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EP3022280B1 - Nettoyeur d'instrument solide à alcalinité moyenne - Google Patents

Nettoyeur d'instrument solide à alcalinité moyenne Download PDF

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Publication number
EP3022280B1
EP3022280B1 EP13739990.3A EP13739990A EP3022280B1 EP 3022280 B1 EP3022280 B1 EP 3022280B1 EP 13739990 A EP13739990 A EP 13739990A EP 3022280 B1 EP3022280 B1 EP 3022280B1
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EP
European Patent Office
Prior art keywords
preferred
mild alkaline
salts
cleaning composition
acid
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.)
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Application number
EP13739990.3A
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German (de)
English (en)
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EP3022280A1 (fr
Inventor
Carola Stingl
Beana HÜSKEN
Sebastian NIEBUR
Laurence Geret
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Ecolab USA Inc
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Ecolab USA Inc
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Priority to PL13739990T priority Critical patent/PL3022280T3/pl
Publication of EP3022280A1 publication Critical patent/EP3022280A1/fr
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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
    • 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
    • C11D3/16—Organic compounds
    • C11D3/37—Polymers
    • C11D3/3703—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3707—Polyethers, e.g. polyalkyleneoxides
    • 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

Definitions

  • the invention relates to a mild alkaline solid cleaning composition, suitable for cleaning medical instruments, and methods for automated cleaning processing of surfaces with effective cleaning compositions.
  • the invention relates to mild alkaline solid 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.
  • WO 2012/045365 A1 refers to a solid of alkaline concentrated cleaning composition, a solution thereof and methods for automated cleaning processing of surfaces with effective cleaning compositions.
  • the solid alkaline composition for cleaning metal surfaces comprising at least one alkaline source, at least one polyethylene glycol and at least one corrosion inhibitor, wherein the ratio of alkaline source to polyethylene glycol is in the range from about 30 : 1 to about 2 : 1.
  • 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.
  • the object of the present invention is to provide a mild alkaline solid cleaning composition, suitable for automated cleaning processing of hard and/or soft surfaces, such as metal and/or plastic surfaces in accordance with claim 1, comprising:
  • the weight -% ratio of the alkaline source to the polyethylene glycol can be > 30 : 1 to > 3000 : 1, preferably > 31 : 1 to > 300 : 1, further preferred > 32 : 1 to > 100 : 1, and also preferred > 32.5 : 1 to > 35 : 1.
  • the mild alkaline solid cleaning composition of the invention is suitable for automated cleaning processing of hard and/or soft surfaces, such as metal and/or plastic surfaces, in particular metal instruments.
  • the mild alkaline solid cleaning composition comprises a very low content of polyethylene glycol and an increased amount of at least one corrosion inhibitor that makes it extremely sensitive to metal articles, metal surfaces, plastic articles and/or plastic surfaces.
  • the mild alkaline solid cleaning composition according to the invention may provide good cleaning performances even though the weight-% ratio of alkaline source to polyethylene glycol can be for example in the range from > 30 : 1 to ⁇ 3000 : 1, based on the total weight of the mild alkaline solid cleaning composition.
  • the weight-% ratio of alkaline source to polyethylene glycol can be in the range from > 30 : 1 to ⁇ 3000 : 1, preferably ⁇ 31 : 1 to ⁇ 300 : 1, further preferred ⁇ 32 : 1 to ⁇ 150 : 1, ⁇ 32 : 1 to ⁇ 100 : 1, ⁇ 32 : 1 to ⁇ 50 : 1, and also preferred ⁇ 32.5 : 1 to ⁇ 35 : 1, wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • 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 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 mild alkaline solid cleaning compositions.
  • references herein to a "solid" composition are to those, which are solid at 15° C and up to 60° C.
  • the mild alkaline solid cleaning composition of the present invention may be at 15° C and up to 60° C form stable and/or rigid.
