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EP1468065A1 - Cleaning agents for the outer surfaces of means of transport - Google Patents

Cleaning agents for the outer surfaces of means of transport

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Publication number
EP1468065A1
EP1468065A1 EP02806022A EP02806022A EP1468065A1 EP 1468065 A1 EP1468065 A1 EP 1468065A1 EP 02806022 A EP02806022 A EP 02806022A EP 02806022 A EP02806022 A EP 02806022A EP 1468065 A1 EP1468065 A1 EP 1468065A1
Authority
EP
European Patent Office
Prior art keywords
mol
aircraft
molecular weight
composition according
radicals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02806022A
Other languages
German (de)
French (fr)
Other versions
EP1468065B1 (en
Inventor
Ingo Jeschke
Achim Stankowiak
Wolfgang Huber
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.)
Clariant Produkte Deutschland GmbH
Original Assignee
Clariant Produkte Deutschland GmbH
Clariant GmbH
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
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Application filed by Clariant Produkte Deutschland GmbH, Clariant GmbH filed Critical Clariant Produkte Deutschland GmbH
Publication of EP1468065A1 publication Critical patent/EP1468065A1/en
Application granted granted Critical
Publication of EP1468065B1 publication Critical patent/EP1468065B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66—Non-ionic compounds
    • C11D1/75—Amino oxides
    • 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
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3719—Polyamides or polyimides
    • 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

