EP0823494A1 - Lactobionamide containing corrosion inhibitors or corrosion preventing compositions - Google Patents

Lactobionamide containing corrosion inhibitors or corrosion preventing compositions Download PDF

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Publication number
EP0823494A1
EP0823494A1 EP97113202A EP97113202A EP0823494A1 EP 0823494 A1 EP0823494 A1 EP 0823494A1 EP 97113202 A EP97113202 A EP 97113202A EP 97113202 A EP97113202 A EP 97113202A EP 0823494 A1 EP0823494 A1 EP 0823494A1
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Prior art keywords
lactobionic acid
corrosion
carbon atoms
agents
chain length
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EP97113202A
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German (de)
French (fr)
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EP0823494B1 (en
Inventor
Klaus Dr. Gerling
Helge Rau
Kornelia Wendler
Karlheinz Uhlig
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Solvay GmbH
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Solvay Deutschland GmbH
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    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M173/00Lubricating compositions containing more than 10% water
    • C10M173/02Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M133/00Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen
    • C10M133/02Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/16Amides; Imides
    • CCHEMISTRY; METALLURGY
    • C23COATING 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
    • C23FNON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/08Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
    • C23F11/10Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
    • C23F11/14Nitrogen-containing compounds
    • C23F11/145Amides; N-substituted amides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/02Water
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/08Amides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/08Amides
    • C10M2215/082Amides containing hydroxyl groups; Alkoxylated derivatives
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/086Imides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/12Partial amides of polycarboxylic acids
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/12Partial amides of polycarboxylic acids
    • C10M2215/122Phtalamic acid
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/28Amides; Imides
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/20Metal working
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00Specified use or application for which the lubricating composition is intended
    • C10N2040/20Metal working
    • C10N2040/22Metal working with essential removal of material, e.g. cutting, grinding or drilling
    • CCHEMISTRY; METALLURGY
    • C10PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10NINDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00Form in which the lubricant is applied to the material being lubricated
    • C10N2050/01Emulsions, colloids, or micelles

