Novel Catalyst Compositions and Methods of Making and Using Same (Chevron)
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Type
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Patent
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Inventor
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Mark
L. Hlavinka
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Inventor
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Guylaine
St Jean
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URL
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Free
Full Text Source: http://www.google.com/patents/US20140121344
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Assignee
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Chevron
Phillips Chemical Company Lp
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Patent
Number
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US20140121344
A1
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Issue
Date
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May
1, 2014
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Abstract
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An ethylene polymer having (i) a density defined by equation (1) ρ>a−b Log M (1) where ρ is a density of the polymer in g/cc, log M is a log weight average molecular weight of the polymer, a is about 1.0407, and b is about 0.0145; and (ii) a polydispersity index of greater than about 5. BACKGROUND The present disclosure generally relates to catalyst systems and polymer compositions. Particularly, the present disclosure relates to novel catalyst compositions for the production of high-density polymer compositions. FIELD Polyolefins are plastic materials useful for making a wide variety of valued products due to their combination of features such as stiffness, ductility, barrier properties, temperature resistance, optical properties, availability, and low cost. In particular, polyethylene (PE) is one of the largest volume polymers consumed in the world. It is a versatile polymer that offers high performance relative to other polymers and alternative materials such as glass or metal. An important PE product is piping. There exists an ongoing need for improved catalyst systems for the production of polymeric compositions. |
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