JP2010077114A - Method of manufacturing water-in-oil type emulsion cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a water-in-oil type emulsion cosmetic material in which lightness of appearance color is high, an emulsion particle size is fine and creamy, and feeling of usage is good, and which is excellent in preservation stability. <P>SOLUTION: The method of manufacturing the water-in-oil type emulsion cosmetic material includes a process in which an aqueous component is added into an oily component under heating, and a fluid obtained by carrying out emulsion dispersion is cooled. The method of manufacturing a water-in-oil type emulsion cosmetic material uses an oscillating type churning blender apparatus 40 which includes a churning object 44 consisting of a driving shaft 42 and an agitation blade 43 attached in the driving shaft 42 in a tubular casing 41 and in which the driving shaft 42 is made to vibrate in the shaft direction, and continuously cools the fluid by passing it in the oscillating type churning blender apparatus 40. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing a water-in-oil emulsified cosmetic comprising an aqueous component added to an oily component such as wax.

  Cosmetics are generally used to beautify the appearance of a human body. In particular, cosmetics such as foundations are used for the purpose of covering skin defects such as spots, freckles, uneven color, and pores with powder, etc. to make the skin look beautiful. Among them, the water-in-oil emulsified foundation is known to have a high covering power, good skin familiarity, and easy to obtain water repellency, water resistance and sweat resistance.

  In recent years, in order to further improve makeup sustainability, the blending amount of oily components such as wax tends to increase. When blending oily components such as wax, it is necessary to blend under heating. For example, Patent Document 1 describes a technique in which an aqueous component is added to an oily component that has been melted by heating to emulsify, and then cooled with stirring with a propeller and then stirred using a homomixer.

  However, the technique described in Patent Document 1 is insufficient as the performance required for the production of higher quality cosmetics in the process of cooling the fluid obtained by emulsification and dispersion under heating while stirring with a propeller. there were.

  Patent Document 2 describes a technique relating to a vibration type stirring and mixing apparatus used in the production of an emulsion dispersed. The vibration type stirring and mixing apparatus described in Patent Document 2 describes that a heat exchange pipe is provided inside a casing, and the emulsion can be uniformly cooled by passing through the casing.

  However, Patent Document 2 only describes a general emulsion and does not describe any specific method for producing a water-in-oil emulsified cosmetic.

JP 2007-176825 A JP 2002-139296 A

  Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a method for producing a water-in-oil emulsified cosmetic having a high appearance color brightness, a fine emulsion particle size, a good creamy feeling, and excellent storage stability. It is to provide.

  The present invention is a method for producing a water-in-oil emulsified cosmetic comprising a step of cooling a fluid obtained by adding an aqueous component to an oily component under heating and emulsifying and dispersing the oily component. The vibratory stirring and mixing apparatus includes a stirring member including a driving shaft and a stirring blade attached to the driving shaft, and the driving shaft is configured to vibrate in the axial direction. The present invention provides a method for producing a water-in-oil emulsified cosmetic that continuously cools the fluid by passing through the inside.

  The present invention also relates to a method for producing a water-in-oil emulsified cosmetic comprising a step of adding an aqueous component to an oily component under heating, emulsifying and dispersing, and cooling a fluid obtained thereby. In the casing, the water-based stirrer / mixer comprising a stirrer composed of a drive shaft and a stirring blade attached to the drive shaft, the drive shaft being configured to vibrate in the axial direction, Ingredients and heated oily component are supplied to the vibration type agitation and mixing device and passed through the vibration type stirring and mixing device while being emulsified and dispersed, and the fluid obtained by emulsifying and dispersing is continuously cooled. A method for producing a water-in-oil emulsified cosmetic is provided.

  According to the production method of the present invention, even when an aqueous component is added to an oil component under heating and the fluid obtained by emulsifying and dispersing is continuously cooled, coalescence of emulsified droplets is suppressed during the cooling step. Thus, it is possible to produce a water-in-oil emulsified cosmetic with high appearance color brightness, fine emulsified particle size and a creamy feeling of use, and excellent storage stability.

It is the schematic which shows the suitable apparatus which enforces the manufacturing method of 1st Embodiment of this invention. It is a schematic diagram of the longitudinal cross-section of the vibration type stirring and mixing apparatus shown in FIG. It is a principal part enlarged view of the stirring body in the vibration type stirring mixing apparatus shown in FIG. It is the schematic which shows another suitable apparatus which enforces the manufacturing method of 1st Embodiment of this invention. It is the schematic which shows the suitable apparatus which enforces the manufacturing method of 2nd Embodiment of this invention. It is the schematic which shows another suitable apparatus which enforces the manufacturing method of 1st Embodiment or 2nd Embodiment of this invention. It is the figure which showed the relationship between the total amount of vibrations and emulsification particle size in the cream foundation obtained by 4 of Examples 1-4 and the comparative example 1. FIG. It is the figure which showed the relationship between the total vibration amount and viscosity in the cream foundation obtained by 4 of Examples 1-4 and the comparative example 1. FIG. It is the figure which showed the relationship between the total vibration amount and the brightness in the cream foundation obtained by 4 of Examples 1-4 and the comparative example 1. FIG. (A) is an optical microscope image of an emulsified droplet when the cream foundation obtained in Example 3 is cooled to 25 ° C., and (b) is a cooling of the cream foundation obtained in Comparative Example 1 to 25 ° C. It is an optical microscope image of the emulsified droplet at the time. (A) is the optical microscope image of the emulsified droplets after the cream foundation obtained in Example 3 is stored at room temperature for 1 month, and (b) is the cream foundation obtained in Comparative Example 1 at room temperature. It is an optical microscope image of the emulsified droplet after storage for one month.

  The present invention will be described below based on preferred embodiments with reference to the drawings. FIG. 1 shows a schematic view of an apparatus suitably used in the first embodiment of the present invention. The apparatus 10 shown in FIG. 1 is roughly divided into a heating and mixing unit 20 and a cooling unit 30. The heat mixing unit 20 is filled with all or a part of the target cosmetic raw material, and is used for mixing the filled raw material under heating. The cooling unit 30 is used for cooling the heat-mixed mixture to obtain a target cosmetic.

  The heating and mixing unit 20 includes a high-speed shear mixing device 21. The high speed shear mixer 21 includes a mixing tank 22. The mixing tank 22 is heated by the jacket 23 and adjusted to a predetermined temperature. A plurality of stirring blades 24 are installed in the mixing tank 22. The plurality of stirring blades 24 are intermittently arranged in the vertical direction of the shaft 25. The stirring blade 24 is connected to a motor 26 installed outside the mixing tank 22 via a shaft 25 and is rotatable. A pipe 27 for taking out the fluid mixed in the tank 22 is connected to the bottom of the mixing tank 22. The pipe 27 is connected through a valve to a metering pump 28 such as a MONO pump (trade name, manufactured by Hyojin Equipment Co., Ltd.). The metering pump 28 is used for metering the fluid into the cooling unit 30 through the pipe 29.

