水性光油用软硬硅丙复合乳液的制备及耐高温性能  

Preparation and high temperature resistance of soft and hard silicon acrylic composite emulsion for water-based varnish

作　　者：郑熙熙 费贵强 段仪豪 郑咏佳 王志东 白阳 ZHENG Xixi;FEI Guiqiang;DUAN Yihao;ZHENG Yongjia;WANG Zhidong;BAI Yang(College of Chemistry and Chemical Engineering,Shaanxi University of Science and Technology,Xi'an 710021,Shaanxi,China;Shaanxi Key Laboratory of Chemical Additives for Industry,Xi'an 710021,Shaanxi,China)

机构地区：[1]陕西科技大学化学化工学院,陕西西安710021 [2]陕西省轻化工助剂重点实验室,陕西西安710021

出　　处：《精细化工》2025年第2期439-448,共10页Fine Chemicals

基　　金：国家自然科学基金项目(22078189);陕西省教育厅产业化项目(19jC010);陕西省特支计划——科技创新人才项目;陕西省重点研发项目(2020GY-243)。

摘　　要：以丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)分别为软、硬单体,通过调整BA和MMA比例制备了具有不同玻璃化转变温度(T_(g))的低T_(g)、高T_(g)丙烯酸酯乳液,以γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)为交联单体改性丙烯酸酯乳液制备了低T_(g)、高T_(g)硅丙乳液,进一步采用软、硬乳液复配的方式制备了复配乳液,最后将低T_(g)、高T_(g)硅丙乳液和复配乳液作为水性光油连结料制备了水性光油。采用SEM、TGA、DSC、拉伸实验等考察了KH570含量(以混合单体质量为基准,下同)对软、硬硅丙乳液及水性光油性能的影响。结果表明,KH570含量为3%制备的低T_(g)硅丙乳液(dSiPA-3)的平均粒径为116.5 nm,最低成膜温度(MFT)为16.6℃,乳胶膜的水接触角为68.6°,T_(g)为14.25℃,水性光油耐水次数高达50次,涂层附着力为0级,耐高温抗黏连可达到150℃;dSiPA-3与高T_(g)硅丙乳液(gSiPA-3)以质量比0.8∶1复配时,复配乳液的MFT为33.8℃,乳胶膜的T_(g)为14.19和63.54℃,水接触角为77.9°,水性光油耐摩擦500次,耐水50次,耐高温抗黏连温度可达到210℃,涂层附着力0级。A series of acrylate emulsions with low glass transition temperatures(T_(g))and high T_(g)were prepared by adjusting the ratio of soft monomer butyl acrylate(BA)to hard monomer methyl methacrylate(MMA),and then modified by cross-linking monomerγ-methacryloyloxypropyltrimethoxysilane(KH570)to synthesize low T_(g)and high T_(g)silicon-acrylic emulsions.The compound emulsion was further prepared via combination of soft and hard emulsions.Finally,the water-based varnish was obtained from low T_(g),high T_(g)silicon-acrylic emulsions and compound emulsion.The effects of KH570 content(based on the mass of mixed monomers,the same below)on the properties of soft and hard silicone acrylic emulsion and water-based varnish were analyzed by SEM,TGA,DSC and tensile tests.The results showed that the low T_(g)silicon-acrylic emulsion(dSiPA-3)prepared with 3%KH570 had an average particle size of 116.5 nm,the minimum film-forming temperature(MFT)of 16.6℃,with the water contact angle of the latex film 68.6°,T_(g)=14.25℃,the water resistance of water-based varnish up to 50 times,the coating adhesion as grade 0,and the high temperature and anti-adhesion resistance reaching 150℃When dSiPA-3 was mixed with gSiPA-3 at a mass ratio of 0.8∶1,the mixed emulsion exhibited a MFT of 33.8℃,and the latex film showed T_(g)of 14.19 and 63.54℃,with a water contact angle of 77.9°,and the water-based varnish was resistant to friction for 500 times and water for 50 times,with high temperature resistance and anti-adhesion temperature of 210℃,and coating adhesion level 0.

关 键 词：丙烯酸乳液 硅烷偶联剂 改性 乳液复配 水性光油 

分 类 号：TQ628.5[化学工程—精细化工] TS802[轻工技术与工程]