  • a solvent preferably water, can be added add. 100 wt.-% to the mild alkaline solid cleaning composition of the invention.
  • the solvent content, such as the water content, of the mild alkaline solid cleaning composition according to the invention is simply determined by subtracting the amounts of all the usual components from 100 wt. %.
  • the weight-% (wt.-%) of the components are calculated based on the total weight amount of the mild alkaline solid cleaning composition, if not otherwise stated.
  • the ratio of components of the mild alkaline solid cleaning composition is parts by weight, if not otherwise stated.
  • the total amount of all components of the mild alkaline solid cleaning composition does not exceed 100 wt.-%.
  • the mild alkaline solid cleaning compositions are free of other surfactants, except polyethylene glycol.
  • mild alkaline solid cleaning compositions can be free of a hydrotrope component.
  • mild alkaline solid cleaning compositions can be free of a zeolite, except sodium disilicate.
  • the mild alkaline solid cleaning compositions 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 ratio or concentration of polyethylene glycol in the mild alkaline solid cleaning composition of the present invention is selected to high.
  • reducing the amount of polyethylene glycol to a very low content leads to an improper cleaning result. It has been surprisingly found that the insufficient cleaning characteristics due to the very low content of polyethylene glycol can be compensated and improved by increasing the amount of corrosion inhibitor.
  • the increased amount of corrosion inhibitor has a synergetic cleaning effect that allows to reduce the polyethylene glycol content.
  • the decrease content of polyethylene glycol reduces unwanted foam generation including the formation of micro bubbles to an absolute minimum, which improves disinfection of the surfaces to be cleaned.
  • the specific ratio of the at least one corrosion inhibitor to polyethylene glycol according to the present invention provides a good cleaning effect in combination with no visible foaming as required for an automated processing of metal articles, metal surfaces, plastic articles and/or plastic surfaces.
  • a mild alkaline solid cleaning composition of the present invention used in an automated washing process is surprisingly good, although the concentration of the polyethylene glycol in the mild alkaline solid cleaning composition of the present invention is extremely low due to the addition of an increased amount of at least one corrosion inhibitor.
  • An aqueous alkaline composition having a high pH are often more corrosive than an aqueous composition having a light acidic pH.
  • the concentrated liquid composition of the invention can have a pH in the range of ⁇ 12.5 pH to ⁇ 13.5 pH.
  • the pH of the ready-to-use aqueous alkaline solutions can be adjusted to a lower pH in the range of ⁇ 9.5 pH to ⁇ 11 pH.
  • the soil removal or cleaning action of an aqueous solution of the mild alkaline solid cleaning composition according to the present invention can be improved by adding at least one sequestering agent to the mild alkaline solid cleaning composition, preferably at least one sequestering agent that exhibits soil removal properties.
  • 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. concentrated liquid composition as well as the ready-to-use liquid mild alkaline cleaning 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 45 wt. %, 50 wt. % and 73 wt. % solution.
  • the mild alkaline solid cleaning composition comprises ⁇ 10 wt.-% to ⁇ 35 wt.-%, preferably ⁇ 13 wt.-% to ⁇ 24 wt.-%, and more preferred ⁇ 15 wt.-% to ⁇ 20 wt.-%, of at least one alkaline source, preferably sodium hydroxide; wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • a suitable polyethylene glycol for use in the present invention can have an average mol weight (MW) in the range of ⁇ 4000 to ⁇ 12000, preferably ⁇ 6000 to ⁇ 10000 and more preferred of ⁇ 7000 to ⁇ 8000.
  • Polyethylene glycol that can be used are marketed for example by BASF under the tradename PLURIOL®.
