WO2017090982A1 - 광학용 점착제 조성물 및 광학 장치 - Google Patents
광학용 점착제 조성물 및 광학 장치 Download PDFInfo
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- WO2017090982A1 WO2017090982A1 PCT/KR2016/013555 KR2016013555W WO2017090982A1 WO 2017090982 A1 WO2017090982 A1 WO 2017090982A1 KR 2016013555 W KR2016013555 W KR 2016013555W WO 2017090982 A1 WO2017090982 A1 WO 2017090982A1
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- polyester
- adhesive composition
- urethane acrylate
- optical
- sensitive adhesive
- Prior art date
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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
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/04—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polyesters
- C08F299/0485—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polyesters from polyesters with side or terminal unsaturations
- C08F299/0492—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polyesters from polyesters with side or terminal unsaturations the unsaturation being in acrylic or methacrylic groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/088—Removal of water or carbon dioxide from the reaction mixture or reaction components
- C08G18/0885—Removal of water or carbon dioxide from the reaction mixture or reaction components using additives, e.g. absorbing agents
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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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
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09J175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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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
- 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
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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
- 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]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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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
- 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
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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
- C09K2323/03—Viewing layer characterised by chemical composition
- C09K2323/033—Silicon compound, e.g. glass or organosilicon
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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
- C09K2323/057—Ester polymer, e.g. polycarbonate, polyacrylate or polyester
Definitions
- the present invention relates to an optical pressure-sensitive adhesive composition and an optical device.
- a touch panel is introduced to such a large area smart mobile device, and the UV-curable transparent adhesive used at this time requires excellent optical properties with respect to transparency, visibility, and the like with high adhesive strength.
- maintaining the excellent physical properties of the pressure-sensitive adhesive for a long time in a high temperature and high humidity environment is one of the important problems in giving excellent durability to the mobile device and the like.
- One embodiment of the present invention provides a pressure-sensitive adhesive, excellent optical properties, and provides an optical pressure-sensitive adhesive composition that can maintain excellent adhesion and optical properties for a long time even in a high temperature and high humidity environment to impart excellent durability to the applied optical device. .
- Another embodiment of the present invention is an optical device having a pressure-sensitive adhesive layer formed using the optical pressure-sensitive adhesive composition, the pressure-sensitive adhesive layer can maintain excellent adhesion without discoloring for a long time under normal temperature as well as high temperature and high humidity environment, The result can be improved durability.
- an optical pressure-sensitive adhesive composition comprising a polyester-based urethane acrylate oligomer, an acrylate monomer, a photoinitiator and a hydrolysis inhibitor.
- an optical device having a pressure-sensitive adhesive layer containing a photocured product of the optical pressure-sensitive adhesive composition.
- the optical pressure-sensitive adhesive composition has a high adhesive strength, excellent optical properties, and the adhesive force and optical properties can be maintained for a long time even under high temperature and high humidity environment to impart excellent durability to the applied optical device.
- the optical device may have an improved durability by providing a pressure-sensitive adhesive layer containing a photocured product of the optical pressure-sensitive adhesive composition to maintain excellent adhesive force without discoloring for a long time even under high temperature and high humidity environment.
- One embodiment of the present invention provides an optical pressure-sensitive adhesive composition
- an optical pressure-sensitive adhesive composition comprising a polyester-based urethane acrylate oligomer, an acrylate monomer, a photoinitiator and a hydrolysis inhibitor.
- the optical pressure-sensitive adhesive composition has a high adhesive strength and can secure excellent optical properties by using an acrylate monomer and a photoinitiator together with the polyester-based urethane acrylate oligomer, and furthermore, the adhesive force and the optical properties are high temperature and high humidity. It can contribute to maximizing the benefits of long-term maintenance even in the environment.
- the optical pressure-sensitive adhesive composition includes a hydrolysis inhibitor together with the polyester-based urethane acrylate oligomer, thereby preventing the polyester structure from being hydrolyzed under a high temperature and high humidity environment, and the adhesive force and optical properties are high temperature and high humidity environment. Long term maintenance can be obtained even under
- the melting point (Tm) of the hydrolysis inhibitor may be more than 0 °C 40 °C.
