Abstract: 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.
Type:
Grant
Filed:
December 18, 1992
Date of Patent:
May 17, 1994
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Kenneth A. Nielsen, Jeffrey J. Lear, John N. Argyropoulos, Alex Chia-Huei Kuo
Abstract: The application contains subject matter related to cleaning mixtures and methods for using such cleaning mixtures to clean apparatus which contain one or more polymeric compounds wherein said cleaning mixture is comprised of at least one compressed fluid and at least one active solvent in which said at least one or more polymeric compounds are at least partially soluble and which is at least partially miscible with the at least one compressed fluid, said compressed fluid being a gas at standard conditions of 0.degree. C. and one atmosphere (STP), which cleaning mixture is in one phase and at a pressure at which the cleaning mixture is substantially near its two phase region.
Type:
Grant
Filed:
April 27, 1992
Date of Patent:
April 26, 1994
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Abstract: 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.
Type:
Grant
Filed:
June 30, 1992
Date of Patent:
April 19, 1994
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
James A. Condron, Edmond J. Derderian, Alan E. Wang
Abstract: A method and apparatus are provided for spraying a solvent-borne composition with reduced emission of organic solvents by exchanging a portion of the organic solvent diluent with a compressed fluid such as carbon dioxide, by adding the compressed fluid under pressure to maintain low viscosity and to facilitate solvent separation, separating a portion of the organic solvent, and spraying the resulting composition with compressed fluid.
Type:
Grant
Filed:
December 18, 1992
Date of Patent:
March 1, 1994
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Abstract: Methods are presented by which polymeric compositions, such as coating compositions, can be sprayed with compressed fluids, such as carbon dioxide, nitrous oxide, or ethane, at higher solids levels and with finer atomization to give improved spray application quality with reduced emission of solvent.
Type:
Grant
Filed:
December 18, 1992
Date of Patent:
March 1, 1994
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Kenneth A. Nielsen, David C. Busby, Marc D. Donohue, Charles W. Glancy
Abstract: The present invention relates to copolymers which are particularly suitable in coating compositions which are sprayed with compressed fluids which act as viscosity reducing diluents.
Type:
Grant
Filed:
October 19, 1992
Date of Patent:
March 1, 1994
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Abstract: This invention relates to a method and system for proportionating, mixing, pressurizing, heating and supplying a coating formulation, wherein a microporous membrane injector/mixer located in the relevant section of the system so that undesirable precipitation of solid polymer from the coating formulation is subsequently avoided.
Type:
Grant
Filed:
May 12, 1992
Date of Patent:
October 19, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Kenneth A. Nielsen, Jeffrey D. Goad, Lise Dahuron
Abstract: Acrolein is prepared by the heating of 3,4-dihydro-2H-pyran-2-carboxaldehyde. The process provides acrolein in very high yields and with few impurities. The process is advantageously employed to produce acrolein at the point of use.
Type:
Grant
Filed:
September 22, 1992
Date of Patent:
September 7, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Abstract: Methods and apparatus for economically and effectively using a portion of a liquified compressed gas feedstock, such as liquid carbon dioxide, as a refrigerant to cool said liquified compressed gas feedstock so as to prevent cavitation and liquid compressibility when pumping such feedstock are disclosed.
Type:
Grant
Filed:
September 30, 1991
Date of Patent:
June 1, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Abstract: Novel oxydiketones having the general structure: ##STR1## with R being alkyl groups of up to 12 carbons atoms and derivatives thereof having utility in the manufacture of various polymers and a process for their preparation are described.
Type:
Grant
Filed:
June 11, 1992
Date of Patent:
April 27, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Ronald S. Newman, St. Clair W. Greenidge
Abstract: A liquid coatings application process and apparatus is provided in which supercritical fluids, such as supercritical carbon dioxide fluid, are used to reduce to application consistency viscous coatings compositions to allow for their application as liquid sprays. The coatings compositions are sprayed by passing the composition under pressure through an orifice into the environment of the substrate.
Type:
Grant
Filed:
September 10, 1991
Date of Patent:
April 20, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Kenneth L. Hoy, Kenneth A. Nielsen, Chinsoo Lee
Abstract: The processes for oxidation of propylene to acrolein and the oxidation of propylene to acrylic acid in two stages with acrolein as an intermediate are improved by use of essentially inert essentially anhydrous diluent gases to replace steam in the reaction streams. In particular, the use of essentially inert essentially anhydrous diluents which raise the composite heat capacity of the diluent gaas mixture to at least about 6.5 calories/(gram-mole) (.degree.C.) will improve selectivity to desired products and will reduce both the waste water load on the system and by-product formation.
Type:
Grant
Filed:
June 25, 1990
Date of Patent:
March 30, 1993
Assignees:
Union Carbide Chemicals, Plastics Technology Corporation
Inventors:
William G. Etzkorn, Gordon G. Harkreader
Abstract: The invention relates to method and small batch, portable apparatus and article for heating, pressurizing and continuously mixing two fluids, preferably at least one compressible fluid and one non-compressible fluid in a single vessel to form a mixture of such fluids.
Type:
Grant
Filed:
December 24, 1991
Date of Patent:
March 2, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Donald J. Dickson, Marcelo J. Marchetti
Abstract: The process for oxidation of propylene to acrolein and the oxidation of propylene to acrylic acid in two stages with acrolein as an intermediate are improved by use of essentially inert essentially anhydrous diluent gases to replace steam in the reaction streams. In particular, the use of essentially inert essentially anhydrous diluents which raise the composite heat capacity of the diluent gas mixture to at least about 6.5 calories/(gram-mole) (.degree.C.) will improve selectively to desired products and will reduce both the waste water load on the system and by-product formation. Reduction in second-stage catalyst efficiency is compensated for by introducing steam to the feed to the second-stage, and/or by increasing the operating temperature of the second-stage, and/or by increasing the active surface area of the second-stage catalyst.
Type:
Grant
Filed:
October 25, 1991
Date of Patent:
February 2, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
William G. Etzkorn, Gordon G. Harkreader
Abstract: The processes for oxidation of isobutylene to methacrolein and the oxidation of isobutylene to methacrylic acid in two stages with methacrolein as an intermediate are improved by use of essentially inert essentially anhydrous diluent gases to replace steam in the reaction streams. In particular, the uses of essentially inert essentially anhydrous diluents which raise the composite heat capacity of the diluent gas mixture to at least about 6.5 calories/(gram-mole) (.degree.C.) will improve selectivity to desired products and will reduce both the waste water load on the system and by-product formation.
Type:
Grant
Filed:
October 23, 1991
Date of Patent:
October 13, 1992
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
William G. Etzkorn, Gordon G. Harkreader
Abstract: Novel oxydiketones having the general structure: ##STR1## with R being alkyl groups of up to 12 carbon atoms and derivatives thereof having utility in the manufacture of various polymers and a process for their preparation are described.
Type:
Grant
Filed:
September 30, 1991
Date of Patent:
September 8, 1992
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
Ronald S. Newman, St. Clair W. Greenidge
Abstract: Compositions containing an acryloxysilane or a methacryloxysilane and an N,N-dialkylaminomethylene phenol in an amount at least sufficient to inhibit polymerization of the silane during its formation, purification and storage. Methods for producing such compositions are also provided.
Type:
Grant
Filed:
June 27, 1991
Date of Patent:
April 7, 1992
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation