JP2008266252A - Milky lotion of skin cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a milky lotion of skin cosmetic excellent in preserving stability, not being slippery or watery in applying on the skin, excellent in spreading property and having a good feeling of use with a cream-like resistant feeling in spreading. <P>SOLUTION: The invention relates to the milky lotion of skin cosmetic comprising (A) a water-swellable clay mineral, (B) an amino acid type surfactant, (C) a thickening polymer, and (D) polyoxyethylene fatty acid and/or (poly)glycerin fatty acid ester, and optionally containing (E) a fatty acid. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a milky skin cosmetic. The emulsion in the present invention refers to a state where the viscosity value is 100 to 5,000 mPa · s and the zeta potential value is −90 to −60 mV.

  Conventionally, water-swellable clay minerals have been blended into liquid cosmetics and emulsified cosmetics from the viewpoints of increasing the viscosity of the system, giving a smooth feeling of use, and improving emulsification stability.

  However, when blended with liquid cosmetics, there has been a problem of aggregation and sedimentation. Moreover, when it mix | blends with emulsified cosmetics, there existed a problem that emulsified particle | grains aggregated and formed secondary particle | grains and thickened. In order to solve such problems, attempts have been made to improve the storage stability of the preparation by suppressing aggregation and thickening of the water-swellable clay mineral. For example, Patent Document 1 proposes a method for producing a liquid cosmetic composition in which a water-swellable clay mineral is dispersed in an aqueous solution by mixing with a strong shear force applied. Patent Document 2 proposes an oil-in-water emulsified cosmetic in which an oil phase composed of an oil agent under certain conditions forms pseudo-aggregated particles having a specific particle size and is dispersed in an aqueous phase.

  However, although these techniques can prevent aggregation and thickening and provide excellent storage stability of the preparation, there is a problem that a water-like feeling during use is not obtained and a good feeling is not obtained.

  On the other hand, when the water-swellable clay mineral is blended in the emulsion cosmetic, there is a problem that the emulsified particles are aggregated to form secondary particles, the viscosity is remarkably increased, and the formulation itself is difficult. Moreover, even if it could be formulated, it was difficult to impart excellent storage stability. Furthermore, the emulsified particles are disintegrated during application, resulting in a slippery or watery feeling on the skin, and a good feeling with resistance like cream cannot be obtained, and the spreadability on the skin is inferior. There was also a problem.

Japanese Patent Laid-Open No. 10-175821 JP 2001-39827 A

  The present invention has been made in view of the prior art, and is excellent in the storage stability of the preparation, has no sliding or wateriness on the skin at the time of application, and has excellent spreadability on the skin, Furthermore, it is an object of the present invention to provide an emulsion skin cosmetic that has a good feeling of resistance (hereinafter referred to as a rich feeling of use) such as a cream when spread.

That is, the present invention
[1] It comprises (A) a water-swellable clay mineral, (B) an amino acid surfactant, (C) a thickening polymer and (D) a polyoxyethylene fatty acid and / or (poly) glycerin fatty acid ester. Milky skin cosmetics,
[2] The milky skin cosmetic according to [1], wherein the component (B) is N-acyl glutamate,
[3] The content of the component (A) and the content of the component (B)
(A) Content of component ≧ (B) Content of component is satisfied The milky skin cosmetic according to [1] or [2],
[4] The milky skin cosmetic according to any one of [1] to [3], wherein the component (C) is xanthan gum, and
[5] Further, the present invention relates to the milky skin cosmetic according to any one of [1] to [4], further comprising (E) a fatty acid.

  The milky skin cosmetic of the present invention has an excellent effect on the storage stability of the preparation that maintains the milky form. Moreover, there is no slip and wateriness on the skin at the time of application | coating, and there exists an effect excellent in the usability | use_condition. Furthermore, it is excellent in the spreadability on the skin, and has an effect of having a rich feeling during use.

