Global Patent Index - EP 1056788 A1

EP 1056788 A1 2000-12-06 - 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

EP 1056788 A1 (DE)

Application

EP 99911687 A

Priority

  • DE 19807500 A
  • EP 9901086 W

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 (main, further and additional classification)

C08F 8/40; A61L 15/00

IPC 8 full level (invention and additional information)

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 (invention and additional information)

C08J 3/245 (2013.01); A61L 15/60 (2013.01); C08F 8/40 (2013.01); D06M 15/263 (2013.01); C08J 2300/14 (2013.01)

Combination set (CPC)

A61L 15/60 + A61L 15/20

Citation (search report)

See references of WO 9942495A1

Designated contracting state (EPC)

BE DE ES FR GB IT NL SE

EPO simple patent family

DE 19807500 C1 19990729; CA 2319457 A1 19990826; EP 1056788 A1 20001206; JP 2002504567 A 20020212; WO 9942495 A1 19990826

INPADOC legal status


2002-04-10 [18W] WITHDRAWN

- Date of withdrawal: 20020214

2000-12-06 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000706

2000-12-06 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): BE DE ES FR GB IT NL SE