Catalyst system for the polymerization of olefins
AssigneeBasell Polyolefine GmbH
InventorsLuigi Resconi, Simona Guidotti
Life of this patent
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Abstract
An organometallic compound obtainable by contacting a) a compound having the following formula (I): wherein Ra, Rb, Rc and Rd equal to or different from each other are hydrocarbon groups b) a Lewis acid of formula (II) MtR13 (II) wherein Mt is a metal belonging to Group 13 of the Periodic Table of the Elements (IUPAC); R1, equal to or different from each other, are selected from the group consisting of halogen, halogenated C6-C20 aryl and halogenated C7-C20 alkylaryl groups; two R1 groups can also form with the metal Mt one condensed ring. These compounds are useful as cocatalysts for polymerizing olefins.
Claims10
An organometallic compound obtained by contacting
- a) a compound having following formula (I):
- wherein Ra, Rb, Rc and Rd, equal to or different from each other, are selected from the group consisting of hydrogen, halogen, linear or branched, saturated or unsaturated, C1-C10 alkyl, C6-C20 aryl, C7-C20 arylalkyl and C7-C20 alkylaryl groups, optionally containing O, S, N, P, Si or halogen atoms, or two or more adjacent substituents Ra, Rb, Rc and Rd form one or more C4-C7 rings, optionally containing O, S, N, P or Si atoms, that can bear substituents;
- with
- b) a Lewis acid of formula (II)
- MtR13 (II)
- wherein Mt is a metal belonging to Group 13 of the Periodic Table of the Elements;
- R1, equal to or different from each other, are selected from the group consisting of halogen, halogenated C6-C20 aryl and halogenated C7-C20 alkylaryl groups;
- two R1 groups optionally form with the metal Mt one condensed ring.
Dependencies are inferred from the claim text.