JP2002214439A - Adhesive optical film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an adhesive optical film having an adhesive layer for sticking an optical film to a glass substrate of a liquid crystal panel and excellent in reworkability and durability. SOLUTION: In the adhesive optical film obtained by layering an adhesive layer for sticking an optical film to a glass substrate of a liquid crystal panel on one face of the optical film, the adhesive layer is formed from an adhesive containing an acrylic polymer having carboxyl groups and a polyfunctional metallic chelate and the adhesive layer is layered on the optical film by way of an undercoat layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive type optical film in which an adhesive layer for attaching the optical film to a glass substrate of a liquid crystal panel is laminated on one surface of the optical film. Further, the present invention relates to a liquid crystal display device using the adhesive optical film. Examples of the optical film include a polarizing film, a retardation film, an optical compensation film, a brightness enhancement film, an antiglare sheet, and a laminate of a plurality of these.

[0002]

2. Description of the Related Art In a liquid crystal display, it is indispensable to arrange polarizing elements on both sides of a glass substrate forming the outermost surface of a liquid crystal panel in view of an image forming method. Affixed to the surface. In addition to the polarizing film on the outermost surface of the liquid crystal panel,
Various optical elements have been used to improve the display quality of a display. For example, a retardation film for preventing coloration, a viewing angle widening film for improving the viewing angle of a liquid crystal display, and a brightness enhancement film for increasing the contrast of the display are used. These films are collectively called optical films.

When the optical film is attached to the outermost surface of a liquid crystal panel, an adhesive is usually used. In addition, since the optical film can be instantly fixed to the outermost surface of the liquid crystal panel and does not require a drying step for fixing the optical film, the adhesive is provided with an adhesive layer on one side of the optical film in advance. It is provided as.
That is, an adhesive optical film is generally used for attaching the optical film to the outermost surface of the liquid crystal panel.

[0004] The adhesive optical film is bonded to the outermost surface of a liquid crystal panel. At this time, if the bonding position is wrong or foreign matter gets stuck on the bonding surface, the optical film is peeled off from the outermost surface of the liquid crystal panel and reused.
However, if the optical film is peeled off too much when it is peeled off, the liquid crystal panel may be damaged such as a cell gap or glue may be left on the liquid crystal panel surface. Also,
Usually, the adhesiveness of the adhesive layer of the adhesive optical film bonded to the liquid crystal panel increases with time. Further, there is a condition that a temperature is applied in each step in a panel maker, and a liquid crystal panel on which an optical film is bonded is not always placed in a place of a constant temperature. Therefore, the adhesive optical film must be able to easily peel off the optical film and re-attach (rework) even after a long period of time, after passing through each step after bonding to the liquid crystal panel. Is required.

On the other hand, the pressure-sensitive adhesive optical film bonded to the outermost surface of the liquid crystal panel needs to have durability so as not to be peeled off even in a state of use under heating and humidification conditions.

As described above, the pressure-sensitive adhesive optical film is required to satisfy the conflicting properties of durability and performance (reworkability) such as easy peeling.

As a pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer, for example, a technique of adding a metal chelate to an acrylic polymer having a hydroxyl group is disclosed in Japanese Patent Application Laid-Open No. 63-130686. However, this pressure-sensitive adhesive does not have sufficient adhesiveness to the optical film, and the reworkability described above is insufficient. At the time of rework, a part of the pressure-sensitive adhesive remains on the liquid crystal panel surface.

[0008]

SUMMARY OF THE INVENTION The present invention relates to an adhesive type optical film provided with an adhesive layer for attaching an optical film to a glass substrate of a liquid crystal panel, which is excellent in both reworkability and durability. The purpose is to provide what you have.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and found that the above object can be achieved by the following adhesive optical film, and have completed the present invention. Was.

That is, the present invention provides an adhesive type optical film in which an adhesive layer for attaching the optical film to a glass substrate of a liquid crystal panel is laminated on one surface of the optical film, wherein the adhesive layer has a carboxyl group. The present invention relates to a pressure-sensitive adhesive optical film, which is formed of a pressure-sensitive adhesive containing an acrylic polymer and a polyfunctional metal chelate, and is laminated on the optical film via an undercoat layer.