  • the mild alkaline solid cleaning composition comprises ⁇ 0.1 wt.-% to ⁇ 1 wt.-%, preferably ⁇ 0.2 wt.-% to ⁇ 0.8 wt.-%, further preferred ⁇ 0.3 wt.-% to ⁇ 0.7 wt.-%, and more preferred ⁇ 0.4 wt.-% to ⁇ 0.6 wt.-%, and most preferred 0.5 wt.-%, of at least one polyethylene glycol, preferably a polyethylene glycol with an average mol weight in the range of 4.000 to 12.000, and more preferred a polyethylene glycol having an average mol weight of 8,000; wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • At least one corrosion inhibitor preferably at least two corrosion inhibitors, in large amounts, are used to compensate the extreme low polyethylene glycol content of the composition in order to reach an excellent cleaning performance as well as to prevent the corrosion of an article to be cleaned.
  • silicate(s) corrosion inhibitor and more preferred a disilicate corrosion inhibitor can be used in the solid composition according to the present invention.
  • the silicate(s) and/or disilicate corrosion inhibitor can be an alkali silicate and/or alkali disilicate.
  • inhibitors that can be used can be selected from the group comprising 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 1.9 to 22, preferably 1.9 to 4 and y stands for a number from 0 to 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 0.2 to 15 wt. % and particularly 0.4 to 10 wt. %, each based on the total weight of the corrosion inhibitor agent.
  • corrosion inhibitors can be suitable added to the mild alkaline solid cleaning 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 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.
  • the mild alkaline solid cleaning composition comprises ⁇ 15 wt.-% to ⁇ 40 wt.-%, preferably ⁇ 18 wt.-% to ⁇ 35 wt.-%, further preferred ⁇ 20 wt.-% to ⁇ 28 wt.-%, and more preferred ⁇ 23 wt.-% to ⁇ 25 wt.-%, of at least one corrosion inhibitor, preferably sodium disilicate, and more preferred at least two corrosion inhibitors, preferably a benzotriazol and sodium disilicate and most preferred 1,2,3-benzotriazole and sodium disilicate; wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • the mild alkaline solid cleaning composition according to the present invention can comprise at least one threshold inhibitor/crystal modifier.
  • the threshold inhibitor/crystal modifier 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 amount of threshold inhibitor/crystal modifier can be ⁇ 0.5 wt.-% to ⁇ 15 wt.-%, preferably ⁇ 1 wt.-% to ⁇ 10 wt.-%, and more preferred ⁇ 3 wt.-% to ⁇ 5 wt.-% of at least one threshold inhibitor/crystal modifier, preferably the threshold inhibitor/crystal modifier is a salt of a polyacrylic acid; wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • the mild alkaline solid cleaning composition according to the present invention can comprise at least one sequestering agent.
  • 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, tetrasodium N,N-bis(carboxylatomethyl)-L-glutamate (GDLA) and mixtures thereof.
  • GDLA tetrasodium N,N-bis(carboxyla
  • 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 mild alkaline solid cleaning 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, 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 tetraace
  • 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.
  • the amount of sequestering agent can be ⁇ 5 wt.-% to ⁇ 40 wt.-%, preferably ⁇ 15 wt.-% to ⁇ 30 wt.-%, and more preferred ⁇ 20 wt.-% to ⁇ 25 wt.-% of at least one sequestering agent, preferably the sequestering agent is a salt of an amine containing carboxylic acid, and more preferred terasodium N,N-bis(carboxylatomethyl)-L-glutamate (GLDA); wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • the sequestering agent is a salt of an amine containing carboxylic acid, and more preferred terasodium N,N-bis(carboxylatomethyl)-L-glutamate (GLDA); wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • 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, isopropanol (propan-2-ol), 2-butoxy ethanol (butyl glycol), 1-decanol, benzyl alcohol, glycerin, monoethanolamine (MEA), and the like, or combinations 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.
  • MEG monoethylene glycol
  • DEG diethylene glycol
  • TEG triethylene glycol
  • TETRA EG tetraethylene glycol
  • glycerin propylene glycol, dipropylene glycol, hexylene glycol, and the like, or combinations thereof.
  • the composition comprises at least two solvents and more preferred the composition comprises water and hexylene glycol.
