Low-refractive-index moisture-curable organosilicon conformal coating as well as preparation method and application of low-refractive-index moisture-curable organosilicon conformal coating

The invention belongs to the field of organic silicon rubber conformal coating, and particularly relates to low-refractive-index moisture-curing type organic silicon conformal coating as well as a preparation method and application of the low-refractive-index moisture-curing type organic silicon conformal coating. According to the invention, hydroxyl silicone oil with small molecular weight is used as a raw material, hydroxyl condensation reaction is carried out under the condition of a basic catalyst to obtain hydroxyl silicone oil with large molecular weight, and then hydroxyl-terminated polysiloxane and alkoxy silane used as an end-capping reagent are subjected to dealcoholization condensation reaction by adopting a condensation reaction method to synthesize alkoxy-terminated polysiloxane. Through the steps, the reaction activity of the conformal coating can be reduced, the phenomenon of skinning or gelling of the conformal coating taking hydroxyl silicone oil as a basic polymer in the placement process is