Title:
RUBBER COMPOSITION HAVING EXCELLENT DISCOLORATION RESISTANCE AND FLEX CRACK RESISTANCE AND PNEUMATIC TIRE PRODUCED BY USING THE RUBBER COMPOSITION AS SIDEWALL RUBBER
Document Type and Number:
Japanese Patent JP2005068332
Kind Code:
A
Abstract:
To provide a rubber composition having improvable weather resistance, discoloration resistance and flex crack resistance and a pneumatic tire produced by using the rubber composition as the sidewall.
The rubber composition is produced by dispersing 25-60 wt.% one or more kinds of butyl rubbers selected from butyl rubber, a halogenated butyl rubber and a halogenated copolymer rubber of a 4-7C isomonoolefin and a p-alkylstyrene in 40-75 wt.% diene rubber and subjecting the dispersion to dynamic crosslinking by kneading at a discharging temperature of ≥140°C. The pneumatic tire has a sidewall composed of the rubber composition.
Inventors:
KISHIMOTO HIROMICHI
MURAOKA KIYOSHIGE
HORIGUCHI TAKUYA
MATSUO TOSHIAKI
MURAOKA KIYOSHIGE
HORIGUCHI TAKUYA
MATSUO TOSHIAKI
Application Number:
JP2003301949A
Publication Date:
March 17, 2005
Filing Date:
August 26, 2003
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
B60C1/00; C08J3/24; C08L9/00; C08L23/22; C08L23/28; (IPC1-7): C08J3/24; B60C1/00; C08L9/00; C08L23/22; C08L23/28
Attorney, Agent or Firm:
Sota Asahina
Kei Saki
Kei Saki