JP2007284516A - Ultraviolet shielding resin composition and use thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultraviolet shielding resin composition which excels in transparency without discoloration and also can sufficiently shield ultraviolet rays in the entire wavelength region of 290-420 nm, and also excels in the heat and wet heat durability of the ultraviolet shielding performance, and can form a pressure-sensitive adhesive layer and a coated film excellent in the heat and wet heat durability of affixation performance or the coated film surface state and adhesion as well. <P>SOLUTION: The ultraviolet shielding resin composition comprises an acrylic copolymer (A) having a hydroxyl group and/or a carboxylic acid (anhydride) group, a reactive compound (B) capable of reacting with at least any one of the hydroxyl group and the carboxylic acid (anhydride) group, at least any one of a pyrrolidine-amide based ultraviolet absorber (c1) and a xanthone based ultraviolet absorber (c2), and an ultraviolet absorber (c3) capable of absorbing ultraviolet rays having a wavelength of 380 nm or less, and furthermore at least any one of an antioxidant (d1) and a light stabilizer (d2). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to an ultraviolet blocking resin composition that is excellent in shielding performance of light having a wavelength of 420 nm or less among ultraviolet rays. Specifically, the present invention relates to an ultraviolet light shielding resin composition suitable for imparting an ultraviolet light shielding function to the surface of a glass member for organic electroluminescence (hereinafter, “electroluminescence” is abbreviated as “EL”). The glass member for an EL element having an ultraviolet blocking function on the surface can protect the EL element from external ultraviolet rays, improve visibility in a bright place, and prevent deterioration of the EL element.
The present invention is also a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer having excellent transparency as a constituent layer, and the pressure-sensitive adhesive sheet adheres to the adherend even if it is exposed to high temperature or high temperature and high humidity after being attached to the adherend. Further, the present invention also relates to an ultraviolet blocking adhesive and an adhesive sheet suitable for forming an ultraviolet blocking adhesive sheet that does not float or peel off from the surface and does not deteriorate the ultraviolet blocking performance even when exposed to high temperature or high temperature and high humidity.

Conventionally, EL elements are self-luminous and have high visibility and are completely solid elements, so that they have excellent impact resistance and are easy to handle, so they are used as light emitting elements in various display devices. Is attracting attention.
The general structure and light emission principle of an EL element will be briefly described. The EL element is composed of a light emitting layer and a pair of counter electrodes sandwiching the layer. When an electric field is applied between both electrodes, electrons are injected from the cathode side and holes are injected from the anode side. Then, the electrons recombine with holes in the light emitting layer, and the energy released when the energy level returns from the conduction band to the valence band is converted into light.

The EL element includes an inorganic EL element using an inorganic substance as a light emitting material and an organic EL element using an organic substance.
Among these, since the applied voltage of the organic EL element can be significantly lowered, the use as a solid light emitting type inexpensive large-area full-color display element is promising, and not only a single color but also red, green, and blue 3 Many practical researches, such as arranging primary colors and white colors, are being actively conducted.

  However, in the organic EL element up to now, the light emitting layer is excited by light from the outside, for example, lighting such as a fluorescent lamp or sunlight, when not lighting, that is, when an electric field is not applied between both electrodes. End up. As a result, in a bright place, it becomes difficult to determine whether or not the light emitting element is lit (decrease in visibility), and the ratio of brightness between lighting and non-lighting (contrast) is lower than in a dark place. That is, the conventional organic EL element cannot ensure the same display quality in a bright place and a dark place.

  Furthermore, the organic EL element has a problem of being easily deteriorated by ultraviolet rays from the outside (hereinafter sometimes abbreviated as “UV”), particularly invisible ultraviolet rays having a wavelength of 290 nm to 420 nm contained in sunlight. When the organic EL device is exposed to the UV for a long time, the light emitting material in the light emitting layer and the organic material in the hole injecting layer and the hole transporting layer are deteriorated, causing light emission fading and light emission luminance reduction. . This phenomenon has a problem that when it is exposed to natural light for a long period of time, a predetermined luminance and emission color cannot be obtained, and there is a great problem that stability during repeated use is inferior.

In addition, a light-emitting diode (hereinafter abbreviated as “LED”), which is a kind of inorganic EL, has low power consumption, good visibility, and a long life, and has been steadily developed since it was invented as an alternative to incandescent lamps. It has become widespread. In addition, a blue light-emitting diode, one of the three primary colors of light, was invented, and a white light-emitting diode was also invented in recent years, which has spurred many applications such as outdoor displays, traffic signals, and liquid crystal display (LCD) backlights. Yes.
The color of the emitted light is largely determined by the material used. The light emitting materials used are InGaN and ZnCdSe for blue, ZnTeSe and GaP for green, InGaN for red, AlGaAs and GaPZn for red, GaAsSi and InGaAsP for infrared, and the like, which are used according to applications.
LEDs are often used outdoors and are often exposed to sunlight. The invisible ultraviolet rays having a wavelength of 290 nm to 420 nm contained in sunlight have a problem that the material constituting the LED is likely to be deteriorated and the luminance is likely to be lowered.

That is, in order to improve the practicality of organic EL elements and LEDs, it is necessary to shield ultraviolet rays having a wavelength of 420 nm or less and protect the organic EL elements and LEDs from such ultraviolet rays.
Various UV absorbers and various combinations have been proposed in various documents.

  For example, Patent Documents 1 to 4 disclose benzotriazole-based ultraviolet absorbers. However, benzotriazole ultraviolet absorbers generally have poor solubility.

Patent Documents 5 to 8 disclose diphenylmethane-based ultraviolet absorbers.
Patent Documents 9 to 10 disclose triazine-based ultraviolet absorbers.
Patent Document 11 discloses a benzoxazine-based ultraviolet absorber.
Patent Documents 12 to 16 describe that a compound having a nitrogen-containing five-membered ring structure used for a silver halide photographic light-sensitive material has an ultraviolet absorbing function.

  However, although the conventional ultraviolet absorbers described in Patent Documents 1 to 11 can block ultraviolet rays having a wavelength of 380 nm or less, the ultraviolet blocking ability on the longer wavelength side is insufficient.

By the way, in order to protect organic EL elements and LEDs from ultraviolet rays having a wavelength of 290 nm to 420 nm, a plastic film or the like is adhered to an organic EL glass member or an LED glass member using an adhesive having an ultraviolet blocking ability. (Refer to FIG. 1 or 2), or a method of coating a coating material having an ultraviolet blocking ability on a glass member for organic EL or a glass member for LED.
A pressure-sensitive adhesive or paint having an ultraviolet blocking ability is required to be less colored and excellent in transparency.

In addition, organic EL elements and LED elements are expected to be used in various situations. Therefore, various acceleration tests that impose severe temperatures and humidity are imposed on organic EL elements and LED elements. Similarly, a high degree of durability is required for adhesives and paints for protecting organic EL elements and LED elements from ultraviolet rays.
For example, in the case of a pressure-sensitive adhesive having an ultraviolet blocking ability, after a plastic film or the like provided with a pressure-sensitive adhesive layer is attached to an adherend, for a long time (for example, at an environment of 120 ° C.) for a long time (for example, 1000 hours). ) Even if left for a long time (for example, 1000 hours) under high temperature and high humidity (for example, in an environment of 80 ° C. and 90% relative humidity), the plastic film or the like can be used as a glass member or LED for organic EL. It is required that the glass member does not float or peel off from the glass member (sticking performance against heat resistance and resistance to moisture heat).
In the case of a paint having an ultraviolet blocking ability, it is required that the coating film is not cracked or wrinkled even when exposed to the above-mentioned environment, and that the coating film is sufficiently adhered to the adherend. (Film surface state and adhesion resistance against heat and moisture resistance)

  Furthermore, UV-blocking adhesives and paints have no change in UV-blocking performance even when exposed to the above environment compared to their exposure (UV-blocking performance against heat durability) And durability against moisture and heat).

Compounds having a nitrogen-containing five-membered ring structure disclosed in Patent Documents 12 to 15 have a relatively long wavelength region of ultraviolet absorption ability.
However, these compounds are vulnerable to heat and easily decompose when exposed to the above-described environment. Therefore, a pressure-sensitive adhesive layer or a coating film formed from a pressure-sensitive adhesive or paint containing these compounds is difficult in terms of heat resistance and moisture heat resistance. Moreover, if the ultraviolet absorber is decomposed, the ultraviolet blocking performance is also lowered.

In other words, the conventional ultraviolet absorber is not colored, has excellent transparency, sufficiently shields ultraviolet rays in the entire range of 290 nm to 420 nm, and has an ultraviolet blocking performance against heat and moisture heat durability. Forms a pressure-sensitive adhesive layer and a coating film that are excellent in heat resistance and heat resistance against moisture and heat resistance of the coating performance, or excellent in heat resistance and heat resistance against adhesion and heat resistance. I couldn't.
JP 2002-53824 A JP 2002-543266 Gazette JP 2003-113317 A Special table 2004-182822 gazette JP-A-9-115668 Japanese Patent Laid-Open No. 9-325333 JP 2004-102223 A Japanese Patent Laid-Open No. 9-325333 Japanese Patent Laid-Open No. 10-17557 JP 2002-543265 Gazette JP-A-8-234352 JP-A 63-53543 JP-A-9-115668 JP-A-6-337492 JP-A-7-114126

  The present invention is an ultraviolet blocking resin composition that is not colored, has excellent transparency, and can sufficiently block ultraviolet rays in the entire wavelength range of 290 nm to 420 nm, and has the ultraviolet blocking performance against heat and moisture resistance. An object of the present invention is to provide a UV-blocking resin composition capable of forming an adhesive layer and a coating film that are excellent in adhesion performance, coating film surface state and adhesion and heat resistance and moisture heat resistance. To do.

  That is, in the first invention, a hydroxyl group and / or (anhydrous) carboxylic acid group ["an carboxylic acid group" and "carboxylic acid group" are collectively referred to as "(anhydrous) carboxylic acid group". The same applies below. ] A reactive compound (B) capable of reacting with at least one of a hydroxyl group and a (anhydrous) carboxylic acid group, a pyrrolidine-amide ultraviolet absorber (c1) or a xanthone ultraviolet absorber Containing at least one of the agent (c2) and an ultraviolet absorber other than the ultraviolet absorbers (c1) and (c2), which can absorb ultraviolet rays having a wavelength of 380 nm or less, (c3), Furthermore, it is related with the ultraviolet-blocking resin composition characterized by including at least any one of antioxidant (d1) or a light stabilizer (d2).

  According to a second aspect of the invention, the pyrrolidine-amide type ultraviolet absorber (c1) is a compound represented by the following general formula (I) or (II): The present invention relates to a functional resin composition.

[In General Formulas (I) and (II), R _{1 to} R ₂ are each independently H, OH group, alkylamino group, acylamino group, arylamino group, halogen, cyano group, or C1-C26. It is any one selected from linear, branched or alicyclic hydrocarbon groups and polyoxyalkylene groups having 2 to 3 carbon atoms, and R ₁ is a cyclic hydrocarbon which may contain a hetero atom. It may be a group. ]

  The third invention is the first or second invention, wherein the xanthone-based ultraviolet absorber (c2) is a compound represented by any one of the following general formulas (III) to (V): The present invention relates to the ultraviolet ray shielding resin composition described.

