JP2008081495A - Gel cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic stably containing disintegrative particles and excellent in use feeling. <P>SOLUTION: The gel cosmetic comprises (A) a disintegrative particle wherein water-insoluble primary particles are bonded together by a water-soluble binder, (B) 15-70 mass% polyhydric alcohol, (C) a thickening polymer compound having carboxy, (D) <1 mass% water-soluble salt and (E) water, and has a pH of 4-9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a gel cosmetic that stably contains disintegrating particles and has excellent usability.

  A cleaning composition containing particles (scrubbing agent) is useful for removing old keratin and removing dirt that has entered pores. A comfortable massage feeling can also be obtained by appropriate physical stimulation of the particles.

  Such a cleaning composition is a disintegrating particle formed by agglomeration of at least a part of water-insoluble primary particles, which disintegrates in a water-soluble salt-containing aqueous solution due to a decrease in the concentration of the water-soluble salt. The thing containing particle | grains and water-soluble salt is known (patent document 1). However, since this detergent composition contains water-soluble salts so that the disintegrating particles do not disintegrate in the composition, it has been difficult to thicken the system using a polymer thickener.

  On the other hand, polyhydric alcohol is generally used in cosmetics as a humectant. In addition, in order to improve the permeability of active ingredients (Patent Document 2) and to keep the coating film after massage long and stable (Patent Document 3), it is aimed at special effects. It may be blended into

However, when polyhydric alcohol is blended in a large amount in cosmetics, the feel at the time of application may become heavy, massage properties may deteriorate, and stringiness may occur, making it difficult to handle. Furthermore, since it becomes sticky after rinsing, the blending amount is usually about several mass% to 10 mass%.
JP 2000-63899 A JP 2004-339110 A JP 2006-137731 A

  An object of the present invention is to provide a cosmetic material that stably contains disintegrating particles and has excellent usability.

  When the polyhydric alcohol is used in a large amount, the present inventors improve the solution properties such as spinnability and easily increase the viscosity by using a thickening polymer compound having a disintegrating particle stably and having a carboxyl group. It has been found that a gel-like cosmetic material that is excellent in usability can be obtained.

The present invention includes the following components (A), (B), (C), (D) and (E):
(A) Disintegrating particles formed by binding water-insoluble primary particles with a water-soluble binder,
(B) 15 to 70% by mass of a polyhydric alcohol,
(C) a thickening polymer compound having a carboxyl group,
(D) Water-soluble salt, less than 1% by mass,
(E) It provides water-containing gel cosmetics having a pH of 4-9.

  The cosmetics of the present invention are thickened by improving the solution properties such as spinnability by the thickening polymer compound having a carboxyl group, and the disintegrating particles are stably contained without disintegrating, and the feeling of use is also improved. It is excellent. In addition, the disintegrating particles disintegrate in the washing process and the rinsing process, resulting in less skin damage and itching, and the disintegrating particles are easily disintegrated by rinsing water and tears. .

  The disintegrating particles of the component (A) used in the present invention may be only water-insoluble primary particles or water-insoluble primary particles and water-soluble primary particles aggregated, and only water-insoluble primary particles or water-insoluble primary particles. And water-soluble primary particles are preferably aggregated with a water-soluble binder. These primary particles may be organic particles or inorganic particles. Here, “water-insoluble” means that when 1 part by mass of the target particles is dissolved in 99 parts by mass of water at 25 ° C., the solubility is less than 50% by mass, and “water-soluble” means that the solubility under the same conditions is 50 It means that it is at least mass%. The solubility is calculated from the solid content in the filtrate by filtering the aqueous solution with a filter paper (No. 2). The water-soluble primary particles preferably have a solubility of 90% by mass or more.

