WO2019203052A1

WO2019203052A1 - Stick cosmetic

Info

Publication number: WO2019203052A1
Application number: PCT/JP2019/015394
Authority: WO
Inventors: 彩や香湊; 黒岩　利光; 英彦伏見; 祐輔中野; 有喜子蛭間
Original assignee: 株式会社資生堂
Priority date: 2018-04-17
Filing date: 2019-04-09
Publication date: 2019-10-24
Also published as: JP2019182816A; JP7210156B2; TW201943405A

Abstract

[Problem] To provide a stick cosmetic having a liquid feel which could not be realized by conventional stick cosmetics, the stick cosmetic having excellent moisture and gloss, and having excellent shape maintenance and moldability while realizing a feel virtually free of stiffening over time. [Solution] This stick cosmetic (1) has an outer layer comprising a composition that contains at least one solidifying agent, and an inner core comprising a composition that contains at least one solidifying agent, wherein the ratio of the hardness of the inner core to the hardness of the outer layer is 0.63 or lower, the hardness of the inner core is less than 25 gf, and the ratio of the cross-sectional area of the inner core to the lateral cross-sectional are of the stick cosmetic (1) is 0.17 or higher.

Description

Stick cosmetic

The present invention relates to a bar-shaped cosmetic, and more particularly to a bar-shaped cosmetic composed of an outer layer and an inner core.

In a stick-shaped cosmetic such as lipstick, a cosmetic composed of a plurality of phases having different compositions is known. A representative example is a lip cosmetic comprising a substantially cylindrical inner core and an outer layer shaped to cover the side surface. For example, Patent Documents 1 and 2 describe stick cosmetics whose inner core is an aqueous cosmetic and whose outer layer is an oily cosmetic.

Further, in Patent Document 3, as a multi-phase molding cosmetic arranged so that a transparent phase is in contact with an inner core and an opaque phase is in contact with an outer layer, for example, the transparent phase is lip gloss and the opaque phase is lipstick. Is applied to the lips, and the upper and lower lips are rubbed together to make a glossy lip makeup.

Patent Document 4 discloses that a gel-like stick such as a soft gel, a hard gel, or a molded gel is used as an outer layer for the purpose of good storage stability against temperature changes, and the melting point of the composition constituting the outer layer is less than the melting point. A dual function product consisting of an inner core having a melting point is described. Patent Document 5 discloses a cosmetic in which a lipstick, a lip gloss, and a lip liner are combined, the lip gloss is used as a core, and a lip liner extending along this axis is disposed on a longitudinal axis on an outer peripheral portion.

The above-described multiphase molded cosmetics have a plurality of properties that are difficult to achieve with a single composition (single phase) in each phase, and both properties are realized by joining them. One phase has an advantage that a desired characteristic can be achieved by supplementing the problems of the other phase. *

JP-A-61-68405 Japanese Patent Laid-Open No. 11-269025 JP 2011-68600 A Special table 2013-522227 gazette Special table 2014-516710 gazette

In the case of stick-shaped cosmetics, it is essential in terms of product structure to add a large amount of solidifying agent in order to maintain the shape and improve the moldability. However, when a large amount of a solidifying agent is blended in the outer layer, a good moist feeling and gloss have been reduced, and there has been a tendency to feel stiffness over time.

The present invention has been made in view of the above problems, has a liquid feeling that cannot be realized with conventional bar-shaped cosmetics, while realizing a good moisture feeling and a feeling that hardly feels wrinkle over time. An object of the present invention is to provide a rod-shaped cosmetic material having good shape maintenance and moldability.

The rod-shaped cosmetic of the present invention is a rod-shaped cosmetic having an outer layer made of a composition containing at least one solidifying agent and an inner core made of a composition containing at least one solidifying agent,
The ratio of the hardness of the inner core to the hardness of the outer layer is 0.63 or less,
The inner core has a hardness of less than 25 gf,
The ratio of the cross-sectional area of the inner core to the cross-sectional area of the bar-shaped cosmetic is 0.17 or more.

The content of the solidifying agent contained in the inner core is preferably 25% by mass or less based on the total amount of the inner core composition.

