JP5543079B2 - Silicone elastomer composite powder and cosmetics - Google Patents

Description

  The present invention particularly relates to a novel silicone elastomer composite powder for cosmetics. More specifically, it consists of a silicone elastomer composite powder coated on the surface of the silicone elastomer powder in a state in which the plate-like particles are radiated, and has a high oil absorption, less glare and less shine, and it is difficult to break down the makeup. It is a silicone elastomer composite powder for cosmetics that is excellent in fluidity and dispersibility and has a soft focus effect.

  The main component of the silicone elastomer powder is a silicone elastic material, so that it has the characteristics of silicone rubber. When blended with cosmetics, a soft feel peculiar to the rubber elastomer can be obtained. Proposed.

  The silicone elastomer powder is spherical in shape and has primary particles of 2 to 15 μm. Usually, the silicone elastomer powder does not exist in a state of primary particles, but exists in a state of being aggregated in a high-order several hundred μm or more in a bunch of grapes.

  The oil absorption of the silicone elastomer powder is as high as 300 to 350 g / 100 g. Such high oil-absorbing properties include primary particles agglomerated in the shape of a tuft of grapes to form high-order agglomerated particles of several hundred μm or more, and this agglomerated particle space is also included in a state where a large amount of oil is contained. It is one of the major factors.

  Even if this agglomerated silicone elastomer powder is blended in cosmetics as it is, and the cosmetics are produced with a normal cosmetic production apparatus, it is difficult to disintegrate them to primary particles, and the aggregates remain in the cosmetics. To do. As a result, there was a problem that the remaining agglomerate behaved like a foreign substance and had a poor feel such as elongation and slip.

  When the silicone elastomer powder in which the aggregates remain is blended in cosmetics, the oil absorption amount of the silicone elastomer powder is not stable because the ratio of the aggregates is not constant. When the specified oil is added at the time of production, if the oil absorption amount of the blended silicone elastomer powder is too low, excess oil will remain, resulting in a sticky cosmetic, and if the oil absorption amount is too large, the blended oil will become a silicone elastomer. There is a problem in that it is absorbed and becomes a bulky cosmetic, and a stable cosmetic cannot be produced.

  In addition, when the silicone elastomer powder in which aggregates remain is blended with solid cosmetics such as press powder, it is molded into the prescribed cosmetic shape at the initial molding pressure of the press with the molding pressure during pressing. However, there is a problem that cracks occur in the molded cosmetics due to the action of the remaining elastomer aggregates to return to the original shape over time after molding.

  In order to disintegrate the agglomeration of the above-mentioned silicone elastomer powder, improvement of pulverizers as a mechanical method, as a process method, a method of coating an inorganic powder on a silicone elastomer powder, a mechanical method and a process Various methods, such as a method combining both methods, have been proposed.

  For example, a method of stirring / mixing with a mortar, grinder, ball mill, Henschel mixer, Nauter mixer, Redige mixer, V-type mixer, etc. Patent Document 4 and Patent Document 5 are proposed.

  However, the method using a mortar, crusher, and ball mill has a small shearing force, and static electricity is generated due to mixing for a long time to cause re-aggregation. The method using impact with the latter hammer mill, pin mill, etc. is a silicone elastomer powder. There was a problem that the rubber elasticity of the rubber absorbed the impact force and crushing was insufficient.

  In order to improve these, a method of confining silicone elastomer powder in a sealed space using a sealed multi-stage shear type shear extruder, applying a shearing force, and dispersing agglomerates by shear stress is disclosed in Patent Document 6 and Patent Document 7 is proposed.

  However, this method has a problem that the operability is complicated, and the productivity is low and the production cost is high in industrial scale production.

  Therefore, as a method for improving productivity, Patent Document 8 proposes a dry pulverizer such as a cutter mill, a turbo mill, and an impeller mill having both a shearing mechanism and a classification mechanism.

  By the method described above, the inorganic powder was coated on the silicone elastomer, and the aggregation of the silicone elastomer was crushed, and it became possible to produce a composite powder having a stable oil absorption. However, the plate-like powder coated the surface of the silicone elastomer powder. Since it is covered so as to cover it, the oil absorption is 200 g / 100 g or less, and a highly oil-absorbing silicone elastomer composite powder cannot be obtained. When blended as a cosmetic, there is a problem such as shine due to glare. there were.

