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:
May. 19, 2020
Filed:
Oct. 28, 2011
Applicants:
Lei Zhang, Port Lavaca, TX (US);
Yiqun Fang, Port Lavaca, TX (US);
Inventors:
Lei Zhang, Port Lavaca, TX (US);
Yiqun Fang, Port Lavaca, TX (US);
Assignee:
Formosa Plastics Corporation, USA, Livingston, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 10/02 (2006.01); C08F 4/44 (2006.01); C08F 10/00 (2006.01); C08F 4/58 (2006.01);
U.S. Cl.
CPC ...
C08F 10/00 (2013.01); C08F 4/58 (2013.01);
Abstract
Cyclic organosilicon compounds having a structure represented by the general formula and a method for using thereof as a component of catalysts for producing propylene polymer having a very high melt-flowability are disclosed. The cyclic organosilicon compounds are employed as external electron donors in Ziegler-Natta catalyst systems to dramatically improve the hydrogen response, and therefore the catalyst systems can be used to prepare polymer having high melt-flowability and high isotacticity at high yield.