Powder

Abstract

This powder for a scrubbing agent includes 60 mass% or more of a starch, wherein the difference between the heated soluble fraction after heating for 30 minutes at 80°C and the cold water soluble fraction at 25°C is less than 10%.

Description

powder

[0001] The present invention relates to powders.

[0002] Patent Document 1 (JP 2019-942777 A) describes a technology relating to starch-containing materials. The document describes (paragraph 0006) a particulate scrubbing agent containing gelatinized starch and having a degree of gelatinization of 10 to 90% (claim 1) as a technology for providing a scrubbing agent that has an excellent scrubbing sensation, is low-irritation, is stable in blends with detergents, and is easily manufacturable.

[0003] Japanese Patent Application Laid-Open No. 2019-942777

[0004] The inventors have examined the technology described in Patent Document 1 and found that there is room for improvement in terms of making the feel of the scrubbing agent more pleasant to use, even when the particles undergo a heating process when incorporated into the scrubbing agent.

[0005] The present invention provides new materials that can be used in scrubbing agents.

[0006] According to the present invention, there are provided the following powder, scrubbing agent, and methods for producing the same, cleaning method, and massaging method.

[0007] [1] A powder for a scrubbing agent, the powder containing 60% by mass or more of starch, wherein the difference between the amount of heat-soluble fraction after heating at 80°C for 30 minutes and the amount of cold-water-soluble fraction at 25°C is less than 10%. [2] The powder according to [1], wherein the amylose content of the raw starch for the starch is 50% by mass or more. [3] The powder according to [1] or [2], wherein the amount of heat-soluble fraction is 10% or less. [4] The powder according to any one of [1] to [3], wherein the heat swelling degree at 80°C is 6.0 or less. [5] The powder according to any one of [1] to [4], wherein the cold-water swelling degree at 25°C is 5.0 or less. [6] The powder according to any one of [1] to [5], wherein the median diameter is 10 μm or more and 1000 μm or less. [7] The powder according to any one of [1] to [6], wherein the starch comprises high amylose cornstarch. [8] The powder according to [7], wherein the starch further comprises a starch other than the high amylose cornstarch. [9] The powder according to [8], wherein the starch other than the high amylose cornstarch is one or more selected from the group consisting of pea starch, potato starch, and cornstarch.

[10] The powder according to any one of [1] to [9], wherein the degree of gelatinization measured by the β-amylase-pullulanase (BAP) method is less than 10%.

[11] The powder according to any one of [1] to

[10] , which is for use in cosmetics.

[12] The powder according to any one of [1] to

[11] , which is for use in skin cleansing or massage.

[13] A scrubbing agent comprising the powder according to any one of [1] to

[12] .

[14] The scrubbing agent according to

[13] , which is a cosmetic.

[15] The scrubbing agent according to

[13] or

[14] , which is a skin cleanser or massage agent.

[16] A method for producing a scrubbing agent, comprising a step of blending the powder according to any one of [1] to

[12] .

[17] A method for cleansing skin, comprising applying the scrubbing agent according to any one of

[13] to

[15] to the skin and cleaning it.

[18] A method for massaging, comprising applying the scrubbing agent according to any one of

[13] to

[15] to the skin and massaging it.

[0008] Any combination of these configurations and conversion of the present invention between methods, devices, etc. are also valid aspects of the present invention.

[0009] According to the present invention, a new material that can be used as a scrubbing agent can be provided.

[0010] Hereinafter, embodiments of the present invention will be described. Unless otherwise specified, the "to" symbol in a numerical range indicates a range from above to below, and both ends of the range are included. In this embodiment, the composition may contain each component alone or in combination of two or more types.

[0011] (Powder) In this embodiment, the powder is a powder for a scrubbing agent containing 60% by mass or more of starch. The difference between the amount of heat-soluble fraction of the powder after heating at 80°C for 30 minutes and the amount of cold-water-soluble fraction at 25°C is less than 10%. Specifically, the powder is a composition containing 60% by mass or more of starch.

[0012] The powder of this embodiment primarily contains starch, and the difference between the amount of heat-soluble fraction and the amount of cold-water-soluble fraction is within a specific range. Therefore, it can be suitably used in scrubs. Furthermore, when used in scrubs obtained through a heating process, the resulting scrubs can have a favorable feel when used. More specifically, by using the powder of this embodiment, it is possible to obtain a scrub with favorable particle hardness during washing or massaging, and reduced irritation. Furthermore, by using the powder of this embodiment, it is possible to obtain a scrub with sufficient cleansing power and an excellent refreshing feeling after washing. Furthermore, it is possible to obtain a scrub with reduced irritation to the skin, while still providing a massage effect. Below, the components contained in the powder are first described.

[0013] The powder contains 60% by mass or more of starch. The powder may be composed of starch, or may further contain components other than starch. From the viewpoint of ensuring a desirable hardness of the powder when used as a scrubbing agent, the starch content in the powder is 60% by mass or more, preferably 70% by mass or more, more preferably 80% by mass or more, and even more preferably 90% by mass or more, based on the total powder. Furthermore, the starch content in the powder may be 100% by mass or less, for example, 95% by mass or less, or 90% by mass or less, based on the total powder.

