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Adhesive layer and adhesive film

An adhesive layer and adhesive technology, applied in the directions of adhesives, adhesive types, ester copolymer adhesives, etc., can solve the problems of reduced visibility, noise effects, etc. Effects of workability, durability and reworkability

Active Publication Date: 2016-06-15
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that external light, etc. is reflected on the upper surface of the liquid crystal panel or the lower surface of the touch panel, reducing visibility, especially in bright environments such as outdoors.
[0005] However, the capacitive touch panel is a sensor that detects changes in the electromagnetic field, so it is easily affected by noise

Method used

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  • Adhesive layer and adhesive film
  • Adhesive layer and adhesive film
  • Adhesive layer and adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Nitrogen gas was introduced into a reaction device equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen introduction pipe, and the air in the reaction device was replaced with nitrogen gas. Thereafter, 100 parts by weight of butyl acrylate and 0.2 parts by weight of 8-hydroxyoctyl acrylate were added to the reaction device, and 60 parts by weight of a solvent (ethyl acetate) were added simultaneously. Thereafter, 0.1 part by weight of azobisisobutyronitrile was added dropwise as a polymerization initiator over 2 hours, and reacted at 65° C. for 6 hours to obtain acrylic polymer solution 1 used in Example 1. A part of the acrylic polymer was collected and used as a measurement sample for the acid value described later.

Embodiment 2～4 and comparative example 1～3

[0082] The composition of the monomers was as described in the (1) group and (2) group of Table 1, respectively, except that, it was carried out in the same manner as the acrylic polymer solution 1 used in the above-mentioned Example 1, and Examples 2-4 were obtained. and the acrylic polymer solutions used in Comparative Examples 1-3.

[0083]

[0084] [Example 1]

[0085] To the acrylic polymer solution 1 of Example 1 produced as described above, 0.2 parts by weight of Coronate L (a 75% ethyl acetate solution of a trimethylolpropane (TMP) adduct of a toluene diisocyanate (TDI) compound) was added, 0.05 parts by weight of KBM-403 (3-glycidoxypropyltrimethoxysilane) was stirred and mixed to obtain the adhesive composition of Example 1. After coating this adhesive composition on a release film (a polyterephthalic acid (PET) film coated with a silicone resin), drying at 90° C. to remove the solvent, and drying at 23° C. Aging was carried out for 7 days in an atmosphere of 50%...

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Abstract

The present invention provides an adhesive layer having excellent reworkability and high adhesion in spite of a thin film, and an adhesive film using the same. An acrylic polymer comprises a copolymer which is copolymerized by at least one monomer of an alkyl(meth)acrylate monomer with an alkyl group having 1 to 14 carbon atoms (meth)acrylate monomer, an alicyclic-containing monomer, a monomer group composed of branched structure of alkyl with copolymerized vinyl monomers containing hydroxy; the total part by weight of the monomer other than the hydroxyl group-containing copolymerized vinyl monomer is 100,wherein there is 30-100 parts by weight of (meth) butyl acrylate, and 0.1-3.5 parts by weight of gydroxy-containing copolymerized vinyl monomer. The gel fraction is 40%-75%, the thickness is 1000[mu]m, the specific dielectric constant is 1.50-5.50 under the frequency of 100kHz, and the dielectric loss is 0.01-0.09.

Description

technical field [0001] The present invention relates to an adhesive layer and an adhesive film, which are used for bonding optical components such as polarizers. In more detail, the present invention provides an adhesive layer and an adhesive film, wherein it is used for optical The bonding of parts, the dielectric constant and dielectric loss of the adhesive layer are low, and it has both softness and stiffness, durability and reworkability. Background technique [0002] In recent years, various display devices in which a capacitive touch panel is externally connected to a liquid crystal panel, such as smart phones, tablet terminals, and tablet PCs, have been widely used. In such a display device, there is a physical space between the liquid crystal panel and the touch panel. Therefore, there is a problem that external light or the like is reflected on the upper surface of the liquid crystal panel or the lower surface of the touch panel, thereby reducing visibility, espec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/06C09J7/02
CPCC09J4/06C09J133/06C09J2203/318C09J7/385G02B5/30
Inventor 长仓毅吉田弘幸长谷川良菱沼昌世
Owner FUJIMORI KOGYO CO LTD
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