201020303 六、發明說明： L發明所眉技術領域】 發明領域 本發明係關於一種用於控制漏光之黏著劑組成物以及 5 塗覆有該組成物之顯示裝置用光學薄膜，特別是，本發明 係關於一種用於控制漏光之黏著劑組成物，該組成物可藉 由緩解該黏著劑之收縮應力而補足漏光性質，且可將因基 材與光學薄膜之黏著劑間大小變化差異所產生之殘餘應力 減至最低’及關於控制塗覆有該組成物之顯示裝置用光學 10 薄膜。 【先前技術3 發明背景 近來，用於光學薄膜之黏著劑已被使用，其要求各種 先進的功能及可靠的耐久性。特別是，用於施加偏光膜於 15使用於液晶元件中的基材上之黏著劑對於其之使用係遭受 逐漸嚴峻之條件。在這樣的條件中，偏光膜的大小會改變， 其可能會導致起泡、剝離或漏光，在較大顯示裝置中此現 象更顯著地存在。用於施加偏光膜至基材上的黏著劑藉由 Μ增加其之分子量或促進交聯效能已被改良，使該黏著劑層 2〇可承受前述之嚴峻條件。然而，因為使用大分子量或促進 交聯效能之黏著劑以使黏著劑層承受嚴峻條件係強迫地抑 光膜與該黏著劑之大小變化，因此抑制大小變化之特 或於特定期間抑制大小變化係可能的。然、而如果該 薄膜係經使用-段長時間，因大小變化而發生的内部應力 201020303 會集中在相對於該偏光膜中央部位的邊緣，以致於LC元件 之邊緣係顯示較其之中央部位明亮，此係典型地意指該漏 光性質。 已公開日本專利案公告第1980-207101號揭示一創新 5的偏光板，該板之至少一側係施加有感壓黏著劑層，該感 壓黏著劑層係由多官能基化合物所製得，該化合物包含： (A)以烷基（甲代）丙烯酸酯為準，具有一反應性官能基之共 聚物；（B)不具官能基之烧基（甲代）丙烯酸酯（共）聚合物； 及（C)藉由反應上述反應性官能基所獲得之至少兩個官能 1〇基，且以重量比1:4至4:1包含上述⑴與。然而，上述 發明中所揭示之偏光板不具有相對於該黏著劑層大小穩定 性之黏著劑層匹配效能。 另外’日本專利案公告第1998-066283號揭示一提供 有一以丙烯酸酯或甲代丙烯酸酯為準之丙烯酸酯聚合物黏 15著劑層的偏光板，該丙婦酸酯或甲代丙婦酸酯具有碳數1 至12之炫基，丙稀酸g曰或甲代丙婦酸醋包含至多π重量％ 之聚合物組份，該聚合物組份之重量平均分子量係不大於 100, 〇〇〇及至少10重量％之聚合物組份，該聚合物組份之重 量平均分子量係等於或大於一百萬。 20 #低分子量聚合物的含量不足，用於偏光板大小變化 之感壓黏著劑層匹配效能係不如想要的那樣大。偏光膜可 承受在特定範圍内發生的内部應力，但於_段長時間中重 複發生之内部應力係集中於偏光板的邊緣，而在液晶元件 表面上產生色斑，如IX元件的邊緣係顯示較中央部份明亮 201020303 或黯淡。相反地，若低分子量聚合物的含量係超過想要的， 用於偏光板大小變化之感壓點著劑層較佳匹配效能係達成 且因長期因素而發生的内部應力係減輕。然而，在這樣的 情形中，會發生各種問題，例如，就切割偏光板而言，黏 5著劑可能會流動而污染偏光板的邊緣，從而導致各種缺 陷。因此’形成-種可以應付偏光板大小變化之黏著劑層 係困難的。 另外，日本專利案公告第199卜12471號揭示使用以丙 • 烯醛基為準之高分子量黏著劑以調整交聯密度及藉此改進 10熱黏著以爲改善的耐久性。然而，在這樣的情形中，因為 高分子量樹脂係被使用且依交聯劑量的不同而發生交聯密 度的嚴重改變，調整分子間交聯密度係非常需要小心處理 的，因而難以一致地控制基材間之應力集中度。 另外，日本專利案公告第1995-301792號揭示一控制 15 黏著劑之經改質的附著的技術以針對LC顯示器面板上非均 勻螢幕的問題，該問題係由在熱及溼度抗性條件下，黏著 • 劑薄膜及玻璃板間的應力密度所引起。然而，儘管有此技 術，要保持特定量之經改質的附著是困難的’例如，依所 使用的黏著劑之不同型式，藉由交聯反應之連續進行將發 20生老化。特別是，當用一共聚物產生黏著劑層時，該共聚 物係由引入一預設量之反應性官能基至一非反應性丙烯酸 主單體，因為非常小量的交聯劑係被使用，有效地控制代 表黏著及附著的交聯結構係困難的。 5 201020303 另外，日本專利案公告帛1996-120238號揭示依附著 的老化及对久生上黏著劑的黏著一使用含有環氧官能基 的酵類之技術以降低薄膜及玻璃板間黏著特徵改變的影 響。然而，做為-用於控制黏著劑之附著及黏著的方法， 5該技術並不具有足夠的可行性以達成均勻的附著及黏著， 且透過該技術以控制附著及黏著係很困難的。因此，其被 視為不夠有效率。即是，因使用於黏著劑之交聯劑主要包 含至少3個反應性官能基，因此黏著劑之分子結構的準確 控制不被輕易完成，因為合成的黏著劑層交聯結構中的 1〇 複雜性。 此外，一種添加募聚體及不包含固化官能基之低分子 量（共）聚合物至聚合共聚物以使黏著劑之收縮應力減至最 低的方法已被典型地使用。如此之方法儘管可以降低收縮 應力’但卻導致黏著劑流體或當切割偏光板時該切割部上 15的污染’而引起可使用性及施加該板至相關產品的嚴重問 題。201020303 VI. Field of the Invention: Field of the Invention The present invention relates to an adhesive composition for controlling light leakage and an optical film for a display device coated with the composition, and in particular, the present invention is Regarding an adhesive composition for controlling light leakage, the composition can complement the light leakage property by alleviating the shrinkage stress of the adhesive, and can be caused by the difference in size between the adhesive of the substrate and the optical film. The stress is minimized' and the optical 10 film for the display device coated with the composition is controlled. [Prior Art 3 Background of the Invention Recently, an adhesive for an optical film has been used, which requires various advanced functions and reliable durability. In particular, the adhesive for applying a polarizing film to a substrate used in a liquid crystal element is subjected to increasingly severe conditions for its use. Under such conditions, the size of the polarizing film may change, which may cause foaming, peeling or light leakage, which is more prominent in larger display devices. The adhesive for applying the polarizing film to the substrate has been improved by increasing the molecular weight thereof or promoting the crosslinking efficiency, so that the adhesive layer 2 can withstand the severe conditions described above. However, since an adhesive having a large molecular weight or promoting cross-linking efficiency is used to subject the adhesive layer to severe conditions to forcibly change the size of the light-reducing film and the adhesive, the size change is suppressed or the size change is suppressed during a specific period. possible. However, if the film is used for a long period of time, the internal stress 201020303 due to the change in size will concentrate on the edge relative to the central portion of the polarizing film, so that the edge of the LC element is brighter than the central portion thereof. This system typically means the light leakage property. Japanese Laid-Open Patent Publication No. 1980-207101 discloses an Innovative 5 polarizing plate having at least one side applied with a pressure-sensitive adhesive layer which is made of a polyfunctional compound. The compound comprises: (A) a copolymer having a reactive functional group based on an alkyl (meth) acrylate; (B) an alkyl (meth) acrylate (co)polymer having no functional group; And (C) at least two functional fluorenyl groups obtained by reacting the above reactive functional groups, and comprising the above (1) and in a weight ratio of 1:4 to 4:1. However, the polarizing plate disclosed in the above invention does not have an adhesive layer matching performance with respect to the size stability of the adhesive layer. In addition, Japanese Patent Publication No. 1998-066283 discloses a polarizing plate having an acrylate polymer adhesive layer based on acrylate or methacrylate, the propyl fumarate or methionate. The ester has a condensate having a carbon number of 1 to 12, and the acrylonitrile or acetoacetate comprises up to π% by weight of the polymer component, and the weight average molecular weight of the polymer component is not more than 100, 〇〇 And at least 10% by weight of the polymer component, the polymer component having a weight average molecular weight of one million or more. The content of the 20 #low molecular weight polymer is insufficient, and the pressure-sensitive adhesive layer matching performance for the change in the size of the polarizing plate is not as large as desired. The polarizing film can withstand the internal stress occurring in a specific range, but the internal stress which is repeated in the long period of time is concentrated on the edge of the polarizing plate, and a color spot is generated on the surface of the liquid crystal element, such as the edge display of the IX element. Brighter than the central part of 201020303 or dim. Conversely, if the content of the low molecular weight polymer exceeds the desired level, the pressure-sensitive adhesive layer for the change in the size of the polarizing plate preferably achieves a matching efficiency and the internal stress is reduced due to long-term factors. However, in such a case, various problems occur, for example, in the case of cutting the polarizing plate, the adhesive may flow to contaminate the edge of the polarizing plate, resulting in various defects. Therefore, it is difficult to form an adhesive layer which can cope with the change in the size of the polarizing plate. Further, Japanese Patent Publication No. 199-242471 discloses the use of a high molecular weight adhesive based on a propylene aldehyde group to adjust the crosslinking density and thereby improve the thermal adhesion of 10 to improve durability. However, in such a case, since the high molecular weight resin is used and the crosslinking density is severely changed depending on the amount of the crosslinking agent, adjusting the intermolecular crosslinking density system requires very careful handling, and thus it is difficult to uniformly control the substrate. Stress concentration between materials. In addition, Japanese Patent Publication No. 1995-301792 discloses a technique for controlling the adhesion of 15 adhesives to a non-uniform screen on an LC display panel, which is caused by heat and humidity resistance conditions. Caused by the stress density between the adhesive film and the glass plate. However, despite this technique, it is difficult to maintain a certain amount of modified adhesion. For example, depending on the type of adhesive used, the continuous progress of the crosslinking reaction will cause aging. In particular, when a copolymer is used to produce an adhesive layer, the copolymer is introduced by introducing a predetermined amount of reactive functional groups to a non-reactive acrylic primary monomer because a very small amount of crosslinking agent is used. It is difficult to effectively control the crosslinked structure that represents adhesion and adhesion. 5 201020303 In addition, Japanese Patent Publication No. 1996-120238 discloses adhesion-based aging and adhesion to long-lasting adhesives. A technique using an epoxy-containing leaver to reduce the influence of adhesion characteristics between the film and the glass sheet. . However, as a method for controlling the adhesion and adhesion of the adhesive, 5 the technique is not sufficiently feasible to achieve uniform adhesion and adhesion, and it is difficult to control the adhesion and adhesion through the technique. Therefore, it is considered to be insufficiently efficient. That is, since the crosslinking agent used for the adhesive mainly contains at least three reactive functional groups, accurate control of the molecular structure of the adhesive is not easily accomplished because of the complexity of the crosslinked structure of the synthesized adhesive layer. Sex. Further, a method of adding a polymerizer and a low molecular weight (co)polymer which does not contain a curing functional group to a polymeric copolymer to minimize the shrinkage stress of the adhesive has been typically used. Such a method, while reducing the shrinkage stress', results in contamination of the adhesive fluid or the cut portion 15 when the polarizing plate is cut, causing workability and serious problems of applying the plate to the related product.
