EP2625257B2 - Efficacité de nettoyage d'une matière solide sans danger pour les métaux pour le traitement automatisé d'instruments - Google Patents

Efficacité de nettoyage d'une matière solide sans danger pour les métaux pour le traitement automatisé d'instruments Download PDF

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Publication number
EP2625257B2
EP2625257B2 EP10773872.6A EP10773872A EP2625257B2 EP 2625257 B2 EP2625257 B2 EP 2625257B2 EP 10773872 A EP10773872 A EP 10773872A EP 2625257 B2 EP2625257 B2 EP 2625257B2
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preferred
salts
acid
composition
alkaline
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German (de)
English (en)
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EP2625257B1 (fr
EP2625257A1 (fr
Inventor
Laurence Geret
Carola Stingl
Beana Pathicheril
Christoph Kurzawe
Matt Porter
Jill Lubich
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Ecolab USA Inc
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Ecolab USA Inc
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    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/044—Hydroxides or bases
    • 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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/046—Salts
    • 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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/06—Phosphates, including polyphosphates
    • 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
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/08—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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/02—Inorganic compounds ; Elemental compounds
    • C11D3/04—Water-soluble compounds
    • C11D3/10—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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2068—Ethers
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2079—Monocarboxylic acids-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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2082—Polycarboxylic acids-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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/20—Organic compounds containing oxygen
    • C11D3/2075—Carboxylic acids-salts thereof
    • C11D3/2086—Hydroxy carboxylic acids-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
    • C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16—Organic compounds
    • C11D3/26—Organic compounds containing nitrogen
    • C11D3/28—Heterocyclic compounds containing nitrogen in the ring
    • 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
    • C11D7/00—Compositions of detergents based essentially on non-surface-active compounds
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • 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
    • C11D7/02—Inorganic compounds
    • C11D7/04—Water-soluble compounds
    • C11D7/10—Salts
    • C11D7/16—Phosphates including polyphosphates
    • 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
    • C11D7/263—Ethers
    • 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
    • C11D7/3281—Heterocyclic compounds

Definitions

  • the invention relates to a solid alkaline concentrated cleaning composition and methods for automated cleaning processing of surfaces with effective cleaning compositions.
  • the invention relates to solid alkaline concentrated cleaning compositions useful in the cleaning of articles or surfaces, including plastic articles, plastic surfaces, metal articles, metal surfaces, such as surgical, medical, and dental instruments.
  • 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.
  • Solid alkaline cleaning compositions comprising an alkaline source and polyethylene glycol are disclosed in WO 2007/131549 , WO 2004/085596 , US 5756444 and US 3293148 .
  • the object of the present invention is to provide a solid alkaline composition for cleaning, comprising ⁇ 10 wt.-% to ⁇ 50 wt.-% of at least one alkaline source selected from the group consisting of sodium hydroxide, potassium hydroxide, and lithium hydroxide, ⁇ 0.5 wt.-% to ⁇ 20 wt.-% of at least one polyethylene glycol, ⁇ 2 wt.-% to ⁇ 10 wt.-% of at least one corrosion inhibitor, and a solvent is added add. 100 wt.-%, wherein the weight ratio of alkaline source to polyethylene glycol is in the range from 20 :1 to 2 :1 and wherein the weight-% of the components are based on the total weight of the composition.
  • the alkaline cleaning composition of the invention is remarkable sensitive to metal articles, metal surfaces, plastic articles and/or plastic surfaces.
  • alkaline sensitive metal identifies those metals that exhibit corrosion and/or discoloration when exposed to an aqueous alkaline solution.
  • An aqueous alkaline solution is an aqueous solution having a pH that is greater than about 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.
  • references herein to a "solid" composition are to those, which are solid at about 23° C and up to about 60° C.
  • the solid composition of the present invention may be form stable and/or rigid.
  • a solvent preferably water, can be added add. 100 wt.-% to the composition of the invention.
  • the solvent content, such as the water content, of the composition according to the invention is simply determined by subtracting the amounts of all the usual ingredients from 100 wt. %.
  • the weight-% (wt.-%) of the components are calculated based on the total weight amount of the composition, if not otherwise stated.
