DE102009045644A1 - Cleaning agent with bentonites - Google Patents

Abstract

An aqueous cleaning agent for hard surfaces, which contains a surfactant combination of fatty alcohol ether sulfate and at least one other surfactant and 0.001 to 1% by weight of bentonite as an opacifier, can be used for manual washing of dishes.

Description

The invention relates to an aqueous cleaning agent for hard surfaces, which contains a surfactant combination of fatty alcohol ether sulfate and at least one other surfactant and 0.001 to 1 wt .-% bentonites. This cleaning agent is preferably used for manual dishwashing.

Hard surface cleaners are often clear and translucent. For some detergent formulations, however, a cloudy appearance is desired. This applies above all, but not exclusively, to formulations which also have a nourishing effect, since the milky, cloudy appearance suggests gentle and gentle properties to the end user. To this end, detergents have been frequently added to polyacrylate dispersions. However, these have the disadvantage that it can lead to incompatibilities with cationically charged ingredients. In addition, for ecological reasons, it is desirable to reduce the proportion of petrochemical-based ingredients in favor of the proportion of ingredients derived from natural sources. However, polyacrylate dispersions are among the petrochemical-based ingredients.

It was therefore desirable to find an alternative to the opacifiers previously used, which is compatible with cationic ingredients and not of petrochemical origin, without sacrificing performance.

It now turns out that bentonites are outstandingly suitable for clouding detergent formulations. Bentonites are of mineral origin and therefore have a neutral life cycle assessment. In addition, there are no intolerances to cationic ingredients, so that compositions with such cationic ingredients have a higher stability. The cleaning agents obtained show the same good cleaning performance as clouded with conventional substances means.

Accordingly, the subject matter of the present invention is an aqueous hard surface cleaning composition which contains a surfactant combination of fatty alcohol ether sulfate and at least one further surfactant and 0.001 to 1% by weight of bentonites.

This detergent is especially suitable as a hand dishwashing detergent. A further subject of the present application is accordingly the use of the cleaning agent according to the invention for the manual rinsing of dishes.

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 for their vegetable base as based on renewable raw materials for environmental reasons, but without limiting the teaching of the invention to them. In particular, the oxo alcohols or their derivatives which are obtainable, for example, by the ROELEN's oxo synthesis can also be used correspondingly.

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 referred to below, where appropriate, according to the International Nomenclature Cosmetic Ingredient (INCI) nomenclature. Chemical compounds carry an INCI name in English, plant ingredients are listed exclusively in 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) to remove that from The Cosmetic, Toiletry and Fragrance Association (CTFA), 1101 17th Street, NW, Suite 300, Washington, DC 20036, USA , which publishes more than 9,000 INCI names and references to more than 37,000 trade names and technical names, including related distributors from over 31 countries. The International Cosmetic Ingredient Dictionary and Handbook assigns to the ingredients one or more chemical classes, such as polymeric ethers, and one or more functions, such as surfactant cleansing agents, which are further explained and discussed below possibly also referred to. 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.

bentonite

Bentonites are clays and rocks that contain smectites, especially montmorillonite, as main minerals. Its INCI name is Magnesium Aluminum Silicate. Bentonites are commercially available, for example, under the trade name Detersoft A (Laviosa Chimica Mineraria S.p.A.). The agent according to the invention contains from 0.001 to 1% by weight of bentonites. The addition of bentonites turbidity of the aqueous cleaning agent is achieved. The degree of turbidity is determined nephelometrically. For this purpose, the intensity of the scattered light, which emerges at right angles to the light beam entering the sample, is measured. The turbidity value is given in NTU (nephelometric turbidity units). The agent according to the invention preferably has a turbidity value of 10 to 1000 NTU.

surfactants

The composition of the invention contains surfactants in a total amount of usually 7 to 40 wt .-%, preferably 10 to 35 wt .-%. Both surfactants are a surfactant combination of fatty alcohol ether sulfate and at least one other surfactant.

