ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,421,434, issued on Sept. 23, was assigned to Covestro Deutschland AG (Leverkusen, Germany).
"Adhesives" was invented by Joerg Buechner (Bergisch Gladbach, Germany), Harald Kraus (Leverkusen, Germany), Thomas Fait (Cologne, Germany) and Wolfgang Arndt (Dormagen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to an aqueous dispersion containing at least one semicrystalline polyurethane-polyurea polymer and at least one surface-deactivated polyisocyanate. The melting temperature of the semicrystalline polyurethane-polyurea polymer is at least 55deg C. The disclosure also relates to a process for preparing the aqueous...