Patent ID: 6689846
Filing Date: 2004-02-10
Classification: C08F

Abstract:
A process for polymerizing &agr;-olefins capable of polymerization by an insertion mechanism using a Ziegler-Natta catalysts system in at least two stages, wherein(i) a first stage, where polymerization of an &agr;-olefin to form a polymer matrix is carried out in at least one bulk reactor, and (ii) a second stage, where copolymerization of ethylene and &agr;-olefin(s) in the presence of said polymer matrix from the first stage is carried out in at least one gas phase reactor, and wherein an antifouling composition comprising a mixture of an antistatic agent and a catalyst killer agent is fed into said gas phase reactor(s) of the second stage, but not into said reactor(s) of the first stage.