Polymer beads and method for preparation thereof

• US 6,171,489 B1
• Filed: 04/12/1999
• Issued: 01/09/2001
• Est. Priority Date: 09/09/1994
• Status: Expired due to Term

• Current Assignee: Ixom Operations Pty Ltd.
• Original Assignee: ICI Australia Operations Proprietary Limited, Industrial Research Organisation
• Inventors: Ballard, Mathew John, Bates, James Sydney, Eldridge, Robert James
• Primary Examiner(s): Reifsnyder, David A.
• Application Number:
  US09/289,057
• Time in Patent Office: 638 Days
• Field of Search: 210/222, 210/502.1, 210/504, 210/506, 210/510.1, 252/62.51 R, 252/62.34, 252/62.56, 428/900
• US Class Current: 210/222
• CPC Class Codes: C08F 2/44 Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
• CPC Class Codes: Y10S 428/90 Magnetic feature
• CPC Class Codes: Y10T 428/2907 with coating or impregnation

Abstract

The present invention relates to a process for producing polymer beads incorporating solid particles and to the novel polymer beads per se. The invention provides a process for producing polymer beads incorporating solid particulate material, which process comprises producing a dispersion having a dispersed phase including one or more monomers also including solid particulate material, and causing said one or more monomers to undergo a polymerisation reaction to form said polymer beads, wherein said dispersion further includes a solid phase dispersing agent for dispersing solid particles of material in the dispersed phase and wherein said solid phase dispersing agent reacts with at least one monomer to thereby become chemically incorporated in said polymer. The polymer beads comprise a polymer matrix having solid particulate material dispersed substantially uniformly therein and wherein the polymer matrix incorporates a solid phase dispersing agent chemically reacted into the polymeric matrix.

Claims

1. Polymer beads selected from the group consisting of ion exchange resins, macroporous beads and combinations thereof, said beads comprising a polymer matrix having solid particulate material dispersed substantially uniformly therein and wherein the polymer matrix incorporates a solid phase dispersing agent chemically reacted into the polymeric matrix.

2. Polymer beads according to claim 1 wherein said polymer beads are in the range of from 30 μ

m to 1000 μ

m.

3. Polymer beads according to claim 1 wherein the solid particulate material is a magnetic material.

4. Polymer beads selected from the group consisting of ion exchange resins, macroporous beads and combinations thereof, said beads comprising a polymeric matrix having solid particulate material dispersed therein, wherein the polymeric matrix incorporates a solid phase dispersing agent which is chemically reacted into the polymeric matrix and wherein the polymer beads incorporate a toughening agent.

5. Polymer beads according to claim 4 wherein said polymer beads are in the range of from 30 μ

m to 1000 μ

m.

6. Polymer beads according to claim 4 wherein the solid particulate material is a magnetic material.