JP7503300B2 - Powdered lip overcoat cosmetic - Google Patents

Description

The present invention relates to a powdered lip overcoat cosmetic.

Conventionally, a method of applying a thin layer of powder cosmetic on top of lipstick has been known as a method for preventing lipstick from transferring to other items. However, this method has problems such as the powder not blending well with the lipstick and making it difficult to apply evenly, or the lipstick color turning whitish, reducing the cosmetic effect. In response to these problems, lipstick overcoats have been proposed that aim not only to prevent color transfer but also to achieve cosmetic effects. For example, a paste-like lipstick overcoat that combines a perfluoroalkyl group-containing fluorine-modified silicone with a powder component has been reported (Patent Document 1). However, although this lipstick overcoat can sufficiently prevent color transfer to smooth surfaces such as tableware, it is not sufficiently effective against color transfer to masks made of uneven fabrics such as cloth and urethane.

Due to the COVID-19 pandemic, wearing masks has become a part of everyday life, and lipstick stains can easily transfer onto the mask, creating a problem.

Japanese Patent Application Laid-Open No. 8-295614

The present invention has been made to solve the problems of the conventional technology described above, and aims to provide a lipstick overcoat cosmetic that is less likely to impair the cosmetic effect by suppressing color transfer to masks made of cloth, urethane, etc., and by suppressing changes in lipstick color and loss of luster.

As a result of intensive research, the inventors have discovered that a powdered lipstick overcoat cosmetic that combines spherical powder and plate-like powder with specific shapes and particle sizes in a fixed ratio can suppress lipstick color transfer and is less likely to impair the cosmetic effect.

That is, the present invention provides a powdered lip overcoat cosmetic composition comprising the following components: (a) spherical powder having an average particle size of 3 to 50 μm, and (b) plate-like powder having an average particle size of 10 to 60 μm, in which the mass ratio of component (b) to the total content of components (a) and (b) ((b)/((a)+(b))) is 0.1 to 0.9.

In the cosmetic preparation, it is preferable that the content of component (a) is 10 to 99% by mass and the content of component (b) is 1 to 90% by mass, and it is more preferable that the content of component (a) is 30 to 90% by mass and the content of component (b) is 10 to 70% by mass.

In the cosmetic composition, it is preferable that the total content of the components (a) and (b) is 80% by mass or more.

It is preferable that the average particle size of the component (a) is 5 to 40 μm, and the average particle size of the component (b) is 20 to 50 μm.

It is preferable that (b)/((a)+(b)) is 0.1 to 0.7.

The powdered lip overcoat cosmetic of the present invention can prevent color transfer to masks and other items, and does not impair the cosmetic effect.

The present invention is described in detail below, but is not limited to the embodiments described in this specification.

The present invention is a powdered lip overcoat cosmetic that comprises the following components: (a) spherical powder having an average particle size of 3 to 50 μm, and (b) plate-like powder having an average particle size of 10 to 60 μm, and the mass ratio of component (b) to the total content of components (a) and (b) ((b)/((a)+(b))) is 0.1 to 0.9.

Component (a) is a spherical powder. Here, "spherical" may include not only a perfect sphere, but also shapes such as approximately spherical shapes such as confetti-like. Furthermore, the "average particle size" is a value determined, for example, by measurement using a particle size distribution measuring device based on the laser diffraction/scattering method, or by observation using an ultra-high voltage transmission electron microscope (TEM) or scanning electron microscope (SEM), and when using a commercially available product, the average particle size indicated on the product may be used.

The spherical powder (a) in the present invention has an average particle size of 3 to 50 μm. If the average particle size of the spherical powder is less than 3 μm, it will not spread well, and if it exceeds 50 μm, it will feel rough when applied to the lips, and the feeling of use will be reduced. In order to more reliably prevent a decrease in the feeling of use, it is preferable to make it 5 to 40 μm.

