Halogenated Hydrocarbon Component Patents (Class 510/412)
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Patent number: 6210602Abstract: Compositions including 1,1,1,3,3-pentafluorobutane and at least one surface-active agent chosen from hydrophobic organic surface-active agents of the amine, carboxylic acid diester and phosphoric acid ester types, which can be employed for removing water from a solid surface.Type: GrantFiled: March 29, 1996Date of Patent: April 3, 2001Assignee: Solvay S.A.Inventors: Pierre Barthelemy, Mireille Paulus
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Patent number: 6204237Abstract: A nonflammable glycol-based cleaning solvent which is not classified as, a hazardous material is provided. Isopropyl bromide (IPB) and/or n-propyl bromide (NPB), both of which being nonflammable solvents, is mixed to a main component comprised of propylene glycol-based solvents. The thus-obtained glycol-based cleaning solvent is given a nonflammable, flameproof characteristic. The first ingredient, comprised of one type of propylene glycol-based solvent or a plurality of types thereof, has a flash point of 28° C. or above. The amount of IPB and/or NPB being added to 100 pts.wt. of the first ingredient is in the range of 10-70 pts.wt., considering the negative influence of IPB and/or NPB on plastics and rubber.Type: GrantFiled: September 17, 1999Date of Patent: March 20, 2001Assignee: Hitachi Techo Engineering Co., Ltd.Inventors: Masayasu Suzuki, Akiyasu Kaneko
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Patent number: 6191086Abstract: Non-corrosive cleaning compositions that are aqueous based and useful for removing photoresist, plasma etch and CMP residues from a substrate. One preferred cleaning composition comprises: (i) a hydroxylamine or a hydroxylamine salt compound; (ii) at least one fluorine-containing compound; and (iii) water. Another cleaning composition comprises: (i) a compound selected from the group consisting of: an amine, a quatenary ammonium hydroxide, and ammonium hydroxide; (ii) at least one fluorine-containing compound; and (iii) water.Type: GrantFiled: December 15, 1999Date of Patent: February 20, 2001Assignee: Arch Specialty Chemicals, Inc.Inventors: Vincent G. Leon, Kenji Honda, Eugene F. Rothgery
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Patent number: 6187729Abstract: A liquid cleaning composition comprising a solvating agent and a rinsing agent, the ratio of the vapor pressure of said rinsing agent to the vapor pressure of said solvating agent being at least about 20 and the use thereof to clean substrates that have soil adhered thereto.Type: GrantFiled: June 6, 1995Date of Patent: February 13, 2001Assignee: Petroferm Inc.Inventors: Michael E. Hayes, Donald P. Hosman, Kevin R. Hrebenar, Robert D. Sell
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Patent number: 6176942Abstract: The invention provides a solvent mixture including n-propyl bromide, a mixture of low boiling solvents and, preferably, a defluxing and/or ionics removing additive and/or at least one saturated terpene. The invention also provides a method of cleaning an article (e.g., an electrical, plastic, or metal part) in a vapor degreaser using the solvent mixture. The solvent mixture of the invention is non-flammable, non-corrosive, and non-hazardous. In addition, it has a high solvency and a very low ozone depletion potential. Thus, using the solvent mixture of the invention, oil, grease, rosin flux, and other organic material can be readily removed from the article of interest in an environmentally safe manner.Type: GrantFiled: August 16, 1999Date of Patent: January 23, 2001Assignee: Lawrence Industries, IncInventors: Lawrence A. Clark, James L. Priest
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Patent number: 6174850Abstract: To replace compositions based on CFCs or CFHCs in applications for cleaning or drying solid surfaces (in particular defluxing), the invention proposes azeotropic or quasi-azeotropic compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane, 1,1,1,3,3-pentafluorobutane and, optionally, methanol.Type: GrantFiled: July 20, 1999Date of Patent: January 16, 2001Assignee: AtofinaInventor: Pascal Michaud
