ALEXANDRIA, Va., May 26 -- United States Patent no. 12,637,535, issued on May 26, was assigned to Covestro Deutschland AG (Leverkusen, Germany).
"Non-ionic hydrophilized polyisocyanates having a very low monomer content" was invented by Hans-Josef Laas (Odenthal, Germany), Claudine Stoye (Cologne, Germany) and Patrick Franke (Reichshof Heischeid, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a process for producing hydrophilically modified polyisocyanates having a very low content of monomeric diisocyanates, to the polyisocyanates obtainable or obtained by said process and to the use thereof for producing polyurethane plastics. The invention further relates to coating compos...