JPH0699289B2 - Skin protectant - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a skin protection agent, and more particularly, to a dye for preventing contamination of a hair dye on the peripheral portion of the hair and hands during hair dyeing operation. The present invention relates to a skin protection agent for hair treatment.

[Prior Art and its Problems] In recent years, hair dyes have come to be widely used according to the taste of each person regardless of age or sex. The reason for this is that, along with diversification of consumer consciousness, excellent hair dyes that can be easily dyed at home have been developed and commercialized. As these hair dyes, various types such as oxidative hair dyes and acid hair dyes are known.

However, in particular, when a general person dyes hair at home, the hair dye is often attached to the skin other than the hair, such as the hairline and hands, and therefore the hair dye is contaminated. It may occur. Since the hair dye that stains the skin cannot be easily removed with soap, it is necessary to use a remover containing an organic solvent. However, the use of the remover has strong drawbacks that the skin is irritated and the skin is damaged or dry.

Therefore, a method of preventing contamination of the hair dye at the time of the hair dyeing operation by applying a milky lotion or cream containing an oily component to the periphery of the hair or the hands in advance can be considered. However, conventionally, in the case of commercially available emulsions and creams,
There is no hair dye with sufficient anti-staining effect. Some of them, for example, have a certain degree of anti-staining effect on acidic hair dyes, but have no effect on oxidative pollutants, and vice versa. Therefore, there has been a demand for the appearance of a skin protection agent having a high anti-contamination effect for various types such as oxidative hair dyes and acid hair dyes.

[Problems and Solutions of the Invention] In view of the above situation, the present inventor effectively prevents contamination of the hair dye around the hair and hands during hair dyeing operations using various types of hair dyes. As a result of various studies aimed at obtaining a skin protection agent capable of achieving the above, it was found that the object of the present invention can be achieved by adding a reducing agent to a conventionally known emulsion or cream containing an oily component, thereby completing the present invention. Came to do.

That is, the gist of the present invention resides in a skin protection agent characterized by containing an oily component and a reducing agent.

Hereinafter, the configuration of the present invention will be described in detail.

The oily component to be targeted in the present invention is not particularly limited as long as it is conventionally known as an oily component to be blended in emulsions and creams, and usually waxes, fats and oils,
Hydrocarbons, higher alcohols, higher fatty acids, esters and the like can be used. Specific examples thereof include waxes such as carnauba wax, candelilla wax, lanolin, or a derivative thereof, beeswax, spermaceti wax, jojoba oil, and the like; castor oil or a derivative thereof, hydrogenated castor oil or a derivative thereof, mokuro, coconut oil. Oils and fats such as mink oil, beef tallow, persic oil, sesame oil, olive oil, cacao butter, avocado oil, almond oil; paraffin, liquid paraffin, liquid isoparaffin, petrolatum, microcrystalline wax, ceresin, gelled hydrocarbon, squalane, Hydrocarbons such as squalene and pristane; cetyl alcohol, oleyl alcohol, lauryl alcohol, stearyl alcohol, isostearyl alcohol, cetostearyl alcohol, myristyl alcohol, lanolin alcohol, cholesterol, Shirudekanoru, higher alcohols, such as octyl decanol;
Esters such as myristyl lactate, cetyl lactate, hexyldecyl dimethyloctanoate, hexyl laurate, isopropyl myristate, myristyl myristate, octyldodecyl myristate, isopropyl palmitate, butyl stearate, decyl oleate; lauric acid, myristic acid , Palmitic acid, stearic acid, behenic acid, oleic acid, lanolinic acid, isostearic acid,
Examples thereof include higher fatty acids such as linoleic acid, ricinoleic acid, and levulinic acid.

Of these, carnauba wax, candelilla wax, beeswax, hydrogenated castor oil, marrow, paraffin, liquid paraffin, petrolatum, microcrystalline wax, ceresin, gelled hydrocarbon, stearyl alcohol, lanolin alcohol, cetyl lactate, and myristyl myristate are preferable.

The blending amount of the oil and fat component can be determined depending on the form of the skin protecting agent and the blending amount of other blending agents described later,
Usually, it is selected from the range of 1 to 99% by weight, preferably 5 to 95% by weight. The form of the skin protecting agent is usually preferably creamy and can be prepared by emulsifying an oily component and water according to a conventional method.

In the background protective agent of the present invention, it is essential to add a reducing agent, but as the reducing agent, usually,
Thioglycolic acid, cysteine, ascorbic acid, erythorbic acid, or derivatives thereof (ascorbyl stearate, ascorbyl palmitate, ascorbyl dipalmitate, sodium ascorbate, disodium ascorbate sulfate, sodium erythorbate, ammonium thioglycolate, Cysteine hydrochloride, acetyl cysteine, etc.), sodium sulfite,
Sodium bisulfite, reducing sugar (maltitol, lactose,
Glucose, fructose, etc.), thiosalicylic acid, salicylaldehyde, sodium hypophosphite, sorbic acid and the like. Among these reducing agents, cysteine, sodium sulfite, sodium hydrogen sulfite, ascorbic acid, erythorbic acid and maltitol are particularly preferable.

The content of the reducing agent is usually 0.1 to 60% by weight, preferably 1
It is 0 to 40% by weight. If the amount used is too small, it is not possible to sufficiently prevent the hair from being contaminated by the hair dye. On the contrary, if the amount is too large, the skin may be adversely affected.

