TW201007228A - Composite polarizing plate and liquid crystal display device using the same - Google Patents

Composite polarizing plate and liquid crystal display device using the same Download PDF

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Publication number
TW201007228A
TW201007228A TW98111508A TW98111508A TW201007228A TW 201007228 A TW201007228 A TW 201007228A TW 98111508 A TW98111508 A TW 98111508A TW 98111508 A TW98111508 A TW 98111508A TW 201007228 A TW201007228 A TW 201007228A
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Taiwan
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film
resin
adhesive
polarizing plate
liquid crystal
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TW98111508A
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Chinese (zh)
Inventor
Toshikazu Matsumoto
Ki-Youn Shin
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Sumitomo Chemical Co
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Priority claimed from JP2008099255A external-priority patent/JP2009251284A/en
Priority claimed from JP2008208083A external-priority patent/JP2009271490A/en
Application filed by Sumitomo Chemical Co filed Critical Sumitomo Chemical Co
Publication of TW201007228A publication Critical patent/TW201007228A/en

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Abstract

Disclosed is a composite polarizing plate comprising a polarizing film (101), a transparent protective film (102) arranged on one side of the polarizing film (101) through an adhesive layer (104, 204), and a retardation film (103) made of an olefin resin and arranged on the other side of the polarizing film (101) through a second adhesive layer (105) or a bonding agent layer (205). The retardation film (103) has an in-plane retardation of 150-300 nm and an Nz coefficient of 0.2-0.6. A liquid crystal display device using the composite polarizing plate is also disclosed. The second adhesive layer (105) is a layer of a cured product of an epoxy resin composition containing an epoxy resin which is cured by irradiation of an active energy ray or by heating. The bonding agent layer (205) is composed of a highly elastic bonding agent having a storage modulus at 80 DEG C of not less than 0.1 MPa.

