WATER-BASED POLYURETHANE RESIN COMPOSITION, ONE-PACK TYPE ADHESIVE COMPRISING THE SAME, LAMINATE, AND PROCESS FOR PRODUCING WATER-BASED POLYURETHANE RESIN COMPOSITION

摘要

A water-based polyurethane resin composition which is obtained by reacting a polyisocyanate (A) with polyfunctional compounds (B) comprising a polyester polyol (B1) having an acid group and other polyol (B2) and/or a chain extender (B3) so as to satisfy the requirement represented by the following numerical formula (1) to obtain a neutralized isocyanate-terminated prepolymer, subjecting the neutralized prepolymer to a chain extension reaction using a polyamine (C) having two or more amino and/or imino groups and water (D) so as to satisfy the requirements represented by the following numerical formulae (2) and (3),and then dispersing the reaction mixture in water. 100/80 ≤ a/b ≤ 100/40 (1) 100/98 ≤ a/(b+c) ≤ 100/80 (2) 100/105 ≤ a/(b+c+2d) ≤ 100/95 (3) (In the formulae (1) to (3), a indicates the number of isocyanate groups (NCO) contained in the polyisocyanate (A); b indicates the number of hydroxy groups (OH) contained in the polyfunctional compounds (B); c indicates the number of amino groups (NH2) and/or imino groups (NH) contained in the polyamine (C); and d indicates the number of moles of the water (D).)