EP0763591A1 - Aqueous manual dishwashing composition - Google Patents

Abstract

Aq. hand dishwashing detergent contains 40-100 wt.% (w.r.t. the amt. of washing-active substance) of magnesium fatty alcohol ether sulphate of formula R<2>O(CH2CH2O)nSO3Mg. R<1> = 8-18C alkyl or alkenyl; and n = 0.5-1.5. Alkyl- and alkenyl sulphates of formula R<9>O-SO3Z (II) are new. R<9> = 6-22C (pref. 12-18C) alkyl or alkenyl; and Z = an alkali and/or alkaline earth metal, ammonium, alkyl ammonium, alkanol ammonium or glucammonium. Pref. the agents also contain alk(en)yl oligoglucoside surfactants of formula R<2>O-ÄGÜp (II), or betaines of formula R<3>N(R<4>)(R<5>)(CH2)nCOOX (III) or R<6>CO-NH-(CH2)mN(R<4>)(R<5>)(CH2)nCOOX (IV). R<2> = 4-22C alkyl or alkenyl; G = 5-6C sugar gp.; p = 1-10; R<3> = 6-22C alkyl or alkenyl; R<4> = H or 1-4C alkyl; R<5> = 1-4C alkyl; n = 1-6; X = alkali or alkaline earth metal or ammonium; R<6>CO = 6-22C aliphatic acyl with 0 or 1-3 double bonds; and m = 1-3. The agents contain 5-40 wt.% of washing-active substance.

Description

Field of the Invention

The invention relates to aqueous hand dishwashing detergents with improved emulsifying power, containing defined amounts of low-ethoxylated fatty alcohol ether sulfates in the form of their magnesium salts.

State of the art

Hand dishwashing detergents (HGSM) are usually dilute aqueous detergent mixtures which, in addition to anionic surfactants, contain primarily nonionic and amphoteric surfactants. In addition to cleaning the dishes, these agents are required to have a strong and durable foam that does not collapse even when exposed to considerable fat - even if this activation is not directly related to the cleaning performance. However, a particular problem is to emulsify the detached lipophilic skin layer, i.e. to prevent redeposition on the dishes. Products of the state of the art also show deficits here.

A number of hand dishwashing detergents are already known from the prior art, which are formulated with the use of magnesium salts. For example, European Patent Application EP-A 0 616 028 (Procter & Gamble) HGSM based on fatty alcohol ether sulfate sodium salts, plane and magnesium ions are proposed. HGSM are known from the international patent applications WO 92/06156, WO 94/05769 and WO 94/24241 (Procter & Gamble), the combinations of anionic surfactants and Contain glucamides, ether carboxylic acids or secondary alkyl sulfates with magnesium ions. The international patent application WO 94/04644 (Unilever) describes liquid cleaning agents containing fatty alcohol sulfates, nonionic surfactants and magnesium ions. US Pat. Nos. 5,269,974 and 5,338,491 (Procter & Gamble) relate to the use of betaines or glucamides together with magnesium salts in hand dishwashing detergents. Finally, the use of higher ethoxylated fatty alcohol ether sulfate magnesium salts in HGSM is known from British patent application GB-A 20 78 246 (Procter & Gamble). However, all of these steps do not provide a satisfactory solution for improving the emulsifying power of hand dishwashing detergents.

The complex object of the invention was therefore to provide aqueous hand dishwashing detergents which at the same time have good dishwashing power, high base foam, good fat resistance and, in particular, excellent emulsifying power.

Description of the invention

in der R¹ für einen Alkyl- und/oder Alkenylrest mit 8 bis 18 Kohlenstoffatomen und n für Zahlen von 0,5 bis 1,5 steht, in Mengen von 40 bis 100, vorzugsweise 45 bis 90 und insbesondere 45 bis 80 Gew.-% - bezogen auf den Anteil an waschaktiver Substanz.The invention relates to aqueous hand dishwashing detergents containing fatty alcohol ether sulfates of the formula (I),

in which R ^{1 represents} an alkyl and / or alkenyl radical having 8 to 18 carbon atoms and n represents numbers from 0.5 to 1.5, in amounts of 40 to 100, preferably 45 to 90 and in particular 45 to 80 parts by weight. % - based on the proportion of detergent active.