Description

201007228 六、發明說明 【發明所屬之技術領域】 本發明有關一種層合有相位差薄膜之複合偏光板，更 詳言之’係有關於偏光薄膜之一面上層合有透明保護薄膜 且於另一面上層合有相位差薄膜之複合偏光板。又，本發 明有關使用該複合偏光板之液晶顯示裝置。 參 【先前技術】 液晶顯示裝置有消耗電力低、以低電壓動作、輕量而 爲薄型等特徵，故已使用於各種顯示用裝置。液晶顯示裝 置係由液晶胞、偏光板、相位差薄膜、聚光薄片、擴散 膜、導光板、光反射薄片等之多種光學構件所構成。因 此，藉由減低構成該光學構件之膜或薄片之片數或厚度等 之改良，可實現液晶顯示裝置之生產效率或亮度的提高及 輕量、薄型化，對此種之硏究目前正盛行。 # 作爲減低構成該光學構件之膜或薄片之片數而實現液 晶顯示裝置之薄型化之手段，已知有使於偏光板單側之保 護膜兼作爲相位差薄膜之方法。例如特開平8-43 8 1 2號公 報（專利文獻1)中，記載有於偏光薄膜之兩面上層合保護 膜之偏光板，其保護膜之至少一者係以具有相位差薄膜機 能之熱塑性降冰片烯系樹脂構成。又，於特開平9-3252 1 6號公報（專利文獻2)中，記載有偏光薄膜之透明保 護層之至少單面上之透明保護層係以雙折射性模所構成。 對相位差薄膜所要求之機能之一爲可藉由液晶胞之雙 -5- 201007228 折射而於正面方向及傾斜方向光學補償相位差。因此，隨 著角度而變化相位差薄膜之傾斜方向之相位差値成爲非常 重要的事項。 已提案有各種不隨著角度變化而使相位差値爲幾乎固 定之相位差薄膜。例如，特開平2- 1 60204號公報（專利文 獻3)中，揭示一種相位差薄膜之製造方法，該方法係藉 由使固有雙折射爲正且分子於膜面之法線方向配向之薄膜 延伸，使於垂直入射時之相位差與自法線傾斜40°之方向 @ 入射時之相位差幾乎相同。此相位差薄膜於面內遲相軸方 向、面內進相軸方向及厚度方向之折射率分別作爲11X、Hy 及nz時，顯示nx>nz>ny之關係。 至於用以製造滿足nx>nz>ny關係之相位差薄膜之其 他方法，於特開平5 - 1 5 79 1 1號公報（專利文獻4)中揭示有 於樹脂薄膜之單面或兩面上黏著收縮性薄膜而形成層合 體，使該層合體進行加熱延伸處理之方法。此方法藉由使 樹脂薄膜與延伸同時於與其延伸軸正交之方向收縮，成爲 n 於厚度方向（Z方向）產生配向者，使樹脂薄膜之折射率分 布於延伸前後產生大的變化。因此，使用此方法製造之樹 脂薄膜較好爲易於以低延伸倍率產生相位差者。以往，作 爲使用此方法製造之樹脂薄膜，使用有例如聚碳酸酯系樹 脂薄膜、聚芳酸酯系樹脂薄膜、聚颯系樹脂薄膜等之芳香 族系樹脂薄膜。 又，於特開平7-23 0007號公報（專利文獻5)中，揭示 有於經單軸延伸之熱塑性樹脂薄膜之至少單面上，使具有 -6- 201007228 熱收縮性薄膜以使其熱收縮軸方向與該經單軸延伸之熱塑 性樹脂薄膜之延伸方向正交之方式貼合，藉由熱收縮而製 造相位差薄膜》由如此所得之經單軸延伸之熱塑性樹脂薄 膜所構成之相位差薄膜於其厚度方向亦經配向。於此方法 中，由於亦利用伴隨著熱收縮性薄膜之熱收縮之經單軸延 伸熱可塑性薄膜之收縮而於厚度方向產生配向者，故作爲 仍單軸延伸之熱塑性樹脂薄膜，主要使用亦展現相位差之 φ 芳香族系樹脂薄膜。 前述芳香族系樹脂薄膜由於光彈性係數之絕對値較 大，故相位差相對於應力亦易隨之變化。因此，於液晶胞 與偏光薄膜之間已貼合配置狀態暴露於高溫時，由於偏光 薄膜之收縮應力使相位差値自設計値偏移，由於於液晶顯 示裝置之背光的熱所發生之應力不均，使相位差値發生不 均，致使顯示特性惡化而成爲問題。 另一方面，降冰片烯系樹脂薄膜等之脂肪族系樹脂薄 # 膜由於光彈性係數之絕對値小，故近幾年來，使用於相位 差薄膜之變動提高。然而，脂肪族系樹脂薄膜由於一般難 展現相位差，故當然以芳香族系樹脂薄膜之如此低的延伸 倍率，即使提高延伸倍率，亦難以獲得所需之相位差値。 尤其，以使於延伸軸方向同時於厚度方向均獲得特定相位 差値之方式進行配向有其困難，故以前述專利文獻4或專 利文獻5所記載之方法若使用於脂肪族系樹脂薄膜則有其 界限。 特開2006-723〇9號公報（專利文獻6)中，提案一種相 201007228 位差薄膜之製造方法，其特徵係於降冰片烯系樹脂薄膜之 單面或雙面上’貼合於寬度方向之收縮率大之收縮性薄 膜，以使面內相位差値成爲l〇〇~3 50 nm且以（nx-nz)/(nx-ny)所表示之係數（Nz係數）成爲0.1 ~0.9之方式進行加熱延 伸。nx、ny及nz具有如先前之定義。依據此方法，可使 用難以展現相位差之降冰片烯樹脂薄膜，製造於延伸軸方 向且於厚度方向均配向且滿足nx>nz>ny之關係的相位差 薄膜。 專利文獻： 專利文獻1 :特開平8-43812號公報 專利文獻2:特開平9-325216號公報 專利文獻3:特開平2-1602 04號公報 專利文獻4:特開平5-157911號公報 專利文獻5:特開平7-230007號公報 專利文獻6:特開2006-72309號公報 【發明內容】 [發明所欲解決之課題] 於偏光薄膜單面上接著有以上述降冰片烯系樹脂薄膜 等之烯烴系樹脂薄膜所構成且滿足nx>nz>ny之關係的相 位差薄膜時，已了解於聚乙烯醇系偏光薄膜與纖維素乙酸 酯系保護膜之接著中使用以往採用之聚乙烯醇系接著劑其 接著力並不充分，於耐久性方面亦有問題。 本發明之目的係提供一種複合偏光板，其係於偏光薄 -8 - 201007228 膜之單面上貼合有由烯烴系樹脂薄膜所構成且滿足 nx>nz>ny之關係的相位差薄膜之複合偏光板，且該該偏光 板之偏光薄膜與該相位差薄膜之黏著性及密著強度優異， 且具有優異之耐久性。又，本發明之其他目的係使用此種 複合偏光板而提供耐久性（對於溫度濕度變動的耐久性等） 以及信賴性優異之液晶顯示裝置。 φ [用以解決課題之手段] 本發明人等欲開發在偏光薄膜單面上層合兼具有作爲 保護膜機能之薄膜之由烯烴系樹脂薄膜所構成之滿足 nx>nz>ny之關係之相位差薄膜而成之複合偏光板而進行積 極硏究。依據該硏究，已了解於以往偏光板中之聚乙烯醇 系偏光薄膜與纖維素乙酸酯系保護膜接著用之接著劑，無 法以充分強度使偏光薄膜與如前述之相位差薄膜接著。進 而重複硏究之結果，發現藉由使用以環氧樹脂作爲主成分 # 之接著劑，可製造偏光薄膜與相位差薄膜之接著性優異， 耐久性優異之複合偏光板，以及藉由使用在8 0 °C之溫度 顯示O.IMPa以上之貯存彈性率之高彈性黏著劑，可製作 偏光薄膜與相位差薄膜之密著強度優異且對溫度濕度之變 動耐久性亦優異之複合偏光板，因而完成本發明。 本發明有關一種複合偏光板，其具有偏光薄膜、在與 該偏光薄膜之一面上透過第一接著劑層層合之透明保護薄 膜、以及在該偏光薄膜之另一面上透過第二接著劑層層合 之相位差薄膜。本發明之複合偏光板中，相位差薄膜爲由 201007228 烯烴系樹脂所構成之薄膜，其面內遲相軸方向、面內進相 軸方向及厚度方向之折射率分別設爲1^、1^及nz，厚度 設爲d(nm)時，對於波長590nm之光滿足下述式（1)及 (2)。又，第二接著劑層係由含有藉由活性能量線之照射 或加熱而硬化之環氧樹脂之環氧樹脂組成物之硬化物層所 構成。 (1) (2) 1 5 Onm S (nx-ny) X d ^ 3 OOnm 參 0.2^(nx-nz)/(nx-ny) ^0.6 前述本發明之複合偏光板中，環氧樹脂較好爲分子內 具有1個以上鍵結至脂環式環之環氧基者。烯烴系樹脂較 好爲主要含有由脂環式烯烴所衍生之構成單位之樹脂。相 位差薄膜厚度較好爲20〜300μιη。 又，本發明係有關複合偏光板，其具備偏光薄膜及在 該偏光薄膜之一面上透過接著劑層層合之透明保護薄膜以 及在該偏光薄膜之另一面上透過黏著劑層層合之相位差薄 膜。於本發明之複合偏光板中，相位差薄膜爲由烯烴系樹 脂所構成之薄膜，對於波長590nm之光滿足前述式（1)及 (2)。黏著劑層係由於80°C之溫度顯示0.1 MPa以上之貯存 彈性率之高彈性黏著劑所構成。 於偏光薄膜與相位差薄膜貼合用之黏著劑於8(TC之溫 度之貯存彈性率爲O.IMPa以上，較好爲〇.i5MPa〜lOMPa 。藉由使用於如此高的溫度亦顯示一定以上之貯存彈性率 之高彈性黏著劑，可獲得偏光薄膜與由烯烴系樹脂所構成 -10- 201007228 之相位差薄膜之密著極良好地被提高，對於溫度濕度之變 動耐久性優異之複合偏光板。又，此高彈性黏著劑於23 t 之溫度的貯存彈性率較好爲 O.IMPa以上，更好爲 0.2~1 OMPa » 使用前述黏著劑之本發明之複合偏光板中，烯烴系樹 脂較好爲含有由脂環式烯烴所衍生之構成單位爲主之樹 脂。相位差薄膜之厚度較好爲20〜3 00微米。黏著劑層厚 0 度較好爲1〜40微米。 又，本發明提供一種液晶顯示裝置，其具備液晶胞、 配置在該液晶胞之單面或兩面上之前述複合偏光板。複合 偏光板係以其相位差薄膜側面向液晶胞之方式配置。 [發明效果] 依據本發明，提供一種具備偏光薄膜、貼合在該偏光 薄膜單面上之由烯烴系樹脂薄膜所構成之滿足nx>nz>ny • 之關係之相位差薄膜之複合偏光板，其中該偏光薄膜與該 相位差薄膜以充分高的接著強度貼合而具有優異耐久性之 複合偏光板。此種耐久性優異之本發明之複合偏光板即使 暴露於溫度或濕度變化大之環境下等之嚴苛環境下之情 況，亦不易產生外觀不良或光學特性劣化。又，使用此複 合偏光板之液晶顯示裝置之耐久性及信賴性優異。 【實施方式】 <複合偏光板> -11 - 201007228 [第一實施形態] 圖1爲顯示本發明之複合偏光板之層構成之一例之剖 面模式圖。圖1所示之複合偏光板100係在偏光薄膜101 之一面上透過第一接著劑層104層合有透明保護薄膜 102，於偏光薄膜101之另一面上透過第二接著劑層105 層合有相位差薄膜103者。以下，對構成複合偏光板之各 構件詳細加以說明。 (偏光薄膜） 所謂偏光薄膜，爲具有選擇_性透過來自自然光某一方 向之直線偏光之機能者。作爲偏光薄膜，舉例有例如於聚 乙烯醇系薄膜中吸附配向碘之碘系偏光薄膜；於聚乙烯醇 系薄膜中吸附配向二色性染料之染料系偏光薄膜；以及塗 佈溶致液晶狀態之二色性染料並配向固定化之塗佈型偏光 薄膜等。該等碘系偏光薄膜、染料系偏光薄膜及塗佈型偏 光薄膜由於具有使來自自然光之某一方向之直線偏光選擇 性透過，吸收該一方向之直線偏光之機能者，故稱爲吸收 型偏光薄膜。本發明中使用之偏光薄膜，不僅爲前述之吸 收型偏光薄膜’亦可爲具有使來自自然光之某一方向之直 線偏光選擇性透過，使該一方向之直線偏光反射或散射機 能之稱爲反射型偏光薄膜或散射型偏光薄膜者。又，本發 明所用之偏光薄膜並無限定於此處所例舉之偏光薄膜，只 要是具有可使來自自然光某一方向之直線偏光選擇性透過 之機能即可。該等偏光薄膜中，較好使用視覺辨識性優異 -12- 201007228 之吸收型偏光薄膜，其中，更好使用偏光度及透過率優異 之碘系偏光薄膜。 如前述，作爲偏光薄膜雖無特別限制，但可較好地使 用於聚乙烯醇系樹脂中吸附配向二色性色素者。更具體而 言，可較好地使用於經單軸延伸之聚乙烯醇系樹脂薄膜中 吸附配向二色性色素者。做爲二色性色素可使用碘或二色 性有機染料。 0 構成偏光薄膜之聚乙烯醇系樹脂可藉由使聚乙酸乙烯 酯樹脂皂化而得。作爲聚乙酸乙烯酯系樹脂，例示有乙酸 乙烯酯之均聚物之聚乙酸乙烯酯、以及乙酸乙烯酯與可與 其共聚合之其他單體之共聚物等。可與乙酸乙烯酯共聚合 之其他單體舉例有例如不飽和羧酸類、不飽和磺酸類、烯 烴類、乙烯醚類等。聚乙烯醇系樹脂之皂化度通常爲 85〜100莫耳％左右’較好爲98〜100莫耳％。聚乙烯醇系 樹脂亦可進而予以改質，例如亦可使用以醛類改質之聚乙 ® 烯甲縮醛、聚乙烯乙縮醛及聚乙烯丁縮醛等。聚乙烯醇系 樹脂之聚合度通常爲1，〇〇〇〜10,000左右，較好爲 1,500〜1 0,000 左右。 使前述聚乙烯醇系樹脂製膜，作爲偏光薄膜之原料捲 膜而使用。聚乙烯醇系樹脂之製膜方法並未特別限定，可 以公知方法製膜。聚乙烯醇系原料捲膜之厚度並無特別限 制，例如可爲2微米〜150微米左右，較好爲10微米〜丨50 微米左右。 偏光薄膜通常係經過下列步驟予以製造：使由前述聚 -13- 201007228 乙烯醇系樹脂所構成之原料捲膜進行水分調整之調濕步 驟；使聚乙烯醇系樹脂薄膜進行單軸延伸之步驟；以二色 性色素對聚乙烯醇系樹脂薄膜染色而吸附該二色性色素之 步驟；使吸附配向有二色性色素之聚乙烯醇系樹脂薄膜以 硼酸水溶液進行處理；以及於硼酸水溶液處理後進行水洗 之步驟。 單軸延伸可在由二色性色素染色之前進行，亦可與染 色同時進行，亦可於染色後進行。單軸延伸於二色性色素 染色後進行之情況，該單軸延伸可在硼酸處理前進行，亦 可在硼酸處理中進行。又，以該等複數階段進行單軸延伸 亦可。關於單軸延伸，可在周速不同之輥間單軸延伸，亦 可使用熱輥進行單軸延伸。又，亦可爲在大氣中進行等之 乾式延伸，亦可於溶劑中以膨潤狀態進行延伸之濕式延 伸。延伸倍率通常爲4~8倍左右。前述水洗後經乾燥所得 之偏光薄膜厚度可爲例如1~50微米左右，較好爲5〜5 0微 米左右。 (透明保護薄膜） 層合在偏光薄膜一面上之透明保護薄膜較好由透明 性、機械強度、熱安定性、水分遮蔽性、相位差値安定性 等優異之材料所構成。作爲此種透明保護薄膜用材料舉例 有例如聚對苯二甲酸乙二酯、聚萘二甲酸乙二酯等之聚酯 系樹脂；二乙醯基纖維素、三乙醯基纖維素等之纖維素系 樹脂；聚甲基丙烯酸甲酯等之（甲基）丙烯酸系樹脂；聚苯 201007228 乙烯、丙烯腈/苯乙烯共聚物、丙烯腈/丁二烯/苯乙烯共聚 物、丙烯腈/乙烯/苯乙烯共聚物、苯乙烯/馬來醯亞胺共聚 物、苯乙烯/馬來酸酐共聚物等之苯乙烯系樹脂；聚碳酸 酯系樹脂等。又，亦可使用降冰片烯系樹脂等之環狀烯烴 系樹脂；聚乙烯、聚丙烯、丙烯/乙烯共聚物等之非環狀 烯烴系樹脂；氯化乙烯系樹脂；耐綸、芳香族聚醯胺等之 醯胺系樹脂；芳香族聚醯亞胺、聚醯亞胺醯胺等之醯亞胺 φ 系樹脂；楓系樹脂；聚醚碾系樹脂；聚醚醚酮系樹脂；聚 苯硫醚系樹脂；乙烯醇系樹脂；偏氯乙烯系樹脂；乙烯縮 丁醛系樹脂；聚甲醛系樹脂；環氧系樹脂；以及該等樹脂 之摻合物等作爲透明保護薄膜用材料。該等中，若考慮與 偏光薄膜之接著容易性等，較好使用纖維素系樹脂、聚酯 系樹脂、（甲基）丙烯酸系樹脂及環狀或非環狀烯烴系樹 脂。透明保護薄膜較好先與偏光薄膜貼合，再施以皂化處 理、電暈處理、電漿處理等。 Φ 透明保護薄膜之厚度可適當決定，但一般就強度及操 作性等作業性等之觀點而言，爲1〜500微米左右。透明保 護薄膜之厚度較好爲10〜200微米，更好爲20~ 100微米。 只要此範圍內之厚度，即可機械性地保護偏光薄膜、即使 暴露於高溫高濕下亦不使偏光薄膜收縮而可保有安定之光 學特性。 (相位差薄膜） 層合在偏光薄膜另一面上之相位差薄膜係由烯烴系樹 -15- 201007228 脂所構成且滿足nx>nz>ny之關係之所謂雙軸性相位差薄 膜。本發明中，所謂烯烴系樹脂，意指主要由乙烯、丙烯 等之非環狀脂肪族烯烴或由降冰片烯或其取代物（以下亦 將該等統稱爲降冰片烯系單體）等之脂環式烯烴所衍生之 構成單位所構成之樹脂。烯烴系樹脂亦可爲使用兩種以上 單體之共聚物。 如前述，烯烴系樹脂較好主要爲衍生自脂環式烯烴之 構成單位所構成之樹脂，尤其，較好使用於主鏈中具有源 _ 自脂環式烯烴之環狀構造之環狀烯烴系樹脂。構成環狀烯 烴系樹脂之脂環式烯烴之典型例包含降冰片烯系單體。所 謂降冰片烯爲降冰片烷之一個碳-碳鍵爲雙鍵之化合物， 依據IUPAC命名法，係命名爲雙環[2.2.1]庚-2-烯者。降 冰片烯之取代物之例，以降冰片烯之雙鍵位置作爲1，2-位，包含於3-取代物、4-取代物、4,5-二取代物、二環戊 二烯及二甲橋八氫萘。該等主要由降冰片烯系單體所衍生 之構成單位所構成之樹脂，一般稱爲降冰片烯系樹脂。 @ 含有衍生自降冰片烯系樹脂之構成單位的降冰片烯系 樹脂於其構成單位中亦可具有降冰片烷環亦可不具有該 環。至於形成構成單位不具有降冰片烷環之降冰片烯系樹 脂之降冰片烯系單體爲例如藉由開環而成爲5員環者，代 表性舉例有降冰片烯、二環戊二烯、1 -或4-甲基降冰片 烯、4-苯基降冰片烯等。降冰片烯系樹脂爲共聚物時，該 等單體之排列狀態並無特別限制，既可爲無規共聚物，亦 可爲嵌段共聚物、亦可爲接枝共聚物。 -16- 201007228 降冰片烯系樹脂之更具體例包含有：降冰片烯系單體 之開環聚合物；降冰片烯系單體與其他單體之開環共聚 物：於該開環聚合物或該開環共聚物中加成馬來酸或加成 環戊二烯等之聚合物改質物；使該開環聚合物、開環共聚 物或聚合物改質物氫化所得之聚合物或共聚物；降冰片烯 系單體之加成聚合物；降冰片烯系單體與其他單體之加成 共聚物等。至於用以製造共聚物之其他單體舉例有烯 φ 烴類、環烯類、非共軛二烯類等。又，降冰片烯系樹脂亦 可爲降冰片烯系單體與其他脂環式烯烴之一種或兩種以上 所構成之共聚物。 前述具體例中，作爲降冰片烯系樹脂，較好使用利用 降冰片烯系單體之開環聚合物或使開環聚合物氫化而得之 樹脂。此種降冰片烯系樹脂可獲得成形加工性優異，且作 爲施以預先延伸處理之薄膜狀物，藉由對其貼合具有特定 收縮率之收縮性薄膜並經加熱收縮之均一性高 '具有大的 • 相位差値之相位差薄膜。使用此等降冰片烯系單體之開環 聚合物或開環共聚物之氫化物之市售品，以各商品名由曰 本 ΖΕΟΝ(股）販售之「ΖΕΟΝΕΧ」、「ZEONOR」；由 JSR(股）販售之「ARTON」等。該等降冰片烯系樹脂之薄 膜或其延伸薄膜亦分別爲例如由〇PTES(股）以商品名 「ZEONOR薄膜」販售；由JSR(股）以商品名「ARTON薄 膜」販售；或由積水化學工業（股）以商品名「ESCENA」 販售。 又，於本發明使用之相位差薄膜亦可使用由含有兩種 -17- 201007228 以上烯烴系樹脂之混合樹脂所構成之薄膜或由烯烴系樹脂 與其他熱塑性樹脂之混合樹脂所成之薄膜。含有兩種以上 該烯烴系樹脂之混合樹脂之例，包含如前述之環狀烯烴系 樹脂與非環狀脂肪族烯烴系樹脂之混合物。使用烯烴系樹 脂與其他熱塑性樹脂之混合樹脂時，其他熱塑性樹脂可依 據目的’選擇適宜且適當者。其他熱塑性樹脂之具體例包 含聚氯乙烯系樹脂、纖維素系樹脂、聚苯乙烯系樹脂、丙 烯腈/丁二烯/苯乙烯共聚樹脂、丙烯腈/苯乙烯共聚樹脂、 參 (甲基）丙烯酸系樹脂、聚乙酸乙烯酯系樹脂、聚偏氯乙烯 系樹脂等之慣用塑膠；聚醯胺系樹脂、聚乙縮醛系樹脂、 聚碳酸酯系樹脂、改質聚苯醚系樹脂、聚對苯二甲酸丁二 醇酯系樹脂及聚對苯二甲酸乙二醇酯系樹脂等之慣用工程 塑膠；聚苯硫醚系樹脂、聚楓系樹脂、聚醚硼系樹脂、聚 醚醚酮系樹脂、聚芳酸酯系樹脂、液晶性樹脂、聚醯胺醯 亞胺系樹脂、聚醯亞胺系樹脂及聚四氟乙烯系樹脂等之超 工程塑膠。該等熱塑性樹脂分別可單獨使用或與其他之一 φ 種以上組合使用。又，前述熱塑性樹脂亦可進行任意之適 當聚合物改質後而使用。聚合物改質之例包含共聚合、交 聯、分子末端改質、賦予立體規則性。 使用烯烴系樹脂與其他熱塑性樹脂之混合樹脂時，其 他熱塑性樹脂之含量，相對於樹脂全體，通常爲50重量 °/。左右以下’較好爲40重量％左右以下。藉由使其他熱塑 性樹脂之含量在此範圍內，可獲得光彈性係數之絕對値 小、顯示良好波長分散特性且耐久性或機械強度、透明性 -18- 201007228 優異之相位差薄膜。 以上所說明之烯烴系樹脂自一般使用之溶液藉由澆鑄 法或熔融押出法可予以製膜。使由兩種以上之混合樹脂所 構成之薄膜製膜時，其製膜方法並無特別限制，可舉例爲 例如使用以特定比例使樹脂成分於溶劑中攪拌混合所得之 均一溶液，藉由澆鑄法製作薄膜之方法，以及以特定比例 使樹脂成分熔融混合，藉由熔融押出法製作薄膜之方法 Φ 等。就使所得之相位差薄膜之平滑性高、獲得良好光學均 一性而言，較好使用自溶液之澆鑄法。 由前述烯烴系樹脂所構成之薄膜，在不損及本發明目 的之範圍，亦可依據需要含有殘留溶劑、安定劑、可塑 劑、抗老化劑、抗靜電劑、紫外線吸收劑等之其他成分。 又，爲使薄膜之表面粗糙度小，亦可含有勻化劑。 本發明使用之相位差薄膜爲如前述式（1)所示，對於 波長590nm之光的面內相位差値（nx-ny)xd在150〜300nm Φ 之範圍，又，如前述式（2)所示，稱爲Nz係數之 (nx-nz)/(nx-ny)在 0.2〜0_6 之範圍。其中，nx、ny 及 nz 分 別爲相位差薄膜之面內遲相軸方向、面內進相軸方向及厚 度方向之折射率，d(nm)爲相位差薄膜之厚度。藉由使用 具有此等特定折射率各向異性之相位差薄膜，於將複合偏 光板使用於液晶顯示裝置時，可就廣角度適當地補償液晶 胞顯示特性。 相位差薄膜厚度可在20~500微米左右之範圍，較好 爲20〜3 00微米。厚度只要該此範圍內，薄膜即可獲得充 -19- 201007228 分之自我支持性，可獲得廣範圍之相位差。 相位差薄膜使用作爲λ /2板時，對於波長5 90nm之 光的面內相位差値較好爲200〜300nm左右之範圍，更好 在240〜300nm左右之範圍。此對於波長590nm之光的面 內相位差値，因成爲測定波長之1/2而可進一步改善液晶 顯示裝置之顯示特性。相位差薄膜使用作爲λ /2板時，爲 使朝厚度方向進行充分之配向，較好其厚度在8 0~ 160 μιη 之範圍。更好在85〜145μιη之範圍。又，此相位差薄膜亦 可作爲λ /4板使用。 相位差薄膜之Νζ係數在0.2〜0.6之範圍，較好爲 0.3〜0.6之範圍。相位差薄膜之Νζ係數若在0.5附近，則 可獲得不隨角度變化之大致一定之相位差値，可更進一步 改善液晶顯示裝置之顯示特性。 (第二接著劑層） 第二接著劑層係用以接著前述偏光薄膜及前述相位差 薄膜之層。於本實施形態中，該等薄膜之接著係使用含有 藉由活性能量線（例如紫外線、可見光、電子束、X射線 等）之照射或加熱而硬化之環氧樹脂之硬化性環氧樹脂組 成物作爲接著劑。因此，第二接著劑層係由該硬化性環氧 樹脂組成物之硬化物層所構成。於形成第二接著劑層所用 之接著劑，一般係以前述環氧樹脂作爲主成分之無溶劑型 硬化性環氧樹脂組成物。此種接著劑可以充分高的接著強 度使前述偏光薄膜，尤其是由聚乙烯醇系樹脂所構成之偏 -20- 201007228 光薄膜與前述由烯烴系樹脂所構成之顯示特定折射率各向 異性之相位差薄膜貼合。藉此，可獲得耐久性優異之複合 偏光板。偏光薄膜與相位差薄膜之接著，係對於介隔在該 等薄膜間之接著劑之塗佈層照射活性能量線或加熱，藉由 使接著劑中所含之硬化性環氧樹脂硬化而進行。藉由活性 能量線之照射或熱引起環氧樹脂之硬化，較好爲由環氧樹 脂之陽離子聚合引起者。本發明中所謂之環氧樹脂意指分 • 子內具有2個以上環氧基之化合物。 本發明中，自耐候性或折射率、陽離子聚合性等之觀 點而言，於接著劑之硬化性環氧樹脂組成物中所含之環氧 樹脂較好爲分子內不含有芳香環之環氧樹脂。該等環氧樹 脂例示有氫化環氧樹脂、脂環式環氧樹脂及脂肪族環氧樹 脂等。 氫化環氧樹脂可藉由在觸媒存在下，使芳香族環氧樹 脂於加壓下進行選擇核氫化反應而獲得。至於芳香族環氧 # 樹脂舉例有例如雙酚A之二縮水甘油醚、雙酚F之二縮 水甘油醚以及雙酚S之二縮水甘油醚等之雙酚型環氧樹 脂；酚類酚醛清漆環氧樹脂、甲酚酚醛清漆環氧樹脂及羥 基苯甲醛酚類酚醛清漆環氧樹脂等之酚醛清漆型環氧樹 脂；四羥基苯基甲烷之縮水甘油醚、四羥基二苯甲酮之縮 水甘油醚及環氧化聚乙烯酚等之多官能基型之環氧樹脂 等。其中，作爲氫化環氧樹脂，較好使用氫化之雙酚A 之二縮水甘油醚。 所謂脂環式環氧樹脂意指分子內具有一個以上鍵結至 -21 - 201007228 脂環式環之環氧基之環氧樹脂。所謂「鍵結至脂環式環之 環氧基」爲具有於下式所示結構中自（CH2)m除去—個或 複數個氫原子之構造之基。下式中，111爲2〜5之整數。 [化1]201007228 VI. INSTRUCTION DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a composite polarizing plate laminated with a retardation film, and more particularly, a method in which a polarizing film is laminated on one surface and a transparent protective film is laminated on the other surface. A composite polarizing plate incorporating a retardation film. Further, the present invention relates to a liquid crystal display device using the composite polarizing plate. [Prior Art] Since the liquid crystal display device has characteristics such as low power consumption, low voltage operation, and light weight, it has been used in various display devices. The liquid crystal display device is composed of a plurality of optical members such as a liquid crystal cell, a polarizing plate, a retardation film, a condensing sheet, a diffusion film, a light guide plate, and a light reflecting sheet. Therefore, by reducing the number of sheets or thicknesses of the film or sheet constituting the optical member, the production efficiency or brightness of the liquid crystal display device can be improved, and the weight and thickness can be reduced. . As a means for reducing the number of films or sheets constituting the optical member to reduce the thickness of the liquid crystal display device, a method of forming a protective film on one side of the polarizing plate as a retardation film is known. For example, Japanese Laid-Open Patent Publication No. Hei 8-43 8 1 2 (Patent Document 1) discloses a polarizing plate in which a protective film is laminated on both surfaces of a polarizing film, and at least one of the protective films is made of a thermoplastic film having a phase difference film function. It is composed of a borneol-based resin. Further, Japanese Laid-Open Patent Publication No. Hei 9-3252166 (Patent Document 2) discloses that a transparent protective layer on at least one surface of a transparent protective layer of a polarizing film is formed by a birefringence mold. One of the functions required for the retardation film is to optically compensate the phase difference in the front direction and the oblique direction by the refraction of the liquid crystal cell -5 - 201007228. Therefore, it is very important to change the phase difference 倾斜 of the tilt direction of the retardation film depending on the angle. Various retardation films have been proposed which do not have a phase difference 随着 which is almost fixed with an angle change. For example, Japanese Laid-Open Patent Publication No. Hei 2-1-60204 (Patent Document 3) discloses a method of producing a retardation film by stretching a film having a positive intrinsic birefringence and a molecular orientation in a normal direction of a film surface. The phase difference at the time of normal incidence is almost the same as the phase difference when incident at a direction inclined by 40° from the normal line. When the refractive index of the retardation film in the in-plane slow axis direction, the in-plane phase axis direction, and the thickness direction is 11X, Hy, and nz, respectively, the relationship of nx > nz > ny is exhibited. As for another method for producing a retardation film which satisfies the relationship of nx > nz > ny, it is disclosed in Japanese Laid-Open Patent Publication No. Hei No. 5 - 1 5 79 1 1 (Patent Document 4) that the adhesive film adheres to one side or both sides of the resin film. The film is formed into a laminate, and the laminate is subjected to a heat extension treatment. In this method, the resin film is contracted in the direction orthogonal to the axis of extension thereof, and n is formed in the thickness direction (Z direction) to cause a large change in the refractive index of the resin film before and after the stretching. Therefore, the resin film produced by this method is preferably one which is easy to produce a phase difference at a low stretching ratio. In the past, as the resin film produced by the method, an aromatic resin film such as a polycarbonate resin film, a polyarylate resin film, or a polyfluorene resin film is used. In Japanese Patent Publication No. 7-230007 (Patent Document 5), it is disclosed that at least one surface of a uniaxially stretched thermoplastic resin film is provided with a heat shrinkable film of -6 to 201007228 for heat shrinkage. The axial direction is bonded to the direction in which the uniaxially stretched thermoplastic resin film extends orthogonally, and a retardation film is produced by heat shrinking. A phase difference film composed of the thus obtained uniaxially stretched thermoplastic resin film It is also aligned in its thickness direction. In this method, since the uniaxially-stretched thermoplastic film is contracted with the heat shrinkage of the heat-shrinkable film to form an aligner in the thickness direction, the main use is also exhibited as a uniaxially stretched thermoplastic resin film. φ Aromatic resin film with a phase difference. Since the aromatic resin film has a large absolute value of the photoelastic coefficient, the phase difference is liable to change with respect to the stress. Therefore, when the liquid crystal cell and the polarizing film are in a conformed state and exposed to a high temperature, the phase difference is shifted from the design due to the contraction stress of the polarizing film, and the stress generated by the heat of the backlight of the liquid crystal display device is not In addition, unevenness in phase difference , occurs, which causes deterioration in display characteristics and becomes a problem. On the other hand, the aliphatic resin thin film such as a norbornene-based resin film has an extremely small photoelastic coefficient, and thus the variation in the phase difference film has been improved in recent years. However, since the aliphatic resin film generally exhibits a phase difference, it is difficult to obtain a desired phase difference 即使 even if the stretching ratio is increased at such a low stretching ratio of the aromatic resin film. In particular, it is difficult to obtain a specific phase difference 値 in the direction of the extension axis in the thickness direction. Therefore, the method described in Patent Document 4 or Patent Document 5 is used for the aliphatic resin film. Its boundaries. JP-A-2006-723A (Patent Document 6) proposes a method for producing a phase 201007228-difference film characterized in that it is attached to the width direction on one side or both sides of a norbornene-based resin film. The shrinkable film having a large shrinkage ratio has an in-plane retardation 値 of 10 〇〇 to 3 50 nm and a coefficient (Nz coefficient) represented by (nx-nz)/(nx-ny) of 0.1 to 0.9. The method is to perform heating extension. Nx, ny, and nz have the definitions as previously defined. According to this method, a norbornene resin film which is difficult to exhibit a phase difference can be produced by a phase difference film which is oriented in the direction of the extension axis and which is aligned in the thickness direction and satisfies the relationship of nx > nz > ny. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. [Problem to be Solved by the Invention] On the single side of the polarizing film, the norbornene-based resin film or the like is attached to the surface of the polarizing film. In the case of a retardation film which is composed of an olefin-based resin film and which satisfies the relationship of nx > nz > ny, it is understood that a polyvinyl alcohol-based conventionally used polyvinyl alcohol-based polarizing film and a cellulose acetate-based protective film are used. The adhesive has insufficient adhesion and is also problematic in terms of durability. An object of the present invention is to provide a composite polarizing plate which is a composite of a retardation film which is composed of an olefin-based resin film and which satisfies the relationship of nx > nz > ny on one surface of a polarizing thin -8 - 201007228 film. In the polarizing plate, the polarizing film of the polarizing plate is excellent in adhesion and adhesion strength to the retardation film, and has excellent durability. Further, another object of the present invention is to provide a liquid crystal display device which is excellent in durability (such as durability against temperature and humidity fluctuation) and excellent in reliability by using such a composite polarizing plate. φ [Means for Solving the Problem] The inventors of the present invention have developed a phase satisfying the relationship of nx > nz > ny composed of an olefin-based resin film which is laminated on one surface of a polarizing film and which has a film function as a protective film. The composite polarizer made of a poor film was actively studied. According to this study, it has been known that the polyvinyl alcohol-based polarizing film and the cellulose acetate-based protective film in the conventional polarizing plate are used in combination with the adhesive, and the polarizing film cannot be adhered to the retardation film as described above with sufficient strength. As a result of repeating the investigation, it was found that by using an epoxy resin as a main component #, it is possible to manufacture a composite polarizing plate excellent in adhesion between a polarizing film and a retardation film, and excellent in durability, and by using it in 8 A high-elasticity adhesive exhibiting a storage modulus of O.IMPa or higher at a temperature of 0 ° C, and a composite polarizing plate having excellent adhesion strength of a polarizing film and a retardation film and excellent durability against temperature and humidity, thereby completing this invention. The present invention relates to a composite polarizing plate having a polarizing film, a transparent protective film laminated on a surface of the polarizing film through a first adhesive layer, and a second adhesive layer on the other side of the polarizing film. A phase difference film. In the composite polarizing plate of the present invention, the retardation film is a film composed of an olefin resin of 201007228, and the refractive indices in the in-plane slow axis direction, the in-plane axial direction, and the thickness direction are set to 1^, 1^, respectively. And nz, when the thickness is d (nm), the following formulas (1) and (2) are satisfied for light having a wavelength of 590 nm. Further, the second adhesive layer is composed of a cured layer of an epoxy resin composition containing an epoxy resin which is cured by irradiation with an active energy ray or heat. (1) (2) 1 5 Onm S (nx-ny) X d ^ 3 OOnm Reference 0.2^(nx-nz)/(nx-ny) ^0.6 In the above composite polarizing plate of the present invention, the epoxy resin is preferably It is one having more than one epoxy group bonded to the alicyclic ring in the molecule. The olefin-based resin is preferably a resin mainly containing a constituent unit derived from an alicyclic olefin. The phase difference film thickness is preferably from 20 to 300 μm. Further, the present invention relates to a composite polarizing plate comprising a polarizing film, a transparent protective film laminated on one surface of the polarizing film through an adhesive layer, and a phase difference laminated on the other side of the polarizing film through an adhesive layer. film. In the composite polarizing plate of the present invention, the retardation film is a film composed of an olefin resin, and the above formulas (1) and (2) are satisfied for light having a wavelength of 590 nm. The adhesive layer is composed of a high elastic adhesive exhibiting a storage modulus of 0.1 MPa or more at a temperature of 80 °C. The adhesive for bonding the polarizing film and the retardation film to 8 (the storage elastic modulus of the temperature of TC is O.IMPa or more, preferably 〇.i5MPa~lOMPa. It is also shown by using at such a high temperature. The high-elasticity adhesive having a high modulus of elasticity can be obtained by a polarizing film which is excellent in adhesion between a polarizing film composed of an olefin-based resin and a retardation film of -10-201007228, and which is excellent in durability against changes in temperature and humidity. Further, the storage elastic modulus of the high elastic adhesive at a temperature of 23 t is preferably O.IMPa or more, more preferably 0.2 to 1 OMPa. » In the composite polarizing plate of the present invention using the above adhesive, the olefin resin is more It is preferably a resin containing a constituent unit derived from an alicyclic olefin. The thickness of the retardation film is preferably from 20 to 300 μm, and the thickness of the adhesive layer is preferably from 0 to 10 μm. Provided is a liquid crystal display device comprising a liquid crystal cell and the composite polarizing plate disposed on one surface or both surfaces of the liquid crystal cell. The composite polarizing plate is disposed such that a side surface of the retardation film faces the liquid crystal cell. According to the present invention, there is provided a composite polarizing plate comprising a polarizing film and a retardation film which is formed of an olefin-based resin film and which has a relationship of nx > nz > ny • bonded to one surface of the polarizing film, wherein the polarizing film A composite polarizing plate in which the film and the retardation film are bonded together with a sufficiently high adhesive strength to have excellent durability. The composite polarizing plate of the present invention excellent in durability is exposed to an environment in which temperature or humidity changes greatly. In the case of a harsh environment, the appearance of the liquid crystal display device using the composite polarizing plate is excellent in durability and reliability. [Embodiment] <Composite polarizing plate> -11 - 201007228 [First Embodiment] Fig. 1 is a schematic cross-sectional view showing an example of a layer configuration of a composite polarizing plate of the present invention. The composite polarizing plate 100 shown in Fig. 1 is passed through a first adhesive layer 104 on one side of a polarizing film 101. The transparent protective film 102 is laminated, and the retardation film 103 is laminated on the other surface of the polarizing film 101 through the second adhesive layer 105. Each of the members of the polarizing plate will be described in detail. (Polarizing film) A polarizing film is a function of selectively displacing linear light from a certain direction of natural light. As the polarizing film, for example, a polyvinyl alcohol film is exemplified. An iodine-based polarizing film that adsorbs iodine; a dye-based polarizing film that adsorbs a dichroic dye in a polyvinyl alcohol-based film; and a coating-type polarizing film that is coated with a chromotropic dye in a liquid crystal state and is aligned and immobilized The iodine-based polarizing film, the dye-based polarizing film, and the coating-type polarizing film are called absorption because they have a function of selectively transmitting linearly polarized light from a certain direction of natural light and absorbing linear polarization in one direction. Type polarizing film. The polarizing film used in the present invention is not limited to the above-mentioned absorbing polarizing film ′, and may have a linear polarized light from a certain direction of natural light, and a linear polarized light reflecting or scattering function in the one direction is called a reflection. Type of polarizing film or scattering type polarizing film. Further, the polarizing film used in the present invention is not limited to the polarizing film exemplified herein, and may have a function of selectively transmitting linearly polarized light from a certain direction of natural light. Among these polarizing films, an absorbing polarizing film having excellent visibility and -12-201007228 is preferably used, and among them, an iodine-based polarizing film excellent in polarization degree and transmittance is preferably used. As described above, the polarizing film is not particularly limited, but it can be preferably used for adsorbing and aligning a dichroic dye in a polyvinyl alcohol resin. More specifically, it can be preferably used for adsorbing an alignment dichroic dye in a uniaxially stretched polyvinyl alcohol resin film. As the dichroic dye, iodine or a dichromatic organic dye can be used. 0 A polyvinyl alcohol-based resin constituting a polarizing film can be obtained by saponifying a polyvinyl acetate resin. The polyvinyl acetate-based resin is exemplified by a polyvinyl acetate of a homopolymer of vinyl acetate, a copolymer of vinyl acetate and another monomer copolymerizable therewith, and the like. Other monomers which can be copolymerized with vinyl acetate are exemplified by, for example, unsaturated carboxylic acids, unsaturated sulfonic acids, olefins, vinyl ethers and the like. The degree of saponification of the polyvinyl alcohol-based resin is usually from about 85 to 100 mol%, preferably from 98 to 100 mol%. The polyvinyl alcohol-based resin may be further modified, and for example, polyethylidene acetal, polyvinyl acetal, and polyvinyl butyral modified with an aldehyde may be used. The degree of polymerization of the polyvinyl alcohol-based resin is usually from 1, 〇〇〇 to 10,000, preferably from about 1,500 to about 1,000. The film made of the above polyvinyl alcohol-based resin is used as a raw material roll film of a polarizing film. The film forming method of the polyvinyl alcohol-based resin is not particularly limited, and a film can be formed by a known method. The thickness of the polyvinyl alcohol-based raw material roll film is not particularly limited and may be, for example, from about 2 μm to about 150 μm, preferably from about 10 μm to about 50 μm. The polarizing film is usually produced by subjecting a raw material roll film composed of the above poly-13-201007228 vinyl alcohol resin to moisture conditioning, and a step of uniaxially stretching the polyvinyl alcohol resin film; a step of adsorbing the dichroic dye by dyeing the polyvinyl alcohol-based resin film with a dichroic dye; treating the polyvinyl alcohol-based resin film having the dichroic dye adsorbed by the aqueous solution of boric acid; and after treating the aqueous solution of boric acid The step of washing with water. The uniaxial stretching can be carried out before the dyeing by the dichroic dye, or simultaneously with the dyeing, or after the dyeing. The uniaxial stretching is carried out after dyeing of the dichroic dye, which may be carried out before the boric acid treatment or in the boric acid treatment. Further, uniaxial stretching may be performed in the plural stages. For uniaxial extension, it can be uniaxially stretched between rolls with different peripheral speeds, or it can be uniaxially extended using a heat roll. Further, it may be a dry stretching which is carried out in the air or the like, or may be wet-extended in a swelling state in a solvent. The stretching ratio is usually about 4 to 8 times. The thickness of the polarizing film obtained by drying after the water washing may be, for example, about 1 to 50 μm, preferably about 5 to 50 μm. (Transparent Protective Film) The transparent protective film laminated on one surface of the polarizing film is preferably made of a material excellent in transparency, mechanical strength, thermal stability, moisture shielding property, and phase difference stability. Examples of the material for the transparent protective film include polyester resins such as polyethylene terephthalate and polyethylene naphthalate; and fibers such as diethyl fluorenyl cellulose and triethylene fluorenyl cellulose. Prime resin; (meth)acrylic resin such as polymethyl methacrylate; polyphenyl 201007228 ethylene, acrylonitrile/styrene copolymer, acrylonitrile/butadiene/styrene copolymer, acrylonitrile/ethylene/ A styrene copolymer, a styrene/maleimide copolymer, a styrene resin such as a styrene/maleic anhydride copolymer; a polycarbonate resin or the like. Further, a cyclic olefin resin such as a norbornene resin; a non-cyclic olefin resin such as polyethylene, polypropylene or a propylene/ethylene copolymer; a vinyl chloride resin; a nylon or an aromatic polymer; Amidoxime resin such as decylamine; quinone imine φ resin such as aromatic polyimine or polyamidamine; maple resin; polyether mill resin; polyether ether ketone resin; polyphenylene A thioether resin, a vinyl alcohol resin, a vinylidene chloride resin, an ethylene butyral resin, a polyoxymethylene resin, an epoxy resin, and a blend of these resins are used as a material for a transparent protective film. Among these, a cellulose resin, a polyester resin, a (meth)acrylic resin, and a cyclic or non-cyclic olefin resin are preferably used in consideration of ease of adhesion to a polarizing film. Preferably, the transparent protective film is first bonded to the polarizing film, and then subjected to saponification treatment, corona treatment, plasma treatment, and the like. Φ The thickness of the transparent protective film can be appropriately determined, but it is generally about 1 to 500 μm from the viewpoints of workability such as strength and workability. The thickness of the transparent protective film is preferably from 10 to 200 μm, more preferably from 20 to 100 μm. As long as the thickness is within this range, the polarizing film can be mechanically protected, and the polarizing film is not shrunk even when exposed to high temperature and high humidity, and the stable optical characteristics can be maintained. (Retardation film) The phase difference film laminated on the other surface of the polarizing film is a so-called biaxial retardation film which is composed of an olefin system -15-201007228 resin and which satisfies the relationship of nx > nz > ny. In the present invention, the olefin-based resin means a non-cyclic aliphatic olefin such as ethylene or propylene or a norbornene or a substituted product thereof (hereinafter collectively referred to as a norbornene-based monomer). A resin composed of constituent units derived from an alicyclic olefin. The olefin resin may be a copolymer using two or more kinds of monomers. As described above, the olefin-based resin is preferably a resin mainly composed of a constituent unit derived from an alicyclic olefin, and particularly preferably a cyclic olefin having a ring structure of a source-alicyclic olefin in a main chain. Resin. A typical example of the alicyclic olefin constituting the cyclic olefin resin includes a norbornene-based monomer. The norbornene is a compound in which a carbon-carbon bond of norbornane is a double bond, and is named as bicyclo [2.2.1] hept-2-ene according to the IUPAC nomenclature. An example of a substituent of norbornene, wherein the double bond position of norbornene is taken as 1,2-position, and is contained in 3-substituted, 4-substituted, 4,5-disubstituted, dicyclopentadiene, and A bridge of octahydronaphthalene. The resin composed mainly of the constituent units derived from the norbornene-based monomer is generally referred to as a norbornene-based resin. @ The norbornene-based resin containing a constituent unit derived from a norbornene-based resin may have a norbornane ring or may not have such a ring in its constituent unit. The norbornene-based monomer which forms a norbornene-based resin having a norbornane ring as a constituent unit is, for example, a ring-opening ring, and is a 5-membered ring, and representative examples thereof include norbornene and dicyclopentadiene. 1- or 4-methylnorbornene, 4-phenylnorbornene, and the like. When the norbornene-based resin is a copolymer, the arrangement state of the monomers is not particularly limited, and may be a random copolymer, a block copolymer or a graft copolymer. -16- 201007228 More specific examples of the norbornene-based resin include a ring-opening polymer of a norbornene-based monomer; a ring-opening copolymer of a norbornene-based monomer and another monomer: the ring-opening polymer Or a polymer modified product obtained by adding maleic acid or cyclopentadiene or the like to the ring-opening copolymer; a polymer or copolymer obtained by hydrogenating the ring-opening polymer, the ring-opening copolymer or the polymer modified product An addition polymer of a norbornene-based monomer; an addition copolymer of a norbornene-based monomer with another monomer, and the like. As the other monomer used for the production of the copolymer, there are exemplified by an ene φ hydrocarbon, a cycloolefin, a non-conjugated diene or the like. Further, the norbornene-based resin may be a copolymer of one or more of a norbornene-based monomer and another alicyclic olefin. In the above specific examples, as the norbornene-based resin, a ring-opening polymer using a norbornene-based monomer or a resin obtained by hydrogenating a ring-opening polymer is preferably used. Such a norbornene-based resin is excellent in moldability, and is a film-like material subjected to a pre-stretching treatment, and has a high uniformity by shrinking a shrinkable film having a specific shrinkage ratio and undergoing heat shrinkage. Large • Phase difference film with phase difference. A commercially available product of a ring-opening polymer of such a norbornene-based monomer or a hydrogenated product of a ring-opening copolymer, which is sold under the trade name "曰", "ZEONOR" by 曰本ΖΕΟΝ(股); "ARTON" sold by JSR (shares). The film of the norbornene-based resin or the stretched film thereof is also sold, for example, by 〇 PTES (trade name) under the trade name "ZEONOR film"; by JSR (share) under the trade name "ARTON film"; or Sekisui Chemical Industry Co., Ltd. is sold under the trade name "ESCENA". Further, the retardation film used in the present invention may be a film composed of a mixed resin containing two kinds of olefin resins of -17-201007228 or more or a mixed resin of an olefin resin and another thermoplastic resin. Examples of the mixed resin containing two or more kinds of the olefin-based resin include a mixture of the above-mentioned cyclic olefin-based resin and acyclic aliphatic olefin-based resin. When a mixed resin of an olefin resin and another thermoplastic resin is used, other thermoplastic resins may be selected as appropriate and appropriate depending on the purpose. Specific examples of the other thermoplastic resin include a polyvinyl chloride resin, a cellulose resin, a polystyrene resin, an acrylonitrile/butadiene/styrene copolymer resin, an acrylonitrile/styrene copolymer resin, and a ginseng (meth)acrylic acid. A conventional plastic such as a resin, a polyvinyl acetate resin, or a polyvinylidene chloride resin; a polyamide resin, a polyacetal resin, a polycarbonate resin, a modified polyphenylene ether resin, and a poly pair Conventional engineering plastics such as butyl phthalate resin and polyethylene terephthalate resin; polyphenylene sulfide resin, poly maple resin, polyether boron resin, polyether ether ketone system Super engineering plastics such as resin, polyarylate resin, liquid crystal resin, polyamidoximine resin, polyimide resin, and polytetrafluoroethylene resin. These thermoplastic resins may be used singly or in combination with one or more of φ or more. Further, the thermoplastic resin may be used after any suitable polymer has been modified. Examples of polymer modification include copolymerization, crosslinking, molecular terminal modification, and stereoregularity. When a mixed resin of an olefin resin and another thermoplastic resin is used, the content of the other thermoplastic resin is usually 50% by weight based on the entire resin. The left and right sides are preferably about 40% by weight or less. By setting the content of the other thermoplastic resin within this range, a phase difference film excellent in absolute decrease in the photoelastic coefficient, exhibiting good wavelength dispersion characteristics, and durability or mechanical strength, and transparency -18 - 201007228 can be obtained. The olefin-based resin described above can be formed into a film by a casting method or a melt-extrusion method from a solution which is generally used. When the film formed of two or more kinds of mixed resins is formed into a film, the film forming method is not particularly limited, and for example, a uniform solution obtained by stirring and mixing a resin component in a solvent at a specific ratio can be used, by casting. A method of producing a film, a method of melting a resin component at a specific ratio, a method of producing a film by a melt extrusion method, and the like. Insofar as the smoothness of the resulting retardation film is high and good optical uniformity is obtained, a casting method from a solution is preferably used. The film composed of the olefin-based resin may contain other components such as a residual solvent, a stabilizer, a plasticizer, an anti-aging agent, an antistatic agent, and an ultraviolet absorber, as needed, without impairing the scope of the present invention. Further, in order to make the surface roughness of the film small, a leveling agent may be contained. The retardation film used in the present invention is as shown in the above formula (1), and the in-plane phase difference 値(nx-ny)xd of light having a wavelength of 590 nm is in the range of 150 to 300 nm Φ, and further, as in the above formula (2) As shown, the (nx-nz)/(nx-ny) called the Nz coefficient is in the range of 0.2 to 0_6. Here, nx, ny, and nz are the in-plane retardation axis direction, the in-plane phase axis direction, and the thickness direction of the retardation film, respectively, and d (nm) is the thickness of the phase difference film. By using a retardation film having such specific refractive index anisotropy, when a composite polarizing plate is used for a liquid crystal display device, liquid crystal cell display characteristics can be appropriately compensated for at a wide angle. The thickness of the retardation film may be in the range of about 20 to 500 μm, preferably 20 to 300 μm. As long as the thickness is within this range, the film can be self-supported by the -19-201007228, and a wide range of phase differences can be obtained. When the retardation film is used as a λ/2 plate, the in-plane phase difference 光 of light having a wavelength of 5 90 nm is preferably in the range of about 200 to 300 nm, more preferably in the range of about 240 to 300 nm. As a result of the in-plane phase difference 光 of light having a wavelength of 590 nm, the display characteristics of the liquid crystal display device can be further improved by making it 1/2 of the measurement wavelength. When the retardation film is used as the λ/2 plate, it is preferably in the range of 80 to 160 μm in order to sufficiently align the thickness direction. Better in the range of 85~145μηη. Further, this retardation film can also be used as a λ /4 plate. The twist coefficient of the retardation film is in the range of 0.2 to 0.6, preferably in the range of 0.3 to 0.6. When the Νζ coefficient of the retardation film is around 0.5, a substantially constant phase difference 不 which does not vary with the angle can be obtained, and the display characteristics of the liquid crystal display device can be further improved. (Second Adhesive Layer) The second adhesive layer is used to follow the layers of the polarizing film and the retardation film. In the present embodiment, the film is followed by a curable epoxy resin composition containing an epoxy resin which is hardened by irradiation or heating by an active energy ray (for example, ultraviolet light, visible light, electron beam, X-ray, etc.). As an adhesive. Therefore, the second adhesive layer is composed of a cured layer of the curable epoxy resin composition. The adhesive used for forming the second adhesive layer is generally a solventless curable epoxy resin composition containing the above epoxy resin as a main component. Such an adhesive can have a sufficiently high bonding strength to cause the polarizing film, in particular, a -20-201007228 optical film composed of a polyvinyl alcohol-based resin and the above-mentioned olefin-based resin to exhibit a specific refractive index anisotropy. The phase difference film is bonded. Thereby, a composite polarizing plate excellent in durability can be obtained. The polarizing film and the retardation film are then applied to the coating layer of the adhesive interposed between the films by applying an active energy ray or heating, and curing the curable epoxy resin contained in the adhesive. The curing of the epoxy resin by irradiation of the active energy ray or heat is preferably caused by cationic polymerization of the epoxy resin. The epoxy resin in the present invention means a compound having two or more epoxy groups in the fraction. In the present invention, from the viewpoints of weather resistance, refractive index, cationic polymerizability, etc., the epoxy resin contained in the curable epoxy resin composition of the adhesive is preferably an epoxy having no aromatic ring in the molecule. Resin. Examples of the epoxy resin include a hydrogenated epoxy resin, an alicyclic epoxy resin, and an aliphatic epoxy resin. The hydrogenated epoxy resin can be obtained by subjecting an aromatic epoxy resin to selective nuclear hydrogenation under pressure in the presence of a catalyst. Examples of the aromatic epoxy # resin include bisphenol type epoxy resins such as bisphenol A diglycidyl ether, bisphenol F diglycidyl ether, and bisphenol S diglycidyl ether; phenol novolac rings; Oxygen resin, cresol novolak epoxy resin and phenolic phenolic novolac epoxy resin such as novolak type epoxy resin; glycidyl ether of tetrahydroxyphenylmethane, glycidyl ether of tetrahydroxybenzophenone And an epoxy resin or the like having a polyfunctional type such as epoxidized polyvinylphenol. Among them, as the hydrogenated epoxy resin, hydrogenated bisphenol A diglycidyl ether is preferably used. The alicyclic epoxy resin means an epoxy resin having one or more epoxy groups bonded to the epoxy group of the -21 - 201007228 alicyclic ring. The "epoxy group bonded to the alicyclic ring" is a group having a structure in which one or a plurality of hydrogen atoms are removed from (CH2)m in the structure represented by the following formula. In the following formula, 111 is an integer of 2 to 5. [Chemical 1]

