JPH0919631A - Emulsified composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an emulsified compsn. having satisfactory aging stability of the emulsified state without using a surfactant by incorporating an alkyl modified carboxyvinyl polymer and PVA, its deriv. or polyvinylpyrrolidone. SOLUTION: The stability of an emulsified compsn. over a long period of time is improved by incorporating PVA or its deriv. such as polyvinyl acetate and/or polyvinylpyrrolidone and an alkyl modified carboxyvinyl polymer such as an acrylic acid-alkyl methacrylate copolymer preferably by 0.05-1wt.% and 0.05-5wt.%, respectively. Oil is further incorporated by 1-50wt.%.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an emulsified composition, and more particularly to an emulsified composition capable of maintaining stability for a long period of time without the addition of a surfactant.

[0002]

2. Description of the Related Art Conventionally, as an emulsion composition for cosmetics,
BACKGROUND ART Creams and emulsions in which various oily and aqueous components are emulsified are widely used. In the production of such an emulsified composition, it is necessary not only to treat the raw material under strictly set conditions, but also to use a surfactant in order to guarantee the temporal stability of the emulsified composition. Has been done.

However, in recent years, even higher safety has been expected for cosmetics, and from this viewpoint, the presence of a surfactant may be a problem. Therefore, a method for obtaining a cosmetic emulsion by using an alkyl-modified water-soluble polymer without using a surfactant (Cosmetics and Toi
letries, Vol.101, No.11, p125) and the like, but these emulsion compositions also have large emulsion particles and are not necessarily satisfactory in terms of long-term stability of the emulsion.

[0004]

SUMMARY OF THE INVENTION In view of such circumstances, an object of the present invention is to provide an emulsion composition which does not use a surfactant and has good emulsion stability over time.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above problems, the present inventors have found that
It has been found that the long-term stability of an emulsion composition is improved by containing one or more selected from polyvinyl alcohol (or a derivative thereof) or polyvinylpyrrolidone and an alkyl-modified carboxyvinyl polymer. The invention has been completed.

That is, the emulsion composition of the present invention comprises an alkyl-modified carboxyvinyl polymer, polyvinyl alcohol or a derivative thereof, or polyvinylpyrrolidone.
It is characterized by containing. The emulsion composition of the present invention,
It is characterized in that it contains substantially no surfactant. The content of the polyvinyl alcohol or its derivative or polyvinylpyrrolidone is preferably 0.01 to 2% by weight, more preferably 1 to 50% by weight of oil.

The constitution of the emulsion composition of the present invention will be described below. The alkyl-modified carboxyvinyl polymer used in the emulsion composition of the present invention is an alkyl acrylate / methacrylic acid copolymer, such as CARBOPOL 1342, PEMULEN TR-
The ones known under the trade name of PEMULEN TR-2 (BFGoodrich) are mentioned. The alkyl-modified carboxyvinyl polymer may be used alone or in combination of two or more.
The blending amount is preferably 0.01 to 10% by weight,
Further, from the viewpoint of usability, the range of 0.05 to 5% by weight is more preferable. If it is less than 0.01%, it is difficult to emulsify 1
Even if it is blended in an amount exceeding 0%, an increase in the emulsifying action and the effect of improving the emulsion stability cannot be expected.

[0008] Incidentally, a carboxyvinyl polymer usually used as a thickener (for example, CARBOPOL 941 (BFGo
(Odrich), Hibiswako 105 (Wako Pure Chemical Industries, Ltd.), etc.) cannot stably emulsify oil. Examples of polyvinyl alcohol or its derivative used in the present invention include polyvinyl acetate, polyvinyl butyral and the like, in addition to polyvinyl alcohol.

The compounding amount is 0.01 to 2% by weight, preferably 0.05 to 1% by weight. If it is less than 0.01%, its effect (long-term stability of emulsion) is hardly exhibited, and if it exceeds 2%, the improvement of the effect is small and it is not preferable. The following are preferably used as the oil component used in the present invention. As the liquid oil, linseed oil, camellia oil, macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, sasanqua 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, Examples thereof include triglycerin, glyceryl trioctanoate, pentaerythritol tetraoctanoate, and glycerin triisopalmitate.

