WO2009088213A2 - 점착제 조성물, 이를 포함하는 편광판 및 액정표시장치 - Google Patents
점착제 조성물, 이를 포함하는 편광판 및 액정표시장치 Download PDFInfo
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- WO2009088213A2 WO2009088213A2 PCT/KR2009/000061 KR2009000061W WO2009088213A2 WO 2009088213 A2 WO2009088213 A2 WO 2009088213A2 KR 2009000061 W KR2009000061 W KR 2009000061W WO 2009088213 A2 WO2009088213 A2 WO 2009088213A2
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- Prior art keywords
- sensitive adhesive
- pressure
- bis
- meth
- acid
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- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
- B32B2457/202—LCD, i.e. liquid crystal displays
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- 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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/05—Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/05—Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
- C09K2323/059—Unsaturated aliphatic polymer, e.g. vinyl
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- 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
- G02F2202/00—Materials and properties
- G02F2202/28—Adhesive materials or arrangements
Definitions
- the present invention relates to a pressure-sensitive adhesive composition having excellent durability and excellent physical properties under high temperature and / or high humidity conditions, and showing excellent low light leakage properties, a polarizing plate, and a liquid crystal display device including the same.
- a liquid crystal display is a device that displays an image by inserting a liquid crystal between two thin glass substrates.
- the device when a voltage is applied through an electrode connected to the liquid crystal, the molecular arrangement of the liquid crystal is changed, and thus, the rate of light passing through the liquid crystal is changed, thereby displaying a picture or color.
- the liquid crystal display device is a display device that is in the spotlight in various fields because of the low power consumption and the planar thinness.
- a liquid crystal cell and a polarizing plate including a glass substrate having a liquid crystal and a transparent electrode layer are basically required, and an adhesive layer or an adhesive layer for bonding them is also required.
- the liquid crystal display may further include a retardation plate, a wide viewing angle compensation plate, or a brightness enhancement film attached to the polarizing plate in order to further improve the function.
- the polarizing plate includes an iodine-based compound or a dichroic polarizing material arranged in a predetermined direction, and has a multi-layered structure including a triacetyl cellulose (TAC) -based protective film for protecting the polarizer on both sides.
- the polarizing plate may additionally include a wide viewing angle compensation film, such as a retardation film or a liquid crystal type film having a unidirectional molecular array.
- TAC triacetyl cellulose
- a method of providing a stress relaxation characteristic by designing the pressure-sensitive adhesive to be large and easy to deform to the external stress Specifically, a method of mixing a low molecular weight material containing or not containing a small amount of a crosslinkable functional group with a high molecular weight polymer including a functional group capable of reacting with a crosslinking agent (Korean Patent Publication No. 1998-79266, Japanese Patent Publication 2002-47468 and Japanese Patent Laid-Open No. 2003-49141 and the like are known.
- the pressure-sensitive adhesive composition disclosed in the above technique is inferior in cutting property, so that a squeezing or squeezing phenomenon of the pressure-sensitive adhesive occurs during the production of the polarizing plate, and thus the yield is greatly reduced.
- Another technique for preventing light leakage is to design the adhesive very hard.
- the pressure-sensitive adhesive has a hard physical property, by minimizing the shrinkage and expansion of the polarizing plate at high temperature and / or high humidity conditions, it is possible to minimize the stress generated, and to concentrate it on the outermost part of the polarizing plate to implement a relatively good optical properties ( Japanese Patent Laid-Open Nos. 2007-197659 and 2007-212995, etc.).
- the pressure-sensitive adhesive composition disclosed in the above publication has some performance in a small display device, but has a problem of poor light leakage control performance in a large device of 20 inches or more.
- the present invention has been made in consideration of the above-described problems of the prior art, and has excellent durability and physical properties (eg cutting property, re-peelability, workability, etc.) under high temperature and / or high humidity conditions, and exhibits excellent low light leakage characteristics. It is an object to provide an adhesive composition, a polarizing plate and a liquid crystal display device using the above.
- the present invention includes a second polyfunctional compound capable of reacting with (A) the base resin, (B) the first polyfunctional compound and (C) the first polyfunctional compound as a means for solving the above problems,
- a pressure-sensitive adhesive composition capable of implementing an interpenetrating network structure in a cured state.
- the present invention is another means for solving the above problems, a polarizing film; And a pressure-sensitive adhesive layer formed on one or both surfaces of the polarizing film and containing a cured product of the pressure-sensitive adhesive composition according to the present invention.
- the present invention provides a liquid crystal display device comprising a liquid crystal panel in which the adhesive polarizing plate according to the present invention is bonded to one side or both sides of a liquid crystal cell.
- the present invention exhibits excellent durability under high temperature and / or high humidity conditions, and has excellent physical properties such as cutting property, re-peelability, and workability, and can effectively suppress light leakage occurring in a liquid crystal display device.
- An adhesive composition can be provided.
- the pressure-sensitive adhesive composition of the present invention can effectively suppress light leakage even when used in a large display device of 20 inches or more.
- This invention contains (A) base resin, (B) 1st polyfunctional compound, and (C) 2nd polyfunctional compound which can react with said 1st polyfunctional compound,
- the present invention relates to an adhesive composition capable of realizing an interpenetrating polymer network (hereinafter, referred to as "IPN") structure in a cured state.