  Examples of the high-speed shear mixing device 21 having the above-described configuration include TK combimix (trade name) manufactured by PRIMIX Co., Ltd., TK ADD homomixer (trade name) manufactured by PRIMIX CO., LTD. These stirring devices are mainly used alone, but in some cases, two or more kinds may be used in combination as appropriate (see FIG. 4).

  The cooling unit 30 includes a vibration type stirring and mixing device 40. The vibration type stirring and mixing device 40 has a substantially cylindrical structure, and has an inlet 31 connected to the pipe 29 on one end side and a discharge port 32 on the other end side. The discharge port 32 is connected to a discharge pipe 33. The fluid supplied from the heating and mixing unit 20 is supplied into the vibrating stirring and mixing device 40 through the inlet 31, passes through the device 40, and is discharged from the end of the discharge pipe 33 through the discharge port 32. . The fluid is further mixed and continuously cooled while passing through the vibrating stirring and mixing device 40. In order to perform continuous cooling, the vibration type stirring and mixing device preferably includes a cooling jacket in which cooling water circulates, and the vibration type stirring and mixing device 40 has an inlet 31 side to an outlet 32 side. Four jackets 34, 35, 36, and 37 are attached in this order. Cooling water circulates in each jacket. The temperature of the cooling water can be appropriately set, and these jackets can cool the fluid continuously or stepwise from the inlet 31 side toward the outlet 32 side.

  FIG. 2 shows a schematic diagram of a longitudinal section of the vibration type stirring and mixing apparatus 40. The apparatus 40 includes a stirring body 44 including a drive shaft 42 and a stirring blade 43 attached to the drive shaft 42 in a tubular casing 41. The drive shaft 42 is connected to a vibrator 45a and is vibrated up and down along the axial direction by the vibrator 45a.

  The casing 41 has a tubular shape with a circular cross section, and an inflow port 31 is provided in the vicinity of the lower portion thereof. A discharge port 32 is provided near the upper portion of the casing 41. The mixture flowing in from the inflow port 31 passes through the casing 41 and is discharged from the discharge port 32.

  In the casing 41, the above-described stirring body 44 is disposed. The drive shaft 42 of the stirring body 44 extends in the longitudinal direction (vertical direction) of the casing 41. The upper end of the drive shaft 42 is connected to the vibrator 45a through a joint 45b. The vibrator 45a includes a motor (not shown) and a known cam mechanism (not shown) connected to its output shaft. The cam mechanism includes a rotating part (not shown) and a swinging part (not shown). The rotating part is attached eccentrically with respect to the output shaft of the motor. The oscillating part is oscillated by the eccentric rotation of the rotating part. Then, the swing of the swing portion is transmitted to the drive shaft 42 as vertical vibration.

  A plurality of annular partition portions 46 are provided on the inner wall of the casing 41. All of the partition portions 46 have the same shape and protrude in the horizontal direction from the inner wall of the casing 41. The drive shaft 42 is inserted into a circular hole formed in the center of the partition 46. The diameter of this circular hole is larger than the diameter of the drive shaft 42. A plurality of mixing chambers 47 are defined in the casing 41 by two adjacent partitions. The mixing chamber 47 is arranged in series along the longitudinal direction (vertical direction) of the casing 41.

  3A and 3B are enlarged views of the main part of the stirring body 44. FIG. The stirrer 44 includes a drive shaft 42 and a stirring blade 43 spirally attached to the peripheral surface thereof. In the figure, the stirring blades 43 are attached in a spiral shape with three rounds. The stirring bodies 44 in this state are provided as a set, and the stirring bodies 44 are arranged in the mixing chambers 47 in the casing. Therefore, the number of sets of stirring bodies 44 is the same as the number of mixing chambers 47. In each set of stirring bodies 44, the spiral directions of the stirring blades 43 are the same.

  One or more apertures 48 and / or one or more notches 49 are provided in the stirring blades 43 in each set of stirring bodies 44. The opening 48 and the notch 49 are provided so that the formation positions do not coincide between the upper and lower stirring blades when the stirring body 44 is viewed from the axial direction of the drive shaft 42 (see FIG. 3A). ing. The reason for this is to prevent the occurrence of a short circuit flow in the axial direction and enhance the stirring and mixing effect.

  As the vibration type stirring and mixing apparatus 40 having the above-described configuration, for example, the one described in JP-A-4-235729 can be used. A commercially available product can also be used as the vibration type stirring and mixing device 40. As such a commercial item, the apparatus provided with the cooling jacket in the Vibro mixer (trademark) made from a refrigeration industry, for example is mentioned.

  The method for producing a water-in-oil emulsified cosmetic using the apparatus 10 having the above configuration will be described. First, all or a part of the target cosmetic raw material blended in the mixing tank 22 of the high-speed shear mixing apparatus 21. Fill. When a part of the cosmetic raw material is filled, the remainder of the raw material can be supplied from the middle of the vibratory stirring and mixing device 40 as described later.

  When two or more types of high-speed shear mixing devices 21 are provided (see FIG. 4), the high-speed shear mixing device 21 on the upstream side may be filled with all of the cosmetic ingredients, or each high-speed shear mixing device 21 may be filled. In addition, the blended raw materials for cosmetics may be partially filled. For example, the mixing conditions and the like of each component of the blended raw material can be adjusted appropriately and individually by filling each part.

  The first compounding raw material filled in the mixing tank 22 preferably contains an oily component that is solid at 25 ° C. It is preferable that one or more oily components are contained in the first compounding raw material. In the case of filling all of the blended raw materials, when the mixing tank 22 is filled with the first blended raw material containing one or more kinds of oily components, the mixing tank 22 is heated by the jacket 23 and is put into the first blended raw material. The contained oily component is brought into a molten state. The heating temperature can be appropriately set according to the melting point of the oil component. Generally, it is preferable to set the temperature higher by about 10 ° C. than the melting point of the oily component having the highest melting point. Under a state where the oily component is melt-mixed by heating, the second blending raw material containing the aqueous component is added, and the stirring blade 24 is rotated under this state to stir and sufficiently emulsify all the blended raw materials. What was obtained by dispersing is a fluid. The obtained fluid is a water-in-oil (W / O type) emulsion.

  Instead of mixing the first blended raw material and the second blended raw material in the mixing tank 22, the first blended raw material and the second blended raw material are heated in advance using a disper, a homomixer, or the like. The mixture may be mixed and emulsified to form a fluid, and the fluid may be introduced into the mixing tank 22.

