EP1174494B1 - Soap bar comprising talc, alkali fatty acid and anionic surfactant, but not comprising alkyl oligoglycosides - Google Patents

Abstract

A shaped soap product free of alkyl-(oligo)-glycosides contains (a) talc, (b) a 12-22C fatty acid in alkali soap form and (c) an anionic surfactant.

Description

The present invention relates to cosmetic cleansers in the form of shaped soap products. Such agents are known per se. These are essentially surface-active substances or substance mixtures which are offered to the consumer in various preparations. More particularly, the invention relates to bar soaps having improved smoothness and lime soap dispersibility by containing talc and one or more anionic surfactants in the simultaneous absence of alkyl (oligo) glycosides.

Surface-active substances - most prominently the alkali salts of higher fatty acids, ie the classic "soaps" - are amphiphilic substances that can emulsify organic non-polar substances in water.

These substances not only leach dirt from the skin and hair, they irritate, depending on the choice of surfactant or surfactant, skin and mucous membranes more or less strong. While a large number of fairly mild surfactants are available, the prior art surfactants are either mild but clean poorly, or they clean well, but irritate skin or mucous membranes.

Even with a simple water bath without the addition of surfactants, there is initially a swelling of the horny layer of the skin, wherein the degree of this swelling depends, for example, on the duration of the bath and its temperature. At the same time water-soluble substances, such as water-soluble soil constituents, but also skin-own substances that are responsible for the water-binding capacity of the horny layer, washed off or washed out.

In addition, skin fats are to a certain extent dissolved and washed out by the skin's own surface-active substances. This causes after initial swelling a significant dehydration of the skin, which can be strengthened by detergent additives.

So it was a matter of remedying these evils.

In healthy skin, these processes are generally irrelevant, as the protective mechanisms of the skin can readily compensate for such minor disorders of the upper layers of the skin. But even in the case of non-pathological deviations from the normal status, e.g. due to environmental wear or irritation, light damage, aging skin, etc., the protective mechanism of the skin surface is disturbed. Under certain circumstances, he is then no longer able to fulfill his task on his own and must be regenerated by external measures. Object of the present invention was thus to remedy this deficiency of the prior art.

In the body cleansing bar soaps play a major role, which are nowadays industrially produced by continuous saponification of free fatty acids with alkalis, concentrating the base soaps and spray drying. A distinction is made between real alkali soaps containing exclusively fatty acid salts and optionally still free fatty acids and so-called "combibars", bar soaps which in addition to fatty acid salts have other synthetic surfactants, usually fatty alcohol ether or fatty acid isothionates. A special position, however, take the Syndetstückseifen, so-called "Syndetbars", which are free of impurities except for fatty acid salts and contain only synthetic surfactants.

In Germany alone, several million pieces of soaps are sold every year for personal hygiene. However, the requirements of the market for these mass consumables are becoming ever higher: bar soaps not only have to cleanse the skin but also care for it, ie prevent it from drying out, degrease it and provide protection against outside influences. Of course, it is expected that the soap is particularly compatible with the skin, but it should still give as much and creamy foam in the application and cause a pleasant feeling on the skin. In this context, manufacturers of bar soaps are constantly looking for new ingredients that meet this increased requirement profile.

One differentiates between solid, usually piece-shaped, and liquid soaps. Main components are the alkali salts of the fatty acids of natural oils u. Fats, preferably the chain lengths C ₁₂ -C ₁₈ . Since lauric acid soaps foam particularly well, the lauric acid-rich coconut and palm kernel oils are preferred raw materials for the production of fine soap. The sodium salts of the fatty acid mixtures are solid, the potassium salts soft-pasty. For saponification, the diluted sodium or potassium hydroxide solution is added to the fatty raw materials in a stoichiometric ratio so that an excess of alkali of not more than 0.05% is present in the finished soap. In many cases, the soaps are no longer produced directly from the fats, but from the fatty acids obtained by lipolysis.

Common soap additives include fatty acids, fatty alcohols, lanolin, lecithin, vegetable oils, partial glycerides and other fat-like substances to restore the cleansed skin, antioxidants such as ascorbyl palmitate or tocopherol to prevent soap auto-oxidation (rancidity), complexing agents such as nitrilotriacetate to bind heavy metal traces, which could catalyze the autoxidative spoilage, perfume oils to obtain the desired scents, colorants to color the soap bars and, if desired, special additives.