- the melting point (Tm) of the hydrolysis inhibitor may be 0 ° C or more and 10 ° C or less, more specifically, 5 ° C or more and 10 ° C or less, or 5 ° C.
- the melting point of the hydrolysis inhibitor satisfies the above range, it may be well mixed with the optical pressure-sensitive adhesive composition having a certain viscosity, and the compatibility with the polyester-based urethane acrylate oligomer may be maximized.
- the hydrolysis inhibitor may be a liquid.
- the anti-hydrolysis agent may be a compound in a liquid form, and more specifically, the anti-hydrolysis agent may be a liquid at room temperature of about 20 °C to about 30 °C.
- the anti-hydrolysis agent may be solid at room temperature, and may change into a liquid form due to a small amount of heat generated when the solid anti-hydrolysis agent is mixed with the optical pressure-sensitive adhesive composition to be mixed with other materials. That is, the hydrolysis inhibitor may have a melting point of 0 ° C. or higher and 40 ° C. or lower, and the hydrolysis inhibitor may be mixed in a liquid form without additional heating.
- the hydrolysis inhibitor may have a melting point of 0 ° C. or higher and 40 ° C. or lower, and may be mixed without the addition of a separate heating process when preparing the optical pressure-sensitive adhesive composition.
- the melting point of the hydrolysis inhibitor is within the above range, compatibility with the polyester-based urethane acrylate oligomer can be improved, and a heating step is unnecessary during the preparation of the pressure-sensitive adhesive composition, so that the low molecular weight monomer accompanying the heating step
- the physical properties can be prevented from changing, and the hydrolysis prevention performance can be expressed without degrading the performance of the hydrolysis inhibitor.
- the hydrolysis inhibitor is selected from the group consisting of carbodiimide compounds, isocyanate compounds, polyfunctional hydroxy group-containing compounds, polyfunctional carboxyl group-containing compounds and polyfunctional amine compounds and combinations thereof It may include one.
- the optical pressure-sensitive adhesive composition can improve the discoloration prevention performance of the pressure-sensitive adhesive layer prepared by using the optical pressure-sensitive adhesive composition by using a hydrolysis inhibitor containing any one of the above-described compounds in a liquid form, high temperature and high humidity. It is possible to ensure excellent adhesion under the environment, it is possible to secure all the advantages that can effectively prevent the damage of the liquid crystal to external impact.
- the optical pressure-sensitive adhesive composition comprises a polyester-based urethane acrylate oligomer.
- the polyester-based urethane acrylate oligomer is an oligomer having a polyester chemical structure and a urethane chemical structure at the same time, for example, may be prepared by reacting an isocyanate compound having a polyester polyol and an acrylate group.
- the optical pressure-sensitive adhesive composition can exhibit an excellent adhesive force compared to the oligomer of the other type through the oligomer containing both a polyester structure and a urethane structure at the same time.
- the polyester urethane acrylate oligomer may include a mixture of a monofunctional polyester urethane acrylate oligomer and a polyfunctional polyester urethane acrylate oligomer.
- the term 'monofunctional' means including one acrylate group functional group having photoreactivity
- the term 'polyfunctional' means including two or more acrylate group functional groups having photoreactivity.
- polyester-based urethane acrylate oligomer includes a monofunctional polyester-based urethane acrylate oligomer and a polyfunctional polyester-based urethane acrylate oligomer at the same time, while improving the adhesive strength of the pressure-sensitive adhesive layer to be produced at the appropriate level of hardness and Modulus can be secured and advantageous advantages can be applied to the final product.
- the polyester-based urethane acrylate oligomer may include a mixture of monofunctional polyester-based urethane acrylate oligomer and bifunctional polyester-based urethane acrylate oligomer.
