JP5656272B1 - Cleansing composition and cleansing article - Google Patents

Abstract

The present invention provides a cleansing composition and a cleansing article excellent in the effect of removing dirt. A cleansing composition comprises an oily phase having an average particle size of 5 μm or more, an aqueous phase, and a heavy vesicle having closed vesicles or hydroxyl groups formed by an amphiphile that spontaneously forms closed vesicles. And an O / W emulsion. The average particle size of the oil phase is preferably 20 μm or more. Moreover, it is preferable that content of the oil in the said composition with respect to the mass of the whole composition is 15 mass% or more. [Selection figure] None

Description

  The present invention relates to a cleansing composition and a cleansing article.

  Since cosmetics are used on the skin throughout the day, they are devised so that they do not easily fall off due to factors such as sweat and sebum. Specifically, a device for preventing makeup from being removed by sweat by containing an oily base, a device for preventing makeup from being removed by physical factors by being used in close contact with the skin, and the like have been made. Therefore, in general, cosmetics are often difficult to remove with ordinary soap. Therefore, a dedicated cleansing composition that dissolves and removes the cosmetic oil is widely used.

  For example, Patent Document 1 discloses a cleansing composition containing an ester oil, a polyol and an ether of polyoxyalkylene glycol, a surfactant, and a diol. Patent Document 2 discloses a cleansing composition containing a liquid oil, two types of nonionic surfactants, and an anionic surfactant.

  By the way, a surfactant is generally used for emulsification, but a three-phase emulsification method (see Patent Document 3) is known as an emulsification method different from that. The three-phase emulsification method is a method in which emulsification is maintained by van der Waals force acting between particles of a closed condensation vesicle formed of an amphiphilic substance or a polycondensation polymer having a hydroxyl group and an oil phase.

JP 2010-090111 A JP 2011-246404 A Japanese Patent No. 3855203

  As described above, as conventional cleansing compositions, many emulsions using a surfactant have been used. In conventional cleansing compositions, the surfactant plays an important role in removing dirt. That is, the surfactant adsorbs to the dirt together with the oil agent to become united and separates the dirt from the skin surface, so that the dirt can be removed by rinsing it. On the other hand, in the three-phase emulsification method, nanoparticles, not surfactants, play a role as emulsifiers, but as described above, the properties of nanoparticles are completely different from surfactants. Therefore, even if an emulsion obtained by the three-phase emulsification method is used as a cleansing composition, it has been unclear whether or not it exhibits a cleansing effect against stains such as make-up like a surfactant.

  This invention is made | formed in view of the above situation, and it aims at providing the cleansing composition and cleansing article excellent in the effect which removes dirt.

  As a result of intensive studies, the inventors have found that the oil phase of the emulsion by the three-phase emulsification method has a specific particle size, so that the emulsion by the three-phase emulsification method exhibits an excellent cleansing effect, The present invention has been completed. Specifically, the present invention provides the following.

  (1) an oil phase having an average particle diameter of 5 μm or more, an aqueous phase, particles of a polycondensation polymer having closed vesicles or hydroxyl groups formed by amphiphiles that spontaneously form closed vesicles; A cleansing composition comprising an O / W emulsion.

  (2) The cleansing composition according to (1), wherein the average particle size is 20 μm or more.

  (3) The cleansing composition according to (1) or (2), wherein the content of oil in the composition is 15% by mass or more with respect to the mass of the entire composition.

  (4) A cleansing article in which the cleansing composition according to any one of (1) to (3) is contained in a glass container or a polyethylene terephthalate container.

  ADVANTAGE OF THE INVENTION According to this invention, the cleansing composition and the cleansing article excellent in the effect which removes dirt can be provided.

  Hereinafter, although embodiment of this invention is described, this invention is not limited to this.

<Cleansing composition>
The cleansing composition of the present invention comprises a polycondensation polymer particle (hereinafter referred to as “polycondensation polymer”) having an oil phase having an average particle diameter of 5 μm or more, an aqueous phase, and a closed endoplasmic reticulum formed by an amphiphile or a hydroxyl group. O / W-type emulsion including “particles”).

  In the present invention, the oil phase refers to encapsulated droplet-like oily components in the O / W type emulsion.

  The closed endoplasmic reticulum or polycondensation polymer particle is a particle having a hydrophilic surface, and maintains an emulsified state by being interposed at the interface with the oil phase in the aqueous phase by van der Waals force. This emulsification mechanism is known as a three-phase emulsification mechanism with closed endoplasmic reticulum or polycondensation polymer, and the emulsification mechanism with surfactant, that is, the hydrophilic part and the hydrophobic part are directed to the water phase and the oil phase, respectively, and the oil-water interfacial tension is It is completely different from the emulsification mechanism that maintains the emulsified state by lowering. The reason why the cleansing composition of the present invention is excellent in the effect of removing dirt is estimated as follows.

