US Patent Issued to BOREALIS on June 30 for "Polyethylene pipe resin with high resistance to slow crack growth" (Austrian, Finnish Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,647, issued on June 30, was assigned to BOREALIS GMBH (Vienna).

"Polyethylene pipe resin with high resistance to slow crack growth" was invented by Andrey Buryak (Linz, Austria), Victor Sumerin (Kulloo, Finland), Franz Ruemer (Linz, Austria), Jari Aarila (Kulloo, Finland) and Joy Jie Cheng (Linz, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a polyethylene composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, and (B) a second ethylene-hexene-1 copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B) and wherein fraction (B) is pre...