JP2001342113A - Solution for beauty - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a solution for beauty which can formulate an oil component in a large quantity while holding the transparency and give the touch peculiar to the oil component, e.g. moistness or the like, on use. SOLUTION: This solution for beauty which contains the oil components as an emulsion particle with an average particle diameter of 0.02-1.0 μm, shows transparent external appearance and has a viscosity of 200-100,000 mPa/s is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cosmetic liquid having a transparent appearance and viscous liquid properties, and providing an oily feeling upon use.

[0002]

2. Description of the Related Art Oily components incorporated in basic cosmetics such as lotions and serums not only improve the feel, but also act as a sebum film and play an important role in moisturizing the skin. Cosmetics containing a large amount of an oily component in an aqueous medium generally become milky lotions and creams having a cloudy appearance. Cosmetics with an opaque appearance have a strong oily image and tend to be unacceptably accepted by those who do not like oiliness. On the other hand, aqueous cosmetics with a transparent appearance are limited to lotions containing a small amount of oily components solubilized in surfactant micelles and gel-like cosmetics using water-soluble thickeners. The skin care effect of the ingredients is poor, and the feeling such as moist feeling and the feeling of use are not sufficient.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a serum which can contain a large amount of an oily component and has a transparent appearance.

[0004]

Means for Solving the Problems The present inventor has proposed that a cosmetic liquid having a specific viscosity of a fine emulsified emulsion has a transparent appearance while containing a large amount of an oily component and has a moist feeling and other oily feeling. It was found that it could be obtained.

The present invention contains an oily component as emulsified particles, the average particle size of the emulsified particles is 0.02 to 1.0 μm, the appearance is transparent, and the viscosity is 200 to 100,000.
It is intended to provide a serum having a mPa · s.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The viscosity of a serum according to the present invention is as follows.
It was measured using a B-type rotational viscometer (rotor No. 1 to 4, rotational speed 6 rpm) at 25 ° C., and 200 to 1000
00 mPa · s, preferably 1000 to 40000 mP
a · s, particularly preferably 2000 to 30000 mPa · s.

In order to achieve such a viscosity, it is preferable to use a water-soluble polymer compound (synthetic or natural product) as a compounding component of the serum, and a predetermined viscosity is obtained depending on its type, compounding amount and degree of neutralization. Adjusted.

The water-soluble synthetic polymer includes polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer, polyacrylamide, polyvinylpyrrolidone, polyvinyl methyl ether, polyvinyl sulfone,
Maleic acid copolymer, polyethylene oxide, polydiallylamine, polyethyleneimine, water-soluble cellulose derivatives (eg, carboxymethylcellulose, methylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, sodium cellulose sulfate, etc.), starch derivatives (eg, , Oxidized starch, dialdehyde starch, dextrin, British gum, acetyl starch, phosphate phosphate, carboxymethyl starch, hydroxyethyl starch, hydroxypropyl starch and the like.

[0009] Water-soluble natural polymers include gum arabic, tragacanth gum, karaya gum, guar gum, tara gum, locust bean gum, tamarind gum, sodium alginate, propylene glycol alginate, carrageenan, furcellulan, agar, high methoxy pectin, ro Methoxy pectin, chitin, chitosan, starch (for example, starch derived from corn, potato, wheat, rice, sweet potato, tapioca, etc., α starch, soluble starch, etc.), and fermentation polysaccharides (for example, xanthan gum, pullulan, curdlan, dextran) And the like (eg, sodium caseinate, gelatin, albumin, etc.), chondroitin sulfate, hyaluronic acid, and the like.

[0010] These water-soluble polymer compounds are, for example, 6
An aqueous gel can be formed by adding to a water phase heated to 0 ° C. with stirring and dissolving the mixture, allowing it to cool to around room temperature, and then adding a neutralizing agent as needed. The content in the cosmetic solution of the present invention is usually 0.01 to 30% by weight (hereinafter simply referred to as%), but varies depending on the type of each polymer compound and the degree of neutralization, and the viscosity of the compound falls within the above range. Is selected as appropriate.

