JPH0717828A - Oil in water type solid cosmetic - Google Patents

Abstract

PURPOSE:To provide an oil in water type solid cosmetic excellent in usability and portability and remarkably excellent in refreshing feeling in use, affinity to the skin, natural finish and moisture retention. CONSTITUTION:There are provided an oil in water type solid cosmetic containing (a) a water-soluble solidification agent selected from agar-agar and gelatin, (b) an oily agent and (c) water, another oil in water type solid cosmetic containing (d) a powder in addition to the above-mentioned components and its forming method of the oil in water type solid cosmetic carried out by charging the oil in water type solid cosmetic into a vessel, making a hydratable sheet-shaped material to adhere to the surface of the cosmetic before solidification and removing it after cooling and solidification. According to this invented forming method, the inner structure of the cosmetic is exposed since the cosmetic surface exhibits a discontinuous phase. It is, therefore, easy to charge the cosmetic to an applicator. Consequently the obtained oil in water type solid cosmetic is excellent in usability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil-in-water type solid cosmetic composition, and more specifically, it has a fresh feel, an affinity for skin, a natural finish, and a moisturizing property. , An oil-in-water type solid cosmetic having excellent portability.

[0002]

2. Description of the Related Art Conventionally, water-in-oil type solid-type cosmetics have been known as water-containing solid type cosmetics. Although it has excellent treatment properties, it has the drawbacks of lacking freshness and refreshing feeling, stickiness and greasiness, and lack of fit to the skin.

On the other hand, the oil-in-water type cosmetics have been highly evaluated for their wet feeling, fit to the skin, and the naturalness of the finish. Since it is a liquid to a cream, the container form is mostly a bottle or tube sealed with a cap, which is inconvenient in terms of usability and portability.

[0004]

Therefore, it has excellent cosmetic properties peculiar to the oil-in-water type and is excellent in usability and portability.
The development of a solid cosmetic that can be compactly stored has been eagerly awaited.

[0005]

In view of the above circumstances, the present inventors have conducted intensive studies and as a result, have found that a specific water-soluble solidifying agent,
The present invention has been completed based on the finding that a cosmetic which is obtained by combining an oil agent and water and solidified has both the cosmetic properties of an oil-in-water cosmetic and the usability and portability.

That is, the present invention comprises the following components (a)-
(C) (a) Water-soluble solidifying agent selected from agar and gelatin (b) Oil agent (c) Water is contained, and an oil-in-water solid cosmetic composition is provided.

The water-soluble solidifying agent of the component (a) used in the present invention solidifies an oil-in-water cosmetic composition and imparts a hardness that can withstand usability and portability. This (a) component is
It is selected from agar and gelatin, and its origin, origin, etc. are not particularly problematic, but agar is preferable from the viewpoint of feeling in use and the like.

This component (a) contains 0.1 to 1 in the total composition.
0% by weight (hereinafter simply referred to as "%"), particularly 0.3 to 7
It is preferable to blend in the range of%. When the content of the component (a) is 0.1% or less, the hardness as a solid cosmetic cannot be obtained, and when it is 10% or more, it becomes too hard and the water feel is impaired and the elongation is poor. This may cause problems such as not obtaining a uniform makeup finish.

Further, the oil agent as the component (b) is not particularly limited, and various solid, semi-solid and liquid vegetable oils, animal oils, mineral oils and synthetic oils which are usually used in cosmetics can be used. Specific examples of the oil agent include fats and oils such as olive oil, jojoba oil, mink oil and the like; waxes such as beeswax and candelilla wax; hydrocarbons such as liquid paraffin, microcrystalline wax and vaseline; stearic acid, oleic acid and the like. Fatty acids; higher alcohols such as cetanol; esters such as isopropyl myristate; lanolin derivatives such as lanolin fatty acid isopropyl and lanolin alcohol; starch fatty acid esters; methylpolysiloxane, methylphenylpolysiloxane, dimethylpolysiloxane having a three-dimensional crosslinked structure Examples thereof include silicone compounds such as polymers.

These oil agents can be used alone or in combination of two or more kinds, and the total composition is about 0.5 to 30%,
It is particularly preferable to add 1 to 20%. When the content of the component (b) is 0.5% or less, the feeling of adhesion to the skin and the water resistance of the finished film are lacking, and when it is 30% or more, oilyness and stickiness occur, and the intended water usage is desired. It may cause a problem such as not feeling.

Further, the water as the component (c) is 40% in the total composition.
˜95%, especially 50-80% is preferable.

When the oil-in-water cosmetic of the present invention is used as a cosmetic such as a foundation or an eye shadow, it is necessary to add a powder in addition to the above essential components.

