WO2016088633A1 - Composition hautement adhésive, film optique l'utilisant et son procédé de production - Google Patents

Composition hautement adhésive, film optique l'utilisant et son procédé de production Download PDF

Info

Publication number
WO2016088633A1
WO2016088633A1 PCT/JP2015/083161 JP2015083161W WO2016088633A1 WO 2016088633 A1 WO2016088633 A1 WO 2016088633A1 JP 2015083161 W JP2015083161 W JP 2015083161W WO 2016088633 A1 WO2016088633 A1 WO 2016088633A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
film
urethane resin
easy
dispersible urethane
Prior art date
Application number
PCT/JP2015/083161
Other languages
English (en)
Japanese (ja)
Inventor
正浩 吉澤
匡弘 松本
Original Assignee
大倉工業株式会社
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 大倉工業株式会社 filed Critical 大倉工業株式会社
Priority to KR1020177012074A priority Critical patent/KR102382903B1/ko
Priority to JP2016562399A priority patent/JP6664333B2/ja
Priority to CN201580065341.XA priority patent/CN107001853B/zh
Publication of WO2016088633A1 publication Critical patent/WO2016088633A1/fr

Links

Images

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
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/22—Plastics; Metallised plastics
    • C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/245—Vinyl resins, e.g. polyvinyl chloride [PVC]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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