  • the ratio of components is parts by weight, if not otherwise stated.
  • the total amount of all components of the composition does not exceed 100 wt.-%.
  • compositions of the invention are free of other surfactants, except polyethylene glycol.
  • compositions of the invention can be free of a hydrotrope component.
  • compositions of the invention can be free of a zeolite.
  • compositions 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.
  • the specific ratio of the alkaline source to polyethylene glycol according to the present invention provides a good cleaning effect in combination with low foaming as required for an automated processing of metal articles, metal surfaces, plastic articles and/or plastic surfaces.
  • the ratio or concentration of polyethylene glycol in the solid alkaline composition of the present invention is selected to high. However, if the ratio or concentration of polyethylene glycol is selected too low, the cleaning action is insufficient.
  • the weight ratio of alkaline source to polyethylene glycol is in the range from 20:1 to 2:1, preferably about 20:1 to about 5:1, further preferred about 20:1 to about 8:1, also preferred about 18:1 to about 10:1 and in addition preferred about 15:1 to about 12:1.
  • Non or practical non foam formation is observed for the compositions according to the present invention, especially in the dispensing draw of an apparatus for cleaning processing as well as in the cleaning chamber.
  • the cleaning and disinfection action of a solid alkaline composition of the present invention used in an automated washing process is surprisingly good, although the concentration of the polyethylene glycol in the solid alkaline composition of the present invention is relatively low.
  • 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.
  • a problem with using aqueous alkali systems to clean metal surfaces, such as aluminum surfaces is the potential to corrode and/or discolor. Therefore, a corrosion inhibitor is used to prevent corrosion of metal surfaces that are exposed to aqueous alkaline solutions.
  • silicate(s) corrosion inhibitor is optional and can be omitted.
  • Silicates comprising sodium silicate, have a tendency to begin precipitating from aqueous solution at a pH below 11, thus reducing its effectiveness to prevent corrosion of the contacted surfaces when used in aqueous cleaning solutions having a lower pH.
  • silicates when 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 silicon-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.
  • the alkaline composition of the invention is found to be a sensitive metal and/or plastic cleaning composition.
  • the sensitive metal and/or plastic cleaning composition of the invention in use minors or avoids corrosion in such an extent that the addition of silicate(s) corrosion inhibitor is not required.
  • silicate(s) corrosion inhibitor can be used in the solid composition according to the present invention.
  • the silicate(s) corrosion inhibitor can be an alkali silicate, particularly preferably crystalline or amorphous alkali disilicates in quantities of about ⁇ 0.05 to about ⁇ 10, preferably about ⁇ 0.1 to about ⁇ 5 and more preferred of about ⁇ 0.5 to about ⁇ 2; wherein the weight-% of the components are based on the total weight of the composition.
  • 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 solid alkaline composition can be adjusted to a lower pH in the range of about ⁇ 11 pH to about ⁇ 13 pH.
  • the soil removal or cleaning action of an aqueous solution of the solid alkaline composition according to the present invention can be improved by adding at least one sequestering agent to the solid alkaline composition, preferably at least one sequestering agent that exhibits soil removal properties.
  • the source of alkalinity selected from the group consisting of sodium hydroxide, potassium hydroxide and lithium hydroxide is the source of alkalinity that is compatible with the other components of the cleaning composition and that will provide the use solution, i.e. concentrated liquid composition as well as the ready-to-use solution with the desired pH.
  • the source of alkalinity may be added to the composition in a variety of forms, including for example in the form of solid beads, dissolved in an aqueous solution or a combination thereof.
  • 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 about 45 wt. %, about 50 wt. % and about 73 wt. % solution.
  • a suitable polyethylene glycol for use in the present invention can have a molecular weight (MW) in the range of about ⁇ 4000 to about ⁇ 12000, preferably about ⁇ 6000 to about ⁇ 10000 and more preferred of about ⁇ 7000 to about ⁇ 8000.
  • Polyethylene glycol that can be used are marketed for example by BASF under the tradename PLURIOL ® .
  • the corrosion inhibitor can be selected from the group comprising silicate, calcium acetate, calcium chloride, calcium gluconate, calcium phosphate, calcium borate, calcium carbonate, calcium citrate, calcium lactate, calcium sulfate, calcium tartrate, benzotriazole, 1,2,3-benzotriazole and mixtures thereof.
