TW201732323A - Organic electroluminescent display device - Google Patents

Abstract

This organic electroluminescent display device comprises: an optical laminate containing a polarizer, a retardation film, and at least one other layer; and an organic electroluminescent panel. A UV absorber and a dye compound in which the maximum absorption wavelength of the absorption spectrum is within the 380-430 nm wavelength range are included in separate layers constituting the optical laminate. The layer comprising the UV absorber is present further to the visible side than the layer comprising the dye compound. The organic electroluminescent display device is provided with a mechanism that makes it possible to minimize deterioration of an organic electroluminescent element.

Description

Organic EL display device

FIELD OF THE INVENTION The present invention relates to an organic EL (electroluminescence) display device (OLED).

Background of the Invention In recent years, organic EL display devices equipped with organic EL panels have been widely used in various applications such as mobile phones, car navigation devices, personal computer monitors, and televisions. In general, the organic EL display device has a circular polarizing plate (a laminate of a polarizing plate and a quarter-wave plate, etc.) disposed on the viewing side surface of the organic EL panel in order to prevent external light from being reflected by the metal electrode (cathode). . Further, a decorative panel or the like may be further laminated on a circularly polarizing plate laminated on the viewing side surface of the organic EL panel. The constituent members of the organic EL display device such as the circular polarizing plate or the decorative panel are usually laminated via a bonding material such as an adhesive layer or an adhesive layer.

It is known that a video display device such as an organic EL display device may deteriorate a constituent member or the like inside the image display device due to incident ultraviolet rays. Therefore, a layer containing an ultraviolet absorber may be provided to suppress deterioration due to the ultraviolet ray. Specifically, for example, there is known a transparent double-sided adhesive sheet for an image display device which has at least one ultraviolet absorbing layer and has a light transmittance of 30% or less at a wavelength of 380 nm and a visible light transmission on a longer wavelength side than a wavelength of 430 nm. The rate is 80% or more (see, for example, Patent Document 1); or an adhesive sheet having an adhesive layer containing an acrylic polymer and a triterpene-based ultraviolet absorber (see, for example, Patent Document 2). Prior Technical Literature Patent Literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2012-211305. Patent Document 2: JP-A-2013-75978

SUMMARY OF THE INVENTION Problems to be Solved by the Invention The adhesive sheets described in Patent Documents 1 and 2 can suppress the transmittance of light having a wavelength of 380 nm. However, when the adhesive sheet is applied to an organic EL display device, the organic EL element may be long. It is degraded by time use and cannot be called perfect. This is considered to be because the adhesive sheet described in Patent Documents 1 and 2 can absorb light having a wavelength of 380 nm, but cannot sufficiently absorb the wavelength region on the shorter wavelength side than the light-emitting region of the organic EL element (on the longer wavelength side than 430 nm). Light (380 nm to 430 nm) deteriorates due to the transmitted light.

Therefore, in order to suppress the deterioration of the organic EL element, it is necessary to provide an organic EL display device having a mechanism capable of suppressing the wavelength on the shorter wavelength side than the light-emitting region (the longer wavelength side than the 430 nm) of the organic EL element ( The light of 380 nm to 430 nm is transmitted, and the transmittance of visible light in the light-emitting region of the organic EL element can be sufficiently ensured.

Accordingly, an object of the present invention is to provide an organic EL display device including a mechanism capable of suppressing deterioration of an organic EL element. Means to solve the problem

The inventors of the present invention have found the following organic EL display device in order to solve the above problems and have completed the present invention.

In other words, the present invention relates to an organic EL display device comprising: an optical layered body including a polarizer, a retardation film, and at least one layer other than the optical layered body; Each layer of the laminate is blended with a UV absorber and a pigment compound. The maximum absorption wavelength of the absorption spectrum of the pigment compound is in the wavelength region of 380 to 430 nm, and the layer having the ultraviolet absorber is present in the layer having the pigment compound. View the side.

Preferably, the optical layered body comprises an adhesive layer, a transparent protective film, a polarizing member, a retardation film and an adhesive layer at least sequentially from the viewing side, and the ultraviolet absorber is blended on the side of the polarizing member. In the layer, the dye compound is blended in a layer on the side of the organic EL panel than the polarizer.

Preferably, the ultraviolet absorbing agent is blended in at least one layer selected from the group consisting of the adhesive layer, the transparent protective film, and the retardation film, and the dye compound is preferably blended in the adhesive layer. .

The pigment compound is preferably an organic dye compound.

The maximum absorption wavelength of the absorption spectrum of the ultraviolet absorber is preferably in the wavelength region of 300 to 400 nm. Effect of the invention

In the organic EL display device of the present invention, the layer containing the ultraviolet ray absorbing agent and the dye compound having the absorption wavelength maximum absorption wavelength in the wavelength region of 380 to 430 nm exists in a specific order, and therefore is higher than the luminescent region of the organic EL element (more than 430 nm) On the long wavelength side, light having a wavelength (380 nm to 430 nm) on the short wavelength side can be sufficiently absorbed, and deterioration of the organic EL element can be suppressed. In particular, in the present invention, since the layer containing the ultraviolet absorber is present on the side of the side other than the layer containing the dye compound, the dye compound can be prevented from being exposed to ultraviolet rays and deteriorated, so that deterioration of the organic EL element can be more highly suppressed. .

The organic EL display device of the present invention includes an optical layered body including a polarizer, a retardation film, and at least one layer other than the organic EL display device. Each layer of the optical layered body is blended with a UV absorber and a pigment compound. The maximum absorption wavelength of the absorption spectrum of the pigment compound exists in a wavelength region of 380 to 430 nm, and a layer having a UV absorber is present in a layer having a pigment compound. Rely on the side.

The optical layered body may include a polarizer, a retardation film, and at least one layer other than the above, and the other layers are not particularly limited. A suitable embodiment of the optical laminate is shown in Figure 1, but the invention is not limited thereto.

As shown in FIG. 1, the optical laminate 1 is laminated with at least a layer of an adhesive layer 2/transparent protective film 3/polarizer 4/phase difference film 5/adhesive layer 6 from the viewing side, or in sequence. Laminated adhesive layer 2/(view side) transparent protective film 3/polarizer 4/organic EL panel side transparent protective film/organic EL panel side first adhesive layer (or adhesive layer)/phase difference film 5 / (Organic EL panel side 2nd) Adhesive layer 6. Further, other functional layers such as a hard coat layer, an antiglare treatment layer, and an antireflection layer, or a sensor layer, and an adhesive layer or an adhesive layer for laminating these may be contained. The transparent protective film 4 / polarizer 5 may also be referred to as a polarizing film.

In the present invention, the ultraviolet absorber and the dye compound are blended in different layers constituting the optical layered body, and the layer containing the ultraviolet absorber may be disposed on the side opposite to the layer containing the dye-containing compound (including the dye compound). The layer is more on the side of the organic EL panel than the layer containing the ultraviolet absorber, and the layer to be blended is not particularly limited. Further, in the optical laminate, the layer containing the ultraviolet absorber is disposed on the side opposite to the polarizer and the layer containing the dye compound is disposed on the side of the organic EL panel than the polarizer. With this configuration, the light incident on the layer containing the dye compound is shielded from ultraviolet rays by the layer containing the ultraviolet absorber, and the amount of light is reduced by the polarizer. Therefore, deterioration of the dye compound can be prevented, and deterioration of the organic EL element can be suppressed to a high degree.

The layer to which the ultraviolet absorber may be blended is preferably at least one layer selected from the group consisting of the adhesive layer 2, the transparent protective film 3, and the retardation film 5, and is preferably an adhesive layer. 2 or the transparent protective film 3, the adhesive layer 2 is particularly preferred. Further, the ultraviolet absorber may be blended in a layer of two or more layers, for example, both of the adhesive layer 2 and the transparent protective film 3. Further, the layer in which the dye compound can be blended is specifically preferably the retardation film 5 or the adhesive layer 6, and the adhesive layer 6 is preferable. Further, the pigment compound may be blended in a layer of two or more layers, for example, may be blended in both the retardation film 5 and the adhesive layer 6, and when the adhesive layer 6 has two or more layers, it may be blended in a plurality of layers. In the adhesive layer 6. Further, when the polarizing film is a double-sided protective polarizing film, a coloring compound may be added to the transparent protective film on the organic EL panel side.

The various materials used in the present invention and the layers of the optical laminate are described in detail below.

(1) Ultraviolet Absorber The ultraviolet absorber is not particularly limited, and examples thereof include a triterpene ultraviolet absorber, a benzotriazole ultraviolet absorber, a diphenylketone ultraviolet absorber, and an oxydiphenylketone system. The ultraviolet absorber, the salicylate-based ultraviolet absorber, the cyanoacrylate-based ultraviolet absorber, and the like may be used alone or in combination of two or more. Among these, it is preferably a tri-anthraquinone-based ultraviolet absorber or a benzotriazole-based ultraviolet absorber, and is selected from the group consisting of three or more ultraviolet absorbers having two or less hydroxyl groups in one molecule, and At least one ultraviolet absorber of the group consisting of a benzotriazole-based ultraviolet absorber having one benzotriazole skeleton in the molecule has good solubility in a monomer for forming an acrylic pressure-sensitive adhesive composition. Further, it is suitable because the ultraviolet absorbing ability in the vicinity of the wavelength of 380 nm is high.

The three-dimensional ultraviolet absorber having two or less hydroxyl groups in one molecule may specifically be exemplified by 2,4-bis-[{4-(4-ethylhexyloxy)-4-hydroxy}-phenyl] -6-(4-methoxyphenyl)-1,3,5-triterpene? (Tinosorb S, manufactured by BASF), 2,4-bis[2-hydroxy-4-butoxyphenyl]-6- (2,4-Dibutoxyphenyl)-1,3,5-triterpene? (TINUVIN 460, manufactured by BASF), 2-(4,6-bis(2,4-dimethylphenyl)- Reaction product of 1,3,5-tris-?-2-yl)-5-hydroxyphenyl with [(C10-C16(mainly C12-C13)alkyloxy)methyl]oxirane (TINUVIN 400, manufactured by BASF), 2-[4,6-bis(2,4-dimethylphenyl)-1,3,5-tris-?-2-yl]-5-[3-( Dodecyloxy)-2-hydroxypropoxy]phenol), 2-(2,4-dihydroxyphenyl)-4,6-bis-(2,4-dimethylphenyl)-1 , 3,5-triterpene-?(2-ethylhexyl)-dehydroglyceride reaction product (TINUVIN 405, manufactured by BASF), 2-(4,6-diphenyl-1,3, 5-tris-?-2-yl)-5-[(hexyl)oxy]-phenol (TINUVIN 1577, manufactured by BASF), 2-(4,6-diphenyl-1,3,5-triazine ??-2-yl)-5-[2-(2-ethylhexyloxy)ethoxy]-phenol (ADK STAB LA46, manufactured by ADEKA), 2-(2-hydroxy-4-) [1-octyloxycarbonylethoxy]phenyl)-4,6-bis(4-phenylphenyl)-1,3,5-triterpene?(TI NUVIN 479, manufactured by BASF), 6,6',6''-(1,3,5-triterpene?-2,4,6-triyl) ginseng (3-hexyloxy-2-methyl) Phenol) (LA-F70, manufactured by ADEKA).

Further, a benzotriazole-based ultraviolet absorber having one benzotriazole skeleton in one molecule is exemplified by 2-(2H-benzotriazol-2-yl)-6-(1-methyl-1- Phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol (TINUVIN 928, manufactured by BASF), 2-(2-hydroxy-5-tertiary butylphenyl)-2H -benzotriazole (TINUVIN PS, manufactured by BASF), phenylpropionic acid and 3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxy ( Ester compound of C7-9 side chain and linear alkyl group (TINUVIN 384-2, manufactured by BASF), 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl- 1-phenylethyl)phenol (TINUVIN 900, manufactured by BASF), 2-(2H-benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-( 1,1,3,3-tetramethylbutyl)phenol (TINUVIN 928, manufactured by BASF), methyl-3-(3-(2H-benzotriazol-2-yl)-5-tertiary butyl Reaction product of -4-hydroxyphenyl)propionate/polyethylene glycol 300 (TINUVIN 1130, manufactured by BASF), 2-(2H-benzotriazol-2-yl)-p-cresol (TINUVIN P, 2,2,2H-benzotriazol-2-yl)-4-6-bis(1-methyl-1-phenylethyl)phenol (TINUVIN 234, manufactured by BASF), 2-[5- Chloro(2H)-benzotriazol-2-yl]-4-methyl-6-(tributyl)phenol (TINUVIN 326, manufactured by BASF), 2-(2H-benzotriazol-2-yl) )-4,6-di-tertiary pentylphenol (TINUVIN 328, manufactured by BASF), 2-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethyl Butyl)phenol (TINUVIN 329, manufactured by BASF), methyl 3-(3-(2H-benzotriazol-2-yl)-5-tributyl-4-hydroxyphenyl)propionate and poly Reaction product of ethylene glycol 300 (TINUVIN 213, manufactured by BASF), 2-(2H-benzotriazol-2-yl)-6-dodecyl-4-methylphenol (TINUVIN 571, manufactured by BASF) , 2-[2-hydroxy-3-(3,4,5,6-tetrahydroindenyl-methyl)-5-methylphenyl]benzotriazole (Sumisorb 250, Sumitomo Chemical Industries Co., Ltd.) , 2-(2-hydroxy-3-tri-butyl-5-methylphenyl)-5-chlorobenzotriazole (SeeSorb 703, manufactured by Shipro Kase Kaisha, Ltd. or KEMISORB 73, Shipro Kase Kaisha) , Ltd.) and so on.

