JP4417079B2 - Pigment composite particles - Google Patents

Description

  The present invention relates to pigment composite particles useful for cosmetics and the like, a process for producing the same, and a cosmetic containing the same.

  As a powder used in cosmetics, Patent Document 1 discloses a composite powder obtained by coating a hollow sphere resin powder such as a hollow sphere styrene-acrylic copolymer resin on the surface of a flaky powder such as titanium mica. ing. Since such a composite powder is plate-shaped, it easily adheres to the part of the skin and can effectively cover defects such as stains and freckles, but it has the feature that it does not easily enter pores and skin grooves. Among the skin defects, it is not effective for the cover of the recess.

Patent Document 2 discloses a liquid cosmetic containing a spherical powder having an average particle diameter of 5 to 30 μm and a spherical powder having an average particle diameter of more than 0.1 μm and not more than 1 μm. Here, as a spherical powder with an average particle size of 5 to 30 μm, silica, titanium oxide, polyamide resin, silicone resin or a composite thereof is used to cover skin defects, and further, a white pigment with a high refractive index. The resin particles are combined to make the concave portions appear bright, thereby covering the skin defects.
JP-A-11-92688 JP 10-338616 A

  The problem of the present invention is that it has good adhesion to the skin, can penetrate into the skin recesses such as pores, skin grooves, etc., and can cover the defects of the skin recesses, and also make the skin tone lighter skin color It is to provide a pigment composite particle, a production method thereof, and a cosmetic.

  The present invention provides a pigment composite particle comprising a colored pigment comprising at least one kind of pigment and a thermoplastic resin, and a cosmetic containing the same.

  In the present invention, a thermoplastic resin, a colored pigment and, if necessary, an oil agent are mixed at a temperature equal to or higher than the softening temperature (or melting point) of the thermoplastic resin, and the obtained hot melt kneaded material is sprayed into a refrigerant. A method for producing pigment composite particles that are cooled and solidified, and a thermoplastic resin, a colored pigment, and a low-molecular compound having a melting point lower than the softening temperature (or melting point) of the resin at a temperature equal to or higher than the softening temperature (or melting point) of the resin. Then, the mixture is sprayed in a refrigerant, and the low molecular weight compound is removed from the resulting particles to make the porous structure, thereby providing a method for producing pigment-composited porous particles.

  The pigment composite particles of the present invention have good adhesion to the skin, can penetrate into the skin recesses such as pores and skin grooves, cover the defects of the skin recesses, and further brighten the skin tone Can be skin tone.

[Pigment composite particles]
The content of the colored pigment in the pigment composite particles of the present invention is not particularly limited, but is preferably 1 to 200 parts by weight, more preferably 10 to 150 parts by weight, and more preferably 30 to 90 parts with respect to 100 parts by weight of the thermoplastic resin. Part by mass is particularly preferred.

  The average particle diameter of the pigment composite particles of the present invention is preferably from 0.1 to 100 μm, and more preferably from 1 to 50 μm, from the viewpoint of obtaining a good feel without feeling of roughness or squeak.

  This average particle diameter is a weight average particle diameter measured at room temperature (20 ° C.) using a laser diffraction particle size distribution analyzer (LS-230, manufactured by Coulter, Inc.) (relative refractive index). 1.2 was used).

  The shape of the pigment composite particles of the present invention is not particularly limited, but a spherical body is preferable because it feels good on the skin.

The pigment composite particles of the present invention are preferably porous, and the pore surface area of the porous particles is a value determined by a mercury intrusion method to be described later, preferably 10 to 300 m ² / g, 100 m ² / g is more preferable, and 20 to 80 m ² / g is particularly preferable.

  In addition, the pigment composite particles of the present invention may further contain an oil agent, and when the oil agent is contained, the pigment composite particles also function as an oil agent release agent.

  The content of the oil agent in the pigment composite particles of the present invention is preferably 10 to 1,000 parts by mass and more preferably 100 to 900 parts by mass with respect to 100 parts by mass of the thermoplastic resin.

