Cosmetic composition

Abstract: A cosmetic composition comprises (i) a water-soluble polyhydric alcohol having two or more hydroxyl groups and/or a lecithin and (ii) a bivalent metal salt of an organic acid.

Description: The present invention relates to the suppression of the stickiness in feeling in use of cosmetic compositions caused by the presence of water-soluble polyhydric alcohols and/or lecithins. The retention of moisture in the skin is an essential factor for keeping skin healthy, and numerous cosmetics and pharmaceuticals directed to moisture retention are available on the market. Active research is also under way on substances giving moisture retention, and numerous moisture retention agents have been proposed. Water-soluble polyhydric alcohols and lecithins are superior in water retention and moisture absorption and, therefore, they are widely used for cosmetics, pharmaceuticals, and the like. However, although these water-soluble polyhydric alcohols and lecithins have the superior action of keeping the skin healthy and of restoring rough skin to normal, they are considerably sticky in feeling in use, which is. a major problem in cosmetics, where the feeling in use desirably is good. In view of the above-mentioned situation, the present inventors engaged in deep and extensive research to obtain a cosmetic composition having a high moisture retention effect superior in feeling in use and, as a result, discovered that the stickiness in question can be suppressed by mixing in a bivalent metal salt of organic acid in a cosmetic composition including water-soluble polyhydric alcohols and/or lecithins. The present invention seeks to eliminate the above-mentioned disadvantages of the prior art and to provide a cosmetic composition having a superior moisture retention effect and excellent usability. JP-A-62-209010 discloses cosmetics preventing dry skin and providing moisture and elasticity. A typical skin lotion contains 5% 1,3-butylene glycol, 0.1% egg yolk lecithin, 0.01% pyrrolidone carboxylic acid, 1% sodium pyrrolidone carboxylate, 1% polyoxyethylene sorbitan monooleate, 10% ethanol, 0.1% methyl 4-hydroxybenzoate, 0.003% hyaluronic acid, 0.65% NaCl, 0.014% KCl, 0.012% CaCl 2 , 0.02% NaHCO 3 , 0.04% glucose, and water to 100%. EP-A-0,008,171 discloses hair and scalp treatment compositions. A typical composition comprises 18% mineral oil, 5% glycerol, 0.5% egg lecithin, 2% polyvinylpyrrolidone, 2% stearic acid, 2% histidine, 1.5% lanolin, 1.5% inositol, 1% isopropyl myristate, 1% Arlacel-83, 1% p-aminobenzoic acid, 0.5% methionine, 0.5% folic acid, 0.4% zinc sulphate, 0.2% magnesium sulphate, 0.1% methyl p-hydroxy benzoate. NaOH to pH 6.5-7.5, and water to 100%. JP-A-55-9046 discloses compositions useful as cosmetics bases for skin application comprising 0.01-1% of a chondroitin sulphate or its salt, 0.005-1% of gelatin, 1-30% of a polyhydric alcohol and at least 50% of water. The compositions may contain 0.01-1% of vitamin B 6 , 0.01-1% of glutamic acid or its salt, and proper amounts of Ca ions, phosphate ions, cholesterol, lecithin etc. The present invention provides the use of at least one bivalent metal salt of an organic acid in an amount of 0.001 to 5% by weight to suppress the stickiness in feeling in use of a moisture-retentive cosmetic composition comprising from 5 to 40% by weight of at least one water-soluble polyhydric alcohol having at least two hydroxyl groups per molecule and/or from 0.001 to 5% by weight of at least one lecithin, all percentages being based on the total weight of the cosmetic composition. The water-soluble polyhydric alcohols usable in the present invention have two or more hydroxyl groups in a molecule and include, for example, those containing two hydroxyl groups such as propylene glycol, dipropylene glycol, tripropylene glycol, other propylene glycols, 1,3-butylene glycol and 1,4-butylene glycol, and those containing three or more hydroxyl groups such as glycerol, diglycerol, triglycerol, tetraglycerol, other polyglycerols, maltose, maltitose, sucrose, fructose, xylitol, sorbitol, maltotriose, threitol, erythritol, amylolyzed sugars, and reduced alcohol sugars. The polyhydric alcohols may be used alone or in any mixture thereof. In particular, a more remarkable effect can be obtained in connection with a cosmetic composition containing a polyhydric alcohol containing three or more hydroxyl groups in a molecule. The amount of the water-soluble polyhydric alcohol containing two or more hydroxyl groups in a molecule used in the present invention is 5 to 40% by weight of the total amount of the cosmetic material. Especially, the effect of the present invention is remarkable in a cosmetic composition when the. amount of the water-soluble polyhydric alcohol is within the range of 10 