JPH0563451B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a hair cosmetic, and more particularly to an anti-dandruff hair cosmetic containing a condensed tannin and a bactericide. [Prior Art] Generally, dandruff consists of secretions from sebaceous glands, secretions from sweat glands, peelings from the epidermal layer, etc., and is usually caused by increased secretion of sebaceous glands, etc., but when the skin is infected with bacteria or yeast, dandruff The occurrence of this disease is said to be promoted pathologically. For this reason, hair cosmetics containing antibacterial agents have traditionally been used to prevent dandruff. For example, antibacterial agents such as zinc pyrithione and triclosan have been used as anti-dandruff agents, but their anti-dandruff effects have not yet been satisfactory. Furthermore, some of these antibacterial agents have stability problems, and it is considered preferable to avoid using large amounts as much as possible. When used alone, for example, zinc pyrithione is 0.3% by weight or more, hinokitiol, which is also an anti-dandruff fungicide, is 0.3% by weight or more, and triclosan is 0.3% by weight or more.
It is said that an anti-dandruff effect is observed in amounts of 0.1% by weight or more, but hair cosmetics that contain large amounts of these substances have stability problems, and further problems arise in the stability of dispersed or dissolved systems. As this often occurs, it is best to avoid large quantities of these substances as much as possible. [Problems to be Solved by the Invention] In view of the above-mentioned circumstances, the present inventors have conducted extensive research to obtain a substance that has excellent anti-dandruff effects and is satisfactory in terms of stability and stability. Combining these known antibacterial agents with condensed tannins, which are also known, is extremely useful for preventing dandruff, and furthermore, it is possible to significantly reduce the concentration of the above-mentioned anti-dandruff fungicides. The present invention was completed based on the discovery that safety and stability could also be improved. [Means for Solving the Problems] That is, the present invention is a hair cosmetic containing a condensed tannin and one or more selected from the group consisting of bactericides. Next, the configuration of the present invention will be explained in detail. The condensed tannins used in the present invention are epicatechin, epigallocatechin, epicatechin gallate, and epigallocatechin gallate, and extracts from tea, Asenyaku, etc. may also be used. These condensed tannins are, for example,
It can be obtained using the method exemplified in JP-A-219384. It is well known that this condensed tannin can be used in hair cosmetics, for example,
An example is given in Publication No. 32628. For the tea extract, add 100 g of green tea to 1000 ml of boiling water and dissolve it, then wash with the same amount of chloroform to remove caffeine and pigments to obtain 1100 ml of the extract.
This is treated with the same amount of ethyl acetate to transfer the extracted components, and then the ethyl acetate layer is concentrated under reduced pressure and freeze-dried to obtain a solid content of 28.9 g. The tannin concentration in this solid content is 72%. In the hair cosmetic of the present invention, it is preferable to incorporate condensed tannins in an amount of 0.0001% by weight and 0.2% by weight as a solid content. On the other hand, examples of fungicides used in combination with condensed tannins include zinc pyrithione, triclosan,
Examples include salicylic acid, sodium benzoate, hinokitiol, photosensitizer, halocarban, chlorhexidine gluconate, benzalkonium chloride, trichlorocarbanilide, and the like. One or more of these are appropriately selected and blended. The hair cosmetic of the present invention contains the above substances.
It is preferable to add 0.0001% to 5% by weight. In the present invention, 0.0001% by weight, preferably 0.005% by weight of condensed tannin, which itself exhibits an anti-dandruff effect at a high concentration, that is, 1% by weight or more, is used.
When used in combination with the above-mentioned known antibacterial agents, even in small amounts such as 0.0001% by weight, preferably 0.003% by weight, the anti-dandruff effect can be exerted. In addition to the above-mentioned essential ingredients, the hair cosmetic of the present invention includes common ingredients that are generally included in hair cosmetics, such as oil, ultraviolet absorbers, surfactants, preservatives,
Moisturizers, fragrances, water, alcohol, thickeners, coloring agents, and the like can be added as appropriate. The hair cosmetics of the present invention broadly refer to those used for the scalp or hair, such as hair tonics,
Includes hair liquid (liquid hair conditioner), scalp emulsion, hair cream, hair shampoo, hair rinse, hair spray, etc. [Effect] When the hair cosmetic of the present invention is used, the metabolic reaction within the scalp tissue is moderately adjusted, and the occurrence of dandruff can be effectively prevented. It has become possible to significantly reduce the concentrations of sodium chloride, hinokitiol, photosensitizer, halocarban, chlorhexidine gluconate, benzalkonium chloride, trichlorocarbanilide, etc., improving safety and
A product that is satisfactory in terms of stability can be obtained. [Example] Next, the present invention will be explained in more detail by giving Examples and Experimental Examples. The present invention is not limited thereby. The blending amount is in weight%. Experimental Example (Measurement method for anti-dandruff effect) 0.005% by weight of epicatechin and 0.05% by weight of the above-mentioned antibacterial agent were blended into a shampoo, and the strength of the anti-dandruff effect was compared with that of a single-containing shampoo. Purified water 79.945g, lauryl sulfate triethanolamine 15g, coconut oil fatty acid diethanolamide 5g, the above antibacterial agent 0.05g, epicatechin 0.005g
Appropriate amounts of pigments and fragrances were sequentially added, heated, and then cooled to obtain a hair shampoo. The subjects were 63 men between the ages of 22 and 50 who had a relatively large amount of dandruff, and the test was conducted with three men assigned to each sample. Before the start of the test, the hair was washed with a shampoo containing no epicatechin or fungicides, and after washing the hair, the accumulated dandruff for two days was collected, and the amount of protein in the collected dandruff was measured (control period). Then, a shampoo containing epicatechin and/or a fungicide was used for one month, during which time dandruff was collected and the amount of protein was measured in the same manner as in the control period. Compare the average dandruff protein amount in the control period with the average dandruff protein amount in the sample period, and if the reduction rate of dandruff is 50% or more...A If it is 40% or more but less than 50%...B 20% If it is less than 40%, it is ranked as C. If it is less than 20%, it is ranked as D. The results are shown in Table 1. From the above results, it was found that when a condensed tannin, which does not exhibit a dandruff-suppressing effect when used alone, is used in combination with an antibacterial agent, an excellent dandruff-suppressing effect is shown, quite surprisingly.

