WO1999049007A1

WO1999049007A1 - Washing up liquid containing fatty acid oligo alkylene glycol ester sulphates

Info

Publication number: WO1999049007A1
Application number: PCT/EP1999/001697
Authority: WO
Inventors: Christian Block; Berthold Schreck; Hans-Christian Raths
Original assignee: Henkel Kommanditgesellschaft Auf Aktien
Priority date: 1998-03-25
Filing date: 1999-03-16
Publication date: 1999-09-30
Also published as: WO1999049006A1

Abstract

The invention relates to a washing up liquid that is mild on the skin and has fine cleaning properties. The inventive product can be obtained by combining fatty acid oligo alkylene glycol ester sulphates of formula R?1COO(R2O)¿nSO3M, wherein M represents a cation, especially an ammonium ion, and R1CO represents a linear or branched aliphatic saturated or unsaturated acyl radical with 6-22 carbon atoms and R?2 in (R2O)¿n represents an alkyl radical, especially CH2CH2 or CH(CH3)CH2 or CH2CH(CH3), wherein n represents 0.5-5, and (R2O)n represents an (EO)u(PO)v(EO)w-type unit, wherein E represents CH2CH2 and P represents CH(CH3)CH2 or CH2CH(CH3) and 0≤u≤5, 0.1≤v≤5 and 0≤w≤5 in addition to u + w⊃0 and 0.5≤(u + v + w)≤5, with alkyl sulphates and/or alkyl ether sulphates of formula R3O(CH2CH2O)mSO3M', wherein R3 represents a saturated or unsaturated C¿8?-C22-alkyl group, m represents 0-10 and M' represents an alkaline metal cation or an alkaline earth metal cation or an ammonium ion.

Description

"Hand dishwashing liquid with fatty acid oligoalene glycol ester sulfates"

The present invention relates to skin-friendly aqueous hand dishwashing detergents containing fatty acid oligoalkylene glycol ester sulfates in combination with alkyl sulfates and / or alkyl ether sulfates with high cleaning power and good emulsifying power.

Liquid cleaning agents usually consist of aqueous solutions of synthetic anionic and / or nonionic surfactants and conventional additives. They are used particularly for cleaning hard surfaces, for example glass, ceramic materials, plastics, painted and polished surfaces. An important area of application for liquid detergents is the manual winding of eating and cooking utensils. The dishes are usually cleaned in slightly diluted liquors at slightly elevated temperatures of around 35 to 45 ° C. In general, the cleaning power of an agent is judged by the consumer as the better, the stronger and the longer the cleaning liquor foams. When removing, in particular, greasy and oily soiling, they are dispersed or emulsified in the rinsing liquor, the cleaning ability of the liquor being retained by the user the longer, the more stable the emulsion formed. Because of the contact of the hands with the cleaning liquor over a longer period of time, the skin-friendliness of the detergent is also of particular importance when manually washing dishes. For these reasons, the expert makes different considerations when selecting the components and the composition of an agent for the manual cleaning of dishes than with liquid detergents for other hard surfaces. 2

It is well known that fatty alkyl sulfates, i.e. sulfated fatty alcohols with 6 to 22 carbon atoms, preferably 12 to 16 carbon atoms, and so-called fatty alkyl ether sulfates, ie salts of sulfated adducts of about 1 to 10 mol of ethylene oxide with fatty alcohols with 6 to 22, preferably 12 to 16 , Carbon atoms in the aliphatic rest have good foaming and cleaning power. The commercially available manual dishwashing agents are therefore generally aqueous solutions of such alkyl sulfates and / or alkyl ether sulfates in combination with other surfactants, in particular alkylbenzenesulfonates or secondary alkanesulfonates, and also solubilizers, colorants and fragrances. To stabilize the surfactant systems and improve handling for the In addition, users are usually added inorganic and / or organic thickeners to the surfactant solutions.

