JP2014189528A - Hair cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hair cosmetics which can favorably straighten curls, kinks or the like of hair and has excellent temporal stability of pH.SOLUTION: The hair cosmetics contain (A) urea or hydroxyethyl urea, (B) phosphate and (C) water. Preferably, the hair cosmetics further contain (D) lower alcohol and (E) polyhydric alcohol.

Description

  The present invention relates to a hair cosmetic that can satisfactorily stretch the hair and has good pH stability over time.

  As a method for extending the hair habit, a chemical method such as straightening treatment is known. However, on the other hand, there is also a demand for a method of extending hair habit without using such chemical treatment. For example, Patent Document 1 addresses such needs by adding urea to hair cosmetics. This technique has been proposed.

  In addition, although the main purpose is not to stretch the hair, it is also practiced to add urea to the hair cosmetic for the purpose of imparting a moist feeling and softness to the hair (Patent Document 2).

  However, it is known that cosmetics formulated with urea are likely to change in pH over time, and particularly when stored in a relatively high temperature environment, the change is likely to occur (Patent Document 3). Since there is a possibility that the quality of the hair cosmetic composition may be impaired by changing the pH of the hair cosmetic composition, the hair cosmetic composition containing a component such as urea is also required to have improved pH stability over time.

JP 2007-176826 A JP 2000-86458 A JP 2003-95914 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hair cosmetic that can satisfactorily extend the habit of the hair and has good pH stability over time.

  The hair cosmetic composition of the present invention capable of achieving the above object is characterized by comprising (A) urea or hydroxyethylurea, (B) phosphate and (C) water. is there.

  ADVANTAGE OF THE INVENTION According to this invention, the hair cosmetics which can extend the habit of hair satisfactorily and have favorable stability over time of pH can be provided.

  The hair cosmetic composition of the present invention contains (A) urea or hydroxyethylurea as a component that ensures the function of extending hair habit. However, in cosmetics formulated with urea or hydroxyethyl urea, the pH of the cosmetics itself changes, especially when stored in a relatively high temperature environment of about 40 ° C. This is believed to be due to the decomposition of urea and hydroxyethylurea in the presence of water.

  As a result of extensive studies, the present inventor found that when (A) urea or hydroxyethylurea and (C) water is used together with (B) phosphate to constitute a hair cosmetic, it depends on the component (A). It has been found that changes in pH over time can be suppressed without impairing the action on the hair, and the present invention has been completed.

  For the component (A) of the hair cosmetic composition of the present invention, only one of urea and hydroxyethylurea may be used, or both may be used in combination. Among these, it is more preferable to use urea because the feel of the hair after the treatment can be made softer or the hair ends can be made more comfortable.

  Blending amount of urea or hydroxyethyl urea as component (A) in hair cosmetics [when both urea and hydroxyethyl urea are used in combination as component (A), the total amount thereof. The same applies hereinafter for the amount of component (A) in the hair cosmetic. ] Is preferably 0.1% by mass or more, and more preferably 2% by mass or more, from the viewpoint of better securing the effect of the use (the effect of satisfactorily extending hair combing). However, when there is too much quantity of (A) component in hair cosmetics, there exists a tendency for the touch of the hair after a process to fall easily. Therefore, the blending amount of urea or hydroxyethylurea as the component (A) in the hair cosmetic is preferably 10% by mass or less, and more preferably 5% by mass or less.

  As described above, the phosphate, which is the component (B) of the hair cosmetic, is a component for increasing the temporal stability of the pH of the hair cosmetic.

  Specific examples of the phosphate include disodium hydrogen phosphate, sodium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium dihydrogen phosphate, ammonium hydrogen phosphate, diammonium hydrogen phosphate, and the like. Only 1 type of them may be used and 2 or more types may be used together.

  The blending amount of the phosphate which is the component (B) in the hair cosmetic is 0.05% by mass or more from the viewpoint of better ensuring the effect (the effect of improving the stability with time of pH of the hair cosmetic). It is preferable that it is 0.1 mass% or more. However, when there is too much quantity of (B) component in hair cosmetics, there exists a tendency for the touch of the hair after a process to fall easily. Therefore, the blending amount of the phosphate which is the component (B) in the hair cosmetic is preferably 2% by mass or less, and more preferably 1% by mass or less.