[Colored pigments]
In the present invention, the colored pigment refers to a pigment that is not an achromatic color, and in the Munsell color system, which is a color display system, a colored pigment having a chroma C of 1.0 or more, more preferably 2.0 or more is preferable.

  The colored pigment of the present invention comprises at least one kind of pigment, and even when a part of the pigment constituting the colored pigment is achromatic, when two or more kinds of pigments are mixed to form a toned pigment, If it becomes, it will be included in the colored pigment of this invention.

  The pigment used in the present invention may be either an inorganic pigment or an organic pigment. Specifically, yellow iron oxide, bengara, ultramarine, gunjo violet, bitumen, chromium oxide, chromium hydroxide, manganese violet, titanium yellow, Inorganic pigments such as lithium cobalt titanate, cobalt aluminum hydroxide, black iron oxide, carbon black, titanium oxide, zinc oxide, talc, kaolin, mica, calcium carbonate, magnesium carbonate; specified as Ordinance by the Ministry of Health, Labor and Welfare Legal dyes: Highly bright pigments such as mica titanium, yellow iron oxide-treated mica titanium, carmine-coated mica titanium, Bengala-coated mica titanium, and bitumen-coated mica titanium; fluorescent pigments, fluorescent dyes, and the like.

[Thermoplastic resin]
The thermoplastic resin used in the present invention is not particularly limited, but a crystalline thermoplastic resin is preferable when the composite particles of the present invention are porous. All of the crystalline thermoplastic resins may have crystallinity, or only a part of the thermoplastic resin may have crystallinity. The crystallinity of the crystalline thermoplastic resin is preferably 70% or more, more preferably 75% or more, and particularly preferably 80% or more. The upper limit is preferably 95% or less in view of easy availability of the material. The degree of crystallinity can be determined by the X-ray diffraction method under the following measurement conditions.

<Measurement conditions of X-ray diffraction method>
Device name: RINT2500, manufactured by Rigaku Corporation
Radiation source: Cu
Tube current: 300mA
Tube voltage: 50 kV
Scan speed: 2 ° / min
The molecular weight of the thermoplastic resin is preferably a molecular weight of 500 to 20,000, preferably 1,000 to 10,000, from the viewpoint that the melted viscosity in the composite particle production method described later is preferably 600 mPa · s or less. Is more preferred. The molecular weight of the thermoplastic resin can be determined by a viscosity method.

  The melting point (or softening temperature) of the thermoplastic resin is preferably 80 ° C. or higher, more preferably 100 ° C. or higher, and particularly preferably 120 ° C. or higher, from the viewpoint of ease of producing composite particles. Although an upper limit is not specifically limited, 200 degreeC or less is preferable from the ease of manufacture. The melting point of the thermoplastic resin can be measured according to JIS K0064: 1992.

  As a thermoplastic resin used for this invention, 1 or more types chosen from polyolefin resin, polyamide, polyester, or polyacetal is mentioned preferably.

  Examples of the polyolefin resin include olefin homopolymers such as polyethylene, polypropylene, poly-1-butene, polymethylpentene, polymethylbutene, and polybutadiene, and olefin copolymers such as propylene / ethylene random copolymer. A polyolefin having a fluorine atom such as polytetrafluoroethylene (PTFE) can also be used. Among these polyolefin resins, polyethylene, polypropylene, and poly-1-butene are particularly preferable.

As polyamide, nylon-6, nylon-66, nylon-10, nylon-12,
Examples thereof include aliphatic polyamides such as nylon-46, aromatic polyamides produced from aromatic dicarboxylic acids and aliphatic diamines, and nylon-6 is particularly preferable.

  Examples of the polyester include aromatic polyesters such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate, polycaprolactone, and polyhydroxybutyrate. Polyethylene terephthalate is particularly preferable.

