WO2007020870A1 - Materiau de revetement pour feuille de diffusion de la lumiere et feuille de diffusion de la lumiere - Google Patents

Materiau de revetement pour feuille de diffusion de la lumiere et feuille de diffusion de la lumiere Download PDF

Info

Publication number
WO2007020870A1
WO2007020870A1 PCT/JP2006/315834 JP2006315834W WO2007020870A1 WO 2007020870 A1 WO2007020870 A1 WO 2007020870A1 JP 2006315834 W JP2006315834 W JP 2006315834W WO 2007020870 A1 WO2007020870 A1 WO 2007020870A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin particles
coating material
mass
meth
parts
Prior art date
Application number
PCT/JP2006/315834
Other languages
English (en)
Japanese (ja)
Inventor
Takuji Tsukamoto
Osamu Saitou
Shigetoshi Nishizawa
Original Assignee
Dainippon Ink And Chemicals, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dainippon Ink And Chemicals, Inc. filed Critical Dainippon Ink And Chemicals, Inc.
Publication of WO2007020870A1 publication Critical patent/WO2007020870A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0273—Diffusing elements; Afocal elements characterized by the use
    • G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles

Definitions

  • the present invention relates to a light diffusion sheet having a light diffusion layer comprising a coating material for a light diffusion sheet and a coating film of the coating material.
  • a light diffusion sheet has been used as a material for diffusing backlight light of a liquid crystal display and uniformly illuminating the entire surface of the liquid crystal display.
  • this light diffusion sheet has also been required to have high light and light diffusibility (high light and haze value). It was.
  • a light diffusion sheet there is known a light-diffusing sheet that is embossed on a surface of a transparent resin sheet to form irregularities and imparted light diffusibility.
  • a light diffusing sheet having a light diffusing layer comprising a coating film in which acrylic resin particles are dispersed as a light diffusing agent see, for example, Patent Documents 1 and 2). Since these acrylic resin particles have a relatively high light diffusivity, they are widely used as light diffusing agents. However, in order to obtain higher light diffusibility, it is necessary to increase the amount of the acrylic resin particles. There is.
  • Patent Document 3 JP-A-7-218705
  • Patent Document 2 JP-A-9 265004
  • Patent Document 3 JP 2001-201614
  • the problem to be solved by the present invention is that a hard cake is not produced, it is excellent in storage stability, high light diffusibility is obtained even with a small amount of a light diffusing agent, and the light diffusing layer has Provided is a light diffusing sheet coating material that provides a light diffusing sheet in which unevenness does not occur and the light diffusing layer has high scratch resistance, and a light diffusing sheet having a light diffusing layer comprising a coating film of the coating material. It is.
  • the present inventor has obtained a coating material for a light diffusing sheet in which an amorphous polycarbonate resin particle having an irregular shape is blended as a light diffusing agent in a binder resin. , Excellent storage stability without producing a hard cake, and when the coating material is used, high light diffusibility can be obtained even with a small amount of light diffusing agent, and no unevenness occurs in the light diffusing layer. It has been found that a light diffusing sheet having a high scratch resistance of the light diffusing layer can be obtained.
  • acrylic resin particles in addition to amorphous polycarbonate resin particles, acrylic resin particles
  • the first aspect of the present invention is a coating material for a light diffusing sheet containing a binder resin (A) and irregular-shaped polycarbonate resin particles (B).
  • the second aspect of the present invention is a coating material for a light diffusion sheet containing a binder resin (A), an amorphous polycarbonate resin particle (B), and an acrylic resin particle (C). Furthermore, the present invention provides a light diffusion sheet having a light diffusion layer composed of a coating film of these coating materials.
  • the coating material for a light diffusion sheet of the present invention does not produce a hard cake and is excellent in storage stability, and thus can be used even after long-term storage.
  • the light diffusing sheet using the coating material can obtain high light diffusibility even with a small amount of the light diffusing agent, the light diffusing layer is not uneven, and the light diffusing layer has scratch resistance. Since it is high, the light diffusing sheet can be manufactured with high yield.
  • the light diffusing sheet of the present invention has high light diffusibility, a liquid crystal display with higher image quality can be realized by using it for a light diffusing sheet for backlight of a liquid crystal display.
  • FIG. 1 is a photomicrograph of amorphous polycarbonate resin particles used in Examples.
  • FIG. 2 is a photomicrograph of acrylic resin particles used in Examples and Comparative Examples.
  • the binder resin (A) used in the present invention may be any resin that can form a coating film. Due to the difference in the method of forming the coating film, solvent evaporation drying type resin, thermosetting resin, active energy line Examples include curable resins. These binder resins can be formed into a coating film by evaporating and drying a solvent, curing by heating, curing by irradiating active energy rays such as ultraviolet rays, and the like. A resin having high transparency when it becomes a coating film is preferred. Among these resins, active energy ray curable resins are preferred because they can be cured quickly, so that light diffusing sheets can be obtained with high productivity.
  • the solvent evaporative drying resin is not particularly limited as long as it is a resin soluble in a solvent.
