JP4858977B2 - Powder cosmetic manufacturing method and powder cosmetic - Google Patents

Description

  The present invention relates to a method for producing a powder cosmetic and a powder cosmetic obtained by the production method. More specifically, the present invention relates to a method for producing a powder makeup such as a foundation or a makeup base that is excellent in use feeling and makeup durability.

  Powder cosmetics typified by powdery foundations have conventionally used powder components and oily components as binders using a stirring mixer such as Henschel mixer (registered trademark), Nauter mixer (registered trademark), ribbon blender, etc. Etc. and the mixture was pulverized with a pulverizer such as a pulverizer, and then filled in a metal or resin inner dish, or further dry press molded.

  This method takes the form of dry mixing in which the powder component and a small amount of oily component as a binder are mixed without adding a solvent, and dry molding in which pressure molding is performed in a dry powder state. This is called the dry process and has been used for a long time.

  In recent years, various methods relating to mixing and molding have been developed for powder cosmetics in order to improve characteristics such as the feeling of use. For example, wet mixing is performed in which a powder component and an oil component are added to a volatile solvent to form a slurry, and then the vessel is filled in a slurry state, and the solvent is removed by vacuum suction or the like to solidify the powder (wet The manufacturing method of the powder cosmetics called "molding" is proposed, and is called the wet manufacturing method (patent documents 1, 2).

In addition, various devices for use in wet mixing in which a powder component and oil are mixed in a volatile solvent have been widely studied. Specifically, the following production methods can be mentioned.
(1) A medium stirring mill is used for wet mixing. After the obtained slurry is filled in the container, it is wet-molded by suction pressing, or the solvent is removed from the obtained slurry to obtain a dry powder, and the dry powder is further pulverized by a pulverizer and then dried. A solid powder cosmetic is obtained by molding (Patent Document 3).
(2) The powder, oil, and solvent are mixed with each other using a meshing type twin screw extruder. The solvent is removed from the obtained slurry to obtain a dry powder, and the dry powder is further pulverized by a pulverizer, followed by dry molding to obtain a solid powder cosmetic (Patent Document 4).
(3) After obtaining a pulverized solution obtained by pulverizing a polymer powder in a volatile solvent using a medium stirring mill, the pulverized solution and a powder such as pigment are mixed with a wet mixer such as a disper to obtain a slurry. . A volatile solvent is removed from the obtained slurry to obtain a dry powder, and further pulverized by a pulverizer, followed by dry molding to obtain a solid powder cosmetic (Patent Document 5).

  Thus, the examination regarding the process of performing wet mixing is actively performed. However, the process of obtaining a dry powder from a slurry and the process of molding a solid powder cosmetic are not so much studied, and the method of suction pressing after filling the slurry in a middle dish container (wet molding) In general, a dry powder is obtained by drying using a normal dryer such as a vacuum dryer, and then the dry powder is further pulverized by a Henschel mixer, a pulverizer, or the like to perform dry molding.

  However, solid powder cosmetics obtained by wet molding generally have good quality with respect to the feeling of use when applied to the skin, but the obtained powder solid cosmetics become too hard, resulting in puffing. Regarding usability such as Notore, it was not fully satisfactory.

  Also, before filling the container, the slurry is dried to obtain a dry powder, and when this dry powder is filled into the container and dry molding is performed, it is applied to the skin due to aggregation of the powder components at the time of drying. The feeling of use is not good. Even when this dry powder was further pulverized and then subjected to dry molding, the feeling of use when applied to the skin was not satisfactory as compared with that obtained by the wet process. Furthermore, since it is necessary to dry the slurry and further crush it with a pulverizer, it cannot be said that it is excellent in terms of productivity and work environment.

  On the other hand, the powder cosmetic obtained by the wet process is easily blended with the sebum secreted from the skin after applying the cosmetic because the oily component is uniformly coated on the powder by slurry mixing in a volatile solvent. For this reason, there has been a drawback that the makeup holding effect is deteriorated such that the decorative film gets wet and dark, and the powder is liable to be squeezed.

  As a solution for improving the longevity of powder cosmetics, by adding powder that has been treated with fluorine (treated with a compound having a perfluoroalkyl group), the resistance to sebum (hardness to wet) is improved, and powder due to wetting A technology for preventing a decrease in brightness and saturation (dullness) has been developed (Patent Documents 6 to 16).

  However, when blended with powdered solid cosmetics such as foundations, the fluorinated powder is inadequate in impact resistance as a product due to its incompatibility with oil used as a binder, or has an affinity for the skin. Since it is low, adhesion to the skin may be poor.

  Although Patent Document 11 has a general description of powders treated with perfluoroalkylsilane, (A) 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane {compound (I ): Hereinafter, in the present specification, there is no specific description regarding the treated powder by which the compound (I) may be simply referred to.

  Thereafter, as a method for solving these problems, specific fluorine-based oils are combined (Patent Documents 17 to 20), or a compound having a perfluoroalkyl group and a long-chain acylamino acid are surface-treated together (Patent Document 21). Some improvement has been achieved by using zinc oxide together (Patent Document 22), but it is still not sufficient.

  On the other hand, as for hydroxyapatite, examples of blending it into cosmetics by paying attention to its sebum adsorption characteristics (Patent Document 23) and examples of mechanochemical compounding on spherical powder (Patent Document 24) can be mentioned. However, these patent documents do not contain any description in combination with the treated powder of the compound (I) of the present invention.

  Furthermore, an example of a cosmetic is described in which a composite powder obtained by coating hydroxyapatite on a plate-like powder and powders treated with a perfluoroalkyl phosphate ester salt are blended (Patent Document 25). However, there is no description regarding the powder treated with the compound (I) of the present invention. Further, the powder treated with the perfluoroalkyl phosphate ester salt is not preferable because it tends to have a poor feeling in use as compared with the powder treated with the compound (I).

  Patent Documents 26 and 27 describe examples in which hydroxyapatite is blended in cosmetics. Further, Patent Document 28 describes a composite powder in which hydroxyapatite having an average particle diameter of 1/5 or less of the spherical particles is combined with the surface of organic or inorganic spherical particles having an average particle diameter of 1 to 100 μm. ing.

Japanese Patent Publication No. 61-54766 JP-A-7-277924 Japanese Patent No. 3608778 JP 2004-67602 A Japanese Patent Laid-Open No. 9-30926 Japanese Patent Publication No. 5-86984 Japanese Patent No. 2597492 Japanese Patent No. 2597494 Japanese Patent No. 2,698,819 Japanese Patent No. 2646253 JP-A-2-218603 JP 2000-186016 A JP 2000-336012 A JP 2001-64114 A JP 2001-152050 A Special table 2003-518024 gazette Japanese Examined Patent Publication No. 6-102607 Japanese Patent Publication No.7-119168 Japanese Patent Publication No. 8-25856 Japanese Patent No. 2521398 JP-A-5-93153 Patent No. 3073877 JP-A-8-133842 Japanese Patent No. 2893541 JP 2000-169122 A JP-A-11-292524 JP 2000-143443 A Japanese Patent Publication No. 6-92288

  The objective of this invention is providing the manufacturing method which improved the quality side of powder cosmetics and improved the productivity in a manufacturing process. Another object of the present invention is to provide a powder cosmetic with excellent makeup (prevention of makeup collapse), in particular, a powder makeup cosmetic such as a foundation or makeup base, by the production method of the present invention.

  In light of the background art described above, the present inventors have conducted extensive research to achieve the above-described object, and as a result, used a powder of a perfluoroalkylsilane and a specific powder using an oily component together with a powder component and an oil component. By using the dry powder obtained by the above process, it was found that a powder cosmetic excellent in use feeling and long-lasting makeup was obtained, and the present invention was completed.

That is, the present invention includes a slurry preparation step in which a powder component, an oil component, and the following processing powder (A) and / or (B) are mixed in a volatile solvent to form a slurry,
A drying step of drying the slurry to obtain a dry powder, and a drying apparatus used in the drying step makes the slurry into fine droplets by mechanical shearing force due to rotation of a shearing member, and dries the fine droplets The present invention provides a method for producing a powder cosmetic, wherein the powder cosmetic is obtained from the dry powder by a drying apparatus that blows gas to dry the slurry.
(A) treated powder with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane {compound (I)} (B) 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane {compound (I)} and Treated powder with a copolymer represented by the following formula (II)

Further, in the present invention, the present invention provides a drying apparatus used in the drying step,
A hollow housing;
Shearing means for shearing the slurry by a shearing member provided in the housing to form microdroplets;
Supply means for supplying slurry to the shearing member in the housing;
Blower means for blowing dry gas into the housing, supplying the dry gas to the slurry made into fine droplets by the shearing means, and bringing it into contact with the slurry;
The present invention provides a method for producing a powder cosmetic, characterized in that it is a drying device provided with a collecting means for collecting a dry powder produced by drying the slurry.

  Furthermore, the present invention provides a method for mixing the powder component, the oil component, and the treated powder in a volatile solvent using a medium stirring mill in the slurry preparation step. The present invention provides a method for producing a powder cosmetic, characterized in that a slurry is obtained by crushing and / or crushing and / or dispersing.

  The present invention also provides a method for producing a powdered solid cosmetic, characterized in that the method further comprises a solidification step in which the dry powder is filled in a container and solidified by dry molding. It is.

  Furthermore, this invention provides the powder cosmetics characterized by the above-mentioned manufacturing method.

Moreover, this invention provides said powder cosmetics characterized by not containing a silicone oil .

  Furthermore, this invention provides said powder cosmetics characterized by mix | blending the hydroxyapatite powder or the composite powder containing a hydroxyapatite.

  Moreover, this invention provides said powder cosmetics characterized by containing a zinc oxide.

  Furthermore, this invention provides said powder cosmetics characterized by containing synthetic mica.

  According to the present invention, a dry powder is obtained in which the oil component is appropriately and uniformly coated to such an extent that the powder component does not agglomerate and does not affect the makeup of the powder component surface. Thus, it is possible to provide a powder cosmetic that is excellent in use feeling, in particular, excellent adhesion to the skin and a feeling of fit, while being excellent in makeup.

  Moreover, if the dry powder is filled into a container and solidified, a solid powder cosmetic that is extremely easy to use and excellent in use feeling and cosmetics can be obtained.

