EP3858963A1 - Manual dishwashing compositions with short-chain amine oxide distribution - Google Patents

Abstract

A hand dishwashing composition comprising: at least one surfactant, wherein the at least one surfactant is an amine oxide, and wherein the proportion of amine oxides having a C18 or greater residue is less than 10% based on the total weight of the amine oxides in the composition, the agent being particularly suitable for the self-releasing removal of fat and increasing the foam volume.

Description

Dishwashing detergents, in particular liquid dishwashing detergents for the manual cleaning of dishes, are known. However, consumers want improved cleaning power. The object of the present invention was therefore to provide new dishwashing detergents with good cleaning power, in particular good self-degreasing power and good foam volume.

This object was surprisingly achieved by the inventors of the present invention by providing a dishwashing detergent comprising: at least one surfactant, the at least one surfactant being an amine oxide, and
where the proportion of amine oxides,
which have a C18 or longer residue is less than 10% based on the total weight of the amine oxides in the composition, more preferably less than 3%.

It was surprisingly found that compositions of this type, in particular compositions which are essentially free of amine oxides which have a C18 or longer radical, in particular essentially C12 to C14, have particularly good fat-dissolving properties with good foam volume at the same time.

Hand dishwashing composition wherein the proportion of amine oxides which have a C16 or more residue is less than 20%, more preferably less than 10%, based on the total weight of the amine oxides in the composition.

Hand dishwashing composition, the proportion of amine oxides which have a C12 residue being between 50 and 85% based on the total amount of amine oxide, preferably between 60 and 85%.

Hand dishwashing composition, the proportion of amine oxides having a C14 residue being between 20 and 35% based on the total amount of amine oxide.

Hand dishwashing composition, the proportion of amine oxides which have only C10 or smaller residues being less than 5% based on the total amount of amine oxide.

A hand dishwashing composition wherein the amine oxide is present in a total amount of at least 0.5% by weight based on the total weight of the composition.

A hand dishwashing composition wherein the surfactant system contains at least one anionic surfactant selected from ether sulfates, alkyl sulfates and mixtures thereof. A hand dishwashing composition, wherein the anionic surfactant is present in an amount of at least 4% by weight based on the total weight of the composition.

Hand dishwashing composition where the dishwashing composition has at least one additional ingredient selected from the group consisting of water, enzymes, organic solvents, enzymes, additives to improve the drainage and drying behavior, to adjust the viscosity and / or for stabilization, UV stabilizers, perfume, pearlescent agents, Contains colorants, corrosion inhibitors, preservatives, bitter substances, organic salts, disinfectants, structuring polymers, defoamers, encapsulated ingredients, pH adjusters and additives that improve or care for the skin.

Use of a composition according to any one of the preceding claims for self-releasing grease removal and / or for increasing the lather volume of the composition.

The ability of the composition to dissolve fats, even without additional mechanical action, is called self-dissolving removal or self-degreasing power. In connection with hand dishwashing detergents, this is particularly the property of loosening grease from dishes, even without additional mechanical action from a sponge or brush.

In a further aspect, the present invention is also directed to the use of the dishwashing agent according to the invention for the manual cleaning of dishes.

"At least one" as used herein refers to 1 or more, for example 2, 3, 4, 5, 6, 7, 8, 9 or more. In connection with constituents of the compounds described herein, this indication does not refer to the absolute amount of molecules, but to the type of constituent. “At least one surfactant” therefore means, for example, that only one type of surfactant compound or several different types of surfactant compounds can be contained without specifying the amount of the individual compounds.

Unless otherwise stated, all of the quantities given in connection with the dishwashing detergents described herein relate to% by weight, in each case based on the total weight of the dishwashing detergent. Furthermore, quantities of this type which relate to at least one constituent always relate to the total amount of this type of constituent contained in the dishwashing detergent, unless explicitly stated otherwise. This means that such quantities, for example in connection with “at least one surfactant”, relates to the total amount of surfactants which are contained in the dishwashing detergent, unless explicitly stated otherwise.

Numerical values that are given herein without decimal places refer to the full stated value with one decimal place. For example, "99%" stands for "99.0%".

The terms "approximately" "approx." or “about”, in connection with a numerical value, relates to a variance of ± 10% based on the specified numerical value, preferably ± 5%, particularly preferably ± 1%.

