JP3348945B2 - Powder cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder cosmetic containing a plate-like powder having a specific particle size distribution, a spherical powder, and a waxy fluorine-containing polymer. The present invention relates to a powder cosmetic which achieves both excellent adhesion to the skin and spreadability, has no powderiness, has a bare skin feeling, and can obtain a very fine finish, and in particular, has a small amount of distortion after makeup.

[0002]

2. Description of the Related Art As cosmetics containing cosmetic powders, makeup cosmetics such as foundation, white powder, blusher, eye shadow, eyebrow and the like; body cosmetics such as body powder and baby powder are commercially available. I have. Cosmetic powders used in these cosmetics are generally roughly classified into three types: extender pigments, coloring pigments, and composite pigments thereof. Of these powders, relatively large amounts are extender pigments and composite pigments of extender pigments and color pigments (hereinafter simply referred to as composite pigments). The properties greatly affect each cosmetic performance. Cosmetic performance, which is a problem in cosmetics containing powder for cosmetics, includes good spreadability and adhesion on the skin, no squeaky feeling, no roughness, no powdery feeling. In addition, the fineness of the finish, the feeling of bare skin, and the like can be cited, but those that greatly affect the cosmetic performance are considered to be the physical properties and characteristics of the extender pigment.

[0003] The present inventors have previously considered that mica having a specific particle size distribution, which is inferior in its spreadability by itself but excellent in adhesion, is combined with a monodispersed microspherical powder. By blending in a cosmetic, a cosmetic exhibiting excellent adhesion and spreadability has been successfully obtained (Japanese Patent Laid-Open No. Hei 4-23030).
No. 6). However, this cosmetic also has a drawback in that when a long time elapses after the makeup, the pigment collects in a rapidly moving portion, a skin groove, or the like, that is, causes so-called “skew”, which causes a makeup loss.

[0004] When a cosmetic pigment, a cosmetic oil agent and a waxy fluorine-containing polymer are used in combination as a solid powder cosmetic, excellent adhesion to the skin, oil repellency is improved, and cosmetic durability is improved. In addition, it is known that solid powder cosmetics having increased filling strength and excellent impact resistance can be obtained (Japanese Patent Application Laid-Open No. 4-89422). But,
Although this product is also excellent in impact resistance and adhesion, it has a drawback that it is inferior in use feeling, and particularly inferior in spreadability and the like due to its high viscosity.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a powder cosmetic which is excellent in adhesion to skin and spreadability, and which does not lose its makeup even after a long period of time after makeup, and has a long lasting makeup. The purpose is to do so.

[0006]

Under such circumstances, the inventors of the present invention have conducted intensive studies and as a result, have found that the above-mentioned plate-like powder and spherical powder having a specific particle diameter are used in combination with a waxy fluorine-containing polymer. When blended together, the cohesiveness of the powders (cohesive force between powders) is significantly reduced, showing high adhesion and excellent spreadability, and maintaining high adhesion, so that the makeup lasts, especially Have been remarkably improved and the above problem can be solved, and the present invention has been completed.

That is, the present invention provides the following components (a) to
(C): (a) Mica, mica, talc, and sericite having a volume cumulative average particle diameter of 2 to 10 μm, and particles having a particle diameter of 1.5 μm or less and particles having a particle diameter of 24 μm or less, each having 5% by volume or less. (B) spherical powder having a volume cumulative average particle diameter of 0.01 to 2 μm, 0.5 to 50% by weight, and (c) an alkyl group having 16 to 22 carbon atoms. Containing 0.1 to 5% by weight of a copolymer of a (meth) acrylate having a (meth) acrylate and a (meth) acrylate having a perfluoroalkyl group or a polyfluoroalkyl group having 4 or more carbon atoms. Provide cosmetics.

The plate-like powder of the component (a) used in the present invention includes, for example, mica, mica, talc, sericite and the like. This plate-like powder has a volume cumulative average particle size of 2
Particles having a particle size of 1.5 μm or less and 24
It is necessary that each of the particles having a particle diameter of more than 5 μm is 5% by volume or less. Preferably,
In the present invention, the particle size is determined by a laser diffraction method using water as a dispersion medium.

Such a plate-like powder having a specific particle size distribution is produced by classification according to a conventional method such as, for example, a wet sieve, a wet centrifuge, an air classifier, or a combination thereof.

Further, the surface of the plate-like powder is treated with metal soap, silicon, dialkyl phosphoric acid, perfluoroalkyl group-containing compound, acylated amino acid,
Those treated with lecithin treatment, collagen treatment or the like may be used.

The compounding amount of the plate-like powder of the component (a) is preferably 30 to 95% by weight, particularly 35 to 70% by weight of the powder cosmetic.

The spherical powder of the component (b) used in the present invention includes, for example, metal oxides such as spherical alumina, spherical silica, spherical zirconia, spherical titanium oxide and spherical zinc oxide; polyester, polyethylene, polystyrene, methacrylic acid Plastics such as methyl resin, copolymer of styrene and acrylic acid, polypropylene, acrylic beads, and polyolefin; silica-based composite oxide, silicon resin, aluminum silicate, and cellulose.

The volume cumulative average particle diameter of the spherical powder is 0.0
The thickness is from 1 to 2 μm, and particularly preferably from 0.1 to 1 μm. Further, a monodisperse spherical powder having a coefficient of variation (standard deviation / average particle diameter × 100) of 10% or less, particularly 5% or less, having a true spherical shape and a narrow particle size distribution is more preferable.

The compounding amount of the spherical powder of the component (b) is preferably 0.5 to 50% by weight, particularly preferably 1 to 20% by weight of the powder cosmetic.

The waxy fluorine-containing polymer of the component (c) in the present invention includes a (meth) acrylate having an alkyl group having 16 to 22 carbon atoms and a perfluoroalkyl group or a polyfluoroalkyl group having 4 or more carbon atoms. (Meth) acrylate copolymers.

Examples of the alkyl (meth) acrylate having an alkyl group having 16 to 22 carbon atoms include esters of alcohols such as cetyl alcohol, stearyl alcohol, and behenyl alcohol with (meth) acrylic acid. Examples of the (meth) acrylate having a group or a polyfluoroalkyl group include:
For example, the following compounds may be mentioned.

CH ₂ = CHCOOC ₂ H ₄ C ₆ F ₁₃ , CH ₂ = CHCOOC ₂ H ₄ C
₈ F ₁₇ , CH ₂ = CHCOOC ₂ H ₄ C ₁₀ F ₂₁ , CH ₂ = CHCOOC ₂ H ₄ C ₁₂ F ₂₅ , CH ₂ =
C (CH ₃ ) COOC ₂ H ₄ C ₆ F ₁₃ , CH ₂ = C (CH ₃ ) COOC ₂ H ₄ C ₈ F ₁₇ , CH ₂ = C (C
H ₃ ) COOC ₂ H ₄ C ₁₀ F ₂₁ , CH ₂ = C (CH ₃ ) COOC ₂ H ₄ C ₁₂ F ₂₅ , CH ₂ = CHCO
_{OC 2 H 4 - (CF 2} ) 4 -H, CH 2 = CHCOOC 2 H 4 - (CF 2) 5 -H, CH 2 = C (CH 3) C
_{OOC 2 H 4 - (CF 2} ) 4 -H, CH 2 = C (CH 3) COOC 2 H 4 - (CF 2) 5 -H

The copolymerization ratio of the long-chain alkyl (meth) acrylate to the (meth) acrylate having a fluorinated alkyl group is from 10: 1 to 1 in view of solubility, dispersibility and stickiness. : 5 (weight ratio), especially 7: 1 to 1
1: 1 is preferred. The molecular weight of the copolymer is from 1,000 to 2,000 in terms of friction resistance, stickiness and the like.
It is preferably 0000, particularly 10,000 to 500,000.

These copolymers are disclosed, for example, in
It can be manufactured according to the method described in JP-A-28909.

The waxy fluorine-containing polymer of the component (c) can be used alone or in combination of two or more, and is contained in the cosmetic powder in an amount of 0.1 to 5% by weight, preferably 0.1 to 5% by weight.
5 to 3.0% by weight is blended.

The powder cosmetic of the present invention contains, in addition to the above essential components, components used in ordinary cosmetics, such as surfactants, antioxidants, fragrances, pigments, alcohols, polyhydric alcohols, and the like. A soiling agent, an ultraviolet absorber, a humectant, water and the like can be appropriately blended.

The powder cosmetic of the present invention can be produced according to a conventional method, and can be applied as a face powder, a body powder, a powder foundation, a blusher, an eye shadow or the like.

[0023]

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

Example 1 Eye Shadow An eye shadow having the composition shown in Table 1 was produced according to a conventional method.
The product of the present invention and comparative products 1 to 3 by 20 specialized panelists
Was evaluated by comparing the feeling of use with respect to spreading and adaptation when coating was applied, and the fading and distorted color over time. Table 2 shows the results.
Shown in

[0025]

[Table 1]

[0026]

[Table 2]

As is evident from Table 2, the eye shadow of the present invention had a feeling of use, little discoloration and distorted over time, and had a long lasting makeup.

Example 2

[0029]

Table 3 Composition (%) (1) Talc (volume cumulative average particle diameter 7μ, particle 3% with particle diameter of 1.5μm or less, particle 3% with particle diameter exceeding 24μm) Remaining amount (2) Mica (volume cumulative average) Particle size 4μ, particle size 1.5% or less 3%, particle size exceeding 24μm 3%) 10.0 (3) Polymethyl methacrylate (volume cumulative average particle size 0.4μ, monodisperse spherical powder) 2 0.0 (4) Titanium mica 18.0 (5) Hydrophobized red No. 202 0.5 (6) Hydrophobized red No. 226 1.0 (7) Liquid paraffin 2.0 (8) Squalane 3.0 ( 9) Fluorine-containing polymer (same as in Example 1) 0.5 (10) Paraben 0.1 (11) Fragrance 0.1

Example 3 Solid foundation

[0031]

[Table 4] Composition (%) (1) Talc (volume cumulative average particle diameter 7μ, particle 3% with particle diameter of 1.5μm or less, particle 3% with particle diameter over 24μm) Remaining amount (2) Mica (volume cumulative average) Particle size 5.8μ, particle size 1.5μm or less 2.24%, particle size over 24μm 0.87%) 30.0 (3) Silica-based composite oxide (volume cumulative average particle size 0 (4 μ, spherical powder) 10.0 (4) Titanium dioxide 10.0 (5) Bengala 0.8 (6) Yellow iron oxide 0.5 (7) Titanium mica 5.0 (8) Dimethyl polysiloxane 3. 8 (9) Fluorine-containing polymer (same as in Example 1) 1.0 (10) Octyldodecyl myristate 2.4 (11) Squalane 3.6 (12) Paraoxybenzoate 0.1 (13) Fragrance 0. 1

Example 4 Pressed Powder

[0033]

Table 5 Composition (%) (1) Talc (volume cumulative average particle size 5μ, particle 3% with particle size of 1.5μm or less, particle 3% with particle size over 24μm) Remaining amount (2) Mica (volume cumulative average) Particle size 6μ, particle size 1.5% or less 2.5%, particle size exceeding 24 μm 1%) 40.0 (3) Spherical silica beads (cumulative volume average particle size 0.1μ) 10.0 (4 ) Titanium oxide 0.5 (5) Bengala 0.1 (6) Yellow iron oxide 0.1 (7) Black iron oxide 0.01 (8) Liquid paraffin 6.0 (9) Beeswax 2.0 (10) Fluorine Containing polymer (same as in Example 1) 2.0 (11) Preservative 0.1 (12) Fragrance 0.05

Example 5 Body Powder

[0035]

[Table 6] Composition (%) (1) Sericite (volume cumulative average particle diameter 6μ, particle 3% with particle diameter of 1.5μm or less, particle 3% with particle diameter exceeding 24μm) Remaining amount (2) Mica (volume accumulation (3) (3) (3) Spherical silica beads (volume cumulative average particle size 1 μ) 5.0 (4) Fluorine-containing polymer (same as in Example 1) 1.0 (5) Anti-inflammatory agent 0.1 (6) Preservative 0.1 (7) Perfume 0.05

[0036]

Industrial Applicability The powder cosmetic of the present invention has high adhesiveness and excellent spreadability, and has the characteristics that there is no color fading or distortion over time after makeup.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-230306 (JP, A) JP-A-5-58841 (JP, A) JP-A-4-221306 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A61K ^7/ 00-7/50

Claims (1)

(57) [Claims] 1. The following components (a) to (c): (a) 5% of particles having a volume cumulative average particle diameter of 2 to 10 μm, each having a particle diameter of 1.5 μm or less and each having a particle diameter of more than 24 μm. % Or less, a plate-like powder selected from mica, mica, talc and sericite of 30 to 95% by weight, (b) a spherical powder having a volume cumulative average particle diameter of 0.01 to 2 μm 0.5 to 50% by weight (C) a copolymer of a (meth) acrylate having an alkyl group having 16 to 22 carbon atoms and a (meth) acrylate having a perfluoroalkyl group or a polyfluoroalkyl group having 4 or more carbon atoms 0.1 to 5 A powder cosmetic, characterized by containing by weight.