EP0761843A2 - Use of (C1-C5) alkyl esters of aliphatic (C8-C22) monocarboxylic acid for cleaning metal objects - Google Patents
Use of (C1-C5) alkyl esters of aliphatic (C8-C22) monocarboxylic acid for cleaning metal objects Download PDFInfo
- Publication number
- EP0761843A2 EP0761843A2 EP96112644A EP96112644A EP0761843A2 EP 0761843 A2 EP0761843 A2 EP 0761843A2 EP 96112644 A EP96112644 A EP 96112644A EP 96112644 A EP96112644 A EP 96112644A EP 0761843 A2 EP0761843 A2 EP 0761843A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- esters
- aliphatic
- cleaning
- monocarboxylic acids
- use according
- 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.)
- Withdrawn
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- 238000004140 cleaning Methods 0.000 title claims abstract description 26
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 title claims abstract 3
- 125000001931 aliphatic group Chemical group 0.000 title claims description 22
- 125000006724 (C1-C5) alkyl ester group Chemical group 0.000 title claims description 8
- 239000002184 metal Substances 0.000 title abstract description 6
- 239000012459 cleaning agent Substances 0.000 claims abstract description 30
- 150000002148 esters Chemical class 0.000 claims description 52
- 239000000203 mixture Substances 0.000 claims description 35
- 150000002763 monocarboxylic acids Chemical class 0.000 claims description 27
- 239000003960 organic solvent Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003995 emulsifying agent Substances 0.000 claims description 8
- 239000000839 emulsion Substances 0.000 claims description 8
- 239000003981 vehicle Substances 0.000 claims description 8
- 229920006395 saturated elastomer Polymers 0.000 claims description 7
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- 239000003112 inhibitor Substances 0.000 claims description 6
- 150000004702 methyl esters Chemical class 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims description 2
- 125000004185 ester group Chemical group 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 8
- 125000005907 alkyl ester group Chemical group 0.000 abstract description 2
- -1 alkane carboxylic acids Chemical class 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 239000004359 castor oil Substances 0.000 description 2
- 235000019438 castor oil Nutrition 0.000 description 2
- 235000019197 fats Nutrition 0.000 description 2
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 235000015096 spirit Nutrition 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- 240000002791 Brassica napus Species 0.000 description 1
- 235000004977 Brassica sinapistrum Nutrition 0.000 description 1
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 description 1
- 244000060011 Cocos nucifera Species 0.000 description 1
- 235000013162 Cocos nucifera Nutrition 0.000 description 1
- 240000003133 Elaeis guineensis Species 0.000 description 1
- 235000001950 Elaeis guineensis Nutrition 0.000 description 1
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 description 1
- 244000020551 Helianthus annuus Species 0.000 description 1
- 235000003222 Helianthus annuus Nutrition 0.000 description 1
- OYHQOLUKZRVURQ-HZJYTTRNSA-N Linoleic acid Chemical compound CCCCC\C=C/C\C=C/CCCCCCCC(O)=O OYHQOLUKZRVURQ-HZJYTTRNSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 240000000528 Ricinus communis Species 0.000 description 1
- 235000004443 Ricinus communis Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 238000006136 alcoholysis reaction Methods 0.000 description 1
- DTOSIQBPPRVQHS-PDBXOOCHSA-N alpha-linolenic acid Chemical compound CC\C=C/C\C=C/C\C=C/CCCCCCCC(O)=O DTOSIQBPPRVQHS-PDBXOOCHSA-N 0.000 description 1
- 235000020661 alpha-linolenic acid Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 125000005456 glyceride group Chemical group 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- 235000020778 linoleic acid Nutrition 0.000 description 1
- OYHQOLUKZRVURQ-IXWMQOLASA-N linoleic acid Natural products CCCCC\C=C/C\C=C\CCCCCCCC(O)=O OYHQOLUKZRVURQ-IXWMQOLASA-N 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 239000003346 palm kernel oil Substances 0.000 description 1
- 229920000151 polyglycol Polymers 0.000 description 1
- 239000010695 polyglycol Substances 0.000 description 1
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 description 1
- 229960003656 ricinoleic acid Drugs 0.000 description 1
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
Classifications
-
- 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
- C23G5/032—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using organic solvents containing oxygen-containing compounds
-
- 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/20—Organic compounds containing oxygen
- C11D3/2093—Esters; 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
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/43—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
- C11D7/26—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
- C11D7/50—Solvents
- C11D7/5004—Organic solvents
- C11D7/5022—Organic solvents containing oxygen
-
- 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
- C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
- C11D2111/10—Objects to be cleaned
- C11D2111/14—Hard surfaces
- C11D2111/16—Metals
Definitions
- the invention relates to the use of (C 1 -C 5 ) alkyl esters of aliphatic (C 8 -C 22 ) monocarboxylic acids.
- the invention further relates to an agent and a method for cleaning metallic objects.
- EP-B1-435 943 discloses the use of (C 1 -C 5 ) alkyl esters of aliphatic (C 8 -C 22 ) monocarboxylic acids for removing printing ink from printing presses.
- the application rollers or printing blankets made of rubber are treated with an agent which contains these alkyl esters.
- Liquid metal cleaning agents usually contain large amounts of organic solvents, which are mostly selected from the groups of unsubstituted and substituted hydrocarbons, as well as so-called white spirit or VOC chemicals (volatile organic chemicals). In the course of the ongoing environmental discussion and tightening legal regulations, such solvents are to be largely replaced by less hazardous chemicals.
- the object of the invention is therefore to largely exclude or completely avoid the disadvantages described in the known metal cleaning agents. As a result, the usual cleaning processes for metallic objects are also to be improved.
- the (C 1 -C 5 ) alkyl esters of aliphatic (C 8 -C 22 ) monocarboxylic acids or their mixtures are used for cleaning metallic objects or for producing a cleaning agent for metallic objects.
- a so-called metal cleaner or - in common parlance - "industrial cleaner” can be produced, in which a product obtainable from so-called renewable raw materials can be used.
