JP3406633B2 - Foam aerosol cosmetics - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foamy aerosol cosmetic, and more particularly, it can prevent unpleasant feelings such as stickiness, shining, and makeup loss on the skin. The present invention relates to a foam aerosol cosmetic. 2. Description of the Related Art
In order to prevent stickiness and oiliness on the skin, so-called powder-containing cosmetics such as water-white powder and calamine lotion containing an astringent or inorganic powder have been developed. [0003] However, in the case of powder-containing cosmetics, a good feel on the skin cannot be obtained only by blending the above-mentioned astringent. Is not desirable as a commercial form because of the difficulty of coagulation and re-dispersion. The surface of the inorganic powder is hydrophilic, so that it loses its oil treatment ability (oil absorption ability) and has a squeaky and sticky feeling on the skin. Satisfactory results have not yet been obtained. Furthermore, even when a resin having generally high oil absorption capacity is blended, it is difficult to stably blend it in an aqueous system, and even when a resin that can be dispersed well is used, the obtained powder-containing cosmetics Many do not provide good feel. [0004] Further, these powder-containing cosmetics have a drawback such that they are easy to drip when picked up due to an uneven system. Therefore, development of a powder-containing cosmetic which has good dispersibility of powder, has excellent oil treatment ability, and provides a good feeling of use has been desired. Means for Solving the Problems The inventors of the present invention have conducted intensive studies in view of such circumstances, and as a result, an aqueous dispersion of a powder in which a resin surface is covered with an inorganic substance shows good dispersibility, and The present inventors have found that stickiness and shine on the skin do not occur, and that dripping becomes difficult due to foaming, and the present invention has been completed. That is, according to the present invention, an average particle diameter of 0.01 to 500 μm is obtained by coating the surface of a resin particle with an inorganic powder.
A foam aerosol cosmetic other than a deodorant, characterized in that an undiluted solution prepared by dispersing a composite powder of 0.1 to 50% by weight in an aqueous medium of 50 to 99% by weight is filled in an aerosol can together with a propellant. Is what you do. In the present invention, the resins preferably used include, for example, those shown in the following (a) to (i). (A) "Trefill E-500", "Trefill E-501" (from Toray Dow Silicone Co., Ltd.)
Dimethylpolysiloxane polymer. (B) An acrylate copolymer having structural units represented by the following general formulas (1) and (2). [0009] A particularly preferred example of the acrylate copolymer is "POLYTRAP" (manufactured by Dow Corning). (C) A porous vinyl-based polymer obtained by polymerizing one or more vinyl-based monomers having a solubility parameter of 7 to 10 and further making the polymer porous. Specific examples include those described in JP-A-63-316715. (D) Polymethylsesquioxane having an intermediate structure between inorganic and organic in which one methyl group is bonded to a silicon atom in a network structure in which a siloxane bond extends three-dimensionally. Particularly preferred examples of polymethyl sesquioxane include “Tospearl 240”, “Tospearl 120”, and “Tospearl 13”.
0 "and" Tospearl 140 "(all manufactured by Toshiba Silicone Co., Ltd.). (E) Polymethyl methacrylate such as "Microsphere M", "Microsphere M-100", "Microsphere M-300", "Microsphere M-400" (all manufactured by Matsumoto Yushi Co., Ltd.). (F) Nylon powder such as "SP-500" (manufactured by Toray Industries, Inc.). (G) Crosslinked polystyrene powder such as “Fine Pearl SP-3000” (manufactured by Sumitomo Chemical Co., Ltd.). (H) Polyethylene powder such as "Floppys CL-4080F" (manufactured by Iron and Steel Chemical Co., Ltd.). (I) Lauroyl lysine such as "Amihope LL" (manufactured by Ajinomoto Co.). The average particle size of these resin particles is 0.01 to 5
00 μm is preferred. The inorganic substance used in the present invention is preferably an inorganic powder such as a metal oxide or a clay mineral which is usually used in cosmetics, quasi-drugs, topical medicines and the like. (A) to (h). (A) Zinc oxide: As specific examples, “fine zinc white” (0.26 μ), “SF-15” (0.18 μm)
μ), “Finex-25” (0.04 μ), “Finex-25”
ex-50 "(0.02μ) (all manufactured by Sakai Chemical Industry Co., Ltd.)
And the like. Further, as the fine zinc oxide,
No. 175,921, and flaky zinc oxide described in JP-A-1-175921 are exemplified. (B) Talc: Specific examples include "Talc SW" and "Talc JA-46R" (all manufactured by Asada Flour Milling Co., Ltd.). (C) Titanium oxide: As a specific example, "MT-500
B "and" MT-600B "(manufactured by Teikoku Chemical Industries, Ltd.).
No. 11 (eg, "Taipek" (manufactured by Ishihara Sangyo Co., Ltd.)) and the like. (D) Sericite: A specific example is “Eight Pearl 30
0S "(manufactured by Kakuhachi Fish Foil Co., Ltd.) and the like. (E) Silica: As specific examples, “Silica microbead P-400” and “Silica microbead P-1500”
(These are manufactured by Catalytic Chemical Industry Co., Ltd.), "Esquartz M-1"
(Manufactured by Nippon Steel Chemical Co., Ltd.) and "Sildex H-31" (manufactured by Asahi Glass Co., Ltd.). (F) Iron oxide. (G) Zirconium oxide. (H) Aluminum oxide. The inorganic powder particles have an average particle size of 0.01 to
500 μm is preferred. In order to coat the surface of the resin particles with the inorganic powder particles, for example, various ball mills, ong mills, screen mills, pot mills, mortars, attritors, hybridizers (mixers using a high-speed impact in a gas stream (" Journal of the Engineering Society, Vol. 24, No. 9, pages 25-31, 1987
Year), specific example; "NHS-1" (manufactured by Nara Machinery)
It is sufficient to charge the resin particles and the inorganic powder particles which have been sufficiently mixed beforehand, and then perform the coating treatment. The peripheral speed during the coating process is 20
The coating treatment time is preferably 1 to 30 minutes. It is preferable that the surface of the resin particles is completely covered. In addition, the degree of coating can be observed with an electron microscope, and an optimum coating state according to the purpose can be determined. The mixing ratio between the resin particles and the inorganic powder particles is as follows:
It is preferable that the inorganic powder particles be 0.5 to 1000% by weight (hereinafter, simply referred to as%) with respect to the resin particles.
