Rubber composition and pneumatic tire

Patent metadata

Field	Value
Publication number	US-9790353-B2
Application number	US-201415114548-A
Country	US
Kind code	B2
Filing date	Dec 22, 2014
Priority date	Jan 31, 2014
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

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.

First claim

The invention claimed is:

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 .

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Takahashi Ryota
• Kato Manabu
• Okamatsu Takahiro
• Kirino Yoshiaki

Classifications

• C08L9/06

  Copolymers with styrene · CPC title

• C08C19/22

  Incorporating nitrogen atoms into the molecule · CPC title

• C08L15/00 Primary

  Compositions of rubber derivatives (C08L11/00, C08L13/00 take precedence) · CPC title

• B60C1/0016

  Compositions of the tread · CPC title

• C08L2205/03

  containing three or more polymers in a blend · CPC title