- the polyester-based urethane acrylate oligomer comprises a mixture of a monofunctional polyester-based urethane acrylate oligomer and a polyfunctional polyester-based urethane acrylate oligomer, the monofunctional
- the weight ratio of the polyester urethane acrylate oligomer and the multifunctional polyester urethane acrylate oligomer may be 4: 1 to 7: 1.
- the adhesion improvement effect and the reliability improvement effect of a high temperature and high humidity environment can be maximized, and applied to an optical device to provide excellent durability.
- the monofunctional and polyfunctional polyester-based urethane acrylate oligomers are mixed and used in the weight ratio of the above-mentioned range, the hardness of the pressure-sensitive adhesive layer to be produced is not too high or low, so that it can be adjusted to an appropriate hardness for electronic products. Can be.
- the weight average molecular weight (Mw) of the polyester-based urethane acrylate oligomer may be 10,000 or more and 40,000 or less.
- Mw weight average molecular weight
- the weight average molecular weight (Mw) of the monofunctional polyester-based urethane acrylate is 10,000 or more and 25,000 or less
- the weight average molecular weight (Mw) of the multifunctional polyester-based urethane acrylate is 30,000 It may be more than 40,000.
- the polyester-based urethane acrylate oligomer is a mixture of the monofunctional polyester urethane acrylate oligomer and the polyfunctional urethane acrylate oligomer in the weight average molecular weight range
- the optical pressure-sensitive adhesive composition is applied to electronic products It can be prepared with a pressure-sensitive adhesive layer adjusted to the appropriate hardness and shear strength.
- the optical pressure-sensitive adhesive composition includes an acrylate monomer together with the polyester-based urethane acrylate oligomer.
- the acrylate-based monomer is the reactive diluent monomer, specifically, it provides a tack property and serves to adjust the viscosity while ensuring reliability in a high temperature and high humidity environment.
- the acrylate monomer may include a monomer having a cycloalkyl group having 3 to 15 carbon atoms, a monomer having a heterocycloalkyl group having 2 to 15 carbon atoms, and a monomer having a hydrophilic functional group.
- the monomer having a cycloalkyl group having 3 to 15 carbon atoms isobornyl acrylate (IBOA), isobornyl methacrylate (IBOMA), cyclohexyl acrylate, cyclohexyl methacryl Latex, dicyclopentadiene acrylate, dicyclopentadiene methacrylate, and combinations thereof.
- IBOA isobornyl acrylate
- IBOMA isobornyl methacrylate
- cyclohexyl acrylate cyclohexyl methacryl Latex
- dicyclopentadiene acrylate dicyclopentadiene methacrylate
- dicyclopentadiene methacrylate and combinations thereof.
- the monomer having a heterocycloalkyl group of 2 to 15 is a group consisting of tetrahydrofurfuryl acrylate (THFA), tetrahydrofurfuryl methacrylate (THFMA) and combinations thereof It may include one selected from.
- THFA tetrahydrofurfuryl acrylate
- THFMA tetrahydrofurfuryl methacrylate
- the monomer having a hydrophilic functional group may be a monomer having a hydroxy group, a carboxyl group or an amine group.
- the monomer having a hydroxy group is hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate, hydroxybutyl acrylate, hydroxybutyl methacrylate, hydroxy Pentyl acrylate, hydroxypentyl methacrylate, hydroxyhexyl acrylate, hydroxyhexyl methacrylate, hydroxyoctyl acrylate, hydroxyoctyl methacrylate, hydroxydecyl acrylate, hydroxydecyl methacrylate and It may include one selected from the group consisting of a combination thereof.
- the monomer having a carboxyl group may include one selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, itaconic acid, fumaric acid, cinnamic acid, Michael adducts of (meth) acrylic acid, and combinations thereof.
- the Michael adduct of meta) acrylic acid may comprise one selected from the group consisting of acrylic acid dimers, methacrylic acid dimers, acrylic acid trimers, methacrylic acid trimers, acrylic acid tetramers, methacrylic acid tetramers, and combinations thereof. .
- the monomer having an amine group may include one selected from the group consisting of dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, and combinations thereof.
