氨基聚醚改性有机硅的合成与消泡性能研究

Synthesis and Defoaming Properties of Amino Polyether-Modified Silicones from Hydrogen Silicone, Allyl Glycidyl Ether and Polyether Amines

摘要: 本文研究一类胺基和聚醚改性的聚硅氧烷表面活性剂的合成工艺，以及它们作为消泡剂时的消泡/抑泡性能。我们的合成路径分为两步：首先以端含氢硅油和烯丙基缩水甘油醚为原料在铂催化剂的作用下，利用硅氢加成反应合成了端环氧基改性硅油；然后，将上述环氧改性硅油和聚醚胺(M-600)进行亲核开环加成反应，制备最终的氨基聚醚改性的有机硅产品。消泡/抑泡性能测试结果表明：新方法制备的氨基聚醚有机硅产品具有良好的水分散性和一定的消泡抑泡性能。经过一定的复配之后，氨基聚醚有机硅消泡迅速，抑泡时间长，其性能已经达到甚至超过一些已经市场化的消泡剂产品。

Abstract: We report herein the synthesis and defoaming ability of one kind of modified silicones by employing poly-ether amine compound as the source of both amino and polyether motifs. The synthetic route starts with hydrogen sili-cone and consists of two major steps: hydrosilylation and ring-opening nucleophilic addition. Hydrosilylation reaction between methyl end-up hydrogen silicone and allyl glycidyl ether would get intermediate epoxy-modified silicones. Subsequently, the epoxy-modified silicones undergo further ring-opening nucleophilic addition reaction of the epoxy group with polyether amine (M-600) to deliver the desired amino polyether-containing silicone products. Initial de- foaming test of our products without any treatment showed good defoaming and foam-suppressing ability. After the treatment with other surfactants and necessary components, the defoaming and foam-suppressing ability becomes even better, which is superior to some commercialized antifoam products.