JPH0987130A - Emulsified composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an emulsified composition, having good feeling of use without causing the stickiness and good in emulsification stability without using a surfactant by using a specific water-soluble cellulosic derivative and a solid higher alcohol in combination. SOLUTION: This emulsified composition is obtained by combining a water-soluble cellulosic derivative modified with an 8-30C alkyl and a 12-28C higher alcohol which is a solid at ambient temperature in combination so as not to substantially contain a surfactant. A derivative such as methyl hydroxypropyl cellulose or hydroxyethyl cellulose is preferred as the water-soluble cellulosic derivative modified with the 8-30C alkyl. A silicone oil having <=20cSt at 25 deg.C may further be added to the system and 0.6-5wt.% solid higher alcohol is preferably contained therein. Furthermore, the cellulosic derivative is blended in an amount of about 0.01-10wt.%.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an emulsified composition, and more particularly to an emulsified composition which is less sticky to the skin, has an excellent feeling in use, and has good emulsion stability.

[0002]

2. Description of the Related Art Conventionally, as an emulsion composition for cosmetics,
Creams and emulsions using various oily and aqueous components and surfactants are widely used.

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, there is a method of obtaining a cosmetic emulsion by utilizing an alkyl-modified water-soluble cellulose derivative without using a surfactant, but this emulsion composition does not have a sufficient feeling in use, and especially during application to the skin. It had the drawback of being sticky.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an emulsified composition which does not use a surfactant, has a good feeling of use without stickiness, and has good emulsion stability.

[0005]

Means for Solving the Problems As a result of intensive studies conducted by the present inventors in view of the above circumstances, an emulsion composition containing an alkyl-modified water-soluble cellulose derivative and a solid higher alcohol was used without stickiness and good use. They found that they had a good feeling and good emulsion stability, and completed the present invention.

That is, the emulsion composition of the present invention has 8 to 8 carbon atoms.
It is characterized by containing a water-soluble cellulose derivative modified with an alkyl group of 30 and a higher alcohol having 12 to 28 carbon atoms and being solid at room temperature, and substantially not containing a surfactant.

The alkyl group-modified water-soluble cellulose derivative is preferably a derivative of methyl hydroxypropyl cellulose or hydroxyethyl cellulose.

The emulsified composition of the present invention preferably contains a silicone oil having a viscosity at 25 ° C. of 20 cSt or less.
It is preferably contained in an amount of up to 5% by weight.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The emulsion composition of the present invention is, for example,
By emulsifying with an emulsifier while adding an oil phase component obtained by heating and dissolving a solid higher alcohol having 12 to 28 carbon atoms to an aqueous phase component containing a water-soluble cellulose derivative modified with an alkyl group having 8 to 30 carbon atoms. A stable emulsion composition can be obtained without adding a surfactant. Moreover, the obtained emulsion composition has less stickiness and is excellent in usability.

The alkyl group-modified water-soluble cellulose derivative of the present invention is one in which an alkyl group is introduced into a cellulosic thickening agent such as methyl hydroxypropyl cellulose or hydroxyethyl cellulose. 8 to 3 carbon atoms in some of the hydroxy groups of
It can be synthesized by adding 0 fatty acid glycidyl ether. Examples of commercially available products include NATORO
SOL Plus (Aqualon), Sangelose (Sankyo Chemical)
And the like.

In the present invention, the number of carbon atoms of the introduced alkyl group is set to 12 to 30. If it is less than 12, the hydrophobicity of the alkyl group-modified water-soluble cellulose derivative is insufficient and the emulsion becomes unstable. Further, when it is 31 or more, the hydrophobicity becomes too strong and the water solubility is lost, so that the emulsification becomes difficult.

The blending amount is preferably 0.01 to 10% by weight, and more preferably 0.1 to 5% by weight from the viewpoint of feeling in use. 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.

It should be noted that the commonly used cellulosic thickeners cannot stably emulsify oil.