  Water-insoluble organic primary particles include polyethylene, polypropylene, polyamide, polyethylene terephthalate, polystyrene, polyurethane and their crosslinked products, sodium poly (meth) acrylate, poly (meth) acrylate esters and their crosslinked products, and ethylene. Synthetic polymers such as rubber, propylene rubber, styrene-butadiene rubber, butadiene rubber, silicone rubber, etc. and their cross-linked products; natural products such as cellulose and its derivatives, chitosan and its derivatives, corn starch, starch, fruit shell Examples thereof include polymers and derivatives thereof. Among these, polyethylene, polyamide, polystyrene, sodium poly (meth) acrylate, poly (meth) acrylate, cellulose and derivatives thereof, corn starch, starch, and the like are preferable, and corn starch, cellulose, and derivatives thereof are particularly preferably used. Here, “poly (meth) acrylic acid” means both “polyacrylic acid” and “polymethacrylic acid”.

  Examples of the water-insoluble inorganic primary particles include bentonite, talc, mica, kaolin, sepiolite, silica, calcium carbonate, titanium oxide, anhydrous silicic acid, hydroxy / calcium / apatite, and pearl. Among these, bentonite, talc, mica, kaolin, silica and the like are preferably used.

  The shape of these water-insoluble primary particles is not particularly limited, and may be a spherical shape, a substantially spherical shape, or an irregular shape by pulverization or the like, and hollow or porous particles can also be used. These water-insoluble primary particles may be used alone or in combination of two or more.

  Water-soluble organic primary particles include polyvinyl alcohol and derivatives thereof, poly (meth) acrylic acid alkali salt, (meth) acrylic acid / (meth) acrylic ester copolymer alkali salt, acrylic acid / maleic acid copolymer Synthetic polymers such as alkali salts of polyvinyl pyrrolidone, methylcellulose, ethylcellulose, sodium carboxymethylcellulose, hydroxyalkylcellulose, modified starch (hydroxyalkyl-modified starch, phosphate ester-modified starch, etc.), sugars such as sucrose and lactose; seaweeds, Examples include natural polymers such as proteins.

  Examples of the water-soluble inorganic primary particles include chlorides such as sodium chloride, potassium chloride, and magnesium chloride; sulfates such as sodium sulfate, potassium sulfate, magnesium sulfate, and aluminum sulfate; carbonates such as sodium carbonate and sodium bicarbonate. Can be mentioned. In the case of sodium chloride, commercially available salt, highly purified salt, natural salt, etc. can be used. Of these, inorganic particles such as sodium chloride, potassium chloride, magnesium chloride, and sodium carbonate are preferred.

  These water-soluble primary particles are not limited in shape, and may be used alone or in combination of two or more.

  In the disintegrating particles, the mass ratio of the water-insoluble primary particles to the water-soluble primary particles is preferably in the range of (water-insoluble primary particles) / (water-soluble primary particles) = 1/99 to 100/0.

  The average particle size of these primary particles is preferably 1 to 70 μm, and particularly preferably 5 to 70 μm from the viewpoint of easy granulation. When the average particle diameter of the primary particles is within this range, it is preferable from the viewpoint of discomfort of the primary particles and washability when the disintegrating particles disintegrate due to the washing process of the object to be cleaned and rinse water or tears.

  The average particle size of the disintegrating particles is preferably 70 to 800 μm, more preferably 70 to 600 μm, and particularly preferably 70 to 360 μm. When the average particle size of the disintegrating particles is in the range of 70 to 800 μm, the feeling of strangeness and skin irritation during use are particularly low and preferable.

  The disintegrating particles are preferably those in which the primary particles are aggregated with a water-soluble binder. Such a water-soluble binder is preferably one that dissolves in a polyhydric alcohol aqueous solution when the polyhydric alcohol concentration decreases and precipitates when the polyhydric alcohol concentration increases. For example, polyvinyl alcohol and its derivatives (itaconic acid-modified polyvinyl alcohol) Sulfonic acid-modified polyvinyl alcohol, maleic acid-modified polyvinyl alcohol, etc.), poly (meth) acrylic acid alkali salt, alkali salt of (meth) acrylic acid / (meth) acrylic acid ester copolymer, acrylic acid / maleic acid copolymer Synthetic polymers such as alkali salts of materials, polyvinylpyrrolidone, etc .; semisynthetic polymers such as methylcellulose, ethylcellulose, sodium carboxymethylcellulose, hydroxyalkylcellulose, starch derivatives; starch, seaweeds, plant mucilage, proteins, etc. Natural and polymer is. Of these, polyvinyl alcohol and derivatives thereof, sodium carboxymethylcellulose, and hydroxyalkyl cellulose are preferable, polyvinyl alcohol and derivatives thereof, and sodium carboxymethylcellulose are more preferable, and polyvinyl alcohol and derivatives thereof are particularly preferable.