【table】

[Table] Examples of the present invention are shown below. Example 1 A shampoo having the following composition was prepared.
The manufacturing method was similar to the experimental example. Sodium lauryl sulfate 5.0 Lauryl sulfate triethanolamine 5.0 Betaine lauryl dimethylaminoacetate 6.0 Ethylene glycol fatty acid ester 2.0 Polyethylene glycol 5.0 Zinc pyrithione 0.08 Epicatechin 0.005 Fragrance 0.3 Purified water Residual Example 2 A shampoo having the following composition was prepared.
The manufacturing method was the same as in Example 1. Polyoxyethylene (EO average 3 moles) Sodium lauryl sulfate 10.0 Polyoxyethylene (EO average 3 moles) Lauryl sulfate triethanolamine 7.0 Lauric acid diethanolamide 4.0 Dipropylene glycol 5.0 Triclosan 0.005 Epicatechin gallate 0.0001 Fragrance 0.3 Purified water Residual Implementation Example 3 A shampoo having the following composition was prepared, and the manufacturing method was in accordance with Example 1. Lauroylmethyltaurine sodium salt
10.0 Lauryldimethylaminoacetic acid betaine 8.0 Laurylic acid diethanolamide 4.0 Ethylene glycol fatty acid ester 1.5 Polyethylene glycol 5.0 Hinokitiol 0.1 Benzalkonium chloride 0.05 Tea extract* 0.0008 (dry solids amount) Flavor 0.3 Purified water Residual *Add green tea to boiling water The mixture was dispersed and then washed with chloroform to remove caffeine and the like to obtain an extract. This extract was treated with ethyl acetate, and the ethyl acetate layer was concentrated under reduced pressure. Example 4 A shampoo having the following composition was prepared, and the manufacturing method was the same as in Example 1. Cocoyl methyl taurine sodium salt 10.0 Obazoline (manufactured by Toho Chemical Co., Ltd.) 6.0 Coconut oil fatty acid diethanolamide 4.0 Polyoxyethylene polyoxypropylene block polymer 3.0 Benzalkonium chloride 3.0 Epigallocatechin 0.0001 Fragrance 0.3 Purified water Residual Example 5 The following formulation A shampoo consisting of the following composition was prepared and the manufacturing method was in accordance with Example 1. Lauroylsarcosine sodium salt 10.0 Lauryldimethylaminoacetic acid betaine 8.0 Laurylic acid diethanolamide 4.0 Polyoxypropylene diglyceryl ether
5.0 Halocarban 0.05 Epigallocatechin gallate 0.0005 Fragrance 0.3 Purified water Residual Shampoos of Examples 1 to 5 were all excellent in dandruff suppressing effects. Examples 6 to 9, Comparative Examples 1 to 3 Hair rinses having the formulations shown in Table 2 were prepared, and their dandruff suppressing effects were investigated. The manufacturing method was the same as in Example 1. Males between the ages of 22 and 38 were randomly selected as subjects, and the test was conducted on a total of 35 subjects, 5 for each sample. The test was conducted by washing the hair with a shampoo that does not contain anti-dandruff agents, then rinsing with the above hair rinse, and measuring the weight of dandruff accumulated during the 3 days after washing the hair before the start of the test, and the final hair wash at the end of the 1-month test. Compare the weight of dandruff accumulated over the next three days,
When the reduction rate of dandruff was 10% or less, it was determined that there was no effect. As shown in Table 2, the examples of the present invention exhibited excellent dandruff suppressing effects.