More preferably, it is 500%. The average particle diameter of the particles obtained by coating the surface of the resin particles thus obtained with an inorganic substance (hereinafter sometimes referred to as composite powder) is preferably 0.01 to 500 μm, and 0.02 to 500 μm.
100 μm is more preferred. It is preferable that these composite powders are blended in an amount of 0.1 to 50%, particularly 1 to 25% in the whole composition. Examples of the aqueous medium used in the present invention include water and mixtures of water with monohydric alcohols such as methanol, ethanol and isopropanol, and glycerin. These aqueous media comprise 50-99 in the total composition.
%, Particularly preferably 70 to 99%. The foamed aerosol cosmetic of the present invention can be produced by filling a pressure-resistant container with a stock solution obtained by dispersing the above composite powder in an aqueous medium and a propellant according to a conventional method. As the propellant used here, for example, a chlorofluorocarbon gas such as trichloromonofluoromethane and dichlorodifluoromethane can be used, but liquefied petroleum gas (LPG),
Dimethyl ether (DME), isopentane and the like are preferred. These propellants comprise 1 to 30%, in particular 5 to 30% of the total composition.
It is preferable to mix it by 20%. Further, it is preferable to perform the adjustment filling so that the internal pressure of the aerosol can after filling becomes 1.5 to 5 kg / cm ² G. The foamy aerosol cosmetic composition of the present invention may further comprise, in addition to the above-mentioned composite powder, other powder having the same average particle size,
For example, mica, talc, sericite, kaolin, zinc oxide, nylon powder, silicone powder such as polymethylsilsesquioxane, acrylate copolymer, polyethylene powder, polyester powder, polystyrene powder, epoxy powder and the like can be used in combination. . Further, the foamed aerosol cosmetic of the present invention may further contain, in addition to the above essential components, an anti-inflammatory agent, an antioxidant, an antiseptic, an ultraviolet absorber, a fragrance, etc. as long as the effects of the present invention are not impaired. Ingredients usually blended in cosmetics can be blended. The foamed aerosol cosmetic of the present invention is excellent in the effect of preventing stickiness, shininess and makeup loss due to sebum, and the effect lasts for a relatively long time. is there. Moreover, since it is foamy, it is difficult for the liquid to drip when it is picked up by hand. EXAMPLES The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples. Production Examples 1 to 5 After the resin particles and the inorganic powder particles shown in Table 1 were sufficiently mixed, they were charged into the production apparatus shown in Table 1, and composite powders were produced under the production conditions shown in Table 1. (Production Examples 1 to 5). [Table 1] Observation with an electron microscope confirmed that the surface of each of the obtained composite powders was completely covered with the inorganic powder. Examples 1 to 5 and Comparative Examples 1 and 2 Foamed aerosol cosmetics having the compositions shown in Table 3 were produced according to a conventional method. For each of the obtained samples, redispersibility and feeling of use (stickiness, creaking, makeup loss, etc.) were evaluated according to the following criteria. In addition, about the feeling of use, the average value of what was sensory-evaluated by ten expert panelists was adopted.
Table 3 also shows the evaluation results. (Evaluation Criteria) (1) Redispersibility of powder: ○: powder is uniformly dispersed when container is shaken several times Δ; powder is dispersed even if container is shaken several times Partially agglomerated x; powder is agglomerated even after shaking the container several times. (2) Sticky feeling: ；: non-sticky when applied to skin △; slightly sticky when applied to skin x; when applied to skin Sticky (3) Squeaky feeling: ○: Does not squeak when applied to skin. △; Slightly squeaks when applied to skin ×; Squeezes when applied to skin. (4) Makeup loss: (Normal after applying makeup to face Feel when half-day work was performed) ○: no makeup loss Δ: makeup loss slightly ×; makeup loss present [Table 3] As shown in Table 3, the products of the present invention (Examples 1 to 3)
5) is better in powder redispersibility and feeling in use than powder using only dimethylpolysiloxane polymer particles (Comparative Example 1) and powder using only zinc oxide particles (Comparative Example 2). It turns out to be much better.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-183208 (JP, A) JP-A-5-39209 (JP, A) JP-A-62-135411 (JP, A) JP-A 62-135411 56415 (JP, A) JP-A-61-217169 (JP, A) JP-A-61-194010 (JP, A) JP-A-2-137715 (JP, A) JP-A-63-185911 (JP, A) JP-A-55-29524 (JP, A) JP-A-2-62816 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61K ^7/ 00-7/50

Claims (1)

(57) [Claims 1] A composite powder having an average particle diameter of 0.01 to 500 μm, which is formed by coating the surface of a resin particle with an inorganic powder, is 0.1 to 0.1 μm.
A foam-like aerosol cosmetic other than a deodorant, characterized in that a stock solution in which 50% by weight of 50 to 99% by weight of an aqueous medium is dispersed is filled in an aerosol can together with a propellant.