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Pressure-sensitive adhesive composition, pressure-sensitive adhesive and pressure-sensitive adhesive sheet

A pressure-sensitive adhesive and pressure-sensitive adhesive layer technology, applied in the fields of pressure-sensitive adhesive compositions, pressure-sensitive adhesives and pressure-sensitive adhesive sheets, can solve problems such as contamination of liquid crystal cells, and achieve resistance to Excellent light leakage and durability, excellent cohesion effect

Active Publication Date: 2015-09-02
LINTEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, various problems such as contamination of the liquid crystal cell to be adhered will arise accordingly.

Method used

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  • Pressure-sensitive adhesive composition, pressure-sensitive adhesive and pressure-sensitive adhesive sheet
  • Pressure-sensitive adhesive composition, pressure-sensitive adhesive and pressure-sensitive adhesive sheet
  • Pressure-sensitive adhesive composition, pressure-sensitive adhesive and pressure-sensitive adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] 1. Preparation of copolymer (A)

[0110] Add 97.0 parts by mass of n-butyl acrylate, 3.0 parts by mass of acrylic acid, 200 parts by mass of ethyl acetate and 2,2'-azobis 0.08 parts by mass of isobutyronitrile, and the air in the reaction container was replaced with nitrogen. While stirring under this nitrogen atmosphere, the temperature of the reaction solution was raised to 60° C., and after reacting for 16 hours, it was cooled to room temperature. Here, GPC measurement was performed on a part of the obtained solution by the method described later, and it was confirmed that a copolymer (A) having a weight average molecular weight of 1.5 million was produced.

[0111] 2. Preparation of copolymer (B)

[0112] Add 85.0 parts by mass of n-butyl acrylate, 15.0 parts by mass of 2-hydroxyethyl acrylate, 200 parts by mass of ethyl acetate, 2-mercapto 0.3 parts by mass of ethanol and 0.16 parts by mass of 2,2'-azobisisobutyronitrile were used to replace the air in the react...

Embodiment 2～26

[0121] [Examples 2-26, Comparative Examples 1-7]

[0122] The types and ratios of the monomers constituting the pressure-sensitive adhesive composition, the types and amounts of the crosslinking agent and the silane coupling agent, and the compounding ratio of the copolymer (A) and the copolymer (B) are shown in Table 1. Except having changed as shown, it carried out similarly to Example 1, and produced the polarizing plate with a pressure-sensitive adhesive layer.

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Abstract

PROBLEM TO BE SOLVED: To provide an adhesive composition excellent in both light leakage resistance and durability when applied to an optical member of a polarizing plate etc., a method for manufacturing the adhesive composition, an adhesive, and an adhesive sheet. SOLUTION: The adhesive composition 11 includes 100 pts.mass of a first (meth)acrylic acid ester copolymer (A) containing a carboxyl group whose mass average molecular weight is 1,000,000-2,500,000, 10-30 pts.mass of a second (meth)acrylic acid ester copolymer (B) containing a hydroxy group whose mass average molecular weight is 20,000-150,000, an isocyanate-based crosslinking agent (C) containing 0.3-0.9 equivalents of a crosslinkable group based on the amount of the hydroxy group of the second (meth)acrylic acid ester copolymer (B), and a silane coupling agent (D). COPYRIGHT: (C)2012,JPO&INPIT

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive composition, a pressure-sensitive adhesive (a material obtained by cross-linking a pressure-sensitive adhesive composition), and a pressure-sensitive adhesive sheet, and particularly relates to one preferably used as an optical member such as a polarizer Pressure-sensitive adhesive composition, pressure-sensitive adhesive, and pressure-sensitive adhesive sheet. Background technique [0002] Generally, in a liquid crystal panel, a pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition is often used to bond a polarizing plate or a phase difference film to a glass substrate or the like. However, since optical components such as polarizers and retardation films are easily shrunk by heat, etc., it has been pointed out that there is a problem that shrinkage occurs due to heat history, and as a result, the pressure-sensitive adhesive layer laminated on the optical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/04C09J11/06C09J175/04C09J7/02
CPCC09J7/22C09J7/385C09J7/403C09J133/04C09J175/06C09J2203/318C09J2301/302C09J2301/408
Inventor 又野仁荒井隆行所司悟
Owner LINTEC CORP
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