JPS6253917A - Hair cosmetic - Google Patents

Abstract

PURPOSE:To obtain a hair cosmetic having excellent dandruff-suppressing activity and improved safety and stability, by compound a condensed tannin with a fungicide. CONSTITUTION:(A) A condensed tannin exhibiting dandruff-preventive effect at a high concentration (>=1wt%) such as epicatechin,, epicatechin gallate, or extract of tea, Japan earth, etc., and (B) a dandruff-proofing fungicide such as pyrithione zinc, triclosan, salicylic acid, photo-sensitive element, benzalkonium chloride, etc., are compounded to a cosmetic. The amounts of the components A and B are 0.0001-0.2wt% and 0.0001-5wt% based on solid component, respectively. The metabolism of the scalp tissue can be moderately controlled by the application of the cosmetic to enable the prevention of the dandruff. Since the above components are effective even in small amounts, the safety and stability of the cosmetic can be improved.

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 sebaceous gland secretions, sweat gland secretions, peeled substances 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 safety problems, and it is considered preferable to avoid using large amounts as much as possible.

When used alone, for example, zinc pyrithione is said to have an anti-dandruff effect when it is 0.3% by weight or more, hinokitiol, which is also a fungicide for dandruff, is 6.3% by weight or more, and triclosan is said to have an anti-dandruff effect when it is 0.1% by weight or more. However, hair cosmetics that contain large amounts of these substances often have safety issues, as well as stability problems in dispersed or dissolved systems. It's better to avoid using large amounts as much as possible.

[Problems to be Solved by the Invention] In view of the above circumstances, the present inventors have conducted intensive research to obtain a substance that has excellent anti-dandruff effects and is satisfactory in terms of stability and safety. , these known antibacterial agents,
When combined with condensed tannins, which are also known, it is extremely useful for preventing dandruff, and it is also possible to significantly reduce the concentration of the above-mentioned anti-dandruff fungicide, which also improves safety and stability. We have discovered that improvements can be made and have completed the present invention.

[Means for Solving the Problems] That is, the present invention provides condensed tannins and one or more fungicides selected from the group consisting of fungicides. This is a hair cosmetic made by blending J or above.

Next, the configuration of the present invention will be explained in detail.

The condensed tannins used in the present invention include shrimp catechin,
These include epigallocatechin, shrimp catechin gallate, and epigallocatechin gallate, and extracts from tea, Asen medicine, etc. may also be used. These condensed tannins can be obtained, for example, by the method exemplified in JP-A-59-219384. The use of this condensed tannin in hair cosmetics is well known and is exemplified in, for example, JP-A-54-32628.

For the tea extract, 100 g of green tea was dissolved in 10,100 O of boiling water, and then washed with the same amount of chloroform to remove caffeine and pigments to obtain 1,100 ml of the extract, which was then treated with the same amount of ethyl acetate. Then, the ethyl acetate layer was concentrated under reduced pressure and lyophilized to a solid content of 28.9
It can be obtained as 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% to 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, salicylic acid, sodium benzoate, hinokitiol, photosensitizer, halocarpan, lorhexidione gluconate, benzalkonium chloride, trichlorocarbanilide, etc. Can be mentioned. One or more of these may be appropriately selected and blended.

In the hair cosmetic of the present invention, the above substance is added to 06000
It is preferable to add 1% to 5% by weight.

In the present invention, 0.0% condensed tannin, which itself exhibits an anti-dandruff effect at a high concentration, that is, 1% by weight or more, is used.
By using even a small amount such as 0.001% by weight, preferably o, oos% by weight in combination with the above-mentioned known antibacterial agents, the concentration of the antibacterial agent can be reduced to 0.0001% by weight, preferably 0.003% by weight.
It exhibits an anti-dandruff effect from a small amount by weight.

In addition to the above-mentioned essential ingredients, the hair cosmetic of the present invention includes conventional ingredients that are generally included in hair cosmetics, such as oil, ultraviolet absorbers, surfactants, preservatives, humectants, fragrances, water, alcohol, Thickeners, coloring agents, etc. 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, hair liquids (
Includes liquid hair conditioners), scalp emulsions, hair creams, hair shampoos, hair rinses, hair sprays, 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, halocarpane, 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%.

Actual vehicle example (method for measuring dandruff prevention effect) 0.005% by weight of Ebikanakin and 0.05% by weight of the above-mentioned antibacterial agent were blended into shampoo, and the strength of the dandruff prevention effect was compared with that of a shampoo formulated alone.

79.945 g of purified water, 15 g of lauryl sulfate-triethanolamine, 5 g of coconut oil fatty acid diethanolamide, 0.05 g of the above antibacterial agent, 0.0 g of shrimp catechin
Appropriate amounts of 0.5 g, colorant, and fragrance were sequentially added, heated, and then cooled to obtain a hair shampoo.

The target audience is men between the ages of 22 and 50 who have a relatively large amount of dandruff6.
Three people were selected and each sample was assigned to three people to perform the test.

