| 摘要 |
PURPOSE:To produce title high-quality polymer in high yields, by subjecting an alpha- olefin to vapor-phase polymerization or a combination of slurry polymerization or bulk polymerization and vapor-phase polymerization, in the presence of a specified preactivated catalyst. CONSTITUTION:Titled polymer is produced by subjecting an alpha-olefin to vapor- phase polymerization, bulk polymerization plus subsequent vapor-phase polymerization or slurry polymerization plus subsequent vapor-phase polymerization, in the presence of a preactivated catalyst prepared by combining (I) a solid product obtained by reacting (II) a solid product obtained by reacting a trivalent-metal halide such as AlCl3 with a hydroxixe, oxide or carbonate of a bivalent metal, a double salt thereof or a hydrate of a bivalent-metal-containing compound, such as Mg(OH)2, with an electron donor such as ethyl acetate and an electron acceptor such as AlCl3 or TiCl3 (each of electron donor and electron acceptor is reacted once or 2-10 times, and TiCl4 must be used at least once); an organic Al compoud such as trimethylaluminum; an electron donor; and an alpha-olefin such as ethylene.
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