Further, the diphenylketone-based ultraviolet absorber (diphenylketone-based compound) and the oxydiphenylketone-based ultraviolet absorber (oxydiphenylketone-based compound) may be, for example, 2,4-dihydroxyl Phenyl ketone, 2-hydroxy-4-methoxydiphenyl ketone, 2-hydroxy-4-methoxydiphenyl ketone-5-sulfate (anhydride and trihydrate), 2-hydroxy-4-octyloxy Diphenyl ketone, 4-dodecyloxy-2-hydroxydiphenyl ketone, 4-benzyloxy-2-hydroxydiphenyl ketone, 2,2 ́, 4,4 ́-four Hydroxydiphenyl ketone, 2,2 ́-dihydroxy-4,4-dimethoxydiphenyl ketone, 2,2',4,4'-tetrahydroxydiphenyl ketone (SeeSorb 106, Shipro Kase Kaisha, Ltd.), 2,2'-dihydroxy-4-methoxydiphenyl ketone (KEMISORB 111, manufactured by Chemipro Chemical Co., Ltd.).

Further, the salicylate-based ultraviolet absorber (salicylate-based compound) may, for example, be phenyl-2-propenyloxybenzoate or phenyl-2-propenyloxy-3-carboxylate. Benzobenzoate, phenyl-2-propenyloxy-4-methylbenzoate, phenyl-2-propenyloxy-5-methylbenzoate, phenyl-2-propene醯oxy-3-methoxybenzoate, phenyl-2-hydroxybenzoate, phenyl-2-hydroxy-3-methylbenzoate, phenyl-2-hydroxy-4methyl Benzoate, phenyl-2-hydroxy-5-methylbenzoate, phenyl 2-hydroxy-3-methoxybenzoate, 2,4-di-tert-butylphenyl-3 5-Di-tertiary butyl-4-hydroxybenzoate (TINUVIN 120, manufactured by BASF).

The cyanoacrylate ultraviolet absorber (cyanoacrylate compound) may, for example, be an alkyl-2-cyanoacrylate, a cycloalkyl-2-cyanoacrylate or an alkoxyalkyl-2-cyanide. Acrylate, alkenyl-2-cyanoacrylate, alkynyl-2-cyanoacrylate, and the like.

The maximum absorption wavelength of the absorption spectrum of the ultraviolet absorber is preferably in the wavelength range of 300 to 400 nm, and is preferably in the wavelength range of 300 to 380 nm. Here, the maximum absorption wavelength refers to the absorption maximum wavelength at which the maximum absorbance is exhibited in the spectral absorption spectrum in the wavelength region of 300 to 460 nm.

The ultraviolet absorber may be used singly or in combination of two or more kinds, and the total content of the ultraviolet absorber is preferably about 0.1 to 10% by weight, based on the total weight (100% by weight) of the layer to which the ultraviolet absorber is added, 0.1~ About 8% by weight is preferred. By setting the addition amount of the ultraviolet absorber to the above range, the ultraviolet absorber addition layer can sufficiently exhibit the ultraviolet absorption function, which is suitable. Further, when the ultraviolet absorber is added to two or more layers, the ultraviolet absorbing dose of all the layers is preferably within the above range.

Further, when the ultraviolet absorber is added to the adhesive layer 2, the ultraviolet absorber may be used singly or in combination of two or more kinds, and the single layer of the base polymer capable of forming the adhesive layer 2 may be used. The content of the entire ultraviolet absorber is preferably from 0.1 to 8 parts by weight, preferably from 0.5 to 5 parts by weight, per 100 parts by weight of the functional monomer component. When the amount of the ultraviolet absorber added is within the above range, the ultraviolet absorbing function of the pressure-sensitive adhesive layer can be sufficiently exhibited, and the polymerization is not inhibited when the ultraviolet ray polymerization is carried out, which is preferable. Further, when the ultraviolet absorber is added to two or more layers, the ultraviolet absorbing dose of all the layers is preferably within the above range.

(2) Pigment Compound The dye compound to be used in the present invention is not particularly limited as long as it is a compound having a maximum absorption wavelength of the absorption spectrum in a wavelength region of 380 to 430 nm. The maximum absorption wavelength of the absorption spectrum of the dye compound is preferably in the wavelength region of 380 to 420 nm. Here, the maximum absorption wavelength refers to the absorption maximum wavelength at which the maximum absorbance is exhibited in the spectral absorption spectrum in the wavelength region of 300 to 460 nm. In addition, the dye compound is not particularly limited as long as it has the above-described wavelength characteristics, but a material which does not inhibit the display property of the organic EL element and which does not have fluorescence and phosphorescence (photoluminescence) is preferable.

Further, the half value width of the dye compound is not particularly limited, but is preferably 80 nm or less, more preferably 5 to 70 nm, and still more preferably 10 to 60 nm. When the half value width of the dye compound is within the above range, it is possible to control the light which sufficiently absorbs the region which does not affect the light emission of the organic EL element and at the same time sufficiently transmit the light on the longer wavelength side than 430 nm. In addition, the method of measuring the half value width uses the method described below. <Measurement Method of Half Value Width> The half value width of the dye compound was measured from the transmission absorption spectrum of the dye compound solution under the following conditions using an ultraviolet-visible spectrophotometer (U-4100, manufactured by Hitachi High-Tech Science Co.). The concentration was adjusted so that the absorbance at the maximum absorption wavelength was 1.0, and the wavelength interval (full width at half maximum) between the two points having a peak value of 50% from the measured spectral spectrum was taken as the half value width of the dye compound. (Measurement conditions) Solvent: Toluene or chloroform Groove: Quartz tank Optical path length: 10 mm

The dye compound may be a compound having a maximum absorption wavelength of the absorption spectrum in a wavelength region of from 380 to 430 nm, and the structure thereof is not particularly limited. The pigment compound may be an organic dye compound or an inorganic dye compound. From the viewpoint of dispersibility to a resin component such as a base polymer and transparency, it is preferable to use an organic dye compound. The organic dye compound is preferably a material which does not have fluorescence and phosphorescence (photoluminescence).

Examples of the organic dye compound include a nitrimethyl azo compound, an anthraquinone compound, a cinnamic acid compound, a pyrimidine compound, and a porphyrin compound.

As the above-mentioned organic dye compound, a commercially available product can be suitably used. Specifically, the above-mentioned oxime-based compound may be, for example, BONASORB UA3911 (trade name, maximum absorption wavelength of absorption spectrum: 398 nm, half-value width: 48 nm, Orient Chemical Industries Co., Ltd.) .), BONASORB UA3912 (trade name, maximum absorption wavelength of absorption spectrum: 386 nm, half-value width: 53 nm, manufactured by Orient Chemical Industries Co., Ltd.), and the cinnamic acid-based compound may be SOM-5-0106 ( The product name and the absorption wavelength of the absorption spectrum are: 416 nm, half-value width: 50 nm, manufactured by Orient Chemical Industries Co., Ltd., and the porphyrin-based compound is FDB-001 (trade name, maximum absorption wavelength of the absorption spectrum). : 420 nm, half-value width: 14 nm, manufactured by Yamada Chemical Industry Co., Ltd., and the like.

The above-mentioned coloring matter compound may be used singly or in combination of two or more kinds thereof, and the content of the entire coloring matter compound is preferably about 0.01 to 10% by weight, 0.02 to 7 based on the total weight (100% by weight) of the layer to which the coloring compound is added. It is preferably about weight%. When the amount of the dye compound to be added is within the above range, light which does not affect the light-emitting region of the organic EL element can be sufficiently absorbed, and deterioration of the organic EL element can be suppressed, which is preferable.

In addition, when the coloring matter compound is added to the pressure-sensitive adhesive layer 6, the coloring matter compound may be used singly or in combination of two or more kinds, and the monofunctional monomer component may be formed with respect to the base polymer which forms the adhesive layer. The content of the entire pigment compound is preferably from 0.01 to 10 parts by weight, preferably from 0.02 to 5 parts by weight, per 100 parts by weight. When the amount of the dye compound to be added is within the above range, light which does not affect the light-emitting region of the organic EL element can be sufficiently absorbed, and deterioration of the organic EL element can be suppressed, which is preferable. Further, when the dye compound is added to two or more layers, the amount of the dye compound in all the layers is preferably within the above range.

(3) Optical laminate The optical laminate used in the present invention has the adhesive layer 2/transparent protective film 3/polarizer 4/phase difference film 5/adhesive layer laminated at least sequentially from the side of the viewing side. 6 is suitable (Fig. 1), or a layer of adhesive layer 2/(visual side) transparent protective film 3/polarizer 4/organic EL panel side transparent protective film/organic EL panel side first adhesion The agent layer (or the adhesive layer) / the retardation film 5 / (the second layer on the organic EL panel side) of the adhesive layer 6. Other than these, a functional layer such as a hard coat layer, an antiglare layer, an antireflection layer, or a sensor layer, and an adhesive layer or an adhesive layer for laminating these may be contained.

(3-1) Adhesive Layer 2 In the present invention, the "adhesive layer" means an adhesive layer or an adhesive layer.

(3-1-1) Adhesive Layer The subsequent layer may be a layer composed of any appropriate and suitable adhesive. Examples of such an adhesive include a natural rubber adhesive, an α-olefin based adhesive, an urethane resin adhesive, an ethylene-vinyl acetate resin latex adhesive, and an ethylene-vinyl acetate resin hot melt adhesive. An epoxy resin-based adhesive, a vinyl chloride resin solvent-based adhesive, a chloroprene rubber-based adhesive, a cyanoacrylate-based adhesive, a polyfluorene-based adhesive, and a styrene-butadiene rubber solvent. Agent, nitrile rubber-based adhesive, nitrocellulose-based adhesive, reactive hot-melt adhesive, phenol resin-based adhesive, modified polyoxynized adhesive, polyester hot-melt adhesive, and polyamide heat A fluxing agent, a polyimide-based adhesive, a polyurethane resin hot-melt adhesive, a polyolefin resin hot-melt adhesive, a polyvinyl acetate resin solvent-based adhesive, a polystyrene resin solvent-based adhesive, Polyvinyl alcohol-based adhesive, polyvinylpyrrolidone resin-based adhesive, polyvinyl butyral-based adhesive, polybenzimidazole adhesive, polymethacrylate resin solvent-based adhesive, melamine resin-based adhesive , Resin-based adhesive, resorcinol-based adhesive agent. These adhesives may be used alone or in combination of two or more.

The adhesive may be a thermosetting adhesive, a hot melt adhesive or the like, if it is classified according to the following form. These adhesives may be used alone or in combination of two or more.

The thermosetting type adhesive is thermally cured by heating and cured to exhibit an adhesive force. Examples of the thermosetting adhesive include an epoxy thermosetting adhesive, an urethane thermosetting adhesive, and an acrylic thermosetting adhesive. The hardening temperature of the thermosetting adhesive is, for example, 100 to 200 °C.

The hot melt adhesive is melted or softened by heat to be melted on the adherend, and then solidified by cooling to be adhered to the adherend. Examples of the hot-melt adhesive include a rubber-based hot-melt adhesive, a polyester-based hot-melt adhesive, a polyolefin-based hot-melt adhesive, an ethylene-vinyl acetate resin-based hot-melt adhesive, and a polyamide resin hot-melt adhesive. , polyurethane resin hot melt adhesive, and the like. The softening temperature of the hot melt adhesive (ring and ball method) is, for example, 100 to 200 °C. Further, the hot melt adhesive has a melt viscosity of 180 ° C, for example, 100 to 30000 mPa·s.

The thickness of the layer is not particularly limited, and is preferably about 0.01 to 10 μm, preferably about 0.05 to 8 μm.

