JP7536510B2 - Aerosol cosmetics - Google Patents

Description

The present invention relates to an aerosol cosmetic comprising a concentrate and a propellant, the concentrate containing a hydrophilic powder, a specific surfactant, and an oil phase component, and the oil phase component contains a cyclic silicone in an amount less than a certain amount relative to the total amount of the concentrate.

Due to concerns about the ecological impact of cyclic silicone compounds such as octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane in water systems, the European Chemicals Regulation (REACH: Registration, Evaluation, Authorization and Restriction of Chemicals) has prohibited the sale of "products that use octamethylcyclotetrasiloxane or similar compounds (0.1% or more) that are washed off with water after use" since January 31, 2020. Therefore, in order to reduce the burden on the environment, it is desirable to avoid the inclusion of cyclic silicone compounds in cosmetic formulations.

On the other hand, because cyclic silicone compounds contribute greatly to the dispersibility of powders and compatibility with other oily ingredients and surfactants (the property of keeping the oil phase as a uniform single phase), it is extremely difficult to develop a formulation for an aerosol cosmetic that maintains dispersibility and compatibility without incorporating cyclic silicone compounds.

Although deodorant compositions that do not contain cyclic silicone compounds are known (see Patent Documents 1 and 2), further improvements are required in terms of dispersibility and compatibility.

JP 2009-102271 A JP 2016-117698 A

The inventors have surprisingly found that even when cyclic silicone is used in an amount of less than 1% by mass relative to the total amount of the concentrate, by adding a hydrophilic powder, a specific surfactant, and an oil phase component to the concentrate of an aerosol cosmetic, it is possible to slow down the deposition rate of the hydrophilic powder and/or increase the redispersibility of the hydrophilic powder while maintaining high compatibility between the surfactant and the oily component. The present invention is based on these findings.

Therefore, the present invention discloses an aerosol cosmetic comprising a concentrate and a propellant, the concentrate containing a hydrophilic powder, a specific surfactant, and an oil phase component, and the oil phase component contains cyclic silicone in an amount of less than 1 mass% relative to the total amount of the concentrate.

According to the present invention, the following inventions are provided.
(1) An aerosol cosmetic comprising a concentrate and a propellant, the concentrate comprising:
(A) a hydrophilic powder;
(B) one or more surfactants selected from the group consisting of polyoxyethylene hydrogenated castor oil triisostearate, polyoxyethylene glyceryl triisostearate, sorbitan oleate, and polyglyceryl triisostearate, and having an HLB of less than 9;
(C) an oil phase component, and the cyclic silicone contained in the oil phase component (C) is less than 1 mass % relative to the total amount of the concentrate.
(2) The aerosol cosmetic preparation according to (1), wherein the surfactant in the concentrate is polyoxyethylene hydrogenated castor oil triisostearate.
(3) The aerosol cosmetic according to (1) or (2), wherein the blending amount of the hydrocarbon oil in the oil phase component (C) is 20 mass% or more based on the total amount of the oil phase components.
(4) The aerosol cosmetic according to (1) or (2), wherein the blending amount of the volatile hydrocarbon oil in the oil phase component (C) is 20 mass% or more relative to the total amount of the oil phase components.
(5) The aerosol cosmetic preparation according to any one of (1) to (4), wherein the oil phase component (C) is a liquid oily component.
(6) The aerosol cosmetic according to any one of (1) to (5), wherein the propellant is liquefied petroleum gas.
(7) The aerosol cosmetic preparation according to any one of (1) to (6), wherein the hydrophilic powder (A) is one or more types selected from the group consisting of silica, talc, and aluminum chlorohydrate.
(8) The aerosol cosmetic preparation according to any one of (1) to (7), wherein the blending amount of the surfactant (B) is 0.1 to 5 mass % relative to the total amount of the concentrate.
(9) The aerosol cosmetic preparation according to any one of (1) to (8), which is a deodorant spray.
(10) The aerosol cosmetic preparation according to any one of (1) to (9), wherein the cyclic silicone contained in the oil phase component (C) is less than 0.1% by mass relative to the total amount of the concentrate.