- IPN interpenetrating polymer network
- the present invention also provides a polarizing film; And a pressure-sensitive adhesive layer formed on one or both surfaces of the polarizing film and containing a cured product of the pressure-sensitive adhesive composition according to the present invention.
- the present invention also relates to a liquid crystal display device comprising a liquid crystal panel in which the adhesive polarizing plate of the present invention is bonded to one side or both sides of a liquid crystal cell.
- the pressure-sensitive adhesive composition of the present invention is characterized by forming an IPN structure in a cured state.
- cured state of the adhesive composition as used above means a state in which the composition of the present invention is prepared in the form of an adhesive through a heating or UV irradiation process or the like.
- IPN structure is formed through the reaction of the first and second polyfunctional compounds together with a crosslinked structure (hereinafter sometimes referred to as "first crosslinked structure") in which the pressure-sensitive adhesive is formed of a base resin.
- first crosslinked structure a crosslinked structure
- second crosslinked structure is meant.
- the type of the base resin forming the first crosslinked structure is not particularly limited, and conventional components used in the existing single crosslinked pressure sensitive adhesive may be used without limitation.
- the pressure-sensitive adhesive composition of the present invention may include an acrylic copolymer as the base resin for forming the first crosslinked structure.
- the acrylic copolymer preferably has a weight average molecular weight (M w ) of 1 million or more.
- M w weight average molecular weight
- the weight average molecular weight of the acryl-based copolymer is less than 1 million, there is a fear that the durability is lowered, such as bubbles or peeling phenomenon occurs under high temperature and / or high humidity conditions due to the decrease in cohesive force.
- the acrylic copolymer of this invention is 1 million or more in weight average molecular weight
- the upper limit is not specifically limited.
- the weight average molecular weight is excessively increased, there is a possibility that the coating property may be lowered due to the viscosity increase.
- the weight average molecular weight may be appropriately controlled within the range of about 2.5 million or less.
- the specific composition of the acrylic copolymer used in the present invention is not particularly limited, and includes, for example, 80 parts by weight to 99.8 parts by weight of the (meth) acrylic acid ester monomer and 0.01 parts by weight to 10 parts by weight of the crosslinkable functional group-containing monomer. Copolymers can be used.
- the type of the (meth) acrylic acid ester monomer is not particularly limited, and alkyl (meth) acrylate can be used, for example.
- alkyl (meth) acrylate can be used, for example.
- Examples of such monomers include ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, t-butyl (meth) acrylate, sec- Butyl (meth) acrylate, pentyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-ethylbutyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate , Isononyl (meth) acrylate, lauryl (meth) acrylate, and tetradecyl (meth) acrylate.
- the (meth) acrylic acid ester monomer as described above is preferably included in an amount of 80 parts by weight to 99.8 parts by weight in 100 parts by weight of the acrylic copolymer. If the content is less than 80 parts by weight, there is a fear that the initial adhesive strength of the pressure-sensitive adhesive is lowered, if it exceeds 99.8 parts by weight, there is a fear that a problem in durability due to the decrease in cohesion force.
- the crosslinkable functional group-containing monomers impart a crosslinkable functional group to the acrylic copolymer to provide a crosslinking point for reaction with the multifunctional crosslinking agent, and / or react with the silane coupling agent, and under high temperature and / or high humidity conditions. It may play a role of controlling durability, adhesion and cohesion.
- crosslinkable functional group-containing monomers examples include hydroxy group-containing monomers, carboxyl group-containing monomers, nitrogen-containing monomers and glycidyl group-containing monomers, and in the present invention, one or more of the above can be used.
- Examples of the hydroxy group-containing monomers above include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) Acrylate, 8-hydroxyoctyl (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate or 2-hydroxypropylene glycol (meth) acrylate;
- Examples of the carboxyl group-containing monomers include acrylic acid, methacrylic acid, 2- (meth) acryloyloxy acetic acid, 3- (meth) acryloyloxy propyl acid, 4- (meth) acryloyloxy butyl acid, and acrylic acid double.
- nitrogen-containing monomers examples include 2-isocyanatoethyl (meth) acrylate, 3-isocyanatopropyl (meth) acrylate, 4-isocyanatobutyl (meth) acrylate, (meth) acrylamide , N-vinyl pyrrolidone or N-vinyl caprolactam, and the like, and examples of the glycidyl group-containing monomer include glycidyl (meth) acrylate, but are not limited thereto.
- one kind or a mixture of two or more kinds of the crosslinkable functional group-containing monomers can be used.
- such a crosslinkable functional group-containing monomer needs to be selected in consideration of the kind of the (B) first and (C) second multifunctional compounds.
- the crosslinkable functional group-containing monomer is preferably one of the above-mentioned compounds included in the copolymer from the viewpoint of eliminating the overlapping reaction with the multi-functional compound, if the overlapping reaction can be excluded, heterologous or more is used It may be.
- the crosslinkable functional group-containing monomer is preferably included in an amount of 0.01 to 10 parts by weight in the acrylic copolymer. If the content is less than 0.01 part by weight, the durability reliability under high temperature and / or high humidity conditions may be lowered. If the content is more than 10 parts by weight, the content of the crosslinkable functional group reacting with the crosslinking agent and / or the coupling agent is excessively increased. There exists a possibility that adhesiveness and / or peeling force may fall.
- the acrylic copolymer of the present invention may also be further copolymerized with a functional monomer represented by the following formula (1).
