EP0621907A1 - Procede utilise pour le nettoyage d'objets - Google Patents

Procede utilise pour le nettoyage d'objets

Info

Publication number
EP0621907A1
EP0621907A1 EP93902139A EP93902139A EP0621907A1 EP 0621907 A1 EP0621907 A1 EP 0621907A1 EP 93902139 A EP93902139 A EP 93902139A EP 93902139 A EP93902139 A EP 93902139A EP 0621907 A1 EP0621907 A1 EP 0621907A1
Authority
EP
European Patent Office
Prior art keywords
alcohols
volume
mixture
article
hydrocarbon
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.)
Ceased
Application number
EP93902139A
Other languages
German (de)
English (en)
Inventor
Thomas Wee Sun Lee
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.)
ExxonMobil Chemical Patents Inc
Original Assignee
Exxon Chemical Patents Inc
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 Exxon Chemical Patents Inc filed Critical Exxon Chemical Patents Inc
Priority to EP93902139A priority Critical patent/EP0621907A1/fr
Publication of EP0621907A1 publication Critical patent/EP0621907A1/fr
Ceased legal-status Critical Current

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
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/261—Alcohols; Phenols
    • C11D7/262—Alcohols; Phenols fatty or with at least 8 carbon atoms in the alkyl or alkenyl chain
    • 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
    • C23G5/024—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing 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
    • C11D7/261—Alcohols; Phenols
    • 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
    • C11D7/5022—Organic solvents containing oxygen
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/26—Cleaning or polishing of the conductive pattern
    • 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
    • C11D7/24—Hydrocarbons
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/07—Treatments involving liquids, e.g. plating, rinsing
    • H05K2203/0779—Treatments involving liquids, e.g. plating, rinsing characterised by the specific liquids involved
    • H05K2203/0783—Using solvent, e.g. for cleaning; Regulating solvent content of pastes or coatings for adjusting the viscosity

