JP2001213720A - Double layer type cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double layer type cosmetic, which contains a phosphatide and a water-soluble macromolecule, having good sense of use and redispersibility. SOLUTION: The cosmetic which is separated into a cloudy layer and a transparent aqueous layer and contains the phosphatide of 0.01-10 mass%, water- soluble macromolecule of 0.001-1 mass% and water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-layer cosmetic, and more particularly, it contains a specific amount of a phospholipid and a water-soluble polymer, separates into two layers upon standing, and redisperses when used. The present invention relates to a two-layer cosmetic having good properties and feel.

[0002]

2. Description of the Related Art Conventionally, two-layer cosmetics include two-layer cosmetics such as liquid / liquid and liquid / solid, which are lightly shaken when used and used as a single layer. There were no restrictions on the target components, and the composition was applied to various cosmetics.

[0003] In the two-layer type cosmetics, the liquid / solid type, specifically, the type in which the powder is contained in the liquid layer, is fresh when used and has a dry feel after use. The product has an excellent feel, and many products have been put on the market. Typical examples include a sunscreen that contains a liquid layer containing an anti-UV effect such as fine particle titanium oxide. . There have also been cosmetics containing a powder having an astringent effect called calamine lotion. Liquid / solid type cosmetics have a phenomenon called cake which, after standing for a long period of time, causes the contained powder to solidify at the bottom of the liquid layer and does not disperse even when shaken. In order to prevent the occurrence of such a problem, JP-A-62-277310 containing a powder and a specific water-insoluble component, and JP-A-7-26784 containing a hydrophobic powder and a volatile oil and / or an ester oil are disclosed.
There was a proposal such as Japanese Patent Publication No.

[0004] A liquid / liquid type two-layer cosmetic has one oil layer and the other water layer, and is lightly shaded when used.
It is re-emulsified by king and used.
In the case of the liquid / liquid type two-layer type, the appearance of the two-layer type, such as making the two layers transparent, adding a colorant to one of the layers to add color, etc. It was an important factor in increasing added value. However, in the liquid / liquid type two-layer cosmetics, almost no studies have been made on cosmetics in which one layer is a cloudy layer and the other is a transparent aqueous layer.

[0005]

It is an object of the present invention to provide a two-layer cosmetic which separates into two layers, that is, a white turbid layer and a transparent aqueous layer when left at rest, and has good redispersibility and feel when used. Make it an issue.

[0006]

In view of such circumstances, the present inventor has conducted intensive studies to solve the above-mentioned problems. As a result, the present inventor contained a specific amount of a phospholipid and a water-soluble polymer, The two-layer cosmetic that separates into two layers, a water layer and a water layer, has a refreshing feeling when shaking and used, a moist feeling after use, and a good redispersibility after standing for a long time. The present invention was found to be possible, and the present invention was completed.

That is, the present invention comprises (a) 0.01 to 10% by mass of a phospholipid, (b) 0.001 to 1% by mass of a water-soluble polymer, and (c) water, and is separated into a cloudy layer and a transparent aqueous layer. The present invention relates to a two-layer cosmetic which is characterized in that:

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below. The phospholipid used in the present invention is contained in the cloudy layer and is blended for the purpose of imparting a moist feeling to the skin. Further, when an oil agent is contained, it also functions as an emulsifier.

Specific examples of the phospholipid used in the present invention include soybean-derived phospholipid, soybean-derived hydrogenated phospholipid, soybean-derived lysophospholipid, soybean-derived hydrogenated lysophospholipid, egg yolk-derived phospholipid, and egg yolk. Derived hydrogenated phospholipids, egg yolk-derived lysophospholipids, egg yolk-derived hydrogenated lysophospholipids are exemplified, among which, from the viewpoint that it is easy to obtain a cloudy layer with good redispersibility, soybean-derived hydrogenated phospholipids, Egg yolk-derived hydrogenated phospholipids can be mentioned as preferred. One or two or more of these phospholipids can be used as necessary.

The amount of the phospholipid used in the present invention is as follows:
The content is 0.01 to 10% by mass (hereinafter, mass% is referred to as%), more preferably 0.1 to 5%. If it is less than 0.01%, a moist feeling after use cannot be obtained, and if it exceeds 10%, stickiness is strongly felt, which is not preferable.

