WO2008010552A1 - Composition de résine du styrène et corps moulé - Google Patents

Composition de résine du styrène et corps moulé Download PDF

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Publication number
WO2008010552A1
WO2008010552A1 PCT/JP2007/064267 JP2007064267W WO2008010552A1 WO 2008010552 A1 WO2008010552 A1 WO 2008010552A1 JP 2007064267 W JP2007064267 W JP 2007064267W WO 2008010552 A1 WO2008010552 A1 WO 2008010552A1
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Prior art keywords
mass
parts
component
compound
styrene
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PCT/JP2007/064267
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English (en)
Japanese (ja)
Inventor
Shintaro Watanabe
Takeshi Yamada
Jun Takahashi
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Denki Kagaku Kogyo Kabushiki Kaisha
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Priority to JP2008525902A priority Critical patent/JPWO2008010552A1/ja
Publication of WO2008010552A1 publication Critical patent/WO2008010552A1/fr

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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, 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 an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, 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 an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/08—Copolymers of styrene
    • C08L25/14—Copolymers of styrene with unsaturated esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/22—Mixtures comprising a continuous polymer matrix in which are dispersed crosslinked particles of another polymer
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
    • C08L83/04—Polysiloxanes

Definitions

  • the present invention relates to a multilayer sheet excellent in light diffusibility, dimensional stability, light resistance, and antistatic properties.
  • the present invention relates to a light diffusing sheet used as a light diffusing plate for a transmissive screen of a screen such as a projection television or a liquid crystal television.
  • a screen lens such as a transmissive screen used in projection televisions projects an image on the screen and displays the image. Since this screen lens is desired to be bright and have a wide viewing angle for the observer, it generally has a configuration in which a lens molding such as a lenticular lens or a Fresnel lens is combined!
  • a lens molding such as a lenticular lens or a Fresnel lens is combined!
  • methacrylic resins having excellent transparency, light resistance, scratch resistance, molding processability, etc. are widely used.
  • These molded bodies are produced by press molding, extrusion molding, cast molding, injection molding, etc. Generally molded.
  • Patent Document 1 describes a mixture of an aromatic butyl monomer, a (meth) acrylic acid ester monomer, and a polyfunctional unsaturated monomer.
  • a method for obtaining a Fresnel lens by dissolving and polymerizing a styrene-gen copolymer is disclosed.
  • this technique is insufficient to obtain a molded article for a screen lens having an excellent light diffusibility.
  • methacrylic resin used as a base material for the light diffusing plate of liquid crystal televisions has a high water absorption rate, which causes a change in the dimensions of the light diffusing plate molding, warping of the light diffusing plate, It had a problem that its characteristics were impaired. Also, if the image or lamp light is irradiated for a long time, Discoloration occurred due to deterioration of the resin used for the lean lens and the light diffusion plate, and the image was discolored.
  • Patent Document 1 Japanese Patent Laid-Open No. 5-341101
  • An object of the present invention is to use a multilayer sheet excellent in dimensional stability, light resistance, light diffusibility and antistatic property, particularly as a light diffusion sheet such as a molded product for a screen lens or a molded product for a light diffusion plate. Is to provide a multilayer sheet.
  • a resin composition containing a compound as an intermediate layer, a copolymer mainly composed of a styrene monomer unit and a (meth) acrylate ester monomer unit, a specific unmelted compound and a specific compound It has been found that a multilayer sheet excellent in dimensional stability, light resistance, light diffusibility, and antistatic property can be obtained by using a resin composition containing a light resistance agent as a front layer and a back layer, and the present invention has been achieved. It is a thing.
  • the present invention has the following gist.
  • a light diffusing sheet having a multilayer structure wherein the surface layer a and the back layer c are composed of the following component (A), and the intermediate layer b is composed of the component (B).
  • the difference in refractive index from the copolymer is within 0.005, the average particle size is 5 to; 15 m of unmelted compound;! To 10 parts by mass, and the hindered amine compound is 0.;
  • component (A) is a cross-linked copolymer containing a styrene monomer and a (meth) acrylate monomer as monomer units.
  • a multilayer sheet as described in 1.
  • the unmelted compound contained in the component (B) is a cross-linked polymer containing a (meth) acrylic acid ester monomer as a monomer unit, as described in (1) or (2) above Multi-layer sheet.
  • the thickness of the surface layer a and the back layer c is 0.005 to 0.5 mm, and the thickness of the intermediate layer is !! to 7 mm.
  • the multilayer sheet as described.
  • the light diffusion sheet obtained by the present invention is excellent in optical properties, dimensional stability, light resistance, and antistatic properties, and therefore can be suitably used for optical display applications.
