JP2008247867A - Cleansing agent for makeup cosmetics - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleansing agent for makeup cosmetics that has strong cleansing power and a good feeling of use and is free from the oily and sticky feeling after use. <P>SOLUTION: The cleansing agent for makeup cosmetics is a block copolymer or graft copolymer formed by combining a plurality of polymer sections having a lower critical solution temperature (LCST) of higher than 0°C and lower than 37°C with a hydrophilic polymer section, the cleansing agent for makeup cosmetics being characterized by containing a polymer compound of which the aqueous solution has a sol-gel transition temperature of higher than 0°C and lower than 37°C and water. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cleansing material for makeup cosmetics, and more specifically, contains an aqueous solution of a polymer compound having a specific sol-gel transition temperature, and has a good feeling without stickiness and an excellent cleansing power. The present invention relates to cleansing materials for makeup cosmetics.

  Cleansing agents are cosmetics used to remove sebum-derived stains and makeup cosmetics, and there are various types of formulations such as cleansing creams, cleansing lotions, cleansing gels, and cleansing oils.

  Recent makeup cosmetics are designed to make it difficult to break down makeup, and there are many products that are hard to fall off. Against this background, various ingenuity has been made in cleansing fees to remove it. (Patent Documents 1 to 4).

  In particular, in order to remove makeup cosmetics containing oily components, oil cleansings mainly composed of oils are widely used in consideration of familiarity with oily soils such as sebum and makeup cosmetics. However, this has a problem that the oily feeling and stickiness during use and after use are bad and the feeling of use is poor. Moreover, since the cleansing cream contains not only an oily component but also an aqueous component, there is a problem that the cleansing power is inferior to the cleansing oil although the oily feeling and stickiness during use and after use are not felt as the cleansing oil.

JP 2004-18451 A JP 2006-176470 A JP 2005-187355 A JP 2006-298866 A

  Therefore, an object of the present invention is to provide a cleansing material for makeup cosmetics that has good cleansing power and feeling of use, and that does not have oily feeling or stickiness after use.

  As a result of intensive studies to solve the above problems, the present inventors can solve the above problems by including an aqueous solution of a polymer compound having a specific sol-gel transition temperature in a cleansing material for makeup cosmetics. The present invention was completed.

  That is, the present invention is a block copolymer or graft copolymer in which a plurality of polymer parts having a lower critical solution temperature (LCST) higher than 0 ° C. and lower than 37 ° C. and a hydrophilic polymer part are combined, A cleansing material for makeup cosmetics, characterized in that the aqueous solution contains a polymer compound having a sol-gel transition temperature at a temperature higher than 0 ° C. and lower than 37 ° C. and water.

  The cleansing material for makeup cosmetics of the present invention is a process of a massage (cleansing) operation in which an aqueous solution of a polymer compound having a specific sol-gel transition temperature contained therein is adapted to the makeup cosmetic that is desired to be removed during use. Because it is gelled at body temperature on the skin, and it is removed from the skin in the form of a paste with elasticity or structure while containing makeup cosmetics, there is little friction stimulation and resistance to the skin, It has excellent cleansing power.

  In addition, the cleansing composition for makeup cosmetics of the present invention is blended in a normal cleansing composition in consideration of the familiarity (compatibility) with the oil component contained in the makeup cosmetics in order to express the cleansing effect. Therefore, it is excellent in that it has a refreshing feeling of use without oiliness and stickiness during use and after cleansing.

  In this specification, the lower critical solution temperature (LCST) means that a polymer is dissolved in water at a temperature lower than this temperature and becomes a transparent solution, but becomes insoluble at a temperature higher than this temperature. The temperature at which the solution becomes cloudy or precipitates and the phases are separated.

  The cleansing material for makeup cosmetics of the present invention (hereinafter referred to as “the cleansing material of the present invention”) is a block in which a plurality of polymer parts having an LCST higher than 0 ° C. and lower than 37 ° C. are combined with a hydrophilic polymer part A polymer or graft copolymer, the polymer solution of which an aqueous solution has a sol-gel transition temperature at a temperature higher than 0 ° C. and lower than 37 ° C. (hereinafter referred to as “temperature-responsive polymer compound”); Water is an essential component.

