Solid stick-shaped cosmetic

Abstract

To provide a solid stick-like cosmetic suitable for a makeup cosmetic or the like having an excellent makeup-retaining effect by being applied on a coating film of a base cosmetic such as an eyeshadow or an eyeliner already applied.SOLUTION: The solid stick-shaped cosmetic of the present invention contains 15 to 50 mass% in total of a wax component containing at least stearyl-modified acrylate silicone and selected from the following group A, 20 to 40 mass% of a transparent or white material, and 1 to 25 mass% of a fixing resin component selected from the following group B. Ceresin wax, polyethylene wax, paraffin wax, candelilla wax, jojoba wax, carnauba wax, synthetic wax, fatty acid triglyceride, petrolatum Group B: trimethylsiloxysilicic acid, acrylic silicone SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a solid stick cosmetic preparation suitable for use as a makeup cosmetic preparation such as eyeliner, eye shadow, etc. [Background technology]

[0002] Conventionally, solid stick-type cosmetics such as eyeliners and eye shadows have been obtained by kneading together a binder such as waxes (e.g., fats and oils, waxes, fatty acids, hydrocarbons) or clays, a colorant, and an extender, and shaping the mixture into a stick shape. The colored coating film obtained from these solid stick-type cosmetics is required to have usability such as suppressing secondary adhesion and providing excellent makeup retention.

[0003] Examples of conventional solid stick-type cosmetics include: 1) Patent Document 1 discloses an oily solid cosmetic characterized by blending (A) a specific silicone-polyamide copolymer, (B) neopentyl glycol di-2-ethylhexanoate or di-2-ethylhexyl succinate, and (C) a monoester oil having an ethylhexyl group, and that the appearance of this oily solid cosmetic is transparent to translucent and that it is a stick-shaped cosmetic. 2) Patent Document 2 discloses a stick-type cosmetic containing (A) a wax composition containing polyethylene wax having an average molecular weight of 600 or more and (B) carnauba wax, (C) a film-forming agent, (D) a volatile silicone oil agent, and (E) powder, characterized in that the wax composition is contained in an amount of 4 to 13% by mass based on the total amount of the stick-type cosmetic, and the wax composition contains 50 to 95% by mass of (A) polyethylene wax having an average molecular weight of 600 or more. 3) Patent Document 3 discloses a solid stick-type cosmetic product characterized by containing 15 to 60% by weight of a wax component containing at least stearyl-modified acrylate silicone, and 25 to 40% by weight of a pigment and a filler.

[0004] However, with the solid stick-type cosmetics of Patent Documents 1 and 2, the coating film (including pigments) peels off over time after application, or secondary adhesion occurs to the coating film, resulting in insufficient makeup retention. Furthermore, with the solid stick-type cosmetics of Patent Documents 1 to 3, it is not easy to create a more glamorous look than the underlying cosmetics, and there is room for further improvement in usability. Therefore, the current situation is that they are still not sufficient as solid stick-type cosmetics that meet consumer needs. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2009-84206 A (claims, examples, etc.) [Patent Document 2] JP 2018-177765 A (claims, examples, etc.) [Patent Document 3] JP 2015-34145 A (claims, examples, etc.) Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in view of the above-mentioned problems and current state of the prior art, and aims to solve these problems, and to provide a solid stick-type cosmetic suitable for makeup cosmetics such as eyeliner and eye shadow, which protects the underlying cosmetic, suppresses secondary adhesion, and has excellent makeup retention effect, and also aims to provide a solid stick-type cosmetic which can easily create a more glamorous look for the underlying cosmetic and has an even better feel when used. [Means for solving the problem]

[0007] In view of the above-mentioned problems in the prior art, the present inventors have conducted extensive research and have found that a solid stick-type cosmetic preparation meeting the above objective can be obtained by suitably combining a specific amount of a specific wax component that contains at least stearyl-modified acrylate silicone, a transparent or white bodying material, and a specific adhesive resin component in a range of each of the specified amounts, thereby completing the present invention.