Definitions

  • the present invention relates to an easy-adhesion composition and an optical film having an easy-adhesion layer composed of the easy-adhesion composition. Furthermore, this invention relates to the manufacturing method of this optical film, a polarizing plate provided with this optical film, and an image display apparatus.
  • Acrylic resin films formed from (meth) acrylic polymers typified by polymethyl methacrylate are known to have excellent optical properties such as light transmittance, as well as excellent balance between mechanical strength and moldability. ing. For this reason, the acrylic resin film is applied to an optical film incorporated in an image display device such as a liquid crystal display device (LCD), a plasma display panel (PDP), or an organic EL display device (OLED).
  • LCD liquid crystal display device
  • PDP plasma display panel
  • OLED organic EL display device
  • the optical film is usually used in a state where it is laminated with another functional film.
  • an optical film is used as a polarizer protective film, it is laminated on at least one surface of the polarizer via a hydrophilic adhesive layer.
  • the obtained polarizing plate is used for an image display device or the like. In this case, it is important that the adhesion between the optical film and the polarizer is good.
  • the acrylic resin film is inferior in adhesiveness with a hydrophilic adhesive and has a problem that adhesiveness with a polarizer is not sufficient.
  • a method has been proposed in which an easy-adhesion layer mainly composed of an auxiliary-adhesive resin such as polyester, acrylic, or urethane is provided on the surface of the acrylic resin film to impart easy adhesion to the acrylic resin film.
  • portable devices using an image display device such as an LCD are recently used in various environments, indoors or outdoors, and may require moisture and heat resistance that can withstand high-temperature and high-humidity environments.
  • a polarizing plate used for such an application is required to have high adhesion that does not cause delamination even under high temperature and high humidity.
  • JP 2009-274390 A discloses an aqueous structure containing an acid structure on the surface of an acrylic resin film as a laminated film having good thermal adhesion when exposed to high temperatures and having good adhesion to a polarizer. It describes that an easy-adhesion layer containing an aqueous urethane resin formed by neutralizing a part of an acid structure contained in a urethane resin with a nonvolatile base is described.
  • Japanese Patent Application Laid-Open No. 2009-205135 emulsifies a monomer composition containing polyalkylene glycol (meth) acrylate on the surface of an acrylic resin film as a polarizer protective film having excellent adhesion to a polarizer under high temperature and high humidity. It describes that an easy-adhesion layer is formed with an aqueous (meth) acrylic resin dispersion obtained by polymerization.
  • the optical film having an easy-adhesion layer disclosed in the above document initially exhibits good adhesion, a decrease in adhesion with a polarizer is inevitable when used for a long time under high temperature and high humidity. There is a problem that the initial performance (initial adhesion) is not maintained for a long time. Furthermore, the optical film having an easy-adhesion layer disclosed in the above-mentioned document can be used for a long time under high temperature (for example, 80 ° C.) or high temperature and high humidity (for example, 40 to 60 ° C., 60 to 95% RH). Although the heat-and-moisture resistance is satisfactory, the heat-and-moisture resistance in a harsher environment (for example, 80 ° C. and 90% RH) is not satisfactory.
  • the present invention has been made in view of such problems, and is an easy-adhesive composition that can suppress deterioration in initial performance in long-term use under high temperature and high humidity, and can also satisfy moisture and heat resistance in a harsh environment.
  • An object is to provide an optical film using the same.
  • An easy-adhesive composition comprising resin (B) is provided, (2) The easy-adhesion composition according to (1), wherein the weight ratio of the water-dispersible urethane resin (A) to the water-dispersible urethane resin (B) is in the range of 95: 5 to 40:60.
  • the easy-adhesion composition of the present invention having the above-described configuration suppresses deterioration of initial performance under high temperature and high humidity, and is excellent in heat and humidity resistance under a harsher environment.
  • the term “(meth) acryl” is used as a general term for methacryl, acryl, or both. The same applies to the term “(meth) acrylonitrile”.
  • the easy-adhesion composition of the present invention comprises a water-dispersible urethane resin (A) having a glass transition point (hereinafter referred to as Tg) of less than 60 ° C., a weight increase rate in a hot water resistance test with a Tg of 60 ° C. to 120 ° C. Containing 20% or less of a water-dispersible urethane resin (B).
  • Tg glass transition point
  • B a water-dispersible urethane resin
  • Tg of the water dispersible urethane resin (A) is less than 60 ° C.
  • Tg is preferably ⁇ 25 ° C. or higher and lower than 60 ° C., more preferably ⁇ 15 ° C. or higher and lower than 50 ° C., and further preferably ⁇ 15 ° C. or higher and lower than 45 ° C. If Tg of water-dispersible urethane resin (A) is the said range, it will be excellent in initial stage adhesiveness with a thermoplastic resin film.
  • Tg means a temperature at which the loss elastic modulus (E ′′) has a maximum in dynamic viscoelasticity measurement. More specifically, a dynamic viscoelasticity measuring device (Rheogel- manufactured by UBM Co., Ltd.) E4000) was used to measure the temperature dependence of the loss modulus E ′′ under the conditions of a frequency of 10 Hz and a heating rate of 3 ° C./min. The temperature at which the obtained E ′′ curve becomes a maximum was determined as the glass transition temperature ( ° C).
  • the water dispersible urethane resin (A) preferably has a breaking elongation of 300% or less.
