JP2530661B2 - Milky skin cleanser - Google Patents

Description

Description: TECHNICAL FIELD OF THE INVENTION The present invention relates to an emulsion-type skin cleansing agent, and more specifically, sufficient cleaning capable of easily cleaning excrement adhering to the skin when changing diapers. The present invention relates to an emulsion-type skin cleansing agent that has strength and an effect of preventing diaper rash.

Technical background of the invention and its problems People who cannot excrete themselves such as infants and the elderly often use diapers regularly, but the skin in contact with the diaper is affected by the excretion in the diaper. Often causes dermatitis (diaper rash).

By the way, the surface of human healthy skin is usually slightly acidic (pH 4.
2 to 5.6) to prevent skin protein denaturation and microbial growth, but the skin that comes into contact with diapers tends to lean toward the alkaline side because ammonia is constantly produced from urea in urine. On the other hand, the skin is always supplied with sebum and has the ability to neutralize some alkalinity due to the barrier effect of the skin membrane, but infants and the elderly have less secretion of sebum, The barrier effect of the sebum membrane is also weak. In addition, the presence of excrement raises the humidity, causing so-called stuffiness.

In this way, the alkalinization of skin and the increase in humidity lead to the growth of microorganisms and the reduction in strength of the skin, and the synergistic effect of diaper fibers and abrasions caused by rubbing of the skin under these adverse conditions is a major cause of diaper rash. It is said that.

Also, in general, stains on human skin are caused by sebum, cosmetics,
Most of them are oily or contain a large amount of oil, such as stool. Conventionally, as means for removing these stains,
There were various cleaning methods and cleaning agents.

However, as described in detail below, all of these cleaning methods and cleansing agents keep the skin surface weakly acidic so as to adapt to the skin (skin) of all as a means for preventing dermatitis. Since no consideration has been made for it, and as a result of focusing only on the hygiene effect, the effect of the drug having strong sterilization / detergency is too strong, or it is necessary to rub the skin strongly when removing dirt, On the contrary, it had a drawback that it hurt the skin and could not withstand repeated use over a long period of time.

(1) Method using detergent containing surfactant or soap Surfactant destroys the barrier effect because the degreasing effect of the skin is too strong, and soap has a considerably higher pH than the skin, so This is contrary to the viewpoint of maintaining the surface of the product weakly acidic, and the burden on the skin is large, which is not preferable.

(2) Method of using cleansing cream Since it is for removing oily makeup (cosmetics), it is difficult to remove stains on the skin other than this, and the friction against the skin is too large, which is not suitable. Also, a large amount must be used.

(3) Perianal cleaning agent Foam-type aerosol type (Japanese Patent Laid-Open No. 61-15
No. 1115) and an atomizer (fog) type oil. However, since the former contains almost no oil, it has no effect on oily stains, and therefore has the problem that it hurts the skin because it must be rubbed strongly at the moment of wiping. Almost 100
% Composition, it has no pH buffering ability, does not form bubbles with a strong cleaning effect at all, remains sticky after use, and it is hard to say that the skin feels comfortable.

Brevibacterium ammoniagene, which produces ammonia from urea in urine, although there are wiping agents that have these bactericidal effects
By sterilizing ammonia-producing bacteria such as s, it may be possible to contribute to the prevention of pH rise inside the diaper to some extent, but since ammonia is generated over time even without the presence of the bacterium, a bactericide is generally used. It is also considered that the skin irritation is too strong and the balance of the bacteria resident on the skin is disturbed, which adversely affects the skin.

OBJECT OF THE INVENTION The present invention solves the problems associated with the prior art as described above, and particularly when exchanging a diaper, acts gently on the skin and easily wipes off excrement adhering to the skin. In addition to having sufficient detergency, the surface of the skin can be kept weakly acidic even after the skin is wiped off, and the growth of bacteria etc. is prevented without adding special bactericides or anti-inflammatory agents. Then, it aims at providing the emulsion-type skin cleansing agent which can prevent a diaper rash.

SUMMARY OF THE INVENTION The emulsion-type skin cleansing agent according to the present invention contains a buffer solution of a weakly acidic organic acid (buffer) to keep the skin healthy, while adding a large amount of oil to form an emulsion, It is characterized by making it easy to remove not only oily dirt but also oily dirt.

The emulsion-type skin cleansing agent according to the present invention also plays a role of forming a barrier together with sebum because a large amount of oil remains on the skin surface even after cleaning, and protects the skin from the stimulation of excrement.

DETAILED DESCRIPTION OF THE INVENTION The milky liquid cleaning agent according to the present invention will be specifically described below.

The milky lotion according to the present invention contains animal oil, vegetable oil, mineral oil, and an oil component selected from among silicon oil in an amount of 20% by weight or more, and a buffer solution of organic acid (buffer) is added to adjust the pH. Is characterized by adjusting to 4.0-6.5.

