201011087 六、發明說明： 【發明所屬技術領域】 本發明係關於：來自液晶面板構造之干涉圖型等難以 發生，明亮度·色彩變化少而辨認性優異之液晶顯示裝置 之形成等所適合之光擴散性黏著薄片；其製造方法；適合 作爲前述光擴散性黏著薄片之構成材料之光擴散性黏著劑 組成物；及可使發光二極體（LED )或液晶用背光等光源 φ 均句且平面地發光之光學構件。 【先前技術】 以往，作爲文字處理機、電腦、行動電話、電視等各 種顯示器之光源，一直是使用著採用冷陰極管之液晶用背 光或LED等。然而，由於該等液晶用背光等並非平面且 均勻地發光，因此以原本的狀態使用作爲光源之情況下， 在顯示器上會產生亮度不均勻。 _ 近年來，前述行動電話或電視等製品之薄型化正逐漸 受到重視，伴隨於此，逐漸要求背光或液晶顯示部所使用 之各種光學薄片之薄型化。由於該等光學薄片係重疊而設 置，因此在薄片與薄片之間存在有間隙。在此薄片間之間 隙若存在著變動，則會成爲光學干涉發生之原因，而產生 亮度不均勻、牛頓環、干涉圖型等現象。因此，顯示出的 影像或文字之美觀受損，特別是在亮度低的部分有發生辨 認性降低等不合適之類的情況。 爲了解決上述問題，將含有無機微粒子或有機微粒子 201011087 之塗層藉由塗佈等配設於塑膠薄膜等透明基材之一面而製 作之具有光擴散性之薄片貼附於光源之前面，而製作出可 平面地且均勻地發光之顯示器。另外，此具有光擴散性之 薄片，係於基材之另一面塗佈黏著劑，藉由此黏著劑而貼 附於光源之前面。以關連之先前技術而言，揭示了微粒子 層結合附著於透光性基體上之光學薄片（例如參照專利文 獻1 )。 另外，有一種藉由在黏著劑配合添加劑等而將具有光 擴散性之黏著劑層配設於基材之面上之黏著薄片被提出。 就配合於黏著劑之添加劑而言，以往係使用各種透明的微 粒子。所關連之先前技術，揭示了使具有與黏著劑相異之 折射率之微粒子分散於黏著劑所得到之光擴散性之光學薄 片（例如參照專利文獻2、3 )。 使用將具有光擴散性之黏著劑層配設於基材之面上之 上述黏著薄片之顯示器，被要求爲表現出充分之亮度與影 像對比。爲了使顯示器之亮度與影像對比成爲充分的，有 必要提高黏著薄片之霧度與全光線透過率。此處「霧度」 亦被稱爲「霾度」，係表示膜等模糊程度的指標。入射光 線全部擴散之情況之霧度爲100%。另一方面，「全光線 透過率」係指入射至膜等的光線之中，表示透過光線比例 的指標。入射光線全部透過之情況之全光線透過率爲 100%。亦即，因爲霧度與全光線透過率，係規定相反的 物性之指標，所以兼顧該等一般而言爲困難的。 而對於具有光擴散性之黏著劑層而言，係要求對被黏 -6- 201011087 物的充分黏著力。此外還要求由周邊產生的熱造成之氣體 膨脹等缺陷難以發生。另外，「氣體膨脹」係意指來自基 材或黏著劑之氣體介於黏著薄片與被黏物之間，黏著薄片 之一部份由被黏物浮起的現象。 作爲構成具有光擴散性之黏著劑層之黏著劑，係使用 著溶劑型黏著劑。爲了能對溶劑型黏著劑賦予光擴散性， 有必要添加在事前經過粉體化的高價粉體化粒子作爲添加 Φ 劑。就前述添加劑之具體例而言，可列舉聚苯乙烯等所構 成之有機系微粒子或無機系微粒子。然而，由於有機系微 粒子因爲溶劑的影響而膨脹，因此會有容易發生氣體膨脹 的問題。另外，會有無機系微粒子變成光擴散性不充分的 問題。再者，由於爲了使前述粉體化粒子分散於溶劑型黏 著劑中，特殊的分散設備成爲必要的，而且分散需要時間 ，因此會有生產成本增加的問題。再加上對黏著劑之粒子 分散性差，在製成黏著薄片之情況，光線透過率與擴散性 @ 之平衡爲不充分的。 最近，地球環境保護（抑制揮發性有機化合物排出） 或工作環境之改善、及資源之有效利用等觀點看來，作爲 代替溶劑型黏著劑之水性之乳膠型黏著劑之利用檢討正在 進展著，而揭示了使乳膠型黏著劑含有粒子之黏著薄片（ 例如參照專利文獻4)。然而，此黏著薄片並非具有充分 之亮度、影像對比。加上干涉圖型等抑制效果亦不充分， 黏著特性之耐久性也包含在內，正需要更進一步的改良。 另外，使用前述黏著薄片作爲液晶槽與鄰接之光學構 201011087 件（例如偏光薄膜、觸控面板）貼合用的黏著薄片之情況 ，在貼合失誤發生時，有必要使其由液晶槽側黏著層之界 面剝離。然而，會有由於剝離時之靜電氣的發生爲原因而 塵埃附著，或者隨著使用環境的變化於液晶畫面產生顯示 不均勻等問題。 [先前技術文獻]。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 a diffusing adhesive sheet; a method for producing the same; a light diffusing adhesive composition suitable as a constituent material of the light diffusing adhesive sheet; and a light source φ such as a backlight for a light emitting diode (LED) or a liquid crystal An optical component that emits light. [Prior Art] Conventionally, as a light source for various types of displays such as word processors, computers, mobile phones, and televisions, liquid crystal backlights or LEDs using cold cathode tubes have been used. However, since these liquid crystal backlights and the like are not planar and uniformly emit light, when the light source is used as the light source in the original state, luminance unevenness occurs on the display. In recent years, the thinning of products such as mobile phones and televisions has been receiving attention, and the thickness of various optical sheets used in backlights or liquid crystal display units has been gradually required. Since the optical sheets are arranged to overlap each other, there is a gap between the sheets and the sheets. If there is a change in the gap between the sheets, optical interference occurs, and unevenness in brightness, Newton's ring, and interference pattern occur. Therefore, the appearance of the displayed image or character is impaired, particularly in the case where the brightness is low, and the visibility is lowered. In order to solve the above problem, a coating having an inorganic fine particle or an organic fine particle of 201011087 is attached to a surface of a transparent substrate such as a plastic film by coating or the like, and a light diffusing sheet is attached to the front surface of the light source. A display that emits light in a planar and uniform manner. Further, the light diffusing sheet is coated on the other surface of the substrate with an adhesive, and is attached to the front surface of the light source by the adhesive. In connection with the prior art, it is disclosed that the fine particle layer is bonded to an optical sheet attached to the light-transmitting substrate (for example, refer to Patent Document 1). Further, an adhesive sheet in which a light-diffusing adhesive layer is disposed on a surface of a substrate by an adhesive or the like is proposed. In the past, various transparent microparticles have been used as additives for the adhesive. The related art has disclosed an optical sheet which is obtained by dispersing fine particles having a refractive index different from that of an adhesive to an optical diffusing agent (for example, refer to Patent Documents 2 and 3). A display using the above-mentioned adhesive sheet having a light diffusing adhesive layer disposed on the surface of the substrate is required to exhibit sufficient brightness and image contrast. In order to make the brightness of the display and the image contrast sufficient, it is necessary to increase the haze and total light transmittance of the adhesive sheet. Here, "haze" is also called "twist" and is an indicator indicating the degree of blurring of a film. The haze of the incident light line is 100%. On the other hand, "total light transmittance" is an index indicating the ratio of transmitted light to light incident on a film or the like. The total light transmittance of the incident light is 100%. That is, since the haze and the total light transmittance are indicators of the opposite physical properties, it is generally difficult to balance the above. For the light diffusing adhesive layer, it is required to have sufficient adhesion to the adhered -6-201011087. In addition, it is also required that defects such as gas expansion caused by heat generated by the periphery are hard to occur. Further, "gas expansion" means that a gas from a substrate or an adhesive is interposed between an adhesive sheet and an adherend, and a part of the adhesive sheet is floated by the adherend. As the adhesive constituting the light diffusing adhesive layer, a solvent-based adhesive is used. In order to impart light diffusibility to a solvent-based adhesive, it is necessary to add high-priced powder particles which have been powdered beforehand as an additive Φ agent. Specific examples of the above-mentioned additives include organic fine particles or inorganic fine particles composed of polystyrene or the like. However, since the organic microparticles expand due to the influence of the solvent, there is a problem that gas expansion easily occurs. Further, inorganic fine particles have a problem that the light diffusibility is insufficient. Further, in order to disperse the powdered particles in the solvent-based adhesive, a special dispersing device is necessary, and it takes time to disperse, so there is a problem that the production cost increases. In addition, the dispersibility of the particles of the adhesive is poor, and the balance between the light transmittance and the diffusibility @ is insufficient in the case of forming the adhesive sheet. Recently, the review of the use of water-based latex adhesives as a substitute for solvent-based adhesives is progressing from the viewpoints of global environmental protection (inhibition of volatile organic compound emissions), improvement of the working environment, and efficient use of resources. An adhesive sheet containing particles of a latex type adhesive is disclosed (for example, see Patent Document 4). However, this adhesive sheet does not have sufficient brightness and image contrast. In addition, the suppression effect such as the interference pattern is also insufficient, and the durability of the adhesive property is also included, and further improvement is required. Further, when the adhesive sheet is used as an adhesive sheet for bonding a liquid crystal cell to an adjacent optical member 201011087 (for example, a polarizing film or a touch panel), it is necessary to adhere the liquid crystal cell side when a bonding failure occurs. The interface of the layer is peeled off. However, there is a problem that dust adheres due to the occurrence of static electricity at the time of peeling, or display unevenness occurs on the liquid crystal screen as the environment of use changes. [Previous Technical Literature]
[專利文獻] A 響 [專利文獻1]特許第3509703號公報 [專利文獻2]特開平1 1 -223712號公報 [專利文獻3]特開平1 1 -80688號公報 [專利文獻4]特開2007-2241 86號公報 【發明內容】 本發明係鑑於上述以往技術所具有的問題點而完成， 作爲其課題的部分，在於提供一種光擴散性黏著薄片，係 @ 適合於形成：具備氣體膨脹等不會發生、具有耐久性良好 的黏著性能，同時光線透過率與擴散性之平衡優異，且具 有防帶電性之光擴散黏著層，而且用於使LED或液晶用 背光等光源沒有眩光、均勻且平面地發光之光學構件；構 成沒有來自液晶面板構造之干涉圖型等、明亮度·色彩變 化少而辨認性優異之液晶顯示裝置之光學構件；及可效率 良好地將有機EL面板光源之光線取出之光學構件。 另外，作爲本發明之課題的部分，在於提供一種光擴 -8- 201011087 散性黏著薄片之製造方法，係適合於形成：具備氣體膨脹 等不會發生、具有耐久性良好的黏著性能，同時光線透過 率與擴散性之平衡優異，且具有防帶電性之光擴散黏著層 ，而且用於使led或液晶用背光等光源沒有眩光、均勻 且平面地發光之光學構件；構成沒有來自液晶面板構造之 干涉圖型等、明亮度·色彩變化少而辨認性優異之液晶顯 示裝置之光學構件；及可效率良好地將有機EL面板光源 φ 之光線取出之光學構件。 另外，作爲本發明之課題的部分，在於提供具備氣體 膨脹等不會發生，具有耐久性良好的黏著性能，同時光線 透過率與擴散性之平衡優異，且具有防帶電性之光擴散黏 著層，而且用於使LED或液晶用背光等光源沒有眩光、 均勻且平面地發光之光學構件；構成沒有來自液晶面板構 造之干涉圖型等，明亮度•色彩變化少而辨認性優異之液 晶顯示裝置之光學構件；及可效率良好地將有機EL面板 ❹ 光源之光線取出之光學構件。 另外，作爲本發明之課題的部分，在於提供一種光擴 散性黏著劑組成物，係氣體膨脹等不會發生，可形成具有 耐久性良好的黏著性能，同時光線透過率與擴散性之平衡 優異，且具有防帶電性之光擴散黏著層。 [用於解決課題之方法] 本發明人等爲了達成上述課題專心檢討之結果，發現 藉由使用含有特定之丙烯酸系共聚物、有機系微粒子、硬 201011087 化劑、及4級銨化合物之光擴散性黏著劑組成物，可達成 上述課題，以至於完成本發明。 亦即’依據本發明可提供以下所表示之光擴散性黏著 薄片及其製造方法、光學構件，以及光擴散性黏著劑組成 物。 [1] 一種光擴散性黏著薄片（以下亦稱爲「第一光擴 散性黏著薄片」），係具備··透明塑膠薄膜、與配設於前 述透明塑膠薄膜之至少單面，而且含有包含由丙烯酸系共 聚物（A)所構成之聚合物粒子（A-1)之水系乳膠、有 機系微粒子（B)(但是，前述聚合物粒子（A_l)除外 )、及4級銨化合物（D)之光擴散黏著層、與配設於前 述光擴散黏著層之表面之分隔件。 [2] —種光擴散性黏著薄片（以下亦稱爲「第二光擴 散性黏著薄片」），其係具備：2片分隔件、與被挾持而 配設於前述2片分隔件之間，而且含有包含由丙烯酸系共 聚物（A)所構成之聚合物粒子（A-1)之水系乳膠、有 機系微粒子（B)(但是，前述聚合物粒子（A-1)除外 )、及4級銨化合物（D)之光擴散黏著層。 [3] 如前述[1]或[2]所記載之光擴散性黏著薄片，其中 前述光擴散黏著層爲使含有前述水系乳膠、前述有機系微 粒子（B)、前述4級銨化合物（D)、及可使前述丙烯 酸系共聚物（A)硬化之硬化劑（C)之光擴散性黏著劑 組成物硬化者。 [4] 如前述[1]〜[3]之任一者所記載之光擴散性黏著薄 201011087 片’其中前述丙烯酸系共聚物（A)之質量平均分子量（ Mw)係5萬〜5 00萬、膠體分率係80%以下，殘留於前述 水系乳膠中，而且構成前述丙烯酸系共聚物（A)之單體 之未反應部分之合計濃度係相對於水系乳膠之固體成分爲 l，000ppm 以下。 [5] 如前述[1]〜[4]之任一者所記載之光擴散性黏著薄 片’其中前述有機系微粒子（B)之含有比例係相對於前 φ 述丙烯酸系共聚物（A) 100質量份而言爲0.1〜5 0質量份 〇 [6] 如前述[1]~[5]之任一者所記載之光擴散性黏著薄 片’其中前述有機系微粒子（B)係被包含於水系乳膠， 而且數量平均粒徑爲〇.5〜20μιη之聚合物粒子（B-1)。 [7] 如前述[1]~[6]之任一者所記載之光擴散性黏著薄 片’其中前述丙烯酸系共聚物（Α)之折射率1^與前述有 機系微粒子（Β)之折射率ηΒ之差之絕對値爲0.1〜0.2。 φ [8]如前述[1]〜[7]之任一者所記載之光擴散性黏著薄 片’其中前述4級銨化合物（D )之含有比例係相對於前 述丙烯酸系共聚物（Α) 100質量份而言爲0」〜20質量份 〇 [9]如前述[3]所記載之光擴散性黏著薄片，其中前述 光擴散性黏著劑組成物進一步含有磺化聚合物（Ε)。 Π0]如前述[9]所記載之光擴散性黏著薄片，其中前述 磺化聚合物（Ε)係磺化共軛二烯系聚合物（Ε-1)與聚苯 乙嫌磺酸（Ε-2 )之至少任一者。 -11 - 201011087 [11] 一種光擴散性黏著劑組成物，係含有：包含由丙 烯酸系共聚物（A)所構成之聚合物粒子（A_〇之水系 乳膠與有機系微粒子（B)(但是，前述聚合物粒子（A_ 1)除外）、與可使前述丙烯酸系共聚物（a)硬化之硬 化劑（C )、與4級銨化合物（D )。 [12] —種光擴散性黏著薄片之製造方法（以下亦稱爲 「第一光擴散性黏著薄片之製造方法」），係包含：於透 明塑膠薄膜之至少單面，配設使前述[11]所記載之光擴散 性黏著劑組成物硬化之光擴散黏著層，同時於前述光擴散 ® 黏著層之表面配設分隔件。 [13] 如前述[12]所記載之光擴散性黏著薄片之製造方 法，係將前述光擴散性黏著劑組成物塗佈於透明塑膠薄膜 之至少單面，使塗佈之前述光擴散性黏著劑組成物硬化， 於前述透明塑膠薄膜之前述光擴散黏著層。 [14] 一種光擴散性黏著薄片之製造方法（以下亦稱爲 「第二光擴散性黏著薄片之製造方法」），係包含：於具 _ 有剝離層之2片分隔件之間，將使前述[11]所記載之光擴 散性黏著劑組成物硬化之光擴散黏著層以接觸前述2片分 隔件各自之前述剝離層之方式挾持而配設。 [15] —種光學構件，其係具備透鏡薄片、與配設於前 述透鏡薄片上，而且使前述[11]所記載之光擴散性黏著劑 組成物硬化之光擴散黏著層。 [16] —種光學構件，其係具備：反射型或吸收型偏光 子、與配設於前述反射型或吸收型偏光子上，而且使前述 -12- 201011087 [11]所記載之光擴散性黏著劑組成物硬化之光擴散黏著層 〇 [17] —種光學構件，係具備：透明玻璃板或透明樹脂 板、與配設於前述透明玻璃板或透明樹脂板上，而且使前 述[11]所記載之光擴散性黏著劑組成物硬化之光擴散黏著 層。 [18] 如前述[15]〜[17]之任一者所記載之光學構件，其 φ 中進一步具備配設於前述光擴散黏著層上之透明塑膠薄膜 或分隔件。 本發明之第一及第二光擴散性黏著薄片，會發揮適合 於形成：具備沒有氣體膨脹等發生，具有耐久性良好的黏 著性能，同時光線透過率與擴散性之平衡優異，且具有防 帶電性之光擴散黏著層，而且用於使LED或液晶用背光 等光源沒有眩光、均勻且平面地發光之光學構件；構成沒 有來自液晶面板構造之干涉圖型等，明亮度·色彩變化少 φ 而辨認性優異之液晶顯示裝置之光學構件；及可效率良好 地將有機EL面板光源之光線取出之光學構件這樣的效果 〇 依據本發明之第一及第二光擴散性黏著薄片之製造方 法，可得到一種光擴散性黏著薄片，係適合於形成：具備 沒有氣體膨脹等發生，具有耐久性良好的黏著性能，同時 光線透過率與擴散性之平衡優異，且具有防帶電性之光擴 散黏著層，而且用於使LED或液晶用背光等光源沒有眩 光、均勻且平面地發光之光學構件；構成沒有來自液晶面 -13- 201011087 板構造之干涉圖型等，明亮度•色彩變化少而辨認性優異 之液晶顯示裝置之光學構件；及可效率良好地將有機EL 面板光源之光線取出之光學構件。 依據本發明可提供：用於使LED或液晶用背光等光 源沒有眩光、均勻且平面地發光之光學構件；構成沒有來 自液晶面板構造之干涉圖型等，明亮度•色彩變化少而辨 認性優異之液晶顯示裝置之光學構件；及可效率良好地將 有機EL面板光源之光線取出之光學構件。 本發明之光擴散性黏著劑組成物，會發揮可形成氣體 膨脹等不會發生、具有耐久性良好的黏著性能，同時光線 透過率與擴散性之平衡優異，且具有防帶電性之光擴散黏 著層這樣的效果。 【實施方式】 以下對於本發明之實施之形態作說明，而本發明並非 受到以下之實施之形態所限定，在不脫離本發明旨趣之範 @ 圍，以業界人士通常的知識爲基礎對以下之實施之形態適 當地加上變更、改良等亦算進本發明之範圍是應被理解的 。另外，本說明書中，簡單地稱爲「光擴散性黏著薄片」 時，係意指「第一光擴散性黏著薄片」與「第二光擴散性 黏著薄片」之任一者。 1.光擴散性黏著劑組成物： 本發明之光擴散性黏著劑組成物之一實施形態，係含 -14- 201011087 有包含由丙烯酸系共聚物（A)所構成之聚合物粒子（Α· 1)之水系乳膠、與有機系微粒子（Β)、與可使丙烯酸系 共聚物（Α)硬化之硬化劑（C)、與4級銨化合物（D) 。以下對於其細節作說明。 (丙烯酸系共聚物（Α)) 丙烯酸系共聚物（Α)其質量平均分子量（Mw)爲5 φ 萬~5〇〇萬，其膠體分率爲80%以下，及構成前述丙烯酸 系共聚物（A)之單體之合計濃度係相對於水系乳膠之固 體成分爲Ι,ΟΟΟρριη以下。 丙烯酸系共聚物（Α)之質量平均分子量（Mw)，係 使用凝膠滲透層析裝置（型號「HCL-8020」（東曹公司 製））測定之聚苯乙烯換算之値。由於丙烯酸系共聚物（ A)之質量平均分子量（Mw)在上述數値範圍，本發明之 光擴散性黏著劑組成物會發揮高凝集力。另外，丙烯酸系 Θ 共聚物（A )之質量平均分子量（Mw )係以7萬〜400萬 爲佳’ 10萬〜300萬爲更佳。 另外，丙烯酸系共聚物（A)之質量平均分子量（Mw )/數量平均分子量（Μη)(以下亦稱爲「分子量分散比 」）之値，係以2~50爲佳，而以2.5〜40爲更佳，以 3〜30爲特佳。 丙烯酸系共聚物（Α)之膠體分率，係意指丙烯酸系 共聚物（Α)之全體所含有之四氫呋喃不溶部分之比例。 較具體而言，將試樣Wimg在室溫浸漬於四氫呋喃中1週 -15- 201011087 之後’取出不溶物，使此不溶物於100 °C乾燥3小時，測 定其質量（W2mg)。由^與W2之値，依照下述式（1 )，可算出丙烯酸系共聚物（A)之膠體分率。 膠體分率（％) ^Wz/WalOO. · · · (1) 由於丙烯酸系共聚物（A)之膠體分率爲80%以下， 因此形成光擴散黏著層時，可提高光擴散性黏著劑組成物 對基材（透明塑膠薄膜）之浸透性。另外，丙烯酸系共聚 物（A)之膠體分率係以75%以下爲佳，70%以下爲更佳 〇 相對於水系乳膠之固體成分、殘留於水系乳膠中之構 成前述丙烯酸系共聚物（A)之單體之合計濃度（以下亦 簡單稱爲「殘留單體合計濃度」），係使用氣相層析裝置 (型號「HP6890GC」（Agilent公司製））所測定之値。 藉由每個構成前述丙烯酸系共聚物（A)之單體之各成分 所得到之氣相層析圖譜，由使用既知濃度之單體製作之檢 量線，可求得各成分之定量値。由此各成分之定量値之合 計可得到殘留單體合計濃度。 由於殘留單體合計濃度係相對於水系乳膠之固體成分 爲Ι,ΟΟΟρριη以下，因而可得到透過率高之黏著層，同時 氣體膨脹等不會發生，在高溫、高濕條件下之中，耐久性 良好並且發揮安定的黏著性能。另外，殘留單體合計濃度 係以900ppm爲佳，800ppm以下爲更佳。殘留單體合計 201011087 濃度若相對於水系乳膠之固體成分爲1，〇〇〇ppm以上，則 有無法得到良好的黏著特性，加上還有產生對被黏物之污 染、黏膠殘留的情形。另外，在光擴散性黏著薄片製造時 之乾燥步驟之中，起因於殘留單體成分而產生臭氣的情形 很多，有操作者衛生上的問題發生，由地球環境保護（抑 制揮發性有機化合物排出）或工作環境之改善，以及資源 之有效利用等觀點看來爲不佳。 _ 抑制水系乳膠中之殘留單體合計濃度之方法，可藉由 共聚物之單體組成及添加方法、起始劑、聚合溫度等聚合 條件、或聚合反應結束後之熟成期間及溫度條件適當地調 整。另外，亦可於聚合結束後，設置脫單體處理步驟，藉 由其溫度等諸條件調整。該等之中，特別是倂用起始劑與 還原劑並將聚合溫度降低使其反應，爲適合作爲抑制在共 聚物中殘留之單體量之方法。 丙烯酸系共聚物（A)之玻璃轉移溫度，係以-40 °c以 φ 下爲佳，-90〜-50°C爲更佳。丙烯酸系共聚物（A )之玻璃 轉移溫度若超過-40°C，則有光擴散黏著層對被黏物之黏 著力降低之傾向。玻璃轉移溫度可使用示差掃描熱量計（ 型號「SSC-5000型」（SEIKO電子工業公司製））進行 測定。 以丙烯酸系共聚物（A)構成之聚合物粒子（A-1) 之水系乳膠可藉由使適當之聚合性單體或其混合物，使用 例如氧化還原系聚合起始劑進行乳化聚合等而調製。 就聚合性單體或其混合物而言’只要是可調製丙烯酸 -17- 201011087 系共聚物（A )者，則並未特別受到限定，而以包含含有 羧基之單體之半酯體與甲基丙烯酸之至少任一者聚合性單 體之混合物爲佳。就含有羧基之單體之半酯體之具體例而 言，可列舉馬來酸單烷基酯、伊康酸單烷基酯、苯二甲酸 單[2-(甲基）丙烯醯氧基乙基]酯等。 就聚合性單體之混合物所包含之含有羧基之單體之半 酯體與甲基丙烯酸以外之聚合性單體之具體例而言’可列 舉烷基之碳數爲4~12之丙烯酸烷基酯與烷基之碳數爲 4~ 12之甲基丙烯酸烷基酯之至少任一者所構成之成分（ 以下稱爲「A成分」）；不飽和羧酸（以下稱爲「 Β成分」）；可與該等Α成分及Β成分共聚合的共聚合 性單體（以下稱爲「C成分」）。 就A成分之中，烷基之碳數爲4〜12之丙烯酸烷基酯 之具體例而言，可列舉丙烯酸正丁酯、丙烯酸異丁酯、丙 烯酸第三丁酯、丙烯酸2-乙基己酯、丙烯酸正辛酯、丙 烯酸異壬酯、丙烯酸月桂酯等。另外，就A成分之中， 烷基之碳數爲4〜12之甲基丙烯酸烷基酯之具體例而言， 可列舉甲基丙烯酸正丁酯、甲基丙烯酸異丁酯、甲基丙烯 酸第三丁酯、甲基丙烯酸2·乙基己酯、甲基丙烯酸正辛 酯、甲基丙烯酸異壬酯、甲基丙烯酸月桂酯等。其中尤其 以丙烯酸2-乙基己酯、丙烯酸正丁酯、丙烯酸異壬酯、 及甲基丙烯酸月桂酯爲佳。該等係以單獨一種或組合兩種 以上使用皆可。 聚合性單體之混合物所含之A成分之比例，係以 -18- 201011087 70〜99質量％爲佳，75〜99質量％爲更佳，80〜98質量％爲 特佳。聚合性單體之混合物所含之A成分之比例若在上 述數値範圍外，則有對被黏物之黏著力降低’光擴散黏著 層由被黏物之表面剝離之現象（所謂「浮起」）變得容易 發生之情況。 就B成分之α,θ-不飽和羧酸之具體例而言，可列舉 丙烯酸、甲基丙烯酸、伊康酸、馬來酸、富馬酸、半酯體 φ 等。其中尤其以丙烯酸、甲基丙烯酸、及苯二甲酸單[2-(甲基）丙烯醯氧基乙基]酯爲佳。該等α，/5-不飽和羧酸 係以單獨一種或組合兩種以上使用皆可。 聚合性單體之混合物所含之Β成分之比例係以1.2〜8 質量％爲佳，1.2〜7質量％爲更佳，1.5〜5質量％爲特佳。 聚合性單體之混合物所含之Β成分之比例若在上述數値範 圍外，則有黏著力、耐熱保持力、及貯藏安定性降低之傾 向。 φ 就C成分之具體例而言，可列舉丙烯酸甲酯、甲基丙 烯酸甲酯、乙基丙烯酸酯、甲基丙烯酸乙酯、丙烯酸異丙 酯、甲基丙烯酸異丙酯等烷基之碳數爲3以下之丙烯酸烷 基酯或甲基丙烯酸烷基酯；（甲基）丙烯酸環己酯等（甲 基）丙烯酸環狀烷基酯；（甲基）丙烯酸苯氧基甲酯、（ 甲基）丙烯酸苄酯等（甲基）丙烯酸芳香族酯；丙烯酸羥 烷基酯、甲基丙烯酸羥烷基酯、聚氧乙烯（甲基）丙烯酸 酯、丙烯酸甲氧基乙酯、丙烯酸乙氧基甲酯、丙烯酸縮水 甘油酯、甲基丙烯酸縮水甘油酯等脂肪族（甲基）丙烯酸 -19- 201011087 酯；丙烯醯胺、甲基丙烯醯胺、N-羥甲基丙烯醯胺、N-甲 氧基甲基丙烯醯胺、N-甲氧基丁基丙烯醯胺等（甲基）丙 烯醯胺；乙烯基甲基酮、乙烯基乙基酮、乙烯基正丙基酮 、乙烯基異丙基酮、乙烯基正丁基酮、乙烯基異丁基酮、 乙烯基第三丁基酮、乙烯基苯基酮、乙烯基苄基酮、二乙 烯基酮、二丙酮丙烯醯胺等含有醛基及/或酮基之自由基 聚合性單體；（甲基）丙烯腈、巴豆腈、（甲基）丙烯酸 2-氰乙酯、（甲基）丙烯酸2-氰丙酯、（甲基）丙烯酸 3 -氰丙酯等含有腈基之不飽和化合物；苯乙烯、鄰乙烯基 甲苯、間乙烯基甲苯、對乙烯基甲苯、對乙基乙烯基苯乙 烯、甲基苯乙烯、α-氟苯乙烯等單乙烯基芳香族化合 物；氯乙烯、偏二氯乙烯等鹵化乙烯類；丙酸乙烯酯等乙 烯酯類等。藉由適當地選擇該等C成分，可得到具有因應 於所使用之單體之特性之光擴散性黏著劑組成物。 聚合性單體之混合物所含C成分之比例，係以2 0質 量％以下爲佳。聚合性單體之混合物所含C成分之比例若 超過20質量％，則有對被黏物之黏著力降低，由被黏物 之「浮起」變得容易發生的情形。 藉由將聚合性單體之混合物供給至聚合反應，可製造 丙烯酸系共聚物（Α)。聚合反應係以乳化聚合反應者爲 佳。較具體而言，係以藉由將聚合性單體之混合物與水使 用乳化劑進行乳化’製成預製乳膠之後，藉由氧化還原系 聚合起始劑’通常在不活性環境氣氛下進行聚合反應處理 者爲佳。藉此，可得到以丙烯酸系共聚物（Α)構成之聚 201011087 合物粒子（A_l)之水系乳膠。 另外，將預製乳膠與氧化還原系聚合起始劑連續地供 給至反應系統’同時進行聚合反應，同時在預製乳膠之供 給結束後還繼續供給氧化還原系聚合起始劑，使聚合反應 完成者爲佳。氧化還原系聚合起始劑亦可爲由複數種類之 氧化劑與複數種類之還原劑所構成者，而繼續供給之氧化 還原系聚合起始劑，係以氧化劑與還原劑各含一種爲佳。 Φ 藉由使用氧化還原系聚合起始劑使如上述般地聚合反應進 行’可有效率且高生產性地得到丙烯酸系共聚物（A)。 就氧化劑之具體例而言，可列舉過硫酸鉀、過硫酸鈉 、過硫酸錢等過硫酸鹽；過氧化氫、第三丁基氫過氧化物 、第三丁基過氧馬來酸、過氧化琥珀酸、過氧化苯甲醯基 、茴香素氫過氧化物、二異丙基過氧二碳酸酯、異丙苯基 過氧新癸酸酯、異丙苯基過氧辛酸鹽酯、二異丙基苯氫過 氧化物、對薄荷烷氫過氧化物、2,2-雙（4,4-二第三丁基 φ 過氧環己基）丙烷等過氧化物等。 就還原劑之具體例而言，可列舉硫酸亞鐵、硫酸鐵（ III)等鐵鹽；酸性亞硫酸鈉、亞二硫磺酸鈉、硫代硫酸 鈉、保險粉、抗壞血酸、果糖等還原糖類等。另外，亦可 因應必要倂用乙二胺四醋酸鈉等螯合劑。 就氧化劑與還原劑之適當組合而言，可列舉於下述（ 1)〜（3)所表示之物。 (1) 過硫酸鹽、酸性亞硫酸鈉、及硫酸亞鐵 (2) 第三丁基氫過氧化物、酸性亞硫酸鈉、及硫酸亞鐵 -21 - 201011087 (3)對薄荷烷氫過氧化物、硫酸亞鐵、乙二胺四醋酸鈉 、及甲醛次硫酸鈉 氧化還原系聚合起始劑之使用比例，係以聚合性單體 之混合物之〇.〇1〜5質量％爲佳，0.05-3質量％爲更佳， 0.1〜1質量％爲特佳。 就乳化劑之具體例而言，可列舉聚氧乙烯烷基醚、聚 氧乙烯烷基硫酸酯鹽、聚氧乙烯烷基琥珀酸鈉、月桂基硫 酸鈉、十二烷基苯磺酸鈉等界面活性劑。較具體而言，可 列舉以下以商品名所表示的「LATEMUL S-l 80A」、「 PD-104」（以上爲花王公司製）；「ELEMINOLJS-2」（ 三洋化成公司製）；「AQUARON KH-10」（第一工業製 藥公司製）；「ADEKA REASOAP SE-10N」、「SR-10N 」（以上爲旭電化工業公司製）；「AntoxMS-60」（曰 本乳化劑公司製）；「SURFMER FP-120」（東邦化學工 業公司製）等反應性乳化劑。 乳化劑之使用比例，係以聚合性單體之混合物之 @ 〇.2~7質量％爲佳，0.5~5質量％爲更佳，0.7〜5質量％爲特 佳。藉由適當地選擇乳化劑之種類或使用比例，可得到具 有所希望之平均粒徑之聚合物粒子（A-1)之水系乳膠。 另外，聚合時亦可添加聚有機矽氧烷' 聚二甲基矽氧 烷二醇等改質劑、第三丁基硫醇、第3十二烷基硫醇、硫 乙醇酸辛酯、異丙醇、甲醇、四氯化碳等分子量調節劑、 石蠟系溶劑等各種溶劑、pH調節劑、消泡劑、增黏劑等 -22- 201011087 水系乳膠所含之聚合物粒子（Α-l)之數量平均粒徑 ，係以 50~500nm 爲佳，70~450nm 爲更佳，100~400nm 爲特佳。聚合物粒子（A-1)之數量平均粒徑若未滿5 Onm ，則有光擴散黏著層之黏著力變爲過大之傾向。另一方面 ，聚合物粒子（Α-l)之數量平均粒徑若超過5 0 Onm ’則 有光擴散黏著層之黏著力降低之傾向。