JP2002104926A - Water-in-oil emulsion cosmetic and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-in-oil type emulsion cosmetic having low skin irritation, a good feeling in use, and excellent stability, and a water-in-oil type emulsion cosmetic. Providing a way. A water-in-oil type emulsion comprising at least one of a crosslinked polymethylsiloxane and an acrylic-silicone graft copolymer, and a nonionic modified clay mineral modified with a nonionic surfactant. Is a cosmetic. An embodiment in which the nonionic surfactant is a silicone-based surfactant, wherein the silicone-based surfactant is
A preferred embodiment is a polyoxyalkylene-modified organosiloxane surfactant. Further, the method for producing a water-in-oil emulsion cosmetic, wherein the nonionic modified clay mineral is:
A method for producing a water-in-oil emulsion cosmetic, which is obtained by adding a nonionic surfactant to a composition containing an oil component and a clay mineral.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-in-oil type emulsion cosmetic which has low skin irritation, good feeling in use, and excellent stability.

[0002]

2. Description of the Related Art Conventionally, a technique for incorporating a clay mineral into cosmetics has been actively used because of its excellent dry feeling during use and the effect of protecting the skin, and capable of suitably reducing skin irritation. As a specific technique, various techniques for containing a cation-modified clay mineral modified with a cationic surfactant or the like have been performed (JP-A-8-217618, JP-A-9-255544, JP-A-11-116433).
JP-A-10-226622, JP-A-7-2580
No. 55, JP-A-7-187954).

However, there is a problem that the stability of an emulsion is not good only with the clay mineral (Japanese Patent Laid-Open No. 21-21 / 1996).
7618, JP-A-9-255544). In addition, the cation-modified clay mineral has a problem that it is highly irritating to the skin and has a bad feeling upon use. In recent years, with the development of technology, there is a strong demand for a technology that can efficiently produce water-in-oil emulsion cosmetics with low skin irritation, good usability, and excellent emulsion stability. Have been.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and achieve the following objects. That is, the present invention provides a water-in-oil emulsion cosmetic having low skin irritation, a good feeling in use, and excellent stability, and the water-in-oil emulsion cosmetic efficiently. It is an object of the present invention to provide a method for producing a water-in-oil emulsion cosmetic which can be produced.

[0005]

Means for solving the above problems are as follows. That is, <1> at least one of a cross-linked polymethylsiloxane and an acrylic-silicone-based graft copolymer, and a nonionic modified clay mineral modified with a nonionic surfactant,
It is a water-in-oil type emulsion cosmetic characterized by containing. <2> The water-in-oil emulsion cosmetic according to <1>, wherein the nonionic surfactant has an HLB of 4 to 15. <3> The water-in-oil emulsion cosmetic according to <1> or <2>, wherein the nonionic surfactant is a silicone-based surfactant. <4> wherein the silicone surfactant is a polyoxyalkylene-modified organosiloxane surfactant.
3> The water-in-oil emulsion cosmetic described in <3>.

<5> The water-in-oil according to any one of <1> to <4>, wherein the nonionic modified clay mineral is obtained by adding a nonionic surfactant to a composition containing an oil component and a clay mineral. It is a type emulsion cosmetic. <6> The method for producing a water-in-oil emulsion cosmetic according to any one of <1> to <5>, wherein the nonionic modified clay mineral is a composition containing an oil component and a clay mineral. A method for producing a water-in-oil type emulsion cosmetic, which is obtained by adding a nonionic surfactant.

[0007] The water-in-oil emulsion cosmetic of the present invention comprises at least one of a cross-linked polymethylsiloxane and an acrylic-silicone graft copolymer, and a nonionic modified clay mineral modified with a nonionic surfactant. contains. The nonionic modified clay mineral modified with the nonionic surfactant has much lower skin irritation than the organic modified clay mineral modified with an ionic surfactant such as a cationic surfactant. Therefore, the water-in-oil emulsion cosmetic of the present invention containing the nonion-modified clay mineral is extremely excellent in low skin irritation and feeling upon use. In addition, since the nonionic modified clay mineral modified with a nonionic surfactant has a high affinity for oil and swells with the oil, the stability of the emulsion in the obtained water-in-oil emulsion cosmetic is high.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. [Water-in-oil emulsion cosmetic] The water-in-oil emulsion cosmetic of the present invention contains at least one of a cross-linked polymethylsiloxane and an acrylic-silicone graft copolymer, and a nonionic modified clay mineral. And, if necessary, other components.

