US Patent Issued to BOREALIS on June 30 for "Polyolefin pipe resin with very good sagging and slow crack growth resistance" (Austrian, Finnish Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,689, issued on June 30, was assigned to BOREALIS GMBH (Vienna).

"Polyolefin pipe resin with very good sagging and slow crack growth resistance" was invented by Qizheng Dou (Linz, Austria), Victor Sumerin (Kulloo, Finland), Elena Pomakhina (Linz, Austria) and Jari Aarila (Kulloo, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a polyethylene (PE) composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, wherein fraction (A) has melt flow rate, MFR2, from 100 to 600 g/10 min; and (B) a second ethylene-1-hexene copolymer fraction, wherein fraction (A) has a lower molecular weig...