  • the breaking elongation is more preferably 100% or less, and further preferably 50% or less.
  • the adhesiveness with the thermoplastic resin film is excellent.
  • the breaking elongation is measured by the following method.
  • an aqueous dispersion of a water-dispersible urethane resin is prepared so as to have a solid content of 35% by weight, separated into containers such as a petri dish so that the thickness of the urethane resin after drying is about 500 ⁇ m, and dried at room temperature for 15 hours. Then, it is dried at 80 ° C. for 6 hours and further at 120 ° C. for 20 minutes to produce a urethane resin film.
  • the urethane resin film is cut into a size of 15 mm ⁇ 200 mm to cut out a sample, and then a sample in which marks are written at intervals of 50 mm in the center is created.
  • the sample is attached to a tensile tester, the distance between the grips of the tester is set to 100 mm, the sample is measured until it breaks at a speed of 200 mm / min, and is calculated by the following calculation method.
  • the measurement temperature is 23 ° C.
  • Elongation at break (%) ((Distance between gauge points at break-Distance between gauge points before test) / (Distance between gauge points before test)) x 100
  • the water-dispersible urethane resin (B) has a Tg of 60 ° C. or more and 120 ° C. or less and a weight increase rate of 20% or less in the hot water resistance test.
  • the Tg of the water dispersible urethane resin (B) is preferably 65 ° C. or higher and 115 ° C. or lower, more preferably 70 ° C. or higher and 110 ° C. or lower, and further preferably 75 ° C. or higher and 105 ° C. or lower.
  • the weight increase rate in a warm water-resistant test is 15% or less, More preferably, it is 10% or less.
  • the breaking elongation of the water dispersible urethane resin (B) is preferably 100% or less.
  • the breaking elongation is more preferably 50% or less, and further preferably 20% or less.
  • the adhesiveness with the thermoplastic resin film is excellent.
  • the method for measuring the elongation at break is as described above.
  • the weight ratio (A / B) to (B) is preferably 95: 5 to 40:60.
  • the weight ratio (A / B) is more preferably 85:15 to 50:50, still more preferably 80:20 to 60:40, because more excellent adhesion can be obtained.
  • the water-dispersible urethane resins (A) and (B) are not particularly limited as long as they are water-dispersible urethane resins having the above-described characteristics.
  • the organic solvent is inert to isocyanate and compatible with water.
  • a linear urethane prepolymer obtained by reacting a polyisocyanate with a polyol to form an isocyanate group-terminated prepolymer and then reacting with a chain extender having a free carboxyl group in water
  • a chain extender having a free carboxyl group in water
  • water-based as used herein means that the resin is stably dispersed or emulsified in water. Moreover, it is preferable that water-dispersible urethane resin (A) and (B) has a carboxyl group in a molecule
  • polyisocyanates examples include tetramethylene diisocyanate, dodecamethylene diisocyanate, 1,4-butane diisocyanate, hexamethylene diisocyanate, 2,2,4-trimethylhexamethylene diisocyanate, 2,4,4-trimethylhexamethylene diisocyanate, and lysine diisocyanate.
  • Aliphatic diisocyanates such as 2-methylpentane-1,5-diisocyanate, 3-methylpentane-1,5-diisocyanate; isophorone diisocyanate, hydrogenated xylylene diisocyanate, 4,4'-cyclohexylmethane diisocyanate, 1,4- Cycloaliphatic diisocyanate, methylcyclohexylene diisocyanate, 1,3-bis (isocyanatomethyl) cyclohexane Socyanate; tolylene diisocyanate, 2,2'-diphenylmethane diisocyanate, 2,4'-diphenylmethane diisocyanate, 4,4'-diphenylmethane diisocyanate, 4,4'-diphenyldimethylmethane diisocyanate, 4,4'-dibenzyl diisocyanate, 1 , 5-naphthylene diisocyanate, xylylene
  • the polyol is not particularly limited as long as it has two or more hydroxyl groups in the molecule, and any appropriate polyol can be adopted.
  • polyalkylene glycol, polyacryl polyol, polyester polyol, polyether polyol, polyether ester polyol, polycarbonate polyol and the like can be mentioned. These can be used alone or in combination of two or more.
  • Examples of the chain extender having a free carboxyl group include dihydroxycarboxylic acid and dihydroxysuccinic acid.
  • Examples of the dihydroxycarboxylic acid include dialkyrol alkanoic acids such as dimethylol alkanoic acid (for example, dimethylol acetic acid, dimethylol butanoic acid, dimethylol propionic acid, dimethylol butyric acid, dimethylol pentanoic acid). These can be used alone or in combination of two or more.
  • neutralizing agent examples include ammonia, N-methylmorpholine, triethylamine, dimethylethanolamine, methyldiethanolamine, triethanolamine, morpholine, tripropylamine, ethanolamine, triisopropanolamine, 2-amino-2-methyl-1 -Propanol and the like. These can be used alone or in combination of two or more.
  • chain extenders include low molecular weight diol compounds such as ethylene glycol, propylene glycol, 1,4-butanediol, neopentyl glycol, furan methanol, diethylene glycol, triethylene glycol, tetraethylene glycol, and the like.
  • Polyether diol compounds obtained by addition polymerization of ethylene oxide, propylene oxide, tetrahydrofuran, etc .; obtained from the above low molecular weight diol compounds and dicarboxylic acids such as (anhydrous) succinic acid, adipic acid, (anhydrous) phthalic acid, and their anhydrides Polyester diols having a hydroxyl group at the terminal; polyhydric alcohols such as trimethylolethane and trimethylolpropane; amino alcohols such as monoethanolamine, diethanolamine and triethanolamine Lumpur ethylenediamine, propylene diamine, butylene diamine, hexamethylene diamine, phenylene diamine, toluene diamine, xylene diamine, diamine compounds such as isophoronediamine; water, ammonia, hydrazine, may be mentioned dibasic acid hydrazide and the like. These can be used alone or in combination of two or more.
  • the number average molecular weight of the water-dispersible urethane resins (A) and (B) is preferably 5000 to 600000, more preferably 10,000 to 400000.
  • the acid value of the water-dispersible urethane resin is preferably 10 or more, more preferably 10 to 50, and particularly preferably 20 to 45.
