EP 1056788 A1 20001206 - CROSS-LINKING OF HYDROGELS WITH PHOSPHORIC ACID ESTERS
Title (en)
CROSS-LINKING OF HYDROGELS WITH PHOSPHORIC ACID ESTERS
Title (de)
VERNETZUNG VON HYDROGELEN MIT PHOSPHORSÄUREESTERN
Title (fr)
RETICULATION D'HYDROGELS AVEC DES ESTERS PHOSPHORIQUES
Publication
Application
Priority
- DE 19807500 A 19980221
- EP 9901086 W 19990219
Abstract (en)
[origin: DE19807500C1] Surface cure of water-absorbing polymers comprises treating the polymers with a surface curing solution comprising crosslinking agents comprising phosphoric esters and curing and drying by heating during or after treatment. Surface cure of water-absorbing polymers comprises treating the polymers with a surface curing solution comprising crosslinking agents and curing and drying by heating during or after treatment. The crosslinking agent comprises mono(hydroxy- or amino-alkyl) or cyclic phosphoric ester(s) (I) of formula (IA) or (IB), dissolved in an inert solvent; X = hydroxyl (OH) or amino (NH2); R = 1-12C alkylene. An Independent claim is also included for water-absorbing polymers produced in this way.
IPC 1-7
IPC 8 full level
A61L 15/00 (2006.01); A61L 15/60 (2006.01); C08F 8/40 (2006.01); C08J 3/24 (2006.01); D06M 15/263 (2006.01)
CPC (source: EP)
A61L 15/60 (2013.01); C08F 8/40 (2013.01); C08J 3/245 (2013.01); D06M 15/263 (2013.01); C08J 2300/14 (2013.01)
Citation (search report)
See references of WO 9942495A1
Designated contracting state (EPC)
BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
DE 19807500 C1 19990729; CA 2319457 A1 19990826; EP 1056788 A1 20001206; JP 2002504567 A 20020212; WO 9942495 A1 19990826
DOCDB simple family (application)
DE 19807500 A 19980221; CA 2319457 A 19990219; EP 9901086 W 19990219; EP 99911687 A 19990219; JP 2000532447 A 19990219