JPS63139107A - Stick-like cosmetic and production thereof - Google Patents

Abstract

PURPOSE:To obtain the titled cosmetic, capable of suppressing volatilization of a volatile oil with time as well as improved breaking strength and having excellent usability, by coating and protecting an inner phase consisting of an oil cosmetic base containing a volatile oil with a oily solid base containing a specific solid oil. CONSTITUTION:A stick-like cosmetic having a structure of integrated an inner phase part with outer phase part, the inner phase part consisting of an oily cosmetic base containing 3-30wt% volatile oil, the outer phase consisting of an oily solid base containing 20-80wt% solid oil. A volatile hydrocarbon oil or volatile silicone oil having <=300 deg.C boiling point is used as the volatile oil and carnauba wax, microcrystalline wax, etc., having >=60 deg.C melting point are used as the solid oil. The aimed substance is obtained by casting the molten oily solid base into a molding vessel, solidifying the oily slid base, removing the central part to form a hollow cylindrical outer phase part, filling the molten oily cosmetic base containing the volatile oil therein, solidifying and integrally molding the above-mentioned parts.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a useful stick-shaped cosmetic composition, and more specifically, the internal phase portion, which is an oil-based cosmetic base material containing a volatile oil agent, comprises: The present invention relates to a stick-shaped cosmetic having an integrated structure that is covered and protected by an outer phase portion which is an oily solid base material containing a specific solid oil agent.

In other words, the present invention suppresses volatilization of volatile oils, has good stability over time, has sufficient bending strength in terms of impact resistance, is easy to use, and has good adhesion to the skin during use. ,
The object of the present invention is to provide a stick-shaped cosmetic that has excellent cosmetic effects such as uniform formation of a coating film and long-lasting makeup.

[Conventional technology] Conventionally, stick-shaped cosmetics such as foundation, blusher, eye shadow, lipstick, etc. have been produced in solid, semi-solid, or
It is made by mixing and dispersing liquid oil-based raw materials and powder raw materials as the main ingredients and molding it into a stick shape.The type and blending ratio of oils and powders can be changed depending on the purpose and effect of cosmetics. It has been successfully commercialized.

When commercializing this stick-shaped cosmetic, we need to ensure fluidity during heating and melt filling from the pouring surface, ensure ease of use such as spreading and cosmetic effect when applied from the cosmetic surface, and prevent bending and durability from the viewpoint of strength. Important design points are ensuring impact resistance and ensuring stability over time by preventing ginseng sweating from a storage perspective, and formulations were usually formulated with these considerations in mind.

For example, in order to achieve good fluidity during filling and good spreadability during use, it is necessary to increase the ratio of oil to powder in the formulation, use a relatively large amount of liquid oil in the oil composition, or improve the properties of the powder. Since then, efforts have been made to use materials with low oil absorption.

In addition, various studies and attempts have been made to improve conventional products by adding cosmetic properties and functions such as adhesion to the skin, uniform film formation, and long-lasting makeup to enhance the makeup effect. In recent years, techniques have been known in which volatile oils such as low-boiling hydrocarbons and low-boiling silicone oils are used as part of the oil to improve usability and makeup durability. In other words, by blending a volatile oil into a cosmetic base material, it has the effect of improving the feeling of use, such as giving a light feel without the stickiness of oil, and it also dries quickly after application, creating a uniform makeup film. This is because the effect of preventing makeup from fading is achieved by forming the makeup layer.

[Problems to be solved by the invention] However, when formulating stick cosmetics, it is important to guarantee the quality described above, and it is important to select the types of oils, powders, etc. to be used, and the blending ratio and amount. The actual situation is that there are considerable restrictions on the composition of the powder system and oil system due to the composition of the powder system. This has led to the problem that it has been difficult to fully demonstrate the required cosmetic functions and expand the range of products.

