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US 7,396,888 B2Granted
Catalyst system comprising a mixture of catalyst components for producing a polyolefin blend
AssigneeTotal Petrochemicals Research Feluy
InventorAbbas Razavi
Life of this patent
Estimating the term…
Abstract
Provided is a catalyst system for producing a polyolefin blend, which catalyst system comprises a mixture including the following catalyst components: i) a catalyst component A capable of producing an isotactic olefin polymer, and/or a catalyst component A′ capable of producing a polymer comprising an isotactic polyolefin block; and ii) a catalyst component B capable of producing a syndiotactic polyolefin, and/or a catalyst component B′ capable of producing a polymer comprising a syndiotactic polyolefin block; wherein each of the components in the catalyst system is distinct from the other components in the catalyst system.
Claims18
A catalyst system for producing a polyolefin blend, which catalyst system comprises a mixture of a first catalyst component supported on a first support and a second catalyst component supported on a second support, wherein the first catalyst component is at least one of a catalyst component A capable of producing an isotactic olefin polymer, and a catalyst component A′ capable of producing a polymer comprising an isotactic polyolefin block;
- and the second catalyst component is at least one of a catalyst component B capable of producing an syndiotactie polyolefin, and a catalyst component B′ capable of producing a polymer comprising an syndiotactic polyolefin block;
- wherein each of the components in the catalyst system is distinct from the other components in the catalyst system, and
- wherein the catalyst component A comprises at least one metallocene having the formula:
- R″(CpR1R2)(Cp′R′n)MQ2 (1)
- wherein:
- (CpR1R2) is a substituted cyclopentadienyl ring;
- (Cp′R′n) is a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge imparting stereorigidity to the component;
- R1 is a substituent on the cyclopentadienyl ring which is distal to the bridge, which distal substituent comprises a bulky group of the formula XR*3 in which X is an atom from group IVA and each R* is the same or different and is chosen from a hydrogen or a hydrocarbyl group having from 1-20 carbon atoms, R2 is a substituent on the cyclopentadienyl ring which is proximal to the bridge and positioned non-vicinal to the distal substituent and is a hydrogen or is of the formula YR#3 in which Y is an atom from group IVA, and each R# is the same or different and is chosen from a hydrogen or a hydrocarbyl group having from 1-7 carbon atoms, each R′ is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms, and n is an integer of from 0-8;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen;
- or the formula:
- (Ind)2R′MQ2 (2)
- or the formula:
- (IndH4)2R″MQ2 (3)
- wherein:
- each Ind is the same or different and is a substituted or unsubstituted indenyl group, wherein each IndH4 is the same or different and is a substituted or unsubstituted tetrahydroindenyl group, R′ is a structural bridge imparting stereorigidity to the component, R″ is a structural bridge imparting stereorigidity to the component;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen,
- wherein the catalyst component B has the formula:
- R″(CpRm)(Cp′R′r)MQ2 (4)
- wherein:
- (CpRm) is a substituted or unsubstituted cyclopentadienyl ring;
- (Cp′R′r) is a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge imparting stereorigidity to the component, each R is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms;
- each R′ is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms;
- m is an integer of from 0-4;
- r is an integer from 0-8;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen,
- wherein the catalyst component A′ has the formula:
- R″(CpRx)(Cp′R′y)MQ2 (5)
- wherein:
- (CpRx) is a substituted cyclopentadienyl ring;
- (Cp′R′y) is a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge imparting stereorigidity to the component;
- each R is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms, each R′ is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms and x and y are independently an integer of from 1-4 and 0-8 respectively;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen;
- wherein the CpRx group lack bilateral symmetry, and
- wherein the catalyst component B′ has the formula:
- R″(CpRq)XMQ2 (6)
- wherein:
- CpRq is a substituted cyclopentadienyl ring or a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge between Cp and X imparting stereorigidity to the component;
- each R is the same or different and is selected from a hydrocarbyl group having from 1-20 carbon atoms, a halogen, an alkoxy group, and alkoxyalkyl group, an alkoxyalkyl group, an alkkylamino group or an alkylsilylo group when Cp is a cyclopentadienyl ring, q is an integer from 0-4;
- and when Cp is a fluorenyl ring q is an integer from 0-8;
- X is a heteroatom from group VA or group VIA;
- M is a metal atom from group IIIB, IVB, VB or VIB in any of its theoretical oxidation states;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen;
- wherein the bilateral symmetry of the CpRq group is maintained.
