[go: up one dir, main page]

WO1991013969A1 - Compositions azeotropiques ou analogues a l'azeotrope stabilisees a point d'ebullition constant de dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane comportant du methanol et/ou de l'ethanol - Google Patents

Compositions azeotropiques ou analogues a l'azeotrope stabilisees a point d'ebullition constant de dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane comportant du methanol et/ou de l'ethanol Download PDF

Info

Publication number
WO1991013969A1
WO1991013969A1 PCT/US1991/000846 US9100846W WO9113969A1 WO 1991013969 A1 WO1991013969 A1 WO 1991013969A1 US 9100846 W US9100846 W US 9100846W WO 9113969 A1 WO9113969 A1 WO 9113969A1
Authority
WO
WIPO (PCT)
Prior art keywords
azeotrope
composition
weight percent
dichloro
fluoroethane
Prior art date
Application number
PCT/US1991/000846
Other languages
English (en)
Inventor
Robert Alexander Gorski
Original Assignee
E.I. Du Pont De Nemours And Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by E.I. Du Pont De Nemours And Company filed Critical E.I. Du Pont De Nemours And Company
Publication of WO1991013969A1 publication Critical patent/WO1991013969A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5036—Azeotropic mixtures containing halogenated solvents
    • C11D7/5068—Mixtures of halogenated and non-halogenated solvents
    • C11D7/5077—Mixtures of only oxygen-containing solvents
    • C11D7/5081—Mixtures of only oxygen-containing solvents the oxygen-containing solvents being alcohols only
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
    • C23G5/02—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents
    • C23G5/028—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons
    • C23G5/02809—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons containing chlorine and fluorine
    • C23G5/02825—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing halogenated hydrocarbons containing chlorine and fluorine containing hydrogen
    • C23G5/02829—Ethanes
    • C23G5/02832—C2H3Cl2F

