EP0445438B1 - Mélange de solvents pseudoazéotropes et procédé de nettoyage d'éléments électroniques à l'aide du dit mélange - Google Patents

Mélange de solvents pseudoazéotropes et procédé de nettoyage d'éléments électroniques à l'aide du dit mélange Download PDF

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Publication number
EP0445438B1
EP0445438B1 EP90125837A EP90125837A EP0445438B1 EP 0445438 B1 EP0445438 B1 EP 0445438B1 EP 90125837 A EP90125837 A EP 90125837A EP 90125837 A EP90125837 A EP 90125837A EP 0445438 B1 EP0445438 B1 EP 0445438B1
Authority
EP
European Patent Office
Prior art keywords
azeotrope
weight
mixture
methanol
electronic components
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.)
Expired - Lifetime
Application number
EP90125837A
Other languages
German (de)
English (en)
Other versions
EP0445438A1 (fr
Inventor
Horst Robeck
Hans-Matthias Dr. Deger
Klaus Dr. Raab
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
Hoechst AG
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 Hoechst AG filed Critical Hoechst AG
Publication of EP0445438A1 publication Critical patent/EP0445438A1/fr
Application granted granted Critical
Publication of EP0445438B1 publication Critical patent/EP0445438B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C23G5/02803—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 fluorine

Definitions

  • 1,4-dihydroperfluorobutane (CHF 2 -CF 2 -CF 2 -CHF 2 ) forms an azeotrope-like solvent mixture with methanol, which is excellent for cleaning electronic components, in particular soldered circuit boards or printed circuits, especially for removal of soldering flux is suitable.
  • the invention relates to an azeotrope-like mixture which contains about 3-5% by weight of methanol and about 95-97% by weight of 1,4-dihydroperfluorobutane.
  • the mixture preferably contains 3.2-4.0% by weight of methanol, in particular 3.4-3.6% by weight of methanol, the remainder being 1,4-dihydroperfluorobutane in each case.
  • Another object of the invention is a method for cleaning electronic components, in particular soldered circuit boards or printed circuits, which is characterized in that the components are washed with an azeotrope-like mixture containing about 3-5% by weight of methanol and 95-97 Wt .-% 1,4-dihydroperfluorobutane contains.
  • a mixture is preferably used which contains 3.2-4.0% by weight of methanol, in particular 3.4-3.6% by weight of methanol, the remainder being essentially 1,4-dihydroperfluorobutane.
  • a particularly preferred solvent mixture contains 96.5% by weight of 1,4-dihydroperfluorobutane and 3.5% by weight of methanol and has a boiling point of 40.5 ° C. at 1 bar.
  • the composition of the vapor is identical or essentially identical to the composition of the liquid, ie the composition of the mixture does not change, or does not change significantly, during evaporation.
  • the solvent mixture according to the invention has the further advantage that it contains no chlorine and thus does not cause any damage to the ozone layer. Besides, it is not flammable and can be used in the usual ultrasonic, immersion and brush washing systems.
  • a glass fiber-reinforced base material for printed circuit boards based on polyester was coated with a commercially available soldering flux (Zeva C20-200 from Zevatron, main component rosin, alongside activators) and dried in a drying cabinet at 60 ° C. for 18 hours. The material was then washed with a mixture of 1,4-dihydroperfluorobutane (96.5% by weight) and methanol (3.5% by weight) using ultrasound. The exposure time was 5 seconds, the flux was completely removed.
  • a commercially available soldering flux Zeva C20-200 from Zevatron, main component rosin, alongside activators
  • Example 2 The procedure was as in Example 1, except that another soldering flux was used (Zeva C 30-300 from Zevatron), which in turn contained rosin as the main constituent in addition to activators.
  • the flux was completely removed after an exposure time of 10 seconds.
  • the treatment times are between 60 and 90 seconds, depending on the flux.
  • ionic residues can be removed more easily with the azeotrope than with the conventional mixtures.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Detergent Compositions (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)

