KR20210077287A - Compound, adhesive composition, polarizer and display apparatus - Google Patents

Abstract

The present specification relates to a compound represented by chemical formula 1, an adhesive composition comprising the same, a polarizing plate, and an image display apparatus. By using the compound described in the present specification as the adhesive composition for the polarizing plate, it is possible to provide the adhesive composition having excellent UV blocking performance and exhibiting excellent durability.

Description

Compound, pressure-sensitive adhesive composition, polarizing plate and image display device {COMPOUND, ADHESIVE COMPOSITION, POLARIZER AND DISPLAY APPARATUS}

The present specification relates to a compound, a pressure-sensitive adhesive composition, a polarizing plate, and an image display device.

A polarizing plate used in various image display devices such as a liquid crystal display device, a plasma display device, and an electroluminescent device has a structure in which a polarizer made of a polyvinyl alcohol-based film and a protective film are formed on at least one surface of the polarizer. On the other hand, a polyvinyl alcohol-based pressure-sensitive adhesive is mainly used as an adhesive for a polarizing plate used for bonding the polarizer and the protective film.

However, since the polyvinyl alcohol-based resin pressure-sensitive adhesive is a water-soluble polymer, there is a problem in that the pressure-sensitive adhesive is dissolved under a high humidity condition and the polarizer and the protective film are peeled off.

In order to improve this problem, the polyvinyl alcohol-based resin is modified by adding an acetoacetyl group, or by copolymerizing a hydrophobic vinyl monomer such as ethyl acrylate, methyl acrylate, acrylic acid, or methacrylic acid, or polyvinyl alcohol-based resin. A method of using a resin mixed with a crosslinking agent such as glyoxalate or an amine metal salt has been proposed.

In the case of polyvinyl alcohol-based pressure-sensitive adhesives prepared by the above method, the water resistance tends to be somewhat improved compared to the case of using polyvinyl alcohol alone, but when applied to a high-speed production line, the water resistance and adhesion are still insufficient. There is a problem. In addition, in the case of the modified polyvinyl alcohol-based resin pressure-sensitive adhesive, there was a problem in that staining occurred under alkaline pH conditions, and in the case of mixing the cross-linking agent, the optical properties of the polarizing plate decreased depending on the amount of the cross-linking agent.

Therefore, while maintaining the optical properties of the polarizing plate, there is a need for an adhesive for adhering a polarizer and a protective film having excellent adhesion and water resistance to the polarizer and the protective film.

Japanese Publication 2003-121644

The present specification provides a compound, a pressure-sensitive adhesive composition, a polarizing plate and an image display device.

According to an exemplary embodiment of the present specification, a compound represented by the following Chemical Formula 1 is provided.

[Formula 1]

In Formula 1,

R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted alkyl group; Or a substituted or unsubstituted cycloalkyl group, or combine with each other to form a substituted or unsubstituted ring,

R3 is hydrogen; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''R''''; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group,

R4 and R5 are the same as or different from each other, and each independently hydrogen; -CN; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''R''''; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group,

R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted alkyl group; Or a substituted or unsubstituted aryl group,

R6 to R8 are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted alkoxy group.

According to another exemplary embodiment of the present specification, there is provided a pressure-sensitive adhesive composition comprising the compound.

According to another exemplary embodiment of the present specification, there is provided a polarizing plate including the pressure-sensitive adhesive composition or a cured product thereof.

According to another exemplary embodiment of the present specification, an image display device including the polarizing plate is provided.

By using the compound described herein as a pressure-sensitive adhesive composition for a polarizing plate, it is excellent in blocking UV rays, and when applied to a polarizing plate, it is possible to provide a pressure-sensitive adhesive composition capable of exhibiting excellent durability without reducing the optical properties of the polarizing plate.

1 is a cross-sectional view of a polarizing plate according to an embodiment of the present specification.
2 is a cross-sectional view of an image display device including a polarizing plate according to an exemplary embodiment of the present specification.

Hereinafter, the present specification will be described in more detail.

According to an exemplary embodiment of the present specification, there is provided a compound represented by Formula 1 above.

The compound represented by Formula 1 may be mixed with the pressure-sensitive adhesive composition. The compound of Formula 1 has an amine group substituted with pyridine as a core, has an acceptor group including a nitrile group, has excellent molar extinction coefficient, and effectively absorbs an ultraviolet region including a blue region of 380 nm or more. When a film is prepared from a pressure-sensitive adhesive composition including the compound represented by Formula 1 or a cured product thereof and applied to a fun light plate, durability can be improved without degrading the optical properties of the polarizing plate.

In the present specification, when a part "includes" a certain component, this means that other components may be further included rather than excluding other components unless otherwise stated.

In the present specification, when a member is said to be located "on" another member, this includes not only a case in which a member is in contact with another member but also a case in which another member exists between the two members.

Examples of substituents in the present specification are described below, but are not limited thereto.

The term "substitution" means that a hydrogen atom bonded to a carbon atom of a compound is replaced with another substituent, and the position to be substituted is not limited as long as the position at which the hydrogen atom is substituted, that is, a position where the substituent is substitutable, is not limited, and when two or more , two or more substituents may be the same as or different from each other.

