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WO2000022081A1 - Composition d'heptafluorocyclopentane, procede de nettoyage et procede de de recuperation - Google Patents

Composition d'heptafluorocyclopentane, procede de nettoyage et procede de de recuperation Download PDF

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Publication number
WO2000022081A1
WO2000022081A1 PCT/JP1999/005577 JP9905577W WO0022081A1 WO 2000022081 A1 WO2000022081 A1 WO 2000022081A1 JP 9905577 W JP9905577 W JP 9905577W WO 0022081 A1 WO0022081 A1 WO 0022081A1
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WO
WIPO (PCT)
Prior art keywords
composition
cleaning
solvent
group
weight
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
PCT/JP1999/005577
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English (en)
Japanese (ja)
Inventor
Toshiro Yamada
Jun Saito
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.)
Zeon Corp
Original Assignee
Nippon Zeon Co Ltd
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
Priority claimed from JP10303245A external-priority patent/JP2000119203A/ja
Priority claimed from JP10289328A external-priority patent/JP2000119693A/ja
Application filed by Nippon Zeon Co Ltd filed Critical Nippon Zeon Co Ltd
Publication of WO2000022081A1 publication Critical patent/WO2000022081A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C11D7/5004—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
    • C11D7/22—Organic compounds
    • C11D7/24—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
    • C11D7/264—Aldehydes; Ketones; Acetals or ketals
    • 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

  • the present invention relates to a composition containing heptane fluorocyclopentane, a cleaning method using the composition, and a method for recovering the composition.
  • composition of the present invention is characterized in that the heptane fluorocyclopentane composition is useful as a solvent for cleaning various metals and plastics and as a solvent for various substances, and has excellent recoverability after use. . Background technology
  • an azeotropic composition comprising an organic solvent such as ethanol, ethanol, isopropanol, and cyclopentane, or an azeotropic composition having a composition ratio within a certain range is disclosed, and this composition is improved in soil removal performance, component cleaning performance, etc.
  • an organic solvent such as ethanol, ethanol, isopropanol, and cyclopentane
  • an azeotropic composition having a composition ratio within a certain range is disclosed, and this composition is improved in soil removal performance, component cleaning performance, etc.
  • a solvent As a solvent.
  • hydrofluorocarbon compositions are used industrially as detergents and solvents In order to reduce costs and reduce the impact on the environment, distill and recover after use and use repeatedly.However, in the above azeotropic composition or azeotropic composition, the composition ratio is constant before and after distillation and recovery. Despite the advantages, it was not possible to recover hydrofluorocarbons alone. In addition, the azeotropic composition described above has a problem in that since the mixed composition is specified as an azeotropic composition, the degree of freedom in use is small, and moreover, many of the azeotropic compositions become flammable. . Disclosure of the invention
  • an object of the present invention is to provide excellent washing performance, draining / drying performance, polymer solubility, etc., as well as excellent distillation recovery properties and the convenience of reuse.
  • An object of the present invention is to provide a new hydrofluorocarbon composition that contributes to reducing pollution.
  • HFCPA 1,1,2,2,3,3,4-hephfluorofluorocyclopentane
  • a heptane fluorocyclopenone composition which comprises one kind of solvent.
  • R represents a hydrogen or hydrocarbon group.
  • a cleaning method comprising contacting an object to be cleaned with the cyclopentane composition.
  • the composition containing contaminants is distilled by a simple distillation method.
  • a method for recovering a evening composition is provided.
  • 1,1,2,2,3,3,4-heptafluorocyclopentane (HFCPA) used in the present invention is a known substance having a boiling point of 82 ° C, and is nonflammable and in the presence of alkali or water. It is a type of hydrofluorocarbon that has excellent stability in water and does not destroy the ozone layer.
  • HF CPA can be produced by a known method. For example, in Journa lofof Chemic Society, p. 548, 1968, hydrogenation of octafluorocyclopentene yielded 1,1,2,2,3,3,4,5—year-old kutafluo. It is described that HFCPA is formed with rocyclopentane.
  • the purity of HFCP A used in the composition of the present invention is usually 95% by weight or more. It is preferably at least 97% by weight, more preferably at least 99% by weight.
