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Multilayer adhesive articles and adhesive sheets

A technology of adhesiveness and articles, applied in the direction of adhesive type, conductive adhesive, acidic copolymer adhesive, etc., can solve the problems of easy peeling and weak bonding force, and achieve the effect of inhibiting interlayer peeling

Inactive Publication Date: 2015-11-25
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the pressure-sensitive adhesive tape in which the adhesive layer is formed into a multilayer structure as described above has the following disadvantages: the bonding force between the layers is weak, and the layers are easily peeled off due to external stress such as shear force.

Method used

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  • Multilayer adhesive articles and adhesive sheets
  • Multilayer adhesive articles and adhesive sheets
  • Multilayer adhesive articles and adhesive sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0153] (Synthesis of Acrylic Polymer (a))

[0154] Put 229 parts of ethyl acetate, 0.2 parts of azobisisobutyronitrile, 95 parts of n-butyl acrylate and 5 parts of acrylic acid into a reactor with a thermometer, a stirrer, a nitrogen gas inlet tube and a reflux condenser tube, and carry out at 60 ° C. Solution polymerization was carried out to obtain an acrylic polymer solution A having a concentration of the acrylic polymer (a) of 30% by weight. The weight average molecular weight of the said acrylic polymer (a) was 750,000.

[0155] (Synthesis of Acrylic Polymer (b))

[0156] In the reactor with thermometer, stirrer, nitrogen inlet pipe and reflux condenser, drop 146 parts of ethyl acetate, 0.2 part of azobisisobutyronitrile, 95 parts of 2-ethylhexyl acrylate and 5 parts of acrylic acid, Solution polymerization was performed at 60° C. to obtain an acrylic polymer solution B having a concentration of the acrylic polymer (b) of 40% by weight. The weight average molecular we...

Embodiment 2～14

[0163] [Examples 2 to 14, Comparative Example 1]

[0164] The types and amounts of the monomers used in the synthesis of the acrylic polymers (a) to (c), the amount of the crosslinking agent, and the thickness of each adhesive layer were changed to the values ​​described in Table 1 and Table 2 , except that, the same operation as in Example 1 was performed, and each adhesive tape was produced.

Embodiment 15

[0166] (Synthesis of Acrylic Polymer (a))

[0167] Put 229 parts of ethyl acetate, 0.2 parts of azobisisobutyronitrile, 95 parts of n-butyl acrylate and 5 parts of acrylic acid into a reactor with a thermometer, a stirrer, a nitrogen gas inlet tube and a reflux condenser tube, and carry out at 60 ° C. Solution polymerization was carried out to obtain an acrylic polymer solution A having a concentration of the acrylic polymer (a) of 30% by weight. The weight average molecular weight of the said acrylic polymer (a) was 750,000.

[0168] (Synthesis of Acrylic Polymer (b))

[0169] In the reactor with thermometer, stirrer, nitrogen inlet pipe and reflux condenser, drop 146 parts of ethyl acetate, 0.2 part of azobisisobutyronitrile, 95 parts of 2-ethylhexyl acrylate and 5 parts of acrylic acid, Solution polymerization was performed at 60° C. to obtain an acrylic polymer solution B having a concentration of the acrylic polymer (b) of 40% by weight. The weight average molecular we...

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Abstract

The present invention provides a multi-layered PSA article having higher interlayer adhesive strength. The multi-layered PSA article of the present invention comprises a PSA layer (A) formed from a PSA composition (a) comprising as a primary component an acrylic polymer (a) obtained by polymerizing a monomer composition (a), a PSA layer (B) formed from a PSA composition (b) comprising as a primary component an acrylic polymer (b) obtained by polymerizing a monomer composition (b), and an intermediate layer (C) placed between the PSA layer (A) and the PSA layer (B), wherein the acrylic polymer (a) and the acrylic polymer (b) comprise an acidic group, and the intermediate layer (C) is formed from an intermediate layer composition (c) comprising a polymer (c) having a primary to tertiary amino group.

Description

technical field [0001] The present invention relates to a multilayer adhesive article and an adhesive sheet obtained by forming the multilayer adhesive article into a sheet shape. This application claims the priority based on the JP Patent application 2011-147446 for which it applied on July 1, 2011, The content of this application is taken in into this specification as a reference. Background technique [0002] Conventionally, pressure-sensitive adhesive tapes such as double-sided adhesive tapes have been required to have contradictory properties such as high wettability to adherends, adhesiveness, and high cohesion at the same time. In addition, when bonding two adherends with different surface properties, it is difficult for a pressure-sensitive adhesive composed of the same composition to exert good adhesive properties on either of the two adherends. It is handled in a balanced way between the characteristics. [0003] In order to improve such aspects, it has been carr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J7/00C09J9/02C09J133/00C09J7/38C09J7/22
CPCC09J7/0217C09J7/0246C09J133/02C09J2201/128C09J2433/00C09J2433/006Y10T428/2848C09J7/38C09J7/22C09J2301/124
Inventor 白井光义船津绘里子每川英利
Owner NITTO DENKO CORP
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