WO2011126262A2 - 터치 패널용 점착제 조성물, 점착필름 및 터치 패널 - Google Patents
터치 패널용 점착제 조성물, 점착필름 및 터치 패널 Download PDFInfo
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- WO2011126262A2 WO2011126262A2 PCT/KR2011/002355 KR2011002355W WO2011126262A2 WO 2011126262 A2 WO2011126262 A2 WO 2011126262A2 KR 2011002355 W KR2011002355 W KR 2011002355W WO 2011126262 A2 WO2011126262 A2 WO 2011126262A2
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- WIPO (PCT)
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- pressure
- sensitive adhesive
- film
- touch panel
- adhesive composition
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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
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
-
- 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
-
- 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
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of 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
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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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
- C09J2301/312—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 parameters being the characterizing feature
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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
- C09J2433/00—Presence of (meth)acrylic polymer
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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
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/14—Layer or component removable to expose adhesive
- Y10T428/1476—Release layer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2878—Adhesive compositions including addition polymer from unsaturated monomer
- Y10T428/2891—Adhesive compositions including addition polymer from unsaturated monomer including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof
Definitions
- the present invention relates to an adhesive composition for a touch panel, an adhesive film, and a touch panel.
- a transparent conductive plastic film is used for light weight and crack prevention.
- a film is based on a polyethylene terephthalate (PET) film, and a conductive layer such as indium tin oxide (ITO) is formed on one surface thereof, and the film is conductive by an adhesive layer. It is laminated
- PET polyethylene terephthalate
- ITO indium tin oxide
- the pressure-sensitive adhesive used for the attachment of the transparent conductive film in a touch screen or a touch panel includes a step absorbency capable of absorbing a printing step by a decor film; Durability that can suppress the occurrence of curls or bubbles when exposed to harsh conditions such as high temperature or high humidity conditions; Cutting ability to suppress squeaking or pressing when cutting; And physical properties such as excellent adhesion or wettability to various substrates, and various physical properties such as cohesion.
- body parts such as the hands or the face during actual use, resistance to sebum secreted from the body parts, that is, chemical resistance, is also required for the adhesive.
- An object of the present invention is to provide an adhesive composition for a touch panel, an adhesive film and a touch panel.
- the present invention is a means for solving the above problems, acrylic resin; And it provides a pressure-sensitive adhesive composition for a touch panel comprising a multifunctional crosslinking agent, satisfying the conditions of the general formulas (1) and (2).
- X 1 represents the gel content of the pressure-sensitive adhesive which is a cured product of the pressure-sensitive adhesive composition
- X 2 adheres one side of the pressure-sensitive adhesive which is a cured product of the pressure-sensitive adhesive composition to the ITO surface of the polyethylene terephthalate film having the ITO surface. And, after attaching the opposite side of the pressure-sensitive adhesive on the SUS surface, it is left for 24 hours at room temperature, and then the high temperature shear strength measured at a crosshead speed of 5 mm / min at a temperature of 100 °C.
- the present invention is another means for solving the above problems, a base film; And a pressure-sensitive adhesive layer formed on one or both surfaces of the base film and having a pressure-sensitive adhesive layer containing a cured product of the pressure-sensitive adhesive composition according to the present invention.
- the present invention is another means for solving the above problems, the upper conductive film is formed with a conductive layer on one surface; A lower conductive film having a conductive layer formed on one surface thereof and disposed such that the conductive layer faces away from the conductive layer of the upper conductive film; And attaching the upper and lower conductive films at each edge portion of the upper and lower conductive films, and having a pressure-sensitive adhesive layer including the pressure-sensitive adhesive composition according to the present invention.
- This invention can provide the adhesive for touch panels which is excellent in chemical resistance, durability in high temperature, or high humidity conditions, and excellent in wettability or adhesiveness with respect to various to-be-adhered bodies. Moreover, when this invention is applied to a touchscreen, it can provide the adhesive which can effectively prevent corrosion of an electrode etc., maintaining the resistance performance of a conductive layer excellently.
- FIG. 1 is a view showing a cross-sectional view of an adhesive film according to an aspect of the present invention.
- FIG. 2 is a view showing a cross-sectional view of an adhesive film according to another aspect of the present invention.
- FIG. 3 is a diagram exemplarily illustrating a touch panel configured according to an aspect of the present invention.
