WO2015120990A1

WO2015120990A1 - Acid cleaner for hard surfaces

Info

Publication number: WO2015120990A1
Application number: PCT/EP2015/000336
Authority: WO
Inventors: Carsten Cohrs
Original assignee: Clariant International Ltd
Priority date: 2014-02-17
Filing date: 2015-02-16
Publication date: 2015-08-20

Abstract

The invention relates to the use of N-methyl-N-acylglucamines in compositions for cleaning hard surfaces, having a pH value < 6, the proportion of the glucamines with C8-C14-acyl groups being at least 80 wt. % and the proportion of glucamines with C8-C10-acyl groups is more than 50 wt. %, respectively in relation to the total amount of glucamines. The invention also relates to corresponding compositions.

Description

Acid cleaner for hard surfaces

The invention relates to acidic hard surface cleaners whose surfactant system contains nonionic specific glucamides which are very good

Kalkkutzentfernung and are compatible with the typical surfaces in kitchens and bathrooms.

Acid cleaners have long been used to clean hard surfaces in bathrooms and kitchens because of their acidity, they have good limescale and limescale deliquescence properties. The cleaning result depends on the one hand on acidity and acidity, on the other hand of the

Wetting power and lime soap dispersibility of the surfactants used. In addition, the cleaner usually contains solvents, which also for

Cleaning results, as well as fragrance, dyes and auxiliaries.

DE 10 2009 001 559 (A) describes acidic cleaners which contain mixtures of different acids and have a pH of 1-2. Suitable surfactants include nonionic surfactants such as fatty alcohol ethoxylates, but also

Sugar surfactants, in particular alkylpolyglycosides, especially decylglucoside for

Commitment. US2005 / 0239674 describes hard surface cleaners which contain colloidal silica particles and which may have an acidic pH by addition of organic acids. The surfactant system consists of anionic and nonionic surfactants, in particular fatty alcohol ethoxylates or

Alkylpolyglycosides. US 2012/0213759 describes antimicrobial acid cleaners which contain organic acids and whose surfactant system may contain anionic surfactants and / or nonionic surfactants. Nonionic surfactants are fatty alcohol ethoxylates and particularly preferably alkyl polyglycosides. The three documents mentioned also mention the possible use of

Fatty acid glucamides of undefined chain length mentioned but not exemplified.

WO 00/29531 describes neutral to slightly acidic bath cleaners which

Fatty acid glucamides or alkyl polyglycosides in 0.1% - 3%. The Glucamides contain C6-C32-, more preferably C12-C20 fatty acid residues and are substituted on the nitrogen with C1-C4-Al kylresten, in particular methyl. The cleaners must also contain complexing agents such as EDTA to remove calcareous soils. The acidic pH is created by using acid complexing agents.

Although good results are already achieved with the known systems, there is still a wide room for improvement. So it is desirable in the formulation that at the same

Total of a minimum amount of acid is used to reduce the risk of skin and eye irritation in the user,

especially in the household, but also to avoid damage to treated or even accidentally coming into contact with the cleaner surfaces. For cost reasons, the lowest possible amounts of surfactant should be used. As well as the surfactants typical in the kitchen and in the

Plumbing can attack used materials, especially in frequent to daily ("Daily Shower") used cleaners a mild

Surfactant system desired. Recently, for environmental reasons, a stronger use of renewable raw materials is required, which is often bought by loss of cleaning performance. Also of interest is that

Foam image after spraying, which varies depending on the surfactant.

The object of the invention was to provide a cleaner for hard surfaces with high lime and Kalkseifendispersiervermögen at low acid, mild pH values, which contains a high proportion of renewable raw materials.

It has now been found that specific N-methyl-N-acylglucamine with a high proportion of C8-C14-acyl, in particular a high proportion of C8-C10-acyl, are particularly suitable for acidic cleaners. It was surprising that these have an improved limescale removal and material compatibility compared to fatty alcohol ethoxylates. Equally surprising was that this Glucamides also have improved dirt removal compared to the alkylpolyglycosides of the same chain length which are widely used in the art, without this being accompanied by a stronger attack on the surfaces, as in the case of the comparable ethoxylates.

The invention therefore relates to the use of N-methyl-N-acylglucaminen in compositions for cleaning hard surfaces, having a pH <6, wherein the proportion of glucamines with C8-C14 acyl groups at least 80 wt .-% and the proportion the glucamine with C8-C10-acyl groups more than 50 wt .-%, each based on the total amount of glucamines ..

The invention further provides a composition for cleaning hard surfaces, comprising a) one or more N-methyl-N-acylglucamines of the formula (I),

in which R is a linear or branched, saturated or unsaturated C5-C21-alkyl radical, wherein the proportion of glucamines having C7-C13 alkyl radicals R more than 80 wt .-% and the proportion of glucamins with C7-C9 alkyl radicals R more as 50 wt .-%, each based on the total amount of glucamins, is, as component A, one or more inorganic or organic acids as

Component B,

optionally one or more anionic surfactants as component C, optionally one or more further surfactants other than components A and C as component D, e) optionally one or more complexing agents as component E, f) optionally one or more solvents other than water as component F,

g) optionally one or more further additives, such as viscosity regulators, enzymes, bleaches, preservatives, fragrances and dyes, as

Component G and

h) water as component H,

wherein the composition has a pH of less than 6. The invention likewise relates to a method for cleaning a hard surface, wherein the surface is in contact with an inventive

Composition is brought.

The compositions according to the invention show one opposite

Fatty alcohol ethoxylates improved limescale removal and

Material compatibility. Likewise, the inventively used

Glucamides over those widely used in the art

Alkylpolyglycosides of the same chain length improved dirt removal, without this being accompanied as in the comparable ethoxylates with a stronger attack on the surfaces.

Thus, bathroom cleaners with a high proportion of renewable raw materials without sacrificing high cleaning performance or material damage

Will be provided.

The term "hard surface" in the sense of the invention means a surface of dimensionally stable materials, for example of plastic, ceramic, natural stone, glass, wood, linoleum and metal, typically surfaces in the kitchen and sanitary sector, for example in kitchens, bathrooms and Toilets, in the household but also in the industrial sector, for example in butchers, slaughterhouses, dairies, storage tanks for food or industrial products, as well as in public areas, such as building facades, swimming pools or train stations. Component A

N-methyl-N-acylglucamine used according to the invention are those of

Formula (I),

wherein R is a linear or branched, saturated or unsaturated C5-C21 alkyl radical, in the case of C8-C14 acylglucamines thus a C7-C13-alkyl or a corresponding mono- or polyunsaturated alkenyl radical.

