ALEXANDRIA, Va., Aug. 5 -- United States Patent no. 12,698,428, issued on Aug. 4, was assigned to Covestro Deutschland AG (Leverkusen, Germany).
"Latent reactive adhesive preparations" was invented by Joerg Buechner (Bergisch Gladbach, Germany), Hans-Josef Laas (Odenthal, Germany), Harald Kraus (Leverkusen, Germany) and Martin Melchiors (Leichlingen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to the use of solid polycarbodiimide resins having a softening temperature of less than+30deg C. as cross-linking agents for adhesive dispersions polymers. The mixtures from at least one solid polycarbodiimide resin and at least one polymer dispersion are suitable for producing storage ...