US 2006/0154067 A1Published application

Porous beads and method of production thereof

AssigneeConopco, Inc.

InventorsAndrew Cooper, Haifei Zhang

Life of this patent

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Abstract

The present invention relates to porous beads and to methods of production thereof, in particular to a method of producing hydrophilic polymeric beads by freeze-drying a droplet containing a polymeric material in a continuous phase of an oil-in-water (O/W) emulsion.

Claims21

Dependent claims

A hydrophilic porous polymeric bead comprising a three dimensional open-cell lattice of a water-soluble polymeric material, the lattice having a porous structure providing in the bead an intrusion volume of at least about 3 ml/g.

Dependencies are inferred from the claim text.

Facts

Application: 10/522,485Filed 29 Jul 2003
Priority: GB 0217587.530 Jul 2002
Published: 13 Jul 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

C08J 9/16
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof: making expandable particles
C08J 9/28
Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof: by elimination of a liquid phase…
C08J 2201/048
Characterised by the elimination of a liquid or solid component, e.g. precipitation, leaching out, evaporation: elimination of a frozen liquid phase
C08J 2300/14
Characterised by the use of unspecified polymers: water soluble or water swellable polymers, e.g. aqueous gels

Family

US 7,153,572 B2Related patent
US 2006/0154067 A1This patent

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

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