .
- the ester acrylate may include a polyfunctional polyester acrylate compound of a polyhydric alcohol.
- the cardo-based acrylate may be a compound to which a photocurable acrylate is given by reacting at least one selected from the group consisting of a cardo-based compound, a dianhydride compound, a diol compound, diacrylic acid, and a combination thereof.
- the acrylate resin is preferably a polyfunctional acrylate resin, more preferably a bifunctional to 6 functional (having 2 to 6 acrylate groups) acrylate resin, but is not limited thereto.
- the monomer or oligomer has a higher molecular weight, the higher the UV curing rate, the higher the number of moles of the acrylic group in the molecule, and the higher the polyfunctional number, the higher the curing rate.
- the optical film coating composition includes inorganic nanoparticles, the inorganic nanoparticles are BaTiO 3 , PbZrO 3 , PbTiO 3 , ZnO, ZrO 2 , HfO 2 , SrTiO 3 , SnO 2 , CeO 2 , MgO, One or more selected from the group consisting of NiO, CaO, Y 2 O 3 , TiO 2 , SiO 2 , SiC, and combinations thereof, and more preferably SiO 2 , TiO 2, and combinations thereof.
- the inorganic nanoparticles may have an average particle diameter of 10 to 100nm. By maintaining the particle diameter in the above range it is possible to implement excellent optical properties.
- the mixed particles of the composition for coating an optical film include carbon black, and carbon black is a fine carbon powder.
- the particles are usually spherical and microcrystals are arranged in equilibrium on the surface to have high rigidity and pores.
- the carbon black may have a particle diameter of 5 to 25 ⁇ m.
- the inorganic particles maintain the nanoparticle diameter of the range and the carbon black maintains the microparticle diameter of the range, so that the inorganic nanoparticles are collected and alternately arranged in the empty space between the carbon black in the mixed particles, the coating layer To form.
- a coating layer has a refractive index that varies depending on the content of the inorganic nanoparticles, and by coating an optical film with a layer having such a different refractive index, a layer having a thickness that facilitates optical interference can be formed, and thereby color difference can be controlled.
- the weight ratio of the inorganic nanoparticles and the carbon black may be about 85:15 to about 90:10.
- the inorganic nanoparticles when the weight ratio of the inorganic nanoparticles and the carbon black is out of the range, for example, about 95: 5, the inorganic nanoparticles may be added in an excessive amount, making it difficult to control the color difference. For example, when it is about 60:40, carbon black is added excessively and there exists a possibility that light transmittance may fall more than necessary.
- the photoinitiator is benzoin methyl ether, 2,4,6-trimethylbenzoyl diphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, ⁇ , ⁇ -methoxy- ⁇ -hydroxyaceto Phenone, 2-benzoyl-2- (dimethylamino) -1- [4- (4-morphonyl) phenyl] -1-butanone, 2,2-dimethoxy-2-phenylacetophenone, 2, 2-dimeth Oxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenylketone, 2-benzyl-2- (dimethylamino) -1- [4- (4-morpholinyl) phenyl] It may include one or more selected from the group consisting of -1-butanone and combinations thereof.
- the photocurable monomer may be cured when irradiated with light, thereby forming a cured product from the optical film coating composition.
- the optical film coating composition may include about 10 to about 30 parts by weight of the mixed particles and about 1 to about 5 parts by weight of the photoinitiator based on 100 parts by weight of the ultraviolet curable acrylate resin.
- the photocuring efficiency of the optical film coating composition can be maximized, and more advantageous effects can be realized in terms of manufacturing cost and optical properties such as light transmittance and color difference. Can be.
- the optical film coating composition may contain a solvent.
- the solvent is propylene glycol monomethyl ether acetate (PGMEA), toluene (toluene), ethyl acetate (ethyl acetate), butyl acetate (butyl acetate), acetone (acetone), methanol (methanol), butyl carbitol, Butyl carbitol acetate (butyl carbitol acetate), butyl cellosolve (butyl cellosolve), butyl cellosolve acetate (butyl cellosolve acetate) and one or more selected from the group consisting of terpineol (terpineol), but is not limited thereto.