In addition to alkyl ether sulfates, the composition according to the invention can therefore additionally comprise one or more further anionic surfactants, amphoteric surfactants, nonionic surfactants and / or cationic surfactants, in particular for improving cleaning action, run-off behavior and / or drying behavior. The further surfactant is particularly preferably selected from the group comprising nonionic surfactants, in particular fatty alcohol polyglycol ethers, betaine surfactants, secondary alkanesulfonates and mixtures thereof

The alkyl ether sulfates and alkyl sulfonates and the other anionic surfactants are usually used as alkali metal, alkaline earth metal and / or mono-, di- or Trialkanolammoniumsalz and / or in the form of their with the corresponding alkali metal hydroxide, alkaline earth metal hydroxide and / or mono-, di- or trialkanolamine used in situ to be neutralized corresponding acid. Preference is given here as alkali metals potassium and sodium in particular, as alkaline earth metals calcium and magnesium in particular, and as alkanolamines mono-, di- or triethanolamine. Particularly preferred are the sodium salts.

alkyl ether

Alkyl ether sulfates (fatty alcohol ether sulfates, INCI alkyl ether sulfates) are products of sulfation reactions on alkoxylated alcohols. In this context, the person skilled in the art generally understands, under 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, ie with aliphatic straight-chain or one or more branched, acyclic or cyclic, saturated or mono- or polyunsaturated, preferably straight-chain, acyclic, saturated, alcohols having 6 to 22, preferably 8 to 18, in particular 10 to 16 and particularly preferably 12 to 14 carbon atoms. 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 (n = 1 to 30, preferably 1 to 20, especially 1 to 10, particularly preferably 2 to 4). Another embodiment of the alkoxylation is the use of mixtures of the alkylene oxides, preferably the mixture of ethylene oxide and propylene oxide. Very particularly preferred for the purposes of the present invention are low-ethoxylated fatty alcohols having 1 to 4 ethylene oxide units (EO), in particular 1 to 2 EO, for example 2 EO, such as Na-C _12-14 fatty alcohol + 2EO sulfate.

In one preferred embodiment, the composition according to the invention contains one or more alkyl ether sulfates in an amount of 5 to 30% by weight, preferably 7 to 20% by weight.

Betaine

Suitable betaines are the alkylbetaines, the alkylamidobetaines, the imidazolinium betaines, the sulfobetaines (INCI Sultaines) and the phosphobetaines and preferably satisfy formula I, R ¹ - [CO-X- (CH ₂ ) _n ] _x -N ⁺ (R ² ) (R ³ ) - (CH ₂ ) _m - [CH (OH) -CH ₂ ] _y -Y ^- (I) in the
R ¹ is a saturated or unsaturated C _6-22 alkyl, preferably C _8-18 alkyl group, preferably a saturated C _10-16 alkyl group, for example a saturated C _12-14 alkyl group,
X is NH, NR ⁴ with the C _1-4 -alkyl radical R ⁴ , O or S,
n is a number from 1 to 10, preferably 2 to 5, in particular 3,
x is 0 or 1, preferably 1,
R ² , R ^{3 are} independently a C _1-4 alkyl radical, optionally hydroxy-substituted, such as. B. a hydroxyethyl radical, but especially a methyl radical,
m is a number from 1 to 4, in particular 1, 2 or 3,
y is 0 or 1 and
Y is COO, SO ₃ , OPO (OR ⁵ ) O or P (O) (OR ⁵ ) O, wherein R ^{5 is} hydrogen H or C _1-4 alkyl.

The alkyl and alkylamido betaines, betaines of the formula I having a carboxylate group (Y ^- = COO ^- ) are also called carbobetaines.

Preferred betaines are the alkylbetaines of the formula (Ia), the alkylamidobetaines of the formula (Ib), the sulfobetaines of the formula (Ic) and the amidosulfobetaines of the formula (Id), R ¹ -N ⁺ (CH ₃ ) ₂ -CH ₂ COO ^- (Ia) R ¹ -CO-NH- (CH ₂ ) ₃ -N ⁺ (CH ₃ ) ₂ -CH ₂ COO ^- (Ib) R ^{1 is} -N ⁺ (CH ₃ ) ₂ -CH ₂ CH (OH) CH ₂ SO ₃ ^- (Ic) R ¹ -CO-NH- (CH ₂ ) ₃ -N ⁺ (CH ₃ ) ₂ -CH ₂ CH (OH) CH ₂ SO ₃ ^- (Id) in which R ^{1 has} the same meaning as in formula I.

Particularly preferred betaines are the carbo-betaines, in particular the carbo-betaines of the formula (Ia) and (Ib), most preferably the alkylamido-betaines of the formula (Ib). A preferred betaine is, for example, cocamidopropyl betaine (cocoamidopropylbetaine).

