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Photocurable adhesive composition, photocurable adhesive layer, and photocurable adhesive sheet

An adhesive layer, light-curing technology, applied in the direction of adhesive types, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as difficulty in preventing glue leakage, and achieve excellent adhesion and heat resistance. Excellent performance and easy handling

Active Publication Date: 2014-08-20
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since it contains low-molecular-weight epoxy resin, etc., it is difficult to prevent bleeding, etc. during temporary bonding

Method used

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  • Photocurable adhesive composition, photocurable adhesive layer, and photocurable adhesive sheet
  • Photocurable adhesive composition, photocurable adhesive layer, and photocurable adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] (Preparation of Acrylic Polymer)

[0138] In a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen inlet tube, and a condenser, 99 parts by weight of n-butyl acrylate, 1 part by weight of 4-hydroxybutyl acrylate, and 0.1 part by weight of 2,2' as a polymerization initiator - Azobisisobutyronitrile was charged together with 200 parts by weight of ethyl acetate, nitrogen replacement was carried out for 1 hour while slowly stirring, and then the liquid temperature in the flask was kept at around 55°C to carry out polymerization reaction for 10 hours , to prepare an acrylic polymer solution with a weight average molecular weight of 1.8 million. The glass transition temperature of the obtained acrylic polymer was 225K.

[0139] (Preparation of graft polymer)

[0140] The obtained acrylic polymer solution was diluted with ethyl acetate so that the solid content would be 25%, to prepare a diluted solution (I). In a four-necked flask equipped with sti...

Embodiment 2

[0147] (Preparation of Acrylic Polymer)

[0148] In a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen inlet tube, and a condenser, 99 parts by weight of n-butyl acrylate, 1 part by weight of 4-hydroxybutyl acrylate, and 0.1 part by weight of 2,2' as a polymerization initiator - Azobisisobutyronitrile was charged together with 200 parts by weight of ethyl acetate, nitrogen replacement was carried out for 1 hour while slowly stirring, and then the liquid temperature in the flask was kept at around 55°C to carry out polymerization reaction for 10 hours , to prepare an acrylic polymer solution with a weight average molecular weight of 1.8 million. The glass transition temperature of the obtained acrylic polymer was 225K.

[0149] (Preparation of graft polymer)

[0150] The obtained acrylic polymer solution was diluted with ethyl acetate so that the solid content would be 25%, to prepare a diluted solution (I). In a four-necked flask equipped with sti...

Embodiment 3

[0157] (Preparation of Acrylic Polymer)

[0158] In a four-necked flask equipped with a stirring blade, a thermometer, a nitrogen inlet tube, and a condenser, 99 parts by weight of n-butyl acrylate, 1 part by weight of 4-hydroxybutyl acrylate, and 0.1 part by weight of 2,2' as a polymerization initiator - Azobisisobutyronitrile was charged together with 200 parts by weight of ethyl acetate, nitrogen replacement was carried out for 1 hour while slowly stirring, and then the liquid temperature in the flask was kept at around 55°C to carry out polymerization reaction for 10 hours , to prepare an acrylic polymer solution with a weight average molecular weight of 1.8 million. The glass transition temperature of the obtained acrylic polymer was 225K.

[0159] (Preparation of graft polymer)

[0160] The obtained acrylic polymer solution was diluted with ethyl acetate so that the solid content would be 25%, to prepare a diluted solution (I). In a four-neck flask equipped with stirr...

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Abstract

The object of the present invention is to provide a photocurable adhesive composition, a photocurable adhesive layer, a photocurable adhesive sheet, etc., the photocurable adhesive composition The product has no bleeding under normal temperature and normal pressure, has sufficient initial adhesive force by drying and crosslinking, is easily cured by light irradiation, and can form an adhesive adhesive layer with high peel resistance. A photocurable adhesive composition containing an adhesive, a photocurable adhesive layer using the same, and a photocurable adhesive sheet are prepared. The graft polymer is formed by graft-polymerizing a monomer containing a cyclic ether group on a (meth)acrylic polymer and a photocationic polymerization initiator.

Description

technical field [0001] The present invention relates to a photocurable adhesive composition, a photocurable adhesive layer, and a photocurable adhesive in which such a photocurable adhesive layer is formed on at least one side of a support. adhesive sheet. Background technique [0002] In recent years, optical components used in electronic devices such as liquid crystal display devices, such as polarizing plates, retardation plates, and the like, are attached to liquid crystal cells using adhesives. As such an adhesive, an acrylic adhesive is widely used because it is excellent in heat resistance and light resistance. [0003] However, acrylic adhesives do not exhibit high peel resistance like adhesives. [0004] In addition, as an adhesive sheet, a thermosetting adhesive sheet that is cured by heat treatment has been proposed for bonding applications such as electronic devices. Although such thermosetting adhesives are excellent in bonding strength and heat resistance, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J151/06C08F265/06C08G59/68C09J7/02C09J11/06C09J163/00C09J7/38
CPCC08F265/06C08L33/06C09J2451/00C09J163/00C09J7/0207C09J151/06C09J171/02C09J2463/00C08L2666/04C08L2666/14C09J7/38
Inventor 藤田茂诸石裕中野史子
Owner NITTO DENKO CORP
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