Study on preparing the latexes composed of polyvinyl chloride-acrylate copolymers with core-shell structure for increasing water resistance of its coating

作     者：Wu, Yu Qi, Xinhui Zhang, Yue Wang, Shufen Ding, Yunsheng 

作者机构：Hefei Univ Technol Sch Mat Sci & Engn Hefei 230009 Anhui Peoples R China Hefei Univ Adv Funct Coating Addit R&D Ctr Sch Energy Mat & Chem Engn Hefei 230601 Anhui Peoples R China Hefei Univ Technol Sch Chem & Chem Engn Hefei 230009 Anhui Peoples R China Anhui Prov Key Lab Adv Funct Mat & Devices Hefei 230009 Anhui Peoples R China 

出 版 物：《PROGRESS IN ORGANIC COATINGS》 (Prog Org Coatings)

年 卷 期：2025年第200卷

核心收录：

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：Anhui Provincial Natural Science Foundation [2208085QE137] National Natural Science Foundation of China [U200120059] Major Science and Technology Projects of Anhui Province [2021e03020008, 202203c08020028] 

主　　题：Waterborne coatings Water resistance Polyvinyl chloride Acrylate Core-shell structure 

摘      要：The insufficient water resistance of waterborne coatings is an important factor limiting their applications. Herein, the latexes composed of polyvinyl chloride-acrylate copolymer (PVC-ACM) with a core-shell structure have been synthesized via seeded emulsion polymerization, and coupling agents were introduced into the polymerization to reinforce the core-shell interfacial bonding and increasing the water resistance of the PVC-ACM coatings. The effects of quantity, types of surfactants, and introducing way of coupling agent into seed emulsion polymerization on the performance of the latex and the water resistance of the PVC-ACM coatings were investigated. The results determined that latex particles composed of PVC-ACM copolymers exhibit a core-shell structure when the PVC content reaches 40 wt%, and the comprehensive performance of the latex reaches its optimum when a combined surfactant system consists of 2.5 wt% SR-10/CO-436 while the introduction amount of coupling agent KH570 is 2 wt%. Moreover, the water contact angle of coatings consisting of PVC-ACM latex reached 92.3 degrees, and the 24-h water absorption rate decreased to 2.4 %. This study presented a promising approach for developing the new waterborne coatings with superior water resistance.