TWI808204B - spray cosmetics - Google Patents

Abstract

The spray-type cosmetic of the present invention contains a stock solution and (F) carbon dioxide gas; the stock solution contains the following components: (A), (B), (C), (D) and (E): (A) dimethylpolysiloxane with a viscosity of 6-5000 mPa‧s at 25°C; (B) polyethylene glycol with a molecular weight of 300-15000; (C) a water-soluble thickener; ) water; and the content of component (A) is 0.1-20% by mass, the mass ratio (A)/(B) of component (A) to component (B) is 0.1-20, and the viscosity at 25°C is 500-20000mPa‧s.

Description

spray cosmetics

The present invention relates to spray cosmetics.

Skin problems such as panda eyes and dullness are caused by poor blood circulation, so in order to improve these problems, cosmetics that utilize the effect of carbon dioxide gas have been examined. For example, Patent Document 1 records: a spray-type cosmetic containing polyglycerin fatty acid esters, sugars, polysiloxane oil, and carbon dioxide gas maintains a foam state even during massage and rubbing, and is not sticky after rinsing. Also, Patent Document 2 describes that a spray-type cosmetic containing two specific surfactants, acrylic polymers, polyols, and carbon dioxide gas can generate a large number of fine air bubbles and improve the feeling of stickiness.

(Patent Document 1) Japanese Patent Laid-Open No. 2011-93877

(Patent Document 2) Japanese Patent Laid-Open No. 2016-17052

The spray-type cosmetic of the present invention contains a stock solution and (F) carbon dioxide gas; the stock solution contains the following components: (A), (B), (C), (D) and (E): (A) dimethyl polysiloxane with a viscosity of 6-5000 mPa‧s at 25°C; (B) polyethylene glycol with a molecular weight of 300-15000; (C) a water-soluble thickener; water; and the content of component (A) is 0.1-20% by mass, the mass ratio (A)/(B) of component (A) to component (B) is 0.1-20, and the viscosity at 25°C is 500-20000mPa‧s.

Fig. 1 is a diagram showing a method for measuring the volatilization rate of carbon dioxide gas and the volatilization amount of carbon dioxide gas in Examples.

The conventional spray-type cosmetics containing carbonic acid gas described in Patent Document 1 and Patent Document 2 still have room for improvement from the perspective of suppressing the volatilization of carbonic acid gas, as well as the stickiness of the skin after application and the use feeling when the foam spouted from the container penetrates into the pores.

The present inventors found that by combining specific dimethylpolysiloxane and polyethylene glycol in a specific ratio, and using a water-soluble thickener, a specific surfactant, and carbon dioxide gas, a spray cosmetic that can solve the above-mentioned problems can be obtained.

When the spray cosmetic of the present invention penetrates the foam (foam) discharged from the container into the pores, it can suppress the volatilization of carbon dioxide gas (carbon dioxide) and allow a sufficient amount of carbon dioxide gas to act on the skin. In addition, the skin after application is not sticky and has excellent feeling of use such as smoothness and softness.

Component (A) used in the present invention is a dimethyl polysiloxane with a viscosity of 6 mPa‧s to 5000 mPa‧s at 25°C, preferably 10 mPa‧s or more from the viewpoint of suppressing the volatilization of carbon dioxide gas and improving skin permeability. Also, from the viewpoint of imparting a non-sticky feeling, smoothness, and softness after application, it is preferably 1000 mPa‧s or less, more preferably 500 mPa‧s or less. Also, from the standpoint of balancing the suppression of carbon dioxide volatilization, suppression of stickiness after application, smoothness, and softness, it is preferably 10 mPa‧s~1000 mPa‧s, more preferably 10 mPa‧s~500 mPa‧s.

Here, the viscosity is measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) with a spindle No. 3, 12 rpm, and 1 minute. When the viscosity exceeds 10,000 mPa‧s, the value measured with a spindle No. 3, 6 rpm, and 1 minute is used.

The content of component (A) is at least 0.1% by mass, preferably at least 0.5% by mass, more preferably at least 1% by mass, in the stock solution from the viewpoint of suppressing evaporation of carbon dioxide gas and suppressing stickiness after application. Also, from the viewpoint of suppressing stickiness after application and imparting smoothness and softness, it is preferably at most 20% by mass, more preferably at most 15% by mass, and most preferably at most 7% by mass. In addition, the content of component (A) accounts for 0.1-20% by mass, preferably 0.5-15% by mass, and more preferably 1-7% by mass in the stock solution from the viewpoint of suppressing evaporation of carbon dioxide gas, suppressing stickiness after application, imparting a smooth feeling, and balancing softness.

In addition, in this invention, two or more types of dimethylpolysiloxane of a component (A) can also be used, and in this case, what is necessary is just that the viscosity at the time of mixing exists in the said range. When blending two or more kinds of dimethylpolysiloxane, it is preferable to contain dimethylpolysiloxane of less than 30mPa‧s and dimethylpolysiloxane of 30mPa‧s or more in a mass ratio of 1:0.1~1:10.

