JP5832118B2 - Powder-containing cosmetic - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a powder-containing cosmetic material that has reduced skin stickiness, improved smoothness and durability, is excellent in use feeling, and can be suitably used for a non-aerosol-type spray container.

  In recent years, for powder-containing cosmetics using aqueous solvents (hereinafter sometimes referred to as aqueous powder-containing cosmetics), silica (anhydrous silica) is used for the purpose of suppressing the stickiness of the skin and imparting a good feeling of use. A technology for blending acid) has been researched and developed. As such a technique, conventionally, in the acidic to weakly acidic region, the redispersibility of silicic acid is poor, and aggregates generated when settling are used in the discharge port of the container containing the aqueous powder-containing cosmetic. There is a problem that clogging occurs.

For the purpose of solving the above-mentioned problem, as an aqueous powder-containing cosmetic, a technology for preventing aggregation of silicic anhydride using a specific copolymer as a dispersant (see, for example, Patent Document 1), agar Technology for preventing aggregation of silicic anhydride (for example, see Patent Document 2), Technology for preventing aggregation of silicic acid by regulating the shape, particle size, and sedimentation speed of silicic acid (for example, Patent Document) 3), and a technique for preventing aggregation of silicic anhydride using a specific nonionic surfactant (for example, see Patent Document 4).
However, even with these proposals, it is difficult to completely suppress the aggregation of silicic anhydride in the aqueous powder-containing cosmetic in the acidic to weakly acidic region, and the silicic anhydride is not uniformly redispersed. There is a problem that the skin becomes sticky and the use feeling is not good. Moreover, when such a powder-containing cosmetic is accommodated in a non-aerosol-type spray container, there is a problem that clogging occurs at the discharge port of the container due to aggregation of silicic acid anhydride contained in the powder-containing cosmetic. is there.

Therefore, in an acidic to weakly acidic region, the anhydrous silicic acid is uniformly re-dispersed, so that the stickiness of the skin is suppressed, the smooth feeling and its sustainability are improved, and the powder using an aqueous solvent is excellent in use feeling. At present, the rapid development of body-containing cosmetics is strongly desired.
Further, even when the powder-containing cosmetic is contained in a non-aerosol-type injection container, it is excellent in redispersibility of the silicic anhydride and suppresses its aggregation, thereby clogging the discharge port of the container. At present, there is a strong demand for the rapid development of powder-containing cosmetics that do not cause any problems.

Republished patent WO2005 / 072585 JP-A-11-116432 JP-A-11-001419 JP 2001-348317 A

This invention is made | formed in view of this present condition, and makes it a subject to solve the said various problems in the past and to achieve the following objectives. That is, the present invention is a powder in which the silicic acid anhydride is uniformly redispersed in the acidic to weakly acidic region, thereby suppressing the stickiness of the skin, improving the smoothness and the sustainability thereof, and being excellent in the feeling of use. It aims at providing a contained cosmetic.
Further, even when the powder-containing cosmetic is contained in a non-aerosol-type injection container, it is excellent in redispersibility of the silicic anhydride and suppresses its aggregation, thereby clogging the discharge port of the container. An object of the present invention is to provide a powder-containing cosmetic that does not cause odor.

As a result of intensive studies to achieve the above object, the inventors of the present invention have found that silicic acid anhydride is uniformly regenerated in the acidic to weakly acidic region due to the synergistic effect of the cationic polymer and the nonionic surfactant. Since it was dispersed, it was found that the stickiness of the skin was suppressed, the smoothness and its sustainability were improved, and the powder-containing cosmetic material was excellent in use feeling, and the present invention was completed.
Further, even when the powder-containing cosmetic is contained in a non-aerosol-type injection container, it is excellent in redispersibility of the silicic anhydride and suppresses its aggregation, thereby clogging the discharge port of the container. As a result, the present invention has been completed.