Definitions

  • the invention relates to anti-corrosion agents and corrosion inhibitors, which lactobionic acid N-alkylamides and / or Lactobionic acid alkylamine amides and / or di-lactobionic acid alkyl diamides contain.
  • B. Cutting, grinding or drilling become anti-corrosion agents used to protect the machined metal objects from rusting to protect.
  • Many of the usual anti-corrosion agents contain sulfur-containing compounds such.
  • B. petroleum sulfonates or alkylarylsulfonic acids or nitrogenous ones Connections such as B. secondary one or alkanolamines.
  • Sulfur-containing corrosion protection agents have the disadvantage that their active ingredients are slightly sulfur-reducing Microorganisms are modified or broken down.
  • amine-containing Corrosion protection agents which are secondary in particular contain one, there is a possibility that they are hazardous to health Nitrosamines are released, which are have previously formed through uncontrolled chemical reactions. So there is still a need for new anti-corrosion agents, which these disadvantages of the prior art Technology does not have.
  • the present invention is therefore based on the object new anti-corrosion agents and anti-corrosion agents To provide agents.
  • lactobionic acid N-alkylamides whose saturated or unsaturated bound via the amide function Alkyl group a chain length of more than 18, preferably Have 19-30 carbon atoms
  • lactobionic acid alkylaminamides, their saturated or unsaturated bound via the amide function Alkyl group has a chain length of 8 to 30 carbon atoms have, and Di-Lactobionklarealkyldiamide, whose about the amide function bonded saturated or unsaturated alkyl group have a chain length of 8 to 30 carbon atoms, have a corrosion-inhibiting effect.
  • the invention thus relates to anticorrosive agents or corrosion inhibitors that the compounds mentioned their mixtures contain and the use of the compounds mentioned or mixtures thereof as anti-corrosion agents and / or as an additive in metalworking agents for treatment of metals.
  • the treatment of the metals can be done by dipping, Coating, spraying with the agents according to the invention.
  • the anti-corrosion agents contain or inhibitors lactobionic acid N-alkylamides, which by the implementation of lactobionic acid or reactive Lactobionic acid derivatives, preferably lactobionic acid lactone, with a primary fatty amine mixture.
  • Primary fatty amines are used in the context of the present invention denotes primary amines, which one of the aliphatic radical a fatty acid equivalent aliphatic residue with more than 18 carbon atoms, especially 19 to 30 carbon atoms contain.
  • Fettamines can e.g. B. technically obtained from fatty acids by first converting them to their nitriles which are subsequently reduced to amines.
  • fatty amine mixtures are made from rapeseed oil or castor oil or a technical fatty acid mixture with a carbon chain length of more than 18 carbon atoms, used.
  • lactobionic acid alkylaminamides and / or di-lactobionic acid alkyl diamides by the implementation of lactobionic acid or reactive Lactobionic acid derivatives, preferably lactobionic acid lactone, with an ⁇ , ⁇ -primary diamine or an ⁇ , ⁇ -primary diamine mixture were used.
  • ⁇ , ⁇ primary diamines within the scope of the invention, ⁇ , ⁇ primary fatty diamines denotes the aliphatic residue of a fatty acid with 8 contain up to 30 carbon atoms.
  • These fat diamonds can e.g. B. technically obtained from fatty acids in known Way to be implemented to the corresponding diamines.
  • Prefers are fatty diamines or their mixtures that are made from natural occurring or technical fatty acid mixtures obtained were used. The proportion of unsaturated fatty diamines fluctuates between approx. 5 and 85% by weight.
  • the corrosion protection agent according to the invention preferably contains the lactobionic acid N-alkylamides and / or the lactobionic acid alkylaminamides and / or the di-lactobionic acid alkyl diamides in the form of an aqueous solution.
  • the aqueous solutions can be used alone or in a mixture with other compounds used as an anti-corrosion agent or inhibitor will.
  • the content of lactobionic acid derivatives, based on the aqueous solution can be the usual for anti-corrosion agents Concentration range, expediently in the concentration range from 0.01 to 20% by weight, e.g. B. in the concentration range from 0.5 to 10% by weight.
  • the anti-corrosion agents or inhibitors, the lactobionic acid N-alkylamides and / or lactobionic acid alkylaminamides and / or dilactobionic acid alkyl diamides in an aqueous solution may contain completely clear solutions or, in particular in the presence of other compounds, finely divided emulsions be transparent, opaque or milky.
  • lactobionic acid derivatives used can also be used for corrosion protection agents usual connections, e.g. B. petroleum sulfonates, Mineral oils or other additives are mixed and used Treatment of metals can be used.
  • the lactobionic acid derivatives used according to the invention show emulsifying and corrosion-inhibiting effects in mineral oil-containing, aqueous metalworking agents.
  • Another The invention therefore relates to their use in particular water-containing metalworking agents. Under metal working tools are all common for metalworking Liquids, especially cooling lubricants, drilling, Cutting and grinding oils, rust removal, paint stripping and passivation agents Understood. It is therefore possible to use metalworking emulsions to produce which contain a high level of water, without rusting.
  • the corrosion protection used is characterized by good corrosion protection Lactobionic acid derivatives thanks to excellent skin tolerance and high biodegradability.
  • lactobionic acid derivatives The corrosion-inhibiting effect of lactobionic acid derivatives was by means of the chips / filter paper method according to the DIN 51360, part 2, determined.
  • the anti-corrosion properties were determined in accordance with the DIN standard 51360, part 2.
  • Gray cast iron chips (material DIN 1691-GG30 of about 5 mm x 5 mm in size) were washed with petroleum ether, sieved through a wire sieve and dried at about 105 ° C. in a drying cabinet. After drying, it was avoided to touch the chips by hand.
  • a round filter made of filter paper (diameter 40 mm) was placed in a Petri dish and evenly sprinkled with 2 g ( ⁇ 0.1 g) of the dried chips. The chips were then uniformly wetted with 2 ml of the solution to be examined using a full pipette. The lid of the Petri dish was put on and the Petri dish was left to stand for 2 hours at room temperature.
  • the chips were removed from the round filter, the round filter rinsed under running water, swirled in acetone for about 5 seconds and dried at room temperature.
  • the degree of corrosion of the corrosion marks on the round filter was determined by visual inspection.
  • the degree of corrosion determined for the anticorrosive agents according to the invention is given in the table below.
  • a test was only carried out with pure tap water without any additional additives. The corrosion protection effect for a 3% aqueous solution of lactobiontetracosanamide, lactobion-12-aminododecanamide and di-lactobiondodecane-1,12-diamide was determined in each case with tap water.

Abstract

A corrosion inhibitor (I) contains an N-alkylamide of lactobionic acid (II) and/or an alkylamine amide of lactobionic acid (III) and/or an alkyldiamide of di-lactobionic acid (IV) whereby the amide functionality in (II), (III), and (IV) contains an unsaturated alkyl chain of at least 18C atoms (for (II)) or 8-30C atoms (for (III) and (IV)). Also claimed is a metal treatment process by use of (I).

Description

Die Erfindung betrifft Korrosionsschutzmittel und Korrosions-Inhibitoren, welche Lactobionsäure-N-alkylamide und/oder Lactobionsäurealkylaminamide und/oder Di-Lactobionsäurealkyldiamide enthalten.The invention relates to anti-corrosion agents and corrosion inhibitors, which lactobionic acid N-alkylamides and / or Lactobionic acid alkylamine amides and / or di-lactobionic acid alkyl diamides contain.

