JP2007269713A - Cosmetic for makeup or antisunburn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil in water type emulsion cosmetic of good abrasion resistance that gives fresh, good feeling of use and endures even at such a high temperature as to cause perspiration. <P>SOLUTION: The cosmetic for makeup or antisunburn is prepared by mixing an aqueous solution of a temperature-sensitive polymer that has characteristics of reversible sol-gel transition, that is, of forming a sol at a lower temperature than the critical temperature ranging from 10°C to 40°C and a hydrogel at the critical temperature or higher and can form a film, at a lower temperature than the sol-gel transition temperature of the temperature-sensitive polymer. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cosmetic for make-up or sunscreen that has a fresh and excellent feeling of use, has a good long-lasting makeup even at high temperatures such as sweat, and has excellent friction resistance. More specifically, it is used for makeup or sunscreen obtained by mixing an aqueous solution of a temperature-sensitive polymer that exhibits a sol-gel transition at the transition temperature and can form a film under conditions lower than the transition temperature. Related to cosmetics.

  Conventionally, cosmetics such as water-based white powder, oil-in-water liquid foundations, sunscreen cosmetics, etc. have a large amount of moisture and have a very fresh feel. Is a preferable formulation. Recently, many oil-in-water makeup cosmetics and oil-in-water sunscreen emulsified cosmetics that are particularly excellent in use feeling have been proposed. However, the ratio of the hydrophilic substance in the prescription system is large, and it generally has a drawback that the makeup durability such as water resistance and sweat resistance is inferior. Therefore, a preparation that can fully exhibit the characteristics of the cosmetic is not yet found on the market. In addition, the retention of the compounding component on the skin is low, and when a cosmetic such as a liquid foundation is used, the so-called color transfer phenomenon is likely to occur because the clothing surface comes into contact with the makeup surface. .

  Water-in-oil preparations that use many oils such as silicone oil and have excellent water resistance and sweat resistance have been widely used as means for enhancing the longevity of preparations (see, for example, Patent Documents 1 and 2). Furthermore, in water-in-oil preparations, in recent years, it has become possible to dramatically improve the friction resistance and solve the color transfer phenomenon by blending a film-forming component such as a resin. However, these water-in-oil preparations have poor skin feel at the time of application, and therefore are inferior in use feeling compared to oil-in-water cosmetics.

  On the other hand, an invention in which a temperature-sensitive polymer exhibiting sol-gel transition characteristics is applied as a cosmetic base is disclosed (Patent Document 3). The present invention focuses on the sol-gel transition property of temperature-sensitive polymers, and is used for cosmetics for external use, such as cosmetic packs and hair removal agents, which peel after the temperature-sensitive polymer gels on the skin. There is no suggestion of the use of temperature-sensitive polymers from the standpoint of makeup holding and friction resistance.

  From the above background, water-based or oil-in-water emulsified cosmetic type that solves color transfer phenomenon due to friction, etc. Cosmetics for make-up or sunscreen have been desired.

JP 2002-114663 A JP 2003-277248 A Japanese Patent Laid-Open No. 9-227329

  The present invention has been made in view of the above circumstances, has a fresh and excellent feeling of use, has a good makeup even under high temperatures such as sweat, and in addition has excellent friction resistance for tanning or tanning The purpose is to provide stop cosmetics.

In such a situation, as a result of earnest research, an aqueous cosmetic or water solution obtained by mixing an aqueous solution of a temperature-sensitive polymer exhibiting temperature-dependent sol-gel transition properties under conditions lower than the transition temperature. Oil-type emulsified cosmetics have excellent fluidity when stored, and after application on the skin, the temperature sensitive polymer can gel due to temperature rise due to body temperature, etc., and can form a cosmetic film as a strong film, which is excellent While maintaining the feeling of use, the present inventors have found that it is possible to solve the disadvantages of poor durability such as water resistance and sweat resistance, and furthermore, the color transfer phenomenon due to friction or the like can be solved.

