EP1311653A1

EP1311653A1 - Acid preparations for cleaning and disinfecting surfaces

Info

Publication number: EP1311653A1
Application number: EP01978251A
Authority: EP
Inventors: Rita Trauten; Thomas Wershofen; Stefan Küpper
Original assignee: Henkel Ecolab GmbH and Co KG; Ecolab Inc
Current assignee: Ecolab Inc
Priority date: 2000-07-27
Filing date: 2001-07-18
Publication date: 2003-05-21
Anticipated expiration: 2021-07-18
Also published as: WO2002010325A8; PL366221A1; DK1311653T3; ES2220817T3; DE10036607A1; EP1311653B1; DE50102429D1; WO2002010325A1; ATE267864T1; PL194763B1

Abstract

The invention relates to the use of acid preparations for cleaning and/or disinfecting hard surfaces, as well as a method for cleaning and disinfecting installations. The invention also relates to corresponding acid cleaning and/or disinfecting agents containing a) at least one acid chosen from formic, ethanoic, proplonic, gluconic, lactic, citric, glycolic, phosphoric, alkanesulfonic, nitric and sulfuric acid, and b) an alkenyl carboxylic acid or an alkynyl carboxylic acid having 8 to 14 C atoms and at least one double or triple bond in the alkenyl or alkynyl chain, whereby the respective C chains can additionally contain ether, alcohol, aldehyde and keto groups. The remainder of the 100 wt. % consists of water and/or other auxiliary agents and/or active ingredients.

Description

"Acidic preparations for cleaning and disinfecting surfaces"

The present invention relates to the use of acidic preparations for cleaning and / or disinfecting hard surfaces and to a method for cleaning and disinfecting systems and acidic surface cleaning and / or disinfecting agents.

The use of halogen-releasing substances, halogen carboxylic acids such as monobromacetic acid, oxidative compounds such as chlorine dioxide, peracetic acid, active chlorine, as well as other antimicrobial substances such as isothiazolinones for cleaning and / or disinfecting hard surfaces is due to poor environmental compatibility and / or from a human-toxic point of view or safety-related concerns Handling undesirable.

Furthermore, KH Wallhäusser "Practice of Sterilization, Disinfection and Preservation", 5th ed. (1995) and from HP Fiedler "Lexicon of auxiliaries for pharmacy, cosmetics and related areas", 3rd ed. (1989) contain numerous antimicrobial effective means such as u. a. also mentioned organic acids, phenyl compounds or guanidines and numerous other compounds, so that finding new and very specific, at best synergistic combinations based on already known substances is of particular importance.

DE 4026756 proposes a new preservative based on a synergistic three-component or multi-component system for products or systems with an aqueous phase. This system shows a broad antimicrobial spectrum of activity even at low application concentrations and is suitable, among other things, for the antimicrobial finishing of products from the field of detergents and cleaning agents, such as detergents and fabric softeners. In particular, a preservative is proposed which, as synergistic active ingredients, comprises a mixture of at least a) an organic acid, b) a monophenyl glycol ether and c) a guanidine derivative. contains.

In the practice of cleaning and / or disinfecting hard surfaces, the use of such three- or multi-component systems leads to the disadvantage that the complexity of the preparation is increased. The primary consequence of this is that a multitude of different functional reactive groups are present in the preparation. These functional groups can react with one another or with residues present on the hard surfaces to be cleaned and / or disinfected and can lead to undesired consequences.

Depending on the area of application, for example, deposits can form due to the interaction of the active ingredients with other components, which negatively affects the cleaning result.

It may also be the case that such active substances in the cleaning solution support the formation of foam, which is not desirable, for example, in some of the fields of application of the food-producing industry.

In addition, a disadvantage of the three- or multi-component systems is that handling in production is made more difficult and / or the risk of allergies is increased both during manufacture and during use.

Apart from that, only the use of such combinations for preserving preparations, such as cleaning agents, is described in the prior art. Particularly in the industrial area and increasingly also in the household area, however, there is a need for cleaning agents and cleaning processes which, when used, achieve additional disinfection success becomes. Combined cleaning agents and disinfectants that can be used effectively can, depending on the area of application, result in the necessary hygiene measures being simplified.

