KR101573574B1 - Cosmetic composition comprising film forming agents for skin - Google Patents

Abstract

The present invention relates to a skin cosmetic composition containing a film-forming agent which forms a film upon application of the skin.
The cosmetic composition for skin containing the film-forming agent according to the present invention can be easily removed with lukewarm water after being applied to the skin. Especially, since it is applied to the skin before the coloring, it is possible to remove the color makeup with the lukewarm water without using a separate cleansing product Do. In addition, the composition is excellent in feeling and skin stability, and can effectively remove contaminants as well as color cosmetics.

Description

The present invention relates to a cosmetic composition comprising a film-forming agent,

TECHNICAL FIELD The present invention relates to a cosmetic composition for skin containing a film-forming agent for forming a film upon application of a skin, and more particularly, to a cosmetic composition for skin which is capable of removing color cosmetics with only lukewarm water without separate cleansing.

In general, cleansing products for cleansing a color cosmetic composition include cream, oil, liquid, and transparent gel phases, and emulsion type, oily type, and aqueous type are used depending on the type.

The emulsion type is exemplified by cleansing lotion and cream, which are characterized by giving a cleansing effect by mixing nonionic surfactant with a large amount of oil. The emulsion type has 20% to 70% by weight of oily components, which is excellent in cleansing effect and excellent in softness and massage effect when used. However, if the amount of oil remaining in the skin after use is too much to remove with water, have. In addition, there is a skin irritation due to physical stimulation due to the tissue off, and there is an inconvenience that even after wiping with a tissue, oily sensation remains, so that it is necessary to use a soap which is foam cleansing to perform a water-based cleansing.

The oil-based cleansing oil contains almost 100% by weight of oil and is free of surfactant, and is known to have excellent color tone removing effect. However, since the amount of oil remaining on the skin after use is large, it needs to be wiped off with a tissue off, which may cause problems such as skin irritation.

In addition, the cleansing gel represented by the aqueous type includes a microemulsion gel type using a large amount of nonionic surfactant and a large amount of oil, and a cleansing gel type using anionic surfactant. The microemulsion gel type has a very high cleaning power due to a large amount of oil and a surfactant. However, the microemulsion gel type has a problem of stiff feeling, persistent oil on the skin after use, and skin irritation due to the use of a large amount of surfactant. In addition, the gel type using anionic surfactant has good washability and freshness in water, but has a weak color cleansing power and may cause skin irritation.

In order to solve the problems of the cleansing product, a surfactant-free cleansing composition containing a small amount of oil is used, or a cleansing composition for removing an oil-free oil-in-water oil cosmetic composition is used. However, in the case of the former, it is difficult to sufficiently remove color make-up using only a small amount of oil, and in the latter case, there is a limit to remove other color cosmetic ingredients other than silicone.

In another aspect of the present invention, there is provided a method of removing color makeup using only lukewarm water without using a cleansing product, in order to solve problems such as stimulation of a surfactant, residual oil after use, and troublesome cleansing in a cleansing product. However, studies on the non-use of cleansing products are in short supply, and it is required to develop a product which can remove color makeup with lukewarm water without any separate cleansing.

The present inventors have found that a copolymer containing an acrylic acid unit and an acrylamido butane sulfonic acid unit forms a coating upon application of a skin, and can perform color cosmetic treatment thereon, and without a separate cleansing step It was confirmed that the coating film can be removed with lukewarm water using lukewarm water. The present invention is based on this.

An embodiment of the present invention includes a film forming agent which is a copolymer comprising an acrylic acid unit and an acrylamido butane sulfonic acid unit, The present invention provides a cosmetic composition for skin.

Hereinafter, the present invention will be described.

The film-forming agent according to the present invention is characterized in that a film (film) is formed upon application of the skin to make a color tone on the film, and can be easily removed even with lukewarm water. Particularly, the film forming agent is composed of a copolymer containing an acrylic acid unit and an acrylamidobutane sulfonic acid unit, and the cosmetic composition containing the acrylic acid unit and the acrylamidobutane sulfonic acid unit has excellent feeling and skin stability and can be easily washed with lukewarm water.

The composition according to the present invention can remove color makeup with lukewarm water without cleansing using a separate cleansing product when applying the composition to the skin and then making a color hue.

In the present invention, the acrylic acid is an unsaturated carboxylic acid containing a vinyl group and a carboxylic acid as a compound represented by the following general formula (3).

