DE19511193A1 - Carpet cleaning process - Google Patents

Abstract

For cleaning fitted and other carpets, the invention calls for the use of an aqueous cleaning fluid which contains, as the basic cleaning agent, an alkali-metal salt of a polycarboxylic or hydroxycarboxylic acid with 2 to 12 C-atoms and in which, if it contains surfactant, the ratio by weight of alkali-metal salt to surfactant is at least 2:1. The cleaning can be carried out either with shampooing equipment or using spray extraction or carpet pads, a particular advantage being the low tendency to re-soil.

Description

The present invention relates to a method for cleaning Tep floors with the help of liquid detergents.

When cleaning carpets with liquid detergents under There are essentially three different processes today: the shampooingver will drive a relatively concentrated surfactant solution on the tep pich applied and with the help of brushes or similar devices under strong foam development evenly incorporated into the carpet material tet. After a certain exposure time, which should be at least a few minutes carries, the foam is then removed along with the dirt absorbed sucks or waits for the foam to settle on the carpet is dry, in order to then suck off the solid residues. With spray extract However, the cleaning processes are sprayed on and suctioned off Resource solution immediately in succession with the same device. The devices have a row of nozzles at the front in the working direction, with their Help the very dilute surfactant solution into the textile under high pressure material is blown in, and behind it a wide suction nozzle or a Series of suction nozzles with which the just inserted into the textile Liquid largely removed again from the textile and in a pre advice tank of the device is transferred. Between the application nozzles and the Suction nozzles can be provided with a brushing device. As a third ver driving is the so-called pad method, in which a ver thin detergent solution applied to the carpet in small quantities and is evenly distributed there with the help of rotating machines. In this process, the dirt is absorbed by textile pieces (pads) the over the rotating machine parts that attack on the carpet, are drawn and the distribution and incorporation of the cleaning liquid effect. Most of the machines are single-disc brushes machines such as those used for the shampooing process without a pad cover  can be used. The textile cover (pad) is after a certain Dirt pick-up replaced by a fresh one.

All three methods have in common that a more or less large part the detergent solution is not removed from the carpet and there dries up. The surfactant residues remaining on the textile contribute the majority of the particularly cleaning-active surfactants to a certain extent Stickiness of the textile material, which is not easily felt, but nevertheless leads to the fact that dust deposits on the textile are favored the. This acceleration of re-pollution is still a long way off Unsolved problem, since one assumed on the one hand, on the use of surfactants as essential cleaning agents can, but on the other hand severely restricted in the selection of surfactants was there, e.g. B. in the liquid extraction process, only slightly foaming Surfactants could be used to increase the capacity of the collection not exhausting them prematurely or, in the shampooing process, particularly foam-intensive surfactants were required. One of the tasks of The present invention was therefore to develop methods that a less tendency to re-soiling of the treated textiles resulted in the previous procedures. Another job was cleaning to find processes where predominantly or exclusively ecological harmless active ingredients are used.

It has now been found that these and other goals can be achieved if cleaning liquids for cleaning carpets or carpets uses that instead of surfactants as essential cleaning agents Contain salts of certain carboxylic acids.

The invention therefore relates to a process for the purification of tep pichboden, in which the aqueous cleaning liquid used as we Substantial cleaning agent an alkali salt of a polycarboxylic acid or contains a hydroxycarboxylic acid with 2 to 12 carbon atoms and the weight ratio of this alkali salt to optionally in the cleaning solution contained surfactant is at least 2: 1. This is preferably Ratio at least 4: 1 and in particular at least 8: 1.  

The new cleaning process is characterized above all by the fact that the Re-soiling tendency of the carpets treated in this way except is neatly small. Surprisingly, despite the comparative low surfactant content in the cleaning liquid the cleaning effect not be compared to the methods using the conventional means impaired. Most of the car used in cleaning products Bonsäuresalze are also biodegradable, so that the cleaning liquids can be discharged into the wastewater without ecological concerns nen. The new cleaning process differs from the rest conventional cleaning methods only to the extent that those according to the invention means used. It can therefore be used with ease Can be done using conventional cleaning equipment.

