JP6126825B2 - Skin cosmetics - Google Patents

Description

  The present invention relates to a skin cosmetic.

  In general, an emulsion or cream emulsion is used to care for a large area such as the body. However, these preparations do not have sufficient spread over the area that the user wants to apply. Therefore, the user repeats the operation of spreading the agent for the hand many times. In addition, such a preparation tends to become uneven in the process of spreading, and the stickiness after application is worrisome. On the other hand, the skin lotion-type solubilized preparation can give a fresh feel, but its viscosity is low, so it is difficult to handle and the care effect is weak.

  In response to such a problem, Patent Document 1 (Japanese Patent Laid-Open No. 2001-48742) proposes a cosmetic material that has light elongation and spread by making the oil and fat into a foam.

  Patent Document 2 (Japanese Patent Laid-Open No. 10-273415) discloses a technique that achieves both good foaming and foam disappearance by putting a liquid containing a surfactant and a polymer into a discharge container to form a foam. Has been.

  In Patent Document 3 (Japanese Patent Application Laid-Open No. 2004-300909), a combination of an ethylene oxide / propylene oxide polymer (EO / PO), a polymer of butylene oxide and a water-soluble polyhydric alcohol, an effect of improving rough skin, and an effect of suppressing wrinkles. Cosmetics that are excellent and give skin elasticity are disclosed.

JP 2001-48742 A JP-A-10-273415 JP 2004-300909 A

  However, in the technique described in Patent Document 1 described above, since the amount of the surfactant is small, a technique mainly centering on a foam-like aerosol product is described. Since aerosol products use propellants, there are restrictions on handling and disposal.

  Moreover, in the technique described in Patent Document 2, when an operation is performed in which a bubble taken in a hand is sandwiched between both hands and spread, the bubble is crushed. Therefore, it was difficult to apply to a large area in the application scene.

  Further, Patent Document 3 mentions a skin care effect by a combination of ethylene oxide / propylene oxide polymer (EO / PO), butylene oxide, and a general water-soluble polyhydric alcohol. However, there are problems in terms of elongation during coating, coating operation, and unevenness of the agent.

  That is, the present invention can be made into a firm foam shape at the time of use, can be easily applied to a large area of the body, and gives a smooth coating feeling without stickiness to the user when coating and drying. The present invention relates to a skin cosmetic that gives a sense of care.

The present invention
The present invention relates to a skin cosmetic filled in a non-aerosol type foam discharge container, and relates to a skin cosmetic containing the following components (A) to (C).
(A) One or two selected from the group consisting of polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester and polyoxyethylene hydrogenated castor oil It is a nonionic surfactant containing at least one species, and if it is one type of nonionic surfactant, it is HLB 9 or more and 20 or less, and if it contains two or more types of nonionic surfactant, the mixed HLB is 9 or more and 20 A nonionic surfactant which is:
(B) one or more polyalkylene compounds represented by the following general formula (I) or (II):
R ₁ O — [(PO) _a (EO) _b ] —R ₂ (I)
(In the general formula (I), PO represents an oxypropylene group;
EO represents an oxyethylene group;
a and b are the average number of moles added, 1 ≦ a ≦ 70 and 1 ≦ b ≦ 70, respectively;
R ₁ and R ₂ are independently a hydrogen atom or a hydrocarbon group having 3 or 4 carbon atoms, and at least one of R ₁ and R ₂ is a hydrocarbon group having 3 or 4 carbon atoms. )
X (O-[(PO) _m (EO) _n ] -BOH) _l (II)
(In the general formula (II), PO represents an oxypropylene group;
EO represents an oxyethylene group;
BO represents a oxyalkylene group having 4 carbon atoms;
l represents a number from 3 to 9;
m and n are the average added moles of PO and EO, respectively, and 0.5 ≦ m ≦ 10 and 1 ≦ n ≦ 20;
PO and EO may be added in a random or block form. X represents a residue excluding the hydroxyl group of the compound having 3 to 9 hydroxyl groups. ) And (C) water.
Here, the total amount of the component (A) and the component (B) in the skin cosmetic is 1% by mass or more and 10% by mass or less, and the mass ratio (A) of the component (A) and the component (B). / (B) is 8/1 to 1/9.
Moreover, according to this invention, the usage method of the skin cosmetics which discharge the skin cosmetics in the said this invention from a foam discharge container, and apply | coat to skin is provided.

  According to the present invention, it can be made into a firm foam shape at the time of use, can be easily applied to a large area of the body, and gives a smooth coating feeling without stickiness to the user during application drying, It is possible to obtain a skin cosmetic that gives a sufficient feeling of care.

Hereinafter, this embodiment will be described.
The skin cosmetic in this embodiment contains the following components (A), (B) and (C), and is filled in a non-aerosol type foam discharge container.

(Ingredient (A))
Component (A) is from the group consisting of polyoxyethylene (hereinafter also referred to as polyoxyethylene: POE) fatty acid ester, POE sorbitan fatty acid ester, POE glycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester and POE hydrogenated castor oil. When one or two or more kinds of nonionic surfactants are selected, and one kind of nonionic surfactant, HLB is 9 or more and 20 or less, and when two or more kinds of nonionic surfactants are included It is a nonionic surfactant having a mixed HLB of 9 or more and 20 or less.
One or two or more nonionic surfactants selected from the group consisting of POE fatty acid ester, POE sorbitan fatty acid ester, POE glycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester and POE hydrogenated castor oil, It is preferable to have an alkyl group having 10 to 22 carbon atoms in the molecular structure.