  The present invention relates to a powder cosmetic comprising a specific powder component, comprising a slurry preparation step in which various components of the powder cosmetic are mixed in a volatile solvent to form a slurry, and a drying step in which the slurry is dried to obtain a dry powder. It is a manufacturing method. The inventors of the present invention have paid particular attention to the solvent removal step in the wet manufacturing method and have conducted extensive studies on various drying processes.

  As a result, in a stirrer and vibration drier represented by a normal vacuum kneader, the powder was strongly agglomerated by stirring during drying, and crushing of a pulverizer or the like was extremely insufficient. On the other hand, although drying with a dryer of a type called a drum dryer or a spray dryer was also examined, all of them agglomerate during drying. Therefore, crushing with a dry pulverizer such as a pulverizer was essential to obtain a powder cosmetic. Furthermore, since a normal shelf dryer has extremely low drying efficiency, it is inferior in terms of mass productivity. In addition, the spray dryer has a remarkably low drying processing speed, and there has been a problem that an increase in size of the apparatus is inevitable when mass production is assumed.

  As a result of diligent research on such problems, when using a drying device that has a shearing mechanism that makes the slurry into microdroplets and can dry in the form of microdroplets, the resulting dry powder is pulverized. It was discovered that crushing with a dry pulverizer is unnecessary.

  And at the time of preparation of the slurry to be used for such drying, by using a powder component and an oil component including a treatment powder containing a specific perfluoroalkylsilane, it is slurried in a volatile solvent to the skin. It has been found that a powder cosmetic with excellent smoothness, uniform finish and spread when applied, in particular excellent adhesion to the skin and a good fit, and a very long lasting effect can be obtained.

  In addition, according to the present invention, it is possible to produce a powder cosmetic excellent in productivity and work environment as well as in these quality aspects. Furthermore, by molding the dry powder by ordinary dry molding, it has become possible to produce a solid powder cosmetic that is extremely excellent in terms of usability such as good puffing.

Preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an example of a device configuration used in the manufacturing method of the present invention. The production method of the present invention comprises a slurry preparation step in which a powder component, an oil component and a treatment powder containing a specific perfluoroalkylsilane are mixed in a volatile solvent to form a slurry, and the slurry is dried to obtain a dry powder. And obtaining a drying step.
First, in the slurry adjustment step, using the medium agitating mill 10 shown in FIG. 1, the powder component, the oil component, and the treatment powder containing perfluoroalkylsilane are mixed in a volatile solvent, and the powder component is mixed. A slurry is obtained by crushing, crushing, and dispersing (slurry preparation step). The obtained slurry is temporarily stored in the storage tank 12 and supplied to the drying device 14 (drying process) at a predetermined flow rate.

  The drying device 14 used in the present embodiment makes the slurry fine droplets by mechanical shearing force, that is, shearing force generated by rotation of shearing members (plate-like members 34a, 34b, 34c) provided in the shearing means 18. The slurry is dried by blowing a dry gas to the fine droplets. The shape of the shearing member is not particularly limited as long as it meets the purpose. For example, the shape of the shearing member may be any shape such as a blade shape or a disk shape in addition to the plate shape as described above.

  Thus, in this embodiment, since the dry powder is manufactured using the drying apparatus 14 that performs drying in a state where the slurry is made into fine droplets, the dry powder is hardly agglomerated during the drying. Obtainable. Therefore, it is possible to provide a powder cosmetic that is excellent in use feeling when applied to the skin. Moreover, since it is not necessary to crush again after drying, it is extremely excellent in productivity and work environment.

  It is also preferable to further include a step of filling the obtained dry powder into a container and solidifying by dry press molding. The obtained solid powder cosmetics are excellent not only in the feeling of use but also in the usability such as how to puff.

  As shown in FIG. 1, in the slurry preparation step, it is preferable to use a medium stirring mill 10 in order to mix essential blending components in a volatile solvent. By using a medium stirring mill, it is possible to obtain a slurry coated with an oil component on the surface of the powder component in an appropriate and uniform manner to the extent that it does not affect the cosmetic durability. Thus, it is possible to obtain a powder cosmetic that is further excellent in usability.

  In the case of producing a powder cosmetic containing a pearl pigment, first, a slurry is prepared using a powder component other than the pearl pigment in the slurry preparation step, and this slurry is dried in the drying step to remove the pearl pigment. A dry powder containing is obtained. And it is suitable to mix a pearl pigment and the dry powder which does not contain a pearl pigment, and to obtain a powder cosmetic using this mixed powder. By adopting such a manufacturing method, smoothness, fit to the skin, uniform finish, moisturization, excellence in quality, productivity and work environment are excellent, and at the same time excellent pearl feeling. Powdered cosmetics can be obtained.

  Hereinafter, further detailed description will be given for each step.

<Slurry preparation process>
Examples of a method for mixing a powder component, an oil component, and a processing powder containing a specific perfluoroalkylsilane in a volatile solvent to form a slurry include the following methods.
(A) Powder, oil, and powder containing perfluoroalkylsilane, which have been dry-mixed / pulverized in advance using a Henschel mixer (registered trademark), a pulverizer, etc., are added to a volatile solvent, and a disper mixer, a homogenizer , Mixing / dispersing using a planetary mixer, twin-screw kneader, etc.
(B) Powder, oil, and powder containing perfluoroalkylsilane are added to a volatile solvent, and after preliminary mixing with a disper mixer or the like as necessary, pulverization, pulverization, and dispersion treatment are performed with a medium stirring mill. How to do.
(C) A specific powder component having strong cohesive properties such as polymer elastic powder or fine particle powder is added to a volatile solvent, and if necessary, this is premixed with a disper mixer or the like, and then a medium stirring mill is used. Use this to crush, pulverize, and disperse to obtain a dispersion, add the dispersion and other powders and oils, and powder containing perfluoroalkylsilane, and then use a wet mixer or a medium stirring mill. How to do the processing.

  In the slurry preparation step, it is preferable to use a medium stirring mill {for example, (B) and (C) above}. The medium agitation mill is a medium in which a dispersion liquid composed of a powder component (and an oil component) and a solvent is contained in a container filled with a solid dispersion medium (medium) such as beads and the liquid in the container is agitated. The powder component is crushed, pulverized, and dispersed by impact force, frictional force, and the like.

  2 and 3 are schematic configuration diagrams showing examples of a medium stirring mill preferably used in the present invention. The medium stirring mill that can be suitably used in the present invention is not limited to these, and any medium stirring mill may be used as long as the object of the present invention can be achieved.

  The medium agitating mill 110 in the example shown in FIG. 2 is attached to a substantially cylindrical container 112, a drive shaft 114 inserted into the container 112, a drive motor 116 that rotationally drives the drive shaft 114, and the drive shaft. And a plurality of stirring disks 118a to 118f. The inside of the container 112 is divided into a dispersion chamber 120 for crushing, crushing, and dispersing powder components, and an extraction chamber 122 for extracting the treated dispersion liquid. A supply port 124 for supplying the dispersion liquid to be processed is provided on the dispersion chamber 120 side of the container 112, and an extraction port 126 for taking out the treated dispersion liquid is provided on the extraction chamber 122 side. A partition wall 130 having an opening 128 is provided between the dispersion chamber 120 and the extraction chamber 122, and a separation disk 132 attached to the drive shaft 114 is disposed in the vicinity of the partition wall 130. 128 is disposed so as to cover 128. A gap is provided between the partition wall 130 and the separation disk 132, and this gap is used as a separation slit 134 for separating the solid dispersion medium and the dispersion liquid to be treated.

The dispersion liquid containing the powder component and the solvent is sequentially supplied from the supply port 124 to the dispersion chamber 120 in the container 112, and the dispersion liquid in the dispersion chamber 120 sequentially moves toward the extraction chamber 122. At this time, the drive shaft 114 is rotationally driven by the drive motor 116, and the stirring disks 118a to 118f are rotating. The dispersion chamber 120 is filled with a large number of solid dispersion media 136, and the solid dispersion media 136 are stirred together with the dispersion by the rotation of the stirring disks 118a to 118f. The agglomerated powder component in the dispersion is pulverized, pulverized, and dispersed by the impact force or shear stress from the solid dispersion medium 136.
The pulverized, pulverized, and dispersed dispersion liquid flows through the separation slit 134 between the partition wall 130 and the separation disk 132 between the dispersion chamber 120 and the extraction chamber 122 and flows into the extraction chamber 122. , Extracted from the extraction port 126 to the outside. The separation slit 134 is sized so that the solid dispersion medium 136 does not flow out of the dispersion chamber 120 into the extraction chamber 122. Therefore, when the dispersion liquid passes through the separation slit 134, the dispersion liquid (powder component + solvent) and the solid dispersion medium 136 are separated, and only the dispersion liquid enters the extraction chamber.

  FIG. 3 is a schematic configuration diagram of an annular type medium stirring mill. The medium agitating mill 210 shown in FIG. 3 includes a container 212 having a substantially W-shaped cross section that is symmetric with respect to the central axis A, and a substantially inverted U-shaped rotor that is provided in the container 212 and is rotatable about the central axis A. 214 and a drive motor 216 that rotationally drives the rotor 214. An annular space 218 is formed between the inner surface of the container 216 and the outer surface of the rotor 214, and the annular space 218 has a shape having a substantially V-shaped cross section on both sides of the central axis A. Further, the container 212 is formed with a supply port 220 for sending the dispersion liquid (powder component + solvent) to be processed into the annular space 218 and an extraction port 222 for taking out the treated dispersion liquid from the annular space 218. Yes. The annular space 218 is filled with a solid dispersion medium 224, and the annular space 218 is used as a dispersion chamber for crushing, crushing, and dispersing the powder components in the dispersion.

The dispersion supplied from the supply port 220 is sent to the annular space 218 through the inlet slit 226. The fed dispersion liquid moves in the annular space 218 and is taken out from the extraction port 222 through the outlet slit 228. At this time, by rotating the rotor 214 around the central axis A in the annular space 218, the dispersion liquid and the solid dispersion medium 224 in the annular space 218 are agitated. Then, the agglomerated powder component in the dispersion liquid is crushed, pulverized, and dispersed by the impact force and shear stress from the solid dispersion medium 224. Thereafter, the dispersion passes through the exit slit 228 and is taken out from the extraction port 222.
The exit slit 228 has such a size that the solid dispersion medium 224 does not flow out of the annular space 218, and functions as a separation means for separating the dispersion (powder component + solvent) from the solid dispersion medium 224. In addition, the rotor 214 is provided with a return hole 230 for returning the solid dispersion medium 224 to the inlet side so that the solid dispersion medium 224 does not stay near the outlet.

