ALEXANDRIA, Va., Jan. 28 -- United States Patent no. 12,534,564, issued on Jan. 27, was assigned to Evonik Operations GmbH (Essen, Germany).
"Production of rigid polyurethane foam" was invented by Martin Glos (Borken, Germany), Jobst Grimminger (Ellerau, Germany) and Michael Ferenz (Essen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "What are described are (a) a composition suitable for production of rigid polyurethane foam, comprising at least one isocyanate component, a polyol component, optionally a catalyst that catalyses the formation of a urethane or isocyanurate bond, optionally blowing agents, where the composition additionally comprises polyalkylsiloxane (PAS) containing no polyether modif...