TWI257944B - Acrylic pressure sensitive adhesive for the polarizing film - Google Patents

Acrylic pressure sensitive adhesive for the polarizing film Download PDF

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TWI257944B
TWI257944B TW092104878A TW92104878A TWI257944B TW I257944 B TWI257944 B TW I257944B TW 092104878 A TW092104878 A TW 092104878A TW 92104878 A TW92104878 A TW 92104878A TW I257944 B TWI257944 B TW I257944B
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Prior art keywords
psa
group
acrylic
layer
parts
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TW092104878A
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Chinese (zh)
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TW200417589A (en
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Suk-Ky Chang
In-Cheon Han
Se-Ra Kim
In-Seok Hwang
Sergey Belyaev
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Lg Chemical Ltd
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J133/00Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
    • C09J133/04Homopolymers or copolymers of esters
    • C09J133/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09J133/062Copolymers with monomers not covered by C09J133/06
    • C09J133/066Copolymers with monomers not covered by C09J133/06 containing -OH groups
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04Homopolymers or copolymers of esters
    • C09D133/06Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/10Homopolymers or copolymers of methacrylic acid esters
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/10Adhesives in the form of films or foils without carriers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00Adhesives in the form of films or foils
    • C09J7/30Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/38Pressure-sensitive adhesives [PSA]
    • C09J7/381Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • C09J7/385Acrylic polymers
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00Additional features of adhesives in the form of films or foils
    • C09J2301/20Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
    • C09J2301/208Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive layer being constituted by at least two or more adjacent or superposed adhesive layers, e.g. multilayer adhesive
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00Presence of (meth)acrylic polymer
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2433/00Presence of (meth)acrylic polymer
    • C09J2433/006Presence of (meth)acrylic polymer in the substrate

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polarising Elements (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

The present invention relates to an acrylic PSA composition, and more particularly to an acrylic pressure-sensitive adhesive (PSA) composition that comprises the first PSA layer comprising a compound having a positive stress optical coefficient and an acrylic copolymer, and the second PSA layer comprising an acrylic copolymer. An acrylic PSA composition of the present invention can solve the light leakage problem of a liquid crystal display panel by reducing birefringence due to contraction of a polarizer attached to the liquid crystal display panel while maintaining key properties, such as durability and cuttability.

Description

1257944 玖、發明說明 (發明說明應敘明:發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明) 【發明所屬之技術領域】 本發明與一種丙烯酸感壓黏合劑(以下稱「PSA」)成分 有關。尤其,本發明的丙烯酸PSA成分可對黏附到液晶顯 示板上之偏光膜因收縮而產生的雙折射予以減低,所以能 5 在不犧牲諸如耐久性及可切割性之類重要性質的情況下解 決液晶顯不板的漏光問題。 【先前技術】 液晶顯示器一般包括一液晶片及若干偏光膜,再利用 10 適當的感壓黏合劑(P s A)將液晶片及偏光膜組合而製成成 品。此外,液晶顯示器亦可包括相位推遲膜或光學循環膜, 以便增進液晶顯示器的功能。 液晶顯不為'的二個主要組件包括1)在兩片玻璃板之 間妥善對齊的液晶層,其中在内部另設有一濾色片及透明 15 電子層,和2)偏光膜,如有必要時,還包括利用適當黏合 劑或PSA層而層合到玻璃板上的相位推遲膜片及其它功能 性膜片。 偏光膜包括偏光元件,例如拉伸聚乙烯醇(PVA)基膜片 之分子鏈,或利用PVA膜片之水解或聚氯乙烯(PVC)之脫 20 氫氯酸反應所製備的烯烴結構而朝定向對齊的碘基化合物 或二氯偏光材料,且該偏光元件的至少一面是由諸如三乙 醯基纖維素(TAC)、聚碳酸酯、聚氧化二曱苯、聚曱基丙烯 酸甲酯、和環烯烴共聚物等之類護膜予以保護。此外,偏 光膜可包括具有各向異性分子校準的推遲膜片和/或用於 0續次頁(發明說明頁不敷使用時,請註記並使用續頁) ^257944 廣視角補償及增亮的功能性膜片,例如一種光學設計的液 晶膜片。 ^前述的膜片因為是以分子結構及成分各自不同的材料 5氣備,所以各具有不同的物理、化學及光學特性。當液晶 顯示器經過長時間的使用時,彼此之分子結構及成分不同 的成分材料即老化,以致該等材料的分子結構跟著改變。 例如,1)材料間因溫度變化而造成的線性膨脹係數差異, ^使各組合層產生連續應力,和2)具有既存分子校準的材 料因應力鬆弛而變形,以致偏光膜的光學性質隨之改變, 1〇導致液晶顯示器發生嚴重的漏光。若是採用非雙折射材 料,雖可解決這問題,但卻可能讓其它種種重要性質的品 貝又損。尤其,為黏附住偏光膜,在使用需有系統地控制 雙折射的PSA時,極難保持黏合劑的原本能力。 為防偏光膜漏光,應先消除偏光膜收縮而造成的應 15力,但從高溫及高濕條件時的收縮及膨脹行為來看,因玻 璃板上的偏光膜及PSA具有不同的形狀穩定特性,因而難 以去除遠專材料間的應力積聚。 就玻璃板上的偏光膜及PSA層之間的應力而言,試圖 將其鬆弛的美國第5,795,650號專利曾揭示一種由塑化劑 20組件構成的黏合劑能有效鬆弛因偏米膜收縮而產生的應 力。·然而,它卻不能完全消除漏光問題,且因塑化劑組件 可能減損PSA的黏合性質,以致可能造成耐久性的問題, 例如氣泡與邊緣翹曲的問題。此外,若用刀子切割偏光膜 產品時,因為黏合劑成分的軟度增加,以致塑化劑組件可 -5- 1257944 - 發明說明_胃 能污染偏光膜。 另外,曰本第平成1〇-279907號專利曾揭示一種高分 子量丙烯基聚合物與一種分子量在30,000以下之丙烯基聚 合物的混合物能減輕應力以防發生漏光。然而,它也未完 5 全消除漏光問題,且因可能產生大量氣泡及邊緣勉曲情 形’以致黏合的可靠性受人懷疑。再者,如同美國第 5,795,650號專利,偏光膜也因切割作業而可能被污染。 10 15 大體上,PSA包括橡膠基、丙烯基、及矽基材料,其 中丙烯基PSA因為高度的光學性能及黏合品質而被廣泛採 用。由於丙烯基黏合劑可設計成略為加壓就讓分子的鏈流 動性變不佳,所以丙烯基黏合劑在室溫條件下略為加壓即 展現出良好的黏合特性。丙烯酸PSA的黏合力大致為1〇〇 到3000 gm/m。丙烯基PSA材料的分子特性,例如分子量 及分布,交聯密度與成分,均是影響pSA敎性的主要因 素,它們可由高黏合強度及内聚強度來控制。 然而 20 便用把讓應力鬆弛而減輕偏光膜之應力積聚的 般卻顯現出在高溫及高濕度條件下耐抗氣泡及邊 緣翹曲的形成及增長方面的耐久性 Wφ %;八& 疋而廷對顯不板的 I·生月b來說十分重要。此外,包括具离法 ^ ^ ^ ^, 、阿机動性之黏合板片的 ^ ^^ ^ 姑口劑易於延伸到產品外 面’,導致產品受污染。1257944 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明 发明"PSA") related ingredients. In particular, the acrylic PSA component of the present invention can reduce the birefringence caused by shrinkage of the polarizing film adhered to the liquid crystal display panel, so that it can be solved without sacrificing important properties such as durability and cuttability. The liquid crystal display does not have a light leakage problem. [Prior Art] A liquid crystal display generally includes a liquid crystal film and a plurality of polarizing films, and a liquid crystal film and a polarizing film are combined by using a suitable pressure-sensitive adhesive (P s A) to form a finished product. In addition, the liquid crystal display may also include a phase retardation film or an optical circulation film to enhance the function of the liquid crystal display. The two main components of the liquid crystal display are: 1) a liquid crystal layer properly aligned between two glass plates, wherein a color filter and a transparent 15 electron layer are additionally provided inside, and 2) a polarizing film, if necessary Also included are phase retardation diaphragms and other functional membranes laminated to a glass sheet using a suitable binder or PSA layer. The polarizing film comprises a polarizing element, such as a molecular chain of a stretched polyvinyl alcohol (PVA) based membrane, or an olefin structure prepared by hydrolysis of a PVA membrane or dehydrochlorination of polyvinyl chloride (PVC). Oriented aligned iodine-based compound or dichloro-polarizing material, and at least one side of the polarizing element is composed of, for example, triethyl fluorenyl cellulose (TAC), polycarbonate, polyoxyn benzene, polymethyl methacrylate, and A protective film such as a cycloolefin copolymer or the like is protected. In addition, the polarizing film may include a retardation film with anisotropic molecular calibration and/or for a continuation page (please note and use the continuation page when the invention page is not available) ^257944 Wide viewing angle compensation and brightening A functional membrane, such as an optically designed liquid crystal membrane. ^The aforementioned film has different physical, chemical and optical properties because it is made of a material having a different molecular structure and composition. When the liquid crystal display is used for a long period of time, the constituent materials different in molecular structure and composition from each other are aged, so that the molecular structure of the materials changes. For example, 1) the difference in linear expansion coefficient between materials due to temperature changes, ^ causes continuous stress in each combined layer, and 2) the material with the existing molecular calibration is deformed by stress relaxation, so that the optical properties of the polarizing film change accordingly. , 1〇 causes serious leakage of the liquid crystal display. If non-birefringent materials are used, this problem can be solved, but it may damage other important properties. In particular, in order to adhere to the polarizing film, it is extremely difficult to maintain the original ability of the adhesive when using a PSA that requires systematic control of birefringence. In order to prevent light leakage of the polarizing film, the 15 force caused by the shrinkage of the polarizing film should be eliminated first, but the shrinkage film and PSA on the glass plate have different shape stability characteristics from the shrinkage and expansion behavior under high temperature and high humidity conditions. Therefore, it is difficult to remove the stress accumulation between the materials. In the case of the stress between the polarizing film and the PSA layer on the glass plate, U.S. Patent No. 5,795,650, which is incorporated herein by reference, discloses that the adhesive consisting of the plasticizer 20 component can effectively relax due to shrinkage of the rice film. Stress. However, it does not completely eliminate the light leakage problem, and the plasticizer component may detract from the adhesion properties of the PSA, which may cause durability problems such as bubbles and edge warpage. Further, when the polarizing film product is cut with a knife, since the softness of the binder component is increased, the plasticizer component can be contaminated with a polarizing film. In addition, the Japanese Patent Application Laid-Open No. Hei. No. Hei. No. Hei. However, it has not completely eliminated the light leakage problem, and the reliability of the adhesion is suspected because of the possibility of generating a large number of bubbles and edge distortion. Furthermore, as in U.S. Patent No. 5,795,650, the polarizing film may also be contaminated by the cutting operation. 10 15 In general, PSAs include rubber-based, acryl-based, and fluorene-based materials, of which propylene-based PSAs are widely used due to their high optical properties and bonding qualities. Since the propylene-based adhesive can be designed to be slightly pressurized to deteriorate the molecular chain mobility, the propylene-based adhesive exhibits good adhesion characteristics under slight pressure at room temperature. The adhesion of acrylic PSA is approximately 1 到 to 3000 gm/m. The molecular properties of propylene-based PSA materials, such as molecular weight and distribution, crosslink density and composition, are the main factors affecting the pSA enthalpy. They can be controlled by high adhesion strength and cohesive strength. However, in the case of 20, the stress relaxation is relaxed to reduce the stress accumulation of the polarizing film, but the durability W?% in the formation and growth resistance of the bubble and the edge warp under high temperature and high humidity conditions is exhibited; eight & The court is very important for the I. In addition, the ^ ^^ ^ guar agent, which has a flexible sheet of the method of ^ ^ ^ ^, is easily extended to the outside of the product, resulting in contamination of the product.