另外’聚合物粒子 (Α-l)之數量平均粒徑，可使用商品名「Nanosizer」（[Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art described above, and a part of the problem is to provide a light diffusing adhesive sheet which is suitable for formation without gas expansion or the like. Adhesive property with good durability, excellent balance of light transmittance and diffusibility, anti-chargeable light-diffusing adhesive layer, and light source for LED or liquid crystal backlight without glare, uniform and flat An optical member that emits light from the ground; and an optical member that does not have an interference pattern from a liquid crystal panel structure, has a small degree of brightness and color change, and has excellent visibility, and can efficiently take out light of the organic EL panel light source. Optical components. Further, a part of the problem of the present invention is to provide a method for producing a diffusing adhesive sheet of a light-expanding -8-201011087, which is suitable for forming an adhesive property which does not occur in gas expansion or the like and has excellent durability, and at the same time, light. An optical member having excellent balance between transmittance and diffusibility, and having a light-diffusing adhesive layer having an antistatic property, and an optical member for illuminating a light source such as a backlight for LED or liquid crystal without glare and uniformly and planarly emitting light; An optical member of a liquid crystal display device having excellent visibility and color change, such as an interference pattern and the like, and an optical member capable of efficiently extracting light of the organic EL panel light source φ. In addition, a part of the problem of the present invention is to provide a light-diffusing adhesive layer which is excellent in durability, such as gas expansion and the like, has excellent durability, and has excellent balance between light transmittance and diffusibility, and has antistatic property. In addition, an optical member for illuminating a light source such as an LED or a liquid crystal backlight without glare and uniformly emitting light in a planar manner, and a liquid crystal display device having excellent brightness and color change and excellent visibility without forming an interference pattern from a liquid crystal panel structure. An optical member; and an optical member capable of efficiently extracting light from the organic EL panel and the light source. In addition, a part of the problem of the present invention is to provide a light-diffusing adhesive composition which does not occur in gas expansion or the like, and which has excellent adhesion properties and excellent balance between light transmittance and diffusibility. And it has an anti-charged light diffusion adhesive layer. [Means for Solving the Problems] As a result of intensive review of the above-mentioned problems, the present inventors have found that light diffusion using a specific acrylic copolymer, organic fine particles, hard 201011087, and a 4-grade ammonium compound is used. The adhesive composition can achieve the above problems, so that the present invention can be completed. That is, the light-diffusing adhesive sheet, the method for producing the same, the optical member, and the light-diffusing adhesive composition shown below can be provided according to the present invention. [1] A light-diffusing adhesive sheet (hereinafter also referred to as "first light-diffusing adhesive sheet"), comprising: a transparent plastic film, and at least one side of the transparent plastic film, and comprising The aqueous emulsion of the polymer particles (A-1) composed of the acrylic copolymer (A), the organic fine particles (B) (except for the polymer particles (A-1)), and the 4-stage ammonium compound (D) a light diffusion adhesive layer and a separator disposed on a surface of the light diffusion adhesive layer. [2] A light diffusing adhesive sheet (hereinafter also referred to as "second light diffusing adhesive sheet"), comprising: two separators disposed between the two separators; Further, the aqueous emulsion containing the polymer particles (A-1) composed of the acrylic copolymer (A), the organic fine particles (B) (except for the polymer particles (A-1)), and the fourth stage The light of the ammonium compound (D) diffuses the adhesive layer. [3] The light-diffusing adhesive sheet according to the above [1], wherein the light-diffusing adhesive layer contains the aqueous emulsion, the organic fine particles (B), and the fourth-order ammonium compound (D). And a light-diffusing adhesive composition which hardens the hardening agent (C) which hardens the said acrylic copolymer (A). [4] The light diffusing adhesive thin film 201011087 according to any one of the above [1] to [3] wherein the mass average molecular weight (Mw) of the acrylic copolymer (A) is 50,000 to 500,000 The colloid fraction is 80% or less, and remains in the aqueous latex, and the total concentration of the unreacted portions constituting the monomer of the acrylic copolymer (A) is 10,000 ppm or less with respect to the solid content of the aqueous latex. [5] The light-diffusing adhesive sheet described in any one of the above [1] to [4] wherein the content ratio of the organic fine particles (B) is 100% relative to the front φ acrylic copolymer (A) The light-diffusing adhesive sheet described in any one of the above [1] to [5], wherein the organic fine particles (B) are included in the water system. Latex, and polymer particles (B-1) having a number average particle diameter of 〇.5 to 20 μm. [7] The light-diffusing adhesive sheet according to any one of the above [1] to [6] wherein the refractive index of the acrylic copolymer (Α) and the refractive index of the organic fine particles (Β) The absolute 値 of the difference between ηΒ is 0.1 to 0.2. The light-diffusing adhesive sheet of any one of the above-mentioned [1] to [7] wherein the content ratio of the above-mentioned fourth-order ammonium compound (D) is relative to the above-mentioned acrylic copolymer (Α) 100 [9] The light-diffusing adhesive sheet according to the above [3], wherein the light-diffusing adhesive composition further contains a sulfonated polymer. The light-diffusing adhesive sheet according to the above [9], wherein the sulfonated polymer (Ε) is a sulfonated conjugated diene polymer (Ε-1) and a polyphenylene sulfonic acid (Ε- 2) At least either. -11 - 201011087 [11] A light-diffusing adhesive composition comprising: a polymer emulsion composed of an acrylic copolymer (A) (A_〇 aqueous latex and organic fine particles (B) (but The polymer particles (A-1), and the curing agent (C) capable of curing the acrylic copolymer (a) and the quaternary ammonium compound (D). [12] A light diffusing adhesive sheet The manufacturing method (hereinafter also referred to as "the method of producing the first light-diffusing adhesive sheet") includes: disposing at least one surface of the transparent plastic film, and disposing the light-diffusing adhesive described in the above [11] The hardened light diffuses the adhesive layer, and a spacer is disposed on the surface of the light diffusing adhesive layer. [13] The method for producing a light diffusing adhesive sheet according to the above [12], wherein the light diffusing adhesive is adhered The agent composition is applied to at least one side of the transparent plastic film to cure the coated light diffusing adhesive composition to the light diffusing adhesive layer of the transparent plastic film. [14] A light diffusing adhesive sheet Production method( Also referred to as "the method for producing the second light-diffusing adhesive sheet", the light diffusing adhesive described in the above [11] is composed of two separators having a peeling layer. The light-diffusing adhesive layer of the hardened material is disposed so as to be in contact with the peeling layer of each of the two separators. [15] An optical member comprising a lens sheet and disposed on the lens sheet, and A light-diffusing adhesive layer obtained by curing the light-diffusing adhesive composition according to the above [11]. [16] An optical member comprising: a reflective or absorbing polarizer, and a reflective type or The light-diffusing adhesive layer 硬化[17] which is an optical member of the light-diffusing adhesive composition described in the above-mentioned -12-201011087 [11], which is provided with a transparent glass plate or a transparent resin. a plate, and a light-diffusing adhesive layer which is disposed on the transparent glass plate or the transparent resin plate and which cures the light-diffusing adhesive composition described in the above [11]. [18] As described above [15]~[17 Optically recorded by any of Further, the φ further includes a transparent plastic film or a separator disposed on the light-diffusing adhesive layer. The first and second light-diffusing adhesive sheets of the present invention are suitably formed to have no gas expansion or the like. It has excellent durability and good balance of light transmittance and diffusibility, and has an anti-charged light-diffusing adhesive layer, and is used for light source such as LED or liquid crystal backlight without glare, uniform and planar illumination. An optical member of a liquid crystal display device having excellent visibility and color change without φ and color change, and an optical member capable of efficiently extracting light of an organic EL panel light source; According to the method for producing the first and second light-diffusing adhesive sheets of the present invention, a light-diffusing adhesive sheet can be obtained, which is suitable for formation without adhesion of gas, and has excellent durability. Performance, excellent balance of light transmittance and diffusivity, and anti-charged light An optical member that is used to make a light source such as a backlight for LED or liquid crystal without glare, and emits light uniformly and planarly; constitutes an interference pattern that does not have a plate structure from the liquid crystal surface-13-201011087, and has less brightness and color change. An optical member of a liquid crystal display device having excellent visibility; and an optical member capable of efficiently extracting light from an organic EL panel light source. According to the present invention, it is possible to provide an optical member for illuminating a light source such as a backlight for an LED or a liquid crystal without glare, and to emit light uniformly and planarly; and to form an interference pattern without a structure derived from a liquid crystal panel, and having excellent brightness and color change, and excellent visibility An optical member of the liquid crystal display device; and an optical member capable of efficiently extracting light from the organic EL panel light source. The light-diffusing adhesive composition of the present invention exhibits an adhesive property which does not occur in gas expansion or the like, has excellent durability, and is excellent in balance between light transmittance and diffusibility, and has antistatic property light diffusion adhesion. Layer effect like this. [Embodiment] The following is a description of the embodiments of the present invention, and the present invention is not limited by the following embodiments, and the following is based on the general knowledge of the industry without departing from the scope of the present invention. It is to be understood that the scope of the invention is appropriately changed, modified, and the like. In the present specification, the term "light diffusing adhesive sheet" is used to mean either "first light diffusing adhesive sheet" or "second light diffusing adhesive sheet". 1. Light-diffusing adhesive composition: One embodiment of the light-diffusing adhesive composition of the present invention contains a polymer particle composed of an acrylic copolymer (A) in the range of -14 to 201011087 (Α· 1) A water-based latex, an organic fine particle (Β), a curing agent (C) capable of curing an acrylic copolymer (Α), and a 4-grade ammonium compound (D). The details are explained below. (Acrylic copolymer (Α)) The acrylic copolymer (Α) has a mass average molecular weight (Mw) of 5 φ 50,000 to 50,000, a colloid fraction of 80% or less, and constitutes the acrylic copolymer ( The total concentration of the monomers of A) is Ι, ΟΟΟρριη or less with respect to the solid content of the aqueous latex. The mass average molecular weight (Mw) of the acrylic copolymer (M) is a polystyrene equivalent of a gel permeation chromatography apparatus (Model "HCL-8020" (manufactured by Tosoh Corporation)). Since the mass average molecular weight (Mw) of the acrylic copolymer (A) is in the above range, the light diffusing adhesive composition of the present invention exerts a high cohesive force. Further, the mass average molecular weight (Mw) of the acrylic ruthenium copolymer (A) is preferably from 70,000 to 4,000,000, and more preferably from 100,000 to 3,000,000. Further, the mass average molecular weight (Mw) / number average molecular weight (?η) of the acrylic copolymer (A) (hereinafter also referred to as "molecular weight dispersion ratio") is preferably 2 to 50, and is 2.5 to 40. For better, 3 to 30 is especially good. The colloid fraction of the acrylic copolymer (Α) means the ratio of the tetrahydrofuran-insoluble portion contained in the entire acrylic copolymer (Α). More specifically, the sample Wimg was immersed in tetrahydrofuran at room temperature for 1 week -15 to 201011087, and the insoluble matter was taken out, and the insoluble matter was dried at 100 ° C for 3 hours, and the mass (W 2 mg) was measured. From the relationship between ^ and W2, the colloid fraction of the acrylic copolymer (A) can be calculated according to the following formula (1). Colloid fraction (%) ^Wz/WalOO. · · · (1) Since the colloidal fraction of the acrylic copolymer (A) is 80% or less, the light-diffusing adhesive composition can be improved when the light-diffusing adhesive layer is formed. The permeability of the object to the substrate (transparent plastic film). Further, the colloid fraction of the acrylic copolymer (A) is preferably 75% or less, and 70% or less is more preferably a solid component of the aqueous latex and remains in the aqueous latex to constitute the acrylic copolymer (A). The total concentration of the monomers (hereinafter simply referred to as "the total residual concentration of the residual monomers") is measured by a gas chromatography apparatus (model "HP6890GC" (manufactured by Agilent)). The quantitative enthalpy of each component can be determined from a gas chromatogram obtained by each component constituting the monomer of the acrylic copolymer (A) from a calibration line prepared using a monomer having a known concentration. Thus, the total amount of residual monomers can be obtained by the total amount of the quantitative enthalpy of each component. Since the total concentration of the residual monomers is Ι, ΟΟΟρριη or less with respect to the solid content of the aqueous emulsion, an adhesive layer having a high transmittance can be obtained, and gas expansion or the like does not occur, and durability is high in high-temperature and high-humidity conditions. Good and play a stable adhesive performance. Further, the total concentration of the residual monomers is preferably 900 ppm, more preferably 800 ppm or less. When the concentration of the residual monomer is 1, 〇〇〇ppm or more with respect to the solid content of the aqueous latex, good adhesion characteristics are not obtained, and contamination of the adherend or adhesion of the adhesive remains. In addition, in the drying step in the production of the light-diffusing adhesive sheet, there are many cases in which an odor is generated due to the residual monomer component, and there is a problem in the hygiene of the operator, and environmental protection by the earth (inhibition of volatile organic compound discharge) ) or the improvement of the working environment and the effective use of resources seem to be poor. _ The method of suppressing the total concentration of residual monomers in the aqueous latex can be appropriately determined by the monomer composition and the addition method of the copolymer, the polymerization conditions such as the initiator, the polymerization temperature, or the ripening period and temperature conditions after the completion of the polymerization reaction. Adjustment. Further, after the completion of the polymerization, a demonomerization treatment step may be provided, and the conditions such as the temperature thereof may be adjusted. Among these, in particular, a method in which an initiator and a reducing agent are used and the polymerization temperature is lowered to cause a reaction is suitable as a method for suppressing the amount of the monomer remaining in the copolymer. The glass transition temperature of the acrylic copolymer (A) is preferably -40 ° C in φ, more preferably -90 to -50 ° C. When the glass transition temperature of the acrylic copolymer (A) exceeds -40 ° C, the adhesion of the light-diffusing adhesive layer to the adherend tends to decrease. The glass transition temperature can be measured using a differential scanning calorimeter (model "SSC-5000" (manufactured by SEIKO Electronics Co., Ltd.)). The aqueous latex of the polymer particles (A-1) composed of the acrylic copolymer (A) can be prepared by subjecting a suitable polymerizable monomer or a mixture thereof to emulsion polymerization using, for example, a redox polymerization initiator. . The polymerizable monomer or a mixture thereof is not particularly limited as long as it can prepare the acrylic acid-17-201011087-based copolymer (A), and the half ester body and the methyl group containing the monomer having a carboxyl group are not particularly limited. A mixture of at least one of the polymerizable monomers of acrylic acid is preferred. Specific examples of the half ester body of the monomer having a carboxyl group include a monoalkyl maleate, a monoalkyl isonate, and a mono [2-(methyl) propylene oxide B. Base] ester and the like. In the specific example of the half ester body of the carboxyl group-containing monomer and the polymerizable monomer other than methacrylic acid contained in the mixture of the polymerizable monomers, an alkyl group having an alkyl group having 4 to 12 carbon atoms can be cited. a component composed of at least one of an ester and an alkyl group having a carbon number of 4 to 12 alkyl methacrylate (hereinafter referred to as "A component"); an unsaturated carboxylic acid (hereinafter referred to as "anthracene component") A copolymerizable monomer (hereinafter referred to as "C component") copolymerizable with the ruthenium component and the ruthenium component. Specific examples of the alkyl acrylate having an alkyl group having 4 to 12 carbon atoms among the components A include n-butyl acrylate, isobutyl acrylate, tributyl acrylate, and 2-ethyl acrylate. Ester, n-octyl acrylate, isodecyl acrylate, lauryl acrylate, and the like. Further, among the specific components of the A component, the alkyl methacrylate having an alkyl group having 4 to 12 carbon atoms may, for example, be n-butyl methacrylate, isobutyl methacrylate or methacrylic acid. Tributyl ester, 2-ethylhexyl methacrylate, n-octyl methacrylate, isodecyl methacrylate, lauryl methacrylate, and the like. Among them, 2-ethylhexyl acrylate, n-butyl acrylate, isodecyl acrylate, and lauryl methacrylate are preferred. These may be used alone or in combination of two or more. The ratio of the component A contained in the mixture of the polymerizable monomers is preferably -18 to 201011087, 70 to 99% by mass, more preferably 75 to 99% by mass, and particularly preferably 80 to 98% by mass. When the ratio of the component A contained in the mixture of the polymerizable monomers is outside the above range, the adhesion to the adherend is lowered, and the light-diffusing adhesive layer is peeled off from the surface of the adherend (so-called "floating" ") It is easy to happen. Specific examples of the α-, θ-unsaturated carboxylic acid of the component B include acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid, and a half ester φ. Among them, acrylic acid, methacrylic acid, and mono-[2-(methyl)acryloxyethyl ester of phthalic acid are preferred. These α,/5-unsaturated carboxylic acids may be used alone or in combination of two or more. The ratio of the cerium component contained in the mixture of the polymerizable monomers is preferably 1.2 to 8 mass%, more preferably 1.2 to 7% by mass, and particularly preferably 1.5 to 5% by mass. When the proportion of the bismuth component contained in the mixture of the polymerizable monomers is outside the above range, the adhesion, the heat-resistant retention, and the storage stability are lowered. φ Specific examples of the C component include carbon numbers of alkyl groups such as methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, isopropyl acrylate, and isopropyl methacrylate. a alkyl acrylate or alkyl methacrylate of 3 or less; a cyclic alkyl (meth) acrylate such as cyclohexyl (meth) acrylate; phenoxymethyl (meth) acrylate; Alkenyl (meth)acrylate such as benzyl acrylate; hydroxyalkyl acrylate, hydroxyalkyl methacrylate, polyoxyethylene (meth) acrylate, methoxyethyl acrylate, ethoxy acrylate Aliphatic (meth)acrylic acid such as ester, glycidyl acrylate or glycidyl methacrylate-19-201011087 ester; acrylamide, methacrylamide, N-methylol acrylamide, N-methoxy (meth) acrylamide such as methacrylamide or N-methoxybutyl acrylamide; vinyl methyl ketone, vinyl ethyl ketone, vinyl n-propyl ketone, vinyl isopropyl Ketone, vinyl n-butyl ketone, vinyl isobutyl ketone, ethylene a radical polymerizable monomer containing an aldehyde group and/or a ketone group such as a third butyl ketone, a vinyl phenyl ketone, a vinyl benzyl ketone, a divinyl ketone or a diacetone acrylamide; (meth) propylene Nitrile-containing unsaturated compounds such as nitrile, crotononitrile, 2-cyanoethyl (meth)acrylate, 2-cyanopropyl (meth)acrylate, 3-cyanopropyl (meth)acrylate; styrene, neighbor Monovinyl aromatic compounds such as vinyl toluene, m-vinyl toluene, p-vinyl toluene, p-ethylvinyl styrene, methyl styrene, α-fluorostyrene; vinyl halides such as vinyl chloride and