  • the easy-adhesion composition may be diluted with an aqueous solvent from the viewpoint of workability when forming the easy-adhesion layer.
  • aqueous solvent include water or water and hydrophilic organic solvents (for example, alcohol solvents such as methanol, ethanol, isopropyl alcohol, ethylene glycol, and propylene glycol; ester solvents such as ethyl acetate, butyl acetate, and ⁇ -butyrolactone; A mixed solvent with a ketone solvent such as acetone; an ether solvent such as tetrahydrofuran or dioxane; an aprotic polar solvent such as N-methylpyrrolidone) can be used, but water is particularly preferable.
  • alcohol solvents such as methanol, ethanol, isopropyl alcohol, ethylene glycol, and propylene glycol
  • ester solvents such as ethyl acetate, butyl acetate, and ⁇ -butyrolactone
  • the content of the water-dispersible urethane resins (A) and (B) in the easy-adhesive composition is not particularly limited, and may be appropriately set in consideration of application workability and the like, for example, 1 to 25% by weight is preferable. More preferably, it is 3 to 20% by weight, still more preferably 5 to 15% by weight. If the water-dispersible urethane resins (A) and (B) in the easy-adhesive composition are in the above ranges, it is preferable because workability at the time of forming the easy-adhesive layer is excellent.
  • the solid content of the easy-adhesive composition may be appropriately set in consideration of application workability and the like, but is preferably 1 to 30% by weight, more preferably 2 to 25% by weight, and further preferably 3 to 20% by weight. %.
  • the easy-adhesion composition can contain any appropriate fine particles, preferably water-dispersible fine particles, in accordance with a desired function.
  • the fine particles either inorganic fine particles or organic fine particles can be used.
  • the inorganic fine particles include inorganic oxides such as silica, titania, alumina, zirconia, calcium carbonate, talc, clay, calcined kaolin, calcined calcium silicate, hydrated calcium silicate, aluminum silicate, magnesium silicate, calcium phosphate, and the like.
  • the organic fine particles include silicone resins, fluorine resins, (meth) acrylic resins, (meth) acrylonitrile resins, and the like.
  • silica or (meth) acrylonitrile resin is preferable. Fine particles made of silica or (meth) acrylonitrile-based resin are excellent in blocking suppression ability, excellent in transparency, do not cause haze, and are not colored, so that the easy-contact layer has less influence on optical properties. In addition, the strength and adhesion of the easy-adhesion layer are reduced by adding fine particles, but the easy-adhesion layer containing fine particles made of (meth) acrylonitrile resin is the strength and adhesion of the easy-adhesion layer. It is particularly preferable because it is possible to suppress the decrease in the thickness.
  • the average particle diameter of the fine particles is not particularly limited, but is preferably 1 to 500 nm, more preferably 50 to 350 nm, and still more preferably 100 to 300 nm from the viewpoint of maintaining the transparency of the easy-adhesion layer.
  • the above average particle diameter means a median diameter (d50) measured by laser diffraction / scattering particle size distribution measurement.
  • the content of the fine particles is preferably 0.1 to 15 parts by weight with respect to a total of 100 parts by weight of the water-dispersible urethane resins (A) and (B) in terms of solid content. More preferred is 0.3 to 5 parts by weight, still more preferred is 0.5 to 3 parts by weight. In addition, what is necessary is just to mix
  • the easy-adhesion composition may be blended with a crosslinking agent in order to improve heat and humidity resistance under high temperature and high humidity.
  • a crosslinking agent can be adopted as the crosslinking agent, and examples thereof include urea, epoxy, melamine, isocyanate, oxazoline, silanol, and carbodiimide.
  • the easy-adhesion composition can further contain any appropriate additive.
  • the additive include a dispersion stabilizer, a thixotropic agent, an antioxidant, an ultraviolet absorber, an antifoaming agent, a thickener, a dispersant, a surfactant, a catalyst, a lubricant, and an antistatic agent.
  • FIG. 1 shows an example of the optical film of the present invention.
  • An optical film 1 shown in FIG. 1 has an easy adhesion layer 3 formed from the above-mentioned easy adhesion composition on one surface of a thermoplastic resin film 2.
  • an easy adhesion layer may be formed on both surfaces of the thermoplastic resin film.
  • thermoplastic resin constituting the thermoplastic resin film examples include cellulose resins such as triacetyl cellulose, polyester resins, polyether sulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, Examples include cyclic polyolefin resins, (meth) acrylic resins, polyarylate resins, polystyrene resins, and polyvinyl alcohol resins. These can be used alone or in combination of two or more. Among these, the (meth) acrylic resin (hereinafter sometimes abbreviated as ACR) is inferior in adhesiveness with a hydrophilic adhesive, and therefore the effect of the present invention is particularly remarkable when ACR is used.
  • ACR the (meth) acrylic resin
  • the TCR of ACR is preferably 115 ° C. or higher, more preferably 120 ° C. or higher, and further preferably 125 ° C. or higher.
  • the thermoplastic resin film can be made excellent in durability by containing ACR having a Tg of 115 ° C. or higher as a main component.
  • the upper limit of Tg is not particularly limited, but is preferably 170 ° C. or lower from the viewpoint of moldability and the like.
  • ACR examples include poly (meth) acrylic acid esters such as polymethyl methacrylate, methyl methacrylate- (meth) acrylic acid copolymers, methyl methacrylate- (meth) acrylic acid ester copolymers, and methyl methacrylate.
  • polymer having an alicyclic hydrocarbon group for example, methyl methacrylate-methacrylic acid
  • Acid cyclohexyl copolymer resistance methyl methacrylate- (meth) acrylate norbornyl copolymer, etc.
