JP6513428B2 - Hair protection skin protectant - Google Patents

Description

  The present invention is a skin protecting agent at the time of dyeing, and by applying it to the skin around hair, hair, neck, ears, etc. before hair dyeing, the dyeing of the skin by the hair dye is prevented, and dyeing occurs. It relates to a skin protectant that does not inhibit hair.

  Generally, when hair is dyed with permanent hair dye compounded with oxidation dye or semi-permanent hair dye compounded with acid dye, a cream type hair dye may be applied to the hair with a brush or foam may be directly applied by hand. It is practiced to apply a type of hair dye to the hair. However, in the hairline portion, not only the hair but also the hair dye adheres to the skin, and in the foam-type hair dye, it drips during standing, and the hair dye adheres to the face circumference, neck, etc. It is often seen that the skin stains. Therefore, in order to prevent such a thing, it is necessary to apply a skin protection agent before dyeing.

  A variety of such skin protection agents have been proposed. For example, the thing which has only liquid paraffin as a main component is proposed (refer patent document 1). However, such liquid dosage forms are prone to dripping and have a disadvantage of poor usability. In addition, although the liquid dosage form has less hair dye inhibition, the effect of preventing dyeing of the skin by the hair dye is weak.

  In addition, it has been proposed to use a gelling agent, that is, dextrin fatty acid ester, behenic acid / glyceryl eicoate, etc., to those mainly comprising petrolatum or liquid paraffin (see Patent Document 2). However, although the skin protection agent proposed by patent document 2 can prevent the dyeing | staining of the skin by a hair dye, there existed a problem which inhibits a hair coloring and a color becomes thin.

  Furthermore, those containing a vegetable oil (see Patent Document 3), polysiloxanes (see Patent Document 4), a super absorbent polymer (see Patent Document 5) and a polyglycerin fatty acid ester (see Patent Document 6) have been proposed. However, these skin protecting agents have excellent functions in cleansing properties, handling properties, protective functions against the skin and non-inhibitory properties of hair, but they are not excellent in all functions.

  As described above, the conventional skin protective agents can prevent the dyeing of the skin by the hair dye, and there is nothing that does not inhibit the hair dyeing. It is desirable to develop a skin protection agent that is easy to apply to the skin, can be easily washed off after hair dyeing, and prevents the dyeing of the skin by the hair dye, but does not inhibit the hair dyeing.

Japanese Patent Application Publication No. 2004-99516 Patent No. 3876208 gazette Patent No. 4372964 Japanese Patent Application Laid-Open No. 2006-56848 Japanese Patent Application Publication No. 2007-51074 JP 2011-26258 A

  An object of the present invention is to provide a skin protection agent which is easy to apply to the skin, can be easily washed out after hair dyeing, prevents the dyeing of the skin by the hair dye, and does not inhibit the hair dyeing.

  In view of such circumstances, the inventor of the present application has intensively found that (A) the content of vaseline is 40 to 75% by weight, the content of (B) liquid paraffin is 10 to 30% by weight, and (C) microcrystalline wax Containing 5 to 30% by weight of (D) polyoxyethylene glycerin fatty acid ester, (E) polyoxyethylene alkyl ether and / or polyoxyethylene hydrogenated castor oil, and having a mixed HLB value of 6.5 to 12 The present invention was completed by finding that certain skin protective agents are easy to apply to the skin, can be easily washed off after hair dyeing, and do not inhibit hair dyeing while preventing the dyeing of the skin by the hair dyes.

The skin protecting agent of the present invention is excellent in operability at the time of application and is easy to wash after dyeing, and
It was excellent without preventing the dyeing of the skin by the hair dye and without inhibiting the hair dyeing.

The component (A) petrolatum (preferably white petrolatum) used in the present invention may be one which is usually used in cosmetics and does not need to be special. The melting point is about 38 to 60 ° C.
The content of petrolatum is 40 to 75% by weight, preferably 65 to 75% by weight.

The component (B) liquid paraffin used in the present invention does not have to be special.
The content of liquid paraffin is 10 to 30% by weight, preferably 10 to 20% by weight.
In the present invention, low viscosity liquid paraffin (11.7 to 15.7 mm ² / s 37.8 ° C.) and high viscosity liquid paraffin (74.0 to 88.0 mm ² / s 37.8 ° C.) Although any of these can be used, low viscosity liquid paraffin is preferable in terms of fluidity and lubricity.

The component (C) microcrystalline wax which has a characteristic of having fine crystals and a high melting point and preventing perspiration due to separation of liquid oil because the whole hardness is lowered and the stability is deteriorated due to the increase of ambient temperature. Is preferably contained. The microcrystalline wax has a melting point of about 60 to 85 ° C., and may be one usually used for cosmetics, and it need not be special.
The content of microcrystalline wax is 5 to 30% by weight, preferably 10 to 15% by weight.

