US 11,965,051 B2
Symmetrical polyolefin block copolymer and preparation method therefor
Bun Yeoul Lee, Suwon-si (KR); Sung Dong Kim, Suwon-si (KR); Su Jin Gwon, Seongnam-si (KR); and Tae Hee Kim, Bucheon-si (KR)
Assigned to AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION, Suwon-si (KR)
Appl. No. 16/977,943
Filed by AJOU UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION, Suwon-si (KR)
PCT Filed Dec. 21, 2018, PCT No. PCT/KR2018/016463
§ 371(c)(1), (2) Date Sep. 3, 2020,
PCT Pub. No. WO2019/172512, PCT Pub. Date Sep. 12, 2019.
Claims priority of application No. 10-2018-0026543 (KR), filed on Mar. 6, 2018.
Prior Publication US 2021/0371570 A1, Dec. 2, 2021
Int. Cl. C08F 297/08 (2006.01); C08F 2/06 (2006.01); C08F 2/38 (2006.01); C08F 4/34 (2006.01); C08F 4/50 (2006.01); C08F 4/619 (2006.01); C08F 4/659 (2006.01); C08F 110/06 (2006.01); C08F 210/16 (2006.01)
CPC C08F 297/086 (2013.01) [C08F 2/06 (2013.01); C08F 2/38 (2013.01); C08F 4/34 (2013.01); C08F 4/50 (2013.01); C08F 110/06 (2013.01); C08F 210/16 (2013.01); C08F 2410/01 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of preparing a polyolefin block copolymer represented by Formula 1, the method comprising:
the first step in which a compound represented by Formula A is prepared by coordination polymerization of an olefin monomer using a transition metal catalyst in the presence of an organozinc compound represented by Formula A-1; and
the second step in which a compound represented by Formula B-1 is added to and reacted with the compound represented by Formula A
(R1)2Zn  [Formula A-1]

OG Complex Work Unit Chemistry
R5C(O)O—OC(O)R5  [Formula B-1]

OG Complex Work Unit Chemistry
wherein Formula A-1, Formula A, Formula B-1 and Formula 1, R1 and R5 are each independently a C1 to C20 hydrocarbyl group; R2 to R4 are each independently one selected from among hydrogen, a methyl group, an ethyl group, a butyl group, and a hexyl group; p and 1-p are mole fractions of sub-repeat units constituting a repeat unit b, respectively, p being greater than 0 and less than 1; a ranges from 50 to 5,000 on average or is 0; and b ranges from 50 to 5,000 on average.