EP1311653B1 - Acid preparations for cleaning and disinfecting surfaces - Google Patents

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

The present invention relates to the use of acidic preparations for Cleaning and / or disinfecting hard surfaces as well as a method for Cleaning and disinfection of equipment and acid surface cleaning and / or cleaning -desinfektionsmittel.

The use of halogen-releasing substances, halocarboxylic acids such as Monobromoacetic acid, oxidative compounds such as chlorine dioxide, peracetic acid, Active chlorine, as well as other antimicrobial substances such as isothiazolinones for cleaning and / or disinfection of hard surfaces is due to poor environmental performance and / or from a human-toxic point of view or safety-related Concerns in dealing unwanted.

Furthermore, K. H. Wallhäusser reports on "Sterilization, Disinfection and Preservation Practice", 5th ed. (1995) and from H. P. Fiedler "Encyclopedia of excipients for Pharmacy, Cosmetics and Adjacent Areas ", 3rd ed. (1989) numerous antimicrobial effective means such as a. also organic acids, phenyl compounds or Guanidine and numerous other compounds mentioned, so that finding new and very specific at best synergistic combinations Of already known substances is of particular importance.

In DE 19600475 a method for cleaning and disinfecting proposed by milking systems, one with an alkaline Detergent cleanses that as a disinfecting component Antontensides, fatty acids, alkylphosphonic acids and / or Contains ether carboxylic acids.

In DE 4026756 a new preservative based on a synergistic acting three-component or multi-component system for products or proposed systems with an aqueous phase. This system already shows a broad spectrum of antimicrobial activity at low use concentrations and is among other things the antimicrobial equipment of products from the field of detergents and cleaning agents, such as washing-up liquid and fabric softener suitable.

a) einer organischen Säure,

b) einem Monophenylglykolether und

c) einem Guanidinderivat.

enthält.In particular, a preservative is proposed which as a synergistic agents, 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 leads the Use of such three- or multi-component systems to the disadvantage that the Complexity of the preparation is increased. This has the consequence that in the preparation of a variety of different functional reactive groups available. These functional groups can interact with each other or with one another residues that are present in cleaning and / or disinfecting hard surfaces react and lead to unwanted consequences.

Depending on the application, it may, for example, cause deposit formation the interaction of the active ingredients come with other components, which the cleaning result is adversely affected.

It may also be the case that such agents in the cleaning solution the Formation of foam support, which, for example, in some of the application areas the food-producing industry is not desired.

In addition, there is a disadvantage of the three or more component systems, that the handling in production is difficult and / or the allergy danger is increased in both production and use.

Apart from that, in the prior art, only the use of such combinations for the preservation of preparations, such as cleaning agents, described. Especially in the industrial sector and increasingly also in the household sector, however, there is a need for detergents and cleaning methods, in their use achieved an additional disinfection success becomes. Effective combination detergents and disinfectants can be used depending on the field of application cause the necessary hygiene measures can be simplified.

It would be particularly desirable if by using the antimicrobial acting components also the cleaning result and the application technology Properties, such as the foaming behavior, positively influenced would.

Accordingly, the object of the present invention was to simple Preparations to search through their use in cleaning and / or disinfection of hard surfaces a good cleaning and disinfection result achieved and, if possible, at the same time the application technology Properties, such as the foaming behavior, positively influenced become.

a) eine oder mehrere Säuren ausgewählt aus Ameisen-, Essig-, Propion-, Glucon-, Milch-, Zitronen-, Glycol-, Phosphor-, Alkansulfon-, Salpeter- und Schwefelsäure sowie

b) Undecylensäure zur Reinigung und/oder Desinfektion von harten Oberflächen und Reduktion des Schaumaufkommens.

The object has surprisingly been achieved by the 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) undecylenic acid for cleaning and / or disinfecting hard surfaces and reducing the amount of foam.

Preferably, the alkanesulfonic acid listed under a) is selected from Methane, ethane, propane and butanesulfonic acid, being particularly preferred as alkanesulfonic acid Preferably, methanesulfonic acid is included.

