| http://www.w3.org/ns/prov#value | - Another suitable class of additives is that of bisquaternary salts of the general formula wherein R1 is an alkyl group, including saturated, unsaturated, and substituted alkyl groups, preferably linear, although some branching is acceptable, and preferably with from about 12 to about 24 carbon atoms, more preferably with from about 14 to about 20 carbon atoms, and most preferably with from about 1
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