Exxonmobil Chemical Patents Inc.

Celanese International Corporation

Michael J Goncy

Antonios K Doufas

Krishnan Anantha Narayana Iyer

Sunny Jacob

Eric Paul Jourdain

Kelly Kirkendall

Katya N Reyna

Bruce R Lundmark

Oscar Oansuk Chung

Gregory K Hall

Andrew Takacs

Tonson Abraham

Christopher A Stafford

Peter D Hartwell

Leander M Kenens

Wanli Wang

In an embodiment, a thermoplastic vulcanizate (TPV) composition is provided. The TPV composition includes a thermoplastic polyolefin; and an ethylene based copolymer rubber, wherein the ethylene based copolymer rubber has: a Mw of from 500,000 g/mol to 3,000,000 g/mol, a Mw/Mn of 4.0 or lower, and a g′of 0.90 or greater. In another embodiment, a TPV composition includes a thermoplastic phase and an ethylene-propylene-diene terpolymer, wherein the thermoplastic vulcanizate composition has: a hardness of from 20 Shore A to 60 Shore D; and a stress relaxation slope of −1 to −5 (l/min) as measured by an Elastocon stress relaxation instrument.

Thermoplastic vulcanizate compositions

A flexible conduit used for transportation of hydrocarbon fluids for off-shore and on-shore oil and gas applications includes an inner pressure sheath, at least one reinforcing layer at least partially disposed around the pressure sheath, an outer protective sheath at least partially disposed around the at least one reinforcing layer, and optionally a thermally insulating layer disposed between the at least one reinforcing layer and the outer protective sheath. At least one of the inner pressure sheath, outer protective sheath, and the thermally insulating layer is manufactured using a thermoplastic blend (TPB) composition. The TPB compositions disclosed herein are useful for the formation of at least one polymer layer of the thermoplastic umbilical hoses used for transportation of hydrocarbon fluids.

Thermoplastic blends and composites for flexible pipes

Disclosed is a thermoplastic vulcanizate composition with a dispersed phase of a rubber, partially cured in a phenolic resin curing agent, and a continuous thermoplastic phase including at least one thermoplastic polymer, where the composition has one or more of the following properties: (i) an epoxidized soy bean oil is added after the partial curing of the rubber phase; (ii) a combination of an alkyl radical scavenger and an alkyl phosphite is added during the partial curing of the rubber phase; (iii) the thermoplastic phase has &#x2265;10 wt % polypropylene having a heat of fusion &#x3e;80 J/g, and the composition includes (a) stannous chloride; (b) a non-basic hindered amine light stabilizer; and/or (c) both (a) and (b); and (iv) where (i) to (iii) include carbon black in the composition.

Thermoplastic vulcanizates and compositions thereof

In an embodiment, a thermoplastic vulcanizate (TPV) composition is provided. The TPV composition includes a thermoplastic polyolefin; and an ethylene based copolymer rubber, wherein the ethylene based copolymer rubber has: a Mw of from 500,000 g/mol to 3,000,000 g/mol, a Mw/Mn of 4.0 or lower, and a g'of 0.90 or greater. In another embodiment, a TPV composition includes a thermoplastic phase and an ethylene-propylene-diene terpolymer, wherein the thermoplastic vulcanizate composition has: a hardness of from 20 Shore A to 60 Shore D; and a stress relaxation slope of &#x2212;1 to &#x2212;5 (1/min) as measured by an Elastocon stress relaxation instrument.

A masterbatch for use in the production of thermoplastic vulcanizates comprises stannous chloride powder and zinc oxide powder encapsulated together in a polymer, such as an ethylene propylene diene terpolymer.

Use of masterbatches in the production of thermoplastic vulcanizates

Provided herein is a process for making a grafted cross-linked polymer blend, by polymerizing a first and second polymer solution (each having 75 to 99 wt % propylene-derived units, 1 to 25 wt % ethylene-derived units, and 0.05 to 6 wt % diene-derived units); combining the first and second polymer solution to produce a polymer blend solution; removing solvent from the polymer blend solution to produce a polymer blend; mixing the polymer blend with a coagent and a vinyl-terminated silane compound; subjecting the polymer blend to electron beam irradiation to grafting the vinyl-terminated silane compound to either or both of the first polymer and the second polymer to form a grafted polymer blend; and moisture curing the grafted polymer blend to form a grafted cross-linked polymer blend, wherein the grafted cross-linked polymer blend is substantially free of peroxide.

Process of making crosslinked polyolefin polymer blends and compositions prepared thereof

A method for forming a composition comprising a propylene-based polymer and a co-agent is provided. The method comprises introducing a propylene-based polymer to an extruder and introducing the co-agent to the extruder at a position within the extruder where the temperature is from 23&#xb0; C. to 125&#xb0; C.

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Mont Belvieu, TX, United States of America

Michael J Goncy