JPH08126831A - Emulsion composition - Google Patents

Abstract

PURPOSE: To obtain an emulsion composition excellent in emulsion stability with the lapse of time without using a surfactant by incorporating an alkyl modified carboxyl vinyl polymer and a higher alcohol having a specific carbon number and liquid at ordinary temp. CONSTITUTION: This emulsion composition is obtained by incorporating an alkyl modified carboxyl vinyl polymer and a 12-28C higher alcohol liquid at room temp. (25 deg.C). The alkyl modified carboxyl vinyl polymer used in this case is an acrylic methacrylic alkyl copolymer and its blending quantity is preferably 0.05-5wt.% in the emulsion composition. As the 12-28C higher alcohol liquid at room temp. (25 deg.C), tridecyl alcohol, isostearyl alcohol, hexyl decanol, octyl dodecanol, decyl tetradecanol, heptyl undecanol, oleyl alcohol, jojoba alcohol and the like are exemplified and its blended quantity is preferably 0.5-5wt.%.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emulsion composition, and more particularly to an emulsion composition excellent in long-term stability without using a surfactant.

[0002]

2. Description of the Related Art Conventionally, as an emulsion composition for cosmetics,
BACKGROUND ART Creams and emulsions obtained by emulsifying various oily and aqueous raw materials are widely used. In the production of such an emulsified composition, it is essential not only to treat the raw material under various conditions that are strictly set, but also to use a surfactant in order to guarantee the temporal stability of the emulsified composition. Was said. However, in recent years, even higher safety is expected for cosmetics, and from this viewpoint, the presence of a surfactant may be a problem. Therefore, a method for obtaining a cosmetic emulsion using a water-soluble polymer modified with an alkyl group without using a surfactant (Cosmetics & Toiletries, Vo
l.101, No.11, P125) and the like, but these emulsion compositions also have large emulsion particles and are not always sufficiently satisfactory in terms of long-term stability of the emulsion.

[0003]

That is, an object of the present invention is to provide an emulsified composition which is substantially free of a surfactant and has good emulsion stability over time.

[0004]

Means for Solving the Problems As a result of repeated studies to solve the above problems, the present inventors have found that by adding an alkyl-modified carboxyl vinyl polymer and a liquid higher alcohol, the emulsified particles are uniformly The present invention has been completed, and it was found that the long-term stability of emulsification is improved, and the present invention was completed.

That is, the invention according to claim 1 is an emulsified composition comprising an alkyl-modified carboxyl vinyl polymer and a higher alcohol having a carbon number of 12 to 28 and being liquid at room temperature (25 ^° C.). . Further, the invention according to claim 2 is characterized in that it does not substantially contain a surfactant. The invention according to claim 3 is characterized in that the content of the liquid higher alcohol is 0.5 to 5% by weight. The invention according to claim 4 is characterized in that the content of the oil component in the emulsion composition is 1 to 30% by weight. Further, the invention according to claim 5 is characterized in that silicone oil is contained in the oil component.

The alkyl-modified carboxyl vinyl polymer used in the present invention is an alkyl acrylate / methacrylic acid copolymer such as CARBOPOL 1342, PEMULEN TR-1,
Examples include those known under the trade name of PEMULEN TR-2 (BFGoodrich). The amount of the alkyl-modified carboxyl vinyl polymer blended is 0.01 to 10% by weight in the emulsion composition,
It is preferably 0.05 to 5% by weight. If it is less than 0.01%, it is difficult to emulsify, and if it exceeds 10%, the emulsifying action and the effect of improving the emulsion stability cannot be expected to increase. Further, from the viewpoint of usability, the range of 0.05 to 5% by weight is most preferable. In addition, a carboxylic vinyl polymer that is usually used as a thickener (for example, CARBOPOL 941 (BF
Goodrich), Hibiswako 105 (Wako Pure Chemical Industries, Ltd.), etc.)
Then, oil cannot be stably emulsified.

The higher alcohols having 12 to 28 carbon atoms and liquid at room temperature (25 ^° C.) used in the present invention include, for example, tridecyl alcohol, isostearyl alcohol,
Hexyl decanol, octyl dodecanol, decyl tetradecanol, heptyl undecanol, oleyl alcohol, jojoba alcohol and the like can be mentioned. The compounding amount is 0.1 to 10% by weight, preferably 0.5 to 5
% By weight. If it is less than 0.1%, the effect is not exhibited, and if it exceeds 10%, the emulsifying action and the effect of improving the emulsion stability cannot be expected. In addition, higher alcohols that are solid at room temperature do not show the effect of improving stability, such as the formation of seeds over time.