  The reason for crushing, pulverizing, and dispersing the powder, oil, and powder containing perfluoroalkylsilane in a volatile solvent using a medium stirring mill is to increase the mixing and dispersion state of the powder component and the oil component. In addition, since the surface of the powder component can be coated with the oil component appropriately and uniformly to such an extent that it does not affect the makeup duration, a powder cosmetic with a good feel to use can be obtained. It is also possible to easily pulverize a highly cohesive powder and disperse it uniformly in a volatile solvent.

  Examples of the medium agitating mill include, in addition to those described above, a batch type bead mill such as a basket mill, a horizontal type / vertical type / annular type continuous type bead mill, a sand grinder mill, a ball mill, and Micros (registered trademark). ) Etc. may be mentioned as suitable, but can be used without particular limitation as long as the purpose is met. In other words, when powder components in an agglomerated state are blended, the agglomerates of these powder components are stirred and dispersed to a state close to primary particles, and the oily component is reasonably uniform to the extent that it does not affect the makeup of the powder. Any oil-based component can be used without particular limitation.

  The medium used in the medium agitating mill is preferably beads, and beads made of glass, alumina, zirconia, steel, flint stone or the like can be used, and zirconia is particularly preferable. Further, as the size of the beads, those having a diameter of about 0.5 to 10 mm are usually preferably used, but those having a diameter of about 2 mm to 5 mm are preferably used in the present invention. If the size of the bead diameter is too small, crushing of extender pigments such as mica and talc will proceed excessively, adversely affecting the feel of use, and the hardness after molding will become difficult to remove, caking etc. It becomes easy to cause. On the other hand, if the size of the beads is too large, aggregation of the powder component cannot be sufficiently solved, and uniform coating with the oil component becomes difficult.

  The processing powder containing the powder component, the oil component and the specific perfluoroalkylsilane to be mixed in the slurry preparation step will be described later. In addition, components that can be blended in the powder cosmetic other than the essential components in the slurry preparation step will be described later.

  The volatile solvent for mixing the ingredients of the powder cosmetic is not particularly limited, but purified water, cyclic silicone, ethanol, light liquid isoparaffin, lower alcohol, ethers, LPG, fluorocarbon, N-methylpyrrolidone, fluoroalcohol Volatile linear silicone, next-generation fluorocarbon, and the like. One or more of these solvents are mixed and used appropriately according to the characteristics of the ingredients used.

  The amount of the volatile solvent used in the slurry preparation process depends on the polarity, specific gravity, etc. of the volatile solvent to be used, so it cannot be specified, but it is important to ensure fluidity that can be processed by the medium stirring mill. It is.

<Drying process>
Next, with reference to FIG. 1, an example of the drying apparatus used for the drying process of embodiment by this invention is demonstrated. In addition, the drying apparatus used with the manufacturing method of this invention is not limited to the thing of FIG. 1, What is necessary is just to be provided with the shearing means which makes a slurry into a fine droplet mechanically. The drying device 14 shown in FIG. 1 is configured such that a slurry is dried by a hollow casing 16 serving as a place for drying the slurry and a rotating shearing member (plate-shaped members 34a, 34b, 34c) provided in the casing 16. Shearing means 18 for forming fine droplets, supply means 20 for supplying slurry to the shearing members (plate-like members 34a, 34b, 34c) in the casing 16, and dry gas is blown into the casing 16 to shear the means. 18 is provided with a blowing means 22 for supplying a drying gas to the slurry made into fine droplets by 18 and a collecting means 24 for collecting the dry powder generated by drying the slurry.

The casing 16 has a vertical, hollow, and substantially cylindrical shape, and has a discharge port 26 that discharges dry powder and dry gas at the top, and a blower that supplies dry gas from the blowing means 22 into the casing 16 at the bottom. A mouth 28 is provided. Further, the supply port 30 for supplying the slurry into the housing 16 is located between the discharge port 26 located at the top of the housing 16 and the blower port 28 located at the bottom.
The shearing means 18 rotates the rotary shaft 32 provided in the vertical direction from the bottom of the housing 16, shear members (plate-like members 34 a, 34 b, 34 c) provided at right angles to the rotary shaft 32, and the rotary shaft 32. And a drive unit 36. The drive unit 36 is disposed outside the housing 16 and transmits a rotational force to the shearing members (plate-like members 34a, 34b, 34c) via the rotation shaft 32. The shearing member shown in FIG. 1 is configured by three plate-like members 34a, 34b, and 34c provided at right angles to the rotation shaft 32 at intervals in the vertical direction. These shear members are located below the slurry supply port 30 and above the dry gas blowing port 28. By rotating the rotating shaft 32 by the drive unit 36 constituted by a motor or the like, the plate-like members 34a, 34b, 34c rotate in the horizontal direction around the rotating shaft 32 in the housing 16, and this mechanical shearing is performed. The slurry is made into fine droplets by force.

The supply means 20 supplies the slurry sent from the storage tank 12 into the housing 16. The slurry supplied into the housing 16 falls toward the plate-like members 34a, 34b, and 34c, and is made into fine droplets by the rotating plate-like members 34a, 34b, and 34c. Further, the dry gas sent from the blowing means 22 is blown into the housing 16 from the blower port 28. Since the dry gas is supplied toward the tangential direction of the horizontal section of the casing 16 and the plate members 34a, 34b, and 34c are rotating, the dry gas flow blown into the casing 16 swirls. It becomes a flow. When the slurry in the form of fine droplets comes into contact with this dry gas flow, the slurry is further refined and dried to form a dry powder. The dry powder is blown up to the upper part of the housing 16 together with the dry gas flow, and is discharged from the discharge port 26. The dry powder discharged out of the casing 16 from the discharge port 26 is collected by the collecting means 24.
A classifying means 38 is provided at the portion of the discharge port 26 in the housing 16. The classifying means 38 is configured as an orifice provided in the discharge port 26, and prevents large particles, lumps, undried products, and the like from entering the collecting means 24. Note that the configuration of the classification means is not limited to this, and other configurations may be used.

In this way, a dry powder with little aggregation is obtained by applying mechanical shearing force to the slurry by the shearing members (plate-like members 34a, 34b, 34c) and drying the slurry in the form of fine droplets. Can do. The reason why the dry powder has less agglomeration is that fine droplets reduce the amount of powder components present in the droplets, so that aggregation during drying is less likely to occur, and aggregation of powder components that occurs during the drying process It may be solved by a shearing force caused by a shearing member or a swirling flow.
Here, as the shearing member, a member constituted by a plate-like member rotating in the horizontal direction is shown, but in addition to this, a member constituted by a plate-like member rotating in the vertical direction (rotating shaft in the horizontal direction) is also provided. May be. Further, the shape of the shearing member is not limited to the above-described one, and examples thereof include a blade shape (such as a rod member perpendicular to the rotation axis provided with a cutter perpendicularly), a disk shape, and the like. Further, the number of shear members and the like are not particularly limited.

The above-mentioned drying apparatus is of a type called a flash dryer. For example, a spin flash dryer manufactured by APV Nordic Anhyro, a dry meister manufactured by Hosokawa Micron, a vertical stirring dryer manufactured by Tsukishima Kikai Co., Ltd. Is mentioned. The drying apparatus suitably used in the present invention is not limited to this, and any system having a shearing mechanism in the system may be used, and any of a vertical type and a horizontal type may be used.
Further, the temperature of the drying gas used for drying can be changed depending on the boiling point of the volatile solvent used. In addition, since the drying efficiency increases as the temperature of the drying gas increases, it is desirable to set the temperature to a high temperature within a range that does not adversely affect the modification of the dry powder constituents due to heat.
In addition, since an inert gas such as nitrogen gas or Ar gas is sealed in the housing 16, the explosion resistance is improved, so that the work environment is improved. In addition, the solvent can be recovered by incorporating a solvent recovery mechanism such as a condenser.

<Solidification process>
In the production method of the present invention, when producing a solid powder cosmetic, it is preferable to further include a solidification step of filling a dry powder into a container and solidifying by dry molding. As a solidification method, a conventionally known dry press molding or the like may be used. The powdered solid cosmetic obtained in this way also has good usability (puffing to puff), which is an advantage of dry molding, while exhibiting an excellent feeling of use equivalent to or better than the wet manufacturing method. . In addition, in the case of conventional wet molding including a step of filling a slurry into a container by injection filling, since it is necessary to consider the filling properties of the slurry, there are limitations on the raw materials to be used, but normal dry press molding is performed As long as there is no limitation on the raw materials used, there is an advantage.

<When blending pearl pigments>
In addition, when creating powder cosmetics to which pearl pigments typified by titanium mica and glass pearls are added, first of all, using the powder component of the part other than the pearl pigments, the slurry preparation step and the drying step are performed. A dry powder is obtained. This dry powder and the required amount of pearl pigment are mixed in a dry mixer with low shearing force, such as a Henschel mixer or Nauter mixer, to form a mixed powder, and the mixed powder is filled into a container or further dry-molded to produce a powder. Get cosmetics. The powder cosmetic obtained by this method is not only excellent in use feeling, usability and long lasting makeup, but also excellent in pearl feeling.

  The pearl pigment is not particularly limited, and those commonly used in conventional cosmetics can be used. Typical examples include, for example, mica titanium, iron oxide-coated mica titanium, low-order titanium oxide-coated mica titanium, photochromic mica titanium, talc instead of mica as a substrate, glass, synthetic fluorophlogopite, silica, oxy The thing using bismuth chloride etc. is mentioned. Furthermore, examples of the coating include low-order titanium oxide, iron oxide, alumina, silica, zirconia, zinc oxide, cobalt oxide, and aluminum in addition to titanium oxide. Further, as functional pearl pigments having excellent optical properties, the pearl pigment surface is coated with resin particles (Japanese Patent Laid-Open No. 11-92688), and the pearl pigment surface is coated with aluminum hydroxide particles (Japanese Patent Laid-Open No. 11-92688). 2002-146238), pearl pigment surface coated with zinc oxide particles (Japanese Patent Laid-Open No. 2003-261421), pearl pigment surface coated with barium sulfate particles (Japanese Patent Laid-Open No. 2003-61229), etc. Can be mentioned. Functional pearl pigments in which the surface of these pearl pigments is coated with various particles tend to be easily lost when a strong force is applied to the coated particles. However, according to the above method, since the pearl pigment is applied only when it is mixed with the dry powder, it is not necessary to mix with a very strong force, and the particles coated with the pearl pigment may be lost. Is small. Therefore, according to said manufacturing method, it can mix | blend with powder cosmetics, without impairing the function of a functional pearl pigment.

