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Adhesives and Adhesive Sheets

A technology of adhesives and thin sheets, applied in the direction of adhesive types, ester copolymer adhesives, adhesives, etc., can solve the problems of low concentration, difficult to thick adhesive layer, etc., and achieve high workability and good workability , the effect of improving mobility

Active Publication Date: 2015-12-09
SOKEN CHEM & ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in conventional adhesives mainly composed of high-molecular-weight polymers, a large amount of solvent is required to optimize the viscosity at the time of coating, so the concentration of polymer non-volatile components in the coating liquid Low, and it is difficult to form a thick adhesive layer with one coat

Method used

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  • Adhesives and Adhesive Sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Manufacture of adhesive sheets:

[0046] In a reaction device equipped with a stirrer, a reflux cooler, a thermometer, and a nitrogen introduction pipe, 60 parts by mass of methoxyethyl acrylate (MEA), 31 parts by mass of butyl acrylate (BA), and 5 parts by mass of acrylic acid 2-hydroxyethyl ester (HEA), 2 parts by mass of acrylamide (AM), 100 parts by mass of methyl ethyl copper (MEK), and 0.1 part by mass of 2,2'-azobisisobutyronitrile, And the air in the reaction container was replaced with nitrogen. Next, the temperature was raised to 70° C. while stirring under a nitrogen atmosphere, and thereafter, the reaction was performed for 5 hours. After the reaction, the mixture was diluted with methyl ethyl ketone until the concentration of non-volatile components was 40% by mass, thereby obtaining a (meth)acrylic polymer solution.

[0047] With respect to 100 parts by mass of the solid content of the (meth)acrylic polymer solution obtained above, 0.4 parts by mass of a...

Embodiment 2

[0049] Manufacture of adhesive sheets:

[0050] In Example 1, except that HEA was changed to 7 parts by mass and AM was changed to 2 parts by mass of diethylaminoethyl acrylate (DMAEA), an adhesive was produced in the same manner as in Example 1. and adhesive sheets.

Embodiment 3

[0052] Manufacture of adhesive sheets:

[0053] In Example 1, except that MEA was changed to 25 parts by mass, HEA was changed to 7 parts by mass, and BA was changed to 61 parts by mass, the adhesive and bonding agent were produced in the same manner as in Example 1. Flakes.

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Abstract

Provided is an adhesive that satisfies all the performances on corrosiveness of metal such as ITO, whitening of heat and humidity, and heat-resistant effervescent, and has good workability. [Solution] An adhesive characterized by containing an acrylic polymer that is obtained by copolymerizing the following (a1) to (a3), (a1) 20 to 99.8% by mass of alkoxyalkyl(meth)acrylate, (a2) 0.1 to 10% by mass of monomers containing crosslinkable functional groups, and (a3) 0.1 to 5% by mass of hydrogen bond monomers, and has a weight-average molecular weight of 50,000 to 400,000 and substantially no carboxyl group-containing monomer, and (b) an isocyanate-based crosslinking agent; and a pressure-sensitive adhesive sheet characterized by arranging a pressure-sensitive adhesive layer that is formed on at least one surface of a support by the aforementioned adhesive.

Description

technical field [0001] The present invention relates to an adhesive and an adhesive sheet that can be used for bonding optical components constituting a touch panel or the like. Background technique [0002] The touch panel is a laminate of various materials, and acrylic adhesives are mainly used for bonding. Since the touch panel is provided on the outermost surface of the screen, the adhesive for the touch panel requires the same heat resistance or heat and humidity resistance as that of a liquid crystal display or a plasma display. [0003] Currently, in resistive touch panels, which are the mainstream of touch panels, various adhesives are used for bonding polycarbonate (PC), in-membrane film (IMD), or both. [0004] However, due to the material characteristics of PC, degassing occurs under high-temperature conditions and moisture easily permeates, so there are problems such as foaming under heat-resistant conditions, and generation of moisture due to heat and humidity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/14C09J7/02G02F1/1335
CPCC09J133/062C08K5/29C09J7/0217C09J133/066C09J2203/318C09J7/385C08F220/281C08F220/1804C08F220/06C08F220/20C08F220/56C08F220/34C09J7/28G06F3/0416C09J133/14C09J11/06C08K5/0025G06F3/0412
Inventor 金塚洋平工藤良太
Owner SOKEN CHEM & ENG CO LTD
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