JP2010037210A - Solid powder cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solid powder cosmetic excellent in make-up effect, usability, and dropping strength. <P>SOLUTION: Provided is the solid powder cosmetic having Olsen penetration hardness of 60 to 95 under a load of 2 pounds, characterized by containing plate-like powder in an amount of ≥60 mass%. The solid powder cosmetic preferably contains composite plate-like powder prepared by coating the surface of plate-like powder with titanium dioxide in a mass ratio of 1.0 to 2.5 to the plate-like powder. The solid powder cosmetic is preferably obtained by adding a volatile oil to a cosmetic base agent comprising an oil and a powder component to form slurry, charging the slurry in a container, and then removing the volatile oil. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

    The present invention relates to a solid powder cosmetic excellent in usability and covering power.

In recent years, solid powder cosmetics such as powder foundation have become the mainstay of powder cosmetics because of their excellent portability. The foundation is blended with titanium dioxide to raise the so-called "covering power" that hides skin spots and dullness. However, titanium dioxide has a strong cohesive strength, and in powder cosmetics produced by mixing oil and powder base, the dispersion of titanium dioxide is reduced due to the cohesive force. In some cases, the force does not increase efficiently, and there are problems such as a feeling of use due to the aggregate. In order to solve these problems, the dispersibility of the powder in the solid powder cosmetics is improved by a so-called wet molding method in which a volatile solvent is allowed to coexist when mixing the oil and the powder base and removed during molding. Attempts have been made to improve (see, for example, Patent Document 1 and Patent Document 2). However, in these techniques, due to the influence of the cohesive strength of titanium dioxide, depending on the powder composition of the solid powder cosmetic, there is a problem that the molded body may be cracked when the solvent is removed. There was a case. Moreover, the aggregation of titanium dioxide in powder cosmetics is reduced by blending a titanium coated plate powder coated with a sufficient amount of titanium dioxide on the surface of the plate powder (see, for example, Patent Document 3). Attempts have also been made to solve the above-mentioned problems, and it is surely excellent in the action of suppressing aggregation, but when used for a long time, even in these techniques, the effect of reducing the cohesive force of titanium dioxide is seen. In other words, so-called “tekari” is generated, which causes partial agglomeration on the surface, and there is a problem in usability that cosmetics cannot be removed with a puff. In order to solve this problem, if the filling pressure of the cosmetic container is lowered, there may be a new problem that the drop strength is significantly reduced. . On the other hand, it has been found that the inclusion of such a titanium dioxide-coated plate-like powder also has an advantage in terms of cosmetic effect that exhibits excellent covering power while reducing unnatural hiding power.
Therefore, there has been a demand for a solid powder cosmetic material that has sufficient covering power, has excellent usability, such as no occurrence of shine even in long-term use, and has excellent drop strength.

On the other hand, in a solid powder cosmetic containing 60% by mass or more of a plate-like powder with poor tightness at the time of molding, by adjusting the Olsen penetration hardness of the solid powder cosmetic by a wet molding method using a volatile solvent It has never been known that a large difference appears in the quality of the final molded product. In addition, it is a cosmetic that contains a composite plate-like powder in which a certain amount or more of titanium dioxide is coated on the surface of the plate-like powder and reduces the unnatural hiding power of the titanium dioxide itself, and is a so-called wet molding method. It has not been known that the solid powder cosmetic molded by the method has sufficient covering power, excellent usability, and excellent drop strength.

JP 2007-291074 A JP 2006-213651 A JP 2006-241012 A

The present invention has been made against the background of the above circumstances. It is a solid powder cosmetic containing 60% or more of a plate-like powder and focusing on the cosmetic effect. Another object of the present invention is to provide an excellent solid powder cosmetic.

  In view of this situation, the present inventors have a solid powder cosmetic containing 60% or more of a plate-like powder, focusing on the cosmetic effect, and having excellent usability and excellent drop strength. As a result of earnest research efforts to obtain cosmetics, solid powder cosmetics containing 60% by mass or more of plate-like powders are prepared by a so-called wet molding method using a volatile oil agent. The present inventors have found that a charge can be obtained and have completed the present invention. That is, the present invention is as follows.