(3-1-2) The type of the adhesive composition for forming the adhesive layer of the adhesive layer is not particularly limited, and examples thereof include a rubber-based adhesive, an acrylic adhesive, a polyoxygen-based adhesive, and a urethane. An adhesive, a vinyl alkyl ether-based adhesive, a polyvinyl alcohol-based adhesive, a polyvinylpyrrolidone-based adhesive, a polypropylene amide-based adhesive, or a cellulose-based adhesive. Among these adhesives, an acrylic adhesive is preferably used from the viewpoints of excellent optical transparency, adhesion exhibiting moderate adhesion, cohesiveness and adhesion, and excellent weather resistance and heat resistance. In the present invention, an acrylic adhesive composition containing a (meth)acrylic polymer as a base polymer is preferred.

The acrylic adhesive composition preferably contains a partial polymer such as a monomer component containing an alkyl (meth)acrylate and/or a (meth)acrylic polymer obtained from the monomer component, and An ultraviolet absorber or a pigment compound is added to the acrylic adhesive composition.

(Partial polymer of monomer component and (meth)acrylic polymer) The acrylic adhesive composition contains a partial polymer containing a monomer component of an alkyl (meth)acrylate and/or a monomer A (meth)acrylic polymer obtained as a component.

The alkyl (meth)acrylate may, for example, be a linear or branched alkyl group having 1 to 24 carbon atoms at the ester terminal. The alkyl (meth)acrylate may be used alone or in combination of two or more. Further, "alkyl (meth)acrylate" means an alkyl acrylate and/or an alkyl methacrylate, and the (meth) table of the present invention has the same meaning.

The alkyl (meth)acrylate may be a linear or branched chain alkyl (meth)acrylate having 1 to 24 carbon atoms, and the number of carbon atoms is 1 to 9 (methyl). An alkyl acrylate is preferred, and a branched alkyl (meth) acrylate having a carbon number of 4 to 9 is a suitable example. The alkyl (meth)acrylate is preferred from the viewpoint of easily obtaining a balance of adhesion characteristics. The branched alkyl (meth)acrylate having a carbon number of 4 to 9 may specifically be: n-butyl (meth)acrylate, n-butyl (meth)acrylate, or tertiary (meth)acrylic acid. Butyl ester, isobutyl (meth)acrylate, n-amyl (meth)acrylate, isoamyl (meth)acrylate, isohexyl (meth)acrylate, isoheptyl (meth)acrylate, (methyl) (2-ethylhexyl acrylate, isooctyl (meth) acrylate, isodecyl (meth) acrylate, etc.) These may be used alone or in combination of two or more.

In the present invention, the alkyl (meth)acrylate having an alkyl group having 1 to 24 carbon atoms at the ester terminal is present in the total amount of the monofunctional monomer component forming the (meth)acrylic polymer. 40% by weight or more is preferable, 50% by weight or more is preferable, and 60% by weight or more is more preferable.

The monomer component may contain a comonomer other than the aforementioned alkyl (meth)acrylate as a monofunctional monomer component. The comonomer can be used as the remainder of the aforementioned (meth)acrylic acid alkyl ester as a monomer component.

The comonomer may, for example, contain a cyclic nitrogen-containing monomer. The cyclic nitrogen-containing monomer may be a polymerizable functional group having an unsaturated double bond such as a (meth)acryl fluorenyl group or a vinyl group and having a cyclic nitrogen structure, without particular limitation. The cyclic nitrogen structure is preferably one having a nitrogen atom in the cyclic structure. The cyclic nitrogen-containing monomer may, for example, be an internal guanamine-based vinyl monomer such as N-vinylpyrrolidone, N-vinyl-ε-caprolactam or methylvinylpyrrolidone; vinylpyridine or vinylper A vinyl-based monomer having a nitrogen-containing heterocyclic ring such as a ketone, a vinyl pyrimidine, an ethylene piperazine, a vinylpyrrolidone, a vinylpyrrole, a vinylimidazole, a vinylcarbazole or an ethylene benzophenone. Further, a (meth)acrylic monomer containing a heterocyclic ring such as a toughin ring, a piperidine ring, a pyrrolidine ring or a piperidine ring may be mentioned. Specific examples thereof include N-propylene hydrazine, N-propylene piperidine, N-methyl propylene piperidine, and N-propene pyrrolidine. Among the above-mentioned cyclic nitrogen-containing monomers, an internal guanamine-based vinyl monomer is preferred.

In the present invention, the cyclic nitrogen-containing monomer is preferably 0.5 to 50% by weight, preferably 0.5 to 40% by weight, based on the total amount of the monofunctional monomer component forming the (meth)acrylic polymer. More preferably ~30% by weight.

The monomer component used in the present invention may contain a hydroxyl group-containing monomer as a monofunctional monomer component. As the hydroxyl group-containing monomer, a polymerizable functional group having an unsaturated double bond such as a (meth)acryl fluorenyl group or a vinyl group and having a hydroxyl group can be used without particular limitation. The hydroxyl group-containing monomer may, for example, be 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate or 3-hydroxypropyl (meth)acrylate. , 4-hydroxybutyl (meth)acrylate, 6-hydroxyhexyl (meth)acrylate, 8-hydroxyoctyl (meth)acrylate, 10-hydroxydecyl (meth)acrylate, (meth)acrylic acid a hydroxyalkyl (meth) acrylate such as 12-hydroxylauryl ester; or a hydroxyalkylcycloalkane (meth) acrylate such as (4-hydroxymethylcyclohexyl)methyl (meth) acrylate. Other examples include hydroxyethyl (meth) acrylamide, allyl alcohol, 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, and diethylene glycol monovinyl ether. These may be used alone or in combination. Among these, hydroxyalkyl (meth) acrylate is preferred.

In the present invention, the hydroxyl group-containing monomer is preferably 1% by weight or more from the viewpoint of improving the adhesion and cohesive force with respect to the total amount of the monofunctional monomer component forming the (meth)acrylic polymer. It is preferably 2% by weight or more, more preferably 3% by weight or more. On the other hand, when the amount of the hydroxyl group-containing monomer is too much, the adhesive layer may become hard to lower the adhesion force, or the viscosity of the adhesive may become too high to be gelatinized, based on these viewpoints, relative to the formation of (meth)acrylic acid. The total amount of the monofunctional monomer component of the polymer is preferably 30% by weight or less, more preferably 27% by weight or less, still more preferably 25% by weight or less.

Further, the monomer component forming the (meth)acrylic polymer may contain another functional group-containing monomer as a monofunctional monomer, and examples thereof include a carboxyl group-containing monomer and a monomer having a cyclic ether group.

As the carboxyl group-containing monomer, a polymerizable functional group having an unsaturated double bond such as a (meth)acryl fluorenyl group or a vinyl group and having a carboxyl group can be used without particular limitation. The carboxyl group-containing monomer may, for example, be (meth)acrylic acid, carboxyethyl (meth)acrylate, carboxypentyl (meth)acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid, isocrotonic acid or the like. They may be used singly or in combination. These anhydrides can be used for itaconic acid and maleic acid. Among these, acrylic acid and methacrylic acid are preferred, and acrylic acid is particularly preferred. Further, a carboxyl group-containing monomer may be optionally used in the monomer component for producing the (meth)acrylic polymer of the present invention, but a carboxyl group-containing monomer may not be used.

The monomer having a cyclic ether group can be a polymerizable functional group having an unsaturated double bond such as a (meth) acryl fluorenyl group or a vinyl group and having a cyclic ether such as an epoxy group or an oxycyclobutane group, without particular limitation. Base. The epoxy group-containing monomer may, for example, be a propylenepropyl (meth) acrylate, a 3,4-epoxycyclohexylmethyl (meth) acrylate or a 4-hydroxybutyl (meth) acrylate ring. Oxypropyl propyl ether and the like. The oxygen-containing cyclobutylalkyl monomer may, for example, be 3-oxetanylmethyl (meth) acrylate, 3-methyl-oxetanylmethyl (meth) acrylate, 3- Ethyl-oxetanylmethyl (meth) acrylate, 3-butyl-oxetanylmethyl (meth) acrylate, 3-hexyl-oxetanylmethyl (Meth) acrylate, etc. These may be used alone or in combination.

In the present invention, the carboxyl group-containing monomer or the monomer having a cyclic ether group is preferably 30% by weight or less based on the total amount of the monofunctional monomer component forming the (meth)acrylic polymer. It is preferably 1% by weight or less, more preferably 25% by weight or less.

With respect to the monomer component forming the (meth)acrylic polymer of the present invention, the comonomer may be, for example, CH ₂ =C(R ¹ )COOR ² (wherein R ¹ represents hydrogen or a methyl group, and R ² represents a carbon number; The alkyl (meth)acrylate represented by a substituted alkyl group or a cyclic cycloalkyl group of 1 to 3.

Here, the substituent of the substituted alkyl group having 1 to 3 carbon atoms of R ² is preferably a carbon number of 3 to 8 aryl groups or a carbon number of 3 to 8 aryloxy groups. The aryl group is not limited, but a phenyl group is preferred.

Examples of such a monomer represented by CH ₂ =C(R ¹ )COOR ² include phenoxyethyl (meth) acrylate, benzyl (meth) acrylate, and cyclohexyl (meth) acrylate. And 3,3,5-trimethylcyclohexyl (meth) acrylate, isodecyl (meth) acrylate, and the like. These may be used alone or in combination.

In the present invention, the aforementioned (meth) acrylate represented by CH ₂ = C(R ¹ )COOR ² may be 50% by weight based on the total amount of the monofunctional monomer component forming the (meth)acrylic polymer. The following is used, and it is preferably 45 wt% or less, more preferably 40 wt% or less, and still more preferably 3 wt% or less.

Other comonomers may also use vinyl acetate, vinyl propionate, styrene, α-methylstyrene; polyethylene glycol (meth)acrylate, polypropylene glycol (meth)acrylate, (meth)acrylic acid a diol-based acrylate monomer such as methoxyethylene glycol or (meth)acrylic acid methoxypolypropylene glycol; tetrahydrofurfuryl (meth) acrylate, fluorine (meth) acrylate, or polyoxyl (methyl) Acrylate-based monomer such as acrylate and 2-methoxyethyl acrylate; amide-containing monomer, amine-containing monomer, quinone-containing monomer, N-propylene hydrazinoline, vinyl Ether monomer and the like. Further, as the comonomer, a monomer having a cyclic structure such as fluorene (meth) acrylate or dicyclopentane (meth) acrylate can be used.

Further, a decane-based monomer containing a halogen atom may be mentioned. The decane-based monomer may, for example, be 3-propenylmethoxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxydecane or 4-vinylbutylene. Ethoxy decane, 8-vinyloctyltrimethoxy decane, 8-vinyloctyltriethoxy decane, 10-methylpropenyloxydecyltrimethoxy decane, 10-propenyloxydecyltrimethoxy decane And 10-methacryloxymethoxydecyltriethoxydecane, 10-propenyloxydecyltriethoxydecane, and the like.

In addition to the monofunctional monomer exemplified above, the monomer component forming the (meth)acrylic pressure-sensitive adhesive of the present invention may contain a polyfunctional monomer in order to adjust the cohesive force of the adhesive.

The polyfunctional single system has at least two monomers having a polymerizable functional group having an unsaturated double bond such as a (meth) acrylonitrile group or a vinyl group, and examples thereof include (poly)ethylene glycol di(meth)acrylic acid. Ester, (poly)propylene glycol di(meth)acrylate, neopentyl glycol di(meth)acrylate, pentaerythritol di(meth)acrylate, pentaerythritol tri(meth)acrylate, Dipentaerythritol hexa(meth) acrylate, 1,2-ethanediol di(meth) acrylate, 1,6-hexanediol di(meth) acrylate, 1,12-dodecane a compound of a polyol such as diol di(meth)acrylate, trimethylolpropane tri(meth)acrylate or tetramethylolmethanetri(meth)acrylate and a (meth)acrylic acid ester compound; Allyl methacrylate, vinyl (meth) acrylate, divinyl benzene, epoxy acrylate, polyester acrylate, urethane acrylate, butyl di(meth) acrylate, di(a) Base) hexyl acrylate or the like. Among these, trimethylolpropane tri(meth)acrylate, hexanediol di(meth)acrylate, and dipentaerythritol hexa(meth)acrylate are suitably used. The polyfunctional monomer may be used alone or in combination of two or more.

