Patent ID: 6500907
Filing Date: 2002-12-31
Classification: C08F,Y10S

Abstract:
A catalyst system suitable for polymerizing unsaturated monomers and consisting essentially of active constituents obtained by reactingA) a transition metal compound selected from the group consisting of complexes with ligands comprising an element from group 15 of the Periodic Table of the Elements where the transition metal is selected from the elements Ti, Zr, Hf, Sc, V, Nb, Ta, Cr, Mo, W, Fe, Co, Ni, Pd or Pt or from an element of the rare earth metals, of metallocene complexes and of half-sandwich complexes with B) aluminum trifluoride, C) a cation-forming compound other than B), selected from the group consisting of moderate and positively charged Lewis acids of the formula MetRâ€²n, [MetRâ€²n+1]+[An]âˆ’ or [MetRâ€²nâˆ’1]+[An]âˆ’â€ƒwhere Met is an element from groups 13 to 16 of the Periodic Table of Elements, Râ€² is inorganic or organic radicals which can be the same or different, n is an integer from 3 to 5 and represents the valence of Met, and [An]âˆ’ is an anion, Brnsted acids with an anion of low nucleophilicity, of the formula [MetRâ€²n+1]âˆ’, â€ƒwhere Met is an element from groups 13 to 15 of the Periodic Table of Elements, Râ€² is inorganic or organic radicals which can be the same or different, and n is an integer from 2 to 5 and represents the valence of Met, anions of low nucleophilicity, of the formula Râ€²SO3âˆ’, â€ƒwhere Râ€² is an inorganic or organic radical, strong neutral Lewis acids of the formula II M3X1X2X3 â€ƒâ€ƒII â€ƒwhere M3 is an element from the main group III of the Periodic Table, and X1, X2 and X3 are hydrogen, C1- to C10-alkyl, C6- to C15-aryl, alkylaryl, arylalkyl, haloalkyl or haloaryl having in each case 1 to 10 carbon atoms in the alky radical and 6 to 20 carbon atoms in the aryl radical, or are fluorine, chlorine, bromine or iodine, and ionic compounds having strong Lewis-acid cations, of the formula III [(Ya+)Q1Q2 . . . Qz]d+â€ƒâ€ƒIII whereY is an element of main groups I to VI or of subgroups I to VIII of the Periodic Table, Q1 to Qz are radicals bearing a single negative charge, selected from the group consisting of C1-C28-alkyl, C6- to C15-aryl, alkylaryl, arylalkyl, haloalkyl, haloaryl each having 6 to 20 carbon atoms in the aryl and 1 to 28 carbon atoms in the alkyl radical, C3- to C10-cycloalkyl, which can be unsubstituted or substituted by C1- to C10-alkyl groups, or are halogen, C1- to C28-alkoxy, C6- to C15-aryloxy, silyl and mercaptyl groups a is an integer from 1 to 6 and z is an integer from 0 to 5, d being the difference a-z but being greater than or equal to 1, and, optionally, D) one or more metal compounds of the formula IV M1(R21)r(R22)s(R23)tâ€ƒâ€ƒIV where M1 is an alkali metal, an alkaline earth metal or a metal from group 13 of the Periodic Table, R21 is hydrogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl or arylalkyl having in each case 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical, R22 and R23 are hydrogen, halogen, C1-C10-alkyl, C6-C15-aryl, alkylaryl, arylalkyl or alkoxy having in each case 1 to 10 carbon atoms in the alkyl radical and 6 to 20 carbon atoms in the aryl radical r is an integer from 1 to 3, and s and t are integers from 0 to 2, the sum r+s+t corresponding to the valence of M1.