TWI646185B - Antistatic agent, adhesive composition using the same, display device, and polarizing plate - Google Patents

Abstract

An antistatic agent includes a first monomer unit shown in the following Formula 1 and a second monomer unit shown in the following Formula 2:

Among them, R1 is H or C1 alkyl, R2 is C1 to C6 alkyl, R3 is C1 to C8 alkyl, R4 is C2 to C6 alkyl, M is group 13 to 15 element, and X is group 17 element or R Electron group, n is 2 ~ 6. The first monomer unit accounts for 50% to 70% of the total moles of the monomer units, and the second monomer unit accounts for 30% to 40% of the total moles of the monomer units.

Description

Antistatic agent, adhesive composition applied thereto, display device, And polarizer

The invention relates to an antistatic agent, an adhesive composition using the same, a display device, and a polarizing plate.

In order to protect the product, during the period from the completion of the product to the sale to the customer, various protection methods are often provided, including a protective film directly attached to the product, a shock-proof and impact-resistant packaging material, and the like. Taking a display device as an example, whether it is a TV, a computer screen, a tablet, or a mobile phone, a surface protective film is often attached to the side of the screen to prevent the screen from being damaged by friction during transportation. This layer of surface protection film will be removed when using the display device to avoid the use experience such as visual effects being affected by it. The surface protection film is usually a component that is adhered to the outermost layer of the display device on the screen side through an adhesive layer. The adhesive layer can be formed by an adhesive composition, and its specific components can be appropriately adjusted according to requirements.

In one aspect of the invention, an antistatic agent is provided. Such an antistatic agent includes a first monomer unit as shown in the following formula 1 and a second monomer unit as shown in the following formula 2:

Among them, R1 is independently H or C1 alkyl, R2 is independently C1 ~ C6 alkyl, R3 is independently C1 ~ C8 alkyl, R4 is independently C2 ~ C6 alkyl, and M is independently It is a group 13 to 15 element, X is independently a group 17 element or an electron-drawing group, and n is independently 2 to 6. The first monomer unit accounts for 50% to 70% of the total moles of the monomer units, and the second monomer unit accounts for 30% to 40% of the total moles of the monomer units.

In another aspect of the present invention, there is provided an adhesive composition to which the aforementioned antistatic agent or an antistatic agent based on which is further adjusted. This adhesive The composition includes a main agent, a bridging agent, and an antistatic agent as described above. Relative to 100 parts by weight of the main agent, the bridging agent is 0.1 to 1.0 parts by weight, and the antistatic agent is 1.0 to 5.0 parts by weight.

In still another aspect of the present invention, a display device using such an adhesive composition or an adhesive composition further adjusted based on the same is provided. Such a display device includes a display panel, an optical film, and an adhesive layer. The optical film is disposed on the display panel. The adhesive layer is disposed on the optical film. The adhesive layer adheres a surface protective film for a display device to an optical film. The adhesive layer is formed of the adhesive composition as described above.

In yet another aspect of the present invention, there is provided an adhesive composition of the aforementioned antistatic agent or an antistatic agent based on the antistatic agent. Such an adhesive composition includes a main agent, a photoinitiator, and an antistatic agent as described above. The main agent includes a difunctional (meth) acrylate monomer, a monofunctional (meth) acrylate monomer, and a hydroxyl-containing (meth) acrylate monomer, among which the difunctional (meth) acrylate The monomer has a binary unsaturated bond per molecule and the total number of carbon atoms is less than 10. The total weight of the bifunctional (meth) acrylate monomer, monofunctional (meth) acrylate monomer, hydroxyl (meth) acrylate-containing monomer, photoinitiator, and antistatic agent is 100 Parts by weight, bifunctional (meth) acrylate monomers account for 30 to 75 parts by weight, monofunctional (meth) acrylate monomers account for 10 to 60 parts by weight, and hydroxyl-containing (meth) acrylate monomers account for 1 to 50 parts by weight, 5 to 10 parts by weight of the photoinitiator, and 0.5 to 5 parts by weight of the antistatic agent.

In still another aspect of the present invention, there is provided a polarizing plate using such an adhesive composition or an adhesive composition further adjusted based on the same. The polarizing plate includes a polarizing film, two protective films, and two adhesive layers. Two protective films are configured separately On the upper and lower surfaces of the polarizing film. The two adhesive layers are respectively disposed between the polarizing film and the two protective films, and the two adhesive layers are formed of the adhesive composition as described above.