Furthermore, when two or more kinds of dimethylpolysiloxanes are blended, from the viewpoint of suppressing carbon dioxide gas volatilization and usability, the amount of dimethylpolysiloxanes of 100 mPa‧s or more in component (A) is preferably 3% by mass or less, more preferably 1% by mass or less.

The polyethylene glycol of component (B) has an average molecular weight of 300-15,000. From the perspective of balancing the suppression of carbon dioxide gas volatilization, the suppression of stickiness after application, and the smoothness and softness, the average molecular weight is preferably 300-10,000, and more preferably 500-5,000.

Component (B) can be used alone or in combination of two or more, and its content is preferably at least 0.1% by mass, more preferably at least 0.3% by mass, and at least 0.5% by mass in the stock solution from the standpoint of suppressing stickiness after application and imparting a balanced softness. Also, the content of component (B) is preferably 0.1 to 10% by mass, more preferably 0.3 to 8% by mass, and most preferably 0.5 to 5% by mass in the stock solution from the viewpoint of balancing the suppression of carbon dioxide gas volatilization, suppression of stickiness after application, and imparting smoothness and softness.

Furthermore, in the present invention, the mass ratio (A)/(B) of component (A) relative to component (B) is 0.1-20, and from the viewpoint of balancing the suppression of carbon dioxide volatilization, suppression of stickiness after application, smoothness and softness, it is preferably 0.5-15, and more preferably 0.8-5.

The water-soluble thickener of component (C) can be used as long as it is commonly used in cosmetics, for example: carrageenan, dextrin, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, polyvinyl alcohol, polyacrylic acid, polymethacrylic acid, carboxyvinyl polymer, (acrylic acid/acrylic acid alkyl (C10-30) ester) copolymer, sanxian gum, carboxymethyl chitin, chitosan, etc. Among them, from the viewpoint of suppressing the volatilization of carbon dioxide gas, the stability of the stock solution, and the feeling of use during and after application (no sticky feeling, imparting smoothness and softness), acrylic polymers are preferred, carboxyvinyl polymers, acrylic acid/alkyl acrylate copolymers are more preferred, and (acrylic acid/alkyl acrylate (C10-30) ester) copolymers are particularly preferred.

Here, "(acrylic acid/alkyl (C10-30) acrylate) copolymer" refers to a copolymer of C10-30 alkyl acrylic acid and acrylic acid, methacrylic acid or such lower alkyl esters, cross-linked by using allyl ether of sucrose or allyl ether of pentaerythritol, for example: PEMULEN TR-1, PEMULEN TR-2, CARBOPOL ETD2020, CARBOPOL 1342, CARBOPOL Commercial items such as 1382 (all of the above are from Lubrizol Advanced Materials).

Furthermore, for example: acid-type water-soluble tackifiers such as polyacrylic acid, carboxyvinyl polymer, (acrylic acid/acrylic acid alkyl (C10-30) ester) copolymer, preferably use alkali metal hydroxides such as potassium hydroxide and sodium hydroxide as neutralizers, and use them after forming water-soluble or water-dispersible salts.

Component (C) can be used alone or in combination of two or more. From the standpoint of improving the non-sticky feeling during application and the stability of the stock solution, its content is preferably at least 0.05% by mass, more preferably at least 0.1% by mass, and at least 0.2% by mass in the stock solution. It is also preferably at most 1% by mass, more preferably at most 0.8% by mass, and at most 0.7% by mass. Also, the content of the component (C) in the stock solution is preferably 0.05 to 1% by mass, more preferably 0.1 to 0.8% by mass, and most preferably 0.2 to 0.7% by mass.

The component (D) nonionic surfactant used in the present invention is HLB12-18, preferably HLB13-15.

Here, HLB [hydrophilic-lipophilic balance (Hydrophilic-Lipophilic Balance)] refers to the molecular weight of the hydrophilic group in the total molecular weight of the surfactant, and the related non-ionic surfactant is calculated using the Griffin formula.

The HLB of a mixed surfactant composed of two or more types of nonionic surfactants is obtained as follows. The HLB of the mixed surfactant is averaged by adding the blending ratio to the HLB value of each nonionic surfactant.

Hybrid HLB=Σ(HLBx×Wx)/ΣWx

The HLBx system represents the HLB value of the nonionic surfactant X.

Wx represents the mass (g) of the nonionic surfactant X having the HLBx value.

Examples of the nonionic surfactant of component (D) include: polyglycerin fatty acid ester, polyethylene glycol fatty acid ester, sucrose fatty acid ester, polyoxyethylene fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene glycerin fatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene castor oil, polyoxyethylene hardened castor oil, polyoxyethylene hardened castor oil fatty acid ester, polyoxyethylene stanol ether, polyoxyethylene phytosterol ether , polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, polyoxyalkylene-modified organopolysiloxane, polyoxyalkylene-alkyl co-modified organopolysiloxane, etc., and one or more of these can be used.

Among them, polyoxyethylene alkyl ethers and polyoxyethylene hardened castor oil are preferred from the viewpoint of foaming properties when carbon dioxide gas is discharged.

Component (D) can be used alone or in combination of two or more, and its content in the stock solution is preferably at least 0.05% by mass, more preferably at least 0.1% by mass, and at least 0.2% by mass in the stock solution, and is preferably at most 16% by mass, more preferably at most 4% by mass, and at least 2% by mass in the stock solution from the viewpoint of non-sticky feeling when applied and stability of the stock solution. Also, the content of the component (D) is preferably 0.05 to 16% by mass, more preferably 0.1 to 4% by mass, and most preferably 0.2 to 2% by mass in the stock solution.

The water of the component (E) used in the present invention has the effect of the stock solution solvent and becomes the remainder of other components. The water content of component (E) is preferably at least 55% by mass, more preferably at least 65% by mass, and at least 70% by mass in the original solution from the standpoint of non-sticky feeling when applied, imparting smoothness and softness, and emulsification stability of the original solution. More preferably, it is at least 99% by mass, more preferably at most 95% by mass, and at most 90% by mass. Moreover, the content of water in the stock solution is preferably 55 to 99% by mass, more preferably 65 to 95% by mass, and most preferably 70 to 90% by mass.

The spray-type cosmetic of the present invention further increases the concentration of carbon dioxide gas in the stock solution to allow the carbon dioxide gas to act on the skin. The stock solution may contain component (G), which is an oil agent other than component (A) commonly used in cosmetics.

Among the oil agents of component (G), the liquid substances at 25°C can be exemplified as: paraffin, squalane, squalene and other hydrocarbons; bitter tea oil, jojoba oil, olive oil, macadamia ternifolia seed oil (Macadamia ternifolia seed oil), avocado oil, olive oil and other natural animal and vegetable oils mainly composed of triglycerides; glycerin monostearate, glycerin distearate, glycerin monooleate, isopropyl palmitate, isopropyl stearate Butyl Stearate, Isopropyl Myristate, Diethyl Phthalate, Myristyl Lactate, Cetyl Myristate, Cetyl Lactate, Cetyl 2-Ethylhexanoate, 2-Ethylhexyl Palmitate, 2-Octyldodecyl Myristate, 2-Octyldodecyl Oleate, Glyceryl Triisostearate, Glyceryl Di-p-Methoxycinnamate Mono-2-ethylhexanoate, Isotridecyl Isononanoate, Glyceryl monoisostearate monomyristate, alkyl benzoate (alkyl group with 12~15 carbons) and other monoester oils; diisopropyl adipate, diisobutyl adipate, neopentyl glycol dicaprate, tri(caprylic/capric) glyceride, tricapric glyceride, di-2-ethylhexanoic acid neopentyl glycol, di(caprylic/capric) propylene glycol, 1-isostearyl-3-myristyl glycerol , diisostearyl malate, N-lauroyl-L-glutamic acid di(cholesteryl ester‧octyldodecyl ester) and other diester oils; alkyl-1,3-dimethyl butyl ether, dioctyl ether, dioctyl ether and other ether oils; essential oils such as eucalyptus oil and peppermint oil, etc.

Among these, monoester oil and diester oil are preferable, and isotridecyl isononanoate and alkyl benzoate are more preferable from the viewpoint of increasing the concentration of carbon dioxide gas and imparting a smooth feeling of use.

Furthermore, oils other than liquid at 25°C can be, for example, waxes, pastes, solid fats, higher alcohols with 12 to 24 carbons, higher fatty acids with 12 to 24 carbons, paraffin, etc. that are solid at 25°C.

Component (G) can be used alone or in combination of two or more, and its content is preferably 0.1 to 15% by mass, more preferably 0.5 to 10% by mass in the stock solution from the viewpoint of foam hardness, foam ductility, and enhancement of the effect by carbon dioxide gas.

Furthermore, the total amount of the oil agents [component (A) and component (G)] in the stock solution is preferably 0.1 to 20% by mass, more preferably 1 to 15% by mass, from the viewpoints of carbon dioxide gas solubility, extensibility to the skin, and feeling of use.

The spray cosmetic of the present invention may further contain a surfactant other than component (D) in the stock solution from the viewpoint of improving the solubility of carbon dioxide gas in the stock solution, emulsification stability, and generating more bubbles. Surfactants other than the component (D) include, for example, nonionic surfactants, anionic surfactants, and amphoteric surfactants whose HLB is less than 12.

