Robust polymeric membrane
AssigneePall Corporation
InventorsErik M. Heidenreich, Xuemei Liang, Binbing Han
Life of this patent
Estimating the term…
Abstract
Hydrophilic porous membranes comprising a random copolymer of: (a) 2-hydroxyethyl methacrylate of formula (I): (b) an ethylene glycol dimethacrylate of formula (II): and (c) 1,1,1-trimethylolpropane trimethacrylate of formula (III): and a hydrophobic polymer; filters including the membranes, and methods of making and using the membranes, are disclosed.
Claims14
A hydrophilic microporous membrane comprising a polymer blend comprising a hydrophobic polymer and a random copolymer of:
- (a) 2-hydroxyethyl methacrylate of formula (I):
- (b) polyethylene glycol-400 dimethacrylate;
- and
- (c) 1,1,1-trimethylolpropane trimethacrylate of formula (III):
- wherein the hydrophilic microporous membrane is prepared by casting a polymer solution comprising the polymer blend onto a substrate before carrying out phase inversion of the polymer solution to provide the hydrophilic microporous membrane.
A hydrophilic microporous membrane prepared by a process comprising polymerizing in a solvent:
- (a) 2-hydroxyethyl methacrylate of formula (I):
- (b) polyethylene glycol-400 dimethacrylate;
- and
- (c) 1,1,1-trimethylolpropane trimethacrylate of formula (III):
- to form a random copolymer of (a), (b), and (c);
- wherein the solvent also includes (d) at least one initiator and (e) a hydrophobic polymer, before casting a solution comprising the random copolymer and the solvent onto a substrate, and carrying out phase inversion of the solution to provide the hydrophilic microporous membrane.
A hydrophilic microporous membrane prepared by a process comprising dissolving or dispersing in a solvent:
- (a) 2-hydroxyethyl methacrylate of formula (I):
- (b) polyethylene glycol-400 dimethacrylate;
- (c) 1,1,1-trimethylolpropane trimethacrylate of formula (III):
- (d) a hydrophic polymer;
- and,
- (e) at least one initiator;
- wherein each of (a)-(e) is dissolved or dispersed in the solvent in any order, or simultaneously;
- and,
- polymerizing (a), (b), and (c) to form a random copolymer of (a), (b), and (c), before casting a solution comprising the random copolymer and the solvent onto a substrate, and carrying out phase inversion of the solution to provide the hydrophilic microporous membrane.
Dependencies are inferred from the claim text.