From the publication Representation and Properties of Fatty Acid Polyglycol Ester Sulphates (K. Engel, W. Ruback Fette, Seifen und Anstrichmi ttel 1986, 88, 20-25) the potentially high skin-friendliness of these compounds is known and dishwashing detergents are known, which are a combination contain the fatty acid oligoethylene glycol ester sulfate coconut fatty acid + 4EO ester sulfate with linear alkylbenzene or paraffin sulfonate in a ratio of 2 to 8. However, their cleaning ability is only on par or even inferior to that of the corresponding agents with a fatty alcohol ether sulfate instead of coconut fatty acid + 4EO ester sulfate.

The object of the present invention was to provide skin-friendly aqueous hand dishwashing detergents which are distinguished by a high cleaning performance and a good emulsifying capacity.

This object was achieved according to the invention by aqueous hand dishwashing detergents based on a surfactant combination of fatty acid oligoalkylene glycol ester sulfates with alkyl sulfates and / or alkyl ether sulfates. The present application therefore relates to aqueous hand dishwashing detergents containing A) fatty acid oligoalkylene glycol ester sulfates of the formula I,

R ¹ COO (R ² 0) _/ , S0 ₃ M (i;

in which M represents a cation, in particular an ammonium ion, and R ^: C0 represents a linear or branched, aliphatic, saturated or unsaturated acyl radical having 6 to 22 carbon atoms and R ² in (R ² ©) ,, represents an alkylene radical, in particular CH ₂ CH ₂ or CH (CH ₃ ) CH ₂ or CH ₂ CH (CH ₃ ), where n then denotes numbers from 0.5 to 5, or (R ² 0) _{n is} a unit of the type (EO) _U (P0) _V (E0) _K represents, where E is CH ₂ CH ₂ and P is CH (CH ₃ ) CH ₂ or CH ₂ CH (CH ₃ ) and 0 <u <5, 0.1 <v <5 and 0 <w ≤ 5 and u + w> 0 and 0.5 <(u + v + w) <5, and B) alkyl sulfates and / or alkyl ether sulfates of the formula II,

R ³ 0 (CH ₂ CH ₂ θ) _m S0 ₃ M '(II)

in which R ^{3 represents} a saturated or unsaturated C ₈ -C ₂ alkyl group, m represents numbers from 0 to 10 and M ^{1 represents} an alkali metal or an alkaline earth metal cation or an ammonium ion.

The hand dishwashing detergents according to the invention are not only distinguished by their pronounced skin friendliness and their particularly high cleaning performance, but also have a very good emulsifying capacity. An increasing proportion of fatty acid oligoalkylene glycol ester sulfate causes an increasing stability of the emulsion, whereby a surprisingly high stability increase can be determined even with a weight ratio A to B of 1 to 1 (see examples). In a preferred embodiment of the invention, the agents accordingly contain fatty acid oligoalkylene glycol ester sulfates and alkyl sulfates / alkyl ether sulfates in a weight ratio A to B of at least 1 to 1. It was completely surprising to find that the hand dishwashing detergents according to the invention based on the surfactant combination of fatty acid oligoalkylene glycol ester sulfates with alkyl sulfates and / or alkyl ether sulfates show a synergistically superior cleaning performance compared to comparable agents with only one of these two surfactant components.

Another advantage of the hand dishwashing detergents according to the invention based on the surfactant combination of fatty acid oligoalkylene glycol ester sulfates with alkyl sulfates and / or alkyl ether sulfates is the possibility of being able to adjust a certain viscosity within a wide range solely by the weight ratio of these two surfactant components without significantly impairing the cleaning performance.

The fatty acid oligoalkylene glycol ester sulfates (FSES) of the formula I contained according to the invention are known compounds which are distinguished by excellent skin compatibility and by sulfation of fatty acid oligoalkylene glycol esters of the formula R ⁱ COO (R ² O) _n H, in which R ¹ , R ² and n or (R ² 0) _{n have} the same meaning as m formula I, are accessible (cf. K. Engel,. Ruback Fette, Seifen und Anstrichmi ttel 1986, 88, 20-25).

