TW201328717A - Water-oil type emulsified cosmetic material and skin care method - Google Patents

Abstract

The present invention provides a water-oil type emulsified cosmetic material that contains the following components (A)-(E): (A) 0.5 to 10 mass % of polysiloxane elastomer, (B) 0.2 to 10 mass% of Dimethyl polysiloxane with degree of polymerization more than 350 and less than 1,500, (C) 3 to 28 mass% of dimethyl polysiloxane and/or decamethylcyclopentasiloxane siloxane with degree of polymerization more than 1 and less than 6, (D) 0.5 to 25 mass% of ethanol, and (E) water.

Description

Oil-type emulsified cosmetic and skin care method

The present invention relates to an oil-based emulsified cosmetic and a skin care method.

In people's daily lives, the skin is often continuously damaged by external ultraviolet rays such as ultraviolet rays from the sun, exhaust from automobiles, air pollution from factories, smokers from outside, and makeup. In the present invention, the effect of protecting the skin from such external stimuli is defined as an isolation effect.

To date, research has been conducted on cosmetics that protect the skin from the ultraviolet rays of the sun, the exhaust from the automobile, the dust from the factory, and the smoke of the tobacco. Among these, research has been conducted to suppress adhesion and penetration of stimulating substances by forming a film on the surface of the skin (Patent Documents 1 to 4).

Patent Document 1 proposes a water-based emulsified makeup in a high internal phase oil combined with a polyoxyxene elastomer and a high molecular weight polyfluorene as a cosmetic having no stickiness, a good feeling of use, and good stability. material. However, since this cosmetic material uses a polymerized polyoxygenated oxygen, it is difficult to spread at the time of coating, and there is a feeling of residual film after application, and a film having an excellent feeling of touch cannot be obtained, and dirt adheres easily, and storage stability is also insufficient.

Patent Document 2 proposes a combination of a polysiloxane elastomer, an organopolyoxyl resin, and an acrylic-polyfluorene as a cosmetic which is excellent in water and oil resistance, has a good coverage on the skin, and is excellent in the persistence of a makeup effect. A water-based underlayer cosmetic in an oil of an oxygen-based graft copolymer.

In addition, in Patent Document 3, a cosmetic material having excellent cosmetic durability and excellent stability over time is proposed. A water-based cosmetic in an oil of a cerium oxygen elastomer or an acrylic acid-polyoxygenated graft copolymer. However, these coatings have a heavy touch feeling due to a strong residual feeling of the film after application, and a refreshing feeling of use cannot be obtained.

Patent Document 4 proposes a combination of a polyoxyxene elastomer and an oil-soluble one, which is excellent in durability of water resistance and sunscreen effect, and has a good feeling of use and excellent stability in which a sticky feeling and a slippery feeling are suppressed. Ultraviolet absorbent, water-soluble polymer, water-based sunscreen cosmetic. However, since the cosmetic contains a water-soluble polymer, sufficient water repellency cannot be obtained, and the durability is also weak, so that the effect of isolating external stimuli, especially the ultraviolet ray, is not sufficient.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-2925

[Patent Document 2] Japanese Patent Laid-Open No. Hei 10-236917

[Patent Document 3] Japanese Patent Laid-Open No. Hei 11-180847

[Patent Document 4] Japanese Patent Laid-Open No. Hei 9-175977

The present invention relates to an oil-based emulsified cosmetic containing the following components (A) to (E): (A) a polyfluorene oxide elastomer in an amount of 0.5 to 10% by mass, and the polyfluorene oxide system provides the following An organohydrogenated polyoxyalkylene represented by the formula (a-1) and/or the following formula (a-2), a polyoxyalkylene group represented by the following formula (a-3), and/or Obtained by the addition polymerization of an organopolysiloxane represented by the following formula (a-4), R ¹ _a R ² _b H _c SiO _(4-abc)/2 (a-1)

R ¹ _j H _k SiO _(4-jk)/2 (a-2)

C _m H _2m-1 O(C ₂ H ₄ O) _p (C ₃ H ₆ O) _q C _m H _2m-1 (a-3)

