WO2021177141A1 - 樹脂ビーズ、樹脂ビーズの製造方法、及び樹脂ビーズを用いた製品 - Google Patents
樹脂ビーズ、樹脂ビーズの製造方法、及び樹脂ビーズを用いた製品 Download PDFInfo
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- WO2021177141A1 WO2021177141A1 PCT/JP2021/007183 JP2021007183W WO2021177141A1 WO 2021177141 A1 WO2021177141 A1 WO 2021177141A1 JP 2021007183 W JP2021007183 W JP 2021007183W WO 2021177141 A1 WO2021177141 A1 WO 2021177141A1
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- Prior art keywords
- resin beads
- resin
- cellulose
- suspension
- cellulose derivative
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- 238000010008 shearing Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 229940032094 squalane Drugs 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- VLPFTAMPNXLGLX-UHFFFAOYSA-N trioctanoin Chemical compound CCCCCCCC(=O)OCC(OC(=O)CCCCCCC)COC(=O)CCCCCCC VLPFTAMPNXLGLX-UHFFFAOYSA-N 0.000 description 1
- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- C08J3/16—Powdering or granulating by coagulating dispersions
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2301/08—Cellulose derivatives
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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Definitions
- the present invention relates to resin beads containing a cellulose derivative as a main component, a method for producing the resin beads, and products such as cosmetics obtained by using the resin beads.
- resin beads have been used in various fields such as matting agents, slipping agents, and blocking inhibitors because of their spherical properties. Further, various resin powders (resin particles) such as resin beads are used in order to improve properties such as extensibility of cosmetics for makeup.
- resin powders resin particles
- the constituent materials of resin beads to be blended in cosmetics are shifting from petroleum-derived synthetic materials to natural materials.
- Patent Document 1 powdered cellulose useful as a scrubbing agent has been proposed (Patent Document 1). Further, cellulose derivative fine particles (Patent Document 2) used for diagnostic agents and spherical cellulose powder (Patent Document 3) used for cosmetics have been proposed. Further, porous cellulose particles (Patent Documents 4 and 5) used as a packing material for chromatography, biodegradable cellulose acetate particles having high sphericity (Patent Document 6), and the like have been proposed.
- the powdered celluloses and the like proposed in Patent Documents 1, 2, 4, and 5 are not suitable for the particle size as an agent to be blended in cosmetics for makeup or skin care. Further, since the cellulose derivative fine particles proposed in Patent Document 2 need to use copper ammonia at the time of production, they are not necessarily suitable as a material for cosmetics for which heavy metals are desired to be reduced as much as possible. There wasn't.
- the spherical cellulose powders and the like proposed in Patent Documents 3 to 6 have low sphericity and the particle surface is not so smooth. For this reason, even if it is blended with cosmetics, it cannot be said that the spread on the skin is so good, and it is easy to feel roughness. Furthermore, light scattering is likely to occur due to the roughness of the particle surface and the non-solid structure, and the texture is likely to change significantly as the powder gets wet or is used in a solution.
- porous cellulose particles and the like proposed in Patent Documents 4 and 5 are porous, they easily adsorb water. For this reason, when blended in cosmetics, the cosmetics themselves tend to become unstable, so it cannot be said that they are necessarily suitable as materials for cosmetics.
- the cellulose acetate particles proposed in Patent Document 6 have a dry tactile sensation, when used as a tactile sensation improver, they are not necessarily suitable as materials exhibiting a "moist tactile sensation" required in the market. I could't say that.
- the cellulose acetate particles are easily hydrolyzed over time, and acetic acid generated by the hydrolysis gives off an offensive odor, so that it is not always suitable as a material for cosmetics.
- the present invention has been made in view of the problems of the prior art, and the subject thereof is various kinds of cosmetics and the like, which are less likely to generate odors and have excellent tactile sensation and spread on the skin. It is an object of the present invention to provide various products such as resin particles made of petroleum-derived synthetic materials, resin beads that can be substituted, and cosmetics using the same. Further, an object of the present invention is to replace resin particles made of a synthetic material derived from petroleum, which can provide various products such as cosmetics which are less likely to generate odor and have excellent tactile sensation and spread on the skin. It is an object of the present invention to provide a possible method for producing resin beads.
- the resin beads shown below are provided.
- the volume average particle size is 50 ⁇ m or less, the sphericity is 0.7 to 1.0, the surface smoothness is 80 to 100%, and the content of acetyl group is 15 mass. % Or less, and the content of propionyl group is 10% by mass or more.
- the resin bead according to any one of [1] to [6], wherein the resin bead contains at least one of an ultraviolet absorber and an ultraviolet scattering agent.
- the resin beads are treated beads treated with at least one selected from the group consisting of silicone, fatty acid, fatty acid metal salt, amino acid, and amino acid metal salt.
- the following method for producing resin beads is provided.
- a method for producing resin beads which comprises a step of adding water to the suspension to shrink the oil droplets.
- the organic solvent is at least one selected from the group consisting of a ketone solvent, an ester solvent, alcohols, glycols, an ether solvent, an alkyl halide, and an alkyl nitrate.
- the dispersion stabilizer is a water-soluble polymer.
- resin beads made of a synthetic material derived from petroleum which can provide various products such as cosmetics which are less likely to generate odor and have excellent tactile sensation and spread on the skin, can be replaced with resin beads. And various products such as cosmetics using the same can be provided.
- a resin that can replace resin particles made of a synthetic material derived from petroleum which is less likely to generate an odor and can provide various products such as cosmetics having an excellent tactile sensation and spread on the skin.
- a method for producing beads can be provided.
- the present inventor describes various resin beads made of natural materials and methods for producing the same, which can provide various products such as cosmetics having excellent tactile sensation, spread on the skin, transparency, and product stability. investigated. As a result, it has been found that, by adopting the configuration shown below, it is possible to obtain resin beads substantially formed of a natural material and capable of providing various products such as cosmetics to which the above-mentioned various characteristics are imparted. .. That is, the resin beads of the present invention are resin beads formed of a resin containing a cellulose derivative as a main component.
- the volume average particle size of the resin beads of the present invention is 50 ⁇ m or less, the sphericity is 0.7 to 1.0, the surface smoothness is 80 to 100%, and the acetyl group content is 25. It is mass% or less, and the content of propionyl group is 10 mass% or more.