[0014] Specific examples of raw starches to be incorporated into the powder include corn starches such as corn starch (regular corn starch), waxy corn starch, and high-amylose corn starch; potato starch; tapioca starch (starch derived from cassava); wheat starch; rice starch; sago starch; sweet potato starch; bean starches such as mung bean starch and pea starch; and processed starches obtained by chemically, physically, or enzymatically processing these. Treatments for processed starches include one or more treatments selected from the group consisting of chemical treatments such as acid treatment, alkali treatment, oxidation treatment, esterification (e.g., acetylation), etherification (e.g., hydroxypropylation), and crosslinking; physical treatments such as heat treatment, gelatinization, moist heat treatment, ball mill treatment, and fine grinding; and enzymatic treatment.

[0015] From the viewpoint of improving the heat resistance of the powder, the amylose content of the raw starch for the starch is preferably 50% by mass or more, more preferably 55% by mass or more, even more preferably 65% ​​by mass or more, and even more preferably 70% by mass or more. The amylose content of the raw starch for the starch is specifically less than 100% by mass, and from the viewpoint of reducing the irritation of the scrubbing agent, it is preferably 95% by mass or less, more preferably 90% by mass or less, and even more preferably 85% by mass or less.

[0016] From the viewpoint of improving the heat resistance of the powder, the starch preferably contains one or more starches selected from the group consisting of high-amylose cornstarch, cornstarch, pea starch, and potato starch, and more preferably contains high-amylose cornstarch. From the viewpoint of improving the heat resistance of the powder, the content of high-amylose cornstarch in the starch is preferably more than 50% by mass, more preferably 55% by mass or more, even more preferably 60% by mass or more, still more preferably 75% by mass or more, or may be 100% by mass, based on the total starch. Furthermore, the content of high-amylose cornstarch in the starch is 100% by mass or less based on the total starch.

[0017] From the viewpoint of improving the heat resistance of the powder, it is also preferable that the starch contains high-amylose cornstarch and further contains starch other than high-amylose cornstarch. From the same viewpoint, the starch other than high-amylose cornstarch is preferably one or more types selected from the group consisting of tapioca starch, rice starch, sweet potato starch, pea starch, potato starch, and cornstarch, more preferably one or more types selected from the group consisting of pea starch, potato starch, and cornstarch.

[0018] In this case, the content of starch other than high-amylose cornstarch in the starch can be, for example, the remainder excluding high-amylose cornstarch in the starch. More specifically, from the viewpoint of improving the heat resistance of the powder, the content of starch other than high-amylose cornstarch in the starch is, for example, less than 50% by mass, more preferably 45% by mass or less, even more preferably 40% by mass or less, and even more preferably 25% by mass or less, and may also be, for example, 5% by mass or more, or, for example, 10% by mass or more, based on the total mass of the starch.

[0019] Furthermore, when the powder contains components other than starch, specific examples of such components include amylose such as purified amylose and synthetic amylose; plasticizers such as sugars, glycerin, and sugar alcohols; and water-soluble polymers such as dextrin and polysaccharides.

[0020] When the powder contains amylose, the total content of starch and amylose in the powder is preferably more than 80% by mass, more preferably 90% by mass or more, even more preferably 95% by mass or more, and even more preferably 97% by mass or more, based on the total powder mass, from the viewpoint of obtaining a desirable hardness of the powder. The total content of starch and amylose in the powder is 100% by mass or less, for example, 99% by mass or less, or 98% by mass or less, based on the total powder mass.

[0021] Next, the characteristics of the powder will be described. The difference between the heat-soluble fraction amount of the powder after heating at 80°C for 30 minutes (hereinafter also simply referred to as the "heat-soluble fraction amount") and the cold-water-soluble fraction amount at 25°C (hereinafter also simply referred to as the "cold-water-soluble fraction amount") (hereinafter also simply referred to as the "soluble fraction amount difference") is less than 10%, preferably 9% or less, more preferably 8% or less, even more preferably 7% or less, and even more preferably 6% or less, from the viewpoint of improving the heat resistance of the powder. Furthermore, the soluble fraction amount difference of the powder is specifically 0.1% or more, and may be, for example, 1% or more, or 2% or more.

[0022] From the viewpoint of improving the heat resistance of the powder, the heat-soluble fraction of the powder is preferably 10% or less, more preferably 9.5% or less, even more preferably 9% or less, still more preferably 8% or less, and even more preferably 6% or less. Specifically, the heat-soluble fraction of the powder is 0% or more, and may be, for example, 1% or more, or 2% or more.

[0023] From the viewpoint of improving the heat resistance of the powder, the cold water soluble fraction of the powder may be, for example, 5% or less, preferably 3% or less, more preferably 2% or less, even more preferably 1% or less, and even more preferably 0.5% or less. The cold water soluble fraction of the powder may specifically be 0% or more, for example, 0.1% or more, or 0.2% or more.