  That is, the present invention is a sol at a temperature lower than the critical temperature in the range of 10 ° C. to 40 ° C., and forms a hydrogel at a temperature higher than the critical temperature. A makeup or sunscreen cosmetic characterized in that an aqueous solution of a possible temperature sensitive polymer is mixed and produced under conditions lower than the sol-gel transition temperature of the temperature sensitive polymer.

  The second invention of the present application lies in the above cosmetic for make-up or sunscreen, wherein glycerin is further blended.

  The cosmetic of the present invention is a sol at a temperature lower than the critical temperature in the range of 10 ° C. to 40 ° C., and forms a hydrogel at a temperature higher than the critical temperature, and exhibits a reversible sol-gel transition property. It contains a temperature-sensitive polymer that can be formed, has high fluidity when stored at a temperature lower than the transition temperature, has excellent operability, and has a fresh and excellent feeling of use. Since the temperature-sensitive polymer gels to form a strong decorative film, the makeup lasts well even at high temperatures such as sweat, and in addition, it has excellent friction resistance.

  Hereinafter, the present invention will be described in detail. In the present invention, it is a sol at a temperature lower than the critical temperature in the range of 10 ° C. to 40 ° C., forms a hydrogel at a temperature higher than the critical temperature, exhibits a reversible sol-gel transition characteristic, and can form a film. Such a temperature-sensitive polymer is used as an essential component constituting the cosmetic of the present invention. Examples of such temperature-sensitive polymers include substances described in the literature (supervised by Mitsuhiro Shibayama and Satoshi Sugawara, “Latest Trends in Polymer Gels”, CMC Publishing Co., Ltd., issued April 2004, page 7) and A structure is illustrated. That is, when the temperature of a block polymer aqueous solution composed of a temperature-responsive polymer and a hydrophilic polymer is raised, it quickly gels at the phase-separation temperature of the temperature-responsive polymer, and when the temperature is returned below the phase-separation temperature, the original solution state is instantly obtained. It is shown that a characteristic returning to is obtained. The term “phase separation temperature” as used herein is defined as a phenomenon in which when a certain type of polymer (polymer) reaches a certain critical temperature or higher, it rapidly undergoes dehydration and aggregates and insolubilizes due to hydrophobic interaction. Poly N-isopropylacrylamide (PNIPAM) is famous as a temperature-responsive polymer exhibiting such “phase separation characteristics”. A polymer compound obtained by bonding a temperature-responsive polymer part (block) and a hydrophilic polymer part is preferable for carrying out the present invention, and one molecule of the temperature-responsive polymer part is further provided. More preferably, it is a polymer compound present in plural.

  In the present invention, the temperature-sensitive polymer needs to exhibit a temperature-dependent sol-gel transition characteristic, and its critical temperature is in the range of 10 ° C to 40 ° C, preferably in the range of 15 ° C to 35 ° C. It is. This temperature-dependent sol-gel transition characteristic can be obtained by measuring dynamic viscoelasticity using a rotary rheometer. As the measurement conditions, for example, the sample is measured by changing the dynamic elastic modulus of the sample at an observation frequency of 1 Hz from a low temperature to a high temperature, and the storage elastic modulus (G ′, elastic term) of the sample is the loss elastic modulus (G ″). The temperature above the viscosity term) is defined as the sol-gel transition temperature. In general, the state of G ″> G ′ is defined as sol, and the state of G ″ <G ′ is defined as gel. In measuring the sol-gel transition temperature, the following measurement conditions can be preferably used.

(Conditions for sol-gel transition temperature measurement method)
Measuring instrument: Rotational rheometer Physica MCR-301 (manufactured by Anton Paar)
Concentration of temperature sensitive polymer aqueous solution: 10% by mass
Measurement cell shape and dimensions: 25mm diameter parallel plate, 1mm gap
Applicable stress or strain: Within the linear range Applied frequency: 1 Hz
Temperature increase rate: 1 ° C / min

  The above-mentioned “polymer compound having a sol-gel transition temperature” is a gel (hydrogel) having poor fluidity when the aqueous solution or aqueous dispersion is higher than the sol-gel transition temperature. It has the property of becoming a sol (or liquid) at low temperatures.