- the volume average particle size of the resin beads is 50 ⁇ m or less, preferably 0.5 to 40 ⁇ m, and more preferably 1 to 30 ⁇ m. By setting the volume average particle size within the above range, the slipperiness and soft focus required for the resin beads blended in cosmetics and the like can be effectively exhibited.
- the sphericity of the resin beads is 0.7 or more and 1.0 or less, preferably 0.75 to 1.0 or less, more preferably 0.8 to 1.0 or less, and particularly preferably 0.85 to 0. It is 99 or less.
- the sphericity which is an index of whether or not the resin beads are spherical, can be measured and calculated according to the procedure shown below.
- SEM scanning electron microscope
- the circularity C of each resin bead is calculated from the following formula (1).
- the arithmetic mean value of the circularity C of 100 or more resin beads arbitrarily selected is defined as the sphericity.
- C (4 ⁇ S 1 ) / (L 2 ) ⁇ ⁇ ⁇ (1)
- S 1 indicates the area (projected area) of the resin beads occupied in the image
- L indicates the length of the outer peripheral portion of the resin beads in the image. The closer the value of circularity C is to 1, the closer the shape of the particle is to a true sphere.
- the surface smoothness of the resin beads is 80 to 100%, preferably 85 to 100%, and more preferably 90 to 99%. By setting the surface smoothness within the above range, it is possible to effectively exhibit the good tactile sensation and the elongation on the skin required for the resin beads blended in cosmetics and the like.
- S 2 indicates the area (projected area) of the resin beads occupied in the image
- S 3 is formed by the contours of the resin particles when the resin beads and a circle similar thereto are overlapped. It shows the total area of the beads, the area inside the contour of the overlapping circles, and the area outside.
- cellulose esters may be partially hydrolyzed to produce free acids. For this reason, resin beads formed of cellulose esters may have a problem of free acid odor depending on the product to which they are applied.
- resin beads formed of a resin containing a cellulose derivative as a main component the release of acetic acid caused by hydrolysis is suppressed by controlling (reducing) the content of acetyl group (CH 3 CO-), resulting in odor. Can be suppressed.
- the content of the acetyl group of the resin beads of the present invention is 25% by mass or less, preferably 20% by mass or less, more preferably 15% by mass or less, and particularly preferably 10% by mass or less.
- the content of acetyl groups in the resin beads can be adjusted, for example, by using a cellulose derivative having an acetyl group content within a predetermined range as a raw material.
- a cellulose derivative having an acetyl group content within a predetermined range As the cellulose derivative, a commercially available cellulose derivative may be used as it is, or a cellulose derivative whose acetyl group content is adjusted by hydrolysis or esterification according to a conventional method may be used. Further, a plurality of resin beads having different acetyl group contents may be mixed and controlled so that the acetyl group content of the entire resin beads is within a predetermined range.
- the content of the propionyl group (CH 3 CH 2 CO ⁇ ) of the resin beads is 10% by mass or more, preferably 15 to 60% by mass, and more preferably 20 to 50% by mass.
- the resin beads have the "moist texture" required for the resin beads blended in cosmetics and the like.
- the type of substituents in the ester portion of cellulose esters has a great influence on the tactile sensation of resin beads. Further, it is presumed that the tactile sensation of the resin beads is expressed by the unique properties of the substituent of the ester portion, the solubility of the cellulose esters in the organic solvent used in the production method described later, the orientation of the molecules in the suspension, and the like. Will be done. In particular, by appropriately setting the content of the propionyl group of the cellulose derivative used as a raw material, it is possible to develop a "moist touch".
- the content of propionyl groups in the resin beads can be adjusted, for example, by using a cellulose derivative having a propionyl group content within a predetermined range as a raw material.
- a cellulose derivative having a propionyl group content within a predetermined range As the cellulose derivative, a commercially available cellulose derivative may be used as it is, or a cellulose derivative whose content of propionyl group is adjusted by hydrolysis or esterification according to a conventional method may be used. Further, a plurality of resin beads having different propionyl group contents may be mixed and controlled so that the propionyl group content of the entire resin beads is within a predetermined range.
- the solidity of the resin beads is preferably 70 to 100% by volume, more preferably 75 to 100% by volume, and particularly preferably 80 to 99% by volume. By setting the solidity within the above range, the transparency required for the resin beads blended in cosmetics and the like can be effectively exhibited. If the solidity of the resin beads is less than 70% by volume, light scattering occurs depending on the airspace, and the transparency tends to decrease. In addition, the amount of oil absorbed changes as the solidity decreases. Therefore, when resin beads having a low solidity are blended into a product such as a cosmetic product, the stability of the product may be slightly lowered.
- the solidity of the resin beads can be measured and calculated according to the procedure shown below. First, the SEM image of the cross section of the resin beads taken with a scanning electron microscope (SEM) is image-analyzed, and the volume of the resin-filled portion of each resin bead is calculated. Then, the average value of the volumes of the resin-filled portions of 20 or more resin beads arbitrarily selected is defined as the solidity (volume%).
- SEM scanning electron microscope
- the resin constituting the resin beads of the present invention contains a cellulose derivative as a main component.
- the resin constituting the resin beads preferably consists of only a cellulose derivative.
- Cellulose derivatives are modified celluloses having three hydroxy groups in one unit.
- the cellulose derivative may be one in which one hydroxy group in cellulose is substituted with a specific substituent, or two hydroxy groups may be substituted with a specific substituent, or three hydroxy groups.
- the group may be substituted with a specific substituent.
- the structure of the substituent may be linear, branched, or cyclic.
- the cellulose derivative may be a salt.
- As the cellulose derivative a known cellulose derivative can be appropriately selected and used in consideration of the purpose of use of the resin beads. Of these, cellulose esters used in products such as cosmetics as natural cellulose derivatives are preferable.
- cellulose derivatives include methyl cellulose, ethyl cellulose, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, nitro cellulose, hydroxypropyl methyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose phthalate, hypromellose acetate succinate.
- examples thereof include acid esters, carboxymethyl cellulose and cellulose glycolate ethers.
- examples of cellulose acetate include acetyl cellulose, diacetyl cellulose, and triacetyl cellulose. These cellulose derivatives can be used alone or in combination of two or more.