JP-A 63-77942 JP-A 64-70558 Japanese Patent No. 3273573 JP-A-9-208709 Japanese Patent Laid-Open No. 10-36219 JP-A-5-305223 Japanese Patent No. 3126553 Japanese Patent No. 3442698

  The above-mentioned conventional techniques include improvement of a grinding machine as a mechanical method, a method of coating an inorganic powder on the surface of a silicone elastomer powder as a process method, and both a mechanical method and a process method. By the method, the plate-like powder was coated on the surface of the silicone elastomer powder, and the crushing of the silicone elastomer was improved. However, attention was not paid to the oil absorption, glare and shine. Furthermore, the selection of the shape and particle diameter of the plate-like particles to be coated on the silicone elastomer powder, the amount of coating, etc. have not been sufficiently examined.

An object of the present invention is to provide a highly oil-absorbing silicone elastomer powder. Further, it has a high oil-absorbing amount, less glare, suppresses shininess, is resistant to makeup collapse, is durable, and has excellent fluidity and dispersibility. An object of the present invention is to provide a soft and good cosmetic material unique to silicone elastomers for use in coating materials.

  As a result of diligent research to solve the above-mentioned problems of the prior art, the silicone elastomer powder is agglomerated by covering the surface of the silicone elastomer powder with plate-like particles radiated in a three-dimensional manner. In addition, it provides a silicone elastomer composite powder having a stable high oil absorption, for example, suppressing glare and shine, being hard to break the makeup, and having excellent fluidity and dispersibility. It has been found that a soft and pleasant cosmetic material peculiar to the original rubber elastomer is produced. The present invention is described in detail below.

  The present invention is composed of silicone elastomer composite particles in which the surface of a silicone elastomer powder is coated with plate-like particles in a three-dimensional radial state, and the oil absorption is 200 g / 100 g or more. It is characterized by being persistent and resistant to makeup collapse.

  The manufacturing method of the silicone elastomer composite powder goes through the following three steps. First, a processed product in which plate-like particles are dispersed and adhered to the surface of the agglomerated silicone elastomer is obtained by mixing and stirring the plate-like particles and the silicone elastomer at a peripheral speed of 40 m / sec or less in advance. Next, physical energy having a peripheral speed of 70 m / sec or more and a centrifugal effect of 2000 G or more is continuously given to the treated material adhered to the silicone elastomer in which the plate-like particles are aggregated, and the aggregated silicone powder is aggregated. Crush and coat directly with inorganic particles. In this step, since the energy is given to the processed material, the temperature of the processed material rises. Therefore, in the above step, the processed material is cooled using a refrigerant such as water. Finally, the processed product is mixed and stirred at a peripheral speed of 20 m / sec or less, cooled to room temperature, and collected.

  According to the present invention, the agglomerated silicone elastomer powder is crushed, and the surface of the silicone elastomer powder is coated with plate-like particles in a state of being radiated three-dimensionally, thereby having high oil absorption. It is possible to provide a silicone elastomer composite powder for cosmetics that suppresses glare and shine, is resistant to makeup collapse, is durable, and has excellent fluidity and dispersibility.

  In addition, by blending the silicone elastomer composite powder of the present invention into a cosmetic, the silicone elastomer powder does not have the inherent stickiness and can be made into a cosmetic that takes advantage of properties such as lubricity and spreadability. It is very excellent in terms.

  The best mode of the present invention will be described below.

(Silicone elastomer powder)
The silicone elastomer powder used in the present embodiment is a silicone rubber synthesized by addition reaction curing, condensation reaction curing, radical reaction curing with an organic peroxide, and ultraviolet irradiation curing, and in particular, addition reaction curing or condensation reaction curing. What formed the cured silicone composition is preferable. The silicone elastomer may or may not contain non-crosslinked oil. Details regarding these silicone elastomer powders are described in Japanese Patent No. 3535389.

