WO2006114243A1

WO2006114243A1 - Improved bacterial suspension performance

Info

Publication number: WO2006114243A1
Application number: PCT/EP2006/003682
Authority: WO
Inventors: Stefan Karsten; Maike Janssen
Original assignee: Henkel Kommanditgesellschaft Auf Aktien
Priority date: 2005-04-26
Filing date: 2006-04-21
Publication date: 2006-11-02
Also published as: EP1879993A1; DE102005019658A1

Abstract

An aqueous disinfectant contains a combination of benzalkonium chloride, phenoxyethanol and aminotrimethylene phosphonic acid, and can be used in a corresponding method for disinfecting hard surfaces.

Description

"Improved Bacterial Suspension Performance"

Disinfectants or bactericidal cleaners of the prior art are often based on benzalkonium chlorides. To achieve a good bactericidal performance, however, active contents of benzalkonium chlorides of about 0.4% are required. Cleaning agents for hard surfaces, in particular for the sanitary sector, are usually formulated as acidic cleaning agents, in order to effect not only the cleaning action but also the most effective removal of lime deposits. On the other hand, benzalkonium chlorides have their optimum effect and stability in formulations with pH values between 6 and 9. Leaving this pH optimum leads to deficits in the spectrum of action, rate of action and active ingredient stability. Although these deficits could be at least partially compensated by increasing the active content, which is problematic from a toxicological, ecological and dermatological point of view. Furthermore, there are disadvantages in terms of residue behavior, banding and film formation / matting on surfaces from an application point of view. Benzalkonium chlorides generally have a weakness of gram negative probes such as e.g. of the species Pseudomonas aeruginosa. In addition, the germicidal property significantly decreases in case of contamination. The performance of pure benzalkonium chloride-based cleaner therefore varies with the degree of contamination of the surface.

It has therefore been desired to develop a cleanser formulation which has good antibacterial performance against various germs in both acidic and alkaline environments and also under soil stress.

It has been found that by using an active substance combination of benzalkonium chloride, phenoxyethanol and ATMP, the disinfecting performance, disinfection rate and pH selectivity with respect to benzalkonium chloride alone can be significantly increased. Due to this synergistic supplementation, the content of benzalkonium chloride can also be significantly reduced, which leads to an improved absence of residues / streaks. While benzalkonium chloride and phenoxyethanol have already been used as antimicrobial agents or preservatives, such an effect and above all a synergism in connection with aminotrimethylenephosphonic acid has hitherto not been reported. The subject of the present application is therefore an aqueous disinfectant which comprises a combination of benzalkonium chloride, phenoxyethanol and aminotrimethyl-enphosphonic acid.

It has been found that the combination of these three active ingredients in a disinfectant can be used to increase the disinfecting performance. A second object of the invention is therefore the use of a combination of benzalkonium chloride, phenoxyethanol and aminotrimethylenephosphonic acid in an aqueous disinfectant to increase the cleaning performance.

With this aqueous disinfectant hard surfaces can be cleaned and / or disinfected. Accordingly, a third subject of this application is the use of an aqueous disinfectant comprising a combination of benzalkonium chloride, phenoxyethanol and aminotrimethylenephosphonic acid for cleaning and / or disinfecting hard surfaces. A fourth object is a method for cleaning and / or disinfecting hard surfaces, which uses an aqueous disinfectant comprising a combination of benzalkonium chloride, phenoxyethanol and aminotrimethylenephosphonic acid.

In addition to the ingredients mentioned, the disinfectant according to the invention may contain further customary ingredients which can be used in cleaning and disinfecting agents for hard surfaces. For this purpose, in particular surfactants, film formers, thickeners, acids, solvents, antimicrobial agents and other ingredients such as builder components, alkalis, preservatives, enzymes, excipients, fragrances or dyes are calculated.

Substances which also serve as ingredients of cosmetic products are referred to below, where appropriate, according to the International Nomenclature Cosmetic Ingredient (INCI) nomenclature. Chemical compounds carry an INCI name in English, plant ingredients are listed only after Linne in Latin, so-called trivial names such as "water", "honey" or "sea salt" are also given in Latin. The INCI names can be found in the International Cosmetic Ingredient Dictionary and Handbook - Seventh Edition (1997), published by The Cosmetic, Toiletry, and Fragrance Association (CTFA), 1101 17th Street, NW, Suite 300, Washington, DC, 20036, USA, and contains more than 9,000 INCI names, as well as references to more than 37,000 trade names and technical names, including related distributors, from over 31 countries. The International Cosmetic Ingredient Dictionary and Handbook assigns to the ingredients one or more chemical classes, such as polymer ethers, and one or more functions, such as surfactants-cleansing agents, which are further explained and discussed below possibly also referred to.

