EP4012011A1 - Cleaning agent, particularly for a kitchen appliance - Google Patents

Abstract

The present invention relates to a cleaning agent for an electric motor-operated kitchen appliance, in particular with a cooking function, and to a method for cleaning a kitchen appliance with the cleaning agent portion according to the invention. Furthermore, the subject of the present invention is a use of the cleaning agent according to the invention for cleaning an electric motor-operated food processor.

Description

The present invention relates to a cleaning agent for an electric motor-operated kitchen appliance, in particular with a cooking function, and to a method for cleaning a kitchen appliance with the cleaning agent portion according to the invention. Furthermore, the subject of the present invention is a use of the cleaning agent according to the invention for cleaning an electric motor-operated food processor.

Electromotive food processors are very popular. In addition to the actual function of the food processor, current devices have a cooking function, so that food can be prepared in the food processor.

Especially in food processors with a cooking and thus heating function, such as those sold under the brands "Thermomix" (Vorwerk), "Cooking Chef" or "kCook" (Kenwood), "Cookit" (Bosch), "Prep&Cook" (Krups) or "Artisan CookProcessor” (Kitchen Aid) are on the market, a wide variety of types of food can be prepared. For cleaning, the mixing bowl and the mixing tool usually have to be removed and cleaned either by hand or in a dishwasher.

Cleaning in the dishwasher takes a long time, so that several dishes that should be eaten together if possible cannot be prepared in the food processor. The preparation of 2 courses of a menu is only possible if one of the two courses is eaten cold or can be warmed up.

Cleaning by hand is usually faster than using a dishwasher. However, this is often felt to be uncomfortable. In addition, you are busy with your hand while it is being cleaned and cannot do anything else during this time, such as preparing the next course or eating warm the dish that has already been prepared.

Especially when preparing starchy dishes, such as risotto or pudding, dirt can also appear in the mixing bowl and sometimes on the mixing tool both after cleaning in the dishwasher and after cleaning by hand to be available. In food processors with a cooking function, the mixing bowls are made of stainless steel. Starch stains, such as those that occur when cooking potatoes, pasta, rice and especially risotto, are often difficult to remove from stainless steel. Especially when preparing risotto, where the rice has been in contact with the stainless steel bowl for a longer period of time, starch stains can often be seen even after cleaning in the dishwasher or by hand.

Such starch stains can be removed with vinegar, for example, after the actual cleaning. A further cleaning step is therefore required. The mixing bowl must then be rinsed again to prevent dishes being prepared in the mixing bowl from taking on the taste of vinegar.

Depending on the design of the agitator, soiling similar to that on the mixing bowl can occur on it.

The complete, thorough cleaning of a mixing bowl, especially one made of stainless steel, is therefore often time-consuming. In particular, the complete removal of starch stains requires a lot of time and usually several cleaning steps.

There is therefore a need for a cleaning agent that easily and effectively cleans the mixing bowls and agitator of a food processor, in particular an electric motor-driven food processor, in particular those with a cooking function, without manual cleaning (scrubbing) being required. Starch soiling, in particular from stainless steel, should also be removed as effectively as possible. The cleaning agent should act as quickly as possible so that cleaning can take place quickly and the mixing bowl can be used again for another dish.

Surprisingly, it has been shown that a cleaning agent which has a higher proportion of amylase than known cleaning agents solves the objects on which the present invention is based. In a first embodiment, the present invention therefore relates to a cleaning agent for cleaning an electric motor-operated kitchen appliance, in particular a kitchen appliance with a heating function, characterized in that it has at least one amylase and at least one protease, the weight ratio of amylase to protease being 1:10 to 5 :1.

In a further embodiment, the present invention therefore relates to a cleaning agent for cleaning an electric motor-operated kitchen appliance, in particular a kitchen appliance with a heating function, characterized in that it has at least one amylase and at least one protease, with 0.05 to 1.0% by weight , preferably 0.1 to 0.6 wt .-%, in particular 0.12 to 0.4 wt .-% active enzyme protein of amylase (based on the amount of the total composition) are used.

It has been shown that the cleaning agent according to the invention can be introduced directly into the mixing bowl of a food processor. The addition of water creates a cleaning liquid inside the bowl, which cleans the inside of the bowl on the walls and in the area of the floor, i.e. cleans the surfaces that come into contact with the cleaning liquid and thus with the cleaning agent according to the invention. If an agitator is switched on, the cleaning can be particularly effective, since the liquid then comes into contact with other areas of the mixing bowl, as the liquid rises up the edge of the mixing bowl.

Compared to conventional hand dishwashing detergents, the cleaning agent according to the invention has better cleaning performance, in particular when removing starch stains from stainless steel. Cleaning agents for dishwashers could also be used to clean mixing bowls, in particular kitchen machines operated by electric motors. However, these are also not effective in removing starch stains from stainless steel. In addition, these are often in the form of tabs. If you now turn on a food processor with an agitator to improve the cleaning performance, the agitator can be damaged by contact with the tab, especially if the agitator is designed in the manner of knives.

According to the invention, the cleaning agent can preferably be present in portions. Appropriate portions of detergent are matched to the volume of standard mixing bowls in food processors. This makes handling easy and safe for the consumer. In addition, the concentration of enzymes and other active substances that may be present in the cleaning liquid can be ensured.

In addition, the cleaning agent according to the invention is particularly readily soluble in water, so that the mixing bowl can be cleaned in a short time of preferably 10 minutes or less, in particular 7 minutes or less. This also applies if the cleaning agent is present as a cleaning agent portion. In this case, the detergent is in a water-soluble or water-dispersible container (pouch) before. Where water-soluble or water-dispersible means that the container dissolves or disperses in cold water (water temperature: 20 °C) with stirring within 30 s or less, so that the cleaning agent is completely available. Corresponding pouches are usually made of PVA and are known to the person skilled in the art.

"At least one" as used herein includes, but is not limited to, 1, 2, 3, 4, 5, 6 and more. With regard to an ingredient, the information refers to the type of ingredient and not to the absolute number of molecules. "At least one surfactant" thus means, for example, at least one type of surfactant, i.e. one type of surfactant or a mixture of several different surfactants can be meant. Together with weight information, the information refers to all compounds of the type specified that are contained in the composition/mixture, i.e. the composition does not contain any other compounds of this type beyond the specified amount of the corresponding compounds.

Unless otherwise stated, the percentages by weight given in this application relate to the active substance content in g, based on the weight of the entire composition in g.

