WO2023171641A1 - Antimicrobial sponge for cosmetics - Google Patents

Antimicrobial sponge for cosmetics Download PDF

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Publication number
WO2023171641A1
WO2023171641A1 PCT/JP2023/008461 JP2023008461W WO2023171641A1 WO 2023171641 A1 WO2023171641 A1 WO 2023171641A1 JP 2023008461 W JP2023008461 W JP 2023008461W WO 2023171641 A1 WO2023171641 A1 WO 2023171641A1
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WIPO (PCT)
Prior art keywords
antibacterial
sponge
cosmetic
oil
essential oil
Prior art date
Application number
PCT/JP2023/008461
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French (fr)
Japanese (ja)
Inventor
宗十 西村
興司 中村
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株式会社タイキ
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Publication of WO2023171641A1 publication Critical patent/WO2023171641A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D33/00—Containers or accessories specially adapted for handling powdery toiletry or cosmetic substances
    • A45D33/34—Powder-puffs, e.g. with installed container
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D34/00—Containers or accessories specially adapted for handling liquid toiletry or cosmetic substances, e.g. perfumes
    • A45D34/04—Appliances specially adapted for applying liquid, e.g. using roller or ball
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

Definitions

  • the present invention relates to a cosmetic antibacterial sponge. More specifically, the present invention has an antibacterial cosmetic sponge that is excellent in antibacterial properties, antibacterial maintenance properties, and wash resistance, and the antibacterial cosmetic sponge is suitable for use in cosmetics such as liquid foundations and powder cosmetics.
  • the present invention relates to a cosmetic antibacterial applicator that can be suitably used when applying cosmetics to the skin.
  • the cosmetic antibacterial applicator when cosmetics adhere to the cosmetic antibacterial applicator, the cosmetic antibacterial applicator is generally washed in order to keep the cosmetic antibacterial applicator sanitary.
  • the organic synthetic antibacterial agent is removed from the cosmetic antibacterial applicator along with the adhering cosmetics. Not only will it be impossible to maintain the antibacterial properties of the antibacterial cosmetic applicator, but the organic synthetic antibacterial agent removed from the antibacterial cosmetic applicator will be drained away, raising concerns about the impact on the natural environment.
  • the present invention has been made in view of the above-mentioned prior art, and provides an antibacterial product for cosmetics that has excellent antibacterial properties even without the use of organic synthetic antibacterial agents, and has excellent antibacterial maintenance properties and washing resistance.
  • an antibacterial cosmetic applicator that includes a sponge and the antibacterial cosmetic sponge and can be suitably used, for example, when applying cosmetics such as liquid foundation and powder cosmetics to the skin. The task is to
  • the present invention (1) An antibacterial cosmetic sponge characterized by containing a vegetable essential oil as an essential oil component; (2) The vegetable essential oil according to (1) above, wherein the vegetable essential oil is at least one vegetable essential oil selected from the group consisting of peppermint oil, lavender oil, tea tree oil, eucalyptus oil, lemon oil, hinokitiol oil, and neem oil.
  • the cosmetic antibacterial sponge according to (1) above wherein the vegetable essential oil is contained in the polymer constituting the sponge; (4) The cosmetic antibacterial sponge according to (3) above, wherein the amount of vegetable essential oil is 0.0002 to 0.9 parts by mass per 100 parts by mass of the nonvolatile content of the polymer constituting the sponge; (5)
  • the polymer constituting the sponge is selected from the group consisting of acrylonitrile-butadiene rubber, styrene-butadiene rubber, natural rubber, isoprene rubber, urethane rubber, cellulose, polyvinyl alcohol, thermoplastic polyester, polyolefin, and flexible polyurethane.
  • the cosmetic antibacterial sponge according to (3) above which is at least one polymer; (6)
  • the antibacterial activity value based on the provisions of JIS L-1902 (2015) is 2.0 or more, and the halo width based on the provisions of JIS L-1902 (2015) is not detected in the above (1) to (5).
  • an antibacterial cosmetic sponge that has excellent antibacterial properties without using an organic synthetic antibacterial agent, and also has excellent antibacterial retention and washing resistance, and the antibacterial cosmetic sponge.
  • a cosmetic antibacterial applicator that can be suitably used, for example, when applying cosmetics such as liquid foundations and powder cosmetics to the skin.
  • the cosmetic antibacterial sponge of the present invention is characterized by containing vegetable essential oil as an essential oil component.
  • the cosmetic antibacterial sponge of the present invention contains vegetable essential oils, so it has excellent antibacterial properties even without the use of conventionally used organic synthetic antibacterial agents, and it maintains its antibacterial properties even after washing. It also has excellent antibacterial retention and washing resistance.
  • the antibacterial maintenance property is that the vegetable essential oil is difficult to bleed from the cosmetic antibacterial sponge, and the antibacterial property is maintained by the vegetable essential oil being retained in the cosmetic antibacterial sponge. means quality.
  • wash resistance means the property that antibacterial properties are maintained even after the antibacterial cosmetic sponge is washed.
  • the vegetable essential oil used in the antibacterial cosmetic sponge of the present invention is of natural origin, it is distinguished from commonly used organic synthetic antibacterial agents.
  • Vegetable essential oils include peppermint oil, lavender oil, tea tree oil, eucalyptus oil, lemon oil, hinokitiol oil, and neem oil. These vegetable essential oils may be used alone or in combination of two or more.
  • the vegetable essential oil used in the cosmetic antibacterial sponge of the present invention may contain essential oils other than the above-mentioned vegetable essential oils as long as they do not impede the purpose of the present invention.
  • Peppermint oil contains menthol, menthone, and 1,8-cineole as main components, and other components such as methyl acetate, menthofuran, isomenthone, limonene, and pinene as minor components.
  • the content of each component in peppermint oil cannot be definitively determined as it varies depending on the conditions used when distilling peppermint stems and leaves with steam, but examples include approximately 40-60% by mass of menthol, menthone, etc.
  • Examples include peppermint oil containing as main components about 15 to 25% by mass and about 5 to 10% by mass of 1,8-cineole.
  • Peppermint oil has excellent affinity with the sponge made of the above-mentioned soft foamed resin, can prevent the elution of vegetable essential oils, and can improve washing resistance, so it can be suitably used in the present invention.
  • Lavender oil contains linalyl acetate as a main component at a content of 30 to 40% by mass, and also contains components such as limonene, linalool, geraniol, nerol, cineole, and d-borneol.
  • Tea tree oil contains terpineol, cineole, etc.
  • Eucalyptus oil contains citronellal, cineole, camphene, and pinene.
  • Lemon oil contains d-limonene and citral.
  • Hinokitiol oil contains hinokitiol. Neem oil contains azadirachtin.
  • vegetable essential oils it has excellent compatibility with sponges made of rubbers such as acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), urethane rubber, and soft foamed resins such as flexible polyurethane foam.
  • NBR acrylonitrile-butadiene rubber
  • SBR styrene-butadiene rubber
  • urethane rubber urethane rubber
  • soft foamed resins such as flexible polyurethane foam.
  • Peppermint oil is preferred because it can prevent the elution of vegetable essential oils and improve washing resistance.
  • the vegetable essential oil is contained in the polymer constituting the sponge.
  • the reason why vegetable essential oil is contained in the polymer that makes up the sponge is that the vegetable essential oil is already contained in the polymer that is the raw material for the sponge, and that after the sponge is made, it is added to the polymer that makes up the sponge. This includes the fact that vegetable essential oil has been absorbed, and that after the sponge has been produced, the vegetable essential oil has been adsorbed onto the polymer that makes up the sponge.
  • the vegetable essential oil is preferably contained in advance in the polymer that is the raw material of the sponge.
  • the amount of vegetable essential oil per 100 parts by mass of non-volatile content of the polymer constituting the sponge cannot be determined unconditionally because it varies depending on the type of vegetable essential oil, but it is important from the viewpoint of imparting sufficient antibacterial properties to the sponge.
  • the amount is preferably 0.0002 parts by mass or more, more preferably 0.0015 parts by mass or more, still more preferably 0.0075 parts by mass or more, even more preferably 0.015 parts by mass or more, and the stickiness caused by vegetable essential oils is reduced. From the viewpoint of reducing the amount of oil added to the sponge and suppressing the odor of the vegetable essential oil, it is preferably 0.9 parts by mass or less, more preferably 0.6 parts by mass or less, and even more preferably 0.3 parts by mass or less. , even more preferably 0.15 parts by mass or less, particularly preferably 0.145 parts by mass or less.
  • the nonvolatile content of a polymer means a polymer from which volatile components such as a solvent contained in the polymer have been removed.
  • polymers constituting the sponge include rubbers such as acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), natural rubber (NR), isoprene rubber (IR), and urethane rubber; cellulose such as carboxymethyl cellulose; Examples include polyvinyl alcohol; thermoplastic polyester; polyolefin; thermoplastic resins such as flexible polyurethane; however, the present invention is not limited to these examples. These polymers may be used alone or in combination of two or more.
  • NBR acrylonitrile-butadiene rubber
  • SBR styrene-butadiene rubber
  • NR natural rubber
  • IR isoprene rubber
  • urethane rubber urethane rubber
  • cellulose such as carboxymethyl cellulose
  • examples include polyvinyl alcohol; thermoplastic polyester; polyolefin; thermoplastic resins such as flexible polyurethane; however, the present invention is not limited to these examples. These polymers may be used alone or in combination
  • thermoplastic polyester examples include polyethylene terephthalate and polybutylene terephthalate, but the present invention is not limited to these examples.
  • polyolefin examples include polyethylene, polypropylene, ethylene-propylene copolymer, etc., but the present invention is not limited to these examples.
  • acrylonitrile-butadiene rubber NBR
  • styrene-butadiene rubber SBR
  • natural rubber isoprene rubber
  • urethane rubber urethane rubber
  • soft polyurethane is preferred, from the viewpoint of improving the antibacterial properties of the sponge, acrylonitrile-butadiene rubber (NBR) and styrene-butadiene rubber (SBR) are more preferred, and acrylonitrile-butadiene rubber (NBR) is even more preferred.
  • acrylonitrile-butadiene rubber has excellent affinity with peppermint oil, prevents the elution of vegetable essential oils, improves washing resistance, and improves the antibacterial properties of the sponge. From the viewpoint of achieving this, it is preferable to use acrylonitrile-butadiene rubber (NBR) in combination with peppermint oil.
  • the rubber When using rubber as the polymer, the rubber can be used as latex.
  • Polymers such as thermoplastic resins and cellulose can be used in a form suitable for the polymer, such as a solution, emulsion, or suspension.
  • polyolefin When polyolefin is used as the polymer, the heated and melted polyolefin and vegetable essential oil may be kneaded to obtain a uniform composition.
  • flexible polyurethane a foam of the flexible polyurethane (flexible polyurethane foam) can be used as a sponge.
  • the cosmetic antibacterial sponge of the present invention can be prepared by, for example, preparing a polymer containing vegetable essential oil by mixing vegetable essential oil and a polymer and dispersing the vegetable essential oil in the polymer, and adding the sponge to the polymer.
  • a gas such as air, nitrogen gas, carbon dioxide gas, etc. is mixed into the polymer to have a predetermined expansion ratio, the gas bubbles are dispersed in the polymer, and the polymer in which the bubbles are dispersed is filled into a mold.
