WO2015064928A1 - Feuille multicouches à très haute dureté - Google Patents

Feuille multicouches à très haute dureté Download PDF

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Publication number
WO2015064928A1
WO2015064928A1 PCT/KR2014/009543 KR2014009543W WO2015064928A1 WO 2015064928 A1 WO2015064928 A1 WO 2015064928A1 KR 2014009543 W KR2014009543 W KR 2014009543W WO 2015064928 A1 WO2015064928 A1 WO 2015064928A1
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Prior art keywords
weight
parts
layer
high hardness
multilayer sheet
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PCT/KR2014/009543
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English (en)
Korean (ko)
Inventor
박환석
황덕율
권동주
이종훈
신창학
예성훈
송예리
유다영
남해림
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(주)엘지하우시스
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Priority to JP2016527358A priority Critical patent/JP6524077B2/ja
Priority to CN201480058941.9A priority patent/CN105705332B/zh
Publication of WO2015064928A1 publication Critical patent/WO2015064928A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/536—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/584—Scratch resistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/71—Resistive to light or to UV
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays

Definitions

  • It relates to a high hardness multilayer sheet.
  • a liquid crystal window containing polymethyl methacrylate (PMMA) resin as a main raw material has excellent weather resistance and scratch resistance, but has a low impact resistance.
  • PMMA polymethyl methacrylate
  • the popularity of ultra-slim mobile devices and large LCD Along with the diffusion, disadvantages of the existing polymethyl methacrylate (PMMA) resins are highlighted.
  • various attempts are being made to reinforce the weakened impact resistance while reducing the thickness of the mobile device window to about 0.5 mm, which is about half of the existing one, and removing various protective films to reduce the overall module thickness.
  • One embodiment of the present invention provides a high hardness multilayer sheet including a laminated structure of a polymethyl methacrylate layer and a polycarbonate layer.
  • Another embodiment of the present invention provides a high hardness multi-layer sheet that is optimized by constituting the components of the polymethyl methacrylate layer and the polycarbonate layer, and is produced by an extrusion process exhibiting excellent physical properties.
  • about 75 parts to about 88 parts by weight of the (meth) acrylic acid ester monomer, about 2 parts to about 5 parts by weight of the styrene monomer and about 10 parts to about 20 parts by weight of the N-substituted maleimide monomer Polymethyl methacrylate layer containing an acrylic copolymer formed in parts by weight; And it provides a high hardness multilayer sheet which is a laminated structure of a polycarbonate layer comprising a polycarbonate copolymer.
  • the polymethyl methacrylate layer may have a thickness of about 40 um to about 70 um.
  • the glass transition temperature of the acrylic copolymer may be about 130 ° C to about 140 ° C.
  • the weight average molecular weight of the acrylic copolymer may be about 100,000 to about 150,000.
  • the polymethyl methacrylate layer may further include about 0.1 parts by weight to about 1.5 parts by weight of antioxidant and about 0.5 parts by weight to about 3.0 parts by weight of UV stabilizer based on 100 parts by weight of the acrylic copolymer.
  • the thickness of the polycarbonate layer may be about 900um to about 950um.
  • the glass transition temperature of the polycarbonate copolymer may be about 140 ° C to about 150 ° C.
  • the melt index of the polycarbonate copolymer may be about 3 to about 22.
  • the amount of the polycarbonate copolymer may further include about 0.3 parts by weight to about 2.0 parts by weight of antioxidant and about 0.5 parts by weight to about 3.0 parts by weight of UV stabilizer.
  • the polymethyl methacrylate layer and the polycarbonate layer may be formed by coextrusion.
  • a hard coating layer may be further included on the polymethyl methacrylate layer or below the polycarbonate layer.
  • the pencil hardness of the high hardness multilayer sheet may be about 4H or more.
  • the warpage of the high hardness multilayer sheet may be about 0.1 mm or less.
  • the high hardness multilayer sheet may have excellent scratch resistance while ensuring excellent dimensional stability.
  • the high hardness multilayer sheet is excellent in bending characteristics under high temperature and high humidity conditions and can be easily applied to various electronic products.
  • Figure 1 shows a cross section of a high hardness multilayer sheet which is an embodiment of the present invention.
  • Figure 2 shows a cross section of a high hardness multilayer sheet which is another embodiment of the present invention.
  • Figure 3 shows a cross section of a high hardness multilayer sheet which is another embodiment of the present invention.
  • Tempered glass is typically applied to most mobile devices such as smartphones or tablet product windows.
  • plastic cover is advantageous in various aspects such as cracking characteristics, price, and process yield compared to tempered glass, the demand for plastic cover is continuously increasing.