- a functional monomer represented by the following formula (1) Such functional monomers may be added for the purpose of controlling the glass transition temperature of the pressure-sensitive adhesive and providing other functionalities.
- R 1 to R 3 each independently represent hydrogen or alkyl, and R 4 represents cyano; Phenyl unsubstituted or substituted with alkyl; Acetyloxy; Or COR 5, wherein R 5 represents amino unsubstituted or substituted with alkyl or alkoxyalkyl.
- Alkyl or alkoxy in the definition of R1 to R5 in the above formula means alkyl or alkoxy having 1 to 8 carbon atoms, preferably methyl, ethyl, methoxy, ethoxy, propoxy or butoxy.
- the method for producing the acrylic copolymer including the respective components is not particularly limited, and for example, may be prepared through a general polymerization method such as solution polymerization, photopolymerization, bulk polymerization, suspension polymerization or emulsion polymerization.
- a solution polymerization method it is particularly preferable to use a solution polymerization method, and solution polymerization is preferably performed at a polymerization temperature of 50 ° C to 140 ° C by mixing an initiator in a state where each monomer is uniformly mixed.
- Initiators which can be used at this time include azo polymerization initiators such as azobis isobutyronitrile or azobiscyclohexane carbonitrile; And / or conventional initiators such as peroxides such as benzoyl peroxide or acetyl peroxide.
- azo polymerization initiators such as azobis isobutyronitrile or azobiscyclohexane carbonitrile
- initiators such as peroxides such as benzoyl peroxide or acetyl peroxide.
- polyfunctional alcohol compound in the above 4-amino-4- (3-hydroxypropyl) -1,7-heptanediol (4-amino-4- (3-hydroxypropyl) -1,7-heptanediol) , 1,5-dihydroxy anthraquinone, 1-2-benzenedimethanol, 1,2,4-benzenetriol (1,2,4- benzenetriol), 2-benzyloxy-1,3-propanediol, 2,2-biphenyldimethanol, 2,2-bipyridine- 3,3-diol (2,2'-bipyridine-3,3'-diol), 2,2-bisbromomethyl-1,3-propanediol (2,2-bis (bromomethyl) -1,3- propanediol), 1- [N, N-bis (2-hydroxyethyl) amino] -2-propanol (1- [N, N-Bis (2-hydroxyethyl) amino] -2-propanol (1
- polyfunctional carboxylic acid compound examples include 1,3-acetonedicarboxylic acid (1,3-acetonedicarboxylic acid). ), 1,3-adamantanediacetic acid, 1,3-adamantanedicarboxylic acid, azelaic acid, benzylmalonic acid , Biphenyl-4,4'-dicarboxylic acid, 2,2-bipyridine-4,4-dicarboxylic acid (2,2'-bipyridine-4,4'-dicarboxylic acid) ), 2,2-bipyridine-4,4-dicarboxylic acid, 2,2'-bipyridine-4,4'-dicarboxylic acid, bis (carboxymethyl) trithiocarbonate, 2- 2-bromoterephthalic acid, 5-tert-butylisophthalic acid, butylmalonic acid, 1,2,3,4-butanetetracarboxylic acid (1,2, 3,4-butanetetracarboxylic acid or diethylenetriaminepentaace
- the polyfunctional silicone compound include 1,4-bis [dimethyl [2- (5-norbornene-2-yl) ethyl] silyl] benzene (1, 4-Bis [dimethyl [2- (5-norbornen-2-yl) ethyl] silyl] benzene), 1,3-dicyclohexyl-1,1,3,3-tetrakis (dimethylsilyloxy) disiloxane ( 1,3-Dicyclohexyl-1,1,3,3-tetrakis (dimethylsilyloxy) disiloxane, 1,3-dicyclohexyl-1,1,3,3-tetrakis (dimethylvinylsilyloxy) disiloxane (1, 3-Dicyclohexyl-1,1,3,3-tetrakis (dimethyl
- the (B) and (C) multifunctional compounds among the above-mentioned compounds in consideration of the crosslinkable functional group contained in the base resin, the kind of the crosslinking agent used, and the specific reactivity between the multifunctional compounds, etc.
- One or more compound can be selected and used.
- such polyfunctional monomers of (A) and (B) are contained in an adhesive composition in the quantity of 1 weight part-40 weight part with respect to 100 weight part of base resins, respectively. If the content is less than 1 part by weight, there is a fear that the IPN structure is not implemented efficiently, if it exceeds 40 parts by weight, the curing reaction proceeds excessively, there is a fear that the adhesive force is excessively lowered.
- the pressure-sensitive adhesive composition of the present invention may further include a multifunctional crosslinking agent capable of reacting with the base resin together with the above-described components to adjust the adhesion and cohesion and to impart a first crosslinked structure in the pressure-sensitive adhesive.
- crosslinking agent that can be used in the present invention is not particularly limited, and for example, a general crosslinking agent such as an isocyanate compound, an epoxy compound, an aziridine compound and a metal chelate compound can be used.
- Examples of the isocyanate compound include tolylene diisocyanate, xylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isoform diisocyanate, tetramethylxylene diisocyanate, naphthalene diisocyanate and any one of the above polyols (ex One or more selected from the group consisting of reactants with trimethylol propane);
- Examples of epoxy compounds include ethylene glycol diglycidyl ether, triglycidyl ether, trimethylolpropane triglycidyl ether, N, N, N'N 'tetraglycidyl ethylenediamine and glycerin diglycidyl ether.