As used herein, the term "substituted or unsubstituted" refers to deuterium; halogen group; cyano group; nitrile group; nitro group; carboxyl group (-COOH); ester group; hydroxyl group; an alkyl group; cycloalkyl group; alkoxy group; aryl group; And it means that it is substituted with one or two or more substituents selected from the group consisting of a heterocyclic group, is substituted with a substituent to which two or more of the above-exemplified substituents are connected, or does not have any substituents. For example, "a substituent in which two or more substituents are connected" may be a biphenyl group. That is, the biphenyl group may be an aryl group, and may be interpreted as a substituent in which two phenyl groups are connected. Another example of "a substituent in which two or more substituents are connected" may be an ethenylphenyl group. It is interpreted as a substituent in which an ethenyl group and a phenyl group are connected.

In an exemplary embodiment of the present specification, the term "substituted or unsubstituted" refers to deuterium; halogen group; cyano group; nitrile group; nitro group; carboxyl group (-COOH); an ester group having 1 to 10 carbon atoms; hydroxyl group; an alkyl group having 1 to 10 carbon atoms; a cycloalkyl group having 3 to 30 carbon atoms; an alkoxy group having 1 to 10 carbon atoms; an aryl group having 6 to 30 carbon atoms; And it means that it is substituted with one or two or more substituents selected from the group consisting of a heterocyclic group having 2 to 30 carbon atoms, or is substituted with a substituent to which two or more of the above-exemplified substituents are connected, or does not have any substituents.

In the present specification, the halogen group may be fluorine, chlorine, bromine or iodine.

In the present specification, the ester group may be -C(=O)OR ₁₀₅ , or -OC(=O)R ₁₀₆ , wherein R ₁₀₅ and R ₁₀₆ are the same as or different from each other, and each independently hydrogen, substituted or An unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, or a substituted or unsubstituted aryl group, but is not limited thereto. Specifically, the oxygen of the ester group is an alkyl group having 1 to 25 carbon atoms; an alkenyl group having 2 to 25 carbon atoms; an aryl group having 6 to 30 carbon atoms; Or it may be substituted with a heterocyclic group having 2 to 30 carbon atoms. In an exemplary embodiment of the present specification, the oxygen is an alkyl group having 1 to 10 carbon atoms; an alkenyl group having 1 to 10 carbon atoms; an aryl group having 6 to 20 carbon atoms; or a heterocyclic group having 2 to 20 carbon atoms.

In the present specification, the alkyl group may be a straight chain or branched chain, and the number of carbon atoms is not particularly limited, but 1 to 30; 1 to 20; 1 to 10; Or 1 to 5 are preferable. Specific examples include methyl, ethyl, propyl, n-propyl, isopropyl, butyl, n-butyl, isobutyl, tert-butyl, sec-butyl, 1-methylbutyl, 1-ethylbutyl, pentyl, n-pentyl, iso Pentyl, neopentyl, tert-pentyl, hexyl, n-hexyl, 1-methylpentyl, 2-methylpentyl, 3,3-dimethylbutyl, 2-ethylbutyl, heptyl, n-heptyl, 1-methylhexyl, cyclopentyl Methyl, cyclohexylmethyl, octyl, n-octyl, tert-octyl, 1-methylheptyl, 2-ethylhexyl, 2-propylpentyl, n-nonyl, 2,2-dimethylheptyl, 1-ethylpropyl, 1,1 -Dimethylpropyl, isohexyl, 4-methylhexyl, 5-methylhexyl, and the like, but is not limited thereto.

In the present specification, the cycloalkyl group is not particularly limited, but has 3 to 30 carbon atoms; 3 to 20 carbon atoms; 3 to 10 carbon atoms; or preferably having 3 to 6 carbon atoms, specifically cyclopropyl, cyclobutyl, cyclopentyl, 3-methylcyclopentyl, 2,3-dimethylcyclopentyl, cyclohexyl, 3-methylcyclohexyl, 4-methylcyclohexyl, 2,3-dimethylcyclohexyl, 3,4,5-trimethylcyclohexyl, 4-tert-butylcyclohexyl, cycloheptyl, cyclooctyl, and the like, but is not limited thereto.

In the present specification, the alkoxy group is an alkyl group connected to an oxygen atom, and may be a straight chain, a branched chain, or a cyclic chain. The number of carbon atoms in the alkoxy group is not particularly limited, but 1 to 30; 1 to 20; 1 to 10; Or 1 to 5 are preferable. Specifically, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, tert-butoxy, sec-butoxy, n-pentyloxy, neopentyloxy, isopentyloxy, n -hexyloxy, 3,3-dimethylbutyloxy, 2-ethylbutyloxy, n-octyloxy, n-nonyloxy, n-decyloxy, benzyloxy, p-methylbenzyloxy, etc. may be It is not limited.

In the present specification, the aryl group means a monovalent group of a monovalent aromatic hydrocarbon or an aromatic hydrocarbon derivative. In the present specification, the aromatic hydrocarbon refers to a compound in which the pi electrons are completely conjugated and includes a planar ring, and the group derived from the aromatic hydrocarbon refers to a structure in which an aromatic hydrocarbon or a cyclic aliphatic hydrocarbon is condensed with an aromatic hydrocarbon. . Also, in the present specification, the aryl group is intended to include a monovalent group in which two or more aromatic hydrocarbons or derivatives of aromatic hydrocarbons are connected to each other. The aryl group is not particularly limited, but has 6 to 50 carbon atoms; 6 to 30; 6 to 25; 6 to 20; 6 to 18; Or it is preferably 6 to 13, and the aryl group may be monocyclic or polycyclic. Specifically, the monocyclic aryl group may be a phenyl group, a biphenyl group, a terphenyl group, and the like, but is not limited thereto. Specifically, the polycyclic aryl group may be a naphthyl group, an anthracenyl group, a phenanthryl group, a triphenyl group, a pyrenyl group, a perylenyl group, a chrysenyl group, a fluorenyl group, and the like, but is not limited thereto.