[0008] That is, the solid stick-type cosmetic preparation of the present invention is characterized by containing at least a stearyl-modified acrylate silicone, as well as a total of 15 to 50 mass% of a wax component selected from Group A below, 20 to 40 mass% of a transparent or white bodying material, and 1 to 25 mass% of a fixing resin component selected from Group B below. Group A: Ceresin wax, polyethylene wax, paraffin wax, candelilla wax, jojoba wax, carnauba wax, synthetic wax, fatty acid triglyceride, petrolatum Group B: Trimethylsiloxysilicate, acrylic silicone The solid stick cosmetic preferably has a light transmittance of 35% or more. The solid stick-shaped cosmetic preferably further contains a glitter pigment. [Effects of the Invention]

[0009] According to the present invention, there is provided a solid stick cosmetic suitable for makeup cosmetics such as eyeliner and eye shadow, which protects the underlying cosmetic, suppresses secondary adhesion, and has excellent cosmetic retention effect. A solid stick cosmetic having a light transmittance of 35% or more does not hide the underlying makeup even when applied somewhat thickly, and furthermore, a solid stick cosmetic having excellent makeup retention properties can be obtained. Furthermore, in the case of a solid stick-type cosmetic containing a glittering pigment, in addition to the above-mentioned effects, it is possible to obtain a solid stick-type cosmetic that can add glitter to the color of the base cosmetic and easily create a gorgeous look. The objects and advantages of the invention will be realized and attained by means of the elements and combinations particularly pointed out in the claims. Both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention as claimed. DETAILED DESCRIPTION OF THE INVENTION

[0010] The following describes in detail the embodiments of the present invention. However, please note that the technical scope of the present invention is not limited to the embodiments described in detail below, but extends to the inventions set forth in the claims and their equivalents. Furthermore, the present invention can be implemented based on the contents disclosed in this specification and common general technical knowledge in the relevant field (including design matters and obvious matters).

[0011] The solid stick-type cosmetic preparation of the present invention is characterized by containing at least a stearyl-modified acrylate silicone, and also containing a total of 15 to 50 mass% of a wax component selected from Group A below, 20 to 40 mass% of a transparent or white bodying material, and 1 to 25 mass% of a fixing resin component selected from Group B below. Group A: Ceresin wax, polyethylene wax, paraffin wax, candelilla wax, jojoba wax, carnauba wax, synthetic wax, fatty acid triglyceride, petrolatum Group B: Trimethylsiloxysilicate, acrylic silicone

[0012] The wax component used in the present invention is at least one selected from the group A above: ceresin wax, polyethylene wax, paraffin wax, candelilla wax, jojoba wax, carnauba wax, synthetic wax, fatty acid triglyceride, and petrolatum (each alone or in admixture of two or more; the same applies hereinafter).

[0013] The stearyl-modified acrylate silicone used in the present invention is contained in order to enhance various functions such as coatability and adhesion, and is contained in a wax component having a melting point of 25 to 40°C. The reason why this stearyl-modified acrylate silicone is an essential component is that it has superior application properties and feel when used compared to conventional wax components, and it is also easy to spread immediately after application.If this component is not included, the effects of the present invention cannot be achieved.

[0014] The total content of the wax components of Group A, including this stearyl-modified acrylate silicone, is 15 to 50% by mass (hereinafter simply referred to as "%"), preferably 15 to 30%, of the total amount of the solid stick cosmetic. If the total content of the wax components is less than 15%, it will be difficult for the core of the solid stick-type cosmetic to retain its shape, while if it exceeds 50%, it will be too hard and will not be able to be applied, which is undesirable. Furthermore, in order to optimally exert the effects of the present invention, the content of the stearyl-modified acrylate silicone is desirably 1 to 20%, preferably 1 to 15%, and more preferably 3 to 15%, of the total amount of the solid stick-type cosmetic preparation.

