JP7176912B2 - Cosmetic composition and cosmetics using the same - Google Patents

Description

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

The general purpose of cosmetics is to protect the skin of the face, limbs, etc. in a healthy manner and to make them look beautiful. For this reason, cosmetics such as skin creams and lipsticks contain a variety of ingredients that meet their objectives, such as nutritional supplements for the skin, white pigments, chromatic pigments, and binder ingredients to hold them in place. and many of their ingredients are oil-soluble materials. These materials are usually dispersed or dissolved in a medium containing water as a main component, and are coated on the skin by human hands or the like.

Cosmetics applied to the skin are often cleaned daily with water or detergents. Cleansing the skin is very important, for example for facial care. This has to be as effective as possible because greasy residues such as excess sebum, residues of cosmetics used on a daily basis, and make-up products, especially waterproof products, can damage the skin. It accumulates in the folds of the skin and can clog the pores of the skin, resulting in the appearance of blemishes.

Typical properties required for cosmetic cleansing agents are as follows.
(1) Ability to remove and purify various substances such as cosmetic ingredients and sebum applied to the skin with a small amount of cleansing agent in a short period of time.
(2) The skin and eyeballs should not be irritated so that the skin does not become dry due to the removal of substances more than necessary from the skin.
(3) It must be soluble or dispersible in a water-based solvent having a cleansing effect.
(4) It must have an appropriate viscosity so that it does not drip because it is placed on the skin and handled with fingers.
(5) It should be comfortable to the touch and give a good feel after use.
(6) Ingredients for cosmetics are readily available, highly safe, and inexpensive.
(7) In order to clear safety problems such as irritation to the skin and biodegradability, the fatty acid portion in the surfactant is particularly preferably fatty acid obtained from oils derived from natural products. can be used as is without separating into

Conventionally, many improvements have been made to address many of the problems described above. For example, Patent Document 1 discloses a skin cleanser containing sodium laureth sulfate, N-alkylglucamide, and common salt in combination. By combining sodium laureth sulfate with salt, a high viscosity of 500 mPas can be obtained. Patent Document 2 describes the use of alkyl glucamides in skin creams and the like.

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

Patent Literature 3 discloses a cosmetic intended to eliminate the use of surfactants in order to solve the problem of lauric acid-based surfactants. By combining a polymer containing acrylamidoalkylsulfonic acid as a monomer unit with oils and fats, it is possible to obtain high-viscosity lotions and creams without using lauric surfactants. However, as shown in the examples below, this method does not provide a cleansing effect suitable for cleansing, even though a high viscosity is obtained.

As described above, although individual performances have been improved, the actual situation is that no means has been found that satisfies all of the above requirements (1) to (7).

Special table 2016-528188 publication Japanese Unexamined Patent Application Publication No. 2000-297028 Japanese Patent Laid-Open No. 2002-293717 Japanese Patent Application Laid-Open No. 2002-212025

The first object of the present invention is to prepare a cosmetic composition which has a moderately high viscosity and does not flow easily, is easy to handle with hands and fingers, is less irritating to the skin and eyes, and has an excellent cleansing effect. It is to provide a composition (cosmetics ingredient) that enables

A second object of the present invention is to provide a cosmetic ingredient which, in addition to the above properties, is highly environmentally friendly and enables the provision of inexpensive cosmetics.

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

Still other objects of the present invention will become clear from the description below.