  • the corrosion inhibitor is a heterocyclic compound, a triazole derivate, such as a benzotriazole or 1,2,3-benzotriazole and mixtures thereof.
  • silicates include sodium metasilicates, sesquisilicates, orthosilicates, potassium silicates, and mixtures thereof. However, most preferred can be sodium silicate.
  • the silicates may comprise at least one crystalline layer-forming silicate of the general formula NaMSixO2x+1.yH2O, wherein M represents sodium or hydrogen, x is a number from about 1.9 to about 22, preferably about 1.9 to about 4 and y stands for a number from about 0 to about 33.
  • the crystalline layer-forming silicates of the formula NaMSixO22x+1.yH2O are marketed for example by Clariant GmbH (Germany) under the trade names Na-SKS, eg. Na-SKS-1 (Na2Si22O45.xH2O, Kenyait), Na-SKS-2 (Na2Si14O29.xH2O, Magadiit), Na-SKS-3 (Na2Si8O17.xH2O) or Na-SKS-4 (Na2Si4O9.xH2O, Makatit).
  • Na-SKS eg. Na-SKS-1 (Na2Si22O45.xH2O, Kenyait)
  • Na-SKS-2 Na2Si14O29.xH2O, Magadiit
  • Na-SKS-3 Na2Si8O17.xH2O
  • Na-SKS-4 Na2Si4O9.xH2O, Makatit).
  • Crystalline, layered silicates of the above formula, in which x stands for 2, are particularly suitable for the purposes of the present invention.
  • Na-SKS-5 alpha -Na2Si2O5
  • Na-SKS-7 beta -Na2Si2O5, Natrosilit
  • Na-SKS-9 NaHSi2O5.H2O
  • Na-SKS-10 NaHSi2O5.3H2O, Kanemit
  • Na-SKS-11 t-Na2Si2O5
  • Na-SKS-13 NaHSi2O5
  • Na-SKS-6 delta -Na2Si2O5
  • silicates can comprise a content by weight of crystalline layered silicates of formula NaMSixO2x+1.yH2O of 0.1 to 20 wt. %, preferably about 0.2 to about 15 wt. % and particularly about 0.4 to about 10 wt. %, each based on the total weight of the corrosion inhibitor agent.
  • silicate(s) corrosion inhibitor is optional and can be omitted.
  • corrosion inhibitors can be suitable added to the solid alkaline composition of this invention 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 about 1,000 up to about 1,000, 000. These polymers have a molecular weight of about 100,000 or less and between about 1,000 and about 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.
  • the corrosion inhibitor can be used in quantities of about ⁇ 0 to about ⁇ 10, preferably about ⁇ 0.05 to about ⁇ 5, also preferred about ⁇ 0.1 to about ⁇ 3 and more preferred of about ⁇ 0.5 to about ⁇ 2; wherein the weight-% of the components are based on the total weight of the composition.
  • the solid alkaline composition according to the present invention can comprise at least one threshold inhibitor/crystal modifier.
  • the amount of threshold inhibitor/crystal modifier can be about ⁇ 1 wt.-% to about ⁇ 15 wt.-%, preferably about ⁇ 3 wt.-% to about ⁇ 12 wt.-%, further preferred about ⁇ 5 wt.-% to about ⁇ 16 wt.-%, and more preferred about ⁇ 6 wt.-% to about ⁇ 8 wt.-%, wherein the weight-% of the components are based on the total weight of the composition.
  • the threshold inhibitor/crystal modifier is 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 solid alkaline composition according to the present invention can comprise at least one sequestering agent.
  • the amount of sequestering agent can be about ⁇ 5 wt.-% to about ⁇ 40 wt.-%, preferably about ⁇ 10 wt.-% to about ⁇ 35 wt.-%, further preferred about ⁇ 20 wt.-% to about ⁇ 30 wt.-%, and more preferred about ⁇ 25 wt.-% to about ⁇ 28 wt.-%, wherein the weight-% of the components are based on the total weight of the composition.
