Mitsubishi Chemical Corporation

Japan Polypropylene Corporation

Takehiro Sagae

Yumito Uehara

Yoshinori Suga

Yasuo Maruyama

Eiji Isobe

Yoshiyuki Ishihama

Miyuki Murase

Kiyoshi Yukawa

Morikazu Niibe

Masahide Murata

The present invention relates to a method for producing a catalyst component for olefin polymerization, the method including step (3): granulating, by a spray drying, an aqueous slurry of an ion-exchangeable second layered silicate (B) that satisfies that an average particle diameter is 0.03 μm to 0.4 μm, and a Rosin-Rammler distribution constant n determined from a particle size distribution is 1.5 or more; and step (4): bringing the obtained first layered silicate granulated particles (C) into contact with acid to obtain chemically treated ion-exchangeable second layered silicate granulated particles (D).

Method for producing catalyst component for olefin polymerization, method for producing catalyst for olefin polymerization, and method for producing olefin polymer

Provided are a catalyst component for olefin polymerization which is highly active, an olefin polymerization catalyst, and a process for producing an olefin (co)polymer using the catalyst. The catalyst component for olefin polymerization is characterized by comprising an ion-exchanged phyllosilicate having the property 1 and preferably further having the property 2, etc.

Catalyst component for olefin polymerization, catalyst for olefin polymerization, and process for producing olefin (co)polymer using the same

Disclosed is a propylene block copolymer having excellent flexibility and impact resistance and showing a good polymer powder form. Also disclosed is a process for producing the copolymer. More specifically, the copolymer is a novel propylene block copolymer which satisfies a specific requirement and is produced by a process comprising continuously performing a multi-step polymerization composed of a former step in which a propylene homopolymer component or a specific propylene copolymer component is produced in the presence of a metallocene catalyst carried on a support and a latter step in which propylene and a specific copolymer component are produced by gas phase polymerization.

Propylene block copolymer and process for production thereof

Polymerization of olefins

A particulate phyllosilicate mixture comprising a mixture containing a phyllosilicte belonging to the smectite group and a phyllosilicate belogning to the mica group, the phyllosilicate particle having a content of the phyllosilicate belonging to the smectite group of 0.1 to 50% by weight and optionally satisfying the following requirements (a) to (c):

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.

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Yokkaichi, Japan

Takehiro Sagae