- cellulose esters include methyl cellulose, ethyl cellulose, acetyl cellulose, diacetyl cellulose, triacetyl cellulose, cellulose acetate butyrate, cellulose acetate propionate and the like. Of these, cellulose acetate, cellulose acetate propionate, ethyl cellulose, hydroxypropyl methyl cellulose and the like are preferable.
- the resin beads may contain at least one of a pigment and a dye depending on the intended use.
- a suspension may be prepared using an oil phase further containing at least one of the pigment and dye.
- Pigments include metal oxides such as titanium dioxide, zinc oxide, petals (bengala), yellow iron oxide, and black iron oxide, as well as legal pigments Japanese names Yellow No. 4, Red No. 202, Blue No. 1, and carbon black. And so on.
- extender pigments such as mica, talc, kaolin, and calcium carbonate can also be used.
- the dye include Red No. 104, Yellow No. 5, Blue No. 1 and the like.
- the resin beads preferably contain a pigment and at least one of a surfactant, a dispersant, and a polymer dispersant.
- the pigment is preferably a treated pigment treated with at least one selected from the group consisting of silicones, fatty acids, fatty acid metal salts, amino acids, and amino acid metal salts.
- the resin beads may contain at least one of an ultraviolet absorber and an ultraviolet scattering agent, depending on the intended use.
- an ultraviolet absorber for example, a suspension may be prepared using an oil phase further containing at least one of the ultraviolet absorber and the ultraviolet scattering agent.
- the ultraviolet absorber include fine particle titanium dioxide, fine particle zinc oxide, silicic acid-based ultraviolet absorber, and dibenzoylmethane-based ultraviolet absorber.
- the resin beads are preferably treated beads treated with at least one selected from the group consisting of silicones, fatty acids, fatty acid metal salts, amino acids, and amino acid metal salts.
- the method for producing resin beads of the present invention is the above-mentioned method for producing resin beads, and contains an oil phase (first liquid) containing a cellulose derivative and an organic solvent that dissolves the cellulose derivative, and a dispersion stabilizer. It has a step (suspension preparation step) of mixing with an aqueous phase (second liquid) to prepare a suspension containing oil droplets containing a cellulose derivative and an organic solvent.
- the oil phase containing the cellulose derivative and the organic solvent that dissolves the cellulose derivative and the aqueous phase containing the dispersion stabilizer are mixed.
- a suspension in which oil droplets containing a cellulose derivative and an organic solvent are dispersed in water can be obtained. Since the oil droplets exist in a dispersed state in water, the organic solvent in the oil droplets gradually moves into the water. Then, as the organic solvent moves, the oil droplets shrink, and the cellulose derivative dissolved in the organic solvent gradually precipitates. The precipitated cellulose derivative grows while maintaining a smooth surface as shown in FIG. Eventually, the precipitated cellulose derivative is immobilized to form substantially solid resin beads.
- Whether or not the oil droplets have shrunk can be determined by analyzing an image observed with an optical microscope, an electron microscope, or the like. By causing such shrinkage of oil droplets, it is possible to obtain resin beads having a desired particle size, which has high sphericity (sphericity), is substantially solid, and has a smooth surface. .. Then, by using the resin beads thus obtained, it is possible to provide various products such as cosmetics, which are less likely to generate an odor and have an excellent tactile sensation and spread on the skin.
- the organic solvent (first organic solvent) contained in the oil phase a known organic solvent capable of dissolving the cellulose derivative can be used.
- the organic solvent include ester solvents such as methyl formate, ethyl formate, methyl acetate, ethyl acetate and butyl acetate; ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; ethanol, n-butanol and the like.
- Alcohols such as ethyl cellosolve, butyl cellosolve, ethylene glycol diethyl ether; glycol ether solvents such as dipropylene glycol monomethyl ether; glycol ester solvents such as propylene glycol monomethyl ether acetate; methylene chloride, chloroform, tetrachloroethane, etc. Chlorine-based solvent; nitromethane; propylene carbonate and the like can be used. These organic solvents can be used alone or in combination of two or more.
- a ketone solvent As the organic solvent, a ketone solvent, an ester solvent, alcohols, glycols, an ether solvent, an alkyl halide, and an alkyl nitrate are preferable. Of these, methyl ethyl ketone, ethyl acetate, butanol, propylene glycol monobutyl ether, propyl acetate and propylene glycol monomethyl ether acetate are even more preferable.
- the organic solvent in the oil droplets contained in the suspension gradually moves to the aqueous phase.
- the organic solvent tends to move rapidly from the oil droplets to the aqueous phase, so that the resin beads formed by the shrinkage of the oil droplets do not easily form a spherical shape. Or, it may be difficult to form a smooth surface.
- the aqueous phase tends to partially enter the oil droplets, and it may be difficult to form solid resin beads.
- the solubility (water solubility) of the organic solvent in 100 g of water at 25 ° C. is 0.1 to 50.0 g, preferably 0.5 to 40.0 g, and 1.0 to 30.0 g. It is more preferable to have.
- the amount of the organic solvent contained in the oil phase (first liquid) is preferably 2.0 times or more, preferably 2.5 to 15.0 times, based on the mass, with respect to the amount of the cellulose derivative. It is more preferable to have. If the amount of the organic solvent in the oil phase is too small, the cellulose derivative tends to rapidly precipitate when the organic solvent in the oil droplets moves to the aqueous phase. Therefore, it may be difficult for the obtained resin beads to have a spherical shape, or it may be difficult for a smooth surface to be formed.
- the aqueous phase used in the suspension preparation step is a liquid (second liquid) in which the dispersion stabilizer is dissolved in water such as deionized water.
- water-soluble polymers such as water-soluble cellulose, polyvinyl alcohol, and sodium polyacrylate; and inorganic salts such as hydroxyapatite, calcium tertiary phosphate, and calcium carbonate can be used.
- These dispersion stabilizers can be used alone or in combination of two or more.
- it is preferable to use a water-soluble polymer such as water-soluble cellulose, polyvinyl alcohol, and sodium polyacrylate.
- the content of the dispersion stabilizer in the aqueous phase is preferably 30% by mass or less, and more preferably 1 to 20% by mass.
- the aqueous phase preferably further contains a second organic solvent.
- the organic solvent (first organic solvent) in the oil phase may rapidly move to the aqueous phase depending on the type. Therefore, by mixing the aqueous phase containing the second organic solvent with the oil phase, it is possible to suppress the rapid movement of the first organic solvent in the oil phase to the aqueous phase, resulting in more sphericity. It is possible to produce resin beads having a high surface and a smoother surface.
