JP6334646B2 - Liquid skin composition - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a liquid external composition for skin, and particularly relates to a liquid external composition for skin that gives a refreshing feeling, has an appropriate viscosity, has no dripping, and has excellent stability.

  Liquid skin preparations such as antiperspirants provide a pleasant refreshing feeling to the skin after application, and also have the effect of suppressing sweating and suppressing body odor, so they can be easily applied to the skin even on the go. In addition, it is desirable to have excellent rapidity and covering properties.

  However, if you take a liquid antiperspirant from a container and apply it to spread on your skin, the antiperspirant often drops from your hand or flows over your skin, making it difficult to apply. Occurs.

  In addition, after applying an antiperspirant, it is common to add a powder to the antiperspirant so that the skin surface feels smooth. If it is placed, it will sink to the bottom of the container containing the antiperspirant, so it is necessary to shake the container well and disperse the powder throughout the antiperspirant before use. . And the act which shakes a container before such use has become an annoying act for the user.

  On the other hand, by adding a thickening agent that thickens by entanglement of polymer chains and increasing the viscosity of the antiperspirant, it is possible to suppress the antiperspirant dripping and powder settling, but it is applied to the skin. The effect of imparting a refreshing sensation that the antiperspirant should originally have, such as slowing the drying rate of the antiperspirant after the treatment, and stickiness after drying, will be significantly impaired.

  For this reason, in liquid skin external compositions such as antiperspirants, by imparting an appropriate viscosity without impairing the effect of imparting a refreshing sensation, there is no dripping and stability with suppressed powder settling. It is important to develop an excellent liquid external skin composition.

JP 2014-65671 A

  The present invention is a stable composition that prevents dripping and suppresses sedimentation of the powder by imparting an appropriate viscosity without impairing the effect of imparting a refreshing sensation required for liquid external compositions such as antiperspirants. It is an object of the present invention to provide a liquid skin composition for excellence in properties.

  As a result of the study of the present inventor in order to solve the above problems, by blending a predetermined amount of monohydric alcohol and a microgel obtained by pulverization of a gel composed of a hydrophilic compound having gelling ability, It has been found that a liquid external composition for skin can be obtained while maintaining excellent refreshing feeling, without dripping, and having excellent stability with suppressed sedimentation of the powder, and the present invention has been completed.

That is, the present invention adds (A) 20 to 60% by mass of a monohydric alcohol, (B) water or an aqueous component, (a) gellan gum, and (b) a gelation accelerator that generates a cation, after heating dissolution, the microgel obtained by pulverizing the obtained standing cryogel, is a liquid composition for external application to skin characterized by containing a.

Furthermore, the present invention is characterized in that (b) the gelation accelerator that generates a cation is one or more selected from the group consisting of calcium salts, magnesium salts, sodium salts, and potassium salts. This is a liquid skin composition for external use.

The present invention further Oite the liquid skin external composition, which is further (C) a liquid composition for external application on the skin which comprises a powder.

The present invention is an antiperspirant, which comprises mixing the liquid-like skin external composition.

The present invention is a deodorant product, characterized by blending the liquid-like skin external composition.

The present invention is a cosmetic which is characterized in that for accommodating the liquid-like skin external composition in a container.

  According to the present invention, since it is possible to impart an appropriate viscosity without impairing the effect of imparting a refreshing feeling, which is required for a liquid external composition such as an antiperspirant, there is no dripping even for hands. A liquid skin composition that can be easily applied to the skin can be provided.

  In addition, according to the present invention, since the state in which the powder is dispersed can be stably maintained for a long period of time, it is possible to save the trouble of frequently shaking the container in order to disperse the powder that has settled on the bottom of the container. .

  The liquid skin external composition of this invention contains (A) 20-60 mass% of monohydric alcohols, and (B) the microgel obtained by the grinding | pulverization of the gel which consists of a hydrophilic compound which has gelling ability.

(A) Monohydric alcohol As the monohydric alcohol used in the present invention, for example, methanol, ethanol, propanol, butanol, pentanol, hexanol, heptanol, octanol and the like can be used, and the number of carbon atoms is 1 to 8, more preferably 1. To 3 monohydric alcohols, and examples thereof include one or a mixture of two or more selected from these.

(B) Microgel obtained by pulverizing a gel comprising a hydrophilic compound having gelling ability In the present invention, a hydrophilic compound having gelling ability is dissolved in water or an aqueous component (heated and dissolved depending on the component). A microgel having an average particle size of 0.1 to 1000 μm obtained by pulverizing a gel formed by placing (or standing cooling) is used.

