WO2019189692A1 - 有機無機複合粒子とその製造方法、および化粧料 - Google Patents
有機無機複合粒子とその製造方法、および化粧料 Download PDFInfo
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- WO2019189692A1 WO2019189692A1 PCT/JP2019/013871 JP2019013871W WO2019189692A1 WO 2019189692 A1 WO2019189692 A1 WO 2019189692A1 JP 2019013871 W JP2019013871 W JP 2019013871W WO 2019189692 A1 WO2019189692 A1 WO 2019189692A1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0241—Containing particulates characterized by their shape and/or structure
- A61K8/025—Explicitly spheroidal or spherical shape
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- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/0241—Containing particulates characterized by their shape and/or structure
- A61K8/0279—Porous; Hollow
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- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
- A61K8/25—Silicon; Compounds thereof
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- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
- A61K8/73—Polysaccharides
- A61K8/731—Cellulose; Quaternized cellulose derivatives
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
- A61Q1/12—Face or body powders for grooming, adorning or absorbing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61Q19/00—Preparations for care of the skin
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- C08J3/00—Processes of treating or compounding macromolecular substances
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- C08K7/00—Use of ingredients characterised by shape
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- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
- C08K7/26—Silicon- containing compounds
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/02—Cellulose; Modified cellulose
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0081—Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3072—Treatment with macro-molecular organic compounds
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/41—Particular ingredients further characterized by their size
- A61K2800/412—Microsized, i.e. having sizes between 0.1 and 100 microns
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- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
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- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
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- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
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- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/16—Biodegradable polymers
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- C08J2301/00—Characterised by the use of cellulose, modified cellulose or cellulose derivatives
- C08J2301/02—Cellulose; Modified cellulose
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- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/16—Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable
Definitions
- the present invention relates to spherical organic-inorganic composite particles having good biodegradability, and a cosmetic containing organic-inorganic composite particles.
- plastics are used in various industries to support modern life. Many of the synthetic polymers have been developed for long-term stability and are difficult to decompose in the natural environment. This has caused various environmental problems. For example, plastic products that have spilled into the water environment have accumulated for a long period of time, causing the problem of serious damage to the marine and lake ecosystems. In recent years, a fine plastic having a length of 5 mm or less to a nano level, called a micro plastic, has become a big problem. Examples of micro plastics include small consumer products such as cosmetics, small lumps of plastic resin before processing, and products that have become finer as large products float in the sea.
- plastic particles for example, polyethylene particles
- plastic particles have a low true specific gravity and are difficult to remove at sewage treatment plants, and flow into rivers, oceans, ponds and marshes.
- plastic particles are easy to adsorb chemical substances such as insecticides. These accumulate in fish and shellfish and are concentrated, which may affect the human body. This is pointed out in the United Nations Environment Program, etc., and various countries and various industry groups are considering regulations.
- biodegradable plastics that are decomposed into water and carbon dioxide by microorganisms in the natural environment and incorporated into the natural carbon cycle is being actively promoted all over the world.
- a cleaning agent containing fibrous biodegradable plastic particles having a particle diameter of 425 ⁇ m or more as an abrasive is known (see Patent Document 1).
- polylactic acid having a size of 1 to 44 ⁇ m suitable for use in cosmetic compositions is known (see Patent Document 2).
- polylactic acid resin fine particles having a number average particle diameter of less than 1 ⁇ m are known as fine biodegradable particles (see Patent Document 3).
- an object of the present invention is to provide organic-inorganic composite particles having a low average risk of causing environmental problems, a good fluidity, a high sphericity, and an average particle size of 0.5 to 25 ⁇ m. is there.
- Such organic-inorganic composite particles are suitable for blending into cosmetics, and can be used with peace of mind in the same applications as plastic beads.
- the organic-inorganic composite particles of the present invention are spherical particles containing 1.0 to 83.0% by weight of a silica component and 17.0 to 99.0% by weight of a biodegradable plastic.
- the average particle diameter d 1 is 0.5 to 25 ⁇ m, the true density is 1.03 to 2.00 g / cm 3 , and the sphericity is 0.80 or more.
- the contact angle of the organic-inorganic composite particles with respect to water was set to 90 ° or less.
- the elastic modulus of the organic-inorganic composite particles was set to 2 to 30 GPa.
- the ratio (d 3 / d 1 ) of the average particle diameter d 3 after dispersion and the average particle diameter d 1 before dispersion is determined. 0.95 to 1.05.
- the method for producing organic-inorganic composite particles according to the present invention includes an emulsification step of preparing an emulsion containing emulsion droplets by adding a surfactant and a non-aqueous solvent to a dispersion containing a silica component and a biodegradable plastic. And a dehydration step of dehydrating the emulsified droplets, and a step of solid-liquid separation of the non-aqueous solvent dispersion obtained in the dehydration step to obtain organic-inorganic composite particles as a solid.
- the cosmetic according to the present invention contains any of the organic-inorganic composite particles described above.
- the organic-inorganic composite particles according to the present invention do not float in water even if they flow into the environment, are difficult to adsorb non-water-soluble harmful chemical substances, and have better biodegradability. There are few concerns that cause it.
- the organic-inorganic composite particles according to the present invention contain 1.0 to 83.0% by weight of the silica component and 17.0 to 99.0% by weight of the biodegradable plastic.
- the average particle diameter d 1 is 0.5 to 25 ⁇ m, the true density is 1.03 to 2.00 g / cm 3 , and the sphericity is 0.80 or more.
- the silica component When the silica component is less than 1%, the effect of the silica component as a binder is low, and the number of contacts between fine biodegradable plastics increases, making it difficult to re-separate. On the other hand, when the biodegradable plastic is less than 17%, the soft feeling and moist feeling peculiar to plastic beads cannot be obtained. Further, 1 to 79% by weight of the silica component and 21 to 99% by weight of the biodegradable plastic are preferable. In particular, the silica component is preferably 5 to 70% by weight, and the biodegradable plastic is preferably 30 to 95% by weight.
- the true density of the organic-inorganic composite particles is less than 1.03 g / cm 3 , the biodegradation rate is delayed because the organic inorganic composite particles float on the water when they flow into the aqueous environment.