  In the present invention, a polymer compound having a suitable sol-gel transition temperature is selected from the various polymer compounds (having the general properties described above) that can be used as a gel-forming component in ordinary cosmetics. It can be easily selected according to the method (sol-gel transition temperature measurement method).

  As the compound of the temperature-responsive polymer part in the temperature-sensitive polymer used in the present invention, particularly preferred examples include poly N-substituted acrylamide derivatives, poly N-substituted methacrylamide derivatives, and copolymers thereof; Polypropylene oxide, copolymer of propylene oxide and other alkylene oxides; polyvinyl methyl ether, polyvinyl alcohol partially acetylated product, polyalkylene oxide, and the like. The above polymer may be a homopolymer or a copolymer of a monomer constituting the polymer and another monomer. As the other monomer constituting such a copolymer, either a hydrophilic monomer or a hydrophobic monomer can be used.

  Examples of the hydrophilic monomer include N-vinyl pyrrolidone, vinyl pyridine, acrylamide, methacrylamide, N-methyl acrylamide, hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxymethyl methacrylate, hydroxymethyl acrylate, and acrylic having an acid group. Acid, 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-dimethylaminopropylacrylamide having a basic group And 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, Examples include acrylonitrile, styrene, and vinyl acetate.

  As a particularly preferred component, the compound of the temperature-responsive polymer portion is a polypropylene oxide, a copolymer of propylene oxide and another alkylene oxide; polyvinyl methyl ether, polyvinyl alcohol partial acetylated product; or poly-N-acryloylpiperidine, Poly-Nn-propyl methacrylamide, poly-N-isopropyl acrylamide, poly-N, N-diethyl acrylamide, poly-N-isopropyl methacrylamide, poly-N-cyclopropyl acrylamide, poly-N-acryloylpyrrolidine, poly A homopolymer or copolymer of -N, N-ethylmethylacrylamide, poly-N-cyclopropylmethacrylamide, or poly-N-ethylacrylamide may be mentioned.

  On the other hand, as the hydrophilic polymer compound to be bonded to the temperature-responsive polymer in the present invention, for example, methyl cellulose, dextran, polyethylene 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, poly N, N-dimethylaminopropyl acrylamide and salts thereof may be mentioned.

  The content of the temperature-sensitive polymer compound used in the present invention is not particularly limited as long as it is within a concentration range in which sol-gel transition substantially occurs, but usually 0.5 to 50 on the basis of the total amount of cosmetics. The range of 0.0% by mass (hereinafter abbreviated as%) is preferable, and 2.0 to 20.0% is particularly preferable. If it is less than 0.5%, gel formation is poor and it may be difficult to obtain a gel strength that exhibits the effects of the present invention. If it exceeds 50.0%, swelling in water is suppressed, and long-term storage stability is difficult. There may be.

  In the present invention, glycerin can be further used in combination. The content of glycerin used in the present invention is usually preferably 50.0% or less, particularly preferably 0.1 to 20.0%, based on the total amount of cosmetics. When mix | blending exceeding 50.0%, the swelling property to the water of hydrogel is suppressed and long-term storage stability may be difficult.

  The cosmetic of the present invention comprises the above-described components as essential constituents, but the composition for makeup or sunscreen according to the present invention is prepared within a range that does not impair the object of the present invention. Other necessary components such as anionic surfactant, amphoteric surfactant, nonionic surfactant, sticky agent, oil agent, UV scattering agent, UV absorber, powder (dye, resin, pigment) ), Preservatives, fragrances, moisturizers, physiologically active ingredients, salts, solvents, antioxidants, chelating agents, pearling agents, neutralizing agents, pH adjusters, insect repellents, enzymes, etc. Can do. Specific examples of other blending components are shown below, but are not limited thereto.

