Title:
RUBBER COMPOSITION FOR TIRE TREAD
Document Type and Number:
Japanese Patent JPS6466250
Kind Code:
A
Abstract:
PURPOSE: To provide the titled composition outstanding in both crack and cut resistances, comprising specified proportion of natural rubber etc. and a polybutadiene with the cis content predominant and the difference between the Shore A hardnesses at the corresponding respective specified temperatures being specific value.
CONSTITUTION: The objective composition comprising (A) 10W60pts.wt. of a polybutadiene with the cis content of ≥98% and the difference ΔA between the Shore A hardnesses at -5°C and 23°C respectively being ≤4 and (B) 40W90 pts.wt. of natural rubber and/or a diene-based synthetic rubber.
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Inventors:
TAKINO HIROSHI
TOBORI HIROYUKI
TOMOKUNI HARUTAKA
TOBORI HIROYUKI
TOMOKUNI HARUTAKA
Application Number:
JP22444687A
Publication Date:
March 13, 1989
Filing Date:
September 08, 1987
Export Citation:
Assignee:
TOYO TIRE & RUBBER CO
International Classes:
B60C11/00; B60C1/00; C08L7/00; C08L9/00; C08L21/00; (IPC1-7): B60C11/00; C08L7/00; C08L9/00
Attorney, Agent or Firm:
Iwao Tamura