PSA 求’例如耐久性及 良PSA之漏光的目 因此,必須在偏光膜產品之主要需 可切割性幾乎不改變的情沉下,達到改 的0 -6- 1257944 發明說明,續頁 【發明内容】 本發明之目的是提供一種能在偏光膜之主要需求,例 如耐久性及可切割性幾乎不改變的情況下,顯著改良psA 之漏光問題的丙婦酸PSA成分。達成此舉的方式是將黏附 5到液晶顯示板上之偏光膜因收縮而產生的雙折射予以減 低。 本發明的另一目的是提供一種使用該成分的偏光膜。 為達成這些目的,本發明提供一種丙烯酸基pSA成 分’其包括: 10 a) 一種包含有下列材料的第一層PSA層, i) 一種具正應力光學係數的化合物,和 ii) 一種丙烯酸共聚物;以及 b) —種包含有一丙烯酸共聚物的第二層pSA層。 15 【實施方式】 現將本發明詳予說明於後。 長時間使用液晶顯示器時,即會因為偏光單元的收縮 應力而使複合膜的光學性質改變,以致發生複雜的光學崎 變,此稱為突發雙折射現象或漏光問題。為防止膜片發出 2〇雙折射問題,本案發明人曾調查過液晶顯示器的各種不同 、、且件’例如偏光單元、液晶顯示板、和感壓黏合劑(pSA) 層等。結果發現若將尺寸穩定性各自列的材料黏結在一 起時,即會因為複合膜中的應力累積而發生雙折射 ,以致 造成漏光。為求解決漏光問題,本發明提供一種PSA成分, 1257944 - 發明說明®Μ 該成分則包括一種能對系統中同一應力場所發生之雙折射 予以自動補償的光學活性組分。隨著液晶顯示器的增大, PSA的光學特性也變得越來越重要。因此,本案發明人試 圖形成一種多層的PSA膜,其中一層含有一種能對該PSA 5 膜之偏移雙折射予以補償的組分,另一層則含有一種能增 進耐久性及再加工性的組分。 由於PSA層在高溫時需要強大的内聚力,所以可用適 當交聯的黏彈性材料以便讓黏合層具有極佳的耐久性。交 聯PSA的分子結構通常是部份交聯,而在部份交聯分子受 10 到應力時,由於交聯部份的應力沒辦法充分消除,因此交 聯部份的分子鏈係朝特定方向承受應力。PSA的彈力特性 與橡膠或彈性體相似,而PSA的主鏈則是朝著所施應力的 方向對齊。因此,當材料受到應力時,即顯示出正與負的 雙折射,而在收縮應力下的偏光單元則是以大部份丙烯酸 15 PSA成分之交聯線性分子中的負應力雙折射為其特徵。 當本發明的PSA未承受應力時,因為PSA仍保持各向 同性,所以PSA的分子不會改變液晶顯示器的光學性質。 只有因為偏光膜收縮使PSA受到應力時,它才展現出雙折 射補償,以便消除顯示器的漏光。也就是說,經由對系統 20 應力場的瞭解而利用光補償技術,即可區別出本發明與其 它發明的不同。 此外,本發明的PSA及使用該PSA的偏光膜可用如同 製備習用PSA層的類似程序而製備。PSA seeks, for example, the durability and the light leakage of good PSA. Therefore, it must be changed under the condition that the main cutting property of the polarizing film product is hardly changed. 0 -6-1257944 Description of the Invention, Continued [Invention Content It is an object of the present invention to provide a propylene glycol PSA component which can significantly improve the light leakage problem of pSA in the case where the main requirements of the polarizing film, such as durability and cuttability, are hardly changed. The way to achieve this is to reduce the birefringence caused by shrinkage of the polarizing film adhered to the liquid crystal display panel. Another object of the present invention is to provide a polarizing film using the composition. To achieve these objects, the present invention provides an acrylic based pSA composition comprising: 10 a) a first layer of PSA comprising the following materials, i) a compound having a positive stress optical coefficient, and ii) an acrylic copolymer And b) a second layer of pSA comprising an acrylic copolymer. [Embodiment] The present invention will now be described in detail. When the liquid crystal display is used for a long time, the optical properties of the composite film are changed due to the contraction stress of the polarizing unit, so that a complicated optical sag occurs, which is called a sudden birefringence phenomenon or a light leakage problem. In order to prevent the film from emitting a birefringence problem, the inventors of the present invention have investigated various kinds of liquid crystal displays, such as a polarizing unit, a liquid crystal display panel, and a pressure sensitive adhesive (pSA) layer. As a result, it has been found that if the materials of the respective dimensional stability are bonded together, birefringence occurs due to stress accumulation in the composite film, resulting in light leakage. In order to solve the problem of light leakage, the present invention provides a PSA component, 1257944 - Description of the Invention® This component comprises an optically active component that automatically compensates for the birefringence occurring at the same stress site in the system. As liquid crystal displays increase, the optical properties of PSAs become more and more important. Accordingly, the inventors of the present invention have attempted to form a multilayer PSA film in which one layer contains a component which compensates for the offset birefringence of the PSA 5 film, and the other layer contains a component which enhances durability and reworkability. . Since the PSA layer requires strong cohesion at high temperatures, a suitably crosslinked viscoelastic material can be used to provide excellent adhesion to the adhesive layer. The molecular structure of cross-linked PSA is usually partially cross-linked. When the partially cross-linked molecule is subjected to 10 stress, the cross-linking part of the molecular chain is in a specific direction because the stress of the cross-linked part cannot be completely eliminated. Withstand stress. The elastic properties of PSA are similar to rubber or elastomer, while the main chain of PSA is aligned in the direction of the applied stress. Therefore, when the material is stressed, it shows positive and negative birefringence, while the polarizing element under contraction stress is characterized by negative stress birefringence in the crosslinked linear molecules of most acrylic 15 PSA components. . When the PSA of the present invention is not stressed, since the PSA remains isotropy, the molecules of the PSA do not change the optical properties of the liquid crystal display. Only when the PSA is stressed due to shrinkage of the polarizing film does it exhibit birefringence compensation to eliminate light leakage from the display. That is to say, by utilizing the optical compensation technique by understanding the stress field of the system 20, the difference between the present invention and other inventions can be distinguished. Further, the PSA of the present invention and the polarizing film using the same can be prepared by a similar procedure as the conventional PSA layer.

本發明的丙烯基PSA成分包括二層;a)第一層的PSA -8- 1257944 _The propylene-based PSA component of the present invention comprises two layers; a) the first layer of PSA -8-1257944 _

發明說明$賣;E 層包括i) 一種具有正應力光學係數的化合物和ii) 一種丙 烯酸共聚物,另外b)第二層的PSA層包括一種丙烯酸共 聚物。BRIEF DESCRIPTION OF THE INVENTION The $E layer comprises i) a compound having a positive stress optical coefficient and ii) an acrylic copolymer, and b) the second layer of the PSA layer comprises an acrylic copolymer.

尤其,以重量為準,本發明第一層的PSA包括0.001 5 到40份的一種具有正應力光學係數的化合物,100份的一 種丙烯酸共聚物,該共聚物則包括75到99.89份的一種具 有Q到C12烷基群的(甲基)丙烯酸酯單體,0.1到20份的 一種α、β不飽和羧酸單體,和0.01到5份的一種具有羥基 群的功能性單體。 10 以重量為準,第一層的PSA可另包括0.01到10份的 一種多功能性異氰酸鹽交聯劑。In particular, the PSA of the first layer of the present invention comprises, by weight, from 0.001 to 40 parts of a compound having a positive stress optical coefficient, 100 parts of an acrylic copolymer, and the copolymer comprises from 75 to 99.89 parts. a (meth) acrylate monomer of Q to a C12 alkyl group, 0.1 to 20 parts of an α, β unsaturated carboxylic acid monomer, and 0.01 to 5 parts of a functional monomer having a hydroxyl group. 10 The first layer of PSA may further comprise from 0.01 to 10 parts of a multifunctional isocyanate crosslinking agent, based on the weight.