  • a method of manufacturing an antibacterial cosmetic sponge by heating to a predetermined temperature (hereinafter referred to as manufacturing method A), a method of manufacturing a cosmetic antibacterial sponge by mixing a polymer, a vegetable essential oil, and a chemical blowing agent such as carbonate or bicarbonate, A method of producing an antibacterial cosmetic sponge by heating the mixture to decompose the chemical foaming agent and foaming the polymer (hereinafter referred to as production method B), after impregnating the sponge with vegetable essential oil, A method for producing an antibacterial cosmetic sponge (hereinafter referred to as production method C) by washing the sponge with a solvent such as water to remove the vegetable essential oil liberated within the sponge.
  • the present invention is not limited to only such methods.
  • manufacturing methods A and B are preferred, and manufacturing method A is more preferred, from the viewpoint of improving the antibacterial durability and wash resistance of the cosmetic antibacterial sponge.
  • manufacturing method A and manufacturing method B are adopted, the vegetable essential oil is dispersed in the polymer, but it may be present on the surface of the polymer.
  • the vegetable essential oil may be used as it is or as a solution in an organic solvent.
  • the type of organic solvent is preferably selected and used appropriately depending on the type of vegetable essential oil. Examples of suitable organic solvents include ethanol, but the present invention is not limited to such examples.
  • the concentration of the vegetable essential oil in the organic solvent solution of the vegetable essential oil is not particularly limited, and it is preferable to adjust the concentration of the vegetable essential oil to suit each production method. In production method C, it is preferable to use a solution of a vegetable essential oil in an organic solvent, and it is more preferable to use an organic solvent solution of a vegetable essential oil in which the concentration of the vegetable essential oil is about 10 to 5000 ppm.
  • gas bubbles are dispersed in the polymer containing vegetable essential oil, from the viewpoint of improving the antibacterial durability and washing resistance of the cosmetic antibacterial sponge. is preferred.
  • the sponge may have either closed cells or open cells, it is preferable to have open cells from the viewpoint of increasing the retention of vegetable essential oil within the sponge.
  • the foaming ratio of the cosmetic antibacterial sponge is not particularly limited, but from the viewpoint of improving usability when the cosmetic antibacterial sponge is used as a cosmetic antibacterial applicator such as a puff, it is preferably about 3 to 10 times. It is preferable that there be.
  • the expansion ratio is a value obtained by dividing the volume of the sponge by the volume of the polymer that is the raw material for the sponge.
  • the diameter of the bubbles contained in the sponge is not particularly limited, but it is usually preferably about 0.01 to 50 ⁇ m.
  • the cosmetic antibacterial sponge of the present invention may contain additives such as a vegetable oil such as olive oil, a coloring agent, and a fragrance, within a range that does not impede the purpose of the present invention.
  • the additive may be contained in the polymer constituting the sponge, or may be contained within the bubbles constituting the sponge.
  • the cosmetic antibacterial sponge of the present invention contains a vegetable oil such as olive oil, the flexibility of the cosmetic antibacterial sponge can be increased.
  • the cosmetic antibacterial sponge of the present invention can be obtained in the manner described above.
  • the cosmetic antibacterial sponge of the present invention has antibacterial properties even without the use of conventional organic synthetic antibacterial agents. Since the antibacterial property can be maintained even after the sponge is washed, it has excellent washing resistance and can be suitably used as an antibacterial applicator for cosmetics.
  • acrylonitrile-butadiene rubber has excellent affinity with peppermint oil, prevents the elution of vegetable essential oils, improves washing resistance, and improves the sponge's washing resistance. From the viewpoint of improving the maintenance of antibacterial properties, it is preferable to use a sponge in which acrylonitrile-butadiene rubber (NBR) and peppermint oil are used together, and air bubbles are dispersed in the acrylonitrile-butadiene rubber (NBR) containing peppermint oil. .
  • the type and content of components such as vegetable essential oils and organic synthetic antibacterial agents in cosmetic antibacterial sponges can be determined using analytical instruments such as liquid chromatography and gas chromatography. More specifically, the types and content of ingredients such as vegetable essential oils and organic synthetic antibacterial agents in cosmetic antibacterial sponges can be determined by, for example, extracting the ingredients contained in cosmetic antibacterial sponges with an extraction solvent. Qualitative and quantitative analysis of each component can be performed by preparing an extract by using gas chromatography and examining the retention time and peak size of each component using gas chromatography. can.
  • the cosmetic antibacterial sponge of the present invention has an antibacterial activity value of 2.0 or more as measured based on the provisions of JIS L-1902 (2015), more specifically, according to the measurement method described in the following examples. , the halo width is not detected, so it has excellent antibacterial retention.
  • the cosmetic antibacterial applicator of the present invention includes the cosmetic antibacterial sponge.
  • cosmetic antibacterial applicators include cosmetic sponge puffs, facial cleansing sponges, and cosmetic chips, but the present invention is not limited to these examples.
  • Cosmetic sponge puffs are sponge puffs that are used to take cosmetics into a sponge puff and apply the cosmetics to human skin.
  • a facial cleansing sponge is a sponge used to pick up a facial cleanser on a sponge and apply the facial cleanser to the skin of a human face.
  • the cosmetic antibacterial applicator of the present invention can be manufactured using, for example, the manufacturing methods A to C of cosmetic antibacterial sponges.
  • an antibacterial cosmetic applicator when manufacturing an antibacterial cosmetic applicator using manufacturing method A of an antibacterial cosmetic sponge, vegetable essential oil is mixed with a polymer, and the vegetable essential oil is dispersed in the polymer.
  • a polymer in which the gas bubbles are dispersed is prepared by mixing a gas such as air into the polymer so that the sponge has a predetermined expansion ratio, and dispersing the gas bubbles in the polymer.
  • a cosmetic antibacterial sponge is formed by filling a mold with an inner surface shape corresponding to a cosmetic antibacterial applicator of a predetermined shape and heating the mold to a temperature of about 80 to 130°C.
  • An antibacterial cosmetic applicator can be produced by removing the antibacterial cosmetic sponge from the mold and cutting it to a predetermined thickness as necessary.
  • an antibacterial cosmetic applicator when manufacturing an antibacterial cosmetic applicator using manufacturing method B of an antibacterial cosmetic sponge, a polymer, a vegetable essential oil, and a chemical foaming agent are mixed, and the resulting mixture is used to form an antibacterial cosmetic applicator into a predetermined shape.
  • the chemical foaming agent is decomposed and the polymer is foamed by heating the mold to a temperature of approximately 80 to 130°C.
  • a cosmetic antibacterial applicator is produced by molding a cosmetic antibacterial sponge containing essential oil, taking out the obtained cosmetic antibacterial sponge from the mold, and cutting it to a predetermined thickness as necessary. It can be made.
  • an antibacterial cosmetic applicator when manufacturing an antibacterial cosmetic applicator using manufacturing method C for an antibacterial cosmetic sponge, the sponge is impregnated with vegetable essential oil to create an antibacterial cosmetic sponge, and then water etc. are added as needed. By washing the cosmetic antibacterial sponge with a solvent of By cutting it into pieces, an antibacterial cosmetic applicator can be produced.
  • the cosmetic antibacterial applicator of the present invention uses the cosmetic antibacterial sponge of the present invention, it has excellent antibacterial properties without using an organic synthetic antibacterial agent, and has excellent antibacterial maintenance and resistance. It also has excellent washability, and can be suitably used, for example, when applying cosmetics such as liquid foundations and powder cosmetics to the skin.
  • Examples 1 to 8 100 parts by mass of NBR latex [manufactured by Nippon Zeon Co., Ltd., product name: NIPOL LX531B, resin solid content: 60 mass%] as a polymer constituting the sponge, sulfur as a vulcanizing agent [manufactured by Hosoi Chemical Co., Ltd.]1.
  • vulcanization accelerator manufactured by Kawaguchi Chemical Co., Ltd., trade name: Accel MZ
  • vulcanization aid manufactured by Uniroyal Co., Ltd., trade name: Trimenbase
  • 1.0 parts by mass 1.5 parts by mass of antioxidant manufactured by Kawaguchi Chemical Co., Ltd., trade name: ANTAGE BHT
  • 3.0 parts by mass of sodium fluorosilicide manufactured by Mitsui Toatsu Chemical Co., Ltd.
  • the vegetable essential oil shown in Table 1 was added to the latex composition in the amount shown in Table 1 per 100 parts by mass of non-volatile content of the NBR latex contained in the latex composition obtained above, so as to obtain a uniform composition.
  • a mixture was prepared by mixing.
  • the mixture By mixing air into the mixture obtained above, the mixture is foamed to 5 times the volume (foaming ratio: 5 times), and then the mixture is injected into an aluminum cylindrical body with an inner diameter of 55 mm. did. Subsequently, this cylindrical body was heated at 120° C. for 25 minutes to obtain a cylindrical sponge.
  • the sponge obtained above was taken out from the cylindrical body, washed with water, dried, cut to a thickness of 8 mm, and the edges were polished to produce an antibacterial cosmetic sponge. All of the obtained cosmetic antibacterial sponges had open cells.
  • CFU colony forming unit
  • test piece was not placed on the agar medium, and after culturing the bacteria in a thermostatic chamber at 37°C for 18 hours in the same manner as described above, the bacteria were washed out by washing the test piece with water, and the number of surviving bacteria was determined. B (CFU/mL) was measured.
  • [Antibacterial activity value] log (number of surviving bacteria B/number of surviving bacteria A)
  • the antibacterial activity value was determined based on the following, and the antibacterial property was evaluated based on the following evaluation criteria. (Evaluation criteria) ⁇ : Antibacterial activity value is 5.5 or more (pass). ⁇ : Antibacterial activity value is 2.0 or more and less than 5.5 (pass). ⁇ : Antibacterial activity value is less than 2.0 (fail).
  • agar medium After mixing 1 mL of Staphylococcus aureus bacterial solution (initial number of bacteria: 1.5 x 10 5 CFU/mL) and 15 mL of agar medium adjusted to approximately 45°C in a Petri dish, the agar medium is cooled to room temperature. It was solidified by this. Excess water was removed by tilting the Petri dish.
  • test piece was placed in close contact with the surface of the agar medium in the petri dish, and the bacteria were cultured for 24 hours in a thermostatic chamber at 37°C.
  • the halo width was determined based on the following, and antibacterial maintenance was evaluated based on the following evaluation criteria. Note that the smaller the halo width is, the better the antibacterial maintenance property is.
  • ⁇ Halo width is not detected (pass).
  • ⁇ The halo width was detected and was less than 1 mm (fail).
  • XX The halo width is 1 mm or more (fail).
  • test piece was immersed in an aqueous solution with a neutral detergent concentration of 0.1% by mass and a water temperature of 40°C for 30 minutes, and then rubbed and washed by hand 100 times. After that, the antibacterial properties and antibacterial maintenance properties of the test pieces were evaluated in the same manner as above.
  • Examples 37-41 100 parts by mass of NBR latex [manufactured by Nippon Zeon Co., Ltd., product name: NIPOL LX531B, resin solid content: 60 mass%] as a polymer constituting the sponge, sulfur as a vulcanizing agent [manufactured by Hosoi Chemical Co., Ltd.]1.
  • vulcanization accelerator manufactured by Kawaguchi Chemical Co., Ltd., trade name: Accel MZ
  • vulcanization aid manufactured by Uniroyal Co., Ltd., trade name: Trimenbase
  • 1.0 parts by mass 1.5 parts by mass of antioxidant manufactured by Kawaguchi Chemical Co., Ltd., trade name: ANTAGE BHT
  • 3.0 parts by mass of sodium fluorosilicide manufactured by Mitsui Toatsu Chemical Co., Ltd.
  • the latex composition was foamed to a volume of 5 times (foaming ratio: 5 times), and then the latex composition was foamed into a mold made of aluminum having an inner diameter of 55 mm. was injected into a cylindrical body. Subsequently, this cylindrical body was heated at 120° C. for 25 minutes to obtain a cylindrical sponge. The sponge obtained above was taken out from the cylindrical body, washed with water, dried, cut to a thickness of 8 mm, and the edges were polished to produce a cosmetic sponge.