(1) A solid powder cosmetic having an Olsen penetration hardness of 60 to 95 at a load of 2 pounds and containing 60% by mass or more of a plate-like powder.
(2) The plate-like powder includes a composite plate-like powder formed by coating the surface of the plate-like powder with titanium dioxide having a mass ratio of 1.0 to 2.5 with respect to the plate-like powder. (1) The solid powder cosmetic described in (1).
(3) A volatile oil agent is added to a cosmetic base composed of a powder component and an oil agent containing the plate-like powder to form a slurry, and after filling the slurry in a container, the volatile oil agent is removed. The solid powder cosmetic according to (1) or (2), characterized by being prepared.
(4) The solid powder cosmetic according to any one of (1) to (3), wherein the content of the composite plate-like powder is 20% by mass to 60% by mass of the entire cosmetic.
(5) A method for producing a solid powder cosmetic containing 60% by mass or more of a plate-like powder, which is volatilized in a cosmetic base comprising a powder component consisting of the plate-like powder and other powders and an oil agent. A method for producing a solid powder cosmetic comprising: adding a functional oil agent to form a slurry; filling the slurry into a container; and removing the volatile oil agent to produce the slurry.
(6) The method for producing a solid powder cosmetic according to (5), wherein the solid powder cosmetic has a penetration hardness of 60 to 95 with an Olsen hardness meter at a load of 2 pounds.

According to the present invention, a solid powder cosmetic containing 60% or more of a plate-like powder and focusing on the cosmetic effect is provided, which is excellent in usability and excellent in drop strength. I can.

(1) Composite plate-like powder which is an essential component of the solid powder cosmetic of the present invention The solid powder cosmetic of the present invention is a plate-like powder, specifically, sericite whose surface may be treated. , Mica, talc, kaolin, plate-like silica plate-like alumina, plate-like barium sulfate, plate-like boron nitride, borosilicate glass flakes and the like are 60% by mass or more, more preferably 70% by mass or more, and further preferably 75% by mass or more. Containing, as an essential component, contains a composite plate-like powder whose surface is coated with titanium dioxide. The plate-like powder here refers to those having an aspect ratio of 50 or more. The plate-like powder whose surface is coated with titanium dioxide is not particularly limited, but mica, sericite, kaolin, plate-like silica, plate-like alumina, plate-like barium sulfate, plate-like boron nitride, borosilicate glass flakes and the like are suitable. Is exemplified. As the particle size of these plate-like powders, the major axis is preferably 1 to 100 μm. If the particle size is too small, the effect of preventing the formation of aggregates (tekari) on the surface of the solid cosmetic may be reduced, which is not preferable. On the other hand, if it is too large, the bulk density of the solid cosmetic becomes too high, and pulling it may lower the drop strength, which is not preferable.

The coating material of dioxide covering the surface of the plate-like powder is not particularly limited as long as it is an amount that gives the covering power enough to conceal skin troubles to the skin when used, but is not particularly limited. The ratio of titanium dioxide to the plate-like powder is preferably 1.0 to 2.5. If the coating amount is too small, the usability is good and even if the drop strength is maintained, the covering force may not be sufficient, which is not preferable. On the other hand, when the coating amount is too large, even if the covering force is sufficient, the usability and the drop strength may be lowered, which is not preferable.

The composite plate-like powder as an essential component of the solid cosmetic of the present invention may be further surface-coated with silicic acid anhydride, iron oxide or the like, or hydrogen methylpolysiloxane baking treatment or silylation treatment. The surface treatment may be performed.
The composite plate-like powder as an essential component of the solid powder cosmetic of the present invention can be synthesized, for example, by the following method. That is, the aforementioned plate-like powder is dispersed in an aqueous solution of titanium salt, titanium dioxide is prepared from the titanium salt, and the produced titanium dioxide is deposited on the surface of the plate-like powder to obtain the intended composite plate-like powder.
There are also commercially available products that can be used. Examples of these commercially available products include “Titanium Mica SPM-70” (manufactured by Teika).