具有正應力光學係數的該a) i)組分可用共聚合或摻混 方式而與丙烯酸共聚物合用。可供當作組分的材料有許多 種,但以軸向具有不對稱分子結構的組分為宜。此外,組 15 分的用量顯然要少,以便第一層PSA層的效能保持不變。 為達此目的,所用者係一種在軸向具有不對稱結構的組 分。若將PSA樹脂與具有正應力光學係數的組分按適當比 例進行聚合,以供形成具有一種從主鏈支化出之側鏈的結 構,或採取習用的摻混技術,均可製備本發明的成分,所 20 製備的成分則具有與黏合塗層或層合所用之習用PSA類似 的特性。 在本發明中,具有正應力光學係數的組分可包括從軸 向具有不對稱分子結構和正應力光學係數之化合物所構成 群組中選用的一種化合物或二種以上的混合物。本發明所 9- 1257944 _ 發明說明$賣Μ 用的那些具有正應力光學係數的化合物,易於混合到各式 各樣組分的丙烯基PSA,並使這PSA之玻璃化轉變溫度的 變化減至最低。The a) i) component having a positive stress optical coefficient can be used in combination with an acrylic copolymer by copolymerization or blending. There are many kinds of materials which can be used as components, but it is preferred to have a component having an asymmetric molecular structure in the axial direction. In addition, the amount of the 15 points is obviously less, so that the performance of the first layer of the PSA layer remains unchanged. For this purpose, the user is a component having an asymmetric structure in the axial direction. The PSA resin can be prepared by polymerizing a PSA resin with a component having a positive stress optical coefficient in an appropriate ratio for forming a structure having a side chain branched from a main chain, or adopting a conventional blending technique. Ingredients, the ingredients prepared in 20 have similar properties to conventional PSAs used in adhesive coatings or lamination. In the present invention, the component having a positive stress optical coefficient may include a compound selected from the group consisting of a compound having an asymmetric molecular structure and a positive stress optical coefficient or a mixture of two or more. The present invention is in the form of a compound having a positive stress optical coefficient, which is easy to mix into a propylene-based PSA of various components and reduces the change in the glass transition temperature of the PSA to lowest.

具有正應力光學係數的組分可包括一種化合物或二種 5 以上的混合物,且在該等組分均勻分散於PSA之中時,即 展現出正應力光學係數。尤其,當所施應力讓黏合劑的主 鏈朝一定向對齊時,該組分亦朝主鏈的方向對齊,以致改 變PSA層的雙折射。當層合膜的複合結構因應力而顯現出 雙折射時,該組分可補償各膜片所產生的雙折射。 10 為補償層合膜的雙折射,如使用少量具有正應力光學The component having a positive stress optical coefficient may include one compound or a mixture of two or more, and exhibits a positive stress optical coefficient when the components are uniformly dispersed in the PSA. In particular, when the applied stress causes the main chain of the adhesive to be aligned in a certain direction, the composition is also aligned in the direction of the main chain, so that the birefringence of the PSA layer is changed. When the composite structure of the laminated film exhibits birefringence due to stress, the composition compensates for the birefringence produced by each of the films. 10 to compensate for the birefringence of the laminated film, such as using a small amount of positive stress optics

係數的組分時,該組分的雙折射宜大。當組分具有剛性分 子結構和軸向非對稱性時,該組分即能依照PSA雙折射變 化而產生的所施應力有效對齊。也就是說,當組分的分子 具有剛性結構和軸向非對稱性時,該等分子易於朝著PSA 15 主鏈的方向對齊,因而產生正雙折射。考慮到各層的這種 個別的光學活動,包括保護膜片及PSA層之層合偏光單元 在特定應力場下所產生的複雜雙折射即能被有效控制。 此外,當具有正光學係數的組分屬於低分子量時,PSA 的彈性及彈力即增加,因而該組分的分子量宜在2000或以 20 下。 •具有正應力光學係數的組分可包括芳族化合物 (aromatic compounds)或脂環族化合物(alicyclic compounds),其中芳族化合物係根據是否存有芳香環的取 代基或根據芳族化合物的種類而將其類別分成芳族晶體化 -10- 1257944 發明說明,¾胃 一、及諸如膽固醇型(cholesteric)與層列型(smectic)化合 物之類的芳族液晶化合物。 具有正應力光學係數的代表範例宜為一種以下列化學 結構式1或化學結構式2表示的芳族化合物: 化學結構式1When the composition of the coefficient is used, the birefringence of the component is preferably large. When the component has a rigid molecular structure and axial asymmetry, the component is effectively aligned in accordance with the applied stress generated by the PSA birefringence change. That is, when the molecules of the component have a rigid structure and axial asymmetry, the molecules tend to align toward the main chain of the PSA 15 and thus produce positive birefringence. Considering the individual optical activity of the layers, the complex birefringence produced by the laminated polarizing elements of the protective film and the PSA layer under specific stress fields can be effectively controlled. Further, when the component having a positive optical coefficient belongs to a low molecular weight, the elasticity and elasticity of the PSA are increased, and thus the molecular weight of the component is preferably 2,000 or 20. • The component having a positive stress optical coefficient may include an aromatic compound or an alicyclic compound, wherein the aromatic compound is based on whether or not a substituent of the aromatic ring is present or according to the kind of the aromatic compound. Dividing its classification into aromatic crystals-10-1257944 Description of the invention, an organic liquid crystal compound such as a cholesteric and smectic compound. A representative example having a positive stress optical coefficient is preferably an aromatic compound represented by the following chemical structural formula 1 or chemical structural formula 2: Chemical structural formula 1

10 X ’ Y ’ Rl,和R2分別或同時是從氫、氰、氣、溴、羥 基、二甲胺、異丙苯基(cumyl)、和q到Cm的烷基、烷氧 基、與芳基構成之群組中選用的取代基; 在化學結構式1及化學結構式2中:10 X ' Y ' Rl, and R 2 are respectively alkyl, alkoxy, and aromatic from hydrogen, cyanide, gas, bromine, hydroxyl, dimethylamine, cumyl, and q to Cm. Substituents selected from the group consisting of bases; in Chemical Formula 1 and Chemical Formula 2:

A 是-CH=N-,-Ν=Ν·,·Ν=Ν(0)-,_C00、_CH20_, -c^rYco-,-COO-CH2-,-〇C-,-C C-,-S-,-S02-,AR1)-, 15 -ch^n-ocr^-n^ch-, C = C.〇(R1)-〇(r2).c = C-5-C=N-0(R1)-®(R2).N = C-5 -ON-dKRb-c^Rb-C^C-,或一個聯接萘或蔥之各核心的橋 連鍵(其中R1和R2分別或同時是從Ci到C2〇烷基、烷氧基、 與芳基構成之群組中選用的取代基);以及 20 a及b是個0到3的整數(如果a = 〇,b是個1到3的 -11- 1257944 _ 發明說明,續頁 整數;否則b是個0到3的整數)。 以化學結構式1或化學結構式2表示的芳族化合物包 括聯苯(biphenyl)、反式二苯乙稀(trans-stilbene)、偶氮苯 (azobenzene)、對-三聯苯(p-terphenyl)、間-三聯苯 5 (m-terphenyl)、異丙苯基苯曱酸鹽(cumylphenylbenzoate)、 二苯乙快(diphenylacetylene) 、 4-乙基二苯 (4-ethylbiphenyl) 、 4’-苯基-4-二苯基碳腈 (4,-pentyl-4-biphenyl carbonitrile)、4-二苯基破腈 (4_biphenyl carbonitrile)、4’-苯基二苯(4’-pentylbiphenyl)、 10 4’-苯氧基-4·二苯基碳腈(4’-penthoxy_4-biphenyl carbonitrile) 、 4’-己基-4-二苯基碳腈 (4’-hexyl-4-biphenylcarbonitrile)、4’-辛基-4-二苯基碳腈 (4’-octyl-4-biphenylcarbonitrile)、反式_4_辛基-4’-乙氧基二 苯乙稀(trans-4-octyl-4’-ethoxystilbene)、萘(naphthalene)、 15 蒽(anthracene)、4’_曱氧基苯亞曱基氨基二苯乙烯 (4’-methoxybenzylideneaminostilbene),4’-甲氧基苯亞曱基 氨基偶 II苯(4’-methoxybenzylideneaminoazobenzene) ’ 其衍 生物及其混合物,但芳族化合物並不以前述者為限。 此外,當芳族化合物沒有X或Y的取代基,或它們的 20 尺寸小時,具有正應力光學係數的芳族化合物包括諸如反 式二苯乙烯、三聯苯、二苯乙炔、或聯苯之類的晶體材料。 當X或Y衍生物具有適當結合的偏光-非偏光或手徵性 (chiral)群組時,具有X衍生物或Y衍生物的材料便是層列 型或膽固醇型液晶化合物,芳族化合物或脂環族化合物的 -12- 1257944 !- 發明說明_胃 範例已有人說明過。(Polymer Liquid Crystals (聚合物液 晶),A. C. Cifferri,W.R. Krigbaum,R.B. Meyer, Academic Press (學術新聞),1982年)。 由於成分的分子結構及可混合性對光學性質與PSA 5 性能很重要,所以化合物應具有如同芳族化合物和脂環族 化合物的正應力光學係數。也就是說,任一具有各向異性 電子分子結構的化合物均可採用,並無限制。A is -CH=N-, -Ν=Ν·,·Ν=Ν(0)-, _C00, _CH20_, -c^rYco-, -COO-CH2-,-〇C-,-C C-,- S-,-S02-,AR1)-, 15 -ch^n-ocr^-n^ch-, C = C.〇(R1)-〇(r2).c = C-5-C=N-0 (R1)-®(R2).N = C-5 -ON-dKRb-c^Rb-C^C-, or a bridging bond connecting the cores of naphthalene or onion (where R1 and R2 are respectively or simultaneously a substituent selected from the group consisting of Ci to C2 alkyl, alkoxy, and aryl; and 20 a and b are integers from 0 to 3 (if a = 〇, b is 1 to 3 - 11- 1257944 _ Description of the invention, continuation page integer; otherwise b is an integer from 0 to 3. The aromatic compound represented by Chemical Formula 1 or Chemical Formula 2 includes biphenyl, trans-stilbene, azobenzene, p-terphenyl. , m-terphenyl, cumylphenylbenzoate, diphenylacetylene, 4-ethylbiphenyl, 4'-phenyl- 4-, 4-pentyl-4-biphenyl carbonitrile, 4-biphenylcarbonitrile, 4'-pentylbiphenyl, 10 4'-benzene 4'-penthoxy_4-biphenylcarbonitrile, 4'-hexyl-4-biphenylcarbonitrile, 4'-octyl-4 -4'-octyl-4-biphenylcarbonitrile, trans-4-octyl-4'-ethoxystilbene, naphthalene (trans-4-octyl-4'-ethoxystilbene) Naphthalene), 15th anthracene, 4'-methoxybenzylideneaminostilbene, 4'-methoxybenzylideneamino phenylene (4'-methoxybenzylideneamino) Azobenzene)' is a derivative and a mixture thereof, but the aromatic compound is not limited to the foregoing. Further, when the aromatic compound has no substituent of X or Y, or their 20 size is small, the aromatic compound having a positive stress optical coefficient includes, for example, trans stilbene, terphenyl, diphenylacetylene, or biphenyl. Crystal material. When the X or Y derivative has a properly combined polarized-non-polarized or chiral group, the material having the X derivative or the Y derivative is a smectic or cholesteric liquid crystal compound, an aromatic compound or Cycloaliphatic compounds -12- 1257944 !- Description of the invention _ Stomach examples have been described. (Polymer Liquid Crystals, A. C. Cifferri, W. R. Krigbaum, R. B. Meyer, Academic Press, 1982). Since the molecular structure and miscibility of the component are important for optical properties and PSA 5 performance, the compound should have a positive stress optical coefficient such as an aromatic compound and an alicyclic compound. That is, any compound having an anisotropic electron molecular structure can be employed without limitation.