  • the cosmetic sponge obtained above was immersed for 1 hour in an ethanol solution of peppermint oil (liquid temperature: 23°C) having the concentration of peppermint oil shown in Table 2, and then the cosmetic sponge was immersed in the ethanol solution (liquid temperature: 23°C).
  • the cosmetic sponge was immersed in the ethanol solution (liquid temperature: 23°C).
  • Remove the cosmetic sponge from the solution wash the cosmetic sponge with water to remove peppermint oil that is free within the cosmetic sponge, and dry the cosmetic sponge for 3 hours in a dryer with an internal temperature of 80°C.
  • a cosmetic antibacterial sponge was created using this method. All of the obtained cosmetic antibacterial sponges had open cells.
  • Comparative examples 1 to 9 Example 1 except that the organic synthetic antibacterial agent shown in Table 3 was used in the amount shown in Table 3 instead of using 0.0002 parts by mass of peppermint oil per 100 parts by mass of nonvolatile content of NBR latex in Example 1.
  • a cosmetic antibacterial sponge was prepared in the same manner as above.
  • each abbreviation of the organic synthetic antibacterial agent means the following.
  • ZPT Zinc pyrithione
  • IPBC Propyl butylcarbamate iodide
  • CCR Chlorocresol
  • the cosmetic antibacterial sponge obtained in Comparative Example 1 uses an organic synthetic antibacterial agent (zinc pyrithione), and a halo width (bacterial growth inhibition width) was observed, and after a washing test, the halo width was A decrease in the amount of antibacterial agents observed in the sample indicates that the organic synthetic antibacterial agent bleeds from the test piece, and there is a risk that the exuded organic synthetic antibacterial agent may come into direct contact with human skin.
  • an organic synthetic antibacterial agent zinc pyrithione
  • the cosmetic antibacterial sponges obtained in each example did not contain organic synthetic antibacterial agents. It can be seen that this method has the advantage of being environmentally friendly because no organic synthetic antibacterial agent is discharged.
  • the cosmetic antibacterial sponge obtained in each example uses lavender oil, tea tree oil, eucalyptus oil, lemon oil, hinokitiol oil, or neem oil, so it has sufficient antibacterial properties to exhibit antibacterial properties. It was confirmed that it showed an activity value, and no halo width was detected. Furthermore, it was confirmed that the antibacterial cosmetic sponges obtained in each example had an antibacterial activity value that was 100 times or more higher than that of the antibacterial cosmetic sponges obtained in each comparative example.
  • the cosmetic antibacterial sponges obtained in each example have excellent antibacterial retention properties since no halo width is detected, and the exudation of the plant essential oil prevents the plant essential oil from coming into contact with human skin. I know what I want. In addition, when the cosmetic antibacterial sponges obtained in each example were washed, the antibacterial properties were maintained even after washing, and the halo width was not detected, indicating excellent antibacterial maintenance properties. It can be seen that it is also excellent.
  • the cosmetic antibacterial sponges obtained in Examples 1 to 7, especially the cosmetic antibacterial sponges obtained in Examples 1 to 6, were prepared by using acrylonitrile-butadiene rubber (NBR) and peppermint oil in combination. It can be seen that this prevents the elution of vegetable essential oils, improves washing resistance, improves the ability to maintain the antibacterial properties of the sponge, and provides an excellent usability.
  • NBR acrylonitrile-butadiene rubber
  • the cosmetic antibacterial sponge of the present invention does not use conventional organic synthetic antibacterial agents, it is not only environmentally friendly and has excellent antibacterial properties, but also exudes vegetable essential oils ( It has excellent antibacterial retention properties because it is difficult to bleed (bleed), and it also has excellent washing resistance because it maintains its antibacterial properties even when washed after being coated with cosmetics such as liquid foundation and powder cosmetics. Therefore, it can be suitably used in cosmetic antibacterial applicators.

Abstract

Provided is an antimicrobial sponge for cosmetics which contains a vegetable essential oil as an essential oil component and which has excellent antimicrobial properties even without use of an organic synthetic antimicrobial agent and also has excellent antimicrobial property retainability and washability. Also provided is an antimicrobial applicator for cosmetics which comprises the antimicrobial sponge for cosmetics and which can be suitably used to, for example, apply cosmetics, such as liquid foundations and powder cosmetics, to the skin.

Description

化粧用抗菌性スポンジantibacterial sponge for cosmetics
　本発明は、化粧用抗菌性スポンジに関する。さらに詳しくは、本発明は、抗菌性、抗菌維持性および耐洗濯性に優れている化粧用抗菌性スポンジおよび当該化粧用抗菌性スポンジを有し、例えば、液状ファンデーション、粉体化粧料などの化粧料を肌に塗布する際に好適に使用することができる化粧用抗菌性塗布具に関する。 The present invention relates to a cosmetic antibacterial sponge. More specifically, the present invention has an antibacterial cosmetic sponge that is excellent in antibacterial properties, antibacterial maintenance properties, and wash resistance, and the antibacterial cosmetic sponge is suitable for use in cosmetics such as liquid foundations and powder cosmetics. The present invention relates to a cosmetic antibacterial applicator that can be suitably used when applying cosmetics to the skin.
　化粧料を化粧用具で肌に塗布するとき、当該化粧用具に肌の皮脂、剥離した皮膚などが付着する。肌の皮脂、剥離した皮膚などが付着している化粧用具をそのままの状態で放置したとき、当該化粧用具に雑菌が繁殖し、悪臭が発生することがある。そこで、化粧用具に雑菌が発生することを防止するために、抗菌剤としてジンクピリチオンなどのピリチオン金属塩系抗菌剤、チアベンダゾールなどのチアベンゾール系抗菌剤などの有機合成系抗菌剤が当該化粧用具に含有されている（例えば、特許文献１の請求項１および特許文献２の段落［００５９］参照）。 When applying cosmetics to the skin using cosmetic tools, skin sebum, peeled skin, etc. adhere to the cosmetic tools. When cosmetic tools that have skin oil, peeled skin, etc. attached to them are left as they are, bacteria may grow on the cosmetic tools and cause a bad odor. Therefore, in order to prevent the growth of germs on cosmetic tools, organic synthetic antibacterial agents such as pyrithione metal salt antibacterial agents such as zinc pyrithione and thiabendazole antibacterial agents such as thiabendazole are included in the cosmetic tools. (For example, see claim 1 of Patent Document 1 and paragraph [0059] of Patent Document 2).
　しかし、近年、人体に対する安全性および環境保護の観点から有機合成系抗菌剤の使用が規制される方向にあることから、有機合成系抗菌剤を化粧用具に使用しなくても抗菌性を有する化粧用具の開発が望まれている。 However, in recent years, the use of synthetic organic antibacterial agents has been regulated from the perspective of human safety and environmental protection. Development of tools is desired.
　また、化粧用抗菌性塗布具に化粧料が付着したとき、当該化粧用抗菌性塗布具を衛生に保つために、一般に当該化粧用抗菌性塗布具が洗浄される。しかし、有機合成系抗菌剤が使用されている化粧用抗菌性塗布具を洗浄したとき、付着した化粧料とともに有機合成系抗菌剤が化粧用抗菌性塗布具から除去されるため、当該化粧用抗菌性塗布具の抗菌性を維持することができなくなるのみならず、当該化粧用抗菌性塗布具から除去された有機合成系抗菌剤が排水されることから自然環境への影響が懸念される。 Furthermore, when cosmetics adhere to the cosmetic antibacterial applicator, the cosmetic antibacterial applicator is generally washed in order to keep the cosmetic antibacterial applicator sanitary. However, when a cosmetic antibacterial applicator containing an organic synthetic antibacterial agent is washed, the organic synthetic antibacterial agent is removed from the cosmetic antibacterial applicator along with the adhering cosmetics. Not only will it be impossible to maintain the antibacterial properties of the antibacterial cosmetic applicator, but the organic synthetic antibacterial agent removed from the antibacterial cosmetic applicator will be drained away, raising concerns about the impact on the natural environment.
特開平１０－８５０３４号公報Japanese Patent Application Publication No. 10-85034 特開２０１７－１２３９０７号公報JP2017-123907A
　本発明は、前記従来技術に鑑みてなされたものであり、有機合成系抗菌剤を使用しなくても抗菌性に優れており、抗菌維持性および耐洗濯性にも優れている化粧用抗菌性スポンジ、および当該化粧用抗菌性スポンジを有し、例えば、液状ファンデーション、粉体化粧料などの化粧料を肌に塗布する際に好適に使用することができる化粧用抗菌性塗布具を提供することを課題とする。 The present invention has been made in view of the above-mentioned prior art, and provides an antibacterial product for cosmetics that has excellent antibacterial properties even without the use of organic synthetic antibacterial agents, and has excellent antibacterial maintenance properties and washing resistance. To provide an antibacterial cosmetic applicator that includes a sponge and the antibacterial cosmetic sponge and can be suitably used, for example, when applying cosmetics such as liquid foundation and powder cosmetics to the skin. The task is to
　本発明は、
（１）　化粧用のスポンジであって、精油成分として植物性精油を含有していることを特徴とする化粧用抗菌性スポンジ、
（２）　植物性精油がペパーミント油、ラベンダー油、ティートリー油、ユーカリ油、レモン油、ヒノキチオール油およびニーム油からなる群より選ばれた少なくとも１種の植物性精油である前記（１）に記載の化粧用抗菌性スポンジ、
（３）　植物性精油がスポンジを構成しているポリマーに含有されている前記（１）に記載の化粧用抗菌性スポンジ、
（４）　スポンジを構成しているポリマーの不揮発分１００質量部あたりの植物性精油の量が０．０００２～０．９質量部である前記（３）に記載の化粧用抗菌性スポンジ、
（５）　スポンジを構成しているポリマーがアクリロニトリル－ブタジエンゴム、スチレン－ブタジエンゴム、天然ゴム、イソプレンゴム、ウレタンゴム、セルロース、ポリビニルアルコール、熱可塑性ポリエステル、ポリオレフィンおよび軟質ポリウレタンからなる群より選ばれた少なくとも１種のポリマーである前記（３）に記載の化粧用抗菌性スポンジ、
（６）　ＪＩＳ　Ｌ－１９０２（２０１５）の規定に基づく抗菌活性値が２．０以上であり、ＪＩＳ　Ｌ－１９０２（２０１５）の規定に基づくハロー幅が検出されない前記（１）～（５）のいずれかに記載の化粧用抗菌性スポンジ、および
（７）　前記（１）～（５）のいずれかに記載の化粧用抗菌性スポンジを有する化粧用抗菌性塗布具
に関する。 The present invention
(1) An antibacterial cosmetic sponge characterized by containing a vegetable essential oil as an essential oil component;
(2) The vegetable essential oil according to (1) above, wherein the vegetable essential oil is at least one vegetable essential oil selected from the group consisting of peppermint oil, lavender oil, tea tree oil, eucalyptus oil, lemon oil, hinokitiol oil, and neem oil. antibacterial sponge for cosmetics,
(3) The cosmetic antibacterial sponge according to (1) above, wherein the vegetable essential oil is contained in the polymer constituting the sponge;
(4) The cosmetic antibacterial sponge according to (3) above, wherein the amount of vegetable essential oil is 0.0002 to 0.9 parts by mass per 100 parts by mass of the nonvolatile content of the polymer constituting the sponge;
(5) The polymer constituting the sponge is selected from the group consisting of acrylonitrile-butadiene rubber, styrene-butadiene rubber, natural rubber, isoprene rubber, urethane rubber, cellulose, polyvinyl alcohol, thermoplastic polyester, polyolefin, and flexible polyurethane. The cosmetic antibacterial sponge according to (3) above, which is at least one polymer;
(6) The antibacterial activity value based on the provisions of JIS L-1902 (2015) is 2.0 or more, and the halo width based on the provisions of JIS L-1902 (2015) is not detected in the above (1) to (5). (7) A cosmetic antibacterial applicator having the cosmetic antibacterial sponge according to any one of (1) to (5) above.