- FIG. 4 is a diagram exemplarily illustrating a touch panel configured according to another aspect of the present invention.
- FIG. 5 is a diagram exemplarily illustrating a touch panel configured according to another aspect of the present invention.
- the present invention acrylic resin; And multifunctional crosslinking agents,
- X 1 represents the gel content of the pressure-sensitive adhesive which is a cured product of the pressure-sensitive adhesive composition
- X 2 adheres one side of the pressure-sensitive adhesive which is a cured product of the pressure-sensitive adhesive composition to the ITO surface of the polyethylene terephthalate film having the ITO surface.
- SUS Steel Use Stainless
- the pressure-sensitive adhesive composition according to the present invention comprises an acrylic resin and a polyfunctional crosslinking agent, and the gel content satisfies the condition of the general formula (1).
- the gel content (X 1 ) of the general formula 1 can be measured according to the following general formula (3).
- A represents the mass of the pressure-sensitive adhesive
- B is immersed in the ethyl acetate at room temperature for 48 hours, and then the insoluble fraction is collected, and after removing the ethyl acetate from the insoluble fraction measured The dry mass of insoluble content is shown.
- the gel content may be specifically measured in the following manner. First, after manufacturing an adhesive with the adhesive composition of this invention, an adhesive is extract
- the pressure-sensitive adhesive prepared from the pressure-sensitive adhesive composition of the present invention may have a gel content of 55 (%) or less, preferably 50 (%) or less, more preferably 45 (%) or less, even more preferably 30 (%) or less. have.
- the gel content of the pressure-sensitive adhesive by controlling the gel content of the pressure-sensitive adhesive to 55 (%) or less, especially in the application to the touch panel, the wettability or adhesion to various adherends, maintaining the resistance performance of the conductive layer, corrosion resistance to the electrode layer and An adhesive excellent in chemical resistance such as sebum resistance can be provided.
- the minimum of the gel content of an adhesive is not specifically limited, Preferably it is 5% or more, More preferably, it may be 10% or more.
- the pressure-sensitive adhesive composition of the present invention further satisfies the condition of the general formula (2). That is, the pressure-sensitive adhesive of the present invention may be 20 Kg / in 2 or more, preferably 25 Kg / in 2 or more high temperature shear strength measured at 100 °C.
- the method for measuring the high temperature shear strength of the pressure-sensitive adhesive is not particularly limited, and can be measured, for example, in the following manner.
- a pressure-sensitive adhesive is prepared from the pressure-sensitive adhesive composition of the present invention, and the pressure-sensitive adhesive is cut to a size of 1 in ⁇ 1 in (horizontal ⁇ vertical) to prepare a specimen.
- one surface of the specimen is attached to the ITO surface of the polyethylene terephthalate film having the ITO surface, and the opposite surface of the specimen is attached to the SUS surface, and then left at room temperature for 24 hours.
- the high temperature shear strength can then be measured in a 100 ° C. oven at a crosshead speed of 5 mm / min using a UTM (Universal Testing Machine, Zwick). More specifically, the high temperature shear strength can be measured according to the method for measuring the physical properties of the high temperature shear strength described in the Examples herein.
- the present invention by controlling the high-temperature shear strength of the pressure-sensitive adhesive to 20 Kg / in 2 or more, especially in the application to the touch panel, wetting or adhesion to various adherends, maintaining the resistance performance of the conductive layer, corrosion resistance to the electrode layer And an adhesive having excellent chemical resistance, such as sebum resistance.
- the upper limit of the high temperature shear strength in the present invention is not particularly limited, for example, 70 Kg / in 2 or less, preferably 60 Kg / in 2 or less, more preferably 50 Kg / in 2 or less can do.
- the acrylic resin used in the present invention may have a weight average molecular weight of 1 million or more, preferably 1.5 million or more.
- the weight average molecular weight means a polystyrene conversion value measured by GPC (gel permeation chromatography).
- GPC gel permeation chromatography
- the upper limit of the weight average molecular weight of the acrylic resin is not particularly limited, but may be controlled in the range of 3 million or less, preferably 2.5 million or less, in consideration of coating properties and the like.
- the glass transition temperature of the acrylic resin may be -60 °C or more, preferably -55 °C or more.
- an acrylic resin having a glass transition temperature of -60 ° C. or more can be used to provide an adhesive having excellent physical properties including wettability and adhesion to various adherends.