[0024] The heat swelling degree of the powder at 80°C (hereinafter also simply referred to as "heat swelling degree") is preferably 6.0 or less, more preferably 5.5 or less, even more preferably 5.0 or less, still more preferably 4.5 or less, and even more preferably 4.0 or less, from the viewpoint of imparting an appropriate hardness to the powder. Furthermore, from the viewpoint of reducing irritation to the skin, the heat swelling degree is preferably 1.0 or more, more preferably 1.5 or more, and even more preferably 2.0 or more.

[0025] The cold water swelling degree at 25°C (hereinafter also simply referred to as "cold water swelling degree") is preferably 5.0 or less, more preferably 4.5 or less, and even more preferably 4.0 or less, from the viewpoint of imparting an appropriate hardness to the powder. Furthermore, from the viewpoint of reducing irritation to the skin, the cold water swelling degree is preferably 1.0 or more, more preferably 1.5 or more, and even more preferably 2.0 or more.

[0026] The heat-soluble fraction amount, cold-water-soluble fraction amount and difference in soluble fraction amount are specifically measured by the following methods, which will be explained below together with the methods for measuring the cold water swelling degree and the heat swelling degree.

[0027] (Measurement Method 1: Method for Measuring the Amount of Cold Water Soluble Fraction) 1. Using a moisture meter (e.g., Model MX-50 manufactured by A&D Co., Ltd.), the sample is heated and dried at 125°C to measure the moisture content, and the dry mass is calculated from the obtained moisture content value. 2. 1 g of sample (A) converted to this dry mass is dispersed in 50 mL of water at 25°C, gently stirred in a thermostatic bath at 25°C for 30 minutes, and then centrifuged at 3000 rpm for 10 minutes (e.g., centrifuge: Hitachi tabletop centrifuge CT6E type manufactured by Hitachi Koki Co., Ltd.; rotor: T4SS type swing rotor; adapter: 50TC x 2S adapter) to separate into a precipitate layer and a supernatant layer. 3. The supernatant layer is removed, the mass of the precipitate layer is measured, and this is used as B. 25 4. When the precipitate layer is dried (105°C, constant weight), the mass is measured and this is taken as C 25 (g). 5. Measure the amount of cold water soluble fraction and the degree of cold water swelling using the following formula: Amount of cold water soluble fraction (%) = 100 x (A - C) 25 ) / A Cold water swelling degree = B 25 / C25

[0028] (Measurement Method 2: Method for measuring the amount of heat-soluble fraction, the difference in the amount of soluble fraction, and the degree of heat swelling) In step 2 of the above-mentioned Measurement Method 1, instead of gently stirring for 30 minutes in a thermostatic bath at 25°C, gently stirring was performed for 30 minutes in a thermostatic bath at 80°C, and then the mixture was allowed to cool to 30°C. Except for this, steps 1 to 4 were carried out in accordance with the above-mentioned Measurement Method 1, and the precipitate layer mass B at 80°C was measured. 80 (g) and its dry matter amount C 80 Then, the amount of heat-soluble fraction, the difference in the amount of soluble fraction, and the degree of heat swelling are calculated using the following formula: Amount of heat-soluble fraction (%) = 100 × (A - C) 80 ) / A Difference in soluble fraction amount (%) = Heat soluble fraction amount - Cold water soluble fraction amount Heat swelling degree = B 80 / C 80

[0029] From the viewpoint of improving the massaging properties of the scrubbing agent and the detergency when used in a cleanser, the median diameter of the powder is preferably 10 μm or more, more preferably 50 μm or more, even more preferably 100 μm or more, and even more preferably 120 μm or more. Furthermore, from the viewpoint of reducing skin irritation, the particle diameter of the powder is preferably 1000 μm or less, more preferably 800 μm or less, even more preferably 600 μm or less, even more preferably 400 μm or less, and even more preferably 300 μm or less. Here, the median diameter of the powder is specifically the median diameter of the powder in water, more specifically the median diameter of the powder in water measured at 25° C. using a laser diffraction / scattering particle size distribution analyzer.

[0030] The degree of gelatinization (degree of gelatinization) measured by the β-amylase-pullulanase (BAP) method is preferably less than 10%, more preferably 9.0% or less, and even more preferably 8.0% or less, from the viewpoint of improving the heat resistance of the powder. Specifically, the degree of gelatinization is 0% or more, and may be, for example, 1.0% or more. Specifically, the degree of gelatinization of the powder can be measured according to the method described in "New method for measuring the degree of gelatinization and retrogradation of starch using a β-amylase-pullulanase (BAP) system" in Starch Science, Vol. 28, No. 4, pp. 235-240 (1981).

[0031] (Production Method) Next, a method for producing a powder will be described. The method for producing a powder includes, for example, preparing raw ingredients containing raw starch to obtain a powdery composition. More specifically, the method for producing a powder includes the following steps 1 and 2: (Step 1) A step of preparing raw ingredients containing raw starch; and (Step 2) A step of granulating the raw ingredients.

