自制水性聚氨酯乳液,并采用共混方法制备聚丙烯酸酯改性水性聚氨酯乳液。研究了共混改性涂膜的结构和性能,结果表明,聚丙烯酸酯共混改性水性聚氨酯乳液的涂膜性能比水性聚氨酯乳液涂膜性能有明显的提高。经过机械共混改性后,PU/PA膜的耐热性有了较大的提高,拉伸强度比PU膜大,而膜变硬、断裂伸长率大大降低。 Homemade aqueous polyurethane emulsion, and the use of blending method to prepare polyacrylate modified waterborne polyurethane emulsion. The structure and properties of the modified coating were studied. The results showed that the coating performance of the modified polyurethane aqueous emulsion was significantly higher than that of the aqueous polyurethane emulsion coating. After mechanical blending modification, PU / PA film has greatly improved heat resistance, tensile strength than the PU film, and the film hardens, the elongation at break is greatly reduced.