Union Carbide Chemicals & Plastics Technology Corporation

Alex C Kuo

James A Condron

Kenneth L Hoy

Kenneth A Nielsen

Jeffrey J Lear

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 are presented by which compressed fluids such as carbon dioxide, nitrous oxide, and ethane can be admixed with solvent-borne compositions that contain a high concentration of solid polymer, such as coating compositions, whereby precipitation of the solid polymer can be avoided, thereby preventing plugging of the mixing apparatus.

Methods for admixing compressed fluids with solvent-borne compositions

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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Charleston, WV, United States of America

Alex C Kuo