Process for the preparation of ethylene copolymers

C - Chemistry – Metallurgy – 08 – F

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C08F 210/00 (2006.01) C08F 2/06 (2006.01) C08F 4/64 (2006.01) C08F 10/00 (2006.01) C08F 210/02 (2006.01) C08F 210/06 (2006.01) C08F 255/00 (2006.01) C08F 255/02 (2006.01) C08L 23/08 (2006.01) C08L 23/10 (2006.01) C08L 51/06 (2006.01) C08F 210/16 (2006.01)

Patent

CA 2456951

Process for the preparation of ethylene copolymers comprising the copolymerization of ethylene with olefins CH2=CHR,in which R is a hyrdocarbyl radical with 1-12 carbon atoms carried out in the presence of a catalyst comprising (i) a solid catalyst component comprising Mg, Ti, halogen and specific 1,3-diethers of formula (I) in which R is a C1-C10 hydrocarbon group, R1 is methyl or ethyl, optionally containing a heteroatom, and R2 is a C4-C12 linear alkyl optionally containing a heteroatom, and (ii) an organo-A1 compound. The obtained copolymers are endowed with good comonomer distribution.

Cette invention concerne un procédé de préparation de copolymères éthyléniques consistant à copolymériser l'éthylène et des oléfines CH¿2?=CHR, R représentant un radical hydrocarbyle comportant entre 1 et 12 atomes de carbone, laquelle copolymérisation est réalisée en présence d'un catalyseur composé (i) d'un composant catalyseur solide comprenant Mg, Ti, halogène et les 1,3-diéthers spécifiques représentés par la formule (I) dans laquelle R désigne un groupe hydrocarbure C¿1?-C¿10 ?; R¿1? désigne méthyle ou éthyle, contenant éventuellement un hétéroatome ; et R¿2 ?désigne un alkyle linéaire¿ ?C4-C12 contenant éventuellement un hétéroatome ; et (ii) d'un composé organo-Al. Les copolymères obtenus présentent une bonne répartition des comonomères.

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