  • poly (meth) acrylate C1-6 alkyl such as poly (meth) acrylate is preferable, and methacrylic acid having methyl methacrylate as a main component (50 to 100% by weight, preferably 70 to 100% by weight) is preferable.
  • An acid methyl resin is more preferable.
  • ACR include, for example, “Acrypet (registered trademark) VH”, “Acrypet (registered trademark) VRL20A” manufactured by Mitsubishi Rayon Co., Ltd., high Tg (meta) obtained by intramolecular crosslinking and intramolecular cyclization reaction.
  • An acrylic resin is mentioned.
  • the ACR preferably has a ring structure in the main chain in that it has high heat resistance, high transparency, and high mechanical strength.
  • the ACR having a ring structure in the main chain include a resin having a glutaric anhydride structure or a glutarimide structure (WO2007 / 26659, WO2005 / 108438), a maleic anhydride structure or an N-substituted maleimide structure. Resins (Japanese Patent Laid-Open Nos. 57-153008 and 2007-31537) and resins having a lactone ring structure (Japanese Patent Laid-Open Nos. 2006-96960, 2006-171464, and 2007-63541) JP, 2008-191426, A).
  • the thermoplastic resin film may contain an additive.
  • additives include hindered phenol-based, phosphorus-based and sulfur-based antioxidants; light-resistant stabilizers, weather-resistant stabilizers, heat stabilizers and other stabilizers; reinforcing materials such as glass fibers and carbon fibers; ultraviolet rays Absorbers; Near infrared absorbers; Flame retardants; Antistatic agents such as anionic, cationic and nonionic surfactants; Colorants such as inorganic pigments, organic pigments and dyes; Organic fillers and inorganic fillers; Resin modification Agents; organic fillers and inorganic fillers; plasticizers; lubricants; antistatic agents; flame retardants;
  • thermoplastic resin film is not particularly limited.
  • the thermoplastic resin and other polymers and additives are sufficiently mixed by any appropriate mixing method and heated in advance. From the plastic resin composition, it can be formed into a film.
  • the thermoplastic resin and other polymers, additives, and the like may be made into separate solutions and mixed to form a uniform mixed solution, and then formed into a film.
  • the film raw material is pre-blended with any appropriate mixer such as an omni mixer, and then the obtained mixture is extruded and kneaded.
  • the kneader used for extrusion kneading is not particularly limited.
  • any suitable mixer such as an extruder such as a single screw extruder or a twin screw extruder or a pressure kneader may be used. Can do.
  • the film forming method examples include any appropriate film forming method such as a solution casting method (solution casting method), a melt extrusion method, a calendar method, and a compression molding method. Of these film forming methods, the melt extrusion method is preferred.
  • melt extrusion method examples include a T-die method and an inflation method.
  • the molding temperature is preferably 150 to 350 ° C, more preferably 200 to 300 ° C.
  • a T-die When forming a film by the T-die method, a T-die is attached to the tip of a known single-screw extruder or twin-screw extruder, a film is formed by the T die, and then the film is wound to form a roll. A film can be obtained.
  • the thermoplastic resin film may be an unstretched film or a stretched film.
  • a stretched film either a uniaxially stretched film or a biaxially stretched film may be used.
  • a biaxially stretched film either a simultaneous biaxially stretched film or a sequential biaxially stretched film may be used.
  • biaxial stretching the mechanical strength is improved and the film performance is improved.
  • the stretching temperature is preferably in the vicinity of the glass transition temperature of the thermoplastic resin composition that is a film raw material, specifically, preferably (Tg-30 ° C) to (Tg + 100 ° C), more preferably (Tg-20). ° C) to (Tg + 80 ° C). If the stretching temperature is less than (Tg-30 ° C.), a sufficient stretching ratio may not be obtained. On the other hand, when the stretching temperature exceeds (Tg + 100 ° C.), the resin composition may flow and stable stretching may not be performed.
  • the draw ratio defined by the area ratio is preferably 1.1 to 25 times, more preferably 1.3 to 10 times. There exists a possibility that it may not lead to the improvement of the toughness accompanying extending
  • the stretching speed is unidirectional, preferably 10 to 20,000% / min, more preferably 100 to 10,000% / min. When the stretching speed is less than 10% / min, it takes time to obtain a sufficient stretching ratio, and the production cost may increase. If the stretching speed exceeds 20,000% / min, the stretched film may be broken.
  • thermoplastic resin film can be subjected to a heat treatment (annealing) or the like after the stretching treatment in order to stabilize its optical isotropy and mechanical properties.
  • Arbitrary appropriate conditions can be employ
  • the thickness of the thermoplastic resin film is preferably 5 to 200 ⁇ m, more preferably 10 to 100 ⁇ m. If the thickness is less than 5 ⁇ m, sufficient strength as an optical film may not be obtained. When the thickness exceeds 200 ⁇ m, the transparency is lowered and there is a possibility that it is not suitable for use as an optical film.
  • the thickness of the easy-adhesion layer can be set to any appropriate value.
  • the thickness is preferably 0.1 to 10 ⁇ m, more preferably 0.1 to 5 ⁇ m, and particularly preferably 0.2 to 1 ⁇ m. By setting to such a range, it is excellent in adhesiveness with another functional film, and it can suppress that a phase difference expresses in an easily bonding layer.
  • the functional layer is, for example, an antistatic layer, an adhesive layer, an adhesive layer, an easy adhesion layer, an antiglare layer (non-glare) layer, an antifouling layer such as a photocatalyst layer, an antireflection layer, a hard coat layer, an ultraviolet shielding layer, A heat ray shielding layer, an electromagnetic wave shielding layer, a gas barrier layer, etc. are mentioned.