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Patent number: 6159917Abstract: The invention provides dry cleaning compositions comprising hydrofluoroether, a cosolvent selected from the group consisting of glycol ethers, fluorocarbon surfactants, alkanols, and mixtures thereof, and water present in an amount of less than 1 percent by weight. In another aspect, the invention provides a method of cleaning fabric articles comprising the step of contacting an effective amount of the above dry cleaning composition with a fabric for a length of time sufficient to clean the article.Type: GrantFiled: December 16, 1998Date of Patent: December 12, 2000Assignee: 3M Innovative Properties CompanyInventors: Jimmie R. Baran, Jr., John C. Newland
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Patent number: 6152149Abstract: A method of cleaning a power cable having a semi-conductive layer includes wiping the semi-conductive layer with a cleaning solution comprising a brominated hydrocarbon selected from the group consisting of n-propyl bromide and isopropyl bromide to remove at least a portion of the semi-conductive layer.Type: GrantFiled: December 22, 1999Date of Patent: November 28, 2000Assignee: Arnco CorporationInventors: Glenn Miller, Robert Washburn
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Patent number: 6153575Abstract: Describes a stabilized trans-1,2-dichloroethylene composition having a low concentration of aliphatic aldehyde hydrazone, optionally in combination with an epoxide. The aliphatic aldehyde hydrazone was found to be more efficient than commercially used hydroquinone monomethylether (HQMME) in preventing the isomeric transformation of trans-1,2-dichloroethylene to cis-1,2-dichloroethylene during storage. Also described is a process for cleaning the surface of an article with the stabilized 1,2-dichloroethylene composition.Type: GrantFiled: March 6, 2000Date of Patent: November 28, 2000Assignee: PPG Industries Ohio, Inc.Inventors: Earl M. Gorton, Ronald D. Olinger
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Patent number: 6133221Abstract: A cleaning process suitable for both mild and aggressive applications employs non-flammable, non-corrosive and environmentally friendly, fluorinated hydrobromocarbon solvent based cleaning compositions.Type: GrantFiled: January 13, 1999Date of Patent: October 17, 2000Assignee: Albemarle CorporationInventors: Phillip R. Beaver, James E. Boone, Dixie E. Goins, Eric W. Liimatta, David L. Shelton, Ronald L. Shubkin
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Patent number: 6114293Abstract: A process for cleaning movie film, and especially cellulose acetate based polymer film, without causing film damage, comprises immersing the film into a cleaning solvent composition which comprises one or more halogenated hydrobromocarbons having from 1 to 3 carbons, from 1 to 3 bromine atoms and at least one chlorine or fluorine atom, such as 3-bromo-1,1,1-trifluoropropane, removing the film from the solvent and drying the film.Type: GrantFiled: January 13, 1999Date of Patent: September 5, 2000Assignee: Albemarle CorporationInventors: Phillip R. Beaver, James E. Boone, Dixie E. Goins, Eric W. Liimatta, David L. Shelton, Ronald L. Shubkin
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Patent number: 6113708Abstract: A component (10 or 12) of a flat-panel display is cleaned with a fluid having a mole-fraction dominant constituent. The cleaning operation is performed by subjecting the component to the cleaning fluid while its absolute pressure exceeds the absolute pressure at the triple point of the dominant constituent and is at least 20% of the absolute pressure value at the critical point of the dominant constituent. The temperature and pressure of the cleaning fluid are typically controlled in a direction toward the supercritical state of the dominant constituent.Type: GrantFiled: May 26, 1998Date of Patent: September 5, 2000Assignees: Candescent Technologies Corporation, Hewlett-Packard CompanyInventors: George B. Hopple, Scott J. Crane, Bob L. Mackey, John D. Porter
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Patent number: 6080799Abstract: Mixtures containing 50 to 99% by weight of 1,1,1,3,3-pentafluorobutane and 1 to 50% by weight of at least one fluorohydrocarbon selected from 1,1,1,2-tetrafluoroethane, 1,1,1,3,3-pentafluoropropane, 1,1,1,3,3,3-hexafluoropropane, and 1,1,1,2,3,3,3-heptafluoropropane. The mixtures are extremely well suited for use as foaming gases for a blowing agent to produce foamed plastic materials, particularly polyurethane foams. The mixtures are not combustible and exhibit improved insulating properties, particularly when used at low temperatures.Type: GrantFiled: June 16, 1999Date of Patent: June 27, 2000Assignee: Solvay Fluor und Derivate GmbHInventors: Werner Kruecke, Lothar Zipfel
