JP2003286147A - Oil-in-water type cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare an oil-in-water type cosmetic containing surface-treated fine powder, providing excellent sense of use and having good temporal stability. <P>SOLUTION: This oil-in-water type cosmetic contains (a) the fine powder surface-treated with an organosilicon compound in 10-30 wt.% of the deadweight, (b) a silicone oil, (c) an anionic surfactant and/or a phospholipid and (d) water. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an oil-in-water cosmetic composition, and more particularly to an oil-in-water cosmetic composition which is excellent in usability and stability.

[0002]

2. Description of the Related Art Conventionally, fine particle powder has a strong cohesive force, and it has been necessary to carry out a media type wet dispersion treatment such as a bead mill using a large amount of a powder dispersant and to include it in a cosmetic composition. As the powder dispersant, a high molecular weight surfactant having a high dispersibility can be predominantly selected,
If it is contained in a large amount, it may feel "sticky" or "difficult to spread" on the feeling of use, and conversely, if the content of the powder dispersant is reduced to improve the feeling of use, the powder particles will aggregate. As a result, phenomena such as increase in product viscosity, gelation, and drainage may occur. Particularly in oil-in-water cosmetics, the use of a powder dispersant may affect the emulsification system, causing poor emulsification during emulsification and aggregation or coalescence of emulsified drops over time.

In recent years, SPF has been used in sunscreen cosmetics and the like.
Products with high value (UV protection index) are on the market,
In many cases, they contain a UV absorber and a fine particle powder such as titanium oxide or zinc oxide in combination.
In order to improve the value, in most cases, the fine particle powder is contained in a highly dispersed state. Further, in the case of containing fine particle powder, when dispersed in an aqueous system, there may be a "squeaky feeling" in use feeling, and it is better to disperse it in an oil system.
It is preferable in terms of feel, and if it is an oil-in-water type emulsion system, it is possible to obtain a feel such as freshness and is useful. Various proposals have been made in the past for the technology of dispersing fine particle powder in an oil system, and a stable water-in-oil emulsion is obtained by combining surface-treated powder, silicone oil, and a specific silicone surfactant. As a method for obtaining it, JP-A-63-215
No. 615 and Japanese Patent Laid-Open No. 2001-287737 as a method for obtaining a stable water-in-oil emulsion by combining fine particle powder surface-treated with an organosilicon compound, silicon oil and a specific silicon-based surfactant. There was a suggestion. However, these are water-in-oil types, and it has been difficult to obtain cosmetics which are sufficiently satisfactory in feeling of use such as freshness. Further, as a method for obtaining a stable oil-in-water emulsion by combining surface-treated powder, silicone oil and a specific silicone-based surfactant, JP-A-63-2463.
Although there are proposals in Japanese Patent No. 12 and the like, there is a case where the amount of the surface treatment agent with respect to the powder is not sufficient, and good stability with time may not be obtained.

Therefore, not only oil-in-water type cosmetics containing fine particle powders have excellent stability over time, but also
It has been desired to develop a cosmetic having a good feeling in use.

[0005]

DISCLOSURE OF THE INVENTION The present invention is an oil-in-water type which is blended with a fine particle powder surface-treated with an organosilicon compound, has a light spreadability, is not sticky, has an excellent feeling in use, and is stable over time. The task is to provide cosmetics.

[0006]

In view of such circumstances, the present inventor has conducted diligent studies to solve the above-mentioned problems, and as a result, fine particle powder surface-treated with a specific amount of organosilicon compound, silicon oil, anionic It was found that an oil-in-water cosmetic containing a surfactant and / or phospholipid and water has an excellent feeling of use (lightness of spread, no stickiness) and good stability over time, and completed the present invention. Came to do.