  • Specific examples of the ketones (A) used in the composition of the present invention include methyl ethyl ketone, methyl propyl ketone, getyl ketone, methyl isopropyl ketone and the like. Preferred are methylethyl ketone and methyl isopropyl ketone.
  • aromatic hydrocarbons of the above (B) include benzene and toluene, but toluene is preferred.
  • the R in the formula (1) represents a hydrocarbon group
  • the R may be linear or branched, or may be cyclic. It is an alkyl, alkenyl or alkynyl group having 1 to 12 carbon atoms.
  • R is preferably hydrogen, a linear or branched alkyl group having 1 to 6 carbon atoms, or a cyclic alkyl group.
  • R examples include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a t-butyl group, an n-pentyl group, an isopentyl group, a cyclopentyl group, 2-methylbutyl group, 1-methylbutyl group, n-hexyl group, isohexyl group, cyclohexyl group, 3-methylpentyl group, 2-methylpentyl group, 1-methylpentyl group, n-heptyl group, isoheptyl Alkyl groups such as n-butyl group, n-octyl group, isooctyl group, 2-ethylhexyl group, nonyl group, decyl group; aryl group, 2-butenyl group, 3-butenyl group, isobutenyl group, 4-pen
  • cyclopentenonone compound (C) represented by the general formula (1) include cyclopentenonone, 2-methylcyclopentenonone, 2-ethylcyclobenzonone, and 2-n-pro Bilcyclopentene nonone, 2-n-butylcyclopentano
  • the solvents selected from the above (A), (B) and (C) can be used alone or in combination of two or more.
  • the HFC PA and the ketones (A), the aromatic hydrocarbons (B), and the cyclopentanone non-compound (Z) or (C) constituting the composition of the present invention may have any composition ratio.
  • Completely compatible with The composition ratio can be arbitrarily set according to the purpose of use of the composition, but usually, the solvent selected from the above (A), (B) and (C) is 1 to 50 to 99% by weight of HFCPA. A composition ratio of 5050% by weight is recommended.
  • (A) is 1 to 50 to 99% by weight of HFCPA. A composition ratio of 5050% by weight is recommended.
  • the mixing ratio of the solvent selected from (B) and (C) is less than 1% by weight, when the composition is used as a cleaning agent, the detergency of the flux is small, and the cleaning power of general oil is also low. It will be low. On the other hand, when the proportion exceeds 50% by weight, the detergency is the same as that obtained when cyclopentanone is used alone, and the characteristics of the mixed composition do not appear.
  • the composition ratio of (A), (B) and Z or (C) is 1 to 10% by weight to 90 to 99% by weight of HFC PA. And more preferably, (A) based on 93 to 99% by weight of HFCPA.
  • composition of the present invention may contain other solvents, if necessary, in addition to HFCPA and a solvent selected from the above (A), (B) and (C).
  • solvents that can be used together include alcohols such as methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, and amyl alcohol; ketones other than the above (A) such as acetone and cyclohexanone; Aromatic hydrocarbons other than the above (B); aliphatic hydrocarbons such as cyclopentane, cyclohexane, pentane, hexane, and heptane; ethers such as dimethyl ether and getyl ether; biel acetate, ethyl acetate, and acetic acid Esters such as butyl, etc .; 1,1,1,2,2,3,4,5,5,5-decafluoropentane, octafluorocyclopentane, perfluoro-1,3-dihydrocyclohexane, etc. Monobons; perfluorohexane, perfluoroheptane, perfluorocyclohexane, Per
  • the mixing ratio of the other solvent may be appropriately selected depending on the type of the solvent and the purpose of use of the composition, and is not particularly limited. Usually, HFCPA and (A), (B) and / or (C) are used. 40 parts by weight or less, preferably 2 parts by weight, based on 100 parts by weight of 0 parts by weight or less, more preferably 10 parts by weight or less.
  • composition of the present invention may contain additives such as stabilizers, antioxidants, and surfactants, depending on the purpose of use.
  • the stabilizer When the composition is used as a cleaning agent, the stabilizer has an effect of preventing deterioration due to heating during cleaning, mixing of dirt, and heating during distillation recovery.