  In conventional surfactant cleansing compositions, the hydrophobic group portion and oil of the surfactant are adsorbed and mixed into oily soils such as makeup products. By applying an external pressure such as a finger on the surface, the surfactant is adsorbed to the dirt together with the oil agent so as to be united, separating the dirt from the skin surface, and removing the dirt by rinsing the skin surface. it can. The above is considered to be the mechanism by which the cleansing composition with a surfactant exhibits a cleansing effect.

  However, in the cleansing composition with a surfactant, the combined unit consisting of the surfactant, oil and dirt is not completely separated from the skin surface, and the surfactant reduces the interfacial tension. It is considered that a part of the skin surface remains as it is due to the agglomeration and separation force from the skin surface. Further, a part of the surfactant does not function as an emulsifier and is adsorbed to the skin. The dirt and surfactant remaining on the skin can damage the skin, and as a result, can contribute to dry skin and rough skin. In addition, it is difficult for the surfactant to get into the gap between the dirt and the skin, so a large amount of water and friction are required to remove the remaining dirt, which also damages the skin, which in turn causes rough skin and dullness. Can be a factor.

  On the other hand, in the cleansing composition of the present invention, it is considered that the O / W emulsion to which nanoparticles are adhered adheres to oily dirt while maintaining the state. At this time, when the particle size of the oil phase is 5 μm or more, it can exhibit a solvent property that exceeds the repulsive force against the dirt due to the surface potential of the oil phase, so the affinity of the oil phase to the dirt is high. Are united. Thereafter, the cohesive force of the oil phase works by rinsing the skin surface, and dirt can be removed by re-emulsification. Also, closed vesicles or polycondensation polymer particles are highly hydrophilic, so the oil phase re-emulsified by the cohesive force of the oil phase is unlikely to re-adhere to the skin and should be washed away with water. Can do.

  The average particle size of the oil phase in the present invention is not particularly limited. However, when the average particle size of the oil phase is increased, the property of the oil phase as a solvent against the soil is enhanced, so that the effect of removing the stain is improved. In this respect, the average particle size of the oil phase is preferably 5 μm or more, more preferably 20 μm or more, still more preferably 30 μm or more, still more preferably 40 μm or more, still more preferably 50 μm or more, still more preferably 60 μm or more, and 70 μm. The above is even more preferable, 80 μm or more is more preferable, and 100 μm or more is most preferable. Further, as the average particle size of the oil phase increases, the contact property to the bare skin and the contact property to dirt are improved. From this viewpoint, it is preferable that the average particle size of the oil phase is large. On the other hand, when the average particle size of the oil phase becomes large, the emulsion tends to slip in the container when stored in a highly hydrophobic container or the like, and the stability tends to be impaired. From the viewpoint of preventing this, the average particle size of the oil phase is preferably 2000 μm or less, more preferably 1000 μm or less, further preferably 500 μm or less, even more preferably 200 μm or less, and most preferably 150 μm or less. The average particle size of the oil phase is measured with a microscope or ELS-Z (manufactured by Otsuka Electronics Co., Ltd.) in a state where the viscosity of the emulsion is sufficiently low (diluted as necessary).

  Although the oil which comprises the oil phase of this invention is not specifically limited, For example, hydrocarbon oil, ester oil, silicone oil, waxes, fats and oils, higher alcohol, a higher fatty acid etc. are mentioned. These may be used alone or in combination of two or more. It is preferable to include at least one selected from the group consisting of hydrocarbon oils, ester oils, silicone oils, and waxes, because they are particularly excellent in the effect of removing dirt.

  The hydrocarbon oil is not particularly limited, and examples thereof include liquid paraffin, squalane, squalene, liquid isoparaffin, and α-olefin oligomer. These may be used alone or in combination of two or more. Of these, liquid paraffin and squalane are preferred because they are excellent in the effect of removing dirt. Moreover, liquid paraffin and squalane are also preferable in terms of high contact with dirt. Moreover, hydrocarbon oil is preferable in terms of excellent moisturizing properties, and is also preferable in terms of excellent compatibility with dirt because of its high affinity with dirt.

