TW200406476A - Adhesive composition for optical element and adhesive sheet for optical element using the same - Google Patents

Abstract

The present invention provides an acrylic adhesive composition for optical element and adhesive sheets for optical element using the same. The adhesive composition of the present invention not only satisfies the transparency, light resistance and weatherability, but also without discoloration during elapse and with short aging time after platting (adhesive processing). The adhesive composition according to the invention is composed of the copolymer of monomer compound comprising (b) 0.1 ~ 10 parts by weight of monomer containing intramolecular hydroxy group and (c) 0.05 ~ 3 parts by weight of functional monomer containing any one of intramolecular carboxy group, amido group and amine group for (a) (meth)acrylic acid alkyl ester 100 parts by weight, and of 100 aprts by weight of acrylic polymer with weight average molecular weight higher than 500000 and lower than 2000000 based on GPC (gel-permeation chromatography), and of 0.01~5 parts by weight of cross linking agent of polyol modified xylylene diisocyanate. The tackified sheets for optical use locate on the one-side or two side of support using the adhesive composition for optical element to form the adhesive layer.

Description

200406476 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to an adhesive composition for an optical element requiring transparency and an adhesive sheet for an optical element using the adhesive composition. Adhesives for optical elements of specific acrylic baking copolymers and specific isocyanate-based hardeners, and optical elements in which a spotting agent layer using the adhesive composition is provided on one or both sides of a carrier Those who use adhesive films. '' [Prior art] Flat panel display (FPD) such as liquid crystal display (LCD) and plasma display (PDp) are display devices used in various fields. In these display devices, a protective film for preventing reflection from an external light source and a protective film for preventing abrasion of a display device are often used. In addition, 'cathode ray tubes (CRT) and FPDs are not only used as display devices :: These surfaces can also be used as input devices after they are equipped with touch screens. A read-proof, anti-reflection film, and a vapor-deposited resin film are also used on the touch panel. = The film is used with an adhesive (sensing agent), which requires local transparency and high durability. # ^ ^ M is mainly used as the adhesive seeker. Especially in LCD, "P", "fr", he also uses acrylic adhesives in the k of the laminated polarizing plate or retardation plate. Acrylic resin adhesives are mostly composed of alkyl lambda Φ Shiba $ < rabbit number of 1 to 20 alkyl acrylate as the main component, and then add acrylic acid, etc., the amount of soap and the copolymerizable heart The propylene based on the copolymerization of early moon beans is a cross-linking agent based on the 3r 〃 I complex, which has more than two ㈣ propylene-based polymers in the molecule, < g 旎 -based reactive organic group 314956 200406476, And depending on the situation, such as tackifying resin. The properties are produced by appropriately selecting the single-body formulation of the propylene-based polymer, the eighth amount of the propylene-based polymer, the sub-quantity distribution, the cross-linking agent, and the tackifying resin. Ui and other cross-linking agents that adhere to this propylene-based adhesive are known as isocyanate compounds, strict compounds, aminated compounds, ethyleneimine compounds, melamine: compounds: oxygen, and metal chelation. Among them, the adhesion feeling of the adhesive after the one-shot reaction of the isocyanate compound and the adhesion to the adherend = Fujihiro is used. -Excellent testability. However, using isocyanuric acid compounds as crosslinker agents, compared with acrylic adhesives using other crosslinkers, the crosslinker 2 carbamate structure makes light resistance, The aging time of the transparent amine composition becomes longer. If Niu Fang ::,: 'adhesive is used, the obtained adhesive is easy to yellow, and == acid monocyanate compound is easy to whiten. 