JP4722683B2 - Emulsion composition for skin - Google Patents

Description

  The present invention relates to an emulsified composition for skin. More specifically, the present invention relates to an emulsified composition for skin having excellent stretchability, no stickiness after application, excellent moisturizing effect, and excellent temperature stability of the preparation.

  Conventionally, a large number of emulsions and cream-like cosmetics having a moisturizing effect have been put on the market in order to prevent skin dryness. As a means for imparting such a moisturizing effect, it is common to add an oil component to form a film on the skin to prevent evaporation of moisture. However, when the oil component is highly blended, the moisturizing effect is improved, but the feeling of use such as stickiness after application, oiliness, film thickness feeling is inferior, and the moisturizing effect decreases due to solidification of the film. He also had problems.

  In addition, in an emulsified composition with a high blend of oily components, aggregation and separation of the oily components occur due to temperature changes, so a stable emulsified composition in a wide temperature range of low and high temperatures. It was difficult to prepare.

  In order to solve such problems, attempts have been made to suppress the stickiness and oiliness peculiar to oil components and to provide a moisturizing effect. For example, a moisturizing emulsified cosmetic containing an oil, a glutamic acid derivative, an inorganic salt and a surfactant (see Patent Document 1), or an oil-in-water emulsified cosmetic containing a lipophilic surfactant, oil and water (See Patent Document 2). Attempts have also been made to propose an emulsion composition having a moisturizing effect and excellent stability over time. For example, oil-in-water emulsified cosmetics containing phospholipids, nonionic surfactants, higher alcohols, oils, polyhydric alcohols and water (see Patent Document 3), nonionic surfactants, volatiles A water-in-oil emulsified cosmetic containing silicone, water and a hydrogenated dimer acid derivative (see Patent Document 4) has been proposed.

  However, although the moisturizing effect can be temporarily provided based on these attempts, the sustainability of the moisturizing effect is not yet satisfactory. In addition, the emulsion stability over a wide temperature range is not yet satisfactory.

JP-A-6-287128 JP-A-8-310940 JP 2004-269502 A JP 2005-104854 A

  The present invention has been made in view of the above-described prior art, has excellent stretchability, reduces the sticky feeling peculiar to oil components after coating, has excellent moisturizing effect, and further emulsifies in a wide temperature range. It is an object to provide an emulsion composition for skin that is also excellent in stability.

That is, the present invention
[1] (A) at room temperature solid hydrocarbons, (B) waxes, (C) polyoxyethylene sorbit beeswax and (E) Ri greens contain N- acyl glutamates, wherein the (B) wax is beeswax der Ru dermatological emulsion composition,
[2] The (A) the room temperature and solid hydrocarbons (B) content ratio by weight of wax (the (A) content of the hydrocarbon is solid at room temperature: (B) the content of the wax) is The emulsion composition for skin according to the above [1], which is 1: 1 to 1: 4,
[3] The emulsion composition for skin according to [1] or [2] above, comprising (D) a fatty acid ester type nonionic surfactant;
[4] The above (D) fatty acid ester type nonionic surfactant is the glycerin fatty acid ester optionally added with polyoxyethylene and / or the sorbitan fatty acid ester optionally added with polyoxyethylene [3] dermatological emulsion composition according to a dermatological emulsion composition according to any of <br/> in parallel beauty [5] (F) wherein comprising a polyhydric alcohol [1] to [4].

  The emulsified composition for skin of the present invention is excellent in stretchability and exhibits an effect of suppressing the sticky feeling peculiar to the oily component after coating by forming a uniform film without feeling of film thickness. Moreover, it has the effect of having excellent emulsification stability in a wide temperature range in a low temperature range and a high temperature range, as well as excellent sustainability of the moisturizing effect.

  The emulsified composition for skin of the present invention contains (A) a hydrocarbon that is solid at room temperature, (B) waxes, and (C) polyoxyethylene sorbit beeswax.

  Examples of the (A) component solid hydrocarbon at room temperature include ceresin, paraffin, microcrystalline wax, polyethylene wax, petrolatum and the like. These components may be used alone or in combination of two or more. As a suitable hydrocarbon at room temperature, it is preferable to use paraffin and petrolatum from the viewpoints of good stretchability, forming a uniform film, and reducing stickiness immediately after coating. Can be used. In addition, the room temperature in this invention represents the temperature range of 1-30 degreeC. Moreover, the solid in this invention represents the property of semi-solid-solid.

