KR20030078730A - Oil-in-Water Type Cosmetics - Google Patents

Abstract

The present invention provides an oil-in-water cosmetic containing surface-treated fine particle powder and having excellent usability and good stability over time.

(a) fine particle powder surface-treated with 10-30 mass% organosilicon compound with respect to the mass of the fine particle powder (mother powder) before surface treatment,

(b) silicone oil,

(c) anionic surfactants and / or phospholipids, and

(d) water

Oil-in-water cosmetics comprising a.

Description

Oil-in-Water Cosmetics {Oil-in-Water Type Cosmetics}

The present invention relates to an oil-in-water cosmetic containing surface-treated fine powder, and more particularly, to an oil-in-water cosmetic excellent in feeling and stability.

Conventionally, since the fine particle powder has a strong cohesive force, a large amount of powder dispersant has to be contained in cosmetics by performing media wet dispersion treatment such as bead mill. As a powder dispersant, a high molecular weight surfactant having a high dispersibility may be preferable, but when it is contained in a large amount, a feeling such as "stickiness" or "deterioration of spreading" may be felt during use, and conversely, an improvement in the feeling of use For this purpose, when the content of the powder dispersant is reduced, the powders agglomerate, and as a result, a phenomenon such as an increase in the viscosity of the product, gelation or drainage may occur. In particular, in oil-in-water cosmetics, the use of the powder dispersant affects the emulsification system, and in some cases, emulsification failure during emulsification and emulsification aggregation or fusion over time may occur.

Recently, products having a high SPF value (ultraviolet ray defense index) have been sold in sunscreen cosmetics and the like, but these often contain a UV absorber and fine powder such as titanium oxide and zinc oxide in combination, and in order to improve the SPF value, In most cases, the fine particles are contained in a highly dispersed state. In addition, in the case of containing the fine particle powder, when dispersed in an aqueous system, there may be a feeling of "skin pulling" on the use feeling, and it is preferable to disperse it in an oil system, and if it is an oil-in-water emulsion type, it can feel a moist feeling. It is useful. Various techniques have been conventionally proposed for dispersing fine powders in oils. Japanese Patent Laid-Open No. 63-215615 discloses a method for obtaining a stable water-in-oil emulsion by combining surface-treated powders and silicone oils with specific silicone surfactants. Japanese Patent Laid-Open No. 2001-278737 et al. Proposes a method for obtaining a stable water-in-oil emulsion using a combination of a particulate powder surface-treated with an organosilicon compound and a silicone oil and a specific silicone surfactant. However, they were in a situation where it is difficult to obtain cosmetics that can be sufficiently satisfied with the use of moisture such as moisture in water-in-oil.

In addition, Japanese Patent Application Laid-Open No. 63-246312 proposes a method of obtaining a stable oil-in-water emulsion by combining a surface-treated powder, a silicone oil, and a specific silicone-based surfactant. The amount may not be sufficient in some cases, and good time-lapse stability may not be obtained.

Therefore, in the oil-in-water cosmetic containing fine powder, it has been desired to develop high-quality cosmetics which are excellent in stability over time and excellent in usability.

An object of the present invention is to provide an oil-in-water cosmetic that is blended with an organosilicon compound and blended with fine powder, which is light in spreading and non-sticky, and has excellent usability and good stability over time.

In view of these circumstances, the present inventors have diligently studied to solve the above problems, and as a result, the present inventors have found that they contain particulate powder, silicone oil, anionic surfactant and / or phospholipid and water surface-treated with a specific amount of organosilicon compound. The oil-in-water cosmetics were found to have excellent usability (no spreading, no stickiness), good stability over time, and completed the present invention.