The content of the solidifying agent contained in the outer layer is preferably 4% by mass or more with respect to the total amount of the outer layer composition. *

The solidifying agent for the inner core or outer layer contains a gelling agent, which is a dextrin fatty acid ester, sucrose fatty acid ester, cellulose derivative, hydrogenated lecithin, aluminum isostearate, organically modified bentonite, hydrophobic anhydrous silica, dibutyl It is preferably at least one selected from ethylhexanoylglutamide, dibutyllauroylglutamide, (bisdialkyl (C14-18) amide (ethylenediamine / hydrogenated dimer linoleic acid) copolymer, and (VP / eicosene) copolymer. .

The solidifying agent for the inner core or the outer layer contains a solid oil, which is cacao butter, coconut oil, horse oil, hydrogenated coconut oil, palm oil, beef tallow, sheep fat, hydrogenated castor oil, paraffin wax, microcrystalline wax. , Ceresin wax, mole, montan wax, Fischer-Trops wax, synthetic wax, polyethylene wax, beeswax, lanolin, carnauba wax, candelilla wax, rice bran wax, geese wax, ibota wax, jojoba oil, rice bran wax, montan wax, kapok wax, bayberry wax, shellac wax Sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, hard lanolin, POE (polyoxyethylene) lanolin alcohol ether, POE lanolin alcohol acetate, POE cholesterol Ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, cetyl palmitate, glyceryl trimyristate, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, cetyl alcohol, stearyl alcohol, behenyl alcohol And at least one selected from among myristyl alcohol, cetostearyl alcohol, cetyl parimitinate, and glyceryl trimyristate.

The rod-shaped cosmetic of the present invention is a rod-shaped cosmetic having an outer layer made of a composition containing at least one solidifying agent and an inner core made of a composition containing at least one solidifying agent, and is suitable for the hardness of the outer layer. The ratio of the hardness of the inner core is 0.63 or less, the hardness of the inner core is less than 25 gf, and the ratio of the cross-sectional area of the inner core to the cross-sectional area of the rod-shaped cosmetic is 0.17 or more. In such a case, it has a liquid feeling that cannot be actually felt, and has a good moisture feeling and a feeling that hardly feels the sensation with time, while maintaining good shape and formability.

FIG. 1 is a schematic view showing one embodiment of the stick-shaped cosmetic of the present invention. 2 is a cross-sectional view taken along the line II of FIG.

Hereinafter, the rod-shaped cosmetic of the present invention will be described in detail.
The rod-shaped cosmetic of the present invention is a rod-shaped cosmetic having an outer layer made of a composition containing at least one solidifying agent and an inner core made of a composition containing at least one solidifying agent, and is suitable for the hardness of the outer layer. The inner core has a ratio of inner core hardness (inner core hardness / outer layer hardness, hereinafter also referred to as hardness ratio) of 0.63 or less, and the inner core hardness is less than 25 gf. The cross-sectional area ratio (the cross-sectional area of the inner core / the cross-sectional area of the bar-shaped cosmetic, hereinafter may be referred to as an area ratio) is 0.17 or more.
Here, the stick-shaped cosmetic is not particularly limited as long as it is a stick-shaped cosmetic, and examples thereof include lipstick, lip balm, balm, foundation, concealer, eye shadow, teak, cosmetic liquid, and perfume.

First, the structure of the stick-shaped cosmetic of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing an embodiment of the stick-shaped cosmetic of the present invention, and FIG. 2 is a cross-sectional view taken along the line II of FIG. The bar-shaped cosmetic 1 of the present invention has an outer layer 2 made of a composition containing at least one solidifying agent, and an inner core 3 made of a composition containing at least one solidifying agent, and has an inner layer with respect to the hardness of the outer layer 2. The hardness ratio of the core 3 is 0.63 or less, the hardness of the inner core 3 is less than 25 gf, and the ratio of the cross-sectional area of the inner core 3 to the cross-sectional area of the bar-shaped cosmetic 1 is 0.17 or more. In addition, in FIG. 1, the thing using the feeding container 4 which accommodates the cylinder (not shown) filled with the rod-shaped cosmetics inside, and extrudes the cosmetics in a cylinder through the push rod to the axial direction upper direction is shown. ing.