Definitions

  • the present invention relates to cleaning agents for removing heavy soiling from the outside of vehicles, containing amine oxides and polypeptides.
  • Aircraft exterior cleaners are not only used to clean dirty aircraft, but are also essential for the economical operation of aircraft.
  • Aluminum surfaces of aircraft are permanently contaminated by aviation fuel, carbon from the combustion gases and lubricants during flight operations.
  • the surface roughness increases due to the dirt, so that the air flow required for buoyancy becomes slightly more turbulent. This requires more propulsion and therefore more fuel to keep the aircraft at the desired cruising speed. Contamination can also cause corrosion of the aluminum components, which can lead to a considerable impairment of flight safety.
  • Aircraft exterior cleaners have to meet a large number of requirements.
  • SAE specification AMS (Aerospace Material Standards) 1526 (Cleaner for aircraft exterior surfaces, water-miscible, pressure-spraying type), the effects of corrosion, hydrogen embrittlement, material compatibility and the stability of the cleaning agent are examined.
  • Aircraft exterior cleaners are known in the prior art which contain aqueous solutions of surfactants, organic solvents and inorganic substances are.
  • the inorganic ingredients promote the abrasion of the dirt particles.
  • these water-insoluble components often cause a matt film on the surface of the aircraft if the cleaner is not subsequently rinsed completely with clear water.
  • the organic solvents are very harmful to aquatic organisms when disposing of the cleaners. In addition, they cause unpleasant smells and promote the risk of ignition due to their low vapor pressure.
  • aircraft cleaning agents were mostly formulated with poorly degradable and environmentally hazardous corrosion inhibitors, such as sodium nitrate, sodium nitrite or thiourea.
  • US-3458 300 discloses a cleaner containing alumina particles by which dirt from aircraft surfaces is to be ground. Antistatic surfactants prevent the dirt particles from settling on the outer skin again.
  • US-3491 027 discloses a cleaning solution that is used on aircraft that operate primarily near the sea.
  • the agent is suitable for removing salt deposits from aircraft surfaces.
  • US-3948819 discloses the synergistic effect which is obtained by the choice of two non-ionic surfactants as dirt removers. A method for assessing the cleaning effect is described.
  • US-5496413 discloses the connection of cleaning and growing components in a single cleaner.
  • US Pat. No. 5,516,459 discloses the use of alkylamine oxides in thickened aircraft exterior cleaners, but the pH of the cleaners is far in the alkaline range and requires environmentally harmful alkali metal nitrites to inhibit corrosion.
  • US Pat. No. 5,880,078 discloses that the desired soil release behavior can be achieved by a combination of ethoxylated fatty alcohols with different HLB values.
  • the object of the invention was therefore to develop an aircraft exterior cleaner which not only effectively removes dirt but also contains environmentally friendly corrosion inhibitors.
  • the cleaner should be free of solvents and other substances that can cause unpleasant smells due to their low vapor pressure, are highly flammable and can also be hazardous to health.
  • the cleaner is said to be suitable for other means of transport in addition to aircraft.
  • cleaning agents based on tertiary amine oxides and polypeptides are particularly effective as corrosion inhibitors.
  • the invention thus relates to the use of a composition for cleaning the outside of vehicles, comprising
  • Percentages by weight are in each case based on the weight of the composition.
  • the composition contains 10 to 30% by weight of component a), 0.01 to 1% by weight of component b) and water ad 100% by weight.
  • the preferred weight ratio between components a) and b) is between 15: 1 and 2500: 1.
  • a preferred object of the invention is the use of the composition according to the invention as an external cleaning agent for aircraft.
  • Another object of the invention is a method for cleaning the outside of means of transport, in particular aircraft, by applying the composition according to the invention to the outer skin of the means of transport to be cleaned.
  • the component a) of the composition according to the invention preferably makes up 15 to 25% by weight of the total weight.
  • Ri preferably represents an alkyl, alkenyl, alkoxypropyl or alkenylamidoalkyl group with 10 to 16 carbon atoms.
  • R 2 and R 3 are preferably alkyl radicals having 1 to 6, in particular 1 to 4, carbon atoms or can also be hydroxyethyl or
  • Hydroxypropyl radicals mean.
  • component a) are: cocoalkyldimethylamine oxide, stearyldimethylamine oxide, lauryldimethylamine oxide and Ci 4 -alkyldimethylamine oxide.
  • Component a) can also be a mixture of the amine oxides mentioned.
  • the component b) is an alkali metal salt of polyaspartic acid or polyglutamic acid with a molecular weight of preferably 7,000 g / mol to 20,000 g / mol, or a mixture of both substances.
  • These are easily degradable, non-toxic and water-soluble biopolymers, especially polypeptides. So far, these compounds have mainly been used as dispersants in cooling water and for removing limescale. It has been shown that these substances are also outstandingly suitable as corrosion inhibitors for use in aircraft exterior cleaners. Defoamers, dyes, complexing agents and antioxidants can also be contained in the cleaners.
  • the pH of aircraft exterior cleaners should generally be 6.5 to 11, preferably 9 to 10. If the composition according to the invention does not have such a pH value, it can be adjusted by means of suitable pH regulators.
  • suitable basic compounds for this purpose are those from the group of alkali metal hydroxides, such as NaOH and KOH.
  • composition according to the invention is produced by mixing the individual components in any order, which can be done, for example, in a container equipped with a stirrer.
  • the resulting formulations show an excellent dirt dissolving power. Practical tests on motor vehicles have shown that even stubborn insect contamination on windshields can be easily removed. The agent leaves no streaks, contains no organic solvents and only contains environmentally friendly and easily degradable corrosion inhibitors.
  • the cleaning effect is assessed by dirt dissolving tests.
  • a 2024-T3 aluminum sheet measuring 5 x 2 cm and 1 mm thick is used for this. Before starting the experiment, the aluminum sheet is first etched with a dilute sodium hydroxide solution and then with a dilute nitric acid solution. This roughenes the surface so that dirt particles can stick to the sheet better.
  • the sheet is alternately provided with different impurities. These include plain bearing grease, petroleum jelly and artificially generated aircraft dirt.
  • 100 g of this artificial aircraft dirt consists of 1 g lanolin, 20 g activated carbon, 10 g talc, 15 g lubricating oil and 54 g kerosene.
  • the components are intimately mixed together and applied to the aluminum sheet in a thin film.
  • the dirt is then burned into the aluminum sheet in a drying cabinet at 100 ° C for 12 hours.
  • the aluminum plate provided with plain bearing grease, petroleum jelly or artificial aircraft dirt is immersed in a solution of 100 ml cleaning agent.
  • the solution is a beaker in which a magnetic stirrer rotates at 500 revolutions per minute.
  • the detached dirt components are assessed at regular intervals.
  • An aircraft cleaning agent according to the invention is produced by mixing the following components (concentrate):
  • Example 1 Further investigations of the aircraft cleaning agent described under Example 1 show that all further requirements of the SAE specification AMS 1526 are met.
  • the agent does not cause corrosion on aluminum, magnesium and steel alloys and does not affect acrylic glass, nor painted and unpainted aircraft surfaces.
  • An aircraft cleaning agent according to the invention is produced by mixing the following components (concentrate):
  • This cleaning agent also removes all impurities and meets the requirements of the SAE specification AMS 1526.
  • An aircraft cleaning agent according to the invention is produced by mixing the following components (concentrate):
  • This cleaning agent also removes all impurities and meets the requirements of the SAE specification AMS 1526.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Detergent Compositions (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Abstract

The invention relates to the use of a composition for cleaning the outside of means of transportation. Said composition contains a) at least one tertiary amino oxide of formula R1R2R3NO, whereby R1 represents an alkylamidoalkyl, alkenylamidoalkyl, alkoxypropylamidoalkyl or alkenylamidoalkyl group having between 8 -18 C-atoms, R2 and R3 represent, independently from each other, low molecular alkyl radicals or hydroxyethyl radicals or hydroxypropyl radicals, b) at least one alkali metal salt of polyasparaginic acid having a molecular weight of between 5.000 g/mol - 50.000 g/mol, or a polyglutaminic acid having a molecular weight of between 5.000 g/mol - 50.000 g/mol, or a mixture of both substances, whereby the weight ratio of the components a):b) is between 10:1 and 3000:1.

