CATALYST SYSTEM FOR THE POLYMERIZATION OF OLEFINS
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United States of America Patent
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Aug 1, 2013
app pub date -
Oct 17, 2011
filing date -
Oct 19, 2010
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Abstract
A catalyst system comprising the product obtained by contacting (a) a solid catalyst component containing Mg, Ti, halogen and at least an electron donor compound selected from diolesters of a specific formula (b) an alkylaluminum cocatalyst and (c) an ester of formula R′OOC—(CR″2)m—COOR′ in which m is an integer from 2 to 8, the R′ groups, equal to or different from each other, are C1-C10 alkyl groups and the R″ groups, independently, are hydrogen or C1-C15 hydrocarbon groups.
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