Additional advantages arise when spraying as the cleaning method Extraction method is used because of the missing or all if the content of surfactants in the cleaning liquid is low, the foam problems with the resumption of the cleaning liquid from the floor are so that when selecting the surfactants on a wider range than can be used so far. This spray extraction process is therefore a separate preferred subject of the invention.

With the alkali salts of carbon used in the cleaning liquid Acids are the alkali salts of di- or polycarboxylic acids and / or of hydroxycarboxylic acids having 2 to 12 carbon atoms, preferably are free of heteroatoms other than oxygen. Examples of such Carboxylic acids are succinic acid, glutaric acid, adipic acid, butane tricar bonic acid, butanetetracarboxylic acid, the tri-, tetra-, penta- and hexacarbon acids of benzene and cyclohexane, maleic acid, fumaric acid, glycol acid, lactic acid, malic acid, gluconic acid, citric acid and O-carboxy methyl tartronic acid. The alkali salts of gluconic acid are preferred and of citric acid, of which in turn alkali citrate which is preferred. In general, alkali salts are preferred the sodium salts used. Depending on the pH value in the invention agents used instead of fully neutralized acids too Partial salts are present. For standardization, therefore, salary increases  always gave the free carbon for the salts and weight ratios acids related, unless otherwise expressly stated.

The aqueous cleaning liquids to be used according to the invention can in the simplest case, the alkali salt of a polycarboxylic acid or Hydroxycarboxylic acid with 2 to 12 carbon atoms or a mixture of such alkali contain salts as the only cleaning agents. The content of this Alkali salts in the cleaning liquid applied to the textile speed preferably 0.05 to 10 wt .-%, in particular 0.2 to 5 wt .-%. Height Concentrations, for example 0.5 to 10% by weight, in particular 1 to 3 % By weight are preferred in the shampooing process, while in the spray extraction processes and lower concentrations in the pad process, for example 0.05 to 2% by weight, in particular 0.1 to 1% by weight, is customary are.

As a further cleaning-active component, the invention cleaning liquids used also contain surfactants. Essential for the new cleaning process is that the surfactant content in the Reini supply liquid compared to the content of carboxylic acid salts is only low. The weight ratio of alkali salts of polycarboxylic acids or hydroxy Total carboxylic acids, calculated as free acid, should be little to surfactant be at least 2: 1. This ratio is preferably at least 4: 1 and especially at least 8: 1 le of ionic surfactants for this calculation based on the salt form averages, as in the manufacture of cleaning fluids or the underlying concentrates were used.

For use in the cleaning liquids used according to the invention Synthetic surfactants are particularly suitable, although in Individual cases of surfactants on a natural basis, for example soaps, use can find. The synthetic surfactants are nonionic and, preferably, anionic surfactants, albeit in addition in In individual cases, the use of other types of surfactants may be appropriate. Of the Content of synthetic anionic and / or nonionic surfactants contributes preferably in the cleaning solutions used on the carpet between 0.02 and 0.5% by weight, in particular between 0.05 and 0.3% by weight. Furthermore, such surfactants are preferably used in the cleaning liquid  used together with the other components of the cleaning solution solution after the fleet remaining on the carpets has dried on solid, brittle residues.

Suitable anionic surfactants are, in particular, those of sulfate or Sulphonate type, but other types such as long chain N-acyl sarcosi can nate, salts of fatty acid cyanamides or salts of ether carboxylic acids, such as they consist of long-chain alkyl or alkylphenyl polyglycol ethers and chlorine acetic acid are accessible, are used. The anionic surfactants which are preferably used in the form of the sodium salts, but are also Lithium, potassium, and ammonium salts or salts of alkanolamines are used bar.