  Examples of the anionic surfactant include linear or branched fatty acid salts, α-acyl sulfonates, alkyl sulfonates, alkyl allyl sulfonates, alkyl naphthalene sulfonates, alkyl sulfates, alkyl ether sulfates, Alkylamide sulfate, polyoxyethylene alkyl ether sulfate, polyoxyethylene alkylamide ether sulfate, alkyl phosphate, alkylamide phosphate, alkyloylalkyl taurine salt, N-acyl amino acid salt, sulfosuccinate, Examples thereof include fluoroalkyl phosphate esters.

  Examples of amphoteric surfactants include glycine type, aminopropionic acid type, carboxybetaine type, sulfobetaine type, sulfonic acid type, sulfuric acid type, and phosphoric acid type.

  Nonionic surfactants include fatty acid alkanolamide, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene alkyl ether, polyoxyethylene alkyl ester, sucrose fatty acid ester, polyglycerin fatty acid ester, alkyl An amine oxide etc. are mentioned.

Examples of the oil agent include volatile and non-volatile oil agents usually used in cosmetics, solvents or resins other than the above resins, and liquids, pastes, and solids at room temperature may be used, but liquids excellent in handling are preferable. . Examples of oils include higher alcohols such as cetyl alcohol, isostearyl alcohol, lauryl alcohol, hexadecyl alcohol, octyldodecanol, fatty acids such as isostearic acid, undecylenic acid, oleic acid, myristyl myristate, hexyl laurate, olein Decyl acid, isopropyl myristate, hexyl decyl dimethyloctanoate, glyceryl monostearate, diethyl phthalate, ethylene glycol monostearate, octyl oxystearate, hydrocarbons such as liquid paraffin, petrolatum, squalane, lanolin, Oils such as reduced lanolin, wax such as carnauba wax, mink oil, cacao butter, palm oil, palm kernel oil, camellia oil, sesame oil, castor oil, olive oil, ethylene, α-olefin, koo Goma, and the like.

  Other forms of oil include, for example, dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, polyether-modified organopolysiloxane, fluoroalkyl / polyoxyalkylene co-modified organopolysiloxane, and alkyl-modified organopolysiloxane. , Dimethiconol, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, amodimethicone, silicone gel, acrylic silicone, trimethylsiloxysilicic acid, silicone RTV rubber and other silicone compounds, perfluoropolyether, fluorinated pitch, fluorocarbon, fluoroalcohol, etc. The fluorine compound is mentioned.

  As the adhesive, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, polyacrylic amide, gum arabic, alginic acid or its salt, carrageenan, agar, guar gum, quince seed, tamarind gum, dextrin, dextran, starch, locust bean gum, Examples include Karaya gum, tragacanth gum, pectin, quince, chitosan, xanthan gum, gellan gum, hyaluronic acid or salts thereof, pullulan, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, and cationized cellulose.

  The ultraviolet absorber is selected from conventionally known cosmetic raw materials having ultraviolet absorbing ability. Specifically, benzyl paramethoxycinnamate, 2-ethylhexyl paramethoxycinnamate, 2-ethoxyethyl paramethoxycinnamate, glyceryl mono-2-ethylhexanoate diparamethoxycinnamate, paramethoxycinnamate Cinnamic acid UV absorbers such as isopropyl and diisopropyl cinnamate esters, hydroxymethoxybenzophenone, hydroxymethoxybenzophenonesulfonic acid, sodium hydroxymethoxybenzophenonesulfonate, dihydroxymethoxybenzophenone, dihydroxymethoxybenzophenone sodium disulfonate, dihydroxy Benzophenone-based UV absorbers such as benzophenone and tetrahydroxybenzidiphenone, paraaminobenzoic acid, ethyl paraaminobenzoate, glyceryl paraaminobenzoate, Benzoic acid ester UV absorbers such as amyl dimethylaminobenzoate, octyl paradimethylaminobenzoate, ethyl 4- [N, N-di (2-hydroxypropyl) amino] benzoate, ethylene glycol salicylate, phenyl salicylate, salicylic acid Salicylic acid UV absorbers such as octyl, benzyl salicylate, p-tert-butylphenyl salicylate, homomenthyl salicylate, 2,4,6-trianilino-p- (carbo-2'-ethylhexyl-1'-oxy) -1,3 , 5-triazine, triazine ultraviolet absorbers, 4-tert-butyl-4′-methoxydibenzoylmethane, oxybenzone, menthyl anthranilate, 2- (2-hydroxy-5-methylphenyl) benzotriazole, dimethoxybenzylidenedio Ki Imidazolidine-propionic acid 2-ethylhexyl, may be mentioned 2-phenylbenzimidazole-5-sulfonic acid and the like, may be used in combination of one or more.

