201245370 六、發明說明： 【發明所屬之技術領域】 本發明係關於在包含吸附配向有二色 :：!Trr^#(p〇iarizer)""^- ㈣β明樹脂的保護膜而成之偏光板⑽arizing 而 P ate)、以及在該偏光板上積層相位差膜等其他光學層 成之積層光學構件。 【先前技術】 偏光板係有餘作為構成液晶顯示裝置之鮮零件之 一。偏光板itf具有在偏糾㈣面積層㈣賴之結構， 並組裝於液晶顯示裝置。亦已知僅在偏光件單面設置保護 膜’但大錄的情形下，會在另—面上，並無合單純之 保護膜’而是貼合具有其他光學機能之層以兼作為保護膜。 此=，偏光件之製造方法係廣泛採用將經二色性色素染色 之單軸延伸之聚乙烯醇系樹脂薄膜以硼酸處理並水洗後， 將其乾燥之方法。 通常’係在上述水洗及乾燥之後，直接於偏光件貼合 保護膜。此係因乾燥後之偏光件的物理強度弱，一旦將其 捲取則在加工方向會有容易裂開等之問題。因此，通常在 乾燥後之偏光件上直接塗佈屬於聚乙烯醇系樹脂之水溶液 的水系接著劑，並經由該接著劑而在偏光件之兩面同時貼 合保護膜。就通例而言，保護膜係使用厚度30至100//m 之三醋酸纖維素薄膜。 三醋酸纖維素係透明性優異，容易形成各種表面處理 324109 4 201245370 層及光學機能層，此外’其透濕度高，具有可令使用上述 水系接著劑而貼合於偏光件後的乾燥順利地進行等作為保 護膜之優異的優點’但另一方面，因透濕度高，故將其作 為保s蔓膜而貼合之偏光板係在濕熱下，例如溫度7 〇 、才目 對濕度90%之條件下有容易引起劣化等之問題。在此，亦 已知有以透濕度較三醋酸纖維素更低之例如降获婦 (norbornene)系樹脂作為代表例之非晶性聚烯烴系樹脂當 作保護膜。 胃 將包含透濕度低之樹脂的保護膜貼合於聚乙埽醇系偏 光件時，若使用以往在將聚乙烯醇系偏光件與三醋酸纖維 素薄膜貼合時一般所使用之聚乙烯醇系樹脂之水溶液作為 接著劑，則接著強度不足，或會有所得偏光板之外觀不2 的問題。其理由係透濕度低之樹脂薄膜一般為疎水性，以 及因透濕度低而使屬於溶媒之水無法充分乾燥等。另一方 面，已知在偏光件之兩面貼合不同種類之保護膜。例如， 也有提案如在偏光件之一面上貼合包含非晶性聚烯烴系樹 月曰專透扁度低之樹脂的保護膜，並在偏光件之另一面上貼 合包含以三醋酸纖維素為首之纖維素系樹脂等透濕度高之 樹脂的保護膜。 於是，嘗試使用光硬化性接著劑，以達成在包含透濕 度低之樹脂的保護膜與聚乙烯醇系偏光件之間賦予高的接 著力’同時也在纖維素系樹脂等透濕度高之樹脂與聚乙稀 醇系偏光件之間賦予高的接著力。例如，日本特開2004-245925號公報（專利文獻丨）揭糸以不含芳香環之環氧化合 324109 5 201245370 物作為主成份之接_，並提案以藉由活⑽量線之 具體來說係以藉由紫外線之照射所致之陽離子聚入*、、、 接著劑硬化，而將偏光件與保護膜予以接著.。此=，使該 特開腫-25·號公報（專利文獻2)揭示將脂’曰本 化合物與不含有脂環式環氧基之環氧化合物予以組工合衣氧 摻配光陽離子聚合私狀光硬化性接著^ 與保護膜之接著的技術。 元仔 (先前技術文獻） (專利文獻） 專利文獻1 :曰本特開2004-245925號公報 專利文獻2 :日本特開2008-257199號公報 【發明内容】 (發明欲解決的課題） 但是，專利文獻丨及專利文獻2所具體揭示之 者劑，其黏度並不一定會夠低，不一定可 偏光件所貼合之保護膜上而形成為== 接者劑層。此外，該等接著劑中也有會溶 而亦會因該溶解而造成氣泡缺陷。 膜者， 本發明之課題為提供一種偏光板，其係使用在將 且=於偏光件時可在室溫下塗佈之具有充分低之點度： 不會溶解保護狀光硬化性接著劑，而 ^合者。本發㈣p個課題為提供―種積層^， "系在該偏光板上積層相位差膜等其他光 液晶顯示裝置者。 予層麵用於 324109 6 201245370 (解決課題之手段） 本發明者為了解決相關課題而進行精心研究，結果完 成本發明。具體來說，係發現在光陽離子硬化性成份中摻 配預疋里之光％離子聚合起始劑而成的光硬化性接著^ 中，使用摻配有下述成份之組成物作為光陽離子硬化性成 份係屬有效：摻配以特定之脂環式二環氧化合物為主體， 其中在分子内具有2個不鍵結於脂環式環之環氧基（ep〇xy group)且連結基為分支伸烷基般具有分支結構之2價基的 二環氧丙基（diglycidyl)化合物；同時復少量地掺配分子 内具有1個不鍵結於脂環式環之環氧基的單官能環氧化合 物。亦即，係發現該特定組成之光硬化性接著劑，其溶解 保護膜的能力小，且在室溫下顯示低黏度並可賦予良好之 塗佈適性，同時在硬化後可堅固地接著偏光件與保護膜。 本發明包括以下内容。 [1] 一種偏光板，其係由包含吸附配向有二色性色素 之聚乙烯醇系樹脂薄膜的偏光件、以及在該偏光件之至少 一面經由接著劑而貼合成的包含透明樹脂的保護膜所構 成；該接著劑係由光硬化性接著劑所形成，該光硬化性接 者劑含有光陽離子硬化性成份（A)1〇〇重量份與光陽離子 聚合起始劑⑻1至10重量份’上述光陽離子硬化性成份 (A)係以其整體量為基準，含有下述量之⑷）、⑽）及（A3); 將上述保護膜於23t下浸潰於上述光硬化性接著劑2天 時，該保護膜之重量減少〇至重量％ ; 下式（I)所表示之脂環式二環氧化合物（A1) 3〇至85 324109 7 201245370 重量％;201245370 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a protective film comprising a two-color::!Trr^#(p〇iarizer)"" The polarizing plate (10) is arizing and P ate), and a laminated optical member in which another optical layer such as a retardation film is laminated on the polarizing plate. [Prior Art] The polarizing plate is one of the fresh parts constituting the liquid crystal display device. The polarizing plate itf has a structure in which the (four) area layer (4) is biased and assembled, and is assembled in a liquid crystal display device. It is also known that a protective film is provided only on one side of the polarizing member. However, in the case of large recording, there is no simple protective film on the other surface, but a layer having other optical functions is bonded to serve as a protective film. . In the method of producing a polarizer, a method in which a uniaxially stretched polyvinyl alcohol-based resin film dyed with a dichroic dye is treated with boric acid, washed with water, and dried is widely used. Usually, after the above washing and drying, the protective film is bonded directly to the polarizing member. This is because the physical strength of the polarizer after drying is weak, and once it is taken up, there is a problem that it is easily broken in the processing direction. Therefore, a water-based adhesive which is an aqueous solution of a polyvinyl alcohol-based resin is usually directly applied onto the polarizing member after drying, and a protective film is simultaneously bonded to both surfaces of the polarizing member via the adhesive. For the general case, the protective film is a cellulose triacetate film having a thickness of 30 to 100 / / m. The cellulose triacetate is excellent in transparency, and it is easy to form various surface treatments 324109 4 201245370 layers and optical functional layers, and has a high moisture permeability, and can be smoothly dried after being adhered to the polarizing member using the water-based adhesive. As an excellent advantage of the protective film, on the other hand, since the moisture permeability is high, the polarizing plate which is bonded as a smear-proof film is subjected to moist heat, for example, a temperature of 7 〇, and the humidity is 90%. There are problems such as deterioration and the like under conditions. Here, an amorphous polyolefin-based resin such as a norbornene-based resin having a lower moisture permeability than cellulose triacetate is known as a protective film. When a protective film containing a resin having a low moisture permeability is bonded to a polyethylene terephthalate polarizer, the polyvinyl alcohol which is generally used when a polyvinyl alcohol-based polarizer is bonded to a cellulose triacetate film is used. When the aqueous solution of the resin is used as an adhesive, the strength is insufficient or the appearance of the obtained polarizing plate is not 2. The reason is that the resin film having a low moisture permeability is generally water-repellent, and the water belonging to the solvent cannot be sufficiently dried due to the low moisture permeability. On the other hand, it is known to apply different types of protective films on both sides of the polarizing member. For example, there is also a proposal to adhere a protective film comprising a resin having a low porosity of amorphous polyolefin-based sapphire, and a cellulose-containing cellulose triacetate on the other side of the polarizing member. A protective film of a resin having a high moisture permeability such as a cellulose resin. Then, it is attempted to use a photocurable adhesive to achieve a high adhesion force between a protective film containing a resin having a low moisture permeability and a polyvinyl alcohol-based polarizer, and also a resin having a high moisture permeability such as a cellulose resin. A high adhesion force is imparted to the polarizing member of the polyvinyl alcohol. For example, Japanese Laid-Open Patent Publication No. 2004-245925 (Patent Document No.) discloses that an epoxidized 324109 5 201245370 containing no aromatic ring is used as a main component, and is proposed to be specific by the living (10) line. The polarizer and the protective film are adhered to by cation polymerization*, and then hardening by ultraviolet irradiation. This is disclosed in Japanese Laid-Open Patent Publication No. Hei-5-A (Patent Document 2), which discloses the preparation of a compound of a lipid compound and an epoxy compound containing no alicyclic epoxy group. The photocurability is followed by a technique followed by a protective film. 。 。 。 。 。 。 ( ( ( ( ( ( ( ( ( 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利The adhesive disclosed in the document and the patent document 2 does not necessarily have a low viscosity, and may not be formed on the protective film to which the polarizing member is attached to form a == connector layer. In addition, these adhesives are also soluble and may cause bubble defects due to the dissolution. Membrane, the object of the present invention is to provide a polarizing plate which is used at a room temperature and which can be applied at room temperature with a sufficiently low degree of disintegration: a protective photocurable adhesive is not dissolved, And ^ fit. In the fourth issue of the present invention, the "substrate layer" is provided, and other optical liquid crystal display devices such as a retardation film are laminated on the polarizing plate. The above-mentioned level is used for 324109 6 201245370 (Means for Solving the Problem) The inventors of the present invention have conducted intensive studies to solve the related problems, and as a result, have invented the invention. Specifically, it has been found that a photocurable hardening component is blended with a photo-ionic polymerization initiator in a pre-tank, and photohardenability is obtained by using a composition doped with the following components as photocationic hardening. Sexual ingredients are effective: the compound is mainly composed of a specific alicyclic diepoxide compound, wherein there are two epoxy groups (ep〇xy group) which are not bonded to the alicyclic ring in the molecule and the linking group is a divalent diglycidyl compound having a branched structure and having a branched structure; and a small amount of a monofunctional ring having no epoxy group bonded to the alicyclic ring in the molecule Oxygen compound. That is, it has been found that the photocurable adhesive of the specific composition has a small ability to dissolve the protective film, and exhibits low viscosity at room temperature and can impart good coating suitability, and can be firmly followed by a polarizing member after hardening. With a protective film. The present invention includes the following. [1] A polarizing plate comprising a polarizing material comprising a polyvinyl alcohol-based resin film which adsorbs a dichroic dye, and a protective film containing a transparent resin which is bonded to at least one surface of the polarizer via an adhesive. The adhesive is formed of a photocurable adhesive containing a photocationic curable component (A) in an amount of 1 part by weight and a photocationic polymerization initiator (8) in an amount of 1 to 10 parts by weight. The photocationic curable component (A) contains the following amounts (4)), (10)) and (A3) based on the total amount; and the protective film is immersed in the photocurable adhesive at 23 t for 2 days. When the weight of the protective film is reduced to 5% by weight; the alicyclic diepoxide compound (A1) represented by the following formula (I) is 3〇 to 85 324109 7 201245370% by weight;