  The ester oil is not particularly limited. Recall etc. These may be used alone or in combination of two or more. Of these, ethylhexyl palmitate, tri (caprylic acid / capric acid) glyceryl, triethylhexanoin, and neopentityl glycol dicaprate are preferred because of their excellent effect of removing dirt. In particular, ethylhexyl palmitate is preferred because of its high contact with dirt. Further, tri (caprylic acid / capric acid) glyceryl and triethylhexanoin are preferable in terms of good affinity for sebum dirt. Moreover, ester oil is preferable at the point which is excellent in moisture retention.

  The silicone oil is not particularly limited, and examples thereof include methylpolysiloxane, methylphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, and the like. These may be used alone or in combination of two or more. Of these, methylpolysiloxane is preferred because it has a high effect of removing dirt. In addition, silicone oils having a methyl group such as methylpolysiloxane and methylphenylpolysiloxane are preferable in that they are compatible with dirt.

  Although it does not specifically limit as waxes used for this invention, Jojoba oil, orange luffy oil, etc. are mentioned. These may be used alone or in combination of two or more. Of these, jojoba oil is preferred because of its excellent effect of removing dirt.

  The fats and oils are not particularly limited, and examples thereof include olive oil and the like, and these may be used alone or in combination of two or more.

  The higher alcohol is not particularly limited, and examples thereof include isostearyl alcohol, octyldodecanol, and oleyl alcohol. These may be used alone or in combination of two or more.

  The higher fatty acid is not particularly limited, and examples thereof include isostearic acid and oleic acid. These may be used alone or in combination of two or more.

  As described above, since the oil phase of the present invention has a large average particle size, it easily adheres to the skin and easily moisturizes the skin. However, when the amount of oil increases, the oil itself cannot be further washed away and is applied to the skin. It becomes easy to adhere and moisturizes the skin. Therefore, the content of oil in the composition with respect to the mass of the entire composition is not particularly limited from the viewpoint of imparting moisture retention to the skin, but a larger amount is preferable. Specifically, 15 mass% or more is preferable, 30 mass% or more is more preferable, 40 mass% or more is more preferable, and 50 mass% or more is the most preferable. Moreover, when there is too much quantity of these oils, oil will remain easily on skin and there exists a possibility that rinse property may fall. In this respect, the content of the oil phase with respect to the total mass of the composition is preferably 80% by mass or less, more preferably 75% by mass or less, and still more preferably 70% by mass or less.

  In the case of the cleansing composition of the present invention, it is considered that the O / W emulsion to which the nanoparticles are adhered adheres to oily dirt while maintaining the state of the emulsion. Here, when the interfacial tension of the oil phase in the present invention is high, the oil phase has a strong cohesive force. Therefore, after the oil and dirt are mixed by external pressure such as a finger, the mixture is rinsed with water. It is easy to separate from the surface and re-emulsify. Therefore, it is considered that dirt can be removed by rinsing the skin surface. Further, when the oil phase has a strong cohesive force, it is easy to take in dirt and re-emulsify, and hardly remain on the skin surface. Further, the mixture of oil and soil after re-emulsification becomes a stable emulsified state by being surrounded by closed vesicles or polycondensation polymer particles, and the closed vesicles or polycondensation polymer particles have high hydration power. It is easy to wash off easily when it is washed away. That is, the oil phase in the present invention is more excellent in the effect of removing dirt as the interfacial tension with respect to water is higher. In this respect, the oil phase in the present invention preferably contains one or more oils selected from oils having an interfacial tension with respect to water at 20 ° C. of 20 mN / m or more. From the viewpoint of increasing the cohesive force and enhancing the effect of removing dirt, it is preferable to use oils having an interfacial tension with respect to water at 20 ° C. of 30 mN / m or more, and use oils having 40 mN / m or more. It is more preferable to use oils of 45 mN / m or more. Further, from the viewpoint of increasing the cohesive force and increasing the effect of removing dirt, the interfacial tension of the oil phase with respect to water at 20 ° C. is more preferably 20 mN / m or more, and more preferably 30 mN / m or more. More preferably, it is more preferably 40 mN / m or more, and most preferably 45 mN / m or more. The upper limit of the interfacial tension of the oil phase with respect to the water may be appropriately set according to the purpose, etc., but if the interfacial tension of the oil phase with respect to the water becomes too high, the cohesive force of the oil phase becomes too strong. It is presumed that the compatibility of the lowers. If it is not liquid around the human body temperature, it is presumed that the function as a solvent for oily phase stains will be reduced, so practically it may be, for example, 100 mN / m or less.