• Toilettenseifen mit 20 - 50 % Kokosöl im Fettansatz, bis 5 % Rückfetter-Anteil und 0,5
• 2 % Parfümöl, sie bilden den größten Anteil der Feinseifen;
• Luxusseifen mit bis zu 5% besonders kostbarer Parfümöle;
• Deoseifen mit Zusätzen desodorierender Wirkstoffe, wie z. B. 3,4,4'-Trichlorcarbanilid (Triclocarban);
• Cremeseifen mit besonders hohen Anteilen rückfettender und die Haut cremender Substanzen;
• Babyseifen mit guter Rückfettung und zusätzlich pflegenden Anteilen wie z. B. Kamille-Extrakten, allenfalls sehr schwach parfümiert;
• Hautschutzseifen mit hohen Anteilen rückfettender Substanzen sowie weiteren pflegenden und schützenden Zusätzen, wie z. B. Proteinen;
• Transparentseifen mit Zusätzen von Glycerin, Zucker u. a., welche die Kristallisation der Fettsäuresalze in der erstarrten Seifenschmelze verhindern und so ein transparentes Aussehen bewirken;
• Schwimmseifen mit einer Dichte < 1, hervorgerufen durch bei der Herstellung kontrolliert eingearbeitete Luftbläschen.
• Seifen mit abrasiven Zusätzen zur Reinigung stark verschmutzter Hände.

The most important types of fine soap are:

• Toilet soaps with 20 - 50% coconut oil in the fat mixture, up to 5% Rückfetter share and 0.5
• 2% perfume oil, they make up the largest share of fine soaps;
• Luxury soaps with up to 5% of particularly precious perfume oils;
• Deo-soaps with additives of deodorizing agents such. B. 3,4,4'-trichlorocarbanilide (triclocarban);
• Cream soaps with particularly high levels of moisturizing and creaming substances;
• Baby soaps with good moisturizing and additional nourishing shares such. B. chamomile extracts, at best very poorly perfumed;
• Skin protection soaps with high levels of moisturizing substances as well as other nourishing and protective additives, such as: Proteins;
• Transparent soaps with additions of glycerine, sugar, etc., which prevent the crystallization of the fatty acid salts in the solidified soap melt and thus produce a transparent appearance;
• Floating soaps with a density <1, caused by controlled air bubbles during manufacture.
• Soaps with abrasive additives to clean heavily soiled hands.

When washing with soap, the pH of the wash liquor is 8-10. This alkalinity neutralises the natural acid mantle of the skin (pH 5-6). Although this is regressed relatively quickly in normal skin, it can cause irritation in sensitive or damaged skin. Another disadvantage of the soaps is the formation of insoluble lime soaps in hard water. These disadvantages are not present in syndet soaps. They are based on synthetic anionic surfactants, which can be processed with builders, refillers and other additives to soap-like pieces. Their pH can be varied within wide limits and is usually adjusted to neutral pH 7 or the acid mantle of the skin adjusted to pH 5.5. They have excellent cleaning power, foam in any water hardness, even in seawater, the proportion of lubricating additives must be significantly higher than normal soaps because of their intensive cleaning and degreasing effect. Their disadvantage is the relatively high price.

Surfactants are amphiphilic substances that can dissolve organic, nonpolar substances in water. Due to their specific molecular structure with at least one hydrophilic and one hydrophobic part of the molecule, they ensure a reduction in the surface tension of the water, the wetting of the skin, the facilitation of dirt removal and dissolution, a gentle rinsing off and, as desired, foam regulation.

• anionische Tenside,
• kationische Tenside,
• amphotere Tenside und
• nichtionische Tenside.

The hydrophilic portions of a surfactant molecule are usually polar functional groups, for example -COO ^- , -OSO ₃ ^2- , -SO ₃ ^- , while the hydrophobic parts are usually nonpolar hydrocarbon radicals. Surfactants are generally classified according to the nature and charge of the hydrophilic part of the molecule. Here four groups can be distinguished:

• anionic surfactants,
• cationic surfactants,
• amphoteric surfactants and
• nonionic surfactants.

Anionic surfactants generally have carboxylate, sulfate or sulfonate groups as functional groups. In aqueous solution they form negatively charged organic ions in an acidic or neutral medium. Cationic surfactants are almost exclusively characterized by the presence of a quaternary ammonium group. In aqueous solution, they form positively charged organic ions in an acidic or neutral environment. Amphoteric surfactants contain both anionic and cationic groups and behave accordingly in aqueous solution depending on the pH as anionic or cationic surfactants. They have a positive charge in a strongly acidic environment and a negative charge in an alkaline environment. In the neutral pH range, however, they are zwitterionic, as the following example is intended to illustrate:

RNH ₂ ⁺ CH ₂ CH ₂ COOH X '(at pH = 2) X ^- = any anion, eg Cl ^-

RNH ₂ ⁺ CH ₂ CH ₂ COO ^- (at pH = 7)

RNHCH ₂ CH ₂ COO ^- B ⁺ (at pH = 12) B ⁺ = any cation, eg Na ⁺

Typical of non-ionic surfactants are polyether chains. Nonionic surfactants do not form ions in an aqueous medium.