[Table] Example 10 A hair tonic having the following composition was prepared. The manufacturing method involved mixing and stirring ingredients other than purified water, and adding this to purified water. 95% ethyl alcohol (proprietary first grade) 5.0 Polyoxyethylene (40 mol) hydrogenated castor oil
5.0 Photosensitive element 201 0.003 Tea extract* 0.0006 (dry solid content) Flavor 0.5 Purified water Remaining *Extraction method similar to Example 3. This hair tonic showed excellent dandruff control effects. Example 11 A hair product (liquid hair conditioner) having the following composition was prepared. The manufacturing method was based on Example 10. 95% ethyl alcohol (proprietary first grade) 5.0 Polyoxypropylene (40 mol) Butyl ether 1.5 Squalane 2.0 Salicylic acid 0.3 Epicatechin 0.0009 Fragrance 0.5 Purified water Residual This hair liquid showed excellent dandruff control effect. Example 12 A hair cream having the following composition was prepared. Part (A) was heated and stirred, added to the similarly heated part (B) to emulsify, and then cooled to produce the product. (A) Part liquid paraffin 15.0 Cetyl alcohol 5.0 Petrolatum 4.0 Glyceryl stearate 3.0 Polyoxyethylene (20 mol) Oleyl alcohol 1.0 Sodium benzoate 0.5 Flavor 0.5 (B) Part Dipropylene glycol 1.0 Epigallocatechin 0.001 Purified water Residual The O/W type hair cream showed excellent dandruff suppressing effects. Example 13 A hair lotion having the following composition was prepared. It was produced by mixing and stirring part (A) and adding it to part (B). (A) Part 95% ethyl alcohol (proprietary grade 1) 40.0 Dimethylpolysiloxane 0.5 Liquid paraffin 0.5 Polyoxyethylene (40 mol) Hydrogenated castor oil
0.5 Acrylic resin alkanolamine liquid 0.5 Trichlorocarbanilide 0.05 Fragrance 1.0 Part (B) Dipropylene glycol 3.0 Epicatechin 0.006 Purified water Residual This hair lotion showed an excellent dandruff suppressing effect. Example 14 A hair lotion having the following composition was prepared. The manufacturing method was based on Example 13. (A) Part 95% ethyl alcohol (proprietary first grade) 50.0 Dimethylpolysiloxane 2.0 Liquid paraffin 2.0 Stearyltrimethyl ammonium chloride
0.3 Hinokitiol 0.01 Tea extract* 0.0003 (Amount of dry solids) Flavor 0.2 (B) Part 1, 3-butylene glycol 5.0 Purified water Remainder *Extraction method similar to Example 3. This hair lotion showed excellent dandruff control effects.

Claims (1)

[Claims] 1. A hair cosmetic containing a condensed tannin and one or more selected from the group consisting of fungicides.