EP3559185A1

EP3559185A1 - Clear-rinse formulation

Info

Publication number: EP3559185A1
Application number: EP17825162.5A
Authority: EP
Inventors: Thomas Weber; Inga Kerstin Vockenroth; Astrid Spitz; Clarissa MAISEY
Original assignee: Henkel AG and Co KGaA
Current assignee: Henkel AG and Co KGaA
Priority date: 2016-12-21
Filing date: 2017-12-13
Publication date: 2019-10-30
Anticipated expiration: 2037-12-13
Also published as: ES2928866T3; PL3559185T3; EP3559185B1; DE102016225904A1; WO2018114508A1

Abstract

The invention relates to agents having improved clear-rinsing performance, containing 5.0 to 20.0 wt.% of a surfactant mixture as defined here, in relation to the total weight of the dishwashing detergent. The invention also relates to the use of this dishwashing detergent and to a dishwashing method using said dishwashing detergent.

Description

"Rinse aid"

The present invention relates to compositions with improved dishwashing performance in dishwashing, the use of these compositions, and a machine dishwashing method

Use of these funds.

Machine-washed dishes are often subject to more stringent requirements today than manually-washed dishes. So even a completely cleaned of leftovers dishes is then rated as not flawless if it has after dishwasher washing whitish, based on water hardness or other mineral salts stains that come from lack of wetting agent from dried water droplets. Such staining and streaking is in principle observable on surfaces of all kinds (porcelain, glass, plastic, stainless steel), but especially on glass surfaces. This harness is the consumer - often by hand - post-treated, which is not very user-friendly. Therefore, there is a need for automatic dishwashing agents that reduce the formation of so-called spotting and filming stains and deposits.

To obtain glossy and spotless dishes are used in dishwashing formulations

Used rinse agent agents. Through a mediated by these agents film formation on the dishes, the water should run as completely as possible from the dishes, so that the surfaces are residue-free and flawless gloss at the end of the wash program. Although the use of such rinse aids is known in the art, there is still a need for

Dishwashing agents that show improved rinse performance.

Furthermore, most of the currently marketed dishwashing detergents show poor drying performance, especially when used on plastic dishes. An improvement in the drying of plastic would thus be an advantageous property of a new dishwashing detergent.

Furthermore, the use of commercially available dishwashing detergents can lead to severe foaming, the limitation of which can be achieved without the use of additional antifungal agents. Foam inhibitors is desirable. The phase stability of dishwashing detergents under different storage bindings can also be problematic. Therefore, it would be desirable for the consumer to have an agent that exhibits increased phase stability, particularly when stored at elevated temperatures.

The object underlying the present invention was therefore to provide a means which solves the above-mentioned problems.

It has now surprisingly been found that the invention used

Combination of nonionic surfactants in rinse aid formulations used in dishwashing will result in improved film formation on dishes surfaces, allowing the water to drain from the dishes in a thin coherent film such that no water drops, streaks or films remain in the subsequent drying process. As a result, the streaking is suppressed on items to be washed and the drying and

Clear rinse performance significantly improved. Furthermore, the formulations according to the invention have improved storage stability, in particular if they are used in the ratio according to the invention. By a small proportion of surfactants used in the compositions of the invention and by the application of the ratio of the surfactants according to the invention to each other, it is possible the amount of the forming foam during the

Washing process significantly limit.

A first aspect of the present invention therefore relates to an agent, in particular a

Rinse aid as used in automatic dishwashing containing, based on the total weight of the dishwashing detergent, 5.0 to 20.0 wt .-%, preferably 6.0 to 15.0 wt .-%, more preferably 7.0 to 12 0% by weight of a surfactant mixture comprising:

(i) at least one nonionic fatty alcohol alkoxylate of the formula R 0 [CH 2 CHR ³ O] x H, wherein R is a linear or branched, saturated alkyl radical having 10 to 18 carbon atoms, preferably 12 to 16 carbon atoms, more preferably 13 to 15 carbon atoms, each R ^{3 is} independently -H or -CH 2 CH ³ and x is 10-20, wherein at least one, preferably at least 5, more preferably at least 9 or 10 R ³ H and at least one or two R ^{3 are} CH 2 CH ³ ; and

(ii) at least one nonionic fatty alcohol ethoxylate of the formula R ² O [CH ² CH ² O] _y H, wherein R ^{2 is} a linear or branched, saturated alkyl radical having 10 to 16 carbon atoms, preferably 12 to 16 or 10 to 14 carbon atoms, more preferably 12 to 14 Carbon atoms, and y is an integer between 3 and 8, preferably between 4 and 7, more preferably 6, wherein the mass ratio of the at least one nonionic surfactant (i) to the at least one nonionic surfactant (ii) is in the range of 1:10 to 2: 1, preferably in the range of 1: 5 to 1: 1, more preferably 1: 4 to 7 : 8, for example at 2: 3.

