JPH11315015A - Cosmetic and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cosmetic having improved skin load and skin adhesion, an excellent feeling in use, etc., comprising a pigment, an aqueous component, an oily component and a surfactant, by adding a specific compound to the oily component. SOLUTION: This cosmetic comprises (A) a pigment (preferably an inorganic pigment such as iron oxide or the like and a surface treating inorganic pigment), (B) an aqueous component (preferably glycerol, ethanol or the like), (C) an oily component (preferably squalane, jojoba oil, etc.), and (D) a surfactant in which the component C contains a polyoxypropylene derivative. The objective cosmetic is preferably an aqueous double layer foundation type cosmetic in which the component A covered with a W/O type emulsion is dispersed in water and the component A does not exist in the vicinity of the surface of the dispersion. A reaction product of a polyoxypropylene n-butyl-ester and a polyoxypropylene glycol having 52 oxypropylene repeating units or the like, etc., are preferable as the polyoxypropylene derivative.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic and a method for producing the same, and more particularly to an aqueous two-layer type foundation which beautifully adjusts skin color, hides skin imperfections such as spots and freckles, and provides appropriate gloss and tension. Type of cosmetics.

[0002]

2. Description of the Related Art A skin, such as a foundation, which beautifully adjusts skin color, hides skin imperfections such as spots and freckles, imparts appropriate gloss and tension, and protects the skin from ultraviolet rays, wind, cold, etc. In recent years, cosmetics that are directly applied to cosmetics have been widely used.

[0003] Foundations are broadly classified into solid foundations and liquid foundations. Liquid foundations are furthermore emulsified foundations (lipophilic (W / O) and hydrophilic (O / W)), oily foundations, and aqueous foundations. Layer type aqueous foundation).

[0004] A solid foundation is formed by press-molding a pigment (enrichment pigment and coloring pigment), which is mainly a powder, and an oil component and a wax using a binder, and is applied to the skin using a sponge wetted with water or the like. . Such a solid type is convenient for carrying the product shape and is unlikely to lose its makeup, but has a large pigment content and a small amount of oily components, so that the burden on the skin (skin irritation, etc.) is large, and moisturizing. Action and protection are not enough.

[0005] Among the liquid foundations, the emulsified foundations are those in which a pigment is dispersed in an emulsified system comprising water and oil (optionally a humectant and a surfactant), and are lipophilic (W / O) type and hydrophilic type. There is an (O / W) type, which generally has a moisturizing effect on the skin and is excellent in a natural and glossy finish, but tends to have poor covering power for hiding skin defects. The lipophilic (W / O) type has good adhesion to the skin (glue), but has a heavy feel and no refreshing feeling, while the hydrophilic (O / W) type has a relatively light touch and refreshing feeling. However, makeup is easily lost due to sweat or the like.

[0006] The oily foundation is literally mainly composed of oily components and is therefore suitable for a dry season such as winter, but cannot be used in summer because of stickiness.

The aqueous foundation (two-layer type aqueous foundation) is obtained by dispersing a pigment in an aqueous phase containing water as a main component. When not in use, an upper layer which is an aqueous phase containing no pigment and a lower layer containing a pigment are used. Since it is separated, it must be shaken and mixed well when using it. This aqueous foundation has a refreshing feeling when used,
The burden on the skin is small, but the adhesion to the skin is poor and makeup is easily lost.

[0008]

SUMMARY OF THE INVENTION The present inventor has sought to solve the above-mentioned problems of the prior art, that is, to obtain a cosmetic composition having good feeling in use, burden on the skin, and good adhesion to the skin. We examined repeatedly.

[0009] Accordingly, an object of the present invention is to provide a load on the skin,
An object of the present invention is to provide a cosmetic having good adhesiveness to the skin.

Another object of the present invention is to provide an aqueous two-layer type foundation type cosmetic which is excellent in both the burden on the skin and the adhesiveness to the skin, and is excellent in the feeling of use, moisturizing and protecting the skin. Is to provide.

It is a further object of the present invention to provide a method for producing the above cosmetic.

