| http://www.w3.org/ns/prov#value | - R units are selected from the group consisting of C2-C12 alkylene, ???(R1O)xR1???, and mixtures thereof; wherein R1 is C2-C3 alkylene and mixtures thereof; X is a water soluble anion; provided at least one backbone nitrogen is quaternized or oxidized E units are ???(R1O)xB wherein
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