HK1229231B - Cosmetic containing foam as carrier - Google Patents

Description

Cosmetics containing foam as a carrier

Technical Field

The present invention relates to a cosmetic containing a cosmetic composition carrier which is acrylonitrile-butadiene rubber (hereinafter referred to as "NBR").

Background Art

Liquid cosmetic compositions have traditionally been distributed and stored primarily in vacuum containers, pump containers, or glass containers. These containers are often difficult to carry. With the increasing need for simple makeup application or touch-ups while out and about, the demand for portable liquid cosmetic composition carriers is growing.

When it comes to containers that facilitate the transport of liquid cosmetic compositions, sealed containers are often considered. To package a liquid cosmetic composition in a sealed container, considerations must be given to whether the cosmetic composition carrier is compatible with the container, whether the cosmetic composition can be properly filled into the carrier, whether the carrier can uniformly hold the cosmetic composition for an extended period of time, and whether the cosmetic composition can be appropriately released from the carrier when an applicator is ready to remove it. Furthermore, since the container is constantly exposed to the outside and in contact with the applicator during use, materials with high resistance to bacterial contamination are preferred.

Currently, due to the small pore size of NBR, there is little space available to hold the composition. Consequently, the cosmetic composition cannot be ideally filled into it. Even if it is filled, the high expansion rate causes the sponge to deform, hindering release. Furthermore, it lacks antibacterial properties against external bacteria. Therefore, NBR is used as a sponge or other application tool, rather than as a carrier. Polyurethane releases the cosmetic composition subtly, ensuring a light, even application. However, due to its light coverage of the skin, it has received mixed reviews from consumers.

Meanwhile, existing literature suggests that NBR foam can be used as an applicator for pump containers, glass containers, vacuum containers, and the like. However, conventional NBR foam applicators lack the load-bearing and release properties required for a sealed carrier (Japanese Patent No. 3,187,673, Japanese Patent Publication No. 2000-0079016, Korean Patent Publication No. 2013-0116043).

[Prior art literature]

Japanese Patent Publication No. 3,187,673

Japanese Patent Publication No. 2000-0079016

Korean Patent Publication No. 2013-0116043

Summary of the Invention

Technical issues

To solve the above problems, the present invention aims to provide a carrier having excellent filling, carrying, and releasing properties for cosmetic compositions of various viscosities, thereby providing a carrier that is convenient for carrying liquid cosmetic compositions and can contain cosmetic compositions with strong covering power.

Technical Solution

To achieve the above objectives, an embodiment of the present invention provides a cosmetic comprising: a foam carrier and a cosmetic composition carried by the foam carrier, wherein the foam carrier comprises NBR (acrylonitrile butadiene rubber), has pores with an average size of 200 to 900 μm, and has a thickness of 1 to 50 mm, and the viscosity of the cosmetic composition is 2000 to 60,000 cps.

Technical Effects

The foam carrier included in the cosmetics of the present invention has the excellent filling property, load-bearing property and release property that the liquid cosmetic composition carrier should have. Specifically, because the NBR foam constituting the carrier has an optimal pore size and thickness, and has a protrusion structure and a cell-in-cell structure formed in the foam, it is possible to stably fill and carry liquid cosmetic compositions of different viscosity ranges, and only need to gently touch the liquid cosmetic compositions of different viscosity ranges to suitably release them during use. Therefore, the cosmetics of the present invention can be easy to carry the liquid cosmetic composition, thereby being able to provide excellent color development, covering power, moisturizing power, smearing feeling, elasticity, etc. to the skin.

BRIEF DESCRIPTION OF THE DRAWINGS

1 and 2 are images of NBR foam according to one embodiment of the present invention taken using an optical microscope;

FIG3 is a picture showing a side surface of an NBR foam according to an embodiment of the present invention being processed into a film form;

FIG4 is a graph showing the results of a release test conducted on an NBR foam having an average pore size of 150 μm and an NBR foam having an average pore size of 600 μm.

DETAILED DESCRIPTION

Preferred embodiments of the present invention

As used herein, a "carrier" refers to a material capable of supporting any material or ingredient, such as a composition. It may also be referred to as a "carrier," "impregnated material," or "medium." Furthermore, a "carrier" can be a material capable of releasing the material supported therein to a specific applicator for application. For example, the composition supported by the carrier can be transferred to the skin using an application tool (also known as an applicator or applicator), such as the hand, a sponge, a pipette tip, or a brush.