It is preferred that the acidic preparations to be used according to the invention, based on the total preparation, contain 0.1 to 99.9% by weight, more preferably 1 to 95% by weight, and most preferably 3 to 60% by weight. of component a).
In a likewise preferred embodiment, the acidic preparations to be used according to the invention, based on the total preparation, contain from 0.1 to 20% by weight, particularly preferably from 0.3 to 15% by weight, of the alkanesulfonic acid listed under a).
It is further preferred that the acidic preparations to be used according to the invention, based on the total preparation, contain from 0.01 to 99.9% by weight, more preferably from 0.1 to 95% by weight and very preferably from 1 to 60% by weight. % of component b).

It is preferred if in the invention to be used acidic Preparations the weight ratio of the sum of those listed under a) Acids to the components listed under b) is between 200: 1 and 1:40, wherein it is particularly preferred if the weight ratio of a): b) in the Preparation between 100: 1 and 1:10 and most preferably between 10: 1 and 1: 4 is.

In a preferred embodiment, the present invention to use acid preparations have additional components with complexing Properties and / or solubilizers and / or surface-active components.

The components having complex-forming properties are preferably selected from nitrilotriacetic acid, ethylenediaminetetraacetic acid, methylglycinediacetic acid, gluconic acid, citric acid, dicarboxymethyl-L-glutamic acid, serinediacetic acid, imidosuccinic acid, and the group of polycarboxylic acids and phosphonic acids and in each case their salts.
Suitable polycarboxylic acids are, for example, polyacrylic acids and copolymers of maleic anhydride and acrylic acid and the sodium salts of these polymeric acids. Commercially available products are z. Sokalan® CP 5 and PA 30 from BASF, Alcosperse® 175 and 177 from Alco, LMW® 45 N and SPO2 ND from Norsohaas. Suitable native polymers include, for example, oxidized starch (e.g., DE 4228786) and polyamino acids such as polyglutamic acid or polyaspartic acid, e.g. B. the companies Cygnus, Bayer, Rohm & Haas, Rhone-Poulenc or SRCHEM.

Suitable phosphonic acids are, for example, 1-hydroxyethane-1,1-diphosphonic acid, diethylenetriaminepentamethylenephosphonic acid or ethylenediamine tetramethylenephosphonic acid and, in each case, their alkali metal salts.
Particularly preferred are the components with kompexbildenden properties selected from nitrilotriacetic acid, polyaspartic acid or polycarboxylic acids, which are preferably due to polymerization of aspartic acid with other carboxylic acids, and gluconic acid.

Additional solubilizing agents are preferably selected from the group the anionic surfactants, most 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 is 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 hydrolysates, silicone compounds and phosphoric esters and their salts.
As nonionic surfactants, it is possible to use in the preparations to be used according to the invention alkylpolyglucosides which are usually commercially available by condensation of fatty alcohols with glucose or polyglucose and commercially available in various variants. Examples of alkylpolyglucosides which are particularly suitable for use according to the invention are the products Glukopon® 600 from Henkel and Triton® BG10 from Röhm & Haas.

As nonionic surfactants, alkoxylated alkyl alcohols having 8 to 22 carbon atoms in the alkyl chain may be present in the preparations to be used according to the invention, more 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 having 8 to 22 carbon atoms in the alkyl chain, and most preferably at least one compound from the groups of ethoxylated and propoxylated alkyl alcohols having 12 to 22 carbon atoms in the alkyl moiety, the butyl ethers of 12 to 22 ethoxylated alkyl alcohols Carbon atoms in the alkyl moiety and methyl ether of ethoxylated alkyl alcohols having 12 to 22 carbon atoms in the alkyl part is contained, wherein in the specific case butyl ether and methyl ether of the ethoxylated 2-octyl-1-dodecanol contained n are.
Nonionic surfactants which are particularly suitable for the preparation of formulations for the use according to the invention are, 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 having an alkyl group containing 8 to 20 carbon atoms and two alkyl groups having a lower number of carbon atoms in the alkyl chain, the two shorter alkyl groups being the same or different, it being most particularly preferred that the amine oxide derivative comprises tallow fatty bis (2-hydroxyethyl) amine oxide, oleyl bis (2-hydroxyethyl) amine oxide, coconut bis (2-hydroxyethyl) amine oxide, tetradecyldimethyl amine oxide and / or alkyl dimethyl amine oxide having 12 to 18 carbon atoms in the alkyl chain.
Phosphoric acid ester compounds are preferably used as the phosphoric acid ester in the preparations to be used according to the invention, of which preferably at least one salt of a phosphoric acid partial ester is present, more preferably at least one alkali metal salt of a phosphoric acid partial ester of alkoxylated alkylphenol being present.