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Patent number: 6077819Abstract: A process is disclosed for recovering HF from a product mixture comprising HF and at least one compound having the formula CF.sub.3 CCl.sub.2+x F.sub.1-x (where x is 0 or 1). The process includes the steps of distilling the product mixture to remove all products which have a lower boiling point than the lowest boiling azeotrope containing HF and said at least one compound; and distilling said azeotrope to recover HF as an azeotropic composition containing HF and said at least one compound. Also disclosed are azeotrope and azeotrope-like compositions which consist essentially of hydrogen fluoride in combination with from about 10 to 27 mole percent CCl.sub.3 CF.sub.3 or from about 35 to 56 mole percent CCl.sub.2 FCF.sub.3.Type: GrantFiled: November 1, 1993Date of Patent: June 20, 2000Assignee: E. I. du Pont de Nemours and CompanyInventors: Barry A. Mahler, Ralph N. Miller, V. N. Mallikarjuna Rao
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Patent number: 6071872Abstract: A cleaning solution including a brominated hydrocarbon and an ester. The cleaning solution is especially useful for cleaning high-voltage power cables prior to splicing.Type: GrantFiled: June 10, 1998Date of Patent: June 6, 2000Assignee: Arnco CorporationInventors: Glenn Miller, Robert Washburn
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Patent number: 6063749Abstract: This invention provides a stabilized alkyl bromide based solvent system that is useful for cleaning and degreasing a wide variety of metal objects. The solvent is stabilized with a stabilizer system that includes a dialkyl carbonate such as dimethyl carbonate and optionally other stabilizers and/or acid scavengers to inhibit the metal induced decomposition of the alkyl bromide based solvent. The stabilized solvent is applied to metal articles by any known or conventional means to solvate and entrain greases, oils and other undesirable matter from the article's surface.Type: GrantFiled: July 9, 1998Date of Patent: May 16, 2000Assignee: Great Lakes Chemical CorporationInventor: Richard J. DeGroot
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Patent number: 6053952Abstract: The invention provides dry cleaning liquid formulations and methods for their use based on a highly fluorinated organic solvent which contains at least one hydrogen atom per molecule, in particular, highly fluorinated hydrocarbons or highly fluorinated ethers. In a preferred embodiment the cleaning liquid contains an HFC or HFE in combination with dichloroethylene. The addition of a surfactant enhances the ability of the liquid to remove water-soluble soils.Type: GrantFiled: September 3, 1998Date of Patent: April 25, 2000Assignee: Entropic Systems, Inc.Inventor: Robert Kaiser
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Patent number: 6048833Abstract: This invention provides a solvent composition comprising 1-bromopropane and a decafluoropentane for use as a cleaning and degreasing solvent. Preferably the decafluoropentane consists essentially of 1,1,1,2,3,4,4,5,5,5-decafluoropentane. The solvent composition optionally includes stabilizers and co-solvents such alcohols, ketones, ethers, acetals, nitroalkanes, epoxides and amines. Specific compositions of 1-bromopropane, 1,1,1,2,3,4,4,5,5,5-decafluoropentane and optional stabilizers provide azeotrope compositions that are particularly well suited as cleaning and degreasing solvents.Type: GrantFiled: July 9, 1998Date of Patent: April 11, 2000Assignee: Great Lakes Chemical CorporationInventor: Richard J. DeGroot