【明内J 發明概要 本發明係籌畫以針對上述問題。本發明之目標係提供 20 一黏著劑組成物，其包含一反應性高分子量共聚物、一反 應性中分子量共聚物及一反應性低分子量共聚物，且特別 是提供一黏著劑組成物以減輕收縮應力而補足低玻螭轉化 溫度及低交聯效能之黏著劑的漏光性質。特別是，非反應 性寡聚體係典型地使用於該技藝中，但反應性中分子量共 201020303 聚物及反應性低分子量共聚物係使用於本發明中，以滅輕 收縮而不具黏著劑流體或切割部上之壓縮效應以補足該， 光性質，且將由黏著劑及光學薄膜之基材間的大小變化矣 異所引起的殘餘應力減至最低。 5 本發明之另一目標係提供顯示裝置之一側或兩供丨用之 光學薄膜，其係提供有用於控制漏光之黏著劑組成物所生 產之黏著劑層。 本發明之又一目標係提供包含顯示裝置之一側成兩伯】 Φ 用之光學薄膜的顯示裝置’其係提供有用於控制漏光之漆占 10 著劑組成物所生產之黏著劑層。 本發明之前述及其他目標及優點將自下述說明本發明 之較佳實施例的描述中顯的明白。 技術解決 前述目標係由用於控制漏光之黏著劑組成物所達成’ 15 其包含（A)—具2, 000, 000至2, 500, 000重量平均分子量之 _ 反應性高分子量丙烯酸共聚物，（B)—具1，500, 〇〇〇至 2, 000, 000重量平均分子量之反應性中分子量丙烯酸共聚 物’（C)一具100, 000至500, 000重量平均分子量之反應性低 分子量丙烯酸共聚物及（D)—交聯劑，且其特徵在於該高分 20子量丙烯酸共聚物、該中分子量丙稀酸共聚物及該低分子 量丙烯酸共聚物係由下列成份聚合而成之反應性共聚物 (a)90至99_ 9重量份之烧基丙稀酸酯，該烧基丙稀酸酯具有 一碳數係4至12之烷基，及（b)0_l至1〇重量份之乙烯基單 體’該乙烯基單體具有一可與交聯劑交聯之官能基。 201020303 此處’本發明之特徵在於，卩1GQ重量份之高分子量 丙稀酸共聚物為準，其係使用2G至igg重量份之中分子量 丙稀酸’、聚物’ 1至50重量份之低分子量丙稀酸共聚物及 0· 001至5重量份之交聯劑。 5 較佳&纟發明之特徵在於高分子#丙烯酸共聚物、 中刀子量丙烯酸共聚物及低分子量丙稀酸共聚物之玻璃轉 化溫度係-60至-40。 較佳地’本發明之特徵在於點著劑組成物之膠質部份 係40至60%。 1〇 争乂佳地，本發明之特徵在於乙稀基單體係一或多種選 自由具有-縣之乙烯基單體及具有_經基之乙烯基單體 所組成的群組之乙烯基單體。 較佳地，本發明之特徵在於點著劑組成物進一步包含 (E)石夕烧偶合劑，該魏偶合劑係選自由乙烯基雜、環氧 15矽烷及甲代丙烯酸矽烷所組成的群組。 較佳地，本發明之特徵在於烷基丙烯酸酯係一或多種 選自由丙烯酸正丁酯、丙烯酸甲酯、2_乙基丙烯酸己酯、 丙烯酸第三丁酯、丙烯酸正辛酯及丙烯酸異壬酯所組成的 群組之燒基丙烯酸酯。 20 較佳地，本發明之特徵在於具有一羧基之乙烯基單體 係一或多種選自由丙烯酸、甲代丙烯酸、衣康酸及順丁烯 二酸所組成的群組之乙烯基單體。 較佳地，本發明之特徵在於具有一羥基之乙烯基單體 係一或多種選自由（曱代）丙烯酸一羥基丁酯、（曱代）丙烯 201020303 丙烯：2基=丙(-甲:)丙稀酸I經基乙，及(甲代) ”減丙一醇6旨所组成的群組之乙 較佳地，本發明之 曱苯二異氱酸酯、、父聯劑係-或多種選自由 氰酸喂及三羥甲基甲烷二異氰酸酿、六亞甲基二異 組成的群組之交聯劑“成至甲苯二異氰酸酿的加成物所 成，本發明之目標係、由顯Μ置用光學薄膜所達[Ming Na J Summary of the Invention The present invention is directed to the above problems. The object of the present invention is to provide a 20-adhesive composition comprising a reactive high molecular weight copolymer, a reactive medium molecular weight copolymer and a reactive low molecular weight copolymer, and in particular to provide an adhesive composition for mitigating The shrinkage stress compensates for the light leakage properties of the adhesive with low glass transition temperature and low crosslinking efficiency. In particular, non-reactive oligomeric systems are typically used in the art, but reactive mid-molecular weights 201020303 and reactive low molecular weight copolymers are used in the present invention to eliminate light shrinkage without adhesive fluids or The compressive effect on the cut portion complements the light properties and minimizes residual stresses caused by variations in the size of the adhesive and the substrate of the optical film. Another object of the present invention is to provide an optical film on one side or two sides of a display device which is provided with an adhesive layer produced by an adhesive composition for controlling light leakage. Still another object of the present invention is to provide a display device comprising an optical film for use on one side of a display device, which is provided with an adhesive layer for controlling light leakage. The foregoing and other objects and advantages of the invention are apparent from the description of the preferred embodiments of the invention. The technical solution to the aforementioned objectives is achieved by an adhesive composition for controlling light leakage '15 which comprises (A) - a reactive high molecular weight acrylic copolymer having a weight average molecular weight of 2, 000, 000 to 2,500,000, (B) - Reactive medium molecular weight acrylic copolymer having a weight average molecular weight of 1,500, 〇〇〇 to 2,000,000, '(C) a reactive low molecular weight of 100,000 to 500,000 weight average molecular weight An acrylic copolymer and (D)-crosslinking agent, and characterized in that the high-component 20-component acrylic copolymer, the medium-molecular-weight acrylic copolymer, and the low molecular weight acrylic copolymer are polymerized by the following components Copolymer (a) 90 to 99 to 9 parts by weight of a mercapto acrylate having a carbon number of 4 to 12 alkyl groups, and (b) 0-1 to 1 part by weight Vinyl monomer 'The vinyl monomer has a functional group crosslinkable with a crosslinking agent. 201020303 Here, the present invention is characterized in that 卩1GQ parts by weight of the high molecular weight acrylic acid copolymer is used, and 2 to igg parts by weight of the molecular weight acrylic acid ', polymer' is used in an amount of from 1 to 50 parts by weight. a low molecular weight acrylic acid copolymer and from 0.0001 to 5 parts by weight of a crosslinking agent. 5 Preferred & Invention The invention is characterized in that the glass transition temperature of the polymer #acrylic copolymer, the medium knife acrylic copolymer and the low molecular weight acrylic copolymer is -60 to -40. Preferably, the invention is characterized in that the gel fraction of the dot composition is 40 to 60%. 1. The present invention is characterized in that the present invention is characterized in that one or more vinyl substrates are selected from the group consisting of vinyl monomers having -counts and vinyl monomers having a methine group. body. Preferably, the present invention is characterized in that the dot composition further comprises (E) a sulphur coupling agent selected from the group consisting of vinyl, epoxy 15 decane and decyl methacrylate. . Preferably, the invention is characterized in that the alkyl acrylate is one or more selected from the group consisting of n-butyl acrylate, methyl acrylate, 2-hexyl hexyl acrylate, tert-butyl acrylate, n-octyl acrylate and isophthalic acid acrylate. A burnt acrylate of the group consisting of esters. Preferably, the present invention is characterized in that the vinyl monomer having a carboxyl group is one or more vinyl monomers selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid and maleic acid. Preferably, the present invention is characterized in that the vinyl single system having one hydroxyl group is one or more selected from the group consisting of (deuterated) monohydroxybutyl acrylate, (deuterated) propylene 201020303 propylene: 2 base = C (-A:) Preferably, the acrylic acid I is subjected to a group consisting of a group B and a (meth) propylene propylene-deficient group, preferably, the phthalic acid diesteride of the present invention, the parent-linked agent system or a plurality of The crosslinking agent of the group consisting of cyanic acid feeding and trimethylol methane diisocyanate and hexamethylene diisomer is formed into a toluene diisocyanate-added product, and the invention is The target system is made up of optical film by the display
