POLYURETHANE DERIVED FROM BIOMASS RESOURCES, METHOD FOR PRODUCING SAME, AND POLYESTER POLYOL DERIVED FROM BIOMASS RESOURCES

摘要

A novel polyester polyol for obtaining an environmentally friendly polyurethane, which is easily controllable in polyurethane reaction and has excellent elasticity and elastic modulus in polyurethane, while maintaining heat resistance, weather resistance, and water resistance as characteristics of a polyurethane derived from a polyester polyol; and a polyurethane using this novel polyester polyol, are provided. The invention relates to a method for producing a biomass-resource-derived polyurethane, which comprises: reacting a dicarboxylic acid and an aliphatic diol to produce a polyester polyol; and reacting the polyester polyol and a polyisocyanate compound, wherein the dicarboxylic acid contains at least one component derived from biomass resources, a content of an organic acid in the dicarboxylic acid is more than 0 ppm and not more than 1,000 ppm relative to the dicarboxylic acid, and a pKa value of the organic acid at 25°C is not more than 3.7.