NO883773L - CONSERVED HAIR AND BODY CLEANER SAAVEL AS USING A CONSERVATOR COMBINATION. - Google Patents

Description

Hair and body cleansers usually contain a preservative that will effectively protect the products against attack by microorganisms.

For use in hair and body cleansers, opposite requirements are placed on a preservative. Thus, on the one hand, it must be well compatible in physiological and dermatological terms and, on the other hand, have a good germ-inhibiting or even germ-killing effect. Both requirements are mostly only difficult to reconcile with each other.

As commonly used preservatives in hair and body cleansers, for example, formaldehyde, 5-bromo-5-nitro-1,3-dioxane, p-hydroxybenzoic acid ester, 2,4,4'-trichloro-2'-hydroxydiphenyl ether, 5-chloro- 2-methyl-3-isothiazolone, 2-methyl-3-isothiazolone and 2-bromo-2-nitropropane-1,3-diol are mentioned.

In recent times, certain preservatives, such as

for example, formaldehyde and 2-methyl-3-isothiazolone, have been suspected of not being sufficiently compatible. For aldehydes and phenols that have a preservative effect, it is known that these react with proteins and interact with them in a denaturing way. With aldehydes, there is also the risk of sensitization.

In the literature, formic acid and salicylic acid are already described as preservatives. Admittedly, they have not yet found use in hair and body cleansers. The salicylic acid alone does not have a sufficient preservative effect in low concentrations, while an undesirable keratolytic effect occurs in higher concentrations. Formic acid is an unpleasant pungent smelling acid with a strong corrosive effect. A further reason why formic acid is not used as a preservative in hair and body cleansers is to go back to their low pH value, at which a hydrolysis of the alkyl ether sulphates that are usually used in hair and body care products such as surfactants already occurs.

The task therefore consisted of providing a hair and body cleanser containing a preservative combination, which has a good preservative effect and exhibits better compatibility than usual preservatives used in such agents.

Thus, it was found that an aqueous hair and body cleanser with a content of from 3 to 50% by weight of a surfactant, characterized in that it contains a combination of

(A) a physiologically compatible salt of formic acid,

(B) salicylic acid or its physiologically compatible salt and (C) a physiologically unacceptable inorganic or aliphatic

organic acid,

It solves the task in an outstanding way.

The agent according to the invention is preserved very well with the help of the combination of preservatives described above and exhibits very good compatibility.

The quality of the preservation of the above-described hair and body cleansers was determined using the preservation stress test described in the literature The United States Pharmacopeia, 21st edition, (1985), page 1151. Thereby, the hair treatment agents were contaminated with the microorganisms Candida albicans (ATCC no . 10231), Aspergillus niger (ATTC No. 16404). Escherichia coli

(ATCC No. 8739), Pseudomonas aeruginosa (ATCC No. 9027) and Staphylococcus aureus (ATCC No. 6538) and the development of the bacterial count monitored over a period of 28 days.

While the use of sodium formate or salicylic acid both alone, especially in the case of attacks by fungi, such as Aspergillus niger, does not lead to satisfactory preservation of the hair and body cleansers, the products are very well preserved, also against fungi, when the combination described above is used of the preservatives (A), (B), and

(C) .

As suitable physiologically compatible salts of formic acid

(A) for example, the sodium formate, the ammonium formate, the potassium formate and the magnesium formate must be mentioned, whereby

the sodium formate is preferred.

In the hair and body cleansers, the component (A) is contained in an amount of from approx. 0.01 to 2% by weight, preferably from 0.1 to 1.0% by weight.

The component (B) is contained in an amount of from approx.

0.05 to 2% by weight, preferably from 0.1 to 1.0% by weight, in

the agent according to the invention, whereby above all an alkali salicylate or ammonium salicylate, especially sodium salicylate, is suitable as a salt of salicylic acid.

As physiologically harmless aliphatic organic acid for the component (C), aliphatic organic acids with 2 to 6 carbon atoms which are free of amino or halogen substituents, such as citric acid, tartaric acid, lactic acid, adipic acid, maleic acid, glyoxylic acid, gluconic acid, are preferably used and malic acid, in consideration of which citric acid is preferred, while preferably phosphoric acid is used as inorganic acid for component (C).

The component (C) is contained in the new agents in an amount of from approx. 0.1 to 1.5% by weight, preferably from 0.25 to 0.5% by weight.

With the component (C), the pH value of the hair and body cleanser is regulated, which is from 2.0 to 7.0, preferably from 4.8 to 5.8.

The hair and body cleanser according to the invention is preferably in the form of an aqueous solution or emulsion and contains, in addition to the combination of (A), (B) and (C) at least one anionic, cationic, non-ionic or amphoteric surfactant in an amount of from approx. . 3 to 50% by weight, preferably from 10 to 25% by weight.

