JPH08291018A - Humectant for cosmetic - Google Patents

Abstract

PURPOSE: To obtain the subject humectant containing, 0.01-5wt.% of caffeine and/or anhydrous caffeine as active ingredient(s), having excellent humectant effect and functional characteristic with no stickness, and having high versatility with no limitations of preparations compatible therewith. CONSTITUTION: This humectant contains, as active ingredient(s), 0.01-5wt.% of caffeine and/or anhydrous caffeine. Using this humectant, the following various forms of cosmetics can be prepared; namely: face lotion, cream, milky lotion, foundation, pack, bathing agent, hair tonic, hair grooming agent, hair grower, cologne, face wash, body shampoo, shampoo, rinse, etc. Combination of the humectant with conventional one is synergistically effective or further effective. The caffeine as a kind of alkaloid, is found in tea leaves, fruits of coffee, cacao and cola, etc., and can be obtained by extraction from e.g. tea leaf tailings with e.g. ethanol, or by synthesis using urea as raw material. The anhydrous caffeine can be obtained by heating hydrous caffeine to 80 deg.C.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly versatile cosmetic moisturizer having excellent moisturizing effect and organoleptic properties without stickiness, and is not restricted by compatible preparations.

[0002]

2. Description of the Related Art Cosmetics contain a moisturizer for the purpose of maintaining the homeostasis of the skin and protecting the skin from dryness in winter. Moisturizers that have been conventionally used are represented by water-soluble polyhydric alcohols represented by glycerin, propylene glycol and sorbitol, water-soluble polymers represented by hyaluronic acid and xanthan gum, pyrrolidone carboxylates and amino acids. Examples thereof include natural moisturizing factors and intercellular lipids represented by ceramide.

Although conventional moisturizers have some effects, water-soluble polyhydric alcohols and water-soluble polymers often have a sticky feeling during and immediately after application, which is not always preferable in terms of sensory properties. . In addition, natural moisturizing factors and intercellular lipids are often not fully effective due to restrictions on the concentration and compatible formulation in the formulation,
The development of new moisturizers was required.

[0004]

That is, the object of the present invention is to provide a highly versatile cosmetic moisturizer having excellent moisturizing effect and organoleptic properties without stickiness, and is not restricted by compatible preparations. Especially.

[0005]

[Means for Solving the Problems] We found that the extract extracted from tea leaves and mate tea with water and water-containing organic solvents and the residue of caffeineless coffee were mixed into cosmetics and the sensory evaluation of them made the skin moisturized. It has been confirmed that it has high moisture retention and moisturizing properties. Therefore, when caffeine and / or anhydrous caffeine, which are these contained ingredients, were taken and various evaluations were made, they had an excellent moisturizing effect, and when incorporated into cosmetics, they have excellent moisturizing properties and can be applied to a wide range of formulations. Then, they found that they also have excellent sensory characteristics, and completed the present invention.

Accordingly, the present invention relates to a cosmetic moisturizer, characterized in that it comprises caffeine and / or anhydrous caffeine.

The details of the configuration will be described below.

Examples of caffeine and / or anhydrous caffeine used in the present invention include those prepared by the following method.

Caffeine is a kind of alkaloid, which is 1 to 5% in tea leaves, 1 to 2% in coffee beans, 0.2% in cocoa fruits, and 1 to 2% in cola fruits. 0.2 to mate
2% etc. are included. Although it has been isolated from tea leaf scraps in the olden days, it is mainly extracted and isolated as a by-product at the time of caffeine-less co-hi production, but a synthesis method by Traube using urea as a raw material, or its It is also manufactured industrially by the improved method.

As an example of extraction, for example, tea leaf scraps are extracted several times with hot water and filtered, tannins from the filtrate are added with lead monoxide lime milk, the mixture is filtered off, and the filtrate is evaporated to dryness. The residue is extracted with ethanol, ethanol is distilled off, and the obtained caffeine is recrystallized from hot water using decolorizing carbon. Anhydrous caffeine is obtained by heating a water-containing substance to 80 ° C. Further, the by-product at the time of producing caffeine-less coffee is melted in hot water, extracted with activated carbon several times, purified, dried and pulverized to obtain the product.