Before the start of the test, the subjects washed their hair with shrimp chicken and a shampoo containing no bactericides, and after washing, the accumulated dandruff for two days was collected, and the amount of protein in the collected dandruff was measured (control period).

Next, shampoo containing Ebika chicken 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 and less than 50%...・If it is 820% or more and less than 40%...C10%
If it was less than......it was 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 show any dandruff-suppressing effect when used alone, is used in combination with an antibacterial agent, an excellent dandruff-suppressing effect is shown, quite surprisingly.

(Margin below) Examples of the present invention are shown below.

Example 1 A shampoo consisting of the following formulation was prepared.

The manufacturing method was similar to the experimental example.

Sodium lauryl sulfate 5.0 Triethanolamine lauryl sulfate 5.0 Betaine lauryl dimethylaminoacetate 6.0 Ethylene glycol fatty acid ester 2.0 Polyethylene glycol
5.0 Zinc Pyrithione
0.08 shrimp catechin
0.005 fragrance
0.3 Purified water Remaining Example 2 A shampoo having the following formulation 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 Shrimp catechin gallate O,0QO1 Fragrance 0.3 Purified water Remaining Example 3 A shampoo having the following composition was prepared, and the manufacturing method was the same as in Example 1.

Lauroylmethyltaurine sodium salt 10.0 Lauryldimethylaminoacetic acid betaine 8.0 Lauric acid jetanolamide 4.0 Ethylene glycol fatty acid ester 1.5 Polyethylene glycol
5゜0 hinokitiol
0.1 benzalkonium chloride
0.05 Tea extract *0.0O08 (dry solids ff1) Flavoring 0.3 Purified water
The remaining green tea was added to boiling water and 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 0.3 Epigallocatechin 0 .0001 incense'f4
0.3 Purified water Remaining Example 5 'A shampoo having the following composition was prepared and the manufacturing method was the same as in Example 1.

Lauroylsarcosine sodium salt 10.0 Lauryldimethylaminoacetic acid betaine 8.0 Lauric acid diethanolamide 4.0 Polyoxypropylene diglyceryl ether 5.0 He〇Carpan 0.05 Epigallocatechin gallate o,ooos fragrance 0.3 Purified water
All of the remaining shampoos of Examples 1 to 5 had excellent dandruff suppressing effects.

Examples 6 to 9, Comparative Examples 1 to 3 Hair rinses having the compositions listed in Table 2 were prepared,
We investigated its dandruff suppressing effect. 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 drugs, then rinsing with the above hair rinse, and measuring the weight of dandruff accumulated in 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. The weight of dandruff accumulated over the next 3 days was compared, and when the dandruff reduction rate 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.

Example 10 A hair tonic having the following composition was prepared. The manufacturing method was to mix and stir ingredients other than purified water and add this to purified water.

95% ethyl alcohol (proprietary grade) 5.0 Polyoxyethylene (40 mol) Hydrogenated castor oil 0.5 Photosensitive element 201 0.003 Tea extract * 0.0006 (dry solid content) Fragrance 0.5 Purified water Residual *Extraction method similar to Example 3.

This hair tonic showed excellent dandruff control effects.

Example 11 A hair lid (liquid hair styling product) having the following composition was prepared. The manufacturing method was based on Example 10.

95χ Ethyl alcohol (proprietary grade) 5.0 Polyoxypropylene (40 mol) Butyl ether 1.5 Squalane 2.0 Salicylic acid
0.3 Ebika chicken
0.0009 fragrance
0.5 purified water
The remaining hair liquid showed excellent dandruff control effect.

Example 12 A hair cream having the following composition was prepared. (A)
Part was heated and stirred, added to the similarly heated part (B) to emulsify, and then cooled to produce the product.

(A) Liquid paraffin 15.0 Cetyl alcohol 5.0 Vaseline
4.0 Glyceryl stearate 3.0 Polyoxyethylene (20 moles) Oleyl alcohol 1.0 Sodium benzoate 0.5 Fragrance
0.5 (B) part dipropylene glycol 1,0 epigallocatechin 0.001 purified water
Residual This O/W type hair cream showed excellent dandruff suppressing effect.

Example 13 A hair lotion having the following composition was prepared. (A
) were mixed and stirred and added to part (B) to produce the product.

(A) Part 95% ethyl alcohol (proprietary grade 1) 40.0
Dimethylpolysiloxane 0.5 Liquid paraffin 0.5 Polyoxyethylene (40 mol) Hardened castor oil 0.5 Acrylic resin alkanolamine liquid 0.5 Trichlorocarbanilide 0.05 Fragrance
1.0 (B) Part Dipropylene Glycol 3.0 Shrimp Catechin 0.006 Purified Water
Residual hair lotion showed excellent dandruff control 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 grade) 50.0
Dimethylpolysiloxane 2.0 Liquid paraffin 2.0 Stearyltrimethylammonium chloride 0.3 Hinokitiol 0.01 Tea extract *0.0003 (dry solid content) Flavor 0.2 (B)
Part 1.3-Butylene gellicol 5.0 Purified water Remaining part 2:C Example 3
Similar extraction method.

This hair lotion showed excellent dandruff control effect.

Claims (1)

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