JP2011057658A - Cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of using a minutely pulverized bamboo in a cosmetic, while currently titanium oxide is mainly used as a material for giving hiding power to cosmetic and no minute powder of plants has been known as a material for giving hiding power although weak, and for bamboo powder, development has been proceeded mainly paying attention on its antibiotic activity but no investigation has been carried out on its characteristic as a pigment. <P>SOLUTION: This cosmetic having appropriate hiding power and gloss can be obtained by compounding a minutely pulverized bamboo powder especially that having an average primary particle diameter in the range of 1-15 μm. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a cosmetic containing a finely pulverized bamboo powder.
More specifically, the present invention relates to a cosmetic material having an appropriate hiding power and excellent gloss by blending finely pulverized bamboo powder.

  Hereinafter, the technical background of the present invention will be described. As shown in Patent Documents 1 and 2, bamboo powder is blended in sanitary napkins and paper diapers, or blended in an external deodorizing and disinfecting agent, focusing on the deodorizing and antibacterial ability of bamboo. Further, as shown in Patent Document 3, a hair styling compounded with bamboo charcoal obtained by carbonizing bamboo, and a skin cosmetic compounded with bamboo extract as shown in Patent Document 4, are also known.

JP-A-5-293136 JP-A-5-306232 JP 2003-313114 A JP 9-315930 A

  Bamboo powder has been developed mainly focusing on its antibacterial properties, and no study has been conducted focusing on the properties of bamboo powder itself as a pigment. Conventionally, titanium oxide has been mainly used as a material for concealing cosmetics, and it has not been known that the material can be concealed with fine plant powder.

  Therefore, as a result of intensive studies, the present inventor has found that a cosmetic having an appropriate hiding power and gloss can be obtained by blending fine bamboo powder.

  That is, the present invention is a cosmetic containing a finely pulverized bamboo powder.

  A second aspect of the present invention is the cosmetic described above, wherein the finely pulverized bamboo powder is obtained from a bamboo skin.

    A third aspect of the present invention is the cosmetic described above, wherein the average primary particle diameter of the finely pulverized bamboo powder is in the range of 1 to 15 μm.

  As described above, according to the present invention, it is clear that a cosmetic having an appropriate hiding power and excellent gloss can be obtained by blending finely pulverized bamboo powder.

Hereinafter, the present invention will be described in detail.
In the cosmetic of the present invention, bamboo finely pulverized powder is blended. Bamboo used in the present invention refers to a plant belonging to the family Gramineae, for example, Mosouchiku, Madake, Hachiku, Hoteiku, Kikkochiku, Horaichiku, Narihiratake, Chishimasa, Tochiku, Shihochiku, Kanchiku, Yadatake, Medake and the like. Bamboo may be crushed by pulverizing the trunk or crushed after separating the epidermis, but it is preferable to use the epidermis. Moreover, you may use the bamboo dried beforehand. The finely pulverized powder referred to in the cosmetic of the present invention includes those obtained by pulverizing bamboo so that the average primary particle diameter falls within the range of 1 to 20 μm, more preferably 1 to 15 μm. The measurement of the average primary particle diameter and the shape observation are preferably studied using an electron microscope observation or a particle size distribution meter. When the average primary particle size is less than 1 μm, there is a problem that gloss is difficult to occur, and when it exceeds 20 μm, there is a problem that adhesion to the skin is deteriorated. In the cosmetic of the present invention, it is preferable to use bamboo that has been mechanically pulverized. The blasting method is not preferable because there is a risk of mixing explosive-derived components into cosmetics.

  The finely pulverized bamboo powder used in the cosmetic of the present invention may be separately subjected to drying treatment, washing, sterilization treatment, deodorization treatment, and bleaching treatment.

  In the cosmetic of the present invention, the finely pulverized bamboo powder thus obtained can be blended in the range of 0.1 to 99.9% by mass relative to the mass of the cosmetic. When optical functions such as hiding power and gloss are expected, it is preferable to blend bamboo finely pulverized powder in the range of 1.0 to 99.9% by mass with respect to the mass of the cosmetic.