因此，具有於上式中自（CH2)m除去一個或複數個氫 參 原子之構造之基鍵結至具有其他化學構造之基之化合物可 成爲脂環式環氧樹脂。（CH2)m中之一個或複數個氫原子 亦可經甲基或乙基等之直鏈狀烷基適當予以取代。脂環式 環氧樹脂中，具有氧雜雙環己烷環（環氧基環戊烷環，前 述中m = 3者）或氧雜雙環庚環（環氧基環戊烷環，前述中 m = 4者）之環氧樹脂，由於可獲得接著強度優異之接著劑 而較佳。以下例示本發明中較佳使用之脂環式環氧樹脂之 具體例，但不限定於該等化合物者。 © U)以下式（I)表示之環氧基環己基甲基環氧基環己烷 羧酸酯類： [化2]Therefore, a compound having a structure in which one or a plurality of hydrogen atom atoms are removed from (CH2)m in the above formula is bonded to a group having another chemical structure can be an alicyclic epoxy resin. One or a plurality of hydrogen atoms of (CH2)m may be appropriately substituted with a linear alkyl group such as a methyl group or an ethyl group. In the alicyclic epoxy resin, there is an oxabicyclohexane ring (epoxycyclopentane ring, m = 3 in the foregoing) or an oxabicycloheptane ring (epoxycyclopentane ring, in the above m = The epoxy resin of the above 4 is preferable because an adhesive having excellent adhesion strength can be obtained. Specific examples of the alicyclic epoxy resin preferably used in the present invention are exemplified below, but are not limited to those compounds. © U) Epoxycyclohexylmethylcyclooxycyclohexane carboxylates represented by the following formula (I): [Chemical 2]

(式中，R1及R2互相獨立地表示氫原子或碳數1~5之直鏈 -22- 201007228 狀烷基）。 (b)以下式（II)表示之烷二醇之環氧基環己烷羧酸酯 類： [化3] 0 R3 i?(wherein R1 and R2 independently of each other represent a hydrogen atom or a linear chain of 1 to 5 carbon atoms -22 to 201007228 alkyl group). (b) an epoxy group of an alkanediol represented by the following formula (II): [Chemical 3] 0 R3 i?

C-〇-(CH2)n-〇-C cp〇 R4 (Π)C-〇-(CH2)n-〇-C cp〇 R4 (Π)

(式中，R3及R4互相獨立地表示氫原子或碳數1〜5之直鏈 狀烷基，η表示2〜20之整數）。 (c)以下式（III)表示之二羧酸之環氧基環己基甲酯 類： [化4](wherein R3 and R4 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and η represents an integer of 2 to 20). (c) an epoxycyclohexylmethyl ester of a dicarboxylic acid represented by the following formula (III):

〇<J R5 Ο Ο CH2-〇-C-(CH2)p-C-〇-CH2 ρ^° R6 (IE) (式中，R5及R6互相獨立地表示氫原子或碳數1~5之直鏈 狀烷基，P表示2~20之整數）。 (d)以下式（IV)表示之聚乙二醇之環氧基環己基甲醚 類： -23- 201007228 [化5]〇<J R5 Ο Ο CH2-〇-C-(CH2)pC-〇-CH2 ρ^° R6 (IE) (wherein R5 and R6 independently represent a hydrogen atom or a linear chain having a carbon number of 1 to 5 An alkyl group, P represents an integer from 2 to 20). (d) Epoxycyclohexyl methyl ether of polyethylene glycol represented by the following formula (IV): -23- 201007228 [Chemical 5]

CH2—(OC2H4>q-0、CH R8 (N) (式中，R7及R8互相獨立地表示氫原子或碳數1〜5之直鏈 狀烷基，q表示2〜10之整數）。 (e)以下式（v)表示之烷二醇之環氧基環己基甲醚類： [化6] (V) CH2-〇-(CH2)r-〇-CH2 R9 R1 (式中，R9及R1()互相獨立地表示氫原子或碳數1〜5之直 鏈狀烷基，r表示2〜2 0之整數）。 (f)以下式（VI)表示之二環氧基三吡略化合物： [化7] (VI) R11 (式中，R11及R12互相獨立地表示氫原子或碳數1〜5之直 鏈狀烷基）。 (g)以下式（VII)表示之二環氧基單吡咯化合物： -24 - 201007228 am vc<S。 （™) R13 (式中，R13及R14互相獨立地表示氫原子或碳數1〜5之直 鍵狀院基）。 (h)以下式（VIII)表示之乙烯基環己烯二環氧化物類： [化9]CH2—(OC2H4>q-0, CH R8(N) (wherein R7 and R8 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and q represents an integer of 2 to 10). e) Epoxycyclohexyl methyl ether of an alkanediol represented by the following formula (v): [Chem. 6] (V) CH2-〇-(CH2)r-〇-CH2 R9 R1 (wherein R9 and R1 () independently represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms, and r represents an integer of 2 to 20). (f) A dicyclooxytripyridyl compound represented by the following formula (VI): (VI) R11 (wherein R11 and R12 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (g) A dicyclooxy group represented by the following formula (VII) Pyrrole compound: -24 - 201007228 am vc<S. (TM) R13 (wherein R13 and R14 each independently represent a hydrogen atom or a straight bond group having a carbon number of 1 to 5). (h) The following formula (VIII) ) indicates vinylcyclohexene diepoxides: [Chemical 9]

(M) (式中，R15表示氫原子或碳數1〜5之直鏈狀烷基）。 (i)以下式（IX)表示之環氧基環戊基醚類： [化 10](M) (wherein R15 represents a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (i) Epoxycyclopentyl ethers represented by the following formula (IX): [Chemical 10]

(K) (式中，R16及R17互相獨立地表示氫原子或碳數1〜5之直 鏈狀烷基）。 (j)以下式（X)表示之二環氧基三環癸烷類： -25- 201007228 [化 11](K) (wherein R16 and R17 each independently represent a hydrogen atom or a linear alkyl group having 1 to 5 carbon atoms). (j) Dicyclooxy tricyclodecanes represented by the following formula (X): -25- 201007228 [Chem. 11]