R ¹ _d R ³ _e SiO _(4-de)/2 (a-4) wherein the component represented by the above formula (a-1) and/or the formula (a-3) is an essential component (wherein R ¹ is a substituted or unsubstituted alkyl or aryl, aralkyl or halogenated hydrocarbon group having the same or different carbon number of 1 to 18, R ² is a formula -C _n H _2n O(C ₂ H ₄ O) _f (C ₃ H ₆ O) _g R ⁴ is an organic group, and the R ³ terminal has a hydrocarbon group having a carbon number of 2 to 10, and R ⁴ is hydrogen. a saturated organic group having 1 to 10 carbon atoms or a group represented by R ⁵ -(CO)-, and R ⁵ is a saturated organic group having 1 to 5 carbon atoms, a, b, c, d, e, j and k They are 1.0≦a≦2.5, 0.001≦b≦1, 0.001≦c≦1, 1.0≦d≦3.0, 0.001≦e≦1.5, 1.0≦j≦3.0 and 0.001≦k≦1.5, f and p are 2~ An integer of 200, g and q are integers from 0 to 200, f+g is 3 to 200, p+q is 3 to 200, m and n are 2 to 6) (B) polymerization degree is 350 or more and 1500 or less. Methyl polyoxyalkylene 0.2 to 10% by mass, (C) dimethyl polyoxyalkylene having a polymerization degree of 1 or more and 6 or less and/or 10 to 28% by mass of decamethylcyclopentaoxane, (D) Ethanol 0.5~25% by mass, (E) water.

Further, the present invention provides a skin care method for using and maintaining a water-based emulsified cosmetic in the oil.

As described above, in any of the prior art, a polymer or a polyoxymethylene resin or the like is often used for forming a film, and therefore, there is a problem that a sticky feeling is generated at the time of coating, and a film is formed on the skin after application. Feelings such as feelings or tightness, etc. Moreover, it is impossible to achieve both the stability, the isolation effect and the refreshing feeling to the external stimuli, and the desired effect is obtained. Therefore, in view of these aspects, development of skin care cosmetics which are further improved is expected.

The present invention relates to an oil-based emulsified cosmetic material which is excellent in stability, isolation effect and refreshing feeling to external stimuli.

The inventors have found that stable use of a specific polyoxyxene elastomer, a specific high-polymerized dimethylpolysiloxane, a specific low-polymerized polyoxyxene oil, and ethanol can be obtained in a specific ratio. In-oil water-based emulsified cosmetic which is excellent in the effect of isolation from external stimuli, good stretching during coating, no residual film feeling after application, and refreshing feeling.

The water-type emulsified cosmetic of the oil of the present invention is excellent in storage stability and isolation from external stimuli, and has good stretching during application, and has no residual feeling after application, and has a good touch and is excellent in refreshing feeling.

Hereinafter, each component used in the water-based emulsion cosmetic of the present invention will be described in detail.

Ingredient (A):

Component (A) is a polyoxyxene elastomer as described above.

Here, R ^{1 is} preferably a monovalent or heterocyclic substituted or unsubstituted alkyl group having 1 to 18 carbon atoms, preferably a methyl group or a lauryl group. In the above formula (a-3), m is preferably from 3 to 6, more preferably 3. Further, p is preferably 10 to 15, and q is preferably 0.

The component (A) and the component (B) described below have the following effects: when the water-based emulsion cosmetic of the present invention is applied to the skin, the coating is good, and after coating and drying, the residual feeling of the film is suppressed, and the composition is refreshed without stickiness. A greasy film. As a result, it is possible to block the stimulation from the outside and to exert a high isolation effect. Further, the component (A) has a self-emulsification ability and can stabilize the emulsion of the water-based emulsion cosmetic in the oil.

Specifically, as the component (A), (矽灵/(PEG-10/15)) crosslinked polymer, (PEG-15/laurylpyrene) crosslinked polymer, (PEG-10/) Lauryl ketone) cross-linked polymer and the like. These are usually commercially available in combination with other oils. For example, there are KSG-210, KSG-240, KSG-310, KSG-320, KSG-330, KSG-340 (KSG series, manufactured by Shin-Etsu Chemical Co., Ltd.) and the like.

Here, "KSG-210" is a mixture of 25% (矽 / / (PEG-10/15)) cross-linked polymer and 75% of 矽, "KSG-240" (矽灵 / (PEG-10/) 15)) a mixture of cross-linked polymer 20% and cyclopentaoxane 80%, "KSG-310" (PEG-15/lauryl quinone) cross-linked polymer 30% and mineral oil 70% mixture, "KSG-320" is a mixture of 25% crosslinked polymer and 75% of isododecane, and "KSG-330" (PEG-15/Laurylpyrazine) crosslinked. 20% mixture of polymer and triethylhexanoin (80%), "KSG-340" (PEG-10/lauryl quinone) cross-linked polymer and (PEG-15/lauryl hydrazine) A mixture of 30% polymer and 70% squalane.