  • styrenic monomer used in the present invention examples include styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, p-t-butylstyrene, and the like, and preferably styrene.
  • Examples of the (meth) acrylic acid ester monomer in the present invention include methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate, 2-methyl hexyl.
  • Examples include attalylate, 2-ethylhexyl acrylate, octinore acrylate. These may be used alone or in combination of two or more. Preference is given to methyl methacrylate, ethyl acetate or n-butyl methacrylate, or mixtures thereof.
  • the styrene copolymer in the component (A) used for the surface layer and the back layer of the present invention is 20 to 50% by mass, preferably 35 to 50% by mass, and a styrene monomer unit.
  • the styrene copolymer in the component (B) used in the intermediate layer of the present invention is a styrene monomer unit of 50 to; 100% by mass, preferably 70 to 100% by mass, and (meth) acrylic acid ester ether-based monomer unit 50 to 0 mass 0/0, preferably from 30 to 0 mass 0/0, consists. If the styrene monomer unit is less than 50% by mass, it may be deformed by moisture absorption.
  • the styrene copolymer in the component (B) used in the intermediate layer of the present invention can be copolymerized with these in addition to the styrene monomer and the (meth) acrylate monomer.
  • the amount of the bulle monomer that may be copolymerized is preferably 10 parts by mass or less with respect to 100 parts by mass of the total amount of the styrene monomer and the (meth) acrylate monomer.
  • copolymerizable bur monomer examples include cyanated butyl monomers such as acrylonitrile and methacrylonitrile; methacrylic acid, acrylic acid, maleic anhydride, maleic acid, itaconic acid, hydrous itaconic acid Unsaturated carboxylic acid monomers such as maleimide, maleimide monomers such as N-methylmaleimide, N-phenylmaleimide and the like. These may be used alone or in combination of two or more.
  • the unmelted compound in component (A) has a melting point or softness above 200 ° C under an atmosphere of 1 atm. Compounds having a conversion point are preferred. When the melting point and softening point are less than 200 ° C, when the compound is melted and kneaded with a styrenic copolymer or when a styrenic resin composition is formed into a sheet, the compound does not readily retain excellent optical properties. There is.
  • the refractive index difference between the styrene copolymer and the unmelted compound in the component (A) is within 0.005, preferably within 0.003. When the difference in refractive index exceeds 0.005, the total light transmittance and light diffusivity decrease.
  • the average particle size of the unmelted compound is !!-15 m, preferably 5-14 m.
  • the average particle size of the unmelted compound is a value obtained by measurement using a Coulter Multisizer (manufactured by Beckman Coulter). The measurement is performed by the laser diffraction light scattering method, water is used as the solvent, the sample is dispersed for 1 minute using a homogenizer with an output of 200 W, and the concentration of PIDS (Polarization Intensity Differential Scattering) is 45-55%. The water refractive index was measured at 1.33, and the average particle diameter was calculated from the volume distribution.
  • the unmelted compound is contained in an amount of! To 10 parts by mass, preferably 2 to 9 parts by mass with respect to 100 parts by mass of the styrene copolymer in the component (A). If the content of the unmelted compound is less than 1 part by mass, the haze and diffusivity become small and the light diffusibility decreases, and if it exceeds 10 parts by mass, the total light transmittance tends to decrease.
  • the unmelted compound in component (A) is not particularly limited, but a cross-linked copolymer containing a styrene monomer and a (meth) acrylic acid ester monomer as monomer units is used. preferable.
  • the styrene monomer is, for example, styrene, ⁇ -methylstyrene, ⁇ -methylstyrene, p-t-butylstyrene, or the like, and preferably styrene.
  • the (meth) acrylic acid ester-based monomer is, for example, methyl methacrylate, ethyl methacrylate, methyl acrylate, or the like, preferably methyl methacrylate.
  • the hindered amine compound and the benzotriazole compound strength are each less than 0.1 parts by mass, the light resistance is lowered, and when more than 2 parts by mass, the yellowness of the obtained light diffusion sheet is reduced. There is a tendency to become stronger.
  • Hindered amine compounds are amamine-based photostabilizers such as bis (2, 2, 6, 6-tetramethyl-1 (octyloxy) 4-piperidinyl) ester, bis (1, 2, 2) decanoate.
  • Benzotriazole compounds are ultraviolet absorbers such as 2- (2H-benzotriazole-2-yl) p cresol, 2- (2H-benzotriazole-2-yl).
  • component (A) contains 0.0;! To 3 parts by mass, preferably 0.;! To 2.5 parts by mass, with respect to 100 parts by mass of the styrene copolymer. It is necessary to contain an amine surfactant. If the amount of the amine-based surfactant is less than 0.01 parts by mass, the antistatic property may not be sufficient. If the amount exceeds 3 parts by mass, the resulting resin composition or molded article may be discolored.
  • amine surfactants include alkyl diethanolamine, polyoxyethylene alkylamine, alkyldiethanolamide, polyoxyethylene alkylamide, N hydroxyethyl N- (2-hydroxyalkyl) amine, and the like. Can be used alone or in combination of two or more.
  • At least one of the component (A) and the component (B) is preferably a benzoxazole-based compound which is a colorant and is a so-called optical brightener.