In order to have a better understanding of the above and other aspects of the present invention, the embodiments and examples are given below and described in detail with the accompanying drawings as follows:

100‧‧‧ display device

110‧‧‧display panel

120‧‧‧ Optical Film

130‧‧‧ Adhesive layer

140‧‧‧surface protection film

200‧‧‧ polarizing plate

210‧‧‧polarizing film

220‧‧‧ Adhesive layer

230‧‧‧ protective film

FIG. 1 is a schematic diagram of a display device according to an embodiment.

FIG. 2 is a schematic view of a polarizing plate according to an embodiment.

In one aspect of the invention, an antistatic agent is provided. This kind of antistatic agent is an acrylic antistatic agent which is polymerized from acrylate monomers with different characteristics. Specifically, the antistatic agent according to the embodiment includes a first monomer unit as shown in the following Formula 1 and a second monomer unit as shown in the following Formula 2:

[Formula 2] Among them, R1 is independently H or C1 alkyl, R2 is independently C1 ~ C6 alkyl, R3 is independently C1 ~ C8 alkyl, R4 is independently C2 ~ C6 alkyl, and M is independently It is a group 13 to 15 element, X is independently a group 17 element or an electron-drawing group, and n is independently 2 to 6. The “respectively independent” means that in the antistatic agent, each monomer unit may have the same or different functional groups. For example, the two first monomer units may have the same or different R1. For another example, a first monomer unit and a second monomer unit connected thereto may have the same or different R1. In addition, the carbon numbers of R1, R2, R3, and R4 may be different or the same, and there is no particular limitation. The first monomer unit accounts for 50% to 70% of the total moles of the monomer units, and the second monomer unit accounts for 30% to 40% of the total moles of the monomer units. In some embodiments, the antistatic agent may further include a third monomer unit as shown in Formula 3 below: Wherein, R1 is independently H or C1 alkyl, and R5 is independently C1 to C8 alkyl, as described above. The third monomer unit accounts for less than 20% of the total moles of the monomer unit.

As shown in Formula 1, the first monomer unit includes a cationic quaternary ammonium functional group and an anion M . Thereby, the antistatic agent according to the embodiment can provide an antistatic function. As mentioned above, R2 in the quaternary ammonium functional group is a C1-C6 alkyl group, and R3 is a C1-C8 alkyl group. M M in the group is a group 13 to 15 element, X is a group 17 element or an electron-withdrawing group, and n is 2 to 6. Specifically, according to some embodiments, the electron-withdrawing group as X may be a functional group represented by the following Formula 4 to Formula 7:

Among them, m is 1 to 5. For example, in some embodiments, the anion M of the first monomer unit They are independently tetrafluoroborate, hexafluorophosphate, hexafluoroantimonate, fluorine-containing sulfonimide, perfluoroalkylsulfonyl, fluorosulfonyl, and bis (fluorosulfonyl) sulfonium Root, bis (trifluoromethanesulfonyl) fluorenimide, bissulfonylfluorenimide, hexafluoroantimonate, or tetrakis (fluorophenyl) borate. Among them, the perfluoroalkylsulfonyl group may be, for example, a trifluoromethanesulfonyl group, a pentafluoroethanesulfonyl group, or the like. The bissulfinofluorenimide may be, for example, bis (pentafluoroethanesulfonyl) sulfenimide and the like.

As shown in Formula 2, the second monomer unit includes a hydroxyl group (-OH). Thus, in some embodiments applied to the adhesive composition, the antistatic agent according to the embodiment can react with the bridging agent in the adhesive composition, and further cross-link with the host in the adhesive composition by the bridging agent. The agent is connected to be fixed in the adhesive layer formed by the adhesive composition in a bonding manner, which can further prevent the generation of precipitates caused by the aggregation and precipitation of the antistatic agent.

For example, in some embodiments, the total number of moles of all monomer units (ie, the total number of moles of monomer units) is 100%, and the antistatic agent may be 50% to 70% of the first monomer units. , 30% to 40% of the second monomer unit, and 0 to 20% of the third monomer unit. For example, in some embodiments, the antistatic agent may have a fragment as shown in Formula 8: Among them, x, y, and z are positive integers. Of course, it can be understood that the first monomer unit, the second monomer unit, and the third monomer unit need not be arranged in the order shown in Formula 8.

