JP2005281295A - Cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a cosmetic having a smooth feeling of use and good uniformity of a makeup film and excellent effects on making sulcus cutis inconspicuous. <P>SOLUTION: This cosmetic is obtained by formulating the following ingredients (a) and (b). (a) a spherical particle having 25-35 μm particle diameter and (b) an oil. The cosmetic is characterized in that the particle content of the ingredient (a) in the whole spherical powder formulated in the cosmetic is 20-100 vol.%. The cosmetic for masking the sulcus cutis is characterized in that the ingredients (a) and (b) are formulated and the particle content in the ingredient (a) in the whole spherical powder formulated in the cosmetic is 20-100 vol.%. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cosmetic comprising a spherical particle having a particle size of 25 to 35 μm and an oil agent, and relates to a cosmetic having a smooth use feeling and good uniformity of the cosmetic film, and having an effect of making the skin groove inconspicuous. It is.

  In recent years, skin pores and deep skin grooves have been recognized by women as unfavorable parts in appearance. For this reason, products such as special-purpose cosmetics that make skin pores inconspicuous and foundations that give the effect of making skin pores inconspicuous have gained popularity in the market.

  In such conventional cosmetics, most of the techniques for making the pores of the skin inconspicuous are blended with spherical silica or the like, and diffused and reflected light hitting the skin to blur the pores. However, among the spherical powders that diffuse and reflect light, depending on the size of the particles, not only can a sufficient effect be exhibited, but conversely, pores and skin grooves may be conspicuous.

  In cosmetics containing a large amount of oil, oil becomes a medium due to sebum secretion at the time of application or after makeup, and particles smaller than the pores and crevice width on the crust initially have pores and crevice. In some cases, the particles appear to be scattered on the skin, resulting in a non-uniform makeup film, which may make pores and skin grooves conspicuous. In particular, when a coloring pigment such as a metal oxide having a high refractive index is blended, this phenomenon is remarkable.

  Therefore, in order to prevent these particles from entering the pores, a technology that imparts physical and chemical adsorption action to the powder with a surface treatment with high affinity to the skin, and a medium in which the particles move after application In order to reduce the amount, techniques for blending a volatile oil in the oil have been studied. However, these techniques sometimes cause problems such as loss of a smooth feeling during application and deterioration of the dispersibility of particles in the oil.

  On the other hand, in a cosmetic compounded with a composite powder in which a spherical monodisperse polymethyl methacrylate powder having a particle diameter of 0.4 μm is adhered to the surface of a spherical nylon powder having a particle diameter of 5 μm, the composite powder is split at the time of application, A technique has also been proposed in which polymethylmethacrylate powder is selectively adsorbed on the skin mound and nylon powder is adsorbed on the pores, thereby making unevenness such as skin pores inconspicuous. (For example, refer nonpatent literature 1.)

  Furthermore, as another technique, a technique that makes the pores not noticeable by utilizing the optical characteristics of the partially crosslinked organopolysiloxane elastomer has been proposed. (For example, see Patent Document 1)

J. et al. Soc. Cosmet. Chem. Jpn, Review 35 (2) 99-106 (2001) JP 09-227332 A

  However, in the technique described in Non-Patent Document 1, since the fine polymethylmethacrylate powder is selectively adsorbed on the skin part, when the color pigment is blended in the other part, the color pigment is changed to the skin part. In some cases, it becomes difficult to adhere to the pores and collects in the pores, making the pores conspicuous. Further, the technique described in Non-Patent Document 1 does not make pores and skin grooves inconspicuous, but blurs skin defects by covering the entire skin with a translucent film. Moreover, in cosmetics containing a colored powder, the fine polymethylmethacrylate powder that should be in the dermis has fallen into the crevice due to the large nylon powder, and the cosmetic film may appear uneven. Furthermore, a technique for making the skin groove inconspicuous has not been studied much.

  Therefore, as a result of intensive studies to solve the above-mentioned problems, the present inventor selectively covered particles with a particle size of 25 to 35 μm with respect to the pore size of the skin and the width of the skin groove. The present invention was completed by finding out that the effect of filling the crevice was excellent. And it discovered that it was excellent in the effect which makes a skin groove inconspicuous by apply | coating this particle | grain to skin using oil agent as a medium, and completed this invention.

