WO2001010998A1 - Synthetic detergent soaps - Google Patents

Abstract

Disclosed are new detergent soaps, containing alkylated carboxylic acids as surfactants, and starch and/or cellulose as builders. The products are characterised by the fact that they especially contain rich, creamy foam and have an optimized skin sensation.

Description

syndet soaps

The invention relates to fatty acid-free syndet soaps containing alkoxylated carboxylic acids and starches

State of the art

Stucco soaps play a major role in body cleansing, which are now produced on an industrial scale by continuous saponification of free fatty acids with alkalis, concentrates of basic soaps and spray drying. A distinction is made between real alkali soaps that contain only fatty acid salts and possibly free fatty acids and so-called "combibars", Stucco soaps, which in addition to fatty acid salts also contain other synthetic surfactants, usually fatty alcohol suifates, fatty acid icethionates or sulfosuccionates. The so-called "syndetbars", on the other hand, have a special status. They are free of fatty acid salts except for impurities and contain only synthetic surfactants

In Germany alone, several million pieces of soap are sold annually for personal hygiene. However, the demands of the market for this mass consumer item are becoming ever higher. Soap bars not only have to clean the skin, they also have to take care of it, i.e. Prevent drying out, greasing and providing protection against external influences. Of course, it is expected that the soap is particularly kind to the skin, but in use it should nevertheless produce as much and creamy foam as possible and cause a pleasant feeling on the skin Stucco soaps are constantly on the lookout for new ingredients that meet this increased requirement profile

However, the soap sticks obtainable according to the teaching of the prior art do not always develop a sufficient amount of foam, and also foam consistency and, in particular, the feeling on the skin can be desired. If free fatty acids are used as releasing agents, corrosion problems can also arise in the production plants The object of the invention was then to provide syndet soaps which are free from the disadvantages described. In particular, it had to be taken into account that new stucco soap compositions must also be able to be produced on an industrial scale, ie that the compositions have, for example, sufficient but not too high deformability possess and do not tend to crack during drying

Description of the invention

The invention relates to syndet soaps containing

(a) alkoxylated carboxylic acid esters of the formula (I),

in which R ¹ CO stands for an aliphatic acyl radical having 6 to 30 C atoms, AlkO for alkylene oxide, n for numbers from 1 to 30 and R ² for an aliphatic alkyl radical with 1 to 8 carbon atoms, and

(b) Strong and / or cellulose

Surprisingly, it was found that stucco soaps with improved foam capacity and optimized skin feel can be produced in the absence of fatty acids or fatty acid salts if alkoxylated carboxylic acids are used as the main surfactant component, preferably in anhydrous form, and strong starch is used. The invention includes the knowledge that the mixtures are also outstandingly suitable for the large-scale production of syndet soaps, ie they are stable when stored in the air, are not hygrospopical, deformable, but not too hard, and do not show any cracking during drying. In a further preferred embodiment of the invention, mixtures of alkoxylated carboxylic acids with alkyl and / or alkynyl loogoglycosides, fatty acid N-alkylpolyhydroxyalkylamides, monoglycid (ether) sulfates, betaines, oleofinsulfonates, fatty acid polyglycol ester sulfates, sulfosuccinates, alkyl sulfates, alkyl sulfoacetates, iso hionates and the like used

Alkoxylated carboxylic acid esters

Alkoxylated carboxylic acid esters which form component (a) are known from the prior art. For example, such alkoxylated carboxylic acid esters can be obtained by etherification of al carboxylated carboxylic acids accessible with alcohols. For the purposes of the present invention, however, the compounds are preferably prepared by reacting carboxylic acid esters with alkylene oxides using catalysts, in particular using calcined hydrotalcite according to German Offenlegungsschrift DE 3914131 A, which provide compounds with a restricted homolog distribution. Both carboxylic acid esters of monohydric alcohols and polyhydric alcohols can be alkoxylated by this process. According to the present invention, alkoxylated carboxylic acid esters of the formula (I) are preferably used

in which R ¹ CO stands for an aliphatic acyl radical with 6 to 30 C atoms, AlkO for alkylene oxide, n for numbers from 1 to 30 and R ² for an aliphatic alkyl radical with 1 to 8 carbon atoms. AlkO stands for the alkylene oxides which are reacted with the carboxylic acid esters and include ethylene oxide, propylene oxide and / or butylene oxide, preferably ethylene oxide and / or propylene oxide, in particular ethylene oxide alone.

Particularly suitable are alkoxylated carboxylic acid esters of the formula (I) in which R ¹ CO is a linear or branched, saturated or unsaturated acyl radical having 6 to 22 and in particular 10 to 18 carbon atoms, AlkO for ethylene oxide and / or propylene oxide, n on average for numbers 5 to 20 and R ^{2 is} an aliphatic alkyl radical having 1 to 8, preferably 1 to 4 carbon atoms and in particular methyl.

Preferred acyl radicals are derived from carboxylic acids having 6 to 22 carbon atoms of natural or synthetic origin, in particular from linear, saturated and / or unsaturated fatty acids, including technical mixtures thereof, as are obtainable by fat cleavage from animal and / or vegetable fats and oils, for example from coconut oil, palm kernel oil, palm oil, soybean oil, sunflower oil, rape oil, cottonseed oil, fish oil, beef tallow and lard. Examples of such carboxylic acids are caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotridecanoic acid, myristic acid, palmitic acid, palmitoleic acid, stearic acid, isostearic acid, oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, elaeostearic acid, arachidic acid, gadoleic acid, behenic acid and / or erucic acid.

Particularly suitable are alkoxylated carboxylic acid esters of the formula (I) in which R ¹ CO is a linear or branched, aliphatic, saturated and / or unsaturated acyl radical having 10 to 18 carbon atoms, AlkO for ethylene oxide and / or propylene oxide, preferably ethylene oxide, n for numbers from 5 to 20 and R ^{2 represents} a methyl radical. Examples of such compounds are methyl lauric acid, methyl coconut fatty acid and methyl tallow fatty acid alkoxylated with an average of 5, 7, 9 or 11 moles of ethylene oxide. Starch and / or cellulose

It is particularly preferred to use wheat and / or corn starch which is untreated or in open, i.e. partially hydrolyzed or acid-built form can be used. Untreated starch has the advantage that it is present in the bar soaps in the form of small, solid grains which, when used, have a gentle abrasive effect and improve the feeling on the skin. Hydrolyzed starch leads to products with better deformability and homogeneity. In a special embodiment of the invention, compounds are prepared from alkoxylated carboxylic acids and starch by subjecting aqueous slurries of the two components to drying with superheated steam. However, it is also possible to carry out the drying, if appropriate together with other surfactants, by another process, for example in a horizontally arranged thin-film evaporator (“flash dryer”).