  • urethane resin, cellulose resin, acrylic resin, epoxy resin, polyester resin and the like can be mentioned. These solvent evaporation drying resins may be used alone or in combination of two or more.
  • thermosetting resin is not particularly limited as long as it is a resin curable by heating.
  • urethane resin epoxy resin, phenol resin, alkyd resin, unsaturated polyester resin, styrene-maleic acid resin, acrylic resin, melamine resin, urine
  • examples thereof include a base resin, an amino resin, a fluorine resin, and a silicone resin.
  • the active energy ray-curable resin is not particularly limited as long as it is a compound that can be cured by irradiation with active energy rays such as ultraviolet rays and electron beams. Examples thereof include urethane (meth) acrylate (A1), radical polymerizable monomer, epoxy (meth) acrylate, and the like. These active energy ray-curable resins may be used alone or in combination of two or more. In the present invention, “(meth) acrylate” refers to one or both of metatarate and phthalate.
  • the urethane (meth) acrylate (A1) is, for example, a method of reacting a polyol (al), a polyisocyanate (a2), and a compound (a3) having a polymerizable unsaturated group and a hydroxyl group at the terminal, Alternatively, it can be obtained by reacting polyisocyanate (a2) with a compound (a3) having a polymerizable unsaturated group and a hydroxyl group at the terminal.
  • the polyol (al) can be obtained by, for example, a polyester polyol obtained by polycondensation of a polybasic acid and a polyhydric alcohol; ring-opening polymerization of latatones such as ⁇ -force prolatatone and ⁇ -valerolatatane.
  • Polyester polyol Polyether polyol which is a polymer of cyclic ethers such as alkylene oxides such as ethylene oxide, propylene oxide and butylene oxide, tetrahydrofuran and alkyl-substituted tetrahydrofuran, or a copolymer of two or more of these; Bisphenol And alkylene oxide adduct of bisphenol and bisphenol.
  • isocyanurate-based polyols obtained by adding latones and alkylene oxides to triisocyanate, which is a trimer of diisocyanate described below.
  • Examples of the polyisocyanate compound (a2) include 2,4_tolylene diisocyanate, 2,6_tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate. , Hydrogenated 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 1,5-naphthalene diisocyanate , Tolidine diisocyanate, phenylene diisocyanate, transcyclohexane 1,4-diisocyanate, lysine diisocyanate, tetramethylxylene diisocyanate, lysine ester triisocyanate, 1, 6, 11—Undeccan Triisocyanate, 1,8-diisocyanate-4 isocyanate methyloctane, 1,3,6-hexamethylene
  • Examples of the compound (a3) having a polymerizable unsaturated group and a hydroxyl group at the terminal include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxy 1 3 Phenoxypropyl (meth) acrylate, 2- (meth) ateroyloxychetti _ 2-hydroxyethyl phthalate, pentaerythritol tri (meth) acrylate, 3-hydroxy, 2-hydroxy 1— (Meth) Atari Mouthoxy— 3— (Meth) Atalyloxy Propane, Glycerin Di (Meth) Atalylate, Polypropylene Glycol Mono (Meth) Atylate, Polyethylene Dallyol Mono (Meth) Atalylate, Poly ⁇ —Strength Prolater Tonmono (meth) acrylate, 4-hydroxybutyl (meth) acrylate, trihydroxyethyl isocyanine Toji (meth) Atarire bets,
  • urethane (meth) acrylates (A1) urethane (meth) acrylates having an isocyanurate ring are particularly preferable because they improve the scratch resistance of the light diffusion sheet.
  • urethane (meth) acrylates having an isocyanurate ring include urethane acrylates obtained by reacting triisocyanate, which is a trimer of hexamethylene diisocyanate, and 2-hydroxyethyl acrylate. .
  • radical polymerizable monomer any of a monofunctional polymerizable monomer, a bifunctional polymerizable monomer, and a polyfunctional polymerizable monomer can be used. These radical polymerizable monomers may be used alone or in combination of two or more.
  • Examples of the monofunctional polymerizable monomer include methoxyethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, ⁇ - (meth) attaroyloxychetyl hydrogen phthalate, ⁇ - (meth) Ataliloyloxetyl hydrogen succinate, noyulphenoxychetyl (meth) acrylate, noyulphenoxy polyoxy Ethylene (meth) acrylate, noelphenoxy polyoxypropylene (meth) acrylate,
  • bifunctional polymerizable monomer examples include 2, 2-dimethyl-3-hydroxypropinole 1, 2-dimethyl _ 3-hydroxypropionate di (meth) acrylate and ethylene glycol di (meth).
  • polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, 1, 4_butanediol di (meth) acrylate, 1, 6-hexane Diol di (meth) atrely Glycerin di (meth) acrylate, neopentyl glycol di (meth) acrylate, di (meth) acrylate of neopentyl glycol hydroxybivalate, di (meth) acrylate / bis bisphenol Propylene oxide of phenol A Adduct di (meth) acrylate, 2, 2'-di (hydroxypropoxyphenyl) propane di (meth) acrylate, 2, 2'-di (hydroxy)
  • Examples of the polyfunctional polymerizable monomer include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hex (meta).
  • Atarylate tetramethylol methane tri (meth) acrylate, tetramethylol methane tetra (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, tris (hydroxypropyl) isocyanurate Tri (meth) acrylate, tri (meth) acrylate of trimellitic acid, triallyl trimellitic acid, triallyl isocyanurate, and the like.
  • These polyfunctional polymerizable monomers may be used alone or in combination of two or more.
  • the above polyfunctional polymerizable monomers may be used alone or in combination of two or more.
  • it is preferable to use a polyfunctional polymerizable monomer because the coating film can be hardened compared to a monofunctional polymerizable monomer or a bifunctional polymerizable monomer, and the scratch resistance can be improved.
  • Examples of the epoxy (meth) acrylate include those obtained by adding (meth) acrylic acid to polyglycidyl ether obtained by reacting the polyol (al) and epichlorohydrin by a dehydrochlorination reaction. It is done.
  • a photopolymerization initiator is blended in a coating material for a light diffusion sheet.