[0032] To obtain a powder having a difference in soluble fraction amount within the above range, it is important to appropriately select the raw material components and blending of the powder, as well as the granulation conditions. More specifically, by selecting an appropriate type of raw starch and adjusting the processing conditions (temperature, hydration rate, etc.) within appropriate ranges, a powder having a difference in soluble fraction amount within the specified range can be stably obtained.

[0033] In step 1, the raw materials described above are prepared. In step 2, a method commonly used for granulation can be used, such as extrusion granulation, stirring granulation, rolling granulation, dry granulation, or melt granulation. For example, an extruder, a spray dryer, a mixer, or the like can be used.

[0034] Furthermore, since the powder of this embodiment can be obtained more stably in step 2, step 2 preferably includes granulating the raw material components by heating and pressurizing them, more preferably includes granulating the raw material components by heating and pressurizing them using an extruder, and even more preferably includes granulating the raw material components by heating and pressurizing them using an extruder under conditions such that the degree of gelatinization of the starch is less than 10%.

[0035] When extruder processing is performed, water is typically added to the raw material to bring the water content to about 10 to 50% by mass, and the material is then thermally expanded under conditions of, for example, a barrel temperature of 30 to 200°C, an outlet temperature of 100 to 160°C, and a screw rotation speed of 100 to 1,000 rpm. The water content is adjusted, for example, depending on the type of raw starch. The preferred conditions for extruder processing are as follows: Water content (water content relative to raw material): preferably 12 to 40% by mass, more preferably 15 to 35% by mass, and even more preferably 17 to 32% by mass. Barrel temperature: preferably 30 to 190°C, more preferably 30 to 180°C, and even more preferably 30 to 170°C. Outlet temperature: preferably 100 to 160°C, more preferably 110 to 150°C, and even more preferably 120 to 140°C. Screw rotation speed: preferably 120 to 1,000 rpm, more preferably 140 to 1,000 rpm, and even more preferably 150 to 1,000 rpm.

[0036] The granulated product obtained in step 2 may be used as a powder as it is, or may be crushed, sieved, and appropriately adjusted in size to form a powder, if necessary.

[0037] For example, the particle size of the powder may be adjusted to the undersieve fraction of a sieve with openings of 0.25 mm (60 mesh) in accordance with JIS-Z8801-1, i.e., 0.25 mm or less. Furthermore, the proportion of particles having a dry particle size of 0.25 mm or less in the powder may be, for example, 100 mass % or less, or, for example, 95 mass % or less. Furthermore, for example, the particle size of the powder may be adjusted to the undersieve fraction of a sieve with openings of 0.15 mm (100 mesh) in accordance with JIS-Z8801-1, i.e., 0.15 mm or less. Furthermore, the proportion of particles having a dry particle size of 0.15 mm or less in the powder may be, for example, 100 mass % or less, or, for example, 95 mass % or less.

[0038] The powder obtained in this embodiment can be used as a scrub agent as it is or in combination with other ingredients. From the viewpoint of reduced irritation to the body such as skin, the powder is preferably for cosmetics. Furthermore, from the viewpoint of obtaining a preferable scrubbing effect, the powder is preferably for use in cleansing agents such as skin cleansers or for massage.

[0039] (Scrubbing Agent) In this embodiment, the scrubbing agent specifically includes the powder in this embodiment. The scrubbing agent may be composed of powder, or may further contain components other than powder. The scrubbing agent is specifically a preparation for personal care such as a cleanser or massage agent, and is preferably a skin cleanser or massage agent. The scrubbing agent is also preferably a cosmetic. Cosmetics will be described later. The scrubbing agent may also be applied to animals other than humans (e.g., mammals), cosmetic tools, etc.

[0040] Specific examples of the detergent include detergents for personal care. Examples of detergents for personal care include skin cleansers such as makeup removers, facial cleansers, hand soaps, body soaps, and skin cleansing powders; hair cleansers such as shampoos and hair washing powders; and oral cleansers such as dentifrices and mouthwashes. Because of their excellent low irritation to the skin, the detergent is preferably a skin cleanser. Specific examples of the massage agent include massage agents for personal care such as skin massage agents, scalp massage agents, and nail scrubs.

[0041] The dosage form of the scrub agent may be, for example, liquid such as an aqueous solution, emulsion, or suspension; semi-solid such as a gel or cream; or solid such as a powder, granule, or solid.

[0042] From the viewpoint of improving the cleaning or massaging effect and the feeling of use, the content of the powder in the scrubbing agent is preferably 0.1% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, even more preferably 3% by mass or more, and even more preferably 5% by mass or more, based on the total amount of the scrubbing agent. The content of the powder in the scrubbing agent is 100% by mass or less. The upper limit of the powder content may be appropriately set depending on the type and formulation of the scrubbing agent, and may be, for example, 20% by mass or less, or, for example, 10% by mass or less, based on the total amount of the scrubbing agent.

[0043] Other ingredients contained in the scrubbing agent include, for example, ingredients contained in the cosmetics described below. The other ingredients can be selected depending on, for example, the type and dosage form of the scrubbing agent.

