PROCESS FOR POLYMERIZING OLEFINS

摘要

The invention relates to a process for producing an olefin polymer of a low polydispersity index in a solution polymerization carried out in the presence of a cationic catalyst in a reactor containing a liquid boiling hydrocarbon phase and a vapor space above said phase. The polymerization is carried out in the presence of a non-mechanical agent capable of suppressing foam formation during said polymerization. The agent may be selected from (a) a liquid hydrocarbon spray introduced into the vapor space of the reactor, (b) a fresh olefin liquid feed at a temperature lower than that of the liquid phase, and (c) a chemical foam-suppressor e.g. a polyoxyalkylene glycol or a silicone.