Preparation method of vinyl-terminated methyl phenyl polysiloxane

The invention relates to a preparation method of vinyl-terminated methylphenyl polysiloxane, and the method comprises the following steps: adding 500 parts by mass of methylphenyl dimethoxysilane and400-500 parts by mass of deionized water into a reactor, adding 2.5-5 parts by mass of halloysite nanotube supported catalyst while stirring, heating to 70-80 DEG C, reacting for 2 hours, and collecting the distillate by using a condenser; after the reaction is finished, regulating the pressure of the system to -0.096 Mpa, carrying out reduced pressure distillation to remove water and low-boiling-point substances to obtain a colorless transparent hydroxyl-terminated methyl phenyl siloxane oligomer intermediate, adding 30-50 parts of tetramethyl divinyl disiloxane, introducing nitrogen for protection, carrying out stirring reaction for 3-5 hours under the condition that the reaction temperature is 80-85 DEG C, and after the reaction is finished, filtering and recovering the loess nanotube supported catalyst, adjust