That is, the present invention provides the following components (a) and (b):
(A) Spherical particles having a particle size of 25 to 35 μm (b) Cosmetics containing an oil agent, the particle content of the component (a) in the total spherical powder blended in the cosmetics is 20 to 100 volumes. % Of cosmetics characterized by being%.

Further, the present invention provides a cosmetic comprising 2 to 70% by mass of the component (a) in the cosmetic. And the cosmetics characterized by mix | blending 20-80 mass% of said components (b) in the said cosmetics are provided.

Further, the present invention provides any one of the cosmetics described above, wherein an inorganic powder other than the component (a) is blended as the component (c).

Furthermore, water and / or a polyhydric alcohol is mix | blended as a component (d), The said any cosmetics characterized by the above-mentioned are provided.

  Further, the present invention provides any one of the above cosmetics, which is an oily cosmetic or a water-in-oil cosmetic. Then, any one of the above cosmetics is provided, which is a cosmetic for hiding the skin groove.

  The cosmetic of the present invention relates to a cosmetic that has a smooth use feeling and good uniformity of the cosmetic film and is excellent in the effect of making the skin groove inconspicuous.

The spherical particles having a component (a) particle size of 25 to 35 μm used in the present invention generally have a width of 100 to
By selectively covering the pores and skin grooves of a person who is said to have a depth of 20 to 100 μm at 200 μm and filling the grooves, the skin grooves are made inconspicuous.

Spherical particles with a particle size of more than 35 μm have no place to stay stably on the skin, except for those that fall off the skin at the time of application or those that adhere to the applied body or fingers, and continue to roll and are liable to be smeared with the cosmetic film. . Moreover, since this phenomenon also occurs over time, the sustainability of the effect of making pores and skin grooves inconspicuous decreases with time, which is not preferable.

Spherical particles with a particle size of less than 25 μm are not selectively present in pores and skin grooves, that is, they are also present in the skin, so they are less effective in making pores and skin grooves inconspicuous. It may cause a phenomenon that other powder to be dropped into pores or skin grooves, which is not preferable.

The particle size in the present invention represents the size of the particles when applied on the skin, and the particles that cause deformation such as swelling or shrinkage when in contact with the component (b) oil or the like are after deformation. This represents the size of the particles.

  The composition of the spherical particles of the component (a) is not particularly limited, and is not limited to a particle structure such as porous or nonporous, as long as it is a powder normally used in cosmetics. Examples thereof include powders, organic powders, pigment powders, and composite powders. Specifically, organic powders such as silicone powder, nylon powder, cellulose powder, polymethyl methacrylate, polystyrene powder, urethane powder, inorganic powders such as silica and magnesium silicate, shirasu balloon, glass balloon, poly Examples thereof include hollow powders such as methyl methacrylate, and composite powders such as the above-mentioned organic powders, inorganic powders, hollow powders, and the like, and one or two of them can be used. Among these, particles having elasticity such as silicone powder and urethane powder, and particles having high light scattering properties such as nylon powder, cellulose powder, and polymethyl methacrylate silica are particularly preferable.

The meaning of the sphere in the particles of the component (a) of the present invention does not mean only a true sphere, but includes an ellipse, a sphere, and the like. The spherical particles of the component (a) may be those having a smooth surface, those having pores on the surface, and those having minute irregularities on the surface.

  The blending amount of the component (a) spherical particles in the cosmetic of the present invention is not particularly limited, but is preferably 10 to 60% by mass (hereinafter simply referred to as “%”), and more preferably 20 to 50%. When component (a) is blended in this range, the effect of making the skin groove less noticeable is excellent.

  In addition to the spherical particles having the component (a) particle size of 25 to 35 μm, the cosmetic of the present invention can be mixed with a spherical powder having a particle size of less than 25 μm or a particle size of more than 35 μm. The content of the spherical particles having a component (a) particle size of 25 to 35 μm in the body is preferably 20 to 100% by volume. When the component (a) is contained in this range, the effect of making the crevice less noticeable is excellent.