The indication CAS means that the following sequence of numbers is a name of the Chemical Abstracts Service.

The terms disinfection, sanitation, antimicrobial action and antimicrobial agent have the usual meaning in the context of the teaching of the invention, for example, by KH Wallhäußer in "Practice of sterilization, disinfection - Conservation: germ identification - company hygiene" (5th ed. - Stuttgart, New York : Thieme, 1995). While disinfection in the narrower sense of the medical practice means the killing of - in theory all - infectious germs, sanitation is to be understood as the greatest possible elimination of all - including the saprophytic - normally harmless to humans saprophytic - germs. Here, the extent of disinfection or sanitation depends on the antimicrobial effect of the applied agent, which decreases with decreasing content of antimicrobial agent or increasing dilution of the agent for use.

Benzalkonium chlorides or alkylbenzyldimethylammonium chlorides (INCI: Benzalkonium Chloride) with a Cβ-iβ-alkyl radical can, like all quaternary ammonium compounds, be prepared by reacting a tertiary amine with an alkylating agent, here benzyl chloride. They have cationic surfactant properties. Above all, they are characterized by their bactericidal action, which can develop optimally in formulations with a pH of 6 to 9. They are available, for example under the trade names Acetide ^® (Thor Bioeides) Barquat ^® (Lonza), Empigen ^® (Huntsman) or Rewoquat ^® (Witco). Aqueous disinfectants according to the present invention contain benzalkonium chlorides in amounts of 0.005 to 10 wt .-%, preferably 0.05 to 5 wt .-%, particularly preferably 0.1 to 2 wt .-%, in particular 0.15 to 0.8 wt .-%. Phenoxyethanol, also known as ethylene glycol monophenyl ether or phenyl glycol, can serve, for example, as a solvent, but is also used, inter alia, in cosmetics as a preservative. It is for example 10 (Goldschmidt) commercially available under the trade names Dowanol EPh ^® (Dow Chemical), phenoxetol ^® (Clariant) or ^® Rewopal MPG. Phenoxyethanol is used in amounts of from 0.01 to 30% by weight, preferably from 0.25 to 25% by weight, particularly preferably from 0.5 to 10% by weight, in the disinfectants according to the invention.

Aminotrimethylenephosphonic acid (ATMP), like many other phosphonates, can complex metal ions, for example calcium, magnesium or else heavy metal ions. In addition, it also has a corrosion-inhibiting action. ATMP can be obtained, inter alia, under the trade names Dequest ^® 2000 (Solutia), Turpinal ^® D2 (Cognis) or Briquest 301 ^® 50A (Rhodia). Aqueous disinfectants according to the present invention contain 0.01 to 10 wt .-% Aminotrimethylenphosphonsäure, preferably 0.05 to 5 wt .-%, particularly preferably 0.1 to 3 wt .-%.

The agent according to the invention contains benzalkonium chloride, phenoxyethanol and aminotrimethylenephosphonic acid in a mass ratio of 0.07-1.3: 3-7: 0.07-1.3.

surfactants

The agent according to the invention can furthermore also contain surface-active substances. Suitable surface-active substances for the agents according to the invention are surfactants, in particular from the classes of nonionic, cationic and amphoteric surfactants. On the other hand, anionic surfactants are less preferred since they can interact with the benzalkonium chloride and are therefore included only in amounts of up to 0.1% by weight. In a preferred embodiment, however, the agent is free of anionic surfactants.

