JP6235225B2 - Manufacturing method of cosmetics - Google Patents

Description

  The present invention relates to a method for producing a cosmetic.

  Since hydroxycarboxylate zinc has a high sebum secretion inhibitory effect, it is used in cosmetics aimed at preventing acne and improving pore conspicuousness (Patent Documents 1 to 4).

JP 2000-169427 A Japanese Patent Laid-Open No. 2001-19629 JP 2001-19630 A JP 2004-203807 A

However, since the hydroxycarboxylate has poor solubility in water, there is a problem that it takes a long time to dissolve, and it is impossible to efficiently produce cosmetics and the like.
In Patent Documents 1 to 3, zinc hydroxycarboxylate is blended with ethanol and dissolved. However, for women with sensitive skin, it is desirable to reduce the ethanol content as much as possible, since some people feel irritation and smell about the use of cosmetics containing ethanol.
Moreover, in patent document 4, since the solubility to water is bad, zinc hydroxycarboxylate is mix | blended and disperse | distributed to an oil phase. However, such a method requires a sufficient oil phase in the cosmetic and limits the composition.
The present invention relates to a method for producing cosmetics in which zinc hydroxycarboxylate can be easily dissolved, the ethanol content is reduced, the amount of oil phase is not dependent, and the time is not spent.

  If the present inventors add zinc hydroxycarboxylate to a specific dihydric alcohol and the like and stir with heating, the hydroxycarboxylate zinc can be easily dissolved in a short time, and a cosmetic containing this can be easily prepared. We found that it can be manufactured.

The present invention includes the following components (A), (B) and (C):
(A) Zinc oxide or hydroxycarboxylic acid zinc salt surface-treated with hydroxycarboxylic acid 0.001 to 0.9% by mass,
(B) IOB 1.3-3.5 dihydric alcohol, tris (ethoxyethoxyethyl) phosphate and one or more selected from ethyl carbitol 0.5-30% by mass,
(C) Step 1 in which mixture 1 containing water and containing part or all of component (A) and component (B) is heated and mixed at 70 ° C. or higher, and the remaining components and mixture including component (C) The manufacturing method of cosmetics provided with the process 2 which mixes 1 with.

  According to the present invention, zinc hydroxycarboxylate can be easily dissolved, and it does not depend on the amount of the oil phase, the ethanol content is reduced, and the cosmetic containing zinc hydroxycarboxylate takes time. It can manufacture simply.

  Among the components (A) used in the present invention, in the zinc oxide surface-treated with hydroxycarboxylic acid, the hydroxycarboxylic acid includes α-hydroxy acids such as glycolic acid, lactic acid and tartaric acid; hydroxybenzoic acids such as salicylic acid; ricinoleic acid In addition to 10-hydroxydecenoic acid, etc., general formula (2)

(Wherein R ¹ represents an alkyl group having 1 to 8 carbon atoms substituted with 1 or 2 or more hydroxyl groups, and n represents 1 to 18, preferably 7 to 10), Examples thereof include hydroxycarboxylic acids having a total carbon number of 6 to 20, more preferably a total carbon number of 6 to 18.

  The hydroxycarboxylic acid represented by the general formula (2) is preferably a carboxylic acid having a hydroxyl group substituted at the terminal (ω position) or the sixth carbon atom from the terminal, such as 6-hydroxyhexanoic acid and 7-hydroxyoctane. Acid, 8-hydroxyoctanoic acid, 8-hydroxynonanoic acid, 9-hydroxynonanoic acid, 10-hydroxydecanoic acid, 10,11-dihydroxyundecanoic acid, 8-hydroxyundecanoic acid, 9-hydroxyundecanoic acid, 10-hydroxyundecane Acid, 10-hydroxy-10-methylundecanoic acid, 11-hydroxyundecanoic acid, 10-hydroxydodecanoic acid, 12-hydroxydodecanoic acid, 13-hydroxytridecanoic acid, 14-hydroxytetradecanoic acid, 12-hydroxystearic acid, etc. preferable.

  On the other hand, the surface-treated zinc oxide is not particularly limited as long as it is used for ordinary cosmetics, and can be used.

