JP2010280597A - Skin-cleansing agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin-cleansing agent having good massaging properties and sustainability of the massaging properties, in combination with cleansing properties. <P>SOLUTION: The skin-cleansing agent includes (A) 0.2-1.8 mass% of a carboxyvinyl polymer or an alkyl-modified carboxyvinyl polymer and salts thereof, (B) 0.2-3 mass% of a water-soluble salt, (C) 3-20 mass% of an oil liquid at 25°C, (D) 1.5-15 mass% of a nonionic surfactant, (E) 38-70 mass% of a polyhydric alcohol and (F) 12-50 mass% of water. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a skin cleanser.

  Various cleansing cosmetics for removing sebum stains and makeup cosmetics have been developed. For example, oil-based cleansing cosmetics mainly composed of liquid oils, and emulsified cleansing cosmetics that are emulsified with a surfactant to obtain a cream or milky emulsion; surface-active with oily components and polyhydric alcohols Cleansing cosmetics having a liquid crystal layer using an agent; and further, aqueous cleansing cosmetics in which a surfactant and an aqueous component are solidified with a water-soluble polymer to form a gel have been developed.

  Gel-based water-based cleansing cosmetics have a smooth feel and low fluidity, so they are superior to conventional cleansing agents, have better massage properties and are easier to blend with makeup. Therefore, palatability is high (Patent Literature 1, Patent Literature 2, Patent Literature 3). However, these cleansing cosmetics are hard when applied to the skin, sometimes in a jelly form, and too heavy for massage. Further, in the process of massaging, the viscosity is remarkably reduced in a short time, and dripping is likely to occur, so that there is a problem that sufficient massage time cannot be obtained. Furthermore, since the continuous phase of the agent is aqueous, there has been a problem that it is difficult to sufficiently clean up makeup having excellent sweat resistance and sebum resistance in recent years.

  In addition, the emulsifying type cleansing cosmetic has a moisturizing feeling after use, but has a thick and slippery feeling at the start of massage, but the phase inversion during the massage However (for example, non-patent document 1), there is a feature that the feeling of massage becomes light. For this reason, there was a problem that it was not possible to massage thoroughly.

Japanese Patent Laid-Open No. 2001-19619 JP-A-9-87139 JP-A-8-283123

Munakata et al., “Development of Oil Cleansing Fees”, Fragrance Journal, 24 (7), p. 31-36 (1996)

  An object of the present invention is to provide a skin cleansing agent that achieves both good massage properties, sustained massage properties, and cleansing properties.

  By dissolving a specific water-soluble polymer in an aqueous solvent and combining a water-soluble salt and a liquid oil agent, the present inventors have a good massage property and a liquid property that maintains a massage property, and an excellent detergency. It has been found that a skin cleanser can be obtained.

The present invention includes the following components (A) to (F):
(A) carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer and salts thereof 0.2 to 1.8% by mass,
(B) 0.2-3 mass% of water-soluble salt,
(C) 3-20% by mass of liquid oil at 25 ° C.
(D) Nonionic surfactant 1.5-15 mass%,
(E) Polyhydric alcohol 38-70 mass%,
(F) Water 12-50% by mass
The skin cleansing agent containing is provided.

  The skin cleansing agent of the present invention has both good massage properties, durability of the massage properties, cleanability, a refreshing feeling after use and a moisturizing feeling.

Component (A) used in the present invention is selected from carboxyvinyl polymers, alkyl-modified carboxyvinyl polymers, and salts thereof.
Examples of the carboxyvinyl polymer include polymers containing acrylic acid or methacrylic acid as a constituent monomer, and specific examples include Carbopol 980 and Carbopol 981 (hereinafter, Lubrizol Advanced Materials).
The alkyl-modified carboxyvinyl polymer is a polymer containing, as a constituent monomer, acrylic acid or methacrylic acid ester obtained by ester bond (alkyl-modified) of acrylic acid or methacrylic acid and a fatty acid having 10 to 30 carbon atoms. And those known as alkyl acrylate methacrylate copolymers (acrylic acid / alkyl acrylate (C10-30)) copolymers. Specifically, Carbopol ETD2020, Carbopol 1382, Pemlen TR-1, Pemlen TR-2 (hereinafter, Lubrizol Advanced Materials) and the like can be used.
Examples of these salts include alkali metals such as sodium and potassium; ammonium; ammonium derived from alkanolamines such as monoethanolamine, diethanolamine and triethanolamine; salts based on basic amino acids such as arginine and lysine. It is done. These salts are obtained by neutralization of the polymer and the base.

