聚醚和含氟酯共改性苯基含氢硅油的制备及消泡性能

以10-十一烯酸四氟丙酯(UATE)、聚醚(F-6)和苯基含氢硅油为原料,氯铂酸为催化剂,经硅氢加成反应合成了长链含氟烷基酯与聚醚共改性苯基含氢硅油(UAPFPS)。通过FT-IR和1H NMR对UAPFPS的结构进行了表征,采用单因素试验对反应中各影响因素进行考察得到其较佳工艺参数为:反应温度110 ℃,反应时间5.5 h,n(Si-H) ∶n(C=C)=1∶1.2,n(F-6) ∶ n(UATE)=1∶1,催化剂用量20 μg/g(相对于每克反应物)。在此条件下Si-H键转化率为95.30%。将UAPFPS、硅膏、乳化剂和增稠剂复配制得改性有机硅消泡剂,其性能测试结果表明,该消泡剂具有较好的消泡性、抑泡性与稳定性。

Preparation and defoaming performance of phenyl hydrogen-containing silicone oil co-modified with polyether and fluorine-containing ester

10-Undecenoic acid tetrafluoropropyl ester( UATE), allyl polyether( F-6) and phenyl hydrogencontaining silicone oil were used as raw materials. Chloroplatinic acid was used as catalyst. The phenyl hydrogencontaining silicone oil co-modified with polyether and fluorine-containing ester( UAPFPS) was synthesized via hydrosilylation. The structure of UAPFPS was characterized by FT-IR and 1H NMR. The optimum parameters were obtained by single factor experiment: the reaction temperature was 110 ℃;the reaction time was 5.5 h;n(Si-H)∶n(C=C)=1∶1.2;n(F-6)∶n(UATE)=1∶1;the amount of catalyst is 20 μg/g( relative to each gram of reactant). Under this condition, the conversion of Si-H bonds was 95.30%. A modified silicone defoamer was prepared by compounding UAPFPS, silicone paste, emulsifiers and thickener. The results of performance test show that the defoamer has good defoaming properties, foam inhibition and stability.