EP1468065B1 - Cleaning agents for the outer surfaces of means of transport - Google Patents

Cleaning agents for the outer surfaces of means of transport Download PDF

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Publication number
EP1468065B1
EP1468065B1 EP02806022A EP02806022A EP1468065B1 EP 1468065 B1 EP1468065 B1 EP 1468065B1 EP 02806022 A EP02806022 A EP 02806022A EP 02806022 A EP02806022 A EP 02806022A EP 1468065 B1 EP1468065 B1 EP 1468065B1
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Prior art keywords
mol
aircraft
composition
molecular weight
weight
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EP02806022A
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German (de)
French (fr)
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EP1468065A1 (en
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Ingo Jeschke
Achim Stankowiak
Wolfgang Huber
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Clariant Produkte Deutschland GmbH
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Clariant Produkte Deutschland GmbH
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    • 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 contaminants from outdoor vehicle surfaces containing amine oxides and polypeptides.
  • Aircraft Exterior Cleaners are not only for cleaning dirty aircraft, but are also essential for the economical operation of aircraft. Airplane aluminum surfaces are permanently contaminated with aviation gasoline, carbon fumes and lubricants during flight operations. Due to the dirt, the surface roughness increases, so that the necessary for the buoyancy air flow is slightly turbulent. As a result, more driving force and thus more fuel is needed to keep the aircraft at the desired cruising speed. Impurities can also cause corrosion of the aluminum components, which can lead to a significant impairment of flight safety.
  • Aircraft exterior cleaners must 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) corrosion effect, hydrogen embrittlement, material compatibility and the stability of the cleaning agent are examined.
  • SAE Specification AMS Alospace Material Standards 1526 (Cleaner for aircraft exterior surfaces, water-miscible, pressure-spraying type) corrosion effect, hydrogen embrittlement, material compatibility and the stability of the cleaning agent are examined.
  • US 3,458,300 discloses a cleaner containing alumina particles intended to abrade soil from aircraft surfaces. Antistatic surfactants prevent the redeposition of dirt particles on the outer skin.
  • US 3 491 027 discloses a cleaning solution used on aircraft operating predominantly near the sea.
  • the agent is suitable for removing salt deposits from aircraft surfaces.
  • U.S. 3,948,819 discloses the synergistic effect obtained by the choice of two nonionic surfactants as soil release agents. A method for evaluating the cleaning effect is described.
  • US-5 496 413 discloses the combination of cleansing and growing components in a single cleaner.
  • US 5,516,459 discloses the use of alkylamine oxides in thickened aircraft exterior cleaners, however, the pH of the cleaners is well within the alkaline range and requires environmentally harmful alkali metal nitrites for corrosion inhibition.
  • U.S. 5,992,669 discloses a hard surface cleaner comprising an aqueous solution comprising 40 to 50% of a nonionic surfactant mixture of an alcohol ethoxylate and a C 8 to C 15 alkyldimethylamine oxide in a weight ratio of (5 to 15): 1 and 50 to Contains 60% of a nitrogen-containing builder.
  • U.S. 5,443,651 discloses a ferrous metal surface cleaner containing amino acids such as polyaspartic acid or aspartic acid / glutamic acid copolymers at most pH 7.
  • JP-57-128 797 discloses a vehicle cleaner containing a C 8 to C 22 amine oxide, a fatty alcohol alkoxylate, an alkaline builder and water.
  • US 5,880,078 discloses that the desired soil release behavior can be achieved by a combination of ethoxylated fatty alcohols of different HLB values.
  • the object of the invention was therefore to develop an aircraft exterior cleaner, which not only effectively removes dirt but additionally contains environmentally friendly corrosion inhibitors.
  • the cleaner should be free from solvents and other substances that can cause unpleasant odors due to their low vapor pressure, are easily flammable and beyond health can be.
  • the cleaner should be suitable for other means of transport except for aircraft.