(式中，R18表示氫原子或碳數1〜5之直鏈狀院基）。 即述例不之脂環式環氧樹脂中’以下之脂環式環氧樹 脂，基於其係市售、或爲其類似物、較容易獲得等之理 由，故而可較好地使用。 (A) 7-氧雜雙環[4.1.0]庚院-3-竣酸與（7_氧雜雙環 [4.1.0]庚-3-基）甲醇等之酯化物[式⑴中，r1=r2 = h之化合 物] (B) 4-甲基-7-氧雜雙環[4.1.0]庚烷-3-竣酸與（4-甲基-7-氧雜雙環[4.1.0]庚-3-基）甲醇之酯化物[式⑴中，Ri=4_ CH3 ’ R2 = 4-CH3 之化合物] (C) 7-氧雜雙環[4.1.0]庚烷-3-羧酸與l，2-乙烷二醇之 酯化物[式（II)中，R3 = R4 = H，n = 2之化合物] (D) (7-氧雜雙環[4.1.0]庚-3 _基）甲醇與己二酸之酯化 物[式（III)中，R5 = R6 = H，p = 4之化合物] (E) (4-甲基-7-氧雜雙環[4.1.0]庚-3-基）甲醇與己二酸 之酯化物[式（III)中，R5=4-CH3 ’ R6 = 4-CH3，p = 4 之化合 物] (F) (7-氧雜雙環[4.1.0]庚-3-基）甲醇與1，2-乙烷二醇 之酯化物[式（V)中，R9 = R1Q = H，r = 2之化合物] 又，作爲脂肪族環氧樹脂’可舉例爲脂肪族多元醇或 -26- 201007228 其環氧烷加成物之聚縮水甘油醚。更具體而言，舉例有 1,4-丁二醇之二縮水甘油醚；1，6-己二醇之二縮水甘油 醚；甘油之三縮水甘油醚；三羥甲基丙烷之三縮水甘油 醚；聚乙二醇之二縮水甘油醚；丙二醇之二縮水甘油醚； 以及於乙二醇、丙二醇或甘油等之脂肪族多元醇上加成一 或兩種以上之環氧烷（環氧乙烷或環氧丙烷）所得之聚醚多 元醇之聚縮水甘油醚等。 • 本發明中，環氧樹脂可單獨僅使用一種，亦可倂用兩 種以上。本發明中使用之環氧樹脂之環氧當量通常爲 30~3,000克/當量，較好50-1,500克/當量之範圍。環氧 當量若低於30克/當量，則有硬化後之複合偏光板之可撓 性降低，接著強度降低之可能性。另一方面，若超過 3，00 0克/當量，則有與接著劑中含有之其他成分之相溶性 降低之可能性。 本發明中’由反應性之觀點而言，作爲環氧樹脂之硬 # 化反應較好使用陽離子聚合。爲此，接著劑之硬化性環氧 樹脂組成物較好含有陽離子聚合起始劑。陽離子聚合起始 劑係藉由可見光、紫外線、X射線、電子束等之活性能量 線之照射或加熱而發生陽離子物種或路易士酸，並起始環 氧基之聚合反應。雖亦可使用任一類型之陽離子聚合起始 劑，但由作業性之觀點而言，較好爲賦予潛在性。以下， 藉由活性能量線之照射而發生陽離子物種或路易士酸，並 起始環氧基之聚合反應之陽離子聚合起始劑稱爲「光陽離 子聚合起始劑」，藉由熱而發生陽離子物種或路易士酸， -27- 201007228 並起始環氧基之聚合反應之陽離子聚合起始劑稱爲「熱陽 離子聚合起始劑」。 使用光陽離子聚合起始劑，藉由活性能量線之照射進 行黏著劑之硬化之方法，於常溫之硬化成爲可能，對於必 須考慮因偏光薄膜之耐熱性或膨脹引起變形之情況減少且 相位差薄膜與偏光薄膜爲良好接著之方面而言較爲有利。 又，光陽離子聚合起始劑由於藉由光進行觸媒作用，故將 其混合於環氧樹脂中，該接著劑之貯存安定性以及作業性 亦優異。 作爲光陽離子聚合起始劑並無特別限制，而可舉例爲 例如芳香族重氮鎗鹽、芳香族碘鎗鹽、芳香族鏑鹽等之陰 離子鹽，及鐵-芳烴錯合物等。 至於芳香族重氮鎗鹽，舉例爲例如苯重氮鑰六氟銻酸 鹽、苯重氮鎗六氟磷酸鹽、苯重氮鑰六氟硼酸鹽等。 至於芳香族碘鎗鹽舉例爲例如二苯基碘鎗肆（五氟苯 基）硼酸鹽、二苯基碘鑰六氟磷酸鹽、二苯基碘鎗六氟銻 酸鹽、二（4-壬基苯基）碘鎗六氟磷酸鹽等。 至於芳香族锍鹽舉例爲例如三苯基锍六氟磷酸鹽、三 苯基鏑六氟銻酸鹽、三苯基銃肆（五氟苯基）硼酸鹽、4，4’-雙（二苯基磺醯基）二苯基硫醚雙（六氟磷酸鹽）、4,4，·雙[二 (;S-羥基乙氧基）苯磺醯基]二苯基硫醚雙（六氟銻酸鹽）、 4,4，-雙[二（Θ -羥基乙氧基）苯磺醯基]二苯基硫醚雙（六氟 鱗酸鹽）、7-[二（對-甲苯醯基）磺醢基]-2-異丙基噻觸酮六 氟鍊酸鹽、7-[二（對-甲苯醯基）磺醯基]-2 -異丙基噻_酮肆 201007228 (五氟苯基）硼酸鹽、4-苯基羰基-4’-二苯基磺醯基-二苯硫 醚六氟磷酸鹽、4-(對-第三丁基苯基羰基）-4’-二苯基磺醯 基-二苯基硫醚六氟銻酸鹽、4-(對-第三丁基苯基羰基）-4’-二（對-甲苯醯基）磺醯基-二苯基硫醚肆（五氟苯基）硼酸鹽 等。 作爲鐵-芳烴錯合物舉例爲例如二甲苯-環戊二烯基鐵 (II)六氟銻酸鹽、枯烯·環戊二烯基鐵（II)六氟磷酸鹽、二 φ 甲苯-環戊二烯基鐵（II)-參（三氟甲基磺醯基）甲基化物等。 該等光陽離子聚合起始劑之市售品爲可容易獲得者， 舉例爲例如各以商品名 「KAYARAD PCI-220」、 「KAYARAD PCI-620」（以上爲曰本化藥（股）製）、「UVI-6990」（聯合碳化公司製）、「ADEKA OPTOMER SP-150」、「ADEKA OPTOMER SP-170」（以上爲 ADEKA(股） 製）、「 CI-5102 」、「 CIT-1370 」、「 CIT-1682 」、 「CIP-1866S」、「CIP-2048S」、「CIP-2064S」（以上爲 φ 日本曹達（股）製）、「DPI-101」、「DPI-102」、「DPI-103」、「DPI-105」、「MPI-103」、「MPI-105」、 「BBI-101」、「BBI-102」、「BBI-103」、「BBI-105」' 「 TPS-101 」、「 TPS-102」、「 TPS-103」、 「TPS-105」、「MDS-103」、「MDS-105」' 「DTS- 102」、「DTS-103」（以上爲綠化學（股）製）、「PI-2074」 (RHODIA公司製）等。 該等光陽離子聚合起始劑各可單獨使用或者亦可與其 他一種以上混合使用。該等中，尤其是芳香族锍鹽，由於 -29- 201007228 在300nm以上之波長領域亦具有紫外線吸收特性，故可 獲得硬化性優異、具有良好機械強度及接著強度之硬化 物，故而可較好地使用。 光陽離子聚合起始劑之調配量，對於環氧樹脂100重 量份，通常爲0.5〜20重量份，較好爲1重量份以上，又 較好爲15重量份以下。光陽離子聚合起始劑之調配量， 相對於環氧樹脂1〇〇重量份，若低於0.5重量份，則硬化 性變不足，有機械強度或接著強度降低之傾向。又，光陽 @ 離子聚合起始劑之調配量，相對於環氧樹脂100重量份， 若超過20重量份，則由於硬化物中離子性物質增加導致 硬化物吸濕性變高，而有複合偏光板之耐久性降低之可能 性。 使用光陽離子聚合起始劑時，接著劑之硬化性環氧樹 脂組成物依據需要可進而含有光增感劑。使用光增感劑， 可提高陽離子聚合之反應性，可提高硬化物之機械強度及 接著強度。至於光增感劑，舉例有例如羰基化合物、有機 馨 硫化合物、過硫化物、氧化還原系化合物、偶氮及重氮化 合物、鹵素化合物以及光還原性色素等。光增感劑之更具 體例，包含苯偶因甲醚、苯偶因丙醚、-二甲氧基-α-苯基苯乙酮等之苯偶因衍生物；二苯甲酮、2,4-二氯二 苯甲酮、鄰-苯甲醯基苯甲酸甲酯、4,4’-雙（二甲胺基）二 苯甲酮、4,4’-雙（二乙胺基）二苯甲酮等之二苯甲酮衍生 物：2-氯噻噸酮、2-異丙基噻噸酮等之噻噸酮衍生物；2· 氯蒽醌、2-甲基蒽醌等之蒽醌衍生物；Ν-甲基吖啶酮、Ν- -30- 201007228 丁基吖啶酮等之吖啶酮衍生物；以及α,α-二乙氧基苯乙 酮、苄基、芴酮、咕噸酮、鈾醯（uranyl)化合物、鹵素化 合物。其中，並不限定於該等。該等光增感劑各可單獨使 用，亦可與其他一種以上混合使用。光增感劑，於硬化性 環氧樹脂組成物100重量份中，較好以〇_1〜20重量份之 範圍內含有。 至於熱陽離子聚合起始劑，可舉例爲苄基鏑鹽、噻吩 φΐ 鑰鹽、锍脲（thiuronium)鹽、节基錢、耻陡鑰鹽、聯胺鑰 (hydrazinium)鹽、羧酸酯、磺酸酯以及胺醯胺等。該等 熱陽離子聚合起始劑之市售品可容易地獲得，例如分別以 商品名舉例有「ADEKA OPTOMER CP77」、「ADEKA OPTOMER CP66」（以上爲 ADEKA(股）製）、「CI-2639」、「CI-2624」（以上爲日本曹達（股）製）、「SUN AID SI-60L」、「SUN AID SI-80L」、「SUN AID SI-100L」（以上爲三新化學工業股份有限公司製）等。 • 接著劑中所含之環氧樹脂可藉由光陽離子聚合或熱陽 離子聚合之任一種予以硬化，或亦可藉由光陽離子聚合及 熱陽離子聚合兩者予以硬化。於後者之情形，較好倂用光 陽離子聚合起始劑及熱陽離子聚合起始劑。 硬化性環氧樹脂組成物亦可進而含有氧雜環丁烷類或 多元醇類等之促進陽離子聚合之化合物。 氧雜環丁烷類爲分子內具有4員環醚之化合物。氧雜 環丁烷類之例包含3-乙基-3-羥基甲基氧雜環丁烷、1，4_雙 [(3-乙基-3-氧雜環丁基）甲氧基甲基]苯、3-乙基-3-(苯氧 -31 - 201007228 基甲基）氧雜環丁院、二[(3-乙基-3 -氧雜環丁基）甲基]醚、 3-乙基-3·(2-乙基環己氧基甲基）氧雜環丁烷、酚酚醛清漆 氧雜環丁烷。該等氧雜環丁烷類之市售品可容易地獲得’ 例如分別亦以商品名舉例爲「ARON ΟΧΕΤΑΝΕ ΟΧΤ-101」、「ARON ΟΧΕΤΑΝΕ ΟΧΤ-121」、「ARON ΟΧΕΤΑΝΕ ΟΧΤ-21 1」、「ARON ΟΧΕΤΑΝΕ ΟΧΤ-22 1」、 「ARON ΟΧΕΤΑΝΕ ΟΧΤ-212」（以上爲亞東合成（股）製） 等。氧雜環丁烷類於硬化性環氧樹脂組成物中，通常以 @ 5~95重量％，較好爲30〜70重量％之比例含有。 多元醇類較好爲不存在有酚性羥基以外之酸性基者。 該等多元醇類，可舉例爲例如不具有羥基以外之官能基之 多元醇化合物、聚酯多元醇化合物、聚己內酯多元醇化合 物、具有酚性羥基之多元醇化合物、聚碳酸酯多元醇等。 該等多元醇類之分子量通常爲48以上，較好爲62以上， 進而更好爲100以上，且較好爲1，〇〇〇以下。多元醇類於 硬化性環氧樹脂組成物中，通常以50重量％以下，較好 @ 爲3 0重量％以下之比例含有。 再者，硬化性環氧樹脂組成物只要不損及本發明效 果，可含有其他添加劑例如離子捕捉劑、抗氧化劑、鏈轉 移劑、增感劑、黏著賦予劑、熱塑性樹脂、塡充劑、流動 調節劑、可塑劑、消泡劑等。作爲離子捕捉劑，舉例有例 如粉末狀鉍系、銻系、鎂系、鋁系、鈣系、鈦系等之無機 化合物及該等之混合物。至於抗氧化劑舉例有例如受阻酚 系抗氧化劑等。 -32- 201007228 由含有如前述之環氧樹脂之硬化性環氧樹脂組成物所 構成之接著劑可塗佈在偏光薄膜或相位差薄膜之接著面 上，或者塗佈於該兩者之接著面上之後，以塗佈接著劑之 面予以貼合，藉由照射活性能量線或者藉由加熱使該未硬 化之接著劑層硬化，藉此使偏光薄膜與相位差薄膜透過由 硬化性環氧樹脂組成物之硬化物層所構成之第二接著劑層 予以貼合。接著劑之塗佈方法並無特別限制，可利用例如 ^ 刮板、金靥線棒、模嘴塗佈器、卡馬塗佈器（camma coater) 、凹版塗佈器等之各種塗佈方式。 於偏光薄膜與相位差薄膜之接著中使用之含有該環氧 樹脂之接著劑，基本上可使用實質上不含有溶劑成分之無 溶劑型接著劑，但爲具有適於各塗佈方式之最適宜黏度範 圍，爲了調整黏度，亦可於該接著劑中含有溶劑。作爲溶 劑，較好使用不使偏光薄膜之光學性能降低、可良好溶解 環氧樹脂組成物者。該等溶劑並無特別限制，而可舉例爲 Φ 以甲苯爲代表之烴類、以乙酸乙酯爲代表之酯類等之有機 溶劑。 藉由照射活性能量線進行接著劑之硬化時，使用之光 源並無特別限制，而可使用具有波長400nm以下之發光 分布之例如低壓水銀燈、中壓水銀燈、高壓水銀燈、超高 壓水銀燈、化學螢光燈、黑光燈、微波激活水銀燈、金屬 鹵素燈等。對硬化性環氧樹脂組成物之光照射強度，可隨 著該組成物而異，但較好對光陽離子聚合起始劑之活化性 有效之波長領域之照射強度爲0.1〜100 mW/cm2之範圍。 -33- 201007228 對硬化性環氧樹脂組成物之光照射強度若未達0.1 mW/cm2 ，則反應時間過長，若超過100 mW/cm2，則由於來自燈 之輻射熱以及硬化性環氧樹脂組成物聚合時之發熱，有可 能使硬化性環氧樹脂組成物產生黃變或偏光薄膜產生劣 化。對硬化性環氧樹脂組成物之光照射時間，可爲視每組 成物加以控制者，依然未特別限定，但較好設定爲以照射 強度與照射時間之乘積所表示之累積光量成爲1〇〜5,000 mJ/cm2。對硬化性環氧樹脂組成物之累積光量若未達10 _ mJ/cm2，則源自光陽離子聚合起始劑之活性物種之發生不 足，有接著劑硬化不充分之可能性。又，累積光量若超過 5,000 mJ/cm2，則照設時間非常長，對生產性方面而言變 得不利。 藉由熱進行接著劑之硬化時，可藉一般已知之方法加 熱，其條件等亦無特別限制，但通常在可使添加在硬化性 環氧樹脂組成物中之熱陽離子聚合起始劑產生陽離子物種 或路易士酸之溫度以上進行加熱，具體而言，加熱溫度爲 . 例如50〜2 0 0°C左右。 於活性能量線之照射或加熱任一條件下硬化時，亦較 好在不使偏光薄膜之偏光度、透光率及色相、透明保護薄 膜之透明性及相位差薄膜之相位差特性等之複合偏光板之 諸機能降低之範圍內硬化。由硬化性環氧樹脂組成物所構 成之第二接著劑層之厚度，通常爲50微米以下，較好爲 20微米以下，又更好爲10微米以下。 -34- 201007228 (第一接著劑層） 第一接著劑層爲用以使偏光薄膜與透明保護薄膜接著 之層。該等薄膜之接著所用之接著劑（形成第一接著劑層 之接著劑）並未特別限定，可舉例爲使用例如聚乙烯醇系 樹脂、環氧系樹脂、胺基甲酸酯系樹脂、氰基丙烯酸酯系 樹脂、丙烯醯胺系樹脂等作爲接著劑成分之接著劑。形成 第一接著劑層之接著劑亦可爲與使偏光薄膜與相位差薄膜 • 接著所用之硬化性環氧樹脂組成物同樣之接著劑，亦可爲 不同接著劑。尤其，爲了可更減低接著劑層之厚度，較好 使用水系接著劑，亦即，將接著劑成分溶解於水中者或將 其分散於水中者。 至於水系接著劑，作爲接著劑成分，可舉例爲含有例 如聚乙烯醇系樹脂、水溶性交聯性環氧樹脂或胺基甲酸酯 系樹脂等者。至於聚乙烯醇系樹脂，可使用作爲水系接著 劑所使用之各種已知樹脂。 ® 至於水溶性交聯性環氧樹脂，可舉例爲例如對於使二 伸乙基三胺或三伸乙基四胺等之聚伸烷多胺與己二酸等之 二羧酸之反應所得之聚醯胺多胺，與表氯醇反應所得之聚 醯胺環氧樹脂。至於此種聚醯胺環氧樹脂之市售品，有由 住化 CHEMTEX(股）銷售之「SUMIREZU RESIN 650 j 、 「SUMIREZU RESIN 67 5」（均爲商品名）等》 使用水溶性交聯性環氧樹脂作爲黏著劑成分時，爲提 高塗佈性及接著性，較好進而混合聚乙烯醇系樹脂等之其 他水溶性樹脂。聚乙烯醇系樹脂除了部分皂化聚乙烯醇及 -35- 201007228 完全皂化聚乙烯醇以外，亦可爲羧基改質聚乙烯醇、乙醯 乙醯基改質之聚乙烯醇、羥甲基改質之聚乙烯醇、胺基改 質之聚乙烯醇等之經改質聚乙烯醇系樹脂》較佳爲使用乙 酸乙烯酯與不飽和羧酸或其鹽之共聚物的皂化物，即羧基 改質聚乙烯醇。又，此處所謂「羧基」包含- COOH及其 鹽之槪念。 市售之較佳羧基改質聚乙烯醇舉例有例如分別由 KURARAY(股）銷售之「KURARAY POVAL KL-506」、 _ 「KURARAY POVAL KL-318」、「KURARAY POVAL KL-1 18」，分別由日本合成化學工業（股）銷售之 「GOHSENOL T-3 3 0」、「GOHSENOL· T-350」，電氣化 學工業（股）銷售之「DR-0415」，分別由日本VAM &amp; POVAL(股）銷售之「AF-17」、「AT-17」、「AP-17」 等。 含有水溶性交聯性環氧樹脂之接著劑，可將上述環氧 樹脂及依據需要添加之聚乙烯醇系樹脂等之其他水溶性樹 參 脂溶解於水中調製成接著劑溶液。此情形，水溶性交聯性 環氧樹脂之含量’相對於水1 00重量份，較好爲〇 2〜2重 量份左右。又’調配聚乙烯醇系樹脂時，其調配量相對於 水100重量份’較好爲1〜10重量份左右，更好爲重 量份左右。 另一方面’於水系接著劑中可較佳使用之胺基甲酸酯 系樹脂，可舉例爲離子聚合物型胺基甲酸酯樹脂，尤其是 聚酯系離子聚合物型胺基甲酸酯樹脂。此處，所謂離子聚 -36- 201007228 合物型，係指在構成胺基甲酸酯樹脂之骨架內導入有少量 離子性成分（親水成分）者。又，所謂聚酯系離子聚合物型 胺基甲酸酯樹脂意指具有聚酯骨架之胺基甲酸酯樹脂，其 骨架內導入有少量離子性成分（親水成分）者。此種離子聚 合型胺基甲酸酯樹脂，由於不需使用乳化劑而可直接於水 中乳化形成乳液，故適合作爲水系接著劑。至於聚酯系離 子聚合型胺基甲酸酯樹脂之市售品，有例如大日本油墨化 ❹ 學工業（股）銷售之「HYDRAN AP-20」、「HYDRAN APX-101H」等，均以乳液形式獲得。 離子聚合物型之胺基甲酸酯樹脂作爲接著劑成分時， 較好進而添加異氰酸酯系等之交聯劑。異氰酸酯系交聯劑 爲分子內具有至少兩個異氰酸酯基（_NCO)之化合物。異氰 酸酯系交聯劑之例包含2,4-甲苯二異氰酸酯、伸苯基二異 氰酸酯、4，4’-二苯基甲烷二異氰酸酯、1,6-伸己基二異氰 酸酯、異佛爾酮二異氰酸酯等之聚異氰酸酯單體；聚異氰 • 酸酯單體之複數分子加成有三羥甲基丙烷等之多元醇之加 成物；二異氰酸酯3分子於各末端異氰酸酯基部分形成爲 異氰尿酸酯環之3官能基異氰尿酸酯體；以及二異氰酸酯 3分子於各末端異氰酸酯基部分經水合脫碳酸化形成之縮 脲體等之聚異氰酸酯改質體等。至於可較佳使用市售之異 氰酸酯系交聯劑，舉例有例如由大日本油墨化學工業（股） 銷售之「HYDRAN ASSISTERC-1」等。 於含有離子聚合物型胺基甲酸酯樹脂之水系接著劑 中’自黏度及接著劑之觀點觀之，該胺基甲酸酯樹脂較好 -37- 201007228 以其濃度成爲10〜70重量％左右之方式溶解或分散於水 中。離子聚合物型胺基甲酸酯樹脂之濃度更好爲20重量 %以上’又，更好爲50重量％以下，又，調配異氰酸酯系 交聯劑時，其調配量相對於胺基甲酸酯系樹脂100重量份 較好使以異氰酸酯系交聯劑成爲5〜100重量份左右之方式 適當選擇。 於使用上述水系接著劑時，偏光薄膜與透明保護薄膜 之接著’可藉由將該接著劑塗佈於透明保護薄膜及/或偏 @ 光薄膜之接著面上，使該兩者貼合而進行。更具體而言， 舉例有於偏光薄膜及/或透明保護薄膜上，藉由例如刮 板 '金屬線棒、模嘴塗佈器、卡馬塗佈器（camma coater)、凹版塗佈器等之塗佈方式均一塗佈水系接著劑之 後，於塗佈面重疊另一方薄膜藉由輥等貼合、乾燥之方法 等。乾燥可在例如60〜100°C左右之溫度進行。爲使黏著性 更高，較好於乾燥後，於比室溫高之溫度，例如在 30〜50 °C左右之溫度養生1〜10天左右。 © 以上所示之本實施形態之複合偏光板亦可於其相位差 薄膜之與偏光薄膜側相反側之面上設有黏著劑層。此黏著 劑層可較好地使用於與液晶胞等之其他構件貼合。又，通 常可於黏著劑層表面上，於貼合至該其他構件之前之期 間，設有用以保護表面之可剝離之隔離片。 [第二實施形態] 圖2爲顯示本發明之複合偏光板之層構成另一例之剖 -38- 201007228 面模式圖。圖2所示之複合偏光板2 00係在偏光薄膜101 之一面上透過接著劑層204層合有透明保護薄膜102,於 偏光薄膜101之另一面上透過黏著劑層20 5層合有相位差 薄膜103者。以下，對本實施形態之複合偏光板所具有之 接著劑層及黏著劑層詳細加以說明。偏光薄膜、透明保護 薄膜及相位差薄膜可使用如上述第一實施形態之複合偏光 板中所述同樣者。 (接著劑層） 接著劑層（圖2中之接著劑層204)爲用以使偏光薄膜 與透明保護薄膜接著之層。該等薄膜之接著所用之接著劑 (形成接著劑層之接著劑）並未特別限定，可舉例爲使用例 如聚乙烯醇系樹脂、環氧系樹脂、胺基甲酸酯系樹脂、氰 基丙烯酸酯系樹脂、丙烯醯胺系樹脂等作爲接著劑成分之 接著劑。尤其，爲了可更減低接著劑層之厚度，較好使用 水系黏著劑。至於水系接著劑，可使用如上述第一實施形 態之複合偏光板中所述同樣者。 又，作爲其他較佳之接著劑，可舉例爲無溶劑型接著 劑，具體而言爲藉由加熱或活性能量線之照射使單體或寡 聚物反應硬化形成接著劑層者。 所謂無溶劑接著劑爲實質上不含溶劑，一般係以含有 藉由加熱或活性能量線照射而聚合之硬化性化合物與聚合 起始劑而構成。自反應性之觀點而言，較好爲以陽離子硬 化者，最好使用環氧系之接著劑。 -39- 201007228 此接著劑更好爲藉由加熱或活性能量線照射之陽離子 聚合而硬化者，尤其，就耐候性或折射率等之觀點，較好 使用分子內不含芳香環之環氧化合物作爲硬化性化合物。 使用分子內不含芳香環之環氧化合物之接著劑記載於例如 特開2004-245925號公報。至於該等不含芳香環之環氧化 合物可例示爲芳香族環氧化合物之氫化物、脂環式環氧化 合物、脂肪族環氧化合物等。接著劑中使用之硬化性環氧 化合物通常於分子中具有2個以上之環氧基。 至於上述芳香族環氧化合物之氫化物、脂環式環氧化 合物、脂肪族環氧化合物，可分別使用上述第一實施形態 所述之氫化環氧樹脂、脂環式環氧樹脂、脂肪族環氧樹 脂。 至於脂環式環氧化合物之具體例可舉例如下述者。 3，4-環氧基環己烷羧酸3,4-環氧基環己基甲基酯、 3，4·環氧基-6-甲基環己烷羧酸3,4-環氧基-6-甲基環 己基甲基酯、 雙（3,4-環氧基環己烷羧酸）乙二酯、 己二酸雙（3,4-環氧基環己基甲基）酯、 己二酸雙（3,4-環氧基-6·甲基環己基甲基）酯、 二乙二醇雙（3,4-環氧基環己基甲基醚）、 乙二醇雙（3，4-環氧基環己基甲基醚）、 2,3,14，15-二環氧基-7,11,18,21-四氧雜三螺 [5.2.2.5.2.2]二——烷（又，亦可命名爲3,4-環氧基環己烷 螺·2’，6’-二噁烷螺-3 ”，5”-二噁烷螺-3’”，4’”-環氧基環己烷 201007228 之化合物）、 4-(3,4-環氧基環己基）-2,6-二氧雜-8，9-環氧基螺[5.5] 十一烷、 4 -乙烯基環己烯二氧化物、 雙-2,3-環氧基環戊基醚、 二環戊二烯二氧化物等。 使用環氧化合物之無溶劑型接著劑之其他構成（環氧 Φ 化合物之環氧當量、聚合起始劑之種類及其具體例，、聚合 起始劑之調配量、其他配合成分等）以及使用該接著劑使 透明保護薄膜與偏光薄膜貼合之方法，可與上述第一實施 形態所述之由含有環氧樹脂之硬化性環氧樹脂組成物所構 成之接著劑相同。 使用無溶劑型環氧系接著劑時，接著劑層厚度通常爲 50微米以下，較好爲20微米以下，更好爲10微米以 下，又通常爲1微米以上。 ❹ (黏著劑層） 接著劑層（圖2中之黏著劑層205)爲用以使偏光薄膜 與相位差薄膜接著之層。於本發明中，作爲構成該黏著劑 層之黏著劑，係使用在溫度80°C之貯存彈性率爲O.IMPa 以上，較好爲0.15MPa〜lOMPa之高彈性黏著劑。該高彈 性黏著劑於溫度23 °C之貯存彈性率較好爲O.IMPa以上， 更好爲0.2MPa〜lOMPa。貯存彈性率由於一般在越高溫度 條件下有變低之傾向，故若在溫度80 °C測定之材料的貯存 -41 - 201007228 彈性率爲0.1 MPa以上，則通常在溫度23 °c測定之相同材 料的貯存彈性率將顯示其以上之値。 所謂貯存彈性率（動態彈性率）意指一般所用之黏彈性 測定之用語者，而爲試料隨時間產生變化（振動）之變形或 應力，藉由測定因此發生之應力或變形而測定試料力學性 質之方法（動態黏彈性測定）而求得之値，變形區分爲應力 及同位相，對於應力之位相偏移90度之2成分波時，爲 處於振&gt;動應力及同位相之彈性率。貯存彈性率可使用市售 @ 黏彈性測定裝置，例如後述實施例所示之動態黏彈性測定 裝置（Dynamic Analyzer RDA II: REOMETRIC 股份有限公 司）予以測定。黏彈性測定裝置之溫度控制，可使用循環 恆溫槽、電加熱器、培替爾（Peltier)元件等之各種已知溫 度控制裝置，藉此設定測定時之溫度。 通常的圖像顯示裝置或其所適用之光學薄膜中所使用 之黏著劑，其貯存彈性率爲高如0.1 MPa左右，與此相 比，本發明所用之黏著劑之貯存彈性率成爲如上述般高的 參 値。藉由使用顯示如此高之貯存彈性率，亦即硬的黏著 劑，於置於高溫環境下時或於高溫環境與低溫環境反覆之 環境下之時可彌補凝集力不足，變得可較小地抑制伴隨著 此時所發生之偏光薄膜收縮之尺吋變化。亦即，本發明之 複合偏光板具有良好耐久性，尤其可抑制偏光薄膜與相位 差薄膜之剝離。 作爲高彈性黏著劑，可舉例有以例如丙烯酸系聚合 物、矽氧系聚合物、聚酯、聚胺基甲酸酯、聚醚等作爲基 -42- 201007228 礎聚合物者。其中，丙烯酸系聚合物中，較好選擇使用其 光學透明性優異、具有適度濡濕性或凝集力、與基材之接 著性亦優異、進而具有耐候性或耐熱性等、於加熱或加濕 條件下不產生浮起或剝落等之剝離問題者。丙烯酸系聚合 物中，具有甲基、乙基、丁基等之碳數20以下之烷基之 丙烯酸之烷基酯與由（甲基）丙烯酸或（甲基）丙烯酸羥基乙 酯等所構成之含有官能基之丙烯酸系單體，以使玻璃轉移 溫度較好成爲25 °C以下，進而較好成爲0°C以下之方式共 聚合之重量平均分子量爲10萬以上之丙烯酸系共聚物可 使用作爲基礎聚合物。 至於丙烯酸系基礎聚合物，並未特別限定，但可適當 地使用（甲基）丙烯酸丁酯、（甲基）丙烯酸乙酯、（甲基）丙 烯酸異辛酯、（甲基）丙烯酸2-乙基己酯等之（甲基）丙烯酸 酯系基礎聚合物，或該等之（甲基）丙烯酸酯以兩種類以上 使用之共聚合系基礎聚合物。又，該等基礎聚合物亦可爲 • 使極性單體共聚合者。作爲極性單體，舉例有（甲基）丙烯 酸、（甲基）丙烯酸2-羥基丙酯、（甲基）丙烯酸2-羥基乙 酯、（甲基）丙烯醯胺、（甲基）丙烯酸2-N，N-二甲基胺基乙 基酯、（甲基）丙烯酸縮水甘油酯等之具有羧基、羥基、醯 胺基、胺基、環氧基等之極性官能基之單體。 該等丙烯酸系聚合物可單獨作爲黏著劑而使用，亦可 於黏著劑中調配通常之交聯劑。作爲交聯劑，例示有2價 或多價金屬離子、與羧基之間形成羧酸金屬鹽者、多胺化 合物、與羧基間形成醯胺鍵者、聚環氧化合物或多元醇化 -43- 201007228 合物、與羧基之間形成酯鍵者、聚異氰酸酯化合物、與羧 基之間形成尿素鍵者等。其中聚異氰酸酯化合物已廣泛使 用作爲有機系交聯劑。 至於用以使形成黏著劑層之高彈性黏著劑之貯存彈性 率成爲較高之値之方法，並無特別限制，而可舉例爲例如 於上述黏著劑成分中調配寡聚物，具體而言爲調配胺基甲 酸酯丙烯酸酯系之寡聚物之方法。再者，對調配該等胺基 甲酸酯丙烯酸酯系寡聚物之黏著劑照射能量線而硬化之黏 著劑，由顯示較高貯存彈性率之觀點而言，爲較佳。調配 有胺基甲酸酯丙烯酸酯系寡聚物之黏著劑或者將該黏著劑 塗佈在支撐薄膜（隔離片）上以紫外線硬化之附有隔離片之 黏著劑爲已知者，可由黏著劑製造商獲得。 高彈性黏著劑中，除了上述基礎聚合物、交聯劑及聚 合物以外，依據需要，爲了調整黏著劑之黏著力、凝集 力、黏性、彈性率、玻璃轉移溫度等，亦可添加例如天然 或合成物之樹脂、黏著性賦予樹脂、抗氧化劑、紫外線吸 收劑、染料、顏料、消泡劑、腐飩抑制劑、光聚合起始劑 等之適當添加劑。至於紫外線吸收劑，舉例有水楊酸酯系 化合物、二苯甲酮系化合物、苯并三唑系化合物、氰基丙 烯酸酯系化合物及鎳錯鹽系化合物等。 又，作爲本發明中之高彈性黏著劑，可使用調配光擴 散劑之光擴散性黏著劑，光擴散劑只要爲與構成黏著劑層 之基礎聚合物之折射率不同之微粒子即可，而可使用由無 機化合物所構成之微粒子或由有機化合物（聚合物）構成之 201007228 微粒子。 至於由無機化合物所構成之微粒子，可舉例微例如氧 化鋁（折射率1.76)、氧化矽（折射率1.45)等。又’由有機 化合物（聚合物）所構成之微粒子可舉例微例如三聚氰胺珠 粒（折射率1.57)、聚甲基丙烯酸甲酯珠粒（折射率1.49)、 甲基丙烯酸甲酯/苯乙烯共聚物樹脂珠粒（折射率 1.50〜1.59)、聚碳酸酯珠粒（折射率1_55)、聚乙烯珠粒（折 φ 射率1.53)、聚苯乙烯珠粒（折射率1.6)、聚氯乙烯珠粒 (折射率1.46)、矽氧樹脂珠粒（折射率1.46)等。 包含上述丙烯酸系基礎聚合物而構成黏著劑層之基礎 聚合物由於大多顯示1.4左右之折射率，故於其中調配之 光擴散劑可選擇其折射率爲1~2左右之光擴散劑。構成黏 著劑層之基礎聚合物與光擴散劑之折射率差通常爲〇.〇1 以上，又由液晶顯示裝置之亮度及視覺辨識性之觀點而 言，較好爲〇.〇1以上〇_5以下。作爲光擴散劑使用之微 Ο 粒子係適當地使用球形者，較好亦爲趨近其單分散者，例 如平均粒徑在2-6微米左右之範圍的微粒子。 光擴散劑之調配量，係考慮調配有其之光擴散性黏著 劑層所必要之霧濁値或使用其之液晶顯示裝置之亮度等而 適當予以決定，一般，對於構成黏著劑層之基礎聚合物 1〇〇重量份，爲3~30重量份左右。 又，調配有光擴散劑之光擴散性黏著劑層，由利用有 使用其所得之複合偏光板之液晶顯示裝置可確保其亮度且 不易產生顯示像不清晰或遲鈍之觀點而言，其霧濁度較好 -45- 201007228 在20〜80 %之範圍。霧濁度係以JIS Κ 7105所規定之（擴散 透過率/全光線透過率）xl〇〇(%)所表示之値。 調配有光擴散劑之光擴散性黏著劑層等之黏著劑層的 厚度，雖依據其接著力而決定，但通常爲1〜40微米之範 圍。由保有良好加工性、顯示高的耐久性、又自正面觀看 液晶顯示裝置時或自斜面觀看時保有亮度、不易產生顯示 像不清晰或遲鈍之觀點而言，黏著劑層的厚度成爲3〜25 微米較佳。 (複合偏光板之製造方法） 本實施形態之複合偏光板之製造方法並無特別限制， 例如較好採用先使用上述接著劑使透明保護薄膜與偏光板 薄膜進行貼合，隨後，使用上述黏著劑於偏光薄膜之與透 明保護薄膜側相反側之面上貼合相位差薄膜之方法。偏光 薄膜與透明保護薄膜使用上述水系接著劑進行貼合之方法 並無特別限制，舉例爲例如於偏光薄膜或透明保護薄膜之 表面上均勻塗佈接著劑，於其塗佈面上重叠另一薄膜並藉 由輥等予以貼合並乾燥之方法。乾燥可在例如60-100 °C 左右之溫度進行。爲使接著性更提高，較好於乾燥後，在 比室溫略高之溫度，例如在30〜5 0 °C左右之溫度養生1〜10 天左右。 又，偏光薄膜與透明保護薄膜使用上述無溶劑型接著 劑進行貼合之方法亦無特別限制，舉例有例如於偏光薄膜 或透明保護薄膜表面上均勻塗佈接著劑，將其塗佈面上重 -46- 201007228 叠另一方薄膜並藉由輥等貼合，照射活性能量線或進行加 熱之方法。藉由照射活性能量線而硬化時，較好使用紫外 線。具體之紫外線光源，可舉例有低壓水銀燈、中壓水銀 燈、高壓水銀燈、黑光燈、金屬鹵素燈等。活性能量線例 如紫外線照射強度或照射量，只要在可使聚合起始劑充分 活性化且對於硬化後之接著劑層或偏光薄膜、透明保護薄 膜不產生不良影響下適當決定即可。又藉由加熱硬化時， 〇 可以一般已知之方法加熱，此時之溫度或時間，亦只要在 可使聚合起始劑充分活性化且對於硬化後之接著劑層或偏 光薄膜、透明保護薄膜不產生不良影響下適當決定即可。 由接著劑在單面上貼合有透明保護薄膜之偏光薄膜暫 時藉由捲取裝置捲取至氯乙烯管等之核心管上。藉由於單 面貼合透明保護薄膜之處置，即使捲取薄膜，亦不會有使 偏光薄膜開裂等之問題。在捲取之前，亦可在貼合有透明 保護薄膜之偏光薄膜之單面或兩面上，進而貼合可再剝離 • 之保護薄膜。接著，捲取至核心管上，將於單面上貼合有 透明保護薄膜之偏光薄膜，於其未貼合透明保護薄膜之面 上貼合有相位差薄膜。於此面上貼合上述之可再剝離之保 護薄膜時，該保護薄膜係在貼合相位差薄膜之前予以剝 離。 偏光薄膜與相位差薄膜使用上述高彈性黏著劑貼合之 方法並無特別限制，通常，先使偏光薄膜或相位差薄膜表 面形成有黏著劑層。該等黏著劑層可藉由於偏光薄膜或相 位差薄膜上塗佈以上述基礎聚合物爲主體之黏著劑溶液並 47- 201007228 乾燥之方法，或準備於施以離型處理之支持薄膜（隔離片） 之離型處理面上形成有黏著劑層者（附有隔離片之黏著 劑），將其以黏著劑層側貼合在偏光薄膜或相位差薄膜表 面上之方法形成。具體而言，可舉例爲例如，將黏著劑溶 解或分散於甲苯或乙酸乙酯等之有機溶劑中調製10〜40重 量％之黏著劑溶液，將其直接塗佈在偏光薄膜或相位差薄 膜表面上並乾燥而形成黏著劑層之方法。又，作爲其他方 法，可採用事先於隔離片上形成黏著劑層後，轉印於偏光 @ 薄膜或相位差薄膜上之方法。於如此形成之黏著劑層上， 亦可層合有由藉由矽氧系等之離型劑施以處理之樹脂薄膜 所構成之隔離片。 再者，於偏光薄膜或向位差薄膜表面上形成黏著劑層 時，依據需要，亦可施以用以提高偏光薄膜或相位差薄膜 之黏著劑層形成面之密著性之處理，例如電暈處理等。用 以提高密著性之處理，亦可施加在貼合於偏光薄膜或相位 差薄膜上之黏著劑層表面上。 @ 偏光薄膜與相位差薄膜之貼合係藉由以往已知之技術 進行。例如，藉由使用貼合輥等，以相位差薄膜之遲相軸 對於偏光薄膜之偏光透過軸成爲正交或平行之方式層合之 方法，或相位差薄膜之遲相軸對於偏光薄膜之偏光透過軸 成爲特定角度之方式貼合之方法而進行。 以上所示之本實施形態之複合偏光板，其相位差薄膜 之與偏光薄膜側相反側之面上亦可設有黏著劑層。此黏著 劑層可較好地使用於與液晶胞等之其他構件之貼合。複合 -48- 201007228 偏光板對於液晶胞之貼合，通常係以其相位差薄膜側面向 液晶胞之方式配置。 &lt;液晶顯示裝置&gt; 本發明之液晶顯示裝置具備有液晶胞以及配置在該液 晶胞單面或兩面上之上述本發明複合偏光板。圖3及圖4 爲顯示本發明之液晶顯示裝置之例之剖面模式圖，圖3顯 • 示於液晶胞兩面上配置上述第一實施形態之複合偏光板之 例，圖4顯示於液晶胞兩面上配置上述第二實施形態之複 合偏光板之例。圖3及圖4所示之液晶顯示裝置，具有具 備有下列之複合偏光板：液晶胞201、配置在該液晶胞 201下側之具備黏著劑層202b/相位差薄膜103/偏光薄膜 101/透明保護薄膜102之複合偏光板、配置在液晶胞201 上側之同樣具備黏著劑層202a/相位差薄膜103/偏光薄膜 101/透明保護薄膜102之複合偏光板。兩複合偏光板使用 • 分別配置在相位差薄膜1〇3側之黏著劑層202a、202b貼 合在液晶胞上。本發明之液晶顯示裝置於任一透明保護薄 膜102之外側具備有未圖示之背光。 如圖5所示，於圖3及圖4所示之液晶顯示裝置之液 晶胞之上側及下側分別配置之複合偏光板，係呈相位差薄 膜103之遲相軸302與偏光薄膜101之吸收軸303平行之 關係。又，係以下側之複合偏光板中偏光薄膜101其吸收 軸303與液晶胞201之長邊方向301正交、上側複合偏光 板中之偏光薄膜1〇1其吸收軸303與液晶胞201之長邊方 -49- 201007228 向301平行之構成。圖3及圖4所示之構成之液晶顯示裝 置於液晶胞於橫電場模式時特別有效。 本發明之液晶顯示裝置，如圖3及圖4所示，可於液 晶胞之兩面上配置本發明之複合偏光板之構成，亦可爲於 液晶胞單面上配置本發明之複合偏光板之構成。於後者之 情況，未配置本發明之複合偏光板之側，亦可配置其他偏 光板。 φ 實施例 以下列舉實施例更具體加以說明，但本發明不因該等 例而受到限制。該等例中，表示使用量或含量之「份」及 「％」若無特別限制係以重量爲基準。又，以下各例中， 貯存彈性率係以下列方法測定。 [貯存彈性率之測定方法] 黏著劑之貯存彈性率（G’）之測定係以下列進行：製作 參 由測定對象之黏著劑所構成之直徑8 mmx厚度lmm之圓柱 狀試驗片，使用動態黏彈性測定裝置（Dynamic Analyzer RDA II: REOMETRIC股份有限公司製），以頻率iHz之捻 斷法設爲初期變形1N，於溫度23°C或80°C之條件進行測 定。 又’以下實施例2〜3及比較例2〜3中使用下列作爲黏 著劑。 -50- 201007228 (黏著劑a :高彈性黏著劑） 黏著劑a爲於丙烯酸丁酯與丙烯酸之共聚物中調配有 胺基甲酸酯丙烯酸酯寡聚物進而添加有異氰酸酯係交聯劑 之黏著劑。黏著劑a之貯存彈性率以上述方法測定，於 23°C爲0.40MPa，於80°C爲0.18MPa。以下實施例中，作 爲黏著劑a，係藉由使用將含有上述成分之有機溶劑溶液 塗佈在施以離型處理之厚度38微米之聚對苯二甲酸乙二 φ 酯薄膜（隔離片）之離型處理面上並乾燥而獲得之在該隔離 片之表面上形成有厚度15微米之黏著劑a之層的附有隔 離片之薄片狀黏著劑。 (黏著劑b :低彈性黏著劑） 黏著劑b爲市售薄片狀黏著劑，並未調配胺基甲酸酯 丙烯酸酯寡聚物。黏著劑b之貯存彈性率以上述方法測 定，於23°〇爲0.05\^&amp;，於80°(：爲0.0 41^?&amp;。以下實施 • 例及比較例中，作爲黏著劑b，係使用在施以離型處理之 厚度38微米之聚對苯二甲酸乙二酯薄膜（隔離片）之離型 處理面上設有厚度15微米之黏著劑b之層的市售附有隔 離片之黏著劑。 (黏著劑c :低彈性黏著劑） 黏著劑e爲市售薄片狀黏著劑，並未調配胺基甲酸酯 丙烯酸酯寡聚物。黏著劑c之貯存彈性率以上述方法測 定，於23°(：爲0.101^?&amp;，於80°(：爲〇.〇4]^?&amp;。以下實施 -51 - 201007228 例及比較例中’作爲黏著劑C，係使用在施以離型處理之 厚度38微米之聚對苯二甲酸乙二酯薄膜（隔離片）之離型 處理面上設有厚度15微米之黏著劑c之層的市售附有隔 離片之黏著劑。 &lt;實施例1&gt; (a) 由硬化性環氧樹脂組成物所構成之接著劑a之調 製 將己二酸雙（3，4-環氧基環己基甲基）酯1〇〇份、氫化 雙酚A之二縮水甘油醚25份以及作爲光陽離子聚合起始 劑之4,4’-雙（二苯基磺醯基）二苯基硫醚雙（六氟磷酸鹽） 2.2份混合後，進行脫泡，獲得由硬化性環氧樹脂組成物 構成之接著劑A。又，光陽離子聚合起始劑係調配爲50% 碳酸丙烯酯溶液。 (b) 單面附有透明保護薄膜之偏光薄膜之製作 使由平均聚合度約2,400、皂化度99.9莫耳％以上之 聚乙烯醇構成之厚度75微米之聚乙烯醇薄膜，以乾式單 軸延伸約5倍，進而保持緊張狀態，於60°C純水中浸漬1 分鐘後，於碘/碘化鉀/水之重量比爲0.05/5/ 1 00之水溶液 中於28 °C浸漬60秒。隨後，於碘化鉀/硼酸/水之重量比 爲8.5/8.5/100之水溶液中於72 °C浸漬300秒。接著，以 26t純水洗淨20秒後，於65°C乾燥，獲得於聚乙烯醇樹 脂薄膜中吸附配向有碘之偏光薄膜。 於此偏光薄膜單面上，使用5重量％聚乙烯醇水溶液 201007228 作爲接著劑貼合在表面上施以皂化處理之厚度40微米之 三乙醯纖維素薄膜（透明保護薄膜），乾燥去除溶劑，作成 於單面上具有透明保護薄膜之偏光薄膜。 (c)相位差薄膜之貼合 使由降冰片烯系單體之開環聚合物之氫化物構成之降 冰片烯系樹脂薄膜[OPTES(股）製之「ZEONOR薄膜」]經 縱向單軸延伸之厚度80微米厚之薄膜作爲相位差薄膜前 φ 驅物。此薄膜之玻璃轉移溫度爲136 °C、光彈性係數爲 3.1xl0·12 m2/N、對波長5 90nm之光之面內相位差値爲 3 OOnm，厚度方向之相位差値爲1 45nm。於使單軸延伸薄 膜之兩面上，分別透過厚度25微米之丙烯酸系黏著劑層 貼合收縮薄膜（據丙烯系樹脂所構成之橫軸延伸倍率大於 縱軸延伸倍率之雙軸延伸薄膜（厚度60微米））。隨後，以 針銷張幅機保持薄膜之寬度方向，一邊依序通過175 °C±1 °C之空氣循環式恆溫烘箱及1 60°C ±1°C之空氣循環式恆溫 ® 烘箱，於寬度方向收縮成0.70倍。此時之長度方向之收 縮率爲0.92倍。隨後，將兩面上所貼之收縮性薄膜連同 黏著劑一起剝離，獲得由降冰片烯系樹脂所構成之相位差 薄膜。所得之相位差薄膜厚度爲107微米、對於波長 590nm之光的面內相位差値爲 241.9nm，Nz係數爲 0.49。 使上述相位差薄膜以照射量16.8k J/m2施以電暈處理 後，使用上述接著劑A貼合在附有上述透明保護薄膜之 偏光薄膜之偏光薄膜面上’以附有承載帶之紫外線照射裝 -53- 201007228 置（燈：Fusion D燈，累積光量1000 mJ/cm2)進行紫外線 照射，於室溫放置1小時，獲得本發明之複合偏光板。所 得之複合偏光板之外觀並無薄膜浮起或剝離、無氣泡等而 爲良好者。 所得複合偏光板之偏光薄膜與相位差薄膜之間的接著 力，藉由JIS K 6854-1:1999中規定之90度剝離試驗予以 評價。於90度剝離試驗中，剝離速度設爲200mm/分鐘， 作爲試驗片，使用將複合偏光板切成寬度2 5 mmx長度 120mm大小者。此試驗片使用薄片狀黏著劑[LINTEK(股） 製造之「P-3 132」（商品名）]固定於鈉玻璃上，使用島津 (股）製作所製之萬能試驗機（autograph)「AG-1」，於使相 位差薄膜與偏光薄膜之間剝離的方式進行試驗。其結果， 90度剝離強度爲如10N/25mm般之非常高之値。 〈比較例1 &gt; 除取代上述接著劑A，而使用由水1〇〇份、羧基改質 ❹ 之聚乙儲醇（由KURARAY(股）銷售之「KURARAY POVAL KL318」）3份以及水溶性聚醯胺環氧樹脂（住化 CHEMTEX(股）銷售之「SUMIREZU RESIN 650」）1.5 份 所構成之水系接著劑以外，以與實施例1同樣的方法，將 相位差薄膜接著於偏光薄膜上，製作複合偏光板。所得之 複合偏光板於剛製作後相位差薄膜與偏光薄膜之間即產生 剝離，無法製作90度剝離試驗用之試驗片，接著力弱。 -54- 201007228 &lt;實施例2 &gt; (a) 單面附有透明保護薄膜之偏光薄膜之製作 與實施例1同樣，獲得於單面上具有透明保護薄膜之 偏光薄膜。 (b) 相位差薄膜之貼合 與實施例1同樣，製作相位差薄膜。接著，對該相位 差薄膜以照射量16.8 k J/m2施以電暈處理後，使用由黏著 • 劑a所構成之附有隔離片之薄片狀黏著劑貼合在附有上述 透明保護薄膜之偏光薄膜之偏光薄膜面上，獲得本發明之 複合偏光板。所得之複合偏光板之外觀並無薄膜浮起或剝 離、無氣泡等而爲良好者》 所得複合偏光板之相位差薄膜面以黏著劑b固定於鈉 玻璃（作爲取代液晶胞而使用）上，在5(TC施以20分鐘之 高壓鍋處理使複合偏光板密著於玻璃板上。依此狀態，放 置於-35 °C氛圍中30分鐘，接著移至+85 °C氛圍中放置30 • 分鐘，以此作爲一循環，重複1〇〇次此循環進行熱衝擊試 驗。複合偏光板於試驗後亦未觀察到缺陷而仍維持良好狀 態。 &lt;實施例3&gt; (a)單面附有透明保護薄膜之偏光薄膜之製作 與實施例1同樣，獲得偏光薄膜。接著，於此偏光薄 膜之單面上，使用上述接著劑A貼合在表面上施以皂化 處理之厚度40微米之三乙醯纖維素薄膜（透明保護薄膜） -55- 201007228 後，以附有承載帶之紫外線照射裝置（燈：Fusion D燈， 累積光量1 000 mj/cm2)進行紫外線照射，於室溫放置1小 時，作成於單面上具有透明保護薄膜之偏光薄膜。 (b)相位差薄膜之貼合 與實施例1同樣，製作相位差薄膜。接著，對該相位 差薄膜以照射量16.8k J/m2施以電暈處理後，使用由黏著 劑a所構成之附有隔離片之薄片狀黏著劑貼合在附有上述 透明保護薄膜之偏光薄膜之偏光薄膜面上，獲得本發明之 q 複合偏光板。所得之複合偏光板之外觀並無薄膜浮起或剝 離、無氣泡等而爲良好者。 &lt;比較例2 &gt; 除使偏光薄膜與相位差薄膜貼合之黏著劑變更爲黏著 劑b以外，其他與實施例2同樣獲得複合偏光板。所得偏 光板之外觀並無薄膜浮起或剝離、無氣泡等而爲良好者。 所得複合偏光板之相位差薄膜面以黏著劑b固定於鈉 G 玻璃（作爲取代液晶胞而使用）上，在50°C施以20分鐘之 高壓鍋處理使複合偏光板密著於玻璃板上。依此狀態，放 置於-35 °C氛圍中30分鐘，接著移至+ 85 °C氛圍中放置30 分鐘’以此作爲一循環，重複50次此循環進行熱衝擊試 驗。複合偏光板於試驗後之相位差薄膜與玻璃之間之黏著 劑層中發生氣泡，並非足以實用者。 &lt;比較例3 &gt; -56- 201007228 除使偏光薄膜與相位差薄膜貼合之黏著劑變更爲黏著 劑c以外，其他與實施例2同樣獲得複合偏光板。所得偏 光板之外觀爲良好者。 所得複合偏光板之相位差薄膜面以黏著劑c固定於鈉 玻璃（作爲取代液晶胞而使用）上，在50°C施以20分鐘之 高壓鍋處理使複合偏光板密著於玻璃板上。依此狀態，放 置於-35 °C氛圍中30分鐘，接著移至+85 °C氛圍中放置30 φ 分鐘，以此作爲一循環，重複50次此循環進行熱衝擊試 驗。複合偏光板於試驗後之相位差薄膜與玻璃之間之黏著 劑層中發生氣泡，並非足以實用者。 此次揭示之實施形態及實施例全部所例示之方面不應 認爲係限制性。本發明之範圍不以上述說明限制而意指與 由申請專利範圍所揭示之申請專利範圍均等之意且意圖包 含於該範圍內之所有變化。 Φ [產業上之可能利用性] 本發明之複合偏光板，爲可廣泛利用作爲各種液晶顯 示裝置中之光學構件，例如，爲可利用作爲電視等大型液 晶顯示裝置或電腦用顯示器、汽車導航系統、行動電話、 攜帶式終端機等中使用之中小型液晶顯示裝置中之光學構 件。 【圖式簡單說明】 圖1爲顯示本發明之複合偏光板之層構成之一例之剖 -57- 201007228 面模式圖。 圖2爲顯示本發明之複合偏光板之層構成之另一例之 剖面模式圖。 圖3爲顯示本發明之液晶顯示裝置之一例之剖面模式 圖。 圖4爲顯示本發明之液晶顯示裝置之另一例之剖面模 式圖。 圖5係用以說明圖3及圖4中所示之液晶顯示裝置中 軸角度關係之斜視圖。 【主要元件符號說明】 1 00, 200 :複合偏光板 1〇1 :偏光薄膜 102 :透明保護薄膜 103 :相位差薄膜 104 :第一接著劑層 105 :第二黏著劑層 2 0 1 :液晶胞 202a, 202b, 205 ：黏著劑層 204 :接著劑層 301:液晶胞長邊方向 3 02 :相位差薄膜之遲相軸 3 03:偏光薄膜之吸收軸 -58-(wherein R18 represents a hydrogen atom or a linear group having a carbon number of 1 to 5). The alicyclic epoxy resin of the above-mentioned alicyclic epoxy resin is preferably used because it is commercially available or is analogous to it, and is easily obtained. (A) 7-oxabicyclo[4. 1. 0] Gengyuan-3-decanoic acid with (7_oxabicyclo) [4. 1. 0]Heptan-3-yl) ester of methanol or the like [in the formula (1), a compound of r1=r2 = h] (B) 4-methyl-7-oxabicyclo[4. 1. 0] heptane-3-decanoic acid and (4-methyl-7-oxabicyclo[4. 1. 0]Heptan-3-yl)methanol ester compound [in the formula (1), Ri=4_CH3 'R2 = 4-CH3 compound] (C) 7-oxabicyclo[4. 1. 0] an ester of heptane-3-carboxylic acid with 1,2-ethanediol [in the formula (II), R3 = R4 = H, n = 2 compound] (D) (7-oxabicyclo[ 4. 1. 0]hept-3 _yl) ester of methanol with adipic acid [in the formula (III), R5 = R6 = H, p = 4 of the compound] (E) (4-methyl-7-oxabicyclo[ 4. 1. 0]hept-3-yl) ester of methanol with adipic acid [in the formula (III), R5=4-CH3 'R6 = 4-CH3, p = 4 compound] (F) (7-oxabicyclo [4. 1. 