It would be particularly desirable if the use of the antimicrobial components also had a positive effect on the cleaning result and the application properties, such as the foaming behavior.

Accordingly, it was the object of the present invention to search for simple preparations which, when used in the cleaning and / or disinfection of hard surfaces, achieve a good cleaning and disinfection result and, if possible, at the same time the application properties, such as the foam behavior, positive to be influenced.

The object was surprisingly achieved by the use of acidic preparations which a) selected one or more acids from ants, vinegars, propions, glucones, milks, lemons, glycols, phosphorus, alkanesulfones and nitrates and sulfuric acid and b) an alkenecarboxylic acid or alkynecarboxylic acid with 8 to 14 C atoms and at least one double bond or triple bond in the alkene or alkyne chain, preferably an alkenecarboxylic acid, the respective C chains additionally containing ether, alcohol , Aldehyde, keto groups and the rest are 100% by weight of water and / or other auxiliaries and / or active ingredients. for cleaning and / or disinfecting hard surfaces.

The alkanesulfonic acid listed under a) is preferably selected from methane, ethane, propane and butanesulfonic acid, methanesulfonic acid being particularly preferably present as alkanesulfonic acid. It is preferred that the acidic preparations to be used according to the invention, based on the total preparation, 0.1 to 99.9% by weight, particularly preferably 1 to 95% by weight, and very particularly preferably 3 to 60% by weight component a) included.

In a likewise preferred embodiment, the acidic preparations to be used according to the invention contain 0.1 to 20% by weight, particularly preferably 0.3 to 15% by weight, of the alkanesulfonic acid listed under a), based on the total preparation.

It is further preferred that the acidic preparations to be used according to the invention are 0.01 to 99.9% by weight, particularly preferably 0.1 to 95% by weight and very particularly preferably 1 to 60% by weight, based on the total preparation. % of component b) included.

It is preferred if in the acidic preparations to be used according to the invention the weight ratio of the sum of the acids listed under a) to the components listed under b) is between 200: 1 and 1:40, it being particularly preferred if the Weight ratio of a): b) in the preparation is between 100: 1 and 1:10 and very particularly preferably between 10: 1 and 1: 4.

In a preferred embodiment, the acidic preparations to be used according to the invention contain additional components with complex-forming properties and / or solubilizing agents and / or surface-active components.

The components with complex-forming properties are preferably selected from nitrilotriacetic acid, ethylenediaminetetraacetic acid, methylglycine diacetic acid, gluconic acid, citric acid, dicarboxymethyl-L-glutamic acid, serine diacetic acid, imidosuccinic acid, and the group of polycarboxylic acids and phosphonic acids and their salts in each case.

Examples of suitable polycarboxylic acids are polyacrylic acids and copolymers of maleic anhydride and acrylic acid, and the sodium salts of these polymer acids. Commercial products are e.g. B. Sokalan® CP 5 and PA 30 from BASF, Alcosperse® 175 and 177 from Alco, LMW® 45 N and SP02 ND from Norsohaas. Suitable native polymers include, for example, oxidized starch (e.g. DE 42 28 786) and polyamino acids such as polyglutamic acid or polyaspartic acid, e.g. B. from the companies Cygnus, Bayer, Rohm & Haas, Rhône-Poulenc or SRCHEM.

Examples of suitable phosphonic acids are 1-hydroxyethane-1,1-diphosphonic acid, diethylenetriaminepentamethylenephosphonic acid or ethylenediaminetetramethylenephosphonic acid and their alkali metal salts in each case. The components with complex-forming properties are particularly preferably selected from nitrilotriacetic acid, polyaspartic acid or polycarboxylic acids, which are preferably due to the polymerization of aspartic acid with other carboxylic acids, and gluconic acid.

Additional solubilizing agents are preferably selected from the group of anionic surfactants, very particularly preferably from the sulfonates / sulfonic acids and in particular from cumene, xylene, octyl, naphthyl and alkylbenzenesulfonates / sulfonic acids, in the latter case the alkyl group between Contains 6 and 16 carbon atoms, or mixtures of these compounds and / or other compounds which act as solubilizers.

