JPH08245364A - W/o/w-type emulsion cosmetic - Google Patents

Abstract

PURPOSE: To obtain the subject cosmetic excellent in productivity and stability as a W/O/W-type emulsion and having excellent usability. CONSTITUTION: This W/O/W-type emulsion cosmetic is composed of (A) one or more than one kind selected from a polyoxyalkylene-modified organopolysiloxane, an organopolysiloxane modified with an alkylether group and a polyoxyalkylene group, and an organopolyoxysiloxane modified with an alkyl group and a polyoxyalkylene group, (B) an anionic surfactant, (C) a nonionic surfactant having a HLB-value of 5-15, and (D) an oil-phase component containing a silicone oil in an amount of >=30wt.%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a W / O / W (water phase / oil phase / water phase) type emulsified cosmetic composition. More specifically, it has excellent usability and stability over time. The present invention relates to a W / O / W type emulsion cosmetic.

[0002]

2. Description of the Related Art Conventionally, a W / O / W (water phase / oil phase / water phase) type emulsified cosmetic composition requires a technique for its production method and blending components because of its special emulsified form, Compared with (oil phase / water phase) type emulsified cosmetics, it has been widely studied as a cosmetic formulation having a strong feeling of use and a high emollient effect.

[0003]

However, as the oil phase component of the conventional W / O / W type emulsified cosmetics, mineral oil,
Since it was formulated with an oil agent having a carbon skeleton including animal and vegetable oils and synthetic oils, it sometimes caused a sticky feeling when applied to the skin, and it was difficult to obtain a fresh and fresh feeling.

On the other hand, in recent years, in the field of cosmetics, blending of silicone oil having excellent properties such as low surface tension and lubricity has been studied in various fields. By blending silicone oil, it is possible to produce a refreshing feeling that was not available in the past, but silicone oil has poor compatibility with oil agents, making it difficult to obtain stable emulsion cosmetics by blending this In some cases, stable blending into a special emulsified W / O / W type emulsified cosmetic is difficult. Therefore, it has been desired to develop a W / O / W type emulsified cosmetic having an emollient effect, a non-greasy feeling, and good stability.

[0005]

In view of the above-mentioned circumstances, the present inventor, as a result of earnest research, found that the above-mentioned problems can be solved by using a specific surfactant together, and completed the present invention. I arrived. That is, the present invention provides the following components (A) to
(D); (A) one or more selected from polyoxyalkylene-modified organopolysiloxane, alkyl ether polyoxyalkylene co-modified organopolysiloxane, alkylpolyoxyalkylene co-modified organopolysiloxane (B) anionic interface Activator (C) Nonionic surfactant having an HLB value of 5 to 15 (D) W / O / W type emulsion cosmetic containing an oil phase component containing 30% by weight or more of silicone oil Is. Hereinafter, each component used in the present invention will be sequentially described.

Regarding Component (A) Examples of the polyoxyalkylene-modified organopolysiloxane (A), alkyl ether polyoxyalkylene co-modified organopolysiloxane and alkylpolyoxyalkylene co-modified organopolysiloxane of (A) include, for example, compounds represented by the following general formula: The thing represented by (1) or (2) is mentioned.

[0007]

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[In the formula, R ₁ represents an alkyl group having 1 to 5 carbon atoms or a phenyl group. R ₂ is -Q ₁ -O- (C ₂ H _{4
O) m- (C 3 H 6} O) n-R 3 ( where, Q ₁ is a carbon number 1
To 5 divalent hydrocarbon groups, and R ₃ represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or an acetyl group. m is 1
The above integer, n is 0 or an integer of 1 or more. ). G ₁ and G ₂ may be the same or different and each represents R ₁ or R ₂ . a and b are 0 or 1 respectively
Indicates the above integer. However, when b = 0, at least one of G ₁ and G ₂ is R ₂ . ]

[0009]

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[Wherein R ₁ , R ₂ , a and b have the same meanings as described above, R ₄ is an alkyl group having 2 to 20 carbon atoms or -Q ₂ -O-R ₅ (Q ₂ is Represents a divalent hydrocarbon group having 1 to 4 carbon atoms, and R ₅ represents a hydrocarbon group having 8 to 30 carbon atoms). G ₃ and G ₄ may be the same or different and each represent R ₁ , R ₂ or R ₄ , and c represents 0 or an integer of 1 or more. However, when b = 0, at least one of G ₃ and G ₄ is R ₂ , and when c = 0, at least one of G ₃ and G ₄ is R ₄ . ]

The component (A) preferably has a silicone main chain or an alkyl-modified silicone main chain as a lipophilic group, an ethylene oxide chain or a propylene oxide chain as a hydrophilic group, and has an HLB of 3 to 8. Specific examples of the component (A) are shown below.