Preferably, the agents contain nonionic surfactants. The amount of nonionic surfactant is usually not more than 10 wt .-%, preferably between 0.5 and 7 wt .-%, in particular between 1 and 6 wt .-%. If the compositions contain cationic and / or amphoteric surfactants, their concentration in ready-to-use agents is usually not more than 3% by weight, preferably in each case between 0.001 and 2% by weight. It has furthermore proven particularly advantageous if the total surfactant content in the composition according to the invention is not more than 6% by weight. As nonionic surfactants are especially Cβ Ciβ alcohol polyglycol, ie ethoxylated and / or propoxylated alcohols having 8 to 18 carbon atoms in the alkyl moiety and 2 to 15 ethylene oxide (EO) and / or propylene oxide (PO), Cβ-C ^ -Carbonsäurepolyglykolester with 2 to 15 EO, for example, tallow fatty acid + 6-EO ester, ethoxylated fatty acid amides having 12 to 18 carbon atoms in the fatty acid portion and 2 to 8 EO ₁ long-chain amine oxides having 14 to 20 carbon atoms and long-chain Alylpolyglycoside with 8 bis 14 carbon atoms in the alkyl moiety and 1 to 3 glycoside units to mention. Examples of such surfactants are oleyl-cetyl-alcohol with 5 EO, nonylphenol with 10 EO, lauric acid diethanolamide, Kokosalkyldimethylaminoxid and Kokosalkylpolyglucosid with an average of 1, 4 glucose units. Particular preference is given to using Cβ-iβ fatty alcohol polyglycol ethers having in particular 2 to 8 EO, and Cβ-io-alkylpolyglucosides having 1 to 2 glycoside units.

Particularly preferred nonionic surfactants are alkylpolyglycosides (APG) of the formula I ₁ RO [G] _x in which R is a linear or branched, saturated or unsaturated alkyl radical having 8 to 22 carbon atoms, [G] is a glycosidically linked sugar radical and x stand for a number from 1 to 10. APG are nonionic surfactants and are known substances that can be obtained by the relevant methods of preparative organic chemistry. The index number x in the general formula I indicates the degree of oligomerization (DP degree), ie the distribution of mono- and oligoglycosides, and stands for a number between 1 and 10. While x in a given compound must always be an integer, and Here, especially the values x = 1 to 6 can assume, the value x for a given alkyl glycoside is an analytically determined arithmetical variable, which usually represents a fractional number. Preferably, alkyl glycosides having a mean degree of oligomerization x of 1.1 to 3.0 are used. From an application point of view, those alkyl glycosides whose degree of oligomerization is less than 1.7 and in particular between 1.2 and 1.6 are preferred. The glycosidic sugar used is preferably xylose, but especially glucose. According to applicable Alkylpolyglykoside are offered, for example, under the trade name Plantaren® ^®, eg Plantaren® ^® 700 by Cognis.

The alkyl or alkenyl radical R (formula I) can be derived from primary alcohols having 8 to 18, preferably 8 to 14, in particular 8 to 10, carbon atoms. Typical examples are caproic alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and the like technical mixtures, as obtained for example in the course of the hydrogenation of technical fatty acid methyl esters or in the course of the hydrogenation of aldehydes from the ROELEN's oxo synthesis. Also to be mentioned are lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachidyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and technical mixtures thereof.

C ₈ -C provide ₈ -Alkylalkoholpolypropylenglykol / polyethylene Another preferred nonionic surfactants are known. They may be described by the formula II, RO- (CH ₂ CH (CH ₃₎ O) _P (CH ₂ CH ₂ O) ₆ -H, in which R is a linear or branched, aliphatic alkyl and / or alkenyl radical having 8 to 18 carbon atoms, p is 0 or numbers from 1 to 3 and e is numbers from 1 to 20.

The C 1 -C 4 -alkyl alcohol polyglycol ethers of the formula II can be obtained by addition of propylene oxide and / or ethylene oxide to alkyl alcohols, preferably to fatty alcohols. Typical examples are polyglycol ethers of the formula I in which R is an alkyl radical having 8 to 18 carbon atoms, p is 0 to 2 and e is a number from 2 to 7. A preferred representative is, for example, C ₁₂ -C ₁₄ fatty alcohol + 4EO ether (p = O, e = 4). Preferred fatty alcohol ethoxylates can be purchased, for example Dehydol LS4, for example, under the trade name Dehydol ^® (Cognis).

It is also possible to use end-capped C ₈ -C ₁₈ -alkyl alcohol polyglycol ethers, ie compounds in which the free OH group in the formula II has been etherified. The end-capped C ₈ -C ₈ alkyl alcohol polyglycol ethers can of preparative organic chemistry are obtained by relevant methods. Preferably, C ₈ -C ₁₈ alkyl alcohol polyglycol ethers are reacted in the presence of bases with alkyl halides, in particular butyl or benzyl chloride. Typical examples are mixed ethers of the formula II in which R is a technical fatty alcohol radical, preferably C _12/14 cocoalkyl radical, p is 0 and e is 5 to 10, which are closed with a butyl group.

