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EP1040179A1 - Compositions comprising perfluorobutyl methyl ether and use of said compositions - Google Patents

Compositions comprising perfluorobutyl methyl ether and use of said compositions

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Publication number
EP1040179A1
EP1040179A1 EP98965826A EP98965826A EP1040179A1 EP 1040179 A1 EP1040179 A1 EP 1040179A1 EP 98965826 A EP98965826 A EP 98965826A EP 98965826 A EP98965826 A EP 98965826A EP 1040179 A1 EP1040179 A1 EP 1040179A1
Authority
EP
European Patent Office
Prior art keywords
weight
compositions
azeotropic
methyl ether
methyl
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP98965826A
Other languages
German (de)
French (fr)
Other versions
EP1040179B1 (en
Inventor
Pierre Barthelemy
Pierre Dournel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Solvay SA
Original Assignee
Solvay SA
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 Solvay SA filed Critical Solvay SA
Publication of EP1040179A1 publication Critical patent/EP1040179A1/en
Application granted granted Critical
Publication of EP1040179B1 publication Critical patent/EP1040179B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G11/00—Selection of substances for use as fixing agents
    • 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
    • C11D7/5004—Organic solvents
    • C11D7/5018—Halogenated solvents
    • 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
    • C11D7/504—Azeotropic mixtures containing halogenated solvents all solvents being halogenated hydrocarbons
    • C11D7/5063—Halogenated hydrocarbons containing heteroatoms, e.g. fluoro alcohols
    • 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
    • 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
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/266—Esters or carbonates
    • 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
    • C11D7/22—Organic compounds
    • C11D7/28—Organic compounds containing halogen

Definitions

  • compositions comprising perfluorobutyl methyl ether and use of these compositions
  • the invention relates to compositions comprising perfluorobutyl methyl ether (C4F9-O-CH3) and the use of these compositions, in particular as an agent for cleaning or drying solid surfaces.
  • Fully halogenated chlorofluorinated hydrocarbons (CFCs) in particular l, l, 2-trichloro-l, 2,2-trifluoroethane (CFC-113), are widely used as solvents in the industry for degreasing and surface cleaning various, particularly for solid parts of complicated shape and difficult to clean.
  • CFCs fully halogenated chlorofluorinated hydrocarbons
  • CFC-113 2-trichloro-l, 2,2-trifluoroethane
  • CFC-113 is most often combined with other organic solvents, preferably in the form of azeotropic or pseudo-azeotropic compositions having substantially the same composition in the vapor phase and in the liquid phase, so that 'They can be easily used at reflux.
  • compositions based on CFC-113 are also conventionally used as a desiccant, in order to remove the water adsorbed on the surface of solid parts.
  • CFC-113 like other completely halogenated chlorofluoroalkanes, is today suspected of being involved in the destruction of the stratospheric ozone layer.
  • Chlorine-free hydrofluorinated compounds are completely inert vis-à-vis the stratospheric ozone layer and there is an increasing use of these compounds in numerous applications to the detriment of compounds carrying chlorine atoms .
  • patent application WO 96/36689 proposes azeotropic compositions of perfluorobutyl methyl ether with one or more organic solvents chosen from linear or branched cyclic or acyclic alkanes comprising from 6 to 8 carbon atoms, the cyclic or acyclic ethers comprising from 4 to 6 carbon atoms, the ketones comprising 3 carbon atoms, the chlorinated alkanes comprising 1.3 or 4 carbon atoms, the chlorinated alkenes comprising 2 to 3 carbon atoms, alcohols comprising 1 to 4 carbon atoms, partially fluorinated alcohols comprising 2 to 3 carbon atoms, 1-bromopropane, acetonitrile, HCFC-225ea, and HC
  • One of the objectives of the present invention is to provide other compositions, optionally forming azeotropes or pseudo-azeotropes, which are particularly effective when used as a cleaning agent in solvent cleaning processes.
  • the invention also relates to such compositions having properties particularly suitable for cleaning printed circuit boards.
  • Another object of the invention is to provide such compositions devoid of destructive effect with respect to the ozone layer.
  • the invention also relates to compositions having properties which are particularly suitable as a toner fixing agent to a recording medium in a document printing or reproduction apparatus.
  • the present invention therefore relates to compositions comprising a perfluorobutyl methyl ether and a cosolvent. It relates more particularly to compositions comprising a perfluorobutyl methyl ether of general formula C4F9-O-CH3 where C4F9 is a linear or branched perfluorinated chain and an organic solvent having an ester function.
  • CF3- (CF2) 3-O-CH3, (CF3) 2CF-CF2-O-CH3 and their mixtures are the preferred perfluorobutyl methyl ethers.
  • the term "perfluorobutyl methyl ether" is used to denote a mixture of these 2 compounds, marketed by 3M under the name HFE-7100.
  • organic compounds comprising an ester function
  • thermodynamic state of a fluid is defined by four interdependent variables: pressure (P), temperature (T), composition of the liquid phase (X) and the composition of the gas phase (Y).
  • P pressure
  • T temperature
  • X composition of the liquid phase
  • Y composition of the gas phase
  • a true azeotrope is a particular system with 2 or more components for which, at a given temperature and at a given pressure, the composition of the liquid phase X is exactly equal to the composition of the gas phase Y.