In the present specification, the fluorenyl group may be substituted, and adjacent substituents may combine with each other to form a substituted or unsubstituted ring.

In the present specification, when it is said that the fluorenyl group may be substituted, the substituted fluorenyl group includes all compounds in which the substituents of the pentacyclic ring of fluorene are spiro-bonded with each other to form an aromatic hydrocarbon ring. The substituted fluorenyl group includes 9,9'-spirobifluorene, spiro[cyclopentane-1,9'-fluorene], spiro[benzo[c]fluorene-7,9-fluorene], etc. However, the present invention is not limited thereto.

In the present specification, the aryloxy group is an aryl group connected to an oxygen atom, and the aryl group of the aryloxy group is the same as the example of the aryl group described above. Specifically, the aryloxy group includes a phenoxy group, p-tolyloxy group, m-tolyloxy group, 3,5-dimethyl-phenoxy group, 2,4,6-trimethylphenoxy group, p-tert-butylphenoxy group, 3- Biphenyloxy group, 4-biphenyloxy group, 1-naphthyloxy group, 2-naphthyloxy group, 4-methyl-1-naphthyloxy group, 5-methyl-2-naphthyloxy group, 1-anthryloxy group , 2-anthryloxy group, 9-anthryloxy group, 1-phenanthryloxy group, 3-phenanthryloxy group, 9-phenanthryloxy group, etc., and the arylthioxy group includes phenylthioxy group, 2- and a methylphenylthioxy group, a 4-tert-butylphenylthioxy group, and the like, but are not limited thereto.

In the present specification, the description of the heterocyclic group or hydrocarbon ring described below may be applied to the "ring" of those that combine to form a substituted or unsubstituted ring.

In the present specification, the heterocyclic group includes one or more atoms other than carbon and heteroatoms, and specifically, the heteroatoms may include one or more atoms selected from the group consisting of O, N and S. Although the number of carbon atoms is not particularly limited, 2 to 50 carbon atoms; 2 to 30; 2 to 25; 2 to 20; 2 to 18; Or it is preferably 2 to 13, and the heterocyclic group may be monocyclic or polycyclic. Examples of the heterocyclic group include a thiophene group, a furanyl group, a pyrrole group, an imidazole group, a thiazole group, an oxazole group, an oxadiazole group, a pyridine group, a bipyridine group, a pyrimidine group, a triazine group, a triazole group, an acridine group. , pyridazine group, pyrazine group, quinoline group, quinazoline group, quinoxaline group, phthalazine group, pyridopyrimidine group, pyridopyrazine group, pyrazino pyrazine group, isoquinoline group, indole group, carbazole group, benzoxa Zol group, benzimidazole group, benzothiazole group, benzocarbazole group, benzothiophene group, dibenzothiophene group, benzofuran group, phenanthroline group, thiazole group, isoxazole group, oxadiazole group, thia A diazole group, a benzothiazole group, a phenothiazine group, a dibenzofuran group, a dihydrophenothiazine group, a dihydrobenzoisoquinoline group, a chromene group, and a chromenone group, but are not limited thereto.

In the present specification, the heterocyclic group may be monocyclic or polycyclic, and may be aromatic, aliphatic, or a condensed ring of aromatic and aliphatic, and may be selected from examples of the heterocyclic group.

In the present specification, the heteroaryl group refers to a monovalent aromatic heterocycle. Here, the aromatic heterocyclic ring is a monovalent group of an aromatic ring or a derivative of an aromatic ring, and refers to a group including at least one of N, O and S as heteroatoms in the ring. The derivative of the aromatic ring includes all structures in which an aromatic ring or an aliphatic ring is condensed on an aromatic ring. Also, in the present specification, the heteroaryl group is intended to include a monovalent group in which an aromatic ring containing two or more heteroatoms or a derivative of an aromatic ring containing heteroatoms is connected to each other. the heteroaryl group having 2 to 50 carbon atoms; 2 to 30; 2 to 20; 2 to 18; Or it is preferable that it is 2-13.

In the present specification, the ring may be an aromatic, aliphatic, or a condensed ring of aromatic and aliphatic, and may be selected from examples of the cycloalkyl group or aryl group except for the non-monovalent, and the condensed ring of aromatic and aliphatic. Examples include, but are not limited to, a 1,2,3,4-tetrahydronaphthalene group, a 2,3-dihydro-1H-indene group, and the like.

As used herein, "adjacent" group means a substituent substituted on an atom directly connected to the atom in which the substituent is substituted, a substituent sterically closest to the substituent, or another substituent substituted on the atom in which the substituent is substituted. can For example, two substituents substituted at an ortho position in a benzene ring and two substituents substituted at the same carbon in an aliphatic ring may be interpreted as "adjacent" groups.

In the present specification, the meaning of "adjacent groups combine with each other to form a substituted or unsubstituted ring" among substituents means a substituted or unsubstituted hydrocarbon ring by bonding with adjacent groups; Or it means to form a substituted or unsubstituted heterocyclic ring.

In an exemplary embodiment of the present specification, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted alkyl group; Or a substituted or unsubstituted cycloalkyl group, or combine with each other to form a substituted or unsubstituted ring.