The component (A) may be used in combination of one kind or two or more types. a sense of refreshment The content of the component (A) is 0.5% by mass or more, preferably 0.625% by mass or more, more preferably 0.75% by mass or more, and preferably 10% by mass or less, preferably 10% by mass or less, based on the total stability of the component. 5 mass% or less, more preferably 2.5% by mass or less. Further, the content of the component (A) is from 0.5 to 10% by mass, preferably from 0.625 to 5% by mass, more preferably from 0.75 to 2.5% by mass, based on the total composition.

Ingredient (B):

Component (B) is a dimethyl polyoxyalkylene having a degree of polymerization of from 350 to 1,500.

The component (B) and the component (A) form a soft film on the surface of the skin, and are important for forming a natural film after drying. As a result, it is beneficial to enhance the isolation effect of external stimuli.

The degree of polymerization of the dimethylpolysiloxane of the component (B) is 350 or more, preferably 600 or more, from the viewpoint of film formation and barrier effect. Further, the degree of polymerization is 1,500 or less, preferably 800 or less.

Here, the degree of polymerization is obtained by dividing the molecular weight of dimethylpolysiloxane by 74.

The dimethyl polyoxyalkylene having a polymerization degree of the component (B) of from 350 to 1,500 is exemplified by KF-96A-1000 cs, KF-96A-5000 cs, and KF-96A-10000. Commercial products such as cs, KF-96A-100000 cs (manufactured by Shin-Etsu Chemical Co., Ltd.).

The component (B) may be used singly or in combination of two or more kinds, and the content is 0.2% by mass or more, preferably 0.5% by mass or more, and more preferably 1% by mass from the viewpoint of the isolation effect and the refreshing feeling. % or more is 10% by mass or less, preferably 5% by mass or less, and more preferably 3% by mass or less. Also, component (B) The content is 0.2 to 10% by mass, preferably 0.5 to 5% by mass, and more preferably 1 to 3% by mass in the total composition.

Ingredient (C):

The component (C) is a dimethylpolysiloxane having a degree of polymerization of 1 or more and 6 or less and/or decamethylcyclopentaoxane.

In the oil-type emulsified cosmetic of the oil of the present invention, the component (C) acts as a plasticizer for the component (A) and the component (B), and the mixture of the component (A) and the component (B) can be improved, and It spreads well during coating and spreads evenly on the skin surface. As a result, a more excellent film is formed, and the isolation effect against external stimuli is further improved.

The dimethylpolysiloxane having a polymerization degree of the component (C) of 1 or more and 6 or less is specifically dimethylpolysiloxane (viscosity 1 cs) and dimethyl polyoxyalkylene ( Viscosity 2 cs), decamethylcyclopentaoxane, and the like.

The component (C) may be used alone or in combination of two or more.

The content of the component (C) is 3% by mass or more, preferably 8% by mass or more, and 28% by mass or less, preferably 18%, based on the total ease of the coating and the storage stability. The mass% or less is more preferably 14% by mass or less. Further, the content of the component (C) is from 3 to 28% by mass, preferably from 8 to 18% by mass, more preferably from 8 to 14% by mass, based on the total composition.

In the oil-type emulsified cosmetic of the oil of the present invention, the content of the component (A) and the component (A), the component (B) and the component (C) are from the viewpoints of emulsion stability, film formation, and good ductility. The mass ratio (A) / ((A) + (B) + (C)) of the total content is preferably 0.03 or more, more preferably 0.04 or more, further preferably 0.06 or more, preferably 0.27 or less, more preferably It is 0.14 or less.

Ingredient (D):

Ingredient (D) is ethanol. The water-based emulsified cosmetic in the oil of the present invention functions as a solvent, contributes to good ductility during coating, and improves storage stability of the system. In particular, when an oil component which is not mixed with the components (A) and (B), such as a UV-defense agent of the following component (H), is blended, the separation of the oil can be suppressed by the component (D).

The content of the component (D) is 0.5% by mass or more, preferably 1% by mass or more, more preferably 3% by mass or more, and 25% by mass or less, and preferably 25% by mass or less, in terms of storage stability. 20% by mass or less, more preferably 15% by mass or less. Further, the content of the component (D) is from 0.5 to 25% by mass, preferably from 1 to 20% by mass, more preferably from 3 to 15% by mass, based on the total composition.

Ingredient (E):

Ingredient (E) is water. The oil-type emulsified cosmetic in the oil of the present invention can stably contain a large amount of water in the cosmetic. As a result, the skin surface is imparted with a non-sticky feeling and a light touch when applied. Further, since the water-based emulsified cosmetic of the oil of the present invention can form a film having a high barrier property, the water can be retained in the skin even after a long period of time, and the skin can be rendered refreshed after application.

