KR20080007341A - Hair cosmetic - Google Patents

Abstract

A hair cosmetic comprising (a) 0.05 to 1.0% by mass of acetylcysteine and (b) a specified silicone block copolymer. The hair cosmetic can make the hairs straight and, therefore, is superior in providing such a feeling that the hair stream becomes straight (i.e., "straight touch"). The hair cosmetic can also protect the hairs from damaging, and is superior in making the hairs smooth and manageable.

Description

Hair cosmetics {HAIR COSMETIC}

The present invention relates to a hair cosmetic, and more particularly, by combining acetylcysteine and a specific silicone block copolymer, the effect of providing straight hair and feeling of straightening the hair (straight). The present invention relates to a hair cosmetic having excellent effects, and an effect of preventing damage to hair, and an effect of making the hair smooth and easy to trim.

Hair is well-groomed, shiny, smooth, and easy to trim. However, hair is not exposed to a lot of damage such as fading, fluffing, hair splitting, hair cutting, etc. due to daily exposure to sunlight or the atmosphere, or exposure to the hot air of a dryer.

In addition, in order to make the hair look beautiful, straight hair is known to straighten the hair flow and straighten the hair, but the straight hair straightens the hair itself, but applies the medicine to the hair for a certain period of time like a normal permanent wave or a hair dye. As a result of chemical treatment, the hair is actually further damaged. In damaged hair, the epidermis and the keratin fibers inside the hair are damaged, and the components in the hair, such as a melanin pigment, a pigment derived from a hair dye, and a fat, are easily eluted. And, when the damaged hair is left unattended, the hair damage proceeds further.

Background Art Conventionally, various attempts have been made to prevent and protect the hair from damage in the composition for hair. For example, water-soluble polymers, protein derivatives, silicones, plant extracts and the like have been blended for the purpose of protecting hair and preventing elution of components in the hair (see Patent Documents 1 to 5, for example). In addition, an ultraviolet absorber has been blended in order to prevent damage to hair caused by sun exposure (see Patent Document 6, for example).

However, when a water-soluble polymer, a protein derivative, or the like is blended, a large amount of these components in combination to bring about a sufficient effect has the disadvantage of causing dandruff flaking to the hair. Moreover, the hair damage prevention effect was not enough in these components. In addition, when the ultraviolet absorber is blended, it has the effect of preventing fading of hair due to exposure to sunlight, but when the above-mentioned components are added in large amounts to bring out sufficient effects, the stability of the product may be impaired.

On the other hand, thiol compounds, such as acetyl cysteine, are conventionally used as a reducing agent mix | blended with a permanent wave and a straight permanent agent (for example, refer patent document 7 and 8).

It is reported that the effect of inhibiting hair damage is obtained by combining this thiol compound with silicones and an ultraviolet absorber. For example, a hair cosmetic using amino modified silicone and N-acetylcysteine is disclosed (patent). See Document 9.

However, in the amino modified silicone which does not have such a polyoxyalkylene block, what was satisfactory in the effect of providing a feeling of straightness, the effect of preventing damage to hair, smoothness, etc. could not be obtained.

Patent document 1: Unexamined-Japanese-Patent No. 6-92824

Patent Document 2: JP-A-769844

Patent document 3: Unexamined-Japanese-Patent No. 8-48698

Patent Document 4: Japanese Unexamined Patent Publication No. 9715715

Patent document 5: Unexamined-Japanese-Patent No. 8-231348

Patent Document 6: Japanese Unexamined Patent Publication No. 7-228510

Patent document 7: Unexamined-Japanese-Patent No. 8-269003

Patent Document 8: Japanese Unexamined Patent Publication No. Hei 5-39211

Patent document 9: Unexamined-Japanese-Patent No. 7-138132.

