201229162 六、發明說明： [相關申請案之交叉參考] 本申請案要求在韓國智慧財產局中，在2010 20日提出之韓國專利申請案10-2010-0092685及 年8月23曰提出之1 0-20 1 1 -00 83 99 8之優先權， 以引用方式倂入本文。 ( 【發明所屬之技術領域】 本發明係關於一種水性底漆組成物，包含該水 組成物之偏光板，及製備包含底漆層之光學膜的方 特別地，本發明係關於一種用於光學膜之具有良好 及透明性的水性底漆組成物，包含該水性底漆組成 光板，及製備包含底漆層之光學膜的方法。 【先前技術】 ( 通常，偏光板具有諸如在圖1中所示之堆疊結 考圖1，偏光板包含偏光器1及三乙醯基纖維素（ 膜，其使用聚乙烯醇（PVA )水溶液製之水性黏合 至該偏光器的雙面。若使用此種偏光板於平面內 IPS )模式液晶顯示器卻無另外之補償（compens 膜時，該IPS模式液晶顯示器之視角是狹窄的。在 中，爲增加該IPS模式液晶顯示器之視角，二偏光 膜之一可用實質上在厚度及表面方向上不具有相差 滯TAC ( Z-TAC )膜代替。 年9月 在 201 1 其揭示 性底漆 法。更 黏合性 物之偏 構。參 TAC ) 劑貼合 切換（ ation ) 此情況 板TAC 的零阻 201229162 然而，因爲TAC膜基本上易受潮，該Ζ-TAC膜在長 時間使用時由於尺寸變化而有差的耐用性。因這理由，曾 企圖使用由具有防水性且具有低相差之環狀烯烴樹脂或丙 烯酸系樹脂所形成之膜。特別地，已知：丙烯酸系膜在成 本以及光學特性和耐用性方面可以是有利的。 在使用TAC膜做爲防護膜以製造偏光板的情況中， 經常使用水性PVA黏合劑以將該TAC膜黏合至PVA偏光 器。在此情況中，在該TAC膜之表面上進行鹼或電暈處 理以增加黏合強度。然而，在使用丙烯酸系膜及PVA黏 合劑以製造偏光板之情況中，難以經由鹼或電暈處理獲得 所要之黏合強度。若典型的TAC膜以鹼或電暈處理來處 理，則將親水性基團諸如羥基導至該TAC膜表面，且因 此由於在該親水性基團與P V A黏合劑之間的氫鍵，可容 易地確保在該TAC膜與該PVA黏合劑之間黏合強度。另 一方面，在丙烯酸系膜以電暈或電漿處理來表面處理的情 況中，在該丙烯酸系膜與P V A偏光器之間不能確保足夠 之黏合強度。 可以使用紫外光（UV )可固化之丙烯酸系黏合劑， 以將丙烯酸系膜黏合至偏光器。然而在此情況中，需要另 外之固化程序，且也可能需要防爆裝置，因爲使用揮發性 可燃單體。此外，可以經由固體含量及程序之控制，將典 型的水性PVA黏合劑形成爲具有約1 〇〇奈米厚度之薄層 ，但難以使UV可固化之丙烯酸系黏合劑形成具有約1毫 米或更小厚度之層。因此，包含丙烯酸系黏合劑層之偏光 -6 - 201229162 板可能破裂，因丙烯酸系黏合劑層之脆性增加。另外，丙 烯酸系黏合劑可能無法堅固地黏至偏光器，即使在該丙烯 酸系黏合劑可堅固地黏至丙烯酸系膜的情況中。包含大量 酸官能基團之黏合劑可堅固地黏至偏光器。然而，這可能 引起腐蝕且污染工作環境。 因此，需要一種包含底漆層之丙烯酸系膜以改良程序 效率且不改變現有之黏合劑。此外，需要發展一種具有穩 ( 定之黏合性質的透明底漆組成物。 【發明內容】 本發明之一方面提供一種底漆組成物，其用於加強基 底材料與黏合劑層之間的黏合強度，同時不影響光學膜之 透明性。 本發明之另一方面提供一種偏光板，其中由底漆組成 物所形成之底漆層設置在偏光器與光學膜之間。 \ 本發明之另一方面提供一種製備包含底漆層之光學膜 的方法。 依照本發明之一方面，提供一種底漆組成物，其包含 :對於每100重量份之該底漆組成物而言，1至30重量 份之聚胺基甲酸酯聚合物、〇 · 1至1 〇重量份之水可分散粒 子、其餘爲水。 該聚胺基甲酸酯聚合物可具有在30,000至ϊοο,οοο 範圍內之重量平均分子量。 該底漆組成物可包含3至20重量份之聚胺基甲酸酯 201229162 聚合物。 該聚胺基甲酸酯聚合物可包含羧酸基團。 該聚胺基甲酸酯聚合物可藉由多元醇與異氰酸醋反應 獲得》 該多元醇可以是選自聚酯多元醇、聚醚多元醇、及聚 碳酸酯二元醇之至少一者。 該異氰酸酯可以是選自以下之至少一者：甲苯二異氰ι 酸酯（TDI) 、4,4-二苯基甲烷二異氰酸酯（MDI)、丨，5· 萘二異氰酸酯（NDI )、二甲基聯苯二異氰酸酯（TODI ) 、六亞甲基二異氰酸酯（HDI)、異佛爾酮二異氰酸醋（ IP DI)、對-伸苯基二異氰酸酯、反式環己烷-14—二異氰 酸酯、及二甲苯二異氰酸酯（XDI)。 該水可分散粒子可包含至少一種選自以下之無機氧化 物：矽石、氧化鈦、氧化鋁、氧化锆、及氧化銻。 該水可分散粒子包含選自以下之至少一者：聚砂氧樹 脂、氟樹脂、（甲基）丙烯酸系樹脂、交聯聚乙烯醇（ PVA )、及三聚氰胺樹脂。 該水可分散粒子具有在10奈米至200奈米範圍內之 平均直徑。 依照本發明之另一方面，提供一種光學膜，包含在其 至少一面上所形成之底漆層，其中該底漆層係由申請專利 範圍第1至1 0項中任一項的底漆組成物所形成。 該底漆層可具有在40°至100°範圍內之水接觸角。 該光學膜可以是丙烯酸系膜。 -8- 201229162 該丙烯酸系膜可包含：包含（甲基）丙烯酸烷酯單元 及苯乙烯單元之共聚物；及主幹中包含碳酸酯部份之芳族 樹脂。 該丙烯酸系膜可包含：（甲基）丙烯酸烷酯單元；苯 乙烯單元；經至少一個羰基取代之3-至6-員雜環單元； 及丙嫌腈（vinyl cyanide)單元。 該底漆層可具有在50奈米至1，〇〇〇奈米範圍內之厚 度。 依照本發明之另一方面，提供一種偏光板，其包含： 偏光器及貼合至該偏光器之任一面或二面的光學膜，其中 由申請專利範圍第1至1 0項中任一項之底漆組成物所形 成之底漆層設置在該光學膜之至少一面上。 黏合劑層可以形成在該偏光器之任一面或二面上，且 該黏合劑層可以由PVA樹脂形成。 依照本發明之另一方面，提供一種製備包含底漆層之 光學膜的方法，該方法包含··以如申請專利範圍第1至 1 0項中任一項的底漆組成物塗覆光學膜之至少一面；且 將塗覆該底漆組成物之光學膜乾燥。 該方法可另外包含以選自鹼處理、電暈處理、及電漿 處理之表面處理方式處理該光學膜之該至少一面。。 【實施方式】 現在將參考所附之圖詳細描述本發明之例示的具體例 -9 - 201229162 本發明提供一種用於改良光學膜與黏合劑層之間的黏 合強度且用於製備具有令人滿意之防水性的偏光板的底漆 組成物。 本發明之底漆組成物可以是水溶性的，且在此情況中 ，可以.不使用防爆裝置。本發明之底漆組成物包含：對於 每100重量份之該底漆組成物而言，1至30重量份之聚 胺基甲酸酯聚合物；0.1至10重量份之水可分散粒子；及 其餘爲水。例如，該底漆組成物可包含，對於每1〇〇重量 Q 份之該底漆組成物而言，3至20重量份之該聚胺基甲酸 酯聚合物。在另一實例中，該底漆組成物可包含，對於每 1〇〇重量份之該底漆組成物而言，5至15重量份之該聚胺 基甲酸酯聚合物》 “其餘爲水”一詞被用以指明：該底漆組成物包含在上 述範圍內之該聚胺基甲酸酯聚合物及該水可分散粒子，同 時水係該底漆組成物之其餘部份以將該底漆組成物補足成 100 重量 ％。 〔) 若該聚胺基甲酸酯聚合物之濃度，對於每100重量份 之該底漆組成物而言，小於1重量份，則該底漆組成物之 黏合性可能是低的。若該聚胺基甲酸酯聚合物之濃度，對 於每100重量份之該底漆組成物而言，大於30重量份， 則該底漆組成物之黏度可能是高的，而難以在塗覆程序中 使該底漆組成物均平，且因此可能花費長時間以乾燥該底 漆組成物9 若該水可分散粒子之濃度，對於每100重量份之該底 -10- 201229162 漆組成物而言，是小於0.1重量份，則當該膜被滾壓時， 含該底漆組成物之膜可能無法在另一者上滑動，且因此該 膜可能被撕裂。若該水可分散粒子之濃度，對於每100重 量份之該底漆組成物而言，是大於1 0重量份，則難以使 用該底漆組成物製造具有0.3或更低濁度的透明膜，因爲 若該水可分散粒子之平均直徑是50奈米或更大，則該透 明膜之濁度增加。 該聚胺基甲酸酯聚合物之重量平均分子量可以在 10,000至100,000之範圍內。若該聚胺基甲酸酯聚合物之 重量平均分子量是少於1 0,000，則該底漆組成物之黏合強 度是低的，且若該聚胺基甲酸酯聚合物之重量平均分子量 是大於1 00,000，則難以製備水可分散粒子。 該聚胺基甲酸酯聚合物可包含羧酸基團。在此情況中 ，當該聚胺基甲酸酯聚合物被製備時，產生陰離子以促進 該聚胺基甲酸酯聚合物分散於水中且因此使該聚胺基甲酸 酯聚合物與偏光器密切接觸。 可以經由多元醇、聚異氰酸酯、及具有游離羧基之鏈 延長劑之間的反應獲得包含羧基之聚胺基甲酸酯聚合物。 該具有游離羧基之鏈延長劑的實例包含二羥基羧酸及二羥 基丁二酸。該二羥基羧酸可以是二烷基醇烷酸，包含二（ 羥甲基）烷酸諸如二（羥甲基）乙酸、二（羥甲基）丁酸 、二（羥甲基）丙酸、二（羥甲基）丁酸、及二（羥甲基 )戊酸。所列之二羥基羧酸的實例可以單獨被使用或結合 使用。 -11 - 201229162 該聚胺基甲酸酯聚合物藉由多元醇與聚異氰酸酯間之 反應獲得。該多元醇可以是任何種類之每一分子包含二或 更多羥基之多元醇。該多元醇之實例包括聚酯多元醇、聚 醚多元醇、及聚碳酸酯二元醇。該多元醇可以是選自所列 材料之至少一者。亦即，該多元醇可以是所列材料之一者 或其二或更多者之組合。 該多元醇可以是選自下列之至少一者：乙二醇、1 ,2-丙二醇、1，3-丙二醇、1，3-丁 二醇、1，4-丁二醇、新戊二 （） 醇、戊二醇、1，6-己二醇、1,8-辛二醇、1，10-癸二醇、 4,4’-二羥基苯基丙烷、4,4’-二羥基甲基甲烷、二乙二醇 、三乙二醇、聚乙二醇、二丙二醇、聚丙二醇、1，4-環己 烷二甲醇、1，4-環己二醇、雙酚A、雙酚F、甘油、1，1，1-三（羥甲基）丙烷、1,2,5-己三醇、季戊四醇、葡萄糖、 蔗糖、及山梨糖醇。201229162 VI. INSTRUCTIONS: [CROSS REFERENCE TO RELATED APPLICATIONS] This application claims to be filed in Korea Intellectual Property Office, Korea Patent Application No. 10-2010-0092685 and August 23, 2011. -20 1 1 -00 83 99 8 priority, by reference. (Technical Field of the Invention) The present invention relates to an aqueous primer composition, a polarizing plate comprising the same, and an optical film comprising a primer layer. In particular, the present invention relates to an optical device. A water-based primer composition having good and transparent film, comprising the water-based primer to constitute a light plate, and a method of preparing an optical film comprising the primer layer. [Prior Art] (Generally, the polarizing plate has such as shown in FIG. As shown in Fig. 1, the polarizing plate comprises a polarizer 1 and triacetyl cellulose (a film which is adhered to the both sides of the polarizer by using an aqueous solution of polyvinyl alcohol (PVA). If such a polarizing light is used The board is in-plane IPS) mode liquid crystal display without any compensation (compens film, the IPS mode liquid crystal display has a narrow viewing angle. In order to increase the viewing angle of the IPS mode liquid crystal display, one of the two polarizing films can be used substantially. The TAC (Z-TAC) film is not replaced by the phase difference in the thickness and surface direction. The revealing primer method is in September 201. The more adhesive property is biased. The TAC is applied. Switching ( ation ) Zero-resistance of TAC in this case board 201229162 However, because the TAC film is basically susceptible to moisture, the Ζ-TAC film has poor durability due to dimensional changes during long-term use. For this reason, it has been attempted to use A film formed of a cyclic olefin resin or an acrylic resin having water repellency and having a low phase difference. In particular, it is known that an acrylic film can be advantageous in terms of cost as well as optical characteristics and durability. In the case of a protective film for producing a polarizing plate, an aqueous PVA adhesive is often used to bond the TAC film to a PVA polarizer. In this case, alkali or corona treatment is performed on the surface of the TAC film to increase the bonding strength. However, in the case where an acrylic film and a PVA binder are used to manufacture a polarizing plate, it is difficult to obtain a desired adhesive strength by alkali or corona treatment. If a typical TAC film is