The N-methyl-N-acylglucamine used in the invention contain

at least 80% by weight of N-methyl-N-acylglucamines containing a C8-C14 acyl group, the proportion of C8-C10 glucamines being more than 50% by weight. Weight percentages in connection with the glucamines according to the invention always refer to the total amount of glucamines in the composition. The compositions generally contain no further glucamines apart from component A. Particularly preferably, the proportion of N-methyl-N-acylglucaminen containing a C8-C14-Acy Ig group, at least 90 wt .-%. In addition, the N-methyl-N-acylglucamine used in the invention contain small amounts of short-chain and / or

long-chain fatty acid derived N-methyl-N-acylglucaminen, especially those which contain C1-C4-acyl, C6-acyl, C18-acyl and / or C20-acyl. In a particularly preferred embodiment of the invention, N-methyl-N-acylglucamine be used in which at least 80 wt .-% of N-methyl-N-acylglucamine a C8 acyl or a C10 acyl group.

In a further embodiment of the invention, N-methyl-N-acylglucamines are used which consist exclusively of N-acyl-N-methyl-N-glucamines which contain a C8-acyl, C10-acyl, C12-acyl, a C14-acyl group or a mixture of two or more of these compounds. According to the invention, the proportion of glucamines having C 8 and / or C 10 acyl groups is more than 50% by weight, ie a ratio of> 1: 1, preferably> 2: 1, more preferably> 3: 1 and particularly preferably> 4: 1 versus glucamines with C12-C14 acyl groups.

The N-methyl-N-acylglucamine can, as described in EP 0 550 637 B1, by reacting the corresponding fatty acid esters or

Fatty acid ester mixtures with N-methylglucamine in the presence of a

Hydroxyl or alkoxylated solvent can be prepared. Suitable solvents are, for example, C 1 -C 4 -monoalcohols, ethylene glycol, propylene glycol, glycerol and alkoxylated alcohols. Preference is 1, 2-propylene glycol. N-methylglucamine, as also described in EP 0 550 637 A1, can be obtained by reductive amination of glucose with methylamine.

Suitable fatty acid esters which are reacted with the N-methylglucamines to give N-methyl-N-acylglucamines are generally the methyl esters which are obtained by transesterification from natural fats and oils, for example

Triglycerides.

Suitable raw materials for the production of fatty acid methyl esters are

for example, coconut oil or palm oil.

The N-methyl-N-acylglucamine are in the inventive

Compositions generally in amounts of 0.01 to 10 weight percent, preferably 0.1-5, more preferably 1-3 wt .-% (based on the total composition).

Component B The acids may be inorganic acids, e.g. Hydrochloric acid,

Sulfuric acid, nitric acid, sulfamic acid and / or phosphoric acid act. In a preferred embodiment, the acids containing are organic acids, more preferably non-complexing acids such as lactic acid, formic acid, acetic acid, glycolic acid and / or gluconic acid. Further

Preferred acids are malic acid, citric acid, tartaric acid, adipic acid and / or succinic acid. In a preferred embodiment, the composition contains an acid. In another preferred embodiment, the composition contains a mixture of two or more acids.

The amount of acid used is generally from 0.1% to 10% by weight, preferably from 0.2 to 5% by weight, particularly preferably from 1 to 3% by weight, based on the total composition.

In a further preferred embodiment, a salt of an acid may also be added for buffering the pH, in particular the sodium, potassium or magnesium salt, but also further alkali or alkaline earth salts or else ammonium salts, in particular volatile amines such as monoethanolamine,

Ammonia, diethanolamine, but also triethanolamine. In a particularly preferred embodiment, the salt or salts of the acid or acids already present are used. Due to the presence of the acid (s), the pH of the

compositions according to the invention less than 6, preferably 2 to 6, in particular 3 to 5, particularly preferably 3 to 4.

Component C

The compositions of the invention may optionally contain anionic surfactants, e.g. B. alkylbenzenesulfonates, alkyl sulfates, alkyl ether sulfates, alkanesulfonates, alkyl ether carboxylic acids, sulfosuccinates, isethionates, taurates, glycinates and / or Contain acylglutamate. The alkyl chains of the surfactants mentioned may be of synthetic or natural origin and consist of 8 to 30, preferably 8 to 18, in particular 12 to 14 carbon atoms in linear or branched

Arrangement.

Anionic surfactants which are used according to the invention are preferably aliphatic sulfates, such as fatty alcohol sulfates, fatty alcohol ether sulfates,

Dialkyl ether sulfates, monoglyceride sulfates and aliphatic sulfonates such

Alkanesulfonates, olefin sulfonates, ether sulfonates, n-alkyl ether sulfonates,

Estersulfonate and lignosulfonates. Also usable in the context of the present invention are alkylbenzenesulfonates, fatty acid cyanamides,

Sulfosuccinates (sulfosuccinic acid esters), sulfosuccinamates, sulfosuccinamides, fatty acid isethionates, acylaminoalkanesulfonates (fatty acid taurides),

Fatty acid sarcosinates, ether carboxylic acids and alkyl (ether) phosphates and

[alpha] sulfo fatty acid salts, acyl glutamates, monoglyceride disulfates and alkyl ethers of glycerol disulfate.

Preferred thereof are the fatty alcohol sulfates and / or fatty alcohol ether sulfates, in particular the fatty alcohol sulfates. Fatty alcohol sulfates are products of

Sulfation reactions on corresponding alcohols while

Fatty alcohol ether sulfates Products of sulfation reactions on alkoxylated

Alcohols are. The skilled worker generally understands by alkoxylated

Alcohols the reaction products of alkylene oxide, preferably ethylene oxide, with alcohols, in the context of the present invention preferably with longer-chain alcohols. In general, from n moles of ethylene oxide and one mole of alcohol, depending on the reaction conditions, a complex mixture of

Addition products of different degrees of ethoxylation. Another

Embodiment of the alkoxylation is the use of mixtures of

Alkylene oxides, preferably the mixture of ethylene oxide and propylene oxide.

Preferred fatty alcohol ether sulfates are the sulfates lower ethoxylated

Fatty alcohols having 1 to 4 ethylene oxide units (EO), in particular 1 to 2 EO, for example 1, 3 EO. Particularly preferred are alkylbenzenesulfonate, alkanesulfonate, alkyl ether sulfate or alkyl sulfate.

