JPH04356413A - Discharging agent for hair - Google Patents

Abstract

PURPOSE:To efficiently remove a color ingredient in hair dyed with a semipermanent hair color containing mainly a tarry pigment as the color ingredient without impairing the hair and discoloring the hair to a brighter color than that of the ground hair. CONSTITUTION:A discharging agent for hair is obtained by blending (A) 2-10wt.% sulfites, preferably sodium sulfite with (B) 2-8 wt.% benzyl alcohol and (C) 1-8 wt.% cationic surfactant, preferably a compound expressed by formula I [R<1> is 12-22C alkyl; R<2> is 12-22C alkyl, CH3 or H; R<3> and R<4> are CH3 or formula II; (n) is 1-5; X is halogen] as an essential ingredient at (3:1) to (1:1) ratio of the ingredients (B):(C) and simultaneously regulating the pH to 7-9. This discharging agent has the above-mentioned effects. Furthermore, a creamy type, comprising a cream base containing higher alcohol and an anionic surfactant as a base and having preferably >=5000cP viscosity is capable of imparting also gloss and excellent hand to the hair itself.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a hair decoloring agent, and more specifically, it is used to effectively decolorize hair that has been dyed with a semi-permanent hair color mainly containing tar-based pigments as a coloring component. The invention relates to a destaining agent.

0002

[Prior Art] Oxidative hair dyes (permanent hair dyes) containing oxidative dyes such as paraphenylene diamine as the main ingredient have been widely used in the past, but in recent years, new types of tar-based dyes have been used as coloring ingredients. Semi-permanent hair colors have been proposed and are rapidly gaining popularity in the market. This semi-permanent hair color is gaining popularity because it can dye black hair, gray hair, and even bleached brown to yellowish brown hair in a variety of colors vividly and glossily. for example,
It can be said to be a hair dye that can be used in a wide range of fields, as you can fashion your hair with a variety of colors such as red, blue, and yellow, and you can also enjoy subtle changes in hair color.

However, when hair is dyed using semi-permanent hair color, no decoloring agent has yet been found that can effectively decolorize the coloring components. For example, when de-staining using conventionally known bleaching agents or bleaching agents, if you try to completely remove the coloring ingredients, the hair's own melanin pigment will be broken down, making the hair color darker than the natural hair color. The drawback is that it becomes too bright. In addition, the permanent waving agent does not break down melanin pigment,
There is also a method of swelling hair with thioglycolic acid to remove coloring components, but this method also has the disadvantage that the hair is damaged due to excessive swelling.

0004

[Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present invention aims to efficiently remove coloring ingredients without damaging hair dyed with semi-permanent hair color, and in particular without changing the color to be brighter than the natural hair color. The purpose of this invention is to provide a method for effectively removing such substances.

[0005]

[Means for Solving the Problems] As a result of various studies to achieve the above object, the present inventor has found that, in particular, in the case of a decoloring agent containing a combination of sulfites, benzyl alcohol, and a cationic surfactant, It has been discovered that coloring components can be efficiently destained without damaging the hair, and that it is also possible to impart shine and a good texture to the hair itself.

[0006] That is, the gist of the present invention is that sulfites,
Contains benzyl alcohol and cationic surfactant,
The present invention also provides a hair decoloring agent having a pH adjusted to 7 to 9. Hereinafter, the content of the present invention will be explained in detail.

The sulfites used in the hair decoloring agent of the present invention are usually alkali metal salts or alkaline earth metal salts of sulfite or bisulfite, such as sodium sulfite, potassium sulfite, magnesium sulfite, and sodium bisulfite. Among these, sodium sulfite is preferred. The amount of this sulfite is usually 2 to 10
% by weight, preferably 3-6% by weight. If the amount used is too small, the decoloring power against the coloring components dyed on the hair will be weak and the color cannot be removed sufficiently.On the other hand, if the amount used is too large, the decoloring power will change. Although there is no such thing, it is not preferable because it causes itching when it adheres to the skin.

[0008] In the present invention, it is essential to contain both benzyl alcohol and a cationic surfactant, but the type of cationic surfactant is usually a quaternary ammonium salt type. For example, a structure represented by the following general formula is preferable. Note that two or more types of cationic surfactants may be used in combination.