  In general, aerosol preparations are used to discharge skin care preparations as foam. In this technique, a liquefied gas that suddenly volatilizes and expands at atmospheric pressure is enclosed in a can together with a preparation, and foamed by releasing the pressure all at once by discharge. Therefore, the prescription itself does not have to be foamed, and if it can be mixed with the liquefied gas even temporarily, it can be foamed with a wide range of compositions regardless of the emulsified and solubilized composition.

  On the other hand, when foam is put in a foam discharge container such as a pump former, a liquid-liquid interface is formed by passing the mesh while entraining the air during the discharge process. It is necessary to have sex. At that time, it is important that the surfactant is rapidly supplied from the preparation and rapidly adsorbed on the gas-liquid interface to reduce the interfacial tension against the rapid formation of the gas-liquid interface by the former. Therefore, as a component (A), it is necessary to mix | blend surfactant with high solubility in water in the state which works effectively from surfactant which can be used for skin care products, such as a lotion and an emulsion. Therefore, the nonionic surfactant has an HLB number of 9 or more. Moreover, when a component (A) contains several nonionic surfactant, it is important to adjust so that it may become 9 or more by the HLB number of mixing. Moreover, it is preferable that the state of a formulation is 1 liquid phase which exhibits a transparent-translucent external appearance. Foamability may be reduced in a cloudy emulsion or solid dispersion that is clearly in a two-phase separation state, or in a system that forms a liquid crystal or gel in which surfactants are infinitely associated.

When the component (A) is one and is HLB 9 or more and 20 or less, the following components may be mentioned. In addition, the following component can use 1 type (s) or 2 or more types.
As the POE fatty acid ester having an alkyl group having 10 to 22 carbon atoms, each of lauric acid, myristic acid, coconut oil fatty acid, stearic acid, isostearic acid and oleic acid having a polymerization degree of EO (ethylene oxide) of 8 to 20 Examples include esters. Furthermore, esters of lauric acid, myristic acid and coconut oil fatty acid having a polymerization degree of EO (ethylene oxide) of 8 to 20 are preferred. Furthermore, lauric acid PEG12 (14) is preferable. In addition, in the above, the number in () represents the number of HLB.

  As POE sorbitan fatty acid ester having an alkyl group having 10 to 22 carbon atoms, each of lauric acid, myristic acid, coconut oil fatty acid, stearic acid, isostearic acid and oleic acid having an EO (ethylene oxide) polymerization degree of 6 to 20 mol Sorbitan esters; sorbitan esters of tristearic acid and trioleic acid having an EO (ethylene oxide) polymerization degree of 20 mol. Of these, a monoester composed of a single-chain alkyl group is preferred from the viewpoint of solubility in water. From such points, PEG 20 sorbitan laurate (16.7), coconut oil fatty acid PEG 20 sorbitan (16), PEG 20 sorbitan palmitate (15.6), PEG 20 sorbitan stearate (15), oleic acid PEG 20 sorbitan (15) and the like. Can be mentioned. Furthermore, from the viewpoint of foaming properties, PEG 20 sorbitan laurate (16.7) and coconut oil fatty acid PEG 20 sorbitan (16) are preferred (inside () represents the number of HLB).

Examples of the POE glycerin fatty acid ester having an alkyl group having 10 to 22 carbon atoms include POE glycerin monofatty acid ester, glycerin difatty acid ester, and POE glycerin trifatty acid ester, and monolauric acid having a polymerization degree of EO of 5 to 50, Monomyristic acid, monoglycerin fatty acid ester of monococonut oil fatty acid; Monostearic acid, monoisostearic acid, monooleic acid glycerin fatty acid ester having EO polymerization degree of 8-60; EO polymerization degree of 30-80 Examples include diisostearic acid, dioleic acid, triisostearic acid, trioleic acid and the like.
Among these, POE glycerin monofatty acid ester having a single-chain alkyl group is preferable from the viewpoint of solubility in water, and each glycerin fatty acid ester of lauric acid, myristic acid and coconut oil fatty acid having an EO polymerization degree of 5 to 50 The glycerol fatty acid esters of stearic acid, isostearic acid, and oleic acid having a polymerization degree of EO of 7 to 60 are preferred. Furthermore, PEG12 glyceryl laurate (15), PEG20 glyceryl laurate (16.5), and coconut oil fatty acid PEG7 glyceryl (13) are preferred (inside () represents the number of HLB).

Examples of the polyglycerol fatty acid ester having an alkyl group having 10 to 22 carbon atoms include polyglycerol monofatty acid ester and polyglycerol difatty acid ester, and monolauric acid, monomyristic acid having an average degree of polymerization of glycerol of 3 to 10, Examples include mono palm oil fatty acid, monostearic acid, monoisostearic acid, monooleic acid esters; distearic acid, dioleic acid or diisostearic acid ester having an average degree of polymerization of glycerin of 3 to 10.
Of these, polyglycerin monofatty acid esters having a single-chain alkyl group with an average degree of polymerization of glycerin of 3 to 10 are preferred from the viewpoint of solubility in water. Monolauric acid, monomyristic acid, monococonut oil fatty acid, monostearin And esters of acid, monoisostearic acid and monooleic acid. More preferable is a monoester of lauric acid having an average degree of polymerization of 5 to 10 lauric acid and myristic acid. Tetraglycerin laurate (HLB16), decaglycerin laurate (HLB16.3), tetraglyceryl myristate (HLB15), myristic acid deca Glycerin (HLB15.7) is preferred (inside () represents the number of HLB).