The antistatic agent according to the above embodiment can be applied to an adhesive composition. In one aspect of the present invention, the antistatic agent is used in a pressure-sensitive adhesive composition. Therefore, an adhesive composition is provided, which can be a pressure-sensitive adhesive composition. Such an adhesive composition according to the embodiment includes a main agent, a bridging agent, and an antistatic agent according to the embodiment. Relative to 100 parts by weight of the main agent, the bridging agent is 0.1 to 1.0 parts by weight, and the antistatic agent is 1.0 to 5.0 parts by weight. In some embodiments, the adhesive composition may further include a silane coupling agent. The silane coupling agent is 0.1 to 1.0 parts by weight based on 100 parts by weight of the main agent.

For example, in some embodiments, the base agent may include at least one (meth) acrylate. Since the methyl group belongs to a smaller functional group, in the technical field to which the present invention belongs, many components can also be applied in the case of replacing the hydrogen with a methyl group. Therefore, for simplicity, "(methyl)" is used to indicate the application of these two cases. For example, (meth) acrylates include both acrylates and methacrylates. According to some embodiments, at least one (meth) acrylate used may be methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate , N-octyl (meth) acrylate, undecyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, ethoxymethyl (meth) acrylate, benzyl (meth) acrylate, 2-phenoxyethyl (meth) acrylate, (meth) acrylic acid 2- (2-phenoxyethoxy) ethyl ester, (meth) acrylate of nonylphenol modified by ethylene oxide, and / or 2- (o-phenylphenoxy) (meth) acrylate ) Ethyl.

For example, in some embodiments, the bridging agent may be an isocyanate-based compound having at least two isocyanate groups (-NCO) in the molecule. According to some embodiments, the isocyanate-based compound used may be toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, ditolyl diisocyanate, hydrogenated diisocyanate, Diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate. According to some embodiments, the isocyanate-based compound used may be a dimer of any of the foregoing, a trimer of any of the foregoing, and / or an adduct formed by the reaction of any of the foregoing and a polyol.

For example, according to some embodiments, the silane coupling agent may be vinyltrimethoxysilane, vinyltriethoxysilane, vinyl ginseng (2-methoxyethoxy) silane, 3-methacryloxy Propyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyl Methyldimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylethoxydimethylsilane, 3-aminopropyltrimethoxy Silane, 3-aminopropyltriethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-amine Propylmethyldimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane, and / Or 3-mercaptopropyltrimethoxysilane.

The adhesive composition according to the above embodiment can be applied to a display device. Therefore, in another aspect of the present invention, a display device is provided. As shown in FIG. 1, the display device 100 includes a display panel 110, an optical film 120, and an adhesive layer. Layer 130. The display panel 110 is, for example, a liquid crystal display panel. The optical film 120 is disposed on the display panel 110. The optical film 120 may be a single-layer or multi-layer film, which may be for gain, alignment, compensation, steering, orthogonal, diffusion, protection, anti-stick, scratch resistance, anti-glare, reflection suppression, high refractive index, etc. Beneficial Film. For example, the optical film 120 may be, but is not limited to, a polarizing film, a release film, a wide viewing angle film, a brightness enhancement film, a reflective film, a protective film, an alignment liquid crystal film with characteristics such as controlling viewing angle compensation or birefraction. , Various surface treatment films such as easy-to-bond treatment film, hard coating film, anti-reflection film, anti-adhesive film, diffusion film, anti-glare film, or a combination thereof. The adhesive layer 130 is disposed on the optical film 120. The adhesive layer 130 adheres the surface protective film 140 for the display device 100 to the optical film 120. The adhesive layer 130 is formed of the adhesive composition according to the above embodiment. For example, the adhesive composition may be coated on the optical film 120, and then the adhesive composition is dried to form the adhesive layer 130. The surface protective film 140 is torn off, for example, when a customer wants to use the display device 100 after being sold.

