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Adhesive composition, optical member, surface protective film, and adhesive sheet

A surface protection film, optical element technology, applied in the direction of optical elements, non-polymer adhesive additives, adhesive types, etc.

Active Publication Date: 2012-05-23
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although this adhesive composition can reduce the aging time compared to conventional adhesive compositions, it still requires at least 0.5 days of aging time

Method used

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  • Adhesive composition, optical member, surface protective film, and adhesive sheet
  • Adhesive composition, optical member, surface protective film, and adhesive sheet
  • Adhesive composition, optical member, surface protective film, and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0157] The present invention will be illustrated with reference to the following Examples and Comparative Examples. However, it is to be understood that the present invention is not limited to the illustrated embodiments and may be implemented in various ways.

[0158] In the following examples, the solid content and viscosity of the polymer solution, the viscosity of the adhesive composition, and the weight average molecular weight of the polymer (A) were determined by the following methods.

[0159]

[0160] Accurately weigh approximately 1 g of polymer solution on a precisely weighed glass plate. The solution was dried at 105° C. for 1 hour and cooled to room temperature, after which the total weight of the glass plate and residual solids content was accurately weighed. The weight of the glass plate was defined as X, the total weight of the glass plate and polymer solution before drying was defined as Y, and the total weight of the glass plate and the remaining solid con...

preparation example 1

[0170] Put 99 parts by weight of n-butyl acrylate (Nihon Shokubai Co., Ltd.), 1 part by weight of 2-hydroxyethyl acrylate (Nihon Shokubai Co., Ltd.) and 120 parts by weight of ethyl acetate into a reflux condenser and stir in a flask and heated to 65 °C under a nitrogen atmosphere. 0.04 parts by weight of azobisisobutyronitrile (AIBN) was added, followed by polymerization for 6 hours while maintaining the mixture at 65°C. After the polymerization was completed, the mixture was diluted with 280 parts by weight of ethyl acetate to obtain a solution of polymer (A-1). The solution of polymer (A-1) had a solid content of 20% and a viscosity of 4500 mPa·s. In addition, polymer (A-1) had a weight average molecular weight of 1,600,000 g / mol.

preparation example 2 to 19

[0172] Solutions of polymers (A-2) to (A-19) were prepared in the same manner as in Preparation Example 1, except that the respective monomers were mixed according to the composition listed in Table 1. Subsequently, the solid content and viscosity of the solutions of the polymers (A-2) to (A-19), and the weight average molecular weights of the polymers (A-2) to (A-19) were measured, and the results are shown in Table 2. In Table 2, "BA", "MA", "HEA", "4HBA", "HEAA" and "AA" refer to butyl acrylate, methyl acrylate, 2-hydroxyethyl acrylate, 4- -Hydroxybutyl ester, N-2-hydroxyethylacrylamide and acrylic acid.

[0173] Table 2

[0174]

[0175] *M: Mega

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Abstract

The present invention provides an adhesive composition, an optical member, a surface protective film, and an adhesive sheet, wherein the adhesive composition includes 100 parts by weight of a (meth)acrylic copolymer having a weight average molecular weight of about 100,000 to about 2,000,000 g / mol; about 0.01 to about 5 parts by weight of a peroxide crosslinking agent; and about 0.001 to about 5 parts by weight of a carbodiimide.

Description

technical field [0001] The present invention relates to adhesive compositions. More specifically, the present invention relates to adhesive compositions having a long pot life for excellent processability and exhibiting practical adhesive properties within a short aging time after adhesive treatment. performance. Background technique [0002] Recently, the use of flat panel displays (FPDs) such as liquid crystal displays (LCDs), plasma display panels (PDPs) and organic electroluminescent (EL) displays has been increasing. Therefore, there is a need to improve the processability and productivity of adhesives for FPDs. [0003] JP2005-307034 discloses an adhesive composition for optical elements, including acrylic polymer, peroxide and silane coupling agent. The adhesive composition exhibits excellent durability under high temperature and high humidity conditions without aging after deposition, drying and crosslinking. However, although this adhesive composition can reduce...

Claims

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Application Information

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IPC IPC(8): C09J133/00C09J133/08C09J11/06C09J7/00G02B5/30G02B1/04
CPCC08K5/5442C09J7/0217C08K5/14C08K5/29C09J2205/102C08K5/0025C09J7/385C09J2301/408C08K5/5477
Inventor 小川博史诹访达弘
Owner CHEIL IND INC
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