Additional preferred surface-active components are selected from the groups of anionic, cationic, nonionic, amphoteric surfactants, protein hydrolyzates, silicone compounds and phosphoric acid esters and their salts.

The nonionic surfactants used in the preparations to be used according to the invention are alkyl polyglucosides, which are usually commercially available through the condensation of fatty alcohols with glucose or polyglucose and are available commercially in various variants. Examples of Al kylpolyglukosiden that are particularly well suited for use in the invention, the products Glukopon ^® 600 Henkel and Triton ^® BG10 made by Rohm & Haas. Non-ionic surfactants which can be used in the preparations to be used according to the invention are alkoxylated alkyl alcohols having 8 to 22 carbon atoms in the alkyl chain, particularly preferably at least one compound from the groups of the mixed ethoxylates / propoxylates of branched or unbranched alkyl alcohols having 8 to 22 carbon atoms in the alkyl chain and the end-capped ethoxylates of branched or unbranched alkyl alcohols containing 8 to 22 carbon atoms in the alkyl chain, and very particularly preferably at least one compound from the groups of ethoxylated and propoxylated alkyl alcohols having 12 to 22 carbon atoms in the alkyl part, the butyl ethers of ethoxylated alkyl alcohols with 12 to 22 carbon atoms in the alkyl part and methyl ether of ethoxylated alkyl alcohols with 12 to 22 carbon atoms in the alkyl part is contained, with butyl ether and methyl ether of ethoxylated 2-octyl-1-dodecanol in the special case are old.

Nonionic surfactants that besondes for the preparation of formulations for use in the invention are well suited, for example Plurafac ^® LF 403, Plurafac ^® 431 from BASF ^®, and Dehypon LT 104 and Dehypon ^® G 2084 from Henkel.

Further preferred surface-active components are amine oxide derivatives, it being particularly preferred that the amine oxide derivative is a trialkylamine oxide with an alkyl group containing 8 to 20 carbon atoms and two alkyl groups with a smaller number of carbon atoms in the alkyl chain, the two shorter alkyl groups being able to be identical or different, it being very particularly preferred that the amine oxide derivative tallow fat bis (2-hydroxyethyl) amine oxide, oleyl bis (2-hydroxyethyl) amine oxide, coconut bis (2-hydroxyethyl) amine oxide, Tetradecyldimethylamine oxide and / or alkyldimethylamine oxide which has 12 to 18 carbon atoms in the alkyl chain.

Phosphoric acid ester compounds are preferably used as phosphoric acid esters in the preparations to be used according to the invention, among which there is preferably at least one salt of a phosphoric acid partial ester, particularly preferably at least one alkali salt of a phosphoric acid partial ester of alkoxylated alkylphenol. The phosphoric acid esters are surfactant substances which are preferably derived from long-chain aliphatic or araiphatic alcohols. The salts of the phosphoric acid partial esters and here in particular those of alkoxylated alkylphenols have proven to be particularly suitable. The sodium and potassium salts are preferably used as alkali salts, of which in turn the potassium salts are particularly preferred. Partially active phosphoric acid esters, such as are preferably used according to the invention, are commercially available. An example of an active ingredient of this kind which is particularly useful according to the invention is the product ^Triton® H 66 (Röhm & Haas).

Although the use of the preparations to be used according to the invention leads to sufficient disinfection results in most cases, it may be advisable to add additional antimicrobial components from case to case.

