Organometallic catalysts for the polymerization and copolymeriza

Details Organometallic catalysts for the polymerization and copolymeriza Organometallic catalysts for the polymerization and copolymeriza

1997-10-30

1999-11-02

Nazario-Gonzalez, Porfirio

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

502103, 502117, 502120, 502152, 526127, 526130, 526134, 526160, 526943, 534 11, 534 15, 556 7, 556 8, 556 20, 556 21, 556 43, 556 46, 556 52, 556 58, 556136, 556137, 556140, 556146, C07F 1700, C07F 700, C08F 4643, B01J 3100

Patent

active

059773928

ABSTRACT:
Catalyst component for the polymerization of alpha-olefins of general formula (I) ##STR1## wherein: M is a transition metal of groups 3, 4-10, lanthanide or actinide of the periodic table of the elements; A is a ring with delocalized .pi. electrons, L is a neutral Lewis base; m is an integer whose value can be: 0 or 1; E is selected from the group comprising: BR.sup.II, CR.sup.II.sub.2, SiR.sup.II.sub.2, GeR.sup.II.sub.2 ; Hal is selected from the group comprising iodine, bromine or chlorine; R.sup.III has the same meaning of R.sup.II ; Si is a silicon atom; D is selected from the group comprising: O, S, NR.sup.IV, PR.sup.IV, OR.sup.IV, SR.sup.IV, NR.sup.IV.sub.2, PR.sup.IV.sub.2 ; each X group equal to or different from each other is selected from the group comprising hydrogen, halide, alkyl, cycloalkyl, aryl, alkenyl, arylallyl, arylalkenyl or alkylaryl with 1 to 20 carbon atoms, n is a number whose value can be: 0, 1, 2 or 3, in order to full the remaining valences of metal M. It is also described a method for supporting the compound of formula I.

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