Of these, alkyl-modified carboxyvinyl polymers and salts thereof are preferred, and salts with alkali metals such as sodium and potassium are preferred.
The carboxyvinyl polymer of component (A), the alkyl-modified carboxyvinyl polymer, and salts thereof are contained in an amount of 0.2 to 1.8% by mass in the total composition from the viewpoint of massage properties of the skin cleanser of the present invention. Preferably it is 0.3-1.4 mass%, More preferably, it contains 0.5-1.2%.

The component (B) used in the present invention is a water-soluble salt, which means 5 g or more that dissolves in 100 g of water at 20 ° C., and includes inorganic salts and organic salts.
Specific examples of water-soluble inorganic salts include alkali metal metal hydroxides and ammonium salts with hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, triphosphoric acid, pyrophosphoric acid, and carbonic acid. Examples thereof include chlorides such as potassium and magnesium chloride; sulfates such as sodium sulfate, potassium sulfate, magnesium sulfate and aluminum sulfate; carbonates such as sodium carbonate and sodium hydrogen carbonate. Examples of water-soluble organic salts include salts of acids such as lactic acid, succinic acid, citric acid, tartaric acid, malic acid, maleic acid and fumaric acid with alkali metals, ammonium, etc., monosodium citrate, citric acid Examples include disodium, trisodium citrate, potassium lactate, ammonium succinate, and potassium malate. Among these, from the viewpoint of stability, a salt of a polyvalent acid having a hydroxy group and an alkali metal is preferable, and a salt of citric acid, tartaric acid, malic acid and sodium or potassium is more preferable.
In addition, as the organic salt of component (B), one having a total carbon number of 6 or less is used, and it is preferable not to contain an amino acid or a compound constituting an inner salt.

  One or more water-soluble salts of component (B) can be used, and are contained in an amount of 0.2 to 3% by mass, preferably 0.3 to 1.2, from the viewpoint of controlling the liquidity of the skin cleanser. It is contained by mass%, more preferably 0.5-1 mass%.

  Component (C) is an oil agent that is liquid at 25 ° C. The liquid oil at 25 ° C. can be used without particular limitation as long as it is used in ordinary cosmetics. For example, vegetable oils such as jojoba oil; animal oils such as liquid lanolin; synthetic ester oils such as isononyl isononanoate, isotridecyl isononanoate, isopropyl myristate, isopropyl palmitate, ester oils such as polyhydric alcohol fatty acid esters; cetyl-1,3 -Ether oils such as dimethylbutyl ether, dicaprylyl ether, dicapryl ether; linear or branched hydrocarbon oils such as liquid paraffin, light isoparaffin, liquid isoparaffin, squalane, squalene; dimethylpolysiloxane, dimethylcyclopolysiloxane, methylphenylpoly Silicone oils such as siloxane, methyl hydrogen polysiloxane, higher alcohol-modified organopolysiloxane; fluoropolyether, perfluoroalkyl ether silicone, etc. Motoyu and the like.

Among these, a synthetic ester oil having a branched chain, an ether oil having a branched chain, a hydrocarbon oil having a branched chain, and a low viscosity silicone oil of 10 cs or less (25 ° C.) are preferable. A synthetic ester oil having a low viscosity silicone oil of 10 cs or less (25 ° C.) is preferable.
The component (C), which is a liquid oil at 25 ° C., is preferably used in combination of two or more kinds, and further, a polar oil selected from a synthetic ester oil having a branched chain and an ether oil having a branched chain; It is preferable to use a nonpolar oil selected from a hydrocarbon oil having a chain and a low-viscosity silicone oil having a viscosity of 10 cs or less (25 ° C.) from the viewpoint of improving detergency. In particular, it is preferable to combine a synthetic ester oil having a branched chain and a low-viscosity silicone oil of 10 cs or less (25 ° C.), and it is more preferable that they are compatible with each other. This also contributes to the transparency of the cosmetic described later.