The higher alcohol having 12 to 28 carbon atoms and solid at room temperature of the present invention may be used alone or in combination of two or more kinds. Specific examples include linear alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, cetostearyl alcohol, glyceryl monostearyl ether (batyl alcohol), glyceryl monocetyl ether (chimyl alcohol) and the like. Examples include chain alcohols.

The higher alcohol having 12 to 28 carbon atoms is liquid when the carbon number is less than 12, and the effect of the present invention (feeling without stickiness) cannot be obtained, and the carbon number is 29.
This is because the melting point becomes higher and the emulsification becomes difficult if the above is satisfied.

The blending amount is 0.01 to 10% by weight, preferably 0.6 to 5% by weight. If it is less than 0.01%, the effect is not sufficient, and if it exceeds 10%, the improvement of the effect is small and it is not preferable.

For the emulsion composition used in the present invention, the following various raw materials usually used in cosmetics can be used.

Examples of the silicone oil include dimethylpolysiloxane, methylphenylpolysiloxane, hexamethyldisiloxane, octamethyltrisiloxane, methylpolysiloxane, hexamethylcyclotrisiloxane, octamethylcyclotetrasiloxane and methylpolycyclosiloxane. To be When these silicone oils are mixed with a part of the oil component, stickiness is further reduced. The compounding amount is 0.1 to 30% by weight, preferably 5 to 20% by weight. If it is less than 0.1%, the effect is not exhibited, and if it exceeds 30%, the effect cannot be further improved. The viscosity is 20 cSt at 20 ° C.
The following are desirable. Even if a highly viscous material is added, stickiness cannot be reduced.

Liquid oils and fats include linseed oil, camellia oil,
Macadamia nut oil, corn oil, mink oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, jojoba oil, sunflower oil, almond oil, rapeseed oil, sesame oil, soybean oil, peanut oil, triglycerin, glycerin trioctanoate And glycerin triisopalmitate.

Examples of solid oils and fats include cacao butter, coconut oil, palm oil, palm kernel oil, hydrogenated oil, hydrogenated castor oil, sorghum, and shea butter.

Examples of waxes include beeswax, carnauba wax, lanolin, reduced lanolin, hard lanolin, jojoba wax and shellac wax.

As the ester oil, cetyl octanoate,
Hexyl laurate, isopropyl myristate, octyl palmitate, isocetyl stearate, isopropyl isostearate, octyl isopalmitate, isodecyl oleate, glyceryl tri-2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, succinic acid 2 -Ethylhexyl, diethyl sebacate and the like.

Hydrocarbon oils include liquid paraffin, squalane, squalene, paraffin, isoparaffin,
Ceresin, vaseline, microcrystalline wax and the like.

The lower alcohol includes methanol, ethanol, propanol, isopropanol and the like.

Moisturizers include polyethylene glycol, propylene glycol, dipropylene glycol,
1,3-butylene glycol, hexylene glycol,
There are glycerin, diglycerin, xylitol, maltitol, maltose, D-mannitol, erythritol and the like.

Examples of the water-soluble polymer include plant-based polymers such as gum arabic, carrageenan, pectin, agar, quince seed (quince), starch, arge colloid (brown algae extract), microbial polymers such as dextran and pullulan, and the like. Animal-based polymers such as collagen, casein and gelatin, starch-based polymers such as carboxymethyl starch and methyl hydroxypropyl starch, cellulose-based polymers such as methyl cellulose, nitrocellulose, ethyl cellulose, methyl hydroxypropyl cellulose and hydroxyethyl cellulose, sodium alginate Alginic acid type polymers such as, carboxyvinyl polymer (as a suitable example, CARBOPOL (manufactured by BF Goodrich), etc.), alkyl-modified carboxyvinyl polymer (as a suitable example, PEMULEN (manufactured by BF Goodrich)) , Etc.) vinyl polymers, polyoxyethylene polymers, polyoxyethylene polyoxypropylene copolymer polymers, sodium polyacrylate, acrylic polymers such as polyacrylamide, bentonite, magnesium aluminum silicate Inorganic water-soluble polymer such as Laponite, etc.

