JPS59110612A - Hair treatment - Google Patents

Abstract

PURPOSE:To provide a treatment containing a hyaluronic acid having specific molecular weight, capable of restoring and protecting damaged hair, improving and keeping the set hair, and giving glossiness to the hair. CONSTITUTION:Hyaluronic acid having a molecular weight of 500,000-2,000,000 and/or its salt, especially preferably sodium hyaluronate is added to a hair treatment in an amount of 0.005-2wt%. The treatment is preferably the one containing 2-5wt% of humectant, 3-30wt% of lubricant (preferably 5-20wt% of polar lubricant or 5-30wt% of non-polar lubricant), 0-5wt% of surface active agent and 95-15wt% of water as essential components, and having a pH of 4-10, especially 5-9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel hair treatment agent containing hyaluronic acids, particularly sodium hyaluronate, which can restore and protect damaged hair, improve and maintain hair fixation, The present invention is characterized by providing hair treatment agents such as hair treatments, hair conditioners, hair sprays, and setting lotions that have the effect of imparting luster to hair.

Conventionally, hair treatment agents for restoring and protecting hair damaged by the use of permanent agents, hair dyes, bleaching agents, hair dryers, etc. mainly contain polypeptides and 2- Octyldodecanol, hexadecyl alcohol) v) Those containing oily components such as castor oil and olive oil are provided. The former hair treatment agent protects the hair by adsorbing polypeptide to the hair, but when the polypeptide necessary for sufficient protection of the hair is added to the base of the hair treatment agent, the amount of polypeptide added increases. In proportion to this, the hair treatment agent easily rots on the hair after being applied to the hair and produces a bad odor, making it impractical. In the latter hair treatment agent that uses 2-octyldodecanol, hexadecyl alcohol, etc. as an oily component, when applied to the hair, the treatment agent remains on the surface of the hair and can physically protect it from the external environment. Since it is not absorbed into the hair, it does not restore or protect the hair itself, and no fundamental solution has been found. In the case of hair treatment agents that contain oil-based ingredients such as castor oil or olive oil, the amount to be added to provide sufficient effects on the hair may cause stickiness on the hair or make the hair itself feel heavy. This greatly impairs the set properties of the hair.

On the other hand, hair treatment agents such as setting lotions and hair sprays, that is, hair fixing agents, have been provided that contain polyvinylpyrrolidone, carboxymethylcellulose, and acrylic acid resin as main ingredients.
Although hair is generally fixed, the resulting hair has a stiff finish and cannot provide a natural finish.

As a result of intensive research to solve the above-mentioned drawbacks of hair treatment agents and to obtain a hair treatment agent that is better than ever, the present inventor has developed a purified hyaluronic acid with a specific molecular weight, which is a type of acidic mucopolysaccharide. By stably and effectively containing it, they finally achieved the desired hair treatment agent.

The present invention relates to a novel hair treatment agent characterized by containing hyaluronic acid and/or its salts having a molecular weight of 500,000 to 2,000,000, particularly preferably sodium hyaluronate.

The hair treatment agent according to the present invention has a cream form,
Various dosage forms such as gel, solid, powder, and liquid are obtained. Furthermore, all hair treatment agents that are intended for hair treatment fall within the scope of the present invention, and include hair treatments, hair conditioners, hair sprays, setting lotions, and the like.

As mentioned above, the hyaluronic acid applied to the present invention has a molecular weight of 500,000 to 2,000,000, and is appropriately extracted from natural products (purified if necessary), but of course synthetic products may also be used.

Further, it may be a mixture as long as it does not impair the effect in the hair treatment agent, and can be in various forms such as a powder, a solution, and a jelly. If the molecular weight is less than 500,000, it is difficult to avoid using a large amount, and hyaluronic acid itself is expensive, making it difficult to put it to practical use.When used as a hair treatment agent, it tends to give a sticky feeling, so it is a good choice. It's not right.