Examples of nonionic surfactants with an HLB of less than 12 include: sorbitan fatty acid esters with 8 to 22 carbon atoms; alkyl glyceryl ethers such as isostearyl glyceryl ether; polyoxyalkylene modified polysiloxane, etc.

Sorbitan fatty acid esters can be exemplified, such as: sorbitan monopalmitate, sorbitan monostearate, sorbitan monooleate, sorbitan sesquioleate, sorbitan coconut oil fatty acid ester, sorbitan tristearate, etc.; in terms of commercially available products, sorbitan monopalmitate can use RHEODOL SP-P10 (HLB, 6.7), and sorbitan monostearate can use RHEODOL SP-S10V (HLB4.7), sorbitan monooleate can use RHEODOL SP-O10V (HLB4.3), sorbitan sesquioleate can use RHEODOL AO-15V (HLB3.7), sorbitan coconut oil fatty acid ester can use RHEODOL SP-L10 (HLB8.6), sorbitan tristearate SP-S30V (HLB2.1) (all above are manufactured by Kao Corporation) etc. can be used.

Polyoxyalkylene-modified silicones can be exemplified, such as: polyoxyethylene‧methylpolysiloxane copolymer, poly(oxyethylene‧propylene)‧methylpolysiloxane copolymer, etc., and "KF-6015" (PEG-3 silicone) (HLB4.5) and "KF-6019" (PEG-9 silicone) (HLB4.5) sold by Shin-Etsu Chemical Co., Ltd. can also be used; Toray‧Dow Cor Commercial products such as "SH-3775M" (PEG-12 silicone) (HLB5) and "SH-3773M" (PEG-12 silicone) (HLB8) sold by Ning Silicone Co., Ltd.

When using the nonionic surfactant whose HLB is less than 12, the content in the stock solution is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.7% by mass.

Anionic surfactants can be exemplified, such as: sodium lauryl sulfate, potassium lauryl sulfate and other alkyl sulfates with 12 to 22 carbons or their salts; polyoxyethylene lauryl ether phosphate and other polyoxyethylene alkyl ether phosphoric acid with 12 to 22 carbons or its salts; dialkyl sulfosuccinic acid with 12 to 24 carbons or its salts; salt etc. Among these, polyoxyethylene alkyl ether phosphoric acid or a salt thereof, and acyl glutamic acid or a salt thereof are preferable from the standpoint of emulsification stability and generation of many bubbles during discharge.

When the anionic surface activity is contained, the content in the stock solution is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.7% by mass.

The total content of the total surfactants containing component (D) is preferably 0.1 to 10% by mass, more preferably 0.2 to 8% by mass, and most preferably 0.3 to 5% by mass in the stock solution from the viewpoint of carbon dioxide gas solubility, usability, and stability.

Furthermore, the spray-type cosmetic of the present invention may further contain dihydric or trihydric alcohols other than component (B) in the stock solution from the viewpoint of suppressing the volatilization of carbon dioxide gas and the feeling after application.

Preferred dihydric alcohols are, for example, propylene glycol, propylene glycol, 1,3-butanediol, 1,3-propanediol, dipropylene glycol, more preferably, 1,3-propylene glycol, dipropylene glycol, etc. Trihydric alcohols can be exemplified by, for example, glycerin, diglycerin, polyglycerin, and the like.

The content of dihydric or trihydric alcohols other than component (B) is preferably 1 to 20% by mass, more preferably 2 to 15% by mass, and most preferably 2 to 10% by mass in the stock solution.

In the spray cosmetic of the present invention, the stock solution may further contain ingredients commonly used in cosmetics, such as alcohol, preservatives, antioxidants, pigments, pH regulators, fragrances, ultraviolet absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, bactericides, whitening agents, anti-inflammatory agents, skin activators, etc.

The stock solution of the spray cosmetic of the present invention is prepared by mixing the above-mentioned components (A)-(E) and other components. From the point of view of the emulsification stability of the stock solution and foam discharge, the viscosity at 25°C is 500~20000mPa‧s, more preferably 1000~10000mPa‧s, more preferably 1500~7000mPa‧s.

Here, the viscosity is the value measured by using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) with rotor No. 3, 12 rpm, and 1 minute. If the viscosity exceeds 10,000 mPa‧s, use the value measured with rotor No. 3, 6 rpm, and 1 minute.

The spray-type cosmetic of the present invention can be produced by filling the above-mentioned stock solution and (F) carbon dioxide gas in a pressure-resistant container. The spray form is preferably in the form of a foam discharged in a foamy form.

The mass ratio of stock solution to carbonic acid gas is preferably 94:6~99.5:0.5, more preferably 95:5~99:1, and particularly preferably 96.5:3.5~98.5:1.5 from the viewpoint of the solubility of carbonic acid gas in the stock solution and the generation of foam.