  Component (C) is contained in the total composition in an amount of 3 to 20% by mass, preferably 5 to 18% by mass, more preferably 8 to 16% by mass, from the viewpoint of detergency and a refreshing feeling when washed away. The

  The component (D) used in the present invention is a nonionic surfactant and is not particularly limited as long as it is used in ordinary cosmetics. For example, glycerin fatty acid ester and its alkylene glycol adduct, polyglycerin fatty acid ester and its alkylene glycol adduct, propylene glycol fatty acid ester and its alkylene glycol adduct, sorbitan fatty acid ester and its alkylene glycol adduct, sorbitol fatty acid ester and its Alkylene glycol adduct, polyalkylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyalkylene alkyl ether, glycerin alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene hydrogenated castor oil, alkylene glycol adduct of lanolin, higher fatty acid ethanolamide , Polyoxyalkylene alkyl co-modified silicone, polyether-modified silicone Alkyl glucoside, and the like.

The nonionic surfactant of component (D) can be used by mixing one or a plurality of surfactants, and from the point of refreshing feeling when makeup is removed and washed away, HLB 11-20 Are preferred. Furthermore, it is preferable that HLB is 11-14.
Here, HLB (hydrophilic-lipophilic balance <Hydrophilic-Lypophilic Balance>) indicates the molecular weight of the hydrophilic group in the total molecular weight of the surfactant, and is determined by the Griffin equation. It is.
In the case of one kind of nonionic surfactant, the HLB of the nonionic surfactant is 11 or more. When two or more kinds of nonionic surfactants are used in combination, the mixed HLB is 11 The above is preferable. The mixed HLB can be obtained by phase-averaging the HLB value of each nonionic surfactant based on the blending ratio, as in the following equation.

Mixed HLB = Σ (HLBx × Wx) / ΣWx
HLBx indicates the HLB value of the nonionic surfactant X.
Wx represents the mass (g) of the nonionic surfactant X having a value of HLBx.

  The nonionic surfactant of component (D) is preferably used in combination of two or more from the viewpoint of stability, and (d1) a surfactant of HLB11 or higher and (d2) a surfactant of HLB9 or lower is combined. Are preferably used. (D1) A surfactant of HLB11 or higher can improve high-temperature stability, and (d2) a surfactant of HLB9 or lower can improve stability at low temperatures.

  The nonionic surfactant of component (D) is contained in the total composition in an amount of 1.5 to 15% by mass, preferably 3 to 13% by mass, from the viewpoint of a refreshing feeling when washed away, a feeling of massage, and makeup removal. More preferably, the content is 3.5 to 7% by mass.

  Examples of the polyhydric alcohol of component (E) used in the present invention include polyhydric alcohols, monosaccharides and monosaccharide derivatives, dimonosaccharides and dimonosaccharide derivatives, and polyoxyalkylene alkyl glucosides. More specifically, examples of the polyhydric alcohol include ethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, 1,3-butylene glycol, diethylene glycol, dipropylene glycol, glycerin, pentaerythritol, polyglycerin and the like; Examples of monosaccharides and monosaccharide derivatives, dimonosaccharides and dimonosaccharide derivatives include glucose, maltose, xylitol, lactitol, palatinit, sorbitol, maltitol, hydroxypropyl sorbitol, fructose, erythritol and the like; polyoxyalkylene alkyl glucoside Examples thereof include polyoxyethylene methyl glucoside and polyoxypropylene methyl glucoside.

  Among these, ethylene glycol, propylene glycol, isoprene glycol, dipropylene glycol, glycerin, 1,3-butylene glycol, sorbitol, and polyoxyethylene methyl glucoside are preferable.