9% ^ ^ Among them, "Representation of Japanese Patent Laid-Open No. 24-The reaction product of a compound and a polyhydric alcohol, = = = isocyanuric acid bonded to a tertiary carbon atom of polyisosulphuric acid. / / T group of propylene and androxy The stomach composition composed of the copolymer is a suitable pharmaceutical composition which satisfies the private content, which has a < pot life, and is different from cold. However, the weather resistance and transparency of the spotted nz soil are both excellent. The adhesion performance is as follows:-* 'The cross-linking reaction is slow after the rough battle, and the time-consuming demand of the clever daughter-in-law has increased the productivity. And 3, so that it cannot meet the city's 314956 200406476. The class of the present invention "provides a not only bipedal transparency, light resistance and weather resistance, and does not pan I over time, θ _ ^ ^ ^ ^ coating ( Adhesive processing) After the maturation day is short, the acrylic photon element is also used for adhesion. ^ Adhesive composition of the optical adhesive sheet. 'And use. Hai [Inventive content] The method of solving the problem in the afternoon: 100 parts by weight of an adhesive sword (a) (fluorenyl) alkyl acrylate for optical elements, which is a unitary body having a hydroxyl group in a monolayer component, 0.1 to 10 wt. The internal weight base, "base and amine groups" and the single body component ⑷ to 3 parts by weight of the single body mixture ... T single body decantation analysis method has a weight average molecular weight of 5,000. Bu: Department It is composed of 100 parts by weight of gel permeation layer polymer and polyol-modified benzene ◎ from 0.01 to 5 parts by weight, and is a crosslinker of soil-isocyanate: > In addition, the above solution polymerization or block polymerization is better. Leyong 5 The optical adhesive sheet is on one side of the carrier or is formed from the above-mentioned adhesive component for optical elements: 'shape [Embodiment], then the agent layer is formed. The best of this book Monomer body of propylene monomer used in the adhesive ⑷ (Meth) acrylic wheel 100 parts by weight of two 5 system body body components (b) Monobody body with hydroxyl groups in the molecule 01 to 1 contains body body components ⑷ There is a retarding group in the molecule, and the amine group and the amine group are of any weight :: a copolymer of a single unit with a single unit of 0.05 to a species of B energy group to J parts by weight. 3 Η 956 200406476 single unit Examples of the unit component of the mixture (a) alkyl alkyl ((fluorenyl) acrylate) are as follows: (fluorenyl) fluorenyl acrylate, (fluorenyl) ethyl acrylate, (fluorenyl) propyl acrylate, (fluorenyl) N-butyl acrylate, (butyl) isobutyl acrylate, (butyl) tert-butyl acrylate, (ethyl) 2-ethylhexyl acrylate, (butyl) octyl acrylate, ( (Fluorenyl) isooctyl acrylate, (fluorenyl) dodecane acrylate, (fluorenyl) stearyl acrylate, etc. (fluorenyl) acryl refers to There are two meanings of enoic acid and fluorenyl acrylic acid, and (fluorenyl) acrylate refers to two kinds of acrylate and fluorenyl acrylate. The singular component of the singular mixture (b) the monomer with a radical in the molecule Examples of the measuring body include hydroxyethyl (fluorenyl) acrylate, hydroxybutyl (fluorenyl) acrylate, 2-hydroxypropyl (fluorenyl) acrylate, hydroxybutyl (fluorenyl) acrylate, and (fluorenyl) ) 6-Hexyl hexyl acrylate, (fluorenyl) acrylic acid 丨, cardiac cyclohexanedifluorenyl monoester, chloro-2-hydroxypropyl acrylate, diethylene glycol (meth) acrylate monoester, propyl alcohol Wait.