The "carrying capacity" described in this specification refers to the ability to carry and maintain any material or component. The "carrying capacity" required of a carrier is to uniformly carry the composition for a long time, which is different from the temporary application of the material by an applicator.

As used herein, "filling property" or "filling force" refers to the ability of a foam to be filled with a cosmetic composition and can be expressed as the time required to fill a predetermined amount of the cosmetic composition into the foam. The "filling property" or "filling force" described herein is measured by measuring the time required to manually fill a piece of NBR foam measuring 44 mm in diameter x 9.0 mm in height with a cosmetic composition having a viscosity of 2,000 to 6,000 cps.

As used herein, "releasing properties" or "releasing force" refers to the amount of cosmetic composition released when a cosmetic composition is removed from a foam supporting the cosmetic composition using an applicator. It is preferred that an appropriate amount of cosmetic composition be released, neither too much nor too little. "Releasing properties" or "releasing force" as used herein is measured by applying a 2 kg weight (force) to the surface of an NBR foam (44 mm in diameter x 9.0 mm in height) filled with a cosmetic composition having a viscosity of 2,000 to 6,000 cps.

The term "durability" as used herein refers to the degree to which the foam can maintain its state without dissolving, tearing or expanding when the foam is filled with a cosmetic composition and kept at a predetermined temperature for a predetermined time, and/or the degree to which the foam can withstand repeated pressure applied by an applicator when the cosmetic composition is removed from the foam.

In addition, the foam of the present specification has excellent filling properties for filling the cosmetic composition, high carrying capacity for uniformly carrying the cosmetic composition for a long time, high release properties for releasing an appropriate amount of the cosmetic composition when the cosmetic composition is taken out, and can still maintain excellent durability after carrying the cosmetic composition.

The "Asker F hardness" described herein refers to the hardness measured using an ASKER (manufacturer) DUROMETER HARDNESS tester (Type F), and indicates the hardness of the foam before it is loaded with the composition.

The present invention will be described in more detail below.

An embodiment of the present invention provides a cosmetic comprising a foam carrier and a cosmetic composition carried by the foam carrier, wherein the foam carrier comprises acrylonitrile butadiene rubber (NBR), has pores with an average size of 200 to 900 μm, and has a thickness of 1 to 50 mm. The viscosity of the cosmetic composition is 2000 to 60,000 cps.

According to an embodiment of the present invention, the foam carrier may include acrylonitrile butadiene rubber (NBR) in an amount of 80 wt % or more, 85 wt % or more, 90 wt % or more, 93 wt % or more, 95 wt % or more, 97 wt % or more, 98 wt % or more, 99 wt % or more, or 100 wt % relative to the total weight of the foam, but is not limited thereto. Hereinafter, the foam carrier containing NBR is referred to as "NBR foam" or "N BR foam carrier."

In the present specification, the average pore size of the NBR foam carrier may be 200 to 900 μm. Specifically, the average pore size may be 900 μm or less, 800 μm or less, 700 μm or less, 600 μm or less, 500 μm or less, 400 μm or less, 300 μm or less, or 200 μm or more, or 200 μm or more, 300 μm or more, 400 μm or more, 500 μm or more, 600 μm or more, 700 μm or more, 800 μm or more, or 900 μm or more.

Regarding the measurements described in this specification, the average pore size of the NBR foam carrier is shown in FIG. 1 , and can be measured using an optical microscope (Nikon ECLIPSE LV100POL) at a magnification of 5×/0.15.

When the average pore size of the NBR foam of the present invention is less than 200 μm, the pore space available for supporting the cosmetic composition is small, resulting in poor load-bearing capacity. When the average pore size exceeds 900 μm, the pore space is excessively large, potentially reducing the ability to regulate the release of the composition. Therefore, by adjusting the average pore size to the above values, the NBR foam of the present invention exhibits high air permeability, excellent cushioning, softness, flexibility, and elasticity.