  • Weight percentages are hereinafter based on the weight of the composition.
  • the composition contains 10 to 30 wt .-% of component a), 0.01 to 1 wt .-% of component b) and water ad 100 wt .-%.
  • the preferred weight ratio between components a) and b) is between 15: 1 and 2500: 1.
  • a preferred subject of the invention is the use of the composition according to the invention as exterior cleaner for aircraft.
  • Another object of the invention is a method for the exterior cleaning of means of transport, in particular of aircraft, by applying the composition of the invention to the outer skin of the means of transport to be cleaned.
  • the constituent a) of the composition according to the invention preferably accounts for 15 to 25 wt .-% of the total weight.
  • R 1 is preferably an alkyl, alkenyl, alkoxypropyl or alkenylamidoalkyl group having 10 to 16 carbon atoms.
  • R 2 and R 3 are preferably alkyl radicals having 1 to 6, in particular 1 to 4 C-atoms or may also mean hydroxyethyl or hydroxypropyl radicals.
  • Examples of constituent a) are: cocoalkyldimethylamine oxide, stearyldimethylamine oxide, lauryldimethylamine oxide and C 14 -alkyldimethylamine oxide.
  • Component a) may also be a mixture of the abovementioned amine oxides.
  • Component b) is an alkali metal salt of polyaspartic acid or polyglutamic acid having a molecular weight of preferably 7,000 g / mol to 20,000 g / mol, or a mixture of both substances.
  • These are readily degradable, non-toxic and water-soluble biopolymers, in particular polypeptides. So far, these compounds are mainly used as a dispersant in cooling water and for the removal of limescale. It has been shown that these substances are just as well suited as a corrosion inhibitor for use in aircraft exterior cleaners.
  • defoamers, dyes, complexing agents and antioxidants may be included 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, it can be adjusted by means of suitable pH regulators.
  • suitable basic compounds are those from the group of alkali metal hydroxides, such as NaOH and KOH.
  • composition of the invention is carried out by mixing the individual components in any order, which can be carried out for example in a container equipped with a stirrer.
  • the resulting formulations show excellent soil release power. Practical tests on motor vehicles have shown that even stubborn insect contamination on windscreens can be easily removed. The product leaves no streaks, contains no organic solvents and contains only environmentally friendly and easily degradable corrosion inhibitors.
  • 100 g of this artificial aircraft dirt consist of 1 g of lanolin, 20 g of activated carbon, 10 g of talc, 15 g of lubricating oil and 54 g of kerosene.
  • the components are intimately mixed and applied to the aluminum sheet in a thin film.
  • the dirt is then baked for 12 hours at 100 ° C in a drying oven in the aluminum sheet.
  • the aluminum sheet provided with plain bearing grease, vaseline or artificial aircraft soil is immersed in a solution of 100 ml of detergent.
  • the solution is in a beaker in which a magnetic stirrer rotates at 500 revolutions per minute. After regular intervals, an assessment of the detached dirt components is carried out.
  • An aircraft cleaning agent according to the invention is prepared by mixing the following components (concentrate): 15.00% by weight C 12 / C 14 alkyldimethylamine oxide 0.20% by weight Alkali metal polyaspartate at 15,000 g / mol 0.45% by weight caustic soda 84.35% by weight Water.
  • Example 1 Further investigations of the aircraft cleaning agent described in Example 1 show that all further requirements of the SAE specification AMS 1526 are met.
  • the product does not cause corrosion on aluminum, magnesium and steel alloys and does not affect acrylic glass, painted or unpainted aircraft surfaces.
  • An aircraft cleaning agent according to the invention is prepared by mixing the following components (concentrate): 25.00% by weight lauryl dimethyl 0.20% by weight Alkali metal polyglutamate at 35,000 g / mol 0.40% by weight potassium hydroxide 74.4% by weight Water.
  • 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 prepared by mixing the following components (concentrate): 20.00% by weight Cocosalkyldimethylaminoxid 0.20% by weight Alkali metal polyaspartate at 10,000 g / mol 0.35% by weight caustic soda 79.45% by weight Water.
  • 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)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