The oils used in the present invention include the following. As the liquid oil, linseed oil,
Camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, southern oil, castor oil, safflower oil, kyounin oil, cinnamon oil, jojoba oil, grape oil, sunflower oil, almond oil, rapeseed oil,
Sesame oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, tea seed oil, evening primrose oil, egg yolk oil, beef leg oil,
Liver oil, triglycerin, etc. Examples of the solid fats and oils include cacao butter, palm kernel oil, beef tallow, sheep fat, lard, horse fat, hydrogenated oil, hydrogenated castor oil, oak, and shea butter. As waxes, beeswax, candelilla wax, cotton wax,
Carnauba wax, bayberry wax, ivorot wax, whale wax, montan wax, nukarou, lanolin, reduced lanolin, hard lanolin, kapok wax, sugar cane wax, jojoba wax, shellac wax and the like.

Examples of ester oils include octanoic acid esters such as cetyl octanoate, lauric acid esters such as hexyl laurate, isopropyl myristate, myristic acid esters such as octyldodecyl myristate, palmitic acid esters such as octyl palmitate, and stearin. Acid stearate such as isocetyl acid, isostearate such as isopropyl isostearate, isopalmitate such as octyl isopalmitate,
Oleic acid esters such as isodecyl oleate, adipic acid diesters such as diisopropyl adipate, sebacic acid diesters such as diethyl sebacate, diisostearyl malate, and glyceryl trioctanoate, and polyhydric alcohol esters such as pentaerythritol tetraoctanoate. Etc. Hydrocarbon oils include liquid paraffin, ozokerite, squalane, squalene, pristane, paraffin, isoparaffin, ceresin, petrolatum, microcrystalline wax and the like. Examples of the silicone oil include chain silicones such as dimethylpolysiloxane, methylphenylpolysiloxane and methylhydrogenpolysiloxane, and cyclic silicones such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane. .

These oils are contained in the emulsified composition in an amount of 60% by weight.
It is blended below, preferably 1 to 30% by weight from the viewpoint of usability. If it exceeds 60% by weight, sufficient stability cannot be obtained even when an alkyl-modified carboxyl vinyl polymer and a higher alcohol having 12 to 28 carbon atoms and being liquid at room temperature are used together. In addition, among these oil components, when silicone oil is added, the elongation when applied to the skin etc. becomes lighter,
The feel at the time of use can be improved. It is preferable that 1 to 20% by weight of the silicone oil is blended in the oil.

In the emulsion composition used in the present invention, various raw materials usually used in cosmetics can be used as long as the effects of the present invention are not impaired. Examples of the lower alcohol include ethanol, propanol and isopropanol.
Examples of sterols include cholesterol, sitosterol, phytosterol, lanosterol and the like. Moisturizers include polyethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, hexylene glycol, glycerin, diglycerin, sorbitol, xylitol, maltitol, maltose, D-mannitol, erythritol, trehalose, water. There are candy, glucose, fructose, lactose, sodium chondroitin sulfate, sodium hyaluronate, sodium adenosine phosphate, sodium lactate, bile salt, pyrrolidone carboxylate, glucosamine, cyclodextrin and the like.

As the water-soluble polymer, gum arabic, tragacanth, galactan, carob gum, guar gum,
Plant-based macromolecules such as karaya gum, carrageenan, pectin, agar, quince seed (quince), starch (rice, corn, potato, wheat), algae colloid (brown algae extract), dextran, succinoglucan, pullulan, etc. Molecules, collagen, casein, albumin, animal-based polymers such as gelatin, carboxymethyl starch, starch-based polymers such as methyl hydroxypropyl starch, methyl cellulose, nitrocellulose, ethyl cellulose, methyl hydroxypropyl cellulose, hydroxyethyl cellulose, sodium cellulose sulfate, Hydroxypropyl cellulose, sodium carboxymethyl cellulose, crystalline cellulose,
Cellulose polymer such as cellulose powder, sodium alginate, alginate polymer such as propylene glycol alginate, polyvinyl methyl ether, carboxyvinyl polymer (CARBOPOL941 etc.), vinyl polymer, polyoxyethylene polymer, polyoxy Ethylene polyoxypropylene copolymer polymer, acrylic polymer such as sodium polyacrylate, polyethyl acrylate, polyacrylamide, polyethyleneimine, cationic polymer, bentonite, magnesium aluminum silicate, laponite, hectorite, silicic anhydride, etc. Inorganic water-soluble polymer, etc.

