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Adhesive layer and adhesive film

An adhesive layer and adhesive technology, applied in the direction of adhesive, adhesive type, ester copolymer adhesive, etc., can solve the problem of inability to fit the adherend

Active Publication Date: 2016-04-06
FUJIMORI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the adhesive layer in which the adhesive force is improved by copolymerizing carboxyl group-containing monomers and their copolymers, even if the thickness is reduced to 20 μm or less, it cannot be bonded due to the corrosion caused by the carboxyl group. On adherends affected by corrosion, such as ITO surfaces using ITO transparent conductive films

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

[0091] Nitrogen was introduced into a reaction apparatus equipped with a stirrer, a thermometer, a reflux condenser, and a nitrogen introduction pipe to replace the air in the reactor with nitrogen. After that, 60 parts by weight of butyl acrylate, 40 parts by weight of methyl acrylate, 10 parts by weight of N-methylpyrrolidone, 2.0 parts by weight of 6-hydroxyhexyl acrylate and 60 parts by weight of solvent (ethyl acetate) were added to the reaction device . Thereafter, 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 used as a sample for acid value measurement described later.

Embodiment 2～6 and comparative example 1～3

[0093] Except for adjusting the composition of each monomer as described in (A), (B), (C), and (C') of Table 1, it was the same as the above-mentioned acrylic copolymer solution 1 used in Example 1 It operated and obtained the acrylic acid copolymer solution used for Examples 2-6 and 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 2-6 and Comparative Examples 1-3 exists in the range of 200,000 to 2,000,000.

[0094]

[0095] [Example 1]

[0096] Add 0.5 parts by weight of Coronate L-45 (addition product of toluene diisocyanate (TDI) compound) to the acrylic copolymer solution 1 of Example 1 prepared as above, and stir and mix to obtain the binder combination of Example 1 thing. This adhesive composition was coated on a release film made of a silicone resin-coated polyethylene terephthalate (PET) film, and then dried at 90°...

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Abstract

The present invention provides an adhesive layer having a high adhesive force and high adhesion despite being a thin film with a thickness of 1 μm to 20 μm, and an adhesive film using the adhesive layer. The adhesive layer is formed by cross-linking an adhesive composition comprising an acrylic polymer, and is characterized in that the thickness of the adhesive layer is 1 μm to 20 μm, and the adhesive force at a thickness of 5 μm is 4.0 (N / 25mm) or more. The (meth)acrylate monomer of the binder composition as the main component contains at least one of (meth)acrylate alkyl monomers with alkyl carbon atoms of C1 to C14, and as other The copolymerizable monomer contains at least one of nitrogen-containing vinyl monomers, and the content of nitrogen-containing vinyl monomers is 5 to 50 parts by weight.

Description

technical field [0001] The present invention relates to an adhesive layer used for interlayer lamination of optical components and an adhesive film using the adhesive layer. Although the adhesive layer is a thin film with a thickness of 1 μm to 20 μm, it has High cohesion and high adhesion. 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 adhesive layers (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 optical fiber that uses a (meth)acrylate having an alkyl group with 4 to 8 carbon atoms as a main component monomer, and contains a carboxyl group-containing monomer and a nitrogen-containing vinyl mono...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/00C09J133/00C09J133/08C09J7/02
CPCC09J133/14C09J11/00C09J9/00C09J7/22C09J7/40G02B5/30G02F1/15
Inventor 长仓毅岛口龙介长谷川良
Owner FUJIMORI KOGYO CO LTD