  Examples of the sucrose fatty acid ester having an alkyl group having 10 to 22 carbon atoms include esters of lauric acid, myristic acid, coconut fatty acid, stearic acid, and oleic acid having a monoester content of 50% or more. Among them, sucrose laurate (about 16) and sucrose myristate (about 15 to 16) are preferable from the viewpoint of foaming properties (inside () represents the number of HLB).

  As the POE hydrogenated castor oil having an alkyl group having 10 to 22 carbon atoms, those having a degree of polymerization of ethylene oxide (EO) of 20 to 80 are preferable, and the degree of polymerization of EO is particularly 30 (in terms of solubility in water). The thing of HLB11) -80 (HLB15) is preferable.

  The HLB number of component (A) is preferably adjusted to 10 or more, more preferably 11 or more, from the viewpoint of good foam formation. In addition, when the self-association property is increased, a liquid crystal phase may be formed and foaming may not occur, so it is preferable to select a single-chain structure rather than a multi-chain structure. When two or more kinds of nonionic surfactants are used in combination, it is preferable to use a combination of single chain structures. Furthermore, having a fatty acid ester structure having 12 to 14 carbon atoms (C12 to C14) is preferable from the viewpoint of foam formation. In addition, the component (A) preferably has a hydroxyl group from the viewpoint of easy interaction between the hydrophilic groups of the surfactant on the foam film, specifically, POE glycerin monofatty acid ester, polyglycerin. Mono fatty acid esters, POE sorbitan mono fatty acid esters, and sucrose fatty acid esters having a high mono content ratio are preferred.

In a component (A), when combining 2 or more types of nonionic surfactants, HLB8 or less nonionic surfactants can be used. In this case, the combined HLB is 9 or more and 20 or less in combination with the surfactants of HLB 9 or more listed above.
Specific examples of the nonionic surfactant having an HLB of 8 or less include one or more selected from the group consisting of C16 to C22 glyceryl ether, glycerin fatty acid ester, diglycerin fatty acid ester, and sorbitan fatty acid ester. Nonionic surfactants having an HLB of 8 or less have a greasing effect and can moisturize the skin after application. It is particularly preferred that the number of HLB with high lipophilicity is 2 or more and 5 or less.
Nonionic surfactants having an HLB number of 8 or less include diglycerol monostearate, diglycerol monooleate, and diglycerol monoisostearate (all HLB7);
Nonionic surfactants having an HLB number of 2 or more and 5 or less include sorbitan stearate (HLB5), sorbitan oleate (HLB5), sorbitan distearate (HLB4), isostearyl glyceryl ether (HLB3), glyceryl palmitate (HLB5) Glycerin oleate (HLB3), glyceryl stearate (HLB3), glyceryl behenate (HLB3), and the like.

When combined with one having an HLB number of 2 or more and 5 or less, the solubility of the surfactant in water may decrease, and foaming properties may be reduced. Therefore, the hydrophilic nonionic surfactant used in combination for adjusting the HLB number The HLB number is preferably 14 or more. Further, it is preferable to select an ester-based nonionic surfactant having a single chain having high solubility in water and having a C12 to C14 alkyl group as the hydrophilic nonionic surfactant to be combined. The mixing HLB number is preferably adjusted to 10 or more, more preferably 11 or more.
Component (A) is preferably a combination of two or more nonionic surfactants from the viewpoint of maintaining foamability and providing a moist feel, and is preferably HLB2 or more, HLB8 or less, and further 5 or less. A combination of a nonionic surfactant and a nonionic surfactant having an HLB of 14 or more and 20 or less is preferable. In addition, HLB used by this specification is defined by HLB of Griffin.

  Component (A) is, for example, 0.1% by mass or more, preferably 0.5% by mass or more in the skin cosmetics from the viewpoints of foamability and foam stability, and from the viewpoint of solubilization such as preservatives and perfumes. More preferably, 1 mass% or more is mix | blended. On the other hand, from the viewpoint of suppressing the sliminess during use and the increase in the liquid viscosity at low temperature, for example, it is 9% by mass or less, preferably 5% by mass or less, and more preferably 3% by mass or less.

(Ingredient (B))
Component (B) is one or a combination of two or more (water-soluble) polyalkylene compounds represented by the following general formula (I) or (II). The component (B) has a function of making the foam discharged from the foam discharge container more creamy and making it difficult to be crushed even if the foam is crushed with both hands sandwiched. And since it becomes a uniform film and covers the skin after being applied to the skin, it plays a role of giving the user a skin care feeling by its smooth feel.