When all the blended raw materials are sufficiently emulsified and dispersed, the valve attached to the bottom of the mixing tank 22 is opened, and the fluid in the mixing tank 22 is taken out. The fluid is introduced into the metering pump 28, and a certain amount thereof is supplied to the vibration type stirring and mixing device 40. The metering pump 28 also serves as an extrusion pressure source for the fluid to pass through the vibration type stirring and mixing device 40. The viscosity of the fluid to be introduced into the vibratory agitating device 40 in the introduced temperature, when the shear rate is 100S ^-1, 1~10000mPa · s, it is preferred that particularly 10~1000mPa · s.

  Further, as shown in FIG. 1, in addition to supplying the fluid obtained in the mixing tank 22 directly to the vibrating stirring and mixing device 40, before supplying the fluid to the vibrating stirring and mixing device 40, the metering pump 28. Then, it may be further supplied to a continuous dispersion device 50 such as an in-line homomixer or a milder, and after continuous emulsification and dispersion again, it may be supplied to the vibration type stirring and mixing device 40. By re-emulsifying and dispersing in this manner, a fluid in which the oil component is further finely dispersed can be obtained.

  Also, as shown in FIG. 4, when two types of high-speed shear mixing device 21 are provided, one high-speed shear mixing device 21 is filled with the first blended raw material containing the oil component and the other high-speed shear mixing device 21 is filled. The shear mixing device 21 ′ is filled with the second blended raw material containing the aqueous component, and the oil component of one high-speed shear mixing device 21 and the aqueous component of the other high-speed shear mixing device 21 ′ are quantified. The fluid may be supplied to the continuous dispersion device 50 by the pumps 28 and 28 ′, emulsified and dispersed, and the obtained fluid may be supplied to the vibration type stirring and mixing device 40. When the pigment is blended by supplying the continuous dispersion device 50 with the oily component and the aqueous component previously mixed by separate high-speed shear mixing devices 21 and 21 'and continuously emulsifying and dispersing them. , Pigment aggregation is suppressed and the brightness of the appearance is improved.

  As described above, four jackets 34, 35, 36, and 37 are attached to the vibration type stirring and mixing device 40 as cooling jackets. The cooling jacket is preferably arranged so as to cover the cylindrical casing 41 shown in FIG. 2, and the four jackets 34, 35, 36, and 37 have a cylindrical shape as shown in FIGS. 1 and 2. The casing 41 is disposed outside the casing 41 so as to cover the casing 41. Cooling water having a predetermined temperature is circulated through each jacket, and heat exchange for cooling is performed by passing the fluid through the casing 41. By disposing the jacket on the outside of the casing 41 in this way, the fluid can be efficiently cooled, the quality of the obtained emulsion is good, and the vibration-type stirring and mixing apparatus is easy to disassemble and clean.

  In the case of a fluid containing an oily component that is solid at 25 ° C., the fluid is further mixed while passing through the vibration type stirring and mixing device 40, and at 25 ° C. It is preferable that the oily component that is solid is cooled to a temperature lower than the solidification temperature. For example, hot water circulates in the jacket 34 and is maintained at about 90 ° C., and the jacket 35 is maintained at about 45 to 50 ° C. . The remaining two jackets 36 and 37 are both kept at 0 to 10 ° C. That is, the vibration type agitation and mixing device 40 is provided with a temperature gradient that decreases from the inlet 31 side toward the outlet 32 side.

  In the vibration type agitation and mixing device 40, the agitating body 44 vibrates up and down along the axial direction thereof, so that the fluid passing through the casing 41 is provided in the flow along the agitating body 44 and the agitating blade 43. Mixed by flow turbulence through the perforations 48 and notches 49. Since the fluid existing in the position corresponding to the jacket 34 is in a state of high fluidity because the jacket 34 is maintained at about 90 ° C., mixing is promoted by the vibration of the stirring body 44, Following the mixing in the mixing tank 22, the redispersion is performed.

  The fluid is then pushed out to a position corresponding to the jacket 35. Since the temperature at this position is lower than the temperature at the position corresponding to the jacket 34, the fluid is cooled and its fluidity is lowered. In this case, the fluid is cooled while being mixed by the flow along the stirrer 44 and the disturbance of the flow through the opening 48 and the notch 49 provided in the stirrer blade 43, so that uneven cooling is less likely to occur. . Further, since there is almost no dead space in the vibration type stirring and mixing device 40, uneven stirring is less likely to occur. The vibration type stirring and mixing device 40 can perform good stirring and mixing regardless of whether the fluidity of the fluid is high or low. Since the vibration type stirring and mixing device 40 has a small calorific value, it is possible to favorably disperse the oil component particles. A small calorific value is advantageous from the viewpoint of easy temperature control.

The fluid cooled at the position corresponding to the jacket 35 is then sequentially pushed out to the position corresponding to the jackets 36 and 37 and further cooled at the position. In this way, since the fluid is continuously cooled, coalescence of the emulsified droplets is suppressed during the cooling step, the brightness of the appearance color is high, the emulsified particle size is fine, and the creamy feeling is used. When a solid oil component is contained at 0 ° C., a water-in-oil emulsified cosmetic with excellent storage stability can be produced. The target cosmetic is discharged from the discharge pipe 33 through the discharge port 32 of the vibration type stirring and mixing device 40. The temperature of the cosmetic in this state is about 30 ° C. The viscosity of the cosmetic discharged from the vibration type stirring device 40 is preferably 100 to 500,000 mPa · s, particularly 1000 to 100,000 mPa · s when the shear rate is 100 S ^{−1 at} the discharged temperature. The viscosity ratio (discharge viscosity / introduced viscosity) of the discharged cosmetic with respect to the viscosity of the fluid introduced into the vibration type stirring device 40 is preferably 10 to 10,000.

  If the target cosmetic contains a heat-sensitive component or contains a component that adversely affects the cosmetic due to heat, the component is not filled into the mixing tank 22, By supplying into the apparatus 40 from a position in the middle of the vibration type stirring and mixing apparatus 40, it is possible to avoid inconvenience due to heat. For example, in the position corresponding to the jacket 35, since the fluid is cooled to some extent, by supplying a component that is weak to heat and a component that adversely affects the cosmetic by heat to the position using a metering pump, Inconvenience due to heat can be avoided. Since the stirring and mixing of the fluid by the vibration type stirring and mixing device 40 is almost a piston flow, even if the above components are supplied from the middle of the device 40, the mixing of the components and the fluid can be performed successfully. Examples of the components include components that are easily changed in temperature, such as certain activators, volatile components, latexes, fragrances, plant extracts, and wax fine dispersions, which are contained in the first compounding raw material described later. It is done. In order to supply such components, one or a plurality of auxiliary injection ports can be provided in the middle of the vibration type stirring and mixing apparatus 40.