[0015] Examples of the transparent or white filler used in the present invention include at least one of boron nitride, kaolin, talc, mica, calcium carbonate, sericite, zinc oxide, hydroxyapatite, lauroyl lysine, glass powder, silica, and smectite. Kaolin, talc, mica, sericite, zinc oxide, and hydroxyapatite are preferably used in view of their physical properties and shape, as well as the effect of suppressing secondary adhesion and further maintaining makeup, and mica, sericite, zinc oxide, and hydroxyapatite are particularly preferred.

[0016] The total content of the transparent or whitening agent is preferably 20 to 40% of the total amount of the solid stick cosmetic. If the total content of these fillers is less than 20%, it will be difficult for the core of the solid stick-type cosmetic to retain its shape, while if it exceeds 40%, it will be too hard and will be difficult to apply, which is undesirable.

[0017] The adhesive resin component used in the present invention is used as a film-forming agent, and examples thereof include trimethylsiloxysilicate and acrylic silicone, which are in Group B above. The total content of the fixing resin components is desirably 1 to 25%, preferably 10 to 25%, and more preferably 15 to 25%, of the total amount of the solid stick cosmetic preparation, from the viewpoints of film formation and film maintenance after application.

[0018] Furthermore, in addition to the above-mentioned components, the solid stick-type cosmetic composition of the present invention preferably contains oily components, volatile components, gelling agents, etc. in combination, and may further contain optional components used in ordinary solid stick-type cosmetics, such as preservatives, antioxidants, ultraviolet absorbers, chelating agents, moisturizing agents, antioxidants such as vitamin E (dl-α-tocopherol acetate), cosmetic ingredients, fragrances, etc., in appropriate amounts within a range that does not impair the effects of the present invention.

[0019] Oily components that can be used include, but are not limited to, diisostearyl malate, triethylhexanoin, neopentyl glycol diethylhexanoate, sunflower oil, castor oil, squalane, lanolin, tri-2-ethylhexaneglyceryl, neopentyl glycol di-2-ethylhexanoate, sorbitan sesquioleate, olive oil, jojoba oil, macadamia nut oil, polyglyceryl-2 triisostearate, neopentyl glycol dicaprate, capryl eicosenoate, diisopropyl dioleate, isopropyl palmitate, and tri(caprylic / capric)glyceryl. The total content of these oily ingredients is preferably 0 to 15%, more preferably 0 to 10%, of the total amount of the solid stick cosmetic, from the viewpoints of ease of use and smooth application.

[0020] Examples of volatile components that can be used include decamethylcyclopentasiloxane, octamethylcyclotetrasiloxane, methyltrimethicone, dimethicone, dodecane, isododecane, and hydrogenated polyisobutene. The content of these volatile components is preferably 5 to 30%, more preferably 10 to 30%, of the total amount of the solid stick cosmetic preparation, from the viewpoints of ease of use and cosmetic durability.

[0021] Gelling agents that can be used include dibutyl ethylhexanoyl glutamide, dibutyl lauroyl glutamide, glyceryl tri(behenate / isostearate / eicosanedioate), and the like. The content of these gelling agents is desirably 0.5 to 20%, preferably 0.5 to 15%, and more preferably 0.5 to 13%, of the total amount of the solid stick-type cosmetic preparation, from the viewpoints of moldability and application performance.

[0022] The solid stick-type cosmetic preparation of the present invention contains at least the above-mentioned stearyl-modified acrylate silicone, and is prepared by kneading a total of 15 to 50% by mass of a wax component selected from Group A above, 20 to 40% by mass of a transparent or white bodying material, 1 to 25% by mass of a fixing resin component selected from Group B above, and, if necessary, a gelling agent, a volatile component, an oily component, etc., and then producing the desired solid stick-type cosmetic preparation into any shape and size, such as a rectangular parallelepiped, cylindrical, or prismatic shape, using a molding machine or the like in a conventional manner. In terms of formability, application, and cosmetic finish, preferred shapes are solid stick cosmetic products in the shape of a rectangular parallelepiped, solid stick cosmetic products with an elliptical cylindrical cross section, and solid stick cosmetic products in the shape of a rectangular parallelepiped with curved opposing sides, and more preferably, solid stick cosmetic products in the shape of a rectangular parallelepiped with rounded corners and a width of 15 mm or less and a thickness of 5 mm or less, or a rectangular parallelepiped or elliptical cylindrical cross section with a major axis of 15 mm or less and a minor axis of 5 mm or less. Note that the lower limit varies depending on the shape and composition of the solid stick cosmetic product, but it is desirable that the width is 8 mm or more and the thickness is 2 mm or more for a rectangular parallelepiped, and that the major axis of the cross section is 8 mm or more and the minor axis is 2 mm or more for an elliptical cylindrical cross section.

