JPH11228333A - Thermal cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject cosmetic having moderate change of temperature on skin, giving comfortable thermesthesia to the skin, having the excellent persistence of generated heat temperature, having a good blood circulation- stimulating effect by adding a heat-generating substance coated with a silicone- based coating. SOLUTION: This thermal cosmetic contains (B) a heat-generating substance (for example, calcium dichloride) coated with (A) a silicone-based coating (for example, dimethylpolysiloxane). In the cosmetic, the component A is preferably used in an amount of 0.001-20 pts.wt. per pt.wt. of the component B. The heat- generating substance is coated with the coating, for example, by a method comprising heating the coating and subsequently mixing the heated coating with the heat-generating substance or by a method comprising dissolving or dispersing the coating in a solvent, mixing the solution or dispersion with the heat-generating substance and subsequently removing the solvent. The uses of the cosmetic include packs, gels and cosmetics.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal cosmetic composition which contains a heating substance coated with a specific coating agent and has excellent heat generation persistence.

[0002]

2. Description of the Related Art Conventionally, by adding a pyrogen such as calcined gypsum to a cosmetic, the temperature of the skin surface is increased to promote blood circulation, and a further cosmetic effect is obtained. That is being done. For example, Japanese Patent Application Laid-Open No. 57-114506 discloses a method of blending calcined gypsum or the like with a thermal cosmetic to promote skin metabolism. Japanese Patent Application Laid-Open No. 57-99514 discloses hair shampoo,
Hair rinses, hair treatments, hand cleaners and other cosmetics are formulated with an inorganic substance that generates heat in contact with water or a solvent in the cosmetics, thereby providing a comfortable warm feeling during use and promoting blood circulation. I have.

[0003] Here, it is preferable that the heat generation on the skin has a gradual temperature change and a constant temperature is maintained for a long time from the viewpoint of comfortable warm feeling and blood circulation promoting effect. However, in these conventional cosmetics, simply adding a pyrogen, or using sodium chloride, tartrate,
Gelatin, agar, gum arabic and other curing speed regulators and gelling polymers such as hydroxypropylcellulose and methylcellulose were only used in combination, making it difficult to control the heat generation temperature and to maintain the heat generation temperature persistence. In order to increase the temperature, a large amount of exothermic substance must be added, and there is a safety problem. In addition, when the reactivity with water is high, there is a problem that the heat generation state varies depending on the method of use.

[0004] Accordingly, an object of the present invention is to provide a thermal cosmetic that gives a comfortable warm feeling to the skin with a gradual change in temperature on the skin, has excellent persistence of the heat generation temperature, and has a good blood circulation promoting effect. And

[0005]

Under these circumstances, the present inventors have conducted intensive studies and found that a thermal cosmetic containing a heating substance coated with a specific coating agent satisfies the above requirements. Completed the invention.

[0006] That is, the present invention is a warm cosmetic containing a heating substance coated with a silicone coating agent.

The exothermic substance used in the present invention is not particularly limited, and examples thereof include inorganic anhydrides.
Specifically, calcium chloride _{(CaCl 2, CaCl 2 · H} 2 0, CaCl 2 ·
2H ₂ O), magnesium chloride (MgCl ₂ , MgCl ₂ 2H ₂ O, MgCl ₂
Chlorides such as 4H ₂ O), aluminum chloride (AlCl ₃ , AlCl ₃ .6H ₂ O), ferric chloride (FeCl ₃ , FeCl ₃ .2H ₂ O), zinc chloride (ZnCl ₂ ); magnesium sulfate ( _{MgS0 4, MgS0 4 · H 2} 0, MgS0
₄ · 4H ₂ 0), zinc sulfate (ZnSO · H ₂ 0), ferrous (FeS sulfate
_{0 4, FeS0 4 · H 2} 0), aluminum sulfate _{(Al (S0) 4) 3} ),
Calcium sulfate _{(CaS0 4, CaS0 4 · 1} / 2H 2 0, CaS0 4 · H 2 0) sulfate and the like; other dry alum, calcium oxide (Ca
0), sodium carbonate (Na ₂ CO _3), and sodium hydrogen phosphate (Na ₂ HP0 ₄₎ and the like.

