Title:
多孔性ポリマーの製造方法およびそれから得られるポリマー
Document Type and Number:
Japanese Patent JP2004516365
Kind Code:
A
Abstract:
A process for preparing porous olefin polymers comprising bringing into contact in a polymerization reactor, at a temperature T1, one or more olefins of the formula (I) CH2-CHR1, R1 being hydrogen, a C1-C20-alkyl or a C6-C12-aryl group, with a catalyst obtained by reacting a solid catalyst component in the form of spheroidal particles comprising a compound of Ti or V not containing metal-pi bonds and a Mg halide, optionally containing one or more electron donor compounds, with an aluminum-alkyl (Al-alkyl) compound, then raising the temperature up to the polymerization temperature, said process being characterized in that: a) if the temperature T1 is lower than 40° C., the temperature is raised up to the polymerization temperature is such a way that, for a time of at least one minute after the introduction temperature in such a way that, for a time of at least one minute after the introduction of the catalyst system into the reactor, the temperature of the reaction T2 fulfills the following condition of formula (II) wherein m is the time expressed in minutes employed for reaching the temperature T2; or b) if temperature T1 is 40° C. or higher, the reactor is maintained for a time of at least one minute at a temperature of at least 40° C.
Inventors:
Ferraro, angelo
Baruzzi, Giovanni
Stewart, Constantin, A.
Fusco, Ofelia
Baruzzi, Giovanni
Stewart, Constantin, A.
Fusco, Ofelia
Application Number:
JP2002552976A
Publication Date:
June 03, 2004
Filing Date:
December 21, 2001
Export Citation:
Assignee:
Basell Poliolefine Italia S.p.A.
International Classes:
C08F2/00; C08F4/02; C08F4/62; C08F10/00; C08F10/06; C08L23/10; C08F110/06; (IPC1-7): C08F2/00; C08F10/00
Attorney, Agent or Firm:
Shintaro Nogawa