  • the photopolymerization initiator can be roughly classified into an intramolecular cleavage type photopolymerization initiator and a hydrogen abstraction type photopolymerization initiator.
  • Examples of the intramolecular cleavage type photopolymerization initiator include diethoxyacetophenone, 2-hydroxy-1-2-methyl 1-phenylpropane-1-one, benzyl dimethyl ketal, 1_ (4-isopropylphenyl) _2-hydroxy 1_one, 1_one, 4_ (2-hydroxyethoxy) phenyl mono (2-hydroxy-2-phenyl) ketone, 1-hydroxycyclohexyl phenylketone, 2_methyl_2_morpholino (4 1- (1-thiomethylphenyl) propane-1-one, 2-benzyl_2-dimethylamino-1-acetophenone compounds such as 1- (4-morpholinophenyl) butanone; benzoins such as benzoin, benzoin methyl ether and benzoin isopropyl ether Compound; 2, 4, 6 _Trimethylbenzoyldiphenylphosphine oxide, bis (2, 4, 6 _ Rimechirube Nzoiru) ⁇ si
  • examples of the hydrogen abstraction type photopolymerization initiator include, for example, benzophenone, o-benzoyl methyl benzoate-4-phenylbenzophenone, 4,4'-dibenzo benzophenone, hydroxybenzophenone, 4 —Benzolinole 4′—Methyl-diphenylsulfide, benzylated benzophenone, 3, 3 ′, 4,4′—tetra (t-butylperoxycarbonyl) benzophenone, 3,3′—dimethylolene 4-methoxybenzophene Benzophenone compounds such as Non; 2 Isothioxanthone, 2, 4 Dimethylthioxanthone, 2, 4 Diethylthioxanthone, 2, 4 Dithioxanthone and other thixanthone compounds; Aminobenzophenone compounds such as: 1 0 Butyl 2 Chloroatalidone, 2 Ethyl And compounds such as anth
  • the amount of these photopolymerization initiators used is preferably 0.5 :! to 20 parts by mass with respect to 100 parts by mass of the active energy ray-curable resin, more preferably 0.5 to 10 parts by mass. .
  • the polycarbonate resin constituting the amorphous polycarbonate resin particles (B) used in the present invention is a polycarbonate obtained by reacting a divalent phenol and a carbonate precursor by an interfacial polycondensation method or a melt ester exchange method.
  • Polycarbonate resin and cyclic carbonate obtained by polymerizing resin and carbonate precursors by solid phase transesterification A polycarbonate resin obtained by polymerizing the compound by a ring-opening polymerization method.
  • a polycarbonate resin for example, a polycarbonate resin produced by an interfacial polycondensation method using 2,2-bis (4-hydroxyphenyl) propane (bisphenol A) as a divalent phenol and phosgene as a carbonate precursor is used. Can be mentioned.
  • the irregular-shaped polycarbonate resin particles (B) preferably have a number average molecular weight of 5,000 to: a force S after 100,000, a force S preferable, and a force after 7,500 to 75,000. More preferred is 10,000 to 50,000. When the number average molecular weight is within this range, the solvent resistance increases. In addition, polycarbonate resin particles having an aromatic ring are particularly preferable because they have high light diffusibility and excellent scratch resistance.
  • the shape of the polycarbonate resin particles (B) is indefinite.
  • the irregular shape means that the surface of the resin particle has irregularities, that is, the particle projection image has irregularities.
  • the particle projection image is an image obtained by viewing particles from one direction.
  • the irregular shapes those having a sphericity defined by the following formula in the range of 0.50-0.94 are preferable.
  • Circularity of particle projection image (circumference of circle with the same area as particle projection area) / (perimeter of particle projection image)
  • Average value of circularity of particle projection image sphericity of spherical particles
  • the sphericity of the amorphous polycarbonate resin particles (B) is more preferably in the range of 0.70-0.92, more preferably in the range of 0.75-0.90.
  • the sphericity can be measured by using, for example, a flow type particle image analyzer “FPIA-3000S” manufactured by Sysmetas Corporation. Further, since the polycarbonate resin particles (B) have such an irregular shape, the light diffusivity is considered to be increased.
  • the method of making the polycarbonate resin amorphous particles is not particularly limited as long as the particles can be formed into particles having an irregular shape.
  • a mechanical grinding method or a chemical grinding method can be mentioned.
  • the mechanical pulverization method is generally a mechanical pulverization method at room temperature.
  • freeze pulverization is performed by instantly freezing and embrittlement of the polycarbonate resin with a refrigerant such as liquid nitrogen. The method can also be used.
  • the chemical pulverization method is, for example, a method in which a polycarbonate resin is dissolved by heating in a good solvent. After making the solution, the cooling power while stirring ⁇ or the poor solution with stirring to the resin solution, or the resin solution is added dropwise with stirring to the poor solvent, polycarbonate against the good solvent This is a method of reducing the solubility of the resin and precipitating it as particles.
  • the good solvent used in the chemical pulverization method include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; halogenated hydrocarbons such as dichloromethane, chloroform, tetrataromethane, and the like.
  • the amorphous polycarbonate resin particles (B) preferably have an average particle size of 0.:! To 20 / im, more preferably 0.:! To 10 ⁇ :! 8 ⁇ ⁇ is especially preferred. If the average particle size is within this range, the light diffusibility with high haze is improved.
  • the average particle diameter means a median diameter (d50) obtained by measuring a particle size distribution by a laser diffraction / scattering method.
  • An example of an apparatus for measuring the particle size distribution by the laser diffraction / scattering method is the “Microtrack” series manufactured by Nikkiso Co., Ltd.
  • the acrylic resin particles (C) used in the present invention are used as a light diffusing agent in the same manner as the amorphous polycarbonate resin particles (B).
