JP6829887B2 - Manufacturing method of solid powder cosmetics and solid powder cosmetics - Google Patents

Description

The present invention relates to a solid powder cosmetic and a method for producing a solid powder cosmetic.

For solid powder cosmetics, one of the filling methods for a cosmetic container saucer is wet filling, in which a cosmetic base is slurried with a solvent, the slurry is filled in the saucer, and then the solvent is removed to solidify. There is a molding process.

By adopting the wet filling / molding process, not only the conventional filling method such as filling from the opening of the saucer, but also the slurry is filled from the filling holes on the bottom or the side surface of the saucer and press-molded. The injection molding (BIM) method can be applied.
The BIM method is a step of filling a slurry using a pump from a filling hole at the bottom or a side surface of a gold plate whose opening is previously covered with an upper mold (mold), and is included in the slurry after filling the slurry. The process comprises a step of removing a part of the solvent by vacuum and a step of press-molding the filled slurry with the upper die.
By using the BIM method, a pattern can be applied to the surface of the solid powder cosmetic, and the solid powder cosmetic can be given an aesthetic appearance, so that it has been widely adopted in recent years.

Patent Documents 1 to 6 describe powder cosmetics produced by a wet molding method in which a slurry containing cosmetic powder is prepared and filled and molded in a container.
Among them, Patent Document 1 describes an eye shadow in which a cosmetic slurry containing 2.0% methylpolysiloxane 2.0% treated talc and the like is prepared, and pressure-filled and molded using a back injection machine.
Further, Patent Document 2 describes a powder foundation obtained by adding light liquid isoparaffin to a powder cosmetic containing silica, talc, mica, etc. having an oil absorbing capacity of a certain amount or more to prepare a slurry, and then filling and molding the powder. Has been done.

Japanese Unexamined Patent Publication No. 2011-74023 Japanese Unexamined Patent Publication No. 2011-105626 Japanese Unexamined Patent Publication No. 2012-193111 Japanese Unexamined Patent Publication No. 2014-65691 Japanese Unexamined Patent Publication No. 2014-101293 Japanese Unexamined Patent Publication No. 2015-86156

An object of the present invention is to provide a solid powder cosmetic and a method for producing a solid powder cosmetic.

The present invention is a solid powder cosmetic containing a powder phase containing colloidal silica and an oil phase, wherein the solid powder cosmetic contains 0.1 to 5% by mass of the colloidal silica. Provide cosmetics.

The present invention contains colloidal silica, and a solid powder cosmetic can be obtained by adopting a wet filling / molding process of the cosmetic.

The solid powder cosmetic of the present invention is a solid powder cosmetic containing a powder phase containing colloidal silica and an oil phase, and 0.1 to 5% by mass of the colloidal silica in the solid powder cosmetic. contains.

<Powder phase>
Commercially available colloidal silica can be used, and examples thereof include Cyricia 350 and Cylicia 740 (all manufactured by Fuji Silysia Chemical Ltd.).
Colloidal silica takes the form of a liquid in which silica particles are colloidally dispersed in water or a solvent, but is included in the powder phase in the present invention.

The content of colloidal silica is 0.1 to 5% by mass, more preferably 0.5 to 5% by mass, and even more preferably 1 to 5% by mass in the solid powder cosmetic of the present invention.

The powder phase containing colloidal silica preferably contains talc and / or mica, and more preferably contains talc and mica.
When the powder phase contains talc and / or mica, the total content of talc and / or mica is preferably 10 to 600 parts by mass with respect to 1 part by mass of the colloidal silica content, and 20 to 200 parts by mass. It is more preferably parts by mass, and even more preferably 20 to 80 parts by mass.

When talc and / or silica are included, the total content varies depending on the type of solid powder cosmetics. For example, when the solid powder cosmetics are dark-colored, the total content of talc and / or silica. The content is preferably 40 to 60 parts by mass with respect to 1 part by mass of the colloidal silica content, and when the solid powder cosmetic is a light-colored one, the total content of talc and / or mica is The content of colloidal silica is preferably 20 to 65 parts by mass with respect to 1 part by mass.

The dark color system or light color system in the solid powder cosmetics of the present invention is the brightness in the L ^* a ^* b ^* color system obtained by a spectrocolorimeter (Spectro Color Meter SE2000, manufactured by Nippon Denshoku). It is defined by the numerical range of (L value). The dark color in the present invention means a color having a lightness (L value) of 56 or less on the surface of the pressed product after drying, and the light color means a color having a lightness (L value) of more than 56.

