发明名称 |
Polyethylene pipe having better melt processibility and high resistance to stress and method of preparing the same using metallocene catalyst |
摘要 |
An ethylene-based copolymer for non-crosslinked water supply pipe is provided. The ethylene-based copolymer is prepared using a supported hybrid metallocene catalyst and has a dimodal or broad molecular weight distribution. The ethylene-based copolymer has a high density molecular structure in a low molecular weight and has a low density molecular structure with high content of a comonomer in a high molecular weight. The ethylene-based copolymer has a molecular weight distribution of 5-30 and the distribution of copolymerization of ethylene and C<SUB>3-20 </SUB>alpha-olefin is localized in high molecular weight chains. Accordingly, the ethylene-based copolymer has superior processability, internal pressure creep resistance at high temperatures and environmental stress crack resistance.
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申请公布号 |
US7304118(B2) |
申请公布日期 |
2007.12.04 |
申请号 |
US20050100659 |
申请日期 |
2005.04.07 |
申请人 |
LG CHEM, LTD. |
发明人 |
LEE KI SOO;LEE CHOONG HOON;LEE SANGWOO;LEE EUNJUNG;LEE SOOJEONG;CHOI SEUNGWOO |
分类号 |
C08F4/6592;C08F210/02;C08F4/659;C08F8/00;C08F10/00;C08F10/02;C08F210/16 |
主分类号 |
C08F4/6592 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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