- the upper limit of the glass transition temperature of the acrylic resin is not particularly limited.
- the upper limit of the glass transition temperature can be controlled in the range of -10 ° C or lower, preferably -20 ° C or lower.
- the specific composition of the acrylic resin that can be used in the present invention is not particularly limited.
- the polymer of the monomer mixture containing a (meth) acrylic acid ester monomer and a crosslinkable monomer can be used as acrylic resin, for example.
- the kind of (meth) acrylic acid ester monomer that can be used in the present invention is not particularly limited, and for example, alkyl (meth) acrylate can be used.
- alkyl (meth) acrylate can be used.
- the alkyl group contained in the monomer is too long, the cohesive force of the cured product may be lowered, and the glass transition temperature and the adhesiveness may become difficult to control.
- alkyl group having 1 to 14 carbon atoms, preferably 1 to 8 carbon atoms Alkyl (meth) acrylates having Examples of such monomers include methyl (meth) acrylate, 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, isobonyl (meth) acrylate, isononyl (meth) acrylate, etc. are mentioned, In the present invention, a mixture of one or more of the present invention
- the crosslinkable monomer included in the monomer mixture means a monomer having a copolymerizable functional group (eg, carbon-carbon double bond) and a crosslinkable functional group in the molecular structure at the same time, and the monomer may be a polyfunctional crosslinking agent in the polymer.
- the crosslinkable functional group which can react can be provided.
- crosslinkable monomer examples include a hydroxy group-containing monomer, a carboxyl group-containing monomer or a nitrogen-containing monomer, and among these, one kind or a mixture of two or more kinds thereof 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, 2-hydroxypropylene glycol (meth) acrylate, and the like;
- 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 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, but are not limited thereto.
- the monomer mixture is 80 parts by weight to 99.9 parts by weight of the (meth) acrylic acid ester monomer and 0.1 parts by weight to 20 parts by weight of the crosslinkable monomer, preferably 90 parts by weight to 99.9 parts by weight of the (meth) acrylic acid ester monomer. Parts and 0.1 parts by weight to 20 parts by weight of the crosslinkable monomer.
- the pressure-sensitive adhesive having excellent reliability, handleability, durability and re-peelability, which can effectively suppress the occurrence of peeling or lifting due to the decrease in initial adhesion Can be provided.
- a unit "weight part” means a "weight ratio.”
- the monomer mixture may further include a comonomer represented by the following formula (1) for glass transition temperature control and other functional provision.
- R 1 to R 3 each independently represent hydrogen or alkyl, and R 4 is cyano; Phenyl unsubstituted or substituted with alkyl; Acetyloxy; Or COR 5 , wherein R 5 represents amino or glycidyloxy unsubstituted or substituted with alkyl or alkoxyalkyl.
- Alkyl or alkoxy in the definition of R 1 to R 5 in the above formula means alkyl or alkoxy having 1 to 8 carbon atoms, preferably methyl, ethyl, methoxy, ethoxy, propoxy or butoxy.
- the content thereof is preferably 20 parts by weight or less relative to the content of the (meth) acrylic acid ester monomer or the crosslinkable monomer. In the present invention, when the content exceeds 20 parts by weight, there is a fear that the flexibility and / or peeling force is lowered.
- the method of polymerizing the monomer mixture containing each component mentioned above and manufacturing acrylic resin is not specifically limited.
- general polymerization methods such as solution polymerization, photopolymerization, bulk polymerization, suspension polymerization or emulsion polymerization can be used.
- it is particularly preferable to produce an acrylic resin using a solution polymerization method but is not limited thereto.
- the pressure-sensitive adhesive composition of the present invention may include a multifunctional crosslinking agent and adjust cohesion or adhesive properties of the cured product according to the amount of the multifunctional crosslinking agent used.
- the kind of 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.
- a general crosslinking agent such as an isocyanate compound, an epoxy compound, an aziridine compound and a metal chelate compound
- the isocyanate compound include tolylene diisocyanate, xylene diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate, isoborone diisocyanate, tetramethylxylene diisocyanate, naphthalene diisocyanate, and one or more isocyanate compounds.
- Trimethylol propane examples include ethylene glycol diglycidyl ether, triglycidyl ether, trimethylolpropane triglycidyl ether, N, N, N ', N'-tetraglycidyl ethylenediamine and glycerin diglycidyl ether.