The content of water in the component (E) is preferably 30% by mass or more, more preferably 40% by mass or more, and still more preferably 50% by mass or more, in terms of the refreshing feeling and the storage stability. Further, it is preferably 90% by mass or less, and more preferably 85% by mass or less.

Ingredient (F):

The water-type emulsified cosmetic in the oil of the present invention may further contain (F) HLB not up to 8 A surfactant comprising a polyoxyl chain.

The component (F) contributes to the improvement of the stability of the water-based emulsified cosmetic in the oil of the present invention. When the emulsified cosmetic of the present invention is produced, the long-term storage stability of the emulsified cosmetic is improved by uniformly refining the particle diameter of the emulsified cosmetic, and therefore, it is stirred by a homomixer. In the case where the component (F) is contained, separation does not occur even if a strong shear force such as a homomixer is applied.

In order to stabilize the emulsion of the water type in the oil, the surfactant of the component (F) is preferably one having an HLB of less than 8, more preferably an HLB of 3 to 5.

Here, HLB (Hydrophilic-Lypophilic Balance) indicates that the molecular weight of the hydrophilic group portion accounts for the total molecular weight of the surfactant, and can be determined by the following formula.

HLB=7+11.7log(Mw/Mo)‧‧‧(I)

In the formula (I), Mw represents the molecular weight of the hydrophilic base, and Mo represents the molecular weight of the lipophilic base.

In the present invention, polyoxo oxide is the main component in the oil phase, and therefore, the surfactant of the component (F) can preferably be used as a polymerized polymer. Specific examples include PEG-3 hydrazine (HLB 4.5), PEG-10 hydrazine (HLB 4.5), PEG-12 hydrazine (HLB 6.0), and PEG-9 polydimethyl decane oxyethyl oxime (HLB 4.0), lauryl PEG-9 polydimethyl decane oxyethyl hydrazine (HLB 3.0), and the like. Among these, PEG-3, PEG-10, and PEG-12, preferably PEG-10, are preferred.

The surfactant of the component (F) may be used in combination of one or more kinds of surfactants. From the point of view of the sense of use and stability during preparation In the total composition, the content of the component (F) is preferably 0.1% by mass or more, more preferably 0.33% by mass or more, and still more preferably 0.66% by mass or more. Moreover, it is preferably 3% by mass or less, more preferably 2.5% by mass or less, still more preferably 2% by mass or less.

Ingredient (G):

The oil-type emulsified cosmetic of the oil of the present invention may further contain (G) an inorganic salt. Further, the water-type emulsified cosmetic in the oil of the present invention further contains an inorganic salt of the component (G), whereby the change in viscosity with time can be suppressed.

Specific examples of the inorganic salt of the component (G) include chlorides such as sodium chloride, potassium chloride, calcium chloride, and magnesium chloride; sulfates such as sodium sulfate, potassium sulfate, magnesium sulfate, and aluminum sulfate; and sodium carbonate. a carbonate such as sodium hydrogencarbonate; potassium hydroxide or the like. It is preferably sodium chloride, calcium chloride, magnesium sulfate or potassium hydroxide, more preferably magnesium sulfate.

The inorganic salts of the component (G) may be used alone or in combination of one or more. The content of the component (G) is preferably 0.1% by mass or more, more preferably 0.33% by mass or more, and still more preferably 0.66 or more in terms of the total viscosity of the component. Further, it is preferably 3% by mass or less, and more preferably 2% by mass or less.

Ingredient (H):

Further, the oil-based emulsified cosmetic of the present invention may contain (H) an ultraviolet defense agent. Further, the water-based emulsified cosmetic of the oil of the present invention further contains the ultraviolet ray inhibitor of the component (H), whereby the composition can be further improved in the formation of the film containing the components (A), (B) and (C). H) UV protection effect.

The ultraviolet protection agent of the component (H) contains an ultraviolet absorber and an ultraviolet scattering agent.

Specific examples of the ultraviolet absorber include benzyl p-methoxycinnamate, 2-ethylhexyl p-methoxycinnamate, 2-ethoxyethyl p-methoxycinnamate, and di-pairs. A cinnamic acid-based ultraviolet absorber such as oxycinnamic acid mono-2-ethylhexanoic acid glyceride, p-methoxy cinnamic acid isopropyl ester/diisopropyl cinnamate mixture; hydroxymethoxybenzophenone; p-Aminobenzoic acid, ethyl p-aminobenzoate, p-aminobenzoic acid, amyl p-dimethylaminobenzoate, p-octyl p-dimethylaminobenzoate, 4-[N,N Benzoic acid-based ultraviolet absorption of ethyl bis(2-hydroxypropyl)amino]benzoate and 2-[4-(diethylamino)-2-hydroxybenzhydryl]benzoic acid hexyl ester Ethylene glycol salicylate, phenyl salicylate, octyl salicylate, benzyl salicylate, salicylic acid, tert-butylphenyl ester, salicylic acid Absorbent; 2,4,6-triphenylamino-p-(carbonyl-2'-ethylhexyl-1'-oxy)-1,3,5-three Wait three It is an oil-soluble organic UV absorber such as a UV absorber.

