1
Qing Yang, Jeff F Greco, Max P McDaniel, Youlu Yu, Gary L Glass, Tony R Crain: Dual catalyst systems for producing polymers with a broad molecular weight distribution and a uniform short chain branch distribution. Chevron Phillips Chemical Company, Merchant & Gould P C, December 22, 2015: US09217049 (6 worldwide citation)

Disclosed herein are ethylene-based polymers having a melt index less than 50 g/10 min, a ratio of Mw/Mn from 4 to 20, a density from 0.90 to 0.945 g/cm3, and a substantially constant short chain branch distribution. These polymers can be produced using a dual catalyst system containing a boron brid ...


2
Jeff F Greco, Qing Yang, Vivek Rohatgi, Mark L Hlavinka, Jim B Askew: Polymers with improved ESCR for blow molding applications. Chevron Phillips Chemical Company, Merchant & Gould P C, November 15, 2016: US09493589 (1 worldwide citation)

Disclosed herein are ethylene-based polymers generally characterized by a density greater than 0.954 g/cm3, high load melt index ranging from 10 to 45 g/10 min, a ratio of high load melt index to melt index ranging from 175 to 600, a rheological slope parameter ranging from 0.15 to 0.30, and an ESCR ...


3
Qing Yang, Jeff F Greco, Max P McDaniel, Youlu Yu, Gary L Glass, Tony R Crain: Dual catalyst systems for producing polymers with a broad molecular weight distribution and a uniform short chain branch distribution. Chevron Phillips Chemical Company, Merchant & Gould P C, February 21, 2017: US09574031

Disclosed herein are ethylene-based polymers having a melt index less than 50 g/10 min, a ratio of Mw/Mn from 4 to 20, a density from 0.90 to 0.945 g/cm3, and a substantially constant short chain branch distribution. These polymers can be produced using a dual catalyst system containing a boron brid ...


4
Jeff F Greco, Qing Yang, Vivek Rohatgi, Mark L Hlavinka, Jim B Askew: Methods for controlling die swell in dual catalyst olefin polymerization systems. Chevron Phillips Chemical Company, Merchant & Gould P C, May 16, 2017: US09650459

Methods for controlling the die swell of an olefin polymer produced using a dual catalyst system are disclosed. The die swell of the olefin polymer can be increased or decreased as a function of the catalyst weight ratio and the reactant molar ratio used during the olefin polymerization process.