  In particular, it is preferable to include both sorbitol and / or glycerin and polyoxyethylene methyl glucoside from the viewpoint of imparting a feeling of thickness of the agent at the time of massage. Is preferably 5: 1 to 2: 1, particularly 3: 1 to 2: 1.

  One or more types of component (E) can be used, and it is particularly preferable to use a combination of two or more types from the viewpoint of enhancing the moisturizing feeling. Component (E) is contained in the total composition in an amount of 38 to 70% by mass, preferably 44 to 66% by mass, and more preferably 49 to 61% by mass.

  The water of component (F) used in the present invention functions as a solvent for components (A) to (D), and is contained in an amount of 12 to 50% by mass, preferably 15 to 35% by mass in the total composition.

In the skin cleansing agent of the present invention, component (A) carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer and salts thereof are dissolved in water of component (F) to form a gel. However, since it becomes a hard jelly-like shape (feels soft and soft), it is hard when placed on the skin, causing a sudden drop in viscosity in the course of use, and sufficient massage persistence cannot be obtained. Therefore, it has been found that by adding a water-soluble salt of the component (B) and further containing a large amount of the polyhydric alcohol of the component (E), the liquid property has an unprecedented adhesion, spread and strain. Furthermore, by adding a liquid oil agent at 25 ° C. of the component (C), it is possible to maintain a liquid property with a slight feeling. As a result, it is possible to find a new liquid property that can be obtained with a smooth and highly massageable liquid property that cannot be achieved with conventional gel-like skin cleansing agents, and that a highly massageable liquid property lasts. It was.
The skin cleanser of the present invention is pre-prepared and has a smooth texture, has a good spread when applied, has a feeling of sticking to the skin, and persists even when this feel is massaged It is.

  More specifically, the mass ratio of the polymer part of component (A) to the mass ratio of component (B) is excellent in spreading at the time of application, and (A) / (B) = 0 from the viewpoint of not forming a hard jelly. .4 to 2.5, more preferably 0.5 to 1.4, and particularly preferably 0.6 to 1.1.

  Moreover, the mass ratio of the polymer part of component (A) and the mass ratio of component (C) is (A) / (C) = 0 from the viewpoints of spreading at the time of application, dispersion stability of oil agent, and sustainability of massage. 0.02 to 0.25, more preferably 0.05 to 0.12, and particularly preferably 0.03 to 0.09.

  Further, from the viewpoint of obtaining dispersion stability of component (C), a refreshing rinsing feeling after use, and excellent makeup removal, the mass ratio of component (C) to component (D) is (C) / (D) = It is preferably 0.8 to 6, more preferably 1 to 5.5, and particularly preferably 2.5 to 3.5.

The skin cleanser of the present invention preferably has a transparent appearance. By making it transparent, you can feel the makeup stains removed by massage. In the skin cleanser of the present invention, as described above, it is preferable to use a combination of polar oil and nonpolar oil as the liquid agent at 25 ° C. of component (C), and in particular, synthetic ester oil having a branched chain. And a low-viscosity silicone oil of 10 cs or less (25 ° C.) can be combined, and can be made transparent.
In general, it is difficult to make the appearance transparent in a composition containing an oil, but in the present invention, it can be made transparent by combining such components.
Here, the term “transparent” means that when the turbidity is measured using an attached vial in a turbidimeter (TN-100 manufactured by Eutech Instrument), the measured value is 800 NTU or less, and further 600 NTU or less.

  In addition to the above components, the skin cleanser of the present invention further includes components used in ordinary cleansing agents, such as surfactants, moisturizers, oily components, bactericides, anti-inflammatory agents, antiseptics, chelates other than those described above Agents, thickeners, salts, pearling agents, scrub agents, fragrances, cooling agents, pigments, UV absorbers, antioxidants, plant extracts and the like.

