METHOD FOR PRODUCING ACRYLIC VISCOELASTIC LAYER WITH COMBINATION OF PHOTOPOLYMERIZATION REACTION AND REDOX POLYMERIZATION REACTION, AND ADHESIVE TAPE OR SHEET

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an acrylic viscoelastic layer, capable of remarkably reducing the residual quantity of an unreacted monomer without reduction in productivity while maintaining the viscoelastic property.;SOLUTION: The method for producing an acrylic viscoelastic layer comprises polymerizing an acrylic monomer composition or a partially polymerized composition thereof with a combination of a photopolymerization reaction using a photopolymerization initiator which is cleaved by active energy beam with a redox polymerization reaction by effects of an oxidizing agent and a reducing agent. In the combination of the photopolymerization reaction using the photopolymerization initiator which is cleaved by active energy beam with the redox polymerization reaction by effects of the oxidizing agent and reducing agent, the photopolymerization reaction and the redox polymerization reaction may be progressed together by irradiating an acrylic monomer composition including a photopolymerization initiator cleaved by the active energy beam, the oxidizing agent and reducing agent or a partially polymerized composition thereof with the active energy beam.;COPYRIGHT: (C)2009,JPO&INPIT