As described in the unpublished German patent application P 19736906.5, the sulfation is preferably carried out with sulfur trioxide in a molar ratio of 1 to 1 to 1 to 1.3, in particular 1 to 1.05 to 1 to 1.1, preferably in a falling film reactor Temperatures of at least 5 to 10 ° C. above the melting point of the fatty acid oligoalkylene glycol esters, followed by neutralization of the acidic ester obtained with alkali metal hydroxides, alkaline earth metal hydroxides, ammonia and / or water-soluble organic amines, preferably NaOH, KOH and / or NH ₃ , in the form of their 20 to 50% by weight aqueous solutions, the pH in a range from 5 to 9, preferably 6 to 8, and the temperature being 5

is preferably kept between 10 and 40 ° C, in particular 20 and 35 ° C.

The fatty acid oligoalkylene glycol esters used in the sulfation can be prepared, for example, according to application P 19736906.5 above by basic homogeneously catalyzed addition of ethylene oxide and / or propylene oxide to fatty acids. The use of amines such as alkanolams, preferably monoethanolamine or diethanolamine, in particular triethanolamine, in amounts, based on the amount of fatty acids, of 0.1 to 5% by weight, preferably 0.5 to 1.5% by weight, described there. %, it is now also possible as a catalyst to selectively obtain low-alkoxylated, in particular low-ethoxylated, products with a narrow homolog distribution and a low proportion of by-products. The alkoxylation of the fatty acids with 0.5 to 5, preferably 1 to 2 equivalents, based on the amounts of material, ethylene oxide, propylene oxide or an ethylene oxide / propylene oxide mixture can be carried out in a known manner at temperatures from 80 to 180 ° C., preferably 100 to 120 ° C, under autogenous pressure of 1 to 5 bar, preferably 2 to 3 bar. FSES with conventional as well as preferably with narrowed homolog distribution are suitable according to the invention.

According to the invention, the FSES are sulfates of alkoxylated aliphatic carboxylic acids of the formula R ^ OOH, in which R -'- CO represents an aliphatic, linear or branched acyl radical having 6 to 22, preferably 12 to 18 carbon atoms and 0.1 2 or 3 double bonds. Typical examples are the oligoalkyl ester sulfates of caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmoleic acid, stearic acid, isostearic acid, linoleic acid, linoleic acid, linoleic acid, linoleic acid, linoleic acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, lauric acid, elaic acid acid, and acidic acid, Gadolic acid, behenic acid and erucic acid as well as their technical mixtures, which occur, for example, in the pressure splitting of natural fats and oils. Technical fatty acids with 12 to 18 carbons are preferred. 6

Substance atoms such as coconut, palm, palm kernel or tallow fatty acid.

The FSES according to the invention can contain glycol mono- and glycol disulphates, fatty acid soaps, unsulphated parts and / or inorganic sulphates - to a lesser extent due to production.

According to the invention, the sulfates of the formula I with an average degree of alkoxylation n or (u + v + w) of 0.7 to 3, preferably 0.9 to 2 are preferred. The sulfates of the propoxylated and in particular the ethoxylated carboxylic acids or their ammonium salts, especially those of lauric acid oligoalkylene glycol ester sulfates, most preferably the ammonium salt of lauric acid + IEO ester sulfate. Other cations M according to the invention (formula I) are alkali and alkaline earth metal cations, in particular magnesium cations (Mg ²⁺ ).

In a preferred embodiment of the invention, the hand dishwashing detergent contains 1 to 70% by weight, in particular 3 to 50% by weight, extremely preferably 6 to 30% by weight, of fatty acid oligoalkylene glycol ester sulfates.

Furthermore, the agents according to the invention necessarily contain C ₈ -C ₂₂ alkyl sulfates or C ₈ -C ₂₂ alkyl ether sulfates according to formula II or mixtures thereof, amounts usually based on the composition of 0.1 to 40% by weight, preferably 0.1 to 20% by weight, in particular 0.5 to 12% by weight, most preferably 1 to 8% by weight. The C ₈ -C ₂₂ alkyl ether sulfates are preferred.