The amount of heat generated by the heat generating substance and the time of heat generation are specific to the type of the heat generating substance. In general, the smaller the amount of water of crystallization, the larger the amount of heat generated by the same inorganic substance. These can be used alone or in combination of two or more, and are prepared according to the purpose so that the temperature becomes 10 to 80 ° C. by reaction with water, and are used on the skin when used as a skin cosmetic. It is preferable to control the temperature to be 30 to 50 ° C.

Specific examples of the silicone coating agent used in the present invention include linear polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane and methylhydrogenpolysiloxane, decamethylcyclopolysiloxane, dodecamethyl. Cyclic polysiloxanes such as cyclopolysiloxane and tetramethyltetrahydrogencyclopolysiloxane, silicone resin forming a three-dimensional network structure, silicone rubber, trimethylsiloxysilicate-octamethylcyclotetrasiloxane solution (50%), etc. No. Of these, preferred are room temperature liquid silicone oils such as chain polysiloxanes and cyclic polysiloxanes, and more preferred are chain polysiloxanes such as dimethylpolysiloxane, methylphenylpolysiloxane, and methylhydrogenpolysiloxane. .

The amount of the coating agent varies depending on the exothermic substance, the type of the coating agent and the coating method, but is preferably 0.1 to 1 part by weight of the exothermic substance so as to control the exothermic time and to make the reaction with water smooth. 001 to 20 parts by weight, especially 0.0
It is preferable to use 1 to 5 parts by weight. If the amount is less than 0.001 part by weight, the controllability of the temperature change is inferior, and the durability of the exothermic temperature is poor. If it exceeds 20 parts by weight, the contact between the exothermic substance and water is small, and the temperature rise may be weak.

The method of coating the exothermic substance with the coating agent is not particularly limited, and a usual coating method, for example, (1) a method in which the coating agent is heated, the exothermic substance is added and mixed, and (2) the coating agent is used. A method of dissolving or dispersing in a solvent, adding and mixing a heating substance, and removing the solvent; (3) a method of flowing a heating substance in a gas phase, spraying a coating agent dissolved in a solvent, and drying; A method of mixing, dissolving or dispersing a heating substance and a coating agent in a solvent and spray-drying the mixture is used.

By using the preparation containing the exothermic substance prepared in this manner, a warm cosmetic which gives a comfortable warm sensation to the skin with a gradual change in temperature and which is excellent in persistence of the exothermic temperature can be obtained. Can be The preparation is composed of a first agent mainly composed of a heat generating substance and a second agent mainly composed of water. When used, the first preparation mainly composed of the heat generation substance and water is mainly used. What is necessary is just to apply, after mixing with a 2nd agent just before use by the mixing method at the time of use.

[0013] In addition to the above components, other components can be added to the thermal cosmetic of the present invention as long as the quality is not impaired. Examples of such optional components include the following.

Liquid oils and fats include avocado oil, camellia oil, turtle oil, macadamia nut oil, corn oil, mink oil, olive oil, rapeseed oil, egg yolk oil, sesame oil, persic oil, wheat germ oil, southern oil, castor oil, flaxseed oil Oil, safflower oil, cottonseed oil, eno oil, soybean oil, peanut oil, teaseed oil, kaya oil, rice bran oil, sinagiri oil, Japanese kiri oil, jojoba oil, germ oil, triglycerin,
Glycerin trioctanoate, glycerin triisopalmitate and the like can be mentioned.

Solid fats and oils include cocoa butter, coconut oil, horse fat, hardened coconut oil, palm oil, tallow, sheep butter, hardened tallow, palm kernel oil, lard, beef bone fat, mocro kernel oil, hardened oil, Beef leg fat, mokuro, hardened castor oil and the like.

Examples of waxes include beeswax, candelilla wax, cotton wax, carnauba wax, bayberry wax, ibota wax, whale wax, montan wax, nuka wax, lanolin, kapok wax, lanolin acetate, liquid lanolin, sugar cane wax, isopropyl lanolin fatty acid, hexyl laurate, reduction Lanolin, Jojoba wax, hard lanolin, shellac wax, POE lanolin alcohol ether, PO
E Lanolin Alcohol Acetate, POE Cholesterol Ether, Lanolin Fatty Acid Polyethylene Glycol,
POE hydrogenated lanolin alcohol ethers and the like.

