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Title:
METHOD FOR PRODUCING WATER-INSOLUBLE POWDER DISPERSION, WATER-INSOLUBLE POWDER DISPERSION, AND FILM-LIKE MOULDED BODY
Document Type and Number:
WIPO Patent Application WO/2018/043532
Kind Code:
A1
Abstract:
Provided is a method for producing a water-insoluble powder dispersion which maintains the inherent properties of a polyanionic polysaccharide used as a starting material thereof, exhibits high safety due to not needing a chemical crosslinking agent to be used during the production thereof, and is useful as a base material for medical and cosmetic materials or the like which can indwell evenly in an affected site. The method for producing the water-insoluble powder dispersion is provided with: a step in which a starting material powder comprising a water-soluble salt of a polyanionic polysaccharide is treated with a treatment liquid including an acid anhydride, to make the starting material powder water-insoluble and obtain a water-insoluble powder; and a step in which the water-insoluble powder is ground to an average particle size of 80 µm or lower, and dispersed in an aqueous solvent to obtain the water-insoluble powder dispersion.

Inventors:
ISONO Yasuyuki (LTD. 7-6 Nihonbashi Bakuro-cho 1-chome, Chuo-k, Tokyo 83, 〒1038383, JP)
NOISHIKI Yasuharu (#1103, 1-6 Namiki 2-chome, Kanazawa-ku, Yokohama-sh, Kanagawa 05, 〒2360005, JP)
Application Number:
JP2017/031078
Publication Date:
March 08, 2018
Filing Date:
August 30, 2017
Export Citation:
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Assignee:
DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD. (7-6 Nihonbashi Bakuro-cho 1-chome, Chuo-ku Tokyo, 83, 〒1038383, JP)
International Classes:
C08B37/08; A61K8/34; A61K8/73; A61Q19/00; C08B13/00; C08B37/04
Attorney, Agent or Firm:
KONDO Rieko et al. (Mitobe Building, 5th Floor 1-13-1, Kandaizumi-cho, Chiyoda-k, Tokyo 24, 〒1010024, JP)
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