Surprisingly, it was found that low-ethoxylated fatty alcohol ether sulfates in the form of their magnesium salts not only have an excellent dishwashing ability and also have a high base foam when loaded with fat, but also have a particularly advantageous emulsifying ability which allows the lipophilic soiling detached from the dish to be redeposited on the washed Good to avoid safely. However, the condition is that the proportion of the above-mentioned magnesium salts - based on the proportion of detergent, ie surfactant - is above a critical limit. In In a preferred embodiment of the invention, the agents can contain alkyl and / or alkenyl oligoglycosides, betaines and / or fatty alcohol sulfates as further surfactants.

Fatty alcohol ether sulfates

The fatty alcohol sulfates to be used for the purposes of the invention are substances known per se which, by the addition of very little, namely an average of 0.5 to 1.5, preferably about 1 mol, of ethylene oxide to a technical coconut fatty alcohol containing 8 to 18 and preferably 12 up to 14 carbon atoms, sulfation of the polyglycol ether and neutralization with a basic magnesium salt. A recent overview of magnesium salt surfactants is from H.Plate in Parf. Cosm. 76 , 28 (1995) .

Alkyl and / or alkenyl oligoglycosides

in der R² für einen Alkyl- und/oder Alkenylrest mit 4 bis 22 Kohlenstoffatomen, G für einen Zuckerrest mit 5 oder 6 Kohlenstoffatomen und p für Zahlen von 1 bis 10 steht. Sie können nach den einschlägigen Verfahren der präparativen organischen Chemie erhalten werden. Stellvertretend für das umfangreiche Schrifttum sei hier auf die Schritten EP-A1-0 301 298 und WO 90/03977 verwiesen. Die Alkyl- und/oder Alkenyloligoglykoside können sich von Aldosen bzw. Ketosen mit 5 oder 6 Kohlenstoffatomen, vorzugsweise der Glucose ableiten. Die bevorzugten Alkyl- und/oder Alkenyloligoglykoside sind somit Alkyl- und/oder Alkenyloligoglucoside.Alkyl and alkenyl oligoglycosides are known nonionic surfactants which follow the formula (II)

in which R ^{2 is} an alkyl and / or alkenyl radical having 4 to 22 carbon atoms, G is a sugar radical having 5 or 6 carbon atoms and p is a number from 1 to 10. They can be obtained according to the relevant procedures in preparative organic chemistry. As a representative of the extensive literature, reference is made to steps EP-A1-0 301 298 and WO 90/03977 . The alkyl and / or alkenyl oligoglycosides can be derived from aldoses or ketoses with 5 or 6 carbon atoms, preferably glucose. The preferred alkyl and / or alkenyl oligoglycosides are thus alkyl and / or alkenyl oligo glucosides .

The index number p in the general formula (II) indicates the degree of oligomerization (DP degree), ie the distribution of mono- and oligoglycosides, and stands for a number between 1 and 10. While p in a given compound must always be an integer and here can assume the values p = 1 to 6, the value p is one for a certain alkyl oligoglycoside analytically determined arithmetic size, which usually represents a fractional number. Alkyl and / or alkenyl oligoglycosides with an average degree of oligomerization p of 1.1 to 3.0 are preferably used. From an application point of view, those alkyl and / or alkenyl oligoglycosides are preferred whose degree of oligomerization is less than 1.7 and in particular between 1.2 and 1.4.

The alkyl or alkenyl radical R ² can be derived from primary alcohols having 4 to 11, preferably 8 to 10, carbon atoms. Typical examples are butanol, capron alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and their technical mixtures, as are obtained, for example, in the hydrogenation of technical fatty acid methyl esters or in the course of the hydrogenation of aldehydes from Roelen's oxosynthesis. Alkyl oligoglucosides of chain length C ₈ -C ₁₀ (DP = 1 to 3) are preferred, which are obtained as a preliminary step in the separation of technical C ₈ -C ₁₈ coconut fatty alcohol by distillation and with a proportion of less than 6% by weight of C ₁₂ - Alcohol can be contaminated and alkyl oligoglucosides based on technical C _9/11 oxo alcohols (DP = 1 to 3).

The alkyl or alkenyl radical R ² can also be derived from primary alcohols having 12 to 22, preferably 12 to 14, carbon atoms. Typical examples are lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol, erucyl alcohol, brassidyl alcohol and the technical mixtures described above, which can be obtained as described above, and their technical mixtures. Alkyl oligoglucosides based on hardened C _12/14 coconut alcohol with a DP of 1 to 3 are preferred.