- the second organic solvent the same one as the above-mentioned organic solvent (first organic solvent) used for the oil phase can be used, including a suitable one.
- the first organic solvent and the second organic solvent may be of the same type or different types.
- the oil phase and the aqueous phase are mixed to prepare a suspension.
- the oil phase may be added to the agitated aqueous phase, or the aqueous phase may be added to the agitated oil phase.
- an emulsifying device such as a disper or a homogenizer to adjust the particle size of the oil droplets formed.
- the particle size of the formed oil droplets can be easily adjusted by adjusting the shearing force by changing the rotation speed of the homogenizer. As a result, the particle size of the obtained resin beads can be appropriately adjusted so as to be within a desired range.
- the liquid volume of the aqueous phase is preferably 3.0 times or less, more preferably 0.2 to 2.8 times, based on the mass, with respect to the liquid volume of the oil phase.
- the method for producing resin beads of the present invention further includes a step (shrinkage step) of adding water to the suspension to shrink the oil droplets.
- a step shrinkage step
- the amount of water added to the suspension is preferably 0.5 times or more, more preferably 1 to 40 times, based on the mass, with respect to the amount of water in the suspension.
- the shrinkage step it is preferable to add water to the suspension over a certain period of time.
- water By adding water over a certain period of time, it is possible to suppress the rapid movement of the organic solvent in the oil droplets to the aqueous phase, producing resin beads with higher sphericity and a smoother surface. can do.
- the produced resin beads are filtered and washed to remove unnecessary components such as a dispersion stabilizer. Then, if necessary, washing is repeated a plurality of times, and then drying and crushing treatment are performed to obtain the desired resin beads.
- the above-mentioned resin beads are made of a natural material having high sphericity (sphericity), a smooth surface, a moist tactile sensation, good stability over time, and less generation of offensive odor. It is a resin particle. Therefore, by containing the above resin beads, cosmetics and outer skins that are provided with excellent tactile sensation, spread to the skin, and product stability without using resin particles made of a synthetic material derived from petroleum.
- Various products such as medicines, paints, molded products, films, coating agents, and resin compositions can be provided.
- Example 1 An oil phase was prepared by dissolving 100 parts of cellulose acetate propionate (trade name "CAP-482-0.5", manufactured by Eastman Chemical Company) in 350 parts of ethyl acetate (water solubility: 8 g / 100 g). Further, 24 parts of polyvinyl alcohol was dissolved in 300 parts of ion-exchanged water to prepare an aqueous phase. The oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver. Further, the mixture was stirred at 1800 rpm for 10 minutes using a dissolver to obtain a suspension in which oil droplets were uniformly dispersed. The volume average particle size of the oil droplets measured by observation and image analysis with an optical microscope was 15 ⁇ m.
- FIG. 1 shows an electron micrograph showing the state of the cross section of the obtained resin beads.
- Example 2 Cellulose acetate propionate (trade name "CAP-482-0.5", manufactured by Eastman Chemical Company) 100 parts, ethyl acetate (water solubility: 8 g / 100 g) 350 parts and methyl acetate (water solubility: 24.4 g /) 100 g)
- the oil phase was prepared by dissolving in 50 parts. Further, 42 parts of polyvinyl alcohol was dissolved in 400 parts of ion-exchanged water to prepare an aqueous phase. The oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver.
- the mixture was stirred at 1,600 rpm for 10 minutes using a dissolver to obtain a suspension in which oil droplets were uniformly dispersed.
- the volume average particle size of the oil droplets measured by observation and image analysis with an optical microscope was 18 ⁇ m.
- resin particle dispersion While stirring the suspension obtained using the dissolver at 500 rpm, 5,000 parts of ion-exchanged water was injected over 60 minutes to obtain a resin particle dispersion (resin bead dispersion). After filtering and washing the resin particles, they were gelatinized in ion-exchanged water. Further, after filtration and washing, drying and crushing treatment were performed to obtain resin beads.
- Example 3 An oil phase was prepared by dissolving 100 parts of cellulose acetate propionate (trade name "CAP-504-0.2", manufactured by Eastman Chemical Company) in 500 parts of ethyl acetate (water solubility: 8 g / 100 g). Further, 56 parts of polyvinyl alcohol was dissolved in 560 parts of ion-exchanged water, and then 40 parts of ethyl acetate was added to prepare an aqueous phase. The oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver. Further, the mixture was stirred at 1,500 rpm for 10 minutes using a dissolver to obtain a suspension in which oil droplets were uniformly dispersed. The volume average particle size of the oil droplets measured by observation and image analysis with an optical microscope was 23 ⁇ m.
- the mixture was stirred at 2,000 rpm for 10 minutes using a dissolver to obtain a suspension in which oil droplets were uniformly dispersed.
- the volume average particle size of the oil droplets measured by observation and image analysis with an optical microscope was 12 ⁇ m.
- Example 5 Resin beads were obtained in the same manner as in Example 1 above, except that 100 parts of cellulose acetate propionate was changed to 35 parts of diacetyl cellulose (trade name "CA-398-6", manufactured by Eastman Chemical Company). rice field. 30 parts of the obtained resin beads and 70 parts of the resin beads obtained in Example 3 were mixed to obtain the resin beads of Example 5.
- Example 6 The resin beads obtained in Example 3 were partially hydrolyzed according to a conventional method, and then filtered, washed, dried, and crushed to obtain the resin beads of Example 6.
- Example 7 An oil phase was prepared by dissolving 89 parts of cellulose acetate propionate (trade name "CAP-504-0.2", manufactured by Eastman Chemical Company) in 700 parts of 1-butanol (water solubility: 8 g / 100 g). 10 parts of fatty acid-treated fine particle titanium oxide (trade name "MT-100TV", manufactured by TAYCA) and 1 part of acrylic silicone dispersant (trade name "KP-578", manufactured by Shin-Etsu Chemical Co., Ltd.) were added and mixed and dispersed. , An oil phase in which fine particles of titanium oxide were dispersed was prepared. Further, 50 parts of polyacrylic acid was dissolved in 850 parts of ion-exchanged water to prepare an aqueous phase.
- the oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver. Further, the mixture was stirred at 2,500 rpm for 20 minutes using a dissolver to obtain a suspension in which oil droplets were uniformly dispersed.