Bei vielen Vorgängen der Metallbearbeitung wie z. B. Schneiden, Schleifen oder Bohren werden Korrosionsschutzmittel eingesetzt, um die bearbeiteten Metallgegenstände vor Rostbildung zu schützen. Viele der bisher üblichen Korrosionsschutzmittel enthalten schwefelhaltige Verbindungen wie z. B. Petrolsulfonate oder Alkylarylsulfonsäuren oder stickstoffhaltige Ver-bindungen wie z. B. sekundäre eine oder Alkanolamine. Schwefelhaltige Korrosionsschutzmittel haben dabei den Nachteil, daß deren Wirkstoffe leicht von schwefelreduzierenden Mikroorganismen modifiziert bzw. abgebaut werden. Bei aminhaltigen Korrosionsschutzmitteln, welche insbesondere sekundäre eine enthalten, besteht die Möglichkeit, daß aus ihnen gesundheitsgefährdende Nitrosamine freigesetzt werden, welche sich zuvor durch unkontrollierte chemische Reaktionen gebildet haben. Es besteht somit immer noch der Bedarf nach neuen Korrosionsschutzmitteln, welche diese Nachteile des Standes der Technik nicht aufweisen. Hierbei sind insbesondere neue Korrosionsschutzmittel wünschenswert, die als korrosionsinhibierendes Agens einen auch unter Umweltschutzgesichtspunkten günstigen Wirkstoff auf Basis nachwachsender Rohstoffe enthalten. In many metalworking operations such. B. Cutting, grinding or drilling become anti-corrosion agents used to protect the machined metal objects from rusting to protect. Many of the usual anti-corrosion agents contain sulfur-containing compounds such. B. petroleum sulfonates or alkylarylsulfonic acids or nitrogenous ones Connections such as B. secondary one or alkanolamines. Sulfur-containing corrosion protection agents have the disadvantage that their active ingredients are slightly sulfur-reducing Microorganisms are modified or broken down. With amine-containing Corrosion protection agents, which are secondary in particular contain one, there is a possibility that they are hazardous to health Nitrosamines are released, which are have previously formed through uncontrolled chemical reactions. So there is still a need for new anti-corrosion agents, which these disadvantages of the prior art Technology does not have. This includes new anti-corrosion agents desirable as the corrosion inhibitor Agents also favorable from an environmental point of view Active ingredient based on renewable raw materials.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, neue Korrosionsschutzmittel und korrosionsinhibierende Agenzien zur Verfügung zu stellen.The present invention is therefore based on the object new anti-corrosion agents and anti-corrosion agents To provide agents.

Es wurde gefunden, daß Lactobionsäure-N-alkylamide, deren über die Amidfunktion gebundene gesättigte oder ungesättigte Alkylgruppe eine Kettenlänge von mehr als 18, vorzugsweise 19 - 30 Kohlenstoffatome aufweisen, Lactobionsäurealkylaminamide, deren über die Amidfunktion gebundene gesättigte oder ungesättigte Alkylgruppe eine Kettenlänge von 8 bis 30 Kohlenstoffatome aufweisen, und Di-Lactobionsäurealkyldiamide, deren über die Amidfunktion gebundene gesättigte oder ungesättigte Alkylgruppe eine Kettenlänge von 8 bis 30 Kohlenstoffatome aufweisen, eine korrosionsinhibierende Wirkung besitzen.It has been found that lactobionic acid N-alkylamides whose saturated or unsaturated bound via the amide function Alkyl group a chain length of more than 18, preferably Have 19-30 carbon atoms, lactobionic acid alkylaminamides, their saturated or unsaturated bound via the amide function Alkyl group has a chain length of 8 to 30 carbon atoms have, and Di-Lactobionsäurealkyldiamide, whose about the amide function bonded saturated or unsaturated alkyl group have a chain length of 8 to 30 carbon atoms, have a corrosion-inhibiting effect.

Gegenstand der Erfindung sind somit Korrosionsschutzmittel bzw. Korrosionsinhibitoren, die die genannten Verbindungen oder deren Gemische enthalten und die Verwendung der genannten Verbindungen oder deren Gemische als Korrosionsschutzmittel und/oder als Additiv in Metallbearbeitungsmitteln zur Behandlung von Metallen. Die Behandlung der Metalle kann durch Tauchen, Beschichten, Besprühen mit den erfindungsgemäßen Mitteln erfolgen.The invention thus relates to anticorrosive agents or corrosion inhibitors that the compounds mentioned their mixtures contain and the use of the compounds mentioned or mixtures thereof as anti-corrosion agents and / or as an additive in metalworking agents for treatment of metals. The treatment of the metals can be done by dipping, Coating, spraying with the agents according to the invention.

