EP2494017B1 - Low-residue detergent for hard surfaces - Google Patents

Description

The subject of this application is a hard surface cleaner, especially glass, which contains at least one glycolipid biosurfactant and at least one solvent.

When cleaning hard surfaces, it is always desirable that the cleaning agent is in turn completely removed after successful removal of the soiling and dries residue-free if possible. In particular, on glass surfaces, dark tiles or glass ceramic cooktops otherwise remain unsightly streaks and streaks, which can only be removed by increased workload.

Therefore, in the formulation of the detergent as far as possible resorted to ingredients that are known to leave little residue and dry streak-free. For example, according to US 7314852 B1 Ethylene glycol be used in combination with N-alkylpyrrolidones as a solvent, according to US 5849681 For example, organic ethers, such as ethylene glycol n-hexyl ether, can be used in combination with alcohols having a minimal tendency to form streaks, so-called anti-stripe alcohols, such as propylene glycol, glycerol or hexanol as the solvent.

In addition to the solvent used, the choice of the surfactant used is crucial for the absence of stripes and the low residue of a cleaning agent. For example, surfactants which tend to form crystalline or liquid-crystalline phases, such as long-chain alkyl sulfates, are less suitable than those leaving amorphous residues, for example, alkyl polyglycosides, since amorphous residues can be better mechanically polished with the aid of wipes. The use of low-salt surfactants makes sense, as the salt load can increase the formation of residues. On the other hand, however, the surfactants are also needed to effect good wetting, cleaning and foaming. Frequently, mixtures of two or more surfactant types are therefore hitherto used, but they can not satisfactorily solve the problem of residue formation.

The increased use of renewable raw materials is another goal in the formulation of new detergent compositions. This is desirable both in view of the expected shortage of crude oil and because of the desire for sustainability and a neutral or positive CO ₂ balance and is increasingly in demand from the consumer. Another aspect is the biodegradability, which is often not completely given with surfactants from non-native sources, which leads to a stronger water pollution.

It was therefore necessary to identify a surfactant which has a particular low residue when cleaning hard surfaces and is thereby obtained from natural sources.

Surprisingly, it has now been found that glycolipids of microbial origin, for example sophorolipids, rhamnolipids, glucoselipids, cellobioselipids or trehaloselipids, effect a particularly good wetting and freedom from streaks and low residue formation when cleaning hard surfaces. This applies in particular in combination with solvents, for example with alkylene glycol ethers or so-called anti-stripe alcohols (alcohols with minimal tendency to form stripes).

The subject of this invention is therefore a hard surface cleaner, especially glass, containing at least one glycolipid biosurfactant and at least one solvent, wherein the at least one solvent comprises ethylene glycol n-hexyl ether.

In the context of the present invention are fatty acids or fatty alcohols or their derivatives - unless otherwise stated - representative of branched or unbranched carboxylic acids or alcohols or their derivatives having preferably 6 to 22 carbon atoms. The former are particularly preferred because of their vegetable base as based on renewable raw materials for ecological reasons.
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.

Substances which also serve as ingredients of cosmetic products are hereinafter referred to as appropriate according to the International Nomenclature Cosmetic Ingredient (INCI) nomenclature. Chemical compounds carry an INCI name in English, plant ingredients are listed only after Linnaeus in Latin. So-called trivial names such as "water", "honey" or "sea salt" are also given in Latin. The INCI names are the " International Cosmetic Ingredient Dictionary and Handbook, Seventh Edition (1997 issued by The Cosmetic, Toiletry and Fragrance Association (CTFA), 1101, 17 ^th Street NW, Suite 300, Washington, DC, 20036, USA, and more than 9,000 INCI names and references to more than 37,000 Includes trade names and technical names including associated distributors from over 31 countries The International Cosmetic Ingredient Dictionary and Handbook assigns one or more chemical classes to the ingredients, such as "Polymeric Ethers", and one or more functions, for example "Surfactants - Cleansing Agents", to which it will be further explained, and where appropriate also referred to below.

The indication CAS means that the following sequence of numbers is a name of the Chemical Abstracts Service.