  • the sequestering agent can be selected from the group of sodium gluconate, pentasodium salt of diethylenetriamine pentaacetic acid, sodium glucoheptonate, salts of ethylene diamine tetraacetic acid, salts of ethylene diamine tetraacetic acid, salts of hydroxyethyl ethylene diamine triacetic acid, salts of hydroxyethyl ethylene diamine triacetic acid, salts of nitrilotriacetic acid, salts of nitrilotriacetic acid, diethanolglycine sodium salt, ethanoldiglycine disodium salt, salts of hydroxymonocarboxylic acid compounds, salts of hydroxydicarboxylic acid compounds, salts of amine containing carboxylic acids, terasodium N,N-bis(carboxylatomethyl)-L-glutamate (GDLA) and mixtures thereof.
  • GDLA terasodium N,N-bis(carboxylatomethyl
  • At least one sequestering agent that exhibits soil removal properties when used at a pH of at least about 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 solid alkaline composition.
  • Exemplary sequestering agents that exhibit soil removal properties at a pH of greater than about 10.0 that can be used according to the invention include sodium gluconate, pentasodium salt of diethylenetriamine pentaacetic acid (available under the name Versenex 80), sodium glucoheptonate, ethylene diamine tetraacetic acid (EDTA), salts of ethylene diamine tetraacetic acid, hydroxyethyl ethylene diamine triacetic acid (HEDTA), salts of hydroxyethyl ethylene diamine triacetic acid, nitrilotriacetic acid (NTA), salts of nitrilotriacetic acid, diethanolglycine sodium salt (DEG), ethanoldiglycine disodium salt (EDG), tetrasodium N,N-bis(carboxylatomethyl)-L-glutamate (GLDA), methyl glycine diacetic acid (MGDA)and mixtures thereof.
  • EDTA ethylene diamine tetra
  • Exemplary salts of ethylene diamine tetraacetic acid include disodium salts, tetrasodium salts, diammonium salts, and trisodium salts.
  • An exemplary salt of hydroxyethyl ethylene diamine triacetic acid is the trisodium salt.
  • the sequestering agent can include mixtures of different sequestering agents.
  • Suitable solvents include, water, alcohols, glycols, glycol ethers, esters, or combinations thereof.
  • Suitable alcohols include, ethanol, isopropanol (propan-2-ol), 2-butoxy ethanol (butyl glycol), 1-decanol, benzyl alcohol, glycerin, monoethanolamine (MEA) or combinations thereof.
  • Suitable glycols include, 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, or combinations thereof.
  • MEG monoethylene glycol
  • DEG butoxy diglycol or DEG
  • TEG triethylene glycol
  • TETRA EG tetraethylene glycol
  • glycerin propylene glycol, dipropylene glycol, hexylene glycol, or combinations thereof.
  • the composition comprises at least two solvents and more preferred the composition comprises water and hexylene glycol.
  • the solid alkaline composition comprises:
  • the solid alkaline composition can comprise:
  • Another object of the present invention is directed to a liquid alkaline composition obtained from the solid alkaline composition of the invention.
  • 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 liquid composition that can be used to clean articles having a metal surface, such as surgical, medical, and dental instruments, including endoscopes.
  • the solution can be in the form of a concentrate that can be diluted with a solvent, such as 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 water
  • the solutions 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.
  • the concentrate liquid composition and/or the ready-to-use solution 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 the solvent, preferably water, are provided so that the concentrated, preferably aqueous, liquid composition of the solid alkaline composition according to the present invention may have a pH in the range of about 12 pH to about 14 pH, preferably a pH in the range of about 12.5 pH to about 13.5 pH and more preferred a pH of about 13 pH.
  • the weight ratio of the solvent, preferably water, to solid, to provide a concentrated liquid composition, preferably an aqueous solution, of the solid alkaline composition can be in the range of from about 200 : 1 to about 10 : 1, preferably about 100 : 1 to about 12 : 1, further preferred about 50 : 1 to about 15 : 1, also preferred about 40 : 1 to about 17 : 1 and in particular preferred about 30 : 1 to 20 : 1.