[0023] The solid stick-type cosmetic composition of the present invention thus constituted contains at least the above-mentioned stearyl-modified acrylate silicone, and also contains a total of 15 to 50 mass% of a wax component selected from the above-mentioned Group A, 20 to 40 mass% of a transparent or white bodying material, and 1 to 25 mass% of a fixing resin component selected from the above-mentioned Group B, thereby providing a solid stick-type cosmetic composition that is suitable for makeup cosmetics such as eyeliner and eye shadow, which protects the underlying cosmetic, suppresses secondary adhesion, and has excellent cosmetic retention properties.

[0024] Preferably, a solid stick-type cosmetic having a light transmittance of 35% or more will not conceal the underlying makeup even when applied somewhat thickly, and will have excellent makeup retention properties. In the present invention, "light transmittance (%)" is measured using an ultraviolet-visible-infrared spectrophotometer (U-3300, manufactured by Hitachi, Ltd.) on a 0.25 mm thick eraser piece. An iodine tungsten lamp (750 nm) was used as the light source, and a light transmittance (%) of 0 (zero) indicates opacity, while a higher value indicates greater transparency. A value of 35% indicates that the lines drawn on the base are faintly visible, allowing a faint understanding of the underlying surface. A value of 50% clearly indicates a significant difference in hue between the bare skin and the lines drawn, while a value of 80% indicates a coating that is no different from a coarse, transparent film. To obtain a solid stick-type cosmetic preparation with a light transmittance of 35% or more, the total amount of the stearyl-modified acrylate silicone and wax component is preferably adjusted to 15 to 50% by mass, and the transparent or white filler material is adjusted to 20 to 40% by mass.

[0025] Furthermore, in the case of a solid stick-type cosmetic containing a glittering pigment, in addition to the above-mentioned effects, it is possible to obtain a solid stick-type cosmetic that can add glitter to the color of the base cosmetic and easily create a gorgeous look. Examples of the luster pigment that can be used include at least one of pearl pigments, aluminum powder pigments, metal or metal oxide coated glass flakes, aluminum coated polyester films, etc. The average particle size of these luster pigments is preferably 1 to 100 nm. In this disclosure (including the examples), the "average particle size" refers to a value measured and calculated using a particle size distribution measuring device MT3300II (Microtrac Bell Corporation). The content of these glittering pigments is preferably 0.1 to 30%, more preferably 0.1 to 5%, based on the total amount of the solid stick-type cosmetic. [Example]

[0026] Next, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0027] [Examples 1 to 9 and Comparative Examples 1 to 7] Solid stick-type cosmetics were prepared according to the formulation shown in Table 1 below (blending unit: mass %, total amount 100 mass %) to obtain rectangular solid stick-type cosmetics (10 x 4 x 40 mm).

[0028] Each of the obtained solid stick-type cosmetic compositions was evaluated for application properties, base cosmetic retention effect, brilliance, light transmittance, and resistance to breakage of the core during application using the following evaluation methods. The results are shown in the table below.

[0029] [Method for evaluating coating properties] Each of the obtained solid stick cosmetic compositions was applied to the palm of the hand and various other areas (eyelids, eye rims, etc.), and the applicability was evaluated according to the following evaluation criteria. Evaluation criteria: A: There is absolutely no catching and you can draw even lines. B: It cannot be said to be smooth, but it is possible to draw fairly uniform lines. C: There is a feeling of stickiness, but application is possible. D: Creases and other problems occur, making it impossible to apply evenly.

