Patent ID: 6534607
Filing Date: 2003-03-18
Classification: C08F,Y10S

Abstract:
Catalyst for the polymerization of olefins, comprising the product of the reaction between the following components:(A) a cyclopentadienyl compound of the formula (I): (C5R1xâˆ’mH5âˆ’x)R2m(C5R1yâˆ’mH5âˆ’y)nMQ3âˆ’nâ€ƒâ€ƒ(I) â€ƒin which M is Ti, Zr or Hf, C5R1xâˆ’mH5âˆ’x and C5R1yâˆ’mH5âˆ’y are cyclopentadiene rings substituted in the same way or different ways, the substituents R1, which are identical or different, are alkyl, alkenyl, aryl, alkylaryl or arylalkyl radicals which have from 1 to 20 carbon atoms and can also contain one or more Si atoms, or Si(CH3)3 groups, or also two or four substituents R1 of the same cyclopentadienyl group can form one or two rings having from 4 to 6 carbon atoms, R2 is a group forming a bridge link between the two cyclopentadiene rings and is selected from the group consisting of CR32, C2R34, SiR32, Si2R34, GeR32, Ge2R34, R32SiCR32, NR1, and PR1; substituents R3, which are identical or different, being Ror hydrogen, and two or four substituents R3 can form one or two rings having from 3 to 6 carbon atoms, the radicals Q, which are identical or different, are halogen, hydrogen, R1 or OR1, SR1, NR12 or PR12, m is 0 or 1, n is 0 or 1, being 1, if m=1, x is an integer between (m+1) and 5, and y is an integer between m and 5; (B) a mixture composed of: (B1) 1-99 mol-% of an organoaluminium compound of the formula (II): Alâ€”(CH2â€”CR4R5R6)3âˆ’zHzâ€ƒâ€ƒ(II) â€ƒin which R4 is an alkyl, alkenyl or arylalkyl group having from 1 to 10 carbon atoms, R5 is an alkyl, alkenyl or alkylaryl group with a branched chain having from 3 to 10 carbon atoms, or R4 and R5 are fused together to form a ring having from 4 to 6 carbon atoms, R6 is hydrogen or an alkyl, alkenyl or arylalkyl group having from 1 to 10 carbon atoms, and z is 0 or 1; (B2) 1-99 mol-% of an organoaluminium compound of the formula (III): AlR33âˆ’wHwâ€ƒâ€ƒ(III) in which the radicals R3, which are identical or different, are alkyl, alkenyl or alkylaryl radicals which have from 1 to 10 carbon atoms and can also contain Si or Ge atoms, with the proviso that at least one of the substituents R3 is other than a linear alkyl group, and w is 0 or 1, the compounds of the formula (II) defined above being excluded; and (C) water, the molar ratio between the organometallic aluminium compounds and the water being between 1:1 and 100:1.