具有正應力光學係數之化合物的選擇很多,端視諸如 雙折射及黏合性質之類的特性而定。為保持黏合特性,以 10 重量為準,這成分的份量宜為0.001到40份,但以0.01到 30份較佳,如為0.05到25份時最佳。這成分可用一般的 方式與一 PSA摻混。此外,這成分可被結合到PSA中而成 為一種多層PSA結構。There are many choices for compounds with positive stress optical coefficients, depending on characteristics such as birefringence and adhesion properties. In order to maintain the adhesive property, the amount of the component is preferably from 0.001 to 40 parts, preferably from 0.01 to 30 parts, preferably from 0.05 to 25 parts, based on 10 parts by weight. This ingredient can be blended with a PSA in a conventional manner. In addition, this component can be incorporated into the PSA to form a multilayer PSA structure.

PSA的黏彈性質主要取決於聚合物的分子量,其分 15 布,及其分子結構而定。尤其,這些性質較宜以其分子量 來確定。因此,該a)i)項的丙烯基共聚物的分子量為200,000 到2,000,000,但以600,000到1,500,000較佳,另以重量為 準,就100份的該丙烯酸共聚物而言,它包括i) 75到99.89 份的一種包括C!到c12烧基酯,但以c2到c8烧基酯為宜 20 的(曱基)丙烯酸酯單體,以及ii) 一種可跟一交聯劑起反應 的功能性單體。以重量為準,該(甲基)丙烯酸酯單體的含量 宜為75到99.89份,但以80到98份較佳。 當烧基(甲基)丙稀酸酯具有一個長鏈烧基群時,這黏 合劑的内聚力便低,因此宜採用一種C2到C8的烷基群, -13- 1257944 !- 發明說明_胃 以防内聚力減低。當烷基(曱基)丙烯酸酯過量時,其内聚力 減低。以重量為準,當烷基(曱基)丙烯酸酯的含量低於75 份時,黏合劑的黏合力即降低,而且可能增加其成本。 (甲基)丙烯酸單體包括(曱基)丙烯酸丁酯 5 (butyl(meth)acrylate),(曱基)丙嫦酸-2-乙基己西旨 (2-ethylhexyl(meth)acrylate),(曱基)丙烯酸乙酯 (ethyl(meth)acrylate),(曱基)丙嫦酸甲酉旨 (methyl(meth)acrylate),(曱基)丙稀酸正丙酯 (n-propyl(meth)acrylate),(曱基)丙烯酸異丙酯 10 (isopropyl(meth)acrylate),(甲基)丙嫦酸丁 特酉旨 (t-butyl(meth)acrylate),(甲基)丙稀酸戊酯 (pentyl(meth)acrylate),(甲基)丙稀酸正辛酯 (n-octyl(meth)acrylate),(曱基)丙稀酸異壬酯 (isononyl(meth)acrylate)及其混合物,但並不以前述者為 15 限。該等單體可另包括此處未提及的各種丙烯基單體和特 定目的所用的乙烯基單體。 以重量為準,就100份的丙烯酸共聚物而言,該ii) 項的丙烯酸共聚物中的功能性單體可包括0.1到20份的 α、β不飽和羧酸單體,或0.01到5份的一種具有羥基群的 20 功能性單體,及其混合物。不飽和α、β羧酸單體的濃度宜 為0.5到15份。該第ii)項的功能性單體使本發明的PSA 具有黏合強度或内聚力。如果不飽和α、β羧酸單體的含量 低於0.1份時,黏合強度的改良效果即減低;若是大於20 份時,則因内聚力增加而使流動性減低,以致減損黏合強 -14- 1257944 發明說明續頁 度。不飽和α、β羧酸單體包括丙烯酸(acrylic acid)、甲基丙 稀酸(methacrylic acid)、丙烯酸二聚物(acrylic acid dimmer)、衣康酸(itaconic acid)、馬來酸(maleic acid)、馬 來酐(maleic anhydride)、及其混合物,但它們並不以前述 5 者為限。 具有羥基群並與交聯劑起反應的功能性單體,因為其 化學鍵足以承受PSA在高溫時的内聚破壞,所以使PSA具 有内聚力。以重量為準,就100份的該丙烯酸共聚物而言, 這種具有羥基群之功能性單體的數量宜為0.01到5份。如 10 果具有羥基群之功能性單體的數量低於〇·〇1份時,PSA在 高溫時即發生内聚破壞;若是大於5份時,即減損高溫時 的柔軟性。該等功能性單體包括(甲基)丙烯酸-2-羥乙酉旨 (2-hydroxyethyl(meth)acrylate),(曱基)丙烯酸-2_ 羥丙酉旨 (2-hydroxypropyl(meth)acrylate),(甲基)丙烯酸-2-羥基乙二 15 醇(2-hydroxyethyleneglycol(meth)acrylate),(甲基)丙稀酸 -2,經基丙二醇(2,hydroxypropyleneglycol(meth)acrylate),及 其混合物,但它們並不以前述者為限。具有羥基群的乙缚 基單體只要適用於本發明,亦可用於本發明。前述各單體 及其混合物均可使用。 20 只要符合本發明的目標,其它的功能性單體亦可使 用”或取代不飽和α、β羧酸單體和具有羥基的功能性單體 使用。例如,讓多功能性環氧基化合物與一羧酸的功能團 起反應,或讓多功能性氮丙^(aziridine)與羧酸的一功 起反應,或使用一種紫外線固化劑,就可使PSA交聯。此 -15- 1257944 ~~—~~— 發明說明續頁 外’為使本發明的PSA具有黏合力,可用一種偏光材料來 取代不飽和α、β羧酸單體。多功能性化合物可用來產生交 聯結構’因而PSΑ的黏合可靠性也增加。 該a) ii)項的丙烯基共聚物可用溶液聚合,光聚合,本 5 體聚合,懸浮聚合,或乳液聚合等方式予以製備。尤其, 該丙烯基共聚物宜在50到140 °C的溫度利用溶液聚合予 以製備,且在單體被均勻混合時,宜添加引發劑。The viscoelastic properties of PSA depend mainly on the molecular weight of the polymer, which is determined by its molecular structure. In particular, these properties are preferably determined by their molecular weight. Therefore, the propylene-based copolymer of the item a) i) has a molecular weight of 200,000 to 2,000,000, but preferably 600,000 to 1,500,000, and further preferably the weight, based on 100 parts of the acrylic copolymer, includes i 75 to 99.89 parts of a (fluorenyl) acrylate monomer comprising C! to c12 alkyl ester but having a c2 to c8 alkyl ester of preferably 20, and ii) reacting with a crosslinking agent Functional monomer. The (meth) acrylate monomer is preferably contained in an amount of from 75 to 99.89 parts by weight, preferably from 80 to 98 parts by weight. When the alkyl (meth) acrylate has a long chain group, the cohesive force of the binder is low, so it is preferred to use a C2 to C8 alkyl group, -13-1257944 !- In order to prevent cohesion from decreasing. When the alkyl (mercapto) acrylate is excessive, its cohesive force is reduced. On the basis of weight, when the content of the alkyl (mercapto) acrylate is less than 75 parts, the adhesive force of the adhesive is lowered, and the cost thereof may be increased. The (meth)acrylic monomer includes butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, ( Ethyl (meth) acrylate, methyl (meth) acrylate, n-propyl (meth) acrylate ), (isopropyl) isopropyl (meth) acrylate, (methyl) methacrylate (t-butyl (meth) acrylate), (methyl) pentyl acrylate ( Pentyl(meth)acrylate), n-octyl(meth)acrylate, (ison) (isononyl(meth)acrylate) and mixtures thereof, but Not limited to the foregoing. These monomers may additionally include various propylene-based monomers not mentioned herein and vinyl monomers used for specific purposes. The functional monomer in the acrylic copolymer of the item ii) may comprise from 0.1 to 20 parts of the α,β unsaturated carboxylic acid monomer, or from 0.01 to 5, based on the weight of the acrylic copolymer. A 20 functional monomer having a hydroxyl group, and mixtures thereof. The concentration of the unsaturated α, β carboxylic acid monomer is preferably from 0.5 to 15 parts. The functional monomer of item ii) imparts adhesive strength or cohesion to the PSA of the present invention. If the content of unsaturated α and β carboxylic acid monomers is less than 0.1 part, the effect of improving the adhesion strength is reduced; if it is more than 20 parts, the fluidity is reduced due to the increase of cohesive force, so that the adhesion is weakened by the strong -14 - 1257944 Description of the invention. Unsaturated alpha and beta carboxylic acid monomers include acrylic acid, methacrylic acid, acrylic acid dimmer, itaconic acid, maleic acid. ), maleic anhydride, and mixtures thereof, but they are not limited to the foregoing five. A functional monomer having a hydroxyl group and reacting with a crosslinking agent imparts cohesive force to the PSA because its chemical bond is sufficient to withstand the cohesive failure of the PSA at high temperatures. The amount of such a functional monomer having a hydroxyl group is preferably from 0.01 to 5 parts by weight based on 100 parts of the acrylic copolymer. For example, when the amount of the functional monomer having a hydroxyl group is less than 1 part of 〇·〇, the PSA undergoes cohesive failure at a high temperature; and if it is more than 5 parts, the softness at a high temperature is degraded. The functional monomers include 2-hydroxyethyl(meth)acrylate, 2-hydroxypropyl(meth)acrylate, ( 2-hydroxyethyleneglycol (meth)acrylate, (meth)acrylic acid-2, hydroxypropyleneglycol (meth)acrylate, and mixtures thereof, but They are not limited to the foregoing. The ethylenic monomer having a hydroxyl group can also be used in the present invention as long as it is suitable for use in the present invention. Each of the foregoing monomers and mixtures thereof can be used. 20 Other functional monomers may also be used, or substituted for unsaturated alpha, beta carboxylic acid monomers, and functional monomers having hydroxyl groups, as long as they meet the objectives of the present invention. For example, multifunctional epoxides are The functional group of the monocarboxylic acid reacts, or the multifunctional aziridine reacts with the carboxylic acid, or an ultraviolet curing agent is used to crosslink the PSA. This -15- 1257944 ~~ —~~— Describing the Invention </ RTI> In order to make the PSA of the present invention have adhesive force, a polarizing material may be substituted for the unsaturated α, β carboxylic acid monomer. The multifunctional compound may be used to produce a crosslinked structure. The adhesion reliability is also increased. The propylene-based copolymer of the item a) ii) can be prepared by solution polymerization, photopolymerization, 5-mer polymerization, suspension polymerization, or emulsion polymerization, etc. In particular, the propylene-based copolymer is preferably 50. It is prepared by solution polymerization at a temperature of 140 ° C, and an initiator is preferably added when the monomers are uniformly mixed.