Examples of the ultraviolet scattering agent include metal oxides such as titanium oxide, zinc oxide, cerium oxide, and zirconia oxide. Among these, the average primary particle diameter is particularly preferably selected from one or more fine metal oxides in the range of 5 to 100 nm. These metal oxides are preferably subjected to conventionally known surface treatments such as fluorine compound treatment (perfluoroalkyl phosphate treatment, perfluoroalkylsilane treatment, perfluoropolyether treatment, fluorosilicone treatment, and fluorinated silicone resin treatment. ), Silicone treatment (methylhydrogenpolysiloxane treatment, dimethylpolysiloxane treatment, vapor phase tetramethyltetrahydrogencyclotetrasiloxane treatment is preferred), silicone resin treatment (trimethylsiloxysilicate treatment is preferred), pendant treatment (gas A method of adding an alkyl chain or the like after the phase method silicone treatment), silane coupling agent treatment, titanium coupling agent treatment, silane treatment (alkyl silane or alkylsilazane treatment is preferred), oil agent treatment, N-acylation treatment It is preferable that the surface treatment is carried out by an acid treatment, a polyacrylic acid treatment, a metal soap treatment (preferably stearic acid or myristic acid salt), an acrylic resin treatment, a metal oxide treatment or the like. It is preferable to use in combination. For example, the surface of fine particle titanium oxide is coated with a metal oxide such as silane or alumina, and then surface-treated with alkylsilane.

  Examples of powders include red No. 201, yellow No. 4, blue No. 1, black No. 401 and other dyes, yellow No. 4 Al lake, yellow No. 203 Ba lake and other lake dyes, nylon powder, silk powder and silicone powder. , Cellulose powder, silicone elastomer spherical powder, resin such as polyethylene powder, yellow iron oxide, red iron oxide, chromium oxide, carbon black, colored pigments such as ultramarine and bitumen, white pigments such as zinc oxide and titanium oxide, talc, Body pigments such as mica, sericite and kaolin, pigments such as pearl pigments such as titanium mica, metal salts such as barium sulfate, calcium carbonate, magnesium carbonate and magnesium silicate, inorganic powders such as silica and alumina, bentonite, smectite, Examples thereof include boron nitride. There are no particular limitations on the shape (spherical, rod-like, needle-like, plate-like, irregular shape, flake-like shape, spindle-like shape) and particle size of these powders.

  Examples of the physiologically active ingredient include substances that impart some physiological activity to the skin when applied to the skin. For example, anti-aging agent, squeeze agent, antioxidant, moisturizer, blood circulation promoter, antibacterial agent, bactericidal agent, desiccant, cooling agent, warming agent, vitamins, amino acids, wound healing promoter, irritation relieving agent , Analgesics, cell activators, enzyme components, and the like. In the present invention, one or more of these physiologically active ingredients can be blended.