  • the optical film can be used as, for example, a polarizer protective film, a retardation film, a viewing angle compensation film, a light diffusion film, a reflection film, an antireflection film, an antiglare film, a brightness enhancement film, and a conductive film for a touch panel.
  • a polarizer protective film is particularly preferable.
  • a polarizing plate 10 shown in FIG. 2 has an adhesive 5 on the surface of the optical film 1 having the easy adhesion layer 3 formed from the above-mentioned easy adhesion composition on one surface of the thermoplastic resin film 2.
  • the polarizer 6 has a stacked structure.
  • the polarizing plate 10 may have a protective film laminated via an adhesive layer on the opposite side of the polarizer 6 from the optical film 1.
  • any appropriate polarizer can be adopted depending on the purpose.
  • dichroic substances such as iodine and dichroic dyes are adsorbed on hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene-vinyl acetate copolymer partially saponified films.
  • polyene-based oriented films such as a uniaxially stretched product, a polyvinyl alcohol dehydrated product and a polyvinyl chloride dehydrochlorinated product.
  • a polarizer obtained by adsorbing a dichroic substance such as iodine on a polyvinyl alcohol film and uniaxially stretching is particularly preferable because of its high polarization dichroic ratio.
  • the thickness of these polarizers is not particularly limited, but is generally about 1 to 80 ⁇ m.
  • the adhesive layer is formed from an adhesive composition containing a polyvinyl alcohol-based resin.
  • Arbitrary appropriate protective films can be employ
  • the image display apparatus of the present invention includes the polarizing plate described above.
  • Specific examples of the image display device include a self-luminous display device such as an electroluminescence (EL) display, a plasma display (PD), a field emission display (FED), and a liquid crystal display (LCD). .
  • EL electroluminescence
  • PD plasma display
  • FED field emission display
  • LCD liquid crystal display
  • An easy-adhesive composition containing a water-dispersible urethane resin (B) having a weight increase rate of 20% or less in a warm water resistance test is applied to at least one surface of a thermoplastic resin film.
  • a film is formed (application process), and then the coating film is dried to form an easy-adhesion layer (drying process).
  • any appropriate method can be adopted as a method of applying the easy-adhesion composition in the application step.
  • Examples thereof include a bar coating method, a roll coating method, a gravure coating method, a rod coating method, a slot orifice coating method, a curtain coating method, and a fountain coating method.
  • the thickness of the coating film formed in the coating process can be appropriately adjusted according to the thickness required when the coating film becomes an easy-adhesion layer.
  • the surface of the thermoplastic resin film to which the easy-adhesion composition is applied is preferably subjected to a surface treatment.
  • the surface treatment is preferably corona discharge treatment or plasma treatment.
  • the drying process is not particularly limited, and a conventionally known method can be used.
  • the drying temperature is typically 50 ° C. or higher, preferably 90 ° C. or higher, more preferably 110 ° C. or higher. By setting the drying temperature in such a range, an optical film excellent in color resistance (particularly under high temperature and high humidity) can be obtained.
  • the upper limit of the drying temperature is preferably 200 ° C. or lower, more preferably 180 ° C. or lower.
  • the stretching may be performed before the formation of the easy-adhesion layer or after the formation of the easy-adhesion layer. Moreover, you may perform formation of an easily bonding layer and extending
  • the thermoplastic resin film on which the coating film of the easy-adhesive composition is formed may be stretched in a heated atmosphere. Due to the heat applied to the film for stretching, the coating film of the easy-adhesive composition formed on the surface of the thermoplastic resin film is dried to form an easy-adhesive layer. If it does in this way, the extending
  • Table 1 shows the glass transition temperature, elongation at break, and weight increase rate of the hot water resistance test for the characteristic values of the water-dispersible urethane resins (A) and (B).
  • Examples 1 to 4 and Comparative Examples 1 to 8 Manufacture of an easily bonding composition
  • the said raw material emulsion was selected and mixed so that each component shown in Table 2 might contain the solid content amount (unit is a weight part) shown in Table 2, and the easily bonding composition was manufactured.
  • ion exchange water was used as an aqueous solvent, and the solid content of the easy-adhesion composition was adjusted to 8% by weight.
  • the polyvinyl alcohol-type adhesive composition was apply
  • peel adhesion strength was evaluated according to the following criteria. ⁇ : Peeling adhesive strength is superior to the reference polarizing plate ⁇ : Peeling adhesive strength is equivalent to the reference polarizing plate ⁇ : Peeling adhesive strength is inferior to the reference polarizing plate ⁇ : Not measured and cannot be measured (2) Moist heat resistance (60 ° C, 90% RH) The measurement sample obtained in the same manner as described above was put in a constant temperature and humidity chamber at a temperature of 60 ° C. and a humidity of 90% RH, and was subjected to a heat treatment that was allowed to stand for 250 hours and 500 hours. The peel adhesion strength was measured. From the measurement results, the peel adhesion strength was evaluated according to the following criteria.
  • Comparative Examples 7 and 8 containing only the water-dispersible urethane resin (B) having a Tg of 60 ° C. or more and 120 ° C. or less and a weight increase rate of 20% or less in the hot water resistance test are high temperature and high humidity treatments. Although the later adhesion was improved, the results showed inferior initial adhesion.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Dispersion Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Adhesive Tapes (AREA)

