Adhesive, adhesive sheet using the same and method for producing adhesive sheet

A technology of adhesives and adhesive sheets, applied in the direction of adhesive types, ester copolymer adhesives, film/sheet adhesives, etc. Adhesion retention, the inability to optimize the curved surface of the base material, etc., to achieve the effect of preventing corrosion

Inactive Publication Date: 2010-10-06
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, even the aforementioned PSA composition still sometimes causes peeling of the PSA sheet due to the rebound force of the substrate, so it may not be preferably used for the curved surface of the substrate, etc.
In addition, since the above-mentioned adhesive composition is a so-called re-peelable adhesive that can be easily peeled off by a load, it does not have strong adhesive force even to the flat part of the substrate.
In addition, in recent years, adhesives have been required not only to have excellent adhesive force, but also to have characteristics that can prevent lateral displacement between substrates that is likely to occur at the initial stage of laminating two or more substrates, that is, generally used. said adhesive retention, but the adhesive described in Document 1 does not have good adhesive retention
[0006] As mentioned above, the actual situation is to seek an adhesive that combines excellent adhesive force that can be firmly adhered to the curved surface of the substrate and excellent adhesive retention that can prevent lateral displacement of the substrate. But the adhesive has not been found

Method used

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  • Adhesive, adhesive sheet using the same and method for producing adhesive sheet
  • Adhesive, adhesive sheet using the same and method for producing adhesive sheet

Examples

Experimental program
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Effect test

Embodiment

[0083] Hereinafter, the present invention will be described more specifically by way of examples and comparative examples.

[0084] [Preparation of Acrylic Polymer]

preparation example 1

[0086] 35 parts by mass of toluene were charged into a reaction container equipped with a stirrer, a thermometer, a reflux cooling pipe, and a dropping funnel, and heated to a temperature of 90°C.

[0087] Next, premix 1 containing 95 parts by mass of cyclohexyl methacrylate and 5 parts by mass of N,N-dimethylaminoethyl acrylate, and 2 parts by mass of azobisisobutyronitrile as a polymerization initiator and Premix 2 with 50 parts by mass of toluene was added dropwise into the reaction container. The dropwise addition of the premix 1 was carried out for 6 hours, and the dropwise addition of the premix 2 was carried out for 6.5 hours.

[0088] After completion|finish of said dripping, the reaction liquid obtained by further heating at the same temperature for 2 hours was mixed with toluene, and the nonvolatile matter was 50.6 mass % of acrylic polymer (A-1) solutions.

preparation example 2

[0090] 35 parts by mass of toluene were charged into a reaction container equipped with a stirrer, a thermometer, a reflux cooling pipe, and a dropping funnel, and heated to a temperature of 90°C.

[0091] Next, premix 3 containing 95 parts by mass of methyl methacrylate and 5 parts by mass of N,N-dimethylaminoethyl acrylate, and 2 parts by mass of azobisisobutyronitrile as a polymerization initiator and toluene 50 parts by mass of premix 4 were added dropwise into the reaction container. The dropwise addition of the premix 3 was carried out for 6 hours, and the dropwise addition of the premix 4 was carried out for 6.5 hours.

[0092] After completion|finish of said dripping, the reaction liquid obtained by further heating at the same temperature for 2 hours was mixed with toluene, and the nonvolatile matter was 50.4 mass % of acrylic polymer (A-2) solutions.

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Abstract

The invention provides an adhesive with excellent adhesion force and excellent adhesion The adhesion force is so excellent that even the shape of a base material for adhering the adhesion sheet is optionally one in curved surface portions including a plane portion or a R portion, a reversed R portion and etc, the age peeling of the adhesion sheet will not be generated owing to rebound force of the base material. The invention relates to an adhesive and an adhesive sheet using the same. The adhesive is characterized in that it contains an acrylic polymer (A) including a nitrogen-contained atom group with a weight mean molecular weight of 1000-50000, an acrylic polymer (B) with the weight mean molecular weight more than 500000 and a solvent (C); the acrylic polymer (A) does not have carboxyl and the acrylic polymer (B) does not have carboxyl and nitrogen-contained atom group. The invention also provides a method for producing the adhesive sheet.

Description

technical field [0001] The present invention relates to an adhesive that can be used for bonding various substrates represented by plastic substrates and metal substrates. Background technique [0002] In recent years, in the manufacture of various industrial products represented by automobiles and home appliances, foams such as polyurethane foam and difficult-to-adhesive substrates such as acrylonitrile-butadiene-styrene resin (ABS resin) have been used Parts with characteristic materials or shapes, such as substrates with complex shapes such as R parts or reverse R parts. In particular, parts with complex shapes have been widely used in recent years as industrial products become more functional. [0003] Adhesives have been used conventionally for the lamination of the above-mentioned components, but since the base material on the curved portion such as the R portion of the base material has a large resilience, even if the curved portion is pasted and bonded, The sheet al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/00C09J133/08C09J133/10C09J133/12C09J7/02
CPCC09J7/22C09J7/30C09J7/385C09J133/04C09J133/08C09J2301/302C09J2301/40
Inventor 山本辰弥大地尉夫
Owner DIC CORP
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