JPH07316017A - Lipstick overcoat - Google Patents

Abstract

PURPOSE:To provide a lipstick overcoat composed of a pasty outer phase compounded with a dimethylpolysiloxane incompatible with lipstick as an oil component and an inner phase containing water and silica powder and/or alumina powder. CONSTITUTION:This W/O-type lipstick overcoat is composed of an outer phase containing 40-70wt.% of a dimethylpolysiloxane of formula ((n) is 26-600) and an inner phase containing water and silica powder and/or alumina powder. A pasty overcoat can be produced by compounding the compound of formula as an oil component to the outer phase to improve the durability of the cosmetic effect of the lipstick, suppress the adhesion of the color to tableware, etc., and the bleeding of the color and give an easily usable lipstick. The lipstick coated with the overcoat is free from the problems of the extrusion of exclusively the perfluoropolyether in the case of pushing out the stick from a case or the separation of silica powder with time after the application of the coating to the lipstick to form white powder layer on the surface of the lipstick.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lipstick overcoat, and more particularly to a lipstick which is applied to a lipstick to improve the duration of the cosmetic effect of the lipstick and to prevent it from adhering to dishes. Regarding overcoats.

[0002]

2. Description of the Related Art Lipstick overcoats are provided as products for the purpose of maintaining the cosmetic effect of lipstick and improving the gloss.

Conventionally, as lipstick overcoats, a polymer compound such as a cellulose-based polymer compound, a vinyl-based resin, an acrylic resin or another polymer compound or methylphenyl polysiloxane has been blended with a water-based or alcohol-based polymer compound. There are known ones which utilize such characteristics as described above, and powdery or pressed ones containing a powder mixed with an oil as a main component (Japanese Patent Publication No. 61-12883 and Japanese Patent Laid-Open No. 61-12883).
24512).

However, conventional lipstick overcoats have not been sufficiently satisfactory to prevent the lipstick from adhering to dishes (color transfer). In addition, the powdery one has unevenness in the effect depending on the application method, and the one containing a polymer compound or the like is sticky at the time of use and there is a problem in terms of sensory aspects.

Therefore, there is a demand for a lipstick overcoat which can improve the durability of the makeup effect of the lipstick, suppress the color transfer of the lipstick, and is excellent in usability.

[0006] Further, there is also one in which powder of silica alumina or the like is dispersed in perfluoropolyether to aim at the effect of preventing secondary adhesion due to the oil repellency of perfluoropolyether (JP-A-5-221829). However, although this technology has the effect of improving the durability of the cosmetic effect, the effect of suppressing the color transfer of lipstick, and the effect of improving the usability, it is difficult to disperse the powder in perfluoropolyether, so it is easy to separate the two. , Therefore, even at room temperature, when the product is taken out of the tube, only the perfluoropolyether comes out, and even after application on the lipstick, the silica powder separates over time and the lipstick seems to be white. There is a problem that it will become a matte shape.

[0007]

DISCLOSURE OF THE INVENTION The present invention has a problem that the durability of the cosmetic effect, the suppression of color transfer of lipstick and the excellent usability, and that only perfluoropolyether comes out when the product is taken out from the tube. An object of the present invention is to provide a lipstick overcoat in which the silica powder does not separate with time even after being applied onto the lipstick, and the lipstick does not become white and do not wipe powder.

[0008]

A lipstick overcoat for solving the above-mentioned problems has an average n represented by Chemical Formula 1 in the outer phase.
= 26-600 dimethyl polysiloxane 40-70
The oil-in-water type lipstick overcoat is characterized by containing water and silica powder and / or alumina powder in the inner phase in an amount of wt%.

[0009]

[Chemical 2]

[0010]

In the present invention, since the silica powder and / or the alumina powder is contained in the internal phase, the fluid oil content of the lipstick can be solidified by the oil absorption of the powder after application, and the cosmetic effect can be maintained.

However, if the silica powder and / or the alumina powder is contained in the internal phase, whitening of the powder occurs,
Furthermore, the lipstick becomes matte. In order to prevent this, in the present invention, a paste-like form can be obtained by blending dimethylpolysiloxane, which is hard to be compatible with lipstick as an external phase, as an oil component, thereby improving the durability of the cosmetic effect of lipstick and It is possible to obtain a lipstick overcoat which suppresses adhesion to tableware and color bleeding and is easy to use.

[0012]

Embodiments Embodiments of the present invention will be described below for each constituent element.

A: (outer phase: oil) (dimethylpolysiloxane) The dimethylpolysiloxane has a general formula represented by the above chemical formula 1, and n = 2.
6 to 600.