In particular, for sprays containing powder, the contents must be sprayed uniformly from the beginning to the end of use, and therefore it is important to slow down the deposition rate of the powder and to increase redispersibility. In addition, when considering the filling process of the aerosol cosmetic, it is preferable from the viewpoint of ease of use and storage to increase the compatibility of the oily component. By using the aerosol cosmetic of the present invention, even when the cyclic silicone is used in a proportion of less than 1 mass% relative to the total amount of the concentrate, it is advantageous in that high compatibility can be maintained in the aerosol cosmetic, and it is also advantageous in that the deposition rate of the hydrophilic powder can be slowed and/or the redispersibility of the hydrophilic powder can be increased.

Description of the Invention

The present invention relates to an aerosol cosmetic preparation comprising a concentrate and a propellant, the concentrate comprising:
(A) a hydrophilic powder;
(B) one or more surfactants selected from the group consisting of polyoxyethylene hydrogenated castor oil triisostearate, sorbitan oleate, and polyglyceryl triisostearate, and having an HLB of less than 9;
(C) an oil phase component, and the cyclic silicone contained in the oil phase component (C) is less than 1 mass % based on the total amount of the concentrate.

The propellant contained in the aerosol cosmetic of the present invention is not particularly limited as long as it is a propellant that can be used in aerosol products in general, but for example, various types of liquefied petroleum gas (LPG), dimethyl ether, a mixture of liquefied petroleum gas and dimethyl ether, compressed gas, etc. can be used. LPG is a liquefied petroleum gas whose main components are propane, butane, and isobutane. Among these, the propellant contained in the aerosol cosmetic of the present invention is preferably liquefied petroleum gas from the viewpoints of sprayability and solubility.

The concentrate contained in the aerosol cosmetic of the present invention contains (A) a hydrophilic powder, (B) one or more surfactants selected from the group consisting of polyoxyethylene hydrogenated castor oil triisostearate, sorbitan oleate, and polyglyceryl triisostearate, and (C) an oil phase component. Each component contained in the concentrate is described below.

The hydrophilic powder contained in the concentrate of the aerosol cosmetic of the present invention is not particularly limited as long as it is one that is normally used in cosmetics, and may be an inorganic hydrophilic powder or an organic hydrophilic powder. Examples of hydrophilic powders contained in the concentrate of the aerosol cosmetic of the present invention include inorganic powders such as silica, talc, zinc oxide, titanium oxide, silicic anhydride, mica, sericite, kaolin, potassium aluminum sulfate, aluminum chlorohydrate, and clay minerals, and organic powders such as cellulose, modified cellulose, starch, and modified starch, and are preferably one or more types selected from the group consisting of silica and talc, and more preferably talc.

The surfactant contained in the concentrate of the aerosol cosmetic of the present invention is one or more surfactants selected from the group consisting of polyoxyethylene hydrogenated castor oil triisostearate, polyoxyethylene glyceryl triisostearate, sorbitan oleate, and polyglyceryl triisostearate, and has an HLB (hydrophile-lipophile balance) of less than 9. Preferred polyoxyethylene glyceryl triisostearates having an HLB of less than 9 contained in the concentrate of the aerosol cosmetic of the present invention include, for example, PEG-10 glyceryl triisostearate (10 moles of polyoxyethylene added), PEG-15 glyceryl triisostearate (15 moles of polyoxyethylene added), and PEG-20 glyceryl triisostearate (20 moles of polyoxyethylene added), with PEG-10 glyceryl triisostearate being more preferred from the viewpoint of redispersibility. Examples of polyoxyethylene hydrogenated castor oil triisostearate having a preferred HLB value of less than 9 contained in the stock solution of the aerosol cosmetic of the present invention include polyoxyethylene hydrogenated castor oil triisostearate (10 E.O.) (10 moles of polyoxyethylene added), polyoxyethylene hydrogenated castor oil triisostearate (15 E.O.) (15 moles of polyoxyethylene added), polyoxyethylene hydrogenated castor oil triisostearate (20 E.O.) (20 moles of polyoxyethylene added), and polyoxyethylene hydrogenated castor oil triisostearate (30 E.O.) (30 moles of polyoxyethylene added), with polyoxyethylene hydrogenated castor oil triisostearate (20 E.O.) being particularly preferred. Here, HLB represents the degree of affinity for water and oil, and the HLB value in the present invention is a value measured by the Davis method. The HLB value of the surfactant contained in the stock solution of the aerosol cosmetic of the present invention is not particularly limited as long as it is less than 9.

