JPH0930918A - Composite powder and cosmetic compounded with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain composite powder excellent in touch and cosmetic effect durability, and to obtain a cosmetic compounded the composite powder. SOLUTION: Composite powder is obtained by wet-grinding in a volatile solvent a powder mixture comprising (A) 10-60wt.% of polymer powder having an average primary particle diameter of 0.1-20μm, (B) 10-80wt.% of fine particle powder having an average primary particle diameter of 1-100nm, and (C) 10-40wt.% of one or more kinds of powder selected from titanium dioxide, bar-like titanium dioxide, plate-like titanium dioxide, a titanate, zinc oxide, plate-like barium sulfate and a clay mineral and having a larger particle diameter than the particle diameter of the fine particle powder of the component (B), and subsequently removing the volatile solvent from the ground solution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite powder having excellent feel and durability of cosmetic effect and a cosmetic composition containing the same. More specifically, specific polymer powder, fine particle powder,
The present invention relates to a cosmetic having excellent feel and long-lasting cosmetic effect by blending a soft agglomerate composed of another powder and a composite powder that is a soft agglomerate.

[0002]

2. Description of the Related Art
Fine particle powders such as fine particle iron oxide and fine particle titanium oxide are used as an ultraviolet protection agent in sunscreen agents and the like. On the other hand, these fine particle powders are disclosed in Japanese Patent Application No.
As disclosed in Japanese Patent Laid-Open No. 225544, since it has strong adhesion to the skin, it can be expected to improve the durability of makeup. However, the fine particle powder has strong agglomeration and hard agglomerates are often generated, which deteriorates the feeling such as roughness and lacks the spread peculiar to the fine particle powder. There was a problem that it was difficult to make adjustments in terms of aspects.

In view of this problem, the present inventor has made diligent efforts and, as a result, made a fine-grain powder together with other powders into a soft agglomerate to obtain a composite powder having an improved feeling surface of the fine-particle powder. ,
It has been found that by blending this with a cosmetic, a cosmetic that is smooth and spreads well and has excellent makeup sustainability can be obtained. That is, it is an object of the present invention to provide a powder and a cosmetic having excellent feel and long-lasting makeup.

[0004]

The object of the present invention is as follows: (A) a polymer powder having an average primary particle diameter of 0.1 to 20 μm;
10 to 60% by weight (B) Fine particle powder having an average primary particle diameter of 1 to 100 nm, 1
0-80% by weight (C) titanium oxide, rod-shaped titanium oxide, plate-shaped titanium oxide,
Powders of one or more kinds selected from titanate, zinc oxide, plate-shaped barium sulfate and clay mineral, having a particle size larger than that of the fine particle powder of (B), 10-4
It is achieved by compounding a powder mixture containing 0% by weight in a volatile solvent by wet grinding in a volatile solvent to obtain a composite powder obtained by removing the volatile solvent and a composite powder thus obtained. .

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The polymer powder used in the present invention is
The average primary particle diameter is 0.1 as observed by an electron microscope.
It is a polymer powder in the range of ˜20 μm, and the particle size distribution may be narrow or wide. Further, the shape includes spherical, irregular shape, lump, plate, needle, etc.,
Spherical or spherical aggregates are preferable because they have a high effect of improving the feel. As the average primary particle diameter of the polymer powder,
If it is less than 0.1 μm, it is difficult to obtain industrially, and it is 20
If it exceeds μm, the adhesion to the skin will be poor, so it is necessary to use those having the above particle size range.

As the polymer powder, there is no problem as long as it is a resin conventionally used in cosmetics. For example, silicone resin, nylon, polyethylene, polypropylene, polycarbonate, polystyrene, Teflon, acrylic, urethane, polymethylmethacrylate, poly Acrylonitrile, starch, cellulose, silk, chitin, chitosan,
Examples of the material include cotton and polyvinyl alcohol, but silicone resin, Teflon, nylon, polyethylene, and urethane, which have a high ability to adjust the feel, are preferable.

Among these polymer powders, the trefil series manufactured by Toray Dow Corning Silicone Co., which is a silicone type resin, is most preferable for obtaining the effect of the present invention. Further, when using a powder which is difficult to be crushed as in the trefill series, it is preferable to perform wet crushing in advance. Especially when these silicone resins are used, it is preferable to grind in a silicone solvent such as cyclic silicone which is a volatile solvent.