For example, if you increase the amount of solid/semi-solid oils or highly adhesive powders to improve the longevity of the makeup effect and the adhesion to the skin, you may experience hardness and stickiness to the touch, as well as poor spreadability during use. It begins to appear. While improving these, if liquid oils or powders with good extensibility are used too much in order to obtain products that form a uniform cosmetic film, the bending strength will decrease, and makeup durability and adhesion will deteriorate. Put it away. Therefore, it has been difficult to obtain a satisfactory product that has good feel and spreadability during use, excellent makeup retention, adhesion to the skin, and uniform makeup film formation.

Furthermore, as mentioned above, efforts have been made to apply volatile oils to stick-shaped cosmetics in order to improve the texture and the durability of cosmetic effects. However, in this case, even if it can be molded into a stick shape, the bending strength will decrease, or the airtightness of normal containers will be poor, and the volatile oil will gradually evaporate, resulting in changes in appearance such as low surface gloss and thinning. This phenomenon occurs, the feel of the product also deteriorates, and more importantly, it does not adhere to the skin due to changes over time, making it difficult to apply makeup, resulting in a significant loss of quality. Therefore, in order to prevent volatile oils from volatilizing over time, efforts have been made to improve the storage capacity by examining the formulation ingredients and the airtightness of the container, but these efforts have not been fully satisfactory for commercialization, and the costs are high. This made it difficult to put it into practical use.

[Means for Solving the Problems] In view of the above circumstances, the present inventors have conducted intensive research to solve the problems of conventional stick-type cosmetics and to develop products with good stability and sensory characteristics. As a result of repeating this process, the internal phase is made of an oil-based cosmetic base material containing a volatile oil, and by covering and protecting the inner phase with an oil-based solid base containing a specific solid oil, the volatile oil can be effectively absorbed over time. They discovered that it is possible to obtain a stick-shaped cosmetic that suppresses vaporization, has improved stability and bending strength, and is excellent in usability and cosmetic effects, and based on this knowledge, the present invention was completed.

That is, the present invention has a structure in which an internal phase part and an external phase part are integrated, and the internal phase part absorbs volatile oil at a rate of 3% per total amount of the internal phase part.
Consisting of an oil-based cosmetic base material that essentially contains an oil-based cosmetic base material in the range of ~30% by weight, and the external phase part is made of an oil-based solid base material that contains a solid oil agent with a melting point of 80 ° C. or higher in the range of 20-80% by weight based on the total amount of the external phase part. The present invention relates to a stick-shaped cosmetic characterized by:

The configuration of the present invention will be explained below.

The inner layer of the stick-shaped cosmetic according to the present invention is composed of an oil-based cosmetic base material that essentially contains a volatile oil agent.

The volatile oil is not particularly limited as long as it can be used as a cosmetic component and has the property of quickly volatilizing and drying on the skin. These volatile oils include:
Volatile hydrocarbon oils and volatile silicone oils having a boiling point of about 300° C. or less can be mentioned, and can be preferably used in the present invention. More specific examples include low molecular weight isoparaffinic hydrocarbon oil, low molecular weight chain dimethylpolysiloxane, cyclic octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane. In the present invention, one or more of these may be selected and blended as necessary. These are preferable because they dry quickly on the skin, have a light feel, and are safe for the skin.

Moreover, the structure of the oil-based cosmetic base material other than the volatile oil agent is manufactured using an oil agent as a main component, and basically consists of oil-based cosmetic ingredients. Cosmetics of this type generally include products in stick or solid form, such as foundations, blushers, lipsticks, eye shadows, lip balms, eye sticks, hair sticks, and the like. In the present invention, the material is not particularly limited, as long as it is selected from oils, powders, etc. that have been conventionally used in cosmetics, and can be used as raw materials for cosmetics.

As an oil component, solid e semi-solid 9 that can be used in cosmetics is used.
It is a liquid oil, and includes hydrocarbons, fats and oils, waxes, ester oils, glycerides, fatty acids, higher alcohols, silicone oils, etc., regardless of animal oil, vegetable oil, or synthetic oil. More specifically, liquid paraffin,
Squalane, petrolatum, paraffin wax, ceresin wax, microcrystalline wax, castor oil,
Japanese wax, beeswax, candelilla wax, carnauba wax, lanolin, isopropyl myristate, isopropyl valmitate, glycerin fatty acid ester,
Octyldodecyl myristate, rosin acid pentaerythritol ester, stearic acid, lauric acid, oleic acid, behenic acid, cetanol, stearyl alcohol,
Examples include methylpolysiloxane, methylphenylpolysiloxane, methylhydrodienepolysiloxane, stearic acid monoglyceride, and oleic acid monoglyceride, which may be used in combination as necessary.