式中R及R各自獨立地表示氫原子或碳數1至6之 燒基’但院基為碳數3以上時則可具有脂環結構；X表示 氧原子、碳數1至6之院二基（alkanediyl)、或下式㈤ ^(Id)之任-者所表示之2價基，在此，Y1至Y4各自表示 反數1至2G之院―基，但碳數3以上時則可具有脂環結 構；a及b各自表示〇至2〇之整數； (la) (lb) (lc) (ld) - 8彳〇一丫4七〇 一 CH2· η 〇 一 C—〇—丫2一〇一^一 2' ο ΟWherein R and R each independently represent a hydrogen atom or a carbon group having 1 to 6 carbon atoms; but when the carbon number is 3 or more, the group may have an alicyclic structure; X represents an oxygen atom and a carbon number of 1 to 6 A divalent group represented by alkanediyl or the following formula (5) ^(Id), where Y1 to Y4 each represent a hospital-base of the inverse number 1 to 2G, but when the carbon number is 3 or more, Has an alicyclic structure; a and b each represent an integer of 〇 to 2〇; (la) (lb) (lc) (ld) - 8彳〇一丫4七〇一CH2· η 〇一C—〇—丫2一一一一一2' ο Ο
—CH2-〇—C~Y3-c—O-CH —CH2+〇—CH: 量％ ; 下式（II)所表示之二環氧丙基化合物（A2) 1至69重 (Π) ^__^ch2-o—z—〇—CH2 式中’Ζ表示碳數2至8之分支伸烷基、或式 -所表示之2價基，在此，_ζι_表示_〇_、_c〇一〇-或-0-C0- ;ra及η之一者表示1以上之整數，另一者表示2 以上之整數’惟兩者合計為8以下；並且，CraH2m& Cnii2n^ 324109 8 201245370 一者表示分支之2價飽和烴基； 下式（III)所表示之單官能環氧化合物（A3) i至69重 量％; απ) r3—〇—ch2Vs \7 式中’ R3表示碳數1至15之烷基。 [2]如[1]所述之偏光板，其中，在表示單官能環氧化 合物（A3)之式（111)中’ R3為碳數6至1〇之烧基。 [3 ]如[1 ]或[2 ]所述之偏光板，其中，上述光硬化性 接著劑在25°C之黏度為 lOOmPa · sec 以下 其中，上述光 [4] 如[1]至[3]任一項所述之偏光板 硬化性接著劑係經硬化。 [5] 如[1]至[4]任一項所述之偏光板，其中，於偏光 件至少一面所貼合之保護膜，係包含摻配紫外線吸收劑之 醋酸纖維素系樹脂者。 [6] 如[1]至[4]任一項所述之偏光板，其中，於偏光 t至^一面所貼合之保護膜，係包含由非晶性聚烯烴系樹 月曰、聚酯系樹脂及鏈狀聚烯烴系樹脂所成群組中所選出之 透明樹脂者。 [7] —種積層光學構件，其係包含[1]至[6]任一者所 述之偏光板與其他光學層之積層體者。 [8] 如[7]所述之積層光學構件，其中，上述其他光學 層含有相位差膜。 (發明之效果） 324109 201245370 本發明中’成為貼合偏光件與保護膜之光硬化性接著 主成份的光陽離子硬化性絲（A)，絲用分別播配預 =量之知％式二環氧化合物（A1)、於連結基具備具有分支 結構之2價基（典型為分支伸烧基）之二環氧丙基化合物 (A2)、及單官能環氧化合物（A3)者，而使該光硬化性接著 劑為低黏度且難以溶解保護膜，此外，在室溫下黏度亦低 而使塗佈魏優異。因此，若在偏光件之至少-面上經由 該光硬化n接著劑而貼合包含透明樹脂之保護膜，即可大 幅降低因保護觀解所造成之氣泡缺陷，並可製成偏光件 與保蒦膜之接著性良好之偏光板^此外，於該偏光板積層 其他光學層之積層光學構件也同樣地為缺陷少者。θ 【實施方式】 以下詳細說明本發明之實施形態。本發明係提供於包 含聚乙_系樹脂薄狀偏光件上，經由級化性接著劑 而貼合包含透⑽脂之倾膜的偏光板。此外，本發明亦 提供於該偏光板上積層其他光學層之積層光學構件。以 下’針對在製造偏光板時所使用之光硬化性接著劑、使用 該光硬化性接㈣之偏光板、*制光學構件， 說明。 τ [光硬化性接著劑] 本發明卜用以在包含聚乙婦醇系樹月旨薄膜之偏光件 上貼合包含透㈣狀保制的光硬化性接㈣，係含 以下（Α)及（Β)二成份： ’、 (Α)光陽離子硬化性成份、及 324109 10 201245370 • (B)光陽離子聚合起始劑。 (光陽離子硬化性成份） 作為光硬化性接著劑之主成份，且藉由聚合硬化而賦 予接著力之光陽離子硬化性成份（A)係含有以下三種化人 物。 (A1)前述式（I)所表示之脂環式二環氧化合物、 (A2)前述式（π)所表示之二環氧丙基化合物、及 (A3)前述式（ΠΙ)所表示之單官能環氧化合物。 在表示脂環式二環氧化合物（Ai)之前述式（！）中，^ 及R2各自獨立地表示氫原子或碳數丨至6烷基，但烷基為 碳數3以上時可具有脂環結構。在式（1)中當鍵結於環 己烷環的位置為卜位（因此，2個環己烷環中之環氧基之位 置皆為3, 4-位）時，該烷基可鍵結於卜位至6〜位之二一位 置。該烷基當然可為直鏈，而在碳數3以上時可為分^。 =外，如上所述，碳數3以上時可具有脂環結構。具有脂 %結構之烷基其典型的例子係環戊基及環己基。 —同樣地，在式⑴中，連結2個3, 4_環氧環己燒環的X， 系氧原子碳數1至6之燒二基或前述式（ia)至（Μ)之任 一者所表示之2價基。在此，烧二基係包括伸燒基（aikyiene) 及亞烧基（alkylidene)之概念，伸烧基可為直鍵，而在破 數3以上時可為分支。 此外，當X為前述式（la)至（Id)之任一者所表示之2 價基時，各式中之連結基、γ2、γ4係各自為碳數i 至20之燒—基，該烧二基之碳數為3以上時可具有脂環結 324109 11 201245370 構。該等烷二基當然亦可為直鏈，而在碳數3以上時也可 為分支。此外，如上所述，碳數3以上時可具有脂環結構。 具有脂環結構之烧二基的典型例係伸環戊基及伸環己基。 若要具體說明式（I)所表示之脂環式二環氧化合物 (A1)’則式（I)中X為前述式（ia)所表示之2價基且該式中 a為0的化合物係3, 4-環氧環己基曱醇（碳數i至6之烷基 可鍵結於該環己烷環）與3, 4-環氧環己烷羧酸（碳數i至6 之炫》基可鍵結於该壞己烧環）之醋化物。該具體例可列舉 如：3, 4-環氧環己烷羧酸3, 4-環氧環己基甲酯[在式（1) (惟X為a =0之式（la)所表示之2價基）中，RkRkH之化 合物]、3, 4-環氧-6-甲基環己烷羧酸3, 4-環氧-6-甲基環 己基曱酯[在具有與上述相同之X的式（丨）中，ri=6_甲基、 R2=6-甲基之化合物]、3,4-環氧-1-曱基環己烷羧酸3, 4— 環氧-1-甲基環己基甲酯[在具有與上述相同之X的式 中，R1=卜甲基、R2=l-甲基之化合物]、3, 4-環氧-3-甲基 環己烷羧酸3, 4-環氧-3-甲基環己基曱酯[在具有與上述 相同之X的式（I)中，R〗=3-甲基，R2=3-曱基之化合物]等。 式（I)中X為式（lb)所表示之2價基的化合物，係烧二 醇類與3, 4-環氧環己烷羧酸（碳數1至6之烷基可鍵結於 該環己烷環）之酯化物。式（I)中X為式（Ic)所表示之2價 基的化合物’係脂肪族二羧酸類與3, 4-環氧環己基甲醇 (碳數1至6之烷基可鍵結於該環己烷環）之酯化物。此外， 式（I)中X為式（Id)所表示之2價基的化合物，係3, 4-環 氧環己基甲醇（碳數1至6之烷基可鍵結於該環己烷環）的 324109 12 201245370 醚類（b=〇時），或是烷二醇類或聚烷二醇類與3,4_環氧環 己基甲醇（碳數1至6之烷基可鍵結於該環己烷環）之醚化 物（b> 〇時）。 在表示二環氧丙基化合物（A2)之前述式（η)中，z為 碳數3至8之分支伸烧基、或式一所表示之2 價基。在此，-Z1-為-〇-、-CO-〇-或-〇〜c〇__ ; m及n之一者 為1以上之整數，另一者為2以上之整數，兩者合計為8 以下’並且，及CnH2n之一者為分支之2價飽和烴基。 式（Π)中z為分支伸烷基之化合物係分支院二醇之二 環氧丙基醚，該具體例可列舉如丙二醇二環氧丙基醚、13_ I二醇二環氧丙基醚、1，2-丁二醇二環氧丙基醚、新戊二 醇一環氧丙基醚、3-曱基-1，5-戊二醇二環氧丙基醚、2-曱基〜辛二醇二環氧丙基謎、1，4~環已烧二曱醇等。 a此外’式（11)中z為上述式-所表示之2 價基的化合物，係相當於Z為分支伸烷基且該伸烷基之c-C 鍵被—〇~、~C0-0-或-0-C0-所中斷之情形。 在表示單官能環氧化合物之前述式（III)中，R3為碳數 1至丨5之烷基。該烷基當然可為直鏈，而在碳數3以上時 也可為77支。該烧基較佳為碳數較多者，例如為碳數6以 上，更佳為碳數6至1〇之範圍。其中較佳為分支之烷基。 式（π I)所表示之單官能環氧化合物之典型例可列舉如2_ 乙基己基環氧丙基鱗。 以光陽離子硬化性絲⑷之整體量為基準，光陽離子 硬化性成份⑴中之脂環式二環氧化合物⑷）的量為30至 324109 13 201245370 85重量％。該量較佳為40至80重量％，更佳為6〇至75重 量％。若光陽離子硬化性成份（A)中之脂環式二環氧化人物 (A1)的量過少，則硬化會不足’並使偏光件/保護膜間的密 著力降低。另一方面，若該量過多，則以下所述之二環氧 丙基化合物（A2)及單官能環氧化合物（A3)的量會相對變 少’而難以達成本發明所圖之光硬化性接著劑之低黏度化。 此外，光陽離子硬化性成份（A)中，於連結基具有分支 結構之二環氧丙基化合物（A2)的量為1至69重量％。該量 較佳為5至50重量％，更佳為5至30重量％。光陽離子硬 化性成份（A)中，二環氧丙基化合物（A2)量若多於69重量％ 則硬化會不足，並使偏光件/保護膜間之密著力降低。 再者，光陽離子硬化性成份（A)中，單官能環氧化合物 (A3)的量為1至69重量。/。。該量較佳為2至50重量％，更 佳為2至15重量％。光陽離子硬化性成份（A)中之單官能環 氧化合物（A3)的量若多於69重量％則硬化會不足，並使偏 光件/保賴狀㈣力降低。 ^ 構成光硬化性接著劑之光陽離子硬化性成份（A)分別 以上述說明的比例而含有上述說明之脂環式二環氧化合物 (A1)、於連結基具有分支結構之二環氧丙基化合物（A2)及 單s忐環氧化合物（A3)。為了更有效地達成在硬化前之光 硬化性接著劑之低黏度化、及由該硬化物而提升偏光件與 保護膜之間的密著力，故較佳係以光硬化性接著劑之整體 置為基準’使二環氧丙基化合物（A2)及單官能環氧化合物 (A3)之合計量為25重量％以上。 324109 14 201245370 脂環式二環氧化合物（A1)、於連結基具有分支結構之 二環氧丙基化合物⑽及單官能環氧化合物⑽在以上所 說明的1之㈣内時，光陽料硬化性成份（A)可含有其他 陽離子聚合性化合物。 (光陽離子聚合起始劑） 本發明中’由於是將上述光陽離子硬化性成份以藉由 活性能量線照射所致之陽離子聚合而進行硬化以形成接著 劑層，故光硬化性接著_祕中摻配有光陽離子聚合起 始劑⑻。光陽離子聚合起始劑為藉由可見光線、紫外線、 X線或電子線等活性能量線的照射，而產生陽離子種或路 易t酸，以起始光陽離子硬化性成份（A)之聚合反應者。因 光，離子聚合起始劑係以光進行催化作用，&即使混合至 光陽離子硬化性成份（A)中，其保存安定性及作業性也優 =。藉由照射活性能量線而產生陽離子種或路易士酸之化 ^物’例如可列舉如：^:香族重氮鹽（diaz〇nium salt)、 方香族錤鹽（iodonium salt)及芳香族锍鹽（suif〇ni⑽ salt)專錄]鹽（onium salt);鐵-丙二歸錯合物等。 芳香族重氮鹽可列舉例如以下之化合物： 六氟錄酸苯重氮鹽、 六氟嶙酸苯重氮鹽、 六氟硼酸苯重氮鹽等。 芳香族鎭鹽可列舉例如以下化合物： 四（五氟笨基）硼酸二苯基錤鹽、 六氟磷酸二笨基錤鹽、 324109 15 201245370 六氟錄酸二笨基錤鹽、 六氟磷酸二（4-壬基苯基）鏘鹽等。 芳香族錡鹽可列舉例如以下化合物： 六氟磷酸三苯基錡鹽、 六氟銻酸三苯基銃鹽、 四（五氟苯基）硼酸三苯基錡鹽、 雙六氟磷酸4, 4’ -雙[二笨基錡基]二苯基硫化物（4, 4, _bis [diphenylsulfoniojdiphenyl sulfide bishexafluorophosphate)、 雙六氟銻酸4, 4’-雙[二（石_羥基乙氧基）苯基疏基]二苯 基硫化物、 雙六氟磷酸4, 4’-雙[二（y3_羥基乙氧基）笨基锍基]二苯 基硫化物、 六氟銻酸7-[二（對曱苯曱醯基）銃基]-2-異丙基噻吨酮 (7-[di(p-toluyl)sulfonio]-2-isopropylthioxanthone hexafluoroantimonate)、 四（五氟苯基）硼酸7-[二（對曱苯曱醯基）錡基]-2-異丙基 α塞吨_、 六氟磷酸4-苯基羰基-4’ -二苯基銃基-二笨基硫化物、 六氟銻酸4-(對第三丁基苯基羰基）-4’-二苯基锍基-二苯 基硫化物、 四（五氟苯基）硼酸4-(對第三丁基笨基羰基）_4,-二（對甲 苯甲醯基）疏基-二苯基硫化物等。 鐵-丙二烯錯合物可列舉例如以下化合物： 324109 16 201245370 六氟銻酸二曱笨-環戊二烯基鐵（π)、 六氟磷酸異丙笨（cumene)-環戊二烯基鐵（II)、 二甲苯-環戊二烯基鐵（II)三（三氟甲基磺醯基）曱基化 物（xylene-cyclopentadienyliron(II) tris (trifluoromethylsulfonyl)methanate)等0 該等光陽離子聚合起始劑可分別單獨地使用，也可混 合2種以上使用。該等中，特別是芳香族疏鹽係因在3〇〇nm 附近之波長領域亦具有紫外線吸收特性，故可賦予硬化性 優異且具有良好機械強度及接著強度之硬化物，而適合使 用。 相對於光陽離子硬化性成份（A)整體1〇〇重量份，光陽 離子聚合起始劑（B)之摻配量為1至1〇重量份。藉由對每 1〇〇重量份光陽離子硬化性成份（A)摻配1重量份以上光陽 離子聚合起始劑’可使光陽離子硬化性成份（A)充分硬化， 對所得之偏光板賦予高機械強度與接著強度。另一方面， 若其量過多，則硬化物中的離子性物質會增加，因而可能 使硬化物之吸濕性提高並使偏光板之耐久性能降低，因 此，每100重量份光陽離子硬化性成份以）中，光陽離子聚 η起始劑（B)的量為10重量份以下。每1〇〇重量份之光陽 離子硬化性成份（Α)中，光陽離子聚合起始劑⑻之摻配量 較佳為2重量份以上、6重量份以下。 (可摻配於練錄接著射之其他錄） 本發明之光硬化性接著劑中，除了上述之含有環氧化 σ物之光陽離子硬化性成份（Α)及光陽離子聚合起始劑⑻ 324109 17 201245370 以外，亦可含有一般已知摻配於光硬化性樹脂或接著劑中 之其他成份。其他成份的適合例可列舉如光敏劑及光敏助 劑。光敏劑係在較光陽離子聚合起始劑（B)所顯示的最大吸 收波長更長之波長顯示最大吸收’是促進光陽離子聚合起 始劑（B)之聚合起始反應的化合物。此外，光敏助劑係更加 促進光敏劑之作用的化合物。依據保護膜之種類不同，該 光敏劑較佳為復摻配光敏助劑。 光敏劑較佳為在較380nm更長之波長的光下顯示最大 吸收的化合物。前述光陽離子聚合起始劑（B)係在300nm 附近或更短之波長顯示最大吸收，並感應該附近波長之光， 而產生陽離子種或路易士酸，以起始光陽離子硬化性成份 (A)之陽離子聚合，但若摻配上述光敏劑，則也會感應較長 之波長，特別是較380nm更長之波長的光。該光敏劑係以 使用蔥系化合物為有利。蔥系光敏劑之具體例可列舉如以 下化合物： M0-二甲氧基蔥、 9, 10-二乙氧基蔥、 M0-二丙氧基蔥、 9,1〇 一二異丙氧基蔥、 9, 10-二丁氧基蔥、 9,10-二戊氧基蔥、 9，10-二己氧基蔥、 9，1〇-雙（2_曱氧基乙氧基）蔥、 9, 10-雙（2_乙氧基乙氧基）蔥、 324109 18 201245370 • 9, 10-雙（2-丁氧基乙氧基）蔥、 9, 10-雙（3-丁氧基丙氧基）蔥、 2-甲基-或2-乙基-9, ίο-二甲氧基蔥、 2-曱基-或2-乙基-9, 1Q_二乙氧基惠、 2-甲基-或2-乙基-9, 10一二丙氧基蔥、 2-甲基-或2-乙基-9，10_二異丙氧基葱、 2-甲基-或2-乙基~9, 10-二丁氧基蔥、 2-曱基-或2-乙基-9, 10_二戊氧基蔥、 2-甲基-或2-乙基-9, 10-二己氧基蔥等。 "若於光硬化性接著劑中摻配上述光敏劑，則與未推配 光敏劑時之情形相tb，接著劑之硬化性有所提升。相對於 〇陽離子硬化性成份（A)100重量份’若摻配光敏劑〇. !重 T伤以上’則會顯現該效果m若光敏劑之換配 量變多，則在低溫保管時會產生析出等之問題，因此，相 對於光陽離子硬化性成份（A) 1〇〇重量份，該量較佳為2重 I伤以下。伙維持偏光板之中性灰（neutrai gray)之觀點 來看，在使偏光件與保護膜之接著力保持在適度之範圍下， 以將光敏劑之摻配量設為越少越為有利，例如，相對於光 陽離子硬化性成份（A) 100重量份，將光敏劑的量設為0. 1 至0. 5重量份’更佳為在〇. 1至〇. 3重量份之範圍。 其次，說明光敏助劑。光敏助劑雖也有各種類型者’ 但以使用萘系化合物為有利。萘系光敏助劑之具體例可列 舉如以下化合物： 4-曱氧基-1-萘酚、 324109 19 201245370 4-乙氧基-1-萘酚、 4-丙氧基-1-萘酚、 4_ 丁氧基-1-蔡紛、 4-己氧基-1-萘酚、 1，4-二曱氧基萘、 卜乙氧基-4-曱氧基萘、 1，4-二乙氧基萘、 1，4-二丙氧基萘、 1，4-二丁氧基萘等。 若於光硬化性接著劑中摻配萘系光敏助劑，則與未摻 配萘系光敏助劑時之情形相比，接著劑之硬化性有所提升。 相對於光陽離子硬化性成份（A)100重量份，若摻配萘系光 敏助劑0.1重量份以上，則會顯現該效果。另一方面，若 案'系光敏助劑之摻配量變多，則在低溫保管時會產生析出 等之問題，因此’相對於光陽離子硬化性成份（A)100重量 份，該量較佳為5重量份以下，更佳為3重量份以下。 (光硬化性接著劑之物性） 以上說明之光硬化性接著劑係如前述，係用以在包含 聚乙烯醇系樹脂薄膜之偏光件上貼合保護膜而製造偏光 板。此時，若接著劑會溶解保護膜，則還是如前述，會因 該溶解而在偏光板中產生氣泡缺陷。本發明中，因採用摻 配有以預疋比例含有以上說明之特定3種類化合物的光陽 離子硬化性絲（A)之光硬化性接著劑，特別是採用連結基 具有分支結構者（典型上其連結基為分支料基之化合物） 324109 20 201245370 作為其中之二環氧丙基化合物（A2) ’而製成難以溶解保護、 膜之接著劑。亦即，將構成偏光板之保護膜在23tTg、、主 於該接著劑中2天時，該保護膜之重量減少〇至3〇重量^ 在此，將保護膜浸潰於接著劑時之重量減少，係以下 述方式求得。亦即，首先將構成保護膜之透明樹脂薄膜裁 切為適當大小，並求得該重量。其次，將該經裁切之薄膜 浸潰於以液體狀態調製且溫度保持為2 3 °C之光硬化性接 著劑中，放置2天後取出，將附著於表面之接著劑擦拭去 除後，求得該重量。然後，依據下式求出浸潰後之重量減 少〇 重量減少（％) = (1-浸潰後之薄膜重量/浸潰前之薄膜重量）-CH2-〇-C~Y3-c-O-CH-CH2+〇-CH: Amount %; Diepoxypropyl compound represented by the following formula (II) (A2) 1 to 69 weight (Π) ^__^ Ch2-o-z-〇-CH2 where 'Ζ denotes a branched alkyl group having a carbon number of 2 to 8, or a divalent group represented by the formula -, wherein _ζι_ means _〇_, _c〇一〇- Or -0-C0-; one of ra and η represents an integer of 1 or more, and the other represents an integer of 2 or more 'but the total of 8 is equal to or less; and, CraH2m& Cnii2n^ 324109 8 201245370 a monovalent epoxy compound represented by the following formula (III): i to 69% by weight; απ) r3—〇—ch2Vs \7 wherein R 3 represents an alkyl group having 1 to 15 carbon atoms. [2] The polarizing plate according to [1], wherein, in the formula (111) representing the monofunctional epoxide (A3), 'R3 is a carbon group having 6 to 1 carbon atoms. [3] The polarizing plate according to [1], wherein the photocurable adhesive has a viscosity at 25 ° C of 100 mPa · sec or less, wherein the light [4] is as [1] to [3]. The polarizing plate hardenable adhesive according to any one of the invention is cured. [5] The polarizing plate according to any one of [1] to [4], wherein the protective film to be bonded to at least one surface of the polarizing member comprises a cellulose acetate-based resin to which a UV absorber is blended. [6] The polarizing plate according to any one of [1] to [4], wherein the protective film adhered to one side of the polarized light t to the side comprises an amorphous polyolefin tree, a polyester, a polyester A resin selected from the group consisting of a resin and a chain polyolefin resin. [7] A laminated optical member comprising the laminate of the polarizing plate and the other optical layer described in any one of [1] to [6]. [8] The laminated optical member according to [7], wherein the other optical layer contains a retardation film. (Effects of the Invention) 324109 201245370 In the present invention, the photocationic curable filament (A) which is a photocurable