  In the present specification, “the oil having an interfacial tension at 20 ° C. of 20 mN / m or more, 30 mN / m or more, 40 mN / m or 45 mN / m or more” means the interfacial tension with respect to water at 20 ° C. Oils whose values when measured alone are 20 mN / m or more, 30 mN / m or more, 40 mN / m or more, or 45 mN / m or more. The measurement of the interfacial tension with respect to water of “oils whose interfacial tension with respect to water at 20 ° C. is 20 mN / m or more, 30 mN / m or more, 40 mN / m or more, or 45 mN / m or more” is 20 ° C., DropMaster (Kyowa Interface) (Measured by Chemical Co., Ltd.) Further, the interfacial tension of the oil phase of the present invention with respect to water is also measured at 20 ° C. by DropMaster (manufactured by Kyowa Interface Science Co., Ltd.).

  Closed endoplasmic reticulum or polycondensation polymer particles are extremely excellent in emulsifying performance. For this reason, the amount of water in the cleansing composition can be widely selected from the range of 0.1 to 95% by mass, and may be appropriately set according to the amount of the oil phase.

  In the present invention, in addition to the particles of the closed vesicle or polycondensation polymer, in the mode of use, a surfactant or an emulsifier may be used in combination or not. However, the surfactant is preferably not contained in a large amount in the present invention because it lowers the oil-water interfacial tension and weakens the cohesive force of the oil phase. In this respect, the content of the surfactant with respect to the mass of the entire composition is preferably 10% by mass or less, more preferably 5% by mass or less, and still more preferably 1% by mass or less. In another aspect, the surfactant imparts irritation to the skin, and in order to further improve safety, the content of the surfactant with respect to the total mass of the composition is preferably 0.1% by mass or less, 0 0.05 mass% or less is more preferable, 0.01 mass% or less is more preferable, and it is most preferable not to contain.

  As the amphiphilic substance in the present invention, a polyoxyethylene hydrogenated castor oil derivative represented by the following general formula 1 or a dialkylammonium derivative represented by the general formula 2, a trialkylammonium derivative, a tetraalkylammonium derivative, A halogenated derivative of a dialkenyl ammonium derivative, a trialkenyl ammonium derivative, or a tetraalkenyl ammonium derivative may be employed.

General formula 1

  In the formula, E, which is the average added mole number of ethylene oxide, is 3 to 100. If E is excessive, the type of good solvent that dissolves the amphiphilic substance is limited, and thus the degree of freedom in producing hydrophilic nanoparticles is narrowed. The upper limit of E is preferably 50, more preferably 40, and the lower limit of E is preferably 5.

General formula 2

  In the formula, R 1 and R 2 are each independently an alkyl group or alkenyl group having 8 to 22 carbon atoms, R 3 and R 4 are each independently hydrogen or an alkyl group having 1 to 4 carbon atoms, and X is F, Cl, Br, I or CH3COO.

  Alternatively, phospholipids, phospholipid derivatives, and the like may be employed. As the phospholipid, among the structures represented by the following general formula 3, DLPC (1,2-Dilauroyl-sn-glycero-3-phospho-rac-1-choline) having a carbon chain length of 12, DMPC (1,2-Dimyristol-sn-glycero-3-phospho-rac-1-choline), DPPC with a carbon chain length of 16 (1,2-Dipalmitoyyl-sn-glycero-3-phospho-rac-1-choline) Can be adopted.

General formula 3

  In addition, among the structures represented by the following general formula 4, DLPG (1,2-Diilauroyl-sn-glycero-3-phospho-rac-1-glycerol) Na salt or NH4 salt, carbon chain of carbon chain length 12 Na or NH4 salt of DMPG having a length of 14 (1,2-Dimyristol-sn-glycero-3-phospho-rac-1-glycerol), DPPG having a carbon chain length of 16 (1,2-Dipalmitoyyl-sn-glycero-3) -Phospho-rac-1-glycerol) Na salt or NH4 salt may be employed.

Formula 4

  The polycondensation polymer having a hydroxyl group may be either a natural polymer or a synthetic polymer, and may be appropriately selected depending on the application. However, natural polymers are preferable from the viewpoint of safety and generally inexpensive, and sugar polymers described below are more preferable from the viewpoint of excellent emulsifying function. The particles include both single particles of the polycondensation polymer and those in which the single particles are connected, but do not include aggregates (having a network structure) before being formed into single particles.