  Zinc oxide can be surface-treated with hydroxycarboxylic acid by a conventional method such as a wet method, a dry method, or a spray dry method. For example, in the case of a wet method, zinc oxide can be dispersed and mixed in a solution in which hydroxycarboxylic acid is dissolved in ethanol, and the precipitate can be recovered. The fact that zinc oxide is surface-treated with hydroxycarboxylic acid can be confirmed by an infrared absorption spectrum.

  The molar ratio of zinc oxide and hydroxycarboxylic acid to be used is preferably 2: 1 to 1: 5, and more preferably 2: 1 to 1: 2.

  Moreover, among the component (A), as the hydroxycarboxylic acid used in the hydroxycarboxylic acid zinc salt, one or two selected from the hydroxycarboxylic acids used in the zinc oxide surface-treated with the hydroxycarboxylic acid described above are used. As the hydroxycarboxylic acid zinc salt, those represented by the general formula (1) are preferable.

(Wherein p and q are numbers satisfying p = 0-2, q = 5-11 and p + q = 7-11)
Among these, there are fewer odors peculiar to hydroxycarboxylic acids, and in terms of enhancing the effect of suppressing sebum secretion, p = 0, q = 7-11, p = 1, q = 6-10, p = 2 And those with q = 5-9 are more preferred, those with p = 0 and q = 8, those with p = 1 and q = 7, and those with p = 2 and q = 6 are even more preferred.

  The hydroxycarboxylic acid zinc salt (1) can be obtained, for example, by reacting the corresponding hydroxycarboxylic acid and zinc oxide in the presence of water and collecting the precipitate. Moreover, when manufacturing cosmetics, corresponding hydroxycarboxylic acid and zinc oxide can be mix | blended simultaneously, and it can be made to react in a mixing tank, and it can also be set as hydroxycarboxylic acid zinc salt (1).

  As hydroxycarboxylic acid zinc salt (1), from the viewpoint of reducing smell and improving sebum secretion suppression effect, one or more of the following hydroxycarboxylic acid zinc salts (1a), (1b) and (1c) are blended: It is more preferable that (1a) :( 1b) :( 1c) = 60 to 95: 4 to 35: 1 to 10 (molar ratio, the same applies hereinafter), more preferably 70 to 85:10 to 25: 2. What was mix | blended by ~ 8 is still more preferable.

(In the formula, q1 = number of 7 to 11, q2 = number of 6 to 10, and q3 = number of 5 to 9)
When one or more hydroxycarboxylic acid zinc salts (1a), (1b) and (1c) are blended, these zinc salts may be obtained and blended separately, but from the viewpoint of production efficiency, What was obtained as a mixture in the process of manufacturing a zinc salt is preferably blended as it is.

  Component (A) is preferably a hydroxycarboxylic acid zinc salt obtained by reacting hydroxycarboxylic acid and zinc oxide from the viewpoint of availability, and 8-hydroxyundecanoic acid or 9-hydroxy from the point of low odor. 8-hydroxyundecanoic acid zinc salt, 9-hydroxyundecanoic acid zinc salt, 10-hydroxyundecanoic acid zinc salt, more preferably 10-hydroxyundecanoic acid zinc salt obtained by reacting undecanoic acid, 10-hydroxyundecanoic acid and zinc oxide Is more preferable.

  Component (A) can be used singly or in combination of two or more, and a sufficient sebum suppressing effect is obtained, and from the viewpoint of excellent stability, the content in the cosmetic is 0.001% by mass. 0.005 mass% or more is preferable, 0.01 mass% or more is more preferable, 0.9 mass% or less is preferable, 0.5 mass% or less is preferable, and 0.15 mass% or less is more preferable. . Moreover, content of a component (A) is 0.001-0.9 mass% in cosmetics, 0.005-0.5 mass% is preferable, and 0.01-0.15 mass% is more. preferable.