- the volume average particle size of the oil droplets measured by observation and image analysis with an optical microscope was 10 ⁇ m.
- resin particle dispersion While stirring the suspension obtained using the dissolver at 500 rpm, 9,000 parts of ion-exchanged water was injected over 60 minutes to obtain a resin particle dispersion (resin bead dispersion). After filtering and washing the resin particles, they were gelatinized in ion-exchanged water. Further, after filtration and washing, drying and crushing treatment were performed to obtain resin beads.
- Example 8 An oil phase was prepared by dissolving 80 parts of cellulose acetate propionate (trade name "CAP-482-0.5", manufactured by Eastman Chemical Company) in 400 parts of ethyl acetate (water solubility: 8 g / 100 g). 20 parts of amino acid-treated particle titanium oxide (trade name "NAI-titanium CR-50", manufactured by Miyoshi Kasei Co., Ltd.) was added and mixed and dispersed to prepare an oil phase in which titanium oxide was dispersed. Further, 32 parts of polyvinyl alcohol was dissolved in 400 parts of ion-exchanged water to prepare an aqueous phase.
- the oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver. Further, the mixture was stirred at 1,600 rpm for 10 minutes using a dissolver to obtain a suspension in which oil droplets were uniformly dispersed.
- the volume average particle size of the oil droplets measured by observation and image analysis with an optical microscope was 14 ⁇ m.
- Comparative Example 1 Cellulose fine particles (trade name "CELLULOBEADS D-5", manufactured by Daito Kasei Seisakusho Co., Ltd.) were used as the resin beads of Comparative Example 1.
- An oil phase was prepared by dissolving 35 parts of diacetylcellulose (trade name "CA-398-6", manufactured by Eastman Chemical Company) in 350 parts of acetone (water solubility: ⁇ g / 100 g). Further, 15 parts of polyvinyl alcohol was dissolved in 300 parts of ion-exchanged water to prepare an aqueous phase. The oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver. Further, the mixture was stirred at 1800 rpm for 10 minutes using a dissolver to obtain a suspension. The volume average particle size of the suspension measured by observation and image analysis with an optical microscope was 80 ⁇ m.
- An oil phase was prepared by dissolving 35 parts of diacetylcellulose (trade name "CA-398-6", manufactured by Eastman Chemical Company) in 350 parts of ethyl acetate (water solubility: 8 g / 100 g). Further, 15 parts of polyvinyl alcohol was dissolved in 300 parts of ion-exchanged water to prepare an aqueous phase. The oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver. Further, the mixture was stirred at 1,500 rpm for 10 minutes using a dissolver to obtain a suspension. The volume average particle size of the suspension measured by observation and image analysis with an optical microscope was 16 ⁇ m.
- An oil phase was prepared by dissolving 35 parts of diacetylcellulose (trade name "CA-398-6", manufactured by Eastman Chemical Company) in 350 parts of ethyl acetate (water solubility: 8 g / 100 g). Further, 15 parts of polyvinyl alcohol was dissolved in 300 parts of ion-exchanged water to prepare an aqueous phase. The oil phase was added to the prepared aqueous phase, mixed, and stirred at 1,000 rpm for 3 minutes using a dissolver. Further, the mixture was stirred at 1,500 rpm for 10 minutes using a dissolver to obtain a suspension. The volume average particle size of the suspension measured by observation and image analysis with an optical microscope was 16 ⁇ m.
- S 1 indicates the area (projected area) of the resin beads occupied in the image
- L indicates the length of the outer peripheral portion of the resin beads in the image. The closer the value of circularity C is to 1, the closer the shape of the particle is to a true sphere.
- S 2 indicates the area (projected area) of the resin beads occupied in the image
- S 3 is formed by the contours of the resin particles when the resin beads and a circle similar thereto are overlapped. The total of the area and the area inside and outside the contour of the overlapping circles is shown.
- the odor of the resin beads was sensory evaluated by a panel test of 5 people. 4.0 g of the resin beads and pure water having a water content of 10% of the resin beads were placed in a sealable glass bottle containing 30 mL, sealed, and subjected to an accelerated test in a constant temperature bath at 70 ° C. for 7 days. After cooling to room temperature, the lid was opened and the change in odor was confirmed. The odor of the resin beads before the acceleration test was compared as a reference odor, and the scores were given on a scale of 5 according to the evaluation criteria shown below, and the average score of 5 persons was calculated. The results are shown in Table 1. 5: I don't feel the change 4: I feel a little change 3: I feel a change 2: I feel a little strong change 1: I feel a strong change
- Cosmetic-1 was produced by mixing various components conventionally used as raw materials for cosmetics. Specifically, first, each silicone-treated powder (mica, talc, fine particle titanium oxide, and barium sulfate) and each resin bead are blended in the blending amounts shown in Table 2 and mixed until uniform. To obtain a powder mixture. Next, a mixture (other components) obtained by mixing petrolatum, squalane, and glyceryl trioctanoate is added to the powder mixture, mixed until uniform, filled in a container, and press-molded as necessary for makeup. I got a charge of -1.
- Cosmetics-2 which is a sun-cut emulsion.
- silicone oil, UV protection agent, emulsifier, dispersant, isotridecyl isononanoate, and each resin bead were blended in the blending amounts shown in Table 3 and mixed to prepare an oil phase component.
- purified water, dipropylene glycol, sodium chloride, and sodium citrate were blended in the blending amounts shown in Table 3 and mixed to prepare an aqueous phase component.
- the aqueous phase component was added to the prepared oil phase component with stirring and emulsified to obtain Cosmetic-2.
- the resin beads of the present invention have characteristics equal to or higher than those of resin beads formed of a synthetic material derived from petroleum. Therefore, if the resin beads of the present invention are used, even if the resin beads formed of a synthetic material derived from petroleum are not used, the resin beads have a good tactile sensation, spread well on the skin, have a transparent feeling, and are of good quality. It is possible to provide products such as stable cosmetics. Therefore, the resin beads of the present invention are useful as constituent materials for various products such as cosmetics, outer skin agents, paints, molded products, films, coating agents, and resin compositions.