-Nonionic modified clay mineral-The nonionic modified clay mineral is obtained by modifying a clay mineral with a nonionic surfactant.

-Clay mineral-The clay mineral is not particularly limited as long as it is commonly used in cosmetics. For example, di-octahedral type, tri-
Examples include a layered aluminosilicate having an octahedral crystal structure or the like. As the di-octahedral type, bentonite, montmorillonite, beidellite, and montmorillonite group minerals (smectite) such as nontronite are preferred. Particularly preferred. As the tri-octahedral type, hectorite,
Montmorillonite group minerals (smectite) such as saponite, sauconite, and stibnite are preferred, and among these, saponite and hectorite are particularly preferred in that they easily take in nonionic surfactants.

The clay mineral includes both naturally occurring ones and synthetically obtained ones. From the viewpoint of easy availability, natural ones are preferable, and the effects of the present invention can be exhibited. Then, both are preferable. These clay minerals may be used alone or in combination of two or more.

--Nonionic surfactant-- As the HLB (hydrophilic / lipophilic balance) of the nonionic surfactant, the HLB (hydrophilic / lipophilic balance) of the obtained water-in-oil emulsion cosmetic is excellent in terms of stability of the emulsion. To 15, preferably 4.5 to
7 is more preferred.

The nonionic surfactant is not particularly restricted but includes, for example, polyglycerin fatty acid esters,
Ester surfactants such as polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbite fatty acid ester, and polyethylene glycol fatty acid ester; polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl Ether surfactants such as ether; polyoxyethylene castor oil, polyoxyethylene hardened castor oil, etc .; and silicone surfactants such as polyoxyalkylene-modified organosiloxane, alkyl ether-modified organosiloxane, glyceryl ether-modified organosiloxane, and the like. Can be These nonionic surfactants may be used alone or in a combination of two or more.

Of these, silicone surfactants are preferred in that the resulting water-in-oil emulsion cosmetics have excellent emulsion stability. As the silicone-based surfactant, a polyoxyalkylene-modified organosiloxane is particularly preferable, since a particularly smooth feeling during use can be imparted. Examples of the polyoxyalkylene-modified organosiloxane include, for example, polyoxyethylene-modified organosiloxane, polyoxyethylene polyoxypropylene-modified organosiloxane, and polyoxypropylene-modified organosiloxane. However, polyoxyethylene polyoxypropylene-modified organosiloxane is preferable in terms of good properties.

The content of the nonionic modified clay mineral in the water-in-oil emulsion cosmetic is 0.1 to 40.
% By weight, more preferably 0.5 to 20% by weight. When the content is less than 0.1% by weight, the stability of the emulsion may not be ensured. On the other hand, when the content is more than 40% by weight, the viscosity of the emulsion is too high, and the dispersibility and the feeling upon use deteriorate. May be.

FIG. 1 shows a crystal of nonionic modified smectite modified with the nonionic surfactant, swollen with the silicone oil and the nonionic surfactant, and measured with a wide-angle X-ray diffractometer (RINT2000, manufactured by Rigaku Corporation). Represents a chart. In the chart of FIG. 1, the surface interval (d) = 3
At 7.4 °, a peak is observed. On the other hand, FIG.
Represents a chart obtained by measuring the interplanar spacing in a single crystal of smectite not modified with the nonionic surfactant using a wide-angle X-ray diffractometer. In the chart of FIG. 2, a peak is observed at a plane interval (d) of 12.37 °.
From the charts in FIGS. 1 and 2, it can be seen that the nonionic modified smectite modified with the nonionic surfactant has a high affinity for the silicone oil, and swells with the silicone oil and the nonionic surfactant to increase the interplanar spacing. Understand. In the measurement, a polyoxyethylene methyl polysiloxane copolymer (SH3775 manufactured by Toray Industries, Inc.) was used as a nonionic surfactant, and dimethylpolysiloxane (kinematic viscosity: 30 c) was used as a silicone oil.
St; manufactured by Toray Industries, Inc .; SH200-30cs)
Bentonite was used as smectite.