  The milky skin cosmetic of the present invention comprises (A) a water-swellable clay mineral, (B) an amino acid surfactant, (C) a thickening polymer and (D) a polyoxyethylene fatty acid and / or (poly) glycerin. Contains fatty acid esters.

  Specific examples of the water-swellable clay mineral (A) are not particularly limited as long as they are natural products, purified products from natural products, or synthetic materials. For example, bentonite, montmorillonite, beidellite, nontonite, Examples thereof include smectite group clay minerals such as saponite and hectorite; vermiculite group clay minerals such as vermiculite. These components may be used alone or in combination of two or more. As a suitable component (A), it is preferable to use bentonite, montmorillonite, saponite, and hectorite from the viewpoint of storage stability and excellent usability at the time of spreading, and it is more preferable to use bentonite.

  The average particle size of the component (A) to be used is not particularly limited, but is preferably 0.1 to 5 μm, more preferably 0.2 to 3 μm, from the viewpoint of improving storage stability.

  The content of the component (A) is not particularly limited as long as a desired effect is imparted, but usually it suppresses overslip and wateriness on the skin at the time of application, and a feeling of use that is rich at the time of spreading. In the composition, 0.01% by weight or more is preferable, and more preferably 0.1% by weight or more. Further, from the viewpoint of improving storage stability, the content is preferably 2% by weight or less, more preferably 1% by weight or less in the composition. From these viewpoints, the content of component (A) is preferably 0.01 to 2% by weight, more preferably 0.1 to 1% by weight.

  (B) As an amino acid type surfactant of a component, N-acyl sarcosine salt, N-acyl glutamate, N-acyl methyl alanine salt, N-acyl glycine salt etc. are mentioned, for example. Examples of the salt used include metal salts such as sodium, potassium, magnesium, aluminum and titanium; alkanolamine salts such as monoethanolamine, diethanolamine and triethanolamine; ammonium salts and the like.

  Specifically, N-acyl sarcosine salts such as potassium lauroyl sarcosine, lauroyl sarcosine triethanolamine, sodium myristoyl sarcosine, coconut oil fatty acid sarcosine sodium; sodium lauroyl glutamate, potassium lauroyl glutamate, triethanolamine lauroyl glutamate, sodium myristoyl glutamate, N-acyl glutamates such as potassium myristoyl glutamate, potassium stearoyl glutamate, disodium stearoyl glutamate, potassium cocoyl glutamate, coconut oil fatty acid acyl glutamate sodium, coconut oil fatty acid acyl glutamate triethanolamine, coconut oil fatty acid / hardened beef tallow fatty acid acyl glutamate sodium ; Lauroylmethylalani N-acylmethylalanine salts such as sodium, lauroylmethylalanine triethanolamine, sodium myristoylmethylalanine, coconut oil fatty acid methylalanine sodium; N-acylglycine salts such as coconut oil fatty acid acylglycine potassium, coconut oil fatty acid acylglycine sodium, etc. Can be illustrated. These components may be used alone or in combination of two or more. As a suitable component (B), N-acyl glutamate is preferably used from the viewpoint of maintaining an emulsion form.

  The content of the component (B) is not particularly limited as long as the desired effect is imparted, but usually, 0.01% by weight or more is contained in the composition from the viewpoint of suppressing the thickening due to the component (A). Preferably, it is 0.05% by weight or more. Further, from the viewpoint of storage stability, it is preferably 2% by weight or less, more preferably 1% by weight or less. From these viewpoints, the content of component (B) is preferably 0.01 to 2% by weight, more preferably 0.05 to 1% by weight.

In addition, the content of the component (A) and the content of the component (B) are the following inequalities from the viewpoint of suppressing the thickening by the component (A): content of the component (A) ≧ content of the component (B) It is preferable to be prepared by filling. Thereby, while being able to provide the outstanding storage stability, it is advantageous in providing the rich feeling of use at the time of extension.