  • the acrylic resin particles (C) include acrylic resin particles (C1) and acrylic urethane resin particles (C2).
  • the acrylic resin particles (C1) include (meth) acrylate polymers.
  • the (meth) acrylate polymer is a polymer obtained by polymerizing (meth) acrylate, and examples of the (meth) acrylate include methyl (meth) acrylate and ethyl (meth). Examples include acrylate, propyl (meth) acrylate, and butyl (meth) acrylate.
  • the meta) acrylate may be used alone or in combination of two or more.
  • aromatic vinyl monomers such as styrene, vinyl tolylene, monomethyl styrene and halogenated styrene may be used in combination for polymerization.
  • the polymerization may be carried out using a crosslinkable monomer such as aryl methacrylate and triaryl cyanurate in combination.
  • acrylic urethane resin particles (C2) an acrylic acid-treated acrylic resin particle obtained by treating an acrylic resin particle having a hydroxyl group with an isocyanate or an isocyanate and a compound having a hydroxyl group, and a polyurethane resin particle are charged together with an acrylic monomer.
  • acrylic resin-coated urethane resin particles obtained by polymerization include acrylic resin-coated urethane resin particles obtained by polymerization.
  • the acrylic resin particles (C) preferably have an average particle size of 1 to 30 x m, more preferably 5 to 20 z m. If the average particle diameter is within this range, the light diffusibility with high haze is improved.
  • the acrylic resin particles (C) have a spherical shape, since high light diffusibility and high light transmittance can be obtained by using together with the amorphous polycarbonate resin particles.
  • the spherical shape means that the sphericity is 0.95 or more.
  • the blending amount of the amorphous polycarbonate resin particles (B) with respect to 100 parts by mass of the binder resin (A) is preferably 1 to 100 parts by mass. Further, in order to achieve both high light diffusibility and high light transmittance, the blending amount of the amorphous polycarbonate resin particles (B) with respect to 100 parts by mass of the binder resin (A) is preferably 5 to 50 parts by mass. 8 to 35 parts by mass is more preferred. 10 to 14 parts by mass is more preferred.
  • the amorphous polycarbonate resin particles (B) and the acrylic resin particles (C) are used in combination, the amorphous polycarbonate resin particles (B) and the acrylic resin particles (B) with respect to 100 parts by mass of the binder resin (A) (
  • the total blending amount of C) is preferably 5 to 80 parts by mass, more preferably 10 to 60 parts by mass, and even more preferably 15 to 60 parts by mass.
  • the blending amount of the amorphous polycarbonate resin particles (B) and the acrylic resin particles (C) is within this range, a high level, light diffusibility, a high level, and light transmittance can be obtained.
  • the coating agent for a light diffusion sheet of the present invention may contain organic resin particles other than the amorphous polycarbonate resin particles (B) and the acrylic resin particles (C).
  • organic resin particles include polyurethane resin particles, polyvinyl chloride resin particles, polystyrene resin particles, polyacrylonitrile resin particles, polyamide resin particles, silicone resin particles, and polytetrafluoroethylene resin particles. Is mentioned.
  • the coating material for a light diffusing sheet of the present invention includes, if necessary, a silicone system in addition to the binder resin (A), the amorphous polycarbonate resin particles (B) and the acrylic resin particles (C). Additives such as leveling agents, reactive silicone leveling agents, fluorine leveling agents, reactive fluorine leveling agents, and antistatic agents may be added.
  • a silicone leveling agent, a reactive silicone leveling agent, a fluorine leveling agent, or a reactive fluorine leveling agent is added to the coating material for a light diffusion sheet of the present invention.
  • the blending amount is set as necessary, but is preferably 0.:! To 5 parts by mass with respect to 100 parts by mass of the binder resin (A). If it is this range, a uniform coating film without a coating-film defect can be formed.
  • the antistatic agent examples include surfactants, lithium salts, inorganic oxide sols, organic conductive fine particles, organic conductive polymer fine particles, and the like. Fine particles and organic conductive polymer particles are preferable because they are not easily affected by the humidity in the air, and can impart a stable antistatic property to the coating film.
  • the blending amount is preferably:! To 50 parts by mass with respect to 100 parts by mass of the binder resin (A).
  • a method for producing a light diffusing sheet using the coating material for a light diffusing sheet of the present invention can be appropriately selected.
  • the coating material is applied to a substrate using a bar coater, die coater, gravure coater, etc., and the solvent in the coating material is heated in a heating furnace at 40 to 60 ° C. or on a hot plate or hot roller.
  • the coating material is formed on the base material by forming a coating film according to the conditions under which the binder resin (A) forms the coating film.
  • the method of forming the light-diffusion layer which consists of these coating films is mentioned.
  • Examples of the material of the base material used in the light diffusion sheet of the present invention include polyester resins such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; polyolefin resins such as polypropylene, polyethylene, and polymethylpentene 1-1 Cellulose resins such as triacetyl cellulose; polystyrene resin, polyamide resin, polycarbonate resin, norbornene resin (for example, “Zeonor” manufactured by Nippon Zeon Co., Ltd.), modified norbornene resin (for example, “Arton” manufactured by CFSR Corporation) "), Cyclic olefin fin copolymer (for example,” Abel “manufactured by Mitsui Chemicals, Inc.) and the like. Two or more of these base materials can be used together. These base materials are in the form of a film or a sheet, and the thickness thereof is preferably 20 to 500 mm 111.