  • the alkaline concentrated liquid composition can comprise:
  • the alkaline concentrated liquid composition can comprise:
  • the source of alkalinity and addition of solvent, preferably water, are provided so that the aqueous ready-to-use solution of the solid alkaline composition according to the present invention may have a pH in the range of about ⁇ 10 pH to about ⁇ 11.5 pH and preferably a pH in the range of about ⁇ 10.5 pH to about ⁇ 11 pH.
  • the ratio of the solvent, preferably water, to solid, to provide a ready-to-use solution, preferably an aqueous solution, of the solid alkaline composition can be in the range of from about 5000 : 1 to about 100 : 1, preferably about 4000 : 1 to about 300 : 1, further preferred about 3000 : 1 to about 500 : 1, also preferred about 2500 : 1 to about 750 : 1 and in particular preferred about 2000 : 1 to about 1000 : 1.
  • the ready-to-use solution can comprise:
  • the ready-to-use solution can comprise:
  • the cleaning apparatus is used to clean and to disinfect articles having a metal surface, such as surgical, medical, and dental instruments.
  • the cleaning apparatus includes at least a first tank to receive the solid alkaline composition of the invention; at least a second component tank to receive water diluted concentrated composition or a ready-to-use solution of said solid alkaline composition of the invention, a water feed, and a use solution line; and optional a third component tank to receive a day portion of the concentrated composition or a ready-to-use solution of the invention.
  • the first component tank is provided for containing the solid alkaline composition of the invention.
  • the first component tank can be provided for mixing water to the solid alkaline composition to provide a concentrated liquid composition.
  • the solid alkaline composition can be mixed with water in a circulation method to obtain a defined alkaline aqueous concentrated liquid composition.
  • the second component tank is provided for receiving the aqueous concentrated liquid composition or for mixing water to the alkaline aqueous concentrated liquid composition to provide an alkaline ready-to-use solution.
  • the optional third component tank is provided for receiving a day portion of the aqueous concentrated liquid composition or for mixing water to the alkaline aqueous concentrated liquid composition to provide a day portion of an alkaline ready-to-use solution.
  • the water feed is provided for conveying water to the first tank, second tank (makeup tank) and/or third tank (day tank) for dissolving the solid alkaline composition (first tank) and/or for providing an aqueous concentrated alkaline liquid composition or alkaline ready-to-use solution (second tank) and/or for providing an aqueous alkaline ready-to-use solution (third tank).
  • the aqueous concentrated alkaline liquid composition is transferred to the day tank, by the time the defined concentration, pH, volume and/or temperature is reached.
  • the makeup tank (second tank) and more preferred the third tank (day tank) can be used to receive and stock the alkaline aqueous concentrated liquid composition or the ready-to-use solution. Most preferred is to provide the ready-to-use solution at the place of use, for example in an applicator, by adding sufficient water.
  • the aqueous concentrated alkaline liquid composition can be conveyed from the second tank or a day tank (optional third tank) to a dispenser and the dispenser sprays out the ready-to-use solution at the place of operation in a defined concentration.
  • the solution line is provided for conveying solution from the second container to a use solution applicator.
  • the solid alkaline composition of the invention can be used in combination with a healthcare solid dispenser.
  • This dispenser sprays out the solid alkaline composition of the invention having the form of a capsule in a circulation method to a defined concentration.
  • This alkaline aqueous concentrated liquid composition is collected in a makeup tank and transferred to a day tank as soon as the concentration and referring conductivity has reached the defined level. From there the pumps of the washer disinfectors dose the cleaning alkaline aqueous concentrated liquid composition in the cleaning cycle of the reprocessing step.
  • the solid can be diluted to a 5% alkaline aqueous concentrated liquid composition in the dispenser.
  • the ready-to-use solution or the concentrated liquid composition can be in any form including liquid, gel, paste and slurry.
  • the cleaning solutions i.e. ready-to-use solution and/or the concentrated liquid composition, 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 concentrated aqueous alkaline liquid composition, may be used at any temperature, including an elevated temperature of from about 30° C to about 70° C, preferably about 45° C to about 60° C and more preferred about 55° C. After contact with the cleaning solution, the solution is removed from the metal surface.