Betaine

Betaines are known surfactants which are predominantly produced by carboxyalkylation, preferably carboxymethylation, of aminic compounds. The starting materials are preferably condensed with halocarboxylic acids or their salts, in particular with sodium chloroacetate, one mol of salt being formed per mole of betaine. The addition of unsaturated carboxylic acids such as acrylic acid is also possible. Regarding the nomenclature and in particular the distinction between betaines and "real" amphoteric surfactants, reference is made to U.Ploog's article in Soap- Oil -Fat-Waxes, 198 , 373 (1982) . Further overviews on this topic can be found for example by A. O'Lennick et al. in HAPPI, Nov. 70 (1986), S. Holzman et al. in tens. Det. 23: 309 (1986), R.Bibo et al. in Soap Cosm. Chem. Spec. Apr. 46 (1990) and P.Ellis et al. in Euro Cosm. 1 , 14 (1994) . In addition, reference is made to the German patent application DE-A1 42 34 487 (Henkel), from which hand dishwashing detergents containing alkyl glucosides, betaines and fatty alcohol polyglycol ethers are known.

in der R³ für Alkyl- und/oder Alkenylreste mit 6 bis 22 Kohlenstoffatomen, R⁴ für Was-serstoff oder Alkylreste mit 1 bis 4 Kohlenstoffatomen, R⁵ für Alkylreste mit 1 bis 4 Kohlenstoffatomen, n für Zahlen von 1 bis 6 und X für ein Alkali- und/oder Erdalkalimetall oder Ammonium steht.Examples of suitable betaines are the carboxyalkylation products of secondary and in particular tertiary amines which follow the formula (III)

R ³ for alkyl and / or alkenyl radicals with 6 to 22 carbon atoms, R ⁴ for hydrogen or alkyl radicals with 1 to 4 carbon atoms, R ⁵ for alkyl radicals with 1 to 4 carbon atoms, n for numbers from 1 to 6 and X. represents an alkali and / or alkaline earth metal or ammonium.

Typical examples are the carboxymethylation products of hexylmethylamine, hexyldimethylamine, octyldimethylamine, decyldimethylamine, dodecylmethylamine, dodecyldimethylamine, Dodecylethylmethylamin, C _12/14 -Kokosalkyldimethylamin, Myristyldimethyl-amine, cetyldimethylamine, stearyldimethylamine, stearyl, oleyl, C _16/18 tallow alkyl dimethyl amine and technical mixtures thereof.

in der R⁶CO für einen aliphatischen Acylrest mit 6 bis 22 Kohlenstoffatomen und 0 oder 1 bis 3 Doppelbindungen, m für Zahlen von 1 bis 3 steht und R⁴, R⁵, n und X die oben angegebenen Bedeutungen haben.Also suitable are carboxyalkylation products of amidoamines which follow the formula (IV)

in which R ⁶ CO represents an aliphatic acyl radical having 6 to 22 carbon atoms and 0 or 1 to 3 double bonds, m represents numbers from 1 to 3 and R ⁴ , R ⁵ , n and X have the meanings given above.

Typical examples are reaction products of fatty acids with 6 to 22 carbon atoms, namely caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmoleic acid, stearic acid, isostearic acid, oleic acid, elaldic acid, petroselinic acid, linoleic acid, linolenic acid, elaeostearic acid, gadoleic acid and arachic acid, arachic acid and their technical mixtures, with N, N-dimethylaminoethylamine, N, N-dimethylaminopropylamine, N, N-diethylaminoethylamine and N, N-diethylaminopropylamine, which are condensed with sodium chloroacetate. It is preferred to use a condensation product of C _8/18 coconut fatty acid N, N-dimethylaminopropylamide with sodium chloroacetate.

in der R⁷ für einen Alkylrest mit 5 bis 21 Kohlenstoffatomen, R⁸ für eine Hydroxylgruppe, einen OCOR⁷- oder NHCOR⁷-Rest und m für 2 oder 3 steht. Auch bei diesen Substanzen handelt es sich um bekannte Stoffe, die beispielsweise durch cyclisierende Kondensation von 1 oder 2 Mol Fettsäure mit mehrwertigen Aminen wie beispielsweise Aminoethylethanolamin (AEEA) oder Diethylentriamin erhalten werden können. Die entsprechenden Carboxyalkylierungsprodukte stellen Gemische unterschiedlicher offenkettiger Betaine dar.Furthermore, suitable starting materials for the betaines to be used in accordance with the invention are also imidazolines which follow the formula (V)

in which R ^{7 is} an alkyl radical having 5 to 21 carbon atoms, R ^{8 is} a hydroxyl group, an OCOR ⁷ or NHCOR ⁷ radical and m is 2 or 3. These substances are also known substances, for example by cyclizing condensation of 1 or 2 moles of fatty acid with polyhydric amines such as aminoethylethanolamine (AEEA) or diethylenetriamine can be obtained. The corresponding carboxyalkylation products are mixtures of different open-chain betaines.

