JPH0525024A - Shampoo - Google Patents

Abstract

PURPOSE:To provide a shampoo capable of making the hair wet and soft without application of a rinse or a treatment and capable of a wet finish. CONSTITUTION:A shampoo containing 6-8wt.% egg yolk oil as the essential component, showing pH 6-7 and preferably further containing 2.5-3.5wt.% fibroin is obtained. As water and oil components can be given to the hair in enough amounts to be free from scratching this shampoo can give an excellent finishing without application of a rinse or a treatment. As lecithin contained in egg yolk oil shows properties of a surfactant, e.g. a penetrating force to the hair and the scalp, the above-mentioned finishing effect can be kept without stickiness or reduction of detergency even in case of an increased content unlike in other conditioning agents. In the case of further addition of fibroin having a high affinity to the hair, long-term continuous application thereof to wound hairs can return the hairs to the normal hair state since a finishing effect similar to a glossy silk can be kept by improvement of coating effect due to synergistic effects between lecithin and fibroin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shampoo having excellent finishing properties even without rinsing and treatment.

[0002]

2. Description of the Related Art In recent years, shampoos are required to have not only a mere washing action, but also a conditioning effect for imparting moistness and softness to hair. There is also an increasing demand for shampoos that do not require the use of rinses and treatments.

In order to satisfy such requirements, generally marketed shampoos are prepared as neutral to weakly acidic by using anionic surfactants and nonionic surfactants as surfactants, and are used as conditioning agents. , An oil component such as cetyl alcohol or silicone, a so-called humectant having excellent hydrophilicity such as glycerin or propylene glycol, and the like are contained in an amount of about 0.1 to 2% by weight.

[0004]

However, if only 0.1 to 2% by weight of a higher alcohol such as cetyl alcohol or a moisturizing agent such as propylene glycol is contained, the rinsing and treatment are not required. Is not expected, on the other hand, if it is contained more than this, foaming becomes worse and the product becomes sticky. Therefore, the conventional shampoo has an insufficient conditioning effect, and the hair cannot be sufficiently protected unless the shampoo is rinsed and treated.

The above conditioning agents are also used as an oily raw material for rinsing and treatment, but the effect is satisfactory from the viewpoint of hair protection simply by coating the epidermis of the hair. is not. For example, silicone is often used as an oily raw material for rinses and treatments because it has an excellent ability to reduce friction and facilitates combing. However, the film easily peels off, and it is effective over time. When the content is increased, the dust in the atmosphere is likely to adhere to it when the content is increased.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide sufficient moisture and oil to hair and to provide excellent finish without rinsing and treatment. To provide shampoo.

[0007]

The shampoo of the present invention comprises:
It contains 6 to 8% by weight of egg yolk oil and has a pH of 6 to 7. A shampoo of another invention contains 6 to 8% by weight of egg yolk oil, further contains 2.5 to 3.5% by weight of fibroin, and has a pH of 6 to 7.

[0008]

EXAMPLES As the shampoo of the present invention, those generally known as a surfactant for shampoo are used, but in order to have good foaming and to make the shampoo neutral to acidic,
A combination of anionic and nonionic surfactants is preferred. Examples of the anionic surfactant include sodium alkylsulfate, triethanolamine alkylsulfate, sodium polyoxyethylene alkylsulfate, and the like. Examples of nonionic surfactants that can be used include fatty acid diethanolamide and polyoxyethylene fatty acid monoethanolamide. The content of such a surfactant is about 10 to 35% by weight, which is similar to a surfactant generally used as a liquid shampoo.

The egg yolk oil used as a conditioning agent in the present invention is the remaining component obtained by removing protein and water from egg yolk. The egg yolk oil contains lecithin, which is a phospholipid, in an amount of about 25 to 30% by weight, and also contains linoleic acid, vitamins A, B, D and E. Lecithin is
It imparts moisture and oil to hair and is permeable to the hair and scalp. Therefore, unlike the case of using an oil component such as higher alcohol, it does not feel sticky even when contained in a large amount. Furthermore, it has the effect of alleviating the irritation to the scalp of other compounding agents such as surfactants and fragrances, and also has the effect of preventing dandruff. Note that lecithin includes plant lecithin in addition to egg yolk lecithin, but the effect of the present invention is remarkable in egg yolk lecithin.

The content of egg yolk oil containing lecithin having such excellent properties is 6 to 8% by weight in the shampoo. If it is less than 6% by weight, the content of lecithin is 1.
Since it is less than 5% by weight, the effect of lecithin is small, and no significant difference from the conventional shampoo containing the conditioning agent is recognized. On the other hand, if it exceeds 8% by weight, stable blending into shampoo becomes difficult and the detergency deteriorates. Since lecithin has a property as a surfactant capable of existing as a zwitterion in any pH range, the content of egg yolk oil can be changed to the content of other conditioning agents (0.1 to 0.1) by the emulsifying action of lecithin. 2% by weight). By containing a large amount of egg yolk oil with excellent conditioning effect, rinse,
Even without treatment, there is no squeaky feeling and a satisfactory finish can be obtained.