The phosphoric acid esters are surface-active substances which preferably from long-chain aliphatic or araliphatic alcohols derived. Particularly suitable are the salts of phosphoric acid partial esters and in particular those of alkoxylated alkylphenols proved. Preferably are used as alkali salts, the sodium and potassium salts, from which, in turn, the potassium salts are particularly preferred. Tensidisch effective Phosphorsäurepartialester, as preferably used according to the invention are available in stores. An example of an invention particularly Well-useful active ingredient of this type is the product Triton® H 66 (Röhm & Haas).

Although the use of the preparations to be used according to the invention in most cases leads to sufficient disinfection results, it may be necessary on a case by case basis to add additional antimicrobial components.
In this case, the additional antimicrobial components are preferably selected from alcohols, aldehydes, other antimicrobial acids, carboxylic acid esters, acid amides, phenols, phenol derivatives, diphenyls, diphenylalkanes, urea derivatives, oxygen, nitrogen acetals and - formals, benzamidines, isothiazolines, phthalimide derivatives, pyridine 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 selected for the additional antimicrobial components from ethanol, n-propanol, i-propanol, 1,3-butanediol, phenoxyethanol, 1,2-propylene glycol, glycerol, citric acid, 2-benzyl-4-chlorophenol, 2,2'-methylenebis (6-brom 4-chlorophenol), 2,4,4'-trichloro-2'-hydroxydiphenyl ether, N- (4-chlorophenyl) -N- (3,4-dichlorophenyl) -urea, N, N '- (1,10- decandiyldi-1-pyridinyl-4-ylidene) -bi s- (1-octanamine) dihydrochloride, N, N'-bis (4-chlorophenyl) -3,12-diimino-2,4,11,13-tetraaza-tetradecanediimidamide, quaternary ammonium compounds, guanidines, amphoteric, and gluconic acid, citric acid, lactic acid, malic acid, tartaric acid, salicylic acid, p-hydroxybenzoic acid.

Preferred application forms of the preparations to be used according to the invention are aqueous solution, gel, emulsion, paste, dispersion, powder, extrudate, Solid, dandruff, prills, tablets

It is also preferred that the preparations to be used according to the invention before use for cleaning and / or disinfecting hard Surfaces by a dilution factor 1000 to 1, more preferably 500 to dilute to 20 with water or aqueous cleaning solutions.

The application of the preparations to be used according to the invention to the cleaning and / or disinfecting hard surfaces is preferably carried out in concentrated or diluted form by dipping or by filling the object to be treated and / or via application aids. preferred Application aids are sponge, cloths, rags, brushes, wipers, rubber, Sprayer, foam device.

When using the preparations to be used according to the invention yourself, that increases the cleaning performance and / or the amount of foam in use is reduced. This surprising observed properties, in particular undecylenic acid can be used to improve the performance Profiles of acidic cleaners and / or disinfectants be used.

It is furthermore preferred with the preparations to be used according to the invention Animal hooves, tiles, walls, floor coverings, wood and stone surfaces and - floors and walls, work surfaces, machine surfaces, small parts of Machines, medical instruments and / or equipment, coated and / or uncoated tanks and / or other containers, manufacturing devices for Containers, pipes, conveyor belts, containers, for example in the field of aseptic or germ-free filling of microbiologically sensitive Food, in particular iced tea, apple juice, alcoholic and / or non-alcoholic beer, milk, yogurt to clean and / or disinfect.

