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US 2002/0058765 A1Published application
Catalyst system for the polymerization of olefins
OwnerSigurd Becke, Uwe Denninger +4inventors
InventorsSigurd Becke, Uwe Denninger, Steffen Kahlert, Werner Obrecht, Claudia Schmid, Heike Windisch
Life of this patent
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Abstract
The present invention relates to a metal-free cyclopentadienide compound which, in conjunction with a metallocene, is able to form a catalyst system that can be used for the polymerization of olefins. It is thus possible to dispense with the use of methylaluminoxane (MAO) or boron-containing compounds as co-catalyst and nevertheless achieve a high degree of catalytic activity. The invention relates also to a process for the preparation of the metal-free cyclopentadienide compound and to the use thereof as a catalyst component in the preparation of polyolefins.
Claims18
A metal- and metalloid-free cyclopentadienide compound of the general formula (II)
- 6
- wherein
- Q+ represents either a Lewis-acid cation according to the Lewis acid-base theory, selected from the group consisting of carbonium, oxonium and sulfonium cations, or
- Q+ represents a Brönstedt-acid cation according to the Brönstedt acid-base theory,
- Y represents a (CR26)m group wherein m=from 0 to 4, wherein the radicals R6 may be identical or different and, when m=0, the ring may be closed or open, with the proviso that, when the ring is open, the free valences at the terminal carbon atoms are saturated by radicals R having the same meaning as R1-R6,
- R1-R6 represent identical or different substituents selected from the group consisting of hydrogen, phenyl, aryl, C1- to C20-alkyl, C1-C10-haloalkyl, C6-C10-haloaryl, C1- to C10-alkoxy, C6- to C20-aryl, C6- to C10-aryloxy, C2- to C10-alkenyl, C7- to C40-arylalkenyl, C2- to C10-alkynyl, silyl optionally substituted by C1-C10-hydrocarbon radicals, and amine substituted by C1- to C20-hydrocarbon radicals,
- with the proviso that at least one substituent is bulky.
4 more elements
A metal- and metalloid-free cyclopentadienide compound of the general formula (IIc)
- 8
- wherein
- Q+ represents either a Lewis-acid cation according to the Lewis acid-base theory selected from the group consisting of carbonium, oxonium and sulfonium cations, or
- Q+ represents a Brönstedt-acid cation according to the Brönstedt acid-base theory,
- R1-R5 represent identical or different substituents selected from the group consisting of hydrogen, phenyl, aryl, C1- to C20-alkyl, C1-C10-haloalkyl, C6-C10-haloaryl, C1- to C10-alkoxy, C6- to C20-aryl, C6- to C10-aryloxy, C2- to C10-alkenyl, C7- to C40-arylalkenyl, C2- to C10-alkynyl, sityl optionally substituted by C1-C10-hydrocarbon radicals, and amine substituted by C1- to C20-hydrocarbon radicals,
- with the proviso that at least one substituent is bulky.
3 more elements
A process for the preparation of a metal- and metalloid-free cyclopentadienide compound of the general formula (II)
- 9
- wherein
- Q+ represents either a Lewis-acid cation according to the Lewis acid-base theory, selected from the group consisting of carbonium, oxonium and sulfonium cations, or
- Q+ represents a Brönstedt-acid cation according to the Brönstedt acid-base theory,
- Y represents a (CR26)m group wherein m=from 0 to 4, wherein the radicals R6 may be identical or different and, when m=0, the ring may be closed or open, with the proviso that, when the ring is open, the free valences at the terminal carbon atoms are saturated by radicals R having the same meaning as R1-R6,
- comprising the steps of:
- a) reacting a cyclopentadiene appropriately substituted by the substituents R1-R6 with an alkyl metal compound or a metal to form a reaction product, wherein
- R1-R6 represent identical or different substituents selected from the group consisting of hydrogen, phenyl, aryl, C1- to C20-alkyl, C1-C10-haloalkyl, C6-C10-haloaryl, C1- to C10-alkoxy, C6- to C20-aryl, C6- to C10-aryloxy, C2- to C10-alkenyl, C7- to C40-arylalkenyl, C2- to C10-alkynyl, silyl optionally substituted by C1-C10-hydrocarbon radicals, amine substituted by C1- to C20-hydrocarbon radicals,
- with the proviso that at least one substituent is bulky,
- b) reacting the reaction product with a halide of a non-metallic cation;
- and
- c) removing the metal halide.
9 more elements
A process for the polymerization of olefins, wherein polymerization is carried out in the presence of
- a) at least one organic transition metal compound;
- b) at least one cyclopentadienide compound of the general formula (II)
- 10
- wherein
- Q+ represents either a Lewis-acid cation according to the Lewis acid-base theory, selected from the group consisting of carbonium, oxonium and sulfonium cations, or
- Q+ represents a Brönstedt-acid cation according to the Brönstedt acid-base theory,
- Y represents a (CR26)m group wherein m=from 0 to 4, wherein the radicals R6 may be identical or different and, when m=0, the ring may be closed or open, with the proviso that, when the ring is open, the free valences at the terminal carbon atoms are saturated by radicals R having the same meaning as R1-R6,
- R1-R6 represent identical or different substituents selected from the group consisting of hydrogen, phenyl, aryl, C1- to C20-alkyl, C1-C10-haloalkyl, C6-C10-haloaryl, C1- to C10-alkoxy, C6- to C20-aryl, C6- to C10-aryloxy, C2- to C10-alkenyl, C7- to C40-arylalkenyl, C2- to C10-alkynyl, silyl optionally substituted by C1-C10-hydrocarbon radicals, and amine substituted by C1- to C20-hydrocarbon radicals,
- with the proviso that at least one substituent is bulky, and optionally,
- c) one or more organoaluminum compounds.
7 more elements
A catalyst comprising a metal- and metalloid-free cyclopentadienide compound of the general formula (II)
- 11
- wherein
- Q+ represents either a Lewis-acid cation according to the Lewis acid-base theory, selected from the group consisting of carbonium, oxonium and sulfonium cations, or
- Q+ represents a Brönstedt-acid cation according to the Brönstedt acid-base theory,
- Y represents a (CR26)m group wherein m=from 0 to 4, wherein the radicals R6 may be identical or different and, when m=0, the ring may be closed or open, with the proviso that, when the ring is open, the free valences at the terminal carbon atoms are saturated by radicals R having the same meaning as R1-R6,
- R1-R6 represent identical or different substituents selected from the group consisting of hydrogen, phenyl, aryl, C1- to C20-alkyl, C1-C10-haloalkyl, C6-C10-haloaryl, C1- to C10-alkoxy, C6- to C20-aryl, C6- to C10-aryloxy, C2- to C10-alkenyl, C7- to C40-arylalkenyl, C2- to C10-alkynyl, silyl optionally substituted by C1-C10-hydrocarbon radicals, and amine substituted by C1- to C20-hydrocarbon radicals,
- with the proviso that at least one substituent is bulky.
4 more elements
Dependencies are inferred from the claim text.