  • a pseudo-azeotrope is a 2 or more component system for which, at a given temperature and at a given pressure, X is substantially equal to Y.
  • X is substantially equal to Y.
  • pseudo-azeotropic mixture is understood to mean a mixture of two constituents whose boiling point (at a given pressure) differs from the boiling point of the true azeotrope by 0.5 ° C. at maximum. Mixtures whose boiling point differs from the boiling point of the true azeotrope by a maximum of 0.2 ° C are preferred. Mixtures whose boiling point differs from the boiling point of the true azeotrope by 0.1 ° C maximum are particularly preferred.
  • perfluorobutyl methyl ether and ester contents in the compositions according to the invention can vary within wide limits, depending on the use envisaged.
  • compositions according to the invention contain at least 1% by weight of perfluorobutyl methyl ether. They advantageously contain at least 5%. In a particularly preferred manner, they contain at least 10% thereof. They can contain up to 99%. Most often, they contain at most 95%.
  • compositions according to the invention are those which contain perfluorobutyl methyl ether and an ester in proportions in which they form an azeotrope or a pseudo-azeotrope with minimum boiling point.
  • compositions of the azeotropic mixtures according to the invention were estimated on the basis of the results of the experimental measurements presented in the examples below.
  • Perfluorobutyl methyl ether and methyl acetate form a binary azeotrope or pseudo-azeotrope when their mixture contains approximately 21 to 52% by weight of methyl acetate.
  • Binary compositions containing about 28 to 48% by weight of methyl acetate are preferred.
  • the binary composition consisting essentially of approximately 61% by weight of perfluorobutyl methyl ether and approximately 39% by weight of methyl acetate constitutes a true azeotrope, the boiling point of which is about 52.6 ° C. This composition is very particularly preferred.
  • Perfluorobutyl methyl ether and ethyl formate form a binary azeotrope or pseudo-azeotrope when their mixture contains approximately 22 to 53% by weight of ethyl formate.
  • Binary compositions containing about 26 to 46% by weight of ethyl formate are preferred.
  • the binary composition consisting essentially of approximately 68% by weight of perfluorobutyl methyl ether and approximately 32% by weight of ethyl formate constitutes a true azeotrope, the boiling point of which is about 50.2 ° C. This composition is very particularly preferred.
  • Perfluorobutyl methyl ether and methyl formate form a binary azeotrope or pseudo-azeotrope when their mixture contains approximately 40 to 92% by weight of methyl formate.
  • Binary compositions containing about 59 to 80% by weight of methyl formate are preferred.
  • the binary composition consisting essentially of approximately 36% by weight of perfluorobutyl methyl ether and approximately 64% by weight of methyl formate constitutes a true azeotrope, the boiling point of which is d '' about 31.2 ° C. This composition is very particularly preferred.
  • compositions according to the invention can optionally be present in the compositions according to the invention.
  • the compositions according to the invention can thus contain stabilizers, surfactants or any other additives making it possible to improve the performance of the compositions according to the invention during their use.
  • the nature and the quantity of these additives depend on the intended use and are easily defined by a person skilled in the art. As a general rule, the amount of additives present in the compositions according to the invention does not exceed approximately 20% of the weight of the composition, most often not more than 10%.
  • compositions according to the invention have an adequate boiling point to replace the compositions based on CFC-113 in existing cleaning equipment. With regard to its impact on the environment, perfluorobutyl methyl ether appears to be particularly interesting, since it has zero ozone destruction potential.
  • the compositions according to the invention are also inert to the various types of surfaces to be treated, whether these are made of metal, plastic or glass.
  • compositions according to the invention can therefore be used in the same applications and according to the same techniques as the previous compositions based on CFC-113.
  • the compositions according to the invention can be used as cleaning agent, solvent, degreaser, defluxing or desiccant.
  • the invention therefore also relates to the use of the compositions according to the invention as a cleaning agent, as a degreasing agent for solid surfaces, as a cleaning agent for printed circuit boards, contaminated with a flux of stripper and residues of this flux or as a desiccant to remove water adsorbed on the surface of solid objects.
  • Perfluorobutyl methyl ether the compositions containing it, and in particular the compositions according to the invention, can also be used as agent for fixing a toner to a recording medium in a document printing or reproduction apparatus.
  • compositions based on perfluorobutyl methyl ether which can be used as a toner fixing agent are compositions containing a C3-C6 hydrofluorocarbon.
  • C3-C6 hydrofluorocarbon is intended to denote saturated, aliphatic or alicyclic hydrocarbons, consisting solely of carbon, fluorine and hydrogen, comprising from 3 to 6 carbon atoms, at least one fluorine atom and at least one atom. hydrogen.
  • C3-C6 hydrofluorocarbons are hydrofluoroalkanes such as 1,1,1,3,3-pentafluoropropane (HFC-245fa), 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,4,6,6,6,6-decafluoropentane (HFC-43-10mee).
  • 1,1,1,3,3 -pentafluorobutane is particularly suitable.
