KR101630841B1 - Cosmetics comprising a porous foam and a cosmetic composition impregnated therein - Google Patents

Abstract

The present invention can prevent the liquid cosmetic composition from sinking to the lower part of the foam even after long-term use, and exhibits excellent durability without the problem of expansion or melting of the outer shape due to interaction with the impregnated liquid cosmetic composition, To a cosmetic comprising the porous foam and the cosmetic composition impregnated therewith.

Description

TECHNICAL FIELD The present invention relates to a cosmetic composition comprising a porous foam and a cosmetic composition impregnated with the same,

The present invention relates to a cosmetic composition comprising a porous foam and a cosmetic composition impregnated therewith. More particularly, the present invention relates to a porous foam which can be stably kept in a foam without sedimentation, To a cosmetic product.

In general, a liquid emulsion cosmetic having a low viscosity is preferred because it has excellent spreadability and spreadability, and is excellent in feeling of use. However, it is inconvenient to carry and has a problem in stability such as separation during storage. To solve these problems, cosmetic products in which a low viscosity emulsion type liquid cosmetic composition is impregnated with a polyurethane foam have been developed and used.

The polyurethane foam has an advantage of being excellent in the stability of the polyurethane and advantageous in impregnating a large amount of cosmetic material in the polyurethane foam. However, since the pores thereof are too large, the cosmetic material can not be maintained uniformly throughout the pores, When constant pressure is constantly applied to the foam due to continuous use, the impregnated cosmetic settles to the lower part of the foam, which has a problem in storage stability. Therefore, it is difficult to use the cosmetics impregnated to the end while maintaining the original shape, and there is a problem that it is inconvenient that the cosmetics are used to some extent in order to use the cosmetics settled downward and then the consumers themselves have to turn the impregnation sponge over again. Therefore, there is a demand for a porous foam which can keep the cosmetic evenly even by continuous use.

Further, problems such as a phenomenon that a foam is swollen or melted and torn by reaction with a silicone oil, which is a component contained in cosmetics, or a substance having a high polarity such as ethylhexylmethoxycinnamate or hexylhexylsalicylate is also a problem to be solved .

In order to solve the above problems, the inventors of the present invention have made extensive studies on the material, physical properties, reactivity with the cosmetic material, and the like of the foam material that can be used, and have completed the present invention.

Korean Patent Publication No. 10-2012-0065982 (June 21, 2012) Korean Patent Laid-Open No. 10-2012-0108509 (2012.10.05) Korean Patent Publication No. 10-2012-0139465 (2012.12.27) Korean Patent Laid-Open No. 10-2013-0116043 (Oct. 22, 2013)

An object of the present invention is to provide a cosmetic composition which can prevent sedimentation of a liquid cosmetic composition to the lower part of a foam even after long-term use, exhibits excellent durability without the problem of swelling or melting and tearing by interacting with the impregnated liquid cosmetic composition, Which can be discharged in a uniform and appropriate amount, and which is excellent in convenience of use, and a cosmetic comprising the cosmetic composition impregnated with the porous foam.

In order to achieve the above object, the present invention relates to a rubber composition comprising acrylonitrile butadiene rubber (NBR), styrene-butadiene rubber (SBR), natural rubber (NR), polyvinyl chloride, polyethylene, ethylene- ), Latex, silicone rubber, styrene-isoprene-styrene copolymer (SIS), styrene-ethylene-butylene-styrene copolymer (SEBS), polyvinyl alcohol (PVA), butyl rubber, chloroprene rubber and polyurethane The present invention provides a cosmetic comprising a porous foam and a cosmetic composition impregnated therewith, which is a foam of two or more polymer blends selected from the group consisting of

The term "foam" used in the present invention refers to a foam having foamed rubber, vinyl, polyurethane or the like and solidifying it and having a sponge shape in general.

As used herein, the term "blend" may refer to a mixture of different polymeric materials. Preferably, in the present invention, as a method for modifying physical properties of a polymer, a blend is a polymer mixture in which physical properties are modified by a method of physically mixing different polymers, that is, by blending, instead of copolymerization taking a chemical bonding system. can do. In a preferred embodiment of the present invention, the polymer blend comprises at least one polymer selected from the group consisting of acrylonitrile butadiene rubber (NBR), styrene-butadiene rubber (SBR), natural rubber (NR), polyvinyl chloride, polyethylene, ethylene-vinyl acetate rubber (EVA) Silicone rubber, styrene-isoprene-styrene copolymer (SIS), styrene-ethylene-butylene-styrene copolymer (SEBS), polyvinyl alcohol (PVA), butyl rubber, chloroprene rubber, and polyurethane ≪ / RTI > More preferably, it may mean a blend between acrylonitrile butadiene rubber (NBR) and styrene-butadiene rubber (SBR).