  • the content of the benzoxazole-based compound in at least one component is 0.0005 parts by mass or more, the yellowness of the resulting multilayer sheet is reduced and the appearance is improved as compared to less than 0.005 parts by mass.
  • the total light transmittance of the resulting multilayer sheet tends to increase, which is preferable.
  • the amount of 0.5 parts by mass or less is preferable because the light resistance of the resulting multilayer sheet is improved as compared with the case of exceeding 0.5 parts by mass.
  • benzoxazole-based compounds examples include 2,5-thiophenzyl (5-tert chinoleyl 1,3-benzoxazonole, 2,5-thiophenzinore (5-tert-butynole 1,5-benzoxazole 10 % And dicyclohexyl phthalate 90%, 4,4'-bis (benzoxazol 2-yl) stilbene, etc., which may be used alone or in combination. .
  • the unmelted compound used for component (B) is preferably a compound having a melting point or softening point at 200 ° C. or higher under an atmosphere of 1 atm.
  • the melting point and softening point are less than 200 ° C, the unmelted compound melts at the time of melt-kneading with the styrene-based copolymer or when the styrene-based resin composition is formed into a sheet, so that excellent optical characteristics can be maintained immediately. There are cases where it is not possible.
  • the difference in refractive index between the styrene copolymer and the unmelted compound in component (B) is 0.05 to 0.15, preferably 0.07 to 0.13.
  • the average particle diameter of the unmelted compound is 2 to 10111, preferably 3 to 9.
  • the average particle size of the unmelted compound is a value obtained by measurement using a Coulter Multisizer (Beckman Coulter, Inc.).
  • the measurement is performed by the laser diffraction light scattering method. Water is used as the solvent, and the sample is dispersed for 1 minute using a homogenizer with an output of 200 W, and the PIDS (Polarization Intensity Differential Scattering) concentration is adjusted to 45-55%. Adjustment, measurement was made with a water refractive index of 1.33, and the average particle diameter was calculated from the volumetric cloth.
  • PIDS Polyization Intensity Differential Scattering
  • the unmelted compound is based on 100 parts by mass of the styrene copolymer in the component (B); It is necessary to contain 10 parts by mass, preferably 2 to 9 parts by mass. When the content of unmelted compound is less than part by mass, the resulting light diffusion sheet has a low haze and light diffusibility, and when it exceeds 10 parts by mass, the total light transmittance decreases.
  • the unmelted compound in the component (B) is not particularly limited, but a cross-linked copolymer mainly composed of a (meth) acrylic acid ester monomer is preferable.
  • the (meth) acrylic acid ester-based monomer is, for example, methyl methacrylate, ethyl methacrylate, methyl acrylate, or the like, preferably methyl methacrylate.
  • the method for producing the styrene copolymer in component (A) and the styrene copolymer in component (B) is not particularly limited, but bulk polymerization, suspension polymerization, solution polymerization, emulsification A polymerization method can be suitably employed.
  • each material of component (A) and component (B) there are no particular restrictions on the blending method of each material of component (A) and component (B), a method of blending each styrene copolymer before, during, and immediately after polymerization, and a separated styrene copolymer. Examples include a method of blending with a polymer by melt mixing.
  • the mixing method is not particularly limited.
  • a known mixing apparatus such as a Henschel mixer or a tumbler mixer may be used. After the preliminary mixing, the mixture can be uniformly mixed by melt kneading using an extruder such as a single screw extruder or a twin screw extruder.
  • an extruder such as a single screw extruder or a twin screw extruder.
  • a high-concentration mixture in which an unmelted compound is mixed at a high concentration with a styrenic copolymer is prepared, and this high-concentration mixture and a styrene-based copolymer are dry blended during the manufacture of a light diffusion sheet.
  • a material in which the content of the unmelted compound becomes a specified concentration may be used as a raw material.
  • An additive may be blended with the styrenic copolymer in the component (A) and the styrenic copolymer in the component (B), if necessary.
  • plasticizers, lubricants, silicone oils and the like can be blended to improve fluidity and releasability.
  • a heat stabilizer can be blended in order to impart further heat stability.
  • a colorant can be added.
  • the light diffusing sheet of the present invention has a multilayer structure, and the thickness of each layer is such that the surface layer a and the back layer c comprising the component (A) are 0.005 to 0.5 mm, preferably 0.03. 0.2mm, (B) component
  • the intermediate layer b which is also a force, is preferably! To 7 mm, more preferably 1.2 to 2.5 mm. If the surface layer a and the back layer c are less than 0.005 mm, the resulting light diffusion sheet may be discolored by light irradiation, and if it exceeds 0.5 mm, it may be deformed by moisture absorption. Also, if the intermediate layer b is less than lmm or more than 7mm, excellent optical characteristics may not be obtained.
  • the light diffusing sheet may be a sheet obtained by extruding the surface layer a, the intermediate layer b, and the back layer c separately by heat fusion or the like, and a T-die using a feed block. Alternatively, extrusion may be performed simultaneously using a multi-hold die.
