Exxonmobil Chemical Patents Inc.

Douglas A Berti

Periagaram Srinivasan Ravishankar

Yu Feng Wang

Florin Barsan

Chris B Friedersdorf

Luke P Stephens

Christopher B Friedersdorf

Patrick S Byrne

Trevan D MacArthur

David R Johnsrud

A blended multimodal polymer product is disclosed that comprises a first polymer, wherein the first polymer is a homopolymer of propylene or a propylene copolymer having an ethylene or a Cto Colefin comonomer; and a second polymer, wherein the second polymer is a propylene homopolymer and a propylene copolymer having an ethylene or a Cto Colefin comonomer, and wherein the first polymer and second polymer have a difference in heat of fusion of about 25 J/g or more. Methods for making such a polymer product using at least two reactors in parallel and for separating a propylene-based polymer from a solvent using a liquid-phase separator are also disclosed.

Polyolefin adhesive compositions and methods of preparing the same

Polyolefin adhesive compositions and methods for preparing the same

This invention relates to a blocked process for producing polymers of high and low molecular weights utilizing the same polymer separator. The separator is operated in a different mode depending on the molecular weight of the polymer being produced such that the separation system is operated in flash mode for the separation of low molecular weight polymers and operated in lower critical solution temperature (LCST) mode for the separation of high molecular weight polymers.

Processes and apparatus for continuous solution polymerization

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Houston, TX, United States of America

Douglas A Berti