Title:
PROPYLENE-ETHYLENE BLOCK COPOLYMER
Document Type and Number:
Japanese Patent JP3670002
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a propylene-ethylene block copolymer having excellent rigidity, heat resistance and shock resistance.
SOLUTION: The propylene-ethylene copolymer is characterized by that the propylene ingredient in the propylene-ethylene copolymer has a high isotactic pentad fraction of ≥0.97 and each of silicon atom concentration and chlorine atom concentration contained in the block copolymer is ≤10 ppm especially the silicon atom concentration is ≤5 ppm.
Inventors:
Junichi Fujii
Yoshiyuki Kitajima
Yoshiyuki Kitajima
Application Number:
JP2005025921A
Publication Date:
July 13, 2005
Filing Date:
February 02, 2005
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
International Classes:
C08F297/08; C08F4/646; (IPC1-7): C08F297/08; C08F4/646
Domestic Patent References:
| JP7102028A | ||||
| JP7286022A | ||||
| JP885714A | ||||
| JP8239416A | ||||
| JP827237A | ||||
| JP8325327A | ||||
| JP8259583A |
Attorney, Agent or Firm:
Kihei Watanabe