External cleaner for transport means contains: (1) tertiary amine oxide(s) (I) with one 8-18 carbon (C) alk(en)yl, alkoxypropyl or alkenylamidoalkyl group and 2 groups selected from lower alkyl, hydroxyethyl and hydroxypropyl; and (2) alkali metal salt(s) (II) of polyaspartic and/or polyglutamic acid of molecular weight 5000-50000 in a (I):(II) weight ratio of (10-3000):1. External cleaner for means of transport contains: (1) tertiary amine oxide(s) of formula (I); and (2) alkali metal salt(s) (II) of polyaspartic and/or polyglutamic acid of molecular weight 5000-50000, in a (I):(II) weight ratio of (10-3000):1. R1R2R3NO (I) R1 = 8-18 carbon (C) alk(en)yl, alkoxypropyl or alkenylamidoalkyl; and R2, R3 = lower alkyl, hydroxyethyl or hydroxypropyl.

Description

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 contaminants from outdoor vehicle surfaces 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 aircraft, there are regularly strong, difficult to remove soils. 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 Obertlächenrauheit 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 for cleaning dirty aircraft, but are also essential for the economical operation of aircraft. Airplane aluminum surfaces are permanently contaminated with aviation gasoline, carbon fumes and lubricants during flight operations. Due to the dirt, the surface roughness increases, so that the necessary for the buoyancy air flow is slightly turbulent. As a result, more driving force and thus more fuel is needed to keep the aircraft at the desired cruising speed. Impurities can also cause corrosion of the aluminum components, which can lead to a significant 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 must 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) corrosion effect, 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.In the prior art aircraft exterior cleaners are known which aqueous solutions of surfactants, organic solvents and inorganic substances are. The inorganic ingredients promote the abrasion of dirt particles. However, these water-insoluble ingredients often cause a matte film on the aircraft surface if the cleaner is not subsequently rinsed completely with clean water. The organic solvents are very harmful to aquatic organisms when disposing of the cleaners. In addition, they cause unpleasant odors 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 cleaners have been formulated mostly with poorly degradable and environmentally hazardous corrosion inhibitors, such as sodium nitrate, sodium nitrite or thiourea.

US-3 458 300 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 3,458,300 discloses a cleaner containing alumina particles intended to abrade soil from aircraft surfaces. Antistatic surfactants prevent the redeposition of dirt particles on the outer skin.

US-3 491 027 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 3 491 027 discloses a cleaning solution used on aircraft operating predominantly near the sea. The agent is suitable for removing salt deposits from aircraft surfaces.

US-3 948 819 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.U.S. 3,948,819 discloses the synergistic effect obtained by the choice of two nonionic surfactants as soil release agents. A method for evaluating the cleaning effect is described.

US-5 496 413 offenbart die Verbindung reinigender und wachsender Komponenten in einem einzigen Reiniger.US-5 496 413 discloses the combination of cleansing and growing components in a single cleaner.

US-5 516 459 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 5,516,459 discloses the use of alkylamine oxides in thickened aircraft exterior cleaners, however, the pH of the cleaners is well within the alkaline range and requires environmentally harmful alkali metal nitrites for corrosion inhibition.

US-5 992 669 offenbart einen Reiniger für harte Oberflächen, welcher eine wässrige Lösung mit 40 bis 50 % einer nichtionischen Tensidmischung aus einem Alkoholethoxylat und einem C8- bis C15-Alkyldimethylaminoxid im Gewichtsverhältnis von (5 bis 15) : 1 und 50 bis 60 % eines stickstoffhaltigen Builders enthält.U.S. 5,992,669 discloses a hard surface cleaner comprising an aqueous solution comprising 40 to 50% of a nonionic surfactant mixture of an alcohol ethoxylate and a C 8 to C 15 alkyldimethylamine oxide in a weight ratio of (5 to 15): 1 and 50 to Contains 60% of a nitrogen-containing builder.

