Toho Titanium Co., Ltd.

Toho Catalyst Co., Ltd.

Hidetoshi Umebayashi

Motoki Hosaka

Kenji Goto

Toshihiko Sugano

Makoto Nakano

Takuo Kataoka

Hideo Tsukamoto

A solid catalyst component for polymerization of olefins is disclosed which can produce a polymer having low stickiness (tackiness) of polymer particles, excellent flowability, and favorable particle size distribution. The solid catalyst component for polymerization of olefins includes titanium, magnesium, a halogen atom and an internal electron donor, wherein the solid catalyst component has a multimodal pore volume distribution measured by a mercury intrusion method and has one or more peak tops in each of a pore radius range from 0.002 &#x3bc;m to 1 &#x3bc;m and a pore radius range from larger than 1 &#x3bc;m to 30 &#x3bc;m or smaller, and a ratio represented by pore volume V1 derived from pores in the radius range from 0.002 &#x3bc;m to 1 &#x3bc;m/pore volume V2 derived from pores in the radius range from larger than 1 &#x3bc;m to 30 &#x3bc;m or smaller is 0.30 to 0.65.

Solid catalyst component for polymerization of olefins, method for producing solid catalyst component for polymerization of olefins, catalyst for polymerization of olefins, method for producing polymer of olefin, method for producing polymer propylene copolymer and propylene copolymer

A solid catalyst component for olefin polymerization makes it possible to polymerize an olefin with high polymerization activity when used for an olefin polymerization catalyst, and produce an olefin polymer having a low fine powder content, a low coarse powder content, and a low volatile organic compound (VOC) content in high yield. The solid catalyst component for olefin polymerization is produced by suspending (a) a dialkoxymagnesium, and (b) at least one alcohol selected from ethanol, n-propanol, n-butanol, isopropanol, isobutanol, and t-butanol, in an inert organic solvent so that the total amount of the alcohol is 0.5 to 1.5 parts by mass based on 100 parts by mass of the dialkoxymagnesium, to prepare a suspension, and bringing (c) an internal electron donor and (d) a titanium halide compound into contact with the suspension.

Solid catalyst component for polymerization of olefins, catalyst for polymerization of olefins, and method for producing olefin polymer

A propylene block copolymer with a high proportion of ethylene-propylene copolymer particles (rubber component) well dispersed in a propylene polymer exhibiting well-balanced rigidity and impact resistance can be obtained by using a solid catalyst for polymerization of olefins comprising (a) a solid catalyst component with controlled morphology, comprising magnesium, titanium, and a halogen atom, having an average particle diameter, specific surface area, and pore volume in a specific range, and having a pore size distribution in which an cumulative pore volume with a pore size of 100 &#x212b; or less is more than 50%, (b) an organoaluminum compound, and (c) an organosilicon compound. The block copolymer is very useful particularly for the application of vehicle parts such as a bumper and parts for household electric appliances.

Polymerization and propylene block copolymer

Solid catalyst component for polymerization of olefins and catalyst

Growing community of inventors

Chigasaki, Japan

Hidetoshi Umebayashi