treated by alkali or corona treatment, hydrophilicity is obtained. A group such as a hydroxyl group is introduced to the surface of the TAC film, and thus, due to hydrogen bonding between the hydrophilic group and the PVA binder, it is easy to ensure that the TAC film is adhered to the PVA Bonding strength between the agents. On the other hand, in the case where the acrylic film is surface-treated by corona or plasma treatment, sufficient bonding strength cannot be ensured between the acrylic film and the PVA polarizer. (UV) curable acrylic adhesive to bond the acrylic film to the polarizer. However, in this case, an additional curing procedure is required, and an explosion-proof device may also be required because of the use of volatile combustible monomers. A typical aqueous PVA adhesive can be formed into a thin layer having a thickness of about 1 〇〇 nanometer by solid content and program control, but it is difficult to form a UV curable acrylic adhesive to have a thickness of about 1 mm or less. Layer. Therefore, the polarizing -6 - 201229162 plate containing the acrylic adhesive layer may be broken due to an increase in brittleness of the acrylic adhesive layer. Further, the acrylic adhesive may not adhere strongly to the polarizer even in the case where the acrylic adhesive can strongly adhere to the acrylic film. Adhesives containing a large number of acid functional groups adhere strongly to the polarizer. However, this can cause corrosion and contaminate the working environment. Therefore, there is a need for an acrylic film comprising a primer layer to improve process efficiency without altering existing adhesives. In addition, there is a need to develop a transparent primer composition having a stable adhesive property. [Invention] It is an aspect of the present invention to provide a primer composition for reinforcing the bonding strength between a base material and a binder layer, At the same time, the transparency of the optical film is not affected. Another aspect of the present invention provides a polarizing plate in which a primer layer formed of a primer composition is disposed between a polarizer and an optical film. A method of preparing an optical film comprising a primer layer. According to an aspect of the invention, there is provided a primer composition comprising: 1 to 30 parts by weight per 100 parts by weight of the primer composition The urethane polymer, 1·1 to 1 part by weight of water-dispersible particles, and the balance being water. The polyurethane polymer may have a weight average molecular weight in the range of 30,000 to ϊοο, οοο. The primer composition may comprise from 3 to 20 parts by weight of the polyurethane urethane 201229162 polymer. The polyurethane polymer may comprise a carboxylic acid group. The polyurethane polymer may be borrowed. The polyol is reacted with isocyanic acid to obtain the polyol. The polyol may be at least one selected from the group consisting of polyester polyols, polyether polyols, and polycarbonate diols. The isocyanate may be at least one selected from the group consisting of : Toluene diisocyanurate (TDI), 4,4-diphenylmethane diisocyanate (MDI), hydrazine, 5 · naphthalene diisocyanate (NDI ), dimethylbiphenyl diisocyanate (TODI ), Liu Ya Methyl diisocyanate (HDI), isophorone diisocyanate (IP DI), p-phenylene diisocyanate, trans cyclohexane-14-diisocyanate, and xylene diisocyanate (XDI). The water-dispersible particles may comprise at least one inorganic oxide selected from the group consisting of vermiculite, titanium oxide, aluminum oxide, zirconium oxide, and cerium oxide. The water-dispersible particles comprise at least one selected from the group consisting of polyoxyn a resin, a fluororesin, a (meth)acrylic resin, a crosslinked polyvinyl alcohol (PVA), and a melamine resin. The water-dispersible particles have an average diameter in the range of 10 nm to 200 nm. In another aspect, an optical film is provided, A primer layer formed on at least one side thereof, wherein the primer layer is formed from the primer composition of any one of claims 1 to 10. The primer layer may have a temperature of 40°. Water contact angle in the range of 100°. The optical film may be an acrylic film. -8- 201229162 The acrylic film may include: a copolymer comprising an alkyl (meth)acrylate unit and a styrene unit; An aromatic resin comprising a carbonate moiety. The acrylic film may comprise: an alkyl (meth)acrylate unit; a styrene unit; a 3- to 6-membered heterocyclic unit substituted with at least one carbonyl group; (vinyl cyanide) unit. The primer layer may have a thickness in the range of 50 nm to 1, nanometer. According to another aspect of the present invention, a polarizing plate comprising: a polarizer and an optical film attached to either or both sides of the polarizer, wherein any one of claims 1 to 10 of the patent application is provided A primer layer formed of the primer composition is disposed on at least one side of the optical film. A binder layer may be formed on either or both sides of the polarizer, and the binder layer may be formed of a PVA resin. According to another aspect of the present invention, there is provided a method of preparing an optical film comprising a primer layer, the method comprising: coating an optical film with a primer composition according to any one of claims 1 to 10; At least one side; and the optical film coated with the primer composition is dried. The method can additionally comprise treating the at least one side of the optical film with a surface treatment selected from the group consisting of alkali treatment, corona treatment, and plasma treatment. . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The specific examples of the present invention will now be described in detail with reference to the accompanying drawings, in which the present invention provides a method for improving the bonding strength between an optical film and an adhesive layer and is satisfactory for preparation. A primer composition of a water-repellent polarizing plate. The primer composition of the present invention may be water soluble, and in this case, an explosion-proof device may not be used. The primer composition of the present invention comprises: 1 to 30 parts by weight of the polyurethane polymer per 100 parts by weight of the primer composition; 0.1 to 10 parts by weight of water-dispersible particles; The rest is water. For example, the primer composition may comprise, by weight to 2 parts by weight of the primer composition, 3 to 20 parts by weight of the polyurethane polymer. In another example, the primer composition may comprise, for each 1 part by weight of the primer composition, 5 to 15 parts by