  The hair cosmetic composition of the present invention contains (C) water as a medium. It is preferable that the compounding quantity of the water in hair cosmetics is 50-99 mass%.

  The hair cosmetic composition of the present invention preferably contains (D) a lower alcohol. Since lower alcohol has an action of promoting the penetration of urea and hydroxyethylurea, which are the component (A), into the hair cosmetics, the hair of the hair by the component (A) can be obtained. The effect of stretching the hair, the effect of increasing the softness of the hair, and the effect of improving the unity of the hair tips can be further enhanced.

  Specific examples of the lower alcohol include alcohols having 2 to 4 carbon atoms such as ethanol, isopropanol, and butanol, and only one of these may be used, or two or more may be used in combination. . Among these, ethanol is more preferable.

  Although the suitable compounding quantity of the lower alcohol which is (D) component in hair cosmetics changes according to the dosage form of hair cosmetics, it is preferable that it is 0.1-10 mass%, for example.

  Moreover, it is preferable that (E) polyhydric alcohol is mix | blended with the hair cosmetics of this invention. Since the polyhydric alcohol has the action of promoting the penetration of urea and hydroxyethylurea, which are the component (A), into the hair like the lower alcohol, by adding this to the hair cosmetic, (A ) The effect of extending hair habit by the component, the effect of increasing the softness of the hair, and the effect of improving the unitization of the hair tips can be further enhanced.

  Specific examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, polypropylene glycol, glycerin, diglycerin, 1,3-butylene glycol, and sorbitol.

  Although the suitable compounding quantity of the polyhydric alcohol which is (E) component in hair cosmetics changes according to the dosage form of hair cosmetics, it is preferable that it is 0.1-20 mass%, for example.

  Furthermore, it is preferable that the hair cosmetic composition of the present invention contains bisethoxydiglycol cyclohexanedicarboxylate. Cyclohexanedicarboxylic acid bisethoxydiglycol, like lower alcohols and polyhydric alcohols, has the effect of promoting the penetration of component (A) urea and hydroxyethylurea into hair. By blending in the preparation, it is possible to further enhance the effect of extending the hair habit of the component (A), the effect of increasing the softness of the hair, and the effect of improving the unitization of the hair tips.

  It is preferable that the compounding quantity of the cyclohexane dicarboxylic acid bisethoxy diglycol in hair cosmetics is 0.01-10 mass%, for example.

  Moreover, although various oil-based components can be mix | blended with the hair cosmetics of this invention, it is preferable to mix | blend surfactant as a dispersing agent of an oil-based component in this case. As the surfactant, any of a cationic surfactant, an anionic surfactant, a nonionic surfactant, and an amphoteric surfactant can be used.

  Specific examples of the cationic surfactant include, for example, monoalkyl type quaternary ammonium salts (lauryltrimethylammonium chloride, cetyltrimethylammonium chloride, stearyltrimethylammonium chloride, lauryltrimethylammonium bromide, cetyltrimethylammonium bromide, bromide Stearyltrimethylammonium), dialkyl quaternary ammonium salts (distearyldimethylammonium chloride, dicocoyldimethylammonium chloride, dicetyldimethylammonium chloride, etc.), benzalkonium type quaternary ammonium (benzalkonium chloride, stearyldimethylbenzyl chloride) Ammonium) and the like. Specific examples of the anionic surfactant include, for example, coconut oil fatty acid triethanolamine, coconut oil fatty acid potassium, polyoxyethylene lauryl ether acetic acid, sodium lauroyl glutamate, lauroyl methylalanine, coconut oil fatty acid methyl taurine sodium, tetradecene sulfone. Examples include sodium acid, sodium lauryl sulfate, polyoxyethylene lauryl ether sodium sulfate, dicetyl phosphate, dioleyl phosphate, polyoxyethylene lauryl ether phosphate, polyoxyethylene cetyl ether phosphate, polyoxyethylene oleyl ether phosphate, etc. .