That is, the present invention is (a) particulate powder surface-treated with an organosilicon compound of 10 to 30% by mass relative to the mass of the particulate powder (primary powder) before surface treatment, (b) silicon oil, (c) anionic interface Oil-in-water cosmetic containing an active agent and / or phospholipid and (d) water. The anionic surfactant of component (c) is one or two or more oil-in-water cosmetics selected from polyoxyethylene alkyl ether phosphate ester salts and N-acylmethyltaurine salts. Furthermore, the organosilicon compound in component (a) is an oil-in-water cosmetic which is a reactive alkyl polysiloxane. Furthermore, the organosilicon compound in component (a) is an oil-in-water cosmetic which is a reactive alkyl polysiloxane and methylhydrogenpolysiloxane. Moreover, it is an oil-in-water cosmetic containing 1-30 mass% of surface-treated fine particle powder of component (a) with respect to the total mass of an oil-in-water cosmetic. In addition, the surface-treated fine particle powder of component (a) is the oil-in-water cosmetic which is further surface-treated by fatty acid. The silicone oil of component (b) is an oil-in-water cosmetic which is a volatile silicone oil. The surface-treated fine particle powder of component (a) is one or two or more oil-in-water cosmetics selected from titanium oxide, zinc oxide, and cerium oxide.

Embodiments of the Invention

Hereinafter, the structure of this invention is demonstrated.

The fine particle powder surface-treated with the organosilicon compound of component (a) used in the present invention is mainly contained in an oil type, and the purpose thereof is different depending on the type of powder. It is to be done. In addition, in this invention, surface treatment means coating the surface of the particle | grains of particulate powder with an organosilicon compound.

In the particulate powder surface-treated with the organosilicon compound of component (a) used in the present invention, the powder (parent powder) to be treated is not particularly limited as long as the average particle size is in the range of 1 to 500 nm, and preferably the average particle size Ranges from 5 to 100 nm. Specific examples of the powder used in the present invention include titanium oxide, zinc oxide, zirconium oxide, cerium oxide, and the like as the fine particle powder having an ultraviolet protective effect, and iron oxide and the like as a colorant, and the like as a texture regulator. And anhydrous silica, barium sulfate, etc. are mentioned. Examples of the shape of these powders include spherical shape, needle shape, fusiform shape, plate shape, and flake shape. In addition, the average particle diameter of acicular, fusiform, plate, and flaky powder shows the average length of the longest side. Among these, as a fine particle powder with a high treatment effect by an organosilicon compound, titanium oxide, zinc oxide, and cerium oxide with strong surface activity can be illustrated. In addition, these powders may be processed with inorganic components, such as silica, alumina, and zirconia, for the purpose of reducing surface activity. The fine particle powder surface-treated with such an organosilicon compound can be used 1 type or in combination of 2 or more types as needed. As a method for measuring the average particle diameter of the powder, for example, the measurement of the length of the fine particle powder by an electron micrograph or the measurement by a commercially available particle size measuring instrument such as a Coulter counter (manufactured by Coulter Electronics) can be used.

The surface treatment amount of the particulate powder surface-treated with the organosilicon compound of component (a) used in the present invention is 10 to 30 mass% (hereinafter only "%") based on the mass of the particulate powder (the parent powder) before the surface treatment. In addition, in this specification, "mass%" means the same as "weight%"), More preferably, it is 13 to 20%. When the throughput of the organosilicon compound is less than 10% with respect to the mass of the fine particle powder (the parent powder) before the surface treatment, the "moistness" to the dispersion medium of the powder is poor, and sufficient dispersibility may not be obtained, and the surface treatment may be performed. When it exceeds 30% with respect to the mass of the previous fine particle powder (parent powder), the excess organosilicon compound may adversely affect the time-lapse stability of the whole system.

Examples of the organosilicon compound of component (a) used in the present invention include alkoxy-modified polysiloxanes, carboxy-modified polysiloxanes, epoxy-modified polysiloxanes, amino-modified polysiloxanes, and methylhydrogenpolysiloxanes. More specifically, the methylhydrogenpolysiloxane represented by the following general formula (1) described in Japanese Patent Laid-Open No. 11-148028, and the general formula (2) described in Japanese Patent Laid-Open No. 7-196946 The reactive alkyl polysiloxane represented by is mentioned. Such an organosilicon compound can be used 1 type or in combination of 2 or more types as needed.

m and n are each an integer, m + n = 7-50, m: n = 1: 0.2-1: 4.

