Back to results
US 10,822,461 B2Granted
Polysulfone-urethane copolymer, membranes and products incorporating same, and methods for making and using same
AssigneeFresenius Medical Care Holdings, Inc.
InventorsGeoffrey Russell, James White, Jiunn Teo, Kevin Hudson, Monica Hall, Praveen Kosaraju
Life of this patent
Estimating the term…
Abstract
A polysulfone-urethane copolymer is disclosed, which can be used as a membrane polymer, e.g., a matrix polymer, a pore forming agent, or both, while enhancing a membrane's blood compatibility. Methods are disclosed for forming the copolymer and incorporating the copolymer in membranes (e.g., spun hollow fibers, flat membranes) and other products.
Claims20
A polysulfone-urethane copolymer comprising formula (I) or formula (II):
- -[D-E]a1-[D-G-D]a2-[E-D]a3- (I)
- [D-(E-D)b1-(G)b2-(D-E)b3]b4- (II)
- wherein G is a urethane block, D is a divalent residue of an aromatic dihydroxyl compound, E is an aromatic sulfone group, and wherein i) a1, a2 and a3 are independently from 1-100 which randomly or non-randomly repeat in formula (I), and ii) b1, b2, b3, and b4 are independently from 1-100 which randomly or non-randomly repeat in formula (II), and wherein the urethane block is a urethane from a reaction of a diisocyanate and a polyol and wherein the polyol consists of the formula:
- HO—(—CH(Z)—CH2—O)n1—H, where Z is CH3 or H and n1 is from 1 to 100.
1 more element
Dependencies are inferred from the claim text.