The oils used in the present invention are mainly animal oils, vegetable oils (mainly triglycerides), but hydrocarbons, esters, mineral oils such as higher alcohols (having 10 or more carbon atoms), silicone oils and the like can also be used. These are not limited to one type, and two or more types can be mixed and used.

As animal and vegetable oils, olive oil, peanut oil, castor oil, almond oil, cocoa oil, palm oil, palm kernel oil, soybean oil, jojoba oil, coconut oil, avocado oil, soybean lecithin, which are relatively less irritating to the skin, Squalane is suitable.

Further, liquid paraffins other than animal and vegetable oils, petrolatum, lauryl alcohol, oleyl alcohol, 2-octyldodecanol, butyl stearate, hexyl tridecanoate, isopropyl myristate, isopropyl palmitate, higher alcohols such as 2-tricytetradecanol, Ester oils are also used.

These oils have the effect of facilitating the removal of oily stains on the skin during wiping, and remain on the surface of the skin after wiping, protecting the skin from the stimulation of excretion, and also the fibers and skin of the diaper. Has the effect of softening the friction with.

The organic acid buffer solution (buffer) added to the milky liquid cleaning agent of the present invention includes citric acid, lactic acid, malic acid, fumaric acid, adipic acid, tartaric acid, acetic acid, barbital acid,
A solution of a weak acid such as acetic acid and its salt (mainly sodium salt), the pH of which is adjusted to 4.0 to 6.0. The concentration of these buffer solutions is usually 1 mol or less with respect to the water content of the emulsion cleaning agent.

This buffer solution remains on the surface of the skin even after using a milky lotion, neutralizes ammonia generated from urine and the like, keeps the surface of the skin weakly acidic, and is one of the causes of diaper rash. It prevents the rise of pH.

The water used as necessary in the present invention is usually purified water (distilled water).

Further, in the present invention, it is preferable to use a surfactant in order to maintain the skin cleanser in an emulsion. Examples of the surfactant include monoglyceride, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, sugar ester, propylene glycol fatty acid ester, (above nonionic surfactant), alkyl sulfate,
Alkylbenzene sulfonate (above anionic surfactant), alkylamine acid, quaternary ammonium salt (above cationic surfactant), alkyl betaine lecithin (amphoteric surfactant) and the like can be used.

When the above oil content, weakly acidic buffer solution, a small amount of surfactant and the like are mixed and emulsified with a homogenizer, a milky liquid cleaning agent according to the present invention can be obtained.

Effects of the Invention The use of the milky cleaning agent of the present invention has the following effects as compared with conventional cleaning agents.

(1) Since the weak acid buffer solution remains on the skin surface even after wiping,
Ammonia generated from urine and the like is neutralized to keep the surface of the skin weakly acidic, and it is possible to prevent an increase in pH, which is one of the causes of diaper rash. As a result, the growth of bacteria can be considerably suppressed even without using a bactericidal agent, an anti-inflammatory agent or the like.

(2) As it contains a lot of oil, it has the effect of easily removing oily stains on the skin without rubbing it during wiping, and the oil remains on the surface of the skin even after wiping, stimulating excrement. Has the effect of protecting the skin from the heat and softening the friction between the fibers of the diaper and the skin.

(3) Conventional wiping agents have been effective only on one of water-based and oil-based, but since the wiping agent according to the present invention contains both water and oil, it is possible to remove both stains,
Also, it does not feel sticky after use. In addition, the skin is not supplemented with oil at the time of wiping, moisturizes the skin, and a skin care effect can be expected at the same time as wiping.

Example 1 The following substances were mixed and emulsified with a homogenizer to obtain a milky liquid cleaning agent according to the present invention.

Olive oil 5% by weight Isopropyl myristate 10% by weight Liquid paraffin 10% by weight Soy lecithin 1% by weight Stearic acid 1% by weight Polyoxyethylene glyceryl monostearate 0.5% by weight Glyceryl monostearate 0.5% by weight dl-α-tocopherol 0.1% by weight Citric acid 0.5% by weight Sodium citrate 1.5% by weight Butylparaben 0.1% by weight Methylparaben 0.1% by weight Purified water is added to this to make the total amount 100% by weight.

The effects of the milky liquid cleaning agent (E) according to the present invention and the commercially available cleaning agent (A), cleansing cream (B) cleansing oil, and (C) cleansing foam (D) were compared and the results are shown in Table 1. It was

From this Table 1, it can be seen that the milky liquid skin cleansing agent according to the present invention is remarkably excellent in every respect.

Claims (1)

(57) [Claims] 1. An oil selected from animal oils, vegetable oils, mineral oils, silicone oils, higher alcohols and ester oils is contained in an amount of 20% by weight or more, and a buffer solution of organic acid is contained to adjust the pH. A milky liquid skin cleanser characterized by being adjusted to 4.0 to 6.5.