  The content of the component (A) is not particularly limited as long as the desired effect is sufficiently imparted, but usually 0.1% by weight or more is preferable in the composition from the viewpoint of forming a uniform film. More preferably, it is 0.5% by weight or more. Moreover, from a viewpoint of suppressing a sticky feeling and a film thickness feeling, 5 weight% or less is preferable, More preferably, it is 3 weight% or less. From these viewpoints, the content of the component (A) is preferably 0.1 to 5% by weight, more preferably 0.5 to 3% by weight in the composition.

Examples of the wax of component (B) include carnauba wax, candelilla wax, beeswax, shellac wax, whale wax, lanolin and the like . The good optimal waxes, good stretchability, to form a uniform film, from the viewpoint of reducing the stickiness immediately after coating, it is preferable to use candelilla wax, beeswax, in the present invention, beeswax or the aspect Used .

  The content of the component (B) is not particularly limited as long as the desired effect is sufficiently imparted, but usually 0.1% by weight or more is preferable in the composition from the viewpoint of forming a uniform film. More preferably, it is 0.5% by weight or more. Moreover, 5 weight% or less is preferable from a viewpoint of suppressing a sticky feeling and a film thickness feeling, More preferably, it is 4 weight% or less. From these viewpoints, the content of the component (B) is preferably 0.1 to 5% by weight, more preferably 0.5 to 4% by weight in the composition.

  In addition, it improves stretchability, suppresses stickiness and oiliness after application by forming a uniform film without feeling of film thickness, and maintains persistence by suppressing skin solidification due to film drying. From the viewpoint of imparting a certain moisturizing effect, the weight content ratio (A) :( B) in the composition of the component (A) and the component (B) is preferably adjusted to be 1: 1 to 1: 4. More preferably, it is 1: 2 to 1: 3.

  The polyoxyethylene sorbit beeswax (C) is a component obtained by reacting beeswax with polyoxyethylene sorbitol obtained by addition polymerization of ethylene oxide to sorbitol. Thereby, while forming the uniform membrane | film | coat without a film thickness feeling can be improved, the outstanding emulsion stability can be provided. The number of moles of ethylene oxide to be polymerized is not particularly limited.

  The content of the component (C) is not particularly limited as long as the desired effect is sufficiently imparted, but usually in the composition from the viewpoint of improving the formation of the film and the stability of the emulsion system. 0.1% by weight or more is preferable, and more preferably 0.5% by weight or more. Further, from the viewpoint of suppressing stickiness, deterioration of washing-off and emulsification due to temperature change, 5% by weight or less is preferable, and more preferably 4% by weight or less. From these viewpoints, the content of the component (C) is preferably 0.1 to 5% by weight, more preferably 0.5 to 4% by weight in the composition.

  In addition, as a commercial item of (C) component which can be used for this invention, NIKKOL GBW-25, 125 (Brand name, all are the Nikko Chemicals company make) etc. can be illustrated, for example.