Sulfate acid monoesters are particularly suitable surfactants of the sulfate type of long-chain primary alcohols of natural and synthetic origin with 10 to 20 C atoms, i.e. H. of fatty alcohols such as B. Coconut fat alcohol fetch, tallow fatty alcohols, oleyl alcohol, or the C₁₀-C₂₀ oxo alcohols and those of secondary alcohols of this chain length. You also will be referred to as alkyl sulfates. In addition, there are the sulfuric acid monoesters with 1 to 6 moles of ethylene oxide ethoxylated aliphatic primary alcohols, secondary alcohols or alkylphenols (ether sulfates). Further sulfated fatty acid alkanolamides and sulfated fatty acid are suitable monoglycerides.

The sulfonate type surfactants are primarily sulfo succinic acid mono- and diesters with 6 to 22 carbon atoms in the alcohol part len to the alkylbenzenesulfonates with C₉-C₁₅ alkyl groups and to the esters of α-sulfo fatty acids, e.g. B. the α-sulfonated methyl or ethyl ester hydrogenated coconut, palm kernel or tallow fatty acids as well as sulfonates unesterified fatty acids, e.g. B. oleic acid sulfonate. Other usable ten Side of the sulfonate type are the alkane sulfonates, which from C₁₂-C₁₈ alkanes Sulfochlorination or sulfoxidation and subsequent hydrolysis or new tralization or by bisulfite addition to olefins, and the olefin sulfonates are mixtures of alkene and hydroxyalkane sulfo naten and disulfonates, such as those obtained from long-chain mono olefins with a terminal or internal double bond by sulfonation with  gaseous sulfur trioxide and subsequent alkaline or acidic Hydrolysis of the sulfonation products obtained.

The alkyl sulfates having 12 to 18 carbon atoms, the olefin sulfo, are preferred nate, the alkylbenzenesulfonates with 10 to 13 carbon atoms in the alkyl chain, the sulfates of the fatty alcohols ethoxylated with 1 to 3 mol of EO with 12 to 18 carbon atoms, the sulfosuccinic acid esters and mixtures of these surfactants used. A very particularly preferred anionic surfactant is oleic acid sulfonate.

Suitable nonionic surfactants for the process according to the invention in particular addition products of 1 to 50, preferably 5 to 15, mol Ethylene oxide on 1 mole of a long chain compound with 10 to 20 carbons Substance atoms from the group of alcohols, alkylphenols, carboxylic acids and Carboxamides. Addition products from Ethy are particularly important lenoxide (EO) to long-chain primary or secondary alcohols, such as play fatty alcohols or oxo alcohols, as well as mono- or dialkylphenols with 6 to 14 carbon atoms in the alkyl groups. If necessary, these In addition to EO, addition products also contain attached propylene oxide (PO) and / or also at the terminal hydroxyl group with short-chain alcohol fetch to be ethereal. However, others cannot be used just as well ionic surfactants, for example long-chain amine oxides and alkyl glycosides, these are condensation products from long-chain alcohols, in particular Fatty alcohols with 8 to 20, preferably 8 to 14 C atoms and 1 to 10, preferably 1 to 6 molecules of one or more reducing sugars, especially glucose. Particularly preferred nonionic surfactants are fat alcohols or oxo alcohols with 10 to 20 carbon atoms, with 5 to 15 mol EO are ethoxylated, mixtures of differently ethoxylated compounds of this type as well as alkyl glucosides with 8 to 12 carbon atoms in the alkyl part and 1 up to 4 glucose units and mixtures of these compounds.

The cleaning liquid can be used without additional additives for the inventions method according to the invention can be used. In many cases it can be useful, the cleaning solution more in carpet cleaning agents Add usual auxiliaries. Particular mention should be made of substances that reduce pollution, additional complexing agents for metal ions, preservatives, dyes, perfume, organic solvents,  Foam regulators, antistatic substances, hydrotropes and substances to regulate the pH. Also in the selection of auxiliary substances all of those that are contained in large quantities in the detergent, those preferred after drying off the liquid residues lead to solid residues on the carpet, which will later dry off can be sucked.