Likewise provided by the present invention is the use of an agent according to the invention in a machine dishwashing process, in particular the use for

Improving the rinse performance when cleaning dishes in an automatic

Dishwasher.

Yet another subject of the invention is a machine dishwashing process in which an agent according to the invention is used, in particular for the purpose of improving the rinse performance.

Finally, the use of the surfactant mixture used according to the invention for improving the final rinse performance in automatic dishwashing is also the subject of the present invention.

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. Any feature of one aspect of the invention may be employed in any other aspect of the invention. Further, it is to be understood that the examples contained herein are intended to describe and illustrate the invention, but not to limit it, and in particular that the invention is not limited to these examples. Numeric ranges specified in the format "from x to y" include the above values.If multiple preferred numeric ranges are specified in this format, it is understood that all ranges resulting from the combination of the various endpoints, also be recorded.

"At least one" as used herein means 1 or more, ie 1, 2, 3, 4, 5, 6, 7, 8, 9 or more. With respect to an ingredient, the indication refers to the kind of the ingredient and not to the absolute number of molecules. "At least one nonionic surfactant" thus means, for example, at least one type of nonionic surfactant, ie that kind of

nonionic surfactant or a mixture of several different nonionic surfactants. The term, together with weights, refers to all compounds of the type indicated which are included in the composition / mixture, i. that the

Composition beyond the specified amount of the corresponding compounds addition no further compounds of this kind. The agents described herein are preferably phosphate free. "Phosphate free" as used herein means that the subject composition is substantially free of

Phosphates is, i. Phosphates are not deliberately added, in particular phosphates in amounts less than 1 wt .-%, preferably less than 0, 1 wt .-% based on the

Total composition are included. Accordingly, as used herein, "free of" means that the respective fabric is present in amounts less than 1% by weight, preferably less than 0.1% by weight, more preferably less than 0.01% by weight of the In particular, this also means that the corresponding substance is not deliberately added.

All percentages given in connection with the compositions described herein, unless explicitly stated otherwise, relate to% by weight, in each case based on the composition in question.

"Approximately" or "ca." As used herein in connection with a numerical value refers to the numerical value ± 10%, preferably ± 5%.

Whenever alkaline earth metals are referred to below as counterions for monovalent anions, this means that the alkaline earth metal is present only in half - as sufficient to charge balance - amount of substance as the anion.

The agents described herein are dishwashing detergents in the broadest sense, especially those used in automatic dishwashing in automatic dishwashing machines. The term "dishwashing detergent" as used herein thus also encompasses

Rinse aid formulations which are used in addition to the actual detergent formulation. In fact, in various embodiments, the agents of the invention are such rinse aids. These contain, in addition to water as the main solvent and essential ingredient optionally other surfactants and typically fragrance and

Preservatives.

The agents of the invention contain a surfactant mixture containing at least two

low-foaming nonionic surfactants from the group of polyoxyalkylated nonionic surfactants, as defined above comprises.

The first surfactant is at least one nonionic fatty alcohol alkoxylate of the formula

R 0 [CH 2 CHR ³ O] x H, wherein R is a linear or branched, saturated alkyl radical of 10 to 18 carbon atoms, preferably 12 to 16 carbon atoms, more preferably 13 to 15 carbon atoms, each R ^{3 is} independently -H or -CH 2 CH ³ and x is 2-20, wherein at least one, preferably at least 5, more preferably at least 9 or 10 R ³ H and at least one or two R ^{3 are} CH 2 CH ³ . This means that the first surfactant is an ethoxylated / butoxylated fatty alcohol having 10 to 18 carbon atoms in the alkyl radical. Among these, in turn, surfactants with EO-BO blocks are preferred, wherein one to ten EO or 1 -2 BO groups are bonded to each other before a block of the other groups follows. Particular preference is given to nonionic surfactants of the general formula RO [CH ₂ CH ₂ O] x [CH ₂ CH (CH ₂ CH 3) 0] zH

wherein R is as defined above, but is preferably linear, x is 1 to 20, preferably 9 to 20, more preferably 9 to 15, and z is 1 to 5, preferably 1 to 2. Thus, particularly preferred are nonionic surfactants having a C-ms-alkyl radical of 1 to 20, preferably 9 to 20, more preferably 9 to 15 ethylene oxide units, followed by 1 to 5, preferably 1 to 2

Butylene oxide units have.

