Patent ID: 11884105
Assignee: KOREA KUMHO PETROCHEMICAL CO., LTD.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 0:
1. A rubber composition for a tire tread, comprising:
a combination of polybutadiene rubber, and a solution-polymerized elastomer having styrene monomer unit and butadiene monomer unit, at 100 parts by weight; and
a plasticizer containing an aromatic petroleum resin and an aliphatic olefin polymer, at 20 to 40 parts by weight,
wherein an amount of the aliphatic olefin polymer is 20 to 30% by weight based on a total weight of the plasticizer,
wherein the aromatic petroleum resin of the plasticizer is a liquid C9 petroleum resin, and the aliphatic olefin polymer of the plasticizer is a liquid conjugated diene-based polymer, a liquid saturated hydrocarbon polymer, or a combination thereof, and
wherein the liquid C9 petroleum resin has a softening point of 40° C. or less.