According to one embodiment of the present invention, the NBR foam with an average pore size of 200 to 900 μm can have an Asker F hardness of 10 to 95 before loading the cosmetic composition. A foam hardness of less than 10 is too soft, making it difficult to ensure uniform distribution of the loaded contents and resulting in excessive release of the cosmetic composition. A foam hardness exceeding 95 is too hard, making it difficult to fill and release the cosmetic composition. From this perspective, the NBR foam of the present invention can have an Asker F hardness of 95 or less, 90 or less, 80 or less, 70 or less, 60 or less, 50 or less, 40 or less, 30 or less, 20 or less, or 10, and can have an Asker F hardness of 10 or more, 20 or more, 30 or more, 40 or more, 50 or more, 60 or more, 70 or more, 80 or more, 90 or more, or 95. The NBR foam with an average pore size of 200 to 900 μm exhibits excellent cosmetic composition filling, release, and loading properties. More preferably, when the NBR foam has an Asker F hardness of 10-95, it exhibits enhanced load-bearing, filling, and release properties for cosmetic compositions with viscosities of 2,000 to 60,000 cps (centipoise). Although the NBR foam used herein has a relatively large average pore size of 200 to 900 μm, the NBR foam of the present invention, as shown in FIG2 , has a stem structure including protrusions, so even when loaded with low-viscosity compositions, composition sedimentation does not occur.

According to one embodiment, the pores with the protrusions can be 20-80% of the total number of pores contained in the foam carrier. Specifically, the proportion of the number of pores with the protrusions can be more than 20%, more than 30%, more than 40%, more than 50%, more than 60%, more than 70% or 80%, and can be less than 80%, less than 70%, less than 60%, less than 50%, less than 40%, less than 30% or 20%. When the number of protrusions is less than 20% of the total number of pores contained in the foam carrier, sedimentation of the contents will occur and the durability of the foam will decrease. When it is more than 80%, the pores cannot be fully formed, resulting in an excessive release amount. In addition, the size of the protrusions can be 2.5-25% of the average pore size. Regarding the size of the protrusions, the length of the long side of the protrusion can be measured at 5x/0.15 magnification using an optical microscope (Nikon ECLIPSE LV100POL) for evaluation.

Moreover, the NBR foam according to the present invention may have a cell-in-cell structure, and the cell-in-cell structure of the present invention refers to a large-sized hole containing a small-sized hole. This is a small-sized hole formed in the skeleton or frame (or branches) of the hole in addition to the giant hole formed during the foaming process. The present invention manufactures the foam as a carrier into the above-mentioned cell-in-cell structure, so when taking the cosmetic composition, it is possible to ensure that the smearing tool (for example, a sponge puff) can obtain a large area without caking, thereby having the effect of uniformly transferring to the skin without caking. In addition, the cell-in-cell foam can ensure that the composition does not deposit evenly even when carrying a low-viscosity cosmetic composition, and can bring excellent high-concentration makeup effects such as color development, covering power, moisturizing power, smearing feeling, and elasticity.

In this specification, viscosity can be measured by a viscometer, for example, a Brookfield D V-III ULTRA. In the case of a liquid cosmetic composition, the viscosity can be measured using a No. 63 spindle and a rotation speed of 5 rpm.

According to one embodiment of the present invention, the NBR foam carrier can have a thickness of 1mm to 50mm. When the thickness of the foam is less than 1mm, the amount of the cosmetic composition is small. When it exceeds 50mm, it is difficult to release the cosmetic composition when used without residue. The carrier utilizing NBR foam suitable for one embodiment of the present invention can, for example, have a thickness of 3mm to 45mm, for example, can have a thickness of 5mm to 40mm, for example, can have a thickness of 8mm to -35mm, for example, can have a thickness of 10mm to 30mm. Specifically, the thickness can be less than 50mm, less than 40mm, less than 30mm, less than 20mm, less than 10mm, or can be less than 5mm, can be more than 1mm, more than 10mm, more than 20mm, more than 30mm, more than 40mm, or more than 50mm.

Furthermore, according to one embodiment, the NBR foam of the present invention can be adjusted to provide internal spaces capable of supporting the cosmetic composition by adjusting its density. When the density of the NBR foam is ^between 0.05 and 1.25 g/cm³, sufficient internal space capable of supporting the cosmetic composition is ensured, while also exhibiting excellent durability. When the density of the NBR foam is less than 0.05 g/ ^cm³ , the solids content is low, resulting in low tensile strength, elasticity, and hardness, which reduces durability and may lead to tearing. Consequently, the formation of macropores with the aforementioned size of 200 to 900 μm is impossible. Furthermore, since the supporting structure is weakened, the cosmetic composition cannot be retained within the pores, resulting in reduced load-bearing capacity and the possibility of sedimentation. When the density exceeds 1.25 g/ ^cm³ , the solids content is high, and the solids content accounts for a small portion of the total volume, resulting in a low air space, i.e., a low porosity. Consequently, the volume capable of supporting the contents is reduced.

The NBR used in the embodiment of the present invention may have antibacterial properties.

