| http://www.w3.org/ns/prov#value | - The membrane of claim 1, wherein the urethane olefin precursor contains recurring urethane units --O--(CO)--NH--, recurring polyether units .paren open-st.(CH2)n --O.paren close-st. where n is an integer in the range of 1 to 6, inclusive, and termini of the general formula --R--(CO)--CR'???CH2, wherein R is O or NH, and R' is H or a lower alkyl.
|
