PIPES MADE FROM A POLYETHYLENE COPOLYMER WITH SLOW CRACK GROWTH

摘要

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.