- PMEA propylene glycol monomethyl ether acetate
- toluene toluene
- ethyl acetate ethyl acetate
- butyl acetate butyl acetate (butyl
- the present invention is an adhesive layer; A base layer formed on the adhesive layer; And a coating layer formed on the base layer, wherein the coating layer provides an optical film formed by curing the optical film coating composition.
- FIG. 1 shows a simplified cross section of an optical film according to the invention.
- the optical film 100 includes an adhesive layer 10, a base layer 20, and a coating layer 30.
- the adhesive layer 10 may include at least one selected from the group consisting of urethane binders, polyesters, polyolefins, acrylic binders, and combinations thereof.
- the base layer 20 is glass; Transparent film; Or a polymer film such as polyester, polycarbonate, polyolefin, polyvinyl resin, or the like.
- the base layer 20 may be polyethylene terephthalate (PET), polyethylene naphthalate (PEN; polyethylene naphthalate), polycarbonate (PC), cyclic olefin polymer or copolymer (Cyclic olefin polymer or copolymer) or Methylene diphenyl diisocyanate (MDI) is most preferred in terms of processability, thermal stability and transparency.
- the surface of the substrate layer 20 may be modified by a surface treatment known to those skilled in the art, for example, a surface treatment such as corona or plasma, so as to control adhesion and surface tension in a subsequent process.
- the primer layer may control the temperature transfer between the base layer 20 and the adjacent layer, and may improve the adhesion between the base layer 20 and the adjacent layer.
- a suitable material for such a primer layer one or more selected from the group consisting of acrylic resins, polyurethane resins, and polyester resins may be used.
- the coating layer 30 may have a thickness of about 0.5 ⁇ m to about 1 ⁇ m. If the thickness of the coating layer 30 is less than about 0.5 ⁇ m, there is a problem that it is difficult to ensure the thickness uniformity of the coating layer 30 according to the formation, if it exceeds about 1 ⁇ m, the curability for forming the coating film is lowered, and cured Thereafter, there is a problem in that the coating layer 30 is vulnerable to cracking, thereby realizing excellent optical properties in the above range.
- the L * is a brightness
- the a * is a red-green
- the b * is a value between yellow-blue bar white light source (D65) to the cured product in the wavelength region of about 380nm to about 780nm
- the values transmitted through the light may be represented by color difference a * and color difference b *.
- the coating layer 30 may have a color difference b * of about 0.5 to about 1, and specifically about 0.6 to about 0.8.
- the color difference b * is a factor influencing the high temperature reliability of the pressure-sensitive adhesive, the color difference is adjusted according to the thickness of the coating layer 30, for example, when the thickness of the coating layer 30 is about 0.5 ⁇ m, color difference b When * is about 0.86 and the thickness of the coating layer 30 is about 0.8 ⁇ m, the color difference b * may be about 0.84.
- the coating layer 30 may have a color difference a * of about ⁇ 0.16 to about ⁇ 0.01. Since color difference a * of the said hardened
- the coating layer 30 may have a color difference L * of about 95 to about 99. Since the color difference L * of the cured product satisfies the above range, it is effective to prevent the visibility of the display from being disturbed by external light when using it in a touch panel.
- the coating layer 30 may have a light transmittance of about 90 to about 98%.
- the coating layer 30 including the light transmittance of about 90 to about 98% Can be secured.
- the light transmittance is less than about 80%, the coating layer 30 may be difficult to implement excellent transparency, for example, when used in an OLED or a touch panel, there is a fear that excellent optical characteristics may not be realized.
- the coating layer 30 may have a refractive index of about 1.4 to about 1.5.
- the coating layer 30 may realize excellent visibility by satisfying the refractive index of the above range, it is possible to implement the advantage that the reflectance is lowered, the contrast ratio is improved as it is located above the base layer 20.