Alkyl and / or alkenyl olefin glycosides

Alkyl and alkenyl oligoglycosides, which may be included as optional surfactants, are known nonionic surfactants which follow the formula (II)

in which R ^{3 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 representative of the extensive literature, reference is made here to the documents EP 0301298 A1 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 alkenyioligoglucosides. The index number p in the general formula (II) indicates the degree of oligomerization (DP), 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 especially here can assume the values p = 1 to 6, the value p for a certain alkyl oligoglycoside is an analytically determined arithmetic quantity, 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, preference is given to those alkyl and / or alkenyl oligoglycosides whose degree of oligomerization is less than 1.7 and in particular between 1.2 and 1.4. The alkyl or alkenyl radical R ³ can be derived from primary alcohols having 4 to 11, preferably 8 to 10, carbon atoms. Typical examples are butanol, capronic alcohol, caprylic alcohol, capric alcohol and undecyl alcohol and their technical mixtures, such as, for example can be obtained 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 the chain length Cβ-Cio (DP = 1 to 3) are preferred, which are obtained as a preliminary step in the separation of technical C ₈ - Ciβ-coconut fatty alcohol by distillation and can be contaminated with a proportion of less than 6% by weight of Ci2-alcohol and alkyl oligoglucosides based on technical Cg / n oxo alcohols (DP = 1 to 3). The alkyl or alkenyl radical R ³ can also be derived from primary alcohols having 12 to 22, preferably 12 to 14 carbon atoms. Typical examples are lauryl alcohol, mystyl alcohol, cetyl alcohol, palmoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, petroselinyl alcohol, gadachyl alcohol, arachyl alcohol Behenyl alcohol, erucyial alcohol, brassidyl alcohol and their technical mixtures, which can be obtained as described above. Alkyl oligoglucosides based on hardened Ci _∑ m coconut alcohol with a DP of 1 to 3 are preferred.

Fatty acid-N-alkvIpolyhvdroxyalkvIamide

Fatty acid N-alkylpolyhydroxyalkylamides, which may also be included as optional surfactants, are nonionic surfactants which follow the formula (III)

R ⁴

R ⁵ CO-N- [Z] (III)

in the R ⁵ CO for an aliphatic acyl radical with 6 to 22 carbon atoms, R ⁴ for an alkyl or hydroxyalkyl radical with 1 to 4 carbon atoms and [Z] for a linear or branched polyhydroxyalkyl radical with 3 to 12 carbon atoms and 3 to 10 hydroxyl groups stands. The fatty acid N-alkyl polyhydroxyalkylamides are known substances which can usually be obtained by reductive amination of a reducing sugar with ammonia, an alkylamine or an alkanolamine and subsequent acylation with a fatty acid, a fatty acid alkyl ester or a fatty acid chloride. 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.Deterg. 25, 8 (1988). The fatty acid N-alkylpolyhydroxyalkylamides are preferably derived from reducing sugars having 5 or 6 carbon atoms, in particular from glucose. The preferred fatty acid N-alkyl polyhydroxyalkylamides are therefore fatty acid N-alkylglucamides, as represented by the formula (IV):

R ⁴ OH OH OH

I I I I

R ⁵ CO-N-CH ₂ .CH-CH-CH-CH-CH ₂ OH (IV)

I OH Preferably used as fatty acid-N-alkylpolyhydroxyalkylamides are glucamides of the formula (IV) in which R ^{4 is} methyl and R ⁵ CO is the acyl radical of caproic acid, caprylic acid, capric acid, lauric acid, mypic acid palmitic acid, palmoleic acid, stearic acid, stearic acid, stearic acid, Oleic acid, elaidic acid, petroselinic acid, linoleic acid, linolenic acid, arachic acid, gadolinic acid, behenic acid or erucic acid or their technical mixtures are particularly preferred. Fatty acid N-alkylglucamides of the formula (IV) which are obtained by reductive amination of glucose with methylamine and subsequent acylation Lauπnsaure or Ci2 / i4-coconut fatty acid or a corresponding Deπvat can be obtained. Furthermore, the polyhydroxyalkylamides can also be derived from maltose and palatinose

Monoqlyceπd (ether) sulfates

Monoglycid suifates and monoglycid ether sulfates, which may also be present as further anionic surfactants, are known substances which can be obtained by the relevant methods of preparative organic chemistry. The preparation of Tπglycidens is usually used, which, if appropriate, after ethoxylation to give the monoglycends are transesterified and subsequently sulfated and neutralized. It is also possible to convert the partial glycides with suitable sulfating agents, preferably gaseous sulfur trioxide or chlorosulfonic acid [cf. EP 0561825 B1, EP 0561999 B1 (Henkel)]. If desired, the neutralized substances can be subjected to ultrafiltration in order to reduce the electrolyte content to a desired level [DE 4204700 A1 (Henkel)]. Overviews of the chemistry of the monoglycid sulfates are described, for example, by AK Biswas et al in J.Am.Oil.Chem.Soc. 37, 171 (1960) and F U Ahmed J.Am.Oil.Chem. Soc. 67, 8 (1990) appeared. The monoglycid (ether) sulfates to be used in the sense of the invention follow the formula (V),

in which R ⁶ CO stands for a linear or branched acyl radical with 6 to 22 carbon atoms, x, y and z in total for 0 or for numbers from 1 to 30, preferably 2 to 10, and X for an alkali or alkaline earth metal. Typical examples Monoglycid (ether) sulfates suitable for the purposes of the invention are the reaction products of launic acid monoglycid, coconut fatty acid monoglycid, palmitic acid monoglycidic, stearic acid monoglycid, olsauremonoglycidic and tallow fatty acid trinulfide trioxide with their ethylene sulfoxide adduct and their sulfur sulfoxide trioxide with their ethylene sulfoxide adduct and their sulfur sulfoxide trichloride with their ethylene sulfoxide trioxide and their sulfur sulfoxide trioxide with their ethylene sulfoxide trioxide and their sulfur sulfoxide trioxide with their ethylene sulfoxide adduct and their sulfur sulfoxide trioxide with their ethylene sulfoxide trioxide and their sulfur sulfoxide trioxide with their ethylene sulfoxide trioxide and their sulfur sulfoxide trioxide formate. Monoglycid sulfates of the formula (V) are preferably used in which R ⁶ CO for a linear acyl The remainder has 8 to 18 carbon atoms. The monoglycid (ether) sulfates are preferably used as dry granules or powders which can be obtained, for example, by drying aqueous pastes in a flash dryer

