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:
Mar. 06, 2018
Filed:
Nov. 14, 2014
W. R. Grace & Co.-conn., Columbia, MD (US);
John K Kaarto, Missouri City, TX (US);
Jan W. Van Egmond, Charleston, WV (US);
Charles D. Lester, Fayetteville, WV (US);
W.R. Grace & Co.-Conn., Columbia, MD (US);
Abstract
The present disclosure provides a process for producing propylene-based polymer. The process includes contacting, under polymerization conditions in a gas phase polymerization reactor, propylene monomer and optionally one or more comonomers with a Ziegler-Natta catalyst composition. The process includes maintaining the temperature of a reaction zone of the reactor at a temperature from greater than 72° C. to less than or equal to 85° C., and forming a propylene-based polymer having a molecular weight (M) greater than 100,000, and a M/Mless than 2.20. The resultant propylene-based polymer is advantageous in fiber applications.