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Abstract
Description
[1]セルロース誘導体を主成分とする樹脂で形成された樹脂ビーズであって、前記セルロース誘導体が、セルロースアセテート、セルロースアセテートプロピオネート、エチルセルロース、及びヒドロキシプロピルメチルセルロースからなる群より選択される少なくとも一種であり、体積平均粒子径が、50μm以下であり、真球度が、0.7~1.0であり、表面平滑度が、80~100%であり、アセチル基の含有率が、15質量%以下であり、プロピオニル基の含有率が、10質量%以上である樹脂ビーズ。
[2]前記セルロース誘導体が、セルロースアセテートプロピオネートである前記[1]に記載の樹脂ビーズ。
[3]中実度が、70~100体積%である前記[1]又は[2]に記載の樹脂ビーズ。
[4]前記樹脂ビーズが、顔料及び染料の少なくともいずれかを含有する前記[1]~[3]のいずれかに記載の樹脂ビーズ。
[5]前記樹脂ビーズが、顔料と、界面活性剤及び分散剤及び高分子分散剤の少なくともいずれかと、を含有する前記[1]~[4]のいずれかに記載の樹脂ビーズ。
[6]前記顔料が、シリコーン、脂肪酸、脂肪酸金属塩、アミノ酸、及びアミノ酸金属塩からなる群より選択される少なくとも一種で処理された処理顔料である前記[4]又は[5]に記載の樹脂ビーズ。
[7]前記樹脂ビーズが、紫外線吸収剤及び紫外線散乱剤の少なくともいずれかを含有する前記[1]~[6]のいずれかに記載の樹脂ビーズ。
[8]前記樹脂ビーズが、シリコーン、脂肪酸、脂肪酸金属塩、アミノ酸、及びアミノ酸金属塩からなる群より選択される少なくとも一種で処理された処理ビーズである前記[1]~[7]のいずれかに記載の樹脂ビーズ。
[9]前記[1]~[8]のいずれかに記載の樹脂ビーズの製造方法であって、前記セルロース誘導体及び前記セルロース誘導体を溶解する、25℃における水100gに対する溶解度が0.1~50.0gである有機溶剤を含有する油相と、分散安定化剤を含有する水相と、を混合して、前記セルロース誘導体及び前記有機溶剤を含有する油滴を含む懸濁液を調製する工程と、前記懸濁液に水を添加して前記油滴を収縮させる工程と、を有する樹脂ビーズの製造方法。
[10]前記懸濁液に30分以上かけて前記水を添加する前記[9]に記載の樹脂ビーズの製造方法。
[11]前記懸濁液に添加する前記水の液量が、前記懸濁液の液量に対して、質量基準で0.5倍以上である前記[9]又は[10]に記載の樹脂ビーズの製造方法。
[12]前記水相が、第2の有機溶剤をさらに含有する前記[9]~[11]のいずれかに記載の樹脂ビーズの製造方法。
[13]前記水相の液量が、前記油相の液量に対して、質量基準で3.0倍以下である前記[9]~[12]のいずれかに記載の樹脂ビーズの製造方法。
[14]前記有機溶剤が、ケトン系溶剤、エステル系溶剤、アルコール類、グリコール類、エーテル系溶剤、ハロゲン化アルキル、及びニトロ化アルキルからなる群より選択される少なくとも一種である前記[9]~[13]のいずれかに記載の樹脂ビーズの製造方法。
[15]前記有機溶剤の液量が、前記セルロース誘導体の量に対して、質量基準で2.0倍以上である前記[9]~[14]のいずれかに記載の樹脂ビーズの製造方法。
[16]前記分散安定化剤が、水溶性高分子である前記[9]~[15]のいずれかに記載の樹脂ビーズの製造方法。
[17]前記水相中の前記分散安定化剤の含有量が、30質量%以下である前記[9]~[16]のいずれかに記載の樹脂ビーズの製造方法。
[18]樹脂ビーズを含有する、化粧料、外皮用薬、塗料、成形体、フィルム、コーティング剤、及び樹脂組成物のいずれかの製品であって、前記樹脂ビーズが、前記[1]~[8]のいずれかに記載の樹脂ビーズである製品。
C=(4πS1)/(L2) ・・・(1)
M=(1-(S3)/(S2))×100 ・・・(2)
(実施例1)
セルロースアセテートプロピオネート(商品名「CAP-482-0.5」、イーストマンケミカル社製)100部を酢酸エチル(水溶解度:8g/100g)350部に溶解して油相を調製した。また、ポリビニルアルコール24部をイオン交換水300部に溶解して水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて1,800rpmで10分間撹拌して、油滴が均一に分散した懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した油滴の体積平均粒子径は、15μmであった。
セルロースアセテートプロピオネート(商品名「CAP-482-0.5」、イーストマンケミカル社製)100部を酢酸エチル(水溶解度:8g/100g)350部及び酢酸メチル(水溶解度:24.4g/100g)50部に溶解して油相を調製した。また、ポリビニルアルコール42部をイオン交換水400部に溶解して水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて1,600rpmで10分間撹拌して、油滴が均一に分散した懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した油滴の体積平均粒子径は、18μmであった。
セルロースアセテートプロピオネート(商品名「CAP-504-0.2」、イーストマンケミカル社製)100部を酢酸エチル(水溶解度:8g/100g)500部に溶解して油相を調製した。また、ポリビニルアルコール56部をイオン交換水560部に溶解させた後、酢酸エチル40部を加えて水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて1,500rpmで10分間撹拌して、油滴が均一に分散した懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した油滴の体積平均粒子径は、23μmであった。
セルロースアセテートプロピオネート(商品名「CAP-504-0.2」、イーストマンケミカル社製)50部及び、ジアセチルセルロース(商品名「CA-398-10」、イーストマンケミカル社製)50部をイソプロピルアセテート(水溶解度:4g/100g)1000部に溶解して油相を調製した。また、ポリビニルアルコール300部をイオン交換水2700部に溶解させて水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて2,000rpmで10分間撹拌して、油滴が均一に分散した懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した油滴の体積平均粒子径は、12μmであった。
