ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,819, issued on Dec. 23, was assigned to NOVA Chemicals (International) S.A. (Fribourg, Switzerland).
"Fluoropolymer free polymer processing aids" was invented by Jared Taylor (Calgary, Canada), Tony Tikuisis (Calgary, Canada), P. Scott Chisholm (Calgary, Canada), Norman Aubee (Okotoks, Canada) and Douglas Checknita (Calgary, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A polymer processing aid (PPA) reduces melt defects in extruded polyolefins in the absence of fluoropolymers. The polymer processing aid comprises a polyalkylene glycol such as a polyethylene glycol together with a high pressure low density polyethylene (LDPE) and reduces mel...