JPS6040401B2 - Color-changing cosmetic composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to color-changing cosmetic compositions, and more specifically, for example, oral compositions such as toothpaste, denture cleaners, shampoos,
The present invention relates to cosmetic compositions such as hair creams and shaving creams that have discoloration properties.

Conventional cosmetics such as toothpastes and denture cleaners have strong cleaning, cleansing, and polishing effects, but each person uses them in different ways and stains with a wide variety of contaminants. Also, since the degree of dirt varies widely, it is not always possible to obtain a sufficient cleaning effect, and on the other hand, shampoos, shaving creams, etc. may not have sufficient cleaning effect if washed too quickly. There are many.

To explain in more detail, when brushing teeth conventionally, there is no guideline as to how much brushing is sufficient, so the actual situation is that the polishing time is extremely short, and the polishing time is about 3 times a day. It was hard to say. In addition, although denture cleaning pastes usually have the same form as toothpaste, the abrasives they contain are powders that are as hard as or harder than toothpaste, so they can cause fine scratches on dentures and denture bases. There was a problem in that these glosses were erased. Furthermore, because of the small scratches, it was difficult to remove the dirt that had adhered to them, and the stains were also severe. These phenomena were often caused by excessive polishing. For example, many hair removal creams are spray-type or squeeze-type, and although they are convenient for the user, they are instructed to wipe them off after application, and in many cases, the user is instructed to wipe them off after application. This may result in the patient being taken away, making it difficult to obtain sufficient effects.
Therefore, in order to obtain the full effect when using these products, it is best to wait a while after application before wiping. However, in reality, it is difficult for the user to do this because there is no guideline for the time from when the spray is applied to when it is wiped off. The purpose of the present invention is to easily indicate the elapsed time after applying a cosmetic product by a change in color tone, and to fully demonstrate the cleaning effect. , which uses redox dyes.

In general, the reduced form of this type of pigment is colorless to light colored, and the oxidized form is often dark colored, but even if the reverse is true, that is, the oxidized form is lighter colored than the reduced Naturally, dyes whose color tone changes depending on the environment or reducing atmosphere can be used. As described above, the present invention blends a dye whose color tone changes with oxidation and reduction into a cosmetic composition, gives the cosmetic composition the property of changing color with the passage of time, and after applying the dye to teeth, dentures, etc. The aim is to display the image by changing the color tone.

When the dye used in the present invention is used in cosmetics that are used in an oxidizing atmosphere, the dye used is blended as a reducing agent, and after use, the color tone changes due to oxidation over time, indicating when it is time to remove it. This is what we are trying to do.

Since cosmetics are normally used in the air, in other words in an oxidizing atmosphere, reduced dyes are blended into cosmetic compositions, and this is applied to the surface of contaminants.
By waiting for the dye to change into an oxidized form and develop a color, and then removing it, the purpose of cleaning etc. can be sufficiently achieved.
As is clear from the experiments described below, redox dyes generally include di- and triphenylmethane dyes, xanthene dyes, acridine dyes, azine dyes, oxazine dyes, anthraquinone dyes, indigoid dyes, and phthalocyanine dyes. Dyes, quinoline dyes, and other dyes that become reduced pigments with a reducing agent and have the property of restoring the original color by oxidation can be used.As the reducing agent, for example, hydrosulfite (Na2S204), sodium thiosulfate, etc. , sodium sulfite, rubber, and the like are effectively used, and reducing sugars can also be used because they exhibit a reducing effect on dyes sensitive to redox such as indigo carmine.

Incidentally, ascorbic acid, propyl gallate, quercetin, etc., which are used as antioxidants for fats and oils, have antioxidant effects themselves, and are appropriately added to adjust the discoloration time. Although various additives can be used in various cosmetics, it goes without saying that colorants approved as food additives such as indigo carmine, fast green FCF, and alizarin should be used as colorants.

The color change of the present invention can be adjusted by adjusting the reducing agent, oxidizing agent, antioxidant, pH, etc. used, so the time of use, after application, and after spraying until the start of work can be clearly determined by the change in color. This means that it can be shown.

Furthermore, since atmospheric oxygen is used as an oxidizing agent, it is advantageous to use a closed container for storage, and an aerosol type is preferable.

