三种超分散剂的制备与性能研究

Study on the Synthesis and Properties of Hyper-dispersants

以12-羟基硬脂酸、硬脂酸、聚乙烯亚胺为原料,合成了羧基封端及未封端聚羟基羧酸酯和聚乙烯亚胺接枝聚羟基羧酸酯,并将这三种超分散剂应用于低树脂液浓度的纳米二氧化钛颜料分散体系中,对分散体系的粘度、储存稳定性等进行了探讨。结果表明:用聚乙烯亚胺接枝的聚羟基羧酸酯对纳米二氧化钛颜料体系有较好的分散性能,最佳用量为4%(质量分数)。

Three kinds of hyper-dispersants were synthesized and used to improve the dispersion properties of nano-titanium dioxides in low concentration liquid resin system. The influences of hyper-dispersants on the viscosity and stability of the system were studied. It was found that polyethylene imine grafted hyper-dispersant had the best dispersion performance on nano-titanium dioxides dispersion system, and the optimal content was 4%.