C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/607
C08F 10/02 (2006.01) C08F 2/42 (2006.01) C08F 10/00 (2006.01) C08F 210/16 (2006.01)
Patent
CA 1267994
ABSTRACT OF THE DISCLOSURE A solution polymerization process for the preparation of high molecular weight polymers of alpha-olefins selected from the group consisting of homopolymers of ethylene and copolymers of ethylene and C4 - C12 alpha-olefins is disclosed. The process comprises feeding monomer(s), coordination catalyst and inert hydrocarbon solvent to a reactor, polymerizing the monomers at a temperature of up to 320°C and a pressure of less than 25 MPa, and deactivating the catalyst in the solution so obtained. The catalyst is deactivated by sequentially admixing therewith a minor amount of a deactivating agent followed by a solution of a salt of an alkaline earth metal or zinc and an aliphatic monocarboxylic acid dissolved in hydrocarbon solvent. The deactivating agent is selected from the group consisting of carbon dioxide, carbon monoxide and dimethyl carbonate. The hydrocarbon solvent and other volatile matter are then separated from the resultant solution and a composition comprising said high molecular weight polymer is recovered. The amount of deactivating agent is not more than 2.5 moles of deactivating agent per mole of halogen plus alkyl radicals in the coordination catalyst. DC-0182
500195
Zboril Vaclav George
Zelonka Ronald Andrew
Du Pont Canada Inc.
Sim & Mcburney
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