This invention is based on the said knowledge by the present inventors, and as means for solving the said subject, it is as follows. That is,
<1> Silica, a cationic polymer, a nonionic surfactant, and water at least, and a ratio of the cationic polymer to the nonionic surfactant (cationic polymer / nonionic interface) The powder-containing cosmetic is characterized in that the active agent) is 0.02 or more and 10 or less, and the pH at 25 ° C. is pH 3 or more and less than pH 7.
<2> The powder-containing cosmetic according to <1>, wherein the anhydrous silicic acid is spherical anhydrous silicic acid.
<3> The powder-containing cosmetic according to any one of <1> to <2>, wherein the content of the cationic polymer is 0.1% by mass to 2% by mass.
<4> The powder-containing cosmetic according to any one of <1> to <3>, wherein the cationic polymer has a weight average molecular weight of 2,000,000 or less.
<5> Nonionic surfactant is polyoxyethylene alkyl ether, sorbitan fatty acid ester, fatty acid glyceryl, polyoxyethylene sorbitan fatty acid ester, fatty acid polyethylene glycol, polyoxyethylene hydrogenated castor oil, polyoxyethylene glyceryl ether fatty acid ester, poly The powder-containing cosmetic according to any one of <1> to <4>, wherein the cosmetic is one or more selected from oxyethylene hydrogenated castor oil fatty acid ester and polyglycerin fatty acid ester.
<6> Nonionic surfactant is polyoxyethylene (20) isostearyl ether, polyoxyethylene (60) hydrogenated castor oil, polyoxyethylene (80) sorbitan fatty acid ester, polyoxyethylene (50) glyceryl triisostearate A nonionic surfactant having a polyoxyethylene group having an average EO addition mole number of 20 to 80 selected from polyoxyethylene (80) isostearic acid hydrogenated castor oil and polyethylene glycol monostearate (40EO) The powder-containing cosmetic according to any one of <1> to <5>. (However, the numbers in parentheses indicate the average number of EO addition moles.)
<7> The powder-containing cosmetic according to any one of <1> to <6>, wherein the content of the nonionic surfactant is 0.2% by mass to 3% by mass.
<8> Any one of <1> to <7>, wherein the mass ratio of the cationic polymer to the nonionic surfactant (cationic polymer / nonionic surfactant) is 0.1 or more and 5 or less. The powder-containing cosmetic described.
<9> The powder-containing cosmetic according to any one of <1> to <8>, further containing an antiperspirant deodorizing component.
<10> The powder-containing cosmetic according to any one of <1> to <9>, wherein the antiperspirant deodorizing component is at least one of chlorohydroxyaluminum and zinc paraphenolsulfonate.
<11> The powder-containing cosmetic according to any one of <1> to <10>, wherein the powder-containing cosmetic is used in a non-aerosol type injection container.

According to the present invention, various problems in the prior art can be solved, and in the acidic to weakly acidic region, silicic acid anhydride is uniformly re-dispersed, thereby suppressing the stickiness of the skin and improving the smooth feeling and its sustainability. It is possible to provide a powder-containing cosmetic material that is excellent in use feeling.
Further, even when the powder-containing cosmetic is contained in a non-aerosol-type injection container, it is excellent in redispersibility of the silicic anhydride and suppresses its aggregation, thereby clogging the discharge port of the container. It is possible to provide a powder-containing cosmetic that does not cause the problem.

(Powder-containing cosmetics)
The powder-containing cosmetic of the present invention comprises at least silicic anhydride (component A), a cationic polymer (component B), a nonionic surfactant (component C), and water (component D). It preferably contains a sweat deodorant component (component E), and further contains other components as necessary.

<Component A: Silicic anhydride>
The silicic anhydride is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include crushed silicic anhydride and spherical silicic anhydride. These may be used individually by 1 type and may use 2 or more types together.
Among these, spherical silicic acid anhydride is preferable in that redispersibility, clogging, and stickiness of the skin are suppressed, the feeling of smoothness and its durability is improved, and the feeling of use is excellent.

  The anhydrous silicic acid is not particularly limited as long as it is amorphous, and an appropriately synthesized product or a commercially available product may be used. Examples of the commercially available products include crushed silicic acid anhydrides such as Silicia 530 and Silicia 730 (both manufactured by Fuji Silysia Chemical Co., Ltd.); Sunsphere H-31 and Sunsphere H-121 (both are AGC ES). Spherical silicic acid such as ITEC Co., Ltd. may be used.

There is no restriction | limiting in particular as a volume average particle diameter of the said silicic acid anhydride, Although it can select suitably according to the objective, 2 micrometers-14 micrometers are preferable, and 2 micrometers-11 micrometers are more preferable.
If the volume average particle size of the silicic acid anhydride is less than 2 μm, a smooth feeling may not be obtained, and if it exceeds 14 μm, the sustainability of the smooth feeling may be reduced. On the other hand, when the volume average particle size of the silicic anhydride is in a more preferable range, it is advantageous in that the stickiness of the skin is suppressed, the feeling of smoothness and the durability thereof are improved, and the feeling of use is excellent.
The volume average particle diameter of the silicic anhydride can be measured with a particle size distribution measuring device (for example, product name “LS13 320” manufactured by Beckman Coulter, Inc.).

There is no restriction | limiting in particular as content in the said powder containing cosmetics of the said silicic anhydride, Although it can select suitably according to the objective, 0.2 mass%-10 mass% are preferable, 0.5 mass % To 5% by mass is more preferable.
When the content is less than 0.2% by mass, a feeling of smoothness may not be obtained. When the content exceeds 10% by mass, bulkiness or white residue may occur. On the other hand, when the content is in a more preferable range, it is advantageous in that the stickiness of the skin is suppressed, the smooth feeling and its sustainability are improved, and the feeling of use is excellent.

  By containing the silicic anhydride, the stickiness of the skin is suppressed, and the dry feeling and the sustainability thereof are improved, and a powder-containing cosmetic excellent in use feeling can be obtained.