The spherical powder (a) is not particularly limited in terms of its material, so long as it is spherical and has the above average particle size, and spherical powders used in ordinary cosmetics can be used. Specific examples include, but are not limited to, spherical silicic anhydride, spherical cellulose powder, spherical poly(alkyl meth)acrylate, spherical nylon powder, spherical polyethylene powder, spherical polystyrene powder, spherical silicone powder, and spherical methylsiloxane network polymer. The structure of the spherical powder (a) is also not particularly limited, and may be, for example, solid or hollow, or may be porous. Furthermore, the spherical powder (a) may be one that has been hydrophilized or hydrophobized on part or all of its surface. Methods for hydrophilization or hydrophobization have already been fully established, and can be performed by conventionally known methods. The spherical powder (a) can be used alone or in combination of two or more types that differ in particle size, material, structure, or surface treatment.

Spherical powders that can be used in the present invention are commercially available, and commercially available products can also be used. Examples include, but are not limited to, SILICA MICRO BEAD P-1500 (average particle size 5.7 μm) (Nikki Catalysts), Godball E-90C (average particle size 20 to 40 μm) (Suzuki Oil Industries), TOSPEARL 150KA (average particle size 5 μm) (Momentive Performance Materials), Ganzpearl GMP-0800 (average particle size 8 μm) (Aica Industries), SA-SB-300 (average particle size 5 μm) (Miyoshi Chemicals), CELLULOBEADS D-5 (average particle size 5 μm) (Daito Chemicals), KSP-102 (average particle size 30 μm) (Shin-Etsu Chemical), and Karumaru SCS-M5 (average particle size 5 μm) (Sakai Chemicals).

Component (b) is a plate-like powder. Here, "plate-like" may include not only plate-like in the narrow sense, but also flake-like or scaly shapes. The "average particle size" is the same as defined above.

The plate-like powder (b) in the present invention has an average particle size of 10 to 60 μm. If the average particle size of the plate-like powder is less than 10 μm, the lipstick will become whitish, reducing the cosmetic effect, while if it exceeds 50 μm, it will feel rough when applied to the lips, reducing the feel when used. In order to further improve the effect of preventing the lipstick from becoming white and the cosmetic effect, and to more reliably prevent a decrease in the feel when used, it is preferable to set the average particle size to 20 to 50 μm.

The plate-like powder (b) is not particularly limited in terms of its material, so long as it has the above-mentioned average particle diameter, and any plate-like powder used in ordinary cosmetics can be used. Specific examples include, but are not limited to, plate-like zinc oxide, plate-like titanium oxide, plate-like cerium oxide, plate-like barium sulfate, talc, mica, plate-like kaolin, sericite, muscovite, plate-like synthetic mica, phlogopite, synthetic phlogopite, lepidolite, biotite, lithia mica, plate-like anhydrous silicic acid, plate-like hydroxyapatite, bentonite, montmorillonite, hectorite, plate-like ceramic powder, plate-like alumina, plate-like boron nitride, plate-like polymethyl methacrylate powder, lauroyl lysine, plate-like iron oxide, titanium oxide-coated mica, titanium oxide-treated mica, bismuth oxychloride, titanium oxide-coated bismuth oxychloride, titanium oxide-coated talc, fish scale foil, titanium oxide-coated colored mica, aluminum, and plate-like glass powder. In addition, the plate-like powder (b) may have a hydrophilic or hydrophobic treatment applied to a part or all of its surface. The spherical powder (b) may be used alone or in combination of two or more types having different particle sizes, materials, or surface treatments.

The plate-like powders that can be used in the present invention are commercially available, and commercially available products can also be used. Examples include, but are not limited to, PDM-40L (average particle size 40 μm), PDM-20L(S) (average particle size 20 μm) (Topy Industries), Silky Flake FTD025FY-F02 (average particle size 25 μm), Silky Flake FTD025FY-F12 (average particle size 25 μm) (Nippon Sheet Glass), SA-350 (average particle size 42 μm) (Yamaguchi Mica), and PAOG-R (average particle size 33 μm) (Nippon Talc).

