JP6029401B2 - Solid cosmetic for unevenness correction - Google Patents

Description

  The present invention relates to a solid cosmetic for correcting irregularities, and in particular, relates to a solid cosmetic for correcting irregularities that has a high effect of correcting irregularities of small wrinkles and pores, is less likely to whiten, and has excellent usability when applied.

  Conventionally, cosmetics for making the unevenness of the skin such as wrinkles, pores, and roughness of the skin inconspicuous have been desired, and various studies have been made. It has been proposed that a powder component having a light diffusing effect is blended as a cosmetic that provides such an unevenness correcting effect. By blending a powder component having a light diffusing effect, light transmitted through the decorative coating film is diffused, and it is considered that the unevenness becomes inconspicuous by blurring the light / dark boundary of the base (skin).

  For example, Patent Document 1 discloses an oily skin external preparation containing a composite powder in which zinc oxide is coated on the surface of a lipophilic base powder such as silicone resin-coated silicone rubber, and an oil component. Since the composite powder adsorbs plasminogen activator and inhibits its activity, the composite powder is said to be excellent in improving and preventing rough skin. In addition, since the composite powder has high light diffusibility, it has been shown that the composite powder has an excellent effect of correcting unevenness of the skin.

  Further, in Patent Document 2, a silicone gel base material is used as a continuous phase, and a silicone powder composed of a crosslinked silicone / network silicone block copolymer and a crosslinked polymethyl methacrylate (PMMA) powder are blended therein. An oily cosmetic is disclosed. It has been shown that an excellent correction effect, skin feel and transparency can be obtained by using silicone powder and PMMA powder in combination and setting the blending ratio thereof within a predetermined range.

  However, there is still a demand for a cosmetic material for correcting irregularities that is superior to conventional ones, that is, a solid cosmetic material for correcting irregularities that has a high unevenness correcting effect and at the same time gives a natural skin feeling that does not cause whitening and is excellent in use feeling. .

JP 2004-217621 A JP 2005-41795 A

  The present invention has been made in view of the above circumstances, exhibits a high unevenness correction effect, and at the same time does not impair the skin-specific transparency, and is excellent in use feeling such as smoothness and smoothness when applied. An object of the present invention is to provide a solid cosmetic for correcting unevenness.

  As a result of extensive research, the present inventors have obtained (A) a composite powder in which zinc oxide is coated on the surface of (A) (vinyl dimethicone / methicone silsesquioxane) cross-polymer particles, and (B) a predetermined average particle diameter. It was found that by combining with (vinyl dimethicone / methicone silsesquioxane) cross-polymer particles of the above, it has a high unevenness correction effect and at the same time, hardly causes whitening and can improve the feeling of use, and the present invention is completed. It came to do.

That is, the present invention
(A) (vinyl dimethicone / methicone silsesquioxane) a composite powder in which the surface of a cross polymer particle is coated with zinc oxide;
(B) A solid cosmetic for correcting irregularities containing (vinyl dimethicone / methicone silsesquioxane) cross-polymer particles having an average particle diameter of 1 to 50 μm.

  According to the solid cosmetic for correcting irregularities according to the present invention, (A) (vinyl dimethicone / methicone silsesquioxane) cross-polymer particle surface composite powder in which zinc oxide is coated, and (B) (vinyl dimethicone / By using in combination with the methicone silsesquioxane) cross-polymer particles, it is possible to provide a cosmetic excellent in all of the unevenness correction effect, the skin transparency, and the feeling of use.

The solid cosmetic for unevenness correction of the present invention is
(A) (vinyl dimethicone / methicone silsesquioxane) a composite powder in which the surface of a cross polymer particle is coated with zinc oxide;
(B) (vinyl dimethicone / methicone silsesquioxane) cross-polymer particles. Hereinafter, the present invention will be described in detail.

<A composite powder in which zinc oxide is coated on the surface of (A) (vinyl dimethicone/methicone silsesquioxane) crosspolymer particle>
(Vinyl Dimethicone / Methicone Silsesquioxane) A composite powder in which the surface of a cross polymer particle is coated with zinc oxide (hereinafter referred to as “(A) composite powder”) is (vinyl dimethicone / methicone silsesquioxane). It is a powder in which zinc oxide is combined and integrated on the surface of cross polymer particles.

  (A) The (vinyl dimethicone / methicone silsesquioxane) cross-polymer particles serving as the base material of the composite powder are silicone composite powders in which a silicone rubber surface is coated with a three-dimensional network-like silicone resin. Among them, those having a spherical particle shape are preferable because they have a high light diffusion effect, can give a natural skin feeling, and are excellent in an improvement in use feeling. The average particle diameter of the cross-polymer particles is 1 to 20 μm, particularly preferably 1 to 10 μm. As a commercial item, the brand name "KSP-100" by Shin-Etsu Chemical Co., Ltd. etc. are used suitably, for example. In the present specification, “average particle size” means the cumulative 50% particle size in the particle size distribution determined by the laser diffraction / scattering method.

  (A) The zinc oxide coated on the surface of the composite powder (vinyl dimethicone / methicone silsesquioxane) crosspolymer particle is not particularly limited as long as it is in the form of fine particles generally used in cosmetics. The average particle diameter of zinc oxide is not particularly limited as long as it can be coated on the surface of the (vinyl dimethicone / methicone silsesquioxane) crosspolymer particle, but the ratio of the average particle diameter is (vinyl dimethicone / methicone silsesquioxane). ) Crosspolymer particles: zinc oxide = 1: 1 to 10000: 1, more preferably 5: 1 to 1000: 1.

(Vinyl dimethicone / methicone silsesquioxane) The method of coating the surface of the cross polymer particles with zinc oxide to form a composite integral is not particularly limited. For example, mechanically strong compression / shearing force is applied for mixing. In particular, a mechanofusion process described in Patent Document 1 can be used.
The composite powder may be a commercial product, for example, trade name “HFP-SZ-13” manufactured by Nippon Pigment Co., Ltd. may be used.

  The content of the composite powder (A) in the unevenness correcting solid cosmetic of the present invention is not particularly limited as long as the effect of the present invention is obtained, and can be appropriately adjusted and used. -10 mass%, preferably 0.1-5.0 mass%, more preferably 1.0-5.0 mass%. If it is less than 0.001% by mass, the unevenness correction effect may not be sufficiently exhibited, and if it exceeds 10% by mass, the use feeling tends to be impaired.

<(B) (Vinyl Dimethicone / Methicon Silsesquioxane) Cross Polymer Particle>
(B) (vinyl dimethicone / methicone silsesquioxane) cross-polymer particles (hereinafter referred to as “(B) cross-polymer particles”) are used for the base material of the composite powder (A) described above (vinyl dimethicone / Similar to (methicon silsesquioxane) cross-polymer particles, it is a silicone composite powder in which a silicone rubber surface is coated with a three-dimensional network-like silicone resin.

(B) The shape of the cross-polymer particles is preferably spherical because it is excellent in the effect of imparting a natural skin feel and feel in use. (B) The average particle diameter of the cross-polymer particles is preferably 1 to 50 μm because whitening hardly occurs and a remarkable improvement effect is exhibited in the feeling of use. If it is in the said range, it can also be used combining the some particle group from which an average particle diameter differs. Among them, those having an average particle diameter of 3 to 8 μm (hereinafter referred to as “particle group (I)”) are excellent in pore correction effect, and those having an average particle diameter of 25 to 35 μm (hereinafter referred to as “particle group (II)”). ")" Tends to be excellent in use feeling. For this reason, by using these particle groups (I) and (II) in combination, not only the effect of naturally blurring pores is high, but also a smooth and smooth feel during application can be remarkably improved. In this case, it is preferable to mix the particle group (I) and the particle group (II) so that the weight ratio is in the range of I: II = 1: 10 to 10: 1.
(B) As a commercial item of cross polymer particles, for example, trade names “KSP-100”, “KSP-101”, “KSP-102”, “KSP-105” and the like manufactured by Shin-Etsu Chemical Co., Ltd. are preferable, In particular, it is preferable to use a trade name “KSP-102” or the like having an average particle diameter of 30 μm and a trade name “KSP-100” or the like having an average particle diameter of 5 μm.

  The content of the (B) cross polymer particles in the solid cosmetic for correcting irregularities of the present invention is not particularly limited as long as the effect of the present invention is obtained, and can be appropriately adjusted and used. -15 mass%, preferably 0.1-12 mass%, more preferably 1.0-10 mass%. If it is less than 0.001% by mass, the effect of improving the feeling of use may not be sufficiently exhibited, and if it exceeds 15% by mass, it may be unfavorable in terms of formulation.

<Other ingredients that can be blended>
The solid cosmetic for correcting unevenness according to the present invention is an oil usually blended in the fields of cosmetics and quasi-drugs, such as liquid oils, solid oils, waxes, hydrocarbons, higher fatty acids, higher alcohols, ester oils. , Fluorine oil and the like can be included.
Specifically, liquid oils such as avocado oil, camellia oil, macadamia nut oil, mink oil, olive oil, castor oil, jojoba oil, triglycerin, glycerin trioctanoate, hydrocarbons such as liquid paraffin, squalane, paraffin, ceresin, squalene Higher fatty acids such as lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, 12-hydroxystearic acid, isostearic acid, linoleic acid, linolenic acid, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, oleyl Alcohol, monostearyl glycerol ether, monopalmityl glycerol ether, higher alcohols such as cholesterol, phytosterol, isostearyl alcohol, isononanoic acid isonononi , Isopropyl myristate, cetyl octanoate, octyldodecyl myristate, butyl stearate, decyl oleate, ethylene glycol dioctanoate, diisostearyl malate, trimethylolpropane trioctanoate, trimethylolpropane triisostearate, pentatetraoctanoate Erythritol, glycerin trioctanoate, glyceryl triisostearate, ester oils such as ethyl acetate, butyl acetate, and amyl acetate, linear silicones such as dimethylpolysiloxane, methylphenylpolysiloxane, methylhydrogenpolysiloxane, and diphenylsiloxyphenyltrimethicone Oil, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, octamethylcyclotetrasiloxane, etc. Cyclic silicone oil, beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nuka wax, lanolin, kapok wax, molasses, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced Lanolin, jojoballow, hard lanolin, shellac wax, bees wax, microcrislin wax, paraffin wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, fatty acid crislide, hydrogenated castor oil, petrolatum, POE Examples thereof include oils and fats that are solid or semi-solid at room temperature, such as hydrogenated lanolin alcohol ether.
In this invention, these 1 type (s) or 2 or more types can be used in combination.

In addition, within the range not impairing the effects of the present invention, components usually blended in the field of cosmetics and quasi-drugs, such as UV absorbers, moisturizers, fragrances, surfactants, various medicinal ingredients, preservatives Antioxidants, powders, pigments and the like can be blended as necessary.
In particular, cosmetic ingredients known as feel improvers and lubricants, such as polymethyl methacrylate, silica, dimethylsilylated silica and the like may be further blended.

  The solid cosmetic for correcting irregularities according to the present invention can be produced according to a conventionally used method. For example, it can be produced by separately mixing an oil component and a powder component, adding the powder component to the oil component, stirring, filling, and pressing as necessary.

  The use of the solid cosmetic for unevenness correction according to the present invention can be applied particularly to products such as balm, solid cream, and stick for correcting unevenness for the face or body.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in more detail, this invention is not limited by these Examples. Unless otherwise specified, the blending amount indicates mass%.

  A solid cosmetic (sample) for correcting irregularities was prepared according to the formulation shown in Table 1 below, and the pore correction (blurring) effect, no whitening, smoothness and smoothness were examined according to the following evaluation methods. The results are also shown in Table 1.

10 professional panels apply each sample to the cheeks to make the pores on the skin after application, fine wrinkles and other irregularities visually inconspicuous (pore correction (blurring) effect), natural skin Transparency (no whitening) and feel when applied (smoothness / smoothness) were evaluated according to the following evaluation criteria.
◎: 8-10 out of 10 professional panels were evaluated as good ○: 5-7 out of 10 professional panels were evaluated as good △: 2-4 out of 10 professional panels were evaluated as good ×: 0-1 out of 10 professional panelists rated it as good

* 1: KSP-100 (Shin-Etsu Chemical Co., Ltd.)
* 2: KSP-102 (Shin-Etsu Chemical Co., Ltd.)
* 3: HFP-SZ-13 (Nippon Pigment Corporation)

As shown in Table 1, sufficient results were not obtained in all evaluation items even when (A) the composite powder was not blended and (B) the component corresponding to the crosspolymer particles was blended ( Comparative Example 1). Further, when (A) the composite powder was not blended, even when Nylon-12, which is known as a component for improving the touch, and water-containing silica were blended, whitening was conspicuous, and the feeling of use during coating was poor ( Comparative examples 2 and 3). Furthermore, even when polymethyl methacrylate (PMMA) powder, which is an essential component in Patent Document 2, was blended, sufficient effects were not obtained in terms of use feeling and skin transparency (Comparative Example 4). It should be noted that in the case where (A) the composite powder was not blended, even if the (B) cross polymer particles were blended, satisfactory results could not be obtained even with the feeling of use (Comparative Examples 1-4). ).
On the other hand, when both (A) composite powder and (B) cross polymer particles were blended, satisfactory results were obtained in all evaluation items (Examples 1 to 7). In particular, when (B) cross-polymer particles having an average particle size of 5 μm are blended, the pore correction effect is excellent (Examples 1 to 5), and those having an average particle size of 30 μm are used. It was confirmed that there was a tendency to feel excellent (Examples 6 and 7). In order to reflect this tendency, when (B) cross polymer particles are blended with an average particle size of 5 μm and 30 μm in combination, they are highly evaluated for both pore correction effect and use feeling. Obtained (Example 6).

Claims (2)

(A) (vinyl dimethicone / methicone silsesquioxane) a composite powder in which the surface of a cross polymer particle is coated with zinc oxide;
(B) (vinyl dimethicone / methicone silsesquioxane) cross-polymer particles ,
The (B) (vinyl dimethicone / methicone silsesquioxane) cross-polymer particle is composed of a combination of a particle group having an average particle diameter of 3 to 8 μm and a particle group having an average particle diameter of 25 to 35 μm. unevenness correction for solid cosmetics. The weight ratio of the particle group having an average particle diameter of 3 to 8 μm and the particle group having an average particle diameter of 25 to 35 μm constituting the (B) (vinyl dimethicone / methicone silsesquioxane) crosspolymer particle is 1:10 to 10: The solid cosmetic for unevenness correction according to claim 1, which is within a range of 1.