Typical examples are condensation products of the above-mentioned fatty acids with AEEA, preferably imidazolines based on lauric acid or again C _12/14 coconut fatty acid, which are subsequently betainized with sodium chloroacetate.

Alkyl and / or alkenyl sulfates

in der R⁹ für einen linearen oder verzweigten, aliphatischen Alkyl- und/oder Alkenylrest mit 6 bis 22, vorzugsweise 12 bis 18 Kohlenstoffatomen und Z für ein Alkali- und/oder Erdalkalimetall, Ammonium, Alkylammonium, Alkanolammonium oder Glucamnonium steht.Alkyl and / or alkenyl sulfates, which are also often referred to as fatty alcohol sulfates, are to be understood as meaning the sulfation products of primary alcohols which follow the formula (VI)

in which R ^{9 is} a linear or branched, aliphatic alkyl and / or alkenyl radical having 6 to 22, preferably 12 to 18 carbon atoms and Z is an alkali and / or alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucamnonium.

Typical examples of alkyl sulfates which can be used for the purposes of the invention are the sulfation products of capron alcohol, caprylic alcohol, capric alcohol, 2-ethylhexyl alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, arachelyl alcohol, aridyl alcohol, elaidyl alcohol, ela-elyl alcohol, ela-alcohol alcohol and erucyl alcohol and their technical mixtures, which are obtained from high pressure hydrogenation of technical methyl ester fractions or aldehydes from Roelen's oxosynthesis. The sulfation products can preferably be used in the form of their alkali metal salts, and in particular their sodium salts. Alkyl sulfates based on C _16/18 tallow fatty alcohols or vegetable fatty alcohols of comparable C chain distribution in the form of their sodium, ammonium and / or magnesium salts are particularly preferred.

Hand dishwashing liquid

• 40 bis 100 (45 bis 80) Gew.-% Kokosfettalkohol+1EO-sulfat-Magpesiumsalz,
• 0 bis 35 (20 bis 30) Gew.-% Alkylsulfate (z.B. Laurylsulfat-Ammoniumsalz),
• 0 bis 15 ( 5 bis 15) Gew.-% Alkylglucoside (z.B. Kokosalkyloligoglucosid) und
• 0 bis 15 ( 5 bis 15) Gew.-% Betaine (z.B. Kokosfettsäureamidobetain).

In a preferred embodiment of the invention, the aqueous hand dishwashing detergents contain the following ingredients:

• 40 to 100 (45 to 80)% by weight coconut fatty alcohol + 1EO sulfate magnesium salt,
• 0 to 35 (20 to 30)% by weight alkyl sulfates (e.g. lauryl sulfate ammonium salt),
• 0 to 15 (5 to 15)% by weight alkyl glucosides (e.g. coconut alkyl oligoglucoside) and
• 0 to 15 (5 to 15)% by weight betaines (e.g. coconut fatty acid amido betaine).

The percentages relate to the proportion of detergent substance and add up to 100% by weight. The preferred ranges are given in brackets. The agents have a water content of preferably 75 to 85% by weight

Industrial applicability

The agents according to the invention usually have a detergent content in the range from 5 to 40 and preferably 15 to 25% by weight. They are characterized by an excellent dishwashing ability, a high base foam, fat resistance and a particularly advantageous emulsifying ability. Furthermore, they can contain common ingredients of dishwashing detergents such as builders (polycarborylates, EDTA, NTA, citric acid), alkalis, solubilizers (ethanol, propylene glycol, toluenesulfonate, cumene sulfonate), colors and fragrances. In addition to the surfactants mentioned, fatty alcohol ether sulfate sodium or ammonium salts, sulfosuccinates, monoglyceride sulfates, fatty alcohol polyglycol ethers, fatty acid N-alkylglucamides, protein hydrolysates, protein fatty acid condensates and / or amine oxides may also be present.

The following examples are intended to explain the subject matter of the invention without restricting it.