[In General Formulas (III) to (V), R _{3 to} R ₁₁ are each independently H, OH group, alkylamino group, acylamino group, arylamino group, halogen, cyano group, or C1 to C26. It is any one selected from a linear, branched or alicyclic hydrocarbon group and a polyoxyalkylene group having 2 to 3 carbon atoms, and R ₁₁ is a cyclic hydrocarbon group which may contain a hetero atom. There may be. ]

  According to a fourth aspect of the present invention, the antioxidant (d1) is any one of a phenol-based compound, a phosphorus-based compound, and a sulfur-based compound. The present invention relates to a resin composition.

  The fifth invention relates to the ultraviolet light blocking resin composition according to any one of the first to fourth inventions, wherein the light stabilizer (d2) is a hindered amine compound.

  Moreover, 6th invention is 0.001-10 weight part of pyrrolidine-amide type | system | group ultraviolet absorbers (c1) and / or a xanthone type ultraviolet absorber (100 weight part with respect to 100 weight part of acrylic copolymers (A). The ultraviolet blocker according to any one of the first to fifth inventions, which contains 0.001 to 10 parts by weight of c2) and 0.001 to 10 parts by weight of other ultraviolet absorber (c3). The present invention relates to a functional resin composition.

  Moreover, 7th invention contains 0.01-20 weight part of reactive compounds (B) with respect to 100 weight part of acrylic copolymers (A), Any 1st thru | or 6th characterized by the above-mentioned. The present invention relates to an ultraviolet blocking resin composition described in the invention.

  Moreover, 8th invention contains 0.001-10 weight part of at least any one of antioxidant (d1) or a light stabilizer (d2) with respect to 100 weight part of acrylic copolymers (A). The present invention relates to an ultraviolet blocking resin composition according to any one of the first to seventh inventions.

  In a ninth aspect of the invention, any one of the first to eighth aspects is characterized in that the acrylic copolymer (A) is an acrylic copolymer (A1) having a glass transition temperature of −80 to 0 ° C. The present invention relates to an ultraviolet blocking resin composition described in the invention.

  The tenth invention relates to the ultraviolet blocking resin composition according to any one of the first to ninth inventions, which is an ultraviolet blocking adhesive.

  In an eleventh aspect of the invention, a sheet obtained by peeling treatment is laminated on one surface of an ultraviolet blocking adhesive layer formed from the ultraviolet blocking adhesive described in the tenth invention, and the ultraviolet blocking adhesive The present invention relates to an ultraviolet blocking adhesive sheet, characterized in that a plastic substrate film or a release-treated sheet is laminated on the other surface of the agent layer.

  In the twelfth invention, an ultraviolet blocking resin composition layer formed from the ultraviolet blocking resin composition according to any one of the first to ninth inventions is supported on the surface of the glass member for organic electroluminescence. The present invention relates to a member for an organic electroluminescence cell.

  Furthermore, the thirteenth invention is formed by sequentially laminating a glass member for organic electroluminescence, an ultraviolet blocking adhesive layer formed from the ultraviolet blocking adhesive described in the tenth invention, and a plastic substrate film. It is related with the member for organic electroluminescent cells characterized by these.

Furthermore, the fourteenth invention peels off the release-treated sheet from the ultraviolet blocking adhesive sheet according to the eleventh invention, and the plastic substrate film is made into an organic electrolysis film through the exposed ultraviolet blocking adhesive layer. Or stick to the glass member for luminescence,
Alternatively, one of the sheets peeled from the ultraviolet blocking adhesive sheet according to the eleventh invention is peeled off, a plastic substrate film is laminated on the exposed ultraviolet blocking adhesive layer, and then the remaining peeling treatment Peel off the formed sheet, and paste the plastic substrate film to the glass member for organic electroluminescence through the exposed UV blocking adhesive layer,
Alternatively, one of the sheets peeled from the ultraviolet blocking adhesive sheet according to the eleventh invention is peeled off, and an organic electroluminescence glass member is laminated on the exposed ultraviolet blocking adhesive layer, and then the remaining peeling Peeling off the processed sheet and laminating a plastic base film on the exposed UV blocking adhesive layer,
The present invention relates to a method for manufacturing an organic electroluminescence cell member.

  According to the present invention, it is an ultraviolet blocking resin composition that is excellent in transparency without being colored, and can sufficiently block ultraviolet rays in the entire wavelength range of 290 nm to 420 nm, and has the ultraviolet blocking performance against heat and moisture heat durability. It is possible to provide an ultraviolet blocking resin composition capable of forming a pressure-sensitive adhesive layer or a coating film that is excellent in adhesion performance, coating film surface state and adhesion, heat resistance and moisture heat resistance. Became. By utilizing the ultraviolet blocking resin composition of the present invention, organic EL elements and light emitting diodes can be effectively protected from ultraviolet rays having a wavelength of 290 nm to 420 nm.

The ultraviolet blocking resin composition of the present invention reacts with at least one of the acrylic copolymer (A) having a hydroxyl group and / or (anhydrous) carboxylic acid group, a hydroxyl group, and an (anhydrous) carboxylic acid group as described above. Reactive compound (B), at least one of pyrrolidine-amide-based ultraviolet absorber (c1) or xanthone-based ultraviolet absorber (c2), which has an ultraviolet blocking function in a relatively long wavelength region, and the ultraviolet ray An ultraviolet absorber other than the absorbers (c1) and (c2), containing an ultraviolet absorber (c3) capable of absorbing ultraviolet rays having a wavelength of 380 nm or less, and further containing an antioxidant (d1) or a light stabilizer (d2 ) At least one of them.
An organic EL element is obtained by sticking an ultraviolet blocking adhesive sheet using an ultraviolet blocking adhesive that is one of the embodiments of the ultraviolet blocking resin composition of the present invention to the surface of a glass member for organic EL. Can be effectively protected from ultraviolet rays.

<Acrylic copolymer (A)>
The ultraviolet blocking resin composition of the present invention can be used as an ultraviolet blocking adhesive and an ultraviolet blocking coating. The acrylic copolymer (A) is a component for forming most of the pressure-sensitive adhesive layer and the coating film together with the reactive compound (B) described later, and in each case, the ultraviolet absorbers (c1) to (described later) It is also a component for preventing (c3) etc. from falling off from the pressure-sensitive adhesive layer or coating film.
When the ultraviolet blocking resin composition of the present invention is used as an ultraviolet blocking adhesive, it is necessary to exhibit well-balanced adhesive properties. In particular, it is important to achieve both tack and cohesion. Therefore, it is preferable to use an acrylic copolymer (A1) having a glass transition temperature (Tg) of −80 to 0 ° C. as the acrylic copolymer (A).
When an ultraviolet blocking resin composition having an acrylic copolymer (A) having a Tg of less than −80 ° C. is used as a pressure-sensitive adhesive, the cohesive force of the pressure-sensitive adhesive layer to be formed decreases and floats from the adherend. Peeling easily occurs. On the other hand, when an ultraviolet blocking resin composition having an acrylic copolymer (A) having a Tg of more than 0 ° C. is used as a pressure-sensitive adhesive, there is a possibility that sufficient adhesive strength cannot be obtained.

The acrylic copolymer (A1) having a Tg of −80 to 0 ° C. suitably used for forming the ultraviolet blocking adhesive of the present invention can be obtained, for example, as follows.
That is, an acrylic acid ester or methacrylic acid ester (referred to as an acrylic monomer) having no hydroxyl group or (anhydrous) carboxylic acid group as a main component, having a radical polymerizable ethylenically unsaturated double bond, and a hydroxyl group and It is formed from an acrylic monomer mixture having a monomer having a carboxylic acid group as an essential component. In addition to acrylic monomers, vinyl group-containing compounds can also be used.

As a monomer having a radically polymerizable ethylenically unsaturated double bond and having an (anhydrous) carboxylic acid group,
Acrylic acid, methacrylic acid;
Dibasic acids such as itaconic acid and maleic acid and their monoalkyl esters;
Unsaturated carboxylic acid anhydrides such as itaconic anhydride and maleic anhydride;
Etc.

As a monomer having a radical polymerizable ethylenically unsaturated double bond and a hydroxyl group,
For example, 2-hydroxyethyl (meth) acrylate ["2-hydroxyethyl acrylate" and "2-hydroxyethyl methacrylate" are collectively referred to as "2-hydroxyethyl (meth) acrylate". The same applies below. ], (Meth) acrylic acid 2-hydroxypropyl, (meth) acrylic acid 2-hydroxybutyl, (meth) acrylic acid 4-hydroxybutyl, (meth) acrylic acid ethylene oxide adducts, etc. Acrylic esters;

  For example, 2-hydroxy-4- {2- (meth) acryloyloxy} ethoxybenzophenone, 2-hydroxy-4- {2- (meth) acryloyloxy} butoxybenzophenone, 2,2′-dihydroxy-4- {2- Benzophenone-based (meth) acrylic esters such as (meth) acryloyloxy} ethoxybenzophenone, 2-hydroxy-4- {2- (meth) acryloyloxy} ethoxy-4 ′-(2-hydroxyethoxy) benzophenone;

  For example, 2,4-diphenyl-6- [2-hydroxy-4- (2- (meth) acryloyloxyethoxy)]-S-triazine, 2,4-bis (2-methylphenyl) -6- [2- Triazine-based (meth) acrylic acid esters such as hydroxy-4- (2- (meth) acryloyloxyethoxy)]-S-triazine;

For example, 2- (2′-hydroxy-5 ′-(meth) acryloyloxyethylphenyl) -2H-benzotriazole, 2- (2′-hydroxy-5 ′-(meth) acryloyloxyethylphenyl) -5-chloro Benzotriazole-based (meth) acrylic acid esters such as -2H-benzotriazole;
Etc.

As acrylic acid ester or methacrylic acid ester having neither hydroxyl group nor (anhydrous) carboxylic acid group,
For example, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, (meth) acrylic T-butyl acid, n-amyl (meth) acrylate, isoamyl (meth) acrylate, n-hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, (meta ) Alkyl (meth) acrylates such as decyl acrylate, dodecyl (meth) acrylate, octadecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate;

  For example, (meth) acrylic acid cyclic esters such as cyclohexyl (meth) acrylate, benzyl (meth) acrylate, isobonyl (meth) acrylate, phenyl (meth) acrylate, phenoxyethyl (meth) acrylate;

For example, unsaturated group-containing (meth) acrylate esters such as allyl (meth) acrylate, methallyl (meth) acrylate, vinyl (meth) acrylate;
Is mentioned.

  Other (meth) acrylic acid fluoroalkyl esters, phosphoric acid group-containing (meth) acrylic acid esters, sulfonyl group-containing (meth) acrylic acid alkyl esters, heterocycle-containing (meth) acrylic acid esters, amino groups Examples thereof include (meth) acrylic acid esters, alkoxysilyl group-containing (meth) acrylic acid esters, ethylene oxide adducts of (meth) acrylic acid whose terminals are alkoxylated, and the like.

Furthermore, as monomers that can be used in combination with acrylic monomers, aromatic vinyl monomers, fluorine-containing vinyl monomers, trialkyloxysilyl group-containing vinyl monomers, trivinyl ether single monomer Vinyl group-containing compounds such as polymers, monovinyl ether monomers, nitrile group-containing vinyl monomers, amide group-containing vinyl monomers, vinyl esters,
Esters of unsaturated carboxylic acids;
Alkenes such as ethylene, propylene, butene;
Examples thereof include dienes such as butadiene, isoprene, 2-methyl-1,3-butadiene, 2-chloro-1,3-butadiene, and the like.

