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Adhesive composition, and surface protection film using it

A technology of surface protective film and composition, applied in the field of adhesive composition and surface protective film, can solve the problems of uncomfortable surface protective film, reduce the pollution resistance or transparency of the adherend, and achieve the effect of excellent pollution resistance

Active Publication Date: 2012-12-12
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, as disclosed in Japanese Patent No. 4067173, the adhesive layer of Japanese Patent No. 4067173 is not suitable because the adhesive layer formed from the adhesive composition has reduced stain resistance or transparency of the adherend. Used as a surface protection film on polarizers for flat panel displays

Method used

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  • Adhesive composition, and surface protection film using it
  • Adhesive composition, and surface protection film using it
  • Adhesive composition, and surface protection film using it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0079] The effects of the present invention will be described 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.

[0080] The solid content and viscosity of the solution in which the adhesive composition was dissolved and the weight average molecular weight of the acrylic polymer (A) were measured by the following methods.

[0081]

[0082] Measure 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 and residual solids content of the glass plate were accurately measured. The mass of the glass plate is defined as X, the total weight of the glass plate and the polymer solution before drying is defined as Y, the total weight of the glass plate and the remaining solid content is defined as Z, a...

preparation example 1

[0092] 40 parts by weight of n-butyl acrylate (Nihon Shokubai, Co., Ltd.), 59 parts by weight of 2-ethylhexyl acrylate, 1 part by weight of 2-hydroxyethyl acrylate and 150 parts by weight of acetic acid The ethyl ester was placed in a flask fitted with a reflux condenser and a stirrer, and heated to 65°C under a nitrogen atmosphere. 0.1 part by weight of azobisisobutyronitrile (AIBN) was added, and 0.05 part by weight of AIBN was further added after 1 hour, followed by polymerization for 6 hours, and the mixture was kept at 65°C. After the polymerization was completed, 36 parts by weight of ethyl acetate was added, and the product was cooled to room temperature, thereby obtaining a solution of the copolymer (A-1). The solution of the copolymer (A-1) had a solid content of 35% and a viscosity of 3,500 mPa·s. In addition, the copolymer (A-1) had a weight average molecular weight of 800,000 g / mol. Measure the solid content, viscosity and weight-average molecular weight of copol...

preparation example 2 to 19

[0094] Solutions of polymers (A-2) to (A-19) were prepared by the same method as Preparation Example 1, except that each monomer was mixed according to the composition listed in Table 2. Subsequently, the solid content, viscosity and weight average molecular weight of the solutions of polymers (A-2) to (A-19) were measured, and the results are shown in Table 2. In Table 2, "BA", "2EHA", "HEA", "4HBA", "HEAA", "AM" and "AA" refer to butyl acrylate, 2-ethylhexyl acrylate, 2- Hydroxyethyl ester, 4-hydroxybutyl acrylate, hydroxyethyl acrylamide, acrylamide and acrylic acid.

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Abstract

The invention provides an adhesive composition controlling the pollution of an adherend and making an adhesive have an excellent transparency. The adhesive composition comprises 100 parts by weight of a (methyl) acrylate copolymer and 0.1-5 parts by weight of a carbodiimide crosslinking agent, wherein the (methyl) acrylate copolymer comprises 0-0.5 parts by weight of a carboxyl-containing monomer, 0.6-9 parts by weight of a hydroxy-containing (methyl)acrylic monomer, and 90.5-99.4 parts by weight of a (methyl) acrylate monomer, and has a weight average molecular weight of 100,000-1,000,000g / mol.

Description

technical field [0001] The present invention relates to an adhesive composition and a surface protection film using the adhesive composition. More specifically, the present invention relates to an adhesive composition for forming an adhesive layer having excellent stain resistance and transparency of an adherend, and a surface protection film having excellent stain resistance and transparency of an adherend. Background technique [0002] Generally, various optical films such as polarizing plates, phase difference plates, and antireflection films are deposited on flat panel displays such as liquid crystal displays (LCDs) and plasma display screens (PDPs) using adhesive layers. In addition, a release film or surface protection film is adhered to the optical film to prevent scratches or contamination during preparation and transportation. [0003] For example, a surface protection film is adhered to a polarizing plate through an adhesive layer to protect the polarizing plate a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J7/02
Inventor 小川博史诹访达弘宋政训
Owner CHEIL IND INC
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