These and other aspects, features and advantages of the invention will become apparent to those skilled in the art from a study of the following detailed description and claims. Each feature from one aspect of the invention can be used in any other aspect of the invention. Furthermore, it should be understood that the examples contained herein are intended to describe and illustrate the invention, but not to limit it, and in particular the invention is not limited to these examples. Numerical ranges given in the format "from x to y" include the stated values. Where multiple preferred numeric ranges are given in this format, it is understood that any ranges resulting from the combination of the different endpoints are also included.

Since the agents of the invention are preferably solid, the specified pH value in various embodiments relates to a 10% solution of the respective composition in distilled water at 25°C.

"Phosphate-free" and "phosphonate-free" as used herein means that the composition in question is essentially free of phosphates and phosphonates, respectively, ie in particular Contains phosphates or phosphonates in amounts of less than 0.1% by weight, preferably less than 0.01% by weight, based on the respective composition.

The presence of enzymes in dishwashing detergents is well known. Proteases are usually used in cleaning agents to remove proteinaceous soiling from porcelain and glasses, for example caused by meat or eggs. Even if cleaning agents for dishwashers contain both amylases and proteases in one cleaning agent, there are still problems in removing starchy soiling from stainless steel.

Surprisingly, it has been shown that if the proportion of amylases is significantly increased compared to the proportion of proteases, not only soiling containing protein but also starch soiling can be removed from hard surfaces and in particular from stainless steel. Not only is the cleaning performance itself very good, but also the time it takes to clean. Cleaning takes just a few minutes.

In a preferred embodiment, the present invention relates to a cleaning agent for cleaning an electric motor-operated food processor, in particular a food processor with a heating function, characterized in that it has at least one amylase and at least one protease, the weight ratio of amylase to protease being 1:10 to 5: is 1.

The weight ratio of amylase to protease is preferably (in each case based on the amount of active enzyme protein) 1:7 to 2:1, preferably 1:5 to 1:1.5, in particular 1:3 to 1:1.

According to a preferred embodiment, the present invention relates to a cleaning agent for cleaning an electric motor-operated kitchen appliance, in particular a kitchen appliance with a heating function, characterized in that it has at least one amylase and at least one protease, with 0.05 to 1.0% by weight, preferably 0.1 to 0.6% by weight, in particular 0.12 to 0.4% by weight, of active amylase enzyme protein (based on the amount of the total composition) is used and the weight ratio of amylase to protease (each based on the amount of active enzyme protein) is 1:10 to 5:1, 1:7 to 2:1, preferably 1:5 to 1:1.5, in particular 1:3 to 1:1.

Examples of amylases which can be used according to the invention are the α-amylases from Bacillus licheniformis, from B. amyloliquefaciens, from B. stearothermophilus, from Aspergillus niger and A. oryzae and the further developments of the aforementioned amylases which have been improved for use in dishwashing detergents. Particularly suitable are amylases that have increased stability to bleach, for example Excellenz ^™ S1000, Excellenz ^™ S3300 (Dupont) and Stainzyme ^™ Plus, in particular Stainzyme ^™ Plus 12 T or Stainzyme ^™ Plus 24 T, from Novozymes, in particular the use of Excellenz ^™ S3300 or Stainzyme Plus is preferred.

Examples of amylases are the α-amylases from Bacillus licheniformis, Bacillus amyloliquefaciens or Bacillus stearothermophilus and, in particular, further developments thereof which have been improved for use in detergents or cleaning agents. The enzyme from Bacillus licheniformis is available from the company Novozymes under the name ^Termamyl® and from the company Danisco/DuPont under the name ^Purastar® ST. Further development products of this α-amylase are available under the trade names ^Duramyl® and ^Termamyl® ultra (both from Novozymes), Purastar® ^OxAm (Danisco/DuPont) and ^Keistase® (Daiwa Seiko Inc.). Bacillus amyloliquefaciens α-amylase is marketed by the Novozymes company under the name ^BAN® , and variants derived from Bacillus stearothermophilus α-amylase under the names ^BSG® and ^Novamyl® , also by the Novozymes company. Furthermore, for this purpose, the α-amylase from Bacillus sp. A 7-7 (DSM 12368) and the cyclodextrin glucanotransferase (CGTase) from Bacillus agaradherens (DSM 9948). Furthermore, the amylolytic enzymes can be used, which are described in the international patent applications WO 95/26397 A1 , WO 96/23873 A1 , WO 99/23211 A1 , WO 00/60060 A2 , WO 03/002711 A2 , WO 03/054177 A2 , WO 2006/002643 A2 , WO 2007/079938 A2 , WO 2011/100410 A2 and WO 2013/003659 A1 are revealed. Fusion products of all the molecules mentioned can also be used. In addition, the further developments of α-amylase from Aspergillus niger and A. oryzae available under the trade names ^Fungamyl® from the company Novozymes are suitable. Other commercial products that can be used advantageously are, for example, Amylase- ^LT® and ^Stainzyme® or ^Stainzyme® ultra or ^Stainzyme® plus as well as Amplify™ 12L or Amplify Prime™ 100L, the latter also from Novozymes, and the PREFERENZ ^S® series from Danisco/DuPont , including, for example, PREFERENCE S100 ^® , PREFERENCE S1000 ^® or PREFERENCE S210 ^® . Variants of these enzymes obtainable by point mutations can also be used according to the invention.

Examples of proteases that can be used according to the invention are, in particular, proteases of the subtilisin type (subtilases, subtilopeptidases, EC3.4.21.62 ), which due to the catalytically active Amino acids are serine proteases. They act as non-specific endopeptidases and hydrolyze any acid amide bonds that are inside peptides or proteins. Their optimum pH is usually in the clearly alkaline range. An example of an overview of this family can be found in Article "Subtilases: Subtilisin-like Proteases" by R. Siezen, pages 75-95 in "Subtilisin enzymes", edited by R. Bott and C. Betzel, New York, 1996 . Subtilases are naturally produced by microorganisms. Among these, the subtilisins formed and secreted by Bacillus species should be mentioned in particular as the most important group within the subtilases, as well as the optimized variants thereof known from the prior art.

