DE2355965A1 - AEROSOL SHAVING CREAM - Google Patents

Description

The invention relates to aerosol shaving creams and methods for their production. In particular, the invention relates to aerosol shaving creams with a rich foam development which enable an easy, comfortable shave and lead to a smooth, soft skin feeling.

According to the invention, aerosol shaving creams are provided with a content on a shaving cream base, an aqueous medium, a foaming surfactant and an organic liquefied one Propellant gas proposed in a pressure vessel, which are characterized in that they improve the foam and Shaving properties in combination with a mineral oil, Contain lanolin and urea.

The shaving creams according to the invention lead to a smooth ^

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clean, comfortable shave and leave your skin feeling soft and cared for. These results have been made through in vivo tests compared to a known and considered excellent shaving cream.

The shaving cream mixtures according to the invention are contained in a pressurized can in which the mixture is under pressure and from which it can be removed by opening the valve. The mixtures contain an organic liquefied propellant gas, which keeps the mixture in the container under pressure and facilitates the delivery of the mixture, as well as an aqueous medium, an anionic foaming surfactant, a foam stabilizer and a mixture of mineral oil, lanolin and urea in such amounts that the finished shaving cream has about 0.25 to 1 % mineral oil, about 0.005 to 0.025 % lanolin and about 0.001 to 0.006 % urea. The shaving creams can also be made up as autogenously warming mixtures to soften the beard more quickly.

The main component of the shaving cream according to the invention is an aqueous medium in which the other components are present in dissolved, emulsified or dispersed form. The aqueous medium also often acts as a reaction medium and can partly take part in reactions, mainly in the neutralization of soap or synthetic organic substances

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Surfactant acids. If necessary, smaller amounts of solvents or solubilizers can also be present in this medium, such as, for example, dissolved salts usually present in very small amounts, but the aqueous medium preferably consists only or mainly of water. · Distilled or preferably demineralized water is usually used. The additional solvents optionally present in the aqueous medium generally make up no more than 20 % of the water content, mostly less than 10 % and preferably less than 5 % ; in most cases there are no other solvents present. If appropriate, lower alcohols with 1 to M carbon atoms and preferably with 2 to 3 carbon atoms, such as, for example, ethanol, can be added as solvents.

A surface-active foaming agent is used to generate foam Surfactant added. The foaming compounds are preferably anionic surfactants. Of these, the higher will be fat acid soaps are preferably used, in particular soaps containing a mixture of alkanolamine such as triethanolamine salts and alkali salts so that the soaps are water-soluble. At least some of the soaps should preferably an alkanolamine soap. The water-soluble soaps can be made by saponifying fatty acids, natural oils or fats or their mixtures are produced.

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The higher fatty acids contain about 12 to 18 carbon atoms. As the higher fatty acid soaps, mixed sodium, potassium and triethanolamine soaps of a mixture are preferably used from stearic acid, palmitic acid and coconut oil fatty acids used, i.e. that the higher fatty acid soaps are essentially saturated.

In addition to the higher fatty acid soaps, other synthetic anionic surfactants can be used. In certain cases these compounds can replace part of the soaps; The complete replacement of the soaps by these compounds is somewhat less favorable. The synthetic anionic surfactants generally have a higher, preferably linear aliphatic alkyl radical and a preferably terminally connected hydrophilic group, the latter usually being a sulfuric acid or sulfonic acid group which is present in salt form as an alkali metal salt, ammonium salt or lower di- or trialkanolamine salt, the lower alkanolamines ^{containing 1 to 1} J carbon atoms. Suitable anionic surfactants are higher alkyl sulfates, higher alkyl ^{sulfonates, higher alkyl benzene · 4} sulfonates, ethoxylated higher fatty alcohol sulfates, monoglyceride sulfates, higher fatty acid amides of lower aminocarboxylic acids such as sodium lauroyl sarcoside, the sulfates and phosphonates corresponding to the sulfates and sulfonates mentioned, as well as the sulfates and phosphonates of the phosphates and phosphonates known non-ionic surfactants such as

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the corresponding compounds of polyoxyethylene glycols, the block copolymers of ethylene oxide and propylene oxide with chain-terminated propylene glycol or the polyethoxylated phenols with middle alkyl chains. A detailed presentation of suitable anionic surfactants, for example, "Detergents and Emulsifiers", 1969, by McCutcheon and in "Surface Active Agents and Detergents", Volume II (1958) by Schwartz, Perry and Berch. Particularly suitable Anionic surfactants are, for example, triethanolamine lauryl sulfate, sodium n-dodecyl benzenesulfonate, potassium coconut oil monoglyceride sulfate, Ammonium paraffin sulfonate and ammonium polyoxyethylene stearyl alcohol sulfate.