Description

REINIGUNGSMITTEL FÜR VERKEHRSMITTELAUSSENFLACHEN CLEANER FOR EXTERNAL SURFACE AREAS

Beschreibungdescription

Umweltfreundliche Reinigungsmittel für VerkehrsmittelaußenflächenEnvironmentally friendly cleaning agents for exterior surfaces of vehicles

Die vorliegende Erfindung betrifft Reinigungsmittel zur Entfernung starker Verunreinigungen von Verkehrsmittelaußenflächen, enthaltend Aminoxide und Polypeptide.The present invention relates to cleaning agents for removing heavy soiling from the outside of vehicles, containing amine oxides and polypeptides.

Auf den Außenflächen von Verkehrsmitteln, wie beispielsweise PKW, LKW, Zügen, Straßenbahnen und insbesondere Flugzeugen kommt es regelmäßig zu starken, schwer zu entfernenden Verschmutzungen. Solche Verschmutzungen sind in besonderem Maße auf der Außenhaut von Flugzeugen nicht tolerierbar.On the outer surfaces of means of transport, such as cars, trucks, trains, trams and in particular airplanes, there is regularly heavy, difficult to remove dirt. Such contamination is particularly intolerable on the outer skin of aircraft.

Flugzeugaußenreiniger dienen nicht ausschließlich zur Reinigung verschmutzter Flugzeuge, sondern sie sind auch für den wirtschaftlichen Betrieb von Flugzeugen wesentlich. Aluminiumoberflächen von Flugzeugen werden während des Flugbetriebs permanent durch Flugbenzin, Kohlenstoff der Verbrennungsabgase und Schmiermittel verunreinigt. Durch den Schmutz nimmt die Oberflächenrauheit zu, so dass der für den Auftrieb notwendige Luftstrom geringfügig turbulenter wird. Dadurch wird mehr Antriebskraft und somit auch mehr Treibstoff benötigt, um das Flugzeug auf der gewünschten Reisegeschwindigkeit zu halten. Verunreinigungen können zusätzlich Korrosionen der Aluminiumbauteile verursachen, was zu einer erheblichen Beeinträchtigung der Flugsicherheit führen kann.Aircraft exterior cleaners are not only used to clean dirty aircraft, but are also essential for the economical operation of aircraft. Aluminum surfaces of aircraft are permanently contaminated by aviation fuel, carbon from the combustion gases and lubricants during flight operations. The surface roughness increases due to the dirt, so that the air flow required for buoyancy becomes slightly more turbulent. This requires more propulsion and therefore more fuel to keep the aircraft at the desired cruising speed. Contamination can also cause corrosion of the aluminum components, which can lead to a considerable impairment of flight safety.

Flugzeugaußenreiniger müssen einer großen Zahl von Anforderungen genügen. Gemäß der SAE-Spezifikation AMS (Aerospace Material Standards) 1526 (Cleaner for aircraft exterior surfaces, water-miscible, pressure-spraying type) werden Korrosionswirkung, Wasserstoffversprödung, Materialverträglichkeit und die Stabilität des Reinigungsmittels untersucht.Aircraft exterior cleaners have to meet a large number of requirements. According to the SAE specification AMS (Aerospace Material Standards) 1526 (Cleaner for aircraft exterior surfaces, water-miscible, pressure-spraying type), the effects of corrosion, hydrogen embrittlement, material compatibility and the stability of the cleaning agent are examined.

Im Stand der Technik sind Flugzeugaußenreiniger bekannt, welche wässrige Lösungen von Tensiden, organischen Lösemitteln und anorganischen Substanzen sind. Die anorganischen Inhaltstoffe fördern den Abrieb der Schmutzpartikel. Allerdings verursachen diese wasserunlöslichen Bestandteile oft einen matten Film auf der Flugzeugoberfläche, wenn der Reiniger nicht anschließend vollständig mit klarem Wasser abgespült wird. Die organischen Lösemittel sind bei der Entsorgung der Reiniger sehr schädlich für Wasserorganismen. Zusätzlich verursachen sie unangenehme Gerüche und fördern durch ihren geringen Dampfdruck die Entzündungsgefahr.Aircraft exterior cleaners are known in the prior art which contain aqueous solutions of surfactants, organic solvents and inorganic substances are. The inorganic ingredients promote the abrasion of the dirt particles. However, these water-insoluble components often cause a matt film on the surface of the aircraft if the cleaner is not subsequently rinsed completely with clear water. The organic solvents are very harmful to aquatic organisms when disposing of the cleaners. In addition, they cause unpleasant smells and promote the risk of ignition due to their low vapor pressure.

Im Stand der Technik wurden Flugzeugreinigungsmittel zumeist mit schlecht abbaubaren und umweltgefährdenden Korrosionsinhibitoren, wie Natriumnitrat, Natriumnitrit oder Thioharnstoff formuliert.In the prior art, aircraft cleaning agents were mostly formulated with poorly degradable and environmentally hazardous corrosion inhibitors, such as sodium nitrate, sodium nitrite or thiourea.

