Title:
【発明の名称】キトサン縮合生成物、その製造及び使用
Document Type and Number:
Japanese Patent JP2003523459
Kind Code:
A
Abstract:
A condensation product of chitosan is formed by its reaction with a bisulfite addition compound HOCRR'SO3A wherein: each of R and R' independently represents a hydrogen atom, or R represents a hydrogen atom and R' represents an optionally substituted linear or branched saturated or unsaturated hydrocarbon group having up to 10 carbon atoms or an optionally substituted alicyclic, aromatic carbocyclic or heterocyclic ring, or R represents a CH3 group and R' represents an optionally substituted primary alkyl group, or R and R' together represent an optionally substituted alicyclic or heterocyclic ring, and A represents an alkali metal or ammonium ion. The condensation product/polymer is an anionic polyelectrolyte and forms stable anionic solutions in water at neutral pH. Such solutions may be mixed with other water soluble anionic polyelectrolyte, especially sodium alginate, to form very intimate admixtures or blends from which films, fibers, powders, sponges, gels and foams may be prepared. The chitosan may be regenerated from the condensation product in those films, fibers, powders, sponges, gels and foams by acid or alkali treatment during or subsequent to their production. The solubility of the condensation product also opens the way to a novel method for the extraction of chitosan from chitin/calcium carbonate mixtures.
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Inventors:
Roberts, George Andrew Francis
Application Number:
JP2001561067A
Publication Date:
August 05, 2003
Filing Date:
January 25, 2001
Export Citation:
Assignee:
BTG International Limited
International Classes:
A61F13/00; A61K47/36; A61K47/38; A61L15/64; A61L26/00; A61L27/00; A61L33/00; C08B5/14; C08B11/12; C08B37/04; C08B37/08; C08B37/10; C08J5/18; C08L5/08; D01F9/00; A61K9/70; (IPC1-7): C08B37/08; A61F13/00; A61K9/70; A61K47/36; A61K47/38; A61L15/64; A61L26/00; A61L27/00; A61L33/00; C08B5/14; C08B11/12; C08B37/04; C08B37/10; C08J5/18
Attorney, Agent or Firm:
Kazuo Shamoto (5 outside)