The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 15, 2005
Filed:
Mar. 28, 2002
Motoki Hosaka, Kanagawa, JP;
Hideo Tsukamoto, Kanagawa, JP;
Hidetoshi Umebayashi, Kanagawa, JP;
Makoto Nakano, Kanagawa, JP;
Motoki Hosaka, Kanagawa, JP;
Hideo Tsukamoto, Kanagawa, JP;
Hidetoshi Umebayashi, Kanagawa, JP;
Makoto Nakano, Kanagawa, JP;
Toho Catalyst Co., Ltd., Kurobe, JP;
Abstract
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 Å 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.