JP2007269712A - Release type pack cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a release type cosmetic releasable in a state retaining water and having high moisture retaining effect. <P>SOLUTION: The release type pack cosmetic comprises following (A) to (E) ingredients, and is a temperature-sensitive release type pack cosmetic which is gel state even at lower temperatures than the sol-gel transition temperature of (A) ingredient. The ingredients are (A) a temperature-sensitive polymer exhibiting reversible sol-gel transition property, that is, sol at lower temperatures than the critical temperature in the range of 10-40°C and hydrogel at higher temperatures than the critical temperature, (B) a water-soluble polymer having gelling ability, (C) glycerol, (D) an oil agent and (E) water. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a peelable pack cosmetic with high moisture retention that can be peeled off while retaining moisture after application. More specifically, a temperature-sensitive polymer that exhibits a sol-gel transition at the transition temperature and capable of forming a film, a water-soluble polymer having gelling ability, glycerin, an oil agent, and water are blended. The present invention relates to a peelable pack cosmetic that has excellent storage stability at a low temperature and excellent peeling properties after film formation and high moisture retention.

  Pack cosmetics cover the skin with a film for a certain period of time, while supplementing the skin with nutrients and moisture, and removing dust adhered to the skin surface and waste products secreted to the skin surface when removing the pack cosmetics. It is an effective cosmetic that can be expected to have a metabolism promoting effect that promotes the formation of new epidermal cells by removing the first keratin of the epidermis that has been cleaned and cleaned. There are various types of pack cosmetics, such as a type that is dried after application to form a film and then peeled, a type that wipes off or is washed away, or a sheet type. Among them, the peelable pack cosmetic is a simple pack cosmetic because the application area can be freely adjusted and it is not necessary to wash away. This peelable pack cosmetic is prepared by blending a film-forming agent as a main ingredient and a moisturizing agent, alcohols, preservatives, fragrance, powder and the like. As a film forming agent, polyvinyl alcohol is generally used (Non-Patent Document 1).

  However, in order to peel off the peelable pack cosmetic after being applied to the skin, it is necessary to evaporate and remove water to form a film. Therefore, the pack cosmetic needs to be applied thinly. There was a disadvantage inferior to. Further, even when an active ingredient is blended, the composition of the pack changes due to evaporation of moisture during the drying process, and there is a drawback that it is difficult to obtain the desired effect. Furthermore, since the oil agent is highly occlusive, it has the advantage of further improving the function of the pack cosmetic. However, when the oil agent is added to the peelable pack cosmetic containing polyvinyl alcohol, the polyvinyl alcohol does not form a gel and the oil agent There was a disadvantage that the compatibility of the preparation was poor and the long-term stability of the preparation was poor.

  On the other hand, a release-type pack cosmetic that can be peeled off in a short time by blending a temperature-sensitive polymer exhibiting sol-gel transition characteristics and gelling with skin temperature when applied to the skin in a sol state during storage. Has been proposed (Patent Document 1). This can be peeled even while retaining moisture, and improved moisture retention while maintaining ease of peeling, but the above-mentioned peelable pack cosmetic is also in a sol form when stored at a temperature lower than the transition temperature. For this reason, when an oil agent or the like is blended, the long-term storage stability is deteriorated, so that the blending of the oil agent or the like is limited. Also, the ease of peeling was not always satisfactory.

  In view of the above background, a peelable pack cosmetic that solves the disadvantages of thick film properties, moisture retention, effectiveness, storage stability, and release performance while maintaining the advantage of forming a gel that can be peeled on the skin is desired. It was rare.

Japanese Patent No. 3585309 Edited by Takeo Mitsui, “New Cosmetics”, Nanzando, published on January 12, 1993, p. 388

The present invention has been made in view of the above circumstances, and is a peelable pack cosmetic that can be peeled while retaining moisture, and has excellent long-term storage stability even when components such as oils are blended. An object is to provide a highly effective peelable pack cosmetic.

