EP2609185B1 - Flüssigreiniger für automatisierte instrumentverarbeitung - Google Patents

Flüssigreiniger für automatisierte instrumentverarbeitung Download PDF

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Publication number
EP2609185B1
EP2609185B1 EP10754907.3A EP10754907A EP2609185B1 EP 2609185 B1 EP2609185 B1 EP 2609185B1 EP 10754907 A EP10754907 A EP 10754907A EP 2609185 B1 EP2609185 B1 EP 2609185B1
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EP
European Patent Office
Prior art keywords
preferred
sequestering agent
liquid alkaline
salts
alkaline composition
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.)
Not-in-force
Application number
EP10754907.3A
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English (en)
French (fr)
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EP2609185A1 (de
Inventor
Laurence Geret
Carola Stingl
Silke Denzin
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Ecolab USA Inc
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Ecolab USA Inc
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Publication of EP2609185A1 publication Critical patent/EP2609185A1/de
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/06—Hydroxides
    • 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
    • C11D3/0005—Other compounding ingredients characterised by their effect
    • C11D3/0073—Anticorrosion compositions
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/12—Carbonates bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/14—Silicates
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/26—Organic compounds containing oxygen
    • C11D7/265—Carboxylic acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/22—Organic compounds
    • C11D7/32—Organic compounds containing nitrogen
    • C11D7/3245—Aminoacids
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/50—Solvents
    • C11D7/5004—Organic solvents
    • C11D7/5022—Organic solvents containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/16—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions using inhibitors
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/19—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
    • C23G1/22—Light metals
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G3/00—Apparatus for cleaning or pickling metallic material
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D2111/00—Cleaning compositions characterised by the objects to be cleaned; Cleaning compositions characterised by non-standard cleaning or washing processes
    • C11D2111/10—Objects to be cleaned
    • C11D2111/14—Hard surfaces
    • C11D2111/16—Metals

Definitions

  • the invention relates to a liquid alkaline cleaning compositions and methods for automated cleaning processing of surfaces with effective cleaning compositions.
  • the invention relates to liquid alkaline cleaning compositions useful in the cleaning of articles or surfaces, including metal articles or metal surfaces, such as surgical, medical, and dental instruments.
  • WO 03/078691 A2 refers to an alkaline sensitive metal cleaning composition which contains an alkaline concentrate and a corrosion inhibitor concentrate.
  • the alkaline concentrate includes a source of alkalinity in an amount sufficient to provide a use solution having a pH of at least 10.0, and a first chelant component that exhibits soil removal properties when used at a pH of at least 10.0.
  • the corrosion inhibitor concentrate includes a corrosion inhibitor component for reducing corrosion of alkaline sensitive metals when used in a use solution having a pH of at least 10.0, a second chelant component for stabilizing the corrosion inhibitor in the corrosion inhibitor concentrate when the corrosion inhibitor concentrate is provided at a pH that is less than 8.0, and a surfactant component for providing cleaning properties when used at a pH of at least 10.0.
  • Aqueous alkali cleaners are known as effective cleaning agents.
  • many such alkali cleaners have disadvantages when used for automated cleaning processing due to the formation of foam, thus requires the content of additional foam inhibiting agents, which make the composition more complex.
  • the formation of foam lowers the cleaning properties, due to the loss of mechanical agitation.
  • pumping of foam dramatically reduce the liquid flow rates, thus causes dosing and transport problems in the sump, liquid conduits, as well as in the dispensing drawer. Thus, foam is not acceptable in an automated washer.
  • alkaline sensitive metal such as, aluminum or aluminum containing alloys.
  • Exemplary equipment having a surface containing an alkaline sensitive metals include surgical, medical, and dental instruments, sinks, cookware, utensils, machine parts, vehicles, tanker trucks, vehicle wheels, work surfaces, tanks, immersion vessels, spray washers, and ultrasonic baths.
  • Aqueous alkali cleaners are known as effective cleaning agents.
  • alkali cleaners have disadvantages when used on alkaline sensitive metals, such as, aluminum.
  • a problem with using aqueous alkali systems to clean aluminum surfaces is the potential to corrode and/or discolor.
  • blood-containing soils are of significant economic importance to several industries including healthcare and meat processing plants in particular.
  • Dried blood on instruments is hazardous to the employees of the hospital and to the next surgical patient upon which the instruments are used.
  • the danger of handling instruments contaminated with blood is obvious in this age of hepatitis and HIV.
  • Cleaning dried blood is much more difficult than cleaning other soils.
  • Blood-containing soils are particularly tenacious and difficult to remove for at least three reasons.
  • red blood cell surfaces are hydrophobic and therefore difficult to wet with aqueous use solutions of detergents.
  • a second reason for the tenacity of blood-containing soils resides with hemoglobin that has limited water solubility and also contains iron. Iron is particularly difficult to remove from surfaces whether it is an automobile with iron-containing soil adhered to the surface, or a dental instrument with blood on the surface.
  • Fibrin is a protein involved in the clotting of blood. It is a fibrillar protein that is polymerized to form a 'mesh' that forms a haemostatic plug or clot (in conjunction with platelets) over a wound site. This 'mesh' formation is a result of intermolecular cross-linking of cysteine in the protein. While it is desirable and necessary for clot formation, it also acts to make blood-containing stains all the more tenacious. The fibrin jams itself into microscopic irregularities in the surface of instrumentation and fabric. This is a physical attachment to the surface through mechanical means, not just chemical means as with traditional adhesives. The action is similar to the roots of plants growing into cracks in rocks, anchoring themselves to the surface.
  • the object of the present invention is to provide a liquid alkaline composition for automated cleaning processing of hard and/or soft surfaces, in accordance with claim 1 that comprises:
  • the liquid alkaline composition of the invention is a concentrated solution.
