| abstract |
A novel olefin polymerization catalyst is provided whichncomprises (A) a transition metal compound or lanthanoid compoundncontaining two or more atoms selected from the group consistingnof boron, nitrogen, oxygen, phosphorus, sulfur, and selenium;nand (B) a Lewis acid. A process for producing an olefin polymernis alsoprovided. The catalyst has a high olefin polymerizationnactivity without a combined use of an expensive organoaluminumnoxy-compound or organoboron compound, and can maintain the highnactivity for a long polymerization time. |