It is known that fine soaps based on tallow and coconut fatty acids can be modified and improved by numerous additives in their performance properties. In common manuals, z. B. Geoffrey Martin: The Modern Soap and Detergent Industry, Vol. 1, (1959), Chapter VI Although inorganic fillers are described as extenders for soaps, but the talc is rather attributed to a detrimental effect in bar soaps. The addition of 5-20% talcum in Combibars is in DE 196 49 896 described. By this addition, the smoothness and Kalkseifendispergiervermögen should be improved.

The object of the invention has thus been to provide bar soaps that are free from the disadvantages described. It was also to be taken into account in particular that new bar soap compositions must also be industrially preparable, ie that the compositions have, for example, a sufficient but not too high ductility and do not tend to crack during drying.

Contrary to the expected from the prior art losses was surprisingly found that in bar soaps containing less than 1 Ges .-% alkyl glycosides as an additive, by adding talc a further improvement in the physical and performance properties, especially the washing and Kalkseifendispergiervermögens and the soap smoothness is achieved

Although the describes US 5,981,451 Soap bars with fillers, but could not point the way to the present invention.

• Talkum,
• 5 - 40 Gew.-% an einer Grundseife, deren Seifenbestandteile sich aus Natriumtallowat, Natriumcocoat und Natrium-Palmkernfettsäuresalz zusammensetzen,
• 5 - 30 Gew.-% freie Fettsäuren mit 12 - 22 C-Atomen
• und ein oder mehrere anionische Tenside
• wobei Alkyl-(oligo)-glycoside, die der Formel R¹-O(G)_x entsprechen, in der R¹ eine primäre C₁₂-C₁₆-Alkylgruppe und (G)_x ein Oligoglycosidrest ist, dessen Oligomerisationsgrad x = 1 bis 2 ist, allenfalls als Verunreinigungen in der dem erfindungemäßen Produkt zugrundeliegenden Masse zugegen sein dürfen, jedenfalls weniger als 1 Gew.-% betragen müssen

The subject of the invention is therefore a molded soap product containing

• Talc,
• 5 to 40% by weight of a base soap whose soap components are composed of sodium tallowate, sodium cocoate and sodium palm kernel fatty acid salt,
• 5 - 30 wt .-% of free fatty acids with 12 - 22 C-atoms
• and one or more anionic surfactants
• where alkyl (oligo) glycosides which correspond to the formula R ¹ -O (G) _x in which R ^{1 is} a primary C ₁₂ -C ₁₆ -alkyl group and (G) _{x is} an oligoglycoside radical whose degree of oligomerization x = 1 to 2, if necessary may be present as impurities in the mass underlying the erfindungemäßen product, at least less than 1 wt .-% must be present

Despite low total content of surface-active substances in the formulation, the cleaning performance and foaming remain unaffected. The skin feel is significantly improved when using this wash even without additional skin care substances.

The foam also gets a better creaminess and more volume, which was also not expected. Another advantage of this invention is that the compatibility of the wash is improved because the total content of surfactants is reduced.

Moreover, the shaped soap products according to the invention have a particularly smooth surface after the mechanical deformation. When applied, they produce a creamy, stable foam. The lime soap precipitate formed in hard water remains dispersed in the water and does not lead to the gray-greasy deposits on the surface of sanitary objects.

Talc is a hydrated magnesium silicate of the formula 3MgO · 4SiO ₂ · H ₂ O and Mg ₃ (Si ₄ O ₁₀₎ · (OH) ₂ or Mg ₆ (OH) ₄ [Si ₈ O _20] or Mg ₁₂ [Si ₁₆ O ₄₀ ], but may contain proportions of hydrated magnesium aluminum silicate of up to 12 wt .-% Al ₂ O ₃ , based on the total product. Talc is a white, usually very fine, practical Odorless to slightly earthy-smelling powder that feels greasy when rubbing without being greasy. It is insoluble in water, cold acids or alkalis. Depending on the country of origin, the chemical purity of the talc (based on the content of anhydrous magnesium silicate) should be 93-98%. Talcum is used for the production of pharmaceutical, but especially for the production of cosmetic powders, which are used for personal care, but is also suitable for tablet production as a lubricant or superplasticizer.

The particle diameter (equivalent spherical diameter) of the talc should be in the range of 0.5-50 μm. In general, talcum qualities which contain no more than 5% by weight of particles of less than 1 μm and not more than 5% by weight of particles of more than 50 μm in size have proved successful. Preferably, the proportion of particles larger than 40 microns in diameter (sieve residue), at most 2 wt .-%. The average particle diameter (D 50) is preferably 5 to 15 μm.

The content of impurities should not exceed 1.6% by weight of Fe ₂ O ₃ , 1% by weight of CaO and 1% by weight of unbound water (dry loss at 1050 ° C.). The content of hydrated magnesium aluminum silicate may be up to 60% by weight, calculated as Al ₂ O ₃ , up to 12% by weight.

Advantageously according to the invention, the shaped soap products contain from 1 to 20% by weight of talcum.

Advantageously according to the invention, the shaped soap products contain from 20 to 50% by weight of anionic surfactants.