These substances are also known chemical compounds which can be obtained by sulfating, optionally ethoxylated, C ₈ -C ₂ alcohols. Also C _B -C ₂₂ alkyl ether sulfates with a narrow homolog distribution (NRE = narow ranks ethoxylates), as described, for example, in international patent application WO 91/05764 and in the overview by DL 7

Smith (J. Am. Oil. Chem. Soc. 1991, 68, 629) can be used.

Typical C ₈ -C ₂₂ alkyl ether sulfates are the sulfation products of adducts of 0.5 to 10 moles of ethylene oxide (conventional or restricted homolog distribution) with 1 mole of caprylic alcohol, capric alcohol, lauryl alcohol, myristyl alcohol, cetyl alcohol, palomoleyl alcohol, stearyl alcohol, oleyl alcohol, elaidyl alcohol , Petroselinyl alcohol, arachyl alcohol, gadoleyl alcohol, behenyl alcohol and erucyl alcohol as well as their technical mixtures or 1 mol of a petrochemical alcohol such as the commercially available Cι ₂ ι ₃ oxo alcohols Neodol 2 or Lial 12'3 ^{® '} . Sulfates of adducts of 1 to 7 moles of ethylene oxide with saturated coconut oil alcohols in the form of their sodium, potassium and / or magnesium salts and ammonium salts, such as monoisopropanolammonium salts, are preferred. For example, alkyl ether sulfates can be used which are derived from corresponding fatty alcohol polyglycol ethers which in turn have been prepared in the presence of calcined or, in particular, hydrophobicized hydrocalcite and therefore have a particularly advantageous narrow homolog distribution.

In a preferred embodiment of the invention, fatty acid oligoalkylene glycol ester sulfate (s) (A) and the sum of alkyl sulfate (s) and alkyl ether sulfate (s) (B) have a weight ratio A to B in the range from 4 to 1 to 1 to 4 , in particular from 3 to 1 to 1 to 3, most preferably from 2 to 1 to 1 to 2.

As further anionic surfactants, the agents according to the invention can be C ₈ -C _2: carboxamide sulfates of the formula R-CO-NH (CH ₂ CH ₂ 0) - S0 ₃ X, in which R is a saturated or unsaturated C ₈ -C ₂₂ alkyl group, j are numbers from 1 to 10 and X is an alkali metal, alkaline earth metal or quaternary ammonium ion. 8th

C ₈ -C ₂₂ carboxylic acid amide ether sulfates are known anionic surfactants which have a pronounced foaming capacity and low sensitivity to hardness (cf. A. Reng Parf. And Kosmetik 1980, 61, 87-97). They can be produced by methods known from the prior art (cf. J. Falbe Surfactants in Consumer Products 1987, Springer Verlag, p. 93 ff.).

Typical examples of C ₈ -C ₂₂ carboxylic acid amide ether sulfates are the sulfated adducts of 1 to 10 moles of ethylene oxide (conventional or restricted homolog distribution) with in each case 1 mole of carboxylic acid realkanolamide, such as, for example, the amide of caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, palmitoleic acid , Stearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolinic acid, arachic acid, gadoleic acid, behenic acid and erucic acid. As is customary in fat chemistry, the fatty acid component of the amides can also be derived from technical fatty acid cuts, such as those that occur in the pressure splitting of natural fats and oils, for example palmol, palm kernel oil, coconut oil, rubol or beef tallow. Preferred feedstocks are the carboxylic acid amide ether sulfates of coconut fatty acid.

The C ₈ -C ₂₂ carboxylic acid amide ether sulfates can be used in the hand dishwashing detergents according to the invention in amounts of 0.01 to 60% by weight, based on the finished agent, preferably 0.1 to 40% by weight, in particular 0.2 to 25% by weight .-%, most preferably 0.5 to 15 wt .-%, may be included.

As further anionic surfactants e.g. N-alkylbenzenesulfonates with 9 to 16 carbon atoms in the alkyl radical, alkanesulfonates with 10 to 20 carbon atoms in the alkyl radical and / or olefin sulfonates with 12 to 16 carbon atoms in the alkyl radical can be present in the surfactant solutions according to the invention.

