TW201416425A - Composition for preparing liquid crystal layer and retarder prepared by using the same - Google Patents

Abstract

The present invention relates to a composition for forming a liquid crystal layer and a retarder prepared by using same, and more specifically, to a composition forming a liquid crystal layer comprising a liquid crystal compound, an antistatic agent which can be aligned with the liquid crystal compound, a photopolymerization initiator, and an organic compound thereby inhibiting static without comprimising optical functions, and to a retarder prepared by using the composition for forming the liquid crystal layer.

Description

Liquid crystal layer forming composition and retarder manufactured using the same

The present invention relates to a liquid crystal layer forming composition and a retarder produced using the same, and more particularly to a liquid crystal layer forming composition capable of suppressing generation of static electricity, and a retarder manufactured using the same.

Various types of image display devices used at present are various optical films such as a polarizing film and a retarder. The optical film is formed by laminating a plurality of thin films.

In the case where the retarder is exemplified, the retarder is usually formed by sequentially laminating a base film, an alignment film, and a hardened liquid crystal layer. The retarder is bonded to another film such as a polarizing film to form a display panel or the like.

In order to bond a retarder to another film and use a pressure sensitive adhesive (PSA) for the upper hardened liquid crystal layer, generally, in order to prevent the bulging between the optical films under high temperature and high humidity, the adhesion is improved. Corona treatment is usually applied to the surface of the hardened liquid crystal layer and the adhesive layer.

However, when the surface of the hardened liquid crystal layer and the surface of the adhesive layer are subjected to corona treatment, the ionized charges are joined in a state of being accumulated at the interface between the hardened liquid crystal layer and the adhesive layer. Usually, the adhesive layer and the retarder are stacked in a plurality of layers in a state of being joined, and are directly packaged and supplied, and thereafter, after the product is unsealed in a state in which the plurality of layers are overlapped, for use between the optical films. When the device is joined and separated by layers in a layered manner, problems such as static electricity due to electric charges accumulated between the hardened liquid crystal layer and the adhesive layer are simultaneously generated, and a plurality of layers are simultaneously lifted, and the station time is delayed. .

Therefore, there is a need for a new solution that can ensure the antistatic property without deteriorating the optical performance required for an optical film such as a retarder.

An object of the present invention is to provide a composition which can form a liquid crystal layer having antistatic properties without lowering the function of the liquid crystal layer.

Further, it is an object of the invention to provide a retarder including the above liquid crystal layer.

A liquid crystal layer-forming composition comprising a liquid crystal compound, an antistatic agent which can be aligned with the liquid crystal compound, a polymerization initiator, and an organic solvent.

2. The composition for forming a liquid crystal layer according to item 1, wherein the antistatic agent has a sulfonate group as a two-terminal base.

3. The liquid crystal layer forming composition according to item 1, wherein the antistatic agent is represented by the following Chemical Formula 1.

Wherein R ₁ and R _{2 are} each independently hydrogen, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group or a halogen, and M ₁ and M _{2 are} independently hydrogen, an alkali metal or an alkaline earth metal.

4. The composition for forming a liquid crystal layer according to item 1 above, wherein the antistatic described above The agent is at least one selected from the group consisting of the following Chemical Formulas 2 to 6.

5. The liquid crystal layer forming composition according to the above item 1, wherein the antistatic agent is contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the liquid crystal compound based on the solid content.

A retarder in which a base film, an alignment film, and a cured liquid crystal layer formed of the composition according to any one of items 1 to 5 above are laminated.

An image display device comprising the retarder described in the above item 6.

The composition for forming a liquid crystal layer of the present invention can prevent the generation of static electricity after performing corona treatment by including an antistatic agent.

Further, since the composition for forming a liquid crystal layer of the present invention can be aligned with the liquid crystal compound because of the antistatic agent, the alignment characteristics of the liquid crystal are not lowered.

Since the retarder of the present invention includes the liquid crystal layer produced from the composition for forming a liquid crystal layer as described above, the physical properties of the retarder are maintained and the generation of static electricity is also suppressed, thereby reducing the station time in the manufacturing step, and thus Improve productivity.