  As described above, the ultraviolet blocking adhesive, which is a preferred embodiment of the ultraviolet blocking resin composition of the present invention, is a copolymer (A1) having a Tg of −80 to 0 ° C. as the acrylic copolymer (A). Is preferably used. Such a copolymer (A1) can form a homopolymer having a Tg of −50 ° C. or less as a monomer, such as 2-ethylhexyl acrylate, n-butyl acrylate, octyl acrylate, nonyl acrylate, 20% of 100% by weight of total monomers used for copolymerization of acrylic side chain acrylic acid ester or methacrylic acid ester such as decyl acrylate, lauryl acrylate, stearyl acrylate, lauryl methacrylate, stearyl methacrylate, etc. It is preferable to contain -80weight%.

Of the 100% by weight of the total monomer used for copolymerization, the remaining 80 to 20% by weight has a Tg of −30 to 30 in order to control the adhesive force and cohesive force and improve the compatibility with each ultraviolet absorber. It is preferably an acrylic monomer capable of forming a homopolymer in the range of 100 ° C., and a monomer having a hydroxyl group and / or (anhydrous) carboxylic acid group involved in the reaction with the reactive compound (B) described later The body and other monomers are preferably used in an amount of 80 to 20% by weight.
The monomer having a hydroxyl group and / or (anhydrous) carboxylic acid group is preferably 0.01 to 20% by weight out of 100% by weight of the total monomers used for copolymerization, and 0.05 to 10%. A range of% by weight is more preferred. If it is less than 0.01% by weight, a sufficient cross-linked structure cannot be obtained, so the cohesive force of the adhesive layer is low, and the stability and durability during repeated use are inferior, which is not preferable. On the other hand, if it exceeds 20% by weight, the cohesive force of the adhesive layer becomes too high, and it is easy to peel off due to environmental changes between the laminated glass surfaces.

  According to a conventional method, the acrylic copolymer (A) used in the present invention is 0.001 to 5 parts by weight of a polymerization initiator with respect to a total of 100 parts by weight of the above-described monomers, It is synthesized by a method such as bulk polymerization, solution polymerization, emulsion polymerization or suspension polymerization. Preferably, it is synthesized by solution polymerization.

  The weight average molecular weight (Mw) of the acrylic copolymer (A1) used in the ultraviolet blocking adhesive of the present invention is preferably 50,000 to 2,000,000 in terms of adhesiveness, A range of 000 to 1,500,000 is more preferable. If the Mw exceeds 2,000,000, the fluidity of the copolymer becomes poor, making it difficult to produce a pressure-sensitive adhesive sheet described below. If it is less than 50,000, cohesive failure of the pressure-sensitive adhesive layer is likely to occur. Absent.

<Reactive compound (B)>
The reactive compound (B) in the present invention is a compound having in its molecule a functional group capable of reacting with a hydroxyl group and / or an (anhydrous) carboxylic acid group, which is a functional group in the acrylic copolymer (A). is there. Examples of such compounds include polyisocyanate compounds, epoxy compounds, amine compounds, aziridine compounds, carbodiimide compounds, oxazoline compounds, melamine compounds, and metal chelate compounds. Among these, in order to act as a crosslinking agent, compounds having two or more functional groups capable of reacting with the hydroxyl group and / or (anhydrous) carboxylic acid group in the copolymer (A) are preferably used.

For example, when the functional group in the copolymer (A) is an (anhydrous) carboxylic acid group, examples of the functional group of the compound (B) include an isocyanate group, an epoxy group, an amino group, an aziridyl group, and an oxazoline group. When the functional group in the polymer (A) is a hydroxyl group, the functional group of the compound (B) includes an isocyanate group and an N-methylol group.
In particular, polyisocyanate compounds are widely used because they are excellent in adhesiveness to an adherend and adhesiveness to a substrate film of a pressure-sensitive adhesive composition after a crosslinking reaction.

  For example, examples of the polyisocyanate compound include aromatic polyisocyanate, aliphatic polyisocyanate, araliphatic polyisocyanate, and alicyclic polyisocyanate.

  Aromatic polyisocyanates include 1,3-phenylene diisocyanate, 4,4′-diphenyl diisocyanate, 1,4-phenylene diisocyanate, 4,4′-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6-triisocyanate. Range isocyanate, 4,4'-toluidine diisocyanate, 2,4,6-triisocyanate toluene, 1,3,5-triisocyanate benzene, dianisidine diisocyanate, 4,4'-diphenyl ether diisocyanate, 4,4 ', 4 " -Triphenylmethane triisocyanate etc. can be mentioned.

  Aliphatic polyisocyanates include trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate (HDI), pentamethylene diisocyanate, 1,2-propylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butylene diisocyanate, dodecamethylene diisocyanate. 2,4,4-trimethylhexamethylene diisocyanate and the like.

  Examples of the araliphatic polyisocyanate include ω, ω′-diisocyanate-1,3-dimethylbenzene, ω, ω′-diisocyanate-1,4-dimethylbenzene, ω, ω′-diisocyanate-1,4-diethylbenzene, , 4-tetramethylxylylene diisocyanate, 1,3-tetramethylxylylene diisocyanate, and the like.

  Examples of alicyclic polyisocyanates include 3-isocyanate methyl-3,5,5-trimethylcyclohexyl isocyanate (IPDI), 1,3-cyclopentane diisocyanate, 1,3-cyclohexane diisocyanate, 1,4-cyclohexane diisocyanate, methyl- Examples include 2,4-cyclohexane diisocyanate, methyl-2,6-cyclohexane diisocyanate, 4,4′-methylene bis (cyclohexyl isocyanate), 1,4-bis (isocyanate methyl) cyclohexane and the like.

  Moreover, the trimethylol propane adduct body of the said polyisocyanate, the trimer which has an isocyanurate ring, etc. can be used together. Polyphenylmethane polyisocyanate (PAPI), naphthylene diisocyanate, and these polyisocyanate modified products can be used. As the polyisocyanate-modified product, a carbodiimide group, a uretdione group, a uretoimine group, a burette group reacted with water, a group of isocyanurate groups, or a modified product having two or more of these groups can be used. A reaction product of a polyol and a diisocyanate can also be used as a polyisocyanate compound.

  These polyisocyanate compounds include 4,4′-diphenylmethane diisocyanate, hexamethylene diisocyanate, 3-isocyanate methyl-3,5,5-trimethylcyclohexyl isocyanate (also known as isophorone diisocyanate), xylylene diisocyanate, 4,4 ′. Use of a non-yellowing or hardly yellowing polyisocyanate compound such as methylenebis (cyclohexyl isocyanate) (hydrogenated MDI) is particularly preferred from the viewpoint of weather resistance.

  When a polyisocyanate compound is used as the reactive compound (B), a known catalyst can be used as necessary to accelerate the reaction. Examples thereof include tertiary amine compounds and organometallic compounds. Examples of organometallic compounds include tin compounds and non-tin compounds. Among the above catalysts, dioctyltin dilaurate, dibutyltin dilaurate (DBTDL), tin 2-ethylhexanoate and the like are preferable in terms of reactivity. These can be used alone or in combination.

  Examples of the epoxy compound in the reactive compound (B) include a bisphenol type epoxy resin, a phenol novolac type epoxy resin, a cresol novolak type epoxy resin, and the like.

  Of the reactive compounds (B), examples of amine compounds can be used without particular limitation as long as they are polyamines having two or more primary amino groups. An aliphatic polyamine (which may contain an aromatic ring in its skeleton), which is a polyamine having two or more primary amino groups that are not bonded, is preferred. Ketimine, which is a reaction product of polyamine and ketone, can also be used as the amine compound.

  Among the reactive compounds (B), examples of the aziridine compound include N, N′-diphenylmethane-4,4′-bis (1-aziridinecarboxite), N, N′-toluene-2,4-bis ( 1-aziridinecarboxite), bisisophthaloyl-1- (2-methylaziridine), tri-1-aziridinylphosphine oxide, N, N′-hexamethylene-1,6-bis (1-aziridinecarboxite) ), Trimethylolpropane-tri-β-aziridinylpropionate, tetramethylolmethane-tri-β-aziridinylpropionate, tris-2,4,6- (1-aziridinyl) -1,3, 5-triazine, trimethylolpropane tris [3- (1-aziridinyl) propionate], trimethylolpropane tris [3- (1-a Dilidinyl) butyrate], trimethylolpropane tris [3- (1- (2-methyl) aziridinyl) propionate], trimethylolpropane tris [3- (1-aziridinyl) -2-methylpropionate], pentaerythritol tetra [ 3- (1-aziridinyl) propionate], diphenylmethane-4,4-bis-N, N′-ethyleneurea, 1,6-hexamethylenebis-N, N′-ethyleneurea, 2,4,6- (tri And ethyleneimino) -Syn-triazine, bis [1- (2-ethyl) aziridinyl] benzene-1,3-carboxylic acid amide, and the like.

Among the reactive compounds (B), the carbodiimide compound is a compound having two or more carbodiimide groups (—N═C═N—) in the molecule, and known polycarbodiimides can be used.
Moreover, as a carbodiimide compound, the high molecular weight polycarbodiimide produced | generated by carrying out the decarboxylation condensation reaction of diisocyanate in presence of a carbodiimidization catalyst can also be used. Examples of the diisocyanate include those described above.
Examples of such high molecular weight polycarbodiimides include the Carbodilite series of Nisshinbo Industries, Ltd. Of these, Carbodilite V-01, 03, 05, 07, 09 is preferable because of its excellent compatibility with organic solvents.

  Of the reactive compounds (B), the oxazoline compound is a compound having two or more oxazoline groups in the molecule. Specific examples include 2'-methylenebis (2-oxazoline), 2,2'-ethylenebis (2-oxazoline), 2,2'-ethylenebis (4-methyl-2-oxazoline), and the like. . Alternatively, vinyl monomers such as 2-isopropenyl-2-oxazoline and 2-isopropenyl-4,4-dimethyl-2-oxazoline and other monomers copolymerizable with this vinyl monomer And a copolymer thereof.

  Among the reactive compounds (B), the melamine compound is a compound having a triazine ring in the molecule. Examples include melamine, benzoguanamine, cyclohexanecarboguanamine, methylguanamine, vinylguanamine, hexamethoxymethylmelamine, tetramethoxymethylbenzoguanamine and the like. Further, these low condensation products, alkyl etherified formaldehyde resins, and aminoplast resins may be used.

  Among the reactive compounds (B), examples of the metal chelate compound include polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, titanium, nickel, antimony, magnesium, vanadium, chromium, zirconium, and acetylacetone. And coordination compounds with ethyl acetoacetate.

<Ultraviolet absorber>
In the present invention, as the ultraviolet absorber, at least one of the pyrrolidine-amide ultraviolet absorber (c1) or the xanthone ultraviolet absorber (c2) is essential, and other ultraviolet absorbers having a wavelength of 380 nm or less. It is important to further contain an ultraviolet absorber (c3) capable of absorbing the ultraviolet rays.

