| abstract |
The component of magnesium halide adduct is represented by MgX 2 mROH nE pH 2 O, in which X is chlorine, bromine, 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 represented by the general formula (II), wherein R 1 and R 2 which can be the same or different to each other, are hydrogen or linear or branched C 1 -C 10 hydrocarbon groups, C 3 -C 10 cycloalkyl, C 6 -C 10 aryl, C 7 -C 10 alkaryl or aralkyl, optionally, the said aryl or alkylaryl or arylalkyl is substituted by one or more halogen in the aromatic ring, R 1 and R 2 can form ring or fused ring. R 3 and R 4 have the same meaning of R 1 and R 2 except that they can't be hydrogen, m is 1-5, n is 0.005-1.0, and p is 0-0.8. Spherical catalyst component and catalyst made from the above spherical magnesium halide adduct and their use in polymerising the alpha-olefins CH2=CHR and their mixture are provided, in which R is hydrogen or C 1 -C 12 alkyl or aryl. |