Examples of proteases are the subtilisins BPN' from Bacillus amyloliquefaciens and Carlsberg from Bacillus licheniformis, the protease PB92, the subtilisins 147 and 309, the protease from Bacillus lentus, subtilisin DY and the enzymes which can be assigned to the subtilases, but no longer to the subtilisins in the narrower sense Thermitase, proteinase K and the proteases TW3 and TW7. Subtilisin Carlsberg is available in a further developed form under the trade name ^Alcalase® from the Novozymes company. The Subtilisins 147 and 309 are marketed under the trade names ^Esperase® and ^Savinase® by the Novozymes company. Protease variants are derived from the protease from Bacillus lentus DSM 5483. Other usable proteases are, for example, those sold under the trade names Durazym®, ^Relase® , ^Everlase® , ^Nafizym® , ^Natalase® , ^Kannase® , Progress Uno ^101L® and ^Ovozyme® from the company Novozymes, sold under the trade names ^Purafect® , ^{Purafect® OxP} , Purafect ^® Prime, Excellase ^® , Properase ^® , Preference P100 ^® and Preference P300 ^® from Danisco/DuPont, sold under the trade name Lavergy pro 104 LS ^® from BASF, sold under the trade name Protosol ^® by Advanced Biochemicals Ltd., sold under the trade name Wuxi ^® by Wuxi Snyder Bioproducts Ltd., sold under the trade names Proleather ^® and Protease P ^® by Amano Pharmaceuticals Ltd., and sold under the name Proteinase K-16 by Kao Corp . available enzymes. The proteases from Bacillus gibsonii and Bacillus pumilus, which are disclosed in the international patent applications, are also used with particular preference WO 2008/086916 A1 and WO 2007/131656 A1 . Further proteases which can be used advantageously are disclosed in the patent applications WO 91/02792 A1 , WO 2008/007319 A2 , WO 93/18140 A1 , WO 01/44452 A1 , GB 1243784A , WO 96/34946 A1 , WO 02/029024 A1 and WO 03/057246 A1 . Other proteases that can be used are those that are naturally present in the microorganisms Stenotrophomonas maltophilia, in particular Stenotrophomonas maltophilia K279a, Bacillus intermedius and Bacillus sphaericus.

Proteases to be used with particular preference are, for example, those in WO 2017/215925 A1 disclosed proteases, as well as Excellenz ^™ P1000 (Dupont), Ovozymes ^™ and/or Blaze ^™ , in particular Blaze Evity 125 T and 150 T, (Novozymes).

In addition to the exemplary amylases and proteases described herein, other amylases and/or proteases can also be used.

The cleaning agent is preferably present in portions. A portion size is adapted to the size of the mixing bowl to be cleaned.

Typical sizes for mixing bowls in kitchen appliances operated by electric motors include a volume of about 1 l to 3 l. The cleaning agent is preferably provided in such a way that portion sizes of 5-15 g, in particular 7-12 g, are present. This can be done, for example, by providing suitable containers, for example pouches, which are filled with the cleaning agent according to the invention.

The portioning ensures that the weight ratio of amylase to protease is guaranteed for each application. The concentration of amylase and protease in the cleaning liquor, which is formed as a result of the cleaning agent being dissolved in water, is also ensured with one cleaning agent portion, so that good cleaning performance can take place.

According to a further preferred embodiment, the amount of all amylases, based on the amount of active enzyme protein, in the cleaning liquor is from 1 to 100 mg, preferably 5 to 50, in particular 8 to 25 mg of the amylase.

According to a further preferred embodiment, the amount of all proteases, based on the amount of active enzyme protein, in the cleaning liquor is 5 to 800.0 mg, preferably 10 to 200 mg, in particular 15 to 100 mg.

With these quantity ranges, good cleaning can be ensured in the desired time, namely within 10 minutes or less, in particular 7 minutes or less.

The cleaning agent according to the invention is preferably alkaline. The pH of a 10% solution of the cleaning agent in distilled water at 25° C. is preferably in the range from 8.5-12, in particular from 9.5-11. At this pH value range, the enzymes can be stored stably without the effect being weakened. In addition, good cleaning is also possible here, whereby the stainless steel mixing bowl is not corrosively attacked, for example. In addition to the amylases and proteases in the weight ratios mentioned, the cleaning agent according to the invention can also contain one or more components customary for cleaning agents selected from surfactants, enzyme stabilizers, solvents, salts, builders, pH stabilizers, corrosion inhibitors, thickeners, foam inhibitors, dyes, fragrances, polymers and perfume carriers.

In a further embodiment, the present invention relates to the use of a cleaning agent according to the invention for cleaning a mixing bowl and/or an agitator, in particular an electric motor-operated food processor. The cleaning agent according to the invention is particularly suitable for removing starch stains from stainless steel. The cleaning preferably takes place within a period of 10 minutes or less, in particular 7 minutes or less.

1. a) ein Reinigungsmittel wie vorstehend in verschiedenen Ausführungsformen beschrieben in die Rührschüssel gibt und das Reinigungsmittel in Wasser auflöst, so dass eine Reinigungsflotte entsteht,
2. b) einwirken lassen der Reinigungsflotte in der Rührschüssel über einen Zeitraum von 5 Minuten bis 10 Minuten, wobei die Temperatur der Reinigungsflotte 75 °C nicht übersteigt, wobei sich gegebenenfalls das Rührwerk im Inneren der Rührschüssel befindet und mit der Reinigungsflotte in Kontakt steht, und
3. c) abschließend Ausspülen der Rührschüssel und ggf. Abspülen des Rührwerks mit klarem Wasser.

In a further embodiment, the present invention relates to a method for cleaning a mixing bowl and/or an agitator of an electric motor-operated food processor, which is characterized in that

1. a) a cleaning agent as described above in various embodiments in the mixing bowl and dissolves the cleaning agent in water so that a cleaning liquor is formed,
2. b) allowing the cleaning liquor to act in the mixing bowl over a period of 5 to 10 minutes, with the temperature of the cleaning liquor not exceeding 75 °C, with the agitator possibly being inside the mixing bowl and being in contact with the cleaning liquor, and
3. c) finally rinsing out the mixing bowl and, if necessary, rinsing off the agitator with clear water.

To clean the mixing bowl and/or the agitator, it is not necessary to mechanically clean the mixing bowl with a sponge or brush. The cleaning and in particular also the removal of starch stains takes place solely on the basis of the specific composition of the cleaning agent according to the invention.

The temperature of the cleaning liquor is preferably 30.degree. C. to 70.degree. The enzymes contained are active in this temperature range and can thus remove particularly good dirt from the mixing bowl or loosen it from the material. A temperature of 75 °C should not be exceeded, otherwise the enzymes will be inactivated.

At temperatures below 50° C. and in particular below 45° C., preferably below 30° C., the activity of the enzymes is too low for effective purification to take place.

The cleaning agent according to the invention thus enables a method for cleaning stainless steel surfaces within a very short time at appropriate temperatures. Mechanical cleaning, such as with a sponge or brush, is not necessary. Nevertheless, you get a clean surface.