[0030] [Method for evaluating the retention effect of a base cosmetic] After application to the skin, the applied surface was rubbed with the pad of a finger and evaluated according to the following criteria. Evaluation criteria: A: No change in the drawn line when rubbed with the pad of a finger. B: Slight changes in the drawn lines are observed when rubbed with the pad of a finger. C: Changes in the drawn lines are observed after rubbing with the pad of a finger. D: The drawn lines were erased by rubbing with the pad of a finger.

[0031] [Method for evaluating brightness] After application to the skin, the presence or absence of a radiant feeling was visually observed and evaluated according to the following evaluation criteria. Evaluation criteria: A: High brightness. B: The brightness is not very strong. C: Almost no brightness. D: No brightness.

[0032] [Method for evaluating light transmittance] A test piece molded to a thickness of 0.25 mm was measured using an ultraviolet-visible-infrared spectrophotometer (U-3300, manufactured by Hitachi, Ltd.). An iodine tungsten lamp (750 nm) was used as the light source. A light transmittance (%) of 0 (zero) indicates opacity, and the higher the value, the more transparent the material. Evaluation criteria: S: Average light transmittance is 80% or more. A: The average light transmittance is 50% or more. B: Average light transmittance is 35% or more. C: The average light transmittance is 20% or more. D: The average light transmittance is less than 10%.

[0033] [Method for evaluating the resistance of the core to breaking during application] The breaking strength of each solid stick cosmetic preparation obtained was evaluated as the resistance to breaking during application according to the following criteria. Evaluation criteria: A: It can be applied without any problems and does not break or chip. B: Feels slightly hard or brittle, slight chipping occurs upon application. C: Hard and brittle, prone to breakage during application. D: Breaks and other problems occur, making it impossible to apply the coating normally.

[0034] [Table 1]

[0035] The abbreviations *1 to *7 in Table 1 above are as follows. *1: KP561P (melting point 25-35°C, manufactured by Shin-Etsu Chemical Co., Ltd.) *2: SMARTWAX (melting point 80-86°C, manufactured by Nippon Natural Products Co., Ltd.) *3: Candelilla wax hydrocarbon FC31 (melting point 60-70°C, manufactured by Nippon Natural Products Co., Ltd.) *4: Nomcoat SG (manufactured by Nisshin Oillio Group) *5:TAROX BL-100 (manufactured by Titanium Industries Co., Ltd.) *6: Metashine MC2080PS, average particle size 80 μm (Nippon Sheet Glass Co., Ltd.) *7: VISIONAIRE Sparkling Silver Sea, average particle size 50 μm (manufactured by ECKART)

[0036] As is clear from the results in Table 1 above, the solid stick-type cosmetics of Examples 1 to 9, which fall within the scope of the present invention, were found to be superior in terms of application ease, base cosmetic retention effect, light transmittance, and resistance to breakage of the core during application, compared to Comparative Examples 1 to 7, which fall outside the scope of the present invention. Furthermore, it was found that solid stick-type cosmetics containing a glitter pigment can add glitter to the color of the base cosmetic, in addition to the above effects, and can produce solid stick-type cosmetics that can easily create a gorgeous look. [Industrial Applicability]

[0037] The solid stick cosmetic composition of the present invention can be suitably used as an eye shadow, an eye liner, and the like.

Claims

1. The solid stick cosmetic preparation is characterized by containing at least a stearyl-modified acrylate silicone, and also containing a total of 15 to 50 mass% of a wax component selected from the following Group A, 20 to 40 mass% of a transparent or white bodying material, and 1 to 25 mass% of a fixing resin component selected from the following Group B. Group A: Ceresin wax, polyethylene wax, paraffin wax, candelilla wax, jojoba wax, carnauba wax, synthetic wax, fatty acid triglyceride, petrolatum Group B: Trimethylsiloxysilicate, acrylic silicone

2. 2. The solid stick cosmetic preparation according to claim 1, wherein the light transmittance is 35% or more.

3. 3. The solid stick cosmetic preparation according to claim 1, further comprising a glittering pigment.

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