用於本發明的多功能性交聯化合物能定出聚合物主 鏈及側鏈的取向,在其供一黏彈性PSA使用時,有助於定 10 出聚合物主鏈及側鏈的取向。The multifunctional cross-linking compound used in the present invention is capable of determining the orientation of the polymer backbone and side chains, and when used in a viscoelastic PSA, contributes to the orientation of the polymer backbone and side chains.

該多功能性交聯化合物包括異氰酸g旨(isocyanate)交 聯劑,環氧基(epoxy-based)交聯劑,氮丙唆基 (aziridine-based)交聯劑,和金屬螯合(metai chelate-based) 交聯劑。異氰酸酯交聯劑包括二異氰酸曱苯酯(t〇lylene 15 diisocyanate) ’ 二苯基甲烷二異氰酸酯 (diphenylmethanediisocyanate),六亞甲基二異氛酸醋 (hexamethylenediisocyanate)及其與三甲醇丙烧 (trimethylolpropane)的加成物,但並不以前述者為限。 前述化合物可有效提供本發明所需的交聯結構,且其 20 可從本身與具有羥基群之功能團的各種結合中選用。 •在混合步驟期間,化合物與具有羥基群之功能團的交 聯反應並不會激烈發生,所以可被均勻塗布。等完成pSA 層的塗布,乾燥、與熟成步驟後,即可因交聯結構而形成 具有彈性及強大内聚強度的PSA層。PSA的強大内聚力提 -16- 1257944 !__ 發明說明_胃 升耐久性及可切割性。另外,PSA亦可使用公開的紫外線 或電子束技術予以交聯。 為控制PSA的性質,可另添加增黏劑。以重量為準, 增黏劑的用量為1到100份。當增黏劑的用量過多時,PSA 5 的内聚力可能減低。增黏劑包括(氫化)烴基樹脂 ((hydrogenated) hydrocarbon_based resin),(氫化)松香基樹 脂((hydrogenated) rosin-based resin),(氫化)松香酯基樹脂 ((hydrogenated) rosin ester-based resin),(氫化)帖婦基樹脂 ((hydrogenated) terpene resin),(氫化)帖稀紛樹脂 10 ((hydrogenated) terpene phenolic resin),聚合松香樹脂 (polymerized rosin resin),與聚合松香醋樹脂(polymerized rosin ester resin)。增黏劑也可包括前述的混合物。此外, 本發明的PSA成分可包括環氧樹脂與交聯劑,矽烷基偶聯 劑,塑化劑,抗氧化劑,紫外線穩定劑,強化劑’填充劑’ 15 及著色劑的混合物,端視本發明的最終用途而定。 就該b)項的第二層PSA層的丙烯酸共聚物而言’可用 與該a)項的第一層PSA層相同的丙烯酸共聚物。第二層的 PSA層宜含有一種具有優良耐久性及再加工性的丙烯酸黏 合劑。 20 第一及第二層PSA層的厚度可由其各自的功能來決 定。一般說來,厚度宜為10到50 μηι。由於第一層PSA層 具光學活性,所以可控制其厚度,端視第二層PSA層的光 學性質而定。以耐久性及再加工性的特性為基礎,第二層 PSA層的厚度宜為10到20 μηι。至於PSA的分子結構也宜 -17- 設計成讓第H層PSA層充分接合,以防界面應力造 成剝離。 本^明之丙烯酉夂PSA成分的交聯密度為i到95%,但 以30到90。/。較宜’若為4〇到8〇%更佳。 PSA成分可用各種方法製備,例如無規共聚合(random copoiymedzation) ’接枝共聚合,以及嵌段共聚合。另外, PSA成分也可用光聚合製備,其中採用了適當及習用的光 引發劑。 本發明的PSA成分並不以前述的帛途為限,本發明的 概念亦適用於⑪基、橡膠基、氨基甲酸S旨基、《基、與 環氧基PSA和黏合劑,熱活化嫩,以及祕黏合劑,不 卿材料型式。也就疋說’前述的成分適用於所有各種當作 光子材料的黏合劑層合’以便針對漏光問題提供雙折射補 償。 本發明的丙烯酸PSA成分能有效補償在應力下的複 雜雙折射同時保持PSA在高溫及高濕度時的性質與耐久 性,以及可切割性。 本發明也提供-種包括前述丙稀酸psA成分的偏光 =。本發明的偏細包括形成於偏光膜任一面的 PSA 層。 白用的組件可用於本發明所用的偏光膜及偏光元件。舉例 來说’習用偏光朗包括之膜片的製備方式是將埃或二向 色染料添加到諸如聚乙烯醇(P〇lyvinylalcohol)、聚乙烯醇縮 甲备(polyvinylf〇rmai)、聚乙烯醇縮乙酸(p〇iyVinyiacetai)、 乙稀(ethylene)、和一種醋酸乙婦醋共聚物(vinyi acetate 1257944 _ 發明說明_胃 copolymer)之類的聚乙烯醇基膜片,再將其拉伸,並使這膜 片與諸如三乙醯基纖維素(triacetyl cellulose)、聚碳酸醋 (polycarbonate)膜片、和聚謎(polyethersulfone)膜片之類 的護膜層合。 5 在偏光膜片上形成PSA層的方式是使用桿式塗布機 (bar-coater)把PSA溶液塗布到偏光膜片的表面上,再使其 乾燥;或將PSA溶液塗布到可剝離式材料上,再將其乾燥 以便形成PSA層,然後把psa層轉移到偏光膜的表面上, 並予熟成。 10 本發明PSA層可形成於偏光膜片的一面或兩面之 上此外,本發明的偏光膜可塗布一道護層,一道反射層, 一道防眩光層,一層推遲板,一層廣視角膜片,或若干層 增亮膜片。 本發明的PSA成分並不以前述的用途為限,本發明的 15概心亦適用於矽基、橡膠基、氨基曱酸酯基、聚酯基、與 銥氧基PSA和黏合劑,熱活化PSA,以及熱熔黏合劑,不 顺材料型式。也就是說,前述的成分適用於所有各種當作 光予材料的黏合劑層合,以便針對漏光問題提供雙折射補 償。 20 本發明提供一種包括前述多層式PSA成分的偏光膜。 ,本發明的偏光膜包括形成於偏光膜片The multifunctional crosslinking compound includes an isocyanate crosslinking agent, an epoxy-based crosslinking agent, an aziridine-based crosslinking agent, and a metal chelate (metai). Chelate-based) Crosslinker. The isocyanate crosslinking agent includes t〇lylene 15 diisocyanate 'diphenylmethanediisocyanate, hexamethylenediisocyanate and its trimethyl propylene hydride ( An adduct of trimethylolpropane), but not limited to the foregoing. The foregoing compounds are effective for providing the crosslinked structure required for the present invention, and the 20 thereof can be selected from various combinations of itself and a functional group having a hydroxyl group. • During the mixing step, the crosslinking reaction of the compound with the functional group having a hydroxyl group does not occur fiercely, so it can be uniformly coated. After completion of the coating of the pSA layer, drying, and the ripening step, a PSA layer having elasticity and strong cohesive strength can be formed due to the crosslinked structure. The powerful cohesion of PSA -16-1257944 !__ Description of invention _ stomach durability and cuttability. In addition, PSA can be crosslinked using open UV or electron beam technology. To control the properties of the PSA, an additional tackifier can be added. The tackifier is used in an amount of from 1 to 100 parts by weight. When the amount of tackifier is too much, the cohesion of PSA 5 may be reduced. The tackifier includes (hydrogenated hydrocarbon-based resin), (hydrogenated) rosin-based resin, (hydrogenated rosin ester-based resin) , (hydrogenated terpene resin), (hydrogenated terpene phenolic resin), polymerized rosin resin, and polymerized rosin (polymerized rosin) Ester resin). The tackifier may also include the aforementioned mixtures. In addition, the PSA component of the present invention may comprise a mixture of an epoxy resin and a crosslinking agent, a decyl coupling agent, a plasticizer, an antioxidant, a UV stabilizer, a reinforcing agent 'filler' 15 and a coloring agent. Depending on the end use of the invention. For the acrylic copolymer of the second PSA layer of the item b), the same acrylic copolymer as the first layer of the PSA layer of the item a) can be used. The second layer of the PSA layer preferably contains an acrylic adhesive having excellent durability and reworkability. The thickness of the first and second layers of the PSA layer can be determined by their respective functions. In general, the thickness is preferably 10 to 50 μηι. Since the first layer of PSA layer is optically active, its thickness can be controlled, depending on the optical properties of the second layer of PSA layer. The thickness of the second layer of the PSA layer is preferably 10 to 20 μm based on the characteristics of durability and reworkability. As for the molecular structure of PSA, it is also desirable to design the H-layer PSA layer to be sufficiently bonded to prevent the interface stress from being peeled off. The cross-linking density of the PSA component of the present invention is from i to 95%, but from 30 to 90. /. It is better if it is 4〇 to 8〇%. The PSA component can be prepared by various methods such as random copoiymedzation 'graft copolymerization, and block copolymerization. Alternatively, the PSA component can be prepared by photopolymerization using suitable and conventional photoinitiators. The PSA component of the present invention is not limited to the aforementioned route, and the concept of the present invention is also applicable to the 11-base, rubber-based, carbamate-based group, "base, epoxy group PSA and binder, heat activated, And the secret adhesive, the material type is not clear. That is to say, the aforementioned ingredients are applicable to all kinds of adhesive laminations as photonic materials to provide birefringence compensation for light leakage problems. The acrylic PSA component of the present invention is effective in compensating for complex birefringence under stress while maintaining the properties and durability of PSA at high temperatures and high humidity, as well as cuttability. The present invention also provides a polarized light comprising the aforementioned acrylic acid psA component. The trim of the present invention includes a PSA layer formed on either side of the polarizing film. The white component can be used for the polarizing film and the polarizing element used in the present invention. For example, the conventional polarizer includes a film prepared by adding an angstrom or a dichroic dye to, for example, polyvinyl alcohol (P〇lyvinylalcohol), polyvinylf〇rmai (polyvinylf〇rmai), polyvinyl alcohol. a polyvinyl alcohol-based membrane such as acetic acid (p〇iyVinyiacetai), ethylene, and a copolymer of acetic acid (Vinyi acetate 1257944 _ invention _ stomach copolymer), which is then stretched and This film is laminated with a film such as a triacetyl cellulose, a polycarbonate film, and a polyethersulfone film. 5 The PSA layer is formed on the polarizing film by applying a PSA solution onto the surface of the polarizing film using a bar-coater and drying it; or applying the PSA solution to the peelable material. Then, it is dried to form a PSA layer, and then the psa layer is transferred onto the surface of the polarizing film and preliminarily formed. 10 The PSA layer of the present invention may be formed on one or both sides of the polarizing film. Further, the polarizing film of the present invention may be coated with a protective layer, a reflective layer, an anti-glare layer, a retardation plate, a wide viewing angle film, or Several layers of brightening film. The PSA component of the present invention is not limited to the aforementioned use, and the 15 of the present invention is also applicable to sulfhydryl, rubber-based, amino phthalate-based, polyester-based, decyloxy PSA and binder, heat activated. PSA, as well as hot melt adhesives, do not conform to the material type. That is, the foregoing ingredients are suitable for all kinds of adhesive laminations as light-preventing materials to provide birefringence compensation for light leakage problems. 20 The present invention provides a polarizing film comprising the aforementioned multilayer PSA component. The polarizing film of the present invention comprises a polarizing film formed on the film