  As the silicone elastomer powder, Trefill E series manufactured by Toray Dow Corning Co., Ltd. and silicone rubber powder manufactured by Shin-Etsu Chemical Co., Ltd. are commercially available. The Trefill E series manufactured by Toray Dow Corning Co., Ltd. includes Trefill E-505C, Trefill E-506S, Trefill E-507, Trefill E-508, and the like. On the other hand, silicone rubber powder manufactured by Shin-Etsu Chemical Co., Ltd. includes KMP-597, KMP-598, KMP-594 and KMP-X-52-875. For cosmetic applications, the Trefil E series manufactured by Toray Dow Corning Co., Ltd. is suitable.

  The average primary particle size of the silicone elastomer is preferably 0.1 to 100 μm, more preferably 2 to 15 μm. The silicone hardness is preferably JIS hardness of less than 90, more preferably JIS hardness of 5-80.

(Plate-like particles)
Examples of the plate-like particles include mica, synthetic mica, mica, mica titanium, synthetic phlogopite, talc, sericite, plate-like alumina, plate-like barium sulfate, plate-like titanium oxide, and boron nitride. Mica, synthetic mica, mica, mica titanium, synthetic phlogopite, and the like are preferable. These plate-like powders include those that have been surface-treated with silicone or fluorine. One or more kinds of these plate-like particles may be combined.

  The average primary particle diameter of the plate-like particles is preferably 1 to 30 μm, more preferably 2 to 20 μm. If the average primary particle size of the plate-like particles is too small, the space between the plate-like particles that are three-dimensionally radiated becomes narrow, and a high oil absorption cannot be obtained. If the average primary particle diameter of the plate-like particles is too large, the plate-like particles do not pierce the silicone elastomer three-dimensionally, and the plane of the plate-like particles is covered with the silicone elastomer in a tile shape. Become. Further, when the average primary particle size of the plate-like particles is increased, they are not compounded with the silicone elastomer.

  The aspect ratio of the plate-like particles is preferably 10 to 100, more preferably 25 to 60. If the aspect ratio of the plate-like particles is too small, the plate-like particles do not pierce the silicone elastomer three-dimensionally, and the plane of the plate-like particles is covered with the silicone elastomer in a tile shape. If the aspect ratio of the plate-like particles is too large, the plate-like particles are broken by the physical energy received during the compositing process.

  The mass ratio of the plate-like particles to the silicone elastomer powder is preferably plate-like particles: silicone elastomer powder = 10: 90 to 80:20, more preferably plate-like particles: silicone elastomer = 20: 80 to 70:30. It is. If the amount of the plate-like particles is too small relative to the silicone elastomer powder, it is difficult to sufficiently break up the giant aggregates of the silicone elastomer. On the other hand, if the amount is too small, plate-like particles that are not compounded with the silicone elastomer remain, The powdery characteristics are strong, resulting in the loss of the soft feeling of use that has the lubricity and spreadability inherent to the original rubber elastomer.

(Oil absorption)
The oil absorption of the silicone elastomer composite powder of the present embodiment is 200 g / 100 g or more, preferably 200 to 350 g / 100 g. If the amount of oil absorption is too small, when the silicone elastomer composite powder is blended into cosmetics, it becomes a cosmetic with a bulky feel. As a result, the soft feeling of use with the lubricity and spreadability characteristic of rubber elastomers is impaired.

The method for measuring the oil absorption was in accordance with JIS K-5101. In order to observe the state of fluidization more clearly, dimethyl silicone oil (SH200C-5CS manufactured by Toray Dow Corning Co., Ltd.) was used in place of the linseed oil described in JIS K-5101. Specifically, 1 g of silicone elastomer composite powder is accurately weighed and placed on a glass plate. Add dimethyl silicone oil in small amounts to the center of the composite powder, and knead it with a spatula each time. Then, the whole becomes a paste, and the point immediately before fluidization is taken as the end point, and the following formula is used.
(Equation 1)
Oil absorption (g / 100 g) = (SH200C-5CS (g) / sample amount (g)) × 100

(Method for producing silicone elastomer composite powder)
By crushing the agglomerated silicone elastomer powder of the present embodiment and coating the surface of the silicone elastomer powder in a state where the plate-like particles are radiated three-dimensionally, there is high oil absorption, In order to obtain a silicone elastomer composite powder for cosmetics that suppresses glare and shine, is durable and does not collapse easily, and has excellent fluidity and dispersibility, mixing, stirring, compounding, and cooling, which will be described below, 3 It is manufactured through a process. First, a processed product in which plate-like particles are adhered to the surface of the aggregated silicone elastomer is obtained by mixing and stirring the plate-like particles and the silicone elastomer at a peripheral speed of 40 m / sec or less in advance.