In an exemplary embodiment of the present specification, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted C1-C30 alkyl group; Or a substituted or unsubstituted cycloalkyl group having 3 to 30 carbon atoms, or combine with each other to form a substituted or unsubstituted ring.

In an exemplary embodiment of the present specification, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted C1-C20 alkyl group; Or a substituted or unsubstituted cycloalkyl group having 3 to 20 carbon atoms, or combine with each other to form a substituted or unsubstituted ring.

In an exemplary embodiment of the present specification, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted C 1 to C 10 alkyl group; Or a substituted or unsubstituted cycloalkyl group having 3 to 10 carbon atoms, or combine with each other to form a substituted or unsubstituted ring.

In an exemplary embodiment of the present specification, R1 and R2 are the same as or different from each other, and each independently represents a substituted or unsubstituted alkyl group.

In an exemplary embodiment of the present specification, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted ethyl group; or a substituted or unsubstituted methyl group.

In an exemplary embodiment of the present specification, R1 and R2 are the same as or different from each other, and each independently an ethyl group substituted with a _{nitrile group, -CO 2} CH ₂ CH _{3 or a phenyl group;} or an ethyl group unsubstituted or substituted with a nitrile group.

In an exemplary embodiment of the present specification, R3 is hydrogen; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''R''''; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group.

In an exemplary embodiment of the present specification, R3 is CO ₂ R; -SO ₂ R';-COR''; or -CONR'''R''''.

In an exemplary embodiment of the present specification, R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group.

In an exemplary embodiment of the present specification, R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted C 1 to C 30 alkyl group; or a substituted or unsubstituted C6-C30 aryl group.

In an exemplary embodiment of the present specification, R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted C 1 to C 20 alkyl group; or a substituted or unsubstituted C6-C20 aryl group.

In an exemplary embodiment of the present specification, R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted C 1 to C 10 alkyl group; or a substituted or unsubstituted C6-C10 aryl group.

In an exemplary embodiment of the present specification, R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted methyl group; a substituted or unsubstituted ethyl group; a substituted or unsubstituted tert-butyl group; or a substituted or unsubstituted phenyl group.

In an exemplary embodiment of the present specification, R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; methyl group; ethyl group; tert-butyl group; or a phenyl group.

In an exemplary embodiment of the present specification, R3 is -CO ₂ R, R is hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted aryl group.

In an exemplary embodiment of the present specification, R is hydrogen; or a substituted or unsubstituted C1-C30 alkyl group.

In an exemplary embodiment of the present specification, R is hydrogen; or a substituted or unsubstituted C 1 to C 20 alkyl group.

In an exemplary embodiment of the present specification, R is hydrogen; or a substituted or unsubstituted C 1 to C 10 alkyl group.

In an exemplary embodiment of the present specification, R is hydrogen; a substituted or unsubstituted methyl group; or a substituted or unsubstituted ethyl group.

In an exemplary embodiment of the present specification, R4 and R5 are the same as or different from each other, and each independently hydrogen; -CN; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group.

In an exemplary embodiment of the present specification, R4 and R5 are the same as or different from each other, and each independently hydrogen; -CN; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''; a substituted or unsubstituted C6-C30 aryl group; Or a substituted or unsubstituted heterocyclic group having 3 to 30 carbon atoms.

In an exemplary embodiment of the present specification, R4 and R5 are the same as or different from each other, and each independently hydrogen; -CN; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''; a substituted or unsubstituted aryl group having 6 to 20 carbon atoms; Or a substituted or unsubstituted heterocyclic group having 3 to 20 carbon atoms.

In an exemplary embodiment of the present specification, R4 and R5 are the same as or different from each other, and each independently hydrogen; -CN; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''; a substituted or unsubstituted C6-C12 aryl group; Or a substituted or unsubstituted heterocyclic group having 3 to 12 carbon atoms.

In an exemplary embodiment of the present specification, R4 is -CN.

In an exemplary embodiment of the present specification, R6 to R8 are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted alkoxy group.

In an exemplary embodiment of the present specification, R5 to R8 are hydrogen.

In an exemplary embodiment of the present specification, the compound represented by Formula 1 is represented by any one of the following compounds.

The compound according to an exemplary embodiment of the present specification may be prepared by a manufacturing method described below. In the following preparations, representative examples are described, but if necessary, a substituent may be added or excluded, and the position of the substituent may be changed. In addition, based on techniques known in the art, starting materials, reactants, reaction conditions, etc. can be changed.

For example, the compound represented by Formula 1 may have a core structure as shown in Formula 1 below. Substituents may be combined by methods known in the art, and the type, position or number of substituents may be changed according to techniques known in the art. A substituent may be bonded as in the following general formula 1, but is not limited thereto.

[General formula 1]

In the general formula 1, the description of the substituents is the same as described above.

According to an exemplary embodiment of the present specification, there is provided a pressure-sensitive adhesive composition comprising the compound.

The pressure-sensitive adhesive composition further includes a polymer polymerized with an acrylic monomer.

The compound represented by Formula 1 included in the pressure-sensitive adhesive composition may be included in an amount of 0.01 to 10 parts by weight based on 100 parts by weight of the polymer polymerized with the acrylic monomer.

When the content of the compound represented by Formula 1 satisfies the above range, it may be more advantageous to provide a pressure-sensitive adhesive composition having excellent UV blocking performance including a blue region, optical properties of a polarizing plate, and durability. When the content of the compound is too high, it may affect the adhesive properties or cause crystallization.