In the above formula, R independently represents an alkyl group (methyl, ethyl, propyl, etc.), X represents an aminohydrogen group (NH, NH ₂ ), a halogen atom, a hydroxyl group or an alkoxy group, and Y represents a direct bond or a divalent Hydrocarbon groups (methylene, ethylene, butylene, etc.) are shown, these hydrogen atoms may be substituted by other substituents, p represents the integer of 1-3, and q represents 25-100.

In the present invention, the surface treatment refers to coating the surface of the particles of the particulate powder with an organosilicon compound, but the surface treatment of the normal powder for the method for producing the particulate powder surface-treated with the organosilicon compound of the component (a) of the present invention. A method can be used and it can manufacture according to the method of Unexamined-Japanese-Patent No. 11-148028 and Unexamined-Japanese-Patent No. 7-l96946 as a specific method.

In the present invention, it is also possible to further perform powder surface treatment with fatty acids on the organosilicon compound treatment agent for the purpose of further improving the compatibility with oils other than silicone oils normally used in cosmetics. Surface treatment with fatty acids may be carried out before, after or simultaneously with treatment with the organosilicon compound for the particulate powder.

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 throughput is the mass ratio of fatty acid / particulate powder (hereinafter referred to as "mass ratio"). "Is the same meaning as" weight ratio "), fatty acid / fine particles = 0.1 / 10 to 1/5, the effect can be expected. Such fatty acids can be used alone or in combination of two or more as necessary. In addition, when performing powder surface treatment by fatty acid, it is preferable that it is the mass ratio of total throughput / particulate powder as a total throughput which included the organosilicon compound in particulate powder, and total throughput / particulate powder = 11 / 100-50 / 100. .

Although content of the organosilicon compound surface treatment fine particle powder of component (a) used for this invention is not specifically limited, 1-30% is preferable with respect to the total mass of oil-in-water cosmetics, More preferably, it is 5 to 20% to be.

The silicone oil of the component (b) used in the present invention is contained for the purpose of improving the dispersibility of the powder of the component (a) and improving the usability such as the advantage of spreading or no stickiness. The lower surface is straight-chain dimethylpolysiloxane, branched dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, perfluoropolysiloxane and the like, and among them, from the viewpoint of easily obtaining dispersion improvement properties, the non-volatile and high affinity with the organosilicon compound treated to the powder. The linear dimethyl polysiloxane and the volatile cyclic or linear dimethylpolysiloxane of are mentioned as a preferable thing. Such silicone oil can be used 1 type or in combination of 2 or more types as needed. Although content of the silicone oil of component (b) is not specifically limited, 1-50% is preferable with respect to the total mass of oil-in-water cosmetics, More preferably, it is 5-30%.

Anionic surfactants and / or phospholipids of component (c) used in the present invention are those contained as emulsifiers in oil-in-water cosmetics. In addition, the anionic surfactant and / or phospholipid of component (c) contributes to the improvement of dispersion stability of the organosilicon compound surface-treated fine particle powder of component (a), thereby remarkably improving the time course stability of the oil-in-water cosmetic. In addition, it contributes to the improvement of feeling such as no stickiness during use. The anionic surfactant of component (c) to be used in the present invention is not particularly limited as long as it is normally used in cosmetics. Specific examples thereof include lauric acid, myristic acid, palmitic acid, stearic acid and isostearic acid. N-acylmethyltaurine salts, such as fatty acid sodium salt or triethanolamine salt, sodium cocoylmethyltaurine, sodium lauroylmethyltaurine, sodium myristoylmethyltaurine, sodium palmitylmethyltaurine, and sodium stearoylmethyltaurine Polyoxyethylene alkyl ether phosphoric acid esters such as oxyethylene lauryl ether phosphoric acid, polyoxyethylene cetyl ether phosphoric acid, polyoxyethylene oleyl ether phosphoric acid, polyoxyethylene nonylphenyl ether phosphoric acid, and salts thereof. Moreover, sodium, potassium, triethanolamine, monoethanolamine, arginine, etc. are mentioned as an alkali chemicals for making a salt. Among these, polyoxyethylene alkyl ether phosphate ester salt and N-acyl methyl taurine salt are preferable from a viewpoint of time-lapse stability and a usability improvement effect. In addition, the phospholipid of component (c) is not particularly limited as long as it is normally used as a cosmetic, but specifically phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidylinositol, spinophospholipid, soy lecithin, egg yolk lecithin, or Phospholipid complexes, such as these hydrogenated substances, and phospholipid complexes, such as a phospholipid / cholesterol complex and a phospholipid / phytosterol complex. These component (c) anionic surfactants and / or phospholipids may be appropriately selected from one type or two types or more as necessary.