- aziridine-based compounds include N, N 'toluene-2,4-bis (1-aziridinecarboxamide), N, N'diphenylmethane-4,4-bis (1-aziridinecarboxamide), And one or more selected from the group consisting of triethylene melamine, bisisoprotaloyl-1- (2-methylaziridine) and tri-1-aziridinylphosphineoxide.
- examples of the metal chelate-based compound may be a compound in which a polyvalent metal such as aluminum, iron, zinc, tin, titanium, antimony, magnesium, and / or vanadium is coordinated with acetyl acetone, ethyl acetoacetate, or the like. It is not limited.
- the crosslinking agent is preferably controlled so that the crosslinking reaction of the functional group does not proceed when the pressure-sensitive adhesive layer is formed. That is, the crosslinking agent forms a crosslinked structure in the drying and aging process after the coating operation, thereby improving cohesion, and thus, adhesive properties and cuttability of the adhesive product may be improved.
- Such a multifunctional crosslinking agent is preferably included in an amount of 0.1 parts by weight to 5 parts by weight based on 100 parts by weight of the base resin described above. If the content is less than 0.1 part by weight, the crosslinking reaction may not proceed well, and the cohesive force of the pressure-sensitive adhesive may be lowered. If the content is more than 5 parts by weight, the crosslinking reaction may proceed excessively, resulting in delamination or lifting. There is a fear that the reliability is lowered.
- the pressure-sensitive adhesive composition of the present invention may also further include a silane coupling agent in addition to the aforementioned components.
- a silane coupling agent improves adhesion and adhesion stability between the pressure-sensitive adhesive composition and the glass substrate of the present invention, improves heat resistance and moisture resistance, and also improves adhesion reliability when the adhesive is left for a long time under high temperature and / or high temperature and high humidity conditions. It works to improve.
- the silane coupling agent which has an acetoacetate group or (beta) -cyanoacetyl group as a silane coupling agent of the specific structure which can react with the crosslinkable functional group which the base resin mentioned above contains.
- Such coupling agents include ⁇ -acetoacetate propyl trimethoxy silane, ⁇ -acetoacetate propyl triethoxy silane, ⁇ -cyanoacetyl trimethoxy silane, ⁇ -cyanoacetyl triethoxy silane, and the like.
- a silane coupling agent is preferably included in the composition in an amount of 0.01 to 5 parts by weight, and more preferably 0.01 to 1 part by weight based on 100 parts by weight of the base resin. If the content is less than 0.01 part by weight, the effect of increasing the adhesive force may be insignificant. If the content is more than 5 parts by weight, the durability may be lowered, such as bubble or peeling phenomenon.
- the pressure-sensitive adhesive composition of the present invention may further include 1 part by weight to 100 parts by weight of a tackifying resin with respect to 100 parts by weight of the base resin from the viewpoint of adjusting the adhesion performance.
- a tackifying resin is not specifically limited, For example, (hydrogenated) hydrocarbon type resin, (hydrogenated) rosin resin, (hydrogenated) rosin ester resin, (hydrogenated) terpene resin, (hydrogenated) terpene phenol resin, One kind or a mixture of two or more kinds of a polymeric rosin resin or a polymeric rosin ester resin can be used. If the content of the tackifying resin is less than 1 part by weight, the effect of addition may be insignificant. If it exceeds 100 parts by weight, the compatibility and / or cohesion improvement effect may be lowered.
- the pressure-sensitive adhesive composition of the present invention may also include at least one additive selected from the group consisting of epoxy resins, curing agents, ultraviolet stabilizers, antioxidants, colorants, reinforcing agents, fillers, antifoaming agents, surfactants, and plasticizers, in a range that does not affect the effects of the invention. It may further include.
- the present invention also provides a polarizing film
- the present invention relates to an adhesive polarizing plate formed on one or both surfaces of the polarizing film and including an adhesive layer containing a cured product of the above-described pressure-sensitive adhesive composition.
- the kind of polarizing film or polarizing element constituting the pressure-sensitive adhesive polarizing plate of the present invention is not particularly limited.
- said polarizing film the film manufactured by extending
- polyvinyl alcohol-based resin polyvinyl alcohol, polyvinyl formal, polyvinyl acetal or saponified product of ethylene vinyl acetate copolymer may be used.
- the thickness of the polarizing film is also not particularly limited, and may be formed in a conventional thickness.
- the pressure-sensitive adhesive polarizing plate of the present invention there is also a cellulose film such as triacetyl cellulose on one side or both sides of the polarizing film; Polyester film such as polycarbonate film or polyethylene terephthalate film; Polyether sulfone-based film; And / or a protective film such as a polyethylene film, a polypropylene film, or a polyolefin film having a cyclo or norbornene structure or a polyolefin film such as an ethylene propylene copolymer.
- the thickness of the protective film is also not particularly limited, and may be formed in a conventional thickness.
- the method for forming the pressure-sensitive adhesive layer on the polarizing film as described above is not particularly limited, and for example, a method of applying, drying and curing the pressure-sensitive adhesive to the film with a bar coater or the like, or applying the pressure-sensitive adhesive to the surface of the peelable substrate once After drying, the pressure-sensitive adhesive layer can be transferred onto the surface of the polarizing film using the above peelable base material to be aged and cured.
