Adhesive composition, adhesive layer, and adhesive sheet

An adhesive layer and adhesive technology, applied in the directions of non-polymer adhesive additives, adhesive types, adhesive additives, etc., can solve the problems of cumbersome, inability to use universal solvents, etc., to enhance mechanical properties , the effect of excellent refractive index and adhesion

Active Publication Date: 2010-07-21
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in practice, it is cumbersome to carry out various studies and optimal screening
In addition, depending on the situation, there are disadvantages such as not being able to use general-purpose solvents

Method used

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  • Adhesive composition, adhesive layer, and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0044] For the preparation of such a (meth)acrylic polymer, known production methods such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerizations can be appropriately selected. In addition, the obtained (meth)acrylic polymer may be any of a random copolymer, a block copolymer, a graft copolymer, and the like.

[0045] Moreover, in solution polymerization, ethyl acetate, toluene, etc. are used as a polymerization solvent, for example. As a specific example of solution polymerization, a polymerization initiator is added under an inert gas flow such as nitrogen, and the reaction is usually carried out at about 50 to 70° C. for about 5 to 30 hours.

[0046] The polymerization initiator, chain transfer agent, emulsifier, etc. used for the radical polymerization are not particularly limited, and may be appropriately selected and used. In addition, the weight average molecular weight of a (meth)acryl-type polymer can be controlle...

Embodiment 1

[0168] (Preparation of Acrylic Polymer)

[0169] 99.5 parts by weight of n-butyl acrylate, 0.5 parts by weight of 4-hydroxybutyl acrylate, 0.1 parts by weight of 2,2'-azobisisobutyronitrile as a polymerization initiator and 200 parts by weight of ethyl acetate were put into the equipment Into the four-necked flask with stirring blade, thermometer, nitrogen gas introduction pipe and cooler, introduce nitrogen gas while stirring slowly, replace with nitrogen gas for 1 hour, then keep the liquid temperature in the flask at around 55°C, and carry out polymerization reaction for 15 hours to prepare An acrylic polymer solution with a weight average molecular weight of 1,800,000 was produced. The glass transition temperature of the obtained polymer was 219K.

[0170] Next, 10 parts by weight of a silicone compound (KR-9706 manufactured by Shin-Etsu Chemical Co., Ltd.) was added to 100 parts by weight of titanium dioxide (TTO-51C manufactured by Ishihara Sangyo), and 330 parts by wei...

Embodiment 2

[0173] (Preparation of Acrylic Polymer)

[0174] The acrylic polymer solution obtained in Example 1 is diluted to 25% with ethyl acetate, 50 parts by weight of styrene and 0.2 parts by weight of benzoyl peroxide are added in the solution of 400 parts by weight, and the In the four-necked flask of the tube and the cooling tube, after the nitrogen gas was fully replaced, the polymerization reaction was carried out at 65° C. for 6 hours and at 70° C. for 6 hours while stirring under a nitrogen gas flow to obtain a graft polymer. The glass transition temperature of the graft portion of this polymer was 373K.

[0175] With respect to the solid content of 100 parts by weight of the polymer, in the obtained graft polymer solution, 10 parts by weight of the same titanium dioxide dispersion as in Example 1 and 80 parts by weight of styrene low-molecular-weight polymer solution dissolved in toluene were added in terms of solid content. (SX-85 manufactured by YASUHARA CHEMICAL Co., Ltd....

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Abstract

Disclosed is an adhesive composition which is capable of forming an adhesive layer having further improved mechanical characteristics, excellent refractive index and excellent adhesion, wherein metal fine particles are stably dispersed. Also disclosed are an adhesive sheet and the like using the adhesive composition. The adhesive composition contains: a (meth)acrylic polymer containing, as a monomer component, not less than 50% by weight of a (meth)acrylate expressed as CH2=C(R1)COOR2 (wherein R1 represents a hydrogen or a methyl group, and R2 represents an unsubstituted alkyl group having 1-20 carbon atoms or a substituted alkyl group), while containing substantially no acid component and having a weight average molecular weight as determined by gel permeation chromatography of not less than 500,000 but not more than 3,000,000; 5-100 parts by weight of an aromatic low-molecular-weight polymer having a weight average molecular weight as determined by gel permeation chromatography of not less than 500 but not more than 4,000, per 100 parts by weight of the (meth)acrylic polymer; and 5-100 parts by weight of metal fine particles having an average particle diameter of 5-100 nm, per 100 parts by weight of the (meth)acrylic polymer.

Description

technical field [0001] The present invention relates to an adhesive composition containing metal-based fine particles, an adhesive layer obtained from the adhesive composition, and a support having such an adhesive on at least one side thereof, which can be used in various fields. layer of adhesive sheet. Background technique [0002] Attempts have been made to improve the physical properties of adhesives or polymer compositions, mainly mechanical strength, by mixing various microparticles into adhesive or polymer compositions that have a wide range of applications. Generally, a method of uniformly dispersing the fine particles in the composition is employed by surface-treating the fine particles or treating the composition with various dispersing machines. [0003] For example, various silane coupling agents are added to the colloidal silica gel below 30nm to modify the silica surface, and then mixed with the polymer solution to prepare the adhesive. In the presence of par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/04C09J7/02C09J11/04C09J151/06C09J157/00G02B5/30
CPCC08F265/04C09J151/003C09J133/06C09J7/0217C08F265/06C09J7/385C08K3/08C08L51/003C08L2666/02Y10T428/25C09J11/04
Inventor 诸石裕平野敬祐中野史子田中亚树子
Owner NITTO DENKO CORP
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