- UV-curable acrylate resin (UN-907, Negami), 20.7 parts by weight of inorganic nanoparticles (Thrulya4110, JGCC & C), 2.3 parts by weight of carbon black, 2 parts by weight of photoinitiator (Igacure 184, Shiba gauge)
- a composition for coating an optical film including 50 parts by weight of a solvent (Methyl ethyl ketone, Propylene Glycol Methyl Ether, Dimethylformamide) was prepared.
- a solvent Metal ethyl ketone, Propylene Glycol Methyl Ether, Dimethylformamide
- the composition was coated on the polyethylene terephthalate base layer (U48, Toray) with a thickness of 0.5 ⁇ m by a bar coating method to prepare an optical film.
- An optical film was manufactured in the same manner as in Example 1, except for including 19.5 parts by weight of inorganic nanoparticles and 3.5 parts by weight of carbon black.
- An optical film was manufactured in the same manner as in Example 1, except for including 16 parts by weight of inorganic nanoparticles and 7 parts by weight of carbon black.
- An optical film was manufactured in the same manner as in Example 1, except that the thickness of the coating layer was 3 ⁇ m.
- Light transmittance was measured using a UV-Vis spectrometer at room temperature of 20 °C to 30 °C.
- the refractive index was measured using a prism coupler (SPA-4000) at room temperature of 20 ° C to 30 ° C.
- CM-5 Konica Minolta, Colorimeter
- the optical films of Examples 1 to 2 include inorganic nanoparticles and carbon black at a weight ratio of about 5.5: 1 to 9: 1, and the refractive index is 1.4 to 1.5, and the light transmittance is 95% or more showed excellent visibility.
- the optical film implements b * between color difference 0 * 1, color difference a * relatively close to zero, and color difference L * of about 98 or more, and thus can realize an effect of excellent step absorption performance and improved visibility and transparency. have.
- Comparative Example 1 the weight ratio of the inorganic nanoparticles to the carbon black is about 2.3 to 1, which is different from the present invention.
- the light transmittance is low at 79.75%, and the refractive index exceeds 1.5.
- the color difference L * was 82.51, which is lower than that of Examples 1 to 2, and thus it can be seen that the Examples 1 to 2 realize better optical characteristics.
- Comparative Example 2 is an optical film having a thickness of 3 ⁇ m, and the absolute values of the color differences b * and a * deviate significantly from 0, so that the color difference is poorly controlled compared to the optical film according to the present invention, and thus the visibility is good. It can be seen that.
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Abstract
Description
구분 | 광학특성 | ||||
광투과율(%) | 굴절률 | 색차 b* | 색차 a* | 색차 L* | |
실시예 1 | 95.72 | 1.45 | 0.86 | -0.16 | 98.32 |
실시예 2 | 95.30 | 1.48 | 0.84 | -0.01 | 98.16 |
비교예 1 | 79.75 | 1.53 | 0.35 | -0.11 | 82.51 |
비교예 2 | 94.37 | 1.45 | 3.63 | -1.29 | 97.78 |
Claims (16)
- 자외선 경화형 아크릴레이트 수지;무기 나노입자 및 카본 블랙을 포함하는 혼합 입자; 및광개시제;를 포함하는광학 필름 코팅용 조성물.
- 제1항에 있어서,상기 무기 나노입자는 BaTiO3, PbZrO3, PbTiO3, ZnO, ZrO2, HfO2, SrTiO3, SnO2, CeO2, MgO, NiO, CaO, Y2O3, TiO2, SiO2, SiC 및 이들의 조합으로 이루어진 군으로부터 선택된 하나 이상을 포함하는광학 필름 코팅용 조성물.
- 제 1항에 있어서,상기 무기 나노입자의 평균 입경은 10nm 내지 100nm인광학 필름 코팅용 조성물.
- 제1항에 있어서,상기 카본 블랙의 입자 직경이 5㎛ 내지 25 ㎛인광학 필름 코팅용 조성물.