<Component B: Cationic polymer>
The cationic polymer is not particularly limited and may be appropriately selected depending on the intended purpose. For example, cationized cellulose, cationized cellulose derivative, cationized starch, cationized guar gum, cationized guar gum derivative, diallyl quaternary Ammonium salt homopolymer, quaternized polyvinylpyrrolidone derivative, polyglycol polyamine condensate, dialkyldiallylammonium salt / acrylamide copolymer, vinylimidazolium trichloride / vinylpyrrolidone copolymer, hydroxyethylcellulose / dimethyldiallylammonium chloride copolymer Polymer, vinylpyrrolidone / quaternized dimethylaminoethyl methacrylate copolymer, polyvinylpyrrolidone / alkylaminoacrylate copolymer, polyvinylpyrrolidone / alkyl Amino acrylate / vinyl caprolactam copolymers, vinylpyrrolidone / methacrylamide propyl trimethylammonium chloride copolymers, and alkyl acrylamide / acrylate / alkylaminoalkyl acrylamide / polyethylene glycol methacrylate copolymers. These may be used individually by 1 type and may use 2 or more types together.
Among these, the silicic anhydride is uniformly re-dispersed and the aggregation can be suppressed, and in terms of clogging, a polymer of dimethyldiallylammonium chloride, a dimethyldiallylammonium chloride / acrylamide copolymer, acrylic acid / Dimethyldiallylammonium chloride copolymer and acrylic acid / dimethyldiallylammonium chloride / acrylamide copolymer are preferred.

  There is no restriction | limiting in particular as said cationic polymer, What was synthesize | combined suitably may be used and a commercial item may be used. Examples of the commercially available products include cationized celluloses such as MERQUAT 10 (display name “Polyquaternium-10”, manufactured by Nalco Japan Co., Ltd.); MERQUAT 100, MERQUAT 106 (both display names “Polyquaternium-6”, Nalco Japan). Dimethyl diallylammonium chloride such as MERQUAT 550, MERQUAT S, MERQUAT 2200, MERQUAT 740 (all of which are indicated by “Polyquaternium-7”, manufactured by Nalco Japan Co., Ltd.) Acrylamide copolymer; MERQUAT 280, MERQUAT 281 and MERQUAT 295 (all are named “Polyquaternium-22”, Nalco Japan) Acrylic acid / dimethyldiallylammonium chloride copolymer such as MERQUAT Plus 3330 (display name “Polyquaternium-39”, manufactured by Nalco Japan Co., Ltd.), etc. Is mentioned.

There is no restriction | limiting in particular as a weight average molecular weight of the said cationic polymer, Although it can select suitably according to the objective, 2,000,000 or less is preferable, 100,000 or more and 2,000,000 or less are more preferable. 100,000 to 1,600,000 is particularly preferable.
When the weight average molecular weight of the cationic polymer exceeds 2,000,000, redispersibility may not be sufficient, and clogging and stickiness may occur. On the other hand, if the weight average molecular weight of the cationic polymer is in a more preferable range, the silicic anhydride is uniformly redispersed, the aggregation can be suppressed, and there is no clogging or stickiness. is there.
The weight average molecular weight of the cationic polymer is a value measured using GPC-MALLS, and a sample solution diluted with a mobile phase having a pure polymer concentration of about 1,000 ppm is used as a TSK-GELA column (Tosoh Corporation). The wavelength of about 633 nm can be measured with a multi-angle light scattering detector using 0.5 mol / L sodium perchlorate solution as a mobile phase. As a standard product, polyethylene glycol having a known molecular weight can be used.

There is no restriction | limiting in particular as content in the said powder containing cosmetics of the said cationic polymer, Although it can select suitably according to the objective, 0.01 mass%-3 mass% are preferable, 0.1 mass % To 2% by mass is more preferable.
When the content is less than 0.01% by mass, the silicic anhydride is not uniformly redispersed, and the aggregation may not be suppressed. When the content exceeds 3% by mass, stickiness occurs. There is. On the other hand, when the content is within a more preferable range, the silicic anhydride is uniformly re-dispersed, and aggregation thereof can be suppressed, which is advantageous in that there is no clogging or stickiness.

  By containing the cationic polymer, the silicic acid anhydride is uniformly re-dispersed, the aggregation can be suppressed, and there is no clogging, and the powder-containing makeup has an excellent feeling of use (free feeling and no stickiness). It can be a fee.

<Component C: Nonionic surfactant>
The nonionic surfactant is not particularly limited and may be appropriately selected depending on the intended purpose. For example, polyoxyethylene alkyl ether, sorbitan fatty acid ester, fatty acid glyceryl, polyoxyethylene sorbitan fatty acid ester, fatty acid polyethylene glycol , Polyoxyethylene hydrogenated castor oil, polyoxyethylene glyceryl ether fatty acid ester, polyoxyethylene hydrogenated castor oil fatty acid ester, polyglycerin fatty acid ester, fatty acid ester and the like. These may be used individually by 1 type and may use 2 or more types together.
Among these, nonionic surfactants having a polyoxyethylene group are preferable in that the redispersibility of the silicic anhydride is improved and clogging can be suppressed.