  • ternary perfluorobutyl methyl ether / ester / hydrofluorocarbon C 3 -C 6 compositions are used.
  • the invention therefore also relates to the use of perfluorobutyl methyl ether, compositions containing it, and in particular, compositions according to the invention as agent for fixing a toner to a recording medium in a printing or reproduction of documents.
  • a precisely determined quantity of pure perfluorobutyl methyl ether was heated under a known pressure to boiling point, then small quantities of ester, weighed with precision, were gradually introduced into the vial by means of a syringe, via a lateral tubing.
  • the azeotropic composition was determined by recording the evolution of the boiling point of the mixture as a function of its composition.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Detergent Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

Perfluorobutyl methyl ether forms azeotropic or pseudoazeotropic compositions with esters. These compositions can be used in particular as solvent for cleaning and defluxing electronic components, for degreasing metals, for removing water adsorbed at the surface of solids and for fixing a toner to a printing substrate.

Description

Compositions comprenant du perfluorobutyl méthyl éther et utilisation de ces compositions Compositions comprising perfluorobutyl methyl ether and use of these compositions
L'invention concerne des compositions comprenant du perfluorobutyl méthyl éther (C4F9-O-CH3) et l'utilisation de ces compositions, notamment comme agent de nettoyage ou de séchage de surfaces solides. Les hydrocarbures chlorofluorés complètement halogènes (CFC), en particulier le l,l,2-trichloro-l,2,2-trifluoroéthane (CFC-113), sont largement utilisés comme solvants dans l'industrie pour le dégraissage et le nettoyage de surfaces diverses, particulièrement pour des pièces solides de forme compliquée et difficiles à nettoyer. Outre leur utilisation en électronique, dans le nettoyage des flux de soudure pour éliminer le flux décapant qui adhère aux circuits imprimés, ils sont également classiquement utilisés pour dégraisser des pièces métalliques ou pour nettoyer des pièces mécaniques de haute qualité et de grande précision. Dans ces diverses applications, le CFC-113 est le plus souvent associé à d'autres solvants organiques, de préférence sous forme de compositions azéotropiques ou pseudo-azéotropiques ayant sensiblement la même composition dans la phase vapeur et dans la phase liquide, de sorte qu'elles peuvent être aisément employées au reflux.The invention relates to compositions comprising perfluorobutyl methyl ether (C4F9-O-CH3) and the use of these compositions, in particular as an agent for cleaning or drying solid surfaces. Fully halogenated chlorofluorinated hydrocarbons (CFCs), in particular l, l, 2-trichloro-l, 2,2-trifluoroethane (CFC-113), are widely used as solvents in the industry for degreasing and surface cleaning various, particularly for solid parts of complicated shape and difficult to clean. In addition to their use in electronics, in the cleaning of solder fluxes to eliminate the flux flux which adheres to printed circuits, they are also conventionally used to degrease metal parts or to clean high quality and high precision mechanical parts. In these various applications, CFC-113 is most often combined with other organic solvents, preferably in the form of azeotropic or pseudo-azeotropic compositions having substantially the same composition in the vapor phase and in the liquid phase, so that 'They can be easily used at reflux.
Des compositions à base de CFC-113 sont aussi classiquement utilisées comme agent dessicatif, afin d'éliminer l'eau adsorbée à la surface de pièces solides.Compositions based on CFC-113 are also conventionally used as a desiccant, in order to remove the water adsorbed on the surface of solid parts.
Toutefois, le CFC-113, de même que d'autres chlorofluoroalcanes complètement halogènes, est aujourd'hui suspecté d'être impliqué dans la destruction de la couche d'ozone stratosphérique.However, CFC-113, like other completely halogenated chlorofluoroalkanes, is today suspected of being involved in the destruction of the stratospheric ozone layer.
En conséquence, il y a actuellement un besoin urgent de trouver de nouvelles compositions, n'ayant pas d'influence néfaste sur la couche d'ozone.Consequently, there is currently an urgent need to find new compositions, having no harmful influence on the ozone layer.
Les composés hydrofluorés exempts de chlore sont totalement inertes vis-à- vis de la couche d'ozone stratosphérique et l'on constate une utilisation de plus en plus large de ces composés dans de nombreuses applications au détriment des composés porteurs d'atomes de chlore. A cette fin, la demande de brevet WO 96/36689 propose des compositions azéotropiques de perfluorobutyl méthyl éther avec un ou plusieurs solvants organiques choisis parmi les alcanes linéaires ou ramifiés cycliques ou acycliques comprenant de 6 à 8 atomes de carbone, les éthers cycliques ou acycliques comprenant de 4 à 6 atomes de carbone, les cétones comprenant 3 atomes de carbone, les alcanes chlorés comprenant 1,3 ou 4 atomes de carbone, les alcènes chlorés comprenant 2 à 3 atomes de carbone, les alcools comprenant 1 à 4 atomes de carbone, les alcools partiellement fluorés comprenant 2 à 3 atomes de carbone, le 1-bromopropane, l'acétonitrile, le HCFC-225ea, et le HCFC-225cb.Chlorine-free hydrofluorinated compounds are completely inert vis-à-vis the stratospheric ozone layer and there is an increasing use of these compounds in numerous applications to the detriment of compounds carrying chlorine atoms . To this end, patent application WO 96/36689 proposes azeotropic compositions of perfluorobutyl methyl ether with one or more organic solvents chosen from linear or branched cyclic or acyclic alkanes comprising from 6 to 8 carbon atoms, the cyclic or acyclic ethers comprising from 4 to 6 carbon atoms, the ketones comprising 3 carbon atoms, the chlorinated alkanes comprising 1.3 or 4 carbon atoms, the chlorinated alkenes comprising 2 to 3 carbon atoms, alcohols comprising 1 to 4 carbon atoms, partially fluorinated alcohols comprising 2 to 3 carbon atoms, 1-bromopropane, acetonitrile, HCFC-225ea, and HCFC-225cb.