Component (D) polyoxyethylene glycerine fatty acid ester is a nonionic surfactant having a condensate of polyoxyethylene glycerin as a hydrophilic group and a fatty acid as an oleophilic group (hereinafter, PEG means polyoxyethylene). Specific examples of polyoxyethylene glycerol fatty acid ester include, for example, PEG-5 glyceryl isostearate, PEG-8 glyceryl isostearate, PEG-10 glyceryl isostearate, PEG-15 glyceryl isostearate, PEG-20 glyceryl isostearate, tri PEG-10 glyceryl isostearate, PEG-20 glyceryl triisostearate, PEG-30 glyceryl triisostearate, PEG-40 glyceryl triisostearate, PEG-20 glyceryl diisostearate, PEG-10 glyceryl stearate, PEG tristearate 20 glyceryl, (capryl / capric acid) PEG-8 glyceryl and the like can be exemplified.
Among these, PEG glyceryl isostearate is preferable, and PEG 8 glyceryl isostearate is more preferable.

  Component (E) is a polyoxyethylene alkyl ether and / or polyoxyethylene hydrogenated castor oil. As polyoxyethylene alkyl ether, for example, PEG (2) cetyl ether, PEG (6) cetyl ether, PEG (10) cetyl ether, PEG (2) stearyl ether, PEG (4) stearyl ether, PEG (7) oleyl Ether, PEG (10) behenyl ether and the like can be mentioned. As polyoxyethylene hydrogenated castor oil, for example, PEG-10 hydrogenated castor oil, PEG-20 hydrogenated castor oil, PEG-30 hydrogenated castor oil, PEG-40 hydrogenated castor oil, PEG-50 hydrogenated castor oil Etc. In the present invention, one or more of these may be used in combination as appropriate. Among these, PEG cetyl ether and PEG stearyl ether are preferable, and PEG (2) cetyl ether and PEG (2) stearyl ether are more preferable.

The mixed HLB value of the nonionic surfactant component used in the present invention is 6.5 to 12, preferably 9 to 11. When the mixed HLB value is less than 6.5 or greater than 12, the ease of washing after application to the skin and the non-inhibitory property of hair dyeing deteriorate. The HLB value of the surfactant component that can be used in the present invention is PEG-8 glyceryl isostearate (HLB = 12.9), PEG-20 glyceryl isostearate (HLB = 15.6), PEG (2) Cetyl ether (HLB = 8), PEG (2) stearyl ether (HLB = 8), PEG (2) oleyl ether (HLB = 7.5), PEG-10 hydrogenated castor oil (HLB = 6.5), PEG -20 hydrogenated castor oil (HLB = 10.5), sorbitan stearate (HLB = 4.7), polyglyceryl isostearate-10 (HLB = 12.0).

  The total content of component (D) and component (E) in the present invention is preferably 1 to 10% by weight, more preferably 3 to 6% by weight.

A higher alcohol having a melting point of 50 ° C. or higher may be added to improve the thermal stability and adjust the hardness. Preferred is behenyl alcohol.
As addition amount, about 0.5 to 5 weight% of the whole is preferable.

  Furthermore, an antioxidant such as tocopherol may be mixed.

  In the skin protection agent of the present invention, in addition to the above components, any component used for ordinary cosmetics can be blended within the range that the intended effect is not impaired. For example, solvents, oils, surfactants, moisturizers, preservatives, thickeners, coloring agents, flavoring agents, anti-inflammatory agents and the like can be mentioned. However, it is not limited to these examples.

  Next, the present invention will be described in more detail by way of examples. However, the present invention is not limited by these. In addition, content is weight%.

The oxidation hair dye and acid hair dye used in the test were prepared as follows.
(Oxygenized hair dye first agent)
(Component) (wt%)
1. Meta-aminophenol 1.5
2. Para-phenylenediamine 3.0
3. Paraaminophenol 0.2
4. Resorcinol 0.3
5. Anhydrous sodium sulfite 0.1
6. L-ascorbic acid 0.5
7. Stearyl alcohol 8.0
8. Paraffin wax 4.0
9. Polyoxyethylene cetyl ether 5.0
10. Ethylenediaminetetraacetic acid tetrasodium 1.0
11. Monoethanolamine (70%) 5.0
12. Refined water residue (oxidant hair dye second agent)
(Component) (wt%)
1. Hydrogen peroxide (35%) 8.0
2. Setanol 2.0
3. Setostearyl alcohol 3.0
4. Polyoxyethylene Stearyl Ether 3.0
5. Hydroxyethanediphosphonic acid 0.2
6. Citric acid 0.5
7. Sodium citrate 0.001
8. Purified Water Residue In the evaluation method described below, a mixture of the first agent and the second agent of the oxidation hair dye in the composition shown above in a ratio of 1: 1 is used.

