Foaming method

Abstract

To provide a foaming method and article with improved foamability.SOLUTION: There are provided [1] a foaming method comprising: a step (X) of mixing a foamable composition containing (A) a foaming agent whose dynamic surface tension begins to decrease within 60,000 ms by the maximum foam pressure method and (B) an organic solvent with a gas to foam; and a step (Y) of miniaturizing the bubbles by using a porous body, as well as [2] an article comprising a foam dispensing container and a foamable composition in the foam dispensing container, the foamable composition containing (A) a foaming agent whose dynamic surface tension begins to decrease within 60,000 ms by the maximum foam pressure method and (B) an organic solvent, and the foam dispensing mechanism of the foam dispensing container comprising a porous body.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to foaming methods and articles. [Background technology]

[0002] Compositions used in perfumes, cosmetics, skin care products, toiletry products, and the like may contain a foaming agent to increase the volume of the composition and improve properties such as uniform application, drip prevention, shape retention, and softness to the touch. In addition, an organic solvent may be blended into the composition to improve coating properties.

[0003] Techniques relating to foamable compositions containing a foaming agent and an organic solvent include those described in Patent Documents 1 and 2, for example. Patent Document 1 describes that a foamable transparent composition that can be foamed by mixing with air and does not contain a propellant, which composition contains a water-immiscible solvent and a siloxane resin foam stabilizer, can be used for cosmetic applications.

[0004] Patent Document 2 describes a personal care composition that contains oil and a siloxane resin foam stabilizer and is substantially free of surfactants and propellants, and is capable of foaming, transparent, and non-sticky. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2009 / 003946 [Patent Document 2] US Patent Application Publication No. 2009 / 0010862 Summary of the Invention [Problem to be solved by the invention]

[0006] A foamable composition containing a foaming agent and an organic solvent can foam the organic solvent, and therefore has good applicability, but there is room for improvement in terms of foamability. The present invention relates to a foaming method and article with improved foaming properties. [Means for solving the problem]

[0007] The present inventors have found that foamability can be improved by mixing a foamable composition containing a foaming agent and an organic solvent that satisfy specific dynamic surface tension characteristics with a gas to foam it, and by using a porous body to make the bubbles finer.

[0008] That is, the present invention relates to the following [1] and [2]. [1] A step (X) of mixing a foamable composition containing a foaming agent (A) and an organic solvent (B), the foaming composition having a dynamic surface tension decrease time of 60,000 ms or less as measured by the following measurement method 1, with a gas to foam the composition; A foaming method comprising: a step (Y) of micronizing the foam using a porous body. (Measurement method 1) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, the dynamic surface tensions of the foaming agent (A) solution and the organic solvent (B) alone are measured at 25°C using a maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time (ms) at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time at which the dynamic surface tension begins to decrease. [2] An article comprising a foam dispenser container and a foamable composition in the foam dispenser container, The foamable composition contains a foaming agent (A) and an organic solvent (B), and the time required for the dynamic surface tension to begin to decrease is within 60,000 ms, as measured by the following measurement method 1; The foam dispensing mechanism of the foam dispensing container is an article including a porous body. (Measurement method 1) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, the dynamic surface tensions of the foaming agent (A) solution and the organic solvent (B) alone are measured at 25°C using a maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time (ms) at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time at which the dynamic surface tension begins to decrease. [Effects of the Invention]

[0009] According to the present invention, a foaming method and an article with improved foaming properties can be provided. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Foaming method] The foaming method of the present invention includes a step (X) of mixing a foamable composition containing a foaming agent (A) and an organic solvent (B), the foaming composition having a dynamic surface tension that begins to decrease within 60,000 ms as measured by Measurement Method 1 below, with a gas to foam the composition, and a step (Y) of refining the bubbles using a porous material. (Measurement method 1) A foaming agent (A) is dissolved in an organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, the dynamic surface tension of the foaming agent (A) solution and the organic solvent (B) alone is measured at 25°C using the maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The first time at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time (ms) at which the dynamic surface tension begins to decrease. The maximum bubble pressure method is a method in which gas is sent into a thin tube (probe) inserted into a liquid, the maximum pressure (maximum bubble pressure) is measured when a bubble is generated from the tip of the probe, and the surface tension is calculated. The basic principle is based on the Young-Laplace equation. The organic solvent (B) used in measurement method 1 is of the same type and composition as the organic solvent (B) constituting the target foamable composition according to the present invention. The details of the method for measuring the dynamic surface tension are as described in the Examples below.

[0011] According to the foaming method of the present invention, foaming properties can be improved. In this specification, the more fine and voluminous the foam produced, the better the foaming ability can be determined, and the longer the time it takes for the foam to disappear after it is produced, the better the foam stability can be determined.

[0012] According to the foaming method of the present invention, a foamable composition containing a foaming agent (A) and an organic solvent (B) that satisfy specific dynamic surface tension characteristics is mixed with a gas to foam, and the foam is then refined using a porous material, thereby improving foamability. The reason for this is unclear, but is thought to be as follows. First, the time when the dynamic surface tension of the foaming agent (A) starts to decrease indicates the rate of decrease in dynamic surface tension, which is thought to represent the speed at which the foaming agent (A) adsorbs to the gas-liquid interface, i.e., the rate at which the interfacial film between the gas and liquid is formed. By incorporating a foaming agent (A) whose dynamic surface tension starts to decrease within 60,000 ms and an organic solvent (B), the rate at which the interfacial film between the gas and liquid is formed increases, improving the rate and amount of foam formation. Furthermore, the generated foam can be refined by the porous material, which is thought to improve foamability.

[0013] (foaming composition) <Foaming agent (A)> The foamable composition according to the present invention comprises a foaming agent (A). In this specification, the term "foaming agent" refers to a compound that, when dissolved in a solvent, generates bubbles in the resulting solution and stabilizes the generated bubbles to prevent them from disappearing. The foaming agent (A) may be used alone or in combination of two or more kinds.

[0014] The foaming agent (A) preferably contains a silicone (A1) from the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the durability and water resistance of the coating film obtained from the foamable composition according to the present invention.

[0015] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the durability and water resistance of the coating film obtained from the foamable composition according to the present invention, the silicone (A1) may be selected from the group consisting of trimethylsiloxysilicate, phenylpropyldimethylsiloxysilicate, fluorine-modified alkyldimethylsiloxysilicate, crosspolymers of these siloxysilicates crosslinked with dimethiconol or the like, polydimethylsiloxane, polyhydromethylsiloxane, hydrosilyl-modified silicone, polyether-modified silicone, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, carbinol-modified silicone, phenyl-modified silicone, polyglycerin-modified silicone, higher fatty acid ester-modified silicone, polysiloxane betaine, and polysilicone-9. Preferably, the silicone oil composition contains at least one selected from the group consisting of trimethylsiloxysilicate, polydimethylsiloxane, polyether-modified silicone, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, carbinol-modified silicone, and phenyl-modified silicone, more preferably, it contains at least one selected from the group consisting of trimethylsiloxysilicate, polydimethylsiloxane, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, and carbinol-modified silicone, and even more preferably, it contains at least one selected from the group consisting of trimethylsiloxysilicate, polydimethylsiloxane, polyether-modified silicone, carboxy-modified silicone, and amino-modified silicone.

[0016] Polyether-modified silicones have a structure in which alkyl groups on the side chains and / or terminals of silicone are substituted with polyether groups. The polyether groups are preferably at least one selected from the group consisting of polyethyleneoxy groups, polypropyleneoxy groups, and polyalkyleneoxy groups in which ethyleneoxy groups (EO) and propyleneoxy groups (PO) are added in a block or random manner, and more preferably polyethyleneoxy groups.

[0017] The foaming agent (A) may contain a foaming agent other than the silicone (A1) as long as the effects of the invention are not impaired. Examples of foaming agents other than the silicone (A1) include polymer surfactants such as (meth)acrylic polymers.

[0018] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, the content of silicone (A1) in the foaming agent (A) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and preferably 100% by mass or less.