<Pyrrolidine-amide UV absorber (c1)>
The pyrrolidine-amide ultraviolet absorber (c1) is excellent in terms of ultraviolet blocking performance at a wavelength of 370 nm or more, specifically 390 nm or more, and particularly excellent in terms of ultraviolet blocking performance near 400 nm.
However, the pyrrolidine-amide ultraviolet absorber (c1) may be thermally decomposed to generate a volatile component. Therefore, the pressure-sensitive adhesive layer containing it may float or peel off from the adherend due to the influence of volatile components resulting from thermal decomposition. Moreover, the coating film containing this ultraviolet absorber (c1) may be affected by volatile components generated as a result of thermal decomposition, and cracks may be generated or adhesion may be reduced.
If the ultraviolet absorber (c1) is decomposed, naturally, the ultraviolet blocking performance of the pressure-sensitive adhesive layer or coating film containing the ultraviolet absorber is also affected by heat.
Furthermore, there is a possibility that oxygen radicals are generated during the pyrolysis of the pyrrolidine-amide ultraviolet absorber (c1), and the generated oxygen radicals oxidize and degrade the acrylic copolymer (A). When the acrylic copolymer (A) is oxidatively deteriorated, the adhesive performance of the pressure-sensitive adhesive layer or coating film containing the acrylic copolymer (A) and the performance as a coating film are lowered.
And humidity promotes the influence of heat.
Therefore, in order to prevent these phenomena, it is important to use an antioxidant (d1) and a light stabilizer (d2) in combination as described later. The content of the pyrrolidine-amide-based UV absorber (c1) is determined in consideration of the UV blocking performance, its heat and moisture resistance, and the balance of the adhesion performance and coating performance against heat and moisture resistance. Can be determined as appropriate.

  As the pyrrolidine-amide ultraviolet absorber (c1) used in the present invention, as represented by the following general formula (I), a pyrrolidine-cyanoamide ultraviolet absorber having both a pyrrolidine skeleton and a cyanoamide skeleton in the molecule, And a pyrrolidine-cyanosulfonamide ultraviolet absorber having both a pyrrolidine skeleton and a cyanosulfonamide skeleton as shown by the following general formula (II). These are excellent compounds in terms of ultraviolet blocking performance with a wavelength of 370 nm or more.

In general formulas (I) and (II), R _{1 to} R ₂ are each independently H, OH group, alkylamino group, acylamino group, arylamino group, halogen, cyano group, or C1 to C26. It is any one selected from a linear or branched or alicyclic hydrocarbon group and a polyoxyalkylene group having 2 to 3 carbon atoms, and R ₁ is a cyclic hydrocarbon group which may contain a hetero atom. It may be.

Examples of the pyrrolidine-cyanoamide compound represented by the general formula (I) include:
2-cyano-N-dodecyl-4- (1-ethyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₂ H ₅ , R ₂ = C ₁₂ H ₂₅ >>
2-cyano-N-dodecyl-4- (1-methyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = CH ₃ , R ₂ = C ₁₂ H ₂₅ >>,
2-cyano-N-dodecyl-4- (1-propyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₃ H ₇ , R ₂ = C ₁₂ H ₂₅ >>
2-cyano-N-dodecyl-4- (1-butyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₄ H ₉ , R ₂ = C ₁₂ H ₂₅ >>,
2-cyano-N-undecyl-4- (1-ethyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₂ H ₅ , R ₂ = C ₁₁ H ₂₃ >>,
2-cyano-N-decyl-4- (1-ethyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₂ H ₅ , R ₂ = C ₁₀ H ₂₁ >>,
2-cyano-N-tridecyl-4- (1-ethyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₂ H ₅ , R ₂ = C ₁₃ H ₂₇ >>,
2-cyano-N-tetradecyl-4- (1-ethyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₂ H ₅ , R ₂ = C ₁₄ H ₂₉ >>,
2-cyano-N-cyclohexyl-4- (1-ethyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₂ H 5, R ₂ = C ₆ H ₁₁ >>,
2-cyano-N-dodecyl-4- (1-benzyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₆ H 5, R ₂ = C ₁₂ H ₂₅ >>,
2-cyano-N-hydroxy-4- (1-ethyl-2-pyrrolidinylidene) -2-butenamide << R ₁ = C ₂ H 5, R ₂ = OH >>
2-cyano-N-ethyl-4- (1-hydroxy-2-pyrrolidinylidene) -2-butenamide << R ₁ = OH, R ₂ = C ₂ H ₅ >> and the like.

Examples of the pyrrolidine-cyanosulfone compound represented by the general formula (II) include
2-cyano-N-dodecyl-4- (1-ethyl-2-pyrrolidinylidene) -2-sulfonamide << R ₁ = C ₂ H 5, R ₂ = C ₁₂ H ₂₅ >>
2-cyano-N-dodecyl-4- [1- (4-pyridinyl) -2-pyrrolidinylidene] -2-sulfonamide << R ₁ = C ₅ H ₄ N, R ₂ = C ₁₂ H ₂₅ >>
2-cyano-N-hydroxy-4- (1-ethyl-2-pyrrolidinylidene) -2-sulfonamide << R ₁ = C ₂ H 5, R ₂ = OH >>
2-cyano-N-dodecyl-4- (1-hydroxy-2-pyrrolidinylidene) -2-sulfonamide << R ₁ = OH, R ₂ = C ₁₂ H ₂₅ >>,
2-cyano-N-dodecyl-4- (1-cyclohexyl-2-pyrrolidinylidene) -2-sulfonamide << R ₁ = OH, R ₂ = C ₆ H ₁₁ >> and the like.
In particular, it is not limited to these. These may use only 1 type or may use multiple types together.

<Xanthone UV absorber (c2)>
The xanthone-based ultraviolet absorber (c2) is excellent in terms of ultraviolet blocking performance at wavelengths of 380 nm or more, specifically 390 nm or more, and particularly excellent in terms of ultraviolet blocking performance near 410 nm.
The xanthone ultraviolet absorber (c2) is widely used as a radical photopolymerization initiator in ultraviolet curable compositions such as ultraviolet curable inks and ultraviolet curable paints. That is, the xanthone ultraviolet absorber (c2) has a property of absorbing ultraviolet rays and generating radicals. When the radical is generated, the acrylic copolymer (A) is damaged, and there is a possibility of affecting the sticking performance and the state of the coating film.
Therefore, in order to prevent these phenomena, it is important to use an antioxidant (d1) and a light stabilizer (d2) in combination as described later. The content of the xanthone-based ultraviolet absorber (c2) can be appropriately determined in consideration of the ultraviolet blocking performance and the damage that can be given to the acrylic copolymer (A).

  Examples of the xanthone ultraviolet absorber (c2) used in the present invention include an acridone ultraviolet absorber having an acridone skeleton in a molecule represented by the following general formula (III), and a molecule represented by the following general formula (IV). A narrowly defined xanthone ultraviolet absorber having a xanthone skeleton therein, and a thioxanthone ultraviolet absorber having a thioxanthen-9-one skeleton in a molecule represented by the following general formula (V) are exemplified. As described above, it is excellent in terms of ultraviolet blocking performance at a wavelength of 380 nm or more, and ultraviolet rays can be blocked to a wavelength in the vicinity of 420 nm by appropriately selecting a functional group.

In the general formulas (III) to (V), R _{3 to} R ₁₁ are each independently H, OH group, alkylamino group, acylamino group, arylamino group, halogen, cyano group, or straight chain having 1 to 26 carbon atoms. R ₁₁ is any one selected from a chain or branched chain or an alicyclic hydrocarbon group and a polyoxyalkylene group having 2 to 3 carbon atoms, and R ₁₁ is a cyclic hydrocarbon group which may contain a hetero atom. May be.

Among the xanthone ultraviolet absorbers (c2), examples of the acridone ultraviolet absorbers represented by the general formula (III) include:
Acridone << R ₃ = R ₄ = R ₅ = R ₆ = R ₇ = R ₈ = R ₉ = R ₁₀ = R ₁₁ = H >>
Ethyl 10 - acridone _{"R 11 = C 2 H 5} , R 3 = R 4 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-ethyl-2-chloro-acridone _{"R 11 = C 2 H 5} , R 4 = Cl, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-propyl-2-chloro-acridone _{"R 11 = C 3 H 7} , R 4 = Cl, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-butyl-2-chloro-acridone _{"R 11 = C 4 H 9} , R 4 = Cl, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-ethyl-2-chloro-acridone _{"R 11 = C 2 H 5} , R 4 = Cl, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-ethyl-2-bromo acridone _{"R 11 = C 2 H 5} , R 4 = Br, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-propyl-2-bromo-acridone _{"R 11 = C 3 H 7} , R 4 = Br, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-butyl-2-bromo-acridone _{"R 11 = C 4 H 9} , R 4 = Br, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10 Hepsyl -2-chloro acridone _{"R 11 = C 5 H 11} , R 4 = Cl, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10 hexyl-2-chloro-acridone _{"R 11 = C 6 H 13} , R 4 = Cl, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-ethyl-2-iodo acridone _{"R 11 = C 2 H 5} , R 4 = I, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-propyl-2-iodo-acridone _{"R 11 = C 3 H 7} , R 4 = I, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-butyl-2-iodo acridone _{"R 11 = C 4 H 9} , R 4 = I, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-ethyl-2-cyano-acridone _{"R 11 = C 2 H 5} , R 4 = CN, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-propyl-2-cyano-acridone _{"R 11 = C 3 H 7} , R 4 = CN, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-butyl-2-cyano-acridone _{"R 11 = C 4 H 9} , R 4 = CN, R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
10-butyl-2-ethyl acridone _{"R 11 = C 4 H 9} , R 4 = C 2 H 5, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
10-ethyl-2,5-dichloro-acridone _{"R 11 = C 2 H 5} , R 4 = R 8 = Cl, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
10-butyl-2,5-dihydroxy-acridone _{"R 11 = C 4 H 9} , R 4 = R 8 = OH, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
10- cyclohexyl-2,5-dihydroxy-acridone _{"R 11 = C 6 H 11} , R 4 = R 8 = OH, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
10-ethyl-2-chloro-5-cyano-acridone _{"R 11 = C 2 H 5} , R 4 = Cl, R 8 = CN, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H >>,
10-butyl--2,4,5,8- tetrachloro acridone _{"R 11 = C 4 H 9} , R 4 = R 5 = R 8 = R 9 = Cl, R 3 = R 5 = R 6 = R 7 = R ₁₀ = H >> and the like. These may use only 1 type or may use multiple types together.