The term "acrylonitrile butadiene rubber (NBR)" used in the present invention is a synthetic rubber which is a copolymer of acrylonitrile (AN) and butadiene rubber produced by emulsion polymerization, also known as nitrile rubber.

The term " styrene butadiene rubber (SBR) " used in the present invention refers to a synthetic rubber produced by copolymerizing styrene and butadiene.

The term " NR (Natural Rubber) " used in the present invention refers to an elastomer whose main component is an isoprene polymer, obtained from a latex which is a solution of parabolic rubber (Hevea brasiliensis), and is classified as a solid rubber or a latex as a liquid rubber.

The terms " polyvinyl chloride (PVC) " and " polyethylene (PE) " used in the present invention refer to a kind of thermoplastic plastics.

The term " ethylene-vinyl acetate rubber (EVA) " as used in the present invention refers to a copolymer of ethylene and vinyl acetate in which the main chain is completely saturated.

The term " latex " as used herein refers to natural rubber latex or synthetic rubber latex.

The term " silicone rubber " used in the present invention is a rubber made of silicone. When dimethylsilanediol is condensed, a silicone rubber having SiOSi bonds is produced.

The term "styrene-isoprene-styrene copolymer (SIS)" and styrene-ethylene-butylene-styrene copolymer (SEBS) used in the present invention refer to styrene-based thermoplastic elastomers having both rubber and resin characteristics.

The term " polyvinyl alcohol (PVA) " used in the present invention refers to a semi-crystalline synthetic polymer prepared by hydrolyzing a polyvinyl acetate polymer as a water-soluble polymer.

As used herein, the term " butyl rubber " refers to a synthetic rubber that is a copolymer of isobutylene and isoprene.

The term " chloroprene rubber " used in the present invention refers to a synthetic rubber produced by polymerizing chloroprene.

The term " polyurethane " used in the present invention refers to a polymer having a urethane bond in its molecular structure, and is mainly composed of a diisocyanate and a polyhydroxy compound (polyol having two or more -OH groups at the terminal of the molecule) It is made by reaction.

The porous foam according to the present invention comprises at least one of the following materials: acrylonitrile butadiene rubber (NBR), styrene-butadiene rubber (SBR), natural rubber (NR), polyvinyl chloride, polyethylene, ethylene-vinyl acetate rubber (EVA) , At least two polymers selected from the group consisting of styrene-isoprene-styrene copolymer (SIS), styrene-ethylene-butylene-styrene copolymer (SEBS), polyvinyl alcohol (PVA), butyl rubber, chloroprene rubber, and polyurethane Can be prepared by foaming the blend.

The term " foaming " used in the present invention refers to the production of a foam having a cell formed by blending a foaming agent into a plastic or rubber structure and generating gas under a predetermined temperature, pressure and time. In the present invention, two or more polymer components may be blended together with a crosslinking agent, a crosslinking accelerator, a foaming agent, a foam stabilizer, etc., followed by foaming and curing to obtain a foam. The pore size and pore distribution of the porous foam can be controlled by controlling the foaming process.

As the crosslinking agent that can be used in the present invention, sulfur compounds such as colloidal sulfur, fine powder sulfur, sulfuric dichloride, and dipentamethylenethiuram tetrasulfide can be used, but the present invention is not limited thereto. The amount of the crosslinking agent to be used may be about 0.02 to 20 parts by weight, preferably 0.1 to 10 parts by weight based on 100 parts by weight of the polymer blend.