  The cosmetic of the present invention can be produced by mixing under a temperature condition lower than the sol-gel transition temperature of the temperature sensitive polymer aqueous solution. For the production, those used in normal cosmetic production can be used without using special equipment. As a production method, if it is an aqueous cosmetic, it is obtained by a method in which other components are added to the temperature-sensitive polymer or its aqueous solution, and mixing is performed while swelling the temperature-sensitive polymer under a temperature condition lower than the sol-gel transition temperature. Can do. If it is an oil-in-water emulsified cosmetic, an oil-in-water emulsified cosmetic is first prepared from an oil phase and an aqueous phase that does not contain a temperature-sensitive polymer, and this is prepared under a temperature condition lower than the sol-gel transition temperature. -An oil phase and a temperature-sensitive polymer are contained by a method of adding and mixing a temperature-sensitive polymer or an aqueous solution thereof at a temperature lower than the gel transition temperature, or an emulsification method that does not perform heating, generally called a cold process. The target cosmetic can be obtained by a method of emulsifying the aqueous phase under a temperature condition lower than the sol-gel transition temperature, but is not limited to these methods. In the case of a low-viscosity aqueous cosmetic or emulsion, it may be easily mixed by processing under a temperature condition lower than the sol-gel transition temperature, but in a highly viscous cosmetic preparation such as a cream, the temperature When highly sensitive polymer or its aqueous solution is blended, it is preferable to mix the temperature sensitive polymer in a sol state at a temperature lower than the sol-gel transition temperature using mechanical force.

  The dosage form of the cosmetic of the present invention can be arbitrarily selected according to the purpose, and examples thereof include a lotion, cream, gel, emulsion, and aerosol. The cosmetics of the present invention are not limited to general cosmetics, but include quasi drugs, designated quasi drugs, topical drugs and the like.

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

Examples 1-4, Comparative Examples 1-3
Temperature sensitive oil-in-water emulsified cosmetics (cream teak) having the respective compositions shown in Table 1 were prepared. In addition, sensory evaluations (freshness, makeup finish, etc.) and cosmetic durability evaluation were performed on the cosmetics obtained in Examples and Comparative Examples. The evaluation method is shown below.

(sensory evaluation)
Evaluation items (feeling freshness, ease of application, good skin familiarity, makeup effect) regarding the feel during and after application when each sample was applied to the face by 20 expert panelists in the following five stages. The average score was evaluated, and 4.0 or higher was evaluated as ◎, 3.0 or higher and lower than 4.0 as ◯, 2.0 or higher and lower than 3.0 as Δ, and less than 2.0 as X.
5: Very favorable 4: Preferred 3: Neither 2: Unfavorable 1: Very unfavorable

(Makeup evaluation)
Furthermore, the makeup state was observed by a professional evaluator after 3 hours, and the makeup duration was evaluated in the following three stages.
○: The makeup lasts well and hardly changes.
(Triangle | delta): The makeup possession is normal and has collapsed a little.
X: The makeup lasting was bad and it collapsed easily.

  As can be seen from the results of sensory evaluation and cosmetic durability evaluation in Table 1, the cosmetics of Examples 1 to 4 prepared by mixing a temperature-sensitive polymer under conditions lower than the sol-gel transition temperature are good. In addition to a good feeling of use, it improved the longevity of makeup.

Example 5, Comparative Example 4
According to the formulation shown in Table 2, a temperature-sensitive oil-in-water emulsified cosmetic (liquid foundation) was prepared. The 10% temperature-sensitive polymer aqueous solution was added at 10 ° C. Makeup durability of prepared cosmetics. Evaluation was made by the following method.

(With makeup)
A professional evaluation panelist applied the cosmetics of Example 5 and Comparative Example 4 half-faced, and evaluated the makeup retention in the following three stages.
○: The makeup lasts well and hardly changes.
(Triangle | delta): The makeup possession is normal and has collapsed a little.
X: The makeup lasting was bad and it collapsed easily.

(An effect of preventing color transfer of the decorative film)
The cosmetic was applied to the left forearm so as to be 5 μl / cm ² and dried to prepare a cosmetic film. When the tissue paper was pressed against the decorative film while applying a load of 500 g, the degree of coloring transferred to the tissue paper was evaluated according to the following criteria, and the effect of preventing color transfer was compared.
○: Almost no coloring due to color transfer was observed.
(Triangle | delta): It turns out that the color transfer has arisen very minutely.
X: Color transfer was clearly recognized.

  As can be seen from the results of evaluation of makeup durability shown in Table 2, the cosmetic of the present application of Example 5 was excellent in long-lasting makeup and excellent in the effect of preventing color migration without being transferred to tissue paper.