  Examples of (C) thickening polymers include water-soluble natural thickening polymers, semi-synthetic thickening polymers, and synthetic thickening polymers. Specifically, natural thickening polymers such as gum arabic, tragacanth gum, guar gum, xanthan gum, julan gum, locust bean gum, karaya gum, iris moss, quince seed, gelatin, shellac, rosin, casein; sodium carboxymethyl cellulose, hydroxyethyl cellulose, Semi-synthetic thickening polymers such as methyl cellulose, ethyl cellulose, sodium alginate, ester gum, nitrocellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, crystalline cellulose; acrylic acid / alkyl methacrylate copolymer, acrylic acid / polyoxyethylene alkyl itacon Acid copolymer, alkyl acrylate / methacrylic acid polyoxyethylene alkyl ether copolymer, acrylic acid / acrylic acid Roxyalkyl copolymers, acrylic acid / methacrylic acid polyoxyethylene alkyl ether crosspolymer, acrylic acid / alkyl copolymers such as neodecanoic acid vinyl crosspolymer, polyvinyl alcohol, sodium polyacrylate, carboxyvinyl polymer, polyvinylmethylcellulose And synthetic thickening polymers such as polyamide resins. These components may be used alone or in combination of two or more. As a suitable component (C), it is preferable to use a natural thickening polymer from the viewpoint of suppressing slipping and wateriness on the skin during application, and it is more preferable to use xanthan gum.

  The content of the component (C) is not particularly limited as long as a desired effect is imparted, but normally, it suppresses overslip and wateriness on the skin from the viewpoint of improving storage stability and application. From the viewpoint, 0.001% by weight or more is preferable in the composition, and more preferably 0.01% by weight or more. Further, from the viewpoint of suppressing deterioration in the feeling of use during the extension, it is preferably 1% by weight or less, more preferably 0.5% by weight or less. From these viewpoints, the content of the component (C) is preferably 0.001 to 1% by weight, more preferably 0.01 to 0.5% by weight in the composition.

  Specific examples of component (D) polyoxyethylene fatty acid include, for example, polyethylene glycol monolaurate, polyethylene glycol monopalmitate, polyethylene glycol monostearate, polyethylene glycol monooleate, polyethylene glycol monoisostearate, polyethylene glycol dilaurate. Examples thereof include polyethylene glycol dipalmitate, polyethylene glycol distearate, polyethylene glycol dioleate, polyethylene glycol diisostearate, and the like.

  Specific examples of (poly) glycerin fatty acid esters include, for example, glycerin fatty acid esters such as glyceryl monolaurate, glyceryl monomyristate, glyceryl monostearate, glyceryl monooleate, and glyceryl isostearate; polyglyceryl monolaurate, monomyristin Examples thereof include polyglyceryl fatty acid esters such as polyglyceryl acid, polyglyceryl monostearate, polyglyceryl monooleate, polyglyceryl monoisostearate, polyglyceryl distearate, polyglyceryl diisostearate, polyglyceryl tristearate, and polyglyceryl triisostearate. These components may be used alone or in combination of two or more.

  The content of the component (D) is not particularly limited as long as a desired effect is imparted, but usually 0.01% by weight or more is preferable in the composition from the viewpoint of storage stability, more preferably 0. .1% by weight or more. Moreover, from a viewpoint of maintaining an emulsion form, 3 weight% or less is preferable, More preferably, it is 2 weight% or less. From these viewpoints, the content of the component (D) is preferably 0.01 to 3% by weight, more preferably 0.1 to 2% by weight in the composition.

  Furthermore, (E) fatty acid can be contained in the emulsion skin cosmetics of this invention. Examples of the component (E) include higher fatty acids having 12 to 22 carbon atoms such as lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, and behenic acid; vegetable oils such as olive oil, coconut oil, palm oil, and cottonseed oil. Fats and oils; animal oils such as fish oil and beef tallow can be exemplified. These components may be used alone or in combination of two or more. As a suitable (E) component, it is preferable to use a higher fatty acid having 12 to 22 carbon atoms from the viewpoint of improving the feeling of use when spreading, and more preferred are lauric acid, myristic acid, palmitic acid, and stearic acid. Preferably used.

