JP2003277229A - Two-layer-type cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a two-layer-type cosmetic which has a favorable touch and exerts an excellent re-dispersibility at use. <P>SOLUTION: The two-layer-type cosmetic contains (a) 0.01-3 mass% water- swellable clay mineral, (b) 0.01-20 mass% powder, (c) 0.001-5 mass% electrolyte and (d) water. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a two-layer cosmetic, and more specifically, a water-swellable clay mineral, a powder, an electrolyte,
The present invention relates to a two-layer type cosmetic which contains water and is separated into two layers when standing, and has good redispersibility and feel when used. In addition, the T zone (the amount of sebum secreted on the forehead of the face, nose muscles, chin,
The present invention relates to a two-layer type cosmetic for sticky parts).

[0002]

2. Description of the Related Art Conventionally, there are two-layer type cosmetics such as liquid / liquid and liquid / solid, which are lightly shaken at the time of use and used as one layer. There was no restriction on the active ingredients and it was applied to various cosmetics.

The liquid / liquid type two-layer type cosmetic composition has an oil layer on one side and a water layer on the other side, and is used by being re-emulsified by light shaking during use. liquid/
In the case of the liquid type two-layer type, both are transparent layers,
The appearance is beautiful when the two layers are allowed to stand, such as adding color to one layer to add color to one layer and making one layer an emulsion layer.
It was an important factor in increasing added value as a product.

A liquid / solid type, specifically, a two-layer type cosmetic in which a powder is contained in a liquid layer is watery when used and has a dry feel after use. A large number of products have been put on the market, and a typical example is a sunscreen containing a liquid layer containing an ultraviolet-preventing powder such as particulate titanium oxide.
Further, there is also a cosmetic containing a powder having an astringent effect, which is called a calamine lotion.

This liquid / solid type two-layer type cosmetic is a baking product in which the powder contained therein solidifies at the bottom surface in the liquid layer after standing still for a long time and does not disperse even when shaken. There is a phenomenon called "." As a study to prevent it, an invention containing a powder and a specific water-insoluble component (Japanese Patent Laid-Open No. 62-2773).
10), an invention containing a hydrophobic powder and a volatile oil component and / or an ester oil (JP-A-7-267843), and the like. However, none of the liquid / solid type two-layer type cosmetics does not cause caking and sufficiently satisfies the redispersibility.

[0006]

SUMMARY OF THE INVENTION The present invention has been made under the circumstances as described above, and it is separated into two layers, a water layer and a powder layer, when standing, and has good redispersibility and feel during use. To provide a two-layer type cosmetic composition.

[0007]

As a result of intensive studies to solve the above problems, the present inventor found that a composition containing water-swelling clay minerals, powders, electrolytes, and aqueous components in specific amounts was allowed to stand still. Sometimes it separates into two layers, a water layer and a powder layer, it has a refreshing feeling when used by shaking, it has a dry feeling after use, and it does not cause caking even after standing for a long time, so it feels good. Further, they have found that the composition is a two-layer type cosmetic composition having excellent redispersibility, and have completed the present invention.

That is, the present invention provides the following components (a)-
(D), (a) Water-swellable clay mineral 0.01-3% by mass (b) Powder 0.01-20% by mass (c) Electrolyte 0.001-5% by mass (d) Containing water The present invention relates to a two-layer type cosmetic composition characterized by: Further, the content mass ratio of the component (a) and the component (b) is 1: 1000 to 100: 1, and the content mass ratio of the component (a) and the component (c) is 1: 100 to 10: 1. The present invention relates to a two-layer type cosmetic composition characterized in that Further, the present invention relates to a two-layer type cosmetic composition which is substantially free of oil and whose component (b) is fumed silica. Further, the present invention relates to a two-layer type cosmetic composition which is a T-zone cosmetic composition.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The structure of the present invention will be described below. The component (a) water-swellable clay mineral used in the present invention is contained in the powder layer, and is intended for the purpose of imparting to the skin a function of softly agglomerating the powder and a tactile, dry feel. It is contained.