Component (B) is a dihydric alcohol, tris (ethoxyethoxyethyl) phosphate and ethyl having an IOB of 1.3 to 3.5, preferably 1.6 to 3.4, more preferably 1.8 to 2.6. It is 1 type, or 2 or more types chosen from carbitol. When it is within the range of this IOB, when heated and stirred with hydroxycarboxylic acid zinc salt at 70 ° C. or higher, the hydroxycarboxylic acid zinc salt is easily dispersed, and further, an aqueous phase is added to produce cosmetics. Further, precipitation of hydroxycarboxylic acid zinc salt can be prevented, and a stable cosmetic can be produced.
Here, the IOB value is an abbreviation for Inorganic / Organic Balance (inorganic / organic ratio), which corresponds to the ratio of the inorganic value of the compound to the organic value of the compound, and the degree of polarity of the organic compound It is an index showing.
In the present invention, calculation is performed using the following equation by Oda, Teramura et al. The inorganic value and the organic value are obtained based on an organic conceptual diagram (Akira Fujita, prediction of organic compounds and an organic conceptual diagram, chemistry area Vol. 11, No. 10 (1957) p. 719-725). .
IOB value = inorganic value / organic value

  Moreover, as a component (B), the thing of the molecular weight 70-1000 is preferable from the point of the solubility to water, 70-500 are more preferable, 75-200 are further more preferable.

Examples of the component (B) include 1,3-butylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, isoprene glycol, polyethylene glycol 400, polyethylene glycol 600, 1,2-pentanediol, 1, 2-hexanediol, tris (ethoxyethoxyethyl) phosphate, ethyl carbitol (diethylene glycol monoethyl ether), polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3B.O.) (8E.O.) (5P.O .) And the like.
Among these, from the viewpoint of stability, 1,3-butylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, and isoprene glycol are preferable. From the viewpoint of further increasing the solubility of the component (A), 1 , 3-butylene glycol, propylene glycol, 1,3-propanediol, and dipropylene glycol are more preferable.

  Component (B) can be used singly or in combination of two or more. From the viewpoint of excellent solubility of component (A), the content in the cosmetic is 0.5% by mass or more, and 1 It is preferably at least mass%, more preferably at least 1.5 mass%, at most 30 mass%, preferably at most 15 mass%, more preferably at most 10 mass%. Moreover, content of a component (B) is 0.5-30 mass% in cosmetics, 1-15 mass% is preferable, and 1.5-10 mass% is more preferable.

  In the present invention, the mass ratio (A) / (B) of the components (A) and (B) is preferably 0.0001 or more from the viewpoint of increasing the solubility of the component (A) in the component (B). 0.001 or more is more preferable, 0.01 or more is further preferable, 0.5 or less is preferable, 0.1 or less is more preferable, and 0.05 or less is more preferable. Further, the mass ratio (A) / (B) of the components (A) and (B) is preferably 0.0001 to 0.5, more preferably 0.001 to 0.1, and 0.01 to 0.05 is more preferable.

  In the present invention, the component (C) water constitutes the balance of each component, and the content is preferably 1% by mass or more, more preferably 5% by mass or more, still more preferably 40% by mass or more in the total composition, 99 .4% by mass or less is preferable, 99% by mass or less is more preferable, and 97% by mass or less is more preferable. Moreover, 1-99.4 mass% is preferable in the whole composition, as for content of a component (C), 5-99 mass% is more preferable, and 40-97 mass% is still more preferable.

  Cosmetics produced in the present invention, in addition to the above components, components used in ordinary cosmetics, such as oily components, nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, Ethanol, polymer, powder, moisturizer, bactericidal agent, anti-inflammatory agent, antiseptic, chelating agent, salt, pearlizing agent, fragrance, cooling agent, pigment, UV absorber, antioxidant, plant extract, etc. Can be contained.

Examples of the oil component used in the cosmetic of the present invention include ceramide, hydrocarbon oil, ester oil, silicone oil, etc., and ceramide is preferable from the viewpoint of moisturizing effect, and from the viewpoint of ease of spreading during application, 25 Silicone oil that is liquid at 0 ° C. is preferable, and linear silicone oil having a viscosity of 50 mPa · s or less is more preferable.
These oily components can be used alone or in combination of two or more, and the content can be contained by 0.1% by mass or more from the viewpoint of the moisturizing effect, and the point of refreshing touch at the time of application. Therefore, 15 mass% or less is preferable, 8 mass% or less is more preferable, and 4 mass% or less is further more preferable.