Due to the preferred temperature, the surface, i.e. the mixing bowl, is not so warm that you can no longer touch it. Further use immediately after cleaning and subsequent rinsing is therefore possible.

The cleaning agent is preferably portioned, with the casing, ie the water-soluble container, preferably being selected in such a way that it dissolves in water within a period of 10 seconds. Dissolving means that the cleaning agent inside can escape completely from the water-soluble or water-dispersible container and can thus develop its cleaning effect.

According to a further particularly preferred embodiment, the cleaning agent, preferably dishwashing agent, in particular automatic dishwashing agent, is a cleaning agent portion in a water-soluble envelope with one or possibly also several chambers/compartments. The cleaning agent is preferably packaged as a one-time cleaning agent portion, so that it is used to carry out a cleaning cycle and is (largely) essentially consumed in the process.

The water-soluble cover is preferably formed from a water-soluble film material which is selected from the group consisting of polymers or polymer mixtures. The cover can be formed from one or from two or more layers of the water-soluble film material. The water-soluble film material of the first layer and the further layers, if any, can be the same or different.

It is preferred that the water-soluble coating contains polyvinyl alcohol or a polyvinyl alcohol copolymer. Water-soluble coatings that contain polyvinyl alcohol or a polyvinyl alcohol copolymer have good stability with sufficiently high water solubility, especially cold water solubility.

Suitable water-soluble films for producing the water-soluble casing are preferably based on a polyvinyl alcohol or a polyvinyl alcohol copolymer whose molecular weight is in the range from 10,000 to 1,000,000 gmol ^-1 , preferably from 20,000 to 500,000 gmol ^-1 , particularly preferably from 30,000 to 100,000 gmol ^-1 and in particular from 40,000 to 80,000 gmol ^-1 .

Polyvinyl alcohol is usually produced by hydrolysis of polyvinyl acetate, since the direct synthesis route is not possible. The same applies to polyvinyl alcohol copolymers which are correspondingly produced from polyvinyl acetate copolymers. It is preferred if at least one layer of the water-soluble coating comprises a polyvinyl alcohol whose degree of hydrolysis is 70 to 100 mol %, preferably 80 to 90 mol %, particularly preferably 81 to 89 mol % and in particular 82 to 88 mol %.

In a preferred embodiment, the water-soluble packaging consists of at least 20% by weight, more preferably at least 40% by weight, very preferably at least 60% by weight and in particular at least 80% by weight of a polyvinyl alcohol whose Degree of hydrolysis is 70 to 100 mol%, preferably 80 to 90 mol%, particularly preferably 81 to 89 mol% and in particular 82 to 88 mol%.

A polymer containing (meth)acrylic acid-containing (co)polymers, polyacrylamides, oxazoline polymers, polystyrene sulfonates, polyurethanes, polyesters, polyethers, polylactic acid or mixtures of the above can additionally be added to a polyvinyl alcohol-containing film material suitable for producing the water-soluble covering Polymers can be added. A preferred additional polymer are polylactic acids.

In addition to vinyl alcohol, preferred polyvinyl alcohol copolymers include dicarboxylic acids as further monomers. Suitable dicarboxylic acids are itaconic acid, malonic acid, succinic acid and mixtures thereof, with itaconic acid being preferred. Polyvinyl alcohol copolymers which are also preferred include, in addition to vinyl alcohol, an ethylenically unsaturated carboxylic acid, its salt or its ester. Such polyvinyl alcohol copolymers particularly preferably contain, in addition to vinyl alcohol, acrylic acid, methacrylic acid, acrylic acid esters, methacrylic acid esters or mixtures thereof.

It can be preferred that the film material contains other additives. The film material can contain, for example, plasticizers such as dipropylene glycol, ethylene glycol, diethylene glycol, propylene glycol, glycerine, sorbitol, mannitol or mixtures thereof. Other additives include, for example, release aids, fillers, crosslinking agents, surfactants, antioxidants, UV absorbers, antiblocking agents, antiadhesive agents or mixtures thereof.

Suitable water-soluble films for use in the water-soluble wrappers of the water-soluble packages according to the invention are films sold by MonoSol LLC, for example under the designations M8720, M8630, M8312, M8440, M7062, C8400 or M8900. Films sold by Nippon Gohsei under the designation SH2601, SH2504, SH2707 or SH2701 are also suitable. Other suitable films include ^Solublon® PT, ^Solublon® GA, ^Solublon® KC or ^Solublon® KL films from Aicello Chemical Europe GmbH or Kuraray VF-HP films.

The water-soluble coating preferably has at least partially a bitter substance with a bitterness between 1,000 and 200,000, in particular those selected from quinine sulfate (bitter value=10,000), naringin (bitter value=10,000), sucrose octaacetate (bitter value=100,000), quinine hydrochloride and mixtures thereof. In particular, the outer surface of the water-soluble casing is at least partially coated with a bitter substance having a bitterness value between 1,000 and 200,000. In this context, it is particularly preferable that the water-soluble casing is coated to at least 50%, preferably at least 75% and most preferably at least 90% with the bitter substance having a bitterness value between 1,000 and 200,000. The application of the bitter substance with a bitter value between 1,000 and 200,000 can be done, for example, by printing, spraying or brushing.

If the cleaning agent according to the invention has at least one surfactant, it can have one or more anionic surfactants, cationic surfactants, nonionic surfactants or amphoteric surfactants.

The cleaning agent according to the invention preferably contains at least one nonionic surfactant. It is preferred that a mixture of two or more nonionic surfactants is used in the detergent.

A nonionic surfactant useful in the cleaning compositions herein can be any of the nonionic surfactants known to those skilled in the art. In preferred embodiments, nonionic surfactants from the group of alkoxylated alcohols are used. A class of preferably usable nonionic surfactants, which can be used either as sole nonionic surfactant or in combination with other nonionic surfactants, are accordingly alkoxylated, preferably ethoxylated or ethoxylated and propoxylated fatty alcohols.

In various preferred embodiments, a fatty alcohol alkoxylate, in particular a fatty alcohol ethoxylate, is therefore used. In particular, non-capped fatty alcohol alkoxylates are preferred.

In preferred embodiments, the fatty alcohol ethoxylate has the formula

R ¹ -O-(EO) _m -H,

where R ¹ is a linear or branched, substituted or unsubstituted alkyl group having 12 to 24, in particular 14 to 20, in particular 16 to 18 carbon atoms; EO is an ethylene oxide moiety; and m is 10 to 50, especially 20 to 30, preferably 22 to 27, especially 25.