US-3458 300 offenbart einen Reiniger, der Aluminiumoxidpartikel enthält, durch die Schmutz von Flugzeugoberflächen abgeschliffen werden soll. Antistatisch wirkende Tenside verhindern das erneute Absetzen der Schmutzpartikel auf der Außenhaut.US-3458 300 discloses a cleaner containing alumina particles by which dirt from aircraft surfaces is to be ground. Antistatic surfactants prevent the dirt particles from settling on the outer skin again.

US-3491 027 offenbart eine Reinigungslösung, die an Flugzeugen zur Anwendung kommt, die vorwiegend in Meeresnähe operieren. Das Mittel eignet sich zur Entfernung von Salzablagerungen von Flugzeugoberflächen.US-3491 027 discloses a cleaning solution that is used on aircraft that operate primarily near the sea. The agent is suitable for removing salt deposits from aircraft surfaces.

US-3948819 offenbart die synergistische Wirkung, die durch die Wahl von zwei nicht-ionischen Tensiden als Schmutzlöser erhalten wird. Es wird eine Methode zur Beurteilung der reinigenden Wirkung beschrieben.US-3948819 discloses the synergistic effect which is obtained by the choice of two non-ionic surfactants as dirt removers. A method for assessing the cleaning effect is described.

US-5496413 offenbart die Verbindung reinigender und wachsender Komponenten in einem einzigen Reiniger.US-5496413 discloses the connection of cleaning and growing components in a single cleaner.

US-5 516459 offenbart den Einsatz von Alkylaminoxiden in verdickten Flugzeugaußenreinigern, allerdings liegt der pH-Wert der Reiniger weit im alkalischen Bereich und benötigt umweltschädliche Alkalimetallnitrite zur Korrosionsinhibierung. US-5 880 078 offenbart, dass das erwünschte Schmutzlöseverhalten durch eine Kombination ethoxilierter Fettalkohole unterschiedlicher HLB-Werte erzielt werden kann.US Pat. No. 5,516,459 discloses the use of alkylamine oxides in thickened aircraft exterior cleaners, but the pH of the cleaners is far in the alkaline range and requires environmentally harmful alkali metal nitrites to inhibit corrosion. US Pat. No. 5,880,078 discloses that the desired soil release behavior can be achieved by a combination of ethoxylated fatty alcohols with different HLB values.

Aus dem Stand der Technik wird deutlich, dass man sich bei der Entwicklung von Flugzeugaußenreinigern bisher fast ausschließlich auf eine Verbesserung der reinigenden Wirkung konzentriert hat. Es wurde bislang nur wenig unternommen, Flugzeugaußenreiniger gleichzeitig mit umweltverträglicheren Korrosionsinhibitoren zu formulieren.It is clear from the prior art that the development of aircraft exterior cleaners has hitherto focused almost exclusively on improving the cleaning effect. So far, little has been done to formulate aircraft exterior cleaners simultaneously with more environmentally friendly corrosion inhibitors.

Die Aufgabe der Erfindung bestand somit darin, einen Flugzeugaußenreiniger zu entwickeln, der nicht nur effektiv Schmutz entfernt sondern zusätzlich umweltfreundliche Korrosionsinhibitoren enthält. Außerdem soll der Reiniger frei von Lösemitteln und anderen Substanzen sein, die bedingt durch ihren geringen Dampfdruck unangenehme Gerüche verursachen können, leicht entzündlich sind und darüber hinaus gesundheitsgefährdend sein können. Der Reiniger soll außer für Flugzeuge auch für andere Verkehrsmittel geeignet sein.The object of the invention was therefore to develop an aircraft exterior cleaner which not only effectively removes dirt but also contains environmentally friendly corrosion inhibitors. In addition, the cleaner should be free of solvents and other substances that can cause unpleasant smells due to their low vapor pressure, are highly flammable and can also be hazardous to health. The cleaner is said to be suitable for other means of transport in addition to aircraft.

Überraschenderweise wurde nun gefunden, dass Reinigungsmittel auf Basis von tertiären Aminoxiden und Polypeptiden als Korrosionsinhibitoren eine besonders gute Wirksamkeit aufweisen.Surprisingly, it has now been found that cleaning agents based on tertiary amine oxides and polypeptides are particularly effective as corrosion inhibitors.