- particles having a true density exceeding 2.00 g / cm 3 have a low content of biodegradable plastic, and it is difficult to obtain touch characteristics like those of plastic particles.
- the true density is particularly preferably in the range of 1.10 to 1.90 g / cm 3 .
- the sphericity of the organic / inorganic composite particles is less than 0.80, the durability of the rolling feeling when applied on the skin is remarkably reduced.
- the sphericity is particularly preferably 0.90 or more.
- the sphericity can be obtained by an image analysis method from a photograph of a scanning electron microscope.
- the average particle diameter d 1 of the organic-inorganic composite particles is less than 0.5 [mu] m, rolling sensation, persistent feeling rolling, cosmetic feel characteristics such as uniform extended spreading resistance decreases significantly. On the other hand, when it exceeds 25 ⁇ m, when the particle powder is touched, it feels rough, and soft feeling and moist feeling are reduced.
- the average particle size is more preferably 2 to 10 ⁇ m. The average particle diameter is determined by a laser diffraction method.
- the organic / inorganic composite particles preferably have a contact angle with water of 90 ° or less.
- Organic-inorganic composite particles having a contact angle with water exceeding 90 ° tend to float on water when flowing into an aqueous environment, and the biodegradation rate may be delayed.
- the contact angle depends on the properties of the biodegradable plastic that is a constituent component. When the biodegradable plastic is hydrophobic, the contact angle often exceeds 90 °. In this case, the contact angle can be made 90 ° or less by adding a surfactant or the like to the organic-inorganic composite particles.
- Hydrophilic organic-inorganic composite particles having a contact angle of 90 ° or less are not only difficult to delay biodegradation but also difficult to adsorb water-insoluble harmful chemical substances such as polychlorinated biphenyl compounds and insecticides. Furthermore, the contact angle is preferably 80 ° or less, and particularly preferably 70 ° or less.
- the elastic modulus of the organic / inorganic composite particles is preferably 2 to 30 GPa.
- the elastic modulus is less than 2, the strength of a compression molded product such as a powder foundation is lowered, so that the blending amount of particles may be limited.
- the elastic modulus exceeds 30 GPa, distortion due to stress hardly occurs, and soft feeling and moist feeling like plastic beads cannot be imparted.
- the elastic modulus is particularly preferably in the range of 3 to 20 GPa.
- the elastic modulus is obtained by a micro compression test method.
- a dispersion liquid in which organic-inorganic composite particles are dispersed in distilled water was dispersed for 60 minutes using an ultrasonic disperser.
- the ratio (d 3 / d 1 ) between the average particle diameter d 3 after the dispersion test and the average particle diameter d 1 before the test is preferably within ⁇ 0.05, that is, 0.95 to 1.05.
- the ratio (d 3 / d 1 ) is less than 0.95, the strength of the particles is low, and the particles are collapsed by mechanical addition in the production process of cosmetics and the like, and the desired feeling improving effect May not be obtained. That this ratio is greater than 1.05 indicates that the biodegradable plastic swells in water. Therefore, it is easy to thicken after manufacturing cosmetics and the like, and quality stability cannot be guaranteed. In addition, the feel characteristics may change.
- the ratio (d 3 / d 1 ) is particularly preferably 0.97 to 1.03.
- organic / inorganic composite particles particles having a hollow structure in which cavities are formed inside the outer shell can be applied. Since hollow particles are lighter than solid particles having the same diameter, the number of hollow particles is larger than the number of particles in the case of solid particles when the component amount (% by weight) is the same.
- the ratio of the outer shell thickness T to the outer diameter OD of the organic-inorganic composite particles (T / OD) is preferably in the range of 0.02 to 0.45.
- the thickness ratio (T / OD) of the outer shell exceeds 0.45, it becomes substantially equivalent to particles having no hollow structure.
- the thickness ratio of the outer shell is less than 0.02, the particles are likely to collapse.
- the thickness ratio (T / OD) of the outer shell is particularly preferably in the range of 0.04 to 0.30.
- the outer shell may be porous through which nitrogen gas passes or non-porous through which nitrogen gas does not pass.
- the specific surface area per unit volume determined by the BET method is preferably 5 to less than 60 m 2 / cm 3 .
- the specific surface area of the organic-inorganic composite particles is less than 5 m 2 / cm 3 , biodegradability may be inferior. If the specific surface area is 60 m 2 / cm 3 or more, the definition of the nanomaterial is met, and there is a case where the specific surface area cannot be used with peace of mind in the same application as the conventional plastic beads.
- the specific surface area is particularly preferably 10 to less than 60 m 2 / cm 3 .
- silica component and the biodegradable plastic contained in the organic-inorganic composite particles of the present invention will be described in detail.
- silica component examples include silicic acid binders and silica particles.
- silicic acid binder an alkali metal silicate or a silicate aqueous solution such as an organic base silicate treated with a cation exchange resin and dealkalized (removal of Na ions, etc.) can be used.
- the silicate include alkali metal silicates such as sodium silicate (water glass) and potassium silicate, and silicates of organic bases such as quaternary ammonium silicate.
- the silica particles represent inorganic oxide particles containing silica, and examples thereof include not only silica but also composite oxides such as silica-alumina, silica-zirconia, silica-titania, silica-ceria. It is not necessary to change the production conditions of the organic-inorganic composite particles depending on the difference in the composition of the silica particles.
- Amorphous silica is suitable when blended in cosmetics.
- the average particle size d 2 of the silica particles 5 nm ⁇ 1 [mu] m is preferred.
- the average particle diameter exceeds 1 ⁇ m, the effect as a binder for the biodegradable particles decreases.
- the dissolution rate of silica in an underwater environment may decrease, and as a result, good biodegradability may be impaired.
- the average particle diameter is less than 5 nm, the stability as particles is low, which is not preferable from an industrial aspect.
- a range of 10 nm to 0.5 ⁇ m is particularly desirable.