The method for producing the nonionic modified clay mineral is not particularly limited, but a method of adding the nonionic surfactant to a composition containing an oil component and the clay mineral (hereinafter referred to as “in oil” of the present invention) Method for producing water-based emulsion cosmetics "
In detail. Is preferred. According to this method, in particular, a nonionic modified clay mineral having excellent stability during emulsification can be efficiently obtained.

-Crosslinked polymethylsiloxane- The crosslinked polymethylsiloxane is added for the purpose of stabilizing an emulsion in a water-in-oil type emulsion cosmetic. As the crosslinked polymethylsiloxane, for example, methyl Examples include a copolymer of siloxane and a vinyl group-containing organosiloxane, a partially crosslinked polyether-modified organopolysiloxane, and the like. These crosslinked polymethylsiloxanes may be used alone or in combination of two or more. Among these, a partially crosslinked polyether-modified organopolysiloxane is particularly preferred in terms of sustained smoothness during use and excellent stability of the emulsion.

The content of the crosslinked polymethylsiloxane in the water-in-oil emulsion cosmetic is 0.0
It is preferably from 1 to 10% by weight, more preferably from 0.1 to 8% by weight. When the content is less than 0.01% by weight,
On the other hand, if the stability of the emulsion cannot be ensured, on the other hand, if it exceeds 10% by weight, the viscosity of the emulsion may be too high, and the dispersibility and the feeling upon use may decrease.

-Acrylic-Silicone Graft Copolymer- The acryl-silicone graft copolymer is added for the purpose of stabilizing an emulsion in a water-in-oil type emulsion cosmetic. Examples of the copolymer include a radical polymerizable monomer mainly composed of at least one of acrylate and methacrylate, and a dimethylpolymethylsiloxane compound having a radical polymerizable group at one end of a molecular chain, which is synthesized by radical polymerization. Is done.

The acrylate and methacrylate include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, -Hydroxyalkyl (meth) acrylates such as hydroxypropyl (meth) acrylate, p-
Fluoroalkyl (meth) acrylate and the like. These may be used alone or in combination of two or more.

The content of the acrylic-silicone graft copolymer in the water-in-oil emulsion cosmetic is preferably 0.01 to 10% by weight, and more preferably 1 to 8% by weight.
Is more preferred. When the content is less than 0.01% by weight, the stability of the emulsion may not be ensured. On the other hand, when the content is more than 10% by weight, the viscosity of the emulsion may be too high and the usability may be reduced. is there.

When the cross-linked methylpolysiloxane and the acryl-silicone graft copolymer are used in combination,
The content of the crosslinked methylpolysiloxane and the acrylic-silicone-based graft copolymer in the water-in-oil emulsion cosmetic is preferably 0.01 to 12% by weight, and more preferably 0.1 to 10% by weight. More preferred. When the content is less than 0.01% by weight, the stability of the emulsion may not be ensured. On the other hand, when the content is more than 12% by weight, the viscosity of the emulsion is too high, and the dispersibility and the feeling of use are reduced. May be. When the cross-linked methylpolysiloxane and the acrylic-silicone-based graft copolymer are used in combination,
The blending ratio (cross-linked methylpolysiloxane / acryl-silicone graft copolymer) is not particularly limited, and can be blended in any ratio.

-Other components- The water-in-oil type emulsion cosmetic is used in addition to water, such as purified water, and, if necessary, other commonly used water as long as the effects of the present invention are not impaired. Contains the components of The other components include dimethylpolysiloxane, cyclic silicone, trimethylsilyl-terminated dimethylpolysiloxane, silanol-terminated dimethylpolysiloxane, amino-modified silicone, betaine-modified silicone, alcohol-modified silicone, fluorine-modified silicone, mercapto-modified silicone, and carboxy-modified Oil-soluble, such as silicone oils such as silicone, fatty acid-modified silicone, and alkyl-modified silicone, ester oils, paraffin oils, waxes, glycerides, animal and vegetable oils, and low hydrophilic fatty acids, higher alcohols, and ethylene oxide adducts of alcohols Vitamins and the like.