  • the contact time of the aqueous cleaning solution in an automated process, i.e. ready-to-use solution and/or the concentrated liquid composition, with the metal substrates will vary depending upon the degree of contamination but broadly will range between a few seconds or about ⁇ 1 minute to about ⁇ 30 minutes, with about ⁇ 3 minutes to about ⁇ 15 minutes being more typical and most preferred is about ⁇ 5 minutes to about ⁇ 10 minutes.
  • the cleaning apparatus may comprise:
  • the composition of the invention has a surprising cleaning efficacy due to none or practical none foam formation, if mixed with water, as sump solution or in the dispensing drawer.
  • alkaline concentrates were provided in a solid form: All components of table 1 and 2 are mixed together. Then the slurry is mixed and heated to temperature of about 80° C for about 30 minutes. Thereafter, the mixed slurry is casted and allows cooling to room temperature, whereby a casted alkaline solid is formed.
  • This test method provides a basis to assess the foam formation properties of the liquid alkaline cleaning composition of the invention.
  • An aqueous alkaline ready-to-use solution is formed, wherein 1.0 g of examples 1 to 14 and V1 to V7 are dissolved in 100 ml of deionized water each.
  • 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. This test was carried out at a temperature of the cleaning solution at ambient temperature, 20° C and 55° C.
  • the foam hight of about ⁇ 0 ml and about ⁇ 0.1 ml are considered to be excellent (++) and in line with the invention.
  • the foam hight of about ⁇ 0.1 ml to about ⁇ 5 ml are considered to be good (+) and in line with the invention.
  • the foam hight of about ⁇ 5 ml are considered to be insufficient (-) thus not in line with the invention, i.e. non-inventive.
  • the table 3 shows the result of the foam formation caused by the aqueous alkaline ready-to-use solution of examples E1 to E14 and V1 to V7 obtained by the foam formation test.
  • Table 3 Foam Formation Test-Results Exampels E1 ++ E8 ++ V1 - E2 ++ E9 ++ V2 - E3 ++ E10 ++ V3 - E4 ++ E11 ++ V4 - E5 + E12 + V5 - E6 + E13 + V6 - E7 + E14 + V7 -
  • 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 to E14 were diluted with deionized water to a 0.8 wt.-% ready-to-use solution.
  • the weights of 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 to E14 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. Three test were run for each experiment and the average weight loss was determined. The average weight loss for each aluminum test plates after treatment with said ready-to-use solution obtained from E1 to E14 were about ⁇ 0.34 wt.-%.
  • 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 and/or plastic surface can be as a metal and/or plastic 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.
  • the term “about” refers to variation in the numerical quantity that can occur, for example, through typical measuring and liquid handling procedures used for making concentrates or use solutions in the real world; through inadvertent error in these procedures; through differences in the manufacture, source, or purity of the ingredients used to make the compositions or carry out the methods; and the like.
  • the term “about” also encompasses amounts that differ due to different equilibrium conditions for a composition resulting from a particular initial mixture. Whether or not modified by the term “about”, the claims include equivalents to the quantities.

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Claims (14)

  1. Composition alcaline solide destinée au nettoyage, comprenant ≥ 10 % en poids à ≤ 50 % en poids d'au moins une source alcaline choisie dans le groupe constitué d'hydroxyde de sodium, d'hydroxyde de potassium et d'hydroxyde de lithium, ≥ 0,5 % en poids à ≤ 20 % en poids d'au moins un polyéthylène glycol, ≥ 2 % en poids à ≤ 10 % en poids d'au moins un inhibiteur de corrosion, et un solvant est ajouté à raison de 100 % en poids, le rapport pondéral de la source alcaline au polyéthylène glycol étant dans la plage de 20:1 à 2:1 et le % en poids des composants étant basé sur le poids total de la composition.
  2. Composition alcaline solide selon la revendication 1, dans laquelle le rapport pondéral de la source alcaline au polyéthylène glycol est dans la plage de 15:1 à 10:1.