The expression “essentially free of” means that the respective compound can in principle be included, but is then present in an amount that does not impair the function of the other components. In the context of the present invention, the property “essentially free of” a certain compound is therefore preferably a total weight of less than 0.1% by weight, more preferably less than 0.001% by weight, in particular free of this, based on the total weight of dishwashing detergent.

Numeric ranges given in the format "in / from x to y" include the stated values. If several preferred numerical ranges are given in this format, it is understood that all ranges resulting from the combination of the various endpoints are also recorded.

Information on the molecular weight relates to the weight average molecular weight in g / mol, unless the number average molecular weight is explicitly mentioned. Molecular weights are preferably determined by GPC using polystyrene standards.

In the context of the present invention, fatty acids or fatty alcohols or their derivatives - unless otherwise stated - represent branched or unbranched carboxylic acids or alcohols or their derivatives with preferably 6 to 22 carbon atoms. In particular, the oxo alcohols or derivatives thereof obtainable, for example, by ROELEN's oxo synthesis, can also be used accordingly.

If components of the present agents are salts, they are preferably alkali metal or alkaline earth metal salts of the respective compounds, more preferably the alkali metal salts, in particular the sodium or potassium salts, most preferably sodium salts thereof. Whenever in the following alkaline earth metals as counterions for monovalent Anions are mentioned, this means that the alkaline earth metal is of course only present in half the amount of substance - sufficient to balance the charge - as the anion.

In the present invention, substituted radicals are preferably those radicals in which the substituent is selected from -F, -Cl, -Br, -OH, -OC1-4alkyl, = O, -NH2, or -N (C1-4alkyl) 2 , The substituent preferably replaces one or more H atoms.

These and other aspects, features and advantages of the invention will become apparent to those skilled in the art from a study of the following detailed description and claims. Each feature or each embodiment from one aspect of the invention can be used in any other aspect of the invention. For example, described features or embodiments of the dishwashing detergents can also be applied to the claimed uses, and vice versa. Furthermore, it goes without saying that the examples contained herein are intended to describe and illustrate the invention, but not to restrict it, and in particular the invention is not limited to these examples.

The dishwashing detergent according to the invention is preferably essentially free from cationic surfactants.

According to one embodiment, the composition has at least one alkylbenzenesulfonate, which is preferably one
C2-18 have alkyl radical. It is particularly preferably cumene sulfonate. According to the invention, the feature alkylbenzenesulfonate is understood to mean only a benzene ring which is substituted by an alkyl radical and which also bears a sulfonate radical.

In preferred embodiments, the at least one alkylbenzenesulfonate is present in 0.5 to 50% by weight, preferably 0.5 to 30% by weight, particularly preferably 0.5 to 5% by weight, based on the total weight of the dishwashing detergent .

The at least one fatty alcohol sulfate is preferably selected from C8-18 fatty alcohol sulfates, particularly preferred fatty alcohol sulfates are derived from C12-18 fatty alcohols, for example coconut fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol. In particular, sodium lauryl sulfate is preferred.

In preferred embodiments, the at least one fatty alcohol sulfate is contained in 0.5 to 45% by weight, preferably 0.5 to 40% by weight, more preferably 3 to 15% by weight, based on the total weight of the dishwashing detergent.

In a preferred embodiment, the at least one amine oxide is a compound which has the formula R1R2R3NO, where each R1, R2 and R3, independently of the others, is an optionally substituted, for example hydroxy-substituted, C1-C30 hydrocarbon chain. Amine oxides used with particular preference are those in which R1 is C10-C16 alkyl and R2 and R3 are each independently C1-C4 alkyl, in particular C10-C16 alkyldimethylamine oxides. Exemplary representatives of suitable amine oxides are N-cocoalkyl-N, N-dimethylamine oxide and N-tallow alkyl-N, N-dihydroxyethylamine oxide. The at least one amine oxide is preferably selected from C12-16 amine oxides, particularly preferably from low-chain C12-14 alkyldimethylamine oxides.

In preferred embodiments, the at least one amine oxide is contained in 0.1 to 20% by weight, preferably 0.3 to 10% by weight, more preferably 0.5 to 3% by weight, based on the total weight of the dishwashing detergent .