In addition to the carbon dioxide gas of the component (F), the spray cosmetics of the present invention may also contain propellants commonly used in spray cosmetics. The propellant system can be exemplified by, for example, liquefied petroleum gas, compressed gas, and the like. When a propellant other than carbon dioxide gas is contained, the content of carbon dioxide gas is preferably at least 90% by mass, more preferably at least 95% by mass, and most preferably at least 98% by mass, based on the total amount of carbon dioxide gas and propellant.

The use of the spray cosmetics of the present invention is not particularly limited, but because the carbon dioxide gas can be absorbed through the skin, it can obtain a better effect of promoting blood circulation than conventional ones, so it is quite suitable for skin cosmetics for improving skin tone (brightness, dullness, etc.), improving moisturizing feeling, etc.

After the spray-type cosmetic material of the present invention is applied to the skin and left for a certain period of time, the smear agent containing air bubbles will form a coating film state, so the effect of promoting blood circulation can be improved. Also, it can penetrate together with active ingredients in cosmetics, and it is considered that it will be very effective.

The spray cosmetic of the present invention is applied to the skin and left for a certain period of time to allow it to penetrate deep into the pores, and then wipe or rinse, etc., according to the usage conditions.

The spray cosmetic of the present invention can be manufactured by a common method, for example, through the following steps 1 to 4:

Step 1: Mix ingredients (C), (E) and alkali ingredients until uniform.

(In this step 1, it is preferred to heat to above 50°C)

Step 2: Add ingredients (A), (B), (D) and other ingredients as needed to the liquid obtained in Step 1, and stir until uniform.

Step 3: Cool the liquid obtained in Step 2 to 15~30°C.

Step 4: Fill the liquid obtained in Step 3 (also called "stock solution") into a pressure-resistant container, seal it, and fill it with the ingredient (F) by pressurizing.

Regarding the above-mentioned embodiments, the present invention further discloses the following compositions.

<1> A spray-type cosmetic, which contains stock solution and (F) carbon dioxide gas; the stock solution contains ingredients: (A), (B), (C), (D) and (E): (A) dimethylpolysiloxane with a viscosity of 6-5000mPa‧s at 25°C; (B) polyethylene glycol with a molecular weight of 300-15000; (C) a water-soluble thickener; (D) a non-ionic surfactant of HLB12-18; ) water; and the content of component (A) is 0.1-20% by mass, the mass ratio (A)/(B) of component (A) to component (B) is 0.1-20, and the viscosity at 25°C is 500-20000mPa‧s.

<2> The spray-type cosmetic as described in the above <1>, wherein the viscosity of component (A) at 25°C is preferably not less than 10 mPa‧s, preferably not more than 1000 mPa‧s, more preferably not more than 500 mPa‧s.

<3> The spray-type cosmetic as described in the above <1> or <2>, wherein the content of component (A) in the stock solution is preferably at least 0.5% by mass, more preferably at least 1% by mass, and is preferably at most 15% by mass, more preferably at most 7% by mass.

<4> The spray cosmetic according to any one of <1> to <3> above, wherein when component (A) is blended with two or more dimethylpolysiloxanes, it is preferable to contain dimethylpolysiloxane of less than 30 mPa‧s and dimethylpolysiloxane of 30 mPa‧s or more in a mass ratio of 1:0.1 to 1:10.

<5> The spray-type cosmetic according to any one of <1> to <4> above, wherein, when component (A) is blended with two or more dimethylpolysiloxanes, the dimethylpolysiloxane at 100 mPa‧s is preferably 3% by mass or less, more preferably 1% by mass or less.

<6> The spray cosmetic according to any one of <1> to <5> above, wherein the average molecular weight of the polyethylene glycol in component (B) is preferably 300-10000, more preferably 500-5000.

<7> The spray cosmetic according to any one of the above <1> to <6>, wherein the content of the component (B) in the stock solution is preferably at least 0.1% by mass, more preferably at least 0.3% by mass, and at least 0.5% by mass of the best, and preferably at most 10% by mass, more preferably at most 8% by mass, and at least 5% by mass of the best.

<8> The spray cosmetic according to any one of the above <1> to <7>, wherein the mass ratio (A)/(B) of component (A) to component (B) is preferably 0.5~15, more preferably 0.8~5.

<9> As described in any one of the above <1>-<8> spray cosmetics, wherein the component (C) is preferably an acrylic polymer, more preferably a carboxyvinyl polymer, an acrylic acid/alkyl acrylate copolymer, and particularly preferably a (acrylic acid/alkyl acrylate (C10-30) ester) copolymer.

<10> The spray cosmetic according to any one of the above <1> to <9>, wherein the content of the component (C) in the stock solution is preferably at least 0.05% by mass, more preferably at least 0.1% by mass, and at least 0.2% by mass, preferably at most 1% by mass, more preferably at most 0.8% by mass, and at most 0.7% by mass.

