JP2012224562A - Additive for cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cosmetic excellent in antibacterial property and antioxidant action, containing a tea-leaf processed product showing a beautiful green color.SOLUTION: This additive for a cosmetic comprises a copper-processed tea leaf in which iron in chlorophyll contained in a tea leaf is replaced with copper. A cosmetic is formed by blending the additive for the cosmetic thereto.

Description

  The present invention relates to a cosmetic additive comprising a modified tea leaf component. More specifically, the present invention relates to a cosmetic additive comprising copper-treated tea leaves obtained by replacing iron in chlorophyll contained in tea leaves with copper, and a cosmetic comprising the additive.

  In recent years, paying attention to the antibacterial and antioxidant effects of substances contained in tea leaves, blending tea leaf powder and tea leaf extract into cosmetics has been carried out. Although the tea leaves themselves have a beautiful green color, the green color is easily faded. Therefore, even in tea leaf cosmetics, it is a reality that other colorants are used as coloring agents.

  Methods for preventing discoloration by treating green of plants such as tea leaves with copper are already known, and are described in, for example, Patent Documents 1 and 2. However, no example of adding a processed tea leaf processed by such a method to cosmetics is known.

Patent 4175333 JP 2009-78367 A

  An object of this invention is to provide the cosmetics which contain the tea leaf processed product which is excellent in antibacterial property and antioxidant action, and exhibits beautiful green color.

  The copper-treated tea leaves in which the iron in the chlorophyll contained in the tea leaves is replaced with copper have a green color and are found to have superior antibacterial and antioxidant activities compared to tea leaves not treated with copper. did.

That is, this invention provides the additive for cosmetics which consists of a copper processing tea leaf characterized by the iron in the chlorophyll contained in a tea leaf replacing copper. The cosmetic additive of the present invention is suitably used as an additive for imparting antibacterial and / or antioxidant properties to a product in order to color the product green. It is also preferably used as a scrub agent.
The present invention also provides a cosmetic comprising the cosmetic additive of the present invention.

  In the present invention, the tea leaves to be treated with copper are tea leaves, and the variety is not particularly limited. As tea leaves, it is preferable to use young leaves that are also used in beverages. Further, tea leaves collected from chanoki may be used as they are, or dried ones, or dried and crushed ones may be used.

  In the present specification, “copper-treated tea leaves” means tea leaves that have been treated so that iron contained in chlorophyll of tea leaves is replaced with copper. The iron in the chlorophyll is not completely replaced with copper as long as it is treated with copper as described below.

The method for obtaining a copper-treated tea leaf is not limited, and examples thereof include a method of heat-treating tea leaf in the presence of copper (Patent Document 1) and copper treatment in the presence of an acid (Patent Document 2). For example, the method described in Patent Document 1 is preferably used.
Specifically, tea leaves and water are boiled, the resulting softened tea leaves and tea leaf extract are pulverized and mixed to obtain a slurry consisting of tea leaf powder and tea leaf extract, and the slurry is stirred in the presence of copper. The solution can be heated and concentrated to obtain copper-treated tea leaves.
Alternatively, the dried tea leaf powder may be mixed with water to obtain a slurry, and the slurry may be heated and concentrated with stirring in the presence of copper to obtain a copper-treated tea leaf.
In either case, the heat-concentration may be continued until the tea leaves are dried to obtain a dry powder of the copper-treated tea leaves.

  When boiling tea leaves and water in the above method, the boiling time is not particularly limited in this step, for example, 5 minutes to 5 hours, preferably 15 minutes to 3 hours, more preferably about 30 minutes to 2 hours. Good. The boiling may be performed under pressure, in which case the heating time may be shortened.

  In the step of heating and concentrating the slurry in the presence of copper, for example, the slurry may be put into a copper pot and heated with stirring. Alternatively, the slurry may be charged together with metallic copper into a kettle and heated and stirred. The heating may be performed so that the slurry temperature is 60 to 120 degrees, preferably 80 to 100 degrees. The heating time is not limited. For example, the heating time may be about 5 minutes to 5 hours, preferably 15 minutes to 3 hours, more preferably about 30 minutes to 2 hours. When obtaining a dry powder of copper-treated tea leaves, the heat treatment may be continued until it becomes a dry powder.

  The obtained copper-treated tea leaves may be dried as necessary to be used as dried copper-treated tea leaves. Copper-treated tea leaves that have been dried and powdered are particularly preferably used as cosmetic additives. The drying method is not particularly limited, and the heat-concentration treatment may be performed until it is in a dry state, or the copper-treated tea leaves with moisture remaining after the heat treatment may be dried by a known method such as hot air or hot air. Good. If necessary, the obtained dried copper-treated tea leaves may be crushed and / or classified to obtain particles of a desired size.