In addition, the shaped soap products of the invention advantageously contain water in an amount of 5-35% by weight. The water content is partly due to the manufacturing process, on the other hand, it has a favorable effect on the use properties of the soap.

The fatty acids are used in the form of their alkali soap, usually as sodium soaps. The soaps can also be produced from the fats and oils directly by saponification (hydrolysis) with sodium hydroxide solution and separation of the glycerol. The shaped soap products according to the invention contain an additional amount of 5 to 30% by weight of free fatty acids having 12 to 22 C atoms. These may be identical to the fatty acids of the basic soap and be introduced by a corresponding Alkalalsunterschuß in the saponification in the basic soap. Preferably, however, the free fatty acids are added after saponification and after concentration, before drying.

1. 1. Acylglutamate, beispielsweise Natriumacylglutamat, Di-TEApalmitoylaspartat und Natrium Caprylic/ Capric Glutamat,
2. 2. Acylpeptide, beispielsweise Palmitoyl-hydrolysiertes Milchprotein, Natrium Cocoyl-hydrolysiertes Soja Protein und Natrium-/ Kalium-Cocoyl-hydrolysiertes Kollagen,
3. 3. Sarcosinate, beispielsweise Myristoyl Sarcosin, TEA-lauroyl Sarcosinat, Natriumlauroylsarcosinat und Natriumcocoylsarkosinat,
4. 4. Taurate, beispielsweise Natriumlauroyltaurat und Natriummethylcocoyltaurat,
5. 5. Acyllactylate, Lauroyllactylat, Caproyllactylat
6. 6. Alaninate
   Carbonsäuren und Derivate, wie

1. 1. Carbonsäuren, beispielsweise Laurinsäure, Aluminiumstearat, Magnesiumalkanolat und Zinkundecylenat,
2. 2. Ester-Carbonsäuren, beispielsweise Calciumstearoyllactylat, Laureth-6-Citrat und Natrium PEG-4-Lauramidcarboxylat,
3. 3. Ether-Carbonsäuren, beispielsweise Natriumlaureth-13-Carboxylat und Natrium PEG-6-Cocamide Carboxylat,

Advantageously used anionic surfactants are
Acylamino acids (and their salts), such as

1. 1. acylglutamates, for example sodium acylglutamate, di-TEApalmitoylaspartat and sodium caprylic / capric glutamate,
2. 2. acyl peptides, for example palmitoyl-hydrolyzed milk protein, sodium cocoyl-hydrolyzed soy protein and sodium / potassium cocoyl-hydrolyzed collagen,
3. 3. sarcosinates, for example myristoyl sarcosine, TEA lauroyl sarcosinate, sodium lauroyl sarcosinate and sodium cocoyl sarcosinate,
4. 4. taurates, for example sodium lauroyl taurate and sodium methyl cocoyl taurate,
5. 5. Acyl lactylates, lauroyl lactylate, caproyl lactylate
6. 6. Alaninates
   Carboxylic acids and derivatives, such as

1. 1. carboxylic acids, for example lauric acid, aluminum stearate, magnesium alkoxide and zinc undecylenate,
2. 2. Ester carboxylic acids, for example calcium stearoyl lactylate, laureth-6-citrate and sodium PEG-4-lauramide carboxylate,
3. 3. Ether carboxylic acids, for example sodium laureth-13-carboxylate and sodium PEG-6-cocamide carboxylate,

Phosphoric acid esters and salts such as DEA-oleth-10-phosphate and dilaureth-4-phosphate,

1. 1. Acyl-isethionate, z.B. Natrium-/Ammoniumcocoyl-isethionat,
2. 2. Alkylarylsulfonate,
3. 3. Alkylsulfonate, beispielsweise Natriumcocosmonoglyceridsulfat, Natrium C_12-14 Olefin-sulfonat, Natriumlaurylsulfoacetat und Magnesium PEG-3 Cocamidsulfat,
4. 4. Sulfosuccinate, beispielsweise Dioctylnatriumsulfosuccinat, Dinatriumlaurethsulfosuccinat, Dinatriumlaurylsulfosuccinat und Dinatriumundecylenamido-MEA-Sulfosuccinat

sowie
Schwefelsäureester, wie

1. 1. Alkylethersulfat, beispielsweise Natrium-, Ammonium-, Magnesium-, MIPA-, Tl-PA- Laurethsulfat, Natriummyrethsulfat und Natrium C_12-13-Parethsulfat,
2. 2. Alkylsulfate, beispielsweise Natrium-, Ammonium- und TEA-Laurylsulfat.