Specific examples of the component (a) used in the present invention include montmorillonite, beidellite, nontronite, saponite, hectorite, stevensite, and vermiculite, which have good redispersibility. From the viewpoint of being obtained, montmorillonite can be preferable. These components (a) can be used either individually or in combination of two or more as required.

The content of the component (a) used in the present invention is 0.01 to 3% by mass (hereinafter, simply referred to as "%"), and more preferably 0.05 to 1%. 0.01
If it is less than%, the redispersibility is inferior, and if it exceeds 3%, the feeling of use may be poor, and it may take time to cleanly separate into two layers or it may not separate into two layers. Not preferable.

The component (b) powder used in the present invention is contained in the powder layer, and is contained for the purpose of producing various feels.

To specifically exemplify the component (b) used in the present invention, titanium oxide, konjac, ultramarine blue,
Red iron oxide, yellow iron oxide, black iron oxide, zinc oxide, aluminum oxide, silica, fumed silica, magnesium oxide, zirconium oxide, magnesium carbonate, calcium carbonate,
Chromium oxide, chromium hydroxide, carbon black, aluminum silicate, magnesium silicate, magnesium aluminum silicate, mica, synthetic mica, synthetic sericite, sericite, talc, kaolin, silicon carbide, barium sulfate, inorganic such as boron nitride Powders, bismuth oxychloride, titanium mica, iron oxide-coated mica, iron oxide mica titanium, organic pigment treated mica titanium, bright powders such as aluminum powder, nylon powder, polymethylmethacrylate, acrylonitrile-methacrylic acid copolymerization Combined powder, vinylidene chloride-methacrylic acid copolymer powder, polystyrene, polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, polytetrafluoroethyl Down powder, wool powder,
Silk powder, crystalline cellulose, magnesium stearate, zinc stearate, organic powders such as N-acyl lysine, pigment powders such as organic tar pigments, lake pigments of organic pigments, titanium oxide coated with fine particles titanium oxide, fine particles oxidized Examples thereof include composite powders of zinc-coated mica titanium, barium sulfate-coated titanium mica, titanium oxide-containing silicon dioxide, zinc oxide-containing silicon dioxide, and the like. From the viewpoint of improving redispersibility and feeling of use, silica, fumes Preferred are silica, mica, sericite, talc, kaolin, boron nitride, nylon powder, and silk powder. Among these, fumed silica is more preferable from the viewpoints that good redispersibility is obtained and a dry feeling after use is also obtained. These components (b) can be used alone or in combination of two or more as required.

Component (b) in the two-layer cosmetic of the present invention
Content of 0.01 to 20%, more preferably 0.1 to 20%
It is 10%. If it is less than 0.01%, a dry feeling after use cannot be obtained, and if it exceeds 20%, the feel during use becomes unfavorable.

The component (c) electrolyte used in the present invention is
Water-swelling clay minerals and powders should be soft-agglomerated and kept stable for a long period of time without caking. Similarly, soft agglomeration should promote the separation of powders until the next use (usually the next day). It is also contained for the purpose of separating into two clean layers.

To specifically exemplify the component (c) used in the present invention, sodium chloride, potassium chloride,
Sodium monohydrogen phosphate, magnesium chloride, calcium chloride, aluminum chloride, sodium lactate, sodium citrate, sodium malate, sodium succinate, sodium pyrrolidonecarboxylate, calcium lactate, sodium ascorbate phosphate, magnesium ascorbate phosphate etc. Is preferred, and magnesium chloride, calcium chloride, calcium lactate, and magnesium ascorbate phosphate can be preferably used from the viewpoint of obtaining a product having good redispersibility. These components (c) can be used alone or in combination of two or more, if necessary.

The content of the component (c) used in the present invention is 0.001 to 5%, more preferably 0.01 to 1%.
Is. If it is less than 0.001%, caking occurs and redispersibility deteriorates, and if it exceeds 5%, soft coagulation proceeds to cause strong coagulation and redispersibility deteriorates, and stickiness after use is unpreferable.