Disclosure of the Invention

Problems to be Solved by the Invention

Conventionally, without giving a chemical treatment such as a straight permanent which may cause damage, it is possible to give a feeling (straightness) as if the hair with a bend or a bend is straightened and the hair flows in an orderly manner, and The development of the hair cosmetic which is excellent in the effect that it protects damage of a hair, makes hair smooth, and is easy to prepare, and it is a subject of this invention to provide such a hair cosmetic.

Means to solve the problem

In view of such a situation, the present inventors have made intensive studies to solve the above problems, and as a result, by using a combination of a specific amount of acetylcysteine and a specific silicone block copolymer, the hair is chemically changed like a straight permanent hair. Although there is no effect to make the hair bent and bent, the hair is straightened and the flow of hair becomes smooth (hereinafter referred to as a `` straightness ''), while the effect of preventing hair damage is excellent. The hair cosmetics excellent in the effect of making it smooth and easy to prepare were found, and based on this knowledge, the present invention was completed.

That is, the present invention is a hair cosmetic comprising the following components (a) and (b):

(a) 0.05-1.0 mass% of acetylcysteine; And

(b) a silicone-based block copolymer represented by Formula 1 below:

[Wherein, R ¹ independently of one another represents a monovalent hydrocarbon group, hydroxyl group or alkoxy group which does not contain aliphatic unsaturation, X ¹ represents a general formula: -R ³ -Z ¹ (wherein R ³ is a direct bond or carbon A divalent hydrocarbon group having 1 to 20 atoms, Z ¹ represents an amino group-containing group or an ammonium group-containing group), R ² independently of each other, represents either R ¹ or X ¹ , and n Is an integer of 2 to 4, a is an integer of at least 1, c is an integer of at least 2, d is an integer of at least 2, bxd is at least 1, and Y is adjacent silicon by carbon-silicon A divalent organic group bonded to an atom and bonded to a polyoxyalkylene block by an oxygen atom, wherein the average molecular weight of each siloxane block is about 250 to about 1,000,000, and the average of each polyoxyalkylene block is Molecular weight is from about 200 to about 10,000, the siloxane blocks constitute from about 25 to about 95% by weight of the copolymer, and the block copolymer has an average molecular weight of at least about 5,000.

Effects of the Invention

The hair cosmetic of the present invention is excellent in the effect of preventing hair damage while providing a straight feeling to the hair, and excellent in making the hair smooth and easy to trim.

Implement the invention  Best form for

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated.

Acetylcysteine of the component (a) used in the present invention is a reducing agent generally formulated as an active ingredient of a permanent wave agent or a straight permanent agent, and cuts the disulfide bonds in the hair to make the hair bent or curved. It can be an ingredient.

The compounding quantity of the acetyl cysteine of the component (a) used for this invention is 0.05-1.0 mass% (henceforth only "%") in hair cosmetics, and 0.1-0.5% is more preferable. If it is this range, a feeling of straightness is fully felt without feeling the stimulus and hair damage similar to when performing normal permanent, and the effect of making hair fluttering can be acquired. And further effect can be acquired by repeating continuous use.

On the other hand, specific silicone block copolymers having a functional group having a reactive property of component (b) that can be used in the present invention are represented by the following general formula (1):

[Formula 1]

.

.

In the above formula, R ¹ is, independently from each other, a monovalent hydrocarbon group, a hydroxyl group or an alkoxy group containing no aliphatic unsaturation. Among these, as the monovalent hydrocarbon group containing no aliphatic unsaturation, for example, methyl group, ethyl group, Although it is a propyl group, a butyl group, an octyl group, a dodecyl group, a phenyl group, a phenethyl group, etc., especially a methyl group and a phenyl group are preferable. Moreover, as an alkoxy group, carbon number, such as a methoxy group, an ethoxy group, a propoxy group, butoxy group, isopropenyloxy group, a methoxyethoxy group, a phenyloxy group, an acetoxy group, a cyclohexyloxy group, and a dodecanyloxy group The alkoxy group of 1-12, preferably C1-C8, More preferably, C1-C6, especially a methoxy group and an ethoxy group are preferable.

