JP2005139130A - Cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a cosmetic not only effectively exhibiting excellent ameliorating effects on the skin but also providing extremely superior sense of use. <P>SOLUTION: This cosmetic contains fine particles charged with static electricity. The fine particles are inorganic pigments and/or vesicles with lipid membranes, and the amount of the formulated fine particles is 0.0001-1 wt.%. The cosmetic not only exhibiting the excellent effects for ameliorating the skin but also providing the extremely superior sense of use can be obtained by formulating the fine particles previously charged with the static electricity. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cosmetic that not only has an excellent improvement effect on the skin but also has a good feeling of use.

  With the diversification of needs for cosmetics, development of each cosmetic ingredient is underway. Among them, as for the fine particles for cosmetics, surface treatment and compounding are attracting attention according to the purpose. For example, fine particles obtained by coating a fine particle with a silicone or an organic compound to have water and oil repellency. Is widely used as a cosmetic material.

However, a fine particle obtained by simply coating one type of fine particle with an organic compound is not sufficient as a make-up effect when blended into cosmetics, and two or more types of fine particles and a polymer compound are combined. A method is being considered.
Japanese Patent Laid-Open No. 63-63035 discloses that a pigment or the like is provided on the outer peripheral surface of a spherical fine particle and further microencapsulated with a polymer compound layer in order to prevent a decrease in gloss and saturation of the pigment. Has been. Japanese Patent Laid-Open No. 03-181411 discloses that a pigment is fixed to the surface of an inorganic fine particle body with a fixing agent, and is described as being effective for wrinkle concealment and the like. Japanese Patent Application Laid-Open No. 2000-72622 discloses an inorganic fine particle having an inorganic fine particle having an average particle size of 1/10 or less included and coated with an organic polymer compound such as polymethyl methacrylate as a medium. It is described that it has an excellent ultraviolet protection effect.

  However, the composite fine particles disclosed in the above-mentioned conventional examples tend to aggregate fine particles, and are insufficient in terms of touch when blended into cosmetics. Other fine particles, for example, spherical fine particles When the body was blended, the adhesiveness and spreadability were inferior, and the finished product lacked the covering power, and it was difficult to expect the unevenness concealing effect such as color unevenness such as dullness and pores and wrinkles.

  As a result of intensive studies to solve such conventional problems, the present inventor can not only effectively demonstrate the improvement effect on the skin by blending fine particles charged with static electricity. The inventors have found that a cosmetic material having a very good feeling of use can be obtained, and have completed the present invention.

  In order to achieve the above object, the invention according to claim 1 of the present invention is summarized in a cosmetic characterized by blending fine particles charged with static electricity.

  In the cosmetic according to claim 1, the fine particles are inorganic pigments and / or lipid membrane vesicles, and the amount of the fine particles is 0.0001 to 1% by weight.

  Since the cosmetic according to the present invention is configured as described above, fine particles negatively ionized by static electricity are uniformly dispersed to charge the cosmetic. And it significantly promotes the penetration and activation of the active ingredients in cosmetics into the skin, and the synergistic effect keeps the pH value, texture, dullness, moisture content, surface temperature of the skin appropriately, Not only can the improvement effect be exhibited effectively, but also a very good feeling of use is exhibited.

As fine particles in the present invention, fine powdery inorganic pigments and / or lipid membrane vesicles are used. And as a suitable example of the said inorganic pigment, titanium oxide, aluminum silicate, mica, sericite, talc, silica, kaolin, calcium carbonate, zinc oxide, aluminum oxide, magnesium oxide, zirconium oxide, magnesium silicate, sulfuric acid Examples thereof include barium, titanium-coated mica, boron nitride, bengara, yellow iron oxide, black iron oxide, ultramarine blue, and the like. The particle size is preferably 10 nm or more and 200 nm or less. Examples of suitable lipid membrane vesicles include phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylinositol, phosphatidylglycerol, soybean phospholipid, and egg yolk phospholipid. The particle size of such lipid membrane vesicles is preferably 10 nm to 200 nm.

  The fine particles are charged with static electricity by applying an electric field with a known static generator and ionized negatively. The absolute value of the zeta potential of such fine particles is preferably 15 to 500 mV.

  The zeta potential is also called zeta potential or electrokinetic potential, and means a potential difference generated at the interface between a solid and a liquid that are in contact with each other when they are in relative motion. Of the electric double layer that is used to study the surface state of a solid in a liquid and is generated at the interface between a fixed and a liquid, the portion close to the solid has a stationary phase (or adsorbed phase), and ions that have a charge opposite to that of the stationary surface. Etc. are stuck. Since the stationary phase moves together with the solid when the solid and the liquid move relative to each other, the potential difference that actually controls the motion is considered to be the potential difference between the surface of the stationary phase and the inside of the solution. The potential difference is called the zeta potential. The zeta potential takes a positive or negative value depending on whether the charge of the stationary phase is positive or negative. The zeta potential of the fine particles in the cosmetic composition can be measured by a general known method. For example, using LAZER ZEE METER MODEL 501 manufactured by Penchem, applying a constant electric field, The zeta potential can be obtained by measuring the moving speed.

