WO2021132001A1 - Plaque de diffusion de lumière et unité de source de lumière de surface directe - Google Patents

Plaque de diffusion de lumière et unité de source de lumière de surface directe Download PDF

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Publication number
WO2021132001A1
WO2021132001A1 PCT/JP2020/047109 JP2020047109W WO2021132001A1 WO 2021132001 A1 WO2021132001 A1 WO 2021132001A1 JP 2020047109 W JP2020047109 W JP 2020047109W WO 2021132001 A1 WO2021132001 A1 WO 2021132001A1
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WIPO (PCT)
Prior art keywords
light diffusing
tert
antioxidant
phosphorus
butyl
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PCT/JP2020/047109
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English (en)
Japanese (ja)
Inventor
山口　泰生
佐藤　誠
Original Assignee
デンカ株式会社
東洋スチレン株式会社
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Application filed by デンカ株式会社, 東洋スチレン株式会社 filed Critical デンカ株式会社
Priority to MX2022005316A priority Critical patent/MX2022005316A/es
Priority to JP2021567354A priority patent/JPWO2021132001A1/ja
Priority to KR1020227025179A priority patent/KR20220118526A/ko
Priority to CN202080077557.9A priority patent/CN114730022A/zh
Publication of WO2021132001A1 publication Critical patent/WO2021132001A1/fr

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Classifications

    • 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
    • C08K5/04—Oxygen-containing compounds
    • C08K5/13—Phenols; Phenolates
    • 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
    • C08K5/49—Phosphorus-containing compounds
    • C08K5/51—Phosphorus bound to oxygen
    • C08K5/52—Phosphorus bound to oxygen only
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices

Definitions

  • the present invention relates to a light diffusing plate and a direct surface light source unit.
  • the light diffuser is used for a direct type liquid crystal display device or the like.
  • the direct type liquid crystal display device is a display device including a liquid crystal cell and a backlight device arranged directly under the liquid crystal cell.
  • An LED is used as a light source in the backlight device, and a light diffuser is arranged on the front side thereof. Things are being used.
  • the styrene-based resin composition may be used as a resin constituting the light diffusing plate (Patent Document 1).
  • LEDs used as light sources have become more powerful in order to respond to higher brightness, and due to an increase in calorific value and the like, long-term durability of conventional light diffusing plates made of styrene-based resin compositions has become insufficient. There is. In some cases, the strength did not meet the requirements.
  • the present invention has been made in view of such a problem, and is a light diffusing plate containing a styrene resin composition, and provides a light diffusing plate having excellent long-term durability and strength.
  • a light diffusing plate containing a styrene resin composition, wherein the styrene resin composition is a styrene resin (A), an antioxidant (B), and a light diffusing agent (C).
  • the antioxidant (B) is a phosphorus-based antioxidant (B-1), a phenol-based antioxidant (B-2), and a phosphorus-phenol-based antioxidant (B-3).
  • a total of 0.001 of the phosphorus-based antioxidant (B-1) and the phosphorus-phenol-based antioxidant (B-3) is added to 100 parts by mass of the styrene-based resin.
  • the light diffuser Provided is a light diffusing plate containing 0.1 to 10 parts by mass of C) and having a content of t-butyl catechol contained in the styrene resin composition of 0.1 to 10 ⁇ g / g.
  • the styrene resin composition contains t-butylcatechol, a phosphorus-based antioxidant, a phenol-based antioxidant, a phosphorus-phenol-based antioxidant, and a light diffusing agent. They have found that they are excellent in long-term durability and strength when the amount is within a predetermined range, and have completed the present invention.
  • the phosphorus-based antioxidant (B-1) is 2,2'-methylenebis (4,6-di-tert-butyl-1-phenyloxy) (2-ethylhexyloxy) phosphorus, tris (2,).
  • the phenolic antioxidant (B-2) is 6- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-.
  • the phosphorus-phenolic antioxidant (B-3) is 6- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-.
  • a light diffusing plate which is tetra-tert-butyldibenzo [d, f] [1,3,2] dioxaphosphepine.
  • the light diffusing agent (C) is at least one selected from acrylic polymer crosslinked particles, styrene polymer crosslinked particles, and siloxane polymer crosslinked particles.
  • the styrene resin (A) has a weight average molecular weight (Mw) of 200,000 to 400,000, and a ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of 1.0 to Mn.
  • a light diffuser that is 3.0.
  • the light diffusing plate for the LED light source of the light diffusing plate Preferably, a direct type surface light source unit having the above-mentioned light diffusing plate.
  • the light diffusing plate according to the embodiment of the present invention is a light diffusing plate containing a styrene resin composition.
  • the thickness of the light diffusing plate is not limited, but is, for example, 1 to 3 mm.
  • the light diffusing plate may be laminated with an ultraviolet absorbing layer containing an ultraviolet absorber or a light stabilizer.
  • An antistatic agent may be applied to the surface of the light diffusing plate according to the embodiment.
  • the antistatic agent By applying the antistatic agent, after the light diffusing plate is attached to the backlight device, the adhesion of dust and the like due to static electricity is suppressed, so that the light diffusing plate can be used for a long period of time without a decrease in brightness.
  • the light diffusing plate of the present invention may have fine uneven shapes such as embossing formed on both sides or directions thereof, or a semicircular or elliptical lens shape or a prism shape on both sides or one side. May be formed.
  • the styrene-based resin composition contains a styrene-based resin (A), a based antioxidant (B), and a light diffusing agent (C).
  • the content of t-butylcatechol contained in the styrene resin composition is 0.1 to 10 ⁇ g / g. Within such a range, long-term durability and strength are excellent. Specifically, the content of t-butylcatechol is 0.1,0.5,1,1.5,2,2.5,3,4,5,6,7,8,9,10 ⁇ g / It is g, and may be within the range between any two of the numerical values exemplified here.
  • t-butylcatechol If the content of t-butylcatechol is less than 0.1 ⁇ g / g, the effect of suppressing oxidative deterioration during thermoforming is small, so that the strength of the light diffusing plate is reduced and the content of t-butylcatechol is 10 ⁇ g / g. If it exceeds, t-butylcatechol itself becomes a coloring component, and not only the long-term durability of the light diffusing plate is lowered, but also the strength is lowered.
  • the styrene-based resin (A) is a resin obtained by polymerizing a styrene-based monomer as a main component, and specifically, a resin containing a styrene-based monomer in an amount of more than 50%.
  • the styrene-based monomer is a single aromatic styrene-based monomer such as styrene, ⁇ -methylstyrene, o-methylstyrene, p-methylstyrene, m-methylstyrene, ethylstyrene, and pt-butylstyrene.