vinylidene chloride Class; vinyl esters such as vinyl propionate. By appropriately selecting these C components, a light diffusing adhesive composition having characteristics depending on the monomer to be used can be obtained. The proportion of the component C contained in the mixture of the polymerizable monomers is preferably 20% by mass or less. When the ratio of the component C contained in the mixture of the polymerizable monomers exceeds 20% by mass, the adhesion to the adherend may be lowered, and the "floating" of the adherend may easily occur. An acrylic copolymer (?) can be produced by supplying a mixture of polymerizable monomers to a polymerization reaction. The polymerization reaction is preferably an emulsion polymerization reaction. More specifically, after the pre-formed latex is prepared by emulsifying a mixture of a polymerizable monomer and water with an emulsifier, the polymerization reaction is usually carried out in an inert atmosphere by a redox polymerization initiator. The processor is better. Thereby, an aqueous latex of the polymerized 201011087 composite particles (A-1) composed of an acrylic copolymer (Α) can be obtained. Further, the pre-formed latex and the redox polymerization initiator are continuously supplied to the reaction system to simultaneously carry out the polymerization reaction, and at the same time, the supply of the redox polymerization initiator is continued after the supply of the pre-formed latex is completed, so that the polymerization reaction is completed. good. The redox polymerization initiator may be one composed of a plurality of types of oxidizing agents and a plurality of types of reducing agents, and the redox polymerization initiator to be continuously supplied is preferably one of an oxidizing agent and a reducing agent. Φ The polymerization reaction as described above is carried out by using a redox polymerization initiator to obtain the acrylic copolymer (A) efficiently and with high productivity. Specific examples of the oxidizing agent include persulfates such as potassium persulfate, sodium persulfate, and persulfate; hydrogen peroxide, t-butyl hydroperoxide, and t-butyl peroxymaleic acid; Oxidized succinic acid, benzammonium peroxide, anisidine hydroperoxide, diisopropyl peroxydicarbonate, cumene peroxy neodecanoate, cumyl peroxyoctanoate, two Examples of isopropyl benzene hydroperoxide, p-menthan hydroperoxide, and peroxides such as 2,2-bis(4,4-di-t-butyl φ-peroxycyclohexyl)propane. Specific examples of the reducing agent include iron salts such as ferrous sulfate and iron (III) sulfate; reducing sugars such as acidic sodium sulfite, sodium sulfite, sodium thiosulfate, insurance powder, ascorbic acid, and fructose. Further, a chelating agent such as sodium ethylenediaminetetraacetate may be used as necessary. The appropriate combination of the oxidizing agent and the reducing agent can be exemplified by the following items (1) to (3). (1) Persulfate, acid sodium sulfite, and ferrous sulfate (2) tert-butyl hydroperoxide, acid sodium sulfite, and ferrous sulfate-21 - 201011087 (3) p-menthane hydroperoxide, sulfuric acid The ratio of use of iron, ethylenediaminetetraacetic acid sodium, and sodium formaldehyde sulfoxylate redox polymerization initiator is preferably 〇1 to 5 mass%, 0.05-3 mass% of the mixture of polymerizable monomers. For better, 0.1 to 1% by mass is particularly good. Specific examples of the emulsifier include polyoxyethylene alkyl ether, polyoxyethylene alkyl sulfate, sodium polyoxyethylene alkyl succinate, sodium lauryl sulfate, sodium dodecyl benzene sulfonate, and the like. Surfactant. Specifically, "LATEMUL Sl 80A" and "PD-104" (the above are manufactured by Kao Corporation); "ELEMINOL JS-2" (made by Sanyo Chemical Co., Ltd.); "AQUARON KH-10" (made by Daiichi Chemical Co., Ltd.); "ADEKA REASOAP SE-10N", "SR-10N" (above is manufactured by Asahi Denki Kogyo Co., Ltd.); "AntoxMS-60" (manufactured by Sakamoto Emulsifier Co., Ltd.); "SURFMER FP- 120" (made by Toho Chemical Industry Co., Ltd.) and other reactive emulsifiers. The proportion of the emulsifier used is preferably 〇. 2 to 7 mass% of the mixture of the polymerizable monomers, more preferably 0.5 to 5% by mass, and particularly preferably 0.7 to 5% by mass. By appropriately selecting the kind or ratio of the emulsifier, an aqueous latex of the polymer particles (A-1) having a desired average particle diameter can be obtained. In addition, a polyorganosiloxane or a modifier such as polydimethyloxanediol, a third butyl thiol, a thirtythyl thiol, an octyl thioglycolate, or an isopropyl group may be added during the polymerization. A molecular weight modifier such as an alcohol, a methanol or a carbon tetrachloride, a solvent such as a paraffin solvent, a pH adjuster, an antifoaming agent, an adhesion promoter, etc.-22-201011087 Polymer particles (Α-l) contained in a water-based latex The number average particle diameter is preferably 50 to 500 nm, more preferably 70 to 450 nm, and particularly preferably 100 to 400 nm. When the number average particle diameter of the polymer particles (A-1) is less than 5 Onm, the adhesion of the light-diffusing adhesive layer tends to be excessive. On the other hand, if the number average particle diameter of the polymer particles (Α-1) exceeds 50 Onm', the adhesion of the light-diffusing adhesive layer tends to decrease. In addition, the number average particle diameter of the polymer particles (Α-l) can be used under the trade name "Nanosizer" (
Beckman Coulter公司製）進行測定。 (有機系微粒子（B)) 有機系微粒子（B)只要是主要由有機物質所構成之 微粒子即可，而具體而言，可舉水系乳膠之聚合物粒子（ B _ 1 )作爲適合例。 就聚合物粒子（B-1)而言，並未受到球狀粒子限制 ，具有什麼樣的形狀皆可，具有橢圓形、不倒翁型等形狀 φ 的奇特形狀粒子亦可。 聚合物粒子（B_l)之數量平均粒徑係以0.5〜20μιη爲 佳，1〜15μιη爲更佳，2〜ΙΟμπι爲特佳。聚合物粒子（Β-1 )之數量平均粒徑若未滿〇.5μιη，則有變得難以使光線充 分地散射之傾向。另一方面，聚合物粒子（Β-1)之數量 平均粒徑若超過20μιη，則有全光線透過率容易變低，另 外還有藉由種子乳化聚合製造變得困難之傾向。另外，「 數量平均粒徑」，係藉由光散射法所測定之値。 聚合物粒子（Β-1)係以包含來自芳香族乙烯基系單 -23- 201011087 體之構成單位（bl)者爲佳。聚合物粒子（Β-l)所含之 構成單位（bl)之比例，在將聚合物粒子（B-1)所含之 全構成單位之合計定爲100質量％之情況下’係以50〜1〇〇 質量％爲佳，70~100質量％爲更佳，80~100質量％爲特佳 。構成單位（b 1 )之含有比例若未滿5 0質量％，則聚合 物粒子（Β-l)之折射率與丙烯酸系共聚物（A)之折射 率之差變小，變得難以充分地使光線擴散，同時有聚合安 定性降低之傾向。 秦 就爲了構築構成單位（bl)可使用之芳香族乙烯基系 單體之具體例而言，可列舉苯乙烯、α -甲基苯乙烯、乙 烯基甲苯、對甲基苯乙烯、2-甲基苯乙烯、3-甲基苯乙烯 、4-甲基苯乙烯、4-乙基苯乙烯、4-第三丁基苯乙烯、 3,4-二甲基苯乙烯、4-甲氧基苯乙烯、4-乙氧基苯乙烯、 2-氯苯乙烯、3-氯苯乙烯、4-氯苯乙烯、2,4-二氯苯乙烯 、2，6-二氯苯乙烯、4·氯-3-甲基苯乙烯、二乙烯基苯、1-乙烯基萘、2-乙烯基吡啶、4-乙烯基吡啶等。其中尤其以 @ 苯乙烯、二乙烯基苯、α -甲基苯乙烯爲佳。該等芳香族 乙烯基系單體係以單獨一種或組合兩種以上使用皆可。 聚合物粒子（Β-l)，除了構成單位（bl)以外，係 以因應必要包含來自可與各種芳香族乙烯基系單體共聚合 的其他單體之構成單位（b2)者爲佳。就爲了構成此構成 單位（b2)可使用之「其他單體」之具體例而言，可列舉 (甲基）丙烯酸甲酯、（甲基）丙烯酸乙酯、（甲基）丙 烯酸丙酯、（甲基）丙烯酸正己酯、（甲基）丙烯酸2- -24- 201011087 乙基己酯、（甲基）丙烯酸環己酯等（甲基）丙烯酸（環 )烷酯類；（甲基）丙烯酸2-甲氧基乙酯、（甲基）丙 烯酸對甲氧基環己酯等（甲基）丙烯酸烷氧基（環）烷酯 類；三羥甲基丙烷三（甲基）丙烯酸酯等多價（甲基）丙 烯酸酯類；醋酸乙烯酯、丙酸乙烯酯、Versatic酸乙烯酯 等乙烯酯類；N-羥甲基（甲基）丙烯醯胺、N，N-二羥甲基 (甲基）丙烯醯胺等N-羥甲基化不飽和羧酸醯胺類；2-φ 二甲基胺基乙基丙烯醯胺等含有胺基烷基之丙烯醯胺類； (甲基）丙烯醯胺、N-甲氧基甲基（甲基）丙烯醯胺、 Ν,Ν-乙烯雙（甲基）丙烯醯胺、馬來醯胺、馬來醯亞胺等 不飽和羧酸之醯胺類及醯亞胺類；Ν-甲基丙烯醯胺、Ν，Ν-二甲基丙烯醯胺等Ν-單烷基（甲基）丙烯醯胺及Ν，Ν-二 烷基丙烯醯胺類；（甲基）丙烯酸2-二甲基胺基乙酯等 含有胺烷基之（甲基）丙烯酸酯類；（甲基）丙烯酸2-(二甲基胺基乙氧基）乙酯等含有胺基烷氧基烷基之（甲 φ 基）丙烯酸酯類；氯乙烯、偏二氯乙烯、脂肪酸乙烯酯等 鹵化乙烯化合物類；1，3-丁二烯、2-甲基-1，3-丁二烯、2-氯-1，3-丁二烯、2,3-二甲基-1，3-丁二烯等共軛二烯化合物 類；（甲基）丙烯酸、巴豆酸、桂皮酸、馬來酸、馬來酸 酐、富馬酸、伊康酸、伊康酸酐、馬來酸單甲酯、馬來酸 單乙酯、伊康酸單甲酯、伊康酸單乙酯、六氫苯二甲酸 單-2-(甲基）丙烯醯氧基乙基酯等含有羧基之不飽和單 體及其酐類；（甲基）丙烯腈、巴豆腈、桂皮酸腈等氰乙 烯基系單體；（甲基）丙烯酸2-氰乙酯、（甲基）丙稀 -25- 201011087 酸2·氰丙酯、（甲基）丙烯酸3-氰丙酯、（甲基）丙嫌 酸羥甲酯、（甲基）丙烯酸2-羥乙酯、（甲基）丙稀酸 6-羥己酯、（甲基）丙烯酸4-羥環己酯、新戊二醇單（甲 基）丙烯酸酯等羥（環）烷基單（甲基）丙烯酸酯類；（ 甲基）丙烯酸3-氯-2-羥丙酯、（甲基）丙烯酸3·胺基- 2-羥丙酯等取代羥（環）烷基單（甲基）丙烯酸醋類；其他 還有烯丙基縮水甘油醚、（甲基）丙烯酸縮水甘油醋、甲 基縮水甘油基甲基丙烯酸酯、（甲基）丙烯酸環氧化環己 酯等。 有機系微粒子（Β)之含有比例係以相對於丙烯酸系 共聚物（Α) 100質量份爲0.1〜50質量份爲佳，〇.5〜40質 量份爲更佳，1〜35質量份爲特佳。若相對於丙嫌酸系共 聚物（Α) 100質量份有機系微粒子（Β)之含有比例未滿 0.1質量份，則有霧度變低之傾向。另一方面，若超過50 質量份，則有全光線透過率變低，黏著力降低之傾向。 丙烯酸系共聚物（Α)之折射率ηΑ與有機系微粒子（ @ Β )之折射率Ι1Β之差之絕對値|ηΑ-ηΒ|係以0.1〜0.2爲佳， 0.1-0.17爲更佳。|ηΑ-ηΒ|若未滿0.1，則有無法得到充分 之光擴散性能之傾向，在顯示器上亮度不均勻變得容易發 生。另一方面，|ηΑ-ηΒ|若超過0.2，則由於全光線透過率 變小，因此有顯示器之亮度降低之傾向。 有機系微粒子（Β)，只要是具有種子粒子所構成之 中心部、與含有來自折射率相異之2種以上之聚合性單體 之構成單位，而且使折射率由種子粒子之表面向外側連續 -26- 201011087 地或階段地變化之表層部之粒子即可。此情況下，表層部 之最內殻部分之折射率ΠΒ0與表層部之最外殻部分之折射 率 nBP之差之絕對値|nB0-nBP|係以 〇.〇1〜0.15爲佳， 0.02〜0.1爲更佳。|nB0-nBP|若未滿〇.〇1，則成爲與粒子內 之折射率沒有變化的均勻粒子同等光學特性，|nBO-nBP|若 超過0.15，則有全光線透過率降低之虞。 另外，丙烯酸系共聚物（A)之折射率nA與有機系微 φ 粒子（B)之表層部之最內殼部分之折射率nB0之差之絕 對値|nA-nB0丨係以 0.1〜0.2爲佳，0.1〜0.17爲更佳。|nA-nBO|若未滿0.1，則有無法得到充分之光擴散性能之傾向 ，丨nA-nB0|若超過0.2，則有全光線透過率變小之虞。丙烯 酸系共聚物（A)之折射率nA與有機系微粒子（B)之表 層部之最外殼部分之折射率nBP之差之絕對値|nA-nBP|， 係以0.03以下爲佳，0.02以下爲更佳。藉著減小 Ιπα-χιβρΙ ’可抑制在丙烯酸系共聚物（Α)與有機系微粒子（Β) φ 之粒子表面所發生的光線散射（後方散射），可得到較爲 良好的透過率。 (種子乳化聚合） 聚合物粒子（B-1)，係以藉由使苯乙烯系聚合物之 單分散粒子吸收聚合性單體，在第一自由基聚合起始劑之 存在下，使其進行時之種子乳化聚合（以下亦稱爲「種子 聚合」）而得到之第一乳化聚合粒子（以下亦稱爲「聚合 物粒子（i)」）者爲佳。單分散粒子可藉由使用水性媒 -27- 201011087 體之通常之乳化聚合方法而得到。單分散粒子之數量平均 粒徑，係以0·05〜1.5μιη爲佳，〇.1~1μιη爲更佳。 就單分散粒子之具體例而言，可列舉單分散聚苯乙烯 粒子。單分散粒子之質量平均分子量（Mw)係以 500〜20,000 爲佳，5 00〜1 5,000 爲更佳，500-1 0,000 爲特 佳。另外，單分散粒子之質量平均分子量（Mw)，係藉 由凝膠滲透層析（GPC )所測定之聚苯乙烯換算之値。 單分散粒子所吸收之聚合性單體，只要是可與各種單 ^ 體共聚合者，則並無特別限制。就單分散粒子所吸收之聚 合性單體之具體例而言，可列舉與上述「芳香族乙烯基系 單體」之具體例所例示之物相同者。 種子聚合可依照周知的方法進行。例如將使用之單體 之全量定爲100質量份之情況，通常可在使用10 0〜5 00份 之水，聚合溫度-10~100°C (宜爲-5〜100°c，較佳爲〇~9 0 °C )、聚合時間0.1〜30小時（宜爲2〜25小時）之條件進 行。就種子聚合之方式而言，可採用將單體整批裝入之批 Q 次方式、將單體分批或連續供給之方式、將單體之預製乳 膠分批或連續添加之方式，或將該等方式階段性地組合之 方式等。另外，可因應必要使用通常之乳化聚合所使用之 分子量調節劑、螯合化劑、無機電解質等一種以上。 就第一自由基聚合起始劑之具體例而言，可列舉過硫 酸鉀、過硫酸銨等過硫酸鹽；過氧化苯甲醯基、月桂醯基 過氧化物、第三丁基過氧-2-乙基已酸酯等有機過氧化物 ;偶氮雙異丁腈、二甲基-2，2’_偶氮雙異丁酸酯、2-胺甲 -28- 201011087 醯基氮雜異丁腈等偶氮化合物；含有具有過氧基之自由基 乳化性化合物之自由基乳化劑；組合亞硫酸氫鈉、及硫酸 亞鐵等還原劑之氧化還原系等。另外，在使用乳化劑之情 況之中，就此乳化劑之具體例而言，可列舉選自周知的陰 離子性乳化劑、非離子性乳化劑、及兩性乳化劑所構成之 群中一種以上者。另外，亦可使用在分子內具有不飽和雙 鍵之反應性乳化劑等。 _ 對於種子乳化聚合所使用之分子量調節劑而言，並無 特別限制。就分子量調節劑之具體例而言，可列舉正己基 硫醇、正辛基硫醇、正十二烷基硫醇、第3十二烷基硫醇 、正十六烷基硫醇、正十四烷基硫醇、第3十四烷基硫醇 、硫乙醇酸等硫醇類；二甲基黃原素二硫醚、二乙基黃原 素二硫醚、二異丙基黃原素二硫醚等黃原素二硫醚類；四 甲基秋蘭姆二硫醚、四乙基秋蘭姆二硫醚、四丁基秋蘭姆 二硫醚等秋蘭姆二硫醚類；氯仿、四氯化碳、四溴化碳、 φ 溴乙烯等鹵化烴類；五苯基乙烷、α -甲基苯乙烯2聚物 等烴類；其他還有丙烯醛、甲基丙烯醛、烯丙基醇、硫代 乙醇酸2-乙基己酯、萜品油烯、α -萜品烯、r -萜品烯、 二戊烯、1，1-二苯乙烯等。該等分子量調節劑以單獨一種 或組合兩種以上使用皆可。該等之中，係以硫醇類、黃原 素二硫醚類、秋蘭姆二硫醚類、1,1-二苯乙烯、α-甲基苯 乙烯2聚物等爲佳。 藉由上述種子聚合所得到之聚合物粒子（〇 ，通常 爲球狀之粒子。聚合物粒子（i)之數量平均粒徑係以 -29- 201011087 0_1〜Ιμπι爲佳’ 0.2〜0·7μιη爲更佳。聚合物粒子（i)之數 量平均粒徑若在此數値範圍外，則有聚合安定性降低的情 形。 聚合物粒子（B-1)，係以藉由使上述第一乳化聚合 粒子（聚合物粒子（i))吸收聚合性單體，在第二自由 基聚合起始劑之存在下，進一步使其種子聚合，所得到之 第二乳化聚合粒子（以下亦稱爲「聚合物粒子（ii)」） 者爲佳。亦即，此聚合物粒子（ii)可藉由使用聚合物粒 子（i)作爲種子聚合物粒子，使聚合性單體種子聚合而 製造。 種子聚合只要於例如使聚合物粒子（i)分散之水性 媒體中，將聚合性單體或其預製乳膠整批、分批、或連續 滴下而實施即可。在種子聚合所使用之聚合物粒子（i) 之量，係相對於聚合性單體100質量％定爲1~100質量％ 爲佳，定爲2〜80質量％爲更佳。第二自由基聚合起始劑 ，與於聚合物粒子（i)之製造時所使用之第一自由基聚 _ 合起始劑相同或相異皆可。另外，種子聚合時使用乳化劑 之情況之中，此乳化劑與聚合物粒子（i)之製造時所使 用之乳化劑相同或相異皆可。另外，關於聚合時間等反應 條件，係與聚合物粒子（i )之製造時相同。如以上之方 式所得到之聚合物粒子（ii)通常爲球狀之粒子。 再者，聚合物粒子（B-1)，係以藉由使上述第二乳 化聚合粒子（聚合物粒子（ii))吸收聚合性單體，在第 3自由基聚合起始劑之存在下，進一步使其種子聚合，所 -30- 201011087 得到之第三乳化聚合粒子（以下亦稱爲「聚合物粒子 )」）爲佳。亦即，藉由使種子聚合多次（複數階段）重 覆，製成所希望之粒徑，可得到粒徑分布變動係數（CV 値）小的聚合物粒子（B-1)。另外，種子聚合之重覆階 段數係以定爲3階段以上爲佳。 另外，藉由適當地選擇供應上述聚合物粒子（B-1) 之各構成單位之聚合性單體之聚合轉化率以及於種子聚合 ^ 粒子加成聚合之聚合性單體之種類，可得到不倒翁型之奇 特形狀粒子。 (硬化劑（C )) 硬化劑（C)係可使丙烯酸系共聚物（A)硬化，作 爲所謂交聯劑而發揮機能之成分，而可使用周知的交聯劑 作爲硬化劑（C )。 就作爲硬化劑（C)所可使用交聯劑之具體例而言， _ 可列舉多官能之異氰酸酯系交聯劑或環氧系交聯劑、噁唑 啉系交聯劑、氮丙啶系交聯劑、金屬螯合系交聯劑、己二 酸二醯肼等二醯肼化合物等。該等交聯劑以單獨一種或組 合兩種以上使用皆可。另外，交聯劑爲油溶性與水溶性之 任一者皆可。 就環氧系交聯劑而言，係以含有2個以上之環氧基之 多縮水甘油基化合物爲佳。就具體例而言，可列舉乙二醇 二縮水甘油醚、聚乙二醇二縮水甘油醚、丙二醇二縮水甘 油醚、聚丙二醇二縮水甘油醚、新戊二醇二縮水甘油醚、 -31 - 201011087 1，6-己二醇二縮水甘油醚、二溴新戊二醇二縮水甘油醚、 鄰苯二甲酸二縮水甘油酯、甘油多縮水甘油醚、三羥甲基 丙烷多縮水甘油醚、二甘油多縮水甘油醚、聚甘油多縮水 甘油醚、山梨醇多縮水甘油醚、ν,ν,ν’，ν’-四縮水甘油基 間茬二胺、ν,ν,ν',ν1-五縮水甘油基二乙烯三胺、 Ν,Ν,Ν1,Ν'-四縮水甘油基乙二胺等。較具體而言，可列舉 以下以商品名所表示的「Denacol EX-313」、「ΕΧ-412」 、「EX-521」、「EX-614B」（以上爲 Nagase Chemtex 公司製）等。 就異氰酸酯系交聯劑之具體例而言，有甲苯二異氰酸 酯（TDI)、二苯甲烷二異氰酸酯（MDI)、六亞甲基二 異氰酸酯（HDI)等二異氰酸酯化合物、前述二異氰酸酯 化合物之2聚物以上之多聚物之聚異氰酸酯化合物、使聚 異氰酸酯化合物變性之化合物等。其中尤其以使上述聚異 氰酸酯化合物以聚乙二醇等非離子性之親水基變性之化合 物爲佳。藉由親水性之片段而變性之聚異氰酸酯化合物被 稱之爲水分散性異氰酸酯，正廣泛地在市面上被販售作爲 水性硬化劑。就異氰酸酯系交聯劑之具體例而言，可列舉 以商品名所表示的 「AQUANATE AQ100」、「 AQUANATE AQ200 j (以上爲日本 Polyurethane 工業公 司製）、「SUMIDUR 304」、「SUMIDUR 305」（以上 爲住化BayerUrethane公司製）等。 交聯劑（硬化劑（C ))之含有比例，係以相對於丙 烯酸系共聚物（A) 100質量份爲0.005〜2質量份爲佳， 201011087 0.01〜1質量份爲更佳。因爲藉由將交聯劑之含有比例定爲 上述數値範圍內，而成爲對所形成之光擴散黏著層賦予耐 熱保持力，故爲適合。交聯劑之含有比例若過大，則有由 被黏物之「浮起」變爲容易發生，同時有光擴散黏著層對 基材之緊貼成爲不良之傾向。 另外，在使用含有醛基及/或酮基之自由基聚合性單 體作爲上述C成分之情況中，含有2個以上之醯肼基之交 φ 聯劑之含有比例，係以相對於醛基及/或酮基1當量定爲 0.01〜1當量爲佳。就「含有2個以上醯肼基之交聯劑」之 具體例而言，可列舉草酸二醯胼、丙二酸二醯肼、琥珀酸 二醯肼、戊二酸二醯肼、己二酸二醯肼、癸二酸二醯肼、 苯二甲酸二醯肼、異苯二甲酸二醯肼、對苯二甲酸二醯肼 、馬來酸二醯肼、富馬酸二醯肼、伊康酸二醯肼等、合計 碳數爲2〜10(宜爲4〜6)之二羧酸二醯肼類；檸檬酸三醯 肼、硝基醋酸三醯肼、環己烷三羧酸三醯肼、乙二胺四醋 〇 酸四醯肼等3官能以上醯肼類；乙烯-1，2-二聯胺、丙烯-1，2-二聯胺、丙烯-1,3-聯胺、丁烯_1，3_二聯胺、丁烯-1,4-二聯胺、丁烯-2,3-二聯胺等合計碳數爲2~4之脂肪族二 聯胺等。 (4級銨化合物（D )) 4級銨化合物（D)，係對光擴散性黏著劑組成物中 賦予離子導電性，並抑制黏著層之表面固有電阻値以及光 擴散性黏著薄片剝離時之帶電壓。另外亦對於作爲交聯劑 -33- 201011087 之硬化劑（C)可作爲交聯觸媒而作用，而且在由黏著性 樹脂組成物形成黏著層之情況中，可良好地進行交聯反應 。再者，由於可減低黏著性樹脂組成物中之極性基，因此 黏著力之逐時變化少，可表現出安定之黏著特性。 藉由交聯反應良好地進行，黏著性樹脂組成物中之交 聯密度提升，可減低被黏物之表面之污染（黏膠殘留）。 另外，使交聯反應進行所需要的熟化時間縮短，並可使生 產性提升。再者，關於在製成光擴散性黏著薄片之黏著層 ^ 之情況下之熟化溫度，由於在較低溫度，例如40 °c以下 之溫度交聯反應會有效率地進行，因此可有效地防止光擴 散性黏著薄片之基材之熱伸縮造成之皺紋或歪曲。 就4級銨化合物（D)之具體例而言，有氫氧化四甲 基銨（TMAH )、氫氧化四乙基銨、氫氧化四丙基銨、氫 氧化四丁基銨等氫氧化烷基銨或其鹽類；氫氧化四苯基銨 等氫氧化芳香基銨或其鹽類；以三月桂基甲基銨離子、二 癸基二甲基銨離子、二椰油醯基二甲基銨離子、二硬脂醯 n 二甲基銨離子、二油烯基二甲基銨離子、鯨蠟基三甲基銨 離子、硬脂醯三甲基銨離子、山嵛基三甲基銨離子、椰油 醯基雙（2-羥乙基）甲基銨離子、聚氧乙烯（15)椰子硬 脂醯甲基銨離子、油烯基雙（2-羥乙基）甲基銨離子、椰 子苄基二甲基銨離子、月桂基雙（2-羥乙基）甲基銨離子 、癸基雙（2-羥乙基）甲基銨離子作爲陽離子之鹼或其鹽 類等。 就4級銨化合物（D)而言，可使用市售品。具體地 -34- 201011087 可列舉以商品名所表示的「TAMAPURE-AA TMAH」（多 摩化學工業公司製）、「ADEKACOL CC-36」、「 ADEKACOL CC-1 5」、「ADEKACOL CC-42」（以上爲旭 電化工業公司製）、「ETHOQUAD C/12」、「 ETHOQUAD C/25」 、 「ETHOQUAD 0/12」 、 「 ETHOQUAD 0/12E」（以上爲 LION 公司製）、「 QUARTAMIN 24P」、「QUARTAMIN 86P CONC」（以上 φ 爲花王公司製）等。 就4級銨化合物（D)而言，爲4級銨鹸或4級銨鹽 皆可，而宜爲4級銨鹸，更佳爲混合4級銨鹼4級銨鹽之 兩種以上而構成者。 4級銨化合物（D)之含量係相對於丙烯酸系共聚物 (A) 100質量份宜爲0.1〜20質量份，更佳爲〇.1〜15質量 份’特佳爲〇.5~10質量份。4級鏡化合物（D)之含量若 未滿0 _ 1質量份，則有無法充分地得到防帶電性之效果的 〇 情形。另一方面’若超過20質量份，則於黏著層之表面 有溢流出之現象’會成爲污染被黏物的原因。 (磺化聚合物（E )) 對於本發明之光擴散性黏著劑組成物而言，係以進— 步含有磺化聚合物（E)者爲佳。就磺化聚合物（e)之 具體例而言，可列舉共軛二烯系聚合物之磺化物、共轭二 烯系聚合物之氫化物之磺化物等磺化共軛二烯系聚合物（ E_l);聚苯乙烯等芳香族乙烯基系聚合物之磺化物；苯 -35- 201011087 乙烯磺酸等含有磺酸基之單體之單獨聚合物、共聚物等擴 化芳香族乙烯基系聚合物等。其中尤其以磺化共軛二嫌系 聚合物（E-1 )及聚苯乙烯磺酸（E-2 )之至少任一者爲佳 ，磺化共軛二烯系聚合物（E-1)爲更佳。 (磺化共軛二烯系聚合物（E-1)) 磺化共軛二烯系聚合物（E-1)可藉著使含共軛二嫌 系單體作爲構成單位之聚合物或其氫化物（以下將此聚合 物及氫化物統稱爲「共軛二烯系主體聚合物」）磺化，其 後以水或鹼性化合物處理而調製。另外，亦可使用市售品 作爲磺化共軛二烯系聚合物（E-1)。 (1)共軛二烯系主體聚合物 (i)構成成分 構成共軛二烯系主體聚合物之共軛二烯系單體，係以 碳數4〜10之共軛二烯系化合物爲佳，碳數4〜8之共轭二 烯系化合物爲更佳，碳數4〜6之共軛二烯系化合物爲特佳 〇 就共軛二烯系單體之具體例而言，可列舉12 —丁二烯 、1，3-丁 二烯、1,2-戊二烯、1，3-戊二烯、2,3-戊二烯、異 戊二烯、1，2-己二烯、1，3-己二烯、l，4-己二烯、i，5-己二 烯、2,3-己二烯、2,4-己二烯、2,3-二甲基-1，3-丁 二烯、 2 -乙基-1,3 -丁 二嫌、1，2 -庚二稀、1，3 -庚二嫌、1，4 -庚二 烯、1，5-庚二烯、1，6-庚二烯、2,3-庚二烯' 2,5-庚二烯、 201011087 3,4-庚一烯、3,5-庚二烯、環戊二烯、二環戊二烯、亞乙 基降莰烯等。其中尤其以i，3_ 丁二烯、異戊二烯爲佳。另 外’共轭一嫌系單體係單獨一種使用或混合兩種以上使用 皆可。 共轭二嫌系主體聚合物亦可含有來自共軛二烯系單體 以外之其他聚合性單體（以下稱爲「其他聚合性單體」） 之構成單位。 0 就其他聚合性單體之具體例而言，可列舉苯乙烯、 α -甲基苯乙烯、鄰甲基苯乙烯、間甲基苯乙烯、對甲基 苯乙烯、1-乙烯基萘等芳香族乙烯基系化合物；（甲基） 丙烯酸甲酯、（甲基）丙烯酸乙酯、（甲基）丙烯酸正丙 酯、（甲基）丙烯酸異丙酯、（甲基）丙烯酸正丁酯、（ 甲基）丙烯酸第三丁酯等（甲基）丙烯酸烷基酯類；（甲 基）丙烯酸、巴豆酸、馬來酸、富馬酸、伊康酸等不飽和 羧酸或其鹽類；馬來酸酐、伊康酸酐等不飽和聚羧酸酐類 φ ;(甲基）丙烯腈、α-氯丙烯腈、氰化亞乙烯等含有氰 基之單體或氯化乙烯基、偏二氯乙烯、乙烯基甲基酮、乙 烯基乙基酮、醋酸乙烯酯、（甲基）丙烯醯胺、（甲基） 丙烯酸縮水甘油酯等。其中尤其以芳香族乙烯基系化合物 爲佳，苯乙烯爲特佳。另外，該等其他聚合性單體係以單 獨一種使用或將兩種以上混合使用皆可。 共軛二烯系主體聚合物所含之共軛二烯系單體之比例 ，係相對於全單體宜爲0.5-99質量％，更佳爲1〜95質量 %，特佳爲5〜90質量％。共軛二烯系單體之比例若未滿 -37- 201011087 0.5質量％，則有共軛二烯系主體聚合物中之磺酸（鹽） 基含量變低，防帶電能力變得不充分的情形。另一方面， 若超過99質量％ ’則有在（磺化聚合物（E ))之存在下 使共軛二烯系單體聚合時，聚合安定性降低的情形。 在共軛二烯系主體聚合物爲共聚物之情況，爲隨機共 聚物或塊狀共聚物皆可。若爲塊狀共聚物’則AB型、 ΑΒΑ型等沒有特別限制而皆可使用。就共軛二烯系主體 聚合物之適合例而言’有聚丁二烯、聚異戊二烯、I，3· 丁 ▲ 二烯·苯乙烯隨機共聚物、丁二烯.苯乙烯二元塊狀 共聚物、苯乙烯· 1，3-丁二烯•苯乙烯三元塊狀共聚物、 1,3-丁二烯•苯乙烯· 1,3-丁二烯三元塊狀共聚物、異戊 二烯•苯乙烯隨機共聚物、異戊二烯•苯乙烯二元塊狀共 聚物、苯乙烯•異戊二烯•苯乙烯三元塊狀共聚物、異戊 二烯•苯乙烯·異戊二烯三元塊狀共聚物’或該等氫化物 以外，乙烯.丙烯•共軛二烯三元隨機共聚物等。其中尤 其以I，3·丁二烯•苯乙烯二元塊狀共聚物、苯乙烯-1，3- φ 丁二烯•苯乙烯三元塊狀共聚物、1，3-丁二烯•苯乙烯· 1，3-丁二烯三元塊狀共聚物、異戊二烯.苯乙烯二元塊狀 共聚物、苯乙烯·異戊二烯•苯乙烯三元塊狀共聚物、異 戊二烯•苯乙烯•異戊二烯三元塊狀共聚物或具有該等氫 化物等共軛二烯系單元;與芳香族乙烯基系單元之塊狀共聚 物及其氫化物爲更佳。 (Π )調製方法 -38- 201011087 共軛二烯系聚合物可使共軛二烯系單體，因應必要與 其他聚合性單體一起在過氧化氫、過氧化苯甲醯基、偶氮 雙異丁腈等自由基聚合起始劑、或正丁基鋰、萘基鈉、金 屬鈉等陰離子聚合起始劑之存在下，因應必要使用周知的 溶劑，通常在-100〜150°C，宜爲在0~130°C聚合而調製。 另外’共軛二烯系聚合物之氫化物，可藉著使殘存於 所調製之共軛二烯系聚合物之雙鍵部分的一部份或全部氫 φ 化而得到。氫化之方法並非受到特別限制者，而可使用以 往周知的氫化觸媒及方法。較具體而言，可列舉如特開平 5 -222 1 1 5號公報所記載般的觸媒及方法。另外，在調製 氫化之磺化共軛二烯系聚合物之情況中，先進行氫化與磺 化之任一者皆可。 (iii)物性値 共軛二烯系主體聚合物之質量平均分子量（Mw)宜 φ 爲i，000以上，更佳爲5,000以上，特佳爲5,000〜400,000 。共軛二烯系主體聚合物之質量平均分子量（Mw)若未 滿1，〇〇〇’則有磺化共軛二烯系聚合物（E-ι)由黏著層之 表面溢流出，黏著力逐時變化的情形。另一方面，若超過 400,000，貝U有生產性降低的情形。 (2)磺化共軛二烯系聚合物（Ed) 磺化共軛二烯系聚合物（E-1)，可藉著將共軛二烯 系主體聚合物依據以往周知的方法，例如日本化學會編集 -39- 201011087 「新實驗化學講座」14卷III，p.1 773-1 783所記載之方法 ’或特開平2-227403號公報所記載之方法，使用磺化劑 使共軛二烯系主體聚合物中之共軛二烯系單元之雙鍵部分 進行磺化，其後以水或鹼性化合物處理而調製。 (i )磺化 在磺化反應之中，共軛二烯系單元之雙鍵開環而成爲 單鍵，或成爲在此雙鍵殘留之狀態下氫原子受到磺化。另 外，在使用其他聚合性單體之情況中，除了共軛二烯系單 元以外，還有例如芳香族乙烯基系單元受到磺化亦可。 就磺化劑之具體例而言，可列舉硫酸酐、硫酸酐與電 子供應性化合物之錯合物以外，硫酸、氯磺酸、發煙硫酸 、亞硫酸氫鹽（例如Li鹽、Na鹽、K鹽等）等。其中尤 其以硫酸酐、硫酸酐與電子供應性化合物之錯合物爲佳。 另外，就電子供應性化合物之具體例而言，可列舉Ν,Ν-二甲基甲醯胺、二乙基醚、二正丁基醚、四氫呋喃、二噁 烷等醚類；三甲胺、三乙胺、三正丁胺、吡啶、哌嗪等胺 類；二甲基硫醚、二乙基硫醚等硫醚類；乙腈、乙基腈、 丙腈等腈化合物等。其中尤其以Ν，Ν-二甲基甲醯胺、二 噁烷爲佳。 磺化劑之使用量，係相對於共軛二烯系主體聚合物中 之共軛二烯系單元與芳香族乙烯基系單元之合計lmol， 以硫酸酐（S03 )換算，通常爲 0.005〜1.5mol，宜爲 0.01〜l.Omol。磺化劑之使用量若未滿〇.〇〇5mol，則有達 201011087 成目標的磺化率變得困難，防帶電能力變得不充分的情形 。另一方面，若超過1.5mol，則有未反應之磺化劑變多， 在以鹼中和後，例如硫酸鹽大量地產生而純度降低、精製 方面耗費手續的情形。 磺化反應通常在對磺化劑爲不活性的反應溶劑中實施 。就反應溶劑之具體例而言，有二氯甲烷、氯仿、二氯乙 烷、四氯乙烷、四氯乙烯等鹵化烴類；硝基甲烷、硝基苯 φ 等硝基化合物；正丙烷、正丁烷、正戊烷、正己烷、環己 烷等脂肪族烴類；四氫呋喃、二噁烷等醚類，或液體二氧 化硫等。另外，反應溶劑係以單獨一種使用或混合兩種以 上使用皆可。 作爲磺化反應之反應條件，反應溫度通常爲-70〜200 °C，而宜爲-30~50°C。反應溫度若未滿-70°C，則有磺化 反應變遲而生產性降低的情形。另一方面，若超過2 001 ，則有發生副反應，生成物變色或不溶化的情形。 φ (ii )以水或鹼性化合物進行之處理 藉由將所得到之磺化物以水或鹼性化合物處理，可調 製作爲磺化聚合物（E)之磺化共軛二烯系聚合物（E-1) 。在以水處理之情況，可得到具有磺酸基之聚合物，在以 鹼性化合物處理之情況，可得到具有磺酸鹼之聚合物。 作爲水或鹼性化合物處理磺化物時之反應條件，反應 溫度通常爲-30~150°C ’宜爲〇〜120°C，更佳爲50〜100°C 。另外，反應時間通常爲0.1〜24小時，宜爲0.5〜5小時 -41 - 201011087 。另外，以水或鹼性化合物處理磺化物之反應，在常壓下 、減壓下、或加壓下之任一條件下皆可實施。 就鹼性化合物之具體例而言，可列舉氫氧化鋰、氫氧 化鈉、氫氧化鉀等鹼金屬氫氧化物；甲氧基鈉、乙氧基鈉 、第三丁氧基鈉 '甲氧基鉀、第三丁氧基鉀等鹼金屬烷氧 基；碳酸鋰、碳酸鈉、碳酸鉀等鹸金屬碳酸鹽；甲基鋰、 乙基鋰、正丁基鋰、第二丁基鋰、正戊基鋰、正丙基鈉、 甲基氯化鎂、乙基溴化鎂、正丙基碘化鎂、二乙基鎂 '二 乙基鋅、三乙基鋁、三異丁基鋁等有機金羼化合物；三甲 基胺、三乙基胺、三正丙基胺、三正丁基胺、吡啶、苯胺 、二甲基乙醇胺、哌嗪等胺類；氨或鋰、鈉、鉀、鈣、鋅 等金屬之其他鹼性化合物等。該等中尤其以鹼金屬氫氧化 物、氨爲佳，氫氧化鋰、氫氧化鈉爲特佳。另外，該等鹼 性化合物係以單獨一種使用或混合兩種以上使用皆可。 另外，亦可使鹼性化合物溶解於適當之溶劑（例如對 水、鹼性化合物爲不活性的有機溶劑等）而使用。就有機 溶劑之具體例而言，可列舉磺化反應所使用之前述反應溶 劑以外，苯、甲苯、二甲苯等芳香族烴類；甲醇、乙醇、 正丙醇、異丙醇、乙二醇等醇類等。另外，有機溶劑係以 單獨一種或混合兩種以上使用皆可。 鹸性化合物之使用量係相對於磺化劑lmol通常爲 2m〇I以下，以i.3mol以下爲佳。另外，在將鹼性化合物 溶解於溶劑而使用之情況下，鹼性化合物之濃度通常爲 1〜70質量％，而以1〇〜50質量％程度爲佳。 201011087 另外，以水處理磺化物時水的使用量，係相對於磺化 物100質量份通常爲10~50,000質量份，而以100〜10,000 質量份爲佳。 (iii )物性値 磺化共軛二烯系聚合物（E-1)中之磺酸（鹽）基含 量，通常爲0.1〜6mmol/g，以〇.5~5mmol/g爲佳。磺酸（ φ 鹽）基含量若未滿O.lmmol/g，則有防帶電能力變得不充 分的情形。另一方面，若超過6mmol/g，則有損及黏著層 之透明性的情形。 磺化共軛二烯系聚合物（E-1)之磺酸（鹽）基含量 可由紅外線吸收光譜得到之磺基吸收作確認，組成比可由 元素分析等確認。另外，可由 W-NMR分析或13C-NMR 分析確認磺化共軛二烯系聚合物（E-1)之構造。 磺化共軛二烯系聚合物（E_l)之質量平均分子量（ 〇 Mw )係以 1，〇〇0以上爲佳，5,000以上爲更佳， 5,000〜400,000爲特佳。質量平均分子量（Mw)若未滿 1，000 ’則有磺化共軛二烯系聚合物（E-1)由黏著層之表 面溢流出’黏著力逐時變化的情形。另一方面，若超過 400,000，則有生產性降低的情形。另外，磺化共軛二烯 系聚合物（E-1)係單獨一種或混合兩種以上使用皆可。 (其他成分） 本發明之光擴散性黏著劑組成物可因應必要，使其含 -43- 201011087 有丙烯酸系共聚物（A)以外之聚合物（樹脂）。就可含 有之樹脂之具體例而言’可列舉聚酯樹脂、胺基樹脂、環 氧樹脂、聚胺甲酸乙酯樹脂等。另外’本發明之光擴散性 黏著劑組成物亦可因應必要’使其適當地含有黏著賦予劑 、碳酸鈣或氧化鈦等充塡劑、著色劑、紫外線吸收劑、抗 氧化劑、消泡劑、增黏劑、潤濕劑、光安定劑等各種添加 劑。 就潤濕劑而言，可使用矽氧樹脂系、氟系、脂肪醯胺 系、乙炔二醇系、聚醚系之化合物等。較具體而言，可列 舉以下以商品名所表示：作爲矽氧樹脂系潤濕劑的「 PSA336」（日信化學工業公司製）、「EnviroGem AD-01 」（Air Products Japan公司製）；作爲氟系潤濕劑的「 SURFLON S111N」、「SURFLON 131」（以上爲 AGC SEMI CHEMICAL 公司製、）、「MEGAFAC F-812」、「 F-833」（以上爲大日本Ink化學工業公司製）等氟系界 面活性劑。另外，可列舉作爲脂肪醯胺系潤濕劑的「 TORINON」（日本化成公司製）；作爲乙炔二醇系潤濕 劑的「SURFYNOL 104」等乙炔二醇或「SURFYNOL 420 」、「SURFYNOL 465」（以上爲 Air Products Japan 公 司製）等環氧乙烷附加物。進一步可列舉作爲聚醚系潤濕 劑的「SN984」、「SN980」（以上爲SANNOPCO公司製 )或「KF.351」、「KF_352」、「KF-353」、「KF-615 」（以上，信越化學工業公司製）、「TSF-4452」、「 TSF-4445」（以上爲東芝SILICONE公司製）等聚醚系矽 201011087 氧樹脂。 2.光擴散性黏著薄片： 本發明之第一光擴散性黏著薄片係具備：透明塑膠薄 膜、與配設於前述透明塑膠薄膜之至少單面，而且使上述 光擴散性黏著劑組成物硬化之光擴散黏著層、與配設於前 述光擴散黏著層之表面之分隔件。另外，本發明之第二光 _ 擴散性黏著薄片係具備：2片分隔件、與被挾持而配設於 前述2片分隔件之間，而且使上述光擴散性黏著劑組成物 硬化之光擴散黏著層。 以往之光擴散性薄片，係，於聚對苯二甲酸乙二酯（ PET)薄膜等基材之一面上，將分散有光擴散粒子之黏結 劑樹脂加以塗佈等而製作，而並不具有黏著性。由於前述 光擴散性薄片係與背光及液晶顯示部之各種光學薄片重叠 在一起而設置，所以會因在各薄片間發生之空氣層之光線 _ 亂反射而造成光線損失發生。爲了回避此光線損失，因此 實施了於光擴散性薄片之另一面上製作具有黏著劑等所構 成之黏著層之光擴散性薄片，將此光擴散性薄片貼附於光 源之前面、透鏡薄片、液晶顯示部等之步驟。相對於此， 本發明之光擴散性黏著薄片係由於光擴散黏著層本身具有 黏著性還有良好的光擴散性，因此不需要以往所一直使用 的黏結劑樹脂，或塗佈黏結劑樹脂之步驟及設備’可使製 造步驟簡略化及生產成本減低。另外，藉著使用本發明之 光擴散性黏著薄片，可削減液晶顯示裝置之構件個數’亦 -45- 201011087 會有助於液晶顯示裝置之薄型化。 本發明之光擴散性黏著薄片之霧度係因應用途、目的 而作調整，以20~98%程度爲適合。霧度若未滿20% ’則 由於光擴散性低，顯示器上的亮度不均勻之抑制變得困難 。另一方面，霧度若爲98 %以上，則由於透過率降低因此 爲不佳。另外，上述光擴散性黏著薄片之霧度，係由在將 全部的分隔件剝離之狀態下之測定値求得。 本發明之光擴散性黏著薄片之全光線透過率係以85% _ 以上爲佳，90%以上爲更佳，92%以上爲特佳。全光線透 過率若未滿85%，則有顯示器之亮度降低之傾向。