KR20110108327A - Film for optical filter and optical filter comprising same for plasma display panel - Google Patents

Abstract

The present invention relates to the development of an optical filter for light filter having excellent light resistance by an adhesive containing a crosslinking acrylic resin, a crosslinking agent and a neon light absorbing dye, and an optical filter for plasma display panel using the same.
70.1-99.9 weight% of C4-C12 (meth) acrylic-acid alkylester of an alkyl group, 0.1-10 weight% of the hydroxyl group containing monomer copolymerizable with the said (meth) acrylic-acid alkylester, and the said (meth) acrylic-acid alkylester and a hydroxyl group By using the adhesive which consists of a crosslinking type acrylic resin and a crosslinking agent which copolymerized the other monomer copolymerizable to the containing monomer in the ratio of the quantity of 0.1-19.9 weight%, the neon light absorbing pigment shows the outstanding stability in an adhesive layer, and the adhesive By providing the layer on one side of the transparent substrate, it is possible to develop an optical filter film having excellent light resistance and an optical filter for plasma display panel using the same.

Description

Film for optical filter and optical filter for plasma display panel using the same {FILM FOR OPTICAL FILTER AND OPTICAL FILTER COMPRISING SAME FOR PLASMA DISPLAY PANEL}

The present invention relates to an optical filter film having excellent durability in which a neon light absorbing dye is contained in an adhesive layer, and an optical filter for plasma display panel (hereinafter referred to as PDP) using the same.

The principle of PDP is to apply a voltage to a rare gas (neon, xenon, etc.) enclosed in a cell sandwiched between two sheets of glass, and to emit light on the wall of the cell in which ultraviolet rays generated by the rare gas in the plasma state are generated. When it hits, it generates the visible light necessary for the image, but at the same time the visible light near the wavelength 595nm to reduce the color purity of red light due to near infrared rays, electromagnetic waves and neon gas harmful to the human body (hereinafter referred to as neon light) Since harmful electromagnetic waves are also emitted, it is possible to transmit beneficial visible light, but it is necessary to shield near-infrared rays including neon light and harmful electromagnetic waves to the human body, thereby requiring an optical filter. (See Patent Document 1)

As a member used for an optical filter, near-infrared rays and electromagnetic waves harmful to a human body can be cut | disconnected simultaneously by using the multilayer sputtered film by a metal material. (See Patent Documents 2 and 3)

However, it is necessary to provide a separate shielding layer for neon light. Conventionally, a neon light absorbing film coated with a transparent resin by adding a specific dye absorbing neon light to a binder resin, and a near infrared ray and electromagnetic wave shielding function The optical filter which bonded together the base material, anti-glare, antireflection film, etc. which it has with an adhesive is used. As said pigment | dye, the cyanine pigment | dye which has sufficient water absorption characteristic by addition of a small quantity is mainly used.

If the neon light absorbing dye can be contained in the pressure-sensitive adhesive layer, since the neon light absorbing ability can be imparted to any of the layers constituting the optical filter, the efficiency of optical filter production can be expected to be remarkably improved. However, when the neon light absorbing dye represented by the cyanine dye is added to the pressure-sensitive adhesive, unlike the addition to the binder resin for application composed of a polymer body such as a polyester resin or an acrylic resin, the deterioration of the pigment after the endurance test is large and neon light. There exists a problem peculiar to an adhesive which loses an absorption function, and until now, the examination using various additives in order to stabilize the unstable neon light absorbing pigment in an adhesive has been performed. (See Patent Document 4)

In recent years, the tetraaza porphyrin pigment is used instead of the cyanine pigment as a neon light absorbing dye. (See Patent Document 5)

The tetraazaporphyrin pigment is stable in the pressure-sensitive adhesive even without an additive, and is more durable than the cyanine pigment.

As an adhesive, the adhesive which consists of crosslinking type acrylic resin and a crosslinking agent with high versatility is considered. However, depending on the monomer composition of the resin, sufficient durability, in particular, sufficient light resistance may not be obtained.