<11> The spray cosmetic according to any one of <1> to <10> above, wherein the nonionic surfactant of component (D) is preferably HLB13-15.

<12> The spray cosmetic according to any one of <1> to <11> above, wherein component (D) is preferably polyoxyethylene alkyl ether or polyoxyethylene hardened castor oil.

<13> The spray cosmetic according to any one of the above <1> to <12>, wherein the content of the component (D) in the stock solution is preferably at least 0.05% by mass, more preferably at least 0.1% by mass, and at least 0.2% by mass of the best, and preferably at most 16% by mass, more preferably at most 4% by mass, and at least 2% by mass of the best.

<14> The spray cosmetic according to any one of <1> to <13> above, wherein the water content of the component (E) in the stock solution is preferably at least 55% by mass, more preferably at least 65% by mass, and at least 70% by mass of the best, and preferably at most 99% by mass, more preferably at most 95% by mass, and at least 90% by mass of the best.

<15> The spray cosmetic according to any one of the above <1> to <14>, wherein the stock solution further contains a component (G) which is an oil agent other than the component (A).

<16> The spray cosmetic as described in the above <15>, wherein the oil agent of component (G) is preferably a liquid oil agent at 25°C, a wax, a paste or a solid fat at 25°C.

<17> The spray cosmetic according to the above <15> or <16>, wherein the content of the component (G) in the stock solution is preferably 0.1 to 15% by mass, more preferably 0.5 to 10% by mass.

<18> The spray cosmetic according to any one of the above <15> to <17>, wherein the total amount of the oil [component (A) and component (G)] in the stock solution is preferably 0.1 to 20% by mass, more preferably 1 to 15% by mass.

<19> The spray-type cosmetic according to any one of <1> to <18> above, which further contains a surfactant other than the component (D) in the stock solution.

<20> The spray cosmetic according to the above <19>, wherein the surfactant other than component (D) is preferably a nonionic surfactant, anionic surfactant, or amphoteric surfactant having an HLB of less than 12.

<21> The spray-type cosmetic as described in <20> above, wherein the nonionic surfactant with an HLB of less than 12 is preferably a sorbitan fatty acid ester with 8 to 22 carbon atoms, an alkyl glyceryl ether, or a polyoxyalkylene modified polysiloxane, and the content in the stock solution is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.7% by mass.

<22> The spray-type cosmetic as described in <20> above, wherein the anionic surfactant is preferably polyoxyethylene alkyl ether phosphoric acid or a salt thereof, acyl glutamic acid or a salt thereof, and the content in the stock solution is preferably 0.01 to 1% by mass, more preferably 0.05 to 0.7% by mass.

<23> The spray cosmetic according to any one of <1> to <22> above, wherein the total content of the total surfactants including component (D) in the stock solution is preferably 0.1 to 10% by mass, more preferably 0.2 to 8% by mass, and most preferably 0.3 to 5% by mass.

<24> The spray cosmetic according to any one of the above <1> to <23>, wherein the stock solution may further contain a dihydric or trihydric alcohol other than the component (B).

<25> The spray-type cosmetic as described in the above <24>, wherein the dihydric or trihydric alcohols other than component (B) are preferably 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, dipropylene glycol, glycerin, diglycerin, or polyglycerin.

<26> The spray-type cosmetic as described in <24> or <25> above, wherein the content of dihydric or trihydric alcohols other than component (B) in the stock solution is preferably 1 to 20% by mass, more preferably 2 to 15% by mass, and most preferably 2 to 10% by mass.

<27> The spray-type cosmetic as described in any one of <1>-<26> above, wherein the viscosity of the stock solution at 25°C is preferably 500-20000 mPa‧s, more preferably 1000-10000 mPa‧s, and most preferably 1500-7000 mPa‧s.

<28> The spray-type cosmetic according to any one of <1>-<27> above, wherein the mass ratio of the stock solution to (F) carbon dioxide gas is preferably 94:6-99.5:0.5, more preferably 95:5-99:1, and most preferably 96.5:3.5-98.5:1.5.

<29> The spray cosmetic according to any one of the above <1> to <28>, which is a skin cosmetic for improving skin tone (brightness, dullness, etc.), improving moisturizing feeling, etc.

<30> The spray cosmetic according to any one of the above <1> to <29>, wherein the cosmetic is applied in the order of applying to the skin, leaving it for a certain period of time, allowing it to penetrate deep into the pores, and then wiping or rinsing.

<31> The spray-type cosmetics described in any one of the above <1> to <30> are produced through the following steps 1 to 4: Step 1: Mix ingredients (C), (E) and alkali ingredients to make them uniform; (In this step 1, preferably heat to above 50°C) Step 2: Add ingredients (A), (B), (D) and other ingredients as needed to the liquid obtained in Step 1, and then stir to make it uniform; Step 3: Mix the ingredients obtained in Step 2 Cool the liquid to 15~30°C; Step 4: Fill the liquid obtained in Step 3 (also called "stock solution") into a pressure-resistant container, seal it, and fill it with ingredient (F) by pressurizing.

