JP2020050607A - Cosmetic composition and cosmetics including the same - Google Patents

Abstract

To provide a cosmetic composition being sufficiently viscous and stable and having a high ability of dissolving an oil-soluble component, in which the cosmetic composition can be particularly useful as a component of a cleansing product, the cosmetic composition containing a surfactant.SOLUTION: A composition contains (A) fatty acid-N-alkyl polyhydroxyalkyl amide having a specific structure, (B) an anionic polymer having a unit derived from acrylamide alkyl sulfonic acid or salt thereof, and (C) fatty acid ester or aliphatic ether.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cosmetic composition comprising a specific combination of components, in particular, a composition for a cosmetic for application to the skin, and a cleansing cosmetic using the same.

  The general purpose of cosmetics is to protect the face, skin of limbs and the like healthy and to dress beautifully. To that end, cosmetics such as skin creams and lipsticks contain various ingredients for their purposes, such as nutritional supplements for the skin, white pigments, chromatic pigments, and binder components for retaining them. And many of these components are oil-soluble materials. These materials are usually dispersed or dissolved in a medium mainly composed of water, which is coated on the skin by human hands or the like.

  Cosmetics applied to the skin are often cleaned daily with water or detergent. Cleansing the skin is very important, for example for facial care. It must be as effective as possible, because oily residues, such as excess sebum, residues of routinely used cosmetics, and makeup products, especially waterproof products, Because it accumulates in the folds of the skin, plugs the pores of the skin, and can cause the appearance of spots.

Representative performances required for cosmetic cleansing agents include the following.
(1) A variety of substances such as cosmetic ingredients and sebum applied to the skin can be removed and cleaned in a short time with a small amount of a cleansing agent.
(2) The skin and eyes should not be irritated so that unnecessary substances are removed from the skin to prevent the skin from becoming dry.
(3) It can be dissolved or dispersed in a solvent containing water having a cleansing action as a main component.
(4) It has an appropriate viscosity so that it does not hang down because it is placed on the skin and handled with fingers.
(5) Good touch and good feel after use.
(6) Ingredients for cosmetics are easily available, high in safety, and low in price.
(7) In order to clear safety issues such as irritation to the skin and biodegradability, it is particularly preferable that the fatty acid portion in the surfactant is a fatty acid obtained from a fat or oil derived from a natural product for each component. It can be used as it is without being separated.

  Many improvements have been conventionally made for many problems as described above. For example, Patent Literature 1 discloses a skin cleanser using sodium laureth sulfate, N-alkylglucamide, and common salt. It is said that a high viscosity of 500 mPas can be obtained by combining sodium laureth sulfate with sodium chloride, and a cleaner having a good skin sensation can be obtained by using glucamide. Patent Literature 2 describes the use of alkyl glucamide in skin creams and the like.

  However, sodium laureth sulfate used in Document 1 is said to have high permeability to the skin and high irritation to the skin and eyeballs. The main reason is the relatively low molecular weight of sodium laureth sulfate.

  Patent Literature 3 discloses a cosmetic that does not use a surfactant in order to solve the problem of a lauric acid-based surfactant. By combining a polymer containing acrylamide alkyl sulfonic acid as a monomer unit with fats and oils, a high-viscosity lotion, cream, etc. can be obtained without using a lauric acid-based surfactant. However, as will be shown in the examples below, this method does not provide a cleaning effect suitable for cleansing, even though high viscosity is obtained.

  As described above, although the performance is improved for each performance, no means satisfying all the above-mentioned requirements (1) to (7) has been found.

JP, 2006-528188, A JP 2000-297028 A JP 2002-293717 A JP-A-2002-212025

  A first object of the present invention is to prepare a cosmetic composition which has a moderately high viscosity so that it does not easily flow down, is easy to handle with hands and fingers, has low skin and eye irritation, and is excellent in cleansing action. The purpose of the present invention is to provide a composition (cosmetic component) that enables the following.

  A second object of the present invention is to provide a cosmetic component which has high environmental suitability and can provide an inexpensive cosmetic in addition to the above-mentioned properties.

  A third object of the present invention is to provide a cosmetic having the above-mentioned properties, especially a cleansing cosmetic.

  Still other objects of the present invention will be apparent from the following description.