R ₁ O — [(PO) _a (EO) _b ] —R ₂ (I)
In the general formula (I), PO represents an oxypropylene group, and EO represents an oxyethylene group.
a is the average number of added moles of oxypropylene groups, and a is 1 or more, preferably 2 or more, 70 or less, preferably 40 or less, more preferably 20 or less. Moreover, b is an average addition mole number of an oxyethylene group, b is 1 or more, Preferably it is 2 or more, 70 or less, Preferably it is 40 or less, More preferably, it is 20 or less. Moreover, it is preferable to set it as the compound which is 1 <= a <= 40 and 1 <= b <= 40 in general formula (I).
a / b is preferably 1/1 or less, and more preferably 1/2 or more. If the ratio of a is too large, the solubility in water may decrease, and the temperature stability may decrease, and if it is too small, the coating feeling will be weakened.
Further, (a + b) is preferably 8 or more, more preferably 10 or more, preferably 80 or less, and more preferably 60 or less. When the molecular weight of the component (B) is large, a residual feeling is given and it seems that the familiarity is improved. The order of adding ethylene oxide and propylene oxide is not particularly specified. In addition, the oxyethylene group and the oxypropylene group may be added in a block shape or in a random shape, and those added in a random shape from the point of improving the film feeling are excellent in the film feeling. Therefore, it is preferable.

R ₁ and R ₂ are a hydrocarbon group having 3 or 4 carbon atoms or a hydrogen atom. At least one of R ₁ and R ₂ is a hydrocarbon group having 3 or 4 carbon atoms. Examples of the hydrocarbon group include n-propyl group, isopropyl group, n-butyl group, sec-butyl group, tert-butyl group and the like. A butyl group is preferred. It is preferable that either _one of R ₁ and R ₂ is a hydrogen atom. Specific examples of the component (B) include polyoxyethylene (9) polyoxypropylene (10) butyl ether (NOF Corporation: UNILOVE MB-11), polyoxyethylene (17) polyoxypropylene (17) butyl ether ( Company: Unilube MB-26).

X (O-[(PO) _m (EO) _n ] -BOH) _l (II)
In the general formula (II), PO represents an oxypropylene group, and EO represents an oxyethylene group. PO and EO may be added in a random or block form. BO represents an oxyalkylene group having 4 carbon atoms, and examples thereof include an oxybutylene group, an oxyisobutylene group, an oxytetramethylene group, and an oxy t-butylene group. An oxybutylene group is preferred.

X is a residue excluding the hydroxyl group of the compound having 3 to 9 hydroxyl groups, and l is the number of substituents (O — [(PO) _m (EO) _n ] —BOH), which is 3 to 9. . Examples of the compound having 3 to 9 hydroxyl groups include, if l = 3, compound X is glycerin, trimethylolpropane, and if l = 4, compound X is erythritol, pentaerythritol, sorbitan, alkylglycoside or diglycerin. , L = 5, compound X is xylitol, l = 6, compound X is dipentaerythritol, sorbitol, or inositol, l = 8, compound X is sucrose or trehalose, and l = 9, compound X X can select maltitol.
Among these, X is preferably 3, and more preferably glycerin.

  m is the average number of moles of PO added, and 0.5 ≦ m ≦ 10, preferably 1 ≦ m ≦ 5. n is the average added mole number of EO, and 1 ≦ n ≦ 20, preferably 2 ≦ n ≦ 10. If the average added mole number m of PO is too small, the film feeling is lowered, and if it is too large, the temperature stability is lowered. On the other hand, if the average added mole number n of EO is too small, the solubility in water decreases, and if it is too large, a sticky feeling is produced.

Further, m / n is preferably 1/1 or less, and more preferably 2/3 or less. If m is too large, the solubility in water is lowered, and the temperature stability may be lowered. From the viewpoint of temperature stability, it is more preferable that the compound is 1 ≦ m ≦ 5 and 2 ≦ n ≦ 10 in the general formula (II), and m / n is 2/3 or less.
Further, the oxyethylene group and the oxypropylene group may be added in a block form or in a random form, but those added in a random form are preferable because of excellent coating feeling.
In addition, from the viewpoint of obtaining a residual feeling and obtaining a good familiar feeling, (m + n) is preferably 2 or more, and more preferably 3 or more. Further, from the viewpoint of suppressing stickiness, (m + n) is preferably 30 or less, and more preferably 15 or less. Specifically, n = 1.67, m = 2.67, l = 3, polyoxybutylene (3) polyoxyethylene (8) polyoxypropylene (5) glyceryl ether in which X is glycerin (for example, And NOF Corporation: Wilbright 753S).

  Component (B) is blended, for example, in an amount of 0.1% by mass or more, preferably 0.2% by mass or more, and more preferably 0.3% by mass or more in the skin cosmetic from the viewpoint of the foaming effect. On the other hand, from the viewpoint of suppressing stickiness caused by the residual feeling, for example, it is 9% by mass or less, preferably 5% by mass or less.

  The component (A) is mixed with the component (B) to foam, and has a function of promoting foam film formation. Due to the action of the component (A), the foam becomes difficult to disappear when the skin cosmetic is spread on the palm.