[0009]

[Chemical formula 1]

(wherein, R1 is an alkyl group having 12 to 22 carbon atoms, R2 is an alkyl group having 12 to 22 carbon atoms, a methyl group, or a hydrogen atom, and R3 and R4 are a methyl group or (
CH2-CH2-O)nH (n=1-5), X represents a halogen atom. ) The amount of benzyl alcohol blended is usually 2 to 8% by weight, preferably 3 to 6% by weight. On the other hand, the amount of cationic surfactant is usually 1 to 8
% by weight, preferably 2-5% by weight. In the present invention, the ratio of benzyl alcohol to cationic surfactant used is preferably in the range of 3:1 to 1:1. If the amount of benzyl alcohol used is too small, the destaining power will be weak, and if it is too much, the destaining effect will not improve much and the odor will be strong, and when mixed with the cream base, it will cause separation of oil components. There is a fear. Furthermore, if the amount of cationic surfactant used is too small, not only will the de-staining power be weak, but also the benzyl alcohol will not be mixed uniformly into the cream base, whereas if it is too large, the de-staining power will not increase. , which is undesirable because it worsens the texture of the hair. Furthermore, if the ratio of cationic surfactant to benzyl alcohol is low, the stability of the product will be poor, especially when preparing a creamy hair decoloring agent, and a good decoloring effect will not be obtained. .

The pH of the hair decoloring agent of the present invention must be adjusted to a range of 7 to 9. If the pH is less than 7, sulfites will decompose and sulfur dioxide gas will be generated, and if the pH exceeds 9, the decoloring power will decrease and there is a risk of damaging the hair, which is not preferable. Therefore, it is sufficient that the pH of the prepared composition is within the above range, but if it is outside this range, it is necessary to adjust the pH to a predetermined value by adding a known pH adjuster such as citric acid or sodium hydroxide. There is.

The form of the destaining agent of the present invention may be a solution type or an emulsion type, but in this case, a large amount of solvent is required to uniformly solubilize the above-mentioned benzyl alcohol and sulfites. Cream-type products that require less solvent are generally preferred because they do not have a favorable effect on the hair. To prepare a cream type destaining agent, the above components of the present invention are usually blended into a cream base and mixed uniformly, but the viscosity of the destaining agent of the present invention is usually 5000 cps or more. preferable. In the present invention, the cream base is preferably a cream base obtained by emulsifying in the presence of a higher alcohol and an anionic surfactant. The higher alcohol used here usually includes those having 12 to 22 carbon atoms. The amount of higher alcohol used in this case is usually 5 to 20% by weight, preferably 7 to 15% by weight. On the other hand, examples of anionic surfactants include alkyl sulfate types, alkyl ether sulfate types, alkyl sulfosuccinate types, fatty acid salt types, etc., and the amount used is usually 0.1 to 10% by weight. It is.

Furthermore, in the destaining agent of the present invention, a water-soluble alcohol such as ethanol or isopropyl alcohol may be used as a solvent in a necessary amount in order to obtain a uniform composition. Furthermore, as necessary, paraffins, lanolin derivative esters, silicone oils, etc., fats and oils such as animal and vegetable oils, polyhydric alcohols such as propylene glycol and glycerin, anti-dandruff agents, hair growth agents, and preservatives such as parabens are added. Water-soluble polymers such as xanthan gum and guar gum, cationic polymers such as cationized cellulose, pearlizing agents such as glycose esters, fragrances, and pigments can also be blended.

The decoloring agent of the present invention is particularly effective for decolorizing hair that has been dyed using a semi-permanent hair color containing a tar pigment as a coloring component. The tar-based pigment that is the coloring component of this semi-permanent hair color is
Usually, they are of the type triphenylmethane dyes, azo dyes, quinoline dyes, thiazole dyes, xanthine dyes, indigoid dyes, acridine dyes, azine dyes, stilbene dyes, oxazine dyes, anthraquinone dyes, etc.

[0015] As for the method of using the decoloring agent of the present invention, the decoloring agent is usually applied uniformly to the hair, preferably at 30°C.
What is necessary is just to wash|clean after holding|maintaining for about 10-30 minutes under heat retention of -60 degreeC.