  The component (b) oil used in the present invention serves as a medium for the component (a) at the time of application, and is not particularly limited as long as it is an oil used in ordinary cosmetics. Animal oil, vegetable oil, synthetic oil, etc. Regardless of the origin and characteristics of solid oil, semi-solid oil, liquid oil, volatile oil, etc., hydrocarbons, fats and oils, waxes, hardened oils, ester oils, silicone oils, fluorine oils And oils such as lanolin derivatives. Specifically, paraffin wax, ceresin wax, ozokerite, microcrystalline wax, molasses, montan wax, fisher trops wax, polyethylene wax, liquid paraffin, squalane, petrolatum and other hydrocarbons, carnauba wax, beeswax, lanolin wax, candelilla Natural products such as glyceryl tribehenate, jojoba oil, rosin acid pentaerythritol ester, isopropyl myristate, glyceryl trioctanoate, diglyceryl triisostearate, oils such as olive oil, castor oil, mink oil, Lanolin derivatives such as lanolin fatty acid isopropyl, silicone oils such as dimethylpolysiloxane, silicone wax, methylphenylpolysiloxane, decamethylcyclopen Siloxanes, cyclic silicones such as octamethylcyclotetrasiloxane, perfluorodecane, a fluorine-based oils such as perfluorooctane and the like, can be used on these than one or two.

Although the compounding quantity of the component (b) in the cosmetics of this invention is not specifically limited, 20 to 80% is preferable and 25 to 60% is more preferable. When component (b) is blended in this range, the smooth feeling of use and the uniformity of the cosmetic film are better, and the effect of making the skin groove inconspicuous is excellent.

  In addition to the above-mentioned components, the cosmetic of the present invention further enhances the effect of making the crevice inconspicuous more naturally by blending inorganic powder other than the component (a) as the component (c). be able to. Such a component (c) is a non-spherical inorganic powder used in ordinary cosmetics. If it is a non-spherical shape, a plate-like shape, a needle-like shape, a fumed shape, a fine particle, a pigment grade, etc. There are no particular restrictions on the particle size, porous structure, non-porous particle structure, etc., and examples include inorganic powders, glitter powders, and composite powders. Specifically, titanium oxide, iron-doped titanium oxide, titanium oxide oxide sintered body, cerium oxide, talc, mica, synthetic mica, iron-containing synthetic mica, kaolin, sericite, magnesium carbonate, calcium carbonate, aluminum silicate , Magnesium silicate, calcium silicate, zinc oxide, bengara, yellow iron oxide, black iron oxide, black titanium oxide, barium sulfate, ultramarine, conger, mica titanium, iron oxide mica titanium, etc., one or two of these Seed can be used. Among these, titanium oxide, iron-doped titanium oxide, titanium oxide oxide sintered body, cerium oxide, zinc oxide, bengara, yellow iron oxide, black iron oxide, black titanium oxide, and barium sulfate are particularly preferable. These powders include dimethylpolysiloxane, methylhydropolysiloxane, trimethylsiloxysilicic acid, alkyl-modified silicone, acrylate silicone and other silicone compounds, perfluoropolyether phosphoric acid, perfluoroalkyl phosphoric acid, fluorine-modified silicone. The surface treatment may be performed with a conventionally known compound such as a fluorine compound such as zinc soap, metal soap such as zinc laurate, lecithin, ester oil, and wax.

  Although the compounding quantity of the component (c) in the cosmetics of this invention is not specifically limited, 20 to 60% is preferable. When component (c) is blended in this range, the effect of making the crevice inconspicuous more naturally is excellent.

In addition to the above-described components, the cosmetic of the present invention is further blended with water and / or a polyhydric alcohol as component (d) to give a refreshing feeling and a moisturizing effect, and component (c) is added to the skin. The effect of component (a) is further enhanced by the action kept on. Specifically, water,
1,3-butylene glycol, glycerin, sorbitol, propylene glycol, mannitol, dipropylene glycol, diglycerin and the like can be mentioned, and one or two of these can be used.

  Although the compounding quantity of the component (d) in the cosmetics of this invention is not specifically limited, 20 to 50% is preferable. When component (d) is blended in this range, the effect of making the skin groove less noticeable is excellent.

In addition to the above components, the cosmetic of the present invention contains water-soluble polymers, ultraviolet absorbers, paraoxybenzoic acid derivatives, preservatives such as phenoxyethanol, vitamins, cosmetic ingredients, moisturizers, surfactants, and the like. It can mix | blend suitably in the range which does not impair an effect.

  The cosmetics of the present invention are cosmetics that make the skin groove inconspicuous, but make-up cosmetics such as eye color, eyebrow, foundation, blusher, white powder, base, etc. The present invention can be applied to skin care cosmetics, sunscreen cosmetics, and the like obtained by adding a skin groove concealing effect to conventional cosmetics.

The cosmetic dosage form of the present invention comprises a component (b) as a dispersion medium for the component (a) when applied on the skin.
However, oily cosmetics and water-in-oil cosmetics are preferred.

The form of the cosmetic of the present invention is not particularly limited, and may be any of powder, liquid, paste, emulsion, cream, gel, solid and the like. In the case of powder, it is preferable that the component (b) is liquefied at the time of application and acts as a dispersion medium for the component (a).

The following examples further illustrate the present invention. In addition, these do not limit this invention at all.

Examples 1 to 7 and Comparative Examples 1 to 4: Oily foundation for concealing skin groove The foundation having the composition shown in Table 1 was prepared by the following method, and “(I) Uniformity of cosmetic film” and “(B) smooth “Easy to use” and “(c) difficulty in conspicuous skin groove” were evaluated by the following evaluation methods and criteria, and the results are shown in Table 1.

(Manufacturing method)
A: Components 10 to 15 are heated to 80 ° C. and dissolved.
B: Components 1 to 9 are added to [A] and uniformly dispersed.
C: [B] was heated again to 80 ° C., and filled in a metal pan to obtain an oily foundation for concealing the skin groove.

[Evaluation methods and criteria]
The oily foundations for concealing pores / skins of Examples 1 to 7 and Comparative Examples 1 to 4 were used by 20 professional cosmetic panels, and “(I) Uniformity of cosmetic film” and “(B) smooth For each item of “Usability” and “(c) Hardness of skin groove conspicuousness”, a score is assigned to each foundation according to the evaluation criteria shown below, and the following judgment is made based on the average score of all the panels. Judgment was made according to criteria. In addition, “(c) difficulty in conspicuous skin groove” was evaluated by comparing the face with left and right sides and applying the foundation only to one side and comparing with the uncoated part.

(Evaluation criteria)
Evaluation result: Score
Very good: 5 points
Good: 4 points
Normal: 3 points
Slightly bad: 2 points
Defect: 1 point

(Criteria)
Average score of all panels: Judgment
4.5 or more: ◎
3.5 or more and less than 4.5 points: ○
2.0 or more and less than 3.5 points:
Less than 2.0 points: ×

  As shown in Table 1, the oily foundation for concealing the skin groove of Examples 1 to 7, which are the products of the present invention, is “(I) Uniformity of the cosmetic film”, “(B) Smooth use feeling”, “ It was an excellent cosmetic for all items of “(c) Difficulty of skin groove”. On the other hand, Comparative Example 1 containing no spherical particles has no effect of making the skin groove inconspicuous. Further, in Comparative Examples 2 and 3, which do not contain 20% by volume or more of spherical particles having a particle size of 25 to 35 μm, and in Comparative Example 4 which contains spherical particles having a particle size of more than 35 μm, both have the effect of making the skin groove inconspicuous. It was not good.

Next, after applying the foundations of Example 1 and Comparative Example 2 to the skin, a replica film agent (mixed adhesive of epoxy resin and polythiol) was applied thereon, dried for 30 minutes, and then the replica film. The film was peeled off, further dried, and an electron micrograph was taken to confirm where the spherical particles were present in the skin. 1 and 2 are electron micrographs when the foundation of Example 1 is applied, and FIGS. 3 and 4 are electron micrographs when the foundation of Comparative Example 2 is applied.

In FIGS. 1-4, the part of a pore and a skin groove becomes high, and the cuticle part becomes low. (Because the skin-like cosmetic film is inverted to a replica.) In FIGS. 1 and 2, the bulging portions such as mountains are pores and skin grooves, but spherical particles are selectively gathered in these portions. On the other hand, the skin part is smooth and it can be seen that there are no spherical particles. On the other hand, in FIG.3 and FIG.4, it turns out that spherical particle | grains exist in the pore, the crevice part which swells like a mountain, and the whole skin part. That is, as shown in FIG. 1, the present invention smoothes the entire skin by selectively embedding spherical particles having a particle size of 25 to 35 μm in the skin groove portion, thereby making the skin groove inconspicuous. It is.

Examples 8 to 9 and Comparative Examples 5 to 6: Water-in-oil creamy foundation for skin groove concealment A foundation having the composition shown in Table 2 was prepared by the following method, and “(I) Uniformity of cosmetic film”, “(B) Smooth feeling of use” and “(c) Difficulty of skin groove conspicuousness” were evaluated in the same manner as described above by the evaluation method and criteria, and the results are also shown in Table 2.

(Manufacturing method)
A: Components 1 to 12 are mixed and dispersed.
B: Components 13 to 15 are added to [A] and emulsified.
C: [B] was filled in a container to obtain a water-in-oil creamy foundation for hide skin.

  As shown in Table 2, the oily foundation for concealing the skin groove of Examples 8 to 9, which are the products of the present invention, is “(i) Uniformity of the cosmetic film”, “(b) Smooth feeling of use”, “ It was an excellent cosmetic for all items of “(c) Difficulty of skin groove”. Moreover, since the foundation of Example 8 had the skin color compared with the foundation of Example 9, it made the skin crevice not stand out more naturally. And the foundation of the comparative example 5 which does not contain the spherical particle of a component (a) was not good in the effect which makes a skin groove not conspicuous. Furthermore, the foundation of Comparative Example 6 containing a partially crosslinked organopolysiloxane, which is a technique described in Patent Document 1 described in the prior art, is not sufficiently effective to make the skin groove inconspicuous, and the makeup film is uniform. The sex was inferior.

Example 10: Powdered face color for hiding skin groove (component) (%)
1. Fluorine compound-treated mica titanium (Note 8) Fluorine compound-treated talc (Note 8) 20
3. Fluorine compound-treated bengara (Note 8) 0.5
4). Spherical polymethyl methacrylate powder with an average particle size of about 30 μm (Note 4) 10
5. Methyl paraoxybenzoate 0.2
6). Stearyl Dimethicone (Note 9) 40
* Note 8: Perfluoroalkyl phosphate diethanolamine 3% treatment * Note 9: Silicon DC2503 (Toray Dow Corning Silicone Co., Ltd.)

(Manufacturing method)
A: Components 1 to 5 are mixed and dispersed.
B: Add component 6 dissolved by heating to [A], and mix and disperse.
C: A powdery face color for concealing the skin groove was obtained in [B].
The powdery face color for concealing the skin groove of Example 10, which is an embodiment of the present invention, is “(I) Uniformity of cosmetic film”, “(B) Smooth use feeling”, “(C) Conspicuous skin groove” It was an excellent cosmetic for all items of “Nikusa”.

Replica photo of skin with skin groove concealing cosmetic applied in Example 1 of the present invention Replica photo of skin applied with skin cover concealing cosmetic material of Example 1 of the present invention (enlarge) Replica photo of skin with skin groove concealing cosmetic applied in Comparative Example 2 of the present invention Replica photo of skin applied with skin cover concealing cosmetic material of Comparative Example 2 of the present invention (enlarged)

Claims (8)

The following components (a) and (b);
(A) Spherical particles having a particle size of 25 to 35 μm (b) Cosmetics containing an oil agent, the particle content of the component (a) in the total spherical powder blended in the cosmetics is 20 to 100 volumes. % Cosmetics characterized by%. The cosmetic according to claim 1, wherein 2 to 70% by mass of the component (a) in the cosmetic is blended. The cosmetic according to claim 1 or 2, wherein 20 to 80% by mass of the component (b) in the cosmetic is blended. Furthermore, inorganic powder other than the said component (a) is mix | blended as a component (c), Cosmetics in any one of Claims 1-3 characterized by the above-mentioned. Furthermore, water and / or a polyhydric alcohol are mix | blended as a component (d), Cosmetics in any one of Claims 1-4 characterized by the above-mentioned.   The cosmetic according to any one of claims 1 to 5, which is an oily cosmetic.   The cosmetic according to any one of claims 1 to 5, which is a water-in-oil cosmetic. The cosmetic according to any one of claims 1 to 7, wherein the cosmetic is a skin cover concealing cosmetic.