In view of the above situation, the present inventors have made intensive studies to solve the drawbacks of the prior art. As a result, the following findings and guidelines were obtained as ideas for solving the problems of the present invention.
(1) A system using a lauric acid sulfonate surfactant can obtain a cleaning ability and a thickening effect by using salt in combination, but all three requirements including low skin irritation are required. Cannot be satisfied at the same time. Therefore, it was judged that it was difficult to use a low molecular weight sulfonate anionic surfactant and salt in combination to obtain a thickening effect.
(2) In order to obtain a thickening effect, an anionic polymer having an acrylamidoalkyl sulfonic acid structure shown in Reference 3 was tested. A high thickening effect was obtained, but a strong lipophilic property such as lip balm was obtained. It is difficult to remove dirt.
(3) Therefore, the alkylamide compounds of References 1 and 2 were selected as nonionic surfactants and tested in combination with an anionic polymer having an acrylamidoalkylsulfonic acid structure. The phenomenon that the viscous effect was significantly reduced occurred.
(4) The clear reason for the decrease in the viscosity of the above (3) is unknown, but it is because the thickened structure is destroyed by the interaction between the acrylamidoalkylsulfonic acid structure and the alkylamide that exhibit the thickening effect. It was speculated that the action might be caused by the hydroxyl group of the alkylamide.
(5) The present inventors selected a method of adding a third substance as a method for preventing a thickening inhibitory action by an alkylamide, and tested various materials. As a result, by adding a fatty acid ester or an aliphatic ether having a specific structure, the viscosity reduced by the addition of the alkylamide was recovered, and at the same time, the cleaning effect was significantly improved.
(6) The above results are due to the interaction between the polymer having an acrylamide alkylsulfonic acid structure, the alkylamide, and the fatty acid ester or the aliphatic ether, and the fatty acid ester and / or the aliphatic ether is changed to the acrylamide. It was presumed that while maintaining the thickened structure of the alkylsulfonic acid-based polymer, its lipophilic properties played a role in promoting the cleaning of lipophilic stains.
(7) Based on the above findings, the inventors further searched for a more preferable chemical structure and composition for each of the polymer having an acrylamide alkylsulfonic acid structure, acrylamide, fatty acid ester, and aliphatic ether, and reached the present invention.

According to the present invention,
(1) It is easy to handle with a fingertip, is hard to drool, easily removes strongly adhered stains such as lipstick, foams, and provides cleansing excellent in usability.
(2) Since no sulfonic acid surfactant is used, there is little irritation to the skin and eyes, and the safety is high even when used daily.
(3) The above measures can provide not only the use as a cleansing agent but also preferable characteristics as other cosmetic compositions. An oil-soluble substance can be dissolved or dispersed in an aqueous solvent at a high concentration, and a cosmetic with high viscosity and good safety can be obtained.

The photograph of the state of the sample on the skin to which the lipstick was applied is shown.

  That is, the present invention relates to a cosmetic composition comprising at least (A) an alkylamide having a specific structure, (B) an acrylamide having a specific structure, and (C) a cosmetic containing at least a fatty acid ester and / or an aliphatic ether. It is a composition for food. Due to the synergistic effect of these components, it is possible to provide a cosmetic having an excellent washing effect and safety while maintaining a high thickening effect.

The alkylamides as the component (A) of the present invention are represented by the following general formula (1).
Formula (I)

Wherein R ¹ is a linear or branched saturated or unsaturated alkyl group having 6 to 22, preferably 12 to 20, especially 14 to 18 carbon atoms, and R ² is a hydrogen atom or a carbon atom A number 1 to 3, preferably 1 to 2, especially 1 alkyl- or hydroxyalkyl group and Z is 3 to 12, preferably 5 to 10, especially 5 to 8 and 3 to 10 hydroxyl groups; Preferably 3-8, especially 3-6, linear or branched polyhydroxyalkyl groups. A fatty acid-N-alkyl polyhydroxyalkylamide represented by the formula:

  The “cosmetic composition” as referred to in the present invention refers to components (cosmetic ingredients) used for the preparation of cosmetics, especially cosmetics that come into contact with skin and hair. The components (A), (B) and (C) making up the composition together or in different steps in the customary end-use formulation process, each in combination with other necessary components customary for the specific end-use. It is introduced as appropriate to make a cosmetic. Here, “cosmetics” (also referred to as cosmetics and cosmetic products) refers to completed cosmetic products that can be used as they are by consumers.

