Ion exchange processes and products
AssigneeICI Australia Limited
InventorsBrian A. Bolto, David R. Dixon, Robert J. Eldridge
Life of this patent
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Abstract
Processes for making copolymers comprising treating a reaction mixture of a monomer and a substrate comprising ferromagnetic material located in a polymeric matrix so as to polymerize the monomer in a manner that it forms a polymeric shell grafted on to and surrounding the substrate, the polymerization of the monomer being initiated by adding the components of a redox system sequentially to the reaction mixture.
Claims12
A process for the manufacture of a copolymer which process comprises treating a reaction mixture comprising at least one functional monomer and particulate substrate material comprising ferromagnetic material located in a polymeric matrix so as to polymerize said monomer in a manner such that it forms a polymeric shell which is grafted on to and surrounds said substrate and wherein the polymerization of said monomer is initiated by first activating the said polymeric matrix component of the said substrate with an excess of aqueous hydrogen peroxide solution, washing the thus activated substrate with water to remove the excess hydrogen peroxide solution, forming an aqueous slurry of the activated substrate, and adding said monomer and a ferrous salt to the said aqueous slurry in such a manner as to cause the monomer to polymerise on to the activated polymer matrix to form the said copolymer.
Dependencies are inferred from the claim text.