Furthermore, NBR is a material primarily composed of an unsaturated nitrile monomer such as acrylonitrile or methacrylonitrile and a conjugated diene monomer such as butadiene or isoprene. These monomers are mixed with a predetermined amount of a copolymerizable unsaturated monomer, and various additives such as an anionic surfactant, a polymerization initiator, and a molecular weight modifier are added to form a monomer composition, which is then polymerized by a polymerization method such as emulsion polymerization.

According to one embodiment, the mixing ratio of the unsaturated olefin nitrile monomer and the conjugated diene monomer in the NBR can be in the range of approximately 15 to 50 wt%. This mixing ratio can be adjusted depending on the intended use and the cosmetic composition to be impregnated. According to another embodiment, the NBR can be a carboxylated NBR, which is copolymerized with a third component, such as an unsaturated carboxylic acid monomer such as acrylic acid, methacrylic acid, maleic acid, fumaric acid, or methylene succinic acid, to introduce carboxyl groups into the molecule.

According to one embodiment of the present invention, the NBR foam carrier expands as the cosmetic composition occupies space within the carrier. The degree of expansion varies depending on the material, hardness, and additives used. The expansion rate can be calculated using the following mathematical formula:

[Mathematical formula 1]

Height expansion rate (%) = (height of carrier after loading contents - original height of carrier) / original height of carrier × 100

[Mathematical formula 2]

Diameter expansion ratio (%) = (carrier diameter after loading contents - carrier original diameter) / carrier original diameter × 100

According to one embodiment of the present invention, the NBR foam carrier of the present invention can meet at least one of the following expansion rate conditions: a height expansion of 2%-25% after loading the cosmetic composition, and a diameter expansion of 2%-25% after loading the cosmetic composition. If the height expansion rate exceeds 25% or the diameter expansion rate exceeds 25%, the carrier expansion may cause the contents to contaminate the container lid or cause the foam to not fit the container properly. If the height expansion rate is less than 2%, the foam's softness and elasticity may be poor, resulting in reduced filling power. That is, when the expansion rate is between 2 and 25%, the foam expands with the contents and is able to fully absorb moisture from the contents.

And, according to the NBR foam carrier of one embodiment of the present invention, the time that the foam carrier is manually filled with 15g of cosmetic composition, i.e., the filling property, can be 3 to 10 seconds. The amount of the cosmetic composition carried after the foam carrier is filled with the cosmetic composition, i.e., the carrying property, can be 85-99% of the total amount of the cosmetic composition filled in the foam carrier. Alternatively, the amount obtained when the cosmetic composition is dipped (taken) into the smearing tool from the foam carrier, i.e., the release force, can be 0.2 to 0.7g. The release force is the value obtained when the NBR foam surface of the diameter 44mm × height 9.0mm size filled with 2000 to 60,000cps of cosmetic composition is pressurized with a weight (force) of 2 kilograms. When the release force is less than 0.2g, the amount obtained is small, so it is inconvenient to use. When it exceeds 0.7g, the amount obtained exceeds the required amount, so it is not conducive to forming a uniform cosmetic film.

According to one embodiment of the present invention, the cosmetic composition can be a liquid with a range of viscosities, including a solution, emulsion, gel, cream, or suspension. Compared to solid cosmetic compositions, liquid cosmetic compositions are more difficult to carry and store. However, when using the cosmetic composition carrier of the present invention, liquid and cream-like cosmetic compositions can be stably and safely stored and carried.

According to one embodiment of the present invention, a cosmetic composition carrier carries a liquid or creamy cosmetic composition on a carrier, which can reduce transient changes in physical properties caused by thermal shock or physical shock. This is because the carrier serves to trap the contents during use of the cosmetic, thereby enabling the appropriate amount of contents to be taken out.

The cosmetic composition includes a solution, an emulsion or a suspension, but is not limited thereto. In addition, the cosmetic composition carried by the NBR foam according to one aspect of the present invention may include a skin care cosmetic, a pigmented makeup cosmetic, a hair care cosmetic, or an ultraviolet light blocking agent, but is not limited thereto.

The cosmetic composition suitable for use as the cosmetic composition carrier of the present invention may be an emulsified type or a water-dispersed type. The emulsified type may specifically be a water-in-oil (W/O) type or an oil-in-water (O/W) type. The water-dispersed type may specifically be an oil-dispersed type or a water-dispersed type.