The mixtures according to the invention preferably contain one or more foam stabilizers. Suitable connections are for example organic gums or colloids, which act as thickeners and thereby keep the foam in keep the applied shape. The lower alkanolamides are also often preferred for this purpose higher fatty acids used. A particularly suitable compound is lauric acid myristic acid diethanolamide which the fatty acids as a mixture of lauric acid and myristic acid usually in amounts of about 1: 3 to 3: 1 are preferably present in amounts of 1: 1. So this material is actually a mixture of two different ones Diethanolämiden, but for the sake of simplicity it is usually called lauric acid-myristic acid-diethanolamide

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or LMDEA. Can be used as foam stabilizers other dialkanolamides of higher fatty acids can also be used, such as, for example, diethanolamides of higher, preferably saturated fatty acids with 12 to 18 carbon atoms or such mixed fatty acids. Preferred fatty acids are lauric acid, myristic acid, palmitic acid or Stearic acid used. The lower alcohols can contain 1 to 4, usually 1 to 5 and preferably 2 to 3 carbon atoms, such as ethanol and isopropanol. If necessary, it can also be used with somewhat less effectiveness the corresponding monoethanolamides are used. In these compounds fatty acid and lower alcohol can be the same or different. Other suitable foam stabilizers are for example monoethanolamides of coconut oil fatty acids, hydrogenated tallow fatty acid diisopropanolamide, Lauric acid di-n-propanolamide or stearic acid monoethanolamide. These stabilizers can be mixed with known thickeners, such as natural or synthetic organic Gums are mixed, e.g. with carageenan, tragacanth, alginates, gelatine, sodium carboxymethyl cellulose, Polyvinyl alcohol or polyvinyl pyrrolidone. A further stabilization of the foam can be found in the Achieve mixtures according to the invention by adding short-chain diols and / or triols. Effective are glycerine and 'preferably propylene glycol; possibly sorbitol can also be added.

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Propellant gases are added to keep the mixture under pressure in the container and to facilitate spraying. Numerous such compounds are known in the aerosol industry, such as carbon dioxide, nitrogen, nitrogen oxide, argon, air or other inorganic or inert gases; To achieve the uniformly foaming shaving creams according to the invention, however, liquefied lower hydrocarbons or lower halogenated hydrocarbons are preferably used, which are emulsified into the aqueous phase with the aid of the foam-forming compounds. Hydrocarbons with 1 to H C atoms, namely non-halogenated hydrocarbons mostly with 3 to 4 C atoms and halogenated hydrocarbons with 1 to 3 C atoms, are preferably used. Suitable hydrocarbons are η-butane, iso-

butane and propane; preferably a mixture of isobutane and propane in a ratio of 80 to 90 parts iso- ' butane and 10 to 20 parts of propane, ie at a preferred ratio of about 7: 1 ». The halogenated Hydrocarbons preferably contain fluorine and / or chlorine as halogen. Suitable connections are e.g. monochlorotrifluoromethane, dichloro-difluoromethane, Trichlor-difluoro-ethane, Diehlor-tetrafluoro-ethane, Monochloro-tetrafluoro-ethane, trichloro-monofluoro-methane, Tetrachloro-difluoro-ethane or similar chlorofluorocarbons with 1 to 3 carbon atoms in the molecule. The halogenated hydrocarbons and the non-halogenated ones Hydrocarbons are mostly used in mixtures,

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if appropriate, mixtures of halogenated and non-halogenated hydrocarbons can also be used. The mixtures are mostly used to regulate the developing pressure, the solution properties, the emulsion formation and the like and to regulate the corrosion prevent. The pressure developed by suitable mixtures is about 0.7 to 7 kg / cm, mostly about 1.4 to 4.9 or

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2.1 to 4.2 kg / cm, and preferably about 3 »5 kg / cm overpressure. Compounds are often used in the propellant mixture, one of which has an equilibrium pressure at room temperature of over 2.1 kg / cm overpressure and one at

Room temperature a pressure of less than 2.11 kg / cm overpressure developed, with mostly larger amounts of the latter compound being used. "If necessary, other Mixtures can be used.

