DE4328355A1 - Mild watery shaving preparations - Google Patents

Description

The invention relates to mild aqueous shaving preparations with egg content of alkyl and / or alkenyl oligoglycosides, fat acid monoglyceride sulfates and polyols and the use such mixtures for the preparation of the preparations.

State of the art

Conventional water-based shaving creams based on alkali soaps and glycerin show in terms of manufacturability as well as for use above normal temperature (20 ° C) significant problems. In the course of producing such Ra siercremes is usually a mixture of soda and Potassium hydroxide solution added to the melted fatty acid. This The process is referred to below as saponification. The ent standing alkaline soaps lead to gel formation, significant increase in the viscosity of the system is associated.

Overcoming the high shear forces in such a solidified way mixtures is no longer with conventional stirrers possible, but requires complex equipment measures.  

Another problem lies in the fact that Shaving creams that are saponified by vegetable or tieri shear fats are produced, usually alkaline are posed, causing irritation to sensitive skin can lead.

Shaving creams are mostly sold in tubes. At the An you press some cream on a damp Ra brush and then soap the body parts to be shaved. Conventional shaving creams have the disadvantage, however, that tem temperatures above room temperature, such as in Summer or hot countries occur to cement. This A lack of deformability, for example, causes spreading no longer possible from a tube.

There has been no lack of attempts in the past, Ra Provide preparations that are more or less free of the shortcomings mentioned. From EP-B1 0 070 074 (Procter & Gamble) are, for example, foaming surfactants Mixtures known that anionic in addition to alkyl oligoglucosides Surfactants with sulfate, sulfonate or carboxylate groups ent hold. The mixtures form stable foams and are suitable for example for shaving creams. The Japanese patent application JP 91/131 680 (Kao) relates to foaming compositions tongues containing alkyl oligoglycosides and one Blowing agent; on the use of this mixture in shaving foaming is indicated.

In practice, however, these lessons have also been learned proven unsatisfactory in technology: alkyl oligoglu Although cosides are known to be extremely skin-friendly,  for use in soap-free shaving creams, however neither the foaming power sufficient, nor the deformability given at higher storage temperatures. By mixing Alkyl oligoglucosides with those mentioned in EP-B1 0 070 074 Sulfate or sulfonate surfactants, for example alkyl sulfates, Alkyl ether sulfates, alkyl benzene sulfonates and olefin sulfona ten, the foam formation can be increased that the However, the matological tolerance of the preparations sig significant from; in addition, these mixtures also show no satisfaction formability.

The object of the present invention thus has stood to entice mild, pH-neutral aqueous shaving preparations wrap, both through improved ductility speed at temperatures up to 45 ° C as well as an advantage excellent foam properties. In addition, should these preparations should be homogeneous, as well as a good consistency and have an appealing shine.

Description of the invention

The invention relates to mild aqueous shaving preparations, containing

• a) 30-70 wt .-% alkyl and / or alkenyl oligoglycosides;
• b) 10-40 wt .-% fatty acid monoglyceride sulfates and
• c) 15-35% by weight of polyols with 3 to 6 carbon atoms and 2 up to 6 hydroxyl groups  - each based on the active substance content of the preparations - and, if appropriate, other customary auxiliaries and additives.

Surprisingly, it was found that the surfactants are found in the preparations according to the invention with regard to their foam assets and their skin-cosmetic tolerance synergis reinforce table. The proportion of Al according to the invention alkyl and / or alkenyl oligoglycosides, fatty acid monoglyceride sulfates and polyols is also achieved in that position of the shaving creams no undesirably high viscosity ten occur and the production with the help of simple stirrers is possible; homogenization as additional processing step can therefore be omitted. In addition, he will it is sufficient that the preparations are suitable even at temperatures do not cement over 30 to 40 ° C and easily ver let shape, for example, an application from a Tube is easily possible. Finally, the fiction moderate pH-neutral, homogeneous, have a beautiful sheen and a particularly creamy consistency.

From an application point of view, shavers are ideal Preparations proved that the components a) to c) in the contain the following quantities:

• a) 50-65 wt .-% alkyl and / or alkenyl oligoglycosides;
• b) 10-20% by weight of fatty acid monoglyceride sulfates and
• c) 10-30% by weight of polyols with 3 to 6 carbon atoms and 2 up to 6 hydroxyl groups

- each based on the active substance content of the preparations.

A particularly advantageous synergistic reinforcement of the  Property profile can be observed when you look at the compo nenten a) and b) in a weight ratio of 75:25 to 85: 15 begins.

Alkyl and / or alkenyl oligoglycosides

Alkyl and alkenyl oligoglycosides are known substances that according to the relevant procedures of preparative orga African chemistry can be obtained. Representative of the extensive literature is here on the EP- A1-0 301 298 and WO 90/3977. The alkyl and / or Alkenyl oligoglycosides follow the formula (I),

R¹-O- [Gl] _p (I)

in the R¹ for alkyl and / or alkenyl radicals with 6 to 22 Koh lenstoffatomen, G for a sugar residue with 5 or 6 coals atoms and p represents numbers from 1 to 10.