The present invention relates to a composition for forming a liquid crystal layer which can suppress the generation of static electricity without lowering the optical function by using an antistatic agent, a photopolymerization initiator, and an organic solvent which can be aligned with the liquid crystal compound. Things.

Hereinafter, the present invention will be described in detail.

The liquid crystal layer forming composition of the present invention is characterized by comprising a liquid crystal compound, an antistatic agent, a photopolymerization initiator, and an organic solvent. More specifically, the antistatic agent may be aligned with the liquid crystal compound. .

The antistatic agent of the present invention can be aligned together without hindering the alignment of the liquid crystal compound, so that the optical properties inherent to the liquid crystal layer are not impaired. Such an antistatic agent preferably has a rod-type structure similar to the liquid crystalline compound used in addition to the basic antistatic property. In the present invention, the rod-type structure refers to a structure in which the length of the long axis of the molecule is shorter than the axial length, and preferably the long axis may have a length more than twice the length of the short axis, and more preferably the long axis may have a short axis. More than 3 times the length.

Further, in order to have antistatic properties, the antistatic agent of the present invention may have a functional group, and for example, each may have a sulfonate group as a terminal group.

More specific examples of the antistatic agent of the present invention can be represented by the following Chemical Formula 1.

Wherein R ₁ and R _{2 are} each independently hydrogen, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group or a halogen, and M ₁ and M _{2 are} independently hydrogen, an alkali metal or an alkaline earth metal.

More specific examples of the above Chemical Formula 1 include at least one of the compounds represented by the following Chemical Formulas 2 to 6.

The antistatic agent of the present invention can be relative to the above based on the solid content component The liquid crystalline compound contains 0.1 to 10 parts by weight in 100 parts by weight. When the content is less than 0.1 part by weight, the antistatic property cannot be sufficiently exhibited. When the content is more than 10 parts by weight, the antistatic agent is hard to be lowered due to low temperature stability, and the antistatic agent which does not contribute to hardening is easily formed, and is likely to occur under high temperature and high humidity conditions. The phase difference drops.

The liquid crystal layer-forming composition of the present invention contains a liquid crystal compound, a polymerization initiator, an organic solvent, and the like in addition to the antistatic agent, and the above-mentioned components can be selected and used in the field without any particular limitation.

The liquid crystalline compound is a liquid crystal which can undergo a polymerization reaction, and a compound well known in the art can be used without limitation. For example, Cordula Mock-Knoblauch, Olivier S. Enger, Ulrich D. Schalkowsky, "L-7 Novel Polymerisable Liquid Crys talline Acrylates for the Manufacturing of Ultrathin Optical Films", SID Symposium Digest of Technical Papers, 2006, Vol. 37 can be used. The liquid crystal compound disclosed in Japanese Patent Laid-Open Publication No. 2010-24438, which is a commercially available product, may be, for example, LC242 (manufactured by BASF Corporation), but is not limited thereto.

As the polymerization initiator, a photopolymerization initiator or a thermal polymerization initiator can be used without particular limitation, and a photopolymerization initiator can be preferably used.

As a more specific example of the photopolymerization initiator, three: Compound, acetophenone-based compound, biimidazole-based compound, anthraquinone-based compound, benzoin-based compound, benzophenone-based compound, 9-oxosulfuric acid A compound, an anthraquinone compound, etc. are not limited to these.

As the above three The compound is, for example, 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-tri , 2,4-bis(trichloromethyl)-6-(4-methoxynaphthyl)-1,3,5-three , 2,4-bis(trichloromethyl)-6-sunflower-1,3,5-three 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5-three , 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2-yl)vinyl]-1,3,5-three , 2,4-bis(trichloromethyl)-6-[2-furan-2-yl)vinyl]-1,3,5-three , 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino-2-methylphenyl)vinyl]-1,3,5-three , 2,4-bis(trichloromethyl)-6-[2-(3,4-dimethoxyphenyl)vinyl]-1,3,5-three Wait.