[0044] The manufacturing method of the scrubbing agent includes, for example, a step of blending the powder of this embodiment. More specifically, the scrubbing agent can be obtained by adding the powder of this embodiment to an intermediate product or a final product in the manufacturing process of the scrubbing agent. In addition, the manufacturing method of the scrubbing agent can be selected depending on the type and formulation of the scrubbing agent, and the powder of this embodiment can be blended in the manufacturing process.

[0045] In this embodiment, the cleansing method includes applying the scrub agent of this embodiment to a subject and cleansing. Furthermore, the skin cleansing method includes, for example, applying the scrub agent of this embodiment to the skin and cleansing, preferably by applying it to the skin. After applying the cleansing agent to the skin, the skin may be massaged.

[0046] In this embodiment, the massaging method includes applying the scrubbing agent of this embodiment to a subject and massaging. Also, the skin massaging method includes, for example, applying the scrubbing agent of this embodiment to the skin and massaging, and preferably includes applying the scrubbing agent to the skin and massaging.

[0047] (Cosmetics) In this embodiment, the cosmetics include the scrubbing agent of this embodiment. The cosmetics may consist of the scrubbing agent, or may further contain ingredients other than the scrubbing agent. The cosmetics can be used not only for humans, but also for pets such as dogs and cats, and for items such as makeup brushes, and are preferably intended for use by humans.

[0048] Any cosmetic product may be used as long as it can contain the scrubbing agent of this embodiment. Specific examples include the various cleansers and massage agents mentioned above, as well as skin cosmetics such as lotions, emulsions, beauty serums, moisturizing creams, packs, massage or cold creams, skin care creams, cosmetic oils, hand creams or lotions, body creams or lotions, and baby lotions; hair cosmetics such as rinses, hair treatments, hair creams, hair mousses, hair waxes, hair sprays, and hair growth agents; oral cosmetics; nail cosmetics such as nail polish; beard cosmetics such as shaving creams or foams; deodorant cosmetics such as antiperspirants; and special-purpose cosmetics such as sunscreens and sunscreen cosmetics. The cosmetic product is preferably a type selected from the group consisting of skin cosmetics, finishing cosmetics, and hair cosmetics, and more preferably a type selected from the group consisting of skin cosmetics and finishing cosmetics. Here, cosmetics also include quasi-drugs.

[0049] The formulation of the cosmetic product is not limited. It may be in any of the following forms: liquid, such as an aqueous solution, emulsion, or suspension; semisolid, such as a gel or cream; or solid, such as a powder, granule, or solid. It may also be in the form of an emulsion, such as a cream or emulsion; an oil gel, such as lipstick; a powder, such as foundation; or an aerosol, such as a hair styling product.

[0050] From the viewpoint of improving the feel of the cosmetic when used, the content of the scrubbing agent in the cosmetic is preferably 0.1% by mass or more, more preferably 1% by mass or more, even more preferably 2% by mass or more, even more preferably 3% by mass or more, and even more preferably 5% by mass or more, based on the total cosmetic. The content of the scrubbing agent in the cosmetic is 100% by mass or less. The upper limit of the powder content may be appropriately adjusted depending on the type and formulation of the cosmetic, and may be, for example, 20% by mass or less, or 10% by mass or less, based on the total cosmetic.

[0051] Ingredients other than powders that are blended into cosmetics include ingredients typically used in cosmetics, such as oil-based ingredients, aqueous ingredients, whitening agents, moisturizers, stabilizers, antioxidants, preservatives, pH adjusters, UV absorbers, thickeners, powder ingredients, coloring materials, fragrances, surfactants, skin nutrient ingredients, and beauty ingredients.

[0052] Of these, the oily component may be, for example, one or more selected from the group consisting of fats and oils, hydrocarbons, higher fatty acids, higher alcohols, waxes, ester oils, and silicone oils.

[0053] Examples of fats and oils include vegetable fats and oils such as soybean oil, rapeseed oil, palm oil, corn oil, olive oil, sesame oil, perilla oil, linseed oil, safflower oil, sunflower oil, cottonseed oil, rice bran oil, peanut oil, cocoa butter, palm kernel oil, coconut oil, camellia oil, tea oil, mustard oil, kapok oil, kaya oil, walnut oil, poppy seed oil, macadamia nut oil, avocado oil, persic oil, shea butter, and rosehip oil; animal fats and oils such as beef tallow, lard, milk fat, chicken oil, fish oil, horse fat, mink oil, turtle oil, and egg yolk oil; and synthetic fats and oils such as medium-chain fatty acid triglycerides. Also included are processed fats and oils obtained by fractionating, hydrogenating, transesterifying, etc., these fats and oils.

[0054] Examples of hydrocarbons include one or more selected from the group consisting of liquid paraffin, petrolatum, paraffin wax, and squalane. Examples of higher fatty acids include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid, and docosahexaenoic acid. Examples of higher alcohols include lauryl alcohol, cetyl alcohol, and stearyl alcohol. Examples of waxes include beeswax, carnauba wax, rice wax, lanolin, and jojoba oil. Examples of ester oils include isopropyl myristate, isopropyl palmitate, cetyl ethylhexanoate, triethylhexanoin, and butyl oleate. Examples of silicone oils include dimethicone, cyclopentasiloxane, and methylphenylsiloxane.