The viscosity is preferably 20 cs to 1000 cs. Above all, the viscosity is preferably 100 to 500 cs from the viewpoint of spreadability and familiarity with the lips during use.

Specifically, KF96 manufactured by Shin-Etsu Silicone Co., Ltd.
A-20cs, 100cs, 300cs, 1000c
s, 5000cs, Toray Dow Corning Silicone SH200c-20cs, 50cs, 100cs, 2
00cs, 350cs, 500cs, 1000cs, 3
000cs and 5000cs correspond to this.

(Content) These oils are mixed in an amount of 40 to 70% by weight based on the total weight. 40 to 60% by weight is preferable because the effect is more prominent.

Further, an emulsifier is mixed in order to form a water-in-oil emulsion, and the emulsifier may be any general emulsifier that can be dispersed in silicone oil, for example, a general polyether. Modified silicone oil (more specifically, SH3746, SH3771C, SH27 of Toray Dow Corning Silicone Co., Ltd.
72C, SH3773C, SH3775C, SH364
8, SH3749, Shin-Etsu Chemical's SC9450, KF3
51, KF945A) and the like. These are used alone or in combination of two or more.

Further, in order to improve the stability against separation, an organically modified clay mineral, a hydrophobized powder or the like can be added. These can be appropriately blended within a range that does not impair the effects of the present invention.

B: (Internal Phase: Aqueous Phase) The silica powder and alumina powder contained in the aqueous phase of the internal phase may be those used in ordinary cosmetics, such as Syloid 55 (Fuji Devison Chemical Co., Ltd.). ), Erosir 200, 300, R-972, R974 (manufactured by Fuji Kasei Co., Ltd.), alumina AKS-G, AKP-30: A
KP-GM (manufactured by Sumitomo Chemical Co., Ltd.) and the like can be preferably used. These silica powder and alumina powder are
They can be used alone or in combination of two or more, and are preferably 0.5 to 10% by weight in the total composition, and 1 to 10% by weight.
Is more preferable, and 1 to 5% by weight is further preferable.

If it is less than 0.5% by weight, a remarkable effect cannot be obtained, and if it exceeds 10% by weight, it becomes difficult to apply it. 5% by weight
The following has the effect of improving the ease of application.

When considering the adsorption of the powder on the lipstick,
Silica powder having a hydrophobic surface represented by Aerosil R-972 and R974 is preferable. However, it is difficult to disperse these hydrophobic powders in water as they are. However, it can be easily dispersed in the aqueous phase by using a method in which it is first moistened with an appropriate amount of ethanol or a polyhydric alcohol, and then stirred and dispersed while adding water thereto. This method is also newly discovered by the present inventors.

The lipstick coat of the present invention may contain a water-soluble emulsifier in the aqueous phase for emulsification. Any water-soluble emulsifier may be used as long as it is generally used for cosmetics.

(Content of Water Phase) The water phase is 30 to 30% of the total weight.
It is preferably 60% by weight, and more preferably 40 to 60% by weight.

If the water phase is less than 30%, the amount of oil is large,
It is not desirable because the viscosity does not come out and the lip drops from the lips. An appropriate viscosity is obtained at 40% or more. Above 60%,
The oil does not form a continuous phase and cannot be w / o emulsified.

(Selective Ingredients, etc.) Also, the lipstick overcoat of the present invention takes the form of a paste with the above ingredients,
To improve the usability (easy to spread on lipstick and not to drip), it is possible to add thixotropic properties, and to reduce repellency, various water-swelling viscosity minerals and water-soluble polymers may be added to the aqueous phase. it can. Any of these thickeners may be used as long as they are generally used for cosmetics, and one kind or two or more kinds are used.

Further, in the present invention, in addition to the above essential components, components used in ordinary cosmetics, for example, cosmetic oils such as hydrocarbons, higher fatty acid esters, animal and vegetable oils and fats, surfactants, antioxidants, Fragrance, dye, alcohol, polyhydric alcohol, preservative, ultraviolet absorber, moisturizer,
Water or the like can be appropriately added within a range that does not impair the effects of the present invention.

[0027]

The present invention will be further described with reference to examples, but the present invention is not limited to these examples.

(Examples 1-6, Comparative Examples 1-3, 5, 6)
A lipstick overcoat having the composition shown in Table 1 was prepared by the following method.

Examples 1 to 6 Silica was wet-dispersed in ethanol. At this time, in each of Examples 4 and 5, the amount of silica added was 1% each (note that the remaining silica was dispersed in the oil phase, as described later). After that, water was added, and then water-swelling clay mineral was added, and the mixture was thoroughly stirred with a disper,
The water phase was used.

