US Patent Issued to Covestro Deutschland on Sept. 1 for "Producing isocyanate-terminated, urethane group-containing prepolymers" (German Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,723,123, issued on Sept. 1, was assigned to Covestro Deutschland AG (Leverkusen, Germany).

"Producing isocyanate-terminated, urethane group-containing prepolymers" was invented by Christoph Malbertz (Herzogenrath, Germany), Stefan Hirschfeld (Alpen, Germany), Dieter Mager (Leverkusen, Germany) and Oswald Wilmes (Cologne, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a method for producing isocyanate-terminated, urethane group-containing prepolymers, comprising reacting a reaction mixture that contains a stoichiometric excess of at least one aliphatic and/or cycloaliphatic diisocyanate and a polyol composition having an ...