MATERIAL SET OF FORMING POLYURETHANE RESIN COATING FILM FORMED ON SUBSTRATE

摘要

Provided is a material set of a polyurethane resin coating film with excellent film strength formed on a substrate. The material set comprises both a polyol component prepared by reacting a polycarbonate polyol with polycaprolactone polyol and an isocyanato-terminated prepolymer prepared by reacting polytetramethylene glycol with a polyisocyanate, wherein the mass ratio of the polycarbonate polyol to the polycaprolactone polyol is 65/35 or higher. Further, the polyol component may additionally contain both an organometallic curing catalyst which takes the form of fine powder at ordinary temperatures, and a cure retarder.