In view of the above actual situation, the inventors of the present invention conducted earnest research 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-based sulfonate-based surfactant can obtain detergency and a thickening effect by using salt in combination, but all three requirements including low skin irritation are met. cannot be satisfied simultaneously. Therefore, it was judged difficult to use a low-molecular-weight sulfonate anionic surfactant and salt in combination to obtain a thickening effect.
(2) Therefore, in order to obtain a thickening effect, an anionic polymer having an acrylamidoalkylsulfonic acid structure shown in Reference 3 was tested. Dirt is difficult to remove.
(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. A phenomenon occurred in which the viscous effect was remarkably lowered.
(4) The reason why the viscosity of (3) is lowered is unknown. , it was speculated that the action may 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 the thickening inhibitory action of alkylamide, and tested various materials. As a result, it was found that the addition of fatty acid esters or aliphatic ethers having a specific structure recovered the viscosity that had been reduced by the addition of alkylamide, and at the same time, significantly improved the cleaning effect.
(6) The above results are due to the interaction between a polymer having an acrylamidoalkylsulfonic acid structure, an alkylamide, and fatty acid esters or aliphatic ethers, wherein the fatty acid esters and/or aliphatic ethers are acrylamide It was speculated that while maintaining the thickening structure of the alkylsulfonic acid-based polymer, its lipophilic properties play a role in promoting the cleaning of lipophilic stains.
(7) Based on the above findings, the inventors further searched for more preferable chemical structures and compositions for polymers having an acrylamidoalkylsulfonic acid structure, acrylamides, fatty acid esters, and aliphatic ethers, and arrived at the present invention.

According to the invention,
(1) It is easy to handle with the fingertips, does not easily drip off, easily removes strongly adhering stains such as lipstick, and provides a cleansing agent that lathers well and has an excellent feeling of use.
(2) Since no sulfonic acid-based surfactant is used, there is little irritation to the skin and eyes, and the product is highly safe even when used daily.
(3) The above measures can provide favorable properties not only for use as a cleansing agent, but also for other cosmetic compositions. An oil-soluble substance can be dissolved or dispersed in an aqueous solvent at a high concentration, and a highly viscous and safe cosmetic can be obtained.

The results of photographing the state of the sample on the skin to which the lipstick was applied are shown.

That is, the present invention provides a cosmetic composition comprising at least (A) alkylamides having a specific structure, (B) acrylamides having a specific structure, and (C) fatty acid esters and/or aliphatic ethers. It is a pharmaceutical composition. Due to the synergistic effect of these ingredients, it is possible to provide a cosmetic that is excellent in cleansing effect and safety while maintaining a high thickening effect.

Alkylamides as 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 carbon atoms, preferably 12 to 20 carbon atoms, especially 14 to 18 carbon atoms, and R ² is a hydrogen atom or a carbon atom; an alkyl or hydroxyalkyl group of 1 to 3, preferably 1 to 2, especially 1, and Z has 3 to 12 carbon atoms, preferably 5 to 10, especially 5 to 8, and 3 to 10 hydroxyl groups, Preferred are 3 to 8, especially 3 to 6, linear or branched polyhydroxyalkyl radicals. ] is a fatty acid-N-alkylpolyhydroxyalkylamide.

The term "cosmetic composition" as used in the present invention refers to an ingredient (cosmetic ingredient) used for the preparation of a cosmetic, particularly a cosmetic that comes into contact with the skin or hair. Components (A), (B) and (C), together or in different steps, which make up the composition in a customary compounding process for the end use, in combination with other necessary ingredients each customary for the specific end use It is introduced as appropriate and used as a cosmetic. As used herein, "cosmetics" (also referred to as cosmetics or cosmetic products) refer to finished cosmetic products that are ready for consumer use.

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

In the above formula (II), 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 carbon It is an alkyl- or hydroxyalkyl group having 1 to 3, preferably 1 to 2, especially 1, atoms, especially methyl.

The alkylamides of formula (I) or (II) above used as component (A) according to the invention are at least compounds having one or more C18 fatty acid residues R ¹ CO—, based on their total amount. It is preferably contained at a rate of 8% by weight.

As the fatty acid moiety (R ¹ CO—) of the component (A) of the present invention, those made from plant-derived fats and oils are particularly preferred. One of the reasons for this is that by using plant-derived oils and fats as raw materials, the alkylamide of the present invention can be produced at low cost because it is excellent in environmental friendliness such as biodegradability, and fatty acids obtained by saponifying vegetable oils are used. There are things that can be done. Such oils and fats 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 large amounts of oleic acid and linoleic acid, such as sunflower oil, safflower oil, and particularly these high oleic oils, are particularly preferred.