[0019] The time at which the dynamic surface tension of the foaming agent (A) begins to decrease as measured by the measurement method 1 is within 60,000 ms, but from the viewpoint of further improving the foamability and foam stability of the foamable composition according to the present invention, it is preferably within 10,000 ms, more preferably within 6,000 ms, even more preferably within 3,000 ms, even more preferably less than 1000 ms, even more preferably within 800 ms, even more preferably within 600 ms, even more preferably within 500 ms, even more preferably within 250 ms, even more preferably within 200 ms, even more preferably within 150 ms, even more preferably within 100 ms, even more preferably within 70 ms, even more preferably within 60 ms. The lower limit of the time at which the dynamic surface tension begins to decrease as measured by the measurement method 1 is not particularly limited, but may be, for example, 1 ms or more, or 5 ms or more.

[0020] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, the foaming agent (A) preferably has a static surface tension reduction of 0.5 mN / m or more, more preferably 0.7 mN / m or more, even more preferably 1.0 mN / m or more, even more preferably 1.5 mN / m or more, even more preferably 1.7 mN / m or more, even more preferably 1.8 mN / m or more, and even more preferably 2.0 mN / m or more, as measured by the following measurement method 2. The upper limit of the static surface tension reduction as measured by the following measurement method 2 is not particularly limited, and may be, for example, 10.0 mN / m or less, 7.0 mN / m or less, 5.0 mN / m or less, 3.5 mN / m or less, or 3.0 mN / m or less. (Measurement method 2) A foaming agent (A) is dissolved in an organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, a ring is pulled up at a speed of 1 mm / min by the Du Nouy method for the foaming agent (A) solution and the organic solvent (B) alone, and the static surface tension at 25°C is measured for each. The value obtained by subtracting the static surface tension of the foaming agent (A) solution from the static surface tension of the organic solvent (B) alone is taken as the decrease in static surface tension (mN / m). The organic solvent (B) used in measurement method 2 is of the same type and composition as the organic solvent (B) constituting the target foamable composition according to the present invention. The details of the method for measuring the static surface tension are as described in the Examples below.

[0021] <Organic solvent (B)> The foamable composition according to the present invention comprises an organic solvent (B). The organic solvent (B) may be used alone or in combination of two or more kinds.

[0022] The organic solvent (B) is preferably liquid at 25°C, from the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the applicability to hair, skin, etc. In this specification, "liquid at 25°C" refers to a state in which the material has fluidity in bulk under an environment of 1 atmosphere and 25°C.

[0023] From the viewpoint of further improving the foamability of the foamable composition of the present invention, the surface tension of the organic solvent (B) is preferably 18 mN / m or more, more preferably 22 mN / m or more, more preferably 24 mN / m or more, and is preferably 35 mN / m or less, more preferably 30 mN / m or less, more preferably 28 mN / m or less. The surface tension of the organic solvent (B) is a static surface tension measured at 25° C. by the Du Nouy method, and the details of the measurement method are as described in the Examples below.

[0024] From the viewpoint of further improving the foamability of the foamable composition according to the present invention, the shear viscosity of the organic solvent (B) is preferably 40 mPa·s or less, more preferably 32 mPa·s or less, more preferably 13 mPa·s or less, more preferably 11 mPa·s or less, and is preferably 0.5 mPa·s or more, more preferably 1.5 mPa·s or more, more preferably 2.5 mPa·s or more, more preferably 3.0 mPa·s or more. 25℃, shear rate 500 s -1 The details of the method for measuring the shear viscosity of the organic solvent (B) are as described in the Examples below.

[0025] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the applyability to hair, skin, etc., the number of carbon atoms in the organic solvent (B) is preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, even more preferably 4 or more, even more preferably 5 or more, even more preferably 6 or more, even more preferably 8 or more, and is preferably 30 or less, more preferably 25 or less, even more preferably 22 or less, even more preferably 20 or less, even more preferably 19 or less, even more preferably 18 or less.

[0026] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the applicability to hair, skin, etc., the organic solvent (B) preferably contains at least one water-immiscible solvent (B1) selected from the group consisting of hydrocarbon oils, ester oils, fatty acids, vegetable oils, and mineral oils, and more preferably contains at least one water-immiscible solvent (B1) selected from the group consisting of hydrocarbon oils, ester oils, and fatty acids.

[0027] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and further improving the applicability to hair, skin, etc., the hydrocarbon oil preferably contains at least one selected from the group consisting of α-olefin oligomers; liquid paraffins; liquid isoparaffins such as isodecane, isododecane, isohexadecane, and hydrogenated polyisobutene (light liquid isoparaffin, heavy liquid isoparaffin, etc.); liquid ozokerite; squalane; pristane; and squalene. Among these, from the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the applicability to hair, skin, etc., the hydrocarbon oil is preferably liquid isoparaffin, more preferably light liquid isoparaffin, even more preferably at least one selected from the group consisting of isododecane, isohexadecane, and hydrogenated polyisobutene, even more preferably hydrogenated polyisobutene, even more preferably hydrogenated polyisobutene having from 8 to 22 carbon atoms, even more preferably hydrogenated polyisobutene having from 8 to 18 carbon atoms, even more preferably hydrogenated polyisobutene having from 14 to 18 carbon atoms.

[0028] Examples of the ester oil include, from the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention and further improving the applicability to hair, skin, and the like, cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, hexyl laurate, isostearyl laurate, butyl myristate, isopropyl myristate, decyl myristate, isotridecyl myristate, isocetyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, It is preferable that the composition contains at least one selected from the group consisting of 2-ethylhexyl stearate, isopropyl isostearate, isodecyl neopentanoate, ethyl oleate, isodecyl oleate, ethyl linoleate, isopropyl linoleate, lanolin acetate, castor oil fatty acid methyl ester (methyl ricinoleate), glyceryl tri-2-ethylhexanoate, glyceryl caprylate, glyceryl tri(caprylic / capric acid), neopentyl glycol di-2-ethylhexanoate, propanediol di(caprylic / capric acid), and alkyl benzoate (alkyl having 12 to 15 carbon atoms). Among these, from the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and further improving the applicability to hair, skin, etc., the ester oils preferably include cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, hexyl laurate, isostearyl laurate, butyl myristate, isopropyl myristate, decyl myristate, isotridecyl myristate, isocetyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, isopropyl isostearate, neopentyl ester, methyl ... It is preferable that the surfactant contains at least one selected from the group consisting of isodecyl isononate, glyceryl caprylate, caprylic / capric triglyceride, neopentyl glycol di-2-ethylhexanoate, dicaprylic / capric propanediol, and alkyl benzoate (alkyl having 12 to 15 carbon atoms), more preferably at least one selected from the group consisting of isononyl isononanoate, isopropyl myristate, isopropyl palmitate, and 2-ethylhexyl palmitate, even more preferably at least one selected from isononyl isononanoate and 2-ethylhexyl palmitate, and even more preferably isononyl isononanoate.

[0029] The fatty acid preferably contains at least one selected from the group consisting of 2-ethylhexanoic acid, lauric acid, myristic acid, pentadecanoic acid, palmitic acid, palmitoleic acid, margadelic acid, stearic acid, oleic acid, and linoleic acid, from the viewpoint of further improving the foaming ability and foam stability of the foamable composition according to the present invention and further improving the applicability to hair, skin, etc. Among these, 2-ethylhexanoic acid is preferred as the fatty acid, from the viewpoint of further improving the foaming ability and foam stability of the foamable composition according to the present invention and further improving the applicability to hair, skin, etc.

[0030] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and further improving the applicability to hair, skin, etc., examples of vegetable oils that can be used include soybean oil, rice germ oil, rice bran oil, jojoba oil, avocado oil, almond oil, olive oil, cacao butter, sesame oil, persic oil, castor oil, coconut oil, safflower oil, eucalyptus oil, rapeseed oil, and oils obtained by hydrogenating these oils that are liquid at 25° C. However, in this specification, the vegetable oils exclude those that correspond to the ester oils and fatty acids.

[0031] Examples of mineral oils that can be used, from the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention and further improving the applicability to hair, skin, etc., include distillate oils obtained by atmospheric distillation of paraffinic crude oil, intermediate crude oil, or naphthenic crude oil, or by vacuum distillation of residual oil from atmospheric distillation, and refined oils obtained by refining these oils according to conventional methods (e.g., solvent-refined oil, hydrogenated refined oil, dewaxed oil, clay-treated oil, etc.). However, in this specification, the mineral oils mentioned above exclude those that fall under the category of hydrocarbon oils.