Examples of the crosslinking accelerator that can be used in the present invention include inorganic crosslinking accelerators such as zinc oxide, active zinc oxide, surface-treated zinc oxide, zinc carbonate, and potassium hydroxide; Dithiocarbamate zinc such as dimethyldithiocarbamate zinc, diethyldithiocarbamate zinc, and di-n-butyldithiocarbamate zinc; Tetramethyl thiuram disulfide, tetraethyl thiuram disulfide, tetrabutyl thiuram disulfide, N, N'-dimethyl-N, N'-diphenyl thiuram disulfide, dipentamethyl thiuram tetrasulfide N-diisopropyl-2-benzothiazylsulfenamide, Nt-butyl-2-benzothiazylsulfenamide, N-cyclohexyl-2-benzothiazylsulfenamide, N, N - dicyclohexyl-2-benzothiazylsulfenamide, sulfenamides such as N-oxydiethylene-2-benzothiazylsulfenamide; And mixtures of two or more thereof may be used, but are not limited thereto. The amount of the crosslinking accelerator to be used may be about 0.02 to 20 parts by weight, preferably 0.1 to 10 parts by weight based on 100 parts by weight of the polymer blend.

The " foaming agent " which can be used in the present invention includes azo-based compounds such as azodicarbonamide (ADCA) and barium azodicarboxylate; Nitroso compounds such as dinitrosopentamethylenetetramine, N, N-dinitroso-N, N-dimethyl terephthalate; Hydrazine compounds such as hydrazine hydrate; Inorganic foaming agents such as sodium hydrogencarbonate; Inorganic compounds such as nitrogen, carbon dioxide and water; Hydrocarbons such as methane, ethane, propane, butane and pentane; Freon compounds such as chlorofluorocarbons (CFC); Various alcohols such as ethanol and methanol; Sodium lauryl sulfate, sodium laurate, sodium myristate, sodium stearate, ammonium stearate, sodium oleate, potassium oleate, sodium polyoxyethylene lauryl ether sulfate, sodium dodecylbenzenesulfonate, stearyldimethylammonium chloride, A surfactant, and the like, but the present invention is not limited thereto. The amount of the blowing agent to be used may be about 0.1 to 10 parts by weight, preferably 0.2 to 6.0 parts by weight based on 100 parts by weight of the polymer blend.

The "foam stabilizer" that can be used in the present invention is a substance which stabilizes foamed bubbles and is a reaction product of ethyl chloride, formaldehyde and ammonia; Alkyl quaternary ammonium chlorides; And alkylaryl sulfonates, and the like, but are not limited thereto. Reaction products of ethyl chloride, formaldehyde and ammonia are preferred. The amount of the foam stabilizer to be used may be generally about 0.1 to 10 parts by weight, preferably 0.2 to 6.0 parts by weight based on 100 parts by weight of the polymer blend.

In the present invention, a curing agent, an oxidizing agent, an antioxidant, a filler, etc., which can be usually mixed in foaming, may be further mixed in the production of the porous foam.

In the present invention, the foam molding of the polymer can be carried out by appropriately adjusting the amounts and kinds of the crosslinking agent, crosslinking accelerator, foaming agent, foam stabilizer and other additives used, the amount of air injected for foaming during production, and the foaming temperature. Are obvious to those skilled in the art.

Preferably, the porous foam may be prepared by foaming a blend of acrylonitrile butadiene rubber (NBR) and styrene-butadiene rubber (SBR). Porous foams made from polymer blends containing such NBR and SBR may have better content retention because of the greater hydrophobicity of the polymer compared to conventional polyurethane porous foams. This is because the hydrophobic polymer does not diffuse the liquid component of the cosmetic after the liquid cosmetic material is filled in the foam, and does not escape through the pores to the outside of the porous foam.

In the porous foam according to the present invention, the weight ratio of NBR and SBR may be 99: 1 to 70:30, preferably 99: 1 to 80:20. When the content of SBR exceeds 30% by weight and the content of NBR is low in the content ratio of NBR and SBR, the hardness of the porous foam becomes high and becomes hard, while the durability can be lowered. And the porous foam may expand and inflate after the cosmetic composition is impregnated. On the other hand, when the content of SBR is less than 1 wt% and the content of NBR is increased, the hardness of the porous foam is lowered and becomes too soft, and the porous foam may expand and inflate after the impregnation of the cosmetic composition.

The porous foam may have a hardness of 30 to 80 on the basis of ASKER hardness type F (Type F) before impregnating the cosmetic composition. More preferably, it may have a hardness of 40 to 70, more preferably 45 to 60. [ If the hardness of the porous foam is less than 30 and the hardness of the porous foam is excessively soft, the liquid cosmetic having a low viscosity due to the excessively pressurized property when the porous foam is pressurized may cause excessive discharge and lower the repulsive elastic force of the porous foam, . When the hardness exceeds 80, a force required to pressurize the porous foam and discharge the cosmetic becomes large, so that it is difficult to easily discharge the cosmetic from the porous foam.