The content of the anionic surfactant and / or phospholipid of the component (c) used in the present invention is not particularly limited, but is preferably 0.1 to 10%, more preferably 1 to 5, based on the total mass of the oil-in-water cosmetic. %to be.

The water of component (d) used in the present invention is contained for the purpose of dissolving the aqueous component and obtaining a moist feeling.

The oil-in-water cosmetic of the present invention is a component used in more conventional cosmetics, specifically surfactants, water-soluble polymers, polyhydric alcohols, lower alcohols, antioxidants, fungicides, preservatives, flavoring agents, pH adjusters, waxes, An oil-based gelling agent, a cosmetic component, etc. can be added to the said essential component in the range which does not impair the effect of this invention, and can be used. The oil-in-water cosmetic of this invention is obtained by the method of manufacturing a normal cosmetics, The manufacturing method is not specifically limited. For example, oil-in-water cosmetics can be obtained by adding and mixing an aqueous system to an oil system containing particulate powder, silicone oil, anionic surfactant, and phospholipid surface-treated with an organosilicon compound.

The oil-in-water cosmetic of the present invention obtains an excellent effect only when the combination of the essential ingredients is used. That is, component (a), which is a particulate powder surface-treated at a specific ratio, can be easily dispersed in an oil system containing silicone oil, which is component (b), and does not use a dispersion stabilizer even when it feels sticky on the touch. Or can be reduced without limitation. In addition, the component (c) which is an anionic surfactant and / or phospholipid can appropriately emulsify the oil-based component containing the components (a) and (b) in water. That is, in the oil-in-water cosmetic of the present invention, the component (c) is easy to spread at the time of use only when the present combination is used, does not feel stickiness after use, and also has good stability over time, and can be obtained in other combinations. It has no excellent features.

The oil-in-water cosmetic of the present invention can be applied to cosmetic liquids, sunscreens, massages, make-up, makeup bases and the like.

<Example>

Next, although an Example is given and this invention is demonstrated in more detail, this invention is not restrict | limited at all by these.

Examples 1 to 8 of organosilicon compound surface-treated fine particle powder compositions are shown in Table 1, and Examples 1 to 6 and Comparative Examples 1 to 3 of oil-in-water cosmetics containing surface-treated powders are shown in Table 2 below. About the obtained oil-in-water cosmetics, time-lapse stability (gelling) and usability (lightness of spreading, no stickiness) were evaluated, and the result was combined with Table 2 below.

Composition example 1 Composition example 2 Composition example 3 Composition example 4 Composition example 5 Composition example 6 Composition example 7 Composition example 8 Powder weight Zinc oxide Titanium oxide Zinc oxide Titanium oxide Titanium oxide Zinc oxide Titanium oxide Zinc oxide Particle size (nm) 40 20 20 15 20 20 100 200 Surface Treatment Agent (Organic Silicon Compound) Reactive alkyl polysiloxanes Reactive alkyl polysiloxane / methylhydroxypolysiloxane = 10/3 Reactive alkyl polysiloxane / methylhydroxypolysiloxane = 10/3 Reactive alkyl polysiloxane / methylhydroxygenpolysiloxane = 3/1 Reactive alkyl polysiloxane / methylhydroxygenpolysiloxane = 2/1 Reactive alkyl polysiloxane / methylhydroxypolysiloxane = 10/3 Reactive alkyl polysiloxanes Reactive alkyl polysiloxane / methylhydroxypolysiloxane = 10/3 Organosilicon Compound Surface Throughput (Mass Ratio at 100 Molecular Weights) 5 13 13 20 15 13 10 30 Surface treatment agent (fatty acid) - - Myristic acid - - - - Stearic acid Fatty acid surface throughput (mass ratio when the parent powder is 100) - - 3 - - - - 3

