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US 8,106,138 B2Granted
Random propylene copolymer compositions, articles and process
AssigneeDow Global Technologies LLC
InventorsWilliam G. Sheard, Linfeng Chen, Daniel W. Baugh, III, Peter S. Martin
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Abstract
The present disclosure is directed to random propylene/α-olefin compositions, articles, and processes for producing the same. The present compositions contain a random copolymer of propylene and α-olefin. Polymerization with an improved catalyst composition increases the molecular weight distribution of the copolymer and increases the randomness of comonomer distribution to yield random propylene/α-olefin copolymers with improved stiffness and/or improved optical properties.
Claims3
A polymerization process comprising:
- contacting, under polymerization conditions, propylene and ethylene with a catalyst composition comprising a substituted phenylene aromatic diester;
- and
- forming a random propylene/ethylene copolymer with a Koening B-value from greater than or equal to 0.83 to about 1.0.
Dependencies are inferred from the claim text.