- aziridine compounds include N, N'-toluene-2,4-bis (1-aziridinecarboxamide), N, N'-diphenylmethane-4,4'-bis (1-aziridinecarboxes) Mid), triethylene melamine, bisisoprotaloyl-1- (2-methylaziridine), and tri-1-aziridinylphosphine oxide.
- 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 multifunctional crosslinking agent may be included in an amount of 0.01 to 10 parts by weight, preferably 0.01 to 5 parts by weight, based on 100 parts by weight of the acrylic resin.
- the content of the crosslinking agent when the content of the crosslinking agent is less than 0.01 part by weight, the cohesive force of the cured product may be deteriorated and bubbles may be generated at high temperature.
- the content of the crosslinking agent is more than 10 parts by weight, the adhesiveness and peeling force of the adhesive are too high, and the interlayer foil Durability may be lowered, such as lifting or lifting.
- the pressure-sensitive adhesive composition of the present invention may also include a silane coupling agent in addition to the aforementioned components.
- a silane coupling agent can improve the adhesion and adhesion stability between the cured product and the adherend, thereby improving heat resistance and moisture resistance, and also improving the adhesion reliability when the cured product is left for a long time under high temperature and / or high humidity.
- silane coupling agent which can be used by this invention is not specifically limited, For example, (gamma)-glycidoxy propyl trimethoxy silane, (gamma)-glycidoxy propylmethyl diethoxy silane, (gamma)-glycidoxy propyl tree.
- the silane coupling agent may be included in the composition in an amount of 0.005 parts by weight to 5 parts by weight based on 100 parts by weight of the acrylic resin. If the content is less than 0.005 parts by weight, there is a fear that the effect of increasing the adhesive strength is insignificant, if it exceeds 5 parts by weight, there is a fear that the durability and reliability, such as bubbles or peeling phenomenon occurs.
- the pressure-sensitive adhesive composition of the present invention may further include a tackifying resin from the viewpoint of adjusting the adhesion performance.
- the kind of tackifying resin which can be used by this invention is not specifically limited, For example, Hydrocarbon-type resin or its hydrogenated substance; Rosin resins or their hydrogenated materials; Rosin ester resins or hydrogenated substances thereof; Terpene resins or hydrogenated substances thereof; Terpene phenol resins or hydrogenated substances thereof; One kind or a mixture of two or more kinds of a polymeric rosin resin or a polymeric rosin ester resin can be used.
- the tackifying resin may be included in an amount of 1 part by weight to 100 parts by weight with respect to 100 parts by weight of the acrylic resin. If the content 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 contain at least one additive selected from the group consisting of epoxy resins, crosslinkers, ultraviolet stabilizers, antioxidants, colorants, reinforcing agents, fillers, antifoaming agents, surfactants, and plasticizers. It may further include a.
- the invention also, the base film; And a pressure-sensitive adhesive layer formed on one or both surfaces of the base film and including a cured product of the pressure-sensitive adhesive composition according to the present invention.
- FIG. 1 is a view showing a cross-sectional view of the adhesive film 10 according to an aspect of the present invention.
- Adhesive film 10 of the present invention as shown in Figure 1, the base film 11; And an adhesive layer 12 formed on both surfaces of the base film 11.
- the adhesive film of FIG. 1 is only one example of the present invention. That is, in the adhesive film of this invention, an adhesive layer may be formed only in one surface of a base film, and if necessary, only a sheet-like adhesive layer may be included without a base film.
- the method of curing the pressure-sensitive adhesive composition to produce the pressure-sensitive adhesive layer is not particularly limited.
- an adhesive layer can be manufactured by the method of apply
- the curing process is preferably performed after sufficiently removing the bubble-inducing components such as volatile components or reaction residues contained in the pressure-sensitive adhesive composition or coating liquid.
- the crosslinking density or molecular weight of the pressure-sensitive adhesive is too low, the elastic modulus is lowered, and bubbles present at the pressure-sensitive interface in the high temperature state become large, thereby preventing problems such as forming scattering bodies therein.
- the method of curing the pressure-sensitive adhesive composition or the coating liquid is not particularly limited, and, for example, a curing process may be performed through a process of applying appropriate heat to the coating layer or aging under predetermined conditions.
- the pressure-sensitive adhesive layer formed as described above may have a thickness of 20 ⁇ m to 150 ⁇ m, preferably 20 ⁇ m to 100 ⁇ m.