The amount of component (A) in the composition of the present invention varies somewhat depending on its purpose, but is generally from 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 10-40% by weight, particularly preferably 20-35% by weight. If it is lower than this range, the removability of lipophilic substances and detergency will be lowered, and if it is higher than these ranges, there is a possibility that stability such as precipitation and phase separation of component A may be lowered.

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, preferably a monomer unit of formula (III) can be a polymer comprising

(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, alkali metal or alkaline earth metal ion).
Component (B) is preferably a copolymer obtained by copolymerizing acrylamidoalkylsulfonate monomer units of formula (III) with other monomer units to control water solubility, viscosity and other properties. For example, copolymers of acrylamidoalkylsulfonate monomers and N-vinylpyrrolidone are known for their high water solubility and high thickening effect.

Many specific compounds of acrylamidoalkylsulfonates are disclosed in Patent Document 3, and polymers containing units derived from alkali metal salts or ammonium salts of acrylamidoalkylsulfonic acid described in Patent Document 3 is preferred, and copolymers of such units with N-vinylpyrrolidone are particularly preferred. Among them, in said formula (III), in particular polymers containing units in which R ⁵ is H, Y is C(CH ₃ ) ₂ CH ₂ and X is sodium are used as component (B) is preferred.

The amount of component (B) in the composition of the present invention varies somewhat depending on its purpose, but is generally from 0.3 to 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 may decrease, and sedimentation and phase separation of the cleansing agent components may easily occur.
A preferred weight ratio of component (A):component (B) is 10:0.01 to 10:10, more preferably 10:0.05 to 10:7, particularly preferably 10:0.5 to 10:3. is.

The fatty acid esters and aliphatic ethers, which are the component (C) of the present invention, are added for the purpose of improving both the thickening effect and the cleaning effect through interaction between the component (A) and the component (B). One of the roles of esters generally used in cleansing agents is to remove oily components. is greatly different from the prior art in that it assists the

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

Preferably, said fatty acid esters (also referred to as ester oils) are selected from the group of esters which do not contain unsaturated bonds and/or do not contain ether or and/or hydroxyl groups. Further advantageously, the ester oil as make-up removing oil is a saturated ester free of ether and/or hydroxyl groups, preferably neither of these.

Component (C) of the present invention can also be selected from aliphatic ethers. These refer to ether compounds obtained by condensation of alcohols, and among them, examples include ether compounds of glycols and compounds obtained by further esterifying hydroxyl groups of ether compounds of glycols with organic groups. 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 group having 1 to 4 carbon atoms, or an alkanoyl group, provided that either one of R ³ and R ⁴ is is an alkyl group and n is a number from 1-4.

The effect of removing oily substances and the effect of assisting the thickening effect of component (C) are caused by the action of the lipophilic portion and the hydrophobic portion in component (C). It is considered that a hydrophobic group acts. Therefore, the use of one or more esters and/or ethers selected from esters and ethers of suitable inorganic I/O value (also referred to as IOB value) is preferred. The I/O value is preferably 0.05 to 2.0, more preferably 0.07 to 1.0, particularly preferably 0.1 to 0.5.

Accordingly, fatty acid esters as component (C) in the composition of the present invention are particularly 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-ethylhexylhexanoate, ethyl laurate, methyl myristate, octyldodecyl octanoate, isodecyl neopentanoate, ethyl myristate , myristyl propionate, 2-ethylhexyl 2-ethylhexanoate, 2-ethylhexyl octanoate, 2-ethylhexyl caprate/caprylate, methyl palmitate, butyl myristate, isobutyl myristate, ethyl palmitate, isohexyl It can be selected from the group comprising laurate, hexyl laurate and isopropyl isostearate, and 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 varies somewhat depending on its purpose, but is generally 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 range, not only is the required ability to remove oily components not obtained, but also the thickening effect cannot be obtained. , the stability over time decreases.

As shown in Examples below, the cosmetic composition of the present invention comprises (A) an alkylamide having a specific structure, (B) an anionic polymer having an acrylamidoalkylsulfonic acid structure as a monomer unit, and (C) By providing fatty acid esters and / or aliphatic ethers, the thickening effect of component (B) suppresses the phenomenon that the thickening effect of component (B) is reduced by the addition of component (B), restores the thickening effect, and restores the thickening effect of component (A ) and component (B) alone can remove insufficient oily substances and remarkably enhance dissolving power.