The nonionic surfactant used in the cosmetic of the present invention is preferably a hydrophilic nonionic surfactant having an HLB of 8 or more from the viewpoint of stability. Polyoxyethylene fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene is preferable. Examples thereof include ethylene hydrogenated castor oil and sorbitan fatty acid ester. From the viewpoint of stability, polyoxyethylene hydrogenated castor oil is preferable.
The nonionic surfactant can be used singly or in combination of two or more, and the content can be 0.1% by mass or more from the viewpoint of stability, and the mildness to the skin. From the viewpoint, 1% by mass or less is preferable, 0.5% by mass or less is more preferable, and 0.3% by mass or less is more preferable.

Examples of the anionic surfactant used in the cosmetic of the present invention include N-acyl taurine salts. From the viewpoint of stability, N-stearoyl-N-methyl taurine sodium is preferable.
The anionic surfactant can be used alone or in combination of two or more, and the content can be 0.1% by mass or more from the viewpoint of stability, and from the viewpoint of mildness to the skin. 2 mass% or less is preferable, 1 mass% or less is more preferable, 0.5 mass% is further more preferable, and 0.3 mass% or less is more preferable.

In the cosmetic, the total content of the cationic surfactant and the amphoteric surfactant is preferably 1% by mass or less, more preferably 0.5% by mass or less from the viewpoint of stability and mildness to the skin. 0.3 mass% or less is more preferable, and it is still more preferable not to mix | blend.
Further, in the cosmetic, the content of ethanol is preferably 4% by mass or less, more preferably 1% by mass or less, from the viewpoint of suppressing mildness to the skin and the odor that is a concern during use. More preferably, 5% by mass is more preferable.

Examples of the polymer used in the cosmetic of the present invention include xanthan gum, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methylcellulose, carboxyvinyl polymer, acrylic acid / alkyl methacrylate copolymer, and the like. From the viewpoint of easy application and stability, hydroxypropylmethylcellulose and acrylic acid / alkyl methacrylate copolymers are preferred.
The polymer can be used singly or in combination of two or more, and the content is preferably 0.01% by mass or more, more preferably 0.1% by mass or more in the cosmetic from the viewpoint of stability. In terms of ease of spreading at the time of application, it is preferably 1% by mass or less, more preferably 0.5% by mass or less, and further preferably 0.3% by mass or less.

In the present invention, first, the component (A) is added to all or part of the component (B), 70 ° C. or higher, preferably 80 ° C. or higher, more preferably 90 ° C. or higher, preferably 98 ° C. or lower, more preferably Dissolve by heating and stirring at 95 ° C. or lower. Here, dissolution is a state in which no aggregates or precipitates are observed with the naked eye. Specifically, after the mixed liquid of the component (A) and the component (B) is dispersed, it is made of glass within 1 minute. About 5 mL is transferred to a screw tube (manufactured by Maruemu, No. 4), the character is printed on the opposite side of the screw tube when the screw tube is stood and viewed from the side, and the character can be read through the screw tube. Thus, a component (A) can be efficiently mix | blended in cosmetics by heating and stirring.
The production method of the present invention comprises a step 1 in which a mixture 1 containing part or all of the component (A) and the component (B) is heated and mixed at 70 ° C., the remaining components including the component (C), and the mixture 1 And a step 2 for mixing cosmetics. In the present invention, Step 3 of heating and stirring the mixture 2 containing the remaining components including the component (C) other than part or all of the component (A) and the component (B) and then cooling to 30 ° C. or lower. After that, it is preferable to provide the process 4 which stirs, adding the mixture 1 containing a part or all of a component (A) and a component (B) to the mixture 2 after that. The mixture 2 may be an emulsion.
Moreover, the mixture 1 may contain 20 mass% or less of components other than a component (A) and a component (B) in the mixture 1, and 10 mass% or less is preferable, and it is further more preferable not to contain it.