Patent Document 1: Japanese Patent Application Laid-Open No. 2000-98131 Patent Document 2: Patent No.3753482 Patent Document 3: Japanese Patent Application Laid-Open No. 10-282335 Patent Document 4: Japanese Patent Application Laid-Open No. 2007-233323 Patent Document 5: Patent Publication No. 3834479

As an adhesive consisting of a crosslinking acrylic resin and a crosslinking agent, an optical filter film having excellent light resistance and an optical filter for plasma display panel using the same, wherein the pressure-sensitive adhesive layer made of the pressure-sensitive adhesive containing a neon light absorbing dye is provided on one side of the transparent substrate. Developing is a subject of the present invention.

MEANS TO SOLVE THE PROBLEM As a result of earnestly researching in order to solve the said subject, the adhesive layer which consists of this adhesive containing a neon light absorbing pigment is used by using the adhesive which consists of a crosslinking type acrylic resin and a crosslinking agent which consist of a specific monomer composition. An optical film provided on one side of the film and an optical filter for plasma display panel using the same have been found to be able to maintain excellent stability in the light resistance test, and have completed the present invention.

That is, the present invention

(1) 70.1-99.9 weight% of (meth) acrylic-acid alkylesters of 4-12 carbon atoms of (a) alkyl group, (b) 0.1-10 weight% of hydroxyl-containing monomer copolymerizable with said (a) component, and / or (c) Crosslinking type which copolymerized the said (a) component and the other monomer copolymerizable with (b) component in the ratio of the quantity of 0.1-19.9 weight% ((a) + (b) + (C) is 100 weight%). An adhesive comprising an acrylic resin and a crosslinking agent, comprising a pressure-sensitive adhesive layer formed on one surface of a transparent substrate, wherein the pressure-sensitive adhesive layer contains a neon light absorbing dye,

(2) The crosslinking agent is block type isocyanate, The film for optical filters as described in said (1),

(3) The film for optical filters as described in said (1) or (2) whose neon light absorption pigment | dye is a tetraaza porphyrin pigment | dye,

(4) The film for optical filters as described in any one of said (1)-(3) characterized by the adhesive containing the tackifier which consists of terpene phenol resins,

(5) At least one layer selected from a hard coat layer, a conductive layer, an antiglare layer, and an antireflection layer is laminated on the opposite side of the surface having the pressure-sensitive adhesive layer of the transparent base material provided with the pressure-sensitive adhesive layer. The film for optical filters in any one of said (1)-(4),

(6) The optical filter for plasma display panel which laminated | stacked the film for optical filters in any one of (1)-(5) in the film or glass which has near-infrared and / or electromagnetic wave shielding function,

Is related.

The pressure-sensitive adhesive used in the present invention exhibits excellent stability even if it contains a neon light absorbing dye typified by a tetraazaporphyrin dye, and an optical filter film having the pressure-sensitive adhesive layer provided on one side of a transparent substrate and a plasma display panel using the same The optical filter for shows excellent light resistance.

The adhesive used by this invention is 0.1-10 weight% of the hydroxyl-containing monomer copolymerizable with 70.1-99.9 weight% of the (meth) acrylic-acid alkylester of 4-12 carbon atoms of an alkyl group, and the said (meth) acrylic-acid alkylester, and the said It is an adhesive which consists of a crosslinking type acrylic resin and a crosslinking agent which copolymerized the (meth) acrylic-acid alkylester and the other monomer copolymerizable with a hydroxyl-containing monomer in the quantity of 0.1-19.9 weight%.

Although the (meth) acrylic-acid alkylester used for this invention will not be specifically limited if it is a (meth) acrylic-acid alkylester whose carbon number of an alkyl group is 4-12, For example, (meth) butyl acrylate, isobutyl (meth) acrylate, ( S-butyl methacrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isopentyl (meth) acrylate, neopentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate, (meth) acrylate 2-ethylhexyl acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isonyl (meth) acrylate, decyl (meth) acrylate, isdecyl (meth) acrylate, (meth) acrylic acid Although undecyl or (meth) acrylic-acid dodecyl etc. are mentioned, these may use two or more types together as needed. Among these, butyl acrylate can be used suitably.