[0055] Examples of aqueous components include one or more selected from the group consisting of water; ethanol; glycols such as propylene glycol, 1,3-butylene glycol, dipropylene glycol, tripropylene glycol, 1,2-pentanediol, and polyethylene glycol; glycerols such as glycerin, diglycerin, and polyglycerin; and plant extracts such as aloe vera, witch hazel, hamamelis, cucumber, lemon, lavender, and rose.

[0056] When a cosmetic product contains an oily component, the oily component may be blended in accordance with the type of cosmetic product, and the blending amount is not limited, but preferably the oily component is blended in an amount of 0.1 to 100 parts by mass per part by mass of powder, more preferably 0.4 to 40 parts by mass per part by mass of powder, and even more preferably 0.6 to 10 parts by mass of oily component per part by mass of powder.

[0057] When a cosmetic product contains an oily component and water, the oily component and water may be blended according to the type of cosmetic product, and the blending amounts are not limited. Preferably, the oily component is in an amount of 0.1 to 90 parts by mass and the water is in an amount of 0.1 to 90 parts by mass per part by mass of powder, more preferably, the oily component is in an amount of 0.4 to 40 parts by mass and the water is in an amount of 2 to 40 parts by mass per part by mass of powder, and even more preferably, the oily component is in an amount of 0.6 to 10 parts by mass and the water is in an amount of 3 to 10 parts by mass per part by mass of powder.

[0058] Cosmetics can be produced, for example, by adding powder to an intermediate product or a final product in the cosmetic production process. Specific examples of the cosmetic production method include a method of producing cosmetics by adding and mixing the powder of this embodiment with other cosmetic ingredients; and a method of producing cosmetics by adding and mixing a cosmetic composition obtained by mixing the powder of this embodiment with other cosmetic ingredients. More specifically, examples include a method of producing cosmetics by adding and mixing the powder of this embodiment with an oily component; a method of producing cosmetics by adding and mixing the powder of this embodiment with other powdery components; a method of producing cosmetics by adding and mixing the powder of this embodiment with an oily component and an aqueous component; a method of producing cosmetics by adding and mixing the cosmetic composition obtained by mixing the powder of this embodiment with an oily component and an aqueous component; a method of producing cosmetics by adding and mixing the cosmetic composition obtained by mixing the powder of this embodiment with other powdery components; a method of producing cosmetics by adding and mixing the cosmetic composition obtained by mixing the powder of this embodiment with other cosmetic ingredients; a method of producing cosmetics by adding and mixing the cosmetic composition obtained by mixing the powder of this embodiment with other cosmetic ingredients; and a method of producing cosmetics by adding and mixing the cosmetic composition obtained by mixing the powder of this embodiment with other cosmetic ingredients.

[0059] Although the embodiments of the present invention have been described above, these are merely examples of the present invention, and various other configurations can also be adopted.

[0060] Examples of the present invention will be described below, but the scope of the present invention is not limited to these examples.

[0061] The main raw materials used were as follows: (Starch) High amylose waxy cornstarch: J-Oil Mills HS-7, manufactured by J-Oil Mills Co., Ltd., amylose content 72% by mass Pea starch: manufactured by Puris, amylose content 43% by mass Regular cornstarch: J-Oil Mills Cornstarch Y, manufactured by J-Oil Mills Co., Ltd., amylose content 26% by mass Potato starch: Jelcol BP-200, manufactured by J-Oil Mills Co., Ltd., amylose content 35% by mass (Others) Coffee powder scrub: NIKKOL Cafe scrub UC, manufactured by Nikko Chemicals Co., Ltd. Glucomannan scrub: BIODIOS Scrub White, manufactured by Shimizu Chemical Co., Ltd.

[0062] (Examples 1 to 11, Comparative Examples 1 to 7) Powders of each example were produced using starch, and the properties were measured.

[0063] (Method of Manufacturing Powder) In each example except for Comparative Examples 6 and 7, various raw materials were extrusion-granulated using a twin-screw extruder, Process 11 (manufactured by Thermo Scientific). Extrusion granulation using the extruder was carried out under the following conditions: barrel temperature 50-140°C, die temperature 110-140°C, feed rate ("raw material input rate" in Table 1) 6.9-7.9 g / min, water content 22.8-33.6% (relative to powder), die diameter 1.5-2.0 mm, LD ratio 40, and screw rotation speed 150 rpm. More specific manufacturing conditions for each example are shown in Table 1. The properties of the powders obtained in each example were measured using the following methods. The measurement results are shown in Table 2.