  At this stage, the plate-like particles are attached to the surface of the agglomerated silicone elastomer of several hundred μm. Visual observation is smooth and the aggregates are in a state of being crushed, but when observed with a scanning electron microscope, the aggregation of the silicone elastomer is not crushed.

  Next, the plate-like particles adhered to the silicone elastomer aggregate were continuously given physical energy at a peripheral speed of 70 m / sec or more and a centrifugal effect of 2000 G or more, thereby aggregating several hundred μm. The plate-like particles adhering to the surface of the silicone elastomer tear the aggregation of the agglomerated silicone elastomer, and further, the compounding begins to be directly stuck into the silicone elastomer. The above behavior is repeated with the passage of time, and the compounding progresses, and the compounding process ends when all the plate-like particles are coated.

  The compounding process is terminated by collecting the processed material over time and observing the compound state with a scanning electron microscope. Determining the end of the composite state by such a method is a cumbersome operation, but once the conditions are determined, they may be manufactured under the same conditions.

  In the compounding step, since high energy is given to the processed material from the outside, the temperature of the processed material rises. Therefore, the composite processing is performed while cooling using a refrigerant such as water.

  When the treatment is completed, the treated product is mixed and stirred at a peripheral speed of 20 m / sec or less, cooled to room temperature, and the treated product is recovered as a product.

  The main devices used for producing the composite powder in the present embodiment are a mixing / stirring device, a compounding device, and a cooling device. The mixing / stirring device needs to have a function of stirring and mixing the plate-like particles and the silicone elastomer and dispersing and adhering the plate-like particles to the surface of the aggregated silicone elastomer.

  As a manufacturing condition of the mixing / stirring device, a device having a peripheral speed of 40 m / sec or less and a rotational speed of 1000 to 2000 ppm is required. For example, a normal Henschel mixer is suitable.

  The compounding device has a function that plate-like particles adhering to the surface of agglomerated silicone elastomer of several hundred μm tear the aggregated agglomerated silicone elastomer, and further can obtain a composite powder that is directly stuck into the silicone elastomer. It is necessary to have

  The composite device must have a peripheral speed of 70 m / sec or more and a function of a centrifugal effect of 2000 G or more, and further equipped with a cooling facility capable of cooling the heat generated by the energy generated during the manufacture of the composite device. In this embodiment, a high-speed Henschel mixer in which the function of the Henschel mixer is improved is used. This device has a maximum peripheral speed of 120 m / sec and a maximum centrifugal effect of 5000 G, and the processing amount at one time is 10 kg.

  If the high-speed Henschel mixer is used, not only the complexing apparatus but also a mixing / stirring apparatus can be used.

  The cooling device needs to have a function of cooling and recovering the combined processed product, which is a product, to room temperature. Furthermore, the cooling device preferably has a mixing / stirring and cooling function at a peripheral speed of 20 m / sec or less, and a device having such a function can also be used as a compounding device.

  In this embodiment, a high-speed Henschel mixer is used. However, this high-speed Henschel mixer is not particularly limited as long as it has a maximum peripheral speed of 120 m / sec and a maximum centrifugal effect of 5000 G and has a function of cooling the processed material. The shape of the high-speed Henschel mixer is a vertical cylindrical shape, a horizontal cylindrical shape, a spherical shape, or the like. Any shape may be used for the composite, but a vertical cylindrical shape, a spherical shape, or the like is suitable for taking out the product.

  EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited by this. The blending amounts are parts by weight and mass% unless otherwise specified.

Example 1: Production of synthetic phlogopite-silicone elastomer composite powder Synthetic phlogopite (PDM-5L (S) manufactured by Topy Industries, Ltd., average particle size of 5.0 to 8.5 µm, aspect ratio of 30 to 40) as plate-like particles ) 40 parts was used, and Toile Dow Corning Co., Ltd. Trefil E-506S, 60 parts was used as the silicone elastomer powder.