セルロースアセテートプロピオネート100部を、ジアセチルセルロース(商品名「CA-398-6」、イーストマンケミカル社製)35部に変更したこと以外は、前述の実施例1と同様にして樹脂ビーズを得た。得られた樹脂ビーズ30部と、実施例3で得た樹脂ビーズ70部とを混合して、実施例5の樹脂ビーズを得た。
実施例3で得た樹脂ビーズを常法にしたがって一部加水分解した後、ろ過、洗浄、乾燥、及び解砕処理して、実施例6の樹脂ビーズを得た。
セルロースアセテートプロピオネート(商品名「CAP-504-0.2」、イーストマンケミカル社製)89部を1-ブタノール(水溶解度:8g/100g)700部に溶解して油相を調製した。脂肪酸処理した微粒子酸化チタン(商品名「MT-100TV」、テイカ社製)10部及び、アクリルシリコーン分散剤(商品名「KP-578」、信越化学社製)1部を加えて混合・分散し、微粒子酸化チタンが分散した油相を調製した。また、ポリアクリル酸50部をイオン交換水850部に溶解させ水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて2,500rpmで20分間撹拌して、油滴が均一に分散した懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した油滴の体積平均粒子径は、10μmであった。
セルロースアセテートプロピオネート(商品名「CAP-482-0.5」、イーストマンケミカル社製)80部を酢酸エチル(水溶解度:8g/100g)400部に溶解して油相を調製した。アミノ酸処理した粒子酸化チタン(商品名「NAI-チタンCR-50」、三好化成社製)20部を加えて混合・分散し、酸化チタンが分散した油相を調製した。また、ポリビニルアルコール32部をイオン交換水400部に溶解させ水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて1,600rpmで10分間撹拌して、油滴が均一に分散した懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した油滴の体積平均粒子径は、14μmであった。
セルロース微粒子(商品名「CELLULOBEADS D-5」、大東化成品社製)を比較例1の樹脂ビーズとした。
ジアセチルセルロース(商品名「CA-398-6」、イーストマンケミカル社製)35部をアセトン(水溶解度:∞g/100g)350部に溶解して油相を調製した。また、ポリビニルアルコール15部をイオン交換水300部に溶解して水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて1,800rpmで10分間撹拌して、懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した懸濁液の体積平均粒子径は、80μmであった。
ジアセチルセルロース(商品名「CA-398-6」、イーストマンケミカル社製)35部を酢酸エチル(水溶解度:8g/100g)350部に溶解して油相を調製した。また、ポリビニルアルコール15部をイオン交換水300部に溶解して水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて1,500rpmで10分間撹拌して、懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した懸濁液の体積平均粒子径は、16μmであった。
ジアセチルセルロース(商品名「CA-398-6」、イーストマンケミカル社製)35部を酢酸エチル(水溶解度:8g/100g)350部に溶解して油相を調製した。また、ポリビニルアルコール15部をイオン交換水300部に溶解して水相を調製した。調製した水相に油相を加えて混合し、ディゾルバーを用いて1,000rpmで3分間撹拌した。さらに、ディゾルバーを用いて1,500rpmで10分間撹拌して、懸濁液を得た。光学顕微鏡で観察及び画像解析して測定した懸濁液の体積平均粒子径は、16μmであった。
(体積平均粒子径)
コールターカウンター(ベックマン・コールター社製)を使用して樹脂ビーズの体積平均粒子径を測定した。結果を表1に示す。
走査型電子顕微鏡(SEM)で撮影した樹脂ビーズのSEM画像を画像解析し、下記式(1)より、個々の樹脂ビーズの円形度Cを算出する。そして、任意に選択した100個以上の樹脂ビーズの円形度Cの相加平均値を真球度とした。結果を表1に示す。
C=(4πS1)/(L2) ・・・(1)
走査型電子顕微鏡(SEM)で撮影した樹脂ビーズのSEM画像(×5,000)を観察し、下記式(2)より、個々の樹脂ビーズの平滑度Mを算出する。そして、任意に選択した100個以上の樹脂ビーズの平滑度Mの相加平均値を表面平滑度とした。結果を表1に示す。平滑度Mの値が1に近いほど、粒子の表面は平滑に近い。
M=(1-(S3)/(S2))×100 ・・・(2)
走査型電子顕微鏡(SEM)で撮影した樹脂ビーズの断面のSEM画像を画像解析し、個々の樹脂ビーズの、樹脂で満たされた部分の体積を算出する。そして、任意に選択した20個以上の樹脂ビーズの、樹脂で満たされた部分の体積の平均値を中実度(体積%)とした。結果を表1に示す。
特表2006-523752号公報の記載内容(主として、段落[0136]~[0145]の記載内容)に準じて、樹脂ビーズのアセチル基の含有率及びプロピオニル基の含有率を測定及び算出した。結果を表1に示す。
樹脂ビーズの触感について、10人のパネルテストによる官能評価を行った。樹脂ビーズに触れ、「滑らかさ」、「肌への伸びの良さ」、及び「しっとり感」を総合的に判断し、以下に示す評価基準にしたがって5点満点で採点し、10人の平均点を算出した。結果を表1に示す。
5:良い
4:やや良い
3:普通
2:やや悪い
1:悪い
樹脂ビーズの臭気について、5人のパネルテストによる官能評価を行った。樹脂ビーズ4.0g、及び樹脂ビーズの水分量が10%となる量の純水を30mL容の密封可能なガラス瓶に入れ、密封して70℃の恒温槽で7日間促進試験を行った。室温まで冷却した後、蓋を開けて臭気の変化を確認した。促進試験前の樹脂ビーズの臭気を基準臭として比較し、以下に示す評価基準にしたがって5点満点で採点し、5人の平均点を算出した。結果を表1に示す。
5:変化を感じない
4:やや変化を感じる
3:変化を感じる
2:やや強い変化を感じる
1:強い変化を感じる
(化粧料-1)