  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 Fatty acid ester type nonionic surfactants such as polyoxyethylene sorbite fatty acid ester, polyethylene glycol fatty acid ester, propylene glycol fatty acid ester; polyoxyethylene lanolin; polyoxyethylene lanolin alcohol; polyoxyethylene sorbite beeswax; polyoxyethylene castor oil Polyoxyethylene hydrogenated castor oil; polyoxyethylene sterol; and the like. In addition, it is preferable that the average addition 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, examples of the fatty acid in the fatty acid ester type nonionic surfactant include undecylenic acid, lauric acid, palmitic acid, myristic acid, stearic acid, isostearic acid, oleic acid, behenic acid, and linoleic acid.

  Specific examples of amphoteric surfactants include amphoteric surfactants such as 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, sodium laurylaminopropionate, coconut oil alkylbetaine, laurylhydroxysulfobetaine, and the like. Agents; and the like.

  As the surfactant, only one of the above examples may be used, or two or more may be used in combination. Among these, nonionic surfactants are more preferable, fatty acid ester type nonionic surfactants are more preferable, and polyoxyethylene sorbitan fatty acid esters are particularly preferable.

  What is necessary is just to adjust the compounding quantity of surfactant in hair cosmetics suitably according to the use of hair cosmetics.

  In addition to the above-mentioned components, for example, various components blended in normal hair cosmetics can be appropriately blended in the hair cosmetic of the present invention as long as the effects of the present invention are not impaired. Such components include acyl amino acid esters, vegetable oils, waxes, hydrocarbons, silicones, protein hydrolysates, sterols and their esters, fatty acids, amino acids, preservatives, fragrances and the like.

  Specific examples of the acyl amino acid ester include, for example, N-lauroyl-L-glutamate di-2-hexyldecyl, N-lauroyl-L-glutamate diisostearyl, lauroylglutamate dioctyldodecyl, stearoylglutamate dioctyldodecyl, and the like.

  Specific examples of sterol and derivatives thereof include cholesterol, phytosterol, cholesteryl stearate, cholesteryl isostearate, cholesteryl hydroxystearate, cholesteryl oleate, dihydrocholesteryl oleate, phytosteryl isostearate, phytosteryl oleate, and the like.

  Specific examples of the fatty acid include lauric acid, myristic acid, palmitic acid, stearic acid, behenic acid, oleic acid, isostearic acid, 12-hydroxystearic acid, undecylenic acid and the like.

  Specific examples of amino acids include, for example, glycine, alanine, valine, leucine, isoleucine, serine, threonine, phenylalanine, tyrosine, tryptophan, cystine, cysteine, methionine, proline, hydroxyproline, aspartic acid, asparagine, glutamic acid, glutamine, arginine. Histidine, lysine, pyrrolidone carboxylic acid and the like.

  Specific examples of the preservative include, for example, benzoic acid and salts thereof (sodium salt and the like); paraoxybenzoic acid esters and salts thereof (sodium salt and the like) such as methyl paraoxybenzoate, propyl paraoxybenzoate and butyl paraoxybenzoate; Salicylic acid and salts thereof; sorbic acid and salts thereof; phenoxyethanol; methylisothiazolinone; methylchloroisothiazolinone / methylisothiazolinone;

  The pH of the hair cosmetic composition of the present invention is preferably 6-9. The pH of the hair cosmetic can be adjusted by the combination of the components used, and may be adjusted using a known acid or alkali as necessary.

  Although there is no restriction | limiting in particular regarding the dosage form of the hair cosmetics of this invention, From a viewpoint which promotes the penetration | permeation to the hair of urea or hydroxyethyl urea which is (A) component, it is preferable that it is a lotion shape.

  There is no restriction | limiting in particular about the use in the hair cosmetics of this invention, It can apply to hair cosmetics in general. Specifically, for example, shampoo, treatment, conditioner, rinse, permanent wave treatment agent, hair straightener, hair dye, styling agent, hair restorer, chemical treatment (permanent wave treatment, hair straightener treatment, hair dye treatment) Etc.) can also be used as a treatment constituting a part of a multi-drug treatment. And depending on the use, it may be a hair cosmetic that does not wash off after application to the hair, or a hair cosmetic that rinses off after application of the hair.

  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 to 3 below, the amount of each component is expressed in% so that the total amount of the hair cosmetics is 100%, but all the% is mass%, and the display of the% Is omitted, and only the numerical value indicating the blending amount is displayed. In this example, “%” is based on mass (mass%) unless otherwise specified.