Examples of monomer components of early 1-body mixtures (c) Monomers having any one of a carboxyl group and a sulfonylamino group in the molecule can be exemplified by (fluorenyl) acrylic acid, (meth) acrylic acid 2- Carboxylacetate, 3- (hydroxy) acrylic acid 3-hydroxypropanol I (meth) acrylic acid 4-metabutanol, itaconic acid, crotonic acid, maleic acid, fumaric acid, and maleic acid needles Monomers; (meth) acrylamide, n, n_dimethyl (fluorenyl) acryl I! Amine, N_isopropyl (fluorenyl) acrylamine, n, n.diethyl ( (Methyl) acrylamine, acryl morpholine, isovinyl ethoxyamine, dipropyl '(meth) acrylamine, N, N-dimethylamine propyl (methyl) Monomers containing fermented amine groups such as methylpyrrolidone, hydroxymethyl (meth) acrylamide, methoxyethyl (meth) propionate; (fluorenyl) acrylic acid M 314956 8 200406476 dimethylaminoethyl Vinegar, N, N-diethylaminoethyl (f) acrylamine, n-dimethylaminopropyl (meth) acrylamide, (meth) acrylic monoamine-containing single body, etc. . The monobasic component of the unit of the monomer, fluorene group, gi amine group, and amine group—a functional group of a single unit functional group, when the diffusion film, anti-reflection film, anti-glass scattering film, etc. are exposed to ultraviolet rays, Amine-based and amine-based are preferred, and for polarizers and retardation plates used in LCDs, retarder is preferred. The blending amount of the measuring body mixture is 1 replacement part per unit body component (), and the unit body component (b) is more than 0 parts by weight and less than 0 parts by weight, and the unit body component 0) is 0.05 weight. Above 3 parts by weight. However, it is more preferable that the component (1) is 100 parts by weight, and the component (2) is 2 parts by weight or more and 5 parts by weight or less. Limiting the single body composition 体 to (c) within this value range: The following polyols are modified! -甲 其 — 田 〆, speed up. A cross-linking reaction of "methyl-μ㈣" will be added to the above-mentioned single-volume mixture, and other single-denier: ⑷ may be mixed as required. Examples of other early masses can be listed as: (fluorenyl) propionate ethoxyethyl ^ and (f-based) propionate ethoxy ethoxylate and other (fluorenyl) propionate sulphuric acid burn sl; (Fluorenyl) glycidyl acrylic acid and other epoxy-containing (fluorenyl) acrylic II methyl) acrylic acid ethyl alcohol oxyacetic acid ethyl alcohol and other ethyl alcohol-containing ethyl acetate; styrene ethyl alcohol, Methyl styrene, ethyl benzene, benzene, and other aromatic compounds: monomers; methacrylic propyloxypropyl methylox'acetic acid, ethyl acetate, and (meth) acrylonitrile. Mixture of other single-quantity components (a) Alkyl acrylate 10T, which is known to be 50 parts by weight or less, 314956 9 200406476 is preferably 30 parts by weight or less, especially 10 parts by weight or less The adhesive polymer used in the adhesive composition for the prior element of the present invention can be obtained from the above-mentioned singular body mixture: the above-mentioned acrylic method, emulsion polymerization method, suspension polymerization method, etc.-general: broad block polymerization, T force It is also known that the method of the second party is to make potassium, but it is better to use a solution that does not contain polymerization stabilizers such as emulsifiers and suspending agents to polymerize the two, and to use a block polymerization method. In addition, the weight average molecular weight (Mw) measured by the above acrylic polychromatographic chromatography (GPC) is from 500,000 to 2 million, and preferably from 600,000 to 1.8 million. When the MW is less than 500,000, its adhesion property is insufficient. If the Mw exceeds 2 million days, the follow-up ability of the carrier (substrate) to expand and contract will be deteriorated, and conditions such as peeling from the adherend will easily occur. The reaction product. Customer; ^ examples of urethane alcohols In addition to ethylene glycol, polypropylene ^ i, 2-propanediol, benzene-one-moon-light-moisture-coated-component-adhesive-composition for the use of polyalcohols, formazan Isocyanate, xylylene diisocyanate and polyol alcohol, diethylene glycol, polyethylene glycol, butanediol, 廄 吝 仏 Λ_ quaternary alcohol, pentaerythritol, trimethylolpropane, hexanediol, hexamethylene In addition to alcohols, etc., _ di t τ 丨 『'^ ^ can also be listed as ... polyether polyols or polyester polyols, enols, poly-polyenols, polyisoprene polyols Alcohol and so on. It is also based on the addition of 3 moles of trimethylol dicarboxate to 1 mole of one to two methyl propane ^, " N-propane modified phenylenediyl diisocyanate as a plant. μ 14 Propylene-based polymer is mixed with the above-mentioned polyol modified xylylene diisocyanate, and ^ is produced. When the above-mentioned propylene-based polymer is prepared by solution polymerization, it is diluted at the end of polymerization. Isocyanate brewing is added to the polymer solution. When the above-mentioned acrylic furnace < take, towel, etc. compound is prepared by block polymerization, it is difficult to mix uniformly for eight days because the polymerization ends 314956 200406476. The above-mentioned propylene polymer and the above-mentioned _ *, ',,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,-,-,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, and the properties of the propylene-based polymers are modified from propylene: methyl … Polyol modified xylylene & substance 1 ⑽ replacement parts, mixed poly is preferably 0.05 parts by weight. ^ Is i, and it is also in the optical element of the present invention and the effect of the present invention ^ ^ ^ If you do not know, you can also be equipped with organic silane coupling agent, antioxidant, ultraviolet absorber, tackifier, plasticizer, etc. . Anti-milk A: The adhesive sheet for optical elements of the invention is formed on one side or both sides of the carrier, and there is a spotting layer composed of the adhesive composition for optical elements. The adhesive layer can be provided in a conventional manner. Examples of the carrier include: a polarizing film, a retardation film, an elliptical polarizing film, an anti-reflection film, a brightness-improving film, a light diffusion film, preventing glass from flying, and protecting a surface film. Example:

The present invention will be described more specifically by showing examples, but the present invention is not limited to these examples.

< Manufacturing Example 1 > The propylene-based polymer solution A was composed of 100 parts by weight of n-butyl acrylate, 4 parts by weight of 2-hydroxyethyl acrylate, 0.5 parts by weight of acrylic acid, 90 parts by weight of ethyl acetate, and peroxide. · 0.1 parts by weight was added to the reaction tank, and the air in the reaction tank was replaced with nitrogen. Then, the temperature was raised to 70 ° C with stirring, and the reaction was performed for 8 hours to obtain an acrylic polymer solution A. The M \ v of the obtained propylene polymer A measured by gel liquid chromatography (GP C) was 12,000,000. < Production Example 2 > propylene polymer solution b 3] 4956 200406476 100 parts by weight of n-butyl acrylate, 2 parts by weight of 2-hydroxyethyl acrylate, 1 part by weight of acrylamide, and 100 parts by weight of ethyl acetate And 0.2 part by weight of azobisisobutyronitrile was added to the reaction tank, and the air in the reaction tank was replaced with nitrogen. Then, the temperature was raised to 60 ° C. with stirring to react for 4 hours. After 4 hours, 1000 parts by weight of toluene, 5 parts by weight of α-fluorenylstyrene dimer, and 2 parts by weight of azobisisobutyronitrile were added, and the temperature was raised to 90 ° C for 4 hours to obtain propylene polymerization.物 溶液 B。 Solution B. The Mw of the obtained propylene polymer B measured by GPC was 700,000.

< Production Example 3 > The propylene-based polymer solution C made 100 parts by weight of 2-ethylhexyl acrylate, 0.5 parts by weight of 4-hydroxybutyl acrylate, 2.5 parts by weight of acrylamide, 90 parts by weight of ethyl acetate, and 0.07 parts by weight of phenylhydrazone is added to the reaction tank, and the air in the reaction tank is replaced with nitrogen. Then, the temperature was raised to 73 ° C with stirring, and the reaction was performed for 8 hours to obtain a propylene-based polymer solution C. The Mw of the obtained propylene polymer C measured by GPC was 1.4 million.

< Production Example 4 > Propylene polymer solution D In Production Example 1, except that acrylic acid was changed to 4 parts by weight, a propylene polymer solution D was obtained by reacting as in Production Example 1. The Mw of the obtained propylene polymer D measured by GPC was 1.3 million.

< Production Example 5 > Propylene-based polymer solution E In Production Example 1, except that acrylic acid was removed, the reaction was performed in the same manner as in Production Example 1 to obtain a propylene-based polymer solution E. The Mw of the obtained propylene polymer E measured by GPC was 1.2 million.

