Adhesive composition for optical members, adhesive film for optical members, and surface-protective adhesive film

A technology of optical components and adhesives, applied in optical components, optics, adhesives, etc., can solve the problems of easy precipitation of antioxidants, adverse effects, and inability to use

Active Publication Date: 2014-10-01
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional antioxidants, such as lactone antioxidants, cannot be used from an environmental point of view, and measures have been required to deal with them
For example, common antioxidants as described in Patent Document 1 usually have adverse effects on the human body, so they are dangerous substances whose use is regulated by laws and regulations.
In addition, traditional antioxidants are powdery at room temperature and are easily precipitated even if dissolved in a solvent
If the result of pursuing the antioxidant function is to inevitably increase the amount of its addition, there will be disadvantages such as precipitation of antioxidants from the adhesive layer.

Method used

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  • Adhesive composition for optical members, adhesive film for optical members, and surface-protective adhesive film
  • Adhesive composition for optical members, adhesive film for optical members, and surface-protective adhesive film
  • Adhesive composition for optical members, adhesive film for optical members, and surface-protective adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Nitrogen gas was introduced into a reaction apparatus equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen introduction pipe, thereby replacing the air in the reaction apparatus with nitrogen. Then, 100 parts by weight of 2-ethylhexyl acrylate and 2.0 parts by weight of 6-hydroxyhexyl acrylate were added to the reaction device, and 100 parts by weight of a solvent (ethyl acetate) were simultaneously added. Then, 0.1 parts by weight of azobisisobutyronitrile as a polymerization initiator was dropped over 2 hours and reacted at 65°C for 8 hours to obtain acrylic acid used in Example 1 with a weight average molecular weight of 500,000. Quasi-copolymer solution 1.

Embodiment 2～7 and comparative example 1～2

[0083] Except that the composition of each monomer was adjusted as described in (A), (A′) and (B) in Table 1, it was carried out in the same manner as the above-mentioned acrylic copolymer solution 1 used in Example 1, Acrylic copolymer solutions used in Examples 2-7 and Comparative Examples 1-2 were obtained.

[0084]

[0085] [Example 1]

[0086] In the acrylic copolymer solution 1 (the acrylic copolymer is 100 parts by weight) prepared as above, 2.0 parts by weight of Coronate (coronet) HL (addition of hexamethylene diisocyanate (HDI) compound material) and stirred and mixed to obtain the adhesive composition for optical components of Example 1. This adhesive composition for optical parts was applied on a release film made of a silicone resin-coated polyethylene terephthalate (PET) film, and then dried at 90° C. to remove the solvent, An adhesive film having an adhesive layer thickness of 25 μm was obtained.

[0087] Then, prepare a polyethylene terephthalate (PET) fil...

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Abstract

The invention provides an adhesive composition for optical members, an adhesive film for optical members, and a surface-protective adhesive film, which can prevent the oxidation and color change of an adhesive for optical members, can control the cost even if the additive amount is large, and are good in precipitation resistance. Meanwhile, the surface resistivity of an adhesive layer is reduced, thereby enabling a surface-protective film to be easily peeled off. The adhesive composition contains an acrylic copolymer, a cross-linking agent, and an antioxidant, which all take (methyl) acrylic alkyl ester as the main component. Moreover, the antioxidant contains phenolic compounds, and ionic compounds.

Description

technical field [0001] The present invention relates to an adhesive composition containing a tocopherol antioxidant as an antioxidant added to express the antioxidant function of the adhesive composition, and an adhesive film. More specifically, it relates to an adhesive composition containing a tocopherol compound as an antioxidant component. It relates to providing an adhesive composition which not only does not have environmental instability factors like conventional lactone antioxidants but also has excellent resistance to precipitation due to being an oil-soluble liquid, and adhesives using the adhesive composition. conjunctiva. Background technique [0002] Adhesives used as adhesive films are produced in most cases by free-radical polymerization. If free radicals and polymerization initiators remain in the polymerized adhesive, not only will there be problems with the storage stability of the adhesive before filming, but also problems will occur in the adhesive laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00C09J7/02C09J11/06
CPCC09J7/20C09J11/00C09J133/04C09J175/04G02B5/00
Inventor 长仓毅岛口龙介长谷川良
Owner FUJIMORI KOGYO CO LTD
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