The amount of the polyfunctional monomer to be used varies depending on the molecular weight, the number of functional groups, and the like. However, it is preferably used in an amount of 3 parts by weight or less based on 100 parts by weight of the total of the monofunctional monomer, and preferably 2 parts by weight or less. 1 part by weight or less is more preferable. Further, the lower limit is not particularly limited, but is preferably 0 parts by weight or more, and more preferably 0.001 parts by weight or more. By using the amount of the polyfunctional monomer within the above range, the adhesion can be enhanced.

The production of the (meth)acrylic polymer is preferably a known production method in which various radical polymerizations such as solution polymerization and ultraviolet (UV) polymerization, such as radiation polymerization, bulk polymerization, and emulsion polymerization, are selected. Further, the obtained (meth)acrylic polymer may be any of a random copolymer, a block copolymer, a graft copolymer and the like.

Further, it is also preferred to use a part of the polymer of the above monomer component in the present invention.

When the (meth)acrylic polymer is produced by radical polymerization, a polymerization initiator, a chain transfer agent, an emulsifier or the like for radical polymerization may be appropriately added to the monomer component to carry out polymerization. The polymerization initiator, the chain transfer agent, the emulsifier, and the like which can be used in the radical polymerization described above are not particularly limited, and can be appropriately selected and used. Further, the weight average molecular weight of the (meth)acrylic polymer can be controlled by the amount of the polymerization initiator, the chain transfer agent used, and the reaction conditions, and the amount of use can be appropriately adjusted according to the types.

For example, in the course of solution polymerization or the like, for example, ethyl acetate, toluene or the like can be used as the polymerization solvent. In the specific solution polymerization example, the reaction is carried out by adding a polymerization initiator under a gas stream of an inert gas such as nitrogen, and is usually carried out under the reaction conditions of about 50 to 70 ° C for about 5 to 30 hours.

The thermal polymerization initiator which can be used for solution polymerization or the like can be, for example, 2,2'-azobisisobutyronitrile, 2,2'-azobis-2-methylbutyronitrile, 2,2'-azobis (2-methylpropionic acid) dimethyl, 4,4'-azobis-4-cyanojimic acid, azobisisoprene, 2,2'-azobis(2-carboxypropane Dihydrochloride hydrochloride, 2,2'-azobis[2-(5-methyl-2-imidazolin-2-yl)propane] dihydrochloride, 2,2'-azo double (2-methylpropionamidine) disulfate, 2,2'-azobis(N,N'-dimethyleneisobutylphosphonium), 2,2'-azobis[N-(2- An azo initiator such as carboxyethyl)-2-methylpropionamidine hydrate (VA-057, manufactured by Wako Pure Chemical Industries, Ltd.); persulfate such as potassium persulfate or ammonium persulfate, and two (2) -ethylhexyl)peroxydicarbonate, bis(4-tert-butylcyclohexyl)peroxydicarbonate, di-secondary butyl peroxydicarbonate, tertiary butyl peroxy neodecanoate , tertiary hexyl peroxytrimethyl acetate, tertiary butyl peroxytrimethyl acetate, dilaurin peroxide, di-n-octyl peroxide, 1,1,3,3-tetramethyl Butylperoxy-2-ethylhexanoate, bis(4-methylbenzhydryl) peroxide, dibenzoguanidine peroxide , peroxide initiators such as tertiary butyl peroxyisobutyrate, 1,1-di(tri-hexylperoxy)cyclohexane, tertiary butyl hydroperoxide, hydrogen peroxide, etc. A redox initiator which combines a peroxide and a reducing agent, such as a combination of a sulfate and sodium hydrogen sulfite, and a combination of a peroxide and sodium ascorbate, is not limited by these.

The polymerization initiator may be used singly or in combination of two or more kinds thereof, and the polymerization initiator is preferably about 1 part by weight or less, preferably about 0.005 to 1 part by weight, based on 100 parts by weight of the total of the monomer components. More preferably, it is about 0.5 parts by weight.

When 2,2'-azobisisobutyronitrile is used as the polymerization initiator, the polymerization initiator is preferably used in an amount of 0.2 part by weight or less based on 100 parts by weight of the total of the monomer components, and is determined to be 0.06 to 0.2. It is preferably about the weight part.

The chain transfer agent may, for example, be lauryl mercaptan, propylene propyl thiol, thioglycolic acid, 2-mercaptoethanol, indole acetic acid, 2-ethylhexyl acetate, 2,3-dimercapto-1-propanol or the like. . The chain transfer agent may be used singly or in combination of two or more kinds, and the total content is about 0.3 part by weight or less based on 100 parts by weight of the total of the monomer components.

Further, the emulsifier used in the emulsion polymerization may, for example, be sodium lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, ammonium polyoxyalkylene ether sulfate, or polyoxyethylene ethylene. Anionic emulsifier such as sodium phenyl ether sulfate; polyoxyethylene ethyl ether, polyoxyethylene ethyl phenyl ether, polyoxyethyl alcohol ester, polyoxyethylene ethyl-polyoxypropylene A nonionic emulsifier such as a base block polymer. These emulsifiers may be used alone or in combination of two or more.

Further, as the reactive emulsifier, an emulsifier having a radical polymerizable functional group such as a propenyl group or an allyl ether group has been introduced, and specifically, for example, Aqualon HS-10, HS-20, KH-10, BC- 05, BC-10, BC-20 (all of which are manufactured by First Industrial Pharmaceutical Co., Ltd.), Adeka Reasoap SE10N (made by Adeka Co., Ltd.), and the like. The emulsifier is preferably used in an amount of 5 parts by weight or less based on 100 parts by weight of the total of the monomer components.

In addition, when the (meth)acrylic polymer is produced by radiation polymerization, it can be produced by irradiating the monomer component with radiation such as electron beams or ultraviolet rays (UV). In this case, ultraviolet polymerization is preferred. The ultraviolet polymerization of a suitable aspect in radiation polymerization will be described below.

In the case of ultraviolet polymerization, it is preferred to contain a photopolymerization initiator in a monomer component from the viewpoint of the advantage of shortening the polymerization time.

The photopolymerization initiator (B) having an absorption band having a wavelength of 400 nm or less is exemplified as the photopolymerization initiator. Further, the photopolymerization initiator (B) preferably does not have an absorption band having a wavelength of 400 nm or more. The photopolymerization initiator (B) is a photopolymerization initiator which is a photopolymerization initiator, and is not particularly limited as long as it has an absorption band having a wavelength of 400 nm or less, and a photopolymerization initiator which is generally used can be suitably used arbitrarily. For example, a benzoin ether photopolymerization initiator, an acetophenone photopolymerization initiator, an α-ketol photopolymerization initiator, a photoactive oxime photopolymerization initiator, a benzoin photopolymerization initiator, or the like, A benzyl photopolymerization initiator, a diphenylketone photopolymerization initiator, a ketal photopolymerization initiator, and 9-oxosulfuric acid? A photopolymerization initiator, a mercaptophosphine oxide photopolymerization initiator, etc.

Specifically, the benzoin ether photopolymerization initiator may, for example, be benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether or benzoin isobutyl group. Ether, 2,2-dimethoxy-1,2-diphenylethane-1-one, anisole methyl ether, and the like.

The acetophenone-based photopolymerization initiator may, for example, be 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone or 1-hydroxycyclohexyl ketone, 4 -phenoxydichloroacetophenone, 4-tris-butyldichloroacetophenone, and the like.

The α-keto alcohol-based photopolymerization initiator may, for example, be 2-methyl-2-hydroxypropiophenone or 1-[4-(2-hydroxyethyl)phenyl]-2-hydroxy-2-methylpropane-1. - Ketone and the like.

The photoactive oxime-based photopolymerization initiator may, for example, be 1-phenyl-1,2-propanedione-2-(O-ethoxycarbonyl)-ruthenium or the like.

The benzoin-based photopolymerization initiator may, for example, be benzoin or the like.

The benzyl type photopolymerization initiator contains, for example, a benzyl group or the like.

The diphenyl ketone photopolymerization initiator contains, for example, diphenyl ketone, benzamidine benzoic acid, 3,3'-dimethyl-4-methoxydiphenyl ketone, polyvinyl diphenyl ketone, α - Hydroxycyclohexyl phenyl ketone and the like.

The ketal-based photopolymerization initiator contains benzyl dimethyl ketal or the like.

9-oxygen sulfur?? The photopolymerization initiator contains, for example, 9-oxygen sulfide? , 2-chloro 9-oxo sulfur?? , 2-methyl 9-oxo sulfur?? 2,4-dimethyl 9-oxo sulfur?? , isopropyl 9-oxo sulfur?? 2,4-dichloro 9-oxo-sulfur?? 2,4-diethyl 9-oxo-sulfur?? 2,4-diisopropyl 9-oxo-sulfur?? , dodecyl 9-oxo sulfur?? Wait.

The mercaptophosphine oxide photopolymerization initiator contains, for example, 2,4,6-trimethylbenzimidyl-diphenyl-phosphine oxide, bis(2,4,6-trimethylbenzylidene) - phenylphosphine oxide or the like.

The photopolymerization initiator (B) having an absorption band having a wavelength of 400 nm or less may be used singly or in combination of two or more kinds. The photopolymerization initiator (B) having an absorption band having a wavelength of 400 nm or less can be added in a range that does not impair the effects of the present invention, and is added in a single amount with respect to the formation of a (meth)acrylic polymer. The content of the monomer component is preferably from about 0.005 to about 0.5 part by weight, preferably from about 0.02 to about 0.1 part by weight.

In addition, when the ultraviolet absorber (or a dye compound) is contained in the pressure-sensitive adhesive layer, ultraviolet polymerization is carried out, and the ultraviolet curable acrylic pressure-sensitive adhesive composition is preferably formed by ultraviolet polymerization, and the ultraviolet-curable acrylic adhesive is formed. The composition contains a monomer component containing the alkyl (meth)acrylate and/or a partial polymer of the monomer component, an ultraviolet absorber (or a dye compound), and a photopolymerization initiator. The adhesive layer formed by ultraviolet-polymerizing the ultraviolet curable acrylic pressure-sensitive adhesive composition can form an object having a thickness of 150 μm or more, and can form an adhesive layer having a relatively wide thickness.

The photopolymerization initiator at this time is preferably a photopolymerization initiator (A) containing an absorption band having a wavelength of 400 nm or more. When the ultraviolet absorber is contained in the adhesive composition containing the ultraviolet absorber (or the dye compound), the ultraviolet rays may be absorbed by the ultraviolet absorber (or the dye compound) and may not be sufficiently polymerized. However, the photopolymerization initiator (A) having an absorption band having a wavelength of 400 nm or more is suitable because it can be sufficiently polymerized even if it contains an ultraviolet absorber (or a dye compound).

The photopolymerization initiator (A) having an absorption band having a wavelength of 400 nm or more can be bis(2,4,6-trimethylbenzylidene)-phenylphosphine oxide (Irgacure 819, manufactured by BASF), 2, 4 6-trimethylbenzimidyl-diphenyl-phosphine oxide (manufactured by LUCIRIN TPO, manufactured by BASF).

The photopolymerization initiator (A) having an absorption band having a wavelength of 400 nm or more may be used singly or in combination of two or more kinds.

Further, the amount of the photopolymerization initiator (A) having an absorption band having a wavelength of 400 nm or more is not particularly limited, but it is preferably less than the amount of addition of the ultraviolet absorber (or pigment compound) to the formation of (meth) The monofunctional monomer component of the acrylic polymer is preferably used in an amount of from 0.005 to 1 part by weight, preferably from 0.02 to 0.8 part by weight, per 100 parts by weight. When the amount of the photopolymerization initiator (A) to be added is within the above range, ultraviolet polymerization can be sufficiently carried out, which is preferable.

In addition, when the ultraviolet ray polymerization is carried out when the pressure-sensitive adhesive layer contains an ultraviolet absorber (or a dye compound), it is preferred to add a photopolymerization initiator (B) having an absorption band having a wavelength of 400 nm or less before the monomer component. The photopolymerization initiator (A) and the ultraviolet absorber (or pigment compound) having the absorption band having a wavelength of 400 nm or more are added to a partial polymer (prepolymer composition) of a partially polymerized monomer component by irradiation with ultraviolet rays. UV polymerization. When the photopolymerization initiator (A) having an absorption band having a wavelength of 400 nm or more is added to a part of the polymer (prepolymer composition) of the partially polymerized monomer component by ultraviolet irradiation, the photopolymerization initiator is preferably dissolved. Add to the monomer later.

(Cane Coupling Agent) Further, the adhesive composition of the present invention may contain a decane coupling agent. The blending amount of the decane coupling agent is preferably 1 part by weight or less, preferably 0.01 to 1 part by weight, and 0.02 to 0.6 part by weight, based on 100 parts by weight of the monofunctional monomer component forming the (meth)acrylic polymer. Better.