Such surfactants are available, for example, from BASF under the trade name Plurafac®. A preferred surfactant is Plurafac® LF220 (BASF SE).

In various embodiments of the invention, the above nonionic surfactants may also be end-capped, i. the terminal hydrogen atom of the hydroxyl group is replaced by a C1-20 alkyl radical, preferably C1-4 alkyl radical.

The surfactant mixture additionally comprises at least one second nonionic surfactant of the formula R ² O [CH ² CH ² O] _y H, where R ^{2 is} a linear or branched, preferably linear, saturated alkyl radical having 10 to 16 carbon atoms, preferably 12 to 16 or 10 to 14 carbon atoms, more preferably 12 to 14 carbon atoms, and y is an integer between 3 and 8, preferably between 4 and 7, more preferably 6.

The group of these nonionic surfactants include, for example, C12-14 fatty alcohols with (EO) 4-7, in particular C12-14 fatty alcohol (EO) 6.

Such surfactants are commercially available under the trade names Dehydol® LT and Dehydol® LS from BASF. Dehydol® LS6 (BASF SE) is particularly preferably used.

The mass ratio of the at least one nonionic ethoxylated / butoxylated surfactant to the at least one nonionic ethoxylated surfactant, ie, from the surfactant (i) to the surfactant (ii) ranges from 1:10 to 2: 1, preferably from 1: 5 to 1: 1, more preferably 1: 4 to 7: 8, especially 2: 3. The amount relative to the total weight of the composition for the surfactant (i) is preferably 1 to 10% by weight, preferably 3 to 5% by weight, and for the surfactant (ii) is preferably 1 to 10% by weight, preferably 5 up to 7% by weight. Particularly preferred is a combination of nonionic surfactants according to i) preferably those fatty alcohol alkoxylates having a C-ms-alkyl radical having 1 to 20, preferably 9 to 20, more preferably 9 to 15 ethylene oxide units, followed by 1 to 5, preferably 1 to 2

Butylene oxide units, with nonionic surfactants according to ii), preferably C12-14

Fatty alcohols with (EO) 4-7, in particular C12-14 fatty alcohol (EO) 6 in a mass ratio of preferably 1: 4 to 7: 8, in particular of 2: 3. The amount based on the total weight of the composition is for the surfactant (i) preferably 1 to 10 wt .-%, preferably 3 to 5 wt .-% and for the surfactant (ii) preferably 1 to 10 wt .-%, preferably 5 to 7% by weight.

In addition to the abovementioned nonionic surfactants, the compositions according to the invention may contain surfactants in the surfactant mixture, in particular further nonionic or else anionic surfactants, but also cationic or amphoteric surfactants.

Suitable other nonionic surfactants are, for example, alkyl glycosides, alkoxylated, preferably ethoxylated or ethoxylated and propoxylated fatty acid alkyl esters, but also nonionic surfactants of the amine oxide type. The amount of these nonionic surfactants is preferably not more than that of the alkoxylated fatty alcohols, more preferably not more than half thereof. However, in various embodiments, the agents of the invention contain no nonionic surfactants other than the surfactants (i) and (ii) described in this invention.

Suitable anionic surfactants are all anionic surfactants. 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 lignosulfonates. Also usable

Fatty acid cyanamides, sulfosuccinates (sulfosuccinic acid esters), in particular

Sulfosuccinic acid mono- and di-alkyl esters of 8 to 18 carbon atoms, sulfosuccinamates,

Sulfosuccinamides, fatty acid isethionates, acylaminoalkanesulfonates (fatty acid taurides),

Fatty acid sarcosinates, ether carboxylic acids and alkyl (ether) phosphates and α-sulfofatty acid salts, acylglutamates, monoglyceride disulfates and alkyl ethers of glycerol disulfate. In preferred embodiments, however, the agents of the invention are free of anionic surfactants.