  As the component (A) represented by the general formula (1) used in the present invention, an amide compound II using a glucose group as Z (hereinafter abbreviated as glucamide) is particularly preferable.

In the above formula (II), R ¹ is a straight-chain or branched saturated or unsaturated alkyl group having 6 to 22, preferably 12 to 20, especially 14 to 18 carbon atoms, and R ² is a carbon atom. It is an alkyl or hydroxyalkyl group having 1 to 3 atoms, preferably 1 to 2, especially 1 atom, especially methyl.

The alkylamides of the above formula (I) or (II) used as component (A) according to the present invention are characterized in that at least ^one compound having ^one or more C18 fatty acid residues R ¹ CO— is based on the total amount thereof. It is preferable that the content is 8% by weight.

The fatty acid portion of the components of the present invention ^{(A) (R 1 CO-)} , particularly preferred are those for the oil derived from plants as a raw material. As one of the reasons, by using plant-derived fats and oils as raw materials, it is excellent in environmental suitability such as biodegradability, and uses the fatty acid obtained by saponifying vegetable oil to produce the alkylamide of the present invention at low cost. That you can do. Such fats and oils derived from natural products include sunflower oil, safflower oil, coconut oil, soybean oil, corn oil, cottonseed oil and the like. Among them, fatty acids obtained from oils and fats containing a large amount of oleic acid and linoleic acid, such as sunflower oil and safflower oil, particularly high oleic oils, are particularly preferable.

  The amount of component (A) in the composition of the present invention will vary somewhat depending on the purpose, but will generally be in the range of 0.5 to 0.5, based on the total weight of components (A), (B) and (C). It can be in an amount of 50% by weight, preferably 10 to 40% by weight, particularly preferably 20 to 35% by weight. If it is lower than this range, the removability and cleaning power of the lipophilic substance decrease, and if it is higher than these ranges, stability such as sedimentation of component A and phase separation may decrease.

  Component (B) of the cosmetic composition of the present invention is at least one anionic polymer containing a structural unit derived from acrylamidoalkylsulfonic acid or a salt thereof, and is preferably a monomer unit of the following formula (III): Can be a polymer containing

(Wherein, R ³ is a hydrogen atom, methyl or ethyl, Y is an alkylene group having 1 to 9 carbon atoms, and X is an ammonium, an alkali metal or an alkaline earth metal ion.)
The component (B) is preferably used as a copolymer obtained by copolymerizing an acrylamide alkyl sulfonate monomer unit of the formula (III) with another monomer unit in order to control water solubility, viscosity and other properties. For example, a copolymer of an acrylamide alkyl sulfonate monomer and N-vinylpyrrolidone is known to have high water solubility and a large thickening effect.

Although a large number of specific compounds of acrylamidoalkylsulfonic acid salts are disclosed in Patent Document 3, a polymer containing a unit derived from an alkali metal salt or ammonium salt of acrylamidoalkylsulfonic acid described in Patent Document 3 Is preferable, and a copolymer of such a unit and N-vinylpyrrolidone is particularly preferable. Among them, in the above formula (III), a polymer containing a unit in which R ⁵ is H, Y is C (CH ₃ ) ₂ CH ₂ and X is sodium is used as the component (B). Is preferred.

The amount of component (B) in the composition of the present invention will vary somewhat depending on the purpose, but will generally be between 0.3 and 0.3 based on the total weight of components (A), (B) and (C). It can be in an amount of 30% by weight, preferably 1 to 20% by weight, particularly preferably 2 to 10% by weight. If it is lower than this range, the required thickening effect cannot be obtained, and if it is higher than these ranges, the stability over time is reduced and sedimentation of the cleansing agent component, phase separation and the like may easily occur.
The preferred weight ratio of component (A): component (B) is 10: 0.01 to 10:10, more preferably 10: 0.05 to 10: 7, and particularly preferably 10: 0.5 to 10: 3. It is.

  The fatty acid esters and aliphatic ethers as the component (C) of the present invention are added for the purpose of improving both the thickening effect and the washing effect by the interaction between the component (A) and the component (B). Ester generally used in cleansing agents has one role of removing oily components, but the fatty acid esters and aliphatic ethers of the present invention have a thickening effect in addition to the removal of oily components. This is a point that is greatly different from the prior art.