The pressure-sensitive adhesive layer of the present invention is formed by crosslinking with an acrylic polymer having a carboxyl group and a polyfunctional metal chelate, and has a high degree of cross-linking and therefore has good durability. The reworkability is good because the adhesion of the liquid crystal is increased, and the adhesive residue on the liquid crystal panel surface can be reduced. Moreover, since the adhesive layer is formed via the anchor coat layer, the effect of reducing adhesive residue is large.

In the pressure-sensitive adhesive optical film, it is preferable that the undercoat layer is formed of an organic compound.

The organic compound is preferably one having reactivity with the carboxyl group of the acrylic polymer, which can improve the adhesion between the optical film and the adhesive layer. It is preferable in reducing the amount.

Further, the present invention provides an adhesive type optical film in which an adhesive layer for attaching the optical film to a glass substrate of a liquid crystal panel is laminated on one surface of the optical film, wherein the adhesive layer has a carboxyl group. And a pressure-sensitive adhesive optical film formed by a pressure-sensitive adhesive containing a polyfunctional metal chelate and an organic compound.

The pressure-sensitive adhesive layer of the present invention is formed by crosslinking with an acrylic polymer having a carboxyl group and a polyfunctional metal chelate, and further by crosslinking with an organic compound. In addition, since the adhesion between the optical film and the adhesive layer is thereby increased, the reworkability is good, and the adhesive residue on the liquid crystal panel surface is greatly reduced.

In the pressure-sensitive adhesive optical film of the present invention, the pressure-sensitive adhesive layer preferably has an adhesive strength to glass of 10 N / 25 mm or less.

The adhesive strength of the adhesive layer to glass is 10 N / 25.
mm or less, the reworkability is good, and the required performance can be satisfied with respect to durability. The adhesive strength of the pressure-sensitive adhesive layer to glass is more preferably 5 N / 25 mm or less from the viewpoint of reworkability. On the other hand, from the viewpoint of durability, the thickness is preferably 1 N / 25 mm or more.

The present invention also relates to a pressure-sensitive adhesive composition for an optical film, which comprises an acrylic polymer having a carboxyl group, a polyfunctional metal chelate and an organic compound. The pressure-sensitive adhesive optical film can be realized by the pressure-sensitive adhesive composition for an optical film.

Further, the present invention relates to a liquid crystal display device using the above-mentioned adhesive optical film. The pressure-sensitive adhesive optical film of the present invention is used by being bonded to a glass substrate on the outermost surface of a liquid crystal panel.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION The pressure-sensitive adhesive for forming the pressure-sensitive adhesive layer of the pressure-sensitive adhesive optical film of the present invention uses an acrylic polymer having a carboxyl group as a base polymer. The acrylic polymer having a carboxyl group is obtained by using an alkyl (meth) acrylate as a main monomer and copolymerizing the main monomer with a carboxyl group-containing monomer. In addition, a carboxyl group can be introduced into the acrylic polymer by a polymer reaction using a functional group in the acrylic polymer. In addition, (meth) acrylate means acrylate and / or methacrylate, and has the same meaning as (meth) in the present invention.

Constituting the main skeleton of the acrylic polymer,
The average number of carbon atoms in the alkyl group of the alkyl (meth) acrylate is about 1 to 12. Specific examples of the alkyl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, and butyl (meth) acrylate. , 2-ethylhexyl (meth) acrylate and the like, which can be used alone or in combination.

Examples of the monomer having a carboxyl group include acrylic acid, methacrylic acid, fumaric acid, maleic acid and itaconic acid.

In addition, acrylic polymers such as hydroxyl-containing monomers such as 2-hydroxyethyl (meth) acrylate and N-methylol (meth) acrylamide, and glycidyl (meth) acrylate such as glycidyl (meth) acrylate can be used as long as the performance of the adhesive is not impaired. Monomers having a functional group such as a monomer containing an epoxy group, and vinyl acetate, styrene and the like can also be used.

The proportion of the monomer unit (a) having a carboxyl group in the acrylic polymer is not particularly limited, but is not limited to the monomer unit (A) (excluding the monomer unit (a)) constituting the acrylic polymer. It is preferable to adjust the weight ratio (a / A) to about 0.001 to 0.12 from the viewpoint of reworkability. In particular, it is preferably 0.005 to 0.08.

The average molecular weight of the acrylic polymer is not particularly limited, but the weight average molecular weight is preferably about 300,000 to 2.5 million.

