梯度乳液聚合制备核壳结构丙烯酸酯乳液——合成工艺  

Study of Core-shell Structure Acrylate Emulsion Prepared by Gradual Emulsion Polymerization: Synthesis Technology

作　　者：张心亚[1] 孙志娟[1] 傅和青[1] 黄洪[1] 蓝仁华[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化工与能源学院化学工程研究所,广州510641

出　　处：《湖南师范大学自然科学学报》2006年第4期62-67,共6页Journal of Natural Science of Hunan Normal University

基　　金：广东省科技厅科技计划项目(2003B10506)

摘　　要：采用梯度种子乳液聚合方法,引入半连续单体滴加工艺和亲水性功能单体,制备了零VOC乳胶涂料专用的具有较高玻璃化温度(tg)、较低最低成膜温度(tMF)的核/壳结构的纯丙烯酸酯乳液.讨论了合成工艺、乳化剂种类和用量、亲水性功能单体及各阶段单体用量等因素对乳液结构及tMF的影响.实验结果表明采用梯度种子乳液聚合工艺和引入亲水性功能单体———甲基丙烯酸羟丙酯(HPMA)可有效地降低丙烯酸乳液的tMF(tMF<3℃),提高乳液的冻融稳定性和钙离子稳定性.Core-shell acrylate emulsion for zero VOC latex coatings with higher glass transition temperature（ ts） and lower minimal film-forming temperature （tMF） is prepared by Gradual seeded Emulsion Polymerization and introducing hydrophilic functional monomers. The main influence factors such as emulsion polymerization technology, emulsifier, hydrophilic functional monomers and different ration of core/shell monomer to core-shell structure and tMF of polymer particle are discussed. The experimental results show that typical core-shell structure acrylate emulsion with higher tg and lower tMF can be prepared by using gradual seeded emulsion polymerization. Hydrophilic functional monomer HPMA is effective to reduce the tMF of emulsion and enhance the thaw-freezing stability and electronic stability.

关 键 词：梯度乳液聚合 核壳结构乳液 最低成膜温度 玻璃化温度 

分 类 号：TQ630.1[化学工程—精细化工]