Preparation method of isocyanate alkoxy silane

The invention discloses a preparation method of isocyanate alkoxy silane, and belongs to the field of synthesis of silane coupling agents. The preparation method comprises the following steps: taking amino alkoxy silane and phosgene as reaction raw materials, and synthesizing isocyanate alkoxy silane in one step without using an acid-binding agent in a photochemical process. According to the invention, the problem of low yield of the existing method for preparing isocyanate alkoxy silane is solved, excessive phosgene and solvent can be recycled, and the utilization efficiency of phosgene is improved. 本发明公开了一种异氰酸酯基烷氧基硅烷的制备方法，此方法为硅烷偶联剂合成领域。其制备方法包括如下步骤：以氨基烷氧基硅烷与光气为反应原料，光化过程中无需使用缚酸剂，一步合成异氰酸酯基烷氧基硅烷。本发明解决了现有制备异氰酸酯基烷氧基硅烷方法收率低的问题，过量的光气及溶剂均可回收利用，提高了光气的利用效率。