The outer layer 2 may completely enclose the inner core 3, or the inner core 3 may be exposed at the tip of the stick-shaped cosmetic 1. 1 and 2 show a case where the outer layer and the inner core have both circular cross sections, the outer layer and the inner core may have different cross sections. The outer layer may have an elliptical shape, a teardrop shape, a polygonal shape, etc., or the inner core may have a characteristic shape such as a rhombus, star shape, heart shape, lip shape, etc. Good.

When the ratio of the hardness of the inner core 3 to the hardness of the outer layer 2 is 0.63 or less, the shape maintenance and moldability of the bar-shaped cosmetic can be improved. The ratio of the hardness of the inner core 3 to the hardness of the outer layer 2 is more preferably 0.58 or less, and even more preferably 0.25 or less. The lower limit of the ratio of the hardness of the inner core 3 to the hardness of the outer layer 2 is more preferably 0.1 or more, and even more preferably 0.13 or more, from the viewpoint of bending or stability.

When the hardness of the inner core 3 is less than 25 gf, it has a liquid feeling that cannot be realized with a stick-shaped cosmetic material, and has a good moisture feeling and gloss, or a feeling that hardly feels wrinkles over time. Can do. The hardness of the inner core 3 is preferably 20 gf or less, and more preferably 15 gf or less. The lower limit value of the hardness of the inner core 3 is preferably 4 gf or more, and more preferably 7 gf or more, from the viewpoint of bending or stability.

The hardness of the outer layer may be adjusted so that the hardness of the inner core 3 is less than 25 gf and the ratio of the hardness of the inner core 3 to the hardness of the outer layer 2 can be adjusted to 0.63 or less, and is preferably in the range of 25 to 100 gf. The range is preferably 80 gf.

Here, the hardness is the penetration hardness when the rheometer adapter is infiltrated into the sample, and the stress when the adapter of 1 mmφ enters the sample 10 mm from above at a measurement temperature of 25 ° C. at a speed of 30 mm / min. The peak value (unit: gf).

As shown in FIG. 1, the cross-sectional area of the bar-shaped cosmetic material is an area of a vertical cross section with respect to the axial direction (vertical direction in FIG. 1) of the bar-shaped cosmetic material. The cutting position for measuring the cross-sectional area is between 15 to 20 mm below the position where the diameter of the bar-shaped cosmetic is a constant diameter, for example, as shown in FIG. If the taper is gradually becoming narrower, or it is cut obliquely with respect to the axial direction of the feeding container or has a specific shape such as several cut surfaces, these Cut from 15 to 20 mm below from the position where the shape is not formed (position P in FIG. 1). The cross-sectional area is the average value measured at 5 points between 15 and 20 mm.

1 and 2 show the case where the cross-section of the bar-shaped cosmetic is circular, the outer layer of the bar-shaped cosmetic is oval, teardrop, polygonal, etc., and the inner core is specific. In the case of a shape (for example, star shape, heart shape, lip shape, etc.), the same position and method are used for measurement.

The ratio of the cross-sectional area of the inner core to the cross-sectional area of the bar-shaped cosmetic material is 0.17 or more, so that the shape is maintained and molded while having a good moisture feeling and a feeling that almost no wrinkle over time is felt. The property can also be good. The ratio of the cross-sectional area of the inner core to the cross-sectional area of the bar-shaped cosmetic is more preferably 0.25 or more, and the inner core can be made thicker so that a large amount of oil or the like can be blended in the inner core, thereby further improving the above effect. From the viewpoint that it can be achieved, it is more preferably 0.5 or more. From the viewpoint of moldability, the upper limit of the ratio of the cross-sectional area of the inner core to the cross-sectional area of the bar-shaped cosmetic is preferably 0.9 or less, and more preferably 0.85 or less.