[0032] The water-immiscible solvent (B1) is preferably immiscible with water at 25°C, from the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention. As used herein, the term "immiscible with water" refers to a proportion at which the substance does not form a solution with water.

[0033] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, the content of the water-immiscible solvent (B1) in the organic solvent (B) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and preferably 100% by mass or less.

[0034] The foamable composition of the present invention is -1From the viewpoint of further improving the foaming properties and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the applyability to hair, skin, etc., the shear viscosity at 22.0 mPa·s or less is preferably 20.0 mPa·s or less, even more preferably 18.0 mPa·s or less, even more preferably 16.0 mPa·s or less, even more preferably 15.0 mPa·s or less, and even more preferably 14.0 mPa·s or less. The lower limit of the shear viscosity is not particularly limited, but is, for example, 0.1 mPa·s or more, and may be 0.5 mPa·s or more, 1.0 mPa·s or more, 2.0 mPa·s or more, or 2.5 mPa·s or more. 25℃, shear rate 500 s -1 The details of the method for measuring the shear viscosity are as described in the Examples below.

[0035] The content of the foaming agent (A) in the foamable composition according to the present invention is, from the viewpoint of further improving the foamability and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the durability and water resistance of the coating film obtained from the foamable composition according to the present invention, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, even more preferably 4.0% by mass or more, even more preferably 6.0% by mass or more, even more preferably 8.0% by mass or more, and from the viewpoint of further improving the application to hair, skin, etc., preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, even more preferably 20% by mass or less, even more preferably 18% by mass or less, even more preferably 15% by mass or less, even more preferably 12% by mass or less.

[0036] From the viewpoint of further improving the application property to hair, skin, etc., the content of the organic solvent (B) in the foamable composition according to the present invention is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 82% by mass or more, even more preferably 85% by mass or more, and even more preferably 88% by mass or more, when the total amount of the foamable composition is taken as 100% by mass. From the viewpoint of further improving the durability and water resistance of a coating film obtained from the functional composition, the content is preferably 99.99% by mass or less, more preferably 99.95% by mass or less, even more preferably 99.9% by mass or less, even more preferably 99.7% by mass or less, even more preferably 99.5% by mass or less, even more preferably 99.0% by mass or less, even more preferably 98.0% by mass or less, even more preferably 97.0% by mass or less, even more preferably 96.0% by mass or less, even more preferably 94.0% by mass or less, and even more preferably 92.0% by mass or less.

[0037] The mass ratio ((A) / (B)) of the content of foaming agent (A) to the content of organic solvent (B) in the foamable composition according to the present invention is preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.03 or more, even more preferably 0.05 or more, and even more preferably 0.08 or more, from the viewpoint of further improving the foamability and foam stability of the foamable composition according to the present invention, and from the viewpoint of further improving the durability and water resistance of a coating film obtained from the foamable composition according to the present invention; and is preferably 1 or less, more preferably 0.5 or less, even more preferably 0.3 or less, even more preferably 0.2 or less, and even more preferably 0.15 or less, from the viewpoint of further improving the applyability to hair, skin, etc.

[0038] The content of water in the foamable composition according to the present invention is preferably less than 50% by mass, more preferably less than 25% by mass, even more preferably less than 10% by mass, even more preferably less than 5% by mass, even more preferably less than 1% by mass, even more preferably less than 0.1% by mass, even more preferably less than 0.01% by mass, when the total amount of the foamable composition is taken as 100% by mass, from the viewpoint of further improving the foamability and foam stability of the foamable composition according to the present invention, further improving the durability and water resistance of the coating film obtained from the foamable composition according to the present invention, and further improving the applicability to hair, skin, etc. It is preferable that the foamable composition according to the present invention is substantially free of water. In this specification, "substantially free of water" means that it is not intentionally added, and does not exclude the presence of a small amount of water as an impurity.

[0039] The foamable composition according to the present invention can be used, for example, in all cosmetics that utilize foam formation. In this specification, "cosmetics that utilize foam formation" refers to products that are used by foaming, such as perfumes, cosmetics, skin care products, and toiletry products that come into direct contact with the human body; and household products such as laundry detergents, household detergents, fabric softeners, insecticides, office glue, paints, air fresheners, and pet shampoos.

[0040] The foamable composition of the present invention may contain, as ingredients other than the foaming agent (A) and the organic solvent (B), ingredients used depending on the type of cosmetic product, as appropriate, to the extent that the effects of the present invention are not impaired. Examples of such ingredients include sugars, alcohols, vitamins, amino acids, UV absorbers, oils, water-soluble polymers, thickeners, neutralizing agents, pH adjusters, disinfectants, anti-inflammatory agents, preservatives, colorants, chelating agents, whitening agents, blood circulation promoters, cooling agents, antiperspirants, insect repellents, physiologically active ingredients, salts, moisturizers, antioxidants, fragrances, plant extracts, and pharmaceuticals (excluding those corresponding to the foaming agent (A) and the organic solvent (B)).

[0041] The foamable composition according to the present invention may be in the form of, for example, a liquid, an emulsion, a cream, a paste, a gel, etc. The foamable composition according to the present invention can also be used as a concentrate for, for example, a spray, a mousse, etc.

[0042] From the viewpoint of further improving the foaming properties and foam stability of the foamable composition of the present invention, and from the viewpoint of further improving the durability and water resistance of the coating film obtained from the foamable composition of the present invention, the total content of the foaming agent (A) and the organic solvent (B) in the foamable composition of the present invention is, when the total amount of the foamable composition is taken as 100% by mass, preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, and preferably 100% by mass or less.

[0043] The contents of components other than the foaming agent (A) and the organic solvent (B) in the foamable composition according to the present invention are not particularly limited, as they are determined depending on the type of cosmetic product, and can be appropriately set based on various publicly known information.

[0044] There are no particular limitations on the method for producing the foamable composition of the present invention, and it can be produced, for example, by mixing the components in a known device.

[0045] (Process (X)) The foaming method of the present invention includes a step (X) of mixing the foamable composition of the present invention with a gas to cause foaming. An example of a method for foaming by mixing a foamable composition and a gas is a method using a foam dispenser. In the method using a foam dispenser, the foamable composition is filled into the foam dispenser, and the filled foamable composition is mixed with a gas such as air inside the dispenser to generate foam, and the foam thus generated passes through an internal flow path of the foam dispenser and is discharged from a discharge port formed in a discharge head. The internal flow path (foam dispensing mechanism) of the foam dispensing container preferably has a porous body through which foam passes, which allows step (Y) and step (X) to be carried out simultaneously or successively using the foam dispensing container.

[0046] Any foam-dispensing container can be used as long as the filled foamable composition can be mixed with a gas such as air inside the container and can be discharged as foam. Examples include a pump foamer container in which, when the pump head is pressed, the cylinder of the air chamber and the cylinder of the foamable composition are pressurized, mixing the air and the foamable composition and discharging the foam as a foam; a squeeze foamer container in which, when the body of the container that can be deformed by pressure is pressed, the container deforms and discharges the foam; and a trigger spray container that is used by pressing the head of a cap equipped with a pump mechanism with a finger.

[0047] As the foam dispensing container, a non-gas type foam dispensing container is preferred from the viewpoint of ease of recycling and environmental friendliness since no propellant is used. In this specification, a non-gas type foam dispensing container refers to a non-aerosol type foam dispensing container other than an aerosol type that uses a propellant, and refers to a container that can dispense a foam by mixing the composition filled in the dispensing container with air. Specific examples include pump foamer containers, squeeze foamer containers, trigger spray containers, etc.

[0048] (Process (Y)) The foaming method of the present invention includes a step (Y) of micronizing the foam using a porous body. In the foaming method according to the present invention, step (X) and step (Y) may be carried out simultaneously, or step (X) may be carried out first and then step (Y).