The porous foam according to the present invention may have a cell size such that the impregnated cosmetic material does not sink to the bottom, the cell size may be 50 to 2,000 mu m, preferably 50 to 1000 mu m, more preferably 80 Mu] m to 1,000 [mu] m, more preferably 80 [mu] m to 500 [mu] m. "Cell size" may be a value measured with an optical microscope (NIKON ECLIPSE 80i). The size of the cell is related to the size of the micropores possessed by the porous foam to impregnate the cosmetic. Therefore, if the size of the cell is too small to less than 50 탆, it may be difficult to impregnate the cosmetic into the porous foam and to discharge the cosmetic from the porous foam. On the other hand, if the size of the cell is excessively larger than 2,000 mu m, impregnation of the cosmetic into the porous foam is easy, but when the porous foam is pressurized, an excessive amount of the cosmetic may be discharged or the cosmetic impregnated into the porous foam may sink have.

It is preferred that the porous foam according to the invention has a pore size such that the impregnated liquid does not settle, for example the number of cells per inch may be from 20 to 120 ppi, preferably from 50 to 100 ppi , And more preferably the number of cells per inch may be 70 to 90 ppi. The number of cells per inch can be measured by measuring an image magnified 100 times using an image analyzer and then measuring the average cell size and converting the number of cells entering the reference length (1 inch, about 2.54 cm) . It is difficult to control the flowability of the low-viscosity cosmetic composition and it may be difficult to impregnate a proper amount of the low-viscosity cosmetic composition. When the foam having a pore number per inch larger than 120 ppi has a low viscosity The cosmetic composition can not be effectively supported, so that the cosmetic composition can be precipitated or separated, and it is difficult to control the release of the composition.

The porous foam according to the present invention may have an open cell structure. When the foam has a closed cell structure, it is preferable that the foam has an open cell structure because the foam composition may not be impregnated easily because the foam is trapped in the foam. In the present invention, the term "open cell" refers to a network structure, and "closed cell " means a cell structure having a foam-like foam.

Preferably, the porous foam has a hardness of 30 to 80 on the basis of an ASKER hardener type F (Type F), the cell size is 50 to 2,000 mu m, and the number of cells per inch is 30 to 120 ppi .

The density of the porous foam according to the present invention may be 0.02 to 0.3 g / cm < ³ >. Preferably 0.05 to 0.3 g / cm < ³ >, and more preferably 0.05 to 0.1 g / cm < ³ >. These densities are measured with a diameter of 40 mm and a thickness of 9 T under the assumption that the volume is the same, and then the density is calculated. The density of the porous foam is related not only to the internal space that can impregnate the cosmetic, but also to the magnitude of the pressure required for dispensing the cosmetic. Specifically, when the density of the porous foam is higher than 0.3 g / cm < ³ >, there is not enough internal space to impregnate the cosmetic, so that it is difficult to effectively impregnate the cosmetic and the pressure to be applied for discharging the cosmetic becomes high. May be undesirable. On the other hand, when the density of the porous foam is as low as less than 0.02 g / cm < ³ >, the discharge amount of the cosmetic material may be excessive when the porous foam is pressed.

The porous foam according to the present invention may have chemical resistance to ester oil, volatile silicone oil, water, and polar organic sunscreen agents. The porous foam must have high stability in relation to the cosmetic material to be impregnated, thereby preventing the deterioration of the cosmetic material and not causing deterioration or deformation of the porous foam.

The porous foam according to the present invention may comprise a foamed or flocked foam. In the present invention, a " film-coated foam " is a polymeric foam such as rubber, polyvinyl or polyurethane coated with a film, which is generally smaller in size than the foam before the film is formed. In the present invention, a " floc processed foam " is a fiber foamed to a polymer foam. The fibers may be at least one member selected from the group consisting of cotton, acrylic, polyamide, nylon, polyester, silk, and rayon, and specifically cotton, acryl, polyamide, nylon, polyester, silk, cotton and acrylic, Rayon, nylon and polyester and cotton, acrylic and polyester.

The porous foam according to the present invention can be applied to an airless, tube, stick, and stamped container structure, and has a property of being easily squeezed by a certain pressure or shearing and discharging well.

