JP4947419B2 - Shellac-containing O / W hair cosmetic - Google Patents

Description

  The present invention relates to an O / W type hair cosmetic (particularly hair treatment, hair rinse, hair conditioning, etc.).

  In recent years, chemical treatment of hair (hair dyeing treatment, permanent treatment, etc.) has been carried out frequently, deterioration of the surrounding environment (air pollution, increase in the amount of ultraviolet rays, etc.) and psychological effects (increase in stress) ) Etc., and many people are currently hurting their hair. Accompanying this, there are many troubles about hair related to damaged hair, in particular, the hair is not glossy or tangled.

  Conventionally, in order to eliminate such troubles of hair, hair treatment has been performed using a hair cosmetic such as hair treatment, hair rinse, or hair conditioning. As such hair cosmetics, for example, hair conditioning blended with silicone oil (Patent Document 1) or hair treatment blended with shellac (Patent Document 2) has been proposed.

  However, in the case of the hair conditioning described in Patent Document 1, there is a problem in the feel of the hair because it feels oily (sticky feeling) when touching the hair. In addition, the hair treatment described in Patent Document 2 has a problem that the shampoo resistance is not sufficient.

JP-A-10-7534. Japanese Patent Application Laid-Open No. 2004-26708.

  In view of the above circumstances, the present invention imparts extremely excellent luster (especially natural luster) to the hair, improves the comb and fingers of the hair, prevents the hair from getting tangled, and imparts a smooth feeling to the hair. An object of the present invention is to provide a hair treatment or the like that has no oiliness (stickiness) when touching hair and has extremely excellent shampoo resistance.

In order to solve the above-mentioned problems, the inventors of the present application diligently studied and as a result, the following inventions of the present application were achieved.
That is, the first invention of the present application is shellac 2.5 to 5 wt%, ethanol 7.5 wt% or more and an amount capable of dissolving shellac, cationic surfactant 1 to 10 wt%, and myristyl alcohol 3 to 15 wt%. Provided is an O / W hair cosmetic composition.

Second invention further provides a first shot bright hair cosmetic compositions herein containing steroids 0.2-1.0 wt%.

The third invention of the present application provides the hair cosmetic composition of the second invention of the present application, wherein the steroid is cholesterol.

The fourth invention of the present application provides the hair cosmetic composition of any one of the first to third inventions of the present invention containing 2.5 to 7.0 parts by weight of ethanol per 1 part by weight of shellac.

  According to the present invention, the hair is imparted with extremely excellent gloss (especially natural gloss), the comb of the hair is improved, the hair is prevented from getting tangled, the hair is given a smooth feeling, and the hair is touched. Sometimes, it is possible to provide a hair treatment or the like having no oiliness (stickiness) and extremely excellent shampoo resistance.

Hereinafter, the best embodiment of the present invention will be described in detail.
In the present hair cosmetic, shellac is blended. Shellac has film-forming properties. By adding shellac, it gives gloss to the hair, while having no oiliness (stickiness), and further improves the comb and fingers of the hair.

In the present hair cosmetic, ethanol is blended. By adding ethanol , shellac can be dissolved (or uniformly dispersed) in the aqueous phase of the present hair cosmetic composition .

  In the present hair cosmetic, a cationic surfactant is blended. By blending a cationic surfactant, it is possible to improve emulsion stability, hair gloss, comb / finger passage, and the like. Examples of the cationic surfactant include alkyl quaternary ammonium salts, amide bond-containing quaternary ammonium salts, and the like.

  In the cationic surfactant, the alkyl quaternary ammonium salt specifically includes cetyltrimethylammonium chloride, bromide or stearyltrimethylammonium chloride, aralkyltrimethylammonium chloride, bromide or behenyltrimethylbromide. Examples thereof include ammonium, distearyldimethylammonium chloride, bromide or dicetyldimethylammonium chloride, dibehenyldimethylammonium chloride, bromide or stearyldimethylbenzylammonium bromide, and one or more of these are used. Good. Preferred is behenyltrimethylammonium chloride.

  In the cationic surfactant, the amide bond-containing quaternary ammonium salt is specifically exemplified by ethyl sulfate lanolin fatty acid amidopropylethyldimethylammonium, ethyl sulfate long chain branched fatty acid (C12 to C31) aminopropylethyldimethylammonium, ethylsulfate. Examples thereof include 18-methyleicosanoic acid aminopropylethyldimethylammonium and isostearic acid amide, and one or more of these may be used. Preferred is ethyl lanolin sulfate fatty acid amidopropylethyldimethylammonium.

In the present hair cosmetic, myristyl alcohol is blended. By blending myristyl alcohol, it is possible to improve the gloss of the hair and the comb and finger passage. In particular, myristyl alcohol exhibits a needle-like crystals, further, it is possible to improve the luster of the hair.