Examples of the acetophenone-based compound include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzoindimethyl ketal, and 2- Hydroxy-1-[4-(2-hydroxyethoxy)phenyl]-2-methylpropan-1-one, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methyl) Thienyl)-2-morpholinylpropan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholinylphenyl)butan-1-one, 2-hydroxy- Oligomer of 2-methyl-1-[4-(1-methylvinyl)phenyl]propan-1-one, 2-methyl-2-amino (4-morpholinylphenyl) B Alkan-1-one, 2-ethyl-2-amino (4-morpholinylphenyl)ethane-1-one, 2-propyl-2-amino (4-morpholinylphenyl) B Alkan-1-one, 2-butyl-2-amino (4-morpholinylphenyl)ethane-1-one, 2-methyl-2-amino (4-morpholinylphenyl)propane 1-ketone, 2-methyl-2-amino (4-morpholinylphenyl) butan-1-one, 2-ethyl-2-amino (4-morpholinylphenyl)propane - 1-ketone, 2-ethyl-2-amino (4-morpholinylphenyl)butan-1-one, 2-methyl-2-methylamino (4-morpholinylphenyl)propane 1-ketone, 2-methyl-2-dimethylamino (4-morpholinylphenyl)propan-1-one, 2-methyl-2-diethylamino (4-morpholinyl) Yl) propan-1-one.

Further, examples thereof include compounds represented by the following Chemical Formulas 7 and 8.

In the above Chemical Formula 8, R ₁ to R _{4 are} each independently a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group having 1 to 12 carbon atoms, a phenyl group substituted by an alkyl group having 1 to 12 carbon atoms, and a carbon number. A naphthyl group obtained by substituting an alkyl group of 1 to 12 or a naphthyl group substituted by an alkyl group having 1 to 12 carbon atoms.

Preferred examples of the compound represented by the above Chemical Formula 8 include the following Compounds of Chemical Formulas 9 and 10.

Examples of the biimidazole-based compound include 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, and 2,2'-bis (2, 3-dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetra Alkoxyphenyl)biimidazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetrakis(trialkoxyphenyl)biimidazole, 4,4', An imidazole compound in which a phenyl group at the 5, 5' position is substituted with a carbonyl alkoxy group. Among these, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenylbiimidazole, 2,2'-bis (2,3) can be preferably used. -Dichlorophenyl)-4,4',5,5'-tetraphenylbiimidazole.

Examples of the oxime-based compound include O-ethoxycarbonyl-α-hydroxyimino-1-phenylpropan-1-one, and compounds represented by the following Chemical Formulas 11 to 13.

Examples of the benzoin-based compound include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether.

Examples of the benzophenone-based compound include benzophenone, methyl ortho-benzoylbenzoate, 4-phenylbenzophenone, and 4-benzylidene-4'-methyl group. Phenyl sulfide, 3,3',4,4'-tetra(perbutylbutoxycarbonyl)benzophenone, 2,4,6-trimethylbenzophenone, and the like.

As the above 9-oxygen sulfur A compound, for example, 2-isopropyl 9-oxosulfur 2,4-diethyl 9-oxosulfur 2,4-dichloro 9-oxosulfur 1-chloro-4-propoxy 9-oxosulfur Wait.

Examples of the above oxime-based compound include 9,10-dimethoxyanthracene, 2-ethyl-9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, and 2-ethyl- 9,10-diethoxyanthracene, and the like.

In addition, 2,4,6-trimethylbenzimidyldiphenylphosphine oxide, 10-butyl-2-chloroacridone, 2-ethylhydrazine, 9,10- may also be mentioned. A phenanthrenequinone, camphorquinone, methyl phenylglyoxylate, a titanocene compound, and a photopolymerization initiator having a chain transfer-promoting group described in JP-A-2002-544205.

Further, the photopolymerization initiator may be used in combination with a photopolymerization initiation aid. If the light will When the polymerization initiator is used together with the photopolymerization initiation aid, the sensitivity of the composition for forming a liquid crystal layer is further increased, and productivity when the liquid crystal layer is formed by using the composition is improved.

As the photopolymerization initiation assistant, an amine compound or a carboxylic acid compound can be preferably used.

