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Bonding agent layer and adhesive film

An adhesive layer, adhesive technology, applied in the direction of adhesives, adhesive types, ester copolymer adhesives, etc., can solve problems such as insufficient adhesion

Active Publication Date: 2015-07-29
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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  • Bonding agent layer and adhesive film
  • Bonding agent layer and adhesive film
  • Bonding agent layer and adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097]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, added 90 parts by weight of butyl acrylate, 10 parts by weight of benzyl acrylate, 10 parts by weight of N-vinylpyrrolidone, 2.5 parts by weight of 6-hydroxyhexyl acrylate, and added 60 parts by weight of Parts by weight of solvent (ethyl acetate). 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 acrylic acid used in Example 1 with a weight average molecular weight of 500,000. Copolymer Solution 1. A part of the acrylic copolymer was taken and used as a sample for acid value measurement described later.

Embodiment 2～5 and comparative example 1～3

[0099] Except that the composition of each monomer was adjusted as described in (A) to (D) of Table 1, the above-mentioned acrylic copolymer solution 1 used in Example 1 was operated in the same manner to obtain the 2-5 and the acrylic acid copolymer solutions of Comparative Examples 1-3. Here, although the measurement result is not shown in particular, the weight average molecular weight of the copolymer contained in the acrylic copolymer solution of Examples 2-5 and Comparative Examples 1-3 exists in the range of 200,000 to 2,000,000.

[0100]

[0101] [Example 1]

[0102] To the acrylic copolymer solution 1 of Example 1 produced as described above, 0.5 parts by weight of Coronate HX (Coronate HX) (isocyanurate of a hexamethylene diisocyanate compound) was added and mixed with stirring to obtain The binder composition of Example 1. This adhesive composition was coated on a release film made of a polyethylene terephthalate (PET) film coated with a silicone resin, and drie...

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Abstract

The invention provides a bonding agent layer in the form of a film 1-20 [mu]m in thickness and high in both bonding power and adhesiveness, and an adhesive film provided with the bonding agent layer. In the bonding agent layer formed through crosslinking binder compositions containing acrylic polymers, the acrylic polymers are composed of at least one selected from C1-C14 (methyl) alkyl acrylate monomers and at least one selected from aryl-contained (methyl) alkyl acrylate monomers. Meanwhile, speaking of other co-polymerizable monomers, the bonding agent layer comprises at least one selected from N-contained vinyl monomers and at least one selected from hydroxyl-contained copolymerizable vinyl monomers. The cross-linking agent is in the form of a trifunctional isocyanate compound. The thickness of the bonding agent layer is 1-20 [mu]m. When the thickness of the bonding agent layer is 20 [mu]m, the initial bonding power is over 3.0 (N / 25 mm). Meanwhile, the refractive index is approximately 1.47-1.50.

Description

technical field [0001] The present invention relates to an adhesive layer and an adhesive film used for interlayer bonding of optical components and the like. More specifically, the present invention provides an adhesive layer having a high adhesive force and high adhesive properties although it is a thin film having a thickness of 1 μm to 20 μm, and an adhesive film using the adhesive layer. . 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 a monomer mainly composed of (meth)acrylate having an alkyl group having 4 to 8 carbon atoms, an...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J133/08C09J11/06C08F220/18C08F226/10
CPCC09J7/385C09J7/40C09J7/401C09J133/06C09J2203/318
Inventor 长仓毅岛口龙介长谷川良
Owner FUJIMORI KOGYO CO LTD