X ¹ is the following general formula:

-R ³ -Z ¹

(R ³ represents a direct bond or a divalent hydrocarbon group having 1 to 20 carbon atoms, Z ¹ represents an amino group-containing group or an ammonium group-containing group). Among these, specific examples of the R ³ group include, for example, —CH ₂ —, —CH ₂ CH ₂ —, —CH ₂ CH ₂ CH ₂ —, —CH (CH ₃ ) CH ₂ —, — (CH ₂ ) ₄ − ,-(CH ₂ ) ₆ -,-(CH ₂ ) _8- , -CH ₂ CH ₂ C ₆ H ₄ -,-(CH ₂ ) ₁₂ -,-(CH ₂ ) _16- , preferably a propylene group to be. Further, as specific examples of the group X ¹ examples include, for example _{- (CH 2) 3 NH 2} , - (CH 2) 3 NH (CH 2) 2 NH 2, - (CH 2) 3 N (CH 3) 2, -(CH ₂ ) ₃ N (CH ₃ ) (CH ₂ ) ₂ N (CH ₃ ) ₂ ,-(CH ₂ ) ₃ N ⁺ (CH ₃ ) ₃ Cl ^- ,-(CH ₂ ) ₃ N (CH ₃ ) (CH ₂ ) ₂ N (CH ₃ ) C = 0 (CH ₃ ), and the like.

R ² independently of each other represents one of R ¹ or X ¹ , n is an integer of 2 to 4, a is an integer of at least 1, c is an integer of at least 2, and d is at least 2 It is an integer and bxd is at least 1 or more.

Examples of the divalent organic group represented by the Y group include -R ^4- , -R ⁴ CO-, -R ⁴ NHCO-, -R ⁴ -NHCONHR ⁵ -NHCO- or -R ⁴ -00CNH-R ⁵ -NHCO (Wherein R ⁴ is a divalent alkylene group, for example, an ethylene group, a propylene group, a butylene group, etc., R ⁵ is a divalent alkylene group, for example, a group exemplified as R ⁴ or a divalent allylene group, For example, -C ₆ H _4- , -C ₆ H ₄ -C ₆ H _4- , -C ₆ H ₄ -CH ₂ -C ₆ H _4- , -C ₆ H ₄ -CH (CH ₃ ) -C ₆ H ₄ -and so on. Preferred examples of the Y group are as follows: -CH ₂ CH _2- , -CH ₂ CH ₂ CH _2- , -CH ₂ CH (CH ₃ ) CH ₂ -,-(CH ₂ ) ₄ -,-(CH ₂ ) ₂ CO-,-(CH ₂ ) ₃ NHCO-,-(CH ₂ ) ₃ NHCONHC ₆ H ₄ CO- or-(CH ₂ ) ₃ -OOCNHC ₆ H ₄ NHCO-. Particularly preferred Y groups are divalent alkylene groups, -CH ₂ CH _2- , -CH ₂ CH ₂ CH _2- , -CH ₂ CH (CH ₃ ) CH ₂ -and the like, but -CH ₂ CH (CH ₃ ) CH _2- Most preferred.

Preferred specific examples of the silicone-based block copolymer of component (b) of the present invention can be illustrated by the following formula (2):

.

.

In said formula, e is an integer of 1-600, f is a number of 0.1-20, g and h are each an integer of 1-60, i represents an integer of 2-50, fxi is at least 1 or more.

Further specific examples of the silicone block copolymer as component (b) of the present invention include, for example, those of the following formulas (3) to (6):

.

.

In addition, the molecular weight of the silicone block copolymer as component (b) of the present invention is 5,000 to 2,000,000, preferably 10,000 to 1,500,000, more preferably 20,000 to 1,000,000. If it is 5,000 or less, the effect of giving a straight feeling or smoothness to a hair cannot be fully acquired. Commercially available products of the silicone block copolymers used in the present invention include SILSTYLE 401 (manufactured by Torre Dow Corning Silicon, former company name: Nihon Unika).