In einer Ausführungsform der Erfindung enthalten die Korrosionschutzmittel bzw. Inhibitoren Lactobionsäure-N-alkylamide, welche durch die Umsetzung von Lactobionsäure oder reaktiven Lactobionsäurederivaten, vorzugsweise Lactobionsäurelacton, mit einem primären Fettamingemisch erhalten wurden. Als "primäre Fettamine" werden im Rahmen der vorliegenden Erfindung primäre Amine bezeichnet, welche einen dem aliphatischen Rest einer Fettsäure entsprechenden aliphatischen Rest mit mehr als 18 Kohlenstoffatomen, insbesondere 19 bis 30 Kohlenstoffatome enthalten. Fettamine können z. B. technisch aus Fettsäuren erhalten werden, in dem diese zunächst in ihre Nitrile überführt werden, welche anschließend zu Aminen reduziert werden. Bevorzugt werden Fettamingemische eingesetzt, welche aus natürlich vorkommenden oder technischen Fettsäuregemischen gewonnen werden. Der Anteil an ungesättigten Fettaminen schwankt dabei in diesen Fettamingemischen zwischen ca. 5 und 85 Gew.-%.In one embodiment of the invention, the anti-corrosion agents contain or inhibitors lactobionic acid N-alkylamides, which by the implementation of lactobionic acid or reactive Lactobionic acid derivatives, preferably lactobionic acid lactone, with a primary fatty amine mixture. As "Primary fatty amines" are used in the context of the present invention denotes primary amines, which one of the aliphatic radical a fatty acid equivalent aliphatic residue with more than 18 carbon atoms, especially 19 to 30 carbon atoms contain. Fettamines can e.g. B. technically obtained from fatty acids by first converting them to their nitriles which are subsequently reduced to amines. Prefers fatty amine mixtures are used, which are natural occurring or technical fatty acid mixtures can be obtained. The proportion of unsaturated fatty amines fluctuates in these fatty amine mixtures between about 5 and 85 wt .-%.

So werden Fettamingemische die aus Rapsöl oder Rizinusöl oder einem technischen Fettsäuregemisch mit einer Kohlenstoffkettenlänge von mehr als 18 Kohlenstoffatome, gewonnen wurden, eingesetzt.This is how fatty amine mixtures are made from rapeseed oil or castor oil or a technical fatty acid mixture with a carbon chain length of more than 18 carbon atoms, used.

In einer anderen Ausführungsform der Erfindung werden Lactobionsäurealkylaminamide und/oder Di-Lactobionsäurealkyldiamide, die durch die Umsetzung von Lactobionsäure oder reaktiven Lactobionsäurederivaten, vorzugsweise Lactobionsäurelacton, mit einem α, Ω-primären Diamin oder einem α, Ω-primären Diamingemisch erhalten wurden, verwendet. Als α, Ω-primäre Diamine im Rahmen der Erfindung werden α, Ω-primäre Fettdiamine bezeichnet, die einen aliphatischen Rest einer Fettsäure mit 8 bis 30 Kohlenstoffatome enthalten. Diese Fettdiamine können z. B. technisch aus Fettsäuren erhalten werden, die in bekannter Weise zu den entsprechenden Diaminen umgesetzt werden. Bevorzugt werden Fettdiamine oder deren Gemische, die aus natürlich vorkommenden oder technischen Fettsäuregemischen gewonnen wurden, eingesetzt. Der Anteil an ungesättigten Fettdiaminen schwankt dabei zwischen ca. 5 und 85 Gew.-%.In another embodiment of the invention, lactobionic acid alkylaminamides and / or di-lactobionic acid alkyl diamides, by the implementation of lactobionic acid or reactive Lactobionic acid derivatives, preferably lactobionic acid lactone, with an α, Ω-primary diamine or an α, Ω-primary diamine mixture were used. As α, Ω primary diamines within the scope of the invention, α, Ω primary fatty diamines denotes the aliphatic residue of a fatty acid with 8 contain up to 30 carbon atoms. These fat diamonds can e.g. B. technically obtained from fatty acids in known Way to be implemented to the corresponding diamines. Prefers are fatty diamines or their mixtures that are made from natural occurring or technical fatty acid mixtures obtained were used. The proportion of unsaturated fatty diamines fluctuates between approx. 5 and 85% by weight.

Durch Veränderung des stöchiometrischen Verhältnisses von Lactobionsäure, bzw. Lactobionsäurelacton zu α, Ω-Fett-Diamin erhält man die gewünschten Aminamide bzw. Diamide.By changing the stoichiometric ratio of Lactobionic acid, or lactobionic acid lactone to form α, Ω-fat diamine the desired aminamides or diamides are obtained.

Lactobionsäure(=4-(β-D-Galacto)-D-Glukonsäure) und Lactobionsäurelacton sowie deren Herstellung sind bereits bekannt. Lactobionsäure kann beispielsweise auf bekannte Weise durch Oxidation von Lactose erhalten werden.Lactobionic acid (= 4- (β-D-galacto) -D-gluconic acid) and lactobionic acid lactone and their manufacture are already known. Lactobionic acid can, for example, in a known manner Oxidation of lactose can be obtained.