For the oil phase, polyether-modified silicone oil was added to dimethylpolysiloxane and sufficiently stirred with a disper. In addition, about Example 4 and Example 5,
The remaining silica was added and the above stirring was performed. While adding the above aqueous phase to this, stirring was continued with a disper to sufficiently emulsify.

Comparative Examples 1 and 2 Polyether-modified silicone oil was dispersed in oil, and water was gradually added to the oil while stirring to emulsify.

Comparative Example 3 Silica and a water-swellable clay mineral were wet-dispersed in ethanol, water was further added, and a water-swellable clay mineral was further added, followed by thorough stirring with a disper.

Comparative Examples 5 and 6 Lipstick overcoats were prepared in the same manner as in Example 1.

[0034]

[Table 1] 1 *: Appropriate amount (Comparative Example 4) A lipstick overcoat having the following formulation was produced by the following production method.

(Prescription) (% by weight) (1) Perfluoropolyether (FOMBLIN HC-25) 98.8 (2) Silica (Erosil 300) 1.0 (3) Red No. 202 0.1 (4) Perfume 0.1 (Production method) Components (2) to (4) were added to component (1) and mixed uniformly to produce a lipstick overcoat. Example 1
.About.6 and the lipstick overcoats of Comparative Examples 1 to 6 were evaluated by the following test methods for the effect of preventing color bleeding and the sustainability of the cosmetic effect and usability. The evaluation results are shown in Table 2.

(Test method) -Color transfer prevention effect: Lipstick was applied twice to the lips, and a lipstick overcoat was applied thereon. A glass plate was pressed there and the color shift was evaluated. A sample having an excellent color fringing preventing effect was evaluated as ◯, a sample having a slight effect was evaluated as Δ, and a sample having no effect was evaluated as x.

Persistence of makeup effect: Panelists were allowed to have a normal life, lipstick was applied on the lips, and a lipstick overcoat was applied on the lips, and the makeup lasting after half a day was evaluated. Those with excellent effects were evaluated as ◯, those with some effects were evaluated as Δ, and those without effects were evaluated as x. It should be noted that, as one of the makeup lastings, the evaluation also included so-called no bleeding, that is, the contour of the lipstick did not become blurred over time.

Usability: A lipstick was applied, and the lipstick overcoat of Examples or Comparative Examples was applied thereon, and the usability such as ease of application and uniformity of the cosmetic film was evaluated. A sample having good usability was evaluated as ◯, a sample having some problems but usable was evaluated as Δ, and a sample not usable at all was evaluated as x.

[0039]

[Table 2] : It was a little heavy. : Low viscosity, flipped by lipstick. : White powder floated on the separation and lipstick. : Not w / o and cannot be prepared. : The effect was not good because the viscosity was low and it fell down. As is clear from the results shown in Table 2, this example showed excellent results in terms of the color transfer prevention effect, the durability of the cosmetic effect, and the usability.

Further, the relationship between the content of dimethylpolysiloxane represented by the chemical formula 1 and various characteristics was investigated.

It can be seen that the content within the range of the present invention (Examples) is remarkably effective as compared with the content outside the range of the present invention (Comparative Examples 5 and 6).

Further, the relationship between the content of silica powder and / or alumina powder and various characteristics was examined using Samples 1 and 2.

[0043]

[Table 3] Samples 1 and 2 were evaluated in the same manner as in Table 2 above.

The results are shown in Table 4.

[0045]

[Table 4] The viscosity of the aqueous phase became high and the emulsification was not possible. Not prepared. From the results of Table 4, the content of the silica powder and / or the alumina powder is less than 0.5% by weight, the content of 0.5% by weight to
The effect is slightly reduced when compared with 10% by weight, but Comparative Example 1
It was found that the effect was improved from ~ 6.

[0046]

EFFECTS OF THE INVENTION According to the present invention, the durability of the cosmetic effect, the suppression of color transfer of lipstick, the excellent usability, and the problem that only perfluoropolyether comes out when the tube is taken out, and lipstick It is possible to provide a lipstick overcoat in which the silica powder is not separated over time even after being applied onto the lipstick and the lipstick is white and does not wipe the powder.

Claims (2)

[Claims] 1. An average n = 26 to 6 shown in Chemical Formula 1 in the outer phase.
A water-in-oil type lipstick overcoat containing 40 to 70% by weight of dimethylpolysiloxane of No. 00 and water and silica powder and / or alumina powder in the internal phase. [Chemical 1] 2. A lipstick overcoat, characterized in that the content of silica powder and / or alumina powder is 0.5 to 10% by weight.