According to the present invention, the cosmetic may comprise a porous foam and a cosmetic composition impregnated in the porous foam. Such cosmetics may be, but are not limited to, makeup primers, makeup bases, foundations, powders, twin cakes, eye shadows, cheek powders, blushers, concealers, facts, sunscreens, liquid formulations thereof or airless formulations.

According to the present invention, the viscosity of the cosmetic composition used may be from 2,000 cps to 20,000 cps. When the viscosity is more than 20,000 cps, it is difficult to impregnate and discharge the cosmetic material in the porous foam, and when the cosmetic is applied to the skin, it may give a sticky and heavy feeling. When the viscosity is low, such as less than 2,000 cps, So that it can sink to the bottom of the porous foam.

The cosmetic composition according to the present invention may be a cosmetic composition of water in oil in which water is dispersed in the form of an external oil. By controlling the ratio of oil to water, it is possible to control physical properties such as viscosity, impregnation of porous foam, and control of discharge rate at pressurization. However, cosmetic materials such as an underwater type, a solubilized type, and an oil type can be used as well as a water-in-oil type cosmetic material as long as they have the degree of viscosity defined in the present invention.

The porous foam according to the present invention can be impregnated with an appropriate level of the cosmetic composition as shown in the following Experimental Example (Experiment 3), and the degree of expansion of the porous foam by infiltration of the cosmetic composition is small (Experimental Example 4) (Experimental Example 5), the separation and sedimentation of the formulation was small and the use feeling was excellent even when used for a long period of time (Experimental Example 6) (Experimental Example 7), and was stable in impregnation with ester oil, volatile silicone oil, water, polar organic UV blocking agent and the like (Experimental Example 8).

When the porous foam according to the present invention is used, it is possible to prevent sedimentation of the liquid cosmetic composition to the lower part of the foam, even when the porous foam is used for a long time, as compared with the conventional polyurethane foam.

Further, since the durability is excellent, there is no problem that the outer shape is expanded or melted and tears due to interaction with the impregnated liquid cosmetic composition.

Furthermore, when the porous foam is pressed at a normal operating pressure, the impregnated liquid cosmetic composition can be dispensed uniformly and in an appropriate amount, which is excellent in ease of use.

Hereinafter, the constitution and effects of the present invention will be described in more detail with reference to Examples, Comparative Examples and Experimental Examples. However, the following examples, comparative examples, and experimental examples are provided for illustrative purposes only in order to facilitate understanding of the present invention, and the scope and scope of the present invention are not limited thereto.

Example  One: Water type  Manufacture of foundations

As one embodiment of the cosmetic composition that can be used in the present invention, a low viscosity, water-in-oil type foundation having the composition shown in the following table can be prepared.

division Raw material (% by weight) Example 1 Oil component Cyclopentasiloxane 17.0 Phenyl trimecicone 10.0 Caprylic / capric triglyceride 5.0 To a solution of < RTI ID = 0.0 & 7.0 Piggy-10 Dimethicone 2.0 Sorbitan sesquioleate 1.0 To a solution of < RTI ID = 3.0 Incrementer Distearmonium hectorite 0.3 Pigment Titanium dioxide 10.0 Iron oxide 1.2 Zinc oxide 5.0 Water component Purified water to 100 Dipropylene glycol 5.0 Sodium chloride 1.0 glycerin 2.5 Phenoxyethanol 0.3

The oil component and the thickening agent were put in an oil bath and heated to 80 DEG C to make it uniform, and then the pigment was added and dispersed. The aqueous phase was added to the aqueous phase and heated to 80 ° C to completely dissolve the raw material. The raw material was then added to the oil bath in which the pigment was dispersed and emulsified with a homogenizer to prepare a low viscosity water-in-oil type foundation.

The contents were filled in a 100 ml stability vessel and stored in the chamber for one day at 25 ° C and then run for 1 minute at 12 rpm on a Brookfield RV viscometer using a spindle 7 to measure the viscosity at 25 ° C and a viscosity of 15,000 cps Respectively.

Example  2: Preparation of porous foam

The porous foam was prepared as follows.

NBR (trade name: NIPOL LX531b, purchased from Nippon Zeon Co., Ltd.) and SBR (product name: KSL341, purchased from Kumho Petrochemical) were used at the following weight ratios and sulfur, zinc oxide, potassium oleate and TB , Formaldehyde and ammonia), and the resulting mixture was foam-molded into a porous foam while being mixed at a temperature of 28 to 32 DEG C and a pressure of 1 to 1.1 kg / cm < ² > at 120 revolutions per minute, The blowing device was operated to discharge the gas generated during the foaming process.