Among the xanthone-based ultraviolet absorbers (c2), as a narrowly-defined xanthone-based ultraviolet absorber represented by the general formula (IV), for example,
Xanthone _{"R 3 = R 4 = R} 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-methyl-xanthone _{"R 4 = CH 3, R} 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-ethyl thioxanthone _{"R 4 = C 2 H 5} , R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-isopropyl thioxanthone _{"R 4 = C 3 H 7} , R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-butylxanthone (R ₄ = C ₄ H ₉ , R ₃ = R ₅ = R ₆ = R ₇ = R ₈ = R ₉ = R ₁₀ = H),
2-cyclohexyl-xanthone _{"R 4 = C 6 H 11} , R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2,4-dimethyl thioxanthone _{"R 4 = R 6 = CH} 3, R 3 = R 5 = R 7 = R 9 = R 8 = R 10 = H",
2,5-dimethyl thioxanthone _{"R 4 = R 8 = CH} 3, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
2,4 diethylxanthone _{"R 4 = R 6 = C} 2 H 5, R 3 = R 5 = R 7 = R 9 = R 8 = R 10 = H",
2,4-diisopropyl thioxanthone _{"R 4 = R 6 = C} 3 H 7, R 3 = R 5 = R 7 = R 9 = R 8 = R 10 = H",
2-chloroxanthone << R ₄ = Cl, R ₃ = R ₅ = R ₆ = R ₇ = R ₈ = R ₉ = R ₁₀ = H >>
4-chloro xanthone _{"R 5 = Cl, R 3} = R 4 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-bromo-xanthone _{"R 4 = Br, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-iodo-xanthone _{"R 4 = I, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-cyano-xanthone _{"R 4 = CN, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2,4-dichloroxanthone << R ₄ = R ₆ = Cl, R ₃ = R ₅ = R ₇ = R ₉ = R ₈ = R ₁₀ = H >>,
2,5-dichloroxanthone << R ₄ = R ₈ = Cl, R ₃ = R ₅ = R ₆ = R ₇ = R ₉ = R ₁₀ = H >>,
2-hydroxy-thioxanthone _{"R 4 = OH, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2,5-dihydroxyxanthone << R ₄ = R ₈ = OH, R ₃ = R ₅ = R ₆ = R ₇ = R ₉ = R ₁₀ = H >>,
2-chloro-5-cyano-xanthone _{"R 4 = Cl, R 8} = CN, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
2,4,5,8- tetrachloro-xanthone _{"R 4 = R 5 = R} 8 = R 9 = Cl, R 3 = R 6 = R 7 = R 10 = H" , and the like. These may use only 1 type or may use multiple types together.

Among the xanthone ultraviolet absorbers (c2), as the thioxanthone ultraviolet absorber represented by the general formula (V), for example,
Thioxanthone _{"R 3 = R 4 = R} 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-methyl thioxanthone _{"R 4 = CH 3, R} 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-ethyl thioxanthone _{"R 4 = C 2 H 5} , R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-isopropylthioxanthone _{"R 4 = C 3 H 7} , R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-butyl-thioxanthone _{"R 4 = C 4 H 9} , R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-cyclohexyl-thioxanthone _{"R 4 = C 6 H 11} , R 3 = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2,4-dimethyl thioxanthone _{"R 4 = R 6 = CH} 3, R 3 = R 5 = R 7 = R 9 = R 8 = R 10 = H",
2,5-dimethyl thioxanthone _{"R 4 = R 8 = CH} 3, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
2,4-diethyl thioxanthone _{"R 4 = R 6 = C} 2 H 5, R 3 = R 5 = R 7 = R 9 = R 8 = R 10 = H",
2,4-diisopropyl thioxanthone _{"R 4 = R 6 = C} 3 H 7, R 3 = R 5 = R 7 = R 9 = R 8 = R 10 = H",
Chlorothioxanthone _{"R 4 = Cl, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
4-chlorothioxanthone _{"R 5 = Cl, R 3} = R 4 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-bromo-thioxanthone _{"R 4 = Br, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-iodo-thioxanthone _{"R 4 = I, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2-cyano-thioxanthone _{"R 4 = CN, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2,4-dichlorothioxanthone << R ₄ = R ₆ = Cl, R ₃ = R ₅ = R ₇ = R ₉ = R ₈ = R ₁₀ = H >>,
2,5-dichlorothioxanthone << R ₄ = R ₈ = Cl, R ₃ = R ₅ = R ₆ = R ₇ = R ₉ = R ₁₀ = H >>,
2-hydroxy-thioxanthone _{"R 4 = OH, R 3} = R 5 = R 6 = R 7 = R 8 = R 9 = R 10 = H",
2,5-dihydroxy thioxanthone _{"R 4 = R 8 = OH} , R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
2-chloro-5-cyano-thioxanthone _{"R 4 = Cl, R 8} = CN, R 3 = R 5 = R 6 = R 7 = R 9 = R 10 = H",
2,4,5,8- tetrachloro-thioxanthone _{"R 4 = R 5 = R} 8 = R 9 = Cl, R 3 = R 6 = R 7 = R 10 = H" , and the like. These may use only 1 type or may use multiple types together.

<Other UV absorber (c3)>
As described above, the ultraviolet blocking resin composition of the present invention essentially comprises at least one of the pyrrolidine-amide ultraviolet absorber (c1) or the xanthone ultraviolet absorber (c2), and is an ultraviolet absorber other than these. It is important to further contain an ultraviolet absorber (c3) that can absorb ultraviolet rays having a wavelength of 380 nm or less.
That is, the ultraviolet absorbers (c1) and (c2) mainly have an ultraviolet blocking function in a long wavelength region, specifically, a wavelength of 390 nm or more. However, as described above, these ultraviolet absorbers may be affected by heat, wet heat, or ultraviolet rays. Moreover, the ultraviolet absorbers (c1) and (c2) have a slightly insufficient ultraviolet blocking ability in the vicinity of a wavelength of 350 to 370 nm.
Therefore, in order to block ultraviolet rays having a wavelength of 380 nm or less, other ultraviolet absorptions having the effect of absorbing ultraviolet rays having a wavelength of 380 nm or less and changing them into energy such as electromagnetic waves that are not easily affected by heat, wet heat or ultraviolet rays. It is important to use the agent (c3) in combination.

  Examples of such other ultraviolet absorbers (c3) include benzotriazole, triazine, benzoxazine, salicylic acid ester, benzophenone, 2-cyanoacrylic acid ester, anthranilate, cinnamic acid derivative. Compounds such as system, camphor derivative, benzalmalonate derivative, resorcinol, oxanilide, dibenzoylmethane, coumarin derivative and benzoic acid derivative can be used.

  Examples of the benzotriazole series include 2,2-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6-[(2H-benzotriazol-2-yl) phenol]], 2- ( 2H-benzotriazol-2-yl) -4,6- (1-methyl-1-phenylethyl) phenol, 2- (2H-benzotriazol-2-yl) -4- (1,1,3,3- Tetramethylbutyl) phenol, 2,4-di-tert-butyl-6- (5-chlorobenzotriazol-2-yl) phenol, 2- [5-chloro (2H) -benzotriazol-2-yl] -4 -Methyl-6- (tert-butyl) phenol, 2- (2H-benzotriazol-2-yl) -4,6-di-tert-pentylphenol, 2- (2H-benzotriazole- A compound such as 2-yl) -p-cresol can be mentioned.

  Examples of triazines include 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(hexyl) oxy] -phenol, 2,4,6-tris- (diisobutyl 4 '-Amino-benzalmalonate) -s-triazine, 4,6-tris (2-hydroxy-4-octyloxyphenyl) -1,3,5-triazine, 2- (2-hydroxy-4-octyloxy) Phenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2,4-dihydroxyphenyl) -4,6-bis (2,4-dimethylphenyl)- 1,3,5-triazine, 2,4-bis (2-hydroxy-4-propyloxyphenyl) -6- (2,4-dimethylphenyl) -1,3,5-triazine, 2- (2-hydroxy -4-do Can be mentioned sill) -4,6-bis (2,4-dimethylphenyl) -1,3,5-compounds such as triazines.

  Examples of the benzophenone series include benzophenone, methylbenzophenone, 4-hydroxybenzophenone, 4-methoxybenzophenone, 4-octoxybenzophenone, 4-decyloxybenzophenone, 4-dodecyloxybenzophenone, 4-benzyloxybenzophenone, 4,2 ′. , 4'-trihydroxybenzophenone, 2'-hydroxy-4,4'-dimethoxybenzophenone, 4- (2-ethylhexyloxy) -2-hydroxy-benzophenone, o-benzoylbenzoic acid methyl p-benzoin ethyl ether, etc. Is mentioned.

  Examples of the 2-cyanoacrylic acid ester include compounds such as ethyl α-cyano-β, β-diphenylacrylic acid ester and isooctyl α-cyano-β, β-diphenylacrylic acid ester.

  Examples of salicylic acid esters include compounds such as isocetyl salicylate, octyl salicylate, glycol salicylate, and phenyl salicylate.

  As an anthranilate type | system | group, compounds, such as methyl anthranilate, are mentioned, for example.

  Cinnamic acid derivatives include, for example, ethylhexylmethoxycinnamate, isopropylmethoxycinnamate, isoamylmethoxycinnamate, diisopropylmethylcinnamate, glyceryl-ethylhexanoate dimethoxycinnamate, methyl-α-carbomethoxycinnamate, methyl- and compounds such as α-cyano-β-methyl-p-methoxycinnamate.

  Examples of the camphor derivative system include compounds such as benzylidene camphor, benzylidene camphor sulfonic acid, camphor benzalkonium methosulphate, terephthalylidene dicamphor sulfonic acid, polyacrylamide methyl benzylidene camphor, and the like.

  Examples of the resorcinol type include compounds such as dibenzoyl resorcinol and bis (4-tert-butylbenzoyl resorcinol).

  Examples of the oxalinide series include 4,4'-di-octyloxy oxanilide, 2,2'-diethoxyoxy oxanilide, 2,2'-di-octyloxy-5,5'-di-tert. -Butyl oxanilide, 2,2'-di-dodecyloxy-5,5'-di-tert-butyl oxanilide, 2-ethoxy-2'-ethyl oxanilide, N, N'-bis (3 -Dimethylaminopropyl) oxanilide, 2-ethoxy-5-tert-butyl-2'-ethoxyoxanilide and the like.

  Examples of the dibenzoylmethane series include compounds such as 4-tert-butyl-4′-methoxydibenzoylmethane.

Examples of the coumarin derivative system include compounds such as 7-hydroxycoumarin.
As the benzoxazine system, 3-methyl-2- (2- (1-methyl-2,5-diethyl-1H-pyrrol-3-yl) ethenyl) -benzoxazolium chloride,
And 3-ethyl-2- (2- (1-ethyl-2,5-dimethyl-1H-pyrrol-3-yl) ethenyl) -benzoxazolium chloride.
Examples of benzalmalonate include dimethicodiethylbenzalmalonate.
Examples of the benzoic acid derivative include diethylaminohydroxybenzoyl hexyl benzoate and the like.

<Antioxidant (d1) or light stabilizer (d2)>
The antioxidant (d1) or the light stabilizer (d2) suppresses the thermal decomposition of the pyrrolidine-amide ultraviolet absorber (c1) that tends to be thermally decomposed, or is irradiated with ultraviolet rays to give a xanthone ultraviolet absorber. It bears the function of suppressing the acrylic copolymer (A) from being oxidized by radicals generated from (c2).

  As the antioxidant (d1) used in the present invention, an oxygen radical generated from a pyrrolidine-amide ultraviolet absorber (c1) or a xanthone ultraviolet absorber (c2) by heat or light energy is an acrylic copolymer. It is a compound that suppresses oxidation of (A) and has a function of preventing deterioration of the acrylic copolymer (A). For example, phenolic antioxidants, phosphorus antioxidants, sulfur antioxidants and the like are used.

  Examples of the phenolic antioxidant include monophenolic, bisphenolic, and polymeric phenolic antioxidants, and examples of the monophenolic antioxidant include 2,6-di-t-butyl-p-cresol. , Butylated hydroxyanisole, 2,6-di-t-butyl-4-ethylphenol, stearin-β- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, and the like.