The agent of the invention contains one or more betaines in an amount of usually 1 to 10 wt .-%, preferably 2 to 8 wt .-%.

alkylsulfonates

The agents according to the invention preferably also contain one or more alkylsulfonates. The alkyl sulfonates (INCI sulfonic acids) usually have an aliphatic straight-chain or mono- or poly-branched, acyclic or cyclic, saturated or mono- or polyunsaturated, preferably branched, acyclic, saturated, alkyl radical having 6 to 22, preferably 9 to 20, in particular 11 to 18 and particularly preferably 14 to 17 carbon atoms.

Accordingly, suitable alkyl sulfonates are the saturated alkanesulfonates, the unsaturated olefin sulfonates and the ether sulfonates which are derived formally from the alkoxylated alcohols on which the alkyl ether sulfates are based, in which terminal ether sulfonates (n-ether sulfonates) having a sulfonate function bonded to the polyether chain are present Ethersulfonate (i-ether sulfonates) with associated with the alkyl radical sulfonate function. Preference according to the invention is given to the alkanesulfonates, in particular alkanesulfonates having a branched, preferably secondary, alkyl radical, for example the secondary alkanesulfonate sec. Na C _13-17 alkanesulfonate (INCI Sodium C14-17 Alkyl Sec Sulfonate).

The agent according to the invention preferably contains one or more secondary alkanesulfonates in an amount of usually 1 to 10% by weight, preferably 2 to 8% by weight.

Nonionic surfactants

The agent according to the invention may additionally contain one or more nonionic surfactants, usually in an amount of 0.001 to 10 wt .-%, preferably 0.01 to 6 wt .-%, in particular 0.1 to 4 wt .-%, particularly preferably 0 , 2 to 2 wt .-%.

Nonionic surfactants in the context of the invention are alkoxylates such as polyglycol ethers, fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, endgroup-capped polyglycol ethers, mixed ethers and hydroxy mixed ethers and fatty acid polyglycol esters. Also suitable are block polymers of ethylene oxide and propylene oxide as well as fatty acid alkanolamides and fatty acid polyglycol ethers. Important classes of nonionic surfactants according to the invention are furthermore the amine oxides and the sugar surfactants, in particular the alkyl polyglucosides.

Fettalkoholpolyglykolether

Under Fettalkoholpolyglykolethern according to the invention with ethylene (EO) and / or propylene oxide (PO) alkoxylated, unbranched or branched, saturated or unsaturated C _10-22 alcohols having a degree of alkoxylation up to 30 to understand, preferably ethoxylated C _10-18 fatty alcohols a degree of ethoxylation of less than 30, preferably with a degree of ethoxylation of 1 to 20, in particular from 1 to 12, particularly preferably from 1 to 8, most preferably from 2 to 5, for example C _12-14 fatty alcohol ethoxylates with 2, 3 or 4 EO or a mixture of the C _12-14 fatty alcohol ethoxylates with 3 and 4 EO in a weight ratio of 1 to 1 or isotridecyl alcohol ethoxylate with 5, 8 or 12 EO.

amine oxides

The amine oxides suitable in accordance with the invention include alkylamine oxides, in particular alkyldimethylamine oxides, alkylamidoamine oxides and alkoxyalkylamine oxides. Preferred amine oxides satisfy formula II, R ⁶ R ⁷ R ⁸ N ⁺ -O ^- (II) R ⁶ - [CO-NH- (CH ₂ ) _w ] _z -N ⁺ (R ⁷ ) (R ⁸ ) -O ^- (II) in the R ^{6 is} a saturated or unsaturated C _6-22 alkyl radical, preferably C _8-18 alkyl radical, in particular a saturated C _10-16 alkyl radical, for example a saturated C _12-14 alkyl radical, in the Alkylamidoaminoxiden via a Carbonylamidoalkylengruppe -CO-NH- (CH ₂ ) _z and in the Alkoxyalkylaminoxiden via an oxaalkylene group -O- (CH ₂ ) _z is bonded to the nitrogen atom N, wherein z is in each case a number from 1 to 10, preferably 2 to 5, in particular 3,
R ⁷ , R ^{8 are} independently a C _1-4 alkyl radical, optionally hydroxy-substituted, such as. B. is a hydroxyethyl radical, in particular a methyl radical.