  In cooling using the vibration type stirring and mixing device 40, the average cooling rate is preferably set to 0.1 to 5 ° C / sec, and more preferably set to 0.2 to 2.5 ° C / sec. The average cooling rate is a value obtained by dividing the difference between the temperature when the fluid enters the vibrating stirring and mixing device 40 and the temperature when it exits by the residence time. Moreover, the frequency of the vibration type stirring and mixing apparatus 40 is preferably in the range of 5 to 30 strokes / sec, and more preferably in the range of 10 to 30 strokes / sec. The amplitude of the vibration type stirring and mixing device 40 is preferably 4 to 15 mm. Furthermore, the total amount of vibration given while being cooled by the vibration type stirring and mixing apparatus 40 is preferably 50 to 100,000 strokes, particularly 200 to 20,000 strokes.

  The cosmetic thus obtained is an emulsified cosmetic comprising a W / O emulsion, and the emulsified particle size thereof is preferably less than 10 μm, particularly preferably 5 μm or less. If it is 10 μm or less, the emulsified granules are finely dispersed. Therefore, a water-in-oil emulsified cosmetic product having a high appearance color, a fine emulsified particle size and a creamy feeling of use, and excellent storage stability.

  Next, the raw materials for the cosmetics produced in the present invention will be described. As described above, the first compounding raw material preferably contains at least one oily component that is solid at 25 ° C. The total content of the oily component that is solid at 25 ° C. is 0.1 to 50% by mass, preferably 0.5 to 20% by mass, and more preferably 1 in the total blended raw materials from the viewpoint of feeling of use and cosmetic durability. It is preferable to contain 10-10 mass%. The aqueous component added to the oily component melt-mixed under heating is preferably contained in an amount of 1 to 80% by mass, particularly 30 to 60% by mass, in the total blended raw material from the viewpoint of feeling of use.

  The oily component contained in the first blending raw material may be any of liquid, semi-solid and solid generally used in cosmetics, and may be any of synthetic and natural origin. For example, hydrocarbon oil, ester oil, animal and vegetable oil, fatty acid, higher alcohol, ether oil, silicone oil, fluorine oil and the like can be mentioned.

  Examples of the hydrocarbon oil include liquid paraffin, squalane and petrolatum. Examples of fatty acid ester oils include isostearyl octoate, neopentyl glycol dicaprate, and diglyceride. Examples of vegetable oils include olive oil, soybean oil, castor oil and the like. Animal oils include beeswax, lanolin and the like. Examples of fatty acids include stearic acid and oleic acid. Examples of higher alcohols include cetanol and stearyl alcohol. Silicone oils include volatile and non-volatile silicone oils such as dimethylpolysiloxane, methylcyclopolysiloxane, methylphenylpolysiloxane, highly polymerized methylpolysiloxane, alkyl-modified silicone, amino-modified silicone, and acrylic silicone. Can be mentioned. Furthermore, examples of the fluorine oil include fluorine-modified silicones such as fluorine ether and perfluoroalkyl ether silicone.

  Examples of the oil component that is solid at 25 ° C. contained in the first blending raw material include wax substitutes such as waxes, long-chain hydrophobic fatty acids and esters thereof. In the present invention, it is preferable to include one or more of these waxes or wax substitutes, and the amount of oily components including wax or wax substitutes contained in the total blended raw material is 10 to 80% by mass, In particular, it is preferably 20 to 60% by mass, and more preferably 25 to 55% by mass.

  Waxes widely include those having a solid / liquid reversible change and a melting point of 30-150 ° C. The melting point of the wax is preferably 45 to 150 ° C, particularly preferably 50 to 150 ° C. Examples of waxes include, for example, microcrystalline wax, paraffin wax, polyethylene wax, silicone wax, ceresin, carnauba wax, rice wax, jojoba wax, candelilla wax, whale wax, natural or synthetic beeswax (for example, from Lipochemical) Lipo wax 6138G (registered trademark)), snow wax and the like.

  Examples of wax substitutes include C18-C36 fatty acids (for example, Synchrowax AW1C (registered trademark) from Kuroda Chemical Co.), C10-C36 fatty acid triglycerides (for example, octanoic acid / dodecanoic acid-triglyceride), and hardened coco fatty acid glycerides (for example, Heels AG). Softysan 100 (registered trademark), glyceryl tribehenate (eg, Kuroda Chemical Synchrowax HRC (registered trademark)), fatty acid ester mixture (such as Henkel KGaA Cutina BW (registered trademark)), and these A mixture etc. are mentioned. Particularly preferred are jojoba oil, fatty acid ester, paraffin oil, a blend comprising fatty acid ester and paraffin oil, and a blend comprising fatty acid ester and / or paraffin oil and petrolatum.

  In addition to the oily component, the first compounding raw material can contain a nonionic surfactant, an anionic surfactant, a cationic surfactant, an amphoteric surfactant, etc. that are generally used as cosmetics as an emulsifier. . Examples of the surfactant include polyoxyethylene / methylpolysiloxane copolymer, poly (oxyethylene / oxypropylene) methylpolysiloxane copolymer, crosslinked polyether-modified silicone, crosslinked alkylpolyether-modified silicone, and cetyl. Examples thereof include dimethicone copolyol, propylene glycol monostearate, sorbitan monooleate, glyceryl stearate, polyoxyethylene hydrogenated castor oil, polyoxyethylene alkyl ether, sorbitan sesquioleate, and diglyceryl monooleate. It is preferable that the surfactant is contained in an amount of 0.1 to 10% by mass, particularly 0.2 to 5% by mass, in all blended raw materials.

  The first compounding raw material can further contain a pigment, a colorant, a polymer, and the like. By stirring the fluid containing the pigment, the colorant, and the like by the vibration type agitation and mixing device 40, the pigment, the colorant, and the like are uniformly dispersed, and thus the manufactured cosmetics have high appearance color saturation. . As the colorant, ingredients usually used in cosmetics, for example, salmon, ultramarine, bengara, iron oxide, titanium oxide, zinc oxide, silicon dioxide, carbon black, magnesium silicate, magnesium aluminum silicate, mica, synthetic Mica, synthetic sericite, sericite, talc, kaolin, silicon carbide, barium sulfate, bentonite, smectite and other inorganic powders; bright powders such as mica titanium, iron oxide mica titanium, aluminum powder; organic tar pigments, Examples thereof include pigment powders such as lake pigments of organic pigments, composite powders of fine particle titanium oxide-coated mica titanium, fine particle zinc oxide-coated mica titanium, barium sulfate-coated mica titanium, and the like. These powders can be used alone or in combination of two or more.

  As an aqueous component contained in the second blending raw material, water is a main component, and as an aqueous component other than water, for example, in addition to polyhydric alcohols such as 1,3-butylene glycol and glycerin, usually Examples include water-soluble ingredients used in cosmetics.