adhesive and a main component of the protective polarizer and the protective film is used, and the yarn is separately mixed with a pre-quantity amount. An oxygen compound (A1) having a di-epoxypropyl compound (A2) having a branched structure and a divalent epoxy group (typically a branched alkyl group) and a monofunctional epoxy compound (A3) The photocurable adhesive has a low viscosity and is difficult to dissolve the protective film. Further, the viscosity is also low at room temperature, and the coating is excellent. Therefore, if the protective film containing the transparent resin is bonded to the at least one surface of the polarizer via the photo-curing n-adhesive agent, the bubble defect caused by the protective observation can be greatly reduced, and the polarizing member can be made and protected. The polarizing plate having good adhesion to the bismuth film is also the same as the laminated optical member in the other optical layer in which the polarizing plate is laminated. θ [Embodiment] Hereinafter, embodiments of the present invention will be described in detail. The present invention is provided on a thin polarizing member comprising a polyethylene-based resin, and a polarizing plate comprising a pour film of a (10) grease is bonded via a graded adhesive. Further, the present invention also provides a laminated optical member in which other optical layers are laminated on the polarizing plate. Hereinafter, the photocurable adhesive used in the production of the polarizing plate, the polarizing plate using the photocurable bonding (4), and the optical member made of * will be described. τ [Photocurable adhesive] The present invention is used for bonding a photocurable material (4) containing a transparent (tetra) shape to a polarizing material comprising a polyacetate alcohol-based film, and the following (Α) (Β) Two components: ', (Α) photocationic hardening component, and 324109 10 201245370 • (B) Photocationic polymerization initiator. (Photocation-curable component) The photo-cationic curable component (A) which is a main component of the photocurable adhesive and which imparts an adhesive force by polymerization hardening contains the following three kinds of persons. (A1) an alicyclic diepoxy compound represented by the above formula (I), (A2) a diepoxypropyl compound represented by the above formula (π), and (A3) a single represented by the above formula (ΠΙ) Functional epoxy compound. In the above formula (!) representing the alicyclic diepoxy compound (Ai), R and R2 each independently represent a hydrogen atom or a carbon number to 6 alkyl group, but the alkyl group may have a carbon number of 3 or more. Ring structure. In the formula (1), when the position bonded to the cyclohexane ring is a position (thus, the positions of the epoxy groups in the two cyclohexane rings are all 3, 4-position), the alkyl group may be bonded. It is in the position of the second position of the 6th position. The alkyl group may of course be a straight chain, and may be a fraction when the carbon number is 3 or more. In addition, as described above, when the carbon number is 3 or more, it may have an alicyclic structure. Typical examples of the alkyl group having a % structure are a cyclopentyl group and a cyclohexyl group. - Similarly, in the formula (1), X of two 3, 4_epoxycyclohexane rings is bonded, or a carbon atom having 1 to 6 carbon atoms or any of the above formulas (ia) to (Μ) The two-valent base represented by the person. Here, the two-base system includes the concepts of aikyiene and alkylidene, and the stretching base may be a direct bond, and may be a branch at a number of 3 or more. Further, when X is a valent group represented by any one of the above formulas (la) to (Id), each of the linking groups, γ2, and γ4 in each formula is a burning group having a carbon number of i to 20, and When the carbon number of the burnt base is 3 or more, it may have an alicyclic knot 324109 11 201245370. The alkanediyl group may of course also be a straight chain, and may also be branched at a carbon number of 3 or more. Further, as described above, when the carbon number is 3 or more, it may have an alicyclic structure. Typical examples of the succinyl group having an alicyclic structure are a cyclopentyl group and a cyclohexyl group. To specifically describe the alicyclic diepoxy compound (A1) represented by the formula (I), the compound of the formula (I) wherein X is a divalent group represented by the above formula (ia) and a is 0 in the formula 3, 4-epoxycyclohexyl decyl alcohol (alkyl groups with carbon number i to 6 can be bonded to the cyclohexane ring) and 3, 4-epoxycyclohexane carboxylic acid (carbon number i to 6) The base can be bonded to the acetate of the bad burnt ring. The specific example is, for example, 3, 4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylic acid [in the formula (1) (only X is represented by the formula (la) of a =0 In the valence group, a compound of RkRkH], 3, 4-epoxy-6-methylcyclohexanecarboxylic acid 3, 4-epoxy-6-methylcyclohexyl decyl ester [in the same X as above) In the formula (丨), ri=6_methyl, R2=6-methyl compound], 3,4-epoxy-1-indolylcyclohexanecarboxylic acid 3,4-epoxy-1-methyl Cyclohexylmethyl ester [in the formula having the same X as above, R1 = methyl group, R2 = 1-methyl compound], 3, 4-epoxy-3-methylcyclohexanecarboxylic acid 3, 4- Epoxy-3-methylcyclohexyldecyl ester [in the formula (I) having the same X as described above, R = 3-methyl, R2 = 3-mercapto compound] and the like. In the formula (I), X is a compound of the valent group represented by the formula (lb), which is a glycerol and a 3, 4-epoxycyclohexanecarboxylic acid (the alkyl group having 1 to 6 carbon atoms may be bonded to An ester of the cyclohexane ring). In the formula (I), X is a divalent group compound represented by the formula (Ic): an aliphatic dicarboxylic acid and 3,4-epoxycyclohexylmethanol (the alkyl group having 1 to 6 carbon atoms may be bonded thereto) Ester of cyclohexane ring). Further, in the formula (I), X is a compound of a divalent group represented by the formula (Id), which is a 3,4-epoxycyclohexylmethanol (the alkyl group having 1 to 6 carbon atoms may be bonded to the cyclohexane ring). 324109 12 201245370 ethers (b=〇), or alkanediols or polyalkylene glycols and 3,4-epoxycyclohexylmethanol (alkyl groups of 1 to 6 carbon atoms may be bonded to Ether ether of cyclohexane ring) (b> 〇). In the above formula (η) representing the diepoxypropyl compound (A2), z is a branched alkyl group having a carbon number of 3 to 8, or a valent group represented by the formula 1. Here, -Z1- is -〇-, -CO-〇- or -〇~c〇__ ; one of m and n is an integer of 1 or more, and the other is an integer of 2 or more, and the two are 8 The following 'and, and one of CnH2n is a branched divalent saturated hydrocarbon group. The compound of the formula (Π) wherein z is a branched alkyl group is a di-epoxypropyl ether of a branched diol, and specific examples thereof include propylene glycol diepoxypropyl ether and 13-I diol diepoxypropyl ether. 1,2-butanediol diepoxypropyl ether, neopentyl glycol monoepoxypropyl ether, 3-mercapto-1,5-pentanediol diepoxypropyl ether, 2-mercapto~ Octanediol diepoxypropyl mystery, 1,4~ ring burned diterpene alcohol, etc. a further, a compound of the formula (11) wherein z is a valent group represented by the above formula, wherein Z is a branched alkyl group and the cC bond of the alkyl group is -〇~, ~C0-0- or -0-C0 - The situation interrupted. In the above formula (III) representing a monofunctional epoxy compound, R3 is an alkyl group having 1 to 5 carbon atoms. The alkyl group may of course be a linear chain, and may have 77 carbon atoms or more. The alkyl group is preferably a carbon number, and is, for example, a carbon number of 6 or more, more preferably a carbon number of 6 to 1 Å. Among them, a branched alkyl group is preferred. A typical example of the monofunctional epoxy compound represented by the formula (π I) is, for example, a 2-ethylhexyl epoxypropyl scale. The amount of the alicyclic diepoxy compound (4) in the photocationic curable component (1) is from 30 to 324109 13 201245370 85 wt% based on the total amount of the photocationically curable filament (4). The amount is preferably from 40 to 80% by weight, more preferably from 6 to 75% by weight. When the amount of the alicyclic dicyclic oxidized person (A1) in the photocationic curable component (A) is too small, the hardening will be insufficient and the adhesion between the polarizer/protective film will be lowered. On the other hand, when the amount is too large, the amount of the diepoxy propyl compound (A2) and the monofunctional epoxy compound (A3) described below will be relatively small, and it is difficult to achieve the photocurability of the present invention. The low viscosity of the subsequent agent. Further, in the photocationic curable component (A), the amount of the diepoxypropyl compound (A2) having a branched structure at the linking group is from 1 to 69% by weight. The amount is preferably from 5 to 50% by weight, more preferably from 5 to 30% by weight. In the photo-cationic hardening component (A), if the amount of the diepoxypropyl compound (A2) is more than 69% by weight, the curing is insufficient and the adhesion between the polarizer/protective film is lowered. Further, in the photocationic curable component (A), the amount of the monofunctional epoxy compound (A3) is from 1 to 69% by weight. /. . The amount is preferably from 2 to 50% by weight, more preferably from 2 to 15% by weight. When the amount of the monofunctional epoxy compound (A3) in the photocationic curable component (A) is more than 69% by weight, the curing is insufficient and the polarizer/preservation (4) force is lowered. ^ The photocationic curable component (A) constituting the photocurable adhesive contains the above-described alicyclic diepoxy compound (A1) in the ratio described above, and the diepoxypropyl group having a branched structure at the linking group. Compound (A2) and mono s-oxime epoxy compound (A3). In order to more effectively achieve the low