Title:
プロピレン系ブロック共重合体の製造方法ならびにオレフィン重合用固体状チタン触媒成分
Document Type and Number:
Japanese Patent JP6923742
Kind Code:
B2
Abstract:
The purpose of the present invention is to provide a propylene-based block copolymer, the deposition thereof on the inner wall of the polymerization vessel having been sufficiently inhibited. The propylene-based block copolymer of the present invention has a flowability evaluation value of 40% or less, the value being calculated with the following equation wherein X (sec) is the number of seconds over which 100 g of the copolymer having ordinary temperature falls from a stainless-steel funnel having an inner diameter of 11.9 mm and Y (sec) is the number of seconds over which 100 g of the copolymer which has been held at 80°C for 24 hours under a load of 10 kg falls from the funnel having an inner diameter of 11.9 mm. Flowability evaluation value (%) = {(Y/X)-1}×100.
Inventors:
Atsushi Sakuma
Kazutaka Tsuru
Kenichiro Okamura
Kazutaka Tsuru
Kenichiro Okamura
Application Number:
JP2020505095A
Publication Date:
August 25, 2021
Filing Date:
March 07, 2019
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
C08F4/654; C08F255/02
Domestic Patent References:
| JP2017002118A | ||||
| JP2016204649A | ||||
| JP2003502487A | ||||
| JP2017535660A | ||||
| JP2002356507A | ||||
| JP58057407A |
Foreign References:
| WO2005102973A1 |
Attorney, Agent or Firm:
Washeda International Patent Office