  • the power of the latter method is not only economically advantageous, but it is also advantageous in terms of quality, if it is easy to prevent scratches and foreign matter from entering the sheet surface during lamination.
  • the tanks used for the production were the first and second devolatilization tanks, each of which has a first complete mixing tank with a capacity of about 5L and a second complete mixing tank with a capacity of about 15L connected directly to IJ and equipped with a preheater. Two units were connected in series.
  • styrene 10 parts by mass 0/0 with respect to the monomer solution 10 0 parts by mass composed of methyl methacrylate Tari rate 90 mass%, Echirubenzen 15 parts by weight, t-butyl peroxide O carboxymethyl isopropyl monocarbonate 0.01 parts by weight of 2 , 4 Diphenyl nitro 4 Methyl-1-pentene 0.2 parts by mass was mixed to prepare a raw material solution.
  • This raw material solution was supplied to the first complete mixing tank controlled at 135 ° C at 6. Okg per hour.
  • the conversion rate at the outlet of the first complete mixing tank was 28% by mass.
  • the conversion rate at the outlet of the second complete mixing tank was 63%.
  • Styrene 40 wt 0/0 except for using a monomer solution composed of methyl methacrylate Tari rate 60 mass 0/0, (A- 1) and was conducted in the same manner, a styrene-based copolymer (A -2) was obtained.
  • Styrene 80 wt 0/0 except for using a monomer solution composed of methyl methacrylate Tari rate 20 mass%, was carried out in the same manner as (A- 1), a styrene-based copolymer (A-3 )
  • polyorganosiloxane cross-linked beads (average particle diameter 6 m, refractive index 1.420, Toshiba Silicone Tospearl 2000B) were used.
  • a crosslinked bead (D-2) having an average particle diameter of 3111 and a refractive index of 1.535 was obtained by the same production method as (D-1) except that 1.0 part by mass of tribasic calcium phosphate was used.
  • a crosslinked bead (D-4) having an average particle diameter of 18 m and a refractive index of 1.535 was obtained by the same production method as (D-1) except that 0.1 part by mass of tricalcium phosphate was used.
  • a crosslinked bead (E-2) having an average particle diameter of 1111, and a refractive index of 1.494 was obtained by the same production method as (E-1) except that 1.5 parts by mass of tribasic calcium phosphate was used.
  • a crosslinked bead (E-3) having an average particle diameter of 3111 and a refractive index of 1.494 was obtained by the same production method as (E-1) except that 1.0 part by mass of tricalcium phosphate was used.
  • a crosslinked bead (E-4) having an average particle diameter of 13 m and a refractive index of 1.494 was obtained by the same production method as (E-1) except that 0.2 part by mass of tricalcium phosphate was used.
  • fluorescent whitening agent 2 5-thiophenzyl (5-tert-butyl-1,3-benzoxazole) (Ciba Specialty Chemicals' Ubitex OB) (F-l), resin colorant Mitsubishi Chemical Dairesin BLUE J (F-2) manufactured by Daikin was used.
  • a light diffusion sheet having a three-layer structure shown in Tables 4 to 8 was prepared using a T-die type multilayer extruder having a feed block.
  • the multi-layer extruder consists of a single 65mm ⁇ full flight screw single screw extruder for the intermediate layer and a single 30mm m ⁇ full flight screw single screw extruder for the front and back layers.
  • a test extruder was used in which the feed blocks were joined and multilayered. Each cylinder temperature for sheeting was operated and molded at 230 ° C.
  • the haze is 99% or more, the total light transmittance is 65% or more, the diffusivity is 17% or more, the b value indicating yellowness is less than ⁇ , and the light resistance is less than the color difference ⁇ value, it can be judged that the optical characteristics are good. .
  • the water absorption warpage must be less than 1 mm, and in order to exhibit excellent antistatic properties, the surface resistivity must be 10 12 ⁇ or less.
  • Each measuring method of the obtained light diffusion sheet is as follows.
  • L, a, b are hues before light resistance evaluation
  • L ′, a ′, b ′ are hues after light resistance evaluation (after 400Hr irradiation).
  • Antistatic property The surface resistivity of the molded product, which was conditioned for 24 hours at a temperature of 23 ° C and humidity of 50% RH in accordance with JIS K-6911, was measured using a surface resistivity measuring machine manufactured by KAWAGUCHI (R503 ) And this value was taken as a measure of antistatic properties.
  • Refractive index The unmelted compound was measured with an Abbe refractometer in an atmosphere having a wavelength of 589 nm and 23 ° C.
  • the styrene copolymer was measured at a temperature of 25 ° C. using a digital refractometer (RX-2000, manufactured by ATAGO) using a saturated aqueous solution of potassium iodide as a contact liquid.
  • Resin composition of styrene copolymer Dissolve styrene copolymer in deuterated form to prepare 2% solution and use FT-NMR (FX-90Q type, manufactured by JEOL Ltd.) as measurement data. was measured using C and calculated from the peak areas of styrene and methyl methacrylate.
  • the multilayer sheet of the present invention is excellent in dimensional stability, light resistance, light diffusibility, and antistatic properties, and is particularly useful as a transmissive screen for screens such as projection televisions and a light diffusing plate for liquid crystal televisions. It should be noted that the entire contents of the specification, claims, and abstract of Japanese Patent Application No. 2006-196541 filed on July 19, 2006 are cited herein as the disclosure of the specification of the present invention. Incorporate.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