Definitions

  • soldering which thermally degrades part of the rosin
  • flux and flux residues are often removed from the board with an organic solvent composition. Since requirements for the removal of contaminants from circuit boards are very stringent, most current industrial circuit board cleaning processes involve the use of vapor defluxing techniques.
  • the soldered circuit board is passed through a sump of boiling organic solvent, which removes the bulk of the rosin—including thermally degraded rosin—and thereafter, through a sump which contains freshly distilled solvent and finally through solvent vapor above the boiling simp, which provides a final rinse with a clean, distilled solvent which has condensed on the circuit board.
  • circuit board could also be sprayed with distilled solvent, if required, before the final rinse.
  • azeotrope or azeotrope-l ike compositions of dichlorotrifluoroethane and 1, 1-dichloro-1-fluoroethane with methanol and/or ethanol are excellent solvent systems for cleaning circuit boards, for practical industrial use these solvent systems, as is the case with many solvent systems, should be stabil ized against compositional changes during both use and long term storage. Changes, such as oxidation, polymerization, component interactions and the l ike, may generate products which adversely affect the circuit boards being cleaned or the solvent compositions themselves.
  • dichlorotrifluoroethane end 1, 1-dichloro-1-fluoroethane with methanol and/or ethanol which are compositionally stable during use and long term storage and which minimize the formation of undesirable reaction products, which may adversely affect their storage and use, e.g. , for electronic circuit board cleaning.
  • 2,6-dimethylpiperidine 2,6-dimethylpiperidine; n itromethane, 1,2-propylene oxide and 1,2-butylene oxide; nitromethane, diisopropylamine and an epoxide selected from the group consisting of 1,2-propylene oxide and 1,2-butylene oxide; nitromethane, a lower alkoxyphenol and at least one amine selected from the group consisting of diisopropylamine and 2,6-dimethylpiperidine.
  • azeotrope or azeotrope-like composi tions consisting essentially of about 3 to 70 weight percent dichlorotrifluoroethane, about 25 to 94.9 weight percent 1,1-dichloro-1-fluoroethane and about 0.1 to 5 weight percent methanol and/or ethanol and effective stabilizing amounts of nitromethane, a lower alkoxyphenol , an epoxide selected from the group consisting of 1,2-propylene oxide and 1,2-butylene oxide and an amine selected from the group consisting of diisopropylamine and
  • azeotrope or azeotrope-like compositions consisting essentially of about 30 to 70 weight percent
  • 1,1-dichloro-1-fluoroethane, methanol and/or ethanol which, when combined, result in the formation of an azeotrope or azeotrope-like composition.
  • nitromethane a lower alkoxyphenol
  • an epoxide selected from the group consisting of 1,2-propylene oxide and
  • 1,2-butylene oxide and an amine selected from the group consisting of diisopropylamine and 2,6-dimethylpiperidine; or o 1,2-butylene oxide and/or 2,6-dimethylpiperidine; or o nitromethane and et least one compound selected from the group consisting of 1,2-propylene oxide, 1,2-butylene oxide, diisopropylamine and 2,6-dimethylpiperidine; or
  • nitromethane a lower alkoxyphenol and at least one amine selected from the group consisting of diisopropylamine and 2,6-dimethylpiperidine;
  • azeotrope or azeotrope-l ike composition consisting essentially of is intended to include mixtures which contain all the components of the azeotrope described herein (in any amounts) and which, if fractionally distilled, would produce an azeotrope containing all the components of the azeotrope in at least one fraction, alone or in combination with other compounds, e.g. , one or more which distil l at substantial ly the same temperature as said fraction.
  • lower al koxyphenol is meant methoxyphenol
  • the preferred lower al koxyphenol is 4-methoxyphenol .
  • dichlorotrifluoroethane is meant to include either 1,1-dichloro-2,2,2-trifluoroethane (HCFC-123) and/or
  • HCFC-123 and HCFC-123a may contain as much as about 20.0 wt. %
  • HCFC-123a 1,2-dichloro-1,1,2-trifluoroethane which mixture is also covered by the language dichlorotrifluoroethane as well as the inclusion of minor amounts of other materials which do not significantly alter the azeotrope or azeotrope-like character of the compositions of the instant invention.
  • azeotrope-like composition is an admixture of two or more different components which, when in liquid form, under given pressure, will boil at substantially constant temperature, which temperature may be higher or lower than the boiling temperature of the components and which will provide a vapor composition essentially identical to the liquid composition undergoing boiling.
  • the essential features of an azeotrope or azeotrope-like composition are that at a given pressure, the boiling point of the liquid composition is fixed and the composition of the vapor above the boiling composition is essentially that of the boiling liquid composition, i.e.
  • an azeotrope or azeotrope-like composition may be defined in terms of the unique relationship which exists among components, or in terms of component compositional ranges, or in terms of each component's weight percentages in the composition,
  • the present azeotrope or azeotrope-like compositions comprise a ⁇ toixtures of effective amounts of
  • dichlorotrifluoroethane and 1,1-dichloro-1-fluoroethane with methanol and/or ethanol more specifically, the present compositions comprise mixtures of about 3 to 70 weight percent dichlorotrifluoroethane, about 30 to 94.5 weight percent
  • 1,1-dichloro-1-fluoroethane and about 0.1 to 5 weight percent methanol and/or ethanol consist essentially of about 30 to 70 weight percent dichlorotrifluoroethane, about 25 to 70 weight percent 1,1-dichloro-1-fiuoroethane and about 1 to 5 weight percent methanol and/or ethanol .
  • the constant-boiling, azeotrope-like compositions of the instant invention boil at about 30-32°C, at substantially atmospheric pressure (760mm Hg) .
  • azeotrope or azeotrope-like compositions are more fully described in U.S. Patent No. 4,863,630, issued September 5, 1989 and U.S. Application Serial Nos. 07/297,366 filed January 17, 1989, and 07/297,467 filed January 17, 1989, all
  • the more preferred constant-boiling azeotrope or azeotrope-like composition of the instant invention has the following composition: about 36 weight percent
  • the constant-boiling azeotrope or azeotrope-like composition boils at about 30°C, at substantially atmospheric pressure (760mm Hg) .
  • azeotrope-like composition of the instant invention is about 40 weight percent 1,1-dichloro-2,2,2-trifluoroethane, about 59 weight percent 1,1-dichloro-1-fluoroethane and about 1 weight percent ethanol .
  • azeotrope-like composition boils at about 31°C, at
  • the above constant-boiling azeotrope or azeotrope-like compositions are effective solvents for cleaning circuit boards.
  • Such solvent compositions are characterized by desirable properties of relatively low boiling points, non-flanmability, relatively low toxicity and high solvency for flux and flux residues.
  • the components also permit easy recovery and reuse without loss of their desirable