In particularly preferred embodiments, the fatty alcohol ethoxylate has the formula

R ¹ -O-(EO) _m -H,

where R ¹ is a linear or branched, substituted or unsubstituted alkyl group having 16 to 18 carbon atoms; EO is an ethylene oxide moiety; and m is 20 to 30, preferably 22 to 27, especially 25.

In one embodiment, the alkyl group R ¹ is a linear, preferably unsubstituted, alkyl group having 16 to 18 carbon atoms.

The fatty alcohol alkoxylate, preferably the fatty alcohol ethoxylate, in particular the fatty alcohol ethoxylate of the formulas mentioned, can be present in the detergent in an amount of 0.1 to 20% by weight, preferably 1 to 13% by weight, particularly preferably 3 to 9% by weight on the total weight of the cleaning agent. Such amounts are preferred to ensure adequate grease dissolution and removal.

It is preferred that a nonionic surfactant that can be used in the cleaning agents described herein is present in an absolute amount of 0.1 to 4 g/job, preferably 1 to 3 g/job, in particular 1.2 to 2.2 g/job, for example 1 .5 g/job is included in the composition.

It is particularly preferred that a fatty alcohol ethoxylate of the formula

R ¹ -O-(EO) _m -H,

where R ¹ is a linear or branched, substituted or unsubstituted alkyl group having 12 to 24, in particular 14 to 20, in particular 16 to 18 carbon atoms; EO is an ethylene oxide moiety; and m is 10 to 50, especially 20 to 30, preferably 22 to 27, especially 25; in a

absolute amount of 0.1 to 4 g / job, preferably 1 to 3 g / job, in particular 1.2 to 2.2 g / job, for example 1.5 g / job is contained in the composition.

It is particularly preferred that a fatty alcohol ethoxylate of the formula

R ¹ -O-(EO) _m -H,

where R ¹ is a linear or branched, substituted or unsubstituted alkyl group having 16 to 18 carbon atoms; EO is an ethylene oxide moiety; and m is 20 to 30, preferably 22 to 27, especially 25; is contained in the composition in an absolute amount of 0.1 to 4 g/job, preferably 1 to 3 g/job, in particular 1.2 to 2.2 g/job, for example 1.5 g/job.

The nonionic surfactant is preferably a fatty alcohol ethoxylate which is solid under standard conditions (temperature 25° C., pressure 1013 mbar) and can preferably be used in the form of a powder or granules.

A fatty alcohol alkoxylate of the formula is also suitable as a nonionic surfactant

R2 -(AO ⁾ _w ^-R3 ,

where R ² is a linear or branched, substituted or unsubstituted alkyl group having 8 to 16 carbon atoms; R ³ is H or a linear or branched hydrocarbon radical having 2 to 26 carbon atoms; each A independently represents a radical from the group -CH ₂ CH ₂ - and -CH ₂ -CH(CH ₃ )-, -CH ₂ -CH ₂ -CH ₂ -, -CH ₂ -CH ₂ -CH ₂ -CH ₂ -, -CH ₂ -CH(CH ₂ -CH ₃ )-, -CH ₂ -C(CH ₃ ) ₂ - or -CH ₂ -CH ₂ -CH(CH ₃ )-, where at least one A is -CH ₂ CH ₂ - and at least one A -CH ₂ -CH(CH3)-, -CH ₂ -CH ₂ -CH ₂ -, -CH ₂ -CH ₂ -CH ₂ -CH ₂ -, -CH ₂ -CH(CH ₂ -CH ₃ )-, -CH ₂ -C(CH ₃ ) ₂ - or -CH ₂ -CH ₂ -CH(CH ₃ )-; and w is an integer from 2 to 50, preferably from 10 to 30.

In various embodiments, the ratio of the ethylene oxide units and the higher alkylene oxide units in the fatty alcohol alkoxylate of the formula is 12:1 to 1:1, preferably 10:1 to 2:1, more preferably 6:1 to 3:1. Fatty alcohol alkoxylates of the formula in which R ² is a linear alkyl group having 12-16 carbon atoms and R ³ is H and w=10 to 30 are particularly preferred.

The fatty alcohol alkoxylate of this formula can be contained in the composition, in particular in an amount of 0.01 to 3% by weight, based on the composition. The absolute amount of the fatty alcohol alkoxylate of this formula in the composition can be in particular 0.001 to 3 g/job, preferably 0.01 to 1 g/job, even more preferably 0.1 to 0.5, very particularly preferably 0.2 g/job.

Also suitable as nonionic surfactants are, for example, alkyl glycosides of the general formula RO(G) _x , in which R corresponds to a primary linear or methyl-branched, in particular methyl-branched in the 2-position, aliphatic radical having 8 to 22, preferably 12 to 18 carbon atoms and G corresponds to is a symbol that stands for a glucose unit with 5 or 6 carbon atoms, preferably for glucose. The degree of oligomerization x, which indicates the distribution of monoglycosides and oligoglycosides, is any number between 1 and 10; preferably x is from 1.2 to 1.4.

Another class of nonionic surfactants that can be used are alkoxylated, preferably ethoxylated or ethoxylated and propoxylated, fatty acid alkyl esters, preferably having 1 to 4 carbon atoms in the alkyl chain.

Nonionic surfactants of the amine oxide type, for example N-cocoalkyl-N,N-dimethylamine oxide and N-tallowalkyl-N,N-dihydroxyethylamine oxide, and the fatty acid alkanolamide type can also be suitable. The amount of these nonionic surfactants is preferably not more than that of the ethoxylated fatty alcohols, in particular not more than half of it.

Other suitable surfactants are the polyhydroxy fatty acid amides known as PHFA.

Finally, other low-foaming nonionic surfactants from the group of alkoxylated alcohols can also be used.

A further preferred object is accordingly a cleaning agent, wherein the composition contains nonionic surfactant, preferably in an amount of 0.1 to 20% by weight, particularly preferably 5 to 17% by weight, particularly preferably 7 to 15% by weight , based on the total amount of cleaning agent. In addition, it is preferred that mixtures of different nonionic surfactants are used.

Accordingly, a further preferred object is a cleaning composition, wherein the composition contains nonionic surfactant, wherein the nonionic surfactant is a fatty alcohol ethoxylate of the formula

R ¹ -O-(EO) _m -H

is, where R ¹ is a linear or branched, substituted or unsubstituted alkyl group having 16 to 18 carbon atoms; EO is an ethylene oxide moiety; and m is 20 to 30, preferably 22 to 27, in particular 25, preferably in an amount of 0.1 to 20% by weight, particularly preferably 5 to 16% by weight, particularly preferably 6 to 14% by weight, based on the total amount of composition.