  • the amount of an additional solvent that is not water, preferably hexylene glycol can be ⁇ 0.1 wt.-% to ⁇ 5 wt.-%, preferably ⁇ 0.4 wt.-% to ⁇ 1 wt.-%, and more preferred ⁇ 0.6 wt.-% to ⁇ 0.8 wt.-%; wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • Water can be added add 100 wt.-%; wherein the weight-% of the components are based on the total weight of the mild alkaline solid cleaning composition.
  • the mild alkaline solid cleaning composition may comprise:
  • the mild alkaline solid cleaning composition may comprise:
  • Another object of the present invention is directed to a liquid mild alkaline cleaning composition obtained from the mild alkaline solid cleaning 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 liquid mild alkaline cleaning solution.
  • the ready-to-use liquid mild alkaline cleaning solution can be directly used to clean articles and need not to be diluted.
  • the ready-to-use liquid composition according to the invention may 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 liquid mild alkaline cleaning 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 liquid mild alkaline cleaning solution can be used in an automated washing process for cleaning and disinfection metal and plastic 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 mild alkaline solid cleaning composition according to the present invention may have a pH in the range of 12 pH to 14 pH, preferably a pH in the range of 12.5 pH to 13.5 pH and more preferred a pH of 13 pH.
  • the ratio of the solvent, preferably water, to solid, to provide a concentrated liquid composition, preferably an aqueous solution, of the mild alkaline solid cleaning composition can be in the range of from 200 : 1 to 10 : 1, preferably 100 : 1 to 12 : 1, further preferred 50 : 1 to 15 : 1, also preferred 40 : 1 to 17 : 1 and in particular preferred 30 : 1 to 20 : 1.
  • the alkaline concentrated liquid composition can comprise:
  • the mild alkaline solid cleaning composition can comprise:
  • the source of alkalinity and addition of solvent, preferably water, are provided so that the aqueous ready-to-use liquid mild alkaline cleaning solution according to the present invention may have a pH in the range of ⁇ 9.5 pH to ⁇ 11.5 pH and preferably a pH in the range of ⁇ 10.0 pH to ⁇ 11 pH.
  • the ratio of the solvent, preferably water, to solid, to provide a ready-to-use liquid mild alkaline cleaning solution, preferably an aqueous solution, of the mild alkaline solid cleaning composition can be in the range of from 60,000 : 1 to 100 : 1, preferably 30,000 : 1 to 300 : 1, further preferred 10,000 : 1 to 500 : 1, also preferred 5,000 : 1 to 750 : 1 and in particular preferred 2,500 : 1 to 1,000 : 1.
  • the ready-to-use liquid mild alkaline cleaning solution can comprise:
  • the ready-to-use liquid mild alkaline cleaning solution can comprise:
  • all components of the mild alkaline solid cleaning composition can be mixed together or added portionwise or one after the other.
  • a cast process then solidifies the heated slurry, e.g. the solidification can erupt after cooling down a NaOH melt by crystallization.
  • a 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 mild alkaline solid cleaning composition of the invention; at least a second component tank to receive water diluted concentrated composition or a ready-to-use liquid mild alkaline cleaning solution of said mild alkaline solid cleaning 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 liquid mild alkaline cleaning solution of the invention.
  • the first component tank is provided for containing the mild alkaline solid cleaning composition of the invention.
  • the first component tank can be provided for mixing water to the mild alkaline solid cleaning composition to provide a concentrated liquid composition.
  • the mild alkaline solid cleaning 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 a ready-to-use liquid mild alkaline cleaning 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 a ready-to-use liquid mild alkaline cleaning 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 mild alkaline solid cleaning composition (first tank) and/or for providing an aqueous concentrated alkaline liquid composition or a ready-to-use liquid mild alkaline cleaning solution (second tank) and/or for providing an aqueous ready-to-use liquid mild alkaline cleaning solution (third tank).