[0012]

The present invention resides in a cosmetic comprising a pigment, an aqueous component, an oily component and a surfactant, wherein the oily component contains a polyoxypropylene derivative.

The above pigment generally takes a form covered with a W / O emulsion comprising an oily component, an aqueous component and a surfactant.

The polyoxypropylene derivative is a polyoxypropylene alkyl ether or 1,1-methylene-
Polyoxypropylene derivative which is a reaction product of bis (4-isocyanatocyclohexane) and polyoxypropylene glycol. The alkyl of the above polyoxypropylene alkyl ether has 3 to 6 (particularly 4; n-butyl, tert)
-Butyl, isobutyl, sec-butyl, especially n-butyl). The number of repetitions of the oxypropylene is preferably in the range of 2 to 100 (particularly 20 to 100).

The above-mentioned cosmetic is a so-called aqueous two-layer foundation type cosmetic, in which a pigment covered with a W / O emulsion is dispersed in water and the pigment is not present near the surface of the dispersion. Preferably, there is.

The above-mentioned cosmetic composition is obtained by heating and melting an oil component containing a polyoxypropylene derivative and a surfactant, emulsifying water containing an aqueous component to form a W / O emulsion, and then forming the emulsion. It is advantageously obtained by a method for producing a cosmetic comprising dispersing a pigment therein and further adding water containing an aqueous component.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The cosmetic of the present invention has a basic constitution comprising a pigment, an aqueous component, an oil component and a surfactant. The oily component contains a polyoxypropylene derivative. The pigment is generally an oily component,
It is in a form covered with a W / O emulsion comprising an aqueous component and a surfactant. The present invention provides a so-called aqueous two-layer type foundation type cosmetic which is covered with an oil component but is dispersed in water containing an aqueous component, and has no pigment near the surface of the dispersion. It is advantageous in obtaining excellent effects (both good on the skin and good adhesion to the skin, and further excellent in feeling of use, moisturizing and protecting the skin).

The pigments mainly have the function of concealing defects such as unevenness and coloring of the skin, and those used in ordinary cosmetics can be used. For example, white pigments such as titanium oxide; yellow pigments such as yellow iron oxide; blue pigments such as navy blue; red pigments such as red iron; black pigments such as iron black and carbon black; talc, kaolin, silica, alumina white, bentonite Extenders such as calcium carbonate and barium sulfate; various organic pigments such as azo pigments;
Examples include pearl pigments such as mica titanium and synthetic polymer powders such as nylon and polyethylene; surface-treated pigments such as silicone-treated iron oxide, silicone-treated titanium oxide, and silicone-treated talc. Further, dyes such as tar dyes can be used. In particular, use of inorganic pigments such as iron oxide and titanium oxide and surface-treated inorganic pigments is preferred in terms of skin irritation.

The aqueous component mainly has a function as a pigment dispersion medium, a function as a binder, and a function of keeping moisture.
For example, alcohols such as ethanol and isopropyl alcohol; glycerin, 1,3-butylene glycol, dipropylene glycol, diglycerin, 3-methyl-
1,3-butylene glycol, sorbitol, 1,3-
Polyhydric alcohols such as butylene glycol; and moisturizing agents such as sodium pyrrolidonecarboxylate, amino acids (eg, L-arginine, trimethylglycine), polysaccharides, mucopolysaccharides, and cucumber extract. In particular, use of trimethylglycine, glycerin, 1,3-butylene glycol, and ethanol is preferable in terms of the moisturizing effect and feeling of use.

Water, such as purified water, is appropriately used together with the above-mentioned aqueous component, and is used in large amounts, particularly in the case of preparing an aqueous foundation.

The oily component is used in the present invention in the form of being dispersed in fine particles, and imparts adhesiveness to the skin, moisturizing and protecting the skin when used as a cosmetic without deteriorating the feeling of use. I do.