The inventor then combines a specific nonionic surfactant of component (A) and component (B), which is a water-soluble alkylene compound having a short-chain alkyl group at the terminal, in a specific ratio to produce a pump former. It has been discovered that when discharged in a container, a clear foaming improvement and foam stability that have not been seen before are produced.
The compound of the component (B) which is water-soluble but weakly amphiphilic is dissolved in water because the alkyl group is too short to form micelles. Therefore, it is considered that the adsorption rate at the interface is fast, and the loss of the interface is prevented by compensating for the adsorption delay of the nonionic surfactant against the rapid increase in the gas-liquid interface at the pump former.
With this discovery, by combining a nonionic surfactant (component (A)) that is highly safe to the skin and a component (B) that is a compound having a protective effect on the skin, for example, with both hands Even after the operation of sandwiching and spreading to the palm of both hands, it is possible to maintain a good foam and to spread it over a wide area such as the body. Moreover, after application | coating, stickiness was suppressed and it came to obtain the formulation which can fully obtain the actual feeling that the smooth film feeling remained and was skin-care.

Furthermore, when this preparation is used without being washed away, the feel remaining on the skin is greatly influenced by the total amount of the component (A) and the component (B) ((A) + (B)). . At this time, (A) + (B) is 1% by mass or more, preferably 2% by mass or more, preferably 10% by mass or less, and preferably 5% by mass or less.
While satisfying the above range for (A) + (B), component (A) and component (B) have a mass ratio of (A) / (B) = 8 for good foamability and foam stability. / 1 to 1/9. Furthermore, it is preferable to use at a ratio of (A) / (B) = 7/1 to 1 / 2.5 from the viewpoint of imparting a high film feeling and enhancing the protective feeling of the skin.

Component (C) is water.
Since the foam is a gas-liquid interface partitioned by a double membrane of surfactant, water is an essential component for orienting the surfactant and maintaining adsorption to the membrane. For example, the water can be the balance excluding other components in the entire composition. Moreover, 70 mass% or more of water is contained, for example. Preferably, 80% by mass or more is contained. 99% or less is preferable, as for content of a component (C), More preferably, it is 98 mass% or less, More preferably, it is 90 mass% or less.

  Moreover, in this embodiment, it is preferable that components to be blended other than water are dissolved or finely dispersed in water. When an apparent phase separation state (for example, an emulsified state) occurs, there is a concern that the adsorption of the surfactant to the gas-liquid interface is inhibited, leading to defoaming. The preferable state here is to exhibit a transparent to translucent appearance. Experimentally, when 550 nm light is measured at a cell length of 10 mm, 90% or more is transmitted. % Or more.

  The skin cosmetic containing the above components (A) to (C) is used by being filled in a non-aerosol type foam discharge container.

The skin cosmetic containing components (A) to (C) is filled in a foam discharge container. The foam discharge container usually has a porous film, and examples of the porous film include a sponge, a sintered body, and a net. Among these porous membranes, if the cosmetic composition remaining on the membrane dries and solidifies, clogging occurs by the flow of bubbles at the next discharge, which immediately dissolves the solidified material and eliminates clogging. Since it can do, the net | network which is thin is preferable. The net is preferably 50 to 500 mesh, and particularly preferably 200 to 400 mesh in order to produce good foam. Moreover, nylon, polyester, etc. are mentioned as a preferable material of such a mesh.
Further, the foam discharge container preferably has a plurality of such films, and in particular, from the viewpoints of economy, foam stability, and the like, it is preferably two.

Further, the foam discharge container may be any one as long as it mixes a certain amount of the cosmetic composition with a certain amount of air and discharges it as a foam state. Japanese Utility Model Publication No. 58-174272, Japanese Utility Model Publication No. 62. No. 42787, Japanese Patent Publication No. 52-16567, etc., and a squeeze foamer used by pressing the torso of a soft container with fingers; and Japanese Utility Model Publication No. 3-7963, Japanese Utility Model Publication 62- No. 103458, JP-A-7-315463, etc., and a pump former used by pressing a pump head (pushing part of a piston) provided with a finger with a finger.

  When a product intended to be applied to the skin is put into a foam discharge container such as a pump foamer and put out as a foam, the material acts to reduce the interfacial tension by quickly adsorbing to a sudden increase in the interface. It is considered necessary to select On the other hand, since it is important not to irritate the skin in skin care products, first, a material that is kind to the skin is first selected. Accordingly, the anionic or amphoteric surfactant used in the cleaning agent is preferably 2% by mass or less, more preferably 1% by mass or less. In general, among the nonionic surfactants, those having a long alkyl group having a carbon number of 12 or more, a large molecular weight, or an ester structure are preferable. These surfactants have high emulsifying ability and solubilizing ability, and are widely used for skin care products regardless of lotion or milky lotion.

  In this embodiment, skin cosmetics may contain components other than component (A)-(C). Hereinafter, other components will be described.

(Component (D))
Component (D) is a higher alcohol or fatty acid, more specifically, a higher alcohol or fatty acid having 10 to 22 carbon atoms and solid at 25 ° C. In the foam skin care product, when the component (D) is added, the agent is concentrated at the time of application to form a higher order structure of the surfactant, giving the skin a firm feeling after application. A feeling improves. Moreover, it has the effect that a smooth feeling continues until the next day by the combination with (E) oily component described later.

  As the component (D), straight chain alcohols are preferable, higher alcohols having 12 to 18 carbon atoms such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, and straight chain lauric acid, myristic acid, palmitic acid, stearic acid, etc. 1 type (s) or 2 or more types chosen from the C12-C18 fatty acid of these can be used. In particular, myristyl alcohol, cetyl alcohol, stearyl alcohol, myristic acid, palmitic acid, and stearic acid are preferable because of their moist feeling.