另外， 關於全光線透過率之上限値並未特別受到限定，而實質上 係以98%以下爲佳。另外，上述光擴散性黏著薄片之全光 線透過率，係由在將全部的分隔件剝掉之狀態之測定値所 求得。 本發明之光擴散性黏著薄片之厚度係因應用途、目的 而作調整。本發明之第一光擴散性黏著薄片之厚度通常爲 @ 25~1 000μηι，而以55~800μιη爲佳。另外，本發明之第二 光擴散性黏著薄片之厚度通常爲 25〜300μιη，而以 55〜300μηι爲佳。 構成本發明之第一光擴散性黏著薄片之透明塑膠薄膜 ，係作爲第一光擴散性黏著薄片之基材而發揮機能。就透 明塑膠薄膜之具體例而言，可列舉PET薄膜、聚氯乙烯 薄膜、聚乙烯薄膜、聚胺甲酸乙酯薄膜、耐綸薄膜、處理 聚烯烴薄膜、未處理聚烯烴薄膜、三醋酸酯薄膜、聚碳酸 -46- 201011087 酯薄膜、聚甲基丙烯酸甲酯薄膜、環烯烴薄膜等。該等透 明塑膠薄膜可因應目的、用途適當地選擇’而PET薄膜 、三醋酸酯薄膜、環烯烴薄膜等爲透明性這點看來爲適宜 。另外，該等基材係單獨使用或使用層合複數個而成之多 層狀態者皆可。進一步，亦可使用於表面施加微細加工者 或以UV硬化樹脂等進行硬式塗佈處理者，及藉由離型劑 進行剝離處理者等。另外，爲了減低由光源之光線損失或 義 控制擴散特性，亦可適合使用表面塗佈低折射率或高折射 率材料之基材。 就透明塑膠薄膜之厚度而言，通常爲10〜8 ΟΟμιη，而 以25~600μιη爲佳。透明塑膠薄膜之厚度若爲1〇〜800μιη ，則有薄膜操作容易、捲取性爲良好這樣的優點。 構成本發明之光擴散性黏著薄片之分隔件，係至少一 面爲經過剝離處理的紙或塑膠薄膜等，就基材而言，係以 PET薄膜爲佳。 ❹ 就分隔件之厚度而目，通常爲15〜ΙΟΟμιη，而以 25〜ΙΟΟμιη爲佳。分隔件之厚度若爲15〜ΙΟΟμηι，則有薄膜 操作容易、捲取性爲良好這樣的優點。 分隔件之剝離處理可使用例如剝離處理劑而實施。就 剝離處理劑而言’可使用以矽爲首所代表之以往周知的成 分。 3.光擴散性黏著薄片之製造方法： 本發明之第一光擴散性黏著薄片之製造方法，係包含 -47- 201011087 :於透明塑膠薄膜之至少單面配設使上述光擴散性黏著劑 組成物硬化之光擴散黏著層，同時於前述光擴散黏著層之 表面配設分隔件之步驟的製造方法。進一步係以將上述光 擴散性黏著劑組成物塗佈於透明塑膠薄膜之至少單面，使 塗佈之前述光擴散性黏著劑組成物硬化，於前述透明塑膠 薄膜之至少單面配設前述光擴散黏著層者爲佳。另外’本 發明之第二光擴散性黏著薄片之製造方法，係包含在具有 剝離層之2片分隔件之間，將使上述光擴散性黏著劑組成 _ 物硬化之光擴散黏著層，以接觸於前述2片分隔件各自之 前述剝離層之方式挾持而配設之步驟的製造方法。 對於製造本發明之光擴散性黏著薄片而言，係以於透 明塑膠薄膜或分隔件之剝離層上，以乾燥·硬化之後之光 擴散黏著層之厚度成爲5~100μιη之方式，塗佈上述光擴 散性黏著劑組成物者爲佳。所形成之光擴散黏著層之厚度 若未滿5μιη，則有黏著性變得貧乏的傾向。另一方面，若 超過ΙΟΟμηι，則有光擴散性黏著薄片之製造及操作變得困 @ 難之傾向。 爲了將光擴散性黏著劑組成物塗佈於透明塑膠薄膜或 分隔件之剝離層上，可使用各種塗佈裝置。就塗佈裝置之 具體例而言，可列舉逗號形刮刀塗佈機、反向塗佈機、狹 縫模具塗佈機、唇口塗佈機、凹版腔體式塗佈機、簾式塗 佈機等。 使塗佈於透明塑膠薄膜或分隔件之剝離層上之光擴散 性黏著劑組成物乾燥及硬化時，係以在8 0〜1 2 0 °C之環境 -48- 201011087 氣氛下使其乾燥及硬化爲佳。未滿80 °C則乾燥或硬化困 難’因此有光擴散黏著層之形成需要長時間之傾向。另一 方面，若超過120°C，則有透明塑膠薄膜或分隔件熱劣化 之傾向。另外，在上述條件下硬化不充分之情況下，藉由 使乾燥後之光擴散性黏著薄片進一步熟成，可使交聯反應 進行。具體而言，係以在23 °C熟成7天，或在40°C熟成 3天爲佳。 @ 藉著在由上述方法所形成之透明塑膠薄膜上之光擴散 黏著層之表面，進一步貼附分隔件，可得到第一光擴散性 黏著薄片。另外’藉由在由上述方法所形成之分隔件之剝 離層上之光擴散黏著層之表面貼附剝離力相異之其他的分 隔件，挾持光擴散黏著層，可得到可使各種光學構件黏在 一起的第二光擴散性黏著薄片。 第一及第二光擴散性黏著薄片之光擴散黏著層表面之 分隔件，係以至使各層合體之光擴散黏著層與透鏡薄片等 φ 構件黏在一起時爲止，以成爲貼附之狀態保護著光擴散黏 著層者爲佳。 4.光學構件： 藉由使將本發明之第一光擴散性黏著薄片之分隔件剝 離而露出之光擴散黏著層與透鏡薄片、反射型或吸收型偏 光子、透明玻璃板、或透明樹脂板貼合，可得到本發明之 光學構件。另外，藉由使將本發明之第二光擴散性黏著薄 片一側之分隔件剝離而露出之光擴散黏著層貼合於透鏡薄 -49- 201011087 片、反射型或吸收型偏光子、透明玻璃板、或透明樹脂板 ，亦可得到本發明之光學構件。 就構成本發明之光學構件之透鏡薄片之具體例而言， 可列舉往1軸方向形成之凸透鏡並列地排列之雙凸（ lenticular)透鏡或稜鏡薄片；微米尺寸之半球形透鏡稠 密而多數排列之微透鏡陣列或蠅眼透鏡；金字塔型或逆金 字塔型之稜鏡連續而多數排列之微稜鏡等。 該等之中，尤其是爲了控制視野角或光之擴散角，以 蠅眼透鏡、金字塔型或逆金字塔型之稜鏡連續而多數排列 之微稜鏡等爲特別適合使用。在使用蠅眼透鏡薄片之情況 下，圓弧部之曲率半徑通常爲1〜50μιη，而以5〜40μιη爲 佳，節距寬通常爲2〜ΙΟΟμηι，而以10~8 0μιη爲佳。另外 ，使用微透鏡薄膜之情況，金字塔型或逆金字塔型之單位 透鏡底面一邊之長度通常爲1~1〇〇μιη，而以10〜80μιη爲 佳，頂角通常爲60〜120度，而以70~110度爲佳。 就構成本發明之光學構件之偏光子而言，可使用僅透 過特定之偏光而吸收其他偏光之通常之吸收型偏光子，加 上還有僅透過特定之偏光而反射其他偏光之反射型偏光子 。就反射型偏光子而言，可列舉例如3Μ公司製之商品名 「DBEF」等。 構成本發明之光學構件之透明玻璃板可適合作爲於液 晶顯示裝置中之液晶槽之玻璃基板或有機EL照明中之玻 璃基板而使用。另外，構成本發明之光學構件之透明樹脂 板可適合作爲液晶顯示裝置中之導光板或LED照明中之 201011087 樹脂製外蓋之構件而使用。 就本發明之光學構件之應用例而言，可列舉使指向性 之LED光擴散配光，而且於透明樹脂板貼合第一光擴散 性黏著薄片之LED照明用之樹脂製外蓋，或使用本發明 之第二光擴散性黏著薄片，使前述透鏡薄片等構件複數組 合之層合光學薄片等。另外，藉著使第一光擴散性黏著薄 片貼合於有機EL照明所使用之玻璃或PEN薄膜等高折射 φ 率基板，可得到由有機EL面板發出的光線之取出效率提 升，同時適用於室內照明等之均勻的擴散光。 [實施例] 以下，依據實施例對本發明作具體地說明，而本發明 並非受到該等實施例限定。另外，合成例、實施例、比較 例中之「份」及「％」只要沒有特別註明則爲質量基準。 另外，將各種物性値之測定方法、及諸特性之評估方法表 φ 示於以下。 [聚合物粒子（A-1 )之數量平均粒徑]:使用商品名 「Nanosizer」 （Beckman Coulter 公司製）進行測定。 [質量平均分子量（Mw)]:使用凝膠滲透層析裝置 (型號「HCL-8020」（東曹公司製））進行測定，並以 聚苯乙烯換算算出。 [膠體分率]:使試樣（W! mg)在室溫浸漬於四氫呋 喃中1週之後，取出不溶物，使此不溶物於1〇〇 °C乾燥3 小時，對其質量（W2mg)進行測定。由與W2之値， -51 - 201011087 依照下述式（2)算出丙烯酸系共聚物（A)之膠體分率 膠體分率（％) ^Wz/WjXlOO. · · · (2) [殘留單體合計濃度]:由使用氣相層析裝置（型號「 HP6890GC」（Agilent公司製））所得到之測定値計算。 詳細而言，藉由每個構成前述丙烯酸系共聚物（A)之單 @ 體之成分所得到之氣相層析圖譜，使用以既知濃度之單體 所製作之檢量線，求得各成分之定量値，由所得到之各成 分之定量値之合計得到殘留單體合計濃度。 [玻璃轉移溫度]:使用示差掃描熱量計（型號「S SC-5000 型」 （ SEIKO 電 子工業公司製 ）） 進行 測定。 [聚合物粒子（B-1)之數量平均粒徑、及粒徑分布之 變動係數（CV値）]:使用雷射粒徑解析系統（商品名^ LS13320」（Beckman Coulter 公司製））進行測定。 _ [折射率（|ηΑ·ηΒ| )]:使用多波長阿貝折射率計（商 品名「DR-2」（ATAGO公司製））進行測定。|ηΑ-ηΒ丨係 表示丙烯酸系共聚物（Α)之折射率ηΑ與有機系微粒子（ Β)之折射率ηΒ之差之絕對値。 [全光線透過率]:將測試用光擴散性黏著薄片之分隔 件剝掉，使用紫外可見近紅外分光光度計（商品名「V-5 70」（日本分光公司製））進行測定。 [霧度]:將測試用光擴散性黏著薄片之分隔件剝掉’ -52- 201011087 使用紫外可見近紅外分光光度計（商品名「V-570」（日 本分光公司製））進行測定。 [黏著力]:將測試用光擴散性黏著薄片切成1英吋寬 ，將分隔件剝掉，在23°C、50%RH之環境氣氛下貼附於 厚度0.4mm之SUS板，依據JIS Z-023 7以輥壓著。壓著 24小時後，在上述環境氣氛下，使用剝離測試機測定剝 離強度（180度剝離強度、拉伸速度：300mm/分鐘、單位 參：N/inch )。 [氣體膨脹]:將測試用光擴散性黏著薄片之分隔件剝 掉，在23°C、50%RH之環境氣氛下貼附於市售之聚酯系 薄膜薄片，依據JIS Z-0237以輥壓著。在60°C、95%RH 之環境氣氛之恆溫恆濕器中放置1個月之後，以目視觀察 薄片之外観，依據以下所表示之基準評估「氣體膨脹」。 〇（合格）：完全沒有觀察到氣體膨脹現象 △(不合格）：觀察到稍微有氣體膨脹現象 φ x(不合格）：觀察到氣體膨脹現象 [臭氣]:將測試用光擴散性黏著薄片以150°C之電氣 式熱風乾燥機乾燥1分鐘之後，將分隔件剝掉，以5階段 評估臭氣之程度。臭氣愈少定爲愈高得分，數値係以臭氣 判定者10人之判定結果之平均値表示。 [表面固有電阻値]:將測試用光擴散性黏著薄片於23 °C、55 %RH之環境氣氛下放置24小時之後，將分隔件剝 掉，使用表面固有電阻測定機（商品名「HIGH RESISTANCE METER」 （Hewlett-Packard 公司製））測 -53- 201011087 定黏著層之表面固有電阻値（Ω /D )。 [光擴散性]:將測試用光擴散性黏著薄片之分隔件剝 掉，固定於由LED光源（晶片型白色型；2,OOOmcd)離 開30mm之位置，以目視觀察光之擴散性，依據以下之基 準進行評估。 〇（合格）：LED光源完全無法辨識爲點光源 △(不合格）：LED光源幾乎無法辨識爲點光源 X (不合格）：LED光源可辨識爲點光源 [視野角（半値角的幅度）] 將測試用光擴散性黏著薄片固定於由LED光源（晶 片型白色型；2,000mcd)離開40mm之位置，對透過測試 用光擴散性黏著薄片之光線，使用ELDIM公司製之商品 名「EZ Contrast XL88」，在照度1 lx以下之暗室進行測 定。由所得到之結果，對LED光源測量左右方向及上下 方向之半値角的幅度。 [防眩性] 將測試用光擴散性黏著薄片及led光源與上述視野 角之測定方法相同地配置，以目視觀察LED透過光之散 射（眩光）的程度，依據以下之基準進行評估。 〇（合格）：沒有眩光 △(不合格）：有眩光 x(不合格）：眩光程度大 -54- 201011087 (合成例1 ) 將丙烯酸2-乙基己酯81 ·4份、甲基丙烯酸甲酯10份 ，甲基丙烯酸2-羥乙酯5份、甲基丙烯酸3.3份、及琥珀 酸2-甲基丙烯醯氧基乙基酯0.3份混合，調製單體混合物 。於具備攪拌機、溫度調節器及回流式冷卻器之高壓滅菌 釜內，加入水47份、十二烷基苯磺酸鈉0.02份作爲乳化 劑、及過硫酸鉀0.4份作爲聚合起始劑，昇溫至40°C。於 φ 此高壓滅菌釜內添加上述單體混合物100份、月桂基硫醇 〇.〇5份作爲分子量調節劑，及水29份之後，攪拌而乳化 ，藉此調製預製乳膠。將調製之預製乳膠之全量花費4小 時連續地供給至高壓滅菌釜內，同時將水9.85份、亞硫 酸氫鈉0.1份、及硫酸亞鐵〇.〇3份所構成之聚合起始劑 溶液花費5小時連續地供給。最初4小時係於40°C攪拌 進行聚合反應，其後，昇溫至50 °C攪拌3小時進行聚合 反應，進行合計7小時之聚合反應，使其完成之後，添加 φ 4級銨化合物（D )(商品名「TMAH」（多摩化學工業公 司製）：固體成分換算、固體成分濃度25% ) 2份並攪拌 ，以200網目金屬網過濾，得到水系乳膠。所得到之水系 乳膠中之聚合物粒子（A-1)之數量平均粒徑爲180nm。 另外，構成聚合物粒子（A-1)之共聚物之質量平均分子 量（Mw)爲80萬，膠體分率爲〇%，殘留單體合計濃度 爲150ppm、及玻璃轉移溫度爲-55t：。將該等測定結果表 示於下述表1。 -55 - 201011087 (合成例2〜4) 除了定爲表示於下述表1配方以外，係以與上述合成 例1之情況相同之方式得到水系乳膠。將所得到之水系乳 膠中之聚合物粒子（A-1)之數量平均粒徑、共聚物之質 量平均分子量（Mw)、膠體分率、殘留單體合計濃度、 及玻璃轉移溫度表示於表1。The measurement was carried out by Beckman Coulter. (Organic Microparticles (B)) The organic microparticles (B) may be microparticles mainly composed of an organic material, and specific examples thereof include polymer particles (B _ 1 ) of a water-based latex. The polymer particles (B-1) are not limited by the spherical particles, and may have any shape, and may have odd-shaped particles having a shape φ such as an elliptical shape or a tumbler shape. The number average particle diameter of the polymer particles (B_1) is 0. 5~20μιη is better, 1~15μιη is better, 2~ΙΟμπι is especially good. The number average particle size of the polymer particles (Β-1) is not full. At 5 μm, there is a tendency that it becomes difficult to sufficiently scatter light. On the other hand, when the number average particle diameter of the polymer particles (Β-1) exceeds 20 μm, the total light transmittance tends to be low, and it is also difficult to produce by emulsion polymerization. Further, the "number average particle diameter" is a ruthenium measured by a light scattering method. The polymer particles (Β-1) are preferably those containing a constituent unit (bl) derived from an aromatic vinyl group -23-201011087. The ratio of the constituent units (bl) contained in the polymer particles (Β-1) is 50% in the case where the total of the total constituent units contained in the polymer particles (B-1) is 100% by mass. 1% by mass is preferred, 70 to 100% by mass is more preferred, and 80 to 100% by mass is particularly preferred. When the content ratio of the constituent unit (b 1 ) is less than 50% by mass, the difference between the refractive index of the polymer particles (Β-1) and the refractive index of the acrylic copolymer (A) becomes small, and it becomes difficult to sufficiently sufficiently The light is diffused and there is a tendency for the polymerization stability to decrease. Specific examples of the aromatic vinyl monomer which can be used for constructing the constituent unit (bl) include styrene, α-methylstyrene, vinyltoluene, p-methylstyrene, and 2-methyl. Styrene, 3-methylstyrene, 4-methylstyrene, 4-ethylstyrene, 4-tert-butylstyrene, 3,4-dimethylstyrene, 4-methoxybenzene Ethylene, 4-ethoxystyrene, 2-chlorostyrene, 3-chlorostyrene, 4-chlorostyrene, 2,4-dichlorostyrene, 2,6-dichlorostyrene, 4·chloro- 3-methylstyrene, divinylbenzene, 1-vinylnaphthalene, 2-vinylpyridine, 4-vinylpyridine, and the like. Among them, especially @styrene, divinylbenzene, and α-methylstyrene are preferred. These aromatic vinyl-based single systems may be used alone or in combination of two or more. The polymer particles (Β-1) are preferably composed of a constituent unit (b2) derived from another monomer copolymerizable with various aromatic vinyl monomers, in addition to the constituent unit (bl). Specific examples of the "other monomer" which can be used to constitute the constituent unit (b2) include methyl (meth)acrylate, ethyl (meth)acrylate, and propyl (meth)acrylate. (meth)acrylic acid (n-hexyl acrylate), (meth)acrylic acid 2--24- 201011087 ethylhexyl ester, (meth)acrylic acid cyclohexyl ester (meth)acrylic acid (cyclo)alkyl ester; (meth)acrylic acid 2 -Methoxyethyl, (meth)acrylic acid alkoxy (cyclo)alkyl esters such as p-methoxycyclohexyl (meth)acrylate; trimethylolpropane tri(meth)acrylate (Meth)acrylates; vinyl esters such as vinyl acetate, vinyl propionate, vinyl vinyl ester; N-hydroxymethyl (meth) acrylamide, N, N-dimethylol (methyl) N-methylolated unsaturated carboxylic acid decylamine such as acrylamide; acrylamide containing aminoalkyl group such as 2-φ dimethylaminoethyl acrylamide; (methyl) propylene oxime Amine, N-methoxymethyl (meth) acrylamide, hydrazine, hydrazine-ethylene bis(meth) acrylamide, maleimide, maleimide, etc. Terpene amines and quinones of saturated carboxylic acids; fluorene-monomethyl (meth) acrylamides such as hydrazine-methacrylamide, hydrazine, hydrazine-dimethyl decylamine, and hydrazine, hydrazine Alkyl acrylamides; (meth) acrylates containing aminoalkyl groups such as 2-dimethylaminoethyl (meth)acrylate; 2-(dimethylamino ethoxylate) (meth) acrylate (meth) ethyl esters and the like (amino group) acrylates containing amino alkoxyalkyl groups; vinyl halide compounds such as vinyl chloride, vinylidene chloride, and fatty acid vinyl esters; 1,3-butadiene, 2- a conjugated diene compound such as methyl-1,3-butadiene, 2-chloro-1,3-butadiene or 2,3-dimethyl-1,3-butadiene; (methyl) Acrylic acid, crotonic acid, cinnamic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, itaconic anhydride, monomethyl maleate, monoethyl maleate, monomethyl meconate, y a carboxyl group-containing unsaturated monomer such as monoethyl phthalate or mono-2-(methyl) propylene oxyethyl hexahydrophthalate and an anhydride thereof; (meth)acrylonitrile, crotononitrile, cinnamon a cyanovinyl monomer such as acid nitrile; (meth) propyl 2-cyanoethyl acrylate, (meth) propylene-25- 201011087 acid 2·cyanopropyl ester, 3-cyanopropyl (meth)acrylate, (meth)propionic acid hydroxymethyl ester, (methyl Hydroxy (cyclo)alkane such as 2-hydroxyethyl acrylate, 6-hydroxyhexyl (meth) acrylate, 4-hydroxycyclohexyl (meth) acrylate, neopentyl glycol mono (meth) acrylate Substituted hydroxy(cyclo)alkyl groups such as 3-chloro-2-hydroxypropyl (meth)acrylate, 3-amino-2-hydroxypropyl (meth)acrylate, etc. Methyl)acrylic acid vinegar; others include allyl glycidyl ether, glycidyl (meth)acrylate, methyl glycidyl methacrylate, cyclohexyl (meth)acrylate, and the like. The content ratio of the organic fine particles (Β) is 0% by mass based on 100 parts by mass of the acrylic copolymer (Α). 1 to 50 parts by mass is preferred, 〇. 5 to 40 parts by mass is more preferable, and 1 to 35 parts by mass is particularly preferable. When the content of 100 parts by mass of the organic fine particles (Β) relative to the acrylic acid-based copolymer (Α) is less than 0. When the amount is 1 part by mass, the haze tends to be low. On the other hand, when it exceeds 50 parts by mass, the total light transmittance is lowered, and the adhesive strength tends to be lowered. The absolute 値|ηΑ-ηΒ of the difference between the refractive index ηΑ of the acrylic copolymer (Α) and the refractive index Ι1Β of the organic fine particles (@ Β) is 0. 1~0. 2 is better, 0. 1-0. 17 is better. |ηΑ-ηΒ|If it is less than 0. 1, there is a tendency that sufficient light diffusion performance cannot be obtained, and uneven brightness is likely to occur on the display. On the other hand, |ηΑ-ηΒ| if it exceeds 0. 2, since the total light transmittance is small, the brightness of the display tends to decrease. The organic fine particles (Β) are composed of a central portion composed of seed particles and a constituent unit containing two or more kinds of polymerizable monomers different in refractive index, and the refractive index is continuously continuous from the surface of the seed particles. -26- 201011087 The particles in the surface layer of the ground or stage can be changed. In this case, the absolute 値|nB0-nBP| of the difference between the refractive index ΠΒ0 of the innermost shell portion of the surface portion and the refractive index nBP of the outermost portion of the surface portion is 〇. 〇1~0. 15 is better, 0. 02~0. 1 is better. |nB0-nBP|If it is not full. 〇1 becomes the same optical characteristic as a uniform particle having no change in the refractive index in the particle, and if |nBO-nBP| exceeds 0. 15, there is a reduction in the total light transmittance. Further, the absolute difference η|nA-nB0 of the refractive index nA of the acrylic copolymer (A) and the refractive index nB0 of the innermost shell portion of the surface portion of the organic micro φ particle (B) is 0. 1~0. 2 is better, 0. 1~0. 17 is better. |nA-nBO|If it is less than 0. 1, there is a tendency to not obtain sufficient light diffusion performance, 丨nA-nB0| if more than 0. 2, there is a reduction in the total light transmittance. The absolute 値|nA-nBP| of the difference between the refractive index nA of the acrylic acid copolymer (A) and the refractive index nBP of the outermost shell portion of the surface portion of the organic fine particle (B) is 0. 03 is better, 0. 02 is better below. By reducing Ιπα-χιβρΙ ', light scattering (backscattering) occurring on the surface of the particles of the acrylic copolymer (Α) and the organic fine particles (Β) φ can be suppressed, and a relatively good transmittance can be obtained. (Seed Emulsification Polymerization) The polymer particles (B-1) are obtained by allowing a monodisperse particle of a styrene polymer to absorb a polymerizable monomer in the presence of a first radical polymerization initiator. The first emulsion polymerized particles (hereinafter also referred to as "polymer particles (i)") obtained by emulsion polymerization (hereinafter also referred to as "seed polymerization") are preferred. The monodisperse particles can be obtained by a usual emulsion polymerization method using an aqueous medium -27-201011087. The number average particle size of monodisperse particles is 0.05~1. 5μιη is better, 〇. 1~1μιη is better. Specific examples of the monodisperse particles include monodisperse polystyrene particles. The mass average molecular weight (Mw) of the monodisperse particles is preferably from 500 to 20,000, more preferably from 500 to 15,000, and particularly preferably from 500 to 1, 000. Further, the mass average molecular weight (Mw) of the monodisperse particles is determined by gel permeation chromatography (GPC) in terms of polystyrene. The polymerizable monomer to be absorbed by the monodisperse particles is not particularly limited as long as it can be copolymerized with various monomers. Specific examples of the polymerizable monomer to be absorbed by the monodisperse particles include the same as those exemplified in the specific examples of the above "aromatic vinyl monomer". Seed polymerization can be carried out in accordance with a well-known method. For example, when the total amount of the monomers to be used is 100 parts by mass, usually 10 to 500 parts of water may be used, and the polymerization temperature is -10 to 100 ° C (preferably -5 to 100 ° C, preferably 〇~9 0 °C), polymerization time 0. The conditions are 1 to 30 hours (preferably 2 to 25 hours). In terms of the manner of seed polymerization, the batch Q batch method of charging the monomers in batches, the batchwise or continuous feeding of the monomers, the batchwise or continuous addition of the monomer pre-formed latex, or The manner in which these methods are combined in stages. Further, one or more kinds of a molecular weight modifier, a chelating agent, and an inorganic electrolyte which are used in usual emulsion polymerization may be used as necessary. Specific examples of the first radical polymerization initiator include persulfate such as potassium persulfate or ammonium persulfate; benzamidine peroxide, lauryl peroxide, and t-butyl peroxy- Organic peroxides such as 2-ethylhexanoate; azobisisobutyronitrile, dimethyl-2,2'-azobisisobutyrate, 2-amine--28-201011087 An azo compound such as butyronitrile; a radical emulsifier containing a radical emulsifiable compound having a peroxy group; a redox system containing a reducing agent such as sodium hydrogen sulfite or ferrous sulfate; and the like. In the case of using an emulsifier, a specific example of the emulsifier may be one or more selected from the group consisting of known anionic emulsifiers, nonionic emulsifiers, and amphoteric emulsifiers. Further, a reactive emulsifier having an unsaturated double bond in the molecule or the like can also be used. _ There is no particular limitation on the molecular weight modifier used in the seed emulsion polymerization. Specific examples of the molecular weight modifier include n-hexyl mercaptan, n-octyl mercaptan, n-dodecyl mercaptan, 30th dodecyl mercaptan, n-hexadecyl mercaptan, and positive ten. a thiol such as a tetraalkyl thiol, a thirteenth alkyl thiol or a thioglycolic acid; a xanthogen dichoxide such as dimethyl xanthogen disulfide, diethyl xanthogen disulfide or diisopropyl xanthogen disulfide; Thiols; thiuram disulfides such as tetramethylthiuram disulfide, tetraethyl thiuram disulfide, tetrabutyl thiuram disulfide; chloroform, carbon tetrachloride, four Halogenated hydrocarbons such as carbon bromide and φ bromide; hydrocarbons such as pentaphenylethane and α-methylstyrene 2; other acrolein, methacrolein, allyl alcohol, thioethanol 2-ethylhexyl acid ester, terpinolene, α-terpinene, r-terpinene, dipentene, stilbene, and the like. These molecular weight modifiers may be used alone or in combination of two or more. Among these, thiols, xanthogen disulfides, thiuram disulfides, stilbene, and α-methylstyrene 2 are preferable. The polymer particles obtained by the above seed polymerization (〇, usually spherical particles. The number average particle diameter of the polymer particles (i) is preferably -29-201011087 0_1~Ιμπι'. 