The adhesive composition according to the embodiment includes an antistatic agent, and in the case where the surface protection film and the outermost element (such as an optical film) on the screen side of the display device to which it is attached are both insulators, electrostatic reactions can be avoided. Causes the display device to be damaged or contaminated. According to some embodiments, the adhesive layer formed of the adhesive composition according to the embodiment has a surface resistance of 10 ¹² Ω / □ or less.

In addition, in the adhesive composition according to the above-mentioned embodiment, the bridging agent may link the antistatic agent according to the embodiment to the main agent. Taking a bridging agent having an isocyanate group as an example, it can perform a reaction shown in Formula 9: [Formula 9] Among them, R represents the other part of the bridging agent, and R ′ represents the other part of the main agent, the antistatic agent according to the embodiment, and even the silanols generated after hydrolysis of the silane coupling agent. By this reaction, a bridging agent having two or more isocyanate groups can link the antistatic agent according to the embodiment to other components of the adhesive composition, for example, to the main agent. Therefore, the antistatic agent according to the embodiment can be fixed in the adhesive layer formed by the adhesive composition by means of bonding, so as not to migrate or even precipitate in the adhesive layer to cause precipitation. In contrast, generally used antistatic agents are small molecule additives that do not have hydroxyl groups, which are easy to migrate or even precipitate in the adhesive layer due to thermal movement, causing problems with the precipitates. Especially in high temperature or high temperature and humidity environment, the problem of precipitates will be more serious.

In another aspect of the present invention, the antistatic agent is applied to a photocurable adhesive composition, and is particularly applicable to a UV adhesive composition. Therefore, an adhesive composition is provided herein, which is particularly a photocurable adhesive composition. Such an adhesive composition according to an embodiment includes a main agent, a photoinitiator, and an antistatic agent according to an embodiment. The main agent includes a difunctional (meth) acrylate monomer, a monofunctional (meth) acrylate monomer, and a hydroxyl-containing (meth) acrylate monomer, among which the difunctional (meth) acrylate The monomer has a binary unsaturated bond per molecule and the total number of carbon atoms is less than 10. Difunctional (meth) acrylate monomers, monofunctional (meth) acrylate monomers, hydroxyl-containing (meth) acrylate monomers, The total weight of the initiator and the antistatic agent is 100 parts by weight. The bifunctional (meth) acrylate monomer accounts for 30 to 75 parts by weight, and the monofunctional (meth) acrylate monomer accounts for 10 to 60 parts by weight. The hydroxyl-containing (meth) acrylate monomer accounts for 1 to 50 parts by weight, the photoinitiator accounts for 5 to 10 parts by weight, and the antistatic agent accounts for 0.5 to 5 parts by weight.

For example, in some embodiments, the difunctional (meth) acrylate monomer may be ethylene glycol di (meth) acrylate, butanediol di (meth) acrylate, resorcinol di (Meth) acrylate, and / or hydroquinone di (meth) acrylate.

For example, in some embodiments, the monofunctional (meth) acrylate monomer may be methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, (methyl) ) N-butyl acrylate, n-octyl (meth) acrylate, undecyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, (meth) Isooctyl acrylate, 2-methoxyethyl (meth) acrylate, ethoxymethyl (meth) acrylate, benzyl (meth) acrylate, 2-phenoxyethyl (meth) acrylate, 2- (2-phenoxyethoxy) ethyl (meth) acrylate, (meth) acrylate of nonylphenol modified by ethylene oxide, and / or 2- (ortho) (meth) acrylate -Phenylphenoxy) ethyl ester.

For example, in some embodiments, the hydroxyl-containing (meth) acrylate monomer may be an acrylate comprising [Formula 2]: [Formula 2] Among them, R1 is independently H or C1 alkyl, and R4 is independently C2-C6 alkyl. Specifically, the hydroxy (meth) acrylate-containing monomer may be hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, trimethylol Propane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, phenylepoxypropyl (meth) acrylate, and / or (meth) acrylic acid Lactone adduct.

For example, in some embodiments, the photoinitiator can be 2-hydroxy-2-methyl-1-phenylacetone, 1-hydroxycyclohexylphenylmethanone, methyl-2- (4-? (Pinolinyl) -1- [4- (methylthio) phenyl] -1-acetone, 2,4,6-trimethylbenzylidene-diphenylphosphine oxide, 2,4,6-trimethyl Ethyl benzamidinephenylphosphonate, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl] -1-butanone, 2-hydroxy-2- Methyl-1- [4- (2-hydroxyethoxy) phenyl] -1-acetone, and / or methyl benzamate.