(3)

Acrylic acid can be obtained by direct oxidation of propylene or hydrolysis of acrylonitrile with sulfuric acid. Acrylic acid is easy to polymerize, and the polymer produced by polymerization of acrylic acid alone dissolves in water, resulting in a solution having high viscosity.

In the present invention, the acrylic acid unit constituting the copolymer may be derived from the above-described acrylic acid, but is not limited thereto. In the case of acrylic acid, CH ₂ = CH ₂ - groups may be added to form an acrylic acid unit according to the present invention.

In the present invention, acrylamidobutane sulfonic acid can be represented by the following general formula (4).

[Chemical Formula 4]

In the present invention, the acrylamidobutane sulfonic acid unit constituting the copolymer may be derived from the acrylamidobutane sulfonic acid represented by the above formula (4), but is not limited thereto. In the case of the acrylamidobutane sulfonic acid, the CH ₂ ═CH ₂ - group may be added to each other to form the acrylamidobutane sulfonic acid unit according to the present invention.

The copolymer of the present invention is a film-forming agent comprising a copolymer comprising an acrylic acid unit and an acrylamidobutane sulfonic acid unit. The copolymer can be applied on the skin to form a film (film), and can easily be removed with only lukewarm water.

More specifically, the copolymer according to the present invention is characterized in that the nitrogen contained in the acrylamidobutane sulfonic acid unit can be hydrogen-bonded to water. As a result, the copolymer is dissolved in a state of hydrogen bonding with water at a low temperature, but when the temperature is elevated, the hydrogen bonding may weaken and a gelling phenomenon may occur. Therefore, it can exist in a state in which it is combined with water at the time of application (low temperature) of the skin, that is, in a dissolved state, and unlike the general film forming agent, there is no foreign body sensation. In case of low temperature water (over 40 ℃), the hydrogen bonding with water is weakened due to the rise in temperature, so that the lipophilic parts are bundled together to minimize the part in contact with water. Such gelling phenomenon easily removes the film and color makeup .

The copolymer of the present invention can be obtained by polymerizing acrylic acid and acrylamidobutane sulfonic acid through a conventional method known in the art.

The copolymer may be a random copolymer and is not particularly limited.

In the present invention, the copolymer may be a copolymer comprising 95 to 50 mol% of acrylic acid units and 5 to 50 mol% of acrylamidobutane sulfonic acid units. If the amount of the acrylic acid unit is less than 50 mol%, there is a problem that it is difficult to dissolve in water at the time of production. If the amount is more than 95 mol%, there is a problem that it is difficult to wash the color tone with lukewarm water.

More specifically, the copolymer may be a copolymer having an acrylic acid unit represented by the following formula (1) and an acrylamidobutane sulfonic acid unit represented by the following formula (2), and having a molecular weight of 50,000 to 300,000.

[Chemical Formula 1]

(2)

N and m are an integer of 1 or more, specifically, n is an integer of 180 to 3600, and m is an integer of 30 to 1100.

,

,

,

,

,

,

,

,

,

또는

일 수 있다. 예를 들어, -C₄H₈-가

인 경우, 본 발명에 따른 아크릴아미도 부탄 설폰산 단위는 2-아크릴아미도 부탄-2-설폰산(2-acrylamido butane-2-sulfonic acid)일 수 있으며, -C₄H₈-가

인 경우, 본 발명에 따른 아크릴아미도 부탄 설폰산 단위는 2-아크릴아미도-2-메틸프로판 설폰산(2-acrylamido-2-methylpropane sulfonic acid)일 수 있다.
In Formula 2, -C ₄ H ₈ - (-butane-) may be a linear or branched saturated hydrocarbon group, and is not particularly limited. Therefore, -C ₄ H ₈ -

,

,

,

,

,

,

,

,

,

or

Lt; / RTI > For example, -C ₄ H ₈ -

, The acrylamidobutane sulfonic acid unit according to the present invention may be 2-acrylamido butane-2-sulfonic acid, and -C ₄ H ₈ -

Acrylamido-2-methylpropane sulfonic acid, the acrylamidobutane sulfonic acid unit according to the present invention may be 2-acrylamido-2-methylpropane sulfonic acid.

The cosmetic composition for skin of the present invention contains the film forming agent, and the content of the film forming agent may be 0.05 to 20% by weight based on the total amount of the composition. If the content of the film forming agent is less than 0.05% by weight, there may be a problem that the removal of the color tone make-up is not smooth when washing with lukewarm water. When the content is more than 20% by weight, the film formation on the skin becomes excessive, There may be a problem of dropping. Preferably, the content of the film forming agent may be 1 to 10% by weight based on the total amount of the composition.

