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Water-dispersed acrylic adhesive composition and adhesive sheet

An acrylic, dispersive technology, applied in the direction of non-polymer adhesive additives, adhesive types, conductive adhesives, etc., can solve the problems of pollution, not yet obtained re-peelability, etc., to achieve low pollution, appearance characteristics Excellent, excellent anti-whitening pollution effect

Active Publication Date: 2017-07-28
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] However, as mentioned above, in any of these prior arts, the above-mentioned problems cannot be solved in a balanced manner. In the technical field related to electronic equipment, where static electricity and pollution are particularly serious problems, it is difficult to deal with antistatic products. There is a need for further improvement of surface protection films such as the

Method used

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  • Water-dispersed acrylic adhesive composition and adhesive sheet
  • Water-dispersed acrylic adhesive composition and adhesive sheet
  • Water-dispersed acrylic adhesive composition and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0256] (Preparation of Acrylic Emulsion Polymer)

[0257] 90 parts by weight of water, 96 parts by weight of 2-ethylhexyl acrylate (2EHA), 4 parts by weight of acrylic acid (AA), and a reactive nonionic anionic emulsifier (manufactured by ADEKA Co., Ltd.) are mixed in the container. , trade name "Adecariasorp SE-10N") 3 parts by weight, and then stirred and mixed with a high-speed mixer to prepare a monomer emulsion.

[0258] Then, 50 parts by weight of water, 0.01 part by weight of a polymerization initiator (ammonium persulfate) and an amount equivalent to 10% by weight in the aforementioned monomer emulsion were added to a reaction vessel having a condenser tube, a nitrogen gas introduction tube, a thermometer, and a stirrer, Emulsion polymerization was carried out at 75° C. for 1 hour while stirring. Then, 0.07 parts by weight of a polymerization initiator (ammonium persulfate) was further added, and the remaining whole monomer emulsion (an amount corresponding to 90% by ...

Embodiment 2～8、 comparative example 1～5

[0264] As shown in Tables 1 and 2, monomer emulsions were prepared in the same manner as in Example 1, changing the types and compounding amounts of the raw material monomers and ionic liquids, and the like. In addition, additives not described in the table were prepared in the same compounding quantities as in Example 1. Moreover, using the said monomer emulsion, it carried out similarly to Example 1, and obtained the water dispersion type acrylic adhesive composition and the adhesive sheet.

[0265] [Evaluation]

[0266] The water-dispersible 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 Tables 1 and 2.

[0267] (1) Stripping electrostatic voltage

[0268] The prepared adhesive sheet was cut into a size of 70 mm in width and 130 mm in length, and after the separat...

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Abstract

The present invention provides excellent adhesion, antistatic properties, re-peelability, anti-peeling force (adhesive force) increase over time, and excellent appearance characteristics, and low pollution to the adherend, especially in high humidity environments. A water-dispersed acrylic pressure-sensitive adhesive composition that produces an adhesive layer excellent in preventing whitening stains (whitening stain prevention) on an adherend. The water-dispersed acrylic adhesive composition of the present invention is characterized in that it contains 70 to 99.5% by weight of alkyl (meth)acrylate and 0.5 to 10% by weight of carboxyl group-containing unsaturated monomers as monomers Acrylic emulsion polymer, water-insoluble ionic liquid, and acetylene glycol compound and / or its derivatives with HLB value less than 13.

Description

technical field [0001] The present invention relates to a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a re-peelable pressure-sensitive adhesive layer. Specifically, the present invention relates to an adhesive layer capable of forming an adhesive layer excellent in antistatic properties, re-peelability (light-peelability), low-contamination properties to adherends, and excellent resistance to increase in peeling force (adhesive force) over time. Water-dispersible acrylic adhesive composition. Moreover, this invention relates to the adhesive sheet provided with the adhesive layer containing the said adhesive composition. Background technique [0002] In the manufacturing and processing of optical members (optical materials) such as polarizing plates, retardation plates, and anti-reflection films, for the purpose of preventing surface scratches and stains, improving cutting processability, and suppressing cracks, etc., A surface prote...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/00B32B27/00B32B27/30C09J7/02C09J9/02C09J11/06C09J7/22C09J7/38
CPCC09J9/02C08F220/08C09J133/08C08K5/0075C09J2203/318C09J2433/00C08K5/19C08K5/34C09J7/38C09J7/22Y10T428/2891C09J2301/408C08F220/1808C08F220/06B32B27/30C09J11/06C09J133/00
Inventor 天野立巳森本有三井数马米崎幸介高岛杏子
Owner NITTO DENKO CORP
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