A preferred amine oxide is, for example, cocamidopropylamine oxides (cocoamidopropylamine oxide).

sugar surfactants

Sugar surfactants are known surface-active compounds, which include, for example, the sugar surfactant classes of the alkyl glucose esters, aldobionamides, gluconamides (sugar acid amides), glycerolamides, glycerol glycolipids, polyhydroxy fatty acid amide sugar surfactants (sugar amides) and alkyl polyglycosides. Preferred sugar surfactants within the scope of the teaching according to the invention are the alkyl polyglycosides and the sugar amides and their derivatives, in particular their ethers and esters. The ethers are the products of the reaction of one or more, preferably one, sugar hydroxy group with a compound containing one or more hydroxy groups, for example C _1-22 alcohols or glycols such as ethylene and / or propylene glycol, the sugar hydroxy group also being polyethylene glycol - And / or polypropylene glycol can carry. The esters are the reaction products of one or more, preferably one, sugar hydroxy group with a carboxylic acid, in particular a C _6-22 fatty acid.

sugar amides

Particularly preferred sugar amides satisfy the formula R'C (O) N (R '') [Z], in which R 'is a linear or branched, saturated or unsaturated acyl radical, preferably a linear unsaturated acyl radical, with 5 to 21, preferably 5 to 17, in particular 7 to 15, particularly preferably 7 to 13 carbon atoms, R "represents a linear or branched, saturated or unsaturated alkyl radical, preferably a linear unsaturated alkyl radical, having 6 to 22, preferably 6 to 18, in particular 8 to 16, particularly preferably 8 to 14 carbon atoms, a C _1-5 -alkyl radical, in particular a methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, tert-butyl or n-pentyl radical, or hydrogen and Z for a sugar residue, ie one Monosaccharide residue, stand. Particularly preferred sugar amides are the amides of glucose, the glucamides, for example lauroyl-methyl-glucamide.

Alkylpolyglykoside

The alkylpolyglycosides (APG) are particularly preferred sugar surfactants within the scope of the teaching according to the invention and preferably satisfy the general formula R'O (AO) _a [G] _x in which R 'is a linear or branched, saturated or unsaturated alkyl radical having 6 to 22 , preferably 6 to 18, in particular 8 to 16, particularly preferably 8 to 14 carbon atoms, [G] for a glycosidically linked sugar residue and x for a number from 1 to 10 and AO for an alkyleneoxy group, for. Example, an ethyleneoxy or Propylenoxygruppe, and a for the average degree of alkoxylation of 0 to 20. Here, the group (AO) _{a may} also contain different alkyleneoxy, z. B. ethyleneoxy or propyleneoxy, wherein it is then a at the average Gesamtalkoxylierungsgrad, ie the sum of Ethoxylierungs- and Propoxylierungsgrad acts. Unless otherwise stated below, the alkyl radicals R of the APG are linear unsaturated radicals having the specified number of carbon atoms.

APG are nonionic surfactants and are known substances that can be obtained by the relevant methods of preparative organic chemistry. The index number x indicates the degree of oligomerization (DP degree), i. H. The distribution of mono- and oligoglycosides, and stands for a number between 1 and 10. While x must always be integer in a given compound and can take here especially the values x = 1 to 6, the value x for a particular alkyl glycoside an analytically determined arithmetical variable, which usually represents a fractional number. Preferably, alkyl glycosides having a mean degree of oligomerization x of 1.1 to 3.0 are used. From an application point of view, those alkyl glycosides whose degree of oligomerization is less than 1.7 and in particular between 1.2 and 1.6 are preferred. The glycosidic sugar used is preferably xylose, but especially glucose. The alkyl or alkenyl radical R 'can be derived from primary alcohols having 8 to 18, preferably 8 to 14 carbon atoms. Typical examples are caproic alcohol, caprylic alcohol, capric alcohol and undecyl alcohol, and technical mixtures thereof, such as those obtained during the hydrogenation of technical fatty acid methyl esters or in the hydrogenation of aldehydes from ROELEN's oxosynthesis.

Preferably, however, the alkyl or alkenyl radical R 'is derived from lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol or oleyl alcohol. Also to be mentioned are elaidyl alcohol, petroselinyl alcohol, arachidyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol and technical mixtures thereof.