As explained above, the color-changing cosmetic composition of the present invention is
Dyes that change color over time due to oxidation-reduction reactions in oral compositions such as toothpaste, denture cleaners, shampoos, hair removal creams, shaving creams, and other cosmetics, and reductions that reduce these dyes to a reduced state. It is a combination of agents. Therefore, according to the present invention, by incorporating a pigment that changes color due to oxidation-reduction, the color changes at a time when the oral cavity cleaning effect is considered to be sufficient, thereby making it possible to indicate to the user the tooth brushing time. Further, according to the present invention, since the color changes when brushing the denture, it becomes a guide for the brushing time, thereby preventing over-polishing of the denture and the denture base, and thus preventing wear of the denture and prolonging its life. is possible. In addition, shampoos have a sufficient hair washing effect, and hair removal creams have a sufficient hair removal effect.
In addition, in the case of a shaving cream, a sufficient shaving effect can be achieved. In particular, as is clear from the results of Experimental Example 2 described below, the time until discoloration can be accurately and arbitrarily controlled by adjusting the amount of reducing agent added.
To easily and appropriately set discoloration time according to each use of cosmetics.

Next, using Experimental Examples 1 and 2, changes in various dyes and the relationship between the amount of reducing agent and the color change time of the dye will be explained.

Experimental example 1 Table 1 shows the discoloration of various dyes due to Na2S204.
, Roko showed.

Table 1 Table □ Experimental example 2 Table 1, color index basic blue No. in 0
．． 50' of the 0.1% dye solution of No. 3 was reduced with Na2S204 under various conditions, and the time until there was a clear color change after application was measured.

The results are shown in the drawing. As shown in Experimental Example 1, this dye becomes a colorless and transparent aqueous solution in a reduced state, and the color is restored to blue by the oxidizing action of oxygen in the air. ' In the figure, curve 1 shows the discoloration time when hydrosulfite is added to a dye aqueous solution at pH 6.5, and curve 2 shows the discoloration time when 0.03 m of sodium sulfite is added in advance.
There is a case where Na2S204 is added to it, and curve 3 is p
It shows the amount of Na 204 added to the dye solution of H9.0 and the time of color change.

(The composition of the dye aqueous solution in curve 3 is shown in the table below.) Good results were also obtained for the other dyes shown in Table 1, n. Table m Solution composition used in Experimental Example 2 Next, examples will be shown to explain the composition of the color-changing cosmetic composition of the present invention.

Example 1 (Hair removal cream) Pigment (Basic Blue No. 3) 0.05 parts by weight%
Calcium thioglycoate trihydrate
6.0 Calcium carbonate
21.0 Calcium hydroxide
1.5 Cetyl alcohol
4.5 Sodium lauryl sulfate 0.5
″Sodium silicate 1.0 〃Fragrance
0.5 Hydrosulfite 0.25 Pure water
Remaining amount Example 2 (Shaving foam (undiluted solution)) Pigment (Ashitsu Blue No. 43) 0.05% by weight Stearic acid 5.0 Lauric acid 2.0 Setanol
0.5 Liquid paraffin
0.5″70% Sorbitol
3.0 Sodium lauryl sulfate 6.0 Triethanolamine
2.5 Potassium hydroxide 1.0
〃Fragrance Applicable hydrosulfite 0.25 〃Pure water
Remaining amount example 3 (Paste for denture cleaning) Pigment (indigo carmine) 0.0% by weight Sodium carboxymethyl cellulose 1.0 Q-quartz 5.0 ″99.5
% Glycerin 20.0 Dibasic calcium phosphate dihydrate 40.0 Flavoring
1U Hydrosulfite
0.1 Pure water
Remaining amount

[Brief explanation of the drawing]

The drawing is Basic Blue No. 3 shows the relationship between the amount of hydrosulfite (axis) and the discoloration time (vertical axis).

Claims (1)

[Claims] 1. A discoloration characterized in that it contains a dye that changes color due to an oxidation-reduction reaction over time and a reducing agent that brings the dye into a reduced state, and the elapsed application time is indicated by a change in color tone. sexual cosmetic composition.