Examples of the ultraviolet absorbers include benzoic acid type ultraviolet absorbers such as paraaminobenzoic acid, anthranilic acid type ultraviolet absorbers such as methyl anthramylate, salicylate type ultraviolet absorbers such as octyl salicylate, phenyl salicylate and homomethyl salicylate, and paramethyl benzoate. Isopropyl methoxycinnamate, octyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, [4-bis (trimethylsiloxy) methylsilyl-3-methylbutyl ] -3,4,
Cinnamic acid-based UV absorbers such as 5, -trimethoxycinnamic acid ester, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2 -Hydroxy-4
-Benzophenone-based UV absorbers such as methoxybenzophenone-5-sodium sulfonate, urocanic acid, ethyl urocanate, 2-phenyl-5-methylbenzoxazole, 2- (2'-hydroxy-5'-methylphenyl) benzo Examples include triazole and 4-tert-butyl-4'-methoxydibenzoylmethane.

Examples of the sequestering agent include alanine, edetic acid sodium salt, sodium polyphosphate, sodium metaphosphate, phosphoric acid and the like. As a neutralizing agent, 2-amino-2-methyl-1-propanol, 2-amino-2-methyl
-1,3-Propanediol, potassium hydroxide, sodium hydroxide, triethanolamine, sodium carbonate and the like. Examples of pH adjusters include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, and salts thereof, potassium carbonate, sodium hydrogen carbonate, ammonium hydrogen carbonate and the like. Antioxidants include ascorbic acid, α-tocopherol, dibutylhydroxytoluene, butylhydroxyanisole and the like. As the antibacterial agent, benzoic acid, salicylic acid, carboxylic acid, sorbic acid, paraoxybenzoic acid ester, parachlorometacresol, hexachlorophene, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizer,
Examples include phenoxyethanol.

Examples of the drug include vitamin A oil, retinol, retinol palmitate, retinol acetate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinamide, DL-α-tocopherol nicotinate, magnesium ascorbate phosphate, vitamin D ₂ (Ergocasiferol), vitamin D ₃ , dl-α-tocopherol, acetic acid dl-α-tocopherol, pantothenic acid, vitamins such as biotin, hormones such as estradiol and ethinyl estradiol, arginine, aspartic acid, cystine, cysteine, methionine , Amino acids such as serine, leucine, tryptophan, allantoin,
Anti-inflammatory agents such as glycyrrhetinic acid and azulene, whitening agents such as arbutin, astringents such as zinc oxide and tannic acid, cooling agents such as L-menthol and camphor, and sulfur, lysozyme chloride, pyridoxine hydrochloride, γ-oryzanol, etc. . Various extracts include Dokudami extract, Oataku extract, Merrilot extract, Odorikosou extract, licorice extract, peony extract, Saponsou extract, Loofah extract, Quina extract, Yukinoshita extract, Clara extract, Kohone extract, Fennel extract, Primrose extract, Rose extract. , Dio extract, lemon extract, shikon extract, aloe extract, ginger root extract, eucalyptus extract, horsetail extract, sage extract, thyme extract,
Tea extract, seaweed extract, cucumber extract, clove extract, raspberry extract, melissa extract, carrot extract, carrot extract, horse chestnut extract, peach extract, peach leaf extract, mulberry extract, cornflower extract, hamamelis extract, placenta extract, thorax extract , Silk extract, etc. Further, the above-mentioned drugs can be used in a free state, those capable of salt formation can be used in the form of acid or base salts, and those having a carboxylic acid group can be used in the form of their esters.

In addition to these, silicone resin, silicone rubber and the like can be blended. Further, if necessary, an appropriate fragrance, a colorant, and the like can be added to the emulsion composition of the present invention as long as the emulsion stability is not impaired. Further, the stability is further improved by adding a small amount of a surfactant such as monoglyceride, sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, and polyoxyethylene fatty acid ether.

[0017]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples. The present invention is not limited to this. All compounding amounts are% by weight. Examples 1 to 5 and Comparative Examples 1 and 2 A cosmetic emulsion was produced with the following composition.

