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:
Dec. 04, 2007
Filed:
Apr. 07, 2005
Ki Soo Lee, Daejeon, KR;
Choong Hoon Lee, Daejeon, KR;
Sangwoo Lee, Daejeon, KR;
Eunjung Lee, Daejeon, KR;
Soojeong Lee, Daejeon, KR;
Seungwoo Choi, Daejeon, KR;
Ki Soo Lee, Daejeon, KR;
Choong Hoon Lee, Daejeon, KR;
Sangwoo Lee, Daejeon, KR;
Eunjung Lee, Daejeon, KR;
Soojeong Lee, Daejeon, KR;
Seungwoo Choi, Daejeon, KR;
LG Chem, Ltd., , KR;
Abstract
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 Cα-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.