  In such a situation, as a result of earnest research, it is a sol at a low temperature and forms a hydrogel at a critical temperature in the range of 10 ° C. to 40 ° C., which is a temperature-dependent reversible sol-gel transition characteristic. Obtained by blending a temperature-sensitive polymer capable of forming a film, a water-soluble polymer having gelation ability even below the sol-gel transition temperature of the temperature-sensitive polymer, glycerin, an oil agent, and water. The peelable pack cosmetic is formed by gelation of a water-soluble polymer during storage at a temperature lower than the above critical temperature, and after applying to the skin, it is applied by body temperature or the like. As the temperature of the material itself increases, the temperature sensitive polymer also gels, so that a stronger gel is formed and it can be peeled off, and the present invention has been completed.

That is, the present invention is a peelable pack cosmetic comprising the following components (A) to (E), which is in a gelled state even at a temperature lower than the sol-gel transition temperature of the component (A): Sensitive peelable pack cosmetics.
(A) 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. Temperature-sensitive polymer (B) Water-soluble polymer having gelling ability (C) Glycerin (D) Oil agent (E) Water

  In addition, the second invention of the present application is the above-described temperature-sensitive peelable pack cosmetic which further comprises (F) a physiologically active ingredient.

  Furthermore, the third invention of the present application has a loss tangent tan δ (= G ″ / G ′) of 0.5 or less at 5 ° C. and 0 at 45 ° C. when dynamic viscoelasticity is measured with a rotary rheometer. The temperature-sensitive peelable pack cosmetic is characterized in that it is .2 or less.

  The peelable pack cosmetic of the present invention comprises a temperature-sensitive polymer capable of forming a film, a water-soluble polymer having gelling ability, glycerin, an oil, and water, and has a sol-gel transition temperature or higher of the temperature-sensitive polymer. On the skin, a film-like gel that sufficiently retains moisture and easily peels is formed. And it is possible to impart excellent moisture retention to the skin, and at the same time, when a physiologically active ingredient is blended, the skin can be effectively penetrated. Further, the peelable pack cosmetic of the present invention is excellent in the storage stability of the preparation because it does not become a sol and maintains a gel state even at a temperature lower than the transition temperature.

Hereinafter, the present invention will be described in detail. The component (A) 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 exhibits a reversible sol-gel transition property that forms a hydrogel at a temperature higher than the critical temperature. It is a temperature sensitive polymer capable of forming a film. Examples of such temperature-sensitive polymers include substances described in 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-sensitive block polymer aqueous solution composed of a temperature-responsive polymer and a hydrophilic polymer is heated, it rapidly gels at the phase separation temperature of the temperature-responsive polymer, and when the temperature is returned below the phase separation temperature, the original is instantly obtained. It has been shown that the property of returning to the solution state is obtained. The term “phase separation temperature” as used herein means that when a certain polymer (polymer) is above a certain critical temperature,
It is defined as a phenomenon that causes rapid dehydration and aggregates and insolubilizes due to hydrophobic interaction. Poly N-isopropylacrylamide (NIPAM) is famous as a temperature-responsive polymer exhibiting such “phase separation characteristics”. A polymer compound obtained by bonding a temperature-responsive polymer portion (block) and a hydrophilic polymer portion is preferable for carrying out the present invention, and one molecule of the temperature-responsive polymer portion 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.

(Dynamic viscoelasticity measurement conditions)
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, the 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 a screening method (dynamic viscoelasticity 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 component (A) 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% based on the total amount of the peelable pack cosmetic. The range of ˜50.0% by mass (hereinafter abbreviated as “%”) is preferable, and 2.0 to 20.0% is particularly preferable. If it is less than 0.5%, it cannot have gel strength that can be peeled off after coating, and if it exceeds 50.0%, swelling in water may be suppressed, and long-term storage stability may be difficult. .

  The water-soluble polymer having gelling ability used as the component (B) in the present invention is a water-soluble polymer that does not exhibit sol-gel transition characteristics but exhibits gel properties when formed into an aqueous solution. As a known substance.

  Specifically, carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, polyacrylamide, gum arabic, alginic acid or a salt thereof, carrageenan, agar, guar gum, quince seed, tamarind gum, dextrin, dextran, starch, locust bean gum, Karaya gum, tragacanth gum, pectin, quince, chitosan, xanthan gum, gellan gum, hyaluronic acid or its salts, pullulan, methylcellulose, ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, carboxymethylcellulose, cationized cellulose Can be used alone or in combination of two or more.