Gegenstand der Erfindung ist somit die Verwendung einer Zusammensetzung zur Außenreinigung von Verkehrsmitteln, enthaltendThe invention thus relates to the use of a composition for cleaning the outside of vehicles, comprising

a) mindestens ein tertiäres Aminoxid der Formel R1R2R3NO, wobei R1 eine Alkyl-, Alkenyl-, Alkoxypropyl- odera) at least one tertiary amine oxide of the formula R 1 R 2 R 3 NO, where R 1 is an alkyl, alkenyl, alkoxypropyl or

Alkenylamidoalkylgruppe mit 8 bis 18 C-Atomen, R2 und R3 unabhängig voneinander niedermolekulare Alkylreste oder Hydroxyethyl- oder Hydroxypropylreste bedeuten, b) mindestens ein Alkalimetallsalz der Polyasparaginsaure mit einem Molekulargewicht von 5.000 g/mol bis 50.000 g/mol, oder der Polyglutaminsäure mit einem Molekulargewicht von 5.000 g/mol bis 50.000 g/mol, oder ein Gemisch beider Substanzen, wobei das Gewichtsverhältnis der Bestandteile a) : b) zwischen 10:1 und 3000:1 liegt.Alkenylamidoalkyl group with 8 to 18 carbon atoms, R 2 and R 3 independently of one another denote low molecular weight alkyl radicals or hydroxyethyl or hydroxypropyl radicals, b) at least one alkali metal salt of polyaspartic acid with a molecular weight of 5,000 g / mol to 50,000 g / mol, or of polyglutamic acid with a molecular weight of 5,000 g / mol to 50,000 g / mol, or a mixture of both substances, the weight ratio of the components a ): b) is between 10: 1 and 3000: 1.

Gewichtsprozente sind im folgenden jeweils bezogen auf das Gewicht der Zusammensetzung. In einer bevorzugten Ausführungsform enthält die Zusammensetzung 10 bis 30 Gew.-% des Bestandteils a), 0,01 bis 1 Gew.-% des Bestandteils b) und Wasser ad 100 Gew.-%. Das bevorzugte Gewichtsverhältnis zwischen den Bestandteilen a) und b) liegt zwischen 15:1 und 2500:1.Percentages by weight are in each case based on the weight of the composition. In a preferred embodiment, the composition contains 10 to 30% by weight of component a), 0.01 to 1% by weight of component b) and water ad 100% by weight. The preferred weight ratio between components a) and b) is between 15: 1 and 2500: 1.

Ein bevorzugter Gegenstand der Erfindung ist die Verwendung der erfindungsgemäßen Zusammensetzung als Außenreinigungsmittel für Flugzeuge.A preferred object of the invention is the use of the composition according to the invention as an external cleaning agent for aircraft.

Ein weiterer Gegenstand der Erfindung ist ein Verfahren zur Außenreinigung von Verkehrsmitteln, insbesondere von Flugzeugen, indem man die erfindungsgemäße Zusammensetzung auf die Außenhaut des zu reinigenden Verkehrsmittels aufbringt.Another object of the invention is a method for cleaning the outside of means of transport, in particular aircraft, by applying the composition according to the invention to the outer skin of the means of transport to be cleaned.

Der Bestandteil a) der erfindungsgemäßen Zusammensetzung macht vorzugsweise 15 bis 25 Gew.-% des Gesamtgewichts aus. Ri steht vorzugsweise für eine Alkyl-, Alkenyl-, Alkoxypropyl- oder Alkenylamidoalkylgruppe mit 10 bis 16 C-Atomen. R2 und R3 stehen vorzugsweise für Alkylreste mit 1 bis 6, insbesondere 1 bis 4 C-Atomen oder können auch Hydroxyethyl- oderThe component a) of the composition according to the invention preferably makes up 15 to 25% by weight of the total weight. Ri preferably represents an alkyl, alkenyl, alkoxypropyl or alkenylamidoalkyl group with 10 to 16 carbon atoms. R 2 and R 3 are preferably alkyl radicals having 1 to 6, in particular 1 to 4, carbon atoms or can also be hydroxyethyl or

Hydroxypropylreste bedeuten. Als Beispiele für Bestandteil a) seien genannt: Cocosalkyldimethylaminoxid, Stearyldimethylaminoxid, Lauryldimethylaminoxid und Ci4-Alkyldimethylaminoxid. Die Komponente a) kann auch eine Mischung aus den genannten Aminoxiden sein.Hydroxypropyl radicals mean. Examples of component a) are: cocoalkyldimethylamine oxide, stearyldimethylamine oxide, lauryldimethylamine oxide and Ci 4 -alkyldimethylamine oxide. Component a) can also be a mixture of the amine oxides mentioned.