  • the styrene-based resin (A) may be a copolymer obtained by copolymerizing a monomer copolymerizable with the styrene-based monomer with the styrene-based monomer, and may be copolymerized with the styrene-based monomer.
  • Possible monomers include, for example, an acrylic acid monomer such as acrylate and methacrylic acid, a vinyl cyanide monomer such as acrylonitrile and methacrylnitrile, and an acrylic type such as butyl acrylate, ethyl acrylate, methyl acrylate and methyl methacrylate.
  • Examples thereof include monomers, ⁇ , ⁇ -ethylene unsaturated carboxylic acids such as maleic anhydride and fumaric acid, and imide-based monomers such as phenylmaleimide and cyclohexylmaleimide. These monomers may be used alone or in combination of two or more.
  • the weight average molecular weight (Mw) of the styrene resin (A) is preferably 200,000 to 400,000, more preferably 200,000 to 290,000.
  • the ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) of the styrene resin (A) is preferably 1.0 to 3.0, more preferably 1.5 to. It is 2.5.
  • the ratio (Mz / Mw) of the Z average molecular weight (Mz) and the weight average molecular weight (Mw) of the styrene resin (A) is preferably 1.0 to 2.0. Within such a range, both moldability and strength of the light diffusing plate can be achieved.
  • the weight average molecular weight (Mw) When the weight average molecular weight (Mw) is 200,000 or more, the strength is good, and when it is 400,000 or less, the moldability is good. Further, when the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is 1.0 or more, the moldability is good, and when it is 3.0 or less, the strength is good. When the ratio (Mz / Mw) of the Z average molecular weight (Mz) to the weight average molecular weight (Mw) is 1.0 or more, the moldability is good, and when it is 2.0 or less, the strength is good.
  • the antioxidant (B) contains at least one of a phosphorus-based antioxidant (B-1), a phenol-based antioxidant (B-2), and a phosphorus-phenolic antioxidant (B-3).
  • the styrene-based resin composition contains a total of 0.001 to 0.5 of a phosphorus-based antioxidant (B-1) and a phosphorus-phenol-based antioxidant (B-3) with respect to 100 parts by mass of the styrene-based resin. It is contained in parts by mass, preferably 0.05 to 0.3 parts by mass. Within such a range, the light diffusing plate is excellent in long-term durability and strength.
  • the total content of the phosphorus-based antioxidant (B-1) and the phosphorus-phenolic antioxidant (B-3) is 0.001,0 with respect to 100 parts by mass of the styrene-based resin. .005,0.01,0.02,0.03,0.04,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4 , 0.45, 0.5 parts by mass, and may be within the range between any two of the numerical values exemplified here.
  • a total of 0.001 to 0.5 parts by mass of a phenolic antioxidant (B-2) and a phosphorus / phenolic antioxidant (B-3) is contained, preferably 0.02 to 0.3 parts by mass. It is more preferably contained in an amount of 0.05 to 0.15 parts by mass. Within such a range, the light diffusing plate is excellent in long-term durability and strength.
  • the total content of the phenolic antioxidant (B-2) and the phosphorus / phenolic antioxidant (B-3) is 0.001,0 with respect to 100 parts by mass of the styrene resin. .005,0.01,0.02,0.03,0.04,0.05,0.1,0.15,0.2,0.25,0.3,0.35,0.4 , 0.45, 0.5 parts by mass, and may be within the range between any two of the numerical values exemplified here.
  • the phosphorus-based antioxidant (B-1) is a (sub) phosphoric acid ester having no phenolic hydroxyl group in the basic skeleton, and is preferably a trivalent phosphorus compound, a phosphite ester.
  • Phenyl antioxidants (B-1) include, for example, 2,2'-methylenebis (4,6-di-tert-butyl-1-phenyloxy) (2-ethylhexyloxy) phosphorus, tris (2,4-).
  • Di-tert-butylphenyl) phosphite 3,9-bis (2,6-di-tert-butyl-4-methylphenoxy) -2,4,8,10-tetraoxa-3,9-diphosphaspiro [5, 5]
  • Undecane tetrakis (2,4-di-tert-butylphenyl) [1,1 biphenyl] -4,4'diylbisphosphonite, bis (2,4-di-tert-butyl-6-methylphenyl) At least one selected from ethyl phosphite and the like.
  • Phenolic antioxidant (B-2) is an antioxidant that has a phenolic hydroxyl group in its basic skeleton and is not a (sub) phosphate ester.
  • Phenolic antioxidants (B-2) include, for example, octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate and ethylenebis (oxyethylene) bis [3- (5-tert).
  • Phosphite-phenolic antioxidants are (sub) phosphoric acid esters having a phenolic hydroxyl group in the basic skeleton, and preferably a trivalent phosphorus compound having a phenolic hydroxyl group in the basic skeleton. Phosphite esters. Phosphorus-phenolic antioxidant (B-3) is 6- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propoxy] -2,4,8,10-tetra-tert- Butyldibenzo [d, f] [1,3,2] dioxaphosphepine and the like.
  • the styrene resin composition contains 0.1 to 10 parts by mass, preferably 0.5 to 3 parts by mass, and more preferably 0.8 of the light diffusing agent (C) with respect to 100 parts by mass of the styrene resin. Includes up to 1.5 parts by mass. Within such a range, the light diffusing plate is excellent in long-term durability and strength.
  • the content of the light diffusing agent (C) is 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, with respect to 100 parts by mass of the styrene resin. 0.7, 0.8, 0.9, 1.0, 1.5, 2, 3, 4, 5, 6, 7, 8, 9, 10 parts by mass, and any of the numerical values exemplified here. It may be within the range between the two.
