Scalp cosmetic for hair washing, and body shampoo

Abstract

To provide a scalp cosmetic for hair washing and a body shampoo that utilize nanobubble water as a diluent for a surfactant but suppress repulsion between the surfactant and nanobubbles contained in the nanobubble water thereby preventing any adverse effect on the cleansing ability of either component.SOLUTION: A nanobubble scalp cosmetic for hair washing utilizing nanobubble water as a solvent comprises: nanobubble water that contains bubbles smaller than 1 μm in a diameter at least at prescribed bubble density, and exhibits so large wettability as to have a contact angle measured by the sessile drop method smaller than that of pure water; and at least an amphoteric or cationic surfactant or hair conditioning component.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a hair cosmetic product for washing hair and a body shampoo that use nanobubble water as a solvent. [Background technology]

[0002] In recent years, nanobubble water, which contains a large number of minute bubbles, has been used as a means of improving the cleaning ability of cleaning water. The following documents exist regarding the technology of cleaning with nanobubble water. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2017-217585 [Patent Document 2] Patent Publication No. 2020-094088 Summary of the Invention [Problem to be solved by the invention]

[0004] Although the detailed action and effect of the reason for the improved cleaning effect is not clear, it is thought that when the nanobubble water, which has a large number of interfaces due to the numerous nanobubbles whose air bubble surfaces form interfaces, comes into contact with dirt, it penetrates between the dirt and the object to be cleaned, and the two are separated by the action of the interface.

[0005] Therefore, it is easy to imagine that the cleaning effect can be enhanced by using nanobubble water as a dilution medium for hair cosmetics used for cleaning, such as regular shampoos and treatments.

[0006] However, nanobubbles themselves have a negative charge in water, and when using anionic surfactants whose hydrophilic groups are positive (negatively ionized), the nanobubbles and the surfactant repel each other, which creates a problem of weakening the cleaning effect.

[0007] Therefore, an object of the present invention is to provide a scalp cosmetic and a body shampoo for washing hair that use an amphoteric or positive (cationized) surfactant to suppress the repulsion between nanobubbles and the surfactant and thus do not adversely affect the cleaning effect of either. [Means for solving the problem]

[0008] The nanobubble scalp cosmetic for washing hair that solves the above-mentioned problems is characterized by comprising nanobubble water that contains bubbles smaller than 1 μm in diameter at least at a predetermined bubble density and has a smaller contact angle by the sessile drop method than pure water, making it highly wettable, and at least an amphoteric or cathodic surfactant or a hair conditioning component.

[0009] In addition, a body shampoo that solves the above problems is characterized by comprising nanobubble water that contains bubbles smaller than 1 μm in diameter at least at a predetermined bubble density, has a smaller contact angle by the sessile drop method than pure water, and has high wettability, and at least an amphoteric or cathodic surfactant. Effect of the Invention

[0010] The nanobubble shampoo according to the present invention aims to provide a hair cosmetic product for washing hair and a body shampoo which suppresses the repulsion between the nanobubbles and the surfactant contained in the nanobubble water used as a diluent for the surfactant, thereby not affecting the cleaning power of both. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a diagram showing the results of an inspection of the bubble state of the nanobubble shampoo of the first embodiment. [Diagram 2] FIG. 1 is an explanatory diagram of a contact angle test of nanobubble water. [Diagram 3] FIG. 13 is a diagram showing the results of an examination of the contact angle of nanobubble water by the sessile drop method. [Figure 4] FIG. 13 is a diagram showing the results of an inspection of the bubble state of the nanobubble treatment according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (First embodiment) As a first embodiment of the present invention, a nanobubble shampoo will be described. The nanobubble shampoo has the following characteristics:

[0013] [Table 1]

[0014] Of the ingredients shown in Table 1, "water" is nanobubble water, which will be described below. Cocamidopropyl betaine and sodium cocoamphoacetate are both amphoteric (amphoteric) surfactants of the carboxylate surfactant system, and olefin (C14-16) sodium sulfonate, potassium cocoyl hydrolyzed collagen, and sodium lauroyl hydrolyzed silk are anionic surfactants.

[0015] Therefore, the above-mentioned amphoteric surfactants such as cocamidopropyl betaine do not repel nanobubble water, but utilize the surface activity of both to enhance the cleaning power of shampoo.

