JP3288765B2 - Aqueous powdered cosmetics - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous powder-containing cosmetic containing a silicone surface-treated powder, and more particularly, to an aqueous powder containing excellent dispersibility of the powder and excellent quality stability. Related to cosmetics.

[0002]

2. Description of the Related Art Conventionally, cosmetics containing powders include:
Light white powder, calamine lotion and the like are well known.
In these, the powder layer precipitates and separates at the time of standing, and is shaken at the time of use to be used uniformly. The type of powder and the composition of the aqueous layer of this type of cosmetics that are common in dosage form are various. The main purpose of compounding the powder is also various. For example, in the case of cosmetics for makeup, coloring or shielding by a white or colored pigment or a carrier holding the pigment on the surface, in the toiletry field, antiperspirant, etc. The purpose of calamine lotion is to have a physiological effect called light astringent action.

On the other hand, a common feature is that the product is required to have a refreshing feeling. That is, the white powder contains a large amount of water and alcohol, and is suitable as a summer cosmetic because of a refreshing sensation at the time of use and a refreshing sensation. Refreshing agents are preferred. Even calamine lotion is formulated with cool camphor and used for summer sunburn. In general, the light touch and lubricity obtained by blending the powder also have the effect of enhancing the refreshing feeling.

However, the powder does not always work well on the touch surface. It is a well-known problem that a thick coat or wet with water or sweat significantly impairs the feel.

[0005] To deal with such problems, siliconized powders having good spreadability, dry feel, and resistance to water and sweat are used today. For example,
1-9890, JP-B-45-2915, JP-B-45-18999, JP-B-49-1769, JP-A-56-16404, JP-A-55-1
No. 36213, JP-A-56-29512, JP-A-61-103814, and the like. However, most of them are applied to emulsified or oily cosmetics, and there is almost no example of mixing such powders in aqueous cosmetics.
No. 814.

[0006] One reason that silicone-treated powders have not been used so much in aqueous cosmetics that require a refreshing feeling more than emulsified or oily cosmetics is that they are difficult to formulate. It is also conceivable that the formulation stability is not sufficient. Furthermore, in the first place, aqueous two-layer cosmetics containing powders, not only silicone-treated powders, have poor dispersion at the time of use and must be vigorously shaken. This is not improved,
Rather, they tended to worsen. The siliconized powder has good dispersibility of the powder itself, but seems to have poor dispersibility in the aqueous layer either because of water repellency.

Japanese Patent Application Laid-Open No. Sho 61-103814 relates to a cosmetic prepared by treating a powder with an oil agent such as silicone in a specific ratio and dispersing the powder in an aqueous system. Cosmetics obtained as prepared, after storage for a long time, powder floating may be slightly observed on the liquid surface, and when re-dispersing the precipitated powder in many cases,
It had to be shaken quite vigorously.

[0008]

As described above, the properties provided by the silicone-treated powder are required only for an aqueous composition, but are difficult to mix due to the essential problem of water repellency, product instability, Due to the complexity of use, it could not be used for aqueous compositions.

[0009]

Means for Solving the Problems In view of the above circumstances, the present inventors have made intensive studies and found that the addition of a polyether-modified silicone having a molecular weight of 3500 or less makes it possible to disperse the silicone surface-treated powder in water. Was found to be significantly increased, and the present invention was completed.

That is, the present invention provides the following components (a) and (b)
And (c) (a) 0.01 to 40% by weight of a silicone surface-treated powder, (b) 0.01 to 60% by weight of a polyether-modified silicone having a molecular weight of 3500 or less, and (c) 10 to 99.8% by weight of water. It is intended to provide a two-layered powder layer / water layer type cosmetic composition.

The silicone in the silicone surface-treated powder of the component (a) used in the present invention may have a dimethylpolysiloxane structure (a) or a methylphenylpolysiloxane structure (b) in the molecule.

[0012]

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[0013] Any compound having the formula: Silicones that can be used for surface treatment of cosmetic powders include:
Examples thereof include methyl hydrogen polysiloxane, dimethyl polysiloxane, methyl phenyl polysiloxane, cyclic dimethyl polysiloxane, and alkyl-modified dimethyl polysiloxane. Further, a powder on which the above compound is formed by a reaction on the powder can also be used as the component (a).