Sulfonic acids and salts, such as

1. 1. acyl isethionates, eg sodium / ammonium cocoyl isethionate,
2. 2. alkylaryl sulphonates,
3. 3. alkyl sulfonates, for example sodium coconut monoglyceride sulfate, sodium C _12-14 olefin sulfonate, sodium lauryl sulfoacetate and magnesium PEG-3 cocamide sulfate,
4. 4. Sulfosuccinates, for example dioctyl sodium sulfosuccinate, disodium laureth sulfosuccinate, disodium lauryl sulfosuccinate and disodium undecylenamido MEA sulfosuccinate

such as
Sulfuric acid esters, such as

1. 1. alkyl ether sulfate, for example sodium, ammonium, magnesium, MIPA, Tl-PA laureth sulfate, sodium myreth sulfate and sodium C _12-13 pareth sulfate,
2. 2. Alkyl sulfates, for example sodium, ammonium and TEA lauryl sulfate.

Particularly advantageous anionic surfactants are selected from the group of the alkali acyl isethionates. Addition of ethylene oxide to bisulfite gives the isethionic acid (oxyethanesulfonic acid, 2-hydroxyethanesulfonic acid) HO-CH ₂ -CH ₂ -SO ₃ H, the sodium salt of which after esterification with acyl chlorides affords the acyl isethionates. The sodium salts of the acyl isethionates are pH-sensitive; at pH values <6 or> 8, but also at temperatures> 50 ° C, hydrolysis occurs. in cold water, the acyl isethionates bad, but good in warm water soluble. Of the sodium cocoyl isethionate dissolve at 25 ° C to 0.01, at 70 ° C, however, 50 g in 100 ml of water. Sodium cocoyl isethionate foams well, u. although in the presence of the hardness of the water. Sodium cocoyl isethionate has been proven especially in combination with soaps based on fatty acids.

Sodium alkylisethionates are characterized by the following structure:

In addition to the anionic surfactants, in particular alkali acyl isethionates, the shaped soap products according to the invention may furthermore also contain as constituents nonionic, cationic and / or amphoteric or zwitterionic surfactants.

1. 1. Alkylamine,
2. 2. Alkylimidazole,
3. 3. Ethoxylierte Amine und
4. 4. Quaternäre Tenside.
5. 5. Esterquats

Advantageously to use cationic surfactants

1. 1. alkylamines,
2. 2. alkylimidazoles,
3. 3. Ethoxylated amines and
4. 4. Quaternary surfactants.
5. 5. Esterquats

Quaternary surfactants contain at least one N atom covalently bonded to 4 alkyl and / or aryl groups. This results in a positive charge regardless of the pH. Advantageous quaternary surfactants are alkyl betaine, alkyl amidopropyl betaine and alkyl amidopropyl hydroxysulfine. Cationic surfactants can furthermore preferably be chosen, for the purposes of the present invention, from the group of quaternary ammonium compounds, in particular benzyltrialkylammonium chlorides or bromides, such as benzyldimethylstearylammonium chloride, furthermore alkyltrialkylammonium salts, for example cetyltrimethylammonium chloride or bromide, alkyldimethylhydroxyethylammonium chlorides or bromides, dialkyldimethylammonium chlorides or bromides, alkylamidethyltrimethylammonium ether sulfates Alkylpyridinium salts, for example lauryl or cetylpyrimidinium chloride, imidazoline derivatives and compounds having a cationic character such as amine oxides, for example alkyldimethylamine oxides or alkylaminoethyldimethylamine oxides. Cetyltrimethylammonium salts are particularly advantageous to use.

1. 1. Acyl-/dialkylethylendiamin, beispielsweise Natriumacylamphoacetat, Dinatriumacylamphodipropionat, Dinatriumalkylamphodiacetat, Natriumacylamphohydroxypropylsulfonat, Dinatriumacylamphodiacetat und Natriumacylamphopropionat,
2. 2. N-Alkylaminosäuren, beispielsweise Aminopropylalkylglutamid, Alkylaminopropionsäure, Natriumalkylimidodipropionat und Lauroamphocarboxyglycinat.

Advantageously used amphoteric surfactants

1. 1. acyl / dialkylethylenediamine, for example sodium acylamphoacetate, disodium acylamphodipropionate, disodium alkylamphodiacetate, sodium acylamphohydroxypropylsulfonate, disodium acylamphodiacetate and sodium acylamphopropionate,
2. 2. N-alkylamino acids, for example aminopropylalkylglutamide, alkylaminopropionic acid, sodium alkylimidodipropionate and lauroamphocarboxyglycinate.