In the case of auxiliary materials that prevent the carpet from being soiled again if necessary, should further reduce, it is primarily to water-soluble or water-dispersible polymers, the minimal film have formation temperatures above 70 ° C and after drying not lead to films but to brittle residues. Preferably be appropriate polyacrylates and polymethacrylates are used. Your concentra tion in the cleaning liquid is normally not more than 10% by weight, preferably between 0.01 and 2% by weight.

The complex image that can also be used in the agents according to the invention are primarily aminopolycarboxylic acids and polyphosphonic acids or their salts, for example nitrilotriacetic acid and hydroxyethane diphos phonic acid. Such complexing agents are used in the invention detergent liquids preferably in amounts not exceeding 0.5 % By weight, in particular from 0.01% by weight to 0.2% by weight. Mostly can such complexing agents are however completely dispensed with.

Preservatives, dye and perfume are in the invention cleaning liquid used preferably in amounts of each over 0.5% by weight, in particular from 0.001% by weight to 0.2% by weight, and in particular which preferably contain from 0.002% by weight to 0.1% by weight.

Although the cleaning liquid as the solvent is preferably alone Containing water can be used in minor amounts of water-miscible organic Solvent may be included. These primarily include alcohols with 1 to 4 carbon atoms and mono- or dialkyl ethers of mono-, di- and tri glycols with preferably 4 to 8 carbon atoms in the molecule. Examples of such tiger solvents are ethanol, propanol, isopropanol, tert-butanol, Diethylene glycol monomethyl ether, propylene glycol monobutyl ether, ethylene  glycol monobutyl ether and diethylene glycol monobutyl ether. Are usable but also only limited or non-water-soluble solvents for example aromatic alcohols, such as benzyl alcohol, 2-phenoxyethanol and 2-phenylethanol or aliphatic gasoline fractions, which may be in emulsified form. Organic solvents are invented cleaning fluids used in accordance with the invention preferably not more than 5 % By weight, in particular from 0.02% by weight to 1% by weight.

To adjust the pH, the agents can preferably be weak acidic or weakly alkaline substances but also buffering substances Substances are added in a suitable amount. While hiring an acidic pH, preferably the carboxylic acids used make up the essential components of the cleaning agents in salt form, alkaline pH values are preferably with ammonia, ethanolamines, Na sodium hydroxide or sodium carbonate. Preferably, the inventor The cleaning liquid used according to the invention has a pH between about 3 and about 12, especially between about 5 and about 9.

The cleaning fluids used in the cleaning process according to the invention Liquid can be mixed directly from the ingredients. Since it is it is usually a very dilute cleaning agent solution In practice, however, this solution has proven to be useful before use a more concentrated preparation that contains the active ingredients in the desired Contains ratios in higher concentration by dilution with water to manufacture. The concentrates can be solid, powdery Products or tablets. But concessions are more common occurred in liquid form, which contain all active ingredients. It can be necessary for the production of single-phase liquid concentrates, Add solubilizers that ensure the perfect miscibility of all In Ensure ingredients. As solubilizing additives come in it line of hydrotropes, for example the salts of short-chain alkyl benzenesulfonic acids, if not already the water-miscible or ganic solvents perform this function. The concentration of Active ingredients in the concentrates are generally chosen so that the desired application concentrations for spray extraction by Ver thin with water in a ratio of 1:30 to 1: 500, preferably 1:50  up to 1: 200 can be achieved. For the shampooing process and that The concentrate process is preferably in a ratio of 1: 3 to Diluted 1:50, in particular 1: 6 to 1:15. Liquid concentrates can also in less diluted or undiluted form Detachur used, preferably when this means petrol contain.

