Method for preparing surface-imprinted polymer microspheres...

Details Method for preparing surface-imprinted polymer microspheres... Method for preparing surface-imprinted polymer microspheres...

2011-01-25

2011-01-25

Yoon, Tae H (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S202000, C523S203000, C524S297000, C528S480000

Reexamination Certificate

active

07875662

ABSTRACT:
A method of preparing surface-imprinted microspheres having a core-shell form for selective separation of heavy metal ions, includes reacting a metal salt of a heavy metal with a monomer having at least one group that reacts with the metal salt under conditions effective to prepare a metal ion-containing monomer; mixing the metal ion-containing monomer with a cross-linker monomer and a polymerization initiator in a solvent to provide a mixture; subjecting styrene to dispersion polymerization to provide polystyrene beads that serve as a core; causing absorption of dibutyl phthalate onto the polystyrene beads to provide dibutyl phthalate-containing polystyrene beads; adding the mixture to the dibutyl phthalate-containing polystyrene beads, causing absorption of the metal ion-containing monomer onto the dibutyl phthalate-containing polystyrene beads, and causing polymerization of the absorbed monomer with the cross-linker monomer to provide the surface-imprinted microspheres; and causing removal of the metal ions to provide imprinted sites.

REFERENCES:
patent: 6780323 (2004-08-01), Murray
patent: 6881804 (2005-04-01), Sellergren et al.
patent: 2003/0186328 (2003-10-01), Carter et al.
patent: 2005-320422 (2005-11-01), None
patent: 2006-138656 (2006-06-01), None

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