- the present invention it is preferable to use after removing the bubble-inducing components such as volatile components or reaction residues inside the composition when forming the pressure-sensitive adhesive layer. If the crosslinking density or molecular weight is too low and the modulus of elasticity falls, there is a concern that small bubbles existing between the glass plate and the pressure-sensitive adhesive layer in the high temperature state become large to form scatterers therein.
- the pressure-sensitive adhesive layer of the present invention as described above preferably has a gel content of 80% to 99%, more preferably 90% to 99% represented by the following general formula (1).
- A represents the mass of the pressure-sensitive adhesive
- B represents the dry mass of the insoluble fraction of the pressure-sensitive adhesive after 48 hours immersed in ethyl acetate at room temperature.
- the gel content is less than 80%, the durability and reliability may be lowered under high temperature and / or high humidity conditions. If the gel content is more than 99%, the stress relaxation characteristics of the pressure-sensitive adhesive may be lowered.
- the polarizing plate of the present invention may further include at least one functional layer selected from the group consisting of a protective layer, a reflective layer, an antiglare layer, a retardation plate, a wide viewing angle compensation film, and a brightness enhancing film, and contains an adhesive composition according to the present invention.
- An adhesive may be attached to each of the functional layers.
- the present invention also relates to a liquid crystal display device comprising a liquid crystal panel in which the above-described adhesive polarizing plate according to the present invention is bonded to one side or both sides of a liquid crystal cell.
- the type of liquid crystal cell constituting the liquid crystal display device of the present invention as described above is not particularly limited, such as TN (Twisted Neumatic), STN (Super Twisted Neumatic), IPS (In Plane Switching) or VA (Vertical Alignment) method It includes all common liquid crystal cells.
- the kind and other manufacturing method of the other structure contained in the liquid crystal display device of this invention are not specifically limited, either, The general structure of this field can be employ
- a monomer mixture comprising 99 parts by weight of n-butyl acrylate (BA) and 1.0 part by weight of hydroxyethyl acrylate was introduced into a 1 L reactor equipped with a refrigeration system for easy reflux of nitrogen gas and then as a solvent. 120 parts by weight of ethyl acetate (EAc) was added. Thereafter, after purging nitrogen gas for 60 minutes to remove oxygen, 0.03 parts by weight of azobisisobutyronitrile (AIBN), which is a reaction initiator, was added while keeping the temperature at 60 ° C, and for 8 hours. Reacted.
- AIBN azobisisobutyronitrile
- the reaction mixture was diluted with ethyl acetate (EAc) to prepare an acrylic copolymer having a solid content of 15% by weight, a weight average molecular weight of 1.6 million, and a molecular weight distribution of 4.9.
- EAc ethyl acetate
- the coating solution prepared above was dried on a polyethylene terephthalate (PET, MRF-38, Mitsubishi (made)) film having a thickness of 38 ⁇ m treated with a release sheet, and then coated to have a thickness of 25 ⁇ m, and then in an oven at 110 ° C. Drying for 3 minutes to prepare a pressure-sensitive adhesive layer. Subsequently, the dried pressure-sensitive adhesive layer was stored in a constant temperature and humidity room for about 1 day (23 ° C., 55% relative humidity), and then laminated on a WV coating layer of a polarizing plate coated with a WV (wide view) liquid crystal layer on one side thereof, and then an adhesive polarizing plate. Was prepared.
- An acrylic copolymer was prepared in the same manner as in Example 1, except that raw materials as shown in Table 1 were used to prepare the copolymer (acrylic copolymer A in Table 1 was prepared in Example 1 Same as coalescence).
- a pressure-sensitive adhesive composition was prepared in the same manner as in Example 1, except that the components as shown in Table 2 were mixed at the time of preparing the coating solution.
- the prepared pressure-sensitive adhesive layer was left in a constant temperature and humidity chamber (23 ° C., 60% RH) for about 7 days, and then about 0.3 g of pressure-sensitive adhesive was placed in a stainless steel 200 mesh wire mesh, and then immersed in ethyl acetate (100 ml), and dark at room temperature. Stored for 3 days at. Subsequently, the insoluble fraction was separated and dried in an oven at 70 ° C. for 4 hours to measure mass, and then the gel fraction was measured using it.
- the prepared pressure-sensitive adhesive polarizing plate was cut into a size of 25 mm ⁇ 100 mm (width ⁇ length) to prepare a sample, and after removing the release sheet, it was attached to an alkali-free glass using a laminator. It was then compressed for about 20 minutes in an autoclave (50 ° C., 0.5 atmosphere) and stored for 24 hours in constant temperature and humidity conditions (23 ° C., 50% RH). Then, using a physical property analyzer (Texture analyzer, British Stable Microsystem), the adhesive force was measured under conditions of a peel rate of 300 mm / min and 180 ° peel angle, and through this to evaluate the re-peelability.
- a physical property analyzer Texture analyzer, British Stable Microsystem
- Samples were prepared by cutting the prepared adhesive polarizer to a size of 90 mm ⁇ 170 mm (width ⁇ length), and the light absorption side was double-sided on a glass substrate (110 mm ⁇ 190 mm ⁇ 0.7 mm: width ⁇ length ⁇ thickness). Attached in a crossed state. At this time, the pressure applied was about 5 kg / cm 2 to work in a clean room to prevent bubbles or foreign matter.