Betaine

Betaines, which can also be used as representatives of the amphoteric or zwitteπonic surfactants, are known substances which are predominantly prepared by carboxyalkylation, preferably carboxymethylation, of ammic compounds. The starting materials are preferably condensed with halocarboxylic acids or their salts, in particular with sodium chloroacetate, with per mol Betaine forms a mole of salt. The addition of unsaturated carboxylic acids, such as acrylic acid, is also possible. For the nomenclature and, in particular, to distinguish betaine and "real" amphoteric surfactants, refer to U Ploog's contribution 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.Surf. Det. 23, 309 (1986), R Bilbo et al in Soap Cosm. Chem. Spec, Apr. 46 (1990) and P Ellis et al in Euro Cosm. 1, 14 (1994) Examples of suitable betaines are the carboxyalkylation products of secondary and in particular tertiary amines which follow the formula (VI),

R ⁸

I

R7-N- (CH ₂ ) _q COOX (VI)

I

R9

R ⁷ for alkyl and / or alkenyl radicals with 6 to 22 carbon atoms, R ⁸ for hydrogen or alkyl radicals with 1 to 4 carbon atoms, R ⁹ for alkyl radicals with 1 to 4 carbon atoms, q for numbers from 1 to 6 and X. an alkali metal and / or alkaline earth metal or ammonium Typical examples are the carboxymethylation products of hexylmethylamine, hexyldimethylamine, octyldimethylamine, methylamine Decyidi-, dodecylmethylamine, dodecyldimethylamine, Dodecylethylmethylamin, Ci2 / i4-Kokosalkyldι- methylamine, Mynstyldimethylamin, cetyldimethylamine, stearyldimethylamine, Stearylethylmethylamm, oleyldimethylamine , Ci6 / 18-tallow alkydimethylamine and their technical mixtures. Also suitable are carboxyalkylation products of amidoamines which follow the formula (VII),

R "

IR ° CO-NH- (CH ₂ ) _m -N- (CH2) qCOOX (VII)

I

R9 in which R ¹⁰ 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 ⁸ , R ⁹ q and X have the meanings given above. Typical examples are reaction products of fatty acids oleic acid having 6 to 22 carbon atoms, including caproic, caprylic acid Capπnsaure, Lauπnsaure, Myπstinsaure, palmitic acid, palm, Steaππsaure, Isosteaπnsaure oleic acid, elaidic acid, petroselinic acid, ünolsaure linolenic acid, Elaeosteaπnsaure, arachic Gadoleinsaure, behenic acid and erucic acid and technical mixtures thereof, with N, N-Dιmethylamιnoethylamιn, N, N-Dιmethylamιnopropylamιn, N, N-Dιethylaminoethylamine and N, N-Dιethylamιnopropylamιn, which are condensed with sodium chloroacetate. It is preferred to use a condensation product of Cβ / is-coconut fatty amine amine amine amine amine Natπumchloracetat

Fettsaurepolyqlycolestersulfate

Fatty acid polyglycol ester sulfates which may be present as an optional component preferably follow the formula (I),

in which R ^{1 is} C0 for a linear or branched, saturated or unsaturated acyl radical having 6 to 22 carbon atoms, w for numbers of 1 to 3 on average and AO for a CH2CH2O-, CH ₂ CH (CH ₃ ) 0- and / or CH ( CH ₃ ) CH ₂ 0 radical and X represents an alkali and / or alkaline earth metal, ammonium, alkylammonium, alkanolammonium or glucammonium, are known anionic surfactants and are prepared by sulfation of the corresponding fatty acid polyglycol esters. These in turn are according to the relevant preparative methods of Organic chemistry available For this purpose, ethylene oxide, propylene oxide or a mixture thereof - in random or block distribution - is added to the corresponding fatty acids, this reaction being acid-catalyzed, but preferably in the presence of bases, such as, for example, sodium methylate or calcined hydrotalcite, a degree of alkoxylation of 1 desired, the intermediates can also by esterifying the fatty acids with a corresponding The alkylene glycol can be prepared. The sulfation of the fatty acid polyglycol esters can be carried out in a manner known per se with chlorosulfonic acid or preferably gaseous sulfur trioxide, the molar ratio between fatty acid polyglycol ester and sulfating agent being in the range from 1 0.95 to 1 1, 2, preferably 1 1 to 1 1, 1 and the reaction temperature can be 30 to 80 and preferably 50 to 60 ° C. It is also possible to undersulfate the fatty acid polyglycol esters, ie to use significantly less sulfating agents than would be required for a complete stoichiometric reaction. For example, if molar amounts of fatty acid polyglycol ester are used as sulfating agents from 1 0.5 to 1 0.95 mixtures of fatty acid polyglycol ester sulfates and fatty acid polyglycol esters obtained for a whole series of applications are also advantageous. In order to avoid hydrolysis, it is very important to carry out the neutralization at a pH in the range from 5 to 9, preferably 7 to 8. Typical examples of suitable starting materials are the addition products from 1 to 3 Moles of ethylene oxide and / or propylene oxide, but preferably the adducts with 1 mole of ethylene oxide or 1 mole of propylene oxide with caproic acid, caprylic acid, 2-ethylhexanoic acid, capric acid, lauric acid, isotine decanoic acid, mypine acid, palmitic acid, palmoleic acid steanic acid, oleanic acid, isostolic acid, isostene acid , Linolenic acid, Elaeosteaπnsaure, Arachinsaure, Gadoleinsaure, Behensaure and Erucasaure as well as their technical mixtures, which are then sulfated and neutralized as described above. Preferably fatty acid polyglycol ester sulfates of formula (I) are used, in which R ¹ CO for an acyl residue with 12 to 18 carbon atoms, x for an average of 1 o the 2, AO represents a CH∑CH∑O group and X represents sodium or ammonium, such as, for example, lauric acid + 1 EO-sulfate-sodium salt, lauric acid + 1 EO-sulfate-ammonium salt, coconut fatty acid + 1EO-sulfate-sodium salt, coconut fatty acid +1 EO sulfate ammonium salt, tallow fatty acid + 1 EO sulfate sodium salt, tallow fatty acid + I EO sulfate ammonium salt and mixtures thereof

olefin

The stucco soaps according to the invention can contain, as an optional component, olefin sulfonates, which are usually obtained by addition of SO ₃ to olefins of the formula (III)

