ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,687, issued on Jan. 13, was assigned to Urethane Systems USA LLC (Perth Amboy, N.J.).
"Low free polyurethane prepolymer composition" was invented by Ronald M. Emanuel Jr. (Morris, Conn.), Polina Ware (Southington, Conn.) and Gerald King (Waterside, Great Britain).
According to the abstract* released by the U.S. Patent & Trademark Office: "A polyurethane prepolymer composition may include more than 0 wt. % and less than 1.0 wt. % free diisocyanate monomer. The polyurethane prepolymer may include less than 80 wt. % of a 2:1 stoichiometric adduct of diisocyanate and at least one polyol (perfect prepolymer). Curable compositions may include such polyurethane prepolymer compositions a...