JP2009286751A - Hair cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hair cosmetic having a sufficient setting power for imparting hair with gloss (luster) and setting to a desired hair style, having excellent applicability to the hair, giving natural feeling of the hair with little stickiness and reducing the peeling of a nail cosmetic. <P>SOLUTION: The hair cosmetic is produced by compounding (A) 1-30 mass% (based on the total hair cosmetic) candelilla wax and microcrystalline wax, (B) 0.05-2 mass% acrylic acid-alkyl methacrylate copolymer and (C) 1-15 mass% coconut oil. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hair cosmetic that provides sufficient setting power to give the hair a gloss (gloss) and adjust it to the desired hairstyle, and is particularly excellent in applicability to hair and less sticky and natural. The present invention relates to a hair cosmetic that has a finished feeling and also has a characteristic that the cosmetic for nails does not easily peel off when used.

  In hair cosmetics, a setting resin and a wax component (or wax) are sometimes blended in order to set hair in general. The dosage form mainly using the wax component has a high market value because it has re-hair styling properties.

  However, when a wax component (hereinafter referred to as “wax”) is blended, there is a problem that even if there is a hairstyling power (setting power), the hair becomes sticky or the elongation to the hair becomes poor. As a means to solve this, attempts have been made to combine acrylic acid polymers and fats and oils, but when fats and oils are blended, the set power is reduced even if the elongation and coatability of the hair cosmetics are improved. Therefore, further improvement of the setting power is desired (for example, Patent Document 1).

  On the other hand, with regard to cosmetics for nails (hereinafter sometimes referred to as “nail cosmetics”), in recent years, specialty stores called nail salons are also known, and interest in nail cosmetics is increasing. In such a background, it is known that the performance required for the nail cosmetic itself is good after application (that is, it is difficult to peel off), and an example of applying overcoat after applying the nail cosmetic. (For example, Patent Documents 2 and 3).

However, it has been pointed out that when applying hair cosmetics to hair, the hair cosmetics adhere to the nails and the nail cosmetics are easily peeled off. For these reasons, as a required characteristic for hair cosmetics, it is actually desired that nail cosmetics are difficult to peel off even if they adhere to nails.
JP, 2004-161628, A Claim etc. JP-A-2001-278748 Claims etc. JP-A-2002-68941 Claims etc.

  The present invention has been made under such circumstances, and its purpose is to give the hair a gloss (gloss) and to have a sufficient setting power to prepare the desired hairstyle and to be excellent in applicability to the hair. An object of the present invention is to provide a hair cosmetic that has a less sticky feeling, has a natural finish, and can reduce the peeling of the nail cosmetic.

  The hair cosmetic composition of the present invention capable of achieving the above-mentioned object is a ratio of the total amount of the hair cosmetic composition, (A) candelilla wax and microcrystalline wax: 1 to 30% (meaning “mass%” The same applies hereinafter), (B) an acrylic acid / alkyl methacrylate copolymer: 0.05 to 2%, and (C) coconut oil: 1 to 15%.

  In the hair cosmetic composition of the present invention, the mixing ratio [(A) :( C)] of (A) candelilla wax and microcrystalline wax and (C) coconut oil is 10: 1 to 1: 4 (mass ratio). And the blending ratio of the candelilla wax and the microcrystalline wax in the component (A) (candelilla wax: microcrystalline wax) is 9: 1 to 1: 9 (mass ratio). It is preferable to do.

  The hair cosmetic composition of the present invention is assumed to be used in a cream form (including an emulsion) as a basic dosage form, but its viscosity is suitably 100 to 30000 mPa · s. . Further, such a hair cosmetic exhibits a characteristic that the nail cosmetic does not easily peel off when used.

  In the present invention, at least (A) candelilla wax and microcrystalline wax, (B) acrylic acid / alkyl methacrylate copolymer, and (C) coconut oil are blended at an appropriate ratio, so that the hair is glossy ( (Gloss) and a hair cosmetic that has sufficient setting power to prepare the desired hairstyle, is excellent in applicability to the hair, has a less sticky feel, and has a natural finish. The nail cosmetics also exhibit the property of being difficult to peel off.

