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Water-dispersible acrylic pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, and pressure-sensitive adhesive sheet

一种丙烯酸、分散型的技术，应用在非高分子粘合剂添加剂、酸性共聚物粘合剂、聚醚粘合剂等方向，能够解决污染、尚未得到外观特性和再剥离性水分散型丙烯酸类粘合剂等问题，达到低污染性、优良外观特性、优良防静电性的效果

Active Publication Date: 2016-03-02
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] 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 the surface protection film of etc., and a water-dispersed acrylic adhesive with excellent appearance characteristics and re-peelability has not yet been obtained

Method used

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  • Water-dispersible acrylic pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, and pressure-sensitive adhesive sheet
  • Water-dispersible acrylic pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, and pressure-sensitive adhesive sheet
  • Water-dispersible acrylic pressure-sensitive adhesive composition, pressure-sensitive adhesive layer, and pressure-sensitive adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0310] (Preparation of Acrylic Emulsion Polymer)

[0311] Mix 90 parts by weight of water in the container, and 94 parts by weight of 2-ethylhexyl acrylate (2EHA) as shown in Table 1, 2 parts by weight of methyl methacrylate (MMA), 4 parts by weight of acrylic acid (AA), react 6 parts by weight of a nonionic anionic emulsifier (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., trade name "Aquaron HS-10"), and then stirred and mixed with a high-speed mixer to prepare a monomer emulsion. Then, 50 parts by weight of water, 0.01 part by weight of a polymerization initiator (ammonium persulfate) and 10% by weight of the monomer emulsion prepared above are added to a reaction vessel having a condenser tube, a nitrogen introduction tube, a thermometer and an agitator. amount, emulsion polymerization was carried out at 75° C. for 1 hour while stirring. Thereafter, 0.07 parts by weight of a polymerization initiator (ammonium persulfate) was added, and the remaining whole monomer...

Embodiment 1-2～1-8 and comparative example 1-1～1-6

[0317] As shown in Table 1 and Table 2, a monomer emulsion was prepared in the same manner as in Example 1-1, changing the types and compounding amounts of the raw material monomers and emulsifiers. Moreover, using the said monomer emulsion, it carried out similarly to Example 1-1, and obtained the water dispersion type acrylic adhesive composition and the adhesive sheet. In addition, Table 1 and Table 2 show the solvent-insoluble content and the weight-average molecular weight (Mw) of the solvent-soluble content of the acrylic emulsion polymers obtained in Examples and Comparative Examples.

[0318] [evaluate]

[0319] 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 1 and Table 2.

[0320] (1) Elongation at break of crosslinked acrylic adhesi...

Embodiment 2-1

[0377] (Preparation of Acrylic Emulsion Polymer)

[0378] Mix 90 parts by weight of water in the container, and 94 parts by weight of 2-ethylhexyl acrylate (2EHA) as shown in Table 3, 2 parts by weight of methyl methacrylate (MMA), 4 parts by weight of acrylic acid (AA), react 6 parts by weight of a nonionic anionic emulsifier (manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd., trade name "Aquaron HS-10"), and then stirred and mixed with a high-speed mixer to prepare a monomer emulsion. Then, 50 parts by weight of water, 0.01 part by weight of a polymerization initiator (ammonium persulfate) and 10% by weight of the monomer emulsion prepared above are added to a reaction vessel having a condenser tube, a nitrogen introduction tube, a thermometer and an agitator. amount, emulsion polymerization was carried out at 75° C. for 1 hour while stirring. Thereafter, 0.07 parts by weight of a polymerization initiator (ammonium persulfate) was added, and the remaining whole monomer...

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Abstract

Provided is a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer that can prevent static build-up at the time of peeling (antistatic properties), is superior in removability, in the ability to prevent an increase in peel strength (adhesive strength) over time among the adhesive properties, as well as in appearance properties (decrease of appearance defects due to dents or the like), and also in less-staining properties on adherends, particularly, in the ability to prevent white staining on adherends in high-humidity environments (the ability to prevent white staining). The water-dispersible acrylic pressure-sensitive adhesive composition according to the invention contains an acrylic emulsion polymer containing, as monomer components, (i) an alkyl (meth)acrylate, (ii) a carboxyl group-containing unsaturated monomer, and (iii) at least one monomer selected from the group consisting of methyl methacrylate, vinyl acetate, and diethylacrylamide, and an ionic compound, and is characterized in that 70 to 99.5% by weight of the alkyl (meth)acrylate (i) is contained in the total amount of the monomer components.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of October 12, 2012 and an application number of 201280051422.0. technical field [0002] The present invention relates to a water-dispersible acrylic pressure-sensitive adhesive composition capable of forming a re-peelable pressure-sensitive adhesive layer. More specifically, the present invention relates to an antistatic property, re-peelability, adhesive properties, reduction of appearance defects caused by dents, etc., particularly excellent appearance properties, low contamination of adherends, and time-dependent peeling force. (Adhesive Force) A water-dispersed acrylic pressure-sensitive adhesive composition for a pressure-sensitive adhesive layer having excellent rising properties. Moreover, this invention relates to the adhesive sheet provided with the adhesive layer formed from the said adhesive composition. [0003] The present invention relates to water-disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/08C09J7/02C09J7/22C09J7/38
CPCC09J133/08C08L2201/50C08G77/46C08K5/0075C09J2203/318C09J2433/00C09J133/02C09J133/26C08L2201/54C09J171/02C08G2650/58C09J7/38C09J7/22C08L33/02Y10T428/2891C09J2301/408C08F220/1808C08F220/06C08F220/14C08F218/08C08F220/54B32B27/30C09J11/02C09J11/06C09J133/06
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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