  The copper-treated tea leaves obtained in this way not only maintain a vivid green color, but also have excellent antibacterial and antioxidant effects. The additive for cosmetics of the present invention comprising such copper-treated tea leaves has the effect of providing excellent antibacterial and antioxidant effects as well as coloring, and can be suitably blended in various cosmetics.

  The cosmetic composition comprising the copper-treated tea leaves of the present invention is not particularly limited in its dosage form or product form, and is a water-in-oil type, an oil-in-water type, a water-dispersed type, a pressed shape, a solid, or a powder. It can be made into a dosage form. Product forms include facial cleansing foam, makeup remover, lotion, serum, milk, cream, massage cream, pack, makeup base, sunscreen and other skin cosmetics, powder foundation, liquid foundation, whitening powder, eye shadow, Finishing cosmetics such as eyeliner, mascara, eyebrow, blusher, concealer, lipstick, lip balm, hair shampoo, hair rinse, hair tonic, hair treatment, liquid hair conditioner, set lotion, hair spray, hair dye Examples thereof include cosmetics, powder sprays, antiperspirants such as roll-on, shaving cosmetics such as shaving foam, shaving gel, and shaving lotion.

  The cosmetic additive of the present application has antibacterial activity and antioxidant activity, and among these, it is suitably blended in cosmetics used for the purpose of whitening and preventing acne and cleaning cosmetics. Further, since the particles are soft and less irritating to the skin, they are also preferably used as a scrub agent.

  The cosmetic of the present invention may be prepared by blending the cosmetic additive of the present invention into a conventionally known formulation as various cosmetics. The blending amount of the cosmetic additive of the present invention is not limited, and may be appropriately determined within the range of 0.01% to 10% depending on the purpose. Typically, the antibacterial property is intended. 0.01% to 10%, 0.1% to 5% as a whitening agent, 0.1% to 10% as a colorant, and 0.1% to 10% copper-treated tea leaf powder as a scrub agent. Is preferred.

The present invention will be described in detail below with reference to examples. However, the following examples do not limit the present invention. All blending amounts are in weight percent unless otherwise specified.

[Preparation of copper-treated tea leaves]
Used tea leaves: dry green tea leaves (powder)
20 g of dried tea leaves were put into 80 g of distilled water and stirred until it became a slurry. Next, the obtained slurry was put into a copper pan, and heated with stirring so that the slurry temperature became 90 to 100 ° C. It heated for about 40 minutes and the water | moisture content was evaporated, and the powdery copper treatment tea leaf was obtained.
As the copper untreated tea leaves, the dry green tea powder before the copper treatment was used.

[Evaluation of antibacterial activity]
The antibacterial activity of the obtained copper-treated green tea was verified. Plates of Examples 1 to 7 and Comparative Examples 1 to 7 in which copper-treated green tea and copper-untreated green tea were mixed in an agar medium at the concentrations shown in Tables 1 and 2 were prepared, respectively, and antibacterial activity against bacteria and fungi I investigated. As the agar medium, SCD agar medium was used for bacteria, and GP agar medium was used for fungi.

  In the antibacterial test, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Candida albicans and Aspergillus niger were used as fungi. The sample of each Example and Comparative Example was streaked, the bacteria were cultured at 37 ° C. for 48 hours, and the fungi were cultured at 25 ° C. for 96 hours to confirm the growth status. The results are shown in Table 3. The case where growth was not observed was shown as-, and the case where growth was observed was shown as +.

  From the results of Table 3, in Examples 1 to 7, it was found that the copper-treated matcha tea has high antibacterial activity. Moreover, it turned out that the antibacterial spectrum is narrow in the green tea which has not performed copper treatment from the result of Comparative Examples 1-7. In other words, it was found that the antibacterial activity is dramatically improved by treating the matcha with copper.

[Evaluation of antioxidant activity (DPPH radical scavenging activity)]
For Examples 8, 9, and 10 and Comparative Examples 8, 9, and 10, the antioxidant activity ability was evaluated by the DPPH method. Ascorbic acid was used as a positive control. The measured DPPH absorbance was evaluated according to the following criteria. The evaluation results are shown in Table 4. The DPPH method is a test method for measuring the antioxidant activity ability. Examples 8 and 9 were prepared in advance in Tris-HCl buffer containing DPPH (1,1-diphenyl-2-picrylhydrazyl). 10 and Comparative Examples 8, 9, and 10 were added with 80% ethanol extracts, and the ratio of DPPH radical elimination was measured with a spectrophotometer.
The erasure rate of each sample was calculated by the following formula.
Erase rate (%) = (1-sample absorbance / blank absorbance) × 100

  Further, in order to confirm the stability of the sample, the sample was stored at 40 ° C. for 2 weeks, and then the same measurement was performed. The test results are shown in Table 4. Ascorbic acid significantly decreased DPPH radical scavenging activity after storage at 40 ° C for 2 weeks. In Comparative Examples 2, 5, and 6, a decrease in erasing action was observed. In Examples 2, 5, and 6, there was no change in the erasing action. From the above, it was found that copper-treated matcha tea shows a stable and excellent DPPH radical scavenging action.