The cosmetic obtained by the present invention preferably has a pH of 3 to 7, more preferably a pH of 3.5 to 6, and a pH of 4 to 5 in terms of enhancing the solubility of the component (A) and mild to the skin. .5 is more preferred. According to the literature, there are reports that the pH of the skin is 4.5 to 6.5 (Cosmetics & Toiletries magazine 2008, Val 123, 61-70.), And it is mild to the skin that the pH of the skin is not changed. Conceivable. For this reason, the cosmetic applied to the skin is preferably close to the skin pH, and more preferably does not change the skin pH when the cosmetic is applied.
In addition, pH measures a cosmetic stock solution using a pH meter (HORIBA, pH METER F-52).

The pH can be adjusted by an ordinary method using an inorganic acid, an organic acid, a polymer acid, a base, or the like.
Examples of inorganic acids include hydrochloric acid, phosphoric acid, sulfuric acid, sulfurous acid, and nitric acid, and examples of organic acids include citric acid, succinic acid, tartaric acid, acetic acid, malic acid, oxalic acid, lactic acid, boric acid, and adipic acid. Examples of the polymer acid include a polymer having a carboxyl group or a sulfo group, and examples of the base include arginine, sodium hydroxide, potassium hydroxide, triethanolamine, and aminomethylpropanol. The polymer acid may include a carboxyl group in the above-described polymer, and examples thereof include a carboxyvinyl polymer and an acrylic acid / alkyl methacrylate copolymer. Among these, citric acid, succinic acid, and L-arginine are preferable because of their gentleness on the skin.
Inorganic acids, organic acids, polymeric acids, and bases can be used alone or in combination of two or more, and the content is preferably 0.01 to 1% by mass in the total composition, 0.05 to 0.7 mass% is more preferable, and 0.08 to 0.4 mass% is further more preferable.

The cosmetic obtained by the present invention preferably has a transparent or translucent appearance.
Transparent or translucent means that about 5 mL of cosmetic is placed in a glass screw tube (MaruM, No. 4), and the screw tube is upright and seen from the side, and the printed text is placed on the opposite side of the screw tube. The state where the character can be read through the screw tube.

Examples of the cosmetic obtained by the present invention include skin lotion, cosmetic liquid, milky lotion, gel, pack agent, foundation, face wash, cleansing agent, and the like, and lotion and cosmetic liquid are more preferable.
This invention discloses the following compositions further regarding embodiment mentioned above.

<1> (A) zinc oxide or hydroxycarboxylic acid zinc salt surface-treated with hydroxycarboxylic acid 0.001 to 0.9% by mass,
(B) IOB 1.3-3.5 dihydric alcohol, tris (ethoxyethoxyethyl) phosphate and one or more selected from ethyl carbitol 0.5-30% by mass,
(C) A method for producing water-containing cosmetics, wherein Step 1 in which a mixture 1 containing part or all of the component (A) and the component (B) is heated and mixed at 70 ° C. or higher and the component (C ), And a process 2 for mixing the mixture 1 with the remaining ingredients.

<2> After heating and stirring the mixture 2 containing the remaining components other than the components (A) and (B), the mixture 2 is provided with a step 3 of cooling to 30 ° C. or lower, and the mixture 2 is then mixed with the components (A) and ( The method for producing a cosmetic according to <1>, preferably comprising the step 4 of stirring while adding the mixture 1 containing part or all of B).
<3> The method for producing a cosmetic according to <2>, wherein the mixture 2 is an emulsion.
<4> Mixture 1 may contain 20% by mass or less of component (A) and component (B) other than component (B), preferably 10% by mass or less, and more preferably not contain <1> to <1> to The manufacturing method of cosmetics any one of <3>.

<5> Among the components (A) of cosmetics, in the zinc oxide surface-treated with hydroxycarboxylic acid, the hydroxycarboxylic acid is preferably glycolic acid, lactic acid, tartaric acid, salicylic acid, ricinoleic acid, or 10-hydroxydecenoic acid. The manufacturing method of cosmetics any one of 1>-<4>.
<6> Among the cosmetics (A), in the zinc oxide surface-treated with hydroxycarboxylic acid, the hydroxycarboxylic acid has the general formula (2)

(Wherein R ¹ represents an alkyl group having 1 to 8 carbon atoms substituted with 1 or 2 or more hydroxyl groups, and n represents 1 to 18, preferably 7 to 10). The method for producing a cosmetic according to any one of <1> to <4>, which is preferably a hydroxycarboxylic acid having a total carbon number of 6 to 20, more preferably a total carbon number of 6 to 18.

