含氟水性聚氨酯-丙烯酸酯涂料的制备及其成膜强度和耐水性的研究  

Preparation of Fluorinated Waterborne Polyurethane-Acrylate Coatings and Its Film Strength and Water Resistance

作　　者：杨晨[1] 李小瑞[1] 李培枝[1] 王晨[1] 李海斌[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021

出　　处：《涂料工业》2013年第8期55-59,共5页Paint & Coatings Industry

基　　金：陕西省自然科学基金(2012JQ2005);陕西科技大学科研启动基金项目(BJ 12-08)

摘　　要：采用原位乳液聚合法,合成了含氟自交联型水性聚氨酯-丙烯酸酯(FPUA)乳液。研究了单体物质的量比、环氧基团含量和氟单体含量对乳液制备过程、乳液及涂膜性能的影响。通过红外光谱、热重分析对其结构和膜性能进行表征,并对涂膜表面的水接触角进行了研究。结果表明:n(—NCO)∶n(—OH)=1.4、n(—NHNH2)∶n(—CO—)=1、GMA用量为4%、含氟单体用量为6%时,合成乳液稳定性良好,涂膜的耐水性和热稳定性良好。在成膜时复合乳液中的氟基团向空气/聚合物界面伸展,有效地覆盖涂膜表面,降低涂膜表面能,水在涂膜上的接触角达到117.2°。Waterborne fluorinated polyurethane -acrylate compounded emulsion （FPUA） was synthesized by in situ emulsion polymerization. The influence of molar ratio of monomers, dosage of GMA and FM on the performance of the emulsion and its film performance were inves- tigated. FPUA was characterized by use of FT -IR, TG and contact angle measurement. The re- suits showed that when --NCO/--OH ratio was 1.4, --NHNH2/--CO__ ratio was 1.0, the dosage of GMA was 4. 0% and FIVI was 6. 0% of total monomer mass, the emulsion prepared provided good stability and the film indieated good water resistance and thermal stability. During the film formation, the fluorinated group stretched forward to the interface of the air/polymer, reducing the energy surface, the contact angle of the coating film was up to 117. 2°.

关 键 词：水性聚氨酯聚丙烯酸酯 含氟 自交联 防水性 涂膜硬度 

分 类 号：TQ637.81[化学工程—精细化工]