The anionic surfactants are usually used as salts, but also as acid. The salts are preferably alkali metal salts, alkaline earth metal salts, ammonium salts and mono-, di- or

Trialkanolammoniumsalze, for example, mono-, di- or

Triethanolammoniumsalze, in particular lithium, sodium, potassium or ammonium salts, particularly preferably sodium or potassium salts, particularly preferably sodium salts.

In a preferred embodiment, the composition contains only an anionic surfactant in addition to the N-methyl-N-acylglucamines of component A. The proportion of component C in the total composition, when different from 0%, is generally from 0.1 to 10 Wt .-%, preferably 0.1 to 3 wt .-%, particularly preferably 0.5 to 1, 5 wt .-%.

Component D

Further surfactants D other than components A and C may be nonionic, amphoteric and / or cationic surfactants, for example betaines, amidobetaines, amine oxides, amidoamine oxides, fatty alcohol polyglycol ethers, alkylpolyglycosides or even quaternary ammonium compounds.

In a preferred embodiment, the inventive

Compositions no alkylpolyglycosides and fatty alcohol polyglycol ethers, more preferably no nonionic surfactants except the N-methyl-N-acylglucaminen of component A.

In a further preferred embodiment, the composition contains no further surfactant in addition to the N-methyl-N-acylglucaminen of component A and optionally an anionic surfactant of component B. Further nonionic surfactants may be, for example, alkoxylates, such as polyglycol ethers, fatty alcohol polyglycol ethers (fatty alcohol alkoxylates),

Alkylphenol polyglycol ethers, end-capped polyglycol ethers, mixed ethers and hydroxy mixed ethers and fatty acid polyglycol esters. Also usable are ethylene oxide, propylene oxide, block polymers and fatty acid alkanolamides and

Fatty acid polyglycol. Another important class of nonionic surfactants that can be used according to the invention are the polyol surfactants, and in particular the glycated surfactants, such as alkyl polyglycosides, in particular

Alkylpolyglucosides.

Suitable fatty alcohol polyglycol ethers are with ethylene oxide (EO) and / or

Propylene oxide (PO) alkoxylated, unbranched or branched, saturated or unsaturated C8-22 alcohols having a degree of alkoxylation of up to 30,

preferably ethoxylated C10-18-fatty alcohols having a degree of ethoxylation of less than 30, preferably 1 to 20, in particular 1 to 12, more preferably 1 to 8, for example C12-14-fatty alcohol ethoxylates with 8 EO.

Alkyl polyglycosides are surfactants produced by the reaction of sugars and

Alcohols according to the relevant procedures of preparative organic

Chemistry can be obtained, depending on the nature of the preparation to a mixture of monoalkylated, oligomeric or polymeric sugar. Preferred alkylpolyglycosides are the alkylpolyglucosides, wherein particularly preferably the alcohol is a long-chain fatty alcohol or a mixture of long-chain fatty alcohols with branched or unbranched C8 to C18-alkyl chains and the

Degree of oligomerization (DP) of the sugars is between 1 and 10, preferably 1 to 6, in particular 1, 1 to 3, particularly preferably 1, 1 to 1, 7,

for example, C8-10 alkyl-1, 5-glucoside (DP of 1, 5). The amphoteric surfactants (zwitterionic surfactants) which can be used according to the invention include betaines, amine oxides, alkylamidoalkylamines, alkyl-substituted amino acids, acylated amino acids or biosurfactants. Suitable betaines are the alkylbetaines, the alkylamidobetaines, the

Imidazoliniumbetaine, the sulfobetaines (INCI Sultaines) and the amidosulfobetaines and the phosphobetaines. Examples of suitable betaines and sulfobetaines are the following compounds named according to INCI: almondamidopropyl betaines, apricotamidopropylbetaines, avocadamidopropylbetaines,

Babassuamidopropylbetaine, behenamidopropylbetaine, behenylbetaine, betaine, canolamidopropylbetaine, caprylic / capramidopropylbetaine, carnitine,

Cetylbetaines, cocamidoethylbetaines, cocamidopropylbetaines,

Cocamidopropyl hydroxysultaine, cocobetaines, coco-hydroxysultaine,

Coco / Oleamidopropylbetaine, Coco-Sultaine, Decylbetaine,

Dihydroxyethyloleylglycinate, dihydroxyethyl soy glycinate,

Dihydroxyethylstearylglycinate, Dihydroxyethyl Tallow Glycinate, Dimethicone Propyl PG-Betaine, Erucamidopropyl Hydroxysultaine, Hydrogenated Tallow

Betaines, isostearamidopropylbetaines, lauramidopropylbetaines, laurylbetaines, laurylhydroxysultaines, laurylsultaine, milkamidopropylbetaines,

Minkamidopropylbetaine, myristamidopropylbetaine, myristylbetaine,

Oleamidopropylbetaines, oleamidopropylhydroxysultaines, oleylbetaines,

Olivamidopropyl betaines, palmamidopropyl betaines, palmitamidopropyl betaines, palmitoyl carnitines, palm kernel amidopropyl betaines, polytetrafluoroethylene acetoxypropyl betaines, ricinoleamidopropyl betaines, sesamidopropyl betaines, soy amidopropyl betaines, stearamidopropyl betaines, stearyl betaines,

Tallowamidopropylbetaine, tallowamidopropylhydroxysultaine, tallowbetaine, tallowdihydroxyethylbetaine, undecylenamidopropylbetaine and wheat

Germamidopropyl Betaine.