There is no restriction | limiting in particular as ethylene oxide (EO) addition mole number in the nonionic surfactant which has the said polyoxyethylene (POE) group, Although it can select suitably according to the objective, 20-80 are preferable.
When the EO addition mole number is less than 20 or exceeds 80, clogging of silicic anhydride may not be suppressed. On the other hand, when the EO addition mole number is in a more preferable range, it is advantageous in that clogging of silicic acid anhydride is suppressed.

As the polyoxyethylene alkyl ether, ethylene oxide has an average added mole number of 20 to 25, and has 10 to 22 carbon atoms and is either saturated or unsaturated, either branched or linear alkyl. Polyoxyethylene alkyl ether having a chain is preferable, and specific examples include polyoxyethylene isostearyl ether (20EO to 25EO), polyoxyethylene octyldodecyl ether (20EO to 25EO), and the like.
As the polyoxyethylene sorbitan fatty acid ester, ethylene oxide average added mole number is 20 to 80, and the fatty acid has 12 to 18 carbon atoms and is either saturated or unsaturated, either branched or linear Polyoxyethylene sorbitan fatty acid esters having an alkyl chain are preferred.
As said polyoxyethylene hydrogenated castor oil, the polyoxyethylene hydrogenated castor oil whose ethylene oxide average addition mole number is 20-80 is preferable.
The polyoxyethylene hydrogenated castor oil fatty acid ester is preferably a polyoxyethylene hydrogenated castor oil fatty acid ester having an ethylene oxide average addition mole number of 20 to 50, specifically, polyoxyethylene isostearic acid hydrogenated castor oil (20 to 50).
As said polyoxyethylene glyceryl ether fatty acid ester, ethylene oxide average added mole number is 20 to 60, carbon number of fatty acid is 12 to 18, and either branched or linear which is either saturated or unsaturated Polyoxyethylene glyceryl ether fatty acid esters having an alkyl chain are preferred, and specific examples include glyceryl polyoxyethylene isostearate (20-60), glyceryl polyoxyethylene triisostearate (20-40), and the like.
In addition, the numerical value in a parenthesis shows average EO addition mole number.
Among these nonionic surfactants, in terms of redispersibility and no clogging, the average number of EO addition moles is 20 to 25, the number of carbons is 10 to 22, and either saturated or unsaturated. Polyoxyethylene alkyl ether having any branched or straight chain alkyl chain; average EO addition mole number is 20-80, and fatty acid has 12-18 carbon atoms, either saturated or unsaturated A polyoxyethylene sorbitan fatty acid ester having a branched or straight chain alkyl chain is preferable, and a polyoxyethylene hydrogenated castor oil having an average EO addition mole number of 20 to 80 is more preferable.

  There is no restriction | limiting in particular as said nonionic surfactant, What was synthesize | combined suitably may be used and a commercial item may be used. Examples of the commercially available products include sorbitan isostearate such as EMALEX SPIS-100 (manufactured by Nippon Emulsion Co., Ltd.); polyglyceryl stearate such as EMALEX MSG-6K (manufactured by Nippon Emulsion Co., Ltd.); EMALEX 1820 (manufactured by Nippon Emulsion Co., Ltd.). ) Polyoxyethylene (20) isostearyl ether; polyoxyethylene (60) hydrogenated castor oil such as EMALEX HC-60 (manufactured by Nippon Emulsion Co., Ltd.); poly such as EMALEX ET-8020 (manufactured by Nippon Emulsion Co., Ltd.) Oxyethylene (80) sorbitan fatty acid ester; polyoxyethylene (50) glyceryl triisostearate such as EMALEX GWIS-350 (manufactured by Nippon Emulsion Co., Ltd.); EMALEX RWIS-150 (day And monoisostearate polyoxyethylene (50) hydrogenated castor oil such as Emulex 840 (manufactured by Nippon Emulsion Co., Ltd.).

There is no restriction | limiting in particular as content in the said powder containing cosmetics of the said nonionic surfactant, Although it can select suitably according to the objective, 0.05 mass%-5 mass% are preferable, and 0. 2 mass%-3 mass% are more preferable.
When the content is less than 0.05% by mass, the silicic anhydride is not uniformly redispersed, and clogging may not be suppressed. When the content exceeds 5% by mass, stickiness occurs. There is. On the other hand, when the content is within a more preferable range, it is advantageous in that the silicic anhydride is uniformly redispersed and clogging can be suppressed.

  By using the nonionic surfactant in combination with the cationic polymer, it is possible to obtain a powder-containing cosmetic that can improve the redispersibility of the silicic anhydride and suppress clogging.