  In the cosmetic of the present invention, as a component other than the finely pulverized bamboo powder, various materials usually used in cosmetics, for example, pigments, ultraviolet absorbers, ultraviolet scattering agents, oil agents, surfactants, fluorine compounds, resins Ingredients such as stickers, preservatives, fragrances, humectants, salts, solvents, antioxidants, chelating agents, neutralizing agents, pH adjusters, insect repellents, physiologically active ingredients, and the like can be used.

  In addition to makeup cosmetics such as foundations, lipsticks, eye shadows, mascaras, blushers, white powder, nail colors, concealers, etc., the cosmetics of the present invention include the foundations of creams, emulsions, cleansing agents, sunscreen agents, packs, etc. It can also be used effectively in hair cosmetics such as cosmetics, hair dyes and conditioners, and in whole body cosmetics such as body soaps and body powders.

  The present invention will be described in more detail with reference to examples below, but the present invention is not limited thereto.

[Examples 1 to 3, Comparative Example 1]
A foundation was obtained by the formulation and production method shown in Table 2. In addition, the unit of a mixture ratio is the mass%. As a finely pulverized powder of bamboo, a pulverized material of mushroom skin was used. An example of a scanning electron micrograph of this finely pulverized bamboo powder is shown in FIG. Table 1 shows the particle size of the finely pulverized bamboo powder. The average primary particle size (cumulative 50% particle size) was measured by a dynamic light scattering method using MICROTRACK MT3300EXII type manufactured by Nikkiso Co., Ltd. and using isopropyl alcohol.

Production Method The powder components were mixed well using a mixer. To this was added the oily component that was uniformly dissolved and mixed, and the mixture was well stirred. Subsequently, the product (foundation) was obtained by stamping into a metal plate using a metal mold.

[Examples 4-6, Comparative Examples 2-3]
A W / O liquid foundation was obtained by the formulation and manufacturing method shown in Table 3. In addition, as a finely pulverized powder of bamboo, a pulverized Moso bamboo skin (average primary particle size: 9.1 μm) was used. In addition, the unit of the mixture ratio in Table 3 is mass%.

Manufacturing Method After heating the oil phase to 70 ° C. and mixing uniformly, the well-mixed powder component is added and stirred. Next, the mixture was heated to 70 ° C., a uniformly mixed aqueous phase was added, stirred, cooled to room temperature, and filled into a container to obtain a product.

[Examples 7 to 9, Comparative Example 4]
According to the formulation and manufacturing method shown in Table 4, cheek red was obtained. As the finely pulverized bamboo powder, the powder used in Example 1 was used as it was. Moreover, the unit of the blending ratio in Table 4 is mass%.

Production Method The powder components were mixed well using a mixer. The oily component was added here and mixed well with stirring. Subsequently, the product was obtained by filling the container.

Evaluation of Examples and Comparative Examples The evaluation of Examples and Comparative Examples was performed in a questionnaire format using 10 panelists. The questionnaire was evaluated with the average score of all the panelists, with 5 being the best evaluation and 1 being the worst. Therefore, the higher the score, the higher the evaluation for the evaluation item. The evaluation results are shown in Table 5.

  From the results of Table 5, it can be seen that the example of the present invention shows superior performance in each evaluation item as compared with the comparative example. From the results in Table 5, it can be seen that the finely pulverized bamboo powder has a suitable hiding power and is excellent in gloss.

  Example of scanning electron micrograph of finely ground bamboo powder

Claims (3)

  Cosmetics containing finely pulverized bamboo powder.   The cosmetic according to claim 1, wherein the finely pulverized bamboo powder is obtained from a bamboo skin.   The cosmetic according to claim 1 or 2, wherein the average primary particle diameter of the finely pulverized bamboo powder is in the range of 1 to 15 µm.