As a hydroxyl-containing monomer copolymerizable with the said (meth) acrylic-acid alkylester, what functions as a crosslinking point with a crosslinking agent mentioned later, etc. are used, Although there is no restriction | limiting in particular about the kind, (meth) acrylic-acid hydroxyethyl, (meth) Acrylic acid hydroxypropyl etc. are mentioned, These may use two or more types together as needed. Among these, 2-hydroxyethyl acrylate can be used suitably.

Although it does not specifically limit as another monomer copolymerizable with a (meth) acrylic-acid alkylester and a hydroxyl-containing monomer, Non-aromatic rings, such as (meth) acrylic-acid alkylester whose carbon number of an alkyl group is 1-3, and isobornyl (meth) acrylic acid (N-substituted) amide monomers such as aromatic ring-containing (meth) acrylic acid esters such as containing (meth) acrylic acid esters and (meth) acrylic acid arylalkyl esters, and N, N-dimethyl (meth) acrylamides, and (meth) Epoxy-group containing acrylic monomers, such as glycidyl acrylate, etc. are mentioned, These may use two or more types together as needed. Among these, methyl acrylate can be used suitably.

The monomer is usually dissolved or dispersed in an organic solvent such as toluene, xylene, benzene, hexane, heptane, ethyl acetate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetone, or alcohols, and stirred. And copolymerization by adding a polymerization initiator to obtain a crosslinking acrylic resin. Although the polymerization initiator used here may be either an inorganic type or an organic type polymerization initiator, For example, it is preferable to use organic polymerization initiators, such as azobisisobutyronitrile (henceforth AIBN) and benzyl peroxide. The usage-amount of a polymerization initiator may be a normal usage-amount, for example, it can select from the range of about 0.01-1 weight part with respect to 100 weight part of all monomer components.

Examples of the crosslinking agent used in the crosslinking acrylic resin include polyisocyanate compounds, melamine compounds, diamine compounds, epoxy resin compounds, urea resin compounds, metal salts such as aluminum chloride, ferric chloride or aluminum sulfate, and the like. Compounds are preferred, and block polyisocyanates are more preferred. Examples of the block polyisocyanate include oxime block type isocyanates and active methylene block isocyanates, and low temperature curing type active methylene block isocyanates that do not require a catalyst such as a tin compound can be suitably used.

The pressure-sensitive adhesive using the cross-linked acrylic resin and the cross-linking agent is excellent in adhesive strength and cohesion, and there is no unsaturated bond in the polymer, so that it has high stability against light and oxygen, and also because of the high degree of freedom of choice of the type and molecular weight of the monomer. It is preferable that the weight average molecular weight is 1 million or more in order to make the polymer which has sufficient crosslinking density even immediately after application drying for stability of the neon light absorbing pigment before and after an aging operation.

Examples of the tackifier used in the present invention include terpene-based tackifying resins, phenol-based tackifying resins, rosin-based tackifying resins, epoxy-based tackifying resins, polyamide-based tackifying resins, ketone-based tackifying resins, and elastomeric adhesives. The imparting resin etc. can be mentioned, The terpene phenol resin which is modified terpene-type resin can be used suitably.

The neon light absorbing dye used in the present invention has an absorption maximum at 600 nm at a wavelength of 580, and the half width thereof is preferably about 10 nm to 60 nm. For example, cyanine, squaria, chianthene, oxo The tetraaza porphyrin pigment | dye chosen from pigments, such as knol, azo, and tetraaza porphyrin, and is represented by Formula (1) can be used suitably. The tetraaza porphyrin pigment | dye is also marketed, For example, "PD319" (made by Mitsui Chemical Co., Ltd.) and "TAP2" (made by Yamada Chemical Co., Ltd.) is mentioned (absorption wavelength peak is 592 nm).