  The production method of the present invention is suitably applied to powdered or solid powder cosmetics such as foundations, eye shadows, cheek colors, body powders, perfume powders, baby powders, pressed powders, deodorant powders, white powders and the like.

Next, the components of the powder cosmetic obtained by the production method of the present invention will be described.
<Powder component>
As a powder component, if it can be used for cosmetics, it will not specifically limit. For example, talc, kaolin, sericite, muscovite, phlogopite, saucite, biotite, calcined talc, calcined sericite, calcined muscovite, calcined phlogopite, permiculite, magnesium carbonate, calcium carbonate, silicic acid Aluminum, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, zeolite, barium sulfate, calcined calcium sulfate (baked gypsum), calcium phosphate, fluorapatite, ceramic powder, metal soap (Eg, zinc myristate, calcium palmitate, aluminum stearate, etc.), boron nitride, photochromic titanium oxide (titanium dioxide obtained by sintering iron oxide), reduced zinc white, organic powder (eg, silicone elastomer powder, silicone powder) Silicone resin-coated silicone elastomer powder, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, copolymer resin powder of styrene and acrylic acid, benzoguanamine resin powder, polytetrafluoroethylene powder, cellulose Powder), inorganic white pigment (eg, titanium dioxide), inorganic red pigment (eg, iron oxide (Bengara), iron titanate, etc.), inorganic brown pigment (eg, γ-iron oxide, etc.), inorganic yellow Pigments (eg, yellow iron oxide, ocher), inorganic black pigments (eg, black iron oxide, low-order titanium oxide, etc.), inorganic purple pigments (eg, mango violet, cobalt violet, etc.), inorganic green pigments (For example, chromium oxide, chromium hydroxide, cobalt titanate, etc.), inorganic blue pigments (for example, ultramarine blue, agate ), Pearl pigments {eg, bismuth oxychloride, fish scale foil, titanium mica, iron oxide-coated mica titanium, low-order titanium oxide-coated mica titanium, mica titanium having photochromic properties, talc instead of mica as a substrate, glass, synthetic fluorine What uses phlogopite, silica, bismuth oxychloride, etc., as well as titanium oxide, low-order titanium oxide, colored titanium oxide, iron oxide, alumina, silica, zirconia, zinc oxide, cobalt oxide, aluminum, etc. Coated, functional pearl pigment, pearl pigment surface coated with resin particles (Japanese Patent Laid-Open No. 11-92688), pearl pigment surface coated with aluminum hydroxide particles (Japanese Patent Laid-Open No. 2002-146238) ), Coated with zinc oxide particles on the surface of the pearl pigment (Japanese Patent Laid-Open No. 2003-261421), and barium sulfate particles on the surface of the pearl pigment. Coated (JP 2003-61229 A, etc.)}, metal powder pigments (for example, aluminum powder, copper powder, etc.), organic pigments such as zirconium, barium or aluminum lake (for example, red 201, red 202, Organic pigments such as red 204, red 205, red 220, red 226, red 228, red 405, orange 203, orange 204, yellow 205, yellow 401 and blue 404, red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3 And blue No. 1), natural pigments (for example, chlorophyll, β-carotene and the like). In this invention, 1 type, or 2 or more types of powder components can be used among these.

  In addition, when mix | blending a pearl pigment, as above-mentioned, first, dry powder is obtained through said slurry preparation process and a drying process using powder components other than a pearl pigment. This dry powder and the required amount of pearl pigment are mixed in a dry mixer with low shearing force, such as a Henschel mixer or Nauter mixer, to obtain a mixed powder, and the mixed powder is filled into a container or further dry-molded. It is preferable to produce a powder cosmetic.

The blending amount of the powder component (the total amount of all powder components including the treated powder with perfluoroalkylsilane described later) is usually 60% by mass or more, preferably 80% by mass or more, based on the total amount of the powder cosmetic.
Moreover, it is suitable for the processing powder by perfluoroalkylsilane that it is 5-50 mass% with respect to the powder whole component from the adhesiveness to skin and the makeup lasting effect.

<Oil component>
The oil component is not particularly limited as long as it can be used for cosmetics, such as liquid fats and oils, solid fats and oils, waxes, hydrocarbons, higher fatty acids, higher alcohols, esters and silicones. One kind or a combination of two or more kinds can be used. The oily component can function as a binder for solid powder cosmetics. Specific oil components are exemplified below.

  Examples of liquid oils and fats include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, southern oil, castor oil, linseed oil , Safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, tea seed oil, kaya oil, rice bran oil, cinnagiri oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin and the like.

  Examples of the solid fat include cacao butter, palm oil, horse fat, hydrogenated palm oil, palm oil, beef tallow, sheep fat, hydrogenated beef tallow, palm kernel oil, pork fat, beef bone fat, owl kernel oil, hydrogenated oil, cattle Leg fats, moles, hydrogenated castor oil and the like.

  Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nuka wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, lanolin fatty acid isopropyl, hexyl laurate, and reduced lanolin. , Jojoballow, hard lanolin, shellac wax, POE lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, and the like.

  Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalane, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax, and the like.

  Examples of the higher fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, undecylenic acid, toluic acid, isostearic acid, linoleic acid, linolenic acid, eicosapentaenoic acid (EPA), docosahexaenoic acid ( DHA) and the like.

  Examples of higher alcohols include linear alcohols (eg, lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, cetostearyl alcohol); branched chain alcohols (eg, monostearyl glycerin ether (batyl alcohol) ), 2-decyltetradecinol, lanolin alcohol, cholesterol, phytosterol, hexyl decanol, isostearyl alcohol, octyldodecanol and the like.

  Synthetic ester oils include isopropyl myristate, cetyl octanoate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate, myristyl myristate, decyl oleate, hexyl decyl dimethyloctanoate, cetyl lactate, myristyl lactate Lanolin acetate, isocetyl stearate, isocetyl isostearate, cholesteryl 12-hydroxystearate, ethylene glycol di-2-ethylhexanoate, dipentaerythritol fatty acid ester, monoisostearate N-alkyl glycol, neopentyl glycol dicaprate, apple Acid diisostearyl, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, triisostearic acid trimethylo Propane, tetra-2-ethylhexanoate pentaerythritol, glycerol tri-2-ethylhexanoate, glycerol trioctanoate, glycerol triisopalmitate, trimethylolpropane triisostearate, cetyl 2-ethylhexanoate, 2-ethylhexyl palmi Tate, glyceryl trimyristate, glyceride tri-2-heptylundecanoate, castor oil fatty acid methyl ester, oleyl oleate, acetoglyceride, 2-heptylundecyl palmitate, diisobutyl adipate, N-lauroyl-L-glutamic acid-2 -Octyldodecyl ester, di-2-heptylundecyl adipate, ethyl laurate, di-2-ethylhexyl sebacate, 2-hexyldecyl myristate, 2-hexyldecyl palmitate, 2-hexyldecyl adipate Le, diisopropyl sebacate, 2-ethylhexyl succinate, and triethyl citrate.

  Examples of the silicone oil include linear polysiloxanes (for example, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, etc.); cyclic polysiloxanes (for example, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexyl). And silicone resins that form a three-dimensional network structure, various modified polysiloxanes (amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, fluorine-modified polysiloxane, etc.) It is done.

In the production method of the present invention, it is more preferable not to use silicone oil because the oily component used can produce a powder cosmetic that suppresses color change due to sebum unless silicone oil is used in combination. .
FIG. 4 shows the same powder components including the powder treated with perfluoroalkylsilane, dimethicone which is a silicone oil component used as an oil component, squalane which is a hydrocarbon oil component, and octyl methoxycinnamate which is an ester oil as a comparison. It is a color change when artificial sebum is dripped to the blended powder cosmetic.
It turns out that the color change of the powder cosmetics which mix | blended the silicone oil is large compared with what mix | blended the carbon-type oil component. That is, by not blending silicone oil, it is possible to suppress dullness due to sebum and to further enhance the cosmetic lasting effect.

  The compounding amount of the oil component is 0.5 to 40% by mass, preferably 2 to 30% by mass, based on the total amount of the powder cosmetic. If the amount of oil is too small, the moldability in the solidification process, smoothness, fit to the skin, uniform finish, moisturizing, and feeling of use will be insufficient. On the other hand, when there is too much oil, the feeling of use as a powder cosmetic such as stickiness may be impaired, or aggregation may occur in the drying process.

  In the slurry preparation step, the amount ratio (mass ratio) of the powder component including the treated powder with perfluoroalkylsilane and the oil component depends on the type of component used, but the powder component / oil component = 60/40. It is preferable that it is ˜99.5 / 0.5. The amount of the treatment powder containing perfluoroalkylsilane in all the components of the powder is preferably 5 to 50% by mass from the viewpoint of adhesion to the skin and a long-lasting cosmetic effect.

<Processed powder of (A) and / or (B)>
The treatment powder with perfluoroalkylsilane, which is an essential component of the present invention, is a treatment powder of the following (A) and / or (B). This treated powder is mixed with the above powder components in a volatile organic solvent in the slurry preparation step.
(A) treated powder with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane {compound (I)} (B) 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane {compound (I)} and Treated powder with a copolymer represented by the following formula (II)

  The powder used for the treatment is, for example, silicic acid, anhydrous silicic acid, magnesium silicate, talc, kaolin, mica, sericite, bentonite, aluminum oxide, calcium sulfate, barium sulfate, calcium carbonate, magnesium carbonate, boron nitride, hydroxyapatite. And metal soaps.

  The shape of the powder is preferably, for example, a plate shape, a block shape, or a scale shape. The particle size of the powder is not particularly limited, but is preferably 1 μm to 100 μm in average particle size.