The adhesive composition according to the above embodiment can be applied to a polarizing plate. Therefore, in another aspect of the present invention, a polarizing plate is provided. As shown in FIG. 2, the polarizing plate 200 includes a polarizing film 210, an adhesive layer 220, and a protective film 230. In some embodiments, there may be only one protective film 230 disposed on the upper or lower surface of the polarizing film 210 and only one adhesive layer 220 disposed on the polarizing film 210 And the protective film 230 to adhere the protective film 230 to the polarizing film 210. In other embodiments, as shown in FIG. 2, two protective films 230 are respectively disposed on the upper surface and the lower surface of the polarizing film 210, and two adhesive layers 220 are respectively disposed on the polarizing film 210 and the two protective films. 230 to adhere the protective film 230 to the polarizing film 210. The adhesive layer 220 is formed of the adhesive composition according to the embodiment described above. The number of the protective film 230 and the corresponding adhesive layer 220 need not be particularly limited.

The adhesive composition according to the embodiment includes an antistatic agent, and in a case where both the protective film and the polarizing film are insulators, the polarizing film can be prevented from being damaged or polluted by an electrostatic reaction. According to some embodiments, the adhesive layer formed of the adhesive composition according to the embodiment has a surface resistance of 10 ¹² Ω / □ or less.

Specific examples and comparative examples are provided below to provide a further understanding of the antistatic agent and the adhesive composition according to the embodiment.

[Sample preparation]

[Example 1]

Acrylic 0.06 moles of the first monomer unit where R1 is a C1 alkyl group, R2 is a C2 alkyl group, and R3 is a C2 alkyl group, and the second monomer unit of R1 is a C1 alkyl group and R4 is a C2 alkyl group The acrylate was 0.03 mol, and the acrylate of the third monomer unit having R1 as H and R5 as C8 alkyl group was provided with 0.01 mol. The acrylate was mixed and polymerized at 70 ° C. for 7 hours. After that, 3 parts by weight were mixed with 100 parts by weight of n-octyl acrylate, 0.4 parts by weight of toluene diisocyanate, and 0.3 parts by weight of vinyltrimethoxysilane, and matured in an environment of 23 ° C / RH 65% for 7 days to form an adhesive. Composition finished product.

[Example 2]

Acrylic 0.06 moles of the first monomer unit where R1 is a C1 alkyl group, R2 is a C2 alkyl group, and R3 is a C2 alkyl group, and the second monomer unit of R1 is a C1 alkyl group and R4 is a C3 alkyl group Acrylate was 0.03 mol, and 0.01 mol of acrylate was provided for the third monomer unit in which R1 is H and R5 is a C4 alkyl group. The acrylate was mixed and polymerized at 75 ° C for 5 hours. After that, 4 parts by weight were mixed with 100 parts by weight of n-octyl acrylate, 0.4 parts by weight of toluene diisocyanate, and 0.3 parts by weight of vinyltrimethoxysilane, and matured at 23 ° C / humidity RH65% for 7 days to form an adhesive. Composition finished product.

[Example 3]

Acrylate 0.07 moles of the first monomer unit R1 is H, R2 is a C2 alkyl group, and R3 is a C2 alkyl group, and 0.03 acrylates of the second monomer unit R1 is H and R4 is a C2 alkyl group Mol was mixed, and a polymerization reaction was performed at 80 ° C for 3 hours. After that, 5 parts by weight were mixed with 100 parts by weight of n-octyl acrylate, 0.4 parts by weight of toluene diisocyanate, and 0.3 parts by weight of vinyltrimethoxysilane, and matured at 23 ° C / humidity RH65% for 7 days to form an adhesive. Composition finished product.

[Comparative Example 1]

Take 3 parts by weight of commercially available Guangrong Chemical's ILP-60T antistatic agent and 100 parts by weight of n-octyl acrylate, 0.4 parts by weight of toluene diisocyanate, and 0.3 parts by weight of vinyl trimethoxysilane, and mix at 23 ° C / RHRH65 The environment is matured for 7 days to form a finished adhesive composition.