  • Specific examples of the stabilizer include aliphatic nitro compounds such as nitromethane and nitroethane; acetylene alcohols such as 3-methyl-1-butyn-3-ol and 3-methyl-1-pentyn-3-ol; daricidol, methyldali Epoxides such as sidyl ether; ethers such as dimethoxymethane and 1,4-dioxane; unsaturated hydrocarbons such as hexene, heptene, cyclopentene and cyclohexene; aryl alcohol, 1-buten-3-ol, etc.
  • the amount of the stabilizer used is usually the total amount of the solvent components, that is, 100 parts by weight of the total amount of HFCPA, (A), (B) and Z or (C) and any other optional solvent. And 0.15 to 5 parts by weight.
  • phenols, amines, benzotriazoles and the like may be used in addition to the above stabilizers.
  • the amount used is 0.01 to 5 parts by weight based on the total amount of the solvent components.
  • Triadazoles such as benzotriazole, tolyltriazole, and benzotriazole derivatives having a hydrocarbon group having 2 to 10 carbon atoms; benzoimidazole; imidazole having a hydrocarbon group having 2 to 20 carbon atoms; Nitrogen-containing organic compounds such as imidazole compounds such as derivatives; thiazole compounds such as benzothiazole and thiazole derivatives having a hydrocarbon group having 2 to 20 carbon atoms; Also, ether compounds such as propylene oxide, 1,2-epoxybutane, 1,2-epoxyoctane, 1,6-hexanediol daricidyl ether and glycidyl ethers having 3 to 15 carbon atoms can be used. The addition amount of these protective agents is usually 0.01 to 1% by weight based on the total amount of the solvent components.
  • any of known anionic, cationic, and nonionic surfactants can be used, but nonionic surfactants are preferable.
  • the nonionic surfactant include polyoxyalkylene alkyl ether and polyoxyalkylene. Polyalkylene alkyl phenol ethers, polyoxyalkylene alkyl aliphatic esters, polyoxyalkylene aryl phenol ethers, polyoxyalkylene sorbin aliphatic esters, polyoxyalkylene alkylamines, polyoxyalkylenes, sorbitan aliphatic esters, etc. It can be suitably used.
  • the amount of the surfactant is usually 0.01 to 1% by weight based on the total amount of the solvent components.
  • composition of the present invention can be used as a detergent for degreasing various metals and plastics, and as a solvent for various substances.
  • the objects to be washed with the composition of the present invention include, for example, parts such as metals, ceramics, glass, plastics, and elastomers in the precision machine industry, metal processing industry, engineering machine industry, electronic industry, plastic industry, and the like.
  • Specific examples include automobile parts such as bumpers, gears, transmission parts, and radiator parts, electronic and electrical parts such as printed circuit boards, IC parts, lead frames, and motor parts, bearings, gears, and gears made of engineering plastics.
  • precision machine parts such as watch parts and camera parts, printing machines, printing rolls, rolled products, construction machinery, large machine parts such as large heavy machinery parts, and life products such as tableware.
  • the types of contaminants to be removed by washing include, for example, cutting oil, quenching oil, rolling oil, lubricating oil, machine oil, press working oil, punching oil, drawing oil, assembly oil, wire drawing oil, etc. , Greases, waxes, adhesives, fats and oils, mold release agents, hand marks, flux after soldering, resists, and solder pastes.
  • composition of the present invention when used as a solvent, specific examples thereof include a solvent for withstand voltage test of a switch, a solvent for various tests such as a solvent for a ceramic polarization test, a liquid medium for a rectifier, a liquid medium for a transformer, and semiconductor manufacturing.
  • Cooling and heating media such as cooling of liquid crystal projectors, cooling of dry etching equipment, cooling of liquid crystal projectors, and cooling of power supply heat exchangers, solvents for film formation with fluorosilicon polymers, and dry cleaning solvents.
  • an object to be cleaned may be brought into contact with the composition by any means.
  • Specific contact means include, for example, hand wiping, dipping, spraying
  • a method such as a shower can be used, and a dipping method is particularly preferably used.
  • physical means such as ultrasonic vibration, rocking, stirring, and brushing may be used in combination.
  • the temperature of the composition may be appropriately selected depending on the properties of the object to be cleaned, but is usually in the range from room temperature to the boiling point, preferably 30 ° C or more, the range up to the boiling point, more preferably 40 or more, It is in the range up to the boiling point.