  The temperature-responsive polymer compound has an inherent sol-gel transition temperature in an aqueous solution, and is fluid sol at a temperature lower than the sol-gel transition temperature, but is higher than the sol-gel transition temperature. At temperature, it loses fluidity and gels. Such a temperature-responsive polymer compound is a known compound, and for example, is described as a polymer compound having a sol-gel transition temperature in Japanese Patent No. 3585309. The temperature-responsive polymer compound can also be produced in accordance with Examples 1 to 6 of this Japanese Patent No. 3585309 and other descriptions.

  The temperature-responsive polymer compound includes a plurality of polymer portions having an LCST higher than 0 ° C. and lower than 37 ° C. (hereinafter sometimes referred to as “LCST polymer portion”). The LCST polymer portion includes a temperature-responsive polymer that exhibits LCST behavior. Examples of the temperature-responsive polymer exhibiting this LCST behavior include poly N-substituted acrylamide derivatives, poly N-substituted methacrylamide derivatives and copolymers thereof, polypropylene oxide, copolymers of propylene oxide and other alkylene oxides, Examples thereof include polyvinyl methyl ether, polyvinyl alcohol partially acetylated product, and polyalkylene oxide. More specifically, poly-N-acryloylpiperidine, poly-Nn-propylmethacrylamide, poly-N-isopropylacrylamide, poly-N, N-diethylacrylamide, poly-N-isopropylmethacrylamide, poly-N -Cyclopropylacrylamide, poly-N-acryloylpyrrolidine, poly-N, N-ethylmethylacrylamide, poly-N-cyclopropylmethacrylamide, poly-N-ethylacrylamide, etc., and especially poly-N-isopropylacrylamide Preferably used.

  The LCST polymer portion may be a homopolymer composed only of the polymer having LCST, or may be a copolymer copolymerized with another monomer. As other monomers constituting such a copolymer, both hydrophilic monomers and hydrophobic monomers can be used.

  Examples of the hydrophilic monomer include N-vinylpyrrolidone, vinylpyridine, acrylamide, methacrylamide, N-methylacrylamide, hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxymethyl methacrylate, hydroxymethyl acrylate, and acrylic acid having an acidic group. Methacrylic acid and salts thereof, vinyl sulfonic acid, styrene sulfonic acid and the like, and N, N-dimethylaminoethyl methacrylate, N, N-diethylaminoethyl methacrylate, N, N-dimethylaminopropyl acrylamide having a basic group and Examples thereof include salts thereof.

  On the other hand, as the hydrophobic monomer, acrylate derivatives and methacrylate derivatives such as ethyl acrylate, methyl methacrylate, butyl methacrylate and glycidyl methacrylate, N-substituted alkylmethacrylamide derivatives such as Nn-butylmethacrylamide, vinyl chloride, acrylonitrile, Examples thereof include styrene and vinyl acetate.

  The LCST polymer portion constituting the temperature-responsive polymer compound has an LCST in a range higher than 0 ° C. and lower than 37 ° C. When the LCST polymer portion is a homopolymer, a polymer having an inherent LCST temperature in the range of 0 to 37 ° C. such as poly-N-isopropylacrylamide or poly-Nn-propylmethacrylamide is appropriately selected. be able to. On the other hand, when the LCST polymer portion is a copolymer, it is generally possible to increase the LCST of the copolymer by copolymerizing a hydrophilic monomer with a polymer having LCST, and to co-polymerize a hydrophobic monomer. Since the LCST can be lowered by polymerization, a combination of monomers to be copolymerized with a temperature-responsive polymer exhibiting LCST behavior is selected, and the composition ratio and the like are adjusted to 0 to 37 ° C. The LCST of the polymer portion can be adjusted within the range.

  The temperature-responsive polymer compound contains a hydrophilic polymer portion in addition to the LCST polymer portion. Examples of the polymer constituting this hydrophilic polymer portion include polyalkylene oxides such as methyl cellulose, dextran, polyethylene oxide, and polypropylene oxide, polyvinyl alcohol, poly N-vinyl pyrrolidone, polyvinyl pyridine, polyacrylamide, polymethacrylamide, Poly N-methylacrylamide, polyhydroxymethyl acrylate, polyacrylic acid, polymethacrylic acid, polyvinyl sulfonic acid, polystyrene sulfonic acid and their salts, poly N, N-dimethylaminoethyl methacrylate, poly N, N-diethylaminoethyl methacrylate, Examples thereof include poly N, N-dimethylaminopropyl acrylamide and salts thereof.