  • first tank the aqueous concentrated alkaline liquid composition
  • second tank ready-to-use liquid mild alkaline cleaning solution
  • third tank aqueous ready-to-use liquid mild alkaline cleaning solution
  • 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 liquid mild alkaline cleaning solution. Most preferred is to provide the ready-to-use liquid mild alkaline cleaning 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 liquid mild alkaline cleaning 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 mild alkaline solid cleaning composition of the invention can be used in combination with a healthcare solid dispenser.
  • This dispenser sprays out the mild alkaline solid cleaning 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 liquid mild alkaline cleaning 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 liquid mild alkaline cleaning 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 liquid mild alkaline cleaning solution and/or the concentrated aqueous alkaline liquid composition, may be used at any temperature, including an elevated temperature of from 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 or plastic surface.
  • the contact time of the aqueous cleaning solution in an automated process i.e. ready-to-use liquid mild alkaline cleaning 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 ⁇ 1 minute to ⁇ 30 minutes, with ⁇ 3 minutes to ⁇ 15 minutes being more typical and most preferred is ⁇ 5 minutes to ⁇ 10 minutes.
  • the cleaning apparatus may comprise:
  • the composition of the invention has a surprising cleaning efficacy due to none foam formation, if mixed with water, as sump solution or in the dispensing drawer.
  • 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.
  • 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.
  • 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.
  • 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 80° C for 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 ready-to-use liquid mild alkaline cleaning solution is formed, wherein 1.0 g of examples E1 to E7 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 height are given in ml.
  • the table 2 shows the result of the foam formation caused by the aqueous ready-to-use liquid mild alkaline cleaning solution of examples E1 to E7 obtained by the foam formation test.
  • Table 2 Foam Formation Test-Results Exampels ml E1 0 E2 0 E3 0 E4 0 E5 0 E6 0 E7 0
  • 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 E7 and comparative compositions V1 to V14 were diluted with deionized water to a 0.8 wt.-% ready-to-use liquid mild alkaline cleaning 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 liquid mild alkaline cleaning solution E1 to E7 and V1 to V14 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. 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 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.
  • An aqueous ready-to-use liquid mild alkaline cleaning solution is formed, wherein 1.0 g of examples E1 to E7 and V1 to V14 are dissolved in 100 ml of deionized water each.
  • compositions E1 to E7 compared to V1 to V14 were tested in an automatic metal instrument cleaning apparatus Miele G 7836 CD, Program DES-VAR-TD, 55 °C, 10 minutes.
  • 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. All publications and patent applications in this specification are indicative of the level of ordinary skill in the art to which this invention pertains. The invention has been described to various specific and preferred embodiments and techniques.

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Claims (14)

  1. Composition solide de nettoyage à alcalinité moyenne comprenant :
    - ≥ 10 % en poids à ≤ 35 % en poids d'au moins une source alcaline,
    - ≥ 0,1 % en poids à ≤ 1 % en poids d'au moins un polyéthylène glycol, et
    - ≥ 15 % en poids à ≤ 40 % en poids d'au moins un inhibiteur de corrosion ;
    dans laquelle le rapport pondéral en % de la source alcaline au polyéthylène glycol est > 30 : 1 ; et le % en poids des composants étant basé sur le poids total de la composition solide de nettoyage à alcalinité moyenne.
  2. Composition solide de nettoyage à alcalinité moyenne selon la revendication 1, dans laquelle la composition comprend au moins deux inhibiteurs de corrosion, de préférence ≥ 16 % en poids de disilicate de sodium et ≥ 4 % en poids d'un benzotriazole ; dans laquelle le % en poids des composants est basé sur le poids total de la composition solide de nettoyage à alcalinité moyenne.