A concentrate for the preparation of the reini to be used according to the invention The supply liquid then preferably contains 5 to 80, in particular 10 to 40% by weight of alkali metal salts of polycarboxylic acids or hydroxycarboxylic acids with 2 to 12 carbon atoms and preferably 0 to 30, in particular 1 to 15 % By weight of anionic or nonionic surfactants with the proviso that the weight ratio between the alkali salts of the polycarboxylic acids or Hydroxycarboxylic acids in total and the surfactants in total at least 2: 1, is preferably at least 4: 1 and in particular at least 8: 1. A basic formulation for liquid concentrates of this type, for example have the following ingredients:

10 to 60, preferably 10 to 40% by weight sodium salt of carboxylic acids from the group of succinic acid, glycolic acid, lactic acid, malic acid, gluconic acid, citric acid and mixtures thereof,
0 to 10, preferably 1 to 5% by weight of anionic surfactant from the group of oleic acid sulfonate, C₁₂-C₁₈ alkyl sulfates, C₁₂-C₁₈ fatty alcohol ether sulfates, olefin sulfonates, C₁₀-C₁₃ alkylbenzenesulfonates and mixtures thereof,
0 to 10, preferably 1 to 5% by weight of nonionic surfactant from the group of ethoxylates of C₁₀-C₂₀ alcohols and 5 to 15 moles of ethylene oxide, C₈-C₁₂ alkyl glucosides with 1 to 4 glucose units and mixtures thereof,
0 to 40, preferably 1 to 15% by weight organic solvent from the group consisting of ethanol, isopropanol, 2-phenoxyethanol, benzyl alcohol, propylene glycol monobutyl ether, gasoline and mixtures thereof,
0 to 10, preferably 1 to 5% by weight of polyacrylate with a minimum film-forming temperature above 70 ° C.,
0 to 1.5, preferably 0.1 to 1% by weight of perfume,
0 to 2, preferably 0.05 to 1% by weight of preservative,
0 to 2, preferably 0.05 to 1 wt .-% further auxiliaries
to 100 wt .-% water.

The cleaning method according to the invention is then carried out in a general form in such a way that the more or less ver thin aqueous cleaning liquid applied to the carpet and is worked into the carpet and after a sufficient exposure time at least partially along with the dirt from the carpeting is removed. The amount used and the concentration of the cleaning liquid speed can vary depending on the process variant and depends on from the carpet fiber material, the pile density, the carpet flooring structure and degree of pollution. As a variant, the shampooer chosen process, 20 to 250 ml of the diluted are preferably Cleaning solution applied per m² of carpeting, both mechanically and also applied manually, preferably by means of suitable sprayers that can. Detergents and dirt are preferably full constant drying of the carpet with the help of a vacuum cleaner distant.

In the variant of the spray extraction process, which is usually with the spray extraction devices described above is carried out from a more dilute cleaning solution, preferably 200 to 400 ml applied per m² of carpeting. Usually remain with this Ver drive 20 to 25% of the fleet amount used in the carpet material and dry off there. In a variant of this spray extraction process  the cleaning solution is not immediately removed from the carpet, but initially for a certain time of preferably 5 to 15 minutes. on leave the carpet. The application can be done with the spray extraction device but also with other sprayers when the suction unit is switched off be taken. The cleaning solution is removed from the carpet then in such a way that the carpet in a second step with the spray extraction device is processed, here again 300 to 600 ml of water per m² sprayed onto the carpet and immediately afterwards aspirated together with the existing detergent solution the. About 80 to 100 ml per m² of carpet remain as residual moisture ground.

In the variant of the pad method, preferably about 3 to about 40 ml detergent solution per m² applied, this solution by ge separate spraying or via the drive plate of the machine with which the Solution is worked into the carpet, can be applied. If the cleaning liquid is applied via the drive plate, then each new textile pad that is put on the drive plate before use additionally soaked with cleaning fluid. In the variant of the pad The process only combines a small amount of cleaning fluid with the textile pad, which is changed from time to time, from the Carpeting removed. In contrast, the majority of the Dirt on the textile pad.

Examples

In the following, the method according to the invention is described in different variations anten using various means and described in its results compared with corresponding methods in which conventional Funds were used. The composition of the in the comparative ver the means used are shown in Table 1. The together setting of the means used in the method according to the invention from Table 2, the contents of the individual Be Ingredients, calculated as pure substances, listed in percentages by weight are. All funds, unless they were available, through Stir the ingredients in water.  