In the powdered lip overcoat cosmetic of the present invention, it is necessary to contain the components (a) and (b) having the above-mentioned predetermined average particle size in a predetermined mass ratio. In the powdered lip overcoat cosmetic of the present invention, the mass ratio of component (b) to the total content of components (a) and (b) ((b)/((a)+(b))) is 0.1 to 0.9. Within this mass ratio range, a powdered lip overcoat cosmetic can be obtained that satisfies all of the following requirements: ease of application on lipstick, suppression of color transfer, and cosmetic effect. On the other hand, if the mass ratio is less than 0.1, the cosmetic will be essentially composed of component (a), and if it exceeds 0.9, the cosmetic will be essentially composed of component (b), which will result in poor spreadability, difficulty in application on lipstick, and reduced cosmetic effect, such as the lipstick turning whitish. The above mass ratio range is preferably 0.1 to 0.7 in order to more reliably obtain a cosmetic that is good in all aspects.

The powdered lip overcoat cosmetic of the present invention may be appropriately blended with powder components other than the above components (a) and (b) as long as the effects of the present invention are not impaired. Examples of such powders include inorganic powders such as talc, kaolin, mica, zeolite, etc.; inorganic white pigments such as titanium dioxide and zinc oxide; inorganic red pigments such as iron oxide (red iron oxide); inorganic yellow pigments such as yellow iron oxide and yellow ochre; black pigments such as black iron oxide and carbon black; inorganic green pigments such as chromium oxide, chromium hydroxide, and cobalt titanate; inorganic blue pigments such as ultramarine and Prussian blue; pearl pigments such as titanium oxide coated mica, colored titanium oxide coated mica, bismuth oxychloride, and fish scale foil; metal powder pigments such as aluminum powder and copper powder; Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 206, Red No. 207, Red No. 208, Red No. 209, Red No. 210, Red No. 211, Red No. 212, Red No. 213, Red No. 214, Red No. 215, Red No. 216, Red No. 217, Red No. 218, Red No. 219, Red No. 220, Red No. 221, Red No. 222, Red No. 223, Red No. 224, Red No. 225, Red No. 226, Red No. 227, Red No. 228, Red No. 229, Red No. 230, Red No. 231, Red No. 232, Red No. 233, Red No. 234, Red No. 235, Red No. 236, Red No. 237, Red No. 238, Red No Organic pigments such as Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Blue No. 404; organic pigments such as zirconium, barium, or aluminum lakes, such as Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3, and Blue No. 1; cut pieces of resin films such as polyethylene terephthalate-aluminum-epoxy laminate powder, and pearls and glitter made from composite powders of these.

In addition to the above-mentioned components, the powdered lip overcoat cosmetic of the present invention can contain appropriate ingredients used in ordinary cosmetics, such as oil-based ingredients, surfactants, water-soluble polymers, oil-soluble polymers, ethanol, polyhydric alcohols, preservatives, antioxidants, pigments, thickeners, pH adjusters, fragrances, UV absorbers, moisturizers, blood circulation promoters, cooling agents, antiperspirants, disinfectants, skin activators, etc., within the range that does not impair the effects of the present invention.

In order to ensure that the powdered lip overcoat cosmetic of the present invention does not lose its effect, it is preferable that the content of component (a) is 10 to 99% by mass and the content of component (b) is 1 to 90% by mass relative to the total mass of the cosmetic. If the content of component (a) is less than 10% by mass and the content of component (b) is more than 90% by mass, the effect of component (a) is not sufficiently obtained, and if the content of component (a) is more than 99% by mass and the content of component (b) is less than 1% by mass, the effect of component (b) is not sufficiently obtained, and as a result, the color of the lipstick may become whitish, and the cosmetic effect may be reduced. In order to more reliably obtain a cosmetic that is good in all aspects, it is more preferable that the content of component (a) is 30 to 90% by mass and the content of component (b) is 10 to 70% by mass relative to the total mass of the cosmetic.

In addition, when the powdered lip overcoat cosmetic of the present invention contains components other than components (a) and (b), the total content of components (a) and (b) in the cosmetic is preferably 80% by mass or more. If the content of components other than components (a) and (b) exceeds 20% by mass, the effects of components (a) and (b) may not be sufficiently obtained.