  Furthermore, the temperature-responsive polymer compound is a block copolymer or graft polymer in which the LCST polymer part and the hydrophilic polymer part are bonded. In the case of a graft polymer, even if the LCST polymer part is a main chain and the hydrophilic polymer part is bonded as a side chain, the main chain is a hydrophilic polymer part and the LCST polymer part is a side chain. It may be combined.

  The block copolymer of the above-mentioned LCST polymer part and hydrophilic polymer part, for example, introduces a plurality of reactive functional groups (hydroxyl group, carboxyl group, amino group, isocyanate group, etc.) in advance and chemistry of both. It can be obtained by bonding by reaction. For example, by introducing a methacryloyl group which is a polymerizable functional group into both ends of polyethylene oxide which is a hydrophilic polymer, and copolymerizing with N-isopropylacrylamide which is a monomer constituting a polymer having LCST, poly- A block copolymer of an LCST polymer portion composed of N-isopropylacrylamide and a hydrophilic polymer portion composed of polyethylene oxide can be obtained.

  Also, N-isopropylacrylamide and N-acryloxy succinimide are copolymerized to synthesize a polymer in which a group capable of reacting with a primary amine is introduced, and this is reacted with polyethylene oxide having a primary amino group introduced at the terminal. Thus, a block copolymer of an LCST polymer portion composed of poly-N-isopropylacrylamide and a hydrophilic polymer portion composed of polyethylene oxide can be obtained.

  In addition, the graft copolymer of the polymer part having the LCST and the hydrophilic polymer part may use a normal graft polymerization method, a method utilizing a chain transfer reaction of the polymer, and free to the backbone polymer. From the viewpoint of controlling the degree of polymerization of the side chain, a method of introducing a functional group capable of splitting into a group and starting polymerization from the functional group, a method of starting ionic polymerization from a trunk polymer, and the like can be used. Introducing one polymerizable functional group into the LCST polymer part and copolymerizing with a monomer that gives the hydrophilic polymer part, or introducing one polymerizable functional group into the hydrophilic polymer part A method of copolymerizing with a monomer constituting the LCST polymer portion is preferably used.

  The molecular weight of the temperature-responsive polymer compound is not particularly limited, but is preferably 10,000 or more, and particularly preferably 100,000 or more because a gel is favorably formed at a temperature higher than the sol-gel transition temperature. The molecular weight of the temperature-responsive polymer compound can be measured according to the method described in Japanese Patent No. 3585309.

  As described above, the sol-gel transition temperature of the aqueous solution of the temperature-responsive polymer compound is set to 0 depending on the composition of the LCST polymer part and the hydrophilic polymer part, the hydrophobicity and hydrophilicity of both polymer parts, the molecular weight, and the like. It can be prepared to have a temperature higher than 37 ° C. and lower than 37 ° C.

  In the cleansing composition of the present invention, the sol-gel transition temperature of the aqueous solution of the temperature-responsive polymer compound is such that the cleansing composition can be easily applied to the skin, and cleansing ( It may be set appropriately according to the temperature of the environment to be used so that the fluidity can be maintained during the massage operation, but the temperature is higher than 0 ° C. and lower than 37 ° C., preferably 15 ° C. or higher and lower than 37 ° C. And particularly preferably 25 ° C. or more and less than 37 ° C. If the sol-gel transition temperature of the aqueous solution of the temperature-responsive polymer compound is in the above temperature range, it is fluid at the time of application, and a massage (cleansing) operation is performed to blend in with the makeup cosmetic to be removed. After that, since it has gelation or structure, it has less frictional stimulus and resistance to the skin, and it can scrape off the makeup cosmetic makeup that has entered the concave portion of the skin and can exhibit excellent cleansing power. As an aqueous solution of a temperature-responsive polymer compound having a sol-gel transition temperature in the above temperature range, in addition to those prepared as described above, Mevigel-32 (sol-gel transition temperature 32 ° C.), Mevigel-20 Commercial products such as a sol-gel transition temperature of 20 ° C. (all manufactured by Ichimaru Falcos) can also be used. Mevigel-32 and 20 are 15 w / w% aqueous solutions of N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer. If these commercially available products are used, the sol-gel transition temperature of the aqueous solution of the temperature-responsive polymer compound can be adjusted to 20 ° C. or more and 32 ° C. or less.