The acrylic polymer can be produced by various known methods. For example, a radical polymerization method such as a bulk polymerization method, a solution polymerization method, or a suspension polymerization method can be appropriately selected. As the radical polymerization initiator, various known azo-based and peroxide-based ones can be used.
The reaction time is about 85 ° C. and the reaction time is about 1 to 8 hours. Among the above production methods, a solution polymerization method is preferable, and a polar solvent such as ethyl acetate or toluene is generally used as a solvent for the acrylic polymer. Solution concentration is usually 20-
It is about 80% by weight.

The polyfunctional metal chelate is a polyvalent metal chelate having a covalent bond or a coordinate bond with an organic compound.
As the polyvalent metal atoms, Al, Zr, Co, Cu, F
e, Ni, V, Zn, In, Ca, Mg, Mn, Y, C
e, St, Ba, Mo, La, Sn, Ti and the like. Of these, Al, Zr, and Ti are preferred.
The atom in the organic compound that forms a covalent bond or a coordinate bond includes an oxygen atom and the like, and the organic compound includes an alkyl ester, an alcohol compound, a carboxylic acid compound, an ether compound, a ketone compound and the like. Particularly, aluminum trisacetylacetonate and the like are preferably used. These polyfunctional metal chelates are crosslinked with the acrylic polymer in the adhesive layer.

The mixing ratio of the acrylic polymer and the polyfunctional metal chelate is not particularly limited. Usually, the polyfunctional metal chelate (solid content) is 0.01 to 100 parts by weight of the acrylic polymer (solid content). It is about 6 parts by weight, preferably about 0.1 to 3 parts by weight.

Further, an organic compound can be used together in the pressure-sensitive adhesive. As the organic compound, a compound having two or more functional groups capable of reacting with a carboxyl group, such as an epoxy compound, an isocyanate compound, and an imine compound, in one molecule is used. Among these organic compounds, the effect of increasing the adhesion to the optical film can be expected by using an isocyanate-based crosslinking agent such as trimethylolpropane tolylene diisocyanate and diphenylmethane triisocyanate.

When incorporated into an acrylic polymer, the ratio of the organic compound is not particularly limited, but is usually about 5 parts by weight or less of the organic compound (solid content) per 100 parts by weight of the acrylic polymer (solid content). . Preferably 0.1
About 3 parts by weight.

The pressure-sensitive adhesive composition may further contain, if necessary, a tackifier, a plasticizer, a filler, an antioxidant, an ultraviolet absorber, and the like. Can be used as appropriate.

The material for forming the undercoat layer is preferably a material having high transparency and excellent durability. For example, the organic compound, a mixture of an acrylic polymer and an organic compound, an organic compound such as polyethyleneimine, or a resin is suitably used. Further, an inorganic layer such as an ITO vapor-deposited film can be used as a material suitable for the purpose.
Among these, it is preferable to form an undercoat layer using an organic compound, particularly a polyfunctional isocyanate compound.

In the pressure-sensitive adhesive optical film of the present invention, as shown in FIG. 1, a pressure-sensitive adhesive layer 2 made of the pressure-sensitive adhesive composition is provided on an optical film 1. Further, a release sheet 3 can be provided on the adhesive layer 2. Further, in the pressure-sensitive adhesive optical film of the present invention, as shown in FIG. 2, the pressure-sensitive adhesive layer 2 of the pressure-sensitive adhesive composition is provided on the optical film 1 via the undercoat layer 4.

As the optical film 1, a film used for forming a liquid crystal display device or the like is used, and the type thereof is not particularly limited. For example, examples of the optical film include a polarizing film, an elliptically polarizing film, a polarizing film having an optical compensation function, a polarizing film having a viewing angle expanding function, a polarizing film having a brightness improving function, and the like. In these, a retardation film, an optical compensation film, a brightness enhancement film, an antiglare sheet, and the like are laminated on a polarizing film.

As the polarizer constituting the polarizing film,
There is no particular limitation, and various types can be used. Examples of the polarizer include dichroic dyes such as iodine and dichroic dyes on a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, and an ethylene-vinyl acetate copolymer-based partially saponified film. Examples thereof include a film obtained by adsorbing a substance and stretched, and a polyene-based oriented film such as a dehydrated product of polyvinyl alcohol and a dehydrochlorinated product of polyvinyl chloride. Although the thickness of the polarizer is not particularly limited, it is generally about 5 to 80 μm.

