Mitsubishi Chemical Corporation

Yoshiyuki Ishihama

Yumito Uehara

Yoshinori Suga

Yasuo Maruyama

Eiji Isobe

Takehiro Sagae

Yukitaka Goto

Ethylene-&agr;-olefin copolymer

A method for polymerizing olefins which comprises using a catalyst which comprises, as the essential components, (A) a metallocene-type transition metal compound and (B) at least one member selected from the group consisting of (1) an ion-exchanging layered compound other than a silicate and (2) an inorganic silicate, which is obtained by salt-treatment and/or acid-treatment and which has a water content of not higher than 1% by weight.

Method for polymerizing olefins using a novel catalyst

A catalyst for polymerizing an olefin, which comprises (A) a metallocene transition metal compound, (B) (1) an ion-exchanging layered compound other than a silicate or (2) an inorganic silicate prepared by treating a starting ion-exchanging layer compound other than a silicate or a starting silicate with a salt, an acid, or a combination thereof, said component (B) having a water content not higher than 1% by weight which is obtained by heat-dehydrating component (B) under an inert gas atmosphere or under reduced pressure, and (C) an organoaluminum compound.

Catalyst for polymerizing an olefin and method for polymerizing the

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Yokkaichi, Japan

Yoshiyuki Ishihama