In the present invention, the oil component is mainly used as fine emulsified particles. The average particle size of the emulsified particles in the emulsion is 0.02 to 1.0 μm (laser diffraction /
Scattering method), preferably from 0.03 to 0.
5 μm, especially 0.05 to 0.3 μm.

[0012] Such a finely emulsified emulsion is prepared by adding an oily component together with a surfactant and water under high shearing force, for example, 10
^An emulsifier (for example, a high-pressure homogenizer) capable of obtaining a shear rate of ⁴ s ⁻¹ or more, preferably 10 ⁴ to 10 ⁸ s ⁻¹ , particularly preferably 10 ⁷ to 10 ⁸ s ⁻¹ , or emulsification using ultrasonic waves It is manufactured by emulsifying with a machine. Further, it can also be produced by utilizing surface chemical properties such as those prepared by raising the temperature of the system once to the solubilization limit temperature of the system or higher and then cooling.

When emulsifying with a high-pressure homogenizer, 2
It is performed at 0 ° C. at 10 ⁵ s ⁻¹ or more, preferably 10 ⁷ to 10 ⁸ s ⁻¹ . Such a high shearing force can be obtained by using a high-pressure emulsifier such as Fillmix (manufactured by Tokushu Kika), Clearmix (manufactured by M-Technic), Microfluidizer (Mi
crofluidics), DeBEE2000 (BE
E. FIG. International Corporation).

For example, when the injection pressure is 300 to 3000 kg /
cm ² , by setting the temperature in the range of 5-50 ° C.
A fine emulsified emulsion can be obtained. However, the above operating conditions such as pressure and temperature are different depending on the specifications of the apparatus, and are not particularly limited. In addition, an emulsion having fine emulsified particles having a desired particle size can be obtained by subjecting the preliminary emulsion obtained by a usual emulsification method to the same high shearing force treatment. Moreover, you may repeat this high shearing force process as needed. Furthermore, an emulsion having a high concentration of an oil component can be produced and then diluted with water or an aqueous medium to obtain an emulsion having a desired concentration.

[0015] The oil component used in the present invention is 5 to 85 ° C.
Liquid is preferable in terms of ease of compounding.
The liquid, semi-solid (paste), and solid materials are used in combination at an appropriate temperature.

The oily components liquid at 25 ° C. include liquid paraffin, squalane, n-octane, n-heptane,
Hydrocarbon oils such as cyclohexane; dioctyl ether;
Ether oils such as ethylene glycol monolauryl ether, ethylene glycol dioctyl ether and glycerol monooleyl ether; octyl dodecyl myristate, isopropyl palmitate, butyl stearate, myristyl myristate, isopropyl myristate, di-2-ethylhexyl adipate, sebatine Diisopropyl acid, neopentyl glycol dicaprate,
Ester oils such as tricaproin; saturated higher alcohols such as isostearyl alcohol and octyldodecanol;
Unsaturated higher alcohols such as oleyl alcohol and lanolin alcohol; higher fatty acids such as eicosenoic acid, isomyristic acid and capric acid; higher fatty acid amides such as lauroyl laurylamine and lauric acid butylamide; fats and oils such as olive oil, soybean oil and cottonseed oil; Silicone oils such as polysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, amino-modified silicone, epoxy-modified silicone, carboxy-modified silicone, alcohol-modified silicone, alkyl-modified silicone, polyether-modified silicone, and fluorine-modified silicone;
Fluorinated oils such as perfluoroalkylethyl phosphoric acid, perfluoroalkylpolyoxyethylene phosphoric acid, perfluoropolyether, and polytetrafluoroethylene, and the like.

Particularly preferred are liquid paraffin, squalane, neopentyl glycol dicaprate, ethylene glycol monolauryl ether, perfluoropolyether and dimethylpolysiloxane. These oily components are 2
A combination of more than one species may be used.