In addition, in order to impart a makeup effect, a powder component that can be used in cosmetics can be blended into a makeup cosmetic. Examples of the powder components include extender pigments, white pigments, colored pigments, organic powders, pearlescent agents, dyes, and the like.

More specifically, talc, kaolin, mica, calcium carbonate, magnesium carbonate, magnesium silicate, silica, magnesium aluminum silicate, titanium oxide, zinc oxide, red iron oxide.

Yellow iron oxide, black iron oxide, gunjo, tar pigment, mica titanium, iron mica titanium oxide, bismuth oxychloride, nylon powder, polyethylene powder, methyl methacrylate powder, styrene powder, polytetrafluoroethylene powder, silk powder, crystalline cellulose , starch, etc. may be used in combination, if necessary.

Gelling agents such as fatty acid esters, metal soaps, surfactants,
In addition to lecithin, other additives such as ultraviolet absorbers, polymer compounds, fragrances, preservatives, antioxidants, humectants, skin beautifying ingredients, etc. may be blended.

The oil-based cosmetic base material in the present invention includes the above-mentioned volatile oil agent,
It is composed of ingredients selected from oils, powders, etc., depending on the type of cosmetic and the cosmetic purpose. At this time, the amount of volatile oil compounded is preferably in the range of 3 to 30% by weight based on the total amount of the internal phase. That is, if it is less than this range, the added effect will not be sufficiently exhibited, and it will be difficult to expect usability and cosmetic effects in the present invention, and if it exceeds this range, it will be difficult to maintain sufficient strength in stick form. Therefore, the above range is sufficient for the present invention.

In addition, in the present invention, when formulating the oil-based cosmetic base material that will be the internal phase part, it goes without saying that from the relationship with the external phase part, an appropriate hardness that can guarantee the strength in the stick form of the final product is required. It is necessary to prepare the above ingredients by combining them. Further, the oil-based cosmetic base material may be manufactured according to conventional methods.

Next, the outer phase part, which covers and protects the inner phase part, suppresses volatilization of the volatile oil over time, maintains the stick form, and guarantees bending strength, and therefore needs to have appropriate hardness. Therefore, the outer phase portion in the present invention is basically composed of an oily solid base material containing a solid oil agent. For the present invention, it is preferable that the solid oil agent has a melting point of 60° C. or higher and has particularly structured crystallinity or microcrystalline properties because a stable and good external phase film can be obtained. Used indispensably. Examples of these solid oil agents include carnauba wax, candelilla wax, paraffin wax, microcrystalline wax, ceresin wax, and polyethylene wax, and one or more of these may be used in combination as appropriate.

Further, the amount of the essential solid oil agent blended in the oily solid base material is preferably in the range of 20 to 80% by weight based on the total amount of the external phase. In other words, if it is less than this range, it will not form an external phase film, or it will be brittle and not strong enough, and if it exceeds this range, it will not only become too hard and have a poor feel, but also be prone to cracking and cracking. There is,
This is because it becomes difficult to obtain a good external phase part.

The oily solid base material serving as the external phase portion in the present invention is mainly composed of solid, semi-solid, and liquid oil raw materials at room temperature in addition to the above-mentioned essential solid oil. These oils are not particularly limited as long as they can be used in cosmetics, but they must be compatible with the essential solid oils in order to obtain the external phase expected from the internal phase protection function and texture of the final product. It is important to select and combine them as needed, taking into consideration stability and strength.

Incidentally, the oily solid base material may be composed of the above-mentioned oil agent raw material, but
There is no problem in adding pearlescent agents, colorants, ingredients for beautiful skin, perfumes, preservatives, antioxidants, etc. as additives to the extent that they do not interfere with the present invention, if necessary.