The stick-shaped cosmetic of the present invention has an outer layer made of a composition containing at least one solidifying agent and an inner core made of a composition containing at least one solidifying agent. It is preferable to blend more solidifying agent contained in the outer layer than the solidifying agent contained in the inner core. By blending in such a manner, the maintenance of the shape and the securing of the moldability can be improved.
Examples of the solidifying agent include a gelling agent and a solid oil.

Gelling agents include dextrin fatty acid ester, sucrose fatty acid ester, cellulose derivative, hydrogenated lecithin, aluminum isostearate, organic modified bentonite, hydrophobic anhydrous silica (dimethylsilylated silica), dibutylethylhexanoylglutamide, dibutyllauroyl It is preferably at least one selected from glutamid, (bisdialkyl (C14-18) amide (ethylenediamine / hydrogenated dimer linoleic acid) copolymer, and (VP / eicosene) copolymer.
These gelling agents may be used alone or in appropriate combination.

Solid oils include cocoa butter, palm oil, horse oil, hydrogenated palm oil, palm oil, beef tallow, sheep fat, hydrogenated castor oil, paraffin wax (linear hydrocarbon), microcrystalline wax (branched saturated hydrocarbon), ceresin Wax, Mokuro, Montan wax, Fischer-Tropx wax, Synthetic wax, Polyethylene wax, Beeswax, Lanolin, Carnauba wax, Candelilla wax, Rice bran wax (Rice wax), Geyrou, Ibotaro, Jojoba oil, Rice bran, Montan wax, Kapok wax, Bayberry wax , Shellac wax, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, hard lanolin, POE (polyoxyethylene) lanolin alcohol ether, POE lanolin alcohol acetate, PO Cholesterol ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, cetyl palmitate, glyceryl trimyristate, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, cetyl alcohol, stearyl alcohol, It is preferably at least one selected from behenyl alcohol, myristyl alcohol, cetostearyl alcohol, cetyl parimitate, and glyceryl trimyristate.
These solid oil components may be used alone or in appropriate combination.

The content of the solidifying agent contained in the inner core is preferably 25% by mass or less, more preferably 0.1 to 20% by mass, and more preferably 0.1 to 10% by mass with respect to the total amount of the inner core composition. More preferably. When the content of the solidifying agent contained in the inner core is 25% by mass or less, it becomes easy to adjust the hardness of the inner core to less than 25 gf, and there is almost no moist feeling and glossiness over time in the stick-shaped cosmetic. It is possible to improve the feeling of use that is not felt.
All of the solidifying agent contained in the inner core may be a gelling agent. In this case, the content is preferably 0.1 to 25% by mass relative to the total amount of the inner core composition, The content is more preferably 20% by mass, and further preferably 0.1 to 10% by mass.

The content of the solidifying agent contained in the outer layer is preferably 4% by mass or more, more preferably 4 to 25% by mass, and still more preferably 4 to 20% by mass with respect to the total amount of the outer layer composition. . When the content of the solidifying agent contained in the outer layer is 4% by mass or more, it becomes easy to adjust the ratio of the hardness of the inner core to the hardness of the outer layer to 0.63 or less, thereby maintaining the shape and formability of the bar-shaped cosmetic. It can be made better.
All of the solidifying agent contained in the outer layer may be a solid oil, and the content in that case is preferably 4 to 25% by mass, and preferably 4 to 20% by mass, based on the total amount of the outer layer composition. More preferably, it is 4 to 15% by mass.

