Patent Description:
Lip cosmetics, such as lipsticks and lip glosses, and makeup cosmetics, such as cheek rouges and eye shadows, have a makeup effect that can change the impression of a user. When choosing such cosmetics, color is considered an important factor. Recently, there is increasing demand for makeup cosmetics that have vivid colors and are capable of imparting transparent impression. For example, lipsticks having high luminance and fluorescent colors are attracting attention.

In general, makeup cosmetics contain oily base materials and coloring materials (coloring agents). In this case, coloring materials are responsible for color development when makeup cosmetics are applied to the lips or skin.

Coloring materials contained in cosmetics include organic synthetic colors (also called tar colors) and inorganic pigments, and the organic synthetic colors are classified into dyes and organic pigments. In this case, the dyes include water-soluble dyes and oil-dispersible dyes, and the organic pigments include lake colors prepared by insolubilizing water-soluble or poorly water-soluble dyes.

To date, since there are few kinds of cosmetic colors that can be used in anhydrous formulations, it is difficult to realize various colors in cosmetics for lips, such as lipsticks and lip glosses. In addition, water-soluble dyes are difficult to use in anhydrous formulations due to intrinsic properties thereof.

In this regard, in <CIT>, a makeup cosmetic capable of developing a fluorescent color is disclosed. However, according to the patent, the color of an oil-dispersible dye may be improved, but the cosmetic is not applicable to water-soluble dyes.

Therefore, there is a need for development of a coloring material, using limited kinds of cosmetic colors that pass all global regulations, capable of broadening the spectrum of color expression that cannot be realized with conventional dyes and a method of preparing the coloring material.

Therefore, the present invention has been made in view of the above problems, and it is one object of the present invention to provide a novel cosmetic composition for lips including a coloring material based on a water-soluble dye that is capable of being used in cosmetics of anhydrous formulations, such as lipsticks and lip glosses. According to the present invention, color limitation in conventional cosmetic coloring materials, especially cosmetics of anhydrous formulations, may be overcome.

The present invention provides a cosmetic composition for lips, comprising a wax and a coloring material including one or more selected from the group consisting of a polyurethane powder and a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more; and a water-soluble dye represented by Structural Formula <NUM> below. <CHM>
<CHM>.

The coloring material used in the cosmetic composition for lips of the present invention including a water-soluble dye; and a polyurethane-based or polyamide-based powder expresses a fluorescent color tone, has a reflectance of <NUM> or more, and expresses a novel color tone with very high chroma and value. When the coloring material is used, water-soluble dyes that cannot be used in conventional anhydrous formulations can be used in anhydrous formulations. Thus, the present invention provides a cosmetic composition for lips capable of implementing a color tone that cannot be implemented using conventional dyes or lake colors.

To overcome the limitations of dyes capable of being used in anhydrous formulations, the present inventors have continually tried to prepare a water-soluble dye-based coloring material that is capable of being used in anhydrous formulations. As a result, the present inventors confirmed that, when using a coloring material including a polyurethane powder and/or a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more; and a water-soluble dye, fluorescence properties not observed in conventional water-soluble dyes were obtained, dispersibility was excellent even in anhydrous formulations, and the coloring material was applicable to makeup products of anhydrous formulations. Based on these results, the present inventors conducted further studies to complete the present invention. According to the present invention, when the coloring material is used, water-soluble dyes that may not be used in conventional anhydrous formulations may be used in anhydrous formulations, fluorescence properties that may not be observed in conventional dyes may be obtained, and vivid colors with high chroma and value may be expressed compared to conventional lake colors. Accordingly, the color tone of makeup cosmetics may be improved, and the range of colors that may be implemented may be widened.

The present invention relates to a cosmetic composition for lips, comprising a wax and a coloring material including a polyurethane powder and/or a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more; and a water-soluble dye.

It allows the water-soluble dye to be used in anhydrous formulations through the coloring material, thereby providing a cosmetic that expresses a color of an extended spectrum that could not be achieved in anhydrous formulations up to now. Thus, the coloring material may be a cosmetic coloring material.