The stick-shaped cosmetic of the present invention is configured as described above,
It stably contains volatile oil. Conventionally, this type of product generally consisted of a solid oil backbone and an oil component or powder component, so it felt oily and sticky.
It had poor extension. The present invention contains a volatile oil agent, which spreads well when used, gives a soft and refreshing feeling, and forms a uniform slender membrane, resulting in long-lasting makeup. It is. According to the inventors of the tree, especially in the case of makeup cosmetics, spherical or porous spherical fine powder is contained in the powder component in an amount of 3 to 30% per total amount of the internal phase.
It has also been found that when the amount of 20% by weight is added, spreadability and stickiness during application are further improved, resulting in favorable results.

Conventionally, stick-shaped cosmetics having a knee-layered structure consisting of an inner phase part and an outer phase part have been manufactured by using concave and convex molding members, which are molding frames, to form either the inner phase part or the outer phase part. It was common practice to mold the cosmetic first, then integrally mold it, and then place the resulting cosmetic in a suitable container. However, in such cases, a molding member that serves as a mold and a fixing member or device to hold it are required, and the process is cumbersome because the molded stick-shaped cosmetics must be placed in containers one by one. Met.

When producing the stick-shaped cosmetic of the present invention, the present inventors investigated a more efficient production method, although it is possible to use the conventional method described above. A predetermined amount is directly poured and filled, and after a certain amount of time, the excess oily solid base material is removed to form a hollow cylindrical outer phase part, and then the molten oily cosmetic base material is poured into the hollow cylindrical outer phase part and filled. We have also found that the stick-shaped cosmetic can be produced very easily by solidifying and cultivating it in an integrated mold.

That is, the stick-shaped cosmetic of the present invention can be efficiently manufactured by the molding method described below.

First, the oily solid base material that will become the external phase is melted at a predetermined temperature in a melt-filling machine, and then poured into a molded container such as a stick-shaped container with an opening at the top, a medium plate, or a capsule, for example, as described above. Pour into a molded container and fill it up. Then, before the filled oil-based solid base material is completely solidified, or immediately after filling, the molded container is inverted, and the unsolidified excess oil-based solid base material is removed to create an appropriate wall thickness on the inner peripheral surface of the container. A film is formed and a hollow cylindrical outer phase portion is molded. Next, the molded container is returned to its original state, and the oil-based cosmetic base material that has been melted in advance using another melt-filling machine is poured into the hollow cylindrical outer phase to fill it. Thereafter, it is cooled and solidified to obtain a stick-shaped cosmetic in which the inner phase portion and the outer phase portion are integrated. still,
The oily solid base material removed as surplus can be recovered and used again.

In the present invention, if such a method is followed, the target stick-shaped cosmetic can be easily produced, which is useful for work.

In addition, the thickness of the outer phase can be adjusted to a desired value by changing the composition and ratio of the oily solid base material, controlling the temperature of the molded container during filling, the filling temperature, removal time, or removal temperature of the oily solid base material. It can be made into

In the present invention, the ratio of the thickness in the cross section of the inner part and the outer part is not particularly limited and can be set arbitrarily, but the thickness of the outer part is determined according to the cosmetic purpose of the inner part. - Make full use of the effect and select according to the need, such as suppressing volatilization of volatile oil agents and guaranteeing strength. For example, to suppress the volatilization of volatile oils, it is stable and sufficient to achieve the purpose if the cross-sectional wall thickness of the outer phase part is about 0.1 to 3.0 cm, depending on the thickness of the product. It is preferable because it does not affect the feeling.

The stick-shaped cosmetic of the present invention can be widely used for makeup cosmetics such as foundation, blusher, eye shadow, lipstick, lip balm, eye cream, and any other product that can be applied as a stick product. It is.

[Example] Hereinafter, the present invention will be further explained with reference to Examples.

Note that the present invention is not limited to these in any way.