2~0·7μιη is better. When the number average particle diameter of the polymer particles (i) is outside the range of the number, the polymerization stability is lowered. The polymer particles (B-1) are further made to have a polymerizable monomer in the first emulsion polymerized particles (polymer particles (i)) in the presence of a second radical polymerization initiator. The seed is polymerized, and the obtained second emulsion polymerized particles (hereinafter also referred to as "polymer particles (ii)") are preferred. That is, the polymer particles (ii) can be produced by polymerizing a polymerizable monomer seed by using the polymer particles (i) as seed polymer particles. The seed polymerization may be carried out by, for example, dispersing the polymerizable monomer or its pre-formed latex in batches, batches, or continuously in an aqueous medium in which the polymer particles (i) are dispersed. The amount of the polymer particles (i) used for the seed polymerization is preferably from 1 to 100% by mass, more preferably from 2 to 80% by mass, based on 100% by mass of the polymerizable monomer. The second radical polymerization initiator may be the same as or different from the first radical polymerization initiator used in the production of the polymer particles (i). Further, in the case where an emulsifier is used in the polymerization of the seed, the emulsifier may be the same as or different from the emulsifier used in the production of the polymer particles (i). Further, the reaction conditions such as the polymerization time are the same as those in the production of the polymer particles (i). The polymer particles (ii) obtained as described above are generally spherical particles. Further, the polymer particles (B-1) are in the presence of a third radical polymerization initiator by causing the second emulsion polymerized particles (polymer particles (ii)) to absorb a polymerizable monomer. Further, the seed is polymerized, and the third emulsion polymerized particles (hereinafter also referred to as "polymer particles") obtained in -30 to 201011087 are preferred. Namely, by repeating the seed polymerization a plurality of times (complex phase) to obtain a desired particle diameter, a polymer particle (B-1) having a small particle size distribution variation coefficient (CV 値) can be obtained. Further, it is preferable that the number of repetition stages of the seed polymerization is set to be three or more stages. Further, by appropriately selecting the polymerization conversion ratio of the polymerizable monomer which supplies each constituent unit of the above polymer particles (B-1) and the type of the polymerizable monomer which is subjected to the addition polymerization of the seed polymerization particles, a tumbler can be obtained. a strange shape particle. (Curing Agent (C)) The curing agent (C) is a component which functions as a so-called crosslinking agent by curing the acrylic copolymer (A), and a known crosslinking agent can be used as the curing agent (C). Specific examples of the crosslinking agent which can be used as the curing agent (C) include a polyfunctional isocyanate crosslinking agent, an epoxy crosslinking agent, an oxazoline crosslinking agent, and an aziridine system. A divalent compound such as a crosslinking agent, a metal chelate crosslinking agent, or a dioxane adipate. These crosslinking agents may be used alone or in combination of two or more. Further, the crosslinking agent may be either oil-soluble or water-soluble. The epoxy-based crosslinking agent is preferably a polyglycidyl compound containing two or more epoxy groups. Specific examples include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, and -31 - 201011087 1,6-hexanediol diglycidyl ether, dibromo neopentyl glycol diglycidyl ether, diglycidyl phthalate, glycerol polyglycidyl ether, trimethylolpropane polyglycidyl ether, two Glycerol polyglycidyl ether, polyglycerol polyglycidyl ether, sorbitol polyglycidyl ether, ν, ν, ν', ν'-tetraglycidyl meta-diamine, ν, ν, ν', ν1-five Glyceryl diethylene triamine, hydrazine, hydrazine, hydrazine 1, Ν'-tetraglycidylethylenediamine, and the like. Specifically, the following are listed as "Denacol EX-313", "ΕΧ-412", "EX-521", and "EX-614B" (the above is manufactured by Nagase Chemtex Co., Ltd.). Specific examples of the isocyanate crosslinking agent include diisocyanate compounds such as toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and hexamethylene diisocyanate (HDI), and dimerization of the aforementioned diisocyanate compound. A polyisocyanate compound of a polymer of the above or higher, a compound which denatures a polyisocyanate compound, or the like. Among them, a compound obtained by denaturation of the above polyisocyanate compound with a nonionic hydrophilic group such as polyethylene glycol is preferred. A polyisocyanate compound which is denatured by a hydrophilic segment is called a water-dispersible isocyanate and is widely marketed as an aqueous hardener. Specific examples of the isocyanate-based crosslinking agent include "AQUANATE AQ100", "AQUANATE AQ200 j (above, manufactured by Japan Polyurethane Industrial Co., Ltd.), "SUMIDUR 304", and "SUMIDUR 305", which are represented by the trade name (the above is Sumitomo BayerUrethane company) and so on. The content ratio of the crosslinking agent (hardener (C)) is 0% by mass based on 100 parts by mass of the acrylic copolymer (A). 005~2 parts by mass is better, 201011087 0. 01 to 1 part by mass is more preferable. It is suitable because the content of the crosslinking agent is within the above range and the heat-resistant holding force is imparted to the formed light-diffusing adhesive layer. If the content ratio of the crosslinking agent is too large, the "floating" of the adherend tends to occur, and the adhesion of the light-diffusing adhesive layer to the substrate tends to be poor. In the case where a radical polymerizable monomer containing an aldehyde group and/or a ketone group is used as the above-mentioned component C, the content ratio of the φ-linking agent containing two or more sulfhydryl groups is relative to the aldehyde group. And / or ketone 1 equivalent is set to 0. 01 to 1 equivalent is preferred. Specific examples of the "crosslinking agent containing two or more sulfhydryl groups" include dioxonium oxalate, diammonium malonate, diterpene succinate, diammonium glutarate, and adipic acid. Diterpenoids, diterpene sebacate, diterpene diphthalate, diterpene diisophthalate, diterpene terephthalate, diterpene maleate, diammonium fumarate, Yikang Dicarboxylic acid diterpenoids having a total carbon number of 2 to 10 (preferably 4 to 6); triterpene citrate, triterpene nitroacetate, triterpenoid of cyclohexanetricarboxylic acid More than three functional groups such as hydrazine, ethylenediamine tetraacetic acid tetradecanoic acid; ethylene-1,2-diamine, propylene-1,2-diamine, propylene-1,3-amine, butyl The aliphatic diamine having a total carbon number of 2 to 4, such as alkene-1,3-diamine, butene-1,4-diamine, butene-2,3-diamine. (4th-order ammonium compound (D)) The 4-stage ammonium compound (D) imparts ionic conductivity to the light-diffusing adhesive composition, and suppresses the surface specific resistance of the adhesive layer and the peeling of the light-diffusing adhesive sheet. With voltage. Further, the curing agent (C) as the crosslinking agent -33-201011087 can function as a crosslinking catalyst, and in the case where the adhesive layer is formed of the adhesive resin composition, the crosslinking reaction can be favorably performed. Further, since the polar group in the adhesive resin composition can be reduced, the adhesive force is less changed from time to time, and the adhesive property of stability can be exhibited. By carrying out the crosslinking reaction well, the crosslinking density in the adhesive resin composition is increased, and the contamination of the surface of the adherend (viscose residue) can be reduced. Further, the aging time required for the crosslinking reaction to proceed is shortened, and the productivity is improved. Further, regarding the aging temperature in the case of forming the adhesive layer of the light-diffusing adhesive sheet, since the crosslinking reaction proceeds efficiently at a relatively low temperature, for example, 40 ° C or less, it can be effectively prevented. Wrinkles or distortion caused by thermal expansion and contraction of the substrate of the light diffusing adhesive sheet. Specific examples of the fourth-order ammonium compound (D) include alkylammonium hydroxide (TMAH), tetraethylammonium hydroxide, tetrapropylammonium hydroxide, tetrabutylammonium hydroxide, and the like. Ammonium or a salt thereof; aryl ammonium hydroxide or a salt thereof such as tetraphenylammonium hydroxide; trimethyl lauryl ammonium ion, dimercaptodimethylammonium ion, dicocoyl dimethyl ammonium Ionic, distearyl quinone n-dimethylammonium ion, dioleyldimethylammonium ion, cetyltrimethylammonium ion, stearin trimethylammonium ion, behenyltrimethylammonium ion, Cocoyl bis(2-hydroxyethyl)methylammonium ion, polyoxyethylene (15) coconut stearin methylammonium ion, oleyl bis(2-hydroxyethyl)methylammonium ion, coconut benzyl A dimethylammonium ion, a lauryl bis(2-hydroxyethyl)methylammonium ion, or a decyl bis(2-hydroxyethyl)methylammonium ion as a base of a cation or a salt thereof. As the fourth-order ammonium compound (D), a commercially available product can be used. Specifically, "TAMAPURE-AA TMAH" (made by Tama Chemical Industry Co., Ltd.), "ADEKACOL CC-36", "ADEKACOL CC-1 5", and "ADEKACOL CC-42" (above) "Atheri Chemical Co., Ltd.", "ETHOQUAD C/12", "ETHOQUAD C/25", "ETHOQUAD 0/12", "ETHOQUAD 0/12E" (above, LION Corporation), "QUARTAMIN 24P", "QUARTAMIN" 86P CONC" (the above φ is made by Kao Corporation) and so on. In the case of the quaternary ammonium compound (D), it may be a quaternary ammonium hydrazine or a quaternary ammonium salt, and is preferably a quaternary ammonium cerium, more preferably a mixed quaternary ammonium quaternary ammonium quaternary ammonium salt. By. The content of the quaternary ammonium compound (D) is preferably 0. by mass relative to 100 parts by mass of the acrylic copolymer (A). 1 to 20 parts by mass, more preferably 〇. 1 to 15 parts by weight. 5 to 10 parts by mass. When the content of the fourth-stage mirror compound (D) is less than 0 _ 1 part by mass, there is a case where the effect of antistatic property cannot be sufficiently obtained. On the other hand, if it exceeds 20 parts by mass, the phenomenon of overflow and overflow on the surface of the adhesive layer may cause contamination of the adherend. (Sulfolated Polymer (E)) It is preferred that the light-diffusing adhesive composition of the present invention contains a sulfonated polymer (E) in a further step. Specific examples of the sulfonated polymer (e) include a sulfonated conjugated diene polymer such as a sulfonate of a conjugated diene polymer or a sulfonated product of a hydride of a conjugated diene polymer. (E_l); sulfonate of aromatic vinyl polymer such as polystyrene; benzene-35-201011087 Expanded aromatic vinyl group such as individual polymer or copolymer of sulfonic acid group-containing monomer such as ethylene sulfonic acid Polymers, etc. Among them, at least one of a sulfonated conjugated dimeric polymer (E-1) and a polystyrenesulfonic acid (E-2) is preferred, and a sulfonated conjugated diene polymer (E-1) is preferred. For better. (sulfonated conjugated diene polymer (E-1)) a sulfonated conjugated diene polymer (E-1) by using a conjugated suspicion monomer as a constituent unit or The hydride (hereinafter collectively referred to as "conjugated diene-based host polymer") is sulfonated, and then prepared by treatment with water or a basic compound. Further, a commercially available product can also be used as the sulfonated conjugated diene polymer (E-1). (1) The conjugated diene-based host polymer (i) is a conjugated diene monomer which constitutes a conjugated diene-based host polymer, and is preferably a conjugated diene compound having 4 to 10 carbon atoms. The conjugated diene compound having 4 to 8 carbon atoms is more preferable, and the conjugated diene compound having 4 to 6 carbon atoms is particularly preferred. Specific examples of the conjugated diene monomer include 12 - butadiene, 1,3-butadiene, 1,2-pentadiene, 1,3-pentadiene, 2,3-pentadiene, isoprene, 1,2-hexadiene, 1,3-hexadiene, 1,4-hexadiene, i,5-hexadiene, 2,3-hexadiene, 2,4-hexadiene, 2,3-dimethyl-1, 3-butadiene, 2-ethyl-1,3-butane, 1,2-heptane, 1,3-heptane, 1,4-heptadiene, 1,5-heptadiene 1,6-heptadiene, 2,3-heptadiene' 2,5-heptadiene, 201011087 3,4-heptene, 3,5-heptadiene, cyclopentadiene, dicyclopentane Diene, ethylene decene, and the like. Among them, i, 3-butadiene and isoprene are particularly preferred. In addition, the conjugated single system may be used alone or in combination of two or more. The conjugated secondary host polymer may also contain a constituent unit derived from a polymerizable monomer other than the conjugated diene monomer (hereinafter referred to as "other polymerizable monomer"). 0 Specific examples of the other polymerizable monomer include aromatics such as styrene, α-methylstyrene, o-methylstyrene, m-methylstyrene, p-methylstyrene, and 1-vinylnaphthalene. Group vinyl compound; methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, ( (meth)acrylic acid alkyl esters such as methyl butyl acrylate; unsaturated carboxylic acids such as (meth)acrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid or salts thereof; Unsaturated polycarboxylic acid anhydrides such as phthalic anhydride and itaconic anhydride; cyano group-containing monomers such as (meth)acrylonitrile, α-chloroacrylonitrile, and vinyl cyanide, or vinyl chloride or vinylidene chloride; Vinyl methyl ketone, vinyl ethyl ketone, vinyl acetate, (meth) acrylamide, glycidyl (meth) acrylate, and the like. Among them, an aromatic vinyl compound is preferred, and styrene is particularly preferred. Further, these other polymerizable single systems may be used singly or in combination of two or more. The ratio of the conjugated diene monomer contained in the conjugated diene host polymer is preferably 0. 5-99% by mass, more preferably 1 to 95% by mass, particularly preferably 5 to 90% by mass. The ratio of conjugated diene monomer is not full -37- 201011087 0. When the content is 5 mass%, the content of the sulfonic acid (salt) group in the conjugated diene host polymer becomes low, and the antistatic property is insufficient. On the other hand, when the conjugated diene monomer is polymerized in the presence of (sulfonated polymer (E)), the polymerization stability is lowered when it exceeds 99% by mass. In the case where the conjugated diene host polymer is a copolymer, it may be a random copolymer or a block copolymer. In the case of a bulk copolymer, the AB type, the hydrazine type, and the like can be used without particular limitation. As a suitable example of the conjugated diene host polymer, there are polybutadiene, polyisoprene, I,3·butyl ▲ diene styrene random copolymer, butadiene. Styrene binary block copolymer, styrene·1,3-butadiene•styrene ternary block copolymer, 1,3-butadiene•styrene·1,3-butadiene ternary block Copolymer, isoprene/styrene random copolymer, isoprene/styrene binary block copolymer, styrene • isoprene • styrene ternary block copolymer, isoprene • styrene-isoprene ternary block copolymer 'or these hydrides, ethylene. A propylene/conjugated diene ternary random copolymer. Among them, I,3·butadiene-styrene binary block copolymer, styrene-1,3-φ-butadiene-styrene ternary block copolymer, 1,3-butadiene-benzene Ethylene·1,3-butadiene ternary block copolymer, isoprene. Styrene binary block copolymer, styrene-isoprene/styrene ternary block copolymer, isoprene-styrene/isoprene ternary block copolymer or having such hydride The conjugated diene unit is more preferably a block copolymer of an aromatic vinyl unit and a hydride thereof. (Π) Preparation method-38-201011087 The conjugated diene polymer can be used as a conjugated diene monomer, if necessary together with other polymerizable monomers in hydrogen peroxide, benzammonium peroxide, azobis In the presence of a radical polymerization initiator such as isobutyronitrile or an anionic polymerization initiator such as n-butyllithium, naphthyl sodium or sodium metal, it is necessary to use a well-known solvent, usually at -100 to 150 ° C, preferably It is prepared by polymerization at 0 to 130 °C. Further, the hydride of the conjugated diene polymer can be obtained by oxidizing a part or all of the hydrogen remaining in the double bond portion of the prepared conjugated diene polymer. The method of hydrogenation is not particularly limited, and a conventional hydrogenation catalyst and method can be used. More specifically, a catalyst and a method as described in Japanese Laid-Open Patent Publication No. Hei No. 5-222119. Further, in the case of preparing a hydrogenated sulfonated conjugated diene polymer, either hydrogenation or sulfonation may be carried out first. (iii) Physical properties The mass average molecular weight (Mw) of the conjugated diene host polymer is preferably φ or more, more preferably 5,000 or more, and particularly preferably 5,000 to 400,000. If the mass average molecular weight (Mw) of the conjugated diene host polymer is less than 1, the sulfonated conjugated diene polymer (E-ι) overflows from the surface of the adhesive layer, and the adhesion is increased. Time-varying situation. On the other hand, if it exceeds 400,000, the production of the shell U is lowered. (2) Sulfonated conjugated diene polymer (Ed) The sulfonated conjugated diene polymer (E-1) can be obtained by a conventionally known method, for example, by using a conjugated diene host polymer. Chemistry Society Compilation-39- 201011087 "New Experimental Chemistry Lecture", Volume 14, III, p. In the method described in Japanese Laid-Open Patent Publication No. Hei No. 2-227403, the sulfonating agent is used to sulfonate the double bond portion of the conjugated diene unit in the conjugated diene host polymer. It is then prepared by treatment with water or a basic compound. (i) Sulfonation In the sulfonation reaction, the double bond of the conjugated diene unit is opened to form a single bond, or the hydrogen atom is sulfonated in a state where the double bond remains. Further, in the case of using another polymerizable monomer, in addition to the conjugated diene unit, for example, the aromatic vinyl unit may be sulfonated. Specific examples of the sulfonating agent include sulfuric acid anhydride, a complex of sulfuric anhydride and an electron-donating compound, sulfuric acid, chlorosulfonic acid, fuming sulfuric acid, and bisulfite (for example, Li salt, Na salt, K salt, etc.). Among them, a complex of sulfuric anhydride, sulfuric anhydride and an electron-donating compound is preferred. Further, specific examples of the electron-donating compound include ethers such as hydrazine, hydrazine-dimethylformamide, diethyl ether, di-n-butyl ether, tetrahydrofuran, and dioxane; trimethylamine and trisole; An amine such as ethylamine, tri-n-butylamine, pyridine or piperazine; a sulfide such as dimethyl sulfide or diethyl sulfide; a nitrile compound such as acetonitrile, ethyl nitrile or propionitrile. Among them, hydrazine, hydrazine-dimethylformamide and dioxane are preferred. The amount of the sulfonating agent to be used is 1 mol based on the total of the conjugated diene unit and the aromatic vinyl unit in the conjugated diene host polymer, and is usually 0 in terms of sulfuric anhydride (S03). 005~1. 5mol, preferably 0. 