JP5709467B2 - shampoo - Google Patents

Description

  The present invention relates to a shampoo that has good operability and foam quality and can improve the feel of the hair after washing.

  In general, amphoteric surfactants, anionic surfactants, and the like are blended as main ingredients in shampoos. Alkyl sulfates and polyoxyethylene alkyl ether sulfates have been widely used as anionic surfactants used in shampoos, but in recent years they have relatively low irritation and high safety. Studies have been made on the use of acylamino acids and salts thereof known as ingredients that can improve the feel of hair (for example, Patent Documents 1 to 4).

JP-A-1-294798 JP 2001-140000 A Special table 2003-521570 gazette JP 2010-138075 A

  By the way, shampoo is generally applied to hair for hands, but if the viscosity of shampoo is too low, it spills from the hand and cannot be applied well. Therefore, shampoos are required to improve operability with an appropriate viscosity. For example, a shampoo using an alkyl sulfate or polyoxyethylene alkyl ether sulfate as an anionic surfactant is easy to increase the viscosity, so that it is easy to obtain a viscosity that provides good operability.

  However, a shampoo using an acylamino acid or a salt thereof has a low viscosity, and when a separate thickener is applied to increase the viscosity, the foam quality of the shampoo and the feel of the hair after washing are lowered.

  Therefore, in a shampoo using an acylamino acid or a salt thereof, it is required to improve operability without impairing the foam quality and the feel of the hair after washing.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shampoo that has good operability and foam quality and can improve the feel of the hair after washing.

  The shampoo of the present invention capable of achieving the above object is characterized in that it contains an acylamino acid or a salt thereof, polyoxyethylene dioleic acid methyl glucoside, a branched fatty acid amidopropyl betaine, a cationized polymer and water. Is.

  ADVANTAGE OF THE INVENTION According to this invention, the operativity and foam quality are favorable, and the shampoo which can make the touch of the hair after washing | cleaning favorable can be provided.

  The acylamino acid or a salt thereof according to the shampoo of the present invention has an action of enhancing the feel of the hair after washing, and this action is more effective when combined with a branched fatty acid amidopropyl betaine and cationized cellulose described below. Good performance. Specific examples of acylamino acids or salts thereof include, for example, lauroyl-L-aspartic acid, coconut oil fatty acid-L-glutamic acid, lauroyl-L-glutamic acid, myristoyl-L-glutamic acid, stearoyl-L-glutamic acid, coconut oil fatty acid methyl Alanine, lauroylmethylalanine, myristoylmethylalanine, coconut oil fatty acid acylglycine, coconut oil fatty acid methyltaurine, lauroylmethyltaurine, coconut oil fatty acid sarcosine, lauroylsarcosine, and salts thereof (sodium salt, potassium salt, triethanolamine salt) Etc.), and only one of these may be used, or two or more may be used in combination.

  Among the above-mentioned acyl amino acids or salts thereof, acyl acid amino acids (acyl aspartic acid such as lauroyl-L-aspartic acid; coconut oil fatty acid-L-glutamic acid, lauroyl are more effective in enhancing the feel of hair after washing. -Acyl glutamic acid such as L-glutamic acid, myristoyl-L-glutamic acid, stearoyl-L-glutamic acid;

  In addition, for example, acyl glutamic acid or a salt thereof has a particularly good effect of softening the hair after washing. On the other hand, acylaspartic acid or a salt thereof is inferior to acylglutamic acid or a salt thereof in terms of softening the hair after washing, but an action that improves the bulkiness of the hair after washing is more effective in acylglutamic acid. Or better than its salts. Therefore, it is more preferable to use a combination of acyl aspartic acid or a salt thereof and acyl glutamic acid or a salt thereof in the shampoo of the present invention, which makes the hair after washing softer and more comfortable. It becomes possible to do.

  When acyl aspartic acid or a salt thereof and acyl glutamic acid or a salt thereof are used in combination, acyl in a shampoo is used in the hair after washing from the viewpoint of enhancing the feel of the hair after washing and improving the comfort. The mixing ratio of aspartic acid or a salt thereof to acylglutamic acid or a salt thereof is preferably 1: 5 to 1: 1.