- the organic / inorganic composite particles may contain inorganic oxide particles containing at least one of titanium oxide, iron oxide, zinc oxide, and cerium oxide as long as they are 20% by weight or less. With this amount, the inorganic oxide particles can be uniformly contained inside the organic-inorganic composite particles.
- iron oxide ferric oxide, ⁇ -iron oxyhydroxide, and triiron tetroxide are preferable.
- the average particle diameter of the inorganic oxide particles is at the same level as the silica particles. That is, a range of 5 nm to 1 ⁇ m is suitable.
- silica component generated from plant-derived raw materials from the viewpoint of realizing a sustainable society. Overseas, such as Europe and the United States, there is a growing need for natural and organic cosmetics from the viewpoint of harmony with the environment and safety. In ISO16128-1 (Guidelines on technical definitions and criteria for natural And organic cosmetic ingredients and products Part1: Definitions for ingredients), the raw materials are defined. Silica sand is frequently used as a silica source. Silica derived from silica sand is a classification of mineral-derived raw materials, but if it is a plant-derived silica component, it can be classified as a natural raw material and the natural index can be increased, so that the needs can be met.
- Plant-derived silica components are abundant in gramineous plants and can be extracted from rice husks and their ears. For example, it is known that high-purity silica can be obtained by a firing method disclosed in JP-A-7-196312, a pressurized hot water method disclosed in JP-A-2002-265257, or the like. The plant-derived silica component thus obtained is dissolved in sodium hydroxide to prepare sodium silicate, and then silica particles can be prepared according to a conventional method.
- biodegradable plastic particles having an average particle diameter d 4 of 1 nm to 1 ⁇ m are preferable.
- Organic-inorganic composite particles obtained from such fine particles having an average particle diameter exhibit good biodegradability.
- a range of 0.1 to 0.5 ⁇ m is particularly preferable.
- cellulose nanofibers with a thickness of 1 to 500 nm and a length of 1 ⁇ m or more as measured by electron micrographs, and cellulose nanocrystals with a thickness of 10 to 50 nm and a length of 100 to 500 nm are also biodegradable plastics. Is preferred.
- crystalline cellulose having glucose molecules as structural units is preferable.
- crystalline cellulose which is an I-type crystal form having glucose molecules as structural units is preferred.
- Cellulose subjected to intentional chemical modification that is not a crystal form of type I may not be classified as a natural raw material based on the above-mentioned definition of ISO16128-1.
- the crystal form of cellulose can be identified by infrared spectroscopy, and strong absorption is observed at 3365 to 3370 cm ⁇ 1 .
- the solid 13C NMR method can also be identified from the difference in chemical shift and the diffraction angle by the X-ray diffraction method.
- the crystal form may be either I ⁇ or I ⁇ or a mixture.
- Biodegradable plastic is biomass plastic, which is a renewable organic resource.
- Polylactic acid, polycaprolactone, polybutylene succinate, polyethylene succinate produced by chemical synthesis are desirable.
- Nate polyvinyl alcohol, polyaspartic acid, pullulan produced by microorganisms, polyglutamic acid, polyhydroxyalkanoic acid, starch derived from plants and animals, cellulose, amylose, amylopectin, chitin, chitosan, porphyran.
- Plant-derived cellulose is particularly preferable from the viewpoints of quality, price, distribution amount, and safety.
- a mixed liquid in which a silica component and a biodegradable plastic are dispersed is prepared.
- a surfactant and a non-aqueous solvent are added to this mixed solution to form emulsified droplets (emulsification step).
- the emulsified droplets are dehydrated (dehydration step).
- the obtained dispersion is subjected to solid-liquid separation, and the organic-inorganic composite particles are taken out as a solid (solid-liquid separation step). This solid is dried and crushed (drying step).
- a mixed liquid in which a silica component and a biodegradable plastic are dispersed is prepared. You may prepare by mixing the dispersion liquid of a silica component, and the dispersion liquid of a biodegradable plastics.
- the solid content concentration of the mixed solution is adjusted to be in the range of 0.01 to 50%.
- the solvent is preferably water. When the solid concentration exceeds 50%, the viscosity of the aqueous dispersion usually increases, and the uniformity of the emulsified droplets may be impaired. If the solid content concentration is less than 0.01%, there is no particular advantage and the economy is poor.
- non-aqueous solvent and surfactant to this mixture.
- the non-aqueous solvent necessary for emulsification is not particularly limited as long as it is incompatible with water, and a general hydrocarbon solvent can be used.
- the surfactant is not particularly limited as long as it can form water-in-oil type emulsion droplets, but a surfactant having an HLB value in the range of 1 to 10 is suitable depending on the polarity of the non-aqueous solvent. .
- the HLB value of the surfactant is particularly preferably in the range of 1-5. A combination of surfactants having different HLB values may be used.
- this solution is emulsified with an emulsifier.
- an emulsion containing emulsion droplets of 0.5 to 500 ⁇ m is prepared.
- the emulsifying device is a conventional high-speed shearing device, a high-pressure emulsifying device that can obtain finer emulsified droplets, a membrane emulsifying device that can obtain more uniform emulsified droplets, a microchannel emulsifying device, and the like. It can be used according to the purpose.
- the emulsion obtained in the emulsification step is dehydrated.
- water is evaporated by heating under normal pressure or reduced pressure.
- the emulsified droplets are dehydrated to obtain a non-aqueous solvent dispersion containing organic-inorganic composite particles having a particle size of 0.5 to 25 ⁇ m.
- the separable flask equipped with a cooling tube is heated, and dehydration is performed while collecting the non-aqueous solvent.
- dehydration is performed while recovering the non-aqueous solvent by heating under reduced pressure using a rotary evaporator or an evaporator. It is preferable to perform dehydration to the extent that it can be taken out as a solid from the non-aqueous solvent dispersion in the solid-liquid separation step described below. If dehydration is insufficient, it is necessary to be careful because the form as spherical particles cannot be maintained in the solid-liquid separation process.
- Solid-liquid separation process the solid content is separated from the non-aqueous solvent dispersion obtained in the dehydration step by a conventionally known method such as filtration or centrifugation. Thereby, the cake-like substance of organic-inorganic composite particles is obtained.