The aforementioned decane coupling agent may be exemplified by 3-glycidoxypropyltrimethoxy decane, 3-glycidoxypropyltriethoxy decane, 3-glycidoxypropylmethyldiethoxy decane. An epoxy group-containing decane coupling agent such as 2-(3,4 epoxycyclohexyl)ethyltrimethoxyoxane; 3-aminopropyltrimethoxy decane, N-2-(aminoethyl)-3-amine propyl Amino group such as methyl dimethyl dioxin, 3-triethoxy fluorenyl-N-(1,3-dimethylbutylidene) propylamine, N-phenyl-γ-aminopropyltrimethoxy decane a decane coupling agent; a (meth) acrylonitrile-based decane coupling agent such as 3-propenyloxypropyltrimethoxy decane or 3-methylpropenyloxypropyltriethoxy oxane; and 3-isocyanate C An isocyanate group-containing decane coupling agent such as triethoxyoxane.

(Crosslinking Agent) The adhesive composition of the present invention may contain a crosslinking agent. The crosslinking agent includes an isocyanate crosslinking agent, an epoxy crosslinking agent, a polyfluorene crosslinking agent, an oxazoline crosslinking agent, an anthracycline crosslinking agent, a decane crosslinking agent, and an alkyl ether. A crosslinking agent such as a melamine crosslinking agent, a metal chelate crosslinking agent, or a peroxide. The crosslinking agent may be used alone or in combination of two or more. Among these, an isocyanate crosslinking agent is also preferably used.

The above-mentioned crosslinking agent may be used singly or in combination of two or more kinds, and the total content is 5 parts by weight based on 100 parts by weight of the monofunctional monomer component forming the (meth)acrylic polymer. The remainder is preferably 0.01 to 5 parts by weight, more preferably 0.01 to 4 parts by weight, more preferably 0.02 to 3 parts by weight.

The isocyanate-based crosslinking agent is a compound having two or more isocyanate groups (including an isocyanate-regenerating functional group for temporarily protecting an isocyanate group such as a blocking agent or oligomerization) in one molecule. Examples of the isocyanate crosslinking agent include aromatic isocyanates such as methylphenyl diisocyanate and xylene diisocyanate; alicyclic isocyanates such as isophorone diisocyanate; and aliphatic isocyanates such as hexamethylene diisocyanate.

More specifically, lower aliphatic polyisocyanates such as butyl diisocyanate and hexamethylene diisocyanate; alicyclic isocyanates such as cyclopentyl diisocyanate, cyclohexyl diisocyanate, and isophorone diisocyanate; 2,4-methylphenylene diisocyanate, 4,4'-diphenylmethane diisocyanate, decyl diisocyanate, polymethylene polyphenyl isocyanate and other aromatic diisocyanates; trimethylolpropane / Methyl phenyl diisocyanate trimer adduct (trade name: Coronate L, manufactured by Nippon Polyurethane Industry Co., Ltd.), trimethylolpropane / hexamethylene diisocyanate trimer adduct (commodity) Isocyanate adducts such as Coronate HL, manufactured by Nippon Polyurethane Industry Co., Ltd.), a trimeric isocyanate of hexamethylene diisocyanate (trade name: Coronate HX, manufactured by Nippon Polyurethane Industry Co., Ltd.), Trimethylolpropane adduct of decyl diisocyanate (trade name: D110N, manufactured by Mitsui Chemicals Co., Ltd.), trimethylolpropane adduct of hexamethylene diisocyanate (trade name: D160N, Mitsui) Chemistry Polyether polyisocyanate, polyester polyisocyanate, and these additions to various polyol additions, trimer isocyanate linkages, biuret linkages, urea linkages, etc. Polyisocyanate, etc.

(Other Additives) In addition to the above components, the adhesive composition of the present invention may contain a suitable additive depending on the intended use. For example, an adhesive (for example, a rosin derivative resin, a polyfluorene resin, a petroleum resin, an oil-soluble phenol resin or the like which is solid, semi-solid or liquid in a normal temperature); a filler such as a hollow glass ball; and a plasticizer Agent; anti-aging agent; antioxidant and the like.

In the present invention, the pressure-sensitive adhesive composition is preferably adjusted to have a viscosity suitable for application to a substrate or the like. The viscosity adjustment of the adhesive composition can be carried out, for example, by adding various polymers such as a tackifier or a polyfunctional monomer, or by partially polymerizing a monomer component in the adhesive composition. The partial polymerization may be carried out before adding various polymers such as a tackifier or a polyfunctional monomer, or may be carried out after the addition. The viscosity of the above-mentioned adhesive composition changes depending on the amount of the additive, etc., so that when the monomer component in the adhesive composition is partially polymerized, the polymerization rate cannot be determined by a single meaning, but it is preferably 20% or less in terms of a standard. The degree is preferably about 3 to 20%, and about 5 to 15% is better. More than 20% viscosity will become too high to coat the substrate.

(Method of Forming Adhesive Layer) The method of forming the adhesive layer is not particularly limited, and it can be formed by a method generally employed in the art. Specifically, the adhesive composition may be applied to at least one side of the substrate, and the coating film formed of the adhesive composition may be dried or formed by irradiation with an active energy ray such as ultraviolet rays. Further, the adhesive layer formed on the substrate may be transferred to a polarizing film or the like.

The substrate is not particularly limited, and various substrates such as a release film and a transparent resin film substrate or a polarizing film described later are suitably used as the substrate.

The constituent material of the release film may be a resin film such as polyethylene, polypropylene, polyethylene terephthalate or polyester film, or a porous material such as paper, cloth or nonwoven fabric, a mesh or a foamed sheet. A suitable film material such as a metal foil or a laminate thereof is preferably a resin film from the viewpoint of excellent surface smoothness.

The resin film may, for example, be a polyethylene film, a polypropylene film, a polybutene film, a polybutadiene film, a polymethylpentene film, a polyvinyl chloride film, a vinyl chloride copolymer film, or polyethylene terephthalate. An ester film, a polybutylene terephthalate film, a polyurethane film, an ethylene-vinyl acetate film, or the like.

The thickness of the release film is usually 5 to 200 μm, preferably about 5 to 100 μm. The release film may be subjected to demolding and antifouling treatment by a polyfluorene-based, fluorine-based, long-chain alkyl or fatty acid amide-based release agent and cerium oxide powder, or may be applied. Antistatic treatment such as type, kneading type, and vapor deposition type. In particular, by appropriately performing a release treatment such as polyfluorination treatment, long-chain alkyl treatment, or fluorine treatment on the surface of the release film, the peeling property from the adhesive layer can be further improved.

The transparent resin film substrate is not particularly limited, and various resin films having transparency can be used. This resin film is formed of a single film. The material thereof may be a polyester resin such as polyethylene terephthalate or polyethylene naphthalate, an acetate resin, a polyether oxime resin, a polycarbonate resin, or a polyamide resin. Polyimine resin, polyolefin resin, (meth)acrylic resin, polyvinyl chloride resin, polydivinylidene resin, polystyrene resin, polyvinyl alcohol resin, polyarylate A resin, a polyphenylene sulfide resin, or the like. Among these, a polyester resin, a polyamidene resin, and a polyether oxime resin are preferable.

The thickness of the film substrate is preferably 15 to 200 μm, preferably 25 to 188 μm.

The method of applying the above adhesive composition to the above substrate may be a roll coating method, a kiss-roll coating method, a gravure coating method, a reverse coating method, a roll brush method, or a spray coating method. There are no known restrictions, such as a dip roll coating method, a bar coating method, a knife coating method, a pneumatic blade coating method, a curtain coating method, a lip coating method, and a known and suitable method using a die coater. .

When the coating layer is formed by drying the coating film formed of the above-mentioned adhesive composition, the drying conditions (temperature, time) are not particularly limited, and may be appropriately set according to the composition and concentration of the adhesive composition, for example, the temperature is 60 to 170 ° C and preferably 60 to 150 ° C, the time is 1 to 60 minutes and preferably 2 to 30 minutes.

The adhesive composition is an ultraviolet curable adhesive composition, and when the coating film formed of the ultraviolet curable adhesive composition is irradiated with ultraviolet rays to form the adhesive layer, the ultraviolet illuminance of the irradiation is preferably 5 mW/cm ^{2 .} the above. When the ultraviolet illuminance is less than 5 mW/cm ² , the polymerization reaction time may increase to deteriorate the productivity. Further, the ultraviolet illuminance is preferably 200 mW/cm ² or less. When the ultraviolet illuminance exceeds 200 mW/cm ² , the photopolymerization initiator is rapidly consumed to cause a low molecular weight of the polymer, and particularly, the holding power at a high temperature may be lowered. Further, the cumulative amount of ultraviolet light is preferably from 100 mJ/cm ² to 5000 mJ/cm ² .

The ultraviolet lamp used in the present invention is not particularly limited, but is preferably an LED lamp. The LED lamp is a lower-heating lamp than other ultraviolet lamps, so that the temperature of the adhesive layer in the polymerization can be suppressed. Therefore, it is possible to prevent the polymer from having a low molecular weight, to prevent a decrease in the cohesive force of the adhesive layer, and at the same time, to improve the holding force at a high temperature when the adhesive sheet is formed. In addition, a plurality of ultraviolet lamps can be combined. In addition, ultraviolet rays may be intermittently irradiated, and a dark period in which ultraviolet rays are irradiated and a dark period in which ultraviolet rays are not irradiated may be set.

In the present invention, the final polymerization rate of the monomer component in the ultraviolet curable adhesive composition is preferably 90% or more, more preferably 95% or more, and still more preferably 98% or more.

In the present invention, the ultraviolet peak wavelength of the ultraviolet curable adhesive composition is preferably in the range of 200 to 500 nm, and preferably in the range of 300 to 450 nm. When the ultraviolet peak wavelength exceeds 500 nm, the photopolymerization initiator may not decompose and may not initiate polymerization. Further, if the ultraviolet peak wavelength is less than 200 nm, the polymer chain may be cut to lower the subsequent characteristics.

Since the reaction is inhibited by oxygen in the air, it is preferable to form a release film or the like on the coating film formed of the ultraviolet curable acrylic pressure-sensitive adhesive composition for isolating oxygen, or to carry out photopolymerization under a nitrogen atmosphere. The release film can be exemplified by the above. Further, when a release film is used, the release film can be directly used as a separator of a polarizing film with an adhesive layer.

In addition, when the ultraviolet curable adhesive composition used in the present invention contains an ultraviolet absorber (or a dye compound), it is preferred to contain a monomer component containing an alkyl (meth)acrylate and the photopolymerization initiator (B). (sometimes also as a "pre-addition polymerization initiator"), a portion of the polymer of the monomer component is irradiated with ultraviolet rays, and a UV absorber (or a dye compound) is added to a part of the monomer component and has a wavelength. A photopolymerization initiator (A) (sometimes referred to as "post-addition polymerization initiator") in an absorption band of 400 nm or more is used to produce an ultraviolet curable adhesive composition. The polymerization rate of the partial polymer is preferably about 20% or less, preferably about 3 to 20%, and more preferably about 5 to 15%. The irradiation conditions of ultraviolet rays are as described above.

As described above, when the adhesive layer is formed of the ultraviolet curable adhesive composition containing the ultraviolet absorber (or the dye compound), the polymerization rate of the monomer component can be improved by the above-described two-stage polymerization, and the final adhesiveness can be improved. The UV absorption function of the agent layer.

The thickness of the adhesive layer is preferably 12 μm or more, more preferably 50 μm or more, still more preferably 100 μm or more, and particularly preferably 150 μm or more. The upper limit of the thickness of the adhesive layer is not particularly limited, and is preferably 1 mm or less. When the thickness of the adhesive layer exceeds 1 mm, the ultraviolet ray is not easily transmitted, and it is not only time-consuming to polymerize the monomer component, but also problems such as processability, winding in the step, and transportability may occur, and productivity is deteriorated, which is not preferable.

The gel fraction of the pressure-sensitive adhesive layer of the present invention is not particularly limited, and is preferably 35% or more, more preferably 50% or more, still more preferably 75% or more, and particularly preferably 85% or more. When the gel fraction of the adhesive layer is small, workability or handling may cause problems.

The haze value of the adhesive layer measured at a thickness of 25 μm is preferably 2% or less, preferably 0 to 1.5%, more preferably 0 to 1%. It is suitable that the haze layer has a high degree of transparency in the above range.

When the aforementioned adhesive layer is exposed, the adhesive layer can be protected by a release film before actual use is provided.

(3-2) Polarizing film The polarizing film may be one having a transparent protective film on at least one side of the polarizing member.