  • azeotrope or azeotrope-like compositions of dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane with methanol and/or ethanol perform well in printed circuit board vapor defluxing-degreasing applications, it is recognized that in order to take practical advantage of the unique properties of these solvent compositions, certain other desirable properties should be imparted to the compositions,
  • Another comnercially desirable characteristic to be imparted to the solvent system is stability during use. For example, as described above, in the vapor defluxing cleaning procedure, the circuit board to be cleaned is first passed through a sump which contains boiling
  • the organic solvent for removal of bulk rosin, including thermally degraded rosin.
  • the organic solvent is in contact with a heat source for a prolonged time.
  • the circuit board After passage through the first sump the circuit board is passed through a sump which contains freshly distilled solvent and finally through solvent vapor over a boiling sump, which provides a final rinse with a clean solvent which condenses on the circuit board.
  • the organic solvent may be subjected to constant heating either in maintaining boiling sumps or in vaporizing the solvent to provide freshly distilled solvent or vapor to condense on the circuit board for the final rinse. It is, therefore, highly desirable to minimize any change in the solvent system which can adversely affect the cleaning process or degrade the integrity of the solvent. As mentioned earlier, such changes may be due to oxidation, polymerization or interaction among the solvent system components.
  • hydrochlorofluorocarbons and the alcohols of the azeotope or azeotrope-like compositions which may generate acidic products and chloride ions.
  • chlorofluorocarbon and lower alcohols particularly methanol
  • reactive metals such as zinc and aluminim as well as certain aluminum alloys, which are often used as materials of circuit board construction.
  • nitromethane may be incorporated in the preseht solvent system in concentrations of about 0.1 and 0.8 weight percent and effectively retard this type of attack.
  • 1,2-butylene oxide (concentration about 0.05 and 0.4 weight percent) provides outstanding stability to the present solvent systems. All weight percentages are based on the weight of the of the dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane and methanol or ethanol azeotrope or azeotrope-like compositions.
  • the stabilizers used in the present solvent systems appear to stabilize the the solvent systems by working
  • One of the stabilized azeotrope or azeotrope-like compositions of the present invention may contain about 30 to 70 weight percent dichlorotrifluoroethane, about 25 to 70 weight percent 1,1-dichloro-1-fluoroethane, about 1 to 5 weight percent methanol, about 0.1 to 0.8 weight percent of
  • nitromethane about 0.05 to 0.4 weight percent of either 1,2-propylene oxide or 1,2-butylene oxide, about 0.025 to 0.2 weight percent of either diisopropylamine or
  • the above described stabilized composition of the present invention may contain about 36 weight percent
  • 1,1-dichloro-2,2,2-trifluoroethane about 61 weight percent 1,1-dichloro-1-fluoroethane, about 3 weight percent methanol, about 0.2 weight percent nitromethane, about 0.05 weight percent of either 1,2-propylene oxide or 1,2-butylene oxided about 0.05 weight percent of either diisopropylamine or
  • Another stabilized azeotrope or azeotrope-like composition of the present invention may contain about 30 to 70 weight percent dichlorotrifluoroethane, about 25 to 70 weight percent 1,1-dichloro-1-fluoroethane, about 1 to 5 weight percent ethanol , about 0.1 to 0.8 weight percent of
  • nitromethane about 0.05 to 0.4 weight percent of either
  • 1,2-propylene oxide or 1,2-butylene oxide about 0.025 to 0.2 weight percent of either diisopropylamine or
  • the above described stabil ized composition of the present invention may contain about 40 weight percent
  • 1,1,-dichloro-2,2,2-trifluoroethane about 59 weight percent 1,1-dichloro-1-fluoroethane, about 1 weight percent ethanol , about 0.2 weight percent nitromethane, about 0.05 weight percent of either 1,2-propylene oxide or 1,2-butylene oxide, about 0.05 weight percent of either diisopropylamine or
  • the present invention thus provides stabilized azeotrope or azeotrope-like compositions of
  • dichlorotrifluoroethane and 1,1-dichloro-1-fluoroethane with methanol or ethanol which can be stored for long periods periods of time, which will undergo little or no change during either prolonged storage or commercial use and which minimize both aluminum corrosion aid gel formation.
  • compositions have low ozone depletion potentials and are expected to decompose almost completely, prior to reaching the stratosphere.
  • the azeotropes or azeotrope-like compositions of the present invention permit easy recovery and reuse of the solvent from vapor defluxing and degreasing operations because of their azeotropic natures.
  • the azeotropic mixtures of this invention can be used in cleaning processes such as described in U.S. Patent No.3,881,949, which is incorporated herein by reference.
  • azeotrope or azeotrope-like compositions of the instant invention with the components of the inhibitor package can be prepared by any convenient method including mixing or combining the desired component amounts.
  • a preferred method is to weigh the desired component amounts and thereafter combine them in an appropriate container.
  • 1,1-dichloro-1-fluoroethane and about 2.5 weight percent methanol with various inhibitor combinations were carried out by refluxing 150 ml of the solvent combination in a series of 500 ml Pyrex flasks using a 90 percent water-saturated solvent.
  • the flasks were connected to water-cooled condensers, on top of which were affixed "Drierite” desiccant tubes to exclude atmospheric moisture from the test systems.
  • stainless steel (SS-304) specimens were located at the refluxing solvent vapor/air interface in the condenser and coupled stainless steel (SS-304)/aluminim alloy (AL-7075) specimens were located in the boiling liquids.
  • the 1,1-dichloro-1-fluoroethane used in these tests contained 500 parts per million by weight of vinylidine chloride, an impurity nomally found in the crude product.
  • test no.1 (below) , only 15 ppm by weight of vinylidine chloride was used.
  • the solvent inhibitor systems tested are described in the Table.
  • Chloride ion concentration increases were measured.
  • the tested solvent was extracted with an equal volume of deionized water and analyzed for chloride ion concentration.
  • the corrosion products on the metal specimens were removed carefully by sliding a knife over the metal surface, without removing the base metal.
  • the metal scrapings were returned to the flask in which it had been tested originally.
  • One hundred ml of 5 percent sulfuric acid was added to the flask in order to dissolve the corrosion products. This solution was analyzed for chloride ion. Net test chloride ion was calculated from the combined chloride ion concentration found after the test less the chloride ion background found in the original solvent.
  • Chloride ion increase generally represents loss of solvent system component stability. Stability loss is generally accompanied by increased acidity.
  • Corrosion rates were measured by rubbing the metal surfaces with ink and pencil erasers, brushing the surfaces, rinsing the specimens with 1,1,2-trichlorotrifluoroethane, deionized water and acetoie, drying for 24 hours over