  The amount of the acylamino acid or salt thereof in the shampoo is preferably 1% by mass or more, and more preferably 5% by mass or more from the viewpoint of satisfactorily exerting the above-described action due to its use.

  The acylamino acid or a salt thereof is a kind of anionic surfactant. However, in the shampoo of the present invention, only an acylamino acid or a salt thereof may be used as the anionic surfactant. You may use together an acylamino acid or its salt, and other anionic surfactant. However, if the amount of the anionic surfactant in the shampoo is too large, the tendency to feel squeaks on the hair due to strong degreasing power increases, so the amount of the anionic surfactant in the shampoo (the anionic interface blended in the shampoo) When the activator is only an acylamino acid or a salt thereof, the blending amount thereof is preferably 30% by mass or less, and more preferably 15% by mass or less.

  The polyoxyethylene dioleic acid methyl glucoside according to the shampoo of the present invention is combined with the branched fatty acid amidopropyl betaine described later, to improve the foam quality of the shampoo using an acylamino acid or a salt thereof and the feel of the hair after washing. Without impairing the effect, the viscosity is increased and the operability is improved. Therefore, the shampoo of the present invention ensures high operability without blending an anionic surfactant such as an alkyl sulfate or polyoxyethylene alkyl ether sulfate known as a component having a high thickening action. can do.

  It is preferable that the average addition mole number of the oxyethylene unit in polyoxyethylene dioleic acid methyl glucoside is 80-150.

  The blending amount of polyoxyethylene dioleic acid methyl glucoside in the shampoo is 0.5% by mass or more and preferably 1% by mass or more from the viewpoint of satisfactorily exerting the above-described action due to its use. However, if the amount of polyoxyethylene dioleic acid methyl glucoside in the shampoo is too large, the hair tends to be stiff after washing or drying. Therefore, the blending amount of polyoxyethylene dioleic acid methyl glucoside in the shampoo is preferably 5% by mass or less, and more preferably 4% by mass or less.

  The branched fatty acid amidopropyl betaine according to the shampoo of the present invention is a kind of amphoteric surfactant. Among various amphoteric surfactants, branched fatty acid amidopropyl betaine has the most excellent shampoo thickening effect when combined with methyloxyside of polyoxyethylene dioleic acid, and also has the effect of increasing the foam quality of shampoo. doing. Moreover, the branched fatty acid amidopropyl betaine also has an effect of enhancing the feel of the hair after washing, and the effect is satisfactorily exhibited by combining with an acylamino acid or a salt thereof and a cationized polymer.

  Specific examples of the branched fatty acid amidopropyl betaine include, for example, isostearic acid amidopropyldimethylaminoacetic acid betaine, and only one of them may be used, or a plurality of them may be used.

  The blended amount of the branched fatty acid amidopropyl betaine in the shampoo can exert the above-mentioned action satisfactorily, and the viscosity of the shampoo can be well maintained over time, and the foam persistence is also good. Furthermore, since transparency of the shampoo can be maintained well, it is preferably 0.1% by mass or more, and more preferably 0.5% by mass or more. However, if the amount of branched fatty acid amidopropyl betaine in the shampoo is too large, it may remain excessively on the hair and become hard at the finish, which may reduce the effect of improving the feel of the hair, and may cause foaming. May decrease. Therefore, the blending amount of the branched fatty acid amidopropyl betaine in the shampoo is preferably 10% by mass or less, and more preferably 5% by mass or less.