- the acrylate monomers may further include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, sec- Butyl (meth) acrylate, pentyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-ethylbutyl (meth) acrylate, n-octyl (meth) acrylate, isooxyl (meth) acrylate It may further comprise one selected from the group consisting of, isononyl (meth) acrylate, lauryl (meth) acrylate, tetradecyl (meth) acrylate and combinations thereof.
- the optical pressure-sensitive adhesive composition has photocurability, and includes a photoinitiator for such photocuring.
- the photoinitiator may be used without particular limitation so long as it initiates photocuring by light irradiation, for example, benzoin methyl ether, 2,4,6-trimethylbenzoyl diphenylphosphine oxide, bis (2,4, 6-trimethylbenzoyl) phenylphosphine oxide, ⁇ , ⁇ -methoxy- ⁇ -hydroxyacetophenone, 2-benzoyl-2- (dimethylamino) -1- [4- (4-morphonyl) phenyl] -1 -Butanone, 2,2-dimethoxy-2-phenylacetophenone, 2, 2-dimethoxy-1,2-diphenylethan-1-one, 1-hydroxy-cyclohexyl-phenylketone, 2-benzyl 2- (dimethylamino) -1- [4- (4-morpholinyl) pheny
- the optical pressure-sensitive adhesive composition may include both the polyester-based urethane acrylate oligomer and the hydrolysis inhibitor together to ensure high adhesion and excellent reliability under high temperature and high humidity environment.
- the generally used hydrolysis inhibitor may have a color by itself, or may be in a translucent or opaque state, and such a hydrolysis inhibitor may not be suitable for use in an adhesive requiring excellent optical properties.
- the optical pressure-sensitive adhesive composition has its own color by appropriately adjusting the content of each component, despite the use of a translucent or opaque hydrolysis inhibitor, transparency and visibility It is possible to realize excellent optical properties without deterioration.
- the amount of the hydrolysis inhibitor may be 0.1 parts by weight or more and 10 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the amount of the hydrolysis inhibitor may be 0.5 parts by weight or more and 5 parts by weight or less, or 0.5 parts by weight or more and 2 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the content of the acrylate monomer may be 10 parts by weight or more and 25 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the content of the acrylate monomer may be 12 parts by weight or more and 20 parts by weight or less, or 15 parts by weight or more and 20 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the content of the photoinitiator may be 0.1 parts by weight or more and 2 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer. Specifically, the content of the photoinitiator may be 0.5 parts by weight or more and 1.5 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the optical pressure-sensitive adhesive composition can secure the gel content required for photocuring, and can realize the required level of adhesive force.
- the optical pressure-sensitive adhesive composition if necessary, thixotropy, plasticizer, antioxidant, light stabilizer, curing agent, curing accelerator, adhesion promoter, surface lubricant, leveling agent, softener, anti-aging agent. It may further comprise one selected from the group consisting of a UV absorber, a polymerization inhibitor and a combination thereof.
- the thixotropic agent may serve to impart thixotropy to the optical pressure-sensitive adhesive composition.
- the thixotropy refers to a property in which the suspension has no fluidity at rest, but has fluidity when vibrated.
- the optical pressure-sensitive adhesive composition may further include a thixotropic imparting agent, thereby obtaining a process advantage that does not flow when applied to a required position.
- the thixotropic imparting agent may include one selected from the group consisting of fumed silica, bentonite, ultraprecipitated calcium carbonate, and combinations thereof.
- the optical pressure-sensitive adhesive composition may include fumed silica as a thixotropic imparting agent, in which case it may be advantageous to secure thixotropy without degrading the optical properties.
- the content of the thixotropic imparting agent may be 1 part by weight or more and 3.5 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the plasticizer may be contained in the optical pressure sensitive adhesive composition to control the viscosity and to provide flexibility to the cured optical pressure sensitive adhesive composition.
- the plasticizer may be diisononylcyclohexane-1,2-dicarboxylate (DINCH), bis-2-ethylhexylhexanedioate (DEHA), dioctyl adipate (DOA), diisononyl adipate ( DINA), triethylene glycol bis-2-decylhexanoate (TEG-EH), and combinations thereof.
