液体古马隆改性双组分聚氨酯涂料的制备和性能

摘要

The liquid coumarone modified two-component polyurethane coating was prepared,among which the component A is the prepolymcr containing NCO groups and the component B is the curing agent containing mixed diamine and liquid coumarone.The effects of ratio of triol and diol,NCO group content,liquid coumarone amount etc.,on the film properties were discussed and the optimal formulation was obtained.The tensile strength is 2.5 MPa.the elongation at break is 750% and the solid content is over 99%,that can achieve the requirements,in standard GB/T 19250-2003.%制备了液体古马隆改性的双组分聚氨酯涂料,其中A组分为含-NCO的预聚物,B组分为含混合二元胺和液体古马隆的固化剂.分别讨论了三元醇和二元醇的比例、-NCO含量、液体古马隆添加量等对涂膜性能的影响,得到最优化的配方.胶膜强度为2.5 MPa,断裂伸长率为750％.涂料固含量大于99％,可以达到《GB/T 19250-2003聚氨酯防水涂料》规定的指标要求.