  • the concentrated solution can be further diluted by admixing a solvent, preferably water.
  • This diluted liquid alkaline composition obtained from the liquid alkaline composition of the invention is referred to as "ready-to-use" solution.
  • the ratio of components is the weight ratio, if not otherwise indicated in the specification.
  • foam lowers in particular the cleaning properties, due to the loss of mechanical agitation. Further, pumping of foam dramatically reduce the liquid flow rates, thus causes dosing and transport problems in the sump, liquid conduits, as well as in the dispensing drawer. Thus, foam is not acceptable in an automated washer. It has surprisingly found that the liquid alkaline cleaning composition of the invention is remarkable sensitive to metal surfaces; it provides an improved cleaning effect and shows practical no foam formation during the automated cleaning processing.
  • alkaline sensitive metal identifies those metals that exhibit corrosion and/or discoloration when exposed to an alkaline solution.
  • An alkaline solution is a solution having a pH that is ⁇ 8.
  • Exemplary alkaline sensitive metals include soft metals such as aluminum, nickel, tin, zinc, copper, brass, bronze, and mixtures thereof.
  • Aluminum and aluminum alloys are common alkaline sensitive metals that can be cleaned by the cleaning compositions of the invention.
  • Disilicate is a silicate compound that has two silicon atoms in the molecule.
  • a solvent preferably water, can be added add. 100 wt.-% to the composition of the invention.
  • the water content of the composition according to the invention is simply determined by subtracting the amounts of all the usual components from 100 wt. %.
  • the weight amount (wt.-%) is calculated on the total weight amount of the liquid alkaline composition, if not otherwise stated.
  • the total weight amount of all components of the liquid alkaline composition does not exceed 100 wt.-%.
  • liquid alkaline composition of the invention can be free of surfactant/s, such as nonionic tensides, anionic tensides, cationic tensides and amphoteric tensides.
  • liquid alkaline composition of the invention can be free of a hydrotrope component.
  • liquid alkaline composition of the invention can be free of a phosphate.
  • liquid alkaline composition of the invention can be free of a mono silicate.
  • liquid alkaline composition of the invention can be free of at least one additive, preferably all additives, selected from the group of antimicrobials, fungicides, fragrances, dyes, antistatic agents, UV absorbers, reducing agents and/or buffering compounds.
  • disilicates in the composition of the invention avoids deposit as well as deposit corrosion inside a cleaning chamber of an automated cleaning apparatus and on the surface of articles processed therein.
  • the deposit can be a colored residue that remains preferably on surfaces inside the cleaning chamber.
  • the use of disilicates in the liquid alkaline composition of the invention overcomes this drawback. In particular, if the liquid alkaline composition of the invention is free of a surfactant.
  • the specific weight ratio of the disilicate to the sequestering agent according to the present invention provides a good cleaning effect, no or practical no deposit of colored residue is observed even after a number of cleaning processes in combination with no or practical no foaming as required for an automated processing of metal surfaces.
  • the weight ratio of disilicate to sequestering agent can be in the range from 0.20 : 1 to 0.8 : 1, preferably 0.25 : 1 to 0.75 : 1, further preferred 0.30 : 1 to 0.70 : 1, also preferred 0.35 : 1 to 0.65 : 1, more preferred 0.40 : 1 to 0.60 : 1, furthermore preferred 0.45 : 1 to 0.55 : 1, and most preferred 0.50 : 1 to 0.53 : 1.
  • the cleaning action is insufficient.
  • At least one sequestering agent having a good cleaning activity and no or practical no tendency of foam formation can be used.
  • the weight ratio of alkaline source to sequestering agent can be adjusted in the range from 0.1 : 1 to 0.4 : 1, preferably 0.15 : 1 to 0.35 : 1, further preferred 0.20 : 1 to 0.30 : 1, and also preferred 0.23 : 1 to 0.26 : 1. None significant foam formation is observed at a weight ratio of alkaline source to sequestering agent in the range from 0.1 : 1 to 1 : 1, if used as liquid solution, preferably as an aqueous solution, in the dispensing draw of an apparatus for cleaning processing as well as in the cleaning chamber .
  • the cleaning and disinfection action of the liquid alkaline composition of the present invention used in an automated washing process is surprisingly good, even if no surfactants are used.
  • body fluids such as blood, lipids and synovial fluids from joints adhere to the items metal surface used during a procedure. As these fluids dry, the adhesion gets stronger and the fluids get harder to dissolve using ordinary cleaning methods. Blood in particular becomes much more difficult to remove once it has dried. Eventually, the adhesion of the soils becomes too strong for normal detergents to break and the instruments remain soiled after cleaning.
  • the liquid alkaline composition of the present invention is surprisingly extremely mild and reduces this effect to a minimum.
  • an additional second corrosion inhibitor can be used to further prevent corrosion of metal surfaces that are exposed to liquid, preferably aqueous, alkaline solutions.
  • the second corrosion inhibitor is optional and can be omitted.
  • the soil removal or cleaning action of an aqueous solution of the liquid alkaline composition according to the present invention can be achieved by adding at least one sequestering agent to the liquid alkaline composition, which is a salt of GLDA It has been surprisingly found that the addition of sodium gluconate as second sequestering agent increases the cleaning effect of the liquid alkaline composition of the invention.
  • the second sequestering agent is sodium gluconate.
  • a water conditioner In order to improve the cleaning effect and to minor the potential of the liquid alkaline composition to corrode and/or discolor metal surfaces due to the cleaning process a water conditioner can be added.