[0016]

[Examples] Next, the present invention will be explained in more detail with reference to Examples, but the present invention is not limited to the description of the Examples unless it exceeds the gist thereof. Example 1 A jelly-like destaining agent (2,000 cps) was prepared by uniformly dissolving sodium sulfite, benzyl alcohol, and cetyltrimethylammonium chloride as a cationic surfactant in the proportions shown in Table 1 in a base solution having the component composition shown below. ) was prepared and used to examine its decoloring power, black hair decolorizing ability, hair texture, and storage stability, and the results are shown in Table 1. <Base A> Cationized cellulose
2.0% by weight
(Leoguard G)
Sodium lauryl ether sulfate
2.0 weight〃 Isopropyl alcohol 15.
0 weight water

Remaining Amount Example 2 In Example 1, a cream base was prepared with the component composition shown below, and sodium sulfite, benzyl alcohol, and cetyltrimethylammonium chloride were uniformly mixed in the same proportions to create a cream-like destaining agent. (15,000cps
) was prepared and subjected to a similar test, and the results are shown in Table 1. <Base B> Stearyl alcohol
10% by weight
Methylphenylpolysiloxane 1.0
〃 Polyoxyethylene (15, E, O) cetyl ether 2.0 〃
sodium lauryl sulfate
0.
5 Lauric acid

2.0 〃
water
Remaining Amount Comparative Examples 1 to 5 In Example 2, as shown in Table 1, a similar test was conducted by omitting some of the ingredients of the present invention or by changing the pH of the composition. The results are shown below. Comparative Examples 6 to 8 The results of similar tests conducted using a commercially available remover, bleaching agent, or first perm agent as a de-staining agent are shown below. The following commercially available products were used.

Remover: Simone Remover (manufactured by Hoyu Co., Ltd.) Bleach agent: It's Love Light
(Same as above) Perm first agent: Simone Trating Cold 303 (same as above)

[0018]

[Table 1]

[0019]

[Evaluation test method] (1) Dedying power test Hair bundles (approximately 2 g of human hair mixed with gray hair and goat hair) were dyed with semi-permanent hair color (Session BR Shiny S
B: Hair was dyed using a hair bundle (manufactured by Houko Co., Ltd.), and 10 g of a destaining agent was evenly applied to the dyed hair bundle (2 g), wrapped in aluminum foil, and left at 50° C. for 20 minutes. Next, the hair bundle is removed from the foil, left at room temperature for 5 minutes, and then washed with lukewarm water (40°C). The destaining effect of this hair bundle is judged according to the following criteria. <Judgment Criteria>◎; The color fades very well and gray hair is very noticeable in human hair ○;
The color fades well and gray hairs are noticeable △; There is not much discoloration and gray hairs are a little noticeable ×; There is little discoloration and gray hairs are not noticeable (2) Bleaching test for black hair In the test (1) above, black hair itself Determine the presence or absence of decolorization.

○=Black hair is not bleached.×=Black hair is bleached. , at 50°C for 20 minutes, then at room temperature (approximately 20°C) for 5 minutes,
The washing operation was repeated five times, and 10 panelists compared the texture of the hair strands, judged them based on the criteria below, and selected the answer with the most responses. <Judgment Criteria>◎; Excellent shine and combability, much better than untreated hair ○;
Good shine and combability, slightly better than untreated hair △; Shine and combability are the same as untreated hair ×; Dry and rough, worse than untreated hair (4) Storage stability Judgment is made based on the results obtained when the dye is sealed in a glass bottle and stored at 40°C for 6 months.

○ = Almost no change × = Separation of oil components was observed or sulfur dioxide gas was generated

[0022]

Effects of the Invention The hair decoloring agent of the present invention is extremely effective as a decoloring agent for hair dyed with a semi-permanent hair color containing a tar pigment as a coloring component. In short, it is preferable because not only can efficient decolorization be performed without damaging the hair, but also, especially when it is in the form of a cream, it can also impart luster and a good texture to the hair itself.

Furthermore, it has a good effect on removing dirt from the scalp during semi-permanent hair coloring. It also has the effect of slightly lightening hair that has become too dark due to multiple layers of hair or permanent hair dye.

Claims (4)

[Claims] 1. A decoloring agent for hair, which contains sulfites, benzyl alcohol, and a cationic surfactant, and has a pH adjusted to 7 to 9. [Claim 2] The blending amount of benzyl alcohol is 2 to 8.
% by weight, the amount of cationic surfactant is 1 to 8% by weight, and the ratio of both is 3:1 to 1:1.
The hair decoloring agent according to claim 1, characterized in that: 3. The hair decoloring agent according to claim 1, which is based on a cream base containing a higher alcohol and an anionic surfactant. 4. The hair decoloring agent according to claim 1, wherein the composition prepared from a cream base has a viscosity of 5000 cps or more.