オレフィン重合方法 - Basel, Polyolefin, Game Beher

Title:

オレフィン重合方法

Document Type and Number:

Japanese Patent JP2009513724

Kind Code:

A

Abstract:

A process for polymerizing one or more alpha-olefins of formula CH₂-CHT wherein T is a hydrogen atom or a C₁-C₂₀alkyl radical comprising the following steps: a) contacting in a continuous way one or more of said alpha olefins with a metallocene based catalyst system in a loop reactor, wherein: (i) the reaction is carried out in a liquid medium; (ii) the average residence time of the metallocene-based catalyst system is not more than 30 minutes; (iii) the temperature of the loop ranges from 25° to 70° C.; in order to obtain a polymerization degree ranging from 60 to 500 g per gram of catalyst system; b) feeding in continuous the prepolymerized metallocene-based catalyst system obtained in step a) into a polymerization reactor C) polymerizing one or more alpha-olefins, the same or different from the alpha olefins used in step a), in the presence of said prepolymerized metallocene-based catalyst system.

More Like This:

WO/1999/029741	UNBRIDGED MONOCYCLOPENTADIENYL METAL COMPLEX CATALYST AND A PROCESS FOR POLYOLEFIN PRODUCTION
JPS5265591	PURIFICATION OF POLYOLEFINS
JP2001089514	TREATMENT OF CATALYST COMPONENT, OLEFIN POLYMERIZATION CATALYST AND POLYMERIZATION OF OLEFIN

Inventors:

Tonti, Maria, Sylvia
Oberhof, Marcus
Frayer, Volker
Buffman, Bernd

Application Number:

JP2006516084A

Publication Date:

April 02, 2009

Filing Date:

June 29, 2004

Export Citation:

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Assignee:

Basel, Polyolefin, Game Beher

International Classes:

C08F10/00; C08F4/6592; C08F110/06; C08F4/659

Domestic Patent References:

JP2004510036A	2004-04-02
JPH06228211A	1994-08-16
JP2003509543A	2003-03-11
JPH09157319A	1997-06-17

Attorney, Agent or Firm:

Kazuo Shamoto
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Ken Matsumoto

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