  Component (C) of the present invention can be selected from low molecular fatty acid esters. The alcohol moiety of these esters is preferably a linear or branched, saturated or unsaturated, C1-25, more preferably 1-20, particularly preferably 1-8, especially 1-5, carbon atom. Can be alcohol. The fatty acid moieties of the esters are straight-chain or branched, saturated or unsaturated, having 2 or more carbon atoms, preferably 2 to 22, more preferably 6 to 20, especially 10 to 18, especially 12 to 16, carbon atoms. It can be a fatty acid. The fatty acid esters can be monoesters or diesters.

  Preferably, the fatty acid esters (also referred to as ester oils) are selected from the group of esters that do not contain unsaturated bonds and / or do not contain ether and / or hydroxyl groups. Even more advantageously, the ester oil as makeup remover oil is a saturated ester free of ether and / or hydroxyl groups, preferably free of any of these.

Component (C) of the present invention can also be selected from aliphatic ethers. These are ether compounds obtained by condensation between alcohols, and examples thereof include ether compounds of glycols, and compounds in which the hydroxyl group of the ether compound of glycols is further esterified with an organic group. These can be represented, for example, by the following equations.
_{^{R 3 O- (AO) n -R}} 4
A is an alkylene group having 2 to 4 carbon atoms, R ³ and R ⁴ are hydrogen, an alkyl or alkanoyl group having 1 to 4 carbon atoms, provided that one of R ³ and R ⁴ is An alkyl group, and n is a number from 1 to 4.

  The removal effect of the oily substance and the assisting effect of the thickening effect by the component (C) are caused by the action of the lipophilic portion and the hydrophobic portion in the component (C), and the appropriate hydrophilic group in the component (C). It is considered that a hydrophobic group is acting. Therefore, it is preferable to use one or more esters and / or ethers selected from esters and ethers having an appropriate inorganic I / O value (also referred to as IOB value). The I / O value is preferably 0.05 to 2.0, more preferably 0.07 to 1.0, and particularly preferably 0.1 to 0.5.

  Accordingly, fatty acid esters as component (C) in the composition of the present invention include, in particular, 2-ethylhexyl palmitate (or octyl palmitate), 2-ethylhexyl myristate (or octyl myristate), isopropyl palmitate, Isopropyl myristate (I / O = 0.28), diisopropyl adipate, dioctyl adipate, 2-ethylhexyl hexanoate, ethyl laurate, methyl myristate, octyl dodecyl octanoate, isodecyl neopentanoate, ethyl myristate , Myristyl propionate, 2-ethylhexyl 2-ethylhexanoate, 2-ethylhexyl octanoate, 2-ethylhexyl caprate / caprylate, methyl palmitate, butyl myristate, isobut Rumirisuteto, ethyl palmitate, isohexyl laurate, hexyl laurate and isopropyl isostearate, and can be selected from the group comprising mixtures thereof. Examples of the aliphatic ethers include propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, propylene glycol monobutyl ether, and dipropylene glycol butyl ether.

  The amount of component (C) in the composition of the present invention will vary somewhat depending on the purpose, but will generally be in the range of 0.5 to 0.5, based on the total weight of components (A), (B) and (C). It can be in an amount of 80% by weight, preferably 40-75% by weight, particularly preferably 55-70% by weight. If it is lower than this, not only the required performance of removing oily components cannot be obtained, but also a thickening effect cannot be obtained. If it is higher than these ranges, sedimentation of the component (A), phase separation and the like are likely to occur. , And the aging stability decreases.

  The cosmetic composition of the present invention comprises (A) an alkyl amide having a specific structure, (B) an anionic polymer having an acrylamide alkyl sulfonic acid structure as a monomer unit, and (C) By providing the fatty acid esters and / or the aliphatic ethers, the phenomenon that the thickening effect of the component (B) is reduced by the addition of the component (B) is suppressed, the thickening effect is restored, and the component (A) is restored. ) And component (B) alone can remarkably enhance the removal and dissolving power of insufficient oily substances.