Particularly preferred APG are not alkoxylated (a = 0) and satisfy the formula RO [G] _x , in which R is as previously described for a linear or branched, saturated or unsaturated alkyl radical having 4 to 22 carbon atoms, [G] for a glycosidically linked sugar radical, preferably glucose residue, and x is a number from 1 to 10, preferably 1.1 to 3, in particular 1.2 to 1.6. Accordingly, preferred alkyl polyglycosides are, for example, C _8-10 and C _12-14 alkyl polyglucoside having a DP degree of 1.4 or 1.5, especially C _8-10 alkyl-1,5-glucoside and C _12-14 alkyl-1,4-glucoside.

Further anionic surfactants

The composition of the invention may additionally comprise one or more other anionic surfactants, usually in an amount of 0.001 to 5 wt .-%, preferably 0.01 to 4 wt .-%, in particular 0.1 to 3 wt .-%, particularly preferably 0.2 to 2 wt .-%, most preferably 0.5 to 1.5 wt .-%, for example, 1 wt .-%.

Suitable further anionic surfactants are, in particular, aliphatic sulfates such as fatty alcohol sulfates, monoglyceride sulfates and ester sulfonates (sulfo fatty acid esters), lignosulfonates, alkylbenzenesulfonates, fatty acid cyanamides, anionic sulfosuccinic surfactants (sulfosuccinates, sulfosuccinamates and sulfosuccinamides), fatty acid isethionates, acylaminoalkanesulfonates (fatty acid taurides), fatty acid sarcosinates, ether carboxylic acids and alkyl (ether) phosphates , Suitable further anionic surfactants are also anionic gemini surfactants having a diphenyl oxide basic structure, 2 sulfonate groups and an alkyl radical on one or both benzene rings according to the formula ^- O ₃ S (C ₆ H ₃ R) O (C ₆ H ₃ R ') SO ₃ ^- , in which R is an alkyl radical having, for example, 6, 10, 12 or 16 carbon atoms and R 'is R or H.

Other amphoteric surfactants

The amphoteric surfactants (amphoteric surfactants, zwitterionic surfactants) which can be used according to the invention include alkylamidoalkylamines, alkyl-substituted amino or iminoacids, for example aminopropionates, acylated amino acids or biosurfactants, of which the alkylamidoalkylamines are preferred within the scope of the teaching according to the invention.

Cationic surfactants

The composition according to the invention may additionally comprise one or more cationic surfactants (cationic surfactants), usually in an amount of 0.001 to 5% by weight, preferably 0.01 to 4% by weight, in particular 0.1 to 3% by weight, particularly preferably 0.2 to 2 wt .-%, most preferably 0.5 to 1.5 wt .-%, for example 1 wt .-%.

Preferred cationic surfactants are the quaternary surface-active compounds, in particular with an ammonium, sulfonium, phosphonium, iodonium or arsonium group, which are also known as antimicrobial agents. Through the use of quaternary surface-active compounds with antimicrobial action, the agent can be designed with an antimicrobial effect or its possibly existing antimicrobial effect due to other ingredients can be improved.

Particularly preferred cationic surfactants are the quaternary ammonium compounds (QAV, INCI quaternary ammonium compounds) according to the general formula (R ^I ) (R ^II ) (R ^III ) (R ^IV ) N ⁺ X ^- in the R ^I to R ^{IV are} identical or different C _1-22 -alkyl radicals, C _7-28 -aralkyl radicals or heterocyclic radicals, where two or, in the case of an aromatic incorporation as in pyridine, even three radicals together with the nitrogen atom denote the heterocycle, eg. A pyridinium or imidazolinium compound, and X ^{- are} halide ions, sulfate ions, hydroxide ions or like anions. For optimum antimicrobial activity, preferably at least one of the radicals has a chain length of 8 to 18, in particular 12 to 16, carbon atoms. QACs are by reacting tertiary amines with alkylating agents, such as. As methyl chloride, benzyl chloride, dimethyl sulfate, dodecyl bromide, but also ethylene oxide produced. The alkylation of tertiary amines with a long alkyl radical and two methyl groups succeeds particularly easily, and the quaternization of tertiary amines with two long radicals and one methyl group can be carried out with the aid of methyl chloride under mild conditions. Amines having three long alkyl radicals or hydroxy-substituted alkyl radicals are less reactive and are preferably quaternized with dimethyl sulfate.

In order to avoid possible incompatibilities of the cationic surfactants with the anionic surfactants present according to the invention, anionic surfactant-compatible and / or cationic surfactants are preferably used or, in a particular embodiment of the invention, cationic surfactants are completely dispensed with.

