Title:
【発明の名称】いわゆる耐衝撃性変性ポリプロピレン型のプロピレン―エチレン―共重合体の製造方法
Document Type and Number:
Japanese Patent JP2768749
Kind Code:
B2
Abstract:
Propylene/ethylene block copolymers are prepared by a continuous process in which, in each case in an agitated fixed bed of finely divided polymer from the gas phase, first (I) in a first polymerization zone, propylene is homopolymerized by feeding in a Ziegler-Natta catalyst system consisting of (1) a titanium component which contains titanium, magnesium, chlorine and a phthalic acid derivative, (2) an aluminumalkyl component and (3) a silane component, and (II) in a second polymerization zone, a mixture of propylene and ethylene is polymerized with the propylene homopolymer present in the reaction mixture obtained in the first polymerization zone by feeding in the said reaction mixture. In the process, (A) a titanium component (1) is used which is obtained by a method in which (1.1) first, (1.1.1) in a liquid hydrocarbon, (1.1.2) a finely divided magnesium halide, (1.1.3) an alkanol, (1.1.4) a certain phthalic acid derivative and (1.1.5) titanium tetrachloride are reacted with one another under certain conditions, (1.2) the solid intermediate obtained from (1.1) is extracted with titanium tetrachloride or a liquid alkylbenzene until the remaining solid substance has become substantially richer in magnesium, and (1.3) finally, the solid substance remaining in (1.2) is washed with an alkane in a certain manner, (B) a specific silane is used as (3), and (C) specifically selected polymerization parameters are employed, with relationships between the first and second polymerization zones.
More Like This:
Inventors:
Jurgen, Celtic
Liner, Alexander, Werner
Ralph, Zorku
Klaus Dieter, Lümpler
Gunther, Schweier
Rudolf, Muller-Mull
Wolfgang, Gruber
Liner, Alexander, Werner
Ralph, Zorku
Klaus Dieter, Lümpler
Gunther, Schweier
Rudolf, Muller-Mull
Wolfgang, Gruber
Application Number:
JP20707089A
Publication Date:
June 25, 1998
Filing Date:
August 11, 1989
Export Citation:
Assignee:
BASF Akchen Gezel Shaft
International Classes:
C08F2/34; C08F4/02; C08F4/58; C08F4/60; C08F4/64; C08F4/642; C08F297/08; (IPC1-7): C08F297/08
Attorney, Agent or Firm:
Tajiro Taiji