[0016] The results of an analysis of the state of the nanobubbles in the nanobubble shampoo (conducted by the Nikkensen Quality Evaluation Center, a general incorporated foundation) are shown in Figure 1. As shown in the figure, the average size of the bubbles contained in the nanobubble shampoo was 148.9±6.2 nm, the most frequent value was 129.7±26.2 nm, and the concentration (bubble density) was 2.28×10 11 + / - 1.62×10 10 It is.

[0017] Next, the characteristics of the contact angle of the nanobubble water used in the nanobubble shampoo of this embodiment will be described with reference to Figs. 2 and 3.

[0018] The contact angle measured by the drop method was measured by dropping a 2 μL drop of water onto a measurement plate (a Viewlux Bioskin plate) having specified surface conditions using the drop method, as shown in Figure 2, and measuring the angle of the interface with the measurement plate.

[0019] Due to surface tension, if the contact angle is large, the hydrophilicity of the sample to the measurement plate is low and the degree of wettability is small. On the other hand, if the contact angle is small, the hydrophilicity of the sample to the measurement plate is high and the degree of wettability is large.

[0020] That is, as shown in the "Measurement Results" in FIG. 2, in this embodiment, the nanobubble water used as a diluting component of the surfactant has a smaller contact angle and a larger wettability than pure water (Millipore water) under any time elapsed condition.

[0021] Therefore, in the nanobubble shampoo of the present embodiment, when ingredients such as surfactants are added, the hydrophilicity of the shampoo and the scalp surface can be increased, improving the transportability of the cleansing ingredients to the skin texture, and allowing the cleansing ability to be more effectively exerted.

[0022] In addition, if the amount used is limited to a small amount and irritation is reduced, cationic surfactants such as cationic benzalkonium chloride may be used as part of the nanobubble shampoo.

[0023] Second embodiment Next, a nanobubble treatment according to a second embodiment of the present invention will be described. The nanobubble treatment has the characteristics of the components shown in Table 2 below.

[0024] [Table 2]

[0025] Among the components shown in Table 1, "water" is the nanobubble water described in the first embodiment, and dimethicone and amodimethicone are cationized silicone compounds, which are a type of positively ionized hair conditioning component (agent) that has been cationized (carries a positive charge) to facilitate adsorption to hair.

[0026] For this reason, by actively coming into contact with nanobubble water, dimethicone and amodimethicone utilize the surfactant power of both compounds together with the air bubbles in the nanobubble water to improve the affinity of the conditioner to the scalp and hair, thereby enhancing the conditioning effect.

[0027] Since the nanobubble water contains the same components as those in the first embodiment, the contact angle is reduced, thereby increasing hydrophilicity, and as described above, this promotes the penetration of conditioner components into the skin texture, thereby enhancing their effectiveness.

[0028] As for the body shampoo using nanobubble water, the action and effect of the nanobubble water and the surfactant in the first embodiment are the same, and therefore the description thereof will be omitted.

[0029] As described above, in the scalp cosmetic product for washing hair and the body shampoo of the present invention, by using an amphoteric surfactant or a cationic surfactant or a conditioner component in response to the negatively charged nanobubbles, it is possible to produce a product that suppresses the repulsion between the two and does not affect the cleaning effect or conditioning of each.

Claims

1. A nanobubble scalp cosmetic for washing hair that uses nanobubble water as a solvent, nanobubble water containing bubbles having a diameter of less than 1 μm at a predetermined bubble density and having a smaller contact angle by a sessile drop method than pure water and having high wettability; at least an amphoteric or cationic surfactant or hair conditioning ingredient; A nanobubble scalp cosmetic for washing hair, comprising:

2. The nanobubble scalp cosmetic for washing hair according to claim 1, The surfactant is a carboxylate surfactant, The nanobubble scalp cosmetic for washing hair is characterized in that the scalp cosmetic is a shampoo.

3. The nanobubble scalp cosmetic for washing hair according to claim 1, the hair conditioning ingredient is a cationized silicone compound; The nanobubble scalp cosmetic for washing hair is a treatment.

4. A body shampoo containing nanobubble water as a solvent, nanobubble water containing bubbles having a diameter of less than 1 μm at a predetermined bubble density and having a smaller contact angle by a sessile drop method than pure water and having high wettability; at least an amphoteric or cathodic surfactant; A nanobubble body shampoo comprising:

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