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Detergent Compositions (AREA)

Abstract

Compositions azéotropiques ou analogues à l'azéotrope stabilisées de dichlorotrifluoroéthane et 1,1-dichloro-1-fluoroéthane comportant du métanol et/ou de l'éthanol, avec des quantités stabilisantes efficaces de nitrométhane, d'oxyde de 1,2-propylène, d'oxyde de 1,2-butylène, de diisopropylamine, de 2,6-diméthylpipéridine et d'un alcoxyphénol inférieur dans des combinaisons spécifiées.
PCT/US1991/000846 1990-03-13 1991-02-13 Compositions azeotropiques ou analogues a l'azeotrope stabilisees a point d'ebullition constant de dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane comportant du methanol et/ou de l'ethanol WO1991013969A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US49296590A 1990-03-13 1990-03-13
US492,965 1990-03-13

Publications (1)

Publication Number Publication Date
WO1991013969A1 true WO1991013969A1 (fr) 1991-09-19

Family

ID=23958329

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1991/000846 WO1991013969A1 (fr) 1990-03-13 1991-02-13 Compositions azeotropiques ou analogues a l'azeotrope stabilisees a point d'ebullition constant de dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane comportant du methanol et/ou de l'ethanol

Country Status (2)

Country Link
AU (1) AU7309991A (fr)
WO (1) WO1991013969A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503441A1 (fr) * 1991-03-07 1992-09-16 Solvay Fluor und Derivate GmbH Stabilisation de dichlorotrifluoroéthane
FR2700776A1 (fr) * 1993-01-27 1994-07-29 Atochem Elf Sa Composition de nettoyage stabilisée à base de 1,1-dichloro-1-fluoroéthane et de méthanol.
US5366946A (en) * 1992-09-29 1994-11-22 Solvay (Societe Anonyme) Stabilized 1,1-dichloro-1-fluoroethane, premixtures intended for the preparation of polymeric foams and polymeric foams obtained by the use thereof
US5538665A (en) * 1992-03-02 1996-07-23 Solvay (Societe Anonyme) Process for stabilizing a hydrofluoroalkane and compositions comprising at least one hydrofluoroalkane
WO2013075165A1 (fr) * 2011-11-21 2013-05-30 Brown Paul William Support pelvien