  Furthermore, in the present invention, the first blending raw material or the second blending raw material contains ingredients used in ordinary cosmetics, such as humectants such as sugars, amino acids, ceramides and ceramide-like structural substances; vitamins , Bioactive ingredients such as nucleic acids, plant extracts; thickeners, dispersants, stabilizers, flavoring agents, preservatives, antioxidants, chelating agents, blood circulation promoters, cooling sensates, antiperspirants, A bactericidal agent, a skin activator, etc. can be contained.

Next, the manufacturing method of the water-in-oil type emulsified cosmetic of 2nd Embodiment of this invention is demonstrated based on FIG.
About the manufacturing method of the water-in-oil type emulsion cosmetics of 2nd Embodiment, a different point from the manufacturing method of the water-in-oil type emulsion cosmetics of 1st Embodiment is demonstrated. The points that are not particularly described are the same as the method for manufacturing a water-in-oil emulsified cosmetic of the first embodiment, and the description of the method of manufacturing the water-in-oil emulsified cosmetic of the first embodiment is applied as appropriate.

  FIG. 5 shows a schematic view of an apparatus suitably used in the method of the second embodiment of the present invention. The apparatus 10 shown in FIG. 5 is roughly divided into a heating and mixing unit 20 and a cooling unit 30. Only the 1st compounding raw material containing an oil-based component is supplied to the heating mixing part 20 in the method of 2nd Embodiment, and the 2nd compounding raw material containing an aqueous component is a heating mixer different from the heating mixing part 20. 60 and mixed. The vibration type agitation and mixing device 40 provided in the cooling unit 30 is connected to the heating and mixing unit 20 by a pipe 29, and is connected to the heating and mixing machine 60 and a pipe 29 '. The vibration-type stirring and mixing apparatus 40 is supplied with the oily component in a molten state from the inlet 31 through the pipe 29, and is supplied with the aqueous component from the inlet 31 through the pipe 29 '.

  The production method of the water-in-oil emulsified cosmetic using the apparatus 10 having the above configuration will be described. First blending raw material containing an oil component in the mixing tank 22 of the high-speed shear mixing apparatus 21 provided in the heating mixing unit 20. Fill only. When the filling of the first blending raw material is completed, the mixing tank 22 is heated by the jacket 23 to bring the oily component contained in the first blending raw material into a molten state. When the first blended raw material is sufficiently melted, the valve attached to the bottom of the mixing tank 22 is opened, introduced into the metering pump 28, and a certain amount thereof is supplied to the vibrating stirring and mixing device 40 through the pipe 29.

  A second mixing raw material containing an aqueous component is charged in a heating mixer 60 different from the heating mixing unit 20 and heated and mixed, and the oil component is supplied to the inlet 31 of the vibration type agitating and mixing device 40. At the same time, a certain amount of the second blended raw material is supplied to the inlet 31 through the pipe 29 ′ by the metering pump 28 ′, and passes through the vibration stirring and mixing device 40 while being emulsified and dispersed inside the vibration stirring and mixing device 40. And the obtained fluid is continuously cooled. Specifically, the heated oily component and the aqueous component are supplied from the inlet 31 into the casing 41 of the vibration type stirring and mixing device 40 and emulsified and dispersed in the mixing chamber 47 located in the jacket 34 of the casing 41. The obtained fluid is sequentially pushed up to positions corresponding to the jackets 35, 36, and 37 by the stirring body 44 that vibrates up and down, and is continuously cooled by passing through the casing 41. In this way, since the fluid is continuously cooled, coalescence of emulsified droplets is suppressed during the cooling step, the brightness of the appearance color is high, and the emulsified particle size is fine and creamy water-in-oil type. An emulsified cosmetic can be produced.

  In the method of the second embodiment, the oil component and the aqueous component are supplied into the casing 41 from the common inflow port 31 located on the jacket 34 side of the casing 41. The casing 41 may be supplied from a separate inlet located in the jacket 34.

  The cosmetics produced by the methods of the first and second embodiments described above are used as a water-in-oil emulsified foundation and have high covering power against skin defects such as spots, freckles, uneven color, and pores. It has a good fit on the skin, a good feeling of use such as water repellency, water resistance, sweat resistance, etc., and good storage stability.

  As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment. For example, in the above-described embodiment, one vibration type stirring and mixing device 40 is used, but instead of this, as shown in FIG. 6, two or more vibration type stirring and mixing devices 40 and 40 ′ are connected in series. Can be used. In this case, by supplying a heat-sensitive component or the like from the middle of the second vibration-type stirring and mixing device 40 ′ located on the downstream side, the stirring conditions until the wax solidifies, the mixing conditions of the components, etc. Each can be selected appropriately.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such examples.

[Examples 1 to 4]
A cream foundation having the composition shown in Table 1 was prepared using the apparatus shown in FIG. 1 (however, the continuous dispersion apparatus 50 is not provided). Components 1-9 were heated and mixed at 80 ° C., then components 14-19 were added and dispersed with a homomixer to obtain an oil phase. 10-13 components were heated and mixed at 80 ° C. to obtain an aqueous phase. The water phase was added to the oil phase with stirring at 80 ° C. and emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid is supplied to a vibratory stirring and mixing device (Vibro mixer manufactured by Chilling Industries Co., Ltd.) with a metering pump, and continuously cooled to 30 ° C. or lower while stirring in the device. Obtained. In the vibration type stirring and mixing apparatus, the temperature of the jacket 34 was set to 80 ° C., the temperature of the jacket 35 was set to 0 ° C., the temperature of the jacket 36 was set to 0 ° C., and the temperature of the jacket 37 was set to 0 ° C. The average cooling rate was 0.7 ° C./sec. The vibration frequency of the vibration type stirring and mixing apparatus was different in each example, and was the frequency shown in Table 2. The total amount of vibration of the vibration type stirring and mixing apparatus was also different in each example, and was the total amount of vibration shown in Table 2. The amplitude of the vibration type stirring and mixing apparatus was common and was 5 mm.

[Example 4-2]
A cream foundation having the composition of Table 3 was prepared using the apparatus shown in FIG. Components 1 to 8 were heated and mixed at 80 ° C., then components 13 to 18 were added and dispersed with a homomixer to obtain an oil phase. Components 9 to 12 were heated and mixed at 80 ° C. to obtain an aqueous phase. The water phase was added to the oil phase while stirring at 80 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion. This W / O emulsion was further fed to a continuous homomixer with a metering pump, and continuously re-emulsified and dispersed. The W / O emulsion is continuously supplied to a vibration type stirring and mixing apparatus (Vibro mixer manufactured by Chilling Industries Co., Ltd.) as it is, and continuously cooled to 30 ° C. or lower while stirring in the apparatus. A / O emulsified foundation was obtained. In the vibration type stirring and mixing apparatus, the jacket temperature was set to 0 ° C. The average cooling rate was 0.7 ° C./sec.