Moreover, although the compounding quantity of the component (b) in the hair cosmetic of this invention is not specifically limited, As a pure component, Preferably it is 0.01 to 20%, Especially preferably, it is 0.1 to 10%. If it is this range, by using together with component (a), it does not feel the uncomfortable feeling of sticking and greasy, and it is excellent in the effect which gives a straight feeling, and the effect of protecting hair damage, and makes it smooth and fluttering. The excellent thing which is excellent in the effect to make hair easy to prepare is obtained.

Hair cosmetics of the present invention, in addition to the essential components (a) and (b), in an quantitative and qualitative range that does not impair the effects of the present invention depending on the purpose, anionic surfactants, cationic surfactants, amphoteric surfactants, Surfactants such as nonionic surfactants; Emulsions such as ester oils, higher fatty acids, higher alcohols, hydrocarbons, and oils and fats; Silicones other than component (b); Water-soluble polymers such as natural water-soluble polymers, semi-synthetic water-soluble polymers, and synthetic water-soluble polymers; Aqueous components such as polyhydric alcohols, sugars and lower alcohols; Hair cosmetic ingredients such as amino acids, amino acid derivatives, peptides, peptide derivatives, plant extracts; Metal chelating agents such as edetate; PH adjusters such as citric acid, lactic acid, phosphoric acid or salts thereof; Perfumes, antiseptics, fungicides, ultraviolet absorbers, antioxidants, pigments, pigments and the like, and other ingredients commonly used in hair cosmetics or cosmetics in general can be blended.

In addition, the manufacturing method of the hair cosmetic of this invention is not specifically limited, It can manufacture by a conventional method, It is a liquid state, an emulsion state, a cream state, a gel state, and a mist (fog) state by combined use with another component, or the mechanism of a container. It can be implemented in various forms, such as a foam (foam) state. More specifically, it can be used as a shampoo, a hair rinse, a hair treatment, a hair pack, a hair lotion, a hair cream, a hair gel, etc., and also a propellant, such as liquefied petroleum gas, dimethyl ether, nitrogen gas, carbon dioxide gas, etc. It can also be used as an aerosol product, such as a hairspray and a hair foam (hair mousse), in addition to filling into the aerosol container. As a method of use, any of the methods such as applying to the hair and then washing it off or applying to the dry hair can be applied.However, it is possible to wash and remove hair lotion, hair cream, hair gel and hair mousse. Hair cosmetics are preferred because the expression of the effect is clearer.

The hair cosmetic of the present invention thus obtained is excellent in the effect of preventing hair damage while giving a straight feeling, and the effect of making the hair smooth and easy to trim. This effect is further increased by the continuous use of the hair cosmetic composition of the present invention, and is maintained for a long time. The period of continuous use also varies depending on the composition, formulation, amount used, and the quality of the hair applied.However, in the case of a type of rinse-off, such as a shampoo, it is preferable to use it once a day for two weeks or more, and to remove the type of hair lotion and the like. In the case of, it is preferable to use it continuously for one week or more once a day. Moreover, it is more preferable to use together the thing of the type to wash away, and the type of not to wash away more.

BRIEF DESCRIPTION OF THE DRAWINGS The photograph which compared the state of the hair bundle before and after the process by the hair dressing produced in Example 1 with the unprocessed hair bundle (blank), respectively.

An Example is given to the following and this invention is further demonstrated to it. In addition, these do not limit this invention at all.

Example  1 to 5 and Comparative example  1 to 4: Dressing fee

A hair dressing was prepared with the composition shown in Table 1 and the following manufacturing method.

