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.
本发明提供了一种用于获得环保型聚
氨酯的新型聚酯多元醇,该聚酯多元醇在聚
氨酯反应中易于控制,并且在聚
氨酯中具有优异的弹性和弹性模量,同时保持了由聚酯多元醇衍生的聚
氨酯所具有的耐热性、耐候性和耐
水性;还提供了一种使用该新型聚酯多元醇的聚
氨酯。本发明涉及一种生产
生物质衍生聚
氨酯的方法,该方法包括使二
羧酸和脂肪族二元醇反应生成聚酯多元醇;以及使聚酯多元醇和多
异氰酸酯化合物反应,其中二
羧酸含有至少一种从
生物质资源中提取的成分,二
羧酸中有机酸的含量相对于二
羧酸大于 0 ppm 且不大于 1,000 ppm,有机酸在 25°C 时的 pKa 值不大于 3。7.