任一面的PSA 層。習用的組件可用於本發明所用的偏光膜片及偏光元 件j舉例來說,習用偏光膜所包括之膜片的製備方式是將 碘或一向色染料添加到諸如聚乙烯醇、聚乙烯醇縮曱醛、 -19- 1257944 發明說明續頁 聚乙烯醇縮乙搭、乙烯、和一種醋酸乙烯醋共聚物之類的 聚乙烯醇基膜片,再將其拉伸,並使這膜片與諸如三乙酿 基纖維素、聚碳酸酉旨膜片、和聚喊膜片之類的護膜層合。 在偏光㈣上龍PSA層的料是使轉式塗布機 5把PSA溶液塗布到偏光膜片的表面上,再使其乾燥;或將 PSA冷液塗布到可剝離式材料上,再將其乾燥以便形成 PSA層,然後把PSA層轉移到偏光膜的表面上,並予熟成。 本發明PSA層可形成於偏光膜片的一面或兩面之 上。此外,本發明的偏光膜可塗布一道護層,一道反射層, 10 一道防眩光層,一層推遲板,一層廣視角膜片,或若干0層 增亮膜片。 θ 茲舉若干範例及比較範例,將本發明詳予說明於後。 然而,下列各範例僅供瞭解本發明而已,並非用以限制本 發明。 15【實例】 範例1 (丙浠酸共聚物的製備) 以重量為準,將94.5份丙烯酸正丁酯(ΒΑ),5份丙烯 酸(ΑΑ),和〇·5份(曱基)丙烯酸-2-羥乙醋(2-ΗΕΜΑ)的混合 20 物放入一個1000 cc且配備一溫度控制器和一氮氣回流冷 凝器的反應器中。添加100份的乙酸乙酯(EAc)。用氮氣將 反應器吹掃20分鐘,以便從反應器中清除氧氣,再添加 0.03份已用乙酸乙醋稀釋過的50%偶氮異二丁腈 (azobisisobutyronitrile,AIBN),並使它們在 65 °C 的溫度 -20- 1257944 發明說明_胃 一起反應10小時,據以獲得丙烯酸聚合物(PA-1)。採用聚 丙烯標準樣本量測,這丙烯酸聚合物的分子量為600,000 到 1,000,000。 (丙烯酸PSA的製備) 5 第一層PSA層的製備 以重量為準,就100份的丙烯酸基聚合物溶液而言, 使這丙烯酸基聚合物溶液(PA-1,50%的固體含量)與7份二 苯乙炔(diphenylacetylene)混合。然後,以高速混合方式添 加1.2份被乙酸乙酯稀釋到10%之二異氰酸甲苯加合物 10 (toluylene diisocyanate adduct,TDI-1)於其中,然後稀釋到 能在一離型膜片上具有良好塗布品質的特定濃度,接著乾 燥而製備出厚度為20 μιη的第一層均勻的PSA層。 第二層PSA層的製備 以重量為準,就100份的丙烯酸基聚合物溶液而言, 15 使這丙烯酸基聚合物溶液(ΡΑ-1,50%的固體含量)與1.5份 二異氰酸曱苯加合物(TDI-1)混合。以乙酸乙酯將其稀釋到 10%,係以高速混合方式添加,然後稀釋到能在一離型膜 片上具有良好塗布品質的特定濃度,接著乾燥而製備出厚 度為10 μηι的第二層均勻的PSA層。 20 偏光膜的製備 以層合機把黏合劑層合到厚度為185 μηι的碘基偏光膜 上,以製備具有第一及第二層PSA層的偏光膜。 範例2 除了以重量為準而在製備第一層PSA層時使用4份的 -21- 1257944 !- 發明說明 二苯乙炔和1.8份的二異氰酸甲苯加成物(TDI-1)外,其餘 均以如同範例1的程序來進行。 範例3The PSA layer on either side. A conventional component can be used for the polarizing film and the polarizing element j used in the present invention. For example, the conventional polarizing film includes a film prepared by adding iodine or a chromatic dye to, for example, polyvinyl alcohol or polyvinyl ketamine. Aldehyde, -19- 1257944 Description of the Invention A polyvinyl alcohol-based film such as polyvinyl acetal, ethylene, and a vinyl acetate vinegar copolymer, which is stretched and allowed to be bonded to a film such as Laminates such as ethyl cellulose, polycarbonate coatings, and filming films are laminated. In the polarizing (four) upper PSA layer, the material of the PSA layer is applied to the surface of the polarizing film by the rotary coater 5, and then dried; or the PSA cold liquid is applied to the peelable material, and then dried. In order to form a PSA layer, the PSA layer is then transferred to the surface of the polarizing film and preliminarily formed. The PSA layer of the present invention may be formed on one or both sides of the polarizing film. In addition, the polarizing film of the present invention may be coated with a protective layer, a reflective layer, 10 anti-glare layers, a retardation plate, a wide viewing angle film, or a plurality of 0-layer brightness enhancing films. θ cite several examples and comparative examples, and the present invention will be described in detail later. However, the following examples are merely for understanding the invention and are not intended to limit the invention. 15 [Examples] Example 1 (Preparation of a propionate copolymer) 94.5 parts of n-butyl acrylate (ΒΑ), 5 parts of acrylic acid (ΑΑ), and 〇·5 parts (mercapto) acrylic acid-2, based on the weight. A mixture of -hydroxyethyl vinegar (2-oxime) was placed in a 1000 cc reactor equipped with a temperature controller and a nitrogen reflux condenser. 100 parts of ethyl acetate (EAc) was added. The reactor was purged with nitrogen for 20 minutes to remove oxygen from the reactor, and 0.03 parts of 50% azobisisobutyronitrile (AIBN) diluted with ethyl acetate was added and allowed to pass at 65 °. Temperature of C-20-1257944 Description of the Invention The stomach was reacted together for 10 hours to obtain an acrylic polymer (PA-1). The acrylic polymer has a molecular weight of 600,000 to 1,000,000 using a standard sample of polypropylene. (Preparation of acrylic PSA) 5 Preparation of the first layer of PSA layer Based on the weight, the acrylic polymer-based solution (PA-1, 50% solid content) is made with respect to 100 parts of the acrylic-based polymer solution. 7 parts of diphenylacetylene were mixed. Then, 1.2 parts of toluylene diisocyanate adduct (TDI-1) diluted with ethyl acetate to 10% was added thereto in a high-speed mixing manner, and then diluted to a release film. A specific concentration of good coating quality was followed by drying to prepare a first layer of uniform PSA layer having a thickness of 20 μm. The second layer of PSA layer is prepared on a weight basis, and for 100 parts of the acrylic-based polymer solution, 15 is made of the acrylic-based polymer solution (ΡΑ-1, 50% solid content) and 1.5 parts of diisocyanate. The terpene benzene adduct (TDI-1) is mixed. It was diluted to 10% with ethyl acetate, added in a high-speed mixing manner, and then diluted to a specific concentration which can have a good coating quality on a release film, followed by drying to prepare a second layer having a thickness of 10 μm. A uniform PSA layer. 20 Preparation of polarizing film A binder was laminated on an iodine-based polarizing film having a thickness of 185 μm by a laminator to prepare a polarizing film having first and second PSA layers. Example 2 Except that 4 parts of -21-5797944 were used in the preparation of the first layer of PSA layer, except for the weight, and the toluene adduct (TDI-1) of 1.8 parts of diisocyanate was used. The rest were carried out in the same manner as in Example 1. Example 3