Unless otherwise stated, amounts given are percentages by weight (% by weight) of the total composition. These percentages refer to active contents.

glycolipids

Glycolipids in the narrower sense are compounds in which one or more monosaccharide units are glycosidically linked to a lipid moiety. They belong to the biosurfactants, which are surfactants of microbial origin, which can be produced on the basis of vegetable oil or sugar substrates. For example, sophorolipids are produced by fermentation using yeasts such as Candida bombicola (also known as Torulopsis bombicola ), Yarrowia lipolytica, Candida apicola ( Torulopsis apicola ) and Candida bogoriensis , growing them on sugars, hydrocarbons, vegetable oils or mixtures thereof. The sophorolipid available from Soliance under the trade name Sopholiance S is obtained, for example, by fermentation of Candida bombicola on rapeseed oil methyl ester and glucose. On the other hand, rhamnolipids are obtained from bacteria of the genus Pseudomonas, in particular from Pseudomonas aeruginosa, preferably when grown on hydrophobic substrates such as n-alkanes or vegetable oils. Other glycolipids, such as glucoselipids, cellobioselipids or trehaloselipids, are produced by other microorganisms on different substrates.
The agent according to the invention preferably contains a glycolipid biosurfactant selected from the group comprising sophorolipids, rhamnolipids, glucoselipids, cellobioselipids, trehaloselipids and mixtures thereof, particularly preferably sophorolipids, and / or rhamnolipids. A preferred sophorolipid is Sopholiance S (ex Soliance). Glycolipids are preferably used in amounts of 0.0002 to 8 wt .-%, preferably 0.01 to 5 wt .-%, particularly preferably 0.02 to 1 wt .-%.

solvent

The composition of the invention further contains at least one solvent, wherein the solvent comprises ethylene glycol n-hexyl ether.

In addition to the aforementioned, the inventive composition may contain further water-miscible solvents, preferably selected from the group comprising methanol, ethanol, propanol, isopropanol, ethylene glycol, butyl glycol, ethylene glycol propyl ether and mixtures thereof. Most preferred are ethanol and isopropanol.

The composition according to the invention preferably contains solvents in amounts of up to 10% by weight, more preferably 0.1 to 8% by weight.

In addition to the glycolipids, the agent according to the invention may contain other surfactants, in particular from the classes of anionic and nonionic surfactants.

Suitable anionic surfactants are preferably C ₈ -C ₁₈ -alkylbenzenesulfonates, in particular having about 12 C atoms in the alkyl moiety, C ₈ -C ₂₀ -alkanesulfonates, C ₈ -C ₁₈ -monoalkyl sulfates (fatty alcohol sulfates), C ₈ -C ₁₈ -alkyl polyglycol ether sulfates with 2 to 6 ethylene oxide units (EO) in the ether portion and sulfosuccinic mono- and di-C ₈ -C ₁₈ alkyl esters. Furthermore, C ₈ -C ₁₈ -α-olefinsulfonates, sulfonated C ₈ -C ₁₈ -fatty acids, in particular dodecylbenzenesulfonate, C ₈ -C ₂₂ -Carbonsäureamidethersulfate, C ₈ -C ₁₈ -Alkylpolyglykolethercarboxylate, C ₈ -C ₁₈ -N-Acyltauride , N-Acylaminosäurederivate as N-acyl aspartates or N-acyl glutamates, C ₈ -C ₁₈ -N sarcosinates and C ₈ -C ₁₈ -Alkylisethionate or mixtures thereof.

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

Examples of such surfactants are sodium cocoalkyl sulfate, sodium sec-alkanesulfonate having about 15 carbon atoms and sodium dioctylsulfosuccinate. Sodium fatty alkyl sulfates and fatty alkyl + 2EO ether sulfates having 12 to 14 C atoms have proven to be particularly suitable.

C ₈ -C ₁₈ -alcohol polyglycol ethers, ie ethoxylated and / or propoxylated alcohols having 8 to 18 C atoms in the alkyl moiety and 2 to 15 ethylene oxide (EO) and / or propylene oxide units (PO), C ₈ - are especially nonionic surfactants. C ₁₈ -carboxylic acid polyglycol esters having 2 to 15 EO, for example tallow fatty acid + 6-EO esters, ethoxylated fatty acid amides having 12 to 18 C atoms in the fatty acid part and 2 to 8 EO, long-chain amine oxides having 14 to 20 C atoms and long-chain alkylpolyglycosides to mention with 8 to 14 carbon atoms in the alkyl moiety and 1 to 3 glycoside units. Examples of such surfactants are oleyl-cetyl-alcohol with 5 EO, nonylphenol with 10 EO, lauric acid diethanolamide, Kokosalkyldimethylaminoxid and Kokosalkylpolyglucosid with an average of 1.4 glucose units. Particular preference is given to using fatty alcohol polyglycol ethers having in particular 2 to 8 EO, for example C _12-14 -fatty alcohol + 4-EO ether, amine oxides and C _8-10 -alkylpolyglucosides having 1 to 2 glycoside units.