Representative examples of these are cetyl octanoate, isopropyl isostearate, lauryl lactate, cetyl lactate, liquid paraffin, light liquid isoparaffin,
Squalane, petrolatum, isostearyl alcohol, isostearic acid, coconut oil fatty acid, hexyldecyl myristate, carnauba wax, candelilla wax,
Oils such as beeswax, triisostearin, olive oil, jojoba oil, hardened castor oil, tocopherol, tocotrienol, carotene; talc, kaolin, zinc oxide, titanium oxide, magnesium oxide, silica, mica, zeolite,
Powders of magnesium silicate, petal silica, mica titanium, silk, nylon powder, polyethylene powder, polystyrene powder, polymethacrylate, crosslinked polyacrylic acid, etc .;
p-aminobenzoic acid, ethyl p-aminobenzoate, p-
Aminobenzoic acid derivatives such as glyceryl aminobenzoate and amyl p-dimethylaminobenzoate;

Salicylic acid derivatives such as ethylene glycol salicylate, dipropylene glycol salicylate, octyl salicylate and myristyl salicylate; methyl diisopropyl cinnamate, ethyl p-methoxycinnamate, p-
Cinnamic acid derivatives such as isopropyl methoxycinnamate, 2-ethylhexyl p-methoxycinnamate and butyl p-methoxycinnamate; 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5 -Sulfonic acid, 2,2'-dihydroxy-4-
Benzophenone derivatives such as methoxybenzophenone; azole compounds such as urocanic acid and ethyl urocanate;

Representative examples thereof include UV absorbers such as 4-t-butyl-4'-methoxybenzoylmethane, pH adjusters such as citric acid, pigments, fragrances, humectants such as glycerin, and benzoates. , Carboxyvinyl polymer, xanthan gum, water-soluble polymer such as hydroxypropylmethylcellulose, polyhydric alcohol such as propylene glycol, salt, sodium sulfate, solubilizer, protein derivative, animal and plant extract, pearl appearance enhancer , Hydrotropes, preservatives, antioxidants, viscosity modifiers and the like.

The water-in-oil type emulsion cosmetic composition of the present invention described above has low skin irritation, a good feeling in use, and excellent stability.

[Production method of water-in-oil type emulsion cosmetic] The method for producing the water-in-oil type emulsion cosmetic of the present invention is the method for producing the water-in-oil type emulsion cosmetic of the present invention. , A nonionic modified clay mineral, for a composition containing oil and clay mineral,
It is obtained by adding a nonionic surfactant.

The oil component is not particularly limited, and examples thereof include squalane and silicone. As the clay mineral and the nonionic surfactant, the "clay mineral" in the description of the "water-in-oil emulsion cosmetic" of the present invention
And those similar to those already described in the section of “Nonionic surfactant”.

In the method for producing a water-in-oil emulsion cosmetic of the present invention, the nonionic surfactant needs to be added to the composition containing the oil component and the clay mineral. By adding in such an order, the clay mineral swells favorably with the oil, and the clay mineral and the oil have an affinity.
It is possible to efficiently obtain a nonionic modified clay mineral having excellent stability and dispersibility during emulsification. In addition, if the nonionic surfactant and the clay mineral are mixed first, the clay mineral becomes hard, and it becomes difficult to appropriately incorporate oil into the clay mineral, and it takes a long time to incorporate the oil, which is not preferable.

In the method for producing a water-in-oil emulsion cosmetic of the present invention, the nonion-modified clay mineral may be, for example, the clay mineral dispersed in a container containing the oil, and then the nonionic interface. It is preferably obtained by adding an activator and further stirring. The addition of the nonionic surfactant is not particularly limited, but is preferably added gradually to the composition containing the oil component and the clay mineral. The addition may be continuous or stepwise. In the former case, the addition rate is 10 to 200 ml / min.
The degree is preferred. The stirring may be manual or mechanical stirring. In the latter case, the shearing force is 1 to 3.
About 20 m / s is preferable.

