【摘要】 <正> 1,3,5-三甲基-1,1,3,5,5-五苯基三硅氧烷(1)含有较多苯基,其沸点较高(225℃/0.2mm),饱和蒸汽压低,热稳定性和抗氧化性能良好,可作为理想的高真空扩散泵油。更多还原

【Abstract】 1, 3, 5,-Trimethyl-1, 1, 3, 5, 5-pentaphenyltrisiloxane has been prepared by the equilibration of 1, 3-dimethyl-1, 1,3, 3,-tetraphenyldisiloxane and methylphenylcyclosiloxanes in the presence of tetramethyl ammonium silanolate.By the repeated recycling of the by-products siloxanes, it was possible to obtain an overall yield of over 90%.The physical properties and the oxidative stability of 1, 3, 5-trimethyl 1, 1, 3, 5, 5-pentaphenyltrisiloxane were also determined.更多还原