特徵在於由用於㈣漏光之料敝成物所製得 黏者劑層係提供於顯示裝置用光學薄膜之基材的一側或兩 10 侧0 此處’本發明之特徵在於當黏著劑層乾燥時其厚度 係 5 至 l〇〇#m。 較佳地，本發明之特徵在於顯示裝置用光學薄膜係偏 光膜、.反射偏光膜或相位差膜。 15 較佳地，本發明之特徵在於光學薄臈係橢圓偏光膜， 其中一偏光膜及一相位差膜係藉由丙烯酸黏著劑組成物予 以堆疊。 另外，本發明之目標係由顯示裝置所達成，該顯示裝 置的特徵在於其包含顯示裝置之一侧或兩側用之光學薄 20膜’其係提供有用於控制漏光之黏著劑組成物所製得之黏 著劑層。 本發明之優良破灵 本發明之優點在於黏著劑之收縮應力係減輕以補足該^ 201020303 篇光丨質且將由基材及光學薄膜之黏著顧的大小變化 差異所引起的殘餘應力減至最低。 圖式簡單說明 本發明之特徵及優點將自下述藉參照隨附圖式而說明 5本發明之較佳實施例的詳細描述中顯的明白其中： 第1圖係圖7F地表示—典型的液晶顯示裝置。 第2圖顯不-經延展之橫戴面圖，其中幻圖中的區域a 係經延展。 I：實施方式】 ❹ 10 較佳實施例之詳細說明 在下文中’本發明將參照本發明之實施例及圖式而被 詳細描述。該等實施例係被意圖用於更明確地說明本發明 但本發明之範圍不被該等實施例所限制係對熟習此藝者顯 - 而易見的。 15 根據本發明’用於控制漏光之黏著劑組成物包含（八）一 具2, 000, 000至2, 500, 000重量平均分子量之反應性高分子 量丙烯酸共聚物，（B)—具1，500, 000至2, 000, 〇〇〇重量平均 ® 分子量之反應性中分子量丙烯酸共聚物，（C)一具100,〇〇〇 至500, 000重量平均分子量之反應性低分子量丙烯酸共聚 2〇 物及（D) —交聯劑，且其特徵在於該高分子量丙烯酸共聚 物、該中分子量丙烯酸共聚物及該低分子量丙烯酸共聚物 係由下列成份聚合而成之反應性共聚物（a)9〇至卯.9重量 份之烷基丙烯酸酯，該烷基丙烯酸醋具有一碳數係4至丨2之 烷基，及（b)0.1至10重量份之乙烯基單體，該乙烯基單體 10 201020303 具有一可與交聯劑交聯之官能基。 5 10 15 較佳地，本發明之特徵在於，以100重量份之高分子量 丙烯酸共聚物為準，其係使用20至100重量份之中分子量丙 烯酸共聚物及1至50重量份之低分子量丙烯酸共聚物及 0.001至5重量份之交聯劑。 根據本發明，利用前述構形中用於控制漏光之 黏著劑組成物，將基材及黏著劑間的大小變化差異所產生 的殘餘應力減至最低係可能的。在本發明中，係使用有藉 由引入特定量之具有一反應性官能基的單體至一非反應性 丙烯酸主單體，且藉由控制該共聚物中所含有的具有一反 應性官能基的單體之含量所產生之高分子量共聚物、中分 子量共聚物及低分子量共聚物，藉以有效地控制具有附著 及黏著之交聯結構係可能的。 因此，根據本發明，用於控制漏光之黏著劑組成物可 降低因裝備於顯示裝置中之偏光板上的收縮應力而發生在 各構形層中之複合雙折射，以改良顯示裝置中之漏光性 質，該組成之特徵在於具有各種物理性質，如初黏著性、 永久黏著性、效能維持及切割中之特徵等等。 同時，寡聚體已典型地被添加至高分子量共聚物以將 黏著劑之收縮應力減至最低。然而，如此之方法係一降低 收縮應力的好方式，但黏著劑會在切割偏光板時在該切割 部上流動。 因此，在本發明中，分子量之廣泛分佈係藉由混合高 分子量、中分子量及低分子量（共）聚合物而實行。為針對 20 201020303 上述習知技藝中之問題，中分子量共聚物係被使用而不使 用作為塑化劑功能之寡聚體。最小量之硬化劑係被使用以 達成南分子鏈之平穩流體，從而減輕收縮應力且因此將漏 光減至最低。 5 另外，根據本發明’丙烯酸共聚物之玻璃轉化溫度Tg 係藉用於丙烯酸共聚物之最佳固化系統而被保持等於或低 於-40 C以控制收縮應力。高分子量、中分子量及低分子量 丙烯酸共聚物之玻璃轉化溫度Tg係不高於-4(TC，且較佳 地包含地介於-60至-4(rc。若其之玻璃轉化溫度係高於 參 10 _40°c ’長期減輕偏光膜之收縮應力係不可能的。 根據本發明，用於控制漏光之黏著劑組成物係較優良 在於減輕因由組成偏光膜的基材與黏著劑間的大小變化差 - 異所產生的内部應力’且為因此將漏光減至最低，根據本 發明用於控制漏光之黏著劑組成物的膠質部分係較佳地介 15 於 40 至 60%。 根據本發明’組成用於控制漏光之黏著劑組成物的高 分子量丙烯酸共聚物之重量平均分子量係介於2, 〇〇〇, 〇〇〇 ® 至2, 500, 000，且較佳地包含地介於2, 200, 〇〇〇至 2, 500, 000。藉由使用高分子量丙烯酸共聚物，良好的黏著 20係達成於基材及偏光板或相位差板及偏光板之間，且起泡 或離型係被避免的。中分子量丙烯酸共聚物之重量平均分 子量係包含地介於1，500, 000至2, 000, 000，且較佳地包含 地介於1，500, 000至1，800, 000。低分子量丙烯酸共聚物之 重量平均分子量係介於100, 〇〇〇至500, 000，且較佳地包含 12 201020303 地介於200, 000至350, 000。丙稀酸共聚物分子量之適當量 可藉由適當地調整條件而決定，如聚合作用時間、聚合作 用起使劑、聚合作用溫度及聚合作用溶劑等等。做為對於 該條件本發明之一實施例，高分子量丙烯酸共聚物可在60 5至63°C的溫度下以0. 1至0. 18重量份之偶氮雙異丁腈（AIBN) 聚合作用起始劑生產，且中分子量丙烯酸共聚物可在64至 68°C的温度下以0. 19至0. 25重量份之偶氮雙異丁腈（AIBN) 聚合作用起始劑生產。 φ 另外，高分子量、中分子量及低分子量丙烯酸共聚物 1〇 係以烷基丙烯酸酯為準且係具有一單體的共聚物’該單體 含有一可與丙烯酸酯及多官能化合物反應之官能基。 具有碳原子數4至12的烷基且組成高分子量、中分子 " 量及低分子量丙稀酸共聚物的烧基丙稀酸醋的例子包括， 但不侷限於，丙烯酸甲酯、丙烯酸乙酯、丙烯酸丙酯、丙 15 烯酸正丁酯、丙烯酸異丁酯、2-乙基丙烯酸己酯、丙烯酸 正辛酯、丙烯酸異辛酯、丙烯酸月桂酯、丙烯酸十八酯、 ^ 丙稀酸環己醋、丙稀酸节S旨、丙稀酸第三丁 S旨、丙稀酸異 壬酯等等。 烷基丙烯酸酯可被單獨地或以其之二或多種之組合使 20 用。 另外’具有一對交聯劑有反應性之官能基的單體的例 子包括具有一羧基之乙烯基單體、具有一羥基之乙烯基單 體、具有一胺基之乙烯基單體、具有一環氧基之乙烯基單 13 201020303 體及具有一乙醯乙醢基之乙烯基單體等等。本發明中，具 有一羧基之單體及具有一羥基之單體系較佳地被使用。 具有一羧基之例示性乙烯基單體包括丙烯酸、甲代丙 烯酸、貝他-丙烯酸羧乙酯、衣康酸、巴豆酸、順丁烯二酸、 5 順丁烯二酐、順丁烯二酸丁酯等等，但不偈限於其等。另 外，具有一羥基之例示性乙烯基單體包括（曱代）丙烯酸-4-羥基丁酯、乙基（曱代）丙烯酸-2-羥基乙酯、（曱 代）丙烯酸-2-羥基乙二醇酯、（甲代）丙烯酸-2-羥基丙二醇 酯等等。 10 具有一胺基之例示性乙烯基單體包括（甲代）丙烯酸胺 基曱酯、（甲代）丙烯酸二曱基胺基曱酯、（曱代）丙烯酸二 曱基胺基乙酯、（曱代）丙烯酸二甲基胺基丙酯及乙烯基 吡啶等等。單體之另一例子係具有一環氧基之單體，如（甲 代）丙烯酸縮水甘油酯，具有一乙醯乙醯基之單體，如（甲 15 代）丙烯酸乙醯醋酸基乙酯等等。前述單體可被單獨地或以 其之二或多種之組合使用。 多官能化合物中的官能基可與丙烯酸共聚物反應，且 一分子中的官能基數可為至少2，且較佳地2至4。這類多 官能化合物的例子包括異氰酸酯化合物、環氧化合物、胺 20 基化合物、金屬螯合化合物及氮丙啶化合物等等。 例示性異氰酸酯化合物包括曱苯二異氰酸酯、六亞甲 基二異氰酸酯、異佛爾酮二異氰酸酯、二甲苯二異氰酸酯、 加水二甲苯二異氰酸酯、二苯基曱烷二異氰酸酯、加水二 苯基甲烷二異氰酸酯、四甲基二甲苯二異氰酸酯、萘二 201020303 異氰酸酯、三苯基曱烷三異氰酸酯、聚亞曱基聚苯基 異氰酸酯及多元醇受體，如三羥曱基丙烷等等。 例示性環氧化合物包括雙酚A、環氧氣丙烷環氧樹脂、 乙二醇縮水甘油謎、聚乙二醇二縮水甘油謎、甘油二縮水 5 甘油醚、甘油三縮水甘油醚、1，6-己二醇二縮水甘油醚、 三羥基曱烷丙烷三縮水甘油醚、二縮水甘油苯胺、二縮水 甘油胺、Ν，Ν，Ν’，Ν’-四縮水甘油-m-二甲苯二胺、1,3-二 (N，Ν’-二縮水甘油胺甲基）環己烷等等。 例示性胺基化合物包括六亞曱基二胺、三乙基二胺、 10 聚乙烯亞胺、六亞曱基四胺、二亞乙基三胺、三乙基四胺、 異佛爾酮二胺、胺基樹脂及聚胺亞甲基樹脂等等。 例示性金屬獒合化合物包括其中多價金屬，如鋁、鐵、 銅、辞、錫、鈦、鎳、銻、鎂、釩、鉻及鍅等等，係與乙醯 丙酮或乙醯乙酸乙酯配位之化合物。 15 例示性氮丙啶化合物包括Ν，Ν，-二苯基甲烷_4, 4，-二 (卜羰化氮丙啶）、Ν，Ν’-曱苯-2,4-二（1-羰化氮丙啶）、三 亞乙基二I氰胺、二間苯二醯甲基氮丙0定）、三一ι_ 氮丙啶基膦氧化物、Ν，Ν，-六亞甲基〜1，6-二（1-羰化 氮丙啶）、二羥甲基丙烧-三—貝他-丙酸氮丙啶及四羥甲基 2〇甲烷-三·•貝他-丙酸氮丙啶等等。 以100重量份之高分子量丙烯酸共聚物為準多官能 化合物（交聯劑）之量係典型地介於0 〇〇1至5重量份，且 較佳地係0.01至3重量份。藉由使用特定量之多官能化合 物，-較佳3維交聯結構係與高分子量（甲代）丙稀酸共^ 15 201020303 物形成。另外，多官能化合物可被單獨地或以其等之組合 使用。 高分子量丙烯酸共聚物、中分子量丙烯酸共聚物及低 分子量丙烯酸共聚物可以該技藝中任何習知方法被生產。 5 例如，高分子量丙豨酸共聚物係由0.01至0.5重量份 之聚合作用起始劑（偶氮-聚合作用起始劑，如 偶氮雙異丁腈、偶氮二環己烷腈等等；過氧化物，如 過氧化苯曱醯、過氧化乙醯等等；光聚合作用起始劑，如 二苯基嗣、2_經基_2_甲基_1_苯基-丙烧_1_嗣等等）’以100 ίο 重量份之原料單體為準，以本體聚合作用、液相聚合作用、 乳化聚合作用、懸浮聚合作用等等之方式所合成，且較佳 地係以液相聚合作用之方式。對於液相聚合作用，例示性 聚合作用液體包括乙酸乙酯、甲苯、己烷及丙酮等等。用 於反應之溫度係設於50至150°C，且較佳地係於50至 15 110°c。用於反應之時間係設於2至15小時，且較佳地係7 至10小時。 另外，中分子量及低分子量丙烯酸共聚物係與用於高 分子量丙烯酸共聚物相同之方式所合成，如以本體聚合作 用、液相聚合作用、乳化聚合作用、懸浮聚合作用等等之 20 方式，且較佳地係以液相聚合作用之方式。其係以0. 01至 0.1重量份之聚合作用起始劑（偶氮-聚合作用起始劑，如 偶氮雙異丁腈、偶氮二環己烷腈等等；過氧化物，如 過氧化苯甲醯、過氧化乙醯等等；光聚合作用起始劑，如 二苯基酮、2-羥基-2-甲基-1-苯基-丙烷-1-酮等等），以100 201020303 重量份之原料單體為準，以本體聚合作用、液相聚合作用、 乳化聚合作用、懸浮聚合作用等等之方式所合成，且較佳 地係以液相聚合作用之方式。 對於液相聚合作用，例示性聚合作用液體包括乙酸乙 5 酯、甲苯、己烧及丙酮等等。用於反應之溫度係設於至 150°C，且較佳地係於50至110eC。用於反應之時間係設於2 至15小時，且較佳地係5至10小時。 根據本發明，用於控制漏光之黏著劑組成物包含高分 ^ 子量丙烯酸共聚物、中分子量丙烯酸共聚物及交聯劑，且 10 可與使用於典型的黏著劑之耐候性安定劑、增黏劑、 . 塑化劑、軟化劑、染料、色素、矽烷偶合劑、無機填充物 等等進一步混合。 根據本發明，使用於用於控制漏光之黏著劑組成物中 的（E)矽烷偶合劑可有效地促進玻璃基材及黏著劑間的黏 15著’且特別地當留在高溫及高溼度的條件下時，幫助改善 # 黏著可靠性。考慮如此之效能，以100重量份之丙烯酸共 聚物為準，矽烷偶合劑之量較佳地係〇. 〇丨至〇. 1重量份。 例示性石夕烧偶合劑包括乙烯基矽烷、環氧矽烷及甲代丙烯 酸矽烷等等，但不侷限於其等。 20 树明亦關於顯示裝置之-側或兩側用之光學薄膜， 其係提供有如上所描述的用於光學薄膜之丙稀酸黏著劑組 成物所製得之黏著劑層，且關於提供有該光學薄膜之顯示 17 201020303 裝置。例示性顯示裝置包括陰極射線管（CRTs)、液晶顯示 器（LCDs)及電漿顯示面板（PDPS)等等。 第1圖係圖表式地說明一般的LCD。 參照第1圖，LCD包含一 LCD面板500、一第一及—第 5 一光學薄膜640, 620，其用於極化入射光且將之導出及— 背光總成700，其用於產生及提供入射光至LCD面板5〇〇， 該LCD面板包含液晶胞56〇，其係置於一對透明 面板520, 540之間。第一光學薄膜64〇係設置於LCD面板 500之上側上。第二光學薄膜62〇係置於LCD面板5〇〇及背 魯 10 光總成700之間。 第一及第二光學薄膜640, 620之功能在於將入射光分 — 離成彼此垂直之兩分量且傳送該兩光分量之一以將其一致 地導向其傳送方向。此即，對於入射光，第一及第二光學 薄骐640,620吸收以如第一及第二光學薄膜64〇 62〇之偏 15光軸相同方向振盪之光，且傳送以其他方向振盪之光。於 本案中，第一光學薄膜640之偏光軸係與第二光學薄膜62〇 _ 之偏光軸垂直。 第2圖係一經延展之橫截面圖，於其中第丨圖中的區 域A係經延展’且說明使用於典型STN或CSTN LCd中之光 °學薄膜。第2圖中，離型膜12及保護膜28之間，堆疊有 偏光膜26及於偏光膜下侧之相位差膜16,該偏光膜包含第 —逯明保護膜20、偏光板22及第二透明保護膜24。於本 18 201020303 案中’相位差膜16係藉由偏光膜26、離型膜12及第一與 苐一黏著劑層14, 18而黏合。 如此形成之黏著劑層的厚度當乾燥後係典型地5至 100 /a，且較佳地2〇至50娜。 5 另外，顯示裝置用光學薄膜可為偏光膜、反射偏光膜 或相位差膜等等，較佳地’顯示裝置用光學薄膜係藉由以 丙烯酸黏著劑組成物之方法堆疊偏光膜及相位差膜所產生 # 的橢圓偏光膜。 使用於本發明之偏光膜可為該技藝令傳統知悉的偏光 10膜。例如’多層薄膜可被使用，其係藉由堆疊透明保護膜， 如纖維素薄膜，如3-纖維素乙酸酯薄臈等等、聚碳酸膜及 聚酯砜(p〇lyestersul f one)薄膜等等於偏光板上所產生， 該偏光板藉由包括極化組份，如碘染料或雙色染料等等， 15於聚乙烯醇樹脂之薄膜中，如聚乙烯醇、聚乙稀醇縮甲越、 ❹15 f乙稀㈣及乙稀醋酸乙_旨共聚物等等，而後延伸該薄 斤獲知。形成黏著劑層於偏光膜中不限於特定方法。一 吏用之勤性方法係用塗佈棒及相似物直接施加黏著劑 法偏光膜之表面上’而後乾燥該合成的薄膜。然而，—方 加乾其由施加黏著劑於基材之可離型的表面上、 面知及轉移形成於基材上之合成的黏著劑層至偏光膜的表 而後老化薄膜與黏著劑層之步驟所組成。 以根據本發明’光學薄膜除偏光膜之外，還進一步包含 目仅差層，其用於引起環形極化以改良對比。1/4相位 19 201020303 差層可為聚合物薄膜或塗覆有LC且配置於-方向之層，且 可0含聚°物薄膜及塗覆有LC之層的兩者。1/4相位差層 、弓丨起可見區中各波長約1/4波長之相位差且較佳 位差層係於雙折射、穿透性及熱抗性之控制性中 5較優良之層。用於生產1/4相位差層之材料不限於特定材 料…:而，右1/4相位差層係雙折射之聚合物薄膜，該薄 膜包含選自由聚碳酸、聚碳酸共聚物、聚乙稀、聚丙稀、 聚降冰片婦、聚氣乙稀、聚苯乙稀、聚丙婦腈、聚醋、聚石風、 聚芳酯、聚乙烯醇、聚甲代丙烯酸酯、聚丙烯酸酯及纖維 10 素酯所組成的群組之至少一者係較佳。 由1/4相位差層所組成的聚合物薄膜係以h丨至3的 比率疋位且可能地係單軸或雙軸定位之透明薄膜係較佳。 根據本發明，提供有偏光膜或相位差膜之薄膜可與其 他功能層，如保護層、反射層或抗眩層等等堆疊。 15 在下文中，本發明將參照實施例及比較例更詳細地被 描述，但應注意的是下列實施例說明本發明且本發明之範 圍不限於該等實施例。 丙烯酸共聚物 對於實施例1至6’一反應室首先提供有如下列表以 20 「重量份」之單位）所示之内容，其中丙烯酸正丁酯、丙烯 酸甲S曰丙烯酸及（曱代）丙稀酸_4 一經基丁g旨為聚合作用單 體，l〇〇g之乙酸乙酯為溶劑及偶氮雙異丁腈（人化…為 聚合作用起始劑。 201020303 在反應室中以氮氣取代空氣後’該混合物係被授拌同 時升高該混合物之溫度至63。(：，而後以如下列表1所示之 反應時間聚合。於聚合反應後，該結果的混合物係以10〇g 之乙酸乙酯稀釋以獲得固體丙烯酸共聚物液相。於聚合物 5 液相中，固體之重量係以固體測量機之方法於測量黏著劑 之起始重量而後於l〇〇°C蒸發該溶劑30分鐘後測得。聚合 物之分子量係以膠體滲透層析儀（GPC)之方法測得。玻璃轉 化溫度係於-70°C至2(TC在氮氣流體下熱上升速度 l〇°C/min以示差掃插熱分析儀（DSC)之方法測得。對於物理 10 性質之數值係顯示於下列表2中。 生產丙烯醴共聚物 對於比較例1至6’如上述實施例之相同聚合方法係被 實行，除了作為聚合單體之丙烯酸正丁酯、丙烯酸甲酯、 丙稀酸及（甲代）丙缔酸-4-經基丁醋之混合比率係被依如 15下列表1(以「重量份」之單位）所示實施之外，以及除了依 據如表1所π對於聚合作用起始劑及反應時間的條件之聚 合作用之外。 表1 η~ΒΑ ΜΑ ΑΑ 4-ΗΒΑ AIBN 反應時間 (hr) 實施例1 98 —— 0 —-—— 1 1 0. 015 15 實施例2 98 0 1 1 0. 017 13 實施例3 99 0 1 0 0. 020 8 21 201020303 實施例4 99 0 1 0 0. 022 7 實施例5 93 5 1 1 0. 025 2. 5 實施例6 93 5 1 1 0.27 1.3 比較例1 84 10 5 1 0. 015 15 比較例2 74 20 5 1 0. 017 13 比較例3 54 40 5 0 0. 022 7 比較例4 44 50 5 0 0. 023 5 比較例5 54 40 5 0 0.022 2. 3 比較例6 44 50 5 0 0. 025 1.5 分別地，其中「n-BA」代表「丙烯酸正丁酯」、「ΜΑ」 代表「丙烯酸甲酯」、「ΑΑ」代表「丙烯酸」、「4-ΗΒΑ」 代表「（甲代）丙烯酸-4-羥基丁酯」及「ΑΙΒΝ」代表 「偶氮雙異丁腈」。 