Accordingly, the acidic preparations to be used in the present invention preferably in the food manufacturing and processing industry, such as. in the beverage, dairy, fish industry and butchers as well in gastronomy and company catering, beverage production, milk production and processing, cosmetics and pharmaceutical industries, hospitals, laundries, Commercial kitchens, in the cleaning of buildings, for example by professional Service providers, in agriculture and also in the household sector become.

It is particularly preferred to use the acidic preparations or the dilute solution to be used according to the invention in the CIP process. CIP is a common abbreviation in the professional world and stands for Cleaning in place.
Under CIP, the skilled artisan understands that hard surfaces of objects, containers, tanks, such as milk or fermentation tanks in breweries usually automatically by locally stored detergent on locally on or in the object to be cleaned installed inputs and devices, such as lines, pumps , Nozzles, containers, spray heads, to be cleaned.

Accordingly, CIP purification, as understood by those skilled in the art, is Cleaning hard surfaces in a specific cleaning process, the CIP procedure. The application of the invention to be used acidic Preparations or the diluted solution in this process is due the application profile with regard to foam and cleaning behavior especially prefers. The reason for this is that due to turbulent motion of the Cleaning solutions by pumping, spraying and other processes, preparations or dilute solutions prone to foaming, for the CIP process are unsuitable.

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

a) im ersten Schritt die Anlage bei Bedarf durch alkalische und/oder saure Mittel gereinigt wird, danach

b) gegebenenfalls die Oberflächen der Anlage mit Wasser abgespült werden, und anschließend

c) eine erfindunsgemäß zu verwendende saure Zubereitung oder die entsprechend verdünnte Lösung der erfindungsgemäß zu verwendenden Zubereitung manuell oder in einem automatischen System in der Anlage umgepumpt, und/oder versprüht wird, wobei die Einsatztemperaturen zwischen 0 und 100 °C und die Umpump- bzw. Sprühzeiten zwischen 5 und 120 Minuten liegen und die Anlage nach erfolgter Behandlung mit Wasser von Trinkwasserqualität gespült wird.

Another object of the present invention is a method for cleaning and disinfecting plants, in which

a) in the first step, the system is cleaned if necessary by alkaline and / or acidic means, thereafter

b) if necessary, 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 preparation to be used according to the invention is pumped and / or sprayed manually or in an automatic system in the plant, the operating temperatures being between 0 and 100 ° C. and the pumping or Spraying times between 5 and 120 minutes lie and the plant is rinsed after treatment with drinking water quality.

a) 1 bis 95 Gew.-% einer oder mehrerer Säuren ausgewählt aus Phosphor-, Alkansulfon-, Salpeter- und Schwefelsäure sowie

b) 1 bis 40 Gew.-% Undecylensäure enthalten,

   wobei der Rest auf 100 Gew.-% Wasser und/oder weitere Hilfs- und/oder Wirkstoffe sind.In addition, the subject of the present invention are acidic surface cleaning and / or disinfecting agents, based on the total agent

a) 1 to 95 wt .-% of one or more acids selected from phosphoric, alkanesulfonic, nitric and sulfuric acid and

b) contain 1 to 40% by weight of undecylenic acid,

the remainder being 100% by weight of water and / or further auxiliaries and / or active substances.

For the acid surface cleaning and / or disinfecting agent according to the invention apply the same preferred embodiments already for the Acid preparation or dilute solution to be used according to the invention were made.

Examples

In a first series of experiments, the antimicrobial spectrum of action of Phosphoric acid solutions without and with various organic acids in the quantitative suspension test according to DVG (German Veterinary Society e.V.) tested for fungicidal activity against yeasts at room temperature.