  The alkylamide compound (A) having a specific structure and the anionic polymer (B) containing an acrylamidoalkylsulfonic acid structure as a monomer unit are materials which have been widely known since they each have a high function alone. A cosmetic composition combining (A) and (B) has not heretofore been known. The reason is that even if a combination of the components (A) and (B) is conceived, not only the expected thickening effect and cleaning effect are not obtained, but also a phenomenon in which the viscosity decreases, which is generally known. It is presumed that it has not been done.

  The fatty acid esters and the aliphatic ethers used as the component (C) in the composition of the present invention not only reinforce the dissolving power of the lipophilic substance which is insufficient with the component (A) alone, but also enhance the component ( It has the effect of preventing the viscosity lowering effect of A) and achieving the target thickening effect.

  As described above, the combination of the component (A) and the component (B) has not been known so far. Therefore, the composition combining the components (A), (B), and (C) and the function thereof are also conventionally known. unknown. It is understood from the properties of the fatty acid esters and the aliphatic ethers (C) that the solubility of the oily substance is improved, but the thickening effect of the component (B) lost by the addition of the component (A). The detailed mechanism of the revival phenomenon is unknown. The thickening effect of component (B) is understood to increase the viscosity due to the interaction between the polymer in the aqueous medium and / or the interaction between the polymer and water. ) (Alkylamide) and the anionic polymer of the component (B), and it is considered that the viscosity is lowered by the component (A). As will be shown in the examples below, the thickening effect of component (B) alone decreases when component (A) or (C) is added alone, but the components (A), (B) and (C) ) Restores the thickening effect of component (B). From such a phenomenon, it is presumed that the fatty acid esters and the aliphatic ethers reduce the interaction between the components (B) and (A) and restore the original thickening effect of the component (B). .

  In the cosmetic composition of the present invention or a cosmetic product using the same, additional additives can be added in order to exhibit its function. Such additional additives include (D) solvents, (E) additional surfactants, (F) pH adjusters, (G) dyes and pigments, (H) fragrances, (I) preservatives, (J) A) stabilizers, (K) physiologically active ingredients for the purpose of whitening, anti-aging, pore tightening and the like, and (L) plant extracts.

  Additional additives to be added to the compositions of the present invention include (D) solvents first. It serves as a medium for dissolving or dispersing the composition of the present invention, and it is generally considered that water, especially soft water, is preferable for cosmetics. The amount of the solvent to be added is appropriately adjusted according to the product, use conditions, and the like.

  The additional surfactant (E) has a role of assisting a function deficient in the above components (A) to (C), and has, for example, an improvement in stability and an improvement in bubble power. And quaternary ammonium salt compounds such as betaine. In the case of a cleansing agent using the composition of the present invention, the amount of the surfactant (E) can be generally 20 to 80% by weight based on the total weight of the cleansing agent.

  When the composition for cosmetics is used as a cleansing agent, for example, it is considered that the cleansing agent is preferably weakly acidic, and as the pH adjuster (F) therefor, for example, organic acids such as acetic acid, citric acid, succinic acid and tartaric acid, phosphorus An inorganic acid such as an acid can be additionally suitably added so that the pH is 4 to 7, particularly preferably 5 to 6.5.

In the case of a cleansing agent using the composition of the present invention, the ratio of the pH adjusting agent may be generally 2.0 to 20% by weight based on the total weight of the cleansing agent. If the pH value is too high, it causes skin irritation, while if the pH value is too low, it causes skin irritation and the composition may have reduced stability. ) Dyes and pigments (both organic and inorganic dyes) can be selected from the corresponding positive list in the cosmetic regulation or EC list of cosmetic colorants. Also advantageously used are, for example, pearlescent pigments such as pearl essence (mixed crystals of guanine / hypoxanthine from fish scales) and nacre (powder bivalve shells), single crystal pearlescent pigments such as oxychloride Bismuth (BiOCl), layer / substrate pigments such as mica / metal oxide, silver-white pearlescent pigments composed of TiO2, interference pigments (TiO2, different layer thicknesses), color glossy pigments (Fe2O3), and combination pigments ( TiO2 / Fe2O3, TiO2 / Cr2O3, TiO2 / Prussian blue, TiO2 / carmine). The amount of dyes and pigments in the compositions of the present invention can generally be from 0.5 to 10% by weight, based on the total weight of the finished cleansing agent.