- the esters used are non-toxic and biodegradable. They also have a high flash point. From these few details, the decisive advantages over conventional cleaning agents, which contain a large amount of the organic solvents mentioned, result.
- esters mentioned or their mixtures can in principle be used to clean all metallic objects. Under certain circumstances, these metallic objects can also be at least partially coated with other materials, for example, be painted.
- a preferred area of application of the invention is in particular the cleaning of motor vehicle parts and possibly motor vehicles themselves, the esters being used in particular as engine cleaners or wheel rim cleaners.
- esters that fall under the above definitions can in principle be used. They are essentially the (C 1 - C 5 ) alkyl esters of alkane carboxylic acids and their unsaturated representatives with 8 - 22 C atoms. These esters of the so-called middle and higher fatty acids (up to C 22 ) can be handled for the use according to the invention, the esters liquid at room temperature being preferred.
- the esters can be prepared in a known manner by esterification of the corresponding monocarboxylic acid or a mixture of such acids with the corresponding alcohol.
- the esters can also be obtained in the usual way by transesterification (alcoholysis) of the glyceride (fat / oil) concerned with the corresponding (C 1 -C 5 ) alcohol.
- Important representatives of the esters or mixtures of such esters which can be used according to the invention are already being produced and sold on a large scale.
- rapeseed, sunflower, coconut, oil palm kernel and castor oil are particularly suitable as raw materials for the esters which can be used according to the invention.
- (C 1 -C 3 ) alkyl esters of (C 8 -C 22 ) monocarboxylic acids or mixtures thereof are used.
- the methyl esters of these monocarboxylic acids can be used.
- esters of aliphatic (C 10 -C 22 ) monocarboxylic acids are preferred, the esters of aliphatic (C 16 -C 20 ) monocarboxylic acids in particular being usable in accordance with the invention.
- both the esters of aliphatic, saturated monocarboxylic acids and the esters of aliphatic, unsaturated monocarboxylic acids can be used in the invention.
- the esters of aliphatic, saturated monocarboxylic acids (and their mixtures) are preferred on account of the good availability and the mostly sufficient cleaning action.
- the use of esters of aliphatic, unsaturated monocarboxylic acids or, preferably, of mixtures of esters of aliphatic, saturated monocarboxylic acids with esters of aliphatic, unsaturated monocarboxylic acids is recommended when an increased cleaning action is desired, which can be associated with the proportion of esters of aliphatic, unsaturated monocarboxylic acids .
- esters of aliphatic, unsaturated monocarboxylic acids are used, monounsaturated to triunsaturated monocarboxylic acids are preferably provided. This can be, for example, oleic acid, erucic acid, linoleic acid or linolenic acid. As already mentioned, esters of ricinoleic acid can also preferably be used.
- the esters mentioned can be used not only as such, ie undiluted (if appropriate with suitable additives), but also in a mixture with at least one organic solvent. It can be done in such a way that the previously known metal cleaning agents with organic solvent the proportion of organic solvent is replaced by adding the corresponding ester or ester mixture.
- the aforementioned hydrocarbons, mineral spirits or VOC chemicals are used as organic solvents, the structure and composition of which are known to the person skilled in the art and which can be purchased.
- so-called high-boiling solvents are preferably used in order to ensure the highest possible flash point of the mixture obtained.
- a flash point> 100 can be achieved with such mixtures, which has a significant advantage over the conventional cleaning agents of the prior art. Accordingly, less stringent hazard regulations must be observed in the manufacture, transport, storage and use of the cleaning agents according to the invention than has hitherto been necessary with the conventional cleaning agents.
- the mixture of ester and organic solvent is selected so that the highest possible flash point is achieved taking into account other required properties.
- esters When using the esters in a mixture with organic solvent, preferably at least 10% by volume of ester, in particular at least 50% by volume of ester, is provided. In principle, the largest possible proportion of organic solvent should of course be "replaced" by the esters.
- an aqueous emulsion which by adding water and at least one emulsifier to the ester or the ester mixture or to the mixture of ester and organic solvent is available.
- water and at least one emulsifier to the ester or the ester mixture or to the mixture of ester and organic solvent is available.
- the advantageous properties of water can be incorporated into the mixture obtained overall, ie the emulsion.
- To prepare the emulsion in particular 10-90% by volume of water and 1-10% by weight of emulsifier (based on the total weight of the emulsion) are added to the ester or the ester mixture or to the mixture of ester with organic solvent.
- Emulsifier based on the total weight of the emulsion.
- the known compounds are suitable as emulsifiers, nonionic emulsifiers being preferred.
- At least one corrosion inhibitor can be provided which prevents the metallic object from being attacked by the cleaning agent.
- Corrosion inhibitors of this type are added in an amount of up to 3% by weight, preferably between 0.5 and 2% by weight, based on the total weight of the cleaning agent used.
- Compounds which are already known, such as, in particular, aliphatic primary amines, can also be used as corrosion inhibitors.
- At least one surface-active agent can be provided, which is added in particular in an amount of up to 10% by weight, preferably between 0.3 and 3% by weight, based on the total weight of the cleaning agent used.
- Conventional compounds can also be used here, for example polyglycol ethers of long-chain aliphatic alcohols.
- the invention also relates to a preferably liquid cleaning agent for metallic objects, which is preferably provided for cleaning machines and for cleaning motor vehicles and their parts, such as in particular engines or rims.
- This cleaning agent is characterized in that it contains at least 10% by volume of a (C 1 -C 5 ) alkyl ester of an aliphatic (C 8 -C 22 ) monocarboxylic acid or mixtures of such esters.
- the invention relates to a cleaning method for metallic objects, which is preferably provided for cleaning motor vehicles or their parts, such as in particular engines or rims.
- This method is characterized by the use already described or by the use of the cleaning agent described. Reference is expressly made to the corresponding passages in the description.
- the method according to the invention can be carried out in the usual way for cleaning the metallic objects, the esters mentioned being used.
