Polymer and porous structure
AssigneeNorth West Water Group PLC
InventorsHoward Matthew Colquhoun, Andrew Lennard Lewis
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Abstract
A polymer characterised by the presence of ylid linkages in the main polymer chain of formula (A) where the dashed line represents the remainder of a ring system for which the N+ provides a heteroatom, and E is a strongly electron withdrawing group. Preferred polymers in accordance with the invention are characterised by the presence of linkages in the polymer main chain of formula (I). The polymers of the invention may be fabricated as membranes for use in various separation processes, e.g. ultrafiltration, nanofiltration, and reverse osmosis. ##STR1##
Claims31
A polymer having ylid linkages in the main polymer chain of the formula ##STR29## where the dashed line represents the remainder of a ring system for which the N.sup.+ provides a heteroatom, and E is a divalent strongly electron withdrawing group.
Dependencies are inferred from the claim text.