Examples of the hydrocarbon oil include liquid paraffin, ozokerite, squalene, pristane, paraffin, ceresin, squalene, petrolatum, microcrystalline wax and the like.

Examples of the lower alcohol include methanol, ethanol, propanol, isopropanol, isobutyl alcohol and t-butyl alcohol.

Examples of the higher alcohol include linear alcohols such as lauryl alcohol, cetyl alcohol, stearyl alcohol, behenyl alcohol, myristyl alcohol, oleyl alcohol, and cetostearyl alcohol, monostearyl glycerin ether (bacyl alcohol), and 2-decyltetradecyl alcohol. And branched-chain alcohols such as knol, lanolin alcohol, cholesterol, phytosterol, hexyldecanol, isostearyl alcohol and octyldodecanol.

The higher fatty acids include, for example, lauric acid, myristic acid, palmitic acid, stearic acid, behenic (beheninic) acid, oleic acid, 12-hydroxystearic acid, undecylenic acid, tallic acid, isostearic acid, linoleic acid, linoleic acid. Acid, eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and the like.

Examples of the humectant include polyethylene glycol, propylene glycol, glycerin, 1,3-
Butylene glycol, hexylene glycol, xylitol, sorbitol, maltitol, chondroitin sulfate, hyaluronic acid, mucoitin sulfate, caronic acid, atelocollagen, cholesteryl-12-hydroxystearate, sodium lactate, bile salts, dl-pyrrolidone carboxylate, Short-chain soluble collagen, adducts of diglycerin (EO) PO, extract of Iris osseum, extract of Achillea millefolium, extract of melilot and the like can be mentioned.

Examples of the lipophilic nonionic surfactant include sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, Sorbitan fatty acid esters such as diglycerol sorbitan penta-2-ethylhexylate and diglycerol sorbitan tetra-2-ethylhexylate, glycerin mono-cottonseed oil fatty acid, glycerin monoerucate, glycerin sesquioleate, glyceryl monostearate, α,
Glycerin polyglycerin fatty acids such as glycerin α'-oleate pyroglutamate and glyceryl monostearate; propylene glycol fatty acid esters such as propylene glycol monostearate; hydrogenated castor oil derivatives; glycerin alkyl ether;

Examples of the hydrophilic nonionic surfactant include POE sorbitan fatty acid esters such as POE sorbitan monooleate, POE-sorbitan monostearate, POE-sorbitan monooleate, POE-sorbitan tetraoleate, and POE-sorbitan. Sorbit Monolaurate, POE-Sorbit Monooleate, POE
-POE sorbitol fatty acid esters such as sorbit pentaoleate and POE-sorbit monostearate, POE glycerin fatty acid esters such as POE-glycerin monostearate, POE-glycerin monoisostearate and POE-glycerin triisostearate; POE monooleate, POE distearate,
POE fatty acid esters such as POE monodioleate and ethylene glycol cysteate, POE lauryl ether, POE oleyl ether, POE stearyl ether, POE behenyl ether, POE alkyl ethers such as POE2-octyldodecyl ether, POE cholestanol ether, POE octyl POE alkyl phenyl ethers such as phenyl ether, POE nonyl phenyl ether and POE dinonyl phenyl ether; pluronic type such as bruronic;
POE / POP alkyl ethers such as POP cetyl ether, POE / POP2-decyltetradecyl ether, POE / POP monobutyl ether, POE / POP hydrogenated lanolin, POE / POP glycerin ether, and tetraPOE / tetraPOP ethylenediamine such as Tetronic Condensates, POE castor oil, POE hardened castor oil, POE hardened castor oil monoisostearate,
POE-cured castor oil triisostearate, POE-cured castor oil monopyroglutamic acid monoisostearate diester, POE-casted oil-cured castor oil derivatives such as POE-cured castor oil maleic acid, POE beeswax lanolin derivatives such as POE sorbitol beeswax, coconut oil Fatty acid diethanolamide, lauric acid monoethanolamide,
Alkanolamides such as fatty acid isopropanolamide, POE propylene glycol fatty acid ester, PO
E alkylamine, POE fatty acid amide, sucrose fatty acid ester, POE nonylphenylformaldehyde condensate, alkylethoxydimethylamine oxide, trioleyl phosphoric acid and the like.

