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Adhesive composition, adhesive layer, adhesive sheet and optical thin film

An adhesive layer and composition technology, applied in the direction of adhesive types, ester copolymer adhesives, graft polymer adhesives, etc., can solve the lack of adhesive force and poor bonding reliability of adhesive sheets And other issues

Inactive Publication Date: 2014-02-12
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Existing adhesive sheets lack time-dependent adhesive force and poor bonding reliability, so they cannot meet the requirements

Method used

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  • Adhesive composition, adhesive layer, adhesive sheet and optical thin film
  • Adhesive composition, adhesive layer, adhesive sheet and optical thin film
  • Adhesive composition, adhesive layer, adhesive sheet and optical thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0274] (Preparation of Acrylic Adhesive Composition)

[0275] After adding 5 parts by mass of the above-mentioned (meth)acrylic polymer 1 and 0.1 part by mass of trimethylolpropane triacrylate (TMPTA) to 100 parts by mass of the above-mentioned acrylic polymer slurry, they were uniformly mixed to prepare an acrylic acid Adhesive composition.

[0276] (Preparation of acrylic adhesive layer)

[0277] On the release-treated surface of a 38-μm-thick polyester film (trade name: Diafoil MRF, manufactured by Mitsubishi Plastics Corporation) that has been released with silicone on one side, apply the above-mentioned acrylic adhesive to a final thickness of 50 μm. agent composition, forming a coating layer. Then, on the surface of the applied acrylic pressure-sensitive adhesive composition, a 38 μm thick polyester film ( Brand name: Diafoil MRF, manufactured by Mitsubishi Plastics Corporation). Thereby, the coating layer (acrylic pressure-sensitive adhesive composition layer) of th...

Embodiment 2

[0279] Except using 10 parts by mass of (meth)acrylic polymer 1 instead of 5 parts by mass of (meth)acrylic polymer 1, an acrylic adhesive composition was prepared in the same manner as in Example 1. The same method was used to obtain an acrylic adhesive layer.

Embodiment 3

[0281] Except using 5 parts by mass of (meth)acrylic polymer 2 instead of 5 parts by mass of (meth)acrylic polymer 1, an acrylic adhesive composition was prepared in the same manner as in Example 1. The same method was used to obtain an acrylic adhesive layer.

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Abstract

A pressure-sensitive adhesive composition includes: 100 parts by mass of a polymer (A) having a glass transition temperature lower than 0° C.; and 0.05 parts by mass to 20 parts by mass of a (meth)acrylic polymer (B) having a weight average molecular weight (MwB) of 1000@MwB<30000 that contains, as monomer units, both a (meth)acrylic monomer having an alicyclic structure represented by the following general formula (1) and a monomer having a polyoxyalkylene skeleton: CH2=C(R1)COOR2(1) [wherein R1 represents a hydrogen atom or a methyl group and R2 represents an alicyclic hydrocarbon group having an alicyclic structure.]

Description

technical field [0001] The present invention relates to a pressure-sensitive adhesive composition, a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition, and a pressure-sensitive adhesive sheet. Background technique [0002] The pressure-sensitive adhesive sheet is used for the purpose of bonding adherends to each other or fixing an article to an adherend by firmly adhering to the adherend. In this case, if the adhesive force is high from the initial stage of bonding, it will be difficult to reattach. Therefore, an adhesive tape whose initial adhesive force is weak but whose adhesive force increases over time to obtain high adhesive force is being sought. . [0003] In particular, in recent years, liquid crystal displays, plasma displays, organic EL displays, and the like have become popular. These displays must be equipped with various optical films on both sides of the glass substrate forming the outermost surface. For example, a po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J151/08C09J7/02G02B1/10B32B27/00B32B27/30C09J133/00C09J133/04C09J133/16C09J133/26C09J201/00G02B5/30G02F1/1335
CPCC09J7/0217C09J2203/318C09J133/08C08L2205/02C09J4/06C08L33/14C09J7/385Y10T428/2891C09J2301/312C08F220/286C08F220/1808C08F265/06C08F220/1806C08F226/10C08F220/1811C09J7/22C09J133/04G02B5/00G02B5/005C09J2203/00C09J2301/302
Inventor 重富清惠菅野亮冈本昌之山形真人
Owner NITTO DENKO CORP
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