As a test germ Saccharomyces cerevisiae var. Diastaticus DSM 70487 (K5034) was used. The tested comparative formulations V1 to V6 and a formulation E1 to be used according to the invention are shown in Table 1. The formulations represent 1% dilutions of acid preparations in standardized hard water according to DVG. The results in the quantitative suspension test can be taken from Table 2. Formulations for microbiological examination (composition in% by weight) raw material E1 V1 V2 V3 V4 V5 V6 phosphoric acid 0.525 0.525 0.525 0.525 0.4725 0.4725 0.4725 ether carboxylic acid 0.07 - 0.07 0.07 0.063 0.063 0.063 propionic - - - 0.1 - - - undecylenic 0.1 - - - - - - potassium sorbate - - - - 0.1 - - dehydroacetic - - - - - 0.1 - Salicylsäurephenylester - - - - - - 0.1 diglycol 2.4 0.4 Hard water according to DVG Remainder to 100% by weight Results table on the fungicidal effectiveness according to DVG after different reaction times by specifying the reduction factors (RF) formulation Saccharomyces cerevisiae (K 5033) RF
(30 minutes) RF
(60 minutes) E1 > 3.88 > 3.83 V1 0.06 0.08 V2 0.31 0.21 V3 0.13 0.23 V4 0.08 0.17 V5 0.06 0.16 V6 0.24 0.19 RF values = germ reduction in LOG levels

From the tabulated results it can be seen that by combinations of Phosphoric acid and undecylenic acid the antimicrobial effect of phosphoric acid-containing Cleaning solutions can be significantly improved. This is especially important because it increases the hygienic safety of cleaning and disinfection processes can be increased.

In a second series of experiments, the foaming behavior of phosphoric acid solutions with and without various organic acids was investigated in the standard foam test.
A method for determining the foam behavior of detergents and disinfectants in the CIP circuit was chosen. In this method, the formation of foam formed by a Umpumpverfahrens is tested and recorded metrologically.
In particular, several points have to be observed or prepared for carrying out the method:

1st apparatus

• Cylindrical body with tempering jacket, connected to a thermostat
• Measuring scale (0 cm to 30 cm)
• rotary pump
• Thermostat (-10 ° C to 110 ° C)

2. Reagents

• Test solution
• Test contamination (10% by weight malt extract seasoning)
• distilled water (0 degrees German hardness (0 ° dH))

3. Implementation / Workflow 3.1. Testing a pure application solution

2000 g of a 1% strength by weight application solution of the preparation are produced.
500 mL of this solution is used to rinse the foam test apparatus (circulate for 5 minutes).
The apparatus is then filled with the solution up to a height of 2.5 cm (measuring scale) and brought to a test temperature of 5 ° C.
Thereafter, the solution is circulated at a flow rate of 115 L / h. The resulting foam is read after 10 minutes of circulation on the measuring scale (foam height in cm).
After switching off the pump, the foam decay rate is determined based on the foam height after 1, 3 and 5 minutes.

3.2. Testing the solution under contamination

• Addition to 500 mL solution: 100 mL test soil
  Testing as in 3.1. specified.
• Add another 100 mL of test soil after the test.
  Repeated test according to 3.1.

The tested comparative 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 acid preparations in distilled water: in the description of the test method, instead of formulations of solutions is spoken. The results of the test can be seen from Table 4. Formulations for the standard foam test (composition in% by weight) raw material E2 V7 V8 phosphoric acid 0.525 0.525 0.525 undecylenic 0.1 - - salicylic acid - - 0.1 Dest. Water Remainder to 100% by weight

4. Result

Foam height in mL in the standard foam test at 5 ° C without and with addition of test contamination formulations Foam height at different levels of test contamination (T1) 0 mL T1 100 mL T1 200 mL T1 E2 0 1 5 V7 0 2 10 V8 0 6 23

From the tabulated results it can be seen that by combinations of Phosphoric acid and undecylenic acid the foaming behavior of phosphoric acid-containing Cleaning solutions improved, especially when dirty can be. This is especially important when due to foam the expiration of the Cleaning or disinfection can be disturbed, as for example in CIP process in the food processing industry.

