	US 12,269,937 B2
	Modified conjugated diene-based polymer and rubber composition including the same
Min Sik Mun, Daejeon (KR); Ro Mi Lee, Daejeon (KR); Hyun Jun Kim, Daejeon (KR); and No Ma Kim, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/419,947
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed Sep. 2, 2020, PCT No. PCT/KR2020/011779 § 371(c)(1), (2) Date Jun. 30, 2021, PCT Pub. No. WO2021/085829, PCT Pub. Date May 6, 2021.
Claims priority of application No. 10-2019-0136536 (KR), filed on Oct. 30, 2019.
Prior Publication US 2022/0064416 A1, Mar. 3, 2022
Int. Cl. C08L 15/00 (2006.01); C08C 19/22 (2006.01); C08C 19/25 (2006.01); C08K 3/04 (2006.01); C08K 3/36 (2006.01); B60C 1/00 (2006.01)

CPC C08L 15/00 (2013.01) [C08C 19/22 (2013.01); C08C 19/25 (2013.01); C08K 3/04 (2013.01); C08K 3/36 (2013.01); B60C 1/00 (2013.01)]

9 Claims

1. A modified conjugated diene-based polymer satisfying the following conditions of i) to iv):

i) a mooney viscosity from 75 to less than 100 (MV, (ML1+4, @110° C. MU)), wherein the mooney viscosity measured in accordance with ASTM D1646 at 110° C.,

ii) a mooney stress relaxation ratio of 0.4 or less, wherein the mooney stress relaxation ratio is measured at 110° C.,

iii) a weight average molecular weight (Mw) of 750,000 g/mol or more; and

iv) a molecular weight distribution (MWD) from 1.0 to 2.0, wherein the MWD is a ratio of Mw to the number average molecular weight (Mn),

wherein the polymer has a coupling number of 3.2 or more; and

wherein the polymer has a 1,2-vinyl bond content from 5 wt % to 30 wt %, and

wherein the polymer has a unimodal shape molecular weight distribution curve by gel permeation chromatography.