Rubber composition for tread, and pneumatic tire

Patent metadata

Field	Value
Publication number	US-11458768-B2
Application number	US-201816627945-A
Country	US
Kind code	B2
Filing date	May 23, 2018
Priority date	Jul 19, 2017
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

The present invention provides a tread rubber composition that is excellent in wet grip performance during the initial phase of running and tensile properties, and a pneumatic tire including the tread rubber composition. The present invention relates to a tread rubber composition containing: a diene rubber; silica; and sulfur and/or a sulfur-containing compound, the tread rubber composition satisfying the following relationships (1) to (3):

EB/M300≥50  (1);

M100≥1.7 MPa  (2); and

EB≥500%  (3).

First claim

The invention claimed is:

1. A tire comprising a tread formed of a tread rubber composition, the tread rubber composition comprising:
a diene rubber;
silica; and
at least one of sulfur or a sulfur-containing compound,
the tread rubber composition satisfying the following relationships (1) to (3):
70≤EB/M300≤200  (1);

M100≥2.0 MPa  (2); and

EB≥580%  (3).

2. The tire according to claim 1 ,
wherein the diene rubber comprises at least one of a modified styrene-butadiene rubber or a modified polybutadiene rubber.

3. The tire according to claim 1 ,
wherein the diene rubber comprises an alkoxysilyl-modified styrene-butadiene rubber.

4. The tire according to claim 1 , comprising at least one of a sulfur-containing oligomer or a rosin resin.

5. A tire comprising a tread formed of a tread rubber composition, comprising:
a diene rubber;
silica; and
at least one of sulfur or a sulfur-containing compound,
the tread rubber composition satisfying the following relationships (1) to (4):
EB/M300≥70  (1);

M100≥2.0 MPa  (2);

EB≥580%  (3); and

6.7 MPa≤M300≤9.7 MPa  (4).

6. A tire comprising a tread formed of a tread rubber composition, comprising:
a diene rubber;
silica; and
at least one of sulfur or a sulfur-containing compound,
the tread rubber composition satisfying the following relationships (1) to (4):
70≤EB/M300≤200  (1);

M100≥2.0 MPa  (2);

EB≥580%  (3); and

6.7 MPa≤M300≤9.7 MPa  (4).

Assignees

• Sumitomo Rubber Ind

Inventors

• Miyazaki Tatsuya

Classifications

• C08L93/04

  Rosin · CPC title

• C08F136/06 Primary

  Butadiene · CPC title

• C08K3/06

  Sulfur · CPC title

• B60C11/00

  Tyre tread bands; Tread patterns; Anti-skid inserts · CPC title

• C08C19/44

  of polymers containing metal atoms exclusively at one or both ends of the skeleton · CPC title