US 11,987,660 B2
Catalytic system and use thereof, and preparation method of syndiotactic 1,2-polybutadiene (s-PB)
Chunyu Zhang, Qingdao (CN); Lihua Na, Qingdao (CN); Qi Yang, Qingdao (CN); Heng Liu, Qingdao (CN); and Xuequan Zhang, Qingdao (CN)
Assigned to Qingdao University of Science & Technology, Qingdao (CN)
Filed by Qingdao University of Science & Technology, Qingdao (CN)
Filed on Dec. 13, 2022, as Appl. No. 18/080,175.
Prior Publication US 2023/0192912 A1, Jun. 22, 2023
Int. Cl. C08F 4/70 (2006.01); C08F 4/04 (2006.01); C08F 4/602 (2006.01); C08F 36/06 (2006.01); C08F 136/06 (2006.01)
CPC C08F 4/70 (2013.01) [C08F 4/04 (2013.01); C08F 4/602 (2013.01); C08F 36/06 (2013.01); C08F 136/06 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A catalytic system comprising:
an iron-containing organic compound, an azodicyano compound, an organoaluminum compound, and a free radical scavenger; wherein:
an iron element in the iron-containing organic compound, the azodicyano compound, the organoaluminum compound, and the free radical scavenger have a molar ratio of 1:(0.5-10):(5-100): (1-1000); and
the free radical scavenger is selected from the group consisting of a sterically hindered phenol, a sterically hindered amine, and a phosphorus-containing antioxidant.