  Examples of the polyacetal include polyformaldehyde (polyoxymethylene), polyacetaldehyde, polypropionaldehyde, polybutyraldehyde and the like, and polyformaldehyde is particularly preferable.

The thermoplastic resins as described above may be used alone or in combination of two or more.
Of these thermoplastic resins, polyolefin resins, particularly polyethylene and polypropylene are preferred. The polyolefin resin is preferably linear.

[Production method of pigment composite particles]
The production method of the pigment composite particles of the present invention is preferably a spray cooling method. When the composite particles are not porous, the following production method 1 is used. When the composite particles of the present invention are porous, the following methods are used. It can be produced by production method 2.

<Production method 1>
In production method 1, a thermoplastic resin, a colored pigment and, if necessary, an oil agent are mixed at a temperature equal to or higher than the softening temperature (or melting point) of the thermoplastic resin, and the obtained hot melt kneaded material is sprayed into a refrigerant to be cooled and solidified. It is a method to do.

  In the production method 1, first, a thermoplastic resin and a colored pigment, and if necessary, an oil agent are heated and kneaded at a temperature equal to or higher than the softening temperature (or melting point) of the thermoplastic resin. At this time, the blending ratio of the thermoplastic resin and the colored pigment is preferably 1 to 200 parts by mass, more preferably 10 to 150 parts by mass, and particularly preferably 30 to 90 parts by mass with respect to 100 parts by mass of the thermoplastic resin. In order to obtain a good color, it is desirable that the heat-kneading is performed so that the colored pigment is dispersed in the thermoplastic resin in a state close to the primary particles. Examples of the equipment used for kneading include a plast mill, a planetary, a roll mill, a kneader, and an extruder.

Next, the hot melt kneaded product is sprayed into a refrigerant preferably at 5 to 50 ° C. using a rotating disk atomizer, one fluid, or a plurality of fluid nozzles of two or more fluids, cooled and solidified, and combined. Collect the particles. Preferably, a multi-fluid nozzle of two or more fluids is used and sprayed into the refrigerant together with the compressed gas. As the refrigerant, a gas phase is particularly preferable. The compressed gas used as the fluid is preferably 9.8 × 10 ⁴ Pa or more, more preferably 9.8 × 10 ^{4 to} 29.4 × 10 ⁴ Pa of compressed air or compressed nitrogen. It is preferable to use a gas heated to a spraying temperature or higher because it can prevent clogging due to cooling at the nozzle part and continuously produce particles.

  From the viewpoint of obtaining good sprayability, the spray temperature is preferably 600 mPa · s or less, more preferably 300 mPa · s or less, and particularly preferably 100 mPa · s or less, of the hot-melt kneaded material containing the thermoplastic resin and the colored pigment. It becomes the temperature to become. Although there is no lower limit in particular, the temperature which becomes 5 mPa * s or more is preferable.

<Production method 2>
In the production method 2, a thermoplastic resin, a colored pigment, and a low-molecular compound having a melting point lower than the softening temperature (or melting point) of the resin are preferably at or above the softening temperature (or melting point) of the resin. From this point, after mixing at a temperature of 200 ° C. or less, the mixture is sprayed into a refrigerant, and the low molecular weight compound is removed from the obtained particles.

  Specifically, first, a thermoplastic resin and a low molecular compound having a melting point lower than the softening temperature (or melting point) of the resin are mixed at a temperature equal to or higher than the softening temperature (or melting point) of the resin. Subsequently, a colored pigment is mixed and uniformly mixed using a disperser such as a mortar or a three roll mill. The mixing ratio of the low molecular compound at this time is preferably 10 to 1,000 parts by mass, and 50 to 900 parts by mass with respect to 100 parts by mass of the thermoplastic resin from the viewpoint of obtaining porous particles having sufficient porosity. Is more preferable, and 100-900 mass parts is especially preferable. The mixing ratio of the colored pigment is preferably 1 to 200 parts by mass, more preferably 10 to 150 parts by mass, and particularly preferably 30 to 90 parts by mass with respect to 100 parts by mass of the thermoplastic resin. In addition, a surfactant, a silicone compound, an antioxidant and the like may be mixed.

