Dow Global Technolgoies LLC

Univation Technologies, LLC

Dow Global Technologies LLC and Dow Brasil S.a.

Maria Pollard

Kevin Joseph Cann

Sean W Ewart

Shrikant Dhodapkar

Mehmet Demirors

Teresa Plumley Karjala

Mark Gregory Goode

Pradeep Jain

John H Moorhouse

Robert Olds Hagerty

Jorge Caminero Gomes

Nicolas Cardoso Mazzola

F David Hussein

Michael D Awe

Mark Bradley Davis

Ronald Steven Eisinger

Maria A Apecetche

Quan Yuan

Jose Fernando Cevallos-Candau

Alec Y Wang

Michael D Turner

Michael Joseph Zogg, Jr

David A Eversdyk

Jorge Rubalcaba

Matthias Schaefer

Robert D Swindoll

Barbara J Kopp

Steven Strand

Irfan Khan

George W Haun, Jr

Bradley K Blanchard

Martin Lopez

A devolatilizer (devo), which operates at a temperature (T) and at a pressure (P), for the separation of at least a portion of a solvent from a polymer-rich solution comprising the solvent and a polymer, and wherein the devolatilizer comprises at least the following components:

Devolatilizer design

Disclosed herein is a system for solution polymerization comprising a reactor system that is operative to receive a monomer and to react the monomer to form a polymer; a plurality of devolatilization vessels located downstream of the reactor system, where each devolatilization vessel operates at a lower pressure than the preceding devolatilization vessel; and a heat exchanger disposed between two devolatilization vessels and in fluid communication with them, where the heat exchanger has an inlet port temperature of 100&#xb0; C. to 230&#xb0; C., an outlet port temperature of 200&#xb0; C. to 300&#xb0; C., an inlet port pressure of 35 to 250 kgf/cmand an outlet port pressure of 20 to 200 kgf/cm; and wherein the polymer solution remains in a single phase during its residence in the heat exchanger.

Method and system for polymer production

A process for increasing the melt strength of a polyethylene resin comprising a) selecting a polyethylene resin having i) a density, as determined according to ASTM D792, in the range of from 0.865 g/cmto 0.97 g/cm, and ii) a melt index, I, as determined according to ASTM D1238 (2.16 kg, 190&#xb0; C.), in the range of from 0.01 g/10 min to 100 g/10 min; b) reacting from 10 ppm to 1000 ppm of at least one peroxide having a 1 hour half-life decomposition temperature from 160&#xb0; C. to 250&#xb0; C. with the polyethylene resin under conditions sufficient to increase the melt strength of the polyethylene resin is provided. Also provided are a masterbatch composition and a polymeric composition.

Process for increasing the melt strength of a polyethylene resin, a masterbatch composition and a polymeric composition

The invention provides a mixing system comprising the following:

Mixing system comprising an extensional flow mixer

Catalysts and methods for making and using the same are provided. The method for fabricating a catalyst may includes contacting a supported catalyst with a monomer under conditions that reduce an overall charge of the catalyst to less than about 75% of an initial charge of the catalyst. A method for polymerization may include introducing a pre-polymerized catalyst and one or more olefins into a gas phase fluidized bed reactor, operating the reactor at conditions sufficient to produce a polyolefin, wherein the polymerization is carried out in the substantial absence of any continuity additives.

Methods for reducing static charge of a catalyst and methods for using the catalyst to produce polyolefins

The present invention is a film having a thickness greater than 100 microns comprising from 10 to 100 percent by weight of a polyethylene polymer made by the process of a) selecting a target polyethylene resin having a density, as determined according to ASTM D792, in the range of from 0.90 g/cm3 to 0.955 g/cm3, and a melt index, as determined according to ASTM D1238(2.16 kg, 190 C), in the range of from 0.01 g/10 min to 10 g/10 min; b) reacting said target polyethylene with an alkoxy amine derivative in an amount less than 900 parts derivative per million parts by weight of total polyethylene resin under conditions sufficient to increase the melt strength of the target polyethylene resin; and c) forming a thick film from the modified target resin. The present films include those which can achieve similar processability as those containing unmodified linear polyethylene despite having at least 10% less LDPE resins in the formulation.

Thick blown films

Disclosed herein are various methods and systems for gas and liquid phase polymer production. In certain embodiments, the methods comprise manipulating properties of polymers produced by adjusting the hydrogen feed rate.

Systems and methods for fabricating polymers

Growing community of inventors

Pearland, TX, United States of America

Maria Pollard