The coloring material used in the cosmetic composition for lips of the present invention may have a reflectance of <NUM> or more. Reflectance indicates the degree to which a coloring material reflects light depending on wavelength. Reflectance exceeding <NUM> means that the quantity of light reflected is more than the quantity of light absorbed. That is, coloring materials having a reflectance of <NUM> or more may express more vivid colors and thus may be suitable as components of cosmetics. In one embodiment of the present invention, the coloring material has a reflectance of greater than <NUM> at a wavelength of <NUM> to <NUM>.

In addition, the coloring material used in the cosmetic composition for lips of the present invention may have fluorescence expression properties.

The coloring material may be obtained by combining a polyurethane powder and/or a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more and a water-soluble dye, or by applying a water-soluble dye to the surface of a polyurethane powder and/or a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more. As compared to a cosmetic composition simply including the powder and the water-soluble dye, a cosmetic composition including the coloring material obtained by applying the water-soluble dye to the surface of the powder may have higher reflectance, and may have fluorescence expression properties. In addition, the coloring material may be efficiently dispersed even in cosmetics of anhydrous formulations.

The water-soluble dye refers to a dye having a property of dissolving in water-soluble solvents among dyes suitable for cosmetics, and refers to a dye having hydrolyzable properties among dyes suitable for cosmetics as defined by the Korea Food and Drug Administration.

The water-soluble dye used in the cosmetic composition for lips of the present invention is represented by Structural Formula <NUM> below. The compound represented by Structural Formula <NUM> may be a salt compound. <CHM>
<CHM>
wherein R<NUM> is oxygen (O) or N(C<NUM>H<NUM>)<NUM>, wherein, when R<NUM> is oxygen, n is <NUM>, and when R<NUM> is N(C<NUM>H<NUM>)<NUM>, n is <NUM>; R<NUM> and R<NUM> are each independently hydrogen, bromine (Br), or iodine (I); R<NUM> is COO- or SO<NUM>-; R<NUM> is hydrogen, chlorine, or SO<NUM>-, wherein, when R<NUM> is hydrogen or chlorine, m is <NUM>, and when R<NUM> is SO<NUM>-, m is <NUM>; R<NUM> is hydrogen or chlorine; and X is aluminum, calcium, sodium, or potassium.

In Structural Formula <NUM>, when R<NUM> is oxygen (O), R<NUM> may be COO-, and R<NUM> may be hydrogen or chlorine. In this case, one of two R<NUM> may represent an ionic form of O-.

Alternatively, in Structural Formula <NUM>, when R<NUM> is N(C<NUM>H<NUM>)<NUM>, R<NUM> and R<NUM> may be SO<NUM>-. In this case, one of two R<NUM> may represent an ionic form of N(C<NUM>H<NUM>)<NUM>+. A water-soluble dye having a structure represented by Structural Formula <NUM> may be combined with a polyurethane powder and/or a polyamide powder to obtain a coloring material. The color properties of the coloring material may be improved compared to conventional water-soluble dyes. Compared to conventional lake colors, when the coloring material is included in cosmetics, colors with high value and chroma may be expressed. In particular, since the coloring material has excellent dispersibility even in anhydrous formulations, the coloring material may efficiently be used in cosmetic compositions of anhydrous formulations such as lipsticks. In addition, the spectrum of colors that may be expressed in conventional anhydrous formulations may be broadened.

Preferably, the water-soluble dye includes one or more selected from the group consisting of Pigment Red No. <NUM>-<NUM>, Pigment Red No. <NUM>-<NUM>, Pigment Red No. <NUM>-<NUM>, Pigment Red No. <NUM>-<NUM>, Pigment Orange No. <NUM>, Pigment Red No. <NUM>, Pigment Yellow No. <NUM>-<NUM>, and Pigment Yellow No. <NUM>-<NUM>.

Pigment Red No. <NUM>-<NUM> may be a disodium salt of <NUM>-(<NUM>,<NUM>,<NUM>,<NUM>-tetrachloro-<NUM>-carboxyphenyl)-<NUM>-hydroxy-<NUM>,<NUM>,<NUM>,<NUM>-tetrabromo-<NUM>-xanthene-<NUM>-one, and may be represented by Chemical Formula <NUM> below.