  These raw materials are weighed and put into a high-speed Henschel mixer. Cooling water is allowed to flow into the jacket portion of the apparatus, and is rotated for 3 minutes at a low speed of 40 m / sec.

  Subsequently, it was rotated at a high speed under the conditions of a peripheral speed of 92 m / sec and a centrifugal effect of 4,000 G, and processed for 60 minutes. At high speed rotation, the temperature of the treated powder rises rapidly and becomes constant at 60 ° C. after 5 minutes. After 60 minutes, the high-speed rotation was stopped and the rotation was performed at a low speed of 20 m / sec or less, and the composite was cooled to room temperature and collected. There was almost no deposit in the tank. The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 2: Manufacture of synthetic phlogopite-silicone elastomer composite powder Synthetic phlogopite (PDM-5L (S) manufactured by Topy Industries, Ltd., average particle size of 5.0 to 8.5 µm, aspect ratio of 30 to 40) as plate-like particles ) Manufactured in the same manner as in Example 1 except that 60 parts were used and 40 parts of Toray Fill E-506S manufactured by Toray Dow Corning Co., Ltd. was used as the silicone elastomer powder.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 3: Production of synthetic phlogopite-silicone elastomer composite powder 40 parts of synthetic phlogopite (PDM-10L (S) manufactured by Topy Industries, Ltd., average particle size of 10-13 μm, aspect ratio of 40-50) as plate-like particles It was manufactured in the same manner as in Example 1 except that 60 parts of Toray Dow Corning Corporation Trefil E-506S was used as the silicone elastomer powder.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 4: Production of synthetic phlogopite-silicone elastomer composite powder 60 parts of synthetic phlogopite (PDM-10L (S), average particle size 10-13 μm, aspect ratio 40-50, manufactured by Topy Industries, Ltd.) as plate-like particles were used. It was manufactured in the same manner as in Example 1 except that 40 parts of Toray Fill E-506S manufactured by Toray Dow Corning Co., Ltd. was used as the silicone elastomer powder.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 5: Manufacture of synthetic mica-silicone elastomer composite powder Silicone elastomer powder using 40 parts of synthetic mica (MK-100 manufactured by Coop Chemical Co., Ltd., average particle diameter of 3-5 μm, aspect ratio of 20-30) as plate-like particles. As in Example 1, except that 60 parts of Torefill E-506S manufactured by Toray Dow Corning Co., Ltd. was used.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 6 Production of Synthetic Mica-Silicone Elastomer Composite Powder Using 60 parts of synthetic mica (MK-100, average particle diameter 3-5 μm, aspect ratio 20-30) manufactured by Cope Chemical Co., Ltd. as a plate-like particle, silicone elastomer powder The Toray Dow Corning Co., Ltd. Trefil E-506S was used in the same manner as in Example 1 except that 40 parts were used.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 7 Production of Synthetic Mica-Silicone Elastomer Composite Powder Silicone elastomer powder using 40 parts of synthetic mica (MK-200, average particle diameter 5-8 μm, aspect ratio 20-30, manufactured by Coop Chemical Co., Ltd.) as plate-like particles. As in Example 1, except that 60 parts of Torefill E-506S manufactured by Toray Dow Corning Co., Ltd. was used.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 8 Production of Synthetic Mica-Silicone Elastomer Composite Powder Using 60 parts of synthetic mica (MK-200, average particle diameter of 5-8 μm, aspect ratio of 20-30, manufactured by Coop Chemical Co., Ltd.) as plate-like particles, silicone elastomer powder The Toray Dow Corning Co., Ltd. Trefil E-506S was used in the same manner as in Example 1 except that 40 parts were used.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Comparative Example 1: Production of Sericite-Silicone Elastomer Composite Powder 40 parts of sericite (FSE manufactured by Sanshin Mining Co., Ltd., average particle size 11.8 μm, aspect ratio 10-20) is used as the plate-like particles. Manufactured in the same manner as in Example 1 except that 60 parts of Trefil E-506S manufactured by Toray Dow Corning Co., Ltd. was used. Since the aspect ratio of sericite is not described in the characteristic value of Sanshin Mining Co., Ltd., it was calculated from the SEM photograph.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Comparative Example 2: Production of Sericite-Silicone Elastomer Composite Powder Using 60 parts of sericite (Sanshin Mining Co., Ltd. FSE, average particle size 11.8 μm, aspect ratio 10-20) as the plate-like particles, Manufactured in the same manner as in Example 1 except that 40 parts of Toray Fill E-506S manufactured by Toray Dow Corning Co., Ltd. was used. Since the aspect ratio of sericite is not described in the characteristic value of Sanshin Mining Co., Ltd., it was calculated from the SEM photograph.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 9: Production of synthetic phlogopite-silicone elastomer composite powder 40 parts of synthetic phlogopite (PDM-20L (S), average particle size 17-22 μm, aspect ratio 60-80) manufactured by Topy Industries, Ltd.) as plate-like particles. It was manufactured in the same manner as in Example 1 except that 60 parts of Toray Dow Corning Corporation Trefil E-506S was used as the silicone elastomer powder.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