In various preferred embodiments of the agent according to the invention, the pH of the composition is below 7, preferably between 2 and 5, more preferably between 3 and 4.5. In general, the pH of the agent can be adjusted by means of conventional pH regulators. The pH-adjusting agents are acids and / or alkalis. Suitable acids are in particular organic acids such as acetic acid, citric acid, glycolic acid, lactic acid, succinic acid, adipic acid, malic acid, tartaric acid and gluconic acid or amidosulfonic acid. In addition, but also the Mineral acids hydrochloric acid, sulfuric acid and nitric acid or mixtures thereof are used. Suitable bases are selected from the group of alkali and alkaline earth metal hydroxides and carbonates, in particular the alkali metal hydroxides, of which potassium hydroxide and especially sodium hydroxide is preferred. However, particularly preferred is volatile alkali, for example in the form of ammonia and / or alkanolamines, which may contain up to 9 carbon atoms in the molecule. The alkanolamine here is preferably selected from the group consisting of mono-, di-, triethanol- and -propanolamine and mixtures thereof.

To adjust and / or stabilize the pH, the composition according to the invention may also contain one or more buffer substances (INCI Buffering Agents), usually in amounts of 0.001 to 5 wt .-%. Preference is given to buffer substances which are at the same time complexing agents or even chelating agents (chelating agents, INCI chelating agents). Particularly preferred buffer substances are citric acid or citrates, in particular the sodium and potassium lead,

for example, trisodium citrate 2H20 and tripotassium citrate Ή2Ο.

The agents according to the invention may contain at least one, preferably two or more further constituents, preferably selected from the group consisting of builders, enzymes, thickeners, sequestering agents, electrolytes, corrosion inhibitors, in particular silver protectants, glass corrosion inhibitors, polymers, bleaches, bleach activators, foam inhibitors, dyes, fragrances , Bitter substances and antimicrobial agents.

Suitable ingredients are known in the art. Common ingredients of

Rinse aid formulations are especially fragrances and antimicrobial agents

(Preservative) and optionally soluble builders, especially organic builders.

If builders are used, in particular soluble organic builders are used. Useful organic builders are, for example, the polycarboxylic acids which can be used in the form of the free acid and / or their sodium salts, polycarboxylic acids 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, nitrilotriacetic acid (NTA), provided such use is not objectionable for environmental reasons, and mixtures thereof. In addition to their builder effect, the free acids typically also have the property of a

Acidification and thus also serve to set a lower and milder pH of the dishwashing detergent. In particular, here are citric acid, succinic acid,

Glutaric acid, adipic acid, gluconic acid and any mixtures of these. Another important class of phosphate-free builders are aminocarboxylic acids and / or their salts. Particularly preferred representatives of this class are methylglycinediacetic acid (MGDA) or its salts, and glutamic diacetic acid (GLDA) or its salts or Ethylenediaminediacetic acid (EDDS) or its salts. Very particular preference is GLDA or its salts.

The use of citric acid and / or citrates has proved to be particularly advantageous for the cleaning and rinsing performance. Automatic dishwashing agents are therefore preferred according to the invention, characterized in that the agent contains citric acid or a salt of citric acid and that the weight proportion of citric acid or the salt of citric acid is preferably 0.5 to 20 wt.%, Preferably 1 to 15 wt. and in particular between 1 and 10 wt .-% is.

As perfume oils or perfumes, within the scope of the present invention, individual fragrance compounds, e.g. the synthetic products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type are used. Preferably, however, mixtures of different fragrances are used, which together produce an attractive fragrance. Such perfume oils may also contain natural fragrance mixtures such as are available from vegetable sources, e.g. Pine, citrus, jasmine, patchouli, rose or ylang-ylang oil.

Furthermore, preservatives may be included in the compositions. Suitable examples are preservatives from the groups of alcohols, aldehydes, antimicrobial acids and / or their salts, carboxylic acid esters, acid amides, phenols, phenol derivatives, diphenyls,

Diphenylalkanes, urea derivatives, oxygen, nitrogen acetals and formals, benzamidines, isothiazoles and their derivatives such as isothiazolines and isothiazolinones, 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 and peroxides. Preferred antimicrobial agents are preferably selected from the group comprising ethanol, n-propanol, i-propanol, 1,3-butanediol, phenoxyethanol, 1,2-propylene glycol, glycerol, undecylenic acid, citric acid, lactic acid, benzoic acid, salicylic acid, thymol, Benzyl 4-chlorophenol, 2,2'-methylenebis (6-bromo-4-chlorophenol), 2,4,4'-trichloro-2'-hydroxydiphenyl ether, N- (4-chlorophenyl) -N- ( 3,4-dichlorophenyl) urea, N, N '- (1, 10-decanediyldi-1 -pyridinyl-4-ylidene) bis (1-octanamine) dihydrochloride, N, N'-bis (4- Chlorophenyl) -3,12-diimino-2,4,1,1,1,3-tetraazatetradecandiimidamide, antimicrobial quaternary surface active compounds, guanidines. However, particularly preferred preservatives are selected from the group comprising salicylic acid, quaternary surfactants, in particular benzalkonium chloride and isothiazoles and their derivatives such as isothiazolines and isothiazolinones. Solvents that are suitable for the compositions used according to the invention, in addition to water as the preferred solvent generally water-miscible organic solvents, such as, without limitation, ethanol, propanol, 1, 2-propanediol and glycerol.