  By treating the above powder with compound (I) by a conventional method, a treated powder of component (A) can be obtained. The powder surface treatment method will be described later.

  The content of the compound (I) contained in the treated powder is preferably 0.5 to 20% by mass with respect to the total amount of the treated powder. If it is less than 0.5% by mass, a sufficient water / oil repellent effect may not be obtained. On the other hand, if it exceeds 20% by mass, the water / oil repellent effect can be obtained, but the feeling in use may be deteriorated.

The treated powder is preferably treated together with the compound (I) by a copolymer represented by the following formula (II).

  The copolymer of the formula (II) is a random copolymer of 2-ethylhexyl acrylate, methyl methacrylate, butyl methacrylate and allyl methacrylate, methyl methacrylate having a terminal substituted with a Si-H group, and methacrylic acid. It can be obtained by addition by a hydrosilylation reaction with an allyl group moiety in allyl. Its molecular weight is 30,000-300,000. As the copolymer of the formula (II), commercially available products (KP series manufactured by Shin-Etsu Chemical Co., Ltd.) can be used.

  When the powder is treated with the copolymer of the compound (I) and the formula (II), the content of the copolymer of the formula (II) contained in the treated powder is 0.1 to 10 with respect to the total amount of the treated powder. Mass% is preferred. If it is less than 0.1% by mass, the effect of improving the affinity with other components added at the same time may be insufficient. On the other hand, if it exceeds 10% by mass, aggregation of the treated powder may be promoted, which is not preferable.

Furthermore, the mass ratio of the copolymer of the compound (I) and the formula (II) is preferably 1: 1 to 10: 1. When the compound (I) is less than 1: 1, a sufficient oil repellency effect may not be obtained. On the other hand, when the amount of compound (I) is more than 10: 1, as described above, the effect of improving the affinity with other components added at the same time may be insufficient, which is not preferable.
In addition, sufficient effects can be expected even if two or more kinds of treated powders having different ratios of different powders are blended within the above range. It is preferable to use a plurality of treated powders because the characteristics of each treated powder can be utilized according to the target product.

<Surface treatment method for treated powder>
The surface treatment with compound (I) or a copolymer of compound (I) and formula (II) on the core powder can be carried out according to a conventional method.
That is, compound (I), or a solution of compound (I) and a copolymer of formula (II) dissolved in an appropriate solvent, or directly in liquid form of compound (I) itself, After the contact, the surface-treated powder can be produced by heating at 100 to 150 ° C., preferably 120 to 140 ° C., for 1 to 12 hours, preferably 3 to 9 hours.
Note that the heating atmosphere can be performed in the air in a moisture-containing atmosphere or in another gas containing at least moisture contained in the air. In addition, after adjusting to an atmosphere that does not contain moisture, a method of heating while adding moisture during processing (heating), or to a small amount of moisture, aluminum (III), tin (II), tin (IV), A solution containing at least one metal salt of iron (III) or titanium (III) is used together with or in advance of the surface treatment agent {compound (I) or a copolymer of compound (I) and formula (II)}. It can also be added to.
Specific examples of the above metal salts include aluminum chloride, stannic chloride, ferric chloride (including hydrates thereof) and the like.

When the compound (I) or the copolymer of the compound (I) and the formula (II) is brought into contact with the powder in the form of a solution in an appropriate solvent, for example, alcohols, water, hexane, cyclohexane, toluene A solution containing 0.3 to 50% by weight in a solvent such as is prepared. Then, the powder is dispersed in the solution and heated to evaporate the solvent, and the compound (I) or the copolymer of the compound (I) and the formula (II) is polymerized on the surface of the powder. By doing so, a treated powder is obtained. This step can be performed using a Henschel mixer, a Laedige mixer, a kneader, a medium stirring mill (bead mill, etc.), and the like.
As an apparatus used for heating, an electric furnace, a tunnel furnace, a roller hearth kiln, a rotary kiln, or the like can be used.

  When the compound (I) or the copolymer of the compound (I) and the formula (II) is directly brought into contact with the powder without being dissolved in a solvent, a suitable mixer such as a rotating ball mill, vibration type The processed powder can be obtained by contacting the powder with a ball mill, planetary ball mill, sand mill, attritor, bag mill, poni mixer, planetary mixer, rake machine, Henschel mixer or the like.

  The amount of the treated powder (A) and / or (B) is 5 to 50% by mass, preferably 20 to 50% by mass, based on the total amount of the powder cosmetic.

<Preferred powder component>
Below, the especially preferable powder component used for this invention with the said process powder is demonstrated.

"Hydroxyapatite powder or composite powder containing hydroxyapatite"
Hydroxyapatite [Ca ₁₀ (PO ₄ ) ₆ (OH) ₂ ] is a component that constitutes the bones and teeth of living organisms, has biocompatibility, and has attracted particular attention from the viewpoint of safety. It is also said to be excellent in the effect of adsorbing sebum, and is a known ingredient of cosmetics (Japanese Patent Laid-Open Nos. 11-292524 and 2000-143443).
As the powder component of the present invention, it is also preferable to use a hydroxyapatite powder or a composite powder containing hydroxyapatite. Although the shape and average particle diameter of these powders are not limited, the shape is plate-like, and the average particle diameter is preferably about 1 to 200 μm.

  A composite powder in which hydroxyapatite having an average particle diameter of 1/5 or less of the spherical particles is combined with the surface of organic or inorganic spherical particles having an average particle diameter of 1 to 100 μm is also preferable (Japanese Patent Publication No. 6-92288). .

  The content of hydroxyapatite in the composite powder containing hydroxyapatite is preferably 0.1 to 2% by mass relative to the total amount of the composite powder. If it is less than 0.1% by mass, the effect of hydroxyapatite may be hardly expected. On the other hand, if it exceeds 20% by mass, there is a possibility that the particle size will increase due to the bonding between the hydroxyapatites to be combined, and the usability as a composite powder may be reduced, which is not preferable.

  The compounding quantity of the hydroxyapatite powder or the composite powder containing hydroxyapatite is 1 to 30% by mass, preferably 3 to 20% by mass, based on the total amount of the powder cosmetic.

"Zinc oxide"
The shape and manufacturing method of the zinc oxide powder are not particularly limited, but a powder having an average particle diameter of 0.1 μm to 100 μm is preferable.
Further, like the hydroxyapatite described above, zinc oxide powder combined with other inorganic or organic powders is also preferable. An organic surface-treated zinc oxide powder is also preferable. The organic surface treatment is not particularly limited. For example, dimethylpolysiloxane, methylhydrogenpolysiloxane, dimethylpolysiloxane / methylhydrogenpolysiloxane copolymer, 1,3,5,7-tetrahydrotetramethylcyclotetrasiloxane, branched Type silicones (manufactured by Shin-Etsu Chemical Co., Ltd .: KF-9908 (triethoxysilylethylpolydimethylsiloxyethyldimethicone) and KF-9909 (triethoxysilylethylpolydimethylsiloxyethylhexyldimethicone)), alkylalkoxysilanes Silane coupling agents such as perfluoroalkylalkoxysilanes, titanate coupling agents such as triisostearoyl isopropyl titanate, perfluoroalkyl phosphate diethanolamine salts, Fluoroalkyl phosphoric acid such as rualkyl phosphoric acid, metal soap such as aluminum stearate, amino acid such as N-lauroyl-L-lysine, fatty acid such as stearic acid, distearyldimethylammonium chloride, etc. And quaternary ammonium salts.

  Although the compounding quantity of a zinc oxide powder is not specifically limited, Usually, it is 3-50 mass% with respect to powder cosmetics whole quantity, Preferably it is 5-30 mass%.

"Synthetic Mica"
Although the kind of synthetic mica is not particularly limited, a synthetic mica represented by the general formula: X _{0.5 to 1.0} Y _{2 to 3} Z ₄ O ₁₀ F ₂ can be preferably used. Here, X is a cation with a coordination number of 12, Y is a cation with a coordination number of 6, and Z is a cation with a coordination number of 4, and each is substituted with one or more of the following ions: (X: Na ⁺ , K ⁺ , Ca ²⁺ , Ba ²⁺ , Rb ²⁺ , Sr ²⁺ , Y: Mg ²⁺ , Fe ²⁺ , Ni ²⁺ , Mn ²⁺ , Al ³⁺ , Fe ³⁺ , Li ⁺ , Z: Si ⁴⁺ , Ge ⁴⁺ , Al ³⁺ , Fe ³⁺ , B ³⁺ ). Synthetic mica is classified into non-swelling mica and swelling mica, and non-swelling mica is preferably used. Non-swelling mica is exemplified by fluorine phlogopite: (KMg ₃ (AlSi ₃ O ₁₀ ) F ₂ ), potassium tetrasilicon mica: (KMg _2.5 (Si ₄ O ₁₀ ) F ₂ ). As the swelling mica, sodium tetrasilicon mica: (NaMg _2.5 (Si ₄ O ₁₀ ) F ₂ ), sodium teniolite: (NaMg ₂ Li (Si ₄ O ₁₀ ) F ₂ ), lithium teniolite: (LiMg ₂ Li (Si ₄ O ₁₀ ) F ₂ ) is exemplified, and fluorine phlogopite is particularly preferable.
Furthermore, synthetic mica powder treated with an organic surface is also preferable. The organic surface treatment is not particularly limited. For example, dimethylpolysiloxane, methylhydrogenpolysiloxane, dimethylpolysiloxane / methylhydrogenpolysiloxane copolymer, 1,3,5,7-tetrahydrotetramethylcyclotetrasiloxane, Silicones such as branched silicones (manufactured by Shin-Etsu Chemical Co., Ltd .: KF-9908 (triethoxysilylethylpolydimethylsiloxyethyldimethicone) and KF-9909 (triethoxysilylethylpolydimethylsiloxyethylhexyldimethicone)), alkylalkoxysilanes Silane coupling agents such as perfluoroalkylalkoxysilanes, titanate coupling agents such as triisostearoyl isopropyl titanate, perfluoroalkyl phosphate diethanolamine salts, perfluoro Fluoroalkyl phosphates such as alkyl phosphates, metal soaps such as aluminum stearate, amino acids such as N-lauroyl-L-lysine, fatty acids such as stearic acid, distearyldimethylammonium chloride, etc. Such quaternary ammonium salts.