01~l. Omol. If the amount of sulfonating agent used is not enough. When 〇〇5mol, the sulfonation rate of the target of 201011087 becomes difficult, and the antistatic property becomes insufficient. On the other hand, if it exceeds 1. When the amount is 5 mol, the amount of the unreacted sulfonating agent increases. After the alkali is neutralized, for example, a large amount of sulfate is produced, and the purity is lowered, and the purification is expensive. The sulfonation reaction is usually carried out in a reaction solvent which is inactive to the sulfonating agent. Specific examples of the reaction solvent include halogenated hydrocarbons such as dichloromethane, chloroform, dichloroethane, tetrachloroethane, and tetrachloroethylene; nitro compounds such as nitromethane and nitrobenzene; n-propane; An aliphatic hydrocarbon such as n-butane, n-pentane, n-hexane or cyclohexane; an ether such as tetrahydrofuran or dioxane; or liquid sulfur dioxide. Further, the reaction solvent may be used singly or in combination of two or more. As the reaction condition of the sulfonation reaction, the reaction temperature is usually -70 to 200 °C, and preferably -30 to 50 °C. When the reaction temperature is less than -70 °C, the sulfonation reaction may be delayed and the productivity may be lowered. On the other hand, if it exceeds 2 001, a side reaction may occur and the product may be discolored or insolubilized. φ (ii) Treatment with water or a basic compound A sulfonated conjugated diene polymer as a sulfonated polymer (E) can be prepared by treating the obtained sulfonate with water or a basic compound ( E-1). In the case of treatment with water, a polymer having a sulfonic acid group can be obtained, and in the case of treatment with a basic compound, a polymer having a sulfonic acid base can be obtained. The reaction conditions for treating the sulfonate as water or a basic compound are usually -30 to 150 ° C, preferably 〇 to 120 ° C, more preferably 50 to 100 ° C. In addition, the reaction time is usually 0. 1 to 24 hours, preferably 0. 5 to 5 hours -41 - 201011087. Further, the reaction of treating the sulfonate with water or a basic compound can be carried out under any conditions of normal pressure, reduced pressure, or under pressure. Specific examples of the basic compound include alkali metal hydroxides such as lithium hydroxide, sodium hydroxide, and potassium hydroxide; sodium methoxide, sodium ethoxide, and sodium tributoxide methoxy. An alkali metal alkoxy group such as potassium or potassium t-butoxide; a ruthenium metal carbonate such as lithium carbonate, sodium carbonate or potassium carbonate; methyl lithium, ethyl lithium, n-butyl lithium, second butyl lithium, and n-pentyl Organic ruthenium compound such as lithium, n-propyl sodium, methyl magnesium chloride, ethyl magnesium bromide, n-propyl magnesium iodide, diethyl magnesium 'diethyl zinc, triethyl aluminum, triisobutyl aluminum ; amines such as trimethylamine, triethylamine, tri-n-propylamine, tri-n-butylamine, pyridine, aniline, dimethylethanolamine, piperazine; ammonia or lithium, sodium, potassium, calcium, zinc, etc. Other basic compounds of metals, etc. Among them, alkali metal hydroxides and ammonia are preferred, and lithium hydroxide and sodium hydroxide are particularly preferred. Further, these basic compounds may be used alone or in combination of two or more. Further, the basic compound may be dissolved in a suitable solvent (e.g., an organic solvent which is inactive to water or a basic compound). Specific examples of the organic solvent include aromatic hydrocarbons such as benzene, toluene, and xylene other than the reaction solvent used in the sulfonation reaction; methanol, ethanol, n-propanol, isopropanol, ethylene glycol, and the like. Alcohols, etc. Further, the organic solvent may be used singly or in combination of two or more. The amount of the inert compound used is usually 2 m〇I or less relative to the sulfonating agent, i. 3mol or less is preferred. Further, when the basic compound is dissolved in a solvent and used, the concentration of the basic compound is usually from 1 to 70% by mass, preferably from about 1% to about 50% by mass. Further, the amount of water used for treating the sulfonate with water is usually 10 to 50,000 parts by mass, and preferably 100 to 10,000 parts by mass, based on 100 parts by mass of the sulfonate. (iii) physical sulfonated sulfonated conjugated diene polymer (E-1) having a sulfonic acid (salt) group content, usually 0. 1~6mmol/g, to 〇. 5~5mmol/g is preferred. If the content of sulfonic acid ( φ salt) is less than O. When lmmol/g, there is a case where the antistatic property becomes insufficient. On the other hand, when it exceeds 6 mmol/g, the transparency of the adhesive layer may be impaired. The sulfonate group content of the sulfonated conjugated diene polymer (E-1) can be confirmed by the sulfo group absorption obtained by the infrared absorption spectrum, and the composition ratio can be confirmed by elemental analysis or the like. Further, the structure of the sulfonated conjugated diene polymer (E-1) can be confirmed by W-NMR analysis or 13C-NMR analysis. The mass average molecular weight (〇 Mw ) of the sulfonated conjugated diene polymer (E-1) is preferably 〇〇0 or more, more preferably 5,000 or more, and particularly preferably 5,000 to 400,000. When the mass average molecular weight (Mw) is less than 1,000 Å, the sulfonated conjugated diene polymer (E-1) changes from the surface of the adhesive layer to the adhesive force. On the other hand, if it exceeds 400,000, there is a case where productivity is lowered. Further, the sulfonated conjugated diene polymer (E-1) may be used alone or in combination of two or more. (Other components) The light-diffusing adhesive composition of the present invention may contain a polymer (resin) other than the acrylic copolymer (A), if necessary, from -43 to 201011087. Specific examples of the resin which may be contained include a polyester resin, an amine resin, an epoxy resin, and a polyurethane resin. Further, the composition of the light-diffusing adhesive of the present invention may suitably contain an adhesive agent, a calcium carbonate or titanium oxide filler, a colorant, an ultraviolet absorber, an antioxidant, an antifoaming agent, and the like. Various additives such as tackifiers, wetting agents, and light stabilizers. As the wetting agent, a silicone resin, a fluorine-based compound, a fatty amide-based compound, an acetylene glycol-based compound, a polyether-based compound, or the like can be used. Specifically, the following is a product name: "PSA336" (manufactured by Nissin Chemical Industry Co., Ltd.) and "EnviroGem AD-01" (manufactured by Air Products Japan Co., Ltd.) as a hydrogen peroxide-based wetting agent; Fluoride-containing "SURFLON S111N", "SURFLON 131" (above, manufactured by AGC SEMI CHEMICAL), "MEGAFAC F-812", "F-833" (above, manufactured by Dainippon Ink Chemical Industry Co., Ltd.) Is a surfactant. In addition, "TORINON" (manufactured by Nippon Kasei Co., Ltd.) as a fat amide-based wetting agent, acetylene diol such as "SURFYNOL 104" as an acetylene glycol-based wetting agent, or "SURFYNOL 420" or "SURFYNOL 465" (The above is manufactured by Air Products Japan Co., Ltd.) and other ethylene oxide addenda. Further, "SN984" and "SN980" (the above are manufactured by SANNOPCO Co., Ltd.) or "KF." which are polyether-based wetting agents are mentioned. Polyethers such as 351", "KF_352", "KF-353", "KF-615" (above, Shin-Etsu Chemical Co., Ltd.), "TSF-4452", "TSF-4445" (above, Toshiba SILICONE) System 201011087 Oxygen resin. 2. Light-diffusing adhesive sheet: The first light-diffusing adhesive sheet of the present invention comprises: a transparent plastic film, and light diffused on at least one side of the transparent plastic film and hardening the light-diffusing adhesive composition An adhesive layer and a separator disposed on a surface of the light diffusion adhesive layer. Further, the second light-diffusing adhesive sheet of the present invention comprises: two separators which are disposed between the two separators and which are lightly diffused by the light diffusing adhesive composition Adhesive layer. The conventional light-diffusing sheet is produced by coating a binder resin in which light-diffusing particles are dispersed on one surface of a substrate such as a polyethylene terephthalate (PET) film, but does not have Adhesive. Since the light diffusing sheet is provided so as to overlap with the various optical sheets of the backlight and the liquid crystal display portion, light loss occurs due to the ray reflection of the air layer occurring between the sheets. In order to avoid this light loss, a light-diffusing sheet having an adhesive layer made of an adhesive or the like is formed on the other surface of the light-diffusing sheet, and the light-diffusing sheet is attached to the front surface of the light source, the lens sheet, The steps of the liquid crystal display unit and the like. On the other hand, in the light-diffusing adhesive sheet of the present invention, since the light-diffusing adhesive layer itself has adhesiveness and good light diffusibility, the conventionally used adhesive resin or the step of applying the adhesive resin is not required. And equipment' can simplify manufacturing steps and reduce production costs. Further, by using the light-diffusing adhesive sheet of the present invention, the number of members of the liquid crystal display device can be reduced, and -45-201011087 contributes to the reduction in thickness of the liquid crystal display device. The haze of the light-diffusing adhesive sheet of the present invention is adjusted depending on the purpose and purpose, and is suitably 20 to 98%. If the haze is less than 20%, the suppression of unevenness in brightness on the display becomes difficult due to low light diffusibility. On the other hand, if the haze is 98% or more, the transmittance is lowered, which is not preferable. Further, the haze of the light-diffusing adhesive sheet is determined by measuring the state in which all the separators are peeled off. The light diffusing adhesive sheet of the present invention has a total light transmittance of 85% or more, more preferably 90% or more, and particularly preferably 92% or more. If the total light transmittance is less than 85%, the brightness of the display tends to decrease. Further, the upper limit of the total light transmittance is not particularly limited, but is preferably 98% or less. Further, the total light transmittance of the light-diffusing adhesive sheet is determined by measuring the state in which all the separators are peeled off. The thickness of the light-diffusing adhesive sheet of the present invention is adjusted depending on the purpose and purpose. The thickness of the first light-diffusing adhesive sheet of the present invention is usually @ 25 to 1 000 μηι, and preferably 55 to 800 μηη. Further, the thickness of the second light-diffusing adhesive sheet of the present invention is usually 25 to 300 μm, and preferably 55 to 300 μm. The transparent plastic film constituting the first light-diffusing adhesive sheet of the present invention functions as a base material of the first light-diffusing adhesive sheet. Specific examples of the transparent plastic film include a PET film, a polyvinyl chloride film, a polyethylene film, a polyurethane film, a nylon film, a treated polyolefin film, an untreated polyolefin film, and a triacetate film. , Polycarbonate-46- 201011087 Ester film, polymethyl methacrylate film, cycloolefin film, and the like. These transparent plastic films may be suitably selected depending on the purpose and use, and it is suitable that the PET film, the triacetate film, the cycloolefin film, etc. are transparent. Further, these base materials may be used singly or in a multi-layered state in which a plurality of layers are laminated. Further, it can be used for a person who applies a fine processor to a surface, a hard coater with a UV curable resin, or the like, and a peeler for a release agent. Further, in order to reduce the light loss or the controlled diffusion characteristics of the light source, it is also suitable to use a substrate coated with a material having a low refractive index or a high refractive index. In terms of the thickness of the transparent plastic film, it is usually 10 to 8 ΟΟ μιη, and preferably 25 to 600 μηη. When the thickness of the transparent plastic film is from 1 〇 to 800 μm, the film operation is easy and the take-up property is good. The separator constituting the light-diffusing adhesive sheet of the present invention is at least one surface which is subjected to a release-treated paper or a plastic film, and the substrate is preferably a PET film. ❹ For the thickness of the separator, it is usually 15~ΙΟΟμηη, and 25~ΙΟΟμηη is preferred. When the thickness of the separator is 15 to ΙΟΟμηι, there is an advantage that the film operation is easy and the take-up property is good. The peeling treatment of the separator can be carried out using, for example, a release treatment agent. As the release treatment agent, a conventionally known component represented by ruthenium can be used. 3. Method for producing light diffusing adhesive sheet: The method for producing a first light diffusing adhesive sheet according to the present invention comprises -47 to 201011087: at least one side of a transparent plastic film is disposed to harden the light diffusing adhesive composition A method of manufacturing a step of dispersing an adhesive layer and providing a spacer on the surface of the light-diffusing adhesive layer. Further, the light diffusing adhesive composition is applied to at least one side of the transparent plastic film to cure the coated light diffusing adhesive composition, and the light is disposed on at least one side of the transparent plastic film. It is better to diffuse the adhesive layer. Further, the method for producing a second light-diffusing adhesive sheet of the present invention comprises a light-diffusing adhesive layer which is formed by bonding a light-diffusing adhesive composition between two separators having a release layer to be in contact with each other. A manufacturing method of the step of arranging and disposing the respective release layers of the two separators. The light-diffusing adhesive sheet of the present invention is applied to the release layer of the transparent plastic film or the separator, and the light-diffusing adhesive layer after drying and hardening is applied in a thickness of 5 to 100 μm. A diffusing adhesive composition is preferred. If the thickness of the formed light-diffusing adhesive layer is less than 5 μm, the adhesiveness tends to be poor. On the other hand, when it exceeds ΙΟΟμηι, the manufacture and operation of the light-diffusing adhesive sheet become difficult. In order to apply the light diffusing adhesive composition to the release layer of the transparent plastic film or the separator, various coating devices can be used. Specific examples of the coating device include a comma blade coater, a reverse coater, a slit die coater, a lip coater, a gravure cavity coater, and a curtain coater. Wait. When the light diffusing adhesive composition coated on the release layer of the transparent plastic film or the separator is dried and hardened, it is dried in an atmosphere of -80 to 201011087 at 80 to 120 ° C and Hardening is better. If it is less than 80 °C, it is difficult to dry or harden. Therefore, the formation of a light-diffusing adhesive layer tends to be long. On the other hand, if it exceeds 120 °C, the transparent plastic film or the separator tends to be thermally deteriorated. Further, when the curing is insufficient under the above conditions, the crosslinking reaction can be carried out by further aging the dried light-diffusing adhesive sheet. Specifically, it is preferably aged at 23 ° C for 7 days or at 40 ° C for 3 days. @ The first light-diffusing adhesive sheet can be obtained by further attaching a separator to the surface of the light-diffusing adhesive layer on the transparent plastic film formed by the above method. In addition, by attaching other spacers having different peeling forces to the surface of the light-diffusing adhesive layer on the peeling layer of the separator formed by the above method, the light-diffusing adhesive layer can be held, and various optical members can be obtained. A second light diffusing adhesive sheet together. The separators on the surface of the light-diffusing adhesive layer of the first and second light-diffusing adhesive sheets are protected so as to adhere to each other when the light-diffusing adhesive layer of each laminate is adhered to a φ member such as a lens sheet. Light diffusion adhesive layer is preferred. 4. Optical member: The light-diffusing adhesive layer exposed by peeling off the separator of the first light-diffusing adhesive sheet of the present invention is bonded to a lens sheet, a reflective or absorbing polarizer, a transparent glass plate, or a transparent resin plate The optical member of the present invention can be obtained. Further, the light-diffusing adhesive layer exposed by peeling off the separator on the side of the second light-diffusing adhesive sheet of the present invention is bonded to the lens thin-49-201011087 sheet, reflective or absorbing polarizer, transparent glass The optical member of the present invention can also be obtained from a plate or a transparent resin plate. Specific examples of the lens sheet constituting the optical member of the present invention include a lenticular lens or a bismuth sheet in which convex lenses formed in one axial direction are arranged side by side; micron-sized hemispherical lenses are dense and mostly arranged. A microlens array or a fly's eye lens; a pyramidal or inverse pyramid type with continuous and mostly arranged microstrips. Among them, in particular, in order to control the viewing angle or the light diffusion angle, it is particularly suitable to use a fly eye lens, a pyramid type or a reverse pyramid type which are continuously and mostly arranged. In the case of using a fly-eye lens sheet, the radius of curvature of the circular arc portion is usually 1 to 50 μm, and preferably 5 to 40 μm, and the pitch width is usually 2 to ΙΟΟμηι, and preferably 10 to 80 μm. Further, in the case of using a microlens film, the length of one side of the bottom surface of the unit lens of the pyramid type or the inverse pyramid type is usually 1 to 1 μm, and preferably 10 to 80 μm, and the apex angle is usually 60 to 120 degrees. 