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Patent number: 6030932Abstract: Non-corrosive cleaning compositions that are aqueous based and useful for removing photoresist, plasma etch and CMP residues from a substrate. One preferred cleaning composition comprises: (i) a hydroxylamine or a hydroxylamine salt compound;(ii) at least one fluorine-containing compound; and (iii) water. Another cleaning composition comprises: (i) a compound selected from the group consisting of: an amine, a quatenary ammonium hydroxide, and ammonium hydroxide; (ii) at least one fluorine-containing compound; and (iii) water.Type: GrantFiled: May 19, 1998Date of Patent: February 29, 2000Assignee: Olin Microelectronic ChemicalsInventors: Vincent G. Leon, Kenji Honda, Eugene F. Rothgery
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Patent number: 6020299Abstract: Disclosed is a single phase mixture of about 1 to about 99 wt % of a compound having the general formula ##STR1## where "n" is 1 or 2 and about 0.1 to about 99 wt % of a liquid which can be a perfluoro aliphatic alkane from C.sub.5 to C.sub.8, a perfluoro cycloaliphatic alkane from C.sub.5 to C.sub.8, a perfluoro alkylcycloalkane having 5 to 8 carbon atoms in the ring and 1 or 2 branches of 1 to 3 carbon atoms each, a perfluoro-N-alkylmorpholine from C.sub.5 to C.sub.8, a perfluoro cycloether from C.sub.4 to C.sub.7, or a perfluoro polyether having an average molecular weight from about 400 to about 500.Type: GrantFiled: October 27, 1994Date of Patent: February 1, 2000Assignee: Occidental Chemical CorporationInventors: Hang-Chang Bobby Chen, Mark E. Lindrose
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Patent number: 5990071Abstract: Silver tarnishing is inhibited when using ether stabilized, n-propyl bromide based cleaning compositions by including a small amount of an acetylenic compound in the compositions.Type: GrantFiled: June 25, 1998Date of Patent: November 23, 1999Assignee: Albemarle CorporationInventor: Ronald L. Shubkin
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Patent number: 5989456Abstract: A solvent composition comprising dichloropentafluoropropane and (perfluorobutyl) methyl ether, wherein the ratios of the dichloropentafluoropropane and the (perfluorobutyl) methyl ether in the solvent composition are from 10 to 50 wt % and from 50 to 90 wt %, respectively.Type: GrantFiled: July 23, 1998Date of Patent: November 23, 1999Assignee: Asahi Glass Company Ltd.Inventor: Masaaki Tsuzaki
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Patent number: 5968882Abstract: Disclosed herein is a nonflammable mixed solvent composition comprising a completely fluorinated organic compound and a partially fluorinated organic compound as essential components, wherein the completely fluorinated organic compound is contained in an amount of at least 5% by weight.Type: GrantFiled: September 15, 1995Date of Patent: October 19, 1999Assignee: Canon Kabushiki KaishaInventors: Hirohide Matsuhisa, Tomomasa Nakamura
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Patent number: 5962390Abstract: A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.Type: GrantFiled: May 17, 1996Date of Patent: October 5, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Richard M. Flynn, Mark W. Grenfell, George G. I. Moore, John G. Owens, Dean S. Milbrath
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Patent number: 5948174Abstract: Compositions comprising a C.sub.3 -C.sub.10 hydrofluorocarbon, a cosolvent and a surface-active agent comprising at least one imidazoline, which can be used for removing water from a solid surface.Type: GrantFiled: December 29, 1997Date of Patent: September 7, 1999Assignee: SOLVAY (Societe Anonyme)Inventors: Pierre Barthelemy, Mireille Paulus, Robert Putteman
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Patent number: 5938859Abstract: The invention provides a solvent mixture including n-propyl bromide, a mixture of low boiling solvents and, preferably, a defluxing and/or ionics removing additive and/or at least one saturated terpene. The invention also provides a method of cleaning an article (e.g., an electrical, plastic, or metal part) in a vapor degreaser using the solvent mixture. The solvent mixture of the invention is non-flammable, non-corrosive, and non-hazardous. In addition, it has a high solvency and a very low ozone depletion potential. Thus, using the solvent mixture of the invention, oil, grease, rosin flux, and other organic material can be readily removed from the article of interest in an environmentally safe manner.Type: GrantFiled: November 10, 1997Date of Patent: August 17, 1999Assignee: Lawrence Industries, Inc.Inventors: Lawrence A. Clark, James L. Priest