- the specimens were left for 1,000 hours at a temperature of 60 ° C. and a relative humidity of 90%, and then observed whether bubbles or peelings occurred. The heat resistance was observed for the occurrence of bubbles and peeling after standing for 1,000 hours at a temperature of 80 °C. Immediately after evaluating the state of the specimen was left at room temperature for 24 hours, the evaluation was performed, and the evaluation criteria were as follows.
- the evaluation of light transmission uniformity was carried out using the same specimen as in the durability reliability evaluation.
- a polarizer with an adhesive layer was attached to a 22-inch monitor (LG Philips LCD), stored for 1 day in a constant temperature and humidity condition, and then left in an oven at 80 ° C. for 200 hours.
- the light transmission uniformity of the periphery and center part of four square sides of a monitor was evaluated.
- the IPN including the first crosslinked structure implemented by the reaction of the base resin (acrylic copolymer) and the crosslinking agent and the second crosslinked structure implemented by the reaction between the polyfunctional compound, IPN
- Examples 1 to 6 of the present invention having a structure, it was found that not only the physical properties related to adhesion, re-peelability and durability, but also light leakage phenomenon can be effectively suppressed when applied to the liquid crystal display device. .
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Abstract
Description
Claims (19)
- (A) 베이스 수지, (B) 제 1 다관능성 화합물 및 (C) 상기 제 1 다관능성 화합물과 반응할 수 있는 제 2 다관능성 화합물을 포함하고,경화 상태에서 상호침투 네트워크 구조를 구현할 수 있는 점착제 조성물.
- 제 1 항에 있어서, (A) 베이스 수지가 중량평균분자량(Mw)이 100만 이상인 아크릴계 공중합체인 것을 특징으로 하는 점착제 조성물.
- 제 2 항에 있어서, 아크릴계 공중합체가 (메타)아크릴산 에스테르계 단량체 80 중량부 내지 99.8 중량부 및 가교성 관능기 함유 단량체 0.01 중량부 내지 10 중량부를 포함하는 것을 특징으로 하는 점착제 조성물.
- 제 3 항에 있어서, (메타)아크릴산 에스테르계 단량체가 에틸 (메타)아크릴레이트, n-프로필 (메타)아크릴레이트, 이소프로필 (메타)아크릴레이트, n-부틸 (메타)아크릴레이트, t-부틸 (메타)아크릴레이트, sec-부틸 (메타)아크릴레이트, 펜틸 (메타)아크릴레이트, 2-에틸헥실 (메타)아크릴레이트, 2-에틸부틸 (메타)아크릴레이트, n-옥틸 (메타)아크릴레이트, 이소옥틸 (메타)아크릴레이트, 이소노닐 (메타)아크릴레이트, 라우릴 (메타)아크릴레이트 및 테트라데실 (메타)아크릴레이트로 이루어진 군으로부터 선택된 하나 이상인 것을 특징으로 하는 점착제 조성물.
- 제 3 항에 있어서, 가교성 관능기 함유 단량체가 히드록시기 함유 단량체, 카복실기 함유 단량체, 질소 함유 단량체 또는 글리시딜기 함유 단량체인 것을 특징으로 하는 점착제 조성물.
- 제 1 항에 있어서, 다관능성 화합물이 다관능성 알코올계 화합물, 다관능성 카복실산계 화합물, 다관능성 무수물계 화합물, 다관능성 아민계 화합물, 다관능성 글리시딜계 화합물, 다관능성 이소시아네이트계 화합물 및 다관능성 실리콘 화합물로 이루어진 군으로부터 선택된 하나 이상인 것을 특징으로 하는 점착제 조성물.