- the drying step the non-aqueous solvent is evaporated from the cake-like substance obtained in the solid-liquid separation step by heating under normal pressure or reduced pressure. Thereby, a dry powder of organic-inorganic composite particles having an average particle size of 0.5 to 25 ⁇ m is obtained.
- a freezing step may be provided between the emulsification step and the dehydration step.
- a frozen emulsion in which water in the droplets is frozen can be obtained.
- the frozen emulsion is dehydrated in a dehydration step.
- the freezing temperature is ⁇ 50 ° C. to ⁇ 10 ° C.
- porous organic-inorganic composite particles can be prepared.
- the silica component and the biodegradable plastic component in the droplet are expelled to the outer periphery of the droplet. Therefore, hollow-structure organic-inorganic composite particles having cavities inside the outer shell can be prepared.
- a specific temperature in the range of ⁇ 10 to 0 ° C. may be maintained, or may be varied within this range.
- the surfactant may be reduced by washing the cake-like substance of the organic-inorganic composite particles obtained in the solid-liquid separation step.
- the organic-inorganic composite particles according to the present invention are used in a solid preparation such as a foundation, there is no particular problem.
- the residual amount of the surfactant is preferably 500 ppm or less with respect to the organic-inorganic composite particles.
- washing with an organic solvent is preferable.
- organic-inorganic composite particles of the present invention are used in cosmetics, unlike conventional particles composed of an inorganic single component such as silica particles, not only the rolling feeling, the durability of the rolling feeling, and the uniform extension and spreadability, It is possible to obtain typical feel characteristics required for a cosmetic feel improving material such as soft feeling and moist feeling peculiar to plastic beads.
- Oils such as olive oil, rapeseed oil, jojoba oil, and beef tallow.
- Hydrocarbons such as paraffin, squalane, synthetic and plant squalane, ⁇ -olefin oligomer, microcrystalline wax, pentane, hexane and the like.
- Fatty acids such as stearic acid, myristic acid and oleic acid.
- Alcohols such as isostearyl alcohol, octyldodecanol, lauryl alcohol, ethanol, isopropanol, butyl alcohol, myristyl alcohol, cetanol, stearyl alcohol, and behenyl alcohol; Esters such as alkyl glyceryl ethers, isopropyl myristate, isopropyl palmitate, ethyl stearate, ethyl oleate, cetyl laurate, decyl oleate.
- Polyhydric alcohols such as ethylene glycol, triethylene glycol, polyethylene glycol and diglycerin.
- Sugars such as sorbitol, glucose and sucrose.
- Silicone oils such as methylpolysiloxane, methylhydrogenpolysiloxane, methylphenyl silicone oil, various modified silicone oils, and cyclic dimethylsilicone oil. Silicone gel crosslinked with organic compounds such as silicone. Nonionic, cationic, anionic, or amphoteric surfactants. Fluorine oil such as perfluoropolyether. Polymers such as gum arabic, carrageenan, agar, xanthan gum, gelatin, alginic acid, guar gum, albumin, pullulan, carboxyvinyl polymer, cellulose and its derivatives, polyacrylic amide, sodium polyacrylate, polyvinyl alcohol and the like.
- UV protection agents such as cinnamic acid type such as octyl paramethoxycinnamate, salicylic acid type, benzoic acid ester type, urocanic acid type and benzophenone type.
- Solvents such as butyl acetate, acetone, and toluene.
- the surface of the inorganic compound such as titanium oxide or zinc oxide may be subjected to silicone treatment, fluorine treatment, metal soap treatment, or the like in advance.
- resin particles such as polymethyl acrylate, nylon, silicone resin, silicone rubber, polyethylene, polyester, and polyurethane may be included.
- arbutin as an active ingredient having a whitening effect, arbutin, kojic acid, vitamin C, sodium ascorbate, magnesium ascorbate phosphate, ascorbyl dipartate, ascorbyl glucoside, other ascorbic acid derivatives, placenta extract, sulfur, Plant extracts such as oil-soluble licorice extract and mulberry extract, linoleic acid, linolenic acid, lactic acid, tranexamic acid and the like may be included.
- Anti-aging effects such as vitamin C, carotenoids, flavonoids, tannins, caffeine derivatives, lignans, saponins, retinoic acid and retinoic acid structural analogs, N-acetylglucosamine, ⁇ -hydroxy acids, etc.
- polyhydric alcohols such as 1,3-butylene glycol
- mixed isomerized sugars sugars such as trehalose, pullulan, sodium hyaluronate, collagen, elastin, chitin / chitosan, chondroitin sulfate sodium Biopolymers such as amino acids, betaines, ceramides, sphingolipids, cholesterol and derivative
- Cosmetics can be produced by a conventionally known general method.
- Cosmetics are used in various forms such as powder, cake, pencil, stick, cream, gel, mousse, and liquid. Specific examples include the following products.
- Cosmetics for cleaning such as soap, cleansing foam, makeup remover cream.
- Skin care cosmetics for moisturizing and preventing rough skin, acne, keratin care, massage, wrinkle / sagging, dullness / bearing, UV care, whitening, antioxidant care.
- Base makeup cosmetics such as powder foundation, liquid foundation, cream foundation, mousse foundation, pressed powder, makeup base.
- Point makeup cosmetics such as eye shadow, eyebrow, eyeliner, mascara and lipstick.
- Body care cosmetics such as body powder for washing, sun protection, hand roughening, slimming, blood circulation improvement, itching control, body odor prevention, antiperspirant, hair care, repellant, body powder, etc.
- Fragrance cosmetics such as perfume, eau de perfume, eau de toilette, eau de cologne, shower colon, etc., perfume, body lotion, bath oil.
- Oral care products such as toothpaste and mouthwash.
- Example 1 50 g of commercially available silica sol (manufactured by JGC Catalysts & Chemicals Co., Ltd .: SS-300, average particle size 300 nm, silica concentration 20% by mass) is concentrated by a rotary evaporator to obtain 25 g of silica sol having a silica concentration of 40% by mass.