Example [11 Foundation A: Internal phase part (component) (weight 96) (1
) Titanium oxide 20.0 (2)
Mica titanium 3.0 (3) Talc 14.0 (4) Mica
7.0(5) Colored pigment
6,0 (6) Candelilla Row
1.5 (7) Paraffin wax
1,0(8) Microcrystalline wax 1,
5 (9) Ethylene glycylate distearate 6.0 Cole (10) Polybutene 4,0
(11) Glycerin fatty acid ester 10,5 (1
2) Decamethylcyclopentasiloxane 25.0 Sun (13) Fragrance 0.5B:
External phase part (component) (wt%) (auto
Microcrystalline wax 20.0 (2') Liquid paraffin 80.0 (manufacturing method) Components (1) to (5) are mixed and pulverized to make it homogeneous, and components (8) to (11) are mixed in advance and heated. The dissolved material and components (12) to (13) are added and uniformly dispersed to form an oil-based cosmetic base material. - After mixing with the power component (white ~ (2')), heat and melt to form an oily solid base material. Fill the feeding container with the oily solid base material heated and melted at about 100°C, and then fill it. The container is inverted at about 80° C. to remove excess oily solid base material, form a film, and mold the outer phase.

Next, the container was returned to its original state, and the oil-based cosmetic base material heated and melted at 70° C. was poured into the hollow cylindrical outer phase portion and filled, and then cooled and solidified to form a product. The obtained product had a cross-sectional diameter of 1.5 cm and a cross-sectional thickness of 0.7 mm at the outer phase.

The stick-shaped foundation of the present invention obtained as described above has a beautiful appearance, and when observed after being left at room temperature for 3 months, there was no change such as thinning or shine, and volatilization of volatile oils was effectively suppressed. It has good stability, and in actual use, no bending or cracking was observed, and it spreads well on the skin, forming a uniform and close-fitting cosmetic film. It was extremely useful, had excellent makeup effects, was easy to use, and did not come off easily and had good makeup persistence.

On the other hand, when a stick product is made from only the internal phase part A, volatile components evaporate over time after being left at room temperature for 3 months, resulting in loss of luster, color change, and fine, dense particles on the surface. Appearance changes such as unevenness or cracks were observed, as well as the appearance of gaps with the inner wall of the container due to thinning.Furthermore, the product solidified and did not adhere to the skin, resulting in poor applicability, and the product could not be used as a product. It wasn't something I could get.

Example [21 Foundation A: Internal phase part (ingredients) (wt%) (1)
Titanium oxide 15.0 (2) Spherical titanium oxide 5.0 (3) Mica titanium 10.0 (4) Methyl methacrylate powder 7.0 (5) Silica
2.5(6) Colored pigments
5.5(7) Sucrose fatty acid ester
5.0 (8) Ethylene Glycol Distear 7.0 Rate (9) Candelirawa Nx 1.5
(10) Microcrystalline wax 2.0
(11) Neopentyl glycol dioctoate 6.5
Cole (12) Dimethylpolysiloxane 8.0
(13) Decamethylcyclopentacylo 25.0
Xane B: External phase part (component) (weight%) (white
Polyethylene wax 50.0 (2') Liquid paraffin 50.0 (manufacturing method) A product was prepared according to the same method as in Example [1]. However, the filling temperature of the outer phase is approximately 85°C, and the temperature during removal is approximately 7°C.
The filling temperature of the internal phase was 72°C. The obtained product had a cross-sectional diameter of 1.5 cm and a cross-sectional wall thickness of 1.5 mm at the outer phase.

Example [31 Eyeshadow A: Inner phase part (component) (wt%) (1)
Titanium mica 20.0 (2) Talc 25.0 (3) Colored pigment 10.0 (4) Candelilla wax 2.0 (5) Ethylene glycol distearate 7.0 Cole (8) Microcrystalline wax 5.0 (
7) Liquid paraffin 20.9 (8)
Waseri, n 5.0
(9) Isoparaffin (boiling point 150°C 5.0~
200℃) (10) Fragrance 0.1B=
External phase part (component) (wt%) (auto
Microcrystalline wax 80.0s(2') Dextrin fatty acid ester 0.2(
3') Liquid paraffin 18.8 (Production method) A product was prepared according to the same method as in Example [11]. however,
The filling temperature of the outer phase part is approximately 85℃, and the temperature during removal is approximately Bθ℃
Also, the filling temperature of the internal phase portion was 70°C. The obtained product had a structure with a cross-sectional diameter of 1.0 cm and a cross-sectional wall thickness of 1.0 m+* in the outer phase part.