Definitions

  • the present invention relates to a method of
  • PCBs PCBs
  • soldering flux it is usual for soldering flux to be applied to the boards to promote strong bonding of the solder to the board.
  • the flux and solder may be applied, for example, by the wave soldering method or the reflow soldering method. After soldering, flux remains on the boards.
  • Rosin-containing fluxes include rosin mildly activated (RMA) and rosin activated (RA) fluxes, which are obtained by activation of a rosincontaining flux using, for example, organic acids, amines, amides or halogen-containing compounds.
  • RMA rosin mildly activated
  • RA rosin activated
  • Many of the activating materials decompose on soldering thus giving rise to inorganic substances that can damage the electronic components.
  • the residue to be removed thus comprises a combination of rosin molecules and inorganic substances.
  • European Patent Specification No. 416,763 discloses compositions for cleaning dirty articles, for example, PCBs, comprising terpene hydrocarbons or other non- halogenated solvents. After the cleaning step, remaining traces of solvent are said to be removed azeotropically, by forming an azeotrope between the solvent and an aqueous medium, the azeotropic mixture being evaporated from the surface of the article.
  • a low boiling organic solvent for example a ketone, amine, ether or alcohol may be included in the cleaning
  • the low boiling organic solvent if present, is preferred to be a C3 to C4 alcohol.
  • Japanese Patent Specification No. 3-6300 discloses the use of an oleophilic detergent comprising a terpene hydrocarbon selected from 10C monoterpenes to 15C sesquiterpenes, with turpentine oil and a surfactant.
  • the composition may further contain an alcohol (the only example given being a C3 alcohol), ether, ketone, ester, aromatic compound or water.
  • US Patent Specification No. 4,983,224 discloses a cleaning composition comprising a terpene or terpenol, a surfactant and an aprotic solvent, for example, DMF or DMSO.
  • European Patent Specification No. 120,319 discloses a cleaning composition for removing wax from electronic components, the composition containing halogenated or non-halogenated hydrocarbon, a fluorinated alcohol having at least two fluorine atoms and, optionally, a further, polar, organic solvent.
  • the hydrocarbon may be, inter alia, petroleum ether.
  • the further polar organic solvent may be, for example, an alcohol.
  • alcohols there are proposed aliphatic, cyclic and aromatic alcohols that in each case have seven or fewer carbon atoms.
  • British Patent Specification No. 2,175,004 discloses a cleaning composition for removing dirt and grease from metal and plastic surfaces, the composition containing from 85 to 97 parts by weight of a non-aromatic
  • hydrocarbon including aliphatic and/or cyclo-aliphatic compounds, from 3 to 15 parts by weight of alkylated aromatic substances containing at least one C8 to C18 alkyl group and, in a preferred form, from 0.1 to 1 part by weight of an additive which renders the composition more incompatible with water, so facilitating separation from water after the cleaning step.
  • the additive may be selected from aliphatic alcohols having from 8 to 20 carbon atoms, ether derivatives of alkylene glycols and hydroxycarboxylic acids having more than 8 carbon atoms.
  • British Patent Specification No. 1,524,448 discloses a cold cleaner for removing oily and fatty contaminations from surfaces.
  • the composition may contain a mineral oil fraction, which is preferred to be a mostly paraffinic or naphthenic fraction, and saturated or unsaturated
  • aliphatic alcohols or alicyclic alcohols with from 6 to 20 carbon atoms and/or fatty acids, and a sulphosuccinic acid diester As alcohols, unsaturated alcohols are said to be preferred.
  • a terpene containing a terpene, optionally in combination with a surfactant that is capable of emulsifying the terpene.
  • European Patent Specification No. 412,475 discloses a cleaning composition for cleaning PCBs, the
  • composition containing, a dibasic ester and a hydrocarbon solvent other than a terpene.
  • hydrocarbon solvents are proposed petroleum derived solvents, for example, mineral spirits, naphthas and aromatics.
  • the composition may contain a further component, for example a non-ionic surfactant, for improving the miscibility of the dibasic ester and hydrocarbon solvent.
  • European Patent Specification No. 104,633 discloses a method of cleaning PCBs in which the boards are
  • the azeotropic liquid may contain a low molecular weight alcohol, for example, a C3 or C4 alcohol, together with a hydrocarbon of relatively low molecular weight, for example,
  • European Patent Specification No. 302,313 discloses a method of cleaning objects in which the objects are treated in a closed container with an azeotropic mixture of water and a further solvent, for example, methylene chloride, trichloroethylene or tetrachloroethane.
  • the present invention provides a process for
  • hydrocarbons selected from C8 to C15 paraffinic and naphthenic hydrocarbons and having an aromatics content of not more than 8% by weight, based on the combined aromatics and hydrocarbon content of the fluid,
  • an alcohol-containing fluid comprising one or more alcohols selected from C5 to C15 straight-chain or branched-chain, saturated aliphatic alcohols, the fluids being substantially free of any halogencontaining organic compound and component (ii)
  • the fluid or fluids contain not more than 5 ppm of halogen.
  • the article may be contacted sequentially with a hydrocarbon-containing fluid and an alcohol-containing fluid.
  • a hydrocarbon-containing fluid and an alcohol-containing fluid Preferably, however, the article is contacted with a liquid mixture of the said fluids the said mixture comprising from 75 to 95 parts by volume of one or more hydrocarbons selected from C8 to C15 paraffinic and naphthenic hydrocarbons, and from 5 to 25 parts,