(In formula, R <_1> -R <_8> represents an alkyl group etc., M represents two hydrogen atoms or a bivalent metal, a trivalent, or tetravalent metal derivative.)

What is necessary is just to set suitably the compounding quantity of a pigment | dye, and it is suitable to mix | blend so that the transmittance | permeability may be 5 to 70% in the maximum value of absorption.

In order to manufacture the film of this invention, for example, 100 weight part of said crosslinkable acrylic resins, 0.01-1 weight part of crosslinking agents, 0.01-1 weight part of neon light absorbing pigments, 0.1-10 weight part of other additives, such as an ultraviolet absorber, The adhesive obtained by dispersing in the inside may be coated on a transparent substrate and dried. Examples of the solvent include alcohols such as methanol, ethanol, isopropanol, diacetone alcohol, ethyl cellosolve and methyl cellosolve, ketones such as acetone, methyl ethyl ketone, cyclopentanone and cyclohexanone, and N and N. Amides such as dimethylformamide, N, N-dimethylacetamide, sulfoxides such as dimethyl sulfoxide, ethers such as tetrahydrofuran, dioxane and ethylene glycol monomethyl ether, methyl acetate, ethyl acetate, acetic acid Esters such as butyl, halogen-based solvents such as chloroform, methylene chloride, dichloroethylene and trichloroethylene, aromatics such as benzene, toluene, xylene, monochlorobenzene, dichlorobenzene, and n-hexane, n-heptane Fluorine-based solvents such as aliphatic hydrocarbons, tetrafluoropropyl alcohol, pentafluoropropyl alcohol, and the like can be used, and the solubility of each composition is good and there is no problem such as coating or drying. It said, it is necessary to select a solvent enough care about safety.

Coating of an adhesive is well-known coating methods, such as the flow coat method, the spray method, the bar coat method, the gravure coating method, the roll coating method, the blade coating method, the air knife coating method, the lip coating method, and the die coat, in a finishing state. The treatment layer is fixed by coating so that the film thickness of is usually 5 to 50 µm, preferably 15 to 30 µm and drying at 80 to 140 ° C, preferably 100 to 130 ° C. Usually, an aging process is performed after this. The conditions of the aging treatment vary depending on the type of the resin and the crosslinking agent to be used, but the present adhesive is preferably stored for about 1 day to 1 week in a 25-50 ° C. thermostatic bath.

Although the kind and thickness are not specifically limited if the transparent base material used for this invention is high transparency, there is no gas, etc., and it can be used as an optical film, the thickness of 10-500 micrometers can be said to be a range with favorable workability and a preferable range. have. Specifically, polymer resin films such as polyester (hereinafter referred to as PET), polycarbonate, triacetate, norbornene, acryl, cellulose, polyolefin or urethane, may be mentioned. In order to absorb and stabilize the function of the inner member, a transparent support film containing an ultraviolet absorbent material may be used. Moreover, in order to improve adhesiveness with a coating film, you may coat the surface of a film with corona discharge treatment, a plasma treatment, a glow discharge treatment, a roughening process, a chemical treatment, an anchor coat agent, a primer, etc. It is further preferable that the transparent substrate is a film having a single or a plurality of functions such as antireflection, antiglare, antireflection, antistatic, antifouling, near infrared absorptivity, electromagnetic shielding or color tone adjustment, for example. In particular, in the case where the neon light absorbing adhesive layer is provided thereon, the optical filter film and the optical filter for plasma display panel using the same can be retained because they can simultaneously hold such a function and neon light absorbing ability. You can get it.

Next, although the example of the transparent support film which maintains the above-mentioned functionality is demonstrated below, it is not limited to these.

