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Title:
SOLID CATALYST INGREDIENT AND CATALYST EACH FOR OLEFIN POLYMERIZATION AND PROPYLENE BLOCK COPOLYMER
Document Type and Number:
WIPO Patent Application WO/2002/081527
Kind Code:
A1
Abstract:
A catalyst for olefin polymerization which comprises: a solid catalyst ingredient for olefin polymerization which contains magnesium, titanium, and halogen atoms, has been morphologically regulated so as to have an average particle diameter, specific surface area, and pore volume in respective specific ranges and a pore size distribution in which the cumulative volume of pores having a diameter of 100 � or shorter exceeds 50%; an organoaluminum compound; and an organosilicon compound. When this catalyst is used in propylene/ethylene copolymerization, an ethylene/propylene copolymer serving as a rubber ingredient can be incorporated in a high proportion and in a highly dispersed state into a propylene polymer. Thus, a propylene block copolymer having a satisfactory balance between rigidity and impact resistance can be produced. The copolymer is extremely useful especially in applications such as automotive parts, e.g., bumpers, and parts for domestic electrical appliances.

Inventors:
HOSAKA MOTOKI (JP)
TSUKAMOTO HIDEO (JP)
UMEBAYASHI HIDETOSHI (JP)
NAKANO MAKOTO (JP)
Application Number:
PCT/JP2002/003045
Publication Date:
October 17, 2002
Filing Date:
March 28, 2002
Export Citation:
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Assignee:
TOHO CATALYST CO LTD (JP)
HOSAKA MOTOKI (JP)
TSUKAMOTO HIDEO (JP)
UMEBAYASHI HIDETOSHI (JP)
NAKANO MAKOTO (JP)
International Classes:
C08F4/654; C08F210/06; C08F297/08; C08F210/16; (IPC1-7): C08F4/654; C08F10/00; C08F297/08
Foreign References:
EP0751160A11997-01-02
EP0461268A11991-12-18
JPH10176023A1998-06-30
EP0472946A21992-03-04
JPH1060041A1998-03-03
JPH10176023A1998-06-30
EP0136112A21985-04-03
US4686265A1987-08-11
EP0751160A11997-01-02
JPH0362805A1991-03-18
Other References:
See also references of EP 1283222A4
Attorney, Agent or Firm:
Akatsuka, Kenji (5F 1-16 Kanda Suda-cho Chiyoda-ku, Tokyo, JP)
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