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

A technology of pressure-sensitive adhesive sheet and pressure-sensitive adhesive layer, which is applied in the field of pressure-sensitive adhesive composition, pressure-sensitive adhesive and pressure-sensitive adhesive sheet, can solve problems such as contamination of liquid crystal cells, and achieve durability Excellent light leakage and durability, excellent cohesive effect

Active Publication Date: 2016-03-23
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

[0130] 1. Preparation of Polymer (A)

[0131] Add 95.0 parts by mass of n-butyl acrylate, 5.0 parts by mass of acrylic acid, 200 parts by mass of ethyl acetate, and 2,2'-azo 0.08 parts by mass of diisobutyronitrile, 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 polymer (A) having a weight average molecular weight of 1.5 million was produced.

[0132] 2. Preparation of Polymer (B)

[0133] 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, 2,2 0.16 parts by mass of '-azobisisobutyronitrile and 0.3 parts by mass of 2-mercaptoethanol were used to replace the air in the reaction co...

Embodiment 2～32

[0155] [Examples 2-32, Comparative Examples 1-7]

[0156] The types and proportions 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 polymer (A) and the polymer (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

The present invention provides a pressure-sensitive adhesive composition excellent in light leakage resistance and durability when used in optical parts, a production method thereof, a pressure-sensitive adhesive, and a pressure-sensitive adhesive sheet. The composition contains 100 parts by mass of the first (meth)acrylate polymer (A) with a weight average molecular weight of 700,000 to 2.5 million, and 5 to 40 parts by mass of the second (meth)acrylic acid with a weight average molecular weight of 8,000 to 250,000. An ester polymer (B) and a crosslinking agent (C), the polymer (B) comprising 1 to 50% by mass of a monomer having a functional group (b1) reactive with the crosslinking agent (C) as a constituent, the polymer (B) The functional group reactive with the crosslinking agent (C) is substantially only the functional group (b1), and the polymer (A) does not contain a monomer having a functional group reactive with the crosslinking agent (C) as a constituent or contains A monomer having a functional group (a1) is used as a constituent, and the functional group (a1) has lower reactivity with the crosslinking agent (C) than the functional group (b1).

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive composition, a method for producing the pressure-sensitive adhesive composition, a pressure-sensitive adhesive (material obtained by crosslinking the pressure-sensitive adhesive composition), and a pressure-sensitive adhesive sheet, In particular, it relates to a pressure-sensitive adhesive composition preferably used as an optical member such as a polarizing plate, a method for producing the pressure-sensitive adhesive composition, a pressure-sensitive adhesive, and a 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 th...

Claims

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Application Information

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