  3. Composition solide de nettoyage à alcalinité moyenne selon la revendication 1 ou 2, comprenant :
    - ≥ 10 % en poids à ≤ 35 % en poids, de préférence ≥ 13 % en poids à ≤ 24 % en poids et mieux encore ≥ 15 % en poids à ≤ 20 % en poids, d'au moins une source alcaline, de préférence d'hydroxyde de sodium ;
    - ≥ 0,1 % en poids à ≤ 1 % en poids, de préférence ≥ 0,2 % en poids à ≤ 0,8 % en poids, de préférence encore ≥ 0,3 % en poids à ≤ 0,7 % en poids, et mieux encore ≥ 0,4 % en poids à ≤ 0,6 % en poids, et tout particulièrement 0,5 % en poids, d'au moins un polyéthylène glycol, de préférence un polyéthylène glycol ayant une masse moléculaire moyenne dans la plage de 4 000 à 12 000, et mieux encore un polyéthylène glycol ayant une masse moléculaire moyenne de 8 000 ; et
    - ≥ 15 % en poids à ≤ 40 % en poids, de préférence ≥ 18 % en poids à ≤ 35 % en poids, de préférence encore ≥ 20 % en poids à ≤ 28 % en poids et mieux encore ≥ 23 % en poids à ≤ 25 % en poids, d'au moins un inhibiteur de corrosion, de préférence de disilicate de sodium, et mieux encore d'au moins deux inhibiteurs de corrosion, de préférence un benzotriazole et du disilicate de sodium ;
    - un solvant, de préférence de l'eau, est ajouté jusqu'à 100 % en poids ; le % en poids des composants étant basé sur le poids total de la composition solide de nettoyage à alcalinité moyenne.
  4. Composition solide de nettoyage à alcalinité moyenne selon les revendications 1 à 3, dans laquelle la composition comprend au moins une source alcaline choisie dans le groupe constitué de l'hydroxyde de sodium, du carbonate de sodium, de l'hydroxyde de potassium et de l'hydroxyde de lithium.
  5. Composition solide de nettoyage à alcalinité moyenne selon les revendications 1 à 4, dans laquelle la composition comprend au moins un, de préférence deux inhibiteurs de corrosion choisis dans le groupe comprenant un silicate, le silicate de sodium, le disilicate de sodium, l'acétate de calcium, le chlorure de calcium, le gluconate de calcium, le phosphate de calcium, le borate de calcium, le carbonate de calcium, le citrate de calcium, le lactate de calcium, le sulfate de calcium, le tartrate de calcium, le benzotriazole, le 1,2,3-benzotriazole, et des mélanges de ceux-ci.
  6. Composition solide de nettoyage à alcalinité moyenne selon les revendications 1 à 5, dans laquelle la composition comprend au moins un inhibiteur de seuil/modificateur cristallin choisi dans le groupe comprenant des sels d'acides phosphonocarboxyliques, des phosphonates, des sels d'acide 1-hydroxyéthylidène-1,1-diphosphonique (HEDP), des sels de polymères substitués d'acides et des mélanges de ceux-ci, de préférence des sels de polymères substitués d'acides de monomères d'acrylate, de méthacrylate, des sels de poly(acide itaconique), des sels de poly(acide maléique), et des mélanges de ceux-ci.
  7. Composition solide de nettoyage à alcalinité moyenne selon les revendications 1 à 6, dans laquelle la composition comprend au moins une composition d'agent séquestrant choisie dans le groupe constitué du gluconate de sodium, d'un sel pentasodique d'acide diéthylènetriamine pentaacétique, du glucoheptonate de sodium, des sels d'acide éthylènediamine tétraacétique, des sels d'acide hydroxyéthyléthylène diamine triacétique, des sels d'acide nitrilotriacétique, d'un sel sodique de diéthanolglycine, d'un sel disodique d'éthanoldiglycine, des sels de composés d'acide hydroxymonocarboxylique, des sels de composés d'acide hydroxydicarboxylique, des sels d'acides carboxyliques contenant une amine, du N,N-bis(carboxylatométhyl)-L-glutamate tétrasodique (GLDA) et des mélanges deux ceux-ci.