• 1. Alkohole,
• 2. Alkanolamide, wie Cocamide MEA/ DEA/ MIPA,
• 3. Aminoxide, wie Cocoamidopropylaminoxid,
• 4. Ester, die durch Veresterung von Carbonsäuren mit Ethylenoxid, Glycerin, Sorbitan oder anderen Alkoholen entstehen,
• 5. Ether, beispielsweise ethoxylierte/propoxylierte Alkohole, ethoxylierte/ propoxylierte Ester, ethoxylierte/ propoxylierte Glycerinester, ethoxylierte/ propoxylierte Cholesterine, ethoxylierte/ propoxylierte Triglyceridester, ethoxyliertes propoxyliertes Lanolin, ethoxylierte/ propoxylierte Polysiloxane, propoxylierte POE-Ether und Alkylpolyglycoside wie Laurylglucosid, Decylglycosid und Cocoglycosid.
• 6. Sucroseester, -Ether
• 7 Polyglycerinester, Diglycerinester, Monoglycerinester
• 8. Methylglucosester, Ester von Hydroxysäuren

Advantageously used nonionic surfactants are

• 1. Alcohols,
• 2. alkanolamides, such as cocamide MEA / DEA / MIPA,
• 3. amine oxides, such as cocoamidopropylamine oxide,
• 4. Esters formed by esterification of carboxylic acids with ethylene oxide, glycerol, sorbitan or other alcohols,
• 5. Ethers, for example ethoxylated / propoxylated alcohols, ethoxylated / propoxylated esters, ethoxylated / propoxylated glycerol esters, ethoxylated / propoxylated cholesterols, ethoxylated / propoxylated triglyceride esters, ethoxylated propoxylated lanolin, ethoxylated / propoxylated polysiloxanes, propoxylated POE ethers and alkyl polyglycosides such as lauryl glucoside, decyl glycoside and cocoglycoside.
• 6. sucrose ester, ether
• 7 polyglycerol esters, diglycerol esters, monoglycerol esters
• 8. Methyl glucose esters, esters of hydroxy acids

According to the invention, the absence of alkyl (oligo) glycosides. Alkyl (oligo) glycosides are known, commercially available nonionic surfactants which are accessible by relevant methods of organic chemistry and corresponding to the formula R ¹ -O (G) _x , in which R ^{1 is} a primary C ₁₂ -C ₁₆ - Alkyl group and (G) _{x is} an oligoglycoside whose degree of oligomerization x = 1 to 2. Representing the extensive literature is here on EP-A-0 301 298 and WO-A-90/3977 directed. The alkyl (oligo) glycosides can be derived from aldoses or ketoses with 5 or 6 carbons. For ease of accessibility, alkyl (oligo) glucosides derived primarily from glucose are produced on an industrial scale. Absence of these substances means that they may at most be present as impurities in the mass underlying the invention combibar, at least less than 1 wt .-% must be.

The molded soap product according to the invention may contain, as further auxiliaries and additives, oil bodies (moisturizers), emulsifiers, superfatting agents, fats, waxes, stabilizers, cationic polymers, silicone compounds, pigments, biogenic active substances, preservatives, dyes and fragrances.

1. 1. Langkettige Alkohole z.B. Lanolin, Cetylalkohol
2. 2. Mono- und Diglyceride bzw. die entsprechenden Glycolester
3. 3. Mono-, Di- und Triglyceride pflanzlichen Ursprungs z.B. Mandelöl
4. 4. Hydrierte Fette
5. 5. Vaseline
6. 6. Wachse

For example, backfats to be used according to the invention can advantageously be used:

1. 1. Long-chain alcohols such as lanolin, cetyl alcohol
2. 2. Mono- and diglycerides or the corresponding glycol esters
3. 3. mono-, di- and triglycerides of plant origin eg almond oil
4. 4. Hydrogenated fats
5. 5. Vaseline
6. 6. waxes

Further examples of greasing agents are oil bodies such as Guerbet alcohols based on fatty alcohols having 6 to 18, preferably 8 to 10, carbon atoms, esters of linear C ₆ -C ₂₀ fatty acids with linear C ₆ -C ₂₀ fatty alcohols, esters of branched C ₆ - C ₁₃ -carboxylic acids with linear C ₆ -C ₂₀ -fatty alcohols, esters of linear C ₆ -C ₁₈ -fatty acids with branched alcohols, in particular 2-ethylhexanol, esters of linear and / or branched fatty acids with polyhydric alcohols (for example Dimerdiol or trimerdiol) and / or Guerbetalkoho triglycerides based on C ₆ -C ₁₀ fatty acids, vegetable oils, branched primary alcohols, substituted cyclohexanes, Guerbetcarbon dialkyl ethers and / or aliphatic or naphthenic hydrocarbons into consideration.

Nonionic, ampholytic and / or zwitterionic surface-active compounds which are distinguished by a lipophilic, preferably linear, alkyl or alkenyl group and at least one hydrophilic group can be used as emulsifiers or coemulsifiers. This hydrophilic group can be both an ionogenic and a non-ionic group.