  • the light diffusing agent (C) can be used as long as it is particles having a refractive index different from that of the styrene resin composition and has an effect of diffusing incident light.
  • styrene polymer crosslinked particles can be used.
  • Use organic particles such as acrylic polymer crosslinked particles and siloxane polymer crosslinked particles, and inorganic particles such as glass beads, silica particles, aluminum hydroxide particles, calcium carbonate particles, barium sulfate particles, titanium oxide particles, and talc.
  • glass beads, silica particles, aluminum hydroxide particles, calcium carbonate particles, barium sulfate particles, titanium oxide particles, and talc can be done.
  • at least one selected from acrylic polymer crosslinked particles, styrene polymer crosslinked particles, and siloxane polymer crosslinked particles is preferable.
  • the average particle size of the light diffusing agent (C) is preferably 1 to 20 ⁇ m. If the average particle size of the light diffusing agent (C) is less than 1 ⁇ m, the hue may deteriorate, and if it exceeds 20 ⁇ m, the light diffusing property may not be sufficiently imparted.
  • the type of additive is not particularly limited as long as it is generally used for plastics, but it is a flame retardant, a lubricant, a processing aid, an antiblocking agent, an antistatic agent, an antifogging agent, a light resistance improver, and a softening agent.
  • the styrene-based resin composition of the present invention can be manufactured by adding an antioxidant (B) and a light diffusing agent (C) to a styrene resin (A). Is.
  • the antioxidant (B) and the light diffusing agent (C) may be added at the time of polymerization of the styrene resin (A), or after the styrene resin (A) is polymerized, the antioxidant (B) and the antioxidant (B) may be added.
  • the light diffusing agent (C) may be dry-blended and melt-kneaded with an extruder to produce the product.
  • a pellet-shaped masterbatch obtained by melting and kneading the antioxidant (B) and the light diffusing agent (C) together with a small amount of styrene resin in advance was prepared, and the styrene resin (A) and the masterbatch were prepared. And may be dry-blended and then melt-kneaded for adjustment.
  • Examples of the polymerization method of the styrene resin include known styrene polymerization methods such as a massive polymerization method, a solution polymerization method, a suspension polymerization method, and an emulsion polymerization method. From the viewpoint of quality and productivity, the bulk polymerization method and the solution polymerization method are preferable, and continuous polymerization is preferable.
  • the solvent for example, alkylbenzenes such as benzene, toluene, ethylbenzene and xylene, ketones such as acetone and methyl ethyl ketone, and aliphatic hydrocarbons such as hexane and cyclohexane can be used.
  • a polymerization initiator When the styrene resin (A) is polymerized, a polymerization initiator, a chain transfer agent, a cross-linking agent and other polymerization aids, and other polymerization aids can be used, if necessary.
  • a radical polymerization initiator is preferable, and for example, 1,1-di (t-butylperoxy) cyclohexane, 2,2-di (t-butylperoxy) butane, 2,2-di (t-butylperoxy) butane, which are known and commonly used, are preferable.
  • Peroxyketals such as di (4,5-di-t-butylperoxycyclohexyl) propane, 1,1-di (t-amylperoxy) cyclohexane, cumenehydroperoxide, t-butylhydroperoxide and the like.
  • alkyl peroxides such as t-butylperoxyacetate, t-amylperoxyisononanoate, t-butylcumyl peroxide, di-t-butyl peroxide, dicumyl peroxide, di-t -Dialkyl peroxides such as hexyl peroxide, peroxyesters such as t-butyl peroxyacetate, t-butyl peroxybenzoate, t-butyl peroxyisopropyl monocarbonate, t-butyl peroxyisopropyl carbonate, polyether Peroxycarbonates such as tetrakis (t-butylperoxycarbonate), N, N'-azobis (cyclohexane-1-carbonitrile), N, N'-azobis (2-methylbutyronitrile), N, N' -Azobis (2,4-dimethylvaleronitrile), N, N'-azobis [2- (hydroxymethyl)
  • the styrene resin can be produced by a method including a polymerization step, a volatilization step, and a granulation step.
  • a known complete mixing tank type stirring tank, a tower reactor, or the like is used, and the polymerization reaction is controlled by adjusting the polymerization temperature or the like so as to obtain the target molecular weight, molecular weight distribution, and reaction conversion rate.
  • the polymerization solution containing the polymer that has left the polymerization step is transferred to the devolatile step, and the unreacted monomer and the polymerization solvent are removed.
  • the devolatilization process consists of a vacuum devolatilization tank with a heater and a devolatilization extruder with a vent.
  • the molten polymer that has left the devolatile step is transferred to the granulation step.
  • the molten resin is extruded into a strand shape from a porous die and processed into a pellet shape by a cold cut method, an aerial hot cut method, or an underwater hot cut method.
  • the content of t-butylcatechol in the styrene resin composition can be adjusted at the start of polymerization of the styrene resin (A) and in the subsequent devolatile step. Further, the styrene resin (A) may be adjusted by adding the styrene resin (A), the antioxidant (B), the light diffusing agent (C) and the like before and after the addition.
  • the light diffusing plate can be manufactured by molding a styrene resin composition by various methods such as extrusion molding and injection molding, but is preferably manufactured by extrusion molding.