  • the coating material for a light diffusion sheet of the present invention when applied to a substrate, the coating material may be diluted with a solvent in order to obtain a viscosity suitable for application.
  • Solvents used for dilution include, for example, aromatic hydrocarbons such as toluene and xylene; alcohols such as methanol, ethanol and isopropyl alcohol; esters such as ethyl acetate and ethyl solvate acetate; methyl ethyl ketone and methyl isobutyl. Ketones such as ketone and cyclohexanone are exemplified. These solvents may be used alone or in combination of two or more.
  • the film thickness of the light diffusing layer as the coating force of the coating material for the light diffusing sheet of the present invention is a force selected as necessary:! To 40 / im force S, more preferably:! To 30 / im, particularly preferably 3 to 20 ⁇ . If the film thickness of the light diffusion layer is within this range, it is preferable because high light diffusibility and light transmittance can be obtained.
  • PC resin particles (1) 115 parts by mass (8 parts by mass as PC resin particles (1)) and 5 parts by mass of a photopolymerization initiator (1-hydroxycyclohexenoyl diketone) were mixed and stirred, and diluted with ethyl acetate to obtain a nonvolatile content of 30 parts by mass.
  • % Coating material (1) was obtained.
  • the PC resin particles (1) are precipitated as particles by dropping a resin solution in which a polycarbonate resin is dissolved in cyclohexanone with stirring into a mixed solvent of methyl ethyl ketone and n_butyl acetate. It is manufactured by the chemical powder method.
  • Example 2 In the same manner as in Example 1 except that the blending number of the PC resin particles (1) used in Example 1 was changed to 10 parts by mass, 12 parts by mass, 14 parts by mass, or 20 parts by mass, a coating material (2 ) To (5) were obtained.
  • Example 1 except that the compounding part number of the PC resin particles (1) used in Example 1 was changed to 30 parts by mass or 35 parts by mass and diluted with ethyl acetate so that the nonvolatile content was 20% by mass. In the same manner, coating materials (6) to (7) were obtained.
  • the PC resin particles (2) are prepared by adding a resin solution obtained by heating and dissolving a polycarbonate resin in cyclohexanone to a mixed solvent with n-butyl acetate while stirring and depositing them as particles. It is manufactured by.
  • the PC resin particle (3) is a chemical powder method in which a resin solution obtained by heating and dissolving a polycarbonate resin in cyclohexanone is dropped into a mixed solvent of n-butyl acetate / isobutyl acetate with stirring, and precipitated as particles. It is manufactured by.
  • Example 3 100 parts by mass of the trifunctional urethane acrylate used in Example 3 was replaced with 70 parts by mass of the trifunctional urethane acrylate and dipentaerythritol hexaatalylate (“Charad DPHA” manufactured by Nippon Kayaku Co., Ltd .; DPHA ”)
  • a coating material (10) was obtained in the same manner as in Example 3 except that the combination with 30 parts by mass was used.
  • Acrylic polyol (“Platacel DC2209” manufactured by Daicel Chemical Industries, Ltd., rataton modified acrylic polyol, nonvolatile content 50% by weight) 180 parts by weight (90 parts by weight as nonvolatile content), and dibutyltin dilaurate (“Neostan U_ manufactured by Nitto Kasei Co., Ltd.) 100 ”, non-volatile content 0.38% by mass) 4 parts by mass, and the same solvent dispersion of PC resin particles (1) used in Example 1 171.4 parts by mass (as PC resin particles (1) 12 After mixing and stirring, the mixture was further diluted with ethyl acetate to obtain a coating material (11) having a nonvolatile content of 35% by mass. The coating material (11) was used in the form of a polyisocyanate described later before being applied to the substrate. [0063] (Example 12)
  • thermoplastic acrylic polymer (“Paraloid B48N” manufactured by Rohm and Haas) was dissolved in 150 parts by mass of methyl ethyl ketone to obtain 250 parts by mass of a resin solution.
  • 250 parts by mass of the resin solution the same as that used in Example 12, (1) 25 parts by mass of acrylic resin particles, and 115 parts by mass of a solvent dispersion of PC resin particles used in Example 1 Parts (8 parts by mass as PC resin particles (1)) were mixed and stirred, and further diluted with ethyl acetate to obtain a coating material (13) having a nonvolatile content of 30%.
  • Acrylic polyol (“Platacel DC2209” manufactured by Daicel Chemical Industries, Ltd., rataton modified acrylic polyol, nonvolatile content 50% by weight) 180 parts by weight (90 parts by weight as nonvolatile content), dibutyltin dilaurate ("Neostan U-” manufactured by Nitto Kasei Co., Ltd.) 100 ”, non-volatile content 0.38% by mass) 4 parts by mass, solvent dispersion of 25 parts by mass of the same acrylic resin particles as used in Example 12, and PC resin particles (1) as used in Example 1 After 115 parts by mass of the liquid (8 parts by mass as PC resin particles (1)) was mixed and stirred, it was further diluted with ethyl acetate to obtain a coating material (14) having a nonvolatile content of 35% by mass. The coating material (14) was used after adding a polyisocyanate described later before coating the substrate.
  • Example 12 acrylic urethane resin particles (“BC79” manufactured by Gifu Shellac Manufacturing Co., Ltd., average particle size: 8 ⁇ m, shape: spherical, sphericity: 0.97)
  • a coating material (15) having a nonvolatile content of 40% by mass was obtained in the same manner as in Example 12 except that was used. [0067] (Examples 16 to 19)