- a cation resin manufactured by Mitsubishi Kasei Co., Ltd., SK-1B is added at once to the silica sol to adjust the pH to 2.5, and then the cation exchange resin is separated.
- a slurry b is prepared by adding 10 g of type I cellulose particles (Ceorus (registered trademark) RC-N30 manufactured by Asahi Kasei Corporation) and 30 g of pure water to the slurry a.
- the obtained slurry b was added to a solution obtained by mixing 1300 g of heptane (manufactured by Kanto Chemical Co., Inc.) and 9.75 g of a surfactant AO-10V (manufactured by Kao Corp.), and an emulsifying disperser (TK Robot manufactured by PRIMIX Corporation). Emulsification at 10000 rpm for 10 minutes.
- the obtained emulsified liquid was heated at 60 ° C. for 16 hours, dehydrated from the emulsified droplets, and then quantitative filter paper (No. 2 manufactured by Advantech Toyo Co., Ltd.) using a Buchner funnel (3.2 L manufactured by Sekiya Rika Glass Instruments Co., Ltd.). Filter with.
- the surfactant is removed by repeated washing with heptane to obtain a cake-like substance.
- the cake-like material is dried at 120 ° C. for 12 hours.
- the dried powder was pulverized with a juicer mixer (manufactured by Hitachi, Ltd.) for 10 seconds and sieved with a 250 mesh sieve (standard sieve for JIS test) to obtain a powder of organic-inorganic composite particles.
- Table 1 shows the conditions for preparing the organic-inorganic composite particles for each example. Further, the physical properties of the powder of the organic / inorganic composite particles were measured by the following method. The results are shown in Table 2.
- Average particle diameter of each particle (d 1 , d 2 , d 4 )
- the particle size distribution of the organic / inorganic composite particles, silica particles, and biodegradable plastic particles was measured using a laser diffraction method, and the median diameter was determined from the particle size distribution to obtain the average particle size.
- an average particle diameter d 4 of the average particle diameter d 1 an average particle size d 2 and biodegradable plastic particles of the silica particles of the organic-inorganic composite particles.
- a laser diffraction / scattering particle size distribution measuring apparatus LA-950v2 manufactured by Horiba, Ltd.
- the average particle diameter d 4 of fibrous biodegradable plastic particles represented by cellulose nanofibers, cellulose nanocrystals, etc. the average in terms of equivalent spheres using the following formula from the specific surface area and specific gravity of the particles: The particle size was calculated.
- Average particle size 6000 ⁇ (“true density” ⁇ “specific surface area”)
- Average particle size ratio (d 3 / d 1 )
- the dispersion condition of the device is set to “ultrasonic 60 minutes” and dispersed, and then the particle size distribution is determined. taking measurement.
- the average particle diameter d 3 which is represented by the median diameter of particle size distribution after dispersion seek. From this, the average particle size ratio (d 3 / d 1 ) before and after ultrasonic dispersion is determined.
- Pore volume and pore diameter of organic / inorganic composite particles 10 g of powder of organic / inorganic composite particles was placed in a crucible, dried at 105 ° C. for 1 hour, then cooled to room temperature in a desiccator, and an automatic porosimeter (counterchrome ⁇ The pore size distribution was measured by mercury porosimetry using Instruments (PoreMasterPM33GT manufactured by Instruments). Specifically, mercury is injected at a pressure of 1.5 kPa to 231 MPa, and the pore size distribution is determined from the relationship between the pressure and the pore size.
- Elastic modulus One particle having an average particle size in the range of ⁇ 0.5 ⁇ m was selected from the organic-inorganic composite particle powder and used as a sample. Using a micro compression tester (manufactured by Shimadzu Corporation, MCTM-200), a load was applied to this sample at a constant load speed, and the compression modulus was measured.
- Example 2 Instead of the type I cellulose particles in the polymer dispersion used in Example 1, BiNFi-s WMa-10002 manufactured by Sugino Machine Co. was used. Other than this, organic-inorganic composite particles were prepared in the same manner as in Example 1, and the physical properties were measured in the same manner as in Example 1.
- Example 3 Instead of the type I cellulose particles in the polymer dispersion used in Example 1, RheoCrysta C-2SP manufactured by Daiichi Kogyo Seiyaku Co., Ltd. was used. Other than this, organic-inorganic composite particles were prepared in the same manner as in Example 1, and the physical properties were measured in the same manner as in Example 1.
- Example 4 The mixing amount of type I cellulose particles (Ceolas (registered trademark) RC-N30 manufactured by Asahi Kasei Co., Ltd.) in the polymer dispersion was changed to 4.3 g. Other than this, organic-inorganic composite particles were prepared in the same manner as in Example 1, and the physical properties were measured in the same manner as in Example 1.
- Example 5 The mixing amount of type I cellulose particles (Ceolas (registered trademark) RC-N30 manufactured by Asahi Kasei Co., Ltd.) in the polymer dispersion was changed to 23.3 g. Other than this, organic-inorganic composite particles were prepared in the same manner as in Example 1, and the physical properties were measured in the same manner as in Example 1.
- Example 6 The emulsified liquid is allowed to stand in a thermostatic bath at ⁇ 5 ° C. for 16 hours to freeze the emulsified droplets.
- the emulsified liquid is allowed to stand at room temperature and then used with a Buchner funnel (3.2 L manufactured by Sekiya Rika Glass Instruments Co., Ltd.). And filtered with a quantitative filter paper (No. 2 manufactured by Advantech Toyo Co., Ltd.).
- a quantitative filter paper No. 2 manufactured by Advantech Toyo Co., Ltd.
- organic-inorganic composite particles were prepared in the same manner as in Example 1, and the physical properties were measured in the same manner as in Example 1.
- Example 7 The emulsified liquid was allowed to stand in a thermostatic bath at ⁇ 25 ° C. for 16 hours to freeze the emulsified droplets.
- organic-inorganic composite particles were prepared in the same manner as in Example 6, and the physical properties were measured in the same manner as in Example 1.
- Example 8 Implemented except that 62.5 g of a commercial product (SS-160, JGC Catalysts Chemical Co., Ltd., average particle size 160 nm, solid content concentration 16% by mass) was used as the silica sol and was concentrated with an evaporator to obtain a silica sol with a silica concentration of 40% by weight.