Furthermore, it is desirable to add a moisturizer and a thickener to the protective agent of the present invention, if necessary. Moisturizers include, for example, glycerin, propylene glycol, sorbit, polyethylene glycol, and the like, and thickeners include, for example, carboxymethyl cellulose,
Examples thereof include polyvinyl alcohol, carboxyvinyl polymer, hydroxyethyl cellulose, silicone oil, sodium polyacrylate, xanthan gum, tragacanth gum, sodium alginate, pectin and quince seed gum. Further, known additives such as surfactants, bactericides, preservatives, and fragrances may be appropriately added.

The skin protecting agent of the present invention is extremely effective in preventing skin contamination of the hair dye during the hair dyeing operation. Therefore, when the hair dyeing operation is performed after applying the protective agent of the present invention to the area around the hair to be dyed, hands, etc. in advance, the treated skin is not contaminated at all, and the hair dye is dyed by water dyeing or the like. Can be easily removed.

[Example 1] Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to the description of the following examples as long as the gist thereof is not exceeded.

(Preparation of Protective Agent) The following three kinds of protective agents (A to C) of the present invention and corresponding protective agents (A ′ to C ′) were prepared.

<Protective agent A (product of the present invention)> Stearic acid 10% by weight Stearyl alcohol 5 〃 Butyl stearate 10 〃 Glycerin monostearate 3 〃 Propylene glycol 8 〃 Glycerin 5 〃 Cysteine (reducing agent) 10 〃 Purified water 100 Purified water Add propylene glycol and glycerin to 70 ℃
Dissolve by heating. Stearic acid, stearyl alcohol, butyl stearate, glycerin monostearate are mixed and heated, and the resulting mixture is emulsified,
Cool to 40 ° C and add cysteine.

<Protective agent A ′ (control product)> In the preparation of protective agent A, cysteine was not added.

<Protective agent B (product of the present invention)> Vaseline 63.5% by weight Beeswax 5 〃 Carnauba wax 1 〃 Cetanol 5 〃 Maltitol (reducing agent) 25 〃 Methyl paraben 0.5 〃 100 After heating and melting the ingredients other than maltitol, 40 ℃
Cool to. Next, finely pulverized powdered maltose is kneaded.

<Protective agent B '(control product)> In the preparation of protective agent B, no maltose was added.

<Protective agent C (product of the present invention)> Paraffin 20% by weight Liquid paraffin 50〃 Sodium sulfite 30〃 Paraffin and liquid paraffin are heated and melted at 80 ° C.
Cool to 40 ° C. Next, finely ground sodium sulfite is kneaded.

<Protective agent C '(control product)> No sodium sulfite was added.

[Test Example] Each of the protective agents A to C and A'to C'prepared above was applied to the upper arm, and then an oxidative hair dye or an acidic hair dye was applied to the upper arm, and immediately adjacent thereto. Similarly, apply a hair dye to the part not covered with the protective cream, and after 20 minutes, wash it off with soap. Then, by comparing the portions to which the protective cream was applied and the portions to which the protective cream was not applied, the background protection effect was compared according to the following criteria, and the results shown in Table 1 were obtained.

(Judgment Criteria) A: No dyeing is observed.

〇… Remarkably less dyeing than the part without the protective cream applied, and the effect of protecting the background is recognized.

Δ: Slightly less dyeing than the part to which the protective cream is not applied, and a slightly protective effect on the background is recognized.

X: Dyeing is almost the same as the part to which the protective cream is not applied, and the background protection effect is not recognized.

Note 1) Composition of oxidative hair dye p-phenylenediamine 2.0% by weight p-aminophenol 0.2 〃 pyrogallol 0.2 〃 resorcin 1.6 〃 oleic acid 20.0 〃 polyoxyethylene oleyl ether 15.0 〃 isopropyl alcohol 10.0 〃 ammonia (28%) 10.0 〃 Make up to 100% with purified water.

This is mixed with a 6% aqueous solution of hydrogen peroxide for use.

Note 2) Composition of acidic hair dye Black No. 401 0.1% by weight Red No. 206 0.1 〃 Brown 201 No. 0.2 〃 Benzyl alcohol 10.0 〃 N-Methylpyrrolidone 15.0 〃 Hydroxyethyl erulose 1.0 〃 Citric acid 1.0 〃 100% with purified water And

Example 2 In the protective agent B of Example 1, microcrystalline wax is used instead of petrolatum, hydrogenated castor oil is used instead of beeswax, candelilla wax is used instead of carnauba wax, lanolin alcohol is used instead of cetanol, and erythorbic acid is used instead of maltitol. Was used, the same excellent effect of protecting the background as that of the protective agent B was obtained.

Example 3 In protective agent C of Example 1, when gelled hydrocarbon was used instead of paraffin and liquid paraffin, and ascorbic acid was used instead of sodium sulfite, the same excellent background protection effect as that of protective agent C was obtained. It was

Example 4 In the protective agent B of Example 1, ceresin was used in place of petrolatum, cetyl lactate in place of beeswax, myristyl myristate in place of carnauba wax, palmitic acid in place of cetanol, and sodium sulfite in place of maltitol. However, as in the case of the protective agent B, an excellent background protection effect was obtained.

[Effects of the Invention] According to the background protective agent of the present invention, since a reducing agent is contained, when performing hair dyeing operation using each type of hair dye such as oxidative hair dye or acid hair dye. This is preferable because it can effectively prevent the hair dye from being contaminated around the hair and around the hair.

Claims (1)

[Claims] 1. A skin protection agent comprising an oily component and a reducing agent.