JP2007230932A - Skin cleansing agent - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a skin cleansing agent that is visually understandable because the stains on the skin can readily be removed in the form of solid, remains moist feel after cleansing because a nonionic and lipophilic surfactant is included, can easily form eraser rubbings even in a little moist part, since it has high water resistance with little dripping. <P>SOLUTION: The agent is coated on the skin surface and the coated layer is rubbed so that these substances are changed to eraser rubbing-like solid and the stains and old keratin substance are removed together with the agent, at least comprises water, a polymer having a reaction group reacting with cation, a cationic surfactant, a nonionic lipophilic surfactant and a nonionic hydrophilic surfactant, wherein the content of the nonionic lipophilic surfactant is 0.1 5 to 5 wt.%. and that of the nonionic hydrophilic surfactant is 0.1 to 5 wt.%. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a skin cleanser.

  The skin cleanser is for removing dirt and old keratin on the skin. Here, it refers to a type that is applied to the skin and lightly rubbed to remove them together with the solidified one.

Conventional skin cleansing agents consist of a cationic surfactant and a polymer that reacts with it to solidify. For example, it is a skin cleaning material like patent document 1. FIG.
JP 2005-187338 A

  In this conventional example, by applying a small amount to the skin and gently massaging it, an eraser scrap can be produced, and at the same time, dirt and old keratin can be removed. You can see visually that it was cleaned.

However, in the above conventional example, all commercially available products are composed of water and an eraser scrap polymer and a cationic surfactant that reacts with the polymer. However, there is a feeling of crispness (inferior to emollient).
Therefore, such a cleaning agent that becomes an eraser scrap is good for removing dirt, but has no moist feeling, and therefore it is necessary to replenish oil after cleaning.

  In the conventional example, when the part to be applied is wet with water, it is difficult to produce eraser scraps even when massaged, and it is easy to cause liquid dripping and difficult to massage. That is, the water resistance is poor. Therefore, there were many opinions from users that the place of use was limited and it was difficult to use.

  In view of the above situation, the present inventor has completed the skin cleanser of the present invention as a result of diligent research, and the feature of the present inventor is that it is in the form of scraps of eraser when applied to the skin and rubbed. It removes dirt and old keratin along with its waste, and at least water, a polymer having a reactive group that reacts with a cation, a cationic surfactant, and a nonionic lipophilic surfactant. Agent, a nonionic hydrophilic surfactant, and the content thereof is 0.1 to 5% by weight for the nonionic lipophilic surfactant and 0.1 to 5% by weight for the nonionic hydrophilic surfactant. It is in.

  Here, the polymer having a reactive group that reacts with a cation is an anionic water-soluble polymer, and is generally a carboxyvinyl polymer. This is a polymerized acrylic acid monomer. There are various types of these materials, but any material may be used as long as it reacts with the cationic surfactant and rubs to become a scrap (gel) of an eraser.

  The content of this polymer is suitably 0.2 to 7% by weight of the entire skin cleanser of the present invention. If it is 0.2% or less, gel formation is insufficient, and if it is 7% or more, the viscosity of the gel increases and it is difficult to use.

Any cationic surfactant may be used as long as it reacts with the above-described polymer. Usually an ammonium salt. For example, monoalkyltrimethylammonium salt, dialkyltrimethylammonium salt, alkylpyridinium salt, dialkylmoriphonium salt and others.
The mixing amount is suitably 0.2 to 7% by weight as described above.

  In this combination, an eraser scrap is produced, but this alone does not give a moist feeling, so in order to compensate for this and to improve water resistance, in the present invention, a nonionic lipophilic surfactant and a nonionic system are used here. A hydrophilic surfactant is mixed. This is the point of the present invention.

The nonionic lipophilic surfactant has an HLB of 2 to 8, particularly 3 to 7. Examples include polyoxyethylene (5) polyoxypropylene glycol (HLB5.8), polyoxyethylene (3) castor oil (HLB3.0), polyoxyethylene (5) behenyl ether (HLB7.0), and the like. .
The content of this nonionic lipophilic surfactant is 0.1 to 5% by weight. If it is less than 0.1%, there is almost no effect, and if it is more than 5%, stickiness is felt and mixing is difficult.

The nonionic hydrophilic surfactant has an HLB of 12 to 18, and 13 to 17 is preferable. Examples include polyoxyethylene (12) secondary alkyl ether (HLB14.5), polyoxyethylene (9) secondary alkyl ether (HLB13.5), polyoxyethylene coconut oil fatty acid sorbitan (20EO) (HLB16.9). ) Etc.
The content of this nonionic hydrophilic surfactant is 0.1 to 5% by weight. If it is 0.1% or less, there is almost no effect, and if it is 5% or more, mixing is difficult.

