JP2665976B2 - Cosmetics - Google Patents

Description

The present invention relates to a free fatty acid having 18 to 22 carbon atoms and having two or more unsaturated bonds in a molecular structure, a salt thereof, and an ester thereof with a monohydric or dihydric alcohol. The present invention relates to a cosmetic composition stably containing

2. Description of the Related Art Fatty acids whose linoleic acid and linolenic acid have any of 18 to 22 carbon atoms and an unsaturated bond number of 2 or more in the molecular structure (hereinafter referred to as essential fatty acids) are essential substances for maintaining human health. . Such fatty acid deficiencies include dry scaly skin,
Loose hair or widespread erythema is known.

On the other hand, when such essential fatty acids are incorporated into cosmetics, the effects and effects of moisturizing, tyrosinase activity inhibiting, and hair-growth are conventionally known. However, these essential fatty acids are extremely unstable to air oxidation, and are often accompanied by discoloration and odor when incorporated into cosmetics.

Conventionally, ascorbic acid derivatives, tocopherols and the like have been used as such fatty acid antioxidants.
However, the effect is not always enough,
Discoloration and odor due to deterioration of the antioxidant itself also pose a problem.

An object of the present invention is to provide a cosmetic composition containing an essential fatty acid, a salt or an ester thereof, and having excellent oxidation stability.

Means for Solving the Problems The present invention provides (a) a free fatty acid having 18 to 22 carbon atoms and having two or more unsaturated bonds in the molecular structure, a salt thereof, or S-L with a monohydric or dihydric alcohol, and b) dibutylhydroxytoluene, butylhydroxyanisole, erythorbic acid, sodium erysorbate, nordihydroguaiaretic acid, propyl gallate,
One or more antioxidants selected from the group consisting of sage extract, rosemary extract, mace extract, (c) lecithin (d) phosphoric acid, phosphate, aliphatic oxypolyacid, An object of the present invention is to provide a cosmetic comprising one or more compounds selected from the group consisting of a salt or a monoester thereof and a carboxyvinyl polymer.

Fatty acids having 18 to 22 carbon atoms and having two or more unsaturated bonds in the molecular structure, such as linoleic acid and linolenic acid, contained in the composition of the present invention are contained in vegetable oils and fats.

Representative free fatty acids having 18 to 22 carbon atoms and an unsaturated bond number in the molecular structure of 2 or more which are blended in the cosmetic of the present invention include linoleic acid, linoleic acid, α-linolenic acid, γ -Linolenic acid, dihomo-γ-linolenic acid, arachidonic acid, eicosapentaenoic acid and the like, and one or more of these are used.

Examples of the salts of these free fatty acids include metal salts such as sodium salt and potassium salt, basic amino acid salts such as arginine salt and dilin salt, and amine salts such as triethanolamine salt and monoethanolamine salt.

Further, examples of the alkyl ester of the free fatty acid include an ester with a monohydric alcohol such as methanol, ethanol and isopropyl alcohol, and an ester with a dihydric alcohol such as ethylene glycol, propylene glycol and 1,3-butylene glycol. Can be

The amount of these free fatty acids, salts thereof or esters thereof in cosmetics is preferably 0.1 to 10% by weight. When the amount is less than 0.1% by weight, the effect is not obtained. On the other hand, when the amount exceeds 10% by weight, irritation is strong.

On the other hand, as antioxidants to be incorporated in the cosmetic of the present invention, dibutylhydroxytoluene, butylhydroxyanisole, erythorbic acid, sodium erysorbate, nordihydroguaiaretinic acid, propyl gallate,
One or more of sage extract, rosemary extract, and mace extract are used.

The content of these antioxidants in cosmetics is 0.
001-5.0% by weight. If the amount is less than this, the effect is not obtained. On the other hand, if the amount is more than this, deterioration of the essential fatty acid, its salt or ester may be accelerated. The effect of these antioxidants increases when used in combination with lecithin.

Next, typical examples of lecithin to be incorporated into the cosmetic of the present invention include soybean lecithin and egg yolk lecithin, and these may be appropriately hydrogenated or hydroxylated. These may be used alone or in combination of two or more.

The cosmetic of the present invention further comprises phosphoric acid or a salt thereof;
Aliphatic oxypolybasic acids, their salts or monoesters;
Alternatively, a carboxyvinyl polymer is used alone or in combination. By blending them, the effect of the antioxidant increases synergistically.

Examples of the phosphoric acid and salts thereof include phosphoric acid, sodium monohydrogen phosphate, sodium dihydrogen phosphate, trisodium phosphate, potassium monohydrogen phosphate, potassium dihydrogen phosphate,
Tripotassium phosphate and the like.

Examples of the aliphatic oxypolybasic acid include citric acid, gluconic acid, tartaric acid, malic acid and the like. These salts include monosodium citrate, disodium citrate, trisodium citrate, tripotassium citrate,
Examples include sodium gluconate, potassium gluconate, ammonium gluconate, monosodium tartrate, disodium tartrate, monosodium malate, disodium malate and the like. In addition, as the monoester, ethyl citrate, isopropyl citrate, ethyl tartrate,
Ethyl malate and the like.

Next, the results of testing the stability of the cosmetic of the present invention are shown in Table 1 below.

(Adjustment method) Linoleic acid, POE (60) hydrogenated castor oil, citric acid, dibutylhydroxytoluene, and hydrogenated lecithin were dissolved and mixed in 95% ethanol. On the other hand, 1,3-butylene glycol, decaglyceryl laurate, lecithin hydroxide,
Citrate or phosphate was dissolved in purified water and mixed.
Next, the alcohol phase was added to the aqueous phase and mixed well.
This was left in a constant temperature room at 40 ° C. for 2 months, and the residual ratio of linoleic acid was determined by high performance liquid chromatography.