The content of the composite plate-like powder as an essential component of the solid powder cosmetic of the present invention is 20% by mass to 60% by mass, and 25% by mass to 55% by mass with respect to the entire solid powder cosmetic (the entire powder component). %, Preferably 30% by mass to 50% by mass. At this time, in order to leave the covering power of the cosmetics to the composite plate-like powder, the surface contains titanium dioxide, including titanium dioxide subjected to surface hydrophobization treatment such as hydrogen methylpolysiloxane baking treatment. The amount is preferably 35% by mass or less, more preferably 30% by mass or less.
If the content of the composite plate-like powder is too small, a sufficient covering force may not be obtained, which is not preferable. Moreover, when there is too much content, a usability and drop strength may fall, and it is unpreferable.

(2) Solid powder cosmetic of the present invention The solid powder cosmetic of the present invention satisfies the above conditions, and has a penetration hardness of 60 to 95, more preferably 70 to 85, as measured by an Olsen hardness meter. And In order to obtain a cosmetic having such a property, the powder component and the oil component are mixed and kneaded together with the volatile oil agent, and this is filled in an inner dish, and then the volatile oil agent as a kneading medium is added. It is manufactured by volatilization and molding. Here, the volatile oil that can be used in the present invention is any of light isoparaffin, dimethicone, and cyclomethicone, and preferably has a boiling point of 150 to 250 ° C. In the case of dimethicone, the viscosity is 1 mPas · s or less in terms of viscosity. Some of these volatile oils are already commercially available as cosmetic raw materials, and such cosmetic raw materials can be purchased and used. Among such commercially available products, preferable examples include “IP Solvent 1620MU” manufactured by Idemitsu Kosan Co., Ltd. and “Silicone KF96-1” manufactured by Shin-Etsu Silicone. As the volatile oil agent as the kneading medium, only one species can be used, or two or more species can be used in combination. The amount is preferably 0.25 to 1.00 times that of a cosmetic base composed of a powder component and an oil component in terms of weight. In the kneading, kneading so that secondary agglomeration of the powder can be crushed as much as possible is preferable. Specifically, it is preferable to mix and knead using an earth kneader, a double planetary mixer or the like. After kneading to create a slurry and filling this, the volatile oil agent is volatilized and molded, but the volatilization condition of the volatile oil agent is preferably exemplified by a blowing condition of 6 to 48 hours at 50 to 100 ° C. it can.

(3) Optional components contained in the solid powder cosmetic of the present invention The cosmetic of the present invention is a solid powder cosmetic, and includes base makeup materials such as powder foundation and pressed powder, points such as powder eye color and cheek color Although it can be applied to a make-up fee, it is preferably used as a base make-up fee with a large use area in order to highlight its usability. When applied to such various solid powder cosmetics, in the solid powder cosmetic of the present invention, suitable components are appropriately selected from the optional components normally used in cosmetics, and the solid powder cosmetics to be applied are selected. It can be processed into a preferable property.