Example 10: Production of synthetic phlogopite-silicone elastomer composite powder 60 parts of synthetic phlogopite (PDM-20L (S), average particle size 17-22 μm, aspect ratio 60-80) manufactured by Topy Industries, Ltd.) as plate-like particles. It was manufactured in the same manner as in Example 1 except that 40 parts of Toray Fill E-506S manufactured by Toray Dow Corning Co., Ltd. was used as the silicone elastomer powder.

  The composite state of the composite was observed with a scanning electron microscope, and the oil absorption measurement was evaluated.

  The composite state was observed with a scanning electron microscope. Whether the plate-like particles are composited with the silicone elastomer is divided into two states, a composite state A, and whether the plate-like particles are pierced radially into the silicone elastomer and composited. The state of each composite particle was evaluated in the following three stages, and the results are shown in Table 1.

[Evaluation criteria]
Compound state A (state evaluation of whether or not compounded)
A: The aggregation of the silicone elastomer is crushed to 2 to 20 μm, and the plate-like particles are almost uniformly coated with the silicone elastomer powder.
○: Aggregation of the silicone elastomer is crushed to 2 to 20 μm, and the plate-like particles are coated with the silicone elastomer powder.
Δ: Some of the silicone elastomer aggregates are crushed to 2 to 20 μm, but some silicone elastomer aggregates remain. The plate-like particles are coated with a silicone elastomer powder.
X: Aggregation of the silicone elastomer powder is hardly crushed. The plate-like particles are not coated with the silicone elastomer powder.

Compound state B (Evaluation of whether or not plate-like particles are compounded by piercing the silicone elastomer radially)
A: Almost all plate-like particles are composited by being pierced radially into the silicone elastomer.
A: Most plate-like particles are composited by being pierced radially into the silicone elastomer.
Δ: Some plate-like particles are composited by piercing the silicone elastomer radially, but some plate-like particles are not.
X: Plate-like particle | grains are not pierced radially by silicone elastomer.

  The scanning electron micrographs of Example 1 corresponding to the state of the composite powder by the scanning electron microscope (composite state A: A, composite state B: A) are shown in FIGS. Scanning electron micrographs of Example 5 corresponding to state A: ○ and composite state B: ○ are shown in FIGS. 3 and 4, and the state of the composite powder is (composite state A: ×, composite state B: ×). FIGS. 7 and 8 show the corresponding scanning electron micrographs of Comparative Example 2, and the scanning electron micrographs of Example 9 corresponding to the composite powder state (composite state A: Δ, composite state B: Δ). It shows in FIG. 5, FIG. 6, respectively.

(Manufacture of cosmetics)
Next, the present invention will be described in more detail with reference to prescription examples. In addition, this invention is not limited only to these prescription examples.

(Water-dried foundation)
As a formulation example, a water-drying combination foundation was prepared by blending the synthetic phlogopite-coated silicone elastomer obtained in Example 2.

  Among the following prescription ingredients, (1) to (7) were mixed with a Henschel mixer, then pulverized, mixed and dispersed, and the ingredients (8) to (12) were mixed by heating, dissolving and mixing, and then pulverized. The resulting mixture was placed in a tray and press molded.