Nitrogen-containing surfactants may be present as further nonionic surfactants, for example fatty acid polyhydroxyamides, for example glucamides, and ethoxylates of alkylamines, vicinal diols and / or carboxamides, the alkyl groups having from 10 to 22 C atoms, preferably 12 to 18 carbon atoms. The degree of ethoxylation of these compounds is generally between 1 and 20, preferably between 3 and 10. Preferred are ethanolamide derivatives of alkanoic acids having 8 to 22 carbon atoms, preferably 12 to 16 carbon atoms. Particularly useful compounds include the lauric, myristic and palmitic monoethanolamides.

Suitable amphoteric surfactants are, for example, betaines of the formula (R ") (R '") (R ^v ) N ⁺ CH ₂ COO ^" , in which R" denotes an alkyl radical which is optionally interrupted by hetero atoms or heteroatom groups and has 8 to 25, preferably 10 to 21 Carbon atoms and R '"and Ri ^{v are} identical or different alkyl radicals having 1 to 3 carbon atoms, in particular C ₁₀ -C ₁₈ alkyl dimethylcarboxymethylbetain and Cn-C ^ -Alkylamidopropyl-dimethylcarboxymethylbetain.

Suitable cationic surfactants include the quaternary ammonium compounds of the formula (R ^v ) (R ^vl ) (R ^v ") (R ^vl ") N ⁺ X ^" , in which R ^v to R ^vι " for four identical or different, in particular two long and two short-chain, alkyl radicals and X ^'are an anion, in particular a halide ion, for example didecyl-dimethyl-ammonium chloride, alkylbenzyl-didecyl-ammonium chloride and mixtures thereof.

Suitable anionic surfactants are preferably C ₈ -C ₁₈ -alkylbenzenesulfonates, in particular having about 12 C atoms in the alkyl moiety, C ₈ -C ₂ 0-alkanesulfonates, C ₈ -C ₈ -monoalkylsulfates, C ₈ -C ₁₈ -alkyl polyglycol ether sulfates with 2 to 6 ethylene oxide units (EO) in the ether portion and sulfosuccinic mono- and di-C ₈ -C ₁₈ alkyl esters. Can furthermore also C ₈ - C ₈ -α-olefin sulfonates, sulfonated C ₈ -C ₁₈ fatty acids, in particular Dodecylbenzolsulfo- nat, C ₈ -C ₂₂ -Carbonsäureamidethersulfate, C ₈ -C ₁₈ -Alkylpolyglykolethercarboxylate, C ₈ -C ₈ - N Acyltauride, C ₈ -C ₁₈ -N sarcosinates and C ₈ -C ₈ alkyl isethionates or mixtures thereof.

The anionic surfactants are preferably used as sodium salts, but may also be present as other alkali metal or alkaline earth metal salts, for example magnesium salts, and in the form of ammonium or mono-, di-, tri- or tetraalkylammonium salts, in the case of the sulfonates also in the form their corresponding acid, for example dodecylbenzenesulfonic acid. Examples of such surfactants are sodium cocoalkyl sulfate, sodium sec-alkanesulfonate having about 15 carbon atoms and sodium dioctylsulfosuccinate. solvent

Another preferred component of agents according to the invention are water-soluble or water-miscible organic solvents. These include, for example, lower alcohols and / or ether alcohols, where as lower alcohols in the context of this invention straight-chain or branched Ci. ₆ alkanols and diols are understood. As ether alcohols are sufficiently water-soluble compounds having up to 10 carbon atoms in the molecule into consideration.

Alcohols which can be used according to the invention are, for example, methanol, ethanol, isopropanol, n-propanol, n-butanol, ethylene glycol and propylene glycol, and also mixtures. Preferably, ethanol and / or isopropanol are used. Examples of ether alcohols which can be used according to the invention are ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol monobutyl ether, ethylene glycol monohexyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, diethylene glycol, diethylene glycol monobutyl ether and propylene glycol monotertiary butyl ether, and mixtures thereof, of which ethylene glycol monobutyl ether and propylene glycol monobutyl ether are preferred.