US-5 443 651 offenbart einen Reiniger für Eisenmetalloberflächen, der Aminosäuren wie Polyaspartamsäure oder Aspartamsäure/Glutaminsäure-Copolymere bei höchstens pH 7 enthält.U.S. 5,443,651 discloses a ferrous metal surface cleaner containing amino acids such as polyaspartic acid or aspartic acid / glutamic acid copolymers at most pH 7.

JP-57-128 797 offenbart einen Reiniger für Kraftfahrzeuge, welcher ein C8- bis C22-Aminoxid, ein Fettalkoholalkoxylat, eine alkalischen Builder und Wasser enthält.JP-57-128 797 discloses a vehicle cleaner containing a C 8 to C 22 amine oxide, a fatty alcohol alkoxylate, an alkaline builder and water.

US-5 880 078 offenbart, dass das erwünschte Schmutzlöseverhalten durch eine Kombination ethoxilierter Fettalkohole unterschiedlicher HLB-Werte erzielt werden kann.US 5,880,078 discloses that the desired soil release behavior can be achieved by a combination of ethoxylated fatty alcohols of 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 concentrated almost exclusively on improving the cleaning effect. So far, little has been done to formulate aircraft exterior cleaners simultaneously with more environmentally benign 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 additionally contains environmentally friendly corrosion inhibitors. In addition, the cleaner should be free from solvents and other substances that can cause unpleasant odors due to their low vapor pressure, are easily flammable and beyond health can be. The cleaner should be suitable for other means of transport except for 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 detergents based on tertiary amine oxides and polypeptides have a particularly good activity as corrosion inhibitors.

Gegenstand der Erfindung ist somit die Verwendung einer Zusammensetzung zur Außenreinigung von Verkehrsmitteln, enthaltend

  • a) mindestens ein tertiäres Aminoxid der Formel R1R2R3NO, wobei
    R1
    eine Alkyl-, Alkenyl-, Alkoxypropyl- oder Alkenylamidoalkylgruppe mit 8 bis 18 C-Atomen,
    R2 und R3
    unabhängig voneinander niedermolekulare Alkylreste oder Hydroxyethyl- oder Hydroxypropylreste bedeuten,
  • b) mindestens ein Alkalimetallsalz der Polyasparaginsäure 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.
The invention thus relates to the use of a composition for the external cleaning of vehicles, containing
  • a) at least one tertiary amine oxide of the formula R 1 R 2 R 3 NO, wherein
    R 1
    an alkyl, alkenyl, alkoxypropyl or alkenylamidoalkyl group having 8 to 18 C atoms,
    R 2 and R 3
    independently of one another are low molecular weight alkyl radicals or hydroxyethyl or hydroxypropyl radicals,
  • b) at least one alkali metal salt of polyaspartic acid having a molecular weight of 5,000 g / mol to 50,000 g / mol, or the polyglutamic acid having a molecular weight of 5,000 g / mol to 50,000 g / mol, or a mixture of both substances, wherein 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.Weight percentages are hereinafter based on the weight of the composition. In a preferred embodiment, the composition contains 10 to 30 wt .-% of component a), 0.01 to 1 wt .-% of component b) and water ad 100 wt .-%. 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 subject of the invention is the use of the composition according to the invention as exterior cleaner 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 the exterior cleaning of means of transport, in particular of aircraft, by applying the composition of 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. R1 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- oder Hydroxypropylreste bedeuten. Als Beispiele für Bestandteil a) seien genannt: Cocosalkyldimethylaminoxid, Stearyldimethylaminoxid, Lauryldimethylaminoxid und C14-Alkyldimethylaminoxid. Die Komponente a) kann auch eine Mischung aus den genannten Aminoxiden sein.The constituent a) of the composition according to the invention preferably accounts for 15 to 25 wt .-% of the total weight. R 1 is preferably an alkyl, alkenyl, alkoxypropyl or alkenylamidoalkyl group having 10 to 16 carbon atoms. R 2 and R 3 are preferably alkyl radicals having 1 to 6, in particular 1 to 4 C-atoms or may also mean hydroxyethyl or hydroxypropyl radicals. Examples of constituent a) are: cocoalkyldimethylamine oxide, stearyldimethylamine oxide, lauryldimethylamine oxide and C 14 -alkyldimethylamine oxide. Component a) may also be a mixture of the abovementioned amine oxides.

