| http://www.w3.org/ns/prov#value | - An example of a preferred zwitterionic polyamine according to the present invention which has an excess of backbone quaternized units, has the formula: wherein R is a 1,5-hexamethylene, w is 2; R1 is ???(R2O)tY, wherein R2 is ethylene, Y is hydrogen or ???SO3M, Q is methyl, m is 1, t is 20.
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