  The sugar polymer is a polymer having a glucoside structure such as cellulose and starch. For example, those produced by microorganisms with some sugars among monosaccharides such as ribose, xylose, rhamnose, fucose, glucose, mannose, glucuronic acid, gluconic acid, xanthan gum, gum arabic, guar gum, caraya gum, carrageenan , Pectin, fucoidan, quinseed gum, tranto gum, locust bean gum, galactomannan, curdlan, gellan gum, fucogel, casein, gelatin, starch, collagen, white jellyfish polysaccharides, methylcellulose, ethylcellulose, methylhydroxypropylcellulose Carboxymethylcellulose, hydroxymethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, hydroxyethylcellulose, potassium Sodium boxymethylcellulose, propylene glycol alginate, cellulose crystal, starch / sodium acrylate graft polymer, semi-synthetic polymer such as hydrophobized hydroxypropylmethylcellulose, polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, polyacrylate, Examples include synthetic polymers such as polyethylene oxide.

  Although the adjustment method of the average particle diameter of the oil phase in this invention is not specifically limited, For example, an average particle diameter can be adjusted by adjusting stirring efficiency.

  The closed vesicles or polycondensation polymer particles have an average particle size of about 8 nm to 800 nm before the formation of the emulsion, but in an O / W emulsion structure, the average particle size is about 8 nm to 500 nm. Since these preparation methods are conventionally known as disclosed in Japanese Patent No. 3855203, etc., they are omitted.

  The amount of the closed vesicle or the polycondensation polymer particles may be appropriately set according to the amount of the oil phase, and is not particularly limited, but may be 0.0001 to 5% by mass in total. Thereby, the emulsified state before use of a cleansing composition can be maintained favorable. Unlike conventional surfactants, closed endoplasmic reticulum or polycondensation polymer particles have excellent emulsifying properties, and therefore 5% by mass or less (specifically, 4% by mass or less, 3% by mass or less, 2% by mass or less, The emulsified state can be maintained even with a small amount of 1.0% by mass or less and 0.75% by mass or less. In addition, all the said amounts are solid content.

  The cleansing composition of the present invention may contain any known ingredients contained in conventional cleansing compositions. For example, you may include a fragrance | flavor, a pH adjuster, antiseptic | preservative, a thickener, a stabilizer, a coloring agent, an antioxidant. However, the present invention is not particularly limited to this and may not be included.

  The cleansing composition can be prepared by mixing a dispersion containing closed vesicles or polycondensation polymer particles with an oil component to form an O / W emulsion. The water-soluble optional component may be added before emulsification or after emulsification.

<Cleansing products>
The present invention includes a cleansing article in which a container is filled with the above-described cleansing composition.

  The material of the container is not particularly limited, and examples thereof include resins such as acrylic, polyethylene terephthalate (PET), polypropylene (PP), and polyester (PE), and glass. However, when the size of the emulsion increases, the emulsion becomes fragile when it collides with the container and receives a physical impact, and the stability of oil floatation and the like is reduced due to the difference in wettability between the container material and the emulsion. . In particular, if the interaction energy between the container material and the closed endoplasmic reticulum or the polycondensation polymer particles is large, the emulsion stability may be deteriorated. Therefore, it is desirable that the container material has a small interaction energy, and glass and acrylic are particularly preferable. In addition, plastic resins are widely used from the viewpoint of damage strength during transportation and weight reduction, but since the interaction energy differs depending on the material of the resin, it is necessary to select an appropriate material. In general, resins with low hydrophobicity also have low interaction energy. Therefore, it is particularly preferable to use polyethylene terephthalate as the plastic resin from the viewpoint of low hydrophobicity.

  EXAMPLES Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to these Examples.

(Evaluation 1)
The cleansing compositions of Examples 1 to 4 and Comparative Example 1 were prepared. Specifically, first, a dispersion of closed endoplasmic reticulum was prepared using dilauroylglutamate ricin Na. Liquid paraffin, triethylhexanoin, cetyl ethylhexanoate, 1,3-butylene glycol, and paraoxybenzoic acid ester were added thereto and stirred to prepare a cleansing composition according to the formulation shown in Table 1. In order to eliminate the influence of the viscosity, appropriate amounts of carboxyvinyl polymer and sodium hydroxide were added, and the viscosity of Examples 1 to 4 and Comparative Example 1 was adjusted to be approximately the same. Moreover, the average particle diameter of the oil phase was adjusted as shown in Table 2 by adjusting the stirring efficiency.

  In order to confirm the familiarity of the cleansing compositions of Examples 1 to 4 and Comparative Example 1 with respect to makeup stains and how they were removed, the following operations were performed to evaluate the stain removability.

  First, make-up was applied to the inner side of the forearm, and the cleansing composition was brought into contact with the make-up with a dropper, and the extensibility (compatibility) was confirmed after 5 seconds. Then, it was left still for 15 minutes, wiped off with Kimwipe, and removed by washing with water.