- the cleaning agent is applied to the metallic object to be cleaned, for example the engine or the rim of the motor vehicle, in particular sprayed on.
- the cleaning agent ie usually the cleaning solution, is left to act for a certain time.
- it is preferably rinsed with water or sprayed off preferably removed with steam again from the metallic object.
- it can be dried if necessary.
- a mechanical cleaning treatment can additionally be carried out during at least part of the contact time.
- this involves wiping and / or brushing, for example to additionally mechanically remove the dirt that has been detached from the cleaning agent.
- the process can also be carried out by first pretreating with the cleaning agent according to the invention, possibly with a longer exposure time, and then performing a further cleaning with other customary washing or cleaning agents.
- the ester mixture mentioned has the following properties Melting temperature -10 ° C Vapor pressure (20 ° C) ⁇ 0.01 mbar Density (20 ° C) 0.89 g / cm 3 Viscosity at 25 ° C 6 - 7 mm 2 / s Flash point over non-toxic. 100 ° C
- the mixture described is sprayed onto the rims heavily soiled by normal road traffic. After a few minutes of exposure, the rims are sprayed with steam and dried. The cleaning result can be assessed as very good in comparison to conventional rim cleaners. As already described, in the case of particularly stubborn dirt, the rim can also be brushed after the cleaning agent has been applied.
- a 50:50 (vol.%) Mixture is prepared from the mixture of methyl esters of saturated and unsaturated (C 16 -C 20 ) monocarboxylic acids and mineral spirits described in Example 1 and used in the same manner as in Example 1. The cleaning result is also very good here.
- Example 2 The mixture used in Example 2 is emulsified in 50% by volume of water together with an emulsifier (5% by weight, based on the total weight). If necessary, a corrosion inhibitor and a surface-active agent can be added. Here too, car rims are treated in the same way as in Examples 1 and 2. The cleaning result is also assessed as very good in this third attempt.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
Die Erfindung betrifft eine Verwendung von (C1 - C5) Alkylestern aliphatischer (C8 - C22) Monocarbonsäuren. Weiter betrifft die Erfindung ein Mittel und ein Verfahren zur Reinigung metallischer Gegenstände.The invention relates to the use of (C 1 -C 5 ) alkyl esters of aliphatic (C 8 -C 22 ) monocarboxylic acids. The invention further relates to an agent and a method for cleaning metallic objects.
Aus der EP-B1-435 943 ist die Verwendung von (C1 - C5) Alkylestern aliphatischer (C8 - C22) Monocarbonsäuren zur Entfernung von Druckfarbe von Druckmaschinen bekannt. Dabei werden die aus Gummi bestehenden Auftragwalzen oder Drucktücher mit einem Mittel, das diese Alkylester enthält, behandelt.EP-B1-435 943 discloses the use of (C 1 -C 5 ) alkyl esters of aliphatic (C 8 -C 22 ) monocarboxylic acids for removing printing ink from printing presses. The application rollers or printing blankets made of rubber are treated with an agent which contains these alkyl esters.
Flüssige Metallreinigungsmittel enthalten üblicherweise große Mengen an organischen Lösungsmitteln, die meist aus den Gruppen der unsubstituierten und substituierten Kohlenwasserstoffe, sowie der sog. Testbenzine oder VOC-Chemikalien (volatile organic chemicals), ausgewählt sind. Derartige Lösungsmittel sollen im Zuge der anhaltenden Umweltdiskussion und der sich verschärfenden gesetzlichen Vorschriften weitgehend durch unbedenklichere Chemikalien ersetzt werden.Liquid metal cleaning agents usually contain large amounts of organic solvents, which are mostly selected from the groups of unsubstituted and substituted hydrocarbons, as well as so-called white spirit or VOC chemicals (volatile organic chemicals). In the course of the ongoing environmental discussion and tightening legal regulations, such solvents are to be largely replaced by less hazardous chemicals.
Die Erfindung stellt sich deshalb die Aufgabe, die beschriebenen Nachteile bei den bekannten Metallreinigungsmitteln weitgehend auszuschließen oder völlig zu vermeiden. Als Folge davon sollen auch die üblichen Reinigungsverfahren für metallische Gegenstände verbessert werden.The object of the invention is therefore to largely exclude or completely avoid the disadvantages described in the known metal cleaning agents. As a result, the usual cleaning processes for metallic objects are also to be improved.
Diese Aufgabe wird gelöst durch die Verwendung der eingangs erwähnten Ester gemäß Anspruch 1, das Reinigungsmittel gemäß Anspruch 11 und ein entsprechendes Reinigungsverfahren. Bevorzugte Ausführungsformen dieser Lösungen sind in den abhängigen Ansprüchen 2 bis 10 und 12 bis 14 beschrieben. Der Wortlaut sämtlicher Ansprüche wird durch Bezugnahme zum Inhalt der Beschreibung gemacht.This object is achieved by the use of the esters mentioned at the outset according to claim 1, the cleaning agent according to claim 11 and a corresponding cleaning process. Preferred embodiments of these solutions are described in dependent claims 2 to 10 and 12 to 14. The wording of all claims is incorporated by reference into the content of the description.
Erfindungsgemäß werden die (C1 - C5) Alkylester aliphatischer (C8 - C22) Monocarbonsäuren oder ihre Mischungen zum Reinigen metallischer Gegenstände oder zur Herstellung eines Reinigungsmittels für metallische Gegenstände verwendet. Auf diese Weise kann ein sog. Metallreiniger oder - im üblichen Sprachgebrauch - "Industriereiniger" hergestellt werden, bei dem ein aus sog. nachwachsenden Rohrstoffen erhältliches Produkt eingesetzt werden kann. Dadurch wird solchen Produkten ein neues Einsatzgebiet erschlossen. Die verwendeten Ester sind ungiftig und biologisch abbaubar. Außerdem besitzen sie einen hohen Flammpunkt. Schon aus diesen wenigen Angaben ergeben sich die entscheidenden Vorteile gegenüber den üblichen Reinigungsmitteln, die eine große Menge an den genannten organischen Lösungsmitteln enthalten.According to the invention, the (C 1 -C 5 ) alkyl esters of aliphatic (C 8 -C 22 ) monocarboxylic acids or their mixtures are used for cleaning metallic objects or for producing a cleaning agent for metallic objects. In this way, a so-called metal cleaner or - in common parlance - "industrial cleaner" can be produced, in which a product obtainable from so-called renewable raw materials can be used. This opens up a new area of application for such products. The esters used are non-toxic and biodegradable. They also have a high flash point. From these few details, the decisive advantages over conventional cleaning agents, which contain a large amount of the organic solvents mentioned, result.