Water-soluble salts

The cleaning agent according to the invention may further comprise one or more water-soluble salts. These may be inorganic and / or organic salts, in a preferred embodiment it is at least one inorganic salt.

Inorganic salts which can be used according to the invention are preferably selected from the group comprising colorless water-soluble halides, sulfates, sulfites, carbonates, bicarbonates, nitrates, nitrites, phosphates and / or oxides of the alkali metals, alkaline earth metals, aluminum and / or transition metals; Furthermore, ammonium salts can be used. Particularly preferred are halides and sulfates of the alkali metals; Preferably, therefore, the inorganic salt is selected from the group comprising sodium chloride, potassium chloride, sodium sulfate, potassium sulfate and mixtures thereof. In a preferred embodiment, sodium chloride is used.

The organic salts which can be used according to the invention are, in particular, colorless water-soluble alkali metal, alkaline earth metal, ammonium, aluminum and / or transition metal salts of the carboxylic acids. Preferably, the salts are selected from the group comprising formate, acetate, propionate, citrate, malate, tartrate, succinate, malonate, oxalate, lactate and mixtures thereof.

In a particularly preferred embodiment, however, only inorganic salts are used, most preferably sodium chloride.

solvent

The aqueous agent according to the invention may advantageously contain, in addition to water, additionally one or more water-soluble organic solvents, usually in an amount of from 0.1 to 10% by weight, preferably from 1 to 8% by weight.

The solvent is used in the context of the teaching of the invention as needed in particular as a hydrotrope, viscosity regulator and / or cold stabilizer. It acts solubilizing and prevents the formation of liquid-crystalline phases. The viscosity of the agent according to the invention decreases with increasing amount of solvent. However, too much solvent can cause excessive viscosity drop. Finally, as the amount of solvent increases, the clouding and clearing point of the composition according to the invention decreases.

Suitable solvents are, for example, saturated or unsaturated, preferably saturated, branched or unbranched C _1-20 -hydrocarbons, preferably C _2-15 -hydrocarbons, having at least one hydroxy group and optionally one or more ether functions COC, ie the carbon atom chain interrupting oxygen atoms.

Preferred solvents are the - optionally unilaterally etherified with a C _1-6 alkanol - C _2-6 alkylene glycols and poly-C _2-3 alkylene glycol having an average of 1 to 9 identical or different, preferably the same, alkylene glycol groups per molecule, for example PPG -2 methyl ethers (dipropylene glycol monomethyl ether), as well as the C _1-6 alcohols, preferably ethanol, n-propanol or iso-propanol, especially ethanol.

Preferably, the solvent is selected from the group comprising methanol, ethanol, propanol, isopropanol, ethylene glycol, propylene glycol and mixtures thereof; Particular preference is given to using ethanol, n-propanol and / or isopropanol, in particular ethanol. As a solubilizer, in particular for perfume and dyes, for example, alkanolamines and alkylbenzenesulfonates having 1 to 3 carbon atoms in the alkyl radical can be used in addition to the solvents described above.

Other ingredients

In addition to the components mentioned so far, the compositions according to the invention may contain further ingredients. These include, for example, other surfactants, additives for improving the flow and drying behavior, for adjusting the viscosity, for stabilization and other customary in manual dishwashing detergents and additives, such as UV stabilizers, perfume, pearlescing agents, other opacifiers, dyes, corrosion inhibitors, preservatives, organic salts, disinfectants, enzymes, pH adjusters and skin feel enhancing or nourishing additives.

thickener

For thickening, the composition according to the invention may additionally contain one or more polymeric thickeners.

Polymeric thickeners for the purposes of the present invention are the polyelectrolytes thickening polycarboxylates, preferably homopolymers and copolymers of acrylic acid, in particular acrylic acid copolymers such as acrylic acid-methacrylic acid copolymers, optionally with a polyalkenyl, especially an allyl ether of sucrose, pentaerythritol or propylene crosslinked , and the polysaccharides, especially heteropolysaccharides, as well as other common thickening polymers.

Suitable polysaccharides or heteropolysaccharides are 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 be used alternatively, but preferably in addition to a polysaccharide gum, 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, hydroxypropyl methyl or hydroxyethyl methyl cellulose or cellulose acetate.

The content of polymeric thickener is usually not more than 8 wt .-%, preferably between 0.1 and 7 wt .-%, particularly preferably between 0.5 and 6 wt .-%, in particular between 1 and 5 wt .-% and most preferably between 1.5 and 4% by weight, for example between 2 and 2.5% by weight.