Furthermore, the cosmetic composition carrier of the present invention may have a film (closed-cell state) formed on at least one of the carrier's bottom surface (the side opposite the surface that contacts the hand or applicator) or side surface, as shown in FIG3 . The film can prevent the cosmetic composition from leaking from the bottom or side surfaces while supported on the carrier. As described above, when the side or bottom surface of the carrier is in the form of a film, the cosmetic composition can be reduced from migrating toward the side or bottom surface and flowing outside the carrier, thereby reducing the loss of the cosmetic composition, thereby extending the service life and improving convenience.

According to one embodiment of the present invention, the cosmetic composition can be formulated into a dual-purpose powder, makeup primer, makeup base, liquid or high-viscosity foundation, concealer, lipstick, lip balm, foundation, lip liner, eyebrow pencil, eyeliner, eye shadow, blush, UV blocker, lotion, cream or perfume, etc., but is not limited thereto.

In addition, the cosmetic according to the embodiment of the present invention may further include, for example, an applicator for taking the cosmetic composition from the foam carrier that carries the cosmetic composition.

In addition, the cosmetic may further include a lower portion capable of accommodating the cosmetic composition carrier and a mirror, and may also include an upper container including a lid, generally known as a compact cosmetic container, but is not limited thereto.

Implementation of the Invention

The present invention will be described in more detail below by way of examples. These examples are merely for the purpose of illustrating the present invention, and the present invention is not limited to these examples, as will be apparent to those skilled in the art.

[Example]

NBR is the main raw material, with pigments, vulcanizers, and optionally foaming agents and other additives added. The mixture is then mixed with water in a predetermined ratio and stirred to create foam. The mixture is then poured into a mold and solidified, where it is heated in a furnace for a vulcanization reaction and molding. The final product is then cut, dried, and surface treated to produce NBR foam.

The NBR foam thus obtained had an ASKER hardness of 48 and an average pore size of 680 μm.

[Test Example 1]

1-1: Load-bearing capacity, release force, and filling force results corresponding to NBR foam density

This test example measured the load-bearing capacity, filling capacity, and release capacity corresponding to the density of NBR foam.

The cosmetic composition shown in Table 1 below, having a viscosity of 15,000 cps (measured using a Brookfield DV-III ULTRA, No. 63 spindle, spindle speed 5 rpm), was loaded onto NBR foam having an Asker F hardness of 5 to 95 prior to loading the cosmetic composition. The loading force, release force, and filling force were then measured.

Filling properties were measured by manually filling 15g of the cosmetic composition into NBR foam (the carrier was placed in a container and filled with a spatula). Load-carrying properties were measured by placing 15g of the cosmetic composition into NBR foam and then leaving it at 55°C for four weeks. The amount of cosmetic composition held by the carrier in the container was then measured. Release force was measured by hand and by sponge removal of the contents from each foam. The results are shown in Table 2.

Table 1

[Table 1]

Composition of cosmetic composition carried by foam

Table 2

[Table 2]

Load-bearing capacity, release force and filling force corresponding to the density of NBR foam

1-2: Analysis of load-bearing capacity, filling force, and release force corresponding to the hardness of NBR foam

This example measures the load-bearing capacity, filling capacity, and release capacity corresponding to the hardness of NBR foam.

Table 3

The results are shown in Table 3, indicating that NBR foams with an Asker F hardness of 20-80 before loading have very good filling power and a very suitable release force compared to NBR foams with an Asker F hardness of 5 or 100. In terms of discharge force, it is preferred that the release force is neither too large nor too small, so the appropriate amount is determined to be about 0.3 to 0.5 g per release. When the release force is less than 0.3 g, the amount of application is small, resulting in a poor cosmetic effect. When the release force is greater than 0.5 g, caking occurs, and the uniform application effect is poor. This shows that although there is no significant difference in load-bearing capacity, NBR foams with an Asker F hardness of 20 to 95 have better load-bearing capacity.

1-3: Analysis of the load-bearing capacity, release force, and filling force corresponding to the pore size of NBR foam

Using the cosmetic compositions listed in Table 1 and NBR foams with an average pore size of 200 to 900 μm, the same method as in 1-1 above was used to measure the load-bearing capacity, release force, and filling capacity corresponding to each average pore size. The results are shown in Table 4 below.