  Particularly preferred is a combination of one or more selected from the group consisting of carboxyvinyl polymer, alkyl-modified carboxyvinyl polymer, polyacrylamide, carrageenan, xanthan gum, hyaluronic acid or a salt thereof, and methylcellulose.

  The content of the component (B) in the peelable pack cosmetic of the present invention is such that the preparation substantially exhibits gel properties at a temperature lower than the sol-gel transition temperature of the component (A), and the sol-gel transition temperature. If the component (A) gels at a higher temperature to form a film, there is no particular limitation as long as it is within a concentration range that does not affect the peeling performance. The specific content should be appropriately determined according to the component (A) and the component (B) to be used, and cannot be specified unconditionally.

  In the peelable pack cosmetic of the present invention, when dynamic viscoelasticity is measured under the above conditions, at 5 ° C., which is lower than the sol-gel transition temperature of the component (A), the elastic term G ′ The loss tangent tan δ (= G ″ / G ′), which is the ratio of the viscosity term G ″, is 0.5 or less, and the loss tangent tan δ is 0.2 or less at 45 ° C. higher than the sol-gel transition temperature. It is preferable to adjust the contents of the components (A) to (E). If the loss tangent tan δ at 5 ° C. is 0.5 or less, the stability during storage at low temperatures is high, and if the loss tangent tan δ at 45 ° C. is 0.2 or less, sufficient film strength suitable for peeling is obtained. Can be secured.

  The content of glycerin as component (C) used in the present invention is usually preferably 0.01 to 50.0%, more preferably 0.1 to 30%, based on the total amount of the peelable pack cosmetic. Especially preferably, it is 1 to 20%. When the content is 0.01% or less, the moisture retention and gel strength may be inferior. When the content is 50.0% or more, the swelling of the components (A) and (B) into water is suppressed, and long-term storage stability is difficult. There is.

  Examples of the oil used as the component (D) in the present invention include volatile and non-volatile oils usually used in cosmetics, solvents or resins other than the above resins, and may be liquid, paste, or solid at room temperature. Although it does not matter, a liquid excellent in handling is 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.

  Examples of other forms of oil include dimethylpolysiloxane, methylhydrogenpolysiloxane, methylphenylpolysiloxane, polyether-modified organopolysiloxane, fluoroalkyl / polyoxyalkylene co-modified organopolysiloxane, and alkyl-modified organo. Silicone compounds such as polysiloxane, dimethiconol, terminal-modified organopolysiloxane, fluorine-modified organopolysiloxane, amodimethicone, silicone gel, acrylic silicone, trimethylsiloxysilicic acid, silicone RTV rubber, perfluoropolyether, fluorinated pitch, fluorocarbon, fluoro Fluorine compounds such as alcohol can be mentioned.

  The content of the oil in the present invention is usually preferably 0.001 to 50.0%, more preferably 0.01 to 30%, particularly preferably 0.1 to 0.1% based on the total amount of the peelable pack cosmetic. 20%. If it is less than 0.001%, it may be inferior in moisture retention, and if it exceeds 50.0%, it may not be possible to have gel strength that can be peeled off after application.

  The content of water as component (E) of the present invention is usually preferably 40 to 95%, more preferably 50 to 90%, particularly preferably 60 to 80%, based on the total amount of the peelable pack cosmetic. It is. If it is less than 40%, the component (A) and the component (B) may not be sufficiently swollen, and if it exceeds 95%, a peelable film may not be formed.

  Examples of the physiologically active ingredient used as the component (F) in the present invention 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, it is preferable to blend one or more of these physiologically active ingredients.

