自增稠核壳型丙烯酸乳液的研制  

Preparation of Self-Thickening Polyacrylic Emulsion with Core-Shell Structure

作　　者：庄振宇[1,2] 许飞[1] 胡中[1] 陈卫东[1,2] 张汉青[1] 祝宝英[1,2] 朱柯[1,2] 

机构地区：[1]中海油常州涂料化工研究院有限公司,江苏常州213016 [2]中海油常州环保涂料有限公司,江苏常州213014

出　　处：《涂料工业》2015年第3期7-11,28,共6页Paint & Coatings Industry

摘　　要：采用预乳化工艺和半连续乳液聚合技术制备了一种具有自增稠效果的核壳型丙烯酸酯乳液。在所制备的乳液的壳层中引入羧基,中和后具有自增稠效果;在壳层中引入交联基团羟基,可与配漆时加入的氨基树脂反应,加入水性铝粉等组分就能得到烘烤型水性金属闪光涂料。分别研究了乳化剂的组成和用量、功能性单体甲基丙烯酸的加料方式和添加量等对乳液性能的影响;同时也探讨了体系p H对乳液增稠效果的影响。A novel core/shell polyacrylic emulsion was prepared by using pre-emulsifica- tion technology and semi-continuous seed emulsion polymerization technique. The functional groups such as carboxyl group and hydroxyl group were incorporated into the shell of the emul- sion particles, wherein, the carboxyl group could enable the emulsion to give self-thickening property and the crosslinkable hydroxyl group could react with the amino resin formulated therein. The aqueous heat-curable metallic coatings were prepared by mixing the prepared e- mulsion, aluminum flakes and amino resin. The effect of the composition and amount of emul- sifying agents, feeding mode and ratio of functional monomer （ i.e., methacrylic acid） on the properties of emulsions and the coatings thereof were investigated respectively. Moreover, the influence of pH of emulsion on thickening effect was also discussed.

关 键 词：水性金属闪光涂料 自增稠 核壳结构 乳液 耐水性 

分 类 号：TQ630.4[化学工程—精细化工]