Vorzugsweise enthält das erfindungsgemäße Korrosionsschutzmittel die Lactobionsäure-N-alkylamide und/oder die Lactobionsäurealkylaminamide und/oder die Di-Lactobionsäurealkyldiamide in Form einer wäßrigen Lösung. Die wäßrigen Lösungen können dabei alleine oder auch im Gemisch mit weiteren Verbindungen als Korrosionsschutzmittel oder -Inhibitor eingesetzt werden. Der Gehalt an Lactobionsäurederivaten, bezogen auf die wäßrige Lösung, kann dabei im für Korrosionsschutzmittel üblichen Konzentrationsbereich, zweckmäßigerweise im Konzentrationsbereich von 0,01 bis 20 Gew.-%, z. B. im Konzentrationsbereich von 0,5 bis 10 Gew.-%, liegen.The corrosion protection agent according to the invention preferably contains the lactobionic acid N-alkylamides and / or the lactobionic acid alkylaminamides and / or the di-lactobionic acid alkyl diamides in the form of an aqueous solution. The aqueous solutions can be used alone or in a mixture with other compounds used as an anti-corrosion agent or inhibitor will. The content of lactobionic acid derivatives, based on the aqueous solution, can be the usual for anti-corrosion agents Concentration range, expediently in the concentration range from 0.01 to 20% by weight, e.g. B. in the concentration range from 0.5 to 10% by weight.

Die Korrosionsschutzmittel bzw. -Inhibitoren, die Lactobionsäure-N-alkylamide und/oder Lactobionsäurealkylaminamide und/oder Dilactobionsäurealkyldiamide in einer wäßrigen Lösung enthalten, können vollständig klare Lösungen oder, insbesondere bei Gegenwart anderer Verbindungen, feinverteilte Emulsionen sein, die transparent, opak oder auch milchig trüb sein können.The anti-corrosion agents or inhibitors, the lactobionic acid N-alkylamides and / or lactobionic acid alkylaminamides and / or dilactobionic acid alkyl diamides in an aqueous solution may contain completely clear solutions or, in particular in the presence of other compounds, finely divided emulsions be transparent, opaque or milky.

Die verwendeten Lactobionsäurederivate können mit für Korrosionsschutzmittel üblichen Verbindungen, z. B. Petrolsulfonate, Mineralöle oder andere Additive gemischt werden und zur Behandlung der Metalle verwendet werden.The lactobionic acid derivatives used can also be used for corrosion protection agents usual connections, e.g. B. petroleum sulfonates, Mineral oils or other additives are mixed and used Treatment of metals can be used.

Die erfindungsgemäß verwendeten Lactobionsäurederivate zeigen emulgierende und korrosionsinhibierende Wirkung in mineralölhaltigen, wäßrigen Metallbearbeitungsmitteln. Ein weiterer Gegenstand der Erfindung ist daher deren Verwendung in insbesondere wasserhaltigen Metallbearbeitungsmitteln. Unter Metallbearbeitungsmitteln werden dabei alle zur Metallbearbeitung üblichen Flüssigkeiten, insbesondere Kühlschmiermittel, Bohr-, Schneid- und Schleiföle, Entrostungs-, Entlackungs- und Passivierungsmittel verstanden. Es ist daher möglich, Metallbearbeitungsemulsionen herzustellen, welche in hohem Maße Wasser enthalten, ohne daß es dabei zur Rostbildung kommt. Neben einem guten Korrosionsschutz zeichnen sich die erfindungsgemäß verwendeten Lactobionsäurederivate durch eine ausgezeichnete Hautverträglichkeit und hohe biologische Abbaubarkeit aus.The lactobionic acid derivatives used according to the invention show emulsifying and corrosion-inhibiting effects in mineral oil-containing, aqueous metalworking agents. Another The invention therefore relates to their use in particular water-containing metalworking agents. Under metal working tools are all common for metalworking Liquids, especially cooling lubricants, drilling, Cutting and grinding oils, rust removal, paint stripping and passivation agents Understood. It is therefore possible to use metalworking emulsions to produce which contain a high level of water, without rusting. Besides one The corrosion protection used is characterized by good corrosion protection Lactobionic acid derivatives thanks to excellent skin tolerance and high biodegradability.

Die korrosionsinhibierende Wirkung der Lactobionsäurederivate wurde mittels des Späne/Filterpapier-Verfahrens nach der DIN 51360, Teil 2, ermittelt. The corrosion-inhibiting effect of lactobionic acid derivatives was by means of the chips / filter paper method according to the DIN 51360, part 2, determined.