In this case, the additional antimicrobial components are preferably selected from alcohols, aldehydes, further antimicrobial acids, carboxylic acid esters, acid amides, phenols, phenol derivatives, diphenyls, diphenylalkanes, urea derivatives, oxygen and nitrogen acetals, and also formals, benzamidines, isothiazolines, phthalimide derivatives and pyrthalide derivatives , antimicrobial surface-active compounds, guanidines, antimicrobial amphoteric compounds, quinolines, 1, 2-dibromo-2,4-dicyanobutane, iodo-2-propynyl-butyl-carbamate, iodine, iodophores, peroxides, with particular preference the additional antimicrobial components are selected from ethanol, n-propanol, i-propanol, 1, 3-butanediol, phenoxyethanol, 1, 2-propylene glycol, glycerol, citric acid, 2-benzyl-4-chlorophenol, 2,2'-methylene-bis- (6-bromo-4-chlorophenol), 2,4,4'-trichloro-2'-hydroxydiphenyl ether, N- (4-chlorophenyl) -N- (3,4-dichlorophenyl) urea, N, N '- ( 1, 10-decanediyldi-1-pyridinyl-4-yl iden) bis (1-octanamine) dihydrochloride, N, N'-bis (4-chlorophenyl) -3,12-diimino-2,4,11, 13-tetraaza-tetradecanedimidamide, quaternary ammonium compounds , Guanidines, amphoterics, and gluconic acid, citric acid, lactic acid, malic acid, tartaric acid, salicylic acid, p-hydroxybenzoic acid.

Preferred forms of application of the preparations to be used according to the invention are aqueous solution, gel, emulsion, paste, dispersion, powder, extrudate, solid, flakes, prills, tablets It is also preferred to dilute the preparations to be used according to the invention before use for cleaning and / or disinfecting hard surfaces by a dilution factor of 1000 to 1, particularly preferably 500 to 20, with water or aqueous cleaning solutions.

The preparations to be used according to the invention are preferably applied to the hard surfaces to be cleaned and / or disinfected in concentrated or diluted form by the immersion process or by filling the object to be treated and / or by means of application aids. Preferred application tools are sponge, cloths, rags, brushes, wipers, rubber, spray device, foam device.

When using the preparations to be used according to the invention, the preferred consequence is that the cleaning performance is increased and / or the amount of foam is reduced during use by the component listed under b), in particular in the event that b) is undecylenic acid. These surprisingly observed properties, in particular component b) and particularly preferably undecylenic acid, can be used to improve the application profile of acidic cleaning agents and / or disinfectants.

It is further preferred, with the preparations to be used according to the invention, animal hooves, tiles, walls, floor coverings, wooden and stone surfaces and floors and walls, work surfaces, machine outer surfaces, small parts of machines, medical instruments and / or devices, coated and / or uncoated Tanks and / or other containers, manufacturing devices for containers, lines, conveyor belts, containers, for example in the field of aseptic or low-germ filling of microbiologically sensitive foods, in particular iced tea, apple spritzer, alcoholic and / or non-alcoholic beer, milk, yoghurt, and / or or disinfect.

Accordingly, the acidic preparations to be used according to the invention can preferably be used in the food manufacturing and processing industry, such as, for example, in the beverage, milk, fish industry and in slaughterhouses. such as in gastronomy and company catering, beverage production, milk production and processing, cosmetics and pharmaceutical industries, hospitals, laundries, canteen kitchens, in building cleaning, for example by professional service providers, in agriculture and also in the household sector.

It is particularly preferred to use the acidic preparations to be used according to the invention or the dilute solution in the ClP process. CIP is an abbreviation commonly used in the professional world and stands for cleaning in place. CIP is understood by the person skilled in the art that hard surfaces of objects, containers, tanks, such as milk or fermentation tanks in breweries, usually automatically by means of cleaning agents stored on site via devices and devices, such as lines, pumps, installed on or in the object to be cleaned , Nozzles, containers, spray heads.

Accordingly, the CIP cleaning, as the person skilled in the art understands it, is the cleaning of hard surfaces in a certain cleaning process, the ClP process. The use of the acidic preparations to be used according to the invention or of the dilute solution in this process is particularly preferred on account of the application profile with regard to foam and cleaning behavior. The reason for this is that due to turbulent movement of the cleaning solutions by pumping, spraying and other processes, preparations or dilute solutions that tend to foam, are unsuitable for the ClP process.

It is also preferred to use the acidic preparations to be used according to the invention for the simultaneous cleaning and disinfection of hard surfaces.