　本発明によれば、有機合成系抗菌剤を使用しなくても抗菌性に優れており、抗菌維持性および耐洗濯性にも優れている化粧用抗菌性スポンジ、および当該化粧用抗菌性スポンジを有し、例えば、液状ファンデーション、粉体化粧料などの化粧料を肌に塗布する際に好適に使用することができる化粧用抗菌性塗布具が提供される。 According to the present invention, there is provided an antibacterial cosmetic sponge that has excellent antibacterial properties without using an organic synthetic antibacterial agent, and also has excellent antibacterial retention and washing resistance, and the antibacterial cosmetic sponge. Provided is a cosmetic antibacterial applicator that can be suitably used, for example, when applying cosmetics such as liquid foundations and powder cosmetics to the skin.
　本発明の化粧用抗菌性スポンジは、前記したように、精油成分として植物性精油を含有していることを特徴とする。本発明の化粧用抗菌性スポンジは、植物性精油を含有しているので、従来用いられている有機合成系抗菌剤を使用しなくても抗菌性に優れており、洗濯した後でも抗菌性が維持されることから抗菌維持性および耐洗濯性にも優れている。 As described above, the cosmetic antibacterial sponge of the present invention is characterized by containing vegetable essential oil as an essential oil component. The cosmetic antibacterial sponge of the present invention contains vegetable essential oils, so it has excellent antibacterial properties even without the use of conventionally used organic synthetic antibacterial agents, and it maintains its antibacterial properties even after washing. It also has excellent antibacterial retention and washing resistance.
　なお、本発明において、抗菌維持性は、植物性精油が化粧用抗菌性スポンジから滲出（ブリード）しがたく、植物性精油が化粧用抗菌性スポンジに保持されることによって抗菌性が維持される性質を意味する。また、本発明において、耐洗濯性は、化粧用抗菌性スポンジを洗濯した後であっても抗菌性が維持される性質を意味する。 In addition, in the present invention, the antibacterial maintenance property is that the vegetable essential oil is difficult to bleed from the cosmetic antibacterial sponge, and the antibacterial property is maintained by the vegetable essential oil being retained in the cosmetic antibacterial sponge. means quality. Furthermore, in the present invention, wash resistance means the property that antibacterial properties are maintained even after the antibacterial cosmetic sponge is washed.
　本発明の化粧用抗菌性スポンジに用いられる植物性精油は、天然由来のものであるため、一般に使用されている有機合成系抗菌剤とは区別される。植物性精油として、ペパーミント油、ラベンダー油、ティートリー油、ユーカリ油、レモン油、ヒノキチオール油およびニーム油が挙げられる。これらの植物性精油は、それぞれ単独で用いてもよく、２種類以上を併用してもよい。本発明の化粧用抗菌性スポンジに用いられる植物性精油には、前述の植物性精油以外の精油が本発明の目的を阻害しない範囲内で使用されていてもよい。 Since the vegetable essential oil used in the antibacterial cosmetic sponge of the present invention is of natural origin, it is distinguished from commonly used organic synthetic antibacterial agents. Vegetable essential oils include peppermint oil, lavender oil, tea tree oil, eucalyptus oil, lemon oil, hinokitiol oil, and neem oil. These vegetable essential oils may be used alone or in combination of two or more. The vegetable essential oil used in the cosmetic antibacterial sponge of the present invention may contain essential oils other than the above-mentioned vegetable essential oils as long as they do not impede the purpose of the present invention.
　植物性精油は、通常、複数の成分の混合物である。ペパーミント油には、メントール、メントンおよび１，８－シネオールが主成分として含まれており、その他の成分としてメチルアセテート、メントフラン、イソメントン、リモネン、ピネンなどが微量成分として含まれている。ペパーミント油に含まれる各成分の含有率は、ペパーミントの茎葉を水蒸気で蒸留するときの条件などによって異なるので一概には決定することができないが、その一例として、メントール４０～６０質量％程度、メントン１５～２５質量％程度および１，８－シネオール５～１０質量％程度を主成分として含有するペパーミント油が挙げられる。ペパーミント油は、前述の軟質発泡樹脂からなるスポンジとの親和性に優れており、植物性精油の溶出を防止し、耐洗濯性を向上させることができることから、本発明において好適に用いることができる。ラベンダー油には、主成分として酢酸リナリルが３０～４０質量％の含有率で含まれており、リモネン、リナロール、ゲラニオール、ネロール、シネオール、ｄ－ボルネオールなどの成分が含まれている。ティートリー油には、テルピネオール、シネオールなどが含まれている。ユーカリ油には、シトロネラール、シネオール、カンフェン、ピネンなどが含まれている。レモン油には、ｄ－リモネン、シトラールなどが含まれている。ヒノキチオール油には、ヒノキチオールなどが含まれている。ニーム油には、アザディラクチンなどが含まれている。 Plant essential oils are usually mixtures of multiple components. Peppermint oil contains menthol, menthone, and 1,8-cineole as main components, and other components such as methyl acetate, menthofuran, isomenthone, limonene, and pinene as minor components. The content of each component in peppermint oil cannot be definitively determined as it varies depending on the conditions used when distilling peppermint stems and leaves with steam, but examples include approximately 40-60% by mass of menthol, menthone, etc. Examples include peppermint oil containing as main components about 15 to 25% by mass and about 5 to 10% by mass of 1,8-cineole. Peppermint oil has excellent affinity with the sponge made of the above-mentioned soft foamed resin, can prevent the elution of vegetable essential oils, and can improve washing resistance, so it can be suitably used in the present invention. . Lavender oil contains linalyl acetate as a main component at a content of 30 to 40% by mass, and also contains components such as limonene, linalool, geraniol, nerol, cineole, and d-borneol. Tea tree oil contains terpineol, cineole, etc. Eucalyptus oil contains citronellal, cineole, camphene, and pinene. Lemon oil contains d-limonene and citral. Hinokitiol oil contains hinokitiol. Neem oil contains azadirachtin.
　植物性精油のなかでは、アクリロニトリル－ブタジエンゴム（ＮＢＲ）、スチレン－ブタジエンゴム（ＳＢＲ）、ウレタンゴムなどのゴム、軟質ポリウレタンフォームなどの軟質発泡樹脂などからなるスポンジとの親和性に優れており、植物性精油の溶出を防止し、耐洗濯性を向上させることができることから、ペパーミント油が好ましい。 Among vegetable essential oils, it has excellent compatibility with sponges made of rubbers such as acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), urethane rubber, and soft foamed resins such as flexible polyurethane foam. Peppermint oil is preferred because it can prevent the elution of vegetable essential oils and improve washing resistance.
　植物性精油は、スポンジを構成するポリマーに含有されていることが好ましい。植物性精油がスポンジを構成するポリマーに含有されていることには、スポンジの原料のポリマーに植物性精油があらかじめ含有されていること、スポンジを作製した後、当該スポンジを構成しているポリマーに植物性精油が吸収されていること、およびスポンジを作製した後、当該スポンジを構成しているポリマーに植物性精油が吸着されていることが含まれる。植物性精油は、化粧用抗菌性スポンジの抗菌維持性および耐洗濯性を向上させる観点から、スポンジの原料のポリマーにあらかじめ含有されていることが好ましい。 Preferably, the vegetable essential oil is contained in the polymer constituting the sponge. The reason why vegetable essential oil is contained in the polymer that makes up the sponge is that the vegetable essential oil is already contained in the polymer that is the raw material for the sponge, and that after the sponge is made, it is added to the polymer that makes up the sponge. This includes the fact that vegetable essential oil has been absorbed, and that after the sponge has been produced, the vegetable essential oil has been adsorbed onto the polymer that makes up the sponge. From the viewpoint of improving the antibacterial maintenance properties and washing resistance of the cosmetic antibacterial sponge, the vegetable essential oil is preferably contained in advance in the polymer that is the raw material of the sponge.
　スポンジを構成するポリマーの不揮発分１００質量部あたりの植物性精油の量は、当該植物性精油の種類によって異なることから一概には決定することができないが、スポンジに抗菌性を十分に付与する観点から、好ましくは０．０００２質量部以上、より好ましくは０．００１５質量部以上、さらに好ましくは０．００７５質量部以上、さらに一層好ましくは０．０１５質量部以上であり、植物性精油によるべとつきがスポンジに付与されることを低減させるとともに、植物性精油の臭いを抑制する観点から、好ましくは０．９質量部以下、より好ましくは０．６質量部以下、さらに好ましくは０．３質量部以下、さらに一層好ましくは０．１５質量部以下、特に好ましくは０．１４５質量部以下である。なお、ポリマーの不揮発分は、当該ポリマーに含まれている溶媒などの揮発性成分が除去されているポリマーを意味する。 The amount of vegetable essential oil per 100 parts by mass of non-volatile content of the polymer constituting the sponge cannot be determined unconditionally because it varies depending on the type of vegetable essential oil, but it is important from the viewpoint of imparting sufficient antibacterial properties to the sponge. The amount is preferably 0.0002 parts by mass or more, more preferably 0.0015 parts by mass or more, still more preferably 0.0075 parts by mass or more, even more preferably 0.015 parts by mass or more, and the stickiness caused by vegetable essential oils is reduced. From the viewpoint of reducing the amount of oil added to the sponge and suppressing the odor of the vegetable essential oil, it is preferably 0.9 parts by mass or less, more preferably 0.6 parts by mass or less, and even more preferably 0.3 parts by mass or less. , even more preferably 0.15 parts by mass or less, particularly preferably 0.145 parts by mass or less. Note that the nonvolatile content of a polymer means a polymer from which volatile components such as a solvent contained in the polymer have been removed.
　スポンジを構成するポリマーとしては、例えば、アクリロニトリル－ブタジエンゴム（ＮＢＲ）、スチレン－ブタジエンゴム（ＳＢＲ）、天然ゴム（ＮＲ）、イソプレンゴム（ＩＲ）、ウレタンゴムなどのゴム；カルボキシメチルセルロースなどのセルロース；ポリビニルアルコール；熱可塑性ポリエステル；ポリオレフィン；軟質ポリウレタンなどの熱可塑性樹脂などが挙げられるが、本願発明は、かかる例示のみに限定されるものではない。これらのポリマーは、それぞれ単独で用いてもよく、２種類以上を併用してもよい。 Examples of polymers constituting the sponge include rubbers such as acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), natural rubber (NR), isoprene rubber (IR), and urethane rubber; cellulose such as carboxymethyl cellulose; Examples include polyvinyl alcohol; thermoplastic polyester; polyolefin; thermoplastic resins such as flexible polyurethane; however, the present invention is not limited to these examples. These polymers may be used alone or in combination of two or more.
　前記熱可塑性ポリエステルとしては、例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレートなどが挙げられるが、本発明は、かかる例示のみに限定されるものではない。前記ポリオレフィンとしては、例えば、ポリエチレン、ポリプロピレン、エチレン－プロピレンコポリマーなどが挙げられるが、本発明は、かかる例示のみに限定されるものではない。 Examples of the thermoplastic polyester include polyethylene terephthalate and polybutylene terephthalate, but the present invention is not limited to these examples. Examples of the polyolefin include polyethylene, polypropylene, ethylene-propylene copolymer, etc., but the present invention is not limited to these examples.