Soaps, ie alkali or ammonium salts of saturated or unsaturated C ₈ -C ₂₂ fatty acids, are due to their foaming properties. 9

Shafts are preferably not included in the surfactant combinations according to the invention.

The feature “preferably not included” is intended to mean that very small amounts of soap of up to 2% by weight, based on the total composition, can still be tolerated within the meaning of the invention.

The preferred nonionic surfactants are alkyl polyglycosides (APG) of the formula III,

R ⁴ 0 [G] _x (III)

m the R ^{4 is} a linear or branched, saturated or unsaturated alkyl radical having 8 to 22 carbon atoms, [G] is a glycosidically linked sugar radical and x is a number from 1 to 10.

APG are non-ionic surfactants and are known substances that can be obtained using the relevant methods of preparative organic chemistry.

The index number x in the general formula III indicates the degree of oligomerization (DP degree), ie the distribution of mono- and oligoglycosides, and stands for a number between 1 and 10. While x in a given compound must always be an integer and here can assume the values x = 1 to 6 in particular, the value x for a certain alkyl glycoside is an analytically determined arithmetic parameter, which usually represents a fractional number. Alkyl glycosides with an average degree of oligomerization x of 1.1 to 3.0 are preferably used. From an application point of view, those alkyl glycosides are preferred whose degree of oligomerization is less than 1.7 and in particular between 1.2 and 1.6. Glucose and xylose are preferably used as glycosidic sugars. 10

The agents according to the invention preferably contain APG in amounts of 0.1 to 20% by weight, in particular 0.5 to 10% by weight, extremely preferably 1 to 5% by weight, and / or in a ratio to the total amount of anionic surfactant from 1: 8 to 1: 4, in particular 1: 7 to 1: 5.

The alkyl or alkenyl radical R ⁴ (formula III) can be derived from primary alcohols having 8 to 18, preferably 8 to 14, carbon atoms. Typical examples are capronic alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and their technical mixtures, such as those obtained in the course of the hydrogenation of technical fatty acid methyl esters or in the course of the hydrogenation of aldehydes from RoELEN's oxo synthesis.

However, the alkyl or alkenyl radical R ⁴ is preferably derived from lauryl alcohol, myristyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol or oleyl alcohol. Elaidyl alcohol, petroselinyl alcohol, arachidyl alcohol, gadolinyl alcohol, behenyl alcohol, erucyl alcohol and their technical mixtures are also to be mentioned.

Further nonionic surfactants which can be used are C ₈ -C ₁₈ alcohol alkoxylates of the formula R'O— (CH ₂ CH ₂ 0) _α —H, where R 'is a saturated or unsaturated C ₈ -C ₈ alkyl group and i is a number from 1 to 20.

The fatty alcohol alkoxylates are known compounds which can be obtained by alkoxylating the fatty alcohols. The fatty alcohol alkoxylates can be present in the agent according to the invention in an amount of 0.1 to 15% by weight.

As further nonionic surfactants Fettsaurealkanolamide can be used, for example Cιo / 22 Fettsauremonoethanolamid or Appendices ^¬ delay products of 4 to 20, preferably from 4 to 10 moles of C ₂ - ₃ - alkylene oxide, preferably ethylene oxide and Cιo-C ₂ o. preferably Ci ₂ -C ₈ alkanols, but also the addition products of ethylene oxide 11 of propylene glycols, which are known under the name Pluronics ^® , and addition products of 1 to 7 moles of ethylene oxide with 1 to 5 moles of propylene oxide reacted with C ₂ -C ₈ -alkanols. Fatty alkyl amine oxides are also suitable.