An alkylamide compound (A) having a specific structure and an anionic polymer (B) containing an acrylamidoalkylsulfonic acid structure as a monomer unit are conventionally widely known materials because each of them independently has a high function. A cosmetic composition combining (A) and (B) has not been known in the past. The reason for this is that even if a combination of components (A) and (B) were conceived, not only would the expected thickening effect and cleansing effect not be obtained, but on the contrary, the viscosity would decrease. presumably not.

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

As mentioned above, the combination of component (A) and component (B) has not been known in the prior art, and therefore compositions combining components (A), (B), and (C) and their functions have not been known in the prior art. unknown. It is understood that the above fatty acid esters and aliphatic ethers (C) improve the solubility of oily substances from their properties, but the thickening effect of component (B) is lost by the addition of component (A). The detailed mechanism of the phenomenon of reviving is unknown. It is understood that the thickening effect of component (B) is that the interaction between the polymer in the aqueous medium and/or the interaction between the polymer and water increases the viscosity, although the interaction is ) (alkylamide) and the anionic polymer of component (B). As shown in the examples below, the thickening effect of component (B) alone decreases when component (A) or (C) is added alone, but component (A), (B), (C) ) restores the thickening effect of component (B). From such a phenomenon, it is presumed that fatty acid esters and aliphatic ethers reduce the interaction between components (B) and (A) and restore the original thickening effect of component (B). .

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

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

The additional surfactant (E) plays a role of assisting functions that are lacking in the above components (A) to (C), such as improving stability and improving foaming power. quaternary ammonium salt compounds such as betaine; In the case of cleansing agents using the compositions of the present invention, the amount of said surfactant (E) can generally be 20-80% by weight, based on the total weight of the cleansing agent.

When the present cosmetic composition is used as, for example, a cleansing agent, the cleansing agent is preferably weakly acidic, and the pH adjuster (F) for this purpose is, for example, organic acids such as acetic acid, citric acid, succinic acid, and tartaric acid; Inorganic acids such as acids can optionally additionally be added so that the pH is between 4 and 7, particularly preferably between 5 and 6.5.

In the case of cleansing agents using the composition of the present invention, the proportion of said pH adjusting agent can generally be 2.0 to 20% by weight, based on the total weight of the cleansing agent. If the pH value is too high, skin irritation may occur, while if the pH value is too low, skin irritation may occur and the stability of the composition may decrease. ) Dyes and pigments (both organic and inorganic) can be selected from the corresponding positive list in the Cosmetics Regulation or the EC List of Cosmetic Colorants. Also advantageously used are, for example, pearlescent pigments such as pearl essence (guanine/hypoxanthine mixed crystals from fish scales) and mother-of-pearl (powder bivalve shells), single crystal pearlescent pigments such as oxychloride Bismuth (BiOCl), layer/substrate pigments such as mica/metal oxides, silver white pearlescent pigments composed of TiO2, interference pigments (TiO2, different layer thicknesses), color luster 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 invention can generally be from 0.5 to 10% by weight, based on the total weight of the finished cleansing agent.

The fragrances (H) used can also be natural odorant mixtures such as those obtained from plant or animal sources, such as pine oil, citrus oil, jasmine oil, lily oil, rose oil or ylang-ylang oil. . Relatively low-volatility essential oils commonly used as aromatic ingredients, such as sage oil, chamomile oil, clove oil, melissa oil, mint oil, cinnamon leaf oil, linden flower oil, juniper berry oil, vetiver oil, and olibanum oil. , galbanum oil and labdanum oil are also suitable as perfume oils. The amount of present 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 those listed in the relevant annexes of the European Cosmetics Act, such as phenoxyethanol, benzyl alcohol, parabens, benzoic acid and sorbic acid. A particularly suitable example is 1,3-bis(hydroxymethyl)-5,5-dimethylimidazolidine-2,4-dione (Nipaguard® D M D M H). It can generally be from 0.1% to 2.0% by weight, based on the total weight of the finished cleansing agent composition.