When the powder phase contains talc and mica, the talc content / mica content (mass ratio) is preferably in the range of 1.2 to 15.

When talc and mica are included, the mass ratio differs depending on the type of solid powder cosmetics. For example, when the solid powder cosmetics are light-colored, the mass ratio is in the range of 5 to 12. When the solid powder cosmetic is a dark-colored one, the mass ratio is preferably in the range of 1.5 to 5.

As the powder phase, a known powder component can be used as another cosmetic component.
As powders, for example, kaolin, sericite, alumina, glass flakes, calcium carbonate, magnesium carbonate, boron nitride, silicic anhydride, barium sulfate, cosmetic tar pigments, organic pigments, β-carotene, calsamine, carmine, chlorophyll, red iron oxide. , Yellow iron oxide, black iron oxide, ultramarine, dark blue, various mica (natural and synthetic products), chromium oxide, carbon black, white pigments, pearl pigments and other pigments,
Inorganic powders such as aluminum powder, spherical nylon, spherical polystyrene, mica titanium, phlogopite iron, titanium dioxide, titanium oxide, iron oxide;
Examples thereof include organic powders such as nylon powder, polyethylene powder, polymethyl methacrylate, wool powder, cellulose powder, silk powder, silicone powder, polyurethane powder, and starch powder.

<Oil phase>
The oil phase is a known cosmetic component other than that contained in the powder phase, and examples thereof include the following.
For example, hydrocarbons, squalane, liquid paraffin, light liquid isoparaffin, petrolatum, solid paraffin, microcrystalline wax, selecin, alkyd, acrylic, sulfonamide resin, nitrocellulose;
Mineral oil, olive oil, almond oil, cacao butter, macadamia nut oil, avocado oil, hardened palm oil, sunflower oil, sunflower oil, evening primrose oil, synthetic triglyceride, wax, sunflower seed wax, honey wax, carnauba wax, candelilla wax, lanolin, acetate Lanorin, higher fatty acids, higher alcohols, synthetic esters, linear / cyclic silicone oil, dimethylpolysiloxane, glycerin monostearate, decamethylcyclopentanesiloxane, polyoxyethylene modified dimethylpolysiloxane, octamethylcyclotetrasiloxane, polyphenylmethyl Siloxane, diphenylsiloxyphenyl trimeticone, dimethicone (30CS), rosinpentaerythritot ester, neopentyl glycol diisooctanoate, glycerin triisooctanoate, isopropyl myristate, propylene glycol monolaurate, decaglyceryl diisostearate, tri (capricic acid / Capricic acid) Oils such as glyceryl;
Examples thereof include ethanol, isopropanol, polyhydric alcohol, water-soluble polymer, bentonite, polyoxyethylene sorbitan monostearate, sorbitan sesquiisostearate, sorbitan isostearate, ethyl acetate, butyl acetate, butanol and other non-aqueous solvents.

In the solid powder cosmetic of the present invention, the ratio of the powder phase and the oil phase to the total amount is preferably 70 to 85% by mass, more preferably 73 to 80% by mass, and the total amount of the oil phase is The remaining ratio is 100% by mass.

The solid powder cosmetic of the present invention may contain other known cosmetic ingredients.
For example, moisturizers such as glycerin, propylene glycol, sorbitol, polyethylene glycol, dipropylene glycol, 1,3-butylene glycol, diglycerin, mannitol, POE methylglycoside, biopolymers, sucrose;
Emollient components such as cetyl ethylcaproate, diisostearyl malate, dipentaerythrityl tripolyhydroxystearate;
Quince seed, pectin, cellulose derivative, xanthan gum, sodium alginate, soagina, carboxyvinyl polymer;
Octyldodecyl myristate, neopentyl glycol diisooctanoate, sorbitan monooleate, glycerin triisooctate, octylmethoxycinnamate, POE sorbitan monooleate, isosetyl, isostearic acid, stearic acid, isopropyl palmitate, acetyltributyl citrate, Trimethylpentanediyl dibenzoate, stearylconium bentonite;
Thickeners, preservatives, emulsifiers, stabilizers, plasticizers;
Anionic surfactants, cationic surfactants, nonionic surfactants, amphoteric surfactants, protein-based surfactants;
Medicinal ingredients, vitamin C dipalmitate, vitamins, tocopherols, amino acids, whitening agents, fungicides;
Acidity regulator, potassium hydroxide, sodium hydroxide, triethanolamine, magnesium stearate, zinc stearate, metal ion encapsulant, citric acid, sodium citrate, lactate, sodium lactate,
UV absorbers, antioxidants, fragrances, preservatives, chelating agents, antioxidants, dispersants, browning inhibitors, buffers, anti-precipitation ingredients, gelling agents, organically modified clay minerals, usability modifiers, etc. Can be mentioned.