viscosity of the photocurable adhesive before curing, and to improve the adhesion between the polarizer and the protective film by the cured product, it is preferred to use a photocurable adhesive as a whole. The total amount of the diepoxy propyl compound (A2) and the monofunctional epoxy compound (A3) is 25% by weight or more. 324109 14 201245370 An alicyclic diepoxide compound (A1), a diepoxypropyl compound (10) having a branched structure at a linking group, and a monofunctional epoxy compound (10) in the above-mentioned (4), photocurable Component (A) may contain other cationically polymerizable compounds. (Photocationic polymerization initiator) In the present invention, since the photocationic curable component is cured by cationic polymerization by irradiation with an active energy ray to form an adhesive layer, photocurability is followed by A photocationic polymerization initiator (8) is blended. The photocationic polymerization initiator is a polymerization reactor which initiates the photocationic hardening component (A) by irradiation with an active energy ray such as visible light, ultraviolet light, X-ray or electron beam to generate a cationic species or a Lewis acid. . The ionic polymerization initiator is catalyzed by light by light, and it is excellent in storage stability and workability even when it is mixed into the photocationic curable component (A). Examples of the compound which produces a cationic species or a Lewis acid by irradiation of an active energy ray include, for example, a diaz〇nium salt, an iodonium salt, and an aromatic compound.锍 salt (suif〇ni (10) salt) special record] salt (onium salt); iron-propane two return complex and so on. Examples of the aromatic diazonium salt include the following compounds: hexafluoroanthozoate benzene diazonium salt, hexafluoroantimonic acid benzene diazonium salt, and hexafluoroboric acid benzene diazonium salt. The aromatic sulfonium salt may, for example, be exemplified by the following compounds: diphenylphosphonium tetrakis(pentafluorophenyl)borate, diphenylphosphonium hexafluorophosphate, 324109 15 201245370 hexafluoroantimonic acid diphenylphosphonium salt, hexafluorophosphate (4-nonylphenyl) phosphonium salt and the like. Examples of the aromatic onium salt include the following compounds: triphenylsulfonium hexafluorophosphate, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium tetrakis(pentafluorophenyl)borate, and bishexafluorophosphate 4, 4 '-bis[diphenylsulfoniojdiphenyl sulfide bishexafluorophosphate, bishexafluoroantimonic acid 4,4'-bis[di(stone-hydroxyethoxy)phenyl)疏基]diphenyl sulfide, bishexafluorophosphate 4,4'-bis[di(y3_hydroxyethoxy)phenylidene]diphenyl sulfide, hexafluoroantimonic acid 7-[two (pair 4-(di-p-toluylsulfonio)-2-isopropylthioxanthone hexafluoroantimonate), tetrakis(pentafluorophenyl)boronic acid 7-[two ( p-Indolyl) fluorenyl]-2-isopropyl α-ton _, 4-phenylcarbonyl-4'-diphenylfluorenyl-diphenyl sulfide, hexafluoroantimonic acid 4 -(p-tert-butylphenylcarbonyl)-4'-diphenylindenyl-diphenyl sulfide, tetrakis(pentafluorophenyl)borate 4-(p-tert-butylphenylcarbonyl)_4,- Bis(p-tolylmethyl sulfenyl) sulfhydryl-diphenyl sulfide and the like. The iron-propadiene complex compound may, for example, be exemplified by the following compounds: 324109 16 201245370 Hexafluorocyclopentanyl-cyclopentadienyl iron (π), cumene-cyclopentadienyl hexafluorophosphate Iron (II), xylene-cyclopentadienyl iron (II) tris(trifluoromethylsulfonyl)methanate, etc. The initiators may be used singly or in combination of two or more. In particular, the aromatic salt-salt type has ultraviolet absorbing property in the wavelength range of around 3 〇〇 nm, and therefore it is suitable for use because it can provide a cured product which is excellent in curability and has good mechanical strength and adhesion strength. The blending amount of the photo-cationic polymerization initiator (B) is from 1 to 1 part by weight based on 1 part by weight of the total of the photocationic curable component (A). By blending 1 part by weight or more of the photocationic polymerization initiator for 1 part by weight of the photocationic curable component (A), the photocationic curable component (A) can be sufficiently cured to impart high density to the obtained polarizing plate. Mechanical strength and strength. On the other hand, if the amount is too large, the ionic substance in the hardened material increases, so that the hygroscopicity of the cured product may be improved and the durability of the polarizing plate may be lowered, and therefore, per 100 parts by weight of the photocationic hardening component In the above, the amount of the photocationic poly η initiator (B) is 10 parts by weight or less. The blending amount of the photocationic polymerization initiator (8) is preferably 2 parts by weight or more and 6 parts by weight or less per 1 part by weight of the photo-cationic hardening component (?). (Other recordings which can be incorporated in the practice and subsequent shots) In the photocurable adhesive of the present invention, in addition to the above-mentioned photocationic curable component (Α) containing an epoxidized σ substance and a photocationic polymerization initiator (8) 324109 17 In addition to 201245370, other components generally known to be blended in a photocurable resin or an adhesive may be contained. Suitable examples of the other components include photosensitizers and photosensitizers. The photosensitizer exhibits a maximum absorption at a wavelength longer than the maximum absorption wavelength shown by the photocationic polymerization initiator (B), which is a compound which promotes the polymerization initiation reaction of the photocationic polymerization initiator (B). Further, the photosensitizer is a compound which further promotes the action of the photosensitizer. The photosensitizer is preferably a compounding photosensitive auxiliary agent depending on the type of the protective film. The photosensitizer is preferably a compound which exhibits maximum absorption at a wavelength longer than 380 nm. The photocationic polymerization initiator (B) exhibits maximum absorption at a wavelength of around 300 nm or shorter, and induces light of the nearby wavelength to generate a cationic species or a Lewis acid to initiate a photocationic hardening component (A). Cationic polymerization, but if the above photosensitizer is blended, it will also induce longer wavelengths, especially for wavelengths longer than 380 nm. The photosensitizer is advantageous in the use of an onion compound. Specific examples of the onion-based photosensitizer include the following compounds: M0-dimethoxy onion, 9, 10-diethoxy onion, M0-dipropoxy onion, 9,1 〇 diisopropoxy onion , 9, 10-dibutoxy onion, 9,10-dipentyloxy onion, 9,10-dihexyloxy onion, 9,1 〇-bis(2-methoxyethoxy) onion, 9 , 10-bis(2-ethoxyethoxy) onion, 324109 18 201245370 • 9, 10-bis(2-butoxyethoxy) onion, 9, 10-bis(3-butoxypropoxy) Onion, 2-methyl- or 2-ethyl-9, ίο-dimethoxy onion, 2-mercapto- or 2-ethyl-9, 1Q_diethoxy, 2-methyl - or 2-ethyl-9,10-dipropoxy onion, 2-methyl- or 2-ethyl-9,10-diisopropoxy onion, 2-methyl- or 2-ethyl~ 9, 10-dibutoxy onion, 2-mercapto- or 2-ethyl-9,10-dipentyloxy onion, 2-methyl- or 2-ethyl-9, 10-dihexyloxy Onions and so on. " If the photosensitizer is blended in the photocurable adhesive, the hardenability of the adhesive is improved in the case of tb when the photosensitizer is not pushed. With respect to 100 parts by weight of the cerium cation hardening component (A), if the photosensitizer is added, the weight is more than T, the effect will be exhibited. If the amount of the photosensitizer is increased, precipitation will occur during storage at a low temperature. In the case of the photocationic curable component (A), the amount is preferably 2 or less by weight. From the viewpoint of maintaining the Neutrai gray of the polarizing plate, it is advantageous to keep the bonding amount of the photosensitizer to be less in the range in which the adhesion between the polarizing member and the protective film is kept to a moderate extent. 5重量份范围内。 For example, with respect to 100 parts by weight of the photo-cationic hardening component (A), the amount of the photosensitizer is set to 0. 1 to 0. 5 parts by weight 'more preferably in the range of 〇. 1 to 〇. 3 parts by weight. Next, the photosensitizer will be explained. Although there are various types of photosensitizers, it is advantageous to use naphthalene compounds. Specific examples of the naphthalene-based photosensitizer include the following compounds: 4-decyloxy-1-naphthol, 324109 19 201245370 4-ethoxy-1-naphthol, 4-propoxy-1-naphthol, 4_ Butoxy-1-caxene, 4-hexyloxy-1-naphthol, 1,4-dimethoxyoxynaphthalene, ethoxylated 4-methoxynaphthalene, 1,4-diethoxy Naphthyl, 1,4-dipropoxynaphthalene, 1,4-dibutoxynaphthalene, and the like. When a naphthalene-based photosensitive auxiliary agent is blended in the photocurable adhesive, the hardenability of the adhesive is improved as compared with the case where the naphthalene-based photosensitive auxiliary agent is not blended. This effect is exhibited by adding 0.1 part by weight or more of the naphthalene-based photosensitive auxiliary to 100 parts by weight of the photocationic curable component (A). On the other hand, if the amount of the photosensitive agent added is increased, the problem of precipitation or the like may occur during storage at a low temperature. Therefore, the amount is preferably 100 parts by weight based on the photocationic curable component (A). It is 5 parts by weight or less, more preferably 3 parts by weight or less. (The physical properties of the photocurable adhesive) The photocurable adhesive described above is a method of producing a polarizing plate by laminating a protective film on a polarizer comprising a polyvinyl alcohol resin film as described above. At this time, if the adhesive dissolves the protective film, as described above, bubble defects are generated in the polarizing plate due to the dissolution. In the present invention, a photocurable adhesive (A) containing a specific three kinds of compounds described above in a prepreg ratio is used, and in particular, a branching structure is used (typically, A compound in which a linking group is a branching base) 324109 20 201245370 As a di-epoxypropyl compound (A2)', it is an adhesive which is difficult to dissolve and protect. That is, when the protective film constituting the polarizing plate is at 23 tTg and is mainly used in the adhesive for 2 days, the weight of the protective film is reduced to 3 〇 by weight. Here, the weight of the protective film when immersed in the adhesive is The reduction is obtained in the following manner. Namely, the transparent resin film constituting the protective film is first cut to an appropriate size, and the weight is obtained. Next, the cut film was immersed in a photocurable adhesive prepared in a liquid state and maintained at a temperature of 23 ° C, and left for 2 days, and then taken out, and the adhesive adhering to the surface was wiped off and then obtained. Get the weight. Then, the weight reduction after the impregnation is determined according to the following formula: 重量 Weight reduction (%) = (1 - film weight after impregnation / film weight before impregnation)
