EP 1237988 A1 20020911 - METHOD FOR PRODUCING NANOPARTICULATE CHITOSANS OR CHITOSAN DERIVATIVES
Title (en)
METHOD FOR PRODUCING NANOPARTICULATE CHITOSANS OR CHITOSAN DERIVATIVES
Title (de)
VERFAHREN ZUR HERSTELLUNG VON NANOPARTIKULÄREN CHITOSANEN ODER CHITOSAN-DERIVATEN
Title (fr)
PROCEDE DE PREPARATION DE CHITOSANES OU DE DERIVES DE CHITOSANE NANOPARTICULAIRES
Publication
Application
Priority
- DE 19952073 A 19991029
- EP 0010330 W 20001020
Abstract (en)
[origin: WO0132751A1] The invention relates to a method for producing nanoparticulate chitosans or chitosan derivatives with particle diameters in the range of from 10 to 1000 nm. According to the inventive method, (a) the chitosan or chitosan derivative is dissolved in an acidic aqueous medium and (b) the pH of the solution is raised in the presence of a surface modifier to such an extent that the chitosan is precipitated. The invention allows for the production of non-agglomerating nanoparticles in dispersed or dry form in a simple manner and independent of organic solvents.
IPC 1-7
IPC 8 full level
A61K 8/04 (2006.01); A61K 8/72 (2006.01); A61K 8/73 (2006.01); A61K 9/00 (2006.01); A61K 47/36 (2006.01); A61Q 19/00 (2006.01); B82B 3/00 (2006.01); C08B 37/08 (2006.01); C08J 3/14 (2006.01); C08L 5/08 (2006.01); A61K 9/51 (2006.01)
CPC (source: EP)
A61K 8/0241 (2013.01); A61K 8/736 (2013.01); A61K 9/0014 (2013.01); A61K 9/5161 (2013.01); A61K 9/5192 (2013.01); A61Q 19/00 (2013.01); B82Y 5/00 (2013.01); C08B 37/003 (2013.01); C08J 3/14 (2013.01); C08L 5/08 (2013.01); A61K 47/36 (2013.01); A61K 2800/413 (2013.01); C08J 2305/08 (2013.01)
Citation (search report)
See references of WO 0132751A1
Designated contracting state (EPC)
AT BE CH CY DE ES FR GB IT LI
DOCDB simple family (publication)
WO 0132751 A1 20010510; DE 19952073 A1 20010712; EP 1237988 A1 20020911; JP 2003514046 A 20030415
DOCDB simple family (application)
EP 0010330 W 20001020; DE 19952073 A 19991029; EP 00972819 A 20001020; JP 2001535447 A 20001020