The powder component includes talc, kaolin, mica, sericite (sericite), muscovite, phlogopite, synthetic mica, rhodolite, biotite, litthic mica, vermiculite,
Magnesium carbonate, calcium carbonate, aluminum silicate, barium silicate, calcium silicate, magnesium silicate, strontium silicate, metal tungstate, magnesium, silica, zeolite, calcium phosphate, fluoroapatite, hydroxyapatite, ceramic powder, metal soap (Zinc myristate, calcium palmitate, aluminum stearate), inorganic powder such as boron nitride, polyamide resin powder (nylon powder), polyethylene powder, polymethyl methacrylate powder, polystyrene powder, copolymer resin of styrene and acrylic acid Powder, benzoguanamine resin powder, polytetrafluoroethylene powder, organic powder such as cellulose powder, inorganic white pigment such as titanium dioxide, zinc oxide, iron oxide (bengara),
Inorganic red pigments such as iron titanate, inorganic brown pigments such as γ-iron oxide, yellow iron oxide, inorganic yellow pigments such as loess black iron oxide, carbon black, inorganic black pigments such as lower titanium oxide, Inorganic purple pigments such as mango violet and cobalt violet; inorganic green pigments such as chromium oxide, chromium hydroxide and cobalt titanate; inorganic blue pigments such as ultramarine blue and dark blue; titanium oxide coated mica; titanium oxide coated bismuth oxychloride , Titanium oxide coated talc, colored titanium oxide coated mica, bismuth oxychloride, pearl pigments such as fish scale foil, aluminum powder,
Metal powder pigments such as copper powder, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red 220
No. Red 226, Red 228, Red 405, Orange 203, Orange 204, Yellow 205, Yellow 401
No. 3, and organic pigments such as Blue No. 404, Red No. 3, Red No. 104, Red No. 106, Red No. 227, Red No. 230
No. Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3
Organic pigments such as zirconium, barium or aluminum lakes such as No. 1 and Blue No. 1, and natural pigments such as chlorophyll and β-carotene. These may be used alone or in combination of two or more. However, the powder may be any powder that can be applied to general cosmetics, and is not limited to the above components.

Examples of natural water-soluble polymers include, for example, gum arabic, tragacanth gum, galactan, guar gum, carob gum, karaya gum, carrageenan, pectin, agar, quince seed (quince), alge colloid (cassow extract), starch (rice, corn) , Potato, wheat), plant polymers such as glycyrrhizic acid, microbial polymers such as xanthan gum, dextran, succinoglucan, pullulan, collagen,
Animal-based polymers such as casein, albumin, and gelatin are exemplified.

As the semi-synthetic water-soluble polymer, for example,
Starch-based polymers such as carboxymethyl starch and methylhydroxypropyl starch, methylcellulose, nitrocellulose, ethylcellulose, methylhydroxypropylcellulose, hydroxyethylcellulose, cellulose sodium sulfate, hydroxypropylcellulose, sodium carboxymethylcellulose (CM
C), cellulosic polymers such as crystalline cellulose and cellulose powder, and alginic acid polymers such as sodium alginate and propylene glycol alginate.

Examples of the synthetic water-soluble polymer include vinyl polymers such as polyvinyl alcohol, polyvinyl methyl ether, polyvinyl pyrrolidone, and carboxyvinyl polymer (Carbopol);
000, 4,000,000, 600,000 and other polyoxyethylene polymers, polyoxyethylene polyoxypropylene copolymer copolymer polymers, sodium polyacrylate, polyethyl acrylate, polyacrylamide, etc. Acrylic polymer, polyethylene imine,
And cationic polymers.

Examples of the inorganic water-soluble polymer include bentonite, silicic acid A1Mg (Vegum), laponite,
Hectorite, silicic anhydride and the like.