Examples of the ultraviolet absorber include benzoic acid type ultraviolet absorbers such as paraaminobenzoic acid, anthranilic acid type ultraviolet absorbers such as methyl anthramylate, salicylic acid type ultraviolet absorbers such as octyl salicylate and phenyl salicylate, and paramethoxy cinnamate. Cinnamic acid type UV absorbers such as isopropyl acid octyl, octyl paramethoxycinnamate, glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, 2,4-dihydroxybenzophenone, 2-hydroxy-4
-Methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid and other benzophenone-based UV absorbers, urocanic acid, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, 4-tert-butyl -4'-methoxybenzoylmethane and the like.

Examples of the sequestering agent include sodium edetate, sodium metaphosphate, phosphoric acid and the like.

Examples of the neutralizing agent include 2-amino-2-methyl-1-propanol, potassium hydroxide, sodium hydroxide, triethanolamine and sodium carbonate.

As antioxidants, ascorbic acid, α
-Tocopherol, dibutylhydroxytoluene, butylhydroxyanisole and the like.

Antibacterial agents include benzoic acid, salicylic acid,
Examples include carboxylic acid, sorbic acid, paraoxybenzoic acid ester, parachlorometacresol, chlorhexidine chloride, trichlorocarbanilide, and phenoxyethanol.

As the drug, vitamin A oil, retinol, retinol palmitate, inosit, pyridoxine hydrochloride, benzyl nicotinate, nicotinic acid amide, DL-α-tocopherol nicotinate, magnesium ascorbate phosphate, vitamin D2 (ergocasiferol) ), D
L-α-tocopherol, acetic acid dl-α-tocopherol, 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 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,
Examples include pyridoxine hydrochloride and γ-oryzanol.

As various kinds of extracts, 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. .

Further, to the emulsion composition of the present invention, if necessary, suitable fragrances, dyes and the like can be added within a range that does not impair the emulsion stability.

Further, the stability is improved by adding a small amount of a surfactant such as monoglyceride, sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene hydrogenated castor oil, polyoxyethylene fatty acid ether and the like.

[0037]

Next, 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 amounts are by weight.

[Examples 1 and 2, Comparative Examples 1 and 2] The emulsified composition having the composition shown in Table 1 was heated to a liquid state by heating the oil phase component A and added to the water phase component B while emulsifying machine. It was emulsified and manufactured. The following tests were performed on the obtained emulsified compositions, and the feeling of use and stability of each emulsified composition were evaluated. The results are also shown in Table 1.

(1) Sensory test by a panel specialized in women A sense of use as an emulsified composition was evaluated by 25 panelists of women and evaluated according to the following criteria.

[Evaluation Criteria for Stickiness] ⊚: Excellent (20 or more out of 25 evaluated as good) ○: Good (15 to 20 out of 25 evaluated as good) Δ: Acceptable (10 out of 25) 1 or more and less than 15 are evaluated as good) ×: Not possible (less than 10 out of 25 are evaluated as good) (2) Stability test After leaving the emulsion composition in a constant temperature bath at 50 ° C. for 1 month. The state was observed and the stability of the emulsion composition was evaluated according to the following criteria.

[Stability Evaluation Criteria] O: No oil separation is observed. B: Slight oil separation is observed. X: Oil separation is clearly observed.