  The dirt removal property is “◎” when there is no residue in the cuticle (small bulge surrounded by the skin groove) or skin groove (fine groove on the surface of the skin). In the case where there is a residue, “◯” is indicated. In the case where there is no residue in the cuticle and there is a residue in the skin groove, “△” is indicated. The evaluation results are shown in Table 2.

  As shown in Table 2, in Examples 1 to 4 and Comparative Example 1, it was confirmed that the effect of removing dirt was increased every time the average particle size of the oil phase was increased.

  The cleansing compositions of Examples 5 to 8 and Comparative Example 2 were prepared, and the average particle size was changed to evaluate the stain removal property, bare skin contact, and lipstick contact.

  Regarding the preparation of the cleansing composition of Example 5, first, a dispersion of polycondensation polymer particles was prepared from a solution of a hydroxypropylmethylcellulose derivative. Thereto, squalane, 1,3-butylene glycol and p-hydroxybenzoate were added and stirred to prepare a cleansing composition according to the formulation shown in Table 3. In addition, about Examples 5-8 and the comparative example 2, since the viscosity was comparable, the viscosity adjustment by carboxyvinyl polymer and sodium hydroxide addition was not performed.

  For Examples 6 to 8 and Comparative Example 2, the cleansing composition was prepared under the same conditions as in Example 5 except that the average particle size of the oil phase was adjusted by adjusting the stirring efficiency as shown in Table 4. Prepared.

  Evaluation of “skin contact” was performed according to the following criteria.

−: The cleansing composition hardly enters the skin groove.
+ To +++++: The cleansing composition easily enters the skin groove.

  When the cleansing composition easily entered the skin groove, the degree of ease of entry was evaluated as follows.

+: Slightly less amount enters the skin groove.
++: A certain amount enters the skin groove, but takes some time.
+++: A certain amount enters the skin groove and does not take much time.
+++: A large amount enters the skin groove, but takes a little time.
+++++: A large amount enters the skin groove and does not take much time.

  The evaluation of “lipstick contact” was performed with respect to the ease of entering the skin groove of the cleansing composition with the lipstick applied to the skin. The evaluation criteria were the same as the evaluation of “skin contact”.

  Table 4 shows the results of evaluation of dirt removal properties, skin contact, and lipstick contact of the cleansing compositions of Examples 5 to 8 and Comparative Example 2.

  As shown in Table 4, in Examples 5 to 8 and Comparative Example 2, it was confirmed that the effect of removing dirt increased each time the average particle size of the oil phase increased.

  As shown in Tables 2 and 4, the effect of removing dirt with a large oil phase average particle size was high because the properties of the oil phase as a solvent against the oil phase contamination increased when the oil phase average particle size increased. This is thought to be because it became stronger and improved the effect of removing dirt. Also, from Table 4, it was observed that the evaluation of the bare skin contact and the lipstick contact increased as the average particle size of the oil phase increased.

(Evaluation 2)
The oil-water interfacial tension can be one of indices indicating the cohesive force of the oil phase in water. Therefore, various oils (liquid paraffin, squalane, ethylhexyl palmitate, tri (caprylic / capric) glyceryl, triethylhexanoin, neopentyl glycol dicaprate, dimethicone, jojoba oil, olive oil and isostearyl alcohol) The interfacial tension f was measured. The oil / water interfacial tension was measured at 20 ° C. using DropMaster (manufactured by Kyowa Interface Chemical Co., Ltd.). The results are shown in Table 5.

  As shown in Table 5, liquid paraffin and squalane, which are hydrocarbon oils, ethylhexyl palmitate, ester oil, glyceryl tri (caprylate / caprate), triethylhexanoin and neopentychilicol dicaprate, dimethicone, silicone oil It was confirmed that jojoba oil, which is a wax, has a high oil-water interfacial tension. On the other hand, it was confirmed that olive oil, which is an oil and fat, has a low oil-water interfacial tension.

(Evaluation 3)
The cleansing compositions of Examples 9 to 13 were prepared, and each cleansing composition was evaluated for stain removability, bare skin contact, and lipstick contact.

  Regarding the preparation of the cleansing composition of Example 9, first, a dispersion of polycondensation polymer particles was prepared from a solution of a hydroxypropylmethylcellulose derivative. Liquid paraffin, 1,3-butylene glycol and paraoxybenzoic acid ester were added thereto and stirred to prepare a cleansing composition according to the formulation shown in Table 6. In order to eliminate the influence of the viscosity, appropriate amounts of carboxyvinyl polymer and sodium hydroxide were added, and the viscosity of Example 9 and Examples 10 to 13 described later were adjusted to be approximately the same. In addition, the numerical value in Table 6 shows the mass% of each component with respect to the mass of the whole composition.

