Broad molecular weight distribution polypropylene resins
US9453093B2 · kind B2 · utility
5Cited by
10References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 8, 2013 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Oct 8, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B1/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.