  • components exhibiting optical properties similar to tempered glass may be polymethylmethacrylate (hereinafter referred to as PMMA), polycarbonate (hereinafter referred to as PC), or the like.
  • PMMA polymethylmethacrylate
  • PC polycarbonate
  • the PMMA has high scratch resistance and excellent optical properties, but has a limitation in impact resistance.
  • the PC has excellent impact properties but shows a limited scratch resistance.
  • the present invention 75 to 88 parts by weight of the (meth) acrylic acid ester monomer, 2 to 5 parts by weight of styrene monomer and 10 parts by weight of N-substituted maleimide monomer Polymethyl methacrylate layer containing an acrylic copolymer formed by 20 parts by weight; And it provides a high hardness multilayer sheet which is a laminated structure of a polycarbonate layer comprising a polycarbonate copolymer.
  • the high hardness multilayer sheet is optimized by constituting the polymethyl methacrylate layer and the polycarbonate layer, and is manufactured by an extrusion process to ensure excellent dimensional stability and may have excellent scratch resistance.
  • the high hardness multilayer sheet is excellent in bending characteristics under high temperature and high humidity conditions and can be easily applied to various electronic products.
  • the polymethyl methacrylate layer (hereinafter referred to as PMMA layer) may include 75 to 88 parts by weight of (meth) acrylic acid ester monomer, 2 to 5 parts by weight of styrene monomer, and 10 to 20 parts by weight of N-substituted maleimide monomer. It may include an acrylic copolymer formed in parts by weight.
  • the acrylic copolymer may include a (meth) acrylic acid ester monomer, a styrene monomer, and an N-substituted maleimide monomer at the same time to ensure excellent heat resistance, thereby ensuring excellent bending characteristics at high temperature and high humidity.
  • the (meth) acrylic acid ester monomer when included outside the above range it may not ensure the durability of the acrylic copolymer.
  • the N-substituted maleimide monomer when included outside the above range, a glass transition temperature of the acrylic copolymer may be lowered, thereby causing problems such as warpage deformation due to lower heat resistance.
  • the PMMA layer may not secure physical properties such as scratch resistance and durability.
  • the (meth) acrylic acid ester monomer is methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate , t-butyl (meth) acrylate, pentyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylic At least one selected from the group consisting of latex, 2-ethylbutyl (meth) acrylate, and combinations thereof.
  • the N-substituted maleimide monomer is N-phenyl maleimide, maleimide, N-methyl maleimide, N-ethyl maleimide, N-propyl maleimide, N-isopropyl maleimide, N-butyl maleimide, N- Isobutyl maleimide, Nt-butyl maleimide, N-cyclohexyl maleimide, N-chlorophenyl maleimide, N-methylphenyl maleimide, N-bromophenyl maleimide, N-naphthyl maleimide, N-la Uryl maleimide, N-hydroxyphenyl maleimide, N-methoxy phenylmaleimide, N-carboxy phenylmaleimide, N-nitrophenyl maleimide and N-benzyl maleimide.
  • the thickness of the PMMA layer may be about 40um to about 70um.
  • the thickness of the PMMA layer can be controlled by the extrusion amount of the PMMA layer resin composition introduced into the feed block from the extruder, so that the amount of the PMMA layer resin composition introduced is always uniformly maintained in order to maintain the thickness of the PMMA layer accurately. It may be necessary to introduce a precise adjustment of the extrusion amount.
  • the thickness of the PMMA layer When the thickness of the PMMA layer is increased, scratch properties are improved, but impact physical properties are reduced. In addition, when the thickness of the PMMA layer is reduced, the stretch characteristics are reduced but the impact properties are improved. Both of them are usually in a trade-off relationship. Therefore, by adjusting the thickness of the PMMA layer in the range of about 40um to about 70um, it is possible to optimize the balance of physical properties with the polycarbonate layer by simultaneously securing a desired level of scratch and impact properties.
  • the glass transition temperature of the acrylic copolymer may be about 130 ° C to about 140 ° C. If the glass transition temperature of the acrylic copolymer is less than about 130 ° C there is a risk of showing a limit to durability at high temperature, high humidity conditions, when exceeding about 140 ° C color discoloration is severe and the polymethyl methacrylate layer is easily broken Problems may arise.
  • the weight average molecular weight of the acrylic copolymer may be about 100,000 to about 150,000.
  • the weight average molecular weight means an average molecular weight obtained by averaging the molecular weights of the component molecular species of a polymer compound having a molecular weight distribution in a weight fraction, whereby the weight average molecular weight of the acryl-based copolymer maintains the above range, thereby providing mechanical strength and polycarbonate.