  • the aromatics content of the liquid mixture will be not more than 8% by weight based on the combined aromatics and hydrocarbon content of the
  • the hydrocarbon-containing fluid is a distillation fraction obtained in the distillation of petroleum.
  • the hydrocarbon-containyig fluid preferably contains from 0.5 to 2 parts by volume of normal and isoparaffins per part by volume of naphthenes.
  • the amount of aromatics, if present, does not exceed 2%, and more preferably does not exceed 1%, by weight, based on the total weight of hydrocarbons and aromatics.
  • the hydrocarbon-containing fluid may contain approximately 55 parts by volume of normal and isoparaffins, and approximately 45 parts by volume of naphthenes, with less than 1% by weight, based on the total weight of the fluid, of aromatics.
  • the distillation boiling range of the hydrocarboncontaining fluid is preferably within the range of from 150°C to 260°C at atmospheric pressure.
  • the alcohol-containing fluid which may be any suitable alcohol-containing fluid.
  • alcohols selected from C6 to C8 alcohols preferably comprises a mixture of aliphatic primary alcohols which may be linear or branched.
  • the distillation boiling range of the alcohol-containing fluid is preferably within the range of from 150°C to 310°C at atmospheric pressure.
  • the article may be any material.
  • the article may be any material.
  • the article may be contacted sequentially with the hydrocarbon-containing fluid and the alcohol- containing fluid, the article may be contacted first with either of the fluids.
  • the fluids or mixture with which the article is contacted may be at a temperature of from ambient temperature to 90°C, more preferably at a
  • the cleaned article may then be dried in air, preferably in hot air.
  • the article may be contacted with a detergent solution and rinsed with water to remove the detergent solution before drying.
  • the detergent solution may comprise an alkylbenzene sulphonate and an alkylphenol alkoxylate, for example, an alkylphenol ethoxylate.
  • the alkyl groups of the alkylbenzene sulphonate and the alkyl phenol alkoxylate may in each case advantageously be an aliphatic, cyclic or alicyclic alkyl group having from 8 to 14 carbon atoms.
  • the detergent solution may, for example, be a mixture of a dodecylbenzene sulphonate and a dodecylphenol ethoxylate.
  • the article is preferably an electronic component, more especially a PCB.
  • the method of the invention may be used with particular advantage in the cleaning of articles that have been soldered with the use of a rosin-containing flux, the method may also be used in the cleaning of articles that have been soldered with the assistance of synthetic water-soluble fluxes.
  • composition for cleaning articles comprising:
  • fraction obtained by distillation of petroleum the said fraction containing not less than 92%, preferably not less than 99%, by weight, based on the total weight of the fraction, of hydrocarbons selected from C8 to C15 paraffinic and naphthenic hydrocarbons; and
  • composition being substantially free of any halogen- containing organic compound.
  • the process of the invention is particularly concerned with
  • hydrocarbons and/or mixtures of alcohols also promotes dissolution of the rosin molecules.
  • the solvents and solvent mixture used in accordance with the invention enable the use of halogen-substituted organic compounds, which are known to have ozone
  • the mixture has low toxicity and a high flash point so that it is relatively safe to use and complicated handling procedures are unnecessary. Moreover, it is non-corrosive to materials generally used in the manufacture of PCBs.
  • the board or comb was wave soldered at 250°C using 63/37 (tin/lead) alloy, at a conveyor speed of 1.5 meter per min.
  • the upper side of the board or comb was
  • the cream used was of AAS powder at 86% metal, with a 62% tin content.
  • the cream was applied to the board or comb by manual screen printing and reflowed by heating in a BTU infrared oven. In each case either an RMA cream flux or a "no clean" synthetic water-soluble cream flux was used.
  • the board or comb was hand soldered with 60/40
  • IBP and FBP represent the respective temperatures at which boiling commences and finishes.
  • PMCC Pensky- Martens closed cup.
  • soldered board or comb was individually cleaned in 500 ml of the cleaning composition under ultrasonic agitation at 45°C.
  • the soldered board or comb was then rinsed by immersion in a detergent solution containing 10% by volume of a mixture of dodecylbenzene sulphonate and dodecylphenol ethoxylate in deionised water.
  • the board or comb was then rinsed in deionised water and dried in hot air.
  • the surface insulation resistance (SIR) of the boards and combs was also determined.
  • SIR surface insulation resistance
  • the initial insulation resistance of each board or comb was measured using a voltage of 500 V DC for 1 minute prior to placing each board or comb in a humidity chamber at 40°C, 90% relative humidity (RH) for 96 hours.
  • the SIR was then measured again under the humid conditions (90% relative humidity at 40°C) using 500 V DC.
  • the results of the SIR test are given in Table II.
  • a cleaning mixture containing 5 parts by volume of isomeric C6 and C7 alcohols and 95 parts by volume of C10 to C13 paraffins and naphthenes was prepared.
  • IPA isopropyl alcohol
  • the rosin content of the IPA was determined by spectrophotometry at wavelength 242 nm.
  • a halogenated cleaning fluid containing 93 parts by volume of CFC-113 and 7 parts by volume of methanol was prepared and six PCBs coated with activated fluxes were cleansed individually by the condensing vapour (b.p. 48°C) of the halogenated fluid for five minutes in a closed container. Upon cleansing, the specimens were treated as in the case of the