It is preferable that the conditioning agent further contains fibroin in an amount of about 2.5 to 3.5% by weight. Since fibroin has a keratin structure similar to that of hair, it has a better affinity with hair than silicone or the like. Therefore, a film is formed as if it were integrated with the epidermis of hair, and the gloss retention is excellent. Moreover, since it is not oily like silicone, dust does not adhere even if it is used in a relatively large amount. Further, when fibroin is contained alone, only a coating effect can be obtained, but when it is used in combination with egg yolk oil, a synergistic effect with the penetrating action of lecithin can be achieved and the coating effect can be sustained. Therefore, if the porous damaged hair is continuously used for a long period of time, an effect of healing the damaged hair to normal hair can be expected.

[0012] The fibroin used in the present invention is not particularly limited in its form, but usually silk fibroin hydrolyzed into a polypeptide having a molecular weight of about 1000 is used.

In the shampoo of the present invention, in addition to the above-mentioned compounding agents, preservatives, perfumes and the like may be appropriately compounded. Antiseptics, fragrances and the like generally have a drawback that they are irritating to the scalp and cannot be used for allergic people, but in the present invention, since egg yolk oil alleviates these irritation, It can also be used for people with allergies.

The shampoo prepared by blending the above-mentioned compounding agents becomes almost neutral at pH 6 to 7 when the content within the above range is contained, but when it is out of this range, an appropriate pH adjusting agent is prepared. Is added in an appropriate amount to prepare to be neutral.

When the shampoo of the present invention having the above composition is left to stand, it generally separates into an oily layer composed of egg yolk oil and an aqueous layer. Before use, it may be shaken sufficiently to form a uniform emulsion state before use. Further, when the composition contains fibroin, the shampoo of the present invention is creamy. At the time of use, it can be used by applying it to the hair just like a treatment.

By using the shampoo of the present invention, moisturizing properties and softness are imparted to hair without moisturizing or treating, and a moist finish is obtained.

The shampoo of the present invention can be used not only for washing hair but also for body and face washing since it has a bactericidal effect and gives gloss to the skin.

[Specific Example] Example 1 A shampoo of the present invention was prepared by blending the following component compositions (unit: wt%) and stirring. In the following, EO indicates the proportion of polyoxyethylene in polyoxyethylene lanolin.

[0019]     Egg yolk oil (manufactured by Nippon Lecithin Chemical Co., Ltd.) 8%     35% aqueous solution of triethanolamine lauryl sulfate 38.50%     35% aqueous solution of sodium lauryl sulfate 5%     Lauric acid diethanolamide 7.0%     Polyoxyethylene lanolin (EO = 70) 2.26%     Polyoxyethylene lanolin (EO = 20) 0.28%     Perfume 0.20%     Sodium sulfate 1.0%     Sodium benzoate Suitable amount     Purified water balance

The pH of this shampoo is 6.3. In the stationary state, it was separated into an emulsion layer composed of excess yolk oil and an aqueous layer. This was shaken well to make the emulsion layer of egg yolk oil in a dispersed state, and about 5 ml was used for hair to wash the hair. Even without rinsing, the comb was washed well and the hair became moist.

Example 2 The shampoo of the present invention was prepared by mixing the following components (unit: wt%) and stirring. In the following, EO indicates the proportion of polyoxyethylene in polyoxyethylene lanolin.

[0022]     Egg yolk oil (Nippon Lecithin Chemical Industry Co., Ltd.) 6%     Fibroin 95% aqueous solution 3.5%     35% aqueous solution of triethanolamine lauryl sulfate 38.40%     35% aqueous solution of sodium lauryl sulfate 5%     Lauric acid diethanolamide 6.8%     Polyoxyethylene lanolin (EO = 70) 2.25%     Polyoxyethylene lanolin (EO = 20) 0.28%     Perfume 0.20%     Sodium sulfate 1.0%     Sodium benzoate Suitable amount     Purified water balance

The pH of this shampoo was 6.3 and it was in a cream state. When about 5 ml of this shampoo was applied to the hair to wash the hair, it combed well and had a glossy finish without any treatment.
Furthermore, when this shampoo was continuously used for damaged hair for one month or longer, the epidermis of the hair returned to the normal state.

[0024]

As described above, the shampoo of the present invention is
By maximizing the content of the egg yolk oil within the range where the cleaning ability is not deteriorated, the conditioning effect of the egg yolk oil can be expected sufficiently. In other words, even without rinsing or treatment, there is no squeak, and water and oil are appropriately added to the hair to give a moist finish. Moreover, since lecithin contained in egg yolk oil has properties as a surfactant and has penetrating power to hair and scalp, unlike other conditioning agents, it does not become sticky even if the content is increased. The above-mentioned finishing effect can be maintained without lowering the cleaning power.

Furthermore, when the shampoo of the present invention contains fibroin, which has a high affinity for hair, the synergistic action with lecithin enhances the coating effect and allows the glossy silky finish effect to be maintained. . Therefore, if the shampoo of the present invention is continuously used for damaged hair for a long period of time, it can be returned to normal hair.

Further, since the penetrating action of lecithin reduces the irritation of other scalp to other ingredients, it can be used for people with allergies.

Claims (2)

[Claims] 1. Containing 6 to 8% by weight of egg yolk oil and having a pH of 6 to
A shampoo characterized by being 7. 2. The shampoo according to claim 1, containing 2.5 to 3.5% by weight of fibroin.