水性涂料用苯丙树脂的制备及胶膜性能  

Preparation of a Styrene-acrylic Emulsion for Waterborne Paint and Its Film Properties

作　　者：成航航 沈一丁[1] 马国艳 杨凯 侯旭明 CHENG Hang-hang;SHEN Yi-ding;MA Guo-yan;YANG Kai;HOU Xu-ming(Shaanxi Key Laboratory of Chemical Additives for Industry,Shaanxi University of Science&Technology,Xi'an 710021,Shaanxi,China;College of Chemistry&Chemical Engineering,Xi'an Shiyou University,Xi'an 710065,Shaanxi,China)

机构地区：[1]陕西科技大学陕西省轻化工助剂重点实验室,陕西西安710021 [2]西安石油大学化学化工学院,陕西西安710065

出　　处：《精细化工》2019年第11期2302-2308,共7页Fine Chemicals

基　　金：陕西省教育厅重点实验室科研计划项目（2010JS058)

摘　　要：以甲基丙烯酸(MAA)为亲水单体、甲基丙烯酸羟丙酯(HPMA)为交联单体,与苯乙烯(St)、甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)等通过半连续及转相乳液聚合法,制备了具有核壳结构的水性苯丙水分散体乳液,进一步将乳液制备成苯丙树脂胶膜。探讨了MAA核壳质量比,MAA、St、HPMA等单体用量对水性苯丙树脂水分散体乳液性能及胶膜性能的影响,并利用傅里叶变换红外光谱仪(FTIR)及热失重分析仪(TGA)对苯丙树脂胶膜的结构及热稳定性进行了表征,利用激光粒径散射仪(DLS)及透射电镜(TEM)对苯丙树脂乳液乳胶粒的大小及形貌进行了表征。结果表明:当MAA在核壳中分配质量比为2∶8、MAA用量为7%(以单体总质量为基准,下同)、HPMA用量为10%、St与MMA质量比为3∶1时,得到共聚物乳液的粒径为259.65 nm,黏度为349.1 mPa?s,胶膜耐水时间为90 h,硬度为72.4?,拉伸强度为1.422 MPa,断裂伸长率为59.355%;水性苯丙水分散体附着力为1级。A waterborne styrene-acrylic dispersion emulsion with core-shell structure was prepared by semi-continuous solution and phase inversion emulsion polymerization using methacrylic acid(MAA) as hydrophilic monomer, hydroxypropyl methacrylate(HPMA) as crosslinking monomer, styrene(St), methyl methacrylate(MMA) and butyl acrylate(BA) as monomers. Subsequently, the styrene-acrylic emulsion film was further prepared. The effects of the MAA core-shell mass ratio, the amount of monomers such as MAA, St and HPMA on the properties of waterborne styrene-acrylic dispersion emulsion and film were discussed. The structure and thermal stability of the emulsion film were characterized by FTIR and TGA. The size and morphology of the styrene-acrylic emulsion particles were characterized by DLS and TEM. The results showed that when the mass ratio of MAA in the core shell was 2∶8, the mass fraction of MAA was 7%(based on the mass of all monomers, the same below), the mass fraction of HPMA was 10%, and the mass ratio of St to MMA was 3∶1, the prepared copolymer emulsion had excellent properties, with a particle size of 259.65 nm, viscosity of 349.1 mPa?s, filming hardness of 72.4?, tensile strength of 1.422 MPa, and elongation at break 59.355%. The film water resistance time could approach 90 h, and the adhesion level was 1.

关 键 词：苯丙乳液 水性涂料 胶膜性能 核壳结构 建筑用化学品 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]