Specific examples of the ultraviolet ray scattering agent include metal oxides such as low-valent titanium oxide, zinc oxide, and cerium oxide, metal hydroxides such as iron hydroxide, metal sheets such as plate-shaped iron oxide and aluminum sheets, and tantalum carbide. Powders such as ceramics. Preferably, the powders are surface treated by conventionally known surface treatments, for example, fluorine compound treatment (preferably perfluoroalkyl phosphate treatment or perfluoroalkyl decane treatment, perfluoropolyether treatment, fluoropolymerization). Oxygen treatment, fluorinated polyoxyl resin treatment), polyoxane treatment (preferably methyl hydrogen polyoxyalkylene treatment, dimethyl polyoxyalkylene treatment, gas phase tetramethyltetrahydrocyclotetrasiloxane) Alkane treatment), polyoxymethylene resin treatment (preferably trimethyl decyloxy decanoic acid) , side chain treatment (method of addition of alkyl chain after gas phase polymerization, decane coupling agent, titanium coupling agent treatment, decane treatment (preferably alkyl decane or alkyl decazane) Treatment), oil treatment, N-deuterated lysine treatment, polyacrylic acid treatment, metal soap treatment (preferably stearic acid or myristate), acrylic resin treatment, metal oxide treatment, etc.; Jia uses a combination of these kinds of treatments. For example, after coating the surface of the fine particle titanium oxide with a metal oxide such as decane or alumina, surface treatment with alkyl decane is carried out. Further, it is preferable that the powder having the ultraviolet ray-protecting effect is subjected to water repellency treatment with an organic hydrazine compound. Examples of the organic ruthenium compound include a decane coupling agent, a polyfluorene oxide resin, and the like.

Among these, as the ultraviolet absorber, 2-ethylhexyl p-methoxycinnamate and 2-hexyl 2-[4-(diethylamino)-2-hydroxybenzimidyl]benzoate are preferred. As the ultraviolet ray scattering agent, titanium oxide, polyoxynitride-treated zinc oxide, methylhydrogenpolysiloxane treatment or octyldecane-treated titanium oxide and zinc oxide are preferred.

The ultraviolet ray-protecting agent of the component (H) may be used in combination of one or more of a plurality of kinds. The content of the ultraviolet ray inhibitor of the component (H) is preferably 20% by mass or less, more preferably 10% by mass or less, still more preferably 8% by mass or less, based on the total composition.

Other ingredients:

In addition to the above components (A) to (H), the water-based emulsified cosmetic of the present invention may contain an oily component to adjust the touch of the skin and improve the storage stability of the cosmetic material, unless it affects the effects of the present invention. .

Examples of the oily component include mineral oil, vegetable oil, ester oil, low-viscosity polyoxygenated oil other than the components (B) and (C), and vitamin E. Specific examples of the mineral oil include liquid paraffin, dodecane, polybutene, and polyisobutylene. Specific examples of the vegetable oil include rapeseed oil, linseed oil, cottonseed oil, soybean oil, and tea seed oil. Rice bran oil, tung oil, etc., as a specific example of the low-viscosity polyoxo-oxygen oil, a dimethylpolyphthalic acid oil having a viscosity of 6 cs (Silicone KF-96A-6 cs, manufactured by Shin-Etsu Chemical Co., Ltd.), /vinyl oxime) crosslinked polymer (25% 矽 6 6 cs dispersion) (KSG-16, manufactured by Shin-Etsu Chemical Co., Ltd.) and the like.

Further, various other optional components used in cosmetics, pharmaceuticals, and the like may be blended depending on the purpose without affecting the effects of the present invention. For example, humectants, powders, thickeners, tackifiers, other surfactants, emulsifiers, anti-inflammatory agents, antioxidants, pH adjusters, chelating agents, preservatives, colors, flavors, collagen, and the like.

The form of the product of the water-type emulsified cosmetic in the oil of the present invention may, for example, be a gel, an emulsion, a cream, an ointment or the like.