For each sample of the obtained hair dressing, in the following evaluation method 1, the results of evaluating (a) the effect of providing a straight feeling, (b) preventing damage to the hair, (c) the smoothness and (d) the goodness of trimming were evaluated. Weapon on

(Composition and result)

  (ingredient) (%) Example Comparative example One 2 3 4 5 One 2 3 4 (1) Methylphenylpolysiloxane 2 2 2 2 2 2 2 2 2 (2) behenyl alcohol One One One One One One One One One (3) cetanol One One One One One One One One One (4) alkyltrimethylammonium chloride One One One One One One One One One (5) distearyl dimethylammonium chloride 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 (6) acetylcysteine 0.05 0.2 0.1 0.5 One 10 2 - 0.5 (7) PEG-60 Butyl Amodimethicone Emulsion (Note 1) 2 5 10 20 40 - 0.1 80 - (8) aminoethylaminopropylsiloxane copolymer emulsion (Note 2) - - - - - - - - 20 (9) propylene glycol 10 10 10 10 10 10 10 10 10 (10) preservative Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity (11) spices Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity Quantity (12) purified water Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount Remaining amount (Evaluation item and judgment) (A) Straightening effect ○ ◎ ○ ◎ ◎ ◎ ◎ × ○ (B) hair damage prevention effect ◎ ◎ ◎ ◎ ○ × × ◎ ○ (C) smoothness ○ ◎ ◎ ◎ ○ × × △ △ (ㄹ) orderly goodness ○ ◎ ○ ◎ ◎ ◎ ◎ △ × Note 1: SILSTYLE 401 (manufactured by Nihon Unika Co., Ltd.) (21.5% aqueous solution) Note 2: SM8904C (manufactured by Torre Dow Corning, Silicon) (pure ingredient: 40%)

(Production method)

A. The components (1) to (5) are dissolved by heating.

B. Components (9) to (12) are dissolved by heating.

C. The said A is added to said B, it is emulsified and mixed uniformly, and components (6)-(8) are added after cooling.

D. The said C was filled into the container and the hairdressing charge was obtained.

(Evaluation method 1)

<Evaluation of straight feeling, hair damage prevention effect, curling, elasticity giving effect, orderly goodness evaluation>

After washing hair with commercial shampoo and wiping water with 20 Japanese panelists in the 20s of curly hair who did not perform chemical treatment such as cold permanent or bleach (bleaching), there was nothing on the left half of hair Without applying (blank), two samples each of Examples 1 to 5 and Comparative Examples 1 to 4 were applied to the right half of the hair and then dried with a dryer while combing with a comb for 1 minute. The method from the shampoo to drying is carried out once daily for 5 days, and the left half is applied for (a) straightening effect, (b) hair damage prevention effect, (c) smoothness, and (d) smoothness. It evaluated using the following evaluation criteria compared with the hair (blank) of. This was also done for the other samples, and the average value of the ratings of each panel was determined according to the following criteria.

<Evaluation Criteria>

(A) Straightening effect (Evaluation standard) (Judgment) There is a feeling of straightness, there is a feeling of straightness, there is a feeling of straightness, there is almost no feeling of straightness, and there is a tendency for the hairs to be tangled. 4 3 2 1 (B) hair damage prevention effect (Evaluation standard) (Judgment) No damage, very gloss No damage, no gloss Somewhat damage, not much gloss Damaged, no gloss at all 4 3 2 1 (C) smoothness (Evaluation standard) (Judgment) Very smooth Smoothness Not very smooth Smoothly not smooth 4 3 2 1 (ㄹ) orderly goodness (Evaluation standard) (Judgment) Very good ordered Good ordered Not very tidy Untidy 4 3 2 1

<Decision Criteria>

(Average of all panel ratings) (Judgment) Average score 3.5 or more Average score 2.5 or more Less than 3.5 Average score 1.5 or more Less than 2.5 Average score less than 1.5 ◎ ○ △ ×

As apparent from the results of Table 1, the hair dressing materials of the present invention are all excellent in the effect of imparting a sense of straightness compared to those of Comparative Examples 1 to 4, and whiff of the hair, while excellent in preventing hair damage, It is found that the effect of making the hair smooth and smooth and ordered is excellent.