Der Bestandteil b) ist ein Alkalimetallsalz der Polyasparaginsaure oder der Polyglutaminsäure mit einem Molekulargewicht von vorzugsweise 7.000 g/mol bis 20.000 g/mol, oder einer Mischung beider Substanzen. Es handelt sich dabei um gut abbaubare, nicht-toxische und wasserlösliche Biopolymere, hier speziell um Polypeptide. Bisher werden diese Verbindungen vorwiegend als Dispergiermittel in Kühlwasser und zur Entfernung von Kalkablagerungen eingesetzt. Es hat sich gezeigt, dass diese Substanzen ebenso hervorragend als Korrosionsinhibitor für den Einsatz in Flugzeugaußenreinigern geeignet sind. Zusätzlich können in den Reinigern Entschäumer, Farbstoffe, Komplexierungsmittel und Antioxidantien enthalten sein.The component b) is an alkali metal salt of polyaspartic acid or polyglutamic acid with a molecular weight of preferably 7,000 g / mol to 20,000 g / mol, or a mixture of both substances. These are easily degradable, non-toxic and water-soluble biopolymers, especially polypeptides. So far, these compounds have mainly been used as dispersants in cooling water and for removing limescale. It has been shown that these substances are also outstandingly suitable as corrosion inhibitors for use in aircraft exterior cleaners. Defoamers, dyes, complexing agents and antioxidants can also be contained in the cleaners.

Der pH-Wert von Flugzeugaußenreinigern soll im allgemeinen 6,5 bis 11 , vorzugsweise 9 bis 10 betragen. Sofern die erfindungsgemäße Zusammensetzung einen solchen pH-Wert nicht aufweist, kann er durch geeignete pH-Regulatoren eingestellt werden. Dafür geeignete basische Verbindungen sind solche aus der Gruppe der Alkalimetallhydroxide, wie NaOH und KOH.The pH of aircraft exterior cleaners should generally be 6.5 to 11, preferably 9 to 10. If the composition according to the invention does not have such a pH value, it can be adjusted by means of suitable pH regulators. Suitable basic compounds for this purpose are those from the group of alkali metal hydroxides, such as NaOH and KOH.

Die Herstellung der erfindungsgemäßen Zusammensetzung erfolgt durch Mischen der einzelnen Bestandteile in beliebiger Reihenfolge, was zum Beispiel in einem mit Rührer ausgestatteten Behälter vorgenommen werden kann.The composition according to the invention is produced by mixing the individual components in any order, which can be done, for example, in a container equipped with a stirrer.

Die resultierenden Formulierungen zeigen eine hervorragende Schmutzlösekraft. Praxistests an Kraftfahrzeugen haben gezeigt, dass sich damit sogar hartnäckige Insektenverunreinigungen auf Windschutzscheiben leicht entfernen lassen. Das Mittel hinterlässt keine Schlieren, enthält keine organischen Lösemittel und enthält nur umweltfreundliche und leicht abbaubare Korrosionsinhibitoren.The resulting formulations show an excellent dirt dissolving power. Practical tests on motor vehicles have shown that even stubborn insect contamination on windshields can be easily removed. The agent leaves no streaks, contains no organic solvents and only contains environmentally friendly and easily degradable corrosion inhibitors.

Leichter Schmutz lässt sich bereits mit einer Verdünnung Reiniger : Wasser = 1:15 problemlos entfernen. Bei hartnäckigem Schmutz wird eine Verdünnung von 1 :5 empfohlen.Light dirt can already be removed with a dilution of cleaner: water = 1:15. A dilution of 1: 5 is recommended for stubborn dirt.

Die Erfindung wird nun durch Beispiele erläutert. BeispieleThe invention will now be illustrated by examples. Examples

Eine Beurteilung der Reinigungswirkung erfolgt durch Schmutzlösetests. Dazu wird ein 2024-T3-Aluminiumblech der Größe 5 x 2 cm und einer Stärke von 1 mm verwendet. Das Aluminiumblech wird vor Versuchsbeginn erst mit einer verdünnten Natronlaugelösung und anschließend mit einer verdünnten Salpetersäurelösung angeätzt. Dadurch wird die Oberfläche aufgeraut, so dass sich Schmutzpartikel besser auf dem Blech festsetzen können. Das Blech wird abwechselnd mit unterschiedlichen Verunreinigungen versehen. Dazu zählen Gleitlagerfett, Vaseline und künstlich erzeugter Flugzeugschmutz.The cleaning effect is assessed by dirt dissolving tests. A 2024-T3 aluminum sheet measuring 5 x 2 cm and 1 mm thick is used for this. Before starting the experiment, the aluminum sheet is first etched with a dilute sodium hydroxide solution and then with a dilute nitric acid solution. This roughenes the surface so that dirt particles can stick to the sheet better. The sheet is alternately provided with different impurities. These include plain bearing grease, petroleum jelly and artificially generated aircraft dirt.

100 g dieses künstlichen Flugzeugschmutzes bestehen aus 1 g Lanolin, 20 g Aktivkohle, 10 g Talkum, 15 g Schmieröl und 54 g Kerosin. Die Komponenten werden innig miteinander vermischt und in einem dünnen Film auf das Aluminiumblech aufgetragen. Anschließend wird der Schmutz 12 Stunden lang bei 100°C in einem Trockenschrank in das Aluminiumblech eingebrannt.100 g of this artificial aircraft dirt consists of 1 g lanolin, 20 g activated carbon, 10 g talc, 15 g lubricating oil and 54 g kerosene. The components are intimately mixed together and applied to the aluminum sheet in a thin film. The dirt is then burned into the aluminum sheet in a drying cabinet at 100 ° C for 12 hours.

