MAIN AGENT FOR ADHESIVES AND PRODUCTION METHOD THEREOF, COMPOSITION FOR PREPARING URETHANE RESIN-BASED ADHESIVE, AND METHOD FOR PRODUCTION OF URETHANE RESIN-BASED ADHESIVES

摘要

PROBLEM TO BE SOLVED: To provide an adhesive having advantageous compatibility with acrylic adhesives and having removability which is hardly lowered even when the adhesive is aged in a high temperature atmosphere.;SOLUTION: This urethane resin-based adhesive is produced by a method including: ring-opening polymerizing an initiator (a) with a dicarboxylic anhydride (b) and an alkylene oxide (c) to obtain a polyester ether polyol (Z); reacting a polyol (A) containing the polyester ether polyol (Z) with a polyisocyanate (B1) to obtain an isocyanate group-terminal prepolymer (UI); reacting the isocyanate group-terminated prepolymer (UI) with a chain extender (C) having three or more active hydrogen groups having reactivities different from each other to obtain an acive hydrogen group-containing chain-extended polyurethane (UIH); and reacting a main agent for adhesives containing the acive hydrogen group-containing chain-extended polyurethane (UIH) with a curing agent containing a second polycyanate (B2).;COPYRIGHT: (C)2009,JPO&INPIT