The description to be described later applies to the polymer polymerized with the acrylic monomer.

Specifically, the polymer polymerized with the acrylic monomer may be a polymer polymerized with the first to third acrylic monomers.

In an exemplary embodiment of the present specification, the first acrylic monomer is 1 or 2 selected from the group consisting of isobornyl acrylate (IBOA) and isobornyl methacrylate (IBOMA).

In an exemplary embodiment of the present specification, the second acrylic monomer is 1 or 2 selected from the group consisting of hydroxyethyl acrylate (HEA) and hydroxyethyl methacrylate (HEMA).

In one embodiment of the present specification, the pressure-sensitive adhesive composition is hydroxybutyl acrylate (HBA), hydroxybutyl methacrylate (HBMA), hydroxypropyl acrylate (Hydroxypropyl acrylate: HPA) and One or two or more third acrylic monomers selected from the group consisting of hydroxypropyl metaacrylate (HPMA) may be further included.

In one embodiment, the polymer made of the acrylic monomer may be an alkyl (meth)acrylate. Specifically, the alkyl (meth) acrylate may be n-butyl methacrylate, but is not limited thereto.

The polymer polymerized with the acrylic monomer may be prepared through a known polymerization method. For example, a monomer mixture in which a (meth)acrylic acid ester monomer and a polar group-containing copolymerizable monomer and/or other comonomer are appropriately blended according to a desired weight ratio is used in solution polymerization, photo polymerization, The acrylic polymer can be prepared by applying a general polymerization method such as bulk polymerization, suspension polymerization, or emulsion polymerization. If necessary in the polymerization process, a polymerization initiator or a chain transfer agent may be used together.

In an exemplary embodiment of the present specification, the pressure-sensitive adhesive composition includes an epoxy compound. Examples of the epoxy compound include 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, bis(3,4-epoxycyclohexylmethyl)adipate, 3,4-epoxycyclohexylmethyl-3 , a caprolactone-modified product of 4-epoxycyclohexanecarboxylate, an ester product or a caprolactone-modified product of a polyhydric carboxylic acid and 3,4-epoxycyclohexylmethyl alcohol, a silicone compound having an alicyclic epoxy group at the terminal, and bisphenol A Diglycidyl ether, diglycidyl ether of bisphenol F, diglycidyl ether of brominated bisphenol A, phenol novolak type epoxy resin, cresol novolak type epoxy resin, biphenyl type epoxy resin, diglycidyl terephthalate Ester, phthalic acid diglycidyl ester, addition reaction product of terminal carboxylic acid polybutadiene and bisphenol A type epoxy resin, dicyclopentadiene dioxide, limonene dioxide, 4-vinylcyclohexene dioxide, polyethylene glycol (repeat 3 or more) di Glycidyl ether, polypropylene glycol (3 or more repetitions) diglycidyl ether, polytetramethylene glycol (3 or more repetitions) diglycidyl ether, hydrogenated bisphenol A diglycidyl ether, epoxidized vegetable oil, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxy Propylmethyldimethoxysilane, polybutadiene diglycidyl ether of hydroxyl groups at both terminals, internal epoxide of polybutadiene, and a compound in which the double bond of the styrene-butadiene copolymer is partially epoxidized [e.g., Daicel Chemical Industry ( "EPOPRENE" manufactured by Note)], and a compound in which the isoprene unit of a block copolymer of ethylene-butylene copolymer and polyisoprene is partially epoxidized (for example, "L-207" manufactured by KRATON), etc. can be heard

According to an exemplary embodiment of the present specification, the pressure-sensitive adhesive composition may contain additives such as antioxidants, stabilizers, and coupling agents. By adding the said additive, it can become an adhesive which has desired performance.

The antioxidant and the stabilizing agent may be appropriately used materials used in the art, but is not limited thereto.

The coupling agent may be a silane coupling agent. The silane coupling agent is v-glycidoxypropyltrimethoxysilane, v-glycidoxypropyltriethoxysilane, v-glycidoxypropylmethyldimethoxysilane, v-glycidoxypropylmethyldiethoxysilane, β -(3,4-epoxycyclohexyl)ethyltrimethoxysilane, β-(3,4-epoxycyclohexyl)ethyltriethoxysilane, β-(3,4-epoxycyclohexyl)ethylmethyldiethoxysilane, 1 or 2 or more selected from the group consisting of v-glycidoxypropyltriisopropenyloxysilane and v-glycidoxypropyltriiminooxysilane.

According to an exemplary embodiment of the present specification, there is provided a polarizing plate including the pressure-sensitive adhesive composition or a cured product thereof.

The pressure-sensitive adhesive composition or a cured product thereof forms a pressure-sensitive adhesive layer.

Specifically, the polarizer may include a polarizer; a pressure-sensitive adhesive layer provided on at least one surface of the polarizer and comprising the above-described pressure-sensitive adhesive composition or a cured product thereof; and a protective film provided on at least one surface on the pressure-sensitive adhesive layer.

The polarizer is not particularly limited, and a polarizer well known in the art, for example, a film made of polyvinyl alcohol (PVA) containing iodine or a dichroic dye may be used. The polarizer may be manufactured by dyeing the PVA film with iodine or a dichroic dye, but the manufacturing method thereof is not particularly limited. In the present specification, a polarizer means a state that does not include a protective film, and a polarizer means a state that includes a polarizer and a protective film.

