# US 10,118,975 B2 · Bicyclic bridged metallocene compounds and polymers produced therefrom

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- Number: US 10,118,975 B2
- Document ID: US10118975B2
- Status: Granted
- Kind: B2
- Application number: 15/673,456
- Filed: 2017-08-10
- Published: 2017-11-30
- Granted: 2018-11-06
- Earliest claimed: 2016-05-25
- Assignees: Chevron Phillips Chemical Company LP
- Applicants: Chevron Phillips Chemical Company LP
- Inventors: Jeremy M. Praetorius; Qing Yang; Connor D. Boxell; Tony R. Crain
- Web page: https://patentgrep.com/patent/US10118975B2

## CPC

- C08F 4/65927: {two cyclopentadienyl rings being mutually bridged}
- C07F 17/00: Metallocenes
- C08F 10/00: Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
- C08F 4/65908: {in combination with an ionising compound other than alumoxane, e.g. (C6F5)4B-X+}
- C08F 2410/07: Catalyst support treated by an anion, e.g. Cl-, F-, SO42-
- C08F 2420/11: Non-aromatic cycle-substituted bridge, i.e. Cp or analog where the bridge linking the two Cps or analogs is substituted by a non-aromatic cycle
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)

## Abstract

Disclosed herein are catalyst compositions containing bicyclic bridged metallocene compounds. These catalyst compositions can be used for the polymerization of olefins. For example, ethylene polymers produced using these catalyst compositions can be characterized by low molecular weights and high melt flow rates, and can be produced without the addition of hydrogen.

## Claims

### Claim 1

A metallocene compound having the formula:
wherein:
M is Ti, Zr, or Hf;
each X independently is a monoanionic ligand;
E is a hydrocarbon bicyclic bridging group with a single carbon atom connected to Cp1 and Cp2; and
Cp1 and Cp2 independently are a substituted or unsubstituted cyclopentadienyl, indenyl, or fluorenyl group.

### Claim 2 (depends on 1)

The compound of claim 1, wherein:
E is a C7 to C12 hydrocarbon bicyclic bridging group; and
at least one of Cp1 and Cp2 has a C1 to C18 hydrocarbyl substituent.

### Claim 3 (depends on 2)

The compound of claim 2, wherein each X is Cl.

### Claim 4 (depends on 1)

The compound of claim 1, wherein:
at least one of Cp1 and Cp2 is unsubstituted; and
E is a C7 to C10 saturated hydrocarbon or aromatic hydrocarbon bicyclic bridging group.

### Claim 5 (depends on 4)

The compound of claim 4, wherein each X is Cl.

### Claim 6 (depends on 1)

The compound of claim 1, wherein at least one of Cp1 and Cp2 has a substituent selected from H, a halide, a C1 to C36 hydrocarbyl group, a C1 to C36 halogenated hydrocarbyl group, a C1 to C36 hydrocarboxy group, or a C1 to C36 hydrocarbylsilyl group.

### Claim 7 (depends on 1)

The compound of claim 1, wherein at least one of Cp1 and Cp2 has a substituent selected from a C1 to C8 alkyl group or a C3 to C8 terminal alkenyl group.

### Claim 8 (depends on 1)

The compound of claim 1, wherein:
Cp1 is a substituted or unsubstituted indenyl or fluorenyl group; and
Cp2 is a substituted or unsubstituted cyclopentadienyl group.

### Claim 9 (depends on 8)

The compound of claim 8, wherein E is a C7 to C12 hydrocarbon bicyclic bridging group.

### Claim 10 (depends on 9)

The compound of claim 9, wherein:
M is Zr; and
each X is Cl.

### Claim 11 (depends on 8)

The compound of claim 8, wherein:
at least one of Cp1 and Cp2 is unsubstituted; and
E is a C7 to C10 saturated hydrocarbon or aromatic hydrocarbon bicyclic bridging group.