Die genannten Ester bzw. ihre Mischungen können grundsätzlich zur Reinigung aller metallischen Gegenstände verwendet werden. Unter Umständen können diese metallischen Gegenstände auch mindestens teilweise mit anderen Materialien beschichtet, beispielsweise lackiert sein. Ein bevorzugtes Einsatzgebiet der Erfindung ist neben der Reinigung von Maschinen insbesondere die Reinigung von Kraftfahrzeugteilen und ggf. von Kraftfahrzeugen selbst, wobei die Ester insbesondere als Motorenreiniger oder Felgenreiniger einsetzbar sind.The esters mentioned or their mixtures can in principle be used to clean all metallic objects. Under certain circumstances, these metallic objects can also be at least partially coated with other materials, for example, be painted. In addition to the cleaning of machines, a preferred area of application of the invention is in particular the cleaning of motor vehicle parts and possibly motor vehicles themselves, the esters being used in particular as engine cleaners or wheel rim cleaners.
Sämtliche Ester, die unter die o.g. Definitionen fallen, sind grundsätzlich verwendbar. Im wesentlichen handelt es sich um die (C1 - C5) Alkylester der Alkancarbonsäuren und deren ungesättigter Vertreter mit 8 - 22 C-Atomen. Diese Ester der sog. mittleren und höheren Fettsäuren (bis C22) sind für die erfindungsgemäße Verwendung handhabbar, wobei die bei Raumtemperatur flüssigen Ester bevorzugt sind.All esters that fall under the above definitions can in principle be used. They are essentially the (C 1 - C 5 ) alkyl esters of alkane carboxylic acids and their unsaturated representatives with 8 - 22 C atoms. These esters of the so-called middle and higher fatty acids (up to C 22 ) can be handled for the use according to the invention, the esters liquid at room temperature being preferred.
Herstellbar sind die Ester in bekannter Weise durch Veresterung der entsprechenden Monocarbonsäure oder einer Mischung solcher Säuren mit dem entsprechenden Alkohol. Die Ester sind auch in üblicher Weise zugänglich durch Umesterung (Alkoholyse) des betreffenden Glycerids (Fett/Öl) mit dem entsprechenden (C1 - C5) Alkohol. Wichtige Vertreter der erfindungsgemäß verwendbaren Ester oder Mischungen solcher Ester werden bereits in großem Maßstab hergestellt und verkauft.The esters can be prepared in a known manner by esterification of the corresponding monocarboxylic acid or a mixture of such acids with the corresponding alcohol. The esters can also be obtained in the usual way by transesterification (alcoholysis) of the glyceride (fat / oil) concerned with the corresponding (C 1 -C 5 ) alcohol. Important representatives of the esters or mixtures of such esters which can be used according to the invention are already being produced and sold on a large scale.
Obwohl grundsätzlich keine Beschränkung bei den eingesetzten Rohstoffen besteht, kommen insbesondere Raps, Sonnenblume, Kokosnuß, Ölpalmkern und Ricinusöl (Samen der Ricinusstaude) als Rohstoffe für die erfindungsgemäß verwendbaren Ester in Frage.Although there is basically no restriction on the raw materials used, rapeseed, sunflower, coconut, oil palm kernel and castor oil (seeds of castor bean) are particularly suitable as raw materials for the esters which can be used according to the invention.
Bei bevorzugten Ausführungsformen der Erfindung werden (C1 -C3) Alkylester der (C8 - C22) Monocarbonsäuren oder deren Mischungen verwendet. Insbesondere sind die Methylester dieser Monocarbonsäuren einsetzbar.In preferred embodiments of the invention (C 1 -C 3 ) alkyl esters of (C 8 -C 22 ) monocarboxylic acids or mixtures thereof are used. In particular, the methyl esters of these monocarboxylic acids can be used.
Weiter sind die Ester aliphatischer (C10 - C22) Monocarbonsäuren bevorzugt, wobei wiederum insbesondere die Ester aliphatischer (C16 - C20) Monocarbonsäuren erfindungsgemäß einsetzbar sind.Furthermore, the esters of aliphatic (C 10 -C 22 ) monocarboxylic acids are preferred, the esters of aliphatic (C 16 -C 20 ) monocarboxylic acids in particular being usable in accordance with the invention.
