Maro Publications

Polyethylene Polymerization

Notes

Patent Abstracts

Patent Titles

From *09/16/2014 through 4/13/2013

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Polyethylene (PE)

Polymerization

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Patent Titles

11/5/2013

22. 8,575,410 
Process for oligomerizing dilute ethylene 

10/29/2013      

21. 8,569,434 
Ethylene copolymers, catalyst system and process for preparing the same 

10/22/2013      

20. 8,563,674 
Polyethylene and catalyst composition for its preparation 

19. 8,563,671 
Supported metallocene catalysts 

10/15/2013      

18. 8,557,931 
Multistage process for the polymerization of ethylene 

10/1/2013      

17. 8,546,496 
Process for preparing a bimodal polyethylene product in a single loop reactor 

9/17/2013      

16. 8,536,286 
Composite catalyst for production of polyethylene 

9/3/2013      

15. 8,524,845 
Catalyst composition and a process for the oligomerization of ethylene 

8/6/2013         

14. 8,501,884 
Polyethylene and catalyst composition and process for the preparation thereof 

13. 8,501,653 
Heat-treated Ziegler-Natta catalysts for ethylene polymerization 

7/30/2013      

12. 8,497,331 
Polymerisation of ethylene and alpha-olefins with pyrrol-iminophenol complexes 

7/9/2013      

11. 8,481,444 
Catalyst composition for oligomerization of ethylene oligomerization process and method for its preparation 

6/25/2013      

10. 8,470,939 
Preparation of polyethylene 

5/28/2013      

9. 8,450,510 
Amine bridged metallocene catalyst, method for preparing thereof and method for polymerizing ethylene-alpha olefin copolymer using amine bridged metallocene catalyst 

8. 8,450,438 
High temperature polyethylene solution polymerization process 

5/21/2013    

7. 8,445,607 
Process for the preparation of a particulate bimodal polyethylene product 

6. 8,445,599 
Multi-stage process for producing polyethylene with lowered gel formation   

5/7/2013  

5. 8,436,114 
Polyethylene and process for production thereof 

4. 8,436,113 
Ethylene alpha olefin polymer formed by use of metallocene catalyst 

4/30/2013  

3. 8,431,661 
Polyethylene and process for production thereof 

4/16/2013

2. 8,420,756 
Polymerisation of ethylene and alpha-olefins with catalyst systems based on binam derived ligands  

1. 8,420,754 
Production of polyethylene 

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Patent Abstracts

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Notes

Various polymerization methods produce polyethylenes with broad molecular weight distributions as well as blends such as post reactor melt blending, single stage polymerization with mixed catalysts and multistage polymerization.  These processes produce blends of linear polyethylene and resins with short chain branching.  However, none produce blends of polyethylene with long-chain branches.  Ciaccia et al developed a catalyst blend of positive Fe and Co catalysts with Ziegler polymerization catalysts, where the catalyst mixture has been annealed at 110 to 140 C.  Polymerization is carried out in a single reactor gas-phase where both catalysts are active resulting in blends including polyethylene with long chain branching and high molecular weights.
US Patent 8,759,460 (June 24, 2014), “Process for the Polymerization of Ethylene, and Ethylene Polymers having Broad Molecular Weight distribution and Long-Chain Branching,”  Eleonora Ciaccia, Iakovos Vittorias, Shahram Mihan, Lenka Lukesova, Dieter Lilge, Maclovio Herrera Salinas, Gerhardus Meier, and Gerd Mannebach (Bassell Polyolefine GmbH, Wesseling, Germany).

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Interested!!
Bookmark this page to follow future developments!.
(RDC 7/16/2012)

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2013 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 12/9/2013.