Exxonmobil Chemical Patents Inc.

Exxonmobil Research and Engineering Company

Vera Minak-Bernero

Sudhin Datta

Liehpao O Farng

Rainer Kolb

Eric Bart Sirota

Mun Fu Tse

Thomas T Sun

Manika Varma-Nair

Andy Haishung Tsou

Jo Ann Marie Canich

Charles Lambert Baker, Jr

Alan Mark Schilowitz

Marc-Andre Poirier

Jason Zhisheng Gao

James William Gleeson

Peter Calcavecchio

Charles L Baker

Nikos Hadjichristidis

Diana S Smirnova

Martin N Webster

Marc-André Poirier

Mun-Fu Tse

JoAnn M Canich

Dorothy Wong, Legal Representative

Chung-Lai Wong

Nicholas Anthony Hilder

Liehpao Oscar Farng

Nick A Hilder

Diana Smirnova

Jo Ann Canich

Provided are ethylene-based copolymers, methods of preparing the same, lubricating oil compositions including the same, methods for preparing such lubricating oil compositions, and end uses for such ethylene-based copolymers and lubricating oil compositions. The ethylene-based copolymers may include from about 35 wt. % to about 60 wt. % of units derived from ethylene and at least 1.0 wt. % of one or more alpha-olefin comonomers having 3 to 20 carbon atoms. The ethylene-based copolymers are substantially amorphous and have a polydispersity index of about 2.8 or less.

Ethylene-based copolymers, lubricating oil compositions containing the same, and methods for making them

Disclosed are rheology modifiers comprising compositionally disperse polymeric compositions and/or crystallinity disperse polymeric compositions that may be useful in modifying the rheological properties of lubrication fluids, and methods for making such compositions. The compositionally disperse polymeric composition are formed from at least two discrete compositions of ethylene copolymers. The crystallinity disperse polymeric composition are formed from ethylene copolymers having at least two discrete values of residual crystallinity.

Polymeric compositions useful as rheology modifiers and methods for making such compositions

Polymeric compositions and methods for making and using the same are provided. The polymeric composition can include a first ethylene-based copolymer and a second ethylene-based copolymer. The first ethylene-based copolymer can have a weight percent of ethylene-derived units based on a weight of the polymeric composition (E) ranging from about 35 wt % to about 52 wt % and a weight-average molecular weight (Mw) of less than or equal to 130,000. The second ethylene-based copolymer can have a weight percent of ethylene-derived units based on the weight of the polymeric composition (E) ranging from about 65 wt % to about 85 wt % and a weight-average molecular weight (Mw) of less than 130,000.

Ethylene based copolymer compositions as viscosity modifiers and methods for making them

Provided is a method for stabilizing a dispersion of a carbon nanomaterial in a lubricating oil basestock. The method includes providing a lubricating oil basestock; dispersing a carbon nanomaterial in the lubricating oil basestock; and adding at least one block copolymer thereto. The at least one block copolymer has two or more blocks includes at least one alkenylbenzene block and at least one linear alpha olefin block. The at least one block copolymer is present in an amount sufficient to stabilize the dispersion of the carbon nanomaterial in the lubricating oil basestock. Also provided is a lubricating engine oil having a composition including: a lubricating oil base stock; a carbon nanomaterial dispersed in the lubricating oil basestock; and at least one block copolymer.

Lubricant compositions and processes for preparing same

Provided are ethylene-based copolymers, methods of preparing the same, lubricating oil compositions including the same, methods for preparing such lubricating oil compositions, and end uses for such ethylene-based copolymers and lubricating oil compositions. The ethylene-based copolymers may include less than about 80 wt. % of units derived from ethylene and one or more alpha-olefin comonomers having 3 to 20 carbon atoms. The ethylene-based copolymers have a melting peak (Tm), as measured by DSC, of 80&#xb0; C. or less, and a polydispersity index of about 2.8 or less. In some embodiments, the ethylene-based copolymers have an intramolecular composition distribution of about 50 wt. % or less and/or an intermolecular composition distribution of about 50 wt. % or less.

Haze formation in heavy Gas-to-Liquids (GTL) base stock is mitigated by the addition to said GTL base stock of one or more particular additives.

Method for haze mitigation and filterability improvement for gas-to-liquid hydroisomerized base stocks

The present invention relates to a method of dispensing accurately small amounts of high viscosity lubricant components using tubeless positive-displacement liquid-handling equipment for forming lubricant blends. The method includes the steps of: providing a low void volume positive displacement pipette with a tapered tip for each lubricant component contained within a lubricant additive reservoir, and one or more lubricant blend containers; ingesting into a low void volume positive displacement pipette from a lubricant additive reservoir an ingestion volume of a lubricant component; moving the low void volume positive displacement pipette from the lubricant additive reservoir to the one or more lubricant blend containers; ejecting into the one or more lubricant blend containers an ejection volume of the lubricant component from the low void volume positive displacement pipette; returning the low void volume positive displacement pipette from the one or more lubricant blend containers to the additive reservoir; and repeating these steps for each additional lubricant component. The advantages of the method of the present invention include improved dispensing accuracy, quicker dispensing, lower shear rate during dispensing, lower temperature for dispensing, less residual additive on the tip of the device after dispensing, and the ability to real time monitor density and mass during dispensing. The method finds application in laboratory test environments, and in particular in high throughput testing environments.

Method of blending lubricants using positive displacement liquid-handling equipment

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Bridgewater, NJ, United States of America

Vera Minak-Bernero