INHIBITING SCALE IN VINYL MONOMER POLYMERIZATION

摘要

Disclosed is a method of inhibiting the formation of scale on reactor surfac es in contact with a polymerizing vinyl monomer comprising contacting said monomer with a terpolymer which comprises the condensation reaction product of (A) an aromatic compound that contains the group (I) or (II) where Q is OR o r SR and R is hydrogen, alkyl from C1, to C15, or aryl, alkaryl, or aralkyl fr om C6 to C15 (B) about 0.1 to about 10 moles of a carbonyl compound per mole of said aromatic compound; and (C) about 0.1 to about 10 moles of a thiourea pe r mole of said aromatic compound.