Exxonmobil Chemical Patents Inc.

JoAnn M Canich

Matthew William Holtcamp

Sudhin Datta

John Robert Hagadorn

Margaret M Wu

Mun Fu Tse

Liehpao O Farng

Aspy Keki Mehta

Rainer Kolb

Eric Bart Sirota

Manika Varma-Nair

Charles James Ruff

Thomas T Sun

Vera Minak-Bernero

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

This invention relates to methods for producing an alkene terminated polystyrene, including: contacting a styrenic block copolymer and an alkene in the presence of a metathesis catalyst under conditions sufficient to produce an alkene terminated polystyrene having an unsaturation functionality of at least 0.7 and a MWD of about 1.5 or less. Methods for producing functionalized polymers and polyethylene blend composition comprising these functionalized polymers are also disclosed.

Polyolefin compositions and methods of production thereof

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Houston, TX, United States of America

JoAnn M Canich