JP2001247430A - Aqueous solid cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an aqueous solid cosmetic having a spread in application, excellent uniformity of cosmetic film after application and excellent shape retention. SOLUTION: This aqueous solid cosmetic comprises a component (a) of an agar, a component (b) of boron nitride powder and a component (c). The aqueous solid cosmetic has a mass ratio (b)/(c) of the component (a) and the component (b) of 0.05-35. The aqueous solid cosmetic has 0.1-30 μm average particle diameter of the component (b).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous solid cosmetic, and more particularly, to an aqueous solid cosmetic having good spreadability, excellent uniformity of a cosmetic film, and good shape retention.

[0002]

2. Description of the Related Art Aqueous solid cosmetics have been applied to cosmetics such as foundations because they have a fresh feeling of use and are excellent in portability.
However, in conventional water-based solid cosmetics, it is necessary to incorporate a water-soluble polymer such as agar in order to maintain a solid form, and thus, the elongation and spread may be deteriorated. For this reason,
This problem has been solved by adjusting the amount of oils, glycols, and surfactants to be blended, or by blending a large amount of plate-like powders such as spherical powders and mica with good spreadability.

[0003]

However, in the case where the spread is adjusted by using an oil, a glycol, or a surfactant to be blended, the spread is improved to some extent, but as the time elapses, the oil or the like emerges on the surface of the decorative film. In some cases, shrinkage may occur or shape retention may be poor.
In addition, when a large amount of spherical powder is added to adjust the spread, the spread is improved to some extent, but the uniformity of the decorative film tends to be impaired. Further, when a plate-like powder having a high hydrophilicity such as mica is used, the dispersibility in the aqueous solid cosmetic is good, but the elongation and spread may be heavy. Furthermore, when a plate-like powder having high lipophilicity such as magnesium stearate is used, the dispersion in the aqueous solid cosmetic is poor, and the spread may be poor. Therefore,
There has been a long-awaited desire to develop a water-based solid cosmetic composition that is stretchable, has excellent uniformity of a cosmetic film, and has good shape retention.

[0004]

Under such circumstances, the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have added boron nitride powder to an aqueous solid cosmetic containing agar and water. The present inventors have found that a water-based solid cosmetic which can be expanded and spread, has excellent uniformity of the decorative film, and has good shape retention can be obtained, and has completed the present invention.

That is, the present invention provides the following components (a) to
(C); (a) agar, (b) boron nitride powder, and (c) water. The water-based solid cosmetic wherein the content ratio of the component (a) to the component (b) is (b) / (a) = 0.05 to 35 by mass ratio, and further, the average particle size of the component (b). The water-based solid cosmetic according to any one of the above, having a diameter of 0.1 to 30 μm.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
Component (a) used in the present invention is a component for molding water into a solid in the aqueous solid cosmetic of the present invention,
Usually, known agar is used. In addition, this agar is so-called low-strength agar (disclosed in Japanese Patent Application Laid-Open No. 5-317008) in which molecules are cut by applying an acid treatment or the like to adjust the jelly strength. Is more preferable because it is better.

[0007] The content of the component (a) in the aqueous solid cosmetic composition of the present invention is preferably 0.01 to 10% by mass (hereinafter simply abbreviated as "%"), and more preferably 0.2 to 7%. preferable. When used in this range, the hardness of the aqueous solid cosmetic is maintained at an appropriate level, and the spread and the uniformity of the decorative film are further improved.

The component (b) used in the present invention improves the spread of the aqueous solid cosmetic composition of the present invention, and generally known boron nitride powder is used. The boron nitride powder has various crystal structures depending on the production method, but a hexagonal structure having more lubricity is preferable. Also,
The average particle size of the component (b) is preferably from 0.1 to 30 μm,
Particularly preferred is 1 to 15 μm. When boron nitride powder within this range is used, the spread and transparency, and the uniformity of the decorative film are better. Such a component (b) is commercially available as SHP series (manufactured by Mizushima Alloy Iron),
Treceram T-BN-LB (manufactured by Toray Industries, Inc.) and the like.

[0009] The content of the component (b) in the aqueous solid cosmetic of the present invention is preferably 0.1 to 10%, more preferably 0.3 to 10%.
~ 5% is particularly preferred. When used in this range, the elongation and spread become better.

In the aqueous solid cosmetic of the present invention, the content ratio of the component (a) to the component (b) is expressed by mass ratio of (b) /
(A) = The range of 0.05-35 is preferable, and 0.2-1.
0 is particularly preferred. When used in this range, elongation and spread are particularly good and shape retention is also excellent.