  The content of the higher alcohol or fatty acid of the component (D) is preferably 0.01% by mass or more, more preferably 1% by mass or less, more preferably 1% by mass or less in the skin cosmetic from the viewpoint of imparting a moist feeling. It is 0.2 mass% or less.

  Component (D) is contained in the skin cosmetic at a ratio such that (D) / (A) = 1/30 to 1/7 in terms of mass ratio of component (D) to component (A). Thereby, a higher moist feeling and a smooth feeling can be obtained. Further, (D) / (A) is preferably blended at a ratio of 1/25 to 1/8.

  Moreover, skin cosmetics can contain the component (E) oil-based component generally used by skin care. At that time, since it is assumed to be foamed, a polar oil that has good compatibility with the nonionic surfactant and is easily solubilized is selected. From the above viewpoint, the inorganic value (IV) / organic value (OV) ratio of the oil component, that is, IOB is 0.3 or more, preferably 0.4 or more, and IOB is less than 0.8. 0.6 or less is preferable. By carrying out like this, it is easy to solubilize and the influence which it has on foam performance can be made small. Specific examples include ester compounds and amide compounds. Here, the IOB means an organic conceptual diagram (Akira Fujita, prediction of organic compounds and an organic conceptual diagram, chemistry area Vol. 11, No. 10 (1957) 719-725) and an organic value. It represents the ratio of values (Inorganic Organic Balance).

  As component (E), for example, olive oil (IOB 0.42, viscosity 73 cps), tri (capryl / capric acid) glycerin (IOB 0.32, viscosity 27 cps), synthesized ceramide-like component N- (hexadecyloxyhydroxy) One or more selected from propyl) -N-hydroxyethylhexadecanamide (IOB0.56, solid) can be used.

  The content of the oily component of the component (E) is, for example, 0.01% by mass or more in the skin cosmetic, for example, 0.3% by mass or less, preferably 0.2% by mass or less, and further preferably 0.2% by mass. It is preferable that it is 05 mass% or less. When there is too much content, it may become cloudy.

Moreover, when foaming property falls by addition of an oil-based component etc., it is preferable to use a small amount of anionic surfactant together. In that case, in view of irritation to the skin and the like, the addition amount of the anionic surfactant is preferably 2% by mass or less in the skin cosmetic. Furthermore, about 0.05-0.5 mass% is optimal.
Specific examples of the anionic surfactant include one or more selected from alkyl ethoxy ether acetates, acylated glutamates, acylated glycine salts, and acylated taurates having an alkyl chain having 12 to 14 carbon atoms. Can be used.

  Moreover, in this embodiment, the skin cosmetic has a polyol having two or more hydroxyl groups in an alkyl group having 3 to 6 carbon atoms (C3 to C6), and a sugar having two or more hydroxyl groups in a monosaccharide or disaccharide sugar skeleton. Alternatively, it may further contain one or more water-soluble humectants selected from the group consisting of sugar alcohols. This component has a function of giving moisture to the skin.

Specific examples of the water-soluble humectant include, for example, ethylene glycol, dipropylene glycol, diethylene glycol, propylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,3-propanediol, isoprene glycol, 1, Polyols such as 2-pentanediol, hexylene glycol, octylene glycol, glycerin; and sugars or sugar alcohols such as xylitol, sorbitol, maltitol, mannitol, sucrose, erythritol, glucose and fructose. Among these, 1,3-butylene glycol, isoprene glycol, 1,3-propanediol, dipropylene glycol and 1,2-pentanediol are preferable. Since these polyols function not only as a humectant but also as a solvent, they have an effect of promoting foaming by promoting dissolution of the component (A) surfactant. Moreover, since these compounds have antibacterial properties, there is an advantage that an antiseptic system with less irritation to the skin can be constructed.

  From the viewpoint of the moisturizing effect on the skin, the water-soluble humectant is blended in the skin cosmetic, for example, 0.5% by mass or more, preferably 1% by mass or more, and more preferably 3% by mass or more. On the other hand, from the viewpoint of suppressing heat sensation during use and stickiness when dried, the water-soluble humectant is, for example, 20% by mass or less, preferably 15% by mass or less, more preferably 10% by mass in the skin cosmetic. The following is blended.

  In the present embodiment, the skin cosmetic further includes components usually used in cosmetics, for example, surfactants other than those described above, water-soluble solvents other than those described above, thickeners, bactericides, moisturizers, wetting agents, and coloring agents. One or two or more components selected from antiseptics, feel improvers, fragrances, anti-inflammatory agents, whitening agents, antiperspirants, ultraviolet absorbers and the like can be appropriately contained.

Next, the manufacturing method of skin cosmetics is demonstrated.
In the present embodiment, the skin cosmetic can be produced by blending and mixing the components in a predetermined order. When the components (A) to (C) are blended, for example, each component is heated to about 80 ° C. after measurement, mixed and stirred to make it uniform. In the case of skin cosmetics containing component (D) or component (E), specifically, among components (A) to (E), each component except component (C) is heated to 80 ° C. and mixed. Stir to homogenize. To this, the component (C) solution heated to about 80 ° C. is added little by little with stirring to make it uniform. Then, it cools to about 25 degreeC, stirring, and manufactures.