The skin cosmetic composition of the present invention can form a water-removable film upon application of the skin. Furthermore, the composition can be applied to the skin before the color tone make-up.

In one embodiment of the present invention, the cosmetic composition for skin containing the film-forming agent was applied to the skin before making up the color tone and washed with lukewarm water. As a result, it was confirmed that the cleansing and cleansing of the color makeup were excellent (Experimental Example 1 ), And further, it was confirmed that the removal rate of the skin contaminant was excellent.

The skin cosmetic composition of the present invention may contain ingredients other than the above-mentioned film formers, which are conventionally acceptable in cosmetic compositions, and may contain, for example, oils, surfactants, stabilizers and water. Further, it may further contain an aqueous polymer, a coloring matter, a flavoring or an antiseptic commonly used in a cosmetic composition. The aqueous polymer may be, for example, sodium alginate, carboxymethylcellulose, polyacrylic acid, and xanthan gum, but is not limited thereto. In addition, the cosmetic composition for skin of the present invention may further include various nutrients and various vitamins that can supply nutrition to the skin. Such nutritional ingredients are contained in the film formed upon application of the skin, .

The cosmetic composition for skin of the present invention can be prepared in any formulations conventionally produced in the art and can be used in the form of solutions, suspensions, emulsions, pastes, gels, creams, lotions, powders, oils, powder foundations, Liquid foundation, wax foundation, spray, and the like. More specifically, it can be manufactured in the form of a flexible lotion (skin), a nutritional lotion (milk lotion), a nutritional cream, a massage cream, an essence, an eye cream, a pack, a spray or a powder. Preferably, the cosmetic composition for skin of the present invention is preferably applied to the skin before the makeup of the color, so that it can be manufactured as a base product which can be applied before the color makeup.

When the formulation of the present invention is a paste, cream or gel, an animal oil, vegetable oil, wax, paraffin, starch, tracant, cellulose derivative, polyethylene glycol, silicone, bentonite, silica, talc or zinc oxide may be used as the carrier component .

In the case where the formulation of the present invention is a powder or a spray, lactose, talc, silica, aluminum hydroxide, calcium silicate or polyamide powder may be used as a carrier component. In particular, in the case of a spray, a mixture of chlorofluorohydrocarbons, / Propane or dimethyl ether.

When the formulation of the present invention is a solution or an emulsion, a solvent, a dissolving agent or an emulsifying agent is used as a carrier component, and examples thereof include water, ethanol, isopropanol, ethyl carbonate, ethyl acetate, benzyl alcohol, benzyl benzoate, , 3-butyl glycol oil, glycerol aliphatic ester, polyethylene glycol or sorbitan fatty acid esters.

In the case where the formulation of the present invention is a suspension, a carrier such as water, a liquid diluent such as ethanol or propylene glycol, a suspending agent such as ethoxylated isostearyl alcohol, polyoxyethylene sorbitol ester and polyoxyethylene sorbitan ester, Cellulose, aluminum metahydroxide, bentonite, agar or tracant, etc. may be used.

The cosmetic composition for skin comprising the film-forming agent according to the present invention can be easily removed with lukewarm water after being applied to the skin, and in particular, it can be applied to the skin before the skin coloring so that it is possible to remove the color makeup with lukewarm water without cleansing using a separate cleansing product It is effective. In addition, the composition is excellent in feeling and skin stability, and can effectively remove contaminants as well as color cosmetics.

Hereinafter, the present invention will be described in more detail with reference to the following examples and experimental examples. However, the following examples and experimental examples are provided for illustrating the present invention, and the scope of the present invention is not limited thereto.

The copolymer containing the acrylic acid unit and acrylamidobutane sulfonic acid unit of the present invention used in the following Examples and Experimental Examples was purchased from Lubrizol and used in the experiment. Specifically, acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer corresponds to a polymer having a chemical structure represented by Chemical Formula 5 below.

[Chemical Formula 5]

Wherein n is an integer of 1000 to 1500, m is an integer of 100 to 150, and the molecular weight is a random copolymer of 120,000 or less.