  • a preferred embodiment of the liquid alkaline composition according to claim 1 can comprise:
  • liquid alkaline composition according to claim 1 can comprise:
  • a liquid alkaline composition of the present invention that provides an increased cleaning effect and is in addition remarkable mild to eloxadized aluminum, may comprises a defined weight ratio of sodium gluconate to the water conditioner in the range from 1 : 1 to 20 : 1, further preferred 5 : 1 to 15 : 1, also preferred 8 : 1 to 12 : 1 and most preferred 9 : 1 to 10 : 1.
  • a preferred embodiment of the liquid alkaline composition according to claim 1 of the invention can comprise:
  • the weight ratio of the sodium gluconate to the water conditioner is in the range from 1 : 1 to 20 : 1, further preferred 5 : 1 to 15 : 1, also preferred 8 : 1 to 12 : 1 and more preferred 9 : 1 to 10 : 1.
  • a liquid alkaline composition according to the present invention that is extremely mild, that means that corrosion is reduced to a minimum, having an improved cleaning effect with respect to metal surfaces to be processed therewith and has no tendency with respect to foam formation at processing can be a liquid alkaline composition that comprises:
  • a liquid alkaline composition can be preferred comprising a first corrosion inhibitor, namely a disilicate and a second corrosion inhibitor that is a triazole derivate.
  • the combination of said first and second corrosion inhibitor can improve the performance of the liquid alkaline composition of the present invention as already mentioned before.
  • a preferred composition that contains said first and second corrosion inhibitor can be a liquid alkaline composition that comprises:
  • the source of alkalinity can be any source of alkalinity that is compatible with the other components of the cleaning composition and that will provide the use solution, i.e. solution as well as the ready-to-use solution with the desired pH.
  • exemplary sources of alkalinity include alkali metal hydroxides, alkali metal salts, phosphates, amines, and mixtures thereof.
  • Exemplary alkali metal hydroxides include sodium hydroxide, potassium hydroxide, and lithium hydroxide.
  • Exemplary alkali metal salts include sodium carbonate, trisodium phosphate, potassium carbonate, and mixtures thereof.
  • Exemplary phosphates include sodium pyrophosphate, potassium pyrophosphate, and mixtures thereof.
  • Exemplary amines include alkanolamine selected from the group comprising triethanolamine, monoethanolamine, diethanolamine, and mixtures thereof.
  • the source of alkalinity preferably an alkali metal hydroxide
  • Alkali metal hydroxides are commercially available as pellets or beads having a mix of particle sizes ranging from 12-100 U. S. mesh, or as an aqueous solution, as for example, as a 45 wt. %, 50 wt. % and a 73 wt. % solution.
  • Mono silicates comprising sodium mono silicate
  • mono silicates when mono silicates are allowed to dry on the surface to be cleaned, films or spots are often formed, which are visible and which are themselves very difficult to remove.
  • the presence of these mono silicate-containing deposits can affect the texture of the cleaned surface, the appearance of the surface, and on cooking or storage surfaces, can affect the taste of the materials that come into contact with the cleaned surfaces. Therefore, it can be preferred that the liquid alkaline composition of the present invention is free of mono silicates.
  • a first corrosion inhibitor namely a disilicate(s) corrosion inhibitor
  • the disilicate(s) corrosion inhibitor can be an alkali disilicate, particularly preferably crystalline or amorphous alkali disilicates in quantities of ⁇ 0.05 wt.-% to ⁇ 10 wt.-%, preferably ⁇ 0.1 wt.-% to ⁇ 8 wt.-%, further preferred ⁇ 1 wt.-% to ⁇ 6 wt.-%, also preferred ⁇ 2 wt.-% to ⁇ 5 wt.-%, especially preferred ⁇ 3 wt.-% to ⁇ 4.5 wt.-%, and more preferred of ⁇ 3.75 wt.-% to ⁇ 4 wt.-%; based on the weight of the liquid alkaline composition.
  • Suitable disilicates can have the formula NaMSi x O 22x+1 .yH 2 O and are marketed for example by Clariant GmbH (Germany) under the trade names Na-SKS. Crystalline, layered silicates of the above formula, in which x stands for 2, are particularly suitable for the purposes of the present invention.
  • silicates can comprise a content by weight of crystalline layered silicates of formula NaMSixO2x+1.yH2O of 0.1 to 20 wt. %, preferably 0.2 to 15 wt. % and particularly 0.4 to 10 wt. %, each based on the total weight of the corrosion inhibitor agent.
  • the second corrosion inhibitor can be a heterocyclic compound, preferably a triazole derivate.
  • the triazole derivate can be selected from the group comprising benzotriazole, 1,2,3-benzotriazole and mixtures thereof.
  • an aqueous alkaline composition having a high pH are often more corrosive than an aqueous composition having a light acidic pH.
  • the pH of the aqueous alkaline solutions of the liquid alkaline composition can be adjusted to a lower pH in the range of ⁇ 11 pH to ⁇ 13 pH and preferably to pH of 12.
  • liquid alkaline composition of this invention examples include magnesium and/or zinc ions and Ca(NO 2 ) 2 .
  • the metal ions are provided in water-soluble form.
  • Examples of useful water-soluble forms of magnesium and zinc ions are the water-soluble salts thereof including the chlorides, nitrates and sulfates of the respective metals. If any of the alkalinity providing agents are the alkali metal carbonates, bicarbonates or mixtures of such agents, magnesium oxide can be used to provide the Mg ion.
  • the magnesium oxide is water soluble and is a preferred source of Mg ions.
  • the useful carboxylated polymer corrosion inhibitors may be generically categorized as water-soluble carboxylic acid polymers such as polyacrylic and polymethacrylic acids or vinyl addition polymers, in addition to the acid-substituted polymers used in the present invention.
  • maleic anhydride copolymers as with vinyl acetate, styrene, ethylene, isobutylene, acrylic acid and vinyl ethers are examples.
  • the polymers tend to be water-soluble or at least colloidally dispersible in water.