Grundsätzlich können bei der Erfindung sowohl die Ester aliphatischer, gesättigter Monocarbonsäuren als auch die Ester aliphatischer, ungesättigter Monocarbonsäuren verwendet werden. Aufgrund der guten Verfügbarkeit und der meist ausreichenden Reinigungswirkung sind die Ester aliphatischer, gesättigter Monocarbonsäuren (und deren Gemische) bevorzugt. Ein Einsatz von Estern aliphatischer, ungesättigter Monocarbonsäuren oder vorzugsweise von Mischungen von Estern aliphatischer, gesättigter Monocarbonsäuren mit Estern aliphatischer, ungesättigter Monocarbonsäuren empfiehlt sich dann, wenn eine verstärkte Reinigungswirkung angestrebt wird, die mit dem Anteil an Estern aliphatischer, ungesättigter Monocarbonsäuren in Verbindung gebracht werden kann. Ein Einsatz solcher Mischungen ist auch dann vorteilhaft, wenn sich diese bei der Herstellung aus einem entsprechenden Fett oder Öl zwanglos ergibt, so daß weitere Aufarbeitungs- und Trennungsschritte entfallen können. Wenn Ester aliphatischer, ungesättigter Monocarbonsäuren eingesetzt werden, sind bevorzugt einfach ungesättigte bis dreifach ungesättigte Monocarbonsäuren vorgesehen. Hierbei kann es sich beispielsweise um Ölsäure, Erucasäure, Linolsäure oder Linolensäure handeln. Wie bereits erwähnt, können auch bevorzugt Ester der Ricinolsäure eingesetzt werden.In principle, both the esters of aliphatic, saturated monocarboxylic acids and the esters of aliphatic, unsaturated monocarboxylic acids can be used in the invention. The esters of aliphatic, saturated monocarboxylic acids (and their mixtures) are preferred on account of the good availability and the mostly sufficient cleaning action. The use of esters of aliphatic, unsaturated monocarboxylic acids or, preferably, of mixtures of esters of aliphatic, saturated monocarboxylic acids with esters of aliphatic, unsaturated monocarboxylic acids is recommended when an increased cleaning action is desired, which can be associated with the proportion of esters of aliphatic, unsaturated monocarboxylic acids . The use of such mixtures is also advantageous if they result from the production of a corresponding fat or oil, so that further processing and separation steps can be omitted. If esters of aliphatic, unsaturated monocarboxylic acids are used, monounsaturated to triunsaturated monocarboxylic acids are preferably provided. This can be, for example, oleic acid, erucic acid, linoleic acid or linolenic acid. As already mentioned, esters of ricinoleic acid can also preferably be used.
Gemäß der Erfindung können die genannten Ester nicht nur als solche, d.h. unverdünnt (ggf. mit geeigneten Additiven), sondern auch in Mischung mit mindestens einem organischen Lösungsmittel verwendet werden. Dabei kann so vorgegangen werden, daß bei den bisher bekannten Metallreinigungsmitteln mit organischem Lösungsmittel der Anteil an organischem Lösungsmittel durch Zugabe der entsprechenden Ester bzw. Estermischung ersetzt wird. Bei allen diesen bevorzugten Ausführungsformen werden als organische Lösungsmittel die bereits genannten Kohlenwasserstoffe, Testbenzine oder VOC-Chemikalien eingesetzt, deren Aufbau und Zusammensetzung dem Fachmann bekannt sind und die käuflich erworben werden können. Bei allen Ausführungsformen unter Zusatz eines organischen Lösungsmittels werden vorzugsweise sog. hochsiedende Lösungsmittel verwendet, um insgesamt einen möglichst hohen Flammpunkt der erhaltenen Mischung zu gewährleisten. Insbesondere kann erfindungsgemäß dadurch bei solchen Mischungen ein Flammpunkt > 100 erreicht werden, was gegenüber den üblichen Reinigungsmitteln des Standes der Technik einen wesentlichen Vorteil bringt. Dementsprechend müssen bei Herstellung, Transport, Lagerung und Verwendung der erfindungsgemäßen Reinigungsmittel weniger strenge Gefahrenvorschriften beachtet werden als dies bei den üblichen Reinigungsmitteln bisher erforderlich ist. Im Rahmen der Erfindung wird das Gemisch aus Ester und organischem Lösungsmittel so ausgewählt, daß unter Berücksichtigung anderer geforderter Eigenschaften ein möglichst hoher Flammpunkt erreicht wird.According to the invention, the esters mentioned can be used not only as such, ie undiluted (if appropriate with suitable additives), but also in a mixture with at least one organic solvent. It can be done in such a way that the previously known metal cleaning agents with organic solvent the proportion of organic solvent is replaced by adding the corresponding ester or ester mixture. In all of these preferred embodiments, the aforementioned hydrocarbons, mineral spirits or VOC chemicals are used as organic solvents, the structure and composition of which are known to the person skilled in the art and which can be purchased. In all embodiments with the addition of an organic solvent, so-called high-boiling solvents are preferably used in order to ensure the highest possible flash point of the mixture obtained. In particular, according to the invention, a flash point> 100 can be achieved with such mixtures, which has a significant advantage over the conventional cleaning agents of the prior art. Accordingly, less stringent hazard regulations must be observed in the manufacture, transport, storage and use of the cleaning agents according to the invention than has hitherto been necessary with the conventional cleaning agents. In the context of the invention, the mixture of ester and organic solvent is selected so that the highest possible flash point is achieved taking into account other required properties.
Bei der Verwendung der Ester in Mischung mit organischem Lösungsmittel sind vorzugsweise mindestens 10 Vol.% Ester, insbesondere mindestens 50 Vol.% Ester, vorgesehen. Grundsätzlich soll selbstverständlich ein möglichst großer Anteil an organischem Lösungsmittel durch die Ester "ersetzt" werden.When using the esters in a mixture with organic solvent, preferably at least 10% by volume of ester, in particular at least 50% by volume of ester, is provided. In principle, the largest possible proportion of organic solvent should of course be "replaced" by the esters.
