JP2012240961A - Cosmetic composition for scalp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cosmetic composition for the scalp, which has excellent operability in application to the scalp, suppresses stickiness of the scalp and controls roughness of the hair even if attached to the hair.SOLUTION: The cosmetic composition for the scalp comprises a carboxyvinyl polymer, hyaluronic acid or its derivative and a lower alcohol and has a viscosity at 25°C of 200-1,000 mPa s to solve the problem. Preferably the cosmetic composition for the scalp comprises a plant extract and a nonionic surfactant.

Description

  The present invention relates to a cosmetic composition for scalp that has good operability when applied to the scalp, can suppress the stickiness of the scalp, and can suppress the roughness even when attached to hair.

  In recent years, various scalp cosmetics containing various active ingredients have been developed in order to improve the condition of the scalp (for example, Patent Document 1).

  In scalp cosmetics, water is generally used as a solvent to dissolve or disperse each component. However, in scalp cosmetics that use only water as a solvent, it is suitable for drying after application to the scalp. It takes a considerable amount of time. Therefore, for example, a lower alcohol such as ethanol is mixed to shorten the drying time after the scalp cosmetic is applied to the scalp.

  However, if the amount of the lower alcohol is increased, the surface tension of the scalp cosmetic is lowered, so that when applied to the scalp, the cosmetics for scalp are applied well to a desired site. It becomes difficult.

  Therefore, a thickener for increasing the viscosity may be used in a scalp cosmetic using a lower alcohol. However, when a scalp cosmetic containing a lower alcohol and a thickener is applied to the scalp, the scalp tends to be sticky. In addition, when applying scalp cosmetics to the scalp, it is difficult to avoid adhesion to the vicinity of the hair roots, but if scalp cosmetics containing a large amount of lower alcohol adhere to the hair, the hair will be stiff. There is also a problem of sticking.

  For example, Patent Document 2 proposes a technique for enhancing the smoothness of hair by further blending a polyether-modified silicone having a specific structure in a hair cosmetic with an increased amount of ethanol. However, the cosmetic described in Patent Document 2 is for hair, and cannot be said to have an appropriate composition as a cosmetic for scalp.

JP-A-2005-53784 JP 2007-63248 A

  The present invention has been made in view of the above circumstances, and its purpose is that operability when applied to the scalp is good, the stickiness of the scalp can be suppressed, and even if it adheres to the hair, it is not stiff. It is providing the cosmetic composition for scalp which can be suppressed.

  The cosmetic composition for scalp of the present invention that can achieve the above object is formulated with a carboxyvinyl polymer, hyaluronic acid or a derivative thereof, and a lower alcohol, and has a viscosity at 25 ° C. of 200 to 1000 mPa · s. It is characterized by this.

  According to the present invention, there is provided a cosmetic composition for scalp having good operability when applied to the scalp, capable of suppressing the stickiness of the scalp, and capable of suppressing the roughness even when attached to the hair. be able to.

  The scalp cosmetic composition of the present invention is formulated with a lower alcohol in order to shorten the drying time after application to the scalp, which reduces the viscosity of the scalp cosmetic composition and improves operability. There is a risk that the hair may be lowered or the hair to which the cosmetic composition for scalp is attached becomes stiff.

  Therefore, in the scalp cosmetic composition of the present invention, it was decided to combine carboxyvinyl polymer and hyaluronic acid or a derivative thereof in combination. By blending these in combination, it is easy to adjust the viscosity of the cosmetic composition for the scalp, and it suppresses dripping when applied to the scalp and ensures good operability such that it easily stretches on the scalp surface during application. In addition, it is possible to suppress stickiness of the scalp and hair stiffness.

  The blending amount of the carboxyvinyl polymer in the scalp cosmetic composition is combined with hyaluronic acid or a derivative thereof to adjust the viscosity of the scalp cosmetic composition to the value described later, and to ensure the above effects satisfactorily. Therefore, the content is preferably 0.01% by mass or more and 0.3% by mass or less.

  Hyaluronic acid or a salt thereof according to the cosmetic composition for scalp of the present invention is a component that contributes to ensuring the above-mentioned effects by combining with a carboxyvinyl polymer, and also contributes to improving the moisture retention of the scalp. That is, the moist feeling of the scalp can be enhanced by treating with the scalp cosmetic composition of the present invention.

