PVP在金属清洗用无磷脱脂剂中的应用研究

Research on Applications of PVP in Degreaser for Metal Cleaning

为了得到一种高效低泡的无磷脱脂剂配方,研究了将聚乙烯吡咯烷酮(PVP)与其它表面活性剂复配对无磷脱脂剂清洗性能的影响,结果表明:特殊表面活性剂PVP与非离子表面活性剂复配使体系表面张力降低,且脱脂效率大大提高。最优脱脂配方为:乙二胺四乙酸四钠3g/L、九水偏硅酸钠9g/L、碳酸钠6g/L、氢氧化钠9g/L、封端基改性聚醚CR61g/L、端羟基封头聚醚LW20 1g/L、PVP 1g/L、纯水余量。该脱脂剂高效环保,在温度为50℃时,脱脂效率高达99.82%。

The property of cleaning the smeary surface of metal phosphorus-free degreaser consists of polyvinylpyrrolidone（PVP）/nonionic surfactants was studied. The results show that PVP combined with nonionic surfactants has lower surface tension and high deoil rate. An environment friendly phosphorus-flee degreaser is obtained. The components of the degreaser： EDTA tetrasodium sah：3g/L , hydrous sodium silicate ：9g/L, sodium carbonate ：6g/L, sodium hydroxide ：9g/L, End-modified polyether CR6 ： 1g/L,LW20 ：primary hydroxyl end polyether lg/L, pure water： rest. The degreaser is high efficiency and litter pollution. The deoil rate can reach 99.82% at about 50℃.