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Adhesive composition and adhesive sheet

A technology of adhesives and compositions, applied in the direction of adhesive types, ester copolymer adhesives, polymer adhesive additives, etc., can solve the problem of not obtaining antistatic properties, re-peelable appearance characteristics, and difficult to deal with Surface protection film improvement requirements and other issues, to achieve the effect of excellent adhesion

Active Publication Date: 2014-10-15
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] As mentioned above, none of these solutions can solve the above-mentioned problems in a good balance. In the technical field related to electronic equipment, where static electricity and pollution become particularly serious problems, it is difficult to cope with the further development of surface protection films with antistatic properties and the like. There is a need for improvement, and in addition, water-dispersed acrylic adhesives with excellent antistatic properties, re-peelability (light-peelability) and appearance properties have not been obtained.

Method used

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  • Adhesive composition and adhesive sheet
  • Adhesive composition and adhesive sheet
  • Adhesive composition and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0257] (Preparation of Acrylic Emulsion Polymer)

[0258] Mix 90 parts by weight of water, 92 parts by weight of 2-ethylhexyl acrylate (2EHA), 4 parts by weight of acrylic acid (AA), and 4 parts by weight of methyl methacrylate (MMA) as shown in Table 1. 2 parts by weight of a nonionic anionic emulsifier (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., trade name "Aquaron HS-1025") was stirred and mixed with a high-speed mixer to prepare a monomer emulsion.

[0259] Then, 50 parts by weight of water and 0.07 parts by weight of a polymerization initiator (ammonium persulfate) were added to a reaction vessel having a condenser tube, a nitrogen gas introduction tube, a thermometer, and a stirrer, and after heating to 75° C., the mixture was stirred under a nitrogen atmosphere. , The above-mentioned monomer emulsion was added over 3 hours, and then emulsion polymerization was performed at 75° C. for 3 hours. Then, it was cooled to 30° C., and the pH was adjusted to 8 by a...

Embodiment 2～8、 comparative example 1～3

[0265] As shown in Table 1, a PSA composition and a PSA sheet were obtained in the same manner as in Example 1, changing the type and compounding amount of the raw material monomers, nonionic surfactant (acetylene glycol-based compound), and the like. In addition, about the additive which is not described in a table|surface, it prepared with the same compounding quantity as Example 1.

[0266] [Evaluation]

[0267] The water-dispersed acrylic pressure-sensitive adhesive compositions and pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples were evaluated by the following measurement methods or evaluation methods. In addition, the evaluation results are shown in Table 2.

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Abstract

The invention relates to an adhesive composition and an adhesive sheet. Provided is a water-dispersible acrylic pressure-sensitive adhesive composition which can form a pressure-sensitive adhesive layer excellent in antistatic property, repeeling property (light peeling property), and appearance property. The repeelable water-dispersible acrylic pressure-sensitive adhesive composition of the present invention contains an acrylic emulsion-based polymer composed of 70 to 99.5% by weight of a (meth)acrylic acid alkyl ester and 0.5 to 10% by weight of a carboxyl group-containing unsaturated monomer as monomer components, a crosslinking agent, an ionic compound, and a nonionic surfactant with an HLB value of 6 or more.

Description

technical field [0001] The present invention relates to a water-dispersible acrylic adhesive composition capable of forming a repeelable adhesive layer. Specifically, the present invention relates to a water-dispersed acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer excellent in antistatic properties, re-peelability (light-peelability), and appearance properties. Moreover, this invention relates to the adhesive sheet provided with the adhesive layer containing the said adhesive composition. Background technique [0002] During the manufacture and processing of optical components (optical materials) such as polarizing plates, retardation plates, anti-reflective films, etc., for the purpose of preventing surface scratches and stains, improving cutting processability, and suppressing cracks, etc. A surface protection film is attached to the surface of the optical member and used (see Patent Documents 1 and 2). As these sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J11/06C09J11/08C09J7/02
CPCC09J133/08C09J7/0217Y10T428/2891C09J2433/00C08L2201/54C08L2312/00C09J7/385C08F220/1808C08F220/06C08F220/14C09J133/06
Inventor 高岛杏子森本有三井数马米崎幸介北原纲树
Owner NITTO DENKO CORP
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