  For Examples 10 to 13, the oil to be added was changed to the oil shown in Table 6, respectively, and in order to unify the final viscosity, carboxyvinyl polymer and sodium hydroxide were added in appropriate amounts, and the viscosity was adjusted. A cleansing composition was prepared under the same conditions. Moreover, the average particle diameter of the oil phase of Examples 9-13 was adjusted as shown in Table 7 by adjusting the stirring efficiency.

  Table 7 shows the formulations and evaluation results of the cleansing compositions of Examples 9-13.

  As shown in the above examples, in Examples 9 to 13, it was confirmed that the effect of removing dirt was high. From these results, it was shown that liquid paraffin, ethylhexyl palmitate, tri (caprylic acid / capric acid) glyceryl, and squalane are highly effective in removing dirt. Liquid paraffin (Example 9), tri (caprylic acid / capric acid) glyceryl (Example 11), squalane (Example 12), mixed oil of liquid paraffin, triethylhexanoin and ethylhexyl palmitate (Example 13) ) Has also been confirmed to have a high evaluation of lipstick contact, and in particular, a mixed oil of liquid paraffin, triethylhexanoin and ethylhexyl palmitate has a high evaluation of bare skin contact.

(Evaluation 4)
The cleansing compositions of Examples 14 to 21 were prepared, and the stain removability was evaluated for each cleansing composition by the same method as in Evaluation 1 above. In addition, finger slipping, dirt familiarity, and moisture retention were evaluated.

  Regarding the preparation of the cleansing composition of Example 14, first, a dispersion of polycondensation polymer particles was prepared from a solution of a hydroxypropylmethylcellulose derivative. Liquid paraffin, 1,3-butylene glycol and paraoxybenzoic acid ester were added thereto and stirred to prepare a cleansing composition according to the formulation shown in Table 8. In addition, about Example 14 and Examples 15-21 mentioned later, since the viscosity was comparable, the viscosity adjustment by carboxyvinyl polymer and sodium hydroxide addition was not performed. In addition, the numerical value in Table 8 shows the mass% of each component with respect to the mass of the whole composition.

  About Examples 15-21, the cleansing composition was prepared on the conditions similar to Example 14 except the point which changed the oil to add to the oil shown in Table 8, respectively. In addition, the cleansing composition of Examples 14-21 adjusted the average particle diameter of the oil phase in the range of 20 micrometers, respectively.

  The evaluation of finger slipperiness was “◎” when it was very good, “◯” when it was good, “Δ” when it was slightly caught, and “×” when it was bad. In addition, the familiarity with dirt is “◎” when it is very good, “◯” when it is good, “Δ” when normal, and “×” when bad. The moisturizing property is “◎” when there is a moist feeling compared to before applying each cleansing composition, “◯” when there is a moist feeling, “△” when there is no change, and bulkiness (dryness) ) “×” when there is a feeling.

  Table 9 shows the evaluation results of the cleansing compositions of Examples 14 to 21. The oil-water interfacial tension was measured at 20 ° C. with DropMaster (manufactured by Kyowa Interface Science Co., Ltd.).

  As shown in Table 9 above, in Examples 14 to 21, it was confirmed that the effect of removing dirt was high. It was confirmed that the effect of removing dirt was high in hydrocarbon oils, ester oils, silicone oils or waxes, and the oil-water interfacial tension was 20 mN / m or more. In the cleansing compositions of Examples 14 to 21, it is considered that the O / W emulsion to which the nanoparticles are attached adheres to oily dirt while maintaining the state of the emulsion. At this time, when hydrocarbon oil, ester oil, silicone oil, waxes are included in the oil phase, these oils have high oil-water interfacial tension and strong cohesive force, so that the oil and dirt are mixed by external pressure such as fingers. After that, the mixture is considered to be easily separated and re-emulsified from the skin surface. Therefore, it is presumed that the dirt could be removed by rinsing the skin surface. Moreover, since the cohesive force of oil is strong, it is easy to take in dirt and to re-emulsify, and it is hard to remain on the skin surface. Furthermore, the cleansing composition of the present invention becomes a stable emulsified state by the mixture of oil and soil after re-emulsification surrounded by closed vesicles or polycondensation polymer particles, and the closed vesicles or polycondensation polymer particles are water. Because of its high power, it is hard to reattach to the skin when washed with water and is easy to wash off. Thereby, it is estimated that the cleansing composition of Examples 14-21 had a high cleansing effect.