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Patent number: 5925611Abstract: A process for removing contaminants from the surface of a substrate comprises contacting the substrate with a cleaning composition comprising at least one mono-, di-, or trialkoxy-substituted perfluoroalkane, perfluorocycloalkane, perfluorocycloalkyl-containing perfluoroalkane, or perfluorocycloalkylene-containing perfluoroalkane compound, the compound optionally containing additional catenary heteroatoms. The compounds exhibit good solvency properties while being environmentally acceptable.Type: GrantFiled: December 15, 1995Date of Patent: July 20, 1999Assignee: Minnesota Mining and Manufacturing CompanyInventors: Richard M. Flynn, George G. I. Moore, John G. Owens
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Patent number: 5916858Abstract: A method for washing metal masks using a cleaning liquid includes the steps of washing the metal masks before a solder printing process on printed circuit boards, washing the metal masks at least once during the solder printing process and washing the metal masks after completing the last solder printing process. The washing liquid has a composition consisting of from 1 to 5% by weight of a fluorine-based surfactant and from 95 to 99% by weight of isopropyl alcohol, the some of the constituents being 100% by weight. More preferably, the cleaning liquid is a composition consisting of 2% by weight of the fluorine-based surfactant and 98% by weight of isopropyl alcohol, the some of the constituents being 100% by weight.Type: GrantFiled: May 28, 1997Date of Patent: June 29, 1999Assignee: SamSung Electronics Co., Ltd.Inventors: Choul-Su Kim, Woo-Sig Kim, Masaharu Tsukue
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Patent number: 5897809Abstract: Azeotropic or azeotrope-like compositions comprising effective amounts of 1,1,1,2,3,4,4,5,5,5-decafluoropentane and cyclohexane or 1,1,1,2,3,4,4,5,5,5-decafluoropentane, cyclohexane and acetone to form an azeotropic or azeotrope-like composition that are useful as cleaning agents, displacement drying agents, wipe solvents, refrigerants, aerosol propellants, heat transfer media, gaseous dielectrics, fire extinguishing agents, expansion agents for polyolefins and polyurethanes and as power cycle working fluids are described.Type: GrantFiled: May 5, 1997Date of Patent: April 27, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Abid Nazarali Merchant, Barbara Haviland Minor, Shoeb Akberali Moiyadi
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Patent number: 5895793Abstract: A fluorine-containing hydrocarbon composition comprising the following (1) and (2), wherein the proportions of (1) and (2) in the composition are such that (1) is 100 parts by weight, and (2) is from 0.001 to 10 parts by weight:(1) at least one pentafluoropropane selected from 1,1,1,3,3-pentafluoropropane and 1,1,2,2,3-pentafluoropropane,(2) the following (i) or (ii):(i) a combination of (a) and at least one member selected from the following (b) to (e):(a) a compound having --NO.sub.2,(b) a compound having --CN,(c) a compound having --CONR.sup.1 R.sup.2 wherein each of R.sup.1 and R.sup.2 which are independent of each other, is a hydrogen atom or an alkyl group,(d) a lactone,(e) a quinone,(ii) at least one member selected from the following (f) and (g):(f) a reaction product of a compound having a halogen atom and an epoxy group with an active hydrogen compound,(g) a reaction product of a compound having a halogen atom and a hydroxyl group with an isocyanate compound.Type: GrantFiled: May 11, 1998Date of Patent: April 20, 1999Assignee: Asahi Glass Company Ltd.Inventors: Kenrou Kitamura, Keiichi Ohnishi, Masato Fukushima
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Patent number: 5885366Abstract: A washing method for removing oily soil from an object stained therewith by contacting the object with a non-flammable washing agent composition comprising 0.001 to 30 parts of a fluorine-free absorbent which can absorb and capture oily soil and not less than 70 parts of perfluorocarbon liquid to remove the soil from the object.Type: GrantFiled: August 12, 1996Date of Patent: March 23, 1999Assignees: Hakuyosha Co., Ltd., Nippon Shokubai Co., Ltd.Inventor: Makoto Umino
