JP2010189308A - Hair cosmetic - Google Patents

Abstract

The present invention relates to a hair cosmetic applied before a hair iron used for the purpose of forming or straightening a wave on the hair, protecting the hair from the heat damage of the hair iron, and maintaining the wave and straight effect. The present invention relates to a hair cosmetic composition that is excellent in strength, has no stiffness, and has a smooth touch feeling.
(A) Water-soluble polymer compound having a glass transition point of 160 ° C. or higher (B) Silicone having a flash point of 160 ° C. or higher selected from methylpolysiloxane, methylphenylpolysiloxane, dimethiconol and alkyl-modified methylpolysiloxane Oil (C) A hair cosmetic comprising a lower alcohol and applied to hair before using a hair iron.
[Selection figure] None

Description

The present invention relates to a hair cosmetic that is applied before setting hair using a hair iron that is used for the purpose of forming a wave or straightening hair, and protects the hair from thermal damage of the hair iron. The present invention relates to a hair cosmetic that is excellent in wave and straight effect, set sustainability, has no stiffness, and has a smooth feel.

Hairstyles are one of fashion and diversified. Especially for young people in their teens and 20s, hairstyles such as voluminous wavy hair with waves at the ends and straight hair that flutters in the wind are popular. As a method for forming these hairstyles, methods using “straight hair iron”, “curly hair iron”, and the like are increasing. A hair iron or iron generally evaporates moisture inside the hair instantaneously by heat at 120 to 180 ° C., and deforms the structure of the protein of the hair to wrinkle the hair. The heat of a hair iron gives heat to the hair at a very high temperature compared to the heat of a dryer (about 90 ° C). Therefore, when a hair iron or iron is used repeatedly, the protein of the hair is removed by heat and moisture transpiration. It is denatured and hair damage progresses gradually. For example, blisters (lifting), lift-up and peeling occur in cuticles on the surface of the hair, and chemical changes in the cystine and methionine constituting the protein and changes in the α-helix structure occur in the cortex inside the hair. However, the damage on the surface and inside of the hair proceeds in a complex manner, and eventually the cut hairs and split ends are generated.

As a method for protecting hair from heat, hair cosmetics generally blended with naturally derived materials such as plant extracts, hydrolyzed proteins such as keratin and collagen (see, for example, Patent Documents 1 and 2), polyhydric alcohols, Hair cosmetics (for example, see Patent Documents 3 to 6) in which various polymer polymers and silicones are combined and proposed have been proposed. However, although these inventions have the effect of protecting the hair from the heat of a low-temperature dryer, hydrolyzed proteins such as plant extracts and collagen are easily denatured against the heat of a high-temperature hair iron, The effect of protecting hair is not recognized. In addition, since the polyhydric alcohol has a lower flash point than that of the hair iron, it accelerates the degradation of hair proteins, which in turn causes the hair damage to be accelerated. In addition, for various polymer polymers, the heat of the hair iron softens the polymer compound and liquefies, causing scorching and smoke, not only preventing hair damage, but also scoring and deterioration of the hair iron. Arise.

Furthermore, when hair styling is performed using a hair iron, the progress of hair damage varies depending on the wetness of the hair. That is, when hair containing a large amount of moisture (wet hair) is heat-treated with a hair iron, hair damage proceeds at a speed several times that of dry hair (dry hair). As described above, this is because the moisture inside the hair suddenly boils due to the heat of the hair iron and promotes protein hydrolysis and the like. Therefore, when a styling agent having poor drying properties is applied, a large amount of moisture in the styling agent results in a state similar to wet hair, and damage to the hair is accelerated. For these reasons, hair cosmetics that protect hair damage from the high-temperature heat of hair irons and that can sustain the formed style are strongly desired in styling and brazing using hair irons and irons. It was.

In the specification, claims and abstract of the present invention, when simply described as “hair iron” or “iron” without any particular limitation, a specific “straight hair iron” or “curly hair iron” It includes not only irons but also irons for ironing, irons for ironing, irons for curling, irons for waffles, irons that are brought into contact with hair of other designations, and irons for ironing. In addition, not only appliances having a set temperature of about 120 to 180 ° C. used in general households, but also appliances that can be set to temperatures of 200 to 220 ° C. or higher, such as those used in beauty shops.

Japanese Patent Laid-Open No. 7-187965 JP 2000-302648 A JP 2004-59487 A JP 2005-232117 A JP-A-2005-232120 JP 2006-28114 A

The purpose of the present invention is to protect the hair from heat damage when heat-treated with a hair iron or trowel by applying it before the use of the hair iron or trowel. The object of the present invention is to provide a hair cosmetic composition that has a smooth feel and has a smooth feel.

As a result of diligent research in view of such circumstances, the present inventor has softened the hair surface with the heat of the hair iron by using a water-soluble polymer compound having a glass transition point higher than that of the hair iron. Without damaging the cuticle layer on the surface of the hair by keeping the thermal conductivity extremely low, and by controlling the boiling of water inside the hair by penetrating silicone oil into the hair to protect the hair protein, Furthermore, the present inventors have found that the above-mentioned problems can be solved without leaving moisture in hair by dissolving in a lower alcohol that enhances drying properties, and the present invention has been completed.

That is, in the present invention, (A) a water-soluble polymer compound having a glass transition point of 160 ° C. or higher (B) a flash point selected from methyl polysiloxane, methylphenyl polysiloxane, dimethiconol and alkyl-modified methyl polysiloxane is 160 ° C. or higher. This is a hair cosmetic characterized in that it contains a silicone oil (C) lower alcohol and is applied to hair before using a hair iron.

Moreover, the hair cosmetics of this invention contain the following (A)-(C) component, and are also characterized by apply | coating before using a hair iron.
(A) Water-soluble polymer compound whose glass transition point is not less than the use temperature of the hair iron (B) The flash point selected from methyl polysiloxane, methylphenyl polysiloxane, dimethiconol and alkyl-modified methyl polysiloxane is not less than the use temperature of the hair iron Silicone oil (C) lower alcohol

Before the hair cosmetic composition of the present invention sets hair using a hair iron such as a “straight hair iron” or “curly hair iron” that is used for the purpose of forming a wave or straightening the hair. By applying the hair, the hair can be protected from the heat damage of the hair iron, excellent in the wave and straight effect and the set sustainability, without being stiff, and imparting an excellent effect on the touch with a smooth hand.

Hereinafter, the present invention will be described in detail.

The water-soluble polymer compound (A) used in the present invention has physical properties having a glass transition point of 160 ° C. or higher. Or a glass transition point may have a physical property more than the use temperature of a hair iron. Here, the glass transition point is generally a temperature at which glass transition occurs in an amorphous solid material, and is usually written as Tg. In the case of an amorphous solid such as a water-soluble polymer, the state of rigidity and no fluidity at low temperatures means the temperature at which the rigidity and viscosity rapidly decrease by heating and show fluidity. To do. The water-soluble polymer compound used in the present invention is a nonionic polymer compound, a cationic polymer compound, or an anionic polymer compound, and has a glass transition point of 160 ° C. or higher. Or what has a glass transition point more than the use temperature of a hair iron may be used. Nonionic polymer compounds include, for example, polyvinyl pyrrolodon, polyvinyl caprolactam, VP / methacrylamide / vinyl imidazole, etc., and commercially available products thereof include rubiscol K30 (Tg = 175 ° C., manufactured by BASF), PVP K. -60 (Tg = 170 ° C., manufactured by ASP Japan), Rubiscol K90 (Tg = 180 ° C., manufactured by BASF), PVP K-90 (Tg = 174 ° C., manufactured by ASP Japan), PVP K -120 (Tg = 176 ° C., manufactured by ISP Japan), Rubiscol Plus (Tg = 165 ° C., manufactured by BASF), Ruby Set Clear (Tg = 218 ° C., manufactured by BASF) and the like. Examples of the cationic polymer compound include methyl vinyl imidazolium chloride / vinyl pyrrolidone copolymer, (vinyl pyrrolidone / methacrylamidopropyltrimethylammonium chloride) copolymer, (vinyl pyrrolidone / DMAPA acrylate copolymer), polyquaternium-11, polyquaternium- These are commercially available products such as Ruby Cut FC370 (Tg = 189 ° C., manufactured by BASF), Ruby Cut FC 550 (Tg = 207 ° C., manufactured by BASF), Ruby Cut Excelence (manufactured by BASF), Ruby Cut STYLE (Tg = 205 ° C., manufactured by BASF), GAFQUAT HS-100 (Tg = 182 ° C., manufactured by ISP Japan), STYLEZE CC-10 (Tg = 167 ° C., ASP Japan) Etc.). Examples of the anionic polymer compound include VP / acrylate / lauryl methacrylate copolymer. Examples of these commercially available products include STYLIZE 2000 (Tg = 165 ° C., manufactured by ISP Japan). Among these, a water-soluble polymer compound having a glass transition point of 180 ° C. or more is particularly preferred, and VP / methacrylamide / vinylimidazole as a nonionic polymer compound, methylvinylimidazolium chloride / vinylpyrrolidone as a cationic polymer compound. Copolymers, (vinyl pyrrolidone / DMAPA acrylic acid) copolymer, VP / acrylate / lauryl methacrylate copolymer, polyquaternium-28 and the like are preferred.

In the present invention, one or two or more selected from these water-soluble polymer compounds can be appropriately selected and used, and the blending amount thereof is preferably 0.1 to 10 mass with respect to the total amount of the hair cosmetic. % (Hereinafter, unless otherwise specified, mass% is simply indicated by “%”), more preferably in the range of 0.5 to 5%. If it is the range of this compounding quantity, since the hair is protected from the heat damage of a hair iron, the set effect is excellent and the outstanding touch can be provided, it is preferable.

The silicone oil of component (B) used in the present invention is a silicone oil having a flash point of 160 ° C. or higher selected from methylpolysiloxane, methylphenylpolysiloxane, dimethiconol and alkyl-modified methylpolysiloxane. Or the silicone oil whose flash point is more than the use temperature of a hair iron may be sufficient. These silicone oils are, for example, the following general formula (1)

(In the above formula, R ¹ represents hydrogen, a hydroxyl group or a methyl group, R ² represents hydrogen, an alkyl group having 1 to 6 carbon atoms, an alkenyl group or a phenyl group, and R ³ represents hydrogen or 1 to 24 carbon atoms. An alkyl group, an alkenyl group or a phenyl group, and m + n represents an integer of 10 or more.

Dimethylpolysiloxane has a chain-like molecular structure, and all organic groups bonded to silicon are composed of methyl groups. In the general formula (1), R ^{1 to} R ³ are methyl groups. These commercially available products include SH200 C FLUID 10CS to 1 million cs manufactured by Toray Dow Corning, TSF451-10A to 10MA manufactured by Momentive Performance Materials Japan, and silicon 96A10cs to 10 million manufactured by Shin-Etsu Chemical. cs etc. are mentioned. The methylphenylpolysiloxane is a dimethylpolysiloxane in which a part of the methyl group is substituted with a phenyl group. In the general formula (1), R ^{1 to} R ² are methyl groups and R ³ is a phenyl group. , Methylphenyl polysiloxane, trimethylpentaphenyltrisiloxane, and the like. Examples of these commercially available products include PH-155 manufactured by Toray Dow Corning, SF 1555 manufactured by Momentive Performance Materials Japan, KF-50 series, KF-54 manufactured by Shin-Etsu Chemical, and the like. Dimethiconol is dimethyllicorn having both ends blocked with hydroxyl groups, and R ¹ is a hydroxyl group in the above general formula (1). As these commercial items, 7-3100 Gum Blend HIP Emulsion manufactured by Toray Dow Corning, 7-3101 Gum
Blend HIP Emulsion, SILSOT E-50, SM558, YF3802A, XS65-B7991 manufactured by Momentive Performance Materials Japan, and KF-9701 manufactured by Shin-Etsu Chemical Co., Ltd. Alkyl-modified methylpolysiloxane is obtained by substituting a part of the methyl group of dimethylpolysiloxane with a long-chain alkyl group. In the general formula (1), R ³ is an alkyl group, and stearyl dimethicone, alkyl (C30-45) methicone, stearoxytrimethylsilane and the like. These commercially available products include 2503 Cosmeic WAX, AMS C-30 WAX manufactured by Toray Dow Corning, SF1528, SF1540 manufactured by Momentive Performance Materials Japan, KF-412 manufactured by Shin-Etsu Chemical, KF- 413, KF-414, KF-415, X-22-1877, and the like. The silicone oil of component (B) can also be used in the form of an aqueous emulsion in which silicone oil is emulsified in water. An activator or a nonionic surfactant is used, and the particle size is 0.01 to 100 μm. Specific examples of water-based emulsions include BY22-019, BY22-020, BY22-034, BY22-055 and BY22-060 manufactured by Toray Dow Corning, manufactured by Momentive Performance Materials Japan. FZ-4144, FZ-4150, FZ-4158, FZ-4170, FZ-4185 and FZ-4188 of FZ-400 series, XS65 series such as XS65-B5891, XS65-B7116, and the like.