　スポンジを構成するポリマーのなかでは、植物性精油との親和性に優れていることから、アクリロニトリル－ブタジエンゴム（ＮＢＲ）、スチレン－ブタジエンゴム（ＳＢＲ）、天然ゴム、イソプレンゴム、ウレタンゴムおよび軟質ポリウレタンが好ましく、スポンジの抗菌性の維持性を向上させる観点から、アクリロニトリル－ブタジエンゴム（ＮＢＲ）およびスチレン－ブタジエンゴム（ＳＢＲ）がより好ましく、アクリロニトリル－ブタジエンゴム（ＮＢＲ）がさらに好ましい。 Among the polymers that make up sponges, acrylonitrile-butadiene rubber (NBR), styrene-butadiene rubber (SBR), natural rubber, isoprene rubber, urethane rubber, and soft polyurethane are used because they have excellent affinity with vegetable essential oils. is preferred, from the viewpoint of improving the antibacterial properties of the sponge, acrylonitrile-butadiene rubber (NBR) and styrene-butadiene rubber (SBR) are more preferred, and acrylonitrile-butadiene rubber (NBR) is even more preferred.
　本発明においては、アクリロニトリル－ブタジエンゴム（ＮＢＲ）とペパーミント油との親和性に優れており、植物性精油の溶出を防止し、耐洗濯性を向上させるとともに、スポンジの抗菌性の維持性を向上させる観点から、アクリロニトリル－ブタジエンゴム（ＮＢＲ）とペパーミント油との併用が好ましい。 In the present invention, acrylonitrile-butadiene rubber (NBR) has excellent affinity with peppermint oil, prevents the elution of vegetable essential oils, improves washing resistance, and improves the antibacterial properties of the sponge. From the viewpoint of achieving this, it is preferable to use acrylonitrile-butadiene rubber (NBR) in combination with peppermint oil.
　ポリマーとしてゴムを用いる場合、当該ゴムをラテックスとして用いることができる。熱可塑性樹脂、セルロースなどのポリマーは、溶液、乳化液、懸濁液などの当該ポリマーに適した形態で用いることができる。ポリマーとしてポリオレフィンを用いる場合、加熱溶融させたポリオレフィンと植物性精油とを均一な組成となるように混練してもよい。ポリマーとして軟質ポリウレタンを用いる場合、当該軟質ポリウレタンの発泡体（軟質ポリウレタンフォーム）をスポンジとして用いることができる。 When using rubber as the polymer, the rubber can be used as latex. Polymers such as thermoplastic resins and cellulose can be used in a form suitable for the polymer, such as a solution, emulsion, or suspension. When polyolefin is used as the polymer, the heated and melted polyolefin and vegetable essential oil may be kneaded to obtain a uniform composition. When using flexible polyurethane as the polymer, a foam of the flexible polyurethane (flexible polyurethane foam) can be used as a sponge.
　本発明の化粧用抗菌性スポンジは、例えば、植物性精油とポリマーとを混合し、ポリマー中に植物性精油を分散させることによって植物性精油を含有するポリマーを調製し、当該ポリマーに、スポンジが所定の発泡倍率を有するようにポリマーに空気、窒素ガス、炭酸ガスなどの気体を混入させて当該気体の気泡をポリマー中に分散させ、当該気泡が分散しているポリマーを成形型内に充填した後、所定温度に加熱することによって化粧用抗菌性スポンジを製造する方法（以下、製法Ａという）、ポリマーと植物性精油と炭酸塩、重炭酸塩などの化学発泡剤とを混合し、得られた混合物を加熱し、化学発泡剤を分解させてポリマーを発泡させることにより、化粧用抗菌性スポンジを製造する方法（以下、製法Ｂという）、スポンジに植物性精油を含浸させた後、必要に応じて水などの溶媒を用いて当該スポンジを洗浄することによってスポンジ内で遊離している植物性精油を除去することにより、化粧用抗菌性スポンジを製造する方法（以下、製法Ｃという）などが挙げられるが、本発明は、かかる方法のみに限定されるものではない。これらの方法のなかでは、化粧用抗菌性スポンジが有する抗菌性の持続性および耐洗濯性を向上させる観点から、製法Ａおよび製法Ｂが好ましく、製法Ａがより好ましい。製法Ａおよび製法Ｂを採用した場合、植物性精油は、ポリマー中に分散するが、ポリマーの表面に存在していてもよい。 The cosmetic antibacterial sponge of the present invention can be prepared by, for example, preparing a polymer containing vegetable essential oil by mixing vegetable essential oil and a polymer and dispersing the vegetable essential oil in the polymer, and adding the sponge to the polymer. A gas such as air, nitrogen gas, carbon dioxide gas, etc. is mixed into the polymer to have a predetermined expansion ratio, the gas bubbles are dispersed in the polymer, and the polymer in which the bubbles are dispersed is filled into a mold. After that, a method of manufacturing an antibacterial cosmetic sponge by heating to a predetermined temperature (hereinafter referred to as manufacturing method A), a method of manufacturing a cosmetic antibacterial sponge by mixing a polymer, a vegetable essential oil, and a chemical blowing agent such as carbonate or bicarbonate, A method of producing an antibacterial cosmetic sponge by heating the mixture to decompose the chemical foaming agent and foaming the polymer (hereinafter referred to as production method B), after impregnating the sponge with vegetable essential oil, A method for producing an antibacterial cosmetic sponge (hereinafter referred to as production method C) by washing the sponge with a solvent such as water to remove the vegetable essential oil liberated within the sponge. However, the present invention is not limited to only such methods. Among these methods, manufacturing methods A and B are preferred, and manufacturing method A is more preferred, from the viewpoint of improving the antibacterial durability and wash resistance of the cosmetic antibacterial sponge. When manufacturing method A and manufacturing method B are adopted, the vegetable essential oil is dispersed in the polymer, but it may be present on the surface of the polymer.
　製法Ａ～製法Ｃでは、植物性精油は、そのままの状態で用いてもよく、有機溶媒溶液として用いてもよい。有機溶媒の種類は、植物性精油の種類に応じて適宜選択して用いることが好ましい。好適な有機溶媒としては、例えば、エタノールなどが挙げられるが、本発明は、かかる例示のみに限定されるものではない。植物性精油の有機溶媒溶液における植物性精油の濃度は、特に限定されず、当該植物性精油の濃度を各製法に適するように調整することが好ましい。製法Ｃでは、植物性精油の有機溶媒溶液を用いることが好ましく、植物性精油の濃度が１０～５０００ｐｐｍ程度である植物性精油の有機溶媒溶液を用いることがより好ましい。 In Production Methods A to C, the vegetable essential oil may be used as it is or as a solution in an organic solvent. The type of organic solvent is preferably selected and used appropriately depending on the type of vegetable essential oil. Examples of suitable organic solvents include ethanol, but the present invention is not limited to such examples. The concentration of the vegetable essential oil in the organic solvent solution of the vegetable essential oil is not particularly limited, and it is preferable to adjust the concentration of the vegetable essential oil to suit each production method. In production method C, it is preferable to use a solution of a vegetable essential oil in an organic solvent, and it is more preferable to use an organic solvent solution of a vegetable essential oil in which the concentration of the vegetable essential oil is about 10 to 5000 ppm.
　本発明の化粧用抗菌性スポンジでは、当該化粧用抗菌性スポンジが有する抗菌性の持続性および耐洗濯性を向上させる観点から、植物性精油を含有するポリマーに気体の気泡が分散していることが好ましい。 In the cosmetic antibacterial sponge of the present invention, gas bubbles are dispersed in the polymer containing vegetable essential oil, from the viewpoint of improving the antibacterial durability and washing resistance of the cosmetic antibacterial sponge. is preferred.
　スポンジは、独立気泡および連続気泡のいずれを有していてもよいが、スポンジ内における植物性精油の保持性を高める観点から、連続気泡を有することが好ましい。 Although the sponge may have either closed cells or open cells, it is preferable to have open cells from the viewpoint of increasing the retention of vegetable essential oil within the sponge.
　化粧用抗菌性スポンジの発泡倍率は、特に限定されないが、化粧用抗菌性スポンジを例えばパフなどの化粧用抗菌性塗布具に使用するときの使用性を向上させる観点から、３～１０倍程度であることが好ましい。なお、発泡倍率は、スポンジの体積をスポンジの原料であるポリマーの体積で除することによって得られる値である。スポンジに含まれている気泡の直径は、特に限定されないが、通常、０．０１～５０μｍ程度であることが好ましい。 The foaming ratio of the cosmetic antibacterial sponge is not particularly limited, but from the viewpoint of improving usability when the cosmetic antibacterial sponge is used as a cosmetic antibacterial applicator such as a puff, it is preferably about 3 to 10 times. It is preferable that there be. Note that the expansion ratio is a value obtained by dividing the volume of the sponge by the volume of the polymer that is the raw material for the sponge. The diameter of the bubbles contained in the sponge is not particularly limited, but it is usually preferably about 0.01 to 50 μm.
　本発明の化粧用抗菌性スポンジには、本発明の目的が阻害されない範囲内で、例えば、オリーブ油などの植物油、着色剤、芳香剤などの添加剤を含有させてもよい。添加剤は、スポンジを構成するポリマーに含有されていてもよく、スポンジを構成する気泡内に含まれていてもよい。本発明の化粧用抗菌性スポンジにオリーブ油などの植物油を含有させた場合、当該化粧用抗菌性スポンジの柔軟性を高めることができる。 The cosmetic antibacterial sponge of the present invention may contain additives such as a vegetable oil such as olive oil, a coloring agent, and a fragrance, within a range that does not impede the purpose of the present invention. The additive may be contained in the polymer constituting the sponge, or may be contained within the bubbles constituting the sponge. When the cosmetic antibacterial sponge of the present invention contains a vegetable oil such as olive oil, the flexibility of the cosmetic antibacterial sponge can be increased.
　以上のようにして本発明の化粧用抗菌性スポンジを得ることができる。本発明の化粧用抗菌性スポンジは、従来の有機合成系抗菌剤を使用しなくても抗菌性を有し、例えば、液状ファンデーション、粉体化粧料などの化粧料が付着した後に当該化粧用抗菌性スポンジを洗濯した後でも抗菌性を維持することができことから耐洗濯性に優れているので、化粧用抗菌性塗布具に好適に使用することができる。 The cosmetic antibacterial sponge of the present invention can be obtained in the manner described above. The cosmetic antibacterial sponge of the present invention has antibacterial properties even without the use of conventional organic synthetic antibacterial agents. Since the antibacterial property can be maintained even after the sponge is washed, it has excellent washing resistance and can be suitably used as an antibacterial applicator for cosmetics.
　本発明の化粧用抗菌性スポンジのなかでは、アクリロニトリル－ブタジエンゴム（ＮＢＲ）とペパーミント油との親和性に優れており、植物性精油の溶出を防止し、耐洗濯性を向上させるとともに、スポンジの抗菌性の維持性を向上させる観点から、アクリロニトリル－ブタジエンゴム（ＮＢＲ）とペパーミント油とが併用されており、ペパーミント油を含有するアクリロニトリル－ブタジエンゴム（ＮＢＲ）に気泡が分散しているスポンジが好ましい。 Among the cosmetic antibacterial sponges of the present invention, acrylonitrile-butadiene rubber (NBR) has excellent affinity with peppermint oil, prevents the elution of vegetable essential oils, improves washing resistance, and improves the sponge's washing resistance. From the viewpoint of improving the maintenance of antibacterial properties, it is preferable to use a sponge in which acrylonitrile-butadiene rubber (NBR) and peppermint oil are used together, and air bubbles are dispersed in the acrylonitrile-butadiene rubber (NBR) containing peppermint oil. .