In addition to the previously mentioned types of surfactant, the agent according to the invention may also contain cationic surfactants and / or amphoteric surfactants.

Suitable amphoteric surfactants are, for example, betaines of the formula (R ⁱⁱⁱ ) (R ^iv ) (R ^v ) N ⁺ CH ₂ COO ^- , in which R ^{iii is} an alkyl radical optionally interrupted by hetero atoms or heteroatom groups having 8 to 25, preferably 10 to 21 carbon atoms and R ^iv and R ^{v are} identical or different alkyl radicals having 1 to 3 carbon atoms, in particular C ₁₀ -C ₁₈ -alkyl-dimethylcarboxymethylbetain and C ₁₁ -C ₁₇ -alkylamidopropyl-dimethylcarboxymethylbetain.

Suitable cationic surfactants include the quaternary ammonium compounds of the formula (R ^vi ) (R ^vii ) (R ^viii ) (R ^ix ) N ⁺ X ^- , in which R ^vi to R ^{ix are} four identical or different, in particular two long and two short-chain, alkyl radicals and X ^{- are} an anion, in particular a halide ion, for example, didecyl-dimethyl-ammonium chloride, alkyl-benzyl-didecyl-ammonium chloride and mixtures thereof.

The composition of the invention contains further surfactants, preferably in amounts of up to 5 wt .-%, preferably 0.01 to 2 wt .-%.

pH adjusters

The pH of the composition according to the invention can be adjusted by means of customary pH regulators, a range from 5.5 to 8.5, preferably 6 to 8, in particular 7.0, being preferred. 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, however, it is also possible to use the mineral acids hydrochloric acid, sulfuric acid and nitric acid or mixtures thereof. Preferred 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 particularly preferred. In addition, the agent according to the invention may contain volatile alkali. As such, ammonia and / or alkanolamines, which may contain up to 9 C atoms in the molecule, are used. As alkanolamines, the ethanolamines are preferred and of these in turn the monoethanolamine.

antibacterial agents

Disinfection and sanitation constitute a particular form of purification. In a corresponding particular embodiment of the invention, the cleaning agent therefore contains one or more antimicrobial agents, preferably in an amount of 0.01 to 1% by weight, preferably 0.02 to 0.8 wt .-%, in particular 0.05 to 0.5 wt .-%, particularly preferably 0.1 to 0.3 wt .-%, most preferably 0.2 wt .-%.

The terms disinfection, sanitation, antimicrobial action and antimicrobial agent have the usual meaning in the context of the teaching of the invention, for example by KH Wallhäußer in "Practice of Sterilization, Disinfection, Preservation, Germination Identification, Plant Hygiene" (5th edition - Stuttgart, New York: Thieme, 1995 ) is reproduced. While disinfection in the narrower sense of the medical practice means the killing of - in theory all - infectious germs, sanitation is to be understood as the greatest possible elimination of all - including the saprophytic - normally harmless to humans saprophytic - germs. Here, the extent of disinfection or sanitation depends on the antimicrobial effect of the applied agent, which decreases with decreasing content of antimicrobial agent or increasing dilution of the agent for use.
For example, antimicrobial agents 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 are suitable according to the invention 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, 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 for example KH Wallhäußer in "Practice of Sterilization, Disinfection, Preservation, Germ Identification, Occupational Hygiene" (5th edition - Stuttgart, New York: Thieme, 1995 ) describes. Furthermore, antimicrobially effective essential oils can be used, which at the same time provide for a scenting of the cleaning agent. However, particularly preferred antimicrobial agents are selected from the group comprising salicylic acid, quaternary surfactants, in particular benzalkonium chloride, peroxo compounds, in particular hydrogen peroxide, alkali metal hypochlorite and mixtures thereof

preservatives

Preservatives may also be included in compositions of the invention. As such, essentially the substances mentioned in the antimicrobial agents can be used.

Solubility reducer

In addition to the substances already mentioned, the compositions according to the invention can also contain solubilizers, so-called hydrotropes. In this case, it is possible to use all substances conventionally used for this purpose in cleaning compositions, preferably sodium cumene sulphonate or sodium xylene sulphonate.

complexing

INCI chelating agents, also called sequestrants, are ingredients that are capable of complexing and inactivating metal ions to prevent their detrimental effects on the stability or appearance of the agents, such as clouding. 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.