weight of the polyurethane polymer "the rest is water The term "is used to indicate that the primer composition comprises the polyurethane polymer and the water-dispersible particles within the above range, while the water is the remainder of the primer composition to The primer composition is made up to 100% by weight. [) If the concentration of the polyurethane polymer is less than 1 part by weight per 100 parts by weight of the primer composition, the adhesion of the primer composition may be low. If the concentration of the polyurethane polymer is greater than 30 parts by weight per 100 parts by weight of the primer composition, the viscosity of the primer composition may be high and difficult to coat. The primer composition is leveled in the procedure, and thus it may take a long time to dry the primer composition 9 if the concentration of the water dispersible particles is for every 100 parts by weight of the base -10- 201229162 lacquer composition That is, less than 0.1 parts by weight, when the film is rolled, the film containing the primer composition may not slide on the other, and thus the film may be torn. If the concentration of the water-dispersible particles is more than 10 parts by weight per 100 parts by weight of the primer composition, it is difficult to use the primer composition to produce a transparent film having a haze of 0.3 or less. Since the average diameter of the water-dispersible particles is 50 nm or more, the turbidity of the transparent film is increased. The polyurethane polymer may have a weight average molecular weight in the range of 10,000 to 100,000. If the weight average molecular weight of the polyurethane polymer is less than 10,000, the adhesive strength of the primer composition is low, and if the weight average molecular weight of the polyurethane polymer is greater than At 1 00,000, it is difficult to prepare water-dispersible particles. The polyurethane polymer can comprise a carboxylic acid group. In this case, when the polyurethane polymer is prepared, an anion is generated to promote dispersion of the polyurethane polymer in water and thus the polyurethane polymer and the polarizer Close contact. The urethane-containing polyurethane polymer can be obtained by a reaction between a polyol, a polyisocyanate, and a chain extender having a free carboxyl group. Examples of the chain extender having a free carboxyl group include a dihydroxycarboxylic acid and a dihydroxysuccinic acid. The dihydroxycarboxylic acid may be a dialkyl alcohol alkanoic acid comprising a bis(hydroxymethyl)alkanoic acid such as bis(hydroxymethyl)acetic acid, bis(hydroxymethyl)butyric acid, bis(hydroxymethyl)propionic acid, Di(hydroxymethyl)butyric acid, and bis(hydroxymethyl)pentanoic acid. Examples of the listed dihydroxycarboxylic acids may be used singly or in combination. -11 - 201229162 The polyurethane polymer is obtained by a reaction between a polyol and a polyisocyanate. The polyol may be a polyol of any kind containing two or more hydroxyl groups per molecule. Examples of the polyol include polyester polyols, polyether polyols, and polycarbonate diols. The polyol may be at least one selected from the listed materials. That is, the polyol may be one of the listed materials or a combination of two or more thereof. The polyol may be at least one selected from the group consisting of ethylene glycol, 1,2-propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, and neopentyl () Alcohol, pentanediol, 1,6-hexanediol, 1,8-octanediol, 1,10-decanediol, 4,4'-dihydroxyphenylpropane, 4,4'-dihydroxymethyl Methane, diethylene glycol, triethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, 1,4-cyclohexane dimethanol, 1,4-cyclohexanediol, bisphenol A, bisphenol F, Glycerin, 1,1,1-tris(hydroxymethyl)propane, 1,2,5-hexanetriol, pentaerythritol, glucose, sucrose, and sorbitol.
該聚酯多元醇可以藉由多元酸及多元醇之間的反應獲 得。該多元酸之實例包括：芳族二羧酸諸如鄰苯二甲酸、 G 異苯二甲酸、對苯二甲酸、1，4-萘二羧酸、2,5-萘二羧酸 、2，6-萘二羧酸、聯苯基二羧酸、及四氫苯二甲酸；脂族 二羧酸諸如草酸、丁二酸、丙二酸、戊二酸、己二酸、庚 二酸、辛二酸、壬二酸、癸二酸、亞麻油酸、順丁烯二酸 、反丁烯二酸、甲基反丁烯二酸、及亞甲基丁二酸；脂環 族二羧酸諸如六氫苯二甲酸、四氫苯二甲酸、1，3-環己烷 二羧酸、及1，4-環己烷二羧酸；及反應性衍生物諸如其酸 酐類、烷酯類、及酸鹵化物。所列之多元酸之實例可被單 -12- 201229162 獨使用或結合使用。或者，該多元酸可以是選自下列之至 少一者：聚四亞甲基二醇（PTMG )、聚丙二醇（PPG ) 、及聚乙二醇（PEG )。 該聚碳酸酯多元醇可以是選自下列之至少一者：聚（ 碳酸伸己二酯）二醇及聚（環己烷碳酸酯）二醇。 例如，該聚醚多元醇可以藉由利用開環聚合作用將環 氧烷加至多元醇而獲得。例如，該多元醇之實例包括乙二 醇、二乙二醇、丙二醇、二丙二醇、甘油、及三（羥甲基 )丙烷。所列之該多醇之實例可單獨被使用或結合使用。 該聚異氰酸酯可以是包含二或更多NCO基團之化合 物。例如，該聚異氰酸酯可以選自下列群組：甲苯二異氰 酸酯（TDI) 、4,4-二苯基甲烷二異氰酸酯（MDI) 、1,5-萘二異氰酸酯（NDI)、二甲基聯苯二異氰酸酯（TODI) 、六亞甲基二異氰酸酯（HMDI)、異佛爾酮二異氰酸酯 (IPDI)、對-伸苯基二異氰酸酯、反式環己烷二異 氰酸酯、二甲苯二異氰酸酯（XDI)、及其組合。 該聚胺基甲酸酯聚合物可以藉由在此技藝中已知之方 法製備。例如’該聚胺基甲酸酯聚合物可以藉由以下方法 製備：單一注射方法，其中多種成分立即互相反應；或多 步驟方法，其中多種成分逐步互相反應。若該聚胺基甲酸 酯聚合物包含羧基’則該聚胺基甲酸酯聚合物可以藉由多 步驟方法製備，因爲可以容易地導入該羧基。當製備該聚 胺基甲酸酯聚合物時，可以使用合適的胺基甲酸酯反應觸 媒。 -13- 201229162 除了上述多種成分之外，可以使用另一多元醇及//或 另一鏈延長劑’當製備該聚胺基甲酸酯聚合物時。 例如’該另一多元醇可以是具有三或更多羥基之多元 醇’諸如山梨糖醇、甘油、三（羥甲基）乙烷、三（經甲 基）丙院、及季戊四醇。 另一鏈延長劑之實例包括：二醇類諸如乙二醇、二乙 二醇、三乙二醇、1,3-丙二醇、1,3-丁二醇' 1，4-丁二醉 、新戊二醇、戊二醇、1,6-己二醇、及丙二醇；脂族二胺 類諸如乙二胺、丙二胺、六亞甲基二胺、1，4-丁二胺、及 胺基乙基乙醇胺；脂環族二胺類諸如異佛爾酮二胺及4,4-二環己基甲烷二胺；及芳族二胺諸如二甲苯二胺及甲苯二 胺。 此外，當製備聚胺基甲酸酯聚合物時，可以使用中和 劑。該中和劑可以改良該聚胺基甲酸酯聚合物在水中的安 定性。該中和劑之實例包括氨、N-甲基嗎啉、三乙胺、二 甲基乙醇胺、甲基二乙醇胺、三乙醇炔、嗎啉、三丙胺、 乙醇胺、及三異丙醇胺。所列之該中和劑的實例可以被單 獨使用或結合使用。 該聚胺基甲酸酯聚合物可以藉由使用一種不與該聚異 氰酸酯反應卻可溶於水中之有機溶劑製備。該有機溶劑之 實例包括：酯溶劑諸如乙酸乙酯及乙二醇單丁基醚乙酸醋 :酮溶劑諸如丙酮、甲基乙基酮及甲基異丁基酮；及酸溶 劑諸如二噁烷、四氫呋喃。所列之有機溶劑的實例可被單 獨使用或結合使用。 -14- 201229162 可以使用任何適合的可分散粒子以作爲本發明中之水 可分散粒子。例如，可以使用可分散於水中之粒子作爲該 水可分散粒子。例如’可以使用無機粒子或有機粒子作爲 該水可分散粒子。該無機粒子之實例包括無機氧化物諸如 矽石、氧化鈦、氧化鋁、氧化锆、及氧化銻。該有機粒子 之實例包括聚矽氧樹脂、氟樹脂、（甲基）丙烯酸系樹脂 '交聯聚乙烯醇、及三聚氰胺樹脂。 例如，可以使用矽石作爲該水可分散粒子，因有令人 滿意之防阻斷能力、高透明性、抗渾濁性、抗著色性、及 對偏光板之光學特性的低影響性。此外，因爲矽石被良好 地分散在該底漆組成物中且維持在安定的分散狀態中，使 用矽石可以有效率地形成底漆層。 該水可分散粒子可具有在10奈米至200奈米範圍內 之直徑（平均一級粒子直徑）。例如，該水可分散粒子可 具有在20奈米至70奈米範圍內之平均直徑。若該水可分 散粒子之平均直徑小於1 〇奈米，則因高的表面能量，藉 由矽石凝聚作用，該水可分散粒子在底漆溶液中可以沉澱 ，因此破壞溶液安定性。另一方面，若該水可分散粒子之 平均直徑大於200奈米，則該水可分散粒子可能不被均勻 地分散且可以在該底漆溶液中局部地結塊，且因此具有 400奈米或更長波長之光可被散射以致增加濁度，因爲塊 體大於可見光的波長（400奈米至800奈米）。若該水可 分散粒子具有在上述範圍內之平均直徑，則可以在底漆層 上合適地形成凹凸結構以有效地減少在該底漆層與丙烯酸 -15- 201229162 系膜之間的摩擦及/或在底漆層之間的摩擦。結果，可以 改良防阻斷能力。 因爲本發明之底漆組成物是水性組成物，該水可分散 粒子被混合成水分散劑。例如，在使用矽石作爲水可分散 粒子之情況中，可以使用膠態矽石作爲水可分散粒子。可 以使用商業上可得之膠態矽石：SNOWTEX系列（Nissan chemical industries, Ltd. ) ’ AEROSIL 系歹!J ( Airproducts )，EPOSTAR 系歹IJ ( Nihon Catalyst Co.) ，SOLIOSTAR RA系列，及LSH系列（Ranco )。 本發明也提供一種光學膜，其至少一面覆蓋由上述底 漆組成物所形成之底漆層。 該底漆層之面具有在40°至100°範圍內之水接觸角。 例如，該水接觸角範圍可以在是50°至90°。在另一實例 中，該水接觸角範圍可以是60°至80°。若該水接觸角少 於40°，則因爲該底漆層是高度親水性的，該底漆層可與 偏光器之碘反應以使該碘的排列變形。這可導致彩色特性 的變差及偏光程度的減低。另一方面，若該水接觸角大於 1 00°，則因爲該底漆層是疏水性的，可能難以使該底漆層 與偏光器接觸。 該光學膜可具有單一層結構或包含二或更多層之多層 結構。在後項情況中，藉由使用相同材料或不同材料可以 將各層堆疊。在本揭示中，‘光學膜’一詞被用來指明可在 光學上使用之膜。例如，‘光學膜’一詞包含：具有80%或 更高之透光率的膜》此外，‘光學膜’一詞包含具有50%或 201229162 更低之透光率的膜，若該膜被用於特定光學元件諸如偏光 器中。 詳言之，該光學膜可以是包含（甲基）丙烯酸酯樹脂 之丙烯系膜。例如，藉由擠出一種含有（甲基）丙烯酸酯 樹脂作爲主成分之模塑材料’可以形成包含（甲基）丙烯 酸酯樹脂之膜。 