Preparation method of oxalic acid polyester polyol and low-conductivity rigid polyurethane foam

The invention provides a preparation method of oxalic acid polyester polyol and rigid polyurethane foam. The raw materials of the polyurethane foam comprise a component A and a component B, the weight ratio of the component A to the component B is 1: (1.2-1.5), the component B is isocyanate, and the component A is combined polyether/polyester polyol including oxalic acid polyester polyol. The polyurethane combined polyether prepared by adopting the formula shows excellent thermal insulation performance and has stable mechanical strength. 本发明提供一种草酸聚酯多元醇及硬质聚氨酯泡沫的制备方法。聚氨酯泡沫的原料由A组分和B组分组成，两者重量比为1：1.2-1.5，B组分为异氰酸酯，A组分为组合聚醚/聚酯多元醇，包含草酸聚酯多元醇。采用该配方制得的聚氨酯组合聚醚表现出优异的保温性能，且具有稳定的力学强度。