Process and catalyst for polyolefin density and molecular weight control
First Claim
Patent Images
1. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B, 5B, 6B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, ethyl, propyl, butyl, amyl, isoamyl, hexyl, isobutyl, heptyl, octyl, nonyl, decyl, cetyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical and (b) an alumoxane.
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Abstract
Catalysts comprising (a) derivatives of mono, bi and tricyclopentadienyl coordination complexes with a transition metal and (b) and an alumoxane are employed in a process of producing polyolefins of controlled molecular weight.
729 Citations
33 Claims
- 1. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B, 5B, 6B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, ethyl, propyl, butyl, amyl, isoamyl, hexyl, isobutyl, heptyl, octyl, nonyl, decyl, cetyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical and (b) an alumoxane.- View Dependent Claims (2, 3, 4, 5, 6)
- 7. A catalyst system for the polymerization of olefins comprising (a) a single metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B, 5B, 6B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.
- 8. A catalyst system for the polymerization of olefins to a polyolefin having a molecular weight which can be dependent on a choice of metallocene catalyst component comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B metal, (C5 R'"'"'m) is a dialkyl, tri-alkyl, tetra-alkyl or penta-alkyl cyclopentadienyl or (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1 to 20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.
- 9. A catalyst system comprising a metallocene catalyst component and an alumoxane, which polymerizes olefins to polymers of a molecular weight distribution expressed as Mw /Mn of from 1.5 to 4.0, in which the metallocene catalyst component consists essentially of a metallocene represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is zirconium, a (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1, at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical.
- 10. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component consisting of metallocenes represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B metal, a (C5 R'"'"'m) is a dialkyl, tri-alkyl, tetra-alkyl or penta-alkyl cyclopentadienyl or a (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.
- 11. A catalyst system comprising a metallocene catalyst component and an alumoxane, which polymerizes olefins to polymers of a molecular weight distribution expressed as Mw /Mn of from 1.5 to 4.0, in which the metallocene catalyst component is represented by the formula
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is titanium, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0,1 or 2 and when s is 1, m is 4 and p is 1.
- 12. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B metal, at least one (C5 R'"'"'m) is a di-alkyl, tri-alkyl, tetra-alkyl or penta-alkyl cyclopentadienyl or (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an alkyl or arylalkyl radical having from 1 to 20 carbon atoms, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.
- 13. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B metal, a (C5 R'"'"'m) is a dialkyl, tri-alkyl, tetra-alkyl or penta-alkyl cyclopentadienyl (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkenyl, aryl, alkylaryl or arylalky radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is an alkylene, germanium, silicon, phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0,1 or 2 and when s is 1, m is 4 and p is 1 ;
at least one R'"'"' is a hydrocarbyl radical when at least one O is an alkyl radical; and
(b) an alumoxane.- View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
- 15. The catalyst system of claim 14, wherein s is 1.
- 16. The catalyst system of claim 15, wherein R" is a C1 -C4 alkylene radical, a dialkyl germanium, dialkyl silicon or an alkyl phosphine or amine radical.
- 17. The catalyst system of claim 16, wherein R" is a dialkyl silyl radical.
- 18. The catalyst system of claim 17, wherein R" is a dimethylsilyl radical.
- 19. The catalyst system of claims 14 or 16, wherein Q is chlorine or methyl.
- 20. The catalyst system of claim 19, wherein Me is Zr or Ti.
- 21. The catalyst system of claims 14 or 16, wherein a (C5 R'"'"'m) is a dialkyl substituted cyclopentadienyl group.
- 22. The catalyst system of claim 21, wherein s is O.
- 23. The catalyst system of claim 13 or 14, wherein Me is Zr.
- 24. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.
- 25. A catalyst system for the polymerization of olefins comprising (a) a single metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1; and
(b) an alumoxane.
- 26. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)TiQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 TiQ'"'"'wherein (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.
- 27. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)TiQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 TiQ'"'"'wherein (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1; and
(b) an alumoxane.
- 28. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m) ZrQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 ZrQ'"'"'wherein (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1 to 20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.- View Dependent Claims (29, 30)
- 31. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B, 5B, 6B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 1 and m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical; and
(b) an alumoxane.
- 32. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, an alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an aryl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1; and
(b) an alumoxane.
- 33. A catalyst system for the polymerization of olefins comprising (a) a metallocene catalyst component represented by the formulas
- space="preserve" listing-type="equation">(C.sub.5 R'"'"'.sub.m).sub.p R".sub.s (C.sub.5 R'"'"'.sub.m)MeQ.sub.3-p and
space="preserve" listing-type="equation">R".sub.s (C.sub.5 R'"'"'.sub.m).sub.2 MeQ'"'"'wherein Me is a Group 4B, 5B, 6B metal, (C5 R'"'"'m) is a substituted cyclopentadienyl, each R'"'"', which can be the same or different, is hydrogen, alkyl, alkenyl, aryl, alkylaryl or arylalkyl radical having from 1 to 20 carbon atoms or two adjacent carbon atoms are joined together to form a C4 -C6 ring, R" is a C1 -C4 alkylene radical, a dialkyl germanium or silicon, or an alkyl phosphine or amine radical substituting on and bridging two (C5 R'"'"'m) rings, each Q which can be the same or different is an ethyl, propyl, butyl, amyl, isoamyl, hexyl, isobutyl, heptyl, octyl, nonyl, decyl, cetyl, alkyl, aryl, alkyl, alkenyl, alkylaryl, or arylalkyl radical having from 1 to 20 carbon atoms or halogen, Q'"'"' is an alkylidene radical having from 1-20 carbon atoms, s is 0 or 1 and when s is 0, m is 5 and p is 0, 1 or 2 and when s is 1, m is 4 and p is 1;
at least one R'"'"' is a hydrocarbyl radical when at least one Q is an alkyl radical and (b) an alumoxane.
Specification
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Current AssigneeExxon Chemical Patents Inc. (Exxon Mobil Corporation)
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Original AssigneeExxon Chemical Patents Inc. (Exxon Mobil Corporation)
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InventorsEwen, John A., Welborn, Howard C. Jr.
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Primary Examiner(s)Smith, Edward J.
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Application NumberUS07/752,415Time in Patent Office1,033 DaysField of Search502/103, 502/117, 526/127, 526/160, 526/121, 526/150US Class Current526/160CPC Class CodesC07F 17/00 MetallocenesC08F 10/00 Homopolymers and copolymers...C08F 110/02 EtheneC08F 210/06 PropeneC08F 210/16 Copolymers of ethene with a...C08F 2500/08 Low density, i.e. < 0.91 g/cm3C08F 2500/17 ViscosityC08F 4/63922 containing at least two cyc...C08F 4/65912 in combination with an orga...C08F 4/6592 containing at least one cyc...C08F 4/65927 two cyclopentadienyl rings ...Y10S 526/904 Monomer polymerized in pres...Y10S 526/943 Polymerization with metallo...
