The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 24, 2015
Filed:
May. 26, 2011
Siv Rundqvist, Värmlands Nysater, SE;
Mats Bäckman, Gothenburg, SE;
Borealis A.G., Vienna, AT;
Abstract
The present invention relates to a pipe consisting of a polyethylene composition which comprises—a base resin, comprising •a first ethylene homo- or copolymer (A): and •a second ethylene copolymer (B); and the polyethylene composition further comprises—a phenol-type stabilizer (C); and—a phenol-type stabilizer (D); whereby stabilizers (C) and (D) are different. The present invention is furthermore directed to the use of—a phenol-type stabilizer (C); and—a phenol-type stabilizer (D); whereby stabilizers (C) and (D) are different and, optionally,—a further stabilizer (E) selected from •phosphorous containing stabilizer (E1); •sulphur containing stabilizers (E2); •nitrogen containing stabilizers (E3); and/or •mixtures thereof; for increasing the slow crack growth resistance of pipes.