Un des objectifs de la présente invention est de fournir d'autres compositions formant éventuellement des azéotropes ou des pseudo-azéotropes, qui soient particulièrement performantes lorsqu'elles sont utilisées comme agent de nettoyage dans des procédés de nettoyage par solvant. L'invention a encore pour objet de telles compositions possédant des propriétés particulièrement adaptées au nettoyage de cartes de circuits imprimés. Un autre objectif de l'invention est de fournir de telles compositions dépourvues d'effet destructeur vis-à-vis de la couche d'ozone. L'invention a également pour objet des compositions possédant des propriétés particulièrement adaptées comme agent fixateur d'un toner à un support d'enregistrement dans un appareil d'impression ou de reproduction de documents.One of the objectives of the present invention is to provide other compositions, optionally forming azeotropes or pseudo-azeotropes, which are particularly effective when used as a cleaning agent in solvent cleaning processes. The invention also relates to such compositions having properties particularly suitable for cleaning printed circuit boards. Another object of the invention is to provide such compositions devoid of destructive effect with respect to the ozone layer. The invention also relates to compositions having properties which are particularly suitable as a toner fixing agent to a recording medium in a document printing or reproduction apparatus.
La présente invention concerne dès lors des compositions comprenant un perfluorobutyl méthyl éther et un cosolvant. Elle concerne plus particulièrement les compositions comprenant un perfluorobutyl méthyl éther de formule générale C4F9-O-CH3 où C4F9 est une chaîne perfluorée linéaire ou ramifiée et un solvant organique possédant une fonction ester. Le CF3-(CF2)3-O-CH3, le (CF3)2CF-CF2-O-CH3 et leurs mélanges sont les perfluorobutyl méthyl éthers préférés. Dans la suite de l'exposé, le terme "perfluorobutyl méthyl éther" est utilisé pour désigner un mélange de ces 2 composés, commercialisé par 3M sous la dénomination HFE-7100. A titre d'exemple de composés organiques comportant une fonction ester, on peut citer le formiate de méthyle, le formiate d'éthyle, le formiate de propyle, l'acétate de méthyle, l'acétate d'éthyle, l'acétate de propyle, le propionate de méthyle, le propionate d'éthyle, le propionate de propyle.The present invention therefore relates to compositions comprising a perfluorobutyl methyl ether and a cosolvent. It relates more particularly to compositions comprising a perfluorobutyl methyl ether of general formula C4F9-O-CH3 where C4F9 is a linear or branched perfluorinated chain and an organic solvent having an ester function. CF3- (CF2) 3-O-CH3, (CF3) 2CF-CF2-O-CH3 and their mixtures are the preferred perfluorobutyl methyl ethers. In the remainder of the description, the term "perfluorobutyl methyl ether" is used to denote a mixture of these 2 compounds, marketed by 3M under the name HFE-7100. By way of example of organic compounds comprising an ester function, mention may be made of methyl formate, ethyl formate, propyl formate, methyl acetate, ethyl acetate, propyl acetate , methyl propionate, ethyl propionate, propyl propionate.
Le formiate de méthyle, le formiate d'éthyle, l'acétate de méthyle et l'acétate d'éthyle sont préférés. Le formiate de méthyle, le formiate d'éthyle et l'acétate de méthyle sont particulièrement préférés. Fondamentalement, l'état thermodynamique d'un fluide est défini par quatre variables interdépendantes : la pression (P), la température (T), la composition de la phase liquide (X) et la composition de la phase gazeuse (Y). Un azéotrope vrai est un système particulier à 2 ou plusieurs composants pour lequel, à une température donnée et à une pression donnée, la composition de la phase liquide X est exactement égale à la composition de la phase gazeuse Y. Un pseudo-azéotrope est un système à 2 ou plusieurs composants pour lequel, à une température donnée et à une pression donnée, X est substantiellement égal à Y. En pratique, cela signifie que les constituants de tels systèmes azéotropiques et pseudo-azéotropiques ne peuvent pas être séparés facilement par distillation et dès lors leur composition reste substantiellement constante dans les opérations de nettoyage par solvant, ainsi que dans les opérations de récupération de solvants usagés par distillation.Methyl formate, ethyl formate, methyl acetate and ethyl acetate are preferred. Methyl formate, ethyl formate and methyl acetate are particularly preferred. Basically, the thermodynamic state of a fluid is defined by four interdependent variables: pressure (P), temperature (T), composition of the liquid phase (X) and the composition of the gas phase (Y). A true azeotrope is a particular system with 2 or more components for which, at a given temperature and at a given pressure, the composition of the liquid phase X is exactly equal to the composition of the gas phase Y. A pseudo-azeotrope is a 2 or more component system for which, at a given temperature and at a given pressure, X is substantially equal to Y. In practice, this means that the constituents of such azeotropic and pseudo-azeotropic systems cannot be separated easily by distillation and therefore their composition remains substantially constant in the solvent cleaning operations, as well as in the recovery operations of used solvents by distillation.