<7> The hydroxycarboxylic acid represented by the general formula (2) is preferably a carboxylic acid having a hydroxyl group substituted at the terminal (ω position) or the sixth carbon atom from the terminal, such as 6-hydroxyhexanoic acid, 7- Hydroxyoctanoic acid, 8-hydroxyoctanoic acid, 8-hydroxynonanoic acid, 9-hydroxynonanoic acid, 10-hydroxydecanoic acid, 10,11-dihydroxyundecanoic acid, 8-hydroxyundecanoic acid, 9-hydroxyundecanoic acid, 10- Hydroxyundecanoic acid, 10-hydroxy-10-methylundecanoic acid, 11-hydroxyundecanoic acid, 10-hydroxydodecanoic acid, 12-hydroxydodecanoic acid, 13-hydroxytridecanoic acid, 14-hydroxytetradecanoic acid, 12-hydroxystearic acid <6> is more preferable Manufacturing method of the mounting of the cosmetic.
<8> Among the components (A) of cosmetics, in the zinc oxide surface-treated with hydroxycarboxylic acid, the ratio of zinc oxide and hydroxycarboxylic acid to be used is preferably 2: 1 to 1: 5 in molar ratio. The method for producing a cosmetic according to any one of <1> to <7>, more preferably 2: 1 to 1: 2.

<9> Among the component (A) of the cosmetic, the hydroxycarboxylic acid used in the hydroxycarboxylic acid zinc salt is a carboxylic acid having a hydroxyl group substituted on the terminal (ω position) or the sixth carbon atom from the terminal. 6-hydroxyhexanoic acid, 7-hydroxyoctanoic acid, 8-hydroxyoctanoic acid, 8-hydroxynonanoic acid, 9-hydroxynonanoic acid, 10-hydroxydecanoic acid, 10,11-dihydroxyundecanoic acid, 8-hydroxyundecane Acid, 9-hydroxyundecanoic acid, 10-hydroxyundecanoic acid, 10-hydroxy-10-methylundecanoic acid, 11-hydroxyundecanoic acid, 10-hydroxydodecanoic acid, 12-hydroxydodecanoic acid, 13-hydroxytridecanoic acid, 14 -Hydroxytetradecanoic acid, 12-hydro More preferably wherein the Shisutearin acid <1> to <4> cosmetic method of manufacturing as claimed in any one of.
<10> Of the component (A) of the cosmetic, the hydroxycarboxylic acid zinc salt is represented by the general formula (1).

(Wherein p and q are numbers satisfying p = 0 to 2, q = 5 to 11 and p + q = 7 to 11), preferably p = 0 and q = 7 to 11 P = 1 and q = 6-10, p = 2 and q = 5-9 are preferred, p = 0 and q = 8, p = 1 and q = 7, and p = The method for producing a cosmetic according to any one of <1> to <4>, wherein 2 and q = 6 are more preferable.
<11> Among the components (A) of the cosmetic, as the hydroxycarboxylic acid zinc salt (1), the hydroxycarboxylic acid zinc salt (1a), (1b) and (1c)

(Wherein q1 = number of 7-11, q2 = number of 6-10, q3 = number of 5-9)
Are preferably blended in the form of 1 or more, more preferably (1a) :( 1b) :( 1c) = 60 to 95: 4 to 35: 1 to 10 (molar ratio), more preferably 70 to 85. : The manufacturing method of cosmetics as described in said <10> with what was further mix | blended by 10-25: 2-8 (molar ratio).
<12> In cosmetics, as component (A), hydroxycarboxylic acid zinc salt obtained by reacting hydroxycarboxylic acid and zinc oxide is preferable, 8-hydroxyundecanoic acid, 9-hydroxyundecanoic acid, 10-hydroxyundecanoic acid. 8-hydroxyundecanoic acid zinc salt, 9-hydroxyundecanoic acid zinc salt, 10-hydroxyundecanoic acid zinc salt are more preferable, and 10-hydroxyundecanoic acid zinc salt is more preferable. <1> to The method for producing a cosmetic according to any one of <4>.

