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:
Jul. 05, 2016
Filed:
Dec. 02, 2011
Applicants:
Linfeng Chen, Missouri City, TX (US);
Tak W. Leung, Houston, TX (US);
Tao Tao, Houston, TX (US);
Inventors:
Assignee:
W. R. Grace & Co.-Conn., Columbia, MD (US);
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/76 (2006.01); C08F 4/52 (2006.01); C08F 110/06 (2006.01); C08F 10/00 (2006.01);
U.S. Cl.
CPC ...
C08F 4/76 (2013.01); C08F 4/52 (2013.01); C08F 10/00 (2013.01); C08F 110/06 (2013.01);
Abstract
Disclosed herein are catalyst compositions and polymers, i.e., propylene-based polymers, produced therefrom. The present catalyst compositions contain an internal electron donor of an alkoxyalkyl 2-propenoate and optionally a mixed external electron donor. The present catalyst compositions improve catalyst selectivity and polymer stiffness. Polypropylene homopolymer produced from the present catalyst composition has a xylene solubles content less than 4 wt % and a Tgreater than 172.0° C.