Exxonmobil Chemical Patents Inc.

Kent Leon Chasey

Periagaram Srinivasan Ravishankar

Narayanaswami R Dharmarajan

Bruce Alan Harrington

George James Pehlert

Bruce Allan Harrington

Rui Zhao

Eric Paul Jourdain

Guy Joseph Wouters

Narayanaswami Raja Dharmarajan

Insulation compounds for medium-voltage power cables and methods for making same are provided. The compound can include a polymer comprising ethylene, one or more C-Calpha olefins and, optionally, one or more dienes, and one or more metal oxides not based on lead or zinc.

Oxides for protection against electrochemical oxidation and ionic contamination in medium-voltage power-cable insulation

The invention relates to a continuous polymerization process for preparing a random ethylene interpolymer which comprises: (A) polymerizing ethylene, and an &#x3b1;-olefin comonomer selected from propylene and/or 1-butene, and mixtures thereof, under continuous random polymerization conditions in the presence of single site catalyst system employing an ionic activator having cyclic ligands shielding a central charge bearing atom, at a temperature of 140&#xb0; C. to 250&#xb0; C. at a conversion of ethylene of 80 to 99% and a comonomer conversion of from at least 20%; and (B) devolatilizing the polymer to provide an ethylene copolymer having a density of from 0.85 to 0.92 g/cm, an MI of from 0.01 to 100 g/10 min and an I/Iof from 30 to 400.

Process for making ethylene interpolymers and interpolymers made thereby, and compositions and electrical devices containing such interpolymers

The invention relates to a continuous polymerization process for preparing a random ethylene interpolymer with propylene and/or 1-butene which comprises:

Process for making ethylene interpolymers and interpolymers made thereby; compositions and electrical devices containing such interpolymers

An insulation compound for a medium-voltage power cable, comprising a polymer comprising ethylene and one or more C-Calpha olefins; and one or more metal sulfides.

Metal sulfides in power-cable insulation

The present disclosure is directed to an electrical device comprising a propylene-alpha olefin polymer, wherein the propylene-alpha olefin polymer comprises from about 5 to about 25 wt % alpha olefin, from about 75 to about 95 wt % propylene and optionally &#x2266;10 wt % diene, wherein the propylene-alpha olefin polymer has a MWD of from about 1 to about 5, a heat of fusion less than or equal to 75 J/g and a T&#x2266;105&#xb0; C.

Propylene elastomers for electrical wire and cable compounds

This invention relates generally to synthetic polymers, generally with improved balance of processability, resilience and durability. These polymers are generally of the ethylene, alpha-olefin, diene terpolymer type.

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Houston, TX, United States of America

Kent Leon Chasey