In a third series of experiments, the foaming behavior of phosphoric acid solutions without and with various organic acids in a foam test according to Götte (DIN 53903) was investigated.
In particular, several points have to be observed or prepared for carrying out the method:

1st apparatus

• Foaming apparatus according to Götte (DIN 53903)

2. Reagents

• Test solution
• Test contamination (10% malt extract, 10% label size (eg Optal A 1740, Henkel KGaA)), 50% NaOH (50%) in distilled water (0 degrees German hardness (0 ° dH))

3. Implementation / Workflow

200 mL of the solution to be tested are placed in a 1 L graduated cylinder. At 50 ° C in the Götte-Schaumschlagapparatur, by 100 times rising and submerging a perforated disc, produced in the solution foam. After the equipment has stopped, immediately read the foam height above 200 mL. After adding 1 mL of test soil, the beating cycle is repeated and the foam height is determined again.
This process is repeated until an instant foam height of> 300 mL is established.

The tested comparative 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 acid preparations together with NaOH in distilled water: in the description of the test method, instead of formulations of solutions is spoken. The results of the test can be seen from Table 6. Formulations for the Götte foam test (composition in% by weight) raw material E3 V9 V10 phosphoric acid 0.105 0.105 0.105 undecylenic 0.02 - - salicylic acid - - 0.02 NaOH 1.5 1.5 1.5 Dest. Water Remainder to 100% by weight

4. Result

Foam height in mL in the Götte foam test at 50 ° C without and with addition of test contamination formulations Foam height at different levels of test contamination (T1) 0 mL T1 1 mL T1 2 mL T1 3 mL T1 4 mL T1 5 mL T1 H1 0 80 150 200 280 380 H2 0 70 130 170 280 370 H3 100 250 280 370 n.d. n.d.

The tabulated results show that in the Götte attempt the combination of Phosphoric acid and undecylenic acid performs better than pure phosphoric acid and the foaming behavior with respect to phosphoric acid-containing cleaning solutions with salicylic acid especially in case of contamination and higher temperatures is much better. This is especially important when using foam Procedure of cleaning or disinfection can be disturbed, as for example in CIP processes in the food processing industry.

In a fourth series of experiments, the cleaning behavior of phosphoric acid solutions with and without various organic acids was tested against burnt yeast adhering to different substrates (V2A, Al, iron, tinned, glass).
In particular, several points have to be observed or prepared for carrying out the method:

1. Work equipment

• 3L Erlenmeyer flask with perforated stopper
• stirrer

2. Reagents

• Malt Extract (Unipath LTD., Oxoid Company)
• hop pellets
• baker's yeast
• distilled water (0 degrees German hardness (0 ° dH))
• Water of 16 degrees German hardness (16 ° dH))
• ice bath

3. Implementation / Workflow

In a 3L Erlenmeyer flask 200g of malt extract are introduced and with distilled Water made up to 2000g. At 90 ° C, this suspension is 2 hours boiled and then cooled to 10 ° C. There are different specimens Materials introduced into the suspension. Then 20g baker's yeast added and fermented for 5 days at room temperature. After the fermentation process the Erlenmeyer flask is completely emptied and - just like the test specimen rinsed with water of 16 ° dH. The fermented yeast Has both the upper glass inner wall, as well as the upper part of the test specimens dejected.

The solution to be tested becomes a solution with water at 16 ° dH and 2,5L of it filled in the dirty Erlenmeyer flask. The Test specimens are placed in sufficiently large beakers and these also sufficiently filled with the prepared solution. At room temperature and a Turning speed of 50U / minute, the replacement of the burn yeast on both Erlenmeyer flask and observed on the specimens.

The tested comparative 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 acid preparations in water of 16 degrees German hardness (° dH): in the description of the test method, instead of formulations of solutions is spoken. The results of the test were summarized in terms of the percent release of burnt yeast in Table 8. Formulations for the cleaning test (composition in% by weight) raw material E4 V11 V12 phosphoric acid 1.05 1.05 1.05 undecylenic 0.2 - - salicylic acid - - 0.2 Water (16 ° dH) Remainder to 100% by weight

4. Result

Bread peeling behavior (in%) in the described standard experiment formulations underground Percentage of burnt yeast solution after different cleaning times [minutes] 30 60 90 120 E4 V2A 100 100 100 100 al 100 100 100 100 FE, tinned 100 100 100 100 Glass 100 100 100 100 V11 V2A 70 100 100 100 al 75 80 100 100 FE, tinned 60 80 85 95 Glass 60 80 85 95 V12 V2A 75 80 100 100 al 75 100 100 100 FE, tinned 70 70 80 100 Glass 75 100 100 100

From the tabulated results it can be seen that by combinations of Phosphoric acid and undecylenic acid also the cleaning behavior of phosphoric acid-containing Cleaning solutions, especially against burnt yeast residues can be improved.