  • a non-volatile content of 40% by mass was obtained in the same manner as in Example 12 except that the blending number of the acrylic resin particles used in Example 12 was changed to 10 parts by mass, 20 parts by mass, 30 parts by mass, or 50 parts by mass. Coating materials (16) to (: 19) were obtained.
  • styrene resin particles (“SBX-12” manufactured by Sekisui Plastics Co., Ltd., crosslinked polystyrene resin particles, average particle size: 12 ⁇ , shape: spherical, true sphere
  • the coating material (C2) having a nonvolatile content of 45% by mass was obtained in the same manner as in Comparative Example 1 except that the degree was 0.997).
  • wax microcrystalline wax
  • XD-448 manufactured by Gifu Shellac Co., Ltd.
  • solid paraffin in n_butyl acetate A coating material (C3) having a nonvolatile content of 45% by mass was obtained in the same manner as in Comparative Example 1 except that 120 parts by mass (12 parts by mass as wax) was used.
  • Coating was carried out in the same manner as in Comparative Example 1 except that the blending amount of the acrylic resin particles used in Comparative Example 1 was changed from 12 parts by mass to 33 parts by mass and diluted with ethyl acetate so that the nonvolatile content became 40% by mass. Material (C5) was obtained.
  • the amount of the acrylic resin particles used in Comparative Example 1 was changed from 12 parts by mass to 100 parts by mass, and was the same as Comparative Example 1 except that the nonvolatile content was 40% by mass, and diluted with ethyl acetate.
  • a coating material (C7) was obtained.
  • Example 12 Similar to Example 12 except that 80 parts by mass of the same solvent dispersion of wax as that used in Comparative Example 3 (8 parts by mass as wax) was used instead of the PC resin particles (1) used in Example 12. As a result, a coating material (C9) having a nonvolatile content of 40% by mass was obtained.
  • Example 12 In the same manner as in Example 12 except that the same silica beads as used in Comparative Example 4 were used instead of the PC resin particles (1) used in Example 12, a coating material (C10 )
  • the coating materials (1) to (: 10), (12), (15) to (21) and (C1) to (C10) prepared above are ultraviolet curable coating materials, (11) and (14) are thermosetting coating materials, and the coating material (13) is a solvent evaporation drying type coating material. [0080] (Measurement of average particle diameter of resin particles)
  • the average particle size of the resin particles (PC resin particles (1) to (3), acrylic resin particles, acrylic urethane resin particles, and styrene resin particles) used in the examples and comparative examples is determined by measuring each resin particle size distribution analyzer (“Microtrack FRA” manufactured by Nikkiso Co., Ltd.) was used to measure the particle size distribution, and the median diameter (d50) of the obtained particle size distribution was defined as the average particle size.
  • the sphericity of the resin particles (PC resin particles (1) to (3), acrylic resin particles, acrylic urethane resin particles, and styrene resin particles) used in Examples and Comparative Examples was measured by the following method. First, as a sample for measuring the sphericity, a solvent dispersion of PC resin particles (1) to (3), acrylate resin particles, acrylic urethane resin particles, or styrene resin particles were diluted with ethyl acetate, Dispersion was carried out using a sonic vibrator to prepare a dispersion of resin particles of 0.014% by mass of resin particles.
  • the degree of circularity of the prepared dispersion of resin particles is measured using a flow type particle image analyzer (“FPIA-3000S” manufactured by Sysmetas Corporation), and the true sphere of each resin particle is calculated from the average of the circularity. I asked for a degree.
  • FPIA-3000S flow type particle image analyzer
  • amorphous polycarbonate particles (PC resin particles (1)) used in the examples were observed using an optical microscope (“Digital Microscope VHX-200” manufactured by Keyence Corporation, magnification: 3000 ⁇ ).
  • Figure 1 shows a photomicrograph of amorphous polycarbonate particles.
  • the acrylic resin particles used in Examples and Comparative Examples were also observed in the same manner.
  • Fig. 2 shows a photomicrograph of talyl resin particles.
  • Examples 1 to 21 and Comparative Examples 1 to 10 The coating materials obtained in 10 were placed in a glass bottle and allowed to stand at room temperature for 1 week. The condition of the coating material after standing for 1 week was confirmed, and the coating material storage stability was evaluated according to the following criteria. For the coating material (11) obtained in Example 11 and the coating material (14) obtained in Example 14, the coating material before adding the polyisocyanate was evaluated.
  • Examples 1 to 10, 12, 15 to 21 and Comparative Examples 1 to 10 A light diffusion sheet having a light diffusion layer made of a cured coating film of the coating material obtained in 10 was obtained.
  • the polyisocyanate (Dainippon Ink Chemical) was added to 292.5 parts by mass of the coating material (11) obtained in Example 11 or 351.5 parts by mass of the coating material (14) obtained in Example 14. (Burnock DN-950, manufactured by Kogyo Co., Ltd., non-volatile content: 75% by mass) 13. After mixing 3 parts by mass, stirring and diluting with ethyl acetate, a thermosetting coating material with non-volatile content of 30% by mass was prepared. Obtained.
  • this coating material was applied to a polyethylene terephthalate sheet (“Cosmo Shine” manufactured by Toyobo Co., Ltd., thickness 188 / m) using a bar coater, and the solvent was removed and the resin was added on a 100 ° C. hot plate. Then, a light diffusion sheet having a light diffusion layer composed of a cured coating film of the coating material obtained in Example 11 or 14 was obtained.
  • the acrylic polyol and the polyisocyanate were thermally cured to produce acrylic urethane. It becomes a system resin.