  Microgel has an effect of improving viscosity by friction between swollen microgel particles, but is thicker when it is applied to the skin than a thickener (thickening compound) that thickens by entanglement of polymer chains. Since it can suppress the sticking, the refreshing feeling is not impaired.

  The hydrophilic compound having gelling ability is not particularly limited as long as it is a water-soluble compound having gelling ability and can be used in the cosmetics and pharmaceutical fields. Specifically, hydrophilic proteins having gelling ability such as gelatin and collagen, hydrophilic polysaccharides such as agar, curdlan, scleroglucan, schizophyllan, gellan gum, alginic acid, carrageenan, mannan, pectin, hyaluronic acid, Hydrophilic hydrophilic polymers such as crosslinked N, N-dimethylacrylamide-2-acrylamido-2-methylpropanesulfonic acid sodium copolymer and sodium acrylate / 2-acrylamido-2-methylpropanesulfonic acid sodium salt copolymer A gelling agent is exemplified. One or two or more hydrophilic compounds having gelling ability can be used.

  These hydrophilic compounds having gelling ability are dissolved in water or an aqueous component (heated and dissolved depending on the component), and then allowed to stand (or left to cool) to solidify to form a gel. In particular, solidification (gelation) after heating and dissolution is preferably left (left) until heating is stopped and the temperature becomes lower than the solidification temperature (gelation temperature).

  The aqueous component is not particularly limited as long as it is an aqueous component that can be used in the cosmetics and pharmaceutical fields. For example, glycols such as 1,3-butylene glycol and propylene glycol, and lower alcohols such as ethanol and propanol. In addition, it is possible to contain components that are generally blended as an aqueous phase component of cosmetics. Specific examples include chelating agents such as metaphosphate and edetate, pH adjusters, preservatives, and the like, but are not limited to these examples.

The gel strength of the gel is not particularly limited as long as the gel itself can maintain its shape and can obtain the microgel of the next step. In the present invention, a gel having a considerably high gel strength can be used. For example, a gel having a jelly strength of 1,000 g / cm ² (day cold water measurement) or a high jelly strength of less than that can be used. A microgel can be obtained even with a very weak gel strength of about 30 g / cm ^{2 in} jelly strength. From the viewpoint of improving usability, a jelly strength of around 100 g / cm ² is preferable.

  In addition to the hydrophilic compound having gelling ability, a thickening compound having no gelling ability may be used in combination for the purpose of changing the feeling of use. Examples of thickening compounds that do not have gelling ability include hydrophilic synthetic polymers such as polyacrylic acid, polyethylene glycol, polyacrylamide, polyalkylacrylamide / polyacrylamide copolymer, carboxymethylcellulose, cationized cellulose, and pluronic, In addition to hydrophilic natural polymers such as xanthan gum, succinoglycan, guar gum and locust bean gum, hydrophilic thickening compounds such as hydrophilic clay minerals such as laponite, bentonite and smectite are exemplified. Moreover, the salt of these compounds can also be used. The gel strength of the resulting gel can be adjusted by using these hydrophilic thickening compounds having no gelling ability. One or more thickening compounds having no gelling ability can be used.

  A gel formed of a hydrophilic compound having gelling ability is crushed by a homogenizer, a disper, a mechanical stirrer, or the like to obtain a microgel having a predetermined average particle size. In the present invention, the average particle size of the microgel is 0.1 to 1,000 μm, preferably about 1 to 300 μm, more preferably about 10 to 200 μm. If the average particle size of the microgel exceeds 1,000 μm, the feel may be poor and there may be a problem in usability. On the other hand, if it is less than 0.1 μm, an appropriate viscosity may not be obtained. The average particle size of the microgel can be adjusted depending on the degree of pulverization. When smoother usability is required, the microgel is sufficiently crushed by high-speed stirring to form a microparticle having a fine particle size. When tactile sensation is required, the degree of crushing is weakened by light agitation to obtain a slightly larger particle size microgel.

  The microgel used in the present invention is obtained by blending (a) gellan gum and (b) a gelling accelerator that generates cations as a hydrophilic compound having gelling ability, and pulverizing the formed gel. Can do.

  As the gellan gum used in the present invention, a heteropolysaccharide having four sugars in which D-glucose, D-glucuronic acid, and L-rhamnose are bound at a ratio of 2: 1: 1 as a repeating unit can be used. As a commercial product of gellan gum, for example, KELCOGEL AFT (CP Kelco) is available.

