EP 2193228 A2 20100609 - FILAMENT CONTAINING HYALURONIC ACID IN FREE ACIDIC FORM AND METHOD FOR MAKING SAME
Title (en)
FILAMENT CONTAINING HYALURONIC ACID IN FREE ACIDIC FORM AND METHOD FOR MAKING SAME
Title (de)
FASER MIT HYALURONSÄURE IN FREIER SAURER FORM UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
FILAMENT A BASE D'ACIDE HYALURONIQUE SOUS FORME ACIDE LIBRE ET SON PROCEDE D'OBTENTION
Publication
Application
Priority
- FR 2008051729 W 20080926
- FR 0757957 A 20070928
Abstract (en)
[origin: WO2009050389A2] The invention relates to a method for producing by wet spinning a continuous filament containing hyaluronic acid in the free acidic and particularly water-soluble form. The preparation method of the invention comprises the following steps: a) preparing an aqueous solution suitable for spinning of hyaluronic acid or a salt thereof, preferably a sodium hyaluronate solution; b) extruding said solution through an extrusion die; c) forming the filament by passing the extruded solution in a bath of concentrated acetic acid, particularly at more than 80%, followed by stretching and drying. The invention also relates to a filament containing hyaluronic acid in the free acidic form, wherein said filament has swelling properties in water and physiological liquids and can be solubilised in water under certain conditions.
IPC 8 full level
A61L 15/00 (2006.01); A61L 15/28 (2006.01); C08B 37/08 (2006.01); D01D 5/00 (2006.01); D01D 5/06 (2006.01); D01F 2/00 (2006.01); D01F 9/00 (2006.01); D01F 11/00 (2006.01); D01F 11/02 (2006.01)
CPC (source: EP US)
A61K 9/70 (2013.01 - US); A61K 47/36 (2013.01 - US); A61L 27/20 (2013.01 - US); A61P 31/04 (2017.12 - EP US); A61P 31/10 (2017.12 - EP); C08J 7/065 (2013.01 - US); D01D 5/06 (2013.01 - EP US); D01F 9/00 (2013.01 - EP US); D01F 11/00 (2013.01 - EP US); D06M 13/1845 (2013.01 - EP); D06M 15/03 (2013.01 - EP); D06M 15/15 (2013.01 - EP); D06M 15/227 (2013.01 - EP); C08J 2305/08 (2013.01 - US); D06M 16/00 (2013.01 - EP); D06M 2101/02 (2013.01 - EP); Y10T 428/2913 (2015.01 - EP US); Y10T 428/2933 (2015.01 - EP US); Y10T 428/298 (2015.01 - EP US)
Citation (search report)
See references of WO 2009050389A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
FR 2921675 A1 20090403; FR 2921675 B1 20100319; BR PI0817567 A2 20150407; BR PI0817567 B1 20180724; EP 2193228 A2 20100609; US 2010310631 A1 20101209; US 2014242146 A1 20140828; US 8753671 B2 20140617; US 9044410 B2 20150602; WO 2009050389 A2 20090423; WO 2009050389 A3 20091126
DOCDB simple family (application)
FR 0757957 A 20070928; BR PI0817567 A 20080926; EP 08839182 A 20080926; FR 2008051729 W 20080926; US 201414269315 A 20140505; US 68025708 A 20080926