  • the coating material (13) obtained in Example 13 above was applied to a polyethylene terephthalate sheet (“Cosmo Shine” manufactured by Toyobo Co., Ltd., thickness 188 ⁇ m) using a bar coater, and 60 ° It was dried on a C hot plate to obtain a light diffusing sheet having a light diffusing layer serving as a coating force of the coating material obtained in Example 13.
  • a polyethylene terephthalate sheet (“Cosmo Shine” manufactured by Toyobo Co., Ltd., thickness 188 ⁇ m)
  • ⁇ Slightly uneven or uneven.
  • the surface of the light diffusing sheet obtained above was rubbed by hand with a paper wiper (“Kimwipe S-200” manufactured by Cressia Co., Ltd.), and then the surface of the light diffusing sheet was visually confirmed. Was used to evaluate the scratch resistance.
  • the light diffusion layer does not peel off.
  • Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7
  • Abrasion resistance ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ Haze value (%) 60 80 89 93 96 97 97 Light transmittance (%) 90 93 93 90 84 82 83
  • the coating materials for light diffusing sheets of Examples 1 to 21 of the present invention are hardened over time.
  • the light diffusing sheet using the coating material for a light diffusing sheet of the present invention has high light diffusibility even with a small amount of a light diffusing agent. It has been found that the scratch resistance is also good.
  • Comparative Examples acrylic resin particles, acrylic urethane resin particles, styrene resin particles, wax, and silica beads were used alone as the light diffusing agent (Comparative Examples:! To 4 and 6), Examples using only acrylic resin particles and increasing the blending amount (Comparative Examples 5 and 7), Examples using acrylic resin particles as the main component and styrene resin particles, wax or silica beads (Comparative Example 8) ⁇ 10) were evaluated.
  • the evaluation results of each comparative example were as follows.
  • Comparative Example 1 is an example of a coating material using only acrylic resin particles as a light diffusing agent. This coating material produced a hard cake over time and had a problem in coating material storage stability. Compared with Examples 3, 8 and 9 containing the same amount of light diffusing agent, the haze value is significantly low and the light diffusibility is insufficient, and the light diffusing layer is slightly bumpy and uneven. I understood that.
  • Comparative Example 2 is an example of a coating material using only styrene resin particles as a light diffusing agent. This coating material produced a little hard cake over time, and there was a slight problem in coating material storage stability. In addition, compared with Examples 3, 8 and 9 containing the same amount of light diffusing agent, the haze value is low, the light diffusibility is insufficient, and slight unevenness and unevenness occur in the light diffusing layer. I understood.
  • Comparative Example 3 is an example of a coating material using only a wax as a light diffusing agent. Although this coating material had good coating material storage stability, it had a low haze value and insufficient light diffusibility compared to Examples 3, 8 and 9 containing the same amount of light diffusing agent. there were. Further, it was found that bumps and unevenness were generated in the light diffusion layer, and the scratch resistance of the light diffusion layer was insufficient.
  • Comparative Example 4 is an example of a coating material using only silica beads as the light diffusing agent. This coating material produced a hard cake over time, and there was a problem in coating material storage stability. Further, it was found that unevenness and unevenness were generated in the light diffusion layer having a low haze value as compared with Examples 3, 8 and 9 containing the same amount of the light diffusing agent.
  • Comparative Examples 5 and 7 the compounding amount of the acrylic resin particles of the light diffusing agent was increased compared to Comparative Example 1. This is an example. These coating materials produced a hard cake over time, and there was a problem in coating material storage stability. It was also found that the haze value did not improve despite the increase in the amount of the acrylic resin particles, and the light diffusion layer was bumpy or uneven.
  • Comparative Example 6 is an example of a coating material using only acrylic urethane resin particles as a light diffusing agent. With this coating material, a hard cake was formed over time, and there was a problem in coating material storage stability. It was also found that unevenness occurred in the light diffusion layer.
  • Comparative Example 8 is an example of a coating material in which acrylic resin particles and styrene resin particles are used in combination with a light diffusing agent. This coating material produced a hard cake over time, and there was a problem in the storage stability of the coating material. Further, it was found that the haze value was low as compared with Example 10 in which the same amount of the light diffusing agent was blended.
  • Comparative Example 9 is an example of a coating material in which acrylic resin particles and wax are used in combination with a light diffusing agent. This coating material had good coating material storage stability, but the haze value was low and the scratch resistance was insufficient as compared with Example 10 in which the same amount of light diffusing agent was blended in total. I understood.
  • Comparative Example 10 is an example of a coating material in which acrylic resin particles and silica beads are used in combination with a light diffusing agent. This coating material produced a hard cake over time, and there was a problem in coating material storage stability. In addition, it was found that the light diffusion layer having a low haze value was bumpy as compared with Example 10 in which the same amount of the light diffusing agent was blended.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Laminated Bodies (AREA)