  • extrusion molding is a method in which a styrene resin composition is melt-kneaded using a single-screw extruder or a twin-screw extruder, continuously extruded from a T die, and then cooled and solidified by a cooling roll unit. Be done.
  • an arbitrary uneven shape can be formed by providing a transfer mold on the surface of the cooling roll and changing the shape of the transfer mold.
  • a method such as a coextrusion method, a sticking method, a heat bonding method, a solvent bonding method, a casting method, or a surface coating method can be adopted.
  • the light diffusing plate according to the embodiment of the present invention can be used as a light diffusing plate for an LED light source.
  • the direct type surface light source unit according to the embodiment of the present invention is a direct type surface light source unit having the above-mentioned light diffusing plate.
  • ⁇ Vicat softening temperature> According to JIS K 7206, the measurement was performed at a heating rate of 50 ° C./hr and a test load of 50 N.
  • TBC t-butylcatechol
  • GC device Agilent 7890A
  • Column Agilent DB-5ms (0.25mm id x 30m) Liquid phase film thickness 0.25 ⁇ m
  • Injection port 300 ° C, 1.5 mL / min, (split ratio 1: 5)
  • MS device Agilent 5975C
  • Interface temperature 320 ° C
  • MS detection conditions SIM measurement TBC (quantitative m / z 295, confirmation m / z 310)
  • Total light transmittance, YI> Using a turbidity meter NDH5000 manufactured by Nippon Denshoku Kogyo Co., Ltd., the total light transmittance in the thickness direction of the light diffusing plate was measured in accordance with JIS-K7105.
  • the YI of the light diffusing plate was measured by the reflection method using a colorimetric chromaticity meter NDJ4000 manufactured by Nippon Denshoku Kogyo Co., Ltd. in accordance with JIS-K7105.
  • the central part of the light diffusing plate is hollowed out in a square shape of 115 mm ⁇ 115 mm, and the hollowed out portion is used.
  • an evaluation test piece obtained by cutting out the light diffusing plate obtained in the comparative example to 115 mm ⁇ 115 mm or an evaluation test piece of 115 mm ⁇ 115 mm after the durability test is attached, and this is attached to the frame of the liquid crystal television after taking out. I put it on.
  • the light diffusing plate was cut into a square shape of 200 mm ⁇ 200 mm and used as an evaluation test piece. Using a ball weighing 16.6 g, a 50% fracture height was measured according to JIS K-7211 and evaluated according to the following criteria. ⁇ : 50% destruction height exceeds 40 cm ⁇ : 50% destruction height is 20 to 40 cm X: 50% destruction height is less than 20 cm
  • the polymerization initiator was added to the raw material solution at the inlet of the first reactor so as to have the addition concentration (concentration based on the mass with respect to the raw material styrene) shown in Table 1, and uniformly mixed.
  • the polymerization initiators listed in Table 1 are as follows.
  • Polymerization Initiator-1 2,2-di (4,5-t-butylperoxycyclohexyl) propane (Pertetra A manufactured by NOF CORPORATION was used)
  • Polymerization Initiator-2 1,1-di (t-Butyl Peroxy) Cyclohexane (Perhexa C manufactured by NOF CORPORATION was used)
  • a temperature gradient was applied along the flow direction, and the temperature was adjusted to the temperature shown in Table 1 at the intermediate portion and the outlet portion.
  • a solution containing the polymer continuously taken out from the third reactor was introduced into a vacuum devolatilization tank with a preheater composed of two stages in series, and the preheater was adjusted to the resin temperature shown in Table 1.
  • the strands are extruded into strands from a porous die, and the strands are cooled and cut by a cold cut method. It was pelletized.
  • PS-2 to PS-5 were also synthesized in the same manner as PS-1 except that the conditions were changed according to Table 1.
  • Example 1 0.2 parts by mass of phosphorus-based antioxidant (HP-10) and phosphorus-phenol with respect to 100 parts by mass of styrene resin (PS-1) containing t-butylcatechol (TBC) in the amount shown in Table 1.
  • PS-1 styrene resin
  • TBC t-butylcatechol
  • GP system antioxidant
  • MBX-8 1.0 part by mass of the light diffusing agent
  • a light diffusing plate having a width of 800 mm and a thickness of 2.0 mm was obtained by discharging with a 0 mm T-die at a T-die temperature of 245 to 250 ° C., cooling and solidifying with three vertical cooling rolls, and trimming the end face.
  • the initial optical characteristics of the light diffusing plate were measured based on each measuring method, and the initial intensity was also measured.
  • the above durability test was performed, and the subsequent optical characteristics were measured based on each measuring method.
  • Examples 2 to 15 and Comparative Examples 1 to 7 were also measured by obtaining a resin composition / light diffusing plate in the same manner as in Example 1 except that the conditions were changed according to the conditions shown in Tables 2 and 3. .. The results are shown in Tables 2 and 3.
  • HP-10 2,2'-Methylenebis (4,6-di-tert-butyl-1-phenyloxy) (2-ethylhexyloxy) Phosphorus (manufactured by ADEKA; HP-10) 168: Tris (2,4-di-tert-butylphenyl) phosphite (manufactured by BASF Japan; Irgafos168) PEP-36: 3,9-bis (2,6-di-tert-butyl-4-methylphenoxy) -2,4,8,10-tetraoxa-3,9-diphosphaspiro [5.5] Undecane (ADEKA) Made; PEP-36) P-EPQ: Tetrakis (2,4-di-tert-butylphenyl) [1,1 biphenyl] -4,4'diylbisphosphonite (manufactured by BASF Japan; IrgafosP-