The fine particle powder used in the present invention has an average primary particle diameter of 1 to 100 nm as observed by an electron microscope.
Fine particles in the range of, the shape is spherical,
Examples thereof include irregular shapes, lump shapes, and needle shapes, but are not particularly limited. If the average primary particle size of the fine particle powder is less than 1 nm, it is difficult to obtain industrially. On the other hand, if it exceeds 100 nm, the UV protection effect is lost and the durability of the cosmetic effect, which is the object of the present application, is reduced. It is necessary to select a fine particle powder having a particle diameter within the range.

Examples of the fine particle powder of the present invention include iron oxide (yellow iron oxide, red iron oxide, black iron oxide), titanium oxide,
Low order titanium oxide, zinc oxide, aluminum oxide, silicon oxide (silicic anhydride), zirconium oxide, cerium oxide,
Examples include gold, silicon carbide, organic dyes, ultramarine blue, navy blue, and carbon black. The crystal form of these fine particle powders is not particularly limited.

As a method for producing these fine particle powders,
If the gas phase method is possible, the gas phase method is preferable because the cohesive force between the powders is weak.

In the present invention, in addition to the above-mentioned fine particle powder, titanium oxide, rod-shaped titanium oxide, plate-shaped titanium oxide, titanate, zinc oxide, plate having a normal particle size larger than the particle size of the fine particle powder. At least one powder selected from barium sulfate and clay minerals is used. These powders are suitable for controlling the hiding power and the cohesiveness of the powder, and particularly rod-shaped titanium oxide is preferable because a high hiding power can be expected with a small amount.

These various powders may or may not be surface-treated. As surface treatment, metal soap treatment, silicone treatment, oil agent treatment, fluorine compound treatment,
Alkylsilane treatment, silane coupling agent treatment, titanium coupling agent treatment, polymer treatment, amino acid treatment, N
-Treatment with an acylated lysine and the like can be mentioned, but the treatment is not particularly limited.

Further, in the present invention, the above (A) to
By mixing the powder mixture of (C) together with an oil agent, the cohesive force of the obtained composite powder is weakened and a more excellent soft agglomerate can be produced. It is preferable to manufacture. The oil agent used here may be any oil agent conventionally used in cosmetic applications, for example, stearyl alcohol, cetyl alcohol, isostearyl alcohol, lauryl alcohol,
Hexadecyl alcohol, higher alcohols such as octyldodecanol, glycerin, polyethylene glycol,
Polyhydric alcohols such as 1,3-butanediol, propylene glycol, and malbitol, fatty acids such as isostearic acid, stearic acid, undecylenic acid, and oleic acid, myristyl myristate, hexyl laurate, decyl oleate, isopropyl myristate, palmitic acid Esters such as isopropyl, hexyldecyl dimethyloctanoate, glyceryl monostearate, diethyl phthalate, ethylene glycol monostearate, octyl oxystearate, etc., hydrocarbons such as liquid paraffin, petrolatum, squalane, lanolin, reduced lanolin, carnauba wax, etc. Wax, mink oil, cocoa butter, coconut oil, palm kernel oil, camellia oil, sesame oil, castor oil, olive oil, and other oils, ethylene / α-olefin / co-oligomers, liquid isoparaffin, paraffin Fins, deoxyribonucleic acid, alginic acid, dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, biphenylpolysiloxane, polyether-modified organopolysiloxane, perfluoroalkyl / polyoxyalkylene co-modified organopolysiloxane, alkylpolyether Modified Silicone, Sugar Modified Silicone, Polyhydric Alcohol Modified Silicone, Alkyl Modified Organopolysiloxane, Modified Organopolysiloxane (However, the position of the Substituent may be Side Chain or Terminal), Fluorine Modified Organopolysiloxane, Amodimethicone, Amino Modified Silicone such as organopolysiloxane, fluorine-modified silicone resin, acrylic silicone, trimethylsiloxysilicic acid, silicone gel, silicone RTV rubber Examples thereof include corn compounds, organic ultraviolet absorbers, perfluoropolyethers, fluorinated pitches, fluorocarbons, fluoroalcohols, and fluorine compounds such as perfluoroalkyl phosphate ester salts.

As the volatile solvent used in the present invention, cyclic silicone, volatile linear silicone, lower liquid isoparaffin, methylene chloride, fluorocarbon, hexane, cyclohexane, ether, toluene, xylene,
Benzene, terpenes, water, 1,3-butanediol,
Examples thereof include ethanol, methanol, propanol, isopropanol, butanol and the like.

The pulverization method used in the present invention is wet pulverization in which a medium is used in a volatile solvent. Examples of the wet crushing device include, but are not limited to, Micros, Dynomill, Ongmill, paint conditioner, sand mill, ball mill, homomixer, attritor, etc., but a device having strong crushing power is used. It is preferable.