5 表2 固艘（wt%) 分子量（Mw)以 百萬計 Tg(°C ) 實施例1 20.2 2. 50 -53 實施例2 19. 5 2. 23 -52. 5 實施例3 16. 5 1.70 -49. 5 實施例4 15.5 1.50 -48 實施例5 16.3 0.42 -45 實施例6 15.8 0. 33 -46. 2 比較例1 20.4 2. 39 -42 比較例2 18. 5 2. 15 -38 22 201020303 比較例3 14 1. 80 -32 比較例4 13.5 1.50 -28 比較例5 13.2 0.39 -33 比較例6 15. 9 0.31 -25 豐施例7至14 :生產施加該黏著劊组成物之偏先板 5 10 ❿ 15 實施例1至6中所獲得之聚合物係以如下列表3(以「g」 之單位）中所示之混合比率混合，且〇.2g之三甲基六亞甲 基二胺固體係作為交聯劑而被添加至該混合物以及攪拌以 獲得用於生產偏光板之黏著劑組成物。用於生產如此所獲 得之偏光板的黏著劑組成物係施加至聚酯離型膜且該合成 的經塗覆薄膜係被乾燥。於此案中，該塗覆係控制為於乾 燥後25 w之厚度。隨後，在溫度23。(：及溼度45 %下老化7 天之後，施加於離型膜上之黏著劑組成物係轉移至2〇〇泖 之偏光膜以獲得本發明之偏光板。 提供有該黏著劑層之偏光板係切割為21〇咖χ 297丽 之尺寸致使該吸收轴相對於該偏光板之長邊保持45。。該 偏光板係在30C之溫度及5 kg/cm2之壓力下6〇分鐘而保 留於玻璃板之一側。 如此所獲得之樣本係保持在7(rc之溫度及97%之溼度 下500小時以視覺上觀察及評估起泡及脫落，及以視覺上 觀察及評估色斑。用-游標卡尺，自偏光板長邊上的黏著 位置偏離之距離係被測得。 23 201020303 爲找出該黏著劑組成物之膝質部分，〇. lg之在23°C之 溫度及65%RH下老化之樣本組成物係置於該黏著劑組成物 之樣本瓶中。對該組成物，50g之乙酸乙酯係被添加且該混 合物被攪拌24小時。樣本瓶中之内容物係以2〇〇網眼之不 鏽網過濾以分離。網上之殘餘物係在l〇(TC下乾燥2小時且 乾燥後其之重量係被測得。膠質部分而後係根據下列方程 式1而獲得。 方程式1 膠質部分（％)=(乾燥後重量/樣本黏著劑組成物之重量）χ 10 100 測量獲得的物理性質之結果而後係顯示於下列表4中。 ^feLUJ4:提供有該黏著劑组成輛夕德氺γ 除了比較例1至6中所獲得的聚合物係以下列表3(以 g」之單位）所示之混合比率混合之外，偏光板係實質上 15依實施例7至14之相同方法生產以測量偏光板之物理性 參 質。所獲得的物理性質之數值係顯示於下列表4中。The adhesive layer provided by the material for (4) light leakage is provided on one side or both sides of the substrate of the optical film for display device. Here, the present invention is characterized by an adhesive layer. The thickness is 5 to l〇〇#m when dry. Preferably, the present invention is characterized by an optical film-based polarizing film, a reflective polarizing film or a retardation film for a display device. Preferably, the present invention features an optically thin iridium-based elliptically polarizing film in which a polarizing film and a retardation film are stacked by an acrylic adhesive composition. Further, the object of the present invention is achieved by a display device characterized in that it comprises an optical thin film 20 on one side or both sides of a display device, which is provided with an adhesive composition for controlling light leakage. Get the adhesive layer. The present invention has the advantage that the shrinkage stress of the adhesive is reduced to complement the photocatalyst of 201020303 and to minimize the residual stress caused by the difference in the size of the adhesive between the substrate and the optical film. BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the present invention will be apparent from the following description of the preferred embodiments of the invention. Liquid crystal display device. Figure 2 shows an extended cross-sectional view in which the area a in the phantom is extended. I: Embodiments ❹ 10 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments and drawings of the present invention. The examples are intended to be more illustrative of the invention, but the scope of the invention is not limited by the embodiments and is readily apparent to those skilled in the art. The adhesive composition for controlling light leakage according to the present invention comprises (VIII) a reactive high molecular weight acrylic copolymer having a weight average molecular weight of 2, 000, 000 to 2,500,000, (B)- 500,000 to 2,000, 〇〇〇weight average® molecular weight reactive medium molecular weight acrylic copolymer, (C) a reactive low molecular weight acrylic copolymer of 100, 〇〇〇 to 500,000 weight average molecular weight And (D) - a crosslinking agent, characterized in that the high molecular weight acrylic copolymer, the medium molecular weight acrylic copolymer and the low molecular weight acrylic copolymer are reactive copolymers obtained by polymerizing the following components (a) 9 9 to 9 parts by weight of an alkyl acrylate having a carbon number of 4 to 2 alkyl groups, and (b) 0.1 to 10 parts by weight of a vinyl monomer, the vinyl monomer Body 10 201020303 has a functional group that can be crosslinked with a crosslinking agent. 5 10 15 Preferably, the present invention is characterized in that 100 parts by weight of the high molecular weight acrylic copolymer is used, and 20 to 100 parts by weight of the intermediate molecular weight acrylic copolymer and 1 to 50 parts by weight of the low molecular weight acrylic acid are used. The copolymer and 0.001 to 5 parts by weight of a crosslinking agent. According to the present invention, it is possible to minimize the residual stress caused by the difference in size between the substrate and the adhesive by using the adhesive composition for controlling light leakage in the above configuration. In the present invention, a monomer having a reactive functional group to a non-reactive acrylic main monomer is introduced by introducing a specific amount, and by controlling a reactive functional group contained in the copolymer The high molecular weight copolymer, medium molecular weight copolymer and low molecular weight copolymer produced by the monomer content are used to effectively control the crosslinked structure with adhesion and adhesion. Therefore, according to the present invention, the adhesive composition for controlling light leakage can reduce the composite birefringence occurring in each constituent layer due to the contraction stress of the polarizing plate provided in the display device, thereby improving light leakage in the display device. Nature, the composition is characterized by various physical properties such as initial adhesion, permanent adhesion, performance maintenance, and characteristics in cutting. At the same time, oligomers have typically been added to high molecular weight copolymers to minimize shrinkage stress of the adhesive. However, such a method is a good way to reduce the contraction stress, but the adhesive flows on the cutting portion when the polarizing plate is cut. Therefore, in the present invention, the broad distribution of molecular weight is carried out by mixing high molecular weight, medium molecular weight and low molecular weight (co)polymers. For the problems in the above-mentioned prior art of 20 201020303, a medium molecular weight copolymer is used without using an oligomer which functions as a plasticizer. A minimum amount of hardener is used to achieve a smooth fluid in the southern molecular chain, thereby reducing shrinkage stress and thus minimizing light leakage. Further, the glass transition temperature Tg of the 'acrylic acid copolymer according to the present invention is maintained equal to or lower than -40 C by the optimum curing system for the acrylic copolymer to control the shrinkage stress. The glass transition temperature Tg of the high molecular weight, medium molecular weight and low molecular weight acrylic copolymers is not higher than -4 (TC, and preferably comprises from -60 to -4 (rc. if its glass transition temperature is higher than It is impossible to reduce the shrinkage stress of the polarizing film for a long time by referring to 10 _40 °c. According to the present invention, the adhesive composition for controlling light leakage is superior in reducing the size change between the substrate and the adhesive constituting the polarizing film. The