聚醚接枝聚硅氧烷的合成及其在金属清洗剂中的应用

Synthesis of Polyether-grafted Polysiloxanes and Its Application in Metal Cleanser

在微波条件下,通过硅氢反应合成聚醚接枝聚硅氧烷。考察了各因素对反应的影响,确定了最佳合成条件为:微波功率600 W,聚氧乙烯聚氧丙烯醚醋酸酯与含氢硅油的摩尔比为1.2∶1,氯铂酸催化剂(以Pt质量计)添加量为每kg反应体系加入10 mg,反应时间40 min,在该条件下,平均转化率为94.7%。利用红外光谱和核磁共振氢谱对其结构进行了表征。以合成的聚醚接枝聚硅氧烷为原料制备了消泡剂,并应用于金属清洗剂中,结果表明,制备的消泡剂在该体系中性能稳定、抑泡效果良好,添加消泡剂后的金属清洗剂的洗涤效果良好。

Polyether-grafted polysiloxanes was synthesized under microwave irradiation from methyl hydrogen silicone polyoxyethylene polyoxypropylene acetate. The optimum reaction conditions were ascertained as follows：radiation power of 600 W,the molar ratio of polyether to silicone of 1.2：1 ,amount of chloroplatinic acid catalyst 10 mg/kg（ calculate by Pt） and 40 rain microwave irradiation. Under the optimum conditions,the average conversion ratio was 94. 7%. The structure of the sample was analyzed and characterized by method of FTIR and 1HNMR. Polyether-grafted polysiloxanes was used to produce antifoaming agent and applied in metal cleanser. The results show that the antifoaming agent demonstrates superior antifoaming performance and washing effect with better stability.