< Production example 6 > propylene-based polymer solution F 314956 200406476

In Production Example 1, except that 2-hydroxyethyl acrylate was changed to 0.05 parts by weight, a reaction was performed as in Production Example 1 to obtain a propylene-based polymer solution F. The Mw of the obtained propylene-based polymer F measured by GPC was 1.1 million. &lt; Production Example 7 &gt; Propylene polymer solution G In Production Example 1, except that 2-hydroxyethyl acrylate was changed to 12 parts by weight, a propylene polymer solution G was obtained by reacting as in Production Example 1. The Mw of the obtained propylene polymer G measured by GPC was 1.4 million. &lt; Production Example 8 &gt; Propylene-based polymer solution Η In Production Example 1, except that 90 parts by weight of ethyl acetate was changed to 10 parts by weight of ethyl acetate and 80 parts by weight of toluene, the reaction was the same as in Production Example 1. Thus, a propylene-based polymer solution Η was obtained. The Mw of the obtained propylene polymer Η measured by GPC was 300,000. &lt; Manufacturing Example 9 &gt; The first step of producing a propylene polymer by block polymerization was to add 100 parts by weight of 2-hydroxyhexyl acrylate, 2 parts by weight of 2-hydroxyethyl acrylate, and 1 part by weight of diethylamine acrylate. After the air in the reaction tank was replaced with nitrogen in the reaction tank, the temperature was raised to 50 ° C. with stirring. Next, when 0.025 parts by weight of azo (4-methoxyoxyfluorenylvaleronitrile) is added, the temperature of the upper reaction system rises, and when the polymerization reaction proceeds without cooling, the reaction system temperature reaches 1 19 ° C. After slowly cooling down. 20 parts by weight of acrylic acid 2-ethylhexyl vinegar, 0.4 parts by weight of acrylic acid 2-0.2 parts by weight of diethylaminoethyl acryl, and the reaction temperature was reduced to 110 ° C , And then cooled to room temperature with a water bath to obtain an acrylic polymer. Next, in the second step, 100 parts by weight of the propylene-based polymer] 3 314956 200406476 'add a photopolymerization initiator (trade name: DAROCUR 1 173, manufactured by Cibaci · Co., Ltd.) 0.3 parts by weight, Stir well to obtain a polymerizable composition. This was coated on a polyester film subjected to a peeling treatment, and irradiated with a high-pressure mercury lamp at 10 W / m2 for 36 seconds under a nitrogen atmosphere, and then photopolymerized by irradiation at 3,000 w / m2 for 45 seconds. A propylene polymer layer is provided. The Mw of the propylene-based polymer layer measured by GPC was 50,000. GPC measurement conditions are shown in Table 1. [Table 1] Table 1 (GPC measurement conditions) Device name: Tosoh Co., Ltd. HLC-812〇 column Tosoh Co., Ltd .: G7000HXL 7.8mmID X 3 0 cm 1 GMHXL 7.8mmID X 3 0cm 2 G2 0 0 0HXL 7.8mmIDx3 0cm 1 sample concentration: diluted with tetrahydrofuran to 15mg / cm3 mobile phase solvent: tetrahydro [] furan flow: 1.0cm3 / min column temperature: 40 ° C &lt; Example 1 &gt; To 1,000 parts by weight of the solid content of the propylene polymer solution A, 0.05 part by weight of the fluorene phenylene diisocyanate addition agent of fluorenylpropane was added, and the mixture was stirred thoroughly The adhesive composition was obtained. This was coated on a polyester film subjected to a peeling treatment and dried to form an adhesive layer of 2 5 "m. Then, it was transcribed on one side of a polarizing film and subjected to a temperature of 23.0 and a humidity of 65%. Maturation. 314956 &lt; Exemplary Example 2 &gt; Adding methylpropane to three times of solid solution to the polymer of the cyanine-based polymer "1. . Among the parts by weight, add and stir to obtain the igniting agent plant, which is 0.7 parts by weight, fully stirred to dry and shape; This was coated on one side of the dirty surface treated with ionization, and the coating layer was heated at a temperature, and then it was transferred to a polarizing film for "Example 3" and matured at 65%. Triene polymer To 100 parts by weight of the solid content of the solution, 0.1 parts by weight of methacrylate diisocyanate additive was added, and the mixture was mixed to obtain an adhesive composition. This was coated on a peeled polyacetate. After drying, a 25-m adhesive layer was formed, which was transcribed onto one side of a polarizing film, and matured under the conditions of a temperature of 2rc and a humidity of 65%. <Example 4 &gt; In Production Example 9, Except that the polymerizable composition in the second step was added to the toluene-based diisocyanate addition of trimethylolpropane in an amount of 0.5 parts by weight relative to 100 parts by weight of the propylene-based partial polymer, the procedure was the same as in Production Example 9. An adhesive film layer of 25 m was obtained on the polyester film after the peeling treatment. The film was transcribed on one side of a polarized amine and matured at a temperature of 23 ° C and a humidity of 65%. &Lt; Comparative Example 1 &gt; In Example 1, except that the propylene polymer solution A was changed to the acrylic polymer solution Dye Others are the same as those in Example 1. First <Comparative Example 2> In Example], except that the propylene-based polymer solution A was changed to propylene 3/4956 200406476 olefin-based polymer