In the case of using the water-type emulsified cosmetic of the oil of the present invention for skin care, the water-type emulsified cosmetic in the oil of the present invention may be used for the skin. Further, when the water-based emulsified cosmetic of the present invention is used for the skin, the emulsified cosmetic is immediately emulsified to form a non-sticky, refreshing film on the surface of the skin, thereby effectively exerting an isolation effect on external stimuli. .

[Examples] Example 1 and Comparative Examples 1-8

Example 1 and ratio of the composition shown in Table 2 were produced according to the following manufacturing method The oil-type emulsified cosmetic in the oil of the examples 1 to 8 was evaluated for the isolation effect to the external stimuli, the storage stability, the good spreadability at the time of coating, the touch feeling after application drying, and the refreshing feeling. The results are shown in Table 1.

(Production method)

The components (A) to (D) are referred to as a first phase (oil phase) component, and the component (E) is referred to as a second phase (aqueous phase) component. The components of the first phase were uniformly mixed by propeller stirring (500 rpm) at room temperature in the amounts shown in Table 2, and the second phase dissolved and mixed was slowly added under stirring to emulsify to prepare a water-type emulsified cosmetic in oil. 300 g.

(evaluation method and benchmark)

Based on the following methods and criteria, the water-based emulsified cosmetic in the oil was evaluated for its isolation from external stimuli, storage stability, good spreadability at the time of coating, and a feeling of refreshing after application and drying.

(I) Evaluation of the isolation effect on external stimuli:

Regarding the isolation effect on external stimuli, the adhesion angle, the obstructiveness, and the adhesion measurement of the dirt were used for evaluation. The specific evaluation method is as follows.

(A) Contact angle:

(1) Prepare artificial leather (SUPPLALE/Imlight Co., Ltd.) with an area of 5 cm × 4 cm.

(2) 0.04 mL of the above-mentioned artificial leather was uniformly coated and dried indoors for one night.

(3) Set the above artificial leather horizontally. The camera is then placed on the horizontal line of the artificial leather and the height and distance of the camera are adjusted so that the horizontal surface of the dried sample on the artificial leather can be photographed.

(4) Using a micro-syringe, 5 μL of pure water (water droplets) was slowly added to the surface of the dried sample of artificial leather by slowly contacting the coated surface.

(5) After standing for 5 minutes, take a photo.

(6) Based on the photograph of the obtained water droplet, the contact angle θ was calculated using the following formula.

The larger the contact angle, the lower the wettability, and the more difficult the external stimulus component to expand, the higher the isolation effect.

(B) Obstructive:

The obstruction measurement was carried out by a cylindrical plate method. That is, a 40 mL vial (Pierce Vial CV-400 (manufactured by As One) was covered with a hole having a diameter of 17.3 mm) and a glass fiber filter paper (Whatman GF/C) of Φ=22.0 mm was placed in the bottle. On, cover. 0.05 g of the emulsified cosmetic was applied to the exposed filter paper portion, and dried for 1 day and night. Thereafter, 25 mL of water was added, and after standing at 20 ° C and a humidity of 40% for 3 days (the state in which the mass of the sample was not changed), the mass (M1) was measured, and the mass (M2) after 24 hours was measured. The amount of water evapotranspiration was determined by the following formula.

Water evapotranspiration (g) = M1-M2

In addition, a placebo (water) was used instead of the emulsified cosmetic, and the amount of moisture evapotranspiration was determined in the same manner as above, and the obstruction (%) was obtained by the following formula. The higher the obstruction, the higher the uniform film formation ability, which means the greater the isolation effect on external stimuli.

Obstructiveness (%) = [1 - (Emulsified cosmetic moisture evapotranspiration / placebo treatment) Water evapotranspiration)]×100

(C) Determination of adhesion of dirt:

Using coal as a sample of atmospheric pollutants, the dirt chamber was used to study adhesion.

(1) Prepare white artificial leather of 5 cm × 4 cm (SUPPLALE, manufactured by Idemitsu Co., Ltd.).

(2) Uniform coating of 0.02 g of sample sebum (sample sebum composition is as described in Table 1).

(3) 0.04 mL of the cosmetic was uniformly applied to the entire artificial leather.

(4) Dry overnight.

(5) The L*a*b* value was measured by a color difference meter (D-2500d, manufactured by Olympus Co., Ltd.).

(6) Prepare a dirt chamber (65 × 40 × 40 cm box type / fan for circulation (manufactured by Kao Corporation)) (Fig. 1).

(7) In the indoor center, artificial leather coated with a cosmetic material is provided in accordance with the height of the exhaust port.

(8) A filter paper impregnated with kerosene (Φ=22.0 mm glass fiber filter paper (Whatman GF/C)) was placed in the combustion chamber and ignited.