Abstract

L'objectif de la présente invention concerne : une composition hautement adhésive qui supprime la réduction lors de la performance initiale lorsqu'elle est utilisée pendant une longue durée dans un environnement à haute température et à humidité élevée et qui peut également obtenir une résistance satisfaisante à la chaleur humide, même dans un environnement plus rude ; et un film optique l'utilisant. La solution porte sur une composition hautement adhésive comprenant : une résine (A) d'uréthane dispersible dans l'eau, présentant une température de transition vitreuse inférieure à 60°C ; et une résine (B) d'uréthane dispersible dans l'eau présentant une température de transition vitreuse de 60-120°C et un gain de poids de pas plus de 20 % dans un test de résistance à l'eau chaude. L'invention concerne également un film optique présentant une couche hautement adhésive, comprenant cette composition hautement adhésive, disposée sur au moins une surface d'un film de résine thermoplastique.
PCT/JP2015/083161 2014-12-04 2015-11-26 Composition hautement adhésive, film optique l'utilisant et son procédé de production WO2016088633A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
KR1020177012074A KR102382903B1 (ko) 2014-12-04 2015-11-26 접착 용이 조성물, 및 이것을 사용한 광학 필름과 그 제조 방법
JP2016562399A JP6664333B2 (ja) 2014-12-04 2015-11-26 易接着組成物、及びこれを用いた光学フィルムとその製造方法
CN201580065341.XA CN107001853B (zh) 2014-12-04 2015-11-26 易粘接组合物、及使用了该组合物的光学膜及其制造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-245699 2014-12-04
JP2014245699 2014-12-04

Publications (1)

Publication Number Publication Date
WO2016088633A1 true WO2016088633A1 (fr) 2016-06-09

Family

ID=56091579

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/083161 WO2016088633A1 (fr) 2014-12-04 2015-11-26 Composition hautement adhésive, film optique l'utilisant et son procédé de production

Country Status (5)

Country Link
JP (1) JP6664333B2 (fr)
KR (1) KR102382903B1 (fr)
CN (1) CN107001853B (fr)
TW (1) TWI719954B (fr)
WO (1) WO2016088633A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019155791A1 (fr) * 2018-02-07 2019-08-15 日東電工株式会社 Plaque polarisante et dispositif d'affichage d'image
JP2019139204A (ja) * 2018-02-07 2019-08-22 日東電工株式会社 偏光板および画像表示装置
JP2019183100A (ja) * 2018-03-30 2019-10-24 株式会社日本触媒 易接着性基材
JP2020008861A (ja) * 2018-07-09 2020-01-16 エスケイシー・カンパニー・リミテッドＳｋｃ Ｃｏ．， Ｌｔｄ． 光学多層フィルム、これを含む光学部品および表示装置
WO2022239648A1 (fr) * 2021-05-08 2022-11-17 大倉工業株式会社 Film optique, plaque de polarisation, dispositif d'affichage d'image et procédé de fabrication de film optique
KR20230029528A (ko) 2021-08-23 2023-03-03 오꾸라 고교 가부시키가이샤 광학 필름의 제조 방법

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111890762B (zh) * 2018-07-25 2022-08-02 日东电工株式会社 易粘接薄膜及其制造方法、偏光板以及图像显示装置
JP6739601B1 (ja) * 2019-02-05 2020-08-12 住友化学株式会社 光学積層体及び表示装置
JP7274976B2 (ja) * 2019-08-09 2023-05-17 日東電工株式会社 易接着フィルムおよびその製造方法、偏光板、ならびに画像表示装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006124752A (ja) * 2004-10-27 2006-05-18 Nippon Paint Co Ltd 密着性、耐食性に優れたクロムフリー塗装下地処理剤
JP2006247963A (ja) * 2005-03-09 2006-09-21 Oji Paper Co Ltd インクジェット記録用シート
JP2009081394A (ja) * 2007-09-27 2009-04-16 Toppan Printing Co Ltd 太陽電池裏面封止用シート及びこれを用いた太陽電池モジュール
JP2009193061A (ja) * 2008-01-17 2009-08-27 Nitto Denko Corp 偏光板および偏光板を用いた画像表示装置
JP2010262004A (ja) * 2009-04-30 2010-11-18 Seiko Epson Corp 光学物品およびその製造方法
JP2011183307A (ja) * 2010-03-09 2011-09-22 Sumitomo Metal Ind Ltd 耐結露白化性と耐食性に優れた表面処理鋼板
WO2015098539A1 (fr) * 2013-12-28 2015-07-02 大倉工業株式会社 Film optique et son procédé de fabrication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4798156B2 (ja) * 2008-03-17 2011-10-19 三菱樹脂株式会社 積層フィルム
KR101404875B1 (ko) * 2009-12-04 2014-06-09 도요보 가부시키가이샤 이접착성 열가소성 수지 필름
JP2014534988A (ja) * 2012-05-30 2014-12-25 エルジー・ケム・リミテッド 水系組成物、これを含む光学フィルム、これを用いた偏光板及び液晶表示装置
KR102066640B1 (ko) 2016-09-20 2020-01-15 주식회사 엘지화학 접착력이 우수한 광학 필름, 및 이를 포함하는 편광판

