Union Carbide Chemicals & Plastics Technology Corporation

James A Condron

Alex C Kuo

Kenneth L Hoy

Kenneth A Nielsen

Chinsoo Stephen Lee

Richard A Engelman

Edmond J Derderian

Alan E Wang

The present invention is directed to methods and apparatus for effectively proportioning a mixture of compressible and non-compressible fluids, wherein the resulting mixture has an almost constant density. The present invention is particularly useful for admixing supercritical fluids with polymeric coating compositions for various spray applications.

Method and apparatus for proportioning and mixing non-compressible and

The present invention is directed to methods and apparatus for effectively proportionating a mixture of compressible and non-compressible fluids and in particular, the present invention is directed to apparatus and methods for forming a coating composition mixture containing a substantially accurate proportionated amount of at least one supercritical fluid used as a viscosity reduction diluent.

Method and apparatus for metering and mixing non-compressible and

Methods and apparatus are disclosed for forming a liquid spray mixture containing accurately proportionated amounts of viscous coating concentrate and compressed fluid diluent such as carbon dioxide. The proportionation is accomplished by passing the fluid diluent through two sets of flow restrictors under the same pressure drops to form two proportioned flows of diluent. One diluent flow is converted by volumetric displacement to an equal flow of liquid concentrate, which is mixed with the other diluent flow to form the liquid spray mixture.

Methods and apparatus for preparing mixtures with compressed fluids

A process for delivering a predetermined ratio of a compressible fluid and a non-compressible fluid which comprises the measurement of only the flowrate of the compressible fluid, the activation of an air-driven positive displacement pump at appropriate times, the pumping of a non-compressible fluid with the air-driven pump, mixing the supercritical fluid and non-compressible fluid and depositing the mixture onto a substrate.

Supercritical ratio control system utilizing a sonic flow venturi and an

The present invention is directed to apparatus and methods for effectively supplying, feeding, measuring, proportioning, mixing, pressurizing, and heating on a semi-continuous basis, a plurality of fluids. Preferably, the fluids comprise at least one substantially non-compressible fluid, such as coating formulation, and at least one substantially compressible fluid, such as carbon dioxide, to form a substantially accurately proportionated coating admixture in the supercritical state of the compressible fluid for spraying the combined mixture through a spraying means onto a substrate to produce a coating. The process employs vessels having a known displacement volume to feed and proportion the fluids. The pressurization, mixing and heating is accomplished in an oscillation loop wherein the mixture is pressurized and heated while in such oscillation loop. A spray gun connected to the oscillation loop is used to spray the mixture.

Semi-continuous method and apparatus for forming a heated and

The present invention is directed to improved methods and apparatus for adding one or more fluids to another while substantially preventing the precipitation of one or more dissolved solids contained within a first fluid when being added to a second fluid containing at least one non-solvent component for the one or more dissolved solids.

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Hurricane, WV, United States of America

James A Condron