  In the skin cleanser of the present invention, for example, the polymer of component (A) is dispersed in component (C) using a disper. A dispersion of the component (C) and the component (A) is added to the mixed liquid of the component (E) and the component (F) and mixed uniformly, and a base is added to neutralize the polymer of the component (A). Then, it can manufacture by adding a component (B) and a component (D) and mixing uniformly.

  The skin cleansing agent of the present invention can be applied, for example, as a facial cleanser, cleansing agent, body soap, hand soap, massage agent, etc., and is particularly suitable as a cleansing agent.

Examples 1-13, Comparative Examples 1-3
Manufactures a skin cleanser with the composition shown in Table 1 and provides finger fingering, spreading at the time of application, feeling of massage, sustainability of the massage, refreshing feeling at the time of rinsing, moisturizing feeling after wiping with a towel, makeup removal and transparency evaluated. The results are also shown in Table 1.

(Production method)
Examples 1-14, Comparative Examples 1-2
The polymer of component (A) is dispersed in component (C) using a disper to obtain a dispersion. The dispersion is mixed with the mixture of component (E) and component (F) to make it uniform. Thereafter, a base is added, and the mixture is sufficiently stirred to neutralize the component (A). Thereafter, component (B) and component (D) were added and mixed uniformly to obtain the intended skin cleanser.

Comparative Example 3
Components (D) and (C) excluding polyethylene glycol monostearate and cetanol are mixed and dissolved at 75 ° C. to obtain an oily component. On the other hand, the component (F) is heated to 75 ° C., and polyethylene glycol monostearate monostearate, sodium lauryl sulfate and the component (E) are added and dissolved to obtain an aqueous component. The aqueous component is added to the oily component with stirring and mixed uniformly. Then, the skin cleansing agent of Comparative Example 3 was obtained by gradually lowering the temperature to room temperature while stirring.

(Evaluation methods)
(1) Which finger of the agent:
A finger panel when 2 g of each skin cleansing agent was taken with a finger was evaluated according to the following criteria by a specialized panelist.
4; pre-prepared, but feeling loose.
3; Pre-prepared and smooth.
2; Feels like a cream.
1; Liquid (smooth) feeling.

(2) Spreading at the time of application, feeling of massage, persistence of the massage, refreshing feeling at the time of rinsing and moisturizing feeling after wiping with a towel:
Apply 3g of each skin cleanser to the forearm by a professional panelist, massage for 1 minute, and then rinse the cleanser on the forearm with running water while wiping it with the other palm, and then wipe the forearm with a towel. It was. At this time, the spread at the time of application, the feeling of massage, the sustainability of the massage, the refreshing feeling at the time of rinsing and the moisturizing feeling after wiping with a towel were evaluated according to the following criteria.

(2-1) Spread during application:
A: Extends very smoothly.
○;
Δ: The smoothness is slightly inferior.
×: The spread is bad.

(2-2) Massage feeling:
A: Adhesion and a feeling of scratching are very high.
○: Adhesiveness and scratching feeling.
Δ: Slightly inferior to adhesion and scratchiness.
X: There is no adhesion and a feeling of scratching.

(2-3) Massage persistence:
A: Adherence to the skin is very high, and the sustaining feeling of the liquid is very high.
○: Adherent to the skin and has a lasting feel of liquid.
Δ: Adherence to the skin is slightly inferior in the persistence of the feeling that the liquid is scratched.
×: Adhering to the skin, there is no persistence of the feeling that the liquid is scratched.

(2-4) Refreshing feeling when rinsing:
◎;
○: Refreshing.
Δ: Refreshing feeling is slightly inferior.
×: There is no refreshing feeling (smooth when rinsing).

(2-5) Moisturizing feeling after wiping with a towel:
A: There is a very moisturizing feeling.
○: There is a moisturizing feeling.
Δ: Slightly inferior moisturizing feeling.
×;

(3) Makeup removal (mascara):
Apply mascara (Maybelin, Volume Express Hyper Curl) thinly about 1cm in diameter on artificial leather, let it dry for more than 3 hours, put about 50mg of each cleaning agent, and massage lightly with your fingers 100 times did. Thereafter, it was washed away with running water, and the remaining mascara was visually observed and judged according to the following criteria.
◎; Mascara drop is very good.
○: Good mascara drop.
Δ: Mascara drop is slightly inferior.
X: The mascara is poorly removed.