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006124752A (ja) * 2004-10-27 2006-05-18 Nippon Paint Co Ltd 密着性、耐食性に優れたクロムフリー塗装下地処理剤
JP2006247963A (ja) * 2005-03-09 2006-09-21 Oji Paper Co Ltd インクジェット記録用シート
JP2009081394A (ja) * 2007-09-27 2009-04-16 Toppan Printing Co Ltd 太陽電池裏面封止用シート及びこれを用いた太陽電池モジュール
JP2009193061A (ja) * 2008-01-17 2009-08-27 Nitto Denko Corp 偏光板および偏光板を用いた画像表示装置
JP2010262004A (ja) * 2009-04-30 2010-11-18 Seiko Epson Corp 光学物品およびその製造方法
JP2011183307A (ja) * 2010-03-09 2011-09-22 Sumitomo Metal Ind Ltd 耐結露白化性と耐食性に優れた表面処理鋼板
WO2015098539A1 (fr) * 2013-12-28 2015-07-02 大倉工業株式会社 Film optique et son procédé de fabrication

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019155791A1 (fr) * 2018-02-07 2019-08-15 日東電工株式会社 Plaque polarisante et dispositif d'affichage d'image
JP2019139204A (ja) * 2018-02-07 2019-08-22 日東電工株式会社 偏光板および画像表示装置
JP2019183100A (ja) * 2018-03-30 2019-10-24 株式会社日本触媒 易接着性基材
JP7257123B2 (ja) 2018-03-30 2023-04-13 株式会社日本触媒 易接着性基材
JP2020008861A (ja) * 2018-07-09 2020-01-16 エスケイシー・カンパニー・リミテッドＳｋｃ Ｃｏ．， Ｌｔｄ． 光学多層フィルム、これを含む光学部品および表示装置
US11454753B2 (en) 2018-07-09 2022-09-27 Skc Co., Ltd. Optical multilayer film, and optical component and display device comprising the same
WO2022239648A1 (fr) * 2021-05-08 2022-11-17 大倉工業株式会社 Film optique, plaque de polarisation, dispositif d'affichage d'image et procédé de fabrication de film optique
KR20230029528A (ko) 2021-08-23 2023-03-03 오꾸라 고교 가부시키가이샤 광학 필름의 제조 방법

Also Published As

Publication number Publication date
CN107001853B (zh) 2020-09-08
JPWO2016088633A1 (ja) 2017-09-14
CN107001853A (zh) 2017-08-01
TWI719954B (zh) 2021-03-01
KR102382903B1 (ko) 2022-04-04
KR20170093790A (ko) 2017-08-16
TW201627453A (zh) 2016-08-01
JP6664333B2 (ja) 2020-03-13

Similar Documents

Publication Publication Date Title
WO2016088633A1 (fr) Composition hautement adhésive, film optique l'utilisant et son procédé de production
JP6527878B2 (ja) 易接着組成物、及びこれを用いた光学フィルムとその製造方法
JP5354733B2 (ja) 偏光子保護フィルムおよび偏光子保護フィルムを用いた偏光板および画像表示装置
JP5399082B2 (ja) 偏光板および偏光板を用いた画像表示装置
KR101588167B1 (ko) 보호필름 및 이를 포함하는 편광판
JP5366765B2 (ja) 偏光板および画像表示装置
JP2020023170A (ja) 易接着フィルムおよびその製造方法、偏光板、ならびに画像表示装置
TWI629170B (zh) Optical film and method of manufacturing same
JP2011221424A (ja) 偏光板および画像表示装置
JP5771418B2 (ja) 易接着層を有する位相差フィルムの製造方法
JP2018158987A (ja) 易接着剤組成物およびそれを備える偏光子保護フィルム、偏光フィルムならびに画像表示装置
JP2015182449A (ja) 光学フィルムの製造方法
JP2020016872A (ja) 易接着フィルムおよびその製造方法、偏光板、ならびに画像表示装置
WO2020022269A1 (fr) Film optique, son procédé de production, polarisateur et dispositif d'affichage d'image
WO2022239648A1 (fr) Film optique, plaque de polarisation, dispositif d'affichage d'image et procédé de fabrication de film optique
JP2018159784A (ja) 偏光子保護フィルム、偏光フィルムおよび画像表示装置
WO2022255391A1 (fr) Film optique, procédé de fabrication de film optique, élément optique et dispositif d'affichage d'image

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15866222

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2016562399

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 20177012074

Country of ref document: KR

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 15866222

Country of ref document: EP

Kind code of ref document: A1