  3. Composition alcaline solide selon les revendications 1 ou 2, comprenant :
    - ≥ 15 % en poids à ≤ 45 % en poids, de manière plus préférée
    ≥ 20 % en poids à ≤ 40 % en poids, et de manière encore plus préférée ≥ 25 % en poids à ≤ 35 % en poids, d'au moins une source alcaline choisie dans le groupe constitué d'hydroxyde de sodium, d'hydroxyde de potassium et d'hydroxyde de lithium ;
    ≥ 1 % en poids à ≤ 18 % en poids, de manière plus préférée ≥ 2 % en poids à ≤ 16 % en poids et de manière encore plus préférée ≥ 5 % en poids à ≤ 10 % en poids, d'au moins un polyéthylène glycol ; et
    - ≥ 3 % en poids à ≤ 9 % en poids, de manière plus préférée ≥ 4 % en poids à ≤ 8 % en poids et de manière encore plus préférée ≥ 5 % en poids à ≤ 6 % en poids d'au moins un inhibiteur de corrosion, de préférence l'inhibiteur de corrosion n'est pas un silicate ; le solvant étant de l'eau.
  4. Composition alcaline solide selon les revendications 1 à 3, dans laquelle la composition comprend un composant inhibiteur de seuil/modificateur cristallin choisi dans le groupe constitué de sels d'acides phosphonocarboxyliques, de phosphonates, de sels d'acide 1-hydroxyéthylidène-1,1-diphosphonique (HEDP), de sels de polymères substitués par un acide, et des mélanges de ceux-ci.
  5. Composition alcaline solide selon les revendications 1 à 4, dans laquelle la composition comprend au moins une composition d'agent séquestrant.
  6. Composition alcaline solide selon les revendications 1 à 5, dans laquelle la composition comprend au moins un inhibiteur de corrosion choisi dans le groupe comprenant du silicate, du silicate de sodium, de l'acétate de calcium, du chlorure de calcium, du gluconate de calcium, du phosphate de calcium, du borate de calcium, du carbonate de calcium, du citrate de calcium, du lactate de calcium, du sulfate de calcium, du tartrate de calcium, du benzotriazole, du 1,2,3-benzotriazole et des mélanges de ceux-ci.
  7. Composition alcaline solide selon les revendications 1 à 6, dans laquelle la composition comprend au moins un inhibiteur de seuil/modificateur cristallin choisi dans le groupe constitué de sels de polymères substitués par un acide de monomères d'acrylate, de méthacrylate, de sels d'acide polyitaconique, de sels d'acide polymaléique et des mélanges de ceux-ci.
  8. Composition alcaline solide selon les revendications 1 à 7, dans laquelle la composition comprend au moins une composition d'agent séquestrant choisie dans le groupe constitué de gluconate de sodium, de sel pentasodique d'acide diéthylènetriaminepentaacétique, de glucoheptonate de sodium, des sels d'acide éthylènediaminetétraacétique, des sels d'acide hydroxyéthyléthylènediaminetriacétique, des sels d'acide nitrilotriacétique, de sel du sodium de diéthanolglycine, de sel disodique éthanoldiglycine, des sels des composés d'acide hydroxymonocarboxylique, des sels des composés d'acide hydroxydicarboxylique, des sels d'acides carboxyliques contenant une amine, de terasodium N,N-bis(carboxylatomethyl)-L-glutamate et des mélanges de ceux-ci.
  9. Composition alcaline solide selon les revendications 1 à 8, dans laquelle la composition comprend au moins un solvant choisi dans le groupe constitué d'eau, d'alcools, de préférence d'alcools choisis parmi l'éthanol, l'isopropanol, le 2-butoxyéthanol, le 1-décanol, l'alcool benzylique, la glycérine, la monoéthanolamine, les glycols, de préférence les glycols choisis parmi l'éthylène glycol, le diéthylène glycol, le propylène glycol, le butoxy diglycol, le triéthylèneglycol, le tétraéthylèneglycol, la glycérine, le propylène glycol, le dipropylèneglycol, l'hexylèneglycol, les éthers glycoliques, les esters et des combinaisons de ceux-ci.