　化粧用抗菌性スポンジにおける植物性精油、有機合成系抗菌剤などの成分の種類およびその含有率は、液体クロマトグラフィー、ガスクロマトグラフィーなどの分析機器を用いて特定することができる。より具体的には、化粧用抗菌性スポンジにおける植物性精油、有機合成系抗菌剤などの成分の種類およびその含有率は、例えば、化粧用抗菌性スポンジに含まれている成分を抽出溶媒で抽出することによって抽出液を調製し、ガスクロマトグラフィーを用いて当該抽出液の保持時間（リテンションタイム）および各成分のピークの大きさを調べることにより、各成分の定性分析および定量分析を行なうことができる。 The type and content of components such as vegetable essential oils and organic synthetic antibacterial agents in cosmetic antibacterial sponges can be determined using analytical instruments such as liquid chromatography and gas chromatography. More specifically, the types and content of ingredients such as vegetable essential oils and organic synthetic antibacterial agents in cosmetic antibacterial sponges can be determined by, for example, extracting the ingredients contained in cosmetic antibacterial sponges with an extraction solvent. Qualitative and quantitative analysis of each component can be performed by preparing an extract by using gas chromatography and examining the retention time and peak size of each component using gas chromatography. can.
　本発明の化粧用抗菌性スポンジは、ＪＩＳ　Ｌ－１９０２（２０１５）の規定、より具体的には以下の実施例に記載の測定方法に基づいて測定された抗菌活性値が２．０以上であり、ハロー幅が検出されないことから、抗菌維持性に優れている。 The cosmetic antibacterial sponge of the present invention has an antibacterial activity value of 2.0 or more as measured based on the provisions of JIS L-1902 (2015), more specifically, according to the measurement method described in the following examples. , the halo width is not detected, so it has excellent antibacterial retention.
　本発明の化粧用抗菌性塗布具は、前記化粧用抗菌性スポンジを有する。化粧用抗菌性塗布具としては、例えば、化粧用スポンジパフ、洗顔用スポンジ、化粧用チップなどが挙げられるが、本発明は、かかる例示のみに限定されるものではない。化粧用スポンジパフは、化粧料をスポンジパフに取り、当該化粧料をヒトの皮膚に塗布する際に用いられるスポンジパフである。洗顔用スポンジは、洗顔料をスポンジに取り、当該洗顔料をヒトの顔の皮膚に塗布する際に用いられるスポンジである。 The cosmetic antibacterial applicator of the present invention includes the cosmetic antibacterial sponge. Examples of cosmetic antibacterial applicators include cosmetic sponge puffs, facial cleansing sponges, and cosmetic chips, but the present invention is not limited to these examples. Cosmetic sponge puffs are sponge puffs that are used to take cosmetics into a sponge puff and apply the cosmetics to human skin. A facial cleansing sponge is a sponge used to pick up a facial cleanser on a sponge and apply the facial cleanser to the skin of a human face.
　本発明の化粧用抗菌性塗布具は、例えば、化粧用抗菌性スポンジの製法Ａ～Ｃを利用して作製することができる。 The cosmetic antibacterial applicator of the present invention can be manufactured using, for example, the manufacturing methods A to C of cosmetic antibacterial sponges.
　例えば、化粧用抗菌性スポンジの製法Ａを利用して化粧用抗菌性塗布具を作製する場合、植物性精油とポリマーとを混合し、ポリマー中に植物性精油を分散させることによって植物性精油を含有するポリマーを調製し、当該ポリマーに、スポンジが所定の発泡倍率を有するように空気などの気体を混入させて当該気体の気泡をポリマー中に分散させ、当該気体の気泡が分散しているポリマーを所定形状の化粧用抗菌性塗布具に対応する内面形状を有する成形型内に充填し、当該成形型を８０～１３０℃程度の温度に加熱することによって化粧用抗菌性スポンジを成形し、得られた化粧用抗菌性スポンジを成形型から取り出し、必要に応じて所定の厚さとなるように裁断することにより、化粧用抗菌性塗布具を作製することができる。 For example, when manufacturing an antibacterial cosmetic applicator using manufacturing method A of an antibacterial cosmetic sponge, vegetable essential oil is mixed with a polymer, and the vegetable essential oil is dispersed in the polymer. A polymer in which the gas bubbles are dispersed is prepared by mixing a gas such as air into the polymer so that the sponge has a predetermined expansion ratio, and dispersing the gas bubbles in the polymer. A cosmetic antibacterial sponge is formed by filling a mold with an inner surface shape corresponding to a cosmetic antibacterial applicator of a predetermined shape and heating the mold to a temperature of about 80 to 130°C. An antibacterial cosmetic applicator can be produced by removing the antibacterial cosmetic sponge from the mold and cutting it to a predetermined thickness as necessary.
　例えば、化粧用抗菌性スポンジの製法Ｂを利用して化粧用抗菌性塗布具を作製する場合、ポリマーと植物性精油と化学発泡剤とを混合し、得られた混合物を所定形状の化粧用抗菌性塗布具に対応する内面形状を有する成形型内に充填し、当該成形型を８０～１３０℃程度の温度に加熱することによって化学発泡剤を分解させてポリマーを発泡させ、ポリマー中に植物性精油を含有する化粧用抗菌性スポンジを成形し、得られた化粧用抗菌性スポンジを成形型から取り出し、必要に応じて所定の厚さとなるように裁断することにより、化粧用抗菌性塗布具を作製することができる。 For example, when manufacturing an antibacterial cosmetic applicator using manufacturing method B of an antibacterial cosmetic sponge, a polymer, a vegetable essential oil, and a chemical foaming agent are mixed, and the resulting mixture is used to form an antibacterial cosmetic applicator into a predetermined shape. The chemical foaming agent is decomposed and the polymer is foamed by heating the mold to a temperature of approximately 80 to 130°C. A cosmetic antibacterial applicator is produced by molding a cosmetic antibacterial sponge containing essential oil, taking out the obtained cosmetic antibacterial sponge from the mold, and cutting it to a predetermined thickness as necessary. It can be made.
　例えば、化粧用抗菌性スポンジの製法Ｃを利用して化粧用抗菌性塗布具を作製する場合、スポンジに植物性精油を含浸させて化粧用抗菌性スポンジを作製した後、必要に応じて水などの溶媒を用いて当該化粧用抗菌性スポンジを洗浄することによってスポンジ内で遊離して付着している植物性精油を除去し、当該化粧用抗菌性スポンジを必要に応じて所定の厚さとなるように裁断することにより、化粧用抗菌性塗布具を作製することができる。 For example, when manufacturing an antibacterial cosmetic applicator using manufacturing method C for an antibacterial cosmetic sponge, the sponge is impregnated with vegetable essential oil to create an antibacterial cosmetic sponge, and then water etc. are added as needed. By washing the cosmetic antibacterial sponge with a solvent of By cutting it into pieces, an antibacterial cosmetic applicator can be produced.
　本発明の化粧用抗菌性塗布具は、本発明の化粧用抗菌性スポンジが使用されていることから、有機合成系抗菌剤を使用しなくても抗菌性に優れており、抗菌維持性および耐洗濯性にも優れており、例えば、液状ファンデーション、粉体化粧料などの化粧料を肌に塗布する際に好適に使用することができる。 Since the cosmetic antibacterial applicator of the present invention uses the cosmetic antibacterial sponge of the present invention, it has excellent antibacterial properties without using an organic synthetic antibacterial agent, and has excellent antibacterial maintenance and resistance. It also has excellent washability, and can be suitably used, for example, when applying cosmetics such as liquid foundations and powder cosmetics to the skin.
　次に、本発明の化粧用抗菌性スポンジを実施例に基づいてさらに詳細に説明するが、本発明は、かかる実施例のみに限定されるものではない。 Next, the cosmetic antibacterial sponge of the present invention will be explained in more detail based on Examples, but the present invention is not limited to these Examples.
実施例１～８
　スポンジを構成するポリマーとしてＮＢＲラテックス〔日本ゼオン（株）製、商品名：ＮＩＰＯＬ　ＬＸ５３１Ｂ、樹脂固形分含量：６０質量％）１００質量部、加硫剤として硫黄〔細井化学（株）製〕１．３質量部、加硫促進剤〔川口化学（株）製、商品名：アクセルＭＺ〕１．５質量部、加硫助剤〔ユニロイヤル（株）製、商品名：トリメンベース〕１．０質量部、酸化防止剤〔川口化学（株）製、商品名：アンテージＢＨＴ〕１．５質量部およびケイフッ化ソーダ〔三井東圧化学（株）製〕３．０質量部を均一な組成となるように混合することにより、ラテックス組成物を調製した。 Examples 1 to 8
100 parts by mass of NBR latex [manufactured by Nippon Zeon Co., Ltd., product name: NIPOL LX531B, resin solid content: 60 mass%] as a polymer constituting the sponge, sulfur as a vulcanizing agent [manufactured by Hosoi Chemical Co., Ltd.]1. 3 parts by mass, vulcanization accelerator [manufactured by Kawaguchi Chemical Co., Ltd., trade name: Accel MZ] 1.5 parts by mass, vulcanization aid [manufactured by Uniroyal Co., Ltd., trade name: Trimenbase] 1.0 parts by mass 1.5 parts by mass of antioxidant [manufactured by Kawaguchi Chemical Co., Ltd., trade name: ANTAGE BHT] and 3.0 parts by mass of sodium fluorosilicide [manufactured by Mitsui Toatsu Chemical Co., Ltd.] so as to have a uniform composition. A latex composition was prepared by mixing.
　前記で得られたラテックス組成物に含まれているＮＢＲラテックスの不揮発分１００質量部あたり表１に示す植物性精油を表１に示す量で当該ラテックス組成物に添加し、均一な組成となるように混合することにより、混合物を調製した。 The vegetable essential oil shown in Table 1 was added to the latex composition in the amount shown in Table 1 per 100 parts by mass of non-volatile content of the NBR latex contained in the latex composition obtained above, so as to obtain a uniform composition. A mixture was prepared by mixing.
　前記で得られた混合物に空気を混入させることにより、当該混合物を５倍の体積に発泡させた後（発泡倍率：５倍）、当該混合物を内径が５５ｍｍであるアルミニウム製の円筒状体内に注入した。引き続いて、この円筒状体を１２０℃で２５分間加熱することにより、円柱状のスポンジを得た。前記で得られたスポンジを円筒状体から取り出し、水洗し、乾燥させた後、厚さが８ｍｍとなるように裁断し、縁部を研磨することにより、化粧用抗菌性スポンジを作製した。得られた化粧用抗菌性スポンジは、いずれも、連続気泡を有していた。 By mixing air into the mixture obtained above, the mixture is foamed to 5 times the volume (foaming ratio: 5 times), and then the mixture is injected into an aluminum cylindrical body with an inner diameter of 55 mm. did. Subsequently, this cylindrical body was heated at 120° C. for 25 minutes to obtain a cylindrical sponge. The sponge obtained above was taken out from the cylindrical body, washed with water, dried, cut to a thickness of 8 mm, and the edges were polished to produce an antibacterial cosmetic sponge. All of the obtained cosmetic antibacterial sponges had open cells.
〔抗菌性〕
　ＪＩＳ　Ｌ－１９０２（２０１５）の規定に基づき、抗菌性を評価するために抗菌活性値を調べた。なお、化粧用抗菌性スポンジの異なる３箇所からスポンジ片０．４ｇを採取し、これを試験片とした。 [Antibacterial]
Based on the provisions of JIS L-1902 (2015), antibacterial activity values were examined to evaluate antibacterial properties. Note that 0.4 g of sponge pieces were collected from three different locations on the cosmetic antibacterial sponge and used as test pieces.