Examples of solid fats and oils include cacao butter, coconut oil, palm oil, palm kernel oil, beef tallow, lard, sheep fat, horse fat, hydrogenated oil, hydrogenated castor oil, oak and shea butter. As waxes, beeswax, candelilla wax, cotton wax,
Carnauba wax, Bayberry wax, Ibota wax, whale wax, montan wax, bran wax, lanolin, reduced lanolin, hard lanolin, kapok wax, sugarcane 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, 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, glyceryl tri-2-ethylhexanoate,
Examples include pentaerythritol tetra-2-ethylhexanoate and 2-ethylhexyl succinate.

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, methylhydrogenpolysiloxane, octamethylcyclotetrasiloxane,
Cyclic silicones such as decamethylcyclopentasiloxane and dodecamethylcyclohexasiloxane are used.

The above oil content is preferably 50% by weight or less, more preferably 1 to 30% by weight.
Usability is improved in the range of 1 to 30% by weight. Also, 50
If the amount is more than 10% by weight, it is difficult to obtain sufficient stability even if the alkyl-modified carboxy polymer is used in combination with polyvinyl alcohol or its derivative or polyvinylpyrrolidone.

In the emulsion composition of the present invention, in addition to the above-mentioned main components, various raw materials usually used in cosmetics described below can be used. Examples of the lower alcohol include methanol, ethanol, propanol, isopropanol and the like.
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, xylitol, maltitol, maltose, erythritol, trehalose, D-mannitol, starch syrup, glucose, fructose, lactose, sodium chondroitin sulfate, sodium hyaluronate, adenosine There are sodium 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. Molecule, 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, alginic acid polymer such as propylene glycol alginate, polyvinyl methyl ether, vinyl polymer such as carboxyvinyl polymer (CARBOPOL, etc.), 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 paraparasitic acid. Isopropyl methoxycinnamate, octyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, [4-bis (trimethylsiloxy) methylsilyl-3-methylbutyl ] -3,4,5-Trimethoxycinnamic acid ester and other cinnamic acid type ultraviolet absorbers, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5
-Sulfonic acid, benzophenone-based UV absorbers such as sodium 2-hydroxy-4-methoxybenzophenone-5-sulfonate, urocanic acid, ethyl urocanate,
2-phenyl-5-methylbenzoxazole, 2-
(2'-hydroxy-5'-methylphenyl) benzotriazole, 4-tert-butyl-4'-methoxybenzoylmethane and the like.

Examples of the sequestering agent include alanine, sodium edetate, sodium polyphosphate, sodium metaphosphate and phosphoric acid. 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 the pH adjusting agent include lactic acid, citric acid, glycolic acid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate, sodium hydrogencarbonate and ammonium hydrogencarbonate. Antioxidants include ascorbic acid, α-
Examples include tocopherol, dibutylhydroxytoluene, butylhydroxyanisole and the like.

Antibacterial agents include benzoic acid, salicylic acid,
Examples include phenolic acid, sorbic acid, paraoxybenzoate, parachloromethcresol, hexachlorophen, benzalkonium chloride, chlorhexidine chloride, trichlorocarbanilide, photosensitizer, phenoxyethanol and the like.
As the drug, vitamin A oil, retinol, retinol palmitate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinic acid amide, nicotinic acid dl-α
-Tocopherol, magnesium ascorbate phosphate, vitamin D ₂ (ergocasiferol), dl-α
-Tocopherol, dl-α-tocopherol acetate, pantothenic acid, vitamins such as biotin, hormones such as estradiol and ethinyl estradiol, amino acids such as arginine, aspartic acid, cystine, cysteine, methionine, serine, leucine and tryptophan,
Anti-inflammatory agents such as allantoin, glycyrrhetinic acid, tranexamic acid and azulene, whitening agents such as arbutin, astringents such as zinc oxide and tannic acid, cooling agents such as L-menthol and camphor, sulfur and lysozyme chloride, pyridoxine hydrochloride, γ -There are oryzanols.

[0021] Examples of various extracts include Dokudami extract,
Oak extract, melilot extract, bonito extract, liquorice extract, peonies extract, bonsai extract, loofah extract, kina extract, saxifrage extract,
Clara extract, Kouhone extract, Fennel extract, Primrose extract, Rose extract, Jiao extract, Lemon extract, Sikon extract, Aloe extract, Shobu root extract, Eucalyptus extract, Japanese cedar extract, Sage extract, Thyme extract, Tea extract, Seaweed extract, Cucumber extract, Clove Extracts, raspberry extract, melissa extract, carrot extract, carrot extract, maroni extract, peach extract, peach extract, mulberry extract, cornflower extract, hamamelis extract, placenta extract, thoracic extract, silk extract and the like.