Examples

• Die Ermittlung des Tellerspülvermögens wurde mit Hilfe des Tellertestes [Fette, Seifen, Anstrichmitt., 74, 163 (1972)] durchgeführt. Hierzu wurden Teller mit einem Durchmesser von 14 cm mit je 2 g Rindertalg ("RiTa", Säurezahl 9-10) bzw. einer Mischanschmutzung angeschmutzt und 24 h bei Raumtemperatur gelagert. Anschließend wurden die Teller bei 50°C bzw. 45°C mit 5 l Leitungswasser der Härte 16°d gespült. Die Prüfmischung wurde mit einer Dosierung von 0,5 g/l Aktivsubstanz/l eingesetzt. Der Spülversuch wurde abgebrochen, sobald der Schaum an der Oberfläche völlig verschwunden war.
• Die Ermittlung des Schaumvermögens erfolgte gemäß DIN 53 902, Teil 2 gemäß dem Ross-Miles Test. Die Testtemperatur betrug 20°C, die Wasserhärte 16°d und die Aktivsubstanzmenge 25 g/l. Bestimmt wurde der Basisschaum in mi mit und ohne Fettbelastung (Olivenöl).
• Das Emulgiervermögen wurde schließlich bei einer Temperatur von 25°C bei einer Wasserhärte von 16°d bestimmt. Hierzu wurden Emulsionen aus jeweils 10 g der Rezepturen R1 bis R10, 40 ml Wasser und 50 g Olivenöl hergestellt. Angegeben ist die Menge des aus der Emulsion abgeschiedenen Wassers nach 1 bzw. 4 h in %.

Tabelle 1 Rezepturbeispiele und anwendungtechnische Ergebnisse * Zusammensetzung R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 Kokosalkohol+1EO-sulfat-Mg-S. 15,5 10,3 9,00 7,75 6.10 - - - - - Kokosalkoholsulfat-Mg-Salz - - - - - - - - 15,5 5,20 Kokosalkohol+2EO-sulfat.Mg-S. - - - - - 15,5 10,3 7,75 - 10,3 Kokosalkoholsulfat-NH₄-Salz - 5,0 6,1 7,75 9,40 - 5,0 7,75 - - Kokosalkyloligoglucosid 1,75 1,75 1,75 1,75 1,75 1,75 1,75 1,75 1,75 1,75 Kokosfettsäureamidobetain 1,75 1,75 1,75 1,75 1,75 1,75 1,75 1,75 1,75 1,75 Polycarbonsäuresalz 1,25 1,25 1,25 1,25 1,25 1,25 1,25 1,25 1,25 1,25 Natriumhydroxid 0,75 0,75 0,75 0,75 0,75 0,75 0,75 0,75 0,75 0,75 Ethanol 4,00 4,00 4,00 4,00 4,00 4,00 4,00 4,00 4,00 4,00 Wasser, vollentionisiert ad 100 Tellerspülvermögen (Teller) - Rindertalg-Anschmutzung 17 17 17 16 16 15 15 15 15 14 - Mischanschmutzung 38 38 38 33 33 32 33 32 31 32 Schaumvermögen (ml) - ohne Ölbelastung 80 85 90 90 90 90 85 85 80 90 - mit 5 ml Olivenöl/l 45 50 55 55 60 40 45 45 35 55 - mit 10 ml Olivenöl/l 30 35 35 35 35 30 30 30 20 35 Emulgiervermögen (%) - nach 1 h 0 0 0 1 4 5 4 6 3 1 - nach 4 h 7 7 9 13 20 22 21 25 15 10 *) Unter dem Begriff

Kokos

ist hier ein Kettenschnitt C_8/18 zu verstehen The test formulations R1 to R10 represent mixtures of various anionic surfactants (fatty alcohol ether sulfates or fatty alcohol sulfates), nonionic and amphoteric surfactants which contain polycarboxylic acid salts, sodium hydroxide and ethanol as further constituents. The content of wash-active substance was 19% by weight in all cases. The formulas R1 to R3 are according to the invention, the formulas R4 to R10 are used for comparison. The composition of the recipes is summarized in Table 1; all data are understood as% by weight based on 100% by weight of active substance. The following application-specific properties were checked in the course of the investigations (for the results, see also Table 1):

• The determination of the dishwashing power was determined using the plate test [Fette, Seifen, Anstrichmittel Mitt., 74, 163 (1972)] is performed. For this purpose, plates with a diameter of 14 cm were soiled with 2 g of beef tallow ("RiTa", acid number 9-10) or mixed soiling and stored for 24 hours at room temperature. The plates were then rinsed at 50 ° C or 45 ° C with 5 l tap water with a hardness of 16 ° d. The test mixture was used at a dosage of 0.5 g / l active substance / l. The rinsing attempt was stopped as soon as the foam on the surface had completely disappeared.
• The foaming power was determined in accordance with DIN 53 902, part 2 in accordance with the Ross-Miles test. The test temperature was 20 ° C, the water hardness 16 ° d and the amount of active substance 25 g / l. The base foam was determined in mi with and without fat (olive oil).
• The emulsifying power was finally determined at a temperature of 25 ° C and a water hardness of 16 ° d. For this purpose, emulsions were prepared from 10 g of the formulations R1 to R10, 40 ml of water and 50 g of olive oil. The amount of water separated from the emulsion is given in% after 1 or 4 hours.