xlOO 此外，在上述偏光件及保護膜中至少一者之貼合面塗 佈該接著劑後，經由該接著劑層而將兩者疊合，並使接著 劑硬化。然後，為了提升對於偏光件及/或保護膜之塗佈適 性’该接著劑之黏度係以較低為佳。本發明中，係藉由以 預定比例摻配以上所說明之特定3種類之化合物作為光陽 離子硬化性成份（A)，而使光硬化性接著劑之黏度變低，並 改善塗佈適性。具體來說’可使該光硬化性接著劑在25<t 之黏度為lOOmPa · sec以下。 [偏光板] 本發明中，係在包含聚乙烯醇系樹脂薄膜之偏光件.之 至少一面上，經由以上說明之光硬化性接著劑而貼合包含 透明樹脂之保護膜’並使該光硬化性接著劑硬化而製成偏 324109 21 201245370 將發，巾，*上述般可提高屬於光硬化性接著劑之 之間的㈣u 提〶偏光件與保護膜 ’者性。因此，可使偏光件與保護膜之間之18〇产 剝離試驗之接著強度成為請/25_以上。在此，⑽/ 剝離試驗係以ns κ 6854_2: 1999「接著劑—剝離接著= 度试驗方法〜第2部：18G度剝離」為基準而進行。 00以下說明構成本發明偏光板之偏光件及保護膜，並簡 單說明偏光板之製造方法。 (偏光件） Λ偏光件係由吸附配向有二色性色素之聚乙烯醇系樹脂 薄膜所構成。構成偏光件之聚乙烯醇系樹脂係藉由將聚醋 酸乙稀醋系樹脂進行皂化（saponification)而獲得。醋酸 乙烯酯系樹脂除了可為屬於醋酸乙烯酯之均聚物的聚醋酸 乙烯酯以外，也可為醋酸乙烯酯及可與其共聚合之其他單 體的共聚物。與醋酸乙烯酯共聚合之其他單體，例如可列 舉如不飽和羧酸類、烯烴類、乙烯醚類、不飽和磺酸類等。 聚乙烯醇系樹脂之皂化度通常為85至100莫耳％，較佳為 98至100莫耳％之範圍。聚乙烯醇系樹脂可再經改質，例 如也可使用經醛類改質之聚乙烯縮甲醛（P〇lyVinyl f〇rmal) 及聚乙烯縮乙醛（polyvinyl acetal)等。聚乙烯醇系樹脂 之聚合度通常為1, 000至10, 000，較佳為1，500至5, 000 之範圍。 偏光件係歷經下述步驟而製造：將如此之聚乙烯醇系 樹脂薄膜予以單軸延伸之步驟；以二色性色素將聚乙烯醇 324109 22 201245370 系樹脂薄祺染色， 有二色性色素之聚 步驟。 並使該二色性色素吸附之步驟；將吸附 乙烯醇系樹脂薄膜以償水溶液處理之 性色素trc色性色素之染色前進行，也可與二色 在二色性2 Γ"行，也可在二色性色素之染色後進行。 賴處理前==行單軸延伸時’該單軸延伸可在 =在該^^階段中進行單—^單轴t亦 軸延伸。g °之親間於早軸延伸，也可使用熱輥而於單 =二可為在大氣中進行延伸之乾式延伸，也可 伸件率、雨呈膨潤之狀態下進行延伸之濕式延伸。延 评借羊通㊉為4至8倍左右。 若欲將聚乙稀醇系樹脂薄膜以二色性色素染色，則可 =如將聚乙稀醇系樹脂薄膜浸潰於含有二色性色素之水溶 文。：體來說，二色性色素係使用碘或二色性有機染料。 當=色性色素係使用碘時，通常採用在含有碘及碘化 卸=水溶液中浸潰聚乙烯料、樹脂薄膜並染色之方法。該 合液中，相對於每100重量份水，蛾之含量通常為〇. 01 =1 5重置份左右，而相對於每1〇〇重量份水，碘化鉀之 3篁通常為〇·5至1Q重量份左右。該水溶液之溫度通常為 至40 C左右，此外，在該水溶液中之浸潰時間（染色時 間）通常為30至300秒左右。 ^另方面，當二色性色素係使用二色性有機染料時， 通吊採用在含有水溶性二色性有機染料之水溶液中浸潰聚 324109 23 201245370 乙烯醇系樹脂薄膜並染色之方法。該水溶液中，相對於每 100重量份水，二色性有機染料之含量通常為lxl0-3至 Ιχ10_2重量份左右。該水溶液亦可含有硫酸鈉等無機鹽。 該水溶液之溫度通常為20至80°C左右，此外，在該水溶 液中之浸潰時間（染色時間）通常為30至300秒左右。 在二色性色素染色後之硼酸處理，係藉由將經染色之 聚乙烯醇系樹脂薄膜浸潰於硼酸水溶液而進行。在领酸水 溶液中，相對於每100重量份水，硼酸之含量通常為2至 15重量份左右’較佳為5至12重量份左右。當二色性色 素係使用碘時，該硼酸水溶液較佳為含有碘化鉀。硼酸水 溶液中，相對於每100重量份水，碘化鉀之含量通常為^ 至20重量份左右，較佳為5至15重量份。在該刪六 二之浸潰時間通常為100至u〇〇秒左右，較佳為15: 左右’更佳為至侧秒左右。魏水溶液之 ，皿又通书為5(TC以上，較佳為5〇至航。 ic、丰虚^^理後之聚乙稀醇系樹脂薄膜通常經水洗處理。 ;二!、藉由例如將經硼酸處理之聚乙烯醇系樹脂薄膜 水洗處理中之水的施乾燥處理而得到偏光件。 常為2至"為5至腕左右，浸潰時間通 風乾燥機C右。之後所進行之乾燥處理通常使用熱 至l〇〇、eC 5 ΓΓ夕線加熱器而進行。乾燥溫度通常為40 :C。此外，乾燥處理之時間通常為12〇至_秒左 如此所得之包含聚乙_系樹脂薄膜之偏光件的厚 324109 24 201245370 • 度可為l〇至50/zm左右。 (保護臈） 在以上說明之包含聚乙烯醇系樹脂薄膜之偏光件上，經 由先前說明之光硬化性接著劑而貼合保護膜，並使光硬化 性接著劑硬化，而製成偏光板。保護膜可由下述者所構成： 以習知作為偏光板之保護膜而最廣泛使用之三醋酸纖維素 為首的醋酸纖維素系樹脂薄膜、或透濕度較三醋酸纖維素 低之樹脂薄膜。三醋酸纖維素之透濕度約為4〇〇g/m2/24hr 左右。 在一較佳形態十，在偏光件之至少一面上所貼合的保 護膜’是由醋酸纖維素系樹脂所構成。特別是在偏光件之 一面上所貼合之保護膜係亦可由摻配紫外線吸收劑之醋酸 纖維素系樹脂所構成。在另一較佳的形態中，在偏光件之 至少一面上所貼合之保護膜，係由透濕度較三醋酸纖維素 低之樹脂薄膜，例如透濕度為300g/m2/24hr以下的樹脂薄 膜所構成。構成此等透濕度低之樹脂薄膜的樹脂可列舉 如：非晶性聚烯烴系樹脂、聚酯系樹脂、丙烯酸系樹脂、 聚碳酸酯系樹脂、鏈狀聚烯烴系樹脂等。該等中，較佳為 使用非晶性聚烯烴系樹脂、聚酯系樹脂及鏈狀聚烯烴系樹 脂。在另一較佳的形態中，係在偏光件之一面上經由前述 接著劑層而貼合包含醋酸纖維素系樹脂之保護膜，並在偏 光件之另一面上同樣地經由前述接著劑層而貼合包含上述 透濕度低之透明樹脂的保護膜。 醋酸纖維素系樹脂係使纖維素中之至少一部份經基經 324109 25 201245370 醋酸醋化而成之樹脂’也可為一部份經醋酸酯化且一部份 經其他酸進行酯化而成的混合酯類。醋酸纖維素系樹脂之 具體例可列舉如三醋酸纖維素、二醋酸纖維素、醋酸丙酸 纖維素、醋酸丁酸纖維素等。 非曰a性聚婦fe系樹脂係具有如降莰烯或四環十二烯 (別名二曱橋八氫萘（dimethanooctahydronaphthalene)) 或是於該等鍵結有取代基之化合物等環狀烯烴之聚合單元 的聚合物’也可為使環狀烯烴與鏈狀烯烴及/或芳香族乙烯 化合物共聚合而成之共聚物。當為環狀烯烴之均聚物或是 2種以上之％狀烯之共聚物時，由於會因開環聚合而殘 留雙鍵，故-般係使用對其加氫者而作為非晶性聚稀煙系 樹脂。其中，以熱可塑性降茨烯系樹脂為具代表性者。 聚酯系樹脂係藉由二元酸與二元醇之縮聚 (condensation polymerization)而獲得之聚合物，以聚對 苯二甲酸乙二酯為具代表性者。丙烯酸系樹脂係以甲基丙 稀酸甲醋為主要單體之聚合物，除了可為甲基丙稀酸甲醋 之均聚物以外，也可為甲基丙稀酸甲醋與丙婦酸甲醋等丙 稀酸醋或芳香族乙婦化合物等之共聚物。聚碳酸酉旨系樹脂 係在主鏈具有碳酸g旨鍵，以由_ a 與二氣化幾（phosgene)縮聚而獲得者為具代表性者。鍵狀 聚烯烴系樹脂係以如乙稀或丙烯等鏈狀稀煙為 聚合物’可為均聚物或共聚物。其中，以丙歸之均聚物： 或在丙烯中共聚有少量乙烯之共聚物為具代表性者。 如此之保護膜，可在與貼合於偏光件的面相反側的面 324109 26 201245370 上具有如硬塗層、抗反射層、防眩層或抗靜電層等各種表 面處理層。包括形成如此之表面處理層之情形，保護膜之 厚度可為5至15〇Mm左右。該厚度較佳為1〇从^以上，又 較佳為l20#m以下，更佳為100/zm以下。 (偏光板之製造方法） 一在偏光板之製造中，係在偏光件與保護膜之貼合面之 或兩方开^/成以上说明之光硬化性接著劑之塗佈層，並 經由該塗佈層㈣偏光件與紐麟合，且將如此形成之 未硬化的光魏_著叙㈣層藉㈣料性能量線而 硬化，並將保護咖定於偏光件上。光硬化性接著劑之塗 佈層可形成於偏光件之貼合面，也可形成於保護膜之貼合 面。塗佈層之形成可利用例如刮刀（d〇ct〇r blade)、線棒 (wire bar)、模具塗佈機（die c〇ater)、返點塗佈機 coater)、凹版塗佈機（gravurec〇ater)等各種塗佈方式。 此外’亦可採㈣偏光件與保賴連續地供給且使兩者之 貼合面成為内侧，並於其間流延接著劑之方式。各塗佈方 式有各自適合之黏度範圍，故使聽劑進行減調整也是 可用的技術。為此而用之溶劑係使用不會使偏光件之光學 性能降低並可良好地溶解光硬化性接著劑者，其種類並無 特別限定。例如可使用以甲苯為代表之煙類、以贈酸乙醋 為代表之酯類等有機溶劑。接著劑層之厚度通常為2_ 以下，較佳為以下，更佳為以下。若接著劑層 過厚，則接著劑之反應速率會降低，偏光板之财濕熱性會 有劣化之傾向。 324109 27 201245370 將偏光件與保護膜予以接著時，可在形成接著劑之塗 佈層刖，對兩者之貼合面的一方或兩方實施如電暈放電處 理、電漿處理、火炎處理、底漆（primer)處理或錨塗（anch〇r coating)處理等易接著處理。 用以對光硬化性接著劑之塗佈層照射活性能量線的光 源，只要是會產生紫外線、電子線、χ線等者即可。特別 適合使用在波長40〇nm以下具有發光分佈者，例如低壓水 銀燈、中壓水銀燈、高壓水銀燈、超高壓水銀燈、化學燈 (chemical lamp)、黑光燈（black iight lamp)、微波激發 水銀燈、金>1 i素燈等。對於光硬化性接著劑之活性能量 線照射強度係依目的之組成物而決定，並無特別限定，但 較佳係使對於光陽離子聚合起始狀雜化為有效之波長 領，的照㈣度成為（M至議mW/em、若對於光硬化性 接著劑之光照射強度過小，則反應時間會過長，另一方面， 若該光照㈣度過大，_燈所發射之熱及光硬化性接著 劑聚合時的發熱’而可能產生光硬化性及 =之劣化。躲級化性接著狀絲㈣間係== 化之組成物不同而控制，依然無特職定，但較佳係設定 成使照射強度與闕時間之乘積所㈣ …。若對於光硬化性接著劑之累積光量過I， 自光陽離子聚合起始劑之活性種的產生不足，可能使 所侍接著劑層之硬化不足，另一$ , 为方面，若該累積光量過大， 則照射時間變非常長，不利於提升生産性。 在偏光件的兩面貼合保護膜時，可從任一保護膜侧進 324109 28 201245370 ::收劑照射J但例如當-邊的保護膜含有紫外線 的保護膜不含有紫外線吸收劑時，較佳係 ==線吸收劑之保護膜側照射活性能量線，此係 因可有效湘照射之活性能量線並提高硬化速度。 [積層光學構件] 光二偏:板以外之具有光學機能的 先予構件。典型的方式係在偏光板之保 劑或黏著劑而積層貼附光學層以製成積層 ,卜三例如也可在偏光件之一面上依照本發明 左一"?性接著劑㈣合保護膜，並在偏光件之另一面 上、左由接著劑或黏著劑而積層貼附光學層。在後者之情形 :’用以貼附偏光件與光學層之接著縣使用本發明所規 疋之光更化n接著劑’則該光學層同時也可作為本發明所 規定之保護膜。 爲光板上積層之光學層的例子，可列舉如相對於配 置於液晶盒（cell)背面侧的偏光板，在該偏光板之與面對 液aa皿之侧相反之側上所積層的反射層、半穿透反射層、 光擴散層（optical diffusion layer)、集光板、提升輝度 之薄膜等。此外，也可列舉如相對於配置在液晶盒前面側 之偏光板及配置在液晶盒背面側之偏光板之任一者，在該 偏光板之面對液晶盒之側上所積層的的相位差膜等。 反射層、半穿透反射層或光擴散層，分別是為了製成 反射型偏光板（光學構件）、半穿透反射型偏光板（光學構件） 或擴散型偏光板（光學構件）而設置者。反射型偏光板係用 324109 29 201245370 於使來自視認側之入射光反射而顯示的類型之液晶顯示裝 置，因可省略煮光專光源，故易於使液晶顯示裝置薄型化。 此外，半穿透型偏光板係用於在亮處則作為反射型、在暗 處則以來自背光的光而顯示之類型的液晶顯示裝置。作為 反射型偏光板之光學構件，例如可在偏光件上之保護膜附 設包含鋁等金屬之箔或蒸鍍膜，而形成反射層。作為半穿 透型偏光板之光學構件，可藉由將前述反射層作成半反射 鏡（half mirror)，或將含有珍珠顏料等而顯示光穿透性之 反射板接著於偏光板而形成。另一方面，作為擴射型偏光 板之光學構件，係使用例如對偏光板上之保護膜施行消光 (mat)處理之方法、塗佈含有微粒子之樹脂之方法、將含有 微粒子之薄膜予以接著之方法等各種方法，而在表面形成 微細凹凸結構。 再者’亦可形成作為反射擴散兩用之偏光板而發揮作 用的光學構件，此時，可採用例如在擴散型偏光板之微細凹 凸結構面上設置反映該凹凸結構之反射層等之方法。微細凹 凸結構之反射層係具有可使入射光藉由漫反射（diffused ref lection)而擴散，並防止指向性及眩光’且可抑制明暗 不均等之優點。此外’含有微粒子之樹脂層或薄膜，亦具 有在使入射光及該反射光穿透含有微粒子之層時會擴散且 可抑制明暗不均等之優點。反映表面微細凹凸結構之反射 層，係可藉由例如真空蒸鍍、離子鍍或濺鍍等蒸鍍或電鍍 等方法，在微細凹凸結構表面上直接附設金屬而形成。為 了形成表面微細凹凸結構而摻配之微粒子，係可為例如平 324109 30 201245370 均粒徑0.1至30,之二氧化矽、氧化鋁、氧化鈦、二氧 =鍅、氧化錫、氧化銦、氧化鑛、氧化娣等無機系微粒子， 交聯或非交聯之聚合物等有機系微粒子等。 集光板係以控制光程（optical path)等為目的而使用 者並了形成為稜鏡陣列薄片（prism array sheet)及透鏡 陣列薄片（lens array sheet)或是附設圓點（dot)的薄片 等。 知:升輝度之薄膜係以提升液晶顯示裝置中的輝度為目 的而使用者，其例子可列舉如：積層複數片折射率之異向 性互相不同的薄膜，並以使反射率產生異向性之方式而設 計的反射型偏光分離薄片；將膽固醇狀液晶聚合物 (cholesteric liquid crystal p〇lymer)之配向薄膜或其 配向液晶層支撐於薄膜基材上的圓偏光分離薄片等。 另一方面’作用為光學層之上述相位差膜，係以液晶 盒之相位差之補償等為目的而使用者。該例子可列舉如包 含各種塑膠之延伸薄膜等的雙折射性薄膜、配向固定有盤 狀液晶（d 1 scot i c 1 i qu i d crysta 1)或向列型液晶（nemat i c liquid crystal)之薄膜、在薄膜基材上形成上述液晶層者 等。在薄膜基材上形成液晶層時’薄膜基材較佳為使用三 醋酸纖維素等纖維素系樹脂薄膜。 形成雙折射性薄膜之塑膠，例如可列舉如非晶性聚烯 煙系樹脂、聚碳酸酯系樹脂、丙烯酸系樹脂、聚丙烯等鏈 狀聚烯烴系樹脂、聚乙烯醇、聚苯乙烯、聚芳酯 (polyarylate)、聚醯胺等。延伸薄膜可為以單軸及二軸等 324109 31 201245370 適宜方式處理者。另外，以控制寬頻帶化等光學特性為目 的，可組合使用2片以上之相位差膜。 積層光學構件中’含有相位差膜作為偏光板以外之光 子層者’係因在適用於液晶顯示裝置時可有效地進行光學 保障，故為較適合使用。相位差膜之相位差値（面内及厚1 方向）可依據所適用之液晶盒而選擇最適者。 關於積層光學構件，係可將偏光板、與從上述各種光 學層中依據使用目的而選擇之1層或2層以上予以組合， 而製成2層或3層以上之積層體。此時，形成積 二 件之各種光學層係使用接著劑或黏著劑而與偏光板一體 為此所使用之接著劑或黏著劑只要為可良好地形成接 著劑層或黏著劑層者即無特別限定^從接著作業之簡便性 及防止產生光學變形等之觀點來看，較佳為使用黏著劑（也 稱為感壓接著劑）。黏著劑可使用丙烤酸系聚合物、聚石夕氧 (silicone)系聚合物、聚醋、聚胺曱酸乙酿（1)〇1幫咐·)、 聚越等作為基礎聚合物者。其中，較佳為選擇使用如丙稀 酸系點著劑般光學的透明性優異、保持有適度之濕潤性及 =力、且與基材之接著性亦優異、並具有耐候性及耐熱 在加熱及加祕件下也不會產生独及剥落等剝離 ^題者。丙稀酸系黏著射，係以將下述丙烯酸系共聚物 ^基礎聚合物者為有用：將具有ψ基或乙基或丁基等碳 數為20以下之院基的.（甲基）丙稀酸酿之院醋、與包含（甲 =)丙稀酸或（甲基）两締賴乙酯等之含有宫能基之丙婦 酸系早體’以使玻璃轉移溫度較佳為机以下，更佳為代 324109 32 201245370 以下之條件下掺配’而製成之重量平均分子量為10萬以上 之丙烯睃系共聚物。 對偏光板形成點著劑層，係例如以下述方式而進行. 在甲苯或醋酸乙酯等有機溶媒中溶解或分散黏著劑組Z物 並調製為10至40重量％之溶液，將其直接塗佈在偏光板上 之方式；以及預先在保護薄膜上形成黏著劑層，並將其移 至偏光板上之方式等。黏著劑層之厚度係依據其接著力等 而決定’但較適當為在1至50/zm左右之範圍。 此外，在黏著劑層中，可視需要而摻配：玻璃纖維或 玻璃珠、樹脂珠、包含金屬粉或該其他無機粉末等之充填 劑、顏料或著色劑、抗氧化劑、紫外線吸收劑等。紫外線 吸收劑有柳酸S旨系化合物及二苯基酮（benzophenone)系化 合物、苯並***（benzotriazole)系化合物、氰基丙烯酸酯 (cyanoacrylate)系化合物、鎳錯鹽系化合物等。 積層光學構件可配置在液晶盒之單側或兩侧。液晶盒 可使用任意者，可使用例如以薄膜電晶體型為代表之主動 矩陣驅動型、以超级扭曲向列型（SUper twisted nematic) 為代表之單純矩陣驅動型等各種液晶盒而形成液晶顯示裝 置。積層光學構件與液晶盒之接著通常使用與上述相同之 黏著劑。 (實施例） 以下表示實施例並更具體說明本發明，但本發明並不 限定於該等實施例。例中’表示含量或使用量之％及份，在 未特別註記下即為重量基準。此外，以下例子所使用之光 324109 33 201245370 陽離子硬化性成份及光陽離子聚合起始劑係如下所述，以 下分別以記號表示。 (A) 光陽離子硬化性成份 (al)3, 4-環氧環己烧鼓酸3’4~環氧環己基曱酯[前述 式（I)中，R1=R2=H、X=-C00CH2-之化合物]. (a21)新戊二醇二環氧丙基醚[前述式（π)中， Z = -CH2C(CH3)2CH2-之化合物]; (a22)l，4-丁二醇二環氧丙基醚[前述式（⑴中， Z = -(CH2)4-之化合物](比較用）； (a3)2-乙基己基環氧丙基醚[前述式（ιπ)中， R3=CH3(CH2)3-CH(CH2CH3)-CH2-之化合物]。 (B) 光陽離子聚合起始劑（表中略稱為「起始劑」） (b 1)六氟碟酸三芳基疏鹽。 [實施例1至4及比較例1至3] (1) 調製光硬化性接著劑 將上述光陽離子硬化性成份及光陽離子聚合起始劑，以 表1所示掺酉己比例（單位為份）混合後，予以脫泡而調製光 硬化性接著劑液。另外，摻配50%碳酸丙烯酯（pr〇pylene carbonate)溶液以作為光陽離子聚合起始劑（Μ)，在表i 中表示其固形份量。 (2) 接著劑液之在25°C中之黏度測定 對於上述調製之各接著劑液，使用八的⑽paar公司製 之旋轉式黏彈性測定裝置“Physica MCR 3〇1，，測定溫度 25C下之黏度。結果表示於表1。 324109 34 201245370 , (3)保護膜之溶解性 準備包含醋酸纖維素系樹脂之厚度以m之相位差膜 [商品名"N-TAV KC4FR-1" ’ Konica Minolta Opto 股份公 司製]。該相位差膜係貼合在聚乙烯醇系偏光件上以作為兼 具有光學補償機能之保護膜’而用於偏光板之製造。將該 相位差膜裁切為10mmx40丽之大小後，在23〇C之溫度下於 以上調製之各接著劑液20g中浸潰2天。2天後，取出相 位差膜，以無塵紙BEMC0T擦拭附著於保護膜上之接著劑 液’並測定重量。然後’由浸潰於接著劑液前之薄膜重量 與浸潰後之薄膜重量，依據下式而求出該薄膜之重量減 少，結果表示於表1。 