The rod-shaped cosmetic may contain a liquid oil. Examples of liquid oils include liquid oils such as olive oil, castor oil, macadamia nut oil, evening primrose oil, liquid waxes such as jojoba oil and liquid lanolin, liquid hydrocarbons such as liquid paraffin, squalane, polybutene, and volatile hydrocarbons, Liquid dibasic acids such as liquid fatty acid monoesters such as isopropyl myristate, isopropyl palmitate, cetyl 2-ethylhexanoate, octyldodecyl myristate, octyl stearate, octyl palmitate, diisopropyl adipate, di-2-ethylhexyl sebacate, etc. Liquid glycol esters such as diesters, neopentyl glycol dicaprate, glyceryl tri-2-ethylhexanoate, glyceryl triisostearate, diglyceryl diisostearate, triisostearate Liquid polyglycerin esters such as diglyceryl acid, liquid pentaerythritol esters such as tetra-2-ethylhexanoic acid pentaerythritol, dioctanoic acid pentaerythritol, tri-2-ethylhexanoic acid trimethylolpropane, triisostearic acid trimethylolpropane Liquid trimethylolpropane esters such as liquid, liquid esters such as liquid malic acid esters such as diisostearyl malate, liquid higher fatty acids such as isostearic acid and oleic acid, liquid higher grades such as isostearyl alcohol, oleyl alcohol, and octyldodecanol Liquid chain polysiloxanes such as alcohol, dimethylpolysiloxane, methylphenylpolysiloxane, diphenylpolysiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentasiloxane Sun, liquid cyclic silicones such as dodecamethylcyclohexasiloxane, liquid silicone oils such as liquid-modified polysiloxanes such as amino-modified polysiloxanes, alkyl-modified polysiloxanes and fluorine-modified polysiloxanes, and liquid fluorine compounds such as perfluoropolyether Can be mentioned.
These liquid oil components may be used alone or in appropriate combination.

The content of the liquid oil contained in the inner core is preferably 75 to 99.9% by mass, more preferably 80 to 99.9% by mass, from the viewpoint of glossiness and moist feeling over time, More preferably, it is 75 to 99.9% by mass. The content of the liquid oil contained in the outer layer is preferably 75 to 96% by mass, more preferably 80 to 96% by mass, and 85 to 96% by mass from the viewpoint of folding and stability. Is more preferable.

棒 Color material can be added to the bar-shaped cosmetic. Examples of color materials include bengara, yellow iron oxide, black iron oxide, cobalt oxide, ultramarine, bitumen, titanium oxide, zinc oxide, mica titanium, iron oxide-treated mica titanium, glass flakes, fish phosphorus foil, bismuth oxychloride, Red 228, Red 226, Blue 404, Yellow 5, Red 505, Red 230, Red 223, Orange 201, Red 213, Yellow 204, Yellow 203, Blue 1 and Green 201 No., purple 201, red 202, red 204 and the like. One or two or more color materials can be arbitrarily selected and blended. The color material can also be blended as a processed product that has been subjected to a hydrophobic treatment or the like.

The coloring material is preferably contained in an amount of 3 to 60% by mass based on the total amount of the stick-shaped cosmetic. More preferably, it is 15 to 50% by mass.

In the stick-shaped cosmetic, other components can be appropriately blended within a range that does not impair the effects of the present invention. For example, talc, mica, sericite, synthetic mica, calcined mica, calcined sericite, extender pigments such as lauroyl lysine, silica, polyethylene powder, polymethyl methacrylate, nylon powder, spherical powder such as organopolysiloxane elastomer, surface activity Agents, humectants, polyhydric alcohols, thickeners, polymers, lower alcohols, UV absorbers, vitamins, whitening agents, antioxidants, preservatives, refreshing agents, fragrances, water and the like.

The stick-shaped cosmetic of the present invention can be produced according to a known method by blending the above components. For example, in a mold in which the inner core is previously closed with a rod-shaped mold, the constituent components of the composition constituting the outer layer are heated and melted, poured into this, cooled and solidified, and then the inner core mold is removed, Examples include a method of heating and melting the constituent components of the composition that forms the inner core in the void portion, pouring it, and cooling and solidifying it. By changing the thickness of the rod-shaped mold inserted into the inner core, the constituent ratio of the inner core and the outer layer can be adjusted.

Next, the present invention will be described more specifically with reference to examples. The present invention is not limited in any way by the following examples. The blending amount is mass% unless otherwise specified.

The components described in Table 1 were mixed, heated and melted uniformly to prepare compositions 1 to 10. Each of the prepared compositions was poured into a special container having a depth of 50 mm, left overnight, and left in a thermostatic bath at 25 ° C. for 2 hours or more as a sample. The sample was placed in “Rheometer NRM-2002J” manufactured by Rheotech Co., Ltd. Then, the average value was obtained by measuring three times.
Table 1 shows the measurement results of hardness and the respective formulations.