  (A) The gelation accelerator which mix | blends with gellan gum and (b) produces | generates a cation will not be specifically limited if it has the function to gelatinize gellan gum, For example, calcium salt, magnesium salt , Sodium salt, potassium salt, or dipotassium glycyrrhizinate, trimethylglycine, sodium pyrosulfite, sodium citrate, potassium lactate, etc., which dissolves in water to dissociate the salt. Salt, magnesium chloride salt, sodium chloride salt and potassium chloride salt are preferably used.

  (B) As for the compounding quantity of the gelatinization promoter which produces | generates a cation, 0.001-10 mass% is preferable with respect to the whole cosmetics, and 0.15-50 times quantity is mix | blended by mass ratio with respect to gellan gum. I like it. When the blending amount is less than 0.001% by mass with respect to the entire cosmetic, it becomes substantially difficult to sufficiently gel the entire cosmetic, and when the blending exceeds 10% by mass with respect to the entire cosmetic. When applied to the skin, the feeling of use will be impaired.

  The step for obtaining a microgel was obtained by adding (a) gellan gum and (b) a gelling accelerator that produces a cation to water or an aqueous component, heating and dissolving, and then standing and cooling. It is preferable to pulverize the gel into a microgel, which is dispersed in a monohydric alcohol to obtain a liquid external composition for skin. (A) Gellan gum and (b) a gelling accelerator that generates a cation are heated and dissolved, and then cooled with stirring, and the gel obtained by pulverizing the gel is dispersed in a monohydric alcohol. This is because the viscosity cannot be obtained and it is difficult to suppress dripping of the antiperspirant or the like, which is a problem of the present invention.

  Moreover, the microgel used for this invention can be obtained also by grind | pulverizing the gel obtained by mix | blending (c) agar with water or an aqueous component.

  When (c) agar is used as the hydrophilic compound having gelling ability, (c) agar is added to water, dissolved at room temperature, and allowed to cool, and then the gel is pulverized into a microgel. Is preferably dispersed in a monohydric alcohol to obtain a liquid external composition for skin. If the stirring is continued in the formation process of the gel after the component (c) is dissolved, a predetermined viscosity cannot be obtained even if the mixture is then pulverized and dispersed in a monohydric alcohol, and the antiperspirant that is the subject of the present invention This is because there is a risk that it is difficult to suppress dripping of the liquid.

  In the liquid skin external composition of the present invention, a powder can be further blended as the component (C). In a liquid skin external composition containing a predetermined amount of a monohydric alcohol and a microgel obtained by pulverizing a gel comprising a hydrophilic compound having gelling ability, the refreshing feeling required for an antiperspirant or the like is impaired. In addition, since an appropriate viscosity can be imparted, the state in which the powder is dispersed can be stably maintained for a long period of time.

  Examples of the powder of component (C) include inorganic powders (for example, talc, kaolin, mica, sericite (sericite), muscovite, phlogopite, synthetic mica, red mica, biotite, permiculite, magnesium carbonate, carbonic acid. Calcium, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, barium sulfate, calcined calcium sulfate (baked gypsum), calcium phosphate, fluorine apatite, hydroxyapatite, Ceramic powder, metal soap (eg, zinc myristate, calcium palmitate, aluminum stearate), boron nitride, etc .; Organic powder (eg, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, benzoguanamine Fat powder, polytetrafluoroethylene powder, and cellulose powder, etc.), powders for imparting free flowing and the usability after application is desirable.

  In the composition for external application to the liquid skin of the present invention, as an ingredient that imparts antiperspirant and deodorant functions as an antiperspirant, alum (potassium aluminum sulfate), aluminum hydroxide, aluminum chloride such as aluminum chloride, sulfocolic acid zinc salt Zinc compounds such as zinc oxide, bactericidal components such as benzalkonium chloride, benzethonium chloride, isopropylmethylphenol, and antibacterial zeolite can be blended. Ingredients that do not dissolve in either water or alcohol, such as zinc oxide, can be dispersed and blended in powder form.

  Moreover, the liquid skin external composition of this invention can also mix | blend the component which can be mix | blended with a normal skin external composition in the range which does not impair the effect of this invention. Examples of such components include surfactants, drugs, buffers, fragrances, bactericides, moisturizers, thickeners, pH adjusters, preservatives, antioxidants, chelating agents, whitening agents, and UV absorbers. And coloring materials. These components may be added to either water for dissolving the hydrophilic compound having gelling ability or monohydric alcohol in which the microgel is dispersed.