(4) Makeup removal (foundation):
Apply a liquid foundation (established by Kao Corporation, Est Cream Makeup Lift Impression) on artificial leather, thinly about 1cm in diameter, let it dry for more than 3 hours, put about 50mg of each cleaning agent, and lightly with your finger 50 Massaged twice. Then, it rinsed with running water, the remaining condition of the foundation was observed visually, and the following references | standards determined.
A: The foundation is very well removed.
○: The foundation is well removed.
Δ: The fall of the foundation is slightly inferior.
X: The foundation has been dropped.

(5) Transparency:
The turbidity of each skin cleanser was measured with a turbidimeter (TN-100 manufactured by Eutech Instrument) using the attached vial.
○: The measured value is less than 600 NTU.
Δ: The measured value is 600 or more and less than 800 NTU.
X: The measured value is 800 NTU or more.

Example 14
Skin cleansing agents having the following compositions were produced in the same manner as in Examples 1-13.
The obtained skin cleanser is smooth and smooth with any finger, and it is excellent in spreading, massage feeling, persistence of massage, refreshing feeling when rinsing, moisturizing feeling after wiping with a towel, and makeup removal. It was transparent.

(component)
(1) Acrylic acid / alkyl methacrylate copolymer (Carbopol ETD2020, Lubrizol Advanced Materials) 0.70 (mass%)
(2) Potassium hydroxide 0.17
(3) Sodium citrate 0.70
(4) Methylpolysiloxane (Silicone KF-96L-5CS, Shin-Etsu Chemical Co., Ltd.) 2.90
(5) Cetyl-1,3-dimethylbutyl ether (ASE-166K, Kao Corporation) 4.60
(6) Isotridecyl isononanoate (Saracos 99, Nisshin Oilio Co., Ltd.) 4.50
(7) Polyethylene glycol monolaurate (Emanon 1112, Kao) 2.40
(8) Alkyl (C8-16) glucoside (AG-10LK, Kao Corporation) 0.34
(9) Polyglyceryl monoisostearate (Cosmol 41V, Nisshin Oilio Co., Ltd.) 0.73
(10) Dimethylsiloxane methyl (undecyl glyceryl ether)
Siloxane copolymer (SI-UGE, Kao Corporation) 0.30
(11) Glycerin 40.00
(12) Polyoxyethylene methyl glucoside (Macbiobride MG-20E (MS), NOF Corporation) 15.00
(13) Water 24.08
(14) Trimethylglycine 3.50
(15) Citric acid 0.08
Total 100.00

Claims (6)

The following components (A) to (F):
(A) carboxyvinyl polymer or alkyl-modified carboxyvinyl polymer and salts thereof 0.2 to 1.8% by mass,
(B) 0.2-3 mass% of water-soluble salt,
(C) 3-20% by mass of liquid oil at 25 ° C.
(D) Nonionic surfactant 1.5-15 mass%,
(E) Polyhydric alcohol 38-70 mass%,
(F) Water 12-50% by mass
Contains a skin cleanser.   When component (D) is one kind of nonionic surfactant, the HLB of the nonionic surfactant is 11 or more, and when a plurality of nonionic surfactants are used in combination, the mixed HLB is 11 The skin cleanser according to claim 1, which is as described above.   The skin cleansing agent according to claim 1 or 2, wherein the mass of the polymer part of component (A) and the mass ratio of component (B) are (A) / (B) = 0.4 to 2.5.   The skin washing | cleaning of any one of Claims 1-3 whose mass ratio of the polymer part of a component (A) and the mass ratio of a component (C) is (A) / (C) = 0.02-0.25. Agent.   The skin cleansing agent according to any one of claims 1 to 4, wherein a mass ratio of the components (C) and (D) is (C) / (D) = 0.8 to 6.   The skin cleansing agent according to any one of claims 1 to 5, wherein the appearance is transparent.