[0064] (Measurement of Properties) (Cold Water Swelling, Amount of Cold Water Soluble Fraction) 1. The composition was crushed in advance and the undersize fraction of a 0.25 mm (60 mesh) sieve according to JIS-Z8801-1, i.e., the particle size adjusted to 0.25 mm or less, was used as the measurement sample. 2. The sample was heated and dried at 125°C using a moisture meter (manufactured by A&D Co., Ltd., Model No. MX-50) to measure the moisture content, and the dry mass was calculated from the obtained moisture value. 3. 1 g of sample (A) was weighed into a 50 mL tube based on this dry mass. 4. While stirring with a vortex mixer, water was added to the tube up to the 50 mL mark. 5. After mixing by inversion 5 times to disperse the precipitate, the sample was stirred with a vortex mixer for 10 seconds and allowed to stand in a constant temperature bath at 25°C for 30 minutes. 6. The mixture was centrifuged (3000 rpm, 10 min) to separate the precipitate and supernatant layers. (Centrifuge: Hitachi tabletop centrifuge CT6E type manufactured by Hitachi Koki Co., Ltd.; rotor: T4SS type swing rotor; adapter: 50TC x 2S adapter) 7. The supernatant was removed with a pipette, and the mass of the precipitate layer was measured. 25 8. The mass of the precipitation tank was measured after drying (105°C, 24 hours), and this was designated as C 25 9. The amount of cold water soluble fraction and the degree of cold water swelling were calculated using the following formula: Amount of cold water soluble fraction (%) = 100 × (A - C 25 ) / A Cold water swelling degree = B 25 / C 25

[0065] (Heat swelling degree, difference in soluble fraction amount, heat soluble fraction amount) 1. The composition was crushed in advance and the undersize fraction of a 0.25 mm (60 mesh) sieve according to JIS-Z8801-1, i.e., the particle size adjusted to 0.25 mm or less, was used as the measurement sample. 2. The sample was heated and dried at 125°C using a moisture meter (manufactured by A&D Co., Ltd., model number MX-50) to measure the moisture content, and the dry mass was calculated from the obtained moisture value. 3. 1 g of sample (A) was weighed into a 50 mL tube based on this dry mass. 4. While stirring with a vortex mixer, water was added to the tube up to the 50 mL mark. 5. After mixing by inversion 5 times to disperse the precipitate, the sample was stirred with a vortex mixer for 10 seconds, heated in an 80°C thermostatic bath for 30 minutes, and then cooled to 30°C. 6. The mixture was centrifuged (3000 rpm, 10 min) to separate the precipitate and supernatant layers. (Centrifuge: Hitachi tabletop centrifuge CT6E type manufactured by Hitachi Koki Co., Ltd.; rotor: T4SS type swing rotor; adapter: 50TC x 2S adapter) 7. The supernatant was removed with a pipette, and the mass of the precipitate layer was measured. 80 8. The mass of the precipitation tank was measured after drying (105°C, 24 hours), and this was designated as C 80 9. The amount of heat-soluble fraction, the difference in the amount of soluble fraction, and the degree of heat swelling were measured using the following formula: Amount of heat-soluble fraction (%) = 100 x (A - C) 80 ) / A Difference in soluble fraction amount (%) = Heat soluble fraction amount - Cold water soluble fraction amount Heat swelling degree = B 80 / C 80

[0066] (Median diameter) Using water as a dispersion medium, the particle size distribution of each powder at 25°C was measured using a laser diffraction / scattering particle size distribution measuring device (manufactured by Horiba, Ltd., model LA-960v2), and the median diameter was obtained based on the volume-based particle size distribution.

[0067] (Degree of Gelatinization) The degree of gelatinization of the starch constituting the powder was measured by the β-amylase-pullulanase (BAP) method. 1. The composition was pulverized in advance, and the undersize fraction of a JIS-Z8801-1 sieve with a mesh size of 0.15 mm (100 mesh), i.e., the particle size adjusted to 0.15 mm or less, was used as the measurement sample. 2. The degree of gelatinization of the starch in the granules was measured according to the method described in "A New Method for Measuring the Degree of Gelatinization and Retrogradation of Starch Using a β-amylase-pullulanase (BAP) System" in Starch Science, Vol. 28, No. 4, pp. 235-240 (1981).

[0068] Comparative Example 6 A commercially available coffee powder scrub was used as it was in this example.

[0069] Comparative Example 7 Commercially available glucomannan scrub was used as it was as the powder of this example.

[0070]

[0071]

[0072] (Evaluation) The powders obtained in some of the examples were evaluated as follows. For Comparative Examples 6 and 7, only the non-heated evaluation was performed. The results are shown in Table 3.

[0073] (Evaluation 1) Preparation and Evaluation of Scrub-Containing Facial Cleanser 1. 5 parts of each example powder was added to 95 parts of a commercially available facial cleanser (Biore Skincare Facial Cleanser Moisture, manufactured by Kao Corporation) and mixed thoroughly. This was used as a scrub-containing facial cleanser. 2. The scrub-containing facial cleanser was divided into unheated and heated evaluation samples, and the heated evaluation sample was heated in a constant temperature bath at 80°C for 30 minutes. 3. 100 parts by mass of water was added to 1 part by mass of each of the scrub-containing facial cleansers for unheated and heated evaluation, and mixed thoroughly to obtain an evaluation sample for each example. 4. The cleansing power and after-wash feeling were evaluated using the following procedure.