  In the present hair cosmetic composition, it is preferable to add steroids as additives. By blending steroids, the gloss of hair can be improved. Specific examples of the steroids include cholesterol, phytosterol, campesterol, sitosterol, dihydrocholesterol (cholestanol), stigmasterol, cholesteryl isostearate, cholesteryl 2-ethylhexanoate, cholesteryl oleate, cholesteryl stearate, dehydro Cholesterol, cholesteryl nonanoate (cholesteryl pelargonate), cholesteryl hydroxystearate, polyoxyethylene cholestanol ether, polyoxyethylene cholesteryl ether, polyoxyethylene phytostanol, polyoxyethylene phytosterol, cholesteryl butyrate (cholesteryl butyrate) One or more of these may be used. Preferably, it is cholesterol.

  In the present hair cosmetics, other additives include fatty acid esters (isopropyl myristate, monostearate glycerin, etc.), fats and oils (vegetable oil, etc.), silicone oils (dimethylpolysiloxane, etc.), hydrocarbons (liquid paraffin, etc.) May be added.

In the blend composition of the present hair cosmetic, shellac is 2.5 to 5 (preferably 3.0 to 4.0)% by weight, ethanol is 7.5% by weight or more with respect to the total amount of the hair cosmetic [preferably 7.5. To 20 (particularly preferably 9.0 to 16.0)% by weight], the cationic surfactant is 1 to 10 (preferably 2.0 to 6.0)% by weight, and the myristyl alcohol is 3 to 15 (preferably 5.0 to 11.0)% by weight, respectively. Ethanol is an amount capable of dissolving at least shellac, and specifically 2.5 to 7.0 (particularly 3.0 to 5.0) parts by weight of ethanol per 1 part by weight of shellac is preferable. Moreover, 0.2 to 1.0 weight% of steroids is preferable.

If there is too little shellac, ethanol , or cationic surfactant, hair gloss, hair comb / finger passage, and shampoo resistance are poor. Moreover, when there is too little ethanol or a cationic surfactant, dispersion | distribution or melt | dissolution of shellac will become difficult. Too little myristyl alcohol results in poor combing and fingering of the hair.

If there is too much shellac, the hair becomes too hard, the fingers and combs are bad, or the emulsification is poor. If there is too much ethanol , viscosity will fall and emulsification will become poor. When there are too many cationic surfactants, gloss will fall, a viscosity will fall, and it will become easy to isolate | separate. When there is too much myristyl alcohol, gloss will fall and emulsification will become poor.

In the preparation of the hair cosmetic composition of the present application, shellac is preferably dissolved in ethanol and blended in advance.

  The hair cosmetic composition of the present invention obtained as described above has an O / W (oil-in-water) type emulsified form. The viscosity of the hair cosmetic composition of the present application is appropriately selected according to the product type, and may be, for example, from a pumping viscosity to a cup filling viscosity. The present hair cosmetic is useful as hair rinse, hair treatment, hair conditioning and the like.

Hereinafter, the present invention will be specifically described with reference to examples.
<Preparation of hair treatment>
-Examples 1-4 and Comparative Examples 3, 5-9
An ethanol solution of shellac was prepared. On the other hand, the remaining oil component was heated to 65 to 68 ° C. to obtain a uniform melt. The shellac ethanol solution was added to the homogeneous melt to obtain a uniform mixture. After heating this uniform mixture to 65-68 degreeC, the 65-68 degreeC heating water was added to this, and the emulsion was obtained. The emulsion was cooled and stirred until the desired viscosity was obtained, to prepare hair treatments (Each Example 1-4 and Comparative Examples 3, 5-9). Table 1 shows the composition.
In Comparative Example 6, the hair treatment could not be prepared because two layers were separated.

Comparative examples 1 and 2
A hair treatment (respective comparative examples 1 and 2) was prepared in the same manner as in Example 2 except that methylpolysiloxane (20 cs) or liquid paraffin was used instead of shellac.

Comparative example 4
A hair treatment (Comparative Example 4) was prepared in the same manner as in Example 2 except that ethanol was not used. However, a hair treatment could not be prepared because shellac did not dissolve in the homogeneous melt composed of the remaining oily component.

Comparative Example 10
A shellac ethanol solution was heated to 65-68 ° C. Emulsification was attempted by adding heated water at 65 to 68 ° C. to the heated shellac ethanol solution. However, hair treatment could not be prepared because shellac precipitated from the aqueous phase.

<Evaluation test of hair treatment>
About the hair treatment obtained above (each Example 1-4, comparative examples 1-3, comparative example 5, and comparative examples 7-9), various evaluation tests were done with the following method. Table 1 shows the evaluation test results.

-Each sensory evaluation test of gloss and stickiness of hair First, the hair treatment was applied after shampooing the hair and drying it with towel. The sensory evaluation was performed on the glossiness and stickiness of the hair (the oiliness on the hand).
In Table 1, in the "hair gloss" column, "◎" is "very glossy", "○" is "glossy", "△" is "less glossy", and "x" is ""It has almost no gloss".