difference between the internal stress generated by the difference and the light leakage of the adhesive composition for controlling light leakage according to the present invention is preferably 15 to 60%. The high molecular weight acrylic copolymer used to control the light leakage adhesive composition has a weight average molecular weight of from 2, 〇〇〇, 〇〇〇® to 2,500,000, and preferably comprises 2,200 , to 2,500, 000. By using a high molecular weight acrylic copolymer, a good adhesion 20 is achieved between the substrate and the polarizing plate or the phase difference plate and the polarizing plate, and the foaming or release system is Avoided. Medium molecular weight acrylic acid The weight average molecular weight of the polymer is comprised between 1,500 and 2,000,000, and preferably comprises from 1,500,000 to 1,800,000. The weight of the low molecular weight acrylic copolymer The average molecular weight is from 100, 〇〇〇 to 500,000, and preferably comprises 12 201020303 in the range of 200,000 to 350,000. The appropriate amount of molecular weight of the acrylic copolymer can be adjusted by appropriately adjusting the conditions. It is determined, for example, the polymerization time, the polymerization initiator, the polymerization temperature, the polymerization solvent, etc. As an example of the present invention, the high molecular weight acrylic copolymer can be at a temperature of 60 5 to 63 ° C.至至0. 19至0。 The temperature is from 0. 1 to 0. 18 to 0 parts by weight of azobisisobutyronitrile (AIBN) polymerization initiator, and the medium molecular weight acrylic copolymer can be at a temperature of 64 to 68 ° C with 0. 19 to 0 25 parts by weight of azobisisobutyronitrile (AIBN) polymerization initiator. φ In addition, high molecular weight, medium molecular weight and low molecular weight acrylic copolymers are based on alkyl acrylate and have a single Bulk copolymer's monomer contains one with acrylate and more Functional group for functional group reaction. Examples of alkyl acrylate having a carbon number of 4 to 12 and constituting a high molecular weight, medium molecular " and low molecular weight acrylic acid copolymer include, but are not limited to , methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl propionate, isobutyl acrylate, 2-ethyl hexyl acrylate, n-octyl acrylate, isooctyl acrylate, lauryl acrylate, acrylic acid Octaester, ^ propylene hexanoic acid acrylate, acrylic acid s, succinic acid, succinic acid, isodecyl acrylate, and the like. The alkyl acrylate may be used alone or in combination of two or more thereof. Further, examples of the monomer having a functional group reactive with a crosslinking agent include a vinyl monomer having a carboxyl group, a vinyl monomer having a hydroxyl group, a vinyl monomer having an amine group, and having one Epoxy group vinyl single 13 201020303 body and vinyl monomer having an ethyl oxime group and the like. In the present invention, a monomer having a carboxyl group and a single system having a hydroxyl group are preferably used. Exemplary vinyl monomers having a carboxyl group include acrylic acid, methacrylic acid, beta-acrylic acid carboxyethyl ester, itaconic acid, crotonic acid, maleic acid, 5 maleic anhydride, maleic acid Butyl ester and so on, but not limited to it. In addition, exemplary vinyl monomers having a monohydroxy group include (deuterated) 4-hydroxybutyl acrylate, ethyl (hydroxy) 2-hydroxyethyl acrylate, (deuterated) acrylic acid 2-hydroxy ethane Alcohol ester, (meth)acrylic acid 2-hydroxypropanediol ester, and the like. 10 Exemplary vinyl monomers having an amine group include (meth) methacrylate, (meth) decyl decyl acrylate, (deuterated) decylaminoethyl acrylate, ( Deuterated) dimethylaminopropyl acrylate and vinyl pyridine, and the like. Another example of a monomer is a monomer having an epoxy group, such as glycidyl (meth) acrylate, a monomer having an acetamethylene group, such as (methyl 15) acetonitrile acetate. and many more. The foregoing monomers may be used singly or in combination of two or more thereof. The functional group in the polyfunctional compound may be reacted with the acrylic copolymer, and the number of functional groups in one molecule may be at least 2, and preferably 2 to 4. Examples of such polyfunctional compounds include isocyanate compounds, epoxy compounds, amine 20-based compounds, metal chelate compounds, aziridine compounds, and the like. Exemplary isocyanate compounds include terpene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylene diisocyanate, water xylene diisocyanate, diphenyldecane diisocyanate, diphenylmethane diisocyanate added , tetramethyl xylene diisocyanate, naphthalene II 201020303 isocyanate, triphenyl decane triisocyanate, polydecylene polyphenyl isocyanate and polyol acceptor, such as trihydroxy decyl propane and the like. Exemplary epoxy compounds include bisphenol A, epoxy propylene oxide, glycol glycidol, polyethylene glycol diglycidime, glycerol dihydrate 5 glyceryl ether, glycerol triglycidyl ether, 1,6- Hexanediol diglycidyl ether, trihydroxydecane propane triglycidyl ether, diglycidyl aniline, diglycidylamine, hydrazine, hydrazine, hydrazine, Ν'-tetraglycidyl-m-xylenediamine, 1 , 3-di(N, Ν'-diglycidylamine methyl)cyclohexane and the like. Exemplary amine based compounds include hexamethylenediamine, triethyldiamine, 10 polyethyleneimine, hexamethylenetetramine, diethylenetriamine, triethyltetramine, isophorone II Amines, amine based resins and polyamine methylene resins and the like. Exemplary metal chelate compounds include polyvalent metals such as aluminum, iron, copper, rhodium, tin, titanium, nickel, ruthenium, magnesium, vanadium, chromium and ruthenium, etc., with ethyl acetonide or ethyl acetate. Coordinating compound. 15 Exemplary aziridine compounds include ruthenium, osmium, -diphenylmethane _4, 4,-di(buxocarbazide), hydrazine, Ν'-nonylbenzene-2,4-di(1-carbonyl Aziridine), triethylidene di-cyanoamine, di-m-phenylene methylazopropionate, triammine ι_ aziridine phosphine oxide, hydrazine, hydrazine, hexamethylene 〜1, 6-bis(1-oxo-aziridine), dimethylolpropan-tri-beta-propionic acid aziridine and tetramethylol-2-indole methane-tri-beta beta-propionate aziridine and many more. The amount of the polyfunctional compound (crosslinking agent) based on 100 parts by weight of the high molecular weight acrylic copolymer is typically from 0 〇〇 1 to 5 parts by weight, and preferably from 0.01 to 3 parts by weight. By using a specific amount of the polyfunctional compound, a preferred 3-dimensional crosslinked structure is formed with a high molecular weight (meth)acrylic acid. Further, the polyfunctional compound may be used singly or in combination of them or the like. High molecular weight acrylic copolymers, medium molecular weight acrylic copolymers, and low molecular weight acrylic copolymers can be produced by any of the methods known in the art. 5 For example, the high molecular weight propionate copolymer is from 0.01 to 0.5 parts by weight of a polymerization initiator (azo-polymerization initiator such as azobisisobutyronitrile, azobiscyclohexanecarbonitrile, etc. ; peroxides, such as benzoquinone peroxide, acetam peroxide, etc.; photopolymerization initiators, such as diphenyl hydrazine, 2_ mercapto 2_methyl_1_phenyl-propanone _1 _嗣, etc.) 