Nonionic emulsifiers contain as hydrophilic group z. A polyol group, a polyalkylene glycol ether group or a combination of polyol and polyglycol ether groups. Preference is given to those agents which, as O / W emulsifiers, comprise nonionic surfactants of at least one of the following groups: (a1) addition products of 2 to 30 moles of ethylene oxide and / or 0 to 5 moles of propylene oxide to linear fatty alcohols having 8 to 22 C-atoms, to fatty acids having 12 to 22 carbon atoms and to alkylphenols having 8 to 15 C atoms in the alkyl group; (a2) C _12/18 fatty acid _mono- and diesters of addition products of 1 to 30 moles of ethylene oxide with glycerol; (a3) glycerol mono- and diesters and sorbitan mono- and diesters of saturated and unsaturated fatty acids having 6 to 22 carbon atoms and their ethylene oxide addition products and (a4) addition products of 15 to 60 moles of ethylene oxide with castor oil and / or hydrogenated castor oil; (a5) polyol and especially polyglycerol esters such. As polyglycerol polyricinoleate or polyglycerol poly-12-hydroxystearate. Also suitable are mixtures of compounds of several of these classes of substances. The addition products of ethylene oxide and / or of propylene oxide to fatty alcohols, fatty acids, alkylphenols, glycerol mono- and diesters and sorbitan mono- and diesters of fatty acids or to castor oil are known, commercially available products. These are mixtures of homologs whose mean Alkoxylierungsgrad the ratio of the amounts of ethylene oxide and / or propylene oxide and substrate, with which the addition reaction is carried out corresponds. C _12/14 fatty acid mono- and diesters of addition products of ethylene oxide with glycerol are made DE-20 24 051 known as a refatting agent for cosmetic preparations.

Suitable w / o emulsifiers are: (b1) addition products of from 2 to 15 mol of ethylene oxide with castor oil and / or hydrogenated castor oil; (b2) _{partial esters} based on linear, branched, unsaturated or saturated C _12/22 fatty acids, ricinoleic acid and 12-hydroxystearic acid and glycerol, polyglycerol, pentaerythritol, dipentaerythritol, sugar alcohols (for example sorbitol) and also polyglucosides (eg. cellulose); (b3) trialkyl phosphates; (b4) wool wax alcohols; (b5) polysiloxane-polyalkyl-polyether copolymers or corresponding derivatives; (b6) mixed esters of pentaerythritol, fatty acids, citric acid and fatty alcohol according to DE-PS 11 65 574 and (b7) polyalkylene glycols.

Suitable cationic polymers are, for example, cationic cellulose derivatives, cationic starches, copolymers of diallylammonium salts and acrylamides, quaternized vinylpyrrolidone / vinylimidazole polymers such. B. Luviquat ™ (BASF AG), condensation products of polyglycols and amines, quaternized collagen polypeptides such as "Lauryldimonium-hydroxypropyl-hydrolyzed collagen" (Lamequat ™ L, Grünau GmbH) or "Lauryldimmonium-hydroxypropyl-hydroxylayed wheat protein" (Gluadin TM WQ, Grünau GmbH), polyethyleneimine, cationic silicone polymers such. B. Amidomethicone or Dow Corning, Dow Coming Co./US, copolymers of adipic acid and dimethylaminohydroxypropyl-diethylenetriamine (Cartaretine ™, Sandoz / CH), polyaminopolyamides such as. B. described in the FR 22 52 840-A and their crosslinked water-soluble polymers, cationic chitin derivatives such as quaternized chitosan, optionally microcrystalline distributed, cationic guar gum such. Jaguar ™ CBS, Jaguar ™ C-17, Jaguar ™ C-16 (Celanese) or Cosmedia Guar ™ C 261 (Henkel KGaA), quaternized ammonium salt polymers, e.g. Mirapol ™ A-15, Mirapol ™ AD-1, Mirapol ™ AZ-1 from Miranol / US. Suitable silicone compounds are, for example, dimethylpolysiloxanes, methylphenylpolysiloxanes, cyclic silicones and also amino, fatty acid, alcohol, polyether, epoxy, fluorine and / or alkyl-modified silicone compounds. As superfatting agents, substances such as polyethoxylated lanolin derivatives, lecithin derivatives, polyol fatty acid esters, monoglycerides and fatty acid alkanolamides can be used, the latter also serving as foam stabilizers. Typical examples of fats are glycerides, waxes include beeswax, paraffin wax or microwaxes optionally in combination with hydrophilic waxes, eg. As cetylstearyl alcohol in question. As stabilizers metal salts of fatty acids such. As magnesium, aluminum and / or zinc stearate. As a pigment, for example, titanium dioxide comes into question. Biogenic active substances are understood as meaning, for example, plant extracts and vitamin complexes z. Suitable preservatives are, for example, phenoxyethanol, formaldehyde solution, parabens, pentanediol or sorbic acid. Dyes which may be used are those which are suitable and approved for cosmetic purposes, as described, for example, in the publication " Cosmetic Colorants "of the Dye Commission of the Deutsche Forschungsgemeinschaft, Verlag Chemie, Weinheim, 1984, pp. 81-106 are compiled. These dyes are usually used in concentrations of 0.001 to 0.1 wt .-%, based on the total mixture. The total amount of auxiliaries and additives may be 1 to 50, preferably 5 to 40 wt .-% - based on the means - amount.