  • the polymethyl methacrylate layer may further include about 0.1 parts by weight to about 1.5 parts by weight of antioxidant and about 0.5 parts by weight to about 3.0 parts by weight of UV stabilizer based on 100 parts by weight of the acrylic copolymer.
  • the antioxidant prevents crosslinking of the polymer that may occur during discoloration and processing, and maintains the long-term physical properties of the PMMA layer, and also serves to prevent discoloration.
  • octadecyl-3- (3,5-di-talt-butyl-4-hydroxyphenyl) propionate tris (2,4-di-talt-butylphenyl) phosphite, tetrakis [methylene -3- (3,5-di-talt-butyl-4-hydroxyphenyl) propionate] methane, 4,4'-thiobis (6-talt-butyl-m-cresol), pentaerythritol Tetrakis (3-laurylthiopropionate) and the like.
  • the antioxidant may include from about 0.1 parts by weight to about 1.5 parts by weight with respect to 100 parts by weight of the acrylic copolymer, by maintaining the above range can inhibit decomposition due to processing can maintain stable physical properties.
  • the UV stabilizer serves to prevent aging phenomenon such as cracking and discoloration caused by ultraviolet rays when the plastic is exposed to sunlight for a long time.
  • examples of the UV stabilizer include benzophenone, benzotriazole, and HALS.
  • Known materials such as systems may be used mainly, but are not limited thereto.
  • the UV stabilizer may include about 0.5 parts by weight to about 3.0 parts by weight with respect to 100 parts by weight of the acrylic copolymer, it is possible to effectively suppress discoloration by UV by maintaining the above range.
  • the polycarbonate layer (hereinafter, referred to as a PC layer) may include a polycarbonate copolymer.
  • the polycarbonate copolymer has no particular structural limitation and may be formed by interfacial polymerization or melt polymerization.
  • LUPOY PC1201-08 (LG Chem) or LUPOY PC 1300-30 (LG Chem) may be used as the polycarbonate copolymer.
  • the thickness of the PC layer may be about 900um to about 950um.
  • the thickness control of the PC layer can be controlled by the extrusion amount of the PC layer resin composition introduced into the feed block from the extruder, so that the amount of the PC layer resin composition introduced is always maintained in order to maintain the thickness of the PC layer resin composition accurately. It may be necessary to introduce uniformly to precisely control the amount of extrusion.
  • the glass transition temperature of the polycarbonate copolymer may be about 140 ° C to about 150 ° C. If the glass transition temperature of the polycarbonate copolymer is less than about 140 ° C there is a risk that the physical properties at high temperature, high humidity conditions may be lowered, and when the glass transition temperature exceeds about 150 ° C may cause a problem that the processing temperature increases.
  • the melt index of the polycarbonate copolymer may be about 3 to about 22.
  • Melt Index (MI) refers to the melt flow index, which refers to the weight of resin flowing through a capillary tube for 10 minutes at a constant load and temperature.
  • melt index of the polycarbonate copolymer is less than 3, it is necessary to control the temperature high during the extrusion operation due to the fluidity of the polycarbonate copolymer, and the difference between the upper layer PMMA layer and the deep layer may be a problem of layer thickness and uniformity have. In addition, when the melt index exceeds 22, there may be a problem that sheet workability worsens in the T-die during extrusion of the polycarbonate copolymer.
  • the amount of the polycarbonate copolymer may further include about 0.3 parts by weight to about 2.0 parts by weight of antioxidant and about 0.5 parts by weight to about 3.0 parts by weight of UV stabilizer. Matters regarding the antioxidant and UV stabilizer are as described above.
  • the polymethyl methacrylate layer and the polycarbonate layer may be formed by coextrusion.
  • Coextrusion refers to a method of making a coating film and a sheet by adding one or more layers during extrusion coating, film or sheet production using one or more extruders.
  • the coextrusion process is not particularly limited and may form the PMMA layer and the PC layer by a general coextrusion process.
  • the coextrusion process is suitable for realizing the properties to be implemented by the high hardness multilayer sheet of the PMMA layer / PC layer structure, the PMMA layer implements excellent scratch and appearance properties, the PC layer is excellent (toughness) characteristics and heat resistance can be implemented, it is possible to control the physical properties of the high-hardness sheet as a whole.
  • a hard coating layer may be further included on the polymethyl methacrylate layer or below the polycarbonate layer.
  • the hard coating layer is to increase the hardness of the multi-layer sheet, and to prevent problems causing secondary appearance defects. Referring to Figures 2 and 3, the high-hardness multilayer sheet 100 is from the top, the hard coating layer ( 30), the PMMA layer 10 and the PC layer 20 or the hard coating layer 30, the PMMA layer 10, the PC layer 20 and the hard coating layer 30 may be included.
  • a urethane acrylate copolymer series may be used as a component of the hard coating layer.