重量減少= 浸潰後之薄膜重量/浸潰前之薄膜重量）Further, after the adhesive is applied to the bonding surface of at least one of the polarizer and the protective film, the adhesive layer is laminated via the adhesive layer to cure the adhesive. Then, in order to improve the coating suitability for the polarizer and/or the protective film, the viscosity of the adhesive is preferably lower. In the present invention, the specific three types of compounds described above are blended as the photo-cation hardening component (A) in a predetermined ratio, whereby the viscosity of the photocurable adhesive is lowered, and the coating suitability is improved. Specifically, the photocurable adhesive may have a viscosity at 25 < t of 100 mPa · sec or less. [Polarizing Plate] In the present invention, a protective film containing a transparent resin is bonded to at least one surface of a polarizing material including a polyvinyl alcohol-based resin film via the photocurable adhesive described above, and the light is cured. The adhesive is hardened to form a partial 324109. 21 201245370 The hair, the towel, and the like can be used to improve the (four) u-lifting polarizer and the protective film between the photocurable adhesives. Therefore, the bonding strength of the 18-inch peeling test between the polarizer and the protective film can be made /25_ or more. Here, the (10)/peeling test was carried out based on ns κ 6854_2: 1999 "adhesive-peeling subsequent = degree test method - second part: 18G degree peeling". The polarizer and the protective film constituting the polarizing plate of the present invention will be described below, and a method of manufacturing the polarizing plate will be briefly described. (Polarizer) The iridium polarizer is composed of a polyvinyl alcohol-based resin film which is adsorbed and has a dichroic dye. The polyvinyl alcohol-based resin constituting the polarizing material is obtained by saponification of a polyethylene vinegar-based resin. The vinyl acetate resin may be a polyvinyl acetate which is a homopolymer of vinyl acetate, or a copolymer of vinyl acetate and other monomers copolymerizable therewith. The other monomer copolymerized with vinyl acetate may, for example, be an unsaturated carboxylic acid, an olefin, a vinyl ether or an unsaturated sulfonic acid. The degree of saponification of the polyvinyl alcohol-based resin is usually from 85 to 100 mol%, preferably from 98 to 100 mol%. The polyvinyl alcohol-based resin may be further modified, and for example, acetal-modified polyvinyl formal (P〇lyVinyl f〇rmal) and polyvinyl acetal (polyvinyl acetal) may be used. The degree of polymerization of the polyvinyl alcohol-based resin is usually in the range of 1,000 to 10,000, preferably 1,500 to 5,000. The polarizing member is produced by the following steps: a step of uniaxially stretching the polyvinyl alcohol-based resin film; dyeing the polyvinyl alcohol 324109 22 201245370 resin with a dichroic dye, and having a dichroic dye Gather steps. a step of adsorbing the dichroic dye; and performing the dyeing of the vinyl alcohol-based resin film to the aqueous dye-treated trc coloring dye before the dyeing, or the dichroism in the dichroic 2 Γ" It is carried out after dyeing of the dichroic dye. Before the treatment === When the line is uniaxially extended, the single-axis extension can be performed in the ^^ stage and the single axis t and the axis are extended. The g ° is extended in the early axis, and the hot roll can also be used, and the single extension can be a dry extension extending in the atmosphere, or a wet extension in which the extension is carried out and the rain is swollen. The evaluation of borrowing sheep is 10 to 8 times. If the polyethylene glycol resin film is to be dyed with a dichroic dye, it is possible to immerse the polyethylene glycol resin film in a water-soluble article containing a dichroic dye. In general, dichroic dyes use iodine or dichroic organic dyes. When iodine is used as the coloring matter, a method of impregnating a polyethylene material, a resin film, and dyeing in an aqueous solution containing iodine and iodine is usually employed. In the liquid mixture, the content of moth is usually 〇. 01 =1 5 parts per 100 parts by weight of water, and the amount of potassium iodide is usually 〇·5 to 1 part by weight of water. 1Q parts by weight or so. The temperature of the aqueous solution is usually about 40 C, and in addition, the impregnation time (dyeing time) in the aqueous solution is usually about 30 to 300 seconds. On the other hand, when a dichroic dye is used as a dichroic dye, a method of immersing a polycyclohexane film of 324109 23 201245370 in an aqueous solution containing a water-soluble dichroic organic dye and dyeing it is used. In the aqueous solution, the content of the dichroic organic dye is usually from about 1 x 10 3 to about 10 2 parts by weight per 100 parts by weight of water. The aqueous solution may also contain an inorganic salt such as sodium sulfate. The temperature of the aqueous solution is usually about 20 to 80 ° C, and in addition, the immersion time (dyeing time) in the aqueous solution is usually about 30 to 300 seconds. The boric acid treatment after the dyeing of the dichroic dye is carried out by dipping the dyed polyvinyl alcohol resin film into an aqueous boric acid solution. In the aqueous acid solution, the content of boric acid is usually about 2 to 15 parts by weight, preferably about 5 to 12 parts by weight, per 100 parts by weight of water. When the dichroic dye is iodine, the aqueous boric acid solution preferably contains potassium iodide. In the aqueous boric acid solution, the content of potassium iodide is usually from about 2 to 20 parts by weight, preferably from 5 to 15 parts by weight, per 100 parts by weight of the water. The immersion time in the hexa-2 is usually about 100 to u sec, preferably 15: about ‘more preferably to about the second. Wei's aqueous solution, the book is also 5 books (TC or above, preferably 5 〇 to voyage. ic, Fengxu ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The water in the water-washing treatment of the boric acid-treated polyvinyl alcohol-based resin film is subjected to a drying treatment to obtain a polarizer. Usually 2 to "5 to about the wrist, and the dipping time ventilation dryer C is right. The drying treatment is usually carried out using a heat to l〇〇, eC 5 ΓΓ 线 line heater. The drying temperature is usually 40: C. In addition, the drying treatment time is usually 12 〇 to _ seconds left so that the resulting poly- _ The thickness of the polarizing member of the resin film is 324109 24 201245370 • The degree may be from about 10 to about 50/zm. (Protection 臈) On the polarizing member including the polyvinyl alcohol-based resin film described above, the photocurability is described above. The protective film is bonded to the protective film, and the photocurable adhesive is cured to form a polarizing plate. The protective film may be composed of the following: cellulose triacetate, which is the most widely used as a protective film for a polarizing plate, is used. Cellulose acetate resin film, Or a resin film having a lower moisture permeability than cellulose triacetate. The moisture permeability of cellulose triacetate is about 4 〇〇g/m 2 /24 hr. In a preferred embodiment 10, it is attached to at least one side of the polarizing member. The protective film 'is composed of a cellulose acetate-based resin. In particular, the protective film to be bonded to one surface of the polarizing member may be composed of a cellulose acetate-based resin to which a UV absorber is blended. In the embodiment, the protective film to be bonded to at least one surface of the polarizer is made of a resin film having a lower moisture permeability than cellulose triacetate, for example, a resin film having a moisture permeability of 300 g/m 2 /24 hr or less. Examples of the resin of the resin film having a low moisture permeability include an amorphous polyolefin resin, a polyester resin, an acrylic resin, a polycarbonate resin, a chain polyolefin resin, and the like. An amorphous polyolefin resin, a polyester resin, and a chain polyolefin resin are used. In another preferred embodiment, the cellulose acetate system is bonded to one surface of the polarizer via the adhesive layer. Resin protection And a protective film containing the transparent resin having a low moisture permeability is bonded to the other surface of the polarizer via the adhesive layer. The cellulose acetate resin causes at least a part of the cellulose to pass through the base 324109. 25 201245370 Acetate-formed resin' can also be a mixed ester which is partially esterified by acetic acid and partially esterified with other acids. Specific examples of cellulose acetate resin can be exemplified by triacetic acid. Cellulose, cellulose diacetate, cellulose acetate propionate, cellulose acetate butyrate, etc. Non-曰a-type poly-feminal resin has such as norbornene or tetracyclododecene (alias bismuth bridge octahydronaphthalene) (dimethanooctahydronaphthalene)) or a polymer of a polymerized unit of a cyclic olefin such as a compound having a substituent bonded thereto may be obtained by copolymerizing a cyclic olefin with a chain olefin and/or an aromatic vinyl compound. Copolymer. When it is a homopolymer of a cyclic olefin or a copolymer of two or more kinds of olefins, since a double bond remains due to ring-opening polymerization, it is generally used as an amorphous polymer for hydrogenation. Thin smoke resin. Among them, thermoplasticity-reducing olefinic resins are representative. The polyester resin is a polymer obtained by condensation polymerization of a dibasic acid and a glycol, and polyethylene terephthalate is representative. The acrylic resin is a polymer containing methyl acetoacetate as a main monomer, and may be methyl methacrylate and propyl ketone in addition to a homopolymer of methyl methacrylate. A copolymer of acetonic acid such as methyl vinegar or an aromatic berry compound. The polycarbonate-based resin is a representative having a carbonic acid-g-bond in the main chain and obtained by polycondensation of _a and phosgene. The key polyolefin resin is a polymer such as a chain fumes such as ethylene or propylene, which may be a homopolymer or a copolymer. Among them, a homopolymer of propylene: or a copolymer of a small amount of ethylene copolymerized in propylene is representative. Such a protective film may have various surface treatment layers such as a hard coat layer, an antireflection layer, an antiglare layer or an antistatic layer on the surface 324109 26 201245370 opposite to the surface to be bonded to the polarizing member. In the case where such a surface treatment layer is formed, the thickness of the protective film may be about 5 to 15 Å Mm. The thickness is preferably from 1 to above, more preferably from 1 to 20 m, still more preferably from 100 to zm. (Manufacturing Method of Polarizing Plate) In the production of a polarizing plate, the coating layer of the photocurable adhesive described above is formed on both the bonding surface of the polarizer and the protective film, and The coating layer (4) polarizer is combined with the nucleus, and the uncured light thus formed is hardened by the (four) material energy line, and the protection is fixed on the polarizer. The coating layer of the photocurable adhesive may be formed on the bonding surface of the polarizing member or may be formed on the bonding surface of the protective film. The coating layer can be formed by, for example, a doctor blade, a wire bar, a die coater, a coater, or a gravure coater. 