Der Bestandteil b) ist ein Alkalimetallsalz der Polyasparaginsäure 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.Component b) is an alkali metal salt of polyaspartic acid or polyglutamic acid having a molecular weight of preferably 7,000 g / mol to 20,000 g / mol, or a mixture of both substances. These are readily degradable, non-toxic and water-soluble biopolymers, in particular polypeptides. So far, these compounds are mainly used as a dispersant in cooling water and for the removal of limescale. It has been shown that these substances are just as well suited as a corrosion inhibitor for use in aircraft exterior cleaners.
In addition, defoamers, dyes, complexing agents and antioxidants may be included 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, it can be adjusted by means of suitable pH regulators. For this purpose suitable basic compounds 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 preparation of the composition of the invention is carried out by mixing the individual components in any order, which can be carried out 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 excellent soil release power. Practical tests on motor vehicles have shown that even stubborn insect contamination on windscreens can be easily removed. The product leaves no streaks, contains no organic solvents and contains only 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 be easily removed with a dilution cleaner: water = 1:15. For stubborn dirt, a dilution of 1: 5 is recommended.

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

BeispieleExamples

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.An assessment of the cleaning effect is carried out by soil release tests. For this purpose, a 2024-T3 aluminum sheet of size 5 x 2 cm and a thickness of 1 mm is used. The aluminum sheet is etched before the start of the experiment with a dilute sodium hydroxide solution and then with a dilute nitric acid solution. As a result, the surface is roughened, so that dirt particles can better settle on the sheet. The sheet is alternately provided with different impurities. These include plain bearing grease, vaseline 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 consist of 1 g of lanolin, 20 g of activated carbon, 10 g of talc, 15 g of lubricating oil and 54 g of kerosene. The components are intimately mixed and applied to the aluminum sheet in a thin film. The dirt is then baked for 12 hours at 100 ° C in a drying oven in the aluminum sheet.

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 soil release force, the aluminum sheet provided with plain bearing grease, vaseline or artificial aircraft soil is immersed in a solution of 100 ml of detergent. The solution is in a beaker in which a magnetic stirrer rotates at 500 revolutions per minute. After regular intervals, an assessment of the detached dirt components is carried out.

Beispiel 1example 1

Es wird ein erfindungsgemäßes Flugzeugreinigungsmittel durch Mischen der folgenden Komponenten hergestellt (Konzentrat): 15,00 Gew.-% C12/C14-Alkyldimethylaminoxid 0,20 Gew.-% Alkalimetall-Polyaspartat mit 15.000 g/mol 0,45 Gew.-% Natronlauge 84,35 Gew.-% Wasser. An aircraft cleaning agent according to the invention is prepared by mixing the following components (concentrate): 15.00% by weight C 12 / C 14 alkyldimethylamine oxide 0.20% by weight Alkali metal polyaspartate at 15,000 g / mol 0.45% by weight caustic soda 84.35% by weight Water.

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.The soil release power of this cleaning agent is investigated by the method described above. Already within a few minutes, the contaminants plain bearing grease, vaseline and artificially generated aircraft dirt are completely removed from the aluminum plates both from the concentrate and from the 1: 1 and 1: 2 dilutions with water.

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 in Example 1 show that all further requirements of the SAE specification AMS 1526 are met. The product does not cause corrosion on aluminum, magnesium and steel alloys and does not affect acrylic glass, painted or unpainted aircraft surfaces.

