C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/607
C08F 2/42 (2006.01) C08F 10/00 (2006.01) C08F 10/02 (2006.01) C08F 210/16 (2006.01)
Patent
CA 1268297
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 C3 -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) a minor amount of a first deactivator, (b) a solution of a salt of an alkaline earth metal or zinc and an aliphatic monocarboxylic acid dissolved in hydrocarbon solvent, and (c) an organosilicon compound. The solution of (b) and the compound of (c) may be combined. The first deactivator may be water, a nitrogenous base or carbon dioxide or the like. The organosilicon compound is of the formula SiR'n(OR)")4-n where R' and R" are alkyl or cycloalkyl and n is 0-3. 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. DC-0180
500194
Du Pont Canada Inc.
Sim & Mcburney
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