Anti-sagging single-ingredient polyurethane waterproof paint and preparation method thereof

The invention relates to anti-sagging single-ingredient polyurethane waterproof paint and a preparation method thereof. An anti-sagging agent of the polyurethane waterproof paint is hyperbranched polyurea formed by hyperbranched polyethyleneimine and monoisocyanate terminated prepolymers through reaction, wherein the number of nitrogen atoms contained in the molecular structure of the hyperbranched polyethyleneimine is 10 to 30; the monoisocyanate terminated prepolymers are obtained through reaction of diisocyanate monomers and monohydric alcohol with the carbon atom number being 3 to 12. The anti-sagging single-ingredient polyurethane waterproof paint has the advantages that a production process is simple; the production efficiency is high; the construction is convenient; the sagging problem of single-ingredient polyurethane products is solved. 本发明涉及种抗流挂单组份聚氨酯防水涂料及其制备方法，聚氨酯防水涂料的抗流挂剂为超支化聚乙烯亚胺与单异氰酸酯封端预聚体反应形成的超支化聚脲，其中超支化聚乙烯亚胺的分子结构中含有的氮原子数为10~30，所述单异氰酸酯封端预聚体由二异氰酸酯单体与碳原子数为3~12的元醇反应得到。本发明的抗流挂单组份聚氨酯防水涂料的生产工艺简单，生产效率