EP 2291416 A1 20110309 - METHOD FOR CONTINUOUSLY PRODUCING WATER-ABSORBING POLYMER PARTICLES
Title (en)
METHOD FOR CONTINUOUSLY PRODUCING WATER-ABSORBING POLYMER PARTICLES
Title (de)
VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG WASSERABSORBIERENDER POLYMERPARTIKEL
Title (fr)
PROCÉDÉ DE PRÉPARATION EN CONTINU DE PARTICULES POLYMÈRES ABSORBANT L'EAU
Publication
Application
Priority
- EP 2009057143 W 20090610
- US 7391408 P 20080619
Abstract (en)
[origin: US2009318633A1] A process for continuously producing water-absorbing polymer particles, comprising polymerization, drying, grinding, classification and at least partial recycling of the undersize obtained in the classification, wherein the polymer gel obtained by the polymerization is withdrawn from the polymerization reactor and mixed with the recycled undersize.
IPC 8 full level
A61L 15/24 (2006.01); A61L 15/60 (2006.01); B07B 1/00 (2006.01); C08F 6/00 (2006.01); C08J 3/12 (2006.01); C08J 11/00 (2006.01); F26B 1/00 (2006.01); C08L 33/02 (2006.01)
CPC (source: EP US)
A61L 15/24 (2013.01 - EP US); C08F 6/008 (2013.01 - EP US); C08J 3/12 (2013.01 - EP US); C08J 2300/14 (2013.01 - EP US)
Citation (search report)
See references of WO 2009153196A1
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 MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
US 2009318633 A1 20091224; US 8080620 B2 20111220; CN 102066431 A 20110518; CN 102066431 B 20121003; EP 2291416 A1 20110309; JP 2011524452 A 20110901; WO 2009153196 A1 20091223
DOCDB simple family (application)
US 48648309 A 20090617; CN 200980123232 A 20090610; EP 09765776 A 20090610; EP 2009057143 W 20090610; JP 2011513993 A 20090610