申请人:Dow Corning Corporation
公开号:US06680398B1
公开(公告)日:2004-01-20
In a first embodiment of a process for making mercaptoalkylalkoxysilanes, a pH adjusting agent and a sulfide containing compound are mixed in an aqueous phase to provide a pH of 4-9, a phase transfer catalyst is added to the aqueous phase, a haloalkylalkoxysilane is then added to the aqueous phase to form a reaction mixture containing mercaptoalkylalkoxysilanes and water soluble byproducts, and the desired mercaptoalklyalkoxysilanes are separated from the water soluble byproducts. In an alternate embodiment, the haloalkylalkoxysilane, the phase transfer catalyst, and an anhydrous pH adjusting agent such as sulfur dioxide, carbon dioxide, hydrogen sulfide, phosphoric acid, boric acid, and hydrochloric acid, are mixed, then an aqueous solution of a sulfide containing compound is added to form a reaction mixture containing mercaptoalkylalkoxysilanes and water soluble byproducts, and desired mercaptoalklyalkoxysilanes are separated from water soluble byproducts.
在制备巯基烷基烷氧基硅烷的过程的第一实施例中,将pH调节剂和含硫化物的化合物混合在水相中,以提供pH值为4-9,然后向水相中加入相转移催化剂,然后向水相中加入卤代烷基烷氧基硅烷,形成含有巯基烷基烷氧基硅烷和水溶性副产物的反应混合物,然后将所需的巯基烷基烷氧基硅烷与水溶性副产物分离。在另一实施例中,将卤代烷基烷氧基硅烷、相转移催化剂和无水pH调节剂(如二氧化硫、二氧化碳、硫化氢、磷酸、硼酸和盐酸)混合,然后加入含硫化物的化合物的水溶液,形成含有巯基烷基烷氧基硅烷和水溶性副产物的反应混合物,然后从水溶性副产物中分离所需的巯基烷基烷氧基硅烷。