Fatty acid N-alkylpolyhydroxyalkylamides can also be used as nonionic surfactants, which are also known substances which are usually obtained by reductive amination of a reducing sugar with ammonia, an alkylamine or an alkanolamine and subsequent acylation with a fatty acid, one Fatty acid alkyl esters or a fatty acid chloride can be obtained. With regard to the processes for their production, reference is made to US Pat. Nos. 1,985,424, 2,016,962 and 2,703,798 and international patent application WO 92/06984. An overview of this topic by H. Kelkenberg can be found in Tens. Surf. Det. 1988, 25, 8. Preferred fatty acid N-alkylpolyhydroxyalkylamides are the fatty acid N-alkylglycamides derived from reducing sugars with 5 or 6 carbon atoms, in particular glucose.

Betaine compounds of the formula IV,

(R ⁵ ) (R ⁶ ) (R ⁷ ) N ⁺ -CH ₂ C00 ^~ (IV)

in which R ⁵ denotes an alkyl radical with 8 to 25, preferably 10 to 21 carbon atoms, optionally interrupted by heteroatoms or heteroatom groups, and R ⁶ and R ⁷ mean identical or different alkyl radicals with 1 to 3 carbon atoms. C ₁ -C ₈ alkyl-dimethylcarboxymethylbetaine and Cn-Cπ-alkylamidopropyldimethylcarboxymethylbetaine are preferred.

The betaine compounds of the formula IV are preferably present in an amount of 0.1 to 14% by weight, in particular 1 to 8% by weight, in the hand dishwashing detergent composition according to the invention. 12

The total surfactant content in the compositions according to the invention is preferably above 15% by weight, based on the total composition, but not above 75% by weight, in particular not above 50% by weight.

The solvents to be added if necessary are preferably low molecular weight alkanols having 1 to 4 carbon atoms in the molecule, in particular ethanol and isopropanol. Other solution mediators, for example for dyes and perfumes, can optionally be, for example, alkanolamines, polyols such as ethylene glycol, propylene glycol, glycerol and alkylbenzenesulfonates having 1 to 3 carbon atoms in the alkyl radical, in particular cumene, toluene and xylene sulfonates.

The pH of the agents according to the invention is preferably between 5 and 9, in particular between 6 and 8, most preferably between 6 and 7. The pH is optionally adjusted by means of conventional pH regulators such as citric acid or sodium hydroxide. For storage stabilization, antimicrobial agents or pH buffers can be added in amounts of up to 10% by weight, based on the active substance content of fatty acid oligoalkylene glycol ester sulfate (s).

The agents according to the invention can contain thickeners, for example urea, sodium chloride, magnesium sulfate or chloride, ammonium chloride or polysaccharides and the like, which can also be used in combination. To adjust the viscosity of the agents, substances such as e.g. Gelatin or casein can be used without impairing the performance of the agents according to the invention. In a preferred embodiment of the invention, however, the agents are free from conventional thickeners.

Examples of preservatives that can be mentioned are sodium benzoate, formaldehyde and sodium sulfite. The agents according to the invention can also contain conventional disinfectants. 13

Finally, the agents according to the invention can contain, as further constituents, perfume, dyes and opacifiers, as well as skin protection components, such as those e.g. are known from the document EP 0 522 756.

In the following, examples of formulations of the agents according to the invention are given, which were obtained by stirring the individual constituents in any order and allowing the mixture to stand until there were no bubbles.

14

Examples

The agents E1 to E5 according to the invention and the comparative agents VI and V2 (composition in% by weight according to Table 1) were produced and their cleaning performance and their emulsifying behavior were investigated. The pH was adjusted between 6.2 and 6.6 with citric acid. Water in Table 1 means water and pH regulator (s).

The surfactant components used were

A lauric acid + lEO estersulfate NH ₄ salt (FSES),

B lauryl ether sulfate sodium salt (AES),

CC ₈₁₄ alkyl polyglucoside (APG) and

D Coconut fatty acid amidopropyl betaine.