The amine oxides suitable according to the invention include alkylamine oxides, in particular alkyldimethylamine oxides, alkylamidoamine oxides and

Alkoxyalkyl. Examples of suitable amine oxides are the following named according to INCI

Compounds: Almondamidopropylamine Oxide, Babassuamidopropylamine Oxide, Behenamine Oxide, Cocamidopropyl Amine Oxide, Cocamidopropylamine Oxide, Cocamine Oxide, Coco-Morpholine Oxide, Decylamine Oxide, Decyltetradecylamines Oxides, Diaminopyrimidines Oxides, Dihydroxyethyl C8-10 Alkoxypropylamines Oxides, Dihydroxyethyl C9-11 Alkoxypropylamines Oxides, Dihydroxyethyl C12-15 Alkoxypropylamines Oxides, Dihydroxyethyl Cocamines Oxide, Dihydroxyethyl Lauramine Oxide, Dihydroxyethyl Stearamine Oxide, Dihydroxyethyl Tallowamine Oxide, Hydrogenated Palm Kernel Amine Oxide, Hydrogenated Tallowamine oxides, hydroxyethyl hydroxypropyl C12-15

Alkoxypropylamines oxides, isostearamidopropylamine oxides, isostearamidopropyl morpholine oxides, lauramidopropylamine oxides, lauramine oxides, methyl morpholine oxides, milkamidopropyl amines oxides, minkamidopropylamine oxides, myristamidopropylamine oxides, myristamine oxides, myristyl / cetyl amine oxides, oleamidopropylamine oxides, oleamine oxides, olivamidopropylamine oxides, palmitamidopropylamine oxides , Palmitamine Oxide, PEG-3 Lauramine Oxide, Potassium Dihydroxyethyl Cocamine Oxide Phosphate, Potassium

Trisphosphonomethylamine oxides, sesamidopropylamine oxides,

Soyamidopropylamine Oxide, Stearamidopropylamine Oxide, Stearamine Oxide, Tallowamidopropylamine Oxide, Tallowamine Oxide, Undecylenamidopropylamine Oxide and Wheat Germamidopropylamine Oxide.

Exemplary alkylamidoalkylamines are the following compounds designated according to INCI: cocoamphodipropionic acid, cocobetainamido amphopropionate, DEA-cocoamphodipropionate, disodium caproamphodiacetate, disodium

Caproamphodipropionate, Disodium Capryloamphodiacetate, Disodium

Capryloamphodipropionate, disodium

Cocoamphocarboxyethylhydroxypropylsulfonate, Disodium Cocoamphodiacetate, Disodium Cocoamphodipropionate, Disodium Isostearoamphodiacetate, Disodium Isostearoamphodipropionate, Disodium Laureth-5 Carboxyamphodiacetate, Disodium Lauroamphodiacetate, Disodium Lauroamphodipropionate, Disodium Oleoamphodipropionate, Disodium PPG-2-lsodeceth-7 Carboxyamphodiacetate, Disodium Stearoamphodiacetate, Disodium Tallowamphodiacetate, Disodium Wheatgermamphodiacetate, Lauroamphodipropionic Acid , Quaternium-85, Sodium Caproamphoacetate, Sodium Caproamphohydroxypropylsulfonate, Sodium Caproamphopropionate, Sodium Capryloamphoacetate, Sodium

Capryloamphohydroxypropylsulfonate, Sodium Capryloamphopropionate, Sodium Cocoamphoacetate, sodium cocoamphohydroxypropylsulfonate, sodium

Cocoamphopropionate, Sodium Cornamphopropionate, Sodium

Isostearoamphoacetate, Sodium Isostearoamphopropionate, Sodium

Lauroamphoacetate, sodium Lauroamphohydroxypropylsulfonate, Sodium

Lauroampho PG-Acetate Phosphate, Sodium Lauroamphopropionate, Sodium Yristoamphoacetate, Sodium Oleoamphoacetate, Sodium

Oleoamphohydroxypropylsulfonates, Sodium Oleoamphopropionate, Sodium Ricinoleoamphoacetate, Sodium Stearoamphoacetate, Sodium

Stearoamphohydroxypropylsulfonate, Sodium Stearoamphopropionate, Sodium Tallamphopropionate, Sodium Tallowamphoacetate, Sodium

Undecylenoamphoacetate, Sodium Undecylenoamphopropionate, Sodium Wheat Germamphoacetate and Trisodium Lauroampho PG-Acetate Chloride Phosphate.

Exemplary alkyl-substituted amino acids are the following compounds designated as INCI: aminopropyl laurylglutamine, cocaminobutyric acid, cocaminopropionic acid, DEA-lauraminopropionate, disodium cocaminopropyl iminodiacetate, disodium dicarboxyethyl cocopropylenediamine, disodium

Lauriminodipropionate, Disodium Steariminodipropionate, Disodium

Tallowiminodipropionate, Lauraminopropionic Acid, Lauryl Aminopropylglycine, Lauryl Diethylenediaminoglycine, Myristaminopropionic Acid, Sodium C12-15 Alkoxypropyl Iminodipropionate, Sodium Cocaminopropionate, Sodium

Lauraminopropionate, Sodium Lauriminodipropionate, Sodium Lauroyl

Methylaminopropionate, TEA-Lauraminopropionate and

TEA Myristaminopropionate.

The proportion of the component D in the total composition, when different from 0%, is generally from 0.1 to 10% by weight, preferably from 0.1 to 3.0% by weight, more preferably from 0.1 to 1, 0 wt .-%. Component E

Suitable complexing agents are known to the person skilled in the art and are described by way of example in DE-A 10 2009 001 559. INCI chelating agents, also called sequestrants, are ingredients that are capable of complexing and inactivating metal ions to their detrimental effects on the stability or appearance of the agents,

for example, cloudiness, to prevent. On the one hand, it is important to complex the incompatible with numerous ingredients calcium and magnesium ions of water hardness. On the other hand, the complexation of the ions of heavy metals such as iron or copper delays the oxidative decomposition of the finished agents. In addition, the complexing agents support the cleaning effect.

For example, the following are suitable according to INCI

Complexing agents: aminotrimethylene, phosphonic acid, beta-alanine diacetic acid, calcium disodium EDTA, citric acid, cyclodextrin, cyclohexanediamine

Tetraacetic Acid, Diammonium Citrate, Diammonium EDTA, Diethylenetriamine Pentamethylene Phosphonic Acid, Dipotassium EDTA, Disodium Azacycloheptane Diphosphonate, Disodium EDTA, Disodium Pyrophosphate, EDTA, Etidronic Acid, Galactic Acid, Gluconic Acid, Glucuronic Acid, HEDTA, Hydroxypropyl

Cyclodextrin, Methyl Cyclodextrin, Pentapotassium Triphosphate, Pentasodium Aminotrimethylene Phosphonate, Pentasodium Ethylenediamine Tetramethylene Phosphonate, Pentasodium Pentetate, Pentasodium Triphosphate, Pentetic Acid, Phytic Acid, Potassium Citrate, Potassium EDTMP, Potassium Gluconate,

Potassium Polyphosphates, Potassium Trisphosphonomethylamine Oxides, Ribonic Acid, Sodium Chitosan Methylene Phosphonates, Sodium Citrate, Sodium