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4803009A (en) * 1988-02-02 1989-02-07 E. I. Du Pont De Nemours And Company Stabilized azeotrope or azeotrope-like composition of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol and 1,2-dichloroethylene
JPH01152200A (ja) * 1987-12-09 1989-06-14 Du Pont Mitsui Fluorochem Co Ltd 溶剤組成物
US4863630A (en) * 1989-03-29 1989-09-05 Allied-Signal Inc. Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane and ethanol
WO1989009845A1 (fr) * 1988-04-04 1989-10-19 Allied-Signal Inc. Composites du type azeotrope de dichlorotrifluoroethane, de methanol et de nitromethane
WO1989010984A1 (fr) * 1988-05-03 1989-11-16 Allied-Signal Inc. Compositions de 1,1-dichloro-1-fluoroethane et de methanol analogues a un azeotrope
US4894176A (en) * 1988-12-27 1990-01-16 Allied-Signal Inc. Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane and methanol
EP0378140A2 (fr) * 1989-01-13 1990-07-18 Kali-Chemie Aktiengesellschaft Compositions de nettoyage
EP0381216A1 (fr) * 1989-02-01 1990-08-08 Asahi Glass Company Ltd. Mélange azéotropique ou semblable à un mélange azéotropique à base d'hydrocarbures hydrogénés, chlorés et fluorés

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01152200A (ja) * 1987-12-09 1989-06-14 Du Pont Mitsui Fluorochem Co Ltd 溶剤組成物
US4803009A (en) * 1988-02-02 1989-02-07 E. I. Du Pont De Nemours And Company Stabilized azeotrope or azeotrope-like composition of 1,1,2-trichloro-1,2,2-trifluoroethane, methanol and 1,2-dichloroethylene
WO1989009845A1 (fr) * 1988-04-04 1989-10-19 Allied-Signal Inc. Composites du type azeotrope de dichlorotrifluoroethane, de methanol et de nitromethane
WO1989010984A1 (fr) * 1988-05-03 1989-11-16 Allied-Signal Inc. Compositions de 1,1-dichloro-1-fluoroethane et de methanol analogues a un azeotrope
US4894176A (en) * 1988-12-27 1990-01-16 Allied-Signal Inc. Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane and methanol
EP0378140A2 (fr) * 1989-01-13 1990-07-18 Kali-Chemie Aktiengesellschaft Compositions de nettoyage
EP0381216A1 (fr) * 1989-02-01 1990-08-08 Asahi Glass Company Ltd. Mélange azéotropique ou semblable à un mélange azéotropique à base d'hydrocarbures hydrogénés, chlorés et fluorés
US4863630A (en) * 1989-03-29 1989-09-05 Allied-Signal Inc. Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, dichlorotrifluoroethane and ethanol

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CHEMICAL ABSTRACTS, vol. 111, no. 26, 26 April 1989 Columbus, Ohio, USA & JP-A-1152200 (DU PONT-MITSUI FLUOROCHEMICALS): page 150; ref. no. 235679 see abstract *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0503441A1 (fr) * 1991-03-07 1992-09-16 Solvay Fluor und Derivate GmbH Stabilisation de dichlorotrifluoroéthane
US5538665A (en) * 1992-03-02 1996-07-23 Solvay (Societe Anonyme) Process for stabilizing a hydrofluoroalkane and compositions comprising at least one hydrofluoroalkane
US5366946A (en) * 1992-09-29 1994-11-22 Solvay (Societe Anonyme) Stabilized 1,1-dichloro-1-fluoroethane, premixtures intended for the preparation of polymeric foams and polymeric foams obtained by the use thereof
FR2700776A1 (fr) * 1993-01-27 1994-07-29 Atochem Elf Sa Composition de nettoyage stabilisée à base de 1,1-dichloro-1-fluoroéthane et de méthanol.
EP0609125A1 (fr) * 1993-01-27 1994-08-03 Elf Atochem S.A. Composition de nettoyage stabilisée à base de 1,1-dichloro-1-fluoréthane et de méthanol
WO2013075165A1 (fr) * 2011-11-21 2013-05-30 Brown Paul William Support pelvien