Example [41 Eyeshadow A: Inner phase part (component) (wt%) (1)
Titanium oxide 8.0 (2) Spherical silica 15.0 (3) Mica titanium
15.0(4) Nylon powder
8.0(5) Colored pigments
2.5(6) Sucrose fatty acid ester 5
．． 0 (7) Ethylene glycol distear 8.0 rate (8) Candelilla wax 2.5 (
9) Microcrystalline wax 3.0 (10)
Neopentyl dioctoate 3.0 Cole (11) Dimethylpolysiloxane 10.0
(12) Tecamethylcyclopentasiloxy 20.0
Sun B: External phase part (component) (wt%) (auto
Microcrystalline wax 50.0 (2') Liquid paraffin 50.0 (manufacturing method) A product was prepared according to the same method as in Example [1]. However, the filling temperature of the outer phase part is approximately 100℃, and the temperature during removal is approximately 9℃.
The filling temperature of the internal phase was 80°C. The obtained product had a cross-sectional diameter of 1.0 C and a cross-sectional thickness of 0.4 layers at the outer phase.

Example [51 Blush A: Internal phase part (component) (wt%) (1)
Mica titanium 10.0 (2) Mica 24.0 (3) Barium sulfate 5.0 (4) Colored pigment
6.0 (5) Carnauba wax
2.0(6) Ceresin wax
2.0 (7) Microcrystalline wax 4.0 (8) Soybean phospholipid 0
．． 5(θ) Squalane 5.0
(10) Liquid paraffin 28.2 (1
1) Octamethylcyclotetracylo 15.0 xane (12) Fragrance 0.3B=
External phase part (component) (weight%) (white
Candelilla wax 60.0 (2') Liquid paraffin 40.0 (manufacturing method) A product was prepared according to the same method as in Example [11]. however,
The filling temperature of the external phase is approximately 65℃, and the temperature during removal is approximately 60℃.
Also, the filling temperature of the internal phase portion was 60°C. The obtained product had a cross-sectional diameter of 1.2 cm and a cross-sectional wall thickness of 0.5 mm at the outer phase.

Example [8] Lipstick A: Internal phase part (component) (wt%) (1)
Microcrystalline wax 19.0 (2) Polybutene 5.0 (3) Rosin acid pentaerythritol 5.0 Stell (4) Glycerin fatty acid ester 40.7 (
5) Vaseline 10.0 (
8) Decamethylcyclopentasiloxane 10.0 San (7) Mica Titanium 8.0 (8)
Colorant 4.0(9) Antioxidant 0.05(lO) Preservative
0.05 (11) Fragrance
0.2B: External phase part (component) (weight%) (auto
Microcrystalline wax 40.0 (2')
Vaseline 60.0 (manufacturing method) A product was prepared according to the same method as in Example [1]. However, the filling temperature of the outer phase is approximately 100'C! The temperature during removal was about 95°C, and the filling temperature of the internal phase was 80°C. The obtained product had a cross-sectional diameter of 1.3 cm and a cross-sectional wall thickness of 1.2 mm at the outer phase.