  Although the compounding quantity of synthetic mica powder is not specifically limited, Usually, it is 1-30 mass% with respect to powder cosmetics whole quantity, Preferably it is 3-20 mass%.

"Spherical powder"
It is preferable to mix arbitrary spherical powder with the powder component.
The chemical composition and shape of the spherical powder (the ratio of the major axis to the minor axis may be about 1 to 2) are not particularly limited. For example, as the spherical polymer powder, polymethylsilsesquioxane (see JP-A 63-297313 and JP-A 1-268615), nylon, polymethyl methacrylate, polyethylene, divinylbenzene / styrene copolymer, Examples include spherical powders made of materials such as polystyrene and cellulose. Tospearl 120 and Tospearl 145 (spherical polymethylsilsesquioxane powder) manufactured by Toshiba Silicone Co., Ltd., SP-500 (spherical nylon powder) manufactured by Toray Industries, Inc., KSP-100 manufactured by Shin-Etsu Chemical Co., Ltd. (silicone resin coating) Commercial products such as silicone rubber powder) can be used. Examples of the inorganic powder include anhydrous silicic acid (silica), pressure-disintegrating spherical silica obtained by soft aggregation of anhydrous silicic acid (see Japanese Patent Laid-Open No. Hei 3-97412), and starch and silk powder.

  Although the compounding quantity of spherical powder is not specifically limited, Usually, it is 1-30 mass% with respect to powder cosmetics whole quantity, Preferably it is 3-20 mass%.

<Other ingredients that can be blended>
In the production method of the present invention, within the range not impairing the effects of the present invention, in addition to the above essential components, other components usually used in cosmetics, for example, anionic surfactants, cationic surfactants, amphoteric surfactants , Nonionic surfactant, moisturizer, water-soluble polymer, thickener, film agent, UV absorber, sequestering agent, lower alcohol, polyhydric alcohol, sugar, amino acid, organic amine, polymer emulsion, pH Conditioners, skin nutrients, vitamins, antioxidants, antioxidant auxiliaries, fragrances, water, and the like can be appropriately blended as necessary, and can be produced by conventional methods according to the intended product. These components are usually mixed with the essential components in the slurry preparation step. It may be mixed with the dry powder after the drying step.

  Anionic surfactants include, for example, fatty acid soap (eg, sodium laurate, sodium palmitate, etc.); higher alkyl sulfates (eg, sodium lauryl sulfate, potassium lauryl sulfate); alkyl ether sulfates (eg, POE-lauryl sulfate triethanolamine, POE-sodium lauryl sulfate, etc.); N-acyl sarcosine acids (eg, sodium lauroyl sarcosine, etc.); higher fatty acid amide sulfonates (eg, sodium N-myristoyl-N-methyl taurate, palm Oil fatty acid methyl tauride sodium, lauryl methyl tauride sodium, etc .; phosphate ester salt (POE-oleyl ether sodium phosphate, POE-stearyl ether phosphate, etc.); sulfosuccinate (eg, di-2-ethylhexyl sulfo) Sodium succinate, monolauroyl monoethanolamide sodium polyoxyethylene sulfosuccinate, sodium lauryl polypropylene glycol sulfosuccinate, etc.); alkyl benzene sulfonates (eg, sodium linear dodecyl benzene sulfonate, triethanol amine linear dodecyl benzene sulfonate, linear dodecyl) Higher fatty acid ester sulfates (eg, hydrogenated coconut oil fatty acid sodium glycerol sulfate); N-acyl glutamate (eg, monosodium N-lauroyl glutamate, disodium N-stearoyl glutamate, N-myristoyl) -L-glutamic acid monosodium, etc.); sulfated oil (eg funnel oil); POE-alkyl ether carboxylic acid; POE-alkyl allyl ether Α-olefin sulfonates; higher fatty acid ester sulfonates; secondary alcohol sulfates; higher fatty acid alkylolamide sulfates; lauroyl monoethanolamide sodium succinate; N-palmitoyl aspartate ditriethanolamine ; Sodium caseinate and the like.

  Examples of the cationic surfactant include alkyltrimethylammonium salts (eg, stearyltrimethylammonium chloride, lauryltrimethylammonium chloride, etc.); alkylpyridinium salts (eg, cetylpyridinium chloride, etc.); distearyldimethylammonium dialkyldimethylammonium chloride; Poly (N, N'-dimethyl-3,5-methylenepiperidinium chloride); alkyl quaternary ammonium salt; alkyldimethylbenzylammonium salt; alkylisoquinolinium salt; dialkyl morpholinium salt; POE-alkylamine; Examples include alkylamine salts; polyamine fatty acid derivatives; amyl alcohol fatty acid derivatives; benzalkonium chloride; benzethonium chloride and the like.

  Examples of amphoteric surfactants include imidazoline-based amphoteric surfactants (eg, 2-undecyl-N, N, N- (hydroxyethylcarboxymethyl) -2-imidazoline sodium, 2-cocoyl-2-imidazolinium hydroxide). Side-1-carboxyethyloxy disodium salt, etc.); betaine surfactants (for example, 2-heptadecyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, lauryldimethylaminoacetic acid betaine, alkylbetaine, amide betaine) , Sulfobetaine, etc.).

  Examples of the lipophilic nonionic surfactant include sorbitan fatty acid esters (for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, Sorbitan trioleate, diglycerol sorbitan penta-2-ethylhexylate, diglycerol sorbitan tetra-2-ethylhexylate); glycerin polyglycerin fatty acids (eg mono cottonseed oil fatty acid glycerin, monoerucic acid glycerin, sesquioleate glycerin, monostearin) Glycerin acid, α, α'-oleic acid pyroglutamate glycerin, monostearic acid glycerin malic acid, etc.); propylene glycol fatty acid esters (eg monostearies) Propylene glycolate, etc.); hardened castor oil derivative; glycerin alkyl ether, etc.

  Examples of hydrophilic nonionic surfactants include POE-sorbitan fatty acid esters (for example, POE-sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate). POE sorbite fatty acid esters (eg, POE-sorbite monolaurate, POE-sorbite monooleate, POE-sorbite pentaoleate, POE-sorbite monostearate, etc.); POE-glycerin fatty acid esters (eg, POE- POE-monooleate such as glycerol monostearate, POE-glycerol monoisostearate, POE-glycerol triisostearate); POE-fatty acid esters (eg POE-distearate, POE-monodiolate, ethylene glycol distearate, etc.) POE-alkyl ethers (eg POE- Lauryl ether, POE-oleyl ether, POE-stearyl ether, POE-behenyl ether, POE-2-octyldodecyl ether, POE-cholestanol ether, etc.); Pluronic type (eg, Pluronic, etc.); POE / POP-alkyl ether (For example, POE / POP-cetyl ether, POE / POP-2-decyltetradecyl ether, POE / POP-monobutyl ether, POE / POP-hydrogenated lanolin, POE / POP-glycerin ether, etc.); Tetra POE / tetra POP-ethylenediamine condensates (eg Tetronic, etc.); POE-castor oil hardened castor oil derivatives (eg POE-castor oil, POE-hardened castor oil, POE-hardened castor oil monoisostearate, POE-hardened castor Oil triisostearate, POE-hardened castor oil monopyroglutamic acid monoisostearic acid diester, POE-hardened castor oil maleic acid, etc.) POE-beeswax lanolin derivatives (eg POE-sorbite beeswax); alkanolamides (eg coconut oil fatty acid diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide, etc.); POE-propylene glycol fatty acid ester; POE-alkylamine POE-fatty acid amide; sucrose fatty acid ester; alkyl ethoxydimethylamine oxide; trioleyl phosphate and the like.

  Examples of the humectant include polyethylene glycol, propylene glycol, glycerin, 1,3-butylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate Sodium lactate, bile salt, dl-pyrrolidone carboxylate, alkylene oxide derivative, short-chain soluble collagen, diglycerin (EO) PO adduct, Izayoi rose extract, yarrow extract, merirot extract and the like.

  Examples of natural water-soluble polymers include plant-based polymers (for example, gum arabic, gum tragacanth, galactan, guar gum, carob gum, caraya gum, carrageenan, pectin, agar, quince seed (malmello), alge colloid (guckweed extract), starch (Rice, corn, potato, wheat), glycyrrhizic acid); microbial polymers (eg, xanthan gum, dextran, succinoglucan, bullulan, etc.); animal polymers (eg, collagen, casein, albumin, gelatin, etc.), etc. Is mentioned.

  Semi-synthetic water-soluble polymers include, for example, starch polymers (eg, carboxymethyl starch, methylhydroxypropyl starch, etc.); cellulose polymers (methylcellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, sodium cellulose sulfate) Hydroxypropylcellulose, carboxymethylcellulose, sodium carboxymethylcellulose, crystalline cellulose, cellulose powder and the like); alginic acid polymers (for example, sodium alginate, propylene glycol alginate, etc.) and the like.

  Synthetic water-soluble polymers include, for example, vinyl polymers (eg, polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, carboxyvinyl polymer); polyoxyethylene polymers (eg, polyethylene glycol 20,000, 40,000, 60,000). Polyoxyethylene polyoxypropylene copolymer, etc.); acrylic polymers (for example, sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc.); polyethyleneimine; cationic polymers, and the like.

  Examples of the thickener include gum arabic, carrageenan, caraya gum, gum tragacanth, carob gum, quince seed (malmello), casein, dextrin, gelatin, sodium pectate, sodium alginate, methylcellulose, ethylcellulose, CMC, hydroxyethylcellulose, hydroxypropyl Cellulose, PVA, PVM, PVP, sodium polyacrylate, carboxyvinyl polymer, locust bean gum, guar gum, tamarind gum, cellulose dialkyldimethylammonium sulfate, xanthan gum, magnesium aluminum silicate, bentonite, hectorite, silicate A1Mg (vee gum), Examples thereof include laponite and silicic anhydride.