'Based on 100 ίο parts by weight of raw materials, synthesized by bulk polymerization, liquid phase polymerization, emulsion polymerization, suspension polymerization, etc., and preferably in liquid phase The way of polymerization. For liquid phase polymerization, exemplary polymerization liquids include ethyl acetate, toluene, hexane, acetone, and the like. The temperature for the reaction is set at 50 to 150 ° C, and preferably 50 to 15 110 ° C. The time for the reaction is set to 2 to 15 hours, and preferably 7 to 10 hours. In addition, the medium molecular weight and low molecular weight acrylic copolymers are synthesized in the same manner as for the high molecular weight acrylic copolymer, such as bulk polymerization, liquid phase polymerization, emulsion polymerization, suspension polymerization, etc., and Preferably, it is in the form of liquid phase polymerization. The catalyst is a polymerization initiator (azo-polymerization initiator such as azobisisobutyronitrile, azobiscyclohexanecarbonitrile, etc.; peroxide, such as Benzoyl oxime oxide, acetam peroxide, etc.; photopolymerization initiators such as diphenyl ketone, 2-hydroxy-2-methyl-1-phenyl-propan-1-one, etc., to 100 201020303 parts by weight of the raw material monomers, which are synthesized by bulk polymerization, liquid phase polymerization, emulsion polymerization, suspension polymerization, etc., and preferably in the form of liquid phase polymerization. For liquid phase polymerization, exemplary polymerization liquids include ethyl acetate, toluene, hexane, acetone, and the like. The temperature for the reaction is set to 150 ° C, and is preferably from 50 to 110 ° C. The time for the reaction is set to 2 to 15 hours, and preferably 5 to 10 hours. According to the present invention, the adhesive composition for controlling light leakage comprises a high molecular weight acrylic copolymer, a medium molecular weight acrylic copolymer and a crosslinking agent, and 10 can be used with a weathering stabilizer for a typical adhesive. Adhesives, plasticizers, softeners, dyes, pigments, decane coupling agents, inorganic fillers, and the like are further mixed. According to the present invention, the (E) decane coupling agent used in the adhesive composition for controlling light leakage can effectively promote adhesion between the glass substrate and the adhesive, and particularly when left at high temperature and high humidity. Help improve #stick reliability when conditions are met. In view of such an effect, the amount of the decane coupling agent is preferably 〇. 〇丨 to 1. 1 part by weight based on 100 parts by weight of the acrylic acid copolymer. Exemplary sulphur coupling agents include, but are not limited to, vinyl decane, epoxy decane, and methacrylic acid decane. 20 is also an optical film for side-to-side or both sides of a display device, which is provided with an adhesive layer prepared by using an acrylic adhesive composition for an optical film as described above, and The display of the optical film 17 201020303 device. Exemplary display devices include cathode ray tubes (CRTs), liquid crystal displays (LCDs), and plasma display panels (PDPS) and the like. Fig. 1 is a diagrammatic view of a general LCD. Referring to FIG. 1, the LCD includes an LCD panel 500, a first and a fifth optical film 640, 620 for polarizing incident light and directing it - a backlight assembly 700 for generating and providing The incident light is incident on the LCD panel 5, which contains liquid crystal cells 56, which are placed between a pair of transparent panels 520, 540. The first optical film 64 is disposed on the upper side of the LCD panel 500. The second optical film 62 is placed between the LCD panel 5 and the back 10 light assembly 700. The first and second optical films 640, 620 function to separate the incident light into two components perpendicular to each other and transmit one of the two light components to uniformly direct them in the direction of their transport. That is, with respect to the incident light, the first and second optical ridges 640, 620 absorb light oscillating in the same direction as the optical axes of the first and second optical films 64 〇 62 ,, and transmit light oscillating in other directions. In the present case, the polarization axis of the first optical film 640 is perpendicular to the polarization axis of the second optical film 62?. Figure 2 is an extended cross-sectional view in which the area A in the second figure is extended' and illustrates the optical film used in a typical STN or CSTN LCd. In the second embodiment, a polarizing film 26 and a retardation film 16 on the lower side of the polarizing film are stacked between the release film 12 and the protective film 28, and the polarizing film includes a first protective film 20, a polarizing plate 22, and Two transparent protective films 24. In the case of the present invention, the retardation film 16 is bonded by the polarizing film 26, the release film 12, and the first and first adhesive layers 14, 18. The thickness of the adhesive layer thus formed is typically 5 to 100 / a, and preferably 2 to 50 Å after drying. In addition, the optical film for a display device may be a polarizing film, a reflective polarizing film, a retardation film, or the like. Preferably, the optical film for a display device is formed by stacking a polarizing film and a retardation film by an acrylic adhesive composition. The elliptically polarized film produced #. The polarizing film used in the present invention may be a polarizing film 10 which is conventionally known in the art. For example, a 'multilayer film can be used by stacking a transparent protective film, such as a cellulose film, such as 3-cellulose acetate, etc., a polycarbonate film, and a polyester sulfone (p〇lyestersul f one) film. Equal to the polarizing plate produced by the polarizing plate, including a polarizing component, such as an iodine dye or a dichroic dye, etc., 15 in a film of a polyvinyl alcohol resin, such as polyvinyl alcohol, polyethylene glycol , ❹ 15 f ethylene (four) and ethyl acetate B copolymer, etc., and then extend the thin jin. The formation of the adhesive layer in the polarizing film is not limited to a specific method. A diligent method of applying the adhesive directly onto the surface of the polarizing film by means of a coating bar and the like, and then drying the resultant film. However, it is applied by applying an adhesive to the detachable surface of the substrate, and knowing and transferring the synthetic adhesive layer formed on the substrate to the surface of the polarizing film and then aging the film and the adhesive layer. The steps are composed. In addition to the polarizing film of the optical film according to the present invention, there is further included a mere difference layer for causing circular polarization to improve contrast. 