to 30% by weight. When the amount is less than 5% by weight, a sufficient moisture retention effect cannot be obtained and when the amount is over 40% by weight the stickiness cannot be sufficiently suppressed. The lecithins usable in the present invention include, of course, lecithins extracted from egg yolk and plants (e.g, soybean, corn, cottonseed, rapeseed) and also include lecithins obtained by purifying those lecithins and the hydrogenation products thereof. In the present invention, one or more types of the above-mentioned lecithins may be suitably selected and used. The amount of the lecithin used in the cosmetic composition according to present invention is 0.001% to 5% by weight, preferably 0.01 to 2% by weight, of the total amount of the cosmetic composition. When the amount is less than 0.001% by weight, the desired effect is not sufficiently exhibited and when the amount is more than 5% by weight, the resultant cosmetic composition is not preferable in terms of the odor. Examples of the organic acids for the bivalent metal salts of the organic acids usable in the present invention are amino acids such as aspartic acid and glutamic acid, pyrrolidonecarboxylic acid, lactic acid, citric acid, malic acid, tartaric acid, malonic acid, succinic acid, glutaric acid, fumaric acid and maleic acid. Examples of the bivalent metal are calcium and magnesium. The amount of the bivalent metal salt of the organic acid in the present invention is 0.001% by weight to 5% by weight, preferably 0.003% by weight to 3% by weight, in the total amount of the cosmetic composition. When the amount is less than 0.001% by weight, the effect of suppressing the stickiness is not sufficient. The cosmetic compositions, in addition to the above-mentioned essential components, may also optionally include any cosmetic components in such amounts that the effect of the present invention is not impaired. Examples of other components conventionally used for cosmetic compositions are oil components (e.g. macademia nut oil, corn oil, olive oil, castor oil, jojoba oil, bees wax, fluid paraffin, squalane, petrolatum, micro crystalline wax, isopropyl myristate), surfactants (e.g. polyoxyethylene castor oil, sorbitane fatty acid esters, glycerine fatty acid esters, polyoxyethylene sorbitan fatty acid, polyoxyethylene glycerine fatty acid, triethanol amine salt of stearic acid, potassium salt of oleic acid), ultraviolet absorbants (e.g. N.N-dimethyl PABA octyl ester, octyl methyl cinnamate, butyl methoxydibenzoylmethane, glyceryl di-p-methoxycinnamic acid-mono-2-ethyl hexanoic acid, 2-hydroxy-4-methoxy benzophenone, 2-hydroxy-4-methoxy benzophenone-5-sodium sulfonate), lower alcohols (e.g. ethyl alcohol, isopropyl alcohol), preservatives (e.g. methyl paraben, ethyl paraben, propyl paraben, butyl paraben, phenoxy ethanol), bactericides (e.g. chlorohexidine hydrochloride, trichlorocarbanilide, triclosan, zinc pyrithione), coloring agents (e.g. dyes, pigments), powders, perfumes (e.g. essential oils, perfume of animal origin, synthetic perfume), medicines (e.g. vitamin A and its derivatives, vitamin E and its derivatives, vitamin C and its derivatives, pantothenic acid, vitamin H, vitamin B and its derivatives), water-soluble polymers (e.g. poly vinyl alcohol, polyvinylpyrrolidone, carboxy vinyl polymer, xanthan gum, Hyaluronic acid), buffer agents (e.g. sodium glutamate, arginine, aspartic acid, citric acid, sodium citrate, lactic acid, sodium lactate). Further, the present invention may be applied in any way, i.e., may be used for tonics, lotions, emulsions, creams, and other basic cosmetic compositions and also foundations and other makeup cosmetic compositions, hair treatments, and other hair cosmetic compositions. The cosmetic compositions containing polyhydric alcohols having two or more hydroxyl groups in a molecule and/or lecithins are superior in moisture retention effect and the additional presence of the bivalent salt of an organic acid suppresses the stickiness in feeling in use caused by water-soluble polyhydric alcohols and/or lecithins so that the usability such as the suppleness given and affinity is improved. Further, the present cosmetic composition is excellent in stability and safety. EXAMPLES The present invention will now be further illustrated in detail by, but is by no means limited to, the following Examples, wherein "percents" are all by weight unless otherwise noted. The evaluation was carried out as follows. Moistness and Lack of Stickiness The sample prepared was used by a panel composed of 10 experts for an organoleptic test. The results are evaluated as follows: o ○: Eight or more out of 10 members answered good o : Six or more out of 10 members answered good Δ : Four or more out of 10 members answered good x : Less than four