That is, according to the present invention, (a) its own weight is 10 to 3
An oil-in-water cosmetic containing fine particle powder surface-treated with 0% by mass of an organosilicon compound, (b) silicon oil, (c) anionic surfactant and / or phospholipid, and (d) water. . Furthermore, the anionic surfactant of the component (c) is an oil-in-water cosmetic containing polyoxyethylene alkyl ether phosphate ester salt and N-acylmethyl taurine salt. Furthermore, it is an oil-in-water type cosmetic in which the organosilicon compound in the component (a) is a reactive alkyl polysiloxane. Further, the organosilicon compound in the component (a) is an oil-in-water type cosmetic composition in which a reactive alkyl polysiloxane and methyl hydrogen polysiloxane are used. Furthermore, (a)
It is an oil-in-water cosmetic containing 1 to 30 mass% of surface-treated fine particle powder as a component. Furthermore, it is an oil-in-water type cosmetic in which the surface-treated fine particle powder of the component (a) is further surface-treated with a fatty acid. Further, it is an oil-in-water type cosmetic in which the silicone oil as the component (b) is a volatile silicone oil. Further, the surface-treated fine particle powder of the component (a) is titanium oxide,
Oil-in-water type cosmetics which are zinc oxide and cerium oxide.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The structure of the present invention will be described below. The fine particle powder surface-treated with the organosilicon compound as the component (a) used in the present invention is mainly contained in an oil system, and its purpose depends on the kind of the powder, but it is protected from ultraviolet rays. It is intended for effect, coloration, feel adjustment and the like.

In the fine particle powder surface-treated with the organosilicon compound of component (a) used in the present invention, the powder to be treated (base powder) is particularly limited as long as it has a particle size of 1 to 500 nm. It is not a thing, but preferably 5 to 1
00 nm. To specifically exemplify the powder used in the present invention, examples of the fine particle powder having a protective effect against ultraviolet rays include titanium oxide, zinc oxide, zirconium oxide, and cerium oxide. Examples of the feel modifier such as iron include anhydrous silica and barium oxide. Examples of the shape of these powders include spherical shape, needle shape, spindle shape, plate shape, and flaky shape. Among these, examples of the fine particle powder having a high treatment effect by the organosilicon compound include titanium oxide, zinc oxide, and cerium oxide, which have strong surface activity. Further, these powders may be treated with an inorganic component such as silica, alumina or zirconia for the purpose of reducing surface activity. The fine particle powder surface-treated with any of these organosilicon compounds may be used alone or in combination of two or more, if necessary.

The surface treatment amount of the fine particle powder surface-treated with the organosilicon compound of the component (a) used in the present invention is
It is 10 to 30 mass% of its own weight (hereinafter, simply referred to as “%”), and more preferably 13 to 20%. When the amount of the surface treatment agent treated is less than 10% of its own weight, "wetting" of the powder into the dispersion medium is poor, and sufficient dispersibility may not be obtained. When it exceeds 30% of its own weight. In some cases, excessive surface treatment agent may adversely affect the stability of the entire system over time.

Examples of the organosilicon compound as the component (a) used in the present invention include alkoxy-modified polysiloxane, carboxy-modified polysiloxane, epoxy-modified polysiloxane, amino-modified polysiloxane and methylhydrogenpolysiloxane. More specifically, methylhydrogenpolysiloxane represented by the following general formula (1) described in JP-A No. 11-148028 and the following general formula (2) described in JP-A No. 7-196946. And a reactive alkyl polysiloxane represented by These organosilicon compounds may be used alone or in combination of two or more, if necessary.

[Chemical 1] (M and n are integers, m + n = 7 to 50, m: n
= 1: 0.2 to 1: 4)

[Chemical 2] (R independently represents an alkyl group (methyl, ethyl, propyl, etc.), X represents an amino hydrogen group (NH, N
H ₂ ), a halogen atom, a hydroxyl group or an alkoxy group, Y is a direct bond or a divalent hydrocarbon group (methylene, ethylene, butylene, etc.), and those hydrogen atoms are substituted with other substituents. May be, p is 1
~ Represents an integer of 3 and q represents 25 to 100)

In the present invention, it is also possible to further perform a powder surface treatment with a fatty acid on the organosilicon compound treating agent for the purpose of further improving the compatibility with oil agents other than silicone oil usually used in cosmetics. .

Specific examples of the fatty acid used in the present invention include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid and the like, and the treatment amount thereof is fatty acid / fine particle powder. = 0.1 /
If it is 10 to 1/5, the effect can be expected. These fatty acids can be used alone or in combination of two or more, if necessary.

The content of the organosilicon compound surface-treated fine particle powder of the component (a) used in the present invention is not particularly limited, but is 1 to 30% by mass (hereinafter, simply referred to as "%").
Is described), and more preferably 5 to 20%.