[0012]

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[0013]

[Chemical 4]

[0014]

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These are liquids or pastes at room temperature, and water-insoluble ones are particularly preferable. The blending amount of the component (A) varies depending on the type and blending amount of the oil agent and is not particularly limited, but preferably, the weight ratio to the inner aqueous phase is: inner aqueous phase: (A) component = 1: 0.2 to. It is 1: 1. When used in this range, a better W / O / W form can be maintained without causing separation or aggregation.

Component (B) Component (B) is an anionic surfactant. Examples of the surfactant include stearate, stearoylmethyl taurate, N-acyl-L-glutamate, and the like. Examples of the salt include sodium, potassium, and
Examples include triethanolamine. One or two or more of these can be appropriately selected and used. (B)
The blending amount of the components is not particularly limited, but preferably,
It is 0.01 to 3% by weight (hereinafter, simply indicated by%). When used in this range, W / O / W with even better stability
A type emulsified cosmetic can be obtained.

Component (C) Component (C) is a nonionic surfactant having an HLB value of 5 to 15. Examples of the surfactant include sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene glycol fatty acid ester, polyoxyethylene alkyl ether, and the like. One or two or more of the above can be appropriately selected and used. The blending amount of the component (C) is not particularly limited, but the weight ratio with the component (A) is preferably (A) :( C) = 1: 0.1 to 1: 1.
Is. When used in this range, it is possible to obtain a W / O / W type emulsified cosmetic composition having further excellent stability.

Component (D) Component (D) is an oil phase component containing 30% or more of silicone oil. Examples of the silicone oil include chain-like or cyclic silicone oils such as dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane. The silicone oil may be volatile or non-volatile. When the silicone oil content in the oil phase component is less than 30%, stickiness occurs and a fresh feel is provided W
/ O / W type emulsion cosmetics cannot be obtained.

Component (D) must contain silicone oil in an amount of 30% or more, but the other oil phase components are not particularly limited as long as they are commonly used in cosmetics. Both vegetable oils and synthetic oils can be used. Specific examples thereof include liquid or pasty hydrocarbons such as liquid paraffin and squalane, waxes, higher fatty acids, higher alcohols, esters, glycerides and the like. The compounding amount of the component (D) is 2 to
40% is preferable. When the content of the component (D) is less than 2%, the emollient effect may be insufficiently expressed, and when it exceeds 40%, stability may be a problem.

The W / O / W type emulsified cosmetic composition of the present invention can be produced by a conventionally known method. For example,
Water phase (internal water phase) in the oil phase containing components (A) and (D)
Is added to obtain a W / O emulsion obtained by dispersion emulsification, or
The W / O emulsion obtained by adding the oil phase to the water phase (inner water phase) and phase inversion emulsification is added to the water phase (outer water phase) containing the components (B) and (C). It can be manufactured by a method such as dispersion emulsification.

The W / O / W type emulsified cosmetic composition of the present invention contains the above-mentioned components (A) to (D) as essential components, and in addition to these essential components, an oily group used in ordinary cosmetics. Agents, powders, surfactants, humectants, ultraviolet absorbers, fragrances, preservatives, coloring agents, cosmetic ingredients and the like can be added within a range that does not impair the effects of the present invention.

The W / O / W emulsified cosmetic composition of the present invention is excellent in stability and feeling of use, and therefore can be applied to various emulsified products such as emulsions, creams and base creams.

[0023]

The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples.

Examples 1 to 7 and Comparative Examples 1 to 7 Emulsions The emulsions shown in Tables 1 and 2 were produced and evaluated for their W / O / W emulsion formation and stability, and usability.

[0025]

[Table 1]

[0026]

[Table 2]

(Manufacturing Method) A: Components 2 to 7 are uniformly mixed and dissolved, and Component 1 is added to this to disperse and emulsify. B: Components 8 to 18 were heated to 60 ° C., A was added to this to disperse and emulsify, and then cooled to obtain an emulsion.