  The point of the present invention is to add both a non-ionic surfactant and a new oil-based one, and the whole becomes a solution (including gel) instead of an emulsion.

  Furthermore, you may mix polyhydric alcohol like glycerol with said essential component. This is because the moisturizing effect and eraser scraps are more likely to come out. As the polyhydric alcohol, not only the glycerin but also ethylene glycol or polyethylene glycol can be used. The mixing amount is 1 to 20% by weight, and 5 to 15% by weight is more preferable.

  The above components are completed by adding water to 100% by weight, but other components may be added without departing from the spirit of the present invention. For example, plant extracts, vitamins, coloring agents, fragrances and the like.

The cleaning agent of the present invention is used by applying an appropriate amount of the cleaning agent to the skin (which may be wet) and rubbing the skin so that it is gently massaged. If it does in this way, a liquid will solidify and it will become scraps of eraser. It removes dirt and stale keratin from the skin.
After that, wash the waste with water or lukewarm water. This can be done easily. And it may or may not be maintained after normal cleaning.

The skin cleanser of the present invention has the following effects.
(1) Since it is solid and removes dirt and the like, it is visually easy to understand and is preferred by users.
(2) Since a nonionic lipophilic surfactant is mixed, it feels moist after washing.
(3) Since water resistance is high, eraser scraps are easily produced even in slightly wet parts, and there is little dripping.
(4) Gel type, not emulsion, and familiar skin.

  Hereinafter, based on an Example, this invention is demonstrated in detail.

Example 1
Examples and Comparative Examples were prepared by mixing the following components.
Examples were prepared by mixing a polymer having a reactive group that reacts with a cation, a cationic surfactant, a nonionic lipophilic surfactant, and a nonionic hydrophilic surfactant with water. The mixing amount is as shown in Table 1, and the component names in the table are as follows.
A: Carbopol 940 from Noveon, a carboxyvinyl polymer
B: Behenyl trimethyl ammonium salt C: Polyoxyethylene (5) Polyoxypropylene glycol (HLB 5.8)
D: Polyoxyethylene (3) castor oil (HLB 3.0)
E: Polyoxyethylene (5) behenyl ether (HLB 7.0)
F: Polyoxyethylene (12) secondary alkyl ether (HLB 14.5)
G: Polyoxyethylene (9) secondary alkyl ether (HLB 13.5)
H: Polyoxyethylene coconut oil fatty acid sorbitan (20EO) (HLB 16.9)
I: Glycerin J: Water

A few of these examples were applied to the skin and lightly massaged from above to solidify. And various effects were judged. The results are also shown in Table 1.
Here, in the state of generation of scraps, ◎ represents “very good”, ◯ represents “good”, and Δ represents “scraps but less effective”.
In terms of water resistance, it was confirmed whether or not eraser scraps could be visually confirmed by rubbing lightly with a sufficiently damp hand. That is, the comparison was made using the conventional example in a wet state, the conventional example in a wet state, and the product of the present invention in a wet state. ◎ is “a lot of waste like the visual confirmation in the non-wet state of the conventional example”, ○ is “same or slightly less than the visual confirmation in the non-wet state of the conventional example” , X represents “a level equivalent to or slightly less than that of the conventional visual confirmation in a wet state”.
In the emollient feeling, ◎ means “moist feeling”, ○ means “moist feeling”, and × means “no moist feeling”.
In stability, ◎ represents “very stable”, ◯ represents “stable”, and x represents “unstable (separation, etc.)”.

Next, the same comparative example is shown in Table 2.
Comparative Example 1 does not contain both nonionic surfactants, Comparative Example 2 does not contain nonionic hydrophilic surfactants, Comparative Example 3 does not contain nonionic lipophilic surfactants, Comparative Example 4 includes both nonionic surfactants but too much lipophilic surfactant, Comparative Example 5 includes both nonionic surfactants but too much hydrophilic surfactant, and Comparative Example 6 includes nonionic surfactants. Both surfactants are included, but both are too much.

  Examples 1 to 5 can be used sufficiently from Table 1, but it can be seen that it is better to add glycerin as in Example 6. It can also be seen from the other examples that various activators can be used.

It can be seen from Table 2 that both nonionic surfactants are necessary and that there is no effect if there is too much.

Claims (2)

When applied to the skin and rubbed, it changes to an eraser scrap and removes dirt and keratin with the scrap, and at least a reactive group that reacts with water and cations. Polymer, cationic surfactant, nonionic lipophilic surfactant, nonionic hydrophilic surfactant, the content of nonionic lipophilic surfactant is 0.1 to 5% by weight, nonionic hydrophilic A skin cleanser characterized by comprising 0.1 to 5% by weight of a surfactant. Furthermore, the skin cleanser of Claim 1 which mixes a polyhydric alcohol.