該丙烯酸系膜可包含：具有（甲基）丙烯酸烷酯單元 及苯乙烯單元之共聚物；具有碳酸酯部分於其主幹中之芳 族樹脂。或者，該丙烯酸系膜可包含：（甲基）丙烯酸烷 酯單元；苯乙烯單元；及經至少一羰基取代之3-至6-員 雜環單元；及丙烯腈單元。或者，該丙烯酸系膜可以由具 有內酯結構之丙烯酸系樹脂所形成。 具有內酯環結構之（甲基）丙烯酸酯樹脂的實例是在 日本專利申請案公開公告 2000-230016、 2001-151814及 2002-1 20326中所揭示之具有內酯環結構之（甲基）丙烯 酸酯樹脂。 在韓國專利申請案公開公告1 0-2009-0 1 1 5040中所揭 示之樹脂組成物是一種例示之具有芳族環的（甲基）丙烯 酸酯樹脂。所揭示之樹脂組成物包含：（a )包含至少一 種（甲基）丙烯酸酯衍生物之（甲基）丙烯酸酯單元；（ b)包含具有含羥基部份及芳族部份之鏈的芳族單元；（c )包含至少一種苯乙烯衍生物的苯乙烯單元。單元（a) 至（c )可以分開的共聚物形式被包含在該樹脂組成物中 ’或單元（a)至（c)之二或更多者以共聚物形式被包含 -17- 201229162 在該樹脂組成物中。 不特別限制形成（甲基）丙烯酸酯樹脂膜的方法。例j 如’材料諸如（甲基）丙烯酸酯樹脂、聚合物及添加劑可 藉由合適方法完全混合以形成熱塑性樹脂組成物，然後可 由該熱塑性樹脂組成物形成膜。在另一實例中，溶液諸如 (甲基）丙烯酸酯樹脂溶液、聚合物溶液及添加劑溶液可 個別地製備且互相混合以使用該混合溶液形成膜。 該熱塑性樹脂組成物可以藉由以下方式獲得：使用合 適之混合器諸如全混合器（omni-mixer)將上述原料預先 摻混；且捏合及擠出該混合物。該混合物可以藉由任何混 合器捏合及擠出。例如，可以使用單軸擠出機、雙軸擠出 機或壓力捏合機。 膜形成方法之實例包含：可以使用溶液澆鑄方法、熔 化擠出方法、壓延方法及壓縮方法。可以合意地使用溶液 澆鑄方法或熔化擠出方法以形成膜。 可用於溶液澆鑄方法中之溶劑的實例包含：芳族烴類 G) 諸如苯、甲苯、及二甲苯；脂族烴類諸如環己烷及十氫萘 :酯類諸如乙酸乙酯及乙酸丁酯；酮類諸如丙酮、甲基乙 基酮及甲基異丁基酮；醇類諸如甲醇、乙醇、異丙醇、丁 醇、異丁醇、甲基溶纖素（cellosove)、乙基溶纖素及丁 基溶纖素；醚類諸如四氫呋喃及二噁烷；鹵化烴類諸如二 氯甲烷、氯仿及四氯化碳；二甲基甲醯胺；及二甲基亞颯 。所列之溶劑可以單獨被使用或結合使用。 例如，可以使用鼓式澆鑄機、帶式澆鑄機、或旋轉塗 -18- 201229162 覆機以作爲進行溶液澆鑄方法之裝置。熔化擠出方法之實 例包括T -鑄模方法及膨脹方法。可以在！ 5 〇 至3 5 〇 〇c之 溫度範圍內形成膜。例如，可以在200。(：至300。(：之溫度 範圍內形成膜。 在使用T-鑄模方法形成膜之情況中，T_鑄模可以安 裝在單軸或雙軸擠出機之前端以滾壓經擠出之膜。在此情 況中’當膜被擠出且滾壓時，該膜可在擠出方向上藉由調 節該膜之經滾壓部份的溫度而被單軸延長（定向）。或者 ’該膜可以同時地或連續地在垂直於該擠出方法（雙軸定 向）之方向上被雙軸延長（定向）。 該丙烯酸系膜可以是非定向膜或定向膜。在後項情況 中，該丙烯酸系膜可以是單軸定向膜或雙軸定向膜。若該 丙烯酸系膜是雙軸定向膜，則該丙烯酸系膜可以同時在雙 軸方向上被定向或連續地在雙軸方向上被定向。若該丙烯 酸系膜是雙軸定向膜，則該丙烯酸系膜之品質可被改良， 因有經改良之機械強度。該定向之丙烯酸系膜可包含另一 熱塑性樹脂以防止相差增加且維持光學均向性。The polyester polyol can be obtained by a reaction between a polybasic acid and a polyhydric alcohol. Examples of the polybasic acid include: an aromatic dicarboxylic acid such as phthalic acid, G isophthalic acid, terephthalic acid, 1,4-naphthalene dicarboxylic acid, 2,5-naphthalene dicarboxylic acid, 2,6 -naphthalene dicarboxylic acid, biphenyl dicarboxylic acid, and tetrahydrophthalic acid; aliphatic dicarboxylic acids such as oxalic acid, succinic acid, malonic acid, glutaric acid, adipic acid, pimelic acid, bis Acid, azelaic acid, sebacic acid, linoleic acid, maleic acid, fumaric acid, methyl fumaric acid, and methylene succinic acid; alicyclic dicarboxylic acid such as six Hydrogenic acid, tetrahydrophthalic acid, 1,3-cyclohexanedicarboxylic acid, and 1,4-cyclohexanedicarboxylic acid; and reactive derivatives such as acid anhydrides, alkyl esters, and acids thereof halide. Examples of the polybasic acids listed may be used alone or in combination with -12-201229162. Alternatively, the polybasic acid may be at least one selected from the group consisting of polytetramethylene glycol (PTMG), polypropylene glycol (PPG), and polyethylene glycol (PEG). The polycarbonate polyol may be at least one selected from the group consisting of poly(ethylene carbonate) diols and poly(cyclohexane carbonate) diols. For example, the polyether polyol can be obtained by adding an oxane to a polyol by ring-opening polymerization. For example, examples of the polyol include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, glycerin, and tris(hydroxymethyl)propane. Examples of the polyols listed may be used alone or in combination. The polyisocyanate may be a compound comprising two or more NCO groups. For example, the polyisocyanate may be selected from the group consisting of toluene diisocyanate (TDI), 4,4-diphenylmethane diisocyanate (MDI), 1,5-naphthalene diisocyanate (NDI), dimethylbiphenyl Isocyanate (TODI), hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), p-phenylene diisocyanate, trans cyclohexane diisocyanate, xylene diisocyanate (XDI), and Its combination. The polyurethane polymer can be prepared by methods known in the art. For example, the polyurethane polymer can be produced by a single injection method in which a plurality of components react with each other immediately, or a multi-step process in which a plurality of components are gradually reacted with each other. If the polyurethane polymer contains a carboxyl group, the polyurethane polymer can be produced by a multi-step process because the carboxyl group can be easily introduced. When preparing the polyurethane polymer, a suitable urethane reaction catalyst can be used. -13- 201229162 In addition to the above various ingredients, another polyol and/or another chain extender can be used when preparing the polyurethane polymer. For example, the other polyol may be a polyol having three or more hydroxyl groups such as sorbitol, glycerin, tris(hydroxymethyl)ethane, tris(methyl)propylamine, and pentaerythritol. Examples of another chain extender include: glycols such as ethylene glycol, diethylene glycol, triethylene glycol, 1,3-propanediol, 1,3-butanediol '1,4-butane drunk, new Ethylene glycol, pentanediol, 1,6-hexanediol, and propylene glycol; aliphatic diamines such as ethylenediamine, propylenediamine, hexamethylenediamine, 1,4-butanediamine, and amine Ethyl ethylethanolamine; alicyclic diamines such as isophorone diamine and 4,4-dicyclohexylmethanediamine; and aromatic diamines such as xylene diamine and toluenediamine. Further, when a polyurethane polymer is prepared, a neutralizing agent can be used. The neutralizing agent can improve the stability of the polyurethane polymer in water. Examples of the neutralizing agent include ammonia, N-methylmorpholine, triethylamine, dimethylethanolamine, methyldiethanolamine, triethanolyne, morpholine, tripropylamine, ethanolamine, and triisopropanolamine. Examples of the neutralizing agent listed may be used singly or in combination. The polyurethane polymer can be prepared by using an organic solvent which is not soluble in the polyisocyanate but soluble in water. Examples of the organic solvent include: an ester solvent such as ethyl acetate and ethylene glycol monobutyl ether acetate: a ketone solvent such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; and an acid solvent such as dioxane, Tetrahydrofuran. Examples of the listed organic solvents may be used singly or in combination. -14- 201229162 Any suitable dispersible particles may be used as the water-dispersible particles in the present invention. For example, particles dispersible in water can be used as the water-dispersible particles. For example, inorganic particles or organic particles can be used as the water-dispersible particles. Examples of the inorganic particles include inorganic oxides such as vermiculite, titanium oxide, aluminum oxide, zirconium oxide, and cerium oxide. Examples of the organic particles include polyoxyxylene resin, fluororesin, (meth)acrylic resin 'crosslinked polyvinyl alcohol, and melamine resin. For example, vermiculite can be used as the water-dispersible particle due to satisfactory anti-blocking ability, high transparency, turbidity resistance, coloring