If it exceeds 2 million, it is difficult to use because it forms a strong film on the hair and gives a strange feeling.

As salts of hyaluronic acid, sodium salts, potassium salts, basic amino acid salts, etc. are used.

In particular, hyaluronic acid sodium salt is in practical use, has significantly better solubility in aqueous systems than hyaluronic acid itself, and can provide about 4 to 5 times more moisture to hair. so it is used most effectively. (
Normally, it is said that hair requires a moisture content of 10 to 13%, and the hair treatment agent of the present invention can fully meet this purpose. ) The content of the above hyaluronic acids in the hair treatment agent is 0.005 to 2% by weight based on the total weight. If the content is higher than this, the hyaluronic acids remaining in the hair after treatment will form a hard film on the hair, which not only lacks affinity with the hair, but also causes the film to twist due to slight friction. In such a state, it becomes extremely useless as a hair treatment agent. Furthermore, since the protective film on the hair is difficult to form uniformly, the skin becomes partially peeled off and peels off like dandruff when brushed. On the other hand, if the content of hyaluronic acids is low, sufficient effects of hyaluronic acids cannot be expected.

The hair treatment agent containing hyaluronic acids according to the present invention includes:
Usually, at least 0 to 10 moisturizers are used as hair treatment ingredients.
% by weight (preferably 2 to 5% by weight), 3 to 30% by weight of oil, 0 to 5% by weight of surfactant, and 95 to 15% by weight of water, and further other cosmetic ingredients are added. It is preferable that

Humectants applicable to the present invention include glycols, saccharides, amino acids, lactic acid, sodium chloride, and the like. In particular, glycols such as glopylene glycol, 1,3-butylene glycol, and polyethylene glycol are effective as compatibilizers for hyaluronic acids and oils. It is preferably 2 to 5% by weight. Glycerin is difficult to use alone because it has extremely poor compatibility with hyaluronic acids and oil agents, and also has a feeling of tackiness on the hair. Examples of sugars include solpitol, mannitol, saccharose, fructose, xylitol, glycose, maltose, etc. Considering good affinity with hyaluronic acids, in the present invention 1 to 2% by weight of the total weight% is used.
degree is preferred.

The oils applicable to the present invention are those commonly used for hair cosmetics, such as hydrocarbons, highly absorbent fatty acids, higher alcohols, esters, glypeptides, silicone oils, etc. However, preferably hyaluronic acids, polar oils having high affinity with the glycols, such as esters such as isopropyl myristate and cetyl isooctanoate, and alcohols such as 2-octyldodecanol and hexadecyl alcohol. Non-polar silicone oils such as phenylmethylsiloxane and dimethylsiloxane are mentioned, and these have a plasticizing effect on hyaluronic acid, and good products can be obtained.Non-polar oils such as liquid paraffin and squalane are not used alone. Since it tends to inhibit the film-forming properties of hyaluronic acids, it is preferable to use them in combination with polar oils and adjust the amount to 30% by weight or less based on the total weight.Oils such as linoleic acid and oleyl alcohol, which have double bonds, Since it is easy to promote low polymerization of , a maximum weight ratio of 5 or less is appropriate.

The preferred content of the oil agent in the present invention is polar oil agent 5
-20% by weight, and about 5-30% by weight of non-polar oil.

As surfactants, cationic surfactants or amphoteric surfactants should be avoided because they sometimes form complexes with hyaluronic acid and are poorly stabilized in the system. Anionic activators and nonionic activators are preferably used, and those normally used for hair cosmetics may be used, but a range of 2 to 5% by weight based on the total weight is suitable. Specific surfactants include:
Polyoxyethylene higher alcohol ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester, glyceryl monofatty acid ester, polyoxyethylene castor oil derivative, polyoxyethylene sorbitol fatty acid ester, polyoxyethylene alkyl allyl ether, These include straight-chain or side-chain higher fatty acid soaps, higher alcohol ether sulfates, fatty acid alkylolamides, and the like.

