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:
Nov. 27, 2018
Filed:
Aug. 24, 2010
Harilaos Mavridis, Lebanon, OH (US);
Debra L. Beran, Cincinnati, OH (US);
Jeffrey R. Golden, Pearland, TX (US);
Joachim T. M. Pater, Ferrara, IT;
Giampiero Morini, Padua, IT;
Harilaos Mavridis, Lebanon, OH (US);
Debra L. Beran, Cincinnati, OH (US);
Jeffrey R. Golden, Pearland, TX (US);
Joachim T. M. Pater, Ferrara, IT;
Giampiero Morini, Padua, IT;
Equistar Chemicals, LP, Houston, TX (US);
Abstract
Disclosed is a process for making a linear low density polyethylene (LLDPE) having low gels. The process comprises copolymerizing ethylene with one or more Cα-olefins to produce an LLDPE resin which has a gel defect area less than 25 ppm. The copolymerization is performed in the presence of a Ziegler-Natta catalyst which comprises an MgClsupport, a Ti(IV) complex, and a cyclic ether as an internal electron donor. The Ziegler-Natta catalyst has an Mg/Ti molar ratio greater than or equal to 7.