Examples 1-5 and Comparative Examples 1-10
Hair cosmetics of Examples 1 to 5 and Comparative Examples 1 to 10 were prepared with the compositions shown in Tables 1 to 3, and each hair cosmetic was evaluated by the following method.

<Evaluation of hair growth after treatment, softness of hair, and bulkiness of hair ends>
Prepare a plurality of hair bundles 3.0 g made of comb hair collected from the same person, apply 1.0 g of the hair cosmetics of Examples 1 to 5 and Comparative Examples 1 to 10 to each hair bundle, And left for 15 minutes, rinsed with running water and dried with a dryer. For each hair bundle after drying, each of the three professional evaluators scored the hair growth, softness of the hair, and the degree of looseness of the hair according to the following evaluation criteria, The scores were summed up to evaluate each hair cosmetic.

(Evaluation criteria for hair growth, softness of hair, and looseness of hair ends)
Good: 2 points
Normal (no change): 1 point
Bad: 0 points.

<Stability of pH over time>
When the hair cosmetics of Examples 1 to 5 and Comparative Examples 1 to 10 were stored at room temperature for 1 month and stored at 50 ° C. for 1 month, the amount of change in pH before and after storage was determined. Evaluated according to.

(Evaluation criteria for the amount of change in pH before and after storage of hair cosmetics)
PH change range before and after storage is within 0.5: ○,
PH change range before and after storage is greater than 0.5 and less than 2.0: Δ,
PH change width before and after storage is 2.0 or more: ×.

  Each said evaluation result is written together in Table 1-3.

  In Tables 1 to 3, the “water” column has “total 100” means that the total amount of each component other than water constituting the hair cosmetic is 100% by adding the amount of water. It means that. In addition, “POE” of “POE (20) sorbitan monolaurate” shown in Tables 1 to 3 is an abbreviation of “polyoxyethylene”, and the numerical value in parentheses thereafter is the average number of moles of added ethylene oxide. is there. Further, "Produce 500" described in Tables 1 to 3 is a product of Ajinomoto Co., Inc., sodium pyrrolidone carboxylate, sodium lactate, arginine, aspartic acid, pyrrolidone carboxylic acid, glycine, alanine, serine, valine, proline, threonine. , Isoleucine, histidine and phenylalanine.

  From Tables 1 to 3, the following can be understood. The hair cosmetics of Examples 1 to 5 containing (A) urea or hydroxyethylurea, (B) phosphate, and (C) water had a change in pH before and after storage for 1 month at room temperature. The range of change in pH before and after storage at 50 ° C. for 1 month is small, the pH stability over time is excellent, and the elongation of the hair after treatment is also good. Furthermore, the hair cosmetics of Examples 1 to 4 using urea as the component (A) are softer than the hair cosmetic of Example 5 using hydroxyethyl urea as the component (A). The sheath of the hair ends is better.

  In contrast, (B) hair cosmetics of Comparative Examples 1, 3, and 4 that did not use phosphate, and (B) Comparative Examples 5 to 10 that use components such as phosphoric acid instead of phosphate. The hair cosmetics of No. 1 have a large pH change before and after storage for 1 month at room temperature and at least one of pH change before and after storage for 1 month at 50 ° C., and the pH stability with time is inferior. Yes. Similarly to the component (A), the hair cosmetic composition of Comparative Example 2 in which calcium pantothenate having an action of imparting softness to the hair is used in place of the component (A) is used to increase the growth of hair after treatment. Is inferior. In addition, in the hair cosmetics of Comparative Examples 3 and 4 in which calcium pantothenate was blended together with the component (A), precipitation occurred, and the form of the hair cosmetic itself was not good.

Claims (5)

  A hair cosmetic characterized by comprising (A) urea or hydroxyethyl urea, (B) phosphate and (C) water.   The hair cosmetic according to claim 1, wherein (D) a lower alcohol is further blended.   The hair cosmetic according to claim 1 or 2, further comprising (E) a polyhydric alcohol.   The hair cosmetic composition according to any one of claims 1 to 3, wherein the amount of (A) urea is 0.1 to 10% by mass.   (B) The amount of phosphate is 0.05-2% by mass, Hair cosmetic according to any one of claims 1-4.