Pigment Red No. <NUM>-<NUM> may be a dipotassium salt of <NUM>-(<NUM>,<NUM>,<NUM>,<NUM>-tetrachloro-<NUM>-carboxyphenyl)-<NUM>-hydroxy-<NUM>,<NUM>,<NUM>,<NUM>-tetrabromo-<NUM>-xanthene-<NUM>-one, and may be represented by Chemical Formula <NUM> below.

Pigment Red No. <NUM>-<NUM> may be a disodium salt of <NUM>-(<NUM>-carboxyphenyl)-<NUM>-hydroxy-<NUM>,<NUM>,<NUM>,<NUM>-tetrabromo-<NUM>-xanthene-<NUM>-one, and may be represented by Chemical Formula <NUM> below. <CHM>
<CHM>.

Pigment Red No. <NUM>-<NUM> may be a dipotassium salt of <NUM>-(<NUM>-carboxyphenyl)-<NUM>-hydroxy-<NUM>,<NUM>,<NUM>,<NUM>-tetrabromo-<NUM>-xanthene-<NUM>-one, and may be represented by Chemical Formula <NUM> below.

Pigment Orange No. <NUM> may be a disodium salt of <NUM>-(<NUM>-carboxyphenyl)-<NUM>-hydroxy-<NUM>,<NUM>-diiodine-<NUM>-xanthene-<NUM>-one, and may be represented by Chemical Formula <NUM> below. <CHM>
<CHM>.

Pigment Red No. <NUM> may be a monosodium salt of <NUM>-[[N,N-diethyl-<NUM>-(diethylamino)-<NUM>-xanthene-<NUM>-imino]-<NUM>-yl]-<NUM>-sulfobenzenesulfonate, and may be represented by Chemical Formula <NUM> below. Pigment Red No. <NUM> is also referred to as Acid Pigment Red No. <NUM>.

Pigment Yellow No. <NUM>-<NUM> may be a disodium salt of <NUM>-(<NUM>-carboxyphenyl)-<NUM>-hydroxy-<NUM>-xanthene-<NUM>-one, and may be represented by Chemical Formula <NUM> below. <CHM>
<CHM>.

Pigment Yellow No. <NUM>-<NUM> may be a dipotassium salt of <NUM>-ortho-carboxyphenyl-<NUM>-hydroxy-<NUM>-isoxanthone, and may be represented by Chemical Formula <NUM> below.

The water-soluble dye used in the cosmetic composition for lips of the present invention has a structure represented by Structural Formula <NUM>. With this structural feature, although the water-soluble dye is a water-soluble dye, by combining the water-soluble dye and a polyurethane powder and/or a polyamide powder, the coloring material having fluorescence expression properties may be obtained.

The powder used in the cosmetic composition for lips of the present invention refers to a collection of solid particles or fine solid particles, and may be used in combination with powders commonly used in the art to which the present invention pertains.

The polyurethane powder includes all polyurethane-based powders, and may be a polymer of isocyanate group/OH group.

As a specific example, the polyurethane powder may include one or more selected from the group consisting of a hexamethylene diisocyanate (HDI)/trimethylol hexyllactone crosspolymer; and a hexamethylene diisocyanate (HDI)/polypropylene glycol (PPG)/polycaprolactone crosspolymer, without being limited thereto.

In consideration of the physical properties of compositions to be added and ease of use, the polyurethane powder may further include organic/inorganic particles such as silica or polymethylsilsesquioxane within a content range that does not affect the properties of the polyurethane powder.

In addition, commercially available polyurethane powders may be used as the polyurethane powder of the present invention. For example, the polyurethane powder may include D-<NUM> (Toshiki Co. ), EPU-2X (hexamethylene diisocyanate/trimethylol hexyllactone crosspolymer & polymethyl methacrylate, silica, SUNJIN BEAUTY SCIENCE Co. ), and KSP-<NUM> (SHINETSU Co. ), without being limited thereto.