Examples of the ultraviolet absorber include para-aminobenzoic acid (hereinafter abbreviated as PABA), PABA monoglycerin ester, N, N-dipropoxy PABA ethyl ester, N, N-diethoxy PABA ethyl ester, N,
Benzoic acid-based ultraviolet absorbers such as N-dimethyl PABA ethyl ester and N, N-dimethyl PABA butyl ester; anthranilic acid-based ultraviolet absorbers such as homomenthyl-N-acetylanthranilate; amyl salicylate;
Salicylic acid UV absorbers such as menthyl salicylate, homomenthyl salicylate, octyl salicylate, phenyl salicylate, benzyl salicylate, p-isopropanol phenyl salicylate, octyl cinnamate, ethyl-4-isopropyl cinnamate, methyl-2,5-diisopropyl cinnamate , Ethyl-2,
4-diisopropylcinnamate, methyl-2,4-diisopropylcinnamate, propyl-p-methoxycinnamate, isopropyl-p-methoxycinnamate, isoamyl-p-methoxycinnamate, octyl-p-methoxycinnamate (2- Ethylhexyl-p
-Methoxycinnamate), 2-ethoxyethyl-p-
Methoxy cinnamate, cyclohexyl-p-methoxy cinnamate, ethyl-α-cyano-β-phenyl cinnamate, 2-ethylhexyl-α-cyano-β-phenyl cinnamate, glyceryl mono-2-ethylhexanoyl-diparamethoxy Cinnamic acid-based ultraviolet absorbers such as cinnamate, 3,4,5-trimethoxycinnamic acid 3-methyl-4- [methylbis (trimethylsiloxy) silyl] butyl, 2,4-dihydroxybenzophenone, 2,2 ′
-Dihydroxy-4-methoxybenzophenone, 2,
2′-dihydroxy-4,4′-dimethoxybenzophenone, 2,2 ′, 4,4′-tetrahydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxy-4′-methylbenzophenone, 2-hydroxy-4methoxybenzophenone-5-sulfonate, 4-phenylbenzophenone, 2
-Ethylhexyl-4'-phenyl-benzophenone-
Benzophenone-based ultraviolet absorbers such as 2-carboxylate, hydroxy-4-n-octoxybenzophenone and 4-hydroxy-3-carboxybenzophenone;
(4′-methylbenzylidene) -d, l-camphor, 3
Benzylidene-d, l-camphor, urocanic acid,
Urocanic acid ethyl ester, 2-phenyl-5-methylbenzoxazole, 2,2′-hydroxy-5-methylphenylbenzotriazole, 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazole, -(2'-hydroxy-5'-methylphenylbenzotriazole, dibenzalazine, dianisylmethane, 4-methoxy-4'-t-butyldibenzoylmethane, 5- (3,3-dimethyl-2-norbornylidene)
-3-pentan-2-one and the like.

In addition, raw materials used in ordinary cosmetics, such as drugs, coloring materials, and plant extracts, can be blended within a range that does not impair the effects of the present invention.

Examples of the use of the thermal cosmetic of the present invention include packs, gels, cosmetic liquids, and the like.

[0032]

Next, the present invention will be specifically described with reference to examples. The present invention is not limited by this.

Example 1 (1) anhydrous magnesium sulfate 20.0% by weight (2) dimethylpolysiloxane 1.0 (3) glycerin 20.0 (4) ion-exchanged water 56.0 (5) sodium alginate 1.5 (6) Cellulose 1.0 (7) Caffeine 0.5 (Preparation method) (1) and (2) are placed in a closed container and treated under reduced pressure for 24 hours. Disperse the treated (1) in (3) (1 agent). Separately, (4), (5), (6), and (7) are uniformly mixed (two agents), and one agent and two agents are mixed at the time of use.

Example 2 (1) Anhydrous sodium hydrogen phosphate 15.0% by weight (2) Dimethyl polysiloxane 1.0 (3) Polyethylene glycol 400 25.0 (4) Deionized water 56.0 (5) Carboxy Sodium methylcellulose 1.0 (6) Cellulose 2.0 (Preparation method) (1) and (2) are placed in a closed container and treated under reduced pressure for 24 hours. Disperse the treated (1) in (3) (1 agent). Separately, (4), (5), and (6) are uniformly mixed (two agents), and one agent and two agents are mixed at the time of use.

