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Yong Yang, John R Hagadorn, Andy H Tsou: Graft engineering thermoplastics with polyolefins. ExxonMobil Chemical Patents, July 4, 2017: US09695288 (1 worldwide citation)

A graft copolymer comprising polyolefin and engineering thermoplastic components, wherein the thermoplastic component is a polymer comprising heteroatoms or heteroatom containing moieties in its backbone and phenyl or substituted phenyl groups, the polyolefin component covalently bound to the engine ...


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John R Hagadorn, Ilya S Borisov, Arkady K Golenishchev, Dmitry V Uborsky, Alexander Z Voskoboynikov, Oleg V Samsonov, Michail I Sharikov: Pyridyldiamide metal catalysts and processes to produce polyolefins. ExxonMobil Chemical Patents, April 26, 2016: US09321858 (1 worldwide citation)

Disclosed are new classes of pyridyldiamide catalyst components useful in olefin polymerization, an example of which includes: wherein M is a hafnium or zirconium; R1 and R11 are selected from phenyl and substituted phenyl, wherein the substitutions are selected from C1 to C5 hydrocarbyls, preferabl ...


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John R Hagadorn, Jian Yang, Patrick J Palafox: Reversible chain-transfer in polyolefin polymerization with pyridyldiamide catalysts. ExxonMobil Chemical Patents, February 2, 2016: US09249238 (1 worldwide citation)

A process of producing ethylene α-olefin copolymers, especially ethylene block copolymers, comprising contacting ethylene and a C3 to C10 α-olefin with a transition metal pyridyldiamide (MPN3) catalyst component and an activator, as well as from 10 equivalents to 1000 equivalents relative to the cat ...


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Matthew W Holtcamp, Charles J Ruff, Donna J Crowther, John R Hagadorn, Patrick Brant: Vinyl terminated higher olefin polymers and methods to produce thereof. ExxonMobil Chemical Patents, Catherine L Bell, September 23, 2014: US08841397

This invention relates to higher olefin vinyl terminated polymers having an Mn of at least 200 g/mol (measured by 1H NMR) including of one or more C4 to C40 higher olefin derived units, where the higher olefin vinyl terminated polymer comprises substantially no propylene derived units; and wherein t ...


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Matthew W Holtcamp, John R Hagadorn, Gregory S Day, Machteld M W Mertens, Gerardo J Majano Sanchez, Rohan A Hule: Polymerization process using pyridyldiamido compounds supported on organoaluminum treated layered silicate supports. ExxonMobil Chemical Patents, May 29, 2018: US09982067

This invention relates to a process to polymerize olefins comprising: i) contacting one or more olefins with a catalyst system comprising: 1) a support comprising an organoaluminum treated layered silicate and an inorganic oxide; and 2) a pyridyldiamido compound; and ii) obtaining olefin polymer hav ...


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John R Hagadorn, Matthew W Holtcamp, Andrew G Narvaez Jr, Donna J Crowther, Patrick Brant: Olefin functionalization by metathesis reaction. ExxonMobil Chemical Patents, Kevin M Faulkner, Catherine L Bell, January 7, 2014: US08623962

This invention relates to a process to functionalize propylene co-oligomer comprising contacting an alkene metathesis catalyst with a heteroatom containing alkene, and a propylene a co-oligomer having an Mn of 300 to 30,000 g/mol comprising 10 to 90 mol % propylene and 10 to 90 mol % of ethylene, wh ...


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Garth R Giesbrecht, Matthew W Holtcamp, Gregory S Day, John R Hagadorn: Vinyl terminated macromonomers. ExxonMobil Chemical Patents, Ramot at Tel Aviv University, Daniel N Lundeen, Lundeen & Lundeen PLLC, January 31, 2017: US09556287

Polymers produced by a process comprising contacting one or more olefins with a catalyst system comprising an activator and a Salan catalyst disposed on a support.


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Matthew W Holtcamp, John R Hagadorn, Caol P Huff, Matthew S Bedoya, Catherine Anne Faler: Polymers prepared by ring opening / cross metathesis. ExxonMobil Chemical Patents, November 10, 2015: US09181360

This invention relates to a process for producing a polymer of a cyclic olefin and a linear mono-olefin, the process comprising contacting at least one C5 based cyclic olefin with at least one linear mono-olefin having from two to twenty carbon atoms in the presence of an alkene metathesis catalyst, ...


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Matthew W Holtcamp, Matthew S Bedoya, Catherine A Faler, Caol P Huff, John R Hagadorn, Renuka N Ganesh: Metathesis catalysts and processes for use thereof. ExxonMobil Chemical Patents, May 5, 2015: US09024034

This invention relates to a metathesis catalyst compound comprising an asymmetrically substituted N-heterocyclic carbene (NHC) metathesis catalyst and a process to make linear alpha-olefins comprising contacting a feed material and an optional alkene (such as ethylene) with said catalyst, where the ...