In general, the preparation of means described herein can be done in different ways. The agents may be in solid or liquid form as well as in a combination of solid and liquid forms. As solid supply forms are especially powder, granules,

Extrudates, compacts, in particular tablets. The liquid supply forms based on water and / or organic solvents may be thickened, in the form of gels. The agents can be formulated in the form of single-phase or multi-phase products. The individual phases of multiphase agents may have the same or different states of matter.

"Liquid" as used herein with respect to the agent of the invention therefore includes all flowable compositions and, in particular, also encompasses gels and pastes

Compositions.

The agents described herein are preferably rinse aid for automatic dishwashing and are in liquid form.

In further preferred embodiments, the amount of a dosage unit of the agent is between 0.1 and 10 ml, preferably between 0.1 and 5 ml, more preferably 3 ml.

Accordingly, the preferred total amount of surfactant used in the final rinse cycle of a dishwashing machine is from 0.05 to 1 g / job, preferably 0.1 to 0.8 g / job, in particular 0.2 to 0.4 g / job, for example 0.3 g / job.

Although not preferred, the agents described herein may be preformed into dosage units. These metering units preferably comprise the amount of cleaning-active substances necessary for a cleaning cycle. The volume of the dosing unit is preferably between 0.1 and 10 ml, preferably between 0.1 and 5 ml and particularly preferably 3 ml. In such embodiments, the prefabricated dosing unit may comprise a water-soluble coating of a water-soluble film material. It is preferable that the water-soluble coating contains polyvinyl alcohol or a polyvinyl alcohol copolymer.

Water-soluble coatings containing polyvinyl alcohol or a polyvinyl alcohol copolymer have good stability with a sufficiently high water solubility, in particular

Cold water solubility, on. Suitable water-soluble films for the preparation of the water-soluble coating are preferably based on a polyvinyl alcohol or a polyvinyl alcohol copolymer and are known in the art. The use of the means according to the invention in automatic dishwashing is likewise an object of the invention. In particular, the use for improving the rinsing performance when cleaning dishes in an automatic dishwasher is recorded.

Likewise, the invention relates to a dishwashing process, in particular machine

Dishwashing process in which an agent according to the invention is used, in particular for the purpose of improving the rinsing performance. The subject matter of the present application is therefore furthermore a process for cleaning dishes in a dishwashing machine, in which the agent according to the invention is metered into the interior of a dishwasher during the passage of a dishwashing program. The metering or the entry of the agent according to the invention into the interior of the dishwasher can be done manually, but preferably the agent is metered by means of the metering chamber into the interior of the dishwasher.

A particularly preferred embodiment is a machine dishwashing process, characterized in that an agent according to one of claims 1 to 7 with a total amount of surfactant of 0.05 to 1 g / job, preferably 0.1 to 0.8 g / job, in particular 0, 2 to 0.4 g / job, for example 0.3 g / job, preferably in the final rinse cycle, is used.

The embodiments described in context with the agents according to the invention are readily transferable to the methods and uses of the invention and vice versa.

Examples:

Example 1: Drying

formulations:

Citric acid monohydrate: 1, 6%

Surfactant: according to the results table

Preservative: 0.05%

Perfume: 0.1%

Water: rest

During drying (tested in a Bosch SMS 68 M 62 with the program ECO 50 ° C

Variospeed) the number of drops is assessed. Higher values indicate a higher number of drops and thus a worse drying result. A significant difference can be expected from a difference of 0.5 or greater.

Second attempt

In addition, it was found during the investigation that the composition containing 8% LS 6 + 2% LF 220 foams more strongly. The formulation with 6% Dehydol LS 6 and 4% Plurafac LF220 provides comparable drying values, but hardly foams. Example 2: rinse performance

Formulations: as Ex. 1, only the amount of surfactant was changed according to the experimental data.

For cleaning in the main rinse was a commercial classic

Detergent tablet, which is not a combination product incl. Rinse aid, used.

