Rubber composition and pneumatic tire
An object of the present invention is to provide a rubber composition capable of producing a pneumatic tire with both excellent low rolling resistance and wet grip performance, and a pneumatic tire comprising the rubber composition. The rubber composition comprises: a diene-based rubber containing 10 mass % or greater of a modified diene polymer; and an aromatic modified terpene resin; wherein the modified diene polymer is a modified polymer obtained by modifying an unmodified diene polymer (A) with a nitrone compound (B) having a carboxy group; and a content of the aromatic modified terpene resin is from 0.1 to 50 parts by mass per 100 parts by mass of the diene-based rubber.
1. A rubber composition comprising:
a diene-based rubber containing 10 mass % or greater of a modified diene polymer; and
an aromatic modified terpene resin; wherein
the modified diene polymer is a modified polymer obtained by modifying an unmodified aromatic vinyl-conjugated diene copolymer (A) with a nitrone compound (B) having a carboxy group;
a content of the aromatic modified terpene resin is from 0.1 to 50 parts by mass per 100 parts by mass of the diene-based rubber; and
the nitrone compound (B) is a compound selected from the group consisting of N-phenyl-α-(4-carboxyphenyl) nitrone, N-phenyl-α-(3-carboxyphenyl)nitrone, N-phenyl-α-(2-carboxyphenyl)nitrone, N-(4-carboxyphenyl)-α-phenylnitrone, N-(3-carboxyphenyl)-α-phenylnitrone, and N-(2-carboxyphenyl)-α-phenylnitrone.
2. The rubber composition according to claim 1 , wherein a modification ratio of the modified diene polymer is from 0.01 to 2.0 mol %.
3. The rubber composition according to claim 1 further comprising a white filler.
4. A pneumatic tire comprising the rubber composition described in claim 1 .
5. The rubber composition according to claim 2 further comprising a white filler.
6. A pneumatic tire comprising the rubber composition described in claim 2 .
7. A pneumatic tire comprising the rubber composition described in claim 3 .