Example [7] Eye stick A: Internal phase part (component) (wt%) (1)
Microcrystalline wax 10.0 (2) Candelilla wax 5.0 (3) Rosin acid pentaerythritol 7.0 Stell (4) Squalane 1.0 (
5) Diglycerin triisostearate 30.0 rate (8) Glycerin fatty acid ester 31.8 (
7) Vitamin E acetate 0.1 (8)
) Preservative 0.1 (9)
Decamethylcyclopentasiloxane 10.0 San(lO) Diglycerin diisosteare-1,5] (11) 1.3-Butylene gelicol 3
．． 5B: External phase part (component) (weight%) (white
Microcrystalline wax 40.0s (2') Vaseline 60.
0 (Production method) Components (1) to (8) are mixed, heated and dissolved, and components (9) to (11) are mixed and kneaded uniformly. Example [11]
It was made into a product according to the same method as . However, the filling temperature for the outer phase portion was approximately 100°C, the temperature during removal was 85°C, and the filling temperature for the inner phase portion was 80°C. The obtained product has a cross-sectional diameter of 0.9 cm and a cross-sectional wall thickness of 1 cm at the outer phase.
．． It had a structure of 0 mm.

The products of Examples [2] to [7] obtained as above are as follows:
It has good feel and ease of use, such as how it spreads and spreads on the skin, the adhesion of the cosmetic film, and how long the makeup lasts.It also has excellent cosmetic effects, and it maintains the same properties over time as it did immediately after manufacturing. No change in appearance was observed in the surface condition, and the quality was highly stable.

[Effects of the Invention] As described above, the present invention is characterized in that an oil-based cosmetic base material containing a volatile oil agent as an inner phase portion and having a cosmetic function is used as an oil-based cosmetic base material having a composition containing a specific solid oil agent as an outer phase portion. The present invention is based on the fact that it is coated with an oil-based solid base material to form a stick-shaped cosmetic with a stable and protected structure, and its quality is guaranteed.

Since the exposed surface of the stick-shaped cosmetic of the present invention is covered with an external phase film, volatilization of volatile oils over time is effectively suppressed, and there is no change in appearance and feel such as surface gloss when thin. , which has excellent long-term stability.

In addition, by hardening the outer phase part or controlling the thickness to the desired thickness, it is possible to commercialize the product even if the inner phase part is somewhat soft or weak in itself and is difficult to use as a stick product. The bending strength can be further improved, and the constraints on conventional formulations can be relaxed, allowing for a wider range of products.

Furthermore, according to the present invention, by covering the exposed surface with the external phase, stability problems such as sweating and crystal precipitation, which are conventionally encountered in oil-based cosmetics that serve as the internal phase, can be solved at the same time. be.

In the present invention, by having the external phase part composition acid have a specific composition, the external phase film can be stably and easily formed by simply removing the excess after filling the container, and then filling the internal phase part. It can be manufactured by In other words, if the manufacturing method of the present invention is followed, compared to the conventional method, no complicated steps are required, molding is easy, and moreover, it can be directly filled into a container and used as is, which is extremely convenient in terms of work. .

Therefore, when using the stick-shaped cosmetic of the present invention,
Compared to conventional products that mainly contain non-volatile oils, since they essentially contain volatile oils, they are less sticky and oily, have a light feel, and spread easily when applied. After application, as the volatile oil agent evaporates, the adhesion of the solid e-semisolid oil agent or powder increases relatively, and cosmetic effects such as excellent adhesion to the skin and long-lasting cosmetic film can be imparted.

That is, the present invention has made it possible to provide a product of excellent quality, which has significantly improved the aging stability of the conventional type, has good impact resistance, is rich in feel and usability, and is excellent in use.

that's all

Claims (2)

[Claims] (1) A structure in which an internal phase part and an external phase part are integrated, and the internal phase part contains a volatile oil in an amount of 3 to 30% by weight based on the total amount of the internal phase part.
The outer phase contains a solid oil with a melting point of 60°C or higher per the total amount of the outer phase.
A stick-shaped cosmetic comprising an oily solid base material containing in the range of 0 to 80% by weight. (2) Filling a molded container by directly pouring a predetermined amount of an oily solid base material containing a molten solid oil agent with a melting point of 60°C or higher, and then removing the excess oily solid base material to form a hollow cylindrical outer phase. A method for producing a stick-shaped cosmetic, which comprises forming an oil-based cosmetic base material containing a molten volatile oil agent into the hollow cylindrical outer phase portion, filling it, solidifying it, and integrally molding it.