An anti-reflective film coats a low refractive index agent with binder resin and other additives on the surface of transparent support films, such as PET, and between the film or the transparent support film which suppressed the reflection of light from the outside, and the low refractive index layer A hard coat layer and a high refractive index layer were applied to the film to improve visibility by controlling to remove the reflected light by each layer. The anti-glare and anti-reflective film is a fine particle in the high refractive index layer or other layers of the anti-reflective film. Is a film that reflects light from the outside and makes it more visible.The arc top series (product made by Asahi Glass Co., Ltd.) and the Kaya coat ARS series (product made by Nippon Kayaku Co., Ltd.) Although the anti-tacky anti-reflective film can be used as a transparent support film as Kaya coat AGRS series (made by Nippon Kayaku Co., Ltd.) and ria look (made by Japan Oil Co., Ltd.), these It is possible to obtain from the market.

As a method of shielding electromagnetic waves, a metal type in which a fine wire of a metal such as copper is maintained on a transparent substrate with a geometric shape such as a mesh, and a metal in a range having light transmittance There is a thin film type in which an ultrathin film is held on a transparent substrate or glass. Since the thin film type generally does not reflect and transmit near infrared rays, it does not need a near infrared absorbing layer separately. As the transparent base material having other functionalities used in the present invention, there are films in which functions such as ultraviolet absorbency, antistatic property, antifouling property, color tone adjustment, etc. are maintained alone or in plurality, but these are binders containing a compound having such performance. It can prepare according to the method known per se by the method etc. shape | molding from a resin composition.

Next, the optical filter of this invention makes the neon light absorption film of this invention in which this adhesion layer is provided on the transparent base material as a minimum component, The transparent base material or glass which has the neon light absorption film and other functions ( For example, the film or glass which has a near-infrared and / or electromagnetic wave shielding function) can be laminated | stacked and obtained. The optical filter of this invention may be previously bonded to a glass plate or a plastic plate, and may be provided in the front surface of a plasma display, or may be directly bonded together and used.

Example

The present invention will be described in more detail with reference to the following Examples, but the present invention is not limited to these Examples. In addition, in an Example, a part means a weight part and% means weight%, respectively.

The weight average molecular weight of the used adhesive was measured on condition of the following of GPC (gel permeation chromatography) method.

Analysis equipment: Showa Electric Works, GPC SYSTEM-21 Shodex

Column: Showa Major, KF-803L + KF-803L + KF-803L

Column temperature: 40 ℃

Flow rate: 1 ml / min

Eluent: Tetrahydrofuran

Detector: parallax refractometer

Standard sample: Polystyrene

Example 1

<Production of Acrylic Resin>

90 parts of butyl acrylate, 9.5 parts of methyl acrylate, 0.5 part of 2-hydroxyethyl acrylate, and 150 parts of ethyl acetate were put into the polymerization container, and nitrogen substitution was performed at room temperature for 1 hour. Then, it heated up at 75 degreeC under stirring, added 0.02 part of AIBN as a polymerization initiator, superposed | polymerized at 75 degreeC for 6 hours, and produced the acrylic ester polymer. The weight average molecular weight of this acrylic acid ester polymer was 1 million.

<Production of Neon Light Absorption Film>

The coating liquid which mixed and melt | dissolved each material shown in the following table using the produced acrylic ester type polymer (acrylic-type resin) so that it may become uniform is comma-made on MRF-38 (brand name, peeling PET film, Mitsubishi Chemical polyester film) The coating layer was coated with a coating speed of 0.8 m / min and a drying temperature of 110 deg. C so that the thickness of the pressure-sensitive adhesive layer became 18 µm with a coater to form an pressure-sensitive adhesive layer. Next, a neon light absorbing film having anti-reflective properties by bonding two films so that the pressure-sensitive adhesive layer is formed on the opposite side of the anti-reflective surface of KAYACOAT ARS-E105-100UV (trade name, anti-reflective film, Japanese powder). Got.