The mixing ratio of the oil component and the clay mineral (oil component / clay mineral; weight ratio) is preferably 2/1 to 50/1, more preferably 3/1 to 40/1. If the blending ratio (oil content / clay mineral) is less than 2/1, the clay mineral may be poorly dispersed and the modification may be non-uniform.
When it exceeds 0/1, the nonionic surfactant is diluted, and denaturation may be insufficient.

The mixing ratio of the nonionic surfactant to the clay mineral (nonionic surfactant / clay mineral; weight ratio) is preferably from 1/200 to 200/1, more preferably from 1/20.
~ 20/1 is more preferred. If the compounding ratio (nonionic surfactant / clay mineral) is less than 1/200, the clay mineral may not be modified and stability may not be secured. Feeling may be reduced.

The chart shown in FIG. 3 shows a small angle X-ray diffractometer (Geigerflex RA) for various clay minerals.
D-PB (manufactured by Rigaku Co., Ltd.)). The chart shows a chart of small-angle X-ray diffraction measurement of a single smectite powder crystal.

The chart shows the nonionic modified smectite obtained by the method for producing the water-in-oil emulsion cosmetic of the present invention (a method in which a nonionic surfactant is added to a composition containing silicone oil and smectite). 3 shows a chart of small angle X-ray diffraction measurement of the crystal of Example 1. The chart shows a chart of small angle X-ray diffraction measurement of nonionic modified smectite crystals obtained by blending a nonionic surfactant and smectite first and then blending silicone oil. For charts and for, the surface spacing (d)
A peak is observed at = 37 °. The chart is
4 shows a chart of small-angle X-ray diffraction measurement of a crystal obtained by gelling smectite with water. No peak is observed in the chart.

By comparing the charts in FIG. 3 with and, the nonionic modified smectite modified with the nonionic surfactant has a high affinity for the silicone oil regardless of the order of blending. It can be seen that the surface spacing is widened by swelling with the surfactant. Furthermore, in the method for producing a water-in-oil emulsion cosmetic of the present invention (a method in which a nonionic surfactant is added to a composition containing silicone oil and smectite), smectite is prepared by using a silicone oil and a nonionic surfactant. Swelled efficiently and in a short time, and the surface spacing was widened. In the above measurement, a polyoxyethylene methyl polysiloxane copolymer (manufactured by Toray Industries, Ltd .; SH3775) was used as a nonionic surfactant, and dimethylpolysiloxane (kinematic viscosity: 30 cSt; Toray SH200-3
0cs), and bentonite was used as smectite.

According to the method for producing the water-in-oil emulsion cosmetic of the present invention described above, the water-in-oil emulsion cosmetic of the present invention can be efficiently produced.

[0039]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples. In the table below, the amount is "% by weight".
It was expressed by.

(Examples 1 to 8) [Preparation of water-in-oil type emulsion cosmetic]-Preparation of oil phase-In Table 1, a clay mineral ( After blending the stated amount of bentonite, the corresponding nonionic surfactant was gradually added in the stated amount (addition rate: 5).
(0 ml / min) and stirred (shear force: 5 m / s) to prepare an oil phase containing a nonionic modified clay mineral. —Preparation of Water-in-Oil Emulsion Cosmetics— The obtained oil phase is put into a mixing tank equipped with a homomixer, and a previously prepared aqueous phase (composition: described in Table 1) is added.
While emulsifying, mixing, and cooling, perfume A to C (Table 2: Perfume A, Table 3: Perfume B, Table 4: Perfume C) having the composition shown in Tables 2 to 4 were mixed in the amount described, and allowed to reach room temperature. Upon cooling, a water-in-oil emulsion cosmetic of the present invention was prepared.

<Evaluation of Stability and Usability of Water-in-Oil Emulsion Cosmetic> -Evaluation of Stability- The obtained water-in-oil-emulsion cosmetic was placed in a 50-ml vial, and heated at 50 ° C. After storage at a high temperature for one month, whether or not separation had occurred was visually observed and evaluated according to the following criteria. Table 1 shows the results.

--Criterion-- ○: Not separated at all. Δ: Slight separation is observed. X: Separation of 1 cm or more is observed.