- Organic-inorganic composite particles were prepared in the same manner as in Example 1, and the physical properties were measured in the same manner as in Example 1.
- Example 9 Organic-inorganic composite particles as in Example 1 except that 50 g of a commercially available product (SI-550 manufactured by JGC Catalysts & Chemicals Co., Ltd., average particle size 5 nm, solid content concentration 20% by mass) was used as silica sol, and no concentration was performed using an evaporator. And the physical properties were measured in the same manner as in Example 1.
- a commercially available product SI-550 manufactured by JGC Catalysts & Chemicals Co., Ltd., average particle size 5 nm, solid content concentration 20% by mass
- Example 10 As a slurry a, 200 g of a silicic acid solution (solid content concentration 5%) is used, and a polymer dispersion obtained by mixing 10 g of type I cellulose particles (Ceorus (registered trademark) RC-N30 manufactured by Asahi Kasei Co., Ltd.) and 30 g of pure water is used. This was added to prepare slurry b. Thereafter, organic-inorganic composite particles were prepared in the same manner as in Example 6, and the physical properties were measured in the same manner as in Example 1.
- a silicic acid solution solid content concentration 5%
- Example 11 Organic-inorganic composite particles were prepared in the same manner as in Example 1 except that emulsification was carried out at 5000 rpm for 10 minutes using an emulsifying disperser (TK Robotics manufactured by Primics). Physical properties were measured.
- Example 2 Organic-inorganic composite particles were prepared in the same manner as in Example 1 except that the emulsion was heated at 95 ° C. for 4 hours, and the physical properties were measured in the same manner as in Example 1. By rapidly heating at a high temperature, the emulsified droplets collapsed prior to dehydration, so particles with high sphericity could not be obtained.
- Evaluation point criteria (a) 5 points: Excellent. 4 points: Excellent. 3 points: Normal. 2 points: Inferior. 1 point: Very inferior. Evaluation criteria (b) ⁇ : Total score is 80 or more ⁇ : Total score is 60 or more and less than 80 ⁇ : Total score is 40 or more and less than 60 ⁇ : Total score is 20 or more and less than 40 ⁇ : Total score is less than 20
- a powder foundation was prepared using the powder of the organic-inorganic composite particles so as to have a blending ratio (% by weight) shown in Table 4. That is, the powder (component (1)) and components (2) to (9) of Example 1 were placed in a mixer and stirred to mix uniformly. Next, the cosmetic ingredients (10) to (12) were put into this mixer and stirred, and further mixed uniformly. Next, after crushing the obtained cake-like substance, about 12 g was taken out from it, put into a square metal pan of 46 mm ⁇ 54 mm ⁇ 4 mm, and press molded. The powder foundation thus obtained was subjected to a sensory test by 20 professional panelists.
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Abstract
Description
シリカ成分を例示すると、珪酸バインダーやシリカ粒子が挙げられる。珪酸バインダーとしては、アルカリ金属珪酸塩、有機塩基の珪酸塩等の珪酸塩水溶液を陽イオン交換樹脂で処理して脱アルカリ(Naイオンの除去等)したものを使用できる。珪酸塩としては、珪酸ナトリウム(水ガラス)、珪酸カリウム等のアルカリ金属珪酸塩、第4級アンモニウムシリケート等の有機塩基の珪酸塩などが挙げられる。
生分解性プラスチックとしては、平均粒子径d4が1nm~1μmの生分解性プラスチック粒子が好ましい。このような微細な平均粒子径の粒子により得られる有機無機複合粒子は、良好な生分解性を発揮する。0.1~0.5μmの範囲が特に好ましい。その他、電子顕微鏡写真で計測される太さが1~500nm、長さが1μm以上のセルロースナノファイバーや、太さが10~50nm、長さが100~500nmのセルロースナノクリスタルも生分解性プラスチックとして好適である。
