Importance

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Abstract

Olefin polymerization is carried out in the presence of a catalyst comprising, as main components, the following Compounds (A) and (B): (A) a transition metal compound containing a transition metal selected from the IVB Group of the Periodic Table having the formula: M.sup.1 R.sup.1.sub.a R.sup.2.sub.b R.sup.3.sub.c R.sup.4.sub.d wherein M.sup.1 is a Ti, Zr, or Hf atom; a, b, c, and d are independently an integer of 0 to 4; and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are selected from the group consisting of hydrogen atom, oxygen atom, halogen atom, C.sub.1-20 alkyl, C.sub.1-2 alkoxy, C.sub.6-20 aryl, tolyl, xylyl, benzyl, C.sub.1-20 acyloxy, allyl, trimethylsilyl, and (trimethylsilyl)methyl, acetylacetonate, substituted acetylacetonate, dimethyl ether, diethyl ether, tetrahydrofuran, tetrahydrothiophene, ethylbenzoate, acetonitrile, benzonitrile, trimethylamine, triethylamine, tributylamine, N,N-dimethylaniline, pyridine, 2,2'-bipyridine, phenanatholorine, triethylphosphine, triphenylphosphine, ethylene, butadiene, 1-pentene, isoprene, pentadiene, 1-hexene, benzene, toluene, xylene, cyclopheptatriene, cyclooctadiene, cyclooctatriene, and cyclooctatetraene; and (B) a boron compound wherein at least one of Compounds (A) and (B) is carried on a carrier; and an organoaluminum compound. According to the present invention, an olefin homopolymer or a copolymer of olefins having excellent properties such as high bulk density, can be effectively produced without using a great amount of an organoaluminum compound.

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First Claim