US Patent Issued to Henkel on April 15 for "High strength long open time polyurethane reactive hot melt" (Illinois Inventors)

ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,869, issued on April 15, was assigned to Henkel AG & Co. KGaA (Duesseldorf, Germany).

"High strength long open time polyurethane reactive hot melt" was invented by Yingjie Li (Elgin, Ill.), Shuhui Qin (Elgin, Ill.) and Jeanne Li (Elgin, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a moisture reactive hot melt adhesive composition prepared from a combination comprising a polyisocyanate, at least one polyether polyol polymer, an acrylic polymer, an inorganic filler and a polyester diol having a structure of Formula 1 or of Formula 2. Formula 1 is:H-[O(CH2)mOOC(CH2)nCO]k-O(CH2)m-OH; m and n are each an even integer; m+n=8; m and n ar...