  Examples of bisphenol antioxidants include 2,2′-methylenebis (4-methyl-6-tert-butylphenol), 2,2′-methylenebis (4-ethyl-6-tert-butylphenol), 4,4′-thiobis. (3-methyl-6-tert-butylphenol), 4,4′-butylidenebis (3-methyl-6-tert-butylphenol), 3,9-bis [1,1-dimethyl-2- [β- (3- t-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl] 2,4,8,10-tetraoxaspiro [5.5] undecane, and the like.

  Examples of the polymer type phenolic antioxidant include 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, 1,3,5-trimethyl-2,4,6- Tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, tetrakis- [methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenyl) propionate] methane, bis [3,3′-bis- (4′-hydroxy-3′-t-butylphenyl) butyric acid] glycol ester, 1,3,5-tris (3 ′, 5′-di-t-butyl-4 '-Hydroxybenzyl) -S-triazine-2,4,6- (1H, 3H, 5H) trione, tocophenol, and the like.

  Examples of the sulfur-based antioxidant include dilauryl 3,3′-thiodipropionate, dimyristyl 3,3′-thiodipropionate, distearyl 3,3′-thiodipropionate.

Phosphorous antioxidants include triphenyl phosphite, trisnonyl phenyl phosphite, di-cresyl phosphite, diphenyl isodecyl phosphite, phenyl diisodecyl phosphite, tris (2,4-di-tert-butylphenyl) Phosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol-di-phosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol-di-phosphite, etc. Can be mentioned.
These antioxidants may be used alone or in combination of two or more, but it is preferable to use a phosphorus-based antioxidant because it is difficult to color.

  The light stabilizer (d2) used in the present invention is a compound having a function of suppressing the generation of oxygen radicals that can be generated by light energy. By suppressing the generation of oxygen radicals, the acrylic copolymer (A ) Can be suppressed. As the light stabilizer (d2), hindered amine compounds (hereinafter abbreviated as “HALS”), hindered phenol compounds and the like can be used, and HALS is preferable.

  Examples of HALS include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate, poly [[6- (1,1,3,3-tetramethylbutyl) amino-1,3,5- Triazine-2,4-diyl] [(2,2,6,6-tetramethyl-4-piperidyl) imino] hexamethylene [(2,2,6,6-tetramethyl-4-piperidyl) imino]], 2,2'-thiobis (4-t-octylphenolate) alkylamine nickel, dibutylamine, 1,3,5-triazine, N, N-bis (2,2,6,6-tetramethyl-4-piperidyl Examples thereof include polycondensates of -1,6-hexamethylenediamine and N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine.

  Examples of hindered phenol compounds include 4,4′-thiobis (6-tert-3-methylphenol), 4,4′-butylidenebis (6-tert-butyl-3-methylphenol), and 4,4 ′. -Butylidene-bis (3-methyl-6-tert-butylphenol), 2,2'-thiobis (6-tert-butyl-4-methylphenol), 2,6-di-tert-butylphenol, 4,4'- Methylenebis (6-tert-butylphenol), 4,4′-bis (2,6-di-tert-butylphenol), 4,4′-methylenebis (6-tert-butyl-o-cresol), 4,4′- Thiobis (6-tert-butyl-o-cresol), 1,1,3-tris (5-tert-butyl-4-hydroxy-2-methylphenol) Nyl) butane, 2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) mesitylene, 1,3,5-tris (3,5-di-tert-butyl-4-hydroxy) Benzyl) isocyanurate, 1,3-bis (3,5-di-tert-butyl-4-hydroxyphenyl) -2,2′-bis (2-dodecylthionitroxycarbonyl) propane, 1,6-bis ( 3,5-bi-tert-butyl-4-hydroxyphenylacetoxy) hexane, 6- (4-hydroxy-3,5-di-tert-butylanilino) -2,4-bis (n-octylthio) -1, 3,5-triazine, tetrabis [β- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyloxymethyl] methane, n-octadecyl-3- (4′- Hydroxy-3 ′, 5′-di-tert-butylphenyl) propionate, di-octadecyl-4-hydroxy-3,5-di-tert-butylbenzylphosphonate, di-ethyl-4-hydroxy-3,5-di -Tert-butylbenzyl phosphonate etc. are mentioned, It is used also as the said phenolic antioxidant.

  The ultraviolet blocking resin composition of the present invention comprises 0.01 to 20 parts of the reactive compound (B) with respect to 100 parts by weight of the acrylic copolymer (A) having a hydroxyl group and / or (anhydrous) carboxylic acid group. Parts by weight, 0.001 to 10 parts by weight of pyrrolidine-amide-based UV absorber (c1) and / or 0.001 to 10 parts by weight of xanthone-based UV absorber (c2), and other UV absorbers (c3) It is preferable to contain 0.001-10 weight part and at least any one of antioxidant (d1) or light stabilizer (d2) 0.001-10 weight part, and reactive compound (B) is 0.01- 10 parts by weight, 0.005 to 5 parts by weight of pyrrolidine-amide ultraviolet absorber (c1) and / or 0.005 to 5 parts by weight of xanthone ultraviolet absorber (c2), other ultraviolet absorbers (c3) 0. 05-5 parts by weight, and more preferably contains 0.005 to 5 parts by weight of at least one antioxidant (d1) or a light stabilizer (d2).

When the content of the reactive compound (B) exceeds 20 parts by weight, when the obtained ultraviolet blocking resin composition is an ultraviolet blocking adhesive, the adhesiveness to the adherend tends to be lowered. In addition, if less than 0.01 part by weight, when the obtained ultraviolet blocking resin composition is an ultraviolet blocking adhesive, the cohesive force is decreased, and the heat resistance of the sticking performance and the heat resistance to moisture tend to decrease. is there.
Each of the ultraviolet rays described later due to changes in the external heat and force due to three-dimensional crosslinking of the pressure-sensitive adhesive composition by the reaction between the functional group in the copolymer (A) and the functional group in the reactive compound (B). Removal of the absorbent to the coating layer is reduced. As a result, in addition to ensuring adhesion to various adherends, it suppresses the generation of aggregates due to the localization of each UV absorber contained, and the adhesion performance under conditions that are severer than before Durability (resistance to heat and durability to heat and humidity) can also be improved. Therefore, by sticking the UV blocking adhesive sheet using the UV blocking adhesive of the present invention to the surface of the organic EL glass member exposed to a harsh environment, the organic EL element can be protected from UV rays over a long period of time. Can be protected.

  When either the total amount of the ultraviolet absorbers (c1) and (c2) or the amount of the ultraviolet absorber (c3) is less than 0.001 part by weight, almost no ultraviolet blocking performance can be expected. On the other hand, when either the total amount of the ultraviolet absorbers (c1) and (c2) or the amount of the ultraviolet absorber (c3) is more than 10 parts by weight, the resulting ultraviolet blocking resin composition may be colored. Since the transparency is lowered, the total amount of the ultraviolet absorbers (c1) and (c2) and the amount of the ultraviolet absorber (c3) are each preferably 0.001 to 10 parts by weight.

When the xanthone ultraviolet absorber (c2) is used, if the antioxidant (d1) is less than 0.001 part by weight, the oxidation of the acrylic copolymer (A) cannot be suppressed so much. When the pyrrolidine-amide ultraviolet absorber (c1) is used, if the light stabilizer (d2) is less than 0.001 part by weight, thermal decomposition of the pyrrolidine-amide ultraviolet absorber (c1) cannot be suppressed so much.
On the other hand, when the total amount of the antioxidant (d1) and the light stabilizer (d2) is more than 10 parts by weight, the transparency of the pressure-sensitive adhesive sheet described later is lowered, or (d1) (d2) depends on the color of itself. This is not preferable because coloring may cause a problem.

As long as the ultraviolet blocking resin composition of the present invention is within the range not impairing the effects of the present invention, fluorescent brighteners, various resins, silane coupling agents, softeners, dyes, pigments, tackifiers, plasticizers, fillings Agents, anti-aging agents, and the like.
The fluorescent whitening agent is a kind of dye and is a compound that has the effect of absorbing white light and converting it into pale light (fluorescence) to increase whiteness.
Examples of the optical brightener include benzoxazole, triazine, pyrazoline, and coumarin compounds.

<Ultraviolet blocking adhesive><Ultraviolet blocking adhesive sheet>
The ultraviolet blocking resin composition of the present invention is suitable as an ultraviolet blocking adhesive and preferably contains an organic solvent. In the case of the ultraviolet blocking adhesive, as described above, it is preferable to use the acrylic copolymer (A1) having a glass transition temperature of −80 to 0 ° C. as the acrylic copolymer (A).
Examples of the organic solvent used include organic solvents such as ethyl acetate, toluene, methyl ethyl ketone, isopropyl alcohol, and other hydrocarbon solvents.

The ultraviolet blocking adhesive sheet using the ultraviolet blocking adhesive of the present invention will be described.
The ultraviolet blocking adhesive sheet of the present invention exhibits the following modes.
(1) UV-blocking pressure-sensitive adhesive layer formed from a release-treated sheet / UV-blocking pressure-sensitive adhesive layer / Plastic substrate film not subjected to a peeling process (2) Peel-off sheet / UV-blocking pressure-sensitive adhesive UV-blocking pressure-sensitive adhesive layer formed from a sheet / peeled sheet

  The release-treated sheet used in the present invention is also called a separator or a release sheet, protects the surface of the adhesive layer until it is attached to an adherend, and is peeled off at the time of attachment. A silicone-containing paint or the like is applied to the surface of the plastic film.

The plastic base film is a plastic film whose surface is not peeled and is also called a plastic base sheet.
As such a plastic substrate film,
Polyvinyl alcohol film, triacetylcellulose film, polyolefin resin film such as polypropylene, polyethylene, polycycloolefin, ethylene-vinyl acetate copolymer, polyester resin film such as polyethylene terephthalate and polybutylene terephthalate, polycarbonate resin film Film, Polynorbornene resin film, Polyarylate resin film, Acrylic resin film, Polyphenylene sulfide resin film, Polystyrene resin film, Vinyl resin film, Polyamide resin film, Polyimide resin film And an epoxy resin film.
A multilayer plastic film in which a plurality of plastic films are laminated can also be used as a plastic substrate film in the present invention. For example, so-called optical films having various optical properties such as a polarizing film in which both surfaces of an iodine-containing polyvinyl alcohol film are sandwiched between triacetyl cellulose films, a retardation film, an elliptically polarizing film, an antireflection film, and a brightness enhancement film can also be used. .

The ultraviolet blocking adhesive sheet of the above aspect (1) is, for example,
(1-1) An ultraviolet blocking adhesive was applied to the release-treated surface of the release-treated sheet, and the liquid medium was removed as necessary to form an ultraviolet blocking adhesive layer. Laminating a plastic substrate film on the surface of the UV blocking adhesive layer,
(1-2) An ultraviolet blocking adhesive is applied on a plastic substrate film, and a liquid medium is removed as necessary to form an ultraviolet blocking adhesive layer. It can be obtained by laminating the release treatment surface of the release sheet on the surface of the layer.
In addition, the ultraviolet blocking adhesive sheet of the above aspect (2) is, for example,
(2-1) An ultraviolet blocking adhesive was applied to the release-treated surface of the release-treated sheet, and the liquid medium was removed as necessary to form an ultraviolet blocking adhesive layer. It can be obtained by laminating the release-treated surface of the release-treated sheet on the surface of the ultraviolet blocking adhesive layer.