Examples of the oily component include animal and plant waxes (eg, lanolin, adsorptive purified lanolin, jojoba oil, beeswax, salami beeswax, wood wax, carnauba wax, candelilla wax), and animal and plant hydrocarbons (eg, squalane) , Olive squalane), animal and vegetable oils (eg, tri (caprylic / capric acid) glyceride, olive oil, camellia oil), higher fatty acids (eg, stearic acid, oleic acid), higher alcohols (eg, behenyl alcohol, cetyl alcohol, stearyl alcohol, oleyl) Alcohols), higher fatty acid esters (eg, octyldodecyl myristate), silicone oils (eg, methylpolysiloxane), hydrocarbons (eg,
Solid paraffin, liquid paraffin, petrolatum), cholesterols (eg, cholesterol) and the like. In particular, squalane, jojoba oil, birds (capril,
The use of (capric acid) glycerides and sebum-like components (eg, cholesterol) is preferred in view of compatibility with the skin.

In the present invention, the oil component is finely dispersed in water together with a surfactant, and the oil component contains a polyoxypropylene derivative. This facilitates fine dispersion of the oily component, and also improves the dispersion stability of the pigment when the pigment is dispersed by the emulsion thus obtained, and improves the feeling of use and adhesion when used as a cosmetic. And other excellent effects can be obtained.

The polyoxypropylene derivative is preferably a polyoxypropylene alkyl ether or a reaction product of 1,1-methylene-bis (4-isocyanatocyclohexane) and polyoxypropylene glycol. The polyoxypropylene alkyl ether has 3 to 6 carbon atoms (particularly 4; n-butyl, t
tert-butyl, isobutyl, sec-butyl, especially n
-Butyl) is preferred. The number of oxypropylene repeats is preferably in the range of 2 to 100 (particularly, 20 to 100). Specifically, polyoxypropylene (5
2) butyl ether (oxypropylene repeat number 5
2) is preferred.

The weight average molecular weight of the reaction product of 1,1-methylene-bis (4-isocyanatocyclohexane) and polyoxypropylene glycol is about 4000 to about 18
000 is preferred, and the number of repetitions of oxypropylene in the polyoxypropylene glycol is preferably in the range of 2 to 100 (particularly 10 to 60).

The amount of the polyoxypropylene derivative used is
5 to 40% by weight of the oily component is preferable, and particularly 10 to 30% by weight.
% By weight.

The surfactant used in the present invention includes:
Nonionic surfactants such as sorbitan sesquioleate, monoglyceride, and polyoxyethylene ether can be exemplified. If desired, anionic and cationic surfactants can be used. The amount of the surfactant to be used is preferably 0.1 to 10% by weight of the oil component, particularly 1 to 5% by weight.

In the cosmetic of the present invention, in addition to the above main components,
Preservatives (eg, paraoxybenzoate); vitamins (eg, natural vitamin E, vitamin A oil, ergacalciferol); medicinal ingredients (stearyl glycyrrhetinate, allantoin, hinokitiol, cucumber extract); emulsion stabilizers (eg, Magnesium sulfate)
Can be used.

The cosmetic of the present invention can be produced, for example, as follows.

First, a W / O type (lipophilic) emulsion for improving the dispersion stability of a pigment (powder) is heated and melted with an oil component containing polyoxypropylene alkyl ether and a surfactant, and then melted. It is prepared by emulsifying water. The melting of the oily component depends on the melting point of the component used, but is generally heated to 50 to 100 ° C. to melt. At this stage, vitamins, preservatives and the like can be appropriately added. The melted oily component is generally filtered using a stainless steel filter (eg, 200 mesh (opening 75 microns)) or the like, and then emulsified.

The emulsification is performed using, for example, a vacuum emulsifying apparatus. That is, for example, the melted oily component is sucked into a vacuum emulsifier, and water containing an aqueous component such as a polyhydric alcohol is heated and dissolved in the same manner as described above, filtered, and then sucked into a vacuum emulsifier. Next, a paddle mixer (rotation speed: 30 to 100 rpm) and a homomixer (2000)
The mixture is stirred for several tens of minutes while heating to a maximum temperature of 90 ° C. using 5,000 rpm to emulsify, and then cooled while stirring with a paddle mixer (about 20 to 50 rpm).