Finally, the shaped soap products according to the invention may contain fragrances and other customary auxiliaries and additives in an amount of up to 5% by weight. Suitable auxiliaries are z. As binders or plasticizers. As such are z. As glycerol, Fettsäurepartialglyceride or fatty alcohols with 12-22 C-atoms.

Other auxiliaries are z. As dyes, antimicrobial agents, deodorant agents, pigments (TiO ₂ ), optical brighteners and complexing agents.

The preparation of the shaped soap products according to the invention can be carried out in the usual way for soaps. In this case, a base soap with a solids content of 25-50 wt .-% is first prepared from fatty acid and sodium hydroxide solution and concentrated to a solids content of 50-70 wt .-%. In this z. B. 60% basic soap may already be mixed with the talc, optionally also free fatty acid, an anionic surfactant and a complexing agent. Thereafter, the basic soap z. B. in a vacuum expansion dryer at 120 ° C to 130 ° C further dehydrated. During expansion, the soap spontaneously cools to temperatures below 60 ° C and solidifies. This fall soap noodles with a solids content of 73-85 wt .-% of.

The further processing of this basic soap is then the finishing of fine soap. It takes place in a soap mixer, in which a slurry of the anionic surfactant or surfactants, in particular acyl isethionate, and the other auxiliaries and additives is mixed into the soap noodles. The basic soap noodles and the slurry of or the anionic surfactants, in particular acyl isethionate, and z. As fragrances, dyes, pigments and other auxiliaries in a screw mixer with perforated screens intensively mixed and finally discharged via an extruder and optionally supplied to a piece press when soap bars are to be produced.

Shaped soap products according to the invention can also be present as noodles, needles, granules, extrudates, flakes and in any other usual for soap products shaping.

As an alternative to the process described, the talc may also be incorporated into the 73-85% basic soap only during the preparation. In this case, the talcum powder over suitable dosing, z. As belt scale and shaker dose simultaneously with the slurry from or the anionic surfactants, in particular acyl isethionate, perfumes and auxiliaries fed to the soap mixer.

The soap products according to the invention are characterized by a particularly smooth surface, which is particularly noticeable when processed into bar soap power. In use, it forms abundantly fine bubbles, creamy foam. Although lime soap precipitations form in hard water, they remain dispersed in the solution and do not strike on hard surfaces as greasy-gray spots or cheesy edges, but at best as light, finely divided veils.

The following examples are intended to illustrate the invention without limiting it. basic soaps Wt .-% sodium tallowate 67.80 Sodium cocoate / sodium palm kernel fatty acid salts 16.95 NaCl 0.40 EDTA 0.20 Natriumetidronat 0.09 glycerin 2.50 water ad 100.00 example 1 Wt .-% sodium cocoyl 31.00 stearic acid 23.00 basic soaps 11.00 Disodium lauryl 8.00 coconut 3.00 paraffin 2.00 Polyethylene glycol-150 2.00 talc 5.00 TiO ₂ 0.50 panthenol 0.15 Wool alcohol 0.10 water ad 100.00

The basic soap noodles are dosed with the other components in a conventional soap mixer (screw mixer with perforated sieve), homogenized by repeated mixing, discharged via an extruder, cut and processed in the usual way to pieces.

Claims (7)

1. Moulded soap product comprising

   - talc,

   - 5-40% by weight of a base soap, whose soap constituents are composed of sodium tallowate, sodium cocoate and sodium palm kernel fatty acid salt,

   - 5-30% by weight of free fatty acids with 12-22 carbon atoms

   - and one or more anionic surfactants

   - where alkyl (oligo)glycosides which conform to the formula R¹-O(G)_x, in which R¹ is a primary C₁₂-C₁₆-alkyl group and (G)_x is an oligoglycoside radical whose degree of oligomerization is x = 1 to 2, must at most be present in the mass on which the product according to the invention is based as impurities, and in any case must constitute less than 1% by weight.
2. Soap product according to Claim 1, characterized in that the anionic are selected from the group of acyl glutamates, acyl peptides, sarcosinates, taurates, acyl lactylates, alaninates, ester carboxlic aids, ether carboxylic acids, phosphoric esters and salts, sulphonic acids and salts, acyl isethionates, alkylarylsulphonates, alkylsulphonates, sulphosuccinates.
3. Soap product according to Claim 1, characterized in that the anionic are selected from the group of alkali metal acyl isethionates.
4. Soap product according to Claim 1, characterized in that it comprises 20-50% by weight of anionic surfactants, preferably alkali metal acyl isethionates, preferably sodium cocoyl isethionate.
5. Soap product according to Claim 1, characterized in that it comprises 1-20% by weight of talc.
6. Soap product according to Claim 1, characterized in that it comprises water in an amount of 5-35% by weight.
7. Soap product according to Claim 1, characterized in that it comprises up to 15% by weight of synthetic, catio