Another object of the present invention is a method for cleaning and disinfecting systems, in which a) in the first step the system is cleaned if necessary by alkaline and / or acidic agents, then b) optionally the surfaces of the system are rinsed with water, and then c) an acidic preparation to be used according to the invention or the correspondingly dilute solution of the invention using the preparation manually or in an automatic system in the system, and / or sprayed, the operating temperatures between 0 and 100 ° C and the pumping and spraying times between 5 and 120 minutes and the system after treatment with water from Drinking water quality is rinsed.

The present invention also relates to acidic surface cleaning agents and / or disinfectants which, based on the total agent a), contain from 1 to 95% by weight of one or more acids selected from phosphoric, alkanesulfonic, nitric and sulfuric acids and b) contain 1 to 40% by weight of undecylenic acid, the remainder being 100% by weight of water and / or other auxiliaries and / or active ingredients.

The same preferred embodiments apply to the acid surface cleaning and / or disinfectant according to the invention which have already been made for the acid preparation to be used according to the invention or the dilute solution.

Examples

In a first series of experiments, the antimicrobial spectrum of action of phosphoric acid solutions with and without various organic acids was examined in a quantitative suspension test according to DVG (Deutsche Veterinärgesellschaft e.V.) for fungicidal activity against yeasts at room temperature.

Saccharomyces cerevisiae var. Diastaticus DSM 70487 (K5034) was used as the test germ. The tested comparison formulations V1 to V6 and a formulation E1 to be used according to the invention are contained in Table 1. The formulations represent 1% dilutions of acidic preparations in standardized hard water according to DVG. The results in the quantitative suspension test can be found in Table 2.

Table 1: Formulations for microbiological testing (composition in% by weight)

Table 2:

Results table on fungicidal activity according to DVG after different exposure times by specifying the reduction factors (RF)

RF values = germ reduction in LOG levels

From the tabulated results it can be seen that combinations of phosphoric acid and undecylenic acid can significantly improve the antimicrobial effect of cleaning solutions containing phosphoric acid. This is particularly important because it can increase hygienic safety during cleaning and disinfection processes. In a second test series, the foaming behavior of phosphoric acid solutions without and with different organic acids was investigated in the standard foam test.

A method was chosen to determine the foaming behavior of cleaning and disinfectants in the CIP cycle. With this method, the foam formation formed by means of a pump-around process is checked and recorded by measurement.

In particular, several points must be observed or prepared for the implementation of the method:

1. Apparatus

• Cylindrical body with temperature jacket, connected to a thermostat

• Measuring scale (0 cm to 30 cm)

• centrifugal pump

• Thermostat (-10 ° C to 110 ° C)

2. Reagents

• Test solution

• test soiling (10% by weight malt extract wort)

• distilled water (0 degrees German hardness (0 ° dH))

3. Execution / workflow

3.1. Testing a pure application solution

2000 g of a 1% by weight application solution of the preparation are produced.

The foam test apparatus is rinsed with 500 mL of this solution (circulate for 5 minutes).

The apparatus is then filled to a height of 2.5 cm (measuring scale) with the solution and brought to a test temperature of 5 ° C. The solution is then circulated at a flow rate of 115L / h. The resulting foam is read off on the measuring scale after 10 minutes of circulation (foam height in cm). After the pump is switched off, the foam disintegration rate is determined based on the foam height after 1, 3 and 5 minutes.

3.2. Examination of the solution under contamination

• Addition to 500 mL solution: 100 mL test dirt test as under 3.1. specified.

• Add a further 100 mL test dirt after the test. Repeated test according to 3.1.

The tested comparison formulations V7 and V8 and a formulation E2 to be used according to the invention are contained in Table 3. The formulations represent 1% dilutions of acidic preparations in distilled water: the description of the test method speaks of solutions instead of formulations. The results of the test can be found in Table 4.

Table 3: Formulations for the standard foam test (composition in% by weight)

4. Result

Table 4: Foam height in mL in the standard foam test at 5 ° C with and without

Addition of test soiling

It can be seen from the tabulated results that the foam behavior of cleaning solutions containing phosphoric acid can be improved by combinations of phosphoric acid and undecylenic acid, especially when contaminated with dirt. This is particularly important if the process of cleaning or disinfection can be disturbed by foam, as is the case, for example, with ClP processes in the food processing industry.