Table 4

[Table 4]

Load-bearing capacity, release force, and discharge force corresponding to the average pore size of NBR foam

Average foam pore size (μm) 200 300 400 500 600 700 800 900 1000 Bearing capacity (g) 14.5 14.7 14.7 14.7 14.7 14.5 14.0 13.7 12.3 Release force (g) 0.22 0.32 0.37 0.4 0.43 0.45 0.47 0.55 0.75 Filling force (seconds) 10 5 5 5 4 4 4 3 3

The results, shown in Table 4, indicate that NBR foam with an average pore size of 200 to 900 μm exhibits both adequate release and excellent filling properties. In terms of load-bearing capacity, NBR foam with an average pore size of 200 to 600 μm exhibits the best performance.

1-4: Analysis of the load-bearing capacity and release force corresponding to the viscosity of the cosmetic composition

NBR foam with an average pore size of 680 μm and an Asker F hardness of 50 before loading was prepared. This foam was then filled with the prepared cosmetic compositions with viscosities ranging from 1,500 to 51,000 cps, as shown in Table 5. The loading and release forces were measured using the same method as in step 1. The results, shown in Table 6, demonstrate excellent loading force when using cosmetic compositions with viscosities ranging from 2,000 to 60,000 cps, while the release force was found to be adequate within the aforementioned range.

Table 5

[Table 5]

Composition of cosmetic compositions with different viscosities

Table 6

[Table 6]

Filling force, carrying capacity and release force corresponding to the viscosity of the cosmetic composition

Viscosity (cps) 1500 2000 10000 30,000 50000 60000 63000 Bearing capacity (g) 14 14.8 14.7 14.5 13.7 13.0 12.5 Release force (g) 0.26 0.40 0.42 0.42 0.44 0.44 0.45

1-5: Antibacterial properties of NBR foam

Regarding antibacterial activity, the reduction rate was measured after inoculation of Staphylococcus aureus and Pneumococcus pneumoniae. The antibacterial activity test method used was KSK0693, using Staphylococcus aureus ATCC 6538 and Klebsiella pneumoniae ATCC 4352. The results are shown in Table 7 below.

Table 7

[Table 7]

Antibacterial properties of NBR foam

NBR foam Staphylococcus cell reduction rate 99% Cytostatic reduction rate of pneumonia 99%

1-6: Comparison of load-bearing capacity, color development, moisturizing and hiding power between NBR foam and polyurethane

NBR foam having an average pore size of 600 μm, an Asker F hardness of 50, and dimensions of 44 mm diameter x 9.0 mm height was used. As a control group, polyurethane (95 ppi) having dimensions of 44 mm diameter x 9.0 mm height was used as a carrier for the cosmetic composition.

The results are shown in Table 8. When carrying a low-viscosity (2000 cps) cosmetic composition, the NBR foam carrier exhibited a higher carrying capacity than the polyurethane carrier. Furthermore, the color development was also higher when using the NBR foam.

As shown in Table 9, when carrying a high-viscosity cosmetic composition, the filling force when using NBR foam as a carrier (5 seconds) is significantly higher than that when using a polyurethane carrier (20 seconds). In terms of moisturizing feel and covering power, the use of NBR foam is also higher.

Table 8

[Table 8]

Comparison of the Carrier Capacity and Color Development of Low-Viscosity Cosmetics

*Color rendering: 1, 3, 5, 7, 9. The higher the score, the better the color rendering.

Table 9

[Table 9]

Comparison of the filling power, moisturizing feel, and covering power of carriers based on high-viscosity cosmetics

**Moisturizing feeling: 1, 3, 5, 7, 9, the higher the score, the better the moisturizing feeling

***Hiding power: 1, 3, 5, 7, 9, the higher the score, the better the hiding power

[Test Example 2] Comparison of NBR foams based on pore size

2-1: Determination of the filling properties of the cosmetic composition

The cosmetic compositions listed in Tables 10 and 11 below were supported on NBR foam having an average pore size of 150 μm, a hardness of 50 Asker F before supporting the cosmetic composition, and dimensions of 44 mm in diameter × 9.0 mm in height, and on NBR foam having an average pore size of 600 μm, a hardness of 50 Asker F before supporting, and dimensions of 44 mm in diameter × 9.0 mm in height.

Table 10

[Table 10]

Table 11

[Table 11]

Liquid eyeliner ingredients

Element Sample 5 (content wt%) pure water margin Hydroxyethyl cellulose 1.0 triethanolamine 4.0 Black Iron Oxide 1.0 carbon black 3.0 Ceteareth-25 0.5 Steareth-20 0.5 beeswax 6.0 Palm wax 4.0 paraffin 4.0 stearic acid 7.5 Glyceryl Monostearate 1.0 Polysorbate 2.0 Acrylate copolymer emulsion 23.0

The viscosities of the samples in Tables 10 and 11 above are shown in Table 12 below.