Next, the pressure-sensitive adhesive layer to include the pressure-sensitive adhesive composition according to the embodiments of the present specification described above, may be formed by a method well known in the art. For example, the pressure-sensitive adhesive composition may be applied to one surface of a polarizer or a protective film to form a pressure-sensitive adhesive layer, and then the polarizer and the protective film may be laminated and then cured. In this case, the coating may be performed by coating methods well known in the art, for example, spin coating, bar coating, roll coating, gravure coating, blade coating, and the like. For the curing, a thermosetting method may be applied, and a thermosetting method used in the art may be appropriately applied.

On the other hand, the thickness of the pressure-sensitive adhesive layer is preferably greater than 0 to about 30 µm or less, more than 0 to about 10 µm or less, and preferably about 0.1 µm to 10 µm or 1 µm to 7 µm. When the thickness of the pressure-sensitive adhesive layer is too thin, the uniformity and adhesion of the pressure-sensitive adhesive layer may be reduced, and if the thickness of the pressure-sensitive adhesive layer is too thick, the appearance of the polarizing plate may be wrinkled.

The protective film is for supporting and protecting the polarizer, and protective films of various materials generally known in the art, for example, a cellulose-based film, a polyethylene terephthalate (PET, polyethylene terephthalate) film, a cycloolefin polymer (COP, cycloolefin polymer) film, acrylic film, etc. may be used without limitation. Among them, in consideration of optical properties, durability, economical efficiency, etc., it is particularly preferable to use an acrylic film.

Meanwhile, the polarizing plate of the present specification may further include a primer layer between the pressure-sensitive adhesive layer and the protective film to further improve adhesion. In this case, the primer layer may be formed by applying a coating solution containing a water-dispersible polymer resin, water-dispersible fine particles, and water on the protective film using a bar coating method, a gravure coating method, or the like and drying. The water-dispersible polymer resin may be, for example, a water-dispersible polyurethane-based resin, a water-dispersed acrylic resin, a water-dispersed polyester-based resin, or a combination thereof, and the water-dispersible fine particles include inorganic particles such as silica, titania, alumina, and zirconia. However, organic fine particles made of silicone-based resin, fluorine-based resin, (meth)acrylic resin, cross-linked polyvinyl alcohol and melamine-based resin or a combination thereof may be used, but the present invention is not limited thereto.

An exemplary embodiment of the present specification provides an image display device including the polarizing plate.

Specifically, the image display device includes a display panel; and a polarizing plate according to the above-described embodiment provided on one or both surfaces of the display panel.

The display panel may be a liquid crystal panel, a plasma panel, and an organic light emitting panel.

Accordingly, the image display device may be a liquid crystal display device (LCD), a plasma display device (PDP), and an organic light emitting display device (OLED).

More specifically, the image display device may be a liquid crystal display device including a liquid crystal panel and polarizing plates provided on both sides of the liquid crystal panel, wherein at least one of the polarizing plates is according to the exemplary embodiment of the present specification described above. It may be a polarizing plate including a polarizer. That is, the polarizing plate is a polarizing plate including a polyvinyl alcohol-based polarizer dyed with iodine and/or a dichroic dye and a protective film provided on at least one surface of the polyvinyl alcohol-based polarizer. has a depolarization region having a single transmittance of 80% or more, an arithmetic mean roughness (Ra) of 200 nm or less, a polarization degree of 10% or less, and a sagging of 10 μm or less of the depolarization region.

In this case, the type of the liquid crystal panel included in the liquid crystal display device is not particularly limited. For example, it is not limited to the type, TN (twisted nematic) type, STN (super twisted nematic) type, F (ferroelectic) type or PD (polymer dispersed) type panels such as passive matrix type; an active matrix type panel such as a two terminal type or a three terminal type; All known panels such as an In Plane Switching (IPS) panel and a Vertical Alignment (VA) panel may be applied. In addition, other components constituting the liquid crystal display device, for example, the types of upper and lower substrates (eg, color filter substrates or array substrates), etc. are not particularly limited, and configurations known in this field are not limited. can be employed

Hereinafter, examples will be given to describe the present specification in detail. However, the embodiments according to the present specification may be modified in various other forms, and the scope of the present application is not to be construed as being limited to the embodiments described below. The embodiments of the present application are provided to more completely explain the present specification to those of ordinary skill in the art.

<Production Example>

Preparation of compound 1

Preparation of compound 1-1

6-chloronicotinaldehyde (20g, 142mmol) and dimethylamine (10% in THF) (10g, 213mmol) 95g of N,N-dimethylformamide (N,N-dimethylformamide) 100mL After being put into the was heated to 80 ℃. After the reaction was completed, it was cooled to room temperature, diluted with ethyl acetate, washed with water three times, and the collected organic layers were treated with anhydrous magnesium sulfate, filtered, and then concentrated under reduced pressure. 14.5 g (68% yield) of Compound 1-1 was prepared by separation through silica gel column chromatography.

Preparation of compound 1

Compound 1-1 (20g, 133mmol) and ethyl 2-cyanoacetate (16.6g, 147mmol) were dissolved in 100mL of 1,4-dioxane, and then 2N NaOH 10 mL was added and warmed to 80°C. Upon completion of the reaction, the reaction was cooled to room temperature, 100 mL of water was slowly added, and the precipitated solid was filtered. The filtered solid was again slurried with EtOH to obtain 26.8 g (82% yield) of the target compound 1. MS:[M+H] ⁺ = 246

Preparation of compound 2

Preparation of compound 2-1

Dibenzylamine (30.1 g, 156 mmol) was used instead of dimethylamine to prepare 26.1 g (75% yield) of Compound 2-1 by the same experiment as in Preparation Example of Compound 1-1.

