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US 5,047,438 AGranted
Porous rigid resins and process of preparation
AssigneeSupelco, Inc.
InventorsBinyamin Feibush, Nai-Hong Li
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AssigneeSupelco, Inc.
InventorsBinyamin Feibush, Nai-Hong Li
Estimating the term…
Porous, rigid resin particles are prepared having a predetermined particle size distribution, surface area and porosity by polymerizing in the pores of porous inorganic template particles a reaction mixture comprising monovinyl monomers, polyvinyl crosslinking monomers and a polymerization initiator in a liquid medium in which the monomers and initiator are phase separable and extractable therefrom into the pores of the template particles. The extracted mixture is polymerized in the pores of the template particles, and the template particles are removed without destruction of the polymerizate. The isolated polymerizate mirrors the characteristics of the template particles. The surface of the polymerizate may be modified in various ways to contain desired functionality. The particles of the invention are useful in chromatography, adsorption, ion exchange, and in catalysis.
A process for preparing porous, rigid resin particles which comprises (a) contacting porous inorganic template particles with a reaction mixture comprising monoethylenically unsaturated monomers, polyethylenically unsaturated monomers and a polymerization initiator in a liquid medium, the volume of the reaction mixture being approximately equal to the pore volume of the inorganic particles, said monomers and initiator being phase separable from the reaction medium and extractable into the pores of the inorganic particles, (b) polymerizing the monomers in the pores of the template particles to form crosslinked copolymers, and (c) removing the inorganic particles from the copolymer, whereby the isolated copolymer particles mirror the size, surface area and porosity of the template particles.
Dependencies are inferred from the claim text.