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Adhesive composition for optical film and surface protection film

A surface protection film and composition technology, applied in the direction of film/sheet adhesive, adhesive, polyether adhesive, etc., can solve the problem of high acid value of adhesive, difficult to use for ITO film, etc., to achieve pollution Low corrosion and corrosion resistance, excellent antistatic properties and transparency

Active Publication Date: 2016-10-12
RESONAC CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since this adhesive has a high acid value, it is difficult to apply it to optical parts such as ITO films that cannot be corroded.

Method used

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  • Adhesive composition for optical film and surface protection film
  • Adhesive composition for optical film and surface protection film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～2 and comparative example 1～7

[0083] Add (meth)acrylic resin, polyoxyalkylene polyol, polyisocyanate, ionic compound and tin catalyst with the composition shown in Table 2, and further adjust the concentration of solid phase components to 50% by mass with ethyl acetate , by mixing with a disperser at room temperature, an adhesive composition solution for optical films was obtained. On the release-treated surface of a separator formed by performing a release treatment on one side of polyethylene terephthalate (PET) with a thickness of 38 μm, the solution was cast to a thickness of 50 μm after drying, It heat-dried at 50 degreeC for 5 minutes and 110 degreeC for 3 minutes, and laminated|bonded the PET film of thickness 50 micrometers further, and set it as the adhesive sheet.

[0084]

[0085] The acid value of each composition was determined by the method described above. The results are shown in Table 2.

[0086]

[0087] After the obtained adhesive sheet was cut into a size of 40mm×40mm, they were p...

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PUM

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Abstract

The adhesive composition for optical films of the present invention contains 65 to 85 mass % of (A) a (meth)acrylic resin having a weight average molecular weight of 100,000 to 600,000, and 10 to 30 mass % of (B) a number average molecular weight 500-1500 polyoxyalkylene polyol, 1.0-5.0 mass % (C) polyisocyanate, 0.2-1.0 mass % (D) ionic compound and 0.005-0.1 mass % (E) tin catalyst. The adhesive composition for optical films of the present invention has the advantages of excellent antistatic properties and transparency, and low contamination and corrosion to an adherend.

Description

technical field [0001] The invention relates to an adhesive composition for an optical film and a surface protection film. Background technique [0002] In recent years, in the fields of optical components and electronic components, for the purpose of surface protection, surface protection films in which transparent protective films (transparent substrates) such as polyethylene, polyester, and polypropylene are laminated and adhesives are widely used. This surface protective film has a problem that when the release film is peeled off from the adhesive sheet and the adhesive sheet is peeled off from the adherend, if static electricity is charged, surrounding dirt is attracted to contaminate optical components and electronic components. [0003] Therefore, adhesives imparting antistatic properties have been developed. For example, Patent Documents 1 and 2 disclose adhesives in which polyether polyol is added to an acrylic copolymer as an antistatic agent. However, adhesives i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/00C09J7/02C09J11/04C09J171/02C09J7/22C09J7/30
CPCC08K5/0025C09J2433/00C09J2471/00C08K5/29C08K5/57C08G18/6229C08G18/24C08G18/4063C08G18/48C09J175/04C09J7/22C09J7/30C08K5/32C09J133/08C08L71/02C09J2301/408C08F220/1808C08F220/1811C08F220/14C08F220/20
Inventor 中西健一佐佐木一博竹内雄太
Owner RESONAC CORPORATION