摘要： 采用喷雾干燥法制备可再分散聚合物乳胶粉。探讨了干燥室进口温度、喷雾液黏度、雾化轮转速及喷雾液进料速率对制备可再分散乳胶粉及其性能的影响,并用扫描电镜对乳胶粉进行表征。结果表明:进口温度为120～140℃、喷雾液黏度在15～20 s、雾化盘转速24 000 r/min、进料泵转速为30～35 r/min时,制备的乳胶粉流动性好、无结块,再分散性优良,满足制备乳胶粉的性能要求。

关键词: 可再分散乳胶粉, 喷雾干燥, SEM, 再分散性

Abstract: Redispersible polymer powders were prepared by spray drying. Influences of drying temperatures.The viscosity of atomization, rotational speed of atomization disc, and liquid feeding rate on properties of redispersible polymer powders were investigated. The powder was characterized by scanning electronic microscope (SEM). The experimental results showed that inlet temperature of 120-140 ℃, outlet temperature of 70-80 ℃, atomizing disc speed of 24 000 r/min and feeding pump speed of 30-35 r /min were chosen as the optimal process condition, giving a redispersible polymer powders with fine fluidity, superior redispersibility. Its properties meets the requirement of redispersible polymer powders.

Key words: redispersible polymer powders, spray drying, SEM, redispersibility