  • the object to be cleaned can be washed by contacting it with the composition of the present invention, and then the object to be cleaned can be rinsed with a rinse agent and vapor-washed with a no or steam cleaner. That is, when cleaning is performed using the composition of the present invention, the composition may remain on the surface of the object to be cleaned after cleaning. By cleaning and / or steam cleaning, the residual composition can be removed to a state in which substantially no residual composition remains.
  • the rinse agent used for rinsing is not particularly limited.
  • the composition used as the agent in the present invention or a mixture thereof with another organic solvent can be used.
  • a rinsing detergent containing HFCPA as a main component is preferable.
  • the other organic solvent those that are generally used as a rinse solvent can be used.
  • linear saturated hydrocarbons such as hexane, octane and isooctane
  • cyclic saturated hydrocarbons such as cyclopentane and cyclohexane
  • aromatic hydrocarbons such as xylene
  • methyl alcohol, ethyl alcohol, propyl Lower alcohols such as alcohol and isopropyl alcohol
  • ketones such as acetone
  • ethers such as dimethyl ether and getyl ether
  • esters such as vinyl acetate
  • 1,1,1,2,2,3,4 , 5,5,5-Chain chain hydrofluorocarbons such as pentane
  • perfluorocarbons such as hexane and perfluorocarbon
  • the amount of the organic solvent used is generally 40% by weight or less, preferably 20% by weight or less, more preferably 20% by weight of the total amount of the rinse detergent. Is 10% by weight or less.
  • the object to be cleaned after the cleaning with the composition attached thereto may be brought into contact with a rinsing agent, and a normal rinsing method can be employed.
  • a rinsing agent for example, examples of the method include hand wiping, dipping, spraying, and showering, and the dipping method is particularly preferably used.
  • physical means such as ultrasonic vibration, rocking, stirring, and brushing may be used in combination.
  • the temperature of the rinse agent may be appropriately selected depending on the properties of the material to be washed, but is usually in the range of room temperature to the boiling point, preferably in the range of 30 ° C to the boiling point, more preferably in the range of 40 ° C to the boiling point. Range.
  • the steam cleaning may be performed according to a conventional method, and may be performed after rinsing cleaning after cleaning with the composition of the present invention, or may be performed without rinsing cleaning.
  • the cleaning agent used for the steam cleaning is not particularly limited, but a cleaning agent having the same composition as the rinsing cleaning mainly containing HFPCA is preferable.
  • HFCP A in the composition of the present invention exhibits extremely excellent compatibility with a solvent selected from the above (A;), (B) and (C) in all temperature ranges,
  • the composition remaining on the surface of the object to be cleaned after cleaning is very easily removed by rinsing with a rinsing agent containing HFCP A as a main component or steam with a steam cleaning agent.
  • the object to be cleaned can be dried after the rinsing and / or steam cleaning. Drying can be preferably performed by steam drying containing HFCPA as a main component. As a result, the cleaning agent composition on the surface of the object to be cleaned is replaced by a rinse agent or the like, and the vapor cleaning agent mainly composed of HF CPA is easily removed due to its low boiling point, and the object to be cleaned is easily dried. Is done.
  • HFCPA has a low boiling point
  • drying can be easily performed by omitting steam drying and hot air drying under normal pressure or heating drying under reduced pressure.
  • the mixture of the HFCPA used and recovered in each step and the solvent (A), (B) and / or (C) can be easily separated and recovered by distillation, and recycled. It can be used. That is, since HFCPA and the above-mentioned solvents (A), (B) and (C) do not azeotrope, only the main component HFCPA can be isolated and recovered by rectification.
  • the composition of the present invention is recovered by distillation, the simple distillation method can be used to recover the composition without largely changing the composition ratio before and after distillation in almost all distillation ranges. it can.
  • composition of the present invention When used as a solvent, it can be isolated and recovered in the same manner.
  • the simple distillation operation is not particularly limited, but it is generally recommended to distill the steam rising from the distillation can by condensing it under a condition where reflux is not applied. In this case, if there is a heat loss in the neck of the distillation can, etc., a part of the steam may be decomposed. Therefore, it is preferable to appropriately keep the flow path from the neck of the distillation can to the condenser. .
