Abstract: A system for adding a gas to a liquid including a gas over liquid accumulator having an interior volume with a headspace, a liquid level, an accumulator liquid inlet, an accumulator gas inlet, and an accumulator gas outlet connected to the headspace. A contactor having a contactor gas inlet and a contactor gas outlet and a first supply of gas connected to the accumulator gas inlet. A second supply of gas connected to the contactor gas inlet and a supply of liquid connected to the accumulator liquid inlet. A first valve disposed between the first supply of gas and the accumulator gas inlet, a second valve connected to the accumulator gas outlet, a third valve disposed between the supply of liquid and the accumulator liquid inlet, a fourth valve disposed between the contactor gas inlet and the second supply of gas; and a fifth valve connected to the contactor gas outlet.

Abstract: A die comprising two die cavities, with each capable of supplying polymeric material, and a distribution plate interposed between at least a portion of each of the two die cavities. The distribution plate has a dispensing edge and a plurality of extrusion channels. First and second extrusion channels extend from entrance openings at the first and second die cavities, respectively, to exit openings on the dispensing edge. The exit openings of the first and second extrusion channels are disposed in alternating positions along the dispensing edge. A method of extruding with such a die and an extruded article made therefrom are also disclosed. The method includes co-extruding a first polymeric composition and a second polymeric composition. The extruded article comprises a plurality of longitudinal first stripes of the first polymeric composition alternating with a plurality of longitudinal second stripes of the second polymeric composition.

Abstract: A die comprising two die cavities, with each capable of supplying polymeric material, and a distribution plate interposed between at least a portion of each of the two die cavities. The distribution plate has a dispensing edge and a plurality of extrusion channels. First and second extrusion channels extend from entrance openings at the first and second die cavities, respectively, to exit openings on the dispensing edge. The exit openings of the first and second extrusion channels are disposed in alternating positions along the dispensing edge. A method of extruding with such a die and an extruded article made therefrom are also disclosed. The method includes co-extruding a first polymeric composition and a second polymeric composition. The extruded article comprises a plurality of longitudinal first stripes of the first polymeric composition alternating with a plurality of longitudinal second stripes of the second polymeric composition.

Abstract: An extrudable composition comprising a major amount of a thermoplastic host polymer, a fluorocarbon polymer and a dendritic material wherein the extrudate demonstrates reduced levels of surface defects.

Abstract: An extrudable composition comprising a major amount of a thermoplastic host polymer, a fluorocarbon polymer and a dendritic material wherein the extrudate demonstrates reduced levels of surface defects.

Abstract: This disclosure relates to an improved furnace process for preparing carbon blacks, especially semi-reinforcing furnace blacks, by the incomplete combustion of hydrocarbonaceous feedstocks wherein the structure characteristics of the resultant blacks are lowered without significantly increasing the particle size of the blacks.