<13> In the cosmetic, the content of the component (A) is preferably 0.001% by mass or more, more preferably 0.005% by mass or more, further preferably 0.01% by mass or more, and 0.9% by mass. The content is preferably 0.5% by mass or less, more preferably 0.15% by mass or less, and the content of the component (A) is preferably 0.001 to 0.9% by mass in the cosmetic. 005-0.5 mass% is more preferable, 0.01-0.15 mass% is still more preferable The manufacturing method of cosmetics any one of said <1>-<12>.
<14> The cosmetic according to any one of <1> to <13>, wherein the component (B) is preferably IOB 1.6 to 3.4, more preferably IOB 1.8 to 2.6. Production method.
<15> The cosmetic composition according to any one of <1> to <14>, wherein the component (B) preferably has a molecular weight of 70 to 1,000, more preferably 70 to 500, and still more preferably 75 to 200. Manufacturing method.

<16> In the cosmetic, component (B) is 1,3-butylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, isoprene glycol, polyethylene glycol 400, polyethylene glycol 600, 1,2-pentane. Diol, 1,2-hexanediol, tris (ethoxyethoxyethyl) phosphate, ethyl carbitol (diethylene glycol monoethyl ether), polyoxybutylene polyoxyethylene polyoxypropylene glyceryl ether (3B.O.) (8E.O.) The method for producing a cosmetic according to any one of <1> to <15>, wherein (5P.O.) is preferred.
<17> In the cosmetic, the content of the component (B) is preferably 0.5% by mass or more, more preferably 1% by mass or more, further preferably 1.5% by mass or more, and preferably 30% by mass or less. 15 mass% or less is more preferable, 10 mass% or less is more preferable, 0.5-30 mass% is preferable in cosmetics, and, as for content of a component (B), 1-15 mass% is more preferable, 1.5 The manufacturing method of cosmetics any one of said <1>-<16> still more preferable-10 mass%.

<18> In the cosmetic, the mass ratio of the components (A) and (B) is preferably (A) / (B) = 0.0001 to 0.5, more preferably 0.001 to 0.1, and 0. The method for producing a cosmetic according to any one of <1> to <17>, wherein 0.01 to 0.05 is more preferable.
<19> In the cosmetic, the content of the component (C) water is preferably 1% by mass or more, more preferably 5% by mass or more, further preferably 40% by mass or more, and preferably 99.4% by mass or less. The method for producing a cosmetic according to any one of <1> to <18>, wherein the content is more preferably not more than mass%, and still more preferably not more than 97 mass%.
<20> Component (A), all or part of component (B), 70 ° C. or higher, preferably 80 ° C. or higher, more preferably 90 ° C. or higher, preferably 98 ° C. or lower, more preferably 95 ° C. or lower The method for producing a cosmetic according to any one of <1> to <19>, wherein the cosmetic is dissolved by heating and stirring.
<21> The cosmetic preparation method according to <1> to <20>, wherein the pH is preferably 3 to 7, more preferably pH 3.5 to 6, and still more preferably pH 4 to 5.5.

Examples 1-13, Comparative Examples 1-4
Cosmetics having the compositions shown in Tables 1 to 3 were produced, pH was measured, and solubility was evaluated. Moreover, about Example 1 and 13, the change of pH of the skin before cosmetics application and pH after application | coating was evaluated. The results are also shown in Tables 1 to 3.

(Production method)
The components (A) and (B) were heated and stirred at 90 ° C., then added to the room temperature aqueous phase containing the water of the component (C), and further stirred for 10 minutes to obtain a cosmetic. In addition, when not heating of the comparative example 1, after stirring at room temperature without heating a component (A) and a component (B), it added to the aqueous phase at room temperature, and stirred for 10 minutes.

(Evaluation method)
(1) pH measurement:
The stock solution of the obtained cosmetic was measured at 25 ° C. using a pH meter (HORIBA, pH METER F-52, electrode; standard ToupH electrode 9615-10D).

