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.
本发明涉及一种管道,其组成包括
一种聚
乙烯组合物,其中包括
- 基础
树脂,包括
- 第一种
乙烯均聚物或共聚物 (A)
- 第二种
乙烯共聚物 (B);
聚
乙烯组合物还包括
-
苯酚型稳定剂 (C);和
-
苯酚型稳定剂 (D);
其中稳定剂(C)和(D)是不同的。
本发明还涉及以下用途
-
苯酚型稳定剂 (C);和
-
苯酚型稳定剂(D);
其中稳定剂(C)和(D)是不同的
以及
- 另一种稳定剂(E),选自
含
磷稳定剂(E1);
含
硫稳定剂(E2);
含氮稳定剂(E3);和/或
它们的混合物;
用于提高管道的抗缓慢裂纹生长能力。