〇ater) and other coating methods. Further, it is also possible to adopt a method in which (4) the polarizing member and the retaining member are continuously supplied and the bonding surfaces of the two are made inside, and the adhesive is cast therebetween. Each coating method has a suitable viscosity range, so that the adjustment of the hearing agent is also a useful technique. The solvent used for this purpose is not particularly limited as long as the optical performance of the polarizer is not lowered and the photocurable adhesive is well dissolved. For example, an organic solvent such as a tobacco represented by toluene or an ester represented by a glycol acid vinegar can be used. The thickness of the subsequent layer is usually 2 or less, preferably the following, more preferably the following. If the adhesive layer is too thick, the reaction rate of the adhesive will decrease, and the wet heat of the polarizing plate tends to deteriorate. 324109 27 201245370 When the polarizer and the protective film are subsequently adhered, one or both of the bonding surfaces of the two may be subjected to corona discharge treatment, plasma treatment, flame treatment, or the like. A primer treatment or an anchor coating treatment is easily followed. The light source for irradiating the coating layer of the photocurable adhesive with the active energy ray may be any ultraviolet light, electron beam, twisted wire or the like. Particularly suitable for use with a distribution of light below 40 〇 nm, such as low pressure mercury lamp, medium pressure mercury lamp, high pressure mercury lamp, ultra high pressure mercury lamp, chemical lamp, black iight lamp, microwave excited mercury lamp, gold > ; 1 i lamp, etc. The active energy ray irradiation intensity of the photocurable adhesive is determined according to the intended composition, and is not particularly limited, but is preferably a wavelength of (four) degrees which is effective for hybridization of photocationic polymerization initiation. (M to mW/em, if the light intensity of the photocurable adhesive is too small, the reaction time will be too long. On the other hand, if the light (four) degree is too large, the heat and light hardening emitted by the lamp The heat generated during the polymerization of the polymer may cause photocurability and deterioration of the film. The doping property is controlled by the composition of the filaments (4) ==, and there is no special purpose, but it is preferably set to The product of the irradiation intensity and the enthalpy time is (4). If the cumulative amount of light for the photocurable adhesive exceeds 1, the production of the active species from the photo-cationic polymerization initiator is insufficient, and the hardening of the adhesive layer may be insufficient. Another $, for the aspect, if the accumulated amount of light is too large, the irradiation time becomes very long, which is not conducive to improving productivity. When the protective film is attached to both sides of the polarizing member, it can be 324109 from the side of any protective film. Receiving radiation J, for example, when the protective film containing ultraviolet rays does not contain an ultraviolet absorber, it is preferred that the protective film side of the line absorber is irradiated with an active energy ray, which is effective for the active energy line of the illuminating light. Increasing the hardening speed [Laminated optical member] Light-biased: A pre-component having an optical function other than a plate. A typical method is to apply a protective layer or a bonding agent to a polarizing plate to laminate an optical layer to form a laminate. The protective film may also be laminated on one side of the polarizing member according to the left "adhesive adhesive of the present invention, and the optical layer may be laminated on the other side of the polarizing member and left by an adhesive or an adhesive. Case: 'The light source is used to attach the polarizer and the optical layer, and the photoreceptor of the present invention is used to improve the n-adhesive'. The optical layer can also serve as a protective film as defined in the present invention. Examples of the optical layer include, for example, a polarizing plate disposed on the back side of the liquid crystal cell, and a reflective layer and a semi-transparent reflection layer deposited on the opposite side of the polarizing plate from the side facing the liquid aa dish. Layer, light diffusion (optical diffusion layer), a light-collecting sheet, a film for enhancing the brightness, etc., and the polarizing plate disposed on the front side of the liquid crystal cell and the polarizing plate disposed on the back side of the liquid crystal cell, a retardation film or the like which is laminated on the side of the liquid crystal cell. The reflective layer, the semi-transmissive reflective layer or the light diffusing layer are respectively formed into a reflective polarizing plate (optical member) and a transflective type. A polarizing plate (optical member) or a diffusing type polarizing plate (optical member) is provided. The reflective polarizing plate is 324109 29 201245370. A liquid crystal display device of a type that reflects incident light from the viewing side can be omitted. In addition, the semi-transmissive polarizing plate is a liquid crystal display device of a type that is used as a reflective type in bright places and as a light source from a backlight in a dark place. As the optical member of the reflective polarizing plate, for example, a foil containing a metal such as aluminum or a vapor deposited film may be attached to the protective film on the polarizing member to form a reflective layer. The optical member of the transflective polarizing plate can be formed by forming the reflecting layer as a half mirror or by connecting a reflecting plate containing a pearl pigment or the like to exhibit light transmittance to a polarizing plate. On the other hand, as the optical member of the diffusing type polarizing plate, for example, a method of performing matting treatment on a protective film on a polarizing plate, a method of applying a resin containing fine particles, and a film containing fine particles are used. A method such as a method forms a fine uneven structure on the surface. Further, an optical member which functions as a polarizing plate for reflection and diffusion can be formed. In this case, for example, a method of reflecting a reflective layer or the like of the uneven structure on the fine concave and convex structural surface of the diffusing type polarizing plate can be employed. The reflective layer of the fine concave-convex structure has the advantage of allowing the incident light to be diffused by diffuse ref lection, preventing directivity and glare, and suppressing uneven brightness and the like. Further, the resin layer or film containing fine particles has an advantage of diffusing the incident light and the reflected light while penetrating the layer containing the fine particles, and suppressing unevenness in brightness and the like. The reflective layer reflecting the fine uneven structure on the surface can be formed by directly depositing a metal on the surface of the fine uneven structure by vapor deposition or plating such as vacuum deposition, ion plating or sputtering. The fine particles blended to form the surface fine concavo-convex structure may be, for example, flat 324109 30 201245370, an average particle diameter of 0.1 to 30, of cerium oxide, aluminum oxide, titanium oxide, dioxane = antimony, tin oxide, indium oxide, oxidation. Inorganic fine particles such as minerals and cerium oxide, organic fine particles such as crosslinked or non-crosslinked polymers. The light collecting plate is formed by a user to form a prism array sheet, a lens array sheet, or a dot attached with a dot for the purpose of controlling an optical path or the like. . It is known that the film of the brightness is used for the purpose of improving the luminance in the liquid crystal display device, and examples thereof include a film in which the refractive index of the laminated plurality of films is different from each other, and the reflectance is anisotropic. A reflective polarized release sheet designed in the same manner; an alignment film of a cholesteric liquid crystal polymer or a circularly polarized separation sheet or the like which is supported on a film substrate by a liquid crystal layer. On the other hand, the retardation film which functions as an optical layer is intended for the purpose of compensating for the phase difference of the liquid crystal cell. Examples of the examples include a birefringent film comprising a stretched film of various plastics, a film in which a discotic liquid crystal (d 1 scot ic 1 i qu id crysta 1) or a nemat ionic liquid crystal is fixed, The liquid crystal layer or the like is formed on the film substrate. When the liquid crystal layer