Beispiel 2Example 2

Es wird ein erfindungsgemäßes Flugzeugreinigungsmittel durch Mischen der folgenden Komponenten hergestellt (Konzentrat): 25,00 Gew.-% Lauryldimethylaminoxid 0,20 Gew.-% Alkalimetall-Polyglutamat mit 35.000 g/mol 0,40 Gew.-% Kalilauge 74,4 Gew.-% Wasser. An aircraft cleaning agent according to the invention is prepared by mixing the following components (concentrate): 25.00% by weight lauryl dimethyl 0.20% by weight Alkali metal polyglutamate at 35,000 g / mol 0.40% by weight potassium hydroxide 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): 20,00 Gew.-% Cocosalkyldimethylaminoxid 0,20 Gew.-% Alkalimetall-Polyaspartat mit 10.000 g/mol 0,35 Gew.-% Natronlauge 79,45 Gew.-% Wasser. An aircraft cleaning agent according to the invention is prepared by mixing the following components (concentrate): 20.00% by weight Cocosalkyldimethylaminoxid 0.20% by weight Alkali metal polyaspartate at 10,000 g / mol 0.35% by weight caustic soda 79.45% 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.

Claims (5)

  1. The use of a composition for the exterior cleaning of means of transport, comprising
    a) at least one tertiary amine oxide of the formula R1R2R3NO, where
    R1 is an alkyl, alkenyl, alkoxypropyl or alkenylamidoalkyl group having 8 to 18 carbon atoms,
    R2 and R3 independently of one another are alkyl radicals of 1 to 6 carbon atoms or hydroxyethyl or hydroxypropyl radicals,
    b) at least one alkali metal salt of polyaspartic acid, having a molecular weight of from 5000 g/mol to 50 000 g/mol, or of polyglutamic acid, having a molecular weight of from 5000 g/mol to 50 000 g/mol, or a mixture of both substances, the weight ratio of the constituents a):b) being between 10:1 and 3000:1.
  2. The use of a composition as claimed in claim 1, wherein R1 is an alkyl, alkenyl, alkoxypropyl or alkenylamido group having 10 to 16 carbon atoms.
  3. The use of a composition as claimed in claim 1 and/or 2, wherein constituent b) has a molecular weight of from 7000 to 20 000 g/mol.
  4. The use of a composition as claimed in one or more of claims 1 to 3, wherein additionally defoamers, dyes, complexing agents or antioxidants are present.
  5. The use of a composition as claimed in one or more of claims 1 to 4 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)

Application Number Priority Date Filing Date Title
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
DE10200727 2002-01-11
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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EP1468065A1 EP1468065A1 (en) 2004-10-20
EP1468065B1 true EP1468065B1 (en) 2006-09-20

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CA (1) CA2473037A1 (en)
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ES2378495T3 (en) 2009-07-17 2012-04-13 Clariant Finance (Bvi) Limited Cleaning composition that changes color
WO2012076432A1 (en) * 2010-12-07 2012-06-14 Akzo Nobel Chemicals International B.V. Composition for cleaning of hard surfaces
EP2821473B1 (en) * 2013-07-01 2018-03-28 Becker, Bernhard Process for cleaning a surface and cleaning concentrate for use therein
CN103668243A (en) * 2013-12-20 2014-03-26 海安县吉程机械有限公司 Cleaning agent for bearing with copper aluminum accessories
CN105177600B (en) * 2015-08-21 2018-02-06 温州奥洋科技有限公司 A kind of rust remover

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CA2473037A1 (en) 2003-07-17
EP1468065A1 (en) 2004-10-20
US7053031B2 (en) 2006-05-30
RU2004124382A (en) 2006-01-27
CN1239689C (en) 2006-02-01
ATE340236T1 (en) 2006-10-15
DK1468065T3 (en) 2006-12-11
WO2003057812A1 (en) 2003-07-17
JP2005514493A (en) 2005-05-19
DE50208221D1 (en) 2006-11-02
DE10200727C1 (en) 2003-06-12
NO20043326L (en) 2004-08-10
US20050107284A1 (en) 2005-05-19
CN1596298A (en) 2005-03-16

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