The powder to be treated with silicone is not particularly limited as long as it is generally used as a powder for cosmetics. For example, silicic acid, silicic anhydride, magnesium silicate, talc, sericite, Mica, kaolin, bengala, clay, bentonite, titanium-coated mica, bismuth oxychloride, zirconium oxide, magnesium oxide, zinc oxide, titanium oxide, aluminum oxide, calcium sulfate, barium sulfate, magnesium sulfate, calcium carbonate, magnesium carbonate, oxidation Inorganic powders such as iron, ultramarine, chromium oxide, chromium hydroxide, calamine, carbon black, and composites thereof; polyamides such as nylon;
Polyester, polyethylene, polypropylene, polystyrene, polyurethane, vinyl resin, urea resin, phenol resin, fluororesin, silicon resin, acrylic resin, melamine resin, epoxy resin, polycarbonate resin, divinylbenzene / styrene copolymer, cellulose, chitin, chitosan And water-insoluble proteins such as silk powder and keratin; organic powders such as CI Pigment Yellow and CI Pigment Orange; and complexes of these inorganic powders and organic powders. These powders are used alone or in combination of two or more. The shape of the powder is not particularly limited, and a flat, massive, scaly, or spherical powder can be used regardless of the presence or absence of pores, but a flat or spherical powder is particularly preferable. The primary particle diameter of the powder is not particularly limited as long as the outer shape of the powder is kept, but it is preferably 0.01 to 80 μm, particularly preferably 0.01 to 20 μm from the viewpoint of feeling of use.

The silicone surface-treated powder can be used alone or in combination of two or more, and is incorporated in the cosmetic of the present invention in an amount of 0.01 to 40% by weight, preferably 0.1 to 30% by weight. You.

The polyether-modified silicone of the component (b) used in the present invention has a molecular weight of 3500.
Although it is the following, 1600 or less, especially 1100 or less is preferable. Further, the HLB value of the polyether-modified silicone is preferably 5 to 17. Here, the HLB value is a cloudiness number A (0.5 g of an anhydrous sample was dissolved in 5 ml of 98% ethyl alcohol, kept at a constant temperature of 25 ° C., and titrated with a 2% aqueous phenol solution while stirring. (ml number) using the following formula. HLB = cloud number A × 0.89 + 1.11

As such a polyether-modified silicone, for example, a linear or cyclic polyether-modified silicone represented by the following formula (1) is preferable.

[0018]

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Wherein R ₁ may be the same or different;
Each represents a methyl group or a phenyl group, p represents a number of 0 to 9 on average, q represents a number of 1 to 5 on average, r represents 0 or 1, X ₁ , X ₂ and X ₃ represent May be the same or different, respectively a methyl group, a phenyl group or a group R ₂ (OC ₃ H ₆ )
_{b (OC 2 H 4) a} O (CH 2) c - (R 2 is a hydrogen atom, a group C _n H _{2n +1} - the number of or the radical _{C n H 2n + 1 -CO- (} n is 1-3 A) is an average number of 0 to 16, b is an average value of 0 to 12,
c shows the number of 1-6. Where a + b ≧ 1)
Alternatively, X ₁ and X ₃ may together form a single bond.
However, any one of X ₁ , X ₂ and X ₃ is a group R ₂ (O
_{C 3 H 6) b (OC} 2 H 4) a O (CH 2) c - a. ]

Among them, particularly preferred polyether-modified silicones include those represented by the following formulas A to D.

[0021]

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Wherein p, q, a, b, c and R ₂ are the same as above.

These polyether-modified silicones are
They can be used alone or in combination of two or more, and are incorporated in the aqueous composition of the present invention in an amount of 0.01 to 60% by weight, preferably 0.1 to 30% by weight.

The water content of the component (c) in the aqueous composition of the present invention is 85 to 99.8 unless other additives are considered.
However, considering the addition of alcohols and the like in practical preparations, it is 10 to 99.8% by weight, preferably 3% by weight.
0-99.8% by weight is suitable.

Here, the alcohols include monohydric alkanols such as ethanol; propylene glycol;
Polyhydric alcohols such as 3-butanediol and glycerin;
Sugar alcohols such as sorbitol and xylitol; polyethylene glycols; and polyethylene glycol ethers such as diethylene glycol monoethyl ether and polyethylene glycol monoglucoside.