<Production of optical filter for PDP>

The said neon light absorption film was bonded together on the film which has a metal multilayer sputtered film which has an adhesive layer, and the optical filter for PDP was obtained. This filter may be applied directly to the front surface of the PDP module, or may be attached to a transparent plate such as a glass plate and installed in front of the module, thereby sufficiently exhibiting the necessary performance as a PDP filter.

Material usage

14.0 parts of acrylic resin

0.07 part of crosslinking agent (brand name K6000; product of Asahi Kasei Chemicals Co., Ltd.)

0.25 parts of additives (brand name K140; Yasuhara Chemical Co., Ltd. product)

0.2 part of ultraviolet absorbers (brand name Chinubin 109; Shiba GIGI Co., Ltd. product)

0.005 parts of neon light absorption dyes (brand name PD319; product of Mitsui Chemicals)

Methyl ethyl ketone 14.5 parts

Example 2

<Production of Acrylic Resin>

70 parts of 2-ethylhexyl acrylate, 29.5 parts of methyl acrylate, 0.5 part of 2-hydroxyethyl acrylate, and 150 parts of ethyl acetate were put into the polymerization container, and nitrogen substitution was performed at room temperature for 1 hour. Then, it heated up at 75 degreeC under stirring, added 0.02 part of AIBN as a polymerization initiator, superposed | polymerized at 75 degreeC for 6 hours, and produced the acrylic ester polymer. The weight average molecular weight of this acrylic acid ester polymer was 1,500,000.

<Production of Neon Light Absorption Film>

A neon light absorbing film having anti-reflective properties was obtained in the same manner as in Example 1 except that the acrylic resin of Example 1 was changed.

<Production of optical filter for PDP>

The said neon light absorption film was bonded together on the metal multilayer sputtered film which has an adhesive layer, and the optical filter for PDP was obtained. This filter may be applied directly to the front surface of the PDP module, or may be attached to a transparent plate such as a glass plate and installed in front of the module, thereby sufficiently exhibiting the necessary performance as a PDP filter.

Example 3

<Production of Acrylic Resin>

90 parts of butyl acrylate, 2 parts of methyl acrylate, 0.5 part of 2-hydroxyethyl acrylate, 7.5 parts of glycidyl methyl acrylate, and 150 parts of ethyl acetate were put into the polymerization container, and nitrogen substitution was performed at room temperature for 1 hour. Then, it heated up at 75 degreeC under stirring, added 0.02 part of AIBN as a polymerization initiator, superposed | polymerized at 75 degreeC for 6 hours, and produced the acrylic ester polymer. The weight average molecular weight of this acrylate ester polymer was 104,000,000.

<Production of Neon Light Absorption Film>

A neon light absorbing film having anti-reflective properties was obtained in the same manner as in Example 1 except that the acrylic resin of Example 1 was changed.

<Production of optical filter for PDP>

The said neon light absorption film was bonded together on the metal multilayer sputtered film which has an adhesive layer, and the optical filter for PDP was obtained. This filter may be applied directly to the front surface of the PDP module, or may be attached to a transparent plate such as a glass plate and installed in front of the module, thereby sufficiently exhibiting the necessary performance as a PDP filter.

Comparative Example 1

<Production of Acrylic Resin>

80 parts of butyl acrylate, 18 parts of methyl acrylate, 2 parts of acrylic acid, and 150 parts of ethyl acetate were put into the polymerization container, and nitrogen substitution was performed at room temperature for 1 hour. Then, it heated up at 75 degreeC under stirring, added 0.02 part of AIBN as a polymerization initiator, superposed | polymerized at 75 degreeC for 6 hours, and produced the acrylic ester polymer. The weight average molecular weight of this acrylic acid ester polymer was 1 million.

<Production of Neon Light Absorption Film>

A neon light absorbing film having anti-reflective properties was obtained in the same manner as in Example 1 except that the acrylic resin of Example 1 was changed.