  Examples of hyaluronic acid or derivatives thereof that can be used in the scalp cosmetic composition of the present invention include hyaluronic acid, hyaluronic acid salts (sodium salt, potassium salt, etc.), acetyl hyaluronic acid salt, and cationized hyaluronic acid. Only one of these may be used, or two or more may be used in combination. Among these, hyaluronate is more preferable.

  The amount of hyaluronic acid or a derivative thereof in the scalp cosmetic composition is combined with a carboxyvinyl polymer to adjust the viscosity of the scalp cosmetic composition to the value described later, and to ensure the above-mentioned effect satisfactorily. Therefore, the content is preferably 0.01% by mass or more and 0.06% by mass or less.

  Examples of the lower alcohol that can be used in the scalp cosmetic composition of the present invention include alcohols having 2 to 4 carbon atoms such as ethanol, isopropanol, and butanol, and only one of them may be used. Two or more kinds may be used in combination. Among these, ethanol is more preferable.

  The blending amount of the lower alcohol in the scalp cosmetic composition is preferably 5% by mass or more from the viewpoint of satisfactorily securing the effect (the effect of shortening the drying time after being applied to the scalp). However, if the amount of the lower alcohol in the scalp cosmetic composition is too large, the scalp may be strongly irritated, so the blending amount is preferably 50% by mass or less.

  The cosmetic composition for scalp of the present invention preferably contains, for example, a plant extract as a component for improving the state of the scalp. Specific examples of plant extracts include, for example, Tokisenka extract, bitter orange peel extract (spruce extract), Clara extract, ginger (Ginger) extract, licorice extract, Arnica extract, ginkgo extract, nettle extract, fennel extract, eel Extract, gypsophila extract, chamomile extract, carrot extract, chlorella extract, mulberry extract, pop extract, gentian extract, sage extract, assembly extract, carrot extract, mugwort extract, butcher bloom extract, roman chamomile extract, asenya extract, tea leaves Extract, clove extract, clam extract, jojoba leaf extract, eucalyptus leaf extract, bitumen extract, melissa extract, diatom extract, persimmon extract, perilla extract, tonin extract, soybean extract, bi Leaf extract, button extract, thyme extract, Komeekisu and the like, may be used only one of these may be used in combination of two or more.

  The blending amount of the plant extract in the cosmetic composition for scalp (the blending amount in a pure amount excluding the extraction solvent, etc., hereinafter the same) is 0.0001% by mass from the viewpoint of ensuring the effect of its use satisfactorily. The above is preferable, and 0.0003% by mass or more is more preferable. However, if the amount of the plant extract in the scalp cosmetic composition is too large, the specific odor derived from the plant extract may become strong, so the blending amount of the plant extract in the scalp cosmetic composition is The content is preferably 0.2% by mass or less, and more preferably 0.1% by mass or less.

  Moreover, it is preferable to mix | blend a nonionic surfactant with the cosmetic composition for scalp of this invention, and, thereby, it becomes possible to make the scalp after application | coating more moist touch.

  Specific examples of the nonionic surfactant include, for example, polyoxyethylene alkyl ether, sucrose fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid Ester, polyoxyethylene sorbit fatty acid ester, polyoxyethylene lanolin, polyoxyethylene lanolin alcohol, polyoxyethylene sorbit beeswax, polyoxyethylene castor oil, polyoxyethylene hydrogenated castor oil, polyoxyethylene sterol, polyethylene glycol fatty acid ester, propylene Examples include glycol fatty acid esters and lecithin. In addition, it is preferable that the average added mole number of ethylene oxide in each said nonionic surfactant is 2-50 mol. Examples of the polyoxyethylene alkyl ether include polyoxyethylene lauryl ether, polyoxyethylene cetyl ether, polyoxyethylene stearyl ether, polyoxyethylene oleyl ether, polyoxyethylene behenyl ether and the like. Furthermore, sucrose fatty acid ester, glycerin fatty acid ester, polyglycerin fatty acid ester, polyoxyethylene glycerin fatty acid ester, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, polyethylene glycol fatty acid ester, and propylene glycol fatty acid Examples of the fatty acid in the ester include undecylenic acid, lauric acid, palmitic acid, myristic acid, stearic acid, isostearic acid, oleic acid, behenic acid, linoleic acid, and the like. Only 1 type may be used for a nonionic surfactant among the above illustrations, and 2 or more types may be used together. Among these, polyoxyethylene hydrogenated castor oil is particularly preferable in that the effect of improving the state of the scalp after application is better.