Example 6 (sunscreen agent)
A sunscreen agent was prepared according to the formulation shown below. The 10% temperature sensitive polymer aqueous solution was added under the condition of 10 ° C. The sunscreen was superior in both freshness and lasting effect as well as freshness.

(Ingredient) (mass%)
2-Ethylhexyl paramethoxycinnamate 5.0
4-tert-butyl-4'-methoxydibenzoylmethane 2.0
Octyldodecyl myristate 3.0
Decamethylcyclopentasiloxane 5.0
Ethanol 2.0
Edetate disodium 0.02
Polyoxyethylene (60) hydrogenated castor oil 0.5
10% temperature-sensitive polymer aqueous solution (Note 3) 30.0
(Sol-gel transition temperature: 33 ° C.)
Glycerin 5.0
Polyacrylamide (Note 11) 1.0
Methylparaben 0.2
Purified water remaining amount (Note 11) Sepigel 501 (SEPPIC)

Example 7 (sunscreen agent)
A sunscreen agent was prepared according to the formulation shown below. The 10% temperature sensitive polymer aqueous solution was added under the condition of 10 ° C. The sunscreen agent was superior in both freshness and lasting effect as well as freshness.

(Ingredient) (mass%)
2-Ethylhexyl paramethoxycinnamate 7.5
4-tert-butyl-4′-methoxydibenzoylmethane 1.0
Isocetyl myristate 3.0
Silicone-treated zinc oxide 5.0
Octylsilylated titanium oxide 3.0
Squalane 5.0
Decamethylcyclopentasiloxane 3.0
Dimethylpolysiloxane 2.0
Sodium acrylate 2.5
/ Acrylic dimethyl taurate sodium copolymer (Note 9)
10% temperature-sensitive polymer aqueous solution (Note 4) 30.0
(Sol-gel transition temperature: 20 ° C.)
Ethanol 3.0
Edetate disodium 0.01
Xanthan gum 0.1
Nicotinamide 0.1
Purified water balance

Example 8 (water white powder)
In accordance with the formulation shown below, water white powder was prepared under conditions of 10 ° C. The white powder was superior in both freshness and moisturizing properties as well as freshness.

(Ingredient) (mass%)
Glycerin 7.0
Ethanol 4.0
1,3-butylene glycol 1.0
Phenoxyethanol 1.0
Methylparaben 0.1
Bentonite 0.15
Zinc oxide 9.0
Titanium oxide 2.0
Talc 3.0
Kaolin 0.2
Bengala 0.2
Yellow iron oxide 0.5
Black iron oxide 0.1
10% temperature-sensitive polymer aqueous solution (Note 3) 60.0
(Sol-gel transition temperature: 33 ° C.)
Purified water balance

  The cosmetic of the present invention is a sol at a temperature lower than the critical temperature in the range of 10 ° C. to 40 ° C., and forms a hydrogel at a temperature higher than the critical temperature, and exhibits a reversible sol-gel transition property. A cosmetic characterized by being produced by mixing an aqueous solution of a temperature-sensitive polymer that can be formed under conditions lower than the sol-gel transition temperature of the temperature-sensitive polymer. According to the present invention, the skin feel at the time of application and the feeling of application are good, it has a fresh and excellent feeling of use, the makeup lasts well even at high temperatures that sweat, and in addition it has excellent friction resistance or Sunscreen cosmetics can be provided.

Claims (2)

It is a sol at a temperature lower than the critical temperature in the range of 10 ° C. to 40 ° C., forms a hydrogel at a temperature higher than the critical temperature, exhibits a reversible sol-gel transition characteristic, and has a high temperature sensitivity capable of forming a film. A cosmetic for make-up or sunscreen, which is produced by mixing an aqueous solution of molecules under conditions lower than the sol-gel transition temperature of the temperature-sensitive polymer. Furthermore, glycerin is mix | blended, The cosmetics for makeup or sunscreen of Claim 1 characterized by the above-mentioned.