If present, the at least one further anionic, nonionic or zwitterionic surfactant is preferably in 0.1 to 45% by weight, preferably 0.5 to 40% by weight, more preferably in 1 to 25% by weight, based on the total weight of the dishwashing detergent.

All anionic surfactants known for dishwashing detergents are suitable as further anionic surfactants.

Suitable further surfactants are, for example, alpha-olefin sulfonates. Preferred alpha olefin sulfonates are selected from C10-20 alpha olefin sulfonates, more preferably from linear C10-20 alpha olefin sulfonates. In particular, it is selected from C12-14 alpha olefin sulfonates; most preferably it is a linear C12-14 alpha olefin sulfonate.

The at least one alpha-olefin sulfonate is preferably contained in 2.5 to 45% by weight, more preferably 3 to 30% by weight, particularly preferably 5 to 25% by weight, based on the total weight of the dishwashing detergent.

A suitable alpha-olefin sulfonate is commercially available, for example, under the trade name Bio-Terge® AS-40 from Stephan.

In one embodiment, the at least one further anionic surfactant is selected from ether sulfates, alkyl sulfates and mixtures thereof.

Preferred ether sulfates are those of the formula (I)

R1-O- (AO) n-SO3- X + (I).

In this formula (I), R1 represents a linear or branched, substituted or unsubstituted alkyl radical, preferably a linear, unsubstituted alkyl radical, particularly preferably a fatty alcohol radical. Preferred radicals R1 are selected from decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl radicals and mixtures thereof, the representatives with an even number of carbon atoms are preferred. Particularly preferred radicals R1 are derived from C12-C18 fatty alcohols, for example from coconut fatty alcohol, tallow fatty alcohol, lauryl, myristyl, cetyl or stearyl alcohol or from C10-C20 oxo alcohols.

X stands for a monovalent cation or the nth part of an n-valent cation, preferred are the alkali metal ions, including Na + or K +, Na + being extremely preferred. Further cations X + can be selected from NH4 +, ½ Zn2 +, ½ Mg2 +, ½ Ca2 +, ½ Mn2 +, and mixtures thereof.

AO stands for an ethylene oxide (EO) or propylene oxide (PO) group, preferably an ethylene oxide group. The index n stands for an integer from 1 to 50, preferably from 1 to 20 and in particular from 2 to 10. Very particularly preferably n stands for the numbers 2, 3, 4, 5, 6, 7 or 8.

Further suitable anionic surfactants are the alkyl sulfates, which are not derived from fatty alcohols, of the formula

R2-O-SO3- X + (II).

In this formula (II), R2 stands for a linear or branched, substituted or unsubstituted alkyl radical, preferably a linear, unsubstituted alkyl radical, particularly preferably a fatty alcohol radical. Preferred radicals R2 are selected from decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, nonadecyl, eicosyl radicals and mixtures thereof, the representatives with an even number of carbon atoms are preferred. They are particularly preferably derived from C10-20 oxo alcohols.

X stands for a monovalent cation or the nth part of an n-valent cation, preferred are the alkali metal ions, including Na + or K +, Na + being extremely preferred. Further cations X + can be selected from NH4 +, ½ Zn2 +, ½ Mg2 +, ½ Ca2 +, ½ Mn2 +, and mixtures thereof.

If present, the at least one further nonionic surfactant is in 0.1 to 20% by weight, preferably 0.5 to 10% by weight, more preferably 1 to 8% by weight, based on the total weight of the dishwashing detergent contain.

All nonionic surfactants known for dishwashing detergents are suitable as further nonionic surfactants.

In one embodiment, the at least one further nonionic surfactant is selected from alkoxylated fatty acid alkyl esters, polyhydroxy fatty acid amides, alkyl glycosides and alkoxylated alcohols and mixtures thereof.