As the stabilizer (J) preferable for the product using the present invention, various materials suitable for the purpose are used. It is also possible to add about % by weight.

The cosmetic composition of the present invention is prepared by mixing components (A), (B) and (C) 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. Moreover, conventionally used methods can be used for the production of cosmetics using the cosmetic composition of the present invention. For example, in the case of cleansing cosmetics, after dissolving a predetermined amount of an anionic polymer of component (B) in a predetermined amount of water, a predetermined amount of alkylamides of component (A) is added, and then component (C) is added. is added, followed by sufficient stirring and emulsification. Alternatively, predetermined amounts of components (B) and (C) may be dispersed in water, and then a predetermined amount of component (A) may be added and thoroughly stirred to emulsify. The cosmetic composition of the present invention can be used in cosmetics generally in a proportion of 2 to 30% by weight, preferably 3 to 20% by weight, depending on the application.

The above preferred embodiments have focused on cleansing agents. The cosmetic composition of the present invention can be used not only as a cleansing agent but also as a skin and hair cleansing agent such as lotion and shampoo, and also as a dishwashing agent.

The cosmetic composition of the present invention disperses or dissolves oily substances such as sebum, has low irritation to the skin, and has a large thickening effect. Applications that take advantage of such characteristics are not limited to the cleaning agents and detergents described above, and can be widely used in cosmetics for a wider range of applications. For example, it can be suitably used for applications such as skin care cream, sunscreen cream, and shaving soap.

Accordingly, a further subject of the present invention is
(A) at least one fatty acid-N-alkylpolyhydroxyalkylamide of formula (I),

[In the formula, 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 radical having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer comprising structural units 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;
Cosmetics, especially cleansing cosmetics, containing

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

[In the formula, 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 radical having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer comprising structural units 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;
in cosmetics, in particular in cleansing cosmetics.

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

The invention is illustrated in detail by the following examples.

Materials Used Table 1 shows the materials used in Examples and Comparative Examples.

The evaluation method is as follows.
1) Viscosity measurement:
Using a Brookfield viscometer model RV, the viscosity is measured after 5 minutes at 25° C. and 50 revolutions/minute.
2) Cleanliness:
A commercially available lipstick is applied to a 1.5 cm x 1.5 cm area of a person's 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 fingers as if massaging 30 times. After thoroughly rinsing with tap water, lightly wipe off moisture with a paper towel. Observe the cleaning condition visually.
3) Emulsion:
Apply to skin and observe visually.

Comparative example 1
Component (B) (Aristoflex® Silk) is added dropwise to water and stirred with a stirrer. After being thoroughly dispersed, a solvent (dipropylene glycol) is added and stirred, and the pH is adjusted with component (F) (citric acid).

Comparative example 2
Component (B) (Aristoflex® Silk) is added dropwise to water and stirred with a stirrer. After being thoroughly dispersed, component (A) (GlucoTain (registered trademark) sense) and solvent (dipropylene glycol) are added and stirred, and then pH is adjusted with component (F) (citric acid).

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

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

Table 2 shows the formulations of Comparative Examples 1 to 3 and Example 1 and the evaluation results thereof. Note that the evaluation results regarding performance are shown as 1, 2, 3, and 4 in descending order of performance.

Also, FIG. 1 shows the result of photographing the appearance 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 a 1.5 cm x 1.5 cm area of a person's forearm and left for 20 minutes.
Step 2: Shown is the state when 1.5 g of the formulations of Examples and Comparative Examples were applied to each area.
Step 3: Shows the state when gently rubbed with fingers as if massaging 30 times. It can be seen that the formulations of Examples have better compatibility with the applied lipstick than the formulations of Comparative Examples.
Step 4: After thoroughly rinsing with tap water, lightly wipe dry with a paper towel. The portion treated in Example 1 was able to remove the lipstick most cleanly.

