	US 12,116,482 B2
	Racing tire rubber composition and method for manufacturing same
Dong Hoon Oh, Daejeon (KR); Namsun Choi, Daejeon (KR); and Young Woo Lim, Gwangju (KR)
Assigned to KOREA KUMHO PETROCHEMICAL CO., LTD., Seoul (KR)
Appl. No. 17/292,740
Filed by KOREA KUMHO PETROCHEMICAL CO., LTD., Seoul (KR)
PCT Filed Nov. 11, 2019, PCT No. PCT/KR2019/015289 § 371(c)(1), (2) Date May 11, 2021, PCT Pub. No. WO2020/101309, PCT Pub. Date May 22, 2020.
Claims priority of application No. 10-2018-0138397 (KR), filed on Nov. 12, 2018.
Prior Publication US 2021/0395498 A1, Dec. 23, 2021
Int. Cl. C08L 9/06 (2006.01); B60C 1/00 (2006.01); C08J 3/22 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)

CPC C08L 9/06 (2013.01) [B60C 1/00 (2013.01); C08J 3/226 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C08J 2309/06 (2013.01); C08L 2207/322 (2013.01); C08L 2310/00 (2013.01)]

14 Claims

1. A racing tire rubber composition comprising:

rubber at 30 to 60% by weight;

carbon black at 10 to 30% by weight;

carbon nanotubes at 1 to 20% by weight; and

an oil at 10 to 50% by weight,

wherein the carbon black includes:

first carbon black having an iodine adsorption amount of 100 to 130 mg/g and a dibutyl phthalate (DBP) oil absorption amount of 115 to 135 ml/100 g; and

second carbon black having an iodine adsorption amount of 120 to 140 mg/g and a DBP oil absorption amount of 120 to 145 ml/100 g, and

wherein, in the carbon black, the first carbon black and the second carbon black are mixed in a weight ratio of 1:0.05 to 0.5.