The invention relates to a preparation method of
ultraviolet-resistant and high-temperature-resistant
methyl silicone resin, relates to the preparation method of modified
methyl silicone resin, and is used for solving the problems that the existing
methyl silicone resin is poor in high temperature and
ultraviolet resistance, complicated in preparation method and high in cost. The preparation method comprises the following steps of:1, dispersing ethyl
orthosilicate in
anhydrous ethanol and then adding a mixing solution of deionized water, the
anhydrous ethanol and
ammonia, thereby obtaining a silica
ethanol solution; 2, dispersing tetrabutyl
titanate in the
anhydrous ethanol and then adding the mixing solution of the deionized water, the
anhydrous ethanol and
hydrochloric acid, thereby obtaining a titania ethanol solution; 3, dispersing methyl
triethoxysilane and diethoxydimethylsilane in the
anhydrous ethanol, thereby preparing a methyl
silicone resin
prepolymer; and 4, regulating the pH values of the solutions obtained in the steps 1 and 2 to be 7 and performing a refluxing operation after adding the
prepolymer, thereby obtaining the methyl
silicone resin. The method is conventional in
raw material preparation as well as simple and easy to implement. The thermal
weight loss rate of the modified methyl
silicone resin at the temperature of 300 DEG C is 0.6, so that the modified methyl
silicone resin is good in
ultraviolet resistance.