Using the W / O type emulsion (lipophilic type emulsified cream) thus obtained, various pigments are kneaded using a suitable kneader (eg, a roll mill) and a disperser (in this case, A dispersant such as a surfactant is used as appropriate) to obtain a color base.

The obtained color base is again mixed and dispersed with an aqueous component (generally containing water, alcohol, polyhydric alcohol as a main component, and further containing a moisturizing component, a medicinal component, an antiseptic, etc.), and a predetermined concentration. To get cosmetics. What is obtained in this way is a two-layer type aqueous foundation. For example, if it is used in a color base state, it can be used as a solid type foundation.

The composition ratio of the cosmetic of the present invention is as follows:
The ratio of the aqueous component to the oil component is 5 to 40:50 to 90: 5.
Is preferably in the range of from 20 to 20, particularly from 10 to 20:70 to 8
The range of 5: 5 to 10 is preferred.

[0035]

EXAMPLES Example 1 <Preparation of W / O Emulsion (Lipophilic Emulsion)> A material shown in Table 1 below was prepared.

[0036]

[Table 1]

First, the materials (oil components) of the above Nos. 1 to 14 were heated and melted at 70 ° C. in an oil dissolving tank, and then filtered using a stainless steel filter (200 mesh (opening 75 microns)). did. The melt is sucked into a vacuum emulsifier, and the materials (aqueous component and water) of the above Nos. 15 to 18 are heat-dissolved in a dissolving tank in the same manner as described above, and after filtration,
A vacuum emulsification device was used to suck. Next, a paddle mixer (60 rpm) and a homomixer (3600 rpm)
m) to emulsify by stirring for 15 minutes while heating to a maximum temperature of 90 ° C., and then use a paddle mixer (about 40 rpm).
The mixture was cooled to 35 ° C. with stirring in m).

The number of repetitions (number of poly) of oxypropylene of the polyoxypropylene n-butyl ether of No. 9 used above was 52. <Preparation of color (yellow) base> Prepared using the materials shown in Table 2 below.

[0039]

[Table 2]

The materials Nos. 1 to 5 and the lipophilic emulsified cream No. 7 were kneaded, then the surfactant No. 6 was added, and the mixture was kneaded three times with a three-roll made of natural stone to sufficiently disperse the pigment. Got a color base.

<Preparation of a Two-Layer Type Aqueous Foundation> Prepared using the materials shown in Table 3 below.

[0042]

[Table 3]

The polyhydric alcohol of No. 2 was added to the color base of No. 1 and sufficiently kneaded with a homomixer to make it uniform. A solution in which the moisturizing component of No. 7 was dissolved in the purified water of No. 8 was gradually added to this with stirring with a homomixer, and uniformly dispersed. Further, to the obtained dispersion, a solution obtained by dissolving the preservative of No. 3 and the medicinal component of No. 4 in the alcohol of No. 5 and a plant extract are added, and the mixture is sufficiently stirred and mixed to form a two-layer aqueous foundation. Obtained.

Example 2 In Example 1, instead of polyoxypropylene n-butyl ether, 1,1-methylene-bis (4-isocyanatocyclohexane) and polyoxypropylene glycol (weight average molecular weight: about 4,000, Number of repeating propylene (number of poly)
A two-layer aqueous foundation was obtained in the same manner as in Example 1 except that the same amount of the reaction product as in 12) was used.

[Evaluation of Foundation] (I) The aqueous foundation obtained in Examples 1 and 2 and a commercially available aqueous foundation were tested for dispersibility and fixability as follows.

The above-mentioned foundation was applied to a polyethylene sheet having a width of 60 mm and a length of 100 mm, and the appearance of the applied product was visually evaluated.

The color of the aqueous foundation is yellow, but the pigments used are changed to prepare five kinds of foundations for Example 1, green, pearl, orange, and red. Were also prepared to obtain two types of foundations, and the above-described tests were performed on these. Similarly, five types of commercially available aqueous foundations were prepared.