(9) The fan is used to circulate the smoke, and after being placed for 5 minutes, the artificial leather is taken out.

(10) Repeat this operation 5 times.

(11) The sample was taken out after (10), and the L*a*b* value was measured by a color difference meter to obtain ΔE.

The smaller the ΔE, the greater the adhesion inhibition effect of the dirt, which means that the isolation effect to external stimuli is greater.

(II) Evaluation of preservation stability:

Each cosmetic was placed in a glass bottle (height 9.5 cm, inner diameter 4.5 cm), and stored at 50 ° C for 1 month, 1 day, 2 weeks, 40 ° C to -30 ° C for 2 weeks, and the sample was visually observed. The state was evaluated based on the following criteria.

(evaluation benchmark)

◎: No change.

○: A slight change, but no delamination, forming a product without problems.

△: Slightly layered.

×: Completely layered.

(III) Evaluation of the good ductility at the time of coating, the feeling of touch after coating and drying, and the refreshing feeling:

Ten professional inspectors applied 0.2 g of each cosmetic to the face and held it. According to the following criteria (1), (2), and (3), the ductility at the time of coating, the touch after drying, and the refreshing feeling were evaluated. According to the evaluation of 10 professional inspectors, the average score was calculated, and 3.6 or more was recorded as ◎, 2.6~not Up to 3.6 is recorded as ○, 1.6~ is less than 2.6 and △ is recorded, and less than 1.6 is recorded as ×.

Evaluation criteria (1)

4: Very easy to extend.

3: Easy to extend.

2: A little easier to stretch.

1: It is difficult to extend.

Evaluation basis (2)

4: Complete no film residual feeling.

3: There is almost no residual feeling of film.

2: A slight residual feeling of the film.

1: There is a residual feeling of the film.

Evaluation criteria (3)

4: Very refreshing.

3: Refreshing.

2: Slightly refreshing.

1: Not refreshing.

According to the results of Table 2, it is understood that the water-based emulsified cosmetic of the present invention has excellent results in any of the items of contact angle, obstruction, and dirt adhesion measurement as compared with Comparative Examples 1 to 8. The external stimulus has excellent isolation effect, and is easy to spread during coating. The coating after drying is excellent in touch, and can also achieve storage stability and refreshing feeling at the same time.

Example 2~8

According to the production method of Example 1, the oil-type emulsified cosmetic of Examples 2 to 8 of the composition shown in Table 3 was produced by a homomixer under stirring conditions of 4000 rpm, 7000 rpm, and 10000 rpm. The rate of change in aqueous phase separation and viscosity over time after production was evaluated. The results are shown in Table 3.

(evaluation method and benchmark)

Based on the following methods and criteria, the water phase separation and the change rate with time viscosity after the production of the water-based emulsified cosmetic in the oil were evaluated.

(IV) Water phase separation after manufacture (after stirring shearing):

The cosmetics are stirred by a propeller/homogeneous mixer to produce a cosmetic. The state of the cosmetic after the production was visually observed and evaluated based on the following criteria.

(evaluation benchmark)

○: Not separated.

×: Separation.

(V) Change in viscosity over time after manufacture:

Put the cosmetic material shortly after manufacture into a glass bottle (height 9.5 cm, inner diameter 4.5 cm), and use a B-type viscometer (manufactured by Toki Sangyo Co., Ltd., BM type or TV-10 type) at 6 rpm at 25 °C. The speed is measured by the viscosity. Put the makeup on After storage for one month at room temperature, the viscosity was measured again under the same conditions as above, and the rate of change in viscosity over time was determined by the following formula. The further the rate of change is from 1 means that the change in viscosity over time is greater.

Viscosity change rate over time = viscosity after preparation / viscosity after storage for 1 month at room temperature

According to the results of Table 3, in the water-based emulsion cosmetic of the present invention, if the HLB of the component (F) is less than 8 and the surfactant containing the polyoxyl chain, the homomixer can be suppressed. When the aqueous phase is separated, if the inorganic salt of the component (G) is further blended, the change in viscosity with time can be suppressed.

Examples 9 to 11 and Comparative Examples 9 to 11

According to the manufacturing method of Table 1, the water-based emulsion cosmetic materials of Examples 9 to 11 and Comparative Examples 9 to 11 of the compositions shown in Table 4 were produced, and the SPF (Sun Protection Factor) value of each cosmetic was measured. . The results are shown in Table 4.

(test methods)

The SPF value of the water-type emulsified cosmetic in the oil was determined based on the following method.