Suitable examples are the following according to INCI called complexing agents: aminotrimethylene, phosphonic acid, beta-alanines diacetic acid, calcium disodium EDTA, citric acid, cyclodextrin, cyclohexanediamines tetraacetic acid, diammonium citrates, diammonium EDTA, diethylenetriamines pentamethylene phosphonic acid, dipotassium EDTA, disodium azacycloheptanes diphosphonates , 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 Polyphosphate, Potassium Trisphosphonomethylamine Oxides, Ribonic Acid, Sodium Chitosan Methylene Phosphonate, Sodium Citrate, Sodium Diethylenetriamine Pentamethylene Phosphonate, S orodium dihydroxyethylglycinate, sodium EDTMP, sodium glucate- rate, sodium gluconate, sodium glycereth-1 polyphosphate, sodium hexametaphosphate, sodium metaphosphate, sodium metasilicate, sodium phytate, sodium polydimethylglycinophenolsulfonate, sodium trimetaphosphate, TEA-EDTA, TEA polyphosphate, tetrahydroxyethyl ethylene diamine, tetrahydroxypropyl ethylene diamine, tetrapotassium Etidronates, tetrapotassium pyrophosphates, tetrasodium EDTA, tetrasodium etidronates, tetrasodium pyrophosphates, tripotassium EDTA, trisodium dicarboxymethyl alaninates, trisodium EDTA, trisodium HEDTA, trisodium NTA and trisodium phosphates.

enzymes

The agent may also contain enzymes, preferably proteases, lipases, amylases, hydrolases and / or cellulases. They can be added to the composition according to the invention 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, further active ingredients, for example stabilizers, emulsifiers, pigments, bleaches or dyes, may additionally be applied. Such capsules are applied by methods known per se, for example by shaking or rolling granulation or 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.
In addition, enzyme stabilizers may be present in enzyme-containing agents in order to protect an enzyme contained in an agent according to the invention from damage such as, for example, inactivation, denaturation or decomposition, for example 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 mixtures thereof, aliphatic carboxylic acids up to C ₁₂ , 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; and 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.

viscosity

The agent according to the invention preferably has a viscosity of 0.4 to 400 mPa · s. For this purpose, the agent may contain viscosity regulators. 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 .-%, most preferably 0.05 to 0.15 wt .-%.

Suitable viscosity regulators are, for example, organic natural thickeners (agar-agar, carrageenan, xanthan, tragacanth, gum arabic, alginates, pectins, polyoses, guar flour, locust bean gum, starch, dextrins, gelatin, casein), organic modified natural products (carboxymethylcellulose and other cellulose ethers, hydroxyethyl - and -propylcellulose and the like, core flour ethers), organic fully synthetic thickeners (polyacrylic and polymethacrylic compounds, vinyl polymers, polycarboxylic acids, polyethers, polyimines, polyamides) and inorganic thickeners (polysilicic acids, phyllosilicates, clay minerals such as montmorillonites, zeolites, silicas).

Dyes and perfumes

Finally, the composition according to the invention may comprise all scents and dyes customary in detergents and cleaners.

For application, the agent according to the invention should be applied in the form of a foam to the surface to be cleaned. Particularly suitable for this purpose is a manually activated spray dispenser, in particular selected from the group comprising aerosol spray dispensers, pressure-building spray dispensers, pump spray dispensers and trigger spray dispensers, in particular pump spray dispensers and trigger spray dispensers with a container made of polyethylene, polypropylene or polyethylene terephthalate. Such trigger bottles are offered for example by the company Afa-Polytec. The spray head is preferably equipped with a foam nozzle. In addition to trigger bottles, pump foam dispensers, such as those offered by the company Airspray or the Daiwa Can Company, are also suitable. In addition, the agent can also be filled with the addition of a suitable propellant (eg n-butane, a propane / butane mixture, carbon dioxide, nitrogen or a CO ₂ / N ₂ mixture) in a corresponding aerosol spray bottle. However, such a spray dispenser is less preferred.

A further subject of the invention is accordingly a product of an aqueous cleaning agent according to the invention and a spray dispenser, in particular of an inventive aqueous cleaning agent and a trigger bottle with foam nozzle or a pump foam dispenser.

The agents according to the invention are preferably used for cleaning hard surfaces. Hard surfaces in the sense of this application are windows, mirrors and more Glass surfaces, surfaces of ceramic, plastic, stone, metal or even wood and lacquered wood, which are found in household and commercial, such as bathroom ceramics, kitchen surfaces or floors. Above all with glossy surfaces and glass, a residue-free removal of the cleaning agent with simultaneously good cleaning performance is highly desirable. A third subject of the invention is therefore the use of an aqueous cleaning agent according to the invention or of a product according to the invention for cleaning hard surfaces, in particular glass.