resistance, and low influence on the optical characteristics of the polarizing plate. Further, since the vermiculite is well dispersed in the primer composition and maintained in a stable dispersed state, the primer layer can be efficiently formed using vermiculite. The water-dispersible particles may have a diameter (average first-order particle diameter) in the range of 10 nm to 200 nm. For example, the water-dispersible particles may have an average diameter in the range of from 20 nm to 70 nm. If the water-dispersible particles have an average diameter of less than 1 〇 nanometer, the water-dispersible particles can be precipitated in the primer solution due to the high surface energy due to the agglomeration of the vermiculite, thereby deteriorating the stability of the solution. On the other hand, if the water-dispersible particles have an average diameter of more than 200 nm, the water-dispersible particles may not be uniformly dispersed and may be partially agglomerated in the primer solution, and thus have 400 nm or Longer wavelength light can be scattered to increase turbidity because the bulk is larger than the wavelength of visible light (400 nm to 800 nm). If the water-dispersible particles have an average diameter within the above range, a textured structure can be suitably formed on the primer layer to effectively reduce friction between the primer layer and the acrylic-15-201229162 film and/or Or friction between the primer layers. As a result, the anti-blocking ability can be improved. Since the primer composition of the present invention is an aqueous composition, the water-dispersible particles are mixed into a water-dispersing agent. For example, in the case of using vermiculite as the water-dispersible particle, colloidal vermiculite can be used as the water-dispersible particle. Commercially available colloidal vermiculite can be used: SNOWTEX series (Nissan chemical industries, Ltd. ) ' AEROSIL system 歹! J (Airproducts), EPOSTAR system 歹 IJ (Nihon Catalyst Co.), SOLIOSTAR RA series, and LSH series (Ranco). The present invention also provides an optical film having at least one side covering a primer layer formed of the above primer composition. The face of the primer layer has a water contact angle in the range of 40° to 100°. For example, the water contact angle may range from 50° to 90°. In another example, the water contact angle can range from 60° to 80°. If the water contact angle is less than 40, since the primer layer is highly hydrophilic, the primer layer can react with the iodine of the polarizer to deform the arrangement of the iodine. This can result in deterioration of color characteristics and a reduction in the degree of polarization. On the other hand, if the water contact angle is more than 100°, since the primer layer is hydrophobic, it may be difficult to bring the primer layer into contact with the polarizer. The optical film may have a single layer structure or a multilayer structure comprising two or more layers. In the latter case, the layers can be stacked by using the same material or different materials. In the present disclosure, the term 'optical film' is used to indicate a film that can be used optically. For example, the term 'optical film' includes: a film having a light transmittance of 80% or higher. In addition, the term 'optical film' includes a film having a light transmittance of 50% or 201229162, if the film is Used in specific optical components such as polarizers. In detail, the optical film may be a propylene-based film containing a (meth) acrylate resin. For example, a film containing a (meth) acrylate resin can be formed by extruding a molding material containing a (meth) acrylate resin as a main component. The acrylic film may comprise: a copolymer having an alkyl (meth)acrylate unit and a styrene unit; and an aromatic resin having a carbonate portion in its trunk. Alternatively, the acrylic film may comprise: an alkyl (meth) acrylate unit; a styrene unit; and a 3- to 6-membered heterocyclic unit substituted with at least one carbonyl group; and an acrylonitrile unit. Alternatively, the acrylic film may be formed of an acrylic resin having a lactone structure. Examples of the (meth) acrylate resin having a lactone ring structure are (meth)acrylic acid having a lactone ring structure disclosed in Japanese Patent Laid-Open Publication Nos. 2000-230016, 2001-151814, and 2002-1 20326. Ester resin. The resin composition disclosed in Korean Patent Application Publication No. 10-2009-0 1 1 5040 is an exemplified (meth) acrylate resin having an aromatic ring. The disclosed resin composition comprises: (a) a (meth) acrylate unit comprising at least one (meth) acrylate derivative; (b) an aromatic group comprising a chain having a hydroxy group and an aromatic moiety; a unit; (c) a styrene unit comprising at least one styrene derivative. Units (a) to (c) may be included in the resin composition in the form of a copolymer, or two or more of the units (a) to (c) may be contained in the form of a copolymer -17-201229162. In the resin composition. The method of forming the (meth) acrylate resin film is not particularly limited. For example, a material such as a (meth) acrylate resin, a polymer, and an additive may be completely mixed by a suitable method to form a thermoplastic resin composition, and then a film may be formed from the thermoplastic resin composition. In another example, a solution such as a (meth) acrylate resin solution, a polymer solution, and an additive solution may be separately prepared and mixed with each other to form a film using the mixed solution. The thermoplastic resin composition can be obtained by premixing the above raw materials using a suitable mixer such as an omni-mixer; and kneading and extruding the mixture. The mixture can be kneaded and extruded by any mixer. For example, a single screw extruder, a twin screw extruder or a pressure kneader can be used. Examples of the film formation method include a solution casting method, a melt extrusion method, a calendering method, and a compression method. A solution casting method or a melt extrusion method can be desirably used to form a film. Examples of the solvent which can be used in the solution casting method include: aromatic hydrocarbons G) such as benzene, toluene, and xylene; aliphatic hydrocarbons such as cyclohexane and decalin: esters such as ethyl acetate and butyl acetate Ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; alcohols such as methanol, ethanol, isopropanol, butanol, isobutanol, methyl cellosome (cellosove), ethyl cellosolve And butyl cellosolve; ethers such as tetrahydrofuran and dioxane; halogenated hydrocarbons such as dichloromethane, chloroform