  8. Composition solide de nettoyage à alcalinité moyenne selon les revendications 1 à 7, dans laquelle la composition comprend au moins un solvant choisi dans le groupe comprenant de l'eau, des alcools, de l'éthanol, de l'isopropanol, du 2-butoxyéthanol, du 1-décanol, de l'alcool benzylique, de la glycérine, de la monoéthanolamine, des glycols, de l'éthylène glycol, du diéthylène glycol, du propylène glycol, du butoxydiglycol, du triéthylène glycol, du tétraéthylène glycol, du dipropylène glycol, de l'hexylène glycol, des glycoléthers, des esters ou des combinaisons de ceux-ci. Des alcools convenables englobent, mais sans s'y limiter, l'éthanol, l'isopropanol, le 2-butoxyéthanol, le 1-décanol, l'alcool benzylique, la glycérine, la monoéthanolamine, ou des combinaisons de ceux-ci ; de préférence la composition comprend au moins deux solvants et mieux encore la composition comprend de l'eau et de l'hexylène glycol.
  9. Composition solide de nettoyage à alcalinité moyenne selon les revendications 1 à 8, comprenant :
    - ≥ 10 % en poids à ≤ 35 % en poids, de préférence ≥ 13 % en poids à ≤ 24 % en poids et mieux encore ≥ 15 % en poids à ≤ 20 % en poids, d'au moins une source alcaline, de préférence d'hydroxyde de sodium ;
    - ≥ 0,1 % en poids à ≤ 1 % en poids, de préférence ≥ 0,2 % en poids à ≤ 0,8 % en poids, de préférence encore ≥ 0,3 % en poids à ≤ 0,7 % en poids, et mieux encore ≥ 0,4 % en poids à ≤ 0,6 % en poids, et tout particulièrement 0,5 % en poids, d'au moins un polyéthylène glycol, de préférence un polyéthylène glycol ayant une masse moléculaire moyenne dans la plage de 4 000 à 12 000, et mieux encore un polyéthylène glycol ayant une masse moléculaire moyenne de 8 000 ; et
    - ≥ 15 % en poids à ≤ 40 % en poids, de préférence ≥ 18 % en poids à ≤ 35 % en poids, de préférence encore ≥ 20 % en poids à ≤ 28 % en poids et mieux encore ≥ 23 % en poids à ≤ 25 % en poids, d'au moins un inhibiteur de corrosion, de préférence de disilicate de sodium, et mieux encore d'au moins deux inhibiteurs de corrosion, de préférence un benzotriazole et du disilicate de sodium ;
    - ≥ 0,5 % en poids à ≤ 15 % en poids, de préférence ≥ 1 % en poids à ≤ 10 % en poids, et mieux encore ≥ 3 % en poids à ≤ 5 % en poids d'au moins un inhibiteur de seuil/modificateur cristallin, de préférence l'inhibiteur de seuil/modificateur cristallin est un sel d'un poly(acide acrylique) ;
    - ≥ 5 % en poids à ≤ 40 % en poids, de préférence ≥ 15 % en poids à ≤ 30 % en poids, et mieux encore ≥ 20 % en poids à ≤ 25 % en poids d'au moins un agent séquestrant, de préférence l'agent séquestrant est un sel d'un acide carboxylique contenant une amine, et mieux encore de N,N-bis(carboxylatométhyl)-L-glutamate tétrasodique (GLDA) ;
    - un solvant, de préférence de l'eau, est ajouté jusqu'à 100 % en poids ; le % en poids des composants étant basé sur le poids total de la composition solide de nettoyage à alcalinité moyenne.
  10. Solution de la composition solide de nettoyage à alcalinité moyenne selon les revendications 1 à 9.
  11. Solution selon la revendication 10, dans laquelle la solution est une composition liquide concentrée ou une solution liquide de nettoyage à alcalinité moyenne prête à l'emploi.