R ² -CH = CH-R ¹³ (III)

where R ² and R ¹³ independently of one another represent H or alkyl radicals having 1 to 20 carbon atoms, with the proviso that R ¹² and R ¹³ together have at least 6 and preferably 10 to 16 carbon atoms With regard to preparation and use, reference is made to the review article J.Am .Oil. Soc. 55, 70 (1978)

Internal olefin sulfonates, but preferably α-olefin sulfonates, can be used, which result when R ¹² or R ¹³ stand for hydrogen. Typical examples of olefin sulfonates used are the sulfonation products which are obtained by treating SO3 with 1, 2-butene, 1 -, 2-, 3-hexene, 1-, 2-, 3-, 4-octene, 1-, 2-, 3-, 4-, 5-decene, 1-, 2-, 3-, 4-, 5-, 6- dodecene, 1-, 2-, 3-, 4-, 5-, 6-, 7-tetradecene, 1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-hexadecene, 1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-, 9-octadecene, 1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-, 9-, 10-eιcosen and 1-, 2-, 3-, 4-, 5-, 6-, 7-, 8-, 9-, 10- and 11-docosen reacted after sulfonia Neutralization is carried out, after which the olefin sulfonate is present in the mixture as alkali, alkaline earth, ammonium, alkylammonium, alkanolammomum, glucammonium, preferably sodium salt. Both olefin sulfonates in aqueous paste, preferably at a pH Value from 7 to 10, as well as water-free products, preferably e used as granules, such as they are obtained by conventional spray drying, drying in the thin layer ("flash dryer") DE 19710152 C1 (Henkel) or in a fluidized bed dryer ("sket system")

surfactants

The syndet soaps according to the invention can contain non-ionic, anionic, cationic and / or amphoteric or amphoteric surfactants as further optional surfactant additives. Typical examples of anionic surfactants are soaps, alkyl benzene sulfonates, alkane sulfonates, alkyl ether sulfonates, glycerol ether sulfonates, α-methyl sulfonate sulfonates, α-methyl sulfonate sulfonates , Fatty alcohol ether sulfates, glycine ether sulfates, fatty acid ether sulfates, hydroxy mixed ether sulfates fatty acid amid (ether) sulfates, mono- and dialkyl sulfosuccinates, mono- and dialkyl sulfosuccinamates, sulphotylglycerols, amide soaps, ether carboxylic acids, fatty acids, ethanoic acid fatty acids, ethanoic acid acids, and their salts, ethanoic acid aminates, ethanoic acids, their salts, ethanoic acid acids, their salts, acetic acid, Acyl lactylates, acyl tartrates, acyl glutamates and acyl aspartates, alkyl oligoglucoside sulfates, protein fatty acid condensates (especially vegetable products based on wheat) and alkyl (ether) phosphates, provided the anionic surfactants are polyglycol ether chains included, these may have a conventional, but preferably a narrow-range homolog distribution having Typical examples of nonionic surfactants are fatty alcohol polyglycol ethers, alkylphenol polyglycol ethers, Fettsaurepolyglycolester, Fettsaureamidpolyglycolether, Fettaminpolygly- polyglycol ethers, derivatives alkoxy erte Tπglyceπde, mixed ethers or mixed formals, optionally Glucoronsauredeπ-, fatty acid-N-alkyl, Protein hydrolysates (especially vegetable products based on wheat), polyol fatty acid esters, sugar esters, sorbitan esters, polysorbates and amine oxides. If the nonionic surfactants contain polyglycol ether chains, they can have a conventional, but preferably a narrow, homolog distribution. Typical examples of cationic surfactants are quaternary ammonium compounds, such as for example the dimethyldistearylammonium chloride, and ester quats, in particular quaternized fatty acid alkanolamine ester salts. Typical examples of amphoteric or zwitt Erionic surfactants are ammopropionates, ammoglycinates, imidazolinium betame and sulfobetaines. Alkyl sulfates, mono and dialkyl sulfosuccinates, alkyl sulfoacetates and / or isothionates are preferably used. The surfactants mentioned are exclusively known compounds. With regard to the structure and preparation of these substances, see the relevant review, for example. Falbe (ed.), "Surfactants in Consumer Products", Springer Verlag, Berlin, 1987, pp. 54-124 or J.Falbe (ed.), "Catalysts, surfactants and mineral oil additives", Thieme Verlag, Stuttgart, 1978, p 123-217 syndet soaps

Syndet soaps with a particularly beneficial feeling on the skin and creamy foam contain the ingredients in the following amounts

(a) 1 to 55, preferably 5 to 40% by weight alkoxylated carboxylic acids,

(b) 5 to 40, preferably 15 to 30% by weight of starch and / or cellulose and optionally

(c) 0 to 50, preferably 25 to 45% by weight of further surfactants,

with the proviso that the amounts given may add up to 100% by weight with other customary auxiliaries and additives. Particularly preferred syndet soaps have the following composition

(a) 1 to 55, preferably 5 to 40% by weight alkoxylated carboxylic acids,

(b) 5 to 40, preferably 15 to 30% by weight starch and / or cellulose,

(c) 1 to 25, preferably 5 to 10% by weight of alkyl and / or alkenyl oligoglycosides and

also with the proviso that the amounts given may add up to 100% by weight with other conventional auxiliaries and additives. Instead of the alkyl and / or alkenyl oligoglycosides of component (c), fatty acid N-alkylpolyhydroxyalkylamides, preferably fatty acid N-al - Kylglucamide, monoglycid (ether) sulfates, preferably coconut fatty acid monoglycid sulfate, betaines, fatty acid polyglycol ester sulfates and olefin sulfonates, preferably α-olefin sulfonates, are used

Further preferred constituents of the syndet soaps according to the invention are fatty alcohols and polyethylene glycol ethers. Typical examples of suitable fatty alcohols are lauryl alcohol, mystyl alcohol, cetearyl alcohol, stearyl alcohol and isostearyl alcohol. Suitable polyethylene glycol ethers are those which have an average molecular weight in the range from 5,000 to 20,000 daltons

In a preferred embodiment of the invention, component (a) and, if appropriate, further surfactants are used in anhydrous, granular form, as obtained after drying in a so-called "flash dryer". Here, reference is made to the teaching of German patent DE 19534371 C1 (Henkel) directed Industrial applicability

The syndet soaps according to the invention are practically free of free fatty acids or fatty acid salts, that is to say the content of these substances is below 0.5% by weight. However, the soaps in use provide a surprisingly high amount of a particularly creamy foam and also impart a very pleasant feeling on the skin