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

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

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

In one embodiment, the further nonionic surfactants are selected from the group of alkoxylated alcohols. The nonionic surfactants used are preferably alkoxylated, advantageously ethoxylated, in particular primary alcohols with preferably 8 to 18 carbon atoms and an average of 1 to 12 moles of ethylene oxide (EO) or propylene oxide (PO) per mole of alcohol, in which the alcohol radical is linear or preferably in 2 -Position can be methyl-branched or can contain linear and methyl-branched radicals in the mixture, as they are usually present in oxo alcohol radicals. In particular, however, alcohol ethoxylates with linear radicals of alcohols of native origin with 12 to 18 carbon atoms, for example from coconut, palm, tallow or oleyl alcohol, and an average of 2 to 8 moles of EO per mole of alcohol are preferred. The preferred ethoxylated alcohols include, for example, C12-14 alcohols with 3 EO or 4 EO, C8-11 alcohol with 7 EO, C13-15 alcohols with 3 EO, 5 EO, 7 EO or 8 EO, C12-18- Alcohols with 3 EO, 5 EO or 7 EO and mixtures of these, such as mixtures of C12-14 alcohol with 3 EO and C12-18 alcohol with 5 EO.

In various embodiments, the total amount of surfactants, i.e. the surfactant system, based on the weight of the agent, is 2.5 to 70% by weight, preferably 5 to 60% by weight, even more preferably 6 to 50% by weight.

The dishwashing detergent according to the present invention can also contain at least one additional ingredient selected from the group consisting of water, organic solvents, enzymes, additives to improve the drainage and drying behavior, to adjust the viscosity and / or for stabilization, UV stabilizers, perfume, Pearlescent agents, dyes, corrosion inhibitors, preservatives, bitter substances, organic salts, disinfectants, structuring polymers, defoamers, encapsulated ingredients, pH adjusters and additives that improve or care for the skin.

In one embodiment, the dishwashing detergents according to the present invention are liquid and contain water as the main solvent, i.e. they are aqueous dishwashing detergents. The water content of the aqueous agent according to the invention is usually 15 to 90% by weight, preferably 20 to 60% by weight.

In addition, organic solvents can be added to the dishwashing detergent. Suitable organic solvents include monohydric or polyhydric alcohols, alkanolamines or glycol ethers, provided they are miscible with water in the specified concentration range. The solvents are preferably selected from ethanol, n-propanol, i-propanol, butanols, glycol, propanediol, butanediol, methylpropanediol, glycerol, diglycol, propyl diglycol, butyl diglycol, hexylene glycol, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol ether, ethylene glycol propyl ether, Diethylene glycol ethyl ether, propylene glycol methyl ether, propylene glycol ethyl ether, propylene glycol propyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, methoxy triglycol, ethoxy triglycol, butoxy triglycol, 1-butoxyethoxy-2-propanol, propylene-butoxyethoxy-2-propanol, propylene-butoxy-3-butyl ether, and mixtures of these n-butoxyethoxy-2-propanol, 3-butyl-3-butylether, propylene, propylene-octanol, propylene-octanolether, propylene-butyl-3-ethanol, propylene-butoxyethoxy-2-propanol, propylene-butoxyethoxy-2-propanol, propylene-butoxy-3-butylether, propylene-butoxyethoxy-2-propanol, propylene-butoxyethoxy-2-propanol, propylene-butoxy-3-ether, propylene-butoxy-3-ether, propylene glycol propylether, dipropylene glycol monomethylether, 3-butyl-3-meth Solvent. In particular, ethanol is preferred. The organic solvent is preferably contained in 0.1 to 10% by weight, based on the total weight of the dishwashing detergent.

In various embodiments, the dishwashing detergents described herein can also contain at least one enzyme, preferably a protease. The proteases used are preferably alkaline serine proteases. They act as unspecific endopeptidases, that is, they hydrolyze any acid amide bonds that are inside peptides or proteins, thereby breaking down protein-containing soiling on the items to be cleaned. Their pH optimum is usually in the clearly alkaline range.

• der Alkalischen Protease aus Bacillus amyloliquefaciens (BPN'),
• der Alkalischen Protease aus Bacillus licheniformis (Subtilisin Carlsberg),
• der Alkalischen Protease PB92,
• Subtilisin 147 und/oder 309 (Savinase)
• der Alkalischen Protease aus Bacillus lentus, vorzugsweise aus Bacillus lentus (DSM 5483),
• der Alkalischen Protease aus Bacillus alcalophilus (DSM 11233),
• der Alkalischen Protease aus Bacillus gibsonii (DSM 14391) oder einer hierzu mindestens zu 70% identischen Alkalischen Protease,
• der Alkalischen Protease aus Bacillus sp. (DSM 14390) oder einer hierzu mindestens zu 98,5% identischen Alkalischen Protease, und
• der Alkalischen Protease aus Bacillus sp. (DSM 14392) oder einer hierzu mindestens zu 98,1 % identischen Alkalischen Protease.