Example 3 (1) Anhydrous sodium hydrogen phosphate 10.0% by weight (2) Methylphenyl polysiloxane 0.5 (3) Polyethylene glycol 400 20.0 (4) Deionized water 67.89 (5) Sodium carboxymethylcellulose 0.2 (6) Cellulose 0.2 (7) L-alanine 1.0 (8) Sodium edetate 0.01 (9) Caffeine 0.2 (Production method) (1), (2) Place in a closed container and treat under reduced pressure for 24 hours. Disperse the treated (1) in (3) (1 agent). Separately, (4), (5), (6), (7), (8), (9) are evenly mixed (two agents)
At the time of use, one agent and two agents are mixed.

Example 4 (1) anhydrous sodium hydrogen phosphate 30.0% by weight (2) dihydrohexamethylcyclotetrasiloxane 0.5 (3) glycyrrhizic acid 1.0 (4) ethanol 33.5 (5) Isopropyl myristate 7.0 (6) Isopropyl palmitate 8.0 (7) Glycerin 20.0 (8) Perfume Appropriate amount (Production method) Put (1) and (2) in a closed container, and reduce the pressure for 24 hours. To process. Disperse the treated (1) in (4) (1 agent). Separately, (3), (5), (6), (7), and (8) are uniformly mixed (two agents), and one agent and two agents are mixed at the time of use.

Example 5 (1) Magnesium sulfate 5.0% by weight (2) Methyl hydrogen polysiloxane 1.0 (3) Sucrose 50.0 (4) Polyethylene glycol 6000 20.0 (5) Silica 5.0 (6) Vitamin C 5.0 (7) Appropriate amount of coloring agent (8) Ion-exchanged water 14.0 (Preparation method) Put (1) and (2) in a closed container, treat under reduced pressure for 24 hours (1 agent) . Separately, (3), (4), (5), (6), (7), and (8) are uniformly mixed (two agents). Mix everything at the time of use.

Comparative Examples 1 to 5 Comparative Examples 1 to 5 were prepared in the same manner as in Examples 1 to 5 except that a silicone-based coating agent was added without heat treatment with a heat-generating substance without being subjected to reduced pressure treatment (uncoated). A sample was prepared.

Comparative Example 6 A sample of Comparative Example 6 was prepared in the same manner as in Example 1, except that a higher fatty acid such as oleic acid was used instead of dimethylpolysiloxane as the coating agent. In this case, the stability of the product was poor and the product was not usable.

Using Examples 1 to 5 and Comparative Examples 1 to 5, the exothermic temperatures after 30 seconds, 5 minutes and 15 minutes were measured. Table 1 shows the results.

[0041]

[Table 1] 例 Example Comparative example ─────────────── ─────── 1 2 3 4 5 1 2 3 4 5 5 After 30 seconds 55 40 42 45 57 70 45 46 51 80 After 5 minutes 50 42 45 47 55 40 35 33 37 45 After 15 minutes 40 40 44 43 42 32 33 33 34 32 ───────────────── ──────────

As is clear from Table 1, in Examples 1 to 5, the reaction between the exothermic substance and water was controlled, the temperature was raised slowly, and the exothermic temperature was maintained. On the other hand, in Comparative Examples 1 to 5 in which the exothermic substance was solely blended without using the coating agent, the temperature was raised simultaneously with the addition of water, and no sustained exothermic temperature was observed.

[0043]

As described above, the thermal cosmetic of the present invention has a gentle temperature change on the skin, gives a comfortable warm feeling to the skin, has excellent sustained heat generation temperature, and has an effect of promoting blood circulation. Good.

Claims (4)

[Claims] 1. A thermal cosmetic comprising a heating substance coated with a silicone coating agent. 2. The thermal cosmetic according to claim 1, wherein the silicone coating agent is a silicone oil which is liquid at normal temperature. 3. The warm cosmetic according to claim 2, wherein the silicone oil which is liquid at normal temperature is a linear polysiloxane. 4. The thermal cosmetic according to claim 1, wherein the amount of the coating agent used is 0.001 to 20 parts by weight based on 1 part by weight of the heating substance.