The volatile solvent used in the present invention is preferably removed by heating, drying under reduced pressure, freeze-drying, centrifugation, filtration and a combination thereof. When heating is performed, it is preferable to carry out the heating in the range of 70 to 180 ° C. in consideration of the alteration of the oil agent or powder. Incidentally, the reaction of the functional group in the oil agent may occur with the oil agent and the powder within this drying time.

In the present invention, the blending amount of the various powders (A) to (C) needs to be appropriately selected within the above range, and if the blending amount of the polymer powder is less than 10% by weight, the feeling improving effect is obtained. If it exceeds 60% by weight, it will be too slippery and there will be a problem of no rest. If the content of the fine particle powder is less than 10% by weight, the coloring power and functionality are insufficient, and if it exceeds 80% by weight, there is a problem that the stopping is too strong and the smoothness is lost. 10% by weight of powdered titanium oxide
When it is less than 40%, there is a problem that the hiding power and the cohesiveness of the powder are not well controlled, and when it exceeds 40% by weight, there is a problem that it is difficult to utilize the characteristics of the fine particle powder. When an oil agent is used in combination, the amount of the oil agent is preferably in the range of 0.5 to 20% by weight based on the total amount of the oil agent and the powder, and when less than 0.5% by weight, It is difficult to exert the effect of the oil agent, and when it exceeds 20% by weight, there is a problem that the powder agglomerates excessively.

The amount of the volatile solvent used in the present invention varies greatly depending on the oil absorption amount of the powder, but is preferably 0.7 to 15 times the total amount of the powder and the oil agent.

When the composite powder of the present invention is added to cosmetics, powders, oils, resins, etc., which have been conventionally used in cosmetics,
Surfactants, ultraviolet absorbers, fragrances, preservatives, bactericides, moisturizers, viscous agents, physiologically active ingredients, solvents, salts, water and the like can be added at the same time.

The ratio of the composite powder of the present invention to be blended into cosmetics is preferably 1 to 100 parts by weight, more preferably 10 to 100 parts by weight, based on 100 parts by weight of the cosmetics, from the viewpoint of effective effects.

Examples of powders other than the powders used in the present invention include Red No. 104, Red No. 201, and Red 226.
No. 4, Yellow No. 4, Blue No. 1, Black No. 401, Yellow No. 4 Al
Lake, yellow dye such as No. 203 Al lake, nylon powder, silk powder, urethane powder, Teflon powder, silicone powder, cellulose powder,
Polymers such as N-acylated lysine, yellow iron oxide, red iron oxide, black iron oxide, chromium oxide, carbon black, ultramarine blue,
Colored pigments such as navy blue, white pigments such as zinc oxide, titanium oxide and cerium oxide, body pigments such as talc, mica, sericite and kaolin, pearl pigments such as titanium mica, barium sulfate, calcium carbonate, magnesium carbonate and aluminum silicate. , Metal salts such as magnesium silicate, inorganic powders such as silica and alumina, particulate titanium oxide, particulate zinc oxide,
Examples thereof include fine particle iron oxide, alumina-treated fine particle titanium oxide, silica-treated fine particle titanium oxide, bentonite, and smectite. There is no particular limitation on the shape of these powders.

These powders are prepared by the conventional surface treatment,
For example, fluorine compound treatment, silicone treatment, pendant treatment, silane coupling agent treatment, titanium coupling agent treatment, oil agent treatment, N-acylated lysine treatment, polyacrylic acid treatment, metal soap treatment, amino acid treatment, inorganic compound treatment, plasma It may or may not be surface-treated in advance by treatment, mechanochemical treatment or the like.

Examples of the fluorine compound treatment include perfluoroalkyl phosphate ester and its salt, surface treatment using perfluoroalkylsilane, Teflon, perfluoroalkylcarboxylic acid, metal soap treatment, surface fluorination treatment by plasma, Examples include mechanochemical composite treatment with Teflon.

Examples of the cosmetics of the present invention include oily foundation, emulsified foundation, water foundation, dual-use foundation, white powder, blusher, pressed powder, cheek color, undercover, lipstick, lip coat, eye shadow, eye liner. , Nail color, makeup base, emulsion, lotion, cream, sunscreen, hand lotion, conditioner, shampoo, dry shampoo, conditioner, hair liquid, hair treatment, cuticle coat,
Examples include setting agents, perfumes, deodorant agents, cleansing agents, face soaps, soaps and the like.

[0025]

The present invention will be described in detail below with reference to examples and comparative examples.