Table 1

Composition of conventional cleaning agents

The agents according to the invention were mixed with the conventional cleaning agents in three different cleaning processes, namely the shampooer method, compared to the spray extraction method and the pad method. All three procedures were carried out on three differently soiled tep Patterns a to c performed, made of plain-colored light beige polya mid carpet pieces were made as follows:

• a) Pieces of carpet with the dimensions 2.0 × 1.0 m were with a equipped with natural pollution by being in 6 weeks a high-traffic corridor.
• b) carpet pieces measuring 20 × 74 cm were evenly soiled in a standard process in a drum with a standard soiling with the addition of steel balls and plastic granules. The soiling consisted of 85% by weight of finely sieved dry vacuum cleaner content and 15% by weight of a synthetic dirt mixture of the following composition:
  55% kaolin
  43% quartz flour
  1.5% soot
  0.5% iron oxide
  30 g of this soiling was applied in the drum per m² of carpeting to previously washed and dried carpet material. After the treatment in the drum, the carpet pieces were vacuumed dry.
• c) Individual pieces of the following composition were applied to pieces of carpet measuring 50x100 cm using a standard process:
  Ketchup
  Make up powder
  lipstick
  Shoe polish
  Coke
  coffee
  tea
  Waste oil
  Currant juice
  The carpet pieces soiled in this way were used for the experiments after a drying time of 1 day.

For the trials using the shampooing method, a shampooing device was used machine S403B from the company floordress used, whereby per m² carpet 300 ml of a cleaning solution were applied by dilution the agents given in Tables 1 and 2 with water in a ratio 1: 6 were made. The training period was about 1.5 mi grooves per m².

During the application the foam development was examined and in one Value scale from 1 (stable, voluminous foam) to 6 (insufficient enough Foam). The cleaning performance was assessed after drying the carpeted surfaces and thoroughly vacuuming them with a Group of 6 examiners who received a rating on a scale of 1 (very good) to 6 (insufficient). The values given in Table 3 are rounded mean values from the 18 evaluation results. To test The cleaned carpeting was pieces in a walking street for 14 days to the normal public traffic exposed. After this time, the carpet pieces were again from 6 Inspectors visually matched and with regard to re-soiling rated on a scale from 1 (very good) to 6 (insufficient).

The cleaning in the spray extraction process was carried out in all cases a spray extraction device SE12 from floordress in such a way that Approx. 400 ml cleaning solution were used per m² carpet. The un Different cleaning agent solutions were in this case by Ver thin the agent specified in Tables 1 and 2 with water in the Ver Ratio 1:50. Each solution was attached to the three carpets samples a-c checked. The assessment of cleaning ability, foam ver hold and re-soiling behavior took place as with the shampooingver drive, whereby here the scale for the foam behavior of 1 (no foam) up to 6 (unsuitable amount of foam) was enough.

The experiments with the pad method were carried out with a type Si rius of the company floordress, which with a textile pad made of polyester / tree wool 1: 3 was carried out. In this process, per m² Carpet about 30 ml of a cleaning liquid over the drive plate applied, the cleaning liquid here by diluting the in Table 1 and 2 specified agents with water in a ratio of 1: 100  had been asked. The carpet pad was made before work began impregnated with 500 ml of this cleaning solution and after processing of the three pieces of carpet to be treated in the same way, the total took about 2 minutes to change. Cleaning performance, foaming behavior and re-soiling behavior were the same as for the other methods variants evaluated, whereby here the assessment of the cleaning result after drying without further treatment. The scale for that Foam behavior ranged from 1 (no foam or disintegrated very quickly lending foam) to 6 (stable foam).

From the results listed in Table 3 it is clear that in all Variants of the method according to the invention good to very good cleaning results have been achieved which correspond to the results with the procedures in which de NEN conventional means were practically inferior. The foaming behavior in the process according to the invention is also consistently as easy to describe. In contrast, the method according to the invention is conventional process in the re-soiling behavior of the cleaned carpet clearly superior in almost all examples.