and carbon tetrachloride; dimethylformamide; and dimethylhydrazine. The solvents listed may be used alone or in combination. For example, a drum casting machine, a belt casting machine, or a rotary coating -18-201229162 can be used as a means for performing a solution casting method. Examples of the melt extrusion method include a T-die method and an expansion method. allowable! A film is formed in the temperature range of 5 3 to 3 5 〇 〇c. For example, it can be at 200. (: to 300. (: film formation in the temperature range. In the case of forming a film using the T-die method, the T_mold can be mounted on the front end of the uniaxial or twin-screw extruder to roll the extruded film In this case, when the film is extruded and rolled, the film can be uniaxially elongated (oriented) by adjusting the temperature of the rolled portion of the film in the extrusion direction. Or the film can be Simultaneously or continuously biaxially elongated (orientated) in a direction perpendicular to the extrusion method (biaxial orientation). The acrylic film may be a non-oriented film or an oriented film. In the latter case, the acrylic film It may be a uniaxially oriented film or a biaxially oriented film. If the acrylic film is a biaxially oriented film, the acrylic film may be oriented simultaneously or continuously in the biaxial direction in the biaxial direction. When the acrylic film is a biaxially oriented film, the quality of the acrylic film can be improved due to improved mechanical strength. The oriented acrylic film can contain another thermoplastic resin to prevent phase difference increase and maintain optical uniformity. .
當丙烯酸系膜由該熱塑性樹脂組成物所形成時，該丙 Μ酸系膜可以在接近該熱塑性樹脂組成物之玻璃轉換溫度 之溫度下被延長》例如，該丙烯酸系膜可以在（玻璃轉換 溫度-3 0 °C )至（玻璃轉換溫度+100 °C )之溫度範圍內被 延長。在另一實例中，該丙烯酸系膜可以在（玻璃轉換溫 度-2 0°C )至（玻璃轉換溫度+80°C )之溫度範圍內被延長 。若該丙烯酸系膜之延長溫度低於（玻璃轉換溫度-30 °C -19 - 201229162 )’則該丙烯酸系膜不可充分地被延長。另一方面，若該 丙烯酸系膜之延長溫度高於（玻璃轉換溫度+1 0 0 °c )，則 因爲樹脂組成物流動，該丙烯系膜不可被安定地延長。 延長比率基於面積比率被定義，且該丙烯酸系膜可具 有在1.1至25範圍內之延長比率。例如，該延長比率可 以在1.3至10之範圍內。若該丙烯酸系膜之延長比率低 於1.1’則該丙烯酸系膜之耐用性因爲不充分之延長而不 可被改良。此外，儘管該丙烯酸系膜之延長比率大於25 ，延長效果也不能如預期地增加。 該丙烯酸系膜可以在10% /分鐘至20,000% /分鐘 之延長速率下被延長。例如，該丙烯酸系膜可以在100% /分鐘至1〇，〇〇〇% /分鐘之延長速率下被延長。若該延長 速率低於10% /分鐘，則要充份地延長該丙烯酸系膜可 能極耗時，導致該丙烯酸系膜製造成本增加。另一方面，When the acrylic film is formed of the thermoplastic resin composition, the propionic acid film may be elongated at a temperature close to the glass transition temperature of the thermoplastic resin composition. For example, the acrylic film may be at (glass transition temperature) -3 0 °C) is extended in the temperature range (glass transition temperature +100 °C). In another example, the acrylic film may be extended over a temperature range (glass transition temperature - 2 0 ° C) to (glass transition temperature + 80 ° C). If the elongation temperature of the acrylic film is lower than (glass transition temperature -30 ° C -19 - 201229162 ), the acrylic film may not be sufficiently elongated. On the other hand, if the elongation temperature of the acrylic film is higher than (glass transition temperature + 0 0 °c), the propylene film cannot be stably extended because the resin composition flows. The elongation ratio is defined based on the area ratio, and the acrylic film may have an elongation ratio in the range of 1.1 to 25. For example, the elongation ratio can be in the range of 1.3 to 10. If the elongation ratio of the acrylic film is less than 1.1', the durability of the acrylic film cannot be improved because it is insufficiently extended. Further, although the elongation ratio of the acrylic film is more than 25, the elongation effect cannot be increased as expected. The acrylic film can be elongated at a prolonged rate of 10% / minute to 20,000% / minute. For example, the acrylic film can be extended at an elongation rate of 100% / minute to 1 Torr, 〇〇〇% / minute. If the elongation rate is less than 10% / min, it may be extremely time consuming to sufficiently lengthen the acrylic film, resulting in an increase in the production cost of the acrylic film. on the other hand,
若該延長速率高於20，000%/分鐘，則該丙烯酸系膜可能 被撕裂。 Q 在該丙烯酸系膜被延長後，該丙烯酸系膜可被熱處理 (退火），以使該丙烯酸系膜之光學均向特性及機械特性 被安定化。該熱處理之條件不特別限定。例如，該熱處理 可以在此技藝中已知之條件下進行。 該光學膜可被表面處理以改良黏合性。例如，可以在 該光學膜之至少一面上進行鹼處理、電暈處理、及電漿處 理之至少一種。 本發明也提供一種包含偏光器及光學膜之偏光板。在 -20- 201229162 本文中，由上述底漆組成物所形成之底漆層被形成在該光 學膜之至少一面上，且該光學膜被貼合至該偏光器之任一 面或二面上。例如，本發明提供一種如圖2及3中所示之 偏光板。參考圖2及3，偏光器1設置在光學膜3與4之 間，且由該底漆組成物所形成之底漆層5設置在該偏光器 1與該光學膜3及4之至少一者之間。該底漆組成物及可 施加該底漆組成物之該光學膜已在以上描述中被描述。 黏合層可以形成在該偏光器之任一面或二面上。在本 發明中，該黏合層可以由PVA樹脂所形成。若該黏合層 係由包含乙醯乙醯基之退化的PVA樹脂所形成，則該黏 合劑層之黏合性可進一步被增加。例如，該黏合層可以由 Gohsefimer Z-100、Z-200、Z-200H、Z-210、Z-220、Z-3 20 (由 Nippon Synthetic Chemical Industry Co., Ltd 製 造）所形成。然而，可用以形成該黏合層之材料不限於此 〇 在本發明中，該底漆層可以形成在以下二者之間：具 有約90°水接觸角之高疏水性丙烯酸系膜·•與具有5(Γ或 更小之水接觸角的水性黏合劑或高親水性偏光器，藉此透 過具有不同表面特性之二偏光膜與該偏光器之間的緩衝功 能，改良黏合性。 本發明之偏光板可具有在35%至45 %之範圍的透光 率及98或更高之偏光度。 本發明也提供一種製備包含底漆層之光學膜的方法。 該方法包含：將底漆組成物塗覆在該光學膜之至少一面上 -21 - 201229162 ;及將該光學膜乾燥。該光學膜已在以上描述中被描述。 可以藉由使用條式印刷法或凹版照像印刷方法及/或 狹縫鑄模塗覆機，以該底漆組成物塗覆該光學膜以形成該 底漆層。該底漆層可具有在50奈米至1，000奈米範圍內 之厚度。例如，該底漆層可具有在100奈米至8 00奈米範 圍內之厚度。在另一實例中，該底漆層可具有在2 00奈米 至500奈米範圍內之厚度。若該底漆層厚度小於50奈米 ，則不可獲得足夠之黏合性。另一方面，若該底漆層厚度 Q 大於1，000奈米，則該底漆層不可充份地被乾燥，或水可 分散粒子之滑動特性不令人滿意，因爲該水可分散粒子被 埋在該底漆層中。 例如，可以使用對流爐，在1 〇〇°C至1 20°C之溫度範 圍內使該光學膜的乾燥進行1至5分鐘，但不限於此。乾 燥溫度可以在上述範圍內依照該底漆組成物之塗覆的進程 而變化。若該光學膜是定向膜，則乾燥溫度可維持等於或 低於該光學膜之玻璃轉換溫度（Tg )。若進行該光學膜之 G) 乾燥同時延長該光學膜，則乾燥溫度可設定成延長溫度， 其等於或低於該光學膜之分解溫度（Td )。 另外，可以表面處理該光學膜以改良黏合性。在此情 況中，該方法可以另外包含在該光學膜之至少一面上進行 鹼處理、電暈處理、及電漿處理之至少一種。特別地，若 該光學膜是一種不包含內酯環之丙烯酸系膜，則可能需要 在該光學膜上進行此種表面處理。 依照本發明，因有該底漆組成物之令人滿意的透光率 -22- 201229162 ，包含該底漆組成物之偏光板可以不減低透光率’且因該 底漆組成物所提供之令人滿意的黏合性’該偏光板之耐用 性被改良。特別地，即使在該底漆組成物被施加至偏光板 的情況中，該偏光板之透光率、偏光度、及彩色特性以基 本上與使用PVA黏合劑卻無該底漆組成物的情況相同的 方式變化。因此，該底漆組成物可用於大量生產線中卻不 需改變處理條件。 使用本發明之底漆組成物及偏光板，可以製造多種電 子裝置諸如液晶顯示器。亦即，本發明之底漆組成物及偏 光器之使用不限於此。換言之，由該底漆組成物所形成之 底漆層可用於如此技藝中所知的電子裝置。 本發明現在將更詳細地參考實例來描述。然而，提供 以下實例以僅供描述本發明，且因此本發明不限於以下實 例。 實例1 經底漆處理之丙烯酸系膜製備如下：藉由混合33.3 克之CK-PUD-F ( Chokwang-聚胺基甲酸酯分散液：具有 30%固體含量之水溶液），1.4克之膠態矽石（具有20% 固體含量之水溶液），及65.3克之純水，製備10重量％ 之底漆組成物；使用#3條，將該底漆組成物施加至經電 暈處理之丙烯酸系膜至約300奈米之厚度；及該丙烯酸系 膜在l〇〇°C下乾燥5分鐘。 