Ethylene/propylene copolymer rubbers

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 4/68 (2006.01) C08F 2/34 (2006.01) C08F 10/00 (2006.01) C08F 210/16 (2006.01) C08F 210/18 (2006.01)

Patent

CA 2126793

A catalyst system comprising: (a) a catalyst precursor consisting essentially of the reaction product of vanadium (acetylacetonate)3 and a compound having the formula AlR(3-a)Xa wherein each R is independently alkyl having 1 to 14 carbon atoms; each X is independently chlorine, bromine, or iodine; and a is 1or 2; the atomic ratio of aluminum to vanadium in the precursor is 1:1 to 3:1; and the oxidation state of the vanadium in the reaction product is plus 2; (b) optionally, a support for said precursor; and (c) a halide substituted hydrocarbyl cocatalyst; and (d) optionally, a promoter, which is a chlorinated ester having at least 2 chlorine atoms; a saturated or unsaturated aliphatic halocarbon having at least 3 carbon atoms and at least 6 halogen atoms; or a haloalkyl substituted aromatic hydrocarbon wherein the haloalkyl substituent has at least 3 halogen atoms.

Système catalytique renfermant : a) un précurseur catalytique, constitué essentiellement du produit de réaction d'acétylacétonate de vanadium (III) avec un composé de formule AlR(3-a)Xa - où chaque R représente indépendamment un alkyle de 1 à 14 atomes de carbone, chaque X est indépendamment du chlore, du brome ou de l'iode, a est 1 ou 2, le rapport atomique aluminium/vanadium dans le précurseur se situe de 1 à 3, et le degré d'oxydation du vanadium dans le produit de réaction est plus 2; b) facultativement, un support pour ce précurseur; c) un cocatalyseur hydrocarboné avec substitution par un halogène; d) facultativement, un promoteur, soit un ester chloré, renfermant au moins 2 atomes de chlore, un composé aliphatique, saturé ou insaturé, renfermant au moins 3 atomes de carbone et au moins 6 atomes d'halogène, ou un dérivé de substitution haloalkylé d'un composé aromatique, le groupe haloalkyle comptant au moins 3 atomes d'halogène.

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