PRIMER COMPOSITION, CIVIL ENGINEERING AND BUILDING STRUCTURE AND CONSTRUCTION METHOD OF CIVIL ENGINEERING AND BUILDING STRUCTURE

摘要

PPROBLEM TO BE SOLVED: To provide a primer composition with excellent interlayer adhesiveness when the recoating time is taken long such that the primer composition is applied to a substrate, left for 24 hours and then coated with a radical polymerizable unsaturated resin coating material, and with a long pot life for coating, civil engineering and building structures using the same and a construction method of the civil engineering and building structure using the same. PSOLUTION: The primer composition contains an isocyanate group and polymerizable unsaturated double bond-containing urethane compound (A) prepared by reacting an isocyanate group-containing urethane prepolymer (A1) obtained by reacting a polyether polyol (a1) with a polyisocyanate compound (a2) containing a mixture of diphenylmethane-2,4'-diisocyanate (a2-1) and diphenylmethane-4,4'-diisocyanate (a2-2), with a compound (A2) having a hydroxy group and a polymerizable unsaturated double bond, and 0.02 to 0.5 mass% of a blowing catalyst (B) containing 2,2'-dimorpholinodiethyl ether. PCOPYRIGHT: (C)2009,JPO&INPIT