使用具有50微米厚度之AX膜產品（由Nippon -23- 201229162If the elongation rate is higher than 20,000%/min, the acrylic film may be torn. Q After the acrylic film is elongated, the acrylic film can be heat-treated (annealed) so that the optical uniformity and mechanical properties of the acrylic film are stabilized. The conditions of the heat treatment are not particularly limited. For example, the heat treatment can be carried out under conditions known in the art. The optical film can be surface treated to improve adhesion. For example, at least one of alkali treatment, corona treatment, and plasma treatment may be performed on at least one side of the optical film. The present invention also provides a polarizing plate comprising a polarizer and an optical film. In -20-201229162 herein, a primer layer formed of the above primer composition is formed on at least one side of the optical film, and the optical film is attached to either or both sides of the polarizer. For example, the present invention provides a polarizing plate as shown in Figs. 2 and 3. Referring to Figures 2 and 3, a polarizer 1 is disposed between the optical films 3 and 4, and a primer layer 5 formed of the primer composition is disposed on at least one of the polarizer 1 and the optical films 3 and 4. between. The primer composition and the optical film to which the primer composition can be applied have been described in the above description. The adhesive layer may be formed on either or both sides of the polarizer. In the present invention, the adhesive layer may be formed of a PVA resin. If the adhesive layer is formed of a degraded PVA resin containing an acetamidine group, the adhesiveness of the adhesive layer can be further increased. For example, the adhesive layer can be formed of Gohsefimer Z-100, Z-200, Z-200H, Z-210, Z-220, Z-3 20 (manufactured by Nippon Synthetic Chemical Industry Co., Ltd.). However, the material that can be used to form the adhesive layer is not limited thereto. In the present invention, the primer layer can be formed between: a highly hydrophobic acrylic film having a water contact angle of about 90° and having 5 (a water-based adhesive or a highly hydrophilic polarizer having a water contact angle of Γ or less, thereby improving the adhesion by the buffering function between the two polarizing films having different surface characteristics and the polarizer. The polarizing light of the present invention. The sheet may have a light transmittance in the range of 35% to 45% and a degree of polarization of 98 or higher. The present invention also provides a method of preparing an optical film comprising a primer layer. The method comprises: coating a primer composition Coating on at least one side of the optical film - 21 to 201229162; and drying the optical film. The optical film has been described in the above description. It can be used by using a strip printing method or a gravure printing method and/or narrow a slot die coater coating the optical film with the primer composition to form the primer layer. The primer layer may have a thickness in the range of 50 nm to 1,000 nm. For example, the primer The layer can have a range from 100 nm to 800 nm The thickness of the inner layer. In another example, the primer layer may have a thickness in the range of 200 nm to 500 nm. If the thickness of the primer layer is less than 50 nm, sufficient adhesiveness is not obtained. On the one hand, if the thickness Q of the primer layer is more than 1,000 nm, the primer layer is not sufficiently dried, or the sliding property of the water-dispersible particles is unsatisfactory because the water-dispersible particles are buried. In the primer layer, for example, the convection oven can be used to dry the optical film for 1 to 5 minutes in a temperature range of 1 〇〇 ° C to 1 20 ° C, but is not limited thereto. The drying temperature can be The above range varies depending on the progress of the coating of the primer composition. If the optical film is an oriented film, the drying temperature can be maintained at or below the glass transition temperature (Tg) of the optical film. G) Drying while extending the optical film, the drying temperature can be set to an extended temperature which is equal to or lower than the decomposition temperature (Td) of the optical film. In addition, the optical film can be surface treated to improve adhesion. In this case, the method may additionally comprise performing at least one of alkali treatment, corona treatment, and plasma treatment on at least one side of the optical film. In particular, if the optical film is an acrylic film that does not contain a lactone ring, it may be necessary to perform such a surface treatment on the optical film. According to the present invention, the polarizing plate comprising the primer composition can not reduce the light transmittance due to the satisfactory light transmittance of the primer composition-22-201229162 and is provided by the primer composition Satisfactory adhesion 'The durability of the polarizing plate is improved. In particular, even in the case where the primer composition is applied to the polarizing plate, the light transmittance, the degree of polarization, and the color characteristics of the polarizing plate are substantially different from the case where the PVA adhesive is used without the primer composition. The same way changes. Therefore, the primer composition can be used in a mass production line without changing the processing conditions. Using the primer composition of the present invention and a polarizing plate, various electronic devices such as liquid crystal displays can be manufactured. That is, the use of the primer composition and the polarizer of the present invention is not limited thereto. In other words, the primer layer formed from the primer composition can be used in electronic devices known in the art. The invention will now be described in more detail with reference to examples. However, the following examples are provided for the purpose of describing the invention only, and thus the invention is not limited to the following examples. Example 1 A primer-treated acrylic film was prepared by mixing 33.3 g of CK-PUD-F (chokwang-polyurethane dispersion: an aqueous solution having a solid content of 30%), and 1.4 g of colloidal vermiculite. (Aqueous solution having a solid content of 20%), and 65.3 g of pure water, to prepare a primer composition of 10% by weight; using #3, the primer composition was applied to the corona-treated acrylic film to about 300 The thickness of the nano; and the acrylic film was dried at 10 ° C for 5 minutes. Use AX film products with a thickness of 50 microns (by Nippon -23- 201229162