NBR SBR Example 2-1 70 30 Example 2-2 75 25 Example 2-3 80 20 Examples 2-4 85 15 Example 2-5 90 10 Examples 2-6 95 5 Examples 2-7 99 One Comparative Example 1 0 100 Comparative Example 2 100 0

Experimental Example  1: cell size of the porous foam and Number of cells

The porous foam (Example 2-5) and commercially available porous urethane foam (Fomtec, EZ80N) were magnified 100 times by using an image analyzer, and after measuring the image, the average cell size was measured, (1 inch, about 2.54 cm).

NBR - SBR  Porous foam Porous urethane foam
(Fomtec, EZ80N) Average cell size 0.3015 탆 0.3051 탆 Average number of cells 85 ppi 64 ppi

Experimental Example  2: Hardness of the porous foam

The hardness of the porous foam was measured by using the ASKER hardness F type and the hardness of the sample was measured.

Porous foam Hardness value Example 2-1 70 Example 2-2 66 Example 2-3 62 Examples 2-4 58 Example 2-5 54 Examples 2-6 52 Examples 2-7 51 Comparative Example 1 80 Comparative Example 2 50 Porous urethane foam 35

Experimental Example  3: of porous foam Cosmetics Impregnation amount

After the porous foam was prepared and weighed before impregnating the cosmetic material, it was immersed in the low-viscosity foundation cosmetic material of Example 1 of the present invention for about 3 minutes. Then, the deposited porous foam was lifted using a forceps, It was removed by free fall for 2 minutes. The weight of the porous foam impregnated with the cosmetic material was measured and the weight of the impregnated material was measured in consideration of the weight of the initial foam.

Porous foam Initial Porous Foam Weight Excessive After immersion  Weight of porous foam Example 2-1 0.8395g 14.15 g Example 2-2 0.8225 g 15.26 g Example 2-3 0.8125 g 15.55 g Examples 2-4 0.8001 g 15.68 g Example 2-5 0.7992 g 15.82 g Examples 2-6 0.7901 g 15.92 g Examples 2-7 0.7889 g 16.01 g Comparative Example 1 1.266g 16.25 g Comparative Example 2 0.6820 g 14.06 g Porous urethane foam 0.3102 g 18.06g

As can be seen from the above results, the porous foam of the present invention could easily impregnate the cosmetic composition to an appropriate level.

Experimental Example  4: Cosmetics  Composition Impregnation  Degree of expansion deformation of porous foam

In order to measure the degree of expansion deformation according to the impregnation of the cosmetic composition of the porous foam according to the present invention, the following test was conducted. After the porous foam was prepared and the thickness before the impregnation with the cosmetic was measured, it was immersed in the same amount (15 g) of the low-viscosity foundation cosmetic of Example 1 of the present invention for about 3 minutes, and then the deposited porous foam And the cosmetics which were lifted up and not absorbed were removed for 2 minutes by a free fall method. After the cosmetic was impregnated, the thickness of the porous foam was measured, and the expansion ratio (%) after impregnation was calculated.

Porous foam Size of porous foam
( Cosmetics Precipitation ) Size of porous foam
( Cosmetics After impregnation ) Porous foam
Degree of expansion (%) Example 2-1 10.03 mm 12.77mm 27% Example 2-2 10.02 mm 12.34 mm 23% Example 2-3 10.09mm 11.77 mm 17% Examples 2-4 10.13 mm 11.09 mm 9% Example 2-5 10.07mm 10.96mm 8% Examples 2-6 10.10mm 11.55 mm 14% Examples 2-7 10.07mm 11.67 mm 16% Comparative Example 1 10.13 mm 13.99mm 38% Comparative Example 2 10.06mm 12.72 mm 26% Porous urethane foam 10.12 mm 11.74 mm 16%

Experimental Example  5: Porous foam Discharge amount

In order to measure the discharge amount of the porous foam according to the present invention, the following experiment was conducted. A pouffe for application (cut at 1 cm x 1 cm from the place of purchase) was attached to a press machine (LLOYD LS1) capable of pressing the sample with the same depth, the same area, and the same force to prepare a porous foam impregnated with a cosmetic composition , Cut to a height of 1 cm) was pressed at the same pressure (0.4 kg / cm ² ) for 3 seconds, the amount (g) of the cosmetic composition coming out from the porous foam was calculated. Each puff for application was replaced for every 10 tests.