  • the molecular weight of these polymers may vary over a broad range although it is preferred to use polymers having average molecular weights ranging between 1,000 up to 1,000, 000. These polymers have a molecular weight of 100,000 or less and between 1,000 and 10,000.
  • the polymers or copolymers may be prepared by either addition or hydrolytic techniques.
  • maleic anhydride copolymers are prepared by the addition polymerization of maleic anhydride and another comonomer such as styrene.
  • the low molecular weight acrylic acid polymer corrosion inhibitors may be prepared by addition polymerization of acrylic acid or its salts either with itself or other vinyl comonomers.
  • such polymers may be prepared by the alkaline hydrolysis of low molecular weight acrylonitrile homopolymers or copolymers.
  • first corrosion inhibitor namely disilicate and the second corrosion namely a heterocyclic compound, preferably a triazole derivate, can be omitted.
  • the liquid alkaline composition according to the present invention can comprise at least one water conditioner.
  • the amount of water conditioner can be ⁇ 0 wt.-% to ⁇ 10 wt.-%, preferably ⁇ 1 wt.-% to ⁇ 5 wt.-%, further preferred ⁇ 1.5 wt.-% to ⁇ 4 wt.-%, and more preferred ⁇ 2 wt.-% to ⁇ 3 wt.-%, based on the weight of the liquid alkaline composition.
  • the water conditioner can be selected from the group comprising salts of phosphonocarboxylic acids, phosphonates, salts of 1-hydroxyethylidene -1,1,-diphosphonic acid (HEDP), salts of acid substituted polymers, and mixtures thereof. preferably salts of acid substituted polymers of monomers of acrylate, methacrylate, salts of polyitaconic acid, salts of polymaleic acid, and mixtures thereof. In particular preferred are salts of polyacrylic acid.
  • the liquid alkaline composition according to the present invention comprises at least one sequestering agent.
  • the amount of sequestering agent can be ⁇ 5 wt.-% to ⁇ 10 wt.-%, preferably ⁇ 6 wt.-% to ⁇ 9 wt.-%, further preferred ⁇ 7 wt.-% to ⁇ 8 wt.-%, and more preferred ⁇ 7.4 wt.-% to ⁇ 7.6 wt.-%, based on the weight of the liquid alkaline composition.
  • the first sequestering agent is selected from salts of N,N-bis(carboxylatomethyl)-L-glutamate (GLDA). Most preferred can be sodium salts of the before mentioned first sequestering agents.
  • Sodium gluconate is used as second sequestering agent.
  • At least one sequestering agent that exhibits soil removal properties when used at a pH of at least 10.0.
  • the sequestering agent is provided for tying up metals in the soil to assist in cleaning and detergency.
  • the sequestering agent can be provided as part of the liquid alkaline composition.
  • Exemplary sequestering agents that exhibit soil removal properties at a pH of greater than 10.0 that can be used according to the invention include sodium gluconate.
  • Suitable solvents include, but are not limited to, water, alcohols, glycols, glycol ethers, esters, and the like, or combinations thereof.
  • Suitable alcohols include, but are not limited to, ethanol, propanol, isopropanol (propan-2-ol), 2-butoxy ethanol (butyl glycol), 1-decanol, benzyl alcohol, glycerin, monoethanolamine (MEA), and the like, or mixtures thereof.
  • Suitable glycols include, but are not limited to, ethylene glycol (monoethylene glycol or MEG), diethylene glycol (propylene glycol or butoxy diglycol or DEG), triethylene glycol (TEG), tetraethylene glycol (TETRA EG), glycerin, propylene glycol, dipropylene glycol, hexylene glycol, and the like, or combinations thereof.
  • the liquid ready-to-use alkaline composition can be obtained from the liquid alkaline composition of the invention by adding additional solvent, preferably water, thereto. It can be preferred that the ready-to-use solution is directly prepared at the place of use.
  • the liquid alkaline composition of the invention is filled into a storage tank of the cleaning apparatus. At the time of use, at least a portion of the liquid alkaline composition of the invention is piped to the place of use, such as the cleaning chamber or cleaning drum, wherein the liquid alkaline composition of the invention is further diluted with a solvent, preferably water, before or at the time, it arrives the place of use.
  • the liquid alkaline composition of the invention can be diluted with additional solvent, such as water, to obtain the ready-to-use solution, in a dispensing draw or dispensing tank of a cleaning apparatus.
  • additional solvent such as water
  • the liquid alkaline composition of the invention can be used without being diluted to a ready-to-use solution.
  • a concentrated solution such as the liquid alkaline composition of the invention, which is further diluted at the time of use has the advantage, that the concentrated solution is less bulky compared to the more diluted ready-to-use solution.
  • total weight, transport volume as well as storage volume of the liquid alkaline composition of the invention is reduced thus facilitates the handling for the user.
  • the cleaning compositions according to the invention can take the form of a single concentrate or multiple concentrates that can be diluted and combined to provide a ready-to-use solution, and as a ready-to-use solution that can be used to clean articles having a metal surface, such as surgical, medical, and dental instruments, including endoscopes.
  • the liquid alkaline composition of the invention can be in the form of a concentrate that can be diluted with a solvent, such as alcohol and/or water, to provide a ready-to-use solution that can be used for cleaning applied to articles having a metal surface, such as surgical, medical, and dental instruments.
  • a solvent such as alcohol and/or water
  • the ready-to-use solution can be provided as a relatively dilute solution that can be, without the addition of water, to provide an organic ready-to use solution, for example an alcohol based ready-to use solution, that can be for cleaning applied to articles having a metal surface, such as surgical, medical, and dental instruments.
  • an organic ready-to use solution for example an alcohol based ready-to use solution, that can be for cleaning applied to articles having a metal surface, such as surgical, medical, and dental instruments.
