| http://www.w3.org/ns/prov#value | - Preferred ketene multimers for use in the process of this invention have the formula (1) where n is an integer of at least 1, R and R, which may be the same or different, are saturated or unsaturated straight chain or branched alkyl or alkenyl groups having 6 to 24 carbon atoms, preferably 10 to 20 carbon atoms, and more preferably 14 to 16 carbon atoms, and R' is a saturated or unsaturated strai
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