叔碳酸乙烯酯改性苯丙乳胶的合成及其在水性防腐涂料中的应用  被引量:1

Synthesis of Styrene-acrylic Latex Modified by Vinyl Versatate and Its Application in Waterborne Anticorrosive Coatings

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作  者:朱晓亮 ZHU Xiao-liang(Zhuhai Zhanchen New Materials Co.,Ltd.,Guangdong Provincial Waterborne Polymer Coatings Materials Engineering and Technology Research Center,Zhuhai 519040,Guangdong,China)

机构地区:[1]珠海展辰新材料股份有限公司,广东省水性高分子涂层材料工程技术研究中心,广东珠海519040

出  处:《中国涂料》2021年第12期28-33,共6页China Coatings

基  金:珠海市科技创新局产学研合作项目(ZH22017001200023PWC)。

摘  要:探究了不同的乳液聚合方法和工艺、叔碳酸乙烯酯(VeoVa10)加入方式及其添加量对乳胶的单体转化率、聚合凝胶率、气味、吸水率、耐水性和耐碱性等性能的影响,并通过粒径测试对乳胶粒子核壳结构进行了分析,还讨论了所合成的VeoVa10改性苯丙乳胶的防腐机理。结果表明,利用乳胶粒子核壳结构设计技术,核预乳化液由全部的苯乙烯、少量丙烯酸酯类单体和交联单体组成,壳预乳化液主要由其他丙烯酸酯类单体和室温自交联单体组成,而将VeoVa10在滴加核、壳预乳化液之间单独一次性加入,其中VeoVa10以占其他单体总量质量分数的10%为宜,合成的VeoVa10改性苯丙乳胶聚合稳定性良好,粒径较小,核壳结构较理想。用该VeoVa10改性苯丙乳胶制备的水性单组分工业防腐涂料,不仅成本优势明显,且具有优良的附着力、硬度、抗冲击性能,以及耐水、耐酸碱、耐盐雾和耐候性能。The effects of different emulsion polymerization methods and processes,vinyl versatate(VeoVa10)adding methods and dosages on latex properties including the monomer conversion rate,polymerization gel rate,odor,water absorption,water resistance and alkali resistance were studied.The core-shell structure of latex particles was analyzed through the particle size test,and the anticorrosion mechanism of VeoVa10-modified styrene-acrylic latex was discussed.The results showed that VeoVa10-modified styrene-acrylic latex synthesized with latex particle core-shell structure design technology had good polymerization stability,small particle size and ideal core-shell structure.The pre-emulsion of the core was composed of styrene,a small amount of acrylate monomers and crosslinking monomers,and the pre-emulsion of the shell was mainly composed of other acrylate monomers and room temperature self-crosslinking monomers.VeoVa10 accounting for 10 wt.%of the total amount of other monomers was added between addition of the pre-emulsion of the core and addition of the pre-emulsion of the shell.Waterborne one-component industrial anticorrosive coatings prepared with such VeoVa10-modified styrene-acrylic latex not only have obvious cost advantages,but also have excellent adhesion,hardness,impact resistance,water resistance,acid and alkali resistance,salt spray resistance and weather resistance.

关 键 词:苯丙乳胶 叔碳酸乙烯酯 核壳结构 水性防腐涂料 

分 类 号:TQ630.4[化学工程—精细化工]

 

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