Bei weiteren bevorzugten Ausführungsformen der Erfindung wird eine wäßrige Emulsion eingesetzt, die durch Zugabe von Wasser und mindestens einem Emulgator zu dem Ester bzw. der Estermischung oder zu dem Gemisch aus Ester und organischem Lösungsmittel erhältlich ist. Dadurch können die vorteilhaften Eigenschaften von Wasser in die insgesamt erhaltene Mischung, d.h. die Emulsion, eingebracht werden. Zur Herstellung der Emulsion werden zum Ester bzw. der Estermischung oder zu der Mischung aus Ester mit organischem Lösungsmittel insbesondere 10 - 90 Vol.% Wasser und 1 - 10 Gew.% an Emulgator (bezogen auf das Gesamtgewicht der Emulsion) zugegeben. Innerhalb der genannten Bereiche ist es bevorzugt, wenn 10 - 50 Vol.% Wasser bzw. 2 - 5 Gew.% an Emulgator (bezogen auf das Gesamtgewicht der Emulsion) zugegeben sind. Als Emulgatoren sind die bekannten Verbindungen geeignet, wobei nichtionische Emulgatoren bevorzugt sind.In further preferred embodiments of the invention, an aqueous emulsion is used, which by adding water and at least one emulsifier to the ester or the ester mixture or to the mixture of ester and organic solvent is available. As a result, the advantageous properties of water can be incorporated into the mixture obtained overall, ie the emulsion. To prepare the emulsion, in particular 10-90% by volume of water and 1-10% by weight of emulsifier (based on the total weight of the emulsion) are added to the ester or the ester mixture or to the mixture of ester with organic solvent. Within the ranges mentioned, it is preferred if 10-50 vol.% Water or 2-5 wt.% Emulsifier (based on the total weight of the emulsion) is added. The known compounds are suitable as emulsifiers, nonionic emulsifiers being preferred.
Erfindungsgemäß kann mindestens ein Korrosionsinhibitor vorgesehen sein, der verhindert, daß der metallische Gegenstand vom Reinigungsmittel angegriffen wird. Derartige Korrosionsinhibitoren sind in einer Menge bis 3 Gew.%, vorzugsweise zwischen 0,5 und 2 Gew.%, bezogen auf das Gesamtgewicht des verwendeten Reinigungsmittels, zugegeben. Auch als Korrosionsinhibitoren können bereits bekannte Verbindungen, wie insbesondere aliphatische primäre Amine, verwendet werden.According to the invention, at least one corrosion inhibitor can be provided which prevents the metallic object from being attacked by the cleaning agent. Corrosion inhibitors of this type are added in an amount of up to 3% by weight, preferably between 0.5 and 2% by weight, based on the total weight of the cleaning agent used. Compounds which are already known, such as, in particular, aliphatic primary amines, can also be used as corrosion inhibitors.
Schließlich kann bei anderen bevorzugten Ausführungsformen der Erfindung mindestens ein oberflächenaktives Mittel vorgesehen sein, das insbesondere in einer Menge bis 10 Gew.%, vorzugsweise zwischen 0,3 und 3 Gew.%, bezogen auf das Gesamtgewicht des verwendeten Reinigungsmittels, zugegeben ist. Auch hier sind übliche Verbindungen einsetzbar wie beispielsweise Polyglykolether langkettiger aliphatischer Alkohole.Finally, in other preferred embodiments of the invention, at least one surface-active agent can be provided, which is added in particular in an amount of up to 10% by weight, preferably between 0.3 and 3% by weight, based on the total weight of the cleaning agent used. Conventional compounds can also be used here, for example polyglycol ethers of long-chain aliphatic alcohols.
Der Vollständigkeit halber sei erwähnt, daß je nach verwendetem Einsatzgebiet weitere Additive wie beispielweise Stabilisatoren oder Antioxidantien in Kombination mit den Estern erfindungsgemäß verwendet werden können.For the sake of completeness, it should be mentioned that, depending on the field of use used, further additives such as stabilizers or antioxidants can be used in combination with the esters according to the invention.
Wie bereits erwähnt, betrifft die Erfindung auch ein vorzugsweise flüssiges Reinigungsmittel für metallische Gegenstände, das vorzugsweise zur Reinigung von Maschinen und zur Reinigung von Kraftfahrzeugen und deren Teilen, wie insbesondere Motoren oder Felgen, vorgesehen ist. Dieses Reinigungsmittel ist dadurch gekennzeichnet, daß es mindestens 10 Vol.% eines (C1 - C5) Alkylesters einer aliphatischen (C8 - C22) Monocarbonsäure oder Mischungen solcher Ester enthält.As already mentioned, the invention also relates to a preferably liquid cleaning agent for metallic objects, which is preferably provided for cleaning machines and for cleaning motor vehicles and their parts, such as in particular engines or rims. This cleaning agent is characterized in that it contains at least 10% by volume of a (C 1 -C 5 ) alkyl ester of an aliphatic (C 8 -C 22 ) monocarboxylic acid or mixtures of such esters.
Weitere Merkmale dieses Reinigungsmittels ergeben sich aus den bereits bei der Verwendung der Ester beschriebenen Merkmale, wobei diese Merkmale sowohl einzeln als auch in Kombination miteinander verwirklicht sein können.Further features of this cleaning agent result from the features already described when using the esters, wherein these features can be implemented both individually and in combination with one another.
Schließlich betrifft die Erfindung ein Reinigungsverfahren für metallische Gegenstände, das vorzugsweise zur Reinigung von Kraftfahrzeugen oder deren Teilen, wie insbesondere Motoren oder Felgen, vorgesehen ist. Dieses Verfahren ist durch die bereits beschriebene Verwendung oder durch den Einsatz des beschriebenen Reinigungsmittels gekennzeichnet. Auf die entsprechenden Passagen der Beschreibung wird ausdrücklich Bezug genommen.Finally, the invention relates to a cleaning method for metallic objects, which is preferably provided for cleaning motor vehicles or their parts, such as in particular engines or rims. This method is characterized by the use already described or by the use of the cleaning agent described. Reference is expressly made to the corresponding passages in the description.
Grundsätzlich kann das erfindungsgemäße Verfahren in bisher üblicher Weise bei der Reinigung der metallischen Gegenstände durchgeführt werden, wobei die genannten Ester zum Einsatz kommen. Bei bevorzugten Ausführungsformen wird das Reinigungsmittel auf den zu reinigenden metallischen Gegenstand, beispielsweise den Motor oder die Felge des Kraftfahrzeugs, aufgebracht, insbesondere aufgesprüht. Dann läßt man das Reinigungsmittel, d.h. üblicherweise die Reinigungslösung, für eine bestimmte Zeit einwirken. Anschließend wird sie durch Spülen vorzugsweise mit Wasser oder durch Absprühen vorzugsweise mit Wasserdampf wieder von dem metallischen Gegenstand entfernt. Dann kann dieser ggf. getrocknet werden.In principle, the method according to the invention can be carried out in the usual way for cleaning the metallic objects, the esters mentioned being used. In preferred embodiments, the cleaning agent is applied to the metallic object to be cleaned, for example the engine or the rim of the motor vehicle, in particular sprayed on. Then the cleaning agent, ie usually the cleaning solution, is left to act for a certain time. Then it is preferably rinsed with water or sprayed off preferably removed with steam again from the metallic object. Then it can be dried if necessary.
