Title:
METHOD FOR PRODUCING POLYPROPYLENE
Document Type and Number:
Japanese Patent JP2020066707
Kind Code:
A
Abstract:
To provide a method for producing polypropylene which has high catalyst activity, and reduces atactic polypropylene and increases a high molecular weight component.SOLUTION: A method for producing polypropylene includes a step of polymerizing propylene in the presence of a catalyst for propylene polymerization which contains a solid catalyst component (A) obtained by subjecting a solid component (A1) containing Ti, Mg and chlorine, a vinylsilane compound (A2) and at least one compound (A3) selected from an organic silicon compound having an alkoxy group and a compound having two ether bonds to contact treatment, an organic aluminum compound (B) and component (C): RRSi(OR), in which a molar ratio of the component (B) to the component (C) is 5 to 50. In formula, Rrepresents a linear hydrocarbon group having a secondary carbon atom; Rrepresents an aliphatic hydrocarbon group or a hetero atom-containing hydrocarbon group that is the same as or different from R; and Rrepresents a hydrocarbon group.SELECTED DRAWING: None
Inventors:
IWAI NOBUHIRO
MIZUKAMI SHIGEO
MIZUKAMI SHIGEO
Application Number:
JP2018201662A
Publication Date:
April 30, 2020
Filing Date:
October 26, 2018
Export Citation:
Assignee:
JAPAN POLYPROPYLENE CORP
International Classes:
C08F4/658; C08F10/00
Attorney, Agent or Firm:
Kishimoto Tatsuto
Akihiko Yamashita
Noriyuki Yamamoto
Akihiko Yamashita
Noriyuki Yamamoto