Shokubai製造）作爲丙烯酸系膜，且該丙烯酸系膜在 5 〇w/平方公尺/分鐘之條件下經電暈處理，以製備經電 暈處理之丙烯酸系膜。偏光板製備如下。將PVA黏合劑 施加至偏光器之雙面上。該經底漆處理之丙烯酸系膜被設 置在該偏光器之一面上，且經鹼處理之TAC膜被設置在 該偏光器之另一面上。然後，使用加壓滾筒加壓該經底漆 處理之丙烯酸系膜該偏光器及該TAC膜且使用熱空氣將 之在80 °C下乾燥5分鐘。 實例2 以如實例1之相同方式製備偏光板，除了藉由混合 33.3克之CK-PUD-F(Chokwang-聚胺基甲酸酯分散液： 具有30%固體含量之水溶液），1.4克之膠態矽石（具有 20%固體含量之水溶液），及65.3克之純水，製備10重 量％之底漆組成物；使用#5.條，將該底漆組成物施加至 經電暈處理之丙烯酸系膜至約5 00奈米之厚度。 實例3 以如實例1之相同方式製備偏光板，除了藉由混合 33.3 克之 SUPERFLEX210( Nippon Shokubai-聚胺基甲酸 酯分散液：具有30%固體含量之水溶液），1.4克之膠態 矽石（具有20%固體含量之水溶液），及65.3克之純水 ，製備1 〇重量％之底漆組成物；使用#5條’將該底漆組 成物施加至經電暈處理之丙烯酸系膜至約500奈米之厚度 201229162 比較用實例1 以如同實例1之相同方式製備偏光板，除了藉由溶解 PVA樹脂（平均聚合度：2400，及平均皂化度：99.9%) 於純水中製備4.5重量％之PVA水溶液；且使用#5條， 將該PVA水溶液施加至經電暈處理之丙烯酸系膜至約500 奈米厚度。 比較用實例2 以如同實例1之相同方式製備偏光板，除了使用#5 條，將10重量％之底漆組成物（WLS 202 : DIC-聚胺基 甲酸酯分散液）施加至經電暈處理之丙烯酸系膜至約500 奈米厚度。 ( 比較用實例3 以如同實例1之相同方式製備偏光板，除了不處理底 漆組成物。 實驗實例1 :對偏光板之黏合性及防水性之評估 1.黏合性 用以下方式評估偏光板之黏合性。在將2公分寬部份 之丙烯酸系膜固定後，使用TA. XT. Plus組織分析儀（由 Stable Micro System製造）觀察5公分長之90°剝離。結 -25- 201229162 果顯示於以下表1中。 在需要3.0N/2公分或更高以將丙烯酸系膜從偏光板 剝除的情況中，該偏光板可以在再加工程序中由面板安全 地脫離。 2.防水性 用以下方式評估該偏光板之防水性。偏光板之一面使 用黏合劑貼合至玻璃板，且該貼合至該玻璃板之偏光板浸 在60°C之恆溫水浴8小時。然後，觀察偏光器之收縮及 丙烯酸系膜（丙烯酸系保護膜）之剝離。結果顯示於以下 表1中。 [表1] 保護膜 底漆 水接觸 角 黏合性（N/2cm) 防水性 丙烯基表面 8小時後 Ex. 1 A/TAC PI 75 4.0 未剝離 Ex. 2 A/TAC PI 75 5.0 未剝離 Ex. 3 A/TAC P2 74 3.0 未剝離 C.E. 1 A/TAC P3 50 0.3 剝離 C.E.2 A/TAC P4 88 0.3 剝離 C.E. 3 A/TAC X 88 0.1 剝離 * Ex.:實例 * C · E ·:比較用實例 * A :丙烯酸系膜 * TAC:三乙醯基纖維素膜 * P1:CK-PUD-F 10% * P2:SF210 10% * P3:聚乙烯醇4.5% * P4:WLS 202 1 0% -26- 201229162 參考表1，在使用本發明之底漆組成物的情況中，黏 合性是3.0 N/ 2公分或更大。因此，依照本發明，可以 安定地進行再加工程序，且可製備具有改良防水性之偏光 板。 如上述，依照本發明，該底漆組成物具有良好黏合性 且可被應用至現有之偏光板的層合程序中，卻不減低該偏 ( 光板之透明性且無需另外之程序及裝置。特別地，在使用 丙烯酸系膜作爲偏光器之保護膜的情況中，該底漆組成物 加強該丙烯酸系膜與該偏光器之間的黏合，卻不損壞該偏 光板之光學特性及耐用性。 雖然本發明已連同該等例是的具體例被顯示且描述， 精於此技藝之人士將明瞭：可以有改良及變化，卻不偏離 如所附之申請專利範圍所定義之本發明的精神及範圍。 ( 【圖式簡單說明】 本發明之以上及其他方面、特徵、及其他優點將由以 下詳細描述連同所附之圖更清楚地被了解，其中： 圖1是說明相關技藝之偏光板的視圖； 圖2是說明依照本發明之一具體例的偏光板的視圖； 及 圖3是說明依照本發明之另一具體例的偏光板的視圖 -27- 201229162 【主要元件符號說明】 1 :偏光器 3，4 :光學膜 5 :底漆層 -28-As an acrylic film, the acrylic film was subjected to corona treatment at 5 〇 w/m 2 /min to prepare a corona-treated acrylic film. The polarizing plate was prepared as follows. A PVA adhesive is applied to both sides of the polarizer. The primer-treated acrylic film is disposed on one side of the polarizer, and the alkali-treated TAC film is disposed on the other side of the polarizer. Then, the primer-treated acrylic film of the polarizer and the TAC film were pressurized with a pressure roller and dried at 80 ° C for 5 minutes using hot air. Example 2 A polarizing plate was prepared in the same manner as in Example 1 except that by mixing 33.3 g of CK-PUD-F (Chokwang-polyurethane dispersion: an aqueous solution having a solid content of 30%), 1.4 g of colloidal hydrazine 10% by weight of a primer composition was prepared from stone (having an aqueous solution having a solid content of 20%) and 65.3 g of pure water; the primer composition was applied to the corona-treated acrylic film using #5. A thickness of about 500 nanometers. Example 3 A polarizing plate was prepared in the same manner as in Example 1, except that by mixing 33.3 g of SUPERFLEX 210 (Nippon Shokubai-polyurethane dispersion: an aqueous solution having a solid content of 30%), 1.4 g of colloidal vermiculite (having a 20% solids aqueous solution), and 65.3 grams of pure water, to prepare a 1% by weight of the primer composition; the #5 strip' is used to apply the primer composition to the corona treated acrylic film to about 500 Thickness of rice 201229162 Comparative Example 1 A polarizing plate was prepared in the same manner as in Example 1, except that 4.5 wt% of PVA was prepared in pure water by dissolving PVA resin (average degree of polymerization: 2400, and average degree of saponification: 99.9%). An aqueous solution; and using #5, the PVA aqueous solution was applied to the corona treated acrylic film to a thickness of about 500 nm. Comparative Example 2 A polarizing plate was prepared in the same manner as in Example 1, except that using #5, 10% by weight of a primer composition (WLS 202: DIC-polyurethane dispersion) was applied to the corona The treated acrylic film is to a thickness of about 500 nm. (Comparative Example 3 A polarizing plate was prepared in the same manner as in Example 1 except that the primer composition was not treated. Experimental Example 1: Evaluation of adhesion and water repellency of the polarizing plate 1. Adhesiveness The polarizing plate was evaluated in the following manner. Adhesiveness: After fixing a 2 cm wide acrylic film, a TA. XT. Plus tissue analyzer (manufactured by Stable Micro System) was used to observe a 90° peel of 5 cm. The knot-25-201229162 is shown in In the following Table 1. In the case where 3.0 N/2 cm or more is required to peel the acrylic film from the polarizing plate, the polarizing plate can be safely detached from the panel in the reworking process. The water repellency of the polarizing plate was evaluated. One side of the polarizing plate was bonded to the glass plate with an adhesive, and the polarizing plate attached to the glass plate was immersed in a constant temperature water bath at 60 ° C for 8 hours. Then, the polarizer was observed. Shrinkage and peeling of the acrylic film (acrylic protective film). The results are shown in the following Table 1. [Table 1] Protective film primer water contact angle adhesion (N/2cm) Waterproof acryl-based surface after 8 hours Ex. 1 A/TAC PI 75 4.0 Unpeeled Ex. 2 A/TAC PI 75 5.0 Unpeeled Ex. 3 A/TAC P2 74 3.0 Unpeeled CE 1 A/TAC P3 50 0.3 Stripped CE2 A/TAC P4 88 0.3 Stripped CE 3 A/TAC X 88 0.1 Peeling * Ex.: Example * C · E ·: Comparative example * A : Acrylic film * TAC: Triethylene phthalocyanine film * P1: CK-PUD-F 10% * P2: SF210 10% * P3: polyvinyl alcohol 4.5% * P4: WLS 202 1 0% -26- 201229162 Referring to Table 1, in the case of using the primer composition of the present invention, the adhesiveness is 3.0 N / 2 cm or more. According to the present invention, the reworking process can be carried out stably, and a polarizing plate having improved water repellency can be prepared. As described above, according to the present invention, the primer composition has good adhesion and can be applied to a layer of an existing polarizing plate. In the process, the bias is not reduced (the transparency of the light plate and no additional procedures and devices are required. In particular, in the case where an acrylic film is used as the protective film of the polarizer, the primer composition reinforces the acrylic film Bonding with the polarizer without damaging the optical characteristics and durability of the polarizing plate. The present invention has been shown and described with respect to the specific embodiments of the invention, and those skilled in the art will understand that the invention can be modified and changed without departing from the spirit and scope of the invention as defined by the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS [0009] The above and other aspects, features, and other advantages of the present invention will become more apparent from 2 is a view illustrating a polarizing plate according to a specific example of the present invention; and FIG. 3 is a view illustrating a polarizing plate according to another specific example of the present invention -27-201229162 [Explanation of main components] 1 : Polarizer 3, 4: Optical film 5: Primer layer-28-