Supported Catalyst Systems and Methods of Using the Same
AssigneeExxonMobil Chemical Patents Inc.
InventorsRohan A. Hule, Antonios K. Doufas, Derek W. Thurman, Crlsita Carmen H. Atienza, Matthew W. Hoitcamp, David F. Sanders, Matthew S. Bedoya
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Abstract
This invention relates to a catalyst system including the reaction product of a support (such as a fluorided silica support that preferably has not been calcined at a temperature of 400° C. or more), an activator and at least two different transition metal catalyst compounds; methods of making such catalyst systems, polymerization processes using such catalyst systems and polymers made therefrom.
Claims25
A catalyst system comprising the reaction product of a support (preferably silica), an activator, a first catalyst compound, and a second catalyst compound, where the first catalyst compound is represented by the Formula I:
- wherein:
- M is a group 3 to 14 metal;
- each X is independently an anionic leaving group;
- n is the formal oxidation state of M;
- m is the formal charge of the ligand comprising Y, Z, and L;
- Y is a group 15 element;
- Z is a group 15 element;
- L is a group 15 or 16 element;
- R1 and R2 are independently a C1 to C20 hydrocarbon group, a heteroatom containing group, silicon, germanium, tin, lead, phosphorus, or halogen;
- R1 and R2 may also be interconnected to each other;
- R3 is absent, or is hydrogen, a group 14 atom containing group, a halogen, or a heteroatom containing group;
- R4 and R5 are independently an aryl group, a substituted aryl group, a cyclic alkyl group, a substituted cyclic alkyl group, or a multiple ring system;
- and
- R6 and R7 are independently absent, hydrogen, a halogen, a heteroatom, a hydrocarbyl group, or a heteroatom containing group;
- and
- the second catalyst compound is represented by the formula (IV):
- where M is a group 4 metal;
- X1 and X2 are independently a univalent C1-C20 hydrocarbyl, C1-C20 substituted hydrocarbyl, a heteroatom or a heteroatom-containing group, or X1 and X2 join together to form a C4-C62 cyclic or polycyclic ring structure;
- R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 is independently hydrogen, C1-C40 hydrocarbyl, C1-C40 substituted hydrocarbyl, a heteroatom or a heteroatom-containing group, or two or more of R1, R2, R3, R4, R5, R6, R7, R8, R9, or R10 are joined together to form a C4-C62 cyclic or polycyclic ring structure, or a combination thereof;
- Q is a neutral donor group;
- J is a substituted or unsubstituted C7-C60 fused polycyclic group, where at least one ring is aromatic and where at least one ring, which may or may not be aromatic, has at least five ring atoms;
- G is as defined for J or may be hydrogen, C2-C60 hydrocarbyl, C1-C60 substituted hydrocarbyl, or may independently form a C4-C60 cyclic or polycyclic ring structure with R6, R7, or R8 or a combination thereof;
- and
- Y is divalent C1-C20 hydrocarbyl or divalent C1-C20 substituted hydrocarbyl.
A polyolefin comprising at least 50 mol % ethylene and at least one C3 to C20 olefin comonomer where the polyolefin has a density of 0.930 to 0.965 g/cc;
- an Mw of at least 50,000 g/mol (alternately a density of 0.935 to 0.950 g/cc;
- an Mw of at least 100,000 g/mol, alternately an Mw of at least 200,000 g/mol and a density of greater than 0.930 to 0.960 g/cc);
- and a melt strength of:
- 1) Z Newtons or more, where Z=0.0003(the shear thinning index)+0.1,
- 2) Y Newtons or more, where Y=0.0000006(Mw)+0.0075, or
- 3) X Newtons or more, where X=0.0000004(CV)+0.10, where CV is the complex viscosity at 190° C. and angular frequency of 0.02 rad/s, where the melt strength is measured at 190° C. using a die length of 30 mm and die diameter of 2 mm.
Dependencies are inferred from the claim text.