From Table 2 and FIG. 1, the following can be said.
(1) Example 1 containing components (A), (B) and (C) exhibits the highest cleaning ability while maintaining a high thickening effect.
(2) The thickening effect of component (B) alone is large, but the cleaning effect is insufficient (Comparative Example 1). The cleaning ability is improved, but the viscosity drop is significant.
(3) The combination of component (B) and component (C) (Comparative Example 3) likewise improves the detergency, but greatly lowers the viscosity.
(4) The above phenomenon is understood to be because the intermolecular interaction that maintains the high viscosity of component (B) is reduced by the addition of component (A) or component (C).
(5) By adding both components (A) and (C) to component (B), the viscosity is greatly improved. It is presumed to be revived by the addition of C).
(6) Example 1 has a higher degree of emulsification than Comparative Example. The components (A), (B), and (C) interact to form a micelle structure, which improves the cleaning ability and increases the intermolecular interaction for maintaining high viscosity. seems to suggest that

Claims (20)

(A) at least one fatty acid-N-alkylpolyhydroxyalkylamide of formula (I);

[In the formula, 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 radical having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer comprising structural units 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 cleansing cosmetic composition comprising at least 2. The cosmetic composition according to claim 1, wherein the at least one fatty acid-N-alkylpolyhydroxyalkylamide (A) comprises fatty acid N-methylglucamides. As the at least one fatty acid-N-alkylpolyhydroxyalkylamide (A), R ¹ is a linear or branched, saturated or unsaturated alkyl group having 12 to 20 carbon atoms and R ² is methyl 3. The cosmetic composition according to claim 1, comprising fatty acid N-methylglucamides represented by the following formula (II):

The fatty acid moieties (R ¹ CO—) in the at least one fatty acid-N-alkylpolyhydroxyalkylamide (A) are two or more saturated or unsaturated alkyls 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 fatty acid moieties having groups. Cosmetics according to any one of claims 1 to 4, wherein the fatty acid moiety (R ¹ CO-) in the at least one fatty acid-N-alkylpolyhydroxyalkylamide (A) is derived from plants. Food composition. The fatty acid moiety (R ¹ CO—) in the at least one fatty acid-N-alkylpolyhydroxyalkylamide (A) is sunflower oil, high oleic sunflower oil, safflower oil, high oleic safflower oil, coconut oil. , soybean oil, and/or olive oil. The composition according to any one of claims 1 to 6, containing component (A) in an amount of 0.5 to 50% by weight based on the total weight of component (A), component (B) and component (C). A cosmetic composition as described. The cosmetic composition according to any one of claims 1 to 7, wherein the acrylamidoalkylsulfonic acid or its salt is acrylamidomethylpropanesulfonic acid (AMPS) salt. 9. The composition according to any one of claims 1 to 8, containing 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 I/O value (IOB value) of component (C) is 0.05 to 2.0. The cosmetic composition according to any one of claims 1 to 10, wherein the fatty acid ester as component (C) is an ester of a fatty acid having 10 or more carbon atoms. The fatty acid moiety in the above fatty acid ester as 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 cosmetic composition according to any one of claims 1 to 11, which is a mixture of The cosmetic composition according to any one of claims 1 to 12, wherein the fatty acid ester as component (C) is an ester with a monohydric alcohol having 1 to 8 carbon atoms. 14. Any one of claims 1 to 13, containing component (C) in an amount of 0.5 to 80% by weight based on the total weight of component (A), component (B) and component (C). The cosmetic composition according to . The cosmetic composition according to any one of claims 1 to 14, wherein the weight ratio of component (A):component (B) is from 10:0.01 to 10:10. A cleansing cosmetic containing the composition according to any one of claims 1 to 15. 17. Cosmetics according to claim 16, further comprising water. 18. Cosmetics according to claim 17, further comprising a pH adjuster and/or a polyhydric alcohol. 19. Cosmetics according to claim 17 or 18 , which do not contain low-molecular-weight sulfates. Use of a combination of the following components (A), (B) and (C) in cleansing cosmetics.
(A) at least one fatty acid-N-alkylpolyhydroxyalkylamide of formula (I);

[In the formula, 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 radical having 3 to 12 carbon atoms and 3 to 10 hydroxyl groups. ]
(B) at least one anionic polymer comprising structural units 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;

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