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Adhesive composition and adhesive film

A bonding film and composition technology, applied in the direction of adhesives, non-polymer organic compound adhesives, adhesive types, etc., can solve the problems of insufficient adhesion between the adherend and the adhesive layer, and achieve excellent Effect of reworkability and high adhesiveness

Active Publication Date: 2020-02-11
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, for the adhesive film in the form of NCF, since the aging treatment of the adhesive layer has been completed, the adhesion between the adherend and the adhesive layer is insufficient.
Based on this, there is a problem that it is necessary to perform surface treatment such as corona treatment on the surface of the adherend

Method used

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  • Adhesive composition and adhesive film
  • Adhesive composition and adhesive film
  • Adhesive composition and adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] 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 butyl acrylate, 0.2 parts by weight of 8-hydroxyoctyl acrylate and 60 parts by weight of solvent (ethyl acetate) were added into the reaction device. Then, 0.1 parts by weight of azobisisobutyronitrile as a polymerization initiator was dropped over 2 hours, and reacted at 65° C. for 6 hours to obtain a compound used in Example 1 with a weight average molecular weight of 1 million or more. Acrylic Polymer Solution 1. A part of the acrylic polymer was taken and used as a sample for acid value measurement described later.

Embodiment 2～5 and comparative example 1～3

[0101] Except that the composition of each monomer was adjusted as described in the groups (1) and (2) in Table 1, the above-mentioned acrylic polymer solution 1 used in Example 1 was operated in the same manner to obtain the Acrylic polymer solutions in Examples 2-5 and Comparative Examples 1-3. In addition, although the measurement result is not shown in particular, the weight average molecular weight of the acrylic polymer contained in the acrylic polymer solution of Examples 2-5 and Comparative Examples 1-3 was 1 million or more.

[0102]

[0103] [Example 1]

[0104] To the acrylic polymer solution 1 of Example 1 produced as described above, 0.2 parts by weight of Coronate L (Coronate L) (trimethylolpropane (TMP) adduct of toluene diisocyanate (TDI) compound) was added , 0.05 parts by weight of KBM-403 (3-glycidoxypropyltrimethoxysilane) and stirred and mixed to obtain the adhesive composition of Example 1. This adhesive composition is coated on a release film made of...

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Abstract

The present invention relates to an adhesive layer having an excellent rework property and a high adhesion property despite being a thin film, and an adhesive film using the same. The adhesive layer contains an alkyl (meta) acrylate monomer having C1-C14 carbon numbers of an alkyl group and / or a (meta) acrylate monomer having an aromatic group (1); contains at least 30 parts by weight or more of butyl acrylate in the (1); excludes a carboxyl group containing copolymerizable vinyl monomer; contains 0.1-3.5 parts by weight of a hydroxyl containing copolymerizable vinyl monomer (2) for the (1); contains an acrylic polymer which is a copolymer having an acid value of 0.1 or less and a weight average molecular weight of 1 million or more; and contains 0.01-0.8 parts by weight of an isocyanate compound as a crosslinking agent (3) for the (1). The adhesive layer includes 40-75% of a gel fraction after crosslinking, 1-25 μm of a thickness, and 1.5-6.0 N / 25mm of an adhesive force of 25 μm thickness.

Description

technical field [0001] The present invention relates to an adhesive layer and an adhesive film used for lamination of optical components such as polarizing plates. Background technique [0002] Various adhesive films have been proposed for bonding optical components such as polarizing plates and retardation plates to adherends such as liquid crystal cells through an adhesive layer (for example, refer to Patent Documents 1 and 2). [0003] Patent Document 1 describes an optical adhesive composition containing butyl acrylate or the like as a main component monomer and containing an acrylamide compound or the like. [0004] Patent Document 2 describes an adhesive for optics that contains a (meth)acrylate having an alkyl group having 4 to 8 carbon atoms as a main component monomer, a carboxyl group-containing monomer, and a nitrogen-containing vinyl monomer. binder composition. [0005] In addition, in order to increase the refractive index of the adhesive layer, various adhes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J133/14C09J11/06C09J7/10C09J7/20C08F220/18C08F220/28G02B5/30
CPCC09J4/06C09J2203/318C09J7/385G02B5/30G06F3/041
Inventor 长仓毅长谷川良吉田弘幸菱沼昌世
Owner FUJIMORI KOGYO CO LTD
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