JPH08239309A - Stain remover - Google Patents

Abstract

PURPOSE: To obtain a stain remover highly effective for hair dye stains on the skin and low in skin irritancy, containing urea and/or thiourea and a sulfite and/or alkaline component. CONSTITUTION: This stain remover with pH 8-12 contains pref. 0.1-20wt.% of urea and/or pref. 0.1-15wt.% of thiourea and 0.1-20wt.% of a sulfite (e.g. sodium sulfite) and/or 0.01-10wt.% of an alkaline component (e.g. triethanolamine). This remover is sufficiently effective on the skin stained with a hair dye such as an oxidative, acidic or interim hair dye through merely lightly wiping off using a piece of sanitary cotton containing it, causing no skin irritancy and developing no skin rash or dryness after its use.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a dye removal agent.
More specifically, it relates to a dyeing / removing agent for removing stains when a hair dye adheres to the skin.

[0002]

2. Description of the Related Art Conventionally, in order to remove stains on the hair dye adhered to the skin, an organic solvent such as benzyl alcohol and a cleaning agent such as a nonionic surfactant, an anionic surfactant or a cationic surfactant are combined. Dye removal agents, cleansing creams, shampoos, soaps, etc. were used.

[0003]

[Problems to be Solved by the Invention] However, the removal effect is not sufficient, and there is a drawback that the skin needs to be rubbed many times and the skin becomes red. Further, those containing an organic solvent, a cationic surfactant or an abrasive in order to enhance the removal effect have strong problems of irritation to the skin and make the skin bulky after use.

[0004]

[Means for Solving the Problem] Therefore, the present inventor can solve the above-mentioned drawbacks by blending (A) urea and / or thiourea, and (B) sulfite and / or an alkaline component. Found.

The amount of urea used in the present invention is 0.
1 to 20% by weight, and if less than 0.1% by weight,
The removal effect and skin irritation suppression effect are not sufficient. 20
Even if it is more than wt%, no further effect can be expected. The lower limit of the blending amount is preferably 1% by weight, and by blending 1% by weight or more, more excellent removing effect and skin irritation suppressing effect can be obtained. The upper limit is preferably 15% by weight, and when it exceeds 15% by weight, the removal effect and the skin irritation suppression effect are less increased.

The content of thiourea is 0.1 to 15% by weight.
If it is less than 0.1% by weight, the removing effect and the skin irritation suppressing effect are not sufficient. Even if it exceeds 15% by weight, no further effect can be expected. The lower limit of the blending amount is preferably 1% by weight, and by blending 1% by weight or more, more excellent removing effect and skin irritation suppressing effect can be obtained. The upper limit is preferably 10% by weight, and when it exceeds 10% by weight, the removal effect and the skin irritation suppression effect are less increased.

Examples of the sulfite used in the present invention include sodium sulfite, potassium sulfite, ammonium sulfite and magnesium sulfite, and among them, sodium sulfite is particularly preferable from the viewpoint of dyeing removal effect. The blending amount is 0.1 to 20% by weight, and if it is less than 0.1% by weight, the removing effect is not sufficient. Even if it is more than 20% by weight, no further effect can be expected. In addition,
The lower limit of the blending amount is preferably 1% by weight, and by blending 1% by weight or more, a more excellent removal effect can be obtained. The upper limit is preferably 8% by weight, and 8% by weight
If it exceeds, the increase of the removal effect will be small.

As an alkaline component, strong ammonia water,
Alkali metal hydroxides such as monoethanolamine, diethanolamine, triethanolamine, 2-amino-2-methyl-1-propanol, sodium carbonate, sodium hydroxide or potassium hydroxide, and sodium oleate, sodium stearate or At least one selected from the group consisting of fatty acid salts such as triethanolamine stearate is used, and among them, triethanolamine, monoethanolamine, and fatty acid salts are preferable from the viewpoint of removing effect. The blending amount is 0.01 to 1
It is 0% by weight, and if it is less than 0.01% by weight, the removing effect is not sufficient. Even if it is more than 10% by weight, no further effect can be expected. The lower limit of the blending amount is preferably 0.1% by weight, and by blending 0.1% by weight or more, a more excellent removal effect can be obtained. Regarding the upper limit, 5% by weight is preferable, and when it exceeds 5% by weight, the increase of the removing effect is small. That is, the dye removal agent of the present invention has an excellent removal effect by blending (A) either urea or thiourea, or both, and (B) either sulfite salt or alkali component, or both. And the effect of suppressing skin irritation is obtained.

