发明名称 |
Polyolefin resin blends for crack-resistant pipe |
摘要 |
Resin blends useful for pipe and blow-molded articles are disclosed. The blends comprise a low-molecular-weight, high-density polyethylene and a high-molecular-weight, low-density ethylene copolymer. The high-molecular-weight component is made with a bridged indenoindolyl Group 4 metal complex having open architecture. Blends of the invention uniquely have high molecular weight (Mw>200,000) and low levels of long-chain branching. A quick, convenient approach for estimating levels of long-chain branching in polyethylenes from gel permeation chromatography and dynamic oscillatory rheometry ("viscosity enhancement factor") is disclosed.
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申请公布号 |
US2009061135(A1) |
申请公布日期 |
2009.03.05 |
申请号 |
US20070897438 |
申请日期 |
2007.08.29 |
申请人 |
WANG SHAOTIAN;HLATKY GREGORY G;JOSEPH SEBASTIAN;MERRICK-MACK JEAN A;KLUG KENNETH J;YAU WALLACE W |
发明人 |
WANG SHAOTIAN;HLATKY GREGORY G.;JOSEPH SEBASTIAN;MERRICK-MACK JEAN A.;KLUG KENNETH J.;YAU WALLACE W. |
分类号 |
C08L23/06;B29D22/00;G01N11/00 |
主分类号 |
C08L23/06 |
代理机构 |
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