[0074] (Method for evaluating cleansing power and after-wash feeling) 1. Lipstick (Kancolle Matte Lipstick, manufactured by Erato Co., Ltd.) was applied five times to the inside of the arm. 2. One drop of each evaluation sample was applied. 3. The lipstick was rubbed ten times with a finger as if to remove the lipstick. No special pressure was applied to the finger during this process. 4. The product was rinsed with water for 10 seconds. 5. The cleansing power (how well the lipstick color was removed after rinsing) and after-wash feeling (massage effect and refreshing feeling on the skin) were evaluated according to the following criteria. Evaluation was performed by three people, and the average was used as the score. A score of 3.0 or higher was considered a pass.

[0075] (Cleaning power) 5: Over 90% of lipstick has been removed 4: About 70% of lipstick has been removed 3: About 50% of lipstick has been removed 2: Only about 30% of lipstick has been removed 1: Less than 10% of lipstick has been removed

[0076] (After washing) 5: There is a sufficient massage effect during washing, and it feels very refreshing. 4: There is a massage effect during washing, and it feels refreshing. 3: There is a slight massage effect during washing, and it feels somewhat refreshing. 2: There is almost no massage effect during washing, and it doesn't feel very refreshing. 1: There is no massage effect during washing, and it doesn't feel refreshing at all.

[0077] (Evaluation 2) Preparation and Evaluation of Scrub Water Suspension 1. 95 parts by mass of water and 5 parts by mass of each example powder were thoroughly mixed to obtain a scrub water suspension. 2. The scrub water suspension was divided into an unheated evaluation and a heated evaluation, and the heated evaluation was heated in a warm bath at 80°C for 30 minutes. 3. The scrub water suspensions for the unheated evaluation and the heated evaluation were used as evaluation samples as they were. 4. The particle hardness and irritation were evaluated using the following procedure.

[0078] (Method for evaluating granule hardness and non-irritation) 1. An appropriate amount of the evaluation sample of each example was dropped onto the back of the hand. 2. The dropped granules were pressed or rubbed with a finger to evaluate the granule hardness (hardness felt when pressed with a finger) and non-irritation (lack of irritation such as pain). Evaluation was performed by three people, and the average was used as a score. For granule hardness, a score of 3.0 or more was considered pass, and for non-irritation, a score of 1.0 or more was considered pass.

[0079] (Hardness of grains) 5: Very hard, with a strong grainy feel 4: Somewhat hard, with a grainy feel 3: Relatively hard, with a slight grainy feel 2: Soft, with a weak grainy feel 1: Very soft, with a very weak grainy feel 0: The grains crumble easily, with no grainy feel at all

[0080] (Non-irritating) 2: No irritation 1: Almost no irritation 0: Too strong irritation

[0081]

[0082] As can be seen from Table 3, the powders obtained in each Example were excellent in balance of the effects of cleansing power, washing sensation, granule hardness, and irritation in both the non-heated and heated evaluations. Furthermore, by using the powders obtained in each Example, a desirable skin massage effect was realized.

[0083] This application claims priority based on Japanese Patent Application No. 2023-196068, filed November 17, 2023, the disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A powder for use as a scrubbing agent, comprising 60% or more by mass of starch, and having a difference of less than 10% between the amount of heat-soluble fraction after heating at 80°C for 30 minutes and the amount of cold water-soluble fraction at 25°C.

2. The powder according to claim 1, wherein the amylose content of the raw starch for the starch is 50% by mass or more.

3. The powder according to claim 1, wherein the heat-soluble fraction amount is 10% or less.

4. The powder according to claim 1, having a thermal swelling degree at 80°C of 6.0 or less.

5. The powder according to claim 1, having a cold water swelling index at 25°C of 5.0 or less.

6. The powder according to claim 1, having a median diameter of 10 μm or more and 1,000 μm or less.

7. The powder of claim 1, wherein the starch comprises high amylose corn starch.

8. The powder of claim 7, wherein said starch further comprises a starch other than said high amylose corn starch.

9. The powder according to claim 8, wherein the starch other than high amylose corn starch is one or more selected from the group consisting of pea starch, potato starch and corn starch.

10. The powder according to claim 1, having a degree of gelatinization of less than 10% as measured by the β-amylase-pullulanase (BAP) method.

11. The powder according to claim 1, which is for use in cosmetics.

12. The powder according to claim 1, which is used as a skin cleanser or for massage.

13. A scrubbing agent comprising the powder according to any one of claims 1 to 12.

14. The scrubbing agent according to claim 13, which is a cosmetic product.

15. The scrub according to claim 14, which is a skin cleansing agent or a massage agent.

16. A method for producing a scrubbing agent, comprising the step of blending a powder according to any one of claims 1 to 12.

17. A method for cleansing the skin, comprising applying the scrub agent according to claim 13 to the skin and cleansing the skin.

18. A method of massaging comprising applying the scrub agent according to claim 13 to the skin and massaging.