  • the urethane acrylate copolymer-based hard coating resin is a resin prepared by copolymerization of an acryl-based monomer having a hydroxy group, a urethane-based polyol and isocyanate, polyether polyol, polyester polyol, polycaprolactone polyol, polybaconate polyol
  • Polyol components such as polybutadiene polyol, aromatic isocyanates such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI) or isophorone diisocyanate (IPDI; Isophorone diisocyanate), hexamethylene diisocyanate
  • Aliphatic isocyanates such as (HMDI; Hexamethylene diisocyanate) can be reacted to select an appropriate raw material having elasticity capable of three-dimensional molding and scratch
  • the thickness of the hard coating layer may be about 5um to about 30um.
  • the thickness of the hard coating layer is less than 5um, there is a problem that a glossiness change of the film may occur, and when the thickness of about 30um is exceeded, cracks may occur in the hard coating layer.
  • An additive may be further included in the hard coating layer, and the additive may include a silicone-based additive (reactive monomer / oligomer having a silicone group), a fluorine-based additive (reactive monomer / oligomer having a fluorine group), a resin having a silicone group or a fluorine group, a surfactant, One or more selected from the group consisting of oil can be used.
  • a silicone-based additive reactive monomer / oligomer having a silicone group
  • a fluorine-based additive reactive monomer / oligomer having a fluorine group
  • a resin having a silicone group or a fluorine group a surfactant
  • One or more selected from the group consisting of oil can be used.
  • a photoinitiator may be further included in the hard coating layer, and the photoinitiator may include benzyl ketals, benzoin ethers, acetophenone derivatives, ketoxime ethers, benzophenone, (amino) benzoate, and benzyl as photoinitiators for UV curing.
  • At least one free radical initiator selected from dimethyl ketal compounds and at least one cationic initiator selected from onium salts, ferrocenium salts and diazonium salts, or the free radical initiator and the cation Sex initiator mixtures can be used.
  • the pencil hardness of the high hardness multilayer sheet may be about 4H or more.
  • Pencil hardness is the hardness of a certain material compared with the hardness of the pencil lead, it can be represented by the symbols such as H, F, B for each hardness and concentration.
  • Pencil hardness of the high hardness multilayer sheet is measured using ASTM D3363-05 (Mitsubishi pencil, 1kg load), by maintaining a hardness of about 4H or more can implement a superior hardness than a conventional multilayer sheet.
  • the plastic window material to which the high hardness multilayer sheet is applied is warped under high temperature and high humidity conditions, and the warp may cause problems in operation of the touch panel. Therefore, if a certain level of warpage occurs under high temperature and high humidity conditions, the window cover for the touch panel cannot be applied.
  • the curvature of the high hardness multilayer sheet may be about 0.1 mm after being left for 72 hours at a temperature of 85 ° C. and a humidity of 85%.
  • MMA methyl methacrylate
  • styrene 2 parts by weight of styrene, 15 parts by weight of N-cyclohexylmaleimide, 0.2 parts by weight of n-octyl mercaptan as a chain transfer agent and azobisiso-butyronitrile (AIBN as a polymerization initiator)
  • AIBN azobisiso-butyronitrile
  • PMMA-2 was prepared by the same method as PMMA-1 except for changing n-cyclohexylmaleimide to phenylmaleimide in the method for preparing PMMA-1.
  • the molecular weight of the PMMA-2 was 120,000 and the Tg was 133 ° C.
  • HP202 (LG MMA Co., Ltd.) having a molecular weight of 120,000 and a Tg of 104 ° C was used.
  • PC-1 polycarbonate copolymer
  • PC-2 Polycarbonate Copolymer
  • Phenolic antioxidant Irganox1010
  • UV stabilizer Hostavin B-CAP
  • Pencil Hardness The hardness of the Examples and Comparative Examples was measured using ASTM D3363-05 (Mitsubishi Pencil, 1 kg load).
  • Comparative Examples 1 to 4 have a higher hardness and excellent bending characteristics than Comparative Examples 1 to 4.
  • Comparative Examples 1 and 3 are PC layers containing a polycarbonate copolymer having a melt index of 22 or more
  • Comparative Examples 2 and 4 include a PMMA layer including an acrylic copolymer having a glass transition temperature of less than 130 ° C.
  • Example 1 to 4 which is a multilayered structure of a PMMA layer comprising an acrylic copolymer having a glass transition temperature of 130 ° C. to 140 ° C. and a PC layer including a polycarbonate copolymer having a melt index of 3 to 22. Compared with the hardness, the hardness and the bending property were also lower.
  • the thickness of the PC layer was set to 900um or less, and the bending property was lowered due to the relative increase in the thickness of the PMMA layer.
  • the thickness of the PMMA layer was set to 70um or more. Only the hardness is maintained, the bending property is reduced, it was confirmed that only the high hardness multilayer sheet of Examples 1 to 4 can implement the bending property and the scratch resistance at the same time.