L'invention concerne une feuille diffusant la lumière excellente en termes de stabilité des dimensions, de résistance à la lumière, de caractéristiques optiques et de propriétés antistatiques. L'invention concerne précisément une feuille multicouche excellente en termes de stabilité des dimensions, de résistance à la lumière, de diffusion de la lumière et de propriétés antistatiques, comprenant : une couche intermédiaire constituée d'une composition de résine contenant un copolymère principalement composé de 50-100 % en masse d'une unité monomère du styrène et de 50-0 % en masse d'une unité monomère de l'acide (méth)acrylique et un composé non fondu spécifique ; et des couches de devant et de derrière constituées d'une composition de résine contenant un copolymère principalement composé de 20-50 % en masse d'une unité monomère du styrène et de 80-50 % en masse d'une unité monomère d'ester de type (méth)acrylate, un composé non fondu spécifique et un agent résistant à la lumière spécifique.
PCT/JP2007/064267 2006-07-19 2007-07-19 Composition de résine du styrène et corps moulé WO2008010552A1 (fr)

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JP2008525902A JPWO2008010552A1 (ja) 2006-07-19 2007-07-19 スチレン系樹脂組成物及び成形体

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JP2006-196541 2006-07-19
JP2006196541 2006-07-19

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WO2008010552A1 true WO2008010552A1 (fr) 2008-01-24

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KR (1) KR20090031426A (fr)
CN (1) CN101489785A (fr)
TW (1) TWI391244B (fr)
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WO2013157530A1 (fr) * 2012-04-17 2013-10-24 三菱瓦斯化学株式会社 Stratifié
WO2024162461A1 (fr) * 2023-02-03 2024-08-08 東洋スチレン株式会社 Article moulé multicouche et plaque de diffusion de lumière

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WO2016129675A1 (fr) * 2015-02-12 2016-08-18 デンカ株式会社 Composition de résine optique à base de styrène
CN107828072A (zh) * 2017-11-07 2018-03-23 张永宏 扩散片

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JP4196154B2 (ja) * 2001-12-19 2008-12-17 三菱瓦斯化学株式会社 多層シート
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