乳胶粒子用附聚剂的制备及应用

采用丙烯酸(AA)、丙烯酸丁酯(BA)混合单体通过乳液聚合方法合成附聚剂,用于聚丁二烯胶乳(PBL)的附聚.研究了附聚时间、附聚剂组成、附聚剂加入量、附聚剂的粒子尺寸等因素对聚丁二烯(PB)胶乳粒径大小的影响.结果表明:附聚时间为40～60 min时,附聚过程基本完成；当BA/AA质量比为80/20时,附聚效果最好；附聚剂在PBL中加入量占PBL总质量的8.3％时,附聚效果明显；PBL平均粒径由原来的96nm附聚到了240～260 nm,粒径得到了明显的增长,合成的附聚剂有良好的附聚效果.

Synthesis and application of agglomeration agent to latex

The emulsion polymerization method was adopted tO prepare agglomeration agents with monomer mixture of acrylic acid（AA） and butyl acrylate（BA） for polybutadiene latex（PBL） agglom- eration. The influence of agglomeration time, the composition of agglomeration agent, the amount of agglomerating agent and the particle size of agglomeration agent on the polybutadiene latex particle size were studied ~ The result showed that agglomeration time should not be too long, 40-60 minutes will be able to complete; when BA/AA is 80/20, agglomeration agent added to the PBL accounts for 8. 3% of the total PBL mass, the agglomeration effect is obvious, polybutadiene latex of average parti- cle size increased from 96 nm to 240-260 nm, particle size has been a marked growth. The synthetic agglomeration agent has a good effect.