The present invention provides a two-layer type cosmetic composition by combining the above-mentioned component (a) water-swellable clay mineral and component (b) powder, component (c) electrolyte and component (d) water. It is possible. That is, by soft agglomerating the water-swellable clay mineral and the powder with the electrolyte, it is possible to realize good redispersibility without causing caking. In particular, the content mass ratio of the component (a) and the component (b) is 1:10.
00-100: 1, preferably 1: 100-10: 1, and the content mass ratio of component (a) and component (c) is 1: 100-10: 1, preferably 1: 10-5. When it is in the range of 1, the two-layer type cosmetic composition does not cause caking and has good redispersibility.

In addition, the two-layer cosmetic of the present invention can be stably blended with a powder having a high oil absorption amount, and since it gives a dry feeling after use, it substantially contains no oil. If it is manufactured without using it, it can be suitably used as a cosmetic for the T-zone, which has a large amount of sebum secretion and is sticky.

In addition to the above-mentioned essential components, the two-layer cosmetic of the present invention further contains components used in ordinary cosmetics such as surfactants, oils, polyhydric alcohols, lower alcohols, ultraviolet absorbers and antioxidants. , A bactericide, an antiseptic, a fragrance, a coloring agent, a beauty agent and the like can be used as long as the effects of the present invention are not impaired.

The two-layer type cosmetic of the present invention is produced by a method for producing a usual cosmetic, and the water-swelling clay mineral, powder and electrolyte which are the essential components of the present invention are added to the aqueous layer. No particular limitation is imposed on the manufacturing equipment and the like.

The two-layer cosmetic of the present invention is a lotion, a beauty essence, a sunscreen, a massage, a body lotion,
It can be applied to make-up bases and the like.

[0023]

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

Examples 1-10 and Comparative Examples 1-6: Lotions Lotions were prepared according to the compositions shown in Table 1 (Examples) and Table 2 (Comparative Examples) and the production method shown below. The obtained lotion was evaluated for appearance, stability over time (redispersibility) and sensory (feeling of use). The results are also shown in Tables 1 and 2.

[0025]

[Table 1]

[0026]

[Table 2]

<Manufacturing method> A. Swell component 1 with part of component 9. B. Components 5 to 8 are mixed and dissolved. C. Add B to the rest of ingredient 9 and mix. D. Add A and ingredients 2 to 4 to C and mix. E. Ingredients 10 and 11 are added to D and mixed.

<Evaluation of Appearance> The appearance of each lotion shown in Table 1 and Table 2 when left still at room temperature for 1 day was evaluated according to the following criteria.

[0029]   (Judgment criteria) (Judgment)       The water layer was transparent and separated into two beautiful layers: ◎       Water layer is slightly cloudy, but water layer-powder         The separation interface separated into two clean layers: ○       Separates into two layers, but the water layer-powder layer separation interface         Ambiguous: △       Water layer is turbid and separation is unclear / does not separate: ×

<Evaluation of stability over time> Each lotion shown in Tables 1 and 2 was left at 5 ° C. and 40 ° C. for 1 month and shaken lightly, and the redispersibility at that time was evaluated according to the following criteria. The judgment was made according to

[0031]   (Judgment criteria) (Judgment)       Redispersed after 5 times: ◎       Redispersed after 6 to 10 times: ○       Redispersed 11 to 20 times: △       Redispersed 21 times or more / no redispersion: ×

<Sensory Evaluation> For each lotion shown in Tables 1 and 2, 10 female specialist panels evaluated the following items and judged according to the following criteria.

(Evaluation items) -Whether it feels refreshed during use (+) or not (-)-Does it feel dry after use (+) or not (-)

(Judgment criteria) More than 8 people gave (+): ◎ 5 to 7 people gave (+): ○ 3 to 4 people gave (+): △ 2 people or less made (+): ×

As is clear from the results shown in Tables 1 and 2, the lotions of Examples 1 to 10 of the present invention are the same as Comparative Examples 1 to 10.
Compared to lotion No. 6, it has a clean two-layer state, has good redispersibility, and has a good feeling of use (a refreshing feel and a dry feel).
Was excellent.