  The blending amount of the nonionic surfactant in the scalp cosmetic composition is preferably 0.01% by mass or more, and preferably 1% by mass or more, from the viewpoint of ensuring a good effect due to its use. More preferred. However, if the amount of the nonionic surfactant in the scalp cosmetic composition is too large, the hair and scalp tend to be sticky, so the nonionic surfactant in the scalp cosmetic composition Is preferably 5% by mass or less, and more preferably 3% by mass or less.

  The scalp cosmetic composition of the present invention uses water as a solvent together with a lower alcohol. When the cosmetic composition for scalp uses lower alcohol and water as a solvent, the total amount of these solvents is preferably, for example, 80 to 90% by mass.

  In the cosmetic composition for scalp of the present invention, in addition to the above-described components, various components blended in known cosmetics may be blended as necessary within the range not impairing the effects of the present invention. it can. Examples of such components include polyhydric alcohols, amino acids or derivatives thereof, nucleic acids or derivatives thereof, sugars, vegetable oils, vitamins, pH adjusters, preservatives, and fragrances.

  The scalp cosmetic composition usually adjusts the pH to an acidic range (7 or less). Therefore, in the scalp cosmetic composition, it is preferable to use a pH adjuster as necessary. Specific examples thereof include acids such as citric acid, phosphoric acid, malic acid, tartaric acid, and lactic acid; ammonia, Alkaline agents such as sodium hydroxide, triethanolamine, arginine, 2-amino-2-methyl-1-propanol;

  The cosmetic composition for scalp of the present invention has a viscosity at 25 ° C. from the viewpoint of preventing dripping when applied to the scalp and improving the operability so that it can be applied satisfactorily to a desired location. It is 200 mPa · s or more, and preferably 400 mPa · s or more. In addition, the cosmetic composition for scalp of the present invention has a viscosity at 25 ° C. of 1000 mPa · s or less and 800 mPa from the viewpoint of improving the operability so that it is satisfactorily stretched on the surface of the scalp when applied. -It is preferable that it is below s. The viscosity of the scalp cosmetic composition of the present invention can be adjusted by adjusting the amount of each of the above components.

  The viscosity of the scalp cosmetic composition in this specification is the liquid temperature of a scalp cosmetic composition filled in a 100 ml screw tube using a No. 1 rotor or a No. 2 rotor using a B-type viscometer. It is a value obtained by measurement under the conditions of 25 ° C., measurement time 60 seconds, and rotation speed 12 rpm.

  Although there is no restriction | limiting in particular about the dosage form of the cosmetic composition for scalp of this invention, Usually, it is set as a lotion form, a gel form, etc.

  When using the cosmetic composition for scalp of the present invention, for example, an appropriate amount of the cosmetic composition for scalp may be applied to the scalp and stretched by hand. In addition, it is preferable to massage the scalp to which the cosmetic composition for scalp is applied, whereby the effect of improving the state of the scalp is more effectively exhibited.

  Hereinafter, the present invention will be described in detail based on examples. However, the following examples do not limit the present invention. In Tables 1 and 2 below, the blending amount of each component is shown in% so that the scalp cosmetic composition as a whole is 100%. And in Table 2, the display of% is abbreviate | omitted and it displays only with the numerical value showing a compounding quantity.

Examples 1-5 and Comparative Examples 1-5
The cosmetic compositions for scalp of Examples 1 to 5 and Comparative Examples 1 to 5 were prepared with the compositions shown in Tables 1 and 2.

  Each of the cosmetic compositions for scalp of Examples 1 to 5 and Comparative Examples 1 to 5 (each 1 ml) was applied to the scalp by each of seven professional evaluators, the ease of application to the scalp, the scalp With respect to the non-stickiness and the non-stickiness of the hair, scoring was performed in five stages from 1 to 5 so that a higher score could be obtained when the evaluation was better. And the score of all the evaluators was totaled (35 points maximum), and it was set as evaluation of each cosmetic composition for scalp. The ease of application of the scalp cosmetic composition to the scalp was evaluated for both the presence or absence of dripping when applied to the scalp and the good elongation on the scalp surface, both of which were good. If it is, we gave a higher score. These results are shown together in Tables 1 and 2 together with the viscosity of each scalp cosmetic composition.