  • liquid alkaline composition of the invention as a concentrate and then to dilute the concentrate at the situs of use in order to decrease transportation costs associated with transporting large amounts of solvent, such as water.
  • the liquid alkaline composition of the invention and/or the ready-to-use solution obtained there from can be used in an automated washing process for cleaning and disinfection metal surfaces, in particular metal surfaces of surgical, medical, and dental instruments including endoscopes, from body fluids, such as blood, lipids, contrast agent and synovial fluids from joints adhere to the metal surface used during a procedure.
  • body fluids such as blood, lipids, contrast agent and synovial fluids from joints adhere to the metal surface used during a procedure.
  • the source of alkalinity and addition of solvent, such as water, are provided so that the aqueous solution of the liquid alkaline composition according to the present invention (concentrated solution) may have a pH in the range of ⁇ 11 pH to ⁇ 13 pH, preferably a pH in the range of ⁇ 11.5 pH to ⁇ 12.5 pH and more preferred a pH of 12 pH.
  • the source of alkalinity and addition of solvent, such as water, are provided so that the ready-to-use solution of the liquid alkaline composition according to the present invention may have a pH in the range of ⁇ 10 pH to 12 pH and preferably a pH in the range of ⁇ 11 pH to ⁇ 11.5 pH.
  • aqueous solution of the liquid alkaline composition according to the present invention can be further diluted with a solvent to the desired concentration of the ready-to-use solution, wherein the weight ratio for the dilution, i.e.
  • added solvent (weight) : liquid alkaline composition (weight) can be in the range of from 800 : 1 to 1 : 1, preferably 700 : 1 to 10 : 1, further preferred 600 : 1 to 20 : 1, also preferred 550 : 1 to 30 : 1, more preferred 500 : 1 to 40 : 1, in particular preferred 450 : 1 to 40 : 1, especially preferred 400 : 1 to 50 : 1, and most preferred 350 : 1 to 60 : 1.
  • the weight ratio for the dilution i.e.
  • added solvent (weight) : liquid alkaline composition (weight), can be 340 : 1 to 70 : 1, 335 : 1 to 80 : 1,330 : 1 to 90 : 1, 325 : 1 to 100 : 1, 320: 1 to 110 : 1, 320 : 1 to 120 : 1, 310 : 1 to 130 : 1, 300 : 1 to 140 : 1, 290 : 1 to 140 : 1, 250 : 1 to 150 : 1.
  • the ready-to-use solution is a ⁇ 0.1 wt.-% to ⁇ 1 wt.-%, preferably ⁇ 0.2 wt.-% to ⁇ 0.9 wt.-%, further preferred ⁇ 0.3 wt.-% to ⁇ 0.8 wt.-%, also preferred ⁇ 0.4 wt.-% to ⁇ 0.7 wt.-%, ⁇ 0.5 wt.-% to ⁇ 0.6 wt.-%, diluted solution of the liquid alkaline composition of the invention.
  • the ready-to-use liquid alkaline composition may comprises:
  • the ready-to-use solution may comprises:
  • liquid alkaline composition of the invention As well as the ready-to-use solution can be mixed together or added portionwise or one after the other.
  • Another object of the invention is directed to a cleaning device.
  • the cleaning device is used to clean and to disinfect metal and/or plastic articles, preferably articles having a metal and/or plastic surface, such as surgical, medical, and dental instruments.
  • the cleaning device may include at least a first tank to receive the liquid alkaline composition of the invention; optional at least a second component tank to receive the ready-to-use solution of said liquid alkaline composition of the invention, a water feed, and at least one solution line.
  • the first component tank is provided for containing the liquid alkaline composition of the invention.
  • the first component tank can be provided for mixing water to the liquid alkaline composition to provide the ready-to-use solution.
  • the liquid alkaline composition can be mixed with a solution, preferably water.
  • the optional second component tank can be provided for receiving the liquid alkaline composition of the invention for mixing with a solvent, preferably water, to provide the alkaline ready-to-use solution.
  • a solvent preferably water
  • the ready-to-use solution or the liquid alkaline composition of the invention can be in any form including liquid, gel and slurry.
  • the cleaning solutions i.e. ready-to-use solution and/or the liquid alkaline composition of the invention, are suitable to treat any metal surface contaminated with a wide variety of contaminants.
  • Exemplary contaminants include body fluids, such as blood, lipids and synovial fluids and chemical residues.
  • aqueous cleaning solutions of this invention i.e. the aqueous alkaline ready-to-use solution and/or the liquid alkaline composition of the invention, may be used at any temperature, including an elevated temperature of from about 30° C to 70° C, preferably 45° C to 60° C and more preferred 55° C. After contact with the cleaning solution, the solution is removed from the metal surface.
  • the contact time of the liquid alkaline composition of the invention or preferably the ready-to-use solution in an automated process with the metal substrates will vary depending upon the degree of contamination but broadly will range between a few seconds or ⁇ 1 minute to ⁇ 30 minutes, with ⁇ 3 minutes to ⁇ 15 minutes being more typical and most preferred is ⁇ 5 minutes to ⁇ 10 minutes.
  • This test method provides a basis to assess the cleaning efficiency of instruments whose metal surface is contaminated with blood soils.
  • V2A blood soil covered stainless steel test plates
  • the liquid cleaning composition E1 according to the invention and comparative compositions C1 to C2 were diluted with deionized water to a 0.3 wt.-% ready-to-use solution.
  • each 600 ml beaker 400 ml of the ready-to-use solutions E1, C1 and C2 were added respectively.
  • a transparent plastic stick secured the top of the metal plate.