Claims (6)

  1. Procédé pour le nettoyage de composants électroniques, plus particulièrement de cartes de circuits imprimés ou de circuits imprimés brasés, caractérisé en ce qu'on lave les composants avec un mélange de type azéotrope qui contient d'environ 3 à 5 % en poids de méthanol et d'environ 95 à 97 % en poids de 1,4-dihydroperfluorobutane.
  2. Procédé selon la revendication 1, caractérisé en ce que le mélange de type azéotrope contient d'environ 3,2 à 4,0 % en poids de méthanol et d'environ 96,0 à 96,8 % en poids de 1,4-dihydroperfluorobutane.
  3. Procédé selon la revendication 1, caractérisé en ce que le mélange de type azéotrope contient d'environ 3,4 à 3,6 % en poids de méthanol et de 96,4 à 96,6 % en poids de 1,4-dihydroperfluorobutane.
  4. Procédé pour l'élimination de flux décapants, caractérisé par un lavage à l'aide d'un mélange de type azéotrope qui contient d'environ 3 à 5 % en poids de méthanol et d'environ 95 à 97 % en poids de 1,4-dihydroperfluorobutane.
  5. Procédé selon la revendication 4, caractérisé en ce que le mélange de type azéotrope contient d'environ 3,2 à 4,0 % en poids de méthanol et d'environ 96,0 à 96,8 % en poids de 1,4-dihydroperfluorobutane.
  6. Procédé selon la revendication 4, caractérisé en ce que le mélange de type azéotrope contient d'environ 3,4 à 3,6 % en poids de méthanol et de 96,4 à 96,6 % en poids de 1,4-dihydroperfluorobutane.
EP90125837A 1990-01-25 1990-12-31 Mélange de solvents pseudoazéotropes et procédé de nettoyage d'éléments électroniques à l'aide du dit mélange Expired - Lifetime EP0445438B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4002120A DE4002120A1 (de) 1990-01-25 1990-01-25 Neues azeotropartiges loesemittelgemisch und verfahren zur reinigung von elektronischen bauteilen mit hilfe desselben
DE4002120 1990-01-25

Publications (2)

Publication Number Publication Date
EP0445438A1 EP0445438A1 (fr) 1991-09-11
EP0445438B1 true EP0445438B1 (fr) 1996-06-05

Family

ID=6398744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125837A Expired - Lifetime EP0445438B1 (fr) 1990-01-25 1990-12-31 Mélange de solvents pseudoazéotropes et procédé de nettoyage d'éléments électroniques à l'aide du dit mélange

Country Status (6)