The cosmetic of the present invention is produced in the form of a lotion, a cosmetic oil, a cream, a milky lotion, a pack, a powder or the like by a known method.

Further, the cosmetic of the present invention may be appropriately blended with known components within a range that does not impair the performance according to the type.

EXAMPLES Next, the present invention will be described more specifically with reference to examples.

Example 1 (Lotion) Ingredients% by weight linoleic acid 1.0 dibutylhydroxytoluene 0.05 Citric acid 0.05 polyoxyethylene hydrogenated castor oil (60E.O.) 1.0 Methyl parahydroxybenzoate 0.05 Ethanol 15.0 Glycerin 8.0 Potassium hydroxide 0.15 hydroxylated lecithin 0.1 Disodium hydrogen phosphate 0.5 Sodium tartrate 0.03 Purified water Rest Dissolve glycene, potassium hydroxide, lecithin hydroxide, disodium hydrogen phosphate and sodium tartrate in purified water. Separately, linoleic acid, dibutylhydroxytoluene, citric acid, polyoxyethylene hydrogenated castor oil (60E.O.) and methylparaben are dissolved in ethanol, added to the purified aqueous solution, solubilized, filtered, and filtered I got

Example 2 (Cream) (component (A)) Ingredient wt% .gamma.-linolenic acid 2.0 Bleached beeswax 4.0 Cetyl alcohol 2.0 Monoguriseriru stearate 1.0 ethyl linoleate 5.0 Lanolin 2.0 Liquid paraffin 9.0 self-emulsifying stearate 3.0 monostearate poly oxyethylene orbiviruses Tan (20E.O.) 1.5 propyl parahydroxybenzoate 0.1 dibutylhydroxytoluene 0.05 (component (B)) ingredient wt% soy lecithin 0.1 citric acid 0.05 malic acid 0.05 carboxyvinyl polymer 0.1 methyl parahydroxybenzoate 0.2 propylene glycol 5.0 Fragrance 0.2 Purified water Remainder Heat and dissolve component (A) and keep at 80 ° C. Separately, the component (B) excluding the fragrance is dissolved by heating and kept at 80 ° C., and the component (A) is added thereto with stirring and mixed well. Cooling was further performed with stirring, a flavor was added, and further cooling was performed to obtain a cream.

Example 3 (emulsion) (component (A)) Ingredient wt% ethyl arachidonic acid 0.2 Linoleic acid isopropyl 2.0 Squalane 5.0 Vaseline 2.0 Beeswax 1.0 Sorbitan sesquioleate 2.0 dibutyl hydroxytoluene 0.05 butylhydroxyanisole 0.05 (component (B)) formed min wt% polyoxyethylene oleyl ether (20E.O.) 2.5 ethyl parahydroxybenzoate 0.2 rosemary extract 0.05 1,3-butylene glycol 5.0 carboxyvinyl polymer 0.2 xanthan gum 0.3 sodium citrate 0.05 dipotassium hydrogen phosphate 0.5 hydrogenation Egg yolk lecithin 0.5 Flavor 0.2 Purified water Remaining ingredient (A) is dissolved by heating at 80 ° C and heated separately (80 ° C)
Add to the component (B) excluding the dissolved perfume with stirring and mix well. Then, the mixture was cooled with stirring, a fragrance was added, and the mixture was further cooled to obtain an emulsion.

Example 4 (pack) Ingredient wt% Rinoeraijin acid 3.0 vinyl acetate-styrene copolymer 10.0 polyvinyl alcohol 10.0 sorbitol 5.0 Titanium oxide 8.0 Kaolin 7.0 1,3-butylene glycol 8.0 Citric acid isopropyl 0.05 dibutylhydroxytoluene 0.05 Ethanol 12.0 Phosphorus Disodium hydrogen oxyoxide 0.5 Mace extract 0.01 Methyl parahydroxybenzoate 0.1 Lecithin hydroxide 1.0 DL-serine 0.05 Fragrance 0.2 Purified water Remaining Dissolve the flavor, Rinoelaidic acid, Methylparaben, Isopropyl citrate and Dibutylhydroxytoluene in ethanol. This is further added to a homogeneous mixture of vinyl acetate / styrene copolymer, polyvinyl alcohol, sorbite, titanium oxide and kaolin. Next, a solution in which 1,3-butylene glycol, disodium hydrogen phosphate, mace extract, lecithin hydroxide, and DL-serine are uniformly dissolved in purified water is added, heated to 70 ° C., uniformly mixed, and then cooled. I got a pack.

Effect of the Invention According to the cosmetic of the present invention, essential fatty acids, salts and esters thereof are stably compounded, and have desired effects such as moisturizing action and hair-growing action over a long period of time.

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location A61K 7/00 A61K 7/00 J

Claims (1)

(57) [Claims] (1) linoleic acid, linoleic acid, α
One or two or more compounds selected from the group consisting of linolenic acid, γ-linolenic acid and dihomo γ-linolenic acid, salts thereof, and esters with monohydric or dihydric alcohols; and (b) dibutylhydroxytoluene , Butylhydroxyanisole, erythorbic acid, sodium erysorbate, nordihydroguaiaretic acid, propyl gallate,
One or more antioxidants selected from the group consisting of sage extract, rosemary extract, mace extract, (c) lecithin, (d) phosphoric acid, phosphate, aliphatic oxypolybasic acid, And a compound comprising one or more compounds selected from the group consisting of a salt and a monoester thereof.