  Examples of UV absorbers include benzoic acid UV absorbers (eg, paraaminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester. N, N-dimethyl PABA ethyl ester, N, N-dimethyl PABA butyl ester, N, N-dimethyl PABA ethyl ester, etc.); Salicylic acid ultraviolet absorbers (for example, amyl salicylate, menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, etc.); cinnamic acid ultraviolet absorbers (for example, octylmethoxycinnamate, ethyl) -4-Isopropyl cinnamate , Methyl-2,5-diisopropylcinnamate, ethyl-2,4-diisopropylcinnamate, methyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p -Methoxycinnamate, octyl-p-methoxycinnamate (2-ethylhexyl-p-methoxycinnamate), 2-ethoxyethyl-p-methoxycinnamate, cyclohexyl-p-methoxycinnamate, ethyl-α-cyano-β -Phenyl cinnamate, 2-ethylhexyl-α-cyano-β-phenyl cinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxy cinnamate, etc.); benzophenone UV absorbers (for example, 2,4-dihydroxybenzophenone) 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophen Non, 2,2 ', 4,4'-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4'-methylbenzophenone, 2-hydroxy-4-methoxybenzophenone-5- Sulfonate, 4-phenylbenzophenone, 2-ethylhexyl-4′-phenyl-benzophenone-2-carboxylate, 2-hydroxy-4-n-octoxybenzophenone, 4-hydroxy-3-carboxybenzophenone, etc.); 3- (4'-methylbenzylidene) -d, l-camphor, 3-benzylidene-d, l-camphor; 2-phenyl-5-methylbenzoxazole; 2,2'-hydroxy-5-methylphenylbenzotriazole; 2 -(2'-hydroxy-5'-t-octylphenyl) benzotriazole; 2- (2'-hydroxy-5'-methylphenylbenzotriazole; dibenzalazine; dianisoylmethane; 4-methoxy-4'-t-butyldibenzo Nzoylmethane; 5- (3,3-dimethyl-2-norbornylidene) -3-pentan-2-one, dimorpholinopyridazino; 2-ethylhexyl-2-cyano-3,3-diphenyl acrylate; 2,4-bis -{[4- (2-ethylhexyloxy) -2-hydroxy] -phenyl} -6- (4-methoxyphenyl)-(1,3,5) -triazine and the like.

  Examples of the sequestering agent include 1-hydroxyethane-1,1-diphosphonic acid, 1-hydroxyethane-1,1-diphosphonic acid tetrasodium salt, disodium edetate, trisodium edetate, and tetrasodium edetate. Sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, phosphoric acid, citric acid, ascorbic acid, succinic acid, edetic acid, trisodium ethylenediaminehydroxyethyl triacetate and the like.

  Examples of the lower alcohol include ethanol, propanol, isopropanol, isobutyl alcohol, t-butyl alcohol and the like.

  Examples of the polyhydric alcohol include divalent alcohols (for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, tetramethylene glycol, 2,3-butylene glycol, Pentamethylene glycol, 2-butene-1,4-diol, hexylene glycol, octylene glycol, etc.); trivalent alcohol (eg, glycerin, trimethylolpropane, etc.); tetravalent alcohol (eg, 1,2,6) Pentaerythritol such as hexanetriol); pentahydric alcohol (eg, xylitol, etc.); hexavalent alcohol (eg, sorbitol, mannitol, etc.); polyhydric alcohol polymer (eg, diethylene glycol, dipropylene glycol, triethylene glycol, polypropylene Glycol, tetraethylene glycol, diglycerin, polyethylene glycol, triglycerin, tetraglycerin, polyglycerin, etc.); divalent alcohol alkyl ethers (for example, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene) Glycol monophenyl ether, ethylene glycol monohexyl ether, ethylene glycol mono 2-methylhexyl ether, ethylene glycol isoamyl ether, ethylene glycol benzyl ether, ethylene glycol isopropyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, ethylene glycol dibutyl ether, etc.) ; Dihydric alcohol alkyl ester Tellurium (for example, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, diethylene glycol butyl ether, diethylene glycol methyl ethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether , Propylene glycol monoethyl ether, propylene glycol monobutyl ether, propylene glycol isopropyl ether, dipropylene glycol methyl ether, dipropylene glycol ethyl ether, dipropylene glycol butyl ether, etc.); divalent alcohol Ether esters (eg, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monophenyl ether acetate, ethylene glycol diazinate, ethylene glycol disuccinate, diethylene glycol monoethyl ether acetate, diethylene glycol) Monobutyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monopropyl ether acetate, propylene glycol monophenyl ether acetate, etc .; glycerin monoalkyl ether (for example, xyl alcohol, ceralkyl alcohol) Sugar alcohol (for example, sorbitol, maltitol, maltotriose, mannitol, sucrose, erythritol, glucose, fructose, amylolytic sugar, maltose, xylitolose, amylolytic sugar reducing alcohol, etc.); Solid; Tetrahydrofurfuryl alcohol; POE-Tetrahydrofurfuryl alcohol; POP-Butyl ether; POP / POE-Butyl ether; Tripolyoxypropylene glycerin ether; POP-glycerin ether; POP-glycerin ether phosphate; POP / POE-pentane erythritol Examples include ether and polyglycerin.

  Monosaccharides include, for example, tricarbon sugars (eg, D-glyceryl aldehyde, dihydroxyacetone, etc.); tetracarbon sugars (eg, D-erythrose, D-erythrulose, D-treose, erythritol, etc.); pentose sugars (eg, , L-arabinose, D-xylose, L-lyxose, D-arabinose, D-ribose, D-ribulose, D-xylulose, L-xylulose, etc .; hexose (eg, D-glucose, D-talose, D) -Bucicose, D-galactose, D-fructose, L-galactose, L-mannose, D-tagatose, etc.); pentose sugar (eg, aldheptose, heproose, etc.); octose sugar (eg, octulose, etc.); For example, 2-deoxy-D-ribose, 6-deoxy-L-galactose, 6-deoxy-L-mannose, etc .; amino sugar (eg, D-glucosamine, D-galactosamine, shea Acid, Aminouron acid, muramic acid); uronic acid (e.g., D- glucuronic acid, D- mannuronic acid, L- guluronic acid, D- galacturonic acid, L- iduronic acid) and the like.

  Examples of the oligosaccharides include sucrose, gnocyanose, umbelliferose, lactose, planteose, isoliquinoses, α, α-trehalose, raffinose, lycnose, umbilicin, stachyose verbus courses and the like.

  Examples of the polysaccharide include cellulose, quince seed, chondroitin sulfate, starch, galactan, dermatan sulfate, glycogen, gum arabic, heparan sulfate, hyaluronic acid, tragacanth gum, keratan sulfate, chondroitin, xanthan gum, mucoitin sulfate, guar gum, dextran, kerato sulfate. , Locust bean gum, succinoglucan, caronic acid and the like.

  Examples of amino acids include neutral amino acids (eg, threonine, cysteine, etc.); basic amino acids (eg, hydroxylysine, etc.) and the like. Examples of amino acid derivatives include acyl sarcosine sodium (lauroyl sarcosine sodium), acyl glutamate, acyl β-alanine sodium, glutathione, and pyrrolidone carboxylic acid.

Examples of the organic amine include monoethanolamine, diethanolamine, triethanolamine, morpholine, triisopropanolamine, 2-amino-2-methyl-1,3-propanediol, and 2-amino-2-methyl-1-propanol. Is mentioned.
Examples of the polymer emulsion include an acrylic resin emulsion, a polyethyl acrylate emulsion, an acrylic resin liquid, a polyacryl alkyl ester emulsion, a polyvinyl acetate resin emulsion, and a natural rubber latex.

Examples of the pH adjuster include buffers such as lactic acid-sodium lactate, citric acid-sodium citrate, and succinic acid-sodium succinate.
Examples of vitamins include vitamins A, B1, B2, B6, C, E and derivatives thereof, pantothenic acid and derivatives thereof, biotin and the like.
Examples of the antioxidant include tocopherols, dibutylhydroxytoluene, butylhydroxyanisole, gallic acid esters and the like.

  Examples of the antioxidant assistant include phosphoric acid, citric acid, ascorbic acid, maleic acid, malonic acid, succinic acid, fumaric acid, kephalin, hexametaphosphate, phytic acid, and ethylenediaminetetraacetic acid.

  Examples of other components that can be blended include antiseptics (ethyl paraben, butyl paraben, etc.); anti-inflammatory agents (eg, glycyrrhizic acid derivatives, glycyrrhetinic acid derivatives, salicylic acid derivatives, hinokitiol, zinc oxide, allantoin, etc.); Extract, placenta extract, saxifrage extract, arbutin, etc.); various extracts (eg, buckwheat, auren, shikon, peonies, assembly, birch, sage, loquat, carrot, aloe, mallow), iris, grape, yokuinin, loofah, lily , Saffron, nematode, ginger, hypericum, onionis, garlic, capsicum, chimney, red snapper, seaweed, etc.), activator (eg, royal jelly, photosensitizer, cholesterol derivative, etc.); blood circulation promoter (eg, nonyl acid wallenylamide, nicotine) Acid Gyl ester, nicotinic acid β-butoxyethyl ester, capsaicin, gingerone, cantalis tincture, ictamol, tannic acid, α-borneol, tocopherol nicotinate, inositol hexanicotinate, cyclandrate, cinnarizine, trazoline, acetylcholine, verapamil, cephalanthin , Γ-oryzanol, etc.); antiseborrheic agents (eg, sulfur, thianthol, etc.); anti-inflammatory agents (eg, tranexamic acid, thiotaurine, hypotaurine, etc.) and the like.

  Furthermore, edetate disodium, edetate trisodium, sodium citrate, sodium polyphosphate, sodium metaphosphate, gluconic acid, malic acid and other metal sequestering agents, caffeine, tannin, verapamil, tranexamic acid and its derivatives, licorice, Various herbal extracts such as Karin and Ichiyakusou, drugs such as tocopherol acetate, glycyrrhizic acid, glycyrrhizic acid and derivatives or salts thereof, whitening agents such as vitamin C, magnesium ascorbate phosphate, glucoside ascorbate, arbutin, kojic acid, Amino acids such as arginine and lysine and derivatives thereof, saccharides such as fructose, mannose, erythritol, trehalose and xylitol can also be appropriately blended.

  EXAMPLES Hereinafter, although an Example is given and this invention is further demonstrated, this invention is not limited to this. Unless otherwise specified, the amount is shown in mass%.

  Use feeling of powder cosmetics (smoothness, uniform finish, moisture feeling, adhesion to skin, fit to skin, good stretch), usability (puff-off), long-lasting makeup effect ( The evaluation method for color dullness and dustiness is as follows.