  In the disintegrating particles, the water-soluble primary particles and the water-soluble binder may use the same type of material or different materials.

  The water-soluble binder is preferably used in an amount of 0.5 to 30% by mass with respect to the mass of the primary particles from the viewpoint of the disintegrating property of the particles and the workability during the production of the disintegrating particles or cosmetics containing the same.

  The method for producing the disintegrating particles is not particularly limited. For example, while mixing and / or mixing primary particles and a water-soluble binder, rolling granulation, rolling fluid granulation, fluidized bed granulation, stirring rolling It can be produced by a granulation method such as granulation, melt granulation, extrusion granulation, spray drying granulation or the like; a coating method such as spray drying, or a combination thereof.

  The collapsible particles have a characteristic that the disintegration rate increases in a high concentration polyhydric alcohol-containing aqueous solution due to a decrease in the polyhydric alcohol concentration. Therefore, when the disintegrating particles are blended in a cosmetic, the disintegrating particles are stably dispersed in the cosmetic without being disintegrated, and the disintegrating properties are decreased with a decrease in the concentration of polyhydric alcohol in the washing process and the rinsing process. The particles collapse. In consideration of such incorporation into cosmetics, the disintegrating properties of the disintegrating particles are designed so that at least a part of the disintegrating property is disintegrated in an aqueous solution having a polyhydric alcohol concentration of less than 15% by mass, particularly 10% by mass or less. From the viewpoint of rinsing with rinsing water or tears, it is more preferably designed so that 60% by volume or more disintegrates in an aqueous solution having a polyhydric alcohol concentration of less than 15% by weight, particularly 10% by weight or less. preferable. Moreover, it is preferable that the particle | grains collapsed at this time become an average particle diameter of 80 micrometers or less.

  One or more types of disintegrating particles of the component (A) can be used, and the content of 1 to 25% by mass, particularly 2 to 20% by mass in the total composition is preferable because of excellent detergency and feel.

Examples of the component (B) polyhydric alcohol used in the present invention include glycols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-butylene glycol, and 1,4-butylene glycol. Glycerins such as glycerin and diglycerin; sugar alcohols such as sorbitol, mannitol, xylitol and maltitol.
Of these, sorbitol, mannitol, xylitol, maltitol, and glycerin are particularly preferable.

  The polyhydric alcohol of component (B) can use 1 or more types, 15-70 mass% in the whole composition, Preferably 15-60 mass%, Furthermore, 20-50 mass%, Especially preferably, 31-70 mass%. 50% by mass is contained. If it is less than 15 mass%, the disintegrating particles of the component (A) cannot be stably contained in the cosmetic without collapsing.

  The viscosity-increasing polymer compound having a carboxyl group of component (C) used in the present invention is preferably a compound having a carboxyl group in the molecule and having a crosslinked structure. For example, polyacrylic acid as the main chain, Carboxyvinyl polymer containing allyl sucrose structure, pentaerythritol structure, etc. (commercially available products are carbopol 980, 981 (above, manufactured by Noveon)), acrylic acid / alkyl methacrylate (C10-30) copolymer (commercial product Examples include Pemulene TR1, TR2, Carbopol 1342, ETD2020 (manufactured by Noveon).

  One or more thickening polymer compounds of component (C) can be used, and 0.005 to 5% by mass, particularly 0.1 to 2% by mass in the total composition is not slippery, A refreshing feeling of use, an appropriate thickening effect, and physical properties such as an improvement in spinnability can be achieved, which is preferable.

  Examples of the water-soluble salt of component (D) that can be used in the present invention include water-soluble inorganic salts and organic salts having a water-soluble total carbon number of 8 or less.