Preparation of compound 2

Compound 2-1 (15 g, 61.2 mmol) and 2-cyanoacetic acid (5.72 g, 67.3 mmol) were added to 100 mL of 1,4-dioxane, and 10 mL of 2N NaOH was added and heated to 80 °C. did. Upon completion of the reaction, the reaction was cooled to room temperature, adjusted to neutral pH by addition of 2N HCl, and the precipitated solid was filtered. The filtered solid was slurried with hexane and isopropyl alcohol solvent to prepare 17.2 g (76%) of the target compound 2. MS:[M+H] ⁺ = 370

Preparation of compound 3

Preparation of compound 3-1

By using 3-(methylamino)propanenitrile (20g, 142 mmol) instead of dimethylamine, the same experiment as in Preparation Example of Compound 1-1 was used to prepare 19.3 g (72% yield) of Compound 3-1.

Preparation of compound 3

Compound 3-1 (20 g, 106 mmol) and 2-(phenylsulfonyl) acetonitrile (20.1 g, 111 mmol) were added to 150 mL of ethanol, and then 0.1 mL of piperidine was added to warm up. Upon completion of the reaction, the mixture was cooled to room temperature, concentrated under reduced pressure, the concentrated compound was dissolved in ethyl acetate, and the organic layer was separated by washing with water three times. Anhydrous magnesium sulfate was added to the organic layer thus obtained to remove water, filtered, and concentrated under reduced pressure. The concentrated compound was separated through silica gel column chromatography to prepare 12.4 g (49% yield) of the target compound 3 . MS:[M+H] ⁺ = 353

Preparation of compound 4

Preparation of compound 4

Compound 1-1 (20g, 133 mmol) and 3-oxo-3-phenylpropanenitrile (21.3g, 146.6 mmol) were used in the same experiment as in Preparation Example of Compound 3 to prepare 29.5 g (80% yield) of the target compound 4 did. MS:[M+H] ⁺ = 278

Preparation of compound 5

Preparation of compound 5

Compound 2-1 (20g, 66 mmol) and N-(tert-butyl)-2-cyanoacetamide (10.2g, 72.8 mmol) were used in the same experiment as in Preparation Example of Compound 3, and 19.9 g (71%) of the target compound 5 yield) was prepared. MS:[M+H] ⁺ = 425

<Example>

Example 1

[Preparation of adhesive composition]

99 parts by weight of n-butyl acrylate (n-BA) and 1 part by weight of 2-hydroxybutyl acrylate (2-HBA) were introduced into a 1L reactor in which nitrogen gas was refluxed and a cooling device was installed to facilitate temperature control, , nitrogen gas was purged for 60 minutes to remove oxygen. Thereafter, the temperature was maintained at 67° C., and 0.05 parts by weight of azobisisobutyronitrile (AIBN) as a reaction initiator was added, and the reaction was performed for 8 hours. After the reaction, it was diluted with ethyl acetate to prepare an acrylic polymer having a solid concentration of 30 wt% and a weight average molecular weight of 1000,000 g/mol.

Based on 100 parts by weight of the prepared acrylic polymer, 1.5 parts by weight of the compound represented by Compound 1 as a UV absorber, a crosslinking agent (XDI-based isocyanate, T-39M manufactured by Mitsuichemicals) and a silane coupling agent (T-78J, manufactured by Shinetsu) A pressure-sensitive adhesive composition was prepared by mixing with a solvent so that the solid content concentration was 30% by weight.

[Preparation of adhesive layer]

After drying the prepared pressure-sensitive adhesive composition on the release-treated surface of the release-treated PET (poly(ethyl eneterephthalate)) film (thickness: 38 μm, MRF-39, manufactured by Mitsubishi) to have a thickness of 7 μm, and then coated at 80° C. The pressure-sensitive adhesive layer was prepared by thermosetting in an oven for 3 minutes.

[Manufacture of polarizing plate]

The polyvinyl alcohol-based resin film was stretched, dyed with iodine, and treated with an aqueous boric acid solution to prepare a polarizer. Then, a 60 μm thick TAC (triacetyl cellulose) film was attached to one surface of the polarizer with a water-based polyvinyl alcohol-based adhesive. Then, in the polyvinyl alcohol-based polarizer, one side of the prepared pressure-sensitive adhesive layer was laminated on the surface to which the TAC film was not attached using the same water-based polyvinyl alcohol-based adhesive as described above to prepare a polarizing plate.

Example 2

In Example 1, a pressure-sensitive adhesive composition, a pressure-sensitive adhesive layer, and a polarizing plate were prepared in the same manner as in Example 1 except that the material of Compound 2 was used instead of Compound 1.

Example 3

In Example 1, a pressure-sensitive adhesive composition, a pressure-sensitive adhesive layer, and a polarizing plate were prepared in the same manner as in Example 1, except that the material of Compound 3 was used instead of Compound 1.

Example 4

In Example 1, a pressure-sensitive adhesive composition, a pressure-sensitive adhesive layer, and a polarizing plate were prepared in the same manner as in Example 1, except that the material of Compound 4 was used instead of Compound 1.

Example 5

In Example 1, a pressure-sensitive adhesive composition, a pressure-sensitive adhesive layer, and a polarizing plate were prepared in the same manner as in Example 1, except that the material of Compound 5 was used instead of Compound 1.