Auxiliaries and additives

These syndet soaps can also be used as further auxiliaries and additives, mild surfactants (see above), oils, superfatting agents, consistency enhancers, thickeners, polymers, silicone compounds, fats, waxes, lecithins, phospholipids, stabilizers, biogenic agents, film formers, swelling agents, UV Sun protection factors, antioxidants, hydrotropes, insect repellents, solubilizers, perfumes, dyes and the like contain

Guerbet alcohols based on fatty alcohols with 6 to 18, preferably 8 to 10 carbon atoms, esters of linear C6-C2 ₂ fatty acids with linear C6-C ₂ 2 -fatty alcohols, esters of branched C6-Ci3-carboxylic acids come as oil bodies, for example linear C6-C22-fatty alcohols, such as Myπstylmyπstat, Myπstyipalmitat, Myπstylstearat, Myπstylisostearat, Myπstyloleat, Myπstylbehenat, My- πstylerucat, Cetylmyπstat, cetyl palmitate, cetyl stearate, Cetylisostearat, cetyl oleate, cetyl behenate, Cety- lerucat, Stearylmyπstat, Stearylpaimitat, stearyl stearate, Stearylisostearat, stearyl oleate , stearyl behenate, Stearylerucat, Isostearylmyπstat, isostearyl palmitate, Isostearylstearat, Isostearyhsostearat, Isostearyloleat, isostearyl behenate, Isostearyloleat, Oleylmyπstat, oleyl palmitate, oleyl stearate, Oleyhsostearat, oleyl oleate, Oleylbehenat, oleyl Behenylmyπstat, behenyl palmitate, behenyl, Beheny- lisostearat, behenyl oleate, behenyl behenate, behenyl erucate, Erucylmyπstat , Erucyl palmitate, erucyl stearate, erucy sostearate, erucyl oleate, erucyl behenate and erucylerucate In addition, esters of linear C6-C22 fatty acids with branched alcohols, in particular 2-ethylhexanol, esters of hydroxycarboxylic acids with linear or branched Cδ-C∑∑- Fatty alcohols, in particular dioctyl malates, esters of linear and / or branched fatty acids with polyhydric alcohols (such as propylene glycol, dimer diol or tπmertπol) and / or Guerbet alcohols, Tπglycine based on C6-Cιo fatty acids, liquid mono- / di- / Tπglyceπdmιschungen based on C6-Ci8 fatty acids, esters of Cδ-C22 fatty alcohols and / or Guerbet alcohols with aromatic carboxylic acids, especially benzoic acid, esters of C2-Ci2-Dicarboxylic acids with linear or branched alcohols with 1 to 22 carbon atoms or polyols 2 to 10 carbon atoms and 2 to 6 hydroxyl groups, vegetable oils, branched primary alcohols, substituted cyciohexanes, linear and branched C6 -C22 fatty alcohol carbonates, Guerbet carbonates, esters of benzoic acid with linear and / or branched C6-C ₂ alcohols (eg Finsolv® TN), linear or branched, symmetrical or unsymmetrical dialkyl ethers with 6 to 22 Carbon atoms per alkyl group are ring opening products of epoxidized fatty acid esters with polyols, silicone oils and / or aliphatic or naphthenic hydrocarbons such as, for example, squalane, squalene or dialkylcyclohexane

Substances such as, for example, lanolin and lecithin and polyethoxylated or acylated lanolin and lecithin derivatives, polyol fatty acid ester monoglycides and fatty acid alkanolamides can be used as superfatting agents, the latter simultaneously serving as foam stabilizers

Possible consistency agents are primarily fatty alcohols or hydroxyfatty alcohols with 12 to 22 and preferably 16 to 18 carbon atoms and also partial glycides, fatty acids or hydroxyfatty acids. A combination of these substances with alkylohgoglucosides and / or fatty acid N-methylglucamides of the same chain length and is preferred / or polyglycerol poly-12-hydroxystearates

Suitable thickeners are, for example, Aerosil types (hydrophilic silicas), polysaccharides, in particular xanthan gum guar guar, agar agar, algmates and tyloses carboxymethyl cellulose and hydroxyethyl cellulose, and also high molecular weight polyethylene glycol mono- and diesters of fatty acid polyacrylates, (e.g. B Carbopole® from Goodrich or Synthalene® from Sigma), polyacrylamides, polyvinyl alcohol and polyvinylpyrrohdon, surfactants such as, for example, ethoxylated fatty acid glycendes, esters of fatty acids with polyols such as, for example, pentaerythritol or Tπmethylolpropane, fatty alcohol ethoxyates with restricted homolog distribution or alkyl oligoglucosides and electrolytes Ammoniumchloπd

Suitable cationic polymers are, for example, cationic cellulose derivatives, such as, for example, a quaternized hydroxyethyl cellulose, which is available under the name Polymer JR 400® from Amerchol, cationic strong copolymers of diallylammonium salts and acrylamides, quaternized vinylpyrrohdon / vinylidazole polymers such as, for example, Luviquat® (BASF) , Condensation products of polyglycols and amines, quaternized collagen polypeptides, such as, for example, lauryldimonium hydroxypropyl hydrolyzed collagen (Lamequat®L / Grunau), quaternized wheat polypeptides, polyethylene imine, cationic silicone copolymers, such as amidomethicone, copolymers of adipic acid and dimethylaminodehyde hydroxymethyldiamine-hydroxymetaminethyne-hydroxymethylamine-hydroxymethylamine-hydroxymethylamine-hydroxymethylamine-hydroxypropyl ® / Sandoz), copolymers of acrylic acid with dimethyl-dialiylammonium chloride (Merquat® 550 / Chemvιron), polyammopolyamides such as described in FR 2252840 A and their crosslinked water-soluble polymers, cationic chitin derivatives such as quaternized chitosan, g If necessary, microcrystalline distribution, condensation products of dihaloalkylene, such as dibromobutane with bisdialkylamines, such as Bιs-Dιmethyiamιno-1, 3-propane, cationic guar gum, such as Jaguar® CBS, Jaguar® C-17, Jaguar® C- 16 from Celanese, quaternized ammonium salt polymers such as Mirapol® A-15, Mirapol® AD-1, Mirapol® AZ-1 from Miranol Anionic, zwitterionic, amphoteric and nonionic polymers include, for example, vinyl acetate / crotonic acid copolymers vinylpyrrohdon / vinyl acrylate copolymers, vinyl acetate / butyl maleate / isobornylacrylate copolymers, methyivinyl ether / maleic anhydride, acrylamide and polyamide acrylate and polyamide acrylate and polyamide acrylate and polyamides, and their amide, polyamide acrylate and polyamide acrylate and polyamide acrylate and polyammonyl amide, polyamide acrylate and polyamide acrylate and polyamide unreacted with, amyl methacrylate and polyamide acrylate and polyamide unreacted with, Copolymers, octyiacrylamide / methyl methacrylate / tert-butylamine methyl methacrylate / 2-hydroxypropyl methacrylate copolymers, polyvinylpyrrohdon, vinylpyrrohdon / vinyl acetate copolymers vinylpyrrolidone / dimethylaminoethyl methacrylate / vinylcaprolactam-terpolymers and optionally cellulose ether

