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US 2010/0168353 A1Published application
Propylene-Based Polymer, Articles, and Process for Producing Same
AssigneeDow Global Technologies LLC
InventorsWilliam G. Sheard, Linfeng Chen
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Abstract
Disclosed are propylene-based polymer compositions and processes for producing same. Polymerization with an improved catalyst composition provides a propylene-based polymer with improved stiffness.
Claims20
A polymerization process comprising:
- contacting, under polymerization conditions, propylene and optionally at least one other olefin with a catalyst composition comprising a substituted phenylene aromatic diester;
- and
- forming a propylene-based polymer with a flexural modulus greater than 260 kpsi as determined by ASTM D 790.
A composition comprising:
- a propylene homopolymer;
- and
- a substituted phenylene aromatic diester.
A composition comprising:
- a non-nucleated propylene homopolymer having a polydispersity index less than 6.0, a flexural modulus greater than 283 kpsi and a melt flow rate greater than or equal to 50 g/10 min as measured in accordance with ASTM D 1238 (230° C., 2.16 kg);
- and
- an oligomer content of less than 1800 ppmw.
Dependencies are inferred from the claim text.