Aux fins de la présente invention, on entend par mélange pseudo-azéotropique, un mélange de deux constituants dont le point d'ébuUition (à une pression donnée) diffère du point d'ébuUition de l'azéotrope vrai de 0,5 °C au maximum. Les mélanges dont le point d'ébuUition diffère du point d'ébuUition de l'azéotrope vrai de 0,2 °C au maximum sont préférés. Les mélanges dont le point d'ébuUition diffère du point d'ébuUition de l'azéotrope vrai de 0,1 °C au maximum sont particulièrement préférés.For the purposes of the present invention, the term pseudo-azeotropic mixture is understood to mean a mixture of two constituents whose boiling point (at a given pressure) differs from the boiling point of the true azeotrope by 0.5 ° C. at maximum. Mixtures whose boiling point differs from the boiling point of the true azeotrope by a maximum of 0.2 ° C are preferred. Mixtures whose boiling point differs from the boiling point of the true azeotrope by 0.1 ° C maximum are particularly preferred.
Les teneurs en perfluorobutyl méthyl éther et en ester dans les compositions selon l'invention peuvent varier dans de larges mesures, selon l'utilisation envisagée.The perfluorobutyl methyl ether and ester contents in the compositions according to the invention can vary within wide limits, depending on the use envisaged.
Généralement, les compositions selon l'invention contiennent au moins 1 % en poids de perfluorobutyl méthyl éther. Elles en contiennent avantageusement au moins 5 %. De manière particulièrement préférée, elles en contiennent au moins 10 %. Elles peuvent en contenir jusqu'à 99 %. Le plus souvent, elles en contiennent au plus 95 %.Generally, the compositions according to the invention contain at least 1% by weight of perfluorobutyl methyl ether. They advantageously contain at least 5%. In a particularly preferred manner, they contain at least 10% thereof. They can contain up to 99%. Most often, they contain at most 95%.
Des compositions selon l'invention tout particulièrement préférées sont celles qui contiennent le perfluorobutyl méthyl éther et un ester dans des proportions dans lesqueUes ils forment un azéotrope ou un pseudo-azéotrope à point d'ébuUition minimum.Very particularly preferred compositions according to the invention are those which contain perfluorobutyl methyl ether and an ester in proportions in which they form an azeotrope or a pseudo-azeotrope with minimum boiling point.
Les compositions des mélanges azéotropiques selon l'invention ont été estimées sur base des résultats des mesures expérimentales présentées dans les exemples ci-après.The compositions of the azeotropic mixtures according to the invention were estimated on the basis of the results of the experimental measurements presented in the examples below.
Le perfluorobutyl méthyl éther et l'acétate de méthyle forment un azéotrope ou un pseudo-azéotrope binaire lorsque leur mélange contient environ de 21 à 52 % en poids d'acétate de méthyle. Les compositions binaires contenant environ de 28 à 48 % en poids d'acétate de méthyle sont préférées. Sous une pression de 102,3 kPa, la composition binaire constituée essentiellement d'environ 61 % en poids de perfluorobutyl méthyl éther et d'environ 39 % en poids d'acétate de méthyle constitue un azéotrope vrai, dont le point d'ébuUition est d'environ 52,6 °C. Cette composition est tout particulièrement préférée.Perfluorobutyl methyl ether and methyl acetate form a binary azeotrope or pseudo-azeotrope when their mixture contains approximately 21 to 52% by weight of methyl acetate. Binary compositions containing about 28 to 48% by weight of methyl acetate are preferred. At a pressure of 102.3 kPa, the binary composition consisting essentially of approximately 61% by weight of perfluorobutyl methyl ether and approximately 39% by weight of methyl acetate constitutes a true azeotrope, the boiling point of which is about 52.6 ° C. This composition is very particularly preferred.
Le perfluorobutyl méthyl éther et le formiate d'éthyle forment un azéotrope ou un pseudo-azéotrope binaire lorsque leur mélange contient environ de 22 à 53 % en poids de formiate d'éthyle. Les compositions binaires contenant environ de 26 à 46 % en poids de formiate d'éthyle sont préférées. Sous une pression de 102,6 kPa, la composition binaire constituée essentiellement d'environ 68 % en poids de perfluorobutyl méthyl éther et d'environ 32 % en poids de formiate d'éthyle constitue un azéotrope vrai, dont le point d'ébuUition est d'environ 50,2 °C. Cette composition est tout particuUèrement préférée.Perfluorobutyl methyl ether and ethyl formate form a binary azeotrope or pseudo-azeotrope when their mixture contains approximately 22 to 53% by weight of ethyl formate. Binary compositions containing about 26 to 46% by weight of ethyl formate are preferred. At a pressure of 102.6 kPa, the binary composition consisting essentially of approximately 68% by weight of perfluorobutyl methyl ether and approximately 32% by weight of ethyl formate constitutes a true azeotrope, the boiling point of which is about 50.2 ° C. This composition is very particularly preferred.