0]Heptan-3-yl) ester of methanol and 1,2-ethanediol [in the formula (V), R9 = R1Q = H, compound of formula = 2] Further, as an aliphatic epoxy resin For example, an aliphatic polyol or a polyglycidyl ether of an alkylene oxide adduct thereof, -26-201007228. More specifically, diglycidyl ether of 1,4-butanediol; diglycidyl ether of 1,6-hexanediol; triglycidyl ether of glycerol; triglycidyl ether of trimethylolpropane; ; diglycidyl ether of polyethylene glycol; diglycidyl ether of propylene glycol; and addition of one or two or more alkylene oxides (ethylene oxide or the like) to an aliphatic polyol such as ethylene glycol, propylene glycol or glycerin A polyglycidyl ether of a polyether polyol obtained by propylene oxide or the like. In the present invention, the epoxy resin may be used alone or in combination of two or more. The epoxy equivalent of the epoxy resin used in the present invention is usually in the range of 30 to 3,000 g/eq, preferably 50 to 1,500 g/eq. When the epoxy equivalent is less than 30 g/eq, the flexibility of the composite polarizing plate after hardening is lowered, and the strength is lowered. On the other hand, when it exceeds 30,000 g/eq, there is a possibility that the compatibility with other components contained in the adhesive is lowered. In the present invention, from the viewpoint of reactivity, cationic polymerization is preferably used as the hardening reaction of the epoxy resin. For this reason, the curable epoxy resin composition of the adhesive preferably contains a cationic polymerization initiator. The cationic polymerization initiator generates a cationic species or a Lewis acid by irradiation or heating of an active energy ray of visible light, ultraviolet rays, X-rays, electron beams or the like, and initiates polymerization of an epoxy group. Although any type of cationic polymerization initiator can be used, it is preferable to impart potential from the viewpoint of workability. Hereinafter, a cationic polymerization initiator which generates a cationic species or a Lewis acid by irradiation with an active energy ray and initiates polymerization of an epoxy group is referred to as a "photocationic polymerization initiator", and a cation is generated by heat. The cationic polymerization initiator which is a species or Lewis acid, -27- 201007228 and which initiates the polymerization of an epoxy group is called a "thermal cationic polymerization initiator". The photo-cationic polymerization initiator is used to harden the adhesive by irradiation of the active energy ray, and it is possible to harden at room temperature, and the retardation film is reduced for the case where deformation due to heat resistance or expansion of the polarizing film must be considered. It is advantageous in terms of being in good agreement with the polarizing film. Further, since the photocationic polymerization initiator is subjected to a catalytic action by light, it is mixed in an epoxy resin, and the adhesive is excellent in storage stability and workability. The photocationic polymerization initiator is not particularly limited, and examples thereof include an anion salt such as an aromatic diazo salt, an aromatic iodine salt, an aromatic onium salt, and an iron-aromatic complex. As the aromatic diazo gun salt, for example, benzenediazonium hexafluoroantimonate, benzene diazo gun hexafluorophosphate, benzenediazonium hexafluoroborate or the like can be exemplified. As the aromatic iodine salt, for example, diphenyl iodide (pentafluorophenyl) borate, diphenyl iodine hexafluorophosphate, diphenyl iodine hexafluoroantimonate, di(4-anthracene) Phenyl phenyl) iodine gun hexafluorophosphate. As the aromatic phosphonium salt, for example, triphenylsulfonium hexafluorophosphate, triphenylsulfonium hexafluoroantimonate, triphenylsulfonium (pentafluorophenyl) borate, 4,4'-bis(diphenyl) Disulfonyl)diphenyl sulfide bis(hexafluorophosphate), 4,4,·bis[bis(;S-hydroxyethoxy)benzenesulfonyl]diphenyl sulfide bis(hexafluoroantimony) Acid salt), 4,4,-bis[bis(indolyl-hydroxyethoxy)benzenesulfonyl]diphenyl sulfide bis(hexafluorophosphate), 7-[di(p-tolyl) Sulfhydryl]-2-isopropylthioketal hexafluorocatelate, 7-[bis(p-tolylhydrazyl)sulfonyl]-2-isopropylthiaxanone 201007228 (pentafluorophenyl) Borate, 4-phenylcarbonyl-4'-diphenylsulfonyl-diphenyl sulfide hexafluorophosphate, 4-(p-tert-butylphenylcarbonyl)-4'-diphenyl sulfonate Mercapto-diphenyl sulfide hexafluoroantimonate, 4-(p-t-butylphenylcarbonyl)-4'-bis(p-tolylhydrazyl)sulfonyl-diphenyl sulfide oxime ( Pentafluorophenyl) borate, and the like. The iron-aromatic complex is exemplified by, for example, xylene-cyclopentadienyl iron (II) hexafluoroantimonate, cumene cyclopentadienyl iron (II) hexafluorophosphate, and two φ toluene-ring. Pentadienyl iron (II)- gin (trifluoromethylsulfonyl) methide or the like. Commercial products of such photo-cationic polymerization initiators are easily available, and for example, each of them is sold under the trade names "KAYARAD PCI-220" and "KAYARAD PCI-620" (the above is manufactured by Sakamoto Chemical Co., Ltd.). "UVI-6990" (manufactured by United Carbon Chemical Co., Ltd.), "ADEKA OPTOMER SP-150", "ADEKA OPTOMER SP-170" (above, ADEKA (share) system), "CI-5102", "CIT-1370", "CIT-1682", "CIP-1866S", "CIP-2048S", "CIP-2064S" (above is φ Japan Soda (share) system), "DPI-101", "DPI-102", "DPI- 103", "DPI-105", "MPI-103", "MPI-105", "BBI-101", "BBI-102", "BBI-103", "BBI-105"' "TPS-101" , "TPS-102", "TPS-103", "TPS-105", "MDS-103", "MDS-105", "DTS-102", "DTS-103" (above is Green Chemicals) System), "PI-2074" (made by RHODIA Corporation). These photocationic polymerization initiators may each be used singly or in combination of one or more kinds. Among these, especially the aromatic onium salt, since -29-201007228 has ultraviolet absorption characteristics in the wavelength range of 300 nm or more, it is possible to obtain a cured product having excellent hardenability and good mechanical strength and adhesion strength, so that it is preferable. Use. The amount of the photocationic polymerization initiator is usually 0. 5 to 20 parts by weight, preferably 1 part by weight or more, more preferably 15 parts by weight or less. The amount of the photocationic polymerization initiator is 0.1% by weight relative to the epoxy resin. When the amount is 5 parts by weight, the hardenability is insufficient, and the mechanical strength or the subsequent strength tends to decrease. In addition, when the amount of the cation polymerization initiator is more than 20 parts by weight based on 100 parts by weight of the epoxy resin, the oxidizing substance in the cured product is increased in hygroscopicity, and the composite is polarized. The possibility of reduced durability of the board. When a photocationic polymerization initiator is used, the curable epoxy resin composition of the adhesive may further contain a photosensitizer as needed. The use of a photosensitizer enhances the reactivity of the cationic polymerization and increases the mechanical strength and subsequent strength of the cured product. Examples of the photosensitizer include, for example, a carbonyl compound, an organic sulfonated compound, a persulfide compound, a redox compound, an azo and a diazo compound, a halogen compound, and a photoreductive dye. More specific examples of the photosensitizer include benzoin derivatives such as benzoin methyl ether, benzoin propyl ether, and dimethoxy-α-phenylacetophenone; benzophenone, 2, 4-Dichlorobenzophenone, methyl o-benzhydrylbenzoate, 4,4'-bis(dimethylamino)benzophenone, 4,4'-bis(diethylamino) a benzophenone derivative such as benzophenone: a thioxanthone derivative such as 2-chlorothioxanthone or 2-isopropylthioxanthone; 2. a chloranil, a 2-methylhydrazine or the like Anthracene derivative; Ν-methyl acridone, Ν--30- 201007228 an acridone derivative such as butyl acridone; and α,α-diethoxyacetophenone, benzyl, anthrone, Xanthone, uranyl compound, halogen compound. However, it is not limited to these. These photosensitizers may be used singly or in combination of one or more kinds. The light sensitizer is preferably contained in an amount of from 〇1 to 20 parts by weight based on 100 parts by weight of the curable epoxy resin composition. As the thermal cationic polymerization initiator, there may be mentioned, for example, a benzyl sulfonium salt, a thiophene φ ΐ key salt, a thiurium salt, a sulfhydryl salt, a shady steep salt, a hydrazinium salt, a carboxylic acid ester, a sulfonate. Acid esters and amine guanamines. Commercially available products of the thermal cationic polymerization initiators can be easily obtained, for example, "ADEKA OPTOMER CP77" and "ADEKA OPTOMER CP66" (the above are manufactured by ADEKA Co., Ltd.) and "CI-2639", respectively, by the trade names. , "CI-2624" (above is Japan Soda (share) system), "SUN AID SI-60L", "SUN AID SI-80L", "SUN AID SI-100L" (above is Sanxin Chemical Industry Co., Ltd.) System) and so on. • The epoxy resin contained in the subsequent agent may be hardened by either photocationic polymerization or thermal cationic polymerization, or may be hardened by both photocationic polymerization and thermal cationic polymerization. In the latter case, it is preferred to use a photocationic polymerization initiator and a thermal cationic polymerization initiator. The curable epoxy resin composition may further contain a compound which promotes cationic polymerization such as oxetane or polyol. The oxetane is a compound having a 4-membered cyclic ether in the molecule. Examples of oxetanes include 3-ethyl-3-hydroxymethyloxetane and 1,4-bis[(3-ethyl-3-oxetanyl)methoxymethyl Benzene, 3-ethyl-3-(phenoxy-31 - 201007228 methyl) oxetane, bis[(3-ethyl-3-oxetanyl)methyl]ether, 3- Ethyl-3·(2-ethylcyclohexyloxymethyl)oxetane, phenol novolac oxetane. Commercial products of such oxetane can be easily obtained, for example, "ARON ΟΧΕΤΑΝΕ ΟΧΤ-101", "ARON ΟΧΕΤΑΝΕ ΟΧΤ-121", and "ARON ΟΧΕΤΑΝΕ ΟΧΤ-21 1", respectively, by the trade names. "ARON ΟΧΕΤΑΝΕ ΟΧΤ-22 1", "ARON ΟΧΕΤΑΝΕ ΟΧΤ-212" (above is Yadong Synthetic Co., Ltd.). The oxetane is usually contained in the curable epoxy resin composition in an amount of from 0.5 to 95% by weight, preferably from 30 to 70% by weight. The polyhydric alcohol is preferably one which does not have an acidic base other than a phenolic hydroxyl group. Examples of the polyhydric alcohols include, for example, a polyol compound having no functional group other than a hydroxyl group, a polyester polyol compound, a polycaprolactone polyol compound, a polyol compound having a phenolic hydroxyl group, and a polycarbonate polyol. Wait. The molecular weight of the polyols is usually 48 or more, preferably 62 or more, more preferably 100 or more, and preferably 1 or less. The polyhydric alcohol is usually contained in the curable epoxy resin composition in an amount of 50% by weight or less, preferably @30% by weight or less. Further, the curable epoxy resin composition may contain other additives such as an ion scavenger, an antioxidant, a chain transfer agent, a sensitizer, an adhesion-imparting agent, a thermoplastic resin, a chelating agent, and a flow as long as the effects of the present invention are not impaired. Regulators, plasticizers, defoamers, etc. Examples of the ion scavenger include inorganic compounds such as powdered lanthanum, lanthanide, magnesium, aluminum, calcium, and titanium, and mixtures thereof. As the antioxidant, for example, a hindered phenol-based antioxidant or the like is exemplified. -32- 201007228 An adhesive composed of a curable epoxy resin composition containing an epoxy resin as described above may be applied to the adhesion surface of the polarizing film or the retardation film, or may be applied to the bonding surface of the both. After the upper layer is bonded to the surface of the adhesive, the uncured adhesive layer is cured by irradiation of the active energy ray or by heating, whereby the polarizing film and the retardation film are transmitted through the curable epoxy resin. The second adhesive layer composed of the cured layer of the composition is bonded. The coating method of the subsequent agent is not particularly limited, and various coating methods such as a doctor blade, a gold wire bar, a die coater, a camma coater, and a gravure coater can be used. An adhesive containing the epoxy resin used in the subsequent step of the polarizing film and the retardation film can basically use a solventless adhesive which does not substantially contain a solvent component, but is suitable for each coating method. The viscosity range, in order to adjust the viscosity, may also contain a solvent in the adhesive. As the solvent, those which do not lower the optical properties of the polarizing film and which dissolve the epoxy resin composition are preferably used. The solvent is not particularly limited, and examples thereof include an organic solvent such as a hydrocarbon represented by toluene and an ester represented by ethyl acetate. When the adhesive is hardened by irradiation of an active energy ray, the light source to be used is not particularly limited, and for example, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or a chemical fluorescing having a light-emitting distribution having a wavelength of 400 nm or less can be used. Lights, black lights, microwave activated mercury lamps, metal halide lamps, etc. The light irradiation intensity of the curable epoxy resin composition may vary depending on the composition, but the irradiation intensity in the wavelength field effective for the activation of the photocationic polymerization initiator is preferably 0. A range of 1 to 100 mW/cm2. -33- 201007228 The light intensity of the hardening epoxy resin composition is less than 0. When the temperature is 1 mW/cm2, the reaction time is too long. If it exceeds 100 mW/cm2, the radiant heat from the lamp and the heat generated during the polymerization of the curable epoxy resin composition may cause yellowing of the curable epoxy resin composition. Or the polarizing film is deteriorated. The light irradiation time of the curable epoxy resin composition is not particularly limited as long as it is controlled for each composition, but it is preferably set such that the cumulative light amount expressed by the product of the irradiation intensity and the irradiation time becomes 1 〇 5,000 mJ/cm2. If the cumulative light amount of the curable epoxy resin composition is less than 10 _ mJ/cm2, the active species derived from the photocationic polymerization initiator may be insufficiently generated, and there is a possibility that the adhesive hardening is insufficient. Further, if the accumulated light amount exceeds 5,000 mJ/cm2, the installation time is extremely long, which is disadvantageous in terms of productivity. When the curing agent is hardened by heat, it can be heated by a generally known method, and the conditions and the like are not particularly limited, but usually the cation polymerization initiator which is added to the curable epoxy resin composition is cation-produced. The temperature of the species or the Lewis acid is heated above, specifically, the heating temperature is .  For example, 50~2 0 0 °C or so. When curing under the irradiation of an active energy ray or heating under any condition, it is also preferable not to combine the polarization degree, the light transmittance, the hue of the polarizing film, the transparency of the transparent protective film, and the phase difference characteristics of the retardation film. Hardening in the range in which the functions of the polarizing plate are reduced. The thickness of the second adhesive layer composed of the curable epoxy resin composition is usually 50 μm or less, preferably 20 μm or less, and more preferably 10 μm or less. -34- 201007228 (first adhesive layer) The first adhesive layer is a layer for bonding the polarizing film and the transparent protective film. The adhesive (the adhesive for forming the first adhesive layer) to be used in the film is not particularly limited, and examples thereof include a polyvinyl alcohol resin, an epoxy resin, a urethane resin, and cyanide. A acrylate-based resin, an acrylamide-based resin or the like is used as an adhesive for the adhesive component. The adhesive for forming the first adhesive layer may be the same adhesive as the curable epoxy resin composition used for the polarizing film and the retardation film, or may be a different adhesive. In particular, in order to further reduce the thickness of the adhesive layer, it is preferred to use a water-based adhesive, that is, a person who dissolves the adhesive component in water or disperses it in water. The water-based adhesive agent may, for example, be a polyvinyl alcohol-based resin, a water-soluble crosslinkable epoxy resin or a urethane-based resin. As the polyvinyl alcohol-based resin, various known resins used as a water-based adhesive can be used. As the water-soluble crosslinkable epoxy resin, for example, a polymerization obtained by reacting a polyalkylene polyamine such as di-ethyltriamine or tri-extended ethyltetramine with a dicarboxylic acid such as adipic acid A polyamide amine, a polyamide amine epoxy resin obtained by reacting with epichlorohydrin. As a commercial product of such a polyamide resin, "SUMIREZU RESIN 650 j" and "SUMIREZU RESIN 67 5" (both trade names), which are sold by Sumitomo CHEMTEX Co., Ltd., use a water-soluble crosslinkable ring. When the oxygen resin is used as the adhesive component, it is preferable to further mix other water-soluble resins such as polyvinyl alcohol-based resins in order to improve coatability and adhesion. In addition to partially saponified polyvinyl alcohol and -35-201007228 fully saponified polyvinyl alcohol, the polyvinyl alcohol-based resin may also be a carboxy-modified polyvinyl alcohol, an ethylene-ethyl hydrazide-modified polyvinyl alcohol, or a hydroxymethyl group. The modified polyvinyl alcohol-based resin such as polyvinyl alcohol or an amine-modified polyvinyl alcohol is preferably a saponified product of a copolymer of vinyl acetate and an unsaturated carboxylic acid or a salt thereof, that is, a carboxyl group-modified product. Polyvinyl alcohol. Here, the "carboxy group" herein includes the concept of -COOH and its salt. Commercially available preferred carboxy-modified polyvinyl alcohols are exemplified by "KURARAY POVAL KL-506", _ "KURARAY POVAL KL-318", and "KURARAY POVAL KL-1 18", respectively, which are sold by KURARAY Co., Ltd., respectively. "GOHSENOL T-3 3 0", "GOHSENOL T-350" sold by Japan Synthetic Chemical Industry Co., Ltd., "DR-0415" sold by Electrochemical Industry (shares), respectively, by VAM &amp; POVAL (Japan) Sales of "AF-17", "AT-17", "AP-17", etc. The adhesive containing a water-soluble crosslinkable epoxy resin can be dissolved in water to prepare an adhesive solution by dissolving the above-mentioned epoxy resin and other water-soluble resin such as a polyvinyl alcohol-based resin to be added. In this case, the content of the water-soluble crosslinkable epoxy resin is preferably about 2 to 2 parts by weight based on 100 parts by weight of water. Further, when the polyvinyl alcohol-based resin is blended, the amount thereof is preferably from about 1 to 10 parts by weight, more preferably about a part by weight, based on 100 parts by weight of water. On the other hand, a urethane-based resin which can be preferably used in an aqueous binder can be exemplified by an ionic polymer type urethane resin, especially a polyester-based ionic polymer type urethane. Resin. Here, the ion-polymerization type -36-201007228 is a type in which a small amount of an ionic component (hydrophilic component) is introduced into a skeleton constituting the urethane resin. In addition, the polyester-based ionic polymer urethane resin means a urethane resin having a polyester skeleton, and a small amount of an ionic component (hydrophilic component) is introduced into the skeleton. Such an ion-polymeric urethane resin is suitable as a water-based adhesive because it can be directly emulsified in water to form an emulsion without using an emulsifier. As for the commercial products of the polyester-based ionic polymerization type urethane resin, for example, "HYDRAN AP-20" and "HYDRAN APX-101H", which are sold by Dainippon Ink and Chemical Industry Co., Ltd., are all emulsions. Form obtained. When the urethane type urethane resin is used as the adhesive component, a crosslinking agent such as an isocyanate group is preferably further added. The isocyanate crosslinking agent is a compound having at least two isocyanate groups (_NCO) in the molecule. Examples of the isocyanate crosslinking agent include 2,4-toluene diisocyanate, phenyl diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,6-extended hexyl diisocyanate, isophorone diisocyanate, and the like. a polyisocyanate monomer; a complex molecule of a polyisocyanate ester monomer is added to an adduct of a polyol such as trimethylolpropane; and a diisocyanate 3 molecule is formed as an isocyanurate at each terminal isocyanate group. a trifunctional isocyanurate body of a ring; and a polyisocyanate modified body such as a uret formed by hydration decarbonation of each of the terminal isocyanate group parts of the diisocyanate group. As the commercially available isocyanate-based crosslinking agent, for example, "HYDRAN ASSISTERC-1" sold by Dainippon Ink Chemical Industry Co., Ltd., and the like are exemplified. In the aqueous binder containing an ionic polymer type urethane resin, the urethane resin preferably has a concentration of from 10 to 70% by weight from the viewpoint of self-adhesion and an adhesive. Dissolve or disperse in water in a left-right manner. The concentration of the ionic polymer type urethane resin is more preferably 20% by weight or more, and more preferably 50% by weight or less. Further, when the isocyanate crosslinking agent is blended, the amount is adjusted relative to the urethane. 