The aqueous composition of the present invention may further contain other surfactants which are generally used in cosmetics, pharmaceuticals and the like. Such other surfactants may be any of nonionic surfactants and ionic surfactants. Examples of nonionic surfactants include sorbitan fatty acid esters such as sorbitan monolaurate and glycerin fatty acids such as glycerol monooleate. Esters, sucrose fatty acid esters such as sucrose monolaurate,
Polyoxyethylene alkyl ether such as polyoxyethylene lauryl ether, polyoxyethylene polyoxypropylene glycol, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester, alkyl alkanolamide, sugar ether, sugar amide and the like. As the surfactant, fatty acid soaps such as potassium laurate, alkyl ether carboxylate such as sodium lauryl ether carboxylate,
Alkyl sulfates such as sodium lauryl sulfate, polyoxyethylene alkyl ether sulfates, alkyl phosphates such as monolauryl phosphate sodium salt, lauroyl-N
N-acylamino acid-based activators such as sodium methyltaurine, sodium N-lauroyl-L-glutamate, sulfosuccinic acid activators, imidazoline activators commercially available as Milanol and softazoline, betaine such as lauryldimethylaminoacetate betaine Activators, amine oxides and the like.

The cosmetic of the present invention may further comprise, if necessary,
Liquid oils and fatty acids, as well as medicinal agents, moisturizing components, bactericides, preservatives, ultraviolet absorbers, antioxidants, thickeners, pigments, fragrances, etc. which are commonly used in cosmetics, pharmaceuticals, etc. can be blended. . However, the incorporation of an unlimited amount of an oily component may result in an emulsified system, which may reduce the refreshing sensation. Therefore, it is preferable to limit the amount of the oily component to a range suitable for an aqueous cosmetic.

The dosage form of the cosmetic according to the present invention is typically a powder layer / water layer two-layer type in which powder is precipitated in a transparent aqueous liquid. The powder can be easily and uniformly dispersed by shaking lightly at the time of use. In addition, when the powder is best dispersed, the powder is substantially always uniformly dispersed, and such a dosage form is also included in the cosmetic of the present invention.

The emulsifying system in which the oil layer and the powder have some contact is not in principle applicable to the present invention. However, completely apart from the behavior of the powder, a slight amount of a fragrance or the like is emulsified into the aqueous layer. In the present invention, the case where the particles are uniformly dispersed is included in the present invention.

In order to obtain these preparations, all raw materials may be mixed according to a conventional method. Depending on the nature of the raw materials to be blended, it may be necessary to heat or melt it or dissolve it, but there is no need to consider the procedure or the charging speed when blending the powder.

The present invention provides a skin care product such as a lotion, a lotion for shaving, a lotion for acne, etc .; Detergents, facial cleansers, body shampoos, etc .; makeup cosmetics, such as water white powder and eyeshadow; antiperspirants,
It is preferably applied to deodorants such as colognes or fragrances.

[0032]

The aqueous powder-containing cosmetic of the present invention is excellent in dispersibility of the silicone-treated powder, so that it is not necessary to shake vigorously at the time of use, and the powder can be easily dispersed only by shaking lightly. Its good dispersibility was not obtained with conventional silicone untreated powders. This allows
It is easy to mix the silicone surface-treated powder into the aqueous cosmetic, and the silicone surface-treated powder has good spreadability,
Preferred properties such as a light touch, strong against water and sweat,
Obtained with aqueous cosmetics.

[0033]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. In addition,
In the following examples, powders treated with a conventional method using methyl hydrogen polysiloxane were used. Example 1 A composition in which a siliconized powder was dispersed in water was prepared.
Its performance was evaluated. The results are shown in Table 1. (Evaluation method) Take 9.9 g of ion-exchanged water in a sample bottle with a cap having a capacity of 20 ml, add 0.05 g of a 10% aqueous solution of various surfactants, and further add 0.05 g of silicone-treated talc or untreated talc. After shaking, the mixture was allowed to stand, and the appearance was visually observed. After one hour, the mixture was shaken lightly again to observe redispersibility. In addition, it was applied to the back of the hand of one experienced panelist, air-dried, and the feel was determined. (Evaluation criteria) Dispersibility ：: All dispersed uniformly ：: Almost dispersed, but partly floated on the water surface ×: Redispersibility not dispersed at all or mostly not dispersed ：: Dispersed uniformly all △ : Partially dispersed, but not partially dispersed ×: Feel almost non-dispersed ○: Smooth feel , not remarkable powdery feeling Δ: Not uncomfortable but no smooth feel × : Sticky, powdery unpleasant feel

[0034]

[Table 1]

[0035]