[Comparative Example 2]

5 parts by weight of commercially available Guangrong Chemical's ILP-60T antistatic agent was mixed with 100 parts by weight of n-octyl acrylate, 0.5 parts by weight of toluene diisocyanate, and 0.3 parts by weight of vinyltrimethoxysilane, and mixed at 23 ° C / RHRH65 The environment is matured for 7 days to form a finished adhesive composition.

[Surface impedance test]

The aforementioned sample was applied to a commercially available optical film and dried at 110 ° C for 2 minutes. After that, the impedance value was measured with a high impedance meter (Mitsubishi Chemical Model MCP-HT450) in an environment with a temperature of 23 ° C and a relative humidity of 65%, and the unit is Ω / □.

[Reliability Test]

The aforementioned sample was applied to a commercially available optical film, and a commercially available surface protective film was bonded. After that, it was left in an environment at a temperature of 60 ° C. and a relative humidity of 90% for 500 hours, and then the surface protective film was peeled off, and whether a precipitate was generated on the surface of the optical film was visually observed. "○" indicates no precipitate, and "╳" indicates that precipitate was generated.

[Result discussion]

The results of the surface impedance test and reliability test are shown in Table 1. The surface impedances of Examples 1 to 3 are all 10 ¹² Ω / □ or less, which can surely provide an antistatic effect. In addition, all of Examples 1 to 3 passed the reliability test and no precipitates were generated, while Comparative Examples 1 to 2 using a commercially available antistatic agent had precipitates.

In summary, although the present invention has been disclosed as above with embodiments and examples, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (16)