次に、有機無機複合粒子の製造方法について説明する。はじめに、シリカ成分と生分解性プラスチックが分散された混合液を用意する。この混合液に界面活性剤と非水系溶媒を加えて、乳化液滴を形成する(乳化工程)。そして、この乳化液滴を脱水処理する(脱水工程)。得られた分散体を固液分離して有機無機複合粒子を固形物として取り出す(固液分離工程)。この固形物を乾燥して解砕する(乾燥工程)。
シリカ成分と生分解性プラスチックが分散された混合液を用意する。シリカ成分の分散液と生分解性プラスチックの分散液とを混合して調製してもよい。この混合液の固形分濃度が、0.01~50%の範囲になるように調整する。なお、溶媒は水が好ましい。固形分濃度が50%を超えると、通常、水分散体の粘度が高くなり、乳化液滴の均一性が損なわれることがある。固形分濃度が0.01%未満では特に利点がなく、経済性が悪い。
次に、乳化工程で得られた乳化液を脱水処理する。例えば、常圧、または減圧下での加熱により、水を蒸発させる。これにより、乳化液滴が脱水されて粒子径0.5~25μmの有機無機複合粒子を含む非水系溶媒分散体が得られる。
固液分離工程では、従来公知の濾過、遠心分離などの方法で、脱水工程で得られた非水系溶媒分散体から固形分を分離する。これにより、有機無機複合粒子のケーキ状物質が得られる。
乾燥工程では、常圧または減圧下での加熱により、固液分離工程で得られたケーキ状物質から非水系溶媒を蒸発させる。これにより、平均粒子径0.5~25μmの有機無機複合粒子の乾燥粉体が得られる。
以下に、有機無機複合粒子と各種の化粧料成分とを配合して得られる化粧料について具体的に説明する。
市販のシリカゾル(日揮触媒化成社製:SS-300、平均粒子径300nm、シリカ濃度20質量%)50gをロータリーエバポレーターで濃縮し、シリカ濃度40質量%のシリカゾル25gとする。このシリカゾルに、陽イオン樹脂(三菱化成社製、SK-1B)を一気に加えてpHを2.5とした後、陽イオン交換樹脂を分離する。これにより、脱アルカリ処理(Naイオンの除去等)がなされ、シリカ粒子濃度39.3質量%のスラリーaが得られる。スラリーaに、I型セルロース粒子(旭化成社製セオラス(登録商標)RC-N30)10gと純水30gを均一に分散した高分子分散液を添加し、スラリーbを調製する。
レーザー回折法を用いて、有機無機複合粒子、シリカ粒子、生分解性プラスチック粒子の粒度分布を測定し、この粒度分布からメジアン径を求め、平均粒子径とした。このようにして、有機無機複合粒子の平均粒子径d1、シリカ粒子の平均粒子径d2および生分解性プラスチック粒子の平均粒子径d4を求めた。レーザー回折法による粒度分布の測定は、レーザー回折/散乱式粒子径分布測定装置LA-950v2(株式会社堀場製作所製)を用いた。但し、セルロースナノファイバーやセルロースナノクリスタル等に代表される繊維状生分解性プラスチック粒子の平均粒子径d4については、その粒子の比表面積と比重から、以下の式を用いて等価球換算の平均粒子径を算出した。
レーザー回折/散乱式粒子径分布測定装置LA-950v2にて有機無機複合粒子の平均粒子径を測定する際、該装置の分散条件を「超音波60分間」に設定し分散した後、粒度分布を測定する。分散後の粒度分布からメジアン径で表わされる平均粒子径d3を求める。これから超音波分散前後の平均粒子径比(d3/d1)を求める。
有機無機複合粒子を磁性ルツボ(B-2型)に約30mL採取し、105℃で2時間乾燥後、デシケーターに入れて室温まで冷却する。次に、サンプルを15mL採取し、全自動ピクノメーター(QUANTACHROME社製:Ultrapyc1200e)を用いて真密度を測定した。
走査型電子顕微鏡(日本電子社製JSM-7600F)により、倍率2万倍から25万倍で写真(SEM写真)を撮影する。この画像の250個の粒子について、画像解析装置(旭化成社製、IP-1000)を用いて、平均粒子径を測定し、粒子径分布に関する変動係数(CV値)を算出した。
透過型電子顕微鏡(日立製作所製、H-8000)により、倍率2000倍から25万倍の倍率で写真撮影して得られる写真投影図から、任意の50個の粒子を選び、それぞれその最大径DLと、これに直交する短径DSとの比(DS/DL)を測定し、それらの平均値を真球度とした。
有機無機複合粒子の粉体を磁性ルツボ(B-2型)に約30mL採取し、105℃の温度で2時間乾燥した後、デシケーターに入れて室温まで冷却する。次に、この試料を1g取り、全自動表面積測定装置(湯浅アイオニクス社製、マルチソーブ12型)を用いて、比表面積(m2/g)をBET法にて測定した。有機無機複合粒子に配合したシリカと生分解性プラスチックの組成比(配合重量比)から求められる比重(例えば、シリカが100%であれば2.2g/cm3、セルロースが100%であれば1.5g/cm3)でこれを換算し、単位体積当たりの比表面積を求めた。
有機無機複合粒子の粉体10gをルツボに取り、105℃で1時間乾燥した後、デシケーター中で室温まで冷却し、自動ポロシメーター(カウンタークローム・インスツルメンツ社製PoreMasterPM33GT)を使用して水銀圧入法により細孔径分布を測定した。詳しくは、水銀を1.5kPa~231MPaで圧入し、圧力と細孔径の関係から細孔径分布が求められる。この方法によれば、約7nmから約1000μmの細孔に水銀が圧入されるため、有機無機複合粒子の内部に存在する小径の細孔と、有機無機複合粒子の粒子同士の間隙の両方が細孔径分布に表れる。粒子同士の間隙は、概ね粒子の平均粒子径に対して1/5~1/2の大きさになる。粒子同士の間隙に依存する部分を除いて、細孔に依存する細孔径分布に基づき、細孔容積、平均細孔径を算出した。このとき、必要に応じてピーク分離ソフト(自動ポロシメーターに付属)が用いられる。
有機無機複合粒子の粉体0.2gを白金皿で精秤し、硫酸10mLと弗化水素酸10mLを加えて、砂浴上で硫酸の白煙が出るまで加熱する。冷却後、水約50mLを加えて加温溶解する。冷却後、水200mLに希釈しこれを試験溶液とする。この試験溶液について誘導結合プラズマ発光分光分析装置(島津製作所製、ICPS-8100、解析ソフトウェアICPS-8000)を使用し、有機無機複合粒子の組成を求める。
有機無機複合粒子1gを105℃で乾燥させた後、直径1cm、高さ5cmのセルに入れ、50kgfの荷重でプレスして成型物を得る。得られた成型物の表面に水を一滴たらして水に対する接触角を測定した。
有機無機複合粒子の粉体から、平均粒子径±0.5μmの範囲にある粒子1個を選び、試料とした。微小圧縮試験機(島津製作所製、MCTM-200)を用いて、この試料に一定の負荷速度で荷重を負荷し、圧縮弾性率を測定した。
実施例1で用いた高分子分散液内のI型セルロース粒子の代わりに、スギノマシン社製BiNFi-s WMa―10002を用いた。これ以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
実施例1で用いた高分子分散液内のI型セルロース粒子の代わりに、第一工業製薬社製レオクリスタC-2SPを用いた。これ以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
高分子分散液内のI型セルロース粒子(旭化成社製セオラス(登録商標)RC-N30)の混合量を、4.3gに変更した。これ以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
