Exxonmobil Chemical Patents Inc.

Celanese International Corporation

Florin Barsan

Jo Ann M Canich

John Robert Hagadorn

Rhutesh K Shah

Sarah J Mattler

Periagaram Srinivasan Ravishankar

Yu Feng Wang

Zhifeng Bai

Chase A Eckert

Luke P Stephens

Douglas A Berti

Gabor Kiss

Rainer Kolb

David John Lohse

George Rodriguez

Charles J Harlan

Michael F McDonald, Jr

Richard Vicari

Robert Patrick Reynolds, Jr

Aaron Sattler

John Patrick Soisson

Bret F Hann

Guy Joseph Wouters

Aaron H Reed

Christopher B Friedersdorf

Danica L Nguyen

Aakriti Jain

Kyle B Hancock

The present disclosure provides methods for producing an olefin polymer by contacting a C-Colefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C-Colefin-ethylene-diene terpolymer typically comprising from 1 to 35 mol % of ethylene, from 98.9 to 65 mol % C-Colefin, and, optionally, from 0.1 to 10 mol % diene. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.

Processes for producing high propylene content PEDM using tetrahydroindacenyl catalyst systems

The present disclosure provides methods for producing an olefin polymer by contacting a C-Colefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C-Colefin-ethylene-diene terpolymer typically comprising from 30 to 55 mol % ethylene, from 69.09 to 45 mol % Cto Ccomonomer, and from 0.01 to 7 mol % diene wherein the Tg of the terpolymer is &#x2212;28&#xb0; C. or less. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.

Processes for producing high propylene content PEDM having low glass transition temperatures using tetrahydroindacenyl catalyst systems

A method for making a polymer, having the steps of (a) polymerizing one or more monomers in the presence of a solvent and a catalyst to form a reaction product; (b) removing an effluent from the reaction product, where the effluent comprises an active catalyst and one or more unreacted monomers; (c) combining a quench, comprising carbon dioxide, with the effluent to form a quenched polymer stream, having a carboxyl metal complex; and (d) recovering a polymer from the quenched polymer stream.

Carbon dioxide as a catalyst quench agent in solution polymerization, and products made therefrom

The present disclosure provides methods for producing an olefin polymer by contacting a C-Colefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C-Colefin-ethylene-diene terpolymer typically comprising from 1 to 35 mol % of ethylene, from 98.9 to 65 mol % C3-Colefin, and, optionally, from 0.1 to 10 mol % diene. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.

Branched ethylene-propylene-diene elastomers (bEPDM) and processes for making the bEPDM's comprising combining a catalyst precursor and an activator at a temperature within a range from 90&#xb0; C. to 160&#xb0; C. with ethylene, a C3 to C12 &#x3b1;-olefin, a non-conjugated diene, and a dual-polymerizable diene, where the catalyst precursor is a metallocene catalyst precursor, preferably according to one of various structures including any two ligands selected from cyclopentadienyl ligands and ligands isolobal to the cyclopentadienyl group.

Process for making branched EPDM and the EPDM therefrom

The invention relates to purification of plasticizer, particularly for use in a polymer production process and plant. More particularly, the invention relates to purification of plasticizer, such as by gas stripping, for use in a process for in-line blending of polymer and plasticizer.

Purification of plasticizer and use thereof in a polymer production process and plant

This disclosure relates to a process for polymerization, and in particular to minimizing undesired polymerization reactions downstream of a polymerization reaction zone, for instance by use of a quenching agent that enables fast reaction rates with active polymerization catalyst in the polymerization effluent, so as to quench the catalyst quickly, thereby preventing uncontrolled polymerization reactions. A preferred quenching agent is methanol. Also provided are means for treating polymer recycle streams containing oxygenates, which may result from the use of such quench agents, particularly in polymerization processes including polyene (e.g., diene) monomers.

Mitigation of catalyst inhibition in olefin polymerization

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

Disclosed herein is a process to produce a film comprising poly(vinyl alcohol), wherein the poly(vinyl alcohol) solution has been purified utilizing an ion exchange resin. An approximate 50 micrometer thick film produced from the purified aqueous poly(vinyl alcohol) solution has an APHA color value of 50 or less after the film has been heated at 150&#xb0; C. for 60 minutes.

Method to purify poly(vinyl alcohol)

Growing community of inventors

Pearland, TX, United States of America

Florin Barsan