(Evaluation method 2)

About the said Example 1, the effect of providing a feeling of straightness and the goodness of trimming were also evaluated. Using two bundles of hair with a bundle of about 30 cm and 10 g of a curly Japanese woman in their twenties who did not undergo any chemical treatment such as cold permanent or bleach, washed with a commercial shampoo and wiped dry with a towel. Thereafter, one bundle was blanked and 2 g of the sample of Example 1 was applied to the other bundle of hair. Thereafter, both hairs were dried with a dryer while combing with a comb for 1 minute. The process from this shampoo to drying was repeated five times.

The effect of giving a feeling of straightness and the feeling of trimming were visually evaluated. The state of the hair bundle before a process and the state of the hair bundle after apply | coating a sample 5 times and processing are shown in FIG.

As is apparent from FIG. 1, it can be seen that the hair dressing material of Example 1 is excellent in the feeling of providing a straight feeling, the spread of the hair bundle is small, and the trimming property is improved by using this clearly compared to the blank.

Example  6: shampoo

Shampoo was prepared by the composition and preparation shown below.

(Furtherance)     (ingredient) (%) (1) PEG-60 butylamodimethicone emulsion (Note 1) (2) polyoxyethylene (3E.O.) lauryl ether sodium sulfate (3) sodium tetradecenesulfonic acid (4) N- palm oil fatty acid acyl -L-glutamic acid triethanolamine (5) Palm oil fatty acid amidepropyl dimethylaminoacetic acid beta (6) Palm oil fatty acid diethanol amide (7) Distearate ethylene glycol (8) Cationic cellulose (9) Propylene glycol Cole (10) Sodium Chloride (11) Disodium Edetate (12) Acetylcysteine (13) Preservatives (14) Fragrances (15) Purified Water 10.0 12.0 2.0 7.0 1.0 5.0 0.5 0.2 1.8 0.8 0.2 0.5 Proper quantity remaining

(Production method)

A. The components (1) to (15) are mixed uniformly.

B. The A was filled in a container to obtain a shampoo.

The shampoo of Example 6 was a shampoo having a very high effect of preventing hair damage and having a good straight feeling, shiny, smooth and smooth hair.

Example  7: hair treatment  Lotion

A hair treatment lotion was prepared by the composition and preparation shown below.

(Furtherance)     (ingredient) (%) (1) PEG-60 butylamodimethicone emulsion (Note 1) (2) 1,3-butylene glycol (3) Glycerin (4) Trimethylglycine (5) Xanthan gum (6) Acetylcysteine (7) Stearyltrimethylammonium Chloride (8) Cetyltrimethylammonium Chloride (9) Methylphenylpolysiloxane (10) Propylene Glycol (11) Ethanol (12) Preservatives (13) Fragrances (14) Purified Water  5.0 2.0 1.0 1.0 0.01 0.2 0.4 0.1 1.0 0.2 20.0 Proper quantity remaining

(Production method)

A. The components (1) to (6) and (14) are mixed and dissolved.

B. The components (7) to (13) are mixed and dissolved.

C. Add said B to said A, and mix uniformly.

D. The above C was filled into a mist dispenser container to obtain a hair treatment lotion.

The hair treatment lotion of Example 7 obtained as mentioned above can be used favorably on hair in a mist state, and it is excellent in the effect which protects hair damage, and has a favorable straightness and glossiness, and smoothness It was what had the outstanding effect as a hair treatment lotion of the effect made into. Moreover, when used day after day, a feeling of straightness was felt more.

Example  8 : hair  conditioner for hair( hair conditioner )

The hair conditioner was prepared with the composition and the manufacturing method shown below.

