JP2003261438A - Wet tissue and lotion - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pre-moistened wipe and a skin lotion having high moisture-retention and low skin stimulation and useful for the wiping of the skin. <P>SOLUTION: The pre-moistened wipe is produced by impregnating a fiber material with an aqueous solution of the monomer and/or polymer of 2- methacryloyloxyethyl phosphorylcholine and packaging the impregnated material with a packaging material. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet tissue for cleansing the skin and a lotion having high moisture retention and less skin irritation.

[0002]

2. Description of the Related Art A wet tissue in which a tissue is impregnated with an aqueous solution (lotion) has been proposed for the purpose of cleaning human skin and daily necessities, and various products are commercially available. This wet tissue is a product form in which many tissues impregnated with lotion are stored in the packaging material (packing container), which can be easily taken out during use, and the components of clean water do not change during storage. is important. That is, the packaging material (packing container) used for this wet tissue is provided with an openable / closable outlet, which can be easily opened during use and the lotion or one component thereof does not volatilize when closed. Such a configuration is adopted. In addition, as a lotion, the skin lotion remains without volatilizing as it is after wiping the skin etc., and it is necessary to wipe it off with a dry cloth such as a handkerchief or a dry tissue. Lower alcohols such as isopropyl alcohol are blended to volatilize quickly after use. Further, by blending these lower alcohols, the cleaning effect of removing stains is more remarkable than that of water alone, and the antibacterial effect is also obtained.

[0003]

However, the fact that the lower alcohol is mixed with water as described above makes the volatility higher, which means that it is more likely to volatilize from the outlet even during storage. If you do not use it up in a short time, the lotion will be evaporated and become dry tissue,
In some cases, the desired cleaning effect could not be obtained. Also, if you volatilize rapidly after wiping your skin, etc., you may feel an unpleasant sensation of coldness.
In addition, the oily components on the skin surface may be wiped off to cause rough skin. Furthermore, for the purpose of improving the antibacterial effect, etc., products containing various chemical substances in lotion have been proposed, but they are more irritating to the skin than alcohols and may cause itching and rashes. It was In particular, allergic dermatitis and the like are known as one symptom of sick house disease (chemical substance hypersensitivity), which has been a problem in recent years, but it cannot be applied to patients with such a symptom at all. Therefore, the present inventors can provide a moist and refreshing feeling after use by using a lotion having high moisturizing property and high affinity with the skin, and even for users who have sensitive skin. It is an object of the present invention to propose a wet tissue that is less irritating and can provide a rough skin preventing effect.

[0004]

DISCLOSURE OF THE INVENTION As a result of intensive studies in view of the above circumstances, the present invention has revealed that a fiber material has 2-methacryloyloxyethylphosphorylcholine (hereinafter referred to as MPC) having the following structural formula.

[Chemical 3] The present invention relates to a wet tissue and a lotion which are impregnated with an aqueous solution of the monomer and / or polymer and are contained in a packaging material. At this time, the concentration of the MPC monomer and / or polymer in the aqueous solution is preferably 0.05 to 10% by weight. Further, as the medium of the aqueous solution, water, methyl alcohol, ethyl alcohol, isopropyl alcohol, etc., or a mixture thereof can be used.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The monomer and / or polymer of MPC used in the lotion of the wet tissue of the present invention is
It is a known chemical substance and has been used to date in cosmetics, various medical materials, contact lenses and the like. This MPC is a zwitterionic compound having an anion group and a cation group in the molecule as is clear from the above structural formula. Therefore, it is very hydrophilic and has sufficient water retention properties, and when added to an aqueous solution, it has a property of significantly reducing the surface tension of the aqueous solution. Further, this MPC is a compound having a plurality of elements having unpaired electron pairs of P and N in the molecule, and whether the fibrous material is a natural fiber or a synthetic fiber is easily fixed, and its surface is temporarily fixed. It has a characteristic that it is very difficult to be detached when it is fixed on. This property means that the MPC molecule or polymer is easily fixed to the surface of the fibrous material by a very simple operation of bringing the surface of the fibrous material into contact with an aqueous solution of MPC. In addition, MPC has the same structure as the polar group of phospholipid (phosphatidylcholine), which is the main component of the biological membrane, and has excellent affinity with the living body. Phosphatidylcholine is a constituent component of cells in vivo, is widely distributed in the animal and plant kingdoms, and is known to bind to about 10 water molecules per phosphatidylcholine molecule in the lamella layer when forming liposomes in water. ing.
In addition, phospholipids typified by lecithin are components similar to cell membranes and have a high affinity with the skin, and thus are blended in the field of cosmetics for the purpose of alleviating rough skin and softening the skin. .

