Examples of 'bridged metallocene' in a sentence
Meaning of "bridged metallocene"
bridged metallocene: A specific type of chemical compound often used in polymerization reactions and as a catalyst
How to use "bridged metallocene" in a sentence
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bridged metallocene
The present invention relates to bridged metallocene compounds.
The bridged metallocene catalyst may be made by one of several methods.
Each of the cycloalkadienyl ligands of the bridged metallocene catalyst has facial chirality.
The resulting bridged metallocene is isolated by methods known to those skilled in the art.
The second catalyst component can comprise a single atom bridged metallocene compound with a fluorenyl group.
The compound is a bridged metallocene compound having dissimilar cyclopentadienyl groups and no bilateral symmetry.
CATALYST COMPOSITIONS The present invention employs catalyst compositions containing a bridged metallocene compound.
The ligands of the cyclic bridged metallocene catalyst compounds can be achiral.
In another embodiment, the invention provides a process wherein said metallocene is a bridged metallocene.
The bridged metallocene compounds of catalyst component II also are discussed above.
METALLOCENE COMPOUNDS The present invention employs a bridged metallocene compound having both a cyclopentadienyl and a fluorenyl moiety.
Cyclic bridged metallocene catalyst compounds can be represented by the formula,.
A process for preparing a bridged metallocene comprising,.
The single atom bridged metallocene compounds of catalyst component II also are discussed hereinabove.
Process for the preparation of a bridged metallocene compound in which,.
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Furthermore, the bridged metallocene compounds obtained as reaction product have a low stability.
In order to improve the properties of the resins, bridged metallocene catalysts were developed.
Then, preferred bridged metallocene compounds having these chemical structural features will be exemplified.
The invention relates to a process for the preparation of a bridged metallocene compound in which,.
In one embodiment, the bridged metallocene catalyst component has two or more bridging groups.
The method of claim 6, wherein the metallocene catalyst is a bridged metallocene having the formula, wherein,.
Zirconocene a is a bridged metallocene having tetrahydroindenyl ( THI ) ligand system.
Metallocene " MET 2 " is a comparative bridged metallocene compound.
Moreover, the bridged metallocene compounds of catalyst component III are discussed above.
Preferably the metallocene-based polymerization catalyst comprises a bridged metallocene component, a support and an activating agent.
Such a bridged metallocene compound has the formula, wherein,.
In an alternative embodiment, the CATCOMP comprises a bridged metallocene compound hereinafter designated MTE-B.
A bridged metallocene catalyst, for example, may be described by the general formula,.
According to the invention, the bridged metallocene consists of a meso or racemic stereoisomer.
In an embodiment, MTE-B is a bridged metallocene.
The bridged metallocene catalyst component of formula ( II ) may have two or more bridging groups ( A ).
The catalyst system generally includes a bridged metallocene catalyst compound, optionally with a co-catalyst.
One or more bridged metallocene compounds of formula ( I ), as described above, and.
Runs 17 and 18 were copolymerizations carried out using the unbridged metallocene without any bridged metallocene present.
In this invention, such a bridged metallocene compound has the formula, wherein,.
The process of claim 3, wherein catalyst component I comprises a bridged metallocene compound having formula ( IB ), wherein,.
This example demonstrate the use of a chiral bridged metallocene to prepare isotactic polypropylene ( i-PP ).
The process of claim 1 or 2 wherein the bridged metallocene catalyst has the formula, wherein.
The coextruded film of claim 1, wherein the bridged metallocene catalyst is a bis tetrahydro-indenyl compound.
Runs 20-22 involved the use of both the supported bridged metallocene and the unbridged metallocene.
Run 23 employed only the cocatalyst-supported bridged metallocene bis ( fluorenyl ) ( dimethyl ) silyl zirconium dichloride.
Metallocene " MET 1 " in FIG . 1, is representative of the bridged metallocene compounds of the present invention.
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