摘要
根据硅酸盐涂料的成膜机理,分析其耐水性差的主要原因,分别设计单因素试验和正交试验,探讨了硅酸盐基料体系、固化剂氟硅酸钠(Na2Si F6)含量、固化温度对涂层耐水性的影响规律,并运用扫描电镜对涂层的微观形貌进行表征。结果表明:涂层在室温下放置24 h后烘烤固化,表面无孔洞等缺陷产生;基料体系对涂层耐水性影响最大,其次依次为Na2Si F6含量和固化温度;当基料体系中硅酸钾与硅酸钠固含量之比(K/Na)为2、Na2Si F6含量为4%、固化温度为120℃时,所制备的硅酸盐涂层吸水率为7.0%,耐水时间达到30 d,涂层具备较好的耐水性。
The article analyzes the main reasons of silicate coatings＇ poor water resistance according to its film-forming mechanism, then discusses the effects of silicate binder system, Na2SiFs content and curing temperature on the water resistance of the coating via the single factor experiment and orthogonal experiment. Meanwhile, the microscopic morphology of the coating is also characterized by scanning electron microscopy （SEM）. The results show that the coating surface has no holes and other defects as stored at room temperature for 24 hours before baking curing, and the binder system is regarded as the most influential factor on water resistance of coating, followed by Na2SiF6 content and curing temperature. When K/Na is 2, NaESiF6 content is 4% and the curing temperature is 120 ℃, the water absorption rate of the prepared silicate coating is 7.0%, the water resistant time is 30 days and the coating has good water resistance.
出处
《涂料工业》
CAS
CSCD
北大核心
2017年第8期9-14,共6页
Paint & Coatings Industry
基金
重庆市研究生科研创新项目(CYS16238)
重庆市自然科学基金(CSTC2014jcyjA50026)
关键词
硅酸盐涂料
耐水性
基料体系
固化剂
固化温度
silicate coatings
water resistance
binder system
hardener
curing temper- ature