The component (b) silicone oil used in the present invention is contained for the purpose of improving the dispersibility of the component (a) powder and improving the feeling of use such as good spreadability and non-stickiness. If specifically exemplified, linear dimethyl polysiloxane, branched dimethyl polysiloxane, cyclic dimethyl polysiloxane,
Methylphenyl polysiloxane, perfluoropolysiloxane, and the like. Among them, a non-volatile linear dimethyl polysiloxane having a high affinity with the organosilicon compound to be processed into powder, from the viewpoint of easily obtaining the dispersion improving property. Or volatile cyclic or linear dimethyl polysiloxane can be mentioned as a preferable example. These silicone oils can be used alone or in combination of two or more, if necessary. The content of the silicone oil of the component (b) is not particularly limited,
It is preferably 50%, more preferably 5 to 30%.

The anionic surfactant and / or phospholipid as the component (c) used in the present invention is contained as an emulsifier for an oil-in-water type cosmetic composition. Further, the anionic surfactant and / or phospholipid of the component (c) contributes to the improvement of dispersion stability of the organosilicon compound surface-treated fine particle powder of the component (a), thereby improving the stability of the oil-in-water cosmetic over time. Significantly improve. Further, it also contributes to improving the feeling of use such as non-stickiness during use. Component (c) used in the present invention
The anionic surfactant of is not particularly limited as long as it is usually used in cosmetics, but if specifically exemplified, such as lauric acid, myristic acid, palmitic acid, stearic acid, and isostearic acid. N-acyl methyl taurine salts such as sodium salt or triethanol amine salt of fatty acid, cocoyl methyl taurine sodium, lauroyl methyl taurine sodium, myristoyl methyl taurine sodium, palmitoyl methyl taurine sodium, stearoyl methyl taurine sodium, polyoxyethylene lauryl ether phosphoric acid, Polyoxyethylene alkyl ether phosphors such as polyoxyethylene cetyl ether phosphoric acid, polyoxyethylene oleyl ether phosphoric acid, polyoxyethylene nonylphenyl ether phosphoric acid Such as esters and salts thereof. Among these, polyoxyethylene alkyl ether phosphate ester salts and N-acyl methyl taurine salts are preferable from the viewpoints of stability over time and the effect of improving the usability.
Further, the phospholipid of the component (c) is not particularly limited as long as it is usually used in cosmetics, but if it is specifically exemplified, it is phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidyl. Examples thereof include phospholipids such as inositol, sphingophospholipids, soybean lecithin, egg yolk lecithin, and hydrogenated products thereof, and phospholipid complexes such as phospholipid / cholesterol complexes and phospholipid / phytosterol complexes. These component (c) anionic surfactants and / or phospholipids can be used by appropriately selecting one kind or two or more kinds as necessary.

The content of the anionic surfactant and / or phospholipid as the component (c) used in the present invention is not particularly limited, but is preferably 0.1 to 10%, more preferably 1 ~ 5%.

The water as the component (d) used in the present invention is contained for the purpose of obtaining the solvent of the aqueous component and the wateriness of the texture.

The oil-in-water cosmetic of the present invention contains, in addition to the above-mentioned essential components, components used in ordinary cosmetics, specifically, surfactants other than those mentioned above, water-soluble polymers and polyhydric alcohols. , Lower alcohol, antioxidant, bactericide, preservative,
Fragrances, pH adjusters, waxes, oil-based gelling agents, cosmetic ingredients and the like can be used within a range that does not impair the effects of the present invention. The oil-in-water cosmetic of the present invention can be obtained by a usual method for producing cosmetics, and the production method is not particularly limited.

The oil-in-water cosmetic composition of the present invention exhibits excellent effects only when a combination of the above essential components is used. That is, the component (a), which is fine particle powder surface-treated at a specific ratio, can be easily dispersed in the oil system containing the component (b), silicon oil, and may be felt to be sticky to the touch. Without the use of certain dispersion stabilizers,
Or it can be reduced without limit. The component (c) which is an anionic surfactant and / or a phospholipid can appropriately emulsify an oil-based component containing the components (a) and (b) in an aqueous system. That is, the oil-in-water cosmetic of the present invention has a light spread during use only when using this combination,
It does not feel sticky after use, has good stability over time, and has an excellent function that cannot be achieved by other combinations.

The oil-in-water type cosmetic of the present invention can be applied to beauty essences, sunscreens, massages, makeups, makeup bases and the like.

