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Porous, polymer beads and process of their preparation

  • US 5,288,763 A
  • Filed: 12/23/1992
  • Issued: 02/22/1994
  • Est. Priority Date: 12/23/1992
  • Status: Expired due to Fees
First Claim
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1. A method of preparing porous, functionalized polymer particles which comprises a cross-linked copolymer having microporous regions and macroporous regions in the polymer matrix thereof, wherein the functional groups are essentially present only within the macroporous regions, comprising the steps of:

  • (a) providing a polymerizable mixture containing a functional monomer, a cross-linker and a template polymer in an aqueous medium to form a suspension, the template polymer being capable of forming an ionic or covalent bond with the functional monomer;

    (b) copolymerizing the monomer and the cross-linker with or without a polymerization catalyst in the suspension to form a cross-linked copolymer;

    (c) removing the aqueous medium and the template polymer from the copolymer to recover porous, functionalized polymer particles, the particles having microporous regions and macroporous regions in the polymer matrix thereof, wherein the functional groups are essentially present only within the macroporous regions.

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