  The cationized polymer according to the shampoo of the present invention is a component that enhances the feel of the hair after washing, and when combined with an acylamino acid or a salt thereof, and a branched fatty acid amidopropyl betaine, its action is exhibited better. . Examples of the cationized polymer include cationized cellulose (such as O- [2-hydroxy-3- (trimethylammonio) propyl] hydroxyethylcellulose chloride), cationized starch, cationized xanthan gum, diallyl quaternary ammonium salt / acrylamide. Polymer, vinyl imidazolium trichloride / vinyl pyrrolidone copolymer, hydroxyethyl cellulose / dimethyldiallylammonium chloride copolymer, vinyl pyrrolidone / quaternized dimethylaminoethyl methacrylate copolymer, vinyl pyrrolidone / alkylamino acrylate copolymer, Vinylpyrrolidone / alkylaminoacrylate / vinylcaprolactam copolymer, vinylpyrrolidone / methacrylamidopropyl trimethylammonium chloride copolymer Alkylacrylamide / acrylate / alkylaminoalkylacrylamide / polyethylene glycol methacrylate copolymer, adipic acid / dimethylaminohydroxypropylethylenetriamine copolymer, cationized fenugreek gum, cationized guar gum, cationized tara gum, cationized locust bean gum, etc. Can be mentioned.

  The amount of the cationized polymer in the shampoo is preferably 0.05% by mass or more, and more preferably 0.1% by mass or more, from the viewpoint of ensuring the above-described effects due to its use. However, if the amount of the cationized polymer in the shampoo is too large, the cationized polymer remains on the hair during washing with the shampoo, which accumulates due to continuous use of the shampoo, and the hair tends to become stiff. Therefore, the blending amount of the cationized polymer in the shampoo is preferably 0.5% by mass or less, and more preferably 0.4% by mass or less.

  The shampoo of the present invention uses water as a solvent in the same manner as a normal shampoo. The amount of water in the shampoo is preferably, for example, 50 to 90% by mass.

  The shampoo of the present invention preferably further contains an amphoteric surfactant other than the branched fatty acid amidopropyl betaine. By combining branched fatty acid amidopropyl betaine with other amphoteric surfactants, the effect of improving the viscosity of shampoo and the effect of improving foam quality (foaming power, foaming power) and hair feel after washing The balance is particularly good.

  Examples of amphoteric surfactants other than branched fatty acid amidopropyl betaine include, for example, linear fatty acid amidopropyl betaine [lauric acid amidopropyl betaine (lauric acid amidopropyldimethylaminoacetic acid betaine), coconut oil fatty acid amidopropyl betaine, ricinoleic acid Amidopropyl Betaine, Palm Fatty Acid Amidopropyl Betaine, etc.], Undecyl-N-hydroxyethyl-N-carboxymethylimidazolinium betaine, 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, N-alkyl -N, N-dimethylammonium-N-propylsulfonate sodium, N-alkyl-N, N-dimethylammonium-N- (2-hydroxypropyl) sulfonate sodium, N-fatty acid amid Pills -N, N-dimethylammonium-N-(2-hydroxypropyl) sulfonate, sodium laurate amidopropyl dimethylamine oxide, sodium lauryl aminopropionic acid, coconut oil alkyl betaine, lauryl hydroxy sulfobetaine.

  Among these amphoteric surfactants, linear fatty acid amidopropyl betaines are more preferred, and lauric acid amidopropyldimethylaminoacetic acid betaine is more preferable in that the above-mentioned effects due to the combination with branched fatty acid amidopropyl betaines are particularly good. Further preferred.

  When a branched fatty acid amidopropyl betaine is used in combination with other amphoteric surfactants, the blending ratio of the branched fatty acid amidopropyl betaine to other amphoteric surfactants in the shampoo is better balanced than the above. From the viewpoint of making it, it is preferably 1: 2 to 3: 1.

  In addition, when the blending ratio of the acylamino acid or its salt and the amphoteric surfactant is 2: 1 to 10: 1, the shampoo foam quality (foaming power, foaming power) and the hair feel after washing are While improving, it is particularly difficult to increase the viscosity of the shampoo. However, according to the present invention, by blending each of the above components, for example, the blending ratio of an acylamino acid or a salt thereof and an amphoteric surfactant containing a branched fatty acid amidopropyl betaine can be compared within the above range. Therefore, it is possible to obtain a shampoo having an excellent balance between the operability improvement effect and the foam quality and the hair feel improvement effect after washing.