Comparative Example 2

<Production of Acrylic Resin>

96 parts of butyl acrylates, 4 parts of acrylic acid, and 150 parts of ethyl acetate were put into the polymerization container, and nitrogen substitution was performed at room temperature for 1 hour. Then, it heated up at 75 degreeC under stirring, added 0.02 part of AIBN as a polymerization initiator, superposed | polymerized at 75 degreeC for 6 hours, and produced the acrylic ester polymer. The weight average molecular weight of this acrylate ester polymer was 1,090,000.

<Production of Neon Light Absorption Film>

A neon light absorbing film having anti-reflective properties was obtained in the same manner as in Example 1 except that the acrylic resin of Example 1 was changed.

Comparative Example 3

<Production of Acrylic Resin>

80 parts of butyl acrylate, 13 parts of methyl acrylate, 2 parts of acrylic acid, 5 parts of N, N-dimethylamide acrylate, and 150 parts of ethyl acetate were put into the polymerization container, and nitrogen substitution was performed at room temperature for 1 hour. Then, it heated up at 75 degreeC under stirring, added 0.02 part of AIBN as a polymerization initiator, superposed | polymerized at 75 degreeC for 6 hours, and produced the acrylic ester polymer. The weight average molecular weight of this acrylic acid ester polymer was 1,070,000.

<Production of Neon Light Absorption Film>

Except changing the acrylic resin of Example 1, the neon light absorption film which has anti-reflective property was obtained by Example 1 and a method.

<Test method>

The luminous transmittance (Y /%) and chromaticity coordinates (x, y) of the test piece of each Example film and each Comparative Example film were measured, and it measured 100 by the carbon arc fade meter (カ-ボ ア-ク フ ェ-ド メ-タ-). The energy of 18 kJ / cm ² was irradiated over time, and then the luminous transmittance (Y /%) and chromaticity coordinates (x, y) were measured again.

Measurement is carried out using UV-3150 (trade name, spectrophotometer, Shimadzu Corporation), and the luminous transmittance (Y /%) and chromaticity coordinates (x, y) are calculated according to the color display method using the XYZ colorimeter of JIS Z 8701. It was.

As the carbon arc fade meter, an ultraviolet fade meter U48H (manufactured by Suga Test Instruments) was used.

The results before and after the light resistance test are shown in Table 1.

TABLE 1

<Consideration of results>

Examples 1 to 3 had little change in color tone before and after the light resistance test and were able to obtain good results with respect to the change in the neon light absorbing ability at 592 nm. In Comparative Examples 1 to 3, the change in color tone before and after the light resistance test was large, and the change in neon light absorbing ability was also large.

Claims (6)

(a) 70.1-99.9 weight% of (meth) acrylic-acid alkylesters of 4-12 carbon atoms of an alkyl group, 0.1-10 weight% of the hydroxyl-containing monomer copolymerizable with (b) component, and (c) (a) Pressure-sensitive adhesive consisting of a crosslinking acrylic resin and a crosslinking agent copolymerized with the component and the other monomer copolymerizable with the component (b) in an amount of 0.1 to 19.9% by weight ((a) + (b) + (C) is 100% by weight). An adhesive layer composed of the adhesive is provided on one surface of a transparent substrate, and the adhesive layer contains a neon light absorbing dye. The film for optical filters according to claim 1, wherein the crosslinking agent is a block type isocyanate. The film for optical filters of Claim 1 or 2 whose neon light absorption pigment | dye is a tetraaza porphyrin pigment | dye. The optical filter film according to any one of claims 1 to 3, wherein the pressure-sensitive adhesive contains a tackifier made of a terpene phenol resin. The at least one layer chosen from a hard-coat layer, a conductive layer, an anti-glare layer, and an antireflection layer is laminated | stacked on the opposite surface of the surface which has an adhesive layer of the transparent base material which provided the adhesive layer in any one of Claims 1-4. Film for optical filters characterized by the above-mentioned. The optical filter film of any one of Claims 1-5 was laminated | stacked on the film or glass which has near-infrared and / or electromagnetic wave shielding function, The optical filter for plasma display panels characterized by the above-mentioned.