Particularly preferred solvents in the context of this invention are isopropanol and butylglycol. Solvents may be included in the detergent in amounts of from 0.01% to 15% by weight.

acids

To adjust the pH, the agents according to the invention, in particular acidified agents, may contain one or more acids. Suitable carboxylic acids having up to 6 carbon atoms, which may be mono-, di- or polycarboxylic acids. Examples of suitable carboxylic acids are formic acid, acetic acid, glycolic acid, lactic acid, citric acid, succinic acid, adipic acid, malic acid, tartaric acid and gluconic acid, of which acetic acid, citric acid and lactic acid are preferably used. Also suitable are carboxylic acids with an aromatic radical, for example benzoic acid or salicylic acid. In addition, the use of sulfonic acids, such as amidosulfonic acid, or of mineral acids such as hydrochloric acid, sulfuric acid or phosphoric acid is possible. However, particular preference is given to acids selected from the group comprising formic acid, lactic acid and benzoic acid and also mixtures of the same. ben. They are preferably used in amounts of 0.05 to 5 wt .-%, particularly preferably 0.5 to 3 wt .-%, in particular 1 to 2 wt .-%.

bases

As further pH-adjusting agents, aqueous disinfectants according to the invention, in particular basic adjusted agents, may contain alkalis. As such, ammonia or ammonium hydroxide and / or alkanolamines which may contain up to 9 C atoms in the molecule, for example ethanolamines, may be used. Preferred bases furthermore originate from the group of the alkali and alkaline earth metal hydroxides and carbonates, in particular the alkali metal hydroxides, more preferably potassium hydroxide and above all sodium hydroxide. Particularly preferably usable bases are ammonia or ammonium hydroxide and sodium hydroxide. The alkalis are preferably used in amounts of 0.05 to 5 wt .-%, particularly preferably 0.1 to 3 wt .-%, in particular 0.4 to 2 wt .-%.

Other ingredients

In addition to the components mentioned so far, the composition according to the invention may contain other customary ingredients for cleaning agents, including builder components, corrosion inhibitors, complexing agents, thickeners, preservatives, bleaches, enzymes, surface-modifying agents, fragrances and dyes. Overall, not more than 15 wt .-% of further ingredients should be included, preferably 0.01 to 10 wt .-%, in particular 0.1 to 5 wt .-%. For the individual ingredient, the amount used depends on the type of additive and can be determined by the skilled person based on his expertise.

The pH of the compositions according to the invention can be varied over a wide range, but preferably a range of 2.5 to 12. Glass cleaner formulations and all-purpose cleaners in particular have a pH of 5.5 to 11 and bath cleaner in particular a pH from 2 to 5. EXEMPLARY EMBODIMENTS

Example 1 :

The antibacterial activity was investigated by means of the suspension test according to DIN EN 1276.

The test standard DIN EN 1276 describes the test method as well as the minimum requirements for the bactericidal effect of chemical disinfectants and antiseptic products for the food industry, in industry, in the household and in public facilities. Thereafter, such products must under simulated load and under the required test conditions (exposure time 5 minutes at 2O ⁰ C) reduce the living germ count of the four reference strains in at least five orders of magnitude. The suspension test was carried out as described below: The four test organisms Staphylococcus aureus ATCC 6538, Escherichia coli ATCC 10536, Pseudomonas aeruginosa ATCC 15442 and Enterococcus hirae ATCC 10541 were each cultured in nutrient solutions and a certain number of the germs were subsequently cultured with a 40% solution the respective formulation. After 5 minutes, the number of test germs was determined. The tested formulations were tested under the load simulated for dirty conditions (0.3% bovine albumin).

The suspension test in accordance with DIN EN 1276, in particular with the test bacterium Pseudomonas aeruginosa ATCC 15442, shows that with formulations E4, E7, E8 according to the invention, the number of microorganisms required to pass the test is also reached under soil contamination. On the other hand, the reduction in germ number achieved with the agents described in the comparative examples was markedly lower; with composition V5, only a germ count reduction was achieved which corresponds to pure water. Table 1: Inventive cleaner

Composition [wt%, AS] E1 E2 E3 E4

Benzalkonium chloride 0.2 0.2 0.2 0.2

Phenoxyethanol 1 1 1 1

ATMP 0.2 0.2 0.2 0.2

Alkypolyglucoside C ₈ -10 (eg, PIantaren 700) 1, 58 1, 58 1, 58 1, 58

Formic acid 0.85 0.85 0.85

Lactic acid 0.8 0.8 0.8

Sodium hydroxide solution 1, 30 1, 90 1, 09

Butyl glycol 6.0

Isopropanol 5.0

C _12-14 fatty alcohol ethoxylate 4EO 0.7

Perfume 0.1 0.1 0.1 0.65

Water ad 100 ad 100 ad 100 ad 100 pH (adjusted with NaOH) 6.5 10.5 2.9 10.5

Reduction of Pseudomonas aeruginosa after 5 99.999% 99.999% 99.999% 99.999

Minutes, load 0.3% bovine albumin,

Application concentration 40%

^• : pH adjusted with NH ₄ OH

Table 2: Comparative Examples

Composition [wt.%, AS] V1 V2 V3 V4 V5

Benzalkonium chloride (e.g., Acticide BAC 0.5 0.5 0.5 0.5 0.5

50M)

phenoxyethanol

ATMP (e.g., Dequest 2000) 0.2 0.2 0.2 0.2

Alkypolyglucoside C8-10 1, 58 1, 58 1, 58 1, 58 1.58

(Z.B.PIantaren700)

