JP3400213B2 - Pack fee - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pack material which has an excellent effect of removing keratin plugs and aged keratin of the skin, and has an excellent practical feeling (such as a refreshing feeling). More specifically, the present invention relates to a pack material in which a rod-like titanium oxide or a fine metal oxide is blended to adsorb these powders on the skin surface to enhance the effect of removing keratin plugs and aged keratin. 2. Description of the Related Art The present inventors have disclosed in Japanese Patent Application Publication No. 94-448 and Japanese Patent Application No. 6-204270 a technique of blending a rod-like powder such as a titanium oxide rod into a cosmetic. Above all, rod-shaped titanium oxide is excellent in lasting properties, and thus has high utility value in makeup products such as eyeshadow. It is generally well known that the particulate metal oxide has high adhesion to the skin. However, these powders are generally used in make-up cosmetics, and their properties when blended in packs, which are basic cosmetics, were not clear. [0003] Packs as one of the skin cosmetics are intended to promote skin blood circulation and cleanse the skin. , Wax type and peel-off type are usually used. However, the conventional packing material was not sufficiently effective in removing dirt from the skin surface, and in particular, was inferior in the ability to remove keratin plugs in which sebum and keratin were solidified in the hair follicle. That is, an object of the present invention is to develop a pack material having excellent keratotic plug removal ability. [0004] In order to achieve the above object, the pack fee of the present invention has the following structure. (A) The major axis is 1 to 10 μm and the minor axis is 0.01 to 1
rod-shaped titanium oxide is in the range of [mu] m, and (B) having an average primary particle size of fine titanium oxide in the range of 5~100nm
Pack fee der blended with down and / or particulates silicic anhydride
The amount of the component (A) is 0.0
5 to 3 parts by weight, 0.5 to 20 parts by weight of the component (B)
It is a pack charge characterized by being blended in . The inventors of the present invention have conducted intensive studies on the introduction of these powders into the packing material and the understanding of the characteristics of the packing material. As a result, these powders have a tendency to be adsorbed on keratin plugs and aged keratin. It was found to be very good at removing corn plugs. For example, when a pack of the present invention containing fine-particle titanium oxide is used and the cut surface of the plug at the site where keratin plugs or aged keratin is adsorbed is evaluated using an electron beam microanalyzer, A high concentration of titanium can be observed around the aged keratin. On the other hand, in the case of a pack material with a film formed on a glass plate,
There is a characteristic that such a state is not observed. [0007] Then, when the concentration of these powders was compared with the effect of removing the plug, a correlation was found between the powder concentration and the removal effect. That is, the present invention relates to a technique for improving the performance of a pack material by utilizing the adsorptivity of these powders to the skin. Embodiments of the present invention will be described below in detail. As a method for measuring the particle diameter of the rod-shaped titanium oxide and the fine metal oxide used in the present invention, a method obtained by observation with an electron microscope is used. The rod-shaped titanium oxide used in the present invention needs to have a long diameter of 1 to 10 μm which has a high range of adsorptivity to the skin. The minor axis is 0.01 to 1 (because the smaller the minor axis, the higher the adsorptivity to the skin).
μm, more preferably 0.01 to 0.5 μm
m. The metal oxide used in the present invention needs to have an average primary particle diameter of 5 to 100 nm within a range having a high adsorptivity to the skin. The types of metal oxides used in the present invention include titanium oxide, zinc oxide, iron oxide, iron hydroxide, silicic anhydride, aluminum oxide, zirconium oxide,
Examples thereof include low-order titanium oxide, iron-doped titanium oxide, and cerium oxide, and titanium oxide and silicic anhydride are particularly preferable. The shape is not limited as long as it is within the range of the particle diameter of the present invention. The rod-shaped titanium oxide and the metal oxide used in the present invention may be untreated, aluminum oxide,
An inorganic surface treatment such as silicon dioxide or a hydrophilic surface treatment using a hydrophilic compound such as polyacrylic acid may be performed. The surface may be treated with silicone, N-acylated lysine, a metal soap, an oil agent, a fluorine compound, or the like. However, in consideration of the stability of the preparation, an untreated or hydrophilic surface treatment is preferable. However, in this case, the stability of the system may be impaired depending on the zeta potential of the powder. Therefore, it is preferable to control the surface treatment within a range in which coagulation and sedimentation does not occur. The amount of the titanium oxide rod and the metal oxide to be used in the present invention is preferably 0.1 to 100 parts by weight of the pack material, which has a high adsorptivity to the skin and a high keratotic plug removing effect. It is preferably from 0.5 to 3 parts by weight and from 0.5 to 20 parts by weight. The form of the pack charge of the present invention is preferably a peel-off type in order to achieve the object of the present invention. As the film-forming agent in the packing material of the present invention, polyvinyl alcohol, polyvinylpyrrolidone, alginate, and conventional packing materials such as a polyvinyl alcohol / acrylic acid copolymer partially using these materials are used. A polymer which has been used can be used. In the packing material of the present invention, in addition to the above-mentioned components, powders, oils, resins and the like conventionally known in cosmetics are used.