ingredient Example (%) Comparative Example (%) One 2 3 4 5 6 One 2 3 One Powder obtained in the composition example 1 - - - - - - 10 - - 2 Powder obtained in the composition example 3 One - - 15 - 10 - 10 10 3 Powder obtained in the composition example 4 - 5 - 15 One - - - - 4 Powder obtained in the composition example 5 - - 20 - - - - - - 5 N-Stearoylmethyltaurine Sodium 0.1 One 5 3 10 2 2 - 2 6 Behenyl Alcohol One - 3 One 5 3 3 3 3 7 Polyoxyethylene (10) Cured Castor Oil - - - - - - - One - 8 Polyoxyethylene (60) Cured Castor Oil - One One One - - - One - 9 Decamethylcyclopentasiloxane One 5 30 20 50 15 15 15 - 10 Paramethoxycinnamic acid-2-ethylhexyl - 5 5 5 - 5 5 5 5 11 2-ethyl cetyl hexanoate - 3 3 3 - 3 3 3 3 12 Purified water Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount 13 Dipropylene glycol 15 15 10 10 10 15 15 15 15 14 Methylparaben 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 15 Sodium hydroxide 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 0.06 16 Carboxyvinyl Polymer 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Evaluation item Time-lapse Stability (Gelation) ◎ ◎ ◎ O O ◎ X X O Usability (easiness of spread) O ◎ ◎ O ◎ ◎ O O X Usability (no stickiness) O ◎ ◎ O ◎ ◎ O △ X

<Manufacturing method>

A and components (1) to (11) are uniformly mixed and dispersed at 70 ° C.

B, components 12-16 are mixed uniformly at 70 degreeC.

C. Add component B to component A to emulsify and obtain oil-in-water cosmetic.

(Evaluation method: time course stability (gelling))

Each sample was stored in a 40 degreeC thermostat for 3 months, and the change of the appearance (gelation) was judged using the following four steps of criteria based on the state immediately after manufacture.

(A) Fourth Level Criteria

(Evaluation) (judgment)

No change: ◎

Minor changes: ○

Slightly changed: △

Considerable change: ×

(Evaluation method: Feeling)

Ten expert evaluation panels evaluated each sample for five levels of feeling (no lightness and no stickiness) on the following (b) evaluation criteria, and the average value of each sample was evaluated for four levels. Judgment was made using criteria.

(A) Five-stage evaluation criteria

(Rating): (rating)

4: very good

3: good

2: unchanged

1: slightly worse

0: bad

(B) Level 4 Judging Criteria

(Average score): (judgment)

3,5 or more: ◎

2.5 or more, less than 3.5: ○

1.5 or more, less than 2.5: △

Less than 1.5: ×

As is clear from the results of Table 2, the oil-in-water cosmetics of Examples 1 to 6 of the present invention do not gelate compared to Comparative Examples 1 to 3, have excellent stability over time, and are easy to spread during use, and have a stickiness. There was no excellent oil-in-water cosmetic.

Example 7: Sunscreen

(ingredient)(%)

1. Powder 10 obtained in Composition Example 3

2. Powder 10 obtained in Composition Example 4

3. Decamethylcyclopentasiloxane 20

Stearic acid1.5

5. Cetostearyl Alcohol 1

6. Glycerin Fatty Acid Ester 1

7. Polyoxyethylene (20) monosorbate sorbitan 0.3

8. Cesuki oleate sorbitan 0.3

9. Hydrogenated Soybean Phospholipid 0.5

10. Spices appropriate amount

11. Residual water remaining

12. 1,3-butylene glycol 10

13. Methylparaben 0.3

14. xanthan gum0.15

15. Sodium Hydroxide 0.09

<Manufacturing method>

A. The components (1) to (10) are mixed and dispersed uniformly at 70 ° C.

B. Components (11) to (15) are mixed uniformly at 70 ° C.

C. Add component B to component A to emulsify and cool to obtain a sunscreen.

The ultraviolet blocking material obtained in Example 7 was an excellent ultraviolet blocking material which was excellent in time-lapse stability, was light in spreading, and had no stickiness at the time of use.