  Moreover, the emulsion composition for skin of this invention can contain the fatty-acid-ester type nonionic surfactant of (D) component from a viewpoint of further improving the emulsion stability at the time of low temperature and high temperature storage. Examples of the fatty acid ester type nonionic surfactant include glycerin fatty acid ester to which polyoxyethylene may be added, sorbitan fatty acid ester to which polyoxyethylene may be added, and the like. Specific examples of the glyceryl fatty acid ester to which polyoxyethylene may be added include glyceryl fatty acid esters such as glyceryl monomyristate, glyceryl monostearate, glyceryl monooleate, glyceryl monoisostearate, and glyceryl monocaprylate; mono Examples thereof include polyoxyethylene glyceryl fatty acid esters such as polyoxyethylene glyceryl stearate and polyoxyethylene glyceryl monooleate. Specific examples of the sorbitan fatty acid ester to which polyoxyethylene may be added include sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquistearate, sorbitan tristearate, sorbitan monooleate, Sorbitan fatty acid esters such as sorbitan sesquioleate, sorbitan trioleate, sorbitan monoisostearate, sorbitan sesquiisostearate, coconut oil fatty acid sorbitan; monococonut oil fatty acid polyoxyethylene sorbitan, monopalmitic acid polyoxyethylene sorbitan, monostearic acid poly Oxyethylene sorbitan, polyoxyethylene sorbitan tristearate, polyoxyethylene sorbitan monooleate, triolei Polyoxyethylene sorbitan, polyoxyethylene sorbitan fatty acid esters such as monoisostearate, polyoxyethylene sorbitan and the like can be exemplified. These components may be used singly or in combination of two or more, from the viewpoint of further improving the emulsion stability. Suitable fatty acid ester type nonionic surfactants are glyceryl monostearate, glyceryl monooleate, sorbitan monooleate, polyoxyethylene sorbitan monostearate, polyoxyethylene sorbitan tristearate, monoolein from the above viewpoint. Acid polyoxyethylene sorbitan and polyoxyethylene sorbitan trioleate can be preferably used.

  The content of the component (D) is not particularly limited as long as the desired effect is sufficiently imparted, but usually 0.1% by weight or more is preferable in the composition from the viewpoint of further improving the emulsion stability. More preferably, it is 1% by weight or more. Moreover, 7 weight% or less is preferable from a viewpoint of suppressing that the emulsification system by a sticky feeling, the deterioration of washing-off, and a temperature change collapses, More preferably, it is 5 weight% or less. From these viewpoints, the content of the component (D) is preferably 0.1 to 7% by weight, more preferably 1 to 5% by weight in the composition.

  In addition, the content ratio of the component (C) and the component (D) is a weight content ratio in the composition from the viewpoint of suppressing aggregation and separation of the oil component during storage at low temperature and high temperature and imparting excellent emulsion stability. (C) :( D) is preferably prepared in a range of 2: 1 to 1: 4, more preferably 1: 1 to 1: 3.

Further, dermatological emulsion composition of the present invention, from the viewpoint of dramatically improving the emulsion stability during high-temperature storage, you containing N- acyl glutamates of component (E). Specific examples of N-acyl glutamate include coconut oil fatty acid acyl glutamate potassium, coconut oil fatty acid acyl glutamate sodium, coconut oil fatty acid acyl glutamate triethanolamine, lauroyl glutamate potassium, lauroyl glutamate sodium, lauroyl glutamate triethanolamine, myristoyl glutamate Examples thereof include potassium, sodium myristoyl glutamate, potassium stearoyl glutamate, sodium stearoyl glutamate, disodium stearoyl glutamate, sodium hardened tallow fatty acid acyl glutamate, coconut oil fatty acid / hardened tallow fatty acid sodium acyl glutamate, and the like. One of these components may be used alone, or two or more thereof may be used in appropriate combination. As a preferable N-acyl glutamate, sodium lauroyl glutamate, sodium myristoyl glutamate, and sodium stearoyl glutamate are preferable from the above viewpoint, and sodium stearoyl glutamate can be more preferably used.

  The content of the component (E) is not particularly limited as long as the desired effect is sufficiently imparted, but usually, 0.1% in the composition from the viewpoint of improving the stability of the emulsification system during high temperature storage. % By weight or more is preferable, and more preferably 0.3% by weight or more. Moreover, 3 weight% or less is preferable from a viewpoint which suppresses that a sticky feeling, the deterioration of washing-off, and the emulsion system by a temperature change collapse | crumble, More preferably, it is 2 weight% or less. From these viewpoints, the content of the component (E) is preferably 0.1 to 3% by weight, more preferably 0.3 to 2% by weight in the composition.

  The content ratio of the component (C) and the component (E) is the weight content ratio (C) in the composition from the viewpoint of suppressing aggregation and separation of the oily component during high temperature storage and imparting excellent emulsion stability. ) :( E) is preferably prepared in a range of 4: 1 to 1: 2, more preferably 3: 1 to 1: 1.

