US 12,116,445 B2
Polyolefin-polystyrene multi-block copolymer and method for producing same
Ji Hyun Park, Daejeon (KR); Dae Woong Lee, Daejeon (KR); Sung Hyun Park, Daejeon (KR); Seok Pil Sa, Daejeon (KR); Seul Ki Im, Daejeon (KR); Hyun Mo Lee, Daejeon (KR); Yun Kon Kim, Daejeon (KR); Ki Soo Lee, Daejeon (KR); Myung Han Lee, Daejeon (KR); and Eun Ji Shin, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/602,048
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed May 15, 2020, PCT No. PCT/KR2020/006436
§ 371(c)(1), (2) Date Oct. 7, 2021,
PCT Pub. No. WO2020/235882, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 10-2019-0058295 (KR), filed on May 17, 2019; and application No. 10-2019-0121193 (KR), filed on Sep. 30, 2019.
Prior Publication US 2022/0195101 A1, Jun. 23, 2022
Int. Cl. C08F 297/02 (2006.01); C08F 2/38 (2006.01); C08F 10/14 (2006.01); C08F 12/08 (2006.01)
CPC C08F 297/02 (2013.01) [C08F 2/38 (2013.01); C08F 10/14 (2013.01); C08F 12/08 (2013.01)] 9 Claims
 
1. A polyolefin-polystyrene multi-block copolymer having a ratio of a loss modulus (E″) to a storage modulus (E′) satisfying the following conditions (a) and (b) a temperature range of −80° C., 40° C., wherein the ratio is represented by a loss tangent (tan δ) value and is obtained by dynamic mechanical analysis (DMA):
(a) a maximum of the tan δ value in a peak present in the temperature range is 0.20 to 0.35; and
(b) a half-width of the peak ranges from 32.0° C. to 50.0° C.