-Sensory evaluation test as per finger of hair The hair to which the above hair treatment was applied was further rinsed and dried. Sensory evaluation was performed on the finger as to the hair at the time of rinsing and the hair after drying.
In Table 1, in the "Finger's fingering" column, "◎" means "the hair at the time of rinsing and the hair after drying are very smooth and the hair is not entangled at all", and "○" is "Rinse" Both the hair at the time and the hair after drying are smooth, and the hair is hardly tangled. "," △ "is" normally both hair at the time of rinsing and hair after drying ", and" x "is" rinsing " Both the hair at the time and the hair after drying are rough and the hair is very tangled.

・ Shampoo resistance test 1 cycle of [Shampoo + Rinse + Dry] until the hair treatment effect (hair gloss, hair fingering, etc.) does not remain on the hair after applying the above hair treatment, rinsing and drying. Repeated the shampoo treatment.
In Table 1, in the “Shampoo resistance” column, “◎” means “the hair treatment effect remained even after repeated shampoo treatment for 7 cycles or more”, and “◯” means “4-6 cycles of shampoo treatment”. Repeatedly, the hair treatment effect has disappeared "," △ "means" 2 to 3 cycles of shampoo treatment have been repeated, and the hair treatment effect has disappeared ", and" x "means" 1 cycle of shampoo treatment. "The treatment effect has disappeared."

From the results in Table 1, the following is clear.
When a hair treatment (Comparative Examples 1 and 2) containing silicone oil or liquid paraffin instead of shellac is used, the hair feels sticky (oiliness on the hand) strongly.

Furthermore, a comparison of the hair treatment of Comparative Example 5 and Example 4, when d Tano Le containing amount is insufficient, particularly resistance to shampoo resistance is significantly reduced.

<Action and mechanism>
The action / mechanism in the present invention is considered as follows.
That is, the present O / W hair cosmetic contains a high content (7.5% by weight or more) of ethanol . Therefore, a sufficient amount of shellac is dissolved and dispersed not only in the micelle but also in the aqueous phase. And when this-application O / W type hair cosmetics are apply | coated to hair, this shellac containing water phase covers the hair surface first, and a micelle adheres after that. Therefore, a shellac coating (FIGS. 1A and 2) is first formed on the surface of the hair (FIGS. 1A and 1), and an oily component layer (FIGS. 1A and 3) other than shellac (ie, cationic surface activity) is further formed on the surface of the shellac coating. Agent, oily component layer such as myristyl alcohol). Thus, as a result of directly covering the hair surface with the shellac film, the gloss of the hair, the comb of the hair and the finger, and the shampoo resistance are extremely excellent. In particular, since myristyl alcohol exhibits a needle-like crystals, the reflection of the crystals strongly, gloss of the hair is even, shine.

On the other hand, when the ethanol content is not sufficient (less than 7.5% by weight), shellac is mainly present only in the micelles and hardly dissolved or dispersed in the aqueous phase. As a result, only the dried micelle particles (FIGS. 1B and 4) are formed on the hair (FIGS. 1B and 1) without forming a shellac film. Further, since the dried particles of micelles are not in the form of a film, the gloss of the hair, the comb of the hair and the finger, and the shampoo resistance are poor.

In addition, when hair (especially damaged hair) is treated by conventional hair treatment using silicone oil or liquid paraffin instead of shellac, the surface of the hair (FIG. 1C, 1) is hydrophilic, so that it is hydrophilic oily. A component layer (FIGS. 1C and 3) (ie, an oily component layer such as a cationic surfactant, myristyl alcohol, etc.) is first adsorbed and formed on the hair surface, and a lipophilic silicone oil or fluid is further formed on the oily component layer surface. A paraffin layer (FIGS. 1C, 5) is formed. Thus, as a result of covering the outer surface of the hair with the silicone oil or the liquid paraffin layer, the hair feels strongly sticky (oiliness that is attached to the hand).

A represents an enlarged cross-sectional view of the hair treated by the present hair treatment. B represents an enlarged cross-sectional view of hair treated with a hair treatment with insufficient C1-C3 alcohol content. C represents an enlarged cross-sectional view of hair treated with a conventional hair treatment containing silicone oil or liquid paraffin instead of shellac.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hair 2 Shellac coating 3 Oil component layer 4 Micelle dry particle 5 Silicone oil or liquid paraffin layer

Claims (4)

O / W hair makeup containing 2.5 to 5% by weight of shellac, 7.5% by weight or more of ethanol and an amount capable of dissolving shellac, 1 to 10% by weight of cationic surfactant, and 3 to 15% by weight of myristyl alcohol Fee. Further, O / W type hair cosmetic composition of claim 1 containing steroids 0.2-1.0 wt%. The O / W hair cosmetic according to claim 2 , wherein the steroid is cholesterol. The O / W-type hair cosmetic composition according to any one of claims 1 to 3 , which contains 2.5 to 7.0 parts by weight of ethanol per 1 part by weight of shellac.

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