[Example 4-3]
A cream foundation having the composition of Table 3 was prepared using the apparatus shown in FIG. Components 1 to 8 were heated and mixed at 80 ° C., then components 13 to 18 were added and dispersed with a homomixer to obtain an oil phase. The components 9 to 12 were supplied to a heating mixer different from the homomixer to which the components 1 to 18 were added, and heated and mixed at 80 ° C. to obtain an aqueous phase. Each of the oil phase and the aqueous phase was supplied to a continuous homomixer with a metering pump, and continuously emulsified and dispersed to obtain a W / O emulsion. This W / O emulsion is continuously supplied to a vibration type stirring and mixing device (Vibro mixer manufactured by Chilling Industries Co., Ltd.) as it is, and continuously cooled to 30 ° C. or lower while stirring in the device. A / O emulsified foundation was obtained. In the vibration type stirring and mixing apparatus, the jacket temperature was set to 0 ° C. The average cooling rate was 0.7 ° C./sec.

[Example 4-4]
A cream foundation having the composition of Table 3 was prepared using the apparatus shown in FIG. Components 1 to 8 were heated and mixed at 80 ° C., then components 13 to 18 were added and dispersed with a homomixer to obtain an oil phase. The components 9 to 12 were supplied to a heating mixer different from the homomixer to which the components 1 to 18 were added, and heated and mixed at 80 ° C. to obtain an aqueous phase. The oil phase and the water phase are each supplied directly from a common inlet 31 to a vibration type stirring and mixing device (Vibro mixer manufactured by Chilling Industry Co., Ltd.) with a metering pump, and continuously emulsified and dispersed in the device. While conducting, the mixture was cooled to 30 ° C. or lower while continuously stirring in the apparatus to obtain a W / O emulsified foundation. In the vibration type stirring and mixing apparatus, the temperature of the jacket 34 was set to 80 ° C., and the temperature of the jacket 37 was set to 0 ° C. The average cooling rate was 0.5 ° C./sec.

[Comparative Example 1]
A cream foundation having the composition shown in Table 1 was prepared. Components 1-9 were heated and mixed at 80 ° C., then components 14-19 were added and dispersed with a homomixer to obtain an oil phase. 10-13 components were heated and mixed at 80 ° C. to obtain an aqueous phase. The aqueous phase was added to the oil phase with stirring at 80 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid was cooled with stirring with a homomixer and cooled to 30 ° C. or lower to obtain a W / O emulsified foundation. The average cooling rate was 0.02 ° C./sec.

[Evaluation]
(Emulsified particle size)
The cream foundation obtained in 4 of Examples 1 to 4 and Comparative Example 1 was dropped on a slide glass, sandwiched between cover glasses so as not to crush the emulsified droplets, observed with an optical microscope, and emulsified using calipers. The particle size was measured and the average value of n = 100 was determined. The obtained results are shown in Table 2. FIG. 7 shows the relationship between the total vibration amount of the vibration type stirring and mixing apparatus and the emulsified particle size.

(Feeling of use)
The cream foundation obtained in Example 1 to Example 4 and Comparative Example 1 was actually used and evaluated for a creamy feel. The evaluation criteria are as follows. The obtained results are shown in Table 2.
◎: Very good ○: Good △: Normal ×: Bad

(brightness)
About the cream foundation obtained by 4 of Example 1- Example 4, the lightness (L * value) was measured using the color difference meter (Nippon Denshoku Industries Co., Ltd. NF333). The average value of n = 5 was obtained, and the results obtained are shown in Table 2. FIG. 9 shows the relationship between the total amount of vibration and the lightness (L * value) of the vibration type stirring and mixing apparatus.

(viscosity)
For the cream foundations obtained in Example 1 to Example 4 and Comparative Example 1, the viscosity at a temperature before the introduction of the vibration type stirring and mixing apparatus and the viscosity at 30 ° C. of the cream foundation after discharge were measured. Table 2 shows the results of measuring the viscosity at a shear rate of 100 S ^-1 using a rheometer (MCR300 manufactured by PHYSICA). FIG. 8 shows the relationship between the total vibration amount and the viscosity of the vibration type stirring and mixing apparatus.

(Stability)
The cream foundation obtained in 4 of Examples 1 to 4 and Comparative Example 1 was stored in a glass container with a lid, and the state after standing at room temperature for 1 month was evaluated according to the following criteria. The obtained results are shown in Table 2.
◎: No water separation ○: Some water separation ×: Water separation Also, optical microscope images of emulsified droplets when the cream foundations obtained in Example 3 and Comparative Example 1 were cooled to 25 ° C. This is shown in FIGS. 10 (a) and 10 (b). Moreover, the optical microscope image of the emulsified droplet after the cream foundation obtained in Example 3 and Comparative Example 1 was stored at room temperature for 1 month is shown in FIGS. 11 (a) and 11 (b).

  As is apparent from the results shown in Table 2, the cream foundation obtained in Example 1 to Example 4 has smaller emulsified particles than those obtained in Comparative Example 1, and the properties as a cream foundation. It turns out that it is excellent in. From the results of FIGS. 7 and 8, it can be seen that the larger the total vibration amount, the smaller the emulsified particle size, the higher the viscosity, and the creamy feel. From the results of FIG. 9, it can be seen that as the total vibration amount increases, the lightness (L * value) increases and a bright appearance color is obtained. From the results of FIG. 10 and FIG. 11, it can be seen that the cream foundation obtained in Example 3 can suppress coalescence of emulsified droplets during cooling and has good stability after one month. (Although not shown, in Examples 1, 2, 4 to 4 as well, coalescence of emulsified droplets after storage for 1 month could be suppressed.)

[Examples 5 to 8]
A makeup base having the composition shown in Table 4 was prepared using the apparatus shown in FIG. 1 (however, the continuous dispersion apparatus 50 was not provided). Components 1-6 were heated and mixed at 75 ° C., then components 7-14 were added and dispersed with a homomixer to obtain an oil phase. The components of 15-17 were heated and mixed at 75 ° C. to obtain an aqueous phase. The water phase was added to the oil phase while stirring at 75 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid was supplied to a vibratory stirring and mixing device (Vibro mixer manufactured by Chilling Industries Co., Ltd.) with a metering pump, and continuously cooled to 30 ° C. or lower while stirring in the device to obtain a makeup base. In the vibration type stirring and mixing apparatus, the temperature of the jacket 34 was set to 75 ° C., the temperature of the jacket 35 was set to 0 ° C., the temperature of the jacket 36 was set to 0 ° C., and the temperature of the jacket 37 was set to 0 ° C. The average cooling rate was 0.7 ° C./sec. The vibration frequency of the vibration type stirring and mixing apparatus was different in each example, and was the frequency shown in Table 5. The amplitude of the vibration type stirring and mixing apparatus was common and was 5 mm.

