Rubber composition for tire tread and manufacturing method thereof
AssigneeKorea Kumho Petrochemical Co., Ltd.
InventorsJae Yun Kim, Yeong Min Jung, Soo Jung Park, Eun Kyung Noh, Dong Eun Kang
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Abstract
Proposed is a rubber composition for a tire tread, which includes: a solution-polymerized elastomer having a conjugated diene-based monomer unit, a solution-polymerized elastomer having an aromatic vinyl monomer unit and a conjugated diene-based monomer unit, or a combination thereof, at 100 parts by weight; and a plasticizer containing an aromatic petroleum resin and an aliphatic olefin polymer, at 10 to 50 parts by weight. Further, a manufacturing method of the rubber composition for a tire tread is proposed.
Claims12
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.
A method of manufacturing a rubber composition for a tire tread, comprising:
- (a) adding 20 to 40 parts by weight of a plasticizer containing an aromatic petroleum resin and an aliphatic olefin polymer to 100 parts by weight of a solution containing polybutadiene rubber, and a solution-polymerized elastomer having styrene monomer unit and butadiene monomer unit;
- and
- (b) removing a solvent contained in a product of (a),
- 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.
Dependencies are inferred from the claim text.