| 发明名称 | 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. | ||
| 申请公布号 | US8962116(B2) | 申请公布日期 | 2015.02.24 |
| 申请号 | US201113513908 | 申请日期 | 2011.05.26 |
| 申请人 | Borealis A.G. | 发明人 | Bäckman Mats |
| 分类号 | B29D22/00;B29D23/00;C08K5/13;C08L23/04;C08L23/06;C08L23/08;C08K5/134 | 主分类号 | B29D22/00 |
| 代理机构 | Fay Sharpe LLP | 代理人 | Fay Sharpe LLP |
| 主权项 | 1. A pipe consisting of a polyethylene composition which comprises a base resin, comprising a first ethylene homo- or copolymer (A); anda second ethylene copolymer (B);and the polyethylene composition further comprises a phenol-type stabilizer (C); anda phenol-type stabilizer (D);whereby stabilizers (C) and (D) are different,wherein components (C) and (D) differ in that component (C) contains at least one ester group and component (D) does not contain any ester group. | ||
| 地址 | Vienna AT | ||