Catalyst system for polypropylene copolymers
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United States of America Patent
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Nov 29, 2010
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May 22, 2007
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Abstract
Catalyst system comprising a. a procatalyst composition comprising a transition metal compound, a metal compound and an internal donor, and b. an external donor being an diethoxy-substituted silane, wherein c. said internal donor being chemically different to said external donor.
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