In the present invention, one or two or more selected from silicone oils having a flash point of 160 ° C. or higher can be appropriately selected and used. The blending amount is preferably 0 with respect to the total amount of the hair cosmetic. 0.1 to 10%, and more preferably 0.5 to 5%. If it is the range of this compounding quantity, it will protect hair from the heat damage of a hair iron, and it has the outstanding touch and generation | occurrence | production suppression of the smoke at the time of ironing, and is especially preferable. Alternatively, one or two or more kinds selected from silicone oils having a flash point equal to or higher than the use temperature of the hair iron can be appropriately selected and used, and the preferable blending amount and the obtained effect are also the same.

Specific examples of the lower alcohol (C) used in the present invention include ethanol, propanol, isopropanol, isobutyl alcohol, t-butyl alcohol, and the like, and ethanol is particularly preferable. The blending amount of the lower alcohol is usually 20% or more, preferably 50% or more based on the total amount of the hair cosmetic. If the amount is within this range, the drying property after application is fast, and since a large amount of moisture is not left in the hair, the effect of the present invention can be exhibited without accelerating the thermal damage of the hair iron.

The hair cosmetic composition of the present invention contains the above-mentioned specific water-soluble polymer compound, silicone oil and lower alcohol as essential components. However, in addition to these essential components, normal hair as long as the effects of the present invention are not impaired. Other ingredients generally blended into cosmetics can be blended depending on the purpose.

Examples of such components include anionic surfactants such as lauryl sulfate, polyoxyethylene lauryl ether sulfate, lauryl benzene sulfonate, sodium lauroylmethyl-β-alanine; 2-alkyl-N-carboxymethyl Amphoteric surfactants such as -N-hydroxyethyl imidazolium betaine, coconut oil fatty acid amidopropyl betaine, coconut oil alkyl N-carboxyethyl-N-hydroxyethyl imidazolinium betaine sodium: polyoxyethylene alkyl ether, polyoxyethylene sorbitan Nonionic surfactants such as fatty acid esters and glycerin fatty acid esters; high cationized cellulose, hydroxyethyl cellulose, poly (diallyldimethylammonium chloride), highly polymerized polyethylene glycol, etc. Child compounds; wetting agents such as glycerin, propylene glycol, butylene glycol, dipropylene glycol; higher fatty acids such as stearic acid, behenic acid, oleic acid; ester oils such as isopropyl myristate; hydrocarbons such as liquid isoparaffin, petrolatum, squalane Silicones such as dimethylpolysiloxane, highly polymerized silicone and polyether-modified silicone; anti-dandruff components such as zinc pyrithione and benzalkonium chloride; L-aspartic acid, sodium L-aspartate, DL-alanine, L-arginine, glycine Amino acids such as L-glutamic acid, L-cysteine, and L-threonine; and other ultraviolet absorbers, preservatives, sugars, fragrances, colorants, sequestering agents, antioxidants, various drugs, and the like.

Hair cosmetics of the present invention are hair cosmetics such as hair lotions, hair liquids, hair mists, waters, blows, etc., emulsions / creamy hair cosmetics such as hair creams, hair treatments, hair milks, hair gels, hair foams, hair sprays, etc. It can be used for aerosol hair cosmetics. The hair cosmetic composition of the present invention can be produced by a conventional method.

EXAMPLES Next, although this invention is demonstrated in detail using an Example, this invention is not limited by this. Prior to the examples, test methods and evaluation methods employed in each example will be described.

(1) Thermal damage protection effect A hair iron (5 g, 10 cm) of Asian virgin hair was applied with 2.0 g of the hair cosmetic shown in the examples and comparative examples and heated to 180 ° C. after 2 minutes ( Processing is performed for 30 seconds using an ES2400 digital ceramic iron (manufactured by Reka). Next, after washing with a commercially available shampoo / conditioner, it was air-dried overnight at 25 ° C. and RH 60%.
This sample coating to air drying operation was repeated 60 times, and then the following tests were performed.