The compositions of the cleaning agents according to the invention can contain other components, preferably at least one other component, preferably selected from the group consisting of other builders, surfactants, polymers, enzymes, corrosion inhibitors, glass corrosion inhibitors, thickeners, foam inhibitors, dyes, disintegration aids, fragrances and perfume carriers, preferably one or more polymers.

Preferred anionic surfactants are fatty alcohol sulfates, fatty alcohol ether sulfates, dialkyl ether sulfates, monoglyceride sulfates, alkyl benzene sulfonates, olefin sulfonates, alkane sulfonates, ether sulfonates, n-alkyl ether sulfonates, ester sulfonates and lignin sulfonates. Fatty acid cyanamides, sulfosuccinates (sulfosuccinic acid esters), in particular sulfosuccinic acid mono- and di-alkyl esters having 8 to 18 carbon atoms, sulfosuccinamates, sulfosuccinamides, fatty acid isethionates, acylaminoalkanesulfonates (fatty acid taurides), fatty acid sarcosinates, ether carboxylic acids and alkyl (ethers) can also be used in the context of the present invention. phosphates and α-sulfofatty acid salts, acylglutamates, monoglyceride disulfates and alkyl ethers of glycerol disulfate.

The anionic surfactants are preferably used as sodium salts, but can also be present as other alkali metal or alkaline earth metal salts, for example potassium or magnesium salts, and in the form of ammonium or mono-, di-, tri- or tetraalkylammonium salts, in the case of sulfonates also in the form of their corresponding acid, e.g. dodecylbenzenesulfonic acid.

The builders that can also be used include, in particular, carbonates, organic co-builders and silicates.

It is possible, for example, to use carbonate(s) and/or hydrogen carbonate(s), preferably alkali metal carbonate(s), particularly preferably sodium carbonate. In various embodiments of the invention, alkali metal carbonates, in particular sodium carbonate, can be present in the cleaning agent in an amount of 1 to 40% by weight, preferably 2 to 30% by weight, based on the total weight of the cleaning agent.

Organic co-builders which should be mentioned in particular are polycarboxylates/polycarboxylic acids, polymeric carboxylates, aspartic acid, polyacetals and dextrins.

Useful organic builder substances are, for example, the polycarboxylic acids which can be used in the form of the free acid and/or their sodium salts, polycarboxylic acids being understood as meaning those carboxylic acids which carry more than one acid function. For example, these are Citric acid, adipic acid, succinic acid, glutaric acid, malic acid, tartaric acid, maleic acid, fumaric acid, sugar acids, aminocarboxylic acids, nitrilotriacetic acid (NTA), provided such use is not objectionable for ecological reasons, and mixtures of these.

If the builders mentioned are used in the detergent composition according to the invention and/or in the detergent portion, their influence on the buffer system that may be present should be taken into account.

Polymeric polycarboxylates are also suitable as builders, for example the alkali metal salts of polyacrylic acid or polymethacrylic acid, for example those with a relative molecular weight of 500 to 70,000 g/mol.

Both homopolymers and copolymers as well as terpolymers can be used, and more complex polymer types are also possible. Suitable polymers are, in particular, polyacrylates and/or copolymers and/or terpolymers containing acrylate monomers, which preferably have a molecular weight of 1000 to 20,000 g/mol. Due to their superior solubility, the short-chain polyacrylates which have molecular weights of 1000 to 10000 g/mol, and particularly preferably of 3000 to 5000 g/mol, may be preferred from this group.

A copolymeric polyacrylate, preferably a sulphopolymer, preferably a copolymeric polysulfonate, preferably a hydrophobically modified copolymeric polysulfonate, is preferably used as the polycarboxylate. The copolymers can have two, three, four or more different monomer units. In addition to monomer(s) containing sulfonic acid groups, preferred copolymeric polysulfonates contain at least one monomer from the group of unsaturated carboxylic acids.

The unsaturated carboxylic acid(s) used is/are particularly preferably unsaturated carboxylic acids of the formula R ¹ (R ² )CC(R ³ )COOH, in which R ¹ to R ³ independently represent -H, -CH ₃ , a straight-chain or branched saturated alkyl radical having 2 to 12 carbon atoms, a straight-chain or branched, mono- or polyunsaturated alkenyl radical having 2 to 12 carbon atoms, with -NH2, -OH or -COOH-substituted alkyl or alkenyl radicals as defined above or for -COOH or -COOR ⁴ where R ⁴ is a saturated or unsaturated, straight-chain or branched hydrocarbon radical having 1 to 12 carbon atoms.

Particularly preferred unsaturated carboxylic acids are acrylic acid, methacrylic acid, ethacrylic acid, α-chloroacrylic acid, α-cyanoacrylic acid, crotonic acid, α-phenylacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, citraconic acid, methylenemalonic acid, sorbic acid, cinnamic acid or mixtures thereof. Of course, the unsaturated dicarboxylic acids can also be used.

In the case of the sulfonic acid group-containing monomers, preference is given to those of the formula R ⁵ (R ⁶ )C═C(R ⁷ )—X—SO ₃ H, in which R ⁵ to R ⁷ independently represent —H, —CH ₃ , a straight-chain or branched saturated alkyl radical having 2 to 12 carbon atoms, straight-chain or branched, mono- or polyunsaturated alkenyl radical having 2 to 12 carbon atoms, alkyl or alkenyl radicals substituted with -NH ₂ , -OH or -COOH or for -COOH or -COOR ⁴ where R ⁴ is a saturated or unsaturated, straight-chain or branched hydrocarbon radical having 1 to 12 carbon atoms, and X is an optionally present spacer group selected from -(CH ₂ ) _n - with n = 0 to 4, -COO -(CH ₂ ) _k - with k = 1 to 6, -C(O)-NH-C(CH ₃ ) ₂ -, -C(O)-NH-C(CH ₃ ) ₂ -CH ₂ - and - C(O)-NH-CH(CH ₃ )-CH ₂ -.

