| 摘要 |
A catalyst for olefin polymerization comprising (A) a solid catalyst component which is prepared by causing (a) a magnesium compound, (b) a tetravalent titanium halide compound, and (c) an electron donor compound to come in contact with each other, (B) an organoaluminum compound of the formula R<SUP>1</SUP><SUB>p</SUB>AlQ<SUB>3-p</SUB>, and (C) an organosilicon compound of the formula SiR<SUP>2</SUP>R<SUP>3</SUP>(OR<SUP>4</SUP>)(OR<SUP>5</SUP>), and (D) an organosilicon compound of the formula R<SUP>6</SUP><SUB>x</SUB>Si(OR<SUP>7</SUP>)<SUB>4-x </SUB>exhibits a higher hydrogen activity than conventional catalysts.
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