Die nachfolgenden Beispiele sollen die Erfindung weiter erläutern, ohne sie jedoch in ihrem Umfang zu begrenzen.The following examples are intended to further illustrate the invention explain, but without limiting their scope.

BeispieleExamples Beispiel 1:Example 1: Herstellung von langkettigen Lactobionamiden (Lactobiontetracosanamid)Manufacture of long chain lactobionamides (Lactobiontetracosanamide)

500 g (1,47 mol) Lactobionsäurelacton werden bei 50 bis 60 °C in ca. 1,6 l Methanol gelöst. Zu dieser Lösung werden 473 g (1,34 mol) Tetracosanamin unter Rühren eingetragen. Nach 12 Stunden Reaktionszeit bei Raumtemperatur wird der gebildete helle Niederschlag abfiltriert, mit Methanol gewaschen und im Vakuumtrockenschrank bei 40 bis 50 °C getrocknet. Die Ausbeute beträgt 866 g (entspricht 89 % der Theorie) Lactobiontetracosanamid.500 g (1.47 mol) of lactobionic acid lactone are at 50 to 60 ° C. dissolved in about 1.6 l of methanol. 473 g are added to this solution (1.34 mol) tetracosanamine added with stirring. After The reaction time formed is 12 hours at room temperature filtered light precipitate, washed with methanol and in Vacuum drying cabinet dried at 40 to 50 ° C. The yield is 866 g (corresponds to 89% of theory) lactobiontetracosanamide.

Beispiel 2:Example 2: Herstellung von Lactobionalkylaminamid (Lactobion-12-amino-dodecanamid)Manufacture of lactobionalkylaminamide (Lactobion-12-amino-dodecanamide)

500 g (1,47 mol) Lactobionsäurelacton werden bei 40 °C in ca. 2 l Methanol gelöst. Zu dieser Lösung werden 200 g (1 mol) 1,12 Diaminododecan schnell eingetragen. Nach 12 Stunden Reaktionszeit wird der entstehende Niederschlag abfiltriert, mit Methanol nachgewaschen und im Trockenschrank getrocknet. Zur Entfernung von Di-Lactobionsäuredodecandiamid wird eine wäßrige Lösung des Substanzgemisches über einen sauren Ionenaustauscher (z. B. IRA 252) gegeben. Der Durchlauf enthält neben dem unerwünschten Diamid überschüssige Lactobionsäure. Nach Elution des Ionenaustauschers mit 2n NH4OH-Lösung werden nach Entfernung des Wassers und Trocknung des Produktes im Vakuumtrockenschrank 383 g (entspricht 71 % der Theorie) Lactobion-12-amino-dodecanamid erhalten. 500 g (1.47 mol) of lactobionic acid lactone are dissolved in about 2 l of methanol at 40 ° C. 200 g (1 mol) 1.12 diaminododecane are quickly added to this solution. After a reaction time of 12 hours, the precipitate formed is filtered off, washed with methanol and dried in a drying cabinet. To remove di-lactobionic acid dodecanediamide, an aqueous solution of the substance mixture is passed through an acidic ion exchanger (for example IRA 252). In addition to the undesirable diamide, the run contains excess lactobionic acid. After elution of the ion exchanger with 2N NH 4 OH solution, 383 g (corresponds to 71% of theory) of lactobion-12-amino-dodecanamide are obtained after removing the water and drying the product in a vacuum drying cabinet.

Beispiel 3:Example 3: Herstellung von Di-Lactobionsäuredodecan-1,12-diamidPreparation of di-lactobionic acid dodecane-1,12-diamide

500 g (1,47 mol) Lactobionsäurelacton werden bei 50 bis 60 °C in ca. 1,6 l Methanol gelöst und mit 140 g (0,7 mol) 1,12-Diaminododecan versetzt. Nach 12 Stunden Reaktionszeit bei Raumtemperatur wird der erhaltene Niederschlag abfiltriert, mit Methanol nachgewaschen und im Vakuumtrockenschrank bei 40 bis 50 °C getrocknet. Man erhält 486 g (entspricht 76 % der Theorie) als cremefarbenes Pulver Di-Lactobionsäuredodecandiamid.500 g (1.47 mol) of lactobionic acid lactone are at 50 to 60 ° C. dissolved in about 1.6 l of methanol and with 140 g (0.7 mol) of 1,12-diaminododecane transferred. After a reaction time of 12 hours at room temperature the precipitate obtained is filtered off with Washed methanol and in a vacuum drying cabinet at 40 to 50 ° C dried. 486 g are obtained (corresponds to 76% of theory) as a cream-colored powder di-lactobionic acid dodecanediamide.

Bestimmung der Korrosionsschutzeigenschaften:Determination of the corrosion protection properties: Die Korrosionsschutzeigenschaften wurden gemäß der DIN-Norm 51360, Teil 2, durchgeführt.The anti-corrosion properties were determined in accordance with the DIN standard 51360, part 2.