The evaluation test methods for the composite powders and cosmetics of Examples and Comparative Examples are shown below.

(Powder Characteristic Test) The feel (dry feeling, smoothness) at the time of application to the skin and the difficulty (persistence) of the applied powder were evaluated by 10 expert inspectors. In addition, the judgment was evaluated as follows by the number of people who answered that each evaluation item was good. 7 or more were evaluated as ◯, 4 to 6 were evaluated as Δ, and 3 or less were evaluated as x.

(Cosmetic Evaluation Test) Various characteristics of cosmetics at the time of application to the skin (4 items of good elongation, good stickiness, cosmetic effect, and lasting cosmetic effect) were evaluated from practical test results by 20 panelists. . The evaluation method was a five-level evaluation (5: good, 4: somewhat good, 3: normal, 2: slightly bad, 1: bad), and the average value was taken.

Example 1, Composite Powder As the polymer powder, “Trefil 505C” type manufactured by Toray Dow Corning Silicone was used. This product has a wide particle size distribution and its average primary particle size is several μ.
m, which corresponds to the particle size range of the present invention. Torefil 505C type 12.5 parts by weight to which 75 parts by weight of a volatile solvent cyclic silicone (decamethylcyclopentasiloxane, hereinafter referred to as D5) was added, and after coarse stirring, a wet ultrafine pulverizer manufactured by Nara Machinery Co., Ltd. Finely pulverized with a "s". Then, trefil 505 was added to this grinding solution.
After adding 12.5 parts by weight of C type and roughly stirring, pulverization was similarly performed to obtain a pulverized solution A. On the other hand, 40 parts by weight of ultrafine red iron oxide (amorphous type, average primary particle size 8 nm), rod-shaped titanium oxide manufactured by Ishihara Sangyo (FTL-110, minor axis 0.0)
7 μm, major axis 3 μm) 20 parts by weight, the above pulverized solution A16
600 parts by weight of cyclic silicone (pentamethylcyclotetrasiloxane, hereinafter referred to as D4) was added to 0 parts by weight, and the mixture was pulverized with a paint shaker for 2 hours. The obtained pulverized solution (slurry) was dried under reduced pressure and then dried at 100 ° C. for 3 hours. Then, the obtained powder was roughly pulverized with a mixer to obtain a target composite powder.

FIG. 1 shows an example of a scanning electron micrograph of the composite powder of Example 1. It can be clearly seen that the above components are combined.

Example 2, composite powder A composite powder was prepared in the same manner as in Example 1 except that ultrafine iron oxide yellow (amorphous type, average primary particle diameter 9 nm) was used in place of the ultrafine red iron oxide in Example 1. Got the body

Example 3, Composite Powder A composite powder was obtained in the same manner as in Example 1 except that fine particle low-order titanium oxide (average primary particle diameter 20 nm) was used in place of the ultrafine particle red iron oxide of Example 1. It was

Example 4, Composite Powder As the polymer powder, “Trefil 506C” type manufactured by Toray Dow Corning Silicone was used. This product has a wide particle size distribution and its average primary particle size is several μ.
m, which corresponds to the particle size range of the present invention. 75 parts by weight of cyclic silicone (D5) was added to 12.5 parts by weight of trefil 506C type, and after coarsely stirring, finely pulverized with a wet ultrafine pulverizer "Micros" manufactured by Nara Machinery Co., Ltd. Then add trefil 506C type 1 to this solution.
After 2.5 parts by weight was added and the mixture was roughly stirred, fine pulverization was performed in the same manner to obtain a pulverized solution B. On the other hand, 40 parts by weight of finely crushed dark blue (average primary particle size 20 nm), 20 parts by weight of rod-shaped titanium oxide (FTL-110) manufactured by Ishihara Sangyo, 160 parts by weight of grinding solution B, perfluoroalkyl / polyoxyalkylene co-modified silicone as an oil agent 600 parts by weight of cyclic silicone (D4) was added to 10 parts by weight, and the mixture was pulverized with a paint shaker for 2 hours. The obtained pulverized solution (slurry) was dried under reduced pressure and then dried at 100 ° C. for 3 hours. Then, the obtained powder was roughly pulverized with a mixer to obtain a target composite powder.

Comparative Example 1, mixed powder The same trefil 505C, 4 used in Example 1
0 parts by weight, 40 parts by weight of ultrafine red iron oxide, and 20 parts by weight of rod-shaped titanium oxide were pulverized with a mixer to obtain a mixed powder of a comparative example.