The water-soluble polymer used in the present invention is compounded for the purpose of softly coagulating the particles of the cloudy layer and keeping the particles stable for a long period of time.

Specific examples of the water-soluble polymer used in the present invention include guar gum, sodium chondroitin sulfate, hyaluronic acid, gum arabic, xanthan gum, locust bean gum, sodium alginate, carrageenan, quince seed, agar, Natural things such as pectin, methylcellulose, hydroxyethylcellulose, sodium carboxymethylcellulose,
Semi-synthetic ones such as hydroxyethyl cellulose propyl ammonium chloride, carboxyvinyl polymer,
Synthetic ones such as alkyl-added carboxyvinyl polymer, polyvinyl alcohol, polyvinylpyrrolidone, and sodium polyacrylate can be mentioned. Among them, from the viewpoint of easily obtaining soft aggregation of particles, anionic xanthan gum, sodium alginate, and carrageenan can be mentioned as preferable ones. One or two or more of these water-soluble polymers can be used as necessary.

The content of the water-soluble polymer in the two-layer cosmetic of the present invention is 0.001-1%, more preferably 0.01%.
1 to 0.5%. If it is less than 0.001%, the particles cannot be softly agglomerated, and if it exceeds 1%,
In some cases, the system becomes viscous and does not become a two-layer type.

The present invention makes it possible to obtain a two-layer cosmetic by combining the above specific amount of phospholipid with a water-soluble polymer. That is, by softly aggregating the phospholipids formed into particles via the water-soluble polymer, the area where the interfaces of the particles are in contact with each other is reduced, and coalescence hardly occurs. Therefore, it is possible to realize good redispersibility even after being left for a long time (one year or more). As a result, it has conflicting sensory characteristics of a refreshing feeling and a moist feeling,
This enabled the realization of cosmetics with distinctive appearance. That is, a good feeling of use after intentionally forming a two-layer type and shaking is a feeling of use that is not found in a single-layer, stable cosmetic.

In the present invention, an oil agent can be added for the purpose of further improving the moist feeling and the refreshing feeling.

Specific examples of the oil agent used in the present invention include avocado oil, linseed oil, almond oil,
Olive oil, kyounin oil, whale wax, hydrogenated oil, wheat germ oil, sesame oil, rice germ oil, rice bran oil, safflower oil,
Shea butter, soybean oil, corn oil, castor oil, hardened castor oil, jojoba oil, macadamia nut oil, beeswax,
Mink oil, cottonseed oil, coconut oil, hydrogenated coconut oil, lanolin; hydrocarbon oils such as squalane, squalene, liquid paraffin, pristane, polyisobutylene, and serine; higher fatty acids such as stearic acid, behenic acid, undecylenic acid, and oleic acid , Linoleic acid, linolenic acid, isostearic acid, 12-hydroxystearic acid, etc .;
Cholesterol, phytosterol, and the like as ester; ester oils as isosetyl isostearate, trimethylolpropane triisostearate, ethylene glycol di-2-ethylhexanoate, cetyl 2-ethylhexanoate, and trimethylol tri-2-ethylhexanoate. Propane, pentaerythritol tetra-2-ethylhexanoate, cetyl octoate, oleyl oleate, octyldodecyl oleate, neopentyl glycol dicaprate, 2-ethylhexyl succinate, isocetyl stearate, butyl stearate, di-2 sebacate
-Ethylhexyl, cetyl lactate, myristyl lactate, cholesteryl hydroxystearate, dipentaerythritol fatty acid ester, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, diisostearyl malate, etc .; glyceride oil is glyceride triisostearate Glyceride tri-2-ethylhexanoate, glyceryl monostearate, glyceride di-2-heptylundecanoate, etc .; silicone oils such as dimethylpolysiloxane, methylphenylpolysiloxane and the like; Examples thereof include cyclic ones such as siloxane and decamethylcyclopentasiloxane. Among them, vegetable oils such as avocado oil, olive oil, wheat germ oil, sesame oil, jojoba oil, macadamia nut oil, sterols such as cholesterol, phytosterol, cholesteryl hydroxystearate, etc. from the viewpoint that it is easy to give a moist feeling. , Triglycerides such as glyceryl trioctanoate, from the viewpoint that it is easy to give a refreshing feeling, silicone oil such as dimethylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, etc. It can be exemplified as a preferable one. One or more of these oil agents can be used as needed.