  The low molecular weight compound used in the present invention is a compound having a molecular weight of preferably 50 to 1,000, and more preferably 100 to 500. This is because the low molecular compound has a melting point lower than the softening temperature (or melting point) of the thermoplastic resin, and the difference between the softening temperature (or melting point) of the thermoplastic resin and the melting point of the low molecular compound is From the standpoint of ease, it is preferably 10 ° C. or higher, more preferably 20 ° C. or higher, particularly preferably 30 ° C. or higher, and preferably 100 ° C. or lower. The low molecular weight compound is preferably hydrophobic because it is compatible with the thermoplastic resin. Hydrophobicity is the concept of organic-basics and applications-(by Yoshio Koda, Sankyo Publishing Co., Ltd., published on May 10, 1984), the ratio of inorganic (I) to organic (O) [I / O] is preferably 1.00 or less, and more preferably 0.50 or less.

  Examples of low molecular weight compounds used in the present invention include branched or straight chain higher alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, lanolin alcohol, hydrogenated lanolin alcohol, isostearyl alcohol, and cholesterol; myristic acid Branched chain or straight chain higher fatty acids such as palmitic acid, stearic acid, arachidonic acid; branched chain or straight chain alkyl ethers such as distearyl ether; hydrocarbon compounds such as paraffin, petrolatum, microcrystalline wax; Natural compounds such as squalene, mink oil, jojoba oil, carnauba wax, beeswax, candelilla wax, lanolin; myristyl myristate, myristyl stearate, isopropyl myristate, lanolin fatty acid a Ester compounds such as propyl, myristic myristate, octyldodecyl myristate, glyceryl trimyristate, cholesteryl isostearate; cyclic silicones such as octylmethylcyclotetrasiloxane and dodecamethylcyclohexasiloxane, dimethylpolysiloxane, methylphenylpolysiloxane, etc. Silicone such as chain silicone, amino modified silicone, polyether modified silicone, methylphenyl polysiloxane, fatty acid modified silicone, alcohol modified silicone, alkoxy modified silicone, epoxy modified silicone, fluorine modified silicone, cyclic silicone, alkyl modified silicone and derivatives thereof Etc.

The mixture is then sprayed into a coolant, preferably 5-50 ° C., using a rotating disk atomizer, one fluid, or multiple fluid nozzles of two or more fluids, cooled and solidified to recover the composite particles. To do. Preferably, a multi-fluid nozzle of two or more fluids is used and sprayed into the refrigerant together with the compressed gas. As the refrigerant, a gas phase is particularly preferable. The compressed gas used as the fluid is preferably 9.8 × 10 ⁴ Pa or more, more preferably 9.8 × 10 ^{4 to} 29.4 × 10 ⁴ Pa of compressed air or compressed nitrogen. It is preferable to use a gas heated to a spraying temperature or higher because it can prevent clogging due to cooling at the nozzle part and continuously produce particles.

  From the viewpoint of obtaining good sprayability, the spraying temperature is preferably 600 mPa · s or less, more preferably 300 mPa · s or less, and particularly preferably the viscosity of the melt-kneaded product containing the thermoplastic resin, the colored pigment and the low molecular weight compound. The temperature may be 100 mPa · s or less. There is no particular lower limit, but 5 mPa · s or more is preferable.

  Next, the low molecular compound is removed from the obtained particles. The removal of the low molecular compound is performed at a temperature lower than the softening temperature (or melting point) of the thermoplastic resin, preferably at a temperature of 20 ° C. or higher, more preferably at a temperature higher than the melting point of the low molecular compound. It is preferable to remove with a solvent. It may be removed by reducing the pressure.

