ALEXANDRIA, Va., May 19 -- United States Patent no. 12,630,658, issued on May 19, was assigned to NOVA Chemicals (International) S.A. (Fribourg, Switzerland).
"Low crystallinity ethylene-vinylcyclohexane copolymers" was invented by Xiaochuan Wang (Calgary, Canada), Peter Zoricak (Calgary, Canada) and Brian Molloy (Airdrie, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "The copolymerization of ethylene with vinylcyclohexane (VCH) is carried out with a catalyst system comprising a bridged hafnocene. High levels of vinylcyclohexane incorporation can be achieved affording ethylene-vinylcyclohexane copolymers having low degrees of crystallinity as measured by differential scanning calorimetry (Xc in %). Th...