  Examples of the water-soluble inorganic salt include chlorides such as sodium chloride, potassium chloride and magnesium chloride; sulfates such as sodium sulfate, potassium sulfate, magnesium sulfate and aluminum sulfate; carbonates such as sodium carbonate and sodium hydrogen carbonate. It is done. In the case of sodium chloride, commercially available salt, highly purified salt, natural salt, etc. can be used. Of these, sodium chloride, potassium chloride, magnesium chloride, and sodium carbonate are particularly preferably used.

Examples of the water-soluble organic salt include compounds having a total carbon number of 8 or less, and for example, citrate, succinate, maleate, fumarate, malate and the like are used.
These water-soluble inorganic salts and water-soluble organic salts can also be used in combination.

  The water-soluble salt of component (D) is contained in the whole composition in an amount of less than 1% by mass, preferably less than 0.9% by mass, and preferably contains no water-soluble salt. If it is 1% by mass or more, even if a thickening polymer compound is used, the viscosity cannot be sufficiently increased, and it becomes difficult to improve the spinnability and the like.

  In this invention, it is preferable to contain 25-80 mass% of water of a component (E) in the whole composition, especially 35-70 mass%.

The cosmetic of the present invention can further contain an anionic surfactant.
Examples of such an anionic surfactant include potassium lauryl phosphate, sodium lauryl phosphate, arginine lauryl phosphate, potassium myristyl phosphate, sodium myristyl phosphate, arginine myristyl phosphate, potassium palmityl phosphate, sodium palmityl phosphate, palmityl phosphate Alkyl phosphate salts such as arginine; POE alkyl phosphate salts such as polyoxyethylene (hereinafter referred to as POE) oleyl ether sodium phosphate and POE stearyl ether sodium phosphate; alkyl sulfates such as sodium lauryl sulfate and potassium lauryl sulfate Ester salt; POE alkyl ether sulfate such as POE potassium lauryl sulfate, POE sodium lauryl sulfate, POE lauryl sulfate triethanolamine, etc. Sodium lauroyl sarcosine, monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, monosodium N-myristoyl-L-glutamate, N-lauroylglycine triethanolamine, N-lauroyl-β-alanine triethanolamine, N- Acylated amino acid salts such as stearoyl-β-alanine triethanolamine; higher fatty acid amide sulfonates such as sodium N-myristoyl-N-methyltaurine; sulfosuccinates such as sodium di-2-ethylhexyl sulfosuccinate; ) Amide amino acid type surfactants such as disodium amphodiacetate and disodium cocoamphodipropionate. Among these, alkyl phosphate ester salts and POE alkyl ether sulfate ester salts are preferable.

  One or more anionic surfactants can be used, and the content of 1 to 50% by mass, particularly 5 to 40% by mass in the total composition is preferable because of good cleaning performance and foamability. The cosmetic of the present invention can be applied as a cleaning composition by containing such an anionic surfactant.

In addition, the cosmetic of the present invention can contain a nonionic surfactant.
Examples of such nonionic surfactants include POE fatty acid ester, POE alkyl ether, fatty acid POE alkyl ether, POE sorbitan fatty acid ester, POE sorbit fatty acid ester, POE glycerin fatty acid ester, POE hydrogenated castor oil, polyoxyethylene-polyoxy Examples include propylene alkyl ether, polyglycerin fatty acid ester, fatty acid sucrose ester, alkyl polyglucoside, and sorbite fatty acid ester. Among these, POE alkyl ether, POE hydrogenated castor oil, fatty acid sucrose ester, and alkyl polyglucoside are preferable.

  One or more kinds of nonionic surfactants can be used, and it is preferable to contain 1 to 30% by mass, particularly 2 to 20% by mass in the total composition because of good washing properties and detergency. The cosmetic of the present invention can be applied as a cleaning composition or a massage cosmetic by containing such a nonionic surfactant.