Example 1
Each component of the composition 3 shown in Table 1 (total amount of 100% by mass) mixed in a mold (diameter 12 mm) whose inner core is closed with a rod-shaped mold (diameter 5 mm), and heated and melted uniformly. Was cooled and solidified. Next, the inner core rod-shaped mold was extracted, and each component of the composition 5 shown in Table 1 (total amount of 100% by mass) was mixed, heated and melted into the gap portion, poured into a uniform, and cooled. . The resulting double-structured stick-shaped cosmetic (stick-like lipstick) was taken out of the mold and stored in a container.

(Examples 2 to 9, Comparative Examples 1 to 5)
In the same manner as in Example 1, using the composition shown in Table 1, bar-shaped cosmetics of Examples 2 to 9 and Comparative Examples 1 to 5 having the outer layer and inner core shown in Table 2 were produced. In Examples 2, 3, 8, and 9 and Comparative Examples 3 and 4 having an area ratio of 0.5, a rod-shaped mold having a diameter of 8.5 mm was used. In Examples 4 and 5 having an area ratio of 0.6, the diameter was 9.3 mm. In Comparative Examples 1 and 2 having an area ratio of 0.17, a bar-shaped mold having a diameter of 5 mm was used. In Comparative Example 5 having an area ratio of 0.1, a bar-shaped mold having a diameter of 4 mm was used, and In Example 7, a rod-shaped mold having a diameter of 11 mm was used, and in Example 6 having an area ratio of 0.9, a rod-shaped mold having a diameter of 11.5 mm was used.

(Evaluation methods)
(Moist feeling)
10 female panels evaluated the moist feeling when the manufactured stick-shaped cosmetic was applied to the lips. The evaluation was a three-step sensory evaluation (score) based on the following scoring criteria for the moisture feeling when the sample was applied to the lips. Based on the average score, the following evaluation criteria were used.
(Score)
3 points: feels very moist 2 points: feels moist 1 point: feels less moist (evaluation criteria)
A: Score average value 2.5 points or more and less than 3 points
B: Score average value 1.5 points or more and less than 2.5 points
C: Score average 1 point or more and less than 1.5 points

(luster)
The gloss when the manufactured stick-shaped cosmetic was applied to the lips was evaluated by 10 female panels. The evaluation was a three-step sensory evaluation (score) based on the following scoring criteria for the gloss when the sample was applied to the lips. Based on the average score, the following evaluation criteria were used.
(Score)
3 points: very shiny 2 points: shiny 1 point: less shiny (evaluation criteria)
A: Score average value 2.5 points or more and less than 3 points
B: Score average value 1.5 points or more and less than 2.5 points
C: Score average 1 point or more and less than 1.5 points

(A feeling of melting)
Ten female panels evaluated the melting feeling when the manufactured stick-shaped cosmetic was applied to the lips. The evaluation was a three-step sensory evaluation (score) based on the following scoring criteria for the melting feeling when the sample was applied to the lips. Based on the average score, the following evaluation criteria were used.
(Score)
3 points: Feels like a gel that melts very much 2 points: Feels like a gel that melts like 1 point: Feels like a gel that melts like a gel
(Evaluation criteria)
A: Score average value 2.5 points or more and less than 3 points
B: Score average value 1.5 points or more and less than 2.5 points
C: Score average 1 point or more and less than 1.5 points

(Break)
10 female panels were obliged to use the manufactured bar-shaped cosmetics at least once a day, and the condition of the bar-shaped cosmetics after being used for two weeks was confirmed.
A: Number of people with folds 0
B: Number of people with breakage 1-2 people C: Number of people with breakage 3 or more Table 2 shows the prescription and evaluation results.

As shown in Table 2, the stick-shaped cosmetic material of the present invention has a good moisture feeling, glossiness, and a feeling of melting, while realizing a feeling that hardly feels wrinkles over time, and without occurrence of folding, Maintenance and formability were also good.