[0049] As the porous body, from the viewpoint of further improving foaming properties, a porous membrane body such as a mesh-shaped, sponge-shaped or sintered body is preferred, and a mesh-shaped porous membrane body is more preferred. The material of the porous body is not particularly limited, but from the viewpoint of easily forming a porous shape, it is preferably made of a thermoplastic resin. As the thermoplastic resin, a resin excellent in strength, heat resistance, and chemical resistance is preferred, and examples thereof include polyamide, polyester, polyolefin, fluororesin, and silicone resin.

[0050] From the viewpoint of further improving foamability, the opening ratio of the porous body is preferably 30% or more, more preferably 35% or more, even more preferably 38% or more, even more preferably 40% or more, and even more preferably 42% or more, and from the same viewpoint, it is preferably 80% or less, more preferably 70% or less, even more preferably 60% or less, and even more preferably 55% or less. The opening ratio of the porous body can be calculated from the total area of ​​the openings relative to the total surface area of ​​the porous body. Opening rate (%) = (total area of ​​openings) / (total surface area of ​​porous body) × 100

[0051] From the viewpoint of further improving foamability, the opening diameter of the porous body is preferably 70 μm or more, more preferably 100 μm or more, even more preferably 120 μm or more, even more preferably 140 μm or more, even more preferably 150 μm or more, and even more preferably 168 μm or more, and from the same viewpoint, it is preferably 1000 μm or less, more preferably 500 μm or less, even more preferably 400 μm or less, and even more preferably 350 μm or less. For example, when the porous body has a lattice-like mesh shape, the opening diameter of the porous body is the distance between adjacent wires constituting the mesh, i.e., the length of one side of an opening. When the opening of the porous body is circular, the opening diameter of the porous body is the diameter of the opening.

[0052] The foamed composition obtained through the steps (X) and (Y) can be used by applying it to an object such as hair or skin.

[0053] [Goods] The article of the present invention comprises a foam-dispensing container and a foamable composition contained in the foam-dispensing container, wherein the foamable composition comprises a foaming agent (A) and an organic solvent (B) whose dynamic surface tension begins to decrease within 60,000 ms when measured using the following measurement method 1, and the foam-dispensing mechanism of the foam-dispensing container comprises a porous body. (Measurement method 1) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, the dynamic surface tensions of the foaming agent (A) solution and the organic solvent (B) alone are measured at 25°C using a maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time (ms) at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time at which the dynamic surface tension begins to decrease. According to the article of the present invention, the foamable composition is mixed with a gas such as air using a foam-dispensing container to foam the foamable composition, and the foam is then discharged using a foam-dispensing mechanism including a porous body, thereby making the foam finer. The article of the present invention contains the foamable composition of the present invention in a foam-dispensing container, and using the foam-dispensing container, the foamable composition and gas are mixed and foamed, while the foam is refined by a foam-dispensing mechanism including a porous body, thereby achieving the same effect as the foaming method of the present invention.

[0054] The preferred embodiments of the foamable composition are the same as the preferred embodiments of the foamable composition in the foaming method of the present invention described above, and the preferred embodiments of the foam-dispensing container are the same as the preferred embodiments of the foam-dispensing container in the foaming method of the present invention described above.

[0055] Specific examples of the article of the present invention include pump foamer formulations, squeeze foamer formulations, trigger spray formulations, etc. Applications of these formulations include perfumes, cosmetics, skin care products, toiletries, laundry detergents, household detergents, fabric softeners, insecticides, office glues, paints, air fresheners, pet shampoos, etc.

[0056] In addition to the above-described embodiments, the present invention also discloses the following embodiments.