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Patent number: 5868799Abstract: Novel surfactants and drying, drycleaning and soil repellency compositions containing such surfactants which utilize such surfactants. The surfactants are fluorine containing quaternary ammonium salts, and the drying, drycleaning and soil repellency compositions contain at least one halocarbon component and at least one of the fluorine containing surfactants. These compositions have the ability to remove water or aqueous films from the surfaces of a broad range of substrates and impart soil repellency to fabrics.Type: GrantFiled: December 5, 1996Date of Patent: February 9, 1999Assignee: AlliedSignal Inc.Inventors: Gary John Zyhowski, David Nalewajek, Leonard Michael Stachura
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Patent number: 5863884Abstract: A composition as a strong surfactant such as a fluorosurfactant for breaking down the adhesive bond and removing cured silicone and other adhesives. The fluorosurfactant demonstrates improved effectiveness and rate of removal of these adhesives over all other known products currently available.Type: GrantFiled: June 11, 1997Date of Patent: January 26, 1999Inventor: Donald R. T. Lafreniere
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Patent number: 5858953Abstract: A 1-bromopropane composition is disclosed, which stays stable even under the condition that it is repeatedly used at high temperatures over an extended period of time as in vapor degreasing. The stabilized 1-bromopropane composition comprises 100 parts by weight of 1-bromopropane, from 0.1 to 5 parts by weight of nitromethane, and from 0.1 to 5 parts by weight of 1,2-butylene oxide or trimethoxymethane.Type: GrantFiled: April 4, 1996Date of Patent: January 12, 1999Assignee: Tosoh CorporationInventors: Shunji Aman, Yoshikazu Oda
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Patent number: 5851436Abstract: Compositions of nonafluoromethoxybutane and cyclopentane, nonafluoromethoxybutane and cyclohexane; nonafluoromethoxybutane, cyclopentane and acetone, nonafluoromethoxybutane, cyclohexane and acetone, nonafluoromethoxybutane, trans-1,2-dichloroethylene and cyclopentane; and nonafluoromethoxybutane, trans-1,2-dichloroethylene, cyclopentane and methanol are described. These compositions are useful as cleaning agents, displacement drying agents, refrigerants, heat transfer media, expansion agents for polyolefins and polyurethanes, aerosol propellants, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, and buffing abrasive agents.Type: GrantFiled: May 19, 1997Date of Patent: December 22, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Abid Nazarali Merchant, Barbara Haviland Minor, Shoeb Akberali Moiyadi
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Patent number: 5851435Abstract: Disclosed is a cleaning composition of about 80 to about 99 wt % benzotrifluoride, about 1 to about 20 wt % monohydric alkanol from C.sub.1 to C.sub.4, and up to about 20 wt % of a fluorocarbon having the general formula C.sub.m H.sub.n F.sub.2m+2n, where m is 4 to 8 and n is 1 to m/2 if m is even and (m+1)/2 if m is odd. The composition is useful in cleaning greases, oils, solder fluxes, and other soils.Type: GrantFiled: May 10, 1996Date of Patent: December 22, 1998Assignee: Occidental Chemical CorporationInventors: Hang-Chang Bobby Chen, Edward A. Rowe
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Patent number: 5851977Abstract: Describes nonflammable organic solvent compositions comprising 1,2-dichloroethylene and a halocarbon different than 1,2-dichloroethylene. The 1,2-dichloroethylene consists essentially of trans-1,2-dichloroethylene, cis-1,2-dichloroethylene and mixtures thereof; preferably a major amount of trans-1,2-dichloroethylene; and in particular at least 99% by weight of trans-1,2-dichloroethylene, based on the total weight of 1,2-dichloroethylene. The halocarbon is selected from the group consisting of 1,1,1,3,3,3-hexafluoroisopropanol, perfluoro-tert-butyl alcohol, 1,1,2,3,3-pentafluoropropane, 1-bromo-2-chloro-1,1,2-trifluoroethane, 1,2-dichloro-1,1,2,3,3,3-hexafluoropropane and mixtures thereof.Type: GrantFiled: August 26, 1997Date of Patent: December 22, 1998Assignee: PPG Industries, Inc.Inventors: Earl M. Gorton, Tommy G. Taylor, Ronald D. Olinger