Examples of the synthesis include, for example, a synthesis from a pyrimidine ring, a synthesis from an imidazole ring, a synthesis from uric acid and formamide.

The concentration of caffeine and / or anhydrous caffeine used in the present invention varies depending on the formulation to which it is applied, but is preferably 0.01 to 5% by weight in order to exert its effect.

The formulations of the moisturizer of the present invention include lotions, creams, emulsions, foundations, packs, bath agents, hair tonics, hair styling agents, hair nourishing agents, colognes, face wash, body shampoos, shampoos and conditioners. Etc.

In the preparation to which the moisturizing agent of the present invention is applied, the moisturizing agent of the present invention can be added even if a base, a fragrance, an antiseptic, a preservative, a medicinal substance, a surfactant and the like for constituting the preparation are added. Does not impair the performance of.

When the humectant of the present invention is used in combination with a conventional humectant, the effects are synergistic and more effective. Also,
The effect of improving the sticky feeling by the water-soluble polymer and water-soluble polyhydric alcohol is recognized. However, an increase in the blending amount of natural moisturizing factor and intercellular lipid cannot be expected.

[0016]

The present invention will be described in more detail with reference to the following examples. Unless otherwise specified,% indications below are
Indicates weight percent.

A moisturizing test and a sensory test will be described prior to Examples.

1. Moisture retention test A sample prepared as a 2.0% aqueous solution was applied to the forearm flexion side of a healthy person, and the water content after 30 minutes was measured as an electric conductivity with an impedance meter. The results are shown as relative values when the value before coating is 100.

2. Sensory test A sensory test was carried out by 20 female panelists to evaluate whether or not a sticky feeling was felt during and after the application of cosmetics, and the number of panelists who answered "not felt" was shown.

[0020]

[Table 1]

As is clear from the results shown in Table 1, the aqueous solutions of caffeine and / or anhydrous caffeine of the present invention were excellent in both the moisturizing test and the sensory test. Although glycerin is excellent in moisturizing property, many panelists answered that it had a sticky feeling in a sensory test, which was not preferable.
Sodium pyrrolidonecarboxylate was not sufficiently moisturizing and was slightly inferior in the sensory test.

Example 1 Lotion

[0023]

[Table 2]

A lotion containing the moisturizer of the present invention having the composition shown in Table 2 was prepared, and the moisturizing test and the sensory test were conducted. As a result, the moisturizing test was 180%, and the sensory test was performed by 18 persons. It was excellent in both respects, and a synergistic effect with glycerin was observed in the moisturizing test, and a sticky feeling eliminating effect by glycerin was observed in the sensory test.

Example 2 Emulsion

[0026]

[Table 3]

Example 3 Hair Tonic

[0028]

[Table 4]

Example 4 Shampoo

[0030]

[Table 5]

Example 5 Face wash

[0032]

[Table 6]

Example 6 Hair nourishing agent

[0034]

[Table 7]

Example 7 Bath agent

[0036]

[Table 8]

The cosmetics containing the moisturizing agent of the present invention of Examples 2 to 7 were all excellent in the above moisturizing test and sensory test. However, the moisturizing test for the shampoo, the bath agent and the face wash was conducted only by a sensory test as to whether or not a moist feeling after use was felt.

[0038]

Industrial Applicability As described above, it is apparent that the present invention provides a highly versatile cosmetic moisturizer having excellent moisturizing effect and organoleptic properties without stickiness, and is not restricted by compatible preparations. Is.

Front page continuation (72) Inventor Izumiko Murakami 5-3 28, Kotobuki-cho, Odawara-shi, Kanagawa Kanebo Co., Ltd., Cosmetics Research Institute (72) Inventor Mikio Terao 5-28, Shou-cho, Odawara-shi, Kanagawa Cosmetics Research Institute, Spin Co., Ltd. (72) Kazuhisa Masuda, 5-17-4 Ginza, Chuo-ku, Tokyo Kanebo Cosmetics Division, Kanebo Ltd.

Claims (1)

[Claims] 1. A moisturizer for cosmetics, which comprises caffeine and / or anhydrous caffeine.