MAGNESIUM HALIDE ADDUCT, OLEFINS POLYMERIZATION CATALYST COMPONENT AND CATALYST MADE THEREFROM

摘要

The invention provides a magnesium halide complex, having a composition represented by the formula (I): MgX 2 ·mROH·nE·pH 2 O (I),
wherein X is chloride, bromide, or a C 1 -C 14 alkoxy or aryloxy; R is C 1 -C 12 alkyl, C 3 -C 10 cycloalkyl or C 6 -C 10 aryl; E is a gem-dihydrocarbyloxy hydrocarbon represented by the formula (II):
wherein the R 1 and R 2 , which are identical or different, are hydrogen or C 1 -C 10 linear or branched alkyl, C 3 -C 10 cycloalkyl, C 6 -C 10 aryl, C 7 -C 10 alkylaryl or arylalkyl, said aryl, alkylaryl and arylalkyl being optionally substituted by one or more halogen atoms on aromatic ring; the R 1 and R 2 are optionally bonded to each other to form a ring or a fused ring system; the R 3 and R 4 have the same meanings as defined for the R 1 and R 2 other than hydrogen; m is in a range of from 1 to 5; n is in a range of from 0.005 to 1.0; and p is in a range of from 0 to 0.8. The invention further relates to a spherical catalyst component and a catalyst prepared from the spherical magnesium halide complex, and to use of the catalyst in the polymerization of ±-olefin CH 2 =CHR or a mixture thereof, in which R is H, or alkyl or aryl having 1 to 12 carbon atoms.