  The fine particles charged with static electricity are blended in an amount of 0.0001 to 1% by weight, preferably 0.01 to 0.1% by weight, based on the cosmetic composition. When the amount of the fine particles is 0.0001% by weight or less, sufficient electrostatic charging is not exhibited, and when it exceeds 1% by weight, the cosmetic composition is unfavorably affected.

Examples of cosmetics in the present invention include lotions, essences, creams, emulsions, foundations, face wash, cleansing agents, packs, hair tonics, hair shampoos, hair conditioners, sunscreens, etc. I can list them. And as composition of this cosmetics, the mixing | blending of purified water is essential, and glycerol, 1,3 butylene glycol,
Polyhydric alcohols such as 1,2 pentanediol; Hydrocarbons such as liquid paraffin, petrolatum, squalane and vegetable squalane; Fats and oils such as orange, olive oil, macadamia nut oil and maltierella oil; Lauric acid , Higher fatty acids such as myristic acid, palmitic acid, stearic acid; esters such as cholesterol ester; higher alcohols such as cetanol; silicones; carboxyvinyl polymer, xanthan gum, hydroxyethyl cellulose Surfactant; Ethanol; Inorganic powder; Plant extract such as Hamameli extract; Anti-inflammatory agent such as Allantoin; Vitamins such as vitamin C; Stabilizer such as cyclodextrin and sodium chloride; Absorber; Preservative; PH adjuster such as L-alginic acid and potassium hydroxide; Dye; Bets can be appropriately allowed to blend in a range that does not impair the effect of the invention depending on the form of these cosmetics.

  An example of the present invention will be shown below, but the present invention is not limited to such an example.

Examples 1-3, Comparative Examples 1-3
Based on the blending ratio (% by weight) shown in Table 1, a lotion was prepared by a conventional method. And about Examples 1-3, it applied and electrified with the static electricity generator. Next, while measuring the zeta potential of the obtained lotion, it was continuously used for 1 week by a female panelist, and dull evaluation (forehead, lower jaw, right cheek, left cheek), texture evaluation (forehead, mouth) The lower jaw, right cheek, and left cheek) were performed based on the following criteria, and the skin surface temperature and the skin surface PH were measured. The results are also shown in Table 1. The above dull evaluation is
○: Dullness is markedly improved ×: No improvement in dullness is standard, and texture evaluation is
○ ：
×:
Based on.

  As is apparent from Table 1, Examples 1 to 3 are superior to Comparative Examples 1 to 3 in that they are excellent in terms of haze evaluation and texture evaluation, and maintain a suitable skin surface temperature and skin surface PH. It can be understood that the improvement effect on the skin is effectively exhibited.

Examples 4-6, Comparative Examples 4-6
Based on the blending ratio (% by weight) shown in Table 2, the cream was prepared by a conventional method. And about Examples 4-6, the static electricity generator applied and applied the static electricity. Next, for the obtained cream, its zeta potential was measured, and it was continuously used by a female panelist for 1 week. Dullness evaluation (forehead, lower jaw, right cheek, left cheek), texture evaluation (forehead, Mouth lower jaw, right cheek, left cheek) are performed based on the following criteria, and the skin surface temperature and skin surface PH are measured. The results are also shown in Table 2. The above dull evaluation is
○: Dullness is markedly improved ×: No improvement in dullness is standard, and texture evaluation is
○ ：
×:
Based on.

  As is apparent from Table 2, Examples 4 to 6 are superior to Comparative Examples 4 to 6 in terms of the haze evaluation and texture evaluation, and maintain a suitable skin surface temperature and skin surface PH. It can be understood that the improvement effect on the skin is effectively exhibited.

Examples 7-9, Comparative Examples 7-9
Based on the blending ratio (% by weight) shown in Table 3, the emulsion was prepared by a conventional method. And about Examples 7-9, the static electricity was applied and charged by the static electricity generator. Next, the zeta potential of the obtained emulsion was measured and continuously used for 1 week by a female panelist. Dullness evaluation (forehead, lower jaw, right cheek, left cheek), texture evaluation (forehead, lower jaw) , Right cheek, left cheek) based on the following criteria, skin surface temperature and skin surface PH were measured, and the results are also shown in Table 3. The above dull evaluation is
○: Dullness is markedly improved ×: No improvement in dullness is standard, and texture evaluation is
○ ：
×:
Based on.

  As is apparent from Table 3, Examples 7 to 9 are superior to Comparative Examples 7 to 9 in terms of the haze evaluation and texture evaluation, and maintain a suitable skin surface temperature and skin surface PH. It can be understood that the improvement effect on the skin is effectively exhibited.

Claims (3)

  A cosmetic comprising a mixture of fine particles charged with static electricity.   The cosmetic according to claim 1, wherein the fine particles are inorganic pigments and / or lipid membrane vesicles.   3. The cosmetic according to claim 1, wherein the amount of the fine particles is 0.0001 to 1% by weight.