On one or both surfaces of the polarizer, a transparent protective layer can be provided as a coating layer of a polymer or a laminate layer of a film for the purpose of water resistance or the like. As the transparent polymer or film material for forming the transparent protective layer, an appropriate transparent material can be used, but a material having excellent transparency, mechanical strength, heat stability, moisture barrier property and the like is preferably used. Although the thickness of the transparent protective layer is not particularly limited, it is generally about 10 to 300 μm.

Materials for forming the transparent protective layer include:
For example, polyester polymers such as polyethylene terephthalate and polyethylene naphthalate, cellulosic polymers such as cellulose diacetate and cellulose triacetate, acrylic polymers such as polymethyl methacrylate, and styrene such as polystyrene and acrylonitrile-styrene copolymer (AS resin) Polymers, polycarbonate polymers and the like. In addition, polyethylene, polypropylene, polyolefin having a cyclo- or norbornene structure, polyolefin polymers such as ethylene-propylene copolymer, vinyl chloride polymers, amide polymers such as nylon and aromatic polyamide, imide polymers, and sulfone polymers , Polyether sulfone polymer, polyether ether ketone polymer, polyphenylene sulfide polymer, vinyl alcohol polymer, vinylidene chloride polymer, vinyl butyral polymer, arylate polymer, polyoxymethylene polymer, epoxy polymer, or the above Blends of polymers and the like are also examples of the polymer forming the transparent protective layer.

Examples of the retardation film include a birefringent film and a liquid crystal polymer film obtained by uniaxially or biaxially stretching a polymer material. Although the thickness of the retardation film is not particularly limited, it is generally about 20 to 150 μm. The retardation plate can be formed as a superimposed body of two or more stretched films to control the optical properties such as retardation, etc. It can also be used as an elliptically polarizing film laminated with a polarizing film to compensate for a phase difference or the like.

Examples of the polymer material include polyvinyl alcohol, polyvinyl butyral, polymethyl vinyl ether, polyhydroxyethyl acrylate, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, polycarbonate, polyarylate, polysulfone, polyethylene terephthalate, polyethylene naphthalate, and polyethylene naphthalate. Ether sulfone, polyphenylene sulfide, polyphenylene oxide,
Examples include polyallyl sulfone, polyvinyl alcohol, polyamide, polyimide, polyolefin, polyvinyl chloride, cellulose polymers, and various binary and ternary copolymers, graft copolymers, and blends thereof. These polymer materials become oriented products (stretched films) by stretching or the like.

Examples of the liquid crystalline polymer include various types of main chain type and side chain type in which a conjugated linear atomic group (mesogen) for imparting liquid crystal orientation is introduced into the main chain or side chain of the polymer. And so on. Specific examples of the main chain type liquid crystalline polymer include a structure in which a mesogen group is bonded by a spacer portion that imparts flexibility, such as a nematic-oriented polyester-based liquid crystalline polymer, a discotic polymer, and a cholesteric polymer. . Specific examples of the side chain type liquid crystal polymer include polysiloxane, polyacrylate, polymethacrylate, or polymalonate as a main chain skeleton, and a paraffin having a nematic alignment imparting property via a spacer portion including a conjugated atomic group as a side chain. And those having a mesogen moiety composed of a substituted cyclic compound unit. These liquid crystalline polymers are prepared by, for example, rubbing the surface of a thin film of polyimide or polyvinyl alcohol formed on a glass plate, or applying a liquid crystalline polymer solution on an alignment-treated surface such as obliquely deposited silicon oxide. It is performed by developing and heat-treating.

The polarizing film and the retardation film can be laminated and used, and can be a reflection type polarizing film, a semi-transmissive layer type polarizing film, a polarized light separating polarizing film and the like. In addition, the above-described optical films can be used as optical compensation films and other various viewing angle widening films. Further, examples of the optical films include a brightness enhancement film and the like. Further, the polarizing film may be provided with a reflection layer having a fine uneven structure on the surface to form an antiglare sheet.

The formation of the adhesive layer 2 is performed on one side of the optical film 1 to be adhered to a glass substrate of a liquid crystal panel. The forming method is not particularly limited, and examples thereof include a method of applying a pressure-sensitive adhesive composition (solution) to the optical film 1 and drying the same, and a method of transferring the pressure-sensitive adhesive composition using a release sheet 3 provided with a pressure-sensitive adhesive layer 2. The thickness of the adhesive layer 2 (dry film thickness) is not particularly limited.
It is preferably about 40 μm.