  Specific examples of these physiologically active ingredients include ashitaba extract, avocado extract, amacha extract, altea extract, arnica extract, aloe extract, apricot extract, apricot kernel extract, ginkgo biloba extract, fennel extract, turmeric extract, oolong tea extract, Ages extract, Echinacea leaf extract, Ogon extract, Oat extract, Auren extract, Barley extract, Hypericum extract, Oyster extract, Dutch mustard extract, Orange extract, Seawater extract, Seaweed extract, Hydrolyzed elastin, Hydrolyzed wheat powder, Hydrolyzed Silk, chamomile extract, carrot extract, cormorant extract, licorice extract, calcade extract, oyster extract, kiwi extract, kina extract, cucumber extract, guanosine, gardenia extract, kumazasa Kiss, Clara extract, Cranberry extract, Walnut extract, Grapefruit extract, Clematis extract, Chlorella extract, Mulberry extract, Gentian extract, Black tea extract, Yeast extract, Burdock extract, Fermented rice bran extract, Rice germ oil, Comfrey extract, Collagen, Cowberry extract Extract Extract, Japanese horse chestnut extract, European kizuta extract, Hawthorn extract, Elderberry extract, Yarrow extract, Japanese mint extract, Sage extract, mallow extract, senkyu extract, assembly extract, soybean extract, taisu extract, thyme extract, tea extract, clove extract, chigaya extract, chimpi extract, touki extract, tofu extract, tonin extract, spruce extract, dokudami extract, tomato extract, natto extract, Carrot extract, garlic extract, wild rose extract, hibiscus extract, bacmond extract, lotus extract, parsley extract, honey, hamamelis extract, parietaria extract, toad extract, bisabolol, loquat extract, dandelion extract, burdock extract, butterfly extract, butcher bloom extract, Grape extract, propolis, loofah extract, safflower extract, peppermint extract, body extract, button extract, hop Extract, Pine Extract, Marronie Extract, Citrus Extract, Mukuroji Extract, Melissa Extract, Peach Extract, Cornflower Extract, Eucalyptus Extract, Yukinoshita Extract, Yuzu Extract, Yakuinin Extract, Artemisia Extract, Lavender Extract, Apple Extract, Lettuce Extract, Lemon Extract, Forsythia Extract, Examples include rose extract, rosemary extract, Roman chamomile extract, royal jelly extract and the like.

Biopolymers such as deoxyribonucleic acid, mucopolysaccharide, sodium hyaluronate, sodium chondroitin sulfate, collagen, elastin, chitin, chitosan, hydrolyzed eggshell membrane, glycine, valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine , Lysine, aspartic acid, glutamic acid, amino acids such as cystine, cysteine, methionine, tryptophan, hormones such as estradiol, etenyl estradiol, moisturizing ingredients such as sodium lactate, urea, sodium pyrrolidonecarboxylate, betaine, whey, sphingolipid, ceramide , Oil components such as cholesterol, cholesterol derivatives, phospholipids, ε-aminocaproic acid, glycyrrhizic acid, β-glycyrrhetinic acid, lysozyme chloride, Anti-inflammatory agents such as guaiazulene, hydrocortisone, allantoin, tranexamic acid, azulene, vitamins A, B2, B6, C, D, E, vitamins such as calcium pantothenate, biotin, nicotinamide, vitamin C ester, allantoin, diisopropyl Active ingredients such as amine dichloroacetate and 4-aminomethylcyclohexanecarboxylic acid, antioxidants such as tocopherol, carotenoid, flavonoid, tannin, lignan, saponin, butylhydroxyanisole, dibutylhydroxytoluene, phytic acid, α-hydroxy acid, β -Cell activators such as hydroxy acids, γ-oryzanol, blood circulation promoters such as vitamin E derivatives, wound healing agents such as retinol and retinol derivatives, cephalanthin, licorice extract, chili pepper tincture, Nochithiol, garlic iodide extract, pyridoxine hydrochloride, dl-α-tocopherol, dl-α-tocopherol acetate, nicotinic acid, nicotinic acid derivative, calcium pantothenate, D-pantothenyl alcohol, acetyl pantothenyl ethyl ether, biotin, allantoin, Isopropylmethylphenol, estradiol, ethinylesteradiol, capronium chloride, benzalkonium chloride, diphenhydramine hydrochloride, takanal, camphor, salicylic acid, nonyl acid vanillylamide, nonanoic acid vanillylamide, piroctone olamine, pentadecanoic acid glyceryl, l-menthol, camphor, etc. Freshener, mononitroguaiacol, resorcin, γ-aminobutyric acid, benzethonium chloride, mexiletine hydrochloride, auxin, female hor Emissions, cantharides tincture, cyclosporine, zinc pyrithione, hydrocortisone, minoxidil, polyoxyethylene monostearate sorbitan, peppermint oil, Sasanishiki extract, and the like can be used.