The proteases preferably used according to the invention are preferably a serine protease, in particular a subtilase, particularly preferably a subtilisin. The subtilisin can be a wild-type enzyme or a subtilisin variant, the wild-type enzyme or the starting enzyme of the variant preferably being selected from one of the following:

• the alkaline protease from Bacillus amyloliquefaciens (BPN '),
• the alkaline protease from Bacillus licheniformis (subtilisin Carlsberg),
• the alkaline protease PB92,
• Subtilisin 147 and / or 309 (Savinase)
• the alkaline protease from Bacillus lentus, preferably from Bacillus lentus (DSM 5483),
• the alkaline protease from Bacillus alcalophilus (DSM 11233),
• the alkaline protease from Bacillus gibsonii (DSM 14391) or an alkaline protease that is at least 70% identical to this,
• the alkaline protease from Bacillus sp. (DSM 14390) or an alkaline protease that is at least 98.5% identical to this, and
• the alkaline protease from Bacillus sp. (DSM 14392) or an alkaline protease that is at least 98.1% identical to this.

Examples of the proteases that can be used in the agents described herein are subtilisin 309 or functional fragments / variants thereof and variants of the alkaline protease from Bacillus lentus or variants thereof. Subtilisin 309 is sold under the trade name Savinase® by Novozymes A / S, Bagsvaerd, Denmark. Optimized enzyme variants of the subtilisin 309 from Bacillus lentus are available from Novozymes under the trade names Blaze® and Ovozyme®, which represent a preferred embodiment of the invention. For example, the protease variants under the name BLAP® are derived from the alkaline protease from Bacillus lentus DSM 5483. Protease variants are particularly preferred here which have at least one mutation at R99 compared to the BLAP wt (wild type) enzyme, in the count according to BLAP wt, in particular R99E or R99D, particularly preferred is R99E, and optionally additionally at least one or two , preferably all three of the amino acid substitutions S3T, V4I and V199I, particularly preferred are the BLAP variants as they are in SeqID No 4 or 5 of the WO 2014/177430 are described.

In the dishwashing detergents described herein, the enzymes to be used can also be packaged together with accompanying substances, for example from fermentation. In liquid agents, the enzymes are preferably used as liquid enzyme formulation (s).

As a rule, the proteases are not provided in the form of the pure protein but rather in the form of stabilized, storable and transportable preparations. These ready-made preparations include, for example, those by granulation, extrusion or Solid preparations obtained by lyophilization or, in particular in the case of liquid or gel-form agents, solutions of the enzymes, advantageously as concentrated as possible, with little water and / or mixed with stabilizers or other auxiliaries.

Alternatively, the enzymes can be encapsulated both for the solid and for the liquid dosage form, for example by spray drying or extrusion of the enzyme solution together with a preferably natural polymer or in the form of capsules, for example those in which the enzymes are enclosed as in a solidified gel or in those of the core-shell type, in which an enzyme-containing core is coated with a protective layer which is impermeable to water, air and / or chemicals. Additional active ingredients, for example stabilizers, emulsifiers, pigments, bleaches or dyes, can also be applied in superimposed layers. Such capsules are applied by methods known per se, for example by shaking or rolling granulation or in fluid-bed processes. Such granules are advantageously low in dust, for example through the application of polymeric film-forming agents, and due to the coating are stable in storage.

It is also possible to pack two or more enzymes together so that a single granulate has several enzyme activities.

Dishwashing detergents according to the invention can alternatively or in addition to the at least one protease contain one or more further enzymes, in particular from the following group: amylases, hemicellulases, cellulases, lipases and oxidoreductases.

The dishwashing detergent according to the invention particularly preferably also contains at least one amylase.

The amylase (s) is preferably an α-amylase. The hemicellulase is preferably a β-glucanase, a pectinase, a pullulanase and / or a mannanase. The cellulase is preferably a cellulase mixture or a one-component cellulase, preferably or predominantly an endoglucanase and / or a cellobiohydrolase. The oxidoreductase is preferably an oxidase, in particular a choline oxidase, or a perhydrolase. The enzymes mentioned can all be formulated as described above for the proteases.

