Polysulfone copolymer membranes and process
AssigneeMillipore Corporation
InventorsJohn Charkoudian, Anthony E. Allegrezza, Jr.
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Abstract
A porous membrane, such as a microporous or ultrafiltration membrane, is formed from a solution of a polysulfone and a free radical polymerizable monomer exposed to ultraviolet light to form a blend of the polysulfone and copolymers of polysulfone activation products and polymerized monomer having polymer segments covalently bonded to each other. The solution is separated into two phases including a porous solid phase comprising the membrane.
Claims16
A porous membrane which is formed of a blend throughout its solid bulk matrix consisting essentially of (a) a sulfone polymer and (b) a copolymer of (1) polymeric subunits derived from said sulfone polymer and (2) a polymerized monomer composition, said copolymer formed from polymeric subunits free radical initiated polymerization of said monomer composition resulting in a covalent bond between said polymeric subunits and polymerized units of said monomer.
A porous membrane which is water wettable after being dried and which is formed of a blend throughout its solid bulk matrix consisting essentially of (a) a sulfone polymer and (b) a copolymer of (1) polymeric subunits derived from said sulfone polymer and (2) a polymerized monomer composition, said copolymer formed from a polymeric subunits free radical initiated polymerization of said monomer composition resulting in a covalent bond between said polymeric subunits and polymerized units of said monomer composition.
A porous membrane which is formed throughout its solid bulk matrix consisting essentially of a copolymer of polymeric subunits derived from a sulfone polymer and a polymerized monomer composition, said copolymer formed from polymer subunits free radical initiated polymerization of a monomer composition resulting in a covalent bond between said polymer subunits and polymerized units of said monomer composition.
A porous membrane which is water wettable after being dried and which is formed throughout its solid bulk matrix consisting essentially of a copolymer of polymeric subunits derived from a sulfone polymer and a polymerized monomer composition, said copolymer formed from polymer subunits free radical initiated polymerization of a monomer composition resulting in a covalent bond between said polymer subunits and polymerized units of said monomer composition.
Dependencies are inferred from the claim text.