(Acid hair dye)
(Component) (wt%)
1. Orange No. 205 0.5
2. Benzyl alcohol 5.0
3. Ethanol 20.0
4. Hydroxyethylcellulose 3.0
5. Citric acid 2.0
6. Refined water residue

According to the contents shown in Tables 1 and 2, all the components were dissolved by heating to 80 ° C. or more, and then cooled while stirring to 30 ° C. to obtain a skin protective agent.
The results are shown in Table 1 and Table 2.

The ease of application, the ease of washing off, and the skin protective effect of the skin protective agents described in Tables 1 and 2 were evaluated by the following methods.
Evaluation method 1. 0.1 g of each skin protectant was weighed and applied to the inside of the forearm in a range of 2 cm × 2 cm, and the oxidized hair dye and the acid hair dye were uniformly applied to that part and the uncoated part of the skin protectant.
2. It was left to stand at room temperature for 30 minutes.
3. After 30 minutes, the skin protectant, the oxidative hair dye and the acidic hair dye were washed off with a shampoo, and the skin protectant-coated portion and the non-coated portion were compared and evaluated.

(1) Ease of application (evaluation criteria)
:: very easy to stretch ○: easy to stretch :: slightly hard to stretch ×: hard to stretch (2) ease of washing off (evaluation criteria)
:: Completely washed away, no stickiness at all ○: somewhat difficult to wash away, but no sticky feeling felt Δ: somewhat difficult to rinse, sticky feeling felt x: difficult to rinse, quite sticky feeling (3) skin Protective effect (evaluation criteria)
:: There is no dyeing, and the dyeing prevention effect is strongly recognized ○: The dyeing is slight, but the dyeing prevention effect is recognized. Δ: The dyeing is thin, the dyeing prevention effect is Almost not recognized x: The dye has been dyed badly, and the dye preventing effect is not recognized at all

The non-inhibitory properties of the hair protection of the skin protective agents described in Tables 1 and 2 were evaluated by the following methods.
Evaluation method 1. 0.3 g of each of the skin protective agents shown in Tables 1 and 2 was weighed, and uniformly applied to half of the hair bundle of human hair gray hair (100% gray hair).
2. Oxidized hair dye and acid hair dye were applied with a brush.
3. After the application, it was left for 30 minutes in a 25 ° C. thermostat.
4. After 30 minutes, the hair bundle was washed with a shampoo, and after drying, the color depth of the stain of the skin protection agent applied portion and the unapplied portion was compared and evaluated.

(4) Hair dye inhibition (evaluation criteria)
:: The entire hair bundle has a uniform color, and no inhibition of hair coloring is observed ○: The color of the hair bundle at the part where the skin protection agent is applied is slightly thinner than the uncoated part, and the inhibition of hair coloring is slight △: The color of the hair bundle at the part coated with the skin protective agent is thinner than that at the non-coated part, and the inhibition of the hair coloring is observed. X: The hair bundle at the part coated with the skin protective agent hardly stains Strong inhibition of hair

  In Table 1, when the skin protecting agents of the present invention of Examples 1 to 12 were used, they were easy to apply, easy to wash off, showed a sufficient protective effect on the skin, and did not inhibit hair dyeing. . On the other hand, the skin protecting agents of Comparative Examples 1 to 5 were inferior in ease of application or ease of washing off as in Examples 1 to 12, or inhibited hair dyeing.

In Table 2, Examples 13 to 16 which contain polyoxyethylene glycerine fatty acid ester, polyoxyethylene alkyl ether and / or polyoxyethylene hydrogenated castor oil and have a mixed HLB value of 9 to 12 are skin protective agents. It was easy to apply, easy to wash off, showed a sufficient protective effect on the skin, and did not inhibit hair coloring.
On the other hand, when (D) and / or (E) is not contained (comparative examples 6 to 12) or when HLB deviates from 9 to 12 (comparative examples 13 and 14 ), the ease of washing off is inferior, I blocked my hair.

ADVANTAGE OF THE INVENTION According to this invention, it is easy to apply | coat to skin, can be wash | cleaned off easily, and the dyeing | staining of the skin by a hair dye can be prevented, and also the skin protection agent which does not inhibit hair dyeing can be provided.

Claims (4)

The following components (A) to (E):
(A) vaseline content 40 to 75% by weight
(B) Liquid paraffin content 10 to 30% by weight
(C) microcrystalline wax content 5 to 30% by weight
(D) polyoxyethylene glyceryl isostearate having an average added mole number of ethylene oxide of 8: 0.2 to 6.0% by weight
(E) Polyoxyethylene alkyl ether content 0.2 to 6.0% by weight
Skin protectant, wherein the containing and mixing HLB value of 9-12.   The skin protection agent according to claim 1, wherein the total content of component (D) and component (E) is 1 to 10% by weight.   The skin protective agent according to claim 1 or 2, wherein component (E) is polyoxyethylene cetyl ether or polyoxyethylene stearyl ether.   The skin protection agent according to any one of claims 1 to 3, wherein the average added mole number of ethylene oxide of the component (E) is 2.