Diethylenetriamine Pentamethylene phosphonates, sodium

Dihydroxyethylglycinate, Sodium EDTMP, Sodium Gluceptate, Sodium Gluconate, Sodium Glycereth-1 Polyphosphate, Sodium Hexametaphosphate, Sodium

Metaphosphates, Sodium Metasilicate, Sodium Phytate, Sodium

Polydimethylglycinophenolsulfonates, sodium trimetaphosphates, TEA-EDTA, TEA polyphosphates, tetra hydroxyethyl ethylene di diamines, tetrahydroxypropyl ethylene di diamines, tetrapotassium etidronates, tetrapotassium pyrophosphates, tetrasodium EDTA, tetrasodium etidronates, tetrasodium pyrophosphates,

Tripotassium EDTA, Trisodium Dicarboxymethyl Alaninate, Trisodium EDTA, Trisodium HEDTA, Trisodium NTA and Trisodium Phosphate. The composition according to the invention preferably contains at least one complexing agent E. The proportion of component E in the total composition, if it is different from 0%, is generally 0.1 to 10% by weight, preferably 0.1 to 3.0% by weight .-%, particularly preferably 0.1 to 1, 0 wt .-%.

Component F

Suitable water-soluble solvents are known to the person skilled in the art and are described by way of example in US Pat. No. 2005 0239674. Preferably come

Alcohols, glycerol, glycols and glycol ethers are used, preferably lower alcohols such as ethanol, isopropanol, butanol, isobutanol or Alkylenlykole, z. For example, propylene glycol, and glycol ethers, z. B. ethylene glycol n-nutyl ether or

Propylenglkol-n-butyl ether. In a preferred embodiment come

Mixtures of several solvents used.

The proportion of the component F in the total composition, if it is different from 0%, is generally 0.1 to 10% by weight, preferably 0.1 to 3% by weight, particularly preferably 0.5 to 1, 5% by weight.

Component G Suitable additives are further customary ingredients of cleaning agents, for example disinfectants, pH regulators, dyes, fragrances, buffers, viscosity regulators, corrosion inhibitors, organic and inorganic salts, optical brighteners, bleaching agents, antioxidants, opacifiers, hydrotropes, abrasives, preservatives, oxidizing agents and / or insecticides. These additives are well known to the person skilled in the art and are described by way of example in DE-A 10 2009 001 559. According to the invention, bleaching agents can be added to the composition. Suitable bleaching agents include peroxides, peracids and / or perborates, particularly preferred is H2O2. The composition may also contain enzymes, preferably proteases, lipases, amylases, hydrolases and / or cellulases. You can do that

agents according to the invention may be added in any form established according to the prior art. In the case of liquid or gel-containing compositions, these include, in particular, solutions of the enzymes, advantageously as concentrated as possible, sparing in water and / or added with stabilizers. Alternatively, the enzymes may be encapsulated, for example, by spray-drying or extruding the enzyme solution together with a preferably natural polymer or in the form of capsules, for example those in which the enzymes are entrapped as in a solidified gel or in core-shell type in which an enzyme-containing core is coated with a water, air and / or chemical impermeable protective layer. In deposited layers, additional active ingredients, for example stabilizers, emulsifiers,

Pigments, bleaches or dyes are applied. Such capsules are prepared by methods known per se, for example by shaking or

Roll granulation or applied in fluid-bed processes. Advantageously, such granules, for example by applying polymeric film-forming agent, low in dust and storage stable due to the coating.

Furthermore, enzyme-containing enzyme stabilizers may be present to provide an enzyme contained in a composition of the invention

Damage such as inactivation, denaturation or decay about to be protected by physical influences, oxidation or proteolytic cleavage. Suitable enzyme stabilizers, in each case depending on the enzyme used, are in particular: benzamidine hydrochloride, borax, boric acids, boronic acids or their salts or esters, especially derivatives with aromatic groups, for example substituted phenylboronic acids or their salts or esters; Peptide aldehydes (oligopeptides with reduced C-terminus),

Amino alcohols such as mono-, di-, triethanol- and -propanolamine and their Mixtures, aliphatic carboxylic acids up to C12, such as succinic acid, other dicarboxylic acids or salts of said acids; end-capped fatty acid amide alkoxylates; lower aliphatic alcohols and especially polyols, for example glycerol, ethylene glycol, propylene glycol or sorbitol; such as

Reducing agents and antioxidants such as sodium sulfite and reducing sugars. Other suitable stabilizers are known in the art.

Preference is given to using combinations of stabilizers, for example the combination of polyols, boric acid and / or borax, the combination of boric acid or borate, reducing salts and succinic acid or other dicarboxylic acids or the combination of boric acid or borate with polyols or polyamino compounds and with reducing salts.

According to the invention suitable as disinfectants and / or preservatives are, for example, antimicrobial active ingredients from the groups of alcohols,

Aldehydes, antimicrobial acids or their salts, carboxylic 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 agents

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, 2- 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-2,4,11,13-tetraazatetradecandiimidamide, antimicrobial quaternary surface active compounds, guanidines. Preferred antimicrobial surface-active quaternary compounds contain an ammonium,

Sulfonium, phosphonium, iodonium or arsonium group, as they are For example, KH Wallhäuser in "Practice of sterilization, disinfection - Conservation: germ identification - industrial hygiene" (5th edition - Stuttgart, New York: Thieme, 1995) describes. The terms disinfection, sanitation, antimicrobial action and antimicrobial active ingredient in the context of the invention have the usual meaning, for example, by KH Wallhaeuser in "Practice of sterilization, disinfection - Preservation: germ identification - industrial hygiene" (5th ed. - Stuttgart, New York: Thieme, 1995). During disinfection in the narrower sense of medical practice the killing of - theoretically all -

Infection germs means under sanitation is the widest possible

To understand the elimination of all, even saprophytic germs normally harmless to humans. The polyacrylic and polymethacrylic compounds include, for example, the high molecular weight homopolymers of acrylic acid crosslinked with a polyalkenyl polyether, in particular an allyl ether of sucrose, pentaerythritol or propylene (INCI name according to the International Dictionary of Cosmetic

Ingredients of The Cosmetic, Toiletry, and Fragrance Association (CTFA):

Carbomer), also referred to as carboxyvinyl polymers. Such polyacrylic acids are inter alia from the company. 3V Sigma under the trade name Polygel ^® , z. B. Polygel ^® DA, and from the Fa. BFGoodrich under the

