Exxonmobil Chemical Patents Inc.

Daniel L Bilbao

Jo Ann M Canich

Mun Fu Tse

Ian C Stewart

Charles James Ruff

Carlos U DeGracia

Jeffrey Lawrence Brinen

Christopher Garland Bauch

Kevin Wayne Lawson

Todd S Edwards

Blu E Englehorn

Carlos U De Gracia

Henry Dong

Disclosed is a method of reducing and/or regulating the level of hydrogen in a polymerization reactor comprising contacting a first feed comprising a first amount of hydrogen with a hydrogenation catalyst prior to entering a polymerization reactor to form a second feed; then contacting the second feed having a second amount of hydrogen with monomers and a polymerization catalyst in a polymerization reactor to form a polymer. The first and second feeds may reside in a feed line from one reactor to another, a monomer feed line to the reactor, or in a recycle line to and from the same reactor.

Method of regulating hydrogen to a polymerization reactor

This invention relates to methods to prepare and compositions pertaining to branched ethylene-propylene copolymers that include at least 50% ethylene content by weight as determined by FTIR; a g'of less than 0.95; a Mof 125,000 to 300,000; a methylene sequence length of 6 or greater as determined byC NMR, wherein the percentage of sequences of the length of 6 or greater is more than 32%; and can have greater than 50% vinyl chain end functionality.

Ethylene-propylene copolymeric compositions with long methylene sequence lengths

This invention relates to a copolymer prepared using two or more non-coordinating anion activators comprising a first C2 to C12 alpha olefin (such as ethylene), a second C3 to C12 alpha olefin (such as propylene) different from the first alpha olefin, and diene (such as ethylidene norbornene and/or vinyl norbornene), where the polymer has: a) first alpha olefin (ethylene) content of 35 to 90 mol %; b) second alpha olefin (propylene) content of 9.8 to 64.8 mol %; c) diene content of 0.2 to 5 mol %; d) a branching index g'ave of 0.95 or more; e) a complex viscosity ratio (eta*(0.01 rad/s)/eta*(100 rad/s), at 125&#xb0; C.) greater than 1.1*Y, where Y=Y+{[(Y&#x2212;Y)/(X&#x2212;X)](X&#x2212;X)}, where Xis the wt % of a first non-coordinating anion activator, NCA, used to prepare the copolymer (based upon weight of NCAand a second non-coordinating anion activator, NCA, used to prepare the copolymer), X=0, X=100, Y=complex viscosity ratio of polymer made with 100% NCAand 0% NCA, Yis complex viscosity ratio of polymer made with 100% NCAand 0% NCA, where NCAhas an Mw lower than the Mw of NCA; f) an Mw/Mn of 4.0 or less; g) a melting point of 30&#xb0; C. or less; and h) a Composition Distribution Breadth Index of 50% or more.

Process to produce ethylene propylene copolymers

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Houston, TX, United States of America

Daniel L Bilbao