(A) Quantitative amount of cysteic acid 50 mg of hair was cut into small pieces with scissors, 10 mL of 6 mol / L hydrochloric acid aqueous solution was added, and hydrolyzed at 110 ° C. for 24 hours in a nitrogen atmosphere. After 1 mL of the supernatant was concentrated to dryness, 40 mL of 0.001 mol / L hydrochloric acid aqueous solution was added for dilution, and then the amount of cysteic acid was quantified by high performance liquid chromatography. In addition, it shows that hair damage is protected, so that cysteic acid content rate is low.

(B) Measurement of hair tensile strength 50 hairs having a thickness of 80 ± 5 μm were selected from the hair bundle, and the diameter of the hair was measured with a micrometer. Next, the tensile strength was measured using a texture analyzer (Stevens / Metric), and the load when the hair broke was measured. The average value was obtained by calculating the hair tensile strength from the values of the hair diameter and the breaking load. In addition, it shows that the higher the hair tensile strength, the less the occurrence of split ends and cut hairs, and the more the hair damage is protected.

(2) A set of Asian virgin hair bundles (1 g, 15 cm) commercially available curly hair in which 0.5 g of the hair cosmetics shown in Examples and Comparative Examples was uniformly applied and heated to 180 ° C. after 2 minutes A hair bundle was wound for 30 seconds using an iron for iron (digital curl iron 25 mm, manufactured by Adst) to form a wave. The hair bundle was removed from the curling iron and the apparent length (L1) of the hair bundle was measured. According to the following formula, the set force was obtained by the following formula and evaluated according to the following criteria.
Setting force (%) = (100 × (15−L1)) ÷ 15

(Criteria)
A: Setting force (%) ≧ 45
○: 45> setting force (%) ≧ 30
Δ: 30> setting force (%) ≧ 15
×: 15> setting power (%)

(3) Set retention effect After measuring the apparent length (L1) of the hair bundle for which the set force was evaluated, the hair bundle was then suspended in a constant temperature and humidity environment at a temperature of 25 ° C. and a humidity of 90% and left for 60 minutes. And then the apparent length (L2) of the hair bundle was measured again. According to the following formula, the set retention effect was determined by the following formula. The closer this value is to 100, the higher the set holding effect.
Set retention effect (%) = (15−L2) ÷ (15−L1) × 100

(Criteria)
A: Set retention effect (%) ≧ 90
○: 90> Set retention effect (%) ≧ 60
Δ: 60> Set retention effect (%) ≧ 30
×: 30> Set retention effect (%)

(4) Sensory test (no stiffness, smoothness)
Commercial hair curling irons (digital curling iron 25 mm) that were applied to hair bundles (10 g, 15 cm) of Asian virgin hair and coated with 2.0 g of hair cosmetics shown in Examples and Comparative Examples and heated to 180 ° C. after 2 minutes. , Manufactured by Adst) for 30 seconds to form a wave. After the hair temperature returned to room temperature, it was washed with a commercially available shampoo / conditioner and then air-dried overnight at 25 ° C. and RH 60%. After this sample coating to air drying operation was repeated 60 times, a sensory test was conducted on the smoothness of the hair of 20 specialist panels against the hair, and the evaluation was performed according to the following criteria.

(Criteria)
No worries (choose / no worries)
◎: It is determined that 15 or more people on the panel are not confused. ○: It is determined that 10 or more people on the panel are less than 15 people. △: It is determined that 5 or more people on the panel are less than 10 people. There are less than 5 people Smoothness (choose / choose from the two options)
◎: More than 15 people on the panel judged that the hair was smooth ○: More than 10 people on the panel and less than 15 people judged that the hair was smooth △: More than 5 people on the panel and less than 10 people said that the hair was smooth Judgment ×: Less than 5 panel members judged to be smooth

Examples 1-7 and Comparative Examples 1-7 (hair mist)
The hair mist shown in Table 1 was adjusted by a conventional method, and the thermal damage protection effect (quantitative cysteic acid, hair tensile strength), set force, set retention force, and sensory test (non-stiffness, smoothness) were evaluated and the results were evaluated. The results are also shown in Table 1.

As is apparent from Table 1, the hair cosmetics of the examples according to the present invention showed superior performance as compared with the comparative examples.

As is apparent from Table 1, the hair cosmetics of Examples 1 to 7 protect the hair from the heat damage of the hair iron, are excellent in the wave and straight effect, the set sustainability, are not stiff, and give a smooth feel. It was excellent.

