POLYESTER POLYOL, POLYURETHANE UTILIZING THE POLYESTER POLYOL AND PROCESS FOR PRODUCTION THEREOF, AND POLYURETHANE MOLDED ARTICLE

摘要

A process for producing a polyurethane, which comprises using a polyester polyol (a-1), a polyether polyol (b), an isocyanate compound (c) and a chain extender (d) as a raw material to produce a polyurethane, wherein the polyester polyol (a-1) is a polyester polyol (a-1) obtained by forming an ester bond between either a carboxyl group of a polycarboxylic acid (i-1) having a polysiloxane framework and a plurality of carboxyl groups or an ester group of a polycarboxylic acid ester (i-2) having a polysiloxane framework and a plurality of ester groups, and a hydroxyl group of a polyether polyol (ii).