  The solvent is preferably added in an amount of 1 to 100 parts by mass with respect to 1 part by mass of the obtained particles, mixed at a temperature lower than the softening temperature (or melting point) of the thermoplastic resin, and the low molecular compound is eluted. Such washing can be repeated to obtain porous particles.

  The solvent is not particularly limited as long as it dissolves the low molecular weight compound and does not dissolve the thermoplastic resin. For example, lower alcohols such as ethanol and isopropanol; lower ketone compounds; aliphatic hydrocarbons such as hexane, heptane, dodecane, cyclohexane, methylcyclohexane, isooctane, and hydrogenated triisobutylene; aromatic carbonization such as benzene, toluene, xylene, and ethylbenzene Examples thereof include hydrocarbon solvents such as hydrogen; silicone solvents such as octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane.

[Oil agent]
The composite particles of the present invention may contain an oil agent. The oil agent is preferably a liquid substance at room temperature (25 ° C.) having a melting point of 25 ° C. or lower in order to sufficiently function as a release material from the composite particles. The melting point of the oil is a value measured according to JIS K0064: 1992.

  Oils are moisturizers that have emollient or structural water retention on the skin, protective agents that act as protective films on the skin and hair, antioxidants, agents that strengthen and repair cuticles, cooling agents, antiperspirants Preferred examples include blood circulation promoters.

  Such compounds include those mentioned for the low molecular weight compounds, but are not limited to low molecular weights. Among these, natural compounds such as squalane and squalene; silicones such as cyclic silicones and derivatives thereof are particularly mentioned. In addition, vitamins such as vitamin A, vitamin E, panthenol, pantothenyl ethyl ether; ceramide and its similar structural substances (for example, described in JP-A-5-213731 as general formulas (1) and (2)) And the like) are preferred. The oil agent may be a mixture thereof.

  The oil agent can be used as an oil agent as it is without removing the low molecular weight compound from the thermoplastic resin in the production process of the composite particles. Furthermore, after producing the porous particles, the oil agent can be absorbed into the porous particles and contained.

[Cosmetics]
In the cosmetic of the present invention, the content of the pigment composite particles according to the present invention can be appropriately selected according to the purpose of the cosmetic, and is not particularly limited, but is 0.1 to 50 mass. %, And more preferably 1 to 30% by mass.

  The form of the cosmetic of the present invention is not particularly limited, and is a water-in-oil or oil-in-water emulsified cosmetic, oily cosmetic, spray cosmetic, stick cosmetic, aqueous cosmetic, sheet cosmetic, gel-like. Any of cosmetics and the like may be used. Also, the type of the cosmetic of the present invention is not particularly limited, for example, packs, foundations, lipsticks, lotions, cold creams, hand creams, skin cleansers, softening cosmetics, nutritional cosmetics, astringent cosmetics, whitening cosmetics, Skin cosmetics such as wrinkle improving cosmetics, anti-aging cosmetics, cleaning cosmetics, antiperspirants, deodorants, and hair cosmetics such as shampoos, rinses, treatments, hair styling agents, and hair nourishing agents.

  The cosmetic of the present invention preferably contains an alcohol. Examples of the alcohol include monohydric or polyhydric alcohols having 1 to 6 carbon atoms such as ethanol, glycerin, 1,3-butylene glycol, propylene glycol and sorbitol. Among these, monohydric alcohols, particularly ethanol is preferable. The blending amount of the alcohol is preferably 5 to 30% by mass in the cosmetic of the present invention, and particularly preferably 1 to 50 times by mass of the pigment composite particles according to the present invention.

  In the cosmetic of the present invention, other components generally used as cosmetic ingredients can be appropriately blended according to the form, type, etc. of the cosmetic as long as the effects of the present invention are not impaired. .

