Removable water-dispersible acrylic-based adhesive composition and adhesive sheet

An acrylic, dispersion-type technology, applied in the direction of acidic copolymer adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of easy pollution, achieve low pollution, excellent re-peeling sexual effect

Inactive Publication Date: 2014-07-16
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Especially for water-dispersed acrylic adhesives, the emulsifier, which is one of the components, tends to segregate to the interface in the adhesive layer, so there is a problem that it transfers to the surface of the adherend and easily causes contamination.

Method used

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  • Removable water-dispersible acrylic-based adhesive composition and adhesive sheet
  • Removable water-dispersible acrylic-based adhesive composition and adhesive sheet
  • Removable water-dispersible acrylic-based adhesive composition and adhesive sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0223] (Preparation of Acrylic Emulsion Polymer (A))

[0224] Mix 90 parts by weight of water and raw material monomers and reactive surfactants (reactive surfactants that do not contain oxyalkylene groups) in the amount shown in Table 1 in the container, then stir and mix with a high-speed mixer, Prepare a monomer emulsion.

[0225] Then, 50 parts by weight of water, 0.01 part by weight of a polymerization initiator (ammonium persulfate) and 10 wt. amount, 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 weight) was added over 3 hours while stirring, and reacted at 75° C. for 3 hours. Then, it was cooled to 30° C., and adjusted to pH 8 by adding ammonia water at a concentration of 10% by weight to prepare an aqueous dispersion of an acrylic emulsion polymer (concentration of ...

Embodiment 2～20、 comparative example 1～8

[0231] As shown in Tables 1, 2, and 3, by changing the type and compounding amount of the raw material monomers, reactive surfactants, and the compounding amount of the surfactant (D), the re-peeling water-dispersible acrylic acid was obtained in the same manner as in Example 1. Adhesive-like composition and adhesive sheet.

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Abstract

The present invention provides a water-dispersible acrylic-based adhesive composition which offers excellent low-contamination properties for an adherend, and by which a removable adhesive layer can be formed. This removable water-dispersible acrylic-based adhesive composition is characterized in containing an acrylic emulsion polymer (A) configured with an alkyl (meth)acrylate ester and a carboxyl group-containing unsaturated monomer as requisite raw material monomers and polymerized by using a reactive surfactant containing no oxyalkylene group.

Description

technical field [0001] The present invention relates to a water-dispersible acrylic adhesive composition capable of forming a repeelable adhesive layer. Moreover, this invention relates to the PSA sheet which has the PSA layer formed from this PSA 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 protection film is pasted on the surface of the optical member (see Patent Documents 1 and 2). As these surface protection films, a re-peelable pressure-sensitive adhesive sheet provided with a re-peelable pressure-sensitive adhesive layer on the surface of a plastic film substrate is generally used. [0003] Conventionally, solvent-based acrylic adhesives have been used as adhesives for these surface protecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/06C09J7/02C09J11/06C09J133/02
CPCC08L2201/54C08L2312/00C09J7/385C09J133/02C09J133/08Y10T428/2848Y10T428/2891C08F220/1808C08F220/14C08F220/06B32B27/30C09J11/02C09J11/06C09J133/06
Inventor 高岛杏子三井数马森本有天野立巳米崎幸介
Owner NITTO DENKO CORP
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