In dishwashing detergents according to the invention, which in one embodiment are predominantly liquid, pasty or gel form, the at least one enzyme, preferably the at least one protease and / or at least one amylase in an amount of 0.01-1.6% by weight, preferably 0.05-1.2% by weight based on the total weight of the dishwashing detergent.

In various embodiments, the enzyme (s) can be pre-formulated with enzyme stabilizers in an enzyme composition. The enzyme protein usually only forms a fraction of the total weight of the enzyme preparation. Enzyme preparations used with preference contain between 0.1 and 40% by weight, preferably between 0.2 and 30% by weight, particularly preferably between 0.4 and 20% by weight and in particular between 0.8 and 10% by weight % of the enzyme protein. In such compositions, an enzyme stabilizer can be included in the enzyme composition in an amount of 0.05-35% by weight, preferably 0.05-10% by weight, based on the total weight. This enzyme composition can then be used in dishwashing detergents according to the invention, specifically in amounts which lead to the final concentrations specified above in the dishwashing detergent. Suitable enzyme stabilizers are known in the prior art. In various embodiments, the agent according to the invention can accordingly additionally have one or more enzyme stabilizers.

The protein concentration can be determined with the aid of known methods, for example the BCA method (bicinchoninic acid; 2,2'-bichinolyl-4,4'-dicarboxylic acid) or the biuret method. In this regard, the active protein concentration is determined by titrating the active centers using a suitable irreversible inhibitor (for proteases, for example, phenylmethylsulfonyl fluoride (PMSF)) and determining the residual activity (cf. M. Bender et al., J. Am. Chem. Soc. 88, 24 (1966), pp. 5890-5913 ).

To further improve the drainage and / or drying behavior, the agent according to the invention can contain one or more additives from the group of polymers and builders, 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% by weight, extremely preferably 0.5 to 1.5% by weight, for example 1% by weight.

Polymeric thickeners for the purposes of the present invention are the polycarboxylates, preferably homopolymers and copolymers of acrylic acid, in particular acrylic acid copolymers such as acrylic acid-methacrylic acid copolymers, and the polysaccharides, in particular heteropolysaccharides, and other conventional thickening polymers.

Suitable polysaccharides or heteropolysaccharides are the polysaccharide gums, for example gum arabic, agar, alginates, carrageenans and their salts, guar, guaran, tragacanth, gellan, ramsan, dextran or xanthan and their derivatives, e.g. propoxylated guar, as well as their mixtures. Other polysaccharide thickeners, such as starches or cellulose derivatives, can be used as an alternative, but preferably in addition to a polysaccharide gum, for example starches of various origins and starch derivatives, e.g. 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.

Acrylic acid polymers suitable as polymeric thickeners are, for example, high molecular weight homopolymers of acrylic acid (INCI Carbomer) crosslinked with a polyalkenyl polyether, in particular an allyl ether of sucrose, pentaerythritol or propylene, which are also referred to as carboxyvinyl polymers.

Particularly suitable polymeric thickeners are, however, the following acrylic acid copolymers: (i) Copolymers of two or more monomers from the group of acrylic acid, methacrylic acid and their simple esters, preferably formed with C1 4 alkanols (INCI Acrylates Copolymers), which include, for example, the copolymers of methacrylic acid, butyl acrylate and methyl methacrylate (CAS 25035 69 2) or of butyl acrylate and methyl methacrylate (CAS 25852 37 3); (ii) crosslinked high molecular weight acrylic acid copolymers, to which, for example, the copolymers of C10-30 alkyl acrylates crosslinked with an allyl ether of sucrose or pentaerythritol with one or more monomers from the group of acrylic acid, methacrylic acid and their simple esters, preferably formed with C1 4 alkanols ( INCI Acrylates / C10-30 Alkyl Acrylate Crosspolymer).

The content of polymeric thickener is usually not more than 8% by weight, preferably between 0.1 and 7% by weight, particularly preferably between 0.5 and 6% by weight, in particular between 1 and 5% by weight and extremely preferably between 1.5 and 4% by weight, for example between 2 and 2.5% by weight, based on the total weight of the dishwashing detergent.