  The content of the temperature-responsive polymer compound in the cleansing material of the present invention is 0.1 to 15% by mass (hereinafter simply referred to as “%”), preferably 1 to 15% in terms of solid content.

  The content of water, which is another essential component of the cleansing material of the present invention, is 10 to 99.9%, preferably 30 to 85%.

  The cleansing material of the present invention, in addition to the above essential components, is a powder containing components and granules that are usually used in preparations such as cosmetics, quasi-drugs, and external medicines, as long as the effects of the present invention are not impaired. , Surfactants, lower alcohols, polyhydric alcohols, water-soluble polymers other than the above temperature-responsive polymers, salts, pH adjusters, chelating agents, cooling agents, antibacterial agents, fragrances, moisturizers, plant extracts Beauty ingredients such as vitamins and amino acids can be blended. The cleansing material of the present invention is excellent in the cleansing power of a makeup cosmetic, preferably a makeup cosmetic containing an oily component, even if it does not contain an oil, so that it does not substantially contain an oil. It is preferable. By not containing an oil agent, compared to the conventional cleansing for makeup cosmetics that are difficult to remove, the oily feeling and stickiness after cleansing are much superior and the refreshing feel is excellent.

  Among the above ingredients, blending the granules further enhances the effect of removing dirt from makeup cosmetics that have entered pores and skin grooves, further improving the cleansing effect, and removing old keratin (scrub effect) ), A massage effect is obtained, which is preferable. The granule is not particularly limited, and its origin (natural or synthetic), production method, particle size, etc. are not particularly limited, but it acts as a core for removing dirt from makeup and sebum, Those that do not hurt are preferred. Examples of such granules include walnut shells, pulverized nuclides such as peach seeds, outer powders such as peanuts and sesame, protein powders such as casein, polysaccharide powders such as flour, chitin and chitosan, polyethylene powder, polystyrene Powder, nylon powder, crystalline cellulose, organically modified clay mineral, cross-linked sodium polyacrylate, sodium starch acrylate graft copolymer, pumice, magnesium aluminum silicate, silicic anhydride, laponite colloidal alumina, clay mineral, salt, Hydrous magnesium silicate, hydrous aluminum potassium silicate, hydrous aluminum silicate, and the like, and collapsible granules obtained by further granulating these, etc. are mentioned, and one or more kinds are appropriately selected according to the purpose and application be able to. Among the above-mentioned granules, disintegrating granules are powders that can be produced by a known granulation method using a binder. The disintegrating granules are present as granules during cleansing, but are easily disintegrated by a cleansing action that is applied on the hands or skin and blends with dirt when used. Among these granules, the cleansing material of the present invention preferably contains granules selected from pulverized plant seeds and powders, polyethylene powder, crystalline cellulose, and disintegrable granules. In addition, the particle size of the granule is not particularly limited as long as it has a size that does not feel pain during use and can enhance the function of scraping off makeup makeup that has entered pores and skin grooves, but the average The particle size is preferably 10 μm or more and 500 μm or less, and more preferably 50 μm or more and 300 μm or less. The blending amount of these granules in the cleansing material of the present invention is preferably 0.5 to 20%, more preferably 1 to 10%.

  In addition, it is preferable to add a surfactant among the above components because the cleansing effect of oily dirt is improved. Although it does not specifically limit as said surfactant, The nonionic surfactant and anionic surfactant which use polyoxyalkylene as a hydrophilic group are preferable. Examples of such surfactants include polyoxyethylene fatty acid ether, polyoxyethylene glyceryl ether fatty acid ester, sucrose fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene hydrogenated castor oil fatty acid ester, polyoxyethylene palm An oil fatty acid salt etc. are mentioned. The blending amount of the surfactant in the cleansing material of the present invention is 0.01 to 20%, more preferably 0.1 to 10%. If it is this range, the refreshing feeling which is one of the effects of this invention is obtained, without feeling the oil feeling and stickiness like the oil cleansing normally used for the cleansing of the makeup cosmetics containing an oil component. It is easier to remove oily stains.