〔sensory evaluation〕
(Preparation of each sample)
Massage creams of Examples 11 to 18 and Comparative Examples 11 to 20 were prepared by a conventional method according to the compositions shown in Tables 5 and 6 using the prepared copper-treated matcha and copper-untreated matcha as a scrub agent.

  The polyethylene powder used was a polyethylene bead made by Toyo Pigment. As the walnut shell, the trade name WN grid made by Ichimaru Falcos was used.

(Sample evaluation)
Each sample of Example 8 to Example 15 and Comparative Example 8 to Comparative Example 17 was used by 10 professional panelists in the form of a facial cleanser, and used feeling (skin irritation feeling, foreign object feeling), scrub feeling ( The scrub effect) and the stability of the preparation (discoloration after storage at 40 ° C. for 1 month) were evaluated according to the following evaluation criteria. The results are shown in Tables 5 and 6.

<Evaluation criteria: Skin irritation and foreign body feeling>
○: Almost △: Feel a little ×: Feel (pain)

<Evaluation criteria: Scrub effect>
◎: Sufficient ○: Yes △: Not much ×: Not

<Evaluation criteria: Stability (discoloration after storage at 40 ° C for 1 month)>
○: None ×: Available

  As shown in Tables 5 and 6, the skin cleanser composition according to the present invention is excellent in feeling of use without causing unpleasant skin irritation and foreign body feeling, and can obtain an appropriate scrubbing effect. it can.

  On the other hand, about the sample of the comparative example using copper untreated green tea as a scrub agent, it does not feel a skin irritation feeling or a foreign body feeling, but it cannot obtain a scrub effect compared with copper treated green tea. It was not suitable as a scrub agent.

  Moreover, although the sample of the comparative example which mix | blended the polyethylene powder and walnut shell conventionally used as a hard scrub agent was obtained, although the outstanding scrub effect was acquired, it resulted in giving an unpleasant skin irritation feeling and a foreign material feeling.

  Hereinafter, the formulation example of the cosmetics using the copper processing tea leaves of this invention is shown. The present invention is not limited to these.

Formulation Example 1 Whitening liquid

(Manufacturing method) The raw material which belongs to A is heated to 70 degreeC, and after complete dissolution, it cools to room temperature. Thereafter, the raw materials belonging to B were mixed to obtain a whitening liquid (pH: 6.5).

Formulation example

Formulation example Moisture cream

(Manufacturing method) The raw material of the oil phase part belonging to A and the raw material of the water phase part belonging to B are heated to 70 ° C. and completely dissolved, and then the oil phase part is mixed with the aqueous phase part and emulsified with an emulsifier. . The emulsion was cooled to 30 ° C. to obtain a moisture cream (pH: 7.0). The resulting moisture cream had a beautiful light green color.

Formulation example facial cream

(Manufacturing method) After heating the raw material of the oil phase part belonging to A and the raw material of the water phase part belonging to B to 75 ° C. and dissolving, the water phase part was slowly mixed with the oil phase part, and then stirred well, It cooled to 30 degreeC and the face-wash cream (pH: 8.5) was obtained. The obtained face-wash cream had a beautiful light green color.

Formulation example Sunscreen cream

(Manufacturing method) The raw material of the oil phase part belonging to A and the raw material of the water phase part belonging to B are heated to 75 ° C. and completely dissolved, and then the oil phase part is mixed with the aqueous phase part and emulsified with an emulsifier. . The emulsion was cooled to 30 ° C. to obtain a sunscreen cream (pH: 6.0).

Formulation example Liquid foundation (Shakewell type)

Formulation example soap

(Manufacturing method) The raw material of the oil phase part belonging to A and the raw material of the water phase part belonging to B are heated to 70 ° C. and completely dissolved, and then the oil phase part is mixed with the aqueous phase part and emulsified with an emulsifier. . The emulsion was cooled to 30 ° C. to obtain soap (pH: 8.5). The obtained soap had a beautiful light green color.

Claims (7)

  Cosmetic additive consisting of copper-treated tea leaves in which iron in chlorophyll contained in tea leaves is replaced with copper.   The cosmetic additive according to claim 1, wherein the copper-treated tea leaves are obtained by treating tea leaves by a method comprising heating the tea leaves in the presence of copper.   The additive for cosmetics according to claim 2, obtained by a method comprising a step of concentrating a mixture of tea leaves and water while heating in a copper pot.   The cosmetic additive according to any one of claims 1 to 3, which is a dry powder of copper-treated tea leaves.   The cosmetic additive according to claim 4, which is used as a scrub agent.   A cosmetic comprising the cosmetic additive according to any one of claims 1 to 5.   The cosmetic according to claim 5, which is a scrubbing skin cleanser.