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Patent number: 5827454Abstract: A mixed solvent composition, for cleaning electronic components, which consists essentially of dichloropentafluoropropane and 1,1,1,2,3,4,4,5,5,5-decafluoropentane.Type: GrantFiled: January 18, 1996Date of Patent: October 27, 1998Assignee: AG Technology Co., Ltd.Inventors: Kitamura Kenroh, Ikehata Michino, Tsuzaki Masaaki
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Patent number: 5824634Abstract: Cleaning compositions comprising an acyclic aliphatic hydrofluorocarbon represented by the formula:C.sub.x H.sub.y F.sub.2x+2-ywhere x equals 4, 5 or 6, y equals 1, 2 or 3 with the proviso that when x equals 4, Y equals 2 or 3, and a co-solvent boiling between 200.degree. C.-105.degree. C. that are alcohols, esters, ethers, ketones, chlorinated hydrocarbons, optionally containing fluorine, having 1-4 carbons atoms, acetonitrile and nitromethane.Type: GrantFiled: July 2, 1996Date of Patent: October 20, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: Abid Nazarali Merchant
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Patent number: 5824162Abstract: The present invention provides a solvent mixture comprising n-propyl bromide, a mixture of terpenes and a mixture of low boiling solvents, and a method for cleaning an article (e.g., an electrical, plastic, and metal parts) in a vapor degreaser using the solvent mixture. The solvent mixture of the present invention is non-flammable, non-corrosive and non-hazardous. In addition, it has a high solvency and a very low ozone depleting potential. Thus, using the solvent mixture of the present invention, oil, grease, rosin flux and other organic material can be readily removed from the article of interest in an environmentally safe manner.Type: GrantFiled: March 28, 1997Date of Patent: October 20, 1998Assignee: Lawrence Industries, Inc.Inventor: Lawrence A. Clark
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Patent number: 5801136Abstract: A stabilized, environmentally-safe solvent mixture and method for using the mixture are provided. The solvent mixture has an ozone depletion factor of less than 0.08. The mixture includes about 80-96.8%, by volume, chlorobromomethane and about 3.2-20.0%, by volume, of a mixture of stabilizers. The mixture of stabilizers includes nitromethane, 1,2-butylene oxide, and 1,3-dioxolane. The mixture of stabilizer inhibits the decomposition of chlorobromomethane. The solvent mixture is particularly effective for cleaning articles having hydrocarbon-soluble contaminants, especially in a vapor degreaser.Type: GrantFiled: February 9, 1996Date of Patent: September 1, 1998Assignee: Advanced Chemical Design, Inc.Inventor: Richard G. Henry
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Patent number: 5759985Abstract: A combination of stabilizers and bromochloromethane are used as a cleaning composition in which the bromochloromethane is stabilized against decomposition and the release of bromine into the atmosphere.Type: GrantFiled: September 18, 1997Date of Patent: June 2, 1998Assignee: Advanced Chemical Design, Inc.Inventor: Richard G. Henry
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Patent number: 5756002Abstract: A cleaning solvent comprising(A) about 3 to about 20 wt % of a fluorinated compound selected from the group consisting of(1) fluorocarbons having the general formulaC.sub.m H.sub.n F.sub.2m+2-nwhere m is 4 to 8, and n is 0 to m/2 if m is even and 0 to (m+1)/2 if m is odd;(2) C.sub.5 F.sub.11 NO;(3) alkyl perfluoroethers having the general formulaR.sub.1 OR.sub.2where R.sub.1 is C.sub.3 F.sub.7 or C.sub.4 F.sub.9 and R.sub.2 is CH.sub.3 or C.sub.2 H.sub.5 ; and(4) fluorochlorocarbons having the general formulaC.sub.p H.sub.q Cl.sub.r F.sub.2p+2-q-rwhere p is 3, 4, or 5, q is 1 to p-1, and r is 1 to p-1;(B) up to about 15 wt % of a C.sub.1 to C.sub.4 alkanol; and(C) the remainder benzotrifluoride.Type: GrantFiled: May 10, 1996Date of Patent: May 26, 1998Assignee: Occidental Chemical CorporationInventors: Hang-Chang Bobby Chen, Edward A. Rowe
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Patent number: 5750488Abstract: Cleaning compositions contain one or more fluorinated chemical and one or more acetal. The cleaning compositions have good volatility, low flammability, low toxicity, good cleaning ability, and do not harm the ozone layer.Type: GrantFiled: January 4, 1996Date of Patent: May 12, 1998Assignee: CRC Industries, Inc.Inventors: Malcolm W. Haskell, Richard Miller, Suzanne Zefferi