Graugußspäne (Werkstoff DIN 1691-GG30 von etwa 5 mm x 5 mm-Größe) wurden mit Petrolether gewaschen, durch ein Drahtsieb gesiebt und bei ca. 105 °C im Trockenschrank getrocknet. Nach der Trocknung wurde es vermieden, die Späne mit der Hand zu berühren.
In eine Petri-Schale wurde ein Rundfilter aus Filtrierpapier (Durchmesser 40 mm) gelegt und mit 2 g (± 0,1 g) der getrockneten Späne gleichmäßig bestreut. Anschließend wurden die Späne mit 2 ml der zu untersuchenden Lösung mittels einer Vollpipette gleichmäßig benetzt. Es wurde der Deckel der Petri-Schale aufgelegt und die Petri-Schale für 2 Stunden bei Raumtemperatur stehengelassen. Dann wurden die Späne vom Rundfilter entfernt, das Rundfilter unter fließendem Wasser abgespült, in Aceton etwa für 5 Sekunden geschwenkt und bei Raumtemperatur getrocknet. Sofort anschließend an das Reinigen und Trocknen des Rundfilters wurde der Korrosionsgrad der Korrosionsabzeichnungen auf dem Rundfilter durch Sichtprüfung festgestellt. In der nachfolgenden Tabelle wird der ermittelte Korrosionsgrad für die erfindungsgemäßen Korrosionsschutzmittel angegeben. Zur besseren Beurteilung wurde ein Versuch nur mit reinem Leitungswasser ohne weiteren Zusatz durchgeführt. Es wurde jeweils die Korrosionsschutzwirkung für eine mit Leitungswasser angesetzte 3%ige wäßrige Lösung von Lactobiontetracosanamid, Lactobion-12-aminododecanamid und Di-Lactobiondodecan-1,12-diamid ermittelt. Korrosionsgrad Wasser starke Korrosion (Korrosionsgrad IV) Lactobiontetracosanamid (3 Gew.-% in H2O) keine Korrosion (Korrosionsgrad 0) Lactobion-12-aminododecanamid (3 Gew.-% in H2O) Spuren von Korrosion (Korrosionsgrad 0-I) Di-Lactobiondodecan-1,12-diamid (3 Gew.-% in H2O) keine Korrosion (Korrosionsgrad 0) Die vorstehenden Ergebnisse belegen, daß die erfindungsgemäßen Korrosionsschutzmittel, Korrosionsschutzeigenschaften entsprechend der DIN-Norm 51360, Teil 2, besitzen.
Gray cast iron chips (material DIN 1691-GG30 of about 5 mm x 5 mm in size) were washed with petroleum ether, sieved through a wire sieve and dried at about 105 ° C. in a drying cabinet. After drying, it was avoided to touch the chips by hand.
A round filter made of filter paper (diameter 40 mm) was placed in a Petri dish and evenly sprinkled with 2 g (± 0.1 g) of the dried chips. The chips were then uniformly wetted with 2 ml of the solution to be examined using a full pipette. The lid of the Petri dish was put on and the Petri dish was left to stand for 2 hours at room temperature. Then the chips were removed from the round filter, the round filter rinsed under running water, swirled in acetone for about 5 seconds and dried at room temperature. Immediately after cleaning and drying the round filter, the degree of corrosion of the corrosion marks on the round filter was determined by visual inspection. The degree of corrosion determined for the anticorrosive agents according to the invention is given in the table below. For better assessment, a test was only carried out with pure tap water without any additional additives. The corrosion protection effect for a 3% aqueous solution of lactobiontetracosanamide, lactobion-12-aminododecanamide and di-lactobiondodecane-1,12-diamide was determined in each case with tap water. Degree of corrosion water severe corrosion (degree of corrosion IV) Lactobiontetracosanamide (3% by weight in H 2 O) no corrosion (degree of corrosion 0) Lactobion-12-aminododecanamide (3% by weight in H 2 O) Traces of corrosion (degree of corrosion 0-I) Di-lactobione dodecane-1,12-diamide (3% by weight in H 2 O) no corrosion (degree of corrosion 0) The above results prove that the anti-corrosion agents according to the invention have anti-corrosion properties according to DIN standard 51360, part 2.