Each of the cosmetic materials was uniformly applied to a medical tape on a quartz glass plate at a rate of 2 mg/cm ² , and allowed to stand for 20 minutes or more, and then dried, and then the SPF value of the cosmetic was measured using an SPF analyzer (Optometrics).

According to the results of Table 4, the water-type emulsified cosmetic of the oil of the present invention can form an excellent film and obtain a further excellent ultraviolet ray-preventing effect.

Example 12~30

According to the manufacturing method of Table 1, the oil-type emulsified cosmetic of Examples 12 to 27 of the composition shown in Table 5 and Example 28 (moisturizing cosmetic liquid), Example 29 (sunscreen), and Example 30 (BB) were produced. Frost).

The oil-in-water emulsion paint obtained in each of Examples 12 to 30 has good storage stability, good touch feeling upon application or after application, and has a refreshing feeling, and is excellent in isolation from external stimuli.

Fig. 1 is a view showing a dirt chamber for adhesion measurement of dirt in the examples.

Claims (10)

An oil-type water-based emulsified cosmetic containing the following components (A) to (E): (A) a polyxanthene oxide elastomer in an amount of 0.5 to 10% by mass, and the polyfluorene oxide elastic system gives the following formula (a- 1) and/or an organohydrogenated polyoxyalkylene represented by the following formula (a-2), a polyoxyalkylene group represented by the following formula (a-3), and/or the following formula (a-4) obtained by addition polymerization of organopolyoxyalkylene: R ¹ _a R ² _b H _c SiO _(4-abc)/2 (a-1) R ¹ _j H _k SiO _{(4-jk )/2} (a-2) C _m H _2m-1 O(C ₂ H ₄ O) _p (C ₃ H ₆ O) _q C _m H _2m-1 (a-3) R ¹ _d R ³ _e SiO _{( 4-de)/2} (a-4) wherein the component represented by the above formula (a-1) and/or the above formula (a-3) is an essential component (wherein R ¹ is the same species or A substituted or unsubstituted alkyl or aryl, aralkyl or halogenated hydrocarbon group having 1 to 18 carbon atoms, R ² is a formula -C _n H _2n O(C ₂ H ₄ O) _f (C ₃ H ₆ O) _g R ⁴ represents an organic group, the R ³ terminal has a hydrocarbon group having a carbon number of 2 to 10, and a R ⁴ hydrogen atom or a saturated organic group having a carbon number of 1 to 10. a group represented by R ⁵ -(CO)-, R ⁵ is a saturated organic group having 1 to 5 carbon atoms, and a, b, c, d, e, j, and k are respectively 1.0≦a≦2.5, 0.001≦b≦1, 0.001≦c≦1, 1.0≦d≦3.0, 0.001≦e≦1.5, 1.0≦j≦3.0 and 0.001≦k≦1.5, f and p are 2~200 The integer, g and q are integers from 0 to 200, f+g is 3 to 200, p+q is 3 to 200, m and n are 2 to 6) (B) polymerization degree is 350 or more and 1500 or less. Polyoxymethane of 0.2 to 10% by mass, (C) dimethylpolysiloxane having a degree of polymerization of 1 or more and 6 or less and 3 to 28% by mass of decamethylcyclopentaoxane, (D) ethanol 0.5 to 25% by mass, (E) water. The mass ratio of the content of the component (A) to the total content of the component (A), the component (B) and the component (C) in the oil-based emulsified cosmetic of claim 1 (A)/((A)+ (B) + (C)) is 0.03 to 0.27. The oil-type emulsified cosmetic of claim 1, wherein the poly(oxyoxy) elastic system of the component (A) is selected from the group consisting of (矽灵/(PEG-10/15)) crosslinked polymer and (PEG-15/Lauryl)矽灵) cross-linked polymer. The oil-type emulsified cosmetic according to claim 1, wherein the degree of polymerization of the dimethylpolysiloxane of the component (B) is 600 or more and 1,500 or less. The oil-type emulsified cosmetic of claim 1, wherein the degree of polymerization of the dimethylpolysiloxane of the component (B) is 600 or more and 800 or less. The water-based emulsified cosmetic according to claim 1, wherein the content of the component (E) in the water-based emulsified cosmetic is 30 to 90% by mass. The oil-type emulsified cosmetic of claim 1 further comprising (F) a surfactant comprising a polyoxyl chain having an HLB value of less than 8. The oil-type emulsified cosmetic of claim 1 further comprising (G) an inorganic salt. The oil-type emulsified cosmetic of claim 1 further comprising (H) a UV-blocking agent. A skin care method characterized by using an oil-type emulsified cosmetic in an oil as claimed in claim 1.