As the component (c) used in the present invention, water is used as a medium for dissolving and dispersing the component (a).
In the aqueous solid cosmetic of the present invention, the content is 30 to 80%.
Is preferred. When it is used in this range, a watery solid cosmetic can be satisfactorily provided with a crisp use feeling.

The aqueous solid cosmetic of the present invention contains, in addition to the above-mentioned components, a quantitative amount which does not impair the effects of the present invention depending on the purpose.
In a qualitative range, powders other than the component (b), oils, surfactants, water-soluble polymers other than the component (a), pH adjusters, aqueous components, ultraviolet absorbers, acrylic-modified silicone, trimethylsiloxysilicic acid And the like, an oil-soluble film-forming agent such as ethanol, a solvent such as ethanol, a preservative such as a paraoxybenzoic acid derivative and phenoxyethanol, a vitamin, a cosmetic ingredient, a humectant, a fragrance, a bactericide, and an antioxidant.

The powder used in the water-based solid cosmetic of the present invention is used for the purpose of a coloring agent, a feel control agent, an ultraviolet absorber and the like. It is not particularly limited, and is not particularly limited by a shape such as a spherical shape, a plate shape, and a needle shape, a fume shape, a fine particle, a particle size such as a pigment grade, and a particle structure such as porous and nonporous. Brilliant powders, organic powders, pigment powders, composite powders, and the like. Specifically, titanium oxide, talc, mica, kaolin, sericite, magnesium carbonate, calcium carbonate, aluminum silicate, magnesium silicate,
Composite powder composed of calcium silicate, zinc oxide, red iron oxide, yellow iron oxide, black iron oxide, ultramarine, konjo, tar pigment, natural pigment, mica titanium, iron oxide mica titanium, nylon powder, and different organopolysiloxanes (Japanese Patent Application Flat 11-1
And the like, and one or more of these can be used. In addition, these powders are treated with silicone compounds such as dimethylpolysiloxane, methylhydrogenpolysiloxane, and trimethylmethoxysilicic acid, and fluorine compounds such as perfluoropolyether phosphoric acid, perfluoroalkyl phosphoric acid, and fluorine-modified silicone. , A metal soap such as zinc laurate, an amino acid such as N-long-chain acylamino acid, an oil treatment of higher fatty acids, higher alcohols, esters, waxes and the like. May be used. The content when using the powder in the aqueous solid cosmetic of the present invention is affected by the purpose of blending and the type of powder,
Generally, 1 to 40% is preferable.

The oil agent used in the aqueous solid cosmetic of the present invention is used, for example, for giving an emollient feeling to the skin or for reducing the powderiness when powder is blended. Specifically, it is not particularly limited as long as it is an oil agent usually used in cosmetics, regardless of the origin of animal oil, vegetable oil, synthetic oil and the like, and solid oil, semi-solid oil, liquid oil, and properties of volatile oil and the like. , Hydrocarbons, fats, waxes, hardened oils,
Oil agents such as ester oils, fatty acids, silicone oils, fluorinated oils, and lanolin derivatives are exemplified. Specifically, hydrocarbons such as liquid paraffin, squalane, petrolatum, paraffin wax, ceresin wax, microcrystalline wax, mokurou, montan wax, fishatrops wax, olive oil, castor oil, jojoba oil, mink oil, macadamian Fats and oils such as nut oil, beeswax, lanolin, carnauba wax, candelilla wax, waxes such as gay wax, cetyl isooctanoate, isopropyl myristate, isopropyl palmitate, octyl dodecyl myristate, glyceryl trioctanoate, glyceryl tribehenate , Rosin acid pentaerythritol ester, esters such as neopentyl glycol dioctanoate, stearic acid, lauric acid, myristic acid, behenic acid, isostearic acid,
Fatty acids such as oleic acid, rosin acid, 12-hydroxystearic acid, low polymerization degree dimethylpolysiloxane, high polymerization degree dimethylpolysiloxane, methylphenylpolysiloxane, decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, fluorine-modified silicone Such as silicones, perfluoropolyethers, perfluorodecane, fluorinated oils such as perfluorooctane, lanolin, lanolin acetate, lanolin fatty acid isopropyl, lanolin derivatives such as lanolin alcohol, and the like. Two or more types can be used. The content of the oil agent when the oil agent is mixed with the aqueous solid cosmetic of the present invention is preferably about 0.5 to 40%.

The method for preparing the aqueous solid cosmetic of the present invention is not particularly limited. For example, the component (b) is dispersed in an aqueous system in which the component (a) is dissolved or dispersed in the component (c).
If necessary, a method of dispersing and emulsifying other powders and oils and the like, filling the container and molding into a solid, etc. may be mentioned.