<Ratio of component B to component C (B / C)>
The ratio (B / C) between the cationic polymer (component B) and the nonionic surfactant (component C) is not particularly limited as long as it is 0.02 or more and 10 or less, depending on the purpose. Although it can select suitably, from the point of re-dispersibility and clogging, 0.05-5 is more preferable, and 0.1-5 is especially preferable.
When the ratio (B / C) is less than 0.02, the silicic anhydride is not uniformly redispersed, and the aggregation may not be suppressed. May not be uniformly redispersed, and clogging may not be suppressed. On the other hand, when the ratio (B / C) is in a particularly preferable range, it is advantageous in that the silicic anhydride is uniformly redispersed and clogging can be suppressed.

  By adjusting the ratio (B / C) of the cationic polymer (component B) and the nonionic surfactant (component C) to 0.02 or more and 10 or less, the present invention can be used in the acidic to weakly acidic region. In the powder-containing cosmetic, the redispersibility of the silicic acid anhydride is improved, and aggregation thereof can be suppressed. In addition, in the water of pH 3 or more and less than pH 7, the anhydrous silicic acid easily forms a hydrogen bond between silanol groups on the surface of the particle and easily aggregates. However, the cationic polymer (component B) and the nonionic surfactant ( The redispersibility of the silicic acid anhydride in water is improved due to the synergistic effect obtained by mixing the component C) with the above ratio.

<Component D: Water>
Examples of the water include ion-exchanged water, ultrafiltrated water, reverse osmosis water, pure water such as distilled water, and ultrapure water. Although there is no restriction | limiting in particular, Although it can select suitably according to the objective, 30 mass%-90 mass% are preferable, 40 mass%-80 mass% are more preferable, 50 mass%-70 mass% are especially preferable.

  There is no restriction | limiting in particular as content of the said water, According to the objective, it can select suitably, For example, the said component A, component B, component C, and other components which are contained in the said powder containing cosmetics are included. The remaining balance can be the content.

  The water can spread the silicic anhydride (component A), the cationic polymer (component B), and the nonionic surfactant (component C) uniformly on the skin. Retention property and usability are improved.

<Component E: Antiperspirant deodorant component>
The antiperspirant deodorant component is not particularly limited and may be appropriately selected depending on the intended purpose. For example, citric acid, malic acid, gluconic acid, lactic acid, ethylenediaminetetraacetic acid, pyrrolidonecarboxylic acid, paraphenolsulfonic acid, etc. Organic acids or salts thereof; inorganic compounds such as aluminum oxide and chlorohydroxyaluminum. These may be used individually by 1 type and may use 2 or more types together.
Among these, at least one compound of chlorohydroxyaluminum and zinc paraphenolsulfonate is preferable from the viewpoint of antiperspirant deodorizing effect.

  There is no restriction | limiting in particular as said antiperspirant deodorizing component, What was synthesize | combined suitably may be used and a commercial item may be used. Examples of the commercially available products include chlorohydroxyaluminum (manufactured by Summit Research Labs, trade name “MICRO-DRY 3115”), zinc paraphenol sulfonate (manufactured by Matsumoto Fine Chemical Co., Ltd., trade name “zinc sulfosulfocolate”), and the like. It is done.

There is no restriction | limiting in particular as content in the said powder containing cosmetics of the said antiperspirant deodorizing component, Although it can select suitably according to the objective, 0.2 mass%-15 mass% are preferable, and 2 mass% 10 mass% is more preferable.
When the content is less than 0.2% by mass, the sustainability of the deodorizing effect may be insufficient. When the content exceeds 15% by mass, the feeling of smoothness and the persistence may be inferior and stickiness may occur. is there. On the other hand, when the content is in a more preferable range, it is advantageous in that the deodorizing effect can be effectively exhibited.

  With the antiperspirant deodorizing component, the antiperspirant deodorizing effect can be effectively exhibited in the powder-containing cosmetic of the present invention.

<Other ingredients>
In the powder-containing cosmetic of the present invention, optional components added to the normal powder-containing cosmetic can be blended as the other components as long as the effects of the present invention are not impaired.

  The other components are not particularly limited and may be appropriately selected depending on the purpose. For example, a pH adjuster is preferably used, and if necessary, fats and oils, waxes, silicones, carbonized Hydrogen oil, higher fatty acid, higher alcohol, synthetic ester oil, surfactant other than the nonionic surfactant, polymer compound other than the cationic polymer, antioxidant, dye, organic acid, alkali agent, preservative, Examples include ultraviolet absorbers, chelating agents, humectants, thickeners, cooling agents, anti-inflammatory agents, amino acids, vitamin agents, and various plant extracts. These may be used individually by 1 type and may use 2 or more types together.

The pH adjuster is not particularly limited as long as it can adjust the pH at 25 ° C. of the powder-containing cosmetic of the present invention to 3 or more and less than 7 and may be appropriately selected according to the purpose. However, citric acid, sodium hydroxide and the like are preferable because they are less irritating to the skin.
There is no restriction | limiting in particular as the measuring method of said pH, According to the objective, it can select suitably, For example, the method etc. which measure at 25 degreeC with a pH meter (the Horiba make, brand name "D-51"), etc. Is mentioned.