　黄色ブドウ球菌（初発菌数：１．５×１０5ＣＦＵ／ｍＬ）を含む寒天培地上に試験片を載置し、３７℃の恒温室内で菌を１８時間培養した後、試験片を水洗することによって菌を洗い出し、生残菌数Ａ（ＣＦＵ／ｍＬ）を測定した。なお、ＣＦＵ（colony forming unit）は、コロニー形成単位を示す。 Place the test piece on an agar medium containing Staphylococcus aureus (initial number of bacteria: 1.5 x 10 5 CFU/mL), culture the bacteria in a thermostatic chamber at 37°C for 18 hours, and then wash the test piece with water. Bacteria were washed out by this, and the number of surviving bacteria A (CFU/mL) was measured. Note that CFU (colony forming unit) indicates a colony forming unit.
　対照として試験片を寒天培地上に載置していないものについて前記と同様にして３７℃の恒温室内で菌を１８時間培養した後、試験片を水洗することによって菌を洗い出し、生残菌数Ｂ（ＣＦＵ／ｍＬ）を測定した。 As a control, the test piece was not placed on the agar medium, and after culturing the bacteria in a thermostatic chamber at 37°C for 18 hours in the same manner as described above, the bacteria were washed out by washing the test piece with water, and the number of surviving bacteria was determined. B (CFU/mL) was measured.
　次に、式：
［抗菌活性値］＝ｌｏｇ（生残菌数Ｂ／生残菌数Ａ）
に基づいて抗菌活性値を求め、以下の評価基準に基づいて抗菌性を評価した。
（評価基準）
◎：抗菌活性値が５．５以上である（合格）。
○：抗菌活性値が２．０以上５．５未満である（合格）。
×：抗菌活性値が２．０未満である（不合格）。 Then the formula:
[Antibacterial activity value] = log (number of surviving bacteria B/number of surviving bacteria A)
The antibacterial activity value was determined based on the following, and the antibacterial property was evaluated based on the following evaluation criteria.
(Evaluation criteria)
◎: Antibacterial activity value is 5.5 or more (pass).
○: Antibacterial activity value is 2.0 or more and less than 5.5 (pass).
×: Antibacterial activity value is less than 2.0 (fail).
〔抗菌維持性〕
　ＪＩＳ　Ｌ－１９０２（２０１５）の規定に基づき、抗菌持続性を評価するためにハロー幅を調べた。なお、化粧用抗菌性スポンジの異なる３箇所からスポンジ片０．４ｇを採取し、これを試験片とした。 [Antibacterial maintenance]
Based on the provisions of JIS L-1902 (2015), the halo width was examined to evaluate antibacterial durability. Note that 0.4 g of sponge pieces were collected from three different locations on the cosmetic antibacterial sponge and used as test pieces.
　黄色ブドウ球菌の菌液１ｍＬ（初発菌数：１．５×１０5ＣＦＵ／ｍＬ）と約４５℃に調整された寒天培地１５ｍＬとをシャーレ内で混合した後、当該寒天培地を室温に冷却させることによって凝固させた。余剰水は、シャーレを傾けることによって除去した。 After mixing 1 mL of Staphylococcus aureus bacterial solution (initial number of bacteria: 1.5 x 10 5 CFU/mL) and 15 mL of agar medium adjusted to approximately 45°C in a Petri dish, the agar medium is cooled to room temperature. It was solidified by this. Excess water was removed by tilting the Petri dish.
　次に、シャーレ内の寒天培地の表面に試験片を密着させて３７℃の恒温室内で２４時間菌を培養させた後、試験片の周囲に形成されたハロー幅を計測し、式：
［ハロー幅（ｍｍ）］＝［〔ハローの直径（ｍｍ）〕－〔試験片の長さ（ｍｍ）〕］／２
に基づいてハロー幅を求め、以下の評価基準に基づいて抗菌維持性を評価した。なお、ハロー幅が小さいほど、抗菌維持性に優れている。 Next, the test piece was placed in close contact with the surface of the agar medium in the petri dish, and the bacteria were cultured for 24 hours in a thermostatic chamber at 37°C. The width of the halo formed around the test piece was measured, and the formula:
[Harrow width (mm)] = [[Harrow diameter (mm)] - [Length of test piece (mm)]]/2
The halo width was determined based on the following, and antibacterial maintenance was evaluated based on the following evaluation criteria. Note that the smaller the halo width is, the better the antibacterial maintenance property is.
（評価基準）
◎：ハロー幅が検出されない（合格）。
×：ハロー幅が検出され、１ｍｍ未満である（不合格）。
××：ハロー幅が１ｍｍ以上である（不合格）。 (Evaluation criteria)
◎: Halo width is not detected (pass).
×: The halo width was detected and was less than 1 mm (fail).
XX: The halo width is 1 mm or more (fail).
〔耐洗濯性〕
　ＪＩＳ　Ｌ－１０４２（２０１５）の規定に基づき、中性洗剤の濃度が０．１質量％であり、水温が４０℃である水溶液に試験片を３０分間浸漬した後、手で１００回揉み洗いを行なった後、前記と同様にして試験片の抗菌性および抗菌維持性を評価した。 [Washing resistance]
Based on the provisions of JIS L-1042 (2015), the test piece was immersed in an aqueous solution with a neutral detergent concentration of 0.1% by mass and a water temperature of 40°C for 30 minutes, and then rubbed and washed by hand 100 times. After that, the antibacterial properties and antibacterial maintenance properties of the test pieces were evaluated in the same manner as above.
〔使用感〕
　洗濯試験前の試験片の臭気およびべとつき感を調べ、以下の評価基準に基づいて使用感を評価した。 [Feeling of use]
The odor and sticky feeling of the test piece before the washing test were examined, and the feeling of use was evaluated based on the following evaluation criteria.
（評価基準）
◎：試験片に臭気およびべとつき感が殆ど認められず、実使用に支障がない（合格）。
〇：試験片に臭気またはべとつき感がやや認められるが、実使用に支障がない（合格）。
△：試験片に臭気またはべとつき感が認められるが、実使用が可能である（合格）。
×：試験片に実使用に支障が生じる臭気またはべとつき感が認められる（不合格）。 (Evaluation criteria)
◎: Almost no odor or sticky feeling was observed in the test piece, and there was no problem in actual use (passed).
○: Slight odor or sticky feeling is observed in the test piece, but it does not interfere with actual use (passed).
△: Odor or sticky feeling is observed in the test piece, but it can be used in practice (passed).
×: The test piece has an odor or a sticky feeling that interferes with actual use (fail).
〔有機合成系抗菌剤の不使用〕
　試験片に有機合成系抗菌剤が使用されているかどうかを指標として、以下の評価基準に基づいて有機合成系抗菌剤の使用を評価した。 [No use of organic synthetic antibacterial agents]
Using whether or not an organic synthetic antibacterial agent was used in the test piece as an index, the use of the organic synthetic antibacterial agent was evaluated based on the following evaluation criteria.
（評価基準）
◎：試験片に有機合成系抗菌剤が使用されていない。
×：試験片に有機合成系抗菌剤が使用されている。 (Evaluation criteria)
◎: No organic synthetic antibacterial agent was used in the test piece.
×: An organic synthetic antibacterial agent is used in the test piece.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
実施例３７～４１
　スポンジを構成するポリマーとしてＮＢＲラテックス〔日本ゼオン（株）製、商品名：ＮＩＰＯＬ　ＬＸ５３１Ｂ、樹脂固形分含量：６０質量％）１００質量部、加硫剤として硫黄〔細井化学（株）製〕１．３質量部、加硫促進剤〔川口化学（株）製、商品名：アクセルＭＺ〕１．５質量部、加硫助剤〔ユニロイヤル（株）製、商品名：トリメンベース〕１．０質量部、酸化防止剤〔川口化学（株）製、商品名：アンテージＢＨＴ〕１．５質量部およびケイフッ化ソーダ〔三井東圧化学（株）製〕３．０質量部を均一な組成となるように混合することにより、ラテックス組成物を調製した。 Examples 37-41
100 parts by mass of NBR latex [manufactured by Nippon Zeon Co., Ltd., product name: NIPOL LX531B, resin solid content: 60 mass%] as a polymer constituting the sponge, sulfur as a vulcanizing agent [manufactured by Hosoi Chemical Co., Ltd.]1. 3 parts by mass, vulcanization accelerator [manufactured by Kawaguchi Chemical Co., Ltd., trade name: Accel MZ] 1.5 parts by mass, vulcanization aid [manufactured by Uniroyal Co., Ltd., trade name: Trimenbase] 1.0 parts by mass 1.5 parts by mass of antioxidant [manufactured by Kawaguchi Chemical Co., Ltd., trade name: ANTAGE BHT] and 3.0 parts by mass of sodium fluorosilicide [manufactured by Mitsui Toatsu Chemical Co., Ltd.] so as to have a uniform composition. A latex composition was prepared by mixing.
　前記で得られたラテックス組成物に空気を混入させることにより、当該ラテックス組成物を５倍の体積に発泡させた後（発泡倍率：５倍）、当該ラテックス組成物を内径が５５ｍｍであるアルミニウム製の円筒状体内に注入した。引き続いて、この円筒状体を１２０℃で２５分間加熱することにより、円柱状のスポンジを得た。前記で得られたスポンジを円筒状体から取り出し、水洗し、乾燥させた後、厚さが８ｍｍとなるように裁断し、縁部を研磨することにより、化粧用スポンジを作製した。 By mixing air into the latex composition obtained above, the latex composition was foamed to a volume of 5 times (foaming ratio: 5 times), and then the latex composition was foamed into a mold made of aluminum having an inner diameter of 55 mm. was injected into a cylindrical body. Subsequently, this cylindrical body was heated at 120° C. for 25 minutes to obtain a cylindrical sponge. The sponge obtained above was taken out from the cylindrical body, washed with water, dried, cut to a thickness of 8 mm, and the edges were polished to produce a cosmetic sponge.
　次に、表２に示すペパーミント油の濃度を有するペパーミント油のエタノール溶液（液温：２３℃）中に前記で得られた化粧用スポンジを１時間浸漬させた後、当該化粧用スポンジを前記エタノール溶液から取り出し、当該化粧用スポンジを水洗することにより、当該化粧用スポンジ内で遊離しているペパーミント油を除去し、内温が８０℃である乾燥機で当該化粧用スポンジを３時間乾燥させることにより、化粧用抗菌性スポンジを作製した。得られた化粧用抗菌性スポンジは、いずれも、連続気泡を有していた。 Next, the cosmetic sponge obtained above was immersed for 1 hour in an ethanol solution of peppermint oil (liquid temperature: 23°C) having the concentration of peppermint oil shown in Table 2, and then the cosmetic sponge was immersed in the ethanol solution (liquid temperature: 23°C). Remove the cosmetic sponge from the solution, wash the cosmetic sponge with water to remove peppermint oil that is free within the cosmetic sponge, and dry the cosmetic sponge for 3 hours in a dryer with an internal temperature of 80°C. A cosmetic antibacterial sponge was created using this method. All of the obtained cosmetic antibacterial sponges had open cells.
　次に、前記で得られた化粧用抗菌性スポンジの物性を実施例１と同様にして評価した。その結果を表２に示す。 Next, the physical properties of the cosmetic antibacterial sponge obtained above were evaluated in the same manner as in Example 1. The results are shown in Table 2.
