[12] Patent
[11] Patent No.:GC0007605  
[45] Date of Publishing the Grant of the Patent: 30/Apr /2018                48/2018  
Number of the Decision to Grant the Patent:2018/126158
Date of the Decision to Grant the Patent:18/Apr/2018

[21] Application No.:GCC/P/2009/14801

[22] Filing Date:5/12/2009

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
25/11/2008
61/117,820

[72] Inventors:1- Linfeng Chen،2- Tak W. Leung،3- Tao Tao

[73] Owner: W.R,Grace & Co. Conn., 7500 Grace Drive , Columbia, Maryland 21044, USA

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: C07F 7/08, C08F 10/06, C08F 4/651, C08F 4/656 (2006.01)

[56] Cited Documents:

-WO 03068828 Al (CHINA PETROLEUMCHEMICAL, ET AL.21 August.2003
-WO 2005105858 Al (CHINA PETROLEUMCHEMICAL, ET AL.) 10 November.2005
-GB 630951 A (DOW CORNING)24October 1949
 
Examiner: Nouf AlNassban

[54] PROCATALYST COMPOSITION INCLUDING SILYL ESTER INTERNAL DONOR AND METHOD
[57] Abstract: The present disclosure provides silyl esters and silyl diol esters suitable as internal electron donors in procatalysts for polymer production. Disclosed are procatalyst compositions formed from a procatalyst precursor and an internal electron donor that is a silyl ester or a silyl diol ester. The procatalyst compositions can be used with a cocatalyst and optionally an external electron donor and/or an activity limiting agent to form a Ziegler-Natta catalyst composition. The present catalyst compositions exhibit high catalyst activity and form olefin-based polymers with broad molecular weight distribution, favorable flexural modulus, and high isotacticity.
No. of claims: 9


 

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