遮盖性空心乳液的制备及其在水性油墨中的应用

Preparation of hollow latex with good coverage and its application in water-based ink

摘要:

采用核壳乳液聚合法制备聚甲基丙烯酸甲酯（MMA）-甲基丙烯酸（MAA）-丙烯酸丁酯（BA）为亲水核，聚苯乙烯（St）-丙烯腈（AN）-二乙烯苯（DVB）为疏水硬壳的核壳型乳液，然后进行碱溶胀处理，制得具有中空结构的遮盖性空心乳液。详细研究了MAA用量、核壳比（核单体与壳单体的质量之比，下同）对空心乳液中空度及遮盖性的影响，并利用透射电镜（TEM）、扫描电镜（SEM）对空心乳液的结构形态进行了表征。结果表明，当核单体中MAA用量为核单体总量的30%（质量分数），核壳比为1:6时，乳胶粒的中空度约为50%，空心乳液遮盖性最强，应用于水性油墨中能够获得良好的综合性能。

Abstract:

The core-shell latex was synthesized with P(MMA-MAA-BA) as hydrophilic core and P(St-AN-DVB) as hydrophobic hard shell by core-shell emulsion polymerization process, and the covering latex with hollow structure was acquired by post-treatment with alkali. Elements such as MAA acount,core/shell ratio(mass ratio of core monomer and shell monomer, the same below) were traversed which effected hollowness and opacity ability of hollow latex. Structure and morphology of hollow latex particles were characterized by TEM and SEM. The results shown that, when MAA account was 30%(mass fraction) of core monomer and core/shell ratio was 1:6, the latex particles had around 50% hollowness and best opacity ability, and water-based ink therefrom could obtain the best overall performance.