Table 1 Formulation examples and application results * composition R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 Coconut alcohol + 1EO-sulfate-Mg-S. 15.5 10.3 9.00 7.75 6.10 - - - - - Coconut alcohol sulfate Mg salt - - - - - - - - 15.5 5.20 Coconut alcohol + 2EO-sulfate.Mg-S. - - - - - 15.5 10.3 7.75 - 10.3 Coconut alcohol sulfate NH ₄ salt - 5.0 6.1 7.75 9.40 - 5.0 7.75 - - Coconut alkyl oligoglucoside 1.75 1.75 1.75 1.75 1.75 1.75 1.75 1.75 1.75 1.75 Coconut fatty acid amido betaine 1.75 1.75 1.75 1.75 1.75 1.75 1.75 1.75 1.75 1.75 Polycarboxylic acid salt 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 1.25 Sodium hydroxide 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 0.75 Ethanol 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 4.00 Water, fully deionized ad 100 Dishwashing ability (plate) - Beef tallow soiling 17th 17th 17th 16 16 15 15 15 15 14 - mixed soiling 38 38 38 33 33 32 33 32 31 32 Foaming power (ml) - without oil pollution 80 85 90 90 90 90 85 85 80 90 - with 5 ml olive oil / l 45 50 55 55 60 40 45 45 35 55 - with 10 ml olive oil / l 30th 35 35 35 35 30th 30th 30th 20th 35 Emulsifying power (%) - after 1 h 0 0 0 1 4th 5 4th 6 3rd 1 - after 4 h 7 7 9 13 20th 22 21 25th 15 10th *) Under the term

coconut

a chain cut C _{8/18 is} to be understood here

Discussion of the results. The examples and comparative examples show that optimal emulsifying power with high dishwashing power and satisfactory base foam is only achieved as a anionic surfactant, a coconut oil alcohol + 1EO sulfate magnesium salt in a concentration of 50% by weight and more based on the content of detergent Substance is present on average. Above the critical limit, the recipe tolerates the use of other, otherwise not necessarily advantageous, anionic surfactants, but if the content falls below this level, the emulsifying capacity immediately deteriorates significantly.

Claims (6)

Aqueous hand dishwashing detergent, containing fatty alcohol ether sulfates of the formula (I),

in which R ^{1 represents} an alkyl and / or alkenyl radical having 8 to 18 carbon atoms and n represents numbers from 0.5 to 1.5, in amounts of 40 to 100% by weight, based on the proportion of detergent substance. Agents according to Claim 1, characterized in that they contain alkyl and alkenyl oligoglycosides of the formula (II) as further surfactants,

in which R ^{2 is} an alkyl and / or alkenyl radical having 4 to 22 carbon atoms, G is a sugar radical having 5 or 6 carbon atoms and p is a number from 1 to 10. Agents according to Claims 1 and 2, characterized in that they contain betaines of the formula (III) as further surfactants,

in which R ³ for alkyl and / or alkenyl radicals with 6 to 22 carbon atoms, R ⁴ for hydrogen or alkyl radicals with 1 to 4 carbon atoms, R ⁵ for alkyl radicals with 1 to 4 carbon atoms, n for numbers from 1 to 6 and X for a Alkali and / or alkaline earth metal or ammonium. Agents according to Claims 1 to 3, characterized in that they contain betaines of the formula (IV) as further surfactants,

in which R ⁶ CO represents an aliphatic acyl radical having 6 to 22 carbon atoms and 0 or 1 to 3 double bonds, m represents numbers from 1 to 3 and R ⁴ , R ⁵ , n and X have the meanings given above. Alkyl and / or alkenyl sulfates of the formula (VI) ,

in which R ^{9 represents} a linear or branched, aliphatic alkyl and / or alkenyl radical having 6 to 22, preferably 12 to 18 carbon atoms and Z represents an alkali and / or alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucammonium. Agents according to Claims 1 to 5, characterized in that they have a proportion of detergent substance in the range from 5 to 40% by weight.