  The liquid skin composition for external use according to the present invention provides a refreshing feeling and has an appropriate viscosity, so that it does not spill even on the hand and has a characteristic that it can be easily applied to the skin. Can be used. Moreover, if it accommodates in the container provided with the one-touch cap and dispenser, it can utilize as cosmetics which can be carried.

  The liquid external composition for skin of the present invention preferably has a viscosity at 30 ° C. of 1000 mPa · s or more. By maintaining such a viscosity, the liquid can be easily applied to the skin without dripping even for the hand, and when the powder is blended, the sedimentation of the powder can be suppressed.

  The upper limit of the viscosity of the liquid external composition for skin is not particularly limited, and the form of the container to be stored may be selected according to the viscosity. For example, when the viscosity of the liquid external composition is 6000 mPa · s or less, it can be used up to the end with a small remaining amount by being contained in a bottle container, and the usability can be improved. On the other hand, if it is 6000 mPa · s or more, it can be used up to the end by reducing the remaining amount by being accommodated in the tube container, and the portability can be improved.

  Hereinafter, the present invention will be described in more detail with reference to specific examples, but these do not limit the technical scope of the present invention. In addition, the compounding quantity in a following example and a comparative example is the mass% unless it mentions specially.

The method of each evaluation performed about the Example etc. is as follows.
<Evaluation method>
Viscosity: measured with a BL type viscometer.
・ Powder sedimentation: Leave in a glass bottle at room temperature. After one week, it was confirmed that there was no supernatant and that there was no powder layer on the bottom of the bottle.
-Dripping from the hand; 10 panelists actually used and evaluated. 1 to 2 mL was taken on the palm and it was confirmed that it would not spill from the hand when it was applied to the other upper arm.
・ Speed of drying: 10 panelists confirmed the feeling of use.
-Stickiness when drying; 10 panelists confirmed the feeling of use.

The criteria for evaluation in the evaluation items are as follows.
<Evaluation criteria>
○: Excellent (pass), △: Slightly inferior (fail), ×: Inferior (fail)

  Table 1 shows the difference in the viscosity of the liquid skin external composition due to the difference in the production process for obtaining the microgel.

In Example 1, components such as gellan gum, sodium chloride and calcium chloride were added to water, dissolved by heating, and allowed to cool, and then the formed gel was pulverized into a microgel, which was then converted into a monohydric alcohol (ethanol). A step of dispersing and obtaining a liquid external composition for skin is employed. In Comparative Example 1 , the same components as in Example 1 are added to water, dissolved by heating, and then cooled while stirring to pulverize the gel. A process for obtaining a liquid skin composition by dispersing the microgel in monohydric alcohol (ethanol) is employed.

As shown in Table 1, it was confirmed that Example 1 has an appropriate viscosity and can effectively prevent sedimentation of the powder and dripping from the hand. On the other hand, Comparative Example 1 was a result in which sufficient viscosity could not be obtained, and powder sedimentation and falling from the hands occurred.

  Next, a liquid external composition for skin (Examples 2 and 3) in which a microgel obtained by pulverizing a gel formed from a hydrophilic compound is dispersed in a monohydric alcohol and thickened, and a conventional thickener is added to water. Comparative evaluation was carried out on the liquid skin composition for external use (Comparative Examples 2 to 7) thickened by dissolving in the solution.

  Table 2 shows the formulations of Examples 2 and 3 and Comparative Examples 2 to 7. Examples 2 and 3 are both hydrophilic compounds for forming a gel in water as in Example 1 above. After adding and dissolving, and allowing to cool by standing, the formed gel is pulverized to form a microgel, which is dispersed in alcohol to obtain a liquid external composition for skin.

  As shown in Table 2, Examples 2 and 3 have no powder settling or dripping from the hands, and when applied to the skin, the components deposited upon drying on the skin become uneven. There was no twisting out, and it was confirmed that the results were good. In the case of taking a structure filled with microgel in the preparation as in Examples 2 and 3, sedimentation of the powder over time is prevented and no twisting occurs when drying, but Comparative Examples 2 to 7 Thus, when using a conventional thickener that increases the viscosity due to polymer entanglement, it is not possible to suppress powder settling even if the blending amount is increased. It became.

  Table 3 shows the results of studying the blending amount of monohydric alcohol. In each of Examples 2 and 4 to 7, gellan gum and a gelling accelerator (sodium chloride, calcium chloride) were dissolved in the total amount of water in the formulation, and the formed gel was pulverized to obtain a microgel.