Table 1

VI El E2 E3 E4 E5 V2

A 13.8 10.3 9 8 6.9 3.5 -

B - 3.5 4.8 5.8 6.9 10.3 13.8

C 2.3 2.3 2.3 2.3 2.3 2.3 2.3

D 5.0 5.0 5.0 5.0 5.0 5.0 5.0

Ethanol 5.0 5.0 5.0 5.0 5.0 5.0 5.0

Water adlOO adlOO adlOO adlOO adlOO adlOO adlOO

A: B

1: 0 3: 1 1.9: 1 1.4: 1 1: 1 1: 3 0: 1

Determination of the cleaning power of fatty acid oligoalkylene glycol ester sulfate and alkyl ether sulfate containing surfactant solutions

The cleaning ability of the aqueous surfactant compositions E1 to E5 as well as VI and V2 was tested in a mechanized plate test on beef tallow soil (c = 0.15 g / 1) and on mixed soil (c = 0.12 g / 1). As a standard (cleaning capacity = 100%) the cleaning capacity of mixture V2 was 15 sets. The percentage cleaning power obtained with respect to the V2 standard is shown in Table 2.

Table 2

VI El E2 E3 E4 E5 V2

Beef tallow soiling 93 114 121 114 121 100 100 Mixed soiling

87 116 121 126 124 108 100

The rinse power of the compositions E1 to E5, which contain components A and B, is synergistically superior to that of comparison agents VI and V2, which contain only one of these two components.

Determination of the emulsifying power of fatty acid oligoalkylene glycol ester sulfate and alkyl ether sulfate-containing surfactant solutions

The emulsifying power of the aqueous surfactant compositions E1 to E5 and VI and V2 was determined by adding 25 ml of olive oil to 25 ml of surfactant solution, stirring the mixture for 30 s and transferring 50 ml of the emulsion obtained to a 50 ml measuring cylinder. The volume of the separated aqueous phase was then determined after 1 h and after 4 h. The results obtained are shown in Table 3 in ml of aqueous phase.

Table 3

VI El E2 E3 E4 E5 V2 l h l 2 3 3 3 7 8 4 h 5 8 11 10 11 25 29

The emulsion is the most stable in the case of the AES-free composition VI, but the most stable for the FSES-free composition V2. 16

least persistent. An increasing proportion of FSES results in an increasing stability, whereby a significant increase in stability can already be seen with a quantity ratio FSES to AES (A: B) of 1 to 1 (E4).

Determination of the viscosity of fatty acid oligoalkylene glycol ester sulfate and alkyl ether sulfate-containing surfactant solutions

The viscosity of the aqueous surfactant compositions E1 to E5 and VI and V2 was determined using a ßroo ^ jield LV viscometer of the type LVDV-II + in a Brookfield Small Sample Adapter (measuring tube for sample volumes from 2 to 16 ml), the spindle and speed in each case were chosen so that the measured viscosity was within the recommended measuring range. The measuring time was 2 minutes at 20 ° C and a rotation frequency of 30 revolutions per minute. The type numbers of the spindles used and the viscosities η obtained are shown in Table 4.

Table 4

VI El E2 E3 E4 E5 VI

Spindle 25 30 30 30 30 25 30

η [mPa-s] 3632 160 260 320 598 6016 880

With a consistently good cleaning capacity from E1 to E5, the viscosity can be set between 100 and 126% (Table 2) in a very wide range from 160 to 6016 mPa * s. Viscosities that are significantly lower than those of solution V2 without fatty acid oligoalkylene glycol ester sulfate (E1 to E4) can be set here, as well as one that is significantly greater than that of solution VI without alkyl ether sulfate (E5).

Claims

17 Pa s claims

1. Aqueous hand dishwashing detergent, characterized in that it

A) fatty acid oligoalkylene glycol ester sulfates of the formula I,

R ¹ C00 (R ² 0) _n S0 ₃ M (I)

in which M stands for a cation, in particular an ammonium ion, and R ^ O for a linear or branched, aliphatic, saturated or unsaturated acyl radical having 6 to 22 carbon atoms and R ² in (R ² 0) for an alkylene radical, in particular CH ₂ CH ₂ or CH (CH ₃ ) CH ₂ or CH ₂ CH (CH ₃ ), where n is then from 0.5 to 5, or (R ² 0) _{n is} a unit of the type (EO) _u (PO) _{v represents} (EO) _w , where E is CH ₂ CH ₂ and P is CH (CH ₃ ) CH ₂ or CH ₂ CH (CH ₃ ) and 0 <u <5, 0, 1 <v < 5 and 0 <w ≤ 5 and u + w> 0 and 0, 5 ≤ (u + v + w) ≤ 5, and