  • the blood soil contaminated stainless steel test plate (V2A) were allow to stay each at a determined time and temperature as given in table 2. Thereafter the so treated blood soil contaminated stainless steel test plate (V2A) were completely dipped 5 x times for 7 seconds into a 1000 ml beaker with deionized water and placed on clean paper allowed to dry for 30 minutes. Subsequently, the so treated blood soil covered stainless steel test plates (V2A) were dried in a drying oven at 45° C for 1 hour and allowed to cool at room temperature for 20 minutes. Thereafter, said treated blood soil contaminated stainless steel test plates (V2A) were scaled to determine the blood removal effectiveness, see table 2.
  • This test method provides a basis to assess the enhanced metal-surface-safeness of the liquid alkaline cleaning composition of the invention with respect to corrosion.
  • the cleaning compositions E1 and C2 of table 1 were diluted with deionized water to a 0.8 wt.-% ready-to-use solution.
  • the weights of two aluminum test plates of 100 mm x 50 mm x 1.5 mm were recorded and then placed in the center area of the bottom of a 350 ml wide-necked screw cap flask each. The aluminum test plates were completely submerged. Subsequently, each wide-necked screw cap flask was filed to the top with said 0.8 wt.-% ready-to-use solution E1 and C2 having a temperature of 23° C. The wide-necked screw cap flasks were closed with the cap and allow staying for 7 days at a temperature of 23° C.
  • the aluminum test plates were removed, rinsed with deionized water, placed on a clean paper towel and allowed to dry at a temperature of 23° C. The aluminum test plates were then weighted and the weight was taken to the fourth place. Subsequently the aluminum test plates were returned in there wide-necked screw cap flasks for another 7 days. Thereafter, the aluminum test plates were removed, rinsed with deionized water, placed on a clean paper towel and allowed to dry at a temperature of 23° C. The aluminum test plates were then weighted and the weight was taken to the fourth place. Subsequently the aluminum test plates were returned again in there wide-necked screw cap flasks for another 7 days. The weight loss was calculated.
  • This test method provides a basis to assess the foam formation properties of the liquid alkaline cleaning composition of the invention.
  • the cleaning compositions E2 to E13 of table 4 were diluted with deionized water to a 1.0 wt.-%, ready-to-use solution, to a 0.8 wt.-% ready-to-use solution, to a 0.5 wt.-% ready-to-use solution, and to a 0.3 wt.-% ready-to-use solution.
  • Each long-necked glass cylinder was filed with 100 ml of the ready-to-use solution of 23° C respectively. The long-necked glass cylinder was then turned up and down 20 x times in 20 seconds. Thereafter the glass cylinder was placed and the foam depth of each cylinder was scaled in ml to determine the foam formation.
  • the liquid alkaline cleaning solution of the invention is a non-foaming composition.
  • Table 4 Liquid cleaning composition E2 to E13 of the invention Components Wt.-% E2 E3 E4 E5 E6 E7 Sodium disilicate *1 5 5 5 5 5 5 5 Sodium hydroxide 2 2 2 2 2 2 1,2,3 benzotriazole 0.2 0.2 0.2 0.2 0.2 0.2 0.2 GLDA *3 7.6 NTA *6 7.6 EDTA *7 7.6 HEDTA *8 7.6 DEG *9 7.6 EDG *10 7.6 Sodium gluconate 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 Deionized Water Add. 100 Add. 100 Add. 100 Add. 100 Add. 100 Add.
  • NTA Sodium salt of nitrilotriacetic acid
  • EDTA ethylene diamine tetraacetic acid
  • HEDTA Sodium salt of hydroxyethyl ethylene diamine triacetic acid
  • DEG diethanolglycine sodium salt
  • EDG Sodium salt of ethanoldiglycine disodium salt
  • Metal surfaces and/or plastic surfaces in need of cleaning are found in several locations. Exemplary locations include surgical instruments, medical instruments, and dental instruments, sinks, cookware, utensils, machine parts, vehicles, tanker trucks, vehicle wheels, work surfaces, tanks, immersion vessels, spray washers, and ultrasonic baths.
  • the cleaning compositions of the present invention can be used for removing residues including blood, greases, cutting fluids, drawing fluids, machine oils, antirust oils such as cosmoline, carbonaceous soils, sebaceous soils, particulate matter, waxes, paraffins, used motor oil, fuels, etc..
  • Metal surfaces that can be cleaned include iron-based metals such as iron, iron alloys, e. g. steel, tin, aluminum, copper, tungsten, titanium, molybdenum, etc., for example.
  • the structure of the metal surface to be cleaned can vary widely.
  • the metal surface can be as a metal part of complex configuration, sheeting, coils, rolls, bars, rods, plates, disks, etc.
  • liquid alkaline cleaning solution of the invention in particular the ready-to-use-solution to clean metal and/or plastic articles, especially metal instruments, plastic instruments, instruments with a plastic surface and/or instruments with a metal surface.
  • liquid alkaline cleaning solution of the invention in particular the ready-to-use-solution, to clean in an automated instrument processing metal and/or plastic articles, especially metal instruments, plastic instruments, instruments with a plastic surface and/or instruments with a metal surface.
  • composition containing "a compound” includes a mixture of two or more compounds.
  • the term “or” is generally employed in its sense including “and/or” unless the content clearly dictates otherwise.

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Claims (11)

  1. Flüssige alkalische Zusammensetzung zum Reinigen von Metalloberflächen, dadurch gekennzeichnet, dass sie Folgendes umfasst:
    - ≥ 0,1 Gew.-% bis ≤ 6 Gew.-% mindestens einer alkalischen Quelle,
    - ≥ 1 Gew.-% bis ≤ 10 Gew.-% mindestens eines Disilikat-Korrosionsinhibitors eines Alkalidisilikats,
    - ≥ 5 Gew.-% bis ≤ 10 Gew.-% mindestens eines ersten Sequestriermittels, wobei das erste Sequestriermittel ausgewählt ist aus Salzen von N,N-bis(Carboxylatomethyl)-L-glutamat (GLDA),
    - ≥ 5 Gew.-% bis ≤ 35 Gew.-% Natriumgluconat als zweites Sequestriermittel und
    - mindestens ein Lösungsmittel, wobei
    das Gewichtsverhältnis des Disilikats zum Sequestriermittel im Bereich von 0,1:1 bis 1:1 liegt und das Gewichtsverhältnis der alkalischen Quelle zum Sequestriermittel im Bereich von 0,01:1 bis 1:1 liegt.
