Dow Global Technolgoies LLC

The Dow Chemical Company

Martin C Cornell

Christopher P Christenson

Ralph D Priester, Jr

Alan K Schrock

Robert E O'Neill

Wayne R Willkom

Kyung W Suh

Chung Poo Park

Martin H Tusim

David H West

Sten A Wallin

Robin Paul Ziebarth

Robert Carswell

Ricky L Tabor

James R Porter

Cheng G Li

Henri J M Gruenbauer

Melissa J Zawisza

Cynthia K Groseth

Steven B Swartzmiller

Zoran R Jovanovic

Steven B Swatzmiller

An improved Diesel exhaust filter element of the type having a rigid porous wall portion formed of an acicular ceramic (such as acicular mullite), the porous wall portion having a first side and a second side, the porous wall portion being coated with a precious metal catalyst and a Noabsorbent, such that when exhaust gas from a Diesel engine is flowed through the rigid porous wall from the first side to the second side, the exhaust gas containing excess oxygen, Nox and soot, the soot in the exhaust gas in trapped within the rigid porous wall and catalytically oxidized to carbon dioxide, the NO is catalytically oxidized to NO, which NOis then absorbed by the Noabsorbent, and such that when the exhaust gas is caused to contain excess hydrocarbon and carbon monoxide, then the Noabsorbent is regenerated and the remaining hydrocarbon and carbon monoxide are catalytically converted to nitrogen and carbon dioxide. In addition, a process for depositing precipitated metal ions on the surfaces of such a rigid porous wall.

Diesel exhaust filter

A polyurethane-polymer composition suitable for preparing a lightweight tire support includes at least one isocyanate, at least one polyol, and at least one chain extender. A polyurethane-polymer composition can also include an additive such as a catalyst, a filler, a surfactant, a colorant, and a mold-release agent. A lightweight tire support can be prepared from a polyurethane-polymer composition by, for example, reaction injection molding. Such a tire support desirably has temperature stability and load-bearing capability.

Lightweight tire support and composition and method for making a tire support

The invention is a catalytic device comprised of a catalyst support of fused ceramic grains and a catalyst that is surface-bound to at least a portion of the ceramic grains, incorporated into at least a portion of the ceramic grains or combinations thereof, wherein the grains and catalyst form a surface structure that has a box counting dimension of greater than 1.00 or the box counting dimension has at least one step change when measured from a box size 'd' of at least about 1 micrometer to at most about 1 millimeter. The invention is particularly useful in making a catalytic converter or catalytic converter-soot trap.

Catalytic devices and method of making said devices

Polyurethane/polyurea polymers can be electrostatically painted without first being coated with a conductive primer. Disclosed is an improvement in a process for electrostatically painting polyurethane/polyurea polymers, the improvement being to prepare the polymer from a formulation including a non-volatile metal salt conductivity inducing material. The polymers of the present invention can be charged with sufficient charge density to permit efficient paint transfer to the polymer surface. Also disclosed is a composition of at least two adjacent layers, one layer being an outer layer of electrostatically applied paint, and the other an inner layer of polyurethane/polyurea polymer.

Electrostatically painted polymers and a process for making same

A process for making a polymer foam sheet, which comprises (i) extruding through an annular extrusion die a foamable composition comprising at least one polypropylene polymer and at least one blowing agent, at a pressure, temperature, and extrusion rate sufficient to prevent foaming of the composition prior to exiting the die, under conditions sufficient to form a foam tube having a density of at least 16 kg/m,and no greater than 200 kg/m,, an open cell content of less than 70 percent, a circumference of at least 1 meter, and a foam thickness of at least 2 mm and no greater than 25 mm, wherein the blowing agent is used in an amount of from 0.2 to 4.5 moles per kg of polymer, (ii) allowing the foam to cool to a temperature below the melt temperature of the polypropylene, and (iii) cutting the tube of foam along its radius to form a foam sheet, wherein at least 70 percent by weight of the polymer in such sheet is a polypropylene having a melt strength in the range of from 25 to 60 cN when measured at 190&deg; C.

Method of forming a thermoformable polypropylene foam sheet

An energy absorbing article having a direction in which impact resistance is desired is formed of extruded thermoplastic foam exhibit anisotropic compressive strength. The extrusion direction of the thermoplastic foam is aligned substantially parallel with the direction in which impact resistance is desired to provide an energy absorbing article exhibiting a high ratio of compressive strength to weight.

Energy absorbing articles of extruded thermoplastic foams

Growing community of inventors

Lake Jackson, TX, United States of America

Martin C Cornell