100 parts by weight of the resin is preferably selected so as to be about 5 to 100 parts by weight based on the isocyanate crosslinking agent. When the water-based adhesive is used, the polarizing film and the transparent protective film may be applied by applying the adhesive to the adhesive film and/or the surface of the transparent film, and bonding the two together. . More specifically, it is exemplified on a polarizing film and/or a transparent protective film by, for example, a squeegee 'metal bar, a die coater, a camma coater, a gravure coater, etc. The coating method is a method in which the water-based adhesive is applied uniformly, and the other film is laminated on the coated surface by a roll or the like, dried, or the like. Drying can be carried out, for example, at a temperature of about 60 to 100 °C. In order to make the adhesion higher, it is better to maintain the temperature at a temperature higher than room temperature, for example, at a temperature of about 30 to 50 ° C for about 1 to 10 days after drying. The composite polarizing plate of the present embodiment shown above may be provided with an adhesive layer on the surface of the retardation film opposite to the side of the polarizing film. This adhesive layer can be preferably used for bonding to other members such as liquid crystal cells. Further, a peelable spacer for protecting the surface is usually provided on the surface of the adhesive layer before being attached to the other member. [Second Embodiment] Fig. 2 is a cross-sectional view showing another embodiment of the layer configuration of the composite polarizing plate of the present invention, in the range of -38 to 201007228. The composite polarizing plate 200 shown in FIG. 2 has a transparent protective film 102 laminated on one surface of the polarizing film 101 through the adhesive layer 204, and a phase difference is formed on the other surface of the polarizing film 101 through the adhesive layer 20 5 . Film 103. Hereinafter, the adhesive layer and the adhesive layer of the composite polarizing plate of the present embodiment will be described in detail. The polarizing film, the transparent protective film, and the retardation film can be the same as those described in the composite polarizing plate of the first embodiment described above. (Binder Layer) The subsequent layer (the adhesive layer 204 in Fig. 2) is a layer for bonding the polarizing film and the transparent protective film. The adhesive used in the film (the adhesive for forming the adhesive layer) is not particularly limited, and for example, a polyvinyl alcohol resin, an epoxy resin, a urethane resin, or a cyanoacrylate can be used. An ester resin, an acrylamide resin, or the like is used as an adhesive for the adhesive component. In particular, in order to further reduce the thickness of the adhesive layer, a water-based adhesive is preferably used. As the water-based adhesive, the same one as described in the composite polarizing plate of the first embodiment described above can be used. Further, as another preferable adhesive agent, a solventless type of adhesive can be exemplified, specifically, a monomer or an oligomer is reacted and hardened by heating or irradiation with an active energy ray to form an adhesive layer. The solventless adhesive is substantially free of a solvent, and is generally composed of a curable compound which is polymerized by heating or irradiation with an active energy ray and a polymerization initiator. From the viewpoint of reactivity, it is preferred to use an epoxy-based adhesive, preferably in the case of cationic hardening. -39- 201007228 The adhesive is preferably cured by cationic polymerization by heating or active energy ray irradiation, and in particular, in view of weather resistance, refractive index, etc., it is preferred to use an epoxy compound having no aromatic ring in the molecule. As a curable compound. An adhesive which uses an epoxy compound which does not contain an aromatic ring in the molecule is described in, for example, JP-A-2004-245925. The epoxidized ring containing no aromatic ring can be exemplified by a hydride of an aromatic epoxy compound, an alicyclic epoxide, an aliphatic epoxy compound or the like. The curable epoxy compound used in the subsequent agent usually has two or more epoxy groups in the molecule. As the hydrogenated product of the aromatic epoxy compound, the alicyclic epoxy compound, and the aliphatic epoxy compound, the hydrogenated epoxy resin, the alicyclic epoxy resin, and the aliphatic ring described in the above first embodiment can be used. Oxygen resin. Specific examples of the alicyclic epoxy compound include the following. 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylic acid, 3,4-epoxy-6-methylcyclohexanecarboxylic acid 3,4-epoxy- 6-methylcyclohexylmethyl ester, bis(3,4-epoxycyclohexanecarboxylic acid) ethylene diester, bis(3,4-epoxycyclohexylmethyl) adipate, hexane Acid bis(3,4-epoxy-6.methylcyclohexylmethyl) ester, diethylene glycol bis(3,4-epoxycyclohexylmethyl ether), ethylene glycol double (3,4 -Epoxycyclohexylmethyl ether), 2,3,14,15-diepoxy-7,11,18,21-tetraoxaspiro[5. 2. 2. 5. 2. 2] Di-alkane (also, may also be named 3,4-epoxycyclohexane snail 2',6'-dioxanespiro-3", 5"-dioxane snail-3'" , 4'"-epoxycyclohexane 201007228 compound), 4-(3,4-epoxycyclohexyl)-2,6-dioxa-8,9-epoxy snail [5. 5] undecane, 4-vinylcyclohexene dioxide, bis-2,3-epoxycyclopentyl ether, dicyclopentadiene dioxide, and the like. Other configuration of the solventless adhesive using an epoxy compound (epoxy equivalent of the epoxy Φ compound, type of polymerization initiator, specific examples thereof, amount of polymerization initiator, other compounding components, etc.) and use The method of bonding the transparent protective film and the polarizing film to the adhesive may be the same as the adhesive comprising the epoxy resin-containing curable epoxy resin composition according to the first embodiment. When a solventless epoxy-based adhesive is used, the thickness of the adhesive layer is usually 50 μm or less, preferably 20 μm or less, more preferably 10 μm or less, and usually 1 μm or more. ❹ (Adhesive layer) The adhesive layer (adhesive layer 205 in Fig. 2) is a layer for bonding the polarizing film and the retardation film. In the present invention, as the adhesive constituting the adhesive layer, the storage elastic modulus at a temperature of 80 ° C is used. Above IMPa, preferably 0. High elastic adhesive of 15MPa~lOMPa. The storage elastic modulus of the high elastic adhesive at a temperature of 23 ° C is preferably O. Above IMPa, better 0. 2MPa~lOMPa. The storage modulus is generally low at higher temperatures, so if the material is measured at a temperature of 80 °C, the elastic modulus is 0. Above 1 MPa, the storage modulus of the same material, usually measured at a temperature of 23 °c, will show above. The storage elastic modulus (dynamic elastic modulus) means the term of the viscoelasticity measurement generally used, and the deformation or stress of the sample (vibration) changes with time, and the mechanical properties of the sample are determined by measuring the stress or deformation thus occurring. According to the method (dynamic viscoelasticity measurement), the deformation is divided into stress and the isophase, and when the phase of the stress is shifted by 90 degrees, the elastic modulus of the vibration stress and the isotropic phase is obtained. The storage modulus can be measured using a commercially available viscoelasticity measuring device such as a dynamic viscoelasticity measuring device (Dynamic Analyzer RDA II: REOMETRIC Co., Ltd.) as shown in the examples below. The temperature control of the viscoelasticity measuring device can be performed by using various known temperature control devices such as a circulating thermostat, an electric heater, and a Peltier element, thereby setting the temperature at the time of measurement. The adhesive used in a conventional image display device or an optical film to which it is applied has a storage elastic modulus as high as 0. The storage elastic modulus of the adhesive used in the present invention is as high as above as compared with the above. By using such a high storage modulus, that is, a hard adhesive, it can compensate for insufficient cohesive force when placed in a high-temperature environment or in an environment where the high-temperature environment and the low-temperature environment are repeated, and can be made smaller. The change in the scale accompanying the contraction of the polarizing film occurring at this time is suppressed. That is, the composite polarizing plate of the present invention has good durability, and in particular, it can suppress peeling of the polarizing film and the retardation film. As the highly elastic adhesive, for example, an acrylic polymer, a fluorene polymer, a polyester, a polyurethane, a polyether or the like can be exemplified as the base polymer -42-201007228. Among them, the acrylic polymer is preferably selected from the group consisting of excellent optical transparency, moderate wettability or cohesive force, excellent adhesion to a substrate, and weather resistance or heat resistance, and heating or humidifying conditions. There is no problem of peeling off such as floating or peeling. In the acrylic polymer, an alkyl ester of acrylic acid having an alkyl group having 20 or less carbon atoms such as a methyl group, an ethyl group or a butyl group, and a (meth)acrylic acid or hydroxyethyl (meth)acrylate are used. The acrylic-based monomer having a functional group may be used as an acrylic copolymer having a weight-average molecular weight of 100,000 or more, preferably having a glass transition temperature of 25 ° C or less, and further preferably 0 ° C or less. Base polymer. The acrylic base polymer is not particularly limited, but butyl (meth)acrylate, ethyl (meth)acrylate, isooctyl (meth)acrylate, 2-ethyl (meth)acrylate may be suitably used. A (meth) acrylate based base polymer such as hexyl hexyl ester or a copolymerized base polymer used in two or more types of these (meth) acrylates. Further, the base polymers may also be: • a copolymer of polar monomers. As the polar monomer, for example, (meth)acrylic acid, 2-hydroxypropyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, (meth)acrylamide, (meth)acrylic acid 2- A monomer having a polar functional group such as a carboxyl group, a hydroxyl group, a decylamino group, an amine group or an epoxy group, such as N,N-dimethylaminoethyl ester or glycidyl (meth)acrylate. These acrylic polymers can be used singly as an adhesive, and a usual crosslinking agent can be formulated in the adhesive. Examples of the crosslinking agent include a divalent or polyvalent metal ion, a metal carboxylate group formed between a carboxyl group, a polyamine compound, a guanamine bond with a carboxyl group, a polyepoxide or a polyolization-43-201007228 The compound, the ester bond formed between the carboxyl group, the polyisocyanate compound, and the urea bond formed between the carboxyl group and the like. Among them, polyisocyanate compounds have been widely used as organic crosslinking agents. The method for making the storage modulus of the high-elasticity adhesive forming the adhesive layer higher is not particularly limited, and for example, an oligomer can be formulated, for example, in the above-mentioned adhesive component, specifically A method of formulating a urethane acrylate-based oligomer. Further, it is preferred from the viewpoint of exhibiting a high storage modulus of elasticity that the adhesive for curing the adhesive of the urethane acrylate-based oligomer is irradiated with an energy ray. An adhesive prepared with an urethane acrylate oligomer or an adhesive having a spacer attached to the support film (spacer) and cured by ultraviolet rays is known as an adhesive. Manufacturers get. In the high-elasticity adhesive, in addition to the above-mentioned base polymer, crosslinking agent, and polymer, in order to adjust the adhesion, cohesive force, viscosity, elastic modulus, glass transition temperature, etc. of the adhesive, for example, natural additives may be added. Or a suitable additive such as a resin of a composition, an adhesive imparting resin, an antioxidant, an ultraviolet absorber, a dye, a pigment, an antifoaming agent, a rotatory inhibitor, a photopolymerization initiator, or the like. Examples of the ultraviolet absorber include a salicylate-based compound, a benzophenone-based compound, a benzotriazole-based compound, a cyanoacrylate-based compound, and a nickel-salted salt-based compound. Further, as the high-elasticity adhesive of the present invention, a light-diffusing adhesive which is formulated with a light-diffusing agent may be used, and the light-diffusing agent may be any particle having a refractive index different from that of the base polymer constituting the adhesive layer. A 201007228 microparticle composed of a microparticle composed of an inorganic compound or an organic compound (polymer) is used. As the fine particles composed of inorganic compounds, for example, aluminum oxide (refractive index of 1. 76), yttrium oxide (refractive index 1. 45) Wait. Further, the microparticles composed of an organic compound (polymer) can be exemplified by micro melamine beads (refractive index 1. 57), polymethyl methacrylate beads (refractive index 1. 49), methyl methacrylate / styrene copolymer resin beads (refractive index 1. 50~1. 59), polycarbonate beads (refractive index 1_55), polyethylene beads (folding φ rate 1. 53), polystyrene beads (refractive index 1. 6), polyvinyl chloride beads (refractive index 1. 46), epoxy resin beads (refractive index 1. 46) Wait. The base polymer comprising the above acrylic base polymer to form an adhesive layer is mostly shown as 1. The refractive index of about 4, so the light diffusing agent blended therein can select a light diffusing agent having a refractive index of about 1~2. The refractive index difference between the base polymer and the light diffusing agent constituting the adhesive layer is usually 〇. 〇1 or more, and from the viewpoint of brightness and visual recognition of the liquid crystal display device, it is preferably 〇. 〇1 or more 〇5 or less. The micro ruthenium particles used as the light diffusing agent are suitably spherical, and preferably also those which are monodisperse, for example, fine particles having an average particle diameter of about 2 to 6 μm. The amount of the light diffusing agent is appropriately determined in consideration of the haze turbidity necessary for the light diffusing adhesive layer to be blended or the brightness of the liquid crystal display device using the same, and generally, the base polymerization constituting the adhesive layer The weight of the material is about 3 to 30 parts by weight. Further, a light diffusing adhesive layer having a light diffusing agent is used, and the liquid crystal display device using the composite polarizing plate obtained by using the same can ensure the brightness thereof and is less likely to cause unclear or sluggish display images. The degree is better -45- 201007228 in the range of 20~80%. The haze is expressed by JIS Κ 7105 (diffusion transmittance / total light transmittance) x l 〇〇 (%). The thickness of the adhesive layer such as the light diffusing adhesive layer to which the light diffusing agent is blended is determined depending on the adhesive force, but is usually in the range of 1 to 40 μm. The thickness of the adhesive layer is 3 to 25 from the viewpoints of maintaining good processability, exhibiting high durability, maintaining the brightness when viewing the liquid crystal display device from the front or when viewing from the inclined surface, and being less likely to cause unclear or sluggish display. Micron is preferred. (Manufacturing Method of Composite Polarizing Plate) The method for producing the composite polarizing plate of the present embodiment is not particularly limited. For example, it is preferred to use a bonding agent to bond the transparent protective film and the polarizing film, and then use the above adhesive. A method of bonding a retardation film to a surface of the polarizing film opposite to the side of the transparent protective film. The method of bonding the polarizing film and the transparent protective film using the above-mentioned water-based adhesive is not particularly limited. For example, the adhesive is uniformly applied to the surface of the polarizing film or the transparent protective film, and another film is superposed on the coated surface. And the method of sticking and drying by a roller or the like. Drying can be carried out at a temperature of, for example, about 60 to 100 °C. In order to improve the adhesion, it is preferred to maintain the temperature at a temperature slightly higher than room temperature, for example, at a temperature of about 30 to 50 ° C for about 1 to 10 days after drying. Further, the method of bonding the polarizing film and the transparent protective film to the transparent solvent-free adhesive is not particularly limited. For example, the adhesive is uniformly applied to the surface of the polarizing film or the transparent protective film, and the coated surface is heavy. -46- 201007228 A method of laminating another film and bonding it by a roller or the like, irradiating an active energy ray or heating it. When curing by irradiation with an active energy ray, it is preferred to use an ultraviolet ray. Specific examples of the ultraviolet light source include a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, a black light lamp, and a metal halide lamp. The active energy ray, for example, the ultraviolet ray irradiation intensity or the irradiation amount may be appropriately determined as long as the polymerization initiator can be sufficiently activated and does not adversely affect the adhesive layer or the polarizing film or the transparent protective film after curing. Further, when it is hardened by heat, the crucible can be heated by a generally known method, and the temperature or time at this time is also as long as the polymerization initiator can be sufficiently activated and the adhesive layer or the polarizing film or the transparent protective film is not cured. It is sufficient to make an appropriate decision under adverse effects. The polarizing film in which the transparent protective film is bonded to the single surface by the adhesive is temporarily taken up to the core tube of the vinyl chloride tube or the like by a winding device. By the treatment of the single-sided transparent protective film, even if the film is taken up, there is no problem that the polarizing film is cracked or the like. Before the winding, the protective film of the re-peelable film may be bonded to one side or both sides of the polarizing film to which the transparent protective film is attached. Then, it is taken up to the core tube, and a polarizing film of a transparent protective film is attached to one surface, and a retardation film is bonded to the surface of the transparent protective film. When the above-mentioned re-peelable protective film is bonded to the surface, the protective film