Dow Global Technolgoies LLC

Rohm and Haas Company

Rohm and Haas Chemicals LLC

Eung Kyu Kim

Mark Alan Barger

Qi Jiang

Brian W Walther

Charles F Diehl

William J Harris

Michael Damian Bowe

Xin Jiang

Jianhai Mu

Daniel A Beaudoin

Anthony Charles Neubauer

Ronald B Leng

Michael D Read

Hua Ren

Laura J Dietsche

Kaoru Ohba

Jin Zhao

Thomas J Parsons

Janah Cecelia Szewczyk

Calvin Lee Pavlicek

Kevin R Hughes

Thomas J Styranec

Anthony Neubauer

Calvin Pavlicek

The process for synthesizing a poly(amic acid) polymer or a polyimide polymer is improved by using a solvent system consisting essentially of:

DMPA-based solvent systems for the synthesis of poly (amic acid) and polyimide polymers

Brominated organic polymer solutions from a bromination reaction are devolatilized in a devolatilizing extruder. A starting organic polymer is brominated in solution to form a brominated polymer solution. This solution is combined with a second thermoplastic polymer to form a concentrated solution. The solvent and other volatile compounds are removed from the concentrated solution in a devolatilizing extruder to form a devolatilized polymer blend.

Melt devolatilization extrusion processs

A dispensing device () capable of dispensing both frothed and non-frothed liquids, the dispensing device having in order a fluid transport medium () defining a flow channel (), a trigger controlled liquid flow regulator () defining a flow channel () through which fluid may flow when the trigger () is in one position but not when the trigger is in another position, a flow block () defining a flow channel () in fluid communication with a gas channel () and removably attached to the flow regulator, a flow restriction orifice () between the flow block and the flow regulator (), a mixing block () defining a flow channel () containing mixing elements and optionally stabilization () and extension blocks each containing a flow channel () wherein each flow channel is in fluid communication with one another.

Dispensing device for both froth and non-froth coatings

Thermally sensitive polymers containing polymerizable carbon-carbon unsaturation and/or aliphatically bound halogen are devolatilized in a devolatilizing extruder. The thermally sensitive polymer is blended with a second polymer, which does not contain polymerizable carbon-carbon unsaturation or more than 5% by weight aliphatically bound halogen, and which has a molecular weight of from 25,000 to 175,000. The blend is then devolatilized in the extruder to produce a devolatilized polymer blend. Thermal degradation of the thermally sensitive polymer is minimized in this process.

Melt devolatilization extrusion process

A reactive extrusion process for producing an ionomer is disclosed. The process comprising adding a polymer containing a carboxyl functionality to an extruder, then homogenously melting the polymer in a melting zone of the extruder. A first melt seal zone of the extruder is formed to separate the melting zone from an injection zone where an aqueous solution of metallic ions are added to the molten polymer. The first melt seal zone is formed by increasing the pressure in the melt seal zone to a pressure which is higher than the vapor pressure of the water at any point in the injection zone and the reaction zone. The aqueous solution of metallic ions is then mixed with the polymer containing the carboxyl functionality in a reaction zone of the extruder under conditions such that the metallic ions are substantially reacted with the carboxyl functionality. A pressure build-up zone is formed in the extruder, wherein the pressure build-up zone is located no earlier than at the end of the reaction zone wherein the pressure build-up zone is formed by increasing the pressure to a level such that the aqueous solution of metallic ions remains in the liquid phase for a time sufficient to allow for the desired reaction between the metallic ions and the carboxyl functionality of the polymer.

Process for producing high quality ionomers

The invention includes a process for providing a coupled propylene polymer foam. The invention also includes any composition comprising a product formed by the process of the invention and any article formed from such a composition.

Propylene polymer coupling and foams

Growing community of inventors

Midland, MI, United States of America

Eung Kyu Kim