Figure JPOXMLDOC01-appb-T000002
Figure JPOXMLDOC01-appb-T000002
比較例１～９
　実施例１において、ＮＢＲラテックスの不揮発分１００質量部あたりペパーミント油０．０００２質量部を用いる代わりに表３に示す有機合成系抗菌剤を表３に示す量で用いたこと以外は、実施例１と同様にして化粧用抗菌性スポンジを作製した。 Comparative examples 1 to 9
Example 1 except that the organic synthetic antibacterial agent shown in Table 3 was used in the amount shown in Table 3 instead of using 0.0002 parts by mass of peppermint oil per 100 parts by mass of nonvolatile content of NBR latex in Example 1. A cosmetic antibacterial sponge was prepared in the same manner as above.
　次に、各比較例で得られた化粧用抗菌性スポンジを用いて実施例１と同様にして物性を評価した。その結果を表３に示す。なお、抗菌維持性のカッコ内の数値は、検出されたハロー幅を示す。 Next, the physical properties were evaluated in the same manner as in Example 1 using the cosmetic antibacterial sponges obtained in each comparative example. The results are shown in Table 3. Note that the numerical value in parentheses for antibacterial maintenance property indicates the detected halo width.
　なお、表３において、有機合成系抗菌剤の各略号は、以下のことを意味する。
ＺＰＴ：ジンクピリチオン
ＩＰＢＣ：ブチルカルバミン酸ヨウ化プロピル
ＣＣＲ：クロロクレゾール In addition, in Table 3, each abbreviation of the organic synthetic antibacterial agent means the following.
ZPT: Zinc pyrithione IPBC: Propyl butylcarbamate iodide CCR: Chlorocresol
Figure JPOXMLDOC01-appb-T000003
Figure JPOXMLDOC01-appb-T000003
　表３に示された結果から、各比較例では、化粧用抗菌性スポンジに有機合成系抗菌剤が使用されていることから、当該化粧用抗菌性スポンジから除去された有機合成系抗菌剤が排水されるので自然環境への影響が懸念されることがわかる。また、各比較例で得られた化粧用抗菌性スポンジは、耐洗濯性または使用感に劣り、ハロー幅が確認されたことから抗菌維持性に劣ることがわかる。また、比較例１で得られた化粧用抗菌性スポンジには、有機合成系抗菌剤（ジンクピリチオン）が使用されており、ハロー幅（細菌の発育阻止幅）が認められ、さらに洗濯試験後にハロー幅の減少が認められることから、有機合成系抗菌剤が試験片から滲出（ブリード）し、滲出した有機合成系抗菌剤が直接的にヒトの肌に接触するおそれがあることがわかる。 From the results shown in Table 3, in each comparative example, since an organic synthetic antibacterial agent is used in the cosmetic antibacterial sponge, the organic synthetic antibacterial agent removed from the cosmetic antibacterial sponge is It can be seen that there are concerns about the impact on the natural environment. In addition, the cosmetic antibacterial sponges obtained in each comparative example were inferior in wash resistance or usability, and the halo width was observed, indicating that they were inferior in antibacterial retention. In addition, the cosmetic antibacterial sponge obtained in Comparative Example 1 uses an organic synthetic antibacterial agent (zinc pyrithione), and a halo width (bacterial growth inhibition width) was observed, and after a washing test, the halo width was A decrease in the amount of antibacterial agents observed in the sample indicates that the organic synthetic antibacterial agent bleeds from the test piece, and there is a risk that the exuded organic synthetic antibacterial agent may come into direct contact with human skin.
　これに対して、各実施例で得られた化粧用抗菌性スポンジは、表１および表２に示されるように、有機合成系抗菌剤が使用されていないことから、当該化粧用抗菌性スポンジから有機合成系抗菌剤が排出されることがないので、自然環境に優しいという利点を有することがわかる。 On the other hand, as shown in Tables 1 and 2, the cosmetic antibacterial sponges obtained in each example did not contain organic synthetic antibacterial agents. It can be seen that this method has the advantage of being environmentally friendly because no organic synthetic antibacterial agent is discharged.
　また、各実施例で得られた化粧用抗菌性スポンジは、ラベンダー油、ティートリー油、ユーカリ油、レモン油、ヒノキチオール油またはニーム油が用いられているので、抗菌性を発揮するのに充分な抗菌活性値を示すことが確認され、ハロー幅が検出されなかった。また、各実施例で得られた化粧用抗菌性スポンジは、各比較例で得られた化粧用抗菌性スポンジと対比して、抗菌活性値が１００倍以上高いことが確認された。 In addition, the cosmetic antibacterial sponge obtained in each example uses lavender oil, tea tree oil, eucalyptus oil, lemon oil, hinokitiol oil, or neem oil, so it has sufficient antibacterial properties to exhibit antibacterial properties. It was confirmed that it showed an activity value, and no halo width was detected. Furthermore, it was confirmed that the antibacterial cosmetic sponges obtained in each example had an antibacterial activity value that was 100 times or more higher than that of the antibacterial cosmetic sponges obtained in each comparative example.
　したがって、各実施例で得られた化粧用抗菌性スポンジは、ハロー幅が検出されないことから抗菌維持性に優れており、植物性精油の滲出により、当該植物性精油がヒトの肌に接触しがたいことがわかる。また、各実施例で得られた化粧用抗菌性スポンジを洗濯したとき、当該洗濯後でも抗菌性が維持されており、ハロー幅が検出されないので抗菌維持性に優れていることから、耐洗濯性にも優れていることがわかる。 Therefore, the cosmetic antibacterial sponges obtained in each example have excellent antibacterial retention properties since no halo width is detected, and the exudation of the plant essential oil prevents the plant essential oil from coming into contact with human skin. I know what I want. In addition, when the cosmetic antibacterial sponges obtained in each example were washed, the antibacterial properties were maintained even after washing, and the halo width was not detected, indicating excellent antibacterial maintenance properties. It can be seen that it is also excellent.
　さらに、実施例１～７で得られた化粧用抗菌性スポンジ、なかでも実施例１～６で得られた化粧用抗菌性スポンジは、アクリロニトリル－ブタジエンゴム（ＮＢＲ）とペパーミント油とが併用されているので、植物性精油の溶出を防止し、耐洗濯性を向上させるとともに、スポンジの抗菌性の維持性を向上させ、使用感にも優れていることがわかる。 Furthermore, the cosmetic antibacterial sponges obtained in Examples 1 to 7, especially the cosmetic antibacterial sponges obtained in Examples 1 to 6, were prepared by using acrylonitrile-butadiene rubber (NBR) and peppermint oil in combination. It can be seen that this prevents the elution of vegetable essential oils, improves washing resistance, improves the ability to maintain the antibacterial properties of the sponge, and provides an excellent usability.
　したがって、本発明の化粧用抗菌性スポンジは、従来の有機合成系抗菌剤が使用されていないので、自然環境に優しく、優れた抗菌性を有しているのみならず、植物性精油が滲出（ブリード）しがたいので抗菌維持性に優れており、例えば、液状ファンデーション、粉体化粧料などの化粧料が付着した後に洗濯したときでも当該抗菌性が維持されることから耐洗濯性にも優れているので、化粧用抗菌性塗布具に好適に使用することができる。 Therefore, since the cosmetic antibacterial sponge of the present invention does not use conventional organic synthetic antibacterial agents, it is not only environmentally friendly and has excellent antibacterial properties, but also exudes vegetable essential oils ( It has excellent antibacterial retention properties because it is difficult to bleed (bleed), and it also has excellent washing resistance because it maintains its antibacterial properties even when washed after being coated with cosmetics such as liquid foundation and powder cosmetics. Therefore, it can be suitably used in cosmetic antibacterial applicators.

Claims (7)

  1. 　化粧用のスポンジであって、精油成分として植物性精油を含有していることを特徴とする化粧用抗菌性スポンジ。 An antibacterial cosmetic sponge characterized by containing vegetable essential oil as an essential oil component.
  2. 　植物性精油がペパーミント油、ラベンダー油、ティートリー油、ユーカリ油、レモン油、ヒノキチオール油およびニーム油からなる群より選ばれた少なくとも１種の植物性精油である請求項１に記載の化粧用抗菌性スポンジ。 Antibacterial cosmetics according to claim 1, wherein the vegetable essential oil is at least one vegetable essential oil selected from the group consisting of peppermint oil, lavender oil, tea tree oil, eucalyptus oil, lemon oil, hinokitiol oil, and neem oil. sponge.
  3. 　植物性精油がスポンジを構成しているポリマーに含有されている請求項１に記載の化粧用抗菌性スポンジ。 The cosmetic antibacterial sponge according to claim 1, wherein the vegetable essential oil is contained in the polymer constituting the sponge.
  4. 　スポンジを構成しているポリマーの不揮発分１００質量部あたりの植物性精油の量が０．０００２～０．９質量部である請求項３に記載の化粧用抗菌性スポンジ。 The cosmetic antibacterial sponge according to claim 3, wherein the amount of the vegetable essential oil is 0.0002 to 0.9 parts by mass per 100 parts by mass of the nonvolatile content of the polymer constituting the sponge.
  5. 　スポンジを構成しているポリマーがアクリロニトリル－ブタジエンゴム、スチレン－ブタジエンゴム、天然ゴム、イソプレンゴム、ウレタンゴム、セルロース、ポリビニルアルコール、熱可塑性ポリエステル、ポリオレフィンおよび軟質ポリウレタンからなる群より選ばれた少なくとも１種のポリマーである請求項３に記載の化粧用抗菌性スポンジ。 The polymer constituting the sponge is at least one selected from the group consisting of acrylonitrile-butadiene rubber, styrene-butadiene rubber, natural rubber, isoprene rubber, urethane rubber, cellulose, polyvinyl alcohol, thermoplastic polyester, polyolefin, and soft polyurethane. The cosmetic antibacterial sponge according to claim 3, which is a polymer of.
  6. 　ＪＩＳ　Ｌ－１９０２（２０１５）の規定に基づく抗菌活性値が２．０以上であり、ＪＩＳ　Ｌ－１９０２（２０１５）の規定に基づくハロー幅が検出されない請求項１～５のいずれかに記載の化粧用抗菌性スポンジ。 The cosmetic according to any one of claims 1 to 5, which has an antibacterial activity value of 2.0 or more based on the regulations of JIS L-1902 (2015), and no halo width is detected based on the regulations of JIS L-1902 (2015). antibacterial sponge.
  7. 　請求項１～５のいずれかに記載の化粧用抗菌性スポンジを有する化粧用抗菌性塗布具。 A cosmetic antibacterial applicator comprising the cosmetic antibacterial sponge according to any one of claims 1 to 5.
PCT/JP2023/008461 2022-03-08 2023-03-07 Antimicrobial sponge for cosmetics WO2023171641A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09241413A (en) * 1996-03-08 1997-09-16 Suzuki Sogyo Co Ltd Antimicrobiotic flexible synthetic resin foam
JP2003511127A (en) * 1999-10-08 2003-03-25 ザ、プロクター、エンド、ギャンブル、カンパニー Semi-closed applicator for dispersing substance on target surface
JP2017160317A (en) * 2016-03-09 2017-09-14 三井化学産資株式会社 Rat-repelling urethane foam and method for producing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09241413A (en) * 1996-03-08 1997-09-16 Suzuki Sogyo Co Ltd Antimicrobiotic flexible synthetic resin foam
JP2003511127A (en) * 1999-10-08 2003-03-25 ザ、プロクター、エンド、ギャンブル、カンパニー Semi-closed applicator for dispersing substance on target surface
JP2017160317A (en) * 2016-03-09 2017-09-14 三井化学産資株式会社 Rat-repelling urethane foam and method for producing the same

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