Suitable silicone compounds are, for example, dimethylpolysiloxanes, methylphenylpolysiloxanes, cychsche silicones and ammo-, fatty acid-, alcohol-, polyether-, epoxy-, fluorine-, glycoside- and / or alkyl-modified silicone compounds, which can be both liquid and resinous at room temperature Simethicones, which are mixtures of dimethicones with an average chain length of 200 to 300 dimethylsiloxane units and hydrogenated silicates, are suitable. A detailed overview of suitable volatile silicones can also be found by Todd et al in Cosm.Toil. 9J, 27 (1976).

Typical examples of fats are glycine, natural waxes such as e.g. Candehllaw wax, carnauba wax, Japanese wax, esparto grass wax, cork wax, guaruma wax, rice germol wax, sugar cane wax, Ouπcury wax, montan wax, beeswax, shellac wax, walnut, lanolin (wool wax), broom fat, ceresin, ozokent (earth wax), petrolatum, paraffin wax, chemically modified waxes (hard waxes), such as montan ester waxes, sasol waxes, hydrogenated jojoba waxes and synthetic waxes, such as polyalkylene waxes and polyethylene glycol waxes. In addition to the fats, fat-like substances such as lecithins and phospholipids are also suitable The term “lecithme” is understood by the person skilled in the art to mean those glycerophosphides which form from fatty acids, glycines, phosphoric acid and choline by esterification. Lecithms are therefore often referred to in the art as phosphatidylchone (PC) and follow the general formula

wobei R typischerweise für lineare aliphatische Kohlenwasserstoffreste mit 15 bis 17 Kohlenstoffatomen und bis zu 4 cis-Doppelbindungen steht Als Beispiele für natürliche Lecithme seien die Kephahne genannt, die auch als Phosphatidsauren bezeichnet werden und Derivate der 1 ,2-Dιacyl-sn-glyceπn-3- phosphorsauren darstellen Dem gegenüber versteht man unter Phospholipiden gewöhnlich Mono- und vorzugsweise Diester der Phosphorsaure mit Glyceπn (Glyceπnphosphate), die allgemein zu den Fetten gerechnet werden Daneben kommen auch Sphingosine bzw Sphingo pide in Frage

where R typically stands for linear aliphatic hydrocarbon radicals with 15 to 17 carbon atoms and up to 4 cis double bonds. Examples of natural lecithms include the Kepfahne, which are also referred to as phosphatidic acids, and derivatives of 1,2-diacyl-sn-glycine-3 - Represent phosphoric acids In contrast, phospholipids are usually understood to be mono- and preferably diesters of phosphoric acid with Glyceπn (Glyceπnphosphate), which are generally classified as fats. In addition, sphingosines or Sphingo pide are also suitable

Metal salts of fatty acids, such as magnesium aluminum and / or zinc stearate or -πcmoleate, can be used as stabilizers

Biogenic active substances are, for example, tocopherol tocopherol acetate, tocopheroipalmitate, ascorbic acid, deoxyπbonucleic acid, retinol, bisabolol, allantom, phytantπol, panthenol, AHA acids, amino acids, ceramides, pseudoceramides, essential oils, plant extracts and vitamin complexes

Common film formers are, for example, chitosan, microcrystalline chitosan, quaternized chitosan, polyvinylpyrrohdon, vinylpyrrolidone-vinyl acetate copolymers, polymers of the acrylic acid series, quaternary cellulose derivatives, coils, hyaluronic acid or compounds thereof and similar compounds

Montmoπllonite, clay minerals, pemulene and alkyl-modified carbopol types (Goodπch) can serve as swelling agents for aqueous phases. Further suitable polymers or swelling agents can be found in the overview by R Lochhead in Cosm.Toil. 108, 95 (1993)

UV light protection factors are, for example, organic substances (light protection filters) which are liquid or crystalline at room temperature and which are able to absorb ultraviolet rays and release the absorbed energy in the form of boring radiation, for example heat. U VB filters can be unsuitable or be water-soluble. Examples of olloic substances are

> 3-Benzyhdencampher or 3-Benzylιdennorcampher and its Deπvate, eg 3- (4-Methylbenzy- lιden) camphor as described in EP 0693471 B1,

4-amino benzoic acid derivatives, preferably 4- (dimethylamino) benzoic acid 2-ethylhexyiester, 4- (dimethylamino) benzoic acid 2-octyl ester and 4- (dimethylamino) benzoic acid amyl ester,

> Esters of cinnamic acid, preferably 2-ethylhexyl 4-methoxyzιmtsaure, 4-methoxyzιmtsaurepro- pylester, 4-methoxyzιmtsaureιsoamylester 2-cyano-3,3-phenylzιmtsaure-2-ethylhexyl ester (octocrylene),

> Esters of sahcyl acid, preferably 2-ethylhexyl sahcylate, 4-isopropylbenzylsylate, homomethyl salicylate,

> Derivatives of benzophenone, preferably 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenπzophenone, 2,2'-dihydroxy-4-methoxybenzophenone,

> Esters of benzalmalonic acid, preferably 4-methoxybenzmalonic acid 2-ethylhexyl ester, Tπazindenvate, such as 2.4 6-Trιanιlιno- (p-carbo-2'-ethyl-1 '-hexyloxy) -1, 3,5-tπazιn and octyl Tna- zon, as described in EP 0818450 A1 or dioctyl Butamido Tπazone (Uvasorb® HEB),

> Propane-1,3-dione, such as 1- (4-tert-butylphenyl) -3- (4'methoxyphenyl) propane-1,3-dione,

> Ketotπcyclo (5 2 1 0) decane-Deπvate, as described in EP 0694521 B1

Possible water-soluble substances

> 2-phenylbenzιmιdazol-5-sulfonic acid and its alkali, alkaline earth, ammonium, alkylammonium, alkanolammonium and glucammonium salts,

