US 11,912,873 B2
Polymer composition, crosslinked polymer, and tire
Toshimitsu Kikuchi, Tokyo (JP); Takuya Sano, Tokyo (JP); Hirofumi Senga, Tokyo (JP); Yuto Sakagami, Tokyo (JP); Takato Fukumoto, Tokyo (JP); and Toshiyuki Hayakawa, Tokyo (JP)
Assigned to ENEOS Materials Corporation, Tokyo (JP)
Filed by ENEOS Materials Corporation, Tokyo (JP)
Filed on Jan. 29, 2021, as Appl. No. 17/161,688.
Claims priority of application No. 2020-017736 (JP), filed on Feb. 5, 2020.
Prior Publication US 2021/0238396 A1, Aug. 5, 2021
Int. Cl. C08L 9/06 (2006.01); B60C 1/00 (2006.01); C08K 5/00 (2006.01)
CPC C08L 9/06 (2013.01) [B60C 1/0016 (2013.01); B60C 1/0025 (2013.01); C08K 5/0025 (2013.01)] 4 Claims
 
1. A polymer composition, comprising:
(A) a conjugated diene rubber wherein a polymer corresponding to the following component (B) is excluded; and
(B) a hydrogenated product of the polymer that satisfies the following (1) to (3), which is the polymer in which 80% or more of structural units derived from butadiene are hydrogenated:
(1) being a copolymer of a conjugated diene compound containing butadiene and an aromatic vinyl compound,
(2) comprising a polybutadiene block having a vinyl group content of 20% or less, and
(3) comprising a block composed of a conjugated diene compound and an aromatic vinyl compound,
wherein, when constituent proportions of a structural unit represented by the following Formula (1), a structural unit represented by the following Formula (2), a structural unit represented by the following Formula (3), and a structural unit represented by the following Formula (4) are set as p, q, r, and s, respectively, the component (B) is a hydrogenated conjugated diene polymer that satisfies the following Formula (A):
0.80≤(p+(0.5×r))/(p+q+(0.5×r)+s)≤0.98  (A)

OG Complex Work Unit Chemistry