Example  1 to 5 and Comparative Example  One

After the water phase and the oil phase were completely dissolved according to the composition (unit: wt%) shown in Table 1, the oil phase was gradually added to the water phase while stirring with a homomixer at 4500 - 5500 rpm. Finally, the ethanol phase was added, And then emulsified at 5500 rpm for 4 minutes to prepare a cream-like O / W cosmetic composition (containing film-forming agent, Examples 1 to 5) and an O / W cosmetic composition for comparison (Comparative Example 1).

Raw material name Example Comparative Example One 2 3 4 5 One Awards Purified water to 100 to 100 to 100 to 100 to 100 to 100 KOH q.s q.s q.s q.s q.s q.s Acrylic acid / 2-acrylamido-2-methylpropanesulfonic acid copolymer 0.5 One 2 4 8 - Dipropylene glycol 5 5 5 5 5 5 glycerin 3 3 3 3 3 3 EDTA-3Na (5%) 0.4 0.4 0.4 0.4 0.4 0.4 Xanthan gum 0.2 0.2 0.2 0.2 0.2 0.2 Acrylate / C10-30 alkyl acrylate copolymer 0.3 0.3 0.3 0.3 0.3 0.3 Cyclomethicone 5 5 5 5 5 5 Paid Triethylhexanone 3 3 3 3 3 3 Cetearyl alcohol 2 2 2 2 2 2 PEG-40 stearate 2 2 2 2 2 2 Mineral oil 2 2 2 2 2 2 Alcohol 5 5 5 5 5 5 Ethanol phase Methyl paraben 0.2 0.2 0.2 0.2 0.2 0.2 Ethyl paraben 0.07 0.07 0.07 0.07 0.07 0.07 incense q.s q.s q.s q.s q.s q.s

Experimental Example  1: Sensory experiment

The O / W cosmetic compositions prepared in Examples 1 to 5 and Comparative Example 1 were applied to the face of 20 persons from 20 to 40 years old before the color tone, After washing with lukewarm water without separate cleansing step. After that, the washability and cleansing power of the shade makeup were scored according to the following evaluation criteria, and the sensory test results are shown in the following Table 2 using the following Equation 1.

Evaluation criteria: Very good (5), Good (3), Average (0), Bad (-3), Very poor (-5)

[Equation 1]

Example Comparative Example One 2 3 4 5 One Cleansing power 2.1 3.5 4.1 4.5 4.8 -4.5 Washability 2.3 3.1 4.1 4.4 4.5 -4.8

As shown in Table 2, the cosmetic compositions according to Examples 1 to 5 were evaluated to have excellent cleansing power and washability as a whole in comparison with Comparative Example 1.

Experimental Example  2: Measurement of pollutant removal rate

The O / W cosmetic compositions prepared in Examples 1 to 5 and Comparative Example 1 were applied to the habits of the tester and then the standard contaminants were applied thereon. Using the reciprocating motion of the Vitro-dyne equipped with a cotton swab, the standard contaminants applied to the habock of the subject were removed and the remaining contaminants were sampled and quantitated by spectroscopy to calculate the contaminant removal rate. The results are shown in Table 3 below.

Example Comparative Example One 2 3 4 5 One Pollutant removal rate 51 72 88 91 93 13

As shown in Table 3, the cosmetic compositions according to Examples 1 to 5 were found to be much superior to those of Comparative Example 1 in that the contaminants applied on the skin-applied composition were much better removed.

Claims (7)

A film forming agent which is a copolymer comprising an acrylic acid unit and an acrylamido butane sulfonic acid unit,
Wherein the film forming agent forms a film which is removable only with lukewarm water when applying the skin.
delete The cosmetic composition for the skin according to claim 1, which is applied to the skin before the color tone make-up.
The cosmetic composition for the skin according to claim 1, wherein the copolymer is a random copolymer.
The cosmetic composition for the skin according to claim 1, wherein the copolymer comprises 95 to 50 mol% of acrylic acid units and 5 to 50 mol% of acrylamidobutane sulfonic acid units.
The cosmetic composition for skin according to claim 1, wherein the copolymer has an acrylic acid unit represented by the following formula (1) and an acrylamidobutane sulfonic acid unit represented by the following formula (2) and having a molecular weight of 50,000 to 300,000:
[Chemical Formula 1]

(2)

N and m are an integer of 1 or more,
In Formula 2, C ₄ H ₈ is a linear or branched saturated hydrocarbon group.
The cosmetic composition for skin according to claim 1, wherein the content of the film forming agent is 0.05 to 20% by weight based on the total amount of the composition.