For this purpose, the machine (Miele GSL 2, program 50 ° C, 8 min hold time, 65 ° C

Rinsing temperature) is fully opened for 30 minutes after completion of the rinse cycle, and then visually in the black matching room (rating room painted matte black or lined and light-tightly shielded and equipped with 2 fluorescent lighting (Philips TLD 36W / 965 Natural Daylight 6500) certainly.

Rinse-off grades based on the appearance of the dry ware were assigned as parameters (value (1) = worst result - high number of drops, high intensity from drop to value (5) = best result - no drops). The results for the recipes tested are listed in Table 3 as arithmetic mean. Higher values mean less dripping, i. a better rinse performance.

Results: Table 3

Glass stainless steel porcelain plastic

(Friesland)

Spotting (Miele)

8% Dehydol LS 6 4.3 4.4 3.9 2.4

8% Dehydol LS 6 + 5.0 4.8 4.9 3, 1

2% Plurafac LF 220

6% Dehydol LS 6 + 4.9 5.0 4.9 3.3

4% Plurafac LF 220

Filming (Miele)

8% Dehydol LS 6 3.0 3.4 2.9 4.7

8% Dehydol LS 6 + 3.8 3.8 3.9 4.7

2% Plurafac LF 220

6% Dehydol LS 6 + 3.8 3.9 3.7 4.8

4% Plurafac LF 220

Claims

claims:

1. An automatic dishwashing rinse aid comprising, based on the total weight of the dishwashing detergent, from 5.0 to 20.0% by weight, preferably 6.0 to 15.0% by weight, more preferably 7.0 to 12.0% by weight of a surfactant mixture comprising:

(ii) at least one nonionic fatty alcohol ethoxylate of the formula R ² O [CH ² CH ² O] _y H, wherein R ^{2 is} a linear or branched, saturated alkyl radical having 10 to 16 carbon atoms, preferably 12 to 16 or 10 to 14 carbon atoms, more preferably 12 to 14 Carbon atoms, and y is an integer between 3 and 8, preferably between 4 and 7, more preferably 6,

wherein the mass ratio of the at least one nonionic surfactant (i) to the at least one nonionic surfactant (ii) is in the range of 1:10 to 2: 1, preferably in the range of 1: 5 to 1: 1, more preferably 1: 4 to 7 : 8, for example at 2: 3.

2. Composition according to claim 1, characterized in that surfactant (i) a compound of

Formula R 0 [CH ₂ CH ₂ O] x [CH ₂ CH (CH ₂ CH ₃ ) 0] z H in which R is as defined above, in particular C 13-15 alkyl, x is 1 to 20, preferably 9 to 20, more preferably 9 to 15, and z is 1 to 5, preferably 1 to 2.

3. Composition according to claim 1 or 2, characterized in that surfactant (ii) a C12-14

Fatty alcohol with (EO) 4-7, especially a C12-14 fatty alcohol (EO) 6.

4. Composition according to one of claims 1 to 3, characterized in that the pH of the composition is below 7, preferably between 2 and 5, more preferably between 3 and 4.5.

5. Composition according to one of claims 1 to 4, characterized in that a

Dosage unit of the composition is between 0.1 and 10 ml, preferably between 0.1 and 5 ml, more preferably 3 ml.

6. Composition according to one of claims 1 to 5, characterized in that in each case based on the total weight of the composition, the surfactant (i) in an amount of 1 to 10 wt .-%, preferably 3 to 5 wt .-% and / or the surfactant (ii) is contained in an amount of 1 to 10% by weight, preferably 5 to 7% by weight.

7. Composition according to one of claims 1 to 6, characterized in that the surfactant mixture further surfactants, in particular further nonionic, anionic, cationic and / or amphoteric surfactants, and / or the agent at least one further constituent, preferably at least two further constituents selected from the group consisting of builders, enzymes, thickeners, sequestering agents, electrolytes, corrosion inhibitors, in particular silver protectants, glass corrosion inhibitors, polymers, bleaches, bleach activators, foam inhibitors, dyes, perfumes, bitter substances and antimicrobial agents.

8. Use of a composition according to any one of claims 1 to 7 in one

Dishwashing process, in particular a machine dishwashing process.

9. Dishwashing process, in particular machine dishwashing, thereby

in that a means according to one of claims 1 to 7 is used.

10. Machine dishwashing method according to claim 9, characterized in that an agent according to one of claims 1 to 7 with a total amount of from 0.05 to 1 g / job, preferably 0.1 to 0.8 g / job, in particular 0.2 to 0.4 g / job, for example 0.3 g / job, preferably in the final rinse cycle, is used.