  The cleansing material of the present invention comprises the above essential components at a temperature lower than the sol-gel transition temperature of the aqueous solution of the temperature-responsive polymer compound used in the cleansing material of the present invention, that is, the aqueous solution of the temperature-responsive polymer compound. It is produced by mixing in a sol state showing fluidity. In addition, when blending an oil agent or lipophilic component that needs to be heated and dissolved in the cleansing material of the present invention, after warming and mixing components other than the aqueous solution of the temperature-responsive polymer compound used in the cleansing material of the present invention Alternatively, the water-based component and the oil-based component other than the aqueous solution of the temperature-responsive polymer compound used in the cleansing material of the present invention are each dissolved by warming and then emulsified, and then from the sol-gel transition temperature of the temperature-responsive polymer compound After cooling to a low temperature, it is produced by mixing with an aqueous solution of a temperature-responsive polymer compound.

  The cleansing composition of the present invention thus obtained is suitable for cleansing makeup cosmetics such as foundations, mascaras, lipsticks, and eye shadows, and preferably makeup cosmetics that are difficult to remove with only water or hot water.

  Moreover, the method of cleansing the makeup cosmetics apply | coated on skin using the cleansing material of this invention is as follows. Although the cleansing material of the present invention depends on the blending amount of the temperature-responsive polymer compound used in the cleansing material, it is gelled or structured by body temperature in the process of becoming familiar with the makeup cosmetics on the skin. Since it comes to have, it can be removed by curling up dirt as a resilient mass, wiping with a tissue as a gel-like substance containing dirt, or washing away.

  When the cleansing material after cleansing is washed away, if water or hot water having a temperature higher than the sol-gel transition temperature of the aqueous solution of the temperature-responsive polymer compound used in the cleansing material of the present invention is used, gelation is performed. It can be promoted and removed from the skin. In addition, if water or hot water having a temperature lower than the sol-gel transition temperature of the aqueous solution of the temperature-responsive polymer compound used in the cleansing material of the present invention is used, the cleansing material becomes sol and can be easily washed off. it can.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not restrict | limited to these Examples at all.

Example 1
Cleansing preparation:
The ingredients of the formulation shown in Table 1 below were uniformly mixed to prepare a cleansing material. Moreover, the cleansing effect of the oily soil of the obtained cleansing material was examined by the cleansing effect of the lipstick applied to the skin as described below. That is, first, the redness (a value) of the inner part of the forearm (2 cm × 4 cm) before lipstick application (a value) was measured with a spectrocolorimeter (manufactured by Minolta) (a value before lipstick application). Then, 1 g of each sample was taken in the area where the lipstick was applied, massaged with a constant force and speed for 15 seconds, and then washed away with hot water at 35 ° C. The same part after cleansing was measured with a color difference meter (lipstick application, a value after cleansing), the difference (Δa) was calculated, and the cleansing effect was evaluated. A small Δa indicates that the cleansing effect of oily dirt is high. The results are also shown in Table 1.

表中、（ ）内の数値は固形分量
＊１：Ｎ−イソプロピルアクリルアミド・メタクリル酸ｎ−ブチル・ポリ（２〜２０）ア
ルキレン(Ｃ２〜３)グリコールジメタアクリレート共重合体水溶液（固形分１５％
、ゾル−ゲル転移温度２０℃）（一丸ファルコス社製）

In the table, the values in parentheses are solid contents * 1: N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer aqueous solution (solid content 15 %
Sol-gel transition temperature 20 ° C) (Ichimaru Falcos)

<Evaluation lipstick prescription>
(Ingredient) (%)
(1) Polyethylene wax 16
(2) Glyceryl tri-2-ethylhexanoate Residual amount (3) Dimethylpolysiloxane (6CS) 5
(4) Decamethylcyclopentasiloxane 20
(5) Trimethylsiloxysilicic acid 10
(6) Diisostearyl malate 15
(7) Red No. 202 0.2
(8) Haze-like silicic anhydride 2
<Evaluation lipstick manufacturing method>
A: Components (1) to (6) are dissolved by heating, and components (7) and (8) are added and mixed uniformly.
B: A was dissolved at 90 ° C., poured into a predetermined container, cooled to room temperature, and made into a stick-shaped lipstick.

  From the results shown in Table 1, it was found that the product 1 of the present invention had the same amount of the water-soluble polymer as the comparative products 1 and 2, but the value of Δa was small and the cleansing power was high.

Example 2
Cleansing preparation:
The ingredients of the formulation shown in Table 2 below were uniformly mixed to prepare a cleansing material.