[0057] <1> A step (X) of mixing a foamable composition containing a foaming agent (A) and an organic solvent (B), the foaming composition having a dynamic surface tension decrease time of 60,000 ms or less as measured by the following measurement method 1, with a gas to foam the composition; A foaming method comprising: a step (Y) of micronizing the foam using a porous body. (Measurement method 1) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, the dynamic surface tensions of the foaming agent (A) solution and the organic solvent (B) alone are measured at 25°C using a maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time (ms) at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time at which the dynamic surface tension begins to decrease. <2> The time when the dynamic surface tension of the foaming agent (A) begins to decrease as measured by Measurement Method 1 is preferably 10,000 ms or less, more preferably 6,000 ms or less, even more preferably 3,000 ms or less, even more preferably less than 1,000 ms, even more preferably 800 ms or less, even more preferably 600 ms or less, even more preferably 500 ms or less, even more preferably 250 ms or less, even more preferably 200 ms or less, even more preferably 150 ms or less, even more preferably 100 ms or less, even more preferably 70 ms or less, even more preferably 60 ms or less, and may be 1 ms or more, or 5 ms or more. <1> The foaming method described in <3> The foaming agent (A) has a static surface tension reduction amount, measured by the following measurement method 2, of preferably 0.5 mN / m or more, more preferably 0.7 mN / m or more, even more preferably 1.0 mN / m or more, even more preferably 1.5 mN / m or more, even more preferably 1.7 mN / m or more, even more preferably 1.8 mN / m or more, even more preferably 2.0 mN / m or more, and may be 10.0 mN / m or less, 7.0 mN / m or less, 5.0 mN / m or less, 3.5 mN / m or less, or 3.0 mN / m or less. <1> or <2> The foaming method described in (Measurement method 2) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, a ring is pulled up at a speed of 1 mm / min by the Du Nouy method for the foaming agent (A) solution and the organic solvent (B) alone, and the static surface tension at 25°C is measured for each. The value obtained by subtracting the static surface tension of the foaming agent (A) solution from the static surface tension of the organic solvent (B) alone is defined as the decrease in static surface tension (mN / m). <4> The foaming agent (A) contains a silicone (A1), <1> ~ <3> The foaming method according to any one of the above. <5> The silicone (A1) preferably comprises at least one selected from the group consisting of trimethylsiloxysilicate, phenylpropyldimethylsiloxysilicate, fluorine-modified alkyldimethylsiloxysilicate, crosspolymers of these siloxysilicates crosslinked with dimethiconol or the like, polydimethylsiloxane, polyhydromethylsiloxane, hydrosilyl-modified silicone, polyether-modified silicone, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, carbinol-modified silicone, phenyl-modified silicone, polyglycerin-modified silicone, higher fatty acid ester-modified silicone, polysiloxane betaine, and polysilicone-9, and more preferably trimethylsiloxysilicate. The composition preferably contains at least one selected from the group consisting of silicic acid, polydimethylsiloxane, polyether-modified silicone, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, carbinol-modified silicone, and phenyl-modified silicone, and more preferably contains at least one selected from the group consisting of trimethylsiloxysilicate, polydimethylsiloxane, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, and carbinol-modified silicone, and even more preferably contains at least one selected from the group consisting of trimethylsiloxysilicate, polydimethylsiloxane, polyether-modified silicone, carboxy-modified silicone, and amino-modified silicone, <1> ~ <4> The foaming method according to any one of the above. <6> The content of the silicone (A1) in the foaming agent (A) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and preferably 100% by mass or less. <1> ~ <5> The foaming method according to any one of the above. <7> The static surface tension of the organic solvent (B) at 25°C measured by the Du Nouy method is preferably 18 mN / m or more, more preferably 22 mN / m or more, more preferably 24 mN / m or more, and is preferably 35 mN / m or less, more preferably 30 mN / m or less, more preferably 28 mN / m or less. <1> ~ <6> The foaming method according to any one of the above. <8> The organic solvent (B) was heated at 25°C and a shear rate of 500 s -1 the shear viscosity at 2000 kJ / s is preferably 40 mPa·s or less, more preferably 32 mPa·s or less, more preferably 13 mPa·s or less, more preferably 11 mPa·s or less, and is preferably 0.5 mPa·s or more, more preferably 1.5 mPa·s or more, more preferably 2.5 mPa·s or more, more preferably 3.0 mPa·s or more; <1> ~ <7> The foaming method according to any one of the above. <9> The organic solvent (B) has a carbon number of preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, even more preferably 4 or more, even more preferably 5 or more, even more preferably 6 or more, even more preferably 8 or more, and preferably 30 or less, more preferably 25 or less, even more preferably 22 or less, even more preferably 20 or less, even more preferably 19 or less, even more preferably 18 or less. <1> ~ <8> The foaming method according to any one of the above. <10> The organic solvent (B) contains at least one water-immiscible solvent (B1) selected from the group consisting of hydrocarbon oils, ester oils, and fatty acids. <1> ~ <9> The foaming method according to any one of the above. <11> The hydrocarbon oil preferably comprises at least one selected from the group consisting of α-olefin oligomer, liquid paraffin, liquid isoparaffin, liquid ozokerite, squalane, pristane, and squalene, more preferably liquid isoparaffin, even more preferably light liquid isoparaffin, still more preferably at least one selected from the group consisting of isododecane, isohexadecane, and hydrogenated polyisobutene, still more preferably hydrogenated polyisobutene, still more preferably hydrogenated polyisobutene having 8 to 22 carbon atoms, still more preferably hydrogenated polyisobutene having 8 to 18 carbon atoms, and still more preferably hydrogenated polyisobutene having 14 to 18 carbon atoms. <10> The foaming method described in <12> The ester oil is preferably cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, hexyl laurate, isostearyl laurate, butyl myristate, isopropyl myristate, decyl myristate, isotridecyl myristate, isocetyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, isopropyl isostearate, neopenta isodecyl oleate, ethyl oleate, isodecyl oleate, ethyl linoleate, isopropyl linoleate, lanolin acetate, castor oil fatty acid methyl (methyl ricinoleate), glyceryl tri-2-ethylhexanoate, glyceryl caprylate, tri(caprylic / capric)glyceryl, neopentyl glycol di-2-ethylhexanoate, propanediol di(caprylic / capric) and alkyl benzoate (alkyl carbon number 12 to 15), more preferably cetyl 2-ethylhexanoate, 2- Stearyl ethylhexanoate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, hexyl laurate, isostearyl laurate, butyl myristate, isopropyl myristate, decyl myristate, isotridecyl myristate, isocetyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, isopropyl isostearate, isodecyl neopentanoate, glyceryl caprylate, caprylic / capric triglyceride and at least one selected from the group consisting of glyceryl di(2-ethylhexanoate), neopentyl glycol di(caprylic / capric acid)propanediol, and alkyl benzoate (alkyl having 12 to 15 carbon atoms), more preferably at least one selected from the group consisting of isononyl isononanoate, isopropyl myristate, isopropyl palmitate, and 2-ethylhexyl palmitate, and even more preferably at least one selected from the group consisting of isononyl isononanoate and 2-ethylhexyl palmitate. <10> or <11> The foaming method described in <13> The fatty acid preferably includes at least one selected from the group consisting of 2-ethylhexanoic acid, lauric acid, myristic acid, pentadecanoic acid, palmitic acid, palmitoleic acid, margadelic acid, stearic acid, oleic acid, and linoleic acid, and more preferably 2-ethylhexanoic acid. <10> ~ <12> The foaming method according to any one of the above. <14> The content of the water-immiscible solvent (B1) in the organic solvent (B) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and preferably 100% by mass or less. <10> ~ <13> The foaming method according to any one of the above. <15> 25℃, shear rate 500 s -1 is preferably 22.0 mPa·s or less, more preferably 20.0 mPa·s or less, even more preferably 18.0 mPa·s or less, even more preferably 16.0 mPa·s or less, even more preferably 15.0 mPa·s or less, and even more preferably 14.0 mPa·s or less, and may be 0.1 mPa·s or more, 0.5 mPa·s or more, 1.0 mPa·s or more, 2.0 mPa·s or more, or 2.5 mPa·s or more; <1> ~ <14> The foaming method according to any one of the above. <16> The content of the foaming agent (A) in the foamable composition is, when the total amount of the foamable composition is taken as 100% by mass, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, even more preferably 4.0% by mass or more, even more preferably 6.0% by mass or more, even more preferably 8.0% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, even more preferably 20% by mass or less, even more preferably 18% by mass or less, even more preferably 15% by mass or less, even more preferably 12% by mass or less. <1> ~ <15> The foaming method according to any one of the above. <17> The content of the organic solvent (B) in the foamable composition is, when the total amount of the foamable composition is 100 mass%, preferably 50 mass% or more, more preferably 60 mass% or more, even more preferably 70 mass% or more, even more preferably 80 mass% or more, even more preferably 82 mass% or more, even more preferably 85 mass% or more, and even more preferably 88 mass% or more, and is preferably 99.99 mass% or less, more preferably 99.95 mass% or less, even more preferably 99.9 mass% or less, even more preferably 99.7 mass% or less, even more preferably 99.5 mass% or less, even more preferably 99.0 mass% or less, even more preferably 98.0 mass% or less, even more preferably 97.0 mass% or less, even more preferably 96.0 mass% or less, even more preferably 94.0 mass% or less, and even more preferably 92.0 mass% or less. <1> ~ <16> The foaming method according to any one of the above. <18> The mass ratio ((A) / (B)) of the content of the foaming agent (A) to the content of the organic solvent (B) in the foamable composition is preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.08 or more, and is preferably 1 or less, more preferably 0.5 or less, even more preferably 0.3 or less, even more preferably 0.2 or less, even more preferably 0.15 or less. <1> ~ <17> The foaming method according to any one of the above. <19> The opening ratio of the porous body is preferably 30% or more, more preferably 35% or more, even more preferably 38% or more, even more preferably 40% or more, even more preferably 42% or more, and is preferably 80% or less, more preferably 70% or less, even more preferably 60% or less, even more preferably 55% or less. <1> ~ <18> The foaming method according to any one of the above. <20> The opening diameter of the porous body is preferably 70 μm or more, more preferably 100 μm or more, even more preferably 120 μm or more, even more preferably 140 μm or more, even more preferably 150 μm or more, even more preferably 168 μm or more, and is preferably 1000 μm or less, more preferably 500 μm or less, even more preferably 400 μm or less, even more preferably 350 μm or less. <1> ~ <19> The foaming method according to any one of the above. <21> The content of water in the foamable composition is preferably less than 50% by mass, more preferably less than 25% by mass, even more preferably less than 10% by mass, even more preferably less than 5% by mass, even more preferably less than 1% by mass, even more preferably less than 0.1% by mass, and even more preferably less than 0.01% by mass, when the total amount of the foamable composition is 100% by mass, and it is further preferred that the foamable composition is substantially free of water. <1> ~ <20> The foaming method according to any one of the above. <22> The total content of the foaming agent (A) and the organic solvent (B) in the foamable composition is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, and preferably 100% by mass or less, when the total amount of the foamable composition is 100% by mass. <1> ~ <21> The foaming method according to any one of the above. <23> In the step (X), the foamable composition and the gas are mixed and foamed using a foam discharge container. <1> ~ <22> The foaming method according to any one of the above. <24> The foam discharge container is a pump foamer container, a squeeze foamer container, or a trigger spray container. <23> The foaming method described in <25> The porous body is preferably a mesh-shaped, sponge-shaped or sintered porous membrane body, more preferably a mesh-shaped porous membrane body. <1> ~ <24> The foaming method according to any one of the above. <26> The material of the porous body is preferably polyamide, polyester, polyolefin, fluororesin, or silicone resin. <1> ~ <25> The foaming method according to any one of the above. <27> An article comprising a foam dispenser and a foamable composition within the foam dispenser, The foamable composition contains a foaming agent (A) and an organic solvent (B), and the time required for the dynamic surface tension to begin to decrease is within 60,000 ms, as measured by the following measurement method 1; The foam dispensing mechanism of the foam dispensing container is an article including a porous body. (Measurement method 1) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, the dynamic surface tensions of the foaming