The amount of surfactant contained in the concentrate of the aerosol cosmetic of the present invention is not particularly limited, but is preferably 0.1 to 5% by mass, more preferably 0.1 to 3% by mass, and even more preferably 0.1 to 1% by mass, based on the total amount of the concentrate in the aerosol cosmetic of the present invention.

The oil phase components contained in the concentrate of the aerosol cosmetic of the present invention are not particularly limited, but preferably include hydrocarbon oils, synthetic ester oils, silicone oils, liquid oils, solid oils, waxes, and fragrances that are typically used in cosmetics, quasi-drugs, etc., and among these, it is preferable to contain a hydrocarbon oil, and it is more preferable to contain a volatile hydrocarbon oil. The oil phase components contained in the concentrate of the aerosol cosmetic of the present invention are preferably liquid oily components.

Examples of hydrocarbon oils include isoparaffins such as isododecane, isohexadecane, hydrogenated isoparaffin, liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, etc., among which volatile hydrocarbon oils are preferred. Volatile hydrocarbon oils are relatively low molecular weight hydrocarbon oils (boiling points of about 250°C or less), and specific examples include hydrogenated polyisobutene, isododecane, isohexadecane, etc., with a carbon number of 16 or less, among which isododecane and/or isohexadecane are preferred.

Examples of synthetic ester oils include octyl octanoate, nonyl nonanoate, cetyl octanoate, isopropyl myristate, octyldodecyl myristate, isopropyl palmitate, ethylhexyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyldecyl dimethyloctanoate, cetyl lactate, myristyl lactate, lanolin acetate, isocetyl stearate, isocetyl isostearate, 12-hydroxystearate, ethylhexyl palmitate, ethylhexyl ole ... Cholesteryl stearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, N-alkyl glycol monoisostearate, neopentyl glycol dicaprate, tripropylene glycol pivalate, diisostearyl malate, glycerin di-2-heptylundecanoate, glycerin diisostearate, trimethylolpropane tri-2-ethylhexanoate, trimethylolpropane triisostearate, tetra-2-ethyl Pentaerythritol ethylhexanoate, glycerin tri-2-ethylhexanoate, glycerin trioctanoate, glycerin triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate-2-ethylhexyl palmitate, glycerin trimyristate, tri-2-heptylundecanoate glyceride, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, adipic acid Examples of the ethylhexyl ester include diisobutyl phosphate, N-lauroyl-L-glutamic acid-2-octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate, diisopropyl sebacate, 2-ethylhexyl succinate, triethyl citrate, and cetyl ethylhexanoate, and among these, cetyl ethylhexanoate is preferred.

Examples of silicone oils include linear polysiloxanes (e.g., dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.), silicone resins that form a three-dimensional network structure, silicone rubber, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.), acrylic silicones, etc.

Examples of liquid oils include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, sasanqua oil, castor oil, linseed oil, safflower oil, cottonseed oil, perilla oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, Chinese tung oil, Japanese tung oil, jojoba oil, germ oil, triglycerin, etc.

Examples of solid fats and oils include cacao butter, coconut oil, horse tallow, hardened coconut oil, palm oil, beef tallow, mutton tallow, hardened beef tallow, palm kernel oil, lard, beef bone fat, Japan Rice Kernel Oil, hardened oil, beef foot fat, Japan Rice, and hardened castor oil.

Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ivory wax, whale wax, montan wax, bran wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, etc.

Fragrances include, but are not limited to, natural fragrances obtained from animals or plants, synthetic fragrances produced by chemical synthesis, and compound fragrances which are mixtures of these. By blending fragrances, it is possible to obtain cosmetics with excellent long-lasting fragrances.

The amount of hydrocarbon oil in the oil phase components contained in the concentrate of the aerosol cosmetic of the present invention is not particularly limited, but is preferably 20% by mass or more, more preferably 30% by mass or more, and even more preferably 40% by mass or more, based on the total amount of the oil phase components.

The amount of volatile hydrocarbon oil in the oil phase components contained in the concentrate of the aerosol cosmetic of the present invention is not particularly limited, but is preferably 20% by mass or more, more preferably 30% by mass or more, and even more preferably 40% by mass or more, based on the total amount of the oil phase components.

The cyclic silicone contained in the oil phase of the aerosol cosmetic of the present invention in an amount of less than 1% by mass relative to the total amount of the concentrate is not particularly limited, but examples thereof include octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexasiloxane, etc. The cyclic silicone compound is contained in an amount of less than 1% by mass relative to the total amount of the concentrate of the aerosol cosmetic of the present invention, preferably less than 0.5% by mass, more preferably less than 0.1% by mass, and even more preferably less than 0.05% by mass.

The aerosol cosmetic of the present invention may contain a dispersant, which is not particularly limited, but is preferably calcium stearate or zinc myristate.

The aerosol cosmetic of the present invention may contain an antiperspirant, a bactericide, and/or a deodorant. In a preferred embodiment of the present invention, the aerosol cosmetic of the present invention is a deodorant spray. In another preferred embodiment of the present invention, the aerosol cosmetic of the present invention is an antiperspirant spray.

Examples of antiperspirants that may be included in the aerosol cosmetic of the present invention include aluminum chlorohydrate, zinc paraphenolsulfonate, aluminum chloride, aluminum sulfate, aluminum citrate, aluminum acetate, basic aluminum chloride, aluminum phenolsulfonate, aluminum β-naphthol disulfonate, sodium perborate, aluminum zirconium octachlorohydrate, aluminum zirconium pentachlorohydrate, aluminum zirconium tetrachlorohydrate, aluminum zirconium trichlorohydrate, zirconium chlorohydrate, aluminum potassium sulfate, aluminum chlorohydrate allantoin, basic aluminum bromide, aluminum naphthalene sulfonate, basic aluminum iodide, and zinc oxide. One or more of these may be blended, and preferably zinc oxide and/or aluminum chlorohydrate are blended.

Examples of bactericides that may be included in the aerosol cosmetic of the present invention include benzalkonium chloride, triclosan, isopropylmethylphenol, 3,4,4-trichlorocarbanilide (T.C.C), triethyl citrate (T.E.C), benzothonium chloride, alkyltrimethylammonium chloride, resorcinol, phenol, sorbic acid, salicylic acid, hexachlorophene, chlorhexidine gluconate, chlorhexidine hydrochloride, silver-supported zeolite, and silver-supported silica. One or more of these may be blended. Benzalkonium chloride, triclosan, and isopropylmethylphenol are preferred, and isopropylmethylphenol is more preferred.

Examples of deodorants that may be included in the aerosol cosmetic of the present invention include zinc oxide, zinc oxide composite powder, surface-hydrophobized zinc oxide, activated carbon, and plant extracts such as green tea extract. One or more of these may be blended. Preferably, zinc oxide, zinc oxide composite powder, or surface-hydrophobized zinc oxide is blended, and more preferably, zinc oxide is used.