is peeled off before the retardation film is bonded. The method of bonding the polarizing film and the retardation film to the above-mentioned high-elasticity adhesive is not particularly limited. Usually, an adhesive layer is formed on the surface of the polarizing film or the retardation film. The adhesive layer may be coated by a polarizing film or a retardation film coated with the above-mentioned base polymer as an adhesive solution and dried by 47-201007228, or a support film prepared for release treatment (separator) The adhesive layer formed on the release treatment surface (adhesive with a separator) is formed by adhering the adhesive layer side to the surface of the polarizing film or the retardation film. Specifically, for example, an adhesive may be dissolved or dispersed in an organic solvent such as toluene or ethyl acetate to prepare an adhesive solution of 10 to 40% by weight, which is directly coated on the surface of the polarizing film or the retardation film. A method of forming an adhesive layer by drying and drying. Further, as another method, a method of forming an adhesive layer on a spacer and transferring it to a polarizing film or a retardation film may be employed. On the adhesive layer thus formed, a separator composed of a resin film treated by a release agent such as an oxygen-based system may be laminated. Further, when an adhesive layer is formed on the surface of the polarizing film or the parallax film, if necessary, a treatment for improving the adhesion of the adhesive layer forming surface of the polarizing film or the retardation film may be applied, for example, electricity. Halo treatment, etc. The treatment for improving the adhesion can also be applied to the surface of the adhesive layer adhered to the polarizing film or the retardation film. The bonding of the polarizing film and the retardation film is carried out by a conventionally known technique. For example, by using a bonding roller or the like, the retardation axis of the retardation film is laminated in such a manner that the polarization transmission axis of the polarizing film is orthogonal or parallel, or the retardation axis of the retardation film is polarized for the polarizing film. It is carried out by a method in which the shaft is bonded to a specific angle. In the composite polarizing plate of the present embodiment shown above, an adhesive layer may be provided on the surface of the retardation film opposite to the side of the polarizing film. This adhesive layer can be preferably used for bonding to other members such as liquid crystal cells. Composite -48- 201007228 The bonding of the polarizing plate to the liquid crystal cell is usually arranged such that the side of the film is retarded toward the liquid crystal cell. &lt;Liquid Crystal Display Device&gt; The liquid crystal display device of the present invention comprises a liquid crystal cell and the above-described composite polarizing plate of the present invention disposed on one or both sides of the liquid crystal cell. 3 and 4 are schematic cross-sectional views showing an example of a liquid crystal display device of the present invention, and Fig. 3 shows an example in which the composite polarizing plate of the first embodiment is disposed on both sides of a liquid crystal cell, and Fig. 4 is shown on both sides of the liquid crystal cell. An example of the composite polarizing plate of the second embodiment described above is disposed. The liquid crystal display device shown in FIG. 3 and FIG. 4 has a composite polarizing plate comprising: a liquid crystal cell 201, an adhesive layer 202b disposed on the lower side of the liquid crystal cell 201, a retardation film 103, a polarizing film 101, and a transparent film. The composite polarizing plate of the protective film 102 and the composite polarizing plate having the adhesive layer 202a/phase difference film 103/polarizing film 101/transparent protective film 102 are disposed on the upper side of the liquid crystal cell 201. Two composite polarizing plates are used. • Adhesive layers 202a and 202b disposed on the side of the retardation film 1〇3 are attached to the liquid crystal cell. The liquid crystal display device of the present invention is provided with a backlight (not shown) on the outer side of any of the transparent protective films 102. As shown in FIG. 5, the composite polarizing plate disposed on the upper side and the lower side of the liquid crystal cell of the liquid crystal display device shown in FIG. 3 and FIG. 4 is the absorption of the retardation axis 302 of the retardation film 103 and the polarizing film 101. The relationship of the axes 303 is parallel. Further, in the composite polarizing plate of the lower side, the absorption film 303 is orthogonal to the longitudinal direction 301 of the liquid crystal cell 201, and the polarizing film 1〇1 of the upper composite polarizing plate has the absorption axis 303 and the length of the liquid crystal cell 201. Side side -49- 201007228 The composition of 301 parallel. The liquid crystal display of the configuration shown in Figs. 3 and 4 is particularly effective when the liquid crystal cell is in the lateral electric field mode. As shown in FIG. 3 and FIG. 4, the liquid crystal display device of the present invention may be configured such that the composite polarizing plate of the present invention is disposed on both sides of the liquid crystal cell, or the composite polarizing plate of the present invention may be disposed on one surface of the liquid crystal cell. Composition. In the latter case, the side of the composite polarizing plate of the present invention is not disposed, and other polarizing plates may be disposed. φ EXAMPLES Hereinafter, the examples are more specifically described, but the present invention is not limited by the examples. In the examples, the "parts" and "%" indicating the amount or content used are based on weight. Further, in the following examples, the storage modulus was measured by the following method. [Method for Measuring Storage Elasticity] The storage elastic modulus (G') of the adhesive is measured by making a cylindrical test piece having a diameter of 8 mmx and a thickness of 1 mm, which is composed of an adhesive to be measured, using a dynamic adhesive. The elastic measuring device (Dynamic Analyzer RDA II: manufactured by REOMETRIC Co., Ltd.) was measured at a temperature of 23 ° C or 80 ° C under the conditions of a frequency of 1 Hz and an initial deformation of 1 N. Further, the following Examples 2 to 3 and Comparative Examples 2 to 3 used the following as an adhesive. -50- 201007228 (Adhesive agent a: high-elasticity adhesive) Adhesive agent a is an adhesive of urethane acrylate oligomer and an isocyanate-based crosslinking agent in a copolymer of butyl acrylate and acrylic acid. Agent. The storage modulus of the adhesive a was measured by the above method and was 0.40 MPa at 23 ° C and 0.18 MPa at 80 ° C. In the following examples, as the adhesive a, a solution of an organic solvent containing the above components was applied to a polyethylene terephthalate film (separator) having a thickness of 38 μm which was subjected to a release treatment. A separator-attached sheet-like adhesive having a layer of adhesive a having a thickness of 15 μm formed on the surface of the separator was obtained by drying on a release-treated surface. (Adhesive agent b: low-elasticity adhesive) Adhesive agent b is a commercially available flaky adhesive, and no urethane acrylate oligomer is formulated. The storage modulus of the adhesive b was measured by the above method, and was 0.05% at 23° ,, and was at 80° (: 0.041^?). In the following examples and comparative examples, as the adhesive b, A commercially available separator having a layer of adhesive b having a thickness of 15 μm on a release treatment surface of a polyethylene terephthalate film (separator) having a thickness of 38 μm subjected to a release treatment is used. Adhesive (adhesive c: low-elasticity adhesive) Adhesive agent e is a commercially available flaky adhesive, and no urethane acrylate oligomer is formulated. The storage modulus of the adhesive c is determined by the above method. , at 23° (: is 0.101^?&amp;, at 80° (: is 〇.〇4]^?&amp;. The following implementation -51 - 201007228 and the comparative example 'as adhesive C, used in the application A commercially available separator-attached adhesive having a thickness of 15 μm of the adhesive c was provided on the release treatment surface of the polyethylene terephthalate film (separator) having a thickness of 38 μm which was subjected to release treatment. &lt;Example 1&gt; (a) Preparation of a binder a composed of a curable epoxy resin composition A bis(3,4-epoxycyclohexylmethyl) adipate ester was hydrogenated and hydrogenated. 25 parts of bisphenol A diglycidyl ether and 2.2 parts of 4,4'-bis(diphenylsulfonyl)diphenyl sulfide bis(hexafluorophosphate) as a photocationic polymerization initiator Defoaming was carried out to obtain an adhesive A composed of a curable epoxy resin composition. Further, the photocationic polymerization initiator was formulated into a 50% propylene carbonate solution. (b) Preparation of a polarizing film with a transparent protective film on one side, a polyvinyl alcohol film having a thickness of 75 μm, which is composed of polyvinyl alcohol having an average polymerization degree of about 2,400 and a degree of saponification of 99.9 mol% or more, which is dry uniaxially stretched. After about 5 times, it was kept in a state of tension. After immersing in pure water at 60 ° C for 1 minute, it was immersed in an aqueous solution of iodine/potassium iodide/water in a weight ratio of 0.05/5/100 at 28 ° C for 60 seconds. Subsequently, it was immersed at 72 ° C for 300 seconds in an aqueous solution of potassium iodide / boric acid / water in a weight ratio of 8.5 / 8.5 / 100. Subsequently, the mixture was washed with 26 t of pure water for 20 seconds, and then dried at 65 ° C to obtain a polarizing film in which an iodine was adsorbed and adsorbed on a polyvinyl alcohol resin film. On the single side of the polarizing film, a saponified 40-micron-thick triethylene cellulose film (transparent protective film) was applied to the surface by using a 5% by weight aqueous solution of polyvinyl alcohol 201007228 as an adhesive, and the solvent was removed by drying. A polarizing film having a transparent protective film on one side is formed. (c) lamination of a retardation film, a norbornene-based resin film composed of a hydride of a ring-opening polymer of a norbornene-based monomer ["ZEONOR film" manufactured by OPTES Co., Ltd.] is longitudinally uniaxially stretched The film having a thickness of 80 μm is used as the front φ drive of the retardation film. The film has a glass transition temperature of 136 ° C, a photoelastic coefficient of 3.1 x 10 12 m 2 /N, an in-plane phase difference 値 of 30,000 nm for light having a wavelength of 5 90 nm, and a phase difference 値 of 145 nm in the thickness direction. On both sides of the uniaxially stretched film, a shrink film is adhered through an acrylic adhesive layer having a thickness of 25 μm (a biaxially stretched film having a horizontal axis stretching ratio greater than a longitudinal axis stretching ratio by the acryl resin) (thickness 60) Micron)). Subsequently, the needle width grinder is used to maintain the width direction of the film, and sequentially pass through an air circulating constant temperature oven at 175 °C ± 1 °C and an air circulating constant temperature oven at 1 60 ° C ± 1 ° C in width. The direction shrinks to 0.70 times. At this time, the shrinkage ratio in the longitudinal direction was 0.92 times. Subsequently, the shrinkable film attached to both sides was peeled off together with the adhesive to obtain a retardation film composed of a norbornene-based resin. The resulting retardation film had a thickness of 107 μm, an in-plane phase difference 値 of 241.9 nm for light having a wavelength of 590 nm, and an Nz coefficient of 0.49. After the retardation film is subjected to corona treatment at an irradiation amount of 16.8 kJ/m 2 , the above-mentioned adhesive A is attached to the surface of the polarizing film of the polarizing film with the above transparent protective film. Irradiation-53-201007228 (lamp: Fusion D lamp, cumulative light amount: 1000 mJ/cm2) was irradiated with ultraviolet rays, and allowed to stand at room temperature for 1 hour to obtain a composite polarizing plate of the present invention. The appearance of the composite polarizing plate obtained is not good in that the film floats or peels off, and there is no bubble or the like. The adhesion between the polarizing film of the obtained composite polarizing plate and the retardation film was evaluated by a 90-degree peeling test specified in JIS K 6854-1:1999. In the 90-degree peeling test, the peeling speed was set to 200 mm/min, and as a test piece, the composite polarizing plate was cut into a width of 2 5 mm x a length of 120 mm. This test piece was fixed on a soda glass using a sheet-like adhesive [P-3 132 (trade name) manufactured by LINTEK Co., Ltd.), and an autograph "AG-1" manufactured by Shimadzu Corporation was used. The test was carried out in such a manner that the retardation film and the polarizing film were peeled off. As a result, the 90-degree peel strength is as high as 10 N/25 mm. <Comparative Example 1 &gt; In addition to the above-mentioned adhesive A, three parts of a polyethyl alcohol (a "KURARAY POVAL KL318" sold by KURARAY Co., Ltd.) having a water content of 〇〇 and a carboxy modified hydrazine were used, and water-soluble. A phase difference film was attached to the polarizing film in the same manner as in Example 1 except that the water-based adhesive consisting of 1.5 parts of the polyacetamide epoxy resin ("SUMIREZU RESIN 650" sold by CHEMTEX Co., Ltd.) was used. Make a composite polarizer. The obtained composite polarizing plate was peeled off immediately after the production of the retardation film and the polarizing film, and the test piece for the 90-degree peeling test could not be produced, and the force was weak. -54- 201007228 &lt;Example 2&gt; (a) Production of a polarizing film having a transparent protective film on one side A polarizing film having a transparent protective film on one surface was obtained in the same manner as in Example 1. (b) Bonding of retardation film A retardation film was produced in the same manner as in Example 1. Then, the retardation film was subjected to corona treatment at an irradiation amount of 16.8 kJ/m2, and then bonded to the transparent protective film with a sheet-like adhesive having a separator formed of an adhesive agent a. On the surface of the polarizing film of the polarizing film, the composite polarizing plate of the present invention is obtained. The appearance of the obtained composite polarizing plate is not such that the film floats or peels off, and there is no bubble, etc., and the phase difference film surface of the composite polarizing plate obtained is fixed to the soda glass (used as a substitute liquid crystal cell) with the adhesive b. The composite polarizer was adhered to the glass plate at 5 (TC applied for 20 minutes). In this state, it was placed in an atmosphere of -35 ° C for 30 minutes, and then moved to +85 ° C for 30 minutes. As a cycle, the thermal shock test was repeated one cycle after the cycle. The composite polarizer did not observe defects after the test and remained in a good state. &lt;Example 3&gt; (a) Production of a polarizing film having a transparent protective film on one side A polarizing film was obtained in the same manner as in Example 1. Next, on the single side of the polarizing film, the above-mentioned adhesive A was applied to the surface of a 40-micron thick triacetyl cellulose film (transparent protective film) -55-201007228 which was saponified on the surface. The ultraviolet irradiation device (light: Fusion D lamp, cumulative light amount: 1 000 mj/cm 2 ) of the carrier tape was irradiated with ultraviolet rays, and left at room temperature for 1 hour to prepare a polarizing film having a transparent protective film on one side. (b) Bonding of retardation film A retardation film was produced in the same manner as in Example 1. Then, the retardation film was subjected to corona treatment at an irradiation amount of 16.8 kJ/m 2 , and then bonded to the polarizing film with the above-mentioned transparent protective film using a sheet-like adhesive comprising a separator composed of an adhesive a. On the polarizing film side of the film, the q-composite polarizing plate of the present invention was obtained. The appearance of the obtained composite polarizing plate is excellent in that the film does not float or peel off, and there is no bubble or the like. &lt;Comparative Example 2&gt; A composite polarizing plate was obtained in the same manner as in Example 2 except that the adhesive to which the polarizing film and the retardation film were bonded was changed to the adhesive b. The appearance of the obtained polarizing plate is excellent in that the film does not float or peel off, and there is no bubble or the like. The retardation film surface of the obtained composite polarizing plate was fixed on a sodium G glass (used as a substitute liquid crystal cell) with an adhesive b, and subjected to a pressure cooker at 50 ° C for 20 minutes to adhere the composite polarizing plate to the glass plate. In this state, it was placed in an atmosphere of -35 ° C for 30 minutes, and then moved to an atmosphere of + 85 ° C for 30 minutes. As a cycle, the cycle was repeated 50 times for a thermal shock test. It is not sufficient for the composite polarizer to generate bubbles in the adhesive layer between the retardation film and the glass after the test. &lt;Comparative Example 3&gt; -56-201007228 A composite polarizing plate was obtained in the same manner as in Example 2 except that the adhesive to which the polarizing film and the retardation film were bonded was changed to the adhesive c. The appearance of the obtained polarizing plate was good. The retardation film surface of the obtained composite polarizing plate was fixed on a soda glass (used as a substitute liquid crystal cell) with an adhesive c, and subjected to a pressure cooker at 50 ° C for 20 minutes to adhere the composite polarizing plate to the glass plate. In this state, it was placed in an atmosphere of -35 ° C for 30 minutes, and then placed in an atmosphere of +85 ° C for 30 φ minutes as a cycle, and this cycle was repeated 50 times for a thermal shock test. It is not sufficient for the composite polarizer to generate bubbles in the adhesive layer between the retardation film and the glass after the test. The embodiments of the present disclosure and all aspects of the examples are not to be considered as limiting. The scope of the present invention is defined by the scope of the invention, and is intended to be in the scope of the invention. Φ [Industrial Applicability] The composite polarizing plate of the present invention can be widely used as an optical member in various liquid crystal display devices, and can be used as, for example, a large liquid crystal display device such as a television or a computer display or a car navigation system. Optical components in small and medium-sized liquid crystal display devices are used in mobile phones, mobile terminals, and the like. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an example of a layer configuration of a composite polarizing plate of the present invention. Fig. 2 is a schematic cross-sectional view showing another example of the layer constitution of the composite polarizing plate of the present invention. Fig. 3 is a schematic cross-sectional view showing an example of a liquid crystal display device of the present invention. Fig. 4 is a cross-sectional view showing another example of the liquid crystal display device of the present invention. Fig. 5 is a perspective view for explaining the relationship of the axial angles of the liquid crystal display devices shown in Figs. 3 and 4; [Main component symbol description] 1 00, 200: composite polarizing plate 1〇1: polarizing film 102: transparent protective film 103: retardation film 104: first adhesive layer 105: second adhesive layer 2 0 1 : liquid crystal cell 202a, 202b, 205: Adhesive layer 204: Adhesive layer 301: Liquid crystal cell longitudinal direction 3 02: retardation film of retardation film 3 03: Absorption axis of polarizing film - 58-