Um die Reinigungswirkung zu verbessern, kann mindestens während eines Teils der Einwirkzeit zusätzlich eine mechanische Reinigungsbehandlung vorgenommen werden. Dabei handelt es sich insbesondere um ein Wischen und/oder Bürsten, um beispielsweise die vom Reinigungsmittel angelösten Verschmutzungen zusätzlich mechanisch zu entfernen. Gegebenenfalls kann das Verfahren auch so durchgeführt werden, daß zunächst eine Vorbehandlung mit dem erfindungsgemäßen Reinigungsmittel, ggf. mit längerer Einwirkzeit, und anschließend eine weitere Reinigung mit anderen üblichen Wasch- oder Reinigungsmitteln durchgeführt wird.In order to improve the cleaning effect, a mechanical cleaning treatment can additionally be carried out during at least part of the contact time. In particular, this involves wiping and / or brushing, for example to additionally mechanically remove the dirt that has been detached from the cleaning agent. If appropriate, the process can also be carried out by first pretreating with the cleaning agent according to the invention, possibly with a longer exposure time, and then performing a further cleaning with other customary washing or cleaning agents.
Die beschriebenen Merkmale und weitere Merkmale der Erfindung ergeben sich aus der folgenden Beispielen in Verbindung mit den Unteransprüchen. Hierbei können die einzelnen Merkmale jeweils für sich oder in Kombination miteinander verwirklicht sein.The described features and further features of the invention result from the following examples in conjunction with the subclaims. The individual features can be implemented individually or in combination with one another.
Zur Reinigung von Autofelgen wird ein aus Ricinusöl erhältliches Gemisch aus Methylestern von (C16 - C20) gesättigten und ungesättigten Monocarbonsäuren eingesetzt. Ein derartiges Gemisch ist als industrieller Grundstoff kommerziell erhältlich.To clean car rims, a mixture of methyl esters of (C 16 - C 20 ) saturated and unsaturated monocarboxylic acids available from castor oil is used. Such a mixture is commercially available as an industrial base material.
Das genannte Estergemisch besitzt die folgenden Eigenschaften
Das beschriebene Gemisch wird auf die durch den normalen Straßenverkehr stark verschmutzten Felgen aufgesprüht. Nach einigen Minuten Einwirkzeit werden die Felgen mit Wasserdampf abgesprüht und getrocknet. Das Reinigungsergebnis kann als sehr gut im Vergleich zu üblichen Felgenreinigern beurteilt werden. Wie bereits beschrieben, kann bei besonders hartnäckigen Verschmutzungen die Felge nach auf Aufbringen des Reinigungsmittels zusätzlich gebürstet werden.The mixture described is sprayed onto the rims heavily soiled by normal road traffic. After a few minutes of exposure, the rims are sprayed with steam and dried. The cleaning result can be assessed as very good in comparison to conventional rim cleaners. As already described, in the case of particularly stubborn dirt, the rim can also be brushed after the cleaning agent has been applied.
Aus dem in Beispiel 1 beschriebenen Gemisch von Methylestern gesättigter und ungesättigter (C16 - C20) Monocarbonsäuren und Testbenzin wird eine 50:50 (Vol.%) Mischung hergestellt und in gleicher Weise wie in Beispiel 1 verwendet. Auch hier ist das Reinigungsergebnis sehr gut.A 50:50 (vol.%) Mixture is prepared from the mixture of methyl esters of saturated and unsaturated (C 16 -C 20 ) monocarboxylic acids and mineral spirits described in Example 1 and used in the same manner as in Example 1. The cleaning result is also very good here.
Das in Beispiel 2 verwendete Gemisch wird in 50 Vol.% Wasser zusammen mit einem Emulgator (5 Gew.%, bezogen auf Gesamtgewicht) emulgiert. Gegebenenfalls kann ein Korrosionsinhibitor sowie ein oberflächenaktives Mittel zugesetzt werden. Auch hier werden Autofelgen in der gleichen Weise wie in den Beispielen 1 und 2 behandelt. Auch bei diesem dritten Versuch wird das Reinigungsergebnis als sehr gut beurteilt.The mixture used in Example 2 is emulsified in 50% by volume of water together with an emulsifier (5% by weight, based on the total weight). If necessary, a corrosion inhibitor and a surface-active agent can be added. Here too, car rims are treated in the same way as in Examples 1 and 2. The cleaning result is also assessed as very good in this third attempt.
Die in den Beispielen 1 bis 3 beschriebenen Gemische werden in üblicher Weise für die Motorwäsche bei einem Kraftfahrzeug eingesetzt. Dabei werden im Vergleich mit üblichen Motorreinigern ebenfalls sehr gute Ergebnisse erzielt.The mixtures described in Examples 1 to 3 are used in the usual way for engine washing in a motor vehicle used. Very good results are also achieved in comparison with conventional engine cleaners.
