水性含氟羟基丙烯酸二级分散体的制备及性能研究  

Preparation and Properties of Aqueous Fluorinated Hydroxylic Acrylic Resin Secondary Dispersion

作　　者：莫旺奇 冯德臣 刘文浩 舒金兵 申亮 Mo Wangqi;Feng Dechen;Liu Wenhao;Shu Jinbing;Shen Liang(The Department of Coatings and Polymeric Materials,College of Chemistry and Chemical Engineering,Jiangxi Science&Technology Normal University,Nanchang 330013,China;Jiangxi Provincial Engineering Research Center for Waterborne Coatings,Nanchang 330013,China)

机构地区：[1]江西科技师范大学化学化工学院涂料与高分子系,南昌330013 [2]江西省水性涂料工程研究中心,南昌330013

出　　处：《涂料工业》2023年第7期27-33,41,共8页Paint & Coatings Industry

摘　　要：通过两层法聚合工艺,将含氟丙烯酸单体引入常规羟基丙烯酸分散体树脂的合成中,制备出高光泽、高耐性的水性含氟羟基丙烯酸二级分散体(FHAD)。研究了含氟丙烯酸单体种类及用量对FHAD性能的影响,结果表明:当添加8%甲基丙烯酸六氟丁酯(HFBMA)时,制得的分散体粒径小、黏度适中且热贮存稳定性优异。将该分散体与水性异氰酸酯固化剂AQUAPU-298搭配制备水性双组分聚氨酯涂料,固化后的漆膜具有优异的光泽,20°、60°、85°光泽分别为83.6、93.9、99.5;同时耐水性、耐酸、耐碱性也显著提高,有效改善了常规丙烯酸二级分散体的性能。In this paper,through the two-step polymerization process,fluorinated acrylic acid monomer was added into the synthesis of conventional hydroxyl acrylic acid resin dispersion,the high gloss and high endurance aqueous fluorinated hydroxyl acrylic acid secondary dispersion(FHAD)was successfully prepared.The effects of the type and content of fluorinated acrylic acid monomer on the properties of FHAD were investigated.The experimental results showed that when hexafluorobutyl methacrylate(HFBMA)was added and the content was 8%,the dispersion owned small particle size,moderate viscosity and excellent heat storage stability.Meanwhile,the two-component coatings prepared with the dispersion and water-based isocyanate curing agent AQUAPU-298 owned the excellent gloss.The gloss of 20°,60°and 85°was 83.6,93.9 and 99.5 respectively.What’s more,the acid and alkali resistance of films had been greatly improved and the water resistance(25℃)could achieve 312 hours,significantly improved the endurance of conventional acrylic dispersion.

关 键 词：羟基丙烯酸分散体 含氟丙烯酸 光泽 耐水性 

分 类 号：TQ637.81[化学工程—精细化工]