Country Link
US (1) US5073291A (fr)
EP (1) EP0445438B1 (fr)
JP (1) JP2812369B2 (fr)
DE (2) DE4002120A1 (fr)
DK (1) DK0445438T3 (fr)
ES (1) ES2088953T3 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531916A (en) * 1990-10-03 1996-07-02 E. I. Du Pont De Nemours And Company Hydrofluorocarbon cleaning compositions
FR2676066B1 (fr) * 1991-05-02 1993-07-23 Atochem Composition a base de 1,1-dichloro-1-fluoroethane, de 1,1,1,3,3-pentafluorobutane et de methanol, pour le nettoyage et/ou le sechage de surfaces solides.
FR2676067B1 (fr) * 1991-05-02 1993-07-23 Atochem Composition a base de 1,1,1,3,3-pentafluorobutane et de methanol, pour le nettoyage et/ou le sechage de surfaces solides.
DE59208347D1 (de) * 1991-06-21 1997-05-22 Solvay Azeotropartiges Gemisch aus Methanol und 1H-Perfluorhexan
EP0519432A3 (en) * 1991-06-21 1993-05-05 Hoechst Aktiengesellschaft Azeotrope-like mixture of 2-propanol and 1h-perfluorohexane
US5219488A (en) * 1992-03-16 1993-06-15 Allied-Signal Inc. Azeotrope-like compositions of 2-trifluoromethyl-1,1,1,2-tetrafluorobutane and ethanol or isopropanol
US5221493A (en) * 1991-10-18 1993-06-22 E. I. Du Pont De Nemours And Company Azeotropic compositions of 1,1,2,2,3,3,4,4-octafluorobutane and alcohols or ketones
EP0610507B1 (fr) * 1991-10-31 1998-07-01 Daikin Industries, Ltd. Composition de solvant nettoyant et procede de nettoyage
US6355113B1 (en) 1991-12-02 2002-03-12 3M Innovative Properties Company Multiple solvent cleaning system
US5194170A (en) * 1992-04-02 1993-03-16 E. I. Du Pont De Nemours And Company Binary azeotropic compositions of 1,1,2,2,3,3,4,4-octafluorobutane and either tran-1,2-dichloroethylene, cis 1,2-dichloroethylene, or 1-1 dichloroethane
US5250208A (en) * 1992-04-02 1993-10-05 E. I. Du Pont De Nemours And Company Ternary azeotropic compositions
US5219490A (en) * 1992-04-27 1993-06-15 Allied-Signal Inc. Azeotrope-like compositions of 1,1,2,3,3-pentafluoropropane
US5696307A (en) * 1994-01-21 1997-12-09 Alliedsignal Inc. Hydrofluoroalkanes as cleaning and degreasing solvents
FR2740469B1 (fr) * 1995-10-31 1997-12-05 Atochem Elf Sa Compositions de nettoyage a base de 1,1,1,2,2,4,4,- heptafluorobutane et d'alcools
US5730894A (en) * 1996-04-16 1998-03-24 E. I. Du Pont De Nemours And Company 1,1,2,2,3,3,4,4-octafluorobutane azeotropic (like) compositions
US5769935A (en) 1996-11-26 1998-06-23 Alliedsignal Inc. Use of fluorocarbons as a fusing agent for toners in laser printers

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL129954C (fr) * 1964-04-02
GB1399867A (en) * 1971-09-27 1975-07-02 Ici Ltd Cleaning process
GB1430582A (en) * 1972-01-14 1976-03-31 Haszeldine R N Preparation of fluorinated organic materials
US3960746A (en) * 1974-07-25 1976-06-01 E. I. Du Pont De Nemours And Company Azeotrope-like compositions of methanol, nitromethane and trichlorotrifluoroethane
US4157979A (en) * 1978-04-07 1979-06-12 Phillips Petroleum Company Azeotropic compositions
US4810412A (en) * 1988-04-11 1989-03-07 E. I. Du Pont De Nemours And Company Azeotropic compositions of 1,1-difluoro-2,2-dichloroethane and methanol or ethanol
JP2629056B2 (ja) * 1988-05-03 1997-07-09 アライド―シグナル・インコーポレーテッド １，１―ジクロロ―１―フルオロエタンおよびメタノールの共沸混合物様組成物
US4842764A (en) * 1988-05-03 1989-06-27 Allied-Signal Inc. Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane and methanol
US4816174A (en) * 1988-05-03 1989-03-28 Allied-Signal Inc. Azeotrope-like compositions of 1,1-dichloro-1-fluoroethane, methanol and nitromethane
JPH02221386A (ja) * 1989-02-23 1990-09-04 Asahi Glass Co Ltd 塩素化弗素化炭化水素系脱脂洗浄剤

Also Published As

Publication number Publication date
JPH04213397A (ja) 1992-08-04
ES2088953T3 (es) 1996-10-01
DK0445438T3 (da) 1996-11-04
DE59010360D1 (de) 1996-07-11
US5073291A (en) 1991-12-17
DE4002120A1 (de) 1991-08-01
EP0445438A1 (fr) 1991-09-11
JP2812369B2 (ja) 1998-10-22

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