  The viscosity of the obtained skin cosmetic is, for example, 0.5 mPa · s or more, 50 mPa · s or less, preferably 40 mPa · s or less, from the viewpoint of improving the foamability by improving the discharge property from the discharge pump. More preferably, it is 30 mPa · s or less.

Moreover, the obtained skin cosmetic can be used, for example, by a method in which the skin cosmetic is discharged from a foam discharge container and applied to the skin. The skin cosmetic in the present embodiment can be easily spread regardless of the face or body, but is particularly useful as a cosmetic for body lotions, hand care agents, etc. applied to a large area.
Further, the skin cosmetic in the present embodiment is, for example, in the form of a foam, can be uniformly applied to a large area of the body, has little stickiness, and can give moisture without worrying about dirt on clothes.
The skin cosmetic in the present embodiment is used, for example, by taking the foam discharged from the foam discharge container, applying it directly to the skin as it is without diluting it with water, spreading it quickly, and applying it well. Moreover, after apply | coating to skin, you may massage the composition well. Basically, it is preferably used in such a manner that it is not washed away with water.

(Examples 1 to 23, Comparative Examples 1 to 9)
Compositions were prepared and evaluated according to the formulations shown in Tables 1-6. The evaluation results are shown in each table. The preparation method and evaluation method of the composition are as follows.

(Method for preparing composition)
A cosmetic composition was prepared by uniformly mixing the components shown in Tables 1 to 6 so that the total amount was 100% by mass.
When the components (A) to (C) were blended, the following procedure was used. That is, each component was weighed and heated to 80 ° C. or higher and stirred. After the solid component dissolved, it was cooled to room temperature. Thereafter, the sample was put in a pump former (manufactured by Yoshino Kogyo Co., Ltd., 160 mL YF-9413, discharge amount 1 mL, expansion ratio 13 times, 300 mesh 2 sheets) as a sample.

  Moreover, when the component (D) or the component (E) was contained in addition to the components (A) to (C), the procedure was as follows. That is, the components (A), (B), (D) or (E) were weighed, heated to 80 ° C. or higher, mixed and stirred. (C) After heating and melt | dissolving component and aqueous components, such as a polyol, at 80 degreeC, after adding to a mixed component of a component (A), (B), (D) or (E) little by little, stirring. Cooled to room temperature. Thereafter, a sample was obtained according to the method described above.

(Evaluation method)
About the obtained composition, the state and the viscosity were evaluated by the following methods.

Measurement of Viscosity Using a B-type (Brookfield) viscometer (digital TVB-10M, manufactured by Toki Sangyo Co., Ltd.) and a rotor M1, measurement was performed at 25 ° C. and 60 rpm for 1 minute.

Evaluation of composition state Using a UV-1800 shimadzu manufactured by Shimadzu Corporation, a sample was put in a cell having an optical path length of 10 mm, and the transmittance at a wavelength of 550 nm was measured. A sample having a transmittance of 90% or more was made transparent, and a sample having a transmittance of 10% or more and less than 90% was made translucent.

Moreover, the following evaluation was performed about what filled the obtained composition into the pump former.
Evaluation of foaming One push of foam was discharged onto the medicine wrapping paper with a pump former. The foam immediately after discharge was visually evaluated in the following five stages.
◎: Uniform and fine ○: Uniform ○ △: Coarse foam is mixed with coarse foam Δ: Foam is coarse and watery ×: Does not become foam

Evaluation of foam glutinous foam (foam that does not collapse even if it is spread with the palm of the hand) After ejecting the foam for one push on the medicine wrapping paper with a pump former, the medicine wrapping paper is folded in half along the diagonal line and the foam is sandwiched and opened. Furthermore, after folding again on the opposite diagonal line of the medicine-wrapping paper, it was opened, and the sandwiched bubbles were evaluated according to the following evaluation criteria. This was evaluated assuming that the foam was sandwiched between both palms and spread in both hands. In this evaluation, it is important to be able to maintain a shape retaining property without being crushed even if it is sandwiched between palms.
◎: Uniform and fine texture is maintained ○: Liquid is not oozed and uniform ○ △: Liquid is slightly oozed and bubbles are slightly rough △: Liquid oozes to become large bubbles ×: Bubbles Is almost gone

Measurement of foam amount The amount of foam (mL) immediately after discharge and after 1 minute was measured by the following method.
The foam for 3 pushes was discharged with a pump former to a 50 mL screw tube (Mighty vial No. 7 manufactured by Maruemu). Tap gently and measure the foam height immediately after. The height of the separated liquid that exudes under the foam after one minute was measured and subtracted from the height of the foam immediately after that to obtain the foam height after one minute. The volume of each was converted into the amount of foam immediately after and after 1 minute. From the water volume measurement, 10 mm = 7.5 mL.

Evaluation of skin feel The evaluation results of foaming and foaming did not become “x”, and skin feeling was evaluated by the following method for an example in which predetermined foaming and foaming were obtained.
The following evaluations were conducted by five expert panelists. A large muscat foam was discharged on the forearm and spread. At that time, the skin feels well, the skin is not sticky after application, the skin is smooth after application, the skin is smooth after application, the skin is smooth after application, and the next day's skin is smooth The presence or absence was evaluated.
The evaluation criteria for each item are as follows.
(Double-circle): Five persons evaluated that it was good, there was no stickiness, or there was a covering feeling, the smoothness of the skin, or the moist feeling of the skin.
○: Four people evaluated that they were good, non-sticky, covered, smooth, or moist.
○ △: Three people evaluated that they were good, non-sticky, covered, smooth, or moist.
(Triangle | delta): One or two persons evaluated that it was good, there was no stickiness, or there was a feeling of covering, the smoothness of the skin, or the moist feeling of the skin.
X: There was no person who evaluated that there was good, no stickiness, a covering feeling, smooth skin or moist skin.