To stabilize the agent according to the invention, especially with a high surfactant content, one or more dicarboxylic acids and / or their salts can be added, in particular a composition of sodium salts of adipic, succinic and glutaric acid, such as those available under the trade name Sokalan® DSC is. They are advantageously used in amounts of 0.1 to 8% by weight, preferably 0.5 to 7% by weight, in particular 1.3 to 6% by weight and particularly preferably 2 to 4% by weight, based on the total weight of the dishwashing detergent.

However, if their use can be dispensed with, the agent according to the invention is preferably free from dicarboxylic acid (salts).

In addition, one or more other auxiliaries and additives, especially UV stabilizers, perfume, pearlescent agents (INCI Opacifying Agents; for example glycol distearate, e.g. Cutina® AGS from Cognis, or mixtures containing this, e.g. the Euperlane® from Cognis), dyes, corrosion inhibitors, preservatives (for example the technical 2-bromo-2-nitropropane-1,3-diol (CAS 52-51-7), also known as bronopol (CAS 52-51-7), for example as Myacide® BT or as Boots Bronopol BT is commercially available from Boots) or Acticide MBR 1 or Acticide CMB 2, organic salts, disinfectants, pH adjusters and additives that improve or care for the skin (e.g. dermatologically active substances such as vitamin A, vitamin B2, vitamin B12, vitamin C, vitamin E, D panthenol, sericerin, collagen partial hydrolyzate, various vegetable protein partial hydrolyzates, protein hydrolyzate-fatty acid condensate ate, liposomes, cholesterol, vegetable and animal oils such as lecithin, soybean oil, etc., plant extracts such as aloe vera, azulene, witch hazel extracts, algae extracts, etc., allantoin, AHA complexes, glycerol, urea, quaternized hydroxyethyl cellulose), in quantities of usually not more than 8 wt .-%, based on the total weight of the dishwashing detergent.

Na xylene sulfonate can be used as a viscosity regulating additive.

The pH value of the agent according to the invention can be adjusted by means of conventional pH regulators, for example acids such as mineral acids or citric acid and / or alkalis such as sodium or potassium hydroxide, with a range from 4 to 9 - especially if hand tolerance is desired.

To adjust and / or stabilize the pH, the agent according to the invention can contain one or more buffer substances (INCI buffering agents), usually in amounts of 0.001 to 5% by weight, preferably 0.005 to 3% by weight, in particular 0 0.1 to 2% by weight, particularly preferably 0.05 to 1% by weight, extremely preferably 0.1 to 0.5% by weight, for example 0.2% by weight. Preference is given to buffer substances that are also complexing agents or even chelating agents (chelators, INCI chelating agents). Particularly preferred buffer substances are citric acid or the citrates, in particular the sodium and potassium citrates, for example trisodium citrate · 2 H2O and tripotassium citrate · H2O. Table 1 shows the following experimental compositions: V1 E1 E2 100 100 100 % as % active % telq % active % telq % active % telq Water, soft 100 54.98 54.98 54.98 54.98 54.98 54.98 FAEOS-Na C12-14 2EO 70% 70 10.40 14.86 10.40 14.86 10.40 14.86 Amine oxides, C12-C18 alkyldimethyl 30th 2,600 8.67 1,820 6.07 0 0 Amine oxides, C12-C14 alkyldimethyl 30th 0 0 0.780 2.60 2,600 8.67 Na-cumene sulfonate 40 1,000 2.50 1,000 2.50 1,000 2.50 Acticide MBR 1 100 0.100 0.10 0.100 0.10 0.100 0.10 Potassium acetate 70% solution 70 0.140 0.20 0.140 0.20 0.140 0.20 Sodium hydroxide 50% 50 Citric acid solution 50 0.075 0.15 0.075 0.15 0.075 0.15 Protease Novozym HET Ultra 1000 L 100 0.200 0.20 0.200 0.20 0.200 0.20 Amylase Amplify 12 L 100 0.100 0.10 0.100 0.10 0.100 0.10 Magnesium sulfate 100 3,400 3.40 3,400 3.40 3,400 3.40 Water, demineralized 100 14,846 14.85 14,846 14.85 14,846 14.85 Self-fat dissolving power ○ + ++

The self-degreasing power ("self degreasing"), ie the self-releasing removal of fat in particular without additional mechanical action, for example by means of a sponge or a brush, was tested in the above examples to the effect that dishes soiled with fats can be used with the above compositions without additional mechanical action was brought into contact. In particular, the property of dissolving fats from dishes was shown, even without additional mechanical action by a sponge or a brush, preferably by the composition E1 and more preferably by E2. It has thus been shown that a shortening of the amine oxide chain length results in improved self-fat dissolving power.