  2. Flüssige alkalische Zusammensetzung nach Anspruch 1, Folgendes umfassend:
    - ≥ 0,1 Gew.-% bis ≤ 6 Gew.-%, vorzugsweise ≥ 0,5 Gew.-% bis ≤ 5 Gew.-%, ferner bevorzugt ≥ 1 Gew.-% bis ≤ 4 Gew.-%, ebenfalls bevorzugt ≥ 1,5 Gew.-% bis ≤ 3 Gew.-%, und stärker bevorzugt ≥ 2 Gew.-% bis ≤ 2,5 Gew.-% von mindestens einer alkalischen Quelle;
    - ≥ 1 Gew.-% bis ≤ 10 Gew.-%, vorzugsweise ≥ 1,5 Gew.-% bis ≤ 8 Gew.-%, ferner bevorzugt ≥ 2 Gew.-% bis ≤ 6 Gew.-%, ebenfalls bevorzugt ≥ 3 Gew.-% bis ≤ 4 Gew.-%, und stärker bevorzugt ≥ 3,5 Gew.-% bis ≤ 3,75 Gew.-% mindestens eines Disilikats eines Alkalidisilikats;
    - ≥ 5 Gew.-% bis ≤ 10 Gew.-%, vorzugsweise ≥ 6 Gew.-% bis ≤ 9 Gew.-%, ferner bevorzugt ≥ 7 Gew.-% bis ≤ 8 Gew.-% und stärker bevorzugt ≥ 7,4 Gew.-% bis ≤ 7,6 Gew.-% mindestens eines ersten Sequestriermittels, wobei das erste Sequestriermittel ausgewählt ist aus Salzen von N,N-bis(Carboxylatomethyl)-L-glutamat (GLDA);
    - ≥ 5 Gew.-% bis ≤ 35 Gew.-%, ferner bevorzugt ≥ 10 Gew.-% bis ≤ 30 Gew.-%, ebenfalls bevorzugt ≥ 15 Gew.-% bis ≤ 27 Gew.-%, und stärker bevorzugt ≥ 20 Gew.-% bis ≤ 25 Gew.-% Natriumgluconat als zweites Sequestriermittel;
    - ≥ 0 Gew.-% bis ≤ 10 Gew.-%, vorzugsweise ≥ 1 Gew.-% bis ≤ 5 Gew.-%, ferner bevorzugt ≥ 1,5 Gew.-% bis ≤ 3 Gew.-% und stärker bevorzugt ≥ 2 Gew.-% bis ≤ 2,5 Gew.-% mindestens eines Wasseraufbereiters;
    - ≥ 0 Gew.-% bis ≤ 1 Gew.-%, vorzugsweise ≥ 0,05 Gew.-% bis ≤ 0,8 Gew.-%, ferner bevorzugt ≥ 0,1 Gew.-% bis ≤ 0,5 Gew.-% und stärker bevorzugt ≥ 0,2 Gew.-% bis ≤ 0,3 Gew.-%, von mindestens einem Korrosionsinhibitor, vorzugsweise eine heterocyclische Verbindung, stärker bevorzugt ein Triazolderivat; und
    - Lösungsmittel wird hinzugefügt bis auf 100 Gew.-%; wobei die Gew.-% der Komponenten auf das Gesamtgewicht der Zusammensetzung bezogen sind.
  3. Flüssige alkalische Zusammensetzung nach Anspruch 1 oder 2, wobei die Zusammensetzung mindestens eine alkalische Quelle umfasst, die aus der Gruppe Natriumhydroxid, Natriumcarbonat, Kaliumhydroxid und Lithiumhydroxid ausgewählt ist.
  4. Flüssige alkalische Zusammensetzung nach den Ansprüchen 1 bis 3, wobei der Wasseraufbereiter ausgewählt ist aus der Gruppe der Salze von Phosphonocarbonsäuren, Phosphonaten, Salzen der 1-Hydroxyethyliden-1,1,-diphosphonsäure (HEDP), Salzen von säuresubstituierten Polymeren, Salzen von säuresubstituierten Polymeren von Acrylatmonomeren, Methacrylat, Salzen der Polyitaconsäure, Salzen der Polymaleinsäure und Gemischen davon, wobei die 1-Hydroxyethyliden-1,1,-diphosphonsäure (HEDP) am stärksten bevorzugt ist.
  5. Flüssige alkalische Zusammensetzung nach Anspruch 1 bis 4, wobei der Korrosionsinhibitor ausgewählt ist aus der Gruppe umfassend eine heterocyclische Verbindung, vorzugsweise ein Triazolderivat, stärker bevorzugt ein Benzotriazol, 1,2,3-Benzotriazol und Gemische davon.
  6. Flüssige alkalische Zusammensetzung nach den Ansprüchen 1 bis 5, wobei das Lösungsmittel ausgewählt ist aus der Gruppe umfassend Wasser, Alkohole, Glykole, Glykolether, Ester, vorzugsweise Ethanol, Propanol, Propan-2-ol, 2-Butoxyethanol, 1-Decanol, Benzylalkohol, Glycerin, Monoethanolamin und Gemischen davon, wobei Wasser am stärksten bevorzugt ist.
