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1. (WO2013146939) RE-PEELABLE EMULSION-BASED ADHESIVE COMPOSITION, RE-PEELABLE ADHESIVE SHEET, AND METHOD FOR MANUFACTURING RE-PEELABLE ADHESIVE SHEET

Pub. No.:    WO/2013/146939    International Application No.:    PCT/JP2013/059122
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Thu Mar 28 00:59:59 CET 2013
IPC: C09J 133/08
C09J 7/02
C09J 11/06
C09J 133/10
Applicants: LINTEC CORPORATION
リンテック株式会社
Inventors: IKEDA, Fuminori
池田 文徳
Title: RE-PEELABLE EMULSION-BASED ADHESIVE COMPOSITION, RE-PEELABLE ADHESIVE SHEET, AND METHOD FOR MANUFACTURING RE-PEELABLE ADHESIVE SHEET
Abstract:
An adhesive composition containing an emulsion-based copolymer (A), a cross-linking agent (B), a wetting agent (C), and an associative thickening agent (D); wherein the emulsion-based copolymer (A) in the re-peelable emulsion-based adhesive composition is a copolymer containing 70 to 99.5 mass% of component units (a1) derived from a (meth)acrylic acid ester for which the glass transition temperature (Tg) of the homopolymer is -40°C or lower, and 0.5 to 20 mass% of structural units (a2) derived from a monomer containing a functional group, and the copolymer is obtained by emulsification polymerization using an anionic emulsifying agent. In the re-peelable emulsion-based adhesive composition, the average particle diameter of the copolymer is 320 nm or larger, the amount of wetting agent (C) is 0.01 to 2.00 mass parts for 100 mass parts of the emulsion-based copolymer (A), and the re-peelable emulsion-based adhesive composition can form an adhesive layer on an adhesive sheet that has excellent mechanical stability, excellent application properties during high-speed application, and excellent re-peeling properties.