solution E, the other was the same as in Example 1. & lt Comparative Example 3 &gt; In Example 1, except that the propylene-based polymer solution A was changed to a propylene-based polymer solution F, it was the same as in Example 1. <Comparative Example 4> In Example 1, except that propylene was changed Except that the polymer solution A was changed to the propylene polymer solution G, the procedure was the same as in Example 1. &lt; Comparative Example 5 &gt; In Example 1, the propylene polymer solution A was changed to a propylene polymer solution. Other than that, it is the same as in Example 1. <Comparative Example 6> In Example 1, except that the benzodiamidyl diisocyanate additive of trihydroxymethylpropane was changed to 0.001 parts by weight, the other examples were the same as in Example < Comparative Example 7> Example 1 was the same as Example 1 except that the benzodiamidyl diisocyanate additive of trihydroxymethylpropane was changed to 6 parts by weight. <Comparative Example 8> In Example 1, Except that Except that the benzodiamidyl diisocyanate addition of propane was changed to the hexafluorene diisocyanate of trihydroxypropylpropane, the rest was the same as in Example 1. &lt; Comparative Example 9 &gt; In Example 1, except that trihydroxymethylpropane The benzodiamidyl diisocyanate additive was changed to trimethylolpropane, and the phenylene diisocyanate was changed to 314956 200406476, and the others were the same as in Example 1. Evaluation test · ① Gel fraction (gel content): In the coating The gel fraction was measured at 1, 3, 5, 7, 10, and 15 after the adhesive composition was applied. The gel fraction was taken on the carrier at a temperature of 23 ° C and a humidity of 65%. About 0.1 g of the matured adhesive was placed in a sample bottle, and ethyl acetate 3 Oc.c. was added after shaking for 24 hours. The contents of the sample bottle were filtered on a 200-mesh stainless steel metal mesh, and the residue on the metal mesh was dried at 100 ° C for 2 hours, and the dry weight was measured. The results obtained by the following formula are shown in Table 2. . [Formula 1] Gel fraction (%) = (dry weight / adhesive weight) x 100 ····· (I) [Table 2] Gel fraction (%) General application period 1 ~ 3 5 7 7 10 10 15 Example 1 10 36 36 37 37 37 〇 Example 2 5 27 28 28 28 28 〇 Example 3 26 43 44 44 44 44 〇 Example 4 9 31 32 32 33 η 〇〇〇 Comparative Example 1 12 37 43 44 44 44 〇X Comparative Example 2 8 14 23 25 30 34 〇 ◎ Comparative Example 3 0 1 5 8 11 16 〇 ◎ Comparative Example 4 44 68 69 69 69 70 〇〇 Comparative Example 5 2 9 9 10 11 11 〇〇 Comparative Example 6 0 0 0 0 0 0 ○ ◎ Comparative Example 7 44 67 67 80 80 81 〇〇 Comparative Example 8 1] 5 15 38 43 43 △ ◎ Comparative Example 9 6 36 36 42 44 44 X 〇②Yellowing 17 314956 200406476 In the above-mentioned examples 1 to 4, specific ages γ and pregnant examples 1 to 9, 25 m flat film was used instead of polarizing film to make optical elements. ^ Ding Yongqi Occupant film. Will be at temperature 23. (:, The adhesive sheet obtained under a humidity of 65% &amp; 7) was placed in ^ ⑻. After standing in a dry cry for 15 days, the color change was observed with the naked eye. The results are shown in the table: "〇" means no Yellowing, "△" means that you see some slight yellowing, indicating that there is obvious yellowing. "③Applicability period: In Comparative Examples 1 to 9, the obtained viscosity and humidity were observed at 65%. The results are shown in Tables 1 to 4 above. The formulation composition was left to stand at a temperature of 23 ° C. The formulation composition became sticky after preparation. "◎" means more than 12 hours, and "0" means 6 hours or more} 2 hours or less, Γ X "means 6 hours or less. ④ Durability: In the above-mentioned Examples 1 to 4, and Comparative Examples 1 to 9, the obtained adhesive sheet for an optical element was adhered to a laminating machine roller. 0.5mm thick one-sided glass without inspection. Then, the pressure was maintained in a pressure cooker at 50 ° C, 5 atmospheres for 20 minutes to make adhesion. The thus obtained sample was 100 ° C and 60 ° C, 90 ° C. After leaving it for 500 hours under the condition of% RH, the peeling of the optical element and the foaming at the adhesive interface are observed with the naked eye. It is shown in Table 3. "〇" in the table means that there is no problem in practical use, "△" means that there is a possibility of a problem in practical use, and r γ "means that there is a problem in practical use. 18 3J4956 200406476 [Table 3] 100 ° CX 500 hours 60 ° C 90% x 5,000 hours Peeling Foaming Peeling Foaming Example 1 20000 30000 40000 Comparative Example 1 〇〇〇2 〇Δ 〇〇3 〇X 〇Δ 4 Δ 〇XX 5 〇X 〇Δ6 〇X 〇X 7 XXXX 8 〇〇〇〇09 〇〇〇〇 Invention effect: The adhesive for optical elements of the present invention As shown in the above examples, it not only has excellent yellowing prevention properties, but also has a sufficient pot life in industry. Compared with conventional adhesive compositions, the crosslinked structure is completed quickly after coating. The gel fraction is stabilized, and the adhesive characteristics are stable in a short time. Therefore, the adhesive sheet for optical elements of the present invention using the adhesive for optical elements of the present invention can be used quickly after adhesive processing (coating) and greatly Improve productivity.] 9 31495 6