  12. Solution selon la revendication 10 ou 11, dans laquelle le rapport du solvant, de préférence l'eau, au solide, pour fournir une composition liquide concentrée, de préférence une solution aqueuse, de la composition solide de nettoyage à alcalinité moyenne est dans la plage de 200:1 à 10:1, de préférence de 100:1 à 12:1, de préférence encore de 50:1 à 15:1, également de préférence de 40:1 à 17:1 et tout particulièrement de 30:1 à 20:1, ou
    le rapport du solvant, de préférence l'eau, au solide, pour fournir une solution liquide de nettoyage à alcalinité moyenne prête à l'emploi, de préférence une solution aqueuse, de la composition solide de nettoyage à alcalinité moyenne est dans la plage de 60 000:1 à 100:1, de préférence de 30 000:1 à 300:1, de préférence encore de 10 000:1 à 500:1, également de préférence de 5 000:1 à 750:1 et tout particulièrement de 2 500:1 à 1 000:1.
  13. Utilisation de la solution selon les revendications 10 à 12 pour nettoyer des surfaces dures et molles, de préférence des articles en métal et/ou en plastique, des surfaces en métal et/ou des surfaces en plastique, mieux encore des instruments en métal, des instruments en plastique, des instruments avec une surface en plastique et/ou des instruments avec une surface en métal.
  14. Utilisation de la solution selon la revendication 13 pour nettoyer des surfaces dures et molles, de préférence des articles en métal et/ou en plastique, des surfaces en métal et/ou des surfaces en plastique, mieux encore des instruments en métal, des instruments en plastique, des instruments avec une surface en plastique, des instruments avec une surface en métal et/ou des instruments chirurgicaux, dans une opération automatisée.
EP13739990.3A 2013-07-19 2013-07-19 Nettoyeur d'instrument solide à alcalinité moyenne Active EP3022280B1 (fr)

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PL13739990T PL3022280T3 (pl) 2013-07-19 2013-07-19 Łagodny, alkaliczny, stały środek do czyszczenia narzędzi

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PCT/EP2013/065351 WO2015007347A1 (fr) 2013-07-19 2013-07-19 Nettoyeur d'instrument solide à alcalinité moyenne

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EP3394234B1 (fr) * 2015-12-22 2019-10-09 Basf Se Composition de nettoyage post-polissage mécano-chimique
CN115418644B (zh) * 2022-10-10 2024-03-26 湖南金裕环保科技有限公司 缓蚀剂、制备方法及其在水基清洗剂中的应用

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ES2155613T3 (es) * 1995-07-13 2001-05-16 Reckitt Benckiser Nv Producto en forma de tableta para lavavajillas.
US5756444A (en) * 1996-11-01 1998-05-26 The Procter & Gamble Company Granular laundry detergent compositions which are substantially free of phosphate and aluminosilicate builders
DE19758262A1 (de) * 1997-12-31 1999-07-08 Henkel Kgaa Alkylaminotriazolhaltige, granulare Komponente für den Einsatz in Maschinengeschirrspülmitteln (MGSM) und Verfahren zu dessen Herstellung
JP2004502831A (ja) * 2000-06-30 2004-01-29 ザ、プロクター、エンド、ギャンブル、カンパニー シクロデキストリングルカノトランスフェラーゼ酵素を含む洗剤組成物
DE10313454A1 (de) * 2003-03-25 2004-10-21 Henkel Kgaa Wasch- oder Reinigungsmittel
US20080096784A1 (en) * 2006-05-15 2008-04-24 Voco Gmbh Composition for Cleaning Dental Instruments and Process
GB0616444D0 (en) * 2006-08-18 2006-09-27 Reckitt Benckiser Nv Detergent composition
WO2012045365A1 (fr) * 2010-10-08 2012-04-12 Ecolab Inc. Efficacité de nettoyage d'une matière solide sans danger pour les métaux pour le traitement automatisé d'instruments

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EP3022280A1 (fr) 2016-05-25
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