For cleaning hard surfaces with the agent according to the invention, the following method has proven itself, which accordingly represents the fourth subject of the invention: The inventive aqueous cleaning agent is applied with a spray dispenser (trigger bottle) with foam nozzle or a pump foam dispenser on the surface to be cleaned and the foam, optionally After a contact time of up to 5 minutes, rub with a sponge, cloth, leather or another utensil usually used for cleaning purposes on the surface. The foam decomposes and is taken up together with the dissolved dirt, so that no appreciable residue remains on the cleaned surface. If a residue nevertheless remains, this forms an amorphous film which can be mechanically polished with the aid of a cleaning cloth.

embodiments

Inventive detergent formulations E1, E3 and E4 and comparative formulations V1 to V4 were prepared and compared with respect to their wetting behavior, the residue behavior and the banding. The compositions are shown in the following two tables. The quantities are in wt .-%, based on the active ingredient.
E2 and E4 did not fall under the claims.

• Sophorolipid - Sopholiance S, Group Soliance
• Decylglycosid - APG 220 UPW, Cognis
• Na-C_12-14-Fettalkoholsulfat - Texapon LS 35, Cognis
• Na-C_12-14-Fettalkoholethersulfat 2 EO - Texapon N70, Cognis
• Lauryldimethylaminoxid - Genaminox LA, Clariant
• Dipropylene Glycol n-Propyl Ether - Dowanol DPnP, Dow
• Dipropylenglykol-n-butylether - Dowanol DPnB, Dow
• Ethylenglycol-n-hexylether - n-Hexyl Cellosolve, Dow

E1 E2 E3 E4 Sophorolipid 0,1 0,1 0,1 0,1 Na-C_12-14-Fettalkoholsulfat -- 0,1 -- -- Na-C_12-14-Fettalkoholethersulfat 2 EO -- -- 0,1 -- Lauryldimethylaminoxid -- -- -- 0,1 Ethanol 3 1 3 2 Isopropanol -- 3 -- -- Dipropylenglykol-n-propylether oder Dipropylenglykol-n-butylether - 2 -- 2 Ethylenglykol-n-hexylether 3 -- 3 1 Parfüm 0,01 0,01 0,01 0,01 Farbstoff 0,0001 0,0001 0,0001 0,0001 Wasser Ad 100 Ad 100 Ad 100 Ad 100 pH 7,0 7,0 7,0 7,0 V1 V2 V3 V4 Decylglycosid 0,1 0,1 -- 0,1 Na-C_12-14-Fettalkoholsulfat 0,1 -- 0,1 0,1 Na-C_12-14-Fettalkoholethersulfat 2 EO -- 0,1 0,1 -- Lauryldimethylaminoxid -- -- -- 0,1 Citronensäuremonohydrat -- -- 0,003 0,003 Ethanol 3 3 3 3 Isopropanol -- 1 -- -- Dipropylenglykol-n-propylether oder Dipropylenglykol-n-butylether -- 2 -- 2 Ethylenglykol-n-hexylether 2 -- 2 -- Natronlauge -- -- Auf pH 9 Auf pH 9 Natriumcarbonat -- -- 0,002 0,002 Parfüm 0,01 0,01 0,01 0,01 Farbstoff 0,0001 0,0001 0,0001 0,0001 Wasser Ad 100 Ad 100 Ad 100 Ad 100 pH 7,0 7,0 9,0 9,0 The following trading products were used for the raw materials listed in the tables:

• Sophorolipid - Sopholiance S, Group Soliance
• Decyl glycoside - APG 220 UPW, Cognis
• Na-C _12-14 fatty alcohol sulfate - Texapon LS 35, Cognis
• Na C _12-14 fatty alcohol ether sulfate 2 EO - Texapon N70, Cognis
• Lauryldimethylamine oxide - Genaminox LA, Clariant
• Dipropylene Glycol n-Propyl Ether - Dowanol DPnP, Dow
• Dipropylene glycol n-butyl ether - Dowanol DPnB, Dow
• Ethylene glycol n-hexyl ether - n-hexyl Cellosolve, Dow