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Emergency Medicine (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Detergent Compositions (AREA)

Abstract

Selon un procédé de nettoyage d'objets, utilisé en particulier pour enlever du fondant après un sondage, un objet est mis en contact avec un fluide contenant un ou plusieurs hydrocarbures choisis entre des hydrocarbures naphthéniques et paraffiniques C8 à C15, et avec un fluide contenant un ou plusieurs alcools choisis entre des alcools aliphatiques saturés, ramifiés ou non ramifiés, C5 à C15. Le fluide contenant de l'hydrogène et le fluide contenant de l'alcool se présentent de préférence sous la forme d'un mélange liquide. Un nettoyage efficace d'objets, par exemple des composants électroniques après le soudage, est ainsi rendu possible sans qu'il soit nécessaire d'utiliser des solvants contenant de l'halogène.
EP93902139A 1992-01-03 1992-12-31 Procede utilise pour le nettoyage d'objets Ceased EP0621907A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93902139A EP0621907A1 (fr) 1992-01-03 1992-12-31 Procede utilise pour le nettoyage d'objets

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP92300061 1992-01-03
EP92300061 1992-01-03
EP93902139A EP0621907A1 (fr) 1992-01-03 1992-12-31 Procede utilise pour le nettoyage d'objets
PCT/EP1992/003017 WO1993013246A1 (fr) 1992-01-03 1992-12-31 Procede et composition utilises pour le nettoyage d'objets

Publications (1)

Publication Number Publication Date
EP0621907A1 true EP0621907A1 (fr) 1994-11-02

Family

ID=8211218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93902139A Ceased EP0621907A1 (fr) 1992-01-03 1992-12-31 Procede utilise pour le nettoyage d'objets

Country Status (6)

Country Link
EP (1) EP0621907A1 (fr)
JP (1) JPH07503032A (fr)
KR (1) KR940703940A (fr)
CA (1) CA2126969A1 (fr)
MY (1) MY134746A (fr)
WO (1) WO1993013246A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69528151T2 (de) * 1994-07-07 2003-01-30 Safety Kleen Uk Ltd Verbesserte lösungsmittelzusammunsetzung
US6004434A (en) * 1994-07-07 1999-12-21 Safety-Kleen Corp. Method of recycling cleaning solvent
GB2298430A (en) * 1995-02-22 1996-09-04 Exxon Chemical Patents Inc Cleaning composition and method
GB2298433A (en) * 1995-02-22 1996-09-04 Exxon Chemical Patents Inc Cleaning composition
FR2733248B1 (fr) * 1995-04-20 1997-06-13 Atochem Elf Sa Composition de nettoyage a froid a base d'alcanes ou de cycloalcanes et d'un compose organique comprenant une fonction oxygenee
FR2733247B1 (fr) * 1995-04-20 1997-06-13 Atochem Elf Sa Agent de nettoyage a base de cycloalcanes
WO1997003136A1 (fr) * 1995-07-11 1997-01-30 Shell Internationale Research Maatschappij B.V. Composition de nettoyage
FR2847905A1 (fr) * 2002-12-03 2004-06-04 Serma Technologies Composition chimique, son application et son utilisation
FR2943070B1 (fr) * 2009-03-12 2012-12-21 Total Raffinage Marketing Fluide hydrocarbone hydrodeparaffine utilise dans la fabrication de fluides industriels, agricoles ou a usage domestique
CN105802758B (zh) * 2016-05-17 2019-04-05 江苏筑磊电子科技有限公司 火灾后电子线路板清洗剂

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2525996C2 (de) * 1975-06-11 1983-11-24 Henkel KGaA, 4000 Düsseldorf Kaltreiniger
DE3812454A1 (de) * 1988-04-14 1989-10-26 Shell Int Research Entfettungsfluessigkeit
GB8918504D0 (en) * 1989-08-14 1989-09-20 Bush Boake Allen Ltd Methods and compositions for cleaning articles
DE3935032C3 (de) * 1989-10-20 2000-08-24 Zinser Raimund Verfahren und Vorrichtung zum Reinigen und Trocknen von Gegenständen
JPH03146597A (ja) * 1989-11-01 1991-06-21 Henkel Hakusui Kk プリント基板の洗浄用組成物
EP0426942A1 (fr) * 1989-11-08 1991-05-15 Arakawa Chemical Industries, Ltd. Moyen pour de nettoyage de flux de brasage à base de colophane
AU8103091A (en) * 1990-06-11 1992-01-07 Martin Marietta Corporation Cycloparaffins containing cleaning composition and method of using them

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9313246A1 *

Also Published As

Publication number Publication date
JPH07503032A (ja) 1995-03-30
MY134746A (en) 2007-12-31
KR940703940A (ko) 1994-12-12
CA2126969A1 (fr) 1993-07-08
WO1993013246A1 (fr) 1993-07-08

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