  The cross-linking reaction between the acrylic copolymer (A) and the reactive compound (B) is performed by laminating a sheet or a plastic base film that is peeled off on the surface of the formed pressure-sensitive adhesive layer when the pressure-sensitive adhesive is dried. In this case, the process further proceeds after lamination.

As a method for applying the ultraviolet blocking adhesive of the present invention to a sheet or a plastic substrate film that has been subjected to a release treatment, there is no particular limitation, Mayer bar, applicator, brush, spray, roller, gravure coater, die coater, Various coating methods such as a lip coater, a comma coater, a knife coater, a reverse coater, and a spin coater can be mentioned.
There is no restriction | limiting in particular in a drying method, The thing using hot air drying, infrared rays, and the pressure reduction method is mentioned. As drying conditions, although it depends on the cured form of the resin composition, the film thickness, and the selected solvent, heating with hot air of about 60 to 180 ° C. is usually sufficient.
The thickness of the ultraviolet blocking adhesive layer is preferably 0.1 μm to 200 μm, and more preferably 0.1 μm to 100 μm. If it is less than 0.1 μm, sufficient adhesive strength may not be obtained, and if it exceeds 200 μm, characteristics such as adhesive strength are often not improved further.

<Organic EL cell components>
The organic EL cell member of the present invention is obtained by supporting an ultraviolet blocking resin composition layer formed from the ultraviolet blocking resin composition of the present invention on the surface of an organic EL glass member. The ultraviolet blocking resin composition layer can protect the organic EL element from ultraviolet rays, suppress / prevent deterioration of the organic EL element itself, improve visibility, and improve contrast in a bright place.
When the ultraviolet blocking resin composition is an ultraviolet blocking coating, the organic EL cell of the present invention is formed by directly coating the surface of the organic EL glass member with the ultraviolet blocking coating to form an ultraviolet blocking coating. A member for use can be obtained.
Similarly, when the ultraviolet blocking resin composition is an ultraviolet blocking adhesive, the ultraviolet blocking adhesive is directly applied to the surface of the organic EL glass member, and the surface of the formed ultraviolet blocking adhesive layer is formed. By laminating a plastic substrate film on the organic EL cell member of the present invention can be obtained. When the ultraviolet blocking resin composition is an ultraviolet blocking adhesive, the organic EL cell member of the present invention can also be obtained by using the ultraviolet blocking adhesive sheet described above.

For example, among the ultraviolet blocking adhesive sheet of the present invention,
Peel off the sheet that has been peeled from the ultraviolet blocking adhesive sheet of the above aspect (1), and stick the plastic substrate film to the organic EL glass member via the exposed ultraviolet blocking adhesive layer,
Alternatively, one of the sheets peeled from the ultraviolet blocking adhesive sheet of the above aspect (2) is peeled off, a plastic substrate film is laminated on the exposed ultraviolet blocking adhesive layer, and then the remaining peeling treatment Peel off the formed sheet, and stick the plastic substrate film to the glass member for organic EL through the exposed ultraviolet blocking adhesive layer,
Alternatively, one of the sheets peeled from the ultraviolet blocking adhesive sheet of the above aspect (2) is peeled off, and an organic EL glass member is laminated on the exposed ultraviolet blocking adhesive layer, and then the remaining peeling The organic EL cell member of the present invention can be obtained by peeling off the treated sheet and laminating a plastic substrate film on the exposed ultraviolet blocking adhesive layer.

  Specific examples of the present invention will be described below together with comparative examples, but the present invention is not limited to the following examples. In the following examples and comparative examples, “parts” and “%” represent “parts by weight” and “% by weight”, respectively.

<Production of acrylic copolymer (A)>
(Synthesis Example 1)
A polymerization tank, a stirrer, a thermometer, a reflux condenser, a dropping device, a polymerization reactor equipped with a nitrogen introduction tube, and a dropping device, the following acrylic monomers, organic solvents, and polymerization initiators in the following ratios: Prepared with.

[Polymerization tank]
N-Butyl acrylate 36.5 parts Methyl acrylate 12.5 parts Acrylic acid 1.0 part Ethyl acetate 30 parts 2,2′-Azobisisobutyronitrile 0.05 part [Drip device]
N-Butyl acrylate 36.5 parts Methyl acrylate 12.5 parts Acrylic acid 1.0 part Ethyl acetate 36 parts 2,2'-Azobisisobutyronitrile 0.05 part

  After the air in the polymerization tank was replaced with nitrogen gas, the reaction was started at a reflux temperature in a nitrogen atmosphere while stirring. When the reaction started, dropping of the mixture of the acrylic monomer, the polymerization initiator and the organic solvent was started from the dropping device. After completion of the dropwise addition over 1 hour, the mixture was aged for 8 hours with further stirring. After completion of the reaction, 167 parts of toluene was added and cooled to room temperature to obtain a transparent solution of an acrylic copolymer (solid content: about 30%).

(Synthesis Example 2)
The composition of the acrylic monomer used in Synthesis Example 1 was changed, and charged into the polymerization tank and the dropping device at the following ratios respectively. Otherwise, polymerization was performed in the same manner as in Synthesis Example 1, and the acrylic copolymer was obtained. A clear solution containing was obtained.
[Polymerization tank]
N-butyl acrylate 31.5 parts methyl methacrylate 15 parts 2-hydroxyethyl acrylate 2.0 parts acrylic acid 1.5 parts ethyl acetate 30 parts 2,2′-azobisisobutyronitrile 0.05 part [ Dripping device]
N-butyl acrylate 31.5 parts methyl methacrylate 15 parts 2-hydroxyethyl acrylate 2.0 parts acrylic acid 1.5 parts ethyl acetate 36 parts 2,2'-azobisisobutyronitrile 0.05 part

(Synthesis Example 3)
The composition of the acrylic monomer used in Synthesis Example 1 was changed, and charged into the polymerization tank and the dropping device at the following ratios respectively. Otherwise, polymerization was performed in the same manner as in Synthesis Example 1, and the acrylic copolymer was obtained. A clear solution containing was obtained.
[Polymerization tank]
N-butyl acrylate 37.5 parts methyl acrylate 11.5 parts 2-hydroxyethyl acrylate 1.0 part ethyl acetate 30 parts 2,2′-azobisisobutyronitrile 0.05 part [drip apparatus]
N-butyl acrylate 37.5 parts methyl acrylate 11.5 parts 2-hydroxyethyl acrylate 1.0 part ethyl acetate 36 parts 2,2'-azobisisobutyronitrile 0.05 part

  For the acrylic copolymer (A) solutions obtained from Synthesis Examples 1 to 3, the solution appearance, nonvolatile content concentration, solution viscosity, and weight average molecular weight were determined according to the following methods, and the results are shown in Table 1.

<< Solution appearance >>
The appearance of the solution of each copolymer obtained in each synthesis example was visually evaluated.

<Measurement of non-volatile content>
About 1 g of each copolymer solution obtained in each synthesis example was weighed into a metal container, dried in an oven at 150 ° C. for 20 minutes, the residue was weighed, and the remaining rate was calculated, and the non-volatile content concentration (%) Was calculated.

<< Measurement of solution viscosity >>
Each copolymer solution obtained in each synthesis example was measured at 23 ° C. with a B-type viscometer (manufactured by Tokyo Keiki Co., Ltd.) using a # 3 rotor under the conditions of 12 rpm and 1 minute rotation. (MPa · s).

<< Measurement of weight average molecular weight (Mw) >>
For the measurement, GPC (gel permeation chromatography) “Shodex GPC System-21” manufactured by Showa Denko KK was used. GPC is liquid chromatography that separates and quantifies substances dissolved in a solvent based on the difference in molecular size, and the weight average molecular weight (Mw) is determined in terms of polystyrene.

Example 1
Tris-2,4,6- (1-aziridinyl) -1,3,5-triazine (hereinafter referred to as “reactive compound (B)” with respect to 100 parts of the copolymer solution obtained in Synthesis Example 1. 0.06 parts of TAT ”) and 2-cyano-N-dodecyl-4-ethyl-2-pyrrolidini which is a kind of pyrrolidine-amide type ultraviolet absorber (c1) represented by the general formula (I) 0.5 part of redenebutenamide (hereinafter referred to as “CNEPA”) and 4-tert-butyl-4′-methoxydibenzoylmethane (hereinafter referred to as “BMDBM”) which is a kind of other ultraviolet absorber (c3) And 0.1 part of tris (2,4-di-tert) -butylphenyl) phosphite (hereinafter referred to as “TBPP”) as an antioxidant (d1) UV blocking adhesive It was.

The UV blocking adhesive was applied onto a release-treated polyester film (hereinafter referred to as “release film”) and dried at 100 ° C. for 2 minutes to form an adhesive layer having a thickness of 25 μm.
One side of the antireflection film was brought into contact with the formed pressure-sensitive adhesive layer to obtain a laminate having a configuration of release film / pressure-sensitive adhesive layer / antireflection film.
Next, the obtained laminate was aged (dark reaction) for one week under the condition of a temperature of 23 ° C. and a relative humidity of 50%, and the crosslinking reaction of the pressure-sensitive adhesive layer was advanced to obtain a pressure-sensitive adhesive sheet.

(Comparative Example 1)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 1 except that the pyrrolidine-amide ultraviolet absorber (c1) used in Example 1 was not added.

(Comparative Example 2)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 1 except that the other ultraviolet absorber (c3) used in Example 1 was not added.

(Comparative Example 3)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 1 except that the antioxidant (d1) used in Example 1 was not added.

(Example 2)
Instead of the pyrrolidine-amide-based ultraviolet absorber (c1) represented by the general formula (I) used in Example 1, 2-pyrrolidone-amide-based ultraviolet absorber (c1) represented by the general formula (II) is used as 2-cyano -N-hydroxy-4- (1-ethyl-2-pyrrolidinylidene) -2-sulfonamide (hereinafter referred to as “CNPSA”) is substituted with BMDBM, which is a kind of other ultraviolet absorber (c3), Ultraviolet blocking properties in the same manner as in Example 1 except that 4-di-tert-butyl-6- (5-chlorobenzotriazol-2-yl) phenol (hereinafter referred to as “BTBCP”) was used. An adhesive and an adhesive sheet were obtained.

(Comparative Example 4)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 2 except that the pyrrolidine-amide ultraviolet absorber (c1) used in Example 2 was not added.

(Comparative Example 5)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 2 except that the other ultraviolet absorber (c3) used in Example 2 was not added.

(Comparative Example 6)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 2 except that the antioxidant (d1) used in Example 2 was not added.

(Example 3)
As a reactive compound (B) with respect to 100 parts of the copolymer solution obtained in Synthesis Example 1, 0.06 parts of TAT and a kind of xanthone ultraviolet absorber (c1) represented by the general formula (III) 10-ethyl-2-chloroacridone (hereinafter referred to as “ECNA”), 1.5 parts of BMDBM, which is a kind of other ultraviolet absorber (c3), and light stabilizer (d2) As an example, 0.2 parts of bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate (hereinafter referred to as “TMPSE”) was added and stirred well to obtain an ultraviolet blocking adhesive. In the same manner as in Example 1, a pressure-sensitive adhesive sheet was obtained.

(Comparative Example 7)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 3 except that the xanthone ultraviolet absorber (c2) used in Example 3 was not added.

(Comparative Example 8)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 3 except that the other ultraviolet absorber (c3) used in Example 3 was not added.