The pH is in the range of 8 to 12, and preferably 9 to 11 from the viewpoint of removing effect.

The hair dye composition of the present invention may be in the form of liquid, emulsion, cream, gel, paste, aerosol or aerosol foam. Of these, emulsions, creams, gels or pastes are preferable because they are easy to use.

In addition, polyhydric alcohol as a moisturizing component,
Polyhydric alcohol alkyl ether or sugar, hyaluronic acid, chondroitin sulfate, mucopolysaccharide such as chitin,
Glycyrrhizic acid, glycyrrhetinic acid, guaiazulene, aloe extract or horse chestnut extract, as a thickener, carboxyvinyl polymer, carboxymethyl cellulose, hydroxyethyl cellulose, quaternary nitrogen-containing cellulose ether, xanthan gum, carrageenan, sodium alginate, pectin, pullulan, furceran, As oil, such as gum arabic, gatch gum, tragacanth gum, agar powder, liquid paraffin, squalane, petrolatum, beeswax, lanolin, ceresin,
Olive oil, silicone oil, and other nonionic surfactants, amphoteric surfactants, cationic surfactants, benzyloxyethanol, lower alcohols having 2 to 4 carbon atoms, higher alcohols, preservatives, fungicides, plant extracts, Fragrances and the like can be appropriately added.

The stain remover of the present invention can be applied to a skin dyed with a hair dye such as an oxidative hair dye, an acidic hair dye or a temporary hair dye, by simply wiping it with absorbent cotton or the like and gently wiping it.
It has a sufficient removing effect, does not cause irritation to the skin, and does not cause the treated skin to become bulky.

[0013]

EXAMPLES Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to the following examples unless it exceeds the gist.

<Comparative Experiment> Commercially available acidic hair dye (Hoyu Mild Color manufactured by Hoyu Co., Ltd.) was applied to the upper arm of a person, left for 30 minutes and washed with water, and then, Examples 1 to 4 and Comparative Example 1 in Table 1 were performed. The operation of impregnating absorbent cotton with the dyeing remover of ~ 6 and wiping with the same strength was repeated 10 times. Then, the removal effect of the hair dye and the skin irritation were evaluated according to the following criteria, and the results are shown in Table 1.

<Evaluation Criteria> (1) Removal Effect ◯ ... Almost removed. Δ: Some coloring remains. X: Almost no removal was possible, and coloring remained. (2) Skin irritation ◯: No redness or bulkiness and the same state as before treatment. Δ: Some redness and bulkiness are observed. X: Redness and bulkiness are observed.

[0016]

[Table 1]

Example 5 Cream base wt% Liquid paraffin 5 Vaseline 8 Cetostearyl alcohol 3.5 Polyoxyethylene (50) hydrogenated castor oil 5 Potassium sulfite 3 Thiourea 1 Allantoin 0.2 Purified water Appropriate amount Dyeing removal of the above composition When the agent was prepared and used on the skin dyed with a commercially available acidic hair dye (Hoyu Mild Color, manufactured by Hoyu Co., Ltd.), the removal effect was excellent and no skin irritation was observed as in Example 1. It was

Example 6 Emulsion base% by weight Stearic acid 4 Stearyl alcohol 2 Butyl stearate 3 Propylene glycol 2.5 Glycerin monostearate 1.5 Potassium hydroxide 0.2 Sodium sulfite 2 Urea 2 Dipotassium glycyrrhizinate 0.2 Purification Water Appropriate amount A dye removal agent having the above composition was prepared and used on skin dyed with a commercially available oxidative hair dye (Bigen Hair Color 6G manufactured by Hoyu Co., Ltd.). Excellent and no skin irritation was observed.

Example 7 Transparent gel base wt% Dipropylene glycol 7 PEG 1500 8 Carboxyvinyl polymer 0.3 Triethanolamine 0.3 Sodium sulfite 1 Urea 2 Purified water Appropriate amount A dye removal agent having the above composition was prepared and commercially available. When used on skin dyed with a temporary hair coating (Bigen Quick Touch manufactured by Hoyu Co., Ltd.), it had an excellent removing effect as in Example 1 and no skin irritation was observed.

[0020]

EFFECTS OF THE INVENTION The dye removing agent of the present invention has a high effect of removing stains when hair stains adhere to the skin.
Moreover, there is little skin irritation, and the skin does not become red or bulk after treatment.

Claims (1)

[Claims] 1. A dye removal agent, comprising (A) urea and / or thiourea, and (B) sulfite and / or an alkaline component.