ALEXANDRIA, Va., June 19 -- United States Patent no. 12,331,227, issued on June 17, was assigned to Covestro Deutschland AG (Leverkusen, Germany).
"Solvent-borne polyurethane adhesives with high molecular weight, high OH content and low solution viscosity" was invented by Dirk Achten (Leverkusen, Germany), Fabian Schuster (Leverkusen, Germany), Ann-Christin Bijlard-Jung (Rosrath, Germany) and Joerg Tillack (Solingen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An adhesive composition includes a polyurethane polymer, a solvent and a co-solvent. The polyurethane polymer is an internally and/or externally hydrophilized thermoplastic polyurethane having an Mw of less than=50000 g/mol. The solvent is a...