[0022]

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

Table 1 shows composition examples 1 to 8 of fine particles of surface-treated organosilicon compound, and Table 2 shows examples 1 to 6 and comparative examples 1 to 3 of oil-in-water cosmetics containing the surface-treated powder. . Stability over time (gelation) of the obtained oil-in-water cosmetics,
The feeling of use (lightness and non-stickiness) was evaluated, and the results are shown in Table 2 together.

[0024]

[Table 1]

[0025]

[Table 2]

<Manufacturing Method> A. The components (1) to (11) are uniformly mixed and dispersed at 70 ° C. B. Ingredients (12) to (16) are uniformly mixed at 70 ° C. C. The B component is added to the A component, emulsified, and cooled to obtain an oil-in-water cosmetic.

(Evaluation method: stability over time (gelation)) Each sample was stored in a constant temperature bath at 40 ° C. for 3 months, and the appearance change (gelation) was evaluated as follows (a) based on the state immediately after preparation. ) 4
Judgment was made using a graded criterion.

(B) Four-step judgment standard (Evaluation) (Judgment) No change: ◎ There is a slight change: ○ There is some change: △ Significant change: ×

(Evaluation method: feeling of use) Professional evaluation panel 10
For each sample, the feeling of use (lightness and non-stickiness) is evaluated by 5 levels according to the following (b) evaluation criteria, and the average value of each sample is (c) 4 level judgment It was judged using a standard.

(A) Five-level evaluation standard (Score): (Evaluation) 4: Very good 3: Good 2: Does not change 1: Somewhat bad 0: bad (B) 4-step judgment criteria (Average score): (Judgment) 3.5 or higher: ◎ 2.5 or more and less than 3.5: ○ 1.5 or more and less than 2.5: △ Less than 1.5: ×

As is clear from the results shown in Table 2, the oil-in-water cosmetics of Examples 1 to 6 of the present invention did not gel and were excellent in stability over time as compared with Comparative Examples 1 to 3, and were excellent in stability during use. It was an excellent oil-in-water type cosmetic which spreads lightly and has no stickiness.

[0032]   Example 7: Sunscreen       (Component) (%) 1. Powder 10 obtained in Composition Example 3 2. Powder 10 obtained in Composition Example 4 3. Decamethylcyclopentasiloxane 20 4. Stearic acid 1.5 5. Cetostearyl alcohol 1 6. Glycerin fatty acid ester 1 7. Polyoxyethylene (20) monooleate sol     Bitan 0.3 8. Sorbitan sesquioleate 0.3 9. Hydrogenated soybean phospholipid 0.5 10. Fragrance suitable amount 11. Purified water Remaining amount 12.1,3-Butylene glycol 10 13. Methylparaben 0.3 14. Xanthan gum 0.15 15. Sodium hydroxide 0.09

<Manufacturing Method> A. The components (1) to (10) are uniformly mixed and dispersed at 70 ° C. B. Ingredients (11)-(15) are uniformly mixed at 70 ° C. C. The B component is added to the A component and emulsified, followed by cooling to obtain a sunscreen.

The sunscreen obtained in Example 7 was excellent in stability over time, spreads lightly during use, and was an excellent sunscreen without stickiness.

[0035]   Example 8: Sunscreen       (Component) (%) 1. Powder 10 obtained in Composition Example 3 2. Decamethylcyclopentasiloxane 10 3. Hydrogenated soybean phospholipid 2 4. Cholesterol 1 5. Behenyl alcohol 1 6. Glyceryl tri-2-ethylhexanoate 10 7. 2-Ethylhexyl paramethoxycinnamate 7.5 8.4-tert-Butyl-4'-methoxydibenzoyl     Methane 2 9. Tocopherol acetate 0.5 10. Fragrance suitable amount 11. Purified water Remaining amount 12.1,3-Butylene glycol 15 13. Glycerin 2 14. Methylparaben 0.3

<Manufacturing Method> A. The components (1) to (10) are uniformly mixed and dispersed at 70 ° C. B. Ingredients (11) to (14) are uniformly mixed at 70 ° C. C. The B component is added to the A component and emulsified, followed by cooling to obtain a sunscreen.

The sunscreen obtained in Example 8 was excellent in stability over time, had a light spread during use and was not sticky, and was an excellent sunscreen.