48 more elements
A process for producing a blend of an isotactic polyolefin and a syndiotactie polyolefin, which comprises:
- a. providing a catalyst system for producing a polyolefin blend, which catalyst system comprises a mixture of a first catalyst component supported on a first support and a second catalyst component supported on a second support, wherein the first catalyst component is s at least one of a catalyst component A capable of producing an isotactie olefin polymer, and a catalyst component A′ capable of producing a polymer comprising an isotactic polyolefin block;
- and the second catalyst component is at least one of a catalyst component B capable of producing an syndiotactic polyolefin, and a catalyst component B′ capable of producing a polymer comprising an syndiotactic polyolefin block;
- wherein each of the components in the catalyst system is distinct from the other components in the catalyst system, and
- wherein the catalyst component A comprises at least one metallocene having the formula:
- R″(CpR′Rb(cp′R′n)MQ2 (1)
- wherein:
- (CpR1R2) is a substituted cyclopentadienyl ring;
- (Cp′R′n) is a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge imparting stereorigidity to the component;
- R1 is a substituent on the cyclopentadienyl ring which is distal to the bridge, which distal substituent comprises a bulky group of the formula XR*3 in which X is an atom from group IVA and each R* is the same or different and is chosen from a hydrogen or a hydrocarbyl group having from 1-20 carbon atoms, R2 is a substituent on the cyclopentadienyl ring which is proximal to the bridge and positioned non-vicinal to the distal substituent and is a hydrogen or is of the formula YR#3 in which Y is an atom from group IVA, and each R# is the same or different and is chosen from a hydrogen or a hydrocarbyl group having from 1-7 carbon atoms, each R′ is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms, and n is an integer of from 0-8;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen;
- or the formula:
- (Ind)2R′MQ2 (2)
- or the formula:
- (IndH4)2R″MQ2 (3)
- wherein:
- each md is the same or different and is a substituted or unsubstituted indenyl group, wherein each IndU4 is the same or different and is a substituted or unsubstituted tetrahydroindenyl group, R′ is a structural bridge imparting stereorigidity to the component, R″ is a structural bridge imparting stercorigidity to the component;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen,
- wherein the catalyst component B has the formula:
- R″(CPRm)(CP′R′r)MQ2 (4)
- wherein:
- (CpRm) is a substituted or unsubstituted cyclopentadienyl ring;
- (Cp′R′r) is a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge imparting stereorigidity to the component, each R is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms;
- each R′ is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms;
- m is an integer of from 0-4;
- r is an integer from 0-8;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen,
- wherein the catalyst component A′ has the formula:
- R″(CpRx)(Cp′R′y)MQ2 (5)
- wherein:
- (CpRx) is a substituted cyclopentadienyl ring;
- (Cp′R′y) is a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge imparting stereorigidity to the component;
- each R is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms, each R′ is the same or different and is a hydrocarbyl group having from 1-20 carbon atoms and x and y are independently an integer of from 1-4 and 0-8 respectively;
- M is a metal atom from group IVB or is vanadium;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen;
- wherein the CpRx group lack bilateral symmetry, and
- wherein the catalyst component B′ has the formula:
- R″(CpRq)XMQ2 (6)
- wherein:
- CpRq is a substituted cyclopentadienyl ring or a substituted or unsubstituted fluorenyl ring;
- R″ is a structural bridge between Cp and X imparting stercorigidity to the component;
- each R is the same or different and is selected from a hydrocarbyl group having from 1-20 carbon atoms, an alkoxyalkyl group, an alkylamino group or an alkylsilylo group;
- from 0-4;
- and when Cp is a fluorenyl ring q is an integer from 0-8;
- X is a heteroatom from group VA or group VJA;
- M is a metal atom from group IIIB, IVB, VB or VIB in any of its theoretical oxidation states;
- and each Q is a hydrocarbon having from 1-20 carbon atoms or is a halogen;
- wherein the bilateral symmetry of the CpRq group is maintained;
- and
- further comprising a co-catalyst of an aluminum- or boron-containing activating agent capable of activating at least one of said first catalyst component and said second catalyst component;
- b. contacting said catalyst system with an olefin monomer in a polymerization reaction zone under polymerization conditions to form a polyolefin product;
- and
- c. withdrawing said polyolefin product from said polymerization reaction zone.
55 more elements
Dependencies are inferred from the claim text.