  The content of the component (E) is not particularly limited as long as a desired effect is imparted, but is usually 0.01% by weight or more in the composition from the viewpoint of improving the feeling of use when spreading. Is preferable, and more preferably 0.05% by weight or more. Moreover, from a viewpoint of suppressing the deterioration of the usability at the time of extension, 2 weight% or less is preferable, More preferably, it is 1 weight% or less. From these viewpoints, the content of the component (E) is preferably 0.01 to 2% by weight, more preferably 0.05 to 1% by weight in the composition.

  In the emulsion skin cosmetics of the present invention, as long as the effects of the present invention are not impaired, components commonly used in cosmetics in addition to the above-described components, for example, hydrocarbon oils such as liquid paraffin, squalane and petrolatum Ester oils such as isopropyl myristate and 2-ethylhexyl palmitate; silicone oils such as methylpolysiloxane and methylphenylpolysiloxane; higher alcohols such as cetyl alcohol and stearyl alcohol; dipropylene glycol, 1,3-butylene glycol, 1 , 2-pentanediol, 1,2-hexanediol, 1,2-octanediol and other polyhydric alcohols; preservatives, ultraviolet absorbers, sequestering agents, antioxidants, moisturizers, cooling agents, vitamins, Plant extract, pH adjuster, fragrance, purified water, etc. depending on purpose Can be Yibin blended.

  In addition, the emulsion skin cosmetic of the present invention is prepared in the range of a viscosity value of 100 to 5,000 mPa · s and a zeta potential value measured by electrophoretic light scattering method of −90 to −60 mV. .

  The emulsion skin cosmetic of the present invention can be produced by a conventional method, and can be suitably used for skin creams, hand creams, basic cosmetics, makeup cosmetics, facial cleansers, after-shave lotions and the like.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited only to these Examples. The blending amount represents “% by weight” unless otherwise specified.

(Sample preparation 1)
According to the composition described in Table 1 and Table 2, each sample of Examples 1-4 and Comparative Examples 1-4 was prepared according to the conventional method, and it used for the following evaluation. The results are shown in Table 1 and Table 2, respectively. In addition, all evaluation was implemented on the constant conditions of constant temperature and humidity of 23 degreeC and 60% of humidity.

(Test Example 1: Property, viscosity measurement and zeta potential measurement)
After confirming the properties immediately after production of each sample of Examples and Comparative Examples by visual observation, the viscosity was set to No. The measurement was performed under conditions of 3 rotors, 6 rpm, and 1 min. Each sample was then diluted with purified water and the zeta potential was measured. For the viscosity measurement, a TV-22 viscometer (manufactured by Toki Sangyo Co., Ltd.) was used. In addition, a laser zeta electrometer ELS-8000 (manufactured by Otsuka Electronics Co., Ltd.) was used for zeta potential measurement.

(Test Example 2: Evaluation of storage stability of the preparation)
Each sample of Examples and Comparative Examples was filled with 50 g in a 50 mL glass screw tube, and the state of the preparation after storage for 1 month in a constant temperature bath at 40 ° C. was visually observed and evaluated according to the following criteria.

<Evaluation criteria for storage stability of pharmaceutical preparations>
○: No change is observed immediately after production Δ: Thickening due to slight aggregation is observed ×: Thickening due to obvious aggregation is observed

(Test Example 3: Evaluation of usability during application)
Each sample of the example and the comparative example was used by 10 professional panels, and sensory evaluation was performed according to the following criteria for the skid and wateriness on the skin immediately after application.

<Evaluation criteria for upslip on skin>
○: 8 or more out of 10 responded that there was no upslip on the skin △: 4-7 out of 10 responded that there was no upslip on the skin ×: 3 or less of 10 out of 10 on the skin No slipping

<Evaluation criteria for wateriness>
○: 8 or more of 10 respondents have no wateriness △: 4 to 7 of 10 respondents have no wateriness ×: 3 or less of 10 persons have no wateriness Answer

(Test Example 4: Usability evaluation during extension)
After the evaluation of Test Example 3 by the above 10 specialist panels, the panel was stretched on the skin and subjected to sensory evaluation according to the following criteria for spreadability and usability.