According to the present invention, various fiber materials are impregnated with an aqueous solution of MPC monomer and / or polymer, and the surface of the fiber material is hydrophilized, and abrupt volatilization of lotion is prevented. The feature is that it gives a feeling of use, and as the fiber material, the fiber material used in the conventional wet tissue can be applied as it is. Further, as the packaging material (packing container), the packaging material (packaging material) used for the conventional wet tissue can be applied as it is.

[0007] As described above, the MPC monomer and / or polymer is fixed on the surface of the fiber material, and moreover, it prevents the evaporation of water due to the water retention effect. Even if it is rubbed on the skin, it is less irritating to the skin and can provide a rough skin preventing effect.

In the present invention, the concentration of the MPC monomer and / or polymer in the aqueous solution, which is the lotion to be impregnated into the fiber material, is preferably about 0.05 to 10% by weight, as described above. It is preferably 0.1 to 5% by weight. The concentration of MPC monomer and / or polymer in the aqueous solution is 0.
If the concentration is lower than 05% by weight, the water retaining effect cannot be obtained, and if the concentration is higher than 10% by weight, so-called sticky feeling remains on the skin after use.

[0009]

EXAMPLES Examples of the present invention will be shown below, but the present invention is not limited to these examples.

[Example 1] 1. Composition of aqueous solution (this aqueous solution can be used as a lotion as it is) Formulation example 1 containing MPC monomer or polymer having the following composition
An aqueous solution of 4 was prepared. [Formulation Example 1; 0.5% aqueous solution of MPC monomer] MPC monomer: 0.1 wt% Water: 99.5 wt% [Formulation example 2; 1% solution of MPC polymer] MPC polymer (degree of polymerization) n = 20): 1.0 wt% water: 49.5 wt% methyl alcohol: 49.5 wt% [Formulation example 3; 0.1% solution of MPC polymer] MPC polymer (degree of polymerization n = 20): 5. 0 wt% Water: 70.0 wt% Ethyl alcohol: 25.0 wt% [Formulation Example 4; 2% solution of MPC monomer] MPC monomer: 8.0 wt% Water: 32.0 wt% Methyl alcohol: 30.0 wt % Ethyl alcohol: 30.0wt%

Aqueous solutions of Comparative Formulation Examples 1 to 3 containing no MPC monomer or polymer having the following composition were prepared. [Comparative formulation example 1; nonionic surfactant aqueous solution] Sorbitan isostearate POE (20): 2.0 wt% water: 98.0 wt% [Comparative formulation example 2: nonionic surfactant aqueous solution] Glyceryl monostearate: 2.0 wt% Water: 98.0 wt% [Comparative Formulation Example 3: Cationic surfactant aqueous solution] Benzalkonium chloride: 2.0 wt% Water: 98.0 wt%

2. Preparation of wet tissue A commercially available dry tissue was placed in a water-impermeable and sealable bottomed container having a discharge hole, and tap water, a total of 7 of the above-mentioned formulation examples 1 to 4 and comparative formulation examples 1 and 2 were placed in this container. Various kinds of treatment liquids were added, the dry tissue was immersed, and the treatment liquid was immediately discharged from the discharge hole at the bottom to obtain a wet tissue.

3. We asked seven panelists to compare the 7 types of wet tissues created in Tactile test 2 for several days, and regarding the tactile sensations in use, the best point was 10 points and the lowest point was 1 point. The value of was evaluated by the subjectivity of each person. The results obtained by 10 panelists are shown in Table 1 as average values.

[Table 1]

An example of the embodiment of the present invention has been described above.
The present invention is not limited to the above-described embodiments, but can be implemented in any manner as long as the configuration described in the claims is not changed.

[0015]

Industrial Applicability As described above, the wet tissue and lotion of the present invention have good touch, excellent moisturizing properties, less stickiness, less skin irritation, weak skin or rough skin. It also has excellent performance that works softly.

Claims (4)

[Claims] 1. A fibrous material comprising 2-methacryloyloxyethylphosphorylcholine: A wet tissue impregnated with an aqueous solution of the monomer and / or polymer of (1) and contained in a packaging material. 2. The aqueous solution is water and / or having 1 to 3 carbon atoms.
The wet tissue according to claim 1, which is a simple substance or a mixture of the aliphatic lower alcohols. 3. A lotion for impregnating a fibrous material contained in a packaging material, which comprises 2-methacryloyloxyethylphosphorylcholine. A lotion which is an aqueous solution of the above monomer and / or polymer. 4. The aqueous solution is water and / or having 1 to 3 carbon atoms.
4. The lotion according to claim 3, which is a simple substance or a mixture of the aliphatic lower alcohols.