Hereinafter, other formulation examples of the hair cosmetic composition of the present invention will be given as examples. In addition, also about the hair cosmetics of these Examples, each item was mentioned about the above-mentioned heat damage protection effect (quantity of cysteic acid, hair tensile strength), setting power, set holding power, and sensory test (no firmness, smoothness) As a result of the examination, all the examples had excellent characteristics and were good.

Example 8 (hair mist) (%)
(1) (VP / methacrylamide / vinylimidazole) copolymer 2.0
(Product name: Ruby Set Clear, Tg = 218 ° C., manufactured by BASF)
(2) Dimethylpolysiloxane (10 cs) 1.5
(Product name: KF96A 10cs, flash point: 180 ° C, manufactured by Shin-Etsu Chemical Co., Ltd.)
(3) Ethanol 60.0
(4) (Acrylates / stearyl acrylate / amine oxide methacrylate)
Copolymer 1.8
(4) Polyoxyethylene (60) hydrogenated castor oil 1.0
(5) 2-Ethylhexyl paramethoxycinnamate 0.1
(6) L-arginine 0.05 (7) Sodium L-glutamate 0.05 (8) Sodium diethylenetriaminepentaacetate 0.01 (9) Fragrance 0.1
(10) Purified water residue

(Production method) (2), (4), (5) and (9) are uniformly mixed and dissolved in (3), (10) is added, and then (1), (6) to (8) are added. The mixture was uniformly mixed and filled into a pump mist container to prepare a hair mist.

Example 9 (hair lotion) (%)
(1) (VP / methacrylamide / vinylimidazole) copolymer 0.3
(Product name: Ruby Set Clear, Tg = 218 ° C., manufactured by BASF)
(2) Methyl vinyl imidazolium / vinyl pyrrolidone copolymer 0.2
(Product name: Ruby Cut FC550, Tg = 207 ° C., manufactured by BASF)
(3) Dimethylpolysiloxane (10 cs) 1.0
(Product name: KF96A 10cs, flash point: 180 ° C, manufactured by Shin-Etsu Chemical Co., Ltd.)
(4) Methylphenylpolysiloxane 1.0
(Product name: KF-54, flash point: 315 ° C or higher, manufactured by Shin-Etsu Chemical Co., Ltd.)
(5) Ethanol 50.0
(6) Polyoxyethylene (60) hydrogenated castor oil 0.1
(7) 2-Ethylhexyl paramethoxycinnamate 0.1
(8) 1,3-BG 1.0
(9) Stearyl chloride trimethylammonium 0.5
(10) Sodium citrate 0.05 (11) Fragrance 0.1
(12) Residue of purified water

(Production Method) (3), (4), (6) to (9) and (11) are mixed and dissolved uniformly in (5), (12) is added, and then (1), (2) and ( 10) was added and mixed uniformly and filled into a container to prepare a hair lotion.

Example 10 (hair spray) (%)
(1) (VP / acrylate / lauryl methacrylate) copolymer 5.0
(Product name: STYLIZE 2000, Tg = 180 ° C.,
Made by IPS Japan)
(2) Stearyl dimethicone 2.0
(Product name: 2503 Cosmetic Wax, flash point: 165 ° C,
(Toray Dow Corning)
(3) Ethanol 42.0
(4) 2-Ethylhexyl paramethoxycinnamate 0.1
(5) Fragrance 0.1
(6) Purified water residue (7) Liquefied petroleum gas (0.3 MPa, 25 ° C.) 50.0

(Manufacturing method) (1)-(6) was uniformly mixed and dissolved to prepare a stock solution, filled into an aerosol pressure-resistant container, filled with a propellant (7), and a hair spray was prepared.

Claims (2)

(A) Water-soluble polymer compound having a glass transition point of 160 ° C. or higher (B) Silicone oil having a flash point of 160 ° C. or higher selected from methylpolysiloxane, methylphenylpolysiloxane, dimethiconol and alkyl-modified methylpolysiloxane (C) A hair cosmetic comprising a lower alcohol and applied to hair before using a hair iron. (A) Water-soluble polymer compound whose glass transition point is not less than the use temperature of the hair iron (B) The flash point selected from methyl polysiloxane, methylphenyl polysiloxane, dimethiconol and alkyl-modified methyl polysiloxane is not less than the use temperature of the hair iron A silicone cosmetic (C) comprising a lower alcohol, which is applied to hair before using a hair iron.