Boric acid polyether polyol, preparation method and method for preparing polyurethane sealant by using boric acid polyether polyol

The invention provides a preparation method of boric acid polyether polyol, which is characterized in that boric acid or other alcohols are used as an initiator, boric acid is used as a catalyst to catalyze ring-opening polymerization of epoxide, and boric acid polyether polyol is prepared through reaction. The invention also relates to the boric acid polyether polyol and a method for preparing a polyurethane sealant by using the boric acid polyether polyol. According to the preparation method, boric acid is used as an initiator and a catalyst at the same time, the production cost is low, the synthesis process is simple, the technological process is short, and the prepared polyurethane sealant has a certain flame retardant effect. 本发明提供一种硼酸聚醚多元醇的制备方法，通过以硼酸或其他醇类为起始剂，以硼酸为催化剂催化环氧化物开环聚合，从而反应制得硼酸聚醚多元醇。本发明还涉及这种硼酸聚醚多元醇及用其制备聚氨酯密封胶的方法。本发明的制备方法，利用硼酸同时作为起始剂和催化剂，其生产成本低，合成过程简单，工艺流程短，其所制备的聚氨酯密封胶具有一定的阻燃效果。