利用硅氢加成反应合成水溶性聚醚硅蜡

Preparation of water-soluble polyether-silicone wax by hydrosilylation

以不饱和聚醚和低含氢硅油为原料,氯铂酸为催化剂,利用硅氢加成反应合成聚醚硅蜡。研究了原料配比、催化剂用量、反应时间、反应温度对硅氢键转化率和产品性能的影响,确定最佳反应条件为:双键与硅氢键摩尔比n(C C)∶n(S—iH)=1.2∶1.0,烯丙醇聚氧烷基醚(F6)与烯丙基醇聚氧乙烯醚(APEG)的摩尔比n(F6)∶n(APEG)=2.5∶1.0,催化剂与双键摩尔比n(Pt)∶n(C C)=1.726∶106,反应温度115℃,反应时间7 h。并对合成产物进行了红外表征,结果表明聚醚已被接枝到聚硅氧烷主链上。

Polyether waxes are hydrosilylated from polyhydrosiloxane and polyether in the presence of chlorine platinum acid as catalyst. The effects of factors, such as molar ratio of reactants, dosage of the catalyst, reaction time and temperature on Si--H conversion rate and performance of products are investigated as well. The optimal experimental conditions are as follows ： the molar ratio of C =C to Si-H is 1.25： 1.00, the molar ratio of F6 to APEG is 2. 5 ： 1. 0, the molar ratio of Pt to C =C is 1. 726：106 ,reaction temperature is 115℃ ,reaction time is 7 hours. The structure of the product is determined by FT-IR and the results indicate that the polyether grafts in the chain of polysiloxane.