is formed on the film substrate, the film substrate is preferably a cellulose resin film such as cellulose triacetate. Examples of the plastic forming the birefringent film include a chain polyolefin resin such as an amorphous polyolefin resin, a polycarbonate resin, an acrylic resin, and a polypropylene, polyvinyl alcohol, polystyrene, and poly. Polyarylate, polyamine, and the like. The stretch film can be processed in a suitable manner such as uniaxial and biaxial 324109 31 201245370. Further, for the purpose of controlling optical characteristics such as widening, it is possible to use two or more retardation films in combination. Among the laminated optical members, the "rear retardation film is included as a photonic layer other than the polarizing plate" is more suitable for use because it can be effectively optically protected when applied to a liquid crystal display device. The phase difference 値 (in-plane and thickness 1 direction) of the retardation film can be selected according to the applicable liquid crystal cell. In the laminated optical member, a polarizing plate and one or two or more layers selected from the above various optical layers depending on the purpose of use can be combined to form a laminated body of two or more layers. In this case, the optical layers forming the two sheets are integrally formed with an adhesive or an adhesive, and the adhesive or the adhesive used for the polarizing plate is not particularly special as long as the adhesive layer or the adhesive layer can be formed satisfactorily. It is preferable to use an adhesive (also referred to as a pressure-sensitive adhesive) from the viewpoint of simplicity of handling and prevention of optical distortion. As the adhesive, an acrylic acid polymer, a silicone polymer, a polyester, a polyamine phthalate (1) 〇1 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 、 Among them, it is preferred to use an acrylic-based dot-like agent, which is excellent in transparency, maintains moderate wettability and strength, and is excellent in adhesion to a substrate, and has weather resistance and heat resistance. Under the addition of secrets, there will be no separation and peeling. Acrylic acid-based adhesion is useful for the following acrylic copolymers: a base polymer: a (meth) propyl group having a fluorenyl group or an ethyl group or a butyl group having a carbon number of 20 or less. Dilute sour brewing vinegar, and containing (A = acrylic acid or (meth) two ruthenium ethyl esters, etc., containing uterine energy, such as glycerol acid precursors, so that the glass transition temperature is preferably below the machine More preferably, it is a propylene-based copolymer having a weight average molecular weight of 100,000 or more which is prepared by blending ' under the following conditions 324109 32 201245370. Forming a dot layer on the polarizing plate is carried out, for example, in the following manner: Dissolving or dispersing the adhesive group Z in an organic solvent such as toluene or ethyl acetate and preparing a solution of 10 to 40% by weight, and directly coating the same The manner of laying on the polarizing plate; and the manner of forming an adhesive layer on the protective film in advance and moving it to the polarizing plate. The thickness of the adhesive layer is determined according to its adhesion force or the like, but is suitably in the range of about 1 to 50/zm. Further, in the adhesive layer, it may be blended as needed: glass fiber or glass beads, resin beads, a filler containing a metal powder or the like, a pigment or a coloring agent, an antioxidant, an ultraviolet absorber, or the like. The ultraviolet absorber includes a salicylic acid S-based compound, a benzophenone-based compound, a benzotriazole-based compound, a cyanoacrylate-based compound, and a nickel-salted salt-based compound. The laminated optical member can be disposed on one side or both sides of the liquid crystal cell. Any one of the liquid crystal cells can be used, and a liquid crystal display device can be formed by using, for example, an active matrix drive type represented by a thin film transistor type and a simple matrix drive type represented by a super twisted nematic type (SUper twisted nematic type). . The adhesive of the laminated optical member and the liquid crystal cell is usually the same as described above. (Examples) Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited to the examples. In the examples, '% or part of the content or amount used is a weight basis unless otherwise noted. Further, the light used in the following examples 324109 33 201245370 The cationic hardening component and the photocationic polymerization initiator are as follows, and are indicated by the following symbols, respectively. (A) Photocationic curable component (al) 3, 4-epoxycyclohexyl benzoic acid 3'4~epoxycyclohexyl decyl ester [In the above formula (I), R1 = R2 = H, X = -C00CH2 - a compound]. (a21) neopentyl glycol diepoxypropyl ether [in the above formula (π), Z = -CH2C(CH3)2CH2- compound]; (a22) 1,4-butanediol II Epoxypropyl ether [Compound of the above formula ((1), Z = -(CH2)4-] (comparative); (a3) 2-ethylhexylepoxypropyl ether [in the above formula (ιπ), R3 =CH3(CH2)3-CH(CH2CH3)-CH2-compound] (B) Photocationic polymerization initiator (abbreviated as "starter" in the table) (b 1) hexafluorodisic acid triaryl salt [Examples 1 to 4 and Comparative Examples 1 to 3] (1) The photocurable hardenable component and the photocationic polymerization initiator were prepared by the photocurable adhesive as shown in Table 1. After mixing, defoaming is carried out to prepare a photocurable adhesive liquid. Further, a 50% propylene carbonate solution is blended as a photocationic polymerization initiator (Μ), which is represented in Table i. The solid content of the solution (2) The viscosity of the subsequent solution at 25 ° C for the above modulation For each of the adhesive liquids, a viscosity of 25 C was measured using a rotary viscoelasticity measuring apparatus "Physica MCR 3"1 manufactured by Paar Co., Ltd., and the results are shown in Table 1. 324109 34 201245370, (3) Protective film The solubility preparation includes a retardation film of a cellulose acetate-based resin having a thickness of m [trade name "N-TAV KC4FR-1" 'Konica Minolta Opto Co., Ltd.]. The retardation film is bonded to a polyvinyl alcohol system. The polarizer is used for the production of a polarizing plate as a protective film having an optical compensation function. The retardation film is cut to a size of 10 mm x 40 Å, and then subjected to the above modulation at a temperature of 23 ° C. The solution liquid was immersed in 20 g for 2 days. After 2 days, the retardation film was taken out, and the adhesive liquid adhered to the protective film was wiped with the dust-free paper BEMC0T and the weight was measured. Then, the film weight before being immersed in the adhesive liquid The weight of the film after the impregnation was determined according to the following formula. The results are shown in Table 1. Weight reduction = film weight after impregnation / film weight before impregnation)
xlOOXlOO
[表1] 例No· 先陽離子硬化性成分 起始劑 接著劑液 之濃度 浸潰後之 4¾¾少 (a X) (a 2 1) (a 2 2) (a 3) (b 1) (mPa* sec) (%) 實施例1 7 0 20 — 10 2.2 5 6 5 17 〃 2 7 5 2 0 — 5 2.2 5 8 2 15 « 3 4 0 5 0 — 10 2.2 5 3 1 2 3 ，/ 4 4 0 10 — 5 0 2.2 5 14 5 比較例1 9 0 5 一 5 2.2 5 13 9 5 〃 2 7 5 — 2 0 5 2.2 5 7 8 4 2 II 3 7 0 — 2 0 10 2.2 5 6 1 4 5 如比較例1般在脂環式二環氧化合物（al)中摻配以分 支伸烷基作為連結基之二環氧丙基醚（a21)及單官能環氧 化合物（a3)的3元系接著劑，雖然其對於保護膜之醋酸纖 維素系樹脂薄膜的溶解性小，但因脂環式二環氧化合物（al) 324109 35 201245370 之摻配比例大，故黏度變高，在塗佈於保護膜或偏光件時 之塗佈適性並不充足。另一方面，如比較例2及3般二環 氧丙基化合物（a2)係使用以碳數4之直鏈伸烷基作為連結 基之二環氧丙基醚（a22)時，其對於保護膜之醋酸纖維素系 樹脂薄膜的溶解性大。相對於此，若為含有以分支伸烷基 作為連結基之二環氧丙基醚（a2i)的3元系接著劑，並設為 實施例1至4般之摻配比例，則會成為低黏度且難以溶解 保護膜之光硬化性接著劑。 在聚乙烯醇薄膜上吸附配向有峨的偏光件之一面上， 上由實施例1至4所製作之光硬化性接著劑，而貼合實施 例1至4所^之相位差膜，並在偏光件之另—面上分別 = 劑而貼合厚度8〇"m之三醋酸纖維素薄膜， 之偏:板。特紫外線，則可獲得顯示良好接著力 份中使脂環式 實施例1及2般在光陽離子硬化性成 得高的接著力^氧化合物（al)的量為聊以上時，可獲 【圖式簡單說明】 益 4”、 【主要元件符號說明】 324109 36[Table 1] Example No. cation-hardening component initiator The concentration of the binder fluid after the impregnation is less (a X) (a 2 1) (a 2 2) (a 3) (b 1) (mPa * sec) (%) Example 1 7 0 20 — 10 2.2 5 6 5 17 〃 2 7 5 2 0 — 5 2.2 5 8 2 15 « 3 4 0 5 0 — 10 2.2 5 3 1 2 3 , / 4 4 0 10 — 5 0 2.2 5 14 5 Comparative Example 1 9 0 5 - 5 2.2 5 13 9 5 〃 2 7 5 — 2 0 5 2.2 5 7 8 4 2 II 3 7 0 — 2 0 10 2.2 5 6 1 4 5 A ternary system in which an alicyclic diepoxide (al) is blended with a branched alkyl group as a linking group of diglycidyl ether (a21) and a monofunctional epoxy compound (a3) as in Comparative Example 1. The subsequent agent has a small solubility in the cellulose acetate-based resin film of the protective film, but the viscosity of the alicyclic diepoxide (al) 324109 35 201245370 is large, so the viscosity is high, and it is applied to The coating suitability of the protective film or the polarizing member is not sufficient. On the other hand, when the diepoxypropyl compound (a2) of Comparative Examples 2 and 3 is a diglycidyl ether (a22) having a linear alkylene group having 4 carbon atoms as a linking group, it is protected. The cellulose acetate resin film of the film has a large solubility. On the other hand, in the case of a ternary-based adhesive containing a diglycidyl ether (a2i) having a branched alkyl group as a linking group, the blending ratios of Examples 1 to 4 are low. A photocurable adhesive which is viscous and hard to dissolve the protective film. Adsorbing the photocurable adhesives prepared in Examples 1 to 4 on one side of the polarizing member having the antimony on the polyvinyl alcohol film, and adhering to the retardation film of Examples 1 to 4, and On the other side of the polarizer, the thickness of the coating is 8 〇"m of the cellulose acetate film, the bias: plate. In the case of the ultraviolet ray, it is possible to obtain a good adhesion strength in the case where the amount of the urethane compound (al) which is high in photocationic curability in the alicyclic examples 1 and 2 is obtained. Simple description] Benefit 4", [Main component symbol description] 324109 36