Maro Publications

Polyethylene (PE)

Patents with Abstracts

*5/16/2012

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Patents with Abstracts

2. 8,258,247 
Catalyst component for polymerization of ethylene and process for producing ethylene polymer (2

Kawashima  of Sumitomo Chemical Company, Limited, Japan, developed a catalyst for ethylene polymerization which can produce an ethylene polymer of high molecular weight with only ethyl branches. A catalyst consists of (A): a meso-metallocene compound, component (B): a compound which ionizes a metallocene compound to form an ionic complex, component (C): an organoaluminum compound, and component (D): an electron donating compound.  (RDC 9/22/2012)

1. 8,138,264 
Bimodal polyethylene resins that have high stiffness and high ESCR
 
Coffy, Guenther and Gray of Fina Technology, Texas  developed a bimodal polyethylene having a high density ranging from about 0.955 to about 0.959 g/cc, an improved environmental stress cracking resistance (ESCR) of from about 400 to about 2500 hours, and an improved 0.4% flexural modulus of from about 180,000 to about 260,000 psi (1,200 MPa to about 1,800 MPa) using a Ziegler-Natta polymerization catalyst using two reactors in series. The bimodal polyethylene may have a high load melt index (HLMI) of from about 2 and about 30 dg/min and may be optionally made with a small amount of alpha-olefinic comonomer in the second reactor. (RDC 5/16/2012)

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Roger D. Corneliussen
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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 5/16/2012.