US Patent Issued to NOVA Chemicals (International) on June 2 for "High crystallinity ethylene-vinylcyclohexane copolymers" (Canadian Inventors)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,966, issued on June 2, was assigned to NOVA Chemicals (International) S.A. (Fribourg, Switzerland).

"High 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 is carried out with a catalyst system comprising a bridged hafnocene. When relatively low levels of vinylcyclohexane are incorporated, the ethylene-vinylcyclohexane copolymers have high degrees of crystallinity as measured by differential scanning calorimetry (Xc in %). These copol...