[EN] BROAD MOLECULAR WEIGHT DISTRIBUTION POLYPROPYLENE RESINS<br/>[FR] RÉSINES POLYPROPYLÈNE AYANT UNE LARGE DISTRIBUTION DES POIDS MOLÉCULAIRES
申请人:EXXONMOBIL CHEM PATENTS INC
公开号:WO2014070386A1
公开(公告)日:2014-05-08
Polypropylene resin comprising at least 50 mol% propylene, an MWD (Mw/Mn) of greater than 5, a branching index (g') of at least 0.95, and a melt strength of at least 20 cN determined using an extensional rheometer at 190°C. A catalyst system comprising a Ziegler-Natta catalyst comprising a non-aromatic internal electron donor, and first and second external electron donors comprising different organosilicon compounds, and a method to produce a polypropylene resin comprising contacting propylene monomers at propylene polymerization conditions with the catalyst system are also disclosed.