The polyurethane powder may have a weight average molecular weight of <NUM>,<NUM> to <NUM>,<NUM>, preferably <NUM>,<NUM> to <NUM>,<NUM>. Within this range, a coloring material having a reflectance of <NUM> or more, high value and chroma, and fluorescence expression properties may be provided.

In addition, the polyurethane powder may have an average particle diameter of <NUM> to <NUM>, preferably <NUM> to <NUM>. Within this range, a coloring material having a reflectance of <NUM> or more and fluorescence expression properties may be provided.

The polyamide powder has a weight average molecular weight of <NUM>,<NUM> or more. When the molecular weight of the polyamide powder is less than <NUM>,<NUM>, reflectance may be lowered when the polyamide powder is reacted with the water-soluble dye of the present invention. In addition, since the polyamide powder has a high molecular weight of <NUM>,<NUM> or more, the polyamide powder has low oil absorption ability, thereby weakening the thickening effect of a composition. In addition, when the polyamide powder is included in a cosmetic composition, the gloss of a cosmetic may be improved. In addition, since a coloring material having a high molecular weight may be used, manufacture of cosmetics may be easily controlled, and the manufacturing process including dispersion may be easily performed.

As the polyamide powder, nylon powders may be used. For example, the polyamide powder may include one or more selected from the group consisting of nylon-<NUM>, nylon-<NUM>, nylon-<NUM>, nylon-<NUM>, and copolymers thereof. When the condition of weight average molecular weight is satisfied, the type of nylon is not limited. For example, the copolymer may be a copolymer of nylon-<NUM> and nylon-<NUM>, without being limited thereto.

Preferably, the coloring material used in the cosmetic composition for lips of the present invention includes the water-soluble dye; and the polyurethane powder. Since the coloring material including the water-soluble dye and the polyurethane powder has a very high reflectance, when the coloring material is included in cosmetics, color expression properties may be further improved, and cosmetics having fluorescence properties may be provided.

Preferably, the coloring material used in the cosmetic composition for lips of the present invention includes the water-soluble dye; and the polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more. The coloring material including the water-soluble dye and the polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more has low oil absorption ability, thereby weakening the thickening effect of a composition. Thus, when the coloring material is included in cosmetics, gloss of the cosmetics may be improved.

Preferably, in the coloring material used in the cosmetic composition for lips of the present invention, the powder is preferably included in an amount of <NUM> to <NUM> % by weight, more preferably <NUM> to <NUM> % by weight, most preferably <NUM> to <NUM> % by weight, based on total weight of the coloring material. When the powder is included in an amount of greater than <NUM> % by weight, the intensity of the color tone of the coloring material may be relatively reduced. When the powder is included in an amount of less than <NUM> % by weight, it is difficult to use the coloring material in a makeup cosmetic composition of an anhydrous formulation, and the distinctiveness of a color tone may be degraded.

In the coloring material used in the cosmetic composition for lips of the present invention, the water-soluble dye is included in an amount of <NUM> to <NUM> % by weight, based on total weight of the coloring material. When the dye is included in amount of less than <NUM> % by weight, color development ability may be reduced. Thus, when a makeup cosmetic composition is prepared, it is difficult to use an appropriate amount. When the dye is included in an amount of greater than <NUM> % by weight, it is difficult to use the dye in anhydrous formulations. In addition, in terms of color tone, difference between the coloring material used in the cosmetic composition for lips of the present invention and conventional dyes may be reduced.

The coloring material used in the cosmetic composition for lips of the present invention has an advantage in that the coloring material broadens the spectrum of colors that may be used in cosmetic compositions. The present invention relates to a cosmetic composition for lips including the coloring material.

Preferably, the cosmetic composition for lips is a cosmetic composition of an anhydrous formulation. Since the coloring material used in the cosmetic composition for lips of the present invention has excellent reflectance and a property of expressing a fluorescent color, the cosmetic composition may have high value and chroma as compared to conventional lake colors. Accordingly, when the cosmetic composition including the coloring material is used to manufacture makeup products for mouth, or the like, the makeup products may have excellent color expression properties.