- the thickness of the pressure-sensitive adhesive layer in the above-described range, it is possible to apply to a thin touch panel or a touch screen, while providing an adhesive film excellent in chemical resistance, adhesion, wettability, resistance retention and corrosion resistance of the electrode, etc. can do.
- a specific kind of the base film is not particularly limited, and for example, a general plastic film in this field may be used.
- the base film polyethylene terephthalate film, polytetrafluoroethylene film, polyethylene film, polypropylene film, polybutene film, polybutadiene film, vinyl chloride copolymer film, polyurethane film, ethylene -Vinyl acetate film, ethylene-propylene copolymer film, ethylene-ethyl acrylate copolymer film, ethylene-methyl acrylate copolymer film, polyimide film and the like can be used.
- polyethylene terephthalate film may be used, but is not limited thereto.
- the base film may have a thickness of 5 ⁇ m to 50 ⁇ m, preferably 10 ⁇ m to 30 ⁇ m.
- the thickness of the base film in the above range, while being applicable to a thin touch panel or touch screen, it provides an adhesive film excellent in chemical resistance, adhesiveness, wettability, resistance performance retention and corrosion resistance of the electrode, etc. can do.
- the pressure-sensitive adhesive film of the present invention may further include a release film formed on the pressure-sensitive adhesive layer as needed.
- FIG. 2 is a cross-sectional view showing an adhesive film 20 according to another aspect of the present invention.
- the adhesive film 20 of the present invention as shown in Figure 2, the base film 11; An adhesive layer 12 formed on both sides of the base film 11; And release films 21a and 21b formed on the pressure-sensitive adhesive layer 12.
- the specific kind of the release film that can be used in the present invention is not particularly limited.
- an appropriate release treatment may be performed on one surface of various plastic films used as the above-described base film, for example, to be used as a release film.
- examples of the release agent used for the release treatment include alkyd-based, silicone-based, fluorine-based, unsaturated ester-based, polyolefin-based or wax-based release agents. Preferably, but not limited thereto.
- the thickness of the release film is not particularly limited, and may be appropriately selected depending on the intended use.
- the thickness of the release film may be about 10 ⁇ m to 100 ⁇ m, preferably about 30 ⁇ m to 90 ⁇ m, and more preferably about 40 ⁇ m to 80 ⁇ m.
- the present invention also includes an upper conductive film having a conductive layer formed on one surface thereof; A lower conductive film having a conductive layer formed on one surface thereof and disposed such that the conductive layer faces away from the conductive layer of the upper conductive film; And an upper and lower conductive film attached to each edge portion of the upper and lower conductive films, and a pressure sensitive adhesive layer including a cured product of the pressure sensitive adhesive composition according to the present invention.
- the specific structure of the touch panel of the present invention is not particularly limited as long as it is configured using the pressure-sensitive adhesive composition according to the present invention.
- FIG. 3 is a diagram illustrating a touch panel constructed in accordance with an aspect of the present invention.
- the pressure-sensitive adhesive layer ( 12) may include a stacked structure.
- the pressure-sensitive adhesive layer 12 may be disposed in a state where the pressure-sensitive adhesive layer 12 is attached to the conductive layer 31c at the edge portions of the conductive films 31a and 31b.
- the specific kind of the conductive film used in the present invention is not particularly limited, and a general film in this field may be adopted.
- a transparent plastic film having an ITO electrode layer formed on one surface thereof may be used as the conductive film.
- polyethylene terephthalate film polytetrafluoroethylene film, polyethylene film, polypropylene film, polybutene film, polybutadiene film, vinyl chloride copolymer film, polyurethane film, ethylene -Vinyl acetate film, ethylene-propylene copolymer film, ethylene-ethyl acrylate copolymer film, ethylene-methyl acrylate copolymer film, polyimide film and the like
- PET polyethylene terephthalate
- the touch panel 40 of the present invention may further include an electrode layer 41 formed on the conductive layer 31c of the conductive films 31a and 31b.
- the electrode layer 41 may be formed at edge portions of the conductive layers 31c of the conductive films 31a and 31b, respectively.
- the pressure-sensitive adhesive layer 12 may adhere the conductive films 31a and 31b in a state of sealing the electrode layer 41 therein.