[Example] [Examples 1-6 and Comparative Examples 1-2]

Manufacture spray-type cosmetics with the composition shown in Table 1, measure the viscosity of the stock solution at 25°C, and evaluate the use feeling (no sticky feeling, smooth feeling, softness), carbon dioxide volatilization speed, and carbon dioxide volatilization amount. The results are combined and recorded in Table 1.

In addition, the evaluation of the volatilization rate and the volatilization amount of carbon dioxide gas is to explain the volatilization amount of the carbon dioxide gas contained in the foam spouted from the spray cosmetics. Since the foam reaches a certain amount after about 5 minutes, the difference in the volatilization amount can be evaluated according to the amount after 10 minutes.

(Manufacturing method)

Step 1: Mix components (C), (E) and alkali components, and make them uniform at a temperature of 60~70°C.

Step 2: Add ingredients (A), (B), (D), (G) and other ingredients to the liquid obtained in step 1, and stir to make it uniform.

Step 3: Cool the liquid obtained in Step 2 to 15~30°C.

Step 4: Fill the liquid (stock solution) obtained in Step 3 into a pressure-resistant container, seal it, and fill it with component (F) by pressurizing to obtain a spray cosmetic.

(Evaluation method)

(1) Stock solution viscosity:

50 g of the stock solution was filled in a 50 mL glass container, and measured using a BM viscometer (manufactured by Toki Sangyo Co., Ltd.) (rotor No. 4, 12 rpm, 1 minute).

(2) Feeling in use (no stickiness, smoothness, softness)

Three professional reviewers applied 1 g of each spray cosmetic on the inside of the forearm, and performed a sensory evaluation according to the following criteria for the smoothness and softness immediately after application.

1: Not at all.

2: Almost none.

3: Slightly.

4: Yes.

5: Very obvious.

In addition, sensory evaluation was implemented based on the following reference|standard about non-sticky feeling.

1: considerably sticky.

2: There is stickiness.

3: Slightly sticky.

4: Not sticky.

5: There is no stickiness at all.

(3) The volatilization speed of carbon dioxide gas:

As shown in FIG. 1, about 1 g of each spray-type cosmetic material was discharged into a cylindrical glass container (diameter 25 mm inside the container, height 38 mm), and a carbon dioxide gas electrode CE-2041 (manufactured by DKK-TOA Co., Ltd.) was inserted so as not to come into contact with the cosmetic material, and the carbon dioxide gas concentration was measured with the glass container sealed. The measuring device (carbonate ion concentration meter) is ION/pH METER IM-32P.

For the change in carbon dioxide concentration within 4 minutes from 1 minute to 5 minutes from the start of the measurement, calculate the change per minute, set it as the volatilization rate of carbon dioxide (ppm/min), and score according to the following criteria.

1: Less than 15 ppm/min.

2: More than 15 ppm/min and less than 25 ppm/min.

3: More than 25 ppm/min and less than 30 ppm/min.

4: More than 30 ppm/min and less than 35 ppm/min.

5: Above 35ppm/min.

(4) Volatilization of carbon dioxide gas:

Measure the concentration of carbon dioxide in the same manner as (3). The amount of carbon dioxide fully volatilized in the glass container is the carbon dioxide concentration after 10 minutes from the start of the measurement.

1: Less than 65 ppm.

2: More than 65 ppm and less than 100 ppm.

3: More than 100 ppm and less than 150 ppm.

4: More than 150 ppm and less than 200 ppm.

5: More than 200ppm.

From the results in Table 1, it can be seen that Examples 1-6, which belong to the present invention, all have the effect of inhibiting the volatilization of carbon dioxide gas, and inhibit stickiness after application, and have a good balance between smoothness and softness. In Comparative Example 1 using low-viscosity silicone oil, the effect of inhibiting carbon dioxide volatilization is poor, while in Comparative Example 2 using high-viscosity silicone oil, the effect of inhibiting carbon dioxide volatilization and the feeling of use are both poor.

[Examples 7-9, Comparative Example 3]

In the same manner as in Examples 1 to 6, the spray cosmetics with the composition shown in Table 2 were produced, and the viscosity of the stock solution at 25°C was measured, and the feeling of use (no sticky feeling, smooth feeling, softness) was evaluated at the same time. The results are combined and recorded in Table 2.

From the results in Table 2, it can be seen that Examples 7-9, which belong to the present invention, all have the effect of inhibiting the volatilization of carbon dioxide gas, and inhibit stickiness after application, and have a good balance between smoothness and softness. Comparative Example 3 using polyethylene glycol with a relatively large molecular weight has a poor sense of use.