-Evaluation of feeling of use- An appropriate amount of the obtained water-in-oil emulsion cosmetic was applied to the face by 10 subjects, and the "irritating feeling" and "smooth feeling" were evaluated according to the following criteria and averaged. The points were calculated and evaluated for usability. Table 1 shows the average points of the “irritating feeling” and the “smooth feeling”.

--Evaluation Criteria for Irritation-- 5 points: No irritation. 4: No irritation. 3 points: Neither. 2 points: There is slight irritation. 1 point: There is considerable irritation.

--Evaluation Criteria for Smoothness-- 5 points: No stickiness at all, and smoothness. 4 points: No stickiness, smooth 3 points: Neither. 2 points: Somewhat sticky. 1 point: quite sticky.

(Example 9) In Example 1, "Preparation of oil phase", the clay mineral (bentonite) and the nonionic surfactant were mixed in the amounts shown in Table 1, and then mixed with the oil phase component. In the same manner as in Example 1, an oil phase containing a nonionic modified clay mineral was prepared, a water-in-oil emulsion cosmetic was prepared, and the "stability" and "stability" of the water-in-oil emulsion cosmetic were prepared. Usability "was evaluated. As a result, the "stability" and the "feel of use" were as good as those of Example 1, but when the clay mineral (bentonite) and the nonionic surfactant were blended, the clay mineral became harder. It took a long time (about one day) to produce a nonionic modified clay mineral.

(Comparative Examples 1-2) [Preparation of Water-in-Oil Emulsion Cosmetic] -Preparation of Oil Phase- In "Preparation of oil phase" in Examples 1-8, "clay mineral (bentonite)""Nonionicsurfactant" was added in the amount shown in Table 1 in place of "cation-modified bentonite".
The oil phase containing the cation-modified clay mineral was prepared in the same manner as in Examples 1 to 8 with the compositions described in Comparative Examples 1 and 2 in Table 1 except that no was used. -Preparation of water-in-oil emulsion cosmetic-Water-in-oil emulsion cosmetic using the obtained oil phase in the same manner as in "Preparation of water-in-oil emulsion cosmetic" in Examples 1 to 8. Was prepared.

<Evaluation of stability and feeling of use of water-in-oil type emulsion cosmetic> Water-in-oil type emulsion using the obtained water-in-oil type emulsion cosmetic in the same manner as in Examples 1 to 8 "Stability" of cosmetics
And the "feel of use" were evaluated. Table 1 shows the results.

Comparative Example 3 In the same manner as in Examples 1 to 8,
With the composition described in Comparative Example 3 in Table 1, an oil phase containing a nonionic modified clay mineral was prepared, and a water-in-oil emulsion cosmetic was prepared. And "feeling of use" were evaluated. Table 1 shows the results.

(Comparative Example 4) [Preparation of water-in-oil emulsion cosmetic]-Preparation of oil phase-In "Preparation of oil phase" in Examples 1 to 8, "clay mineral (bentonite)" and "nonion" An oil phase was prepared with the composition described in Comparative Example 4 in Table 1 in the same manner as in Examples 1 to 8, except that “surfactant” was not used. -Preparation of a water-in-oil emulsion cosmetic- Using the obtained oil phase, in the same manner as in "Preparation of a water-in-oil emulsion cosmetic" of Examples 1 to 8, Was prepared.

<Evaluation of stability and feeling of use of water-in-oil emulsion cosmetic> Water-in-oil emulsion was prepared in the same manner as in Examples 1 to 8 using the obtained water-in-oil emulsion cosmetic. "Stability" of cosmetics
And the "feel of use" were evaluated. Table 1 shows the results.

[0052]

[Table 1]

In Table 1, indicates a nonionic surfactant, indicates a clay mineral, and indicates an oil phase component.

[0054]

[Table 2]

[0055]

[Table 3]

[0056]

[Table 4]

The details of each component shown in the above table are shown below. (Nonionic surfactant):-POE (40) hardened castor oil (HCO-40, manufactured by Nikko Chemicals)-POE (3) secondary alkyl ether (BT-3, manufactured by Nikko Chemicals)-Polyoxyethylene methylpoly Siloxane copolymer (KF351A (HLB: 14.5), KF353A
(HLB: 10.0), KF615A (HLB: 14.
0), KF618 (HLB: 13.5), KF945A
(HLB: 4.5), KF6011 (HLB: 14.
5), KF6013 (HLB: 10.0), KF601
5 (HLB: 4.5), KF6016 (HLB: 4.5).
5), KF6017 (HLB: 4.5), manufactured by Shin-Etsu Chemical Co., Ltd.)

A poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, KF352A (H
LB: 7.0), KF615A (HLB: 14.0),
KF6008 (HLB: 6.5), KF6012 (HL
B: 7.0), manufactured by Shin-Etsu Chemical Co., Ltd. ・ Polyoxyethylene / methylpolysiloxane copolymer (SH3746 (HLB: 11.5), SH3771C
(HLB: 13.0), SH3772C (HLB: 6.
0), SH3773C (HLB: 8.0), SH377
5C (HLB: 5.0), manufactured by Dow Corning Toray Silicone Co., Ltd.)

Poly (oxyethylene-oxypropylene) methylpolysiloxane copolymer (SH3748)
(HLB: 5.0), SH3749 (HLB: 7.
5), manufactured by Dow Corning Toray Silicone Co., Ltd.)

(Crosslinked polymethylsiloxane): Crosslinked methylpolysiloxane (KSG15, KSG1)
6. Shin-Etsu Chemical Co., Ltd.) ・ Cross-linked methylphenylpolysiloxane (KSG18,
・ Shin-Etsu Chemical Co., Ltd.) ・ Cross-linked polyether-modified silicone (KSG21, Shin-Etsu Chemical Co., Ltd.)

(Acrylic-silicone graft copolymer): Acrylic silicone (KP541, KP545, manufactured by Shin-Etsu Chemical Co., Ltd.)

[0062]

According to the present invention, skin irritation is low,
Water-in-oil type emulsion cosmetic having good feeling in use and excellent stability, and method for producing water-in-oil type emulsion cosmetic capable of efficiently producing the water-in-oil type emulsion cosmetic Can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a chart obtained by measuring a crystal of nonionic modified smectite modified with a nonionic surfactant and swollen with a silicone oil and a nonionic surfactant with a wide-angle X-ray diffractometer (RINT2000, manufactured by Rigaku Corporation). is there.

FIG. 2 is a chart showing a chart of a smectite single crystal not modified with a nonionic surfactant measured by a wide-angle X-ray diffractometer.

Fig. 3 X-ray diffraction of various clay minerals using a small-angle X-ray diffractometer
It is a figure showing the chart (chart-) of the measurement result at the time of performing a line diffraction measurement.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gen Takenaka 1-3-7, Honjo, Sumida-ku, Tokyo F-term in Lion Corporation (reference) 4C083 AA122 AB102 AB172 AB212 AB242 AB441 AB442 AC022 AC122 AC172 AC182 AC212 AC312 AC342 AC352 AC432 AC472 AC482 AC532 AC542 AD072 AD092 AD112 AD152 AD161 AD162 AD532 AD662 BB04 BB11 BB41 DD32 EE01 EE05 EE10 FF05

Claims (6)

[Claims] 1. A water-in-oil type containing at least one of a crosslinked polymethylsiloxane and an acrylic-silicone graft copolymer, and a nonionic modified clay mineral modified with a nonionic surfactant. Emulsion cosmetics. 2. The nonionic surfactant has an HLB of 4-1.
The water-in-oil type emulsion cosmetic according to claim 1, which is 5. 3. The water-in-oil emulsion cosmetic according to claim 1, wherein the nonionic surfactant is a silicone-based surfactant. 4. The water-in-oil emulsion cosmetic according to claim 3, wherein the silicone-based surfactant is a polyoxyalkylene-modified organosiloxane-based surfactant. 5. The water-in-oil emulsion cosmetic according to claim 1, wherein the nonionic modified clay mineral is obtained by adding a nonionic surfactant to a composition containing an oil component and a clay mineral. Fees. 6. The method for producing a water-in-oil type emulsion cosmetic according to claim 1, wherein the nonionic modified clay mineral is a nonionic modified clay mineral with respect to a composition containing an oil component and a clay mineral. A method for producing a water-in-oil emulsion cosmetic, which is obtained by adding a surfactant.