化粧料の原料として従来用いられている各種成分を混合して化粧料-1を製造した。具体的には、まず、シリコーン処理された各粉体(マイカ、タルク、微粒子酸化チタン、及び硫酸バリウム)と、各樹脂ビーズとを、表2に示す配合量で配合し、均一になるまで混合して粉体混合物を得た。次いで、ワセリン、スクワラン、及びトリオクタン酸グリセリルを混合して得た混合物(その他の成分)を粉体混合物に加え、均一なるまで混合した後、容器に充填し、必要に応じてプレス成型して化粧料-1を得た。
化粧料の原料として従来用いられている各種成分を混合して、サンカット乳液である化粧料-2を製造した。具体的には、まず、シリコーンオイル、紫外線防御剤、乳化剤、分散剤、イソノナン酸イソトリデシル、及び各樹脂ビーズを表3に示す配合量で配合し、混合して油相成分を調製した。また、精製水、ジプロピレングリコール、塩化ナトリウム、及びクエン酸ナトリウムを表3に示す配合量で配合し、混合して水相成分を調製した。次いで、調製した油相成分に水相成分を撹拌しながら添加して乳化させ、化粧料-2を得た。
(触感、肌への伸び)
化粧料-1の触感及び肌への伸びについて、10人のパネルテストによる官能評価を行った。「触感の良さ」及び「肌への伸び」を判断し、以下に示す評価基準にしたがってそれぞれ5点満点で採点し、10人の平均点を算出した。結果を表4に示す。
5:良い
4:やや良い
3:普通
2:やや悪い
1:悪い
化粧料-1の臭気について、5人のパネルテストによる官能評価を行った。化粧料-1(粉体)4.0gを30mL容の密封可能なガラス瓶に入れ、密封して70℃の恒温槽で7日間促進試験を行った。室温まで冷却した後、蓋を開けて臭気の変化を確認した。促進試験前の粉体の臭気を基準臭として比較し、以下に示す評価基準にしたがって5点満点で採点し、5人の平均点を算出した。結果を表4に示す。
5:変化を感じない
4:やや変化を感じる
3:変化を感じる
2:やや強い変化を感じる
1:強い変化を感じる
(触感、肌への伸び、透明性)
化粧料-2の触感、肌への伸び、及び透明性について、10人のパネルテストによる官能評価を行った。「触感の良さ」、「肌への伸び」、及び「透明性」を判断し、以下に示す評価基準にしたがってそれぞれ5点満点で採点し、10人の平均点を算出した。結果を表5に示す。
5:良い
4:やや良い
3:普通
2:やや悪い
1:悪い
化粧料-2の臭気について、5人のパネルテストによる官能評価を行った。化粧料-2(液体)4.0gを30mL容の密封可能なガラス瓶に入れ、密封して70℃の恒温槽で7日間促進試験を行った。室温まで冷却した後、蓋を開けて臭気の変化を確認した。促進試験前の液体の臭気を基準臭として比較し、以下に示す評価基準にしたがって5点満点で採点し、5人の平均点を算出した。結果を表5に示す。
5:変化を感じない
4:やや変化を感じる
3:変化を感じる
2:やや強い変化を感じる
1:強い変化を感じる
Claims (18)
- セルロース誘導体を主成分とする樹脂で形成された樹脂ビーズであって、
前記セルロース誘導体が、セルロースアセテート、セルロースアセテートプロピオネート、エチルセルロース、及びヒドロキシプロピルメチルセルロースからなる群より選択される少なくとも一種であり、
体積平均粒子径が、50μm以下であり、
真球度が、0.7~1.0であり、
表面平滑度が、80~100%であり、
アセチル基の含有率が、15質量%以下であり、
プロピオニル基の含有率が、10質量%以上である樹脂ビーズ。 - 前記セルロース誘導体が、セルロースアセテートプロピオネートである請求項1に記載の樹脂ビーズ。
- 中実度が、70~100体積%である請求項1又は2に記載の樹脂ビーズ。
- 前記樹脂ビーズが、顔料及び染料の少なくともいずれかを含有する請求項1~3のいずれか一項に記載の樹脂ビーズ。
- 前記樹脂ビーズが、顔料と、界面活性剤及び分散剤及び高分子分散剤の少なくともいずれかと、を含有する請求項1~4のいずれか一項に記載の樹脂ビーズ。
- 前記顔料が、シリコーン、脂肪酸、脂肪酸金属塩、アミノ酸、及びアミノ酸金属塩からなる群より選択される少なくとも一種で処理された処理顔料である請求項4又は5に記載の樹脂ビーズ。
- 前記樹脂ビーズが、紫外線吸収剤及び紫外線散乱剤の少なくともいずれかを含有する請求項1~6のいずれか一項に記載の樹脂ビーズ。
- 前記樹脂ビーズが、シリコーン、脂肪酸、脂肪酸金属塩、アミノ酸、及びアミノ酸金属塩からなる群より選択される少なくとも一種で処理された処理ビーズである請求項1~7のいずれか一項に記載の樹脂ビーズ。
- 請求項1~8のいずれか一項に記載の樹脂ビーズの製造方法であって、
前記セルロース誘導体及び前記セルロース誘導体を溶解する、25℃における水100gに対する溶解度が0.1~50.0gである有機溶剤を含有する油相と、分散安定化剤を含有する水相と、を混合して、前記セルロース誘導体及び前記有機溶剤を含有する油滴を含む懸濁液を調製する工程と、
前記懸濁液に水を添加して前記油滴を収縮させる工程と、
を有する樹脂ビーズの製造方法。 - 前記懸濁液に30分以上かけて前記水を添加する請求項9に記載の樹脂ビーズの製造方法。
- 前記懸濁液に添加する前記水の液量が、前記懸濁液の液量に対して、質量基準で0.5倍以上である請求項9又は10に記載の樹脂ビーズの製造方法。
- 前記水相が、第2の有機溶剤をさらに含有する請求項9~11のいずれか一項に記載の樹脂ビーズの製造方法。
- 前記水相の液量が、前記油相の液量に対して、質量基準で3.0倍以下である請求項9~12のいずれか一項に記載の樹脂ビーズの製造方法。
- 前記有機溶剤が、ケトン系溶剤、エステル系溶剤、アルコール類、グリコール類、エーテル系溶剤、ハロゲン化アルキル、及びニトロ化アルキルからなる群より選択される少なくとも一種である請求項9~13のいずれか一項に記載の樹脂ビーズの製造方法。
- 前記有機溶剤の液量が、前記セルロース誘導体の量に対して、質量基準で2.0倍以上である請求項9~14のいずれか一項に記載の樹脂ビーズの製造方法。
- 前記分散安定化剤が、水溶性高分子である請求項9~15のいずれか一項に記載の樹脂ビーズの製造方法。
- 前記水相中の前記分散安定化剤の含有量が、30質量%以下である請求項9~16のいずれか一項に記載の樹脂ビーズの製造方法。
- 樹脂ビーズを含有する、化粧料、外皮用薬、塗料、成形体、フィルム、コーティング剤、及び樹脂組成物のいずれかの製品であって、
前記樹脂ビーズが、請求項1~8のいずれか一項に記載の樹脂ビーズである製品。
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US20230136180A1 (en) | 2023-05-04 |
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