[Test example 1]

For the spray cosmetics of Examples 1-9 and Comparative Examples 1-3, the rate of change in volatilization rate of carbon dioxide gas and the amount of change in volatilization of carbon dioxide gas were evaluated. The results are shown in Table 3.

(Evaluation method)

(5) Change rate of volatilization velocity of carbonic acid gas:

In Example 5, what did not contain dimethylpolysiloxane (component (A)) was made into control prescription. For each spray-type cosmetic, follow the same method as above (3), and calculate the amount of change per minute for the amount of change in carbon dioxide concentration within 4 minutes from 1 minute to 5 minutes from the start of the measurement, and set it as the volatilization rate of carbon dioxide gas (ppm/min). For each spray-type cosmetic, the difference in volatilization speed from that of the control formulation was obtained, which was defined as the change rate of volatilization speed, and the evaluation was performed according to the following benchmark scores.

In addition, the volatilization speed of the control prescription is higher because the volatilization of carbon dioxide gas is not inhibited, so the larger the difference in volatilization speed (the smaller the reference score) with the control prescription, the more the volatilization of carbon dioxide gas is suppressed.

1: The rate of change of the volatilization speed is over 23.5ppm/min.

2: The change rate of the volatilization rate is 13.5 ppm/min or more and less than 23.5 ppm/min.

3: The change rate of the volatilization rate is 8.5 ppm/min or more and less than 13.5 ppm/min.

4: The change rate of the volatilization rate is 3.5 ppm/min or more and less than 8.5 ppm/min.

5: The change rate of the evaporation rate is less than 3.5 ppm/min.

(6) Volatilization variation of carbon dioxide gas:

In the same manner as (5), the carbon dioxide concentration was measured for each spray-type cosmetic, and the carbon dioxide concentration after 10 minutes from the start of the measurement was defined as the carbon dioxide volatilization amount (ppm). For each spray-type cosmetic, the difference in the volatilization amount of carbon dioxide gas from the control formulation was calculated and set as the volatilization change amount, and evaluated according to the following reference points.

In addition, because the volatilization of carbon dioxide gas in the control recipe is not suppressed, the volatilization amount increases. Therefore, the larger the difference between the volatilization amount (the smaller the reference score) and the control prescription, the more the volatilization amount of carbon dioxide gas is suppressed.

1: The amount of change in evaporation is more than 164 ppm.

2: The amount of change in volatilization is 129 ppm or more and less than 164 ppm.

3: The amount of change in volatilization is 79 ppm or more and less than 129 ppm.

4: The amount of change in volatilization is 29 ppm or more and less than 79 ppm.

5: The amount of change in volatility is less than 29 ppm.

[prescription example 1]

The stock solution of formulation example 1 was prepared in the same manner as in Example 1. The stock solution and carbon dioxide gas were filled in a pressure-resistant container at a ratio of 97.6:2.4 to obtain a spray cosmetic.

The obtained spray-type cosmetics are excellent in use feeling (no sticky feeling, smooth feeling, softness), volatilization speed of carbon dioxide gas, and volatilization amount of carbon dioxide gas.

[prescription example 2]

The stock solution of formulation example 2 was prepared in the same manner as in Example 1. The stock solution and carbon dioxide gas were filled in a pressure-resistant container at a ratio of 97.8:2.2 to obtain a spray cosmetic.

The obtained spray-type cosmetics are excellent in use feeling (no sticky feeling, smooth feeling, softness), volatilization speed of carbon dioxide gas, and volatilization amount of carbon dioxide gas.

Claims (6)

A spray-type cosmetic comprising a stock solution and (F) carbon dioxide gas; the stock solution contains the following components: (A), (B), (C), (D) and (E): (A) dimethylpolysiloxane with a viscosity of 6-5000 mPa‧s at 25°C; (B) polyethylene glycol with a molecular weight of 300-15000; (C) a water-soluble thickener; (D) a non-ionic surfactant of HLB12-18; water; and the content of component (A) is 0.1-20% by mass, the mass ratio (A)/(B) of component (A) to component (B) is 0.1-20, and the viscosity at 25°C is 500-20000mPa‧s. Such as the spray-type cosmetics of claim 1, wherein the content of component (B) accounts for 0.1-10% by mass in the stock solution. The spray cosmetic according to claim 1 or 2, wherein component (C) is an acrylic polymer. The spray cosmetic according to claim 1 or 2, wherein the stock solution further contains an oil agent other than component (A). The spray-type cosmetic according to claim 1 or 2, wherein the dimethyl polysiloxane of component (A) contains dimethyl polysiloxane of less than 30 mPa‧s and dimethyl polysiloxane of more than 30 mPa‧s in a mass ratio of 1:0.1 to 1:10. The spray-type cosmetic according to claim 1 or 2, wherein the stock solution further contains a surfactant other than component (D); the surfactant is a nonionic surfactant, anionic surfactant, or amphoteric surfactant with an HLB of less than 12.