The method for producing the powdered lip overcoat cosmetic of the present invention is not particularly limited, and it can be produced using a mixer or grinder that is typically used for mixing, dispersing, and grinding powder cosmetics. Examples of mixers include container rotary mixers, high-speed fluid mixers, and vibration mixers. Examples of grinders include compression grinders, shear grinders, impact grinders, ball media grinders, and airflow grinders.

The powdered lip overcoat cosmetic of the present invention spreads without breaking down the cosmetic film, and after application, its affinity with the lipstick cosmetic film gradually improves, sufficiently preventing color transfer to masks and other items made of textured fabrics such as cloth or urethane. In addition, the color of the lipstick is less likely to change and loss of gloss is also suppressed, making it useful for improving the cosmetic effect and its durability.

The present invention will be further explained with reference to the following examples. Note that the present invention is not limited to these examples.

<Examples 1 to 36 and Comparative Examples 1 to 15>
Powdered lip overcoat samples were prepared according to the compositions and manufacturing methods shown in Tables 1 to 16 below, and applied on top of evaluation lipsticks prepared according to the manufacturing methods shown below, and evaluated in terms of "effect of preventing color transfer,""effect of preventing color bleeding,""effect of preventing lipstick from becoming white,""effect of preventing lipstick from losing its luster," and "ease of spreading on top of lipstick" according to the evaluation methods and judgment criteria shown below, and the results are also shown in Tables 1 to 16. In the tables, the numerical values for each component are in mass %.

*1: SILICA MICRO BEAD P-1500 (Nikki Catalyst Industry)
*2: God Ball E-90C (Suzuki Oil Industries)
*3: TOSPEARL 150KA (Momentive Performance Materials)
*4: Ganz Pearl GMP-0800 (Aica Corporation)
*5: SA-SB-300 (Miyoshi Chemicals)
*6: CELLULOBEADS D-5 (Daito Kasei Kogyo)
*7: KSP-102 (Shin-Etsu Chemical Co., Ltd.)
*8: Karumaru SCS-M5 (Sakai Chemical Industry)
*9: SB-700/HA(N) (Miyoshi Chemicals)
*10: COSMO55 (Nikki Catalyst Industry)
*11: God Ball E-2C (Suzuki Oil Industries)
*12: God Ball B-6C (Suzuki Oil Industries)
*13: PDM-40L (Topy Industries)
*14: Silky Flake FTD025FY-F02 (Nippon Sheet Glass)
*15: SA-350 (Yamaguchi Mica)
*16: PDM-20L(S) (Topy Industries)
*17: Silky Flake FTD025FY-F12 (Nippon Sheet Glass)
*18: PAOG-R (Nippon Talc)
*19: SG-95 (Nippon Talc)
*20: Synthetic mica NK-8G (Nihon Koken Kogyo)
*21: Talc JA-13R (Asada Flour Milling)

[Production method]
The powder raw materials were uniformly mixed and dispersed in a mixer, and then filled into a transparent bottle to obtain a powdered lip overcoat cosmetic.

[Lipstick for evaluation]
The following components 1 to 5 were heated and dissolved, and then components 6 to 9 were added and mixed uniformly and dissolved at 90° C. The mixture was poured into a container and cooled to obtain a stick-shaped lipstick for evaluation.

[Evaluation method and criteria]
a. Color transfer prevention effect (evaluation method)
The lipstick for evaluation was applied twice to a length of 3 cm on a human upper arm, and each sample was applied on top of it, after which a nonwoven mask was pressed against it to check for color transfer.
(Evaluation criteria)
Very good: ◎
Excellent: ○
Not enough: △
No effect: ×

b. Effect of preventing color bleeding (evaluation method)
A practical usability test was conducted by a panel of five people. The evaluation was carried out by applying the lipstick for evaluation to the lips, and then applying each sample on top of the lipstick. After 4 hours, the panel members scored the presence or absence of the effect of preventing color bleeding based on the following score, and the average score was used as the evaluation value and evaluated according to the following evaluation criteria.
(Score)
0 points: no effect 1 point: insufficient 2 points: excellent 3 points: very excellent (Evaluation criteria)
◎: 2.5 points or more ○: 1.5 points or more but less than 2.5 points △: 0.5 points or more but less than 1.5 points ×: Less than 0.5 points

