| 摘要 |
The present invention provides a rubber composition for tires which enables a balanced improvement in rolling resistance, abrasion resistance, and wet-skid performance. The present invention relates to a rubber composition for tires, including a rubber blend including a diene rubber A modified with a specific acrylamide compound, and a diene rubber B modified with either a combination of a specific silicon or tin compound and a specific modifying compound or with the modifying compound, the combined rubbers A and B having a weight average molecular weight of 300,000 to 1,400,000; and a specific silica. |
| 主权项 |
1. A rubber composition for tires, comprising
a diene rubber A modified with an acrylamide compound represented by Formula (I): wherein R1 represents hydrogen or a methyl group; R2 and R3 each represent an alkyl group; and n represents an integer, and a diene rubber B modified with either a combination of a silicon or tin compound represented by Formula (II) and a modifying compound represented by Formula (III) or with a modifying compound represented by Formula (III):
RaMXb (II) wherein R represents an alkyl, alkenyl, cycloalkenyl, or aromatic hydrocarbon group; M represents silicon or tin; X represents a halogen; a represents an integer of 0 to 2; and b represents an integer of 2 to 4, wherein R4 to R6 are the same as or different from one another, each representing a C1 to C8 alkyl group; R7 to R12 are the same as or different from one another, each representing a C1 to C8 alkoxy or alkyl group; and p to r are the same as or different from one another, each representing an integer of 1 to 8, the combined modified diene rubbers A and B having a weight average molecular weight of 300,000 to 1,400,000, and the rubber composition further comprising silica having a CTAB specific surface area of 180 m2/g or more and a BET specific surface area of 185 m2/g or more. |