On the other hand, even when the ratio of the hardness of the inner core to the hardness of the outer layer is 0.63 and the ratio of the cross-sectional area of the inner core to the cross-sectional area of the bar-shaped cosmetic is 0.17, the inner core hardness is 25 gf. In No. 1, there was no feeling of moisture, a feeling of melting, and the feeling was bad. When the hardness of the inner core is 25 gf, even when the ratio of the cross-sectional area of the inner core to the cross-sectional area of the bar-shaped cosmetic is increased to 0.5, there is no moist feeling or melting feeling as shown in Comparative Example 4, and Could not be improved.

Moreover, even if the hardness of the inner core is 20 gf, when the ratio of the hardness of the inner core to the hardness of the outer layer is larger than 0.63, there is no moist feeling or melting feeling as shown in Comparative Example 2, and the feeling is improved. I couldn't. Further, even when the hardness of the inner core is 10 gf, when the ratio of the cross-sectional area of the inner core to the cross-sectional area of the bar-shaped cosmetic is less than 0.17, there is no moist feeling or melting feeling as shown in Comparative Example 5, Could not be improved. Furthermore, when the ratio of the hardness of the inner core to the hardness of the outer layer is larger than 0.63, as shown in Comparative Example 3, it is easy to break even if the touch can be improved, and the shape maintenance and formability are poor. It was.

Table 5 shows a formulation example of the bar-shaped cosmetic material of the present invention. Table 3 shows the outer layer prescription, Table 4 shows the inner core prescription, and Table 5 shows the combinations and area ratios.

1 Bar-shaped cosmetic 2 Outer layer 3 Inner core 4 Feeding container

Claims

A bar-shaped cosmetic comprising an outer layer made of a composition containing at least one solidifying agent and an inner core made of a composition containing at least one solidifying agent,
The ratio of the hardness of the inner core to the hardness of the outer layer is 0.63 or less,
The inner core has a hardness of less than 25 gf,
The rod-shaped cosmetic material having a ratio of a cross-sectional area of the inner core to a cross-sectional area of the rod-shaped cosmetic material of 0.17 or more.
The stick-shaped cosmetic according to claim 1, wherein the content of the solidifying agent contained in the inner core is 25% by mass or less based on the total amount of the inner core composition.
The stick-shaped cosmetic according to claim 1 or 2, wherein the content of the solidifying agent contained in the outer layer is 4% by mass or more based on the total amount of the outer layer composition.
A gelling agent is included in the solidifying agent of the inner core or the outer layer, and the gelling agent is dextrin fatty acid ester, sucrose fatty acid ester, cellulose derivative, hydrogenated lecithin, aluminum isostearate, organic modified bentonite, hydrophobic anhydrous silica, A dibutylethylhexanoylglutamide, a dibutyllauroylglutamide, a (bisdialkyl (C14-18) amide (ethylenediamine / hydrogenated dimer linoleic acid) copolymer, or a (VP / eicosene) copolymer. A bar-shaped cosmetic according to 1, 2 or 3.
The solidifying agent of the inner core or the outer layer contains a solid oil, and the solid oil is cocoa butter, coconut oil, horse oil, hydrogenated coconut oil, palm oil, beef tallow, sheep fat, hydrogenated castor oil, paraffin wax, microcrystalline Wax, ceresin wax, molasses, montan wax, Fischer-Trops wax, synthetic wax, polyethylene wax, beeswax, lanolin, carnauba wax, candelilla wax, rice bran wax, gay wax, ibota wax, jojoba oil, rice bran wax, montan wax, kapok wax, bayberry wax, Shellac wax, sugarcane wax, lanolin fatty acid isopropyl, hexyl laurate, reduced lanolin, hard lanolin, POE (polyoxyethylene) lanolin alcohol ether, POE lanolin alcohol acetate, POE colles Roll ether, lanolin fatty acid polyethylene glycol, POE hydrogenated lanolin alcohol ether, cetyl palmitate, glyceryl trimyristate, myristic acid, palmitic acid, stearic acid, behenic acid, 12-hydroxystearic acid, cetyl alcohol, stearyl alcohol, The stick cosmetic according to any one of claims 1 to 4, which is at least one selected from behenyl alcohol, myristyl alcohol, cetostearyl alcohol, cetyl parimitinate, and glyceryl trimyristate.