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Patent number: 5744436Abstract: An azeotropic composition includes a perfluorinated cycloaminoether and an organic solvent.Type: GrantFiled: January 16, 1996Date of Patent: April 28, 1998Assignee: Minnesota Mining and Manufacturing CompanyInventors: Richard M. Flynn, Daniel R. Vitcak
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Patent number: 5707954Abstract: A stabilized solvent composition which is comprised of: a solvent portion which includes at least 90 wt % n-propyl bromide; and a 1,4-dioxane-free stabilizer system which includes 2,2-dialkoxypropane in which each alkoxy group independently contains up to 3 carbon atoms. The solvent composition is useful as a degreaser and cleaner in both cold and vapor cleaning systems.Type: GrantFiled: March 1, 1996Date of Patent: January 13, 1998Assignee: Albemarle CorporationInventor: Burnell Lee
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Patent number: 5683978Abstract: The compounds CF.sub.3 CHFCHFCF.sub.2 CF.sub.3, CF.sub.3 CH.sub.2 CHFCF.sub.2 CF.sub.3, CF.sub.3 CHFCH.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CHFCHFCF.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CH.sub.2 CHFCF.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CHFCH.sub.2 CF.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CF.sub.2 CH.sub.2 CHFCF.sub.2 CF.sub.3, CF.sub.3 CF.sub.2 CHFCHFCF.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CHFCHFCF.sub.2 CF.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CHFCH.sub.2 CF.sub.2 CF.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CH.sub.2 CHFCF.sub.2 CF.sub.2 CF.sub.2 CF.sub.3, CF.sub.3 CF.sub.2 CHFCH.sub.2 CF.sub.2 CF.sub.2 CF.sub.3, and CF.sub.3 CF.sub.2 CH.sub.2 CHFCF.sub.2 CF.sub.2 CF.sub.3 ; and compositions thereof.Type: GrantFiled: June 2, 1995Date of Patent: November 4, 1997Assignee: E. I. du Pont de Nemours and CompanyInventors: Carl George Krespan, V. N. Mallikarjuna Rao
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Patent number: 5679632Abstract: This invention relates to a solvent system and process for cleaning cellulose triacetate polymer camera film. The solvent system comprises n-propyl bromide and a mix of an alkyl bromide in which the alkyl group contains 4 to 7 carbon atoms and an alkane containing 6 to 7 carbon atoms.Type: GrantFiled: February 29, 1996Date of Patent: October 21, 1997Inventors: Burnell Lee, Farah D. Azarnia
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Patent number: 5674825Abstract: The present invention relates to new uses of difluoromethoxy-2,2,2-trifluoroethane (E245) or of compositions which contain difluoromethoxy-2,2,2-trifluoroethane together with a further solvent (cosolvent). The invention furthermore relates to new compositions of E245 as a mixture with some of these solvents. A preferred process of use is fixing toner applied to a recording material in the fixing device of a printing or copying apparatus by means of a fixing vapor composed of difluoromethoxy-2,2,2-trifluoroethane (E245) alone or in admixture with a cosolvent.Type: GrantFiled: July 6, 1995Date of Patent: October 7, 1997Assignee: Solvay Fluor und Derivate GmbHInventors: Hans Buchwald, Joachim Hellmann, Boleslaus Raszkowski
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Patent number: 5667594Abstract: A cleaning solvent composition that is made by either blending aliphatic fluorohydrocarbon as expressed by the general formulaC.sub.n F.sub.m H.sub.2n+2-m(wherein, n and m are a positive integral numbers, being 4.ltoreq.n.ltoreq.6, 2n-3.ltoreq.m<2n+2 respectively) or blending a mixture of this aliphatic fluorohydrocarbon and alcohol having a carbon number of 1 to 4 with lactam and/or carboxylic acid amide, tertiary amines, or alcohol having ether linkage and/or amino linkage within its molecules. A cleaning process wherein an object is dipped into the said composition to remove dirty component, then rinsed with a mixture of the said aliphatic fluorohydrocarbon and the said alcohol having a carbon number of 1 to 4, and thereafter the object is steam cleaned with the said mixture when necessity arises.Type: GrantFiled: March 14, 1994Date of Patent: September 16, 1997Assignee: Daikin Industries Ltd.Inventors: Yukio Omure, Hirokazu Aoyama, Satoshi Ide, Takahiro Matsuda