In a preferred embodiment of the invention, however, the agent is free of polymeric thickeners.

Dicarboxylic acids (salts)

To stabilize the agent according to the invention, in particular at high surfactant content, one or more dicarboxylic acids and / or salts thereof can be added, in particular a composition of Na salts of adipic, succinic and glutaric acid, as described, for. B. under the trade name Sokalan DSC is available. The use is advantageously carried out in amounts of 0.1 to 8 wt .-%, preferably 0.5 to 7 wt .-%, in particular 1.3 to 6 wt .-% and particularly preferably 2 to 4 wt .-%.

A change in the dicarboxylic acid (salt) content can - especially in amounts above 2 wt .-% - contribute to a clear solution of the ingredients. Also, within certain limits, influencing the viscosity of the mixture by this means is possible. Furthermore, this component influences the solubility of the mixture. This component is particularly preferably used at high surfactant contents, in particular at surfactant contents above 30 wt .-%.

However, if it is possible to dispense with their use, the agent according to the invention is preferably free from dicarboxylic acid (salts).

Auxiliaries and additives

. B. Cutina ^® AGS from Cognis, for example glycol distearate, z; - in particular in hand dishwashing detergents and cleaning agents for hard surfaces - conventional auxiliaries and additives, in particular UV stabilizers, perfumes, pearlescent agents (INCI opacifying agents next to one or more further can. , or mixtures comprising such. as the Euperlane ^® from. Cognis), more opacifiers, dyes, corrosion inhibitors, preservatives (e.g., as the technical also known as Bronopol 2-bromo-2-nitropropane-1,3 diol (CAS 52-51-7) which is commercially available for example as Myacide ^® BT or as Boots Bronopol BT from Boots), organic salts, disinfectants, enzymes, pH-adjusting agents and skin feel improving or skin-care additives (eg. B Dermatologically active substances such as vitamin A, vitamin B2, vitamin B12, vitamin C, vitamin E, D-panthenol, sericerin, collagen partial hydrolyzate, various vegetable proteins n-partial hydrolysates, protein hydrolyzate-fatty acid condensates, liposomes, cholesterol, vegetable and animal oils such. As lecithin, soybean oil, etc., plant extracts such. , Aloe vera, azulene, witch hazel extracts, algae extracts, etc., allantoin, AHA complexes, glycerol, urea, quaternized hydroxyethyl cellulose) in amounts of usually not more than 5% by weight.

PH value

The pH of the agent according to the invention can be adjusted by means of customary pH regulators, for example acids such as mineral acids or citric acid and / or alkalis such as sodium or potassium hydroxide, wherein - in particular with the desired hand tolerance - a range from 4 to 9, preferably 5 to 8, in particular 5.5 to 7.5, is preferred. For adjusting and / or stabilizing the pH, the agent according to the invention may contain one or more buffer substances (INCI Buffering Agents), usually in amounts of 0.001 to 5 wt .-%, preferably 0.005 to 3 wt .-%, in particular 0 , 01 to 2 wt .-%, particularly preferably 0.05 to 1 wt .-%, most preferably 0.1 to 0.5 wt .-%, for example, 0.2 wt .-%. Preference is given to buffer substances which are at the same time complexing agents or even chelating agents (INCI chelating agents). Particularly preferred buffer substances are the citric acid or the citrates, in particular the sodium and potassium citrates, for example trisodium citrate.2H ₂ O and tripotassium citrate H ₂ O.

use

The composition according to the invention can be used for cleaning hard surfaces, in particular for manual cleaning of dishes.

embodiments

Five formulations according to the invention E1 to E5 were first prepared, the composition of which is shown in the table below. The quantities are in wt .-% active ingredient. Furthermore, comparative formulations V1 to V5 were prepared in which instead of bentonites the polyacrylate / styrene dispersion Acusol was used as an opacifier in appropriate amounts. The preservative used was in each case Parmetol ^® A 28 S, a water-based combination of chloromethyl and methylisothiazolinone and 2-bromo-2-nitropropane-1,3-diol. E1 E2 E3 E4 E5 cocoamidopropyl 4.57 4.57 4.57 4.57 4.57 Sodium Laureth Sulfate 11.43 11.43 11.43 11.43 11.43 sodium chloride 0.80 0.80 0.80 0.80 0.80 preservative 0.10 0.10 0.10 0.10 0.10 bentonite 0.25 0.20 0.15 0.10 0.05 Perfume 0.15 0.15 0.15 0.15 0.15 dye + + + + + water Ad 100% Ad 100% Ad 100% Ad 100% Ad 100%