When the undercoat layer 4 is provided, the optical film 1 to be adhered to the glass substrate of the liquid crystal panel is used.
After forming the undercoat layer 4 on one side of the above, the adhesive layer 2 is provided. The formation of the undercoat layer 4 can employ the same method as the formation of the adhesive layer 2. Undercoat layer 4
Although the thickness of (dry film thickness) is not particularly limited, it is 0.01.
It is preferably about 1.0 μm.

Examples of the constituent material of the release sheet 3 include paper, synthetic resin films such as polyethylene, polypropylene, and polyethylene terephthalate. On the surface of the release sheet 3, in order to enhance the releasability from the pressure-sensitive adhesive layer 2,
If necessary, a release treatment such as a silicone treatment, a long-chain alkyl treatment, or a fluorine treatment may be performed.

[0045]

EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. In addition, in each example, parts and% are based on weight.

Reference Example 1 (Preparation of pressure-sensitive adhesive composition) 100 parts of butyl acrylate
One part of acrylic acid and 0.2 part of azobisisobutyronitrile were reacted in an ethyl acetate solvent at 60 ° C. for 7 hours while stirring to obtain an acrylic polymer solution. Aluminum trisacetylacetonate, which is a polyfunctional metal chelate, is added to the acrylic polymer solution with a polymer solid content of 10%.
One part was added to 0 part to prepare an adhesive composition (solution).

(Preparation of pressure-sensitive adhesive optical film) The pressure-sensitive adhesive composition (solution) prepared as described above has a thickness of 2 after drying.
An adhesive layer formed on a polyethylene terephthalate-based separator so as to have a thickness of 5 μm and then dried to a thickness of 1 μm.
It was transferred to a polarizing film of 80 μm (a polyvinyl alcohol film impregnated with iodine and stretched, and then a triacetyl cellulose film was bonded to both sides via an adhesive) to prepare an adhesive polarizing film.

REFERENCE EXAMPLE 2 In Reference Example 1 (preparation of the pressure-sensitive adhesive composition), the components of the acrylic polymer were 50 parts of butyl acrylate, 50 parts of isononyl acrylate, 1 part of acrylic acid and azobisisobutyronitrile 0.1 part. Except for the two-part change,
A pressure-sensitive adhesive composition (solution) was prepared in the same manner as in Reference Example 1. Further, in the same manner as in Reference Example 1, an adhesive polarizing film was produced.

Example 1 Instead of adding 1 part of aluminum trisacetylacetonate to 100 parts of the acrylic polymer in Reference Example 1 (preparation of the pressure-sensitive adhesive composition), 0.1 parts of aluminum trisacetylacetonate was added. 5 parts and trimethylolpropane tolylene diisocyanate as an organic compound.
An adhesive composition (solution) was prepared in the same manner as in Reference Example 1 except that 5 parts was added. Further, in the same manner as in Reference Example 1, an adhesive polarizing film was produced.

Example 2 In Reference Example 1 (preparation of an adhesive type optical film), before transferring the adhesive layer to the polarizing film, toluene of trimethylolpropane tolylene diisocyanate was previously coated on the surface of the polarizing film on which the adhesive layer was to be provided. Apply 1% solution to 0.1
Reference Example 1 except that an undercoat layer of μm was formed.
In the same manner as in the above, an adhesive polarizing film was produced.

Comparative Example 1 In Reference Example 1 (preparation of the adhesive composition), 1 part of trimethylolpropane tolylene diisocyanate was added instead of 1 part of aluminum trisacetylacetonate to 100 parts of the acrylic polymer. Except for this, an adhesive composition (solution) was prepared in the same manner as in Reference Example 1. Further, in the same manner as in Reference Example 1, an adhesive polarizing film was produced.

Comparative Example 2 In Reference Example 1 (preparation of the pressure-sensitive adhesive composition), the components of the acrylic polymer were changed to 100 parts of butyl acrylate,
1 part of hydroxyethyl acrylate and azobisisobutyronitrile An adhesive composition (solution) was prepared in the same manner as in Reference Example 1 except that the composition was changed to 2 parts. Further, in the same manner as in Reference Example 1, an adhesive polarizing film was produced.

The following evaluation was performed on the pressure-sensitive adhesive polarizing films obtained in the above Examples and Comparative Examples. Table 1 shows the evaluation results.