(Furtherance)     (ingredient) (%) (1) PEG-60 butylamodimethicone emulsion (Note 1) (2) cetyl alcohol (3) stearyl alcohol (4) stearic acid hardened castor oil (5) myristic acid isopropyl (6) polyoxyethylene ( 20E.O.) Cured Castor Oil (7) Distearyl Dimethylammonium Chloride (8) Stearyl Trimethylammonium Bromide (9) Cationized Guar Gum (10) 1,3-Butylene Glycol (11) Preservative ( 12) Amino modified silicone (Note 3) (13) Acetyl cysteine (14) Fragrance (15) Purified water  3.0 2.0 2.0 1.0 1.0 1.0 2.0 2.0 0.05 10.0 Quantity 2.0 1.0 Quantity remaining Note 3: The compounding quantity in SM8704C (40% emulsion) (product of Torre Dow Corning) is the pure component value of amino modified silicone

(Production method)

A. The components (2) to (8) are dissolved by heating.

B. Some of the components (9) to (11) and (15) are dissolved by heating.

C. The said A is added to the said B, it is emulsified and mixed uniformly, and after cooling, the (13) melt | dissolved in the remainder of components (1), (12), (14) and (15) is added.

D. The above C was charged to a container to obtain a hair conditioner.

The hair conditioner of Example 8 has an excellent effect as a hair conditioner having an excellent effect of preventing hair damage, an effect of imparting a straight feeling, and a high effect of making hair shiny, smooth and orderly. Was. Moreover, it was favorable that a straight feeling was felt more by using day after day.

Example  9: Hair gel

Hair gel was prepared by the composition and preparation shown below.

(Furtherance)     (ingredient) (%) (1) PEG-60 butylamodimethicone emulsion (Note 1) (2) carboxyvinyl polymer (3) polyvinylpyrrolidone (4) glycerin (5) sodium hydroxide (6) sodium alginate (7) ethanol (8 ) Stearyl Trimethylammonium Chloride (9) Dimethylpolysiloxane (10) Preservatives (11) Acetylcysteine (12) Fragrances (13) Purified water 10.0 0.5 3.0 1.0 Accumulation 0.5 20.0 0.2 1.0 Accumulation 0.1 Accumulation Remaining

(Production method)

A. Components (1), (2) and (6) are uniformly mixed with a part of component (13).

B. Components (3) and (4) are uniformly mixed with a part of component (13).

C. The components (7) to (10) are mixed and dissolved.

D. A part of components (5) and (13) is mixed and dissolved.

E. The said A, B, and C are mixed and melt | dissolved, and the said D is further added.

F. (11) and (12) which melt | dissolved in the remainder of (13) are added to said E, and it mixes.

G. The F was filled into a container to obtain a hair gel.

In addition to the hairstyling power as a hair gel, the hair gel of Example 9 was excellent in the effect of preventing hair damage, having an excellent straight feeling, shiny, smooth, and smooth hair.

According to the present invention, it is possible to obtain a hair cosmetic having an excellent effect of preventing hair damage while providing a straight feeling and having an effect of making the hair smooth and easy to trim.

Claims (1)

A hair cosmetic comprising the following components (a) and (b): (a) 0.05-1.0 mass% of acetylcysteine; And (b) a silicone-based block copolymer represented by Formula 1 below: [Formula 1]

[Wherein, R ¹ independently of one another represents a monovalent hydrocarbon group, hydroxyl group or alkoxy group which does not contain aliphatic unsaturation, X ¹ represents a general formula: -R ³ -Z ¹ (wherein R ³ is a direct bond or carbon A divalent hydrocarbon group having 1 to 20 atoms, Z ¹ represents an amino group-containing group or an ammonium group-containing group), R ² independently of each other, represents either R ¹ or X ¹ , and n Is an integer of 2 to 4, a is an integer of at least 1, c is an integer of at least 2, d is an integer of at least 2, bxd is at least 1, and Y is adjacent silicon by carbon-silicon A divalent organic group bonded to an atom and bonded to a polyoxyalkylene block by an oxygen atom, wherein the average molecular weight of each siloxane block is about 250 to about 1,000,000, and the average of each polyoxyalkylene block Molecular weight is from about 200 to about 10,000, the siloxane blocks constitute from about 25 to about 95% by weight of the copolymer, and the block copolymer has an average molecular weight of at least about 5,000.

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