Claims (14)
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DE19532284 | 1995-09-01 | ||
DE19532284A DE19532284A1 (en) | 1995-09-01 | 1995-09-01 | Use of (C¶1¶ - C¶5¶) alkyl esters of aliphatic (C¶8¶ - C¶2¶¶2¶) monocarboxylic acids for cleaning metallic objects |
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EP0761843A3 EP0761843A3 (en) | 1997-04-23 |
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EP96112644A Withdrawn EP0761843A2 (en) | 1995-09-01 | 1996-08-06 | Use of (C1-C5) alkyl esters of aliphatic (C8-C22) monocarboxylic acid for cleaning metal objects |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999006021A1 (en) * | 1997-07-31 | 1999-02-11 | Kimberly-Clark Limited | Hand cleanser |
US7533677B2 (en) | 2004-06-10 | 2009-05-19 | Brilliance Intellectual Property Limited | Cleaning composition comprising a branched ester and an organic solute |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3537619A1 (en) * | 1985-10-23 | 1987-04-23 | Bayer Ag | Agents for cold washing |
EP0435943A1 (en) * | 1988-09-26 | 1991-07-10 | Aarhus Oliefabrik As | USE OF (C-1 to C-5) ALKYL ESTERS OF ALIPHATIC (C-8 to C-22) MONOCARBOXYLIC ACIDS FOR REMOVING INKS AND THE LIKE FROM PRINTING MACHINES. |
WO1992009378A1 (en) * | 1990-11-29 | 1992-06-11 | Petroferm Inc. | A process and composition for cleaning contaminants with terpene and monobasic ester |
EP0498545A1 (en) * | 1991-01-29 | 1992-08-12 | Du Pont (UK) Limited | Improvements in or relating to printing |
WO1992020835A1 (en) * | 1991-05-21 | 1992-11-26 | Henkel Kommanditgesellschaft Auf Aktien | Use of 2-ethylhexyl esters of fatty acids as cold-cleaning agents |
WO1992022631A1 (en) * | 1991-06-11 | 1992-12-23 | Beku Environmental Products Ltd. | Degreaser composition comprising monounsaturated wax ester |
WO1993011213A1 (en) * | 1991-12-03 | 1993-06-10 | E.I. Du Pont De Nemours And Company | A cleaning composition |
US5264045A (en) * | 1992-06-04 | 1993-11-23 | Alfred Zofchak | Method for cleaning mechanical surfaces covered with grease, oil and other sticky materials |
WO1994023012A1 (en) * | 1993-04-02 | 1994-10-13 | The Dow Chemical Company | Microemulsion and emulsion cleaning compositions |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH193031A (en) * | 1937-01-21 | 1937-09-30 | Haerry Gottlieb | Process for the preparation of an agent for washing and polishing. |
US2418908A (en) * | 1942-04-08 | 1947-04-15 | Nat Carbon Co Inc | Cleaning composition for removing sludge from internal-combustion engines |
ES2083447T3 (en) * | 1989-01-13 | 1996-04-16 | Martin Marietta Corp | ATOXIC AND FLAMMABLE CLEANER FOR THE CLEANING OF PRINTED PLATES. |
US5128057A (en) * | 1989-09-29 | 1992-07-07 | Kyzen Corporation | Furfuryl alcohol mixtures for use as cleaning agents |
FR2697265B1 (en) * | 1992-10-28 | 1994-12-09 | Atochem Elf Sa | Use of an alkylene glycol etheroxide ester for degreasing the surface of an object and process and composition for this use. |
EP0619364A1 (en) * | 1993-04-09 | 1994-10-12 | Purac Biochem N.V. | A non-ozone depleting cleaning composition for degreasing and defluxing purposes |
-
1995
- 1995-09-01 DE DE19532284A patent/DE19532284A1/en not_active Withdrawn
-
1996
- 1996-08-06 EP EP96112644A patent/EP0761843A2/en not_active Withdrawn
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3537619A1 (en) * | 1985-10-23 | 1987-04-23 | Bayer Ag | Agents for cold washing |
EP0435943A1 (en) * | 1988-09-26 | 1991-07-10 | Aarhus Oliefabrik As | USE OF (C-1 to C-5) ALKYL ESTERS OF ALIPHATIC (C-8 to C-22) MONOCARBOXYLIC ACIDS FOR REMOVING INKS AND THE LIKE FROM PRINTING MACHINES. |
WO1992009378A1 (en) * | 1990-11-29 | 1992-06-11 | Petroferm Inc. | A process and composition for cleaning contaminants with terpene and monobasic ester |
EP0498545A1 (en) * | 1991-01-29 | 1992-08-12 | Du Pont (UK) Limited | Improvements in or relating to printing |
WO1992020835A1 (en) * | 1991-05-21 | 1992-11-26 | Henkel Kommanditgesellschaft Auf Aktien | Use of 2-ethylhexyl esters of fatty acids as cold-cleaning agents |
WO1992022631A1 (en) * | 1991-06-11 | 1992-12-23 | Beku Environmental Products Ltd. | Degreaser composition comprising monounsaturated wax ester |
WO1993011213A1 (en) * | 1991-12-03 | 1993-06-10 | E.I. Du Pont De Nemours And Company | A cleaning composition |
US5264045A (en) * | 1992-06-04 | 1993-11-23 | Alfred Zofchak | Method for cleaning mechanical surfaces covered with grease, oil and other sticky materials |
WO1994023012A1 (en) * | 1993-04-02 | 1994-10-13 | The Dow Chemical Company | Microemulsion and emulsion cleaning compositions |
Non-Patent Citations (1)
Title |
---|
AUTOMOTIVE ENGINEERING, Bd. 103, Nr. 8, 1.August 1995, Seite 23/24, 27 XP000518063 HOLT D: "FORD ADOPTS REPLACEMENT DEGREASING PROCESS" * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999006021A1 (en) * | 1997-07-31 | 1999-02-11 | Kimberly-Clark Limited | Hand cleanser |
US6432429B1 (en) | 1997-07-31 | 2002-08-13 | Kimberly-Clark Worldwide, Inc. | Hand cleanser |
US7533677B2 (en) | 2004-06-10 | 2009-05-19 | Brilliance Intellectual Property Limited | Cleaning composition comprising a branched ester and an organic solute |
USRE42136E1 (en) * | 2004-06-10 | 2011-02-15 | Brilliance Intellectual Property Limited | Cleaning composition comprising a branched ester and an organic solute |
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DE19532284A1 (en) | 1997-03-06 |
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