ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,163, issued on June 17, was assigned to Wacker Chemie AG (Munich).
"Method for preparing polyorganosiloxanes" was invented by Shuai Tian (Shanghai), Huifeng Duan (Shanghai) and Heng Yang (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a method for preparing polyorganosiloxanes, comprising the following steps: a) reacting together a hydroxyl-terminated polysiloxane and a dialkoxysilane or an oligomer thereof in the presence of Catalyst 1, and b) reacting the product of Step a) with an endcapper in the presence of Catalyst 2 to form the polyorganosiloxane. According to this method, poly-organosiloxanes with a...