Trade name Carbopol ^® available, for. Carbopol ^®> 940 (molecular weight approximately 4,000,000), Carbopol ^® 941 (molecular weight approximately 1,250,000) or Carbopol ^® 934 (molecular weight approximately 3,000,000). Furthermore, the following acrylic acid copolymers are included: (i) Copolymers of two or more monomers from the group of acrylic acid, methacrylic acid and their simple, preferably with C1-4-alkanols formed esters (INCI acrylates copolymer), which include about the copolymers of Methacrylic acid, butyl acrylate and methyl methacrylate (CAS designation according to Chemical Abstracts Service: 25035-69-2) or of butyl acrylate and

Methyl methacrylate (CAS 25852-37-3) and for example from Messrs. Rohm & Haas under the trade names Aculyn ^® and Acusol ^®, and from Degussa (Goldschmidt) under the trade name Tego ^® polymer available are, for. As the anionic non-associative polymers Aculyn 22, Aculyn 28, Aculyn ^® 33 (crosslinked), Acusol ^® 810, Acusol ^® 823 and Acusol ^® 830

(CAS 25852-37-3); (ii) crosslinked high molecular weight acrylic acid copolymers, such as those crosslinked with an allyl ether of sucrose or pentaerythritol copolymers of C10-30 alkyl acrylates with one or more monomers from the group of acrylic acid, methacrylic acid and their simple, preferably with C1-4 alkanols formed esters (INCI Acrylates / C 10-30 alkyl acrylates

Crosspolymer) and which are available, for example, from the company BFGoodrich under the trade name Carbopol ^® , z. B. hydrophobized Carbopol ^® ETD 2623 and Carbopol ^® 1382 (INCI Acrylates / C 0-30 alkyl acrylates

Gross polymer) and Carbopol ^® AQUA 30 (formerly Carbopol ^® EX 473).

Further thickeners are the polysaccharides and heteropolysaccharides, in particular the polysaccharide gums, for example gum arabic, agar, alginates, carrageenans and their salts, guar, guar gum, tragacanth, gellan, Ramzan, dextran or xanthan and their derivatives, eg. B. propoxylated guar, and their mixtures. Other polysaccharide thickeners, such as starches or cellulose derivatives, may alternatively, but preferably in addition to a polysaccharide gum be used, for example, starches of various origins and

Starch derivatives, e.g. As hydroxyethyl starch, starch phosphate esters or starch acetates, or carboxymethyl cellulose or its sodium salt, methyl, ethyl, hydroxyethyl, hydroxypropyl, hydroxypropylmethyl or hydroxyethylmethyl cellulose or cellulose acetate. A particularly preferred polysaccharide thickener is the microbial anionic heteropolysaccharide xanthan gum, which is produced by Xanthomonas campestris and some other species under aerobic conditions with a molecular weight of 2-15 x 106, and for example, by Fa. Kelco under the trade names Keltrol ^® and Kelzan ^® or is also available from Rhodia under the trade name Rhodopol ^®.

As thickeners, it is also possible to use phyllosilicates. These include, for example, those available under the trade name Laponite <(R)> Magnesium or sodium-magnesium sheet silicates from Solvay Alkali, in particular Laponite ^® RD or Laponite ^® RDS, as well as the

Magnesiumsilikate the company Süd-Chemie, especially the Optigel ^® SH. The amount of viscosity regulator is usually up to 0.5 wt .-%, preferably 0.001 to 0.3 wt .-%, in particular 0.01 to 0.2 wt .-%, particularly preferably 0.01 to 0.15 wt .-%. The viscosity of

Composition is preferably 0.4 to 400 nvPas. Furthermore, the composition may contain one or more corrosion inhibitors.

Suitable corrosion inhibitors (INCI Corrosion Inhibitors) are, for example, the following named according to INCI substances: cyclohexylamine, diammonium phosphates, dilithium oxalates, dimethylamino methyl propanol, dipotassium

Oxalates, Dipotassium Phosphates, Disodium Phosphates, Disodium Pyrophosphates, Disodium Tetrapropenyl Succinates, Hexoxyethyl Diethylammonium, Phosphates, Nitromethanes, Potassium Silicate, Sodium Aluminate, Sodium

Hexametaphosphates, Sodium Metasilicate, Sodium Molybdate, Sodium Nitrite, Sodium Oxalate, Sodium Silicate, Stearamidopropyl Dimethicone, Tetrapotassium Pyrophosphate, Tetrasodium Pyrophosphate, and Triisopropanolamine.

As perfumes, individual fragrance compounds, for. As the synthetic products of the ester, ether, aldehyde, ketone, alcohol and

Hydrocarbons are used. Fragrance compounds of the ester type are e.g. Benzyl acetate, phenoxyethyl isobutyrate,

p-tert-butylcyclohexyl acetate, linalyl acetate, dimethylbenzylcarbinyl acetate,

Phenylethyl acetate, linalyl benzoate, benzyl formate, ethylmethylphenyl glycinate, allyl cyclohexyl propionate, styrallyl propionate and benzyl salicylate. The ethers include, for example, benzyl ethyl ether to the aldehydes z. As the linear alkanals having 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, Hydroxycitronellal, Lilial and Bourgeonal, to the ketones z. The ionones, alpha-isomethylionone and methyl cedryl ketone, to the alcohols anethole, citronellol, Eugenol, geranion, linalol, phenylethyl alcohol and terpineol, the hydrocarbons mainly include the terpenes and balsams. Preferably, mixtures of different fragrances are used, which together produce an attractive fragrance.

As fragrances and natural fragrance mixtures can be used, as they are available from plant or animal sources, eg. Pine, citrus, jasmine, lily, rose, or ylang-ylang oil. Also essential oils of lower volatility, which are mostly used as aroma components, are suitable as perfume oils, eg. B. sage oil, chamomile oil, clove oil, lemon balm oil, mint oil,

Cinnamon leaf oil, Lindenbush oil, Juniper berry oil, Vetiver oil, Oliban oil, Galbanum oil and Ladanum oil.

The amount of perfumes in the compositions of the invention is generally from 0 to 2% by weight, based on the total weight of the finished compositions.