Claims (1)

201007228 七、申請專利範圍 1. 一種複合偏光板，係具備： 偏光薄膜， 透過第一接著劑層層合於前述偏光薄膜之一面上之透 明保護薄膜，及 透過第二接著劑層層合於前述偏光薄膜之另一面上之 相位差薄膜的複合偏光板，其特徵爲： φ 前述相位差薄膜其面內之遲相軸方向、面內進相軸方 向及厚度方向之折射率分別設爲nx、ny及nz，厚度設爲 d(nm)時，對於波長590nm之光滿足下述式（1)及（2)之由 烯烴系樹脂構成之薄膜， 前述第二接著劑層爲由含有藉由活性能量線照射或加 熱硬化之環氧樹脂之環氧樹脂組成物之硬化物層所構成’ 1 5 Onm ^ (nx-ny) χ d ^ 3 OOnm (1) 0.2 S (nx-nz)/(nx-ny) S 0.6 (2)。 • 2.如申請專利範圍第1項之複合偏光板，其中前述 環氧樹脂之分子內具有一個以上之鍵結於脂環式環上之環 氧基。 3. 如申請專利範圍第1項之複合偏光板，其中前述 烯烴系樹脂爲主要含有由脂環式烯烴衍生之構成單位之樹 脂。 4. 如申請專利範圍第1項之複合偏光板，其中前述 相位差薄膜之厚度爲20〜300μιη。 5. —種液晶顯示裝置，其特徵係具備液晶胞及配置 -59- 201007228 在前述液晶胞之單面或兩面之申請專利範圍第1項之複合 偏光板。 6. —種複合偏光板，係具備： 偏光薄膜， 透過接著劑層層合於前述偏光薄膜之一面上之透明保 護薄膜， 透過黏著劑層層合於前述偏光薄膜之另一面上之相位 差薄膜之複合偏光板，其特徵爲： @ 前述相位差薄膜其面內之遲相軸方向、面內進相軸方 向及厚度方向之折射率分別設爲nx、ny及nz，厚度設爲 d(nm)時，對於波長5 90nm之光滿足下述式（1)及（2)之由 烯烴系樹脂構成之薄膜， 前述黏著劑層係由在8(TC之溫度下顯示O.IMPa以上 之貯存彈性率之高彈性黏著劑所構成， 1 5 Onm ^ (nx-ny) χ d ^ 3 OOnm (1) 0.2^ (nx-nz)/(nx-ny) ^0.6 (2)。 ❹ 7. 如申請專利範圍第6項之複合偏光板，其中前述 烯烴系樹脂爲主要含有由脂環式烯烴衍生之構成單位之樹 脂。 8. 如申請專利範圍第6項之複合偏光板，其中前述 相位差薄膜之厚度爲20〜3 00μιη。 9. 如申請專利範圍第6項之複合偏光板，其中前述 黏著劑層之厚度爲1〜40μπι。 10. —種液晶顯示裝置，其特徵爲具備液晶胞及配置 -60- 201007228 在前述液晶胞之單面或兩面上之申請專利範圍第6項之複 合偏光板。201007228 VII. Patent application scope 1. A composite polarizing plate comprising: a polarizing film, a transparent protective film laminated on one surface of the polarizing film through a first adhesive layer, and laminated to the foregoing through a second adhesive layer A composite polarizing plate of a retardation film on the other surface of the polarizing film is characterized in that: φ the retardation film in the plane has an in-plane retardation axis direction, an in-plane phase axis direction, and a thickness direction refractive index of nx, respectively. When ny and nz have a thickness of d (nm), a film made of an olefin-based resin of the following formulas (1) and (2) is satisfied for light having a wavelength of 590 nm, and the second adhesive layer is made to contain active The hardened layer of the epoxy resin composition of the energy ray or heat-hardened epoxy resin constitutes ' 15 Onm ^ (nx-ny) χ d ^ 3 OOnm (1) 0.2 S (nx-nz)/(nx -ny) S 0.6 (2). 2. The composite polarizing plate of claim 1, wherein the epoxy resin has one or more epoxy groups bonded to the alicyclic ring. 3. The composite polarizing plate of claim 1, wherein the olefin-based resin is a resin mainly comprising a constituent unit derived from an alicyclic olefin. 4. The composite polarizing plate of claim 1, wherein the retardation film has a thickness of 20 to 300 μm. A liquid crystal display device comprising a liquid crystal cell and a composite polarizing plate of the first application of the above-mentioned liquid crystal cell on the one or both sides of the above-mentioned liquid crystal cell. 6. A composite polarizing plate comprising: a polarizing film; a transparent protective film laminated on one surface of the polarizing film through an adhesive layer; and a retardation film laminated on the other side of the polarizing film through an adhesive layer The composite polarizing plate is characterized in that: @the retardation film has an in-plane retardation axis direction, an in-plane phase axis direction, and a thickness direction refractive index of nx, ny, and nz, and a thickness of d (nm). When the light having a wavelength of 5 to 90 nm satisfies the film of the olefin-based resin of the following formulas (1) and (2), the adhesive layer is stored at a temperature of 8 (TC at a temperature of O.IMPa or more). The composition of the high elastic adhesive, 1 5 Onm ^ (nx-ny) χ d ^ 3 OOnm (1) 0.2^ (nx-nz) / (nx-ny) ^0.6 (2). The composite polarizing plate of the sixth aspect of the invention, wherein the olefin-based resin is a resin mainly comprising a constituent unit derived from an alicyclic olefin. 8. The composite polarizing plate of claim 6, wherein the phase difference film is The thickness is 20~3 00μιη. 9. The compound partial deviation according to item 6 of the patent application scope The light plate, wherein the thickness of the adhesive layer is 1 to 40 μm. 10. A liquid crystal display device characterized by having a liquid crystal cell and a configuration of -60-201007228 on the one or both sides of the liquid crystal cell. The composite polarizer of the item. -61 --61 -
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104412137A (en) * 2012-06-29 2015-03-11 日东电工株式会社 Circular polarizing plate and organic electroluminescence panel
US9383494B2 (en) 2011-12-26 2016-07-05 Cheil Industries, Inc. Polarizing plate and liquid crystal display including the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9383494B2 (en) 2011-12-26 2016-07-05 Cheil Industries, Inc. Polarizing plate and liquid crystal display including the same
CN104412137A (en) * 2012-06-29 2015-03-11 日东电工株式会社 Circular polarizing plate and organic electroluminescence panel

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