In a third test series, the foaming behavior of phosphoric acid solutions without and with different organic acids was examined in a foam test according to Götte (DIN 53903).

1. Apparatus

• Foam whipping apparatus according to Götte (DIN 53903)

2. Reagents • Test solution • Test soiling (10% malt extract, 10% label glue (e.g. Optal A 1740, Henkel KGaA)), 50% NaOH (50%) in distilled water (0 degrees German hardness (0 ° dH))

3. Execution / workflow

200 mL of the solution to be examined are placed in a 1L measuring cylinder. At _λ 50 ° C, foam is created in the Götte foam whipping apparatus by immersing and immersing a perforated disk 100 times in the solution. After the apparatus has come to a standstill, the foam height above 200 mL is read off immediately. After adding 1 mL of test dirt, the impact cycle is repeated and the foam height is determined again.

This process is repeated until an immediate foam height of> 300 mL is achieved.

The tested comparison formulations V9 and V10 and a formulation E3 to be used according to the invention are contained in Table 5. The formulations represent 0.2% dilutions of acidic preparations together with NaOH in distilled water: the description of the test method speaks of solutions instead of formulations. The results of the test can be found in Table 6.

Table 5: Formulations for the Götte foam test (composition in

Wt .-%)

4. Result

Table 6: Foam height in mL in the Götte foam test at 50 ° C with and without

Addition of test soiling

The tabulated results show that in the Götte experiment the combination of phosphoric acid and undecylenic acid performs better than pure phosphoric acid and that the foaming behavior compared to cleaning solutions containing phosphoric acid with salicylic acid is significantly better, especially when contaminated with dirt and at higher temperatures. This is particularly important if the process of cleaning or disinfection can be disrupted by foam, as is the case, for example, with ClP processes in the food processing industry.

In a fourth series of experiments, the cleaning behavior of phosphoric acid solutions with and without different organic acids compared to burned yeast adhering to different substrates (V2A, Al, iron, tin-plated, glass) was investigated.

1. Work equipment

• 3L Erlenmeyer flask with perforated plug

• stirring device

2. Reagents

• Malt extract (Unipath LTD., Company Oxoid) • Hop pellets

• baker's yeast

• distilled water (0 degrees German hardness (0 ° dH))

• Water of 16 degrees German hardness (16 ° dH))

• ice bath

3. Execution / workflow

200g of malt extract are placed in a 3L Erlenmeyer flask and made up to 2000g with distilled water. This suspension is boiled at 90 ° C. for 2 hours and then cooled to 10 ° C. Test specimens of different materials are introduced into the suspension. Then 20g of baker's yeast are added and fermented for 5 days at room temperature. After the fermentation process, the Erlenmeyer flask is completely emptied and - like the test specimen - rinsed with water at 16 ° dH. The fermented yeast produced during fermentation has deposited on both the upper glass inner wall and the upper part of the test specimens.

A solution of the preparation to be examined is prepared with water at 16 ° dH and 2.5 L of this is filled into the dirty Erlenmeyer flask. The test specimens are placed in sufficiently large beakers and these are also sufficiently filled with the solution prepared. At room temperature and at a speed of 50 rpm, the detachment of the fired yeast is observed both on the Erlenmeyer flask and on the test specimens.

The tested comparison formulations V11 and V12 and a formulation E4 to be used according to the invention are contained in Table 7. The formulations represent 2% dilutions of acidic preparations in water of 16 degrees German hardness (° dH): when describing the test method, solutions are used instead of formulations. The results of the test are summarized in the form of the percentage detachment of quick yeast in Table 8. Table 7: Formulations for the cleaning test (composition in% by weight)

4. Result

Table 8: Firing yeast release behavior (in%) in the standard test described

From the tabulated results it can be seen that combinations of phosphoric acid and undecylenic acid can also improve the cleaning behavior of cleaning solutions containing phosphoric acid, in particular with respect to firing yeast residues.