- 제 1 항에 있어서, 다관능성 화합물이 4-아미노-4-(3-히드록시프로필)-1,7-헵탄디올, 1,5-디히드록시안트라퀴논,1,2-벤젠디메탄올, 1,2,4-벤젠트리올, 2-벤질옥시-1,3-프로판디올, 2,2 -비페닐디메탄올, 2,2 -비피리딘-3,3 -디올, 2,2-비스브로모메틸-1,3-프로판디올, 1-[N,N-비스(2-히드록시에틸)아미노]-2-프로판올, N,N-비스(2-히드록시에틸)이소니코틴아미드, 비스(2-히드록시에틸)테레프탈레이트, 2,2-비스(히드록시메틸)부티르산, 4-브로모-3,5-디히드록시벤조산, 2-(브로모메틸)-2-(히드록시메틸)-1,3-프로판디올, 3-브로모-1,2-프로판디올, t-부틸히드로퀴논, 클로로히드로귀논, 5-클로로-2,3-피리딘디올, 1,2-시클로헥산디올, 시스,시스-1,3,5-시클로헥산트리올 디히드레이트, 3-시클로헥산-1,1-디메탄올, 시스-1,2-시클로펜탄디올, 1,2-데칸디올, 2,3-디브로모-1,4-부탄디올, 트랜스-2,3-디브로모-2-부텐-1,4-디올, 2,5-디브로모히드로퀴논, 2,3-디클로로-5,8-디히드록시-1,4-나프토퀴논, 디에틸 비스(히드록시메틸)말로네이트, 디에틸 2,5-디히드록시테레프탈레이트, 3,5-디히드록시아세토페논, 4,4 -디히드록시벤조페논, 2,5-디히드록시-1,4-벤조퀴논, 2,2-디히드록시-5-메톡시-1,3-인단디온 히드레이트, 2,6-디히드록시-4-메틸-3-피리딘카보니트릴, 트리스(2-히드록시에틸)이소시아누레이트, 트리스(2-히드록시에틸)이소시아누레이트, 1,1,1-트리스(4-히드록시페닐)에탄, 2,4,6-트리히드록시벤조산, 3,3,3 ,3 -테트라메틸-1,1 -스피로비인단-5,5 ,6,6 -테트라올, N,N,N ,N -테트라키스(2-히드록시프로필)에틸렌디아민, 1,3-아세톤디카복실산, 1,3-아다만탄디아세트산, 1,3-아다만탄디카복실산, 아젤라산, 벤질말론산, 비페닐-4,4 -디카복실산, 2,2 -비피리딘-4,4 -디카복실산, 2,2 -비피리딘-4,4 -디카복실산, 비스(카복시메틸)트리티오카보네이트, 2-브로모테레프탈산, 5-t-부틸이소프탈산, 부틸말론산, 1,2,3,4-부탄테트라카복실산, 디에틸렌트리아민펜타아세트산, 4-아미노-1,8-나프탈산 무수물, 벤조페논-3,3 ,4,4 -테트라카복실산 이무수물, 3,3 ,4,4 -비페닐테트라카복실산 이무수물, 디에틸렌트리아민펜타아세트산 이무수물, 에틸렌디아민테트라아세트산 이무수물, 4,4 -(4,4 -이소프로필리덴디페녹시)비스(프탈산 무수물), 4,4 -옥시디프탈산 무수물, 피로멜리트산 이무수물, 아미노페닐 디술피드, 1,2,4,5-벤젠테트라카복사미드, 4,4 -(1,1 -비페닐-4,4 -디일디옥시)디아닐린, 6-클로로-3,5-디아미도-2-피라진카복사미드, 1,3-시클로헥산비스(메틸아민), 4,4 -디아미노벤자닐라이드, 디아미노벤조페논, 2,6-디아미노푸린, 2,5-디메틸-1,4-페닐렌디아민, 4,4 -(헥사플루오로이소프로필리덴)디아닐린, 3,3 -메틸렌디아닐린, 3,4 -옥시디아닐린, 4,4 -(1,3-페닐렌디옥시)디아닐린, 폴리(1,4-부탄디올)비스(4-아미노벤조에이트), 트리스(2-아미노에틸)아민, p-크실리렌디아민, 1,3-비스(N,N-디글리시딜아미노메틸)시클로헥산, N,N,N N -테트라글리시딜-m-자일렌디아민, 트리글리시딜 이소시아누레이트, 트리스(2-카복시에틸)이소시아누레이트, 비스[4-(글리시딜옥시)페닐]메탄, 1,3-부타디엔 디에폭사이드, 1,4-부탄디올 디글리시딜 에테르, 1,4-시클로헥산디메탄올 디글리시딜 에테르, 디시클로펜타디엔 디옥시드, 디글리시딜 1,2-시클로헥산디카복실레이트, N,N-디글리시딜-4-글리시딜옥시아닐린, 글리세롤 디글리시딜 에테르, 4,4 -메틸렌비스(N,N-디글리시딜아닐린), 레조시놀 디글리시딜 에테르, 트리스(4-히드록시페닐)메탄 트리글리시딜 에테르, 톨리렌 디이소시아네이트, 크실렌 디이소시아네이트, 디페닐메탄 디이소시아네이트, 헥사메틸렌 디이소시아네이트, 이소포름 디이소시아네이트, 테트라메틸크실렌 디이소시아네이트, 나프탈렌 디이소시아네이트, 디이소시아네이트 화합물과 폴리올의 반응물, 1,4-비스[디메틸[2-(5-노르보르넨-2-일)에틸]실릴]벤젠, 1,3-디시클로헥실-1,1,3,3-테트라키스(디메틸실릴옥시)디실록산, 1,3-디시클로헥실-1,1,3,3-테트라키스(디메틸비닐실릴옥시)디실록산, 1,3-디시클로헥실-1,1,3,3-테트라키스[(노르보넨-2-일)에틸디메틸실릴옥시]디실록산, 1,3-디비닐테트라메틸디실록산, 1,1,3,3,5,5-헥사메틸-1,5-비스[2-(5-노르보넨-2-일)에틸]트리실록산, 실라트란글리콜, 1,1,3,3-테트라메틸-1,3-비스[2-(5-노르보넨-2-일)에틸]디실록산, 2,4,6,8-테트라메틸-2,4,6,8-테트라비닐시클로테트라실록산, N-[3-(트리메톡시실릴)프로필]-N -(4-비닐벤질)에틸렌디아민, 6-비스(트리클로로실릴)헥산, 1,6-비스(트리클로로실릴)에탄, 디메틸디아세톡시실란, 메틸트리에톡시실란, 비닐메틸디아세톡시실란, 메틸트리메톡시실란, 에틸트리아세톡시실란, 디메틸테트라메톡시디실록산, 메틸트리아세톡시실란, 테트라에톡시실란, 비닐트리아세톡시실란, 테트라메톡시실란, 실리콘 테트라아세테이트, 테트라프로폭시실란, 디메틸디에톡시실란, 1,1,3,3-테트라메틸-1,3-디에톡시디실록산, 비스(N-메틸벤질아미도) 에톡시메틸실란, 비스(디메틸아미노)디메틸실란, 비스(디메틸아미노)메틸비닐실란, 트리스(디메틸아미노)메틸실란, 트리스(시클로헥실아미노)메틸실란, 비닐트리스(메틸에틸케톡시민)실란, 메틸트리스(메틸에틸케톡심)실란, 비닐트리스(이소프로페녹시)실란, 테트라메틸디실록산, 1,3,5,7-테트라메틸시클로테트라실록산, 메틸히드로시클로실록산, 1,3-디비닐테트라메틸디실록산, 1,3,5-트리비닐-1,1,3,5,5-펜타메틸트리실록산 및 테트라비닐테트라메틸시클로테트라실록산으로 이루어진 군으로부터 선택된 하나 이상인 것을 특징으로 하는 점착제 조성물.