Further, the solid or semi-solid (paste-like) oil component at 25 ° C. includes aliphatic alcohols, fatty acids,
Examples thereof include an aliphatic amide derivative and an aliphatic amine derivative. As the aliphatic alcohol, a saturated aliphatic alcohol having 12 to 24 carbon atoms such as lauryl alcohol, myristyl alcohol, cetanol, stearyl alcohol, and behenyl alcohol is preferable. As the fatty acid, a saturated fatty acid having 12 to 24 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, and behenic acid is preferable. Examples of the aliphatic amide derivatives include natural racemics of types I to VI, N- (2-hydroxy-3-hexadecyloxypropyl) -N-2-hydroxyethylhexadecanamide, and N- (2-hydroxy-3 Ceramides such as -hexadecyloxypropyl) -N-2-hydroxyethyldecanamide and the like are preferable. Examples of the aliphatic amine derivatives include sphingosine, dihydrosphingosine, phytosphingosine, dehydrosphingosine,
Dehydrophytosphingosine, sphingdienin and sphingosines such as N-methyl form or N, N-dimethyl form thereof, 1- (2-hydroxyethylamino)
-3-isostearyloxy-2-propanol and the like are preferred. Also, cholesterol, cholesterol sulfate,
Sterols such as polyoxyethylene cholesterol, stigmasterol and ergosterol are also used.

In the finely emulsified emulsion, the oily component contains 2
More than one species may be used, 0.1-80%, especially 1-70
%.

In the fine emulsified emulsion, water is 10 to 9
It is preferred to mix 9.9%, especially 25 to 99.5%.

The surfactant used for producing the fine emulsified emulsion is preferably a hydrophilic surfactant,
It is selected from an anionic surfactant, a cationic surfactant, an amphoteric surfactant and a nonionic surfactant having an HLB of 9 or more. As a hydrophobic group, an alkyl group having 10 to 24 carbon atoms, preferably 12 to 18 carbon atoms. Or those having an alkenyl group. Here, the hydrophilic surfactant means an oil-in-water type (O / O) when a surfactant, an oil component, and water are mixed.
W) Refers to a surfactant capable of forming an emulsion.

The essence of the present invention is produced, for example, by dropping a fine emulsified emulsion into an aqueous gel containing a water-soluble polymer while stirring. The mixing ratio of the aqueous gel and the fine emulsion is 1: 100 to 99: 1, preferably 1: 9, by weight.
It is preferable to carry out at a ratio of 9 to 99: 1, especially 1: 9 to 9: 1 from the viewpoint of easy production.

The serum of the present invention contains 0.1 to 10 oily components.
70%, preferably 0.5 to 60%, particularly preferably 1 to 50% is contained in order to sufficiently exert the effect of the oily component.

The cosmetic liquid of the present invention is composed of a fine emulsified emulsion in which an oil component is finely emulsified and an aqueous gel containing a water-soluble polymer compound. It is transparent. Here, transparent means
Transmittance of light at a wavelength of 550 nm of an absorptiometer (cell length 1 cm)
Means 50% or more, preferably 60% or more.

The essence of the present invention is used as essences, gel cosmetics, hair tonics, hair lotions, aftershave lotions, body lotions, cosmetics, cleansing lotions, bath salts and the like.

[0026]

Example 1 An aqueous gel and a fine emulsion were produced by the following method. (1) 0.8% of aqueous gel carbopol 981 (carboxyvinyl polymer manufactured by BF Goodrich) was dropped and mixed in water at 25 ° C. with stirring with a propeller (200 rpm).
Neutralize with 32% and bring the total to 100% with purified water. Viscosity 30,000 mPa · s. (2) Fine emulsified emulsion (1) Liquid paraffin 5%, N-stearoyl-L-monosodium glutamate 1%, glycerin 10%, purified water 8
4% was stirred and mixed (80 ° C) to obtain a preliminary emulsion,
After cooling to 25 ° C, the microfluidizer (Micr
(a product of ofluidics) at a shearing force of 1750 kg / cm ² to obtain a fine emulsion having an average particle diameter of 0.05 μm. Viscosity 20 mPa · s. Fine emulsified emulsion (2) Liquid paraffin 5%, N-stearoyl-L-monosodium glutamate 1%, glycerin 10%, purified water 8
4% was emulsified at 80 ° C. while stirring with a propeller (500 rpm) and cooled to 25 ° C. to obtain a fine emulsion having an average particle size of 2 μm.