The alkyl and / or alkenyl oligoglycosides can differ from Al cans or ketoses with 5 or 6 carbon atoms, preferred way to derive the glucose. The preferred alkyl and / or Alkenyl oligoglycosides are thus alkyl and / or alkenyl olives goglucoside.

The index number p in the general formula (I) gives the oli Degree of gomerization (DP degree), d. H. the distribution of mono- and oligoglycosides and stands for a number between 1 and 10. Whilst p is always an integer in a given connection must be and assume here the values p = 1 to 6  is the value p for a particular alkyl oligoglycoside an analytically calculated quantity, most of the time represents a fractional number. Preferably alkyl and / or alkenyl oligoglycosides with a medium oligo Degree of merit p used from 1.1 to 3.0. From use From an nutritional point of view, such alkyl and / or alkenyl oligoglycosides preferred, their degree of oligomerization is smaller is 1.7 and is in particular between 1.2 and 1.4.

The alkyl or alkenyl radical R 1 can be derived from primary alcohols having 6 to 11, preferably 8 to 10, carbon atoms. Typical examples are butanol, capronalcohol, caprylic alcohol, capric alcohol and undecyl alcohol and their technical mixtures, such as those obtained, for example, in the hydrogenation of technical fatty acid methyl esters or in the course of the hydrogenation of aldehydes from Roelen's oxo synthesis. Alkyl oligoglucosides of the chain length C₈-C₁₀ (DP = 1 to 3) are preferred, which occur as a preliminary in the distillative separation of technical C₈-C₁₈ coconut oil alcohol and can be contaminated with a proportion of less than 6% by weight of C₁₂ alcohol and alkyl oligoglucosides based on technical C _9/11 oxo alcohols (DP = 1 to 3).

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

Fatty acid monoglyceride sulfates

Fatty acid monoglyceride sulfates are also known substances fe, which according to the relevant methods of preparative organic chemistry can be obtained. A preferred one Process for their preparation is monoglycerides or triglyceride / glycerol mixtures with gaseous sulfur sulfate trioxide [WO 92/09 569, WO 92/09 570 (Henkel)].

Fatty acid monoglyceride sulfates, which in the sense of the invention as Component b) come into question, follow the formula (II),

in the R²CO for an aliphatic acyl radical with 6 to 22 Carbon atoms and 0 and / or 1 to 3 double bonds and X for alkali and / or alkaline earth metal, ammonium, alkylammo nium or alkanolammonium.

Fatty acid monoglyceride sulfates are preferably used, whose fatty acid components are derived from coconut oil and 12 have up to 18, preferably 12 to 14 carbon atoms.  

Due to the manufacturing process, the monoglyceride sulfate can also be low Contain quantities of disulfate. The preferred counterion X is Na trium, ammonium or magnesium.

Polyols

As polyols with 3 to 6 carbon atoms and 2 to 6 hydroxyl groups For example, ethylene glycol, 1,2-propylene glycol, 1,3- Propylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,4- Butylene glycol, glycerin, erythritol, pentaerythritol, trimethy lolpropane, sorbitol, anhydrosorbitol, cyclohexanetriol, inositol be used. Propylene glycols and Glycerol alone or mixtures of these polyols with sorbitol and / or butylene glycol. As the polyol component, which keeps the shaving products moist, uses glycerin.

Auxiliaries and additives

The shaving preparations according to the invention can moreover contain other common auxiliaries and additives. Examples for this are perfume oils, superfatting agents such as cetyl alcohol, Lanolin, stearyl alcohol, lecithin, isopropyl myristate, vase line or paraffin oil; softening agents such as sodium meta sulfate or potassium etasulfate; Consistency regulators such as polyethylene lenglycols or their esters; Lubricants such as mineral oils; Sta bilisators such as methyl cellulose or polyvinyl pyrrolidone. By adding microbicidal substances, the Ra Protect animal preparations from microbial spoilage. The amount the optional auxiliaries and additives on the preparations  can be 0.5 to 10% by weight; the proportion of components a) to c) is reduced accordingly. All percentage ranges understand each other with the proviso that they are 100 Add% by weight.

The production of the shaving preparations according to the invention happens, for example, in such a way that the surfactant Ingredients as concentrates or aqueous solutions in one Mixing container submitted, heated with stirring and the polyol as well as any other ingredients and the rest Water metered in portions. The active substance content of Preparations can be 60 to 85, preferably 70 to 80% by weight carry.

Industrial applicability

The aqueous shaving preparations according to the invention are new in pH tral, foam-rich, even at higher storage temperatures malleable and have a particularly high skin cosmetic ver indolence. They can also be used without a viscosity pro Make and fill cream.