<Evaluation criteria for spreadability>
○: Answer that 8 or more out of 10 are excellent in spreadability △: Answer that 4 to 7 out of 10 are excellent in spreadability ×: Answer that 3 or less in 10 are excellent in spreadability

<Evaluation criteria for usability>
○: 8 or more out of 10 people answered that it has a good feeling. △: 4 to 7 out of 10 people said that it has a good feeling of use. Replied

  From the results shown in Tables 1 and 2, the emulsion skin cosmetics of each example maintained the emulsion form as compared with those of each comparative example, and excellent storage stability of the preparation. It can be seen that In addition, it is understood that there is no upslip or wateriness on the skin at the time of application, and the spreadability is excellent. Here, the viscoelasticity test results of Example 1 and Comparative Example 1 are shown in FIG. 1 and FIG. From these test result diagrams, it can be seen that, in contrast to Comparative Example 1, in the emulsion skin cosmetic of the present invention (Example 1), the viscosity increases due to the application of shear stress. That is, it can be seen that the viscosity behavior as in Example 1 is not a watery feeling, which is a characteristic effect of the present invention, but is a factor that brings a rich feeling to use.

In the viscoelasticity test, a stress-controlled rheometer MCR300 (manufactured by PHYSICA) was used, and the shear rate was ^{1 to} 600 s ⁻¹ (5 min), 600 to ^{1 s −1} (5 min), and the temperature was 25 ° C.

  Hereinafter, formulation examples of the emulsion skin cosmetics according to the present invention will be shown. In addition, a compounding quantity is weight%.

(Prescription Example 1)
Bentonite 0.8
N-stearoyl-sodium L-glutamate 0.5
Xanthan gum 0.2
Lipophilic glyceryl monostearate 0.7
Sorbitan monostearate 0.3
Palmitic acid 0.5
Myristyl alcohol 0.3
Squalane 10.0
Glyceryl tri-2-ethylhexanoate 1.0
Methylphenyl polysiloxane 0.5
Concentrated glycerin 5.0
1,3-butylene glycol 8.0
Macadamia nut fatty acid phytosteryl 1.0
Glycerin mono-2-ethylhexyl ether 0.2
1,2-octanediol 0.1
Purified water balance 100.0

(Prescription example 2)
Hectorite 0.5
N-coconut oil fatty acid / hardened beef tallow fatty acid-sodium L-glutamate
0.3
Xanthan gum 0.2
Lipophilic glyceryl monostearate 0.7
Polyethylene glycol monostearate 0.3
Behenic acid 0.5
Behenyl alcohol 0.3
Squalane 10.0
Vaseline 1.0
Methyl polysiloxane 1.0
Dipropylene glycol 10.0
(Adipic acid, 2-ethylhexanoic acid, stearic acid)
Glyceryl oligoester 0.5
Glycerin mono-2-ethylhexyl ether 0.2
1,2-octanediol 0.1
Purified water balance 100.0

FIG. 3 is a diagram illustrating a viscoelasticity test result of Example 1.

It is a figure showing the viscoelasticity test result of the comparative example 1.

Claims (5)

  Emulsion skin containing (A) water-swellable clay mineral, (B) amino acid surfactant, (C) thickening polymer and (D) polyoxyethylene fatty acid and / or (poly) glycerin fatty acid ester Cosmetics.   The emulsion skin cosmetic according to claim 1, wherein the component (B) is N-acyl glutamate. The content of (A) component and the content of (B) component are the following inequalities
Content of (A) component> (B) Content of component is satisfy | filled, The emulsion skin cosmetics of Claim 1 or 2 characterized by the above-mentioned.   (C) A component is a xanthan gum, The milky skin cosmetics in any one of Claims 1-3.   The milky skin cosmetic according to any one of claims 1 to 4, further comprising (E) a fatty acid.

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