Multi-catalyst system for olefin polymerization
First Claim
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1. A multi-catalyst system that comprises(a) catalyst A, a supported bridged indenoindolyl transition metal complex;
- and (b) catalyst B, a supported non-bridged indenoindolyl transition metal complex;
wherein A and B are separately supported.
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Abstract
A multi-catalyst system is disclosed. The catalyst system comprises catalyst A and catalyst B. Catalyst A comprises a supported bridged indenoindolyl transition metal complex. Catalyst B comprises a supported non-bridged indenoindolyl transition metal complex. The catalyst system of the invention produces polyolefins which have bi- or multi-modal molecular weight distribution.
27 Citations
19 Claims
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1. A multi-catalyst system that comprises
(a) catalyst A, a supported bridged indenoindolyl transition metal complex; - and
(b) catalyst B, a supported non-bridged indenoindolyl transition metal complex;
wherein A and B are separately supported. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
in which M is a transition metal;
G is a bridge group;
L is a ligand that is covalently bonded to G and M;
R is selected from the group consisting of alkyl, aryl, aralkyl, boryl and silyl groups;
X is selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, halide, dialkylamino, and siloxy groups;
n satisfies the valence of M; and
one or more of the remaining ring atoms are optionally independently substituted by alkyl, aryl, aralkyl, alkylaryl, silyl, halogen, alkoxy, aryloxy, siloxy, nitro, dialkyl amino, or diaryl amino groups.
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3. The catalyst system of claim 2 wherein L is selected from the group consisting of cyclopentadienyls, indenyls, fluorenyls, boraarys, pyrrolyls, azaborolinyls, quinolinyls, indenoindolyls, phosphinimines, and alkylaminos.
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4. The catalyst system of claim 2 wherein G is selected from the group consisting of dialkylsilyl, diarylsilyl, methylene, ethylene, isopropylidene, and diphenylmethylene.
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5. The catalyst system of claim 2 wherein the bridged complex has the general structure of I or II and wherein M is a Group 4 transition metal, L is alkylamido, and G is dialkylsilyl.
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6. The catalyst system of claim 5 wherein M is Ti or Zr, L is t-butylamino, G is dimethylsilyl, and X is halide or alkyl.
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7. The catalyst system of claim 2 wherein the bridged complex has the general structure of III or IV and wherein M is a Group 4 transition metal, L is alkylamido, and G is dialkylsilyl.
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8. The catalyst system of claim 7 wherein M is Ti or Zr, L is t-butylamino, G is dimethylsilyl, and X is halide or alkyl.
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9. The catalyst system of claim 1 wherein the non-bridged complex of catalyst B has the general structure of
in which R is selected from the group consisting of alkyl, aryl, aralkyl, boryl and silyl groups; - M is a Group 4-6 transition metal;
L is selected from the group consisting of substituted or non-substituted cyclopentadienyls, indenyls, fluorenyls, boraarys, pyrrolyls, azaborolinyls, quinolinyls, indenoindolyls, and phosphinimines;
X is selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, halide, dialkylamino, and siloxy groups, and n satisfies the valence of M; and
one or more of the remaining ring atoms are optionally substituted by alkyl, aryl, aralkyl, alkylaryl, silyl, halogen, alkoxy, aryloxy, siloxy, nitro, dialkyl amino, or diaryl amino groups.
- M is a Group 4-6 transition metal;
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10. The catalyst system of claim 9 wherein R is methyl, L is cyclopentadienyl;
- M is Zr;
X is chloride, and n is 2.
- M is Zr;
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11. The catalyst system of claim 1 wherein catalyst A further comprises an activator selected from the group consisting of alumoxanes, alkyl aluminums, alkyl aluminum halides, anionic compounds of boron or aluminum, trialkylboron and triarylboron compounds, and mixtures thereof.
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12. The catalyst system of claim 11 wherein the activator is an alumoxane.
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13. The catalyst system of claim 1 wherein catalyst B further comprises an activator selected from the group consisting of alumoxanes, alkyl aluminums, alkyl aluminum halides, anionic compounds of boron or aluminum, trialkylboron and triarylboron compounds, and mixtures thereof.
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14. The catalyst system of claim 13 wherein the activator is an alumoxane.
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15. The catalyst system of claim 1 wherein the support in catalyst A and catalyst B is silica.
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16. A process comprising polymerizing an α
- -olefin in the presence of the catalyst system of claim 1.
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17. The process of claim 16 which produces a polyolefin having bi- or multi-modal molecular weight distribution.
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18. The process of claim 16 wherein the α
- -olefin is selected from the group consisting of ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene, and mixtures thereof.
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19. A process comprising polymerizing an α
- -olefin in the presence of a multi-catalyst system that comprises
(a) catalyst A, a supported bridged indenoindolyl transition metal complex; and
(b) catalyst B, a supported non-bridged indenoindolyl transition metal complex;
wherein A and B are separately supported, said process produces an polyolefin having bi- or multi-modal molecular weight distribution.
- -olefin in the presence of a multi-catalyst system that comprises
Specification