The dyes and pigments optionally present in the compositions according to the invention, both organic and inorganic dyes, can be selected from the corresponding positive list of the Cosmetics Ordinance or the EC List of cosmetic colorants. Pearlescent pigments, eg. As fish silver (guanine / hypoxanthine mixed crystals from fish scales) and mother of pearl (ground mussel shells), monocrystalline pearlescent pigments such. B. Bismuthoxychlorid (BiOCl), layer substrate pigments, z. Mica / metal oxide, silver-white pearlescent pigments of TiO 2, interference pigments (ΤΊΟ 2, different layer thickness),

Color luster pigments (Fe2O3) and combination pigments (TiO2 / Fe2O3,

TiO2 / Cr2O3, TiO2 / Berlin Blue, TiO2 / Carmine). The amount of dyes and pigments in the invention

Compositions are generally from 0.01 to 1.0% by weight, based on the total weight of the finished compositions. The composition according to the invention preferably contains one or more additives as component G.

The proportion of the component G in the total composition, if it is different from 0%, is generally from 0.01 to 10% by weight, preferably from 0.1 to 1% by weight, particularly preferably from 0.1 to 0, 5% by weight.

Component H The proportion of water in the total composition is

Generally 30.00 to 99.89 wt .-%, preferably 40.00 to 55 wt .-%, particularly preferably 40 to 90 wt .-%.

The invention relates to a composition for cleaning hard surfaces, comprising a) one or more N-methyl-N-acylglucamines of the formula (I),

in which R is a linear or branched, saturated or unsaturated C5-C21-alkyl radical, wherein the proportion of glucamines with C7-C13

Alkyl radicals R more than 80 wt .-% and the proportion of glucamines with C7-C9 alkyl radicals R more than 50-wt .-%, each based on the total amount of glucamins, as component A, b) one or more inorganic or organic acids as

Component B,

c) optionally one or more anionic surfactants as component C, d) optionally one or more other surfactants other than components A and C as component D,

e) optionally one or more complexing agents as component E, f) optionally one or more solvents other than water as component F,

g) optionally one or more further additives, such as viscosity regulators, enzymes, bleaching agents, preservatives, fragrances and dyes, as component G and

h) water as component H, wherein the composition has a pH of less than 6.

In general, the compositions according to the invention (in each case based on the total composition) comprise: a) 0.01 to 10.00% by weight, preferably 0.10 to 5.00% by weight, especially

preferably from 1.00 to 3.00% by weight of component (A),

b) 0.10 to 10.00 wt .-%, preferably 0.20 to 5.00 wt .-%, especially

preferably from 1.00 to 3.00% by weight of component (B),

c) 0 or 0.10 to 10 wt .-%, preferably 0.10 to 3.00 wt .-%, particularly preferably 0.5 to 1, 50 wt .-% of component (C),

d) 0 or 0.10 to 10.00% by weight, preferably 0 or 0.10 to 3.00% by weight, particularly preferably 0% by weight of component (D),

e) 0 or 0.10 to 10.00 wt .-%, preferably 0 or 0, 0 to 3.00 wt .-%, particularly preferably 0 or 0.10 to 1, 00 wt .-% of the component (E ), f) 0 or 0.10 to 10.00 wt .-%, preferably 0 or 0.10 to 3.00 wt .-%, particularly preferably 0 or 0.10 to 1, 50 wt .-% of the component (F), g) 0 or 0.01 to 0.00 wt .-%, preferably 0 or 0.10 to 1, 00 wt .-%, particularly preferably 0 or 0.10 to 0.05 wt .-% the component (G) and h) 30.00 to 99.89 wt .-%, preferably 40.00 to 95.00 wt .-%, particularly preferably 40.00 to 90.00 wt .-% of the component (H ). The composition of the invention is particularly suitable as

Cleaning and / or descaling agents, for example for kitchens, bathrooms, toilets, but also swimming pools, saunas, commercial kitchens or slaughterhouses. The invention likewise relates to a method for cleaning a hard surface, wherein the surface is brought into contact with a composition according to the invention. The contacting generally involves application of the composition to the surface and subsequent mechanical treatment and / or removal of the soil by means of a cloth, sponge, etc. or by rinsing with water.

The composition can be applied in the form of a foam to the surface to be cleaned. For this purpose, in a special way, a manually activated spray dispenser, in particular selected from the group comprising aerosol spray dispenser, even pressure-building spray dispenser,

Pump spray dispenser and trigger spray dispenser, in particular pump spray dispenser and trigger spray dispenser with a container made of polyethylene, polypropylene or polyethylene terephthalate. The spray head is preferably equipped with a foam nozzle. In addition to trigger bottles, pump foam dispensers are also suitable. In addition, the agent can also with the addition of a suitable propellant

(For example, n-butane, a propane / butane mixture, carbon dioxide, nitrogen or a CO2 / N2 mixture) are filled into a corresponding aerosol spray bottle.

The invention is illustrated by the following examples without thereby limiting them:

Examples:

The N-acyl-N-methylglucamines described below were after

EP 0 550 637 from the corresponding fatty acid methyl esters and

N-methylglucamine prepared in the presence of 1, 2-propylene glycol as a solvent and as a solid consisting of active substance and 1, 2-PropylenglykoI obtained (all data in wt .-%). Mixtures of N-acyl-N- Methylglucaminen obtained with acyl radicals of the specified carbon numbers (C8 / C10 or C12 / C14).

Table 1: N-Acyl-N-methylglucamines used

Table 2: Formulation examples for bathroom cleaners (amounts in parts by weight of active substance)

Example 1 2 3 4 5 6 7

Ingredient Comparison Invention

APG (C8-14)

2,3 - - - - - - (Glucopon 215 UP)

C9 / 1 1 Pareth-7

- 2,3 - - - - - (Genapol XS 070)

GA 1 - - - - 2,3 1, 5 1, 2

GA 2 - - 2,3 - - 0,8 1, 1

GA 3 - - - 2,3 - - - Sodium Laureth

Sulfate (2EO) = 1, 0 1, 0 1, 0 1, 0 1, 0 1, 0 1, 0

Genapol LRO

Citric acid 3.0 3.0 3.0 3.0 3.0 3.0 3.0

Sodium citrate 2.0 2.0 2.0 2.0 2.0 2.0 2.0

Appearance clear clear clear cloudy clear clear clear pH ³ · ⁷ 3,7 3,7 3,7 3,7 3,7 3,7

Viscosity (mPas) 1 1 1 - 1 480 680

Due to the turbidity example 4 (comparison) with the long-chain

N-acylglucamine can not be used. Application results:

A. lime soap removability

Kalkseifenfernfernbarkeit was according to the quality recommendations of the

Industrieverbandes Körperpflege- und Waschmittel e.V. (IKW), Department of Cleaning and Care Products, Frankfurt am Main (version 2002), published in the SÖFW-Journal, 129th year 3-2003, pp. 62-70.