In addition to the above-mentioned components, the aerosol cosmetic of the present invention may contain, as necessary, for example, moisturizers, water-soluble polymers, thickeners, film-forming agents, UV absorbers, sequestering agents, sugars, amino acids, organic amines, polymer emulsions, pH adjusters, skin nutrients, vitamins, antioxidants, antioxidant assistants, water, etc.

The present invention will be specifically described based on the following examples, but the present invention is not limited to these examples. The blend amounts are shown in mass % unless otherwise specified.

Test Example 1: Evaluation of compatibility, deposition rate, and redispersibility of hydrophilic powder in aerosol cosmetics The aerosol cosmetics of Formulation Examples 1 to 11 below were evaluated for "compatibility of the oil phase,""deposition rate of hydrophilic powder," and "redispersibility of hydrophilic powder."

The "compatibility of the oil phase" was evaluated for Formulation Examples 1 to 11 at each of the following time points: "immediately after preparation,""2 weeks at room temperature after preparation," and "3 days at 40°C after preparation," based on the following evaluation criteria.
<Evaluation criteria for compatibility of oil phase>
A: A clear layer B: Mist is visible
C: Precipitation is observed

The "deposition rate" was evaluated according to the following criteria by filling each of Formulation Examples 1 to 11 into a pressure-resistant glass bottle, shaking it, and then leaving it to stand for 5 seconds, and visually judging the amount of powder deposition.
<Deposition rate evaluation criteria>
±: Same as Control -1: About twice as much as Control -2: About three times as much as Control

For "redispersibility", Formulation Examples 1 to 11 were filled into a pressure-resistant glass bottle, and left to stand for 4 weeks at 0°C, room temperature, and 40°C, after which the bottle was shaken to determine the average number of shakes at each temperature until the powder peeled off from the bottom of the glass bottle, and evaluated based on the following evaluation criteria. For example, when the number of shakes at 0°C was 10, the number of shakes at room temperature was 10, and the number of shakes at 40°C was 15, the average number of shakes was about 11.7, and the evaluation was "±".
<Evaluation criteria for redispersibility>
-2: Average number of shakings is 20 or more -1: Average number of shakings is 15 or more and less than 20 ±: Average number of shakings is 10 or more and less than 15 +1: Average number of shakings is 5 or more and less than 10

It was found that by adding polyoxyethylene hydrogenated castor oil triisostearate, sorbitan oleate, or polyglyceryl triisostearate (surfactant) to an aerosol cosmetic (see Formulation Examples 9 to 11), it was possible to achieve the same levels of "oil phase compatibility," "powder deposition rate," and "powder redispersibility" as when cyclic silicone (decamethylcyclopentasiloxane) and PEG-10 dimethicone were added. Furthermore, it was found that, among the aerosol cosmetics of Formulation Examples 9 to 11, the aerosol cosmetic of Formulation Example 11, which contains polyoxyethylene hydrogenated castor oil triisostearate, is an extremely superior cosmetic in terms of "oil phase compatibility," "powder deposition rate," and "powder redispersibility."

Test Example 2: Evaluation of the type of surfactant in an aerosol cosmetic preparation and the compatibility, deposition rate, and redispersibility of hydrophilic powder The aerosol cosmetics of the following Formulation Examples 12 to 22 were evaluated for "compatibility of the oil phase,""deposition rate of the hydrophilic powder," and "redispersibility of the hydrophilic powder." The evaluations of "compatibility of the oil phase,""deposition rate of the hydrophilic powder," and "redispersibility of the hydrophilic powder" were performed in the same manner as in Test Example 1.

It was found that when PEG-20 glyceryl triisostearate, PEG-10 glyceryl, or PEG-15 glyceryl triisostearate or polyoxyethylene hydrogenated castor oil triisostearate (10 E.O.), (15 E.O.), or (30 E.O.) was added to the aerosol cosmetic (Formulation Examples 12-15 or 19-20), it was superior in terms of compatibility of the oil phase and in terms of deposition rate of the hydrophilic powder and/or redispersibility of the hydrophilic powder compared to when polyoxyethylene hydrogenated castor oil triisostearate (40 E.O.), (50 E.O.), or (60 E.O.) or PEG-30 glyceryl triisostearate or PEG-40 glyceryl triisostearate was added (Formulation Examples 16-18 or 21-22). In other words, it was found that the use of a specific surfactant with an HLB value of less than 9 provides excellent compatibility with the oil phase and has an excellent effect on the deposition rate of the hydrophilic powder and/or the redispersibility of the hydrophilic powder.