  In addition, the moisturizing effect was high in Examples 14 to 19 and 21, because the amount of oil was as large as 60% by mass, so that even though the cohesive force was strong, a part of the oil adhered to the skin and the skin was moisturizing. It is thought that it is for giving. In Example 20 where the oil is dimethicone, the evaluation is lower than the others because dimethicone itself has a low original moisturizing effect, and the feeling of use such as moisturizing properties is the original nature of the oil phase. It is estimated that it depends.

  Moreover, Examples 14 and 15 in which the oil was a hydrocarbon oil had a high evaluation of dirt familiarity (speed and amount). This is considered to be due to the high affinity with hydrocarbons and the strong cohesive strength of hydrocarbon oils. Of the ester oils, tri (caprylic acid / capric acid) glyceryl (Example 17) and triethylhexanoin (Example 18) originally have a property that is easily adapted to oil stains such as sebum, and the speed is Δ. However, the evaluation of quantity was high. Moreover, in Example 20 containing a silicone oil, the evaluation of the speed of familiarity with dirt was high. This is considered to be because the familiarity with the dirt of dimethicone was good.

  Moreover, in all of Examples 14-20, it was confirmed that evaluation of finger slipperiness was high.

(Evaluation 5)
It was estimated that when the average particle size of the oil phase is increased, the oil phase is likely to collide with the container and the stability is lowered. Therefore, a cleansing composition was filled in a pump container or a squeeze container made of glass, polyethylene terephthalate (PET), polypropylene (PP), or polyester (PE), and stability tests were performed (Examples 22 to 25). . In addition, the cleansing composition of Example 3 which adjusted the average particle diameter of the oil phase to 20 micrometers in the composition of Table 1 in all of Examples 22-25 was used for the cleansing composition.

  In the stability test, the cleansing composition was filled in each container, and after performing air transportation for about 2 hours four times, sensory evaluation was performed. The evaluation criteria is “◎” when there is no change, almost no change, “○” when a slight oil float is observed, and “△” when a slight oil float is observed, and oil float is recognized. “X” was used when it was used.

  Table 10 shows the results of the stability test.

  As shown in Table 10, it was shown that the one filled in the polyethylene terephthalate container had higher stability than the one filled in the polypropylene container and the polyester container. Moreover, it was shown that what was filled into the glass container was still more stable than what was filled into the polyethylene terephthalate container. Thereby, it was shown that the cleansing composition of the present invention improves the stability by filling a glass container or a polyethylene terephthalate container.

Claims (8)

An oil phase having an average particle size of 5 μm or more, an aqueous phase, and particles of a polycondensation polymer having closed vesicles or hydroxyl groups formed by amphiphiles that spontaneously form closed vesicles, A cleansing composition that is an O / W emulsion (excluding an oil phase that is at least partially in the state of lyotropic spherical liquid crystals) . An oil phase having an average particle size of 5 μm or more, an aqueous phase, and particles of a polycondensation polymer having closed vesicles or hydroxyl groups formed by amphiphiles that spontaneously form closed vesicles,
A cleansing composition wherein the oil phase has an interfacial tension with respect to water at 20 ° C. of 20 mN / m or more and is an O / W emulsion. An oil phase having an average particle size of 5 μm or more, an aqueous phase, and particles of a polycondensation polymer having closed vesicles or hydroxyl groups formed by amphiphiles that spontaneously form closed vesicles,
The said oil phase is a cleansing composition which consists of 1 or more types selected from the group which consists of hydrocarbon oil, ester oil, silicone oil, and waxes, and is an O / W type | mold emulsion. The cleansing composition according to any one of claims 1 to 3, wherein the average particle size is 20 µm or more. An oil phase having an average particle diameter of 20 μm or more, an aqueous phase, and particles of a polycondensation polymer having closed vesicles or hydroxyl groups formed by amphiphiles that spontaneously form closed vesicles,
The said oil phase is a cleansing composition which contains 1 or more types of oil selected from the oil whose interfacial tension with respect to water in 20 degreeC is 20 mN / m or more, and is an O / W type | mold emulsion. The cleansing composition according to any one of claims 1 to 5 , wherein the content of oil in the composition is 15% by mass or more with respect to the mass of the entire composition. An oil phase having an average particle size of 5 μm or more, an aqueous phase, and particles of a polycondensation polymer having closed vesicles or hydroxyl groups formed by amphiphiles that spontaneously form closed vesicles, A cleansing article in which a cleansing composition which is an O / W emulsion is contained in a glass container or a polyethylene terephthalate container. The cleansing article according to claim 7, wherein the cleansing composition is the cleansing composition according to any one of claims 1 to 6.