Another object of the invention therefore relates to Use of mixtures containing

• a) 30-70 wt .-% alkyl and / or alkenyl oligoglycosides;
• b) 10-40% by weight of fatty acid monoglyceride sulfates and
• c) 15-35% by weight of polyols with 3 to 6 carbon atoms and 2 up to 6 hydroxyl groups and

- each based on the active substance content of the preparations - and, if appropriate, other customary auxiliaries and additives for the production of aqueous shaving preparations.

The following examples are intended to be the subject of the invention explain in more detail without restricting it.

Examples I. Substances used

• *** Plantaren® APG 600. C _12/14 cocoalkyl oligoglucoside from Henkel KGaA, Düsseldorf / FRG. Average degree of oligomerization 1.3; 30% by weight aqueous paste.
• *** CMGS. C _12/14 coconut monoglyceride sulfate sodium salt from Henkel KGaA, Düsseldorf / FRG; 50% by weight aqueous paste.
• *** Texapon® N70. C _12/14 coconut fatty alcohol 2EO ether sulfate sodium salt from Henkel KGaA, Düsseldorf / FRG; 70% by weight aqueous paste.
• *** Cutina (R) F545. Fatty acid mixture from Henkel KGaA, Düsseldorf / FRG with the following C chain distribution: 51% C16: 0; 2% C17: 0; 44.5% C18: 0; 0.5% C18: 1; 2% <C16; the number after the colon indicates the Number of double bonds.
• *** Edenor® K12-18. Fatty acid mixture from Henkel KGaA, Düsseldorf / FRG with the following C chain distribution: 2% C10: 0; 52% C12: 0; 22% C14: 0; 12% C16: 0; 2% C18: 0; 9% C18: 1; 1% C18: 2.

II. Examples of application technology

Shaving creams were applied in accordance with the combination shown in Table 1 made in the following way: The content substances of the formulations R1 to R4 and R7 have been listed in the an given order at room temperature with stirring homogeneously mixed. The fatty acids were placed in a container and heated to 80 ° C. Glycerin and ge if necessary, sodium or potassium hydroxide solution added in portions, the mass became homogeneous. After adding the rest Water was allowed to cool and the perfume oil was metered in.

It turned out that

• *** The creams R1 to R4 according to the invention have no wide range let res with a simple stirrer, wuh rend a high for the comparison formulas R5 and R6 viscous viscous mass was created, which can only be used when ziell stirring and homogenization equipment and under large ßem energy expenditure was producible;
• *** The creams R1 to R4 according to the invention clearly higher base foam and greater foam stability than the comparison formulations had R5 and R6 (see Tab. 2);
• *** The creams R1 to R4 according to the invention a clear one better skin cosmetic tolerance than the Ver same formulations R5 to R7 had; and  
• *** The creams R1 to R4 according to the invention also at 45 ° C. were still easily deformable while the comparative re recipes R5 to R7 even at significantly lower temperatures temperatures had set in a putty-like manner (see Table 3). Under easily deformable it is understood that there is a Shaving cream easily by hand from a tube can push out.

Tab. 1

Composition of the shaving preparations in% by weight

The formulas R1 to R4 are according to the invention, the formulas R5 to R7 are used for comparison.  

IIa. Foaming power

The foaming power of the recipes became after the blow foam method determined according to DIN 53 902, Part B. The results Table 2 shows the base foam and foam breakdown quantified.

Tab. 2

Foaming power

IIb. Deformability

Tab. 3

Deformability

Claims (7)

1. Containing mild aqueous shaving preparations

• a) 30-70% by weight of alkyl and / or alkenyl oligoglycosides;
• b) 10-40% by weight of fatty acid monoglyceride sulfates and
• c) 15-35% by weight of polyols with 3 to 6 carbon atoms and 2 to 6 hydroxyl groups

- each based on the active substance content of the pre ready - as well as any other usual auxiliary and Additives. 2. Mild aqueous shaving preparations according to claim 1, characterized in that one uses alkyl and alkenyl oligoglycosides of the formula (I), R¹-O- [Gl] _p (I) in the R¹ for alkyl and / or alkenyl radicals with 6 to 22nd Carbon atoms, G stands for a sugar residue with 5 or 6 carbon atoms and p stands for numbers from 1 to 10. 3. Mild aqueous shaving preparations according to claims 1 and 2, characterized in that fatty acid monoglycid sulfates of the formula (II) are used, in which R²CO represents an aliphatic acyl radical having 6 to 22 carbon atoms and 0 and / or 1 to 3 double bonds and X represents alkali metal and / or alkaline earth metal, ammonium, alkylammonium or alkanolammonium. 4. Mild aqueous shaving preparations according to claims 1 to 3, characterized in that the polyol is glycerol starts. 5. Use of mixtures containing

• a) 30-70 wt .-% alkyl and / or alkenyl oligoglycosides;
• b) 10-40% by weight of fatty acid monoglyceride sulfates and
• c) 15-35% by weight of polyols with 3 to 6 carbon atoms and 2 to 6 hydroxyl groups

- each based on the active substance content of the pre ready - as well as any other usual auxiliary and Additives for the production of mild aqueous Ra preparations.