out of 10 members answered good. Example 1 and Comparative Examples 1 to 4 Softening lotion was produced by an ordinary method by the formula shown in Table 1. Component Ex. 1 Comp. Ex. 1 Comp. Ex. 2 Comp. Ex. 3 Comp. Ex. 4 Purified water 74.38 89.88 77.38 91.88 76.88 Glycerol 10.0 - 10.0 - 10.0 1,3-Butylene glycol 5.0 - 5.0 - 5.0 Lactic acid 2.0 2.0 - - - Calcium chloride 0.5 0.5 - - - Carboxyvinyl polymer 0.2 0.2 0.2 0.2 0.2 Ethanol 7.0 7.0 7.0 7.0 7.0 Polyoxyethylene (60 mol) hydrogenated castor oil 0.3 0.3 0.3 0.3 0.3 Purified lecithin 0.5 - - 0.5 0.5 Methyl paraben 0.1 0.1 0.1 0.1 0.1 Perfume 0.02 0.02 0.02 0.02 0.02 Moistness o ○ x o o o ○ Lack of stickiness o ○ o ○ x x x As clear from Example 1, the cosmetic composition of the present invention is superior in moisture retention effect and further is free from stickiness. Example 2: Nourishing Cream % (A) Cetyl alcohol 5.0 Stearic acid 3.0 Vaseline 7.0 Squalane 10.0 Isopropyl myristate 2.0 Glyceryl monostearate 3.0 Ethyl paraben 0.2 Hydrogenated lecithin 1.0 Perfume 0.2 % (B) Glycerol 20.0 L-glutamic acid 0.05 Lactic acid 0.1 Magnesium chloride 0.05 Purified water 48.2 Potassium hydroxide 0.2 Preparation method The oil phase portion (A) and the aqueous phase portion (B) were separately heated to 70 °C and completely melted, then the oil phase portion was mixed with the aqueous phase portion and emulsified by an emulsifier. The emulsion was cooled in a heat exchanger to a final temperature of 30°C to obtain a nourishing cream. Example 3: Moisture Emulsion % (A) Beeswax 1.0 Vaseline 2.0 Deodorized lanolin 1.5 Jojoba oil 6.0 Cetylisooctanoate 4.0 POE (60) hydrogenated castor oil 2.0 Purified lecithin 1.0 Ethyl paraben 0.2 Butyl paraben 0.1 Perfume 0.3 % (B) Dipropylene glycol 5.0 Sorbitol 10.0 Lactic acid 0.2 Citric acid 0.05 Calcium chloride 0.05 Magnesium chloride 0.1 Xanthane gum (tradename: Keltroll T) 0.05 Carboxyvinyl polymer 0.2 Purified water 66.15 Potassium hydroxide 0.1 Preparation method The moisture emulsion was prepared in the same manner as in Example 2. Example 4: Creamy Foundation % (A) Cetyl alcohol 3.5 Stearic acid 2.0 Deodorized lanolin 5.0 Squalane 8.0 Glyceryl monoisostearate 2.5 POE (10) behenyl ether 0.5 Yolk lecithin 2.0 Ethyl paraben 0.2 Butyl paraben 0.2 % (B) Diglycerol 3.0 Xylitol 5.0 Calcium lactate 2.0 Pyrrolidone carboxylic acid 0.1 Citric acid 0.1 L-arginine 0.5 Mixed powder 15.0 Purified water 50.15 Potassium hydroxide 0.25 Preparation method The foundation was prepared in the same manner as in Example 2. The cosmetic compositions of Examples 2 to 4 were superior in moisture retention and were not sticky.

Claims: The use of at least one bivalent metal salt of an organic acid in an amount of 0.001 to 5% by weight to suppress the stickiness in feeling in use of a moisture-retentive cosmetic composition comprising from 5 to 40% by weight of at least one water-soluble polyhydric alcohol having at least two hydroxyl groups per molecule and/or from 0.001 to 5% by weight of at least one lecithin, all percentages being based on the total weight of the cosmetic composition. The use as claimed in claim 1, wherein a water-soluble polyhydric alcohol selected from propylene glycol, dipropylene glycol, tripropylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, glycerol, diglycerol, triglycerol, tetraglycerol, maltose, maltitose, sucrose, fructose, xylitol, sorbitol, maltotriose, threitol, erythritol, amylolyzed sugars and reduced alcohol sugars is present in the cosmetic composition. The use as claimed in claim 1 or 2, wherein a water-soluble polyhydric alcohol is present in the cosmetic composition in an amount of 10% to 30% by weight, based on the total weight. The use as claimed in claim 1, wherein a lecithin selected from egg yolk lecithins and plant lecithins and the purified products thereof and the hydrogenation products thereof is present in the cosmetic composition. The use as claimed in claim 1 or 4, wherein a lecithin is present in the cosmetic composition in an amount of 0.001 % to 2% by weight, based on the total weight. The use as claimed in any of claims 1 to 5, wherein a bivalent metal salt of an organic acid is used selected from the calcium salts and the magnesium salts of aspartic acid, glutamic acid, pyrrolidonecarboxylic acid, lactic acid and citric acid. The use as claimed in any of claims 1 to 6, wherein the amount of the bivalent metal salt of the organic acid is 0.003% to 3% by weight, based on the total weight of the cosmetic composition.

Inventors: ITO KENZO, NISHIYAMA SHOJI, ITO, KENZO, NISHIYAMA, SHOJI, ITO, KENZO, C/O SHISEIDO LABORATORIES, NISHIYAMA, SHOJI, C/O SHISEIDO LABORATORIES
Applicants: SHISEIDO CO LTD, SHISEIDO COMPANY LIMITED
Application year: 1990
Main classification: A61K7
IPC codes: A61Q1, A61K8, A61Q9