(3-2-1) Polarizer 4 The polarizer is not particularly limited, and various materials can be used. The polarizing material may be a dichroic property of adsorbing iodine or a dichroic dye on a hydrophilic polymer film such as a polyvinyl alcohol-based film, a partially formalized polyvinyl alcohol-based film, or an ethylene/vinyl acetate copolymer-based partially saponified film. The substance is uniaxially stretched, and a polyene-based alignment film such as a dehydrated material of polyvinyl alcohol or a dehydrochlorinated product of polyvinyl chloride is used. Among these, a polarizing member composed of a polyvinyl alcohol-based film and a dichroic material such as iodine is preferable. The thickness of the polarizers is not particularly limited and is generally about 5 to 80 μm.

A polarizing member which dyes a polyvinyl alcohol-based film with iodine and which is uniaxially stretched can be produced, for example, by immersing polyvinyl alcohol in an aqueous iodine solution, dyeing it, and extending it to 3 to 7 times its original length. It may be immersed in an aqueous solution such as potassium iodide which may contain boric acid, zinc sulfate, zinc chloride or the like according to the demand. Further, the polyvinyl alcohol-based film may be immersed in water and washed with water before dyeing. By washing the polyvinyl alcohol-based film with water, the dirt and the anti-adhesive agent on the surface of the polyvinyl alcohol-based film can be washed, and the polyvinyl alcohol-based film can be swollen to prevent unevenness such as stain spots. The extension can be carried out after dyeing with iodine, and can be extended while dyeing, or can be extended with iodine. The extension can also be carried out in an aqueous solution such as boric acid or potassium iodide or in a water bath.

Further, in the present invention, a thin polarizer having a thickness of 10 μm or less can also be used. From the viewpoint of thinning, the thickness is preferably 1 to 7 μm. Such a thin polarizer has a small thickness unevenness, a good visibility, and a small dimensional change, so that the durability is good, and the thickness of the polarizing film can be made thinner, which is suitable in all respects.

Examples of the thin polarizer include Japanese Patent Laid-Open No. 51-069644, Japanese Patent Laid-Open No. 2000-338329, International Publication No. 2010/100917, International Publication No. 2010/100917, and Patent No. 4,751,481. A thin polarizing film described in Japanese Laid-Open Patent Publication No. 2012-073563. These thin polarizing films can be obtained by a method comprising a step of stretching a polyvinyl alcohol-based resin (hereinafter also referred to as a PVA-based resin) layer and a resin substrate for stretching in a state of being laminated, and a dyeing step. In this production method, even if the PVA-based resin layer is thin, it can be extended by the support of the resin substrate for stretching, and there is no problem such as breakage due to stretching.

The thin polarizing film can be extended in a high-magnification manner and the polarizing performance can be improved in a method including a step of stretching in a state of laminating body and a dyeing step, and the thin polarizing film is described in, for example, International Publication No. 2010/100917 or Patent No. 4751481. In JP-A-2012-073563, it is preferable to prepare a method comprising the step of extending in an aqueous solution of boric acid, and it is described in Japanese Patent Laid-Open No. Hei. No. 2012-073563 It is preferred to prepare a method in which the step of assisting in the air extension is carried out before the extension in the aqueous solution of boric acid.

(3-2-2) Transparent Protective Film 3 The transparent protective film 3 used in the present invention is disposed on the side of the polarizing member 4, but a transparent protective film may be disposed on the organic EL panel side of the polarizing member 4.

As the transparent protective film, those conventionally used can be suitably used. Specifically, a transparent protective film formed of a material excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropic property, and the like is preferable, and examples thereof include polyethylene terephthalate and polyethylene naphthalate. a polyester-based polymer such as an ester, a cellulose-based polymer such as diethyl phthalocyanine or triethyl fluorene cellulose, an acrylic polymer such as polymethyl methacrylate, or a polystyrene or an acrylonitrile/styrene copolymer ( A styrene-based polymer such as AS resin) or a polycarbonate-based polymer. Further, examples of the polymer forming the transparent protective film include, for example, polyethylene, polypropylene, ring-based or polyolefin having a norbornene structure, polyolefin-based polymer of an ethylene/propylene copolymer, and vinyl chloride. A phthalamide-based polymer such as a polymer, a nylon or an aromatic polyamine, a quinone-based polymer, a fluorene-based polymer, a polyether fluorene-based polymer, a polyetheretherketone-based polymer, or a polyphenylene sulfide-based polymerization , vinyl alcohol polymer, vinylidene chloride polymer, vinyl butyral polymer, aryl ester polymer, polyoxymethylene polymer, epoxy polymer or the aforementioned polymer Mixture, etc. The transparent protective film may be formed into a resin-hardened layer of a thermosetting type or an ultraviolet curing type such as an acrylic type, an urethane type, an urethane urethane type, an epoxy type or a polyoxymethylene type.

The thickness of the transparent protective film can be appropriately determined, and is generally about 1 to 500 μm from the viewpoints of workability such as strength and handleability, and film properties.

The polarizer and the transparent protective film are preferably adhered to a water-based adhesive or the like. Examples of the aqueous binder include an isocyanate-based adhesive, a polyvinyl alcohol-based adhesive, a gelatin-based adhesive, a vinyl-based latex, an aqueous polyurethane, and an aqueous polyester. In addition to the above, examples of the adhesive for the polarizer and the transparent protective film include an ultraviolet curable adhesive, an electron beam curable adhesive, and the like. The adhesive for the electron beam curing type polarizing film can exhibit appropriate adhesion to the above various viewing side transparent protective films. Further, the adhesive used in the present invention may contain a metal compound filler.

The surface of the transparent protective film that is not attached to the polarizer may form a functional layer such as a hard coat layer, an anti-reflective layer or an anti-adhesive layer, or may be a processor that has been subjected to diffusion and anti-glare.

As the hard coat layer, a cured film made of a curable resin such as a melamine resin, an urethane resin, an alkyd resin, an acrylic resin or a polyoxyn resin is preferably used. The thickness of the aforementioned hard coat layer is preferably from 0.1 to 30 μm.

A UV absorber, a light stabilizer (HALS), an antioxidant or a pigment compound may also be added to the aforementioned functional layer.

(3-3) When the retardation film 5 has a refractive index nx in the slow axis direction, a refractive index ny in the fast axis direction in the plane, and a refractive index nz in the thickness direction, the retardation film satisfies nx=ny>nz, nx> Ny>nz, nx>ny=nz, nx>nz>ny, nz=nx>ny, nz>nx>ny, nz>nx=ny, can be used for various purposes. In addition, nx=ny is not only the case where nx and ny are exactly the same, but also includes cases where nx and ny are substantially the same. Moreover, ny=nz is not only the case where ny and nz are completely the same, but also the case where ny and nz are substantially the same.

In the present invention, in order to apply to the organic EL display device, the retardation film is preferably a quarter-wave plate having a front retardation of 1/4 wavelength (about 100 to 170 nm). It is preferable to laminate the polarizing film and the quarter-wavelength plate as a circularly polarizing film for antireflection of an organic EL display device.

That is, only the linearly polarized light component is transmitted through the polarized film through the external light incident on the organic EL display device. The linearly polarized light generally becomes elliptically polarized via the retardation film, and is particularly polarized when the phase difference plate is a quarter-wave plate and the angle formed by the polarization direction of the retardation film is π/4.

The circularly polarized light transmits the transparent substrate, the transparent electrode, and the organic thin film in the organic EL panel, and is then reflected by the metal electrode to transmit the organic thin film, the transparent electrode, and the transparent substrate again, and the retardation film again becomes linearly polarized. Further, since the linearly polarized light is orthogonal to the polarizing direction of the polarizing film, the polarizing plate cannot be transmitted. Thus, the mirror surface of the metal electrode can be completely shielded.

(3-4) Adhesive layer 6 The adhesive layer 6 (adhesive layer on the side of the organic EL panel) used in the present invention may be the same as the adhesive layer of the above-mentioned adhesive layer, and The (meth)acrylic polymer is preferably an acrylic adhesive layer formed of a (meth)acrylic adhesive composition of a base polymer. Further, the same can be cited as a method of producing the adhesive layer, a suitable aspect, and the like.

The thickness of the adhesive layer is not particularly limited, and is preferably about 10 to 75 μm, preferably about 12 to 50 μm.

(3-5) Other layer The above-mentioned (organic EL panel side) transparent protective film may be the same as the transparent protective film 3, and any of the adhesive layer and the adhesive layer in the present specification are also suitable as the aforementioned organic EL panel side. The first adhesive layer (or adhesive layer) is used.

(4) Transmittance of layer containing ultraviolet absorber The transmittance of the layer containing the ultraviolet absorber at a wavelength of 380 nm is preferably 9% or less, more preferably 7% or less, still more preferably 5% or less, and still more preferably 3% or less. When the transmittance at a wavelength of 380 nm is within the above range, the incident ultraviolet rays can be more highly blocked, so that deterioration of the organic EL element can be remarkably suppressed.

Further, the transmittance of the layer containing the ultraviolet absorber at a wavelength of 450 nm is preferably 60% or more, more preferably 70% or more, and more preferably 75% or more. When the transmittance at a wavelength of 450 nm is within the above range, the light emission of the organic EL element can be sufficiently transmitted, and sufficient display performance can be ensured in the organic EL display device.

(5) Transmittance of the layer containing the dye compound When the pressure-sensitive adhesive layer contains the dye compound, the transmittance at 400 nm is preferably 50% or less, more preferably 35% or less, and preferably 20% or less. When the transmittance at a wavelength of 400 nm is within the above range, the incident ultraviolet rays can be more highly blocked, so that deterioration of the organic EL element can be remarkably suppressed.

Further, the transmittance of the layer containing the dye-containing compound at a wavelength of 450 nm is preferably 60% or more, more preferably 70% or more, and more preferably 75% or more. When the transmittance at a wavelength of 450 nm is within the above range, the light emission of the organic EL element can be sufficiently transmitted, and sufficient display performance can be ensured in the organic EL display device.

(6) Transmittance of optical laminate The transmittance of the optical laminate at a wavelength of 380 nm is preferably 9% or less, preferably 7% or less, more preferably 5% or less, and particularly preferably 3% or less. When the transmittance at a wavelength of 380 nm is within the above range, the incident ultraviolet rays can be more highly blocked, and the deterioration of the organic EL element can be remarkably suppressed, which is preferable.

Further, the optical layered body preferably has a transmittance of 20% or less at a wavelength of 400 nm, preferably 15% or less, more preferably 10% or less. When the transmittance at a wavelength of 400 nm is within the above range, it is possible to more effectively block the incident ultraviolet rays and significantly suppress deterioration of the organic EL element.

Further, the optical layered body preferably has a transmittance of 25% or more at a wavelength of 450 nm, more preferably 30% or more, and more preferably 33% or more. When the transmittance at a wavelength of 450 nm is within the above range, the light emission of the organic EL element can be sufficiently transmitted, and sufficient display performance can be ensured in the organic EL display device.

(7) Organic EL display device The organic EL display device of the present invention contains the optical layered body 1 and the organic EL panel, and may contain other layers. Specifically, as shown in FIG. 2, the cover member 7 / the adhesive layer 2 / the protective film 3 / the polarizer 4 / the retardation film 5 / the adhesive layer 6 / the organic EL panel 8 are sequentially laminated from the viewing side. The organic EL display device 10 is preferably laminated, and the cover member 7/adhesive layer 2/(view side) protective film 3/polarizer 4/organic EL panel side protective film/organic EL panel side are sequentially laminated. 1 adhesive layer (or adhesive layer) / retardation film 5 / (organic EL panel side second) adhesive layer 6 / organic EL display device of organic EL panel 8, and the like. Further, a functional layer or a sensor layer such as a hard coat layer, an antiglare layer, or an antireflection layer, and a layer for laminating the adhesive layer or the adhesive layer may be included.

The cover member is not particularly limited, and those commonly used in the art can be suitably used, and examples thereof include a glass cover sheet, a plastic cover sheet, and the like. Further, the organic EL panel is not particularly limited, and a material commonly used in the art can be suitably used, and a panel having the following elements: a substrate, a plurality of organic EL elements arranged on the substrate, and the organic EL described above can be used. a protective layer on the element, and a sealing film provided on the protective layer. Example

Hereinafter, the present invention will be specifically described by examples, but the present invention is not limited by the examples. As for the weight and the percentage of each case, the weight basis.