  This inventor examined from various angles in order to implement | achieve the hair cosmetics which exhibit the above characteristics. As a result, at least (A) waxes such as candelilla wax and microcrystalline wax, (B) acrylic acid / alkyl methacrylate copolymer as a thickener, and (C) coconut oil as fats and oils are appropriately used. The hair cosmetics formulated in proportions have found that the above objects can be achieved brilliantly, and the present invention has been completed.

  Waxes such as the above candelilla wax and microcrystalline wax [component (A)] are useful components for imparting sufficient setting power to the hair when a hair cosmetic is applied. In order to exert such an effect, the waxes need to be blended in an amount of 1% or more in the proportion of the entire hair cosmetic. However, if the blending amount is excessive and exceeds 30%, the hair cosmetic composition is not easily stretched and sticky. The blending amount of these waxes is preferably 5% or more.

  By the way, various waxes other than those described above are used for the hair cosmetic composition of the present invention (for example, beeswax, carnauba wax, petrolatum, etc.). As a result of studies by the present inventors, in the hair cosmetic composition of the present invention, among the various waxes described above, the combination of the above candelilla wax and the microcrystalline wax is the most effective combination for imparting the set power. Became clear. However, these waxes have different effects on the “glossiness” and “setting power” of the hair depending on the type, and it is preferable that the blending ratio thereof is also appropriate. That is, in order to effectively exert the “setting power” imparting effect by the component (A) without reducing the “glossiness”, the mixing ratio of candelilla wax and microcrystalline wax (candelilla wax: microcrystalline wax) ) Is preferably in the range of 9: 1 to 1: 9 (mass ratio).

  The (B) component acrylic acid / alkyl methacrylate copolymer is a thickener having properties as a polymer emulsifier, the lipophilic part is adsorbed on the interface between oil and water, and the hydrophilic part is water. A component that swells to form a hydrated gel phase around oil droplets, imparts moderate viscosity to hair cosmetics to enhance stability, and imparts a moderate gloss to hair to impart setability. is there. In order to exert such an effect, the acrylic acid / alkyl methacrylate copolymer needs to be blended in an amount of 0.05% or more as a proportion of the entire hair cosmetic. However, if the blending amount is excessive and exceeds 2%, the hair cosmetic composition is poorly stretched (particularly when the dosage form is creamy) and sticky. The blending amount of the acrylic acid / alkyl methacrylate copolymer is preferably 0.1% or more and 1% or less.

  Specific examples of the acrylic acid / alkyl methacrylate copolymer include “CARBOPOL 1342”, “PEMULEN TR-1”, “PEMULEN TR-2” (all trade names: manufactured by BFGoodrich) and the like. This acrylic acid / alkyl methacrylate copolymer is thickened by neutralization with an alkali agent. Examples of the alkali agent used at this time include inorganic alkali salts such as sodium hydroxide and potassium hydroxide, and basic amino acids such as arginine, but are not limited thereto.

  On the other hand, coconut oil [component (C)] as an oil and fat is an effective component for improving the elongation and applicability of hair cosmetics, reducing the sticky feeling and improving the setting power. In order to exhibit such an effect, the blending ratio of coconut oil needs to be at least 1% as a percentage of the entire hair cosmetic. However, when the blending ratio of coconut oil is excessive, the setting power tends to decrease, so it is necessary to make the ratio to 15% or less in the entire hair cosmetic.

  By the way, in addition to the palm oil described above as oils and fats, shea oil, light liquid paraffin, dioctyl succinate, isopropyl palmitate and the like are also known as hair cosmetics. However, according to the study of the present inventors, among these, especially when only coconut oil is selected and used, the cream-like hair cosmetic composition is improved in elongation and the sticky feeling is improved. It has become clear that the strength can be improved and the peeling of the nail cosmetic can be reduced as much as possible.

  In the hair cosmetic composition of the present invention, the setting power of the hair and the stretchability of the cream are contradictory properties, but in order to exert these properties in a well-balanced manner, waxes such as the above candelilla wax and microcrystalline wax are used. It is also effective to adjust the blending ratio of the class [component (A)] and the coconut oil as the fat into an appropriate range. From such a viewpoint, the blending ratio [(A) :( C)] of (A) candelilla wax and microcrystalline wax and (C) coconut oil is 10: 1 to 1: 4 (mass ratio). Preferred (Example 5 described later).