B) alkyl sulfates and / or alkyl ether sulfates of the formula II,

R ³ O ι CH ₂ CH ₂ 0) _m S0 ₃ M '(II)

in which R ^{3 represents} a saturated or unsaturated C ₈ -C ₂ alkyl group, m represents numbers from 0 to 10 and M 'represents an alkali or an alkaline earth metal cation or an ammonium ion,

included.

2. Composition according to claim 1, characterized in that it contains ethoxylated fatty acid oligoalkylene glycol ester sulfates.

3. Composition according to one of claims 1 or 2, characterized in that it contains fatty acid oligoalkylene glycol ester sulfates of the formula I with an average degree of alkoxylation n or

(u + v + w) from 0.7 to 3, preferably 0.9 to 2. 18th

4. Composition according to one of claims 1 to 3, characterized in that it contains fatty acid oligoalkylene glycol ester sulfates (A) and the sum of alkyl sulfates and alkyl ether sulfates (B) in a weight ratio A to B of at least 1 to 1.

5. Composition according to one of claims 1 to 3, characterized in that it contains fatty acid oligoalkylene glycol ester sulfates (A) and the sum of alkyl sulfates and alkyl ether sulfates (B) in a weight ratio A to B in the range from 4 to 1 to 1 to 4, preferably 3 to 1 to 1 to 3, in particular 2 to 1 to 1 to 2, contains.

6. Composition according to one of claims 1 to 5, characterized in that it contains the fatty acid oligoalkylene glycol ester sulfates in amounts of 1 to 70 wt .-%, preferably 3 to 50 wt .-%, in particular 6 to 30 wt .-%.

7. Composition according to one of claims 1 to 6, characterized in that there are alkyl sulfates and / or alkyl ether sulfates in amounts of 0.1 to 40 wt .-%, preferably 0.1 to 20 wt .-%, in particular 0.5 to Contains 12 wt .-%, most preferably 1 to 8 wt .-%.

8. Composition according to one of claims 1 to 7, characterized in that it contains only alkyl ether sulfates as component B.

9. Composition according to one of claims 1 to 8, characterized in that it additionally contains alkyl polyglycosides of the formula III,

R0 [G] _* (III)

in R ⁴ for a linear or branched, saturated or unsaturated alkyl radical with 8 to 22 carbon atoms, [G] for a glycosidically linked sugar radical and x for a 19

Numbers from 1 to 10, preferably 1.1 to 3, in particular 1.2 to 1.6, are extremely preferred, preferably in amounts of 0.1 to 20% by weight, in particular 0.5 to 10% by weight 1 to 5% by weight, and / or in a ratio of 1: 8 to 1: 4, in particular 1: 7 to 1: 5, to the total amount of anionic surfactant.

10.Means according to one of claims 1 to 9, characterized in that there are additionally betaine compounds of the formula IV,

(R ⁵ ) (R ⁶ ) (R ⁷ ) N-CH ₂ C00 ^~ (IV)

in which R ⁵ is optionally substituted by heteroatoms or heteroatom groups interrupted alkyl radical having 8 to 25, preferably 10 to 21 carbon atoms and R ⁶ and R ^{^} are identical or different alkyl radicals having 1 to 3 carbon atoms, preferably in amounts of 0.1 to 14 % By weight, in particular 1 to 8% by weight, contains.

11. Agent according to one of claims 1 to 10, characterized in that it additionally contains solvents, preferably low molecular weight alkanols having 1 to 4 carbon atoms, in particular ethanol.

12.Means according to one of claims 1 to 11, characterized in that it is free of conventional thickeners.