  On the other hand, as a comparative formulation example, a silicic acid-coated sericite marketed as a powder having a soft focus effect was blended in place of the synthetic phlogopite-coated silicone elastomer component to produce a water-dried foundation.

(Loose-type funny)
As a prescription example, a loose-type mortar containing the synthetic phlogopite-coated silicone elastomer obtained in Example 2 was produced.

  The following prescription ingredients (1) to (7) were mixed with a Henschel mixer and then pulverized to produce a loose garnish.

  On the other hand, as a comparative formulation example, a loose-type mortar was produced by blending silicate-coated sericite usually used in place of the synthetic phlogopite-coated silicone elastomer component.

(Emulsification foundation)
As a formulation example, an emulsified foundation was prepared by blending the synthetic phlogopite-coated silicone elastomer obtained in Example 2.

  Among the following formulation components, (1) to (13) were heated and dissolved and mixed at 85 ° C, and a mixture obtained by heating and dissolving and mixing components (14) to (16) at 85 ° C was gradually added and emulsified. After stirring for 10 minutes while maintaining the temperature at the time of emulsification, the mixture was cooled by stirring and taken out at 30 ° C. and filled into a container to produce an emulsified foundation.

  On the other hand, as a comparative formulation example, an emulsified foundation was produced by blending commonly used anhydrous silicate-coated sericite instead of the synthetic phlogopite-coated silicone elastomer component.

[Practical evaluation of cosmetics]
(Practical property evaluation)
Samples were applied to 10 panelists specializing in sensory evaluation, and five-level sensory evaluations of 1 to 5 were conducted on the spread on the skin, adhesion, glare and shine, soft focus effect, finish feeling, and cosmetic comprehensiveness. The average value of all members was displayed with the following symbols.

(Evaluation criteria)
◎ ... 4.5-5.0
○ ... 3.5 to 4.4
Δ: 2.5 to 3.4
X ... 1.5 to 2.4
XX ... 1.0-1.4

[Material Evaluation]
(Blur effect)
The sample and clear lacquer are mixed in a ratio of 2: 8 and dispersed using sonic. Next, this dispersion is applied onto a glass plate with a doctor blade with a film thickness of 12.5 μm. A soft focus effect (blurring effect) was observed by placing a glass plate on the paper marked with a broken line. The results are shown in FIGS. It has been found that the synthetic phlogopite-coated silicone elastomer has a higher soft focus effect (blurring effect) than silicic acid-coated sericite.

  The silicone elastomer composite powder of the present invention can be suitably blended particularly in cosmetics, but is not limited thereto, and can be applied to any application as long as it requires a high oil absorption powder. .

It is a scanning electron micrograph of Example 1 of silicone elastomer composite powder. It is a scanning electron micrograph of Example 1 of silicone elastomer composite powder. It is a scanning electron micrograph of Example 5 of silicone elastomer composite powder. It is a scanning electron micrograph of Example 5 of silicone elastomer composite powder. It is a scanning electron micrograph of Example 9 of silicone elastomer composite powder. It is a scanning electron micrograph of Example 9 of silicone elastomer composite powder. It is a scanning electron micrograph of the comparative example 2 of silicone elastomer composite powder. It is a scanning electron micrograph of the comparative example 2 of silicone elastomer composite powder. It is a figure which shows the observation state of the soft focus effect (blurring effect) at the time of using a silicic-acid-coated sericite. It is a figure which shows the observation state of the soft focus effect (blur effect) at the time of using a synthetic phlogopite covering silicone elastomer.

Claims (2)

Cover the surface of the silicone elastomer powder in a state where the plate-like particles are radially injected,
The silicone elastomer powder is a silicone elastomer composite powder having a JIS hardness of less than 90,
Ri der oil absorption of 200 g / 100 g or more of the silicone elastomer composite powder,
The plate-like particles, mica, synthetic mica, mica, and at least one of titanium mica and synthetic mica, silicone elastomer composite powder aspect ratio of the plate-like particles, wherein 20 to 80 der Rukoto .   A cosmetic comprising the silicone elastomer composite powder according to claim 1.