- DICH diisononylcyclohexane-1,2-dicarboxylate
- DEHA bis-2-ethylhexylhexanedioate
- DOA dioctyl adipate
- DINA diisononyl adipate
- TAG-EH triethylene glycol bis-2-decylhexanoate
- the content of the plasticizer may be 10 parts by weight or more and 30 parts by weight or less based on 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the plasticizer may improve the viscosity control and optical properties of the optical pressure-sensitive adhesive composition, the plasticizer may be effective in inhibiting the increase in the curing shrinkage rate does not participate in the reaction as a non-functional group. .
- the curing agent may serve to adjust the degree of curing when the optical pressure-sensitive adhesive composition is cured.
- the curing agent may include, for example, a bifunctional acrylate compound, and the bifunctional acrylate compound may be hexanediol diacrylate (HDDA), polyethylene glycol diacrylate (PEGDA), butanediol diacrylate (BDDA). It may include one selected from the group consisting of tripropylene glycol diacrylate (TPGDA) and combinations thereof.
- a bifunctional acrylate compound may be hexanediol diacrylate (HDDA), polyethylene glycol diacrylate (PEGDA), butanediol diacrylate (BDDA). It may include one selected from the group consisting of tripropylene glycol diacrylate (TPGDA) and combinations thereof.
- HDDA hexanediol diacrylate
- PEGDA polyethylene glycol diacrylate
- BDDA butanediol diacrylate
- TPGDA tripropylene glycol diacrylate
- the content of the curing agent may be 0.1 part by weight or more and 2 parts by weight or less with respect to 100 parts by weight of the polyester-based urethane acrylate oligomer.
- the curing agent increases the curing density of the optical pressure-sensitive adhesive composition to increase the high temperature reliability, it is possible to obtain the effect of improving the cohesion.
- Another embodiment of the present invention provides an optical device having a pressure-sensitive adhesive layer containing a photocured product of the optical pressure-sensitive adhesive composition.
- the matter regarding the said optical adhesive composition is as above-mentioned.
- the optical device may exhibit excellent durability through the pressure-sensitive adhesive layer containing the photocured material of the optical pressure-sensitive adhesive composition, it may also be excellent in optical properties.
- the optical pressure-sensitive adhesive composition may be applied to the optical device in a liquid state.
- the optical pressure-sensitive adhesive composition may be applied to a location where there are many steps to exhibit excellent step absorption.
- an advantageous advantage can be obtained for bonding of large areas.
- the optical pressure-sensitive adhesive composition is applied to the optical device in a liquid state, and photocured after the application.
- the said optical apparatus is equipped with the adhesive layer containing the photocured material of the said optical adhesive composition.
- the photocuring of the optical pressure-sensitive adhesive composition is carried out by irradiating light with a wavelength of about 280nm to about 420nm, for example, by irradiation with light energy of about 1,000mJ / cm2 to about 6,000mJ / cm2 Can be formed.
- the optical pressure-sensitive adhesive composition may realize excellent durability by photocuring by light of the wavelength and energy of the above range, it is possible to obtain a faster curing rate compared to thermal curing.
- the Shore hardness of the pressure-sensitive adhesive layer may be 9 or more and 12 or less, and specifically, Shore E-type hardness may satisfy the above range. If the hardness of the pressure-sensitive adhesive layer is less than the above range there is a problem that does not satisfy the level required by the adhesive force, if it exceeds the above range there is a problem that a yellowing phenomenon appears due to external impact or stress generated in the process.
- the Shore E-type hardness can be measured by a conventional method, for example, can be measured at room temperature using a Shore E-type hardness meter for the cylindrical pressure-sensitive adhesive layer cured to a diameter of 20mm, 6mm in height.
- the optical device may be a liquid crystal display device having a touch panel.
- the optical pressure-sensitive adhesive composition has excellent optical properties in view of transparency and haze, etc., and may be applied to a position where interface attachment is required without degrading visibility and may exhibit excellent performance.