<Preparation method>
There is no restriction | limiting in particular as a preparation method of the powder containing cosmetics of this invention, According to the objective, it can select suitably, For example, the said cationic polymer (component B) and the said water are added to the said water (component D). What was prepared such that the ratio (B / C) to the nonionic surfactant (component C) was 0.02 or more and 10 or less, the silicic anhydride (component A), and if necessary, After the antiperspirant deodorant component (component E) and the other components are uniformly mixed, the antiperspirant deodorant component (component E) can be prepared by adjusting with a pH adjuster so that the pH at 25 ° C. is not less than pH 3 and less than pH 7. .

  The pH of the powder-containing cosmetic is not particularly limited as long as it is not less than pH 3 and less than pH 7, and can be appropriately selected according to the purpose. However, the pH at 25 ° C. dissolves the antiperspirant deodorant component described below. PH 4 to pH 6 is more preferable from the viewpoints of good properties and low irritation to the skin.

  The viscosity of the powder-containing cosmetic is not particularly limited and may be appropriately selected depending on the intended purpose. However, when applied to a spray container, the viscosity at 25 ° C. improves dispersibility of silicic anhydride. In view of good spray properties, 10 mPa · s or less is preferable.

<Dosage form>
The dosage form of the powder-containing cosmetic of the present invention is not particularly limited as long as the effects of the present invention are not impaired, and can be appropriately selected according to the purpose. For example, non-aerosol, water-oil two-phase A wide range of dosage forms such as a system, a water-oil-powder three-phase system, etc. That is, it can be widely applied to various dosage forms such as non-aerosol, lotion, mist, spray, impregnated sheet and the like.
Moreover, even if the powder-containing cosmetic of the present invention is contained in a non-aerosol-type spray container (trigger-type spray container) described in JP 2010-235723 A or the like, the redispersibility of the silicic anhydride is achieved. By suppressing the aggregation of the container, it is possible to obtain a powder-containing cosmetic that does not clog the discharge port of the container.

(Use)
The powder-containing cosmetic of the present invention has an acidic to slightly acidic region in which silicic acid anhydride is uniformly re-dispersed, thereby suppressing the stickiness of the skin, improving the smoothness and sustainability, and improving the feeling of use. Since it is excellent, it can be suitably applied to antiperspirant / deodorant agents, lotions, deodorants, cosmetics, body powders, and the like. Examples of the dosage form include mist, spray, and the like. Specifically, it can be suitably applied to deodorant mist, deodorant lotion, cosmetic mist, water spray, and the like, and deodorant lotion is particularly preferable.

  Next, the present invention will be described more specifically with reference to examples and comparative examples of powder-containing cosmetics, but the present invention is not limited to the following examples.

(Examples 1-46 and Comparative Examples 1-9)
<Preparation of deodorant lotion>
Water (component D), silicic anhydride (component A), cationic polymer (component B), and nonionic surfactant (component C), and if necessary, an antiperspirant deodorizing component (component E), and Arbitrary components were added in predetermined amounts (unit: mass%) shown in Tables 1 to 4 below, and mixed uniformly using paddle stirring with a three-one motor. For this, citric acid or sodium hydroxide was used as a pH adjuster, and the mixed solution in Examples 1 to 31 and Examples 33 to 35, and Comparative Examples 1 to 5, Comparative Example 8 and Comparative Example 9 was adjusted to pH 5. The mixture solution in Example 32 was adjusted to pH 3, the mixture solution in Comparative Example 6 was adjusted to pH 2, and the mixture solution in Comparative Example 7 was adjusted to pH 7 Then, the mixed liquid in Examples 36 to 46 was adjusted to pH 5 using sodium hydroxide as a pH adjuster to prepare a deodorant lotion (sample) that is a powder-containing cosmetic.
In addition, pH of the liquid mixture in Examples 1-46 and Comparative Examples 1-9 was performed by measuring with a pH meter (Horiba Seisakusho make, brand name "D-51") in 25 degreeC. In addition, Table 5 shows the names of the products used, the names of the manufacturing companies, and the like.
Next, various characteristics of the deodorant lotions (samples) of Examples 1 to 46 and Comparative Examples 1 to 9 were evaluated as follows. The results are shown in Tables 1 to 4.

<Evaluation of redispersibility>
100 mL of the sample was placed in a polyethylene container (trade name “PH-100”), centrifuged at 3,000 rpm for 10 minutes to settle the powder, and then allowed to stand at 40 ° C. for 1 month. Using this as a sample, it was repeatedly shaken horizontally with a swing width of 15 cm (one reciprocation / second), and the number of times until the powder on the bottom surface was completely dispersed was measured. The test was carried out for each of ten pieces, and the average value was calculated.
[Evaluation criteria]
◎: The average number of dispersions is less than 5 ◎: The average number of dispersions is 5 or more and less than 10 times ○: The average number of dispersions is 10 or more and less than 15 times △: The average number of dispersions is 15 or more and less than 20 X: The average of the number of times of dispersion is 20 times or more