The solid powder cosmetic of the present invention
First step of mixing a powder phase containing colloidal silica and an oil phase to obtain a mixture,
The second step of preparing a slurry by mixing 30 to 70 parts by mass of water with 100 parts by mass of the mixture.
It is obtained by a method for producing a solid powder cosmetic having a third step of filling a mold with the slurry and then drying it.

<First step>
In this step, a powder phase containing colloidal silica and an oil phase are mixed to obtain a mixture.

A powder phase is prepared by stirring and mixing colloidal silica and a powder component among known cosmetic components with a mixer or the like.

This step is performed by adding an oil phase composed of known cosmetic components (excluding the powder contained in the powder phase) to a mixer or the like containing the powder phase and stirring and mixing until uniform. A mixture of is obtained.

<Second step>
In this step, preferably 30 to 70 parts by mass of water as a dispersion medium is added to 100 parts by mass of the mixture obtained in the previous step and mixed to prepare a slurry.
As the mixture obtained in the previous step, it is preferable to use a mixture filtered with a 20-mesh filter cloth or the like.

Water is added to the mixture obtained in the previous step and mixed again with a mixer or the like to prepare a slurry. The water used is preferably purified water from the viewpoint of hygiene.
The amount of water added to prepare the slurry is preferably 30 to 70 parts by mass, more preferably 40 to 60 parts by mass with respect to 100 parts by mass of the mixture.

<Third step>
In this step, the slurry obtained in the previous step is filled in a molding die and then dried to obtain a solid powder cosmetic.

As the molding die for filling the slurry, a mold for a solid powder cosmetic usually used such as a mold or a resin dish is used.

In addition to the method of injecting the slurry through the opening of the mold, the method of filling the slurry is to cover the upper mold (mold) with the opening of the mold, and then to the bottom or side surface of the mold. A BIM method can be used in which the slurry is filled from the provided filling holes and the filled slurry is press-molded by an upper die.

The slurry filled in the molding mold is put into a dryer or the like together with the mold, and the solvent in water and cosmetic components is removed by heat drying. When the BIM method is used, the metal plate filled with the slurry and press-molded is placed in a dryer or the like.
The heating temperature is preferably 40 ° C. or higher, more preferably 50 ° C. or higher, and the slurry is dried by heating until it completely solidifies.
Since the water used for preparing the slurry in the previous step and the water contained in each cosmetic component such as colloidal silica are removed by heating and drying in this step, most of the solid powder cosmetics of the present invention are water. Does not include.

The slurry prepared by the method for producing a solid powder cosmetic of the present invention has high fluidity, and the filling method by the BIM method is suitable. Therefore, a solid powder cosmetic with a pattern can be obtained by using an upper mold engraved with a cosmetic surface pattern or an inverted three-dimensional shape as the upper mold that covers the opening of the gold plate, which is a mold. Can be done.

The cosmetic of the present invention can be the powder cosmetic, particularly eye shadow, foundation, cheek, powdered white powder and the like.

Ingredients used Silica 1: Colloidal silica, product name "Syricia 740", comparative ingredient manufactured by Fuji Silicia Co., Ltd. Silica 2: spherical silica obtained by wet precipitation method, product name "Sunsphere H51", manufactured by AGC SI Tech Co., Ltd. Silica 3: Fumed silica obtained by the dry method, product name "Aerosil 200", manufactured by Nippon Aerosil Co., Ltd.

<Manufacturing method of solid powder cosmetics>
(1) After mixing each component shown in the powder phase of Table 1 with a mixer, each component shown in the oil phase of Table 1 is added to the powder phase in the mixer, and the mixture is stirred and mixed to prepare the cosmetic component. A mixture was prepared.
(2) 100 g of the mixture in the previous step was passed through a 20-mesh filter cloth, 50 parts by mass of water was added, and the mixture was uniformly mixed with a mixer to prepare a slurry.
(3) The slurry was press-molded into a gold plate by the BIM method. Here, the BIM method refers to a method of press molding after filling the slurry from the filling holes on the bottom or side surface of the dish (molding mold) set in the press mold. Then, the whole gold plate was dried in a dryer at 50 ° C. for 20 hours to obtain the solid powder cosmetics shown in Table 1.
The following were evaluated using the obtained solid powder cosmetics.