The powders that can be added to the cosmetics of the present invention include:
There is no particular limitation, generally used cosmetic powder,
For example, titanium oxide, talc, mica, kaolin, magnesium carbonate, calcium carbonate, aluminum silicate,
Magnesium silicate, calcium silicate, zinc oxide, red iron oxide, yellow iron oxide, black iron oxide, Gunjou, konjac, tar pigments, natural pigments, titanium mica, iron oxide mica titanium, bismuth oxychloride, nylon powder, silk powder, etc. Available.

Further, as these powders, powders which have been subjected to a hydrophobic treatment for imparting water repellency may be used. Examples of the substance used for the hydrophobic treatment include fluorine compounds, silicone oils, metal soaps, waxes,
Examples thereof include fats and oils, hydrocarbons and the like.

The blending amount of these powders is as follows:
It is preferably about 1 to 40%, particularly 3 to 30% of the total composition.

In the oil-in-water solid cosmetic of the present invention, other ingredients used in ordinary cosmetics such as moisturizers, preservatives, antioxidants, ultraviolet absorbers, cosmetic ingredients, fragrances, and surface active agents are also included. Agent, lower monohydric alcohol, lower polyhydric alcohol,
Water-soluble polymers, clay minerals and the like can be appropriately blended within a range that does not impair the effects of the present invention.

The oil-in-water type solid cosmetic composition of the present invention emulsifies the components (b) and (c) into an oil-in-water type by a conventional method, and optionally mixes the component (d) and other optional components. And then solidified with the component (a). As one example of the specific method for producing a cosmetic of the present invention, after heating and dissolving the component (a) in the component (c), the component (b) and, if necessary, the component (d) are used.
Examples include a method in which the components are stirred and mixed, and after the required optional components are added, the components are filled in a container and then cooled and solidified.

The oil-in-water cosmetic of the present invention contains a water-soluble solidifying agent as an essential component. Due to the nature of the water-soluble solidifying agent, the solidified cosmetic surface has a smooth continuous surface different from the internal structure. It becomes the surface. This means, for example, in the case of a type of cosmetic in which a container is filled with cosmetics such as a foundation and used with an applicator such as a sponge, the applicator slips over the surface of the cosmetic, and then take it onto the applicator. Can not be used and it interferes with use.

In such a case, it suffices to expose the internal phase on the surface of the cosmetic material. For example, mechanical treatment such as cutting off the molding surface can be adopted. It is convenient to use the method.

That is, after the oil-in-water solid cosmetic of the present invention is warm-filled in a container such as a gold plate, before being solidified, a water-repellent sheet material is attached to the surface of the cosmetic, and after cooling and solidifying, It is only necessary to peel off, and by doing so, it becomes possible to form a microscopic uneven surface discontinuous phase on the cosmetic surface and expose the internal structure to the cosmetic surface, improving the usability of the cosmetic. Is possible.

The water-containing sheet material used in the molding method of the present invention may be any sheet-like material such as mesh, non-woven fabric, fiber, and paper product (paper) that can hold water in an appropriate amount. Since the affinity between the sheet-shaped material and the cosmetic material depends on the water holding amount of the material, the water holding ability should be taken into consideration when selecting the material.

Specifically, if the material has a poor water-holding capacity and the water-holding amount is too small, even if the cosmetic surface has irregularities on the surface, microscopically the surface remains a smooth surface and the internal structure appears. Since it does not come out, it is difficult to remove it from the applicator such as a sponge. Conversely, if the water holding capacity is too good, more moisture than necessary will be transferred from the cosmetic to the material and the cosmetic will dry, or the material and makeup The material adheres, and the material cannot be removed cleanly after cooling and solidifying,
The surface of the cosmetic may become uneven and lose its commercial value.

The inventors of the present invention tested several fiber materials and examined the preferred fiber materials for the molding method of the present invention. As a result, the water retention rate represented by the following formula was 10 to 250.
%, Preferably 30 to 200%, it has been clarified that any material can be used as the water-permeable sheet material of the present invention.

Water retention rate (%) = (W ₂ −W ₁ ) / W ₁ × 100 W ₁ : dry weight of sheet material (g) W ₂ : wet weight of sheet material (g)

Therefore, in the method of the present invention, if the hydrated sheet material having the above water retention rate is acetate,
It can be suitably used regardless of the material of the material such as fibers of nylon, polyester, acrylic, polypropylene and their mixed spinning.

The oil-in-water solid cosmetic composition of the present invention obtained as described above has a form in which an oil agent or the like is dispersed in the aqueous phase, and is usually in the temperature range where the cosmetic composition is stored and used ( At 0 ° C to 50 ° C), since it has no fluidity and solidifies,
It has excellent cosmetic characteristics peculiar to oil-in-water cosmetics, and is also excellent in usability and portability.

