食品罐用镀锡钢板的无机碱性脱漆剂研究

根据水解原理,以NaOH为主溶剂,CTMAB为表面活性剂,尿素为助溶剂,1,2-丙二醇为辅助添加剂,在恒温水浴条件下制备了一种针对食品罐用镀锡钢板的无机碱性脱漆剂。考察了主溶剂、表面活性剂、助溶剂及辅助添加剂的种类、用量以及温度对脱漆效率的影响,同时探讨了脱漆剂的理化性能、综合性能、挥发速率及腐蚀性。结果表明:当NaOH为5.0 g,CTMAB为0.3 g,尿素为0.6 g,1,2-丙二醇为0.2 g,在70~75℃时,所得脱漆剂的脱漆效果最高,挥发性和腐蚀性低,3~5 m in内可使镀锡钢板底色样板漆膜软化、脱落。

Study on Inorganic Alkaline Paint Stripper for Food-Can Tinplate

According to hydrolysis principle,an inorganic alkaline paint stripper was prepared in a constant temperature water bath,in which NaOH was used as the primary solvent,CTMAB as surfactant,urea as cosolvent,1,2-propanediol as auxiliaries.The effects of the type and amount of the primary solvent,surfactant,cosolvent and auxiliaries on the stripping efficiency were discussed,as well as the volatility,physicochemical properties and corrosion of paint stripper.The results showed that when NaOH was 5 g,CTMAB 0.3 g...