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 the above, 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.

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 or polyoxyethylene fatty acid ether.

[0024]

EXAMPLES The present invention will be described in more detail with reference to the following examples. The present invention is not limited to these examples. In addition, the compounding amounts shown below are all% by weight. The emulsion stability of the emulsified composition of the present invention was evaluated by observing the state after the emulsified composition was allowed to stand in a constant temperature bath at 50 ° C. for 1 month, and evaluated according to the following evaluation criteria.

(Stability Evaluation Criteria) ⊚: No oil separation is observed ∘: Almost no oil separation is observed Δ: Slight oil separation is recognized ×: Oil separation is clearly recognized (Example 1) ~ 4, Comparative Examples 1 to 3) By emulsifying with an emulsifier while adding the oil phase component shown in Table 1 to the water phase component,
Cosmetic emulsion compositions having various compositions were produced and evaluated based on the above criteria. The results are also shown in Table 1.

[0026]

[Table 1] As shown in Table 1, the emulsion compositions of Examples 1 to 4 in which an alkyl-modified carboxyvinyl polymer and polyvinyl alcohol (or polyvinylpyrrolidone) were used in combination were found to be excellent in long-term stability of the emulsion. It was

Example 5 A cleansing lotion having the following composition was prepared and evaluated in the same manner as in Example 1. The cleansing lotion of this example was emulsified in the same manner as in Example 1. It was found to be excellent with good stability. A. Oil phase Squalane 10.0% Isopropyl palmitate 5.0 Vaseline 3.0 Dimethyl polysiloxane 2.0 α-Tocopherol 0.3 B. Aqueous phase Triethanolamine 0.25 Polyethylene glycol 8.0 Methyl paraoxybenzoate 0.1 Sodium metaphosphate 0.1 Polyvinylpyrrolidone 0.1 CARBOPOL 1342 0.3 Hydroxypropyl methylcellulose 0.1 Ion-exchanged water Residual (Example 6 ) An emulsion having the composition shown below was prepared and evaluated in the same manner as in Example 1. As a result, the emulsion of this example was excellent in long-term stability of emulsification as in Example 1. It turned out that

A. Oil phase Olive oil 10.0 Lanolin 3.0 Glyceryl tri-2-ethylhexanoate 3.0 2-Ethylhexyl paramethoxycinnamate 2.0 Acetic acid dl-α-tocopherol 0.5 Ethyl paraoxybenzoate 0.1 Tetraoctanoic acid Penta Erislit 1.0 B. Water phase Propylene glycol 5.0 Polyvinyl acetate 0.05 Sodium hyaluronate 0.1 Trisodium edetate 0.1 PEMULEN TR-2 0.8 Carboxymethyl cellulose 0.8 Potassium hydroxide 0.3 Ion-exchanged water Residual (implemented Example 7) An emulsion having the composition shown below was prepared and evaluated in the same manner as in Example 1. The emulsion of this example was excellent in long-term stability of emulsification as in Example 1. It turned out to be

A. Oil phase Liquid paraffin 10.0 Jojoba oil 4.0 Cetyl 2-ethylhexanoate 3.0 Vitamin A oil 0.1 B.I. Water phase Arbutin 2.0 Magnesium ascorbyl phosphate 1.0 Placenta extract 0.5 Loofah extract 2.0 Polyvinyl alcohol 0.1 PEMULEN TR-1 0.02 CARBOPOL 941 0.15 2-Amino-2-methyl-1 -Propanol 0.3 Sodium edetoacetate 0.15 Methyl paraoxybenzoate 0.1 Phenoxyethanol 0.2 Ion-exchanged water Residual

[0030]

Industrial Applicability According to the present invention, it is possible to provide an excellent emulsified composition having good stability for a long period of time without using a surfactant.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area A61K 47/32 A61K 47/32 H B01F 17/38 B01F 17/38

Claims (4)

[Claims] 1. An emulsion composition comprising an alkyl-modified carboxyvinyl polymer and polyvinyl alcohol or a derivative thereof or polyvinylpyrrolidone. 2. The emulsion composition according to claim 1, which is substantially free of a surfactant. 3. The content of the polyvinyl alcohol or its derivative or polyvinyl pyrrolidone is 0.0.
1 to 2% by weight, characterized in that
3. The emulsified composition according to item 1. 4. The emulsified composition according to claim 1, which contains 1 to 50% by weight of an oil component.