In the cosmetic composition for lips of the present invention, the coloring material is included in an amount of <NUM> to <NUM>% by weight.

In addition to the above-described components, the cosmetic composition for lips of the present invention may include one or more of oils and fats, moisturizers, softeners, surfactants, organic and inorganic pigments, organic powders, UV absorbers, preservatives, thickeners, disinfectants, antioxidants, plant extracts, pH adjusters, alcohols, colors, fragrances, blood flow stimulants, cool-absorbents, and waxes, which are commonly included in cosmetic compositions, without being limited thereto.

In particular, the cosmetic composition may further include one or more selected from the group consisting of waxes, oils, colors, and other additives.

As the wax, candelilla wax, carnauba wax, ceresin, paraffin, cocoa butter, polyethylenes, microcrystalline wax, ozocerite, beeswax, and synthetic wax may be used, without being limited thereto. In the composition of a cosmetic for lips according to the present invention, wax may be included in an amount of <NUM> to <NUM> % by weight, without being limited thereto.

As the oil component, mineral oils; animal oils such as squalene and lanoline; plant oils such as sunflower seed oil, avocado oil, jojoba oil, olive oil, and castor oil; and synthetic oils such as diphenylsiloxy phenyl trimethicone, isopropyl myristate, isopropyl palmitate, cetyl ethylhexanoate, cetyl myristate, polybutene, polyisobutene, hydrogenated polyisobutene, polyols, tri-<NUM>-ethylhexyl glycerin, triglyceride-based oils, octyldodecanol, and diisostearyl malate may be used, without being limited thereto.

In addition, in the present invention, the cosmetic composition for lips, may further include conditioning agents, oily raw materials, moisturizers, antioxidants, UV absorbers, preservatives, or fragrances within a range that does not affect the effect of the present invention.

The cosmetic composition for lips, may be subjected to processes such as heating, mixing, and stirring in accordance with common preparation methods to manufacture lipsticks, lip glosses, lip balms, or lip liners.

In addition, a method of manufacturing a cosmetic for lips is provided, the method including a step of preparing a coloring material by mixing one or more selected from the group consisting of a polyurethane powder and a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more and a water-soluble dye; and a step of adding the coloring material to a cosmetic composition.

The coloring material used in the cosmetic composition for lips of the present invention prepared by mixing one or more selected from the group consisting of a polyurethane powder and a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more and a water-soluble dye may exhibit excellent dispersibility even in anhydrous formulations. In particular, the coloring material may have excellent fluorescence properties that may not be achieved by conventional dyes. Thus, when the coloring material is used, cosmetics having a good color tone and excellent expression properties may be manufactured.

In the method of manufacturing a cosmetic for lips, when the polyamide powder has a weight average molecular weight of <NUM>,<NUM> or more, oil absorption ability may be lowered, thereby weakening the thickening effect of a composition. Thus, the gloss of the cosmetic for lips may be improved. In addition, due to ease of dispersion, cosmetic manufacturing efficiency may be improved.

Hereinafter, the present invention will be described in detail through preparation examples and experimental examples. The following preparation examples and experimental examples are only for illustration of the present invention, and the scope of the present invention is not limited thereto.

A water-soluble dye was dissolved in a solvent composed of purified water and ethanol. Nylon-<NUM> (ANYBES, average particle diameter: <NUM> to <NUM>, molecular weight: <NUM>,<NUM>, SH Energy Chemistry Co. , see Table <NUM>) as a polyamide-based powder; and a polyurethane-based HDI/trimethylol hexyllactone crosspolymer and silica (TOSHIKI Co. , plastic powder D-<NUM>, average particle diameter: <NUM> to <NUM>, molecular weight: <NUM>,<NUM> or more, see Table <NUM>) or silica (Sunjin Chemcal Co. , SUNSIL-<NUM>, average particle diameter: <NUM>, see Table <NUM>) were added to the solvent in which the water-soluble dye had been dissolved. Then, mixing reaction was performed while stirring the mixture at <NUM>,<NUM> rpm for <NUM> minutes using a Disper mixer. The mixing ratios of Pigment Red No. <NUM>-<NUM> or Pigment Red No. <NUM>-<NUM> as the water-soluble dye to the powder are shown in Table <NUM>. After mixing reaction, the solvent was evaporated to obtain a coloring material.