Surfactants, ultraviolet absorbers, fragrances, preservatives, bactericides, humectants, adhesives, physiologically active ingredients, solvents, water and the like can be simultaneously added. Particularly for powders, silicone, acrylic, urethane, nylon, polystyrene, Teflon,
It is possible to mix resin powders such as polyethylene, polypropylene and methacrylic resin. The present invention will be described below in detail with reference to examples and comparative examples. The evaluation of the cosmetics used in the examples and comparative examples was conducted by asking the panelists of a total of 40 women to use the pack materials prepared in the examples and comparative examples on the left and right sides of the nose, and then drying and peeling. UV light is applied to the surface of the pack
The image was input to a CCD camera and evaluated by counting the number of horn plugs using an image processing device. This method utilizes the fact that the plug emits yellow light under ultraviolet rays. In addition, the evaluation was performed using the value obtained by dividing the total score of all panelists by the number of people according to the criteria shown in Table 1. Therefore,
The higher the value, the better the keratotic plug removal effect. Along with the above evaluation, a questionnaire was given to the panelists on the touch surface. Table 4 shows representative results of classification.
Shown in The numbers in Table 4 indicate the percentage (%) of panelists who answered "Yes" to the question items. [Table 1] Example 1 A peel-off type pack was prepared according to the formulation shown in Table 2. In addition, the compounding amount is weight%. [Table 2] After gradually dissolving the polyvinyl alcohol in purified water under heating at 80 ° C., each component was charged with stirring. Then, the mixture was pulverized for 5 minutes at 900 rpm using a wet pulverizer Micros (manufactured by Nara Machinery Co., Ltd.), and degassed.
The product was filled in a tube. Comparative Example 1 A product was obtained in the same manner as in Example 1, except that purified water was used instead of the fine particle titanium oxide, rod-shaped titanium oxide, and silicone crosslinked powder. Comparative Example 2 A product was obtained in the same manner as in Example 1 except that the silica-treated titanium oxide having an average primary particle diameter of 0.24 μm was used instead of the fine particle titanium oxide and the rod-shaped titanium oxide. Comparative Example 3 A product was obtained in the same manner as in Example 1 except that the rod-shaped titanium oxide used in Example 1 was used instead of the fine particle titanium oxide. Comparative Example 4 A product was obtained in the same manner as in Example 1, except that purified water was used instead of the rod-shaped titanium oxide. Comparative Example 5 A product was obtained in the same manner as in Example 1, except that silica-treated titanium oxide having an average primary particle diameter of 0.24 μm was used instead of the finely divided titanium oxide. Table 3 shows that Example 1 and Comparative Examples 1 to 5
The evaluation result of the keratotic plug removal effect is shown. Table 4 shows the results of the questionnaire on the touch surface. [Table 3] [Table 4] From the comparison between Example 1 in Table 3 and Comparative Example, it can be seen that the Example of the present invention has an excellent keratotic plug removal effect as compared with Comparative Example. Further, from the results in Table 4, it can be seen that the example feels a slight pain that does not cause pain, but also has a refreshing feeling. Furthermore, the blood circulation promoting effect of the skin was also sufficient. Comparative Example 1 was a case where the powder component was removed, but had a poor keratotic plug removing effect. Comparative Example 2 was a case where pigment-grade titanium oxide was used instead of the fine particle titanium oxide and the rod-shaped titanium oxide. Comparative Example 3 did not use fine particle titanium oxide,
In this example, only the rod-shaped titanium oxide was added in a large amount, but the keratotic plug removing effect and the feeling of use were inferior. Comparative Example 4 was an example in which only the fine particle titanium oxide was blended, but had a slightly inferior effect on the keratotic plug removal effect and practical feeling (feeling pain to the skin when peeled off) as compared with the examples. Comparative Example 5
In the case where the fine particle titanium oxide was removed, the keratotic plug removing effect and the feeling in use were inferior. From the above, it is apparent that the present invention provides a pack material having an excellent effect of removing keratotic plugs and aged keratin and an excellent practical feeling (such as a refreshing feeling). is there.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-60-67404 (JP, A) JP-A-57-112314 (JP, A) JP-A-57-56408 (JP, A) JP-A-8-48614 (JP, A) JP-A-8-48613 (JP, A) JP-A-5-286842 (JP, A) JP-A-5-97627 (JP, A) JP-A-7-187983 (JP, A) JP-A-8-169809 (JP, A) JP-A-7-277915 (JP, A) JP-A-4-360834 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A61K ^7/ 00-7/50 CA (STN) REGISTRY (STN)

Claims (1)

(57) [Claims 1] (A) The major axis is 1 to 10 μm and the minor axis is 0.1 μm.
Rod- shaped titanium oxide in the range of 01 to 1 μm , and
(B) Fine particles having an average primary particle diameter in the range of 5 to 100 nm;
A pack material containing particulate titanium oxide and / or fine particle silicic acid anhydride, and per 100 parts by weight of a back material (A)
Component is 0.05 to 3 parts by weight, component (B) is 0.5 to 20 parts by weight.
A pack charge characterized by being formulated at a concentration of parts by weight.