  Examples of such cosmetic ingredients include extender pigments such as mica, talc, sericite, kaolin, nylon powder, polymethylsilsesquioxane, and barium sulfate; solid pigments such as titanium oxide, zinc white, and iron oxide; these powders Powder treated with surface hydrophobic treatment such as silicone treatment, metal soap treatment, N-acyl glutamic acid treatment; hydrocarbons such as solid or liquid paraffin, microcrystalline wax, petrolatum, ceresin, ozokerite, montan wax; olives, Plant oils such as earth wax, carnauba wax, lanolin, whale wax, animal oils or waxes; stearic acid, palmitic acid, oleic acid, glycerol monostearate, glycerol distearate, glycerol monooleate, isopropyl myristine Acid ester, a Fatty acids such as propyl stearic acid ester and butyl stearic acid ester or esters thereof; higher alcohols such as cetyl alcohol, stearyl alcohol, palmityl alcohol, hexyl decyl alcohol; cationic cellulose, carboxybetaine type polymer, cationic silicone, etc. Adsorbing or thickening agents; polyhydric alcohols having moisturizing action such as glycol and sorbitol; emulsifiers for silicone oils such as polyether-modified silicone, polyether-alkyl-modified silicone, glyceryl ether-modified silicone; methylcellulose, ethylcellulose, carboxymethylcellulose , Polyacrylic acid, tragacanth, agar, gelatin, etc .; aluminum hydroxychloride, aluminum chloride, aluminum sulfate, salt Antiperspirants such as basic aluminum bromide, aluminum phenolsulfonic acid, basic aluminum iodide; 3,4,4-trichlorocarbanilide (TCC), benzalkonium chloride, benzethonium chloride, alkyltrimethylammonium chloride, resorcin, phenol , Fungicides such as sorbic acid, salicylic acid, hexachlorophene; jascent, skatole, lemon oil, lavender oil, absolute, jasmine, vanillin, benzoin, benzyl acetate, menthol and other masking agents, other emulsion stabilizers, chelating agents, UV protection agent, pH adjuster, antiseptic agent, pigments, whitening agent, analgesic / anti-inflammatory agent, antipruritic agent, bactericidal disinfectant, astringent, emollient, hormone agent, etc .; water; surfactant; W / O or O / W type emulsifiers, fragrances and the like can be mentioned.

  In the following examples, the melting point is a value measured according to JIS K0064: 1992. For measurement of the pore surface area, a mercury porosimeter PORE SIZER 9320 manufactured by Shimadzu Corporation was used, and the total pore surface area was determined.

The color measurement of the pigment was performed by the following method.
<Pigment colorimetry>
0.02g of pigment and 10ml of ethanol as an effective component are mixed and dispersed, and filtered under reduced pressure with a 47mm mm PTFE membrane filter to spread the pigment uniformly on the filter paper (0.0012g / cm ² ) and dried thoroughly. Using the sample for evaluation, color measurement is performed by a color difference meter CR-200 (manufactured by Minolta Camera Co., Ltd.), and the saturation C is obtained.

Example 1
Polyolefin HW800P (Mitsui Chemicals, polyethylene, molecular weight 8000, melting point 127 ° C, crystallinity 84%) and HW1105A (Mitsui Chemicals, acid-modified polyethylene, molecular weight 1500, melting point 104 ° C, crystallinity) 60%), skin color toning pigments (red iron oxide (Bengara Cloisonne, manufactured by Morishita Bengala Co., Ltd.), yellow iron oxide (Yellow LLXLO, manufactured by Titanium Industry Co., Ltd.), black iron oxide (BL-100, Titanium Industry Co., Ltd.), titanium oxide (CR50, Ishihara Sangyo Co., Ltd.) mixed at a mass ratio of 6: 38: 3: 53 and crushed with a coffee mill, H = 6 .1YR, V = 6.9, C = 3.4), behenyl alcohol (Calcor 220-80, manufactured by Kao Corporation, melting point 70 ° C.) as a low molecular compound, HW800P: HW1105A: skin color toning pigment: Behenyl alcohol was mixed at a mass ratio of 17: 4: 9: 70 and mixed uniformly using a mortar and pestle heated to 180 ° C. Next, spray cooling is performed in a gas phase of 25 ° C. with a nitrogen flow of 180 ° C. with a two-fluid nozzle (glass sprayer M type, SANSYO) to produce composite particles having an average particle size of 12 μm, and then hot ethanol is used Then, it was washed by filtration and sufficiently dried to obtain porous pigment composite particles. The pore surface area of this particle was 57 m ² / g.