Preferred among these monomers are those of the formulas H ₂ C=CH-X-SO ₃ H, H ₂ C=C(CH ₃ )-X-SO ₃ H or HO ₃ SX-(R ⁶ )C=C(R ⁷ )-X-SO ₃ H in which R ⁶ and R ⁷ are independently selected from -H, -CH ₃ , -CH ₂ CH ₃ , -CH ₂ CH ₂ CH ₃ and -CH(CH ₃ ) ₂ and X stands for an optionally present spacer group selected from -(CH ₂ ) _n - with n = 0 to 4, -COO-(CH ₂ ) _k - with k = 1 to 6, -C(O)-NH-C (CH ₃ ) ₂ -, -C(O)-NH-C(CH ₃ ) ₂ -CH ₂ - and -C(O)-NH-CH(CH ₃ )-CH ₂ -.

According to a particularly preferred embodiment, a polymer comprising acrylamidopropanesulfonic acids, methacrylamidomethylpropanesulfonic acids or acrylamidomethylpropanesulfonic acid can be present as the monomer containing sulfonic acid groups.

Particularly preferred sulfonic acid group-containing monomers are 1-acrylamido-1-propanesulfonic acid, 2-acrylamido-2-propanesulfonic acid, 2-acrylamido-2-methyl-1-propanesulfonic acid, 2-methacrylamido-2-methyl-1-propanesulfonic acid, 3- Methacrylamido-2-hydroxy-propanesulfonic acid, allylsulfonic acid, methallylsulfonic acid, allyloxybenzenesulfonic acid, methallyloxybenzenesulfonic acid, 2-hydroxy-3-(2-propenyloxy)propanesulfonic acid, 2-methyl-2-propen1-sulfonic acid, styrenesulfonic acid, vinylsulfonic acid, 3-sulfopropyl acrylate, 3-sulfopropyl methacrylate , sulfomethacrylamide, sulfomethylmethacrylamide and mixtures of the acids mentioned or their water-soluble salts. In the polymers, some or all of the sulfonic acid groups can be present in neutralized form, ie the acidic hydrogen atom of the sulfonic acid group in some or all of the sulfonic acid groups can be exchanged for metal ions, preferably alkali metal ions and in particular sodium ions. The use of partially or fully neutralized copolymers containing sulfonic acid groups is preferred according to the invention.

The monomer distribution of the copolymers used with preference according to the invention is in the case of copolymers which only contain carboxylic acid groups and sulfonic acid group-containing monomers

Contain monomers, preferably 5 to 95 wt preferably selected from those mentioned above. The molar mass of the sulfo-copolymers preferably used according to the invention can be varied in order to adapt the properties of the polymers to the desired application. Preferred cleaning agents are characterized in that the copolymers have molar masses from 2000 to 200,000 g.mol ^-1 , preferably from 4000 to 25,000 g.mol ^-1 and in particular from 5000 to 15,000 g.mol ^-1 .

In a further preferred embodiment, the copolymers also comprise at least one nonionic, preferably hydrophobic, monomer in addition to monomer containing carboxyl groups and monomer containing sulfonic acid groups.

1. i) Carbonsäuregruppen-haltige Monomere
2. ii) Sulfonsäuregruppen-haltige Monomere
3. iii) nichtionische Monomere, insbesondere hydrophobe Monomere

eingesetzt wird.An anionic copolymer can particularly preferably be contained in one embodiment
wherein as anionic copolymer, a copolymer comprising

1. i) carboxylic acid group-containing monomers
2. ii) sulfonic acid group-containing monomers
3. iii) nonionic monomers, especially hydrophobic monomers

is used.

The nonionic monomers used are preferably monomers of the general formula R ¹ (R ² )C═C(R ³ )—XR ⁴ , in which R ¹ to R ³ independently represent —H, —CH ₃ or —C ₂ H ₅ , X is an optionally present spacer group selected from -CH ₂ -, -C(O)O- and -C(O)-NH-, and R ⁴ is a straight-chain or branched saturated alkyl radical having 2 to 22 carbon atoms or an unsaturated, preferably aromatic radical having 6 to 22 carbon atoms.

Particularly preferred nonionic monomers are butene, isobutene, pentene, 3-methylbutene, 2-methylbutene, cyclopentene, hexene, hexene-1, 2-methylpentene-1, 3-methylpentene-1, cyclohexene, methylcyclopentene, cycloheptene, methylcyclohexene, 2,4 ,4-Trimethylpentene-1, 2,4,4-Trimethylpentene-2,2,3-dimethylhexene-1, 2,4-dimethylhexene-1, 2,5-dimethylhexene-1, 3,5-dimethylhexene-1, 4 ,4-dimethylhexane-1, ethylcyclohexyne, 1-octene, α-olefins having 10 or more carbon atoms such as 1-decene, 1-dodecene, 1-hexadecene, 1-octadecene and C ₂₂ -α-olefin, 2-styrene, α-methylstyrene, 3-methylstyrene, 4-propylstyrene, 4-cyclohexylstyrene, 4-dodecylstyrene, 2-ethyl-4-benzylstyrene, 1-vinylnaphthalene, 2-vinylnaphthalene, methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, pentyl acrylate, hexyl acrylate, methyl methacrylate, N-(methyl )acrylamide, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, N-(2-ethylhexyl)acrylamide, octyl acrylate, octyl methacrylate, N-(octyl)acrylamide, lauryl acrylate, lauryl methacrylate, N-(lauryl)acrylamide, stearyl acrylate, stearyl methacrylate, N-(stearyl)acrylamide, behenyl acrylate, behenyl methacrylate and N-(behenyl)acrylamide or mixtures thereof, in particular acrylic acid, ethyl acrylate, 2-acrylamido-2-methylpropanesulfonic acid (AMPS) and mixtures thereof.

Polyacrylate-containing polymers can be used in amounts of 0.5 to 15% by weight, preferably 0.6 to 10% by weight, particularly preferably in amounts of 0.8 to 3% by weight or 1 to 5% by weight. %, based on the total weight of the composition, be included in the composition. Mixtures of different polymers can also be used here.

The detergents can also contain crystalline layered silicates of the general formula NaMSix O _2x+1 · y H ₂ O as a builder, in which M represents sodium or hydrogen, x is a number from 1.9 to 22, preferably from 1.9 to 4, where particularly preferred values for x are 2, 3 or 4, and y is a number from 0 to 33, preferably from 0 to 20. Amorphous sodium silicates with an Na ₂ O:SiO ₂ modulus of 1:2 to 1:3.3, preferably of 1:2 to 1:2.8 and in particular of 1:2 to 1:2.6, can also be used are preferably delayed in dissolution and have secondary washing properties. In preferred detergents, the content of silicates, based on the total weight of the composition, is limited to amounts below 10% by weight, preferably below 7% by weight and in particular below 5% by weight. Particularly preferred compositions of the detergent portion contain silicate as a builder. Very particularly preferred compositions contain silicate in the amount range specified in part A, based on the total weight of the composition. Furthermore, it is preferred that the amount of silicate, based on the mass of fraction A, is between 5 and 50% by weight, preferably between 10 and 30% by weight, very particularly preferably between 15 and 25% by weight. amounts to.