  In Tables 1 and 2, the numerical values expressed in percentage in parentheses in the “carboxyvinyl polymer aqueous solution”, “sodium hyaluronate A aqueous solution”, “sodium hyaluronate B aqueous solution”, “hydroxyethyl cellulose aqueous solution” and “aqueous solution of pullulan” Each means a concentration based on these masses. In Tables 1 and 2, “sodium hyaluronate A” has a molecular weight of about 2 million, and “sodium hyaluronate B” has a molecular weight of about 1.5 million.

  Furthermore, the “bitter orange peel extract” in Tables 1 and 2 is a composition containing 3.36% by mass of the bitter orange peel extract, and the balance is water and ethanol. In Tables 1 and 2, the composition is The blending amount is shown. In addition, “Clara extract” in Tables 1 and 2 is a composition containing 1% by mass of Clara extract, and the balance is 1,3-butylene glycol and water. In Tables 1 and 2, as the composition, Is shown. Furthermore, “Tokin-Senka extract” in Tables 1 and 2 is a composition containing 1% by weight of Tonkin-Senka extract, and the balance is 1,3-butylene glycol. In Tables 1 and 2, as the composition, Is shown.

  In Tables 1 and 2, “POE” in “POE (40) hydrogenated castor oil” is an abbreviation for polyoxyethylene, and the numerical value in parentheses thereafter is the average number of moles of ethylene oxide added. Furthermore, in Tables 1 and 2, the “appropriate amount” in the column of “2-amino-2-methyl-1-propanol” means that the scalp cosmetic composition was used in an amount such that the pH was 6. ing. Moreover, in Table 1 and Table 2, “the total is 100” in the column of purified water means that the amount of purified water is added to the total amount of each component other than purified water constituting the cosmetic composition for scalp. It means that it was made to become 100%.

  Furthermore, "-" in the column of "Viscosity" in Comparative Example 4 of Table 2 means that the viscosity of the scalp cosmetic composition was too low to measure the viscosity.

  As shown in Table 3, the cosmetic compositions for scalp of Examples 1 to 5 are less likely to sag when applied to the scalp, have good elongation on the scalp surface, are easy to apply to the scalp, have good operability, and , Stickiness of the scalp and hair stiffness are suppressed. Moreover, the scalp which applied the cosmetic composition for scalp of Example 5 which mix | blended the nonionic surfactant has a moist feeling compared with the case where the cosmetic composition for scalp of Examples 1-4 is apply | coated. It was better.

  On the other hand, the cosmetic composition for scalp of Comparative Example 1 in which hyaluronic acid or a derivative thereof is not blended cannot sufficiently suppress hair stiffness after application. Moreover, the cosmetic composition for scalp of Comparative Example 2 in which no carboxyvinyl polymer was blended had low viscosity, and dripping occurred when applied to the scalp. Further, Comparative Example 3 and Comparative Example 4 are examples in which other thickeners were used in place of the carboxyvinyl polymer and hyaluronic acid or derivatives thereof. Of these, the scalp of Comparative Example 3 using hydroxyethyl cellulose was used. The cosmetic composition cannot sufficiently suppress the stickiness of the scalp and the hair after application. Moreover, the cosmetic composition for scalp of Comparative Example 4 using pullulan has a low viscosity, and dripping occurs when applied to the scalp. The effect of suppressing the stickiness of the scalp after application and the effect of suppressing the hair stiffness Is also inferior. Furthermore, the cosmetic composition for scalp of Comparative Example 5 is an example in which the viscosity is too high, but the elongation on the scalp surface when applied is poor, the operability is inferior, and the scalp stickiness suppressing effect after application is poor. In addition, the effect of suppressing hair stiffness is inferior.

Claims (6)

  A scalp cosmetic composition comprising a carboxyvinyl polymer, hyaluronic acid or a derivative thereof, and a lower alcohol, and having a viscosity at 25 ° C. of 200 to 1000 mPa · s.   The cosmetic composition for scalp according to claim 1, wherein the blending amount of the lower alcohol is 5 to 50% by mass.   The cosmetic composition for scalp according to claim 1 or 2, wherein the amount of the carboxyvinyl polymer is 0.01 to 0.3% by mass.   The cosmetic composition for scalp according to any one of claims 1 to 3, wherein the blending amount of hyaluronic acid or a derivative thereof is 0.01 to 0.06% by mass.   The cosmetic composition for scalp according to any one of claims 1 to 4, further comprising a plant extract.   The cosmetic composition for scalp according to any one of claims 1 to 5, further comprising a nonionic surfactant.