Method for preparing high-toughness high-resilience soft foam polyether polyol based on epoxybutane

The invention relates to a method for synthesizing high-toughness high-resilience soft foam polyether polyol, in particular to a method for synthesizing epoxybutane serving as a comonomer. According to the invention, glycerol is taken as an initiator, epoxybutane (BO), epoxypropane (PO) and ethylene oxide (EO) are taken as comonomers, the polyether polyol for the high-resilience soft foam is synthesized in a block copolymerization manner, and when the polyether polyol is applied to the polyurethane soft foam, the physical performance index tear strength can reach about 2.30 N/m, the elongation at break can reach about 110%, physical properties such as tear strength and elongation at break of foam can be remarkably improved, and the method can be used for industrial production of the high-resilience soft foam polyether polyol. 本发明涉及一种高韧性高回弹软泡聚醚多元醇的合成方法，特别涉及将环氧丁烷作为共聚单体的合成方法。本发明以甘油为起始剂，环氧丁烷(BO)、环氧丙烷(PO)、环氧乙烷(EO)为共聚单体，并以嵌段共聚的方式合成出高回弹软泡用聚醚多元醇，将该聚醚多元醇应用到聚氨酯软泡中，其物理性能指标撕裂强度可达到2.30N/m左右，断裂伸长率可达到110％左右，能够显著提高泡沫的撕裂强度、断裂