70~110 degrees is better. As the polarizer constituting the optical member of the present invention, a normal absorbing type photon which absorbs other polarized light by transmitting only a specific polarized light can be used, and a reflective type photon which reflects other polarized light only by a specific polarized light can be used. . The reflective polarizer may, for example, be a product name "DBEF" manufactured by San Francisco Co., Ltd., or the like. The transparent glass plate constituting the optical member of the present invention can be suitably used as a glass substrate in a liquid crystal cell in a liquid crystal display device or a glass substrate in organic EL illumination. Further, the transparent resin sheet constituting the optical member of the present invention can be suitably used as a member of a 201011087 resin cover for a light guide plate or LED illumination in a liquid crystal display device. In the application example of the optical member of the present invention, a resin-made outer cover for LED lighting in which the directivity LED light is diffused and light-distributed, and the first light-diffusing adhesive sheet is bonded to the transparent resin sheet, or In the second light-diffusing adhesive sheet of the present invention, a laminated optical sheet or the like in which a plurality of members such as the lens sheet are combined is used. In addition, by bonding the first light-diffusing adhesive sheet to a high-refractive φ-rate substrate such as glass or PEN film used for organic EL illumination, it is possible to obtain an efficiency of extraction of light emitted from the organic EL panel, and it is suitable for indoor use. Uniform diffused light such as illumination. [Examples] Hereinafter, the present invention will be specifically described based on examples, but the present invention is not limited by the examples. In addition, "parts" and "%" in the synthesis examples, examples, and comparative examples are quality standards unless otherwise specified. In addition, the measurement method of various physical properties and the evaluation method of various characteristics are shown below. [Quantum average particle diameter of polymer particles (A-1)]: Measurement was carried out using a product name "Nanosizer" (manufactured by Beckman Coulter Co., Ltd.). [Mass average molecular weight (Mw)]: It was measured by a gel permeation chromatography apparatus (model "HCL-8020" (manufactured by Tosoh Corporation)) and calculated in terms of polystyrene. [Colloid fraction]: After immersing the sample (W! mg) in tetrahydrofuran at room temperature for 1 week, the insoluble matter was taken out, and the insoluble matter was dried at 1 ° C for 3 hours, and the mass (W 2 mg) was subjected to Determination. From the point of W2, -51 - 201011087, the colloid fraction of the acrylic copolymer (A) was calculated according to the following formula (2). Colloid fraction (%) ^Wz/WjXlOO. (2) [Total residual monomer concentration]: Calculated by measurement using a gas chromatography apparatus (model "HP6890GC" (manufactured by Agilent)). Specifically, each component is obtained by using a gas chromatographic spectrum obtained by constituting a single component of the acrylic copolymer (A) using a calibration curve prepared from a monomer having a known concentration. The quantitative enthalpy is obtained by summing the total amount of residual monomers from the total amount of enthalpy of each component obtained. [Glass transfer temperature]: Measurement was carried out using a differential scanning calorimeter (model "S SC-5000" (manufactured by SEIKO Electronics Co., Ltd.)). [The number average particle diameter of the polymer particles (B-1) and the coefficient of variation (CV値) of the particle size distribution]: Measurement using a laser particle size analysis system (trade name: LS13320 (manufactured by Beckman Coulter)) . _ [Refractive index (|ηΑ·ηΒ|)]: Measurement was carried out using a multi-wavelength Abbe refractometer (trade name "DR-2" (manufactured by ATAGO Co., Ltd.)). |ηΑ-ηΒ丨 indicates the absolute 値 of the difference between the refractive index ηΑ of the acrylic copolymer (Α) and the refractive index ηΒ of the organic fine particles (Β). [Total Light Transmittance]: The separator of the test light-diffusing adhesive sheet was peeled off, and the measurement was carried out using an ultraviolet-visible near-infrared spectrophotometer (trade name "V-5 70" (manufactured by JASCO Corporation). [Haze]: The separator of the test light-diffusing adhesive sheet was peeled off. - 52-201011087 The measurement was carried out using an ultraviolet-visible near-infrared spectrophotometer (trade name "V-570" (manufactured by JASCO Corporation)). [Adhesive force]: The test light diffusing adhesive sheet was cut into a width of 1 inch, the separator was peeled off, and attached to a thickness of 0 in an ambient atmosphere of 23 ° C and 50% RH. A 4 mm SUS plate was pressed by a roll in accordance with JIS Z-023 7. After pressing for 24 hours, the peel strength (180 degree peel strength, stretching speed: 300 mm/min, unit parameter: N/inch) was measured using a peeling tester under the above-mentioned ambient atmosphere. [Gas expansion]: The separator of the test light-diffusing adhesive sheet was peeled off, and attached to a commercially available polyester film sheet under an ambient atmosphere of 23 ° C and 50% RH, and rolled according to JIS Z-0237. Pressed. After standing for one month in a thermo-hygrostat having an ambient atmosphere of 60 ° C and 95% RH, the flaws of the sheet were visually observed, and "gas expansion" was evaluated based on the criteria indicated below. 〇 (Qualified): No gas expansion phenomenon was observed at all △ (failed): slight gas expansion phenomenon was observed φ x (failed): gas expansion phenomenon was observed [odor]: light diffusing adhesive sheet to be tested After drying for 1 minute in an electric hot air dryer at 150 ° C, the separator was peeled off, and the degree of odor was evaluated in five stages. The less the odor is, the higher the score is, and the number of ticks is expressed as the average 値 of the judgment results of 10 people who are judged by the odor. [Surface-specific resistance 値]: After the test light-diffusing adhesive sheet was allowed to stand in an ambient atmosphere of 23 ° C and 55% RH for 24 hours, the separator was peeled off, and a surface specific resistance measuring machine (product name "HIGH RESISTANCE" was used. METER" (manufactured by Hewlett-Packard Co., Ltd.) -53- 201011087 The surface specific resistance 値(Ω /D ) of the adhesive layer. [Light diffusibility]: The separator of the test light diffusing adhesive sheet was peeled off, and fixed at a position separated by an LED light source (wafer type white type; 2, OOOmcd) by 30 mm to visually observe the diffusibility of light, according to the following The benchmark is evaluated. 〇 (qualified): LED light source can not be recognized as point light source △ (failed): LED light source can hardly be recognized as point light source X (failed): LED light source can be recognized as point light source [viewing angle (amplitude of half angle)] The test light-diffusing adhesive sheet was fixed at a position separated from the LED light source (wafer type white type; 2,000 mcd) by 40 mm, and the light transmitted through the test light diffusing adhesive sheet was used under the trade name "EZ Contrast XL88" manufactured by ELDIM Corporation. The measurement was carried out in a dark room with an illuminance of 1 lx or less. From the results obtained, the amplitude of the half-turn angle in the left-right direction and the up-and-down direction was measured for the LED light source. [Anti-glare property] The test light-diffusing adhesive sheet and the LED light source were arranged in the same manner as the above-described method of measuring the viewing angle, and the degree of scattering (glare) of the transmitted light of the LED was visually observed, and evaluation was performed based on the following criteria. 〇 (Qualified): no glare △ (failed): glare x (failed): large degree of glare -54- 201011087 (Synthesis Example 1) 2-ethylhexyl acrylate 81 · 4 parts, methacrylic acid 10 parts of ester, 5 parts of 2-hydroxyethyl methacrylate, methacrylic acid 3. 3 parts, and 2-methylpropenyloxyethyl succinate 0. Mix 3 parts to prepare a monomer mixture. In an autoclave equipped with a stirrer, a temperature regulator and a reflux cooler, 47 parts of water and sodium dodecylbenzenesulfonate were added. 02 parts as an emulsifier, and potassium persulfate 0. 4 parts were used as a polymerization initiator and the temperature was raised to 40 °C. Adding 100 parts of the above monomer mixture to the autoclave of φ, lauryl mercaptan. After 5 parts of glutinous rice as a molecular weight modifier and 29 parts of water, the mixture was stirred and emulsified, whereby a pre-formed latex was prepared. The total amount of the prepared pre-formed latex was continuously supplied to the autoclave for 4 hours while the water was 9. 85 parts, sodium hydrogen sulfite 0. 1 part, and ferrous sulfate. The polymerization initiator solution composed of 3 parts was supplied continuously for 5 hours. The polymerization reaction was carried out by stirring at 40 ° C for the first 4 hours, and then the temperature was raised to 50 ° C and stirred for 3 hours to carry out a polymerization reaction, and a total of 7 hours of polymerization was carried out, and after completion, φ 4 -type ammonium compound (D ) was added. (Product name "TMAH" (manufactured by Tama Chemical Co., Ltd.): solid content conversion, solid content concentration: 25%) 2 parts, stirred, and filtered through a 200 mesh metal mesh to obtain an aqueous latex. The number average particle diameter of the polymer particles (A-1) in the obtained aqueous latex was 180 nm. Further, the copolymer constituting the polymer particles (A-1) had a mass average molecular weight (Mw) of 800,000, a colloid fraction of 〇%, a total residual monomer concentration of 150 ppm, and a glass transition temperature of -55 t:. The results of these measurements are shown in Table 1 below. -55 - 201011087 (Synthesis Examples 2 to 4) An aqueous latex was obtained in the same manner as in the above Synthesis Example 1, except that it was shown in the following Table 1. The number average particle diameter of the polymer particles (A-1) in the obtained aqueous latex, the mass average molecular weight (Mw) of the copolymer, the colloid fraction, the total residual monomer concentration, and the glass transition temperature are shown in Table 1. .
(磺化共軛二烯系聚合物（E-1)之合成） A 響 於玻璃製反應容器加入二噁烷lOOg，將內部溫度保 持於2 5 °c，同時添加硫酸酐1 5.7 g之後，攪拌1小時，得 到硫酸酐-二噁烷錯合物。接下來，於使異戊二烯.苯乙 烯二元塊狀共聚物（異戊二烯/苯乙烯質量比=60/40、質 量平均分子量= 1 0,000 ) 1 00g溶解於二噁烷之濃度15%之 溶液’將內部溫度保持於25 °C，同時添加前述錯合物之 全量後，攪拌1小時’調製聚合物溶液（1)。另一方面 ’將水1200g、氫氧化鈉7.9g加入燒瓶，使內部溫度加溫 _ 至40 °C ’將聚合物溶液（1)之全量保持於同溫度，同時 以1〇分鐘滴下而加入。滴下結束後，保持於同溫度同時 攪拌2小時之後’藉由減壓蒸餾將溶劑全量除去，以濃度 (固體成分濃度）15%水溶液之形式合成出異戊二烯單元 經過磺化之磺化共軛二烯系聚合物（E-1)。另外，磺化 共轭一嫌系聚合物（E-1)之碌酸驗含量爲 1 .7mmol/g。 (合成例5 ) -56- 201011087 將丙烯酸2-乙基己酯70份、丙烯酸正丁酯17份、 丙烯酸2.5份、水18份、十二烷基苯磺酸鈉0.3份、聚 氧乙烯-1-(丙烯醯氧基甲基）烷基醚硫酸銨鹽（製品名 「AQUARON KH-10」（第一工業製藥公司製））1份、 磺化共軛二烯系聚合物（E-1 ) 5份裝入，攪拌而乳化， 藉此調製預製乳膠。於具備攪拌機、溫度調節器及回流式 冷卻器之高壓滅菌釜內，裝入水149份、十二烷基苯磺酸 φ 鈉0.1份、丙烯酸正丁酯5份、丙烯酸0.5份、過硫酸鉀 0.5份，進行氮氣取代之後，攪拌，同時昇溫至65°C進行 1小時聚合。接著，將調製之預製乳膠之全量花費4小時 連續滴下，同時進行聚合，自滴下結束30分鐘前開始， 將水4.9份、亞硫酸氫鈉0.05份、及硫酸亞鐵0.015份所 構成之聚合起始劑溶液花費1.5小時連續地供給。預製乳 膠之滴下結束後，於進一步攪拌2小時，使聚合完 成之後，添加4級銨化合物（D )(商品名「TMAH」（ φ 多摩化學工業公司製）：固體成分換算、固體成分濃度 2 5% ) 2份並攪拌，以200網目金屬網過濾，得到水系乳 膠。所得到之水系乳膠中之聚合物粒子（A-1)之數量平 均粒徑爲130nm。另外，構成聚合物粒子（A-1)之共聚 物之質量平均分子量（Mw)爲15萬、膠體分率爲70%、 殘留單體合計濃度爲280ppm、及玻璃轉移溫度爲-5〇。(：。 將該等測定結果表示於下述表1。 (合成例6) -57- 201011087 將丙烯酸2 -乙基己酯50.5份、丙烯酸正丁酯40.5份 、丙烯酸乙酯5份、甲基丙烯酸甲酯3份、丙烯酸1份、 硫乙醇酸辛酯0.01份、水45.6份、聚氧乙烯烷基醚硫酸 酯（烷基碳數12、EO數18) 0_5份裝入’以均質攪拌機 攪拌而乳化，藉此調製預製乳膠。於具備攪拌機、溫度調 節器、及回流式冷卻器之高壓滅菌釜內，裝入水46份、 聚氧乙烯烷基醚硫酸酯（烷基碳數12、EO數18) 0.1份 ，進行氮氣取代之後，攪拌，同時昇溫至78 °C ’添加過 _ 硫酸鉀0.07份。於5分鐘後將上述預製乳膠之全量花費3 小時連續滴下，同時將5%過硫酸銨水溶液（固體成分換 算0.19份）由其他的滴下槽花費3小時連續滴下而進行 聚合。滴下結束後保持於80t 30分鐘，接著花費30分鐘 ，將內部溫度設定於60〜65 t，將第三丁基氫過氧化物 〇.〇1份與甲醛次硫酸鈉（保險粉）0.012份，以5%水溶 液每隔10分鐘分3次添加。進一步攪拌1小時使聚合完 成之後，以氨水中和，並以200網目金屬網過濾’得到水 @ 系乳膠。所得到之水系乳膠中之聚合物粒子（A-1)之數 量平均粒徑爲150nm。另外，構成聚合物粒子（A-1 )之 共聚物之質量平均分子量（Mw)爲6萬、膠體分率爲 8 1%、殘留單體合計濃度爲l，540ppm、及玻璃轉移溫度 爲-55 t。將該等測定結果表示於下述表1。 (合成例7) 於具備攪拌機、溫度調節器、及回流式冷卻器之 -58- 201011087 容器，裝入丙烯酸正丁酯97份、丙烯酸3份、醋酸乙酯 120份、甲苯10份，進行氮氣取代之後，攪拌同時在氮 環境氣氛下加熱至68 °C，投入偶氮雙異丁腈0.07份，開 始聚合。於聚合開始2小時後將偶氮雙異丁腈〇 . 1 5份與 醋酸乙酯20份花費10分鐘滴下，進一步於聚合開始6.5 小時後添加醋酸乙酯200份’使聚合完成，得到溶劑系黏 著劑。所得到之黏著劑之質量平均分子量（Mw)爲120 〇 萬、膠體分率爲0%、殘留單體合計濃度爲13,〇〇〇ppm、 及玻璃轉移溫度爲-50 t。將該等測定結果表示於下述表(Synthesis of sulfonated conjugated diene polymer (E-1)) A was added to a glass reaction vessel to add 100 g of dioxane, the internal temperature was maintained at 25 ° C, and after adding 5.7 g of sulfuric anhydride, Stirring for 1 hour gave a sulfuric anhydride-dioxane complex. Next, the isoprene-styrene binary block copolymer (isoprene/styrene mass ratio = 60/40, mass average molecular weight = 1 0,000) 100 g dissolved in dioxane concentration 15 The solution of % was kept at an internal temperature of 25 ° C while the total amount of the above complex was added, and the mixture was stirred for 1 hour to prepare a polymer solution (1). On the other hand, 1200 g of water and 7.9 g of sodium hydroxide were placed in a flask, and the internal temperature was heated to ～40 ° C. The total amount of the polymer solution (1) was kept at the same temperature, and the mixture was added dropwise at 1 minute. After the completion of the dropwise addition, the mixture was stirred at the same temperature for 2 hours, and then the solvent was completely removed by distillation under reduced pressure, and the sulfonation of the isoprene unit by sulfonation was synthesized in the form of a concentration (solid content concentration) of 15% aqueous solution. Ytene-based polymer (E-1). Further, the sulfonated conjugated polymer (E-1) had an acid content of 1. 7 mmol/g. (Synthesis Example 5) -56-201011087 70 parts of 2-ethylhexyl acrylate, 17 parts of n-butyl acrylate, 2.5 parts of acrylic acid, 18 parts of water, 0.3 parts of sodium dodecylbenzenesulfonate, polyoxyethylene- 1-(propylene methoxymethyl) alkyl ether sulfate ammonium salt (product name "AQUARON KH-10" (manufactured by Daiichi Kogyo Co., Ltd.)) 1 part, sulfonated conjugated diene polymer (E-1 5 parts were charged, stirred and emulsified, thereby preparing a pre-formed latex. In an autoclave equipped with a stirrer, a temperature regulator and a reflux cooler, 149 parts of water, 0.1 parts of sodium decylbenzenesulfonate φ, 5 parts of n-butyl acrylate, 0.5 parts of acrylic acid, and potassium persulfate were charged. After 0.5 parts of nitrogen was substituted with nitrogen, the mixture was stirred while raising the temperature to 65 ° C for 1 hour. Next, the entire amount of the prepared pre-formed latex was continuously dropped for 4 hours, and polymerization was carried out simultaneously, and polymerization of 4.9 parts of water, 0.05 parts of sodium hydrogen sulfite, and 0.015 parts of ferrous sulfate was started from 30 minutes before the end of the dropwise addition. The starter solution was supplied continuously for 1.5 hours. After the completion of the dropwise addition of the pre-formed latex, the mixture was further stirred for 2 hours to complete the polymerization, and then a 4-grade ammonium compound (D) (trade name "TMAH" (manufactured by Tama Chemical Industry Co., Ltd.): solid content conversion, solid content concentration 2 5 was added. 2 parts and stirred, and filtered through a 200 mesh metal mesh to obtain an aqueous latex. The polymer particles (A-1) in the obtained aqueous latex had an average particle diameter of 130 nm. Further, the copolymer constituting the polymer particles (A-1) had a mass average molecular weight (Mw) of 150,000, a colloid fraction of 70%, a total residual monomer concentration of 280 ppm, and a glass transition temperature of -5 Torr. (: The results of the measurements are shown in Table 1 below. (Synthesis Example 6) -57- 201011087 50.5 parts of 2-ethylhexyl acrylate, 40.5 parts of n-butyl acrylate, 5 parts of ethyl acrylate, and methyl group 3 parts of methyl acrylate, 1 part of acrylic acid, 0.01 part of octyl thioglycolate, 45.6 parts of water, polyoxyethylene alkyl ether sulfate (alkyl carbon number 12, EO number 18) 0_5 parts charged 'mixed with a homomixer Emulsification, thereby preparing pre-formed latex. In an autoclave equipped with a stirrer, a temperature regulator, and a reflux cooler, 46 parts of water, polyoxyethylene alkyl ether sulfate (alkyl carbon number 12, EO number) 18) 0.1 part, after nitrogen substitution, stir, and simultaneously raise the temperature to 78 ° C. Add 0.07 parts of potassium sulfate. After 5 minutes, the total amount of the above pre-formed latex is continuously dropped for 3 hours while 5% ammonium persulfate is added. The aqueous solution (0.19 parts by mass of solid content) was continuously dropped by another dropping tank for 3 hours to carry out polymerization. After the completion of the dropping, the mixture was kept at 80 t for 30 minutes, and then it was taken for 30 minutes, and the internal temperature was set to 60 to 65 t. Base hydroperoxide 〇.〇1 part Formaldehyde sodium sulfoxylate (insurance powder) 0.012 parts, added in 5% aqueous solution every 10 minutes in 3 minutes. After further stirring for 1 hour to complete the polymerization, it is neutralized with ammonia and filtered with 200 mesh metal mesh to obtain water@ Latex. The number average particle diameter of the polymer particles (A-1) in the obtained aqueous latex is 150 nm. Further, the copolymer constituting the polymer particles (A-1) has a mass average molecular weight (Mw) of 60,000. The colloid fraction was 81%, the total residual monomer concentration was 1,540 ppm, and the glass transition temperature was -55 t. The results of the measurements are shown in Table 1 below. (Synthesis Example 7) With a stirrer and temperature adjustment -58- 201011087 Container, filled with 97 parts of n-butyl acrylate, 3 parts of acrylic acid, 120 parts of ethyl acetate, 10 parts of toluene, after nitrogen substitution, stirring and heating under nitrogen atmosphere The polymerization was started by adding 0.07 parts of azobisisobutyronitrile to 68 ° C. After 2 hours from the start of the polymerization, azobisisobutyronitrile was added. 15 parts and 20 parts of ethyl acetate were dropped for 10 minutes, and further polymerization was carried out. Add ethyl acetate after 6.5 hours from the start 200 parts of 'polymerization was completed, and a solvent-based adhesive was obtained. The obtained mass average molecular weight (Mw) of the adhesive was 1.2 million, the colloid fraction was 0%, and the total residual monomer concentration was 13, 〇〇〇ppm, And the glass transition temperature is -50 t. The results of these measurements are shown in the following table.
-59- 201011087-59- 201011087