<Evaluation of clogging>
100 mL of the sample was put in a non-aerosol type spray container (trigger type spray container; trigger: Mitani Valve Co., Ltd., trade name “Z-305”, polyethylene container; trade name “PH-100”) at 3,000 rpm. After centrifuging for 10 minutes to settle the powder, it was allowed to stand at 40 ° C. for 1 month. Using this as a sample, spraying was carried out 15 times every other day, and when the discharge amount was 50% of normal spraying, it was judged that clogging occurred. In the column of evaluation results of Examples and Comparative Examples, the number of days on which clogging occurred was described.
[Evaluation criteria]
◎◎: The number of days clogged is 180 days or more from the start of the test ◎: The number of days until clogging occurs is 150 days or more and less than 180 days ○: The number of days until clogging occurs is 120 days or more until the test starts Less than 150 days Δ: The number of days until clogging occurs 90 days or more and less than 120 days from the start of the test ×: The number of days until clogging occurs is less than 90 days from the start of the test

<Evaluation of smooth feeling>
100 mL of the sample was placed in a non-aerosol type spray container (trigger type spray container; trigger: Mitani Valve Co., Ltd., trade name “Z-305”, polyethylene container; trade name “PH-100”), and 20 people in general Panelists used it on the chest, axilla, and arms, and responded with a feeling of smoothness 1 hour after treatment. In the column of evaluation results of Examples and Comparative Examples, the results were entered according to the following criteria.
[Evaluation criteria]
◎: 16 to 20 people who answered that “the coated part is more smooth than the non-coated part” ○: 11 people who answered that “the coated part is more smooth than the non-coated part” Names to 15 people △: Respondents who answered “Applied part is more smooth than unapplied part” 6 to 10 persons ×: “Applied part is more smooth than unapplied part” Less than 5 people

<Evaluation of stickiness>
100 mL of the sample was placed in a non-aerosol type spray container (trigger type spray container; trigger: Mitani Valve Co., Ltd., trade name “Z-305”, polyethylene container; trade name “PH-100”), and 20 people in general Panelists were asked to use it on their chests, axillae, and arms, and asked them to answer their stickiness 10 minutes after treatment. In the column of evaluation results of Examples and Comparative Examples, the results were entered according to the following criteria.
[Evaluation criteria]
◎: 16 to 20 people who answered "I don't feel sticky" ○: 11 to 15 people who answered "I don't feel sticky" △: People who answered "I don't feel sticky" However, 6 to 10 people ×: 5 people or less responded that they did not feel sticky

<Evaluation of remaining white>
100 mL of the sample was placed in a non-aerosol type spray container (trigger type spray container; trigger: Mitani Valve Co., Ltd., trade name “Z-305”, polyethylene container; trade name “PH-100”), and 20 people in general Panelists used it on their chests, axillae and arms, and asked them to answer “no white residue” 10 minutes after use. In the column of evaluation results of Examples and Comparative Examples, the results were entered according to the following criteria.
[Evaluation criteria]
A: 16 to 20 people who answered “no white residue” ○: 11 to 15 people who answered “no white residue” Δ: people who answered “no white residue” However, 6 to 10 people ×: 5 people or less responded that there is no white residue

<Sustainability evaluation of deodorization effect>
For 20 male and female subjects, 0.1 g of the sample was applied to each axilla, nothing was treated on the other axilla, and then pre-cleaned gauze was sewn to the axilla. I had my shirt worn for 8 hours. Eight hours after the start of wearing, the expert panelist sensory-evaluated the odor adhering to the gauze (5 cm × 5 cm) based on the following evaluation criteria.
First, the odor attached to the gauze of each subject was evaluated according to the following criteria.
[Evaluation criteria]
3 points: The gauze on the application side is much weaker in odor intensity than the gauze in the non-application area. 2 points: The gauze on the application area side is considerably weaker in odor than the gauze in the non-application area. Gauze is slightly weaker in odor intensity than the gauze in the non-application area 0 point: The gauze on the application area side is equivalent to the gauze in the non-application area

Next, the average score of 20 subjects was obtained, and based on this, the sustainability of the deodorizing effect was evaluated as follows.
[Evaluation criteria]
◎: The average score of 20 subjects is 2.5 or more and 3 or less ○: The average score of 20 subjects is 2 or more and less than 2.5 points △: The average score of 20 subjects is 1 or more 2 Less than point ×: The average score of 20 subjects is less than 1 point

From the results of Examples 1 to 4 in Table 1, it was found that the deodorant lotion using spherical silicic acid was good in terms of smooth feeling, non-stickiness, and white residue.
Further, from the results of Examples 4 to 8 in Table 1, the deodorant lotion using the cationic polymer (component B) having a weight average molecular weight of 2,000,000 or less has good redispersion of the silicic acid anhydride, It was found that even when the container was accommodated in the non-aerosol type injection container, the discharge port of the container was not clogged and the stickiness was good.
Moreover, from the results of Examples 8 to 17 in Table 1, in the deodorant lotion using the nonionic surfactant (component C) having a polyoxyethylene (POE) group having an average EO addition mole number of 20 to 80, It was found that the redispersibility of the silicic acid anhydride was good and clogging did not occur at the discharge port of the container even when it was housed inside a non-aerosol type injection container.