Perfume oils or fragrances which can be used in the context of the present invention are individual odorant compounds, for example synthetic products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. However, preference is given to using mixtures of different fragrances which together produce an appealing fragrance note. Perfume oils of this type can also contain natural mixtures of fragrances, such as are obtainable from vegetable sources, for example pine, citrus, jasmine, patchouli, rose or ylang-ylang oil.

In preferred embodiments, the detergent portion and/or the detergent composition is phosphate-free and/or phosphonate-free. "Phosphate-free" and "phosphonate-free" as used herein means that the composition in question is essentially free of phosphates or phosphonates, i.e. in particular phosphates or phosphonates in amounts less than 0.1% by weight, preferably less than 0 .01% by weight based on the total portion. It is preferred that a total amount of phosphorus of 0.3 g per job, preferably 0.03 g, is not exceeded.

Therefore, another preferred article is a phosphate- and/or phosphonate-free detergent.

The embodiments described in the context of the agents according to the invention can also be readily transferred to the methods and uses according to the invention and vice versa.

In the following exemplary embodiments, the present invention is explained further in a non-limiting manner.

Examples:

Table 1: Formula example for a cleaning agent according to the invention in solid form Active Ingredient (% by weight unless otherwise stated) etidronic acid 4.5 TAED 4.5 sodium 34.0 sodium citrate 10.0 C16/C18 alcohol polyglycol ether 11.0 Sodium percarbonate 15.0 MnTACN 0.1 Protease (active enzyme protein) 0.4 Amylase (active enzyme protein) 0.2 excipients add 100

As a protease, a protease as in WO 2017/215925 A1 disclosed used.
Stainzyme ^™ Plus Evity 24 T (Novozymes) was used as the amylase.
The ratio of protease to amylase (relative to the amount of active enzyme protein) is 2:1.

Attempt:

A rice dish (risotto) was prepared according to the manufacturer's recipe in a food processor with a cooking function ( ^Thermomix® from Vorwerk). The rice dish was then removed from the pot and the mixing pot soiled in this way was left to dry at room temperature for 2 hours.

1.5 l of water and the cleaning agent were then added to the pot and heated to 60° C. within 5 minutes while stirring (medium number of revolutions). For this purpose, 10 g of the cleaning agent according to Table 1 or 5 ml of commercial dishwashing detergent (Pril Ultra Kraft Gel) were used. The cleaning liquor was then poured out and rinsed once with clear water.

The cleaning result is listed in Table 3. The cleaning was assessed visually from 0 (very poor, hardly any cleaning) to 10 (no residue at all). Table 3: Cleaning result cleanser result comment Hand dishwashing detergent (comparative example) 6.0 Significant remains on the ground, food remains under the knife Cleaning agent according to the invention 9.0 Few grains of rice under the knife Active Ingredient (% by weight unless otherwise stated) etidronic acid 4.5 TAED 4.5 sodium 34.0 sodium citrate 10.0 C16/C18 alcohol polyglycol ether 11.0 Sodium percarbonate 15.0 MnTACN 0.1 Protease (active enzyme protein) 0.5 Amylase (active enzyme protein) 0.25 excipients add 100

Blaze Evity 125 T was used as the protease. Excellence S1000 was used as the amylase.

Claims (12)

Cleaning agent for cleaning kitchen appliances operated by electric motors, in particular with a cooking function, characterized in that it has at least one amylase and at least one protease, the weight ratio of amylase to protease (based in each case on the amount of active enzyme protein) being 1:10 to 5:1 amounts to. Cleaning agent for cleaning kitchen appliances operated by electric motors, in particular with a cooking function, characterized in that it contains at least one amylase and at least one protease, with 0.05 to 1.0% by weight, preferably 0.1 to 0.6% by weight. %, in particular 0.12 to 0.4% by weight, of active amylase enzyme protein (based on the amount of the total composition) can be used. Cleaning agent according to Claim 1 or 2, characterized in that the cleaning agent is present in portion sizes of 5 to 15 g, in particular 7 to 12 g. Cleaning agent according to one of Claims 1 to 3, characterized in that the amount of all amylases, based on the amount of active enzyme protein, in the cleaning liquor is 1 to 100 mg, preferably 5 to 50, in particular 8 to 25 mg of the amylase. Cleaning agent according to at least one of Claims 1 to 4, characterized in that the amount of all proteases, based on the amount of active enzyme protein, in the cleaning liquor is 5 to 800.0 mg, preferably 10 to 200 mg, in particular 15 to 100 mg. Cleaning agent according to at least one of Claims 1 to 5, characterized in that the amylase: protease weight ratio (in each case based on the amount of active enzyme protein) is 1:7 to 2:1, preferably 1:5 to 1:1.5, in particular 1: is 3 to 1:1. Cleaning agent according to at least one of Claims 1 to 6, characterized in that the pH of a 10% solution of the cleaning agent in distilled water at 25°C is 8.5 to 12, in particular 9.5 to 11. Cleaning agent according to at least one of Claims 1 to 6, characterized in that it is a solid cleaning agent which is preferably pre-portioned in a water-soluble casing. Cleaning agent according to at least one of Claims 1 to 8, characterized in that it also contains at least one component selected from surfactants, enzyme stabilizers, solvents, salts, builders, pH stabilizers, corrosion inhibitors, thickeners, foam inhibitors, dyes, fragrances, polymers and perfume carriers , having. Use of a cleaning agent according to at least one of Claims 1 to 9 for cleaning a mixing bowl and/or an agitator of an electric motor-operated food processor. Use according to claim 10 for removing starch stains from stainless steel. Method for cleaning a mixing bowl and/or an agitator of an electric motor-operated food processor, characterized in that a) is a cleaning agent according to at least one of claims 1 to 8 in the mixing bowl and dissolves the cleaning agent in water so that a cleaning liquor is formed, b) allowing the cleaning liquor to act in the mixing bowl over a period of 5 to 10 minutes, with the temperature of the cleaning liquor not exceeding 75 °C, with the agitator possibly being inside the mixing bowl and being in contact with the cleaning liquor, and c) finally rinsing out the mixing bowl and, if necessary, rinsing off the agitator with clear water.