除了以重量為準而在製備丙烯酸共聚物時使用94.3 5 份丙烯酸正丁酯(BA),5份丙烯酸(AA),和0.7份(甲基)丙 烯酸-2-羥乙基酯(2-HEMA),以及在製備第一層PSA層時 使用6份的二苯乙炔外,其餘均以如同範例1的程序來進 行。 範例4 10 除了以重量為準而在製備丙烯酸共聚物時使用86.5 份丙烯酸正丁酯(BA),10份丙烯酸甲酯(MA),3份丙烯酸 (AA),和0.5份(曱基)丙烯酸-2-羥乙基酯(2-HEMA),以及 在製備第一層PSA層時使用7份的二苯乙炔外,其餘均以 如同範例1的程序來進行。 15 範例5In addition to the weight, 94.3 5 parts of n-butyl acrylate (BA), 5 parts of acrylic acid (AA), and 0.7 parts of 2-hydroxyethyl (meth) acrylate (2-HEMA) were used in the preparation of the acrylic copolymer. ), and using 6 parts of diphenylacetylene in the preparation of the first layer of PSA layer, the rest were carried out in the same manner as in Example 1. Example 4 10 86.5 parts of n-butyl acrylate (BA), 10 parts of methyl acrylate (MA), 3 parts of acrylic acid (AA), and 0.5 parts of (indenyl) acrylic acid were used in the preparation of the acrylic copolymer, except by weight. 2-Hydroxyethyl ester (2-HEMA), and 7 parts of diphenylacetylene were used in the preparation of the first PSA layer, and the rest were carried out in the same manner as in Example 1. 15 Example 5

除了以重量為準而在製備第一層PSA層時使用6份的 三聯苯(terphenyl)代替7份的二苯乙炔外,其餘均以如同範 例1的程序來進行。 比較範例1 20 除了未採用具有正應力光學係數的化合物外,其餘均 以如同範例1的程序來進行。 比較範例2 除了以重量為準而在製備丙烯酸共聚物時使用95份 丙烯酸正丁酯(BA),和在製備第一層PSA層時未使用具正 -22- 1257944 - 發明說明®Μ 應力光學係數的化合物以及多功能性交聯劑外,其餘均以 如同範例1的程序來進行。 實驗 對於採用範例1到5和比較範例1與2製備之丙烯酸 5 PSA成分所製備的偏光膜,分別以下列方評估耐久性,透 光均勻性,可切割性,和再加工性。下列表1所示者即為 其結果。The procedure as in Example 1 was carried out except that 6 parts of terphenyl was used instead of 7 parts of diphenylacetylene in the preparation of the first PSA layer, based on the weight. Comparative Example 1 20 Except that a compound having a positive stress optical coefficient was not employed, the procedure was carried out as in Example 1. Comparative Example 2 95 parts of n-butyl acrylate (BA) were used in the preparation of the acrylic copolymer, and no -22-1257944 was used in the preparation of the first PSA layer, except for the weight. Except for the compound of the coefficient and the multifunctional crosslinking agent, the rest were carried out in the same manner as in Example 1. Experimental For the polarizing films prepared using the acrylic acid 5 PSA compositions prepared in Examples 1 to 5 and Comparative Examples 1 and 2, durability, transparency, cuttability, and reworkability were evaluated in the following manners, respectively. The result shown in Table 1 below is the result.

a) 耐久性a) durability

使用層合機,以大約5 kg/cm2的壓力把90 mm X 170 10 mm的偏光膜黏附到110 mm X 190 mm x0.7 mm之玻璃的 兩面。各偏光膜的光軸彼此交叉而獲得一個黑暗狀態。這 層合步驟是在無塵室中進行,以防面板有氣泡或受污染。 把測試樣品放進溫度為60 °C和相對濕度(RH)為90%的濕 氣室中擱置1,〇〇〇小時,以便利用濕熱條件來檢查是否形 15 成氣泡和是否邊緣麵曲(edge lifting)。另外,也在溫度為80 °C的烘箱内以如同濕熱測試的相同方法對樣品進行1,000 小時的耐熱測試。此外,執行評估前,先在室溫條件下對 測試樣品進行24小時的調整。評估的耐久性如下·· 〇:未觀察到氣泡或邊緣麵曲情形。 20 △:觀察到少量小氣泡及輕微的緣翹曲。 •X :觀察到大量氣泡及邊緣魏曲。 b) 漏光 在暗室中使用背光系統觀察,據以評估如前所製備之 樣品(交叉偏光狀態)的漏光情形。透光均句性的測量如下: -23- 1257944 - 發明說明H頁 〇:憑肉眼未觀察到漏光情形。 △:觀察到輕微的不均勻透光情形。 X:觀察到偏光膜邊緣有嚴重的漏光情形。 c)可切割 5 以湯姆遜(Thomson)裁切器來裁切包括該PSA的偏光 膜。所切割之偏光膜的剖面經觀察及評估如下: 〇··切割後之黏合拔脫程度小於0.2 mm。A 90 mm X 170 10 mm polarizing film was adhered to both sides of a 110 mm X 190 mm x 0.7 mm glass using a laminator at a pressure of approximately 5 kg/cm2. The optical axes of the respective polarizing films cross each other to obtain a dark state. This lamination step is carried out in a clean room to prevent bubbles or contamination of the panel. Place the test sample in a humid chamber at a temperature of 60 ° C and a relative humidity (RH) of 90% for 1 hour, in order to check whether the shape is 15 bubbles or not. Lifting). In addition, the samples were subjected to a heat resistance test for 1,000 hours in the same manner as the damp heat test in an oven at a temperature of 80 °C. In addition, the test samples were conditioned for 24 hours at room temperature prior to performing the evaluation. The durability of the evaluation was as follows. 〇: No bubble or edge buckling was observed. 20 △: A small amount of small bubbles and slight edge warpage were observed. • X: A large number of bubbles and edges are observed. b) Light leakage Light is observed in a dark room using a backlight system to evaluate the light leakage of the sample (cross-polarized state) prepared as before. The measurement of the uniformity of light transmission is as follows: -23- 1257944 - Description of the invention Page H 〇: No light leakage was observed by the naked eye. △: A slight uneven light transmission was observed. X: A serious light leakage was observed at the edge of the polarizing film. c) Cuttable 5 A Thomson cutter is used to cut the polarizing film including the PSA. The cross section of the cut polarizing film was observed and evaluated as follows: 〇·· The degree of adhesion and detachment after cutting was less than 0.2 mm.

△:切割後之黏合拔脫程度為0.2到0.5 mm。 X :切割後之黏合拔脫程度大於0.5 mm。 10 d)再加工性 將塗布某種數量之PSA的90 mm X 170 mm偏光膜在室 溫(23 °C,60%相對濕度)條件下予以老化處理7日,然後 黏附到一片110 mm X 190 mm X 0.7mm的玻璃基板的各面 上。等這偏光膜在室溫條件下靜置1小時後,以50 °C的 15 溫度加熱4小時,接著再在室溫條件下靜置1小時。另外, 使偏光膜從玻璃基板上剝離。再加工性的評估如下:△: The degree of adhesion and peeling after cutting is 0.2 to 0.5 mm. X: The degree of adhesion after cutting is greater than 0.5 mm. 10 d) Reworkability A 90 mm X 170 mm polarizing film coated with a certain amount of PSA is aged at room temperature (23 ° C, 60% relative humidity) for 7 days and then adhered to a piece of 110 mm X 190 Each side of the glass substrate of mm X 0.7 mm. After the polarizing film was allowed to stand at room temperature for 1 hour, it was heated at a temperature of 15 ° C for 5 hours, and then allowed to stand at room temperature for 1 hour. Further, the polarizing film was peeled off from the glass substrate. The evaluation of reworkability is as follows:

〇:易剝離。 △:有點難剝離。 X :難剝離,例如,玻璃斷裂或基板破裂。 -24- 1257944 - 發明說明$賣Μ 表1〇: Easy to peel off. △: It is a little difficult to peel off. X: Difficult to peel off, for example, glass breakage or substrate cracking. -24- 1257944 - Invention description $卖Μ Table 1

類別 範例1 範例2 範例3 範例4 範例5 比較範例1 比較範例2 耐久性 〇 〇 〇 〇 〇 〇 X 透光均 勻性 〇 △〜〇 〇 〇 〇 X 〇 可切割性 〇 〇 〇 〇 〇 〇 X 再加工性 〇 〇 〇 〇 〇 〇 X 如表1所示,依本發明(範例1到5)所製備的PSA,其 包含有由一種具正應力光學係數之化合物構成的第一層 5 PSA層以及由一種具優良耐久性及再加工性之黏合膜片構 成的第二層PSA層,該等PSA若與比較範例1和2的樹脂 相比,無論耐久性、透光均勻性、可切割性、及再加工性 均較優良。 如前所述,本發明的丙烯酸PSA成分可對黏附到液晶 10 顯示板上之偏光膜因收縮而產生的雙折射予以減低,所以 能在不犧牲諸如PSA性質、耐久性及可切割性之類重要性 質的情況下解決液晶顯示板的漏光問題。 -25-Category Example 1 Example 2 Example 3 Example 4 Example 5 Comparison Example 1 Comparison Example 2 Durability〇〇〇〇〇〇X Transmittance uniformity 〇△~〇〇〇〇X 〇Cutability 〇〇〇〇〇〇X Processability 〇〇〇〇〇〇X As shown in Table 1, the PSA prepared according to the present invention (Examples 1 to 5) comprises a first layer of 5 PSA layer composed of a compound having a positive stress optical coefficient and A second layer of PSA layer composed of an adhesive film having excellent durability and reworkability, which is superior to the resins of Comparative Examples 1 and 2 in durability, light transmittance uniformity, cuttability, And reworkability is better. As described above, the acrylic PSA component of the present invention can reduce the birefringence caused by shrinkage of the polarizing film adhered to the liquid crystal display panel, so that the properties such as PSA, durability, and cuttability can be sacrificed without sacrificing. In the case of important properties, the problem of light leakage of the liquid crystal display panel is solved. -25-