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne une plaque de diffusion de lumière qui contient une composition de résine de styrène, tout en ayant une excellente durabilité et résistance à long terme.　La présente invention concerne une plaque de diffusion de lumière qui contient une composition de résine de styrène, la composition de résine de styrène contenant une résine de styrène (A), un antioxydant (B) et un agent de diffusion de lumière (C) ; l'antioxydant (B) contient au moins l'un d'un antioxydant de phosphore (B-1), d'un antioxydant phénolique (B-2) et d'un antioxydant de phosphore/phénolique (B-3) ; par rapport à 100 parties en masse de la résine de styrène, un total de 0,001 à 0,5 partie en masse de l'antioxydant de phosphore (B-1) et l'antioxydant de phosphore/phénolique (B-3), un total de 0,001 à 0,5 partie en masse de l'antioxydant phénolique (B-2) et l'antioxydant de phosphore/phénolique (B-3) et de 0,1 à 10 parties en masse de l'agent de diffusion de lumière (C) sont contenus ; et la teneur en t-butyl catéchol contenue dans la composition de résine de styrène est de 0,1 à 10 μg/g.
PCT/JP2020/047109 2019-12-24 2020-12-17 Plaque de diffusion de lumière et unité de source de lumière de surface directe WO2021132001A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
MX2022005316A MX2022005316A (es) 2019-12-24 2020-12-17 Placa de difusion de luz y unidad de fuente de luz de superficie directa.
JP2021567354A JPWO2021132001A1 (fr) 2019-12-24 2020-12-17
KR1020227025179A KR20220118526A (ko) 2019-12-24 2020-12-17 광확산판 및 직하형 면광원 유닛
CN202080077557.9A CN114730022A (zh) 2019-12-24 2020-12-17 光扩散板以及直下式面光源单元