Specific examples of the amine compound in the photopolymerization initiation aid include aliphatic amine compounds such as triethanolamine, methyldiethanolamine, and triisopropanolamine; and methyl 4-dimethylaminobenzoate; Ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 2-ethylhexyl 4-dimethylaminobenzoate, 2-dimethylaminobenzoate Ethyl ester, N,N-dimethyl-p-toluidine, 4,4'-bis(dimethylamino)benzophenone (general name: Michlerone), 4,4'-bis(diethyl An aromatic amine compound such as an amino)benzophenone. As the amine compound, an aromatic amine compound can be preferably used.

Specific examples of the carboxylic acid compound include phenylthioacetic acid, methylphenylthioacetic acid, ethylphenylthioacetic acid, methylethylphenylsulfuric acid, dimethylphenylthioacetic acid, and methoxy group. Phenylthioacetic acid, dimethoxyphenylthioacetic acid, chlorophenyl sulfuric acid, dichlorophenyl sulfuric acid, N-phenylglycine, phenoxyacetic acid, naphthylthioacetic acid, N-naphthylglycine An aromatic heteroacetic acid such as aminic acid or naphthyloxyacetic acid.

The polymerization initiator is used in an amount of 0.1 to 40 parts by weight, preferably 1 to 30 parts by weight, based on 100 parts by weight of the liquid crystalline compound, based on the solid content component, and the photopolymerization starter is used in the above amount. The base is usually from 0.1 to 50 parts by weight, preferably from 1 to 20 parts by weight.

As the organic solvent of the present invention, an organic solvent generally used in the field can be used without particular limitation. For example, the following may be used alone or in combination of two or more kinds thereof: ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, and ethylene glycol monobutyl ether. Ethylene glycol monoalkyl ethers; diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol ethyl methyl ether, diethylene glycol dipropyl ether, diethylene glycol dibutyl Diethylene glycol dioxane Ethylene ethers; ethylene glycol sulphate, ethyl celecoxib acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monoethyl ether acetate, etc.; Ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, methoxybutyl acetate, methoxypentyl acetate, etc. alkyl diol alkyl ether acetate; propylene glycol monomethyl ether Propylene glycol monoalkyl ether such as propylene glycol monoethyl ether, propylene glycol monopropyl ether or propylene glycol monobutyl ether; propylene glycol dimethyl ether, propylene glycol diethyl ether, propylene glycol ethyl methyl ether, propylene glycol dipropyl ether, propylene glycol propyl methyl ether, a propylene glycol dialkyl ether such as propylene glycol ethyl propyl ether; a propylene glycol alkyl ether propionate such as propylene glycol methyl ether propionate, propylene glycol diethyl ether propionate, propylene glycol propyl ether propionate or propylene glycol butyl ether propionate; Butanediol monoalkyl ethers such as methoxybutanol, ethoxybutanol, propoxybutanol, butoxybutanol; methoxybutyl acetate, ethoxybutyl acetate, and propoxyl acetate Butanediol monoalkyl ether acetates such as butyl butyrate and butoxybutyl acetate; methoxy propionic acid Butane, monobutyl ether propionate such as ester, ethoxybutyl propionate, propoxypropionate propionate, butyrate butyrate; dipropylene glycol dimethyl ether, dipropylene glycol diethyl ether, two Dipropylene glycol dialkyl ethers such as propylene glycol methyl ethyl ether; aromatic hydrocarbons such as benzene, toluene, xylene, mesitylene; methyl ethyl ketone, acetone, methyl amyl ketone, methyl Ketones such as isobutyl ketone and cyclohexanone; alcohols such as ethanol, propanol, butanol, hexanol, cyclohexanol, ethylene glycol, and glycerin; methyl acetate, ethyl acetate, propyl acetate, and butyl acetate Ester, ethyl 2-hydroxypropionate, methyl 2-hydroxy-2-methylpropanoate, ethyl 2-hydroxy-2-methylpropionate, methyl hydroxyacetate, ethyl hydroxyacetate, butyl glycolate , methyl lactate, ethyl lactate, propyl lactate, butyl lactate, methyl 3-hydroxypropionate, ethyl 3-hydroxypropionate, propyl 3-hydroxypropionate, butyl 3-hydroxypropionate, 2 Methyl hydroxy-3-methylbutanoate, methyl methoxyacetate, ethyl methoxyacetate, propyl methoxyacetate, butyl methoxyacetate, methyl ethoxyacetate, ethoxylate Ethyl acetate, Propyl oxyacetate, butyl ethoxyacetate, methyl propoxyacetate, ethyl propoxyacetate, propyl propoxyacetate, butyl propoxyacetate, methyl butoxyacetate, butoxy Ethyl acetate, propyl butoxyacetate, butyl butoxyacetate, methyl 2-methoxypropionate, ethyl 2-methoxypropionate, propyl 2-methoxypropionate, 2 - butyl methoxypropionate, methyl 2-ethoxypropionate, ethyl 2-ethoxypropionate, 2-B Propyl oxypropionate, butyl 2-ethoxypropionate, methyl 2-butoxypropionate, ethyl 2-butoxypropionate, propyl 2-butoxypropionate, 2-butyl Butyl oxypropionate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, propyl 3-methoxypropionate, butyl 3-methoxypropionate, 3-B Methyl oxypropionate, ethyl 3-ethoxypropionate, propyl 3-ethoxypropionate, butyl 3-ethoxypropionate, methyl 3-propoxypropionate, 3-propane Ethyl oxypropionate, propyl 3-propoxypropionate, butyl 3-propoxypropionate, methyl 3-butoxypropionate, ethyl 3-butoxypropionate, 3-butyl Esters such as propyl oxypropionate and butyl 3-butoxypropionate; cyclic ethers such as tetrahydrofuran and pyran; and cyclic esters such as γ-butyrolactone.

