1
Ian C Stewart, David T Harris: Preparation of bottlebrush polymers via ring-opening metathesis polymerization. ExxonMobil Chemical Patents, October 27, 2015: US09169334 (2 worldwide citation)

This invention relates to a reaction product obtained by ring-opening metathesis polymerization of norbornene ketones functionalized with the residual portion of a vinyl terminated macromonomer.


2
Ian C Stewart: Olefin triblock polymers via ring-opening metathesis polymerization. ExxonMobil Chemical Patents, Catherine L Bell, March 11, 2014: US08669330 (1 worldwide citation)

This invention relates to a composition comprising a multiblock polyolefin represented by the formula: PO-(—C═C—Z—)n—C═C-PO*  (I) or PO-(—C—C—Z—)n—C—C-PO*  (Ia) wherein Z is the portion of a cyclic monomer having at least one internal double bond that remains after a ring-opening metathesis reaction ...


3
Ian C Stewart: Catalyst systems comprising multiple non-coordinating anion activators and methods for polymerization therewith. ExxonMobil Chemical Patents, Catherine L Bell, February 25, 2014: US08658556 (1 worldwide citation)

This invention relates to a method to polymerize olefins comprising contacting olefins with a catalyst system comprising a transition metal catalyst compound and: 1) at least two NCA activators represented by the formula: Zd+ (Ad-), where Z is a Bronsted acid or a reducible Lewis acid, Ad- is a boro ...


4
John R Hagadorn, Liehpao O Farng, Patrick J Palafox, Jian Yang, Ian C Stewart: Process to produce polymers from pyridyldiamido transition metal complexes and use thereof. ExxonMobil Chemical Patents, Catherine L Bell, February 16, 2016: US09260552 (1 worldwide citation)

Processes to produce ethylene copolymers using pyridyldiamido transition metal complexes, a chain transfer agent, and an activator are disclosed.


5
Jacob Berlin, Robert H Grubbs, Yann Schrodi, Ian C Stewart: Organometallic ruthenium complexes and related methods for the preparation of tetra-substituted and other hindered olefins. Materia, California Institute of Technology, Nixon Peabody, Jeffrey L Costellia, August 30, 2011: US08008224 (1 worldwide citation)

The invention relates to ruthenium alkylidene complexes having an N-heterocyclic carbene ligand comprising a 5-membered heterocyclic ring having a carbenic carbon atom and at least one nitrogen atom contained within the 5-membered heterocyclic ring, wherein the nitrogen atom is directly attached to ...


6
Ian C Stewart: Dynamic modulation of metallocene catalysts. ExxonMobil Chemical Patents, Catherine L Bell, March 3, 2015: US08969482

This invention relates to a process to alter comonomer distribution in a copolymer (as compared to a copolymer made absent the Lewis base modifier) comprising contacting ethylene and one or more C3 to C40 comonomers; with a catalyst system comprising: 1) a Lewis base modifier; 2) an activator; and 3 ...


7
Ian C Stewart, Steven D Brown, Crisita Carmen H Atienza, David T Harris, Aaron M Hollas: Process of producing polyolefins using metallocene polymerization catalysts and copolymers therefrom. ExxonMobil Chemical Patents, Catherine L Bell, April 4, 2017: US09611348

An ethylene copolymer, a Group 4 transition metal catalyst compound, and methods for polymerization using such a compound, said compound represented by the formula: (L)p(R′)zT(Cp)(A)MX2, where M is a Group 4 metal; z is 0 to 8; p is 1 to 3; X is an anionic leaving group; T is a bridging group; R1 to ...


8
Edward J Blok, Ian C Stewart, David T Harris: Free radical grafting of functionalized resins for tires. ExxonMobil Chemical Patents, Priya G Prasad, August 28, 2018: US10059782

This invention relates to a process for the preparation of a silane-functionalized resin composition comprising the steps of mixing a polymer backbone, a silane, and a free radical initiator; and producing a silane-functionalized resin composition. The polymer backbone is selected from at least one ...


9
David T Harris, Ian C Stewart, Olivier J Georjon, Edward J Blok: Silica treating of functionalized resins in tires. ExxonMobil Chemical Patents, Priya Prasad, August 28, 2018: US10059825

This invention relates to a process for the preparation of a silica-treated functionalized resin composition comprising the steps of reacting a polymer backbone with a hydrosilylation agent to produce a silane-functionalized resin composition, wherein the polymer backbone is selected from at least o ...


10
Ian C Stewart, John R Hagadorn, Mun F Tse, George Rodriguez, Patrick Brant: Functionalized resins obtained via olefin metathesis. ExxonMobil Chemical Patents, Catherine L Bell, March 1, 2016: US09273166

This invention relates to a reaction product obtained by contacting a polymer comprising units derived from dicyclopentadiene with a vinyl terminated macromonomer, a vinyl monomer or a vinylene monomer, in the presence of a metathesis catalyst, where the vinyl monomer or vinylene monomer is represen ...