[Comparative Example 2]
A makeup base having the composition shown in Table 4 was prepared. Components 1-6 were heated and mixed at 75 ° C., then components 7-14 were added and dispersed with a homomixer to obtain an oil phase. The components of 15-17 were heated and mixed at 75 ° C. to obtain an aqueous phase. The water phase was added to the oil phase while stirring at 75 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid was cooled with stirring with a propeller, cooled with stirring to 30 ° C. or lower, and finally stirred with a homomixer (2000 rpm, 5 minutes) to obtain a makeup base. The average cooling rate was 0.02 ° C./sec.

[Evaluation]
For the makeup bases obtained in Examples 5 to 8 and Comparative Example 2, the usability and stability were evaluated in the same manner as in Example 1. The results obtained are shown in Table 5.

(finish)
The makeup bases obtained in Examples 5 to 8 and Comparative Example 2 were actually used, and the finish was evaluated. The evaluation criteria are as follows. The results obtained are shown in Table 5.
◎: Very good ○: Good △: Normal ×: Bad

  As is apparent from the results shown in Table 5, it can be seen that the makeups obtained in Examples 5 to 8 are superior to those obtained in Comparative Example 2 in the properties as a makeup base. Moreover, it turns out that the tendency is excellent, so that a frequency becomes large.

[Examples 9 to 12]
A liquid emulsified eye shadow having the composition shown in Table 6 was prepared using the apparatus shown in FIG. 1 (however, the continuous dispersion apparatus 50 is not provided). After the components 1-7 were heated and mixed at 75 ° C., the components 8-11 were added and dispersed with a homomixer to obtain an oil phase. 12 to 15 components were heated and mixed at 75 ° C. to obtain an aqueous phase. The water phase was added to the oil phase while stirring at 75 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid is supplied to a vibratory stirring and mixing apparatus (Vibro mixer manufactured by Chilling Industries Co., Ltd.) with a metering pump, and continuously cooled to 30 ° C. or lower while stirring in the apparatus to obtain a liquid emulsified eye shadow. It was. In the vibration type stirring and mixing apparatus, the temperature of the jacket 34 was set to 75 ° C., the temperature of the jacket 35 was set to 0 ° C., the temperature of the jacket 36 was set to 0 ° C., and the temperature of the jacket 37 was set to 0 ° C. The average cooling rate was 0.7 ° C./sec. The vibration frequency of the vibration type stirring and mixing apparatus was different in each example, and was the frequency shown in Table 7. The amplitude of the vibration type stirring and mixing apparatus was common and was 5 mm.

[Comparative Example 3]
A liquid emulsified eye shadow having the composition shown in Table 6 was prepared. After the components 1-7 were heated and mixed at 75 ° C., the components 8-11 were added and dispersed with a homomixer to obtain an oil phase. 12 to 15 components were heated and mixed at 75 ° C. to obtain an aqueous phase. The water phase was added to the oil phase while stirring at 75 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid was cooled with stirring with a propeller, cooled with stirring to 30 ° C. or lower, and finally stirred with a homomixer (2000 rpm, 5 minutes) to obtain a liquid emulsified eye shadow. The average cooling rate was 0.02 ° C./sec.

[Evaluation]
For the liquid emulsified eye shadows obtained in Examples 9 to 12 and Comparative Example 3, the feel and stability were evaluated in the same manner as in Example 1, and the finish was evaluated in the same manner as in Example 5. The results obtained are shown in Table 7.

  As is clear from the results shown in Table 7, the liquid emulsified eye shadows obtained in Examples 9 to 12 are superior in properties as liquid emulsified eye shadows than those obtained in Comparative Example 3. I understand that. Moreover, it turns out that the tendency is excellent, so that a frequency becomes large.

[Example 13 to Example 16]
An emulsion sunscreen having the composition of Table 8 was prepared using the apparatus shown in FIG. 1 (however, the continuous dispersion apparatus 50 is not provided). Components 1-6 were heated and mixed at 80 ° C., then components 7-8 were added and dispersed with a homomixer to obtain an oil phase. Components 9 to 11 were heated and mixed at 80 ° C. to obtain an aqueous phase. The aqueous phase was added to the oil phase with stirring at 80 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid is supplied to a vibratory stirring and mixing device (Vibro mixer manufactured by Chilling Industries Co., Ltd.) with a metering pump, and continuously cooled to 30 ° C. or lower while stirring in the device to obtain an emulsion sunscreen. It was. In the vibration type stirring and mixing apparatus, the temperature of the jacket 34 was set to 80 ° C., the temperature of the jacket 35 was set to 5 ° C., the temperature of the jacket 36 was set to 0 ° C., and the temperature of the jacket 37 was set to 0 ° C. The average cooling rate was 0.7 ° C./sec. The vibration frequency of the vibration type stirring and mixing apparatus was different in each example, and was the frequency shown in Table 9. The amplitude of the vibration type stirring and mixing apparatus was common and was 5 mm.

[Comparative Example 4]
An emulsion sunscreen having the composition of Table 8 was prepared. Components 1-6 were heated and mixed at 80 ° C., then components 7-8 were added and dispersed with a homomixer to obtain an oil phase. Components 9 to 11 were heated and mixed at 80 ° C. to obtain an aqueous phase. The aqueous phase was added to the oil phase with stirring at 80 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid was cooled with stirring with a propeller, cooled with stirring to 30 ° C. or lower, and finally stirred with a homomixer (2000 rpm, 5 minutes) to obtain an emulsion sunscreen. The average cooling rate was 0.02 ° C./sec.

[Evaluation]
The emulsion sunscreens obtained in Examples 13 to 16 and Comparative Example 4 were evaluated for usability and stability in the same manner as in Example 1. Table 9 shows the obtained results.

  As is clear from the results shown in Table 9, the emulsion sunscreens obtained in Examples 13 to 16 are superior to those obtained in Comparative Example 4 in properties as an emulsion sunscreen. I understand that. Moreover, it turns out that the tendency is excellent, so that a frequency becomes large.