A coloring material including a dye (Pigment Red No. <NUM>) was prepared using nylon-<NUM> and a polyurethane-based powder or silica in the same manner as in Example <NUM>-<NUM> except that Pigment Red No. <NUM> was used as the water-soluble dye.

To evaluate the properties of the coloring material prepared according to Preparation Example <NUM>-<NUM>, color difference among the water-soluble dye (Pigment Red No. <NUM>-<NUM>) of Comparative Example <NUM>, the coloring material (a polyamide powder having a molecular weight of <NUM>,<NUM> + Pigment Red No. <NUM>-<NUM>) of Example <NUM>, and the coloring material (a polyurethane powder + Pigment Red No. <NUM>-<NUM>) of Example <NUM> was confirmed by visual observation. In the same manner, color difference among Comparative Example <NUM> (Pigment Red No. <NUM>-<NUM>), the coloring material (a polyamide powder having a molecular weight of <NUM>,<NUM> + Pigment Red No. <NUM>-<NUM>) of Example <NUM>, and the coloring material (a polyurethane powder + Pigment Red No. <NUM>-<NUM>) of Example <NUM> was confirmed. The obtained results are shown in <FIG>.

As shown in <FIG>, it can be seen that color difference between the coloring materials of Examples <NUM> to <NUM> of the present invention and the conventional water-soluble dye of Comparative Example <NUM> or <NUM> is significant, and in particular, a fluorescent color tone is observed only in the coloring materials of Examples <NUM> to <NUM> of the present invention.

In addition, the fluorescence of the coloring materials of Comparative Examples <NUM> and <NUM> and Examples <NUM> and <NUM> was analyzed using a time-resolved fluorescence spectrophotometer. Excitation was performed at <NUM> for each treatment, and light intensity was measured in the visible light region.

As a result, as shown in <FIG>, upon irradiation of light having a wavelength of <NUM>, the coloring materials of Examples <NUM> and <NUM> emitted light. On the other hand, in Comparative Examples <NUM> and <NUM>, no light other than light emitted from a light source was observed. Accordingly, it can be seen that, unlike Comparative Example <NUM> (Pigment Red No. <NUM>-<NUM>) or Comparative Example <NUM> (Pigment Red No. <NUM>-<NUM>), Examples <NUM> and <NUM> have the properties of a fluorescent coloring material that emits light after receiving light energy.

Light reflectance depending on wavelength may be measured, and, based on the results, the fluorescence color tone of a coloring material may be verified. Thus, the light reflectance of the dyes of Examples <NUM> to <NUM> and Comparative Examples <NUM> to <NUM> depending on wavelength was measured using a MINOLTA CM512M3 color-difference meter. Specifically, reflectance was measured at <NUM> or <NUM>, and the results are shown in Table <NUM>.

As a result, as shown in <FIG>, the conventional water-soluble dye according to Comparative Example <NUM> or <NUM> that was not modified with a powder exhibited a reflectance of less than <NUM> in all wavelengths, and the coloring material including silica according to Comparative Example <NUM> or <NUM> also exhibited a reflectance of less than <NUM>. Thus, it was confirmed that desired reflectance properties were not obtained in Comparative Examples. However, all of the coloring materials of Examples <NUM> to <NUM> exhibited a reflectance of <NUM> or more at a wavelength of <NUM> to <NUM>. These results indicated that, in the coloring materials of Examples <NUM> to <NUM>, the quantity of light reflected was greater than the quantity of light absorbed, and thus all of the coloring materials were fluorescent coloring materials. In particular, under the same conditions, the coloring material according to Example <NUM> or <NUM> that was modified with a polyurethane-based powder exhibited an increased reflectance as compared to the case of using a polyamide powder. In addition, when a lipstick was manufactured using the coloring material, the same tendency was observed.