  That is, when the amount of wax is more than 10: 1 in the above blending ratio [(A) :( C)] [for example, 20: 1], the set power is high but the elongation of the cream is deteriorated and the stickiness becomes sticky. . On the other hand, when the amount of coconut oil is larger than 1: 4 in the above blending ratio [(A) :( C)] [for example 1: 5], the elongation of the cream is improved, but sufficient setting power cannot be obtained.

  In addition to the above components, the hair cosmetic of the present invention can also contain components (additives) that are usually added to hair cosmetics. These additives include proteins, amino acids, UV absorbers, humectants, fats and oils, lanolins, higher alcohols, fluorine compounds, silicones, cationized polymers, surfactants (positive Ionic surfactants, anionic surfactants, nonionic surfactants, amphoteric surfactants), thickening / gelling agents, deodorants, preservatives, chelating agents, pH adjustment Agents, acids / alkalis, solvents, anti-inflammatory agents, fragrances, pigments and the like can be mentioned, and these can be appropriately blended. In addition, the hair cosmetic composition of the present invention can be used for treating hair on a daily basis, and the best dosage form is an emulsion or cream type.

  The hair cosmetic composition of the present invention is assumed to be used in a cream form as a basic dosage form, but its viscosity is suitably about 100 to 30000 mPa · s. That is, when the viscosity of the hair cosmetic is less than 100 mPa · s, the stability of the hair cosmetic is deteriorated, and when it exceeds 30000 mPa · s, the elongation of the hair cosmetic is deteriorated. In addition, the hair cosmetic composition of the present invention exhibits the characteristic that it can reduce the peeling of the nail cosmetic composition during its use, as will be shown in the examples below.

  Next, the present invention will be described more specifically by way of examples. However, the following examples are not intended to limit the present invention, and all modifications can be made without departing from the spirit of the above and following descriptions. To be included in the scope.

  The following items were evaluated for various hair cosmetics (prescription examples) described below.

(Evaluation method of cream elongation)
By 10 expert panelists, sensory evaluation was performed by the following five-step evaluation (evaluation points), the average score of the evaluation points was determined, and the determination was made according to the following criteria.
[Evaluation points]
5 points: Very good 4 points: Good 3 points: Normal 2 points: Bad 1 point: Very bad [Evaluation criteria]
◎: 4 points or more ○: 3 points or more, less than 4 points △: 2 points or more, less than 3 points ×: 1 point or more, less than 2 points

(Preparation of bleached hair)
The hair that was not subjected to any chemical treatment was subjected to the following bleach treatment and used for the following evaluation.

(Bleach processing)
Toner bleach powder EX (powder bleach agent: manufactured by Nakano Pharmaceutical Co., Ltd.) and caradeco oxide EX06 (hydrogen peroxide-based oxidizing agent: manufactured by Nakano Pharmaceutical Co., Ltd.) were mixed at a ratio of 1: 3 (mass ratio). Is applied to the hair in a mass ratio (bleaching agent: hair) of 1: 1, treated at 35 ° C. for 30 minutes, washed with 10% by weight SDS solution (sodium dodecyl sulfate solution), and then Dried.

(Evaluation method for stickiness)
10 expert panelists applied 0.5g of sample (hair cosmetic) to the above-mentioned bleached hair bundle (5.0g, 20cm), and sensory-evaluated and evaluated the following five-step evaluation (evaluation points). The average of the points was determined and judged according to the following criteria.
[Evaluation points]
5 points: very little sticky 4 points: little sticky 3 points: normal 2 points: sticky 1 point: very sticky [Evaluation Criteria]
◎: 4 points or more ○: 3 points or more, less than 4 points △: 2 points or more, less than 3 points ×: 1 point or more, less than 2 points

(Evaluation method of set power)
After 0.2 g of a sample (hair cosmetic) was applied to a hair bundle of bleached hair (1.0 g, 20 cm) left at 20 ° C. and 60% humidity for 24 hours, and wound around a rod having a diameter of 25 mm, It was left to stand at 20 ° C. and 60% humidity for 10 minutes. Thereafter, the curly hair bundle length immediately after removing the rod was measured, and the setting force was calculated by the following formula (1), and evaluated according to the following criteria.
Setting force (%) = 100 × (20−A) / 20 (1)
However, A: Hair bundle length immediately after removing the rod (cm: initial hair bundle length is 20 cm)