Such optional ingredients include, for example, macadamia nut oil, avocado oil, corn oil, olive oil, rapeseed oil, sesame oil, castor oil, safflower oil, cottonseed oil, jojoba oil, coconut oil, palm oil, liquid lanolin, hardened coconut oil, hardened Oil, molasses, hydrogenated castor oil, beeswax, candelilla wax, carnauba wax, botarou, lanolin, reduced lanolin, hard lanolin, jojoba oil, waxes, liquid paraffin, squalane, pristane, ozokerite, paraffin, ceresin, petrolatum, micro Hydrocarbons such as crystallin wax, oleic acid, isostearic acid, lauric acid, myristic acid, palmitic acid, higher fatty acids such as stearic acid, behenic acid, undecylenic acid, cetyl alcohol, stearyl alcohol, isostearyl High alcohols such as alcohol, behenyl alcohol, octyldodecanol, myristyl alcohol, cetostearyl alcohol, cetyl isooctanoate, isopropyl myristate, hexyldecyl isostearate, diisopropyl adipate, di-2-ethylhexyl sebacate, cetyl lactate, malic acid Diisostearyl, di-2-ethylhexanoic acid ethylene glycol, dicaprate neopentyl glycol, di-2-heptylundecanoic acid glycerin, tri-2-ethylhexanoic acid glycerin, tri-2-ethylhexanoic acid trimethylolpropane, tri Synthetic ester oils such as trimethylolpropane isostearate and pentane erythritol tetra-2-ethylhexanoate, dimethylpolysiloxane, methylphenylpolysiloxane Chain polysiloxanes such as xane and diphenylpolysiloxane, cyclic polysiloxanes such as octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane, dodecamethylcyclohexanesiloxane, amino-modified polysiloxane, polyether-modified polysiloxane, alkyl-modified polysiloxane, Oil agents such as silicone oil such as modified polysiloxane such as fluorine-modified polysiloxane, anionic surfactants such as fatty acid soap (sodium laurate, sodium palmitate, etc.), potassium lauryl sulfate, triethanolamine ether of alkyl sulfate, chloride Cationic surfactants such as stearyltrimethylammonium, benzalkonium chloride, laurylamine oxide, imidazoline-based amphoteric surfactants (2-cocoyl-2-imidazo Linium hydroxide-1-carboxyethyloxy disodium salt, etc.), betaine surfactants (alkyl betaine, amide betaine, sulfobetaine, etc.), amphoteric surfactants such as acylmethyltaurine, sorbitan fatty acid esters (sorbitan) Monostearate, sorbitan sesquioleate, etc.), glycerin fatty acids (eg, glyceryl monostearate), propylene glycol fatty acid esters (eg, propylene glycol monostearate), hardened castor oil derivatives, glycerin alkyl ethers, POE sorbitan fatty acid esters (POE sorbitan monooleate, polyoxyethylene sorbitan monostearate, etc.), POE sorbite fatty acid esters (POE-sorbitol monolaurate, etc.), POE glycerin fatty acid ester (POE-glycerin monoisostearate, etc.), POE fatty acid esters (polyethylene glycol monooleate, POE distearate, etc.), POE alkyl ethers (POE2-octyldodecyl ether, etc.), POE alkyl phenyl ethers (POE nonylphenyl) Ethers, etc.), Pluronic types, POE / POP alkyl ethers (POE / POP2-decyltetradecyl ether, etc.), Tetronics, POE castor oil / hardened castor oil derivatives (POE castor oil, POE hardened castor oil, etc.), Nonionic surfactants such as sucrose fatty acid ester and alkyl glucoside, polyethylene glycol, glycerin, 1,3-butylene glycol, erythritol, sorbitol, xylitol, maltitol, propylene group Polyhydric alcohols such as coal, dipropylene glycol, diglycerin, isoprene glycol, 1,2-pentanediol, 2,4-hexylene glycol, 1,2-hexanediol, 1,2-octanediol, pyrrolidone carvone Moisturizing ingredients such as sodium acid, lactic acid, sodium lactate, guar gum, quince seed, carrageenan, galactan, gum arabic, pectin, mannan, starch, xanthan gum, curdlan, methylcellulose, hydroxyethylcellulose, carboxymethylcellulose, methylhydroxypropylcellulose, chondroitin Sulfuric acid, dermatan sulfate, glycogen, heparan sulfate, hyaluronic acid, sodium hyaluronate, tragacanth gum, keratan sulfate, chondroitin, mucoitin sulfate, hygiene Droxyethyl guar gum, carboxymethyl guar gum, dextran, keratosulfuric acid, locust bean gum, succinoglucan, caronic acid, chitin, chitosan, carboxymethylchitin, agar, polyvinyl alcohol, polyvinylpyrrolidone, carboxyvinyl polymer, sodium polyacrylate, Thickeners such as polyethylene glycol and bentonite, surface may be treated, powder such as mica, talc, kaolin, synthetic mica, calcium carbonate, magnesium carbonate, silicic anhydride (silica), aluminum oxide, barium sulfate The surface may be treated, bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide, zinc oxide inorganic pigments, surface may be treated, normal mica Titanium, fish phosphorus foil, oxychloride Pearls such as trout, red 202, red 228, red 226, yellow 4, blue 404, yellow 5, red 505, red 230, red 223, which may be raked, Organic dyes such as orange 201, red 213, yellow 204, yellow 203, blue 1, green 201, purple 201, red 204, polyethylene powder, polymethyl methacrylate, nylon powder, organopoly Organic powders such as siloxane elastomers, paraaminobenzoic acid UV absorbers, anthranilic acid UV absorbers, salicylic acid UV absorbers, cinnamic acid UV absorbers, benzophenone UV absorbers, sugar UV absorbers, 2 -(2'-hydroxy-5'-t-octylphenyl) benzotriazole, 4-methoxy-4'-t-butyldibenzoylmethane, etc. UV absorbers, lower alcohols such as ethanol and isopropanol, vitamin A or derivatives thereof, vitamin B6 hydrochloride, vitamin B6 tripalmitate, vitamin B6 dioctanoate, vitamin B2 or derivatives thereof, vitamin B12, vitamin B15 or derivatives thereof, etc. Vitamin E such as vitamin B, α-tocopherol, β-tocopherol, γ-tocopherol, vitamin E acetate, vitamin D, vitamin D, vitamin H, pantothenic acid, panthetin, pyrroloquinoline quinone, etc. . Among these, dimethicone that is not classified as a volatile oil as an oil, generally, when using a viscosity of 10 mPas · s or more, a liquid fatty acid under the conditions of 1 atm and 25 ° C. in order to prevent dissolution of the volatile oil. It is preferable to contain 0.1-1 mass part of triglycerides with respect to the said dimethicone. A preferred example of the fatty acid triglyceride is 2-ethylhexanoic acid triglyceride.

EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, it cannot be overemphasized that this invention is not limited only to an Example.

<Production Example 1> 500 ml of water was placed in a titanium dioxide-coated sericite 1 L beaker, and 50 g of sericite was dispersed using a disper. Under stirring conditions, a solution prepared by dissolving 100.1 g of titanyl sulfate in 100 ml of water and a solution prepared by dissolving 50.1 g of sodium hydroxide were added dropwise to this dispersion while maintaining the pH of the dispersion at 5-8. After completion of the dropwise addition, the pH was adjusted to 8 and stirring was continued for 2 hours while maintaining the system at 80 ° C. to obtain a composite plate-like powder 1 in which titanium dioxide was coated on the sericite surface.

<Examples 1-4><Comparative Examples 1-3>
A powder foundation, which is a solid cosmetic, was prepared according to the following process. That is, in Examples 1 to 4 and Comparative Example 1, the components in Table 1 (A) were mixed with a Henschel mixer and then pulverized with a pulverizer. Then, (b) component was added, stirring this mixture with a Henschel mixer again, mixing was continued, and the cosmetic base was obtained. The obtained cosmetic base was taken out from the Henschel mixer, then pulverized again with a pulverizer, and kneaded in a double planet mixer (DPM) at a ratio of 0.5 isoparaffin to the cosmetic base 1 in terms of mass. A slurry was created. This slurry was filled in an aluminum pan, and isoparaffin was removed under vacuum conditions to obtain a powder foundation. For Comparative Examples 2 and 3, (a) component and (b) component were mixed and pulverized with a Henschel mixer, and then a comparative example 2 was pressed with a semi-automatic press using a die. For Example 3, the aluminum pan was filled with a pressing pressure of 40 kg / cm @ 2. The numbers in Table 1 represent mass%.
Table 1 also shows the Olsen hardness at a load of 2 pounds.