Claims (1)

申請專利範圍續頁 ,或一個聯接萘或蒽之各核心的橋 連鍵(其中R和R2分別或同時是從Ci到C2〇烧基、炫氧基、 與芳基構成之群組中所選用的取代基);以及 a及b是個〇到3的整數(如果a = 〇,b是個1到3的 整數;否則b是個〇到3的整數)。 2·如申請專利範圍第1項所述之丙烯酸PSA成分, 其中以化學式1或化學式2表示的該芳族化合物,係從聯 笨、反式二笨乙烯、偶氮苯、對_三聯苯、間-三聯苯、異丙 苯基苯曱酸鹽、二苯乙炔、4-乙基二苯、4,-苯基-4-二苯基 碳腈、4-二苯基碳腈、4,_苯基二苯、4,_苯氧基二苯基碳 腈、4’-己基-4-二苯基碳腈、4,-辛基-4-二苯基碳腈、反式-4-辛基-4’-乙氧基二苯乙烯、萘、蒽、4,_甲氧基苯亞曱基氨 基二笨乙烯、4,-曱氧基苯亞甲基氨基偶氮苯及其混合物所 構成之群組中所選用者。 3·如申請專利範圍第1項所述之丙烯酸PSA成分, 其中以重量為準,該第一層PSA層的該丙烯酸共聚物包含 有75到99.89份的一種具有到C12烷基群的(甲基)丙烯 酉欠酉旨單體,〇.1到20份的一種α、β不飽和羧酸單體,以及 0·01到5份的一種具有羥基群的功能性單體。 4·如申請專利範圍第1項所述之丙烯酸PSΑ成分, 其中該多功能性交聯劑是從一異氰酸酯交聯劑、一環氧基 人聯劑、一氮丙啶基交聯劑和一金屬螯合交聯劑所構成的 群組中所選出的一種或以上的化合物;其中該異氰酸酯交 聯劑係從二異氰酸甲苯酯,二苯基甲烷二異氰酸酯,六亞 1257944 〆 ~&quot; ^ — , 申請專利範圍續頁 曱基一異氰酸酯以及三甲醇丙烷所構成之族群中所選出 者。 5.如申請專利範圍第i項所述之丙烯酸psA成分, 其中以重S為準’該第_層PSA層更包含有i ^丨⑼份從 5 (氫化)烴樹脂,(氫化)松香樹脂,(氫化)松香酯樹脂,(氫化) 帖烯基树知’(氫化)帖烯紛樹脂,聚合松香樹脂以及聚合松 香醋樹脂所構成之族群中所選出的一種或以上的增黏劑。 6·如申請專利範圍第1項所述之丙烯酸PSA成分, 更包含有從環氧樹脂,硬化劑、紫外線穩定劑、抗氧化劑、 10著色劑、強化劑、及填充劑所構成之群組中所選用的一種 或以上的添加劑。 7·如申請專利範圍第1項所述之丙烯酸PSA成分, 其中以重量為準,該第二層PSA層包含有:1〇〇份的一種 丙烯酸共聚物,該共聚物則包含有75到99.89份的一種具 15有Ci到Cu烷基群的(甲基)丙烯酸酯單體,〇1到2〇份的 一種α、β不飽和羧酸單體,及〇 〇1到5份的一種具有羥基 群的功能性單體;以及〇·〇1到1〇份的一種多功能性異氰 酸酯交聯劑。 8·如申請專利範圍第1項所述之丙烯酸PSA成分, 20 其中該第一層PSA層的厚度為1〇到50 μηι,該第二層PSA 層的厚度則為10到20 μιη。 9·如申凊專利範圍第1項所述之丙婦酸psa成分, 其中該丙稀酸黏合劑成分的交聯劑密度為1到95%。 10· —種包含如申請專利範圍第1項所述之PSA膜的 -28- 1257944 偏光膜。 申請專利範圍續頁Continuation of the scope of the patent application, or a bridging bond connecting the cores of naphthalene or anthracene (wherein R and R2 are selected from the group consisting of Ci to C2, a methoxy group, and an aryl group, respectively) Substituents); and a and b are integers up to 3 (if a = 〇, b is an integer from 1 to 3; otherwise b is an integer from 〇 to 3). 2. The acrylic PSA component according to claim 1, wherein the aromatic compound represented by Chemical Formula 1 or Chemical Formula 2 is from the group of stupid, trans-di-vinyl, azobenzene, p-terphenyl, M-terphenyl, cumene benzoate, diphenylacetylene, 4-ethyldiphenyl, 4,-phenyl-4-diphenylcarbonitrile, 4-diphenylcarbonitrile, 4,_ Phenyldiphenyl, 4,-phenoxydiphenylcarbonitrile, 4'-hexyl-4-diphenylcarbonitrile, 4,-octyl-4-diphenylcarbonitrile, trans-4-xin Composition of 4'-ethoxystilbene, naphthalene, anthracene, 4,-methoxybenzylideneaminodiphenylene, 4,-decyloxybenzylideneaminoazobenzene, and mixtures thereof The selected user in the group. 3. The acrylic PSA component according to claim 1, wherein the acrylic copolymer of the first PSA layer comprises 75 to 99.89 parts of a group having a C12 alkyl group. A propylene oxime monomer, 1. 1 to 20 parts of an α, β unsaturated carboxylic acid monomer, and 0. 01 to 5 parts of a functional monomer having a hydroxyl group. 4. The acrylic PS component according to claim 1, wherein the multifunctional crosslinking agent is a monoisocyanate crosslinking agent, an epoxy group, a azoridyl crosslinking agent and a metal. One or more compounds selected from the group consisting of chelating crosslinkers; wherein the isocyanate crosslinker is derived from toluene diisocyanate, diphenylmethane diisocyanate, and hexa 1257944 〆~&quot; — , The scope of the patent application continues to be selected from the group consisting of sulfhydryl monoisocyanate and trimethylolpropane. 5. The psA component of acrylic acid according to item i of the patent application, wherein the weight of the S layer further comprises i ^ 丨 (9) parts from 5 (hydrogenated) hydrocarbon resin, (hydrogenated) rosin resin (Hydrogenated) rosin ester resin, (hydrogenated) a one or more tackifier selected from the group consisting of a (hydrogenated) olefin resin, a polymerized rosin resin, and a polymerized rosin vinegar resin. 6. The acrylic PSA component according to claim 1 further comprises a group consisting of an epoxy resin, a hardener, a UV stabilizer, an antioxidant, a 10 colorant, a strengthening agent, and a filler. One or more additives selected for use. 7. The acrylic PSA component according to claim 1, wherein the second PSA layer comprises: 1 part of an acrylic copolymer, and the copolymer comprises 75 to 99.89. a (meth) acrylate monomer having 15 Ci to Cu alkyl groups, 1 to 2 parts by weight of an α, β unsaturated carboxylic acid monomer, and 1 to 5 parts of hydrazine A functional monomer of a hydroxyl group; and a multifunctional isocyanate crosslinking agent having from 1 to 1 part by weight. 8. The acrylic PSA component according to claim 1, wherein the first layer of the PSA layer has a thickness of from 1 Å to 50 μm, and the second layer of the PSA layer has a thickness of from 10 to 20 μm. 9. The prostaglandin psa component according to claim 1, wherein the acrylic acid binder component has a crosslinker density of from 1 to 95%. A -28-1257944 polarizing film comprising a PSA film as described in claim 1 of the patent application. Patent application continuation page -29- 1257944 • ν^η§.:Φ^-; ϊ:;^ : 拾、申請專利範圍 ……一—· * ‘」 h —種丙烯酸PSA(感壓黏合劑)成分,其包含有: 一第一層PSA層,其包含有〇 〇〇1到4〇重量份且具有 正應力光學係數的一種化合物、0.01到10重量份的一種 多功能性交聯劑,以及1〇〇重量份的一種丙烯酸妓 · . 5 以及 一第二層PSA層,其包含有一丙烯酸共聚物;-29- 1257944 • ν^η§.:Φ^-; ϊ:;^ : Pick up, apply for patent range...1—· * '” h — an acrylic PSA (pressure-sensitive adhesive) component, which contains: a first PSA layer comprising: 1 to 4 parts by weight of a compound having a positive stress optical coefficient, 0.01 to 10 parts by weight of a multifunctional crosslinking agent, and 1 part by weight of one妓···5 and a second PSA layer comprising an acrylic copolymer; 其中,該具有一正應力光學係數的化合物,係為一種 以下列化學結構式丨或化學結構式2所表示的芳族化合物: 化學結構式1Wherein the compound having a positive stress optical coefficient is an aromatic compound represented by the following chemical structural formula or chemical structural formula 2: Chemical structural formula 1 X,Y,心,和R2分別或同時是從氫、氰、氯、溴、羥 15基、二甲胺、異丙苯基(cumyl)、和^到Cm的烷基、烷氧 基、與芳基構成之群組中所選用的取代基; A 是-CH=N-,-N=N、-n=N(0)-,-COO-,_CH2〇、, -cd^-co、-c〇〇-Ch2-,«.各,_s〇2_, -CH^N^CR^-N^CH-, -C=C-〇(r1).n=c.5 -C=C-®(R1)-C-C^ 20 'C = C'&lt;I)(Rl)-i)(R2)-c = C^.c = N-0(Rl)-®(R2)-N = C^ Ld續次頁(申請專利範顚不敷醜時’請註記並使用顚) , -26-X, Y, heart, and R2 are respectively alkyl or alkoxy groups from hydrogen, cyanide, chlorine, bromine, hydroxy 15 group, dimethylamine, cumyl, and C to Cm. Substituents selected for the group consisting of aryl groups; A is -CH=N-, -N=N, -n=N(0)-, -COO-, _CH2〇,, -cd^-co, - c〇〇-Ch2-,«.each,_s〇2_, -CH^N^CR^-N^CH-, -C=C-〇(r1).n=c.5 -C=C-®( R1)-CC^ 20 'C = C'&lt;I)(Rl)-i)(R2)-c = C^.c = N-0(Rl)-®(R2)-N = C^ Ld continued The second page (please note and use 顚 when applying for a patent 顚 顚 顚), -26-
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