  10. Composition alcaline solide selon les revendications 1 à 9, comprenant :
    - ≥ 10 % en poids à ≤ 50 % en poids, de préférence ≥ 15 % en poids à ≤ 45 % en poids, de manière plus préférée ≥ 20 % en poids à ≤ 40 % en poids, et de manière encore plus préférée ≥ 25 % en poids à ≤ 35 % en poids, d'au moins une source alcaline choisie dans le groupe constitué d'hydroxyde de sodium, d'hydroxyde de potassium et d'hydroxyde de lithium ;
    - ≥ 0,5 % en poids à ≤ 20 % en poids, de préférence ≥ 1 % en poids à ≤ 18 % en poids, de manière plus préférée ≥ 2 % en poids à ≤ 16 % en poids, et de manière encore plus préférée ≥ 5 % en poids à ≤ 10 % en poids, d'au moins un polyéthylène glycol, de préférence un polyéthylène glycol dont la masse moléculaire est comprise entre 4 000 et 12 000 ;
    - ≥ 2 % en poids à ≤ 10 % en poids, de préférence ≥ 3 % en poids à ≤ 9 % en poids, de manière plus préférée ≥ 4 % en poids à ≤ 8 % en poids, et de manière encore plus préférée ≥ 5 % en poids à ≤ 6 % en poids d'au moins un inhibiteur de corrosion, de préférence l'inhibiteur de corrosion est un composé hétérocyclique et avec une préférence plus grande, un benzotriazol ;
    - ≥ 1 % en poids à ≤ 15 % en poids, de préférence ≥ 5 % en poids à ≤ 10 % en poids, et de manière encore plus préférée ≥ 6 % en poids à ≤ 8 % en poids d'au moins un inhibiteur de seuil/modificateur cristallin choisi dans le groupe constitué de sels d'acides phosphonocarboxyliques, de phosphonates, de sels d'acide 1-hydroxyéthylène-1,1-diphosphonique (HEDP), de sels de polymères substitués par un acide et des mélanges de ceux-ci, de préférence l'inhibiteur de seuil/modificateur cristallin est un sel d'acide polyacrylique ; et
    - ≥ 5 % en poids à ≤ 40 % en poids, de préférence ≥ 15 % en poids à ≤ 30 % en poids, et de manière encore plus préférée ≥ 25 % en poids à ≤ 28 % en poids d'au moins un agent séquestrant, l'agent séquestrant est de préférence un sel d'acide carboxylique contenant une aminé ; un solvant, de préférence de l'eau, est ajouté à raison de 100 % en poids ; dans laquelle le pourcentage en poids des composants est basé sur le poids total de la composition.
  11. Solution de composition alcaline solide selon les revendications 1 à 10.
  12. Solution selon la revendication 10, dans laquelle le rapport pondéral du solvant, de préférence de l'eau, au solide, pour fournir une composition liquide concentrée, de préférence une solution aqueuse, de la composition alcaline solide est dans la plage de 200:1 à 10:1, de préférence 100:1 à 12:1, de manière plus préférée 50:1 à 15:1, également de de manière préférée 40:1 à 17:1 et en particulier de manière préférée 30:1 à 20:1 ; ou le rapport du solvant, de préférence de l'eau, au solide, pour fournir une solution prête à l'emploi, de préférence une solution aqueuse, de la composition alcaline solide est dans la plage de 5 000:1 à 100:1, de préférence 4 000:1 à 300:1, de manière plus préférée 3 000:1 à 500:1, également de manière préférée 2 500:1 à 750:1 et en particulier de manière préférée 2 000:1 à 1 000:1.
  13. Utilisation de la solution selon les revendications 11 à 12 pour nettoyer des surfaces dures et souples, de préférence des objets métalliques et/ou plastiques, des surfaces métalliques et/ou des surfaces plastiques, avec une préférence encore plus grande des instruments métalliques, des instruments plastiques, des instruments dotés d'une surface plastique et/ou des instruments dotés d'une surface métallique.
  14. Utilisation de la solution selon la revendication 13 pour nettoyer des surfaces dures et souples, de préférence des objets métalliques et/ou plastiques, des surfaces métalliques et/ou des surfaces plastiques, avec une préférence encore plus grande des instruments métalliques, des instruments plastiques, des instruments dotés d'une surface plastique et/ou des instruments dotés d'une surface métallique, dans un traitement automatisé.
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EP2625257A1 (fr) 2013-08-14
WO2012045365A1 (fr) 2012-04-12

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