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US 2018/0022843 A1Published application
Bimodal Propylene Polymers and Sequential Polymerization
AssigneeExxonMobil Chemical Patents Inc.
InventorsLubin Luo, Matthew W. Holtcamp, Gregory S. Day
Life of this patent
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Abstract
This invention relates to high porosity (≧15%) and/or low pore diameter (PD<165 μm) propylene polymers and propylene polymerization processes using single site catalyst systems with supports having high surface area (SA≧400 m2/g), low pore volume (PV≦2 mL/g), a specific mean pore diameter range (PD=1-20 nm), and high average particle size (PS≧30 μm).
Claims33
-22. (canceled)
A propylene polymer comprising:
- at least 50 mol % propylene;
- a 1% Secant flexural modulus of at least 1000 MPa, determined according to ASTM D 790 (A, 1.0 mm/min);
- more than 5 and less than 200 regio defects per 10,000 propylene units, determined by 13C NMR;
- a multimodal molecular weight distribution;
- if comonomer is present, a CDBI of 50% or more;
- and
- a matrix having a porosity of 15 percent or more, and median pore diameter less than 165 m, as determined by mercury intrusion porosimetry.
4 more elements
Dependencies are inferred from the claim text.