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Abstract

La présente invention concerne une feuille multicouches à très haute dureté d'une structure multicouches de polycarbonate comprenant: une couche de méthalycrate de polyméthyle comprenant un copolymère acrylique formé de 75 parties en poids à 88 parties en poids de monomère ester d'acide (méth)acrylique, de 2 parties en poids à 5 parties en poids de monomère styrène et de 10 parties en poids à 20 parties en poids de monomère maléimide n-substitué; et un copolymère de polycarbonate.
PCT/KR2014/009543 2013-10-31 2014-10-10 Feuille multicouches à très haute dureté WO2015064928A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2016527358A JP6524077B2 (ja) 2013-10-31 2014-10-10 高硬度多層シート
CN201480058941.9A CN105705332B (zh) 2013-10-31 2014-10-10 高硬度多层片

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KR1020130130731A KR101800482B1 (ko) 2013-10-31 2013-10-31 고경도 다층시트
KR10-2013-0130731 2013-10-31

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KR (1) KR101800482B1 (fr)
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CN106079770A (zh) * 2016-05-12 2016-11-09 上海科比斯光学科技有限公司 一种复合树脂盖板及其制备方法、应用
JP2017531574A (ja) * 2014-09-30 2017-10-26 コーロン インダストリーズ インク 透明プラスチックシート
EP3616878A4 (fr) * 2017-04-28 2021-01-20 Kuraray Co., Ltd. Plaque de résine extrudée et son procédé de fabrication
CN115975366A (zh) * 2023-01-13 2023-04-18 佛山市达孚新材料有限公司 一种改性聚碳酸酯树脂及其制品和制备方法

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KR102029386B1 (ko) * 2015-10-29 2019-10-08 (주)엘지하우시스 내스크래치 특성이 우수한 데코 시트
KR102538093B1 (ko) 2016-06-28 2023-05-30 삼성디스플레이 주식회사 표시 장치
US20180236753A1 (en) * 2017-02-20 2018-08-23 Ford Global Technologies, Llc Vehicular polymeric glazing
KR102134808B1 (ko) * 2017-06-05 2020-07-17 사빅 글로벌 테크놀러지스 비.브이. 다층 폴리머 필름 및 이의 제조 방법
EP3680103A4 (fr) * 2017-09-06 2020-10-14 Mitsubishi Gas Chemical Company, Inc. Feuille de résine de moulage de haute dureté et article moulé l'utilisant
CN110157025B (zh) * 2018-02-12 2021-06-18 比亚迪股份有限公司 一种复合板材
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