表中、（ ）内の数値は固形分量
＊１：Ｎ−イソプロピルアクリルアミド・メタクリル酸ｎ−ブチル・ポリ（２〜２０）ア
ルキレン(Ｃ２〜３)グリコールジメタアクリレート共重合体水溶液（固形分１５％
、ゾル−ゲル転移温度３２℃）（一丸ファルコス社製）

In the table, the values in parentheses are solid contents * 1: N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer aqueous solution (solid content 15 %
Sol-gel transition temperature 32 ° C) (Ichimaru Falcos)

Example 3
Cleansing gel preparation:
Cleansing gels were prepared by uniformly mixing the ingredients of the formulation described in Table 3 below.

表中、（ ）内の数値は固形分量
＊１：Ｎ−イソプロピルアクリルアミド・メタクリル酸ｎ−ブチル・ポリ（２〜２０）ア
ルキレン(Ｃ２〜３)グリコールジメタアクリレート共重合体水溶液（固形分１５％
、ゾル−ゲル転移温度２０℃）（一丸ファルコス社製）
＊２：Ｎ−イソプロピルアクリルアミド・メタクリル酸ｎ−ブチル・ポリ（２〜２０）ア
ルキレン(Ｃ２〜３)グリコールジメタアクリレート共重合体水溶液（固形分１５％
、ゾル−ゲル転移温度３２℃）（一丸ファルコス社製）

In the table, the values in parentheses are solid contents * 1: N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer aqueous solution (solid content 15 %
Sol-gel transition temperature 20 ° C) (Ichimaru Falcos)
* 2: N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer aqueous solution (solid content 15%
Sol-gel transition temperature 32 ° C) (Ichimaru Falcos)

Example 4
Cleansing gel preparation:
Cleansing gels were prepared by uniformly mixing the ingredients of the formulations listed in Table 4 below. The resulting cleansing gel was tested for oily soil cleansing effect as follows. In other words, 20 females in their 20s and 30s used the lipstick used in Example 1, and after 30 minutes of lipstick application, using the cleansing gels of the product and comparative product for 15 seconds at a constant force and speed. The lips were massaged, blended with lipstick, cleansed and washed with water. The ease of massage, cleansing power, and non-stickiness after washing were evaluated in five stages, and the average score was determined according to the following criteria.

表中、（ ）内の数値は固形分量
＊１：Ｎ−イソプロピルアクリルアミド・メタクリル酸ｎ−ブチル・ポリ（２〜２０）ア
ルキレン(Ｃ２〜３)グリコールジメタアクリレート共重合体水溶液（固形分１５％
、ゾル−ゲル転移温度３２℃）（一丸ファルコス社製）

In the table, the values in parentheses are solid contents * 1: N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer aqueous solution (solid content 15 %
Sol-gel transition temperature 32 ° C) (Ichimaru Falcos)

<Evaluation criteria>
Evaluation Content 5 points Very good 4 points
3 points
Normal 2 points
Slightly bad 1 point
bad

<Criteria>
Judgment Details ◎ Average score is 4.5 or more ○ Average score is 3.5 or more and less than 4.5 △ Average score is 2.5 or more and less than 3.5 × Average score is less than 2.5

  The cleansing gels of the products 4 and 5 of the present invention are easy to cleanse (massage) to familiarize lipstick stains, gradually feel a feeling of elasticity, and do not rub excessively on the lips. Even the dirt on the lipstick that had entered it was removed so that it could be held well, and the lips after washing were not sticky and a refreshing feeling was obtained. On the other hand, the comparative products 3 to 6 are not all satisfactory, and the comparative products 4 to 6 using other water-soluble polymers in place of the temperature-responsive polymer compound used in the present invention are particularly effective in cleansing power. Chipping and stickiness remained after washing with water.

Example 5
Cleansing gel preparation:
Cleansing gels were prepared by uniformly mixing the ingredients of the formulation described in Table 5 below. The oil clean stain cleansing effect of the obtained cleansing gel was tested as follows. That is, first, 20 females in their 20s and 30s were applied to the entire face with a water-in-oil foundation prepared by the following formulation and manufacturing method. After 30 minutes of application, the facial cleansing gel of the present invention and the comparative product was used, and the face was massaged with a constant force and speed for 30 seconds, and then rinsed with water. And the ease of the massage in that case, the cleansing power, and the non-stickiness after washing were determined in the same manner as in Example 4.