Table 12

[Table 12]

The cosmetic compositions of Samples 1 to 5 were loaded onto the NBR foam having an average pore size of 150 μm and the NBR foam having an average pore size of 600 μm, respectively, and their filling capacity for an appropriate amount of content within a predetermined time was measured. The results are shown in Table 13.

Table 13

[Table 13]

Filling force (seconds) Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Viscosity Pressed powder dosage form 45,000cps 23,000cps 4,000cps 4,000cps Comparative Example >30 seconds >30 seconds 20 seconds 3 3 Example 7 5 4 3 3

2-2: Determination of the long-term load-bearing capacity of the cosmetic composition

15g of the cosmetic compositions of Samples 1 to 5 were loaded onto the aforementioned NBR foams with an average pore size of 150μm and 600μm, respectively, and left at 55°C for four weeks. The amount of cosmetic material carried by the carrier within the container was then measured. The results, shown in Table 14, demonstrate that the NBR foams of the comparative examples and examples possess high load-bearing capacity.

Table 14

[Table 14]

Bearing capacity (g) Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Viscosity Pressed powder dosage form 45,000cps 23,000cps 4,000cps 4,000cps Comparative Example 14.2 14.3 14.3 14.0 14.0 Example 14.6 14.7 14.6 14.5 14.5

2-3: Determination of the release properties of the cosmetic composition

Release properties were tested on NBR foams with an average pore size of 150 μm and 600 μm. The amount of cosmetic material removed from the carrier by a sponge was measured. The results, shown in Figure 4, demonstrate that the 600 μm NBR foam exhibits superior release properties.

2-4: Determination of color development and hiding power of cosmetic compositions

The same foundation (Sample 2) and eyeliner (Sample 5) were loaded onto the NBR foam having an average pore size of 150 μm and the NBR foam having an average pore size of 600 μm, and the color development was compared.

When using NBR foam with an average pore size of 150μm, the foundation appears thin and cloudy, while when using NBR foam with an average pore size of 600μm, it exhibits excellent color development, covering power, moisturizing power, spreadability, elasticity, etc.

In the case of the liquid eyeliner, the NBR foam having an average pore size of 150 μm exhibited a thin and cloudy effect, whereas the NBR foam having an average pore size of 600 μm exhibited a deep and clear effect (Table 15).

Table 15

[Table 15]

[Test Example 3]

Evaluating NBR foam properties

NBR is the main raw material, along with pigments, vulcanizing agents, and optionally foaming agents and other additives. The mixture is then mixed with water in a predetermined proportion and stirred to create foam. The mixture is then poured into a mold, solidified, and heated in a furnace for a vulcanization reaction and molding. The final product is then cut, dried, and surface treated to produce NBR foam.

The prepared NBR foam had an ASKER hardness of 47 and an average pore size of 680 μm.

Then, the load-bearing capacity, filling capacity, and release capacity of the NBR foam were measured.

A cosmetic composition having a viscosity of 12,800 cps was prepared to have the same composition as in Table 1 and loaded onto NBR foam. As a result, the diameter of the NBR foam expanded by 12.90% and the height expanded by 13.20%.

Regarding filling properties, the time required to fill 15g of the cosmetic composition was measured. NBR's characteristic is that it initially fills imperfectly, but it automatically expands and absorbs as it fills. Therefore, after the cosmetic composition and carrier are placed in the container, the filling remains stable without overflowing.

Regarding carrying capacity, the amount of cosmetic material carried by the carrier within the container was measured after filling it with 15g of the cosmetic composition and leaving it at 55°C for four weeks. Regarding release force, the amount of content removed by sponging and hand was measured. The results are shown in Table 16 below.

Table 16

[Table 16]

Viscosity of cosmetic composition 12800cps Hardness of the carrier 47 Average pore size of the support 680μm Filling force (seconds) 9 Bearing capacity (g) 13.5 Release force (g) 0.22 Diameter expansion rate 12.90% Height expansion rate 13.20%

[Preparation Example 1] Liquid Eyeliner

The viscosity of the eyeliner obtained under the measurement conditions of spindle #63 and spindle speed of 5 rpm is in the range of 2000-30000 cps.