Production Example 1 (Production of Acrylic Adhesive Composition (a)) 78 parts by weight of 2-ethylhexyl acrylate (2EHA), 18 parts by weight of N-vinyl-2-pyrrolidone (NVP), and 2-acrylic acid A monomer mixture composed of 15 parts by weight of hydroxyethyl ester (HEA) is blended with 1-hydroxycyclohexyl phenyl ketone as a photopolymerization initiator (trade name: IRGACURE 184, absorption band having a wavelength of 200 to 370 nm, manufactured by BASF Corporation) 0.035 parts by weight of 2,2-dimethoxy-1,2-diphenylethane-1-one (trade name: IRGACURE 651, absorption band having a wavelength of 200 to 380 nm, manufactured by BASF Corporation) of 0.035 parts by weight The ultraviolet ray was irradiated until the viscosity (measurement condition: BH viscosity meter No. 5 rotor, 10 rpm, measurement temperature: 30 ° C) was about 20 Pa·s, and a prepolymer composition in which one of the above monomer components was partially polymerized was obtained (polymerization ratio: 8) %). Next, 0.15 parts by weight of hexanediol diacrylate (HDDA) and 0.3 parts by weight of a decane coupling agent (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.) were added to the prepolymer composition to obtain an acrylic resin. Adhesive composition (a).

Production Example 2 (Production of Adhesive Layer (B1)) 95 parts by weight of butyl acrylate and 5 parts by weight of acrylic acid, and azo double as a polymerization initiator were placed in a separate flask equipped with a thermometer, a stirrer, a reflux cooling tube, and a nitrogen introduction tube. After 0.2 part by weight of isobutyronitrile and 233 parts by weight of ethyl acetate, nitrogen gas was poured in, and nitrogen substitution was carried out for about 1 hour while stirring. Thereafter, the flask was heated to 60 ° C and allowed to react for 7 hours to obtain an acrylic polymer having a weight average molecular weight (Mw) of 1.1 million. Addition of trimethylolpropane methyl phenyl diisocyanate (trade name: Coronate L, Nippon Polyurethane Industry) as an isocyanate crosslinking agent to the above acrylic polymer solution (100 parts by weight) An adhesive composition (solution) was prepared by using 0.1 part by weight of a decane coupling agent (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.). The obtained adhesive composition solution was applied to a separator having a thickness of 38 μm (polyethylene terephthalate film having a surface treated by peeling) to a thickness of 12 μm after drying, and then dried at 100 ° C. 3 The solvent was removed in minutes to obtain an adhesive layer. Thereafter, the mixture was heated at 50 ° C for 48 hours for crosslinking treatment. Hereinafter, the adhesive layer is referred to as "adhesive layer (B1)".

Production Example 3 (Production of Adhesive Layer (B1-1) Containing Pigment Compound) The above acrylic polymer solution (100 parts by weight of solid content) in Production Example 2 together with an isocyanate crosslinking agent and a decane coupling agent BONASORB UA3911 (trade name, lanthanide compound, "pigment compound (c1)" in Table 1), which is dissolved in toluene as a solid compound at a solid content of 1%, and a maximum absorption wavelength of the absorption spectrum: 398 nm, The half value width: 48 nm, manufactured by Orient Chemical Industries Co., Ltd., 1.5 parts by weight (solid content basis weight), and an adhesive composition (solution) was prepared. The obtained adhesive composition solution was applied to a separator having a thickness of 38 μm (a polyethylene terephthalate film having a surface-treated surface) to a thickness of 15 μm after drying, and then dried at 100 ° C. 3 The solvent was removed in minutes to obtain an adhesive layer. Thereafter, the mixture was heated at 50 ° C for 48 hours for crosslinking treatment. Hereinafter, the adhesive layer is referred to as "adhesive layer (B1-1)". The amount of the pigment compound added was 1.5% by weight based on the total weight (100% by weight) of the adhesive layer (B1-1).

Production Example 4 (Production of Adhesive Layer (B1-2) Containing Pigment Compound) Adhesion was formed in the same manner as in Production Example 3 except that the amount of the dye compound (c) was changed to 2.5 parts by weight (solid content). Agent layer. Hereinafter, the adhesive layer is referred to as "adhesive layer (B1-2)". The amount of the pigment compound added was 2.5% by weight based on the total weight (100% by weight) of the adhesive layer (B1-2).

Production Example 5 (Production of Adhesive Layer (B1-3) Containing Pigment Compound) In addition to changing the dye compound (c) to a cinnamic acid compound (trade name: SOM-5-0106, "Ultraviolet absorber" in Table 1 The adhesive layer was formed in the same manner as in Production Example 3 except that the maximum absorption wavelength of the absorption spectrum: 416 nm, half-value width: 50 nm, manufactured by Orient Chemical Industries Co., Ltd., was 1.0 part by weight. Hereinafter, the adhesive layer is referred to as "adhesive layer (B1-3)". The amount of the pigment compound added was 1.0% by weight based on the total weight (100% by weight) of the adhesive layer (B1-3).

Production Example 6 (Production of Adhesive Layer (B2)) Coating Example 2 was applied to a separator having a thickness of 38 μm (a polyethylene terephthalate film having a surface treated by a release treatment) so as to have a thickness of 23 μm after drying. After the obtained adhesive composition solution was obtained, it was dried at 100 ° C for 3 minutes to remove the solvent to obtain an adhesive layer. Thereafter, the mixture was heated at 50 ° C for 48 hours for crosslinking treatment. Hereinafter, the adhesive layer is referred to as "adhesive layer (B2)".

Production Example 7 (Production of Adhesive Layer (B2-1) Containing Pigment Compound) The acrylic polymer solution obtained in Production Example 2 (100 parts by weight of solid content) was added as a pigment compound to a solid content of 5%. The method is dissolved in toluene BONASORB UA3912 (trade name, lanthanide compound, "pigment compound (c2)" in Table 1, maximum absorption wavelength of absorption spectrum: 386 nm, half-value width: 53 nm, Orient Chemical Industries Co., Ltd.) 1.0 part by weight (solid content basis), trimethylolpropane methyl phenyl diisocyanate (trade name: manufactured by Coronate L, Nippon Polyurethane Industry) as an isocyanate crosslinking agent, 0.8 parts by weight, decane 0.1 parts by weight of a coupling agent (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.) was prepared to prepare an adhesive composition (solution). The above-mentioned adhesive composition solution was applied to a separator having a thickness of 38 μm (the surface of the release-treated polyethylene terephthalate film) to a thickness of 23 μm after drying, and then dried at 100 ° C. The solvent was removed in 3 minutes to obtain an adhesive layer. Thereafter, the mixture was heated at 50 ° C for 48 hours for crosslinking treatment. Hereinafter, the adhesive layer is referred to as "adhesive layer (B2-1)". The amount of the dye compound added was 1.0% by weight based on the total weight (100% by weight) of the adhesive layer (B2-1).

Production Example 8 (Preparation of Protective Film (C1)) 100 parts by weight of the oxime imidized MS resin described in Production Example 1 of JP-A-2010-284840, and 6,6',6''-(1,3) , 5-triterpene??-2,4,6-triyl) ginseng (3-hexyloxy-2-methylphenol) (trade name: LA-F70, "UV absorber (b1) in Table 1) The maximum absorption wavelength of the absorption spectrum: 357 nm (manufactured by Adeka) 0.65 parts by weight was mixed at 220 ° C in a biaxial kneader to prepare resin beads. The obtained resin beads were dried at 100.5 kPa and 100 ° C for 12 hours, and extruded from a T-die at a mold temperature of 270 ° C by a uniaxial extruder to form a film (thickness: 160 μm). Then, the film was stretched in a gas atmosphere of 150 ° C in a direction in which it was transported (thickness: 80 μm), and then extended in a direction perpendicular to the film transport direction in a gas atmosphere of 150 ° C to obtain a base having a thickness of 40 μm. Thin film A ((meth)acrylic resin film). The obtained base film A had a transmittance of 7% for light having a wavelength of 380 nm and a transmittance of 68% for light having a wavelength of 400 nm.

For UV curable type containing 13 parts of isomeric cyanuric acid triacrylate, 16 parts of pentaerythritol triacrylate, 62 parts of dipentaerythritol hexaacrylate and 9 parts of isophorone diisocyanate polyurethane 2,4-bis-[{4-(4-ethylhexyloxy) in 100 parts of resin (trade name: UNIDIC 17-806, solid content: 80%, solvent: butyl acetate, DIC) (4-hydroxy}-phenyl]-6-(4-methoxyphenyl)-1,3,5-triterpene? (trade name: Tinosorb S, "Ultraviolet absorber (b2) in Table 1 ), the maximum absorption wavelength of the absorption spectrum: 346 nm, manufactured by BASF Japan Co., Ltd.), 1.5 parts by weight, and a leveling agent (trade name: GRANDIC PC-4100, manufactured by DIC Co., Ltd.), 5 parts, as photopolymerization Bis(2,4,6-trimethylbenzylidene)-phenylphosphine oxide (trade name: IRGACURE 819, absorption band having a wavelength of 200 to 450 nm, manufactured by BASF Japan Co., Ltd.) After 3 parts by weight, the mixture was diluted with methyl isobutyl ketone so that the solid content concentration was 50%, and a composition for forming a hard coat layer was prepared. After the coating composition for forming a hard coat layer was applied onto the obtained base film A to form a coating layer, the coating layer was heated at 120 ° C for 1 minute. The coated coating layer after heating was irradiated with ultraviolet rays having a cumulative light amount of 500 mJ/cm ² with a high pressure mercury lamp to cure the coating layer to form a 7 μm hard coat layer. Hereinafter, the protective film layer with the surface treatment layer is referred to as "protective film layer (C1)". The amount of the ultraviolet absorber added was 0.77% by weight based on the total weight (100% by weight) of the protective film (C1).

Production Example 9 (Preparation of a protective film (C2-1)) 100 parts by weight of the ruthenium iodide resin described in Production Example 1 of JP-A-2010-284840 was dissolved in dichloromethane to prepare 12% by weight. Blending the solution. Adding cinnamic acid-based compound (trade name: SOM-5-0106, "ultraviolet absorber (c3)" in Table 1, maximum absorption wavelength of absorption spectrum: 416 nm, half-value width: 50 nm, Orient Chemical Industries Co., Ltd After 0.3 parts by weight, the above-mentioned adhesive composition solution was applied to a glass plate which had been subjected to release treatment so as to have a thickness of 40 μm after drying, and dried at 100 ° C for 3 minutes to remove the solvent to obtain a thick layer. 40 μm protective film (C2-1). The obtained protective film (C2-1) had a transmittance of 14% for light having a wavelength of 380 nm and a transmittance of 2.6% for light having a wavelength of 400 nm. The amount of the dye compound added was 0.3% by weight based on the total weight (100% by weight) of the protective film (C2-1).

Production Example 10 (Preparation of Protective Film (C2-2)) In addition to using 1.3 parts by weight of BONASORB UA3912 (product name, lanthanide compound, "Pigment Compound (c2)" in Table 1, absorption) as the pigment compound (c) A protective film (C2-2) was obtained in the same manner as in Production Example 9 except that the maximum absorption wavelength of the spectrum was 386 nm, a half value width: 53 nm, manufactured by Orient Chemical Industries Co., Ltd. The obtained protective film (C2-2) had a transmittance of 0.3% for light having a wavelength of 380 nm and a transmittance of 0.8% for light having a wavelength of 400 nm. The amount of the pigment compound added was 1.3% by weight based on the total weight (100% by weight) of the protective film (C2-2).

Example 1 (Production of the adhesive composition (A1)) The acrylic pressure-sensitive adhesive composition (a) obtained in Production Example 1 (100 parts by weight of the monomer component forming the acrylic polymer) was added in an amount of 15% by solid content. 2,4-bis-[{4-(4-ethylhexyloxy)-4-hydroxy}-phenyl]-6-(4-methoxyphenyl)-1 dissolved in butyl acrylate , 3,5-三吖?? (trade name: Tinosorb S, "ultraviolet absorber b2" in Table 1, maximum absorption wavelength of absorption spectrum: 346 nm, manufactured by BASF Japan Co., Ltd.) 1.4 parts by weight (solid Component weight) and bis(2,4,6-trimethylbenzylidene)-phenylphosphine oxide (trade name: IRGACURE 819, absorption band with wavelength of 200-450 nm, BASF Japan Co., Ltd. 0.2 parts by weight and then stirred to obtain an adhesive composition (A1).

(Production of Adhesive Layer (A1)) The adhesive composition (A1) was applied to a film which had been subjected to peeling off the release film after the thickness of the adhesive layer was 150 μm, and then the release film was attached. The surface of the adhesive composition layer is bonded. Thereafter, ultraviolet rays were irradiated under the conditions of illuminance: 6.5 mW/cm ² , light amount: 1500 mJ/cm ² , and peak wavelength: 350 nm, and the adhesive composition layer was photocured to form an adhesive layer (A1). The amount of the ultraviolet absorber added was 1.4% by weight based on the total weight (100% by weight) of the adhesive layer (A1).

