JP2006111606A - Photocatalyst-containing composition for hair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a photocatalyst-containing composition for hair which contains an effective new material as a substitute for all or a part of an oxidizing agent contained in a cosmetic for hair and a quasi-drug for hair, and hence overcomes conventional defects and is stable for a long time. <P>SOLUTION: This composition provided contains at least one compound having a photocatalytic action as the substitute for all or a part of the conventionally used oxidizing agent. A method for using the composition is also provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to hair supplies. More specifically, the present invention relates to a hair product containing at least one semiconductor having a photocatalytic action instead of all or part of the oxidizer conventionally blended in hair cosmetics and quasi drugs for hair.

As shown in FIG. 2, the oxidizing agent blended in conventional cosmetics for hair and quasi-pharmaceutical products is decomposed by the oxidizing agent itself and has a strong oxidizing action (O ₂ ⁻ , OH). ⁻ , H ₂ O ₂ ,).

However, according to the above technique, decomposition and discoloration occur even in the storage state, so that the pH range that can be used for long-term storage is limited and the activity is also suppressed. In addition, there is a limit to the substances that can be blended because other blended active ingredients are gradually oxidized during the storage period. Further, since the oxidizing agent itself has an oxidizing action, a large amount of the compound is necessary.

  Therefore, the present invention is a stable oxidizing agent that does not have an oxidizing action during the storage period and has no coloring or discoloration, and has an oxidizing action at the time of use, and also contains an oxidizing agent that has an oxidizing action continuously even in a small amount. It is an object to provide a cosmetic product for hair and a quasi-drug for hair.

  In order to solve the above-mentioned problems, the first invention is a cosmetic for hair characterized by blending at least one semiconductor having a photocatalytic action in place of all or part of the oxidizer conventionally blended, And quasi-drugs for hair. In the present invention, the blending amount of the semiconductor is preferably 0.001 to 20% by mass, particularly 0.1 to 10% by mass in the hair product. If it is less than 0.001% by mass, the effect of the present invention is not sufficiently exhibited. On the other hand, even if it exceeds 20% by mass, no significant improvement in the effect is observed, and it becomes difficult to formulate.

  The second invention is a method of use characterized in that at least one semiconductor having a photocatalytic action is blended, and at least one of a fluorescent lamp, a black light, and an ultrahigh pressure mercury lamp is used when the product is used. is there.

According to the first invention or the second invention, since a semiconductor having a photocatalytic action is used as an oxidizing agent, the semiconductor itself is not decomposed. In particular, titanium oxide does not elute in water, and as shown in FIG. 1, it generates active oxygen species such as O ₂ ⁻ , OH ⁻ , and H ₂ O ₂ on the catalyst upon irradiation with light and continuously oxidizes it. The oxidation reaction can be continued even with a small amount. These occur when holes and electrons generated in the valence band and conduction band of an optical semiconductor are combined with hydroxyl, water, adsorbed oxygen, and the like. In addition, during the storage period, the product is shielded from light so that it does not have an oxidizing action and the product is not deteriorated due to oxidation and can be stored for a long period of time.

  EXAMPLES Next, although an Example demonstrates this invention further in detail, the technical scope of this invention is not limited at all by these Examples. In addition, unless otherwise indicated, the blending amount is indicated by mass%.

(Comparative Examples 1-3, Examples 1-12)
Stability over time was observed using sodium bromate, potassium bromate, and hydrogen peroxide as oxidants conventionally used. Specifically, each component described in Table 1 was mixed and heated to prepare test compositions (Comparative Examples 1 to 3, Examples 1 to 12), and the temporal stability was evaluated by the following evaluation method. Together with these results, Comparative Examples 1 to 3 are shown in Table 1, and Examples 1 to 12 are shown in Table 2.

(Evaluation method by overview)
Evaluation based on changes in color tone and the like after adjustment of the test composition and after standing at a constant temperature layer of 45 ° C.
A: No change in color tone or the like is observed.
○: Some discoloration and coloring are observed.
●: Discoloration and coloring are clearly confirmed.
X: Generation of gas is confirmed.

  In addition to the results shown in Table 1, it was found that sodium bromate and potassium bromate can be stored for a long period of time without change in appearance when the pH during adjustment is adjusted to around 7.0 or higher.

  From these results, it was confirmed that a semiconductor having a photocatalytic action is a stable oxidizing agent without decomposition or discoloration. The same evaluation method was performed also in the Example shown below.

<Example 13> Hair tonic raw material weight%
A
Polyoxyethylene hydrogenated castor oil 1.0
Pepper tincture 0.1
Tocopherol acetate 0.05
95% native ethanol 50.0
B
P-Hydroxybenzoate ester 0.3
95% unmodified alcohol 5.0
Titanium oxide 0.1
Purified water Heat-dissolve ingredients belonging to appropriate amount A. Separately, the component belonging to B is dispersed. B was added to A, stirred, mixed and then cooled to produce a hair tonic.

<Example 14> Hair shampoo raw material name% by weight
A
Edetate disodium 0.1
P-Hydroxybenzoate ester 0.3
1,3-butylene glycol 10.0
Citric acid 0.5
Purified water appropriate amount B
Palm oil fatty acid sodium methyltaurine 20.0
Sodium polyoxyethylene lauryl ether sulfate 20.0
Amidopropyl betaine laurate 10.0
Ethylene glycol distearate 2.0
Polyoxyethylene lauryl ether 1.0
Titanium oxide 1.0
The components belonging to A are dissolved by heating. Separately, the component belonging to B is dissolved by heating. B was added to A, stirred and emulsified, and then cooled to produce a hair shampoo.