(Comparative Example 9)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 3 except that the light stabilizer (d2) used in Example 3 was not added.

(Examples 4 and 5)
Instead of the xanthone-based ultraviolet absorber (c2) represented by the general formula (III) used in Example 3, 2,4-diisopropylxanthone (hereinafter referred to as “DIPS”) represented by the general formula (IV) (implementation) Example 4), 2,5-dichlorothioxanthone represented by general formula (V) (hereinafter referred to as “DCSS”) (Example 5), and BMDBM which is a kind of other ultraviolet absorber (c3) Instead of BTBCP, an ultraviolet blocking adhesive was obtained in the same manner as in Example 3 except that BTBCP was used, and an adhesive sheet was obtained in the same manner as in Example 1.

(Comparative Example 10)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Example 4 except that the xanthone-based ultraviolet absorber (c2) used in Example 4 was not added.

(Comparative Examples 11 and 13)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Examples 4 and 5, respectively, except that the other ultraviolet absorbent (c3) used in Examples 4 and 5 was not added.

(Comparative Examples 12 and 14)
A pressure-sensitive adhesive and a pressure-sensitive adhesive sheet were obtained in the same manner as in Examples 4 and 5 except that the light stabilizer (d2) used in Examples 4 and 5 was not added.

(Examples 6 and 8)
Instead of the copolymer solution obtained in Synthesis Example 1 used in Example 2, the copolymer solution obtained in Synthesis Example 2 was used as Example 6 and the copolymer solution obtained in Synthesis Example 3 was used. (Example 8), respectively, except that a trimethylolpropane adduct of tolylene diisocyanate (hereinafter referred to as “TDI / TMP”) was used instead of TAT as the reactive compound (B). Obtained an ultraviolet blocking adhesive and an adhesive sheet in the same manner as in Example 2.

(Examples 7 and 9)
Instead of the copolymer solution obtained in Synthesis Example 1 used in Example 4, the copolymer solution obtained in Synthesis Example 2 was used (Example 7), and the copolymer solution obtained in Synthesis Example 3 was used. (Example 9) and UV-blocking pressure-sensitive adhesive and pressure-sensitive adhesive sheet in the same manner as in Example 4 except that TDI / TMP was used instead of TAT as the reactive compound (B). Got.

(Example 10)
For 100 parts of the copolymer solution obtained in Synthesis Example 1, 0.06 parts of TAT as the reactive compound (B) and as the pyrrolidine-amide ultraviolet absorber (c1) represented by the general formula (I) 0.5 parts CNEPA, 2.0 parts ECNA as xanthone ultraviolet absorber (c2) represented by formula (III), 1.0 part BMDBM as other ultraviolet absorber (c3), antioxidant Add 0.1 part of TBPP as (d1) and 0.3 part of TMPSE as light stabilizer (d2) and stir well to obtain a UV-blocking adhesive. In the same manner as in Example 1, an adhesive sheet is obtained. It was.

  Table 2 shows the blending ratio of the pressure-sensitive adhesives obtained in Examples and Comparative Examples. Moreover, about the obtained adhesive sheet, according to the method mentioned later, durability (resistance to heat, durability against moisture), UV blocking property (initial, resistance to heat, durability against moisture), haze The results are shown in Table 2.

《Durability of sticking performance (resistance to heat, durability to moisture)》
The pressure-sensitive adhesive sheet was cut into a size of 150 mm × 80 mm, the release film was peeled off, and each was stuck to both surfaces of a 1.1 mm thick float glass plate using a laminator.
Subsequently, the glass plate on which the antireflection film was adhered was held in an autoclave at 50 ° C. and 5 atm for 20 minutes to adhere the antireflection film to the glass plate.
Further, the laminate of the antireflection film and the glass plate was allowed to stand for 1000 hours in an environment of 120 ° C. or 1000 hours in an environment of 80 ° C. and a relative humidity of 90%. The presence or absence of was visually observed and evaluated in three stages.
○: “No floating or peeling is observed”
Δ: “Slightly floating or peeling is recognized, but there is no practical problem”
×: “There are floating and peeling on the entire surface, and it is not practical.”

《Durability of UV shielding ability (resistance to heat, durability to moisture)》
A sample having the same structure as the sample for durability evaluation of the above-mentioned sticking performance, that is, a sample of “antireflection film / adhesive layer / float glass / adhesive layer / antireflection film” was obtained, and initially in an environment of 120 ° C. After being left for 1000 hours or after being left for 1000 hours in an environment of 80 ° C. and 90% relative humidity, the UV shielding ability of each wavelength of 420 nm or less is “Ubest V-570” under the conditions of 23 ° C. and 50% relative humidity ( (Manufactured by JASCO Corporation) and evaluated in three stages.
○: “A cut rate of ultraviolet rays having a wavelength of 420 nm or less is 100%, and there is no practical problem.”
Δ: “Cutting of ultraviolet rays having a wavelength of 420 nm or less is a rate of 95% or more and less than 100%, which is problematic in practical use.”
X: “The cut rate of ultraviolet rays having a wavelength of 420 nm or less is less than 95%, which is impractical.”

<< Evaluation Method of Optical Properties (Haze) >>
The pressure-sensitive adhesive obtained in each Example and Comparative Example was applied to a release-treated polyester film and dried at 100 ° C. for 2 minutes. After a pressure-sensitive adhesive layer having a thickness of 25 μm was provided, the release treatment was further performed. Covered with a polyester film. After aging the pressure-sensitive adhesive layer sandwiched between the release-treated polyester films at a temperature of 23 ° C. and a relative humidity of 50% for one week, both the release-treated polyester films were removed, and the appearance of the pressure-sensitive adhesive layer itself was visually determined. Furthermore, the haze was measured with “NDH-300A” [manufactured by Nippon Denshoku Industries Co., Ltd.].
○: “No problem in practical use. Haze: less than 1”
Δ: “No cloudiness is observed. Haze: 1 or more and less than 3.”
X: “Slightly cloudy is recognized and there is a problem in practical use. Haze: 3 or more.”

It is a schematic diagram which shows an example of a structure of the organic EL member by which an ultraviolet-blocking adhesive layer is provided.

It is a schematic diagram which shows an example of a structure of the LED member by which an ultraviolet-blocking adhesive layer is provided.

Explanation of symbols

1: Organic EL element 2: Glass layer 3: UV blocking adhesive layer 4: Polyester film 5: Hard coat layer for protecting polyester film 6: Light emitting diode (LED) element 7: Acrylic resin layer or glass layer 8: Acrylic resin Layer or glass layer

Claims (14)

Acrylic copolymer having hydroxyl group and / or (anhydrous) carboxylic acid group (A), reactive compound (B) capable of reacting with at least one of hydroxyl group and (anhydrous) carboxylic acid group, pyrrolidine-amide UV absorption UV absorbers other than at least one of the agent (c1) and the xanthone-based UV absorber (c2) and the UV absorbers (c1) and (c2), which can absorb UV light having a wavelength of 380 nm or less. An ultraviolet blocking resin composition comprising an absorber (c3) and further containing at least one of an antioxidant (d1) and a light stabilizer (d2). The ultraviolet blocking resin composition according to claim 1, wherein the pyrrolidine-amide ultraviolet absorber (c1) is a compound represented by the following general formula (I) or (II).

[In General Formulas (I) and (II), R _{1 to} R ₂ are each independently H, OH group, alkylamino group, acylamino group, arylamino group, halogen, cyano group, or C1-C26. It is any one selected from linear, branched or alicyclic hydrocarbon groups and polyoxyalkylene groups having 2 to 3 carbon atoms, and R ₁ is a cyclic hydrocarbon which may contain a hetero atom. It may be a group. ] The xanthone-based ultraviolet absorber (c2) is a compound represented by any one of the following general formulas (III) to (V), The ultraviolet blocking resin composition according to claim 1 or 2.

[In General Formulas (III) to (V), R _{3 to} R ₁₁ are each independently H, OH group, alkylamino group, acylamino group, arylamino group, halogen, cyano group, or C1 to C26. It is any one selected from a linear, branched or alicyclic hydrocarbon group and a polyoxyalkylene group having 2 to 3 carbon atoms, and R ₁₁ is a cyclic hydrocarbon group which may contain a hetero atom. There may be. ] The ultraviolet blocking resin composition according to any one of claims 1 to 3, wherein the antioxidant (d1) is any one of a phenolic compound, a phosphorous compound, and a sulfur compound. The ultraviolet light blocking resin composition according to any one of claims 1 to 4, wherein the light stabilizer (d2) is a hindered amine compound. 0.001 to 10 parts by weight of pyrrolidine-amide ultraviolet absorber (c1) and / or 0.001 to 10 parts of xanthone ultraviolet absorber (c2) with respect to 100 parts by weight of the acrylic copolymer (A). The ultraviolet blocking resin composition according to any one of claims 1 to 5, further comprising 0.001 to 10 parts by weight of another ultraviolet absorber (c3). The ultraviolet blocking resin composition according to any one of claims 1 to 6, comprising 0.01 to 20 parts by weight of the reactive compound (B) with respect to 100 parts by weight of the acrylic copolymer (A). object. The antioxidant (d1) or the light stabilizer (d2) is contained in an amount of 0.001 to 10 parts by weight based on 100 parts by weight of the acrylic copolymer (A). The ultraviolet blocking resin composition according to any one of 7 to 7. The ultraviolet blocking resin composition according to any one of claims 1 to 8, wherein the acrylic copolymer (A) is an acrylic copolymer (A1) having a glass transition temperature of -80 to 0 ° C. . The ultraviolet blocking resin composition according to claim 1, which is an ultraviolet blocking adhesive. A sheet obtained by peeling treatment is laminated on one surface of the ultraviolet blocking adhesive layer formed from the ultraviolet blocking adhesive according to claim 10, and a plastic group is formed on the other surface of the ultraviolet blocking adhesive layer. A UV-blocking pressure-sensitive adhesive sheet comprising a laminate of a material film or a release-treated sheet. An organic electroluminescence cell comprising an ultraviolet light shielding resin composition layer formed from the ultraviolet light shielding resin composition according to any one of claims 1 to 9, supported on a surface of an organic electroluminescence glass member. Materials. An organic electroluminescence cell member comprising: an organic electroluminescence glass member; an ultraviolet blocking adhesive layer formed from the ultraviolet blocking adhesive according to claim 10; and a plastic base film. . Peel off the sheet that has been peeled off from the ultraviolet blocking adhesive sheet according to claim 11, and stick the plastic substrate film to the glass member for organic electroluminescence through the exposed ultraviolet blocking adhesive layer,
Alternatively, one of the sheets peeled from the ultraviolet blocking adhesive sheet according to claim 11 is peeled off, a plastic base film is laminated on the exposed ultraviolet blocking adhesive layer, and then the remaining peeling treatment is performed. Or peel off the sheet and stick the plastic substrate film to the glass member for organic electroluminescence through the exposed UV blocking adhesive layer,
Alternatively, one of the sheets subjected to the release treatment from the ultraviolet blocking adhesive sheet according to claim 11 is peeled off, and an organic electroluminescence glass member is laminated on the exposed ultraviolet blocking adhesive layer, and then the remaining release treatment is performed. The sheet is peeled off, and a plastic base film is laminated on the exposed UV blocking adhesive layer,
The manufacturing method of the member for organic electroluminescent cells.

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