  Also, the fragrance (H) used can be a natural fragrance mixture, such as from plant or animal sources, such as pine oil, citrus oil, jasmine oil, lily oil, rose oil or ylang ylang oil. . Relatively low volatile essential oils commonly used as fragrance components, such as sage oil, chamomile oil, clove oil, melissa oil, mint oil, cinnamon leaf oil, linden flower oil, juniper berry oil, vetiver oil, oribanam oil , Galvanum oil and labdanum oil are also suitable as perfume oils. The amount of the perfume (H) can generally be from 0 to 2% by weight, based on the total weight of the finished cleansing agent composition.

  Suitable preservatives (I) are the preservatives listed in the relevant annexes of the European Cosmetic Ordinance, such as phenoxyethanol, benzyl alcohol, parabens, benzoic acid and sorbic acid. A particularly preferred example is 1,3-bis (hydroxymethyl) -5,5-dimethylimidazolidin-2,4-dione (Nipaguard® DMMDH). It can generally be from 0.1% to 2.0% by weight, based on the total weight of the finished cleansing agent composition.

  As a preferable stabilizer (J) for the product using the present invention, various materials suitable for the purpose are used. For example, alcohols such as ethyl alcohol and stearyl alcohol are used in the product in an amount of 0.1 to 5.0. Addition of about% by weight is also performed.

  In the cosmetic composition of the present invention, components (A), (B) and (C) are mixed together with other components as described above, if necessary, using a conventional mixer or the like. Thus, it can be prepared, for example, in the form of an emulsion. In the production of cosmetics using the cosmetic composition of the present invention, conventionally used methods can be used. For example, in the case of a cleansing cosmetic, after dissolving a predetermined amount of the anionic polymer of the component (B) in a predetermined amount of water, a predetermined amount of the alkylamides of the component (A) is added, and then as the component (C). , And then agitating and emulsifying sufficiently. Alternatively, it can be prepared by dispersing a predetermined amount of each of the components (B) and (C) in water, then adding a predetermined amount of the component (A), and sufficiently stirring and emulsifying. The cosmetic composition of the present invention can be used in cosmetics generally at a ratio of 2 to 30% by weight, preferably 3 to 20% by weight, depending on the use.

  The preferred embodiments described above have been described with a focus on cleansing agents. In addition to the cleansing agent, the cosmetic composition of the present invention can be used for skin and hair cleansing agents such as lotions and shampoos, and also for dishwashing.

  The cosmetic composition of the present invention is characterized by dispersing or dissolving oily substances such as sebum, has low skin irritation, and has a large thickening effect. Applications utilizing such characteristics are not limited to the above-mentioned cleaning agents and cleaning agents, and can be widely used for cosmetics for a wider use. For example, it can be suitably used for applications such as skin care creams, sunscreen creams, and shaving soaps.

Therefore, a further object of the present invention is
(A) at least one fatty acid-N-alkyl polyhydroxyalkylamide represented by the formula (I),

Wherein R ¹ is a linear or branched saturated or unsaturated alkyl group having 6 to 22 carbon atoms, and R ² is a hydrogen atom or an alkyl- or hydroxyalkyl group having 1 to 3 carbon atoms. And Z is a linear or branched polyhydroxyalkyl group having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer containing a structural unit derived from acrylamidoalkylsulfonic acid or a salt thereof,
(C) at least one compound selected from the group consisting of fatty acid esters and aliphatic ethers,
, Especially a cleansing cosmetic.

Still another object of the present invention is the following components (A), (B) and (C): (A) at least one fatty acid-N-alkylpolyhydroxyalkylamide of the formula (I),

Wherein R ¹ is a linear or branched saturated or unsaturated alkyl group having 6 to 22 carbon atoms, and R ² is a hydrogen atom or an alkyl- or hydroxyalkyl group having 1 to 3 carbon atoms. And Z is a linear or branched polyhydroxyalkyl group having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer containing a structural unit derived from acrylamidoalkylsulfonic acid or a salt thereof,
(C) at least one compound selected from the group consisting of fatty acid esters and aliphatic ethers,
Is used in cosmetics, especially in cleansing cosmetics.

  The aspects such as the preferred embodiments described above for the cosmetic composition according to the present invention also apply to these cosmetics and uses.

  The present invention will be described in detail by the following examples.