In the present invention, in order to maintain an appropriate viscosity, an organic solvent may be contained in the remaining amount of the content of the above components based on 100% by weight of the total weight of the composition.

The composition for forming a liquid crystal layer of the present invention may further contain a polymerization inhibitor, a photosensitizer, a filler, a hardener, a leveling agent, a adhesion promoter, an antioxidant, an ultraviolet absorber, an anti-agglomerating agent, a chain transfer agent, etc., if necessary. additive.

The composition for forming a liquid crystal layer of the present invention containing the above-described components can form a hardened liquid crystal layer which can suppress the generation of static electricity without deteriorating optical function, and such a hardened liquid crystal layer can be used as an alignment provided on an optical film such as a retarder. The hardened liquid crystal layer on the film is usefully used.

As a specific example of the optical film of the present invention, the retarder has a structure in which a base film, an alignment film, and a cured liquid crystal layer are laminated in this order, and will be specifically described below.

The substrate film of the present invention can be used without any particular limitation as the substrate film generally used in the art.

In this field, as the substrate film, a transparent film is usually used, and for example, TAC (triacetyl cellulose), COP (cyclo-olefin polymer), PMMA (poly(methyl)) Methacrylate), a film of a polymethyl methacrylate) polymer or the like. The substrate film may be subjected to surface treatment such as saponification treatment, remote plasma treatment, direct plasma treatment, and monomer plasma treatment. In the case of using a PMMA-based substrate film, it is preferred to The polymer particles such as the amine ester particles are used by being dispersed in a base film.

The alignment film of the present invention may be composed of an alignment film-forming composition containing an alignment agent, a polymerization initiator, and an organic solvent which are generally used in the art. As the alignment agent, an alignment agent which is generally used in the field can be used without particular limitation. For example, a polymer having a cinnamate group and having a weight average molecular weight of about 10,000 to 500,000 can be used, but it is not limited thereto. As the polymerization initiator, a photopolymerization initiator or a thermal polymerization initiator which is generally used in the field can be used. As the photopolymerization initiator, the photopolymerization initiator exemplified above can be used. Further, the organic solvent may be appropriately selected from the above-exemplified organic solvents.

The retarder of the present invention can be usefully used in image display devices. The image display device to be applied is not limited to a specific image display device, and specifically, can be used for stereoscopic image realization or semi-transmissive liquid crystal display device, and inorganic/organic EL (Electroluminescence). A display device, a flexible display device, an LED (Light Emitting Diode), an FED (Field Emission Display), a VFD (Vacuum Fluorescent Display), a plasma display device, and the like.

