Components and catalysts for the polymerization of olefins

Details Components and catalysts for the polymerization of olefins Components and catalysts for the polymerization of olefins

C - Chemistry, Metallurgy

08

F

C08F 10/00 (2006.01)

Patent

CA 2270239

The invention relates to solid catalyst components for the polymerization of olefins CH2=CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Ti, Mg, halogen and an electron donor compound selected from cyanoesters of formula (I): wherein R1 is a C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, alkylcycloalkyl, aryl, arylalkyl or alkylaryl group; n is 0, 1, 2 or 3; R2, R3, R4 and R5 are independently selected from hydrogen or C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, cycloalkylalkyl, alkylcycloalkyl, aryl, arylalkyl or alkylaryl groups; two or more of R2 and R3, and R4 and R5, can be joined to form a cycle. Said catalyst components when used in the polymerization of olefins are characterized by an excellent response to hydrogen and capability to produce polymers with broad Molecular Weight Distribution.

L'invention concerne des constituants solides de catalyseur pour la polymérisation d'oléfines CH¿2?=CHR, où R est hydrogène ou bien un radical hydrocarbyle qui comporte de 1 à 12 atomes de carbone, renfermant Ti, Mg, un halogène et un composé donneur d'électrons choisi parmi des cyanoesters de formule (I). Dans ladite formule, R¿1? est un groupe alkyle, alcényle, cycloalkyle, cycloalkylalkyle, alkylcycloalkyle, aryle, arylalkyle ou alkylaryle C¿1?-C¿20? linéaire ou ramifié; n vaut 0, 1, 2 ou 3. R¿2?, R¿3?, R¿4? et R¿5? sont choisis indépendamment parmi hydrogène ou des groupes alkyle, alcényle, cycloalkyle, cycloalkylalkyle, alkylcycloalkyle, aryle, arylalkyle ou alkylaryle C¿1?-C¿20? linéaires ou ramifiés; deux ou plus de deux éléments parmi R¿2? et R¿3?, et R¿4? et R¿5?, peuvent être reliés pour former un cycle. Lorsqu'ils sont utilisés pour la polymérisation d'oléfines, les constituants de catalyseur considérés se caractérisent par une excellente réponse à l'hydrogène et par la capacité de fournir des polymères ayant une large répartition des poids moléculaires.

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