Example 8: Sunscreen

(ingredient) (%)

1. Powder 10 obtained in the composition example 3

2. Decamethylcyclopentasiloxane 10

3. Hydrogenated Soybean Phospholipids 2

4. Cholesterol 1

5. Behenyl Alcohol 1

6. Glyceryl tri-2-ethylhexanoate 10

7. Palladiummethoxycinnamic acid-2-ethylhexyl 7.5

8. 4-tert-butyl-4'-methoxydibenzoylmethane 2

9.Tocopherol Acetate0.5

10. appropriate amount of spices

11. Residual Purified Water

12. 1,3-butylene glycol 15

13. Glycerin 2

14. Methylparaben 0.3

<Manufacturing method>

A. The components (1) to (10) are mixed and dispersed uniformly at 70 ° C.

B. Components 11 to 14 are mixed uniformly at 70 ° C.

C. Add component B to component A to emulsify and cool to obtain a sunscreen.

The ultraviolet blocking material obtained in Example 8 was an excellent ultraviolet blocking material which was excellent in time-lapse stability, was light in spreading in use, and was not sticky.

Example 9: sunscreen

(ingredient)(%)

Hydrogenated soybean phospholipid 0.5

2. Sucrose Fatty Acid Ester 1

3. Polyoxyethylene (60) Cured Castor Oil 0.5

4. Methylparaben 0.3

5. 1,3-butylene glycol 5

6. Dipropylene Glycol 8

7. Powder 5 obtained in the composition example 5

8.Decamethylcyclopentasiloxane 5

9. Dimethylpolysiloxane 1

10.cetostearyl alcohol 1

11. Tri-2-ethylhexanoic acid glyceryl 5

12. Spices

13. Refining water level

14. Triethanolamine Equivalent

15. 1,3-butylene glycol 1

16.Xan Rubber0.15

17. Dipotassium Glytilinate 0.2

<Manufacturing method>

A. The components (1) to (12) are mixed and dispersed uniformly at 70 ° C.

B. Components (13) to (17) are mixed uniformly at 70 ° C.

C. Add component B to component A to emulsify and cool to obtain a sunscreen.

The ultraviolet blocking material obtained in Example 9 was an excellent ultraviolet blocking material which was excellent in time-lapse stability, was light in spreading in use, and was not sticky.

As mentioned above, the oil-in-water cosmetic of the present invention is excellent in the usability (easy to spread, no stickiness), and also has good stability over time.

Claims (8)

(a) fine particle powder surface-treated with 10-30 mass% organosilicon compound with respect to the mass of the fine particle powder (mother powder) before surface treatment, (b) silicone oil, (c) anionic surfactants and / or phospholipids, and (d) water Oil-in-water cosmetics comprising a. The oil-in-water cosmetic according to claim 1, wherein the anionic surfactant of component (c) is one or two or more selected from polyoxyethylene alkyl ether phosphate ester salts and N-acylmethyltaurine salts. The oil-in-water cosmetic according to claim 1 or 2, wherein the organosilicon compound in component (a) is a reactive alkylpolysiloxane. The oil-in-water cosmetic according to claim 1 or 2, wherein the organosilicon compound in component (a) is a reactive alkylpolysiloxane and methylhydrogenpolysiloxane. The oil-in-water cosmetic according to any one of claims 1 to 4, wherein the surface-treated fine particle powder of the component (a) is contained in an amount of 1 to 30% by mass based on the total mass of the oil-in-water cosmetic. The oil-in-water cosmetic according to any one of claims 1 to 5, wherein the surface-treated fine particle powder of component (a) is further surface treated with fatty acid. The oil-in-water cosmetic according to any one of claims 1 to 6, wherein the silicone oil of component (b) is a volatile silicone oil. The oil-in-water cosmetic according to any one of claims 1 to 7, wherein the surface-treated fine particle powder of component (a) is one or two or more selected from titanium oxide, zinc oxide, and cerium oxide.