agent (A) solution and the organic solvent (B) alone are measured at 25°C using a maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time (ms) at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time at which the dynamic surface tension begins to decrease. <28> The time when the dynamic surface tension of the foaming agent (A) begins to decrease as measured by Measurement Method 1 is preferably 10,000 ms or less, more preferably 6,000 ms or less, even more preferably 3,000 ms or less, even more preferably less than 1,000 ms, even more preferably 800 ms or less, even more preferably 600 ms or less, even more preferably 500 ms or less, even more preferably 250 ms or less, even more preferably 200 ms or less, even more preferably 150 ms or less, even more preferably 100 ms or less, even more preferably 70 ms or less, even more preferably 60 ms or less, and may be 1 ms or more, or 5 ms or more. <27> The article described in <29> The foaming agent (A) has a static surface tension reduction amount, measured by the following measurement method 2, of preferably 0.5 mN / m or more, more preferably 0.7 mN / m or more, even more preferably 1.0 mN / m or more, even more preferably 1.5 mN / m or more, even more preferably 1.7 mN / m or more, even more preferably 1.8 mN / m or more, even more preferably 2.0 mN / m or more, and may be 10.0 mN / m or less, 7.0 mN / m or less, 5.0 mN / m or less, 3.5 mN / m or less, or 3.0 mN / m or less. <27> or <28> The article described in (Measurement method 2) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, a ring is pulled up at a speed of 1 mm / min by the Du Nouy method for the foaming agent (A) solution and the organic solvent (B) alone, and the static surface tension at 25°C is measured for each. The value obtained by subtracting the static surface tension of the foaming agent (A) solution from the static surface tension of the organic solvent (B) alone is defined as the decrease in static surface tension (mN / m). <30> The foaming agent (A) contains a silicone (A1), <27> ~ <29> An article according to any one of the preceding items. <31> The silicone (A1) preferably comprises at least one selected from the group consisting of trimethylsiloxysilicate, phenylpropyldimethylsiloxysilicate, fluorine-modified alkyldimethylsiloxysilicate, crosspolymers of these siloxysilicates crosslinked with dimethiconol or the like, polydimethylsiloxane, polyhydromethylsiloxane, hydrosilyl-modified silicone, polyether-modified silicone, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, carbinol-modified silicone, phenyl-modified silicone, polyglycerin-modified silicone, higher fatty acid ester-modified silicone, polysiloxane betaine, and polysilicone-9, and more preferably trimethylsiloxysilicate. The composition preferably contains at least one selected from the group consisting of silicic acid, polydimethylsiloxane, polyether-modified silicone, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, carbinol-modified silicone, and phenyl-modified silicone, and more preferably contains at least one selected from the group consisting of trimethylsiloxysilicate, polydimethylsiloxane, carboxy-modified silicone, amino-modified silicone, fluoroalkyl-modified silicone, and carbinol-modified silicone, and even more preferably contains at least one selected from the group consisting of trimethylsiloxysilicate, polydimethylsiloxane, polyether-modified silicone, carboxy-modified silicone, and amino-modified silicone, <27> ~ <30> An article according to any one of the preceding items. <32> The content of the silicone (A1) in the foaming agent (A) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and preferably 100% by mass or less. <27> ~ <31> An article according to any one of the preceding items. <33> The static surface tension of the organic solvent (B) at 25°C measured by the Du Nouy method is preferably 18 mN / m or more, more preferably 22 mN / m or more, more preferably 24 mN / m or more, and is preferably 35 mN / m or less, more preferably 30 mN / m or less, more preferably 28 mN / m or less. <27> ~ <32> An article according to any one of the preceding items. <34> The organic solvent (B) was heated at 25°C and a shear rate of 500 s -1 the shear viscosity at 2000 kJ / s is preferably 40 mPa·s or less, more preferably 32 mPa·s or less, more preferably 13 mPa·s or less, more preferably 11 mPa·s or less, and is preferably 0.5 mPa·s or more, more preferably 1.5 mPa·s or more, more preferably 2.5 mPa·s or more, more preferably 3.0 mPa·s or more; <27> ~ <33> An article according to any one of the preceding items. <35> The organic solvent (B) has a carbon number of preferably 1 or more, more preferably 2 or more, even more preferably 3 or more, even more preferably 4 or more, even more preferably 5 or more, even more preferably 6 or more, even more preferably 8 or more, and preferably 30 or less, more preferably 25 or less, even more preferably 22 or less, even more preferably 20 or less, even more preferably 19 or less, even more preferably 18 or less. <27> ~ <34> An article according to any one of the preceding items. <36> The organic solvent (B) contains at least one water-immiscible solvent (B1) selected from the group consisting of hydrocarbon oils, ester oils, and fatty acids. <27> ~ <35> An article according to any one of the preceding items. <37> The hydrocarbon oil preferably comprises at least one selected from the group consisting of α-olefin oligomer, liquid paraffin, liquid isoparaffin, liquid ozokerite, squalane, pristane, and squalene, more preferably liquid isoparaffin, even more preferably light liquid isoparaffin, still more preferably at least one selected from the group consisting of isododecane, isohexadecane, and hydrogenated polyisobutene, still more preferably hydrogenated polyisobutene, still more preferably hydrogenated polyisobutene having 8 to 22 carbon atoms, still more preferably hydrogenated polyisobutene having 8 to 18 carbon atoms, and still more preferably hydrogenated polyisobutene having 14 to 18 carbon atoms. <36> The article described in <38> The ester oil is preferably cetyl 2-ethylhexanoate, stearyl 2-ethylhexanoate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, hexyl laurate, isostearyl laurate, butyl myristate, isopropyl myristate, decyl myristate, isotridecyl myristate, isocetyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, isopropyl isostearate, neopenta isodecyl oleate, ethyl oleate, isodecyl oleate, ethyl linoleate, isopropyl linoleate, lanolin acetate, castor oil fatty acid methyl (methyl ricinoleate), glyceryl tri-2-ethylhexanoate, glyceryl caprylate, tri(caprylic / capric)glyceryl, neopentyl glycol di-2-ethylhexanoate, propanediol di(caprylic / capric) and alkyl benzoate (alkyl carbon number 12 to 15), more preferably cetyl 2-ethylhexanoate, 2-ethylhexanoate Stearyl ethylhexanoate, isononyl isononanoate, 2-ethylhexyl isononanoate, isodecyl isononanoate, isotridecyl isononanoate, hexyl laurate, isostearyl laurate, butyl myristate, isopropyl myristate, decyl myristate, isotridecyl myristate, isocetyl myristate, isopropyl palmitate, 2-ethylhexyl palmitate, 2-ethylhexyl stearate, isopropyl isostearate, isodecyl neopentanoate, glyceryl caprylate, caprylic / capric triglyceride at least one selected from the group consisting of glyceryl di(caprylate / caprate), neopentyl glycol di-2-ethylhexanoate, dicaprylic / capric acid propanediol, and alkyl benzoate (alkyl having 12 to 15 carbon atoms), more preferably at least one selected from the group consisting of isononyl isononanoate, isopropyl myristate, isopropyl palmitate, and 2-ethylhexyl palmitate, and even more preferably at least one selected from the group consisting of isononyl isononanoate and 2-ethylhexyl palmitate, <36> or <37> The article described in <39> The fatty acid preferably includes at least one selected from the group consisting of 2-ethylhexanoic acid, lauric acid, myristic acid, pentadecanoic acid, palmitic acid, palmitoleic acid, margadelic acid, stearic acid, oleic acid, and linoleic acid, and more preferably 2-ethylhexanoic acid. <36> ~ <38> An article according to any one of the preceding items. <40> The content of the water-immiscible solvent (B1) in the organic solvent (B) is preferably 50% by mass or more, more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, even more preferably 98% by mass or more, and preferably 100% by mass or less. <36> ~ <39> An article according to any one of the preceding items. <41> The foamable composition was subjected to a shear rate of 500 s at 25°C. -1 is preferably 22.0 mPa·s or less, more preferably 20.0 mPa·s or less, even more preferably 18.0 mPa·s or less, even more preferably 16.0 mPa·s or less, even more preferably 15.0 mPa·s or less, and even more preferably 14.0 mPa·s or less, and may be 0.1 mPa·s or more, 0.5 mPa·s or more, 1.0 mPa·s or more, 2.0 mPa·s or more, or 2.5 mPa·s or more; <36> ~ <40> An article according to any one of the preceding items. <42> The content of the foaming agent (A) in the foamable composition is, when the total amount of the foamable composition is taken as 100% by mass, preferably 0.01% by mass or more, more preferably 0.05% by mass or more, even more preferably 0.1% by mass or more, even more preferably 0.3% by mass or more, even more preferably 0.5% by mass or more, even more preferably 1.0% by mass or more, even more preferably 2.0% by mass or more, even more preferably 3.0% by mass or more, even more preferably 4.0% by mass or more, even more preferably 6.0% by mass or more, even more preferably 8.0% by mass or more, and preferably 50% by mass or less, more preferably 40% by mass or less, even more preferably 30% by mass or less, even more preferably 20% by mass or less, even more preferably 18% by mass or less, even more preferably 15% by mass or less, even more preferably 12% by mass or less. <27> ~ <41> An article according to any one of the preceding items. <43> The content of the organic solvent (B) in the foamable composition is, when the total amount of the foamable composition is 100 mass%, preferably 50 mass% or more, more preferably 60 mass% or more, even more preferably 70 mass% or more, even more preferably 80 mass% or more, even more preferably 82 mass% or more, even more preferably 85 mass% or more, and even more preferably 88 mass% or more, and is preferably 99.99 mass% or less, more preferably 99.95 mass% or less, even more preferably 99.9 mass% or less, even more preferably 99.7 mass% or less, even more preferably 99.5 mass% or less, even more preferably 99.0 mass% or less, even more preferably 98.0 mass% or less, even more preferably 97.0 mass% or less, even more preferably 96.0 mass% or less, even more preferably 94.0 mass% or less, and even more preferably 92.0 mass% or less. <27> ~ <42> An article according to any one of the preceding items. <44> The mass ratio ((A) / (B)) of the content of the foaming agent (A) to the content of the organic solvent (B) in the foamable composition is preferably 0.001 or more, more preferably 0.01 or more, even more preferably 0.03 or more, even more preferably 0.05 or more, even more preferably 0.08 or more, and is preferably 1 or less, more preferably 0.5 or less, even more preferably 0.3 or less, even more preferably 0.2 or less, even more preferably 0.15 or less. <27> ~ <43> An article according to any one of the preceding items. <45> The opening ratio of the porous body is preferably 30% or more, more preferably 35% or more, even more preferably 38% or more, even more preferably 40% or more, even more preferably 42% or more, and is preferably 80% or less, more preferably 70% or less, even more preferably 60% or less, even more preferably 55% or less. <27> ~ <44> An article according to any one of the preceding items. <46> The opening diameter of the porous body is preferably 70 μm or more, more preferably 100 μm or more, even more preferably 120 μm or more, even more preferably 140 μm or more, even more preferably 150 μm or more, even more preferably 168 μm or more, and is preferably 1000 μm or less, more preferably 500 μm or less, even more preferably 400 μm or less, even more preferably 350 μm or less. <27> ~ <45> An article according to any one of the preceding items. <47> The content of water in the foamable composition is preferably less than 50% by mass, more preferably less than 25% by mass, even more preferably less than 10% by mass, even more preferably less than 5% by mass, even more preferably less than 1% by mass, even more preferably less than 0.1% by mass, and even more preferably less than 0.01% by mass, when the total amount of the foamable composition is 100% by mass, and it is further preferred that the foamable composition is substantially free of water. <27> ~ <46> An article according to any one of the preceding items. <48> The total content of the foaming agent (A) and the organic solvent (B) in the foamable composition is preferably 30% by mass or more, more preferably 40% by mass or more, even more preferably 50% by mass or more, even more preferably 60% by mass or more, even more preferably 70% by mass or more, even more preferably 80% by mass or more, even more preferably 90% by mass or more, even more preferably 95% by mass or more, and preferably 100% by mass or less, when the total amount of the foamable composition is 100% by mass. <27> ~ <47> An article according to any one of the preceding items. <49> The foam dispenser is a non-gas type foam dispenser. <27> ~ <48> An article according to any one of the preceding items. <50> The foam discharge container is a pump foamer container, a squeeze foamer container, or a trigger spray container. <49> The article described in <51> The porous body is preferably a mesh-shaped, sponge-shaped or sintered porous membrane body, more preferably a mesh-shaped porous membrane body. <27> ~ <50> An article according to any one of the preceding items. <52> The material of the porous body is preferably polyamide, polyester, polyolefin, fluororesin, or silicone resin. <27> ~ <51> An article according to any one of the preceding items. [Example]