[0018]

[Table 1] ────────────────────────────────── Actual example ratio Comparative example component 1 2 3 4 5 1 2 3 ────────────────────────────────── A. Oil phase Isostearyl alcohol 0.1% 0.5% 2.0% 5.0% 10.0%-% 2.0%-% Stearyl alcohol-------2.0 Fluid paraffin 19.9 19.5 20.0 15.0 10.0 22.0 20.0 2.0 B. Aqueous phase PEMULEN TR-1 0.2 0.2 0.2 0.2 0.2 0.2-0.2 CARBOPOL 941------0.2-Triethanolamine 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 Glycerin 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Ethyl alcohol 5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Methyl paraoxy benzoate 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Trisodium edetate 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Ion-exchanged water Residual Residual Residual Residual Residual Residual Residual ─────────────────────── Stability 50 ℃, 1 month ○ ○ ◎ ◎ ◎ ◎ △ × ○ 0 ℃, 1 month ○ ○ ○ ○ ○ ○ ○ ○ × ──────────────────────────────────

-Manufacturing Method-Emulsifying with an emulsifier while adding the oil phase component to the aqueous phase component. [Stability Evaluation Criteria] Stability at 50 ° C. for 1 month ◯: Oil separation is not observed at all Δ: Oil separation is slightly observed ×: Oil separation is clearly recognized Stability at 0 ° C for 1 month ◯: Crystal precipitation is not observed at all Δ: Crystal precipitation is slightly observed ×: Crystal precipitation is clearly observed.

From these results, it was found that an emulsion composition having good stability can be obtained by using the alkyl-modified carboxyl vinyl polymer in combination with the liquid higher alcohol.

Example 2 Emulsion A. Oil phase Squalane 10% Isopropyl palmitate 5 Vaseline 3 Dimethylpolysiloxane 2 Hexyldecanol 3 α-troferol 0.3 B. Aqueous phase Triethanolamine 0.25 Polyethylene glycol 8 Methyl paraoxybenzoate 0.1 Sodium metaphosphate 0.1 CARBOPOL 1342 0.3 Hydroxypropylmethylcellulose 0.1 Ion-exchanged water Residual-Process-The oil phase of A is the water of B Add to the phase and emulsify with an emulsifier.

Example 3 Emulsion A. Oil phase Decyl tetradecanol 0.2% Olive oil 10 Lanolin 3 Glyceryl tri-2-ethylhexanoate 3 2-Ethylhexyl paramethoxycinnamate 2 dl-α-tocopherol acetate 0.5 Ethyl paraoxybenzoate 0.1 B. Aqueous phase Propylene glycol 5 Sodium hyaluronate 0.1 Trisodium edetate 0.1 PEMULEN TR-2 6.0 Carboxymethyl cellulose 0.8 Potassium hydroxide 2.5 Ion-exchanged water Residual-Preparation-Same as Example 1.

Example 4 Emulsion A. Oil phase Liquid paraffin 10% Jojoba oil 4 Oleyl alcohol 8 Cetyl 2-ethylhexanoate 3 Vitamin A oil 0.1 B. Aqueous phase Arbutin 2 Magnesium ascorbyl phosphate 1 Placenta extract 0.5 Luffa extract 2 PEMULEN TR-1 0.02 CARBOPOL 941 0.15 2-Amino-2-methyl-1-propanol 0.3 Sodium edetate 0. 15 Methyl paraoxybenzoate 0.1 Phenoxyethanol 0.2 Ion-exchanged water Residue-Production method-The same as in Example 1.

Example 5 Hair Cream A. Oil phase Liquid paraffin 15% Vaseline 6 Isostearyl alcohol 4 Vitamin E palmitate 0.3 Preservative proper amount Perfume proper amount B. Aqueous phase Xanthan gum 0.1 Glycerin 5.0 PEMULEN TR-1 0.7 CARBOPOL 941 0.15 Sodium edetate 0.15 Ion-exchanged water Residual-Preparation-Same as Example 1.

[0025]

According to the present invention, an emulsion composition having excellent long-term stability can be obtained.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area A61K 7/48

Claims (5)

[Claims] 1. An emulsion composition comprising an alkyl-modified carboxyl vinyl polymer and a higher alcohol having a carbon number of 12 to 28 at room temperature (25 ^° C.). 2. The emulsion composition according to claim 1, which is substantially free of a surfactant. 3. A liquid higher alcohol content of 0.5 to
The emulsified composition according to claim 1 or 2, which is 5% by weight. 4. The emulsified composition has an oil content of 1 to 30.
The emulsified composition according to any one of claims 1 to 3, which is contained in a weight percentage. 5. The emulsified composition according to claim 4, wherein the oil component contains silicone oil. [0001]