c. Effect of preventing lipstick from turning white (Evaluation method)
A practical usability test was conducted by a panel of five people. The evaluation was carried out by applying the lipstick for evaluation to the lips, and then applying each sample on top of the lipstick. Immediately after applying the lipstick, the panel members scored whether the applied film turned whitish based on the following criteria, and the average score was used as the evaluation value and the evaluation was carried out according to the following criteria.
(Score)
0 points: no effect 1 point: insufficient 2 points: excellent 3 points: very excellent (Evaluation criteria)
◎: 2.5 points or more ○: 1.5 points or more but less than 2.5 points △: 0.5 points or more but less than 1.5 points ×: Less than 0.5 points

d. Effect of preventing loss of gloss of lipstick (Evaluation method)
A practical usability test was conducted by a panel of five people. The evaluation was carried out by applying the lipstick for evaluation to the lips, followed by applying each sample on top of the lipstick. After 4 hours, the state of gloss was scored according to the following score system, and the average score was used as the evaluation value and evaluated according to the following evaluation criteria.
(Score)
0 points: No shine 1 point: Not enough 2 points: Good 3 points: Very good (Evaluation criteria)
◎: 2.5 points or more ○: 1.5 points or more but less than 2.5 points △: 0.5 points or more but less than 1.5 points ×: Less than 0.5 points

e. Ease of spreading over lipstick (Evaluation method)
A practical usability test was conducted by a panel of five people. The evaluation was carried out by applying the lipstick for evaluation to the lips, and then applying each sample on top of the lipstick. The ease of spreading was scored based on the following scores, and the average score was used as the evaluation value and evaluated according to the following evaluation criteria.
(Score)
0 points: poor 1 point: slightly poor 2 points: excellent 3 points: very good (Evaluation criteria)
◎: 2.5 points or more ○: 1.5 points or more but less than 2.5 points △: 0.5 points or more but less than 1.5 points ×: Less than 0.5 points

[result]
As is clear from the results in Tables 1 to 11, Examples 1 to 36, which are the products of the present invention, were powder cosmetics excellent in all of the following categories: "effect of preventing color transfer,""effect of preventing color bleeding,""effect of preventing lipstick from becoming white,""effect of preventing lipstick from losing shine," and "ease of spreading on lipstick." On the other hand, in Comparative Examples 1 to 12, which used spherical powder having an average particle size outside the range of the average particle size of component (a) and/or plate-like powder having an average particle size outside the range of the average particle size of component (b), the effect of preventing color transfer was good, but the evaluations of the effect of preventing lipstick from becoming white, the effect of preventing shine loss, and the ease of spreading were all low. The same was true for Comparative Examples 13 to 15, which had low contents of components (a) and (b), and although the effect of preventing color transfer was excellent, the evaluations of the effect of preventing lipstick from becoming white, the effect of preventing shine loss, and the ease of spreading were low. The same was true when each of components 1 to 9 (corresponding to component (a)) or components 13 to 18 (corresponding to component (b)) was applied alone onto lipstick (data omitted).

Claims (4)

The following ingredients:
A powdery lip overcoat cosmetic comprising: (a) a spherical powder having an average particle size of 3 to 50 μm; and (b) a plate-like powder having an average particle size of 10 to 60 μm, wherein the mass ratio of component (b) to the total content of components (a) and (b), ((b)/((a)+(b)), is 0.1 to 0.9 ;
The powdery lip overcoat cosmetic is characterized in that the total content of the component (a) and the component (b) is 80% by mass or more. The powdered lip overcoat cosmetic according to claim 1, wherein the cosmetic contains 10 to 99% by mass of component (a) and 1 to 90% by mass of component (b). 3. The powdery lip overcoat cosmetic according to claim 1 , wherein the average particle size of said component (a) is 5 to 40 μm, and the average particle size of said component (b) is 20 to 50 μm. 4. The powdery lip overcoat cosmetic according to claim 1 , wherein (b)/((a)+(b)) is 0.1 to 0.7.