  In the present invention, the total content of the anionic surfactant and / or the nonionic surfactant and the content of the thickening polymer compound having a carboxyl group of the component (C) are calculated as component (C) / (component (C ) + (Anionic surfactant and / or nonionic surfactant) is preferably 0.02 or more, more preferably 0.1 or more from the viewpoint of improving the spinnability. .2 or less is preferable from the viewpoint of usability such as melting and collapsing property of the agent.

  In addition to the above components, the cosmetics of the present invention include components used in normal cosmetics, such as humectants other than polyhydric alcohols, oily components, whitening agents, blood circulation promoters, anti-inflammatory agents, and bactericides. UV absorbers, feel improvers, colorants, preservatives, antioxidants, fragrances, and the like can be used as long as the effects of the present invention are not impaired.

The cosmetic of the present invention can be produced by a usual method, and can be made into a gel-like cosmetic. In the present invention, the gel form means one having a viscosity at 25 ° C. of 10,000 to 1,000,000 mPa · s. Within this range, the cosmetic is not separated, is not easily spilled from the hand when it is picked up, and is easily put out when filled in a tube container or the like.
In the present invention, when the viscosity is 10000 mPa · s or less, a BM viscometer (manufactured by TOKIMEC) is used and the viscosity is measured at 12 rpm at 25 ° C., and the viscosity is greater than 10000 mPa · s. Using a viscometer with a helical stand (manufactured by TOKIMEC), measurement is performed at 25 ° C. and 5 rpm.

Moreover, the cosmetics of this invention are pH 4-9. Within this range, the thickening polymer compound (C) can exhibit a thickening effect and is mild to the skin. The pH may be adjusted by an ordinary method using an acid or alkaline aqueous solution.
In addition, in this invention, pH is measured at 25 degreeC pH of 5 mass% aqueous solution of cosmetics.

The cosmetic composition of the present invention can be applied as a gel cleansing cosmetic composition, a skin cleansing composition such as a facial cleanser and a whole body cleansing composition.
In any case, after applying to the skin and massaging, it is used after washing and / or washing. A sufficient massage effect is obtained by the disintegrating particles, and the disintegrating particles disintegrate in the washing process and the rinsing process, so that no skin damage or itching occurs, and the washability is extremely good.

Production Example 1 (Production of disintegrating particles)
LFS-GS-2J type high speed mixer (manufactured by Fukae Kogyo Co., Ltd.) was charged with 42 g of powdered cellulose having an average particle diameter of 30 μm, 42 g of corn starch having an average particle diameter of 17 μm, and 8.5 g of micro mica having an average particle diameter of 6 μm as primary particles. Premixed. Thereafter, while rotating, 50 g of a 15 mass% aqueous solution of polyvinyl alcohol (KM-118, manufactured by Kuraray Co., Ltd.) was gradually added as a binder and granulated. The granulated product was dried at 70 ° C. for 24 hours, and 50 g of disintegrating particles (1) having an average particle size of 300 μm was obtained by sieving.

Production Example 2
In the disintegrating fine particles produced in Production Example 1, 20 g of destructible fine particles (2) having an average particle diameter of 80 μm were obtained by sieving.

Production Example 3
In the disintegrating fine particles produced in Production Example 1, 5 g of destructible fine particles (3) having an average particle diameter of 600 μm were obtained by sieving.

Examples 1-4 and Comparative Examples 1-3
Facial cleansers having the compositions shown in Table 1 were produced by a conventional method, and the viscosity and pH were measured to evaluate the particle storage stability, stringiness, feeling of use / massage, itching of the skin, and washability. The results are also shown in Table 1.

(Evaluation methods)
(1) Viscosity:
Among the facial cleansers, those having a viscosity of 10,000 mPa · s or less were measured at 25 rpm and 12 rpm using a BM viscometer (manufactured by TOKIMEC). For those having a viscosity greater than 10,000 mPa · s, the viscosity was measured at 5 rpm at 25 ° C. using a B8R type viscometer with a helical stand (manufactured by TOKIMEC).

(2) pH:
Each face wash was diluted 20 times with ion-exchanged water (5% by mass aqueous solution), and the pH was measured at 25 ° C. with pH METER F-22 (manufactured by Horiba, Ltd.).