<Comparative example>

Comparative Example 1

A pressure-sensitive adhesive composition, a pressure-sensitive adhesive layer, and a polarizing plate were prepared in the same manner as in Example 1 except that the ultraviolet absorber was not used in Example 1.

Comparative Example 2

A pressure-sensitive adhesive composition, a pressure-sensitive adhesive layer, and a polarizing plate were prepared in the same manner as in Example 1, except that a compound of Formula A was used instead of the compound represented by Formula 1 applied as the UV absorber in Example 1.

[Formula A]

Evaluation Example 1 Evaluation of optical properties of a polarizing plate

A specimen was prepared by cutting the polarizing plate prepared in Examples and Comparative Examples to a size of 25 mm × 25 mm (width × length). By measuring the transmittance of the polarizing plate using an ultraviolet-visible spectrometer (V-7100, manufactured by JASCO), the UV blocking performance including the blue region was evaluated, and the results are shown in Table 1. The light transmittance in Table 1 below shows the light transmittance as a percentage of the total light transmittance when the total light transmittance is set to 100.

Evaluation Example 2 Evaluation of Color Characteristics of Polarizing Plates

A specimen was prepared by cutting the polarizing plate prepared in Examples and Comparative Examples to a size of 25 mm × 25 mm (width × length). The luminous properties of the polarizing plate were evaluated by measuring the ab color value of the polarizing plate using an ultraviolet and visible spectrometer (V-7100, manufactured by JASCO), and the results are shown in Table 1. In the ab color value of the polarizing plate of Table 1, it can be confirmed that, in particular, the change in the b value is not large, so that the luminous property is excellent.

Evaluation Example 3 Durability evaluation under reliability conditions

Two specimens prepared by cutting the polarizing plates prepared in Examples and Comparative Examples to a size of 90 mm × 170 mm (width × length) were prepared for each Example and Comparative Example, respectively. Next, two prepared specimens were attached to both sides of a glass substrate (110 mm × 190 mm × 0.7 mm = width × length × thickness) so that the optical absorption axis of each polarizing plate crossed to prepare a sample. The pressure applied at the time of the attachment was about 5 Kg/cm 2 , and the operation was performed in a clean room to prevent bubbles or foreign substances from being generated at the interface. After the prepared sample was put into a reliability chamber and left for 1,000 hours under conditions of a temperature of 60° C. and a relative humidity of 90%, it was observed whether lifting occurred at the interface of the pressure-sensitive adhesive layer. Durability evaluation criteria are as follows.

<Durability evaluation criteria>

◎: No lifting

○: slight lifting occurs

△: Lifting occurs

×: A large amount of floating occurs

Optical Characteristics of Polarizer color value of polarizer durability 380nm 410nm a b Example 1 0.00964 0.86813 -3.47596 6.81665 ◎ Example 2 0.0077 0.36083 -4.08728 7.92232 ◎ Example 3 0.00009 1.93391 -2.11241 4.49116 ◎ Example 4 0.02052 2.95266 -2.89452 5.79614 ◎ Example 5 0.1105 2.63084 -2.74404 5.56437 ◎ Comparative Example 1 0.24822 32.7043 -1.02422 2.37472 ◎ Comparative Example 2 0.0411 0.15561 -12.8472 23.49686 ◎

According to Table 1, it can be seen that Examples 1 to 5 exhibit low transmittance with respect to light having a wavelength of 380 nm to 410 nm, and have excellent UV blocking properties and excellent visibility properties.

10: polarizer
20: image display device
100: polarizer
101: protective layer
102: adhesive layer
103: protective film
201: liquid crystal display panel
202: first polarizing plate
203: second polarizing plate
204: light source unit

Claims (10)

A compound represented by the following formula (1):
[Formula 1]

In Formula 1,
R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted alkyl group; Or a substituted or unsubstituted cycloalkyl group, or combine with each other to form a substituted or unsubstituted ring,
R3 is hydrogen; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''R''''; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group,
R4 and R5 are the same as or different from each other, and each independently hydrogen; -CN; -CO ₂ R; -SO ₂ R';-COR'';-CONR'''R''''; a substituted or unsubstituted aryl group; Or a substituted or unsubstituted heterocyclic group,
R, R', R'', R''' and R'''' are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted alkyl group; Or a substituted or unsubstituted aryl group,
R6 to R8 are the same as or different from each other, and each independently hydrogen; a substituted or unsubstituted alkyl group; or a substituted or unsubstituted alkoxy group. The compound of claim 1, wherein R4 is -CN. The method according to claim 1, R3 is -CO ₂ R; -SO ₂ R';-COR'';-CONR'''R'''',
R, R', R'', R''' and R'''' are the same as those defined in Formula 1 above. The compound of claim 1, wherein R5 to R8 are hydrogen. The compound of claim 1, wherein R1 and R2 are the same as or different from each other, and each independently represents a substituted or unsubstituted alkyl group. The method according to claim 1, R1 and R2 are the same as or different from each other, and each independently a substituted or unsubstituted methyl group; Or a compound that is a substituted or unsubstituted ethyl group. The method according to claim 1, wherein the compound represented by Formula 1 is a compound represented by any one of the following compounds:

. A pressure-sensitive adhesive composition comprising the compound according to any one of claims 1 to 7. A polarizing plate comprising the pressure-sensitive adhesive composition according to claim 8 or a cured product thereof. An image display device comprising the polarizing plate according to claim 9 .

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