[0038]   Example 9: Sunscreen       (Component) (%) 1. Hydrogenated soybean phospholipid 0.5 2. Sucrose fatty acid ester 1 3. Polyoxyethylene (60) hydrogenated castor oil 0.5 4. Methylparaben 0.3 5.1,3-butylene glycol 5 6. Dipropylene glycol 8 7. Powder 5 obtained in Composition Example 5 8. Decamethylcyclopentasiloxane 5 9. Dimethyl polysiloxane 1 10. Cetostearyl alcohol 1 11. Glyceryl tri-2-ethylhexanoate 5 12. Fragrance suitable amount 13. Purified water Remaining amount 14. Triethanolamine Suitable amount 15.1,3-Butylene glycol 1 16. Xanthan gum 0.15 17. Dipotassium glycyrrhizinate 0.2

<Manufacturing Method> A. The components (1) to (12) are uniformly mixed and dispersed at 70 ° C. B. Ingredients (13)-(17) are uniformly mixed at 70 ° C. C. The B component is added to the A component and emulsified, followed by cooling to obtain a sunscreen.

The sunscreen obtained in Example 9 was excellent in stability over time, lightly spreads during use, and was not sticky.

[0041]

As described above in detail, the oil-in-water cosmetic composition of the present invention is excellent in the feeling of use (lightness of spread and non-stickiness) and has good stability over time.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 24, 2003 (2003.3.2
4)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

[0001]

TECHNICAL FIELD The present invention relates to surface-treated fine particles.
More specifically, the present invention relates to an oil-in-water cosmetic containing child powder, and more particularly to a water-in-oil cosmetic excellent in usability and stability.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

In the fine particle powder surface-treated with the organosilicon compound of component (a) used in the present invention, the powder to be treated (base powder) is particularly limited as long as it has a particle size of 1 to 500 nm. It is not a thing, but preferably 5 to 1
00 nm. To specifically exemplify the powder used in the present invention, examples of the fine particle powder having a protective effect against ultraviolet rays include titanium oxide, zinc oxide, zirconium oxide, and cerium oxide. Examples of the feel modifier such as iron include anhydrous silica and barium oxide. Examples of the shape of these powders include spherical shape, needle shape, spindle shape, plate shape, and flaky shape. The high particle powders of treatment effect by the organic silicon compound Among these, strong surface activity, titanium oxide, zinc oxide, can be exemplified cerium oxide. Further, these powders may be treated with an inorganic component such as silica, alumina or zirconia for the purpose of reducing surface activity. The fine particle powder surface-treated with any of these organosilicon compounds may be used alone or in combination of two or more, if necessary.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 4C083 AB032 AB051 AB211 AB212                       AB241 AB242 AC062 AC122                       AC172 AC242 AC342 AC422                       AC432 AC442 AC482 AC542                       AC791 AC792 AC901 AC902                       AD042 AD092 AD151 AD152                       AD172 AD352 AD492 AD532                       AD571 AD572 AD662 BB05                       BB25 CC19 DD33 EE17

Claims (8)

[Claims] 1. The following components (a) to (d); (a) Fine particle powder surface-treated with an organic silicon compound in an amount of 10 to 30% by weight of its own weight (b) Silicon oil (c) Anionic surfactant. An oil-in-water cosmetic, comprising an agent and / or phospholipid (d) water. 2. The (c) component anionic surfactant comprises:
The oil-in-water cosmetic composition according to claim 1, which is a polyoxyethylene alkyl ether phosphate ester salt or a N-acyl methyl taurine salt. 3. The oil-in-water cosmetic according to claim 1, wherein the organosilicon compound in the component (a) is a reactive alkyl polysiloxane. 4. The oil-in-water according to any one of claims 1 to 3, wherein the organosilicon compound in the component (a) is a reactive alkyl polysiloxane and a methyl hydrogen polysiloxane. Type cosmetics. 5. A surface-treated fine particle powder of component (a)
30 mass% is contained, The oil-in-water type cosmetics in any one of Claims 1-4 characterized by the above-mentioned. 6. The surface-treated fine particle powder of component (a) is further surface-treated with a fatty acid.
5. The oil-in-water cosmetic according to any one of 5 to 5. 7. The oil-in-water cosmetic composition according to claim 1, wherein the component (b) silicone oil is a volatile silicone oil. 8. The oil-in-water makeup according to any one of claims 1 to 7, wherein the surface-treated fine particle powder of the component (a) is titanium oxide, zinc oxide, or cerium oxide. Fee.