1/4 phase 19 201020303 The difference layer may be a polymer film or a layer coated with LC and disposed in the - direction, and may contain both a polymer film and a layer coated with LC. The 1/4 phase difference layer, the bow picks up the phase difference of about 1/4 wavelength of each wavelength in the visible region, and the preferred difference layer is in the control layer of birefringence, penetration and heat resistance. . The material for producing the 1/4 retardation layer is not limited to a specific material...: the right 1/4 retardation layer is a birefringent polymer film comprising a selected from the group consisting of polycarbonate, polycarbonate copolymer, and polyethylene. , polypropylene, poly-borne borneol, polyethylene, polystyrene, polyacrylonitrile, polyacetate, polyphenol, polyarylate, polyvinyl alcohol, polymethacrylate, polyacrylate and fiber 10 At least one of the groups consisting of the esters is preferred. A polymer film composed of a 1/4 retardation layer is preferably a transparent film which is clamped at a ratio of h 丨 to 3 and possibly uniaxially or biaxially positioned. According to the present invention, the film provided with the polarizing film or the retardation film may be stacked with other functional layers such as a protective layer, a reflective layer or an anti-glare layer or the like. In the following, the invention will be described in more detail with reference to the examples and comparative examples, but it should be noted that the following examples illustrate the invention and the scope of the invention is not limited to the embodiments. The acrylic copolymers are first provided with the following list of 20 "parts by weight" for the reaction chambers of Examples 1 to 6', wherein n-butyl acrylate, acrylic acid acrylic acid and (deuterated) propylene Acid_4 is a polymerization monomer, and ethyl acetate of l〇〇g is a solvent and azobisisobutyronitrile (humanization is a polymerization initiator). 201020303 is replaced by nitrogen in the reaction chamber. After the air, the mixture was stirred while raising the temperature of the mixture to 63. (:, and then polymerized in the reaction time shown in the following Table 1. After the polymerization, the resulting mixture was 10 〇g of acetic acid. The ethyl ester is diluted to obtain a solid acrylic acid copolymer liquid phase. In the liquid phase of the polymer 5, the weight of the solid is measured by a solid measuring machine at the initial weight of the adhesive and then evaporated at 30 ° C for 30 minutes. After measurement, the molecular weight of the polymer was measured by a colloidal permeation chromatography (GPC) method. The glass transition temperature was -70 ° C to 2 (TC was heated at a nitrogen gas flow rate of 1 ° C / min Differential sweeping thermal analyzer (DSC) The values measured for the physical properties are shown in the following Table 2. Production of propylene fluorene copolymer For Comparative Examples 1 to 6' The same polymerization method as in the above examples was carried out except that acrylic acid as a polymerization monomer was The mixing ratio of butyl ester, methyl acrylate, acrylic acid and (meth) propionic acid-4- butyl vinegar is carried out as shown in Table 1 below (in units of "parts by weight"). And in addition to the polymerization according to the conditions of π for the polymerization initiator and reaction time as shown in Table 1. Table 1 η~ΒΑ ΑΑ ΑΑ 4-ΗΒΑ AIBN Reaction time (hr) Example 1 98 —— 0 — - - 1 1 0. 015 15 Example 2 98 0 1 1 0. 017 13 Example 3 99 0 1 0 0. 020 8 21 201020303 Example 4 99 0 1 0 0. 022 7 Example 5 93 5 1 1 0. 025 2. 5 Example 6 93 5 1 1 0.27 1.3 Comparative Example 1 84 10 5 1 0. 015 15 Comparative Example 2 74 20 5 1 0. 017 13 Comparative Example 3 54 40 5 0 0. 022 7 Comparison Example 4 44 50 5 0 0. 023 5 Comparative Example 5 54 40 5 0 0.022 2. 3 Comparative Example 6 44 50 5 0 0. 025 1.5 Separately, where "n-BA" stands for " "N-butyl acrylate", "ΜΑ" stands for "methyl acrylate", "ΑΑ" stands for "acrylic acid", "4-ΗΒΑ" stands for "(meth) -4-hydroxybutyl acrylate" and "ΑΙΒΝ" stands for " Azobisisobutyronitrile". 5 Table 2 Solid (wt%) Molecular Weight (Mw) in millions of Tg (°C) Example 1 20.2 2. 50 -53 Example 2 19. 5 2. 23 -52. 5 Example 3 16. 5 1.70 -49. 5 Example 4 15.5 1.50 -48 Example 5 16.3 0.42 -45 Example 6 15.8 0. 33 -46. 2 Comparative Example 1 20.4 2. 39 -42 Comparative Example 2 18. 5 2. 15 -38 22 201020303 Comparative Example 3 14 1. 80 -32 Comparative Example 4 13.5 1.50 -28 Comparative Example 5 13.2 0.39 -33 Comparative Example 6 15. 9 0.31 -25 Example 7 to 14: Production of the application of the adhesive composition First plate 5 10 ❿ 15 The polymers obtained in Examples 1 to 6 were mixed at a mixing ratio as shown in the following Table 3 (in units of "g"), and 2 g of trimethylhexamethylene group. The diamine solid is added as a crosslinking agent to the mixture and stirred to obtain an adhesive composition for producing a polarizing plate. The adhesive composition for producing the polarizing plate thus obtained is applied to a polyester release film and the resultant coated film is dried. In this case, the coating was controlled to a thickness of 25 w after drying. Subsequently, at a temperature of 23. (: After 7 days of aging under a humidity of 45%, the adhesive composition applied to the release film was transferred to a polarizing film of 2 Å to obtain a polarizing plate of the present invention. A polarizing plate provided with the adhesive layer The cut is 21 〇 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 297 One side of the plate. The sample thus obtained was maintained at 7 (rc temperature and 97% humidity for 500 hours to visually observe and evaluate foaming and shedding, and visually observe and evaluate the stain. With - vernier caliper The distance from the position of the adhesive on the long side of the polarizing plate is measured. 23 201020303 To find the knee part of the adhesive composition, lg. aging at 23 ° C and 65% RH The sample composition was placed in a sample vial of the adhesive composition. For the composition, 50 g of ethyl acetate was added and the mixture was stirred for 24 hours. The contents of the sample vial were 2 mesh. The stainless mesh is filtered to separate. The residue on the net is in l〇(TC After drying for 2 hours and drying, the weight was measured. The colloidal portion was then obtained according to the following Equation 1. Equation 1 Colloidal fraction (%) = (weight after drying / weight of the sample adhesive composition) χ 10 100 Measurement The results of the obtained physical properties are shown in the following Table 4. ^feLUJ4: The adhesive is provided to constitute a yttrium γ γ. In addition to the polymers obtained in Comparative Examples 1 to 6, the following list 3 (in g) In addition to the mixing ratio mixing shown in the unit), the polarizing plate was produced substantially in the same manner as in Examples 7 to 14 to measure the physical properties of the polarizing plate. The numerical values of the obtained physical properties are shown in Table 4 below. in.