  Furthermore, the shampoo of the present invention can be blended with various components used in ordinary cosmetics as long as the effects of the present invention are not impaired. Examples of such components include anionic surfactants other than acylamino acids or salts thereof, nonionic surfactants, polymers other than cationized polymers, monovalent alcohols, fats and oils, esters, waxes, hydrocarbons, Examples include fatty acids, chelating agents, preservatives, antioxidants, pH adjusters and the like.

  Examples of anionic surfactants other than acylamino acids or salts thereof include coconut oil fatty acid sodium, coconut oil fatty acid potassium, cocoyl isethionic acid and its salts (sodium salt, potassium salt, etc.), polyoxyethylene lauryl ether acetic acid and Its salts (sodium salt, potassium salt, etc.), disodium alkylsulfosuccinate, disodium polyoxyethylene sulfosuccinate lauryl, lauroyl hydrolyzed silk sodium, isostearic acid hydrolyzed silk AMP (condensate of isostearic acid and hydrolyzed silk) 2-amino-2-methyl-1-propanol salt), cocoyl hydrolyzed soy protein potassium, cocoyl hydrolyzed collagen salt (sodium salt, potassium salt, etc.), sodium tetradecene sulfonate, polio Shi polyoxyethylene lauryl ether phosphoric acid and its salts (sodium salt, potassium salt, etc.) and the like.

  Examples of the nonionic surfactant include alkyl alkanol type nonions such as coconut oil fatty acid N-methylethanolamide, lauric acid diethanolamide, palm kernel fatty acid diethanolamide, stearic acid monoethanolamide, and lauric acid monoisopropanolamide. A surfactant is preferred.

  Examples of the polymer other than the cationized polymer include sodium polyacrylate, cellulose ether, sodium alginate, carboxyvinyl polymer, hydroxyethyl cellulose, polyvinyl pyrrolidone, carrageenan, guar gum, hyaluronic acid, chitosan, polyethylene glycol and the like. Examples of the monovalent alcohol include lower alcohols such as ethyl alcohol, isopropyl alcohol, butyl alcohol, and benzyl alcohol; higher alcohols such as lauryl alcohol, myristyl alcohol, cetyl alcohol, stearyl alcohol, oleyl alcohol, and behenyl alcohol.

  Examples of the fats and oils include shea fat, wheat germ oil, rice bran oil, macadamia nut oil, meadow home oil, and egg yolk oil. Examples of the ester include isopropyl myristate, myristyl myristate, stearyl stearate, isostearyl laurate, octyldodecyl oleate, hexyl 2-ethylhexanoate, di-2-ethylhexyl succinate, dioctyl succinate, and phytosteryl isostearate. Is mentioned.

  Examples of the wax include candelilla wax, jojoba oil, beeswax, and carnauba wax. Examples of the hydrocarbon include light isoparaffin, light liquid isoparaffin, squalane, ceresin, paraffin, liquid paraffin, liquid isoparaffin, petrolatum, microcrystalline wax, and the like. 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.

  Examples of the chelating agent include ethylenediaminetetraacetic acid or its salt, diethylenetriaminepentaacetic acid or its salt, hydroxyethylethylenediaminetriacetic acid or its salt, hydroxyethanediphosphonic acid or its salt, and the like. Examples of the preservative include sodium benzoate, methyl paraoxybenzoate, propyl paraoxybenzoate, butyl paraoxybenzoate, phenoxyethanol, methylchloroisothiazolinone / methylisothiazolinone solution, 2-methyl-4-isothiazoline-3- ON etc. are mentioned. Examples of the antioxidant include dl-α-tocopherol, dibutylhydroxytoluene, erythorbic acid, anhydrous sodium sulfite and the like. Examples of the pH adjusting agent include acids such as citric acid, phosphoric acid, malic acid, tartaric acid, and lactic acid; alkaline agents such as ammonia, sodium hydroxide, triethanolamine, and arginine.

  The shampoo of the present invention can be prepared by dissolving or dispersing each of the above components in water as a medium. The shampoo of the present invention may be liquid, gel, or emulsion.

  In addition, it is preferable that the viscosity measured by the method employ | adopted in the Example mentioned later is 200 mPa * s or more, and, thereby, the shampoo of this invention can ensure more favorable operativity. In addition, the viscosity of a shampoo can be adjusted to such a value by setting it as the composition demonstrated so far.

