| abstract |
A magnesium halide adduct represented by the formula (I): MgX 2 .mROH.nE.pH 2 O, in which X is chlorine, bromine, a C 1 -C 12 alkoxy, a C 3 -C 10 cycloalkoxy or a C 6 -C 10 aryloxy, with the proviso that at least one X is chlorine or bromine; R is a C 1 -C 12 alkyl, a C 3 -C 10 cycloalkyl or a C 6 -C 10 aryl; E is an o-alkoxybenzoate compound represented by the formula (II): in which R 1 and R 2 groups are independently a C 1 -C 12 linear or branched alkyl, a C 3 -C 10 cycloalkyl, a C 6 -C 10 aryl, a C 7 -C 10 alkaryl or an C 7 -C 10 aralkyl, the R 1 and R 2 groups are identical to or different from the R group; m is in a range of from 1.0 to 5.0; n is in a range of from 0.001to 0.5; and p is in a range of from 0 to 0.8, is disclosed. A catalyst component useful in olefin polymerization, which comprises a reaction product of (1) the magnesium halide adduct, (2) a titanium compound, and optionally (3) an electron donor compound, is also disclosed. |