24 201020303 實施例9 實施例1 100 實施例4 50 實施例5 10 實施例 10 實施例1 100 實施例4 50 實施例6 10 實施例 11 實施例1 100 實施例3 50 實施例5 30 實施例 12 實施例1 100 實施例3 50 實施例6 30 實施例 13 實施例1 100 實施例4 50 實施例5 30 實施例 14 實施例1 100 實施例4 50 實施例6 30 比較例7 比較例1 100 比較例3 50 比較例5 10 比較例8 比較例1 100 比較例3 50 比較例6 10 比較例9 比較例1 100 比較例4 50 比較例5 10 比較例 10 比較例1 100 比較例4 50 比較例6 10 比較例 11 比較例1 100 比較例3 50 比較例5 30 比較例 12 比較例1 100 比較例3 50 比較例6 30 比較例 13 比較例1 100 比較例4 50 比較例5 30 比較例 14 比較例1 100 比較例4 50 比較例6 30 表4 乾熱試驗 乾*溼熱試驗 膠質部 分（¾) (100°C X 500hr) (70°C X 97% X 500hr) 25 20102030324 201020303 Embodiment 9 Embodiment 1 100 Embodiment 4 50 Embodiment 5 10 Embodiment 10 Embodiment 1 100 Embodiment 4 50 Embodiment 6 10 Embodiment 11 Embodiment 1 100 Embodiment 3 50 Embodiment 5 30 Example 12 Example 1 100 Example 3 50 Example 6 30 Example 13 Example 1 100 Example 4 50 Example 5 30 Example 14 Example 1 100 Example 4 50 Example 6 30 Comparative Example 7 Comparative Example 1 100 Comparison Example 3 50 Comparative Example 5 10 Comparative Example 8 Comparative Example 1 100 Comparative Example 3 50 Comparative Example 6 10 Comparative Example 9 Comparative Example 1 100 Comparative Example 4 50 Comparative Example 5 10 Comparative Example 10 Comparative Example 1 100 Comparative Example 4 50 Comparative Example 6 10 Comparative Example 11 Comparative Example 1 100 Comparative Example 3 50 Comparative Example 5 30 Comparative Example 12 Comparative Example 1 100 Comparative Example 3 50 Comparative Example 6 30 Comparative Example 13 Comparative Example 1 100 Comparative Example 4 50 Comparative Example 5 30 Comparative Example 14 Comparative Example 1 100 Comparative Example 4 50 Comparative Example 6 30 Table 4 Dry heat test dry * wet heat test colloidal portion (3⁄4) (100 ° C X 500 hr) (70 ° C X 97% X 500 hr) 25 201020303
*在上述對於結果的表4中，分別地，「〇」代表最佳（脫 落無’起跑：無，漏光：無），「△」代表良好（脫落： 些許’起泡··些許，漏光：些許）及「X」代表差（脫落：多， 起泡：多，漏光：多）。* In Table 4 above for the results, respectively, "〇" stands for the best (falling off no start: no, light leakage: none), and "△" stands for good (falling off: a little 'bubble · a little bit, light leakage: A little) and "X" means poor (falling off: more, foaming: more, light leakage: more).
5 用上述實驗結果，發明者意圖達成本發明之目標，此 即藉由包含反應性高分子量共聚物、反應性中分子量共聚 物及反應性低分子量共聚物之黏著劑組成物的方法’且特 26 201020303 別是藉由低玻璃轉化溫度及低交聯效能之黏著劑的方法， 以減輕收縮應力，以補足漏光性質。特別是，非反應性寡 聚體已被使用於習知技藝之方法中，但反應性中分子量共 聚物及反應性低分子量共聚物兩者係被使用於本發明中以 5 減輕收縮應力而不具切割部上之黏著劑流體或壓縮效應藉 此以補足漏光性質。於本實驗中，收縮係減至最低且不具 切割部上之黏著劑流體或壓縮效應是可見的，其係藉由使 用具有較少數目的官能基之中分子量及低分子量共聚物以 Φ 能補足漏光性質及修正所有其他問題。 10 因此，藉由提供一用於光學薄膜之丙烯酸黏著劑，本 發明係適用於光學薄膜及顯示裝置，其係包含反應性高分 ' 子量共聚物、反應性中分子量共聚物、反應性低分子量共 - 聚物及交聯劑以將因顯示裝置用基材與光學薄膜之黏著劑 間大小變化差異所產生之殘餘應力減至最低。應被注意的 15 是上述實施例係說明而非限制本發明，且熟習此藝者將可 設計許多替代的實施例而不偏離由隨附的申請專利範圍所 # 界定之本發明的範圍。該用語「包含」及其同源字並不排 除那些除了列舉於任一項申請專利範圍或整體說明書之元 件或步驟的存在。 20 【圖式簡單說明】 第1圖係圖示地表示一典型的液晶顯示裝置。5 Using the above experimental results, the inventors intend to achieve the object of the present invention, which is a method comprising an adhesive composition comprising a reactive high molecular weight copolymer, a reactive medium molecular weight copolymer and a reactive low molecular weight copolymer. 26 201020303 It is a method of reducing the shrinkage stress by the method of low glass transition temperature and low cross-linking adhesive to complement the light leakage property. In particular, non-reactive oligomers have been used in the process of the prior art, but both reactive molecular weight copolymers and reactive low molecular weight copolymers have been used in the present invention to reduce shrinkage stress without Adhesive fluid or compression effects on the cutting portion thereby complement the light leakage properties. In this experiment, the shrinkage system was minimized and the adhesive fluid or compression effect on the non-cut portion was visible by using a molecular weight and low molecular weight copolymer having a smaller number of functional groups to complement the Φ Light leakage properties and correct all other issues. 10 Therefore, by providing an acrylic adhesive for an optical film, the present invention is applicable to an optical film and a display device comprising a reactive high-component copolymer, a reactive medium molecular weight copolymer, and low reactivity. The molecular weight co-polymer and the cross-linking agent minimize residual stress caused by the difference in size between the substrate for the display device and the adhesive of the optical film. It is to be noted that the above-described embodiments are illustrative and not limiting, and that many alternative embodiments may be devised without departing from the scope of the invention as defined by the appended claims. The use of the term "comprising" and its conjugates does not exclude the presence of the elements or steps in the 20 [Simple Description of the Drawings] Fig. 1 is a view schematically showing a typical liquid crystal display device.
第2圖顯示一經延展之橫截面圖，其中第1圖中的區域A 係經延展。 【主要元件符號說明】 27 201020303 12:離型膜 14:第一黏著劑層 16:相位差膜 18:第二黏著劑層 20:第一透明保護膜 22:偏光板 24:第二透明保護膜 26:偏光膜 28:保護膜 500: LCD面板 520、540: —對透明面板 560:液晶胞 620:第二光學薄膜 640:第一光學薄膜 700:背光總成Figure 2 shows an extended cross-sectional view in which the area A in Figure 1 is stretched. [Main component symbol description] 27 201020303 12: Release film 14: First adhesive layer 16: Phase difference film 18: Second adhesive layer 20: First transparent protective film 22: Polarizing plate 24: Second transparent protective film 26: polarizing film 28: protective film 500: LCD panel 520, 540: - transparent panel 560: liquid crystal cell 620: second optical film 640: first optical film 700: backlight assembly
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