(2) Solubility (solubility of components (A) and (B)):
Ingredients (A) and (B) are weighed in a screw tube (No. 4) manufactured by MaruM to a total volume of about 5 mL and stirred with a magnetic stirrer (ADVANTEC magnetic stirrer SR-500). The mixture was heated at 90 ° C. Thereafter, the appearance of the obtained mixed liquid was visually observed and evaluated according to the following criteria. The dissolved state is a state in which no aggregates or precipitates are observed with the naked eye, and stands for a screw tube containing a mixed solution and puts printed characters on the opposite side and reads the characters through the screw tube. .
○: Dissolved uniformly.
X: Agglomerates are present or separated.

(3) Solubility (Solubility of Component (A) in Cosmetics):
The appearance of the obtained cosmetic was left to stand at room temperature for 1 hour, then visually observed, and evaluated according to the following criteria. The dissolved state is the same as described in (2).
○: Dissolved uniformly.
X: There exists an aggregate. Or they are separated.

(4) Skin pH before cosmetic application and change in pH after application (absolute value):
Using a pH meter (HORIBA, pH METER F-52, electrode; flat pH composite electrode 6261-10C), the pH of the skin inside the arm is measured (pH-a). Next, about 0.1 g of cosmetic is applied to the skin area where the pH is measured. Thereafter, after 3 minutes, the pH of the skin is measured (pH-b). The pH change ΔpH is calculated from pH-a and pH-b. The smaller the ΔpH, the milder the skin because the pH change is smaller.

Example 14 (skin lotion)
A lotion having the composition shown in Table 4 was produced.

(Production method)
Components (3) to (12) and (15) are dissolved by heating and mixing at 80 ° C., and cooled to room temperature to prepare an aqueous phase. Ingredients (1) and (2) are slowly added to the aqueous phase with heating and stirring at 90 ° C. Furthermore, components (13) and (14) were added and stirred to obtain a skin lotion.

Example 15 (Cosmetic liquid)
A cosmetic liquid having the composition shown in Table 5 was produced.

(Production method)
Components (3) to (5) are mixed by heating and dissolved, and then a part of components (6), (7) and (17) previously heated and dissolved is added and cooled to room temperature. The components (8) to (11) uniformly mixed are added thereto, and the component (12) dissolved in advance in a part of the component (17) is added and stirred. Ingredients (1) and (2) are slowly added with heating and stirring at 90 ° C. Components (13) to (16) were added and stirred to obtain a serum.

  In each of Examples 14 and 15, the hydroxycarboxylate zinc was easily dissolved, and the cosmetics could be produced without taking time.

Claims (5)

The following components (A), (B) and (C):
(A) Zinc oxide or hydroxycarboxylic acid zinc salt surface-treated with hydroxycarboxylic acid 0.001 to 0.9% by mass,
(B) IOB 1.3-3.5 dihydric alcohol, tris (ethoxyethoxyethyl) phosphate and one or more selected from ethyl carbitol 0.5-30% by mass,
(C) Water 40-99.4 mass%
Containing a 0 to 15% by weight content of the oily component, and the content of ethanol is a process for the preparation of 0-4% by mass Ru cosmetic, components (A) and (B) some or containing the whole and components (a) and the step 1 the content of components other than (B) is heated mixture is mixed 1 Ru 0-20% by mass at 70 ° C. or higher, component (C) A process for producing a cosmetic comprising the step 2 of mixing the remaining component and the mixture 1.   The method for producing a cosmetic according to claim 1, wherein the cosmetic has a pH of 3 to 7. Component (A) is represented by the general formula (1)
(Wherein p and q are numbers satisfying p = 0-2, q = 5-11 and p + q = 7-11)
The method for producing a cosmetic according to claim 1, wherein the hydroxycarboxylic acid zinc salt is represented by the formula:   The cosmetics production according to any one of claims 1 to 3, wherein the mass proportion of the components (A) and (B) in the cosmetic is (A) / (B) = 0.0001 to 0.5. Method. The method for producing a cosmetic according to any one of claims 1 to 4 , wherein the appearance of the cosmetic is transparent or translucent.