Test Example 3: Evaluation of the amount of surfactant blended in the aerosol cosmetic preparation, and the compatibility, deposition rate, and redispersibility of the hydrophilic powder The aerosol cosmetics of the following Formulation Examples 11 and 23 to 26 were evaluated for "compatibility of the oil phase,""deposition rate of the hydrophilic powder," and "redispersibility of the hydrophilic powder." The evaluations of "compatibility of the oil phase,""deposition rate of the hydrophilic powder," and "redispersibility of the hydrophilic powder" were performed in the same manner as in Test Example 1.

When polyoxyethylene hydrogenated castor oil triisostearate (20 E.O.) was added to an aerosol cosmetic, and when this surfactant was added in an amount of 0.6, 1, 3, or 5 mass% based on the total amount of the original solution (see Formulation Examples 11 and 23 to 26), good results were obtained in terms of compatibility of the oil phase in all cases, and good results were obtained in terms of the deposition rate of the hydrophilic powder and/or the redispersibility of the hydrophilic powder.

Test Example 4: Evaluation of the ratio of non-polar oily components in an aerosol cosmetic, and the compatibility, deposition rate, and redispersibility of hydrophilic powder The aerosol cosmetics of the following Formulation Examples 11 and 27 to 29 were evaluated for "compatibility of the oil phase,""deposition rate of the hydrophilic powder," and "redispersibility of the hydrophilic powder." The evaluations of "compatibility of the oil phase,""deposition rate of the hydrophilic powder," and "redispersibility of the hydrophilic powder" were performed in the same manner as in Test Example 1.

In aerosol cosmetics, it was found that regardless of the ratio of non-polar oil in the oil phase (see Formulation Examples 11 and 27 to 29), the compatibility of the oil phase is excellent, and the deposition rate of the hydrophilic powder and/or the redispersibility of the hydrophilic powder are excellent.

Claims (7)

An aerosol cosmetic comprising a concentrate and a propellant, the concentrate comprising:
(A) a hydrophilic powder;
(B) one or more surfactants selected from the group consisting of polyoxyethylene hydrogenated castor oil triisostearate, polyoxyethylene glyceryl triisostearate, sorbitan oleate, and polyglyceryl triisostearate, and having an HLB of less than 9;
(C) an oil phase component, and the cyclic silicone contained in the (C) oil phase component is less than 1 mass% based on the total amount of the original solution ,
The amount of the volatile hydrocarbon oil in the oil phase component (C) is 20% by mass or more based on the total amount of the oil phase component (C);
(B) An aerosol cosmetic preparation, in which the blending amount of the surfactant is 0.1 to 5% by mass relative to the total amount of the concentrate . 2. The aerosol cosmetic preparation according to claim 1, wherein the surfactant (B) in the concentrate is polyoxyethylene hydrogenated castor oil triisostearate. 3. The aerosol cosmetic preparation according to claim 1, wherein the oil phase component (C) is a liquid oily component. The aerosol cosmetic preparation according to any one of claims 1 to 3 , wherein the propellant is liquefied petroleum gas. 5. The aerosol cosmetic preparation according to claim 1 , wherein the hydrophilic powder (A) is one or more types selected from the group consisting of silica, talc, and aluminum chlorohydrate. The aerosol cosmetic preparation according to any one of claims 1 to 5 , which is a deodorant spray. The aerosol cosmetic preparation according to any one of claims 1 to 6 , wherein the cyclic silicone contained in the oil phase component (C) is less than 0.1% by mass with respect to the total amount of the concentrate.