Discharge  Number of times 2 4 6 8 10 12 14 16 18 20 Example 2-1 0.15 0.14 0.13 0.16 0.14 0.16 0.18 0.15 0.15 0.16 Example 2-2 0.16 0.15 0.15 0.15 0.15 0.16 0.17 0.17 0.16 0.14 Example 2-3 0.15 0.16 0.16 0.14 0.15 0.15 0.15 0.16 0.15 0.14 Examples 2-4 0.16 0.15 0.15 0.15 0.16 0.15 0.14 0.14 0.14 0.16 Example 2-5 0.16 0.15 0.16 0.16 0.15 0.14 0.15 0.15 0.16 0.15 Examples 2-6 0.15 0.14 0.16 0.15 0.15 0.16 0.17 0.17 0.15 0.14 Examples 2-7 0.16 0.15 0.16 0.14 0.15 0.15 0.15 0.14 0.16 0.14 Comparative Example 1 0.14 0.15 0.15 0.15 0.14 0.15 0.14 0.15 0.15 0.14 Comparative Example 2 0.14 0.15 0.17 0.17 0.18 0.19 0.18 0.18 0.19 0.18 Porous urethane foam 0.15 0.25 0.15 0.26 0.13 0.28 0.24 0.18 0.20 0.14

As shown in the above results, the porous urethane foam was discharged in various amounts from 0.14 g to 0.25 g (min / max excluded). In the case of the porous foam of the present invention, 0.14 g to 0.17 g, As shown in FIG. In the case of Comparative Example 1, the discharge was not properly performed, and in Comparative Example 2, the discharge amount was excessive.

Experimental Example  6: On porous foam Impregnated Cosmetics  The storage stability of the composition according to the repetitive pressure and Feeling

The following tests were conducted to evaluate the degree of separation and sedimentation of a formulation when a porous foam impregnated with a low viscosity cosmetic composition was pressed using a hand or a makeup tool. After the low-viscosity cosmetic material prepared according to Example 1 was impregnated into the porous foam, it was repeated every day for 2 months in the following manner. After the experiment, the separation and sedimentation degree of the cosmetic material was visually observed as shown in the following table. Respectively.

1) Press the porous foam impregnated with cosmetics 10 times with the same pressure.

2) Store in a constant temperature bath at 25 ℃ for 24 hours.

3) Take out the stored sample and press it repeatedly 10 times at the same pressure.

4) Store in a constant temperature bath at 25 ℃ for 24 hours.

The following table shows the storage stability and feeling of use of the cosmetic composition impregnated in the porous foam according to the repetitive pressure. Stability evaluation criteria were as follows: good: unstable: △, separation: ×, and the feeling of use evaluation criteria was rated on a 5-point scale (5 is the best).

Example  2-3 Example  2-5 Example  2-6 Example  2-7 Comparative Example  One Comparative Example  2 Urethane foam stability 1 day ○ ○ ○ ○ △ ○ ○ 3 days ○ ○ ○ ○ × ○ ○ 5 days ○ ○ ○ ○ × ○ ○ 7 days ○ ○ ○ ○ × ○ ○ 2 weeks ○ ○ ○ ○ × ○ ○ 3 weeks ○ ○ ○ ○ × ○ ○ 4 weeks ○ ○ ○ ○ × ○ ○ 5 weeks △ ○ △ ○ × △ ○ 6 weeks △ ○ △ ○ × △ ○ 7 weeks △ ○ △ ○ × △ △ 8 weeks △ ○ △ ○ × △ △ Feeling 1 day ○ ○ ○ △ × △ ○ 3 days ○ ○ ○ △ × △ ○ 5 days △ ○ △ △ × × ○ 7 days △ ○ △ ○ × × ○ 2 weeks △ ○ △ △ × × ○ 3 weeks △ ○ △ △ × × △ 4 weeks △ ○ △ △ × × △ 5 weeks △ ○ △ △ × × △ 6 weeks △ ○ △ × × × × 7 weeks × △ △ × × × × 8 weeks × △ × × × × ×

As shown in the above table, the feeling of use in Comparative Example 1 was similar to that in Example 2-5 of the present invention, but the storage stability was poor. In Comparative Example 2, the porous foam impregnated with the cosmetic composition And the feeling of use was unstable from the 5th week. Also, it was pointed out that the surface of the foam was dry from the 2nd week onwards, and the content of the contents was difficult to be controlled. This point was pointed out that the cosmetic composition was clogged or had a feeling of tough feeling . The conventional urethane foam was unstable from the 7th week and the separation and sedimentation of the composition occurred from the 8th week.