Claims

claims

1. Use of acidic preparations which a) one or more acids selected from formic, acetic, propionic, gluconic, lactic, citric, glycolic, phosphoric, alkanesulfonic, nitric and sulfuric acid and b) contain an alkenecarboxylic acid or alkynecarboxylic acid with 8 to 14 C atoms and at least one double bond or triple bond in the alkene or alkyne chain, the respective C chains additionally containing ether, alcohol, aldehyde, keto groups and the rest to 100% by weight of water and / or other auxiliaries and / or active ingredients for cleaning and / or disinfecting hard surfaces.

2. Use according to claim 1, characterized in that the carboxylic acid b) has a cleaning-enhancing effect.

3. Use according to one of claims 1 or 2, characterized in that the carboxylic acid reduces the amount of foam in use.

4. Use according to one of claims 1 to 3, characterized in that the carboxylic acid b) is preferably an alkenecarboxylic acid.

5. Use according to any one of claims 1 to 4, characterized in that from group a) an alkanesulfonic acid selected from methane, ethane, propane and butanesulfonic acid is contained.

6. Use according to one of claims 1 to 5, characterized in that, based on the entire preparation, 0.1 to 99.9% by weight of component a) are contained.

7. Use according to one of claims 1 to 6, characterized in that based on the entire preparation 0.01 to 99.9 wt .-% of component b) are included.

8. Use according to one of claims 1 to 7, characterized in that the weight ratio of a): b) in the preparation is between 200: 1 and 1:40.

9. Use according to claim 8, characterized in that the weight ratio of a): b) in the preparation is between 100: 1 and 1:10.

10. Use according to one of claims 1 to 9, characterized in that the preparation contains additional components with complexing and / or corrosion-inhibiting properties and / or solubilizing agents and / or surface-active agents.

11. Use according to one of claims 1 to 10, characterized in that in the preparation additional antimicrobial components selected from alcohols, aldehydes, antimicrobial acids, carboxylic acid esters, acid amides, phenols, phenol derivatives, diphenyls, diphenylalkanes, urea derivatives, oxygen -, nitrogen acetals and forms, benzamidines, isothiazolines, phthalimide derivatives, pyridine derivatives, antimicrobial surface-active compounds, guanidines, antimicrobial amphoteric compounds, quinolines, 1, 2-dibromo-2,4-dicyanobutane, iodo-2-propynyl-bu - tyl-carbamate, iodine, iodophores, peroxides, peracids are included.

12. Use according to one of claims 1 to 11, characterized in that the preparation is present as an aqueous solution, gel, emulsion, paste, dispersion, powder, extrudate, solid, flakes, prills, tablets.

13. Use according to one of claims 1 to 12, characterized in that the preparation before use for cleaning and / or disinfection of hard surfaces by a dilution factor of 1000 to 1.

14. Use according to one of claims 1 to 13, characterized in that the cleaning and disinfection of hard surfaces takes place in one step.

15. Use according to one of claims 1 to 14, characterized in that the preparation or the dilute solution is brought into contact with the surfaces to be treated in the dipping process and / or by means of application aids.

16. Use according to one of claims 1 to 15, characterized in that the preparation or the dilute solution is used in the ClP process.

17. A method for cleaning and disinfecting systems, in which a) in the first step, the system is cleaned if necessary by alkaline and / or acidic agents - also possible according to claims 1 to 16 - then b) optionally the surfaces of the system with Water are rinsed off, and then c) a preparation to be used according to claims 1 to 16 or a correspondingly dilute solution of the preparation to be used is pumped around and / or sprayed in the system manually or in an automatic system, the operating temperatures being between 0 and 100 ° C and the pumping or spraying times are between 5 and 120 minutes and the system is rinsed with water of drinking water quality after the treatment.

18. Acidic surface cleaning and / or disinfectant based on the total agent a) 1 to 95% by weight of one or more acids selected from phosphoric, alkanesulfonic, nitric and sulfuric acid and b) 1 to 40% by weight undecylenic acid, the remainder to 100% by weight water and / or are other auxiliaries and / or active ingredients.