	US 11,912,858 B2
	Molded bale of rubber-like block copolymer, rubber composition, crosslinking rubber composition, and tread for tire
Yoshifumi Araki, Tokyo (JP); Atsushi Yasumoto, Tokyo (JP); Daigo Matsuoka, Tokyo (JP); Yoshihisa Inoue, Tokyo (JP); and Tomohiro Kondo, Tokyo (JP)
Assigned to Asahi Kasei Kabushiki Kaisha, Tokyo (JP)
Filed by Asahi Kasei Kabushiki Kaisha, Tokyo (JP)
Filed on Jul. 2, 2021, as Appl. No. 17/366,226.
Claims priority of application No. 2020-115843 (JP), filed on Jul. 3, 2020.
Prior Publication US 2022/0002535 A1, Jan. 6, 2022
Int. Cl. C08L 53/02 (2006.01); C08L 9/00 (2006.01); C08L 23/16 (2006.01); C08K 3/36 (2006.01); B60C 1/00 (2006.01)

CPC C08L 53/025 (2013.01) [B60C 1/0016 (2013.01); C08K 3/36 (2013.01); C08L 9/00 (2013.01); C08L 23/16 (2013.01); C08L 2205/035 (2013.01)]

20 Claims

1. A molded bale of a rubber block copolymer, the rubber block copolymer comprising:

5% by mass or more and 95% by mass or less of a polymer block (a) having a content of a vinyl aromatic monomer unit of 22% by mass or less; and

5% by mass or more and 95% by mass or less of a polymer block (b) having a content of a vinyl aromatic monomer unit of 23% by mass or more and less than 50% by mass,

wherein the rubber-like block copolymer has an iodine value of 10 to 250, an ethylene structure content of 3% by mass or more, and a vinyl aromatic monomer block content of less than 10% by mass.