On the other hand, the porous foam according to the present invention showed excellent storage stability over a long period of time without sedimentation of the cosmetic composition even when repetitive pressure was applied, and kept a high grade feeling for a long period of time.

Experimental Example  7: Storage stability of porous foam

In order to evaluate the degree of preservation of the contents of the porous foam, the following experiment was conducted using the cosmetic composition having the composition of Example 1 as one embodiment of the present invention.

First, the weight of the cosmetic composition to be immersed was measured, and the porous foam immersed in the cosmetic composition was weighed in a cosmetic container. The cosmetic container was taken out of the container at a high temperature of 40 캜 while being kept at a high temperature of 40 캜, and the weight of the container was measured. The loss (mg) of the contents was measured for 4 weeks.

Porous foam
(Example 2-5) Porous foam
(Comparative Example 1) Porous foam
(Comparative Example 2) Porous
Urethane foam Contents alone Loss amount 1 day 0.03 g 0.03 g 0.03 g 0.03 g 0.12 g Loss amount 3 days 0.09 g 0.09 g 0.09 g 0.13 g 0.15 g Loss amount 5 days 0.12 g 0.13 g 0.15 g 0.45 g 0.25 g Loss amount 7 days 0.20 g 0.21 g 0.22 g 0.63 g 0.33 g Loss amount Two weeks 0.26 g 0.27 g 0.33 g 0.85g 0.98 g Loss amount Three weeks 0.40 g 0.48 g 0.55 g 1.35g 1.25 g Loss amount Four weeks 0.56 g 0.58 g 0.72 g 1.58 g 2.05 g

The porous foam according to the present invention showed less loss of contents than the commercially available porous urethane foam, Comparative Examples 1 and 2, indicating that the preservation of the contents was excellent when the cosmetic was impregnated.

Experimental Example  8: Chemical resistance of porous foam

In order to evaluate the chemical resistance of the porous foam, an ester oil, a polar organic sunscreen agent, a volatile silicone oil and water which can be used as a raw material for constituting the low viscosity cosmetic material in the porous foam were each impregnated into the porous foam, The size increase rate of the porous foam was measured. The results are shown in the following table.

Cosmetics  Constituent raw material Porous foam
( Example  2-5) Porous foam
( Comparative Example  One) Porous foam
( Comparative Example  2) Porous
Urethane foam Ester oil 1.21% 5.38% 20.05% 1.38% Polar organic sunscreen 1.21% 4.38% 21.09% 1.33% Volatile silicone oil 0.56% 2.16% 5.27% 0.58% water 0.4% 0.3% 0.5% 0.52%

As shown in the above table, it can be seen that the porous foam according to the present invention is stable against ester oil, polar organic UV screening agent, volatile silicone oil and water even at high temperature without alteration or deformation, and in relation with cosmetics.

Although the present invention has been described in connection with the preferred embodiments and experimental examples, it is to be understood that the present invention is not limited to the above-described embodiments and experimental examples. Various modifications and variations are possible. Therefore, the scope of the present invention should not be construed as being limited to the embodiments and the experimental examples described above, but should be determined by equivalents to the appended claims, as well as the following claims.

Claims (10)

1. A cosmetic comprising a porous foam which is a foam of a blend of acrylonitrile butadiene rubber (NBR) and styrene-butadiene rubber (SBR) and a cosmetic composition impregnated therewith, wherein said acrylonitrile butadiene rubber (NBR) and styrene- SBR) is 99: 1 to 80:20, and the porous foam has a hardness of 30 to 80 on the basis of ASKER hardness type F (Type F). delete delete delete The cosmetic product according to claim 1, wherein the porous foam has a cell size of 50 to 2,000 mu m, and the number of cells per inch is 30 to 120 ppi. The cosmetic product according to claim 1, wherein the porous foam has a density of 0.02 to 0.3 g / cm ³ . The cosmetic product according to claim 1, wherein the porous foam has an open cell structure. delete The cosmetic product of claim 1, wherein the porous foam is a coated or flocked foam. The cosmetic composition according to claim 1, wherein the cosmetic composition has a viscosity of 2,000 to 15,000 cps.