Example 2
In Example 1, HW400P (manufactured by Mitsui Chemicals, Inc., polyethylene, molecular weight 4000, melting point 126 ° C., crystallinity 85%) was used as the polyolefin, and the mass of HW400P: skin color toning pigment: behenyl alcohol = 41: 9: 50 Except for using the ratio, porous pigment composite particles were obtained by the same operation. The pore surface area of the particles was 45 m ² / g.

Example 3
In Example 2, pigment composited particles were obtained by the same operation except that no washing treatment with hot ethanol was performed. The pore surface area of this particle was 1 m ² / g or less.

Comparative Example 1
Porous composite particles were obtained in the same manner as in Example 1 except that the skin color toning pigment was not mixed and the mass ratio was HW800P: HW1105A: behenyl alcohol = 23: 7: 70. The pore surface area of this particle was 55 m ² / g.

Test example 1
The composite particles obtained in Examples 1 to 3 and Comparative Example 1 were evaluated by artificial leather application by the following method. The results are shown in Table 1.

<Evaluation method by applying artificial leather>
Apply synthetic particles evenly using a cosmetic puff on artificial leather (foamed polyurethane, manufactured by Okamoto Shinwa Co., Ltd.) and on this artificial leather with model sebum (squalene) thinly applied in advance using a cotton swab. Then, adhesion and color were evaluated according to the following criteria by one expert panelist.

・ Adhesion ◎: Very good adhesion ○: Good adhesion △: Slightly poor adhesion ×: Poor adhesion ・ Color ◎: Bright skin color ○: Dark skin color △: Bright white ×: Dull white

Formulation Example 1
Using the composite particles obtained in Examples 1 to 3 and Comparative Example 1, foundations having the compositions shown in Table 2 were produced. About the obtained foundation, the finish was evaluated by the following method. The results are shown in Table 2.

<Finish evaluation method>
The evaluation result of the blank composition was used as a reference, and the evaluation was performed by one professional panelist according to the following three-stage criteria.
◎: Obviously has an effect of making pores difficult to see ○: Somewhat has an effect of making pores difficult to see Δ: Less effective to make pores difficult to see ×: No effect to make pores difficult to see (equivalent to blank) )

Claims (7)

Pigment composite porous particles having a pore surface area of 10 to 300 m ² / g, comprising a colored pigment comprising at least one pigment and a thermoplastic resin comprising a polyolefin resin . 2. The pigment-combined porous particle according to claim 1, wherein the colored pigment has a chroma C of 1.0 or more in a Munsell color system which is a color display system. The pigment-combined porous particles according to claim 1 or 2, wherein the content of the colored pigment is 1 to 200 parts by mass with respect to 100 parts by mass of the thermoplastic resin. The pigment-combined porous particles according to any one of claims 1 to 3, wherein the colored pigment is an inorganic pigment. The pigment-combined porous particles according to any one of claims 1 to 4, wherein the average particle size is 0.1 to 100 µm. Thermoplastic resins comprising a polyolefin resin, a melting point lower than the softening temperature (or melting point) of the colored pigment and the resin possess a ratio of inorganic (I) and organic (O) [I / O] of 1.00 The following low-molecular compound having a molecular weight of 50 to 1000 is mixed at a temperature equal to or higher than the softening temperature (or melting point) of the resin, and then sprayed into a refrigerant to remove the low-molecular compound from the obtained particles. The manufacturing method of the pigment-complexed porous particle according to any one of claims 1 to 5, which is made porous . Cosmetics containing the pigment composite porous particles according to any one of claims 1 to 5 .