E1 E2 E3 E4 sophorolipid 0.1 0.1 0.1 0.1 Na-C _12-14 fatty alcohol sulfate - 0.1 - - Na-C _12-14 fatty alcohol ether sulfate 2 EO - - 0.1 - lauryl dimethyl - - - 0.1 ethanol 3 1 3 2 isopropanol - 3 - - Dipropylene glycol n-propyl ether or dipropylene glycol n-butyl ether - 2 - 2 Ethylene glycol n-hexyl ether 3 - 3 1 Perfume 0.01 0.01 0.01 0.01 dye 0.0001 0.0001 0.0001 0.0001 water Ad 100 Ad 100 Ad 100 Ad 100 pH 7.0 7.0 7.0 7.0 V1 V2 V3 V4 decyl 0.1 0.1 - 0.1 Na-C _12-14 fatty alcohol sulfate 0.1 - 0.1 0.1 Na-C _12-14 fatty alcohol ether sulfate 2 EO - 0.1 0.1 - lauryl dimethyl - - - 0.1 citric acid monohydrate - - 0,003 0,003 ethanol 3 3 3 3 isopropanol - 1 - - Dipropylene glycol n-propyl ether or dipropylene glycol n-butyl ether - 2 - 2 Ethylene glycol n-hexyl ether 2 - 2 - caustic soda - - At pH 9 At pH 9 sodium - - 0,002 0,002 Perfume 0.01 0.01 0.01 0.01 dye 0.0001 0.0001 0.0001 0.0001 water Ad 100 Ad 100 Ad 100 Ad 100 pH 7.0 7.0 9.0 9.0

The wetting was tested by determining the contact angle using a Krüss DAS contact angle tensiometer. The residue behavior was determined by evaporating 2 ml of the respective solution on a watch glass. To assess the banding, 2 ml of the respective cleaning solution was applied to a pre-cleaned mirror surface, spread with a lint-free tissue cloth (20 × 20 cm) by wiping and allowed to dry. The evaluation of both the residue behavior and the banding was done visually compared to tap water 16 ° dH as standard, with grades from 1 (very good) to 6 (inadequate) were awarded and the standard was rated with a grade of 5. In order to test all three parameters, five tests each were made and the mean value was formed in each case. The results are shown in the following table: E1 E2 E3 E4 V1 V2 V3 V4 Net angle [°] 16 13 14 11 12 11 13 14 residue behavior 1.8 2.2 1.9 2.3 2.8 2.9 3.3 3.5 banding 2.5 2.6 2.6 2.6 3.2 3.0 3.9 3.5

It turns out that all formulations had equally low contact angles. However, both the residue behavior and the streaking were significantly worse in the comparative formulations, while the formulations of the invention showed consistently good residue behavior and low streaking.

Claims (7)

1. Cleaning agent for hard surfaces, in particular glass, characterized in that the cleaning agent contains at least one glycolipid biosurfactant and at least one solvent, the at least one solvent comprising ethylene glycol n-hexyl ether.
2. Cleaning agent according to Claim 1, characterized in that the glycolipid biosurfactant is preferably selected from the group including sophorolipids, rhamnolipids, glucose lipids, cellobiose lipids, trehalose lipids, and mixtures thereof.
3. Cleaning agent according to one of Claims 1 and 2, characterized in that the cleaning agent contains additional ingredients, auxiliary substances, and additives customary in cleaning agents for hard surfaces, preferably selected from the group including further solvents, further surfactants, pH adjusters (bases, acids), antibacterial active substances, preservatives, solubility promoters, complexing agents, enzymes, viscosity regulators, dyes, fragrances, and mixtures thereof.
4. Cleaning agent according to one of Claims 1 through 3, characterized in that the cleaning agent has a pH of 5.5 to 8.5, preferably 6 to 8, in particular 7.0.
5. Product on the basis of a cleaning agent according to one of Claims 1 through 4 and a spray dispenser, in particular based on an aqueous cleaning agent according to one of the preceding claims and a trigger spray bottle having a foam nozzle or a pump foam dispenser.
6. Use of a cleaning agent according to one of Claims 1 through 4 or a product according to Claim 5 for cleaning hard surfaces, in particular glass.
7. Method for streak-free cleaning of hard surfaces, characterized in that an aqueous cleaning agent according to one of Claims 1 through 4 is applied to the surface to be cleaned, using a spray dispenser having a foam nozzle, or a pump foam dispenser, and the foam, optionally after an action time of up to 5 minutes, is rubbed onto the surface with a sponge, cloth, leather, or some other utensil customarily used for cleaning purposes, wherein the foam disintegrates and is taken up together with the dissolved dirt, so that no appreciable residue remains on the cleaned surface.