- the specific composition of the electrode layer that can be used is not particularly limited, and for example, the electrode layer may be formed using silver paste.
- FIG. 5 is a diagram illustrating a touch panel constructed in accordance with another aspect of the present invention.
- the electrode layer 41 as shown in FIG. 4 is formed on the conductive layer 31c, and the electrode layer 41 is sealed by the insulating layer 51. It may be.
- the pressure-sensitive adhesive layer 12 may be attached to the insulating layer 51 sealing the electrode layer 41 and may be included in a state in which two conductive films 31a and 31b are disposed to face each other.
- the material constituting the insulating layer is not particularly limited, and a general material used in this field may be used.
- EHA ethylhexyl acrylate
- MA methyl acrylate
- AA acrylic acid
- the monomer mixture was added, and ethyl acetate (EAc) was added as a solvent.
- azobisisobutyronitrile was purged with nitrogen gas for about 1 hour for oxygen removal, and the mixture was uniformed while maintaining the temperature at 62 ° C, and diluted to 50% in ethyl acetate as a reaction initiator.
- AIBN 0.03 part by weight was added.
- the mixture was reacted for about 8 hours to prepare an acrylic resin (A) having a weight average molecular weight of 1.5 million and a glass transition temperature of -30 ° C.
- Acrylic resins (B) to (C) were prepared in the same manner as in Production Example 1, except that the monomer composition was changed as shown in Table 1 below.
- polyfunctional crosslinking agent As a polyfunctional crosslinking agent, 0.4 weight part of bifunctional aziridine crosslinking agents, and 0.2 weight part of silane coupling agents (KBM 403, ShinEtsu (made)) are mix
- an adhesive composition which was diluted with a solvent to prepare a coating solution.
- the prepared coating solution was coated on a release-treated polyethylene terephthalate (PET) film (thickness: 75 ⁇ m) so as to have a thickness of about 30 ⁇ m. Thereafter, the mixture was dried at a temperature of about 100 ° C.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive layer was prepared by adhering the pressure-sensitive adhesive layer on both surfaces of a PET film having a thickness of 12 ⁇ m.
- An adhesive film was manufactured by the method according to Example 1, except that the composition of the pressure-sensitive adhesive composition was prepared as shown in Table 2 below.
- the pressure sensitive adhesives prepared in Examples and Comparative Examples were stored in a constant temperature and humidity room (23 ° C., 60% R.H.) for about 7 days. Subsequently, 0.3 g of the adhesive was taken, which was placed in a stainless steel 200 mesh wire mesh, immersed in 100 mL of ethyl acetate, and stored for 48 hours in a dark room at room temperature. Subsequently, after insoluble fraction was separated, it was dried in an oven at 120 ° C. for 4 hours, and its dry mass was measured. Then, the gel content was measured by substituting the measurement result of each said mass in the above-mentioned general formula (3).
- the pressure-sensitive adhesive films prepared in Examples and Comparative Examples were cut to a size of 1 in ⁇ 1 in ⁇ 72 ⁇ m (width ⁇ length ⁇ thickness), the release film was peeled off, and one side of the pressure-sensitive adhesive film was formed with an ITO surface. It was attached to the ITO side of the terephthalate (PET) film, and the opposite side of the adhesive film was attached to the SUS side. At this time, the adhesion of the adhesive film was performed by reciprocating five times the roller of 5 kg based on ASTM D1002. Then, after standing for 24 hours at room temperature, the high temperature shear strength was measured at a crosshead speed of 5 mm / min using a UTM (Universal Testing Machine, Zwick) in an oven at 100 °C.
- UTM Universal Testing Machine, Zwick
- Chemical resistance of the pressure-sensitive adhesive was evaluated by manufacturing a TSP (Turch Screen Panel) as shown in FIG. Specifically, after cutting the adhesive film prepared in Examples and Comparative Examples to the size of 4 cm ⁇ 10 cm (width ⁇ length), the size of the adhesive film having a size of the 4 cm ⁇ 10 cm (width ⁇ length). After removing the center portion having a width of 3.4 cm ⁇ 9.4 cm (width ⁇ length) to cut the width of the edge to 3 mm, the release film is peeled off, and two conductive PET films having an ITO layer 31c formed on one surface ( TSP was prepared by attaching between 31a and 31b) as shown in FIG. 3.