表中、（ ）内の数値は固形分量
＊１：Ｎ−イソプロピルアクリルアミド・メタクリル酸ｎ−ブチル・ポリ（２〜２０）ア
ルキレン(Ｃ２〜３)グリコールジメタアクリレート共重合体水溶液（固形分１５％
、ゾル−ゲル転移温度３２℃）（一丸ファルコス社製）

In the table, the values in parentheses are solid contents * 1: N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer aqueous solution (solid content 15 %
Sol-gel transition temperature 32 ° C) (Ichimaru Falcos)

<Evaluation of water-in-oil foundation formulation>
(Ingredient) (%)
(1) Polyethylene wax 1
(2) Ethylene propylene copolymer 1
(3) Diglyceryl triisostearate 18
(4) Decamethylcyclopentasiloxane 15
(5) Methylpolysiloxane / cetylmethylpolysiloxane / poly3
(Oxyethylene / oxypropylene) methylpolysiloxane copolymer
(6) Sorbitan sesquioleate 1
(7) Titanium oxide 3
(8) Bengala 1
(9) Talc 3
(10) Purified water remaining amount (11) 1,3-butylene glycol 5
<Evaluation method for water-in-oil foundation>
A: Components (1) to (6) are dissolved by heating.
B: Components (7) to (9) are added to A and mixed uniformly.
C: Components (10) and (11) are mixed uniformly.
D: C is added to B and emulsified.
E: D was dissolved at 80 ° C., poured into a metal pan, cooled to room temperature, and a water-in-oil foundation was obtained.

  The cleansing gels of the products 6 and 7 of the present invention are easy to perform a cleansing operation (massage) to familiarize dirt of a water-in-oil foundation, and gradually feel a feeling of elasticity, but do not rub the face excessively, The powder foundation that had entered the wrinkles of the face, etc., was removed so that it was well held, and the face after washing was not sticky and a refreshing feeling of use was obtained. On the other hand, comparative products 7 to 10 are not all satisfactory, and in particular, comparative products 8 to 10 using other polymers instead of the temperature-responsive polymer compound used in the present invention lack cleansing power. It was sticky after washing with water.

Example 6
Preparation of cleansing gel with granules:
The ingredients of the formulation shown in Table 6 below were uniformly mixed to prepare a cleansing gel containing granules.

表中、（ ）内の数値は固形分量
＊１：Ｎ−イソプロピルアクリルアミド・メタクリル酸ｎ−ブチル・ポリ（２〜２０）ア
ルキレン(Ｃ２〜３)グリコールジメタアクリレート共重合体水溶液（固形分１５％
、ゾル−ゲル転移温度３２℃）（一丸ファルコス社製）
＊２：一丸ファルコス社製（ＷＮグリット８０−１２０）

In the table, the values in parentheses are solid contents * 1: N-isopropylacrylamide / n-butyl methacrylate / poly (2-20) alkylene (C2-3) glycol dimethacrylate copolymer aqueous solution (solid content 15 %
Sol-gel transition temperature 32 ° C) (Ichimaru Falcos)
* 2: Made by Ichimaru Falcos (WN Grit 80-120)

  The cleansing gel containing granules of the product 8 of the present invention has no frictional stimulus to the skin, is easy to cleanse (massage) to familiarize dirt, and cleans up dirt on pores, wrinkles and other skin recesses. It was made, and the skin after washing was not sticky and a refreshing feeling was obtained.

  The cleansing composition for make-up cosmetics of the present invention is excellent in cleansing power with a good feeling of use without frictional stimulation and resistance to the skin, and has no oily feeling or stickiness after use.

Therefore, the cleansing composition for makeup cosmetics of the present invention is suitable for cleansing makeup cosmetics such as foundations, mascaras, lipsticks, and eye shadows, preferably makeup cosmetics that are difficult to remove with only water or hot water.

more than

Claims (3)

  A block copolymer or graft copolymer in which a plurality of polymer parts having a lower critical solution temperature (LCST) higher than 0 ° C. and lower than 37 ° C. and a hydrophilic polymer part are bonded, and the aqueous solution is from 0 ° C. A cleansing material for makeup cosmetics, comprising a polymer compound having a sol-gel transition temperature at a temperature higher than 37 ° C. and water.   The cleansing material for makeup cosmetics according to claim 1, which is substantially free of oil. The cleansing material for makeup cosmetics according to claim 1 or 2, further comprising granules.