> Sulfonic acid derivatives of benzophenones, preferably 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid and its salts,

> Sulfonic acid derivatives of 3-benzyl camphor, such as 4- (2-oxo-3-bomyl-iodomethyl) benzene-sulfonic acid and 2-methyl-5- (2-oxo-3-bornyl-iodine) sulfonic acid and their salts

Typical UV-A filters include, in particular, derivatives of benzoylmethane, such as 1- (4'-tert-butylphenyl) -3- (4'-methoxyphenyl) propane-1, 3-dione, 4-tert-butyl-4 '-methoxydιbenzoyl- methane (Parsol 1789), 1-phenyl-3- (4'-isopropyiphenyl) propane-1, 3-dion and enamine compounds as described in DE 19712033 A1 (BASF) The UV-A and UV B filters can of course also be used in mixtures. In addition to the soluble substances mentioned, insoluble light-protection pigments, namely finely dispersed metal oxides or salts, are also suitable for this purpose. Examples of suitable metal oxides are, in particular, zinc oxide and titanium dioxide and, in addition, oxides of iron, zirconium, silicon, manganese , Aluminum and cerium and their mixtures. Silicates (talc), tree sulfate or zinc stearate can be used as salts. The oxides and salts are used in the form of the pigments for skin-care and skin-protecting emulsions and decorative cosmetics. The particles should have an average diameter of less than 100 nm, preferably between 5 and 50 nm and in particular between 15 and 30 nm. They can have a spherical shape, but it is also possible to use particles which have an elhpsoidal shape or have a shape which differs from the spherical shape in some other way. The pigments can also be surface-treated, ie hydrophilized or hydrophobicized Typical examples are coated titanium dioxides, such as titanium dioxide T 805 (Degussa) or Eusolex® T2000 (Merck). The most suitable hydrophobic coating agents are silicones and especially talkoxyoxyctylsilanes or simethicones. So-called micro- or nanopigments are used t Micronized zinc oxide is preferably used. Further suitable UV light protection filters can be found in the overview by P Finkel in SÖFW-Journal 122, 543 (1996)

In addition to the two aforementioned groups of primary light stabilizers, secondary light stabilizers of the antioxidant type can also be used, which interrupt the photochemical reaction chain which is triggered when UV radiation reaches the skin. Typical examples for this are amino acids (e.g. glycine, histidine, tyrosine, tryptophan) and their derivatives, imidazoles (e.g. urocanic acid) and their derivatives, peptides such as D, L-carnosine, D-camosine, L-camosine and their derivatives (e.g. anserine), carotenoids , Carotenes (e.g. α-carotene, β-carotene, lycopene) and their derivatives, chlorogenic acid and their derivatives, lipoic acid and their derivatives (e.g. dihydroliponic acid), aurothioglucose, propylthiouracil and other thiols (e.g. thioredoxin, glutathione, cysteine, cystine, Cystamine and their glycosyl, N-acetyl, methyl, ethyl, propyl, amyl, butyl and lauryl, palmitoyl, oleyl, γ-linoleyl, cholesteryl and glyceryl esters) and their salts, dilauryl thiodipropioπat , Distearyl thiodipropionate, thiodipropionic acid and their derivatives (esters, ethers, peptides, lipids, nucleotides, nucleosides and salts) as well as sulfoximine compounds (eg buthioninsulfoximines, homocysteine sulfoximine, Butioninsulfone, penta-, hexa-, heptathioninsulfoximine) in very low tolerable do solutions (eg pmol to μmol / kg), also (metal) chelators (eg α-hydroxy fatty acids, palmitic acid, phytic acid, lactoferrin), α-hydroxy acids (eg citric acid, lactic acid, malic acid), humic acid, bile acid, bile extracts, bilirubin , Biliverdin, EDTA, EGTA and their derivatives, unsaturated fatty acids and their derivatives (e.g. γ-linolenic acid, linoleic acid, oleic acid), folic acid and their derivatives, ubiquinone and ubiquinol and their derivatives, vitamin C and derivatives (e.g. ascorbyl palmitate, Mg-ascorbyl phosphate, Ascorbylacetate), tocopherols and derivatives (e.g. vitamin E acetate), vitamin A and derivatives (vitamin A palmitate) and coniferyl benzoate of benzoin, rutinic acid and its derivatives, α-glycosyl rutin,

Ferulic acid, Furfurylidenglucitol, carnosine, butylhydroxytoluene, butylhydroxyanisole, Nordihydroguajak- resin acid, nordihydroguaiaretic acid, trihydroxybutyrophenone, uric acid and derivatives thereof, mannose and derivatives thereof, superoxide dismutase, zinc and derivatives thereof (for example ZnO, ZnS0 _4), selenium and derivatives thereof ( eg selenium-methionine), stilbenes and their derivatives (eg stilbene oxide, trans-stilbene oxide) and the derivatives (salts, esters, ethers, sugars, nucleotides, nucleosides, peptides and lipids) of these active substances which are suitable according to the invention.

Hydrotropes, such as ethanol, isopropyl alcohol, or polyols can also be used to improve the flow behavior. Polyols that come into consideration here preferably have 2 to 15 carbon atoms and at least two hydroxyl groups. The polyols can also contain further functional groups, in particular amino groups, or be modified with nitrogen. Typical examples are

> Glycerin; Alkylene glycols, such as, for example, ethylene glycol, diethylene glycol, propylene glycol, butylene glycol, hexylene glycol and polyethylene glycols with an average molecular weight of 100 to 1,000 daltons;

> technical oligoglycerol mixtures with a degree of self-condensation of 1.5 to 10 such as technical diglycerol mixtures with a diglycerol content of 40 to 50% by weight;

> Methyl compounds, such as in particular trimethylolethane, trimethylolpropane, trimethylolbutane, pentaerythritol and dipentaerythritol; > Lower alkyl glucosides, especially those with 1 to 8 carbons in the alkyl radical, such as methyl and butyl glucoside;

> Sugar alcohols with 5 to 12 carbon atoms, such as sorbitol or mannitol, sugars with 5 to 12 carbon atoms, such as glucose or sucrose;

> Aminosugars such as glucamine;

> Dialcohol amines, such as diethanolamine or 2-amino-1, 3-propanediol.