Also Published As

Publication number Publication date
AU7309991A (en) 1991-10-10

Similar Documents

Publication Publication Date Title
EP0327282B1 (fr) Composition stabilisée azéotrope ou analogue à un azéotrope contenant du 1,1,2-trichloro-1,2,2-trifluoréthane, du méthanol et du 1,2-dichloroéthylène
US5792277A (en) N-propyl bromide based cleaning solvent and ionic residue removal process
EP0309082B1 (fr) Composition azéotrope ou de type azéotrope du trichlorotrifluoroéthane, du méthanol et du 1,2-dichloroéthylène
US4804493A (en) Stabilized azeotrope or azeotrope-like composition of 1,1,2-trichloro-1,2,2-trifluoroethane and trans-1,2-dichloroethylene
KR0129529B1 (ko) 1,1-디클로로-1-플루오로에탄 및 메탄올/에탄올의 공비조성물 및 이것으로 고체표면을 세정하는 방법.
DE69505636T2 (de) Azeotrope und azeotropartige Zusammensetzungen enthaltend Oktamethyltrisiloxane
US4816176A (en) Azeotrope-like compositions of dichlorotrifluoroethane, methanol and nitromethane
EP0421790A2 (fr) Compositions stabilisées azéotropiques de 1,1-dichloro-2,2,2,-trifluoroéthane et de 1,1-dichloro-1-fluoroéthane
US4476036A (en) Quaternary 1,1,2-trichloro-1,2,2-trifluoro azeotropic cleaning composition
US4961870A (en) Azeotrope-like compositions of 1,1,2-trichloro-1,2,2-trifluoroethane,1,2-dichloroethylene, and alkanol having 3 to 7 carbon atoms
US4816175A (en) Azeotrope-like compositions of dichlorotrifluoroethane, methanol, cyclopentane and nitromethane
WO1991013969A1 (fr) Compositions azeotropiques ou analogues a l'azeotrope stabilisees a point d'ebullition constant de dichlorotrifluoroethane, 1,1-dichloro-1-fluoroethane comportant du methanol et/ou de l'ethanol
US5219488A (en) Azeotrope-like compositions of 2-trifluoromethyl-1,1,1,2-tetrafluorobutane and ethanol or isopropanol
US4086179A (en) Improved cleaning solvent containing non-azeotropic mixtures of 1,1,1-trichloroethane and n-propanol
AU608194B2 (en) Stabilized azeotrope or azeotrope-like composition of 1,1,2- trichloro-1,2,2-trifluoroethane, methanol and 1,2-dichloroethylene
US4052328A (en) Azeotrope-like compositions of trichlorotrifluoroethane, ethanol, isopropanol and nitromethane
KR890004173B1 (ko) 트리클로로트리플루오로 에탄, 메탄올, 아세톤 니트로메탄 및 헥산의 공비성 조성물
AU632016B2 (en) Azeotropic composition 2,2-dichloro-1,1,1-trifluoroethane and methanol
EP0444598A1 (fr) Compositions de solvants azéotropes
US5965511A (en) Cleaning or drying compositions based on 1,1,1,2,3,4,4,5,5,5-decafluoropentane
EP0429451B1 (fr) Composites du type azeotrope de dichlorotrifluoroethane, de methanol et de nitromethane
US4814100A (en) Azeotropic composition of 1,1-difluoro-2,2-dichloroethane and acetone
US4597890A (en) Solvent blend for removing flux residues
US5064558A (en) Azeotrope-like compositions of 1,1,2-tri-chloro-1,2,2-trifluoroethane, 1,2-dichloroethylene, cyclopentane, methanol, nitromethane and optionally diisopropylamine
US5039443A (en) Azeotropic composition of 2,2-dichloro-1,1,1-trifluoroethane and methanol

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AU BB BG BR CA FI HU JP KR LK MC MG MW NO PL RO SD SU

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE BF BJ CF CG CH CM DE DK ES FR GA GB GR IT LU ML MR NL SE SN TD TG

NENP Non-entry into the national phase

Ref country code: CA