<Example 15> Hair rinse raw material weight%
A
Cetyl alcohol 5.0
Isopropyl palmitate 5.0
Dimethicone 2.0
Jojoba oil 2.0
Stearyltrimethylammonium chloride 2.0
Polyoxyethylene oleyl ether 1.0
Titanium oxide 0.3
B
Glycerin 10.0
Cationized cellulose 0.6
P-Hydroxybenzoate ester 0.6
Purified water Heat-dissolve ingredients belonging to appropriate amount A Separately, the component belonging to B is dissolved by heating. B was added to A, stirred and emulsified, and then cooled to produce a hair rinse.

<Example 16> Name of second agent raw material for permanent wave Weight%
Hydrogen peroxide 1.5
Titanium oxide 0.3
Glycerin 10.0
Polyoxyethylene lauryl ether 1.0
P-Hydroxybenzoate ester 0.6
Purified water An appropriate amount of the above ingredients were mixed and stirred to produce a second agent for permanent wave.

<Example 17> Hair bleaching agent Second agent raw material name Weight%
A
Cetanol 5.0
Polyoxyethylene stearyl ether 2.0
Stearyltrimethylammonium chloride 0.6
B
Sodium stannate 0.05
Phosphoric acid 0.3
Purified water appropriate amount C
Hydrogen peroxide 5.0
Titanium oxide 1.0
The components belonging to A are dissolved by heating. Separately, the component belonging to B is dissolved by heating. B was added to A, stirred and emulsified, cooled, the components belonging to C were added and stirred, and a hair bleaching agent second agent was produced.

<Example 18> Hair dye Second agent raw material name Weight%
A
Cetanol 3.0
Polyoxyethylene stearyl ether 2.0
Liquid paraffin 10.0
B
Edetate disodium 0.1
Citric acid 0.2
Purified water appropriate amount C
Hydrogen peroxide 5.0
Titanium oxide 1.0
The components belonging to A are dissolved by heating. Separately, the component belonging to B is dissolved by heating. B was added to A, and after stirring and emulsification, the mixture was cooled, the components belonging to C were added and stirred, and a hair dye second agent was produced.

<Example 19> Name of raw material for hair wax Weight%
Candelilla Row 5.0
Microcrystalline wax 1.0
Titanium oxide 2.0
Isopropyl myristate 20.0
Vinyl acetate / crotonic acid copolymer 0.05
Stearic acid 5.0
Sodium hydroxide 0.3
Phenoxyethanol 0.6
Citric acid 0.5
Purified water An appropriate amount of the above ingredients were mixed, heated and stirred to produce a hair wax.

<Example 20> Name of hair cream raw material Weight%
A
Polyoxyethylene sorbitan monostearate 2.0
Polyoxyethylene cetyl ether 1.0
Glyceryl monostearate 0.5
Stearic acid 2.0
Behenyl alcohol 1.0
Liquid paraffin 20.0
P-Hydroxybenzoate ester 0.6
Titanium oxide 0.5
B
1.3-Butylene glycol 2.0
Purified water Heat-dissolve ingredients belonging to appropriate amount A. Separately, the component belonging to B is dissolved by heating. B was added to A, stirred and emulsified, and then cooled to produce a hair cream.

  Also in the hair products of Examples 13 to 20, it was confirmed that the semiconductor having a photocatalytic action was a stable oxidizing agent without decomposition or discoloration.

This is a process of generating active oxygen species by the photocatalyst which is the oxidizing agent of the present invention. This is a process of generating reactive oxygen species by a conventional oxidant.

Explanation of symbols

1 Water 2 Oxidizing agent (TiO ₂ etc.)
3 Light source (sunlight, black light, fluorescent lamp, ultra-high pressure mercury lamp, mercury lamp, etc.)
4 Light is irradiated to the photocatalyst to generate electrons and holes.
5 Electrons activate dissolved oxygen to make it active oxygen.
6 Water is decomposed into hydroxy ions and hydrogen ions by holes on the catalyst surface.
7 Hydrogen ions and active oxygen are chemically bonded.
8 Furthermore, hydrogen peroxide is produced.
9 Production of active oxygen by potassium bromate.
10 Production of active oxygen by sodium bromate.

Claims (5)

A composition comprising a semiconductor having a photocatalytic action in hair cosmetics and quasi-pharmaceutical products for hair. A semiconductor with a photocatalytic action has a band gap energy between a valence band of 1.5 to 5.0 eV and a conductor, and the valence band is also present on the positive side of 1.2 V with respect to the hydrogen electrode potential. The composition according to claim 1. Semiconductors with photocatalytic action are titanium oxide (TiO ₂ ), zinc oxide (ZnO), iron oxide (Fe ₂ O ₃ ), niobium oxide (Nb ₂ O ₅ ), tungsten oxide (WO ₃ ), tin oxide (SnO ₂ ). , Strontium titanate (SrTiO ₃ ), cadmium selenide (CdSe), potassium tantalate (KTaO ₃ ), cadmium sulfide (CdS), zirconium oxide (ZrO ₂ ), gallium phosphide (GaP) 3. A composition according to claim 1 or 2, characterized in that it is or is a compound comprising it. Further hydrogen peroxide _{(H 2 O} 2), sodium bromate (NaBrO _3), potassium bromate (KBrO _3), according to any one of claims 1 to 3 containing at least one one of platinum (Pt) Composition. A method of use, wherein at least one of a fluorescent lamp, a black light, a mercury lamp, and an ultra-high pressure mercury lamp is used when the composition according to any one of claims 1 to 4 is used.

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