Catalyst system for the polymerization of olefins
AssigneeBasell Poliolefine Italia S.r.l.
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): 1 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
Claims19
An organometallic compound obtainable by contacting
- a) a compound having the following formula (I):
- 28
- 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 (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.
The organometallic compound according to claims 8 or 9 having formula (VIII):
- 33
- wherein
- the substituents R1 have the meaning described in claims 1 or 2 and the substituents R2′ and R5′ equal to or different from each other are C1-C20 alkyl.
A catalyst system for the polymerization of olefins comprising the product obtained by contacting
- (A) at least one transition metal organometallic compound, pirrolydil bis(η-cyclopentadienyl)methylzirconium being excluded and
- (B) an organometallic compound obtainable by contacting
- a) a Lewis base having the following formula (1):
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- 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 (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;
- and
- (C) optionally an alkylating agent.
Dependencies are inferred from the claim text.