<Evaluation method>
A sensory test was conducted on each evaluation item by using 10 cosmetic panelists actually using cosmetics. Evaluation results were evaluated according to the following four levels.
◎: Eight or more out of 10 judged good ○: Six to seven out of ten judged good △: Four to five out of 10 judged good ×: Three or less out of 10 were good Judgment

With the composition shown in Table 1 below, the production method was changed as described below, and solid powder cosmetics (foundations) were produced by the production methods of Example 1 and Comparative Examples a to c, and evaluated. The evaluation results are shown in Table 2.

[Example 1]
Ingredients 1 to 19 are mixed in ethyl alcohol (50% by mass as out-parts) using a disper mixer, and pulverized, pulverized and dispersed using a medium stirring mill (sand grinder mill, using 2 mmφ zirconia beads). Thus, a slurry was obtained. Next, the slurry was dried by blowing dry gas while making the slurry fine droplets by mechanical shearing force using a spin flash dryer (manufactured by APV Nordic Anhyro). The obtained dry powder was filled into an intermediate dish, and dry press molding was performed by a known method to obtain a powder solid cosmetic.

[Comparative Example a]
The components 1 to 19 were mixed in a dry manner with a Henschel mixer and then pulverized twice with a pulverizer. The obtained powder was filled into an intermediate dish and dry press molded by a known method to obtain a powdered solid cosmetic.

[Comparative Example b]
Ingredients 1 to 19 are mixed in ethyl alcohol (50% by mass as out-parts) using a disper mixer, and pulverized, pulverized and dispersed using a medium stirring mill (sand grinder mill, using 2 mmφ zirconia beads). Thus, a slurry was obtained. This slurry was filled into an intermediate dish, and ethyl alcohol was removed by vacuum suction to obtain a powdered solid cosmetic.

[Comparative Example c]
Ingredients 1 to 19 are mixed in ethyl alcohol (50% by mass as out-parts) using a disper mixer, and pulverized, pulverized and dispersed using a medium stirring mill (sand grinder mill, using 2 mmφ zirconia beads). Thus, a slurry was obtained. Next, the slurry was dried using a stirring and drying device (vacuum kneader), and then pulverized twice with a pulverizer. The obtained dry powder was filled into an intermediate dish, and dry press molding was performed by a known method to obtain a powder solid cosmetic.

Example 1 is a case where the slurry wet-mixed with a medium stirring mill is made into a dry powder with a fine droplet drying apparatus (spin flash dryer) and dry-pressed.
In Comparative Example a, when the mixture dry-mixed with a Henschel mixer is further crushed and dry-pressed,
When Comparative Example b is wet-molded (vacuum suction) without drying the slurry wet-mixed in the medium stirring mill,
Comparative Example c is an ordinary stirring / drying device (vacuum kneader: a device that dries while stirring so as not to form a drying gradient of the slurry, but fine droplets due to mechanical shearing force. This is a case where a dry powder is obtained by dry pressing.

As shown in Table 2, when the slurry wet-mixed using a medium agitating mill was dried into fine droplets and dry-molded (Example 1), the exfoliation and puffing were good and smooth, Moisture, uniform finish, moist and fit to skin were very high. Furthermore, the adhesion to the skin, which was a conventional problem, was very high.
This is because by preparing a slurry with a medium agitating mill, the surface of the powder component is coated with the oil component appropriately and uniformly so as not to affect the cosmetic durability, and this state is maintained even after the dry powder is formed. It is thought that this is because.
Due to this adhesion, it was confirmed that the powder cosmetics were excellent in makeup-holding effect with little color change over time and little color change.

On the other hand, when it manufactured using the powder obtained by the conventional dry-mixing (comparative example a), evaluation of a feeling of use was very low. This is considered to be because the oil component cannot be uniformly coated on the surface of the powder component by dry mixing. Since the oil was not uniformly coated, the color change with time was small, but because of its low adhesion, it was liable to cause dusting.
In addition, in the case where the same slurry as in Example 1 was wet-molded without being dried (Comparative Example b), the cosmetic material was too hard and solidified, and the puff was poorly stretched and spread. The reputation of having a makeup was also low.
Furthermore, in the case of using a powder obtained by drying the same slurry as in Example 1 with a vacuum kneader (Comparative Example c), the powder is strongly agglomerated during drying, and the residue remains even after crushing with a pulverizer, There was also a rough feeling in use, and a uniform finish could not be obtained. Due to this, the effect of long-lasting makeup was low. The evaluation of the feeling of use is low, and this is considered to be due to the fact that the state of the oil coated on the powder component surface becomes non-uniform due to the crushing process by the pulverizer after drying.

According to the study by the present inventors, even when the slurry is dried with a spray dryer or a drum dryer, as in the case of using a vacuum kneader, strong agglomeration is observed at the time of drying, and for use in powder cosmetics. Needed to be crushed.
On the other hand, when dried with a dry meister, as in the case of using a spin flash dryer, agglomeration during drying hardly occurred and crushing was unnecessary.
Therefore, in this invention, it is suitable to dry with a dry gas, making a slurry fine droplet in a drying process.
In consideration of the drying efficiency per installed volume, the spin flash dryer and the dry meister used in the present invention are more efficient than other dryers and are excellent in productivity. That is, the production method of the present invention is excellent in productivity and work environment.

"Example 2"
The production method was fixed to a method of obtaining a dry powder by a fine droplet drying apparatus (spin flash dryer), and the treatment of the extender pigment was changed to produce a powder solid cosmetic with the composition shown in Table 3. Table 4 shows the evaluation of use feeling.

As shown in Table 4, usability, particularly adhesion to the skin, was confirmed in all cases, and the superiority of the production method of the present invention could be confirmed.
On the other hand, with respect to the makeup lasting effect, in the case of octyltriethoxysilane treatment (Comparative Example d), the color dullness is large and dusting is likely to occur. In Comparative Example d, the oil component is firmly coated uniformly on the surface of the powder component. On the other hand, both Example 1 and Example 2 prepared with the treatment powder containing perfluoroalkylsilane had a very high makeup-holding effect.

  Hereinafter, the example of the powder cosmetics by the manufacturing method of this invention is shown further.

"Example 3 white powder"
White powder was prepared by the formulation and manufacturing method shown in Table 5 below. The obtained white powder was very excellent in use feeling and usability.

(Production method)
Components 1 to 16 were mixed in ethyl alcohol using a disper mixer, and mixed / dispersed using a twin-screw kneader to obtain a slurry. Next, the slurry was dried by blowing dry gas with a dry meister while making the slurry into fine droplets by mechanical shearing force to obtain white powder.

"Examples 4 to 6"
Next, in powder cosmetics (foundations) having the composition shown in Table 6 below, the powder components including the treated powder with perfluoroalkylsilane were made the same, and dimethicone (Example 4), which is a silicone-based oil component, was used as the oil component. As a comparison with Example 4, a powder cosmetic containing a squalane (Example 5) which is a hydrocarbon oil and an octylmethoxycinnamate (Example 6) which is an ester oil was produced. The color change when artificial sebum was dropped onto this powder cosmetic was examined.
(Production method)
The production method was fixed to a method of obtaining a dry powder with a fine droplet drying apparatus (spin flash dryer), and the type of oil was changed to produce a powder solid cosmetic with the composition shown in Table 6.
(Measurement method of color change)
Artificial sebum artificially prepared to resemble the composition of the sebum component was dropped into a certain amount of the obtained powder cosmetic and stirred and mixed for 10 seconds with a Henschel mixer. The color of the obtained mixed powder was measured with a colorimeter (CM2600d, manufactured by Minolta) to determine the color change (color difference) from the powder before mixing.

  The results are shown in FIG. It can be seen that the color change (color difference) of the powder cosmetic containing the silicone oil (Example 4) is larger than when the carbon-based oil is added (Examples 5 and 6). That is, in the production method of the present invention, by not adding silicone oil as an oil component, it is possible to further suppress dullness due to sebum and to further enhance the makeup-holding effect.

It is a schematic block diagram of the apparatus used by embodiment of this invention. It is the figure which showed an example of the medium stirring mill. It is the figure which showed an example of the medium stirring mill It is a graph which shows the comparison of the color change of the powder cosmetics by artificial sebum addition at the time of changing the kind of oil-based component.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Medium stirring mill 12 Storage tank 14 Drying device 16 Housing | casing 18 Shearing means 20 Supply means 22 Blowing means 24 Collection means

Claims (9)

A slurry preparation step in which a powder component, an oil component, and a processing powder of the following (A) and / or (B) are mixed in a volatile solvent to form a slurry;
A drying step of drying the slurry to obtain a dry powder, and a drying apparatus used in the drying step makes the slurry into fine droplets by mechanical shearing force due to rotation of a shearing member, and dries the fine droplets A method for producing a powder cosmetic, wherein the powder cosmetic is obtained from the dry powder by a drying device for drying the slurry by blowing gas. (A) treated powder with 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane {compound (I)} (B) 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane {compound (I)} and Treated powder with a copolymer represented by the following formula (II)

In the manufacturing method of Claim 1, the drying apparatus used at the said drying process is
A hollow housing;
Shearing means for shearing the slurry by a shearing member provided in the housing to form microdroplets;
Supply means for supplying slurry to the shearing member in the housing;
Blower means for blowing dry gas into the housing, supplying the dry gas to the slurry made into fine droplets by the shearing means, and bringing it into contact with the slurry;
2. The method for producing a powder cosmetic according to claim 1, wherein the drying apparatus comprises a collecting means for collecting a dry powder produced by drying the slurry.   3. The manufacturing method according to claim 1, wherein in the slurry preparation step, the powder component, the oil component, and the treated powder are mixed in a volatile solvent using a medium stirring mill, and the powder component is crushed. And / or pulverizing and / or dispersing to obtain a slurry.   The method for producing a powder solid cosmetic according to any one of claims 1 to 3, further comprising a solidification step of filling the dry powder in a container and solidifying by dry molding. .   A powder cosmetic obtained by the production method according to any one of claims 1 to 4. 6. The powder cosmetic according to claim 5, which does not contain silicone oil .   The powder cosmetic according to claim 5 or 6, wherein hydroxyapatite powder or composite powder containing hydroxyapatite is blended.   The powder cosmetic according to any one of claims 5 to 7, comprising zinc oxide.   Synthetic mica is contained, The powder cosmetics of any one of Claims 5-8 characterized by the above-mentioned.

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