Abstract

L’invention concerne un matériau de revêtement pour feuilles de diffusion de la lumière, caractérisé en ce qu’il contient une résine liante (A) et des particules de résine de polycarbonate (B) n’ayant pas de forme particulière. L’invention concerne également une feuille de diffusion de la lumière, caractérisée en ce qu’elle comprend une couche de diffusion de la lumière composée d’un film de revêtement d’un tel matériau de revêtement pour feuilles de diffusion de la lumière.
PCT/JP2006/315834 2005-08-12 2006-08-10 Materiau de revetement pour feuille de diffusion de la lumiere et feuille de diffusion de la lumiere WO2007020870A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2005234248 2005-08-12
JP2005-234248 2005-08-12
JP2006028232 2006-02-06
JP2006-028232 2006-02-06

Publications (1)

Publication Number Publication Date
WO2007020870A1 true WO2007020870A1 (fr) 2007-02-22

Family

ID=37757532

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2006/315834 WO2007020870A1 (fr) 2005-08-12 2006-08-10 Materiau de revetement pour feuille de diffusion de la lumiere et feuille de diffusion de la lumiere

Country Status (2)

Country Link
TW (1) TW200710445A (fr)
WO (1) WO2007020870A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010527046A (ja) * 2007-05-16 2010-08-05 エルジー・ケム・リミテッド アンチグレアフィルム用組成物およびそれを用いて製造したアンチグレアフィルム
EP3455053A4 (fr) * 2016-05-12 2020-01-01 Hewlett-Packard Development Company, L.P. Ensembles de matières

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI414828B (zh) * 2009-12-18 2013-11-11 Eternal Chemical Co Ltd 擴散膜及其製造方法
JP6295237B2 (ja) * 2014-09-30 2018-03-14 富士フイルム株式会社 バックライトユニット、液晶表示装置および波長変換部材
CN110927847A (zh) * 2019-12-23 2020-03-27 宁波长阳科技股份有限公司 反射膜及其制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07234304A (ja) * 1994-02-23 1995-09-05 Soken Kagaku Kk 光拡散板
JP2001108806A (ja) * 1999-10-05 2001-04-20 Tomoegawa Paper Co Ltd フィラーレンズおよびその製造方法
JP2004115599A (ja) * 2002-09-25 2004-04-15 Nippon Paper Industries Co Ltd 塗料組成物及び防眩フィルム
JP2004125958A (ja) * 2002-09-30 2004-04-22 Fuji Photo Film Co Ltd 防眩性反射防止フィルム、偏光板およびそれを用いた液晶表示装置
JP2005121858A (ja) * 2003-10-16 2005-05-12 Toppan Printing Co Ltd 反射シート

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07234304A (ja) * 1994-02-23 1995-09-05 Soken Kagaku Kk 光拡散板
JP2001108806A (ja) * 1999-10-05 2001-04-20 Tomoegawa Paper Co Ltd フィラーレンズおよびその製造方法
JP2004115599A (ja) * 2002-09-25 2004-04-15 Nippon Paper Industries Co Ltd 塗料組成物及び防眩フィルム
JP2004125958A (ja) * 2002-09-30 2004-04-22 Fuji Photo Film Co Ltd 防眩性反射防止フィルム、偏光板およびそれを用いた液晶表示装置
JP2005121858A (ja) * 2003-10-16 2005-05-12 Toppan Printing Co Ltd 反射シート

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010527046A (ja) * 2007-05-16 2010-08-05 エルジー・ケム・リミテッド アンチグレアフィルム用組成物およびそれを用いて製造したアンチグレアフィルム
US8216669B2 (en) 2007-05-16 2012-07-10 Lg Chem, Ltd. Composition for anti-glare film and anti-glare film prepared using the same
EP3455053A4 (fr) * 2016-05-12 2020-01-01 Hewlett-Packard Development Company, L.P. Ensembles de matières
US10889057B2 (en) 2016-05-12 2021-01-12 Hewlett-Packard Development Company, L.P. Material sets

Also Published As

Publication number Publication date
TW200710445A (en) 2007-03-16

Similar Documents

Publication Publication Date Title
JP5365038B2 (ja) 紫外線硬化型塗料、ハードコート層、透明ポリカーボネートシート
WO2015045823A1 (fr) Composition de résine durcissable et composition pour revêtement dur
JP3906802B2 (ja) 光拡散樹脂膜および光拡散フィルム
WO2019003905A1 (fr) Film antireflet, plaque de polarisation et dispositif d'affichage d'image
EP3722842A1 (fr) Film noir faiblement réfléchissant, et stratifié ainsi que procédé de fabrication de celui-ci
KR20190133207A (ko) 방현 코팅 조성물, 그것을 이용한 광학 적층 부재, 및 방현 하드 코팅층의 형성 방법
WO2007020870A1 (fr) Materiau de revetement pour feuille de diffusion de la lumiere et feuille de diffusion de la lumiere
JP2007233329A (ja) 光拡散シート用コーティング材及び光拡散シート
JP6295184B2 (ja) 分散物、フィルム、及びフィルムの製造方法
WO2000034806A1 (fr) Lentille a microbilles et son procede de fabrication
WO2020235357A1 (fr) Agent d'étanchéité pour procédés de dépôt de cristaux liquides, écran d'affichage à cristaux liquides l'utilisant et son procédé de production
JP2011033875A (ja) 光学レンズ用エネルギー線硬化型樹脂組成物及び光学レンズ
JP6379672B2 (ja) 透明基板
TW201945762A (zh) 防眩型硬塗膜及使用該防眩型硬塗膜的光學構件
CN110501765B (zh) 莫尔条纹抑制膜、莫尔条纹抑制膜层叠体、具有莫尔条纹抑制膜的复合显示装置
JP2017024227A (ja) 成形物の製造方法、並びにそれに用いるプラスチックシート及びプラスチックシートロールの製造方法
TW202040166A (zh) 防眩性薄膜、防眩性薄膜之製造方法、光學構件及影像顯示裝置
JP2019065309A (ja) 光湿気硬化型樹脂組成物硬化体
JP6255860B2 (ja) 硬化性樹脂組成物、硬化物、積層体、ハードコートフィルム及びフィルム積層体
JP6427956B2 (ja) フレキシブル透明基板
JP7355032B2 (ja) ウレタン（メタ）アクリレート樹脂、硬化性樹脂組成物、及び硬化物
WO2009110091A1 (fr) Composition de résine diffusant la lumière et feuille diffusant la lumière fabriquée avec cette composition
TW202110651A (zh) 防眩性積層體
JP5088945B2 (ja) 光学用エネルギー線硬化型樹脂組成物及びその硬化物
TW202103965A (zh) 防眩性積層體

Legal Events

Date Code Title Description
DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06782628

Country of ref document: EP

Kind code of ref document: A1