Hereinafter, the present invention will be specifically described, and the examples will be described in detail. However, the embodiments of the present invention can be modified into other various forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more fully illustrate the present invention for those of ordinary skill in the art.

[Examples 1 to 4 and Comparative Examples 1 to 4]

In the liquid crystal composition, a composition for forming a liquid crystal layer was prepared according to the composition described in the following Table 1 (unit: % by weight)

[Experimental example]

The composition for forming an alignment film was applied to the TAC film, and dried at 100 ° C for 1 minute, and then exposed to each other to produce an alignment film. Coating the above Examples 1 to 4 and Comparative Example on the above alignment film The composition for forming a liquid crystal layer of 1 to 4 was dried at a temperature of 60 ° C for 1 minute, and thereafter exposed to 0.5 J to induce a curing reaction to produce a retarder.

The prepared liquid crystal layer-forming composition and the produced retarder were evaluated for the following items, and the results are shown in Table 2 below.

1. Evaluation of low temperature stability

In a low-temperature chamber, 30 ml of a transparent vial of 30 ml each was charged with 3 parts of a liquid crystal layer-forming composition containing 30% of the solid content of the above-mentioned toluene solvent, and observed at a low temperature of 5 ° C for 1 week.

○: The case where crystallization does not occur for 7 days or more under storage conditions of 5 ° C

×: crystallization occurred in less than 7 days under storage conditions at 5 ° C

2. The degree of static electricity generation

The surface resistance (Ωa) before the corona treatment on the surface of the hardened liquid crystal layer and the surface resistance (Ωb) after the corona treatment were measured using a Hiresta-UP MCP-HT450 (Mitsubishi Chemical Corporation) apparatus.

3. Liquid crystal alignment

After the liquid crystal was hardened, after testing at 80 ° C for 500 hours, the phase difference of the manufactured retarder was measured using a WPA-100L apparatus of Luceo.

◎: The phase difference is less than 125nm±4, and the liquid crystal alignment angle is less than 135°±4

○: The phase difference is less than 125 nm ± 6, and the liquid crystal alignment angle is less than 135 ° ± 6

×: The phase difference is 125 nm ± 8 or more, and the liquid crystal alignment angle is less than 135 ° ± 8

4. The phenomenon of multiple layers due to the generation of static electricity

After the optical film bonded to each other in the area of the adhesive layer and the hardened liquid crystal layer is subjected to corona treatment, the uppermost optical film is lifted from the terminal.

○: When the upper end is lifted from the terminal, the second optical film is not put on

×: When the upper end is lifted from the terminal, the second optical film is lifted

As described in the above Table 2, it was confirmed that the retarder of the example of the present invention has a smaller specific resistance after corona treatment than Comparative Examples 1 and 2 in which no antistatic agent is added.

Further, it was confirmed that Comparative Examples 3 and 4 in which an antistatic agent was added but an antistatic agent which could not be aligned with a liquid crystal compound was added, and after the corona treatment, the specific resistance was similar to that of the Example, but the liquid crystal alignment degree was poor, and it was impossible to Used as a retarder.

Claims (7)

A liquid crystal layer forming composition comprising a liquid crystal compound, an antistatic agent which can be aligned with the liquid crystal compound, a polymerization initiator, and an organic solvent. The liquid crystal layer forming composition according to claim 1, wherein the antistatic agent has a sulfonate group as a terminal group. The composition for forming a liquid crystal layer according to the first aspect of the invention, wherein the antistatic agent is represented by the following Chemical Formula 1, [wherein, R ₁ and R _{2 are} each independently hydrogen, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group or a halogen, and M ₁ and M _{2 are} each independently hydrogen, an alkali metal or an alkaline earth metal]. The composition for forming a liquid crystal layer according to Item 1, wherein the antistatic agent is at least one selected from the group consisting of Chemical Formulas 2 to 6 below. The composition for forming a liquid crystal layer according to the first aspect of the invention, wherein the antistatic agent is contained in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the liquid crystalline compound based on the solid content. A retarder in which a base film, an alignment film, and a hardened liquid crystal layer formed of the composition of any one of claims 1 to 5 are laminated in this order. An image display device comprising the retarder of claim 6 of the patent application.