The aqueous solid cosmetic of the present invention includes foundation, eye shadow, blusher, lipstick, eyeliner, sunscreen, foundation cream, milky lotion, and serum, among which the effects of the present invention are exhibited. It is easy to make makeup cosmetics.

[0017]

The present invention will be described in more detail with reference to the following examples. These do not limit the present invention at all. Examples 1 to 4 and Comparative Examples 1 to 4: Aqueous solid foundation Aqueous solid foundation was prepared by the composition shown in Table 1 and the following production method, and “good spreadability”, “uniformity of decorative film” and “ Each item of "shape retention" was evaluated by the following evaluation methods and criteria, and the results are shown in Table 1.

[0018]

[Table 1]

* Note 1: Asahigard AG-530 powder
(Manufactured by Asahi Glass Co., Ltd.) for 5% in terms of solid content. * Note 2: SHP-6 (trade name, manufactured by Mizushima Alloy Irons Co., Ltd .: Average particle size: 8 to 12 μm)

(Production method) A. Heat and dissolve components 17-22. B. Components 1 to 15 are mixed by heating, added to A, and mixed and dispersed. C. After mixing component 16 with B, the mixture is filled into a container. D. C was solidified by cooling to obtain an aqueous solid foundation. In addition, in filling each aqueous solid cosmetic, in order to impart ease of use at the time of use of the solid cosmetic after molding, a molding method in which a water-containing sheet-like material is attached to the surface of the cosmetic and solidified and then peeled off. Adopted.

(Sensory Evaluation Method and Judgment Criteria)
4 and 20 aqueous solid foundations of Comparative Examples 1 to 3 were used by 20 professional panelists for cosmetics for 2 weeks, and the sensory evaluations such as good spread and spread at the time of application and uniformity of the cosmetic film after the application were performed. Regarding the solid foundation, a rating was given in the following five grades, and the average score of the scores of all panels was calculated and determined according to the following criteria.

(Evaluation Method and Judgment Criteria for Shape Retention) The state of the surface of the aqueous solid foundation after the above-mentioned panel was used for about 2 weeks was observed, and judgment was made according to the following judgment criteria.

As is clear from the results in Table 1, Example 1
The aqueous solid foundations Nos. 1 to 4 were water-based solid foundations which spread and spread upon application, have excellent uniformity of the decorative film after application, and have good shape retention. on the other hand,
The water-based solid foundation of Comparative Example did not satisfy any of the items.

Example 5: Water-based solid eye shadow (component) (% by mass) Titanium mica 5 2. Talc 6 3. Synthetic phlogopite 3 4. Red No. 202 15 Yellow No. 4 aluminum lake 0.56. Titanium oxide 17 7. Polystyrene powder 2 8 Silicic anhydride 5 9. Boron nitride powder (Note 3) 1 10 Soy phospholipid 0.5 11. 11. Sucrose fatty acid ester 0.3 12. Sorbitan sesquioleate 0.2 Appropriate amount of fragrance 14. Preservative appropriate amount 15.1,3-butylene glycol 15 16. Glycerin 3 17. Carrageenan 0.03 18. Agar 1.2 19. Remaining purified water * Note 3: Trade name TRESERAM T-BN-LB (Toray: average particle size 5-7 μm)

(Production method) A. Heat and dissolve ingredients 14-18. B. Components 1 to 12 are mixed by heating, added to A, and mixed and dispersed. C. After mixing component 13 with B, the mixture is charged into a container. D. C was solidified by cooling to obtain an aqueous solid eyeshadow. The same molding method as in Examples 1 to 4 was employed for molding. The aqueous solid eyeshadow of Example 5 was a water-based solid eyeshadow that spreads and spreads at the time of application, has excellent uniformity of the decorative film after application, and has good shape retention.

[0026]

As described in detail above, the water-based solid cosmetic of the present invention is an aqueous solid cosmetic which has good spreadability upon application, excellent uniformity of the cosmetic film after application, and good shape retention. there were.

Claims (3)

[Claims] 1. A water-based solid cosmetic comprising: (a) agar, (b) boron nitride powder, and (c) water. 2. The aqueous solid according to claim 1, wherein the content ratio of the component (a) to the component (b) is (b) / (a) = 0.05 to 35 by mass ratio. Cosmetics. 3. The component (b) has an average particle size of 0.1 to 30 μm.
The aqueous solid cosmetic according to claim 1 or 2, wherein m is m.