[0036] Example 11 Lotion (%)   1. Montmorillonite 0.5   2. Silica 2.0   3. Dipropylene glycol 3.0   4. Ethanol 15.0   5. Menthol 0.3   6. Purified water Remaining amount   7. Sodium citrate 0.3   8. Beauty agent

<Manufacturing method> A. Swell component 1 with part of component 6. B. Mix the rest of components 2-5 and 6. C. Add A and ingredients 7 and 8 to B and mix.

The lotion of Example 11 had a two-layer appearance in which the upper layer was a water layer and the lower layer was a powder layer, had good redispersibility, and had a good feeling of use (a refreshing feeling, a feeling of dryness) and was excellent. It was a thing.

[0039] Example 12 Whitening lotion (%)   1. Hectorite 1.5   2. Nylon powder 5.0   3. Silica 5.0   4. Polyoxyethylene (60) hydrogenated castor oil 1.5   5. Jojoba oil 0.5   6. Squalane 0.5   7.1,3-butylene glycol 15.0   8. Purified water Remaining amount   9. Glycerin 5.0 10. Sodium ascorbyl phosphate 5.0 11. Beauty agent 12. Fragrance suitable amount

<Manufacturing method> A. Swell component 1 with part of component 8. B. Components 4 to 7 are mixed and dissolved. C. B is added to the rest of the component 8 and emulsified. D. Add A and ingredients 2, 3 to C and mix. E. Ingredients 9-12 are added to D and mixed.

In the whitening lotion of Example 12, the upper layer is an aqueous layer,
The outer appearance of the two-layered powder layer was a powder layer, the redispersibility was good, and the feeling of use (freshness and dryness) was excellent.

[0042] Example 13 Suncut (registered trademark) (sunscreen) (%)   1. Hectorite 0.5   2. Stephen Sight 0.5   3. Fine particle titanium oxide 5.0   4. Zinc oxide 5.0   5. Nylon powder 3.0   6. Glycerin 5.0   7. Ethanol 10.0   8. Propylene glycol 10.0   9. Purified water Remaining amount 10. Potassium chloride 1.0 11. Beauty agent 12. Fragrance suitable amount

<Manufacturing method> A. Swell components 1 and 2 with part of component 9. B. Mix the rest of ingredients 3-8 and 9. C. Add A and ingredients 10-12 to B and mix.

The sun cut (registered trademark) (sunscreen) of Example 13 had a two-layer appearance in which the upper layer was a water layer and the lower layer was a powder layer, and the redispersibility was good, and a good feeling of use (refreshing) was obtained. It was excellent.

[0045]

EFFECTS OF THE INVENTION The present invention provides a two-layer type cosmetic composition by containing water-swelling clay mineral, powder, electrolyte and water.
It is possible to obtain a two-layer type cosmetic composition which has a good feel during use (a refreshing feeling and a dry feeling) and good redispersibility after standing for a long period of time.

Claims (5)

[Claims] 1. The following components (a) to (d): (A) Water-swellable clay mineral 0.01-3% by mass (B) Powder 0.01 to 20% by mass (C) Electrolyte 0.001 to 5 mass% (D) water A two-layer type cosmetic comprising: 2. The content mass ratio of the component (a) and the component (b) is 1: 1000 to 100: 1, and the content mass ratio of the component (a) and the component (c) is 1: 100 to 10. The two-layer cosmetic according to claim 1, wherein the two-layer cosmetic is 1. 3. The two-layer cosmetic composition according to claim 1, which is substantially free of oil. 4. The two-layer cosmetic composition according to claim 1, wherein the component (b) is fumed silica. 5. The two-layer type cosmetic composition according to claim 1, which is a T-zone cosmetic composition.