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Title:
SOLUTION OF CARBOXY-POLYSACCHARIDE
Document Type and Number:
Japanese Patent JP2010163485
Kind Code:
A
Abstract:

To provide an organic solvent solution of carboxy-polysaccharides, metal salts thereof or derivatives thereof, and to provide a preparation method of such an organic solvent solution.

The solution of carboxy-polysaccharides, metal salts thereof or derivatives thereof comprises carboxy-polysaccharides, metal salts thereof or derivatives thereof dissolved in a mixed solvent of dimethyl sulfoxide and an acid compound having a pKa of 4 or lower. The method for obtaining the solution of carboxy-polysaccharides, metal salts thereof or derivatives thereof comprises dispersing carboxy-polysaccharides, metal salts thereof or derivatives thereof in dimethyl sulfoxide and adding thereto the acid compound in an amount such that protons of the acid compound is 0.1-10.0 molar equivalent based on 1.0 molar equivalent of a carboxy group.

COPYRIGHT: (C)2010,JPO&INPIT


Inventors:
KANEKO HIROAKI
Application Number:
JP2009004627A
Publication Date:
July 29, 2010
Filing Date:
January 13, 2009
Export Citation:
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Assignee:
TEIJIN LTD
International Classes:
C08B11/12; C08B37/08
Domestic Patent References:
JP2002519481A2002-07-02
JP2000178304A2000-06-27
JP5054301A
JP2008179667A2008-08-07
JP2001510207A2001-07-31
JP2008527056A2008-07-24
JPS6264802A1987-03-23
JP2012507615A2012-03-29
Foreign References:
WO2007114482A12007-10-11
Other References:
JPN6013043627; Journal of Pharmacy and Pharmacology Vol.23, No.S1, p.252S (1971).
Attorney, Agent or Firm:
Hideko Mihara