聚醚酯改性有机硅消泡剂的制备  

Preparation of Poly( ether-ester) Modified Silicone Defoaming Agent

作　　者：窦尹辰[1] 郭睿[1] 乔宇[1] 师丹娜 

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,陕西西安710021

出　　处：《精细化工》2014年第1期36-39,共4页Fine Chemicals

摘　　要：以含氢硅油、十四酸烯丙基聚醚酯为原料,氯铂酸为催化剂,合成了聚醚酯改性硅油,对其结构进行了红外和核磁表征。探讨了温度、时间和原料比对Si—H转化率的影响,测定了其水溶液在不同质量浓度下的表面张力,并将其制成消泡剂乳液研究了消泡性能。结果表明,在85℃、6 h、n(CC)∶n(Si—H)=1.3∶1时,Si—H转化率为87.6%;聚醚酯改性硅油水溶液在质量浓度0.3 g/L时表面张力为28.6 mN/m;配制的消泡剂乳液消泡时间5 s,抑泡高度300 mL。Poly （ether-ester） modified silicone oil was synthesized from tetradecanoic acid allyl polyether ester and low hydrogen silicone, using H2PtC16 as catalyst. The chemical structure was characterized by means of IR and 1HNMR. The effects of reaction temperature, time and the molar ratio of reactants on the hydrosilation reaction were investigated. The surface tension of poly （ether-ester） modified silicone solution at different mass concentration was determined. The defoaming performance of the defoamer emulsion was studied. The results show that when the reaction temperature was 85 ℃, reaction time was 6 h, and molar ratio of n （ C=C ） ： n （Si--H） was 1.30：1, the conversion rate of Si-H could reach 87.6%. The defoaming time of the emulsion was 5 s,and the bubble restrain height was 300 mL

关 键 词：十四酸 烯丙基聚醚 聚醚酯 改性硅油 消泡剂 表面活性剂 

分 类 号：TQ423.95[化学工程]