Zur Beurteilung der Schmutzlösekraft wird das mit Gleitlagerfett, Vaseline oder künstlichem Flugzeugschmutz versehene Aluminiumblech in eine Lösung von 100 ml Reinigungsmittel eingetaucht. Die Lösung befindet sich einem Becherglas in dem sich ein Magnetrührer mit 500 Umdrehungen pro Minute dreht. Nach regelmäßigen Abständen erfolgt eine Beurteilung der abgelösten Schmutzkomponenten.To assess the dirt-dissolving power, the aluminum plate provided with plain bearing grease, petroleum jelly or artificial aircraft dirt is immersed in a solution of 100 ml cleaning agent. The solution is a beaker in which a magnetic stirrer rotates at 500 revolutions per minute. The detached dirt components are assessed at regular intervals.

Beispiel 1example 1

Es wird ein erfindungsgemäßes Flugzeugreinigungsmittel durch Mischen der folgenden Komponenten hergestellt (Konzentrat):An aircraft cleaning agent according to the invention is produced by mixing the following components (concentrate):

15,00 Gew.-% Cι2/Ci4-Alkyldimethylaminoxid 0,20 Gew.-% Alkalimetall-Polyaspartat mit 15.000 g/mol15.00 wt .-% Cι 2 / Ci4-alkyl dimethyl amine oxide 0.20 wt .-% alkali metal polyaspartate 15,000 g / mol

0,45 Gew.-% Natronlauge0.45% by weight sodium hydroxide solution

84,35 Gew.-% Wasser. Die Schmutzlösekraft dieses Reinigungsmittels wird anhand der oben beschriebenen Methode untersucht. Bereits innerhalb weniger Minuten werden sowohl von dem Konzentrat, als auch den 1:1- und 1:2-Verdünnungen mit Wasser die Verunreinigungen Gleitlagerfett, Vaseline und künstlich erzeugter Flugzeugschmutz komplett von den Aluminiumplatten abgelöst.84.35 wt% water. The dirt dissolving power of this cleaning agent is examined using the method described above. Within just a few minutes, both the concentrate and the 1: 1 and 1: 2 dilutions with water completely remove the contaminants plain bearing grease, petroleum jelly and artificially generated aircraft dirt from the aluminum plates.

Weitere Untersuchungen des unter Beispiel 1 beschriebenen Flugzeugreinigungsmittels ergeben, dass alle weiteren Anforderungen der SAE- Spezifikation AMS 1526 erfüllt werden. Das Mittel verursacht keine Korrosion an Aluminium-, Magnesium- und Stahllegierungen und beeinträchtigt weder Acrylglas, noch lackierte und unlackierte Flugzeugoberflächen.Further investigations of the aircraft cleaning agent described under Example 1 show that all further requirements of the SAE specification AMS 1526 are met. The agent does not cause corrosion on aluminum, magnesium and steel alloys and does not affect acrylic glass, nor painted and unpainted aircraft surfaces.

Beispiel 2Example 2

Es wird ein erfindungsgemäßes Flugzeugreinigungsmittel durch Mischen der folgenden Komponenten hergestellt (Konzentrat):An aircraft cleaning agent according to the invention is produced by mixing the following components (concentrate):

25,00 Gew.-% Lauryldimethylaminoxid25.00% by weight lauryldimethylamine oxide

0,20 Gew.-% Alkalimetall-Polyglutamat mit 35.000 g/mol0.20% by weight of alkali metal polyglutamate at 35,000 g / mol

0,40 Gew.-% Kalilauge 74,4 Gew.-% Wasser.0.40% by weight potassium hydroxide solution 74.4% by weight water.

Dieses Reinigungsmittel löst ebenfalls alle Verunreinigungen ab und erfüllt die Anforderungen der SAE-Spezifikation AMS 1526.This cleaning agent also removes all impurities and meets the requirements of the SAE specification AMS 1526.

Beispiel 3Example 3

Es wird ein erfindungsgemäßes Flugzeugreinigungsmittel durch Mischen der folgenden Komponenten hergestellt (Konzentrat):An aircraft cleaning agent according to the invention is produced by mixing the following components (concentrate):

20,00 Gew.-% Cocosalkyldimethylaminoxid 0,20 Gew.-% Alkalimetall-Polyaspartat mit 10.000 g/mol20.00% by weight cocoalkyldimethylamine oxide 0.20% by weight alkali metal polyaspartate at 10,000 g / mol

0,35 Gew.-% Natronlauge0.35% by weight sodium hydroxide solution

79,45 Gew.-% Wasser. Dieses Reinigungsmittel löst ebenfalls alle Verunreinigungen ab und erfüllt die Anforderungen der SAE-Spezifikation AMS 1526. 79.45 wt% water. This cleaning agent also removes all impurities and meets the requirements of the SAE specification AMS 1526.