Both the formulations of the invention and the comparative formulations had good cleaning performance. Turbidity measurements with the nephelometer revealed slightly lower but still satisfactory haze values: E1 E2 E3 E4 E5 NTU 865 710 477 291 192 V1 V2 V3 V4 V5 NTU 1000 958 723 586 389

Subsequently, a further composition E6 according to the invention and a comparison formulation V6 were prepared which contained a cationic ingredient. The composition is shown in the table below, again all amounts in wt .-% of active substance. E6 V6 cocoamidopropyl 2.13 2.13 Sodium Laureth Sulfate 9.20 9.20 Sodium C14-17-sec-alkylsulfonate 2.30 2.30 ethanol 3.00 3.00 citric acid 0.11 0.12 Polyquaternium-10 0.20 0.20 preservative 0.10 0.10 sodium chloride 1.95 2.20 Perfume 0.15 0.15 bentonite 0.01 - Acusol OP 301 - 0,004 water Ad 100 Ad 100 PH value 5.5 5.5 Viscosity, 20 ° C 1040 1079 Storage stability 40 ° C, 2 weeks Slightly cloudy Slightly cloudy, flocculation Storage stability 40 ° C, 4 weeks Slightly cloudy precipitation Storage stability 20 ° C, 2 weeks Slightly cloudy precipitation Storage stability 20 ° C, 4 weeks Slightly cloudy precipitation

The composition of the present invention retained its slightly cloudy appearance even after storage, while the comparative formulation was not stable due to the interaction of the acrylate copolymer with the cationic ingredient Polyquaternium-10 but showed flocculation or precipitation.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• International Cosmetic Ingredient Dictionary and Handbook Seventh Edition (1997) [0009]
• The Cosmetic, Toiletry, and Fragrance Association (CTFA), 1101 17th Street, NW, Suite 300, Washington, DC 20036, USA [0009]

Claims (10)

An aqueous cleaning agent for hard surfaces, comprising a surfactant combination of fatty alcohol ether sulfate and at least one further surfactant, characterized in that it contains 0.001 to 1 wt .-% bentonites. An aqueous detergent according to claim 1, characterized in that the further surfactant is preferably selected from the group comprising nonionic surfactants, especially fatty alcohol polyglycol ethers, betaine surfactants, secondary alkanesulfonates and mixtures thereof. An aqueous cleaning agent according to any one of claims 1 and 2, characterized in that the fatty alcohol ether sulfate is preferably contained in amounts of 5 to 30 wt .-%, particularly preferably 7 to 20 wt .-%. An aqueous cleaning agent according to any one of claims 1 to 3, characterized in that the further surfactant is a secondary alkanesulfonate, preferably in amounts of 1 to 10 wt .-%, particularly preferably 2 to 8 wt .-%, is included. An aqueous cleaning agent according to any one of the preceding claims, characterized in that a further surfactant is a betaine surfactant, preferably in amounts of 1 to 10 wt .-%, particularly preferably 2 to 8 wt .-%, is included. An aqueous cleaning agent according to any one of the preceding claims, characterized in that the further surfactant is a nonionic surfactant, preferably a fatty alcohol polyglycol ether, preferably in amounts of 0.001 to 10 wt .-%, particularly preferably 0.01 to 6 wt .-%, more preferably 0.1 to 4 wt .-%, in particular 0.2 to 2 wt .-%. An aqueous cleaning agent according to any one of the preceding claims, characterized in that it has a haze value of 10 to 1000 NTU. An aqueous detergent according to any one of the preceding claims, characterized in that it contains at least one water-soluble salt, preferably a water-soluble inorganic salt. An aqueous detergent according to any one of the preceding claims, characterized in that it contains further ingredients commonly used in hard surface cleaners, preferably selected from the group comprising other surfactants, bases, acids, viscosity modifiers, fatty acids, solvents, other polymers, antibacterial agents, Preservatives, solubilizers, complexing agents, enzymes, dyes, fragrances, pearlescing agents, other opacifiers, stabilizers, pH adjusters, skin feel-improving or skin care additives and mixtures thereof. Use of an aqueous cleaning agent according to one of the preceding claims for the manual rinsing of dishes.