  7. Flüssige alkalische Zusammensetzung nach Anspruch 1 bis 6, wobei die flüssige alkalische Zusammensetzung eine konzentrierte Lösung oder eine gebrauchsfertige Lösung ist.
  8. Gebrauchsfertige flüssige alkalische Zusammensetzung nach Anspruch 7, Folgendes umfassend:
    - ≥ 0,0003 Gew.-% bis ≤ 0,2 Gew.-%, vorzugsweise ≥ 0,0005 Gew.-% bis ≤ 0,1 Gew.-%, ferner bevorzugt ≥ 0,0007 Gew.-% bis ≤ 0,08 Gew.-%, ebenfalls bevorzugt ≥ 0,0009 Gew.-% bis ≤ 0,07 Gew.-%, ebenfalls bevorzugt ≥ 0,001 Gew.-% bis ≤ 0,075 Gew.-%, insbesondere bevorzugt ≥ 0,003 Gew.-% bis ≤ 0,07 Gew.-%, insbesondere bevorzugt ≥ 0,005 Gew.-% bis ≤ 0,06 Gew.-% und stärker bevorzugt ≥ 0,003 Gew.-% bis ≤ 0,06 Gew.-% von mindestens einer alkalischen Quelle;
    - ≥ 0,003 Gew.-% bis ≤ 0,03 Gew.-%, vorzugsweise ≥ 0,0045 Gew.-% bis ≤ 0,024 Gew.-%, ferner bevorzugt ≥ 0,006 Gew.-% bis ≤ 0,018 Gew.-%, ebenfalls bevorzugt ≥ 0,009 Gew.-% bis ≤ 0,012 Gew.-% und stärker bevorzugt ≥ 0,01 Gew.-% bis ≤ 0,01 Gew.-% von mindestens einem Disilikat eines Alkalidisilikats;
    - ≥ 0,015 Gew.-% bis ≤ 0,03 Gew.-%, vorzugsweise ≥ 0,018 Gew.-% bis ≤ 0,027 Gew.-%, ferner bevorzugt ≥ 0,021 Gew.-% bis ≤ 0,024 Gew.-% und stärker bevorzugt ≥ 0,022 Gew.-% bis ≤ 0,023 Gew.-% mindestens eines ersten Sequestriermittels, wobei das erste Sequestriermittel ausgewählt ist aus Salzen von N,N-bis(Carboxylatomethyl)-L-glutamat (GLDA);
    - ≥ 0,015 Gew.-% bis ≤ 0,10 Gew.-%, ferner bevorzugt ≥ 0,03 Gew.-% bis ≤ 0,09 Gew.-%, ebenfalls bevorzugt ≥ 0,045 Gew.-% bis ≤ 0,08 Gew.-%, und stärker bevorzugt ≥ 0,06 Gew.-% bis ≤ 0,075 Gew.-%, Natriumgluconat als zweites Sequestriermittel;
    - ≥ 0 Gew.-% bis ≤ 0,03 Gew.-%, vorzugsweise ≥ 0,003 Gew.-% bis ≤ 0,015 Gew.-%, ferner bevorzugt ≥ 0,0045 Gew.-% bis ≤ 0,009 Gew.-% und stärker bevorzugt ≥ 0,006 Gew.-% bis ≤ 0,0075 Gew.-%, mindestens eines Wasseraufbereiters;
    - ≥ 0 Gew.-% bis ≤ 0,003 Gew.-%, vorzugsweise ≥ 0,00015 Gew.-% bis ≤ 0,002 Gew.-%, ferner bevorzugt ≥ 0,0003 Gew.-% bis ≤ 0,0015 Gew.-% und stärker bevorzugt ≥ 0,0006 Gew.-% bis ≤ 0,001 Gew.-% von mindestens einem Korrosionsinhibitor; und
    - Lösungsmittel wird hinzugefügt bis auf 100 Gew.-%; wobei die Gew.-% der Komponenten auf das Gesamtgewicht der Zusammensetzung bezogen sind.
  9. Verwendung der Lösung nach den Ansprüchen 1 bis 8 zum Reinigen von Blutverschmutzungen von Metall- und/oder Kunststoffgegenständen, vorzugsweise Metallinstrumenten, Kunststoffinstrumenten, Instrumenten mit einer Kunststoffoberfläche und/oder Instrumenten mit einer Metalloberfläche.
  10. Verwendung der Lösung nach Anspruch 9 zum Reinigen von Blutverschmutzungen in einer automatisierten Instrumentenbearbeitung von Metall- und/oder Kunststoffgegenständen, Metalloberflächen und/oder Kunststoffoberflächen, vorzugsweise Metallinstrumenten, Kunststoffinstrumenten, Instrumenten mit einer Kunststoffoberfläche und/oder Instrumenten mit einer Metalloberfläche.
  11. Reinigungsvorrichtung, Folgendes umfassend:
    (a) mindestens einen ersten Behälter, der eine flüssige alkalische Zusammensetzung nach den Ansprüchen 1 bis 8 mit einem pH-Wert von ≥ 11 bis ≤ 13, vorzugsweise einem pH-Wert von ≥ 11,5 bis ≤ 12,5 und stärker bevorzugt einem pH-Wert von 12 aufweist;
    (b) eine Lösungsleitung zum Transportieren einer Lösung von einem Behälter zu einem Applikator und/oder zum Verwendungsort.
EP10754907.3A 2010-08-27 2010-08-27 Flüssigreiniger für automatisierte instrumentverarbeitung Not-in-force EP2609185B1 (de)

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MX2015016424A (es) 2013-05-27 2016-03-03 Basf Se Soluciones acuosas que contienen un agente complejante de alto grado de concentracion.
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US6686325B2 (en) * 2002-03-15 2004-02-03 Ecolab Inc. Alkaline sensitive metal cleaning composition, method for cleaning an alkaline sensitive metal surface, and washing facility

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