【i 1合成例7 1 ON m Ο 0.22 00 I 〇 13000 〇 vp 合成例ό I 50.5 | 40.5 «η Ο 0.07 0.19 0.01 0.012 0.01 00 00 1540 up 1合成例5 1 〇 fS m ο * Vi d 0.05/0.015 IT) 130 «Τϊ 〇 280 ΙΟ 合成例4 卜 m ο m d 0.1/0.03 0.05 § ο 沄 220 卜 tr> 合成例3 | 〇 — m ο ο ο 0.1/0.03 0.05 Ο ψ-^ Ο 〇 400 m »n 合成例2 76.3 ο 寸 c> <Ν Ο ο 寸 ο 0.1/0.03 0.05 ο ο 〇 320 o in 合成例1 1 1__8Μ_1 〇 m ο ο 甘 ο 0.1/0.03 0.05 ο i 〇 丙烯酸2-乙基己酯 丙烯酸正丁酯 丙烯酸乙酯 甲基丙烯酸甲酯 苯乙烯 丙烯酸環己酯 甲基丙烯酸丁酯 甲基丙烯酸2-羥乙酯 甲基丙烯酸 琥珀酸2-甲基丙烯醯氧基乙基酯 丙烯酸 磺化聚合物 合計 過硫酸鉀 過硫酸銨 亞硫麵纖亞鐵 第三丁基氫過氧化物 甲醛次硫麵 偶氮雙異丁腈 月桂基硫醇 硫乙醇酸辛酯 /—S Ρ Μ 聚合物粒子之數量平均粒徑(nm) 重量平均分子量(Mw)(萬） _體分率(％) 殘留單體量(ppm) 玻璃轉移溫度ΓΟ 單體 聚合起 始劑 1分子量I 調節劑 共聚物物性値 配方 //ΛΛ 1 頰 -60- 4 201011087 (有機系微粒子（B)(聚合物粒子（B-l))之合成） (合成例8) 使含有單分散聚苯乙烯粒子（數量平均粒徑：〇.2μιη 、質量平均分子量（Mw) : 1 0.000 ) 7.5份、及十二烷基 苯磺酸鈉0.3份之乳膠昇溫至85°C，在過硫酸鉀1.5份之 存在下，將苯乙烯97份、甲基丙烯酸3份、及第3十二 烷基硫醇5份花費3小時添加，進行以單分散聚苯乙烯粒 @ 子作爲種子粒子之種子乳化聚合，藉此調製含有聚合物粒 子（i)之乳膠。調製之乳膠中之聚合物粒子（i)之數量 平均粒徑爲0.5 μιη，凝固物幾乎沒有發生。 使含有上述聚合物粒子（i) 10份及十二烷基苯磺酸 鈉0.3份之乳膠昇溫至85 °C，在過硫酸鉀1.5份之存在下 ，將苯乙烯97份、甲基丙烯酸3份、及第3十二烷基硫 醇5份花費3小時添加，進行以聚合物粒子（i )作爲種 子粒子之種子乳化聚合，藉此調製含有聚合物粒子（ii) φ 之乳膠。調製之乳膠中之聚合物粒子（ii)之數量平均粒 徑爲Ιμιη，凝固物幾乎沒有發生。 使含有上述聚合物粒子（ii) 2.5份、十二烷基苯磺 酸鈉0.3份之乳膠昇溫至85t，在過硫酸鉀1.5份之存在 下，將苯乙烯97份、甲基丙烯酸3份、及第3十二烷基 硫醇5份花費3小時添加，進行以聚合物粒子（ii )作爲 種子粒子之種子乳化聚合，藉此調製含有聚合物粒子（iii )(聚合物粒子（B-1))之乳膠。調製之乳膠中之聚合 物粒子（iii)之數量平均粒徑爲2.9μιη，凝固物幾乎沒有 201011087 發生。 (合成例9) 將二（3,5,5-三甲基己醯基）過氧化物（商品名「 PEROYL 355」（日本油脂公司製）、水溶解度：〇.〇1%) 2份作爲聚合起始劑、月桂基硫酸鈉0.1份作爲乳化劑、 及水20份攪拌而乳化後’以超音波均質機進一步微粒子 化，調製水性分散體（以下記載爲「水性分散體（X)」 )。於所得到之水性分散體（X )添加數量平均粒徑 1.0μιη之單分散聚苯乙烯粒子15份，攪拌16小時。接著 ，加入苯乙烯70份、二乙烯基苯20份、及甲基丙烯酸縮 水甘油酯1 〇份，於40°C緩慢地攪拌3小時，使單分散聚 苯乙烯粒子吸收上述單體成分。其後’藉由昇溫至75 °C ，進行3小時聚合反應，得到含有聚合物粒子（a)之水 系乳膠。另外，聚合物粒子（a)之數量平均粒徑1.8μιη ，凝固物幾乎沒有發生。 將前述水性分散體（X) 22.1份與前述聚合物粒子（ a) 20份（固體成分換算）混合，攪拌16小時。接著， 加入苯乙烯90份及三羥甲基丙烷三甲基丙烯酸酯10份， 於40°C緩慢地攪拌3小時，使聚合物粒子（a)吸收單體 成分。其後，藉由昇溫至75 °C進行3小時聚合反應，得 到包含聚合物粒子（a)與聚合物粒子（b)連接之聚合物 粒子（c )之水系乳膠。聚合物粒子（c )之形狀爲不倒翁 狀，聚合物粒子（b)之數量平均粒徑爲Ιμιη、聚合物粒 -62- 201011087 子（c)之數量平均粒徑爲3.5μιη。另外，凝固物幾乎沒 有發生8 (合成例1 〇 ) 藉由使用苯乙烯95份、甲基丙烯酸3份、第3十二 烷基硫醇2份作爲鏈移動劑、及過硫酸鈉2份作爲水溶性 起始劑進行乳化聚合，製造數量平均分子量爲5萬、數量 φ 平均粒徑爲Ι.Ομιη之單分散粒子。將所得到之單分散粒子 30份添加於前述水性分散體（X)，攪拌16小時。接著 ，藉由加入苯乙烯80份及二乙烯基苯20份，於40 °C緩 慢地攪拌3小時，使單分散粒子吸收各單體。其後，藉由 添加苯乙烯-α-甲基苯乙烯-丙烯酸共聚合組成物（商品 名「JONCRYL 603 0」 （Johnson Polymer 公司製））5 份 ，昇溫至75 °C，進行3小時聚合反應，得到種子粒子（ 以下記載爲「種子粒子（Y )」）。所得到之種子粒子（ φ Y)之數量平均粒徑爲1.5 μιη，凝固物幾乎沒有發生。 將所得到之種子粒子（Υ) 60份添加於前述水性分散 體（X )，攪拌12小時後，加入商品名「JONCRYL 6030 j ( Johnson Polymer公司製）5份，調製水系乳膠（1 ) 。另一方面，調製苯乙烯40份及二乙烯基苯10份所構成 之單體混合液（II)以及甲基丙烯酸甲酯40份及三羥甲 基丙烷三甲基丙烯酸酯（商品名「LIGHT ESTER TMP」 (共榮社化學公司製））10份所構成之單體混合液（III )。將單體混合液（III)連續地添加至單體混合液（II) -63- 201011087 ，同時將單體混合液（II)連續地添加至昇溫至75 °C之水 系乳膠（1)，同時進行聚合。此時，以單體混合液（II )及單體混合液（III )花費2小時全部添加至水系乳膠 (1)之方式調整添加速度。添加結束後，藉由使系統昇 溫至80 °C ’進一步進行1小時聚合，得到有機系微粒子 之水系乳膠。所得到之有機系微粒子，係具有使折射率由 中心部之種子粒子（Y)之表面向外側連續變化之表層部 。另外，所得到之有機系微粒子之數量平均粒徑爲2·0μχη ^ ，凝固物幾乎沒有發生。另外，將所得到之有機系微粒子 使用切片機切斷，對其剖面進行釕染色，使用穿透式電子 顯微鏡觀察之結果，可確認在表層部之中，由最內殼部分 向最外殼部分，顏色徐緩地變淺。 (實施例1 ) 相對於在合成例1所得到之水系乳膠95份（但是就 固體成分而言）添加聚合物粒子（iii) 5份，充分地攪拌 @ 使聚合物粒子（iii)分散。進一步添加聚乙二醇二縮水甘 油醚（環氧系交聯劑）0.0 5份，得到光擴散性黏著劑組成 物。另外，|ηΑ-ηΒ丨爲0.12。將所得到之光擴散性黏著劑組 成物’以乾燥後之膜厚成爲25μιη之方式，塗佈於厚度 38 μπι之PET薄膜上，於1〇〇 °C乾燥2分鐘使其硬化，形 成光擴散黏著層。將厚度25μιη之分隔件壓著於光擴散黏 著層’在23°C、50%RH熟化7天，得到測試用光擴散性 黏著薄片。所得到之測試用光擴散性黏著薄片之全光線透 -64 - 201011087 過率爲92%、霧度爲82%、黏著力爲5.8N/inch、表面固 有電阻値爲2.5Ε+11Ω/□，臭氣評估結果爲「5分（合 格）」、氣體膨脹之目視評估結果爲「〇（合格）」'光 擴散性評估結果爲「〇（合格）」。將該等評估結果表示 於下述表2。 (實施例2~9、比較例1~4 ) 除了定爲表示於下述表2配方以外，係以與實施例1 相同之方式得到光擴散性黏著劑組成物。另外，丨nA-nB丨表 示於下述表2。另外，使用所得到之光擴散性黏著劑組成 物，與上述實施例1之情況相同地得到測試用光擴散性黏 著薄片。將所得到之測試用光擴散性黏著薄片之全光線透 過率、霧度 '黏著力、及表面固有電阻値之測定結果，以 及氣體膨脹、臭氣、光擴散性之評估結果表示於下述表2 〇 9 -65- 201011087 比較例4 § 〇 〇 0.12 v〇 00 Ον 00 X 7.9E+14 < 比較例3 § 〇 0.12 Μ g On rn X m 8.3E+14 < 比較例2 § 〇 〇 1.24 «Λ VD (N »〇 〇 v*> 6.4E+11 1 X 比較例1 § 〇 0.11 Ό wS < v-> 7.6E+11 X 資施例9| § ο 0.12 m 〇\ Os cn 〇 2.1E+10 〇 丨實施例8| § Ο 0.12 os ON 00 rn 〇 2.6E+10 〇 實施例71 〇 0.12 σ\ <S — 〇 14E+10 〇 實施例6| 〇 0.12 落 On cn 〇 v-» 6.2E+11 〇 實施例5 g 〇 0.12 00 — 〇 VJ 2.2E+11 〇 實施例4 〇 0.12 1 〇 3.8E+11 〇 實施例3 jn CM 0.12 00 00 ON VO 〇 \Ti 5.4E+11 〇 實施例2 § Ο 0.12 宝 ri 〇 to 3.8E十 11 〇 實施例1 «η 0.12 CN On S3 00 vS 〇 w-j 2.5E+11 〇 合成例1 合成例2 合成例3 1合成例4 1合成例5 合成例6 合成例7 合成例8 合成例9 合成例ίο 交聯聚苯乙烯粒子#1 含水砂酸鎂微粒子#2 氧化鈦微粒子#3 環氧系交聯劑.1 異氰酸酯系交聯sf2 ! ~a 全光線透過率(％) 霧度(％) 黏著力(NZinch)SUS板 氣體膨脹(@視評估） 臭氣 表面固有電阻値(Ω〇 光擴散性(目視評估） 丙烯酸系 有機系微 粒子 無機系微 粒子 硬化劑 彻I試用光擴散性 黏著薄片性能 評估 配方 ///Λ\ 1 itIiff<43ump2nx0d^[n-「131VNOeiou」^ng®:<N* 雜liff^ixaUK-sUSBocEU -「3l-TXH18Bsa」wng®:r u.z :»55fei, E^dI®^5?Jb: e=tt 8S.1 :#te!te, i 卜：¾¾¾^: s 6S. I :»&&, ΕΞ1.9 :®^irK)-: 1# 201011087 (實施例1 〇) 於以圓弧部之曲率半徑爲30μηι，節距爲40μιη之方 式排列微透鏡之蠅眼透鏡用之金屬模具，充塡將丙铺酸胺 甲酸乙酯30份、1，6-己二醇二丙烯酸酯20份、三環癸院 二甲醇丙烯酸酯50份、及1-羥環己基苯基酮3份均勻地 混合所得到之UV硬化性樹脂組成物，將環烯烴聚合物（ 商品名「ARTON」 （JSR公司製）、厚度ΐ〇〇μιη)按壓住 φ ’同時照射1 J/cm2之紫外線，藉此得到幾乎沒有彎曲之 蠅眼透鏡（以下稱爲「微透鏡薄膜A-1」）。 將在實施例2所得到之測試用光擴散性黏著薄片之分 隔件剝離而露出之光擴散黏著層貼合於所得到之微透鏡薄 膜A-1之形成有透鏡之面與反對側之面，製作測試用光學 構件。所得到之測試用光學構件之半値角的幅度（視野角 )，在上下方向爲70度，左右方向爲72度，而爲具有充 分之視野角，另外，光擴散性之評估結果爲「〇（合格） φ 」，防眩性之目視評估結果爲「〇（合格）」。將該等評 估結果表示於下述表3。 (比較例5) 如下述表3所表示般，使用在比較例4所得到之測ί ^ 用光擴散性黏著薄片以外，係以與實施例1 〇相同之方$ 製作測試用光學構件，進行上述各種評估。將該等評Μ 果表示於下述表3。 -67- 201011087 (實施例11 ) 於節距爲50μιη、頂角爲90度之金字塔型四角錐形狀 複數排列之微稜鏡用之金屬模具充塡前述UV硬化性樹脂 組成物，將環儲烴聚合物（商品名「ARTON」（JSR公司 製）、厚度ΙΟΟμιη)按壓住，同時照射ij/cin2之紫外線 ，藉此得到幾乎沒有彎曲之微稜鏡（以下稱爲「微透鏡薄 膜A-2」）。 將在實施例2所得到之測試用光擴散性黏著薄片之分 隔件剝離而露出之光擴散黏著層貼合於所得到之微透鏡薄 膜A-2之形成有透鏡之面與反對側之面，製作測試用光學 構件。所得到之測試用光學構件之半値角的幅度（視野角 )，在上下方向爲92度，左右方向爲92度，而爲具有充 分之視野角，另外，光擴散性之評估結果爲「〇（合格） 」，防眩性之目視評估結果爲「〇（合格）」。將該等評 估結果表示於下述表3。 (實施例1 2及1 3以及比較例6 ) 除了使用表示於下述表3之測試用光擴散性黏著薄片 以外，係以與實施例1 1相同之方式製作測試用光擴散性 黏著薄片，進行上述各種評估。將該等評估結果表示於下 述表3。 -68- 201011087[i 1 Synthesis Example 7 1 ON m Ο 0.22 00 I 〇 13000 〇vp Synthesis Example 5 I 50.5 | 40.5 «η Ο 0.07 0.19 0.01 0.012 0.01 00 00 1540 up 1 Synthesis Example 5 1 〇fS m ο * Vi d 0.05/ 0.015 IT) 130 «Τϊ 〇280 ΙΟ Synthesis Example 4 卜m ο md 0.1/0.03 0.05 § ο 沄 220 卜tr> Synthesis Example 3 | 〇— m ο ο ο 0.1/0.03 0.05 Ο ψ-^ Ο 〇400 m » n Synthesis Example 2 76.3 ο 寸 c><Ν Ο ο ο ο 0.1/0.03 0.05 ο ο 〇 320 o in Synthesis Example 1 1 1__8Μ_1 〇m ο ο 甘ο 0.1/0.03 0.05 ο i 2- 2-ethyl acrylate Ester butyl acrylate acrylate ethyl methacrylate styrene acrylate cyclohexyl methacrylate butyl methacrylate 2-hydroxyethyl methacrylate succinic acid 2-methyl propylene oxiranyl ethyl acrylate sulfonate Polymerization total potassium persulfate ammonium persulfate sulfite surface ferrous iron tert-butyl hydroperoxide formaldehyde subsulfide azobisisobutyronitrile lauryl mercaptan thioglycolate octyl ester / -S Ρ Μ Number average particle diameter (nm) Weight average molecular weight (Mw) (Million) _ Body fraction (%) Residual monomer amount (ppm) Glass transfer temperature 单体 Monomer polymerization initiator 1 Molecular weight I Modifier copolymerization Physical properties 値 formulation // ΛΛ 1 Cheek-60- 4 201011087 (Synthesis of organic microparticles (B) (polymer particles (Bl))) (Synthesis Example 8) Containing monodisperse polystyrene particles (number average particle diameter) : 〇.2μιη, mass average molecular weight (Mw): 1 0.000) 7.5 parts, and sodium laurylbenzene sulfonate 0.3 parts of the latex is heated to 85 ° C, in the presence of 1.5 parts of potassium persulfate, styrene 97 parts, 3 parts of methacrylic acid, and 5 parts of the 30th dodecyl mercaptan were added for 3 hours, and the seed emulsion polymerization was carried out by using monodisperse polystyrene particles@ as seed particles, thereby preparing polymer particles. (i) Latex. The number of polymer particles (i) in the prepared latex was 0.5 μm, and the coagulum hardly occurred. The latex containing 10 parts of the above polymer particles (i) and 0.3 parts of sodium dodecylbenzenesulfonate was heated to 85 ° C, and 97 parts of styrene and methacrylic acid 3 were present in the presence of 1.5 parts of potassium persulfate. The mixture and 5 parts of the 30th dodecyl mercaptan were added in an amount of 3 hours, and the polymer particles (i) were used as seed particles to carry out emulsion polymerization, thereby preparing a latex containing the polymer particles (ii) φ. The number average particle diameter of the polymer particles (ii) in the prepared latex was Ιμιη, and the coagulum hardly occurred. The emulsion containing 2.5 parts of the above polymer particles (ii) and 0.3 parts of sodium dodecylbenzenesulfonate was heated to 85 t, and 97 parts of styrene and 3 parts of methacrylic acid were present in the presence of 1.5 parts of potassium persulfate. And 5 parts of the 30th dodecyl mercaptan are added for 3 hours, and the seed particles of the polymer particles (ii) are used as the seed particles, thereby preparing the polymer particles (iii) (polymer particles (B-1). )) Latex. The number average particle diameter of the polymer particles (iii) in the prepared latex was 2.9 μm, and the coagulum hardly occurred in 201011087. (Synthesis Example 9) Two parts of bis(3,5,5-trimethylhexyl) peroxide (trade name "PEROYL 355" (manufactured by Nippon Oil & Fats Co., Ltd.), water solubility: 〇.〇1%) were used. The polymerization initiator, 0.1 part of sodium lauryl sulfate as an emulsifier, and 20 parts of water were stirred and emulsified, and then further micronized by an ultrasonic homogenizer to prepare an aqueous dispersion (hereinafter referred to as "aqueous dispersion (X)"). . To the obtained aqueous dispersion (X), 15 parts of monodisperse polystyrene particles having a number average particle diameter of 1.0 μm were added, and the mixture was stirred for 16 hours. Next, 70 parts of styrene, 20 parts of divinylbenzene, and 1 part by weight of glycidyl methacrylate were added, and the mixture was slowly stirred at 40 ° C for 3 hours to allow the monodisperse polystyrene particles to absorb the above monomer components. Thereafter, the polymerization was carried out for 3 hours by raising the temperature to 75 ° C to obtain a water-based latex containing the polymer particles (a). Further, the number average particle diameter of the polymer particles (a) was 1.8 μm, and the coagulum hardly occurred. 22.1 parts of the aqueous dispersion (X) was mixed with 20 parts of the polymer particles (a) (in terms of solid content), and stirred for 16 hours. Next, 90 parts of styrene and 10 parts of trimethylolpropane trimethacrylate were added, and the mixture was slowly stirred at 40 ° C for 3 hours to cause the polymer particles (a) to absorb the monomer components. Thereafter, polymerization was carried out for 3 hours by raising the temperature to 75 ° C to obtain a water-based latex containing the polymer particles (c) in which the polymer particles (a) and the polymer particles (b) were bonded. The polymer particles (c) have a shape of a tumbler, the number average particle diameter of the polymer particles (b) is Ιμηη, and the number average particle diameter of the polymer particles -62 to 201011087 (c) is 3.5 μm. In addition, the coagulum hardly occurred 8 (Synthesis Example 1) by using 95 parts of styrene, 3 parts of methacrylic acid, 2 parts of a 30th dodecyl mercaptan as a chain shifting agent, and 2 parts of sodium persulfate. The water-soluble initiator is subjected to emulsion polymerization to produce monodisperse particles having a number average molecular weight of 50,000 and a number φ of an average particle diameter of Ι.Ομιη. 30 parts of the obtained monodisperse particles were added to the aqueous dispersion (X), followed by stirring for 16 hours. Next, by adding 80 parts of styrene and 20 parts of divinylbenzene, the mixture was slowly stirred at 40 ° C for 3 hours to allow the monodisperse particles to absorb the respective monomers. Then, by adding 5 parts of a styrene-α-methylstyrene-acrylic acid copolymerization composition (trade name "JONCRYL 603 0" (manufactured by Johnson Polymer Co., Ltd.)), the temperature was raised to 75 ° C, and polymerization was carried out for 3 hours. The seed particles (hereinafter referred to as "seed particles (Y)") are obtained. The number average particle diameter of the obtained seed particles (φ Y) was 1.5 μm, and the coagulum hardly occurred. 60 parts of the obtained seed particle (Υ) was added to the aqueous dispersion (X), and after stirring for 12 hours, 5 parts of the trade name "JONCRYL 6030 j (manufactured by Johnson Polymer Co., Ltd.) was added to prepare a water-based latex (1). On the one hand, a monomer mixture (II) composed of 40 parts of styrene and 10 parts of divinylbenzene, and 40 parts of methyl methacrylate and trimethylolpropane trimethacrylate (trade name "LIGHT ESTER" TMP" (manufactured by Kyoeisha Chemical Co., Ltd.)) 10 parts of a monomer mixture (III). The monomer mixture (III) is continuously added to the monomer mixture (II) -63 to 201011087 while the monomer mixture (II) is continuously added to the aqueous latex (1) heated to 75 ° C while Perform polymerization. At this time, the addition rate was adjusted so that the monomer mixture (II) and the monomer mixture (III) were all added to the aqueous latex (1) for 2 hours. After the completion of the addition, the system was further heated to 80 ° C for one hour to carry out polymerization to obtain an aqueous emulsion of organic fine particles. The obtained organic fine particles have a surface layer portion in which the refractive index is continuously changed from the surface of the seed particles (Y) at the center portion to the outside. Further, the number average particle diameter of the obtained organic fine particles was 2·0 μχη ^ , and the coagulum hardly occurred. In addition, the obtained organic fine particles were cut with a microtome, and the cross section was subjected to enamel dyeing, and as a result of observation by a transmission electron microscope, it was confirmed that the innermost shell portion was the outermost shell portion among the surface layer portions. The color slowly becomes shallower. (Example 1) 5 parts of the polymer particles (iii) were added to 95 parts of the aqueous latex obtained in Synthesis Example 1 (but in terms of solid content), and the polymer particles (iii) were sufficiently stirred. Further, 0.05 parts of polyethylene glycol diglycidyl ether (epoxy crosslinking agent) was added to obtain a light diffusing adhesive composition. Further, |ηΑ-ηΒ丨 was 0.12. The obtained light-diffusing adhesive composition ' was applied to a PET film having a thickness of 38 μm so as to have a thickness of 25 μm after drying, and dried at 1 ° C for 2 minutes to be hardened to form light diffusion. Adhesive layer. A spacer having a thickness of 25 μm was pressed against the light-diffusing adhesive layer to be aged at 23 ° C and 50% RH for 7 days to obtain a light-diffusing adhesive sheet for testing. The obtained light diffusing adhesive sheet has a total light transmittance of -64 - 201011087, an overshoot rate of 92%, a haze of 82%, an adhesive force of 5.8 N/inch, and a surface specific resistance of 2.5 Ε + 11 Ω / □. The odor evaluation result is "5 points (qualified)", and the visual evaluation result of gas expansion is "〇 (qualified)" and the light diffusivity evaluation result is "〇 (qualified)". The results of these evaluations are shown in Table 2 below. (Examples 2 to 9 and Comparative Examples 1 to 4) A light-diffusing adhesive composition was obtained in the same manner as in Example 1 except that the formulation shown in Table 2 below was used. In addition, 丨nA-nB丨 is shown in Table 2 below. Further, a light diffusing adhesive sheet for testing was obtained in the same manner as in the above Example 1 using the obtained light diffusing adhesive composition. The measurement results of the total light transmittance, the haze 'adhesion force, and the surface specific resistance , of the obtained light diffusing adhesive sheet, and the evaluation results of gas expansion, odor, and light diffusibility are shown in the following table. 2 〇9 -65- 201011087 Comparative Example 4 § 〇〇0.12 v〇00 Ον 00 X 7.9E+14 <Comparative Example 3 § 〇0.12 Μ g On rn X m 8.3E+14 < Comparative Example 2 § 〇〇 1.24 «Λ VD (N »〇〇v*> 6.4E+11 1 X Comparative Example 1 § 〇0.11 Ό wS <v-> 7.6E+11 X Example 9| § ο 0.12 m 〇\ Os Cn 〇2.1E+10 〇丨Example 8| § Ο 0.12 os ON 00 rn 〇2.6E+10 〇Example 71 〇0.12 σ\ <S — 〇14E+10 〇Example 6| 〇0.12 落On cn 〇v-» 6.2E+11 〇Example 5 g 〇0.12 00 — 〇VJ 2.2E+11 〇Example 4 〇0.12 1 〇3.8E+11 〇Example 3 jn CM 0.12 00 00 ON VO 〇\Ti 5.4 E+11 〇Example 2 § Ο 0.12 宝 ri 〇 to 3.8E 十一 11 〇 Example 1 «η 0.12 CN On S3 00 vS 〇wj 2.5E+11 〇 Synthesis Example 1 Synthesis Example 2 Synthesis Example 3 Synthesis Example 4 Synthesis Example 5 Synthesis Example 6 Synthesis Example 7 Synthesis Example 8 Synthesis Example 9 Synthesis Example ίο Crosslinked Polystyrene Particle #1 Hydrated Magnesium Hydroxide Microparticles #2 Titanium Oxide Microparticles #3 Epoxy Crosslinking Agent. 1 Isocyanate Crosslinking sf2 ! ~a Whole Light Transmission Rate (%) Haze (%) Adhesion (NZinch) SUS plate gas expansion (@ 视 evaluation) Odor surface specific resistance 値 (Ω 扩散 light diffusibility (visual evaluation) Acrylic organic microparticle inorganic microparticle hardener I try the light diffusing adhesive sheet performance evaluation formula / / / it \ itIiff<43ump2nx0d^[n-"131VNOeiou"^ng®:<N* miscellaneous liff^ixaUK-sUSBocEU - "3l-TXH18Bsa" wng®:r Uz :»55fei, E^dI®^5?Jb: e=tt 8S.1 :#te!te, i Bu:3⁄43⁄43⁄4^: s 6S. I :»&&, ΕΞ1.9 :®^irK )-: 1# 201011087 (Embodiment 1 〇) The fly eyes of the microlens are arranged in such a manner that the radius of curvature of the circular arc portion is 30 μm and the pitch is 40 μm. The metal mold for the lens is filled with 30 parts of ethyl acesulfame, 20 parts of 1,6-hexanediol diacrylate, 50 parts of tricyclic brothel dimethanol acrylate, and 1-hydroxycyclohexylbenzene. 3 parts of the ketone was uniformly mixed with the obtained UV-curable resin composition, and the cycloolefin polymer (trade name "ARTON" (manufactured by JSR), thickness ΐ〇〇μηη) was pressed against φ' while irradiating 1 J/ The ultraviolet light of cm2 is used to obtain a fly-eye lens (hereinafter referred to as "microlens film A-1") which is hardly curved. The light-diffusing adhesive layer which was peeled off by the separator of the test light-diffusing adhesive sheet obtained in Example 2 was adhered to the surface on which the lens of the obtained microlens film A-1 was formed and the opposite side. A test optical member was produced. The amplitude (viewing angle) of the half-corner angle of the obtained optical member for the test was 70 degrees in the up-and-down direction and 72 degrees in the left-right direction, and had a sufficient viewing angle, and the evaluation result of the light diffusibility was "〇 ( Qualified) φ ", the visual evaluation result of anti-glare is "〇 (qualified)". The results of these evaluations are shown in Table 3 below. (Comparative Example 5) A test optical member was produced in the same manner as in Example 1 except that the light-diffusing adhesive sheet obtained in Comparative Example 4 was used as shown in the following Table 3. Various assessments above. These evaluation results are shown in Table 3 below. -67-201011087 (Example 11) The metal mold for micro-doping of a pyramid-shaped quadrangular pyramid shape having a pitch of 50 μm and a apex angle of 90 degrees is filled with the UV curable resin composition, and the hydrocarbon is stored in the ring. The polymer (trade name "ARTON" (manufactured by JSR), thickness ΙΟΟμηη) is pressed and irradiated with ultraviolet rays of ij/cin2, thereby obtaining microscopic flaws which are hardly bent (hereinafter referred to as "microlens film A-2". "). The light-diffusing adhesive layer which was peeled off by the separator of the test light-diffusing adhesive sheet obtained in Example 2 was adhered to the surface on which the lens of the obtained microlens film A-2 was formed and the opposite side. A test optical member was produced. The amplitude (viewing angle) of the half-turn angle of the obtained optical member for the test was 92 degrees in the up-and-down direction and 92 degrees in the left-right direction, and had a sufficient viewing angle, and the evaluation result of the light diffusibility was "〇 ( "Qualified)", the visual evaluation result of anti-glare is "〇 (qualified)". The results of these evaluations are shown in Table 3 below. (Examples 1 and 2 and Comparative Example 6) A test light-diffusing adhesive sheet was produced in the same manner as in Example 11 except that the test light-diffusing adhesive sheet shown in Table 3 below was used. Perform the various assessments above. The results of these evaluations are shown in Table 3 below. -68- 201011087
[表3] 實施例10 實施例11 實施例12 實施例13 比較例5 比較例6 測試用光擴散性黏著薄片 實施例2 實施例2 實施例8 實施例9 比較例4 比較例4 基材（微透鏡薄膜） A-1 A-2 A-2 A-2 A-1 A-2 測試用光學構 件性能評估 視野角(半値 角的幅度） 上下方向(度） 70 92 92 94 58 64 左右方向(度） 72 92 93 93 56 66 光擴散性(目視評估） 〇 〇 〇 〇 〇 〇 防眩性(目視評估） 〇 〇 〇 〇 Δ X 由前述表2及表3看來明顯地，本發明之光擴散性黏 著薄片，在全光線透過率、霧度、光擴散性等方面表現出 優異之性質，可形成視野角、光擴散性、及防眩性優異之 光學構件。 [產業上之可利用性] 本發明之光擴散性黏著薄片，係適合於形成：用於使 LED或液晶用背光等光源沒有眩光、均勻且平面地發光之 光學構件；構成沒有來自液晶面板構造之干涉圖型等，明 亮度•色彩變化少而辨認性優異之液晶顯示裝置之光學構 件；及可有效率地將有機EL面板光源之光線取出之光學 構件。 -69-[Table 3] Example 10 Example 11 Example 12 Example 13 Comparative Example 5 Comparative Example 6 Light diffusing adhesive sheet for testing Example 2 Example 2 Example 8 Example 9 Comparative Example 4 Comparative Example 4 Substrate ( Microlens film) A-1 A-2 A-2 A-2 A-1 A-1 A-2 Evaluation of optical components for testing Visual field of view (amplitude of half-turn angle) Up-and-down direction (degrees) 70 92 92 94 58 64 Left and right direction ( Degree) 72 92 93 93 56 66 Light diffusivity (visual evaluation) 〇〇〇〇〇〇Anti-glare (visual evaluation) 〇〇〇〇Δ X It is apparent from the above Table 2 and Table 3 that the light of the present invention The diffusing adhesive sheet exhibits excellent properties in terms of total light transmittance, haze, light diffusibility, and the like, and can form an optical member excellent in viewing angle, light diffusibility, and anti-glare property. [Industrial Applicability] The light-diffusing adhesive sheet of the present invention is suitable for forming an optical member for illuminating a light source such as an LED or a liquid crystal backlight without glare and uniformly and planarly emitting light; An optical member of a liquid crystal display device having excellent brightness and color change and excellent visibility, and an optical member capable of efficiently extracting light from an organic EL panel light source. -69-