Methods Description:

For the test, high-gloss, white tiles (15 x 15 cm, (Villeroy & Boch), first cleaned with a mild abrasive cleaner, rinsed with water and rubbed with ethanol, then dried for 1 h at 180 ° C in a preheated oven and then balanced

Test soil is a Ca stearate suspension of the following composition:

85.0% ethanol, 96 MEK denatured

5.0% calcium stearate, fine 9.8% water, demin.

0.2% carbon black / special black 4

Ethanol is introduced and Ca stearate stirred. Thereafter, the addition of water and carbon black. After complete mixing, the dirt on the

Tiles sprayed on and dried. After a defined drying time, an aliquot of the undiluted cleaner is dropped onto the tile. The exposure time is 2.5, 5, 7.5, 10 to a maximum of 30 minutes. The tile is then rinsed under running water, dried and evaluated.

The time is determined in which the cleaners to be examined a

cleaning performance

from 90 - 100%. The evaluation is done visually. There is a five-fold determination per sample and time.

Table 3: Kalkseifenfernfernbarkeit

The table shows that Examples 5 to 7 according to the invention

Comparative Examples 1 to 3 are clearly superior in lime soap removability. If only one C-12 / C-14 chain (example 3) is selected, the performance is not sufficient. B. Material compatibility: Stress corrosion cracking test on plastic rods in accordance with DIN 53449 T 1-3 In the holes provided with a bore (drill 2.7 and reamer 2.9 H7)

Test stick is a stainless steel pin (cylinder pin DIN 6325 Toi .: m6 3x10) by means of a device, eg. B. rack press type 5, pressed. Make sure that the pin is inserted vertically. The test bars are immersed briefly in the test medium. Adhesive test medium is not removed. Dive again after 24 hours. After every 24 h, the dipping process is repeated on 5 consecutive days. The occurrence of stress cracks is after defined periods (4 hours, 1 day, then every 24 hours.

evaluate and document in tabular form. End of the test is after 14 days. The following plastics are tested:

ABS (acrylonitrile butadiene styrene copolymer) Novodur ^® P2MC

PC (Polycarbonate) Makroion ^® 3103 FBL 55/115

PMMA (polymethylmethacrylate) Plexiglas ^® 8N

POM1 (polyoxymethylene) Hostaform ^® 13031 XAS

POM2 (polyoxymethylene) Hostaform C 9021 ^® GV 1/30

In the evaluation means: 1 = unchanged

2 = crack initiation / small crack

3 = crack continuously

4 = breakage material compatibility

The table shows that Examples 5, 6 and 7 according to the invention are compatible with all materials and are therefore clearly superior to Comparative Example 2. Comparative Examples 1 and 3 are similar in compatibility (but not in cleaning performance).

C. Overall rating

The inventive compositions of Examples 5 and 6 using the N-methyl-N-acylglucamines of the present invention show superior soil removal over Comparative Examples 1, 2 and 3. In addition, the cleaners have improved over Example 2

Material compatibility and have a significantly higher proportion

renewable resources. The use according to the invention of the specific N-methyl-N-acylglucamines makes it possible to formulate compositions according to the invention which exhibit increased dirt removal without disadvantages in terms of compatibility and sustainability, and at mild pH values.

Claims

Patent claims

1. Use of N-methyl-N-acylglucamines in compositions for cleaning hard surfaces, with a pH <6, whereby the proportion of glucamines with C8-C14 acyl groups is at least 80% by weight and the proportion of glucamines with C8 -C 0 acyl groups are more than 50% by weight, based on the total amount of glucamines.

2. Use according to claim 1, wherein the proportion of N-methyl-N-acylglucamines with C8-C10 acyl groups is more than 80% by weight, based on the total amount of N-methyl-N-acylglucamines.

3. Use according to claim 1 or 2, wherein the pH value of

Composition is 2 to 6.

4. Use according to claim 3, wherein the pH of the composition is 3 to 5.

5. Composition for cleaning hard surfaces, containing one or more N-methyl-N-acylglucamines of the formula (I),

in which R represents a linear or branched, saturated or unsaturated C5-C21 alkyl radical, the proportion of glucamines being C7-C3

alkyl radicals R more than 80% by weight and the proportion of glucamines with C7-C9 alkyl radicals R more than 50% by weight, in each case based on the total amount of glucamines, is, as component A, b) one or more inorganic or organic acids as

component B,

c) optionally one or more anionic surfactants as component C, d) optionally one or more further surfactants different from components A and C as component D,

Component G and

h) water as component H,

wherein the composition has a pH of less than 6.

6. Composition according to claim 5, wherein the proportion of N-methyl-N-acyl-glucamines with C8-C10 acyl groups is more than 80% by weight, based on the

Total amount of N-methyl-N-acylglucamines is.

7. Composition according to claim 5 or 6, containing

(a) 0.01 to 10.00% by weight of component (A),

(b) 0.10 to 10.00% by weight of component (B),

(c) 0 or 0.10 to 10.00% by weight of component (C),

(d) 0 or 0.10 to 10.00% by weight of component (D),

(e) 0 or 0.10 to 10.00% by weight of component (E),

(f) 0 or 0.10 to 10.00% by weight of component (F),

(g) 0 or 0.01 to 10.00% by weight of component (G) and

(h) 30.00 to 99.89% by weight of component (H).

8. Composition according to one of claims 5 to 7, wherein the proportion of component A is 0.10 to 5.00% by weight.

9. Composition according to claim 8, wherein the proportion of component A is 1.00 to 3.00% by weight.

10. Composition according to one of claims 5 to 9, containing an inorganic acid as component B

11. Composition according to one of claims 5 to 9, containing an organic acid as component B

12. Composition according to claim 11, containing as component B an organic acid selected from the group consisting of lactic acid, citric acid, acetic acid, formic acid and mixtures of two or more of these acids.

13. Composition according to one of claims 5 to 7, containing an anionic surfactant.

14. Composition according to one of claims 5 to 7, wherein the pH of the composition is 2 - 6, preferably 3 - 5, particularly preferably 3 - 4.

15. A method for cleaning a hard surface, wherein the surface is brought into contact with a composition according to the invention according to any one of claims 5 to 14.