1. Productivity of W / O / W Emulsion The obtained emulsion was observed under a microscope, and the productivity of W / O / W was evaluated according to the following criteria. A: Very good. ◯: Good. Δ: Bad X: Not generated

2. Stability of W / O / W emulsion After leaving each emulsion in a constant temperature bath at 40 ° C for 1 month,
The state of the W emulsion was observed with a microscope and the appearance was observed with the naked eye, and evaluated according to the following criteria. A: Very good. ◯: Good. Δ: Somewhat unstable. X: Obviously unstable.

3. Usability A 20-woman expert evaluation panel evaluated the non-greasiness, the moist feeling and the freshness on a 5-point scale, and further judged from the average point according to the following criteria. (5-level evaluation) 5 points: Very good. 4 points: good. 3 points: Normal. 2 points: Somewhat defective. 1 point: defective. (Judgment) A: Average score of 4.5 or more. ◯: Average score of 3.5 or more and less than 4.5. Δ: Average score of 2.5 points or more and less than 3.5 points. X: Average point less than 2.5 points. The results are shown in Tables 3 and 4.

[0031]

[Table 3]

[0032]

[Table 4]

As is clear from the above results, the examples according to the present invention satisfied all the evaluation items of the productivity and stability of the W / O / W type emulsion and the feeling of use.

Example 8 Cream (ingredient) (%) 1. Purified water 5.0 2. Alkyl ether polyoxyalkylene co-modified 2.5 Organopolysiloxane (Chemical formula 4) 3. Decamethylcyclopentasiloxane 23.0 4. Methylphenyl polysiloxane 10.0 5.2 Cetyl 2-ethylhexanoate 4.0 6. Glyceryl trioctanoate 2.0 7. Liquid paraffin 1.0 8. Stearic acid 3.0 9. Polyoxyethylene sorbitan 1.2 Monooleate (6EO) 10. Polyoxyethylene sorbitan 0.3 Monolaurate (20 EO) 11. Triethanolamine 1.5 12. Dipropylene glycol 8.0 13.1,3-Butylene glycol 5.0 14. Glycerin 3.0 15. Carboxyvinyl polymer 0.5 16. Preservative appropriate amount 17. Suitable amount of perfume 18. Purified water Remaining amount

(Manufacturing Method) A: Components 2 to 8 are uniformly heated and dissolved, and component 1 is added thereto to disperse and emulsify. B: Components 9 to 16 and 18 are uniformly heated and dissolved, and A is added to this to disperse and emulsify. C: B was cooled, and component 17 was added and mixed to obtain a cream. Example 8 was a cream which was excellent in productivity and stability as a W / O / W emulsion and had a good feeling in use.

Example 9 Serum (Component) (%) 1. Purified water 1.0 2. 2. Alkyl polyoxyalkylene co-modified organo 0.5 polysiloxane (having the chemical formula 5) Decamethylcyclopentasiloxane 1.0 4. Methylphenyl polysiloxane 1.0 5. N-stearoyl-L-glutamate sodium 0.05 6. Polyoxyethylene sorbitan 0.2 monooleate (20 EO) 7. Glycerin 5.0 8.1,3-Butylene glycol 5.0 9. Carboxyvinyl polymer 0.1 10. Xanthan gum 0.05 11. Aqueous sodium hydroxide solution (1%) 3.0 12. Preservative proper amount 13. Perfume proper amount 14. Purified water Remaining amount

(Manufacturing Method) A: Components 2 to 4 are uniformly dissolved, and component 1 is added to this to disperse and emulsify. B: Components 5 to 12 and 14 are uniformly dissolved, and A is added to this to disperse and emulsify. C: B was cooled, and component 13 was added and mixed to obtain a serum. Example 9 was a beauty essence that was excellent in the productivity and stability as a W / O / W emulsion, had no stickiness, and had a moist feeling and a freshness.

[0038]

The W / O / W type emulsified cosmetic composition of the present invention is
/ O / W generation and stability are good, and the usability is excellent.

Claims (2)

[Claims] 1. The following components (A) to (D); (A) selected from polyoxyalkylene-modified organopolysiloxane, alkyl ether polyoxyalkylene co-modified organopolysiloxane, and alkyl polyoxyalkylene co-modified organopolysiloxane. One or more kinds (B) Anionic surfactant (C) Nonionic surfactant having an HLB value of 5 to 15 (D) Oil having a silicone oil content of 30% by weight or more in the oil phase component A W / O / W type emulsified cosmetic containing a phase component. 2. The W / O / W type emulsified cosmetic composition according to claim 1, wherein the oil phase component is contained in an amount of 2 to 40% by weight.