From the results of Examples 18 to 21 and 31 in Table 2, in the deodorant lotion in which the content of the anhydrous silicic acid (component A) was 0.5% by mass to 5% by mass, smooth feeling, no stickiness, and white It has been found that the rest is good.
Moreover, from the results of Examples 22 to 25 and 31 in Table 2, in the deodorant lotion in which the content of the nonionic surfactant (component C) was 0.2% by mass to 3% by mass, It was found that the redispersibility was good, and even if the redispersibility was accommodated inside the non-aerosol type injection container, the discharge port of the container was not clogged and the stickiness was good.
Moreover, from the results of Examples 26 to 35 in Table 2, the ratio (B / C) between the cationic polymer (component B) and the nonionic surfactant (component C) is 0.1 or more and 5 or less. In the deodorant lotion, the redispersibility of the silicic acid anhydride is good, and even when stored in a non-aerosol type injection container, the discharge port of the container is not clogged and the stickiness is good. I understood.

  From the results of Examples 36 to 46 in Table 3, by setting the content of the antiperspirant deodorizing component (component E) to 2% by mass to 10% by mass, the deodorizing effect persistence, no stickiness, and the white residue It turned out that it becomes favorable.

From the results of Comparative Example 1 in Table 4, it was found that stickiness occurred in the deodorant lotion that did not use the anhydrous silicic acid.
Further, from the results of Comparative Examples 2 to 5 in Table 4, in the deodorant lotion not containing any of the cationic polymer (component B) and the nonionic surfactant (component C), It was found that when the deodorant lotion was housed inside a non-aerosol type injection container, the discharge port of the container was clogged because of poor dispersibility.
In addition, from the results of Comparative Examples 6 and 7 in Table 4, in cosmetics having a pH of less than 3 and a pH of 7 or more, the redispersibility of the silicic acid anhydride is poor, and the deodorant lotion is contained inside a non-aerosol-type injection container. It was found that the discharge port of the container is clogged.
Further, from the results of Comparative Examples 8 and 9 in Table 4, the ratio (B / C) between the cationic polymer (component B) and the nonionic surfactant (component C) is less than 0.02, and When it exceeded 10, the redispersibility of the silicic acid anhydride was poor, and it was found that when the deodorant lotion was accommodated inside a non-aerosol type injection container, the discharge port of the container was clogged.

The powder-containing cosmetic of the present invention has an acidic to slightly acidic region in which silicic acid anhydride is uniformly re-dispersed, thereby suppressing the stickiness of the skin, improving the smoothness and sustainability, and improving the feeling of use. Since it is excellent, it can be suitably applied to, for example, a deodorant agent, an antiperspirant deodorant agent, a lotion, a cosmetic liquid, a sunscreen agent, a whitening agent, a body soap, a facial cleanser, a hand soap. In particular, it is more preferable to apply to a deodorant agent.
In addition, the powder-containing cosmetic of the present invention is excellent in redispersibility of the silicic anhydride in an acidic to weakly acidic region, and clogging does not occur at the discharge port of the container by suppressing the aggregation. , Deodorant lotion, deodorant mist, deodorant lotion, cosmetic mist, water spray and the like.

Claims (4)

Including at least silicic anhydride, a cationic polymer, a nonionic surfactant, and water,
The cationic polymer is cationized cellulose, dimethyldiallylammonium chloride polymer, dimethyldiallylammonium chloride / acrylamide copolymer, acrylic acid / dimethyldiallylammonium chloride copolymer, and acrylic acid / dimethyldiallylammonium chloride / acrylamide copolymer. One or more selected from polymers;
The content of the cationic polymer is 0.01% by mass to 3% by mass,
Content of the said nonionic surfactant is 0.05 mass%-5 mass%,
The mass ratio of the cationic polymer to the nonionic surfactant (cationic polymer / nonionic surfactant) is 0.02 or more and 10 or less,
PH at 25 ° C. is Ri pH7 less der pH3 above,
Powder-containing cosmetic wherein Rukoto used to accommodate the non-aerosol injection vessel. The weight average molecular weight of the cationic polymer, the powder-containing cosmetic composition according to claim 1 is 2,000,000 or less.   Nonionic surfactant is polyoxyethylene alkyl ether, sorbitan fatty acid ester, fatty acid glyceryl, polyoxyethylene sorbitan fatty acid ester, fatty acid polyethylene glycol, polyoxyethylene hydrogenated castor oil, polyoxyethylene glyceryl ether fatty acid ester, polyoxyethylene cured The powder-containing cosmetic according to any one of claims 1 to 2, which is one or more selected from castor oil fatty acid ester and polyglycerin fatty acid ester.   Furthermore, the powder containing cosmetics in any one of Claim 1 to 3 containing an antiperspirant deodorant component.