Slurry stability The slurry immediately after preparation was visually observed and evaluated according to the following criteria.
◯: No separation was observed even when the mixture was allowed to stand at room temperature (20 to 25 ° C.) for 10 hours or more.
Δ: No separation was observed even when the mixture was allowed to stand within 30 minutes at room temperature (20 to 25 ° C.).
X: Immediately separated.

Press-moldability The appearance of the press-molded product (solid powder cosmetic) immediately after press-molding in a gold plate by the BIM method and after drying was visually observed and evaluated according to the following criteria.
◯: No cracks or cracks were found in the press-molded product.
Δ: No cracks or cracks were observed in the press-molded product, but the appearance (slurry flow unevenness trace, etc.) was inferior.
X: Cracks and cracks were confirmed in the press-molded product.

Drop strength of press-molded products (solid powder cosmetics) Each solid powder cosmetics shown in Table 1 in a gold plate are dropped from a height of 30 cm onto the floor (concrete floor) in a compact state. , Evaluated according to the following criteria.
◯: The surface of the press-molded product (solid powder cosmetic) was normal even after being dropped 5 times.
X: When dropped 1 to 4 times, cracks or cracks were observed on the surface of the press-molded product (solid powder cosmetic).
“-” Was not evaluated because the press moldability was inferior.

Colloidal silica is used for the solid powder cosmetics of Examples 1 to 5, which are excellent in slurry stability and press moldability, and the surface of the solid powder cosmetics even if dropped in a molding mold. No cracks or cracks were found.
Comparative Examples 4 and 5 using spherical silica and fumed silica were not suitable as solid powder cosmetics that can adopt the BIM method because of their low slurry stability and press moldability.
Further, Comparative Examples 1 to 3 in which silica is not used are also inferior in slurry stability and press moldability, and are not suitable as solid powder cosmetics that can adopt the BIM method.

According to the method for producing a solid powder cosmetic of the present invention, a stable solid powder cosmetic can be obtained regardless of the shade of color of the cosmetic.
Table 2 shows dark eyeshadow (Prescription Example 1) and light eyeshadow (Prescription Example 2).

The solid powder cosmetic of the present invention can be suitably used as eye shadow, foundation, cheek, powder white powder and the like.

Claims (7)

A solid powder cosmetic containing a powder phase containing colloidal silica and an oil phase, wherein the solid powder cosmetic contains 0.1 to 5% by mass of the colloidal silica .
A solid powder cosmetic in which the powder phase further contains talc and mica, and the total content of talc and mica is 20 to 80 parts by mass with respect to 1 part by mass of the content of colloidal silica . The solid powder cosmetic according to claim 1, wherein the ratio of the powder phase and the oil phase to the total amount is 70 to 85% by mass of the powder phase and the balance is the oil phase. When the solid powder cosmetic is a dark color type having the following lightness (L value) of 56 or less, the total content of talc and mica is 40 to 60 mass by mass with respect to 1 part by mass of the content of colloidal silica. It is a department
When the solid powder cosmetic has the following lightness (L value) of more than 56, the total content of talc and mica is 20 to 65 parts by mass with respect to 1 part by mass of colloidal silica. The solid powder cosmetic according to claim 1.
(Dark or light color in solid powder cosmetics)
It is defined by the numerical range of brightness (L value) in the L * a * b * color system obtained by a spectrocolor meter SE2000 (manufactured by Nippon Denshoku). A dark color means a color having a lightness (L value) of 56 or less on the surface of a pressed product after drying, and a light color means a color having a lightness (L value) of more than 56. The solid according to any one of claims 1 to 3, wherein the talc content to the mica content ratio (the talc content / the mica content ratio) is in the range of 1.2 to 15. Powder cosmetics. The method for producing a solid powder cosmetic according to any one of claims 1 to 4.
First step of mixing a powder phase containing colloidal silica and an oil phase to obtain a mixture,
The second step of preparing a slurry by mixing 30 to 70 parts by mass of water with 100 parts by mass of the mixture.
A method for producing a solid powder cosmetic having a third step of filling a mold with the slurry and then drying it. The method for producing a solid powder cosmetic according to claim 5, wherein the third step is a step of filling the slurry in a molding die, press molding and drying. The method for producing a solid powder cosmetic according to claim 5 or 6, wherein the back injection molding method is carried out in the third step.