[0058] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. In the following examples and comparative examples, "parts" and "%" mean "parts by mass" and "% by mass" unless otherwise specified.

[0059] In the examples and comparative examples, the following foaming agents and organic solvents were used.

[0060] Foaming agent (silicone) Unmodified silicone 1 (trimethylsiloxysilicate, manufactured by Wacker Asahi Kasei Silicone Co., Ltd., BELSIL (registered trademark) TMS803) Unmodified silicone 2 (polydimethylsiloxane, manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF-96-20CS) Polyether-modified silicone 1 (functional group: polyoxyalkylene group, PEG-9 polydimethylsiloxyethyl dimethicone, manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF-6028) Polyether-modified silicone 2 (functional group: polyoxyalkylene group, PEG-3 dimethicone, manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF-6015) Carboxy-modified silicone 1 (functional group: carboxy group, biscarboxydecyl dimethicone, manufactured by Momentive, product name: Silsoft) TM INX Fluid) Amino-modified silicone 1 (functional group: amino group, amino-modified silicone, manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF-864) Long-chain alkyl-modified silicone 1 (functional group: alkyl group, long-chain alkyl-modified silicone, manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF-412)

[0061] Organic solvents (Water-immiscible solvent that is liquid at 25°C) Hydrocarbon oil 1 (hydrogenated polyisobutene, manufactured by NOF Corporation, product name: Parleam (registered trademark) 3, carbon number: 12) Hydrocarbon oil 2 (hydrogenated polyisobutene, manufactured by NOF Corporation, product name: Parleam (registered trademark) 4, carbon number: 16) Hydrocarbon oil 3 (hydrogenated polyisobutene, manufactured by NOF Corporation, product name: PARLEAM (registered trademark) EX, carbon number: 20) Hydrocarbon oil 4 (hydrogenated polyisobutene, manufactured by NOF Corporation, product name: Parleam (registered trademark) 6, carbon number: 24) Ester oil 1 (isononyl isononanoate, manufactured by Nisshin Oillio Group, Ltd., product name: Salacos 99, carbon number: 18) Ester oil 2 (2-ethylhexyl palmitate, manufactured by Nisshin Oillio Group, product name: Salacos P-8, carbon number: 24) Fatty acid 1 (2-ethylhexanoic acid, Fujifilm Wako Pure Chemical Industries, carbon number: 8)

[0062] The various physical properties of the foaming agent were measured by the following methods.

[0063] (1) Dynamic surface tension of foaming agent A foaming agent solution with a concentration of 0.5% by mass was prepared by dissolving the foaming agent in an organic solvent. The dynamic surface tension of the resulting foaming agent solution and the organic solvent alone was then measured at 25°C using a KRUSS bubble pressure dynamic surface tensiometer (product name: BP100) using the maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time (ms) at which the dynamic surface tension began to decrease was calculated as the time at which the value obtained by subtracting the dynamic surface tension of the foaming agent solution from the dynamic surface tension of the organic solvent alone first reached 0.3 mN / m or greater. Here, the organic solvent used was the same type and composition as the organic solvent used in each of the Examples and Comparative Examples. The glass capillaries were treated by immersing them in Silanization solution I (Sigma-Aldrich) for 12 hours or more, and the tips were lightly filed before use.

[0064] (2) Static surface tension of the foaming agent A foaming agent solution with a concentration of 0.5% by mass was prepared by dissolving the foaming agent in an organic solvent. Next, the static surface tensions of the foaming agent solution and the organic solvent alone were measured at 25°C using a KRUSS surface tensiometer (product name: K100) by pulling up a ring at a rate of 1 mm / min using the Du Nouy method. The static surface tension of the foaming agent solution was then subtracted from the static surface tension of the organic solvent alone to calculate the decrease in static surface tension (mN / m). Here, the organic solvent used was the same type and composition as the organic solvent used in each of the Examples and Comparative Examples.

[0065] The physical properties of the organic solvent (B) were measured by the following methods. (1) Surface tension of organic solvent (B) Using a surface tensiometer (product name: K100) manufactured by KRUSS, the ring was pulled up at a speed of 1 mm / min by the Du Nouy method, and the static surface tension at 25°C was measured.