[Evaluation criteria]
◎: 50% or more ○: 40% or more, less than 50% △: 30% or more, less than 40% ×: less than 30%

(Evaluation method of set holding power)
After 0.2 g of a sample (hair cosmetic) was applied to a hair bundle of bleached hair (1.0 g, 20 cm) left at 20 ° C. and 60% humidity for 24 hours, and wound around a rod having a diameter of 25 mm, It was left to stand at 20 ° C. and 60% humidity for 10 minutes. The hair bundle set by the above treatment was allowed to stand for 1 hour in a state of being suspended at 30 ° C. and 90% humidity, and then the length of the hair bundle was measured. The hair bundle length in a state of being hung immediately after removing the lot was taken as 100%, and it was evaluated that the set holding power decreased as the hair bundle length after standing for 1 hour increased. The evaluation criteria are as follows.

[Evaluation criteria]
◎: 100% or more, less than 120% ○: 120% or more, less than 140% △: 140% or more, less than 160% ×: 160% or more

(Evaluation method of glossiness)
10 expert panelists apply 0.5g of sample (hair cosmetic) to the hair bundle of hair that has been bleached twice (5.0g, 20cm), and sensory-evaluated by the following five-step evaluation (evaluation points) Then, the average score of the evaluation points was obtained and judged according to the following criteria.

[Evaluation points]
5 points: Very good 4 points: Good 3 points: Normal 2 points: Bad 1 point: Very bad [Evaluation criteria]
◎: 4 points or more ○: 3 points or more, less than 4 points △: 2 points or more, less than 3 points ×: 1 point or more, less than 2 points

(Evaluation method for difficulty in peeling off nail cosmetics)
After applying nail cosmetic (manicure) on the nail and drying, apply 0.3g of the target liquid (hair cosmetic) to half of the nail, leave it at room temperature for 40 minutes, wipe it off with tissue paper, untreated The degree of peeling compared with the part was determined according to the following evaluation criteria. FIG. 1 (drawing substitute photograph) shows a state in which the hair cosmetic is applied to the nails.
○: No peeling
Δ: Slight peeling
×: Most peeling

  The standard of the difficulty of peeling off nail cosmetics is shown in FIG. 2A shows a state without peeling (O), FIG. 2B shows a state with slight peeling (Δ), and FIG. 2C shows a state with most peeling (X). , Respectively.

(Measurement method of viscosity)
Using a B-type viscometer (“BM type”: manufactured by Tokimec Co., Ltd.), the temperature was 30 ° C., the rotor No. 4. Measured under conditions of 30 to 6 rpm for 2 minutes.

[Example 1]
Various hair cosmetics (formulation examples 1 to 6) shown in Table 1 below were prepared and evaluated for each item described above. The results are also shown in Table 1.

  The results of Table 1 can be considered as follows. It can be seen that when the acrylic acid / alkyl methacrylate copolymer is less than 0.05% (Formulation Example 1), the viscosity is low and the stability is poor, so that stickiness occurs and the setting power and glossiness deteriorate. On the other hand, when it exceeds 2% (Prescription Example 6), it is understood that the cream does not stretch well and becomes sticky, and the application to the hair becomes non-uniform, resulting in poor gloss.

[Example 2]
Various hair cosmetics (formulation examples 3, 7 to 10) shown in Table 2 below were prepared, and the above-described items were evaluated. The results are also shown in Table 2. In addition, this prescription example mix | blends changing the kind of fats and oils.

  When the effects of fats and oils are compared, it can be seen that those blended with coconut oil (Formulation Example 3) have the property that the nail cosmetic is difficult to peel off even if it adheres to the nails during application of the hair cosmetic. Moreover, it turns out that the elongation and stickiness of a cream are improved and a setting power is improved by mix | blending coconut oil. Regarding the test results of the difficulty in peeling off the nail cosmetic, as a representative example, FIG. 3 (drawing substitute photo) is shown in prescription example 3 [FIG. 3 (a): ○] and prescription example 8 [FIG. 3 (b): Δ]. The state of the nail cosmetic after apply | coating the hair cosmetic of the formulation example 9 [FIG.3 (c): x] is shown.

[Example 3]
Various hair cosmetics (Prescription Examples 3, 11 to 16) shown in Table 3 below were prepared, and the above-described items were evaluated. The results are also shown in Table 3.