* 1: General formula A, molecular weight 600, HLB12 (manufactured by Nippon Unicar) * 2: General formula A, molecular weight 900, HLB13 (manufactured by Shin-Etsu Chemical Co., Ltd.) * 3: General formula A, molecular weight 1100, HLB10 * 4: General formula A, molecular weight 3600, HLB13 (manufactured by Nippon Unicar) * 5: General formula A, molecular weight 12000, HLB8 (manufactured by Shin-Etsu Chemical) * 6: Triethanolamine laurate * 7: Polyoxyethylene (8) lauryl ether

Example 2 Lotion

Table 3 Silicone-treated talc 3.0 (% by weight) Polyether-modified silicone a ^{* 1} 0.5 Citric acid 0.1 Zinc paraphenolsulfonate 0.2 Propylene glycol 4.0 1,3-butylene glycol 1. 0 Ethanol 12.0 Polyoxyethylene (15) oleyl ether 0.6 Preservatives Appropriate amount Perfume Appropriate amount Purified water Balance 100.0 * 1: Same as in Example 1. This lotion has the same composition as the silicone-treated powder and silicone activity. Except for the agent, there was a dry feel that was not found in a lotion balanced with purified water, and the usability was good.

Example 3 Shaving

TABLE 4 Silicone surface-treated nylon powder 4.0 (% by weight) Polyether-modified silicone c ^{* 1} 1.0 Polyoxyethylene (40) hydrogenated castor oil 0.5 Sodium isostearyl lactate 0.3 Dipotassium glycyrrhizinate 0.02 1-Menthol 0.08 Ethanol 50.0 Coloring agent Trace amount Perfume Trace amount purified water Balance 100.0 * 1: Same as in Example 1.

Example 4 Cologne

[Table 5] Silicone surface-treated talc 2.0 (wt%) Polyether-modified silicone c ^{* 1} 0.5 Polyoxyethylene (40) hardened castor oil 0.3 Ethanol 50.0 Colorant Trace amount of fragrance 5.0 Purified water Balance 100.0 * 1: Same as in Example 1. This cologne had a refreshing feel, good scent persistence, and no deterioration in scent after long-term storage.

Example 5 Water White Powder

TABLE 6 Silicone surface treated titanium oxide 3.0 (% by weight) Silicone surface treated zinc oxide 2.0 Silicone surface treated talc 8.0 Silicone surface treated mica 1.5 Silicone surface treated pigment 0.5 Polyether modified silicone c ^{* 1} 2.5 Polyoxyethylene (20) hydrogenated castor oil 0.1 Anhydrous silica 0.2 Glycerin 7.0 Ethanol 10.0 Sodium chloride 0.5 Fragrance Micro- purified water Balance 100.0 * 1: Same as Example 1 This water-white powder had a cool feeling of use and a smooth feel after drying, and was strong against water and sweat.

Example 6 Eye shadow

Table 7 Silicone surface-treated titanium oxide 5.0 (% by weight) Silicone surface-treated zinc oxide 0.5 Silicone surface-treated talc 5.0 Silicone surface-treated mica 7.5 Silicone surface-treated nylon powder 1.0 Silicone surface-treated pigment 0.5 Polyether modified silicone c ^{* 1} 2.5 Squalane 0.2 Anhydrous silica 0.2 Glycerin 5.0 Sodium chloride 0.5 Fragrance Micro- purified water Balance 100.0 * 1: Same as in Example 1.

Example 7 Water White Powder

Table 8 Silicone surface-treated titanium oxide 3.0 (% by weight) Silicone surface-treated talc 5.0 Silicone surface-treated mica 1.5 Silicone surface-treated pigment 0.5 Polyether-modified silicone b ^{* 1} 2.5 Dimethyl silicone ( 100cs) 0.2 Polyoxyethylene (20) hydrogenated castor oil 0.1 Anhydrous silica 0.2 Glycerin 7.0 Ethanol 10.0 Sodium chloride 0.5 Fragrance Micro- purified water Balance 100.0 * 1: Same as in Example 1. This water-white powder had a cool feeling of use and a smooth feel after drying, and was strong against water and sweat.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI A61K 7/15 A61K 7/15 7/32 7/32 7/46 7/46 A (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61K ^7/ 00-7/50

Claims (1)

(57) [Claims] 1. The following components (a), (b) and (c): (a) 0.01 to 40% by weight of a silicone surface-treated powder; and (b) 0.01 to 60% of a polyether-modified silicone having a molecular weight of 3500 or less. (C) Powder layer / water layer containing 10 to 99.8% by weight of water
Two-layer cosmetics.