(3) Particle storage stability:
When each facial cleanser was stored at 25 ° C. for 3 days, when it was used, the particles were disintegrated and the particles did not feel “x”, and the particles that felt and could be massaged were marked “◯”.

(4) Spinnability:
Ten professional panelists used each facial cleanser, sensory-evaluated the absence of stringing at the time of use, and judged according to the following criteria.
A: 7 to 10 people evaluated it as good.
(Triangle | delta): Six or less people evaluated it as favorable.

(5) Feeling of use / massage:
Ten professional panelists used each facial cleanser, sensoryly evaluated the feeling of massage during massage, and judged according to the following criteria.
A: 7 to 10 people evaluated it as good.
(Triangle | delta): Six or less people evaluated it as favorable.
X: It was evaluated that even one person felt discomfort and irritation.

(6) Itchy skin:
Ten professional panelists massaged each facial cleanser for 3 minutes, sensoryly evaluated the itching during the massage, and judged according to the following criteria.
○: It was evaluated that 7 to 10 people did not feel itching at all.
(Triangle | delta): Six or less persons evaluated that it did not feel an itch at all.
X: It was evaluated that even one person felt itching, discomfort, and irritation.

(7) Rinseability:
10 professional panelists used each face wash, sensory-evaluated the washability from the presence of particles during rinsing and the residual feeling of cosmetics, and judged according to the following criteria.
A: 7 to 10 people evaluated it as good.
(Triangle | delta): Six or less people evaluated it as favorable.
X: Even one person evaluated that particles remained.

Examples 5-7 and Comparative Examples 4-8
In the same manner as in Examples 1 to 4, wash-out gel cosmetics having the composition shown in Table 2 were produced, and the viscosity and pH were measured. Particle storage stability, stringiness, feeling of use / massage, skin texture Itching and washability were evaluated. The results are also shown in Table 2.

Example 8
Washable gel cosmetics having the following composition were produced by a conventional method.
The obtained gel-like cosmetic had a pH of 8.5 mass in a 5% by mass aqueous solution and a viscosity at 25 ° C. of 60000 mPa · s.

(component)
Disintegrating particles (Production Example 2) 20 (mass%)
Coconut oil fatty acid sucrose ester (38% water; DK ester S-L18A, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) 10
Glycerin 30
Mannitol 15
Acrylic acid / alkyl methacrylate (C10-30) copolymer (Pemulene TR1: manufactured by Noveo) 0.8
Sodium hydroxide solution (48%) 0.1
Phenoxyethanol 0.2
Purified water balance <br/> Total 100

Example 9
Washable gel cosmetics having the following composition were produced by a conventional method.
The obtained gel-like cosmetic had a pH of 6.5 mass in a 5% by mass aqueous solution and a viscosity at 25 ° C. of 45000 mPa · s.

(component)
Disintegrating particles (Production Example 3) 2 (mass%)
Decyl glucoside (40% water: manufactured by Kao Corporation) 10
Glycerin 30
Mannitol 15
Acrylic acid / alkyl methacrylate (C10-30) copolymer (Pemulene TR2: Noveo) 0.8
Sodium hydroxide solution (48%) 0.1
Phenoxyethanol 0.2
Purified water balance <br/> Total 100

  The gel-like cosmetics obtained in Examples 8 and 9 all have stable disintegrating particles, improved solution properties such as spinnability, can be easily thickened, and have excellent usability. It was.

Claims (3)

The following components (A), (B), (C), (D) and (E):
(A) Disintegrating particles formed by binding water-insoluble primary particles with a water-soluble binder,
(B) 15 to 70% by mass of a polyhydric alcohol,
(C) a thickening polymer compound having a carboxyl group,
(D) Water-soluble salt, less than 1% by mass,
(E) Gel cosmetics containing water and having a pH of 4-9.   The cosmetic according to claim 1, which is a detergent composition further containing an anionic surfactant.   The cosmetic according to claim 1, which is a cleaning composition or a massage cosmetic containing a nonionic surfactant.