- the light transmittance of the pressure-sensitive adhesive layer may be 90% or more, specifically 95% or more may be 99% or less.
- the light transmittance may be light transmittance measured in a wavelength range of the visible light range, and may be light transmittance measured in light of a wavelength of 550 nm.
- the haze of the pressure-sensitive adhesive layer may be 1.0% or less, specifically, 0.5% or less. The light transmittance and the haze of the pressure-sensitive adhesive layer satisfy the above ranges, respectively, so that the optical device can exhibit excellent visibility.
- Polyester-based urethane acrylate by mixing a monofunctional polyester urethane acrylate oligomer having a weight average molecular weight of 10,000 to 20,000 and a bifunctional polyester urethane acrylate oligomer having a weight average molecular weight of 30,000 to 40,000 at a weight ratio of 4: 1. Oligomeric mixtures were prepared. To 100 parts by weight of the polyester-based urethane acrylate oligomer, 15 parts by weight of acrylate and 4 parts by weight of hydroxy (meth) acrylate as a reaction dilution monomer were mixed with the mixture.
- an optical pressure-sensitive adhesive composition was prepared in the same manner as in Example 1, except that 1 part by weight of a bifunctional acrylate was further included as a curing agent.
- Polyester-based urethane acrylate by mixing a monofunctional polyester urethane acrylate oligomer having a weight average molecular weight of 10,000 to 20,000 and a bifunctional polyester urethane acrylate oligomer having a weight average molecular weight of 30,000 to 40,000 at a weight ratio of 7: 1.
- An optical pressure-sensitive adhesive composition was prepared in the same manner as in Example 1, except that the oligomer mixture was prepared.
- Polyester-based urethane acrylate by mixing a monofunctional polyester urethane acrylate oligomer having a weight average molecular weight of 10,000 to 20,000 and a bifunctional polyester urethane acrylate oligomer having a weight average molecular weight of 30,000 to 40,000 at a weight ratio of 5: 1.
- An optical pressure-sensitive adhesive composition was prepared in the same manner as in Example 1, except that the oligomer mixture was prepared.
- An optical pressure-sensitive adhesive composition was prepared in the same manner as in Example 1, except that the melting point (Tm) contained no liquid carbodiimide hydrolysis inhibitor having a liquid phase of 5 ° C.
- An optical pressure-sensitive adhesive composition was prepared in the same manner as in Example 2, except that the melting point (Tm) contained no liquid carbodiimide hydrolysis inhibitor having a liquid phase of 5 ° C.
- the optical adhesive was prepared in the same manner as in Example 1 except that liquid carbodiimide-based hydrolysis inhibitors having a melting point (Tm) of 50 ° C. and 80 ° C. were used, respectively. There was a problem not mixing with the production of the pressure-sensitive adhesive layer was impossible.
- Tm melting point
- Polyester-based urethane acrylate by mixing a monofunctional polyester urethane acrylate oligomer having a weight average molecular weight of 10,000 to 20,000 and a bifunctional polyester urethane acrylate oligomer having a weight average molecular weight of 30,000 to 40,000 at a weight ratio of 3: 1.
- An optical pressure-sensitive adhesive composition was prepared in the same manner as in Example 1, except that the oligomer mixture was prepared.
- Polyester-based urethane acrylate by mixing a monofunctional polyester urethane acrylate oligomer having a weight average molecular weight of 10,000 to 20,000 and a bifunctional polyester urethane acrylate oligomer having a weight average molecular weight of 30,000 to 40,000 at a weight ratio of 8: 1.
- An optical pressure-sensitive adhesive composition was prepared in the same manner as in Example 1, except that the oligomer mixture was prepared.
- Each of the optical pressure sensitive adhesive compositions according to Examples 1 to 4, Comparative Examples 1 and 2, and Reference Examples 1 to 3 was photocured under light energy conditions of 3,000 mJ / cm 2 using a light source (Metal Halide) And Shore E hardness (Initial) was measured using a Shore E hardness tester (Asker, CL-150) at room temperature. Subsequently, the pressure-sensitive adhesive layer was left for 5 days at a temperature of 60 ° C. and a relative humidity of 90%, and then late Shore E type hardness (60/90 5days) was measured in the same manner. The results are as described in Table 1 below.
