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Adhesive composition and optical film using the same

A technology of optical film and adhesive layer, which is applied in the field of optical film, can solve the problems of process corrosion, insufficient bonding, and inability to guarantee the bonding strength, etc., and achieve the effect of excellent bonding performance and excellent durability

Active Publication Date: 2013-11-13
杉金光电(广州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even if the surface of an acrylic film is subjected to corona treatment or plasma treatment, because the number of introduced hydrophilic groups is small, hydrogen bonding with PVA-based adhesives is insufficient, making it impossible to secure the acrylic Sufficient adhesive strength between ester film and polarizer of PVA composition
[0006] In order to adhere the acrylate film and the polarizer, acrylate-based UV curable adhesives can be used, but the following problems have been confirmed: (1) In the conventional polarizing plate manufacturing process, since a water-soluble adhesive is used, In the case of UV curable adhesives, a separate UV curing procedure is required, and because of the use of volatile flammable monomers, additional explosion-proof devices are required; (2) Known PVA can be converted into a solid by controlling the solid content and process management. The thickness of water-soluble adhesives is made within 100nm, but it is difficult to control the thickness of acrylate-based UV-curable adhesives within 1nm or less, so that polarization occurs as the brittleness of the adhesive layer increases The problem of plate breakage; and (3) the adhesion with the acrylic film can be easily achieved, but it is not easy to ensure the adhesion strength with the polarizer
A large amount of acidic reactive groups can be included in order to ensure the bonding strength with the polarizer, but this is not preferred in view of the process corrosion caused by the acid and the operating environment

Method used

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  • Adhesive composition and optical film using the same
  • Adhesive composition and optical film using the same
  • Adhesive composition and optical film using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A 6 wt% aqueous solution was prepared by diluting Kymene-557H (compound containing an azetidinium group and an amine group) (Hercules Korea, 12.5 wt% aqueous solution) with pure water, and using this solution, the corona-treated Acrylic films were adhered to both sides of the polarizer. For the acrylate-based film, T-film produced by OPTES, Co., Ltd. and having a thickness of 80 μm was used. Make the surface of the membrane at 50W / m 2 / min under the condition of corona treatment. The adhesive was injected between the polarizing plate and the acrylate-based films on both sides thereof, rolled with a pressure roller, and dried using hot air at a temperature of 80° C. for 5 minutes, thereby preparing a polarizing plate.

Embodiment 2

[0063] After adding NaOH aqueous solution to make the pH of Kymene-557H (Hercules Korea, 12.5 wt% aqueous solution, pH = 5) to be 7, using a 6 wt% adhesive composition prepared by diluting it with pure water, the corona Treated acrylate-based films were adhered to both sides of the polarizer.

Embodiment 3

[0065] Using the adhesive composition of Example 2, a corona-treated acrylate-based film was adhered to one side of a polarizer and an alkali-treated TAC film was adhered to the other side of the polarizer superior.

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Abstract

The present invention relates to an adhesive composition containing a compound having an azetidinium functional group, and an optical film and a polarizer both containing an adhesive layer formed using the adhesive composition.

Description

technical field [0001] The invention provides an adhesive composition and an optical film using the adhesive composition. More specifically, the present invention provides an adhesive composition which has excellent adhesive properties and can be used for optical films requiring transparency and an optical film using the adhesive composition. film. [0002] This application claims priority from Korean Patent Application No. 10-2008-0032563 filed with the Korean Intellectual Property Office on Apr. 8, 2008, the entire disclosure of which is incorporated herein by reference. Background technique [0003] Generally, a polarizing plate has a structure in which triacetyl cellulose ( Hereinafter, referred to as TAC) membrane ( figure 1 ). If the polarizing plate having the above structure is used without a separate compensation film, the viewing angle may be deteriorated. Therefore, instead of one of the two TAC films, a zero-retardation TAC (hereinafter, referred to as Z-TAC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J179/00
CPCG02B5/305C09J179/02C09J177/06C08G73/1064C08G73/028C09J179/00
Inventor 金范锡徐银美赵东满尹锡逸
Owner 杉金光电(广州)有限公司
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