Claims

Patentansprüche claims 1. Verwendung einer Zusammensetzung zur Außenreinigung von Verkehrsmitteln, enthaltend a) mindestens ein tertiäres Aminoxid der Formel R1R R3NO, wobei Ri eine Alkyl-, Alkenyl-, Alkoxypropyl- oder1. Use of a composition for the external cleaning of means of transport, comprising a) at least one tertiary amine oxide of the formula R 1 RR 3 NO, where R 1 is an alkyl, alkenyl, alkoxypropyl or Alkenylamidoalkylgruppe mit 8 bis 18 C-Atomen, R2 und R3 unabhängig voneinander niedermolekulare Alkylreste oder Hydroxyethyl- oder Hydroxypropylreste bedeuten, b) mindestens ein Alkalimetallsalz der Polyasparaginsaure mit einem Molekulargewicht von 5.000 g/mol bis 50.000 g/mol, oder der Polyglutaminsäure mit einem Molekulargewicht von 5.000 g/mol bis 50.000 g/mol, oder ein Gemisch beider Substanzen, wobei das Gewichtsverhältnis der Bestandteile a) : b) zwischen 10:1 und 3000:1 liegt.Alkenylamidoalkyl group with 8 to 18 carbon atoms, R2 and R 3 independently of one another denote low molecular weight alkyl radicals or hydroxyethyl or hydroxypropyl radicals, b) at least one alkali metal salt of polyaspartic acid with a molecular weight of 5,000 g / mol to 50,000 g / mol, or of polyglutamic acid with one Molecular weight of 5,000 g / mol to 50,000 g / mol, or a mixture of both substances, the weight ratio of the components a): b) being between 10: 1 and 3000: 1. 2. Verwendung einer Zusammensetzung gemäß Anspruch 1 , worin R1 für eine Alkyl-, Alkenyl-, Alkoxypropyl- oder Alkenylamidogruppe mit 10 bis 16 C-Atomen steht.2. Use of a composition according to claim 1, wherein R 1 represents an alkyl, alkenyl, alkoxypropyl or alkenylamido group having 10 to 16 carbon atoms. 3. Verwendung einer Zusammensetzung gemäß Anspruch 1 und/oder 2, worin R2 und R3 unabhängig voneinander für Alkylreste von 1 bis 6 C-Atomen oder Hydroxyethyl- oder Hydroxypropylreste stehen.3. Use of a composition according to claim 1 and / or 2, wherein R 2 and R 3 independently of one another represent alkyl radicals of 1 to 6 carbon atoms or hydroxyethyl or hydroxypropyl radicals. 4. Verwendung einer Zusammensetzung gemäß einem oder mehreren der Ansprüche 1 bis 3, worin Bestandteil b) ein Molekulargewicht von 7000 bis4. Use of a composition according to one or more of claims 1 to 3, wherein component b) has a molecular weight of 7000 to 20.000 g/mol aufweist.Has 20,000 g / mol. 5. Verwendung einer Zusammensetzung gemäß einem oder mehreren der Ansprüche 1 bis 4, worin zusätzlich Entschäumer, Farbstoffe, Komplexierungsmittel oder Antioxidantien enthalten sind. 5. Use of a composition according to one or more of claims 1 to 4, which additionally contains defoamers, dyes, complexing agents or antioxidants. 6. Verwendung einer Zusammensetzung gemäß einem oder mehreren der Ansprüche 1 bis 5 zur Reinigung von Flugzeugen. 6. Use of a composition according to one or more of claims 1 to 5 for cleaning aircraft.
EP02806022A 2002-01-11 2002-12-18 Cleaning agents for the outer surfaces of means of transport Expired - Lifetime EP1468065B1 (en)

Applications Claiming Priority (3)

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DE10200727 2002-01-11
DE10200727A DE10200727C1 (en) 2002-01-11 2002-01-11 External cleaner for means of transport, e.g. car, lorry, train, tram and especially aircraft, contains tertiary amine oxide and alkali metal polyaspartate and/or polyglutamate
PCT/EP2002/014444 WO2003057812A1 (en) 2002-01-11 2002-12-18 Cleaning agents for the outer surfaces of means of transport

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CA2473037A1 (en) 2003-07-17
CN1239689C (en) 2006-02-01
WO2003057812A1 (en) 2003-07-17
ATE340236T1 (en) 2006-10-15
RU2004124382A (en) 2006-01-27
DK1468065T3 (en) 2006-12-11
US7053031B2 (en) 2006-05-30
CN1596298A (en) 2005-03-16
DE50208221D1 (en) 2006-11-02
DE10200727C1 (en) 2003-06-12
JP2005514493A (en) 2005-05-19
EP1468065B1 (en) 2006-09-20
NO20043326L (en) 2004-08-10

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