Mixtures of natural and synthetic fragrances may be mentioned as perfume gels. Natural fragrances are extracts of flowers (lily, lavender, roses, jasmine, neroli, ylang-ylang), stems and leaves (geranium, patchouli, petitgrain), fruits (anise, coriander, caraway, juniper), fruit peel (bergamot, lemon, Oranges), roots (mace, angelica, celery, cardamom, costus, iris, calmus), wood (pine, sandal, guaiac, cedar, rosewood), herbs and grasses (tarragon, lemongrass, sage, thyme), Needles and twigs (spruce, fir, pine, mountain pine), resins and balms (galbanum, elemi, benzoin, myrrh, olibanum, opoponax). Animal raw materials, such as civet and castoreum, are also suitable. Typical synthetic fragrance compounds are products of the ester, ether, aldehyde, ketone, alcohol and hydrocarbon type. Fragrance compounds of the ester type are e.g. Benzyl acetate, phenoxyethyl isobutyrate, p-tert-butylcyclohexyl acetate, linalyl acetate, dimethylbenzylcarbinylacetate, phenylethyl acetate, linalylbenzoate, benzyl formate, ethylmethylphenylglycinate, allylcyclohexyipropionate, styrallylpropionyl and benzylate propionate. The ethers include, for example, benzyl ethyl ether, the aldehydes e.g. the linear alkanals with 8 to 18 carbon atoms, citral, citronellal, citronellyloxyacetaldehyde, cyclamenaldehyde, hydroxycitronellal, lilial and bourgeonal, to the ketones e.g. the jonones, α-isomethylionone and methyl cedryl ketone, the alcohols anethole, citronellol, eugenol, isoeugenol, geraniol, linalool, phenylethyl alcohol and terpineol, the hydrocarbons mainly include the terpenes and balsams. However, preference is given to using mixtures of different fragrances which together produce an appealing fragrance. Essential oils of lower volatility, which are mostly used as aroma components, are also suitable as perfume oils, e.g. Sage oil, chamomile oil, clove oil, lemon balm oil, mint oil, cinnamon leaf oil, linden blossom oil, juniper berry oil, vetiver oil, oliban oil, galbanum oil, labolanum oil and lavandin oil. Preferably, bergamot oil, dihydromyrcenol, lilial, lyral, citronellol, phenylethyl alcohol, α-hexylcinnamaldehyde, geraniol, benzyl acetone, cyclamen aldehyde, linalool, Boisambrene Forte, Ambroxan, indole, hedione, Sandelice, lemon oil, mandarin oil, orange oil, allyl amyl glycolate, Cyclovertal, lavandin oil, muscatel Sage oil, ß-Darπascone, geranium oil bourbon, cyclohexyl salicylate, Vertofix Coeur, Iso-E-Super, Fixolide NP, Evemyl, Iraldein gamma, phenylacetic acid, geranyl acetate, benzyl acetate, rose oxide, romiillate, irotyl and floramate used alone or in mixtures.

The dyes which can be used are those which are suitable and approved for cosmetic purposes, as described, for example, in the publication "Cosmetic Dyes" of commission of the German Research Foundation, Verlag Chemie, Weinheim, 1984, pp. 81-106. These dyes are usually used in concentrations of 0.001 to 0.1% by weight, based on the mixture as a whole.

The total proportion of auxiliaries and additives can be 1 to 50, preferably 5 to 40,% by weight, based on the composition. The agents can be produced by customary cold or hot processes; the phase inversion temperature method is preferably used.

Examples

On the basis of the following formulations 1 to 4 (syndet bars, according to the invention) and V1 (combibar, for comparison), soap bars were pressed and examined for their application properties. The composition of the soap bars and the results of the tests are summarized in Table 1.

Table 1:

Compositions and properties of bar soaps (quantities as% by weight)

I partially hydrolyzed corn starch * ^* ) acid-degraded corn starch (Cerestar) The examples and the comparative example show clear advantages for the syndet bar formulations according to all test criteria: the syndet soaps have a very pleasant feeling on the skin (++ / +++) and develop a large amount of creamy friction foam (++ / +++). They show no tendency to absorb water (-) or to form cracks after drying (-), but they are extremely malleable (++ / +++). In contrast, the skin feel and foaming power of the Combibar formulation are only average (+), the pieces are comparatively difficult to deform (+) and show both a tendency to crack (+) and water absorption (+).

Claims

claims 1. Containing syndet soaps (a) alkoxylated carboxylic acid esters of the formula (I),

in which R ¹ CO stands for an aliphatic acyl radical with 6 to 30 C atoms, AlkO for alkylene oxide, n for numbers from 1 to 30 and R ² for an aliphatic alkyl radical with 1 to 8 carbon atoms, and (b) Strength and / or strength. 2. Syndet soaps according to claim 1, characterized in that they contain as component (a) alkoxylated carboxylic acid esters of the formula (I) in which R ¹ CO is a linear or branched, saturated or unsaturated acyl radical having 10 to 18 carbon atoms, AlkO for ethylene oxide and / or propylene oxide, n represents numbers from 5 to 20 and R ^{2 represents} methyl. 3. Syndet soaps according to claims 1 and / or 2, characterized in that they contain wheat and / or corn starch as builders. 4. Syndet soaps according to at least one of claims 1 to 3, characterized in that they further contain anionic, nonionic, cationic and / or amphoteric and / or zwitterionic surfactants. 5. syndet soaps according to at least one of claims 1 to 4, characterized in that they further contain alkyl and alkenyl oligoglycosides of the formula (II),

in which R ^{3 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. 6. syndet soaps according to at least one of claims 1 to 5, characterized in that they contain surfactants which are selected from the group formed by fatty acid N-alkylpolyhydroxyalkylamides, monoglyceride (ether) sulfates, betaines, fatty acid polyglycol ester sul acts and / or olefin sulfonates sulfosuccinates, alkyl sulfates, alkyl sulfoacetates, and / or isothionates 7 syndet soaps according to at least one of claims 1 to 6, characterized in that they further contain fatty alcohols and / or polyethylene glycol ethers 8 syndet soaps according to at least one of claims 1 to 7, characterized in that the content of free fatty acids or fatty acid salts is below 0.5% by weight 9 syndet soaps according to at least one of claims 1 to 8, characterized in that they (a) 1 to 55% by weight of alkoxylated carboxylic acids, (b) 5 to 40% by weight of starch and / or cellulose and optionally (c) 0 to 50% by weight of further surfactants included, with the proviso that the amounts given may add up to 100% with other conventional auxiliaries and additives 10. Syndet soaps according to at least one of claims 1 to 9, characterized in that component (a) and optionally the further surfactants are used in practically anhydrous, granular form