Polymer and porous structure
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United States of America Patent
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Dec 8, 1998
Grant Date -
N/A
app pub date -
Oct 2, 1995
filing date -
Feb 2, 1993
priority date (Note) -
Expired
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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##
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