- Each of the optical pressure-sensitive adhesive compositions according to Examples 1 to 4, Comparative Examples 1 and 2, and Reference Examples 1 to 3 was applied to the optical adhesive with a diameter of 2cm and a thickness of 200um between two slide glasses, A pressure-sensitive adhesive layer was prepared by photocuring under light energy conditions of 3,000 mJ / cm 2 to prepare a shear strength measurement sample. Furthermore, the initial shear strength (Initial) was measured at 25 ° C. at a speed of 25 mm / min using an adhesive force meter (Stable Micro Systems, TA XT-PLUS). Subsequently, the pressure-sensitive adhesive layer was left for 3 days at a temperature of 85 ° C. and a relative humidity of 85%, and then the late shear strength (85/85 3days) was measured in the same manner. The results are as described in Table 1 below.
- Example 1 10.7 10.5 1.87% 0.98 0.95 3.06%
- Example 2 11.9 11.9 0% 0.79 0.77 2.53%
- Example 3 10.6 10.3 2.83% 0.73 0.68 6.85%
- Example 4 9.2 9.0 2.17% 0.5 0.46 8.00%
- Comparative Example 1 11.7 9.9 15.38% 1.23 0.36 70.73%
- Comparative Example 2 11.5 11.0 4.35% 1.14 0.54 52.63%
- Reference Example 1 13.0 12.9 0.77% 1.13 1.07 5.31%
- Reference Example 2 7.4 7.2 2.70% 0.23 0.19 17.39%
- Reference Example 3 14.0 14.0 0% 1.23 1.2 2.44%
- the pressure-sensitive adhesive layer prepared by using the optical pressure-sensitive adhesive composition according to the embodiment is effective in securing the reliability of physical properties under high temperature and high humidity environment compared to the optical pressure-sensitive adhesive compositions of Comparative Examples 1 and 2 It can be seen that it is excellent.
- the optical pressure-sensitive adhesive composition of Examples 1 and 2 is a reduction rate of hardness and shear strength of less than 4%, respectively, under a high temperature and high humidity environment, and shows a significantly lower degree of reduction than Comparative Examples 1 and 2, thereby high temperature and high humidity It can be confirmed that physical properties such as hardness and shear strength are well maintained in the environment.
- the weight ratio of the monofunctional polyester-based urethane acrylate oligomer and the bifunctional polyester-based urethane acrylate oligomer is 4: 1 to 7: 1
- it can represent the most appropriate level of hardness.
- the Shore hardness exceeds 12, yellowing may occur due to external impact or stress generated in the process, and in the case of Reference Examples 1 and 3, it may be confirmed that the Shore hardness is too high.
- the Shore hardness is less than 9
- there is a problem that the adhesion performance is too low to implement the required performance when applied to the product
- Reference Example 2 it can be seen that the Shore hardness is extremely low.
- it since it has a suitable shore strength and shear strength, it can implement excellent performance when applied to the product.
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Abstract
Description
쇼어 E형 경도 | 전단 강도[MPa] | |||||
Initial | 60/90 5days | 감소율 | Initial | 85/85 3days | 감소율 | |
실시예 1 | 10.7 | 10.5 | 1.87% | 0.98 | 0.95 | 3.06% |
실시예 2 | 11.9 | 11.9 | 0% | 0.79 | 0.77 | 2.53% |
실시예 3 | 10.6 | 10.3 | 2.83% | 0.73 | 0.68 | 6.85% |
실시예 4 | 9.2 | 9.0 | 2.17% | 0.5 | 0.46 | 8.00% |
비교예 1 | 11.7 | 9.9 | 15.38% | 1.23 | 0.36 | 70.73% |
비교예 2 | 11.5 | 11.0 | 4.35% | 1.14 | 0.54 | 52.63% |
참고예 1 | 13.0 | 12.9 | 0.77% | 1.13 | 1.07 | 5.31% |
참고예 2 | 7.4 | 7.2 | 2.70% | 0.23 | 0.19 | 17.39% |
참고예 3 | 14.0 | 14.0 | 0% | 1.23 | 1.2 | 2.44% |
Claims (14)
- 폴리에스테르계 우레탄 아크릴레이트 올리고머, 아크릴레이트계 모노머, 광개시제 및 가수분해 방지제를 포함하는 광학용 점착제 조성물.