An antistatic agent includes a first monomer unit shown in the following formula 1 and a second monomer unit shown in the following formula 2: Among them, R1 is independently H or C1 alkyl, R2 is independently C1 ~ C6 alkyl, R3 is independently C1 ~ C8 alkyl, R4 is independently C2 ~ C6 alkyl, and M is independently It is a group 13 to 15 element, X is independently a group 17 element or an electron-withdrawing group, and n is independently 2 to 6; wherein the first monomer unit accounts for 50% of the total mole number of the monomer unit ~ 70%, the second monomer unit accounts for 30% of the total moles of the monomer unit. The antistatic agent according to item 1 of the scope of patent application, further includes: a third monomer unit as shown in the following formula 3: Among them, R1 is independently H or C1 alkyl, and R5 is independently C1 to C8 alkyl; wherein the third monomer unit accounts for less than 20% of the total mole number of the monomer unit. The antistatic agent according to item 1 of the scope of the patent application, wherein the electron-withdrawing group is a functional group represented by the following formula 4 to formula 7: Among them, m is 1 to 5. The antistatic agent according to item 1 of the scope of patent application, wherein the anion M of the first monomer unit They are independently tetrafluoroborate, hexafluorophosphate, hexafluoroantimonate, fluorine-containing sulfonimide, perfluoroalkylsulfonyl, fluorosulfonyl, and bis (fluorosulfonyl) sulfonium Root, bis (trifluoromethanesulfonyl) fluorenimide, bissulfonylfluorenimide, hexafluoroantimonate, or tetrakis (fluorophenyl) borate. An adhesive composition includes: a main agent; a bridging agent; and an antistatic agent as described in items 1 to 4 of the scope of patent application; wherein the bridging agent is 0.1 to 1.0 relative to 100 parts by weight of the main agent. The antistatic agent is 1.0 to 5.0 parts by weight. The adhesive composition according to item 5 of the patent application scope further includes: a silane coupling agent; wherein the silane coupling agent is 0.1 to 1.0 part by weight relative to 100 parts by weight of the main agent. The adhesive composition according to item 6 of the patent application scope, wherein the main agent includes at least one (meth) acrylate; and / or wherein the bridging agent has at least two isocyanate groups (-NCO) in the molecule ) Is an isocyanate-based compound. The adhesive composition according to item 7 in the scope of the patent application, wherein the at least one (meth) acrylate is methyl (meth) acrylate, ethyl (meth) acrylate, or propyl (meth) acrylate , N-butyl (meth) acrylate, n-octyl (meth) acrylate, undecyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, Isooctyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, ethoxymethyl (meth) acrylate, benzyl (meth) acrylate, 2-phenoxy (meth) acrylate Ethyl ester, 2- (2-phenoxyethoxy) ethyl (meth) acrylate, (meth) acrylate of nonylphenol modified by ethylene oxide, and / or (meth) acrylic acid 2- (o-phenylphenoxy) ethyl ester; and / or wherein the isocyanate compound is toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylene diisocyanate Ester, hydrogenated diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, naphthalene diisocyanate, diphenylmethane diisocyanate, dimerization of any of the foregoing , Trimer, and / or an adduct formed by reacting with a polyol; and / or wherein the silane coupling agent is vinyltrimethoxysilane, vinyltriethoxysilane, vinyl ginseng (2-methyl Ethoxyethoxy) silane, 3-methacryloxypropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyl Trimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylethoxy Dimethylsilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3- Methacryloxypropyltrimethoxysilane and / or 3-mercaptopropyltrimethoxysilane. The adhesive composition described in item 5 of the patent application scope is a pressure-sensitive adhesive composition. According to the adhesive composition described in item 5 of the scope of patent application, the surface resistance value of the adhesive composition is below 10 ¹² Ω / □. A display device includes: a display panel; an optical film disposed on the display panel; and an adhesive layer disposed on the optical film. The adhesive layer is used to adhere a surface protective film for the display device to the optical film. The adhesive layer is formed by the adhesive composition as described in items 5 to 10 of the scope of patent application. An adhesive composition includes: a main agent, including: a difunctional (meth) acrylate monomer, each molecule having a binary unsaturated bond and a total number of carbon atoms less than 10; and a monofunctional (meth) acrylic acid Ester monomers; hydroxy (meth) acrylate-containing monomers; photoinitiators; and antistatic agents as described in claims 1 to 4 of the scope of patent applications; wherein the bifunctional (meth) acrylates are The total weight of the monomer, the monofunctional (meth) acrylate monomer, the hydroxyl-containing (meth) acrylate monomer, the photoinitiator, and the antistatic agent is 100 parts by weight. 30 to 75 parts by weight of the (meth) acrylate monomer, 10 to 60 parts by weight of the monofunctional (meth) acrylate monomer, and 1 to 50 of the hydroxyl (meth) acrylate monomer The photo-initiator accounts for 5-10 parts by weight, and the antistatic agent accounts for 0.5-5 parts by weight. The adhesive composition according to item 12 of the scope of patent application, wherein the difunctional (meth) acrylate monomer is ethylene glycol di (meth) acrylate, butanediol di (meth) acrylic acid Ester, resorcinol di (meth) acrylate, and / or hydroquinone di (meth) acrylate; and / or the monofunctional (meth) acrylate monomer is (meth) acrylic acid Methyl ester, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, n-octyl (meth) acrylate, undecyl (meth) acrylate, (meth) ) Isobutyl acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, ethoxymethyl (meth) acrylate , Benzyl (meth) acrylate, 2-phenoxyethyl (meth) acrylate, 2- (2-phenoxyethoxy) ethyl (meth) acrylate, modified ethylene oxide (Meth) acrylates of phenols and / or 2- (o-phenylphenoxy) ethyl (meth) acrylates; and / or the photoinitiator is 2-hydroxy-2-methyl- 1-phenylacetone, 1-hydroxycyclohexylphenylmethanone, methyl-2- (4-morpholinyl) -1- [4- (methylsulfide Phenyl) phenyl] -1-acetone, 2,4,6-trimethylbenzylidene-diphenylphosphine oxide, 2,4,6-trimethylbenzylidenephenylphosphonic acid ethyl ester, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxy Ethoxy) phenyl] -1-acetone, and / or methyl benzamate. The adhesive composition according to item 12 of the scope of the patent application, wherein the hydroxyl-containing (meth) acrylate monomer is an acrylate containing [Formula 2]: Among them, R1 is independently H or C1 alkyl, and R4 is independently C2-C6 alkyl. The adhesive composition according to item 14 of the scope of the patent application, wherein the hydroxy (meth) acrylate-containing monomer is hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxy Butyl (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, phenylepoxypropyl (methyl) ) Acrylate, and / or (meth) acrylate caprolactone adduct. A polarizing plate includes: a polarizing film; a protective film disposed on an upper surface or a lower surface of the polarizing film; an adhesive layer disposed between the polarizing film and the protective film; Formed by the adhesive composition described in ~ 15.