- 제 1 항에 있어서, 다관능성 화합물 (B) 및 (C)는 (A) 베이스 수지 100 중량부에 대하여 각각 1 중량부 내지 40 중량부의 양으로 포함되는 것을 특징으로 하는 점착제 조성물.
- 제 1 항에 있어서, 다관능성 가교제를 추가로 포함하는 것을 특징으로 하는 점착제 조성물.
- 제 10 항에 있어서, 다관능성 가교제는 이소시아네이트계 화합물, 에폭시계 화합물, 아지리딘계 화합물 또는 금속 킬레이트계 화합물인 것을 특징으로 하는 점착제 조성물.
- 제 10 항에 있어서, 다관능성 가교제는 베이스 수지 100 중량부에 대하여 0.1 중량부 내지 5 중량부의 양으로 포함되는 것을 특징으로 하는 점착제 조성물.
- 제 1 항에 있어서, 실란계 커플링제를 추가로 포함하는 것을 특징으로 하는 점착제 조성물.
- 제 1 항에 있어서, 점착성 부여 수지를 추가로 포함하는 것을 특징으로 하는 점착제 조성물.
- 제 1 항에 있어서, 에폭시 수지, 경화제, 자외선 안정제, 산화 방지제, 조색제, 보강제, 충진제, 소포제, 계면 활성제 및 가소제로 이루어진 군으로부터 선택된 하나 이상을 추가로 포함하는 것을 특징으로 하는 점착제 조성물.
- 편광 필름; 및상기 편광 필름의 일면 또는 양면에 형성되고, 제 1 항 내지 제 15 항 중 어느 한 항에 따른 점착제 조성물의 경화물을 함유하는 점착제층을 포함하는 점착 편광판.
- 제 16 항에 있어서, 점착제층은 하기 일반식 1로 표시되는 겔(gel) 함량이 80% 내지 99%인 것을 특징으로 하는 점착 편광판:[일반식 1]겔 함량(%) = B/A × 100상기 일반식 1에서, A는 점착제의 질량을 나타내고, B는 상온에서 에틸 아세테이트로 48 시간 침적 후의 점착제의 불용해분의 건조 질량을 나타낸다.
- 제 16 항에 있어서, 보호층, 반사층, 방현층, 위상차판, 광시야각 보상 필름 및 휘도 향상 필름으로 이루어진 군으로부터 선택된 하나 이상의 기능성층을 추가로 포함하는 것을 특징으로 하는 점착 편광판.
- 제 16 항에 따른 점착 편광판이 액정셀의 일면 또는 양면에 접합되어 있는 액정 패널을 포함하는 액정표시장치.
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CN2009801019252A CN101910345B (zh) | 2008-01-11 | 2009-01-07 | 压敏粘合剂组合物、偏光片和包括该偏光片的液晶显示器 |
EP09700202.6A EP2230287B1 (en) | 2008-01-11 | 2009-01-07 | Pressure-sensitive adhesive compositions, polarizers and liquid crystal displays comprising the same |
JP2010542161A JP5704532B2 (ja) | 2008-01-11 | 2009-01-07 | 粘着剤組成物、これを含む偏光板及び液晶表示装置 |
US12/812,415 US9587147B2 (en) | 2008-01-11 | 2009-01-07 | Pressure-sensitive adhesive compositions, polarizers and liquid crystal displays comprising the same |
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KR10-2008-0120575 | 2008-12-01 |
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EP (1) | EP2230287B1 (ko) |
JP (2) | JP5704532B2 (ko) |
KR (1) | KR101023843B1 (ko) |
CN (1) | CN101910345B (ko) |
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WO (1) | WO2009088213A2 (ko) |
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Also Published As
Publication number | Publication date |
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CN101910345A (zh) | 2010-12-08 |
TWI406922B (zh) | 2013-09-01 |
JP5864508B2 (ja) | 2016-02-17 |
KR101023843B1 (ko) | 2011-03-22 |
JP2014028972A (ja) | 2014-02-13 |
JP2011511852A (ja) | 2011-04-14 |
WO2009088213A3 (ko) | 2009-09-24 |
TW200951192A (en) | 2009-12-16 |
US20110032455A1 (en) | 2011-02-10 |
US9587147B2 (en) | 2017-03-07 |
CN101910345B (zh) | 2013-03-27 |
JP5704532B2 (ja) | 2015-04-22 |
KR20090077664A (ko) | 2009-07-15 |
EP2230287A4 (en) | 2011-01-12 |
EP2230287A2 (en) | 2010-09-22 |
EP2230287B1 (en) | 2013-06-12 |
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