Benzyl alcohol 1, 2

Formic acid 0.85 0.85 0.85 0.85

Lactic acid 0.8 0.8 0.8 0.8

Benzoic acid 0.2

Sodium hydroxide solution 1, 17 1, 26 1, 2 1, 3

Perfume 0.1 0.1 0.1 0.1 0.3

Water ad 100 ad 100 ad 100 ad 100 ad 100 pH (adjusted with NaOH) 6.0 6.0 6.5 9.0 6.0

Pseudomonas aeruginosa reduction 99.9% 99.9% 99.9% 99.9% 99% after 5 minutes, load 0.3% bovine albumin, use concentration 40%

Claims

claims

1. Aqueous disinfectant, characterized in that it comprises a combination of benzalkonium chloride, phenoxyethanol and Aminotrimethylenphosphonsäure.

2. Aqueous disinfectant according to claim 1, characterized in that it further comprises one or more anionic and / or nonionic and / or cationic and / or amphoteric surfactants.

3. Aqueous disinfectant according to claim 2, characterized in that it comprises one or more nonionic surfactants, preferably alkylpolyglycosides and / or fatty alcohol alkoxylates.

4. Aqueous disinfectant according to claim 3, characterized in that the alkylpolyglycoside is preferably an alkylpolyglucoside, in particular a C ₈ -io-alkyl polyglucoside.

5. An aqueous disinfectant according to claim 3, characterized in that the fatty alcohol alkoxylate is preferably a fatty alcohol ethoxylate, in particular a Ci ₂ - ₁₄ fatty alcohol ethoxylate having 4 EO units.

6. Aqueous disinfectant according to one of the preceding claims, characterized in that it contains one or more acids and / or one or more bases for adjusting the pH.

7. Aqueous disinfectant according to claim 6, characterized in that it preferably one or more organic or inorganic acids, in particular one or more carboxylic acids, more preferably carboxylic acids selected from the group comprising formic acid, acetic acid, lactic acid, benzoic acid, salicylic acid, citric acid, malic acid, Succinic acid, gluconic acid, glycolic acid, adipic acid, tartaric acid and mixtures thereof.

8. Aqueous disinfectant according to any one of claims 6 and 7, characterized in that it preferably contains ammonia or ammonium hydroxide and / or one or more alkali metal hydroxides.

9. Aqueous disinfectant according to one of the preceding claims, characterized in that it comprises one or more water-miscible organic solvents, preferably selected from the group comprising monohydric and polyhydric alcohols, glycol ethers and mixtures thereof.

10. Aqueous disinfectant according to claim 9, characterized in that as solvent at least one alcohol, preferably selected from the group comprising methanol, ethanol, isopropanol, n-propanol, n-butanol, ethylene glycol, propylene glycol and mixtures thereof.

11. An aqueous disinfectant according to any one of claims 9 or 10, characterized in that the solvent is at least one glycol ether, preferably selected from the group comprising ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol monobutyl ether (butyl glycol), ethylene glycol monohexyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether , Diethylene glycol, Diethylenglykolmonobutylether and propylene glycol monotertiärbutylether and mixtures thereof, is included.

12. An aqueous disinfectant according to any one of the preceding claims, characterized in that benzalkonium chloride, phenoxyethanol and aminotrimethylene phosphonic acid in a mass ratio of 0.07-1, 3: 3-7: 0.07-1, 3 are included.

13. Use of a combination of benzalkonium chloride, phenoxyethanol and aminotrimethylenephosphonic acid in an aqueous disinfectant to increase the disinfecting power.

14. Use of an aqueous disinfectant according to one of claims 1 to 12 for cleaning and / or disinfecting hard surfaces.

15. A method for cleaning and / or disinfecting hard surfaces, characterized in that an aqueous disinfectant according to any one of claims 1 to 12 is used.