(Production of polarizing film (P1)) A cycloolefin polymer film having a thickness of 25 μm was bonded to the side of the polarizing member made of a stretched polyvinyl alcohol film having an iodine thickness of 5 μm, and a polyvinyl alcohol-based adhesive was applied thereto. An acrylic film having a thickness of 20 μm was laminated on the side of the organic EL panel of the polarizer using a polyvinyl alcohol-based adhesive to form a polarizing film (P1). The unit transmittance of the polarizing film was 42.4%, and the degree of polarization was 99.995.

(Production of Polarizing Film with Adhesive Layer) The adhesive layer (A1) was laminated on the side of the polarizing film (P1) (i.e., the surface of the cycloolefin polymer film having a thickness of 25 μm). The adhesive layer (B1-1) obtained in Production Example 3 was laminated on the side surface of the organic EL panel of the polarizing film (P) (that is, the surface of the acrylic film having a thickness of 20 μm), and a retardation film (thickness: 56 μm, material: Polycarbonate) and the adhesive layer (B2-1) obtained in Production Example 7 form a polarizing film with an adhesive layer. The obtained polarizing film with an adhesive layer has an adhesive layer (A1)/cycloolefin polymer film/polarizer/acrylic film/adhesive layer (B1-1)/phase difference film/adhesive layer (B2-1) The composition.

Example 2 (Production of Adhesive Composition (A2)) To the acrylic adhesive composition (a) obtained in Production Example 1, 2-(2H-benzotriazol-2-yl)-6-(1-A was added. Base-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol (trade name: TINUVIN 928, "UV absorber b3" in Table 1, the largest absorption spectrum Absorption wavelength: 349 nm, manufactured by BASF Japan Co., Ltd.) 1.5 parts by weight (solid content basis weight) and bis(2,4,6-trimethylbenzylidene)-phenylphosphine oxide (trade name: IRGACURE 819) 0.2 parts by weight of an absorption band having a wavelength of 200 to 450 nm and manufactured by BASF Japan Co., Ltd. was stirred to obtain an adhesive composition (A2).

(Manufacture of Adhesive Layer (A2)) The adhesive composition (A2) obtained as described above was applied to a film having been subjected to peeling off the release film by a thickness of 150 μm after the formation of the adhesive layer, followed by release film. It is attached to the surface of the adhesive composition layer. Thereafter, ultraviolet rays were irradiated under the conditions of illuminance: 6.5 mW/cm ² , light amount: 1500 mJ/cm ² , and peak wavelength: 350 nm, and the adhesive composition layer was photocured to form an adhesive layer (A2). The amount of the ultraviolet absorber added was 1.5% by weight based on the total weight (100% by weight) of the adhesive layer (A2).

(Production of polarizing film (P2)) A cycloolefin polymer film having a thickness of 25 μm was bonded to the side of the polarizing member made of a stretched polyvinyl alcohol film having an iodine thickness of 5 μm, and a polyvinyl alcohol-based adhesive was applied thereto. The protective film (C2-1) obtained in Production Example 9 was laminated on the side of the organic EL panel of the polarizer using a polyvinyl alcohol-based adhesive to form a polarizing film (P2). The unit transmittance of the polarizing film was 42.5%, and the degree of polarization was 99.995.

(Production of Polarizing Film with Adhesive Layer) An adhesive layer (A2) obtained by laminating the viewing side of the polarizing film (P2) (i.e., the surface of a cycloolefin polymer film having a thickness of 25 μm) was laminated. The adhesive layer (B1) obtained in Production Example 2 was laminated on the side surface of the organic EL panel of the polarizing film (P) (i.e., the surface of the protective film (C2-1)), and a retardation film was laminated (thickness: 56 μm, material: poly The carbonate layer and the adhesive layer (B2) obtained in Production Example 6 form a polarizing film with an adhesive layer. The obtained polarizing film with an adhesive layer has an adhesive layer (A2)/cycloolefin polymer film/polarizer/protective film (C2-1)/adhesive layer (B1)/phase difference film/adhesive layer (B2) The composition.

Example 3 (Production of Adhesive Composition (A3)) The acrylic adhesive composition (a) obtained in Production Example 1 was added to 2,4-bis-[ which is dissolved in butyl acrylate in a solid content of 15%. {4-(4-Ethylhexyloxy)-4-hydroxy}-phenyl]-6-(4-methoxyphenyl)-1,3,5-triterpene? (trade name: Tinosorb S, "Ultraviolet absorber b2" in Table 1, maximum absorption wavelength of absorption spectrum: 346 nm, manufactured by BASF Japan Co., Ltd.) 0.7 parts by weight (solid content basis weight) and bis(2,4,6-trimethylbenzene) 0.2 parts by weight of a fluorenylphosphonium oxide (trade name: IRGACURE 819, an absorption band having a wavelength of 200 to 450 nm, manufactured by BASF Japan Co., Ltd.), followed by stirring to obtain an adhesive composition (A3) ).

(Production of Adhesive Layer (A3)) The adhesive composition (A3) was applied to a film which had been subjected to peeling off the release film after the thickness of the adhesive layer was 150 μm, and then the release film was attached. The surface of the adhesive composition layer is bonded. Thereafter, ultraviolet rays were irradiated under the conditions of illuminance: 6.5 mW/cm ² , light amount: 1500 mJ/cm ² , and peak wavelength: 350 nm, and the adhesive composition layer was photocured to form an adhesive layer (A3). The amount of the ultraviolet absorber added was 0.7% by weight based on the total weight (100% by weight) of the adhesive layer (A3).

(Production of polarizing film (P3)) On the side of the polarizing member made of a stretched polyvinyl alcohol film having an iodine thickness of 5 μm, a polyvinyl alcohol-based adhesive was used to connect the polarizing member to the substrate film A side. The protective film (C1) obtained in the production example 8 was bonded to the organic EL panel side surface of the polarizer, and the organic EL side protective film (C2-2) obtained in the production example 10 of the polyvinyl alcohol-based adhesive layer was used to form a polarized light. Film (P3). The unit transmittance of the polarizing film was 42.4%, and the degree of polarization was 99.995.

(Production of Polarizing Film with Adhesive Layer) The adhesive layer (A3) obtained by laminating the viewing side of the polarizing film (P3) (i.e., the surface of the protective film (C1)). The adhesive layer (B1-2) obtained in Production Example 4 was laminated on the side surface of the organic EL panel of the polarizing film (P) (i.e., the surface of the protective film (C2-2)), and a retardation film (thickness: 56 μm, material) was laminated. : Polycarbonate) and the adhesive layer (B2) obtained in Production Example 6 to form a polarizing film with an adhesive layer. The obtained polarizing film with an adhesive layer has an adhesive layer (A3) / a protective film (C1) / a polarizing member / a protective film (C2-2) / an adhesive layer (B1-2) / a retardation film / an organic EL display panel The composition of the side adhesive layer (B2).

Comparative Example 1 The adhesive layer (A3) obtained in Example 3 was laminated on the side of the polarizing film (P1) obtained in Example 1 (i.e., the surface of a cycloolefin polymer film having a thickness of 25 μm). The adhesive layer (B1) obtained in Production Example 2 was laminated on the side surface of the organic EL panel of the polarizing film (P) (that is, the surface of the acrylic film having a thickness of 20 μm), and a retardation film (thickness: 56 μm, material: polycarbonate) was laminated. The adhesive layer (B2) obtained in Production Example 6 was formed into a polarizing film with an adhesive layer. The obtained polarizing film with an adhesive layer has an adhesive layer (A3)/cycloolefin polymer film/polarizing member/acrylic film/adhesive layer (B1)/phase difference film/organic EL display panel side adhesive layer (B2) The composition of).

Comparative Example 2 (Production of Adhesive Layer) An adhesive composition was obtained in the same manner as in Example 1 except that the ultraviolet absorber (b2) in the production of the adhesive composition (A1) of Example 1 was not contained. A4). Further, an adhesive layer (A4) having a thickness of 150 μm was formed in the same manner as in Example 1 except that the above-described adhesive composition (A4) was used in the production of the pressure-sensitive adhesive layer (A1).

(Production of Polarizing Film with Adhesive Layer) The above-mentioned adhesive layer (A4) was laminated on the side of the polarizing film (P1) obtained in Example 1 (i.e., the surface of a cycloolefin polymer film having a thickness of 25 μm). The adhesive layer (B1-3) obtained in Production Example 5 was laminated on the side surface of the organic EL panel of the polarizing film (P) (that is, the surface of the acrylic film having a thickness of 20 μm), and a retardation film (thickness: 56 μm, material: The polycarbonate layer and the adhesive layer (B2) obtained in Production Example 6 were formed into a polarizing film with an adhesive layer. The obtained polarizing film with an adhesive layer has an adhesive layer (A4)/cycloolefin polymer film/polarizer/acrylic film/adhesive layer (B1-3)/phase difference film/adhesive layer (B2). .

The following evaluations were performed on the obtained layers and the optical laminate (polarized film with an adhesive layer).

<Measurement of Transmittance of Layer Containing Ultraviolet Absorber> The release film of the layer (adhesive layer) containing the ultraviolet absorber obtained in the examples and the comparative examples was peeled off and attached to a measuring jig, and a spectrophotometer (product) Name: U4100, manufactured by Hitachi High-Technologies Corporation). The transmittance is a transmittance measured in the range of 350 nm to 780 nm. Further, in the case of the protective film containing the ultraviolet absorber of Example 3, the transmittance was measured in the same manner as the adhesive layer except that the permeable film holder was attached to the measuring jig.

<Measurement of Transmittance of Layer Containing Pigment Absorber> The release film of the layer (adhesive layer) containing the dye-absorbing agent obtained in the examples and the comparative examples was peeled off and attached to a measuring jig, and a spectrophotometer (product) Name: U4100, manufactured by Hitachi High-Technologies Corporation). The transmittance is a transmittance measured in the range of 350 nm to 780 nm. Further, in the case of the protective film containing the dye compound of Examples 2 and 3, the transmittance was measured in the same manner as the adhesive layer except that the permeable film material clip was attached to the measuring jig.

(Measurement of Transmittance of Polarizing Film with Adhesive Layer) The release film of the polarizing film with the adhesive layer obtained in the examples and the comparative examples was peeled off and attached to a measuring jig, and a spectrophotometer (product name: U4100) The measurement was carried out by Hitachi High-Technologies Corporation. The transmittance is a transmittance measured in the range of 350 nm to 780 nm.

[Table 1]

1‧‧‧Optical laminate
2‧‧‧ adhesive layer
3‧‧‧Transparent protective film
4‧‧‧ polarizer
5‧‧‧ phase difference film
6‧‧‧Adhesive layer
7‧‧‧ Covering components
8‧‧‧Organic EL panel
10‧‧‧Organic EL display device

Fig. 1 is a cross-sectional view schematically showing an embodiment of an optical layered body used in the present invention. Fig. 2 is a cross-sectional view schematically showing an embodiment of an organic EL display device of the present invention.

1‧‧‧Optical laminate

2‧‧‧ adhesive layer

3‧‧‧Transparent protective film

4‧‧‧ polarizer

5‧‧‧ phase difference film

6‧‧‧Adhesive layer

Claims (5)

An organic EL display device comprising an optical layered body and an organic EL panel, wherein the optical layered body comprises a polarizer, a retardation film, and at least one layer other than the layers; and the layers constituting the optical layered body are doped The ultraviolet absorber and the pigment compound are combined, and the maximum absorption wavelength of the absorption spectrum of the pigment compound exists in a wavelength region of 380 to 430 nm; and the layer having the ultraviolet absorber is present on the side of the spectrum which is larger than the layer having the pigment compound. The organic EL display device according to claim 1, wherein the optical layered body contains at least an adhesive layer, a transparent protective film, a polarizing member, a retardation film, and an adhesive layer from the viewing side, and the ultraviolet absorber is blended. In the layer which is closer to the viewing side than the polarizing member, the dye compound is blended in the layer on the side of the organic EL panel than the polarizing member. The organic EL display device of claim 2, wherein the ultraviolet absorber is blended in at least one layer selected from the group consisting of the adhesive layer, the transparent protective film, and the retardation film, the coloring matter The compound is blended into the aforementioned adhesive layer. The organic EL display device according to any one of claims 1 to 3, wherein the dye compound is an organic dye compound. The organic EL display device according to any one of claims 1 to 4, wherein a maximum absorption wavelength of an absorption spectrum of the ultraviolet absorber is present in a wavelength region of 300 to 400 nm.