Title:
RUBBER COMPOSITION, TREAD RUBBER AND TIRE
Document Type and Number:
WIPO Patent Application WO/2020/071557
Kind Code:
A1
Abstract:
The present invention provides a rubber composition which has achieved a good balance among wet performance, wear resistance, low rolling resistance and fracture resistance at high levels. A rubber composition which contains a filler and a rubber component that contains at least three kinds of polymers, and which is configured such that: the rubber component is separated into at least two polymer phases, namely a polymer phase (1) that has the highest tan δ peak temperature and a polymer phase (2) that has the lowest peak temperature; the polymer phase (1) and the polymer phase (2) are incompatible with each other; the polymer phase (1) contains at least modified conjugated diene polymers (A1) and (A2), and a filler; the modified conjugated diene polymer (A1) has a specific weight average molecular weight and a specific shrinkage factor (g'); and if X is the filler concentration of the polymer phase (1) and Y is the average area of aggregates of the filler of the polymer phase (1), X and Y satisfy formula (1): Y < 4.8X + 1200.
Inventors:
NAKATANI KENJI (JP)
KUMAKI KENTARO (JP)
KUMAKI KENTARO (JP)
Application Number:
PCT/JP2019/039404
Publication Date:
April 09, 2020
Filing Date:
October 04, 2019
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
International Classes:
C08L15/00; C08C19/25; C08K3/013; C08L21/00
Domestic Patent References:
| WO2018034217A1 | 2018-02-22 | |||
| WO2019117218A1 | 2019-06-20 | |||
| WO2016194316A1 | 2016-12-08 | |||
| WO2017077712A1 | 2017-05-11 | |||
| WO2017077714A1 | 2017-05-11 |
Foreign References:
| JP2018028018A | 2018-02-22 | |||
| JP2014205842A | 2014-10-30 | |||
| JP2017002189A | 2017-01-05 | |||
| JPH0827313A | 1996-01-30 | |||
| JP2017190457A | 2017-10-19 |
Other References:
R. R. HAMPTON: "Analytical Chemistry", vol. 21, 1949, article "Hampton's method", pages: 923
See also references of EP 3862391A4
See also references of EP 3862391A4
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
Download PDF: