JP3023688B2 - Cosmetics - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a cosmetic which is imparted with excellent feeling and usability by containing a hollow foamed resin sphere.

[Prior art and its problems] Conventionally, various powders for cosmetics have been known and used by being blended into cosmetics. In particular, make-up cosmetics are blended with various inorganic powders, organic powders and the like, including white pigments, colored pigments, extender pigments, and the like, in consideration of the makeup effect, feeling of use, usability, and the like.

Among these cosmetic powders, titanium oxide, zinc oxide,
BACKGROUND ART White inorganic pigments such as barium sulfate are often blended with makeup cosmetics for the purpose of coating the skin and for enhancing the adhesion and adhesion of the cosmetic to the skin. However, since these white inorganic pigments have a strong cohesive force between powders, they feel heavy at the time of application and spread poorly, and in the case of a solid powder makeup cosmetic, the solidification of the cosmetic surface is caused, and In some cases, it may cause a so-called caking phenomenon. For this reason, these powders are made spherical to improve spreadability.

In addition, in order to extend the skin to the skin at the time of use, to provide a feeling of sliding, to prevent caking of the solid powder make-up cosmetics, and to obtain a good take-off on the applied body, it is common to use a constitutional inorganic pigment such as talc or mica. Recently, spherical organic powders such as nylon powder, polystyrene powder, polyethylene powder and polymethyl methacrylate powder or spherical inorganic powders such as anhydrous silica have been recently added.

As described above, in order to improve the usability such as spreadability, application feeling and the like, and the usability such as removal from a coated body and sustainability, a technique utilizing the powder characteristics specific to spherical powders has been proposed.

On the other hand, as a technique of applying a resin powder having a spherical outer shape and having a hollow inside to a cosmetic, for example, a technique of blending a compressible collapsible soft spherical capsule containing various components (Japanese Patent Application Laid-Open No. 59-73510) ), A technique of blending a spherical polymer having spherical vacuoles with a specific particle size and specific gravity (Japanese Patent Laid-Open No. 60-18 / 1985)
No. 4004), and a technique of blending a spherical aggregate of hollow resin spheres (JP-A-63-119411) has been reported.

However, cosmetics using these hollow resin spheres have improved the feeling of use and usability to some extent as compared with conventional ones, but they are not yet satisfactory enough, and further improvements have been desired. .

[Means for Solving the Problems] In view of such circumstances, the present inventors have conducted intensive studies and as a result, by mixing a specific hollow foamed resin sphere,
It was not obtained with the above hollow resin spheres, has good spreadability during use, has a soft feel, has no burden on the skin after makeup, has a good finished state, and has excellent caking phenomena. The present inventors have found that a cosmetic having characteristics can be obtained, and completed the present invention.

That is, according to the present invention, the volume is compressed to 70% or less by pressurization with an average particle size of 10 to 100 μm, an apparent specific gravity of 0.02 to 0.09, and 3 to 5 kg / cm ² , and the volume after depressurization is restored to 50% or more. It is intended to provide a compressed or wax-solidified solid cosmetic characterized by containing hollow foamed resin spheres.

In the present invention, the hollow foamed resin sphere is obtained by heating and expanding a thermoplastic resin sphere containing a volatile liquid foaming agent that evaporates by heating.

As the resin forming the outer shell of the hollow foamed resin sphere, methacrylates such as vinyl chloride, vinylidene chloride, and methyl methacrylate, acrylonitrile, styrene and the like, or homopolymers or the like are preferable, and volatile liquid foaming agents are particularly limited. However, butane, isobutane, isopentane, neopentane, neohexane, chlorofluorocarbons and the like are preferably used.

As disclosed in JP-B-59-53290, this hollow foamed resin sphere is a thermoplastic resin sphere containing a volatile liquid foaming agent, for example, a commercially available Expancel (manufactured by Expancel, Inc.). It is manufactured by a method of heating and foaming (trade name).

The hollow foamed resin sphere of the present invention is preferably obtained by sufficiently heating and foaming a thermoplastic resin sphere containing a volatile liquid foaming agent. The hollow foamed resin sphere of the present invention has an average particle size of 10
100100 μm is required, and particularly preferably 10-50 μm. If the average particle diameter is less than 10μ, the elastic properties of the target particles cannot be obtained, so that good spreadability and softness do not exhibit characteristics such as touch, and if it exceeds 100μ, a particle feeling is felt, which is not preferable. .

The apparent specific gravity of the hollow foamed resin sphere is preferably in the range of 0.02 to 0.09.

Furthermore, in order to further exert the above-mentioned effects of the present invention, the hollow foamed resin sphere of the present invention preferably has a resilience to a certain degree of returning to the original shape by releasing the pressure after the compression by the pressure. Hollow foamed resin spheres, unfoamed resin spheres and insufficiently foamed resin spheres are wetted with liquid paraffin,
A test was conducted to examine the volume change due to pressurization and depressurization. The results are as shown in FIG. 1 and 3-5 kg / cm
^{The one} which was compressed to a volume of 70% or less, preferably 60% or less by pressurization, and the volume of which was restored to 50% or more, preferably 80% or more after depressurization was good.

Specific examples of the solid cosmetics compressed or wax-solidified of the present invention include foundations, blushers, white powders, and eye shadows.

The spherical foamed resin composition for these cosmetics varies depending on the type of cosmetic, but is preferably 0.1 to 10% by weight. If the compounding amount is too large, the bulkiness after makeup and the powderiness of the cosmetic film may be felt, or in the case of solid powder makeup cosmetics, molding may be difficult, and if the amount is too small, sufficient No effect.

The production of the cosmetic of the present invention can be carried out by a production method known per se except that a hollow foamed resin sphere is used instead of the conventional powder for cosmetics, and the method is not particularly limited.

The cosmetics of the present invention further include ingredients commonly used in cosmetics, for example, powders for cosmetics such as coloring pigments, extender pigments, pearlescent agents, and organic powders; solid, semi-solid, and liquid oils; An agent, a polymer compound, a polyhydric alcohol, an alkali agent, an antioxidant, an ultraviolet absorber, a preservative, a fragrance, a cosmetic ingredient, water and the like can be appropriately compounded as required.

[Effects of the Invention] The cosmetic of the present invention is a hollow resin foam containing a thin hollow resin outer shell, which is light and soft and elastic,
It has an excellent feature that it has a soft touch, does not feel a burden on the skin after makeup, has a good finish, and has a very good spreadability due to its spherical shape. Furthermore, in the case of solid cosmetics, the cosmetic film at the time of use and after use is not powdery, has good caulking properties without causing a caking phenomenon, and has an oily cosmetic. Has excellent characteristics such that no oiliness is felt in the cosmetic film at the time of use and after use.

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

Examples 1 to 3 Solid oily foundation: The solid oily foundations of the present invention having the components shown in Table 1 and the solid oily foundations of Comparative Examples were produced by the following production methods, and the usability and usability were evaluated according to the following evaluation criteria. Table 1 shows the results.

<Production method> Components (1) to (4) are mixed, pulverized, and made uniform. This is previously added to the components (9) to (15) which have been mixed and dissolved by heating.
(8) Add each to mix and uniform. This was melt-filled in a container to obtain a solid oily foundation.

<Evaluation Criteria> ：: Very superior to Comparative Example 1 ：: Excellent than Comparative Example 1 △: Equal to Comparative Example 1 ×: Worse than Comparative Example 1 As shown in the evaluation results in Table 1, the product of the present invention (Example) 1-3) are softer at the time of rubbing with an applied body and at the time of application to the skin than the comparative products (Comparative Examples 2 to 4), have good spread and spread to the skin, and have an oil on the finished cosmetic film. No feeling of feeling or burden was felt, and it had excellent usability and usability.

Example 4 Solid powder foundation: The solid powder foundation of the present invention having the components shown in Table 2 and the solid powder foundation of the comparative example were produced by the following production method, and the usability and usability were the same as the evaluation criteria of Examples 1 to 3. Was evaluated. Table 2 shows the results.

<Production method> Components (1) to (7) are mixed, pulverized, and made uniform. The components (10) to (15) previously mixed and dissolved by heating are added thereto and mixed, and then the components (8) to (9) are added and mixed and made uniform. This was filled in a container and press-molded to obtain a solid powder foundation.

As can be seen from the evaluation results in Table 2, the product of the present invention (Example 4) has a softer feel when used and has better spread and spread to the skin, compared to the comparative product (Comparative Example 6). It did not make the skin feel a burden after makeup. In addition, the product of the present invention was easily removed to the coated body and did not cause a caking phenomenon.

Example 5 Stick-shaped lipstick: A stick-shaped lipstick was obtained from the following components by the following method.

(Ingredient) (% by weight) (1) Titanium oxide 3.0 (2) Color pigment 2.5 (3) Hollow foamed resin sphere ^* 1.0 (4) Selesin 10.0 (5) Dipentaerythritol fatty acid ester 5.0 (6) Diglycerin triiso Stearate 49.4 (7) Cetyl 2-ethylhexanoate 20.0 (8) Microcrystalline powder 9.0 (9) Fragrance 0.1 * Vinylidene chloride / methyl methacrylate copolymer: average particle size 50μ, apparent specific gravity 0.03 <Production method> Component (1) ) To (2) and the component (4) previously heated and dissolved
And (9) are mixed, uniformly dispersed with a three-roll mill, and then the component (3) is added and mixed. This is melt-filled in a container,
A stick-like lipstick was obtained by molding.

Example 6 Solid eye shadow: The following components were used to obtain a solid eye shadow by the following method.

(Ingredient) (% by weight) (1) Titanium mica 45.0 (2) Mica 29.9 (3) Talc 10.0 (4) Color pigment 4.0 (5) Hollow foamed resin sphere ^* 1.0 (6) Vaseline 2.5 (7) Squalane 5.0 (8) ) Dimethylpolysiloxane (20cs) 2.5 (9) Fragrance 0.1 * Vinylidene chloride / acrylonitrile copolymer: average particle size 40μ, apparent specific gravity 0.09 (Production method) Mix components (1) to (4), pulverize and homogenize . The components (6) to (9) previously mixed and dissolved by heating are added thereto and mixed, and then the component (5) is added to mix and homogenize. This was filled in a container and molded into a positive shape to obtain a solid eye shadow.

The cosmetics of the present invention of Examples 4 to 6 obtained as described above,
All had a soft touch when used, had good spread and spread to the skin, and had a good cosmetic finish.

[Brief description of the drawings]

FIG. 1 is a drawing showing changes in volume of various hollow resin spheres due to pressure.

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Itsuo Fukukura 48-18 Sakaemachi, Kita-ku, Tokyo Inside Kobayashi Kose Co., Ltd. (56) References JP-A-63-33318 (JP, A)

Claims (1)

(57) [Claims] (1) an average particle diameter of 10 to 100 μ, an apparent specific gravity of 0.02 to 0.0
9,3～5Kg / volume by the pressure of cm ² is compressed to less than 70% by compressed or wax volume after depressurization is characterized by containing a hollow foamed resin spheres to restore 50% Solidified solid cosmetic.