Patent ID: 7211538
Filing Date: 2007-05-01
Classification: C07F,C08F

Abstract:
1. Catalyst component for the polymerization of alpha-olefins in solution, in suspension, in gas phase at low and high pressure and temperature or in mass at high pressures and high or low temperatures, wherein the catalyst component is defined by general formulas I or II wherein: R equal to or different from each other, is hydrogen or a radical which contains from 1 to 20 carbon atoms; this group contains heteroatoms of groups 14 to 16 of the periodic table of the elements and boron; at least one group R contains a group OSiR″ m ranging from 1 to 4; groups Q are equal to or different from each other; the free valences of every Q are filled with groups R according to the value of c index; two groups R are united to form a ring from 5 to 8 atoms; L, equal to or different from each other, is a cyclic organic group united to M through a π bond, it contains a cyclopentadienyl ring, that is fused with one or more other rings, or it is an atom from groups 15 or 16 of the periodic table; L M is a metal from groups 3, 4, or 10 of the periodic table, lanthanide or actinide; X, equal to or different from each other, is halogen, hydrogen, OR′″, N(R′″) x is 1 or 2, y is 2 or 3 such that x+y=4; d ranges from 0 to 2; a, b and c are integers from 0 to 10, such that a+b+c≧1.