In Tables 1 to 6, the unit of the numerical values of the component blending amounts is mass%. In Tables 1 to 6, the following abbreviations were used.
1,3-BG: 1,3-butylene glycol DPG: dipropylene glycol 1,3-PD: 1,3-propanediol

(Example 24)
Table 7 shows examples of skin cosmetic formulations.

Claims (12)

A skin cosmetic filled in a non-aerosol type foam discharge container, comprising the following components (A) to (C):
(A) One or two selected from the group consisting of polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyglycerin fatty acid ester, sucrose fatty acid ester and polyoxyethylene hydrogenated castor oil It is a nonionic surfactant containing at least one species, and if it is one type of nonionic surfactant, it is HLB 9 or more and 20 or less, and if it contains two or more types of nonionic surfactant, the mixed HLB is 9 or more and 20 A nonionic surfactant which is:
(B) one or more polyalkylene compounds represented by the following general formula (I) or (II):
R ₁ O — [(PO) _a (EO) _b ] —R ₂ (I)
(In the general formula (I), PO represents an oxypropylene group;
EO represents an oxyethylene group;
a and b are the average number of moles added, 1 ≦ a ≦ 70 and 1 ≦ b ≦ 70, respectively;
R ₁ and R ₂ are independently a hydrogen atom or a hydrocarbon group having 3 or 4 carbon atoms, and at least one of R ₁ and R ₂ is a hydrocarbon group having 3 or 4 carbon atoms. )
X (O-[(PO) _m (EO) _n ] -BOH) _l (II)
(In the general formula (II), PO represents an oxypropylene group;
EO represents an oxyethylene group;
BO represents a oxyalkylene group having 4 carbon atoms;
l represents a number from 3 to 9;
m and n are the average added moles of PO and EO, respectively, and 0.5 ≦ m ≦ 10 and 1 ≦ n ≦ 20;
PO and EO may be added in a random or block form. X represents a residue excluding the hydroxyl group of the compound having 3 to 9 hydroxyl groups. ) And (C) water,
Here, the total amount of the component (A) and the component (B) in the skin cosmetic is 1% by mass or more and 10% by mass or less, and the mass ratio (A) of the component (A) and the component (B). / (B) is Ri 8 / 1-1 / 9 der,
When the skin cosmetic further contains an anionic surfactant, the content of the anionic surfactant is 2% by mass or less in the skin cosmetic,
Using a B-type viscometer and rotor M1, 25 ℃, 60rpm, 1 minute viscosity of the skin cosmetic that is measured under conditions of Ru Der below 0.5 mPa · s or more 50 mPa · s.   The skin cosmetic according to claim 1, wherein the nonionic surfactant of component (A) has a fatty acid ester structure having 12 to 14 carbon atoms. The component (B) polyalkylene compound is
A compound in which 1 ≦ a ≦ 40 and 1 ≦ b ≦ 40 in the general formula (I), or 1 ≦ m ≦ 5 and 2 ≦ n ≦ 10 in the general formula (II), and m / n is 2 The skin cosmetic of Claim 1 or 2 containing the compound which is / 3 or less.   The total amount of the said component (A) and a component (B) is 2 mass% or more and 5 mass% or less, The skin cosmetics of any one of Claims 1-3.   The skin cosmetic according to any one of claims 1 to 4, wherein a mass ratio (A) / (B) of the component (A) and the component (B) is 7/1 to 1 / 2.5.   Furthermore, skin cosmetics of any one of Claims 1-5 which contain 0.01 mass% or more and 1 mass% or less of the higher alcohol or fatty acid of a component (D).   The skin cosmetic according to claim 6, wherein a mass ratio (D) / (A) of the component (D) to the component (A) is 1/30 to 1/7.   The nonionic surfactant of the component (A) includes two or more kinds of nonionic surfactants, the mixed HLB is 9 or more and 20 or less, the HLB is 8 or less, and the glyceryl ether having 16 to 22 carbon atoms and the glycerin fatty acid. The skin cosmetic according to any one of claims 1 to 7, comprising one or more selected from the group consisting of esters, diglycerin fatty acid esters and sorbitan fatty acid esters.   9. The component according to claim 1, wherein the component (B) is represented by the general formula (II) and is polyoxybutylene (3) polyoxyethylene (8) polyoxypropylene (5) glyceryl ether. Skin cosmetics.   Furthermore, the skin cosmetics as described in any one of Claims 1-9 which contain 0.01 mass% or more and 0.3 mass% or less of the oil-based component of a component (E). The skin cosmetic according to claim 10 , wherein the IOB of the oil component of the component (E) is 0.3 or more and less than 0.8.   The usage method of the skin cosmetics which discharge the skin cosmetics as described in any one of Claims 1-11 from a foam discharge container, and apply | coat to skin.