- TSP Transmission Screen Panel
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Abstract
Description
제조예1 | 제조예2 | 제조예3 | ||
아크릴계수지(A) | 아크릴계수지(B) | 아크릴계수지(C) | ||
단량체조성(중량부) | EHA | 65 | 85 | 65 |
MA | 25 | 5 | 25 | |
AA | 10 | 10 | 10 | |
Mw(만) | 150 | 200 | 70 | |
Tg(℃) | -30 | -55 | -30 | |
EHA: 에틸헥실 아크릴레이트MA: 메틸아크릴레이트AA: 아크릴산Mw: 중량평균분자량Tg: 유리전이온도 |
실시예 | 비교예 | ||||
1 | 2 | 1 | 2 | ||
아크릴수지 | 종류 | A | B | C | C |
함량 | 100 | 100 | 100 | 100 | |
가교제 함량 | 0.4 | 0.4 | 0.4 | 0.8 | |
실란계 커플링제 함량 | 0.2 | 0.2 | 0.2 | 0.2 | |
가교제: 2관능성 아지리딘계 가교제함량 단위: 중량부 |
구분 | 실시예 | 비교예 | ||
1 | 2 | 1 | 2 | |
겔 함량(%) | 52 | 35 | 50 | 85 |
고온 전단강도(Kg/in2) | 28 | 25 | 18 | 25 |
내화학성(100℃) | O | O | X | X |
Claims (15)
- 아크릴계 수지; 및 다관능성 가교제를 포함하고,하기 일반식 1 및 2의 조건을 만족하는 터치 패널용 점착제 조성물:[일반식 1]X1 ≤ 55[일반식 2]X2 ≥ 20 Kg/in2상기 일반식 1 및 2에서, X1은 상기 점착제 조성물의 경화물인 점착제의 겔함량을 나타내고, X2는 상기 점착제 조성물의 경화물인 점착제의 일면을 ITO 면이 형성된 폴리에틸렌테레프탈레이트 필름의 ITO 면에 부착하고, 상기 점착제의 반대면을 SUS면에 부착한 후, 상온에서 24시간 동안 방치한 다음, 100℃의 온도에서 5 mm/min의 크로스헤드 속도로 측정한 고온 전단강도를 나타낸다.
- 제 1 항에 있어서,아크릴계 수지는 중량평균분자량이 100만 이상인 터치 패널용 점착제 조성물.
- 제 1 항에 있어서,아크릴계 수지는 유리전이온도가 -60℃ 이상인 터치 패널용 점착제 조성물.
- 제 1 항에 있어서,아크릴계 수지는 (메타)아크릴산 에스테르계 단량체 및 가교성 단량체를 포함하는 단량체 혼합물의 중합체인 터치 패널용 점착제 조성물.
- 제 4 항에 있어서,가교성 단량체가 히드록실기 함유 단량체, 카복실기 함유 단량체 또는 질소 함유 단량체인 터치 패널용 점착제 조성물.
- 제 1 항에 있어서,다관능성 가교제가 이소시아네이트계 화합물, 에폭시계 화합물, 아지리딘계 화합물 및 금속 킬레이트계 화합물로 이루어진 군으로부터 선택된 하나 이상인 터치 패널용 점착제 조성물.
- 제 1 항에 있어서,다관능성 가교제는 아크릴계 수지 100 중량부에 대하여, 0.01 중량부 내지 10 중량부로 포함되는 터치 패널용 점착제 조성물.
- 기재 필름; 및상기 기재 필름의 일면 또는 양면에 형성되고, 제 1 항 내지 제 7 항 중 어느 한 항에 따른 점착제 조성물의 경화물을 포함하는 점착제층을 가지는 터치 패널용 점착필름.
- 제 8 항에 있어서,점착제층은 두께가 20 ㎛ 내지 150 ㎛인 터치 패널용 점착필름.
- 제 8 항에 있어서,기재 필름은, 폴리에틸렌테레프탈레이트 필름인 터치 패널용 점착필름.
- 제 8 항에 있어서,기재 필름은, 두께가 5 ㎛ 내지 50 ㎛인 터치 패널용 점착필름.
- 제 8 항에 있어서,점착제층상에 형성된 이형필름을 추가로 포함하는 터치 패널용 점착필름.