Le perfluorobutyl méthyl éther et le formiate de méthyle forment un azéotrope ou un pseudo-azéotrope binaire lorsque leur mélange contient environ de 40 à 92 % en poids de formiate de méthyle. Les compositions binaires contenant environ de 59 à 80 % en poids de formiate de méthyle sont préférées. Sous une pression de 102,2 kPa, la composition binaire constituée essentieUement d'environ 36 % en poids de perfluorobutyl méthyl éther et d'environ 64 % en poids de formiate de méthyle constitue un azéotrope vrai, dont le point d'ébuUition est d'environ 31,2 °C. Cette composition est tout particulièrement préférée.Perfluorobutyl methyl ether and methyl formate form a binary azeotrope or pseudo-azeotrope when their mixture contains approximately 40 to 92% by weight of methyl formate. Binary compositions containing about 59 to 80% by weight of methyl formate are preferred. At a pressure of 102.2 kPa, the binary composition consisting essentially of approximately 36% by weight of perfluorobutyl methyl ether and approximately 64% by weight of methyl formate constitutes a true azeotrope, the boiling point of which is d '' about 31.2 ° C. This composition is very particularly preferred.
Divers additifs peuvent éventuellement être présents dans les compositions selon l'invention. Les compositions selon l'invention peuvent ainsi contenir des stabilisants, des agents tensioactifs ou tous autres additifs permettant d'améliorer les performances des compositions selon l'invention lors de leur utilisation. La nature et la quantité de ces additifs sont fonction de l'utilisation envisagée et sont aisément définies par l'homme du métier. En règle générale, la quantité d'additifs présente dans les compositions selon l'invention ne dépasse pas environ 20 % du poids de la composition, le plus souvent pas plus de 10 %.Various additives can optionally be present in the compositions according to the invention. The compositions according to the invention can thus contain stabilizers, surfactants or any other additives making it possible to improve the performance of the compositions according to the invention during their use. The nature and the quantity of these additives depend on the intended use and are easily defined by a person skilled in the art. As a general rule, the amount of additives present in the compositions according to the invention does not exceed approximately 20% of the weight of the composition, most often not more than 10%.
Les compositions selon l'invention présentent un point d'ébuUition adéquat pour remplacer les compositions à base de CFC-113 dans les appareillages de nettoyage existants. En ce qui concerne son impact sur l'environnement, le perfluorobutyl méthyl éther apparaît particulièrement intéressant, puisqu'il présente un potentiel de destruction de l'ozone nul. Les compositions selon l'invention sont en outre inertes à l' encontre des différents types de surfaces à traiter, que celles-ci soient en métal, en plastique ou en verre.The compositions according to the invention have an adequate boiling point to replace the compositions based on CFC-113 in existing cleaning equipment. With regard to its impact on the environment, perfluorobutyl methyl ether appears to be particularly interesting, since it has zero ozone destruction potential. The compositions according to the invention are also inert to the various types of surfaces to be treated, whether these are made of metal, plastic or glass.
Les compositions selon l'invention peuvent dès lors être utilisées dans les mêmes applications et selon les mêmes techniques que les compositions antérieures à base de CFC-113. En particulier, les compositions selon l'invention peuvent être utilisées comme agent de nettoyage, solvant, dégraissant, défluxant ou dessicatif.The compositions according to the invention can therefore be used in the same applications and according to the same techniques as the previous compositions based on CFC-113. In particular, the compositions according to the invention can be used as cleaning agent, solvent, degreaser, defluxing or desiccant.
L'invention concerne dès lors aussi l'utilisation des compositions selon l'invention comme agent de nettoyage, comme agent dégraissant de surfaces solides, comme agent de nettoyage de cartes de circuits imprimés, contaminées par un flux décapant et des résidus de ce flux ou comme agent dessicatif pour éliminer l'eau adsorbée à la surface d'objets solides.The invention therefore also relates to the use of the compositions according to the invention as a cleaning agent, as a degreasing agent for solid surfaces, as a cleaning agent for printed circuit boards, contaminated with a flux of stripper and residues of this flux or as a desiccant to remove water adsorbed on the surface of solid objects.
Le perfluorobutyl méthyl éther, les compositions en contenant, et en particulier, les compositions selon l'invention, peuvent également être utilisées comme agent fixateur d'un toner à un support d'enregistrement dans un appareil d'impression ou de reproduction de documents.Perfluorobutyl methyl ether, the compositions containing it, and in particular the compositions according to the invention, can also be used as agent for fixing a toner to a recording medium in a document printing or reproduction apparatus.