Material used Table 1 shows materials used in Examples and Comparative Examples.

The evaluation method is as follows.
1) Viscosity measurement:
Using a Brookfield viscometer type RV, measure the viscosity after 5 minutes at 25 ° C. and 50 revolutions / minute.
2) Degree of cleaning:
A commercially available lipstick is applied to a 1.5 cm × 1.5 cm area of a human forearm and left for 20 minutes. Then, 1.5 g of each of the formulations of Examples and Comparative Examples was applied to each area, and gently rubbed with a finger so as to massage 30 times. After rinsing well with tap water, gently wipe off the water with a paper towel. The state of cleaning is visually observed.
3) Mild turbidity:
Apply to skin and observe visually.

Comparative Example 1
Ingredient (B) (Aristoflex® Silk) is dropped into water and stirred with a stirrer. After finely dispersing, a solvent (dipropylene glycol) is added and stirred, and then the pH is adjusted with the component (F) (citric acid).

Comparative Example 2
Ingredient (B) (Aristoflex® Silk) is dropped into water and stirred with a stirrer. After finely dispersing, the component (A) (GlucoTain (registered trademark) sense) and a solvent (dipropylene glycol) are added and stirred, and then the pH is adjusted with the component (F) (citric acid).

Comparative Example 3
The component (C) (isopropyl myristate) and the component (B) (Aristoflex® Silk) are mixed, dropped into water, and stirred with a stirrer. After uniformly dispersing, a solvent (dipropylene glycol) is added and stirred, and then the pH is adjusted with the component (F) (citric acid).

Example 1
Mix component (C) (isopropyl myristate) and component (B) (Aristoflex® Silk), and add the mixture dropwise to water and stir with a stirrer. After finely dispersing, the component (A) (GlucoTain (registered trademark) sense) and a solvent (dipropylene glycol) are added and stirred, and then the pH is adjusted with the component (F) (citric acid).

  Table 2 shows the formulations of Comparative Examples 1 to 3 and Example 1 and the evaluation results. In addition, the evaluation result regarding the performance indicates the scores of 1, 2, 3, and 4 in descending order of the grade.

FIG. 1 shows the result of taking a photograph of the state of the sample on the skin to which the lipstick was applied. Each step in the figure indicates the following.
Step 1: A commercially available lipstick is applied to an area of 1.5 cm × 1.5 cm of a human forearm and left for 20 minutes.
Step 2: The appearance when 1.5 g of the prescriptions of the example and the comparative example are applied to each area.
Step 3: The state when rubbing gently so as to massage with fingers 30 times is shown. It can be seen that the formulations of the examples have better affinity for the applied lipstick than the formulations of the comparative examples.
Step 4: After washing thoroughly with tap water, gently wiping off the water with a paper towel is shown. The portion treated in Example 1 can remove the lipstick most clearly.

The following can be said from Table 2 and FIG.
(1) Example 1 containing the components (A), (B) and (C) shows the highest cleaning ability while maintaining a high thickening effect.
(2) The component (B) alone has a large thickening effect, but the cleaning is insufficient (Comparative Example 1), and when the component (A) having a surfactant effect is added thereto (Comparative Example 2), The cleaning capacity is improved, but the viscosity is significantly reduced.
(3) The cleaning ability is similarly improved by the combination of the component (B) and the component (C) (Comparative Example 3), but the viscosity decrease is large.
(4) The above phenomenon is understood to be due to the fact that the intermolecular interaction maintaining the high viscosity of the component (B) is reduced by the addition of the component (A) or the component (C).
(5) The viscosity is greatly improved by adding both components (A) and (C) to component (B). This is because the viscosity maintaining structure of component (B) is It is presumed that the resin is revived by the addition of C).
(6) Example 1 has a greater degree of emulsification than the comparative example. This is because the micelle structure is formed by the interaction of the components (A), (B) and (C), whereby the cleaning ability is improved and the intermolecular interaction for maintaining a high viscosity is increased. It seems to suggest that.