Using the produced aqueous gel and the fine emulsified emulsion, a cosmetic liquid in the form of a gel cosmetic was produced.

Inventive product 1 1 part by weight of the fine emulsion (1) was added to 1 part by weight of the aqueous gel while stirring with a propeller (200 rpm).

Comparative product 1 1 part by weight of the fine emulsion (2) was added to 1 part by weight of the aqueous gel while stirring with a propeller (200 rpm).

Comparative Product 2 To 97.5 parts by weight of the aqueous gel, 2.5 parts by weight of liquid paraffin was added with stirring with a propeller (200 rpm).

Comparative Product 3 To 97 parts by weight of the aqueous gel, 1 part by weight of N-stearoyl-L-monoglutamate and 2 parts by weight of glycerin were added under stirring with a propeller (200 rpm).

Table 1 shows the results of evaluation of the product of the present invention and the comparative product based on the following conditions and evaluation criteria. Appearance evaluation: The appearance of the serum immediately after production was visually observed. Light transmittance: UV-visible absorption spectrophotometer UV-160 (manufactured by Shimadzu Corporation) Evaluation of moist feeling: After washing the face with a cleansing foam by 10 female panelists, each sample was applied to the face to evaluate the moist feeling.

[0033]

[Table 1]

The cosmetic serum of the present invention was transparent in appearance and excellent in moist feeling.

Example 2 An aqueous gel and a fine emulsion were prepared in the following manner. (1) Aqueous gel An aqueous gel was produced in the same manner as in Example 1 with the composition of the aqueous gel composition ratio in Table 2. (2) Fine emulsified emulsion With the composition of the composition ratio of the fine emulsified emulsion in Table 2, a fine emulsified emulsion was produced by the following method. (A) After pre-emulsifying the finely emulsified emulsion composition by stirring with a propeller, a microfluidizer (Microfluidic
s) (1750 kg / cm ² ). (B) After the finely emulsified emulsion composition was preliminarily emulsified by stirring with a propeller, high-pressure treatment was performed at a shear pressure of 2800 kg / cm ² using DeBEE200 (manufactured by BEE International). (C) The fine emulsified emulsion composition was heated to 85 ° C., stirred, and allowed to cool to room temperature.

The aqueous gel and the fine emulsified emulsion were mixed by propeller stirring to produce a serum. The measurement results of the appearance and stability are shown in Table 2, and all were transparent and excellent in stability.

[0037]

[Table 2]

Example 3 The aqueous gel and the finely emulsified emulsion (1) of Example 1 were produced and mixed at a weight ratio of 1: 1 to produce a serum (Tables 3 and 4).

[0039]

[Table 3]

[0040]

[Table 4]

[0041]

As described above, a large amount of an oily component can be blended while maintaining transparency, and a feeling of use peculiar to an oily component such as a moist feeling can be obtained.

Continuing on the front page (72) Inventor Toru Okada 2-1-3 Bunka, Sumida-ku, Tokyo F-term in Kao Corporation Research Laboratories 4C083 AB032 AC022 AC072 AC102 AC122 AC132 AC182 AC242 AC352 AC392 AC432 AC642 AC662 AC692 AC792 AC902 AD042 AD092 AD152 AD282 AD302 AD352 AD432 AD492 BB11 DD01 DD31 DD41 EE06 EE07

Claims (2)

[Claims] 1. An oily component is contained as emulsified particles, the average particle size of the emulsified particles is 0.02 to 1.0 μm, the appearance is transparent, and the viscosity is 200 to 100000 mPa · s.
A serum that is s. 2. The composition according to claim 1, which contains a water-soluble polymer compound.
The described serum.