  The compounding amount of the component (E) used in the present invention varies depending on the effective concentration of the active ingredient, and the concentration is appropriately set within the effective expression concentration range of each active ingredient. 0.001-20 mass% is preferable with respect to the total amount of peeling type pack cosmetics in conversion (dry residue conversion). For example, concentrations of ascorbic acid and salts thereof are 3% by mass, ascorbic acid glycosides are 2% by mass, and aloe extract is 0.1 to 99% by mass.

  The cosmetic of the present invention has the above-described components as essential components, but other components such as an anionic surfactant and an amphoteric surfactant are included in the composition as long as the object of the present invention is not impaired. Agent, nonionic surfactant, adhesive, powder (dye, resin, pigment), preservative, fragrance, moisturizer, salt, solvent, antioxidant, chelating agent, pearlizing agent, neutralizing agent, pH Components such as a regulator, an insect repellent, and an enzyme can be appropriately blended. 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 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 restrictions on the shape of these powders (spherical, rod-like, needle-like, plate-like, indeterminate, flake-like, spindle-like, etc.).

  The cosmetic of the present invention can be produced according to a conventional method. The dosage form of the peelable pack cosmetic of the present invention can be arbitrarily selected according to the purpose. That is, the thing of cream form, gel form, emulsion, aerosol form, etc. are mentioned. The cosmetics of the present invention are not limited to general cosmetics, and 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 1-2 and Comparative Examples 1-4
The peelable pack cosmetics having the respective compositions shown in Table 1 were prepared by a conventional method. About each obtained peeling type pack cosmetics, sensory evaluation (ease of peeling after application | coating, moisturizing feeling), storage stability evaluation, and the measurement of dynamic viscoelasticity were performed. The evaluation and measurement methods are shown below.

(sensory evaluation)
20 expert panelists evaluated the ease of peeling after application and the moisturizing feeling when each sample was applied to the face in the following five stages, and obtained an average score of 4.0 or more. A value of 0 or more and less than 4.0 was evaluated as ◯, a value of 2.0 or more and less than 3.0 was evaluated as Δ, and a value of less than 2.0 was evaluated as ×.
5: Very favorable 4: Preferred 3: Neither 2: Unfavorable 1: Very unfavorable

(Storage stability evaluation)
The changes over time when each sample was stored at room temperature for 1 month were evaluated according to the following criteria.
◎: No decrease in viscosity and separation ○: Although there is a decrease in viscosity, it is not separated △: A decrease in viscosity is caused and it is somewhat separated
X: The viscosity is lowered and separated.

(Measurement of dynamic viscoelasticity)
The measurement was performed in accordance with the above-described dynamic viscoelasticity measurement conditions, and the loss tangent tan δ (= G ″ / G ′) at 5 ° C. and 45 ° C. was obtained. For the measurement, the preparations prepared in Examples 1 and 2 and Comparative Examples 1 to 4 were used for measurement as they were.

  As can be seen from the evaluation results in Table 1, Examples 1 and 2 that satisfy all of the requirements of the present invention are excellent in any of moisturizing feeling, ease of peeling, and storage stability.

Example 3 (oil-in-water pack cosmetic)
An oil-in-water pack cosmetic was prepared according to the formulation shown below and conventional methods. The oil-in-water type pack cosmetic was excellent in stability, peelability and moisture retention.

(Ingredient) (mass%)
Squalane 2.0
Octyldodecyl myristate 2.0
SIMULGEL EG (Note 1) 1.0
Sepigel 501 (Note 1) 1.5
Temperature sensitive polymer (phase transition temperature 33 ° C) 10.0
Glycerin 5.0
1,3-butylene glycol 1.0
Polyvinyl alcohol 3.0
Edetate disodium 0.02
Methylparaben 0.2
Phenoxyethanol 0.1
Isopropylmethylphenol 0.1
Dipotassium glycyrrhizinate 0.1
Fragrance 0.1
Purified water remaining volume (Note 1) Made by SEPPIC

Example 4 (Water-in-oil pack cosmetic)
An oil-in-water pack cosmetic was prepared according to the formulation shown below and conventional methods. The oil-in-water type pack cosmetic was excellent in stability, peelability and moisture retention.