Example 17
A cosmetic cream having the composition shown in Table 10 was prepared using the apparatus shown in FIG. 1 (however, the continuous dispersion apparatus 50 was not provided). Components 1 to 7 were heated and mixed at 80 ° C., then components 16 to 17 were added and dispersed with a homomixer to obtain an oil phase. 8-11 components were heated and mixed at 80 ° C. to obtain an aqueous phase. The aqueous phase was added to the oil phase with stirring at 80 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. This fluid was supplied to a vibratory stirring and mixing device (Vibro mixer manufactured by Chilling Industries Co., Ltd.) with a metering pump, and continuously cooled to 30 ° C. or lower while stirring in the device to obtain a cosmetic cream. In the vibration type stirring and mixing apparatus, the temperature of the jacket 34 was set to 80 ° C., the temperature of the jacket 35 was set to 5 ° C., the temperature of the jacket 36 was set to 5 ° C., and the temperature of the jacket 37 was set to 5 ° C. The average cooling rate was 0.7 ° C./sec.

Example 18
A cosmetic cream having the composition of Table 10 was prepared using the apparatus shown in FIG. Components 1 to 7 were heated and mixed at 80 ° C., then components 16 to 17 were added and dispersed with a homomixer to obtain an oil phase. Components 8 to 11 were supplied to a heating mixer different from the homomixer to which components 1 to 17 were added, and heated and mixed at 80 ° C. to obtain an aqueous phase. Each of the oil phase and the aqueous phase was supplied to a continuous homomixer with a metering pump, and continuously emulsified and dispersed to obtain a W / O emulsion. This W / O emulsion is continuously supplied to a vibration type stirring and mixing device (Vibro mixer manufactured by Chilling Industries Co., Ltd.) as it is, and continuously cooled to 30 ° C. or lower while stirring in the device. A cream was obtained. In the vibration type stirring and mixing apparatus, the jacket temperature was set to 0 ° C. The average cooling rate was 0.7 ° C./sec.

Example 19
A cosmetic cream having the composition shown in Table 10 was prepared using the apparatus shown in FIG. Components 1 to 7 were heated and mixed at 80 ° C., then components 16 to 17 were added and dispersed with a homomixer to obtain an oil phase. Components 8 to 11 were supplied to a heating mixer different from the homomixer to which components 1 to 17 were added, and heated and mixed at 80 ° C. to obtain an aqueous phase. The oil phase and the water phase are each supplied directly from a common inlet 31 to a vibration type stirring and mixing device (Vibro mixer manufactured by Chilling Industry Co., Ltd.) with a metering pump, and continuously emulsified and dispersed in the device. While performing, the mixture was cooled to 30 ° C. or lower while continuously stirring in the apparatus to obtain a cosmetic cream. In the vibration type stirring and mixing apparatus, the temperature of the jacket 34 was set to 80 ° C., and the temperature of the jacket 37 was set to 0 ° C. The average cooling rate was 0.6 ° C./sec.

[Comparative Example 5]
A cosmetic cream having the composition of Table 10 was prepared. Components 1 to 7 were heated and mixed at 80 ° C., then components 16 to 17 were added and dispersed with a homomixer to obtain an oil phase. 8-11 components were heated and mixed at 80 ° C. to obtain an aqueous phase. The aqueous phase was added to the oil phase with stirring at 80 ° C., and the mixture was emulsified with a homomixer to obtain a W / O emulsion fluid. The fluid was cooled with stirring with a propeller, cooled to 30 ° C. or lower, and finally stirred with a homomixer (2000 rpm, 5 minutes) to obtain a cosmetic cream. The average cooling rate was 0.02 ° C./sec.

[Evaluation]
The cosmetic creams obtained in Examples 17 to 19 and Comparative Example 5 were evaluated for use feeling and stability in the same manner as in Example 1. The obtained results are shown in Table 11.

  As is apparent from the results shown in Table 11, it can be seen that the cosmetic creams obtained in Examples 17 to 19 are superior in characteristics as cosmetic creams than those obtained in Comparative Example 5.

DESCRIPTION OF SYMBOLS 10 Apparatus 20 Heating mixing part 30 Cooling part 40 Vibrating stirring mixing apparatus 41 Casing 42 Drive shaft 43 Stirring blade 44 Stirring body 50 Continuous dispersion apparatus 60 Heating mixer

Claims (10)

A method for producing a water-in-oil emulsified cosmetic comprising a step of adding an aqueous component to an oily component under heating and cooling a fluid obtained by emulsification and dispersion,
In a tubular casing, using a vibration type stirring and mixing device provided with a stirrer composed of a drive shaft and a stirring blade attached to the drive shaft, the drive shaft being configured to vibrate in the axial direction, A method for producing a water-in-oil emulsified cosmetic, wherein the fluid is continuously cooled by passing through a vibration type stirring and mixing device. A method for producing a water-in-oil emulsified cosmetic comprising a step of adding an aqueous component to an oily component under heating and emulsifying and dispersing, and a step of cooling a fluid obtained thereby,
In the tubular casing, using a vibration type stirring and mixing device provided with a stirrer composed of a drive shaft and a stirring blade attached to the drive shaft, the drive shaft being configured to vibrate in the axial direction, The fluid obtained by emulsifying and dispersing the aqueous component and the heated oily component are supplied to the vibrating stirring and mixing device while passing through a part of the vibrating stirring and mixing device while being emulsified and dispersed. A method for producing a water-in-oil emulsified cosmetic that continuously cools by passing another part of the apparatus in a vibration type stirring and mixing apparatus. The oily component comprises a solid component at 25 ° C .;
The fluid is made by melting a first compounding raw material containing one or more of the oily components under heating, adding a second compounding raw material containing an aqueous component to the state, and emulsifying and dispersing it. Because
The method for producing a water-in-oil emulsified cosmetic according to claim 1 or 2, wherein, in the cooling step, the fluid is cooled to a solidification temperature or lower of an oily component that is solid at 25 ° C.   4. The oil according to claim 1, wherein the vibration type agitation and mixing device includes a cooling jacket that circulates cooling water outside the casing, and cools the fluid by passing the fluid through the casing. A method for producing a water-type emulsified cosmetic.   The method for producing a water-in-oil emulsified cosmetic according to any one of claims 1 to 4, wherein the fluid containing 0.1 to 50% by mass of the oily component that is solid at 25 ° C is used in all ingredients. .   The method for producing a water-in-oil emulsified cosmetic according to any one of claims 1 to 5, wherein the fluid containing 1 to 80% by mass of the aqueous component is used in all ingredients.   The method for producing a water-in-oil emulsified cosmetic according to any one of claims 1 to 6, wherein the water-in-oil emulsified cosmetic to be produced has an emulsified particle size of less than 10 µm.   The method for producing a water-in-oil emulsified cosmetic according to any one of claims 1 to 7, wherein an average cooling rate in the cooling step using the vibration-type stirring and mixing device is 0.1 to 5 ° C / sec.   The method for producing a water-in-oil emulsified cosmetic according to any one of claims 1 to 8, wherein the vibration type stirring and mixing device has a frequency of 5 to 30 strokes / sec.   A water-in-oil emulsified cosmetic obtained by the production method according to claim 1.