  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 shown in% so that the total amount of shampoo is 100%. All the percentages are mass%, and in Tables 1 to 3, % Is omitted, and only the numerical value indicating the blending amount is displayed. Further,% used in other than Tables 1 to 3 in this example means mass% unless otherwise specified.

Examples 1-8 and Comparative Examples 1-6
The shampoo compositions of Examples 1 to 8 and Comparative Examples 1 to 6 were prepared with the compositions shown in Tables 1 to 3.

  In addition, some of the raw materials used for the preparation of the shampoos of Examples and Comparative Examples may contain components (solvents and the like) other than the components listed in the table. The amount of only the components described in the table included in the raw materials is shown as the blending amount. And in Tables 1 to 3, “with a total of 100” in the column of water means “total amount of each component other than water constituting the shampoo (in the raw material including components other than the components listed in the table” It means that the amount of water is added to the total amount including the amount of “components other than the components described” to be 100%.

  Further, “Ratio A” in Tables 1 to 3 indicates the amount of branched fatty acid amidopropyl betaine (amidopropyl dimethylaminoacetic acid betaine isostearate) and linear fatty acid amidopropyl betaine (amidopropyldimethylaminoacetic acid laurate). The ratio (mass basis) with the blending amount of betaine), “ratio B” is the blending amount of acylamino acid or a salt thereof (coconut oil fatty acid-sodium L-glutamate and lauroyl-sodium L-aspartate) , Ratio of amphoteric surfactants [branched fatty acid amidopropyl betaine (isostearic acid amidopropyl dimethylaminoacetic acid betaine) and linear fatty acid amidopropyl betaine lauric acid amidopropyldimethylaminoacetic acid betaine)] (mass basis) ).

  Furthermore, “POE” in “POE (2) sodium lauryl ether sulfate”, “POE (120) dioleic acid methyl glucoside” and “triisostearic acid POE (120) methyl glucoside” in Tables 1 to 3 is “polyoxyethylene”. The number in parentheses after POE is the average number of moles added of oxyethylene units. Moreover, the "alkyl (8-16) glucoside aqueous solution" in Tables 1 to 3 has an alkyl (8-16) glucoside concentration of 40%, and the alkyl (8-16) glucoside in the aqueous solution is an alkyl moiety. In which the number of carbon atoms is 8-16. Furthermore, “appropriate amount” in the column of citric acid in Tables 1 to 3 means that the shampoo was used in such an amount that the pH was 6.

Moreover, the raw materials described in Tables 1 to 3 are as follows.
Cationized cellulose: O- [2-hydroxy-3- (trimethioammonio) propyl] hydroxyethylcellulose chloride, “UCARE Polymer JR-30M (trade name)” manufactured by Amerchol.
Isostearic acid amidopropyl dimethylaminoacetic acid betaine: "Obazoline ISAB (trade name)" manufactured by Toho Chemical Industry Co., Ltd. (containing isostearic acid amidopropyldimethylaminoacetic acid betaine: 31%, dipropylene glycol: 33%, water: 32%, etc.) .
Antiseptic: “Caisson CG (trade name)” manufactured by Rohm & Haas Japan, 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one blend.
Chelating agent: ethylenediaminetetraacetic acid disodium salt dihydrate.

  Viscosity measurement, operability evaluation, foam quality evaluation, and hair feel after washing with these shampoos were performed on the shampoos of Examples and Comparative Examples.

<Viscosity measurement>
After putting each shampoo of an Example and a comparative example in a container and immersing those containers in a 25 degreeC thermostat for 1 hour, the viscosity of each shampoo was measured using the B-type viscometer. In addition, No. 2 rotor was used for the measurement of the shampoo of Comparative Example 1 having the highest viscosity, and No. 1 rotor was used for the measurement of other shampoos.