[0042]

[Table 1] ───────────────────────────────── Ingredients Example 1 Example 2 Comparative Example 1 Comparative Example 2 ───────────────────────────────── A. Oil phase Fluid paraffin 15.0% 15.0% 15.0% 15.0% Stearyl alcohol 3.0 3.0-3.0 Dimethylpolysiloxane (20cSt) -5.0-B. Aqueous phase NATROSOL Plus 330 1.5 1.5 1.5 ー (manufactured by Aqualon) Human benzyloxyethyl cellulose ー ー 1.5 Propylene glycol 10.0 10.0 10.0 10.0 Ethyl alcohol 5.0 5.0 5.0 5.0 Methyl paraoxybenzoate 0.1 0.1 0.1 0.1 Trisodium edetate 0.1 0.1 0.1 0.1 Ion exchange Water Residual Residual Residual ────────────────────────────────── Stability ○ ○ ○ × Stickiness ○ ◎ × ○ ─ ────────────────────────────────

From Table 1, it can be seen that the emulsion compositions of Examples 1 and 2 of the present invention have no stickiness, are excellent in feeling of use, and have excellent emulsion stability. Especially at 20 ℃
It can be seen that the emulsified composition of Example 2 containing 20 cSt of silicone oil has a higher usability.

[Embodiments 3 to 5] In the same manner as in Embodiment 1,
When an emulsion composition having the composition shown below was prepared and evaluated in the same manner, it was found that each of the compositions had excellent emulsion stability and a non-greasy feeling during use.

(Example 3) A. Oil phase Dimethyl polysiloxane 10.0 Isopropyl myristate 5.0 Squalane 5.0 α-troferol 0.3 Cetyl alcohol 5.0 B. Aqueous phase Propylene glycol 10.0 Methyl paraoxybenzoate 0.1 Sodium metaphosphate 0.1 NATROSOL Plus 330 0.01 Hydroxypropyl methylcellulose 0.1 Ion-exchanged water Residual

(Example 4) A. Oil phase Olive oil 2.0 Acetic acid dl-α-tocopherol 0.5 Ethyl paraoxybenzoate 0.1 Behenyl alcohol 0.01 Methylphenylpolysiloxane (6cSt) 20.0 B.I. Water phase Propylene glycol 10.0 Trisodium edetate 0.1 PEMULEN TR-2 (manufactured by BF Goodrich) 2.0 NATROSOL Plus 330 10.0 Potassium hydroxide 0.5 Ethanol 7.0 Ion-exchanged water Residual

(Example 5) A. Oil phase Liquid paraffin 10.0 Dimethyl polysiloxane 1.0 Macadamia nut oil 10.0 Vitamin A oil 0.1 Batyl alcohol 10.0 B. Aqueous phase 1,3-butylene glycol 10.0 Propylene glycol 3.0 Arbutin 2.0 Magnesium ascorbate phosphate 1.0 Placenta extract 0.5 Loofah extract 2.0 NATROSOL Plus 330 5.0 CARBOPOL 941 (BF Goodrich) 0.15 Trisodium edetate 0.15 Methyl paraoxybenzoate 0.1 Phenoxyethanol 0.2 Ion-exchanged water Residual

[0048]

EFFECTS OF THE INVENTION According to the inventions of claims 1 and 2, it is possible to provide an excellent emulsified composition which is free from stickiness, has a good feeling in use, and has a good emulsion stability without using a surfactant.

According to the third aspect of the invention, an emulsified composition which further suppresses stickiness and has a higher usability can be obtained. Further, according to the invention of claim 4, the emulsion stability and the feeling of use are further improved.

Claims (4)

[Claims] 1. A water-soluble cellulose derivative modified with an alkyl group having 8 to 30 carbon atoms and a higher alcohol having 12 to 28 carbon atoms which is solid at room temperature, and substantially contains a surfactant. An emulsified composition characterized by the absence thereof. 2. The emulsion composition according to claim 1, wherein the water-soluble cellulose derivative modified with an alkyl group is a derivative of methylhydroxypropyl cellulose or hydroxyethyl cellulose. 3. The emulsion composition according to claim 1, comprising a silicone oil having a viscosity at 25 ° C. of 20 cSt or less. 4. The solid higher alcohol is added in an amount of from 0.6 to
The emulsified composition according to any one of claims 1 to 3, which contains 5% by weight.