Des compositions à base de perfluorobutyl méthyl éther utilisables comme agent fixateur d'un toner sont des compositions contenant un hydrofluorocarbure en C3-C6. Par hydrofluorocarbure en C3-C6, on entend désigner les hydrocarbures saturés, aliphatiques ou alicycliques, constitués uniquement de carbone, de fluor et d'hydrogène, comprenant de 3 à 6 atomes de carbone, au moins un atome de fluor et au moins un atome d'hydrogène. Des exemples typiques d'hydrofluorocarbures en C3-C6 sont des hydrofluoroalcanes tels que le 1,1,1,3,3-pentafluoropropane (HFC-245fa), le 1,1,1,3,3-pentafluorobutane (HFC-365mfc) et le 1,1,1,2,2,3,4,6,6,6-décafluoropentane (HFC-43-10mee). Le 1,1,1 ,3 ,3 -pentafluorobutane convient particulièrement bien. De préférence, on utilise des compositions ternaires perfluorobutyl méthyl éther/ester/hydrofluoro- carbure en C3-C6.Compositions based on perfluorobutyl methyl ether which can be used as a toner fixing agent are compositions containing a C3-C6 hydrofluorocarbon. The term “C3-C6 hydrofluorocarbon” is intended to denote saturated, aliphatic or alicyclic hydrocarbons, consisting solely of carbon, fluorine and hydrogen, comprising from 3 to 6 carbon atoms, at least one fluorine atom and at least one atom. hydrogen. Typical examples of C3-C6 hydrofluorocarbons are hydrofluoroalkanes such as 1,1,1,3,3-pentafluoropropane (HFC-245fa), 1,1,1,3,3-pentafluorobutane (HFC-365mfc) and 1,1,1,2,2,3,4,6,6,6,6-decafluoropentane (HFC-43-10mee). 1,1,1,3,3 -pentafluorobutane is particularly suitable. Preferably, ternary perfluorobutyl methyl ether / ester / hydrofluorocarbon C 3 -C 6 compositions are used.
L'invention concerne dès lors aussi l'utilisation du perfluorobutyl méthyl éther, des compositions en contenant, et en particulier, des compositions selon l'invention comme agent fixateur d'un toner à un support d'enregistrement dans un appareil d'impression ou de reproduction de documents.The invention therefore also relates to the use of perfluorobutyl methyl ether, compositions containing it, and in particular, compositions according to the invention as agent for fixing a toner to a recording medium in a printing or reproduction of documents.
Les exemples ci-après, non limitatifs, illustrent l'invention de manière plus détaillée. Exemples 1-3The following non-limiting examples illustrate the invention in more detail. Examples 1-3
Pour mettre en évidence l'existence de compositions azéotropiques ou pseudo-azéotropiques selon l'invention entre le perfluorobutyl méthyl éther et un ester, on a utilisé un appareillage en verre constitué d'un flacon bouilleur de 50 ml surmonté d'un condenseur à reflux. La température du liquide a été mesurée au moyen d'un thermomètre plongeant dans le flacon.To demonstrate the existence of azeotropic or pseudo-azeotropic compositions according to the invention between perfluorobutyl methyl ether and an ester, glass apparatus consisting of a 50 ml boiling flask surmounted by a reflux condenser was used. . The temperature of the liquid was measured using a thermometer immersed in the bottle.
Une quantité de perfluorobutyl méthyl éther pur déterminée avec précision a été chauffée sous une pression connue jusqu' à ébullition, puis de petites quantités d'ester, pesées avec précision, ont été progressivement introduites dans le flacon au moyen d'une seringue, via une tubulure latérale.A precisely determined quantity of pure perfluorobutyl methyl ether was heated under a known pressure to boiling point, then small quantities of ester, weighed with precision, were gradually introduced into the vial by means of a syringe, via a lateral tubing.
La détermination de la composition azéotropique a été réalisée par un relevé de l'évolution de la température d'ébuUition du mélange en fonction de sa composition.The azeotropic composition was determined by recording the evolution of the boiling point of the mixture as a function of its composition.
Ces mesures ont été réaUsées pour des mélanges contenant du perfluorobutyl méthyl éther et des quantités croissantes d'acétate de méthyle (exemple 1), de formiate d'éthyle (exemple 2) et de formiate de méthyle (exemple 3).These measurements were carried out for mixtures containing perfluorobutyl methyl ether and increasing amounts of methyl acetate (Example 1), ethyl formate (Example 2) and methyl formate (Example 3).
La pression à laquelle les mesures ont été prises est mentionnée. Les résultats obtenus sont présentés dans le tableau I. The pressure at which the measures were taken is mentioned. The results obtained are presented in Table I.
Tableau ITable I

Claims

R E N E N D I C A T I O N S R E N E N D I C A T I O N S
1 - Composition comprenant au moins un perfluorobutyl méthyl éther de formule C4F9-O-CH3 dans laquelle C4F9 représente une chaîne perfluorée linéaire ou branchée et au moins un ester.1 - Composition comprising at least one perfluorobutyl methyl ether of formula C4F9-O-CH3 in which C4F9 represents a linear or branched perfluorinated chain and at least one ester.