Therefore, the oil-in-water cosmetic of the present invention can be particularly advantageously used as a solid product such as cream, foundation, eye shadow, and cheek red.

[0028]

EXAMPLES The present invention will be described in more detail with reference to Examples, Comparative Examples and Test Examples, but the present invention is not limited thereto.

Examples 1 to 3 and Comparative Examples 1 to 4 Production of Foundation: An oil-in-water type foundation was produced by the following production method with the composition shown in Table 2.

(Composition) * Fluorine-based compound treatment method To 50 g of each powder was added 1000 ml of water to form a slurry. On the other hand, fluoroalkyl phosphate diethanolamine salt (Asahi Guard AG530, manufactured by Asahi Glass Co., Ltd.)
350 ml of water was added to 9 g and stirred to obtain an emulsion. This emulsion was gradually added to the above slurry, mixed, and allowed to stand at room temperature to be treated with a fluorine compound.

(Production Method) A. (11) to (19) are heated and dissolved. B. Add (1) to (9) to A and mix and disperse. After adding (10) to CB, mix, fill in a container and cool. In addition, in filling each oil-in-water cosmetic, a molding method was used in which a hydrate sheet-like material was attached to the surface of the cosmetic, solidified and then peeled off.

Comparative Example 5 Water-in-oil type solid foundation: A water-in-oil type solid foundation having the following composition was produced. (Component) Blending amount (%) (1) Titanium oxide 15.0 (2) Talc 5.0 (3) Silicic anhydride 5.0 (4) Color pigment suitable amount (5) Ceresin 3.0 (6) Microcrystalline wax 5.0 (7) Squalane 10.0 (8) Glyceryl trioctanoate Residual amount (9) Methyl polycyclosiloxane 20.0 (10) Sorbitan monooleate 1.0 (11) Polyoxyethylene sorbitan oleate 1.0 (12) Soybean phospholipid 0.5 (13) Preservative Suitable amount (14) 1,3-Butylene glycol 5.0 (15) Purified water 15.0 (16) Fragrance Suitable amount

(Production Method) A. (5) to (12) are dissolved by heating, and (1) to (4) are added and mixed and dispersed. B. (13) to (15) are dissolved by heating. C. Add B to A, emulsify, add (16), then fill in a container and cool.

Test Example 1 The foundations produced in Examples 1 to 3 and Comparative Examples 1 to 5 were evaluated for hardness, shape retention and usability. The results are shown in Table 3.

(Evaluation method) (1) Hardness: 1 using a rheometer manufactured by Fudo Kogyo Co., Ltd.
The hardness when a cylindrical adapter having a cross section of 0 mmφ was infiltrated at a constant speed (6 cm / sec) for a constant distance (2 mm) was defined as the hardness. Incidentally, the hardness of an emulsified type or oily solid cosmetic is generally 2 under the measurement conditions used in the present invention.
It is preferably in the range of 0 to 2000 g / cm ² ,
If it is 20 g / cm ² or less, it is difficult to maintain the form as a solid cosmetic, and if it is 2000 g / cm ² or more, it is difficult to remove it to a finger, an application body or the like, which causes a problem in usability.

(2) Morphological property: A cylindrical tray-shaped container having a diameter of 50 mm and a depth of 10 mm was filled, and the solid shape was maintained even after storage at 50 ° C. for 24 hours. It was set to x.

(3) Usability: Ten professional panelists conducted a usage test and evaluated the ease of use, freshness, etc. by the absolute evaluation of each person according to the following evaluation criteria. It was judged by the average score.

Evaluation criteria; Very good: 3 points Good: 2 points Normal: 1 point Bad: 0 points

Judgment: ○: 2 points or more △: 1 point or more and less than 2 points ×: Less than 1 point

(Result)

As is clear from the results shown in Table 2, the oil-in-water foundation of the present invention has physical properties as a solid cosmetic composition, yet has a good feeling of use. By treating, it exhibits excellent usability.

Example 4 Production of eye shadow:

(Component) Blending amount (%) (1) Silicone treated titanium oxide ^* 2.0 (2) Silicone treated mica titanium ^* 10.0 (3) Silicone treated sericite ^* 3.0 (4) Colored pigment 2.0 (5) Sorbitan sesquioleate 2.0 (6) Squalane 1.0 (7) Candelilla wax 1.0 (8) Fragrance proper amount (9) Preservative proper amount (10) 1,3- Butylene glycol 5.0 (11) Agar 0.5 (12) Gelatin 1.5 (13) Purified water Residual amount

* Silicone treatment: Various powders and methylhydrogenpolysiloxane (2 to powder 98) were added to isopropyl alcohol and baked at 120 ° C. for 2 hours.