Claims (21)

(A) at least one fatty acid-N-alkyl polyhydroxyalkylamide represented by the formula (I),
Wherein R ¹ is a linear or branched saturated or unsaturated alkyl group having 6 to 22 carbon atoms, and R ² is a hydrogen atom or an alkyl- or hydroxyalkyl group having 1 to 3 carbon atoms. And Z is a linear or branched polyhydroxyalkyl group having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer containing a structural unit derived from acrylamidoalkylsulfonic acid or a salt thereof,
(C) at least one compound selected from the group consisting of fatty acid esters and aliphatic ethers,
A cosmetic composition comprising at least: The cosmetic composition according to claim 1, wherein the at least one fatty acid-N-alkyl polyhydroxyalkylamide (A) includes a fatty acid N-methylglucamide. As the at least one fatty acid-N-alkyl polyhydroxyalkylamide (A), R ¹ is a linear or branched saturated or unsaturated alkyl group having 12 to 20 carbon atoms, and R ² is methyl The cosmetic composition according to claim 1, comprising a fatty acid N-methylglucamide represented by the following formula (II):
The fatty acid moiety (R ¹ CO—) in the at least one fatty acid-N-alkyl polyhydroxyalkylamide (A) is a saturated or unsaturated two or more alkyl having different numbers of carbon atoms and / or double bonds. The cosmetic composition according to any one of claims 1 to 3, which is a mixture of a fatty acid moiety having a group. The at least one fatty acid -N- alkylpolyhydroxyalkylamides (A) the fatty acid moieties in (R 1 ^CO-) are those derived from plants, cosmetic according to any one of claims 1 to 4 Composition. The at least one fatty acid -N- alkylpolyhydroxyalkylamides (A) the fatty acid moieties in (R 1 ^CO-) is sunflower oil, high oleic sunflower oil, safflower oil, high oleic safflower oil, coconut oil The cosmetic composition according to any one of claims 1 to 5, wherein the fatty acid moiety is derived from soybean oil, soybean oil, and / or olive oil. The composition according to any one of claims 1 to 6, wherein component (A) is contained in an amount of 0.5 to 50% by weight based on the total weight of component (A), component (B), and component (C). The composition for cosmetics according to the above. The cosmetic composition according to any one of claims 1 to 7, wherein the acrylamidoalkylsulfonic acid or a salt thereof is an acrylamidomethylpropanesulfonic acid (AMPS) salt. The composition according to any one of claims 1 to 8, comprising component (B) in an amount of 0.3 to 30% by weight based on the total weight of component (A), component (B), and component (C). Cosmetic composition. The cosmetic composition according to any one of claims 1 to 9, wherein the component (C) has an I / O value (IOB value) of 0.05 to 2.0. The cosmetic composition according to any one of claims 1 to 10, wherein the fatty acid ester as the component (C) is an ester of a fatty acid having 10 or more carbon atoms. The fatty acid moiety in the fatty acid ester as the component (C) is caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, pentadecylic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, or two or more of these. The composition for cosmetics according to any one of claims 1 to 11, which is a mixture of the same. The cosmetic composition according to any one of claims 1 to 12, wherein the fatty acid ester as the component (C) is an ester with a monohydric alcohol having 1 to 8 carbon atoms. 14. The composition according to claim 1, wherein component (C) is contained in an amount of 0.5 to 80% by weight based on the total weight of component (A), component (B) and component (C). The composition for cosmetic according to any one of the above. The cosmetic composition according to any one of claims 1 to 14, wherein the weight ratio of component (A): component (B) is 10: 0.01 to 10:10. A cosmetic comprising the composition according to claim 1. 17. The cosmetic according to claim 16, further comprising water. The cosmetic according to claim 17, further comprising a pH adjuster and / or a polyhydric alcohol. The cosmetic according to claim 17 or 18, which is a cleansing cosmetic. The cosmetic according to any one of claims 17 to 19, which does not contain a low-molecular sulfate. Use of the following combinations of components (A), (B) and (C) in cosmetics.
(A) at least one fatty acid-N-alkyl polyhydroxyalkylamide represented by the formula (I),
Wherein R ¹ is a linear or branched saturated or unsaturated alkyl group having 6 to 22 carbon atoms, and R ² is a hydrogen atom or an alkyl- or hydroxyalkyl group having 1 to 3 carbon atoms. And Z is a linear or branched polyhydroxyalkyl group having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer containing a structural unit derived from acrylamidoalkylsulfonic acid or a salt thereof,
(C) at least one compound selected from the group consisting of fatty acid esters and aliphatic ethers.