[0066] (2) Shear viscosity of organic solvent (B) Using a rheometer, under the following conditions: 25°C, shear rate 500 s -1 The shear viscosity was measured. Equipment: MCR-302 (Anton Paar) Jig: CP50-1 (Diameter: 50 mm) Temperature: 25℃ Shear rate: 500 s -1

[0067] Example 1 Unmodified silicone 1 (1 g) as a foaming agent and hydrocarbon oil 1 (19 g) as an organic solvent were added to a 30 mL container, and the mixture was shaken and mixed for 10 minutes to obtain a foamable composition.

[0068] Examples 2 to 19 and Comparative Example 1 Each foamable composition was prepared in the same manner as in Example 1, except that the types of foaming agent and organic solvent were changed to those shown in Table 1, and the foaming agent concentration was changed to the value shown in Table 1.

[0069] [Physical property measurement and evaluation] The foamable compositions obtained in the examples and comparative examples were subjected to the following physical property measurements and evaluations. The evaluation results are shown in Table 1.

[0070] <Shear viscosity of foamable composition> Using a rheometer, under the following conditions: 25°C, shear rate 500 s -1 The shear viscosity of the foamable composition was measured. Equipment: MCR-302 (Anton Paar) Jig: CP50-1 (Diameter: 50 mm) Temperature: 25℃ Shear rate: 500 s -1

[0071] <Evaluation of foaming properties> The foamable composition was foamed using a pump foamer container manufactured by Yoshino Kogyosho Co., Ltd. The foam discharge mechanism used was equipped with two nylon porous membranes with a mesh size of 90 / inch (opening diameter: 177 μm, opening rate: 39%). The appearance of the foam produced was then observed, and the foamability of the foamable composition was evaluated based on the following evaluation criteria. (Evaluation criteria) 1: Liquid-like 2: Foam containing many fine bubbles 3: Fine, slightly voluminous foam 4: Fine, voluminous foam 5: Very fine, very voluminous foam

[0072] <Evaluation of foam stability> The foamable composition was foamed using a pump foamer container manufactured by Yoshino Kogyosho Co., Ltd. The foam discharge mechanism used was equipped with two nylon porous membranes with a mesh size of 90 / inch (opening diameter: 177 μm, opening rate: 39%). The time from foam generation to foam disappearance was then measured to evaluate the foam stability of the foamable composition.

[0073] [Table 1]

[0074] Examples 20 to 27 Each evaluation was carried out in the same manner as in Example 2, except that the mesh size of the porous body was changed so that the opening diameter of the porous body placed in the internal flow path of the foam discharge container was changed to the values ​​shown in Table 2. The evaluation results are shown in Table 2.

[0075] Comparative Example 2 Except for not disposing a porous body in the internal flow path of the foam discharge container, the evaluations were carried out in the same manner as in Example 2. The evaluation results are shown in Table 2.

[0076] [Table 2]

[0077] Examples 28 to 30 Each evaluation was performed in the same manner as in Example 24, except that the aperture ratio of the porous body mesh placed in the internal flow path of the foam discharge container was changed to the values ​​shown in Table 3 by changing the aperture ratio of the porous body. The evaluation results are shown in Table 3.

[0078] [Table 3]

[0079] It can be seen from Tables 1 to 3 that the foaming methods of the Examples have better foaming properties than the foaming methods of the Comparative Examples. From the above, it can be seen that the foaming method according to the present invention can improve foaming properties.

[0080] Further, examples of formulations of the foamable composition according to the present invention are shown below. Prescription example 1 Raw material name Amount [mass%] Isopropyl myristate 61.0 Isodecyl neopentanoate 6.5 2-Ethylhexyl isononanoate 7.5 vegetable oil 20.0 Trimethylsiloxysilicate 5.0 [Industrial Applicability]

[0081] According to the present invention, a foaming method and an article with improved foaming properties can be provided.

Claims

1. A step (X) of mixing a foamable composition containing a foaming agent (A) and an organic solvent (B), the foaming composition having a dynamic surface tension that begins to decrease within 60,000 ms as measured by the following measurement method 1, with a gas to foam the composition; A foaming method comprising: a step (Y) of micronizing the foam using a porous body. (Measurement method 1) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution having a concentration of 0.5% by mass. Then, the dynamic surface tensions of the foaming agent (A) solution and the organic solvent (B) alone are measured at 25°C by a maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time (ms) at which the dynamic surface tension begins to decrease.

2. 2. The foaming method according to claim 1, wherein the foaming agent (A) has a static surface tension reduction of 0.5 mN / m or more, as measured by the following measurement method 2. (Measurement method 2) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, a ring is pulled up at a speed of 1 mm / min by the Du Nouy method for the foaming agent (A) solution and the organic solvent (B) alone, and the static surface tension at 25°C is measured for each. The value obtained by subtracting the static surface tension of the foaming agent (A) solution from the static surface tension of the organic solvent (B) alone is defined as the decrease in static surface tension (mN / m).

3. 3. The foaming method according to claim 1, wherein the foaming agent (A) comprises a silicone (A1).

4. 3. The foaming method according to claim 1, wherein the organic solvent (B) comprises at least one water-immiscible solvent (B1) selected from the group consisting of hydrocarbon oils, ester oils, and fatty acids.

5. The foamable composition was heated at 25°C and a shear rate of 500 s －１ 3. The foaming method according to claim 1, wherein the shear viscosity at 22.0 mPa·s or less.

6. 3. The foaming method according to claim 1, wherein the porous body has an opening ratio of 30% or more.

7. 3. The foaming method according to claim 1, wherein the opening diameter of the porous body is 70 μm or more.

8. 3. The foaming method according to claim 1, wherein the foamable composition contains less than 50% by mass of water.

9. An article comprising a foam dispenser and a foamable composition within the foam dispenser, The foamable composition contains a foaming agent (A) and an organic solvent (B), and the time required for the dynamic surface tension to begin to decrease is within 60,000 ms, as measured by the following measurement method 1: The foam dispensing mechanism of the foam dispensing container includes a porous body. (Measurement method 1) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution having a concentration of 0.5% by mass. Then, the dynamic surface tensions of the foaming agent (A) solution and the organic solvent (B) alone are measured at 25°C by a maximum bubble pressure method at bubble generation times of 10 ms to 60,000 ms. The time at which the value obtained by subtracting the dynamic surface tension of the foaming agent (A) solution from the dynamic surface tension of the organic solvent (B) alone becomes 0.3 mN / m or more is defined as the time (ms) at which the dynamic surface tension begins to decrease.

10. The article according to claim 9, wherein the foaming agent (A) has a static surface tension reduction of 0.5 mN / m or more, as measured by the following measurement method 2. (Measurement method 2) The foaming agent (A) is dissolved in the organic solvent (B) to prepare a foaming agent (A) solution with a concentration of 0.5% by mass. Then, a ring is pulled up at a speed of 1 mm / min by the Du Nouy method for the foaming agent (A) solution and the organic solvent (B) alone, and the static surface tension at 25°C is measured for each. The value obtained by subtracting the static surface tension of the foaming agent (A) solution from the static surface tension of the organic solvent (B) alone is defined as the decrease in static surface tension (mN / m).

11. 11. The article of claim 9 or 10, wherein the foaming agent (A) comprises a silicone (A1).

12. 11. The article of claim 9 or 10, wherein the organic solvent (B) comprises at least one water-immiscible solvent (B1) selected from the group consisting of hydrocarbon oils, ester oils, and fatty acids.

13. The foamable composition was heated at 25°C and a shear rate of 500 s －１ 11. The article according to claim 9, having a shear viscosity of 22.0 mPa·s or less.

14. 11. The article of claim 9 or 10, wherein the foamable composition contains less than 50% by weight of water.

15. The article according to claim 9 or 10, wherein the foam dispenser is a non-gas type foam dispenser.

16. The article according to claim 9 or 10, wherein the porous body has an opening ratio of 30% or more.

17. The article according to claim 9 or 10, wherein the foam-dispensing container is a pump foamer container, a squeeze foamer container, or a trigger spray container.