Among the surfactants that are suitable for the new hair and body cleanser, the following should be mentioned, for example: a) the anionic surfactants f such as, for example, the alkali, alkaline earth, ammonium or alkanolamine salts of alkane sulphonates, alkyl sulphates and alkyl ether sulphates, The C12 to C18 alkyl and especially C12 to C14 alkyl sulfate sodium salts or triethanolamine salts, the sodium or triethanolamine salts of lauryl or tetradecyl ether sulfates, the disodium salt of sulfosuccinic half-esters of alkanolamides, the sapenes and the polyether carboxylic acids; b) the non-ionic surfactants, such as oxyethylated fatty alcohols with 12 to 18 carbon atoms, for example with up to 40 mol of ethylene oxide per moles of fatty alcohol oxyethylated lauryl, tetradecyl, cetyl, oleyl and stearyl alcohol, alone or in mixture; the fatty alcohols of oxyethylated lanolin or oxyethylated lanolin; polyglyceryl ethers of saturated or unsaturated fatty alcohols and alkylphenols with 8 to 30 carbon atoms in the alkyl residue and 1 to 10 glyceryl units in the molecule; fatty acid alkanolamides as well as oxethylated sorbitan fatty acid esters; c) the cationic surfactants, such as the dilauryldimethylammonium chloride, alkyldimethylbenzylammonium chlorides or bromides, the alkyltrimethylammonium salts, for example cetyltrimethylammonium chloride or bromide, tetradecyltrimethylammonium chloride or bromide, the alkyldimethylhydroxyethylammonium chlorides or bromides, the dialkyldimethylammonium chlorides or bromides, alkylpyridinium salts, for example lauryl or cetylpyridinium chloride, the alkylamidoethyltrimethylammonium ether sulphates, the imidazoline derivatives, compounds with a cationic character, such as amine oxides, for example alkyldimethylamine oxides or alkylaminoethyldimethylamine oxides, d) the amphoteric or zwitterionic surfactants, such as the carboxyl derivatives of imidazole, the N-alkyl betaines, N the -alkylaminobetaines, the N-alkylsulfobetaines, the N-alkylaminopropionates, the alkyldimethylammonium acetates, to the C^g-alkyldimethylcarboxymethylammonium salts as well as the fatty acid alkylamidobetaines, for for example dimethylcarboxymethylenepropyleneamido-stearate betaine.

Of course, the agent according to the invention can, in addition to the aforementioned ingredients, also contain common cosmetic additives, for example perfume oil in an amount of from approx. 0.5 to 5.0% by weight, bleaching agents, such as ethylene glycol distearate, in an amount of from approx. 0.5 to 5.0% by weight, nacreous agents, such as a mixture of fatty acid monoalkylolamide and ethylene glycol distearate, in an amount of from approx. 1.0 to 10.0% by weight, thickeners, such as for example coconut fatty acid diethanolamide, in an amount of from approx. 0.5 to 10.0% by weight, diluents, such as for example 1,2-propylene glycol or ethoxylated sorbitan monolaurate,

in an amount of from approx. 0.5 to 5.0% by weight, puffing substances,

such as sodium citrate or sodium phosphate, in an amount of from approx. 0.1 to 0.0% by weight, solubilizing agents, such as, for example, ethoxylated, possibly hydrogenated, castor oil, in an amount of from approx. 0.1 to 1.0% by weight, as well as dyes, such as, for example, fluorescein sodium salt, in an amount of from approx. 0.1 to 1.0% by weight, and also hair and skin care additives, such as fatty acid esters, fatty alcohols, fatty acid glycerides, ethoxylated propoxylated saturated fatty alcohols, cellulose derivatives, cationic cellulose derivatives, chitosan, cationic chitin derivatives, lanolin derivatives, cholesterol and pantothenic acid in an amount of from approx. 0.1 to 10% by weight, and also physiologically compatible inorganic salts, such as sodium chloride, as well as also humectants, light-protecting agents, antioxidants, complex-forming and anti-flaking agents.

Additional common ingredients known to such agents and which may be contained in the new agent are described, for example, by H. Janistyn, "Handbuch der Kosmetika und Riechstoffe", Volume 3, (1973), pages 228 - 284 and 442 -462, K. Schrader, "Grundlagen und Rezepturen der Kosmetika",

(1979), pages 375-401 and 445-455, as well as G.A. Nowak, "Die kosmetischen Preparate", (1984), pages 452 - 512.

The following examples shall further describe the object of the invention without limiting it to these.

Hair and body cleanser

Example 1: Hair cleanser

The above hair cleanser whose pH value is adjusted with citric acid to from 5.0 to 5.8 is very well preserved and excellently compatible.

Example 2: Hair cleanser

The above hair cleanser, whose pH value is adjusted to from 5.0 to 5.8 with phosphoric acid, is very well preserved and well compatible.

Example 3: Mild body cleanser

The above body cleanser whose pH value is adjusted with citric acid to from 5.0 to 5.8 is very good

preserved and excellently conciliatory.

All percentages in this application represent percentage by weight if nothing else is stated.

Claims (9)

1. Aqueous hair and body cleanser with a content of from 3 to 50% by weight of a surfactant, characterized in that it contains a combination of (A) a physiologically compatible salt of formic acid, (B) salicylic acid or its physiologically compatible salt and (C) a physiologically acceptable inorganic or aliphatic organic acid. 2. Means according to claim 1, characterized in that the component (A) is the sodium formate. 3. Agent according to claims 1 and 2, characterized in that the component (A) is contained in an amount of from 0.01 to 2.0% by weight, preferably from 0.1 to 1.0% by weight. 4. Agent according to claims 1 to 3, characterized in that the component (B) is contained in an amount of from 0.05 to 2% by weight, preferably from 0.1 to 1.0% by weight. 5. Agent according to claims 1 to 4, characterized in that it exhibits a pH value of from 2.0 to 7.0, preferably from 4.8 to 5.8. 6. Agent according to claims 1 to 5, characterized in that the component (C) is citric acid or phosphoric acid. 7. Agent according to claims 1 to 6, characterized in that the component (C) is contained in an amount of from 0.1 to 1.5% by weight, preferably from 0.25 to 0.5% by weight. 8. Agent according to claims 1 to 7, characterized in that the surfactant is an anionic surfactant. 9. Use of a combination of (A) a physiologically compatible salt of formic acid, (B) salicylic acid or its physiologically compatible salt and (C) a physiologically acceptable inorganic or aliphatic organic acid for the preservation of hair and body cleansers.