The content of the oil agent in the two-layer cosmetic of the present invention is from 0.001 to 30%, more preferably from 0.1 to 30%.
01 to 15%.

In the present invention, a powder can be blended for the purpose of further improving redispersibility and feeling of use.

Specific examples of the powder used in the present invention include titanium oxide, red iron oxide, yellow iron oxide, black iron oxide, zinc oxide, aluminum oxide, silicon dioxide, magnesium oxide, calcium carbonate, and silicate. aluminum,
Inorganic powders such as magnesium silicate, magnesium aluminum silicate, mica, sericite, talc, kaolin, silicon carbide, barium sulfate, boron nitride, titanium mica, iron oxide mica titanium, organic pigment treated mica titanium, aluminum powder, Nylon powder, polyethylene powder, polystyrene powder, organopolysiloxane elastomer powder, polymethylsilsesquioxane powder, polytetrafluoroethylene powder, wool powder, silk powder, crystalline cellulose, magnesium stearate, zinc stearate, N-acyl lysine, etc. Can be mentioned. Among these, silicon dioxide, mica, talc, kaolin, and nylon powder can be exemplified as preferred from the viewpoint of improving redispersibility and easily obtaining a dry feeling after use. One or two or more of these powders can be used as needed. Further, the powder is taken into the cloudy layer at the time of standing two-layer separation. The cloudy layer in which the powder is taken is located at the upper or lower part in the aqueous layer due to the difference in specific gravity from the aqueous layer.

[0020] The content of the powder in the two-layer cosmetic of the present invention is not particularly limited, but is preferably 0.1%.
It is 1 to 20%, more preferably 1 to 10%.

The aqueous layer of the two-layer cosmetic of the present invention contains only a component that is soluble only in the aqueous layer when the two layers are left to stand, and the oil component is apparently solubilized and contained. It has not been done. Further, in addition to the above essential components, components further used in ordinary cosmetics, for example, surfactants, polyhydric alcohols, lower alcohols, ultraviolet absorbers, antioxidants, bactericides, preservatives, fragrances, coloring agents, Beauty ingredients and the like can be used as long as the effects of the present invention are not impaired.

The two-layer cosmetic of the present invention is produced by a usual method for producing cosmetics. A specific amount of a phospholipid which is an essential component of the present invention, and a water-soluble cosmetic are prepared in an aqueous layer. What is necessary is just to disperse | distribute a polymer, and the manufacturing equipment etc. are not restrict | limited.

The two-layer cosmetic of the present invention can be applied to lotions, serums, sunscreens, massages, makeup bases and the like.

[0024]

Next, 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 8 and Comparative Examples 1 to 5 Essences Essences were prepared according to the compositions shown in Tables 1 and 2 and the production method described below. The appearance, redispersibility, and sensory evaluation of the obtained serum were performed. Table 1 shows the results.
Shown in

[0026]

[Table 1]

[0027]

[Table 2]

<Manufacturing Method> A. Mix and dissolve components 1 to 7 uniformly (70 ° C.) Heat component 8 (70 ° C.) Add B to A and emulsify. D. Cool C. E. FIG. Add component 10 to component 9 and swell. F. Add E and components 11 and 12 to D and mix.

<Evaluation of Appearance> The appearance of each of the serums shown in Tables 1 and 2 was allowed to stand at room temperature for one day, and the appearance was evaluated and judged according to the following criteria.

[0030]

<Evaluation of Redispersibility> Each of the serums shown in Tables 1 and 2 was allowed to stand at 25 ° C. for 6 months, and the cosmetic was lightly shaken.
And the redispersibility at that time was determined according to the following criteria.

[0032]

<Sensory Evaluation> Examples 1 to 8 and Comparative Example 1
About 5 essences, the following items were evaluated by 10 female professional panels and judged according to the following criteria.

(Evaluation items)-Whether you feel refreshed during use (+) or not (-)-Whether you feel moist after use (+) or not (-)

(Judgment Criteria) Eight or more were rated as +: ◎ 5 to 7 were rated as positive: ○ 3 to 4 were rated as positive: Δ 2 or less were rated as positive: ×

As is clear from the results in Tables 1 and 2,
The essences of Examples 1 to 8 of the product of the present invention show clear two-layered state, good redispersibility, and good feeling of use (freshness, moist feeling) as compared with Comparative Examples 1 to 5 ).