  • Distillation pressure is atmospheric pressure may be either reduced pressure, normal lmmHg ⁇ 1 0 k gZcm 2, preferably carried out at a 1 0mmHg ⁇ 3 k gZcm 2. Although a part of the charged liquid or most of the volatile components may be recovered by simple distillation, it is preferable to recover the entire amount in terms of efficiency and cost.
  • the flammable solvent (A), (B) and / or (C) is converted into the non-flammable HFP CA vapor phase in the rinse cleaning step. And it is preferable from the viewpoint of safety.
  • thermocouple thermometer was used to measure and record the temperature of the oil bath, the temperature in the still, and the top of the distillation column. The specific procedure is shown below.
  • HF CPA 1,1,2,2,3,3,4-heptafluorocyclobenzene
  • organic solvent see Table 1
  • the oil bath was heated to 100-120 ° C. 30 minutes to 1 hour after the top If the temperature did not rise, the oil bath temperature was increased gradually to 130 ° C and 140 ° C. For about 1 hour after the temperature at the top of the tower rose and reached a certain temperature, the whole was refluxed without extracting the distillate. After that, the distillate was withdrawn at a reflux ratio of 2 seconds and refluxed for 40 seconds, and the distillate was withdrawn into the receiver in three 5cc cycles (fractions 1 to 3). The composition ratio of each fraction was determined by gas chromatography analysis.
  • Table 1 shows the azeotropic test results of HF CPA and various organic solvents. The presence or absence of the azeotropic property was judged from the distillation temperature curve of the thermograph and the composition ratio of the extracted fraction.
  • the azeotropic temperature in Table 1 is the temperature at the top of the column when fraction 3 was extracted.
  • the azeotropic composition ratio is the composition ratio of fraction 3.
  • Example 2 Using the same rectifying apparatus as in Example 1, 50.0 g of HFCPA and 50.0 g of toluene were charged into a distillation still. Under normal pressure, oil bath temperature of 120 ° C, distillation tank temperature of 102 to 108 ° C, and top temperature of 80 to 81 ° C, distillate withdrawal 2 seconds Z reflux 40% of reflux I took it out. The rectification was stopped when the temperature at the top of the column started to decrease.
  • composition ratio of MEK before distillation was 5%, whereas the composition ratio of MEK in distillation fractions 1 to 5 was 3.8 to 8.2%. Thus, no significant change in the composition ratio was observed before and after the distillation.
  • Example 4 Simple distillation was performed in the same manner as in Example 4 except that MEK in Example 4 was replaced with methyl isopropyl ketone (MI PK) and the number of distillation fractions was 13.
  • MI PK methyl isopropyl ketone
  • the composition ratio of MI PK in distillation fractions 1 to 12 was 2.0 to 8.4%, while the composition ratio of MI PK before distillation was 5%. Thus, no significant change in the composition ratio was observed before and after the distillation.
  • the composition ratio of MI II in the final fraction 13 was 12.7%.
  • the amount of distillate was as low as 6.1%.
  • Example 4 was carried out in the same manner as in Example 4 except that ⁇ in Example 4 was changed to toluene (TOL) and the number of distilling fractions was changed to 6. Table 3 shows the experimental data.
  • composition ratio of TOL before distillation was 5%
  • composition ratio of TOL in distillation fractions 1 to 6 was 4.0 to 6.8%.
  • no significant change in the composition ratio was observed before and after the distillation.
  • Example 4 Simple distillation was performed in the same manner as in Example 4, except that MEK in Example 4 was replaced with isopropanol (IPA) and the number of distilling fractions was changed to 6. Table 4 shows the results.
  • the composition ratio of IPA before distillation was 5%, whereas the composition ratio of IPA in distillation fractions 1 to 6 was 0.3 to 10.9%. Thus, the composition ratio fluctuated greatly before and after distillation.
  • composition ratio of isooctane before distillation was 5%, while the composition ratio of isooctane in distillation fractions 1 to 6 was 0.4 to 10.9%.
  • Isooctane in the final fraction 7 was 0.1% (distillation amount: 9.5 g).
  • the composition ratio fluctuated greatly before and after distillation.
  • Detergency was evaluated by the following three grade tests by visually observing the effect of removing rosin-based flux and the effect on printed circuit boards.
  • Table 5 shows the results.
  • the symbols for substrate and flux are as follows.