１）被覆二酸化チタンのマイカに対する比が１．０以下の本発明に含まれないチタン被覆マイカ
＊ ２）被覆二酸化チタンのマイカに対する比が２．３である本発明のチタン被覆マイカ
＊ 比較例１においてはイソパラフィン除去後、パウダーファンデーション表面にヒビが入り、使用不能となった。

1) Titanium-coated mica not included in the present invention in which the ratio of coated titanium dioxide to mica is 1.0 or less * 2) Titanium-coated mica of the present invention in which the ratio of coated titanium dioxide to mica is 2.3 * Comparative Example 1 After removing the isoparaffin, the surface of the powder foundation cracked and became unusable.

<Test Example 1> Continuous use test of powder foundation.
The surfaces of the powder foundations of Examples 1 to 4, Comparative Example 2 and Comparative Example 3 were continuously rubbed with a puff many times, and the removal of the foundation into the puff during continuous use was evaluated. In Examples 1 to 4 and Comparative Example 2, it could be used without any problem until the bottom of the aluminum pan was seen, but in Comparative Example 3, aggregates (so-called “scales”) were formed on the surface, and the amount taken into the puff during use Became extremely low and became unusable.

<Test Example 2> Sensory evaluation of powder foundation The usability when the powder foundations of Examples 1 to 4 and Comparative Examples 2 to 3 were applied to the skin was evaluated. That is, the feel and function when the powder foundations of Examples 1 to 4 and Comparative Examples 1 and 2 were used by 5 skilled evaluators were evaluated from the following viewpoints, and the average score of 5 persons was scored. The results are shown in Table 2.
(1) How to remove a puff Good; 5 Good; 4 Normal; 3 Somewhat bad; 2 Bad; 1
(2) Adhesion to the skin (determined by the degree of powder floating) Good; 5 Good; 4 Normal; 3 Somewhat bad; 2 Bad 1
(3) Covering power for skin troubles such as spots; 5 Feel slightly; 4 Feel; 3 Feel quite; 2 Feel clearly; 1

<Test Example 3> Drop strength test of powder foundation After the foundations of Examples 1 to 4 and Comparative Examples 2 to 3 filled in an aluminum pan were packaged with a styrenic buffer material and placed in a single box, the height was 25 cm. Then it fell. For each sample, this test was performed at n = 5, and the number of foundations cracked or applied was defined as the drop strength. The results are also shown in Table 2. The smaller the number, the higher the drop strength.

  From Test Examples 1 to 3, the solid cosmetic of the present invention is excellent in covering power for skin troubles such as spots, and has problems such as agglomerates derived from poor dispersibility of titanium dioxide and the like, resulting in reduced usability. It was proved that the usability of maintaining the drop strength was excellent.

Cosmetics It can be effectively used especially for makeup cosmetics.

Claims (6)

A solid powder cosmetic having an Olsen penetration hardness of 60 to 95 at a load of 2 pounds, and containing 60% by mass or more of a plate-like powder. The plate-like powder contains a composite plate-like powder obtained by coating the surface of the plate-like powder with titanium dioxide having a mass ratio of 1.0 to 2.5 with respect to the plate-like powder. The solid powder cosmetic according to claim 1. A volatile oil is added to a cosmetic base comprising a powder component and an oil containing the plate-like powder to form a slurry, and after the slurry is filled in a container, the volatile oil is removed and prepared. The solid powder cosmetic according to claim 1 or 2, wherein The solid powder cosmetic according to any one of claims 1 to 3, wherein the content of the composite plate-like powder is 20% by mass to 60% by mass of the total cosmetic. A method for producing a solid powder cosmetic comprising 60% by mass or more of a plate-like powder, wherein a volatile oil agent is added to a cosmetic base comprising a powder component and an oil agent comprising the plate-like powder and other powders. In addition, a method for producing a solid powder cosmetic is characterized in that a slurry is formed, and the slurry is filled in a container and then the volatile oil agent is removed to produce the solid powder cosmetic. The method for producing a solid powder cosmetic according to claim 5, wherein the solid powder cosmetic has a penetration hardness of 60 to 95 with an Olsen hardness meter at a load of 2 pounds.