US 5,668,236 AGranted

Hydrophilic highly swellable hydrogels

AssigneeCassella Aktiengesellschaft

InventorsFritz Engelhardt, Ulrich Riegel, Uwe Stuven, Helmut Klotzsche, Gustav Remmel

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Abstract

The present invention relates to a hydrophilic highly swellable hydrogel based on (co)polymerized hydrophilic monomers or based on graft (co)polymers, characterized in that it is post-crosslinked with a polyamidoamine in an aqueous medium.

Claims18

Dependent claims

A hydrophilic highly swellable hydrogel which comprises polymers prepared by (co)polymerized hydrophilic monomers or graft (co)polymers, that are post-crosslinked with a polyamidoamine in an aqueous medium.

Dependencies are inferred from the claim text.

Facts

Application: 08/639,510Filed 29 Apr 1996 · continuation
Priority: DE 44 08 435.812 Mar 1994
Granted: 16 Sep 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

C08F 8/30
Chemical modification by after-treatment: introducing nitrogen atoms or nitrogen-containing groups
A61L 15/20
Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons: containing organic materials
A61L 15/60
Use of materials characterised by their function or physical properties: liquid-swellable gel-forming materials, e.g. super-absorbents
Y10S 524/916
Synthetic resins or natural rubbers -- part of the class 520 series: hydrogel compositions

Family

Serial396,612Parent of this continuation · filed 1 Mar 1995
US 5,668,236 AThis patent

From the US filing history. Foreign family members aren’t listed.

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