<Evaluation of operability>
5 expert panelists took out each shampoo 2 push (about 6g) from each pump container filled with each shampoo of Example and Comparative Example, and when it was taken in the hand, The score was given according to the following criteria.
Good 2 points,
Somewhat good,
Usually 0 points,
Slightly bad -1 point,
Bad -2 points.

  And the operability of the shampoos of Examples and Comparative Examples was evaluated by summing up the scores of all panelists.

<Evaluation of foam quality and evaluation of hair feel after washing>
The above-mentioned 5 panelists specialize in washing their hair with each shampoo that they picked up in the evaluation of operability, the foam quality (foaming power and foam persistence) of each shampoo and the hair after washing The touch was scored according to the same criteria as in the evaluation of operability. And the score of all the panelists was totaled and the foam quality in the shampoo of an Example and a comparative example and the touch of the hair after washing | cleaning were evaluated.

  Table 4 shows the results of the above measurements and evaluations.

  As shown in Table 4, the shampoos of Examples 1 to 8 in which an acylamino acid or a salt thereof, polyoxyethylene dioleic acid methyl glucoside, a branched fatty acid amidopropyl betaine, a cationized polymer and water were blended had high viscosity and operability. And the foam quality is excellent, and the hair washed with these shampoos has a good feel.

  On the other hand, the shampoo of Comparative Example 1 using another anionic surfactant (polyoxyethylene alkyl ether sulfate widely used as an anionic surfactant for shampoo) instead of acylamino acid or a salt thereof. Although the viscosity is high and the operability is excellent, the effect of enhancing the feel of the hair after washing is particularly inferior. Of the shampoos of Comparative Example 2 and Comparative Example 3 in which other thickeners are used instead of polyoxyethylene dioleic acid methyl glucoside, the shampoo of Comparative Example 2 has the same viscosity as the shampoo of Comparative Example 1. Although it is high and excellent in operability, the effect of enhancing the feel of the hair after washing is particularly inferior, and the foam quality is also inferior. The shampoo of Comparative Example 3 has a low viscosity and poor operability, and further has an inferior effect of enhancing the feel of the hair after washing.

  Moreover, the shampoo of the comparative example 4 which mix | blended the linear fatty acid amide propyl betaine instead of the polyoxyethylene dioleic acid methyl glucoside, and mix | blended the linear fatty acid amide propyl betaine, and the branched fatty acid amide propyl betaine were mix | blended. The shampoo of Comparative Example 5, which was not present, has a low viscosity and poor operability, and further has an inferior effect of enhancing foam quality and hair feel after washing. The shampoo of Comparative Example 6 in which the straight chain fatty acid amidopropyl betaine was blended without blending the branched fatty acid amidopropyl betaine has good operability and foam quality, but has the effect of enhancing the feel of the hair after washing. The balance is poor.

The shampoos of Example 1 and Example 2 and the shampoo of Example 6 have the same composition other than the amphoteric surfactant and the total amount of amphoteric surfactant. The former is a branched fatty acid amidopropyl. Betaine and linear fatty acid amidopropyl betaine are used in combination, whereas the latter differs only in that the amphoteric surfactant is only branched fatty acid amidopropyl betaine. When these shampoos are compared, the shampoos of Example 1 and Example 2 are slightly different in operability than the shampoos of Example 6, but they are not a difference that causes a problem. The effect of enhancing the feel of hair is excellent. That is, the shampoos of Example 1 and Example 2 are superior to the shampoo of Example 6 in balance between operability and the effect of enhancing foam quality and the feel of the hair after washing.

Claims (2)

Acyl amino acid or a salt thereof, polyoxyethylene dioleic acid methyl glucoside, amphoteric surfactant , cationized polymer and water are blended ,
As the amphoteric surfactant, a branched fatty acid amidopropyl betaine and a linear fatty acid amidopropyl betaine are blended,
A shampoo comprising acylaspartic acid or a salt thereof and acylglutamic acid or a salt thereof as the acylamino acid or a salt thereof . The shampoo according to claim 1, wherein the blending ratio of the branched fatty acid amidopropyl betaine and the amphoteric surfactant other than the branched fatty acid amidopropyl betaine is 1: 2 to 3: 1 in terms of mass ratio.