US Patent Issued to Evonik Operations on March 17 for "Increasing the molecular weight of low molecular weight alpha,omega-polysiloxanediols" (German Inventors)

ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,351, issued on March 17, was assigned to Evonik Operations GmbH (Essen, Germany).

"Increasing the molecular weight of low molecular weight alpha,omega-polysiloxanediols" was invented by Berend-Jan de Gans (Muelheim an der Ruhr, Germany), Philippe Favresse (Ratingen, Germany), Wilfried Knott (Essen, Germany), Horst Dudzik (Essen, Germany) and Monika Johannes (Essen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A process can be used for increasing the molecular weight of low molecular weight Alpha,Omega-polysiloxanediols. The process involves heating the low molecular weight Alpha,Omega-polysiloxanediols in the presence of acetic anhydride ...