- 제1항에 있어서,상기 가수분해 방지제의 녹는점(Tm)은 0℃ 이상 40℃ 이하인 것인 광학용 점착제 조성물.
- 제1항에 있어서,상기 가수분해 방지제는 액상인 것인 광학용 점착제 조성물.
- 제1항에 있어서,상기 가수분해 방지제는 카보디이미드계 화합물, 이소시아네이트계 화합물, 다관능 히드록시기 함유 화합물, 다관능 카르복실기 함유 화합물 및 다관능 아민계 화합물 및 이들의 조합으로 이루어진 군으로부터 선택된 하나를 포함하는 것인 광학용 점착제 조성물.
- 제1항에 있어서,상기 폴리에스테르계 우레탄 아크릴레이트 올리고머는,단관능 폴리에스테르계 우레탄 아크릴레이트 올리고머 및 다관능 폴리에스테르계 우레탄 아크릴레이트 올리고머의 혼합물을 포함하는 것인 광학용 점착제 조성물.
- 청구항 5에 있어서,상기 단관능 폴리에스테르계 우레탄 아크릴레이트 올리고머와 상기 다관능 폴리에스테르계 우레탄 아크릴레이트 올리고머의 중량비는 4:1 내지 7:1인 것인 광학용 점착제 조성물.
- 청구항 5에 있어서,상기 단관능 폴리에스테르계 우레탄 아크릴레이트의 중량평균분자량(Mw)은 10,000 이상 25,000 이하이고,상기 다관능 폴리에스테르계 우레탄 아크릴레이트의 중량평균분자량(Mw)은 30,000 이상 40,000 이하인 것인 광학용 점착제 조성물.
- 제1항에 있어서,상기 아크릴레이트계 모노머는, 탄소수 3 내지 15의 시클로알킬기를 갖는 모노머; 탄소수 2 내지 15의 헤테로시클로알킬기를 갖는 모노머; 및 친수성 관능기를 갖는 모노머를 포함하는 것인 광학용 점착제 조성물.
- 제1항에 있어서,상기 가수분해 방지제의 함량은, 상기 폴리에스테르계 우레탄 아크릴레이트 올리고머 100 중량부에 대하여 0.1 중량부 이상 10 중량부 이하인 것인 광학용 점착제 조성물.
- 제1항에 있어서,상기 아크릴레이트계 모노머의 함량은, 상기 폴리에스테르계 우레탄 아크릴레이트 올리고머 100 중량부에 대하여 10 중량부 이상 25 중량부 이하인 것인 광학용 점착제 조성물.
- 제1항에 있어서,상기 광학용 점착제 조성물은 요변성 부여제, 가소제, 산화방지제, 광안정제, 경화제, 경화촉진제, 점착증진제, 표면윤활제, 레벨링제, 연화제, 노화방지제, 자외선 흡수제, 중합 금지제 및 이들의 조합으로 이루어진 군으로부터 선택된 하나를 더 포함하는 것인 광학용 점착제 조성물.
- 제1항 내지 제11항 중 어느 한 항에 따른 광학용 점착제 조성물의 광경화물을 포함하는 점착제층을 구비한 광학 장치.
- 제12항에 있어서,상기 점착제층의 쇼어 경도는 9 이상 12 이하인 것인 광학 장치.
- 제11항에 있어서,상기 점착제층의 광투과성은 90% 이상이고, 헤이즈가 1.0% 이하인 것인 광학 장치.
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