Title:
RUBBER COMPOSITION FOR BELT AND RUBBER BELT
Document Type and Number:
Japanese Patent JP2017066176
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a rubber composition for belt excellent in processability and abrasion resistance and a rubber belt.SOLUTION: There is provided a rubber composition for belt containing polybutadiene (I) manufactured by polymerizing butadiene in a presence of a cobalt-based catalyst and satisfying following (1) to (5) requirements. (1) Mooney viscosity is 43 to 70. (2) a ratio of 5 wt.% toluene solution viscosity (Tcp) and Mooney viscosity (ML) (Tcp/ML) is 0.9 to 1.7. (3) stress relaxation time by 80% attenuation of a value of torque when the torque at Mooney viscosity measurement completion is 100% is 10.0 to 40.0 sec. (4) molecular weight distribution (Mw/Mn) is 2.50 to 4.00. (5) percentage of a cis-1,4 structure unit in a micro structure analysis is 94.0 to 98.0 mol%.SELECTED DRAWING: None
Inventors:
SHODA TSUNESHI
KANO YUTO
WATANABE TAKAYOSHI
CHANOKI YUTO
KANO YUTO
WATANABE TAKAYOSHI
CHANOKI YUTO
Application Number:
JP2015189370A
Publication Date:
April 06, 2017
Filing Date:
September 28, 2015
Export Citation:
Assignee:
UBE INDUSTRIES
International Classes:
C08L9/00; C08F136/06; C08K3/04; C08K3/36; C08L7/00
Domestic Patent References:
| JP2013122021A | 2013-06-20 | |||
| JP5994956B1 | 2016-09-21 | |||
| JP2010163590A | 2010-07-29 | |||
| JP2007126649A | 2007-05-24 | |||
| JP2016172862A | 2016-09-29 |
Foreign References:
| US20110269899A1 | 2011-11-03 | |||
| CN102245646A | 2011-11-16 | |||
| KR20110112315A | 2011-10-12 | |||
| US20170015766A1 | 2017-01-19 | |||
| CN106103505A | 2016-11-09 |
Attorney, Agent or Firm:
Masaki Akatsuka
Atsushi Naka
Atsushi Naka
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