  More water and less monohydric alcohol (ethanol) tend to increase the viscosity because the ratio of water constituting the gel to monohydric alcohol increases, but as in Comparative Example 8, monohydric alcohol If it is less than 20%, problems such as slow drying, stickiness, and separation of oil-soluble components such as fragrances during production occur when applied to the skin. On the other hand, as in Comparative Example 9, when the monohydric alcohol exceeds 60%, the amount of water constituting the gel is reduced, so that an appropriate viscosity cannot be obtained. The result was “inferior (failed)”, such as falling.

  Below, the formulation example using the liquid skin external composition of this invention is given. In any of the prescription examples, it was confirmed that an excellent refreshing feeling was obtained, there was no dripping in the hand with an appropriate viscosity, and the state in which the powder was dispersed could be stably maintained for a long period of time. In addition, this invention is not limited only to this illustration.

Formulation Example 1: Deodorant lotion Formulation component Formulation amount (% by mass)
1. Water remaining 2. Edetate 0.1
3. Agar 0.5
4). Alcohol 30.0
5. Nylon powder 3.0
6). Benzalkonium chloride 0.1
7). Sulfocolic acid zinc salt 0.5
8). Perfume proper amount Total 100.0

(Production method)
Formulation components 2 and 3 were added to formulation component 1, dissolved by heating, and then the gel obtained by standing cooling was pulverized and mixed with formulation components 4-8.

Formulation example 2: Deodorant lotion Formulation component Formulation amount (mass%)
1. Water remaining 2. Edetate 0.1
3. Gellan gum 0.3
4). Potassium chloride 0.5
5. Alcohol 50.0
6). Silica 3.0
7). Isopropylmethylphenol 0.1
8). Aluminum hydroxide solution (50%) 3.0
9. Perfume proper amount Total 100.0

(Production method)
The ingredients 2 to 4 were added to the ingredient 1 and dissolved by heating, and then the gel obtained by standing cooling was pulverized and mixed with the ingredients 5 to 9.

Formulation Example 3: Cosmetic liquid Formulation component Formulation amount (% by mass)
1. Water remaining 2. Edetate 0.1
3. Agar 0.7
4). Dipotassium glycyrrhizinate 0.1
5. Alcohol 21.0
6). Hydroxypropyl cellulose 0.5
7). Glycerin 5.0
8). Dipropylene glycol 5.0
9. PEG-60 hydrogenated castor oil 0.2
10. Perfume proper amount Total 100.0

(Production method)
The ingredients 2 and 3 were added to the ingredient 1 and dissolved by heating, and then the gel obtained by standing cooling was pulverized and mixed with the ingredients 4 to 10.

Formulation Example 4: Cleansing Gel Ingredient Ingredient Amount (mass%)
1. Water remaining 2. Edetate 0.1
3. Agar 0.3
4). (Acrylates / Acrylic alkyl (C10-30)) Cross polymer 0.5
5. Potassium hydroxide 0.2
6). Hydroxypropyl cellulose 0.5
7). Alcohol 25.0
8). Cyclopentasiloxane 10.0
9. Glycerin 5.0
10. Dipropylene glycol 5.0
11. PEG-60 hydrogenated castor oil 0.5
12 Perfume proper amount Total 100.0

(Production method)
Compounding ingredients 1 and 5 and 12 are blended by adding compounding ingredients 2 and 3 to a part of compounding ingredient 1, dissolving by heating, then pulverizing the gel obtained by standing and cooling, and dissolving compounding ingredient 4. Mixed.

Claims (6)

(A) 20-60 mass% of monohydric alcohol,
(B) obtained by pulverizing a gel obtained by adding (a) gellan gum and (b) a gelling accelerator that generates a cation to water or an aqueous component, heating and dissolving, and then standing and cooling. Microgel,
Liquid composition for external application to skin characterized by containing a. 2. The gelation accelerator for producing the cation (b) is one or more selected from the group consisting of calcium salts, magnesium salts, sodium salts, and potassium salts. Liquid skin composition for external use . Oite to claim 1 liquid skin external composition, further (C) a liquid composition for external application on the skin which comprises a powder. Antiperspirant, which comprises blending a liquid-like skin external composition according to any one of claims 1 to 3. Deodorant product characterized by formulating a liquid-like skin external composition according to any one of claims 1 to 3. It claims 1 to cosmetics characterized in that accommodated in the container liquid-like skin external composition according to any one of the three.