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AssigneeShiseido Company, Ltd.
InventorsToshihiko Nakane, Masumi Koishi, Hiroshi Fukui, Yutaka Okunuki, Yoshio Yahata, Shigenori Kumagai, Hiroyuki Yokoyama, Eiichiro Yagi, Minoru Fukuda, Tadao Ohta, Fujihiro Kanda, Kazuhisa Ohno, Toshihide Ebisawa, Tomiyuki Nanba, Susumu Takada, Masato Hatao, Masaru Suetsugu, Toshihiro Tanaka, Osamu Moro
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A magnesium aluminometasilicate coated composite powder which comprises magnesium aluminometasilicate, or magnesium aluminometasilicate and at least one other powder coated on a surface of a core powder and which is usable in, for example, a skin treatment agent, decodorant, and oral composition.
A composite powder which comprises magnesium aluminometasilicate and optionally at least one other powder selected from the group consisting of organic powders of polyamide resin, polyolefin resin, polystyrene, polyester resin, acrylic resin, epoxy resin, fluorine type resin, silicone type resin, phenol resin, vinyl resin, vinylidene resin, polyurethane resin, natural rubber, synthetic rubber, chitin, chitosan, fibroin, keratin, and cellulose, and inorganic powders of talc, kaolin, mica, titanium dioxide, zinc white, zirconium oxide, anhydrous silicic acid, barium sulfate, iron oxide, mica, aluminum hydroxide chloride, calcium phosphate, and calcium secondary phosphate, coated on a surface of a core powder, said composite powder being produced by dry mixing the core powder and magnesium aluminometasilicate and the optional powder.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Insoles for insertion, e.g. footbeds or inlays, for attachment to the shoe after the upper has been joined: characterised by the material
Characterised by special physical form: encapsulated compositions
Containing inorganic ingredients: peroxides; Oxygen; Ozone
Containing inorganic ingredients: aluminium; Compounds thereof
Term ended 26 Jan 2010 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
1. Field of the Invention
The present invention relates to a magnesium aluminometasilicate coated composite powder wherein the surface of a core powder is substantially completely covered with a magnesium aluminometasilicate coating powder, thereby improving the surface characteristics, especially adsorpability, of the powder. More specifically, it relates to a magnesium aluminometasilicate coated composite powder and a skin treatment or external dermatological agent, deodorant, and oral composition using same, primarily to improve the adsorption property thereof.
Note that in this specification, "substantially completely covered" means a state wherein the core powder is homogeneously and closely covered by the coating powder. However, when microscopically examining the composite powder formed by substantially completely covering the core powder with the coating powder, it will be seen that there are extremely narrow gaps between the particles of the coating powder.
The present invention will be better understood from the description set forth below with reference to the accompanying FIG. 1, which is an electron microscope photograph (x 6000) showing the particulate structure of the magnesium aluminometasilicate coated composite powder obtained in Example 1 of the present invention.
As mentioned above, according to the present invention, the powder characteristics, typically the adsorption effect, can be improved to a great extent by coating the surface of a core powder with magnesium aluminometasilicate or magnesium aluminometasilicate and one or two or more kinds of other powders.
The constitution of the present invention is described in detail as follows.
As the core powder constituting the magnesium aluminometasilicate coated composite powder of the present invention, any desired organic or inorganic powder with an average particle size of 0.1 to 500 .mu.m can be used, and the form of core powder may be any of a spheroid, plate, granule, or needle.