The foam behavior of the compositions was also tested. It is known that amine oxides are used to stabilize foam. However, conventional commercially available amine oxides do not have a satisfactory foam volume.

For the compositions E2 and V1, the foam volume was determined at 20 ° C and at 30 ° C. The compositions were stirred for 10 seconds to 150 seconds at 2000 rpm and a corresponding characteristic number proportional to the foam volume was determined. Table 2: [sec], 2000 rpm E2, 20 ° C V1, 20 ° C E2, 30 ° C V1, 30 ° C 1.x 10 177 161 163 153 2.x 10 264 242 253 224 3.x 10 355 310 339 292 4.x 10 433 378 420 341 5.x 10 488 435 482 391 6.x 10 518 470 526 427 7.x 10 535 495 555 457 8.x 10 544 509 578 477 9.x 10 552 517 591 492 10.x 10 559 523 614 506 11.x 10 561 523 629 518 12.x 10 562 527 659 529 13.x 10 567 530 673 539 14.x 10 572 531 681 549 15.x 10 573 530 687 558

The results clearly show that the foam formation when using the C12 to C14 amine oxide distribution according to E1 described here is superior to the C12 to C18 amine oxide distribution according to V1.

The following (Table 3) shows examples of C12 to C14 amine oxide chain length distributions: Table 3: Chain length R3 C10 and lower 2% C12 68% C14 25% C16 5% C18 and larger 0%

The following (Table 4) shows examples of C12 to C18 amine oxide chain length distributions: Table 4: Chain length R3 C10 and lower 5% C12 42% C14 23% C16 17% C18 and larger 13%

The above distributions are exemplary. Amine oxide distributions can fluctuate within certain limits.

Claims (10)

Hand dishwashing composition comprising: at least one surfactant, the at least one surfactant being an amine oxide, and where the proportion of amine oxides, which have a C18 or longer residue is less than 10% based on the total weight of the amine oxides in the composition, more preferably less than 3%. The hand dishwashing composition according to claim 1, wherein the proportion of amine oxides having a C16 or greater residue is less than 20%, more preferably less than 10%, based on the total weight of the amine oxides in the composition. Hand dishwashing composition according to claim 1 or 2, wherein the proportion of amine oxides which have a C12 radical is between 50 and 85% based on the total amount of amine oxide, preferably between 60 and 85%. Hand dishwashing composition according to one of the preceding claims, wherein the proportion of amine oxides which have a C14 radical is between 20 and 35% based on the total amount of amine oxide. Hand dishwashing composition according to one of the preceding claims, wherein the proportion of amine oxides which have only C10 or smaller residues is less than 5% based on the total amount of amine oxide. Hand dishwashing composition according to any one of the preceding claims, characterized in that amine oxide is present in a total amount of at least 0.5% by weight based on the total weight of the composition. Hand dishwashing composition according to any one of the preceding claims, characterized in that the surfactant system contains at least one anionic surfactant selected from ether sulfates, alkyl sulfates and mixtures thereof. Hand dishwashing composition according to any one of the preceding claims, characterized in that the anionic surfactant is present in an amount of at least 4% by weight based on the total weight of the composition. Hand dishwashing composition according to any one of the preceding claims, characterized in that the dishwashing composition at least one additional Ingredient selected from the group consisting of water, enzymes, organic solvents, enzymes, additives to improve the drainage and drying behavior, to adjust the viscosity and / or to stabilize, UV stabilizers, perfume, pearlescent agents, dyes, corrosion inhibitors, preservatives, bitter substances , organic salts, disinfectants, structuring polymers, defoamers, encapsulated ingredients, pH adjusters and additives that improve or care for the skin. Use of a composition according to any one of the preceding claims for self-releasing grease removal and / or for increasing the lather volume of the composition.