Claims (10)

1. A method for cleaning carpets, in which an aqueous cleaning liquid is incorporated into the carpets and then at least partially removed together with the dirt from the carpet, characterized in that this cleaning liquid is an alkaline salt of a polycarboxylic acid or a hydroxycarboxylic acid with 2 Contains up to 12 carbon atoms and the weight ratio of this alkali salt, calculated as the free acid, optionally tenside contained in the cleaning solution is at least 2: 1. 2. The method of claim 1, wherein the weight ratio of alkali salt of polycarboxylic acid or hydroxycarboxylic acid, calculated as free Acid, to surfactant in the cleaning liquid at least 4: 1 is preferably at least 8: 1. 3. The method according to any one of claims 1 or 2, wherein the alkali salt of Polycarboxylic acid or hydroxycarboxylic acid is selected from the group the alkali salts of gluconic acid, citric acid and their mixtures. 4. The method according to claim 3, in which as the alkali salt of a hydroxycarbon acid sodium citrate is used. 5. The method according to any one of claims 1 to 4, wherein the content of Al Potash salts of polycarboxylic acids or hydroxycarboxylic acids in the Reini supply liquid 0.05 to 10 wt .-%, preferably 0.2 to 5 wt .-% be wearing. 6. The method according to any one of claims 1 to 5, wherein the cleaning liquid in addition to the alkali salt of polycarboxylic acid or hydroxycar bonic acid contains a surfactant that is selected from the group of ionic and nonionic surfactants and their mixtures. 7. The method of claim 6, wherein the surfactant is selected from the Group oleic acid sulfonate, C₁₂-C₁₈ alkyl sulfates, C₁₂-C₁₈ fatty alcohol ether  sulfates, olefin sulfonates, C₁₀-C₁₃ alkylbenzenesulfonates, ethoxylates of C₁₀-C₂₀ alcohols and 5 to 15 moles of ethylene oxide, C₈-C₁₂ alkyl glucosides with 1 to 4 glucose units and their mixtures. 8. The method according to claim 7, in which oleic acid sulfonate is used as the surfactant becomes. 9. Concentrated cleaning agent for the production of an aqueous cleaning agent Delivery liquid for the method according to claim 1, containing 5 to 80 % By weight of alkali metal salts of polycarboxylic acids or hydroxycarboxylic acids with 2 to 12 carbon atoms, calculated as free acid, and 1 to 15% by weight of anionic or nonionic surfactants with the proviso that the Weight ratio between the alkali salts of the polycarboxylic acids or Hydroxycarboxylic acids in total and the surfactants in total at least 2: 1, preferably at least 4: 1 and in particular at least 8: 1 be wearing. 10. Concentrated detergent in liquid form according to claim 9, containing
10 to 40% by weight sodium salt of carboxylic acids from the group succinic acid, glycolic acid, lactic acid, malic acid, gluconic acid, citric acid and mixtures thereof,
1 to 5% by weight of anionic surfactant from the group of oleic acid sulfonate, C₁₂-C₁₈ alkyl sulfates, C₁₂-C₁₈ fatty alcohol ether sulfates, olefin sulfonates, C₁₀-C₁₃ alkylbenzenesulfonates, sulfosuccinic acid esters and mixtures thereof,
1 to 5% by weight of nonionic surfactant from the group of ethoxylates of C₁₀-C₂₀ alcohols and 5 to 15 moles of ethylene oxide, C₈-C₁₂-alkyl glucosides with 1 to 4 glucose units and mixtures thereof,
0 to 40, preferably 1 to 15% by weight organic solvent from the group consisting of ethanol, isopropanol and 2-phenoxyethanol,
Benzyl alcohol, propylene glycol monobutyl ether, gasoline and mixtures thereof,
0 to 10, preferably 1 to 5% by weight of polyacrylate with a minimum film-forming temperature above 70 ° C.,
0 to 1.5, preferably 0.1 to 1% by weight of perfume,
0 to 2, preferably 0.05 to 1% by weight of preservative,
0 to 2, preferably 0.05 to 1 wt .-% further auxiliaries
to 100 wt .-% water.