Claims (1)

200406476 The scope of patent application: 1 · An adhesive group for optical elements (aU ψ A product, the valley sign is containing 100% of the (a) alkyl (meth) acrylate) (B) 0.1 to 10 parts by weight of amines in the early S body with a hydroxyl group in the molecule. ^ Knife man (C) Any one of carboxyl, hydrazine and amine groups in the knife. 05 to 3 parts by weight of the copolymer of the early carcass mixture, which is based on the composition of the weight, spin gel permeation chromatography, Chuanxiong Yae $ average molecular weight of 5 million yu on propylene below 2 million 2 10 parts by weight of water δ, and 0.01% by weight or more and 5 parts by weight or less of polyol modified phthalate crosslinker //, such as the scope of patent application f! Adhesive composition, wherein the propylene polymer is obtained by solution polymerization or block polymerization. An adhesive sheet for optical elements is composed of a carrier and an adhesive layer provided on one or both sides of the carrier. The adhesive sheet is composed, and the characteristic of the adhesive layer is 1) 100 parts by weight of alkyl acrylate; 仏) Monomers having hydroxyl groups in the molecule of 0.1 to 10 parts by weight; and (c) having any one of a Wei group, a Si amine group, and an amine group in the molecule A propylene polymer having a weight-average molecular weight of 500,000 to 2 million as measured by gel permeation chromatography composed of a copolymer of a basal amount of OM to 3 parts by weight of a quantum mixture. 〇〇parts by weight, and polyol-modified benzene monofluorenyl diisocyanate cross-linking agent 0.01 to 5 parts by weight of the adhesive composition. 314956 20 200406476 指定 Designated representative map: there is no scheme in this case (1) The designated representative map in this case is: (). (2) Brief description of the element representative symbols of this representative figure: 捌 If there is a chemical formula in this case, please disclose the chemical formula that can best show the characteristics of the invention: 4 314956