| 摘要 |
A water filtration membrane comprising an oligo- and polyurethane of the formula
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ-(X)n-
wherein n ranges from 2 to 100, and where
(X) is a block of formula
(A) is a residue of an aliphatic or aromatic diisocyanate linker,
(B) is a residue of a linear oligo- or polysiloxane, especially containing 3 or more Si atoms, and containing alkanol end groups, and optionally further containing one or more aliphatic ether moieties,
preferably comprising said oligo- and polyurethane in an amount of 0.1 to 25 % by weight of the polymer composition further comprising one or more organic polymers selected from the group consisting of polyvinyl pyrolidone, polyvinyl acetates, cellulose acetates, polyacrylonitriles, polyamides, polyolefines, polyesters, polysulfones, polyethersulfones, polycarbonates, polyether ketones, sulfonated polyether ketones, polyamide sulfones, polyvinylidene fluorides, polyvinylchlorides, polystyrenes and polytetrafluorethylenes, copolymers thereof, and mixtures thereof; preferably selected from the group consisting of polysulfones, polyethersulfones, polyvinylidene fluorides, polyamides, cellulose acetate and mixtures thereof,
shows advantageous anti-adhesion properties. |