- 일면에 도전층이 형성되어 있는 상부 전도성 필름; 일면에 도전층이 형성되어 있으며, 상기 도전층이 상기 상부 전도성 필름의 도전층과 서로 이격된 상태로 대향되도록 배치된 하부 전도성 필름; 및상기 상부 및 하부 전도성 필름의 각 엣지부에서 상기 상부 및 하부 전도성 필름을 부착하고 있고, 제 1 항 내지 제 7 항 중 어느 한 항에 따른 점착제 조성물의 경화물을 포함하는 점착제층을 가지는 터치 패널.
- 제 13 항에 있어서,상부 및 하부 전도성 필름의 도전층의 엣지부에 각각 형성되고, 상기 전도성 필름을 부착하고 있는 점착제층의 내부에 존재하는 전극층을 추가로 포함하는 터치 패널.
- 제 13 항에 있어서,상부 및 하부 전도성 필름의 도전층의 엣지부에 형성된 전극층; 및 상기 전극층을 실링하고 있는 절연층을 추가로 포함하고,상기 상부 및 하부 전도성 필름을 부착하고 있는 점착제층은 상기 절연층에 각각 접착되어 있는 터치 패널.
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CN201180016446.8A CN102822301B (zh) | 2010-04-05 | 2011-04-05 | 触控面板用粘结剂组合物、粘结膜及触控面板 |
US13/634,430 US20130015909A1 (en) | 2010-04-05 | 2011-04-05 | Adhesive composition for a touch panel, adhesive film, and touch panel |
EP11766113.2A EP2557136B1 (en) | 2010-04-05 | 2011-04-05 | Adhesive composition for a touch panel, adhesive film, and touch panel |
JP2013502503A JP5789293B2 (ja) | 2010-04-05 | 2011-04-05 | タッチパネル用粘着剤組成物、粘着フィルム及びタッチパネル |
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KR1020100031102A KR101552741B1 (ko) | 2010-04-05 | 2010-04-05 | 터치 패널용 점착제 조성물, 점착필름 및 터치 패널 |
KR10-2010-0031102 | 2010-04-05 |
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KR (1) | KR101552741B1 (ko) |
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WO (1) | WO2011126262A2 (ko) |
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2010
- 2010-04-05 KR KR1020100031102A patent/KR101552741B1/ko active IP Right Grant
-
2011
- 2011-04-05 US US13/634,430 patent/US20130015909A1/en not_active Abandoned
- 2011-04-05 EP EP11766113.2A patent/EP2557136B1/en active Active
- 2011-04-05 CN CN201180016446.8A patent/CN102822301B/zh active Active
- 2011-04-05 WO PCT/KR2011/002355 patent/WO2011126262A2/ko active Application Filing
- 2011-04-05 JP JP2013502503A patent/JP5789293B2/ja active Active
- 2011-04-06 TW TW100111904A patent/TWI440679B/zh active
Non-Patent Citations (2)
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See also references of EP2557136A4 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9336428B2 (en) | 2009-10-30 | 2016-05-10 | Synaptics Incorporated | Integrated fingerprint sensor and display |
JP2013100485A (ja) * | 2011-10-14 | 2013-05-23 | Nitto Denko Corp | 両面粘着テープ |
US9785299B2 (en) | 2012-01-03 | 2017-10-10 | Synaptics Incorporated | Structures and manufacturing methods for glass covered electronic devices |
US20170204294A1 (en) * | 2012-05-21 | 2017-07-20 | Lg Chem, Ltd. | Optical member, pressure-sensitive adhesive composition and liquid crystal display |
US10131825B2 (en) * | 2012-05-21 | 2018-11-20 | Lg Chem, Ltd. | Optical member, pressure-sensitive adhesive composition and liquid crystal display |
Also Published As
Publication number | Publication date |
---|---|
KR101552741B1 (ko) | 2015-09-11 |
US20130015909A1 (en) | 2013-01-17 |
JP2013523940A (ja) | 2013-06-17 |
EP2557136A4 (en) | 2013-10-16 |
KR20110111826A (ko) | 2011-10-12 |
TW201134898A (en) | 2011-10-16 |
JP5789293B2 (ja) | 2015-10-07 |
CN102822301A (zh) | 2012-12-12 |
TWI440679B (zh) | 2014-06-11 |
EP2557136A2 (en) | 2013-02-13 |
WO2011126262A3 (ko) | 2012-03-15 |
CN102822301B (zh) | 2015-09-30 |
EP2557136B1 (en) | 2014-10-08 |
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