Exxonmobil Chemical Patents Inc.

Jacqueline A Lovell

Donna Jean Crowther

Patrick Brant

Hua Zhou

Matthew William Holtcamp

John Robert Hagadorn

Laughlin G McCullough

Yong Yang

Man Kit Ng

Charles James Ruff

Patrick C Chen

Carlos R Lopez-Barron

Caol P Huff

Md Safatul Islam

Carlos U De Gracia

Carlos U De Garcia

This invention relates to a process to polymerize olefins comprising contacting, in solution phase at a temperature of 60&#xb0; C. to 200&#xb0; C., ethylene, and at least one olefin comonomer with a catalyst system comprising a non-coordinating anion activator and a metallocene catalyst compound, preferably represented by the formula: and2) obtaining ethylene polymer having an Mw greater than 100,000 g/mol, preferably greater tha 400,000 g/mol.

Solution process to make ethylene copolymers

Unsaturated and hydrogenated polyalpha-olefin products can be made with a high selectivity toward vinylidenes and tri-substituted vinylenes combined, a high selectivity toward vinylidenes, and a low selectivity toward 1,2-di-substituted vinylenes by using a catalyst system comprising a metallocene compound having the following structure in the polymerization reaction: 

Metallocene-catalyzed polyalpha-olefins

In at least one embodiment, a catalyst compound is represented by Formula (I): 

Sterically hindered metallocenes, synthesis and use

This invention relates to novel transition metal catalyst compounds comprising four oxygen atoms bonded to a transition metal where two of the oxygen groups are bond to the metal by dative bonds, catalyst systems comprising such and polymerization processes using such.

Catalyst compositions and use thereof

This invention relates to novel transition metal catalyst compounds comprising four oxygen atoms bonded to a transition metal where two of the oxygen groups are bonded to the metal by dative bonds and a silyl or germyl bridge, catalyst systems comprising such, and polymerization processes using such.

A process for making a branched cyclic olefin copolymer (bCOC), and the bCOC therefrom, comprising combining at a temperature within a range from 60&#xb0; C. to 140&#xb0; C. a catalyst precursor and an activator with a feed comprising ethylene and at least one cyclic olefin; where the catalyst precursor is selected from the group consisting of C-symmetric Group 4 metallocenes comprising any two ligands selected from cyclopentadienyl and ligands isolobal to the cyclopentadienyl group. The resulting bCOC is desirably semi-crystalline and useful in such articles as tubing, thermoformed and foamed articles.

Cyclic olefin copolymers and methods of making them

This invention relates to processes to produce polyethylene involving contacting ethylene with a metallocene catalyst system; wherein the catalyst system comprises: a stoichiometric activator; and a metallocene compound. The metallocene catalyst system is also disclosed.

Production of vinyl terminated polyethylene

This invention relates to the reaction product(s) of a polyalkylhydrosiloxane and a vinyl terminated macromonomer (VTM).

Hydrosilation of vinyl-terminated macromonomers

This invention relates to a process to functionalize polyolefins comprising contacting a metallocene catalyst with a difunctional diblock hydrosilane, and one or more vinyl terminated polyolefins. This invention further relates to the diblock hydrosilane-functionalized polyolefins produced thereby.

Block copolymers from silylated vinyl terminated macromers

This invention relates to a homogenous process for making a vinyl terminated propylene polymer, wherein the process comprises: contacting, propylene, under polymerization conditions, with a catalyst system comprising an activator and at least one metallocene compound, where the metallocene compound is represented by the formula: where: M is hafnium or zirconium; each X is a group bound to M as described herein; each Rand Ris, independently, a Cto Calkyl group; each Ris, independently, hydrogen; each R, R, and R, is, independently, hydrogen or a substituted or unsubstituted hydrocarbyl group, a heteroatom or heteroatom containing group; T is a bridging group as described herein; and further provided that any of adjacent R, R, and Rgroups may form a fused ring or multicenter fused ring system where the rings may be aromatic, partially saturated or saturated, wherein the activator comprises a non-coordinating anion.

Catalysts and methods of use thereof to produce vinyl terminated polymers

This invention relates to a polymer of a cyclic olefin and a vinyl terminated macromonomer, and processes for the production thereof.

Functionalization of vinyl terminated polymers by ring opening cross metathesis

This invention relates to a process to functionalize polyolefins comprising contacting a metallocene catalyst with a hydrosilane, and one or more vinyl terminated polyolefins. This invention further relates to the hydrosilane-functionalized polyolefins produced thereby.

Hydrosilyation of vinyl macromers with metallocenes

This invention relates to a homogenous process for making a vinyl terminated propylene polymer, wherein the process comprises: contacting, propylene, under polymerization conditions, with a catalyst system comprising an activator and at least one metallocene compound, where the metallocene compound is represented by the formula: where: M is hafnium or zirconium; each X is, independently, selected from the group consisting of hydrocarbyl radicals having from 1 to 20 carbon atoms, hydrides, amides, alkoxides, sulfides, phosphides, halides, dienes, amines, phosphines, ethers, and a combination thereof, (two X's may form a part of a fused ring or a ring system); each Ris, independently, a Cto Calkyl group; each Ris, independently, a Cto Calkyl group; each Ris, independently, hydrogen; each R, R, and R, is, independently, hydrogen or a substituted or unsubstituted hydrocarbyl group, a heteroatom or heteroatom containing group; T is a bridging group; each Ris, independently, hydrogen, halogen, or a Cto Chydrocarbyl, and two Rcan form a cyclic structure including aromatic, partially saturated, or saturated cyclic or fused ring system; and further provided that any of adjacent R, R, and Rgroups may form a fused ring or multicenter fused ring system where the rings may be aromatic, partially saturated or saturated.

Growing community of inventors

Houston, TX, United States of America

Jacqueline A Lovell