Comparative Example 2, mixed powder The same trefil 505C and 4 used in Example 1
0 parts by weight, 40 parts by weight of ultrafine red iron oxide, and 20 parts by weight of rod-shaped titanium oxide were pulverized by using a ladle machine to obtain a mixed powder of a comparative example.

Comparative Example 3, Powder The ultra-fine red iron oxide itself used in Example 1 was used as a comparative example.

Comparative Example 4, Powder The rod-shaped titanium oxide itself used in Example 1 was used as a comparative example.

Example 5, Eye Shadow An eye shadow was prepared according to the formulation shown in Table 1. The unit of the compounding amount is% by weight. (The same shall apply hereinafter.)

[0039]

[Table 1]

After mixing and pulverizing the powder components with a mixer,
A liquid component was added and further mixed and pulverized. Then, the product was obtained by stamping on a metal plate using the metal mold.

Example 6, Eye Shadow An eye shadow was prepared in the same manner as in Example 5 except that the composite powder (Example 1) of Example 5 was replaced with the composite powder (Example 4).

Comparative Example 5, Eye Shadow An eye shadow was prepared in the same manner as in Example 5, except that the composite powder (Example 1) of Example 5 was replaced with the mixed powder (Comparative Example 1).

Comparative Example 6, Eye Shadow An eye shadow was prepared in the same manner as in Example 5 except that the composite powder (Example 1) of Example 5 was replaced with the mixed powder (Comparative Example 2).

Comparative Example 7, Eye Shadow An eye shadow was prepared according to the formulation shown in Table 2.

[0045]

[Table 2]

After mixing and pulverizing the powder components with a mixer,
A liquid component was added and further mixed and pulverized. Then, the product was obtained by stamping on a metal plate using the metal mold.

Comparative Example 8, Eye Shadow An eye shadow was prepared according to the formulation shown in Table 3.

[0048]

[Table 3]

After mixing and pulverizing the powder components with a mixer,
A liquid component was added and further mixed and pulverized. Then, the product was obtained by stamping on a metal plate using the metal mold.

Example 7, Foundation A foundation was prepared according to the formulation shown in Table 4.

[0051]

[Table 4]

After mixing and pulverizing the powder components with a mixer,
A liquid component was added and further mixed and pulverized. Then, the product was obtained by stamping on a metal plate using the metal mold.

Comparative Example 9, Foundation A foundation was prepared according to the formulation shown in Table 5. still,
As the mixed powder 2, an ultrafine yellow iron oxide was used in place of the ultrafine red iron oxide in Comparative Example 1, and as the mixed powder 3, a fine low order titanium oxide was similarly used.

[0054]

[Table 5]

After mixing and pulverizing the powder components with a mixer,
A liquid component was added and further mixed and pulverized. Then, the product was obtained by stamping on a metal plate using the metal mold.

Table 6 shows the evaluation results of the powders produced in the examples of the present invention and the comparative examples. In addition, Table 7 shows the evaluation results of the cosmetics produced in Examples of the present invention and Comparative Examples.

[0057]

[Table 6]

[0058]

[Table 7]

From the results shown in Table 6, it can be seen that the composite powder of the present invention has a better feel and is less likely to fall than the powder of the comparative example.

From the results shown in Table 7, the cosmetics of the present invention show higher values in each of the evaluation items than the comparative examples. Therefore, the elongation and stickiness are good, and the cosmetic effect and the makeup lasting property are excellent. I understand.

[0061]

From the above, it is clear that the present invention provides a composite powder and a cosmetic which are excellent in touch and durability of cosmetic effect.

[Brief description of drawings]

FIG. 1 is a scanning electron micrograph of the composite powder obtained in Example 1 of the present invention.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C08K 3/22 KAE C08K 3/22 KAE C08L 101/00 C08L 101/00 (72) Inventor Takeshi Higuchi 5-3 28, Kotobuki-cho, Odawara-shi, Kanagawa Kanebo Co., Ltd.

Claims (2)

[Claims] 1. (A) Polymer powder having an average primary particle diameter of 0.1 to 20 μm, 10 to 60% by weight (B) Fine particle powder having an average primary particle diameter of 1 to 100 nm, 1
0-80% by weight (C) titanium oxide, rod-shaped titanium oxide, plate-shaped titanium oxide,
Powders of one or more kinds selected from titanate, zinc oxide, plate-shaped barium sulfate and clay mineral, having a particle size larger than that of the fine particle powder of (B), 10-4
A composite powder obtained by removing a volatile solvent from a grinding solution obtained by wet-milling a powder mixture containing 0% by weight in a volatile solvent. 2. A cosmetic containing the composite powder according to claim 1.