  Furthermore, the emulsion composition for skin of this invention can be made to contain the polyhydric alcohol of (F) component from a viewpoint of providing the outstanding moisturizing effect continuously. Specific examples thereof include ethylene glycol, dipropylene glycol, propylene glycol, glycerin, diglycerin, 1,3-butylene glycol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol, and the like. It can be illustrated. These components may be used alone or in combination of two or more. As the suitable polyhydric alcohol, 1,3-butylene glycol, 1,2-pentanediol, 1,2-hexanediol, 1,2-octanediol is preferably used from the above viewpoint, and 1,3-butylene is preferable. Glycol and 1,2-octanediol are preferably used.

  The content of the component (F) is not particularly limited as long as the desired effect is sufficiently imparted, but is usually preferably 0.1% by weight or more in the composition from the viewpoint of imparting excellent moisturizing power. More preferably, it is 0.5% by weight or more. Moreover, from a viewpoint of suppressing a sticky feeling, 5 weight% or less is preferable, More preferably, it is 4 weight% or less. From these viewpoints, the content of the component (F) is preferably 0.1 to 5% by weight, more preferably 0.5 to 4% by weight in the composition.

  Furthermore, in the emulsion composition for skin of the present invention, within the range not impairing the effects of the present invention, in addition to the above-described components, components commonly used in cosmetics, for example, oily components other than those described above, lower alcohols, A sugar alcohol, an ultraviolet absorber, a thickener, an amino acid, a fragrance, a dye, a chelating agent, an antioxidant, an antiseptic, a vitamin, a plant extract, a pH adjuster, and the like can be appropriately blended depending on the purpose.

  When manufacturing the emulsion composition for skin of this invention, it can manufacture by mixing each said component and emulsifying by the well-known method, for example, the phase inversion emulsification method using a homomixer.

  The emulsified composition for skin of the present invention forms a uniform film without feeling of film thickness, and has an effect of excellent sustainability of moisturizing power. For example, facial emulsion, body emulsion, cream, etc. It can be preferably applied to the dosage form.

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

(Sample preparation)
According to the composition described in Table 1 and 2, each sample of Examples 1-5 and Comparative Examples 1-3 was prepared according to the conventional method, respectively, and it used for the following evaluation. The results are shown in Tables 1 and 2, respectively.

(Test Example 1: Evaluation of low-temperature stability)
The emulsified composition for skin obtained in each Example and each Comparative Example was sealed in a 50 mL jar, freezed and thawed from -20 ° C to room temperature in 24 hours, and this operation was repeated 10 times. The state of the system was visually observed and evaluated according to the following evaluation criteria.

<Evaluation criteria for low-temperature stability>
◎: No change observed immediately after production ○: Almost no change observed immediately after production Δ: Slight aggregation / separation observed X: Clear aggregation / separation observed

(Test Example 2: Evaluation of high-temperature stability)
The emulsified composition for skin obtained in each example and each comparative example was sealed in a 50 mL jar, stored in a thermostatic bath at 50 ° C. for 120 hours, and then the state of the emulsified system was visually observed to evaluate the following. Evaluation was made according to criteria.

<Evaluation criteria for high-temperature stability>
◎: No change observed immediately after production ○: Almost no change observed immediately after production Δ: Slight aggregation / separation observed X: Clear aggregation / separation observed

(Test Example 3: Evaluation of use feeling)
The emulsified composition for skin obtained in each Example and each Comparative Example was applied to the skin for a use test, and sensory evaluation was performed according to the following five-stage evaluation criteria regarding good stretchability and lack of stickiness. In addition, evaluation was implemented by 20 professional panels, and the evaluation was determined according to the following criteria based on the average score.

<Evaluation criteria for usability>
5 points: very good 4 points: good 3 points: normal 2 points: defective 1 point: very bad

<Criteria for feeling of use>
A: Average 4.0 points or more ○: Average 3.0 points or more and less than 4.0 points Δ: Average 2.0 points or more and less than 3.0 points ×: Average less than 2.0 points

(Test Example 4: Evaluation of sustainability of moisturizing effect)
The emulsified composition for skin obtained in each Example and each Comparative Example was applied to the skin, and the moisturizing effect after 12 hours was subjected to sensory evaluation according to the following five evaluation criteria. The evaluation was carried out by 20 female professional panels, and the evaluation was determined from the average score according to the following criteria.