- 제1항에 있어서,상기 무기 나노입자와 상기 카본 블랙의 중량비는 85 : 15 내지 90 : 10인광학 필름 코팅용 조성물.
- 제1항에 있어서,상기 광개시제는 벤조인메틸에테르, 2,4,6-트리메틸벤조일 디페닐포스핀옥사이드, 비스(2,4,6-트리메틸벤조일) 페닐포스핀옥사이드, α,α-메톡시-α-하이드록시아세토페논, 2-벤조일-2-(디메틸아미노)-1-[4-(4-몰포닐) 페닐]-1-부타논, 2,2-디메톡시-2-페닐아세토페논, 2, 2-디메톡시-1,2-디페닐에탄-1-온, 1-하이드록시-사이클로헥실-페닐케톤, 2-벤질-2-(디메틸아미노)-1-[4-(4-모르폴리닐)페닐]-1-부타논 및 이들의 조합으로 이루어진 군으로부터 선택된 하나 이상을 포함하는광학 필름 코팅용 조성물.
- 제 1항에 있어서,상기 자외선 경화형 아크릴레이트 수지 100 중량부에 대하여, 상기 혼합 입자 10 내지 30 중량부, 상기 광개시제 1 내지 5 중량부를 포함하는광학 필름 코팅용 조성물.
- 접착층;상기 접착층 상부에 형성된 기재층; 및상기 기재층 상부에 형성된 코팅층을 포함하고,상기 코팅층은 제1항 내지 제7항 중 어느 한 항에 따른 광학 필름 코팅용 조성물이 경화되어 형성된광학 필름.
- 제 8항에 있어서,상기 접착층은 우레탄 바인더, 폴리 에스테르, 폴리 올레핀, 아크릴 바인더 및 이들의 조합으로 이루어진 군으로부터 선택된 하나 이상을 포함하는광학 필름.
- 제 8항에 있어서,상기 기재층은 폴리에틸렌 테레프탈레이트(PET; Polyethylene terephthalate), 폴리에틸렌 나프탈레이트(PEN; Polyethylene naphthalate), 폴리카보네이트(PC; Polycarbonate), 사이클릭 올레핀 중합체 또는 공중합체(Cyclic olefin polymer or copolymer) 또는 메틸렌 디페닐 디이소시아네이트(MDI; Methylene diphenyl diisocyanate) 재질인광학 필름.
- 제 8항에 있어서,상기 코팅층의 두께는 0.5㎛ 내지 1㎛ 인광학 필름.
- 제 8항에 있어서,상기 코팅층은 색차 L*가 95 내지 99인광학 필름.
- 제 8항에 있어서,상기 코팅층은 색차 a*가 -0.16 내지 -0.01인광학 필름.
- 제 8항에 있어서,상기 코팅층은 색차 b*가 0.5 내지 1인광학 필름.
- 제 8항에 있어서,상기 코팅층은 광투과율이 90% 내지98%인광학 필름.
- 제 8항에 있어서,상기 코팅층은 굴절률이 1.4 내지 1.5인광학 필름.
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US15/517,360 US20170299777A1 (en) | 2014-10-16 | 2015-10-14 | Optical film coating composition and optical film comprising the same |
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KR102241335B1 (ko) * | 2018-01-30 | 2021-04-16 | 주식회사 엘지화학 | 코팅 조성물 |
KR102242549B1 (ko) * | 2019-03-07 | 2021-04-20 | 주식회사 엘지화학 | 광학 필름용 조성물, 이를 포함한 광학 필름 및 디스플레이 장치 |
KR102085243B1 (ko) * | 2019-11-22 | 2020-03-04 | 태양쓰리시 주식회사 | 우수한 차광 특성을 갖는 차광 필름 및 그 제조 방법 |
CN113861844A (zh) | 2020-06-30 | 2021-12-31 | 科思创德国股份有限公司 | 一种水性涂料组合物 |
CN114605899B (zh) * | 2022-04-20 | 2023-03-21 | 广东顺德洋紫薇化工有限公司 | 一种光学膜用无卤水性uv光油 |
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