Example 9 Toner Component (%) Hydrogenated egg yolk phospholipid 0.1 2. Glycerin 2.0 3.1 1,3-butylene glycol 1.0 4. Jojoba oil 0.35. 5. Dimethyl polysiloxane (6 mm2 / s) 0.5 Purified water 10.0 7. 7. Hydroxymethyl cellulose 0.02 Purified water balance 9. Ethanol 10.0 10. Hamamelis extract 0.5 11. Appropriate amount of fragrance

<Manufacturing Method> Components 1 to 5 are uniformly mixed and dissolved. (70 ° C) B. Heat component 6. (70 ° C) C.I. Add B to A and emulsify. D. Cool C. E. FIG. Add component 7 to component 8 and swell. F. Add E and components 9 to 11 to D and mix.

The lotion thus obtained has a clear two-layer state in which the upper layer is a cloudy layer and the lower layer is an aqueous layer, has good redispersibility, and has a good feeling of use (freshness and moistness). ).

Example 10 Whitening Essence Component (%) Hydrogenated soybean phospholipid 2.5 2. Glycerin 5.0 3.1, 3-butylene glycol 5.0 4. Squalane 1.5 5. Hydroxystearic acid 0.5 Cholesteryl 6. Purified water 15.0 7. Carrageenan 0.18. Purified water balance 9. Ethanol 5.0 10. Dipropylene glycol 5.0 11. Nylon powder 2.0 12. Silicon dioxide 2.0 13. 13. Ascorbate magnesium phosphate 3.0 Appropriate amount of fragrance

<Manufacturing Method> Components 1 to 5 are uniformly mixed and dissolved. (70 ° C) B. Heat component 6. (70 ° C) C.I. Add B to A and emulsify. D. Cool C. E. FIG. Add component 7 to component 8 and swell. F. Add E and components 9 to 14 to D and mix.

The whitening essence obtained as described above is
It exhibited a clear two-layer state in which the upper layer was an aqueous layer and the lower layer was a cloudy layer, and was excellent in redispersibility and good in use (freshness and moistness).

Example 11 Sunscreen ingredient (%) 1. Soybean-derived phospholipid 1.0 Glycerin 5.0 3.1 1,3-butylene glycol 5.0 4.0. 4. Dimethyl polysiloxane (6 mm2 / s) 2.5 Decamethylcyclopentasiloxane 2.5 6. Octyl paramethoxycinnamate 5.0 7. Purified water 20.0 8. Xanthan gum 0.19. Purified water balance 10. Ethanol 5.0 11. Fine particle titanium oxide 5.0 12. Aloe extract 1.0 13. Appropriate amount of fragrance

<Manufacturing Method> Components 1 to 6 are uniformly mixed and dissolved. (70 ° C) B. Heat component 7. (70 ° C) C.I. Add B to A and emulsify. D. Cool C. E. FIG. Add component 8 to component 9 and swell. F. Add E and components 10 to 13 to D and mix.

The sunscreen obtained as described above exhibits a clear two-layer state in which the upper layer is an aqueous layer and the lower layer is a cloudy layer, has good redispersibility, and has a good feeling of use (freshness, moistness). Feeling).

[0046]

According to the present invention, the two-layer cosmetic contains a specific amount of a phospholipid and a water-soluble polymer to provide a feeling (freshness, moistness) at the time of use and a long-term standing after standing. A two-layer cosmetic having good redispersibility can be obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) A61K 7/48 A61K 7/48

Claims (4)

[Claims] 1. The following components (a), (b) and (c): (a) 0.01 to 10% by mass of a phospholipid, (b) 0.001 to 1% by mass of a water-soluble polymer, and (c) water A two-layer cosmetic containing a turbid layer and a transparent aqueous layer. 2. The two-layer cosmetic according to claim 1, further comprising 0.001 to 30% by mass of the component (d) oil. 3. The two-layer cosmetic according to claim 1, wherein the water-soluble polymer of the component (b) is anionic. 4. The two-layer cosmetic according to claim 1, further comprising a component (e) powder.