In the present invention, it is preferable that the five components, which are the above-mentioned hyaluronic acid or its salts, a humectant, an oil agent, and a surfactant plus water, are required components, and that the range 1 is maintained at 4 to 10. This is because: below 4, hyaluronic acids decrease their solubility and become less polymerized, and at pH 10 or more, they become less effective due to hydrolysis, so the optimal pH range is between 5 and 9. .

■Adjustment can be done with a small amount of acid or alkali, and strong buffering capacity is not required. Phosphoric acid-based inorganic acids and their alkali salts, succinic acid, tartaric acid,
It is effective to use organic acids such as malic acid and their alkali salts in an amount of about 1% or less of the total weight.

Other main cosmetic ingredients that can be used in the hair treatment agent of the present invention include ultraviolet absorbers, alcohols, chelating agents, thickeners, and the like. As the ultraviolet absorber, urocanic acid type is preferable and when used in the range of 0.01 to 0.05% by weight, it is possible to significantly effectively prevent and stabilize the low polymerization of hyaluronic acids due to light. It should be noted that benzophenone type and benzoic acid type are used because they tend to have low viscosity. Examples of alcohols include ethanol, isopropyl alcohol, etc., and 20% by weight can be used to avoid aggregation and sedimentation of hyaluronic acids when administered orally. As a chelating agent, ethylenediaminetetraacetic acid and its alkali metal salts are useful for stabilizing hyaluronic acids. As the thickener, those commonly used in hair treatment agents may be used, and typical examples include carbopol carpoquine methylcellulose and sodium alginate.

In addition, the present invention contains fragrances, preservatives,
It goes without saying that cosmetic raw materials such as pigments, plasticizers, and neutralizing agents and medicinal ingredients (vitamin E nicotinate, pantotin, phosphoric acid derivatives, etc.) may be used as necessary.

Next, referring to the manufacturing method of the present invention, hyaluronic acids are added to a moisturizer in advance, then quickly dissolved in water, and then gradually added to the heated and dissolved oil and surfactant. After emulsifying at 70 to 80C, stirring thoroughly, cooling to below 500C and adding cosmetic raw materials such as fragrances, pigments, and preservatives, it is made into a product, or in a solution in which oils and surfactants are heated and dissolved. A moisturizer, neutralizer, and water were mixed and heated in advance, then gradually added, emulsified at 70 to 80 rpm, thoroughly stirred, and then heated to 50 tons. Next, cool the mixture, add cosmetic raw materials such as fragrances, pigments, and preservatives, and finally add hyaluronic acids dissolved in some water, taking care not to cause partial gelation due to poor dispersion of the hyaluronic acid. A method of producing a product is preferred.

Alternatively, when obtaining an aqueous gel type hair treatment agent, hyaluronic acid and/or its salts are added in advance to 10 to 10% of the total weight.
Disperse and dissolve in 20 g of water (heat at below 40 C if necessary), add this to a separately prepared water-soluble polymer solution with stirring, then add the remaining water and further A preferred method is to obtain an aqueous gel-type hair treatment agent by sequentially adding a moisturizer and an oil agent (if necessary, other cosmetic ingredients such as surfactants, alcohol, conditioning agents, preservatives, ultraviolet absorbers, etc.) .

If hyaluronic acid and/or its salts are simply mixed and dissolved in cosmetic ingredients, there is a high risk of temporary contact between the hyaluronic acid and the moisturizing agent or surfactant, resulting in a low viscosity phenomenon. Since hyaluronic acids are polymers, they require time to dissolve in water and tend to form partial gels (stable hair treatment agents cannot be obtained).

The same is true when water is preheated to a high temperature and hyaluronic acids are blended therein.