Claims (6)

Korrosionsschutzmittel oder Korrosionsinhibitor, enthaltend Lactobionsäure-N-alkylamide mit über die Amidfunktion gebundenen gesättigten oder teilweise ungesättigten Alkylresten mit einer Kettenlänge von mehr als 18 Kohlenstoffatomen und/oder Lactobionsäurealkylaminamide mit über die Amidfunktion gebundenen gesättigten oder teilweise ungesättigen Alkylresten mit einer Kettenlänge von 8 bis 30 Kohlenstoffatomen und/oder Di-Lactobionsäurealkyldiamide mit über die Amidfunktion gebundenen gesättigten oder teilweise ungesättigten Alkylresten mit einer Kettenlänge von 8 bis 30 Kohlenstoffatomen.Containing anticorrosive or corrosion inhibitor Lactobionic acid-N-alkylamides with on the amide function bound saturated or partially unsaturated alkyl radicals with a chain length of more than 18 carbon atoms and / or Lactobionic acid alkylaminamides with those bound via the amide function saturated or partially unsaturated alkyl radicals with a chain length of 8 to 30 carbon atoms and / or Di-lactobionic acid alkyl diamides with those bound via the amide function saturated or partially unsaturated alkyl radicals a chain length of 8 to 30 carbon atoms. Korrosionschutzmittel nach Anspruch 1, dadurch gekennzeichnet, daß es Lactobionsäure-N-alkylamide und/oder Lactobionsäurealkylaminamide und/oder Di-Lactobionsäurealkyldiamide in einer Menge von 0,01 bis 20 Gew.-%, vorzugsweise 0,5 bis 10 Gew.-%, enthält.Corrosion protection agent according to claim 1, characterized in that it is lactobionic acid N-alkylamides and / or lactobionic acid alkylaminamides and / or di-lactobionic acid alkyl diamides in an amount of 0.01 to 20% by weight, preferably 0.5 to 10 % By weight. Verwendung eines Korrosionsschutzmittels oder Korrosionsinhibitors gemäß Anspruch 1 und 2 als Additiv in Metallbearbeitungsmitteln.Use of an anti-corrosion agent or corrosion inhibitor according to claims 1 and 2 as an additive in metalworking agents. Verwendung von Lactobionsäure-N-alkylamiden mit über die Amidfunktion gebundenen gesättigten oder teilweise ungesättigten Alkylresten mit einer Kettenlänge von mehr als 18, vorzugsweise 19 bis 30 Kohlenstoffatomen und/oder Lactobionsäurealkylaminamide und /oder Di-Lactobionsäurealkyldiamide in Korrosionsschutzmitteln und/oder Metallbearbeitungsmitteln.Use of lactobionic acid-N-alkylamides with over the amide function bound saturated or partially unsaturated Alkyl residues with a chain length of more than 18, preferably 19 to 30 carbon atoms and / or lactobionic acid alkylaminamides and / or di-lactobionic acid alkyl diamides in Corrosion protection agents and / or metalworking agents. Verfahren zur Metallbehandlung unter Verwendung von Lactobionsäure-N-alkylamiden als Korrosionsschutzmittel und/oder als Additiv in Metallbearbeitungsmitteln, wobei die Metalle mit einer Mischung die Lactobionsäure-N-alkylamide mit über die Amidfunktion gebundenen gesättigten oder teilweise ungesättigten Alkylresten mit einer Kettenlänge von mehr als 18 Kohlenstoffatomen und/oder Lactobionsäurealkylaminamide mit über die Amidfunktion gebundenen gesättigten oder teilweise ungesättigten Alkylresten mit einer Kettenlänge von 8 bis 30 Kohlenstoffatomen und/oder Di-Lactobionsäurealkyldiamide mit über die Amidfunktion gebundenen gesättigten oder teilweise ungesättigten Alkylresten mit einer Kettenlänge von 8 bis 30 Kohlenstoffatomen enthält oder daraus besteht, behandelt werden.Process for metal treatment using Lactobionic acid-N-alkylamides as anti-corrosion agents and / or as an additive in metalworking agents, the metals with a mixture of lactobionic acid N-alkylamides with over the amide function bound saturated or partially unsaturated Alkyl residues with a chain length of more than 18 carbon atoms and / or Lactobionsäurealkylaminamide with over the amide function bound saturated or partially unsaturated Alkyl residues with a chain length of 8 to 30 carbon atoms and / or di-lactobionic acid alkyl diamides with the Amide function bound saturated or partially unsaturated Alkyl residues with a chain length of 8 to 30 carbon atoms contains or consists of be treated. Verfahren zur Behandlung der Metalle nach Anspruch 1, wobei die Metalle mit einer Mischung die Lactobionsäure-N-alkylamide und/oder Lactobionsäurealkylaminamide und/oder Di-Lactobionsäurealkyldiamide in einer Menge von 0,01 bis 20 Gew.-%, vorzugsweise 0,5 bis 10 Gew.-%, enthält, behandelt werden.Process for treating the metals according to claim 1, the metals with a mixture the lactobionic acid N-alkylamides and / or lactobionic acid alkylamine amides and / or di-lactobionic acid alkyl diamides in an amount of 0.01 to 20% by weight, preferably 0.5 to 10 wt .-%, are treated.
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