Table 17

[Table 17]

Element Preparation Example 1 (content wt%) pure water margin Hydroxyethyl cellulose 1.0 triethanolamine 4.0 Black Iron Oxide 1.0 carbon black 3.0 Ceteareth-25 0.5 Steareth-20 0.5 beeswax 6.0 Palm wax 4.0 paraffin 4.0 stearic acid 7.5 Glyceryl Monostearate 1.0 Polysorbate 2.0 Acrylate copolymer emulsion 23.0

[Preparation Example 2] Lip Cosmetics

The viscosity of the lip makeup obtained under the measurement conditions of spindle #63 and a spindle speed of 5 rpm is in the range of 5,000-60,000 cps.

Table 18

[Table 18]

[Preparation Example 3] Skin Care Products

The viscosity of the skin care composition obtained under the measurement conditions of spindle #63 and spindle speed of 5 rpm is in the range of 3,000-50,000 cps.

Table 19

[Table 19]

Element Preparation Example 3 (content wt%) pure water to 100 glycerin 8.0 Butanediol 4.0 Liquid paraffin 15.0 β-glucan 7.0 Carbomer 0.1 Hexamidine and retinol 1.0 Caprylic/Capric Triglyceride 3.0 Squalene 1.0 Cetearyl Glucoside 1.5 Sorbitan Isostearate 0.4 Cetearyl Alcohol 1.0 preservative appropriate amount fragrances appropriate amount pigment appropriate amount beeswax 3.0

The above specifically describes specific parts of the present invention, and these specific descriptions are only preferred embodiments, and the scope of the present invention is not limited by them. It is obvious to those skilled in the art. Therefore, the essential scope of the present invention is defined by the technical solutions.

Claims (10)

1. A cosmetic product, comprising: Foam carrier; and Cosmetic composition, which is carried on the foam carrier, The foam carrier comprises acrylonitrile butadiene rubber, comprising pores with an average pore size of 200–900 μm and a thickness of 1–50 mm. The viscosity of the cosmetic composition is 2000-60,000 cps; The pore skeleton of the foam carrier has protrusions; The foam carrier described herein has a pore-within-a-pore structure. The number of pores with the protrusions is 20-80% of the total number of pores in the foam carrier. The foam carrier is used to release the cosmetic composition contained therein into a separate application tool, and The foam carrier described herein has one or more of the following characteristics: i) The expansion rate after carrying the cosmetic composition is 2-25%; and ii) The diameter expansion rate after carrying the cosmetic composition is 2-25%. The height expansion rate and diameter expansion rate are calculated according to the following mathematical formulas 1 and 2: [Mathematical Expression 1] Height expansion rate (%) = (Height of the carrier after loading the contents - Original height of the carrier) / Original height of the carrier × 100 [Mathematical Expression 2] Diameter expansion rate (%) = (diameter of the carrier after loading the contents - original diameter of the carrier) / original diameter of the carrier × 100. 2. The cosmetic product according to claim 1, wherein, The hardness of the foam carrier before it carries the cosmetic composition is 10-95 Asker F. 3. The cosmetic product according to claim 1, wherein, The size of the protrusion is 2.5 to 25% of the average pore size. 4. The cosmetic product according to claim 1, wherein, The hardness of the foam carrier before it carries the cosmetic composition is Asker F hardness 10-100. 5. The cosmetic according to claim 1, wherein the foam carrier has one or more of the following characteristics: i) The filling time is 3 to 10 seconds, where the filling time is the time it takes for 15g of the cosmetic composition to be manually filled into the foam carrier; ii) The load-bearing capacity is 85-99%, whereby the load-bearing capacity is the ratio of the amount of cosmetic composition carried by the foam carrier after it carries the cosmetic composition to the total weight of the cosmetic composition filled into the foam carrier; and iii) The release power is 0.2 to 0.7 g, where the release power is a measured value representing the amount of cosmetic composition obtained from the foam carrier. 6. The cosmetic product according to claim 1, wherein, The cosmetic composition carried by the foam carrier is selected from the group consisting of solutions, emulsions, gels, creams, and suspending agents. 7. The cosmetic product according to claim 1, wherein, The cosmetic composition carried by the foam carrier is selected from the group consisting of skin care cosmetics, pigment-containing color cosmetics, hair care cosmetics, and ultraviolet blocking agents. 8. The cosmetic product according to claim 1, wherein, One or more of the surfaces of the foam carrier other than the surface that comes into contact with the hand or application tool are in the form of a film. 9. The cosmetic according to claim 8, wherein, The one or more surfaces are either side surfaces or bottom surfaces. 10. The cosmetic product according to claim 1, further comprising: An application tool that obtains the cosmetic composition from a carrier holding the cosmetic composition.