| http://www.w3.org/ns/prov#value | - ive; R4, R5, R6 and R7 are lower alkyl groups containing 1 to 4 carbon atoms, inclusive; X is a halogen selected from the group consisting of chlorine and bromine; and m is an integer of sufficient magnitude to provide a polymer having a molecular weight of sufficient magnitude to form a film; the equivalent weight of the polymer (based on ionic nitrogen) being no greater than about 2000.
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