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JP2019-232946 2019-12-24
JP2019232946 2019-12-24

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KR (1) KR20220118526A (fr)
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MX (1) MX2022005316A (fr)
TW (1) TW202132822A (fr)
WO (1) WO2021132001A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006299192A (ja) * 2005-04-25 2006-11-02 Asahi Kasei Chemicals Corp シリコーン系粒子含有スチレン系樹脂組成物
JP2006299191A (ja) * 2005-04-25 2006-11-02 Asahi Kasei Chemicals Corp アクリル系樹脂粒子含有スチレン系樹脂組成物
JP2009215476A (ja) * 2008-03-12 2009-09-24 Toyo Styrene Co Ltd 光拡散板用スチレン系樹脂組成物及びその製造方法
WO2010071152A1 (fr) * 2008-12-17 2010-06-24 電気化学工業株式会社 Objet moulé pour applications optiques, et plaque guide de lumière et diffuseur comprenant l'objet
WO2016129675A1 (fr) * 2015-02-12 2016-08-18 デンカ株式会社 Composition de résine optique à base de styrène
WO2017094748A1 (fr) * 2015-11-30 2017-06-08 デンカ株式会社 Copolymère styrénique transparent hautement résistant à la chaleur

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4890766B2 (ja) * 2005-01-28 2012-03-07 帝人化成株式会社 光拡散性芳香族ポリカーボネート樹脂組成物
JP4837981B2 (ja) * 2005-11-18 2011-12-14 住化スタイロンポリカーボネート株式会社 光拡散性に優れた熱可塑性樹脂組成物およびそれからなる光拡散板
CN101679734A (zh) * 2007-06-28 2010-03-24 住友Dow株式会社 光漫射热塑性树脂组合物及其光漫射片
WO2009034861A1 (fr) * 2007-09-11 2009-03-19 Dic Corporation Composition de résine pour plaque de diffusion de lumière, plaque de diffusion de lumière et son procédé de fabrication
KR20110084287A (ko) 2008-11-06 2011-07-21 수미토모 케미칼 컴퍼니 리미티드 광확산판 및 그의 용도
KR101981561B1 (ko) * 2015-03-26 2019-05-23 스미카 폴리카르보네이트 가부시키가이샤 폴리카르보네이트 수지 조성물 및 광학용 성형품

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006299192A (ja) * 2005-04-25 2006-11-02 Asahi Kasei Chemicals Corp シリコーン系粒子含有スチレン系樹脂組成物
JP2006299191A (ja) * 2005-04-25 2006-11-02 Asahi Kasei Chemicals Corp アクリル系樹脂粒子含有スチレン系樹脂組成物
JP2009215476A (ja) * 2008-03-12 2009-09-24 Toyo Styrene Co Ltd 光拡散板用スチレン系樹脂組成物及びその製造方法
WO2010071152A1 (fr) * 2008-12-17 2010-06-24 電気化学工業株式会社 Objet moulé pour applications optiques, et plaque guide de lumière et diffuseur comprenant l'objet
WO2016129675A1 (fr) * 2015-02-12 2016-08-18 デンカ株式会社 Composition de résine optique à base de styrène
WO2017094748A1 (fr) * 2015-11-30 2017-06-08 デンカ株式会社 Copolymère styrénique transparent hautement résistant à la chaleur

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MX2022005316A (es) 2022-05-26
CN114730022A (zh) 2022-07-08
JPWO2021132001A1 (fr) 2021-07-01
TW202132822A (zh) 2021-09-01

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