Claims (16)

1. Use of acid formulations which include

   a) one or more acids selected from formic, acetic, propionic, gluconic, lactic, citric, glycolic, phosphoric, alkanesulfonic, nitric, and sulfuric acids, and

   b) undecylenic acid,

   the balance to make 100 wt.-% being water and/or additional auxiliary and/or active substances,
   for cleaning and for reducing foam formation when cleaning and/or disinfecting hard surfaces.
2. The use according to claim 1, characterized in that an alkanesulfonic acid selected from methane-, ethane-, propane- and butanesulfonic acids is included from group a).
3. The use according to claim 1, characterized in that phosphoric acid is included from group a).
4. The use according to any of claims 1 to 3, characterized in that component a) is included with 0.1 to 99.9 wt.-%, relative to the overall formulation.
5. The use according to any of claims 1 to 4, characterized in that component b) is included with 0.01 to 99.9 wt.-%, relative to the overall formulation.
6. The use according to any of claims 1 to 5, characterized in that the weight ratio of a) : b) in the formulation is between 200:1 and 1:40.
7. The use according to claim 6, characterized in that the weight ratio of a) : b) in the formulation is between 100:1 and 1:10.
8. The use according to any of claims 1 to 7, characterized in that the formulation includes additional components having complex-forming and/or corrosion-inhibiting properties and/or solubilizers and/or surface-active agents.
9. The use according to any of claims 1 to 8, characterized in that the formulation includes additional antimicrobial components selected from alcohols, aldehydes, antimicrobial acids, carboxylic esters, acid amides, phenols, phenol derivatives, diphenyls, diphenylalkanes, urea derivatives, oxygen and nitrogen acetals and formals, benzamidines, isothiazolines, phthalimide derivatives, pyridine derivatives, antimicrobial surface-active compounds, guanidines, antimicrobial amphoteric compounds, quinolines, 1,2-dibromo-2,4-dicyanobutane, iodo-2-propynylbutyl carbamate, iodine, iodophors, peroxides, peracids.
10. The use according to any of claims 1 to 9, characterized in that the formulation is in the form of an aqueous solution, a gel, an emulsion, a paste, a dispersion, a powder, an extrudate, a solid, prills, tablets.
11. The use according to any of claims 1 to 10, characterized in that the formulation is diluted by a dilution factor of from 1000 to 1 prior to use in cleaning and/or disinfection of hard surfaces.
12. The use according to any of claims 1 to 11, characterized in that cleaning and disinfection of hard surfaces is effected in a single step.
13. The use according to any of claims 1 to 12, characterized in that a dipping process and/or a spreading means is used to furnish contact of the formulation or dilute solution with the surfaces to be treated.
14. The use according to any of claims 1 to 13, characterized in that the formulation or dilute solution is employed in a CIP process.
15. A method of cleaning and disinfecting installations, wherein

    a) if required, the installation is cleaned in a first step - possibly effected according to claims 1 to 14 - using alkaline and/or acidic agents, followed by

    b) optional rinsing of the installation surfaces with water, and subsequently

    c) circulating and/or spraying in the installation, by hand or in an automatic system, a formulation to be used in accordance with claims 1 to 14, or an appropriately diluted solution of the formulation to be used, the temperatures of use being between 0 and 100°C, the circulating and/or spraying periods ranging between 5 and 120 minutes, and rinsing the installation after completed treatment, using water of potable water quality.
16. Acid surface cleaning and/or disinfecting agents which, relative to the overall agent, include

    a) 1 to 95 wt.-% of one or more acids selected from phosphoric, alkanesulfonic, nitric, and sulfuric acids, and

    b) 1 to 40 wt.-% of undecylenic acid,

    the balance to make 100 wt.-% being water and/or additional auxiliary and/or active substances,