2 - Composition selon la revendication 1 dans laquelle le perfluorobutyl méthyl éther est choisi parmi le CF3-(CF2)3-O-CH3, le (CF3)2CF-CF2-O-CH3 et leurs mélanges.2 - Composition according to claim 1 wherein the perfluorobutyl methyl ether is chosen from CF 3 - (CF 2 ) 3-O-CH 3 , (CF 3 ) 2 CF-CF2-O-CH3 and mixtures thereof.
3 - Composition selon la revendication 1 caractérisée en ce que l'ester est choisi parmi l'acétate d'éthyle, l'acétate de méthyle, le formiate d'éthyle et le formiate de méthyle.3 - Composition according to claim 1 characterized in that the ester is chosen from ethyl acetate, methyl acetate, ethyl formate and methyl formate.
4 - Composition azéotropique ou pseudo-azéotropique selon la revendication 1 caractérisée en ce que l'ester est choisi parmi l'acétate de méthyle, le formiate d'éthyle et le formiate de méthyle.4 - Azeotropic or pseudo-azeotropic composition according to claim 1 characterized in that the ester is chosen from methyl acetate, ethyl formate and methyl formate.
5 - Composition selon la revendication 4 contenant environ 21 à 52 % en poids d'acétate de méthyle ou environ 22 à 53 % en poids de formiate d'éthyle ou environ 40 à 92 % en poids de formiate de méthyle.5 - Composition according to claim 4 containing about 21 to 52% by weight of methyl acetate or about 22 to 53% by weight of ethyl formate or about 40 to 92% by weight of methyl formate.
6 - Composition selon la revendication 4 contenant environ 28 à 48 % en poids d'acétate de méthyle ou environ 26 à 46 % en poids de formiate d'éthyle ou environ 59 à 80 % en poids de formiate de méthyle.6 - Composition according to claim 4 containing about 28 to 48% by weight of methyl acetate or about 26 to 46% by weight of ethyl formate or about 59 to 80% by weight of methyl formate.
7 - Composition azéotropique à point d'ébuUition minimum selon la revendication 4, composée d'environ 61 % en poids de perfluorobutyl méthyl éther et d'environ 39 % en poids d'acétate de méthyle, dont le point d'ébuUition est d'environ 52,6 °C sous une pression de 102,3 kPa.7 - Azeotropic composition with minimum boiling point according to claim 4, composed of approximately 61% by weight of perfluorobutyl methyl ether and approximately 39% by weight of methyl acetate, the boiling point of which is about 52.6 ° C under a pressure of 102.3 kPa.
8 - Composition azéotropique à point d'ébuUition minimum selon la revendication 4, composée d'environ 68 % en poids de perfluorobutyl méthyl éther et d'environ 32 % en poids de formiate d'éthyle, dont le point d'ébuUition est d'environ 50,2 °C sous une pression de 102,6 kPa.8 - Azeotropic composition with minimum boiling point according to claim 4, composed of approximately 68% by weight of perfluorobutyl methyl ether and approximately 32% by weight of ethyl formate, the boiling point of which is about 50.2 ° C under a pressure of 102.6 kPa.
9 - Composition azéotropique à point d'ébuUition minimum selon la revendication 4, composée d'environ 36 % en poids de perfluorobutyl méthyl éther et d'environ 64 % en poids de formiate de méthyle, dont le point d'ébuUition est d'environ 31,2 °C sous une pression de 102,2 kPa.9 - Azeotropic composition with minimum boiling point according to claim 4, composed of approximately 36% by weight of perfluorobutyl methyl ether and about 64% by weight of methyl formate, the boiling point of which is about 31.2 ° C under a pressure of 102.2 kPa.
10 - Utilisation des compositions azéotropiques ou pseudo-azéotropiques selon l'une quelconque des revendications 1 à 9 comme agent de nettoyage, comme agent dégraissant de surfaces solides, comme agent de nettoyage de cartes de circuits imprimés contaminées par un flux décapant et des résidus de ce flux ou comme agent dessicatif pour éliminer l'eau adsorbée à la surface d'objets soUdes.10 - Use of the azeotropic or pseudo-azeotropic compositions according to any one of claims 1 to 9 as a cleaning agent, as a degreasing agent for solid surfaces, as a cleaning agent for printed circuit boards contaminated with a flux of stripper and residues of this flow or as a desiccant to remove the water adsorbed on the surface of solid objects.
11 - Composition selon l'une quelconque des revendications 1 à 9, contenant en outre un hydrofluorocarbure en C3-C6.11 - Composition according to any one of claims 1 to 9, further containing a C3-C6 hydrofluorocarbon.
12 - Utilisation du perfluorobutyl méthyl éther, des compositions en contenant, et en particulier, des compositions azéotropiques ou pseudo- azéotropiques selon l'une quelconque des revendications 1 à 9 et 11 comme agent fixateur d'un toner à un support d'enregistrement dans un appareil d'impression ou de reproduction de documents. 12 - Use of perfluorobutyl methyl ether, compositions containing it, and in particular, azeotropic or pseudo-azeotropic compositions according to any one of claims 1 to 9 and 11 as agent for fixing a toner to a recording medium in a device for printing or reproducing documents.
EP98965826A 1997-12-15 1998-12-12 Compositions comprising perfluorobutyl methyl ether and use of said compositions Expired - Lifetime EP1040179B1 (en)

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