EP 1507809 A1 20050223 - METHOD FOR PRODUCING LOW-ODOR HYDROGEL-FORMING POLYMERS
Title (en)
METHOD FOR PRODUCING LOW-ODOR HYDROGEL-FORMING POLYMERS
Title (de)
VERFAHREN ZUR HERSTELLUNG GERUCHSARMER HYDROGEL-BILDENDER POLYMERISATE
Title (fr)
PROCEDE DE PRODUCTION DE POLYMERISATS HYDROGELIANTS A ODEUR PEU MARQUEE
Publication
Application
Priority
- DE 10221176 A 20020513
- EP 0304945 W 20030512
Abstract (en)
[origin: WO03095510A1] The invention relates to a method for producing a low-odor hydrogel-forming polymer based on acrylic acid, comprising the following steps: a) producing a polymeric hydrogel by radically polymerizing, in an aqueous polymerization medium, a monomer composition containing at least 50 wt. % of acrylic acid, and transforming the hydrogel into a particulate hydrogel or into a hydrogel-forming powder, and optionally; b) treating the particulate hydrogel or the hydrogel-forming powder with a crosslinking-active substance having at least two functional groups that react with the carboxyl groups of the polymer. The invention is characterized in that acrylic acid used in step a) contains less than 400 ppm ethanoic acid and/or propionic acid. The invention also relates to the hydrogel-forming polymers obtained according to said method, and to the use thereof.
IPC 1-7
IPC 8 full level
A61F 13/53 (2006.01); A61F 13/49 (2006.01); A61L 15/60 (2006.01); C08F 2/00 (2006.01); C08F 8/00 (2006.01); C08F 20/06 (2006.01); C08F 220/06 (2006.01)
CPC (source: EP US)
C08F 20/06 (2013.01 - EP US)
Citation (search report)
See references of WO 03095510A1
Citation (examination)
- EP 0942014 A2 19990915 - NIPPON CATALYTIC CHEM IND [JP]
- WO 0138402 A1 20010531 - BASF AG [DE], et al
- US 5504247 A 19960402 - SAXER KURT [CH], et al
- WO 9801415 A1 19980115 - BASF AG [DE], et al
- DE 10003497 A1 20010412 - BASF AG [DE]
- US 5817865 A 19981006 - MACHHAMMER OTTO [DE], et al
Citation (third parties)
Third party :
- EP 0942014 A2 19990915 - NIPPON CATALYTIC CHEM IND [JP]
- WO 0138402 A1 20010531 - BASF AG [DE], et al
- US 5504247 A 19960402 - SAXER KURT [CH], et al
- WO 9801415 A1 19980115 - BASF AG [DE], et al
- DE 10003497 A1 20010412 - BASF AG [DE]
- US 5817865 A 19981006 - MACHHAMMER OTTO [DE], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 03095510 A1 20031120; AU 2003240228 A1 20031111; BR 0310012 A 20050215; CN 1653094 A 20050810; DE 10221176 A1 20031127; EP 1507809 A1 20050223; JP 2005525445 A 20050825; US 2005209411 A1 20050922; US 7307132 B2 20071211
DOCDB simple family (application)
EP 0304945 W 20030512; AU 2003240228 A 20030512; BR 0310012 A 20030512; CN 03810865 A 20030512; DE 10221176 A 20020513; EP 03732349 A 20030512; JP 2004503521 A 20030512; US 51160304 A 20041103