The hair treatment agent obtained as described above has a molecular weight of 500,000 to 500,000.
Due to the characteristics of 2 million hyaluronic acids, hair treatments, hair conditioners, etc., can be used to treat hair that has been physically damaged by permanent agents, hair dyes, hair dryers, etc. in an appropriate amount without causing rot or bad odor. By using the treatment agent of the present invention, it is possible to restore the hair naturally, as well as protect it, and in addition, it provides a natural finish feeling without stickiness or heavy feeling on the hair. .

In the case of hair treatment agents (fixing agents) such as hair fixing agents, setting lotions, and hair sprays, hair fixation is facilitated without causing the stiff feeling that results from the use of large amounts of hair fixing ingredients. At the same time, its retention is improved and it is possible to give shine to the hair.

In order to demonstrate whether the hair treatment agent using the hyaluronic acids of the present invention is superior in recovering and protecting damaged hair than ever before, the breaking strength of damaged hair was measured. For the measurement method, prepare a control solution using a 5% by weight aqueous solution of propylene glycol (untreated solution) and an aqueous solution containing 0.05% by weight of sodium hyaluronate (treated solution). . 1o female cut hair damaged (
Hair thickness diameter 0.07-0.08 mri, hair length 5
crrL) 10 pieces each were immersed in the above untreated solution and treated solution for 10 minutes, dried in a 20C1 silica gel desiccator day and night, set in a tensile strength tester (manufactured by Toyo Bold-In Co., Ltd.), and The breaking strength of the cut hair was measured. As a result, the hair immersed in the untreated solution was easily cut at a strength of 110 g, whereas the treated solution according to the present invention was not cut at a strength of 130 g. Also hair 1
Although there was some variation among individuals, all of them increased the strength. From this, it is clear that the treatment liquid improves the strength of the hair, and therefore, the hair treatment agent of the present invention contributes to the recovery and protection of the hair.

Next, Examples of the hair treatment agent of the present invention will be shown. The content ratio is based on weight.

Example 1 Bure Hair Treatment Liquid paraffin 30.0 Hexadecyl alcohol 5.0 Sorbitan monostearate 1.5 Propylene glycol 5.0 Carbopol 0.03 Sodium hyaluronate 0.4 (molecular weight 800,000) Hyaluronic acid 0.1 (Molecular weight 600,000) Water 56.4 Preservative
Appropriate amount Fragrance Example 2 Hair conditioner Liquid paraffin 20.0 Methylphenylboria 0 xane 5.0 Sorbitan monostearate 1.5 1.3-Butylene glycol 5.0 Carboquine methylcellulose 0.1 Sodium hyaluronate 0.05 (Molecular weight 600,000) Urocanic acid 0.05 water
66.75 Fragrance Appropriate amount Preservative Example 3 Hairs Gray Sodium Hyaluronate 0.4 (Molecular weight 1.3 million)
Ethanol 24.0 Water 15.4 Freon gas 60.0 Acrylic acid resin 0.2 Fragrance Appropriate amount Example 4 Sera ni lotion Pttrium hyaluronate 1.0 (molecular weight 80,000)
Ethanol 40.0 Propylene Glycol 10.0 Carboball 0.1 Water 43.9 Diimpropyl Adipate 5.0 Fragrance Appropriate amount Preservative Example 5 After Treatment Squalane 10.0 Inglobil Myristate 5.0 Sorbitan Monooleate 0. 5 polyoxyethylene stearate 1.5 stearic acid
0.5 Potassium 0.05 Sodium hyaluronate 0.1 (molecular weight 800,000) Butylene glycol 5.0 Urocanic acid 0.05 Water 77.3 Fragrance
Appropriate amount of preservative 100

Claims (2)

[Claims] (1) Hyaluronic acid with a molecular weight of 500,000 to 2 million and/or
or a hair treatment agent containing a salt thereof. (2) The hair treatment agent according to claim 1, wherein the salt of hyaluronic acid is hyaluronate sodium salt.