(Production Method) A. (9) to (13) are heated and dissolved. B. (1) to (7) are dissolved by heating, added to A and mixed and dispersed. After adding (8) to CB, mix, fill in a container and cool. In addition, the molding used the same molding method as the cosmetics of Examples 1-3.

Example 5 Manufacturing of Hoho Red:

(Component) Blending amount (%) (1) Titanium oxide 5.0 (2) Mica titanium 5.0 (3) Sericite 5.0 (4) Talc 10.0 (5) Color pigment Suitable amount (6) Polyoxyethylene (3) Castor oil 1.0 (7) Soybean phospholipid 1.0 (8) Starch fatty acid ester 0.5 (9) Isocetyl stearate 5.5 (10) Fragrance Suitable amount (11 ) Preservative Appropriate amount (12) 1,3-Butylene glycol 5.0 (13) Gelatin 3.0 (14) Purified water Residual amount

(Production Method) A. (11) to (14) are heated and dissolved. B. (1) to (9) are mixed under heating, added to A and mixed and dispersed. After adding (10) to CB, mix, fill in a container and cool. In addition, the molding used the same molding method as the cosmetics of Examples 1-3.

Example 6 Production of antiperspirant cream: (Component) Content (%) (1) Glyceryl trioctanoate 2.0 (2) Squalane 1.0 (3) Microcrystalline wax 1.0 (4) Sucrose fatty acid ester 1.0 (5) Polyoxyethylene sorbitan oleate 1.0 (6) Colorant proper amount (7) Perfume proper amount (8) Preservative proper amount (9) 1,3-butylene glycol 10. 0 (10) Agar 1.5 (11) l-Menthol 0.1 (12) Purified water Residual amount

(Production Method) A. (1) to (7) are dissolved by heating. B. (8) to (12) are dissolved by heating. C. After adding A to B and mixing, fill a container and cool. In addition, the molding used the same molding method as the cosmetics of Examples 1-3.

Reference Example 1 Production of sunscreen cream: (ingredient) Content (%) (1) Silicone-treated fine titanium oxide 5.0 (2) Soybean phospholipid 1.0 (3) Polyoxyethylene oleate Sorbitan 1.0 (4) Glyceryl trioctanoate 2.0 (5) Sucrose fatty acid ester 1.0 (6) Fragrance suitable amount (7) UV absorber 3.0 (8) Preservative suitable amount (9) 1 , 3-Butylene glycol 10.0 (10) Gelatin 3.0 (11) Xanthan gum 0.1 (12) Purified water Residual amount

(Production Method) A. (8) to (12) are heated and dissolved. B. (1) to (7) are heated and dissolved. C. Add B to A, mix, then fill in a container and cool. In addition, the molding used the same molding method as the cosmetics of Examples 1-3.

Example 7 Surface treatment test: Using a cosmetic having the same composition as in Example 1, various materials were evaluated for suitability as a sheet material by the following method.

(Method) After the cosmetic is heated and dissolved, it is filled in a container, the material is attached, cooled, and easily removed after solidification,
The surface condition after peeling and the ease of removing the sponge were evaluated.

(Evaluation) Formability (easiness of peeling); ○: Good (small amount of contents adhered to material) ×: Poor (large amount of contents adhered to material)

Surface condition: ○: uniform ×: non-uniform (peeling unevenness)

Usability (Ease of removal on sponge); ◯: Appropriate ×: Not removable

(Result)

From the above results, it was found that a material having too high affinity with a cosmetic material would adhere to the material, so that it could not be removed cleanly after cooling and solidification, and could not be a commercial product.

[0060]

EFFECT OF THE INVENTION The oil-in-water solid cosmetic composition of the present invention is excellent in usability and portability, but is also very excellent in water feeling, affinity for skin, natural finish, and moisturizing property. It is a thing. Further, according to the molding method of the present invention, since the surface of the cosmetic material becomes a discontinuous phase, the internal structure of the cosmetic material is exposed, the cosmetic material can be easily taken into the applicator, and the oil-in-water type is excellent in usability. A solid cosmetic can be obtained. that's all

Claims (3)

[Claims] 1. An oil-in-water solid mold containing the following components (a) to (c) (a) a water-soluble solidifying agent selected from agar or gelatin (b) an oil agent (c) water Cosmetics. 2. The following components (a) to (d) (a) a water-soluble solidifying agent selected from agar or gelatin (b) an oil agent (c) water (d) powder are contained. Oil-in-water solid cosmetics. 3. A method for molding an oil-in-water cosmetic, comprising filling the container with the oil-in-water cosmetic according to claim 1 or 2 and solidifying the oil-in-water cosmetic on the surface of the cosmetic before solidifying the oil-in-water cosmetic. A method for molding an oil-in-water solid cosmetic, which comprises sticking a sheet material, cooling and solidifying, and then peeling the material.