(Heat Durability) A sample (adhesive polarizing film) was cut to a size of 12 inches, attached to a glass plate, and autoclaved (50 ° C. × 0.5 MPa × 15).
Min). Thereafter, it was put in an atmosphere of 90 ° C. (dry) for 500 hours, and occurrence of trouble was confirmed based on the following criteria.

(Humidification Durability) A sample was cut into a size of 12 inches, attached to a glass plate, and subjected to an autoclave treatment (50 ° C. × 0.5 MPa × 15 minutes). After that, it was put in an atmosphere of 60 ° C. and 90% RH for 500 hours, and occurrence of trouble was confirmed based on the following criteria.

○: No problem occurred. X: Defects such as foaming and peeling are observed.

(Adhesive Strength to Glass) A sample was cut into a width of 25 mm, attached to a non-alkali glass plate (manufactured by Corning: Corning 1737), and subjected to an autoclave treatment (50 ° C. × 0.5 MPa × 15 minutes). afterwards,
At a peeling angle of 90 ° and a room temperature atmosphere (25 ° C) at a peeling speed of 300 m / min using a tensile tester, the peeling aging force was measured to obtain an adhesive force (N / 25 mm).

(Glue residue) The sample was cut into a 12-inch size, affixed to a glass plate, and autoclaved (5
(0 ° C. × 0.5 MPa × 15 minutes). Then 60
After being put in an atmosphere of ° C (dry) for 24 hours, the operator peeled off the sample. At this time, the remaining state of the adhesive (adhesive) on the glass surface was confirmed according to the following criteria.

◎: No adhesive residue is observed at all. O: Peeling is observed at the beginning of peeling and / or at the end of peeling. Δ: A level at which peeling is started and / or some adhesive residue is observed in addition to the end of peeling, but there is no practical problem. ×: Adhesive residue occurs at a practically problematic level.

[0060]

[Table 1] As shown in Table 1, the present invention (Example) has good durability,
Also, the reworkability is good when the adhesive strength to glass is 10 N / 25 mm or less. Moreover, it is recognized that there is no adhesive residue and the reworkability is extremely good.

[Brief description of the drawings]

FIG. 1 is a sectional view of an adhesive optical film of the present invention.

FIG. 2 is a cross-sectional view of the pressure-sensitive adhesive optical film of the present invention provided with an undercoat layer.

[Explanation of symbols]

 Reference Signs List 1 optical film 2 adhesive layer 3 release sheet 4 undercoat layer

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Naru Takahashi 1-1-2 Shimohozumi, Ibaraki-shi, Osaka Nitto Denko Corporation (72) Akiko Ogasawara 1-1-1-2 Shimohozumi, Ibaraki-shi, Osaka F-term in Nitto Denko Corporation (Reference) 2H049 BA02 BA06 BA27 BB23 BB33 BB43 BB51 BB54 BC22 2H091 FA08X FA08Z FA11X FA11Z FA37X GA17 LA02 LA04 LA06 4J004 AA10 AA17 AB01 AB05 CA03 CA04 CB03 CC05 DA03 CD05 DA06 DF041 DF051 EC231 GA05 GA07 GA11 GA22 HD43 JA09 JB09 KA16 LA01 LA06 LA07 MA05 MB05 NA17 NA19 PA05 PA11 PA13 PA42

Claims (6)

[Claims] 1. An adhesive type optical film in which an adhesive layer for attaching the optical film to a glass substrate of a liquid crystal panel is laminated on one surface of the optical film, wherein the adhesive layer has a carboxyl group-containing acrylic resin. An adhesive type optical film which is formed of an adhesive containing a polymer and a polyfunctional metal chelate, and which is laminated on an optical film via an undercoat layer. 2. The pressure-sensitive adhesive optical film according to claim 1, wherein the undercoat layer is formed of an organic compound. 3. An adhesive type optical film in which an adhesive layer for adhering the optical film to a glass substrate of a liquid crystal panel is laminated on one surface of the optical film, wherein the adhesive layer has a carboxyl group-containing acrylic resin. An adhesive optical film formed of an adhesive containing a polymer, a polyfunctional metal chelate and an organic compound. 4. The adhesive layer has an adhesive strength to glass of 10 N / 2.
The pressure-sensitive adhesive optical film according to claim 1, wherein the thickness is 5 mm or less. 5. A pressure-sensitive adhesive composition for an optical film, comprising an acrylic polymer having a carboxyl group, a polyfunctional metal chelate and an organic compound. 6. A liquid crystal display device using the pressure-sensitive adhesive optical film according to claim 1.