	US 12,065,524 B2
	EPDM copolymer and method of preparing the same
Byoung Tak Yim, Daejeon (KR); Byung Jun Kim, Daejeon (KR); and Jeong Hwan Kim, Daejeon (KR)
Assigned to SK Innovation Co., Ltd., Seoul (KR); and SK Geo Centric Co., Ltd, Seoul (KR)
Filed by SK Innovation Co., Ltd., Seoul (KR); and SK Geo Centric Co., Ltd., Seoul (KR)
Filed on May 26, 2022, as Appl. No. 17/825,122.
Claims priority of application No. 10-2021-0070279 (KR), filed on May 31, 2021.
Prior Publication US 2022/0389140 A1, Dec. 8, 2022
Int. Cl. C08F 210/18 (2006.01); C08F 4/52 (2006.01); C08F 4/68 (2006.01); C08K 3/013 (2018.01); C08K 3/04 (2006.01)

CPC C08F 210/18 (2013.01) [C08F 4/52 (2013.01); C08F 4/68 (2013.01); C08K 3/013 (2018.01); C08K 3/04 (2013.01)]

19 Claims

1. An ethylene-propylene-diene monomer (EPDM) copolymer satisfying the following conditions i) to iii):

i) a Mooney viscosity (ML1+4) of 60 or more at 150° C.,

ii) an ethylene (C2) content of 45 to 70 wt %, and

iii) a Mooney viscosity (ML1+4) of 45 or less as measured at 100° ° C. under the following EPDM composition conditions:

the EPDM composition conditions of iii) being mixing 72 parts by weight of carbon black, 60 parts by weight of a paraffin oil, 50 parts by weight of CaCO₃, 2 parts by weight of polyethylene glycol, 6 parts by weight of ZnO, and 2 parts by weight of a stearic acid, based on 100 parts by weight of the EPDM copolymer, at 50° C. at 60 rpm in a Banbury mixer.