Patent ID: 6812305
Filing Date: 2004-11-02
Classification: C08F

Abstract:
A process for preparing a catalyst system for the polymerization of olefins, which comprises:initially reacting at least one compound of formula Ia or Ib with a molecular activator of formula IIa or IIb shown below wherein the variables are defined as follows: M is a transition metal of groups 5 to 10 of the Periodic Table of the Elements, A is selected from the group consisting of N, P and As, Aâ€² is selected from the group consisting of O and S, Nu1,Nu2 are N or P, X1, X2 are halogen or C1-C4-alkoxy; R1, R2 are unsubstituted or substituted C1-C12-alkyl, C3-C12-cycloalkyl, C7-C15-aralkyl, C6-C14-aryl or a five- or six-membered N-containing heteroaryl, R3, R4 are hydrogen, unsubstituted or substituted C1-C12-alkyl, C3-C12-cycloalkyl, C7-C15-aralkyl, C6-C14-aryl or a five- or six-membered N-containing heteroaryl, R5 to R7 are each selected independently from the group consisting of hydrogen, unsubstituted or substituted C1-C12-alkyl, C3-C12-cycloalkyl, C7-C15-aralkyl, C6-C14-aryl and five- and six-membered N-containing heteroaryl, halogen, C1-C6-alkoxy, NO2, SiR8R9R10 and OSiR8R9R10 where adjacent radicals together with the parent heteroaryl optionally form a 5- to 10-membered ring, R8 to R10 are selected independently from the group consisting of hydrogen and substituted or unsubstituted C1-C12-alkyl, C3-C12-cycloalkyl, C7-C15-aralkyl and C6-C14-aryl; [(Lâ€”H)]+[(Mâ€²)Q1Q2Q3Q4]âˆ’â€ƒâ€ƒIIa [(CAr3)]+[(Mâ€²)Q1Q2Q3Q4]âˆ’â€ƒâ€ƒIIb where the radicals have the following meanings: [Lâ€”H]+ is a Bronsted acid, where L is an electron-neutral Lewis base, Mâ€² is an element of group 13 of the Periodic Table of the elements, Q1 to Q4 are selected independently from the group consisting of hydride, unsubstituted or substituted C1-C12-alkyl, C3-C12-cycloalkyl, C7-C15-aralkyl, C6-C14-aryl and halide, with the proviso that not more than two radicals Q1 and Q2 are halide; Ar are identical or different and are selected from the group consisting of unsubstituted or substituted C6-C14-aryl; and thereafter reacting the product of the reaction of at least one compound of formula Ia or Ib with a molecular activator of formula IIa or IIb with an alkylating agent selected from the group consisting of LiR11, MgR11R12 and AlR12R13R14, wherein R11 to R14 are selected independently from the group consisting of unsubstituted or substituted C1-C12-alkyl, C3-C12-cycloalkyl, C7-C15-aralkyl and C6-C14-aryl.