高分子分散液内のI型セルロース粒子(旭化成社製セオラス(登録商標)RC-N30)の混合量を、23.3gに変更した。これ以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
乳化液を-5℃の恒温槽中に16時間静置して乳化液滴を凍結させ、さらにその乳化液を常温で放置したのち、ブフナー漏斗(関谷理化硝子器械社製3.2L)を用いて定量濾紙(アドバンテック東洋社製No.2)で濾過した。これ以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
乳化液を-25℃の恒温槽中に16時間静置して乳化液滴を凍結させた。これ以外は実施例6と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
シリカゾルとして市販品(日揮触媒化成社製 SS-160、平均粒子径160nm、固形分濃度16質量%)62.5gを使用し、エバポレーターで濃縮してシリカ濃度40重量%のシリカゾルとした以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
シリカゾルとして市販品(日揮触媒化成社製 SI-550、平均粒子径5nm、固形分濃度20質量%)50gを使用し、エバポレーターによる濃縮を行わなかった以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
スラリーaとして珪酸液(固形分濃度5%)200gを使用し、これに、I型セルロース粒子(旭化成社製セオラス(登録商標)RC-N30)10gと純水30gを混合した高分子分散液を添加し、スラリーbを調製した。以降は実施例6と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
乳化分散機(プライミクス社製T.K.ロボミックス)を使用して5000rpmにて10分間乳化を行った以外は、実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
高分子分散液内のセルロース粒子(旭化成社製セオラス(登録商標)RC-N30)の混合量を、1.1gに変更した以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
乳化液を95℃で4時間加熱した以外は実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。高温で急激に加熱することにより、脱水より先に乳化液滴が崩壊したため、真球度の高い粒子が得られなかった。
乳化分散機(プライミクス社製T.K.ロボミックス)を使用して500rpmにて10分間乳化を行った以外は、実施例1と同様に有機無機複合粒子を調製し、実施例1と同様に物性を測定した。
次に、各実施例と比較例で得られた粉体を用いて、感触特性を評価した。各粉体について、20名の専門パネラーによる官能テストを行った。さらさら感、しっとり感、転がり感、均一な延び広がり性、肌への付着性、転がり感の持続性、およびソフト感の7つの評価項目に関して聞き取り調査を行い、以下の評価点基準(a)に基づき評価する。各人の評価点を合計し、以下の評価基準(b)に基づき有機無機複合粒子の感触に関する評価を行った。結果を表3に示す。その結果、各実施例の粉体は、化粧料の感触改良材として極めて優れているが、比較例の粉体は、感触改良材として適していないことが分かった。
評価点基準(a)
5点:非常に優れている。
4点:優れている。
3点:普通。
2点:劣る。
1点:非常に劣る。
評価基準(b)
◎:合計点が80点以上
○:合計点が60点以上80点未満
△:合計点が40点以上60点未満
▲:合計点が20点以上40点未満
×:合計点が20点未満
次に、有機無機複合粒子の粉体を用いて表4に示す配合比率(重量%)となるようにパウダーファンデーションを作製した。すなわち、実施例1の粉体(成分(1))と成分(2)~(9)をミキサーに入れて撹拌し、均一に混合した。次に、化粧料成分(10)~(12)をこのミキサーに入れて撹拌し、さらに均一に混合した。次いで、得られたケーキ状物質を解砕処理した後、その中から約12gを取り出し、46mm×54mm×4mmの角金皿に入れてプレス成型した。この様にして得られたパウダーファンデーションについて、20名の専門パネラーによる官能テストを行った。肌への塗布中の均一な延び、しっとり感、滑らかさ、および、肌に塗布後の化粧膜の均一性、しっとり感、やわらかさの6つの評価項目に関して聞き取り調査を行い、評価点基準(a)に基づき評価した。また、各人の評価点を合計し、評価基準(b)に基づきファンデーションの使用感を評価した。結果を表5に示す。ここでは、実施例1~3による化粧料A~Cを代表例として取り上げて評価した。実施例に基づく化粧料A~Cは、その使用感が、塗布中でも塗布後でも、非常に優れていることが分かった。しかし、比較例1~3の化粧料a~cは、その使用感がよくないことが分かった。
Claims (12)
- シリカ成分1.0~83.0重量%と生分解性プラスチック17.0~99.0重量%を含む球状の有機無機複合粒子であって、平均粒子径d1が0.5~25μm、真密度が1.03~2.00g/cm3、真球度が0.80以上である有機無機複合粒子。
- 水に対する接触角が90°以下であることを特徴とする請求項1に記載の有機無機複合粒子。
- 弾性率が2~30GPaであることを特徴とする請求項1または2に記載の有機無機複合粒子。
- 前記有機無機複合粒子の分散液を、超音波分散機を用いて60分間分散させたとき、分散後の平均粒子径d3と、分散前の平均粒子径d1の比(d3/d1)が、0.95~1.05の範囲にあることを特徴とする請求項1~3のいずれか一項に記載の有機無機複合粒子。
- 前記シリカ成分として、平均粒子径d2が5nm~1μmの範囲にあるシリカ粒子が含まれることを特徴とする請求項1~4のいずれか一項に記載の有機無機複合粒子。
- 前記生分解性プラスチックは、平均粒子径d4が1nm~1μmの粒子であることを特徴とする請求項1~5のいずれか一項に記載の有機無機複合粒子。
- 前記生分解性プラスチックが、グルコース分子を構成単位とした結晶性セルロースであることを特徴とする請求項1~6のいずれか一項に記載の有機無機複合粒子。
- 前記有機無機複合粒子が外殻の内部に空洞を有する中空粒子であることを特徴とする請求項1~7のいずれか一項に記載の有機無機複合粒子。
- 請求項1~8のいずれか一項に記載の有機無機複合粒子が配合された化粧料。
- シリカ成分と生分解性プラスチックが分散された分散液に、界面活性剤と非水系溶媒を加えて、乳化液滴を含む乳化液を調製する乳化工程と、
前記乳化液滴を脱水処理する脱水工程と、
前記脱水工程で得られた非水系溶媒分散体を固液分離して有機無機複合粒子を固形物として得る工程と、を含むことを特徴とする有機無機複合粒子の製造方法。 - 前記乳化工程と前記脱水工程の間に、前記乳化液滴を凍結する凍結工程を含むことを特徴とする請求項10に記載の有機無機複合粒子の製造方法。
- 前記乳化工程において、前記乳化液滴が-10~0℃で凍結されたことを特徴とする請求項11に記載の有機無機複合粒子の製造方法。
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WO2023189800A1 (ja) * | 2022-03-30 | 2023-10-05 | 日本ゼオン株式会社 | 中空粒子及びその製造方法 |
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