(Ingredient) (mass%)
Octyldodecyl myristate 2.0
Decamethylcyclopentasiloxane 5.0
Dimethylpolysiloxane 1.0
POE (60) hydrogenated castor oil 1.0
Polyoxyethylene monooleate 0.5
Sorbitan (20E.O.)
Temperature sensitive polymer (phase transition temperature 20 ° C) 10.0
Carboxyvinyl polymer 0.1
Alkyl-modified carboxyvinyl polymer 0.2
Glycerin 3.0
Ethanol 5.0
Edetate disodium 0.02
Methylparaben 0.2
Ethylparaben 0.05
Phenoxyethanol 0.1
Dipotassium glycyrrhizinate 0.1
Nicotinamide 0.3
Potassium hydroxide 0.15
Fragrance 0.1
Purified water balance

Example 5 (O / W type pack cosmetic)
O / W type pack cosmetics were prepared according to the formulation and the conventional method shown below. The O / W type pack cosmetic was excellent in stability, peelability and moisture retention.
(Ingredient) (mass%)
Stearic acid 1.0
Glycerol monoisostearate 2.0
Behenyl alcohol 2.0
Sara honey bee 1.0
Isocetyl myristate 1.0
Sorbitan isostearate 1.0
Retinyl palmitate 0.1
Hydrogenated lecithin 0.1
Ubidecarenone 0.03
Phytosterol 0.1
Plant Squalane 5.0
Dicapryl carbonate 5.0
Methylparaben 0.1
Glycerin 5.0
N-acetylglucosamine 0.1
Ascorbic acid sulfate disodium salt 0.2
γ-aminobutyric acid 0.1
Sodium N-stearoyl glutamate 0.2
Monoammonium glycyrrhizinate 0.1
Edelweiss Extract 0.2
Yeast extract (Note 2) 0.2
Alkyl-modified carboxyvinyl polymer 0.05
Temperature sensitive polymer (phase transition temperature 33 ° C) 10.0
Nicotinamide 0.1
Creatine 0.2
Carnitine chloride 0.1
Ascorbic acid phosphate magnesium 0.1
Purified water balance BR>
(Note 2) Dismutin BTJ (Penta Farm)

Example 6 (O / W type pack cosmetic)
O / W type pack cosmetics were prepared according to the formulation and the conventional method shown below. The O / W type pack cosmetic was excellent in stability, peelability and moisture retention.

(Ingredient) (mass%)
Phenoxyethanol 0.2
Glycerin 8.0
Dipropylene glycol 5.0
Raffinose 0.1
Hyaluronic acid dimethylsilanol solution (Note 3) 0.1
MPC polymer (Note 4) 0.1
Polyacrylate-13 (Note 5) 0.5
Temperature sensitive polymer (phase transition temperature 33 ° C) 10.0
Niga mint extract 0.1
Sodium citrate 0.05
Horsetail extract 0.1
Diisopropylamine dichloroacetate 0.2
γ-amino-β-hydroxybutyric acid 0.2
Sodium hyaluronate 0.001
Dipotassium glycyrrhizinate 0.2
Pentapeptide-3 (Note 6) 0.05
Decarboxycarnosine hydrochloride 0.05
Perfume 0.02
Purified water balance
Note 3) DSHC-N (manufactured by EXYMOL)
Note 4) Lipidur PMB (manufactured by NOF Corporation)
Note 5) SEPIPLUS400 (manufactured by SEPPIC)
Note 6) MATRIXYL (manufactured by Croda Japan)

  The fragrance | flavor used by said each prescription is the following.

  According to the present invention, it is possible to provide a peelable pack cosmetic that can be peeled while retaining moisture, has a high moisturizing effect, and is excellent in storage stability.

Temperature dependence of loss tangent tanδ in peelable pack cosmetics

Claims (3)

A temperature-sensitive peelable pack cosmetic comprising the following components (A) to (E), which is in a gelled state even at a temperature lower than the sol-gel transition temperature of the component (A): .
(A) 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. Temperature-sensitive polymer (B) Water-soluble polymer having gelling ability (C) Glycerin (D) Oil agent (E) Water The temperature sensitive peelable pack cosmetic according to claim 1, further comprising (F) a physiologically active ingredient. Loss tangent tan δ (= G ″ / G ′) when dynamic viscoelasticity is measured with a rotary rheometer is 0.5 or less at 5 ° C. and 0.2 or less at 45 ° C. The temperature sensitive peelable pack cosmetic according to claim 1 or 2.

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