To achieve certain desired properties, the shaving creams according to the invention can contain numerous other auxiliaries in addition to the ingredients mentioned, such as perfumes, dyes, other emollients, solvents, emulsifiers, suspension aids, buffers, skin care products, antioxidants, bactericides or proteins. In general, the total content of such additives is less than 10 % of the mixture, mostly less than 5 % and often less than 1 %. The pH value of the shaving cream is usually kept in the range from 5 to 10.5 and preferably from 7 to 10.5; this pH setting can be achieved by adding buffers or by

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determination of the content of acids and bases.

The foaming shaving creams according to the invention contain about 70 to 1/2 % water, 5 to 15 % anionic foaming surfactants, 0.5 to 3 % foam stabilizers and about 1 to 10 % propellants. The mixtures preferably contain about 75 to 85 % water, 7 to 13 % mixed higher fatty acids, 0.7 to 1.5 % dialkanolamides of higher fatty acids and 2 to 7 % of a propellant mixture. In some cases, about 1 to 5 % of another foam stabilizer and emollient such as propylene glycol and small amounts such as propylene glycol and small amounts such as 0.1 to 0.5 % of another emollient such as coconut oil can be added * Der The content of perfume, which is usually a mixture of animal oils, perfume aldehydes, ketones and suitable solvents and fixatives, is usually 0.1 to 3 % .The ratio of propellant gas with high vapor pressure to propellant gas with low vapor pressure in the propellant gas mixture is usually below 1 . ·

Surprisingly, it was found that the invention Foam-improving mixture of mineral oil, lanolin and urea when added in the specified amounts results in thicker foam than when larger or smaller amounts are added. Imagine within the specified limits Product with an improved, thicker and richer foam, while exceeding the specified amounts

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thin, flowing product is created.

The invention is explained in more detail below with reference to the examples. Unless otherwise stated, all refer to Parts and percentages based on weight.

example 1

From the following ingredients in the specified quantities a shaving cream was made:

Components more preferred more preferred salary Area in % water 84.086 70-90 Stearic acid (double pressed) 6.380 3-15 Stearic acid (triple ge 0.440 3-15 presses) Triethanolamine 0.128 0.05-3 NaOH (38 pound solution) 0.430 g.s. KOH (45.4% solution) 2,300 g.s. Lauric acid myristic acid 0.890 to 4 diethanolamide Propylene glycol 2.710 until 5 white mineral oil, extra light 0.550 0.25-1 lanolin 0.010 0.005-0.025 urea 0.003 0.001-0.006 Coconut oil 0.220 to 3 Coconut fatty acid 0.890 until 5 Diamronium phosphate 0.020 until 1 Oxyquinoline sulfate 0.001 until 1 1-menthol 0.022 until 1 Methylparasept 0.018 until 1 Propylparasept 0.002 until 1 FD & C Red No. 3 (left solution) 0.150 up to 2 Perfume 0.750 to 3

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The fatty acids react with the bases to form soaps.

198.5 parts of this mixture and 5 »7 parts of a mixture 80 parts of isobutane and 20 parts of propane were then dispensed into a valved aerosol container. About education To improve an emulsion, the containers were shaken. After packing, the containers were then transportable and Consumable.

The aerosol can is gently shaken before use, "Then the valve is pressed down so that through the dispensing nozzle the desired amount of foam escapes «The foam results in a moister, more comfortable and cleaner shave and leaves the skin feeling soft, smooth, relaxed and cared for.

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Claims (5)

Claims Γΐ) Aerosol shaving creams with a content of a shaving cream base mixture, a aqueous medium, a foaming surface-active compound and a liquefied organic propellant gas in one with one Valve equipped pressurized can, characterized by a content of mineral oil, lanolin and urea in combination to improve the foam and shaving properties. 2. Aerosolrasiercreme according to claim 1, characterized by a content of about 0.25 to 1 wt.% Mineral oil, about 0.005 to 0.025 wt. £ lanolin and about 0.001 to 0.006 wt.% Urea, based on the weight of the Rasiercremegrundmischung. 3. Aerosolrasiercreme according to claim 2, characterized by a content of about 70 to 90 wt.% Of water in aqueous medium, about 5 to 15 wt.% Of a higher fatty acid soap as a foam-forming compound and about 1 to 10 wt.% Of a propellant gas. ¹ year aerosol shaving cream according to claim 3, characterized by a content of up to about 4 wt.% Of a higher fatty acid alkanolamide. 409821/1 139 5. aerosol shaving cream according to claim 3 _S, characterized in that a mixture of sodium, potassium and triethanolamine soaps is contained as higher fatty acid soaps. ue: si: cm 409821/1139