  Regarding the blending amount of coconut oil, when the content was 0.4% or less, the cream was poorly stretched, resulting in stickiness. Moreover, when it mix | blends more than 15%, there exists a tendency for a setting power to worsen. On the other hand, in the example in which coconut oil is not blended at all (Formulation Example 11), there is a tendency that the nail cosmetic is easily peeled off, but in other cases, such a tendency is not observed (Formulation Examples 3, 12 to 16). As for the blending amount of coconut oil, it can be seen that 1% or more and 15% or less are optimal in order for the cream to have good elongation and good set retention.

[Example 4]
Various hair cosmetics (Prescription Examples 17 to 23) shown in Table 4 below were prepared and evaluated for each item described above. The results are also shown in Table 4.

  If the total amount of candelilla wax and microcrystalline wax as waxes is less than 1% (Formulation Example 23), sufficient setting power cannot be obtained, and if it exceeds 30% (Formulation Example 17), the setting power increases. It turns out that the growth of the cream worsens and becomes sticky. As waxes, the total amount of candelilla wax and microcrystalline wax is optimally 1% or more and 30% or less in order to exhibit the performance of having sufficient setting power and good elongation of the cream. I understand.

[Example 5]
Various hair cosmetics (Prescription Examples 24 to 30) shown in Table 5 below were prepared and evaluated for each item described above. The results are also shown in Table 5.

  It can be considered from Table 5 as follows. That is, when the wax amount becomes larger than 10: 1 in the ratio of the total amount of waxes (total amount of candelilla wax and microcrystalline wax) and palm oil (Formulation Examples 24 and 25), the set power is high but the elongation of the cream is increased. It turns out to be worse and sticky. In contrast, when the amount of coconut oil is larger than 1: 4 (Formulation Example 30), it is understood that the cream has good elongation and little stickiness, but sufficient setting power cannot be obtained. In order to obtain a finish with high setting power, good cream elongation and less stickiness, the ratio of the total amount of waxes to palm oil is preferably 10: 1 to 1: 4, more preferably 5: It can be seen that the range of 1-1: 2 is optimal. In this example, arginine was changed to sodium hydroxide as the alkaline agent, but there was no particular problem.

[Example 6]
Various hair cosmetics (Prescription Examples 18, 31 to 42) shown in Tables 6 and 7 below were prepared, and the above-described items were evaluated. The results are also shown in Tables 6 and 7.

  When the ratio of candelilla wax to microcrystalline wax is greater than 9: 1 (prescription example 32), the glossiness is good, but sufficient setting power cannot be obtained, and microcrystallin from 1: 9. It can be seen that when the amount of wax increases (Prescription Example 39), the set force and the set holding force increase, but a good gloss feeling cannot be obtained. In addition, it is understood that it is not sufficient to add a component of candelilla wax or microcrystalline wax alone in order to effectively exert the “setting power” imparting effect without reducing the “shininess” (prescription) Examples 40-42).

It is a drawing substitute photograph which shows the state which apply | coated the hair cosmetics to the nail | claw. It is a drawing substitute photograph which shows the standard of the difficulty of peeling of nail cosmetics. It is a drawing substitute photograph which shows the state of nail cosmetics after apply | coating the hair cosmetics of the formulation examples 3, 8, and 9. FIG.

Claims (5)

  (A) Candelilla wax and microcrystalline wax: 1 to 30% (meaning “mass%”, the same shall apply hereinafter), (B) acrylic acid / alkyl methacrylate copolymer: 0 Hair cosmetics characterized by blending 0.05 to 2% and (C) coconut oil: 1 to 15%.   The blending ratio [(A) :( C)] of (A) candelilla wax and microcrystalline wax and (C) coconut oil is 10: 1 to 1: 4 (mass ratio). Hair cosmetics.   The hair cosmetic composition according to claim 1 or 2, wherein a blending ratio of the candelilla wax and the microcrystalline wax (candelilla wax: microcrystalline wax) in the component (A) is 9: 1 to 1: 9 (mass ratio). .   The hair cosmetic composition according to any one of claims 1 to 3, wherein the viscosity is 100 to 30000 mPa · s.   The hair cosmetic composition according to any one of claims 1 to 4, which exhibits properties capable of reducing peeling of the cosmetic composition for nail during use.