In addition, as shown in Table <NUM> or <FIG>, the coloring material including Pigment Red No. <NUM> had a reflectance of less than <NUM> even though modification was performed in the same manner, and did not exhibit the properties of a fluorescent coloring material when confirmed by visual observation. Thus, it can be seen that, only for dyes having a structure that satisfies Structural Formula <NUM>, the properties of a fluorescent coloring material may be obtained through modification with the powder.

It was confirmed that the coloring materials of Examples <NUM> to <NUM> had the properties of a fluorescent coloring material. Based on this result, to confirm whether the coloring material might be used in an anhydrous formulation, lipsticks were manufactured using the coloring materials of Examples <NUM> and <NUM>. To compare color expression properties in products of anhydrous formulations, lipsticks were manufactured using lake colors, Red28 Lake and Red22 Lake for water-soluble dyes, Pigment Red No. <NUM>-<NUM> and Pigment Red No. <NUM>-<NUM>, respectively.

Wax and oil components shown in Table <NUM> were heated to melt the wax, and were mixed by stirring at <NUM>,<NUM> rpm for <NUM> minutes using a Disper mixer. Then, a color was added thereto, and additional stirring was performed at <NUM>,<NUM> rpm for <NUM> minutes using a Disper mixer. Then, the Disper mixer was removed, and the mixture was poured into a lipstick mold, followed by cooling to complete manufacture of a lipstick. As the polyurethane powder (HDI/trimethylol hexyllactone crosspolymer, silica), powder having the same conditions as in Preparation Example <NUM>-<NUM> was used.

As shown in <FIG> and <FIG>, when lipsticks manufactured in Comparative Examples <NUM> and <NUM>, in which conventional lake colors were used in anhydrous formulations, and lipsticks manufactured in Examples <NUM> and <NUM>, in which the coloring material of Example <NUM> or <NUM> of the present invention was used, were compared, color difference was observed by visual observation. In particular, in the cases of Comparative Examples <NUM> and <NUM>, although the cosmetic composition included an HDI/trimethylol hexyllactone crosspolymer and silica as the polyurethane powder, color difference was significant compared with the lipsticks of Examples <NUM> and <NUM>. These results indicate that the color expression properties of the surface-modified coloring material used in the cosmetic composition for lips of the present invention are not due to simple mixing of a polyamide or a polyurethane powder and a dye.

The kinds of dyes used in preparation of various cosmetic colors and the proportions of the dyes were changed to prepare a makeup cosmetic coloring material by five similar methods. In the same manner as above, a cosmetic composition according to Comparative Example (conventional lake color, marked as "Unmodified" in Table <NUM>) and a cosmetic composition according to Example (coloring material that was modified with a polyurethane powder according to Preparation Example <NUM>-<NUM>, marked as "Modified" in Table <NUM>) were prepared. In five conditions, the value and chroma of the compositions were compared. Table <NUM> below shows the values of a Munsell color system measured using a MINOLTA CM512M3 color-difference meter.

Claim 1:
A cosmetic composition for lips, comprising:
a wax, and a coloring material comprising:
one or more selected from the group consisting of a polyurethane powder and a polyamide powder having a weight average molecular weight of <NUM>,<NUM> or more; and
a water-soluble dye represented by Structural Formula <NUM> below
<CHM>
wherein R<NUM> is oxygen (O) or N(C<NUM>H<NUM>)<NUM>, wherein, when R<NUM> is oxygen, n is <NUM>, and when R<NUM> is N(C<NUM>H<NUM>)<NUM>, n is <NUM>;
R<NUM> and R<NUM> are each independently hydrogen, bromine (Br), or iodine (I);
R<NUM> is COO- or SO<NUM>-;
R<NUM> is hydrogen, chlorine, or SO<NUM>-, wherein, when R<NUM> is hydrogen or chlorine, m is <NUM>, and when R<NUM> is SO<NUM>-, m is <NUM>;
R<NUM> is hydrogen or chlorine; and
X is aluminum, calcium, sodium, or potassium;
wherein the water-soluble dye is included in an amount of <NUM> to <NUM>% by weight based on total weight of the coloring material, and
the coloring material is included in an amount of <NUM> to <NUM>% by weight based on total weight of the composition.