(A) First, the appearance immediately after application was observed. In Examples 1 and 2, there was no "repelling" and the leveling was good, but many "repelling" occurred in the commercially available products.

(B) After the coating, the coating was dried at 55 ° C. for 5 minutes, and the coating layer was spread again by hand. As a result, both the examples and the commercial products were well leveled.

(C) After coating, the coating is dried at 55 ° C. for 30 minutes,
The coating layer was lightly rubbed with the abdomen of the fingers while pouring water on the coating layer. As a result, the coating layer of the example was less peeled than the commercial product.

(D) When the applied material of (c) was thoroughly rubbed with the abdomen of fingers of a hand while further flowing water,
In the case of the embodiment, while there is almost no change from (c),
In the case of the commercial product, the coating layer almost peeled off.

(II) The aqueous foundation obtained in Examples 1 and 2 and a commercially available aqueous foundation
A 20-year-old female panelist was actually used on the face and evaluated for its feeling of use (smoothness, moisture, gloss, growth, smell, difficulty falling, and comfort).

The results are shown in Table 4 (Example 1) and Table 5 (Example 2).

[0054]

[Table 4] In addition, the evaluation of good, equivalent, and inferior in Table 4 is evaluation compared with the commercial product of the foundation of Example 1.

From the results in the above table, it can be seen that the foundations of the examples are particularly excellent in luster, difficulty in dropping, and wearing comfort compared to commercial products.

[0056]

[Table 5] In addition, the evaluation of good, equivalent, and inferior in Table 5 is evaluation compared with the commercial product of the foundation of Example 2.

From the results in the above table, it can be seen that the foundation of Example 2 is particularly excellent in moisture, gloss, difficulty in falling down, and wearing comfort as compared with the commercial product.

[0058]

EFFECT OF THE INVENTION The cosmetic of the present invention has improved applicability to the skin, is comfortable to wear, and is hardly washed away by sweat or water after application to the skin, and does not easily lose its makeup. In addition, there is an advantage that the cosmetic is less irritating to the skin. Furthermore, it has an excellent moisturizing effect after makeup, prevents drying of the skin, and can be used satisfactorily regardless of the season, including not only the dry season but also the high humidity season. In particular, when the cosmetic of the present invention is used as a two-layer type aqueous foundation, the above effects can be remarkably obtained.

The reason that the cosmetic of the present invention can obtain the above-mentioned excellent effects is presumed as follows.

The lipophilic emulsified cream contained in the cosmetic of the present invention is atomized and dispersed in a form containing the polyoxypropylene derivative of the present invention in an oily component, which is uniformly adsorbed on the surface of the pigment, Satisfactorily is prevented. For this reason, at the time of use, each pigment will adhere to the skin via the emulsion, and not only can the thin and uniform cosmetic application be easily performed, but also it is difficult for the cosmetic to peel off from the skin. It is thought that there is.

Claims (7)

[Claims] 1. A cosmetic comprising a pigment, an aqueous component, an oil component and a surfactant, wherein the oil component contains a polyoxypropylene derivative. 2. The cosmetic according to claim 1, wherein the pigment is covered with a W / O emulsion comprising an oil component, an aqueous component, and a surfactant. 3. The polyoxypropylene derivative is a polyoxypropylene derivative which is a reaction product of polyoxypropylene alkyl ether or 1,1-methylene-bis (4-isocyanatocyclohexane) and polyoxypropylene glycol. 2. The cosmetic according to 1. 4. The cosmetic according to claim 3, wherein the alkyl of the polyoxypropylene alkyl ether has 3 to 6 carbon atoms. 5. The cosmetic according to claim 3, wherein the number of repeating oxypropylene of the polyoxypropylene alkyl ether is 2 to 100. 6. The cosmetic according to claim 2, wherein the pigment covered with the W / O emulsion is dispersed in water, and the pigment is not present near the surface of the dispersion. 7. After heating and melting an oil component and a surfactant containing a polyoxypropylene derivative, water containing an aqueous component is emulsified to form a W / O emulsion, and then a pigment is dispersed in the emulsion. And adding water containing an aqueous component.