  • Substrate A Phenol XPC resin
  • NZ-KB value the Kaon rib value of the Zeon method
  • the NZ-KB value which is one index of the detergency of the flux, can be controlled by the mixing ratio of cyclobennone and HFCP.
  • the object to be cleaned was immersed in a container containing a composition of 80Z20 (weight ratio) of HFCP A cyclopenone, 200 ml, and ultrasonically cleaned for 1 minute. After that, it was pulled up, the object to be cleaned was left standing in the vapor phase of HFCPA for 1 minute, rinsed, then pulled up in the air and dried for 1 minute.
  • a cleaning test was performed in the same manner as in Example 12, except that a composition of HFCP A 2 _n-pentylcyclopentene nonone was used as a cleaning agent at a weight ratio of 70/30.
  • the object to be cleaned was immersed in a container containing 20 Om1 of a composition of HFCPA "cyclopeninone 60 to 40 (weight ratio)" and subjected to ultrasonic treatment at room temperature for 1 minute. It was lifted, left in the vapor phase of HFCPA for 1 minute for rinsing, pulled up into the air, and dried.
  • the surface of the solder to be cleaned after drying was in an extremely good condition without turbidity, and there was no change in the substrate itself. Further, it was confirmed by gas chromatographic analysis that no detergent composition remained.
  • the object to be cleaned was subjected to ultrasonic treatment with 150 ml of a 75% aqueous solution of isopropyl alcohol, and the conductivity of the treated solution was measured with a conductivity meter.
  • the conductivity was 0.3 S / cm or less, confirming that the ionic components remaining on the substrate were sufficiently cleaned and removed.
  • composition of the present invention is useful as a detergent for degreasing and washing various metals and plastics, and as a solvent for various substances.
  • the composition of the present invention When used as a cleaning agent, the composition of the present invention exhibits good cleaning performance, especially high degreasing performance against oils and fats such as machine oil, grease and wax, and fluxes. In addition, it has low toxicity, and has the feature that substantially no cleaning agent remains on the surface to be cleaned after cleaning. Further, since the solvent component in the composition does not azeotrope, the rectification facilitates the isolation and recovery of the main component HFCPA. Further, if simple distillation is performed, the composition ratio does not largely fluctuate before and after distillation, so that the composition of the present invention can be advantageously recovered and reused after being used as a detergent or a solvent. Therefore, its usefulness is high from the viewpoint of reducing environmental pollution.

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  • Engineering & Computer Science (AREA)
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Abstract

L'invention concerne une composition comprenant du 1,1,2,2,3,3,4-heptafluorocyclopentane et un solvant provenant des catégories (A), (B) et (C) suivantes: (A) cétones linéaires C4-5, (B) hydrocarbures aromatiques C6-7,et (C) composés de cyclopentane de formule (1). Dans ladite formule, R est hydrogène ou un groupe hydrocarbure. L'heptafluorocyclopentane et le solvant provenant des catégories (A), (B) et (C) sont généralement utilisés respectivement dans les proportions suivantes, en poids: de 50 à 99 %, et de 1 à 50 %, les deux se complétant ainsi pour la somme totale. La composition considérée est utile comme détergent ou comme solvant.
PCT/JP1999/005577 1998-10-09 1999-10-08 Composition d'heptafluorocyclopentane, procede de nettoyage et procede de de recuperation Ceased WO2000022081A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP10303245A JP2000119203A (ja) 1998-10-09 1998-10-09 ヘプタフルオロシクロペンタン組成物およびその回収方法
JP10/303245 1998-10-09
JP10/289328 1998-10-12
JP10289328A JP2000119693A (ja) 1998-10-12 1998-10-12 洗浄剤および該洗浄剤を用いた洗浄法

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WO2000022081A1 true WO2000022081A1 (fr) 2000-04-20

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0425598A (ja) * 1990-05-21 1992-01-29 Agency Of Ind Science & Technol 洗浄用溶剤
WO1995005448A1 (fr) * 1993-08-16 1995-02-23 Daikin Industries, Ltd. Composition de solvant de nettoyage et procede pour nettoyer ou secher un article
JPH1071373A (ja) * 1996-08-30 1998-03-17 Nippon Zeon Co Ltd 洗浄方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
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JPH0425598A (ja) * 1990-05-21 1992-01-29 Agency Of Ind Science & Technol 洗浄用溶剤
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