<Evaluation criteria for sustainability of moisturizing effect>
5 points: very good 4 points: good 3 points: normal 2 points: defective 1 point: very bad

<Criteria for sustainability of moisturizing effect>
A: Average 4.0 points or more ○: Average 3.0 points or more and less than 4.0 points Δ: Average 2.0 points or more and less than 3.0 points ×: Average less than 2.0 points

  From the results shown in Tables 1 and 2, the emulsified composition for skin obtained in each example was excellent in emulsification at low and high temperatures, compared with the emulsified composition for skin obtained in each comparative example. It turns out that it has stability. Moreover, it turns out that it has the outstanding usability from a good stretchability and no stickiness. Furthermore, it can be seen that the moisture retention effect is significantly superior.

  Hereinafter, the formulation example of the emulsion composition for skin which concerns on this invention is shown. The content is% by weight.

(Formulation example 1: Treatment cream)
Vaseline 1.0
Beeswax 2.0
Polyoxyethylene sorbit beeswax 1.5
N-stearoyl-sodium L-glutamate 0.5
Glyceryl monooleate 1.0
Polyoxyethylene sorbitan monostearate 1.0
Polyoxyethylene sorbitan trioleate 2.0
1,2-octanediol 1.0
Xanthan gum 0.3
Stearyl alcohol 6.0
Stearic acid 2.0
Hydrogenated lecithin 0.5
Squalane 5.0
Octyldodecanol 10.0
Glycerin 10.0
Dye appropriate amount Antioxidant appropriate amount Preservative appropriate amount
Purified water balance part Total 100.0

(Formulation Example 2: Cream Pack)
Vaseline 1.0
Beeswax 3.0
Polyoxyethylene Sorbit Beeswax 2.0
N-stearoyl-L-glutamate sodium 1.0
Glyceryl monostearate 2.0
Polyoxyethylene sorbitan monostearate 1.0
Monooleic acid polyoxyethylene sorbitan 1.0
1,3-butylene glycol 1.0
Polyethylene glycol 10.0
Sorbitol 5.0
Carboxyvinyl polymer 0.5
Xanthan gum 0.3
Potassium hydroxide 0.25
Hydrogenated lecithin 0.5
Glycerin 5.0
Dye appropriate amount Antioxidant appropriate amount Preservative appropriate amount
Purified water balance part Total 100.0

(Prescription Example 3: Makeup Base)
Vaseline 2.0
Beeswax 2.0
Polyoxyethylene sorbit beeswax 1.5
N-stearoyl-L-glutamate sodium 1.5
Glyceryl monostearate 1.0
Trioleic acid polyoxyethylene sorbitan 3.0
Polyethylene glycol 5.0
Dipropylene glycol 5.0
Xanthan gum 0.3
Stearyl alcohol 1.0
Stearic acid 15.0
Hydrogenated lecithin 0.5
Isononyl isononanoate 5.0
Triethanolamine 0.3
Glycerin 5.0
Dye appropriate amount Antioxidant appropriate amount Preservative appropriate amount
Purified water balance part Total 100.0

The emulsified composition for skin of the present invention has excellent usability and moisturizing sustainability, and also has excellent emulsification stability in temperature change, so various emulsified cosmetics such as emulsions, creams, packs, etc. It can use suitably for skin care cosmetics.

Claims (5)

Solid hydrocarbon at room temperature, b c acids, Ri Na contain polyoxyethylene sorbitol beeswax and N- acyl glutamates, wherein the wax is beeswax der Ru dermatological emulsion composition. The weight content ratio of the hydrocarbons solid at room temperature to the waxes ( content of hydrocarbons solid at room temperature: content of the waxes) is 1: 1 to 1: 4. Emulsion composition for skin. Fatty acid ester type nonionic surfactant comprising claim 1 or 2 dermatological emulsion composition according to. The emulsion composition for skin according to claim 3, wherein the fatty acid ester type nonionic surfactant is a glycerin fatty acid ester which may be polyoxyethylene-added and / or a sorbitan fatty acid ester which may be polyoxyethylene-added. . The emulsified composition for skin according to any one of claims 1 to 4 , comprising a polyhydric alcohol.